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ImageGenerator/public/fabric.js
Alban 66e0f08579 [wip]
2019-11-14 09:23:56 +01:00

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/*! Fabric.js Copyright 2008-2015, Printio (Juriy Zaytsev, Maxim Chernyak) */
var fabric = fabric || { version: '3.4.0' };
if (typeof exports !== 'undefined') {
exports.fabric = fabric;
}
/* _AMD_START_ */
else if (typeof define === 'function' && define.amd) {
define([], function() { return fabric; });
}
/* _AMD_END_ */
if (typeof document !== 'undefined' && typeof window !== 'undefined') {
if (document instanceof (typeof HTMLDocument !== 'undefined' ? HTMLDocument : Document)) {
fabric.document = document;
}
else {
fabric.document = document.implementation.createHTMLDocument('');
}
fabric.window = window;
}
else {
// assume we're running under node.js when document/window are not present
var jsdom = require('jsdom');
var virtualWindow = new jsdom.JSDOM(
decodeURIComponent('%3C!DOCTYPE%20html%3E%3Chtml%3E%3Chead%3E%3C%2Fhead%3E%3Cbody%3E%3C%2Fbody%3E%3C%2Fhtml%3E'),
{
features: {
FetchExternalResources: ['img']
},
resources: 'usable'
}).window;
fabric.document = virtualWindow.document;
fabric.jsdomImplForWrapper = require('jsdom/lib/jsdom/living/generated/utils').implForWrapper;
fabric.nodeCanvas = require('jsdom/lib/jsdom/utils').Canvas;
fabric.window = virtualWindow;
DOMParser = fabric.window.DOMParser;
}
/**
* True when in environment that supports touch events
* @type boolean
*/
fabric.isTouchSupported = 'ontouchstart' in fabric.window || 'ontouchstart' in fabric.document ||
(fabric.window && fabric.window.navigator && fabric.window.navigator.maxTouchPoints > 0);
/**
* True when in environment that's probably Node.js
* @type boolean
*/
fabric.isLikelyNode = typeof Buffer !== 'undefined' &&
typeof window === 'undefined';
/* _FROM_SVG_START_ */
/**
* Attributes parsed from all SVG elements
* @type array
*/
fabric.SHARED_ATTRIBUTES = [
'display',
'transform',
'fill', 'fill-opacity', 'fill-rule',
'opacity',
'stroke', 'stroke-dasharray', 'stroke-linecap', 'stroke-dashoffset',
'stroke-linejoin', 'stroke-miterlimit',
'stroke-opacity', 'stroke-width',
'id', 'paint-order', 'vector-effect',
'instantiated_by_use', 'clip-path'
];
/* _FROM_SVG_END_ */
/**
* Pixel per Inch as a default value set to 96. Can be changed for more realistic conversion.
*/
fabric.DPI = 96;
fabric.reNum = '(?:[-+]?(?:\\d+|\\d*\\.\\d+)(?:[eE][-+]?\\d+)?)';
fabric.fontPaths = { };
fabric.iMatrix = [1, 0, 0, 1, 0, 0];
/**
* Pixel limit for cache canvases. 1Mpx , 4Mpx should be fine.
* @since 1.7.14
* @type Number
* @default
*/
fabric.perfLimitSizeTotal = 2097152;
/**
* Pixel limit for cache canvases width or height. IE fixes the maximum at 5000
* @since 1.7.14
* @type Number
* @default
*/
fabric.maxCacheSideLimit = 4096;
/**
* Lowest pixel limit for cache canvases, set at 256PX
* @since 1.7.14
* @type Number
* @default
*/
fabric.minCacheSideLimit = 256;
/**
* Cache Object for widths of chars in text rendering.
*/
fabric.charWidthsCache = { };
/**
* if webgl is enabled and available, textureSize will determine the size
* of the canvas backend
* @since 2.0.0
* @type Number
* @default
*/
fabric.textureSize = 2048;
/**
* When 'true', style information is not retained when copy/pasting text, making
* pasted text use destination style.
* Defaults to 'false'.
* @type Boolean
* @default
*/
fabric.disableStyleCopyPaste = false;
/**
* Enable webgl for filtering picture is available
* A filtering backend will be initialized, this will both take memory and
* time since a default 2048x2048 canvas will be created for the gl context
* @since 2.0.0
* @type Boolean
* @default
*/
fabric.enableGLFiltering = true;
/**
* Device Pixel Ratio
* @see https://developer.apple.com/library/safari/documentation/AudioVideo/Conceptual/HTML-canvas-guide/SettingUptheCanvas/SettingUptheCanvas.html
*/
fabric.devicePixelRatio = fabric.window.devicePixelRatio ||
fabric.window.webkitDevicePixelRatio ||
fabric.window.mozDevicePixelRatio ||
1;
/**
* Browser-specific constant to adjust CanvasRenderingContext2D.shadowBlur value,
* which is unitless and not rendered equally across browsers.
*
* Values that work quite well (as of October 2017) are:
* - Chrome: 1.5
* - Edge: 1.75
* - Firefox: 0.9
* - Safari: 0.95
*
* @since 2.0.0
* @type Number
* @default 1
*/
fabric.browserShadowBlurConstant = 1;
/**
* This object contains the result of arc to beizer conversion for faster retrieving if the same arc needs to be converted again.
* It was an internal variable, is accessible since version 2.3.4
*/
fabric.arcToSegmentsCache = { };
/**
* This object keeps the results of the boundsOfCurve calculation mapped by the joined arguments necessary to calculate it.
* It does speed up calculation, if you parse and add always the same paths, but in case of heavy usage of freedrawing
* you do not get any speed benefit and you get a big object in memory.
* The object was a private variable before, while now is appended to the lib so that you have access to it and you
* can eventually clear it.
* It was an internal variable, is accessible since version 2.3.4
*/
fabric.boundsOfCurveCache = { };
/**
* If disabled boundsOfCurveCache is not used. For apps that make heavy usage of pencil drawing probably disabling it is better
* @default true
*/
fabric.cachesBoundsOfCurve = true;
/**
* Skip performance testing of setupGLContext and force the use of putImageData that seems to be the one that works best on
* Chrome + old hardware. if your users are experiencing empty images after filtering you may try to force this to true
* this has to be set before instantiating the filtering backend ( before filtering the first image )
* @type Boolean
* @default false
*/
fabric.forceGLPutImageData = false;
fabric.initFilterBackend = function() {
if (fabric.enableGLFiltering && fabric.isWebglSupported && fabric.isWebglSupported(fabric.textureSize)) {
console.log('max texture size: ' + fabric.maxTextureSize);
return (new fabric.WebglFilterBackend({ tileSize: fabric.textureSize }));
}
else if (fabric.Canvas2dFilterBackend) {
return (new fabric.Canvas2dFilterBackend());
}
};
if (typeof document !== 'undefined' && typeof window !== 'undefined') {
// ensure globality even if entire library were function wrapped (as in Meteor.js packaging system)
window.fabric = fabric;
}
(function() {
/**
* @private
* @param {String} eventName
* @param {Function} handler
*/
function _removeEventListener(eventName, handler) {
if (!this.__eventListeners[eventName]) {
return;
}
var eventListener = this.__eventListeners[eventName];
if (handler) {
eventListener[eventListener.indexOf(handler)] = false;
}
else {
fabric.util.array.fill(eventListener, false);
}
}
/**
* Observes specified event
* @deprecated `observe` deprecated since 0.8.34 (use `on` instead)
* @memberOf fabric.Observable
* @alias on
* @param {String|Object} eventName Event name (eg. 'after:render') or object with key/value pairs (eg. {'after:render': handler, 'selection:cleared': handler})
* @param {Function} handler Function that receives a notification when an event of the specified type occurs
* @return {Self} thisArg
* @chainable
*/
function observe(eventName, handler) {
if (!this.__eventListeners) {
this.__eventListeners = { };
}
// one object with key/value pairs was passed
if (arguments.length === 1) {
for (var prop in eventName) {
this.on(prop, eventName[prop]);
}
}
else {
if (!this.__eventListeners[eventName]) {
this.__eventListeners[eventName] = [];
}
this.__eventListeners[eventName].push(handler);
}
return this;
}
/**
* Stops event observing for a particular event handler. Calling this method
* without arguments removes all handlers for all events
* @deprecated `stopObserving` deprecated since 0.8.34 (use `off` instead)
* @memberOf fabric.Observable
* @alias off
* @param {String|Object} eventName Event name (eg. 'after:render') or object with key/value pairs (eg. {'after:render': handler, 'selection:cleared': handler})
* @param {Function} handler Function to be deleted from EventListeners
* @return {Self} thisArg
* @chainable
*/
function stopObserving(eventName, handler) {
if (!this.__eventListeners) {
return this;
}
// remove all key/value pairs (event name -> event handler)
if (arguments.length === 0) {
for (eventName in this.__eventListeners) {
_removeEventListener.call(this, eventName);
}
}
// one object with key/value pairs was passed
else if (arguments.length === 1 && typeof arguments[0] === 'object') {
for (var prop in eventName) {
_removeEventListener.call(this, prop, eventName[prop]);
}
}
else {
_removeEventListener.call(this, eventName, handler);
}
return this;
}
/**
* Fires event with an optional options object
* @deprecated `fire` deprecated since 1.0.7 (use `trigger` instead)
* @memberOf fabric.Observable
* @alias trigger
* @param {String} eventName Event name to fire
* @param {Object} [options] Options object
* @return {Self} thisArg
* @chainable
*/
function fire(eventName, options) {
if (!this.__eventListeners) {
return this;
}
var listenersForEvent = this.__eventListeners[eventName];
if (!listenersForEvent) {
return this;
}
for (var i = 0, len = listenersForEvent.length; i < len; i++) {
listenersForEvent[i] && listenersForEvent[i].call(this, options || { });
}
this.__eventListeners[eventName] = listenersForEvent.filter(function(value) {
return value !== false;
});
return this;
}
/**
* @namespace fabric.Observable
* @tutorial {@link http://fabricjs.com/fabric-intro-part-2#events}
* @see {@link http://fabricjs.com/events|Events demo}
*/
fabric.Observable = {
observe: observe,
stopObserving: stopObserving,
fire: fire,
on: observe,
off: stopObserving,
trigger: fire
};
})();
/**
* @namespace fabric.Collection
*/
fabric.Collection = {
_objects: [],
/**
* Adds objects to collection, Canvas or Group, then renders canvas
* (if `renderOnAddRemove` is not `false`).
* in case of Group no changes to bounding box are made.
* Objects should be instances of (or inherit from) fabric.Object
* Use of this function is highly discouraged for groups.
* you can add a bunch of objects with the add method but then you NEED
* to run a addWithUpdate call for the Group class or position/bbox will be wrong.
* @param {...fabric.Object} object Zero or more fabric instances
* @return {Self} thisArg
* @chainable
*/
add: function () {
this._objects.push.apply(this._objects, arguments);
if (this._onObjectAdded) {
for (var i = 0, length = arguments.length; i < length; i++) {
this._onObjectAdded(arguments[i]);
}
}
this.renderOnAddRemove && this.requestRenderAll();
return this;
},
/**
* Inserts an object into collection at specified index, then renders canvas (if `renderOnAddRemove` is not `false`)
* An object should be an instance of (or inherit from) fabric.Object
* Use of this function is highly discouraged for groups.
* you can add a bunch of objects with the insertAt method but then you NEED
* to run a addWithUpdate call for the Group class or position/bbox will be wrong.
* @param {Object} object Object to insert
* @param {Number} index Index to insert object at
* @param {Boolean} nonSplicing When `true`, no splicing (shifting) of objects occurs
* @return {Self} thisArg
* @chainable
*/
insertAt: function (object, index, nonSplicing) {
var objects = this._objects;
if (nonSplicing) {
objects[index] = object;
}
else {
objects.splice(index, 0, object);
}
this._onObjectAdded && this._onObjectAdded(object);
this.renderOnAddRemove && this.requestRenderAll();
return this;
},
/**
* Removes objects from a collection, then renders canvas (if `renderOnAddRemove` is not `false`)
* @param {...fabric.Object} object Zero or more fabric instances
* @return {Self} thisArg
* @chainable
*/
remove: function() {
var objects = this._objects,
index, somethingRemoved = false;
for (var i = 0, length = arguments.length; i < length; i++) {
index = objects.indexOf(arguments[i]);
// only call onObjectRemoved if an object was actually removed
if (index !== -1) {
somethingRemoved = true;
objects.splice(index, 1);
this._onObjectRemoved && this._onObjectRemoved(arguments[i]);
}
}
this.renderOnAddRemove && somethingRemoved && this.requestRenderAll();
return this;
},
/**
* Executes given function for each object in this group
* @param {Function} callback
* Callback invoked with current object as first argument,
* index - as second and an array of all objects - as third.
* Callback is invoked in a context of Global Object (e.g. `window`)
* when no `context` argument is given
*
* @param {Object} context Context (aka thisObject)
* @return {Self} thisArg
* @chainable
*/
forEachObject: function(callback, context) {
var objects = this.getObjects();
for (var i = 0, len = objects.length; i < len; i++) {
callback.call(context, objects[i], i, objects);
}
return this;
},
/**
* Returns an array of children objects of this instance
* Type parameter introduced in 1.3.10
* since 2.3.5 this method return always a COPY of the array;
* @param {String} [type] When specified, only objects of this type are returned
* @return {Array}
*/
getObjects: function(type) {
if (typeof type === 'undefined') {
return this._objects.concat();
}
return this._objects.filter(function(o) {
return o.type === type;
});
},
/**
* Returns object at specified index
* @param {Number} index
* @return {Self} thisArg
*/
item: function (index) {
return this._objects[index];
},
/**
* Returns true if collection contains no objects
* @return {Boolean} true if collection is empty
*/
isEmpty: function () {
return this._objects.length === 0;
},
/**
* Returns a size of a collection (i.e: length of an array containing its objects)
* @return {Number} Collection size
*/
size: function() {
return this._objects.length;
},
/**
* Returns true if collection contains an object
* @param {Object} object Object to check against
* @return {Boolean} `true` if collection contains an object
*/
contains: function(object) {
return this._objects.indexOf(object) > -1;
},
/**
* Returns number representation of a collection complexity
* @return {Number} complexity
*/
complexity: function () {
return this._objects.reduce(function (memo, current) {
memo += current.complexity ? current.complexity() : 0;
return memo;
}, 0);
}
};
/**
* @namespace fabric.CommonMethods
*/
fabric.CommonMethods = {
/**
* Sets object's properties from options
* @param {Object} [options] Options object
*/
_setOptions: function(options) {
for (var prop in options) {
this.set(prop, options[prop]);
}
},
/**
* @private
* @param {Object} [filler] Options object
* @param {String} [property] property to set the Gradient to
*/
_initGradient: function(filler, property) {
if (filler && filler.colorStops && !(filler instanceof fabric.Gradient)) {
this.set(property, new fabric.Gradient(filler));
}
},
/**
* @private
* @param {Object} [filler] Options object
* @param {String} [property] property to set the Pattern to
* @param {Function} [callback] callback to invoke after pattern load
*/
_initPattern: function(filler, property, callback) {
if (filler && filler.source && !(filler instanceof fabric.Pattern)) {
this.set(property, new fabric.Pattern(filler, callback));
}
else {
callback && callback();
}
},
/**
* @private
* @param {Object} [options] Options object
*/
_initClipping: function(options) {
if (!options.clipTo || typeof options.clipTo !== 'string') {
return;
}
var functionBody = fabric.util.getFunctionBody(options.clipTo);
if (typeof functionBody !== 'undefined') {
this.clipTo = new Function('ctx', functionBody);
}
},
/**
* @private
*/
_setObject: function(obj) {
for (var prop in obj) {
this._set(prop, obj[prop]);
}
},
/**
* Sets property to a given value. When changing position/dimension -related properties (left, top, scale, angle, etc.) `set` does not update position of object's borders/controls. If you need to update those, call `setCoords()`.
* @param {String|Object} key Property name or object (if object, iterate over the object properties)
* @param {Object|Function} value Property value (if function, the value is passed into it and its return value is used as a new one)
* @return {fabric.Object} thisArg
* @chainable
*/
set: function(key, value) {
if (typeof key === 'object') {
this._setObject(key);
}
else {
if (typeof value === 'function' && key !== 'clipTo') {
this._set(key, value(this.get(key)));
}
else {
this._set(key, value);
}
}
return this;
},
_set: function(key, value) {
this[key] = value;
},
/**
* Toggles specified property from `true` to `false` or from `false` to `true`
* @param {String} property Property to toggle
* @return {fabric.Object} thisArg
* @chainable
*/
toggle: function(property) {
var value = this.get(property);
if (typeof value === 'boolean') {
this.set(property, !value);
}
return this;
},
/**
* Basic getter
* @param {String} property Property name
* @return {*} value of a property
*/
get: function(property) {
return this[property];
}
};
(function(global) {
var sqrt = Math.sqrt,
atan2 = Math.atan2,
pow = Math.pow,
PiBy180 = Math.PI / 180,
PiBy2 = Math.PI / 2;
/**
* @namespace fabric.util
*/
fabric.util = {
/**
* Calculate the cos of an angle, avoiding returning floats for known results
* @static
* @memberOf fabric.util
* @param {Number} angle the angle in radians or in degree
* @return {Number}
*/
cos: function(angle) {
if (angle === 0) { return 1; }
if (angle < 0) {
// cos(a) = cos(-a)
angle = -angle;
}
var angleSlice = angle / PiBy2;
switch (angleSlice) {
case 1: case 3: return 0;
case 2: return -1;
}
return Math.cos(angle);
},
/**
* Calculate the sin of an angle, avoiding returning floats for known results
* @static
* @memberOf fabric.util
* @param {Number} angle the angle in radians or in degree
* @return {Number}
*/
sin: function(angle) {
if (angle === 0) { return 0; }
var angleSlice = angle / PiBy2, sign = 1;
if (angle < 0) {
// sin(-a) = -sin(a)
sign = -1;
}
switch (angleSlice) {
case 1: return sign;
case 2: return 0;
case 3: return -sign;
}
return Math.sin(angle);
},
/**
* Removes value from an array.
* Presence of value (and its position in an array) is determined via `Array.prototype.indexOf`
* @static
* @memberOf fabric.util
* @param {Array} array
* @param {*} value
* @return {Array} original array
*/
removeFromArray: function(array, value) {
var idx = array.indexOf(value);
if (idx !== -1) {
array.splice(idx, 1);
}
return array;
},
/**
* Returns random number between 2 specified ones.
* @static
* @memberOf fabric.util
* @param {Number} min lower limit
* @param {Number} max upper limit
* @return {Number} random value (between min and max)
*/
getRandomInt: function(min, max) {
return Math.floor(Math.random() * (max - min + 1)) + min;
},
/**
* Transforms degrees to radians.
* @static
* @memberOf fabric.util
* @param {Number} degrees value in degrees
* @return {Number} value in radians
*/
degreesToRadians: function(degrees) {
return degrees * PiBy180;
},
/**
* Transforms radians to degrees.
* @static
* @memberOf fabric.util
* @param {Number} radians value in radians
* @return {Number} value in degrees
*/
radiansToDegrees: function(radians) {
return radians / PiBy180;
},
/**
* Rotates `point` around `origin` with `radians`
* @static
* @memberOf fabric.util
* @param {fabric.Point} point The point to rotate
* @param {fabric.Point} origin The origin of the rotation
* @param {Number} radians The radians of the angle for the rotation
* @return {fabric.Point} The new rotated point
*/
rotatePoint: function(point, origin, radians) {
point.subtractEquals(origin);
var v = fabric.util.rotateVector(point, radians);
return new fabric.Point(v.x, v.y).addEquals(origin);
},
/**
* Rotates `vector` with `radians`
* @static
* @memberOf fabric.util
* @param {Object} vector The vector to rotate (x and y)
* @param {Number} radians The radians of the angle for the rotation
* @return {Object} The new rotated point
*/
rotateVector: function(vector, radians) {
var sin = fabric.util.sin(radians),
cos = fabric.util.cos(radians),
rx = vector.x * cos - vector.y * sin,
ry = vector.x * sin + vector.y * cos;
return {
x: rx,
y: ry
};
},
/**
* Apply transform t to point p
* @static
* @memberOf fabric.util
* @param {fabric.Point} p The point to transform
* @param {Array} t The transform
* @param {Boolean} [ignoreOffset] Indicates that the offset should not be applied
* @return {fabric.Point} The transformed point
*/
transformPoint: function(p, t, ignoreOffset) {
if (ignoreOffset) {
return new fabric.Point(
t[0] * p.x + t[2] * p.y,
t[1] * p.x + t[3] * p.y
);
}
return new fabric.Point(
t[0] * p.x + t[2] * p.y + t[4],
t[1] * p.x + t[3] * p.y + t[5]
);
},
/**
* Returns coordinates of points's bounding rectangle (left, top, width, height)
* @param {Array} points 4 points array
* @param {Array} [transform] an array of 6 numbers representing a 2x3 transform matrix
* @return {Object} Object with left, top, width, height properties
*/
makeBoundingBoxFromPoints: function(points, transform) {
if (transform) {
for (var i = 0; i < points.length; i++) {
points[i] = fabric.util.transformPoint(points[i], transform);
}
}
var xPoints = [points[0].x, points[1].x, points[2].x, points[3].x],
minX = fabric.util.array.min(xPoints),
maxX = fabric.util.array.max(xPoints),
width = maxX - minX,
yPoints = [points[0].y, points[1].y, points[2].y, points[3].y],
minY = fabric.util.array.min(yPoints),
maxY = fabric.util.array.max(yPoints),
height = maxY - minY;
return {
left: minX,
top: minY,
width: width,
height: height
};
},
/**
* Invert transformation t
* @static
* @memberOf fabric.util
* @param {Array} t The transform
* @return {Array} The inverted transform
*/
invertTransform: function(t) {
var a = 1 / (t[0] * t[3] - t[1] * t[2]),
r = [a * t[3], -a * t[1], -a * t[2], a * t[0]],
o = fabric.util.transformPoint({ x: t[4], y: t[5] }, r, true);
r[4] = -o.x;
r[5] = -o.y;
return r;
},
/**
* A wrapper around Number#toFixed, which contrary to native method returns number, not string.
* @static
* @memberOf fabric.util
* @param {Number|String} number number to operate on
* @param {Number} fractionDigits number of fraction digits to "leave"
* @return {Number}
*/
toFixed: function(number, fractionDigits) {
return parseFloat(Number(number).toFixed(fractionDigits));
},
/**
* Converts from attribute value to pixel value if applicable.
* Returns converted pixels or original value not converted.
* @param {Number|String} value number to operate on
* @param {Number} fontSize
* @return {Number|String}
*/
parseUnit: function(value, fontSize) {
var unit = /\D{0,2}$/.exec(value),
number = parseFloat(value);
if (!fontSize) {
fontSize = fabric.Text.DEFAULT_SVG_FONT_SIZE;
}
switch (unit[0]) {
case 'mm':
return number * fabric.DPI / 25.4;
case 'cm':
return number * fabric.DPI / 2.54;
case 'in':
return number * fabric.DPI;
case 'pt':
return number * fabric.DPI / 72; // or * 4 / 3
case 'pc':
return number * fabric.DPI / 72 * 12; // or * 16
case 'em':
return number * fontSize;
default:
return number;
}
},
/**
* Function which always returns `false`.
* @static
* @memberOf fabric.util
* @return {Boolean}
*/
falseFunction: function() {
return false;
},
/**
* Returns klass "Class" object of given namespace
* @memberOf fabric.util
* @param {String} type Type of object (eg. 'circle')
* @param {String} namespace Namespace to get klass "Class" object from
* @return {Object} klass "Class"
*/
getKlass: function(type, namespace) {
// capitalize first letter only
type = fabric.util.string.camelize(type.charAt(0).toUpperCase() + type.slice(1));
return fabric.util.resolveNamespace(namespace)[type];
},
/**
* Returns array of attributes for given svg that fabric parses
* @memberOf fabric.util
* @param {String} type Type of svg element (eg. 'circle')
* @return {Array} string names of supported attributes
*/
getSvgAttributes: function(type) {
var attributes = [
'instantiated_by_use',
'style',
'id',
'class'
];
switch (type) {
case 'linearGradient':
attributes = attributes.concat(['x1', 'y1', 'x2', 'y2', 'gradientUnits', 'gradientTransform']);
break;
case 'radialGradient':
attributes = attributes.concat(['gradientUnits', 'gradientTransform', 'cx', 'cy', 'r', 'fx', 'fy', 'fr']);
break;
case 'stop':
attributes = attributes.concat(['offset', 'stop-color', 'stop-opacity']);
break;
}
return attributes;
},
/**
* Returns object of given namespace
* @memberOf fabric.util
* @param {String} namespace Namespace string e.g. 'fabric.Image.filter' or 'fabric'
* @return {Object} Object for given namespace (default fabric)
*/
resolveNamespace: function(namespace) {
if (!namespace) {
return fabric;
}
var parts = namespace.split('.'),
len = parts.length, i,
obj = global || fabric.window;
for (i = 0; i < len; ++i) {
obj = obj[parts[i]];
}
return obj;
},
/**
* Loads image element from given url and passes it to a callback
* @memberOf fabric.util
* @param {String} url URL representing an image
* @param {Function} callback Callback; invoked with loaded image
* @param {*} [context] Context to invoke callback in
* @param {Object} [crossOrigin] crossOrigin value to set image element to
*/
loadImage: function(url, callback, context, crossOrigin) {
if (!url) {
callback && callback.call(context, url);
return;
}
var img = fabric.util.createImage();
/** @ignore */
var onLoadCallback = function () {
callback && callback.call(context, img);
img = img.onload = img.onerror = null;
};
img.onload = onLoadCallback;
/** @ignore */
img.onerror = function() {
fabric.log('Error loading ' + img.src);
callback && callback.call(context, null, true);
img = img.onload = img.onerror = null;
};
// data-urls appear to be buggy with crossOrigin
// https://github.com/kangax/fabric.js/commit/d0abb90f1cd5c5ef9d2a94d3fb21a22330da3e0a#commitcomment-4513767
// see https://code.google.com/p/chromium/issues/detail?id=315152
// https://bugzilla.mozilla.org/show_bug.cgi?id=935069
if (url.indexOf('data') !== 0 && crossOrigin) {
img.crossOrigin = crossOrigin;
}
// IE10 / IE11-Fix: SVG contents from data: URI
// will only be available if the IMG is present
// in the DOM (and visible)
if (url.substring(0,14) === 'data:image/svg') {
img.onload = null;
fabric.util.loadImageInDom(img, onLoadCallback);
}
img.src = url;
},
/**
* Attaches SVG image with data: URL to the dom
* @memberOf fabric.util
* @param {Object} img Image object with data:image/svg src
* @param {Function} callback Callback; invoked with loaded image
* @return {Object} DOM element (div containing the SVG image)
*/
loadImageInDom: function(img, onLoadCallback) {
var div = fabric.document.createElement('div');
div.style.width = div.style.height = '1px';
div.style.left = div.style.top = '-100%';
div.style.position = 'absolute';
div.appendChild(img);
fabric.document.querySelector('body').appendChild(div);
/**
* Wrap in function to:
* 1. Call existing callback
* 2. Cleanup DOM
*/
img.onload = function () {
onLoadCallback();
div.parentNode.removeChild(div);
div = null;
};
},
/**
* Creates corresponding fabric instances from their object representations
* @static
* @memberOf fabric.util
* @param {Array} objects Objects to enliven
* @param {Function} callback Callback to invoke when all objects are created
* @param {String} namespace Namespace to get klass "Class" object from
* @param {Function} reviver Method for further parsing of object elements,
* called after each fabric object created.
*/
enlivenObjects: function(objects, callback, namespace, reviver) {
objects = objects || [];
var enlivenedObjects = [],
numLoadedObjects = 0,
numTotalObjects = objects.length;
function onLoaded() {
if (++numLoadedObjects === numTotalObjects) {
callback && callback(enlivenedObjects.filter(function(obj) {
// filter out undefined objects (objects that gave error)
return obj;
}));
}
}
if (!numTotalObjects) {
callback && callback(enlivenedObjects);
return;
}
objects.forEach(function (o, index) {
// if sparse array
if (!o || !o.type) {
onLoaded();
return;
}
var klass = fabric.util.getKlass(o.type, namespace);
klass.fromObject(o, function (obj, error) {
error || (enlivenedObjects[index] = obj);
reviver && reviver(o, obj, error);
onLoaded();
});
});
},
/**
* Create and wait for loading of patterns
* @static
* @memberOf fabric.util
* @param {Array} patterns Objects to enliven
* @param {Function} callback Callback to invoke when all objects are created
* called after each fabric object created.
*/
enlivenPatterns: function(patterns, callback) {
patterns = patterns || [];
function onLoaded() {
if (++numLoadedPatterns === numPatterns) {
callback && callback(enlivenedPatterns);
}
}
var enlivenedPatterns = [],
numLoadedPatterns = 0,
numPatterns = patterns.length;
if (!numPatterns) {
callback && callback(enlivenedPatterns);
return;
}
patterns.forEach(function (p, index) {
if (p && p.source) {
new fabric.Pattern(p, function(pattern) {
enlivenedPatterns[index] = pattern;
onLoaded();
});
}
else {
enlivenedPatterns[index] = p;
onLoaded();
}
});
},
/**
* Groups SVG elements (usually those retrieved from SVG document)
* @static
* @memberOf fabric.util
* @param {Array} elements SVG elements to group
* @param {Object} [options] Options object
* @param {String} path Value to set sourcePath to
* @return {fabric.Object|fabric.Group}
*/
groupSVGElements: function(elements, options, path) {
var object;
if (elements && elements.length === 1) {
return elements[0];
}
if (options) {
if (options.width && options.height) {
options.centerPoint = {
x: options.width / 2,
y: options.height / 2
};
}
else {
delete options.width;
delete options.height;
}
}
object = new fabric.Group(elements, options);
if (typeof path !== 'undefined') {
object.sourcePath = path;
}
return object;
},
/**
* Populates an object with properties of another object
* @static
* @memberOf fabric.util
* @param {Object} source Source object
* @param {Object} destination Destination object
* @return {Array} properties Properties names to include
*/
populateWithProperties: function(source, destination, properties) {
if (properties && Object.prototype.toString.call(properties) === '[object Array]') {
for (var i = 0, len = properties.length; i < len; i++) {
if (properties[i] in source) {
destination[properties[i]] = source[properties[i]];
}
}
}
},
/**
* Draws a dashed line between two points
*
* This method is used to draw dashed line around selection area.
* See <a href="http://stackoverflow.com/questions/4576724/dotted-stroke-in-canvas">dotted stroke in canvas</a>
*
* @param {CanvasRenderingContext2D} ctx context
* @param {Number} x start x coordinate
* @param {Number} y start y coordinate
* @param {Number} x2 end x coordinate
* @param {Number} y2 end y coordinate
* @param {Array} da dash array pattern
*/
drawDashedLine: function(ctx, x, y, x2, y2, da) {
var dx = x2 - x,
dy = y2 - y,
len = sqrt(dx * dx + dy * dy),
rot = atan2(dy, dx),
dc = da.length,
di = 0,
draw = true;
ctx.save();
ctx.translate(x, y);
ctx.moveTo(0, 0);
ctx.rotate(rot);
x = 0;
while (len > x) {
x += da[di++ % dc];
if (x > len) {
x = len;
}
ctx[draw ? 'lineTo' : 'moveTo'](x, 0);
draw = !draw;
}
ctx.restore();
},
/**
* Creates canvas element
* @static
* @memberOf fabric.util
* @return {CanvasElement} initialized canvas element
*/
createCanvasElement: function() {
return fabric.document.createElement('canvas');
},
/**
* Creates a canvas element that is a copy of another and is also painted
* @param {CanvasElement} canvas to copy size and content of
* @static
* @memberOf fabric.util
* @return {CanvasElement} initialized canvas element
*/
copyCanvasElement: function(canvas) {
var newCanvas = fabric.util.createCanvasElement();
newCanvas.width = canvas.width;
newCanvas.height = canvas.height;
newCanvas.getContext('2d').drawImage(canvas, 0, 0);
return newCanvas;
},
/**
* since 2.6.0 moved from canvas instance to utility.
* @param {CanvasElement} canvasEl to copy size and content of
* @param {String} format 'jpeg' or 'png', in some browsers 'webp' is ok too
* @param {Number} quality <= 1 and > 0
* @static
* @memberOf fabric.util
* @return {String} data url
*/
toDataURL: function(canvasEl, format, quality) {
return canvasEl.toDataURL('image/' + format, quality);
},
/**
* Creates image element (works on client and node)
* @static
* @memberOf fabric.util
* @return {HTMLImageElement} HTML image element
*/
createImage: function() {
return fabric.document.createElement('img');
},
/**
* @static
* @memberOf fabric.util
* @deprecated since 2.0.0
* @param {fabric.Object} receiver Object implementing `clipTo` method
* @param {CanvasRenderingContext2D} ctx Context to clip
*/
clipContext: function(receiver, ctx) {
ctx.save();
ctx.beginPath();
receiver.clipTo(ctx);
ctx.clip();
},
/**
* Multiply matrix A by matrix B to nest transformations
* @static
* @memberOf fabric.util
* @param {Array} a First transformMatrix
* @param {Array} b Second transformMatrix
* @param {Boolean} is2x2 flag to multiply matrices as 2x2 matrices
* @return {Array} The product of the two transform matrices
*/
multiplyTransformMatrices: function(a, b, is2x2) {
// Matrix multiply a * b
return [
a[0] * b[0] + a[2] * b[1],
a[1] * b[0] + a[3] * b[1],
a[0] * b[2] + a[2] * b[3],
a[1] * b[2] + a[3] * b[3],
is2x2 ? 0 : a[0] * b[4] + a[2] * b[5] + a[4],
is2x2 ? 0 : a[1] * b[4] + a[3] * b[5] + a[5]
];
},
/**
* Decomposes standard 2x3 matrix into transform components
* @static
* @memberOf fabric.util
* @param {Array} a transformMatrix
* @return {Object} Components of transform
*/
qrDecompose: function(a) {
var angle = atan2(a[1], a[0]),
denom = pow(a[0], 2) + pow(a[1], 2),
scaleX = sqrt(denom),
scaleY = (a[0] * a[3] - a[2] * a [1]) / scaleX,
skewX = atan2(a[0] * a[2] + a[1] * a [3], denom);
return {
angle: angle / PiBy180,
scaleX: scaleX,
scaleY: scaleY,
skewX: skewX / PiBy180,
skewY: 0,
translateX: a[4],
translateY: a[5]
};
},
/**
* Returns a transform matrix starting from an object of the same kind of
* the one returned from qrDecompose, useful also if you want to calculate some
* transformations from an object that is not enlived yet
* @static
* @memberOf fabric.util
* @param {Object} options
* @param {Number} [options.angle] angle in degrees
* @return {Array[Number]} transform matrix
*/
calcRotateMatrix: function(options) {
if (!options.angle) {
return fabric.iMatrix.concat();
}
var theta = fabric.util.degreesToRadians(options.angle),
cos = fabric.util.cos(theta),
sin = fabric.util.sin(theta);
return [cos, sin, -sin, cos, 0, 0];
},
/**
* Returns a transform matrix starting from an object of the same kind of
* the one returned from qrDecompose, useful also if you want to calculate some
* transformations from an object that is not enlived yet.
* is called DimensionsTransformMatrix because those properties are the one that influence
* the size of the resulting box of the object.
* @static
* @memberOf fabric.util
* @param {Object} options
* @param {Number} [options.scaleX]
* @param {Number} [options.scaleY]
* @param {Boolean} [options.flipX]
* @param {Boolean} [options.flipY]
* @param {Number} [options.skewX]
* @param {Number} [options.skewX]
* @return {Array[Number]} transform matrix
*/
calcDimensionsMatrix: function(options) {
var scaleX = typeof options.scaleX === 'undefined' ? 1 : options.scaleX,
scaleY = typeof options.scaleY === 'undefined' ? 1 : options.scaleY,
scaleMatrix = [
options.flipX ? -scaleX : scaleX,
0,
0,
options.flipY ? -scaleY : scaleY,
0,
0],
multiply = fabric.util.multiplyTransformMatrices,
degreesToRadians = fabric.util.degreesToRadians;
if (options.skewX) {
scaleMatrix = multiply(
scaleMatrix,
[1, 0, Math.tan(degreesToRadians(options.skewX)), 1],
true);
}
if (options.skewY) {
scaleMatrix = multiply(
scaleMatrix,
[1, Math.tan(degreesToRadians(options.skewY)), 0, 1],
true);
}
return scaleMatrix;
},
/**
* Returns a transform matrix starting from an object of the same kind of
* the one returned from qrDecompose, useful also if you want to calculate some
* transformations from an object that is not enlived yet
* @static
* @memberOf fabric.util
* @param {Object} options
* @param {Number} [options.angle]
* @param {Number} [options.scaleX]
* @param {Number} [options.scaleY]
* @param {Boolean} [options.flipX]
* @param {Boolean} [options.flipY]
* @param {Number} [options.skewX]
* @param {Number} [options.skewX]
* @param {Number} [options.translateX]
* @param {Number} [options.translateY]
* @return {Array[Number]} transform matrix
*/
composeMatrix: function(options) {
var matrix = [1, 0, 0, 1, options.translateX || 0, options.translateY || 0],
multiply = fabric.util.multiplyTransformMatrices;
if (options.angle) {
matrix = multiply(matrix, fabric.util.calcRotateMatrix(options));
}
if (options.scaleX || options.scaleY || options.skewX || options.skewY || options.flipX || options.flipY) {
matrix = multiply(matrix, fabric.util.calcDimensionsMatrix(options));
}
return matrix;
},
/**
* Returns a transform matrix that has the same effect of scaleX, scaleY and skewX.
* Is deprecated for composeMatrix. Please do not use it.
* @static
* @deprecated since 3.4.0
* @memberOf fabric.util
* @param {Number} scaleX
* @param {Number} scaleY
* @param {Number} skewX
* @return {Array[Number]} transform matrix
*/
customTransformMatrix: function(scaleX, scaleY, skewX) {
return fabric.util.composeMatrix({ scaleX: scaleX, scaleY: scaleY, skewX: skewX });
},
/**
* reset an object transform state to neutral. Top and left are not accounted for
* @static
* @memberOf fabric.util
* @param {fabric.Object} target object to transform
*/
resetObjectTransform: function (target) {
target.scaleX = 1;
target.scaleY = 1;
target.skewX = 0;
target.skewY = 0;
target.flipX = false;
target.flipY = false;
target.rotate(0);
},
/**
* Extract Object transform values
* @static
* @memberOf fabric.util
* @param {fabric.Object} target object to read from
* @return {Object} Components of transform
*/
saveObjectTransform: function (target) {
return {
scaleX: target.scaleX,
scaleY: target.scaleY,
skewX: target.skewX,
skewY: target.skewY,
angle: target.angle,
left: target.left,
flipX: target.flipX,
flipY: target.flipY,
top: target.top
};
},
/**
* Returns string representation of function body
* @param {Function} fn Function to get body of
* @return {String} Function body
*/
getFunctionBody: function(fn) {
return (String(fn).match(/function[^{]*\{([\s\S]*)\}/) || {})[1];
},
/**
* Returns true if context has transparent pixel
* at specified location (taking tolerance into account)
* @param {CanvasRenderingContext2D} ctx context
* @param {Number} x x coordinate
* @param {Number} y y coordinate
* @param {Number} tolerance Tolerance
*/
isTransparent: function(ctx, x, y, tolerance) {
// If tolerance is > 0 adjust start coords to take into account.
// If moves off Canvas fix to 0
if (tolerance > 0) {
if (x > tolerance) {
x -= tolerance;
}
else {
x = 0;
}
if (y > tolerance) {
y -= tolerance;
}
else {
y = 0;
}
}
var _isTransparent = true, i, temp,
imageData = ctx.getImageData(x, y, (tolerance * 2) || 1, (tolerance * 2) || 1),
l = imageData.data.length;
// Split image data - for tolerance > 1, pixelDataSize = 4;
for (i = 3; i < l; i += 4) {
temp = imageData.data[i];
_isTransparent = temp <= 0;
if (_isTransparent === false) {
break; // Stop if colour found
}
}
imageData = null;
return _isTransparent;
},
/**
* Parse preserveAspectRatio attribute from element
* @param {string} attribute to be parsed
* @return {Object} an object containing align and meetOrSlice attribute
*/
parsePreserveAspectRatioAttribute: function(attribute) {
var meetOrSlice = 'meet', alignX = 'Mid', alignY = 'Mid',
aspectRatioAttrs = attribute.split(' '), align;
if (aspectRatioAttrs && aspectRatioAttrs.length) {
meetOrSlice = aspectRatioAttrs.pop();
if (meetOrSlice !== 'meet' && meetOrSlice !== 'slice') {
align = meetOrSlice;
meetOrSlice = 'meet';
}
else if (aspectRatioAttrs.length) {
align = aspectRatioAttrs.pop();
}
}
//divide align in alignX and alignY
alignX = align !== 'none' ? align.slice(1, 4) : 'none';
alignY = align !== 'none' ? align.slice(5, 8) : 'none';
return {
meetOrSlice: meetOrSlice,
alignX: alignX,
alignY: alignY
};
},
/**
* Clear char widths cache for the given font family or all the cache if no
* fontFamily is specified.
* Use it if you know you are loading fonts in a lazy way and you are not waiting
* for custom fonts to load properly when adding text objects to the canvas.
* If a text object is added when its own font is not loaded yet, you will get wrong
* measurement and so wrong bounding boxes.
* After the font cache is cleared, either change the textObject text content or call
* initDimensions() to trigger a recalculation
* @memberOf fabric.util
* @param {String} [fontFamily] font family to clear
*/
clearFabricFontCache: function(fontFamily) {
fontFamily = (fontFamily || '').toLowerCase();
if (!fontFamily) {
fabric.charWidthsCache = { };
}
else if (fabric.charWidthsCache[fontFamily]) {
delete fabric.charWidthsCache[fontFamily];
}
},
/**
* Given current aspect ratio, determines the max width and height that can
* respect the total allowed area for the cache.
* @memberOf fabric.util
* @param {Number} ar aspect ratio
* @param {Number} maximumArea Maximum area you want to achieve
* @return {Object.x} Limited dimensions by X
* @return {Object.y} Limited dimensions by Y
*/
limitDimsByArea: function(ar, maximumArea) {
var roughWidth = Math.sqrt(maximumArea * ar),
perfLimitSizeY = Math.floor(maximumArea / roughWidth);
return { x: Math.floor(roughWidth), y: perfLimitSizeY };
},
capValue: function(min, value, max) {
return Math.max(min, Math.min(value, max));
},
findScaleToFit: function(source, destination) {
return Math.min(destination.width / source.width, destination.height / source.height);
},
findScaleToCover: function(source, destination) {
return Math.max(destination.width / source.width, destination.height / source.height);
},
/**
* given an array of 6 number returns something like `"matrix(...numbers)"`
* @memberOf fabric.util
* @param {Array} trasnform an array with 6 numbers
* @return {String} transform matrix for svg
* @return {Object.y} Limited dimensions by Y
*/
matrixToSVG: function(transform) {
return 'matrix(' + transform.map(function(value) {
return fabric.util.toFixed(value, fabric.Object.NUM_FRACTION_DIGITS);
}).join(' ') + ')';
}
};
})(typeof exports !== 'undefined' ? exports : this);
(function() {
var _join = Array.prototype.join;
/* Adapted from http://dxr.mozilla.org/mozilla-central/source/content/svg/content/src/nsSVGPathDataParser.cpp
* by Andrea Bogazzi code is under MPL. if you don't have a copy of the license you can take it here
* http://mozilla.org/MPL/2.0/
*/
function arcToSegments(toX, toY, rx, ry, large, sweep, rotateX) {
var argsString = _join.call(arguments);
if (fabric.arcToSegmentsCache[argsString]) {
return fabric.arcToSegmentsCache[argsString];
}
var PI = Math.PI, th = rotateX * PI / 180,
sinTh = fabric.util.sin(th),
cosTh = fabric.util.cos(th),
fromX = 0, fromY = 0;
rx = Math.abs(rx);
ry = Math.abs(ry);
var px = -cosTh * toX * 0.5 - sinTh * toY * 0.5,
py = -cosTh * toY * 0.5 + sinTh * toX * 0.5,
rx2 = rx * rx, ry2 = ry * ry, py2 = py * py, px2 = px * px,
pl = rx2 * ry2 - rx2 * py2 - ry2 * px2,
root = 0;
if (pl < 0) {
var s = Math.sqrt(1 - pl / (rx2 * ry2));
rx *= s;
ry *= s;
}
else {
root = (large === sweep ? -1.0 : 1.0) *
Math.sqrt( pl / (rx2 * py2 + ry2 * px2));
}
var cx = root * rx * py / ry,
cy = -root * ry * px / rx,
cx1 = cosTh * cx - sinTh * cy + toX * 0.5,
cy1 = sinTh * cx + cosTh * cy + toY * 0.5,
mTheta = calcVectorAngle(1, 0, (px - cx) / rx, (py - cy) / ry),
dtheta = calcVectorAngle((px - cx) / rx, (py - cy) / ry, (-px - cx) / rx, (-py - cy) / ry);
if (sweep === 0 && dtheta > 0) {
dtheta -= 2 * PI;
}
else if (sweep === 1 && dtheta < 0) {
dtheta += 2 * PI;
}
// Convert into cubic bezier segments <= 90deg
var segments = Math.ceil(Math.abs(dtheta / PI * 2)),
result = [], mDelta = dtheta / segments,
mT = 8 / 3 * Math.sin(mDelta / 4) * Math.sin(mDelta / 4) / Math.sin(mDelta / 2),
th3 = mTheta + mDelta;
for (var i = 0; i < segments; i++) {
result[i] = segmentToBezier(mTheta, th3, cosTh, sinTh, rx, ry, cx1, cy1, mT, fromX, fromY);
fromX = result[i][4];
fromY = result[i][5];
mTheta = th3;
th3 += mDelta;
}
fabric.arcToSegmentsCache[argsString] = result;
return result;
}
function segmentToBezier(th2, th3, cosTh, sinTh, rx, ry, cx1, cy1, mT, fromX, fromY) {
var costh2 = fabric.util.cos(th2),
sinth2 = fabric.util.sin(th2),
costh3 = fabric.util.cos(th3),
sinth3 = fabric.util.sin(th3),
toX = cosTh * rx * costh3 - sinTh * ry * sinth3 + cx1,
toY = sinTh * rx * costh3 + cosTh * ry * sinth3 + cy1,
cp1X = fromX + mT * ( -cosTh * rx * sinth2 - sinTh * ry * costh2),
cp1Y = fromY + mT * ( -sinTh * rx * sinth2 + cosTh * ry * costh2),
cp2X = toX + mT * ( cosTh * rx * sinth3 + sinTh * ry * costh3),
cp2Y = toY + mT * ( sinTh * rx * sinth3 - cosTh * ry * costh3);
return [
cp1X, cp1Y,
cp2X, cp2Y,
toX, toY
];
}
/*
* Private
*/
function calcVectorAngle(ux, uy, vx, vy) {
var ta = Math.atan2(uy, ux),
tb = Math.atan2(vy, vx);
if (tb >= ta) {
return tb - ta;
}
else {
return 2 * Math.PI - (ta - tb);
}
}
/**
* Draws arc
* @param {CanvasRenderingContext2D} ctx
* @param {Number} fx
* @param {Number} fy
* @param {Array} coords
*/
fabric.util.drawArc = function(ctx, fx, fy, coords) {
var rx = coords[0],
ry = coords[1],
rot = coords[2],
large = coords[3],
sweep = coords[4],
tx = coords[5],
ty = coords[6],
segs = [[], [], [], []],
segsNorm = arcToSegments(tx - fx, ty - fy, rx, ry, large, sweep, rot);
for (var i = 0, len = segsNorm.length; i < len; i++) {
segs[i][0] = segsNorm[i][0] + fx;
segs[i][1] = segsNorm[i][1] + fy;
segs[i][2] = segsNorm[i][2] + fx;
segs[i][3] = segsNorm[i][3] + fy;
segs[i][4] = segsNorm[i][4] + fx;
segs[i][5] = segsNorm[i][5] + fy;
ctx.bezierCurveTo.apply(ctx, segs[i]);
}
};
/**
* Calculate bounding box of a elliptic-arc
* @param {Number} fx start point of arc
* @param {Number} fy
* @param {Number} rx horizontal radius
* @param {Number} ry vertical radius
* @param {Number} rot angle of horizontal axe
* @param {Number} large 1 or 0, whatever the arc is the big or the small on the 2 points
* @param {Number} sweep 1 or 0, 1 clockwise or counterclockwise direction
* @param {Number} tx end point of arc
* @param {Number} ty
*/
fabric.util.getBoundsOfArc = function(fx, fy, rx, ry, rot, large, sweep, tx, ty) {
var fromX = 0, fromY = 0, bound, bounds = [],
segs = arcToSegments(tx - fx, ty - fy, rx, ry, large, sweep, rot);
for (var i = 0, len = segs.length; i < len; i++) {
bound = getBoundsOfCurve(fromX, fromY, segs[i][0], segs[i][1], segs[i][2], segs[i][3], segs[i][4], segs[i][5]);
bounds.push({ x: bound[0].x + fx, y: bound[0].y + fy });
bounds.push({ x: bound[1].x + fx, y: bound[1].y + fy });
fromX = segs[i][4];
fromY = segs[i][5];
}
return bounds;
};
/**
* Calculate bounding box of a beziercurve
* @param {Number} x0 starting point
* @param {Number} y0
* @param {Number} x1 first control point
* @param {Number} y1
* @param {Number} x2 secondo control point
* @param {Number} y2
* @param {Number} x3 end of beizer
* @param {Number} y3
*/
// taken from http://jsbin.com/ivomiq/56/edit no credits available for that.
function getBoundsOfCurve(x0, y0, x1, y1, x2, y2, x3, y3) {
var argsString;
if (fabric.cachesBoundsOfCurve) {
argsString = _join.call(arguments);
if (fabric.boundsOfCurveCache[argsString]) {
return fabric.boundsOfCurveCache[argsString];
}
}
var sqrt = Math.sqrt,
min = Math.min, max = Math.max,
abs = Math.abs, tvalues = [],
bounds = [[], []],
a, b, c, t, t1, t2, b2ac, sqrtb2ac;
b = 6 * x0 - 12 * x1 + 6 * x2;
a = -3 * x0 + 9 * x1 - 9 * x2 + 3 * x3;
c = 3 * x1 - 3 * x0;
for (var i = 0; i < 2; ++i) {
if (i > 0) {
b = 6 * y0 - 12 * y1 + 6 * y2;
a = -3 * y0 + 9 * y1 - 9 * y2 + 3 * y3;
c = 3 * y1 - 3 * y0;
}
if (abs(a) < 1e-12) {
if (abs(b) < 1e-12) {
continue;
}
t = -c / b;
if (0 < t && t < 1) {
tvalues.push(t);
}
continue;
}
b2ac = b * b - 4 * c * a;
if (b2ac < 0) {
continue;
}
sqrtb2ac = sqrt(b2ac);
t1 = (-b + sqrtb2ac) / (2 * a);
if (0 < t1 && t1 < 1) {
tvalues.push(t1);
}
t2 = (-b - sqrtb2ac) / (2 * a);
if (0 < t2 && t2 < 1) {
tvalues.push(t2);
}
}
var x, y, j = tvalues.length, jlen = j, mt;
while (j--) {
t = tvalues[j];
mt = 1 - t;
x = (mt * mt * mt * x0) + (3 * mt * mt * t * x1) + (3 * mt * t * t * x2) + (t * t * t * x3);
bounds[0][j] = x;
y = (mt * mt * mt * y0) + (3 * mt * mt * t * y1) + (3 * mt * t * t * y2) + (t * t * t * y3);
bounds[1][j] = y;
}
bounds[0][jlen] = x0;
bounds[1][jlen] = y0;
bounds[0][jlen + 1] = x3;
bounds[1][jlen + 1] = y3;
var result = [
{
x: min.apply(null, bounds[0]),
y: min.apply(null, bounds[1])
},
{
x: max.apply(null, bounds[0]),
y: max.apply(null, bounds[1])
}
];
if (fabric.cachesBoundsOfCurve) {
fabric.boundsOfCurveCache[argsString] = result;
}
return result;
}
fabric.util.getBoundsOfCurve = getBoundsOfCurve;
})();
(function() {
var slice = Array.prototype.slice;
/**
* Invokes method on all items in a given array
* @memberOf fabric.util.array
* @param {Array} array Array to iterate over
* @param {String} method Name of a method to invoke
* @return {Array}
*/
function invoke(array, method) {
var args = slice.call(arguments, 2), result = [];
for (var i = 0, len = array.length; i < len; i++) {
result[i] = args.length ? array[i][method].apply(array[i], args) : array[i][method].call(array[i]);
}
return result;
}
/**
* Finds maximum value in array (not necessarily "first" one)
* @memberOf fabric.util.array
* @param {Array} array Array to iterate over
* @param {String} byProperty
* @return {*}
*/
function max(array, byProperty) {
return find(array, byProperty, function(value1, value2) {
return value1 >= value2;
});
}
/**
* Finds minimum value in array (not necessarily "first" one)
* @memberOf fabric.util.array
* @param {Array} array Array to iterate over
* @param {String} byProperty
* @return {*}
*/
function min(array, byProperty) {
return find(array, byProperty, function(value1, value2) {
return value1 < value2;
});
}
/**
* @private
*/
function fill(array, value) {
var k = array.length;
while (k--) {
array[k] = value;
}
return array;
}
/**
* @private
*/
function find(array, byProperty, condition) {
if (!array || array.length === 0) {
return;
}
var i = array.length - 1,
result = byProperty ? array[i][byProperty] : array[i];
if (byProperty) {
while (i--) {
if (condition(array[i][byProperty], result)) {
result = array[i][byProperty];
}
}
}
else {
while (i--) {
if (condition(array[i], result)) {
result = array[i];
}
}
}
return result;
}
/**
* @namespace fabric.util.array
*/
fabric.util.array = {
fill: fill,
invoke: invoke,
min: min,
max: max
};
})();
(function() {
/**
* Copies all enumerable properties of one js object to another
* this does not and cannot compete with generic utils.
* Does not clone or extend fabric.Object subclasses.
* This is mostly for internal use and has extra handling for fabricJS objects
* it skips the canvas property in deep cloning.
* @memberOf fabric.util.object
* @param {Object} destination Where to copy to
* @param {Object} source Where to copy from
* @return {Object}
*/
function extend(destination, source, deep) {
// JScript DontEnum bug is not taken care of
// the deep clone is for internal use, is not meant to avoid
// javascript traps or cloning html element or self referenced objects.
if (deep) {
if (!fabric.isLikelyNode && source instanceof Element) {
// avoid cloning deep images, canvases,
destination = source;
}
else if (source instanceof Array) {
destination = [];
for (var i = 0, len = source.length; i < len; i++) {
destination[i] = extend({ }, source[i], deep);
}
}
else if (source && typeof source === 'object') {
for (var property in source) {
if (property === 'canvas') {
destination[property] = extend({ }, source[property]);
}
else if (source.hasOwnProperty(property)) {
destination[property] = extend({ }, source[property], deep);
}
}
}
else {
// this sounds odd for an extend but is ok for recursive use
destination = source;
}
}
else {
for (var property in source) {
destination[property] = source[property];
}
}
return destination;
}
/**
* Creates an empty object and copies all enumerable properties of another object to it
* @memberOf fabric.util.object
* TODO: this function return an empty object if you try to clone null
* @param {Object} object Object to clone
* @return {Object}
*/
function clone(object, deep) {
return extend({ }, object, deep);
}
/** @namespace fabric.util.object */
fabric.util.object = {
extend: extend,
clone: clone
};
fabric.util.object.extend(fabric.util, fabric.Observable);
})();
(function() {
/**
* Camelizes a string
* @memberOf fabric.util.string
* @param {String} string String to camelize
* @return {String} Camelized version of a string
*/
function camelize(string) {
return string.replace(/-+(.)?/g, function(match, character) {
return character ? character.toUpperCase() : '';
});
}
/**
* Capitalizes a string
* @memberOf fabric.util.string
* @param {String} string String to capitalize
* @param {Boolean} [firstLetterOnly] If true only first letter is capitalized
* and other letters stay untouched, if false first letter is capitalized
* and other letters are converted to lowercase.
* @return {String} Capitalized version of a string
*/
function capitalize(string, firstLetterOnly) {
return string.charAt(0).toUpperCase() +
(firstLetterOnly ? string.slice(1) : string.slice(1).toLowerCase());
}
/**
* Escapes XML in a string
* @memberOf fabric.util.string
* @param {String} string String to escape
* @return {String} Escaped version of a string
*/
function escapeXml(string) {
return string.replace(/&/g, '&amp;')
.replace(/"/g, '&quot;')
.replace(/'/g, '&apos;')
.replace(/</g, '&lt;')
.replace(/>/g, '&gt;');
}
/**
* Divide a string in the user perceived single units
* @memberOf fabric.util.string
* @param {String} textstring String to escape
* @return {Array} array containing the graphemes
*/
function graphemeSplit(textstring) {
var i = 0, chr, graphemes = [];
for (i = 0, chr; i < textstring.length; i++) {
if ((chr = getWholeChar(textstring, i)) === false) {
continue;
}
graphemes.push(chr);
}
return graphemes;
}
// taken from mdn in the charAt doc page.
function getWholeChar(str, i) {
var code = str.charCodeAt(i);
if (isNaN(code)) {
return ''; // Position not found
}
if (code < 0xD800 || code > 0xDFFF) {
return str.charAt(i);
}
// High surrogate (could change last hex to 0xDB7F to treat high private
// surrogates as single characters)
if (0xD800 <= code && code <= 0xDBFF) {
if (str.length <= (i + 1)) {
throw 'High surrogate without following low surrogate';
}
var next = str.charCodeAt(i + 1);
if (0xDC00 > next || next > 0xDFFF) {
throw 'High surrogate without following low surrogate';
}
return str.charAt(i) + str.charAt(i + 1);
}
// Low surrogate (0xDC00 <= code && code <= 0xDFFF)
if (i === 0) {
throw 'Low surrogate without preceding high surrogate';
}
var prev = str.charCodeAt(i - 1);
// (could change last hex to 0xDB7F to treat high private
// surrogates as single characters)
if (0xD800 > prev || prev > 0xDBFF) {
throw 'Low surrogate without preceding high surrogate';
}
// We can pass over low surrogates now as the second component
// in a pair which we have already processed
return false;
}
/**
* String utilities
* @namespace fabric.util.string
*/
fabric.util.string = {
camelize: camelize,
capitalize: capitalize,
escapeXml: escapeXml,
graphemeSplit: graphemeSplit
};
})();
(function() {
var slice = Array.prototype.slice, emptyFunction = function() { },
IS_DONTENUM_BUGGY = (function() {
for (var p in { toString: 1 }) {
if (p === 'toString') {
return false;
}
}
return true;
})(),
/** @ignore */
addMethods = function(klass, source, parent) {
for (var property in source) {
if (property in klass.prototype &&
typeof klass.prototype[property] === 'function' &&
(source[property] + '').indexOf('callSuper') > -1) {
klass.prototype[property] = (function(property) {
return function() {
var superclass = this.constructor.superclass;
this.constructor.superclass = parent;
var returnValue = source[property].apply(this, arguments);
this.constructor.superclass = superclass;
if (property !== 'initialize') {
return returnValue;
}
};
})(property);
}
else {
klass.prototype[property] = source[property];
}
if (IS_DONTENUM_BUGGY) {
if (source.toString !== Object.prototype.toString) {
klass.prototype.toString = source.toString;
}
if (source.valueOf !== Object.prototype.valueOf) {
klass.prototype.valueOf = source.valueOf;
}
}
}
};
function Subclass() { }
function callSuper(methodName) {
var parentMethod = null,
_this = this;
// climb prototype chain to find method not equal to callee's method
while (_this.constructor.superclass) {
var superClassMethod = _this.constructor.superclass.prototype[methodName];
if (_this[methodName] !== superClassMethod) {
parentMethod = superClassMethod;
break;
}
// eslint-disable-next-line
_this = _this.constructor.superclass.prototype;
}
if (!parentMethod) {
return console.log('tried to callSuper ' + methodName + ', method not found in prototype chain', this);
}
return (arguments.length > 1)
? parentMethod.apply(this, slice.call(arguments, 1))
: parentMethod.call(this);
}
/**
* Helper for creation of "classes".
* @memberOf fabric.util
* @param {Function} [parent] optional "Class" to inherit from
* @param {Object} [properties] Properties shared by all instances of this class
* (be careful modifying objects defined here as this would affect all instances)
*/
function createClass() {
var parent = null,
properties = slice.call(arguments, 0);
if (typeof properties[0] === 'function') {
parent = properties.shift();
}
function klass() {
this.initialize.apply(this, arguments);
}
klass.superclass = parent;
klass.subclasses = [];
if (parent) {
Subclass.prototype = parent.prototype;
klass.prototype = new Subclass();
parent.subclasses.push(klass);
}
for (var i = 0, length = properties.length; i < length; i++) {
addMethods(klass, properties[i], parent);
}
if (!klass.prototype.initialize) {
klass.prototype.initialize = emptyFunction;
}
klass.prototype.constructor = klass;
klass.prototype.callSuper = callSuper;
return klass;
}
fabric.util.createClass = createClass;
})();
(function () {
// since ie10 or ie9 can use addEventListener but they do not support options, i need to check
var couldUseAttachEvent = !!fabric.document.createElement('div').attachEvent;
/**
* Adds an event listener to an element
* @function
* @memberOf fabric.util
* @param {HTMLElement} element
* @param {String} eventName
* @param {Function} handler
*/
fabric.util.addListener = function(element, eventName, handler, options) {
element && element.addEventListener(eventName, handler, couldUseAttachEvent ? false : options);
};
/**
* Removes an event listener from an element
* @function
* @memberOf fabric.util
* @param {HTMLElement} element
* @param {String} eventName
* @param {Function} handler
*/
fabric.util.removeListener = function(element, eventName, handler, options) {
element && element.removeEventListener(eventName, handler, couldUseAttachEvent ? false : options);
};
function getTouchInfo(event) {
var touchProp = event.changedTouches;
if (touchProp && touchProp[0]) {
return touchProp[0];
}
return event;
}
fabric.util.getPointer = function(event) {
var element = event.target,
scroll = fabric.util.getScrollLeftTop(element),
_evt = getTouchInfo(event);
return {
x: _evt.clientX + scroll.left,
y: _evt.clientY + scroll.top
};
};
})();
(function () {
/**
* Cross-browser wrapper for setting element's style
* @memberOf fabric.util
* @param {HTMLElement} element
* @param {Object} styles
* @return {HTMLElement} Element that was passed as a first argument
*/
function setStyle(element, styles) {
var elementStyle = element.style;
if (!elementStyle) {
return element;
}
if (typeof styles === 'string') {
element.style.cssText += ';' + styles;
return styles.indexOf('opacity') > -1
? setOpacity(element, styles.match(/opacity:\s*(\d?\.?\d*)/)[1])
: element;
}
for (var property in styles) {
if (property === 'opacity') {
setOpacity(element, styles[property]);
}
else {
var normalizedProperty = (property === 'float' || property === 'cssFloat')
? (typeof elementStyle.styleFloat === 'undefined' ? 'cssFloat' : 'styleFloat')
: property;
elementStyle[normalizedProperty] = styles[property];
}
}
return element;
}
var parseEl = fabric.document.createElement('div'),
supportsOpacity = typeof parseEl.style.opacity === 'string',
supportsFilters = typeof parseEl.style.filter === 'string',
reOpacity = /alpha\s*\(\s*opacity\s*=\s*([^\)]+)\)/,
/** @ignore */
setOpacity = function (element) { return element; };
if (supportsOpacity) {
/** @ignore */
setOpacity = function(element, value) {
element.style.opacity = value;
return element;
};
}
else if (supportsFilters) {
/** @ignore */
setOpacity = function(element, value) {
var es = element.style;
if (element.currentStyle && !element.currentStyle.hasLayout) {
es.zoom = 1;
}
if (reOpacity.test(es.filter)) {
value = value >= 0.9999 ? '' : ('alpha(opacity=' + (value * 100) + ')');
es.filter = es.filter.replace(reOpacity, value);
}
else {
es.filter += ' alpha(opacity=' + (value * 100) + ')';
}
return element;
};
}
fabric.util.setStyle = setStyle;
})();
(function() {
var _slice = Array.prototype.slice;
/**
* Takes id and returns an element with that id (if one exists in a document)
* @memberOf fabric.util
* @param {String|HTMLElement} id
* @return {HTMLElement|null}
*/
function getById(id) {
return typeof id === 'string' ? fabric.document.getElementById(id) : id;
}
var sliceCanConvertNodelists,
/**
* Converts an array-like object (e.g. arguments or NodeList) to an array
* @memberOf fabric.util
* @param {Object} arrayLike
* @return {Array}
*/
toArray = function(arrayLike) {
return _slice.call(arrayLike, 0);
};
try {
sliceCanConvertNodelists = toArray(fabric.document.childNodes) instanceof Array;
}
catch (err) { }
if (!sliceCanConvertNodelists) {
toArray = function(arrayLike) {
var arr = new Array(arrayLike.length), i = arrayLike.length;
while (i--) {
arr[i] = arrayLike[i];
}
return arr;
};
}
/**
* Creates specified element with specified attributes
* @memberOf fabric.util
* @param {String} tagName Type of an element to create
* @param {Object} [attributes] Attributes to set on an element
* @return {HTMLElement} Newly created element
*/
function makeElement(tagName, attributes) {
var el = fabric.document.createElement(tagName);
for (var prop in attributes) {
if (prop === 'class') {
el.className = attributes[prop];
}
else if (prop === 'for') {
el.htmlFor = attributes[prop];
}
else {
el.setAttribute(prop, attributes[prop]);
}
}
return el;
}
/**
* Adds class to an element
* @memberOf fabric.util
* @param {HTMLElement} element Element to add class to
* @param {String} className Class to add to an element
*/
function addClass(element, className) {
if (element && (' ' + element.className + ' ').indexOf(' ' + className + ' ') === -1) {
element.className += (element.className ? ' ' : '') + className;
}
}
/**
* Wraps element with another element
* @memberOf fabric.util
* @param {HTMLElement} element Element to wrap
* @param {HTMLElement|String} wrapper Element to wrap with
* @param {Object} [attributes] Attributes to set on a wrapper
* @return {HTMLElement} wrapper
*/
function wrapElement(element, wrapper, attributes) {
if (typeof wrapper === 'string') {
wrapper = makeElement(wrapper, attributes);
}
if (element.parentNode) {
element.parentNode.replaceChild(wrapper, element);
}
wrapper.appendChild(element);
return wrapper;
}
/**
* Returns element scroll offsets
* @memberOf fabric.util
* @param {HTMLElement} element Element to operate on
* @return {Object} Object with left/top values
*/
function getScrollLeftTop(element) {
var left = 0,
top = 0,
docElement = fabric.document.documentElement,
body = fabric.document.body || {
scrollLeft: 0, scrollTop: 0
};
// While loop checks (and then sets element to) .parentNode OR .host
// to account for ShadowDOM. We still want to traverse up out of ShadowDOM,
// but the .parentNode of a root ShadowDOM node will always be null, instead
// it should be accessed through .host. See http://stackoverflow.com/a/24765528/4383938
while (element && (element.parentNode || element.host)) {
// Set element to element parent, or 'host' in case of ShadowDOM
element = element.parentNode || element.host;
if (element === fabric.document) {
left = body.scrollLeft || docElement.scrollLeft || 0;
top = body.scrollTop || docElement.scrollTop || 0;
}
else {
left += element.scrollLeft || 0;
top += element.scrollTop || 0;
}
if (element.nodeType === 1 && element.style.position === 'fixed') {
break;
}
}
return { left: left, top: top };
}
/**
* Returns offset for a given element
* @function
* @memberOf fabric.util
* @param {HTMLElement} element Element to get offset for
* @return {Object} Object with "left" and "top" properties
*/
function getElementOffset(element) {
var docElem,
doc = element && element.ownerDocument,
box = { left: 0, top: 0 },
offset = { left: 0, top: 0 },
scrollLeftTop,
offsetAttributes = {
borderLeftWidth: 'left',
borderTopWidth: 'top',
paddingLeft: 'left',
paddingTop: 'top'
};
if (!doc) {
return offset;
}
for (var attr in offsetAttributes) {
offset[offsetAttributes[attr]] += parseInt(getElementStyle(element, attr), 10) || 0;
}
docElem = doc.documentElement;
if ( typeof element.getBoundingClientRect !== 'undefined' ) {
box = element.getBoundingClientRect();
}
scrollLeftTop = getScrollLeftTop(element);
return {
left: box.left + scrollLeftTop.left - (docElem.clientLeft || 0) + offset.left,
top: box.top + scrollLeftTop.top - (docElem.clientTop || 0) + offset.top
};
}
/**
* Returns style attribute value of a given element
* @memberOf fabric.util
* @param {HTMLElement} element Element to get style attribute for
* @param {String} attr Style attribute to get for element
* @return {String} Style attribute value of the given element.
*/
var getElementStyle;
if (fabric.document.defaultView && fabric.document.defaultView.getComputedStyle) {
getElementStyle = function(element, attr) {
var style = fabric.document.defaultView.getComputedStyle(element, null);
return style ? style[attr] : undefined;
};
}
else {
getElementStyle = function(element, attr) {
var value = element.style[attr];
if (!value && element.currentStyle) {
value = element.currentStyle[attr];
}
return value;
};
}
(function () {
var style = fabric.document.documentElement.style,
selectProp = 'userSelect' in style
? 'userSelect'
: 'MozUserSelect' in style
? 'MozUserSelect'
: 'WebkitUserSelect' in style
? 'WebkitUserSelect'
: 'KhtmlUserSelect' in style
? 'KhtmlUserSelect'
: '';
/**
* Makes element unselectable
* @memberOf fabric.util
* @param {HTMLElement} element Element to make unselectable
* @return {HTMLElement} Element that was passed in
*/
function makeElementUnselectable(element) {
if (typeof element.onselectstart !== 'undefined') {
element.onselectstart = fabric.util.falseFunction;
}
if (selectProp) {
element.style[selectProp] = 'none';
}
else if (typeof element.unselectable === 'string') {
element.unselectable = 'on';
}
return element;
}
/**
* Makes element selectable
* @memberOf fabric.util
* @param {HTMLElement} element Element to make selectable
* @return {HTMLElement} Element that was passed in
*/
function makeElementSelectable(element) {
if (typeof element.onselectstart !== 'undefined') {
element.onselectstart = null;
}
if (selectProp) {
element.style[selectProp] = '';
}
else if (typeof element.unselectable === 'string') {
element.unselectable = '';
}
return element;
}
fabric.util.makeElementUnselectable = makeElementUnselectable;
fabric.util.makeElementSelectable = makeElementSelectable;
})();
(function() {
/**
* Inserts a script element with a given url into a document; invokes callback, when that script is finished loading
* @memberOf fabric.util
* @param {String} url URL of a script to load
* @param {Function} callback Callback to execute when script is finished loading
*/
function getScript(url, callback) {
var headEl = fabric.document.getElementsByTagName('head')[0],
scriptEl = fabric.document.createElement('script'),
loading = true;
/** @ignore */
scriptEl.onload = /** @ignore */ scriptEl.onreadystatechange = function(e) {
if (loading) {
if (typeof this.readyState === 'string' &&
this.readyState !== 'loaded' &&
this.readyState !== 'complete') {
return;
}
loading = false;
callback(e || fabric.window.event);
scriptEl = scriptEl.onload = scriptEl.onreadystatechange = null;
}
};
scriptEl.src = url;
headEl.appendChild(scriptEl);
// causes issue in Opera
// headEl.removeChild(scriptEl);
}
fabric.util.getScript = getScript;
})();
function getNodeCanvas(element) {
var impl = fabric.jsdomImplForWrapper(element);
return impl._canvas || impl._image;
};
function cleanUpJsdomNode(element) {
if (!fabric.isLikelyNode) {
return;
}
var impl = fabric.jsdomImplForWrapper(element);
if (impl) {
impl._image = null;
impl._canvas = null;
// unsure if necessary
impl._currentSrc = null;
impl._attributes = null;
impl._classList = null;
}
}
fabric.util.getById = getById;
fabric.util.toArray = toArray;
fabric.util.makeElement = makeElement;
fabric.util.addClass = addClass;
fabric.util.wrapElement = wrapElement;
fabric.util.getScrollLeftTop = getScrollLeftTop;
fabric.util.getElementOffset = getElementOffset;
fabric.util.getElementStyle = getElementStyle;
fabric.util.getNodeCanvas = getNodeCanvas;
fabric.util.cleanUpJsdomNode = cleanUpJsdomNode;
})();
(function() {
function addParamToUrl(url, param) {
return url + (/\?/.test(url) ? '&' : '?') + param;
}
function emptyFn() { }
/**
* Cross-browser abstraction for sending XMLHttpRequest
* @memberOf fabric.util
* @param {String} url URL to send XMLHttpRequest to
* @param {Object} [options] Options object
* @param {String} [options.method="GET"]
* @param {String} [options.parameters] parameters to append to url in GET or in body
* @param {String} [options.body] body to send with POST or PUT request
* @param {Function} options.onComplete Callback to invoke when request is completed
* @return {XMLHttpRequest} request
*/
function request(url, options) {
options || (options = { });
var method = options.method ? options.method.toUpperCase() : 'GET',
onComplete = options.onComplete || function() { },
xhr = new fabric.window.XMLHttpRequest(),
body = options.body || options.parameters;
/** @ignore */
xhr.onreadystatechange = function() {
if (xhr.readyState === 4) {
onComplete(xhr);
xhr.onreadystatechange = emptyFn;
}
};
if (method === 'GET') {
body = null;
if (typeof options.parameters === 'string') {
url = addParamToUrl(url, options.parameters);
}
}
xhr.open(method, url, true);
if (method === 'POST' || method === 'PUT') {
xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
}
xhr.send(body);
return xhr;
}
fabric.util.request = request;
})();
/**
* Wrapper around `console.log` (when available)
* @param {*} [values] Values to log
*/
fabric.log = function() { };
/**
* Wrapper around `console.warn` (when available)
* @param {*} [values] Values to log as a warning
*/
fabric.warn = function() { };
/* eslint-disable */
if (typeof console !== 'undefined') {
['log', 'warn'].forEach(function(methodName) {
if (typeof console[methodName] !== 'undefined' &&
typeof console[methodName].apply === 'function') {
fabric[methodName] = function() {
return console[methodName].apply(console, arguments);
};
}
});
}
/* eslint-enable */
(function() {
function noop() {
return false;
}
function defaultEasing(t, b, c, d) {
return -c * Math.cos(t / d * (Math.PI / 2)) + c + b;
}
/**
* Changes value from one to another within certain period of time, invoking callbacks as value is being changed.
* @memberOf fabric.util
* @param {Object} [options] Animation options
* @param {Function} [options.onChange] Callback; invoked on every value change
* @param {Function} [options.onComplete] Callback; invoked when value change is completed
* @param {Number} [options.startValue=0] Starting value
* @param {Number} [options.endValue=100] Ending value
* @param {Number} [options.byValue=100] Value to modify the property by
* @param {Function} [options.easing] Easing function
* @param {Number} [options.duration=500] Duration of change (in ms)
* @param {Function} [options.abort] Additional function with logic. If returns true, onComplete is called.
*/
function animate(options) {
requestAnimFrame(function(timestamp) {
options || (options = { });
var start = timestamp || +new Date(),
duration = options.duration || 500,
finish = start + duration, time,
onChange = options.onChange || noop,
abort = options.abort || noop,
onComplete = options.onComplete || noop,
easing = options.easing || defaultEasing,
startValue = 'startValue' in options ? options.startValue : 0,
endValue = 'endValue' in options ? options.endValue : 100,
byValue = options.byValue || endValue - startValue;
options.onStart && options.onStart();
(function tick(ticktime) {
// TODO: move abort call after calculation
// and pass (current,valuePerc, timePerc) as arguments
time = ticktime || +new Date();
var currentTime = time > finish ? duration : (time - start),
timePerc = currentTime / duration,
current = easing(currentTime, startValue, byValue, duration),
valuePerc = Math.abs((current - startValue) / byValue);
if (abort()) {
onComplete(endValue, 1, 1);
return;
}
if (time > finish) {
onChange(endValue, 1, 1);
onComplete(endValue, 1, 1);
return;
}
else {
onChange(current, valuePerc, timePerc);
requestAnimFrame(tick);
}
})(start);
});
}
var _requestAnimFrame = fabric.window.requestAnimationFrame ||
fabric.window.webkitRequestAnimationFrame ||
fabric.window.mozRequestAnimationFrame ||
fabric.window.oRequestAnimationFrame ||
fabric.window.msRequestAnimationFrame ||
function(callback) {
return fabric.window.setTimeout(callback, 1000 / 60);
};
var _cancelAnimFrame = fabric.window.cancelAnimationFrame || fabric.window.clearTimeout;
/**
* requestAnimationFrame polyfill based on http://paulirish.com/2011/requestanimationframe-for-smart-animating/
* In order to get a precise start time, `requestAnimFrame` should be called as an entry into the method
* @memberOf fabric.util
* @param {Function} callback Callback to invoke
* @param {DOMElement} element optional Element to associate with animation
*/
function requestAnimFrame() {
return _requestAnimFrame.apply(fabric.window, arguments);
}
function cancelAnimFrame() {
return _cancelAnimFrame.apply(fabric.window, arguments);
}
fabric.util.animate = animate;
fabric.util.requestAnimFrame = requestAnimFrame;
fabric.util.cancelAnimFrame = cancelAnimFrame;
})();
(function() {
// Calculate an in-between color. Returns a "rgba()" string.
// Credit: Edwin Martin <edwin@bitstorm.org>
// http://www.bitstorm.org/jquery/color-animation/jquery.animate-colors.js
function calculateColor(begin, end, pos) {
var color = 'rgba('
+ parseInt((begin[0] + pos * (end[0] - begin[0])), 10) + ','
+ parseInt((begin[1] + pos * (end[1] - begin[1])), 10) + ','
+ parseInt((begin[2] + pos * (end[2] - begin[2])), 10);
color += ',' + (begin && end ? parseFloat(begin[3] + pos * (end[3] - begin[3])) : 1);
color += ')';
return color;
}
/**
* Changes the color from one to another within certain period of time, invoking callbacks as value is being changed.
* @memberOf fabric.util
* @param {String} fromColor The starting color in hex or rgb(a) format.
* @param {String} toColor The starting color in hex or rgb(a) format.
* @param {Number} [duration] Duration of change (in ms).
* @param {Object} [options] Animation options
* @param {Function} [options.onChange] Callback; invoked on every value change
* @param {Function} [options.onComplete] Callback; invoked when value change is completed
* @param {Function} [options.colorEasing] Easing function. Note that this function only take two arguments (currentTime, duration). Thus the regular animation easing functions cannot be used.
* @param {Function} [options.abort] Additional function with logic. If returns true, onComplete is called.
*/
function animateColor(fromColor, toColor, duration, options) {
var startColor = new fabric.Color(fromColor).getSource(),
endColor = new fabric.Color(toColor).getSource();
options = options || {};
fabric.util.animate(fabric.util.object.extend(options, {
duration: duration || 500,
startValue: startColor,
endValue: endColor,
byValue: endColor,
easing: function (currentTime, startValue, byValue, duration) {
var posValue = options.colorEasing
? options.colorEasing(currentTime, duration)
: 1 - Math.cos(currentTime / duration * (Math.PI / 2));
return calculateColor(startValue, byValue, posValue);
}
}));
}
fabric.util.animateColor = animateColor;
})();
(function() {
function normalize(a, c, p, s) {
if (a < Math.abs(c)) {
a = c;
s = p / 4;
}
else {
//handle the 0/0 case:
if (c === 0 && a === 0) {
s = p / (2 * Math.PI) * Math.asin(1);
}
else {
s = p / (2 * Math.PI) * Math.asin(c / a);
}
}
return { a: a, c: c, p: p, s: s };
}
function elastic(opts, t, d) {
return opts.a *
Math.pow(2, 10 * (t -= 1)) *
Math.sin( (t * d - opts.s) * (2 * Math.PI) / opts.p );
}
/**
* Cubic easing out
* @memberOf fabric.util.ease
*/
function easeOutCubic(t, b, c, d) {
return c * ((t = t / d - 1) * t * t + 1) + b;
}
/**
* Cubic easing in and out
* @memberOf fabric.util.ease
*/
function easeInOutCubic(t, b, c, d) {
t /= d / 2;
if (t < 1) {
return c / 2 * t * t * t + b;
}
return c / 2 * ((t -= 2) * t * t + 2) + b;
}
/**
* Quartic easing in
* @memberOf fabric.util.ease
*/
function easeInQuart(t, b, c, d) {
return c * (t /= d) * t * t * t + b;
}
/**
* Quartic easing out
* @memberOf fabric.util.ease
*/
function easeOutQuart(t, b, c, d) {
return -c * ((t = t / d - 1) * t * t * t - 1) + b;
}
/**
* Quartic easing in and out
* @memberOf fabric.util.ease
*/
function easeInOutQuart(t, b, c, d) {
t /= d / 2;
if (t < 1) {
return c / 2 * t * t * t * t + b;
}
return -c / 2 * ((t -= 2) * t * t * t - 2) + b;
}
/**
* Quintic easing in
* @memberOf fabric.util.ease
*/
function easeInQuint(t, b, c, d) {
return c * (t /= d) * t * t * t * t + b;
}
/**
* Quintic easing out
* @memberOf fabric.util.ease
*/
function easeOutQuint(t, b, c, d) {
return c * ((t = t / d - 1) * t * t * t * t + 1) + b;
}
/**
* Quintic easing in and out
* @memberOf fabric.util.ease
*/
function easeInOutQuint(t, b, c, d) {
t /= d / 2;
if (t < 1) {
return c / 2 * t * t * t * t * t + b;
}
return c / 2 * ((t -= 2) * t * t * t * t + 2) + b;
}
/**
* Sinusoidal easing in
* @memberOf fabric.util.ease
*/
function easeInSine(t, b, c, d) {
return -c * Math.cos(t / d * (Math.PI / 2)) + c + b;
}
/**
* Sinusoidal easing out
* @memberOf fabric.util.ease
*/
function easeOutSine(t, b, c, d) {
return c * Math.sin(t / d * (Math.PI / 2)) + b;
}
/**
* Sinusoidal easing in and out
* @memberOf fabric.util.ease
*/
function easeInOutSine(t, b, c, d) {
return -c / 2 * (Math.cos(Math.PI * t / d) - 1) + b;
}
/**
* Exponential easing in
* @memberOf fabric.util.ease
*/
function easeInExpo(t, b, c, d) {
return (t === 0) ? b : c * Math.pow(2, 10 * (t / d - 1)) + b;
}
/**
* Exponential easing out
* @memberOf fabric.util.ease
*/
function easeOutExpo(t, b, c, d) {
return (t === d) ? b + c : c * (-Math.pow(2, -10 * t / d) + 1) + b;
}
/**
* Exponential easing in and out
* @memberOf fabric.util.ease
*/
function easeInOutExpo(t, b, c, d) {
if (t === 0) {
return b;
}
if (t === d) {
return b + c;
}
t /= d / 2;
if (t < 1) {
return c / 2 * Math.pow(2, 10 * (t - 1)) + b;
}
return c / 2 * (-Math.pow(2, -10 * --t) + 2) + b;
}
/**
* Circular easing in
* @memberOf fabric.util.ease
*/
function easeInCirc(t, b, c, d) {
return -c * (Math.sqrt(1 - (t /= d) * t) - 1) + b;
}
/**
* Circular easing out
* @memberOf fabric.util.ease
*/
function easeOutCirc(t, b, c, d) {
return c * Math.sqrt(1 - (t = t / d - 1) * t) + b;
}
/**
* Circular easing in and out
* @memberOf fabric.util.ease
*/
function easeInOutCirc(t, b, c, d) {
t /= d / 2;
if (t < 1) {
return -c / 2 * (Math.sqrt(1 - t * t) - 1) + b;
}
return c / 2 * (Math.sqrt(1 - (t -= 2) * t) + 1) + b;
}
/**
* Elastic easing in
* @memberOf fabric.util.ease
*/
function easeInElastic(t, b, c, d) {
var s = 1.70158, p = 0, a = c;
if (t === 0) {
return b;
}
t /= d;
if (t === 1) {
return b + c;
}
if (!p) {
p = d * 0.3;
}
var opts = normalize(a, c, p, s);
return -elastic(opts, t, d) + b;
}
/**
* Elastic easing out
* @memberOf fabric.util.ease
*/
function easeOutElastic(t, b, c, d) {
var s = 1.70158, p = 0, a = c;
if (t === 0) {
return b;
}
t /= d;
if (t === 1) {
return b + c;
}
if (!p) {
p = d * 0.3;
}
var opts = normalize(a, c, p, s);
return opts.a * Math.pow(2, -10 * t) * Math.sin((t * d - opts.s) * (2 * Math.PI) / opts.p ) + opts.c + b;
}
/**
* Elastic easing in and out
* @memberOf fabric.util.ease
*/
function easeInOutElastic(t, b, c, d) {
var s = 1.70158, p = 0, a = c;
if (t === 0) {
return b;
}
t /= d / 2;
if (t === 2) {
return b + c;
}
if (!p) {
p = d * (0.3 * 1.5);
}
var opts = normalize(a, c, p, s);
if (t < 1) {
return -0.5 * elastic(opts, t, d) + b;
}
return opts.a * Math.pow(2, -10 * (t -= 1)) *
Math.sin((t * d - opts.s) * (2 * Math.PI) / opts.p ) * 0.5 + opts.c + b;
}
/**
* Backwards easing in
* @memberOf fabric.util.ease
*/
function easeInBack(t, b, c, d, s) {
if (s === undefined) {
s = 1.70158;
}
return c * (t /= d) * t * ((s + 1) * t - s) + b;
}
/**
* Backwards easing out
* @memberOf fabric.util.ease
*/
function easeOutBack(t, b, c, d, s) {
if (s === undefined) {
s = 1.70158;
}
return c * ((t = t / d - 1) * t * ((s + 1) * t + s) + 1) + b;
}
/**
* Backwards easing in and out
* @memberOf fabric.util.ease
*/
function easeInOutBack(t, b, c, d, s) {
if (s === undefined) {
s = 1.70158;
}
t /= d / 2;
if (t < 1) {
return c / 2 * (t * t * (((s *= (1.525)) + 1) * t - s)) + b;
}
return c / 2 * ((t -= 2) * t * (((s *= (1.525)) + 1) * t + s) + 2) + b;
}
/**
* Bouncing easing in
* @memberOf fabric.util.ease
*/
function easeInBounce(t, b, c, d) {
return c - easeOutBounce (d - t, 0, c, d) + b;
}
/**
* Bouncing easing out
* @memberOf fabric.util.ease
*/
function easeOutBounce(t, b, c, d) {
if ((t /= d) < (1 / 2.75)) {
return c * (7.5625 * t * t) + b;
}
else if (t < (2 / 2.75)) {
return c * (7.5625 * (t -= (1.5 / 2.75)) * t + 0.75) + b;
}
else if (t < (2.5 / 2.75)) {
return c * (7.5625 * (t -= (2.25 / 2.75)) * t + 0.9375) + b;
}
else {
return c * (7.5625 * (t -= (2.625 / 2.75)) * t + 0.984375) + b;
}
}
/**
* Bouncing easing in and out
* @memberOf fabric.util.ease
*/
function easeInOutBounce(t, b, c, d) {
if (t < d / 2) {
return easeInBounce (t * 2, 0, c, d) * 0.5 + b;
}
return easeOutBounce(t * 2 - d, 0, c, d) * 0.5 + c * 0.5 + b;
}
/**
* Easing functions
* See <a href="http://gizma.com/easing/">Easing Equations by Robert Penner</a>
* @namespace fabric.util.ease
*/
fabric.util.ease = {
/**
* Quadratic easing in
* @memberOf fabric.util.ease
*/
easeInQuad: function(t, b, c, d) {
return c * (t /= d) * t + b;
},
/**
* Quadratic easing out
* @memberOf fabric.util.ease
*/
easeOutQuad: function(t, b, c, d) {
return -c * (t /= d) * (t - 2) + b;
},
/**
* Quadratic easing in and out
* @memberOf fabric.util.ease
*/
easeInOutQuad: function(t, b, c, d) {
t /= (d / 2);
if (t < 1) {
return c / 2 * t * t + b;
}
return -c / 2 * ((--t) * (t - 2) - 1) + b;
},
/**
* Cubic easing in
* @memberOf fabric.util.ease
*/
easeInCubic: function(t, b, c, d) {
return c * (t /= d) * t * t + b;
},
easeOutCubic: easeOutCubic,
easeInOutCubic: easeInOutCubic,
easeInQuart: easeInQuart,
easeOutQuart: easeOutQuart,
easeInOutQuart: easeInOutQuart,
easeInQuint: easeInQuint,
easeOutQuint: easeOutQuint,
easeInOutQuint: easeInOutQuint,
easeInSine: easeInSine,
easeOutSine: easeOutSine,
easeInOutSine: easeInOutSine,
easeInExpo: easeInExpo,
easeOutExpo: easeOutExpo,
easeInOutExpo: easeInOutExpo,
easeInCirc: easeInCirc,
easeOutCirc: easeOutCirc,
easeInOutCirc: easeInOutCirc,
easeInElastic: easeInElastic,
easeOutElastic: easeOutElastic,
easeInOutElastic: easeInOutElastic,
easeInBack: easeInBack,
easeOutBack: easeOutBack,
easeInOutBack: easeInOutBack,
easeInBounce: easeInBounce,
easeOutBounce: easeOutBounce,
easeInOutBounce: easeInOutBounce
};
})();
(function(global) {
'use strict';
/**
* @name fabric
* @namespace
*/
var fabric = global.fabric || (global.fabric = { }),
extend = fabric.util.object.extend,
clone = fabric.util.object.clone,
toFixed = fabric.util.toFixed,
parseUnit = fabric.util.parseUnit,
multiplyTransformMatrices = fabric.util.multiplyTransformMatrices,
svgValidTagNames = ['path', 'circle', 'polygon', 'polyline', 'ellipse', 'rect', 'line',
'image', 'text'],
svgViewBoxElements = ['symbol', 'image', 'marker', 'pattern', 'view', 'svg'],
svgInvalidAncestors = ['pattern', 'defs', 'symbol', 'metadata', 'clipPath', 'mask', 'desc'],
svgValidParents = ['symbol', 'g', 'a', 'svg', 'clipPath', 'defs'],
attributesMap = {
cx: 'left',
x: 'left',
r: 'radius',
cy: 'top',
y: 'top',
display: 'visible',
visibility: 'visible',
transform: 'transformMatrix',
'fill-opacity': 'fillOpacity',
'fill-rule': 'fillRule',
'font-family': 'fontFamily',
'font-size': 'fontSize',
'font-style': 'fontStyle',
'font-weight': 'fontWeight',
'letter-spacing': 'charSpacing',
'paint-order': 'paintFirst',
'stroke-dasharray': 'strokeDashArray',
'stroke-dashoffset': 'strokeDashOffset',
'stroke-linecap': 'strokeLineCap',
'stroke-linejoin': 'strokeLineJoin',
'stroke-miterlimit': 'strokeMiterLimit',
'stroke-opacity': 'strokeOpacity',
'stroke-width': 'strokeWidth',
'text-decoration': 'textDecoration',
'text-anchor': 'textAnchor',
opacity: 'opacity',
'clip-path': 'clipPath',
'clip-rule': 'clipRule',
'vector-effect': 'strokeUniform'
},
colorAttributes = {
stroke: 'strokeOpacity',
fill: 'fillOpacity'
};
fabric.svgValidTagNamesRegEx = getSvgRegex(svgValidTagNames);
fabric.svgViewBoxElementsRegEx = getSvgRegex(svgViewBoxElements);
fabric.svgInvalidAncestorsRegEx = getSvgRegex(svgInvalidAncestors);
fabric.svgValidParentsRegEx = getSvgRegex(svgValidParents);
fabric.cssRules = { };
fabric.gradientDefs = { };
fabric.clipPaths = { };
function normalizeAttr(attr) {
// transform attribute names
if (attr in attributesMap) {
return attributesMap[attr];
}
return attr;
}
function normalizeValue(attr, value, parentAttributes, fontSize) {
var isArray = Object.prototype.toString.call(value) === '[object Array]',
parsed;
if ((attr === 'fill' || attr === 'stroke') && value === 'none') {
value = '';
}
else if (attr === 'vector-effect') {
value = value === 'non-scaling-stroke';
}
else if (attr === 'strokeDashArray') {
if (value === 'none') {
value = null;
}
else {
value = value.replace(/,/g, ' ').split(/\s+/).map(parseFloat);
}
}
else if (attr === 'transformMatrix') {
if (parentAttributes && parentAttributes.transformMatrix) {
value = multiplyTransformMatrices(
parentAttributes.transformMatrix, fabric.parseTransformAttribute(value));
}
else {
value = fabric.parseTransformAttribute(value);
}
}
else if (attr === 'visible') {
value = value !== 'none' && value !== 'hidden';
// display=none on parent element always takes precedence over child element
if (parentAttributes && parentAttributes.visible === false) {
value = false;
}
}
else if (attr === 'opacity') {
value = parseFloat(value);
if (parentAttributes && typeof parentAttributes.opacity !== 'undefined') {
value *= parentAttributes.opacity;
}
}
else if (attr === 'textAnchor' /* text-anchor */) {
value = value === 'start' ? 'left' : value === 'end' ? 'right' : 'center';
}
else if (attr === 'charSpacing') {
// parseUnit returns px and we convert it to em
parsed = parseUnit(value, fontSize) / fontSize * 1000;
}
else if (attr === 'paintFirst') {
var fillIndex = value.indexOf('fill');
var strokeIndex = value.indexOf('stroke');
var value = 'fill';
if (fillIndex > -1 && strokeIndex > -1 && strokeIndex < fillIndex) {
value = 'stroke';
}
else if (fillIndex === -1 && strokeIndex > -1) {
value = 'stroke';
}
}
else if (attr === 'href' || attr === 'xlink:href') {
return value;
}
else {
parsed = isArray ? value.map(parseUnit) : parseUnit(value, fontSize);
}
return (!isArray && isNaN(parsed) ? value : parsed);
}
/**
* @private
*/
function getSvgRegex(arr) {
return new RegExp('^(' + arr.join('|') + ')\\b', 'i');
}
/**
* @private
* @param {Object} attributes Array of attributes to parse
*/
function _setStrokeFillOpacity(attributes) {
for (var attr in colorAttributes) {
if (typeof attributes[colorAttributes[attr]] === 'undefined' || attributes[attr] === '') {
continue;
}
if (typeof attributes[attr] === 'undefined') {
if (!fabric.Object.prototype[attr]) {
continue;
}
attributes[attr] = fabric.Object.prototype[attr];
}
if (attributes[attr].indexOf('url(') === 0) {
continue;
}
var color = new fabric.Color(attributes[attr]);
attributes[attr] = color.setAlpha(toFixed(color.getAlpha() * attributes[colorAttributes[attr]], 2)).toRgba();
}
return attributes;
}
/**
* @private
*/
function _getMultipleNodes(doc, nodeNames) {
var nodeName, nodeArray = [], nodeList, i, len;
for (i = 0, len = nodeNames.length; i < len; i++) {
nodeName = nodeNames[i];
nodeList = doc.getElementsByTagName(nodeName);
nodeArray = nodeArray.concat(Array.prototype.slice.call(nodeList));
}
return nodeArray;
}
/**
* Parses "transform" attribute, returning an array of values
* @static
* @function
* @memberOf fabric
* @param {String} attributeValue String containing attribute value
* @return {Array} Array of 6 elements representing transformation matrix
*/
fabric.parseTransformAttribute = (function() {
function rotateMatrix(matrix, args) {
var cos = fabric.util.cos(args[0]), sin = fabric.util.sin(args[0]),
x = 0, y = 0;
if (args.length === 3) {
x = args[1];
y = args[2];
}
matrix[0] = cos;
matrix[1] = sin;
matrix[2] = -sin;
matrix[3] = cos;
matrix[4] = x - (cos * x - sin * y);
matrix[5] = y - (sin * x + cos * y);
}
function scaleMatrix(matrix, args) {
var multiplierX = args[0],
multiplierY = (args.length === 2) ? args[1] : args[0];
matrix[0] = multiplierX;
matrix[3] = multiplierY;
}
function skewMatrix(matrix, args, pos) {
matrix[pos] = Math.tan(fabric.util.degreesToRadians(args[0]));
}
function translateMatrix(matrix, args) {
matrix[4] = args[0];
if (args.length === 2) {
matrix[5] = args[1];
}
}
// identity matrix
var iMatrix = fabric.iMatrix,
// == begin transform regexp
number = fabric.reNum,
commaWsp = '(?:\\s+,?\\s*|,\\s*)',
skewX = '(?:(skewX)\\s*\\(\\s*(' + number + ')\\s*\\))',
skewY = '(?:(skewY)\\s*\\(\\s*(' + number + ')\\s*\\))',
rotate = '(?:(rotate)\\s*\\(\\s*(' + number + ')(?:' +
commaWsp + '(' + number + ')' +
commaWsp + '(' + number + '))?\\s*\\))',
scale = '(?:(scale)\\s*\\(\\s*(' + number + ')(?:' +
commaWsp + '(' + number + '))?\\s*\\))',
translate = '(?:(translate)\\s*\\(\\s*(' + number + ')(?:' +
commaWsp + '(' + number + '))?\\s*\\))',
matrix = '(?:(matrix)\\s*\\(\\s*' +
'(' + number + ')' + commaWsp +
'(' + number + ')' + commaWsp +
'(' + number + ')' + commaWsp +
'(' + number + ')' + commaWsp +
'(' + number + ')' + commaWsp +
'(' + number + ')' +
'\\s*\\))',
transform = '(?:' +
matrix + '|' +
translate + '|' +
scale + '|' +
rotate + '|' +
skewX + '|' +
skewY +
')',
transforms = '(?:' + transform + '(?:' + commaWsp + '*' + transform + ')*' + ')',
transformList = '^\\s*(?:' + transforms + '?)\\s*$',
// http://www.w3.org/TR/SVG/coords.html#TransformAttribute
reTransformList = new RegExp(transformList),
// == end transform regexp
reTransform = new RegExp(transform, 'g');
return function(attributeValue) {
// start with identity matrix
var matrix = iMatrix.concat(),
matrices = [];
// return if no argument was given or
// an argument does not match transform attribute regexp
if (!attributeValue || (attributeValue && !reTransformList.test(attributeValue))) {
return matrix;
}
attributeValue.replace(reTransform, function(match) {
var m = new RegExp(transform).exec(match).filter(function (match) {
// match !== '' && match != null
return (!!match);
}),
operation = m[1],
args = m.slice(2).map(parseFloat);
switch (operation) {
case 'translate':
translateMatrix(matrix, args);
break;
case 'rotate':
args[0] = fabric.util.degreesToRadians(args[0]);
rotateMatrix(matrix, args);
break;
case 'scale':
scaleMatrix(matrix, args);
break;
case 'skewX':
skewMatrix(matrix, args, 2);
break;
case 'skewY':
skewMatrix(matrix, args, 1);
break;
case 'matrix':
matrix = args;
break;
}
// snapshot current matrix into matrices array
matrices.push(matrix.concat());
// reset
matrix = iMatrix.concat();
});
var combinedMatrix = matrices[0];
while (matrices.length > 1) {
matrices.shift();
combinedMatrix = fabric.util.multiplyTransformMatrices(combinedMatrix, matrices[0]);
}
return combinedMatrix;
};
})();
/**
* @private
*/
function parseStyleString(style, oStyle) {
var attr, value;
style.replace(/;\s*$/, '').split(';').forEach(function (chunk) {
var pair = chunk.split(':');
attr = pair[0].trim().toLowerCase();
value = pair[1].trim();
oStyle[attr] = value;
});
}
/**
* @private
*/
function parseStyleObject(style, oStyle) {
var attr, value;
for (var prop in style) {
if (typeof style[prop] === 'undefined') {
continue;
}
attr = prop.toLowerCase();
value = style[prop];
oStyle[attr] = value;
}
}
/**
* @private
*/
function getGlobalStylesForElement(element, svgUid) {
var styles = { };
for (var rule in fabric.cssRules[svgUid]) {
if (elementMatchesRule(element, rule.split(' '))) {
for (var property in fabric.cssRules[svgUid][rule]) {
styles[property] = fabric.cssRules[svgUid][rule][property];
}
}
}
return styles;
}
/**
* @private
*/
function elementMatchesRule(element, selectors) {
var firstMatching, parentMatching = true;
//start from rightmost selector.
firstMatching = selectorMatches(element, selectors.pop());
if (firstMatching && selectors.length) {
parentMatching = doesSomeParentMatch(element, selectors);
}
return firstMatching && parentMatching && (selectors.length === 0);
}
function doesSomeParentMatch(element, selectors) {
var selector, parentMatching = true;
while (element.parentNode && element.parentNode.nodeType === 1 && selectors.length) {
if (parentMatching) {
selector = selectors.pop();
}
element = element.parentNode;
parentMatching = selectorMatches(element, selector);
}
return selectors.length === 0;
}
/**
* @private
*/
function selectorMatches(element, selector) {
var nodeName = element.nodeName,
classNames = element.getAttribute('class'),
id = element.getAttribute('id'), matcher, i;
// i check if a selector matches slicing away part from it.
// if i get empty string i should match
matcher = new RegExp('^' + nodeName, 'i');
selector = selector.replace(matcher, '');
if (id && selector.length) {
matcher = new RegExp('#' + id + '(?![a-zA-Z\\-]+)', 'i');
selector = selector.replace(matcher, '');
}
if (classNames && selector.length) {
classNames = classNames.split(' ');
for (i = classNames.length; i--;) {
matcher = new RegExp('\\.' + classNames[i] + '(?![a-zA-Z\\-]+)', 'i');
selector = selector.replace(matcher, '');
}
}
return selector.length === 0;
}
/**
* @private
* to support IE8 missing getElementById on SVGdocument and on node xmlDOM
*/
function elementById(doc, id) {
var el;
doc.getElementById && (el = doc.getElementById(id));
if (el) {
return el;
}
var node, i, len, nodelist = doc.getElementsByTagName('*');
for (i = 0, len = nodelist.length; i < len; i++) {
node = nodelist[i];
if (id === node.getAttribute('id')) {
return node;
}
}
}
/**
* @private
*/
function parseUseDirectives(doc) {
var nodelist = _getMultipleNodes(doc, ['use', 'svg:use']), i = 0;
while (nodelist.length && i < nodelist.length) {
var el = nodelist[i],
xlink = (el.getAttribute('xlink:href') || el.getAttribute('href')).substr(1),
x = el.getAttribute('x') || 0,
y = el.getAttribute('y') || 0,
el2 = elementById(doc, xlink).cloneNode(true),
currentTrans = (el2.getAttribute('transform') || '') + ' translate(' + x + ', ' + y + ')',
parentNode, oldLength = nodelist.length, attr, j, attrs, len;
applyViewboxTransform(el2);
if (/^svg$/i.test(el2.nodeName)) {
var el3 = el2.ownerDocument.createElement('g');
for (j = 0, attrs = el2.attributes, len = attrs.length; j < len; j++) {
attr = attrs.item(j);
el3.setAttribute(attr.nodeName, attr.nodeValue);
}
// el2.firstChild != null
while (el2.firstChild) {
el3.appendChild(el2.firstChild);
}
el2 = el3;
}
for (j = 0, attrs = el.attributes, len = attrs.length; j < len; j++) {
attr = attrs.item(j);
if (attr.nodeName === 'x' || attr.nodeName === 'y' ||
attr.nodeName === 'xlink:href' || attr.nodeName === 'href') {
continue;
}
if (attr.nodeName === 'transform') {
currentTrans = attr.nodeValue + ' ' + currentTrans;
}
else {
el2.setAttribute(attr.nodeName, attr.nodeValue);
}
}
el2.setAttribute('transform', currentTrans);
el2.setAttribute('instantiated_by_use', '1');
el2.removeAttribute('id');
parentNode = el.parentNode;
parentNode.replaceChild(el2, el);
// some browsers do not shorten nodelist after replaceChild (IE8)
if (nodelist.length === oldLength) {
i++;
}
}
}
// http://www.w3.org/TR/SVG/coords.html#ViewBoxAttribute
// matches, e.g.: +14.56e-12, etc.
var reViewBoxAttrValue = new RegExp(
'^' +
'\\s*(' + fabric.reNum + '+)\\s*,?' +
'\\s*(' + fabric.reNum + '+)\\s*,?' +
'\\s*(' + fabric.reNum + '+)\\s*,?' +
'\\s*(' + fabric.reNum + '+)\\s*' +
'$'
);
/**
* Add a <g> element that envelop all child elements and makes the viewbox transformMatrix descend on all elements
*/
function applyViewboxTransform(element) {
var viewBoxAttr = element.getAttribute('viewBox'),
scaleX = 1,
scaleY = 1,
minX = 0,
minY = 0,
viewBoxWidth, viewBoxHeight, matrix, el,
widthAttr = element.getAttribute('width'),
heightAttr = element.getAttribute('height'),
x = element.getAttribute('x') || 0,
y = element.getAttribute('y') || 0,
preserveAspectRatio = element.getAttribute('preserveAspectRatio') || '',
missingViewBox = (!viewBoxAttr || !fabric.svgViewBoxElementsRegEx.test(element.nodeName)
|| !(viewBoxAttr = viewBoxAttr.match(reViewBoxAttrValue))),
missingDimAttr = (!widthAttr || !heightAttr || widthAttr === '100%' || heightAttr === '100%'),
toBeParsed = missingViewBox && missingDimAttr,
parsedDim = { }, translateMatrix = '', widthDiff = 0, heightDiff = 0;
parsedDim.width = 0;
parsedDim.height = 0;
parsedDim.toBeParsed = toBeParsed;
if (toBeParsed) {
return parsedDim;
}
if (missingViewBox) {
parsedDim.width = parseUnit(widthAttr);
parsedDim.height = parseUnit(heightAttr);
return parsedDim;
}
minX = -parseFloat(viewBoxAttr[1]);
minY = -parseFloat(viewBoxAttr[2]);
viewBoxWidth = parseFloat(viewBoxAttr[3]);
viewBoxHeight = parseFloat(viewBoxAttr[4]);
parsedDim.minX = minX;
parsedDim.minY = minY;
parsedDim.viewBoxWidth = viewBoxWidth;
parsedDim.viewBoxHeight = viewBoxHeight;
if (!missingDimAttr) {
parsedDim.width = parseUnit(widthAttr);
parsedDim.height = parseUnit(heightAttr);
scaleX = parsedDim.width / viewBoxWidth;
scaleY = parsedDim.height / viewBoxHeight;
}
else {
parsedDim.width = viewBoxWidth;
parsedDim.height = viewBoxHeight;
}
// default is to preserve aspect ratio
preserveAspectRatio = fabric.util.parsePreserveAspectRatioAttribute(preserveAspectRatio);
if (preserveAspectRatio.alignX !== 'none') {
//translate all container for the effect of Mid, Min, Max
if (preserveAspectRatio.meetOrSlice === 'meet') {
scaleY = scaleX = (scaleX > scaleY ? scaleY : scaleX);
// calculate additional translation to move the viewbox
}
if (preserveAspectRatio.meetOrSlice === 'slice') {
scaleY = scaleX = (scaleX > scaleY ? scaleX : scaleY);
// calculate additional translation to move the viewbox
}
widthDiff = parsedDim.width - viewBoxWidth * scaleX;
heightDiff = parsedDim.height - viewBoxHeight * scaleX;
if (preserveAspectRatio.alignX === 'Mid') {
widthDiff /= 2;
}
if (preserveAspectRatio.alignY === 'Mid') {
heightDiff /= 2;
}
if (preserveAspectRatio.alignX === 'Min') {
widthDiff = 0;
}
if (preserveAspectRatio.alignY === 'Min') {
heightDiff = 0;
}
}
if (scaleX === 1 && scaleY === 1 && minX === 0 && minY === 0 && x === 0 && y === 0) {
return parsedDim;
}
if (x || y) {
translateMatrix = ' translate(' + parseUnit(x) + ' ' + parseUnit(y) + ') ';
}
matrix = translateMatrix + ' matrix(' + scaleX +
' 0' +
' 0 ' +
scaleY + ' ' +
(minX * scaleX + widthDiff) + ' ' +
(minY * scaleY + heightDiff) + ') ';
parsedDim.viewboxTransform = fabric.parseTransformAttribute(matrix);
if (element.nodeName === 'svg') {
el = element.ownerDocument.createElement('g');
// element.firstChild != null
while (element.firstChild) {
el.appendChild(element.firstChild);
}
element.appendChild(el);
}
else {
el = element;
matrix = el.getAttribute('transform') + matrix;
}
el.setAttribute('transform', matrix);
return parsedDim;
}
function hasAncestorWithNodeName(element, nodeName) {
while (element && (element = element.parentNode)) {
if (element.nodeName && nodeName.test(element.nodeName.replace('svg:', ''))
&& !element.getAttribute('instantiated_by_use')) {
return true;
}
}
return false;
}
/**
* Parses an SVG document, converts it to an array of corresponding fabric.* instances and passes them to a callback
* @static
* @function
* @memberOf fabric
* @param {SVGDocument} doc SVG document to parse
* @param {Function} callback Callback to call when parsing is finished;
* It's being passed an array of elements (parsed from a document).
* @param {Function} [reviver] Method for further parsing of SVG elements, called after each fabric object created.
* @param {Object} [parsingOptions] options for parsing document
* @param {String} [parsingOptions.crossOrigin] crossOrigin settings
*/
fabric.parseSVGDocument = function(doc, callback, reviver, parsingOptions) {
if (!doc) {
return;
}
parseUseDirectives(doc);
var svgUid = fabric.Object.__uid++, i, len,
options = applyViewboxTransform(doc),
descendants = fabric.util.toArray(doc.getElementsByTagName('*'));
options.crossOrigin = parsingOptions && parsingOptions.crossOrigin;
options.svgUid = svgUid;
if (descendants.length === 0 && fabric.isLikelyNode) {
// we're likely in node, where "o3-xml" library fails to gEBTN("*")
// https://github.com/ajaxorg/node-o3-xml/issues/21
descendants = doc.selectNodes('//*[name(.)!="svg"]');
var arr = [];
for (i = 0, len = descendants.length; i < len; i++) {
arr[i] = descendants[i];
}
descendants = arr;
}
var elements = descendants.filter(function(el) {
applyViewboxTransform(el);
return fabric.svgValidTagNamesRegEx.test(el.nodeName.replace('svg:', '')) &&
!hasAncestorWithNodeName(el, fabric.svgInvalidAncestorsRegEx); // http://www.w3.org/TR/SVG/struct.html#DefsElement
});
if (!elements || (elements && !elements.length)) {
callback && callback([], {});
return;
}
var clipPaths = { };
descendants.filter(function(el) {
return el.nodeName.replace('svg:', '') === 'clipPath';
}).forEach(function(el) {
var id = el.getAttribute('id');
clipPaths[id] = fabric.util.toArray(el.getElementsByTagName('*')).filter(function(el) {
return fabric.svgValidTagNamesRegEx.test(el.nodeName.replace('svg:', ''));
});
});
fabric.gradientDefs[svgUid] = fabric.getGradientDefs(doc);
fabric.cssRules[svgUid] = fabric.getCSSRules(doc);
fabric.clipPaths[svgUid] = clipPaths;
// Precedence of rules: style > class > attribute
fabric.parseElements(elements, function(instances, elements) {
if (callback) {
callback(instances, options, elements, descendants);
delete fabric.gradientDefs[svgUid];
delete fabric.cssRules[svgUid];
delete fabric.clipPaths[svgUid];
}
}, clone(options), reviver, parsingOptions);
};
function recursivelyParseGradientsXlink(doc, gradient) {
var gradientsAttrs = ['gradientTransform', 'x1', 'x2', 'y1', 'y2', 'gradientUnits', 'cx', 'cy', 'r', 'fx', 'fy'],
xlinkAttr = 'xlink:href',
xLink = gradient.getAttribute(xlinkAttr).substr(1),
referencedGradient = elementById(doc, xLink);
if (referencedGradient && referencedGradient.getAttribute(xlinkAttr)) {
recursivelyParseGradientsXlink(doc, referencedGradient);
}
gradientsAttrs.forEach(function(attr) {
if (referencedGradient && !gradient.hasAttribute(attr) && referencedGradient.hasAttribute(attr)) {
gradient.setAttribute(attr, referencedGradient.getAttribute(attr));
}
});
if (!gradient.children.length) {
var referenceClone = referencedGradient.cloneNode(true);
while (referenceClone.firstChild) {
gradient.appendChild(referenceClone.firstChild);
}
}
gradient.removeAttribute(xlinkAttr);
}
var reFontDeclaration = new RegExp(
'(normal|italic)?\\s*(normal|small-caps)?\\s*' +
'(normal|bold|bolder|lighter|100|200|300|400|500|600|700|800|900)?\\s*(' +
fabric.reNum +
'(?:px|cm|mm|em|pt|pc|in)*)(?:\\/(normal|' + fabric.reNum + '))?\\s+(.*)');
extend(fabric, {
/**
* Parses a short font declaration, building adding its properties to a style object
* @static
* @function
* @memberOf fabric
* @param {String} value font declaration
* @param {Object} oStyle definition
*/
parseFontDeclaration: function(value, oStyle) {
var match = value.match(reFontDeclaration);
if (!match) {
return;
}
var fontStyle = match[1],
// font variant is not used
// fontVariant = match[2],
fontWeight = match[3],
fontSize = match[4],
lineHeight = match[5],
fontFamily = match[6];
if (fontStyle) {
oStyle.fontStyle = fontStyle;
}
if (fontWeight) {
oStyle.fontWeight = isNaN(parseFloat(fontWeight)) ? fontWeight : parseFloat(fontWeight);
}
if (fontSize) {
oStyle.fontSize = parseUnit(fontSize);
}
if (fontFamily) {
oStyle.fontFamily = fontFamily;
}
if (lineHeight) {
oStyle.lineHeight = lineHeight === 'normal' ? 1 : lineHeight;
}
},
/**
* Parses an SVG document, returning all of the gradient declarations found in it
* @static
* @function
* @memberOf fabric
* @param {SVGDocument} doc SVG document to parse
* @return {Object} Gradient definitions; key corresponds to element id, value -- to gradient definition element
*/
getGradientDefs: function(doc) {
var tagArray = [
'linearGradient',
'radialGradient',
'svg:linearGradient',
'svg:radialGradient'],
elList = _getMultipleNodes(doc, tagArray),
el, j = 0, gradientDefs = { };
j = elList.length;
while (j--) {
el = elList[j];
if (el.getAttribute('xlink:href')) {
recursivelyParseGradientsXlink(doc, el);
}
gradientDefs[el.getAttribute('id')] = el;
}
return gradientDefs;
},
/**
* Returns an object of attributes' name/value, given element and an array of attribute names;
* Parses parent "g" nodes recursively upwards.
* @static
* @memberOf fabric
* @param {DOMElement} element Element to parse
* @param {Array} attributes Array of attributes to parse
* @return {Object} object containing parsed attributes' names/values
*/
parseAttributes: function(element, attributes, svgUid) {
if (!element) {
return;
}
var value,
parentAttributes = { },
fontSize, parentFontSize;
if (typeof svgUid === 'undefined') {
svgUid = element.getAttribute('svgUid');
}
// if there's a parent container (`g` or `a` or `symbol` node), parse its attributes recursively upwards
if (element.parentNode && fabric.svgValidParentsRegEx.test(element.parentNode.nodeName)) {
parentAttributes = fabric.parseAttributes(element.parentNode, attributes, svgUid);
}
var ownAttributes = attributes.reduce(function(memo, attr) {
value = element.getAttribute(attr);
if (value) { // eslint-disable-line
memo[attr] = value;
}
return memo;
}, { });
// add values parsed from style, which take precedence over attributes
// (see: http://www.w3.org/TR/SVG/styling.html#UsingPresentationAttributes)
ownAttributes = extend(ownAttributes,
extend(getGlobalStylesForElement(element, svgUid), fabric.parseStyleAttribute(element)));
fontSize = parentFontSize = parentAttributes.fontSize || fabric.Text.DEFAULT_SVG_FONT_SIZE;
if (ownAttributes['font-size']) {
// looks like the minimum should be 9px when dealing with ems. this is what looks like in browsers.
ownAttributes['font-size'] = fontSize = parseUnit(ownAttributes['font-size'], parentFontSize);
}
var normalizedAttr, normalizedValue, normalizedStyle = {};
for (var attr in ownAttributes) {
normalizedAttr = normalizeAttr(attr);
normalizedValue = normalizeValue(normalizedAttr, ownAttributes[attr], parentAttributes, fontSize);
normalizedStyle[normalizedAttr] = normalizedValue;
}
if (normalizedStyle && normalizedStyle.font) {
fabric.parseFontDeclaration(normalizedStyle.font, normalizedStyle);
}
var mergedAttrs = extend(parentAttributes, normalizedStyle);
return fabric.svgValidParentsRegEx.test(element.nodeName) ? mergedAttrs : _setStrokeFillOpacity(mergedAttrs);
},
/**
* Transforms an array of svg elements to corresponding fabric.* instances
* @static
* @memberOf fabric
* @param {Array} elements Array of elements to parse
* @param {Function} callback Being passed an array of fabric instances (transformed from SVG elements)
* @param {Object} [options] Options object
* @param {Function} [reviver] Method for further parsing of SVG elements, called after each fabric object created.
*/
parseElements: function(elements, callback, options, reviver, parsingOptions) {
new fabric.ElementsParser(elements, callback, options, reviver, parsingOptions).parse();
},
/**
* Parses "style" attribute, retuning an object with values
* @static
* @memberOf fabric
* @param {SVGElement} element Element to parse
* @return {Object} Objects with values parsed from style attribute of an element
*/
parseStyleAttribute: function(element) {
var oStyle = { },
style = element.getAttribute('style');
if (!style) {
return oStyle;
}
if (typeof style === 'string') {
parseStyleString(style, oStyle);
}
else {
parseStyleObject(style, oStyle);
}
return oStyle;
},
/**
* Parses "points" attribute, returning an array of values
* @static
* @memberOf fabric
* @param {String} points points attribute string
* @return {Array} array of points
*/
parsePointsAttribute: function(points) {
// points attribute is required and must not be empty
if (!points) {
return null;
}
// replace commas with whitespace and remove bookending whitespace
points = points.replace(/,/g, ' ').trim();
points = points.split(/\s+/);
var parsedPoints = [], i, len;
for (i = 0, len = points.length; i < len; i += 2) {
parsedPoints.push({
x: parseFloat(points[i]),
y: parseFloat(points[i + 1])
});
}
// odd number of points is an error
// if (parsedPoints.length % 2 !== 0) {
// return null;
// }
return parsedPoints;
},
/**
* Returns CSS rules for a given SVG document
* @static
* @function
* @memberOf fabric
* @param {SVGDocument} doc SVG document to parse
* @return {Object} CSS rules of this document
*/
getCSSRules: function(doc) {
var styles = doc.getElementsByTagName('style'), i, len,
allRules = { }, rules;
// very crude parsing of style contents
for (i = 0, len = styles.length; i < len; i++) {
// IE9 doesn't support textContent, but provides text instead.
var styleContents = styles[i].textContent || styles[i].text;
// remove comments
styleContents = styleContents.replace(/\/\*[\s\S]*?\*\//g, '');
if (styleContents.trim() === '') {
continue;
}
rules = styleContents.match(/[^{]*\{[\s\S]*?\}/g);
rules = rules.map(function(rule) { return rule.trim(); });
// eslint-disable-next-line no-loop-func
rules.forEach(function(rule) {
var match = rule.match(/([\s\S]*?)\s*\{([^}]*)\}/),
ruleObj = { }, declaration = match[2].trim(),
propertyValuePairs = declaration.replace(/;$/, '').split(/\s*;\s*/);
for (i = 0, len = propertyValuePairs.length; i < len; i++) {
var pair = propertyValuePairs[i].split(/\s*:\s*/),
property = pair[0],
value = pair[1];
ruleObj[property] = value;
}
rule = match[1];
rule.split(',').forEach(function(_rule) {
_rule = _rule.replace(/^svg/i, '').trim();
if (_rule === '') {
return;
}
if (allRules[_rule]) {
fabric.util.object.extend(allRules[_rule], ruleObj);
}
else {
allRules[_rule] = fabric.util.object.clone(ruleObj);
}
});
});
}
return allRules;
},
/**
* Takes url corresponding to an SVG document, and parses it into a set of fabric objects.
* Note that SVG is fetched via XMLHttpRequest, so it needs to conform to SOP (Same Origin Policy)
* @memberOf fabric
* @param {String} url
* @param {Function} callback
* @param {Function} [reviver] Method for further parsing of SVG elements, called after each fabric object created.
* @param {Object} [options] Object containing options for parsing
* @param {String} [options.crossOrigin] crossOrigin crossOrigin setting to use for external resources
*/
loadSVGFromURL: function(url, callback, reviver, options) {
url = url.replace(/^\n\s*/, '').trim();
new fabric.util.request(url, {
method: 'get',
onComplete: onComplete
});
function onComplete(r) {
var xml = r.responseXML;
if (xml && !xml.documentElement && fabric.window.ActiveXObject && r.responseText) {
xml = new ActiveXObject('Microsoft.XMLDOM');
xml.async = 'false';
//IE chokes on DOCTYPE
xml.loadXML(r.responseText.replace(/<!DOCTYPE[\s\S]*?(\[[\s\S]*\])*?>/i, ''));
}
if (!xml || !xml.documentElement) {
callback && callback(null);
return false;
}
fabric.parseSVGDocument(xml.documentElement, function (results, _options, elements, allElements) {
callback && callback(results, _options, elements, allElements);
}, reviver, options);
}
},
/**
* Takes string corresponding to an SVG document, and parses it into a set of fabric objects
* @memberOf fabric
* @param {String} string
* @param {Function} callback
* @param {Function} [reviver] Method for further parsing of SVG elements, called after each fabric object created.
* @param {Object} [options] Object containing options for parsing
* @param {String} [options.crossOrigin] crossOrigin crossOrigin setting to use for external resources
*/
loadSVGFromString: function(string, callback, reviver, options) {
string = string.trim();
var doc;
if (typeof fabric.window.DOMParser !== 'undefined') {
var parser = new fabric.window.DOMParser();
if (parser && parser.parseFromString) {
doc = parser.parseFromString(string, 'text/xml');
}
}
else if (fabric.window.ActiveXObject) {
doc = new ActiveXObject('Microsoft.XMLDOM');
doc.async = 'false';
// IE chokes on DOCTYPE
doc.loadXML(string.replace(/<!DOCTYPE[\s\S]*?(\[[\s\S]*\])*?>/i, ''));
}
fabric.parseSVGDocument(doc.documentElement, function (results, _options, elements, allElements) {
callback(results, _options, elements, allElements);
}, reviver, options);
}
});
})(typeof exports !== 'undefined' ? exports : this);
fabric.ElementsParser = function(elements, callback, options, reviver, parsingOptions) {
this.elements = elements;
this.callback = callback;
this.options = options;
this.reviver = reviver;
this.svgUid = (options && options.svgUid) || 0;
this.parsingOptions = parsingOptions;
this.regexUrl = /^url\(['"]?#([^'"]+)['"]?\)/g;
};
(function(proto) {
proto.parse = function() {
this.instances = new Array(this.elements.length);
this.numElements = this.elements.length;
this.createObjects();
};
proto.createObjects = function() {
var _this = this;
this.elements.forEach(function(element, i) {
element.setAttribute('svgUid', _this.svgUid);
_this.createObject(element, i);
});
};
proto.findTag = function(el) {
return fabric[fabric.util.string.capitalize(el.tagName.replace('svg:', ''))];
};
proto.createObject = function(el, index) {
var klass = this.findTag(el);
if (klass && klass.fromElement) {
try {
klass.fromElement(el, this.createCallback(index, el), this.options);
}
catch (err) {
fabric.log(err);
}
}
else {
this.checkIfDone();
}
};
proto.createCallback = function(index, el) {
var _this = this;
return function(obj) {
var _options;
_this.resolveGradient(obj, el, 'fill');
_this.resolveGradient(obj, el, 'stroke');
if (obj instanceof fabric.Image && obj._originalElement) {
_options = obj.parsePreserveAspectRatioAttribute(el);
}
obj._removeTransformMatrix(_options);
_this.resolveClipPath(obj);
_this.reviver && _this.reviver(el, obj);
_this.instances[index] = obj;
_this.checkIfDone();
};
};
proto.extractPropertyDefinition = function(obj, property, storage) {
var value = obj[property];
if (!(/^url\(/).test(value)) {
return;
}
var id = this.regexUrl.exec(value)[1];
this.regexUrl.lastIndex = 0;
return fabric[storage][this.svgUid][id];
};
proto.resolveGradient = function(obj, el, property) {
var gradientDef = this.extractPropertyDefinition(obj, property, 'gradientDefs');
if (gradientDef) {
var opacityAttr = el.getAttribute(property + '-opacity');
var gradient = fabric.Gradient.fromElement(gradientDef, obj, opacityAttr, this.options);
obj.set(property, gradient);
}
};
proto.createClipPathCallback = function(obj, container) {
return function(_newObj) {
_newObj._removeTransformMatrix();
_newObj.fillRule = _newObj.clipRule;
container.push(_newObj);
};
};
proto.resolveClipPath = function(obj) {
var clipPath = this.extractPropertyDefinition(obj, 'clipPath', 'clipPaths'),
element, klass, objTransformInv, container, gTransform, options;
if (clipPath) {
container = [];
objTransformInv = fabric.util.invertTransform(obj.calcTransformMatrix());
for (var i = 0; i < clipPath.length; i++) {
element = clipPath[i];
klass = this.findTag(element);
klass.fromElement(
element,
this.createClipPathCallback(obj, container),
this.options
);
}
if (container.length === 1) {
clipPath = container[0];
}
else {
clipPath = new fabric.Group(container);
}
gTransform = fabric.util.multiplyTransformMatrices(
objTransformInv,
clipPath.calcTransformMatrix()
);
var options = fabric.util.qrDecompose(gTransform);
clipPath.flipX = false;
clipPath.flipY = false;
clipPath.set('scaleX', options.scaleX);
clipPath.set('scaleY', options.scaleY);
clipPath.angle = options.angle;
clipPath.skewX = options.skewX;
clipPath.skewY = 0;
clipPath.setPositionByOrigin({ x: options.translateX, y: options.translateY }, 'center', 'center');
obj.clipPath = clipPath;
}
};
proto.checkIfDone = function() {
if (--this.numElements === 0) {
this.instances = this.instances.filter(function(el) {
// eslint-disable-next-line no-eq-null, eqeqeq
return el != null;
});
this.callback(this.instances, this.elements);
}
};
})(fabric.ElementsParser.prototype);
(function(global) {
'use strict';
/* Adaptation of work of Kevin Lindsey (kevin@kevlindev.com) */
var fabric = global.fabric || (global.fabric = { });
if (fabric.Point) {
fabric.warn('fabric.Point is already defined');
return;
}
fabric.Point = Point;
/**
* Point class
* @class fabric.Point
* @memberOf fabric
* @constructor
* @param {Number} x
* @param {Number} y
* @return {fabric.Point} thisArg
*/
function Point(x, y) {
this.x = x;
this.y = y;
}
Point.prototype = /** @lends fabric.Point.prototype */ {
type: 'point',
constructor: Point,
/**
* Adds another point to this one and returns another one
* @param {fabric.Point} that
* @return {fabric.Point} new Point instance with added values
*/
add: function (that) {
return new Point(this.x + that.x, this.y + that.y);
},
/**
* Adds another point to this one
* @param {fabric.Point} that
* @return {fabric.Point} thisArg
* @chainable
*/
addEquals: function (that) {
this.x += that.x;
this.y += that.y;
return this;
},
/**
* Adds value to this point and returns a new one
* @param {Number} scalar
* @return {fabric.Point} new Point with added value
*/
scalarAdd: function (scalar) {
return new Point(this.x + scalar, this.y + scalar);
},
/**
* Adds value to this point
* @param {Number} scalar
* @return {fabric.Point} thisArg
* @chainable
*/
scalarAddEquals: function (scalar) {
this.x += scalar;
this.y += scalar;
return this;
},
/**
* Subtracts another point from this point and returns a new one
* @param {fabric.Point} that
* @return {fabric.Point} new Point object with subtracted values
*/
subtract: function (that) {
return new Point(this.x - that.x, this.y - that.y);
},
/**
* Subtracts another point from this point
* @param {fabric.Point} that
* @return {fabric.Point} thisArg
* @chainable
*/
subtractEquals: function (that) {
this.x -= that.x;
this.y -= that.y;
return this;
},
/**
* Subtracts value from this point and returns a new one
* @param {Number} scalar
* @return {fabric.Point}
*/
scalarSubtract: function (scalar) {
return new Point(this.x - scalar, this.y - scalar);
},
/**
* Subtracts value from this point
* @param {Number} scalar
* @return {fabric.Point} thisArg
* @chainable
*/
scalarSubtractEquals: function (scalar) {
this.x -= scalar;
this.y -= scalar;
return this;
},
/**
* Multiplies this point by a value and returns a new one
* TODO: rename in scalarMultiply in 2.0
* @param {Number} scalar
* @return {fabric.Point}
*/
multiply: function (scalar) {
return new Point(this.x * scalar, this.y * scalar);
},
/**
* Multiplies this point by a value
* TODO: rename in scalarMultiplyEquals in 2.0
* @param {Number} scalar
* @return {fabric.Point} thisArg
* @chainable
*/
multiplyEquals: function (scalar) {
this.x *= scalar;
this.y *= scalar;
return this;
},
/**
* Divides this point by a value and returns a new one
* TODO: rename in scalarDivide in 2.0
* @param {Number} scalar
* @return {fabric.Point}
*/
divide: function (scalar) {
return new Point(this.x / scalar, this.y / scalar);
},
/**
* Divides this point by a value
* TODO: rename in scalarDivideEquals in 2.0
* @param {Number} scalar
* @return {fabric.Point} thisArg
* @chainable
*/
divideEquals: function (scalar) {
this.x /= scalar;
this.y /= scalar;
return this;
},
/**
* Returns true if this point is equal to another one
* @param {fabric.Point} that
* @return {Boolean}
*/
eq: function (that) {
return (this.x === that.x && this.y === that.y);
},
/**
* Returns true if this point is less than another one
* @param {fabric.Point} that
* @return {Boolean}
*/
lt: function (that) {
return (this.x < that.x && this.y < that.y);
},
/**
* Returns true if this point is less than or equal to another one
* @param {fabric.Point} that
* @return {Boolean}
*/
lte: function (that) {
return (this.x <= that.x && this.y <= that.y);
},
/**
* Returns true if this point is greater another one
* @param {fabric.Point} that
* @return {Boolean}
*/
gt: function (that) {
return (this.x > that.x && this.y > that.y);
},
/**
* Returns true if this point is greater than or equal to another one
* @param {fabric.Point} that
* @return {Boolean}
*/
gte: function (that) {
return (this.x >= that.x && this.y >= that.y);
},
/**
* Returns new point which is the result of linear interpolation with this one and another one
* @param {fabric.Point} that
* @param {Number} t , position of interpolation, between 0 and 1 default 0.5
* @return {fabric.Point}
*/
lerp: function (that, t) {
if (typeof t === 'undefined') {
t = 0.5;
}
t = Math.max(Math.min(1, t), 0);
return new Point(this.x + (that.x - this.x) * t, this.y + (that.y - this.y) * t);
},
/**
* Returns distance from this point and another one
* @param {fabric.Point} that
* @return {Number}
*/
distanceFrom: function (that) {
var dx = this.x - that.x,
dy = this.y - that.y;
return Math.sqrt(dx * dx + dy * dy);
},
/**
* Returns the point between this point and another one
* @param {fabric.Point} that
* @return {fabric.Point}
*/
midPointFrom: function (that) {
return this.lerp(that);
},
/**
* Returns a new point which is the min of this and another one
* @param {fabric.Point} that
* @return {fabric.Point}
*/
min: function (that) {
return new Point(Math.min(this.x, that.x), Math.min(this.y, that.y));
},
/**
* Returns a new point which is the max of this and another one
* @param {fabric.Point} that
* @return {fabric.Point}
*/
max: function (that) {
return new Point(Math.max(this.x, that.x), Math.max(this.y, that.y));
},
/**
* Returns string representation of this point
* @return {String}
*/
toString: function () {
return this.x + ',' + this.y;
},
/**
* Sets x/y of this point
* @param {Number} x
* @param {Number} y
* @chainable
*/
setXY: function (x, y) {
this.x = x;
this.y = y;
return this;
},
/**
* Sets x of this point
* @param {Number} x
* @chainable
*/
setX: function (x) {
this.x = x;
return this;
},
/**
* Sets y of this point
* @param {Number} y
* @chainable
*/
setY: function (y) {
this.y = y;
return this;
},
/**
* Sets x/y of this point from another point
* @param {fabric.Point} that
* @chainable
*/
setFromPoint: function (that) {
this.x = that.x;
this.y = that.y;
return this;
},
/**
* Swaps x/y of this point and another point
* @param {fabric.Point} that
*/
swap: function (that) {
var x = this.x,
y = this.y;
this.x = that.x;
this.y = that.y;
that.x = x;
that.y = y;
},
/**
* return a cloned instance of the point
* @return {fabric.Point}
*/
clone: function () {
return new Point(this.x, this.y);
}
};
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
'use strict';
/* Adaptation of work of Kevin Lindsey (kevin@kevlindev.com) */
var fabric = global.fabric || (global.fabric = { });
if (fabric.Intersection) {
fabric.warn('fabric.Intersection is already defined');
return;
}
/**
* Intersection class
* @class fabric.Intersection
* @memberOf fabric
* @constructor
*/
function Intersection(status) {
this.status = status;
this.points = [];
}
fabric.Intersection = Intersection;
fabric.Intersection.prototype = /** @lends fabric.Intersection.prototype */ {
constructor: Intersection,
/**
* Appends a point to intersection
* @param {fabric.Point} point
* @return {fabric.Intersection} thisArg
* @chainable
*/
appendPoint: function (point) {
this.points.push(point);
return this;
},
/**
* Appends points to intersection
* @param {Array} points
* @return {fabric.Intersection} thisArg
* @chainable
*/
appendPoints: function (points) {
this.points = this.points.concat(points);
return this;
}
};
/**
* Checks if one line intersects another
* TODO: rename in intersectSegmentSegment
* @static
* @param {fabric.Point} a1
* @param {fabric.Point} a2
* @param {fabric.Point} b1
* @param {fabric.Point} b2
* @return {fabric.Intersection}
*/
fabric.Intersection.intersectLineLine = function (a1, a2, b1, b2) {
var result,
uaT = (b2.x - b1.x) * (a1.y - b1.y) - (b2.y - b1.y) * (a1.x - b1.x),
ubT = (a2.x - a1.x) * (a1.y - b1.y) - (a2.y - a1.y) * (a1.x - b1.x),
uB = (b2.y - b1.y) * (a2.x - a1.x) - (b2.x - b1.x) * (a2.y - a1.y);
if (uB !== 0) {
var ua = uaT / uB,
ub = ubT / uB;
if (0 <= ua && ua <= 1 && 0 <= ub && ub <= 1) {
result = new Intersection('Intersection');
result.appendPoint(new fabric.Point(a1.x + ua * (a2.x - a1.x), a1.y + ua * (a2.y - a1.y)));
}
else {
result = new Intersection();
}
}
else {
if (uaT === 0 || ubT === 0) {
result = new Intersection('Coincident');
}
else {
result = new Intersection('Parallel');
}
}
return result;
};
/**
* Checks if line intersects polygon
* TODO: rename in intersectSegmentPolygon
* fix detection of coincident
* @static
* @param {fabric.Point} a1
* @param {fabric.Point} a2
* @param {Array} points
* @return {fabric.Intersection}
*/
fabric.Intersection.intersectLinePolygon = function(a1, a2, points) {
var result = new Intersection(),
length = points.length,
b1, b2, inter, i;
for (i = 0; i < length; i++) {
b1 = points[i];
b2 = points[(i + 1) % length];
inter = Intersection.intersectLineLine(a1, a2, b1, b2);
result.appendPoints(inter.points);
}
if (result.points.length > 0) {
result.status = 'Intersection';
}
return result;
};
/**
* Checks if polygon intersects another polygon
* @static
* @param {Array} points1
* @param {Array} points2
* @return {fabric.Intersection}
*/
fabric.Intersection.intersectPolygonPolygon = function (points1, points2) {
var result = new Intersection(),
length = points1.length, i;
for (i = 0; i < length; i++) {
var a1 = points1[i],
a2 = points1[(i + 1) % length],
inter = Intersection.intersectLinePolygon(a1, a2, points2);
result.appendPoints(inter.points);
}
if (result.points.length > 0) {
result.status = 'Intersection';
}
return result;
};
/**
* Checks if polygon intersects rectangle
* @static
* @param {Array} points
* @param {fabric.Point} r1
* @param {fabric.Point} r2
* @return {fabric.Intersection}
*/
fabric.Intersection.intersectPolygonRectangle = function (points, r1, r2) {
var min = r1.min(r2),
max = r1.max(r2),
topRight = new fabric.Point(max.x, min.y),
bottomLeft = new fabric.Point(min.x, max.y),
inter1 = Intersection.intersectLinePolygon(min, topRight, points),
inter2 = Intersection.intersectLinePolygon(topRight, max, points),
inter3 = Intersection.intersectLinePolygon(max, bottomLeft, points),
inter4 = Intersection.intersectLinePolygon(bottomLeft, min, points),
result = new Intersection();
result.appendPoints(inter1.points);
result.appendPoints(inter2.points);
result.appendPoints(inter3.points);
result.appendPoints(inter4.points);
if (result.points.length > 0) {
result.status = 'Intersection';
}
return result;
};
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
'use strict';
var fabric = global.fabric || (global.fabric = { });
if (fabric.Color) {
fabric.warn('fabric.Color is already defined.');
return;
}
/**
* Color class
* The purpose of {@link fabric.Color} is to abstract and encapsulate common color operations;
* {@link fabric.Color} is a constructor and creates instances of {@link fabric.Color} objects.
*
* @class fabric.Color
* @param {String} color optional in hex or rgb(a) or hsl format or from known color list
* @return {fabric.Color} thisArg
* @tutorial {@link http://fabricjs.com/fabric-intro-part-2/#colors}
*/
function Color(color) {
if (!color) {
this.setSource([0, 0, 0, 1]);
}
else {
this._tryParsingColor(color);
}
}
fabric.Color = Color;
fabric.Color.prototype = /** @lends fabric.Color.prototype */ {
/**
* @private
* @param {String|Array} color Color value to parse
*/
_tryParsingColor: function(color) {
var source;
if (color in Color.colorNameMap) {
color = Color.colorNameMap[color];
}
if (color === 'transparent') {
source = [255, 255, 255, 0];
}
if (!source) {
source = Color.sourceFromHex(color);
}
if (!source) {
source = Color.sourceFromRgb(color);
}
if (!source) {
source = Color.sourceFromHsl(color);
}
if (!source) {
//if color is not recognize let's make black as canvas does
source = [0, 0, 0, 1];
}
if (source) {
this.setSource(source);
}
},
/**
* Adapted from <a href="https://rawgithub.com/mjijackson/mjijackson.github.com/master/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript.html">https://github.com/mjijackson</a>
* @private
* @param {Number} r Red color value
* @param {Number} g Green color value
* @param {Number} b Blue color value
* @return {Array} Hsl color
*/
_rgbToHsl: function(r, g, b) {
r /= 255; g /= 255; b /= 255;
var h, s, l,
max = fabric.util.array.max([r, g, b]),
min = fabric.util.array.min([r, g, b]);
l = (max + min) / 2;
if (max === min) {
h = s = 0; // achromatic
}
else {
var d = max - min;
s = l > 0.5 ? d / (2 - max - min) : d / (max + min);
switch (max) {
case r:
h = (g - b) / d + (g < b ? 6 : 0);
break;
case g:
h = (b - r) / d + 2;
break;
case b:
h = (r - g) / d + 4;
break;
}
h /= 6;
}
return [
Math.round(h * 360),
Math.round(s * 100),
Math.round(l * 100)
];
},
/**
* Returns source of this color (where source is an array representation; ex: [200, 200, 100, 1])
* @return {Array}
*/
getSource: function() {
return this._source;
},
/**
* Sets source of this color (where source is an array representation; ex: [200, 200, 100, 1])
* @param {Array} source
*/
setSource: function(source) {
this._source = source;
},
/**
* Returns color representation in RGB format
* @return {String} ex: rgb(0-255,0-255,0-255)
*/
toRgb: function() {
var source = this.getSource();
return 'rgb(' + source[0] + ',' + source[1] + ',' + source[2] + ')';
},
/**
* Returns color representation in RGBA format
* @return {String} ex: rgba(0-255,0-255,0-255,0-1)
*/
toRgba: function() {
var source = this.getSource();
return 'rgba(' + source[0] + ',' + source[1] + ',' + source[2] + ',' + source[3] + ')';
},
/**
* Returns color representation in HSL format
* @return {String} ex: hsl(0-360,0%-100%,0%-100%)
*/
toHsl: function() {
var source = this.getSource(),
hsl = this._rgbToHsl(source[0], source[1], source[2]);
return 'hsl(' + hsl[0] + ',' + hsl[1] + '%,' + hsl[2] + '%)';
},
/**
* Returns color representation in HSLA format
* @return {String} ex: hsla(0-360,0%-100%,0%-100%,0-1)
*/
toHsla: function() {
var source = this.getSource(),
hsl = this._rgbToHsl(source[0], source[1], source[2]);
return 'hsla(' + hsl[0] + ',' + hsl[1] + '%,' + hsl[2] + '%,' + source[3] + ')';
},
/**
* Returns color representation in HEX format
* @return {String} ex: FF5555
*/
toHex: function() {
var source = this.getSource(), r, g, b;
r = source[0].toString(16);
r = (r.length === 1) ? ('0' + r) : r;
g = source[1].toString(16);
g = (g.length === 1) ? ('0' + g) : g;
b = source[2].toString(16);
b = (b.length === 1) ? ('0' + b) : b;
return r.toUpperCase() + g.toUpperCase() + b.toUpperCase();
},
/**
* Returns color representation in HEXA format
* @return {String} ex: FF5555CC
*/
toHexa: function() {
var source = this.getSource(), a;
a = Math.round(source[3] * 255);
a = a.toString(16);
a = (a.length === 1) ? ('0' + a) : a;
return this.toHex() + a.toUpperCase();
},
/**
* Gets value of alpha channel for this color
* @return {Number} 0-1
*/
getAlpha: function() {
return this.getSource()[3];
},
/**
* Sets value of alpha channel for this color
* @param {Number} alpha Alpha value 0-1
* @return {fabric.Color} thisArg
*/
setAlpha: function(alpha) {
var source = this.getSource();
source[3] = alpha;
this.setSource(source);
return this;
},
/**
* Transforms color to its grayscale representation
* @return {fabric.Color} thisArg
*/
toGrayscale: function() {
var source = this.getSource(),
average = parseInt((source[0] * 0.3 + source[1] * 0.59 + source[2] * 0.11).toFixed(0), 10),
currentAlpha = source[3];
this.setSource([average, average, average, currentAlpha]);
return this;
},
/**
* Transforms color to its black and white representation
* @param {Number} threshold
* @return {fabric.Color} thisArg
*/
toBlackWhite: function(threshold) {
var source = this.getSource(),
average = (source[0] * 0.3 + source[1] * 0.59 + source[2] * 0.11).toFixed(0),
currentAlpha = source[3];
threshold = threshold || 127;
average = (Number(average) < Number(threshold)) ? 0 : 255;
this.setSource([average, average, average, currentAlpha]);
return this;
},
/**
* Overlays color with another color
* @param {String|fabric.Color} otherColor
* @return {fabric.Color} thisArg
*/
overlayWith: function(otherColor) {
if (!(otherColor instanceof Color)) {
otherColor = new Color(otherColor);
}
var result = [],
alpha = this.getAlpha(),
otherAlpha = 0.5,
source = this.getSource(),
otherSource = otherColor.getSource(), i;
for (i = 0; i < 3; i++) {
result.push(Math.round((source[i] * (1 - otherAlpha)) + (otherSource[i] * otherAlpha)));
}
result[3] = alpha;
this.setSource(result);
return this;
}
};
/**
* Regex matching color in RGB or RGBA formats (ex: rgb(0, 0, 0), rgba(255, 100, 10, 0.5), rgba( 255 , 100 , 10 , 0.5 ), rgb(1,1,1), rgba(100%, 60%, 10%, 0.5))
* @static
* @field
* @memberOf fabric.Color
*/
// eslint-disable-next-line max-len
fabric.Color.reRGBa = /^rgba?\(\s*(\d{1,3}(?:\.\d+)?\%?)\s*,\s*(\d{1,3}(?:\.\d+)?\%?)\s*,\s*(\d{1,3}(?:\.\d+)?\%?)\s*(?:\s*,\s*((?:\d*\.?\d+)?)\s*)?\)$/i;
/**
* Regex matching color in HSL or HSLA formats (ex: hsl(200, 80%, 10%), hsla(300, 50%, 80%, 0.5), hsla( 300 , 50% , 80% , 0.5 ))
* @static
* @field
* @memberOf fabric.Color
*/
fabric.Color.reHSLa = /^hsla?\(\s*(\d{1,3})\s*,\s*(\d{1,3}\%)\s*,\s*(\d{1,3}\%)\s*(?:\s*,\s*(\d+(?:\.\d+)?)\s*)?\)$/i;
/**
* Regex matching color in HEX format (ex: #FF5544CC, #FF5555, 010155, aff)
* @static
* @field
* @memberOf fabric.Color
*/
fabric.Color.reHex = /^#?([0-9a-f]{8}|[0-9a-f]{6}|[0-9a-f]{4}|[0-9a-f]{3})$/i;
/**
* Map of the 148 color names with HEX code
* @static
* @field
* @memberOf fabric.Color
* @see: https://www.w3.org/TR/css3-color/#svg-color
*/
fabric.Color.colorNameMap = {
aliceblue: '#F0F8FF',
antiquewhite: '#FAEBD7',
aqua: '#00FFFF',
aquamarine: '#7FFFD4',
azure: '#F0FFFF',
beige: '#F5F5DC',
bisque: '#FFE4C4',
black: '#000000',
blanchedalmond: '#FFEBCD',
blue: '#0000FF',
blueviolet: '#8A2BE2',
brown: '#A52A2A',
burlywood: '#DEB887',
cadetblue: '#5F9EA0',
chartreuse: '#7FFF00',
chocolate: '#D2691E',
coral: '#FF7F50',
cornflowerblue: '#6495ED',
cornsilk: '#FFF8DC',
crimson: '#DC143C',
cyan: '#00FFFF',
darkblue: '#00008B',
darkcyan: '#008B8B',
darkgoldenrod: '#B8860B',
darkgray: '#A9A9A9',
darkgrey: '#A9A9A9',
darkgreen: '#006400',
darkkhaki: '#BDB76B',
darkmagenta: '#8B008B',
darkolivegreen: '#556B2F',
darkorange: '#FF8C00',
darkorchid: '#9932CC',
darkred: '#8B0000',
darksalmon: '#E9967A',
darkseagreen: '#8FBC8F',
darkslateblue: '#483D8B',
darkslategray: '#2F4F4F',
darkslategrey: '#2F4F4F',
darkturquoise: '#00CED1',
darkviolet: '#9400D3',
deeppink: '#FF1493',
deepskyblue: '#00BFFF',
dimgray: '#696969',
dimgrey: '#696969',
dodgerblue: '#1E90FF',
firebrick: '#B22222',
floralwhite: '#FFFAF0',
forestgreen: '#228B22',
fuchsia: '#FF00FF',
gainsboro: '#DCDCDC',
ghostwhite: '#F8F8FF',
gold: '#FFD700',
goldenrod: '#DAA520',
gray: '#808080',
grey: '#808080',
green: '#008000',
greenyellow: '#ADFF2F',
honeydew: '#F0FFF0',
hotpink: '#FF69B4',
indianred: '#CD5C5C',
indigo: '#4B0082',
ivory: '#FFFFF0',
khaki: '#F0E68C',
lavender: '#E6E6FA',
lavenderblush: '#FFF0F5',
lawngreen: '#7CFC00',
lemonchiffon: '#FFFACD',
lightblue: '#ADD8E6',
lightcoral: '#F08080',
lightcyan: '#E0FFFF',
lightgoldenrodyellow: '#FAFAD2',
lightgray: '#D3D3D3',
lightgrey: '#D3D3D3',
lightgreen: '#90EE90',
lightpink: '#FFB6C1',
lightsalmon: '#FFA07A',
lightseagreen: '#20B2AA',
lightskyblue: '#87CEFA',
lightslategray: '#778899',
lightslategrey: '#778899',
lightsteelblue: '#B0C4DE',
lightyellow: '#FFFFE0',
lime: '#00FF00',
limegreen: '#32CD32',
linen: '#FAF0E6',
magenta: '#FF00FF',
maroon: '#800000',
mediumaquamarine: '#66CDAA',
mediumblue: '#0000CD',
mediumorchid: '#BA55D3',
mediumpurple: '#9370DB',
mediumseagreen: '#3CB371',
mediumslateblue: '#7B68EE',
mediumspringgreen: '#00FA9A',
mediumturquoise: '#48D1CC',
mediumvioletred: '#C71585',
midnightblue: '#191970',
mintcream: '#F5FFFA',
mistyrose: '#FFE4E1',
moccasin: '#FFE4B5',
navajowhite: '#FFDEAD',
navy: '#000080',
oldlace: '#FDF5E6',
olive: '#808000',
olivedrab: '#6B8E23',
orange: '#FFA500',
orangered: '#FF4500',
orchid: '#DA70D6',
palegoldenrod: '#EEE8AA',
palegreen: '#98FB98',
paleturquoise: '#AFEEEE',
palevioletred: '#DB7093',
papayawhip: '#FFEFD5',
peachpuff: '#FFDAB9',
peru: '#CD853F',
pink: '#FFC0CB',
plum: '#DDA0DD',
powderblue: '#B0E0E6',
purple: '#800080',
rebeccapurple: '#663399',
red: '#FF0000',
rosybrown: '#BC8F8F',
royalblue: '#4169E1',
saddlebrown: '#8B4513',
salmon: '#FA8072',
sandybrown: '#F4A460',
seagreen: '#2E8B57',
seashell: '#FFF5EE',
sienna: '#A0522D',
silver: '#C0C0C0',
skyblue: '#87CEEB',
slateblue: '#6A5ACD',
slategray: '#708090',
slategrey: '#708090',
snow: '#FFFAFA',
springgreen: '#00FF7F',
steelblue: '#4682B4',
tan: '#D2B48C',
teal: '#008080',
thistle: '#D8BFD8',
tomato: '#FF6347',
turquoise: '#40E0D0',
violet: '#EE82EE',
wheat: '#F5DEB3',
white: '#FFFFFF',
whitesmoke: '#F5F5F5',
yellow: '#FFFF00',
yellowgreen: '#9ACD32'
};
/**
* @private
* @param {Number} p
* @param {Number} q
* @param {Number} t
* @return {Number}
*/
function hue2rgb(p, q, t) {
if (t < 0) {
t += 1;
}
if (t > 1) {
t -= 1;
}
if (t < 1 / 6) {
return p + (q - p) * 6 * t;
}
if (t < 1 / 2) {
return q;
}
if (t < 2 / 3) {
return p + (q - p) * (2 / 3 - t) * 6;
}
return p;
}
/**
* Returns new color object, when given a color in RGB format
* @memberOf fabric.Color
* @param {String} color Color value ex: rgb(0-255,0-255,0-255)
* @return {fabric.Color}
*/
fabric.Color.fromRgb = function(color) {
return Color.fromSource(Color.sourceFromRgb(color));
};
/**
* Returns array representation (ex: [100, 100, 200, 1]) of a color that's in RGB or RGBA format
* @memberOf fabric.Color
* @param {String} color Color value ex: rgb(0-255,0-255,0-255), rgb(0%-100%,0%-100%,0%-100%)
* @return {Array} source
*/
fabric.Color.sourceFromRgb = function(color) {
var match = color.match(Color.reRGBa);
if (match) {
var r = parseInt(match[1], 10) / (/%$/.test(match[1]) ? 100 : 1) * (/%$/.test(match[1]) ? 255 : 1),
g = parseInt(match[2], 10) / (/%$/.test(match[2]) ? 100 : 1) * (/%$/.test(match[2]) ? 255 : 1),
b = parseInt(match[3], 10) / (/%$/.test(match[3]) ? 100 : 1) * (/%$/.test(match[3]) ? 255 : 1);
return [
parseInt(r, 10),
parseInt(g, 10),
parseInt(b, 10),
match[4] ? parseFloat(match[4]) : 1
];
}
};
/**
* Returns new color object, when given a color in RGBA format
* @static
* @function
* @memberOf fabric.Color
* @param {String} color
* @return {fabric.Color}
*/
fabric.Color.fromRgba = Color.fromRgb;
/**
* Returns new color object, when given a color in HSL format
* @param {String} color Color value ex: hsl(0-260,0%-100%,0%-100%)
* @memberOf fabric.Color
* @return {fabric.Color}
*/
fabric.Color.fromHsl = function(color) {
return Color.fromSource(Color.sourceFromHsl(color));
};
/**
* Returns array representation (ex: [100, 100, 200, 1]) of a color that's in HSL or HSLA format.
* Adapted from <a href="https://rawgithub.com/mjijackson/mjijackson.github.com/master/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript.html">https://github.com/mjijackson</a>
* @memberOf fabric.Color
* @param {String} color Color value ex: hsl(0-360,0%-100%,0%-100%) or hsla(0-360,0%-100%,0%-100%, 0-1)
* @return {Array} source
* @see http://http://www.w3.org/TR/css3-color/#hsl-color
*/
fabric.Color.sourceFromHsl = function(color) {
var match = color.match(Color.reHSLa);
if (!match) {
return;
}
var h = (((parseFloat(match[1]) % 360) + 360) % 360) / 360,
s = parseFloat(match[2]) / (/%$/.test(match[2]) ? 100 : 1),
l = parseFloat(match[3]) / (/%$/.test(match[3]) ? 100 : 1),
r, g, b;
if (s === 0) {
r = g = b = l;
}
else {
var q = l <= 0.5 ? l * (s + 1) : l + s - l * s,
p = l * 2 - q;
r = hue2rgb(p, q, h + 1 / 3);
g = hue2rgb(p, q, h);
b = hue2rgb(p, q, h - 1 / 3);
}
return [
Math.round(r * 255),
Math.round(g * 255),
Math.round(b * 255),
match[4] ? parseFloat(match[4]) : 1
];
};
/**
* Returns new color object, when given a color in HSLA format
* @static
* @function
* @memberOf fabric.Color
* @param {String} color
* @return {fabric.Color}
*/
fabric.Color.fromHsla = Color.fromHsl;
/**
* Returns new color object, when given a color in HEX format
* @static
* @memberOf fabric.Color
* @param {String} color Color value ex: FF5555
* @return {fabric.Color}
*/
fabric.Color.fromHex = function(color) {
return Color.fromSource(Color.sourceFromHex(color));
};
/**
* Returns array representation (ex: [100, 100, 200, 1]) of a color that's in HEX format
* @static
* @memberOf fabric.Color
* @param {String} color ex: FF5555 or FF5544CC (RGBa)
* @return {Array} source
*/
fabric.Color.sourceFromHex = function(color) {
if (color.match(Color.reHex)) {
var value = color.slice(color.indexOf('#') + 1),
isShortNotation = (value.length === 3 || value.length === 4),
isRGBa = (value.length === 8 || value.length === 4),
r = isShortNotation ? (value.charAt(0) + value.charAt(0)) : value.substring(0, 2),
g = isShortNotation ? (value.charAt(1) + value.charAt(1)) : value.substring(2, 4),
b = isShortNotation ? (value.charAt(2) + value.charAt(2)) : value.substring(4, 6),
a = isRGBa ? (isShortNotation ? (value.charAt(3) + value.charAt(3)) : value.substring(6, 8)) : 'FF';
return [
parseInt(r, 16),
parseInt(g, 16),
parseInt(b, 16),
parseFloat((parseInt(a, 16) / 255).toFixed(2))
];
}
};
/**
* Returns new color object, when given color in array representation (ex: [200, 100, 100, 0.5])
* @static
* @memberOf fabric.Color
* @param {Array} source
* @return {fabric.Color}
*/
fabric.Color.fromSource = function(source) {
var oColor = new Color();
oColor.setSource(source);
return oColor;
};
})(typeof exports !== 'undefined' ? exports : this);
(function() {
/* _FROM_SVG_START_ */
function getColorStop(el, multiplier) {
var style = el.getAttribute('style'),
offset = el.getAttribute('offset') || 0,
color, colorAlpha, opacity, i;
// convert percents to absolute values
offset = parseFloat(offset) / (/%$/.test(offset) ? 100 : 1);
offset = offset < 0 ? 0 : offset > 1 ? 1 : offset;
if (style) {
var keyValuePairs = style.split(/\s*;\s*/);
if (keyValuePairs[keyValuePairs.length - 1] === '') {
keyValuePairs.pop();
}
for (i = keyValuePairs.length; i--; ) {
var split = keyValuePairs[i].split(/\s*:\s*/),
key = split[0].trim(),
value = split[1].trim();
if (key === 'stop-color') {
color = value;
}
else if (key === 'stop-opacity') {
opacity = value;
}
}
}
if (!color) {
color = el.getAttribute('stop-color') || 'rgb(0,0,0)';
}
if (!opacity) {
opacity = el.getAttribute('stop-opacity');
}
color = new fabric.Color(color);
colorAlpha = color.getAlpha();
opacity = isNaN(parseFloat(opacity)) ? 1 : parseFloat(opacity);
opacity *= colorAlpha * multiplier;
return {
offset: offset,
color: color.toRgb(),
opacity: opacity
};
}
function getLinearCoords(el) {
return {
x1: el.getAttribute('x1') || 0,
y1: el.getAttribute('y1') || 0,
x2: el.getAttribute('x2') || '100%',
y2: el.getAttribute('y2') || 0
};
}
function getRadialCoords(el) {
return {
x1: el.getAttribute('fx') || el.getAttribute('cx') || '50%',
y1: el.getAttribute('fy') || el.getAttribute('cy') || '50%',
r1: 0,
x2: el.getAttribute('cx') || '50%',
y2: el.getAttribute('cy') || '50%',
r2: el.getAttribute('r') || '50%'
};
}
/* _FROM_SVG_END_ */
var clone = fabric.util.object.clone;
/**
* Gradient class
* @class fabric.Gradient
* @tutorial {@link http://fabricjs.com/fabric-intro-part-2#gradients}
* @see {@link fabric.Gradient#initialize} for constructor definition
*/
fabric.Gradient = fabric.util.createClass(/** @lends fabric.Gradient.prototype */ {
/**
* Horizontal offset for aligning gradients coming from SVG when outside pathgroups
* @type Number
* @default 0
*/
offsetX: 0,
/**
* Vertical offset for aligning gradients coming from SVG when outside pathgroups
* @type Number
* @default 0
*/
offsetY: 0,
/**
* A transform matrix to apply to the gradient before painting.
* Imported from svg gradients, is not applied with the current transform in the center.
* Before this transform is applied, the origin point is at the top left corner of the object
* plus the addition of offsetY and offsetX.
* @type Array[Number]
* @default null
*/
gradientTransform: null,
/**
* coordinates units for coords.
* If `pixels`, the number of coords are in the same unit of width / height.
* If set as `percentage` the coords are still a number, but 1 means 100% of width
* for the X and 100% of the height for the y. It can be bigger than 1 and negative.
* @type String pixels || percentage
* @default 'pixels'
*/
gradientUnits: 'pixels',
/**
* Gradient type
* @type String linear || radial
* @default 'pixels'
*/
type: 'linear',
/**
* Constructor
* @param {Object} options Options object with type, coords, gradientUnits and colorStops
* @param {Object} [options.type] gradient type linear or radial
* @param {Object} [options.gradientUnits] gradient units
* @param {Object} [options.offsetX] SVG import compatibility
* @param {Object} [options.offsetY] SVG import compatibility
* @param {Array[Object]} options.colorStops contains the colorstops.
* @param {Object} options.coords contains the coords of the gradient
* @param {Number} [options.coords.x1] X coordiante of the first point for linear or of the focal point for radial
* @param {Number} [options.coords.y1] Y coordiante of the first point for linear or of the focal point for radial
* @param {Number} [options.coords.x2] X coordiante of the second point for linear or of the center point for radial
* @param {Number} [options.coords.y2] Y coordiante of the second point for linear or of the center point for radial
* @param {Number} [options.coords.r1] only for radial gradient, radius of the inner circle
* @param {Number} [options.coords.r2] only for radial gradient, radius of the external circle
* @return {fabric.Gradient} thisArg
*/
initialize: function(options) {
options || (options = { });
options.coords || (options.coords = { });
var coords, _this = this;
// sets everything, then coords and colorstops get sets again
Object.keys(options).forEach(function(option) {
_this[option] = options[option];
});
if (this.id) {
this.id += '_' + fabric.Object.__uid++;
}
else {
this.id = fabric.Object.__uid++;
}
coords = {
x1: options.coords.x1 || 0,
y1: options.coords.y1 || 0,
x2: options.coords.x2 || 0,
y2: options.coords.y2 || 0
};
if (this.type === 'radial') {
coords.r1 = options.coords.r1 || 0;
coords.r2 = options.coords.r2 || 0;
}
this.coords = coords;
this.colorStops = options.colorStops.slice();
},
/**
* Adds another colorStop
* @param {Object} colorStop Object with offset and color
* @return {fabric.Gradient} thisArg
*/
addColorStop: function(colorStops) {
for (var position in colorStops) {
var color = new fabric.Color(colorStops[position]);
this.colorStops.push({
offset: parseFloat(position),
color: color.toRgb(),
opacity: color.getAlpha()
});
}
return this;
},
/**
* Returns object representation of a gradient
* @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output
* @return {Object}
*/
toObject: function(propertiesToInclude) {
var object = {
type: this.type,
coords: this.coords,
colorStops: this.colorStops,
offsetX: this.offsetX,
offsetY: this.offsetY,
gradientUnits: this.gradientUnits,
gradientTransform: this.gradientTransform ? this.gradientTransform.concat() : this.gradientTransform
};
fabric.util.populateWithProperties(this, object, propertiesToInclude);
return object;
},
/* _TO_SVG_START_ */
/**
* Returns SVG representation of an gradient
* @param {Object} object Object to create a gradient for
* @return {String} SVG representation of an gradient (linear/radial)
*/
toSVG: function(object, options) {
var coords = clone(this.coords, true), i, len, options = options || {},
markup, commonAttributes, colorStops = clone(this.colorStops, true),
needsSwap = coords.r1 > coords.r2,
transform = this.gradientTransform ? this.gradientTransform.concat() : fabric.iMatrix.concat(),
offsetX = -this.offsetX, offsetY = -this.offsetY,
withViewport = !!options.additionalTransform,
gradientUnits = this.gradientUnits === 'pixels' ? 'userSpaceOnUse' : 'objectBoundingBox';
// colorStops must be sorted ascending
colorStops.sort(function(a, b) {
return a.offset - b.offset;
});
if (gradientUnits === 'objectBoundingBox') {
offsetX /= object.width;
offsetY /= object.height;
}
else {
offsetX += object.width / 2;
offsetY += object.height / 2;
}
if (object.type === 'path') {
offsetX -= object.pathOffset.x;
offsetY -= object.pathOffset.y;
}
transform[4] -= offsetX;
transform[5] -= offsetY;
commonAttributes = 'id="SVGID_' + this.id +
'" gradientUnits="' + gradientUnits + '"';
commonAttributes += ' gradientTransform="' + (withViewport ?
options.additionalTransform + ' ' : '') + fabric.util.matrixToSVG(transform) + '" ';
if (this.type === 'linear') {
markup = [
'<linearGradient ',
commonAttributes,
' x1="', coords.x1,
'" y1="', coords.y1,
'" x2="', coords.x2,
'" y2="', coords.y2,
'">\n'
];
}
else if (this.type === 'radial') {
// svg radial gradient has just 1 radius. the biggest.
markup = [
'<radialGradient ',
commonAttributes,
' cx="', needsSwap ? coords.x1 : coords.x2,
'" cy="', needsSwap ? coords.y1 : coords.y2,
'" r="', needsSwap ? coords.r1 : coords.r2,
'" fx="', needsSwap ? coords.x2 : coords.x1,
'" fy="', needsSwap ? coords.y2 : coords.y1,
'">\n'
];
}
if (this.type === 'radial') {
if (needsSwap) {
// svg goes from internal to external radius. if radius are inverted, swap color stops.
colorStops = colorStops.concat();
colorStops.reverse();
for (i = 0, len = colorStops.length; i < len; i++) {
colorStops[i].offset = 1 - colorStops[i].offset;
}
}
var minRadius = Math.min(coords.r1, coords.r2);
if (minRadius > 0) {
// i have to shift all colorStops and add new one in 0.
var maxRadius = Math.max(coords.r1, coords.r2),
percentageShift = minRadius / maxRadius;
for (i = 0, len = colorStops.length; i < len; i++) {
colorStops[i].offset += percentageShift * (1 - colorStops[i].offset);
}
}
}
for (i = 0, len = colorStops.length; i < len; i++) {
var colorStop = colorStops[i];
markup.push(
'<stop ',
'offset="', (colorStop.offset * 100) + '%',
'" style="stop-color:', colorStop.color,
(typeof colorStop.opacity !== 'undefined' ? ';stop-opacity: ' + colorStop.opacity : ';'),
'"/>\n'
);
}
markup.push((this.type === 'linear' ? '</linearGradient>\n' : '</radialGradient>\n'));
return markup.join('');
},
/* _TO_SVG_END_ */
/**
* Returns an instance of CanvasGradient
* @param {CanvasRenderingContext2D} ctx Context to render on
* @return {CanvasGradient}
*/
toLive: function(ctx) {
var gradient, coords = fabric.util.object.clone(this.coords), i, len;
if (!this.type) {
return;
}
if (this.type === 'linear') {
gradient = ctx.createLinearGradient(
coords.x1, coords.y1, coords.x2, coords.y2);
}
else if (this.type === 'radial') {
gradient = ctx.createRadialGradient(
coords.x1, coords.y1, coords.r1, coords.x2, coords.y2, coords.r2);
}
for (i = 0, len = this.colorStops.length; i < len; i++) {
var color = this.colorStops[i].color,
opacity = this.colorStops[i].opacity,
offset = this.colorStops[i].offset;
if (typeof opacity !== 'undefined') {
color = new fabric.Color(color).setAlpha(opacity).toRgba();
}
gradient.addColorStop(offset, color);
}
return gradient;
}
});
fabric.util.object.extend(fabric.Gradient, {
/* _FROM_SVG_START_ */
/**
* Returns {@link fabric.Gradient} instance from an SVG element
* @static
* @memberOf fabric.Gradient
* @param {SVGGradientElement} el SVG gradient element
* @param {fabric.Object} instance
* @param {String} opacityAttr A fill-opacity or stroke-opacity attribute to multiply to each stop's opacity.
* @param {Object} svgOptions an object containing the size of the SVG in order to parse correctly graidents
* that uses gradientUnits as 'userSpaceOnUse' and percentages.
* @param {Object.number} viewBoxWidth width part of the viewBox attribute on svg
* @param {Object.number} viewBoxHeight height part of the viewBox attribute on svg
* @param {Object.number} width width part of the svg tag if viewBox is not specified
* @param {Object.number} height height part of the svg tag if viewBox is not specified
* @return {fabric.Gradient} Gradient instance
* @see http://www.w3.org/TR/SVG/pservers.html#LinearGradientElement
* @see http://www.w3.org/TR/SVG/pservers.html#RadialGradientElement
*/
fromElement: function(el, instance, opacityAttr, svgOptions) {
/**
* @example:
*
* <linearGradient id="linearGrad1">
* <stop offset="0%" stop-color="white"/>
* <stop offset="100%" stop-color="black"/>
* </linearGradient>
*
* OR
*
* <linearGradient id="linearGrad2">
* <stop offset="0" style="stop-color:rgb(255,255,255)"/>
* <stop offset="1" style="stop-color:rgb(0,0,0)"/>
* </linearGradient>
*
* OR
*
* <radialGradient id="radialGrad1">
* <stop offset="0%" stop-color="white" stop-opacity="1" />
* <stop offset="50%" stop-color="black" stop-opacity="0.5" />
* <stop offset="100%" stop-color="white" stop-opacity="1" />
* </radialGradient>
*
* OR
*
* <radialGradient id="radialGrad2">
* <stop offset="0" stop-color="rgb(255,255,255)" />
* <stop offset="0.5" stop-color="rgb(0,0,0)" />
* <stop offset="1" stop-color="rgb(255,255,255)" />
* </radialGradient>
*
*/
var multiplier = parseFloat(opacityAttr) / (/%$/.test(opacityAttr) ? 100 : 1);
multiplier = multiplier < 0 ? 0 : multiplier > 1 ? 1 : multiplier;
if (isNaN(multiplier)) {
multiplier = 1;
}
var colorStopEls = el.getElementsByTagName('stop'),
type,
gradientUnits = el.getAttribute('gradientUnits') === 'userSpaceOnUse' ?
'pixels' : 'percentage',
gradientTransform = el.getAttribute('gradientTransform') || '',
colorStops = [],
coords, i, offsetX = 0, offsetY = 0,
transformMatrix;
if (el.nodeName === 'linearGradient' || el.nodeName === 'LINEARGRADIENT') {
type = 'linear';
coords = getLinearCoords(el);
}
else {
type = 'radial';
coords = getRadialCoords(el);
}
for (i = colorStopEls.length; i--; ) {
colorStops.push(getColorStop(colorStopEls[i], multiplier));
}
transformMatrix = fabric.parseTransformAttribute(gradientTransform);
__convertPercentUnitsToValues(instance, coords, svgOptions, gradientUnits);
if (gradientUnits === 'pixels') {
offsetX = -instance.left;
offsetY = -instance.top;
}
var gradient = new fabric.Gradient({
id: el.getAttribute('id'),
type: type,
coords: coords,
colorStops: colorStops,
gradientUnits: gradientUnits,
gradientTransform: transformMatrix,
offsetX: offsetX,
offsetY: offsetY,
});
return gradient;
},
/* _FROM_SVG_END_ */
/**
* Returns {@link fabric.Gradient} instance from its object representation
* this function is uniquely used by Object.setGradient and is deprecated with it.
* @static
* @deprecated since 3.4.0
* @memberOf fabric.Gradient
* @param {Object} obj
* @param {Object} [options] Options object
*/
forObject: function(obj, options) {
options || (options = { });
__convertPercentUnitsToValues(obj, options.coords, options.gradientUnits, {
// those values are to avoid errors. this function is uniquely used by
viewBoxWidth: 100,
viewBoxHeight: 100,
});
return new fabric.Gradient(options);
}
});
/**
* @private
*/
function __convertPercentUnitsToValues(instance, options, svgOptions, gradientUnits) {
var propValue, finalValue;
Object.keys(options).forEach(function(prop) {
propValue = options[prop];
if (propValue === 'Infinity') {
finalValue = 1;
}
else if (propValue === '-Infinity') {
finalValue = 0;
}
else {
finalValue = parseFloat(options[prop], 10);
if (typeof propValue === 'string' && /^(\d+\.\d+)%|(\d+)%$/.test(propValue)) {
finalValue *= 0.01;
if (gradientUnits === 'pixels') {
// then we need to fix those percentages here in svg parsing
if (prop === 'x1' || prop === 'x2' || prop === 'r2') {
finalValue *= svgOptions.viewBoxWidth || svgOptions.width;
}
if (prop === 'y1' || prop === 'y2') {
finalValue *= svgOptions.viewBoxHeight || svgOptions.height;
}
}
}
}
options[prop] = finalValue;
});
}
})();
(function() {
'use strict';
var toFixed = fabric.util.toFixed;
/**
* Pattern class
* @class fabric.Pattern
* @see {@link http://fabricjs.com/patterns|Pattern demo}
* @see {@link http://fabricjs.com/dynamic-patterns|DynamicPattern demo}
* @see {@link fabric.Pattern#initialize} for constructor definition
*/
fabric.Pattern = fabric.util.createClass(/** @lends fabric.Pattern.prototype */ {
/**
* Repeat property of a pattern (one of repeat, repeat-x, repeat-y or no-repeat)
* @type String
* @default
*/
repeat: 'repeat',
/**
* Pattern horizontal offset from object's left/top corner
* @type Number
* @default
*/
offsetX: 0,
/**
* Pattern vertical offset from object's left/top corner
* @type Number
* @default
*/
offsetY: 0,
/**
* crossOrigin value (one of "", "anonymous", "use-credentials")
* @see https://developer.mozilla.org/en-US/docs/HTML/CORS_settings_attributes
* @type String
* @default
*/
crossOrigin: '',
/**
* transform matrix to change the pattern, imported from svgs.
* @type Array
* @default
*/
patternTransform: null,
/**
* Constructor
* @param {Object} [options] Options object
* @param {Function} [callback] function to invoke after callback init.
* @return {fabric.Pattern} thisArg
*/
initialize: function(options, callback) {
options || (options = { });
this.id = fabric.Object.__uid++;
this.setOptions(options);
if (!options.source || (options.source && typeof options.source !== 'string')) {
callback && callback(this);
return;
}
// function string
if (typeof fabric.util.getFunctionBody(options.source) !== 'undefined') {
this.source = new Function(fabric.util.getFunctionBody(options.source));
callback && callback(this);
}
else {
// img src string
var _this = this;
this.source = fabric.util.createImage();
fabric.util.loadImage(options.source, function(img) {
_this.source = img;
callback && callback(_this);
}, null, this.crossOrigin);
}
},
/**
* Returns object representation of a pattern
* @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output
* @return {Object} Object representation of a pattern instance
*/
toObject: function(propertiesToInclude) {
var NUM_FRACTION_DIGITS = fabric.Object.NUM_FRACTION_DIGITS,
source, object;
// callback
if (typeof this.source === 'function') {
source = String(this.source);
}
// <img> element
else if (typeof this.source.src === 'string') {
source = this.source.src;
}
// <canvas> element
else if (typeof this.source === 'object' && this.source.toDataURL) {
source = this.source.toDataURL();
}
object = {
type: 'pattern',
source: source,
repeat: this.repeat,
crossOrigin: this.crossOrigin,
offsetX: toFixed(this.offsetX, NUM_FRACTION_DIGITS),
offsetY: toFixed(this.offsetY, NUM_FRACTION_DIGITS),
patternTransform: this.patternTransform ? this.patternTransform.concat() : null
};
fabric.util.populateWithProperties(this, object, propertiesToInclude);
return object;
},
/* _TO_SVG_START_ */
/**
* Returns SVG representation of a pattern
* @param {fabric.Object} object
* @return {String} SVG representation of a pattern
*/
toSVG: function(object) {
var patternSource = typeof this.source === 'function' ? this.source() : this.source,
patternWidth = patternSource.width / object.width,
patternHeight = patternSource.height / object.height,
patternOffsetX = this.offsetX / object.width,
patternOffsetY = this.offsetY / object.height,
patternImgSrc = '';
if (this.repeat === 'repeat-x' || this.repeat === 'no-repeat') {
patternHeight = 1;
if (patternOffsetY) {
patternHeight += Math.abs(patternOffsetY);
}
}
if (this.repeat === 'repeat-y' || this.repeat === 'no-repeat') {
patternWidth = 1;
if (patternOffsetX) {
patternWidth += Math.abs(patternOffsetX);
}
}
if (patternSource.src) {
patternImgSrc = patternSource.src;
}
else if (patternSource.toDataURL) {
patternImgSrc = patternSource.toDataURL();
}
return '<pattern id="SVGID_' + this.id +
'" x="' + patternOffsetX +
'" y="' + patternOffsetY +
'" width="' + patternWidth +
'" height="' + patternHeight + '">\n' +
'<image x="0" y="0"' +
' width="' + patternSource.width +
'" height="' + patternSource.height +
'" xlink:href="' + patternImgSrc +
'"></image>\n' +
'</pattern>\n';
},
/* _TO_SVG_END_ */
setOptions: function(options) {
for (var prop in options) {
this[prop] = options[prop];
}
},
/**
* Returns an instance of CanvasPattern
* @param {CanvasRenderingContext2D} ctx Context to create pattern
* @return {CanvasPattern}
*/
toLive: function(ctx) {
var source = typeof this.source === 'function' ? this.source() : this.source;
// if the image failed to load, return, and allow rest to continue loading
if (!source) {
return '';
}
// if an image
if (typeof source.src !== 'undefined') {
if (!source.complete) {
return '';
}
if (source.naturalWidth === 0 || source.naturalHeight === 0) {
return '';
}
}
return ctx.createPattern(source, this.repeat);
}
});
})();
(function(global) {
'use strict';
var fabric = global.fabric || (global.fabric = { }),
toFixed = fabric.util.toFixed;
if (fabric.Shadow) {
fabric.warn('fabric.Shadow is already defined.');
return;
}
/**
* Shadow class
* @class fabric.Shadow
* @see {@link http://fabricjs.com/shadows|Shadow demo}
* @see {@link fabric.Shadow#initialize} for constructor definition
*/
fabric.Shadow = fabric.util.createClass(/** @lends fabric.Shadow.prototype */ {
/**
* Shadow color
* @type String
* @default
*/
color: 'rgb(0,0,0)',
/**
* Shadow blur
* @type Number
*/
blur: 0,
/**
* Shadow horizontal offset
* @type Number
* @default
*/
offsetX: 0,
/**
* Shadow vertical offset
* @type Number
* @default
*/
offsetY: 0,
/**
* Whether the shadow should affect stroke operations
* @type Boolean
* @default
*/
affectStroke: false,
/**
* Indicates whether toObject should include default values
* @type Boolean
* @default
*/
includeDefaultValues: true,
/**
* When `false`, the shadow will scale with the object.
* When `true`, the shadow's offsetX, offsetY, and blur will not be affected by the object's scale.
* default to false
* @type Boolean
* @default
*/
nonScaling: false,
/**
* Constructor
* @param {Object|String} [options] Options object with any of color, blur, offsetX, offsetY properties or string (e.g. "rgba(0,0,0,0.2) 2px 2px 10px")
* @return {fabric.Shadow} thisArg
*/
initialize: function(options) {
if (typeof options === 'string') {
options = this._parseShadow(options);
}
for (var prop in options) {
this[prop] = options[prop];
}
this.id = fabric.Object.__uid++;
},
/**
* @private
* @param {String} shadow Shadow value to parse
* @return {Object} Shadow object with color, offsetX, offsetY and blur
*/
_parseShadow: function(shadow) {
var shadowStr = shadow.trim(),
offsetsAndBlur = fabric.Shadow.reOffsetsAndBlur.exec(shadowStr) || [],
color = shadowStr.replace(fabric.Shadow.reOffsetsAndBlur, '') || 'rgb(0,0,0)';
return {
color: color.trim(),
offsetX: parseInt(offsetsAndBlur[1], 10) || 0,
offsetY: parseInt(offsetsAndBlur[2], 10) || 0,
blur: parseInt(offsetsAndBlur[3], 10) || 0
};
},
/**
* Returns a string representation of an instance
* @see http://www.w3.org/TR/css-text-decor-3/#text-shadow
* @return {String} Returns CSS3 text-shadow declaration
*/
toString: function() {
return [this.offsetX, this.offsetY, this.blur, this.color].join('px ');
},
/* _TO_SVG_START_ */
/**
* Returns SVG representation of a shadow
* @param {fabric.Object} object
* @return {String} SVG representation of a shadow
*/
toSVG: function(object) {
var fBoxX = 40, fBoxY = 40, NUM_FRACTION_DIGITS = fabric.Object.NUM_FRACTION_DIGITS,
offset = fabric.util.rotateVector(
{ x: this.offsetX, y: this.offsetY },
fabric.util.degreesToRadians(-object.angle)),
BLUR_BOX = 20, color = new fabric.Color(this.color);
if (object.width && object.height) {
//http://www.w3.org/TR/SVG/filters.html#FilterEffectsRegion
// we add some extra space to filter box to contain the blur ( 20 )
fBoxX = toFixed((Math.abs(offset.x) + this.blur) / object.width, NUM_FRACTION_DIGITS) * 100 + BLUR_BOX;
fBoxY = toFixed((Math.abs(offset.y) + this.blur) / object.height, NUM_FRACTION_DIGITS) * 100 + BLUR_BOX;
}
if (object.flipX) {
offset.x *= -1;
}
if (object.flipY) {
offset.y *= -1;
}
return (
'<filter id="SVGID_' + this.id + '" y="-' + fBoxY + '%" height="' + (100 + 2 * fBoxY) + '%" ' +
'x="-' + fBoxX + '%" width="' + (100 + 2 * fBoxX) + '%" ' + '>\n' +
'\t<feGaussianBlur in="SourceAlpha" stdDeviation="' +
toFixed(this.blur ? this.blur / 2 : 0, NUM_FRACTION_DIGITS) + '"></feGaussianBlur>\n' +
'\t<feOffset dx="' + toFixed(offset.x, NUM_FRACTION_DIGITS) +
'" dy="' + toFixed(offset.y, NUM_FRACTION_DIGITS) + '" result="oBlur" ></feOffset>\n' +
'\t<feFlood flood-color="' + color.toRgb() + '" flood-opacity="' + color.getAlpha() + '"/>\n' +
'\t<feComposite in2="oBlur" operator="in" />\n' +
'\t<feMerge>\n' +
'\t\t<feMergeNode></feMergeNode>\n' +
'\t\t<feMergeNode in="SourceGraphic"></feMergeNode>\n' +
'\t</feMerge>\n' +
'</filter>\n');
},
/* _TO_SVG_END_ */
/**
* Returns object representation of a shadow
* @return {Object} Object representation of a shadow instance
*/
toObject: function() {
if (this.includeDefaultValues) {
return {
color: this.color,
blur: this.blur,
offsetX: this.offsetX,
offsetY: this.offsetY,
affectStroke: this.affectStroke,
nonScaling: this.nonScaling
};
}
var obj = { }, proto = fabric.Shadow.prototype;
['color', 'blur', 'offsetX', 'offsetY', 'affectStroke', 'nonScaling'].forEach(function(prop) {
if (this[prop] !== proto[prop]) {
obj[prop] = this[prop];
}
}, this);
return obj;
}
});
/**
* Regex matching shadow offsetX, offsetY and blur (ex: "2px 2px 10px rgba(0,0,0,0.2)", "rgb(0,255,0) 2px 2px")
* @static
* @field
* @memberOf fabric.Shadow
*/
// eslint-disable-next-line max-len
fabric.Shadow.reOffsetsAndBlur = /(?:\s|^)(-?\d+(?:px)?(?:\s?|$))?(-?\d+(?:px)?(?:\s?|$))?(\d+(?:px)?)?(?:\s?|$)(?:$|\s)/;
})(typeof exports !== 'undefined' ? exports : this);
(function () {
'use strict';
if (fabric.StaticCanvas) {
fabric.warn('fabric.StaticCanvas is already defined.');
return;
}
// aliases for faster resolution
var extend = fabric.util.object.extend,
getElementOffset = fabric.util.getElementOffset,
removeFromArray = fabric.util.removeFromArray,
toFixed = fabric.util.toFixed,
transformPoint = fabric.util.transformPoint,
invertTransform = fabric.util.invertTransform,
getNodeCanvas = fabric.util.getNodeCanvas,
createCanvasElement = fabric.util.createCanvasElement,
CANVAS_INIT_ERROR = new Error('Could not initialize `canvas` element');
/**
* Static canvas class
* @class fabric.StaticCanvas
* @mixes fabric.Collection
* @mixes fabric.Observable
* @see {@link http://fabricjs.com/static_canvas|StaticCanvas demo}
* @see {@link fabric.StaticCanvas#initialize} for constructor definition
* @fires before:render
* @fires after:render
* @fires canvas:cleared
* @fires object:added
* @fires object:removed
*/
fabric.StaticCanvas = fabric.util.createClass(fabric.CommonMethods, /** @lends fabric.StaticCanvas.prototype */ {
/**
* Constructor
* @param {HTMLElement | String} el &lt;canvas> element to initialize instance on
* @param {Object} [options] Options object
* @return {Object} thisArg
*/
initialize: function(el, options) {
options || (options = { });
this.renderAndResetBound = this.renderAndReset.bind(this);
this.requestRenderAllBound = this.requestRenderAll.bind(this);
this._initStatic(el, options);
},
/**
* Background color of canvas instance.
* Should be set via {@link fabric.StaticCanvas#setBackgroundColor}.
* @type {(String|fabric.Pattern)}
* @default
*/
backgroundColor: '',
/**
* Background image of canvas instance.
* Should be set via {@link fabric.StaticCanvas#setBackgroundImage}.
* <b>Backwards incompatibility note:</b> The "backgroundImageOpacity"
* and "backgroundImageStretch" properties are deprecated since 1.3.9.
* Use {@link fabric.Image#opacity}, {@link fabric.Image#width} and {@link fabric.Image#height}.
* since 2.4.0 image caching is active, please when putting an image as background, add to the
* canvas property a reference to the canvas it is on. Otherwise the image cannot detect the zoom
* vale. As an alternative you can disable image objectCaching
* @type fabric.Image
* @default
*/
backgroundImage: null,
/**
* Overlay color of canvas instance.
* Should be set via {@link fabric.StaticCanvas#setOverlayColor}
* @since 1.3.9
* @type {(String|fabric.Pattern)}
* @default
*/
overlayColor: '',
/**
* Overlay image of canvas instance.
* Should be set via {@link fabric.StaticCanvas#setOverlayImage}.
* <b>Backwards incompatibility note:</b> The "overlayImageLeft"
* and "overlayImageTop" properties are deprecated since 1.3.9.
* Use {@link fabric.Image#left} and {@link fabric.Image#top}.
* since 2.4.0 image caching is active, please when putting an image as overlay, add to the
* canvas property a reference to the canvas it is on. Otherwise the image cannot detect the zoom
* vale. As an alternative you can disable image objectCaching
* @type fabric.Image
* @default
*/
overlayImage: null,
/**
* Indicates whether toObject/toDatalessObject should include default values
* if set to false, takes precedence over the object value.
* @type Boolean
* @default
*/
includeDefaultValues: true,
/**
* Indicates whether objects' state should be saved
* @type Boolean
* @default
*/
stateful: false,
/**
* Indicates whether {@link fabric.Collection.add}, {@link fabric.Collection.insertAt} and {@link fabric.Collection.remove},
* {@link fabric.StaticCanvas.moveTo}, {@link fabric.StaticCanvas.clear} and many more, should also re-render canvas.
* Disabling this option will not give a performance boost when adding/removing a lot of objects to/from canvas at once
* since the renders are quequed and executed one per frame.
* Disabling is suggested anyway and managing the renders of the app manually is not a big effort ( canvas.requestRenderAll() )
* Left default to true to do not break documentation and old app, fiddles.
* @type Boolean
* @default
*/
renderOnAddRemove: true,
/**
* Function that determines clipping of entire canvas area
* Being passed context as first argument.
* If you are using code minification, ctx argument can be minified/manglied you should use
* as a workaround `var ctx = arguments[0];` in the function;
* See clipping canvas area in {@link https://github.com/kangax/fabric.js/wiki/FAQ}
* @deprecated since 2.0.0
* @type Function
* @default
*/
clipTo: null,
/**
* Indicates whether object controls (borders/controls) are rendered above overlay image
* @type Boolean
* @default
*/
controlsAboveOverlay: false,
/**
* Indicates whether the browser can be scrolled when using a touchscreen and dragging on the canvas
* @type Boolean
* @default
*/
allowTouchScrolling: false,
/**
* Indicates whether this canvas will use image smoothing, this is on by default in browsers
* @type Boolean
* @default
*/
imageSmoothingEnabled: true,
/**
* The transformation (in the format of Canvas transform) which focuses the viewport
* @type Array
* @default
*/
viewportTransform: fabric.iMatrix.concat(),
/**
* if set to false background image is not affected by viewport transform
* @since 1.6.3
* @type Boolean
* @default
*/
backgroundVpt: true,
/**
* if set to false overlya image is not affected by viewport transform
* @since 1.6.3
* @type Boolean
* @default
*/
overlayVpt: true,
/**
* Callback; invoked right before object is about to be scaled/rotated
* @deprecated since 2.3.0
* Use before:transform event
*/
onBeforeScaleRotate: function () {
/* NOOP */
},
/**
* When true, canvas is scaled by devicePixelRatio for better rendering on retina screens
* @type Boolean
* @default
*/
enableRetinaScaling: true,
/**
* Describe canvas element extension over design
* properties are tl,tr,bl,br.
* if canvas is not zoomed/panned those points are the four corner of canvas
* if canvas is viewportTransformed you those points indicate the extension
* of canvas element in plain untrasformed coordinates
* The coordinates get updated with @method calcViewportBoundaries.
* @memberOf fabric.StaticCanvas.prototype
*/
vptCoords: { },
/**
* Based on vptCoords and object.aCoords, skip rendering of objects that
* are not included in current viewport.
* May greatly help in applications with crowded canvas and use of zoom/pan
* If One of the corner of the bounding box of the object is on the canvas
* the objects get rendered.
* @memberOf fabric.StaticCanvas.prototype
* @type Boolean
* @default
*/
skipOffscreen: true,
/**
* a fabricObject that, without stroke define a clipping area with their shape. filled in black
* the clipPath object gets used when the canvas has rendered, and the context is placed in the
* top left corner of the canvas.
* clipPath will clip away controls, if you do not want this to happen use controlsAboveOverlay = true
* @type fabric.Object
*/
clipPath: undefined,
/**
* @private
* @param {HTMLElement | String} el &lt;canvas> element to initialize instance on
* @param {Object} [options] Options object
*/
_initStatic: function(el, options) {
var cb = this.requestRenderAllBound;
this._objects = [];
this._createLowerCanvas(el);
this._initOptions(options);
this._setImageSmoothing();
// only initialize retina scaling once
if (!this.interactive) {
this._initRetinaScaling();
}
if (options.overlayImage) {
this.setOverlayImage(options.overlayImage, cb);
}
if (options.backgroundImage) {
this.setBackgroundImage(options.backgroundImage, cb);
}
if (options.backgroundColor) {
this.setBackgroundColor(options.backgroundColor, cb);
}
if (options.overlayColor) {
this.setOverlayColor(options.overlayColor, cb);
}
this.calcOffset();
},
/**
* @private
*/
_isRetinaScaling: function() {
return (fabric.devicePixelRatio !== 1 && this.enableRetinaScaling);
},
/**
* @private
* @return {Number} retinaScaling if applied, otherwise 1;
*/
getRetinaScaling: function() {
return this._isRetinaScaling() ? fabric.devicePixelRatio : 1;
},
/**
* @private
*/
_initRetinaScaling: function() {
if (!this._isRetinaScaling()) {
return;
}
this.lowerCanvasEl.setAttribute('width', this.width * fabric.devicePixelRatio);
this.lowerCanvasEl.setAttribute('height', this.height * fabric.devicePixelRatio);
this.contextContainer.scale(fabric.devicePixelRatio, fabric.devicePixelRatio);
},
/**
* Calculates canvas element offset relative to the document
* This method is also attached as "resize" event handler of window
* @return {fabric.Canvas} instance
* @chainable
*/
calcOffset: function () {
this._offset = getElementOffset(this.lowerCanvasEl);
return this;
},
/**
* Sets {@link fabric.StaticCanvas#overlayImage|overlay image} for this canvas
* @param {(fabric.Image|String)} image fabric.Image instance or URL of an image to set overlay to
* @param {Function} callback callback to invoke when image is loaded and set as an overlay
* @param {Object} [options] Optional options to set for the {@link fabric.Image|overlay image}.
* @return {fabric.Canvas} thisArg
* @chainable
* @see {@link http://jsfiddle.net/fabricjs/MnzHT/|jsFiddle demo}
* @example <caption>Normal overlayImage with left/top = 0</caption>
* canvas.setOverlayImage('http://fabricjs.com/assets/jail_cell_bars.png', canvas.renderAll.bind(canvas), {
* // Needed to position overlayImage at 0/0
* originX: 'left',
* originY: 'top'
* });
* @example <caption>overlayImage with different properties</caption>
* canvas.setOverlayImage('http://fabricjs.com/assets/jail_cell_bars.png', canvas.renderAll.bind(canvas), {
* opacity: 0.5,
* angle: 45,
* left: 400,
* top: 400,
* originX: 'left',
* originY: 'top'
* });
* @example <caption>Stretched overlayImage #1 - width/height correspond to canvas width/height</caption>
* fabric.Image.fromURL('http://fabricjs.com/assets/jail_cell_bars.png', function(img) {
* img.set({width: canvas.width, height: canvas.height, originX: 'left', originY: 'top'});
* canvas.setOverlayImage(img, canvas.renderAll.bind(canvas));
* });
* @example <caption>Stretched overlayImage #2 - width/height correspond to canvas width/height</caption>
* canvas.setOverlayImage('http://fabricjs.com/assets/jail_cell_bars.png', canvas.renderAll.bind(canvas), {
* width: canvas.width,
* height: canvas.height,
* // Needed to position overlayImage at 0/0
* originX: 'left',
* originY: 'top'
* });
* @example <caption>overlayImage loaded from cross-origin</caption>
* canvas.setOverlayImage('http://fabricjs.com/assets/jail_cell_bars.png', canvas.renderAll.bind(canvas), {
* opacity: 0.5,
* angle: 45,
* left: 400,
* top: 400,
* originX: 'left',
* originY: 'top',
* crossOrigin: 'anonymous'
* });
*/
setOverlayImage: function (image, callback, options) {
return this.__setBgOverlayImage('overlayImage', image, callback, options);
},
/**
* Sets {@link fabric.StaticCanvas#backgroundImage|background image} for this canvas
* @param {(fabric.Image|String)} image fabric.Image instance or URL of an image to set background to
* @param {Function} callback Callback to invoke when image is loaded and set as background
* @param {Object} [options] Optional options to set for the {@link fabric.Image|background image}.
* @return {fabric.Canvas} thisArg
* @chainable
* @see {@link http://jsfiddle.net/djnr8o7a/28/|jsFiddle demo}
* @example <caption>Normal backgroundImage with left/top = 0</caption>
* canvas.setBackgroundImage('http://fabricjs.com/assets/honey_im_subtle.png', canvas.renderAll.bind(canvas), {
* // Needed to position backgroundImage at 0/0
* originX: 'left',
* originY: 'top'
* });
* @example <caption>backgroundImage with different properties</caption>
* canvas.setBackgroundImage('http://fabricjs.com/assets/honey_im_subtle.png', canvas.renderAll.bind(canvas), {
* opacity: 0.5,
* angle: 45,
* left: 400,
* top: 400,
* originX: 'left',
* originY: 'top'
* });
* @example <caption>Stretched backgroundImage #1 - width/height correspond to canvas width/height</caption>
* fabric.Image.fromURL('http://fabricjs.com/assets/honey_im_subtle.png', function(img) {
* img.set({width: canvas.width, height: canvas.height, originX: 'left', originY: 'top'});
* canvas.setBackgroundImage(img, canvas.renderAll.bind(canvas));
* });
* @example <caption>Stretched backgroundImage #2 - width/height correspond to canvas width/height</caption>
* canvas.setBackgroundImage('http://fabricjs.com/assets/honey_im_subtle.png', canvas.renderAll.bind(canvas), {
* width: canvas.width,
* height: canvas.height,
* // Needed to position backgroundImage at 0/0
* originX: 'left',
* originY: 'top'
* });
* @example <caption>backgroundImage loaded from cross-origin</caption>
* canvas.setBackgroundImage('http://fabricjs.com/assets/honey_im_subtle.png', canvas.renderAll.bind(canvas), {
* opacity: 0.5,
* angle: 45,
* left: 400,
* top: 400,
* originX: 'left',
* originY: 'top',
* crossOrigin: 'anonymous'
* });
*/
// TODO: fix stretched examples
setBackgroundImage: function (image, callback, options) {
return this.__setBgOverlayImage('backgroundImage', image, callback, options);
},
/**
* Sets {@link fabric.StaticCanvas#overlayColor|foreground color} for this canvas
* @param {(String|fabric.Pattern)} overlayColor Color or pattern to set foreground color to
* @param {Function} callback Callback to invoke when foreground color is set
* @return {fabric.Canvas} thisArg
* @chainable
* @see {@link http://jsfiddle.net/fabricjs/pB55h/|jsFiddle demo}
* @example <caption>Normal overlayColor - color value</caption>
* canvas.setOverlayColor('rgba(255, 73, 64, 0.6)', canvas.renderAll.bind(canvas));
* @example <caption>fabric.Pattern used as overlayColor</caption>
* canvas.setOverlayColor({
* source: 'http://fabricjs.com/assets/escheresque_ste.png'
* }, canvas.renderAll.bind(canvas));
* @example <caption>fabric.Pattern used as overlayColor with repeat and offset</caption>
* canvas.setOverlayColor({
* source: 'http://fabricjs.com/assets/escheresque_ste.png',
* repeat: 'repeat',
* offsetX: 200,
* offsetY: 100
* }, canvas.renderAll.bind(canvas));
*/
setOverlayColor: function(overlayColor, callback) {
return this.__setBgOverlayColor('overlayColor', overlayColor, callback);
},
/**
* Sets {@link fabric.StaticCanvas#backgroundColor|background color} for this canvas
* @param {(String|fabric.Pattern)} backgroundColor Color or pattern to set background color to
* @param {Function} callback Callback to invoke when background color is set
* @return {fabric.Canvas} thisArg
* @chainable
* @see {@link http://jsfiddle.net/fabricjs/hXzvk/|jsFiddle demo}
* @example <caption>Normal backgroundColor - color value</caption>
* canvas.setBackgroundColor('rgba(255, 73, 64, 0.6)', canvas.renderAll.bind(canvas));
* @example <caption>fabric.Pattern used as backgroundColor</caption>
* canvas.setBackgroundColor({
* source: 'http://fabricjs.com/assets/escheresque_ste.png'
* }, canvas.renderAll.bind(canvas));
* @example <caption>fabric.Pattern used as backgroundColor with repeat and offset</caption>
* canvas.setBackgroundColor({
* source: 'http://fabricjs.com/assets/escheresque_ste.png',
* repeat: 'repeat',
* offsetX: 200,
* offsetY: 100
* }, canvas.renderAll.bind(canvas));
*/
setBackgroundColor: function(backgroundColor, callback) {
return this.__setBgOverlayColor('backgroundColor', backgroundColor, callback);
},
/**
* @private
* @see {@link http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-imagesmoothingenabled|WhatWG Canvas Standard}
*/
_setImageSmoothing: function() {
var ctx = this.getContext();
ctx.imageSmoothingEnabled = ctx.imageSmoothingEnabled || ctx.webkitImageSmoothingEnabled
|| ctx.mozImageSmoothingEnabled || ctx.msImageSmoothingEnabled || ctx.oImageSmoothingEnabled;
ctx.imageSmoothingEnabled = this.imageSmoothingEnabled;
},
/**
* @private
* @param {String} property Property to set ({@link fabric.StaticCanvas#backgroundImage|backgroundImage}
* or {@link fabric.StaticCanvas#overlayImage|overlayImage})
* @param {(fabric.Image|String|null)} image fabric.Image instance, URL of an image or null to set background or overlay to
* @param {Function} callback Callback to invoke when image is loaded and set as background or overlay
* @param {Object} [options] Optional options to set for the {@link fabric.Image|image}.
*/
__setBgOverlayImage: function(property, image, callback, options) {
if (typeof image === 'string') {
fabric.util.loadImage(image, function(img) {
if (img) {
var instance = new fabric.Image(img, options);
this[property] = instance;
instance.canvas = this;
}
callback && callback(img);
}, this, options && options.crossOrigin);
}
else {
options && image.setOptions(options);
this[property] = image;
image && (image.canvas = this);
callback && callback(image);
}
return this;
},
/**
* @private
* @param {String} property Property to set ({@link fabric.StaticCanvas#backgroundColor|backgroundColor}
* or {@link fabric.StaticCanvas#overlayColor|overlayColor})
* @param {(Object|String|null)} color Object with pattern information, color value or null
* @param {Function} [callback] Callback is invoked when color is set
*/
__setBgOverlayColor: function(property, color, callback) {
this[property] = color;
this._initGradient(color, property);
this._initPattern(color, property, callback);
return this;
},
/**
* @private
*/
_createCanvasElement: function() {
var element = createCanvasElement();
if (!element) {
throw CANVAS_INIT_ERROR;
}
if (!element.style) {
element.style = { };
}
if (typeof element.getContext === 'undefined') {
throw CANVAS_INIT_ERROR;
}
return element;
},
/**
* @private
* @param {Object} [options] Options object
*/
_initOptions: function (options) {
var lowerCanvasEl = this.lowerCanvasEl;
this._setOptions(options);
this.width = this.width || parseInt(lowerCanvasEl.width, 10) || 0;
this.height = this.height || parseInt(lowerCanvasEl.height, 10) || 0;
if (!this.lowerCanvasEl.style) {
return;
}
lowerCanvasEl.width = this.width;
lowerCanvasEl.height = this.height;
lowerCanvasEl.style.width = this.width + 'px';
lowerCanvasEl.style.height = this.height + 'px';
this.viewportTransform = this.viewportTransform.slice();
},
/**
* Creates a bottom canvas
* @private
* @param {HTMLElement} [canvasEl]
*/
_createLowerCanvas: function (canvasEl) {
// canvasEl === 'HTMLCanvasElement' does not work on jsdom/node
if (canvasEl && canvasEl.getContext) {
this.lowerCanvasEl = canvasEl;
}
else {
this.lowerCanvasEl = fabric.util.getById(canvasEl) || this._createCanvasElement();
}
fabric.util.addClass(this.lowerCanvasEl, 'lower-canvas');
if (this.interactive) {
this._applyCanvasStyle(this.lowerCanvasEl);
}
this.contextContainer = this.lowerCanvasEl.getContext('2d');
},
/**
* Returns canvas width (in px)
* @return {Number}
*/
getWidth: function () {
return this.width;
},
/**
* Returns canvas height (in px)
* @return {Number}
*/
getHeight: function () {
return this.height;
},
/**
* Sets width of this canvas instance
* @param {Number|String} value Value to set width to
* @param {Object} [options] Options object
* @param {Boolean} [options.backstoreOnly=false] Set the given dimensions only as canvas backstore dimensions
* @param {Boolean} [options.cssOnly=false] Set the given dimensions only as css dimensions
* @return {fabric.Canvas} instance
* @chainable true
*/
setWidth: function (value, options) {
return this.setDimensions({ width: value }, options);
},
/**
* Sets height of this canvas instance
* @param {Number|String} value Value to set height to
* @param {Object} [options] Options object
* @param {Boolean} [options.backstoreOnly=false] Set the given dimensions only as canvas backstore dimensions
* @param {Boolean} [options.cssOnly=false] Set the given dimensions only as css dimensions
* @return {fabric.Canvas} instance
* @chainable true
*/
setHeight: function (value, options) {
return this.setDimensions({ height: value }, options);
},
/**
* Sets dimensions (width, height) of this canvas instance. when options.cssOnly flag active you should also supply the unit of measure (px/%/em)
* @param {Object} dimensions Object with width/height properties
* @param {Number|String} [dimensions.width] Width of canvas element
* @param {Number|String} [dimensions.height] Height of canvas element
* @param {Object} [options] Options object
* @param {Boolean} [options.backstoreOnly=false] Set the given dimensions only as canvas backstore dimensions
* @param {Boolean} [options.cssOnly=false] Set the given dimensions only as css dimensions
* @return {fabric.Canvas} thisArg
* @chainable
*/
setDimensions: function (dimensions, options) {
var cssValue;
options = options || {};
for (var prop in dimensions) {
cssValue = dimensions[prop];
if (!options.cssOnly) {
this._setBackstoreDimension(prop, dimensions[prop]);
cssValue += 'px';
this.hasLostContext = true;
}
if (!options.backstoreOnly) {
this._setCssDimension(prop, cssValue);
}
}
if (this._isCurrentlyDrawing) {
this.freeDrawingBrush && this.freeDrawingBrush._setBrushStyles();
}
this._initRetinaScaling();
this._setImageSmoothing();
this.calcOffset();
if (!options.cssOnly) {
this.requestRenderAll();
}
return this;
},
/**
* Helper for setting width/height
* @private
* @param {String} prop property (width|height)
* @param {Number} value value to set property to
* @return {fabric.Canvas} instance
* @chainable true
*/
_setBackstoreDimension: function (prop, value) {
this.lowerCanvasEl[prop] = value;
if (this.upperCanvasEl) {
this.upperCanvasEl[prop] = value;
}
if (this.cacheCanvasEl) {
this.cacheCanvasEl[prop] = value;
}
this[prop] = value;
return this;
},
/**
* Helper for setting css width/height
* @private
* @param {String} prop property (width|height)
* @param {String} value value to set property to
* @return {fabric.Canvas} instance
* @chainable true
*/
_setCssDimension: function (prop, value) {
this.lowerCanvasEl.style[prop] = value;
if (this.upperCanvasEl) {
this.upperCanvasEl.style[prop] = value;
}
if (this.wrapperEl) {
this.wrapperEl.style[prop] = value;
}
return this;
},
/**
* Returns canvas zoom level
* @return {Number}
*/
getZoom: function () {
return this.viewportTransform[0];
},
/**
* Sets viewport transform of this canvas instance
* @param {Array} vpt the transform in the form of context.transform
* @return {fabric.Canvas} instance
* @chainable true
*/
setViewportTransform: function (vpt) {
var activeObject = this._activeObject, object, ignoreVpt = false, skipAbsolute = true, i, len;
this.viewportTransform = vpt;
for (i = 0, len = this._objects.length; i < len; i++) {
object = this._objects[i];
object.group || object.setCoords(ignoreVpt, skipAbsolute);
}
if (activeObject && activeObject.type === 'activeSelection') {
activeObject.setCoords(ignoreVpt, skipAbsolute);
}
this.calcViewportBoundaries();
this.renderOnAddRemove && this.requestRenderAll();
return this;
},
/**
* Sets zoom level of this canvas instance, zoom centered around point
* @param {fabric.Point} point to zoom with respect to
* @param {Number} value to set zoom to, less than 1 zooms out
* @return {fabric.Canvas} instance
* @chainable true
*/
zoomToPoint: function (point, value) {
// TODO: just change the scale, preserve other transformations
var before = point, vpt = this.viewportTransform.slice(0);
point = transformPoint(point, invertTransform(this.viewportTransform));
vpt[0] = value;
vpt[3] = value;
var after = transformPoint(point, vpt);
vpt[4] += before.x - after.x;
vpt[5] += before.y - after.y;
return this.setViewportTransform(vpt);
},
/**
* Sets zoom level of this canvas instance
* @param {Number} value to set zoom to, less than 1 zooms out
* @return {fabric.Canvas} instance
* @chainable true
*/
setZoom: function (value) {
this.zoomToPoint(new fabric.Point(0, 0), value);
return this;
},
/**
* Pan viewport so as to place point at top left corner of canvas
* @param {fabric.Point} point to move to
* @return {fabric.Canvas} instance
* @chainable true
*/
absolutePan: function (point) {
var vpt = this.viewportTransform.slice(0);
vpt[4] = -point.x;
vpt[5] = -point.y;
return this.setViewportTransform(vpt);
},
/**
* Pans viewpoint relatively
* @param {fabric.Point} point (position vector) to move by
* @return {fabric.Canvas} instance
* @chainable true
*/
relativePan: function (point) {
return this.absolutePan(new fabric.Point(
-point.x - this.viewportTransform[4],
-point.y - this.viewportTransform[5]
));
},
/**
* Returns &lt;canvas> element corresponding to this instance
* @return {HTMLCanvasElement}
*/
getElement: function () {
return this.lowerCanvasEl;
},
/**
* @private
* @param {fabric.Object} obj Object that was added
*/
_onObjectAdded: function(obj) {
this.stateful && obj.setupState();
obj._set('canvas', this);
obj.setCoords();
this.fire('object:added', { target: obj });
obj.fire('added');
},
/**
* @private
* @param {fabric.Object} obj Object that was removed
*/
_onObjectRemoved: function(obj) {
this.fire('object:removed', { target: obj });
obj.fire('removed');
delete obj.canvas;
},
/**
* Clears specified context of canvas element
* @param {CanvasRenderingContext2D} ctx Context to clear
* @return {fabric.Canvas} thisArg
* @chainable
*/
clearContext: function(ctx) {
ctx.clearRect(0, 0, this.width, this.height);
return this;
},
/**
* Returns context of canvas where objects are drawn
* @return {CanvasRenderingContext2D}
*/
getContext: function () {
return this.contextContainer;
},
/**
* Clears all contexts (background, main, top) of an instance
* @return {fabric.Canvas} thisArg
* @chainable
*/
clear: function () {
this._objects.length = 0;
this.backgroundImage = null;
this.overlayImage = null;
this.backgroundColor = '';
this.overlayColor = '';
if (this._hasITextHandlers) {
this.off('mouse:up', this._mouseUpITextHandler);
this._iTextInstances = null;
this._hasITextHandlers = false;
}
this.clearContext(this.contextContainer);
this.fire('canvas:cleared');
this.renderOnAddRemove && this.requestRenderAll();
return this;
},
/**
* Renders the canvas
* @return {fabric.Canvas} instance
* @chainable
*/
renderAll: function () {
var canvasToDrawOn = this.contextContainer;
this.renderCanvas(canvasToDrawOn, this._objects);
return this;
},
/**
* Function created to be instance bound at initialization
* used in requestAnimationFrame rendering
* Let the fabricJS call it. If you call it manually you could have more
* animationFrame stacking on to of each other
* for an imperative rendering, use canvas.renderAll
* @private
* @return {fabric.Canvas} instance
* @chainable
*/
renderAndReset: function() {
this.isRendering = 0;
this.renderAll();
},
/**
* Append a renderAll request to next animation frame.
* unless one is already in progress, in that case nothing is done
* a boolean flag will avoid appending more.
* @return {fabric.Canvas} instance
* @chainable
*/
requestRenderAll: function () {
if (!this.isRendering) {
this.isRendering = fabric.util.requestAnimFrame(this.renderAndResetBound);
}
return this;
},
/**
* Calculate the position of the 4 corner of canvas with current viewportTransform.
* helps to determinate when an object is in the current rendering viewport using
* object absolute coordinates ( aCoords )
* @return {Object} points.tl
* @chainable
*/
calcViewportBoundaries: function() {
var points = { }, width = this.width, height = this.height,
iVpt = invertTransform(this.viewportTransform);
points.tl = transformPoint({ x: 0, y: 0 }, iVpt);
points.br = transformPoint({ x: width, y: height }, iVpt);
points.tr = new fabric.Point(points.br.x, points.tl.y);
points.bl = new fabric.Point(points.tl.x, points.br.y);
this.vptCoords = points;
return points;
},
cancelRequestedRender: function() {
if (this.isRendering) {
fabric.util.cancelAnimFrame(this.isRendering);
this.isRendering = 0;
}
},
/**
* Renders background, objects, overlay and controls.
* @param {CanvasRenderingContext2D} ctx
* @param {Array} objects to render
* @return {fabric.Canvas} instance
* @chainable
*/
renderCanvas: function(ctx, objects) {
var v = this.viewportTransform, path = this.clipPath;
this.cancelRequestedRender();
this.calcViewportBoundaries();
this.clearContext(ctx);
this.fire('before:render', { ctx: ctx, });
if (this.clipTo) {
fabric.util.clipContext(this, ctx);
}
this._renderBackground(ctx);
ctx.save();
//apply viewport transform once for all rendering process
ctx.transform(v[0], v[1], v[2], v[3], v[4], v[5]);
this._renderObjects(ctx, objects);
ctx.restore();
if (!this.controlsAboveOverlay && this.interactive) {
this.drawControls(ctx);
}
if (this.clipTo) {
ctx.restore();
}
if (path) {
path.canvas = this;
// needed to setup a couple of variables
path.shouldCache();
path._transformDone = true;
path.renderCache({ forClipping: true });
this.drawClipPathOnCanvas(ctx);
}
this._renderOverlay(ctx);
if (this.controlsAboveOverlay && this.interactive) {
this.drawControls(ctx);
}
this.fire('after:render', { ctx: ctx, });
},
/**
* Paint the cached clipPath on the lowerCanvasEl
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
drawClipPathOnCanvas: function(ctx) {
var v = this.viewportTransform, path = this.clipPath;
ctx.save();
ctx.transform(v[0], v[1], v[2], v[3], v[4], v[5]);
// DEBUG: uncomment this line, comment the following
// ctx.globalAlpha = 0.4;
ctx.globalCompositeOperation = 'destination-in';
path.transform(ctx);
ctx.scale(1 / path.zoomX, 1 / path.zoomY);
ctx.drawImage(path._cacheCanvas, -path.cacheTranslationX, -path.cacheTranslationY);
ctx.restore();
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
* @param {Array} objects to render
*/
_renderObjects: function(ctx, objects) {
var i, len;
for (i = 0, len = objects.length; i < len; ++i) {
objects[i] && objects[i].render(ctx);
}
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
* @param {string} property 'background' or 'overlay'
*/
_renderBackgroundOrOverlay: function(ctx, property) {
var fill = this[property + 'Color'], object = this[property + 'Image'],
v = this.viewportTransform, needsVpt = this[property + 'Vpt'];
if (!fill && !object) {
return;
}
if (fill) {
ctx.save();
ctx.beginPath();
ctx.moveTo(0, 0);
ctx.lineTo(this.width, 0);
ctx.lineTo(this.width, this.height);
ctx.lineTo(0, this.height);
ctx.closePath();
ctx.fillStyle = fill.toLive
? fill.toLive(ctx, this)
: fill;
if (needsVpt) {
ctx.transform(
v[0], v[1], v[2], v[3],
v[4] + (fill.offsetX || 0),
v[5] + (fill.offsetY || 0)
);
}
var m = fill.gradientTransform || fill.patternTransform;
m && ctx.transform(m[0], m[1], m[2], m[3], m[4], m[5]);
ctx.fill();
ctx.restore();
}
if (object) {
ctx.save();
if (needsVpt) {
ctx.transform(v[0], v[1], v[2], v[3], v[4], v[5]);
}
object.render(ctx);
ctx.restore();
}
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_renderBackground: function(ctx) {
this._renderBackgroundOrOverlay(ctx, 'background');
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_renderOverlay: function(ctx) {
this._renderBackgroundOrOverlay(ctx, 'overlay');
},
/**
* Returns coordinates of a center of canvas.
* Returned value is an object with top and left properties
* @return {Object} object with "top" and "left" number values
*/
getCenter: function () {
return {
top: this.height / 2,
left: this.width / 2
};
},
/**
* Centers object horizontally in the canvas
* @param {fabric.Object} object Object to center horizontally
* @return {fabric.Canvas} thisArg
*/
centerObjectH: function (object) {
return this._centerObject(object, new fabric.Point(this.getCenter().left, object.getCenterPoint().y));
},
/**
* Centers object vertically in the canvas
* @param {fabric.Object} object Object to center vertically
* @return {fabric.Canvas} thisArg
* @chainable
*/
centerObjectV: function (object) {
return this._centerObject(object, new fabric.Point(object.getCenterPoint().x, this.getCenter().top));
},
/**
* Centers object vertically and horizontally in the canvas
* @param {fabric.Object} object Object to center vertically and horizontally
* @return {fabric.Canvas} thisArg
* @chainable
*/
centerObject: function(object) {
var center = this.getCenter();
return this._centerObject(object, new fabric.Point(center.left, center.top));
},
/**
* Centers object vertically and horizontally in the viewport
* @param {fabric.Object} object Object to center vertically and horizontally
* @return {fabric.Canvas} thisArg
* @chainable
*/
viewportCenterObject: function(object) {
var vpCenter = this.getVpCenter();
return this._centerObject(object, vpCenter);
},
/**
* Centers object horizontally in the viewport, object.top is unchanged
* @param {fabric.Object} object Object to center vertically and horizontally
* @return {fabric.Canvas} thisArg
* @chainable
*/
viewportCenterObjectH: function(object) {
var vpCenter = this.getVpCenter();
this._centerObject(object, new fabric.Point(vpCenter.x, object.getCenterPoint().y));
return this;
},
/**
* Centers object Vertically in the viewport, object.top is unchanged
* @param {fabric.Object} object Object to center vertically and horizontally
* @return {fabric.Canvas} thisArg
* @chainable
*/
viewportCenterObjectV: function(object) {
var vpCenter = this.getVpCenter();
return this._centerObject(object, new fabric.Point(object.getCenterPoint().x, vpCenter.y));
},
/**
* Calculate the point in canvas that correspond to the center of actual viewport.
* @return {fabric.Point} vpCenter, viewport center
* @chainable
*/
getVpCenter: function() {
var center = this.getCenter(),
iVpt = invertTransform(this.viewportTransform);
return transformPoint({ x: center.left, y: center.top }, iVpt);
},
/**
* @private
* @param {fabric.Object} object Object to center
* @param {fabric.Point} center Center point
* @return {fabric.Canvas} thisArg
* @chainable
*/
_centerObject: function(object, center) {
object.setPositionByOrigin(center, 'center', 'center');
object.setCoords();
this.renderOnAddRemove && this.requestRenderAll();
return this;
},
/**
* Returs dataless JSON representation of canvas
* @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output
* @return {String} json string
*/
toDatalessJSON: function (propertiesToInclude) {
return this.toDatalessObject(propertiesToInclude);
},
/**
* Returns object representation of canvas
* @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output
* @return {Object} object representation of an instance
*/
toObject: function (propertiesToInclude) {
return this._toObjectMethod('toObject', propertiesToInclude);
},
/**
* Returns dataless object representation of canvas
* @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output
* @return {Object} object representation of an instance
*/
toDatalessObject: function (propertiesToInclude) {
return this._toObjectMethod('toDatalessObject', propertiesToInclude);
},
/**
* @private
*/
_toObjectMethod: function (methodName, propertiesToInclude) {
var clipPath = this.clipPath, data = {
version: fabric.version,
objects: this._toObjects(methodName, propertiesToInclude),
};
if (clipPath) {
data.clipPath = this._toObject(this.clipPath, methodName, propertiesToInclude);
}
extend(data, this.__serializeBgOverlay(methodName, propertiesToInclude));
fabric.util.populateWithProperties(this, data, propertiesToInclude);
return data;
},
/**
* @private
*/
_toObjects: function(methodName, propertiesToInclude) {
return this._objects.filter(function(object) {
return !object.excludeFromExport;
}).map(function(instance) {
return this._toObject(instance, methodName, propertiesToInclude);
}, this);
},
/**
* @private
*/
_toObject: function(instance, methodName, propertiesToInclude) {
var originalValue;
if (!this.includeDefaultValues) {
originalValue = instance.includeDefaultValues;
instance.includeDefaultValues = false;
}
var object = instance[methodName](propertiesToInclude);
if (!this.includeDefaultValues) {
instance.includeDefaultValues = originalValue;
}
return object;
},
/**
* @private
*/
__serializeBgOverlay: function(methodName, propertiesToInclude) {
var data = { }, bgImage = this.backgroundImage, overlay = this.overlayImage;
if (this.backgroundColor) {
data.background = this.backgroundColor.toObject
? this.backgroundColor.toObject(propertiesToInclude)
: this.backgroundColor;
}
if (this.overlayColor) {
data.overlay = this.overlayColor.toObject
? this.overlayColor.toObject(propertiesToInclude)
: this.overlayColor;
}
if (bgImage && !bgImage.excludeFromExport) {
data.backgroundImage = this._toObject(bgImage, methodName, propertiesToInclude);
}
if (overlay && !overlay.excludeFromExport) {
data.overlayImage = this._toObject(overlay, methodName, propertiesToInclude);
}
return data;
},
/* _TO_SVG_START_ */
/**
* When true, getSvgTransform() will apply the StaticCanvas.viewportTransform to the SVG transformation. When true,
* a zoomed canvas will then produce zoomed SVG output.
* @type Boolean
* @default
*/
svgViewportTransformation: true,
/**
* Returns SVG representation of canvas
* @function
* @param {Object} [options] Options object for SVG output
* @param {Boolean} [options.suppressPreamble=false] If true xml tag is not included
* @param {Object} [options.viewBox] SVG viewbox object
* @param {Number} [options.viewBox.x] x-cooridnate of viewbox
* @param {Number} [options.viewBox.y] y-coordinate of viewbox
* @param {Number} [options.viewBox.width] Width of viewbox
* @param {Number} [options.viewBox.height] Height of viewbox
* @param {String} [options.encoding=UTF-8] Encoding of SVG output
* @param {String} [options.width] desired width of svg with or without units
* @param {String} [options.height] desired height of svg with or without units
* @param {Function} [reviver] Method for further parsing of svg elements, called after each fabric object converted into svg representation.
* @return {String} SVG string
* @tutorial {@link http://fabricjs.com/fabric-intro-part-3#serialization}
* @see {@link http://jsfiddle.net/fabricjs/jQ3ZZ/|jsFiddle demo}
* @example <caption>Normal SVG output</caption>
* var svg = canvas.toSVG();
* @example <caption>SVG output without preamble (without &lt;?xml ../>)</caption>
* var svg = canvas.toSVG({suppressPreamble: true});
* @example <caption>SVG output with viewBox attribute</caption>
* var svg = canvas.toSVG({
* viewBox: {
* x: 100,
* y: 100,
* width: 200,
* height: 300
* }
* });
* @example <caption>SVG output with different encoding (default: UTF-8)</caption>
* var svg = canvas.toSVG({encoding: 'ISO-8859-1'});
* @example <caption>Modify SVG output with reviver function</caption>
* var svg = canvas.toSVG(null, function(svg) {
* return svg.replace('stroke-dasharray: ; stroke-linecap: butt; stroke-linejoin: miter; stroke-miterlimit: 10; ', '');
* });
*/
toSVG: function(options, reviver) {
options || (options = { });
options.reviver = reviver;
var markup = [];
this._setSVGPreamble(markup, options);
this._setSVGHeader(markup, options);
if (this.clipPath) {
markup.push('<g clip-path="url(#' + this.clipPath.clipPathId + ')" >\n');
}
this._setSVGBgOverlayColor(markup, 'background');
this._setSVGBgOverlayImage(markup, 'backgroundImage', reviver);
this._setSVGObjects(markup, reviver);
if (this.clipPath) {
markup.push('</g>\n');
}
this._setSVGBgOverlayColor(markup, 'overlay');
this._setSVGBgOverlayImage(markup, 'overlayImage', reviver);
markup.push('</svg>');
return markup.join('');
},
/**
* @private
*/
_setSVGPreamble: function(markup, options) {
if (options.suppressPreamble) {
return;
}
markup.push(
'<?xml version="1.0" encoding="', (options.encoding || 'UTF-8'), '" standalone="no" ?>\n',
'<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" ',
'"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">\n'
);
},
/**
* @private
*/
_setSVGHeader: function(markup, options) {
var width = options.width || this.width,
height = options.height || this.height,
vpt, viewBox = 'viewBox="0 0 ' + this.width + ' ' + this.height + '" ',
NUM_FRACTION_DIGITS = fabric.Object.NUM_FRACTION_DIGITS;
if (options.viewBox) {
viewBox = 'viewBox="' +
options.viewBox.x + ' ' +
options.viewBox.y + ' ' +
options.viewBox.width + ' ' +
options.viewBox.height + '" ';
}
else {
if (this.svgViewportTransformation) {
vpt = this.viewportTransform;
viewBox = 'viewBox="' +
toFixed(-vpt[4] / vpt[0], NUM_FRACTION_DIGITS) + ' ' +
toFixed(-vpt[5] / vpt[3], NUM_FRACTION_DIGITS) + ' ' +
toFixed(this.width / vpt[0], NUM_FRACTION_DIGITS) + ' ' +
toFixed(this.height / vpt[3], NUM_FRACTION_DIGITS) + '" ';
}
}
markup.push(
'<svg ',
'xmlns="http://www.w3.org/2000/svg" ',
'xmlns:xlink="http://www.w3.org/1999/xlink" ',
'version="1.1" ',
'width="', width, '" ',
'height="', height, '" ',
viewBox,
'xml:space="preserve">\n',
'<desc>Created with Fabric.js ', fabric.version, '</desc>\n',
'<defs>\n',
this.createSVGFontFacesMarkup(),
this.createSVGRefElementsMarkup(),
this.createSVGClipPathMarkup(options),
'</defs>\n'
);
},
createSVGClipPathMarkup: function(options) {
var clipPath = this.clipPath;
if (clipPath) {
clipPath.clipPathId = 'CLIPPATH_' + fabric.Object.__uid++;
return '<clipPath id="' + clipPath.clipPathId + '" >\n' +
this.clipPath.toClipPathSVG(options.reviver) +
'</clipPath>\n';
}
return '';
},
/**
* Creates markup containing SVG referenced elements like patterns, gradients etc.
* @return {String}
*/
createSVGRefElementsMarkup: function() {
var _this = this,
markup = ['background', 'overlay'].map(function(prop) {
var fill = _this[prop + 'Color'];
if (fill && fill.toLive) {
var shouldTransform = _this[prop + 'Vpt'], vpt = _this.viewportTransform,
object = {
width: _this.width / (shouldTransform ? vpt[0] : 1),
height: _this.height / (shouldTransform ? vpt[3] : 1)
};
return fill.toSVG(
object,
{ additionalTransform: shouldTransform ? fabric.util.matrixToSVG(vpt) : '' }
);
}
});
return markup.join('');
},
/**
* Creates markup containing SVG font faces,
* font URLs for font faces must be collected by developers
* and are not extracted from the DOM by fabricjs
* @param {Array} objects Array of fabric objects
* @return {String}
*/
createSVGFontFacesMarkup: function() {
var markup = '', fontList = { }, obj, fontFamily,
style, row, rowIndex, _char, charIndex, i, len,
fontPaths = fabric.fontPaths, objects = this._objects;
for (i = 0, len = objects.length; i < len; i++) {
obj = objects[i];
fontFamily = obj.fontFamily;
if (obj.type.indexOf('text') === -1 || fontList[fontFamily] || !fontPaths[fontFamily]) {
continue;
}
fontList[fontFamily] = true;
if (!obj.styles) {
continue;
}
style = obj.styles;
for (rowIndex in style) {
row = style[rowIndex];
for (charIndex in row) {
_char = row[charIndex];
fontFamily = _char.fontFamily;
if (!fontList[fontFamily] && fontPaths[fontFamily]) {
fontList[fontFamily] = true;
}
}
}
}
for (var j in fontList) {
markup += [
'\t\t@font-face {\n',
'\t\t\tfont-family: \'', j, '\';\n',
'\t\t\tsrc: url(\'', fontPaths[j], '\');\n',
'\t\t}\n'
].join('');
}
if (markup) {
markup = [
'\t<style type="text/css">',
'<![CDATA[\n',
markup,
']]>',
'</style>\n'
].join('');
}
return markup;
},
/**
* @private
*/
_setSVGObjects: function(markup, reviver) {
var instance, i, len, objects = this._objects;
for (i = 0, len = objects.length; i < len; i++) {
instance = objects[i];
if (instance.excludeFromExport) {
continue;
}
this._setSVGObject(markup, instance, reviver);
}
},
/**
* @private
*/
_setSVGObject: function(markup, instance, reviver) {
markup.push(instance.toSVG(reviver));
},
/**
* @private
*/
_setSVGBgOverlayImage: function(markup, property, reviver) {
if (this[property] && !this[property].excludeFromExport && this[property].toSVG) {
markup.push(this[property].toSVG(reviver));
}
},
/**
* @private
*/
_setSVGBgOverlayColor: function(markup, property) {
var filler = this[property + 'Color'], vpt = this.viewportTransform, finalWidth = this.width,
finalHeight = this.height;
if (!filler) {
return;
}
if (filler.toLive) {
var repeat = filler.repeat, iVpt = fabric.util.invertTransform(vpt), shouldInvert = this[property + 'Vpt'],
additionalTransform = shouldInvert ? fabric.util.matrixToSVG(iVpt) : '';
markup.push(
'<rect transform="' + additionalTransform + ' translate(', finalWidth / 2, ',', finalHeight / 2, ')"',
' x="', filler.offsetX - finalWidth / 2,
'" y="', filler.offsetY - finalHeight / 2, '" ',
'width="',
(repeat === 'repeat-y' || repeat === 'no-repeat'
? filler.source.width
: finalWidth ),
'" height="',
(repeat === 'repeat-x' || repeat === 'no-repeat'
? filler.source.height
: finalHeight),
'" fill="url(#SVGID_' + filler.id + ')"',
'></rect>\n'
);
}
else {
markup.push(
'<rect x="0" y="0" width="100%" height="100%" ',
'fill="', filler, '"',
'></rect>\n'
);
}
},
/* _TO_SVG_END_ */
/**
* Moves an object or the objects of a multiple selection
* to the bottom of the stack of drawn objects
* @param {fabric.Object} object Object to send to back
* @return {fabric.Canvas} thisArg
* @chainable
*/
sendToBack: function (object) {
if (!object) {
return this;
}
var activeSelection = this._activeObject,
i, obj, objs;
if (object === activeSelection && object.type === 'activeSelection') {
objs = activeSelection._objects;
for (i = objs.length; i--;) {
obj = objs[i];
removeFromArray(this._objects, obj);
this._objects.unshift(obj);
}
}
else {
removeFromArray(this._objects, object);
this._objects.unshift(object);
}
this.renderOnAddRemove && this.requestRenderAll();
return this;
},
/**
* Moves an object or the objects of a multiple selection
* to the top of the stack of drawn objects
* @param {fabric.Object} object Object to send
* @return {fabric.Canvas} thisArg
* @chainable
*/
bringToFront: function (object) {
if (!object) {
return this;
}
var activeSelection = this._activeObject,
i, obj, objs;
if (object === activeSelection && object.type === 'activeSelection') {
objs = activeSelection._objects;
for (i = 0; i < objs.length; i++) {
obj = objs[i];
removeFromArray(this._objects, obj);
this._objects.push(obj);
}
}
else {
removeFromArray(this._objects, object);
this._objects.push(object);
}
this.renderOnAddRemove && this.requestRenderAll();
return this;
},
/**
* Moves an object or a selection down in stack of drawn objects
* An optional paramter, intersecting allowes to move the object in behind
* the first intersecting object. Where intersection is calculated with
* bounding box. If no intersection is found, there will not be change in the
* stack.
* @param {fabric.Object} object Object to send
* @param {Boolean} [intersecting] If `true`, send object behind next lower intersecting object
* @return {fabric.Canvas} thisArg
* @chainable
*/
sendBackwards: function (object, intersecting) {
if (!object) {
return this;
}
var activeSelection = this._activeObject,
i, obj, idx, newIdx, objs, objsMoved = 0;
if (object === activeSelection && object.type === 'activeSelection') {
objs = activeSelection._objects;
for (i = 0; i < objs.length; i++) {
obj = objs[i];
idx = this._objects.indexOf(obj);
if (idx > 0 + objsMoved) {
newIdx = idx - 1;
removeFromArray(this._objects, obj);
this._objects.splice(newIdx, 0, obj);
}
objsMoved++;
}
}
else {
idx = this._objects.indexOf(object);
if (idx !== 0) {
// if object is not on the bottom of stack
newIdx = this._findNewLowerIndex(object, idx, intersecting);
removeFromArray(this._objects, object);
this._objects.splice(newIdx, 0, object);
}
}
this.renderOnAddRemove && this.requestRenderAll();
return this;
},
/**
* @private
*/
_findNewLowerIndex: function(object, idx, intersecting) {
var newIdx, i;
if (intersecting) {
newIdx = idx;
// traverse down the stack looking for the nearest intersecting object
for (i = idx - 1; i >= 0; --i) {
var isIntersecting = object.intersectsWithObject(this._objects[i]) ||
object.isContainedWithinObject(this._objects[i]) ||
this._objects[i].isContainedWithinObject(object);
if (isIntersecting) {
newIdx = i;
break;
}
}
}
else {
newIdx = idx - 1;
}
return newIdx;
},
/**
* Moves an object or a selection up in stack of drawn objects
* An optional paramter, intersecting allowes to move the object in front
* of the first intersecting object. Where intersection is calculated with
* bounding box. If no intersection is found, there will not be change in the
* stack.
* @param {fabric.Object} object Object to send
* @param {Boolean} [intersecting] If `true`, send object in front of next upper intersecting object
* @return {fabric.Canvas} thisArg
* @chainable
*/
bringForward: function (object, intersecting) {
if (!object) {
return this;
}
var activeSelection = this._activeObject,
i, obj, idx, newIdx, objs, objsMoved = 0;
if (object === activeSelection && object.type === 'activeSelection') {
objs = activeSelection._objects;
for (i = objs.length; i--;) {
obj = objs[i];
idx = this._objects.indexOf(obj);
if (idx < this._objects.length - 1 - objsMoved) {
newIdx = idx + 1;
removeFromArray(this._objects, obj);
this._objects.splice(newIdx, 0, obj);
}
objsMoved++;
}
}
else {
idx = this._objects.indexOf(object);
if (idx !== this._objects.length - 1) {
// if object is not on top of stack (last item in an array)
newIdx = this._findNewUpperIndex(object, idx, intersecting);
removeFromArray(this._objects, object);
this._objects.splice(newIdx, 0, object);
}
}
this.renderOnAddRemove && this.requestRenderAll();
return this;
},
/**
* @private
*/
_findNewUpperIndex: function(object, idx, intersecting) {
var newIdx, i, len;
if (intersecting) {
newIdx = idx;
// traverse up the stack looking for the nearest intersecting object
for (i = idx + 1, len = this._objects.length; i < len; ++i) {
var isIntersecting = object.intersectsWithObject(this._objects[i]) ||
object.isContainedWithinObject(this._objects[i]) ||
this._objects[i].isContainedWithinObject(object);
if (isIntersecting) {
newIdx = i;
break;
}
}
}
else {
newIdx = idx + 1;
}
return newIdx;
},
/**
* Moves an object to specified level in stack of drawn objects
* @param {fabric.Object} object Object to send
* @param {Number} index Position to move to
* @return {fabric.Canvas} thisArg
* @chainable
*/
moveTo: function (object, index) {
removeFromArray(this._objects, object);
this._objects.splice(index, 0, object);
return this.renderOnAddRemove && this.requestRenderAll();
},
/**
* Clears a canvas element and dispose objects
* @return {fabric.Canvas} thisArg
* @chainable
*/
dispose: function () {
// cancel eventually ongoing renders
if (this.isRendering) {
fabric.util.cancelAnimFrame(this.isRendering);
this.isRendering = 0;
}
this.forEachObject(function(object) {
object.dispose && object.dispose();
});
this._objects = [];
if (this.backgroundImage && this.backgroundImage.dispose) {
this.backgroundImage.dispose();
}
this.backgroundImage = null;
if (this.overlayImage && this.overlayImage.dispose) {
this.overlayImage.dispose();
}
this.overlayImage = null;
this._iTextInstances = null;
this.contextContainer = null;
fabric.util.cleanUpJsdomNode(this.lowerCanvasEl);
this.lowerCanvasEl = undefined;
return this;
},
/**
* Returns a string representation of an instance
* @return {String} string representation of an instance
*/
toString: function () {
return '#<fabric.Canvas (' + this.complexity() + '): ' +
'{ objects: ' + this._objects.length + ' }>';
}
});
extend(fabric.StaticCanvas.prototype, fabric.Observable);
extend(fabric.StaticCanvas.prototype, fabric.Collection);
extend(fabric.StaticCanvas.prototype, fabric.DataURLExporter);
extend(fabric.StaticCanvas, /** @lends fabric.StaticCanvas */ {
/**
* @static
* @type String
* @default
*/
EMPTY_JSON: '{"objects": [], "background": "white"}',
/**
* Provides a way to check support of some of the canvas methods
* (either those of HTMLCanvasElement itself, or rendering context)
*
* @param {String} methodName Method to check support for;
* Could be one of "setLineDash"
* @return {Boolean | null} `true` if method is supported (or at least exists),
* `null` if canvas element or context can not be initialized
*/
supports: function (methodName) {
var el = createCanvasElement();
if (!el || !el.getContext) {
return null;
}
var ctx = el.getContext('2d');
if (!ctx) {
return null;
}
switch (methodName) {
case 'setLineDash':
return typeof ctx.setLineDash !== 'undefined';
default:
return null;
}
}
});
/**
* Returns JSON representation of canvas
* @function
* @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output
* @return {String} JSON string
* @tutorial {@link http://fabricjs.com/fabric-intro-part-3#serialization}
* @see {@link http://jsfiddle.net/fabricjs/pec86/|jsFiddle demo}
* @example <caption>JSON without additional properties</caption>
* var json = canvas.toJSON();
* @example <caption>JSON with additional properties included</caption>
* var json = canvas.toJSON(['lockMovementX', 'lockMovementY', 'lockRotation', 'lockScalingX', 'lockScalingY', 'lockUniScaling']);
* @example <caption>JSON without default values</caption>
* canvas.includeDefaultValues = false;
* var json = canvas.toJSON();
*/
fabric.StaticCanvas.prototype.toJSON = fabric.StaticCanvas.prototype.toObject;
if (fabric.isLikelyNode) {
fabric.StaticCanvas.prototype.createPNGStream = function() {
var impl = getNodeCanvas(this.lowerCanvasEl);
return impl && impl.createPNGStream();
};
fabric.StaticCanvas.prototype.createJPEGStream = function(opts) {
var impl = getNodeCanvas(this.lowerCanvasEl);
return impl && impl.createJPEGStream(opts);
};
}
})();
/**
* BaseBrush class
* @class fabric.BaseBrush
* @see {@link http://fabricjs.com/freedrawing|Freedrawing demo}
*/
fabric.BaseBrush = fabric.util.createClass(/** @lends fabric.BaseBrush.prototype */ {
/**
* Color of a brush
* @type String
* @default
*/
color: 'rgb(0, 0, 0)',
/**
* Width of a brush, has to be a Number, no string literals
* @type Number
* @default
*/
width: 1,
/**
* Shadow object representing shadow of this shape.
* <b>Backwards incompatibility note:</b> This property replaces "shadowColor" (String), "shadowOffsetX" (Number),
* "shadowOffsetY" (Number) and "shadowBlur" (Number) since v1.2.12
* @type fabric.Shadow
* @default
*/
shadow: null,
/**
* Line endings style of a brush (one of "butt", "round", "square")
* @type String
* @default
*/
strokeLineCap: 'round',
/**
* Corner style of a brush (one of "bevel", "round", "miter")
* @type String
* @default
*/
strokeLineJoin: 'round',
/**
* Maximum miter length (used for strokeLineJoin = "miter") of a brush's
* @type Number
* @default
*/
strokeMiterLimit: 10,
/**
* Stroke Dash Array.
* @type Array
* @default
*/
strokeDashArray: null,
/**
* Sets shadow of an object
* @param {Object|String} [options] Options object or string (e.g. "2px 2px 10px rgba(0,0,0,0.2)")
* @return {fabric.Object} thisArg
* @chainable
*/
setShadow: function(options) {
this.shadow = new fabric.Shadow(options);
return this;
},
/**
* Sets brush styles
* @private
*/
_setBrushStyles: function() {
var ctx = this.canvas.contextTop;
ctx.strokeStyle = this.color;
ctx.lineWidth = this.width;
ctx.lineCap = this.strokeLineCap;
ctx.miterLimit = this.strokeMiterLimit;
ctx.lineJoin = this.strokeLineJoin;
if (fabric.StaticCanvas.supports('setLineDash')) {
ctx.setLineDash(this.strokeDashArray || []);
}
},
/**
* Sets the transformation on given context
* @param {RenderingContext2d} ctx context to render on
* @private
*/
_saveAndTransform: function(ctx) {
var v = this.canvas.viewportTransform;
ctx.save();
ctx.transform(v[0], v[1], v[2], v[3], v[4], v[5]);
},
/**
* Sets brush shadow styles
* @private
*/
_setShadow: function() {
if (!this.shadow) {
return;
}
var ctx = this.canvas.contextTop,
zoom = this.canvas.getZoom();
ctx.shadowColor = this.shadow.color;
ctx.shadowBlur = this.shadow.blur * zoom;
ctx.shadowOffsetX = this.shadow.offsetX * zoom;
ctx.shadowOffsetY = this.shadow.offsetY * zoom;
},
needsFullRender: function() {
var color = new fabric.Color(this.color);
return color.getAlpha() < 1 || !!this.shadow;
},
/**
* Removes brush shadow styles
* @private
*/
_resetShadow: function() {
var ctx = this.canvas.contextTop;
ctx.shadowColor = '';
ctx.shadowBlur = ctx.shadowOffsetX = ctx.shadowOffsetY = 0;
}
});
(function() {
/**
* PencilBrush class
* @class fabric.PencilBrush
* @extends fabric.BaseBrush
*/
fabric.PencilBrush = fabric.util.createClass(fabric.BaseBrush, /** @lends fabric.PencilBrush.prototype */ {
/**
* Discard points that are less than `decimate` pixel distant from each other
* @type Number
* @default 0.4
*/
decimate: 0.4,
/**
* Constructor
* @param {fabric.Canvas} canvas
* @return {fabric.PencilBrush} Instance of a pencil brush
*/
initialize: function(canvas) {
this.canvas = canvas;
this._points = [];
},
/**
* Invoked inside on mouse down and mouse move
* @param {Object} pointer
*/
_drawSegment: function (ctx, p1, p2) {
var midPoint = p1.midPointFrom(p2);
ctx.quadraticCurveTo(p1.x, p1.y, midPoint.x, midPoint.y);
return midPoint;
},
/**
* Inovoked on mouse down
* @param {Object} pointer
*/
onMouseDown: function(pointer, options) {
if (!this.canvas._isMainEvent(options.e)) {
return;
}
this._prepareForDrawing(pointer);
// capture coordinates immediately
// this allows to draw dots (when movement never occurs)
this._captureDrawingPath(pointer);
this._render();
},
/**
* Inovoked on mouse move
* @param {Object} pointer
*/
onMouseMove: function(pointer, options) {
if (!this.canvas._isMainEvent(options.e)) {
return;
}
if (this._captureDrawingPath(pointer) && this._points.length > 1) {
if (this.needsFullRender()) {
// redraw curve
// clear top canvas
this.canvas.clearContext(this.canvas.contextTop);
this._render();
}
else {
var points = this._points, length = points.length, ctx = this.canvas.contextTop;
// draw the curve update
this._saveAndTransform(ctx);
if (this.oldEnd) {
ctx.beginPath();
ctx.moveTo(this.oldEnd.x, this.oldEnd.y);
}
this.oldEnd = this._drawSegment(ctx, points[length - 2], points[length - 1], true);
ctx.stroke();
ctx.restore();
}
}
},
/**
* Invoked on mouse up
*/
onMouseUp: function(options) {
if (!this.canvas._isMainEvent(options.e)) {
return true;
}
this.oldEnd = undefined;
this._finalizeAndAddPath();
return false;
},
/**
* @private
* @param {Object} pointer Actual mouse position related to the canvas.
*/
_prepareForDrawing: function(pointer) {
var p = new fabric.Point(pointer.x, pointer.y);
this._reset();
this._addPoint(p);
this.canvas.contextTop.moveTo(p.x, p.y);
},
/**
* @private
* @param {fabric.Point} point Point to be added to points array
*/
_addPoint: function(point) {
if (this._points.length > 1 && point.eq(this._points[this._points.length - 1])) {
return false;
}
this._points.push(point);
return true;
},
/**
* Clear points array and set contextTop canvas style.
* @private
*/
_reset: function() {
this._points = [];
this._setBrushStyles();
this._setShadow();
},
/**
* @private
* @param {Object} pointer Actual mouse position related to the canvas.
*/
_captureDrawingPath: function(pointer) {
var pointerPoint = new fabric.Point(pointer.x, pointer.y);
return this._addPoint(pointerPoint);
},
/**
* Draw a smooth path on the topCanvas using quadraticCurveTo
* @private
*/
_render: function() {
var ctx = this.canvas.contextTop, i, len,
p1 = this._points[0],
p2 = this._points[1];
this._saveAndTransform(ctx);
ctx.beginPath();
//if we only have 2 points in the path and they are the same
//it means that the user only clicked the canvas without moving the mouse
//then we should be drawing a dot. A path isn't drawn between two identical dots
//that's why we set them apart a bit
if (this._points.length === 2 && p1.x === p2.x && p1.y === p2.y) {
var width = this.width / 1000;
p1 = new fabric.Point(p1.x, p1.y);
p2 = new fabric.Point(p2.x, p2.y);
p1.x -= width;
p2.x += width;
}
ctx.moveTo(p1.x, p1.y);
for (i = 1, len = this._points.length; i < len; i++) {
// we pick the point between pi + 1 & pi + 2 as the
// end point and p1 as our control point.
this._drawSegment(ctx, p1, p2);
p1 = this._points[i];
p2 = this._points[i + 1];
}
// Draw last line as a straight line while
// we wait for the next point to be able to calculate
// the bezier control point
ctx.lineTo(p1.x, p1.y);
ctx.stroke();
ctx.restore();
},
/**
* Converts points to SVG path
* @param {Array} points Array of points
* @return {String} SVG path
*/
convertPointsToSVGPath: function(points) {
var path = [], i, width = this.width / 1000,
p1 = new fabric.Point(points[0].x, points[0].y),
p2 = new fabric.Point(points[1].x, points[1].y),
len = points.length, multSignX = 1, multSignY = 0, manyPoints = len > 2;
if (manyPoints) {
multSignX = points[2].x < p2.x ? -1 : points[2].x === p2.x ? 0 : 1;
multSignY = points[2].y < p2.y ? -1 : points[2].y === p2.y ? 0 : 1;
}
path.push('M ', p1.x - multSignX * width, ' ', p1.y - multSignY * width, ' ');
for (i = 1; i < len; i++) {
if (!p1.eq(p2)) {
var midPoint = p1.midPointFrom(p2);
// p1 is our bezier control point
// midpoint is our endpoint
// start point is p(i-1) value.
path.push('Q ', p1.x, ' ', p1.y, ' ', midPoint.x, ' ', midPoint.y, ' ');
}
p1 = points[i];
if ((i + 1) < points.length) {
p2 = points[i + 1];
}
}
if (manyPoints) {
multSignX = p1.x > points[i - 2].x ? 1 : p1.x === points[i - 2].x ? 0 : -1;
multSignY = p1.y > points[i - 2].y ? 1 : p1.y === points[i - 2].y ? 0 : -1;
}
path.push('L ', p1.x + multSignX * width, ' ', p1.y + multSignY * width);
return path;
},
/**
* Creates fabric.Path object to add on canvas
* @param {String} pathData Path data
* @return {fabric.Path} Path to add on canvas
*/
createPath: function(pathData) {
var path = new fabric.Path(pathData, {
fill: null,
stroke: this.color,
strokeWidth: this.width,
strokeLineCap: this.strokeLineCap,
strokeMiterLimit: this.strokeMiterLimit,
strokeLineJoin: this.strokeLineJoin,
strokeDashArray: this.strokeDashArray,
});
if (this.shadow) {
this.shadow.affectStroke = true;
path.setShadow(this.shadow);
}
return path;
},
/**
* Decimate poins array with the decimate value
*/
decimatePoints: function(points, distance) {
if (points.length <= 2) {
return points;
}
var zoom = this.canvas.getZoom(), adjustedDistance = Math.pow(distance / zoom, 2),
i, l = points.length - 1, lastPoint = points[0], newPoints = [lastPoint],
cDistance;
for (i = 1; i < l; i++) {
cDistance = Math.pow(lastPoint.x - points[i].x, 2) + Math.pow(lastPoint.y - points[i].y, 2);
if (cDistance >= adjustedDistance) {
lastPoint = points[i];
newPoints.push(lastPoint);
}
}
if (newPoints.length === 1) {
newPoints.push(new fabric.Point(newPoints[0].x, newPoints[0].y));
}
return newPoints;
},
/**
* On mouseup after drawing the path on contextTop canvas
* we use the points captured to create an new fabric path object
* and add it to the fabric canvas.
*/
_finalizeAndAddPath: function() {
var ctx = this.canvas.contextTop;
ctx.closePath();
if (this.decimate) {
this._points = this.decimatePoints(this._points, this.decimate);
}
var pathData = this.convertPointsToSVGPath(this._points).join('');
if (pathData === 'M 0 0 Q 0 0 0 0 L 0 0') {
// do not create 0 width/height paths, as they are
// rendered inconsistently across browsers
// Firefox 4, for example, renders a dot,
// whereas Chrome 10 renders nothing
this.canvas.requestRenderAll();
return;
}
var path = this.createPath(pathData);
this.canvas.clearContext(this.canvas.contextTop);
this.canvas.add(path);
this.canvas.renderAll();
path.setCoords();
this._resetShadow();
// fire event 'path' created
this.canvas.fire('path:created', { path: path });
}
});
})();
/**
* CircleBrush class
* @class fabric.CircleBrush
*/
fabric.CircleBrush = fabric.util.createClass(fabric.BaseBrush, /** @lends fabric.CircleBrush.prototype */ {
/**
* Width of a brush
* @type Number
* @default
*/
width: 10,
/**
* Constructor
* @param {fabric.Canvas} canvas
* @return {fabric.CircleBrush} Instance of a circle brush
*/
initialize: function(canvas) {
this.canvas = canvas;
this.points = [];
},
/**
* Invoked inside on mouse down and mouse move
* @param {Object} pointer
*/
drawDot: function(pointer) {
var point = this.addPoint(pointer),
ctx = this.canvas.contextTop;
this._saveAndTransform(ctx);
this.dot(ctx, point);
ctx.restore();
},
dot: function(ctx, point) {
ctx.fillStyle = point.fill;
ctx.beginPath();
ctx.arc(point.x, point.y, point.radius, 0, Math.PI * 2, false);
ctx.closePath();
ctx.fill();
},
/**
* Invoked on mouse down
*/
onMouseDown: function(pointer) {
this.points.length = 0;
this.canvas.clearContext(this.canvas.contextTop);
this._setShadow();
this.drawDot(pointer);
},
/**
* Render the full state of the brush
* @private
*/
_render: function() {
var ctx = this.canvas.contextTop, i, len,
points = this.points;
this._saveAndTransform(ctx);
for (i = 0, len = points.length; i < len; i++) {
this.dot(ctx, points[i]);
}
ctx.restore();
},
/**
* Invoked on mouse move
* @param {Object} pointer
*/
onMouseMove: function(pointer) {
if (this.needsFullRender()) {
this.canvas.clearContext(this.canvas.contextTop);
this.addPoint(pointer);
this._render();
}
else {
this.drawDot(pointer);
}
},
/**
* Invoked on mouse up
*/
onMouseUp: function() {
var originalRenderOnAddRemove = this.canvas.renderOnAddRemove, i, len;
this.canvas.renderOnAddRemove = false;
var circles = [];
for (i = 0, len = this.points.length; i < len; i++) {
var point = this.points[i],
circle = new fabric.Circle({
radius: point.radius,
left: point.x,
top: point.y,
originX: 'center',
originY: 'center',
fill: point.fill
});
this.shadow && circle.setShadow(this.shadow);
circles.push(circle);
}
var group = new fabric.Group(circles);
group.canvas = this.canvas;
this.canvas.add(group);
this.canvas.fire('path:created', { path: group });
this.canvas.clearContext(this.canvas.contextTop);
this._resetShadow();
this.canvas.renderOnAddRemove = originalRenderOnAddRemove;
this.canvas.requestRenderAll();
},
/**
* @param {Object} pointer
* @return {fabric.Point} Just added pointer point
*/
addPoint: function(pointer) {
var pointerPoint = new fabric.Point(pointer.x, pointer.y),
circleRadius = fabric.util.getRandomInt(
Math.max(0, this.width - 20), this.width + 20) / 2,
circleColor = new fabric.Color(this.color)
.setAlpha(fabric.util.getRandomInt(0, 100) / 100)
.toRgba();
pointerPoint.radius = circleRadius;
pointerPoint.fill = circleColor;
this.points.push(pointerPoint);
return pointerPoint;
}
});
/**
* SprayBrush class
* @class fabric.SprayBrush
*/
fabric.SprayBrush = fabric.util.createClass( fabric.BaseBrush, /** @lends fabric.SprayBrush.prototype */ {
/**
* Width of a spray
* @type Number
* @default
*/
width: 10,
/**
* Density of a spray (number of dots per chunk)
* @type Number
* @default
*/
density: 20,
/**
* Width of spray dots
* @type Number
* @default
*/
dotWidth: 1,
/**
* Width variance of spray dots
* @type Number
* @default
*/
dotWidthVariance: 1,
/**
* Whether opacity of a dot should be random
* @type Boolean
* @default
*/
randomOpacity: false,
/**
* Whether overlapping dots (rectangles) should be removed (for performance reasons)
* @type Boolean
* @default
*/
optimizeOverlapping: true,
/**
* Constructor
* @param {fabric.Canvas} canvas
* @return {fabric.SprayBrush} Instance of a spray brush
*/
initialize: function(canvas) {
this.canvas = canvas;
this.sprayChunks = [];
},
/**
* Invoked on mouse down
* @param {Object} pointer
*/
onMouseDown: function(pointer) {
this.sprayChunks.length = 0;
this.canvas.clearContext(this.canvas.contextTop);
this._setShadow();
this.addSprayChunk(pointer);
this.render(this.sprayChunkPoints);
},
/**
* Invoked on mouse move
* @param {Object} pointer
*/
onMouseMove: function(pointer) {
this.addSprayChunk(pointer);
this.render(this.sprayChunkPoints);
},
/**
* Invoked on mouse up
*/
onMouseUp: function() {
var originalRenderOnAddRemove = this.canvas.renderOnAddRemove;
this.canvas.renderOnAddRemove = false;
var rects = [];
for (var i = 0, ilen = this.sprayChunks.length; i < ilen; i++) {
var sprayChunk = this.sprayChunks[i];
for (var j = 0, jlen = sprayChunk.length; j < jlen; j++) {
var rect = new fabric.Rect({
width: sprayChunk[j].width,
height: sprayChunk[j].width,
left: sprayChunk[j].x + 1,
top: sprayChunk[j].y + 1,
originX: 'center',
originY: 'center',
fill: this.color
});
rects.push(rect);
}
}
if (this.optimizeOverlapping) {
rects = this._getOptimizedRects(rects);
}
var group = new fabric.Group(rects);
this.shadow && group.setShadow(this.shadow);
this.canvas.add(group);
this.canvas.fire('path:created', { path: group });
this.canvas.clearContext(this.canvas.contextTop);
this._resetShadow();
this.canvas.renderOnAddRemove = originalRenderOnAddRemove;
this.canvas.requestRenderAll();
},
/**
* @private
* @param {Array} rects
*/
_getOptimizedRects: function(rects) {
// avoid creating duplicate rects at the same coordinates
var uniqueRects = { }, key, i, len;
for (i = 0, len = rects.length; i < len; i++) {
key = rects[i].left + '' + rects[i].top;
if (!uniqueRects[key]) {
uniqueRects[key] = rects[i];
}
}
var uniqueRectsArray = [];
for (key in uniqueRects) {
uniqueRectsArray.push(uniqueRects[key]);
}
return uniqueRectsArray;
},
/**
* Render new chunk of spray brush
*/
render: function(sprayChunk) {
var ctx = this.canvas.contextTop, i, len;
ctx.fillStyle = this.color;
this._saveAndTransform(ctx);
for (i = 0, len = sprayChunk.length; i < len; i++) {
var point = sprayChunk[i];
if (typeof point.opacity !== 'undefined') {
ctx.globalAlpha = point.opacity;
}
ctx.fillRect(point.x, point.y, point.width, point.width);
}
ctx.restore();
},
/**
* Render all spray chunks
*/
_render: function() {
var ctx = this.canvas.contextTop, i, ilen;
ctx.fillStyle = this.color;
this._saveAndTransform(ctx);
for (i = 0, ilen = this.sprayChunks.length; i < ilen; i++) {
this.render(this.sprayChunks[i]);
}
ctx.restore();
},
/**
* @param {Object} pointer
*/
addSprayChunk: function(pointer) {
this.sprayChunkPoints = [];
var x, y, width, radius = this.width / 2, i;
for (i = 0; i < this.density; i++) {
x = fabric.util.getRandomInt(pointer.x - radius, pointer.x + radius);
y = fabric.util.getRandomInt(pointer.y - radius, pointer.y + radius);
if (this.dotWidthVariance) {
width = fabric.util.getRandomInt(
// bottom clamp width to 1
Math.max(1, this.dotWidth - this.dotWidthVariance),
this.dotWidth + this.dotWidthVariance);
}
else {
width = this.dotWidth;
}
var point = new fabric.Point(x, y);
point.width = width;
if (this.randomOpacity) {
point.opacity = fabric.util.getRandomInt(0, 100) / 100;
}
this.sprayChunkPoints.push(point);
}
this.sprayChunks.push(this.sprayChunkPoints);
}
});
/**
* PatternBrush class
* @class fabric.PatternBrush
* @extends fabric.BaseBrush
*/
fabric.PatternBrush = fabric.util.createClass(fabric.PencilBrush, /** @lends fabric.PatternBrush.prototype */ {
getPatternSrc: function() {
var dotWidth = 20,
dotDistance = 5,
patternCanvas = fabric.util.createCanvasElement(),
patternCtx = patternCanvas.getContext('2d');
patternCanvas.width = patternCanvas.height = dotWidth + dotDistance;
patternCtx.fillStyle = this.color;
patternCtx.beginPath();
patternCtx.arc(dotWidth / 2, dotWidth / 2, dotWidth / 2, 0, Math.PI * 2, false);
patternCtx.closePath();
patternCtx.fill();
return patternCanvas;
},
getPatternSrcFunction: function() {
return String(this.getPatternSrc).replace('this.color', '"' + this.color + '"');
},
/**
* Creates "pattern" instance property
*/
getPattern: function() {
return this.canvas.contextTop.createPattern(this.source || this.getPatternSrc(), 'repeat');
},
/**
* Sets brush styles
*/
_setBrushStyles: function() {
this.callSuper('_setBrushStyles');
this.canvas.contextTop.strokeStyle = this.getPattern();
},
/**
* Creates path
*/
createPath: function(pathData) {
var path = this.callSuper('createPath', pathData),
topLeft = path._getLeftTopCoords().scalarAdd(path.strokeWidth / 2);
path.stroke = new fabric.Pattern({
source: this.source || this.getPatternSrcFunction(),
offsetX: -topLeft.x,
offsetY: -topLeft.y
});
return path;
}
});
(function() {
var getPointer = fabric.util.getPointer,
degreesToRadians = fabric.util.degreesToRadians,
radiansToDegrees = fabric.util.radiansToDegrees,
atan2 = Math.atan2,
abs = Math.abs,
supportLineDash = fabric.StaticCanvas.supports('setLineDash'),
STROKE_OFFSET = 0.5;
/**
* Canvas class
* @class fabric.Canvas
* @extends fabric.StaticCanvas
* @tutorial {@link http://fabricjs.com/fabric-intro-part-1#canvas}
* @see {@link fabric.Canvas#initialize} for constructor definition
*
* @fires object:modified
* @fires object:rotated
* @fires object:scaled
* @fires object:moved
* @fires object:skewed
* @fires object:rotating
* @fires object:scaling
* @fires object:moving
* @fires object:skewing
* @fires object:selected this event is deprecated. use selection:created
*
* @fires before:transform
* @fires before:selection:cleared
* @fires selection:cleared
* @fires selection:updated
* @fires selection:created
*
* @fires path:created
* @fires mouse:down
* @fires mouse:move
* @fires mouse:up
* @fires mouse:down:before
* @fires mouse:move:before
* @fires mouse:up:before
* @fires mouse:over
* @fires mouse:out
* @fires mouse:dblclick
*
* @fires dragover
* @fires dragenter
* @fires dragleave
* @fires drop
*
*/
fabric.Canvas = fabric.util.createClass(fabric.StaticCanvas, /** @lends fabric.Canvas.prototype */ {
/**
* Constructor
* @param {HTMLElement | String} el &lt;canvas> element to initialize instance on
* @param {Object} [options] Options object
* @return {Object} thisArg
*/
initialize: function(el, options) {
options || (options = { });
this.renderAndResetBound = this.renderAndReset.bind(this);
this.requestRenderAllBound = this.requestRenderAll.bind(this);
this._initStatic(el, options);
this._initInteractive();
this._createCacheCanvas();
},
/**
* When true, objects can be transformed by one side (unproportionally)
* @type Boolean
* @default
*/
uniScaleTransform: false,
/**
* Indicates which key enable unproportional scaling
* values: 'altKey', 'shiftKey', 'ctrlKey'.
* If `null` or 'none' or any other string that is not a modifier key
* feature is disabled feature disabled.
* @since 1.6.2
* @type String
* @default
*/
uniScaleKey: 'shiftKey',
/**
* When true, objects use center point as the origin of scale transformation.
* <b>Backwards incompatibility note:</b> This property replaces "centerTransform" (Boolean).
* @since 1.3.4
* @type Boolean
* @default
*/
centeredScaling: false,
/**
* When true, objects use center point as the origin of rotate transformation.
* <b>Backwards incompatibility note:</b> This property replaces "centerTransform" (Boolean).
* @since 1.3.4
* @type Boolean
* @default
*/
centeredRotation: false,
/**
* Indicates which key enable centered Transform
* values: 'altKey', 'shiftKey', 'ctrlKey'.
* If `null` or 'none' or any other string that is not a modifier key
* feature is disabled feature disabled.
* @since 1.6.2
* @type String
* @default
*/
centeredKey: 'altKey',
/**
* Indicates which key enable alternate action on corner
* values: 'altKey', 'shiftKey', 'ctrlKey'.
* If `null` or 'none' or any other string that is not a modifier key
* feature is disabled feature disabled.
* @since 1.6.2
* @type String
* @default
*/
altActionKey: 'shiftKey',
/**
* Indicates that canvas is interactive. This property should not be changed.
* @type Boolean
* @default
*/
interactive: true,
/**
* Indicates whether group selection should be enabled
* @type Boolean
* @default
*/
selection: true,
/**
* Indicates which key or keys enable multiple click selection
* Pass value as a string or array of strings
* values: 'altKey', 'shiftKey', 'ctrlKey'.
* If `null` or empty or containing any other string that is not a modifier key
* feature is disabled.
* @since 1.6.2
* @type String|Array
* @default
*/
selectionKey: 'shiftKey',
/**
* Indicates which key enable alternative selection
* in case of target overlapping with active object
* values: 'altKey', 'shiftKey', 'ctrlKey'.
* For a series of reason that come from the general expectations on how
* things should work, this feature works only for preserveObjectStacking true.
* If `null` or 'none' or any other string that is not a modifier key
* feature is disabled.
* @since 1.6.5
* @type null|String
* @default
*/
altSelectionKey: null,
/**
* Color of selection
* @type String
* @default
*/
selectionColor: 'rgba(100, 100, 255, 0.3)', // blue
/**
* Default dash array pattern
* If not empty the selection border is dashed
* @type Array
*/
selectionDashArray: [],
/**
* Color of the border of selection (usually slightly darker than color of selection itself)
* @type String
* @default
*/
selectionBorderColor: 'rgba(255, 255, 255, 0.3)',
/**
* Width of a line used in object/group selection
* @type Number
* @default
*/
selectionLineWidth: 1,
/**
* Select only shapes that are fully contained in the dragged selection rectangle.
* @type Boolean
* @default
*/
selectionFullyContained: false,
/**
* Default cursor value used when hovering over an object on canvas
* @type String
* @default
*/
hoverCursor: 'move',
/**
* Default cursor value used when moving an object on canvas
* @type String
* @default
*/
moveCursor: 'move',
/**
* Default cursor value used for the entire canvas
* @type String
* @default
*/
defaultCursor: 'default',
/**
* Cursor value used during free drawing
* @type String
* @default
*/
freeDrawingCursor: 'crosshair',
/**
* Cursor value used for rotation point
* @type String
* @default
*/
rotationCursor: 'crosshair',
/**
* Cursor value used for disabled elements ( corners with disabled action )
* @type String
* @since 2.0.0
* @default
*/
notAllowedCursor: 'not-allowed',
/**
* Default element class that's given to wrapper (div) element of canvas
* @type String
* @default
*/
containerClass: 'canvas-container',
/**
* When true, object detection happens on per-pixel basis rather than on per-bounding-box
* @type Boolean
* @default
*/
perPixelTargetFind: false,
/**
* Number of pixels around target pixel to tolerate (consider active) during object detection
* @type Number
* @default
*/
targetFindTolerance: 0,
/**
* When true, target detection is skipped when hovering over canvas. This can be used to improve performance.
* @type Boolean
* @default
*/
skipTargetFind: false,
/**
* When true, mouse events on canvas (mousedown/mousemove/mouseup) result in free drawing.
* After mousedown, mousemove creates a shape,
* and then mouseup finalizes it and adds an instance of `fabric.Path` onto canvas.
* @tutorial {@link http://fabricjs.com/fabric-intro-part-4#free_drawing}
* @type Boolean
* @default
*/
isDrawingMode: false,
/**
* Indicates whether objects should remain in current stack position when selected.
* When false objects are brought to top and rendered as part of the selection group
* @type Boolean
* @default
*/
preserveObjectStacking: false,
/**
* Indicates the angle that an object will lock to while rotating.
* @type Number
* @since 1.6.7
* @default
*/
snapAngle: 0,
/**
* Indicates the distance from the snapAngle the rotation will lock to the snapAngle.
* When `null`, the snapThreshold will default to the snapAngle.
* @type null|Number
* @since 1.6.7
* @default
*/
snapThreshold: null,
/**
* Indicates if the right click on canvas can output the context menu or not
* @type Boolean
* @since 1.6.5
* @default
*/
stopContextMenu: false,
/**
* Indicates if the canvas can fire right click events
* @type Boolean
* @since 1.6.5
* @default
*/
fireRightClick: false,
/**
* Indicates if the canvas can fire middle click events
* @type Boolean
* @since 1.7.8
* @default
*/
fireMiddleClick: false,
/**
* @private
*/
_initInteractive: function() {
this._currentTransform = null;
this._groupSelector = null;
this._initWrapperElement();
this._createUpperCanvas();
this._initEventListeners();
this._initRetinaScaling();
this.freeDrawingBrush = fabric.PencilBrush && new fabric.PencilBrush(this);
this.calcOffset();
},
/**
* Divides objects in two groups, one to render immediately
* and one to render as activeGroup.
* @return {Array} objects to render immediately and pushes the other in the activeGroup.
*/
_chooseObjectsToRender: function() {
var activeObjects = this.getActiveObjects(),
object, objsToRender, activeGroupObjects;
if (activeObjects.length > 0 && !this.preserveObjectStacking) {
objsToRender = [];
activeGroupObjects = [];
for (var i = 0, length = this._objects.length; i < length; i++) {
object = this._objects[i];
if (activeObjects.indexOf(object) === -1 ) {
objsToRender.push(object);
}
else {
activeGroupObjects.push(object);
}
}
if (activeObjects.length > 1) {
this._activeObject._objects = activeGroupObjects;
}
objsToRender.push.apply(objsToRender, activeGroupObjects);
}
else {
objsToRender = this._objects;
}
return objsToRender;
},
/**
* Renders both the top canvas and the secondary container canvas.
* @return {fabric.Canvas} instance
* @chainable
*/
renderAll: function () {
if (this.contextTopDirty && !this._groupSelector && !this.isDrawingMode) {
this.clearContext(this.contextTop);
this.contextTopDirty = false;
}
if (this.hasLostContext) {
this.renderTopLayer(this.contextTop);
}
var canvasToDrawOn = this.contextContainer;
this.renderCanvas(canvasToDrawOn, this._chooseObjectsToRender());
return this;
},
renderTopLayer: function(ctx) {
ctx.save();
if (this.isDrawingMode && this._isCurrentlyDrawing) {
this.freeDrawingBrush && this.freeDrawingBrush._render();
this.contextTopDirty = true;
}
// we render the top context - last object
if (this.selection && this._groupSelector) {
this._drawSelection(ctx);
this.contextTopDirty = true;
}
ctx.restore();
},
/**
* Method to render only the top canvas.
* Also used to render the group selection box.
* @return {fabric.Canvas} thisArg
* @chainable
*/
renderTop: function () {
var ctx = this.contextTop;
this.clearContext(ctx);
this.renderTopLayer(ctx);
this.fire('after:render');
return this;
},
/**
* Resets the current transform to its original values and chooses the type of resizing based on the event
* @private
*/
_resetCurrentTransform: function() {
var t = this._currentTransform;
t.target.set({
scaleX: t.original.scaleX,
scaleY: t.original.scaleY,
skewX: t.original.skewX,
skewY: t.original.skewY,
left: t.original.left,
top: t.original.top
});
if (this._shouldCenterTransform(t.target)) {
if (t.originX !== 'center') {
if (t.originX === 'right') {
t.mouseXSign = -1;
}
else {
t.mouseXSign = 1;
}
}
if (t.originY !== 'center') {
if (t.originY === 'bottom') {
t.mouseYSign = -1;
}
else {
t.mouseYSign = 1;
}
}
t.originX = 'center';
t.originY = 'center';
}
else {
t.originX = t.original.originX;
t.originY = t.original.originY;
}
},
/**
* Checks if point is contained within an area of given object
* @param {Event} e Event object
* @param {fabric.Object} target Object to test against
* @param {Object} [point] x,y object of point coordinates we want to check.
* @return {Boolean} true if point is contained within an area of given object
*/
containsPoint: function (e, target, point) {
var ignoreZoom = true,
pointer = point || this.getPointer(e, ignoreZoom),
xy;
if (target.group && target.group === this._activeObject && target.group.type === 'activeSelection') {
xy = this._normalizePointer(target.group, pointer);
}
else {
xy = { x: pointer.x, y: pointer.y };
}
// http://www.geog.ubc.ca/courses/klink/gis.notes/ncgia/u32.html
// http://idav.ucdavis.edu/~okreylos/TAship/Spring2000/PointInPolygon.html
return (target.containsPoint(xy) || target._findTargetCorner(pointer));
},
/**
* @private
*/
_normalizePointer: function (object, pointer) {
var m = object.calcTransformMatrix(),
invertedM = fabric.util.invertTransform(m),
vptPointer = this.restorePointerVpt(pointer);
return fabric.util.transformPoint(vptPointer, invertedM);
},
/**
* Returns true if object is transparent at a certain location
* @param {fabric.Object} target Object to check
* @param {Number} x Left coordinate
* @param {Number} y Top coordinate
* @return {Boolean}
*/
isTargetTransparent: function (target, x, y) {
// in case the target is the activeObject, we cannot execute this optimization
// because we need to draw controls too.
if (target.shouldCache() && target._cacheCanvas && target !== this._activeObject) {
var normalizedPointer = this._normalizePointer(target, {x: x, y: y}),
targetRelativeX = Math.max(target.cacheTranslationX + (normalizedPointer.x * target.zoomX), 0),
targetRelativeY = Math.max(target.cacheTranslationY + (normalizedPointer.y * target.zoomY), 0);
var isTransparent = fabric.util.isTransparent(
target._cacheContext, Math.round(targetRelativeX), Math.round(targetRelativeY), this.targetFindTolerance);
return isTransparent;
}
var ctx = this.contextCache,
originalColor = target.selectionBackgroundColor, v = this.viewportTransform;
target.selectionBackgroundColor = '';
this.clearContext(ctx);
ctx.save();
ctx.transform(v[0], v[1], v[2], v[3], v[4], v[5]);
target.render(ctx);
ctx.restore();
target === this._activeObject && target._renderControls(ctx, {
hasBorders: false,
transparentCorners: false
}, {
hasBorders: false,
});
target.selectionBackgroundColor = originalColor;
var isTransparent = fabric.util.isTransparent(
ctx, x, y, this.targetFindTolerance);
return isTransparent;
},
/**
* takes an event and determins if selection key has been pressed
* @private
* @param {Event} e Event object
*/
_isSelectionKeyPressed: function(e) {
var selectionKeyPressed = false;
if (Object.prototype.toString.call(this.selectionKey) === '[object Array]') {
selectionKeyPressed = !!this.selectionKey.find(function(key) { return e[key] === true; });
}
else {
selectionKeyPressed = e[this.selectionKey];
}
return selectionKeyPressed;
},
/**
* @private
* @param {Event} e Event object
* @param {fabric.Object} target
*/
_shouldClearSelection: function (e, target) {
var activeObjects = this.getActiveObjects(),
activeObject = this._activeObject;
return (
!target
||
(target &&
activeObject &&
activeObjects.length > 1 &&
activeObjects.indexOf(target) === -1 &&
activeObject !== target &&
!this._isSelectionKeyPressed(e))
||
(target && !target.evented)
||
(target &&
!target.selectable &&
activeObject &&
activeObject !== target)
);
},
/**
* centeredScaling from object can't override centeredScaling from canvas.
* this should be fixed, since object setting should take precedence over canvas.
* @private
* @param {fabric.Object} target
*/
_shouldCenterTransform: function (target) {
if (!target) {
return;
}
var t = this._currentTransform,
centerTransform;
if (t.action === 'scale' || t.action === 'scaleX' || t.action === 'scaleY') {
centerTransform = this.centeredScaling || target.centeredScaling;
}
else if (t.action === 'rotate') {
centerTransform = this.centeredRotation || target.centeredRotation;
}
return centerTransform ? !t.altKey : t.altKey;
},
/**
* @private
*/
_getOriginFromCorner: function(target, corner) {
var origin = {
x: target.originX,
y: target.originY
};
if (corner === 'ml' || corner === 'tl' || corner === 'bl') {
origin.x = 'right';
}
else if (corner === 'mr' || corner === 'tr' || corner === 'br') {
origin.x = 'left';
}
if (corner === 'tl' || corner === 'mt' || corner === 'tr') {
origin.y = 'bottom';
}
else if (corner === 'bl' || corner === 'mb' || corner === 'br') {
origin.y = 'top';
}
return origin;
},
/**
* @private
* @param {Boolean} alreadySelected true if target is already selected
* @param {String} corner a string representing the corner ml, mr, tl ...
* @param {Event} e Event object
* @param {fabric.Object} [target] inserted back to help overriding. Unused
*/
_getActionFromCorner: function(alreadySelected, corner, e /* target */) {
if (!corner || !alreadySelected) {
return 'drag';
}
switch (corner) {
case 'mtr':
return 'rotate';
case 'ml':
case 'mr':
return e[this.altActionKey] ? 'skewY' : 'scaleX';
case 'mt':
case 'mb':
return e[this.altActionKey] ? 'skewX' : 'scaleY';
default:
return 'scale';
}
},
/**
* @private
* @param {Event} e Event object
* @param {fabric.Object} target
*/
_setupCurrentTransform: function (e, target, alreadySelected) {
if (!target) {
return;
}
var pointer = this.getPointer(e),
corner = target._findTargetCorner(this.getPointer(e, true)),
action = this._getActionFromCorner(alreadySelected, corner, e, target),
origin = this._getOriginFromCorner(target, corner);
this._currentTransform = {
target: target,
action: action,
corner: corner,
scaleX: target.scaleX,
scaleY: target.scaleY,
skewX: target.skewX,
skewY: target.skewY,
// used by transation
offsetX: pointer.x - target.left,
offsetY: pointer.y - target.top,
originX: origin.x,
originY: origin.y,
ex: pointer.x,
ey: pointer.y,
lastX: pointer.x,
lastY: pointer.y,
// unsure they are usefull anymore.
// left: target.left,
// top: target.top,
theta: degreesToRadians(target.angle),
// end of unsure
width: target.width * target.scaleX,
mouseXSign: 1,
mouseYSign: 1,
shiftKey: e.shiftKey,
altKey: e[this.centeredKey],
original: fabric.util.saveObjectTransform(target),
};
this._currentTransform.original.originX = origin.x;
this._currentTransform.original.originY = origin.y;
this._resetCurrentTransform();
this._beforeTransform(e);
},
/**
* Translates object by "setting" its left/top
* @private
* @param {Number} x pointer's x coordinate
* @param {Number} y pointer's y coordinate
* @return {Boolean} true if the translation occurred
*/
_translateObject: function (x, y) {
var transform = this._currentTransform,
target = transform.target,
newLeft = x - transform.offsetX,
newTop = y - transform.offsetY,
moveX = !target.get('lockMovementX') && target.left !== newLeft,
moveY = !target.get('lockMovementY') && target.top !== newTop;
moveX && target.set('left', newLeft);
moveY && target.set('top', newTop);
return moveX || moveY;
},
/**
* Check if we are increasing a positive skew or lower it,
* checking mouse direction and pressed corner.
* @private
*/
_changeSkewTransformOrigin: function(mouseMove, t, by) {
var property = 'originX', origins = { 0: 'center' },
skew = t.target.skewX, originA = 'left', originB = 'right',
corner = t.corner === 'mt' || t.corner === 'ml' ? 1 : -1,
flipSign = 1;
mouseMove = mouseMove > 0 ? 1 : -1;
if (by === 'y') {
skew = t.target.skewY;
originA = 'top';
originB = 'bottom';
property = 'originY';
}
origins[-1] = originA;
origins[1] = originB;
t.target.flipX && (flipSign *= -1);
t.target.flipY && (flipSign *= -1);
if (skew === 0) {
t.skewSign = -corner * mouseMove * flipSign;
t[property] = origins[-mouseMove];
}
else {
skew = skew > 0 ? 1 : -1;
t.skewSign = skew;
t[property] = origins[skew * corner * flipSign];
}
},
/**
* Skew object by mouse events
* @private
* @param {Number} x pointer's x coordinate
* @param {Number} y pointer's y coordinate
* @param {String} by Either 'x' or 'y'
* @return {Boolean} true if the skewing occurred
*/
_skewObject: function (x, y, by) {
var t = this._currentTransform,
target = t.target, skewed = false,
lockSkewingX = target.get('lockSkewingX'),
lockSkewingY = target.get('lockSkewingY');
if ((lockSkewingX && by === 'x') || (lockSkewingY && by === 'y')) {
return false;
}
// Get the constraint point
var center = target.getCenterPoint(),
actualMouseByCenter = target.toLocalPoint(new fabric.Point(x, y), 'center', 'center')[by],
lastMouseByCenter = target.toLocalPoint(new fabric.Point(t.lastX, t.lastY), 'center', 'center')[by],
actualMouseByOrigin, constraintPosition, dim = target._getTransformedDimensions();
this._changeSkewTransformOrigin(actualMouseByCenter - lastMouseByCenter, t, by);
actualMouseByOrigin = target.toLocalPoint(new fabric.Point(x, y), t.originX, t.originY)[by];
constraintPosition = target.translateToOriginPoint(center, t.originX, t.originY);
// Actually skew the object
skewed = this._setObjectSkew(actualMouseByOrigin, t, by, dim);
t.lastX = x;
t.lastY = y;
// Make sure the constraints apply
target.setPositionByOrigin(constraintPosition, t.originX, t.originY);
return skewed;
},
/**
* Set object skew
* @private
* @return {Boolean} true if the skewing occurred
*/
_setObjectSkew: function(localMouse, transform, by, _dim) {
var target = transform.target, newValue, skewed = false,
skewSign = transform.skewSign, newDim, dimNoSkew,
otherBy, _otherBy, _by, newDimMouse, skewX, skewY;
if (by === 'x') {
otherBy = 'y';
_otherBy = 'Y';
_by = 'X';
skewX = 0;
skewY = target.skewY;
}
else {
otherBy = 'x';
_otherBy = 'X';
_by = 'Y';
skewX = target.skewX;
skewY = 0;
}
dimNoSkew = target._getTransformedDimensions(skewX, skewY);
newDimMouse = 2 * Math.abs(localMouse) - dimNoSkew[by];
if (newDimMouse <= 2) {
newValue = 0;
}
else {
newValue = skewSign * Math.atan((newDimMouse / target['scale' + _by]) /
(dimNoSkew[otherBy] / target['scale' + _otherBy]));
newValue = fabric.util.radiansToDegrees(newValue);
}
skewed = target['skew' + _by] !== newValue;
target.set('skew' + _by, newValue);
if (target['skew' + _otherBy] !== 0) {
newDim = target._getTransformedDimensions();
newValue = (_dim[otherBy] / newDim[otherBy]) * target['scale' + _otherBy];
target.set('scale' + _otherBy, newValue);
}
return skewed;
},
/**
* Scales object by invoking its scaleX/scaleY methods
* @private
* @param {Number} x pointer's x coordinate
* @param {Number} y pointer's y coordinate
* @param {String} by Either 'x' or 'y' - specifies dimension constraint by which to scale an object.
* When not provided, an object is scaled by both dimensions equally
* @return {Boolean} true if the scaling occurred
*/
_scaleObject: function (x, y, by) {
var t = this._currentTransform,
target = t.target,
lockScalingX = target.lockScalingX,
lockScalingY = target.lockScalingY,
lockScalingFlip = target.lockScalingFlip;
if (lockScalingX && lockScalingY) {
return false;
}
// Get the constraint point
var constraintPosition = target.translateToOriginPoint(target.getCenterPoint(), t.originX, t.originY),
localMouse = target.toLocalPoint(new fabric.Point(x, y), t.originX, t.originY),
dim = target._getTransformedDimensions(), scaled = false;
this._setLocalMouse(localMouse, t);
// Actually scale the object
scaled = this._setObjectScale(localMouse, t, lockScalingX, lockScalingY, by, lockScalingFlip, dim);
// Make sure the constraints apply
target.setPositionByOrigin(constraintPosition, t.originX, t.originY);
return scaled;
},
/**
* @private
* @return {Boolean} true if the scaling occurred
*/
_setObjectScale: function(localMouse, transform, lockScalingX, lockScalingY, by, lockScalingFlip, _dim) {
var target = transform.target, forbidScalingX = false, forbidScalingY = false, scaled = false,
scaleX = localMouse.x * target.scaleX / _dim.x,
scaleY = localMouse.y * target.scaleY / _dim.y,
changeX = target.scaleX !== scaleX,
changeY = target.scaleY !== scaleY;
transform.newScaleX = scaleX;
transform.newScaleY = scaleY;
if (by === 'x' && target instanceof fabric.Textbox) {
var w = target.width * (localMouse.x / _dim.x);
if (w >= target.getMinWidth()) {
scaled = w !== target.width;
target.set('width', w);
return scaled;
}
return false;
}
if (lockScalingFlip && scaleX <= 0 && scaleX < target.scaleX) {
forbidScalingX = true;
localMouse.x = 0;
}
if (lockScalingFlip && scaleY <= 0 && scaleY < target.scaleY) {
forbidScalingY = true;
localMouse.y = 0;
}
if (by === 'equally' && !lockScalingX && !lockScalingY) {
scaled = this._scaleObjectEqually(localMouse, target, transform, _dim);
}
else if (!by) {
forbidScalingX || lockScalingX || (target.set('scaleX', scaleX) && (scaled = scaled || changeX));
forbidScalingY || lockScalingY || (target.set('scaleY', scaleY) && (scaled = scaled || changeY));
}
else if (by === 'x' && !target.get('lockUniScaling')) {
forbidScalingX || lockScalingX || (target.set('scaleX', scaleX) && (scaled = changeX));
}
else if (by === 'y' && !target.get('lockUniScaling')) {
forbidScalingY || lockScalingY || (target.set('scaleY', scaleY) && (scaled = changeY));
}
forbidScalingX || forbidScalingY || this._flipObject(transform, by);
return scaled;
},
/**
* @private
* @return {Boolean} true if the scaling occurred
*/
_scaleObjectEqually: function(localMouse, target, transform, _dim) {
var dist = localMouse.y + localMouse.x,
lastDist = _dim.y * transform.original.scaleY / target.scaleY +
_dim.x * transform.original.scaleX / target.scaleX,
scaled, signX = localMouse.x < 0 ? -1 : 1,
signY = localMouse.y < 0 ? -1 : 1, newScaleX, newScaleY;
// We use transform.scaleX/Y instead of target.scaleX/Y
// because the object may have a min scale and we'll loose the proportions
newScaleX = signX * Math.abs(transform.original.scaleX * dist / lastDist);
newScaleY = signY * Math.abs(transform.original.scaleY * dist / lastDist);
scaled = newScaleX !== target.scaleX || newScaleY !== target.scaleY;
target.set('scaleX', newScaleX);
target.set('scaleY', newScaleY);
return scaled;
},
/**
* @private
*/
_flipObject: function(transform, by) {
if (transform.newScaleX < 0 && by !== 'y') {
if (transform.originX === 'left') {
transform.originX = 'right';
}
else if (transform.originX === 'right') {
transform.originX = 'left';
}
}
if (transform.newScaleY < 0 && by !== 'x') {
if (transform.originY === 'top') {
transform.originY = 'bottom';
}
else if (transform.originY === 'bottom') {
transform.originY = 'top';
}
}
},
/**
* @private
*/
_setLocalMouse: function(localMouse, t) {
var target = t.target, zoom = this.getZoom(),
padding = target.padding / zoom;
if (t.originX === 'right') {
localMouse.x *= -1;
}
else if (t.originX === 'center') {
localMouse.x *= t.mouseXSign * 2;
if (localMouse.x < 0) {
t.mouseXSign = -t.mouseXSign;
}
}
if (t.originY === 'bottom') {
localMouse.y *= -1;
}
else if (t.originY === 'center') {
localMouse.y *= t.mouseYSign * 2;
if (localMouse.y < 0) {
t.mouseYSign = -t.mouseYSign;
}
}
// adjust the mouse coordinates when dealing with padding
if (abs(localMouse.x) > padding) {
if (localMouse.x < 0) {
localMouse.x += padding;
}
else {
localMouse.x -= padding;
}
}
else { // mouse is within the padding, set to 0
localMouse.x = 0;
}
if (abs(localMouse.y) > padding) {
if (localMouse.y < 0) {
localMouse.y += padding;
}
else {
localMouse.y -= padding;
}
}
else {
localMouse.y = 0;
}
},
/**
* Rotates object by invoking its rotate method
* @private
* @param {Number} x pointer's x coordinate
* @param {Number} y pointer's y coordinate
* @return {Boolean} true if the rotation occurred
*/
_rotateObject: function (x, y) {
var t = this._currentTransform,
target = t.target, constraintPosition,
constraintPosition = target.translateToOriginPoint(target.getCenterPoint(), t.originX, t.originY);
if (target.lockRotation) {
return false;
}
var lastAngle = atan2(t.ey - constraintPosition.y, t.ex - constraintPosition.x),
curAngle = atan2(y - constraintPosition.y, x - constraintPosition.x),
angle = radiansToDegrees(curAngle - lastAngle + t.theta),
hasRotated = true;
if (target.snapAngle > 0) {
var snapAngle = target.snapAngle,
snapThreshold = target.snapThreshold || snapAngle,
rightAngleLocked = Math.ceil(angle / snapAngle) * snapAngle,
leftAngleLocked = Math.floor(angle / snapAngle) * snapAngle;
if (Math.abs(angle - leftAngleLocked) < snapThreshold) {
angle = leftAngleLocked;
}
else if (Math.abs(angle - rightAngleLocked) < snapThreshold) {
angle = rightAngleLocked;
}
}
// normalize angle to positive value
if (angle < 0) {
angle = 360 + angle;
}
angle %= 360;
if (target.angle === angle) {
hasRotated = false;
}
else {
// rotation only happen here
target.angle = angle;
// Make sure the constraints apply
target.setPositionByOrigin(constraintPosition, t.originX, t.originY);
}
return hasRotated;
},
/**
* Set the cursor type of the canvas element
* @param {String} value Cursor type of the canvas element.
* @see http://www.w3.org/TR/css3-ui/#cursor
*/
setCursor: function (value) {
this.upperCanvasEl.style.cursor = value;
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx to draw the selection on
*/
_drawSelection: function (ctx) {
var groupSelector = this._groupSelector,
left = groupSelector.left,
top = groupSelector.top,
aleft = abs(left),
atop = abs(top);
if (this.selectionColor) {
ctx.fillStyle = this.selectionColor;
ctx.fillRect(
groupSelector.ex - ((left > 0) ? 0 : -left),
groupSelector.ey - ((top > 0) ? 0 : -top),
aleft,
atop
);
}
if (!this.selectionLineWidth || !this.selectionBorderColor) {
return;
}
ctx.lineWidth = this.selectionLineWidth;
ctx.strokeStyle = this.selectionBorderColor;
// selection border
if (this.selectionDashArray.length > 1 && !supportLineDash) {
var px = groupSelector.ex + STROKE_OFFSET - ((left > 0) ? 0 : aleft),
py = groupSelector.ey + STROKE_OFFSET - ((top > 0) ? 0 : atop);
ctx.beginPath();
fabric.util.drawDashedLine(ctx, px, py, px + aleft, py, this.selectionDashArray);
fabric.util.drawDashedLine(ctx, px, py + atop - 1, px + aleft, py + atop - 1, this.selectionDashArray);
fabric.util.drawDashedLine(ctx, px, py, px, py + atop, this.selectionDashArray);
fabric.util.drawDashedLine(ctx, px + aleft - 1, py, px + aleft - 1, py + atop, this.selectionDashArray);
ctx.closePath();
ctx.stroke();
}
else {
fabric.Object.prototype._setLineDash.call(this, ctx, this.selectionDashArray);
ctx.strokeRect(
groupSelector.ex + STROKE_OFFSET - ((left > 0) ? 0 : aleft),
groupSelector.ey + STROKE_OFFSET - ((top > 0) ? 0 : atop),
aleft,
atop
);
}
},
/**
* Method that determines what object we are clicking on
* the skipGroup parameter is for internal use, is needed for shift+click action
* 11/09/2018 TODO: would be cool if findTarget could discern between being a full target
* or the outside part of the corner.
* @param {Event} e mouse event
* @param {Boolean} skipGroup when true, activeGroup is skipped and only objects are traversed through
* @return {fabric.Object} the target found
*/
findTarget: function (e, skipGroup) {
if (this.skipTargetFind) {
return;
}
var ignoreZoom = true,
pointer = this.getPointer(e, ignoreZoom),
activeObject = this._activeObject,
aObjects = this.getActiveObjects(),
activeTarget, activeTargetSubs;
// first check current group (if one exists)
// active group does not check sub targets like normal groups.
// if active group just exits.
this.targets = [];
if (aObjects.length > 1 && !skipGroup && activeObject === this._searchPossibleTargets([activeObject], pointer)) {
return activeObject;
}
// if we hit the corner of an activeObject, let's return that.
if (aObjects.length === 1 && activeObject._findTargetCorner(pointer)) {
return activeObject;
}
if (aObjects.length === 1 &&
activeObject === this._searchPossibleTargets([activeObject], pointer)) {
if (!this.preserveObjectStacking) {
return activeObject;
}
else {
activeTarget = activeObject;
activeTargetSubs = this.targets;
this.targets = [];
}
}
var target = this._searchPossibleTargets(this._objects, pointer);
if (e[this.altSelectionKey] && target && activeTarget && target !== activeTarget) {
target = activeTarget;
this.targets = activeTargetSubs;
}
return target;
},
/**
* Checks point is inside the object.
* @param {Object} [pointer] x,y object of point coordinates we want to check.
* @param {fabric.Object} obj Object to test against
* @param {Object} [globalPointer] x,y object of point coordinates relative to canvas used to search per pixel target.
* @return {Boolean} true if point is contained within an area of given object
* @private
*/
_checkTarget: function(pointer, obj, globalPointer) {
if (obj &&
obj.visible &&
obj.evented &&
this.containsPoint(null, obj, pointer)){
if ((this.perPixelTargetFind || obj.perPixelTargetFind) && !obj.isEditing) {
var isTransparent = this.isTargetTransparent(obj, globalPointer.x, globalPointer.y);
if (!isTransparent) {
return true;
}
}
else {
return true;
}
}
},
/**
* Function used to search inside objects an object that contains pointer in bounding box or that contains pointerOnCanvas when painted
* @param {Array} [objects] objects array to look into
* @param {Object} [pointer] x,y object of point coordinates we want to check.
* @return {fabric.Object} object that contains pointer
* @private
*/
_searchPossibleTargets: function(objects, pointer) {
// Cache all targets where their bounding box contains point.
var target, i = objects.length, subTarget;
// Do not check for currently grouped objects, since we check the parent group itself.
// until we call this function specifically to search inside the activeGroup
while (i--) {
var objToCheck = objects[i];
var pointerToUse = objToCheck.group && objToCheck.group.type !== 'activeSelection' ?
this._normalizePointer(objToCheck.group, pointer) : pointer;
if (this._checkTarget(pointerToUse, objToCheck, pointer)) {
target = objects[i];
if (target.subTargetCheck && target instanceof fabric.Group) {
subTarget = this._searchPossibleTargets(target._objects, pointer);
subTarget && this.targets.push(subTarget);
}
break;
}
}
return target;
},
/**
* Returns pointer coordinates without the effect of the viewport
* @param {Object} pointer with "x" and "y" number values
* @return {Object} object with "x" and "y" number values
*/
restorePointerVpt: function(pointer) {
return fabric.util.transformPoint(
pointer,
fabric.util.invertTransform(this.viewportTransform)
);
},
/**
* Returns pointer coordinates relative to canvas.
* Can return coordinates with or without viewportTransform.
* ignoreZoom false gives back coordinates that represent
* the point clicked on canvas element.
* ignoreZoom true gives back coordinates after being processed
* by the viewportTransform ( sort of coordinates of what is displayed
* on the canvas where you are clicking.
* ignoreZoom true = HTMLElement coordinates relative to top,left
* ignoreZoom false, default = fabric space coordinates, the same used for shape position
* To interact with your shapes top and left you want to use ignoreZoom true
* most of the time, while ignoreZoom false will give you coordinates
* compatible with the object.oCoords system.
* of the time.
* @param {Event} e
* @param {Boolean} ignoreZoom
* @return {Object} object with "x" and "y" number values
*/
getPointer: function (e, ignoreZoom) {
// return cached values if we are in the event processing chain
if (this._absolutePointer && !ignoreZoom) {
return this._absolutePointer;
}
if (this._pointer && ignoreZoom) {
return this._pointer;
}
var pointer = getPointer(e),
upperCanvasEl = this.upperCanvasEl,
bounds = upperCanvasEl.getBoundingClientRect(),
boundsWidth = bounds.width || 0,
boundsHeight = bounds.height || 0,
cssScale;
if (!boundsWidth || !boundsHeight ) {
if ('top' in bounds && 'bottom' in bounds) {
boundsHeight = Math.abs( bounds.top - bounds.bottom );
}
if ('right' in bounds && 'left' in bounds) {
boundsWidth = Math.abs( bounds.right - bounds.left );
}
}
this.calcOffset();
pointer.x = pointer.x - this._offset.left;
pointer.y = pointer.y - this._offset.top;
if (!ignoreZoom) {
pointer = this.restorePointerVpt(pointer);
}
if (boundsWidth === 0 || boundsHeight === 0) {
// If bounds are not available (i.e. not visible), do not apply scale.
cssScale = { width: 1, height: 1 };
}
else {
cssScale = {
width: upperCanvasEl.width / boundsWidth,
height: upperCanvasEl.height / boundsHeight
};
}
return {
x: pointer.x * cssScale.width,
y: pointer.y * cssScale.height
};
},
/**
* @private
* @throws {CANVAS_INIT_ERROR} If canvas can not be initialized
*/
_createUpperCanvas: function () {
var lowerCanvasClass = this.lowerCanvasEl.className.replace(/\s*lower-canvas\s*/, '');
// there is no need to create a new upperCanvas element if we have already one.
if (this.upperCanvasEl) {
this.upperCanvasEl.className = '';
}
else {
this.upperCanvasEl = this._createCanvasElement();
}
fabric.util.addClass(this.upperCanvasEl, 'upper-canvas ' + lowerCanvasClass);
this.wrapperEl.appendChild(this.upperCanvasEl);
this._copyCanvasStyle(this.lowerCanvasEl, this.upperCanvasEl);
this._applyCanvasStyle(this.upperCanvasEl);
this.contextTop = this.upperCanvasEl.getContext('2d');
},
/**
* @private
*/
_createCacheCanvas: function () {
this.cacheCanvasEl = this._createCanvasElement();
this.cacheCanvasEl.setAttribute('width', this.width);
this.cacheCanvasEl.setAttribute('height', this.height);
this.contextCache = this.cacheCanvasEl.getContext('2d');
},
/**
* @private
*/
_initWrapperElement: function () {
this.wrapperEl = fabric.util.wrapElement(this.lowerCanvasEl, 'div', {
'class': this.containerClass
});
fabric.util.setStyle(this.wrapperEl, {
width: this.width + 'px',
height: this.height + 'px',
position: 'relative'
});
fabric.util.makeElementUnselectable(this.wrapperEl);
},
/**
* @private
* @param {HTMLElement} element canvas element to apply styles on
*/
_applyCanvasStyle: function (element) {
var width = this.width || element.width,
height = this.height || element.height;
fabric.util.setStyle(element, {
position: 'absolute',
width: width + 'px',
height: height + 'px',
left: 0,
top: 0,
'touch-action': this.allowTouchScrolling ? 'manipulation' : 'none',
'-ms-touch-action': this.allowTouchScrolling ? 'manipulation' : 'none'
});
element.width = width;
element.height = height;
fabric.util.makeElementUnselectable(element);
},
/**
* Copy the entire inline style from one element (fromEl) to another (toEl)
* @private
* @param {Element} fromEl Element style is copied from
* @param {Element} toEl Element copied style is applied to
*/
_copyCanvasStyle: function (fromEl, toEl) {
toEl.style.cssText = fromEl.style.cssText;
},
/**
* Returns context of canvas where object selection is drawn
* @return {CanvasRenderingContext2D}
*/
getSelectionContext: function() {
return this.contextTop;
},
/**
* Returns &lt;canvas> element on which object selection is drawn
* @return {HTMLCanvasElement}
*/
getSelectionElement: function () {
return this.upperCanvasEl;
},
/**
* Returns currently active object
* @return {fabric.Object} active object
*/
getActiveObject: function () {
return this._activeObject;
},
/**
* Returns an array with the current selected objects
* @return {fabric.Object} active object
*/
getActiveObjects: function () {
var active = this._activeObject;
if (active) {
if (active.type === 'activeSelection' && active._objects) {
return active._objects.slice(0);
}
else {
return [active];
}
}
return [];
},
/**
* @private
* @param {fabric.Object} obj Object that was removed
*/
_onObjectRemoved: function(obj) {
// removing active object should fire "selection:cleared" events
if (obj === this._activeObject) {
this.fire('before:selection:cleared', { target: obj });
this._discardActiveObject();
this.fire('selection:cleared', { target: obj });
obj.fire('deselected');
}
if (this._hoveredTarget === obj) {
this._hoveredTarget = null;
}
this.callSuper('_onObjectRemoved', obj);
},
/**
* @private
* Compares the old activeObject with the current one and fires correct events
* @param {fabric.Object} obj old activeObject
*/
_fireSelectionEvents: function(oldObjects, e) {
var somethingChanged = false, objects = this.getActiveObjects(),
added = [], removed = [], opt = { e: e };
oldObjects.forEach(function(oldObject) {
if (objects.indexOf(oldObject) === -1) {
somethingChanged = true;
oldObject.fire('deselected', opt);
removed.push(oldObject);
}
});
objects.forEach(function(object) {
if (oldObjects.indexOf(object) === -1) {
somethingChanged = true;
object.fire('selected', opt);
added.push(object);
}
});
if (oldObjects.length > 0 && objects.length > 0) {
opt.selected = added;
opt.deselected = removed;
// added for backward compatibility
opt.updated = added[0] || removed[0];
opt.target = this._activeObject;
somethingChanged && this.fire('selection:updated', opt);
}
else if (objects.length > 0) {
// deprecated event
if (objects.length === 1) {
opt.target = added[0];
this.fire('object:selected', opt);
}
opt.selected = added;
// added for backward compatibility
opt.target = this._activeObject;
this.fire('selection:created', opt);
}
else if (oldObjects.length > 0) {
opt.deselected = removed;
this.fire('selection:cleared', opt);
}
},
/**
* Sets given object as the only active object on canvas
* @param {fabric.Object} object Object to set as an active one
* @param {Event} [e] Event (passed along when firing "object:selected")
* @return {fabric.Canvas} thisArg
* @chainable
*/
setActiveObject: function (object, e) {
var currentActives = this.getActiveObjects();
this._setActiveObject(object, e);
this._fireSelectionEvents(currentActives, e);
return this;
},
/**
* @private
* @param {Object} object to set as active
* @param {Event} [e] Event (passed along when firing "object:selected")
* @return {Boolean} true if the selection happened
*/
_setActiveObject: function(object, e) {
if (this._activeObject === object) {
return false;
}
if (!this._discardActiveObject(e, object)) {
return false;
}
if (object.onSelect({ e: e })) {
return false;
}
this._activeObject = object;
return true;
},
/**
* @private
*/
_discardActiveObject: function(e, object) {
var obj = this._activeObject;
if (obj) {
// onDeselect return TRUE to cancel selection;
if (obj.onDeselect({ e: e, object: object })) {
return false;
}
this._activeObject = null;
}
return true;
},
/**
* Discards currently active object and fire events. If the function is called by fabric
* as a consequence of a mouse event, the event is passed as a parameter and
* sent to the fire function for the custom events. When used as a method the
* e param does not have any application.
* @param {event} e
* @return {fabric.Canvas} thisArg
* @chainable
*/
discardActiveObject: function (e) {
var currentActives = this.getActiveObjects(), activeObject = this.getActiveObject();
if (currentActives.length) {
this.fire('before:selection:cleared', { target: activeObject, e: e });
}
this._discardActiveObject(e);
this._fireSelectionEvents(currentActives, e);
return this;
},
/**
* Clears a canvas element and removes all event listeners
* @return {fabric.Canvas} thisArg
* @chainable
*/
dispose: function () {
var wrapper = this.wrapperEl;
this.removeListeners();
wrapper.removeChild(this.upperCanvasEl);
wrapper.removeChild(this.lowerCanvasEl);
this.contextCache = null;
this.contextTop = null;
['upperCanvasEl', 'cacheCanvasEl'].forEach((function(element) {
fabric.util.cleanUpJsdomNode(this[element]);
this[element] = undefined;
}).bind(this));
if (wrapper.parentNode) {
wrapper.parentNode.replaceChild(this.lowerCanvasEl, this.wrapperEl);
}
delete this.wrapperEl;
fabric.StaticCanvas.prototype.dispose.call(this);
return this;
},
/**
* Clears all contexts (background, main, top) of an instance
* @return {fabric.Canvas} thisArg
* @chainable
*/
clear: function () {
// this.discardActiveGroup();
this.discardActiveObject();
this.clearContext(this.contextTop);
return this.callSuper('clear');
},
/**
* Draws objects' controls (borders/controls)
* @param {CanvasRenderingContext2D} ctx Context to render controls on
*/
drawControls: function(ctx) {
var activeObject = this._activeObject;
if (activeObject) {
activeObject._renderControls(ctx);
}
},
/**
* @private
*/
_toObject: function(instance, methodName, propertiesToInclude) {
//If the object is part of the current selection group, it should
//be transformed appropriately
//i.e. it should be serialised as it would appear if the selection group
//were to be destroyed.
var originalProperties = this._realizeGroupTransformOnObject(instance),
object = this.callSuper('_toObject', instance, methodName, propertiesToInclude);
//Undo the damage we did by changing all of its properties
this._unwindGroupTransformOnObject(instance, originalProperties);
return object;
},
/**
* Realises an object's group transformation on it
* @private
* @param {fabric.Object} [instance] the object to transform (gets mutated)
* @returns the original values of instance which were changed
*/
_realizeGroupTransformOnObject: function(instance) {
if (instance.group && instance.group.type === 'activeSelection' && this._activeObject === instance.group) {
var layoutProps = ['angle', 'flipX', 'flipY', 'left', 'scaleX', 'scaleY', 'skewX', 'skewY', 'top'];
//Copy all the positionally relevant properties across now
var originalValues = {};
layoutProps.forEach(function(prop) {
originalValues[prop] = instance[prop];
});
this._activeObject.realizeTransform(instance);
return originalValues;
}
else {
return null;
}
},
/**
* Restores the changed properties of instance
* @private
* @param {fabric.Object} [instance] the object to un-transform (gets mutated)
* @param {Object} [originalValues] the original values of instance, as returned by _realizeGroupTransformOnObject
*/
_unwindGroupTransformOnObject: function(instance, originalValues) {
if (originalValues) {
instance.set(originalValues);
}
},
/**
* @private
*/
_setSVGObject: function(markup, instance, reviver) {
//If the object is in a selection group, simulate what would happen to that
//object when the group is deselected
var originalProperties = this._realizeGroupTransformOnObject(instance);
this.callSuper('_setSVGObject', markup, instance, reviver);
this._unwindGroupTransformOnObject(instance, originalProperties);
},
setViewportTransform: function (vpt) {
if (this.renderOnAddRemove && this._activeObject && this._activeObject.isEditing) {
this._activeObject.clearContextTop();
}
fabric.StaticCanvas.prototype.setViewportTransform.call(this, vpt);
}
});
// copying static properties manually to work around Opera's bug,
// where "prototype" property is enumerable and overrides existing prototype
for (var prop in fabric.StaticCanvas) {
if (prop !== 'prototype') {
fabric.Canvas[prop] = fabric.StaticCanvas[prop];
}
}
})();
(function() {
var cursorOffset = {
mt: 0, // n
tr: 1, // ne
mr: 2, // e
br: 3, // se
mb: 4, // s
bl: 5, // sw
ml: 6, // w
tl: 7 // nw
},
addListener = fabric.util.addListener,
removeListener = fabric.util.removeListener,
RIGHT_CLICK = 3, MIDDLE_CLICK = 2, LEFT_CLICK = 1,
addEventOptions = { passive: false };
function checkClick(e, value) {
return e.button && (e.button === value - 1);
}
fabric.util.object.extend(fabric.Canvas.prototype, /** @lends fabric.Canvas.prototype */ {
/**
* Map of cursor style values for each of the object controls
* @private
*/
cursorMap: [
'n-resize',
'ne-resize',
'e-resize',
'se-resize',
's-resize',
'sw-resize',
'w-resize',
'nw-resize'
],
/**
* Contains the id of the touch event that owns the fabric transform
* @type Number
* @private
*/
mainTouchId: null,
/**
* Adds mouse listeners to canvas
* @private
*/
_initEventListeners: function () {
// in case we initialized the class twice. This should not happen normally
// but in some kind of applications where the canvas element may be changed
// this is a workaround to having double listeners.
this.removeListeners();
this._bindEvents();
this.addOrRemove(addListener, 'add');
},
/**
* return an event prefix pointer or mouse.
* @private
*/
_getEventPrefix: function () {
return this.enablePointerEvents ? 'pointer' : 'mouse';
},
addOrRemove: function(functor, eventjsFunctor) {
var canvasElement = this.upperCanvasEl,
eventTypePrefix = this._getEventPrefix();
functor(fabric.window, 'resize', this._onResize);
functor(canvasElement, eventTypePrefix + 'down', this._onMouseDown);
functor(canvasElement, eventTypePrefix + 'move', this._onMouseMove, addEventOptions);
functor(canvasElement, eventTypePrefix + 'out', this._onMouseOut);
functor(canvasElement, eventTypePrefix + 'enter', this._onMouseEnter);
functor(canvasElement, 'wheel', this._onMouseWheel);
functor(canvasElement, 'contextmenu', this._onContextMenu);
functor(canvasElement, 'dblclick', this._onDoubleClick);
functor(canvasElement, 'dragover', this._onDragOver);
functor(canvasElement, 'dragenter', this._onDragEnter);
functor(canvasElement, 'dragleave', this._onDragLeave);
functor(canvasElement, 'drop', this._onDrop);
if (!this.enablePointerEvents) {
functor(canvasElement, 'touchstart', this._onTouchStart, addEventOptions);
}
if (typeof eventjs !== 'undefined' && eventjsFunctor in eventjs) {
eventjs[eventjsFunctor](canvasElement, 'gesture', this._onGesture);
eventjs[eventjsFunctor](canvasElement, 'drag', this._onDrag);
eventjs[eventjsFunctor](canvasElement, 'orientation', this._onOrientationChange);
eventjs[eventjsFunctor](canvasElement, 'shake', this._onShake);
eventjs[eventjsFunctor](canvasElement, 'longpress', this._onLongPress);
}
},
/**
* Removes all event listeners
*/
removeListeners: function() {
this.addOrRemove(removeListener, 'remove');
// if you dispose on a mouseDown, before mouse up, you need to clean document to...
var eventTypePrefix = this._getEventPrefix();
removeListener(fabric.document, eventTypePrefix + 'up', this._onMouseUp);
removeListener(fabric.document, 'touchend', this._onTouchEnd, addEventOptions);
removeListener(fabric.document, eventTypePrefix + 'move', this._onMouseMove, addEventOptions);
removeListener(fabric.document, 'touchmove', this._onMouseMove, addEventOptions);
},
/**
* @private
*/
_bindEvents: function() {
if (this.eventsBound) {
// for any reason we pass here twice we do not want to bind events twice.
return;
}
this._onMouseDown = this._onMouseDown.bind(this);
this._onTouchStart = this._onTouchStart.bind(this);
this._onMouseMove = this._onMouseMove.bind(this);
this._onMouseUp = this._onMouseUp.bind(this);
this._onTouchEnd = this._onTouchEnd.bind(this);
this._onResize = this._onResize.bind(this);
this._onGesture = this._onGesture.bind(this);
this._onDrag = this._onDrag.bind(this);
this._onShake = this._onShake.bind(this);
this._onLongPress = this._onLongPress.bind(this);
this._onOrientationChange = this._onOrientationChange.bind(this);
this._onMouseWheel = this._onMouseWheel.bind(this);
this._onMouseOut = this._onMouseOut.bind(this);
this._onMouseEnter = this._onMouseEnter.bind(this);
this._onContextMenu = this._onContextMenu.bind(this);
this._onDoubleClick = this._onDoubleClick.bind(this);
this._onDragOver = this._onDragOver.bind(this);
this._onDragEnter = this._simpleEventHandler.bind(this, 'dragenter');
this._onDragLeave = this._simpleEventHandler.bind(this, 'dragleave');
this._onDrop = this._simpleEventHandler.bind(this, 'drop');
this.eventsBound = true;
},
/**
* @private
* @param {Event} [e] Event object fired on Event.js gesture
* @param {Event} [self] Inner Event object
*/
_onGesture: function(e, self) {
this.__onTransformGesture && this.__onTransformGesture(e, self);
},
/**
* @private
* @param {Event} [e] Event object fired on Event.js drag
* @param {Event} [self] Inner Event object
*/
_onDrag: function(e, self) {
this.__onDrag && this.__onDrag(e, self);
},
/**
* @private
* @param {Event} [e] Event object fired on wheel event
*/
_onMouseWheel: function(e) {
this.__onMouseWheel(e);
},
/**
* @private
* @param {Event} e Event object fired on mousedown
*/
_onMouseOut: function(e) {
var target = this._hoveredTarget;
this.fire('mouse:out', { target: target, e: e });
this._hoveredTarget = null;
target && target.fire('mouseout', { e: e });
if (this._iTextInstances) {
this._iTextInstances.forEach(function(obj) {
if (obj.isEditing) {
obj.hiddenTextarea.focus();
}
});
}
},
/**
* @private
* @param {Event} e Event object fired on mouseenter
*/
_onMouseEnter: function(e) {
// This find target and consequent 'mouse:over' is used to
// clear old instances on hovered target.
// calling findTarget has the side effect of killing target.__corner.
// as a short term fix we are not firing this if we are currently transforming.
// as a long term fix we need to separate the action of finding a target with the
// side effects we added to it.
if (!this.currentTransform && !this.findTarget(e)) {
this.fire('mouse:over', { target: null, e: e });
this._hoveredTarget = null;
}
},
/**
* @private
* @param {Event} [e] Event object fired on Event.js orientation change
* @param {Event} [self] Inner Event object
*/
_onOrientationChange: function(e, self) {
this.__onOrientationChange && this.__onOrientationChange(e, self);
},
/**
* @private
* @param {Event} [e] Event object fired on Event.js shake
* @param {Event} [self] Inner Event object
*/
_onShake: function(e, self) {
this.__onShake && this.__onShake(e, self);
},
/**
* @private
* @param {Event} [e] Event object fired on Event.js shake
* @param {Event} [self] Inner Event object
*/
_onLongPress: function(e, self) {
this.__onLongPress && this.__onLongPress(e, self);
},
/**
* prevent default to allow drop event to be fired
* @private
* @param {Event} [e] Event object fired on Event.js shake
*/
_onDragOver: function(e) {
e.preventDefault();
var target = this._simpleEventHandler('dragover', e);
this._fireEnterLeaveEvents(target, e);
},
/**
* @private
* @param {Event} e Event object fired on mousedown
*/
_onContextMenu: function (e) {
if (this.stopContextMenu) {
e.stopPropagation();
e.preventDefault();
}
return false;
},
/**
* @private
* @param {Event} e Event object fired on mousedown
*/
_onDoubleClick: function (e) {
this._cacheTransformEventData(e);
this._handleEvent(e, 'dblclick');
this._resetTransformEventData(e);
},
/**
* Return a the id of an event.
* returns either the pointerId or the identifier or 0 for the mouse event
* @private
* @param {Event} evt Event object
*/
getPointerId: function(evt) {
var changedTouches = evt.changedTouches;
if (changedTouches) {
return changedTouches[0] && changedTouches[0].identifier;
}
if (this.enablePointerEvents) {
return evt.pointerId;
}
return -1;
},
/**
* Determines if an event has the id of the event that is considered main
* @private
* @param {evt} event Event object
*/
_isMainEvent: function(evt) {
if (evt.isPrimary === true) {
return true;
}
if (evt.isPrimary === false) {
return false;
}
if (evt.type === 'touchend' && evt.touches.length === 0) {
return true;
}
if (evt.changedTouches) {
return evt.changedTouches[0].identifier === this.mainTouchId;
}
return true;
},
/**
* @private
* @param {Event} e Event object fired on mousedown
*/
_onTouchStart: function(e) {
e.preventDefault();
if (this.mainTouchId === null) {
this.mainTouchId = this.getPointerId(e);
}
this.__onMouseDown(e);
this._resetTransformEventData();
var canvasElement = this.upperCanvasEl,
eventTypePrefix = this._getEventPrefix();
addListener(fabric.document, 'touchend', this._onTouchEnd, addEventOptions);
addListener(fabric.document, 'touchmove', this._onMouseMove, addEventOptions);
// Unbind mousedown to prevent double triggers from touch devices
removeListener(canvasElement, eventTypePrefix + 'down', this._onMouseDown);
},
/**
* @private
* @param {Event} e Event object fired on mousedown
*/
_onMouseDown: function (e) {
this.__onMouseDown(e);
this._resetTransformEventData();
var canvasElement = this.upperCanvasEl,
eventTypePrefix = this._getEventPrefix();
removeListener(canvasElement, eventTypePrefix + 'move', this._onMouseMove, addEventOptions);
addListener(fabric.document, eventTypePrefix + 'up', this._onMouseUp);
addListener(fabric.document, eventTypePrefix + 'move', this._onMouseMove, addEventOptions);
},
/**
* @private
* @param {Event} e Event object fired on mousedown
*/
_onTouchEnd: function(e) {
if (e.touches.length > 0) {
// if there are still touches stop here
return;
}
this.__onMouseUp(e);
this._resetTransformEventData();
this.mainTouchId = null;
var eventTypePrefix = this._getEventPrefix();
removeListener(fabric.document, 'touchend', this._onTouchEnd, addEventOptions);
removeListener(fabric.document, 'touchmove', this._onMouseMove, addEventOptions);
var _this = this;
if (this._willAddMouseDown) {
clearTimeout(this._willAddMouseDown);
}
this._willAddMouseDown = setTimeout(function() {
// Wait 400ms before rebinding mousedown to prevent double triggers
// from touch devices
addListener(_this.upperCanvasEl, eventTypePrefix + 'down', _this._onMouseDown);
_this._willAddMouseDown = 0;
}, 400);
},
/**
* @private
* @param {Event} e Event object fired on mouseup
*/
_onMouseUp: function (e) {
this.__onMouseUp(e);
this._resetTransformEventData();
var canvasElement = this.upperCanvasEl,
eventTypePrefix = this._getEventPrefix();
if (this._isMainEvent(e)) {
removeListener(fabric.document, eventTypePrefix + 'up', this._onMouseUp);
removeListener(fabric.document, eventTypePrefix + 'move', this._onMouseMove, addEventOptions);
addListener(canvasElement, eventTypePrefix + 'move', this._onMouseMove, addEventOptions);
}
},
/**
* @private
* @param {Event} e Event object fired on mousemove
*/
_onMouseMove: function (e) {
!this.allowTouchScrolling && e.preventDefault && e.preventDefault();
this.__onMouseMove(e);
},
/**
* @private
*/
_onResize: function () {
this.calcOffset();
},
/**
* Decides whether the canvas should be redrawn in mouseup and mousedown events.
* @private
* @param {Object} target
*/
_shouldRender: function(target) {
var activeObject = this._activeObject;
if (
!!activeObject !== !!target ||
(activeObject && target && (activeObject !== target))
) {
// this covers: switch of target, from target to no target, selection of target
// multiSelection with key and mouse
return true;
}
else if (activeObject && activeObject.isEditing) {
// if we mouse up/down over a editing textbox a cursor change,
// there is no need to re render
return false;
}
return false;
},
/**
* Method that defines the actions when mouse is released on canvas.
* The method resets the currentTransform parameters, store the image corner
* position in the image object and render the canvas on top.
* @private
* @param {Event} e Event object fired on mouseup
*/
__onMouseUp: function (e) {
var target, transform = this._currentTransform,
groupSelector = this._groupSelector, shouldRender = false,
isClick = (!groupSelector || (groupSelector.left === 0 && groupSelector.top === 0));
this._cacheTransformEventData(e);
target = this._target;
this._handleEvent(e, 'up:before');
// if right/middle click just fire events and return
// target undefined will make the _handleEvent search the target
if (checkClick(e, RIGHT_CLICK)) {
if (this.fireRightClick) {
this._handleEvent(e, 'up', RIGHT_CLICK, isClick);
}
return;
}
if (checkClick(e, MIDDLE_CLICK)) {
if (this.fireMiddleClick) {
this._handleEvent(e, 'up', MIDDLE_CLICK, isClick);
}
this._resetTransformEventData();
return;
}
if (this.isDrawingMode && this._isCurrentlyDrawing) {
this._onMouseUpInDrawingMode(e);
return;
}
if (!this._isMainEvent(e)) {
return;
}
if (transform) {
this._finalizeCurrentTransform(e);
shouldRender = transform.actionPerformed;
}
if (!isClick) {
this._maybeGroupObjects(e);
shouldRender || (shouldRender = this._shouldRender(target));
}
if (target) {
target.isMoving = false;
}
this._setCursorFromEvent(e, target);
this._handleEvent(e, 'up', LEFT_CLICK, isClick);
this._groupSelector = null;
this._currentTransform = null;
// reset the target information about which corner is selected
target && (target.__corner = 0);
if (shouldRender) {
this.requestRenderAll();
}
else if (!isClick) {
this.renderTop();
}
},
/**
* @private
* Handle event firing for target and subtargets
* @param {Event} e event from mouse
* @param {String} eventType event to fire (up, down or move)
* @return {Fabric.Object} target return the the target found, for internal reasons.
*/
_simpleEventHandler: function(eventType, e) {
var target = this.findTarget(e),
targets = this.targets,
options = {
e: e,
target: target,
subTargets: targets,
};
this.fire(eventType, options);
target && target.fire(eventType, options);
if (!targets) {
return target;
}
for (var i = 0; i < targets.length; i++) {
targets[i].fire(eventType, options);
}
return target;
},
/**
* @private
* Handle event firing for target and subtargets
* @param {Event} e event from mouse
* @param {String} eventType event to fire (up, down or move)
* @param {fabric.Object} targetObj receiving event
* @param {Number} [button] button used in the event 1 = left, 2 = middle, 3 = right
* @param {Boolean} isClick for left button only, indicates that the mouse up happened without move.
*/
_handleEvent: function(e, eventType, button, isClick) {
var target = this._target,
targets = this.targets || [],
options = {
e: e,
target: target,
subTargets: targets,
button: button || LEFT_CLICK,
isClick: isClick || false,
pointer: this._pointer,
absolutePointer: this._absolutePointer,
transform: this._currentTransform
};
this.fire('mouse:' + eventType, options);
target && target.fire('mouse' + eventType, options);
for (var i = 0; i < targets.length; i++) {
targets[i].fire('mouse' + eventType, options);
}
},
/**
* @private
* @param {Event} e send the mouse event that generate the finalize down, so it can be used in the event
*/
_finalizeCurrentTransform: function(e) {
var transform = this._currentTransform,
target = transform.target,
eventName,
options = {
e: e,
target: target,
transform: transform,
};
if (target._scaling) {
target._scaling = false;
}
target.setCoords();
if (transform.actionPerformed || (this.stateful && target.hasStateChanged())) {
if (transform.actionPerformed) {
eventName = this._addEventOptions(options, transform);
this._fire(eventName, options);
}
this._fire('modified', options);
}
},
/**
* Mutate option object in order to add by property and give back the event name.
* @private
* @param {Object} options to mutate
* @param {Object} transform to inspect action from
*/
_addEventOptions: function(options, transform) {
// we can probably add more details at low cost
// scale change, rotation changes, translation changes
var eventName, by;
switch (transform.action) {
case 'scaleX':
eventName = 'scaled';
by = 'x';
break;
case 'scaleY':
eventName = 'scaled';
by = 'y';
break;
case 'skewX':
eventName = 'skewed';
by = 'x';
break;
case 'skewY':
eventName = 'skewed';
by = 'y';
break;
case 'scale':
eventName = 'scaled';
by = 'equally';
break;
case 'rotate':
eventName = 'rotated';
break;
case 'drag':
eventName = 'moved';
break;
}
options.by = by;
return eventName;
},
/**
* @private
* @param {Event} e Event object fired on mousedown
*/
_onMouseDownInDrawingMode: function(e) {
this._isCurrentlyDrawing = true;
if (this.getActiveObject()) {
this.discardActiveObject(e).requestRenderAll();
}
if (this.clipTo) {
fabric.util.clipContext(this, this.contextTop);
}
var pointer = this.getPointer(e);
this.freeDrawingBrush.onMouseDown(pointer, { e: e, pointer: pointer });
this._handleEvent(e, 'down');
},
/**
* @private
* @param {Event} e Event object fired on mousemove
*/
_onMouseMoveInDrawingMode: function(e) {
if (this._isCurrentlyDrawing) {
var pointer = this.getPointer(e);
this.freeDrawingBrush.onMouseMove(pointer, { e: e, pointer: pointer });
}
this.setCursor(this.freeDrawingCursor);
this._handleEvent(e, 'move');
},
/**
* @private
* @param {Event} e Event object fired on mouseup
*/
_onMouseUpInDrawingMode: function(e) {
if (this.clipTo) {
this.contextTop.restore();
}
var pointer = this.getPointer(e);
this._isCurrentlyDrawing = this.freeDrawingBrush.onMouseUp({ e: e, pointer: pointer });
this._handleEvent(e, 'up');
},
/**
* Method that defines the actions when mouse is clicked on canvas.
* The method inits the currentTransform parameters and renders all the
* canvas so the current image can be placed on the top canvas and the rest
* in on the container one.
* @private
* @param {Event} e Event object fired on mousedown
*/
__onMouseDown: function (e) {
this._cacheTransformEventData(e);
this._handleEvent(e, 'down:before');
var target = this._target;
// if right click just fire events
if (checkClick(e, RIGHT_CLICK)) {
if (this.fireRightClick) {
this._handleEvent(e, 'down', RIGHT_CLICK);
}
return;
}
if (checkClick(e, MIDDLE_CLICK)) {
if (this.fireMiddleClick) {
this._handleEvent(e, 'down', MIDDLE_CLICK);
}
return;
}
if (this.isDrawingMode) {
this._onMouseDownInDrawingMode(e);
return;
}
if (!this._isMainEvent(e)) {
return;
}
// ignore if some object is being transformed at this moment
if (this._currentTransform) {
return;
}
var pointer = this._pointer;
// save pointer for check in __onMouseUp event
this._previousPointer = pointer;
var shouldRender = this._shouldRender(target),
shouldGroup = this._shouldGroup(e, target);
if (this._shouldClearSelection(e, target)) {
this.discardActiveObject(e);
}
else if (shouldGroup) {
this._handleGrouping(e, target);
target = this._activeObject;
}
if (this.selection && (!target ||
(!target.selectable && !target.isEditing && target !== this._activeObject))) {
this._groupSelector = {
ex: pointer.x,
ey: pointer.y,
top: 0,
left: 0
};
}
if (target) {
var alreadySelected = target === this._activeObject;
if (target.selectable) {
this.setActiveObject(target, e);
}
if (target === this._activeObject && (target.__corner || !shouldGroup)) {
this._setupCurrentTransform(e, target, alreadySelected);
}
}
this._handleEvent(e, 'down');
// we must renderAll so that we update the visuals
(shouldRender || shouldGroup) && this.requestRenderAll();
},
/**
* reset cache form common information needed during event processing
* @private
*/
_resetTransformEventData: function() {
this._target = null;
this._pointer = null;
this._absolutePointer = null;
},
/**
* Cache common information needed during event processing
* @private
* @param {Event} e Event object fired on event
*/
_cacheTransformEventData: function(e) {
// reset in order to avoid stale caching
this._resetTransformEventData();
this._pointer = this.getPointer(e, true);
this._absolutePointer = this.restorePointerVpt(this._pointer);
this._target = this._currentTransform ? this._currentTransform.target : this.findTarget(e) || null;
},
/**
* @private
*/
_beforeTransform: function(e) {
var t = this._currentTransform;
this.stateful && t.target.saveState();
this.fire('before:transform', {
e: e,
transform: t,
});
// determine if it's a drag or rotate case
if (t.corner) {
this.onBeforeScaleRotate(t.target);
}
},
/**
* Method that defines the actions when mouse is hovering the canvas.
* The currentTransform parameter will define whether the user is rotating/scaling/translating
* an image or neither of them (only hovering). A group selection is also possible and would cancel
* all any other type of action.
* In case of an image transformation only the top canvas will be rendered.
* @private
* @param {Event} e Event object fired on mousemove
*/
__onMouseMove: function (e) {
this._handleEvent(e, 'move:before');
this._cacheTransformEventData(e);
var target, pointer;
if (this.isDrawingMode) {
this._onMouseMoveInDrawingMode(e);
return;
}
if (!this._isMainEvent(e)) {
return;
}
var groupSelector = this._groupSelector;
// We initially clicked in an empty area, so we draw a box for multiple selection
if (groupSelector) {
pointer = this._pointer;
groupSelector.left = pointer.x - groupSelector.ex;
groupSelector.top = pointer.y - groupSelector.ey;
this.renderTop();
}
else if (!this._currentTransform) {
target = this.findTarget(e) || null;
this._setCursorFromEvent(e, target);
this._fireOverOutEvents(target, e);
}
else {
this._transformObject(e);
}
this._handleEvent(e, 'move');
this._resetTransformEventData();
},
/**
* Manage the mouseout, mouseover events for the fabric object on the canvas
* @param {Fabric.Object} target the target where the target from the mousemove event
* @param {Event} e Event object fired on mousemove
* @private
*/
_fireOverOutEvents: function(target, e) {
this.fireSyntheticInOutEvents(target, e, {
targetName: '_hoveredTarget',
canvasEvtOut: 'mouse:out',
evtOut: 'mouseout',
canvasEvtIn: 'mouse:over',
evtIn: 'mouseover',
});
},
/**
* Manage the dragEnter, dragLeave events for the fabric objects on the canvas
* @param {Fabric.Object} target the target where the target from the onDrag event
* @param {Event} e Event object fired on ondrag
* @private
*/
_fireEnterLeaveEvents: function(target, e) {
this.fireSyntheticInOutEvents(target, e, {
targetName: '_draggedoverTarget',
evtOut: 'dragleave',
evtIn: 'dragenter',
});
},
/**
* Manage the synthetic in/out events for the fabric objects on the canvas
* @param {Fabric.Object} target the target where the target from the supported events
* @param {Event} e Event object fired
* @param {Object} config configuration for the function to work
* @param {String} config.targetName property on the canvas where the old target is stored
* @param {String} [config.canvasEvtOut] name of the event to fire at canvas level for out
* @param {String} config.evtOut name of the event to fire for out
* @param {String} [config.canvasEvtIn] name of the event to fire at canvas level for in
* @param {String} config.evtIn name of the event to fire for in
* @private
*/
fireSyntheticInOutEvents: function(target, e, config) {
var inOpt, outOpt, oldTarget = this[config.targetName], outFires, inFires,
targetChanged = oldTarget !== target, canvasEvtIn = config.canvasEvtIn, canvasEvtOut = config.canvasEvtOut;
if (targetChanged) {
inOpt = { e: e, target: target, previousTarget: oldTarget };
outOpt = { e: e, target: oldTarget, nextTarget: target };
this[config.targetName] = target;
}
inFires = target && targetChanged;
outFires = oldTarget && targetChanged;
if (outFires) {
canvasEvtOut && this.fire(canvasEvtOut, outOpt);
oldTarget.fire(config.evtOut, outOpt);
}
if (inFires) {
canvasEvtIn && this.fire(canvasEvtIn, inOpt);
target.fire(config.evtIn, inOpt);
}
},
/**
* Method that defines actions when an Event Mouse Wheel
* @param {Event} e Event object fired on mouseup
*/
__onMouseWheel: function(e) {
this._cacheTransformEventData(e);
this._handleEvent(e, 'wheel');
this._resetTransformEventData();
},
/**
* @private
* @param {Event} e Event fired on mousemove
*/
_transformObject: function(e) {
var pointer = this.getPointer(e),
transform = this._currentTransform;
transform.reset = false;
transform.target.isMoving = true;
transform.shiftKey = e.shiftKey;
transform.altKey = e[this.centeredKey];
this._beforeScaleTransform(e, transform);
this._performTransformAction(e, transform, pointer);
transform.actionPerformed && this.requestRenderAll();
},
/**
* @private
*/
_performTransformAction: function(e, transform, pointer) {
var x = pointer.x,
y = pointer.y,
action = transform.action,
actionPerformed = false,
options = {
target: transform.target,
e: e,
transform: transform,
pointer: pointer
};
if (action === 'rotate') {
(actionPerformed = this._rotateObject(x, y)) && this._fire('rotating', options);
}
else if (action === 'scale') {
(actionPerformed = this._onScale(e, transform, x, y)) && this._fire('scaling', options);
}
else if (action === 'scaleX') {
(actionPerformed = this._scaleObject(x, y, 'x')) && this._fire('scaling', options);
}
else if (action === 'scaleY') {
(actionPerformed = this._scaleObject(x, y, 'y')) && this._fire('scaling', options);
}
else if (action === 'skewX') {
(actionPerformed = this._skewObject(x, y, 'x')) && this._fire('skewing', options);
}
else if (action === 'skewY') {
(actionPerformed = this._skewObject(x, y, 'y')) && this._fire('skewing', options);
}
else {
actionPerformed = this._translateObject(x, y);
if (actionPerformed) {
this._fire('moving', options);
this.setCursor(options.target.moveCursor || this.moveCursor);
}
}
transform.actionPerformed = transform.actionPerformed || actionPerformed;
},
/**
* @private
*/
_fire: function(eventName, options) {
this.fire('object:' + eventName, options);
options.target.fire(eventName, options);
},
/**
* @private
*/
_beforeScaleTransform: function(e, transform) {
if (transform.action === 'scale' || transform.action === 'scaleX' || transform.action === 'scaleY') {
var centerTransform = this._shouldCenterTransform(transform.target);
// Switch from a normal resize to center-based
if ((centerTransform && (transform.originX !== 'center' || transform.originY !== 'center')) ||
// Switch from center-based resize to normal one
(!centerTransform && transform.originX === 'center' && transform.originY === 'center')
) {
this._resetCurrentTransform();
transform.reset = true;
}
}
},
/**
* @private
* @param {Event} e Event object
* @param {Object} transform current transform
* @param {Number} x mouse position x from origin
* @param {Number} y mouse position y from origin
* @return {Boolean} true if the scaling occurred
*/
_onScale: function(e, transform, x, y) {
if (this._isUniscalePossible(e, transform.target)) {
transform.currentAction = 'scale';
return this._scaleObject(x, y);
}
else {
// Switch from a normal resize to proportional
if (!transform.reset && transform.currentAction === 'scale') {
this._resetCurrentTransform();
}
transform.currentAction = 'scaleEqually';
return this._scaleObject(x, y, 'equally');
}
},
/**
* @private
* @param {Event} e Event object
* @param {fabric.Object} target current target
* @return {Boolean} true if unproportional scaling is possible
*/
_isUniscalePossible: function(e, target) {
return (e[this.uniScaleKey] || this.uniScaleTransform) && !target.get('lockUniScaling');
},
/**
* Sets the cursor depending on where the canvas is being hovered.
* Note: very buggy in Opera
* @param {Event} e Event object
* @param {Object} target Object that the mouse is hovering, if so.
*/
_setCursorFromEvent: function (e, target) {
if (!target) {
this.setCursor(this.defaultCursor);
return false;
}
var hoverCursor = target.hoverCursor || this.hoverCursor,
activeSelection = this._activeObject && this._activeObject.type === 'activeSelection' ?
this._activeObject : null,
// only show proper corner when group selection is not active
corner = (!activeSelection || !activeSelection.contains(target))
&& target._findTargetCorner(this.getPointer(e, true));
if (!corner) {
this.setCursor(hoverCursor);
}
else {
this.setCursor(this.getCornerCursor(corner, target, e));
}
},
/**
* @private
*/
getCornerCursor: function(corner, target, e) {
if (this.actionIsDisabled(corner, target, e)) {
return this.notAllowedCursor;
}
else if (corner in cursorOffset) {
return this._getRotatedCornerCursor(corner, target, e);
}
else if (corner === 'mtr' && target.hasRotatingPoint) {
return this.rotationCursor;
}
else {
return this.defaultCursor;
}
},
actionIsDisabled: function(corner, target, e) {
if (corner === 'mt' || corner === 'mb') {
return e[this.altActionKey] ? target.lockSkewingX : target.lockScalingY;
}
else if (corner === 'ml' || corner === 'mr') {
return e[this.altActionKey] ? target.lockSkewingY : target.lockScalingX;
}
else if (corner === 'mtr') {
return target.lockRotation;
}
else {
return this._isUniscalePossible(e, target) ?
target.lockScalingX && target.lockScalingY : target.lockScalingX || target.lockScalingY;
}
},
/**
* @private
*/
_getRotatedCornerCursor: function(corner, target, e) {
var n = Math.round((target.angle % 360) / 45);
if (n < 0) {
n += 8; // full circle ahead
}
n += cursorOffset[corner];
if (e[this.altActionKey] && cursorOffset[corner] % 2 === 0) {
//if we are holding shift and we are on a mx corner...
n += 2;
}
// normalize n to be from 0 to 7
n %= 8;
return this.cursorMap[n];
}
});
})();
(function() {
var min = Math.min,
max = Math.max;
fabric.util.object.extend(fabric.Canvas.prototype, /** @lends fabric.Canvas.prototype */ {
/**
* @private
* @param {Event} e Event object
* @param {fabric.Object} target
* @return {Boolean}
*/
_shouldGroup: function(e, target) {
var activeObject = this._activeObject;
return activeObject && this._isSelectionKeyPressed(e) && target && target.selectable && this.selection &&
(activeObject !== target || activeObject.type === 'activeSelection') && !target.onSelect({ e: e });
},
/**
* @private
* @param {Event} e Event object
* @param {fabric.Object} target
*/
_handleGrouping: function (e, target) {
var activeObject = this._activeObject;
// avoid multi select when shift click on a corner
if (activeObject.__corner) {
return;
}
if (target === activeObject) {
// if it's a group, find target again, using activeGroup objects
target = this.findTarget(e, true);
// if even object is not found or we are on activeObjectCorner, bail out
if (!target || !target.selectable) {
return;
}
}
if (activeObject && activeObject.type === 'activeSelection') {
this._updateActiveSelection(target, e);
}
else {
this._createActiveSelection(target, e);
}
},
/**
* @private
*/
_updateActiveSelection: function(target, e) {
var activeSelection = this._activeObject,
currentActiveObjects = activeSelection._objects.slice(0);
if (activeSelection.contains(target)) {
activeSelection.removeWithUpdate(target);
this._hoveredTarget = target;
if (activeSelection.size() === 1) {
// activate last remaining object
this._setActiveObject(activeSelection.item(0), e);
}
}
else {
activeSelection.addWithUpdate(target);
this._hoveredTarget = activeSelection;
}
this._fireSelectionEvents(currentActiveObjects, e);
},
/**
* @private
*/
_createActiveSelection: function(target, e) {
var currentActives = this.getActiveObjects(), group = this._createGroup(target);
this._hoveredTarget = group;
this._setActiveObject(group, e);
this._fireSelectionEvents(currentActives, e);
},
/**
* @private
* @param {Object} target
*/
_createGroup: function(target) {
var objects = this._objects,
isActiveLower = objects.indexOf(this._activeObject) < objects.indexOf(target),
groupObjects = isActiveLower
? [this._activeObject, target]
: [target, this._activeObject];
this._activeObject.isEditing && this._activeObject.exitEditing();
return new fabric.ActiveSelection(groupObjects, {
canvas: this
});
},
/**
* @private
* @param {Event} e mouse event
*/
_groupSelectedObjects: function (e) {
var group = this._collectObjects(e),
aGroup;
// do not create group for 1 element only
if (group.length === 1) {
this.setActiveObject(group[0], e);
}
else if (group.length > 1) {
aGroup = new fabric.ActiveSelection(group.reverse(), {
canvas: this
});
this.setActiveObject(aGroup, e);
}
},
/**
* @private
*/
_collectObjects: function(e) {
var group = [],
currentObject,
x1 = this._groupSelector.ex,
y1 = this._groupSelector.ey,
x2 = x1 + this._groupSelector.left,
y2 = y1 + this._groupSelector.top,
selectionX1Y1 = new fabric.Point(min(x1, x2), min(y1, y2)),
selectionX2Y2 = new fabric.Point(max(x1, x2), max(y1, y2)),
allowIntersect = !this.selectionFullyContained,
isClick = x1 === x2 && y1 === y2;
// we iterate reverse order to collect top first in case of click.
for (var i = this._objects.length; i--; ) {
currentObject = this._objects[i];
if (!currentObject || !currentObject.selectable || !currentObject.visible) {
continue;
}
if ((allowIntersect && currentObject.intersectsWithRect(selectionX1Y1, selectionX2Y2)) ||
currentObject.isContainedWithinRect(selectionX1Y1, selectionX2Y2) ||
(allowIntersect && currentObject.containsPoint(selectionX1Y1)) ||
(allowIntersect && currentObject.containsPoint(selectionX2Y2))
) {
group.push(currentObject);
// only add one object if it's a click
if (isClick) {
break;
}
}
}
if (group.length > 1) {
group = group.filter(function(object) {
return !object.onSelect({ e: e });
});
}
return group;
},
/**
* @private
*/
_maybeGroupObjects: function(e) {
if (this.selection && this._groupSelector) {
this._groupSelectedObjects(e);
}
this.setCursor(this.defaultCursor);
// clear selection and current transformation
this._groupSelector = null;
}
});
})();
(function () {
fabric.util.object.extend(fabric.StaticCanvas.prototype, /** @lends fabric.StaticCanvas.prototype */ {
/**
* Exports canvas element to a dataurl image. Note that when multiplier is used, cropping is scaled appropriately
* @param {Object} [options] Options object
* @param {String} [options.format=png] The format of the output image. Either "jpeg" or "png"
* @param {Number} [options.quality=1] Quality level (0..1). Only used for jpeg.
* @param {Number} [options.multiplier=1] Multiplier to scale by, to have consistent
* @param {Number} [options.left] Cropping left offset. Introduced in v1.2.14
* @param {Number} [options.top] Cropping top offset. Introduced in v1.2.14
* @param {Number} [options.width] Cropping width. Introduced in v1.2.14
* @param {Number} [options.height] Cropping height. Introduced in v1.2.14
* @param {Boolean} [options.enableRetinaScaling] Enable retina scaling for clone image. Introduce in 2.0.0
* @return {String} Returns a data: URL containing a representation of the object in the format specified by options.format
* @see {@link http://jsfiddle.net/fabricjs/NfZVb/|jsFiddle demo}
* @example <caption>Generate jpeg dataURL with lower quality</caption>
* var dataURL = canvas.toDataURL({
* format: 'jpeg',
* quality: 0.8
* });
* @example <caption>Generate cropped png dataURL (clipping of canvas)</caption>
* var dataURL = canvas.toDataURL({
* format: 'png',
* left: 100,
* top: 100,
* width: 200,
* height: 200
* });
* @example <caption>Generate double scaled png dataURL</caption>
* var dataURL = canvas.toDataURL({
* format: 'png',
* multiplier: 2
* });
*/
toDataURL: function (options) {
options || (options = { });
var format = options.format || 'png',
quality = options.quality || 1,
multiplier = (options.multiplier || 1) * (options.enableRetinaScaling ? this.getRetinaScaling() : 1),
canvasEl = this.toCanvasElement(multiplier, options);
return fabric.util.toDataURL(canvasEl, format, quality);
},
/**
* Create a new HTMLCanvas element painted with the current canvas content.
* No need to resize the actual one or repaint it.
* Will transfer object ownership to a new canvas, paint it, and set everything back.
* This is an intermediary step used to get to a dataUrl but also it is useful to
* create quick image copies of a canvas without passing for the dataUrl string
* @param {Number} [multiplier] a zoom factor.
* @param {Object} [cropping] Cropping informations
* @param {Number} [cropping.left] Cropping left offset.
* @param {Number} [cropping.top] Cropping top offset.
* @param {Number} [cropping.width] Cropping width.
* @param {Number} [cropping.height] Cropping height.
*/
toCanvasElement: function(multiplier, cropping) {
multiplier = multiplier || 1;
cropping = cropping || { };
var scaledWidth = (cropping.width || this.width) * multiplier,
scaledHeight = (cropping.height || this.height) * multiplier,
zoom = this.getZoom(),
originalWidth = this.width,
originalHeight = this.height,
newZoom = zoom * multiplier,
vp = this.viewportTransform,
translateX = (vp[4] - (cropping.left || 0)) * multiplier,
translateY = (vp[5] - (cropping.top || 0)) * multiplier,
originalInteractive = this.interactive,
newVp = [newZoom, 0, 0, newZoom, translateX, translateY],
originalRetina = this.enableRetinaScaling,
canvasEl = fabric.util.createCanvasElement(),
originalContextTop = this.contextTop;
canvasEl.width = scaledWidth;
canvasEl.height = scaledHeight;
this.contextTop = null;
this.enableRetinaScaling = false;
this.interactive = false;
this.viewportTransform = newVp;
this.width = scaledWidth;
this.height = scaledHeight;
this.calcViewportBoundaries();
this.renderCanvas(canvasEl.getContext('2d'), this._objects);
this.viewportTransform = vp;
this.width = originalWidth;
this.height = originalHeight;
this.calcViewportBoundaries();
this.interactive = originalInteractive;
this.enableRetinaScaling = originalRetina;
this.contextTop = originalContextTop;
return canvasEl;
},
});
})();
fabric.util.object.extend(fabric.StaticCanvas.prototype, /** @lends fabric.StaticCanvas.prototype */ {
/**
* Populates canvas with data from the specified dataless JSON.
* JSON format must conform to the one of {@link fabric.Canvas#toDatalessJSON}
* @deprecated since 1.2.2
* @param {String|Object} json JSON string or object
* @param {Function} callback Callback, invoked when json is parsed
* and corresponding objects (e.g: {@link fabric.Image})
* are initialized
* @param {Function} [reviver] Method for further parsing of JSON elements, called after each fabric object created.
* @return {fabric.Canvas} instance
* @chainable
* @tutorial {@link http://fabricjs.com/fabric-intro-part-3#deserialization}
*/
loadFromDatalessJSON: function (json, callback, reviver) {
return this.loadFromJSON(json, callback, reviver);
},
/**
* Populates canvas with data from the specified JSON.
* JSON format must conform to the one of {@link fabric.Canvas#toJSON}
* @param {String|Object} json JSON string or object
* @param {Function} callback Callback, invoked when json is parsed
* and corresponding objects (e.g: {@link fabric.Image})
* are initialized
* @param {Function} [reviver] Method for further parsing of JSON elements, called after each fabric object created.
* @return {fabric.Canvas} instance
* @chainable
* @tutorial {@link http://fabricjs.com/fabric-intro-part-3#deserialization}
* @see {@link http://jsfiddle.net/fabricjs/fmgXt/|jsFiddle demo}
* @example <caption>loadFromJSON</caption>
* canvas.loadFromJSON(json, canvas.renderAll.bind(canvas));
* @example <caption>loadFromJSON with reviver</caption>
* canvas.loadFromJSON(json, canvas.renderAll.bind(canvas), function(o, object) {
* // `o` = json object
* // `object` = fabric.Object instance
* // ... do some stuff ...
* });
*/
loadFromJSON: function (json, callback, reviver) {
if (!json) {
return;
}
// serialize if it wasn't already
var serialized = (typeof json === 'string')
? JSON.parse(json)
: fabric.util.object.clone(json);
var _this = this,
clipPath = serialized.clipPath,
renderOnAddRemove = this.renderOnAddRemove;
this.renderOnAddRemove = false;
delete serialized.clipPath;
this._enlivenObjects(serialized.objects, function (enlivenedObjects) {
_this.clear();
_this._setBgOverlay(serialized, function () {
if (clipPath) {
_this._enlivenObjects([clipPath], function (enlivenedCanvasClip) {
_this.clipPath = enlivenedCanvasClip[0];
_this.__setupCanvas.call(_this, serialized, enlivenedObjects, renderOnAddRemove, callback);
});
}
else {
_this.__setupCanvas.call(_this, serialized, enlivenedObjects, renderOnAddRemove, callback);
}
});
}, reviver);
return this;
},
/**
* @private
* @param {Object} serialized Object with background and overlay information
* @param {Array} restored canvas objects
* @param {Function} cached renderOnAddRemove callback
* @param {Function} callback Invoked after all background and overlay images/patterns loaded
*/
__setupCanvas: function(serialized, enlivenedObjects, renderOnAddRemove, callback) {
var _this = this;
enlivenedObjects.forEach(function(obj, index) {
// we splice the array just in case some custom classes restored from JSON
// will add more object to canvas at canvas init.
_this.insertAt(obj, index);
});
this.renderOnAddRemove = renderOnAddRemove;
// remove parts i cannot set as options
delete serialized.objects;
delete serialized.backgroundImage;
delete serialized.overlayImage;
delete serialized.background;
delete serialized.overlay;
// this._initOptions does too many things to just
// call it. Normally loading an Object from JSON
// create the Object instance. Here the Canvas is
// already an instance and we are just loading things over it
this._setOptions(serialized);
this.renderAll();
callback && callback();
},
/**
* @private
* @param {Object} serialized Object with background and overlay information
* @param {Function} callback Invoked after all background and overlay images/patterns loaded
*/
_setBgOverlay: function(serialized, callback) {
var loaded = {
backgroundColor: false,
overlayColor: false,
backgroundImage: false,
overlayImage: false
};
if (!serialized.backgroundImage && !serialized.overlayImage && !serialized.background && !serialized.overlay) {
callback && callback();
return;
}
var cbIfLoaded = function () {
if (loaded.backgroundImage && loaded.overlayImage && loaded.backgroundColor && loaded.overlayColor) {
callback && callback();
}
};
this.__setBgOverlay('backgroundImage', serialized.backgroundImage, loaded, cbIfLoaded);
this.__setBgOverlay('overlayImage', serialized.overlayImage, loaded, cbIfLoaded);
this.__setBgOverlay('backgroundColor', serialized.background, loaded, cbIfLoaded);
this.__setBgOverlay('overlayColor', serialized.overlay, loaded, cbIfLoaded);
},
/**
* @private
* @param {String} property Property to set (backgroundImage, overlayImage, backgroundColor, overlayColor)
* @param {(Object|String)} value Value to set
* @param {Object} loaded Set loaded property to true if property is set
* @param {Object} callback Callback function to invoke after property is set
*/
__setBgOverlay: function(property, value, loaded, callback) {
var _this = this;
if (!value) {
loaded[property] = true;
callback && callback();
return;
}
if (property === 'backgroundImage' || property === 'overlayImage') {
fabric.util.enlivenObjects([value], function(enlivedObject){
_this[property] = enlivedObject[0];
loaded[property] = true;
callback && callback();
});
}
else {
this['set' + fabric.util.string.capitalize(property, true)](value, function() {
loaded[property] = true;
callback && callback();
});
}
},
/**
* @private
* @param {Array} objects
* @param {Function} callback
* @param {Function} [reviver]
*/
_enlivenObjects: function (objects, callback, reviver) {
if (!objects || objects.length === 0) {
callback && callback([]);
return;
}
fabric.util.enlivenObjects(objects, function(enlivenedObjects) {
callback && callback(enlivenedObjects);
}, null, reviver);
},
/**
* @private
* @param {String} format
* @param {Function} callback
*/
_toDataURL: function (format, callback) {
this.clone(function (clone) {
callback(clone.toDataURL(format));
});
},
/**
* @private
* @param {String} format
* @param {Number} multiplier
* @param {Function} callback
*/
_toDataURLWithMultiplier: function (format, multiplier, callback) {
this.clone(function (clone) {
callback(clone.toDataURLWithMultiplier(format, multiplier));
});
},
/**
* Clones canvas instance
* @param {Object} [callback] Receives cloned instance as a first argument
* @param {Array} [properties] Array of properties to include in the cloned canvas and children
*/
clone: function (callback, properties) {
var data = JSON.stringify(this.toJSON(properties));
this.cloneWithoutData(function(clone) {
clone.loadFromJSON(data, function() {
callback && callback(clone);
});
});
},
/**
* Clones canvas instance without cloning existing data.
* This essentially copies canvas dimensions, clipping properties, etc.
* but leaves data empty (so that you can populate it with your own)
* @param {Object} [callback] Receives cloned instance as a first argument
*/
cloneWithoutData: function(callback) {
var el = fabric.util.createCanvasElement();
el.width = this.width;
el.height = this.height;
var clone = new fabric.Canvas(el);
clone.clipTo = this.clipTo;
if (this.backgroundImage) {
clone.setBackgroundImage(this.backgroundImage.src, function() {
clone.renderAll();
callback && callback(clone);
});
clone.backgroundImageOpacity = this.backgroundImageOpacity;
clone.backgroundImageStretch = this.backgroundImageStretch;
}
else {
callback && callback(clone);
}
}
});
(function(global) {
'use strict';
var fabric = global.fabric || (global.fabric = { }),
extend = fabric.util.object.extend,
clone = fabric.util.object.clone,
toFixed = fabric.util.toFixed,
capitalize = fabric.util.string.capitalize,
degreesToRadians = fabric.util.degreesToRadians,
supportsLineDash = fabric.StaticCanvas.supports('setLineDash'),
objectCaching = !fabric.isLikelyNode,
ALIASING_LIMIT = 2;
if (fabric.Object) {
return;
}
/**
* Root object class from which all 2d shape classes inherit from
* @class fabric.Object
* @tutorial {@link http://fabricjs.com/fabric-intro-part-1#objects}
* @see {@link fabric.Object#initialize} for constructor definition
*
* @fires added
* @fires removed
*
* @fires selected
* @fires deselected
* @fires modified
* @fires modified
* @fires moved
* @fires scaled
* @fires rotated
* @fires skewed
*
* @fires rotating
* @fires scaling
* @fires moving
* @fires skewing
*
* @fires mousedown
* @fires mouseup
* @fires mouseover
* @fires mouseout
* @fires mousewheel
* @fires mousedblclick
*
* @fires dragover
* @fires dragenter
* @fires dragleave
* @fires drop
*/
fabric.Object = fabric.util.createClass(fabric.CommonMethods, /** @lends fabric.Object.prototype */ {
/**
* Type of an object (rect, circle, path, etc.).
* Note that this property is meant to be read-only and not meant to be modified.
* If you modify, certain parts of Fabric (such as JSON loading) won't work correctly.
* @type String
* @default
*/
type: 'object',
/**
* Horizontal origin of transformation of an object (one of "left", "right", "center")
* See http://jsfiddle.net/1ow02gea/244/ on how originX/originY affect objects in groups
* @type String
* @default
*/
originX: 'left',
/**
* Vertical origin of transformation of an object (one of "top", "bottom", "center")
* See http://jsfiddle.net/1ow02gea/244/ on how originX/originY affect objects in groups
* @type String
* @default
*/
originY: 'top',
/**
* Top position of an object. Note that by default it's relative to object top. You can change this by setting originY={top/center/bottom}
* @type Number
* @default
*/
top: 0,
/**
* Left position of an object. Note that by default it's relative to object left. You can change this by setting originX={left/center/right}
* @type Number
* @default
*/
left: 0,
/**
* Object width
* @type Number
* @default
*/
width: 0,
/**
* Object height
* @type Number
* @default
*/
height: 0,
/**
* Object scale factor (horizontal)
* @type Number
* @default
*/
scaleX: 1,
/**
* Object scale factor (vertical)
* @type Number
* @default
*/
scaleY: 1,
/**
* When true, an object is rendered as flipped horizontally
* @type Boolean
* @default
*/
flipX: false,
/**
* When true, an object is rendered as flipped vertically
* @type Boolean
* @default
*/
flipY: false,
/**
* Opacity of an object
* @type Number
* @default
*/
opacity: 1,
/**
* Angle of rotation of an object (in degrees)
* @type Number
* @default
*/
angle: 0,
/**
* Angle of skew on x axes of an object (in degrees)
* @type Number
* @default
*/
skewX: 0,
/**
* Angle of skew on y axes of an object (in degrees)
* @type Number
* @default
*/
skewY: 0,
/**
* Size of object's controlling corners (in pixels)
* @type Number
* @default
*/
cornerSize: 13,
/**
* When true, object's controlling corners are rendered as transparent inside (i.e. stroke instead of fill)
* @type Boolean
* @default
*/
transparentCorners: true,
/**
* Default cursor value used when hovering over this object on canvas
* @type String
* @default
*/
hoverCursor: null,
/**
* Default cursor value used when moving this object on canvas
* @type String
* @default
*/
moveCursor: null,
/**
* Padding between object and its controlling borders (in pixels)
* @type Number
* @default
*/
padding: 0,
/**
* Color of controlling borders of an object (when it's active)
* @type String
* @default
*/
borderColor: 'rgba(102,153,255,0.75)',
/**
* Array specifying dash pattern of an object's borders (hasBorder must be true)
* @since 1.6.2
* @type Array
*/
borderDashArray: null,
/**
* Color of controlling corners of an object (when it's active)
* @type String
* @default
*/
cornerColor: 'rgba(102,153,255,0.5)',
/**
* Color of controlling corners of an object (when it's active and transparentCorners false)
* @since 1.6.2
* @type String
* @default
*/
cornerStrokeColor: null,
/**
* Specify style of control, 'rect' or 'circle'
* @since 1.6.2
* @type String
*/
cornerStyle: 'rect',
/**
* Array specifying dash pattern of an object's control (hasBorder must be true)
* @since 1.6.2
* @type Array
*/
cornerDashArray: null,
/**
* When true, this object will use center point as the origin of transformation
* when being scaled via the controls.
* <b>Backwards incompatibility note:</b> This property replaces "centerTransform" (Boolean).
* @since 1.3.4
* @type Boolean
* @default
*/
centeredScaling: false,
/**
* When true, this object will use center point as the origin of transformation
* when being rotated via the controls.
* <b>Backwards incompatibility note:</b> This property replaces "centerTransform" (Boolean).
* @since 1.3.4
* @type Boolean
* @default
*/
centeredRotation: true,
/**
* Color of object's fill
* takes css colors https://www.w3.org/TR/css-color-3/
* @type String
* @default
*/
fill: 'rgb(0,0,0)',
/**
* Fill rule used to fill an object
* accepted values are nonzero, evenodd
* <b>Backwards incompatibility note:</b> This property was used for setting globalCompositeOperation until v1.4.12 (use `fabric.Object#globalCompositeOperation` instead)
* @type String
* @default
*/
fillRule: 'nonzero',
/**
* Composite rule used for canvas globalCompositeOperation
* @type String
* @default
*/
globalCompositeOperation: 'source-over',
/**
* Background color of an object.
* takes css colors https://www.w3.org/TR/css-color-3/
* @type String
* @default
*/
backgroundColor: '',
/**
* Selection Background color of an object. colored layer behind the object when it is active.
* does not mix good with globalCompositeOperation methods.
* @type String
* @default
*/
selectionBackgroundColor: '',
/**
* When defined, an object is rendered via stroke and this property specifies its color
* takes css colors https://www.w3.org/TR/css-color-3/
* @type String
* @default
*/
stroke: null,
/**
* Width of a stroke used to render this object
* @type Number
* @default
*/
strokeWidth: 1,
/**
* Array specifying dash pattern of an object's stroke (stroke must be defined)
* @type Array
*/
strokeDashArray: null,
/**
* Line offset of an object's stroke
* @type Number
* @default
*/
strokeDashOffset: 0,
/**
* Line endings style of an object's stroke (one of "butt", "round", "square")
* @type String
* @default
*/
strokeLineCap: 'butt',
/**
* Corner style of an object's stroke (one of "bevil", "round", "miter")
* @type String
* @default
*/
strokeLineJoin: 'miter',
/**
* Maximum miter length (used for strokeLineJoin = "miter") of an object's stroke
* @type Number
* @default
*/
strokeMiterLimit: 4,
/**
* Shadow object representing shadow of this shape
* @type fabric.Shadow
* @default
*/
shadow: null,
/**
* Opacity of object's controlling borders when object is active and moving
* @type Number
* @default
*/
borderOpacityWhenMoving: 0.4,
/**
* Scale factor of object's controlling borders
* @type Number
* @default
*/
borderScaleFactor: 1,
/**
* Transform matrix (similar to SVG's transform matrix)
* This property has been depreacted. Since caching and and qrDecompose this
* property can be handled with the standard top,left,scaleX,scaleY,angle and skewX.
* A documentation example on how to parse and merge a transformMatrix will be provided before
* completely removing it in fabric 4.0
* If you are starting a project now, DO NOT use it.
* @deprecated since 3.2.0
* @type Array
*/
transformMatrix: null,
/**
* Minimum allowed scale value of an object
* @type Number
* @default
*/
minScaleLimit: 0,
/**
* When set to `false`, an object can not be selected for modification (using either point-click-based or group-based selection).
* But events still fire on it.
* @type Boolean
* @default
*/
selectable: true,
/**
* When set to `false`, an object can not be a target of events. All events propagate through it. Introduced in v1.3.4
* @type Boolean
* @default
*/
evented: true,
/**
* When set to `false`, an object is not rendered on canvas
* @type Boolean
* @default
*/
visible: true,
/**
* When set to `false`, object's controls are not displayed and can not be used to manipulate object
* @type Boolean
* @default
*/
hasControls: true,
/**
* When set to `false`, object's controlling borders are not rendered
* @type Boolean
* @default
*/
hasBorders: true,
/**
* When set to `false`, object's controlling rotating point will not be visible or selectable
* @type Boolean
* @default
*/
hasRotatingPoint: true,
/**
* Offset for object's controlling rotating point (when enabled via `hasRotatingPoint`)
* @type Number
* @default
*/
rotatingPointOffset: 40,
/**
* When set to `true`, objects are "found" on canvas on per-pixel basis rather than according to bounding box
* @type Boolean
* @default
*/
perPixelTargetFind: false,
/**
* When `false`, default object's values are not included in its serialization
* @type Boolean
* @default
*/
includeDefaultValues: true,
/**
* Function that determines clipping of an object (context is passed as a first argument).
* If you are using code minification, ctx argument can be minified/manglied you should use
* as a workaround `var ctx = arguments[0];` in the function;
* Note that context origin is at the object's center point (not left/top corner)
* @deprecated since 2.0.0
* @type Function
*/
clipTo: null,
/**
* When `true`, object horizontal movement is locked
* @type Boolean
* @default
*/
lockMovementX: false,
/**
* When `true`, object vertical movement is locked
* @type Boolean
* @default
*/
lockMovementY: false,
/**
* When `true`, object rotation is locked
* @type Boolean
* @default
*/
lockRotation: false,
/**
* When `true`, object horizontal scaling is locked
* @type Boolean
* @default
*/
lockScalingX: false,
/**
* When `true`, object vertical scaling is locked
* @type Boolean
* @default
*/
lockScalingY: false,
/**
* When `true`, object non-uniform scaling is locked
* @type Boolean
* @default
*/
lockUniScaling: false,
/**
* When `true`, object horizontal skewing is locked
* @type Boolean
* @default
*/
lockSkewingX: false,
/**
* When `true`, object vertical skewing is locked
* @type Boolean
* @default
*/
lockSkewingY: false,
/**
* When `true`, object cannot be flipped by scaling into negative values
* @type Boolean
* @default
*/
lockScalingFlip: false,
/**
* When `true`, object is not exported in OBJECT/JSON
* @since 1.6.3
* @type Boolean
* @default
*/
excludeFromExport: false,
/**
* When `true`, object is cached on an additional canvas.
* When `false`, object is not cached unless necessary ( clipPath )
* default to true
* @since 1.7.0
* @type Boolean
* @default true
*/
objectCaching: objectCaching,
/**
* When `true`, object properties are checked for cache invalidation. In some particular
* situation you may want this to be disabled ( spray brush, very big, groups)
* or if your application does not allow you to modify properties for groups child you want
* to disable it for groups.
* default to false
* since 1.7.0
* @type Boolean
* @default false
*/
statefullCache: false,
/**
* When `true`, cache does not get updated during scaling. The picture will get blocky if scaled
* too much and will be redrawn with correct details at the end of scaling.
* this setting is performance and application dependant.
* default to true
* since 1.7.0
* @type Boolean
* @default true
*/
noScaleCache: true,
/**
* When `false`, the stoke width will scale with the object.
* When `true`, the stroke will always match the exact pixel size entered for stroke width.
* default to false
* @since 2.6.0
* @type Boolean
* @default false
* @type Boolean
* @default false
*/
strokeUniform: false,
/**
* When set to `true`, object's cache will be rerendered next render call.
* since 1.7.0
* @type Boolean
* @default true
*/
dirty: true,
/**
* keeps the value of the last hovered corner during mouse move.
* 0 is no corner, or 'mt', 'ml', 'mtr' etc..
* It should be private, but there is no harm in using it as
* a read-only property.
* @type number|string|any
* @default 0
*/
__corner: 0,
/**
* Determines if the fill or the stroke is drawn first (one of "fill" or "stroke")
* @type String
* @default
*/
paintFirst: 'fill',
/**
* List of properties to consider when checking if state
* of an object is changed (fabric.Object#hasStateChanged)
* as well as for history (undo/redo) purposes
* @type Array
*/
stateProperties: (
'top left width height scaleX scaleY flipX flipY originX originY transformMatrix ' +
'stroke strokeWidth strokeDashArray strokeLineCap strokeDashOffset strokeLineJoin strokeMiterLimit ' +
'angle opacity fill globalCompositeOperation shadow clipTo visible backgroundColor ' +
'skewX skewY fillRule paintFirst clipPath strokeUniform'
).split(' '),
/**
* List of properties to consider when checking if cache needs refresh
* Those properties are checked by statefullCache ON ( or lazy mode if we want ) or from single
* calls to Object.set(key, value). If the key is in this list, the object is marked as dirty
* and refreshed at the next render
* @type Array
*/
cacheProperties: (
'fill stroke strokeWidth strokeDashArray width height paintFirst strokeUniform' +
' strokeLineCap strokeDashOffset strokeLineJoin strokeMiterLimit backgroundColor clipPath'
).split(' '),
/**
* a fabricObject that, without stroke define a clipping area with their shape. filled in black
* the clipPath object gets used when the object has rendered, and the context is placed in the center
* of the object cacheCanvas.
* If you want 0,0 of a clipPath to align with an object center, use clipPath.originX/Y to 'center'
* @type fabric.Object
*/
clipPath: undefined,
/**
* Meaningful ONLY when the object is used as clipPath.
* if true, the clipPath will make the object clip to the outside of the clipPath
* since 2.4.0
* @type boolean
* @default false
*/
inverted: false,
/**
* Meaningful ONLY when the object is used as clipPath.
* if true, the clipPath will have its top and left relative to canvas, and will
* not be influenced by the object transform. This will make the clipPath relative
* to the canvas, but clipping just a particular object.
* WARNING this is beta, this feature may change or be renamed.
* since 2.4.0
* @type boolean
* @default false
*/
absolutePositioned: false,
/**
* Constructor
* @param {Object} [options] Options object
*/
initialize: function(options) {
if (options) {
this.setOptions(options);
}
},
/**
* Create a the canvas used to keep the cached copy of the object
* @private
*/
_createCacheCanvas: function() {
this._cacheProperties = {};
this._cacheCanvas = fabric.util.createCanvasElement();
this._cacheContext = this._cacheCanvas.getContext('2d');
this._updateCacheCanvas();
// if canvas gets created, is empty, so dirty.
this.dirty = true;
},
/**
* Limit the cache dimensions so that X * Y do not cross fabric.perfLimitSizeTotal
* and each side do not cross fabric.cacheSideLimit
* those numbers are configurable so that you can get as much detail as you want
* making bargain with performances.
* @param {Object} dims
* @param {Object} dims.width width of canvas
* @param {Object} dims.height height of canvas
* @param {Object} dims.zoomX zoomX zoom value to unscale the canvas before drawing cache
* @param {Object} dims.zoomY zoomY zoom value to unscale the canvas before drawing cache
* @return {Object}.width width of canvas
* @return {Object}.height height of canvas
* @return {Object}.zoomX zoomX zoom value to unscale the canvas before drawing cache
* @return {Object}.zoomY zoomY zoom value to unscale the canvas before drawing cache
*/
_limitCacheSize: function(dims) {
var perfLimitSizeTotal = fabric.perfLimitSizeTotal,
width = dims.width, height = dims.height,
max = fabric.maxCacheSideLimit, min = fabric.minCacheSideLimit;
if (width <= max && height <= max && width * height <= perfLimitSizeTotal) {
if (width < min) {
dims.width = min;
}
if (height < min) {
dims.height = min;
}
return dims;
}
var ar = width / height, limitedDims = fabric.util.limitDimsByArea(ar, perfLimitSizeTotal),
capValue = fabric.util.capValue,
x = capValue(min, limitedDims.x, max),
y = capValue(min, limitedDims.y, max);
if (width > x) {
dims.zoomX /= width / x;
dims.width = x;
dims.capped = true;
}
if (height > y) {
dims.zoomY /= height / y;
dims.height = y;
dims.capped = true;
}
return dims;
},
/**
* Return the dimension and the zoom level needed to create a cache canvas
* big enough to host the object to be cached.
* @private
* @return {Object}.x width of object to be cached
* @return {Object}.y height of object to be cached
* @return {Object}.width width of canvas
* @return {Object}.height height of canvas
* @return {Object}.zoomX zoomX zoom value to unscale the canvas before drawing cache
* @return {Object}.zoomY zoomY zoom value to unscale the canvas before drawing cache
*/
_getCacheCanvasDimensions: function() {
var objectScale = this.getTotalObjectScaling(),
// caculate dimensions without skewing
dim = this._getTransformedDimensions(0, 0),
neededX = dim.x * objectScale.scaleX / this.scaleX,
neededY = dim.y * objectScale.scaleY / this.scaleY;
return {
// for sure this ALIASING_LIMIT is slightly creating problem
// in situation in which the cache canvas gets an upper limit
// also objectScale contains already scaleX and scaleY
width: neededX + ALIASING_LIMIT,
height: neededY + ALIASING_LIMIT,
zoomX: objectScale.scaleX,
zoomY: objectScale.scaleY,
x: neededX,
y: neededY
};
},
/**
* Update width and height of the canvas for cache
* returns true or false if canvas needed resize.
* @private
* @return {Boolean} true if the canvas has been resized
*/
_updateCacheCanvas: function() {
var targetCanvas = this.canvas;
if (this.noScaleCache && targetCanvas && targetCanvas._currentTransform) {
var target = targetCanvas._currentTransform.target,
action = targetCanvas._currentTransform.action;
if (this === target && action.slice && action.slice(0, 5) === 'scale') {
return false;
}
}
var canvas = this._cacheCanvas,
dims = this._limitCacheSize(this._getCacheCanvasDimensions()),
minCacheSize = fabric.minCacheSideLimit,
width = dims.width, height = dims.height, drawingWidth, drawingHeight,
zoomX = dims.zoomX, zoomY = dims.zoomY,
dimensionsChanged = width !== this.cacheWidth || height !== this.cacheHeight,
zoomChanged = this.zoomX !== zoomX || this.zoomY !== zoomY,
shouldRedraw = dimensionsChanged || zoomChanged,
additionalWidth = 0, additionalHeight = 0, shouldResizeCanvas = false;
if (dimensionsChanged) {
var canvasWidth = this._cacheCanvas.width,
canvasHeight = this._cacheCanvas.height,
sizeGrowing = width > canvasWidth || height > canvasHeight,
sizeShrinking = (width < canvasWidth * 0.9 || height < canvasHeight * 0.9) &&
canvasWidth > minCacheSize && canvasHeight > minCacheSize;
shouldResizeCanvas = sizeGrowing || sizeShrinking;
if (sizeGrowing && !dims.capped && (width > minCacheSize || height > minCacheSize)) {
additionalWidth = width * 0.1;
additionalHeight = height * 0.1;
}
}
if (shouldRedraw) {
if (shouldResizeCanvas) {
canvas.width = Math.ceil(width + additionalWidth);
canvas.height = Math.ceil(height + additionalHeight);
}
else {
this._cacheContext.setTransform(1, 0, 0, 1, 0, 0);
this._cacheContext.clearRect(0, 0, canvas.width, canvas.height);
}
drawingWidth = dims.x / 2;
drawingHeight = dims.y / 2;
this.cacheTranslationX = Math.round(canvas.width / 2 - drawingWidth) + drawingWidth;
this.cacheTranslationY = Math.round(canvas.height / 2 - drawingHeight) + drawingHeight;
this.cacheWidth = width;
this.cacheHeight = height;
this._cacheContext.translate(this.cacheTranslationX, this.cacheTranslationY);
this._cacheContext.scale(zoomX, zoomY);
this.zoomX = zoomX;
this.zoomY = zoomY;
return true;
}
return false;
},
/**
* Sets object's properties from options
* @param {Object} [options] Options object
*/
setOptions: function(options) {
this._setOptions(options);
this._initGradient(options.fill, 'fill');
this._initGradient(options.stroke, 'stroke');
this._initClipping(options);
this._initPattern(options.fill, 'fill');
this._initPattern(options.stroke, 'stroke');
},
/**
* Transforms context when rendering an object
* @param {CanvasRenderingContext2D} ctx Context
*/
transform: function(ctx) {
var m;
if (this.group && !this.group._transformDone) {
m = this.calcTransformMatrix();
}
else {
m = this.calcOwnMatrix();
}
ctx.transform(m[0], m[1], m[2], m[3], m[4], m[5]);
},
/**
* Returns an object representation of an instance
* @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output
* @return {Object} Object representation of an instance
*/
toObject: function(propertiesToInclude) {
var NUM_FRACTION_DIGITS = fabric.Object.NUM_FRACTION_DIGITS,
object = {
type: this.type,
version: fabric.version,
originX: this.originX,
originY: this.originY,
left: toFixed(this.left, NUM_FRACTION_DIGITS),
top: toFixed(this.top, NUM_FRACTION_DIGITS),
width: toFixed(this.width, NUM_FRACTION_DIGITS),
height: toFixed(this.height, NUM_FRACTION_DIGITS),
fill: (this.fill && this.fill.toObject) ? this.fill.toObject() : this.fill,
stroke: (this.stroke && this.stroke.toObject) ? this.stroke.toObject() : this.stroke,
strokeWidth: toFixed(this.strokeWidth, NUM_FRACTION_DIGITS),
strokeDashArray: this.strokeDashArray ? this.strokeDashArray.concat() : this.strokeDashArray,
strokeLineCap: this.strokeLineCap,
strokeDashOffset: this.strokeDashOffset,
strokeLineJoin: this.strokeLineJoin,
strokeMiterLimit: toFixed(this.strokeMiterLimit, NUM_FRACTION_DIGITS),
scaleX: toFixed(this.scaleX, NUM_FRACTION_DIGITS),
scaleY: toFixed(this.scaleY, NUM_FRACTION_DIGITS),
angle: toFixed(this.angle, NUM_FRACTION_DIGITS),
flipX: this.flipX,
flipY: this.flipY,
opacity: toFixed(this.opacity, NUM_FRACTION_DIGITS),
shadow: (this.shadow && this.shadow.toObject) ? this.shadow.toObject() : this.shadow,
visible: this.visible,
clipTo: this.clipTo && String(this.clipTo),
backgroundColor: this.backgroundColor,
fillRule: this.fillRule,
paintFirst: this.paintFirst,
globalCompositeOperation: this.globalCompositeOperation,
transformMatrix: this.transformMatrix ? this.transformMatrix.concat() : null,
skewX: toFixed(this.skewX, NUM_FRACTION_DIGITS),
skewY: toFixed(this.skewY, NUM_FRACTION_DIGITS),
};
if (this.clipPath) {
object.clipPath = this.clipPath.toObject(propertiesToInclude);
object.clipPath.inverted = this.clipPath.inverted;
object.clipPath.absolutePositioned = this.clipPath.absolutePositioned;
}
fabric.util.populateWithProperties(this, object, propertiesToInclude);
if (!this.includeDefaultValues) {
object = this._removeDefaultValues(object);
}
return object;
},
/**
* Returns (dataless) object representation of an instance
* @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output
* @return {Object} Object representation of an instance
*/
toDatalessObject: function(propertiesToInclude) {
// will be overwritten by subclasses
return this.toObject(propertiesToInclude);
},
/**
* @private
* @param {Object} object
*/
_removeDefaultValues: function(object) {
var prototype = fabric.util.getKlass(object.type).prototype,
stateProperties = prototype.stateProperties;
stateProperties.forEach(function(prop) {
if (prop === 'left' || prop === 'top') {
return;
}
if (object[prop] === prototype[prop]) {
delete object[prop];
}
var isArray = Object.prototype.toString.call(object[prop]) === '[object Array]' &&
Object.prototype.toString.call(prototype[prop]) === '[object Array]';
// basically a check for [] === []
if (isArray && object[prop].length === 0 && prototype[prop].length === 0) {
delete object[prop];
}
});
return object;
},
/**
* Returns a string representation of an instance
* @return {String}
*/
toString: function() {
return '#<fabric.' + capitalize(this.type) + '>';
},
/**
* Return the object scale factor counting also the group scaling
* @return {Object} object with scaleX and scaleY properties
*/
getObjectScaling: function() {
var scaleX = this.scaleX, scaleY = this.scaleY;
if (this.group) {
var scaling = this.group.getObjectScaling();
scaleX *= scaling.scaleX;
scaleY *= scaling.scaleY;
}
return { scaleX: scaleX, scaleY: scaleY };
},
/**
* Return the object scale factor counting also the group scaling, zoom and retina
* @return {Object} object with scaleX and scaleY properties
*/
getTotalObjectScaling: function() {
var scale = this.getObjectScaling(), scaleX = scale.scaleX, scaleY = scale.scaleY;
if (this.canvas) {
var zoom = this.canvas.getZoom();
var retina = this.canvas.getRetinaScaling();
scaleX *= zoom * retina;
scaleY *= zoom * retina;
}
return { scaleX: scaleX, scaleY: scaleY };
},
/**
* Return the object opacity counting also the group property
* @return {Number}
*/
getObjectOpacity: function() {
var opacity = this.opacity;
if (this.group) {
opacity *= this.group.getObjectOpacity();
}
return opacity;
},
/**
* @private
* @param {String} key
* @param {*} value
* @return {fabric.Object} thisArg
*/
_set: function(key, value) {
var shouldConstrainValue = (key === 'scaleX' || key === 'scaleY'),
isChanged = this[key] !== value, groupNeedsUpdate = false;
if (shouldConstrainValue) {
value = this._constrainScale(value);
}
if (key === 'scaleX' && value < 0) {
this.flipX = !this.flipX;
value *= -1;
}
else if (key === 'scaleY' && value < 0) {
this.flipY = !this.flipY;
value *= -1;
}
else if (key === 'shadow' && value && !(value instanceof fabric.Shadow)) {
value = new fabric.Shadow(value);
}
else if (key === 'dirty' && this.group) {
this.group.set('dirty', value);
}
this[key] = value;
if (isChanged) {
groupNeedsUpdate = this.group && this.group.isOnACache();
if (this.cacheProperties.indexOf(key) > -1) {
this.dirty = true;
groupNeedsUpdate && this.group.set('dirty', true);
}
else if (groupNeedsUpdate && this.stateProperties.indexOf(key) > -1) {
this.group.set('dirty', true);
}
}
return this;
},
/**
* This callback function is called by the parent group of an object every
* time a non-delegated property changes on the group. It is passed the key
* and value as parameters. Not adding in this function's signature to avoid
* Travis build error about unused variables.
*/
setOnGroup: function() {
// implemented by sub-classes, as needed.
},
/**
* Retrieves viewportTransform from Object's canvas if possible
* @method getViewportTransform
* @memberOf fabric.Object.prototype
* @return {Array}
*/
getViewportTransform: function() {
if (this.canvas && this.canvas.viewportTransform) {
return this.canvas.viewportTransform;
}
return fabric.iMatrix.concat();
},
/*
* @private
* return if the object would be visible in rendering
* @memberOf fabric.Object.prototype
* @return {Boolean}
*/
isNotVisible: function() {
return this.opacity === 0 ||
(this.width === 0 && this.height === 0 && this.strokeWidth === 0) ||
!this.visible;
},
/**
* Renders an object on a specified context
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
render: function(ctx) {
// do not render if width/height are zeros or object is not visible
if (this.isNotVisible()) {
return;
}
if (this.canvas && this.canvas.skipOffscreen && !this.group && !this.isOnScreen()) {
return;
}
ctx.save();
this._setupCompositeOperation(ctx);
this.drawSelectionBackground(ctx);
this.transform(ctx);
this._setOpacity(ctx);
this._setShadow(ctx, this);
if (this.transformMatrix) {
ctx.transform.apply(ctx, this.transformMatrix);
}
this.clipTo && fabric.util.clipContext(this, ctx);
if (this.shouldCache()) {
this.renderCache();
this.drawCacheOnCanvas(ctx);
}
else {
this._removeCacheCanvas();
this.dirty = false;
this.drawObject(ctx);
if (this.objectCaching && this.statefullCache) {
this.saveState({ propertySet: 'cacheProperties' });
}
}
this.clipTo && ctx.restore();
ctx.restore();
},
renderCache: function(options) {
options = options || {};
if (!this._cacheCanvas) {
this._createCacheCanvas();
}
if (this.isCacheDirty()) {
this.statefullCache && this.saveState({ propertySet: 'cacheProperties' });
this.drawObject(this._cacheContext, options.forClipping);
this.dirty = false;
}
},
/**
* Remove cacheCanvas and its dimensions from the objects
*/
_removeCacheCanvas: function() {
this._cacheCanvas = null;
this.cacheWidth = 0;
this.cacheHeight = 0;
},
/**
* return true if the object will draw a stroke
* Does not consider text styles. This is just a shortcut used at rendering time
* We want it to be an aproximation and be fast.
* wrote to avoid extra caching, it has to return true when stroke happens,
* can guess when it will not happen at 100% chance, does not matter if it misses
* some use case where the stroke is invisible.
* @since 3.0.0
* @returns Boolean
*/
hasStroke: function() {
return this.stroke && this.stroke !== 'transparent' && this.strokeWidth !== 0;
},
/**
* return true if the object will draw a fill
* Does not consider text styles. This is just a shortcut used at rendering time
* We want it to be an aproximation and be fast.
* wrote to avoid extra caching, it has to return true when fill happens,
* can guess when it will not happen at 100% chance, does not matter if it misses
* some use case where the fill is invisible.
* @since 3.0.0
* @returns Boolean
*/
hasFill: function() {
return this.fill && this.fill !== 'transparent';
},
/**
* When set to `true`, force the object to have its own cache, even if it is inside a group
* it may be needed when your object behave in a particular way on the cache and always needs
* its own isolated canvas to render correctly.
* Created to be overridden
* since 1.7.12
* @returns Boolean
*/
needsItsOwnCache: function() {
if (this.paintFirst === 'stroke' &&
this.hasFill() && this.hasStroke() && typeof this.shadow === 'object') {
return true;
}
if (this.clipPath) {
return true;
}
return false;
},
/**
* Decide if the object should cache or not. Create its own cache level
* objectCaching is a global flag, wins over everything
* needsItsOwnCache should be used when the object drawing method requires
* a cache step. None of the fabric classes requires it.
* Generally you do not cache objects in groups because the group outside is cached.
* Read as: cache if is needed, or if the feature is enabled but we are not already caching.
* @return {Boolean}
*/
shouldCache: function() {
this.ownCaching = this.needsItsOwnCache() || (
this.objectCaching &&
(!this.group || !this.group.isOnACache())
);
return this.ownCaching;
},
/**
* Check if this object or a child object will cast a shadow
* used by Group.shouldCache to know if child has a shadow recursively
* @return {Boolean}
*/
willDrawShadow: function() {
return !!this.shadow && (this.shadow.offsetX !== 0 || this.shadow.offsetY !== 0);
},
/**
* Execute the drawing operation for an object clipPath
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
drawClipPathOnCache: function(ctx) {
var path = this.clipPath;
ctx.save();
// DEBUG: uncomment this line, comment the following
// ctx.globalAlpha = 0.4
if (path.inverted) {
ctx.globalCompositeOperation = 'destination-out';
}
else {
ctx.globalCompositeOperation = 'destination-in';
}
//ctx.scale(1 / 2, 1 / 2);
if (path.absolutePositioned) {
var m = fabric.util.invertTransform(this.calcTransformMatrix());
ctx.transform(m[0], m[1], m[2], m[3], m[4], m[5]);
}
path.transform(ctx);
ctx.scale(1 / path.zoomX, 1 / path.zoomY);
ctx.drawImage(path._cacheCanvas, -path.cacheTranslationX, -path.cacheTranslationY);
ctx.restore();
},
/**
* Execute the drawing operation for an object on a specified context
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
drawObject: function(ctx, forClipping) {
var originalFill = this.fill, originalStroke = this.stroke;
if (forClipping) {
this.fill = 'black';
this.stroke = '';
this._setClippingProperties(ctx);
}
else {
this._renderBackground(ctx);
this._setStrokeStyles(ctx, this);
this._setFillStyles(ctx, this);
}
this._render(ctx);
this._drawClipPath(ctx);
this.fill = originalFill;
this.stroke = originalStroke;
},
_drawClipPath: function(ctx) {
var path = this.clipPath;
if (!path) { return; }
// needed to setup a couple of variables
// path canvas gets overridden with this one.
// TODO find a better solution?
path.canvas = this.canvas;
path.shouldCache();
path._transformDone = true;
path.renderCache({ forClipping: true });
this.drawClipPathOnCache(ctx);
},
/**
* Paint the cached copy of the object on the target context.
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
drawCacheOnCanvas: function(ctx) {
ctx.scale(1 / this.zoomX, 1 / this.zoomY);
ctx.drawImage(this._cacheCanvas, -this.cacheTranslationX, -this.cacheTranslationY);
},
/**
* Check if cache is dirty
* @param {Boolean} skipCanvas skip canvas checks because this object is painted
* on parent canvas.
*/
isCacheDirty: function(skipCanvas) {
if (this.isNotVisible()) {
return false;
}
if (this._cacheCanvas && !skipCanvas && this._updateCacheCanvas()) {
// in this case the context is already cleared.
return true;
}
else {
if (this.dirty ||
(this.clipPath && this.clipPath.absolutePositioned) ||
(this.statefullCache && this.hasStateChanged('cacheProperties'))
) {
if (this._cacheCanvas && !skipCanvas) {
var width = this.cacheWidth / this.zoomX;
var height = this.cacheHeight / this.zoomY;
this._cacheContext.clearRect(-width / 2, -height / 2, width, height);
}
return true;
}
}
return false;
},
/**
* Draws a background for the object big as its untransformed dimensions
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_renderBackground: function(ctx) {
if (!this.backgroundColor) {
return;
}
var dim = this._getNonTransformedDimensions();
ctx.fillStyle = this.backgroundColor;
ctx.fillRect(
-dim.x / 2,
-dim.y / 2,
dim.x,
dim.y
);
// if there is background color no other shadows
// should be casted
this._removeShadow(ctx);
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_setOpacity: function(ctx) {
if (this.group && !this.group._transformDone) {
ctx.globalAlpha = this.getObjectOpacity();
}
else {
ctx.globalAlpha *= this.opacity;
}
},
_setStrokeStyles: function(ctx, decl) {
if (decl.stroke) {
ctx.lineWidth = decl.strokeWidth;
ctx.lineCap = decl.strokeLineCap;
ctx.lineDashOffset = decl.strokeDashOffset;
ctx.lineJoin = decl.strokeLineJoin;
ctx.miterLimit = decl.strokeMiterLimit;
ctx.strokeStyle = decl.stroke.toLive
? decl.stroke.toLive(ctx, this)
: decl.stroke;
}
},
_setFillStyles: function(ctx, decl) {
if (decl.fill) {
ctx.fillStyle = decl.fill.toLive
? decl.fill.toLive(ctx, this)
: decl.fill;
}
},
_setClippingProperties: function(ctx) {
ctx.globalAlpha = 1;
ctx.strokeStyle = 'transparent';
ctx.fillStyle = '#000000';
},
/**
* @private
* Sets line dash
* @param {CanvasRenderingContext2D} ctx Context to set the dash line on
* @param {Array} dashArray array representing dashes
* @param {Function} alternative function to call if browser does not support lineDash
*/
_setLineDash: function(ctx, dashArray, alternative) {
if (!dashArray) {
return;
}
// Spec requires the concatenation of two copies the dash list when the number of elements is odd
if (1 & dashArray.length) {
dashArray.push.apply(dashArray, dashArray);
}
if (supportsLineDash) {
ctx.setLineDash(dashArray);
}
else {
alternative && alternative(ctx);
}
if (this.strokeUniform) {
ctx.setLineDash(ctx.getLineDash().map(function(value) { return value * ctx.lineWidth; }));
}
},
/**
* Renders controls and borders for the object
* @param {CanvasRenderingContext2D} ctx Context to render on
* @param {Object} [styleOverride] properties to override the object style
*/
_renderControls: function(ctx, styleOverride) {
var vpt = this.getViewportTransform(),
matrix = this.calcTransformMatrix(),
options, drawBorders, drawControls;
styleOverride = styleOverride || { };
drawBorders = typeof styleOverride.hasBorders !== 'undefined' ? styleOverride.hasBorders : this.hasBorders;
drawControls = typeof styleOverride.hasControls !== 'undefined' ? styleOverride.hasControls : this.hasControls;
matrix = fabric.util.multiplyTransformMatrices(vpt, matrix);
options = fabric.util.qrDecompose(matrix);
ctx.save();
ctx.translate(options.translateX, options.translateY);
ctx.lineWidth = 1 * this.borderScaleFactor;
if (!this.group) {
ctx.globalAlpha = this.isMoving ? this.borderOpacityWhenMoving : 1;
}
if (styleOverride.forActiveSelection) {
ctx.rotate(degreesToRadians(options.angle));
drawBorders && this.drawBordersInGroup(ctx, options, styleOverride);
}
else {
ctx.rotate(degreesToRadians(this.angle));
drawBorders && this.drawBorders(ctx, styleOverride);
}
drawControls && this.drawControls(ctx, styleOverride);
ctx.restore();
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_setShadow: function(ctx) {
if (!this.shadow) {
return;
}
var shadow = this.shadow, canvas = this.canvas, scaling,
multX = (canvas && canvas.viewportTransform[0]) || 1,
multY = (canvas && canvas.viewportTransform[3]) || 1;
if (shadow.nonScaling) {
scaling = { scaleX: 1, scaleY: 1 };
}
else {
scaling = this.getObjectScaling();
}
if (canvas && canvas._isRetinaScaling()) {
multX *= fabric.devicePixelRatio;
multY *= fabric.devicePixelRatio;
}
ctx.shadowColor = shadow.color;
ctx.shadowBlur = shadow.blur * fabric.browserShadowBlurConstant *
(multX + multY) * (scaling.scaleX + scaling.scaleY) / 4;
ctx.shadowOffsetX = shadow.offsetX * multX * scaling.scaleX;
ctx.shadowOffsetY = shadow.offsetY * multY * scaling.scaleY;
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_removeShadow: function(ctx) {
if (!this.shadow) {
return;
}
ctx.shadowColor = '';
ctx.shadowBlur = ctx.shadowOffsetX = ctx.shadowOffsetY = 0;
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
* @param {Object} filler fabric.Pattern or fabric.Gradient
* @return {Object} offset.offsetX offset for text rendering
* @return {Object} offset.offsetY offset for text rendering
*/
_applyPatternGradientTransform: function(ctx, filler) {
if (!filler || !filler.toLive) {
return { offsetX: 0, offsetY: 0 };
}
var t = filler.gradientTransform || filler.patternTransform;
var offsetX = -this.width / 2 + filler.offsetX || 0,
offsetY = -this.height / 2 + filler.offsetY || 0;
if (filler.gradientUnits === 'percentage') {
ctx.transform(this.width, 0, 0, this.height, offsetX, offsetY);
}
else {
ctx.transform(1, 0, 0, 1, offsetX, offsetY);
}
if (t) {
ctx.transform(t[0], t[1], t[2], t[3], t[4], t[5]);
}
return { offsetX: offsetX, offsetY: offsetY };
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_renderPaintInOrder: function(ctx) {
if (this.paintFirst === 'stroke') {
this._renderStroke(ctx);
this._renderFill(ctx);
}
else {
this._renderFill(ctx);
this._renderStroke(ctx);
}
},
/**
* @private
* function that actually render something on the context.
* empty here to allow Obects to work on tests to benchmark fabric functionalites
* not related to rendering
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_render: function(/* ctx */) {
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_renderFill: function(ctx) {
if (!this.fill) {
return;
}
ctx.save();
this._applyPatternGradientTransform(ctx, this.fill);
if (this.fillRule === 'evenodd') {
ctx.fill('evenodd');
}
else {
ctx.fill();
}
ctx.restore();
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_renderStroke: function(ctx) {
if (!this.stroke || this.strokeWidth === 0) {
return;
}
if (this.shadow && !this.shadow.affectStroke) {
this._removeShadow(ctx);
}
ctx.save();
if (this.strokeUniform) {
ctx.scale(1 / this.scaleX, 1 / this.scaleY);
}
this._setLineDash(ctx, this.strokeDashArray, this._renderDashedStroke);
if (this.stroke.toLive && this.stroke.gradientUnits === 'percentage') {
// need to transform gradient in a pattern.
// this is a slow process. If you are hitting this codepath, and the object
// is not using caching, you should consider switching it on.
// we need a canvas as big as the current object caching canvas.
this._applyPatternForTransformedGradient(ctx, this.stroke);
}
else {
this._applyPatternGradientTransform(ctx, this.stroke);
}
ctx.stroke();
ctx.restore();
},
/**
* This function try to patch the missing gradientTransform on canvas gradients.
* transforming a context to transform the gradient, is going to transform the stroke too.
* we want to transform the gradient but not the stroke operation, so we create
* a transformed gradient on a pattern and then we use the pattern instead of the gradient.
* this method has drwabacks: is slow, is in low resolution, needs a patch for when the size
* is limited.
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
* @param {fabric.Gradient} filler a fabric gradient instance
*/
_applyPatternForTransformedGradient: function(ctx, filler) {
var dims = this._limitCacheSize(this._getCacheCanvasDimensions()),
pCanvas = fabric.util.createCanvasElement(), pCtx, retinaScaling = this.canvas.getRetinaScaling(),
width = dims.x / this.scaleX / retinaScaling, height = dims.y / this.scaleY / retinaScaling;
pCanvas.width = width;
pCanvas.height = height;
pCtx = pCanvas.getContext('2d');
pCtx.beginPath(); pCtx.moveTo(0, 0); pCtx.lineTo(width, 0); pCtx.lineTo(width, height);
pCtx.lineTo(0, height); pCtx.closePath();
pCtx.translate(width / 2, height / 2);
pCtx.scale(
dims.zoomX / this.scaleX / retinaScaling,
dims.zoomY / this.scaleY / retinaScaling
);
this._applyPatternGradientTransform(pCtx, filler);
pCtx.fillStyle = filler.toLive(ctx);
pCtx.fill();
ctx.translate(-this.width / 2 - this.strokeWidth / 2, -this.height / 2 - this.strokeWidth / 2);
ctx.scale(
retinaScaling * this.scaleX / dims.zoomX,
retinaScaling * this.scaleY / dims.zoomY
);
ctx.strokeStyle = pCtx.createPattern(pCanvas, 'no-repeat');
},
/**
* This function is an helper for svg import. it returns the center of the object in the svg
* untransformed coordinates
* @private
* @return {Object} center point from element coordinates
*/
_findCenterFromElement: function() {
return { x: this.left + this.width / 2, y: this.top + this.height / 2 };
},
/**
* This function is an helper for svg import. it decompose the transformMatrix
* and assign properties to object.
* untransformed coordinates
* @private
* @chainable
*/
_assignTransformMatrixProps: function() {
if (this.transformMatrix) {
var options = fabric.util.qrDecompose(this.transformMatrix);
this.flipX = false;
this.flipY = false;
this.set('scaleX', options.scaleX);
this.set('scaleY', options.scaleY);
this.angle = options.angle;
this.skewX = options.skewX;
this.skewY = 0;
}
},
/**
* This function is an helper for svg import. it removes the transform matrix
* and set to object properties that fabricjs can handle
* @private
* @param {Object} preserveAspectRatioOptions
* @return {thisArg}
*/
_removeTransformMatrix: function(preserveAspectRatioOptions) {
var center = this._findCenterFromElement();
if (this.transformMatrix) {
this._assignTransformMatrixProps();
center = fabric.util.transformPoint(center, this.transformMatrix);
}
this.transformMatrix = null;
if (preserveAspectRatioOptions) {
this.scaleX *= preserveAspectRatioOptions.scaleX;
this.scaleY *= preserveAspectRatioOptions.scaleY;
this.cropX = preserveAspectRatioOptions.cropX;
this.cropY = preserveAspectRatioOptions.cropY;
center.x += preserveAspectRatioOptions.offsetLeft;
center.y += preserveAspectRatioOptions.offsetTop;
this.width = preserveAspectRatioOptions.width;
this.height = preserveAspectRatioOptions.height;
}
this.setPositionByOrigin(center, 'center', 'center');
},
/**
* Clones an instance, using a callback method will work for every object.
* @param {Function} callback Callback is invoked with a clone as a first argument
* @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output
*/
clone: function(callback, propertiesToInclude) {
var objectForm = this.toObject(propertiesToInclude);
if (this.constructor.fromObject) {
this.constructor.fromObject(objectForm, callback);
}
else {
fabric.Object._fromObject('Object', objectForm, callback);
}
},
/**
* Creates an instance of fabric.Image out of an object
* could make use of both toDataUrl or toCanvasElement.
* @param {Function} callback callback, invoked with an instance as a first argument
* @param {Object} [options] for clone as image, passed to toDataURL
* @param {String} [options.format=png] The format of the output image. Either "jpeg" or "png"
* @param {Number} [options.quality=1] Quality level (0..1). Only used for jpeg.
* @param {Number} [options.multiplier=1] Multiplier to scale by
* @param {Number} [options.left] Cropping left offset. Introduced in v1.2.14
* @param {Number} [options.top] Cropping top offset. Introduced in v1.2.14
* @param {Number} [options.width] Cropping width. Introduced in v1.2.14
* @param {Number} [options.height] Cropping height. Introduced in v1.2.14
* @param {Boolean} [options.enableRetinaScaling] Enable retina scaling for clone image. Introduce in 1.6.4
* @param {Boolean} [options.withoutTransform] Remove current object transform ( no scale , no angle, no flip, no skew ). Introduced in 2.3.4
* @param {Boolean} [options.withoutShadow] Remove current object shadow. Introduced in 2.4.2
* @return {fabric.Object} thisArg
*/
cloneAsImage: function(callback, options) {
var canvasEl = this.toCanvasElement(options);
if (callback) {
callback(new fabric.Image(canvasEl));
}
return this;
},
/**
* Converts an object into a HTMLCanvas element
* @param {Object} options Options object
* @param {Number} [options.multiplier=1] Multiplier to scale by
* @param {Number} [options.left] Cropping left offset. Introduced in v1.2.14
* @param {Number} [options.top] Cropping top offset. Introduced in v1.2.14
* @param {Number} [options.width] Cropping width. Introduced in v1.2.14
* @param {Number} [options.height] Cropping height. Introduced in v1.2.14
* @param {Boolean} [options.enableRetinaScaling] Enable retina scaling for clone image. Introduce in 1.6.4
* @param {Boolean} [options.withoutTransform] Remove current object transform ( no scale , no angle, no flip, no skew ). Introduced in 2.3.4
* @param {Boolean} [options.withoutShadow] Remove current object shadow. Introduced in 2.4.2
* @return {String} Returns a data: URL containing a representation of the object in the format specified by options.format
*/
toCanvasElement: function(options) {
options || (options = { });
var utils = fabric.util, origParams = utils.saveObjectTransform(this),
originalShadow = this.shadow, abs = Math.abs,
multiplier = (options.multiplier || 1) * (options.enableRetinaScaling ? fabric.devicePixelRatio : 1);
if (options.withoutTransform) {
utils.resetObjectTransform(this);
}
if (options.withoutShadow) {
this.shadow = null;
}
var el = fabric.util.createCanvasElement(),
// skip canvas zoom and calculate with setCoords now.
boundingRect = this.getBoundingRect(true, true),
shadow = this.shadow, scaling,
shadowOffset = { x: 0, y: 0 }, shadowBlur;
if (shadow) {
shadowBlur = shadow.blur;
if (shadow.nonScaling) {
scaling = { scaleX: 1, scaleY: 1 };
}
else {
scaling = this.getObjectScaling();
}
shadowOffset.x = 2 * Math.round(abs(shadow.offsetX) + shadowBlur) * (abs(scaling.scaleX));
shadowOffset.y = 2 * Math.round(abs(shadow.offsetY) + shadowBlur) * (abs(scaling.scaleY));
}
el.width = boundingRect.width + shadowOffset.x;
el.height = boundingRect.height + shadowOffset.y;
el.width += el.width % 2 ? 2 - el.width % 2 : 0;
el.height += el.height % 2 ? 2 - el.height % 2 : 0;
var canvas = new fabric.StaticCanvas(el, {
enableRetinaScaling: false,
renderOnAddRemove: false,
skipOffscreen: false,
});
if (options.format === 'jpeg') {
canvas.backgroundColor = '#fff';
}
this.setPositionByOrigin(new fabric.Point(canvas.width / 2, canvas.height / 2), 'center', 'center');
var originalCanvas = this.canvas;
canvas.add(this);
var canvasEl = canvas.toCanvasElement(multiplier || 1, options);
this.shadow = originalShadow;
this.canvas = originalCanvas;
this.set(origParams).setCoords();
// canvas.dispose will call image.dispose that will nullify the elements
// since this canvas is a simple element for the process, we remove references
// to objects in this way in order to avoid object trashing.
canvas._objects = [];
canvas.dispose();
canvas = null;
return canvasEl;
},
/**
* Converts an object into a data-url-like string
* @param {Object} options Options object
* @param {String} [options.format=png] The format of the output image. Either "jpeg" or "png"
* @param {Number} [options.quality=1] Quality level (0..1). Only used for jpeg.
* @param {Number} [options.multiplier=1] Multiplier to scale by
* @param {Number} [options.left] Cropping left offset. Introduced in v1.2.14
* @param {Number} [options.top] Cropping top offset. Introduced in v1.2.14
* @param {Number} [options.width] Cropping width. Introduced in v1.2.14
* @param {Number} [options.height] Cropping height. Introduced in v1.2.14
* @param {Boolean} [options.enableRetinaScaling] Enable retina scaling for clone image. Introduce in 1.6.4
* @param {Boolean} [options.withoutTransform] Remove current object transform ( no scale , no angle, no flip, no skew ). Introduced in 2.3.4
* @param {Boolean} [options.withoutShadow] Remove current object shadow. Introduced in 2.4.2
* @return {String} Returns a data: URL containing a representation of the object in the format specified by options.format
*/
toDataURL: function(options) {
options || (options = { });
return fabric.util.toDataURL(this.toCanvasElement(options), options.format || 'png', options.quality || 1);
},
/**
* Returns true if specified type is identical to the type of an instance
* @param {String} type Type to check against
* @return {Boolean}
*/
isType: function(type) {
return this.type === type;
},
/**
* Returns complexity of an instance
* @return {Number} complexity of this instance (is 1 unless subclassed)
*/
complexity: function() {
return 1;
},
/**
* Returns a JSON representation of an instance
* @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output
* @return {Object} JSON
*/
toJSON: function(propertiesToInclude) {
// delegate, not alias
return this.toObject(propertiesToInclude);
},
/**
* Sets gradient (fill or stroke) of an object
* percentages for x1,x2,y1,y2,r1,r2 together with gradientUnits 'pixels', are not supported.
* <b>Backwards incompatibility note:</b> This method was named "setGradientFill" until v1.1.0
* @param {String} property Property name 'stroke' or 'fill'
* @param {Object} [options] Options object
* @param {String} [options.type] Type of gradient 'radial' or 'linear'
* @param {Number} [options.x1=0] x-coordinate of start point
* @param {Number} [options.y1=0] y-coordinate of start point
* @param {Number} [options.x2=0] x-coordinate of end point
* @param {Number} [options.y2=0] y-coordinate of end point
* @param {Number} [options.r1=0] Radius of start point (only for radial gradients)
* @param {Number} [options.r2=0] Radius of end point (only for radial gradients)
* @param {Object} [options.colorStops] Color stops object eg. {0: 'ff0000', 1: '000000'}
* @param {Object} [options.gradientTransform] transformMatrix for gradient
* @return {fabric.Object} thisArg
* @chainable
* @deprecated since 3.4.0
* @see {@link http://jsfiddle.net/fabricjs/58y8b/|jsFiddle demo}
* @example <caption>Set linear gradient</caption>
* object.setGradient('fill', {
* type: 'linear',
* x1: -object.width / 2,
* y1: 0,
* x2: object.width / 2,
* y2: 0,
* colorStops: {
* 0: 'red',
* 0.5: '#005555',
* 1: 'rgba(0,0,255,0.5)'
* }
* });
* canvas.renderAll();
* @example <caption>Set radial gradient</caption>
* object.setGradient('fill', {
* type: 'radial',
* x1: 0,
* y1: 0,
* x2: 0,
* y2: 0,
* r1: object.width / 2,
* r2: 10,
* colorStops: {
* 0: 'red',
* 0.5: '#005555',
* 1: 'rgba(0,0,255,0.5)'
* }
* });
* canvas.renderAll();
*/
setGradient: function(property, options) {
options || (options = { });
var gradient = { colorStops: [] };
gradient.type = options.type || (options.r1 || options.r2 ? 'radial' : 'linear');
gradient.coords = {
x1: options.x1,
y1: options.y1,
x2: options.x2,
y2: options.y2
};
gradient.gradientUnits = options.gradientUnits || 'pixels';
if (options.r1 || options.r2) {
gradient.coords.r1 = options.r1;
gradient.coords.r2 = options.r2;
}
gradient.gradientTransform = options.gradientTransform;
fabric.Gradient.prototype.addColorStop.call(gradient, options.colorStops);
return this.set(property, fabric.Gradient.forObject(this, gradient));
},
/**
* Sets pattern fill of an object
* @param {Object} options Options object
* @param {(String|HTMLImageElement)} options.source Pattern source
* @param {String} [options.repeat=repeat] Repeat property of a pattern (one of repeat, repeat-x, repeat-y or no-repeat)
* @param {Number} [options.offsetX=0] Pattern horizontal offset from object's left/top corner
* @param {Number} [options.offsetY=0] Pattern vertical offset from object's left/top corner
* @param {Function} [callback] Callback to invoke when image set as a pattern
* @return {fabric.Object} thisArg
* @chainable
* @see {@link http://jsfiddle.net/fabricjs/QT3pa/|jsFiddle demo}
* @example <caption>Set pattern</caption>
* object.setPatternFill({
* source: 'http://fabricjs.com/assets/escheresque_ste.png',
* repeat: 'repeat'
* },canvas.renderAll.bind(canvas));
*/
setPatternFill: function(options, callback) {
return this.set('fill', new fabric.Pattern(options, callback));
},
/**
* Sets {@link fabric.Object#shadow|shadow} of an object
* @param {Object|String} [options] Options object or string (e.g. "2px 2px 10px rgba(0,0,0,0.2)")
* @param {String} [options.color=rgb(0,0,0)] Shadow color
* @param {Number} [options.blur=0] Shadow blur
* @param {Number} [options.offsetX=0] Shadow horizontal offset
* @param {Number} [options.offsetY=0] Shadow vertical offset
* @return {fabric.Object} thisArg
* @chainable
* @see {@link http://jsfiddle.net/fabricjs/7gvJG/|jsFiddle demo}
* @example <caption>Set shadow with string notation</caption>
* object.setShadow('2px 2px 10px rgba(0,0,0,0.2)');
* canvas.renderAll();
* @example <caption>Set shadow with object notation</caption>
* object.setShadow({
* color: 'red',
* blur: 10,
* offsetX: 20,
* offsetY: 20
* });
* canvas.renderAll();
*/
setShadow: function(options) {
return this.set('shadow', options ? new fabric.Shadow(options) : null);
},
/**
* Sets "color" of an instance (alias of `set('fill', &hellip;)`)
* @param {String} color Color value
* @return {fabric.Object} thisArg
* @chainable
*/
setColor: function(color) {
this.set('fill', color);
return this;
},
/**
* Sets "angle" of an instance with centered rotation
* @param {Number} angle Angle value (in degrees)
* @return {fabric.Object} thisArg
* @chainable
*/
rotate: function(angle) {
var shouldCenterOrigin = (this.originX !== 'center' || this.originY !== 'center') && this.centeredRotation;
if (shouldCenterOrigin) {
this._setOriginToCenter();
}
this.set('angle', angle);
if (shouldCenterOrigin) {
this._resetOrigin();
}
return this;
},
/**
* Centers object horizontally on canvas to which it was added last.
* You might need to call `setCoords` on an object after centering, to update controls area.
* @return {fabric.Object} thisArg
* @chainable
*/
centerH: function () {
this.canvas && this.canvas.centerObjectH(this);
return this;
},
/**
* Centers object horizontally on current viewport of canvas to which it was added last.
* You might need to call `setCoords` on an object after centering, to update controls area.
* @return {fabric.Object} thisArg
* @chainable
*/
viewportCenterH: function () {
this.canvas && this.canvas.viewportCenterObjectH(this);
return this;
},
/**
* Centers object vertically on canvas to which it was added last.
* You might need to call `setCoords` on an object after centering, to update controls area.
* @return {fabric.Object} thisArg
* @chainable
*/
centerV: function () {
this.canvas && this.canvas.centerObjectV(this);
return this;
},
/**
* Centers object vertically on current viewport of canvas to which it was added last.
* You might need to call `setCoords` on an object after centering, to update controls area.
* @return {fabric.Object} thisArg
* @chainable
*/
viewportCenterV: function () {
this.canvas && this.canvas.viewportCenterObjectV(this);
return this;
},
/**
* Centers object vertically and horizontally on canvas to which is was added last
* You might need to call `setCoords` on an object after centering, to update controls area.
* @return {fabric.Object} thisArg
* @chainable
*/
center: function () {
this.canvas && this.canvas.centerObject(this);
return this;
},
/**
* Centers object on current viewport of canvas to which it was added last.
* You might need to call `setCoords` on an object after centering, to update controls area.
* @return {fabric.Object} thisArg
* @chainable
*/
viewportCenter: function () {
this.canvas && this.canvas.viewportCenterObject(this);
return this;
},
/**
* Returns coordinates of a pointer relative to an object
* @param {Event} e Event to operate upon
* @param {Object} [pointer] Pointer to operate upon (instead of event)
* @return {Object} Coordinates of a pointer (x, y)
*/
getLocalPointer: function(e, pointer) {
pointer = pointer || this.canvas.getPointer(e);
var pClicked = new fabric.Point(pointer.x, pointer.y),
objectLeftTop = this._getLeftTopCoords();
if (this.angle) {
pClicked = fabric.util.rotatePoint(
pClicked, objectLeftTop, degreesToRadians(-this.angle));
}
return {
x: pClicked.x - objectLeftTop.x,
y: pClicked.y - objectLeftTop.y
};
},
/**
* Sets canvas globalCompositeOperation for specific object
* custom composition operation for the particular object can be specified using globalCompositeOperation property
* @param {CanvasRenderingContext2D} ctx Rendering canvas context
*/
_setupCompositeOperation: function (ctx) {
if (this.globalCompositeOperation) {
ctx.globalCompositeOperation = this.globalCompositeOperation;
}
}
});
fabric.util.createAccessors && fabric.util.createAccessors(fabric.Object);
extend(fabric.Object.prototype, fabric.Observable);
/**
* Defines the number of fraction digits to use when serializing object values.
* You can use it to increase/decrease precision of such values like left, top, scaleX, scaleY, etc.
* @static
* @memberOf fabric.Object
* @constant
* @type Number
*/
fabric.Object.NUM_FRACTION_DIGITS = 2;
fabric.Object._fromObject = function(className, object, callback, extraParam) {
var klass = fabric[className];
object = clone(object, true);
fabric.util.enlivenPatterns([object.fill, object.stroke], function(patterns) {
if (typeof patterns[0] !== 'undefined') {
object.fill = patterns[0];
}
if (typeof patterns[1] !== 'undefined') {
object.stroke = patterns[1];
}
fabric.util.enlivenObjects([object.clipPath], function(enlivedProps) {
object.clipPath = enlivedProps[0];
var instance = extraParam ? new klass(object[extraParam], object) : new klass(object);
callback && callback(instance);
});
});
};
/**
* Unique id used internally when creating SVG elements
* @static
* @memberOf fabric.Object
* @type Number
*/
fabric.Object.__uid = 0;
})(typeof exports !== 'undefined' ? exports : this);
(function() {
var degreesToRadians = fabric.util.degreesToRadians,
originXOffset = {
left: -0.5,
center: 0,
right: 0.5
},
originYOffset = {
top: -0.5,
center: 0,
bottom: 0.5
};
fabric.util.object.extend(fabric.Object.prototype, /** @lends fabric.Object.prototype */ {
/**
* Translates the coordinates from a set of origin to another (based on the object's dimensions)
* @param {fabric.Point} point The point which corresponds to the originX and originY params
* @param {String} fromOriginX Horizontal origin: 'left', 'center' or 'right'
* @param {String} fromOriginY Vertical origin: 'top', 'center' or 'bottom'
* @param {String} toOriginX Horizontal origin: 'left', 'center' or 'right'
* @param {String} toOriginY Vertical origin: 'top', 'center' or 'bottom'
* @return {fabric.Point}
*/
translateToGivenOrigin: function(point, fromOriginX, fromOriginY, toOriginX, toOriginY) {
var x = point.x,
y = point.y,
offsetX, offsetY, dim;
if (typeof fromOriginX === 'string') {
fromOriginX = originXOffset[fromOriginX];
}
else {
fromOriginX -= 0.5;
}
if (typeof toOriginX === 'string') {
toOriginX = originXOffset[toOriginX];
}
else {
toOriginX -= 0.5;
}
offsetX = toOriginX - fromOriginX;
if (typeof fromOriginY === 'string') {
fromOriginY = originYOffset[fromOriginY];
}
else {
fromOriginY -= 0.5;
}
if (typeof toOriginY === 'string') {
toOriginY = originYOffset[toOriginY];
}
else {
toOriginY -= 0.5;
}
offsetY = toOriginY - fromOriginY;
if (offsetX || offsetY) {
dim = this._getTransformedDimensions();
x = point.x + offsetX * dim.x;
y = point.y + offsetY * dim.y;
}
return new fabric.Point(x, y);
},
/**
* Translates the coordinates from origin to center coordinates (based on the object's dimensions)
* @param {fabric.Point} point The point which corresponds to the originX and originY params
* @param {String} originX Horizontal origin: 'left', 'center' or 'right'
* @param {String} originY Vertical origin: 'top', 'center' or 'bottom'
* @return {fabric.Point}
*/
translateToCenterPoint: function(point, originX, originY) {
var p = this.translateToGivenOrigin(point, originX, originY, 'center', 'center');
if (this.angle) {
return fabric.util.rotatePoint(p, point, degreesToRadians(this.angle));
}
return p;
},
/**
* Translates the coordinates from center to origin coordinates (based on the object's dimensions)
* @param {fabric.Point} center The point which corresponds to center of the object
* @param {String} originX Horizontal origin: 'left', 'center' or 'right'
* @param {String} originY Vertical origin: 'top', 'center' or 'bottom'
* @return {fabric.Point}
*/
translateToOriginPoint: function(center, originX, originY) {
var p = this.translateToGivenOrigin(center, 'center', 'center', originX, originY);
if (this.angle) {
return fabric.util.rotatePoint(p, center, degreesToRadians(this.angle));
}
return p;
},
/**
* Returns the real center coordinates of the object
* @return {fabric.Point}
*/
getCenterPoint: function() {
var leftTop = new fabric.Point(this.left, this.top);
return this.translateToCenterPoint(leftTop, this.originX, this.originY);
},
/**
* Returns the coordinates of the object based on center coordinates
* @param {fabric.Point} point The point which corresponds to the originX and originY params
* @return {fabric.Point}
*/
// getOriginPoint: function(center) {
// return this.translateToOriginPoint(center, this.originX, this.originY);
// },
/**
* Returns the coordinates of the object as if it has a different origin
* @param {String} originX Horizontal origin: 'left', 'center' or 'right'
* @param {String} originY Vertical origin: 'top', 'center' or 'bottom'
* @return {fabric.Point}
*/
getPointByOrigin: function(originX, originY) {
var center = this.getCenterPoint();
return this.translateToOriginPoint(center, originX, originY);
},
/**
* Returns the point in local coordinates
* @param {fabric.Point} point The point relative to the global coordinate system
* @param {String} originX Horizontal origin: 'left', 'center' or 'right'
* @param {String} originY Vertical origin: 'top', 'center' or 'bottom'
* @return {fabric.Point}
*/
toLocalPoint: function(point, originX, originY) {
var center = this.getCenterPoint(),
p, p2;
if (typeof originX !== 'undefined' && typeof originY !== 'undefined' ) {
p = this.translateToGivenOrigin(center, 'center', 'center', originX, originY);
}
else {
p = new fabric.Point(this.left, this.top);
}
p2 = new fabric.Point(point.x, point.y);
if (this.angle) {
p2 = fabric.util.rotatePoint(p2, center, -degreesToRadians(this.angle));
}
return p2.subtractEquals(p);
},
/**
* Returns the point in global coordinates
* @param {fabric.Point} The point relative to the local coordinate system
* @return {fabric.Point}
*/
// toGlobalPoint: function(point) {
// return fabric.util.rotatePoint(point, this.getCenterPoint(), degreesToRadians(this.angle)).addEquals(new fabric.Point(this.left, this.top));
// },
/**
* Sets the position of the object taking into consideration the object's origin
* @param {fabric.Point} pos The new position of the object
* @param {String} originX Horizontal origin: 'left', 'center' or 'right'
* @param {String} originY Vertical origin: 'top', 'center' or 'bottom'
* @return {void}
*/
setPositionByOrigin: function(pos, originX, originY) {
var center = this.translateToCenterPoint(pos, originX, originY),
position = this.translateToOriginPoint(center, this.originX, this.originY);
this.set('left', position.x);
this.set('top', position.y);
},
/**
* @param {String} to One of 'left', 'center', 'right'
*/
adjustPosition: function(to) {
var angle = degreesToRadians(this.angle),
hypotFull = this.getScaledWidth(),
xFull = fabric.util.cos(angle) * hypotFull,
yFull = fabric.util.sin(angle) * hypotFull,
offsetFrom, offsetTo;
//TODO: this function does not consider mixed situation like top, center.
if (typeof this.originX === 'string') {
offsetFrom = originXOffset[this.originX];
}
else {
offsetFrom = this.originX - 0.5;
}
if (typeof to === 'string') {
offsetTo = originXOffset[to];
}
else {
offsetTo = to - 0.5;
}
this.left += xFull * (offsetTo - offsetFrom);
this.top += yFull * (offsetTo - offsetFrom);
this.setCoords();
this.originX = to;
},
/**
* Sets the origin/position of the object to it's center point
* @private
* @return {void}
*/
_setOriginToCenter: function() {
this._originalOriginX = this.originX;
this._originalOriginY = this.originY;
var center = this.getCenterPoint();
this.originX = 'center';
this.originY = 'center';
this.left = center.x;
this.top = center.y;
},
/**
* Resets the origin/position of the object to it's original origin
* @private
* @return {void}
*/
_resetOrigin: function() {
var originPoint = this.translateToOriginPoint(
this.getCenterPoint(),
this._originalOriginX,
this._originalOriginY);
this.originX = this._originalOriginX;
this.originY = this._originalOriginY;
this.left = originPoint.x;
this.top = originPoint.y;
this._originalOriginX = null;
this._originalOriginY = null;
},
/**
* @private
*/
_getLeftTopCoords: function() {
return this.translateToOriginPoint(this.getCenterPoint(), 'left', 'top');
},
});
})();
(function() {
function getCoords(coords) {
return [
new fabric.Point(coords.tl.x, coords.tl.y),
new fabric.Point(coords.tr.x, coords.tr.y),
new fabric.Point(coords.br.x, coords.br.y),
new fabric.Point(coords.bl.x, coords.bl.y)
];
}
var degreesToRadians = fabric.util.degreesToRadians,
multiplyMatrices = fabric.util.multiplyTransformMatrices,
transformPoint = fabric.util.transformPoint;
fabric.util.object.extend(fabric.Object.prototype, /** @lends fabric.Object.prototype */ {
/**
* Describe object's corner position in canvas element coordinates.
* properties are tl,mt,tr,ml,mr,bl,mb,br,mtr for the main controls.
* each property is an object with x, y and corner.
* The `corner` property contains in a similar manner the 4 points of the
* interactive area of the corner.
* The coordinates depends from this properties: width, height, scaleX, scaleY
* skewX, skewY, angle, strokeWidth, viewportTransform, top, left, padding.
* The coordinates get updated with @method setCoords.
* You can calculate them without updating with @method calcCoords;
* @memberOf fabric.Object.prototype
*/
oCoords: null,
/**
* Describe object's corner position in canvas object absolute coordinates
* properties are tl,tr,bl,br and describe the four main corner.
* each property is an object with x, y, instance of Fabric.Point.
* The coordinates depends from this properties: width, height, scaleX, scaleY
* skewX, skewY, angle, strokeWidth, top, left.
* Those coordinates are useful to understand where an object is. They get updated
* with oCoords but they do not need to be updated when zoom or panning change.
* The coordinates get updated with @method setCoords.
* You can calculate them without updating with @method calcCoords(true);
* @memberOf fabric.Object.prototype
*/
aCoords: null,
/**
* storage for object transform matrix
*/
ownMatrixCache: null,
/**
* storage for object full transform matrix
*/
matrixCache: null,
/**
* return correct set of coordinates for intersection
*/
getCoords: function(absolute, calculate) {
if (!this.oCoords) {
this.setCoords();
}
var coords = absolute ? this.aCoords : this.oCoords;
return getCoords(calculate ? this.calcCoords(absolute) : coords);
},
/**
* Checks if object intersects with an area formed by 2 points
* @param {Object} pointTL top-left point of area
* @param {Object} pointBR bottom-right point of area
* @param {Boolean} [absolute] use coordinates without viewportTransform
* @param {Boolean} [calculate] use coordinates of current position instead of .oCoords
* @return {Boolean} true if object intersects with an area formed by 2 points
*/
intersectsWithRect: function(pointTL, pointBR, absolute, calculate) {
var coords = this.getCoords(absolute, calculate),
intersection = fabric.Intersection.intersectPolygonRectangle(
coords,
pointTL,
pointBR
);
return intersection.status === 'Intersection';
},
/**
* Checks if object intersects with another object
* @param {Object} other Object to test
* @param {Boolean} [absolute] use coordinates without viewportTransform
* @param {Boolean} [calculate] use coordinates of current position instead of .oCoords
* @return {Boolean} true if object intersects with another object
*/
intersectsWithObject: function(other, absolute, calculate) {
var intersection = fabric.Intersection.intersectPolygonPolygon(
this.getCoords(absolute, calculate),
other.getCoords(absolute, calculate)
);
return intersection.status === 'Intersection'
|| other.isContainedWithinObject(this, absolute, calculate)
|| this.isContainedWithinObject(other, absolute, calculate);
},
/**
* Checks if object is fully contained within area of another object
* @param {Object} other Object to test
* @param {Boolean} [absolute] use coordinates without viewportTransform
* @param {Boolean} [calculate] use coordinates of current position instead of .oCoords
* @return {Boolean} true if object is fully contained within area of another object
*/
isContainedWithinObject: function(other, absolute, calculate) {
var points = this.getCoords(absolute, calculate),
i = 0, lines = other._getImageLines(
calculate ? other.calcCoords(absolute) : absolute ? other.aCoords : other.oCoords
);
for (; i < 4; i++) {
if (!other.containsPoint(points[i], lines)) {
return false;
}
}
return true;
},
/**
* Checks if object is fully contained within area formed by 2 points
* @param {Object} pointTL top-left point of area
* @param {Object} pointBR bottom-right point of area
* @param {Boolean} [absolute] use coordinates without viewportTransform
* @param {Boolean} [calculate] use coordinates of current position instead of .oCoords
* @return {Boolean} true if object is fully contained within area formed by 2 points
*/
isContainedWithinRect: function(pointTL, pointBR, absolute, calculate) {
var boundingRect = this.getBoundingRect(absolute, calculate);
return (
boundingRect.left >= pointTL.x &&
boundingRect.left + boundingRect.width <= pointBR.x &&
boundingRect.top >= pointTL.y &&
boundingRect.top + boundingRect.height <= pointBR.y
);
},
/**
* Checks if point is inside the object
* @param {fabric.Point} point Point to check against
* @param {Object} [lines] object returned from @method _getImageLines
* @param {Boolean} [absolute] use coordinates without viewportTransform
* @param {Boolean} [calculate] use coordinates of current position instead of .oCoords
* @return {Boolean} true if point is inside the object
*/
containsPoint: function(point, lines, absolute, calculate) {
var lines = lines || this._getImageLines(
calculate ? this.calcCoords(absolute) : absolute ? this.aCoords : this.oCoords
),
xPoints = this._findCrossPoints(point, lines);
// if xPoints is odd then point is inside the object
return (xPoints !== 0 && xPoints % 2 === 1);
},
/**
* Checks if object is contained within the canvas with current viewportTransform
* the check is done stopping at first point that appears on screen
* @param {Boolean} [calculate] use coordinates of current position instead of .aCoords
* @return {Boolean} true if object is fully or partially contained within canvas
*/
isOnScreen: function(calculate) {
if (!this.canvas) {
return false;
}
var pointTL = this.canvas.vptCoords.tl, pointBR = this.canvas.vptCoords.br;
var points = this.getCoords(true, calculate), point;
for (var i = 0; i < 4; i++) {
point = points[i];
if (point.x <= pointBR.x && point.x >= pointTL.x && point.y <= pointBR.y && point.y >= pointTL.y) {
return true;
}
}
// no points on screen, check intersection with absolute coordinates
if (this.intersectsWithRect(pointTL, pointBR, true, calculate)) {
return true;
}
return this._containsCenterOfCanvas(pointTL, pointBR, calculate);
},
/**
* Checks if the object contains the midpoint between canvas extremities
* Does not make sense outside the context of isOnScreen and isPartiallyOnScreen
* @private
* @param {Fabric.Point} pointTL Top Left point
* @param {Fabric.Point} pointBR Top Right point
* @param {Boolean} calculate use coordinates of current position instead of .oCoords
* @return {Boolean} true if the object contains the point
*/
_containsCenterOfCanvas: function(pointTL, pointBR, calculate) {
// worst case scenario the object is so big that contains the screen
var centerPoint = { x: (pointTL.x + pointBR.x) / 2, y: (pointTL.y + pointBR.y) / 2 };
if (this.containsPoint(centerPoint, null, true, calculate)) {
return true;
}
return false;
},
/**
* Checks if object is partially contained within the canvas with current viewportTransform
* @param {Boolean} [calculate] use coordinates of current position instead of .oCoords
* @return {Boolean} true if object is partially contained within canvas
*/
isPartiallyOnScreen: function(calculate) {
if (!this.canvas) {
return false;
}
var pointTL = this.canvas.vptCoords.tl, pointBR = this.canvas.vptCoords.br;
if (this.intersectsWithRect(pointTL, pointBR, true, calculate)) {
return true;
}
return this._containsCenterOfCanvas(pointTL, pointBR, calculate);
},
/**
* Method that returns an object with the object edges in it, given the coordinates of the corners
* @private
* @param {Object} oCoords Coordinates of the object corners
*/
_getImageLines: function(oCoords) {
return {
topline: {
o: oCoords.tl,
d: oCoords.tr
},
rightline: {
o: oCoords.tr,
d: oCoords.br
},
bottomline: {
o: oCoords.br,
d: oCoords.bl
},
leftline: {
o: oCoords.bl,
d: oCoords.tl
}
};
},
/**
* Helper method to determine how many cross points are between the 4 object edges
* and the horizontal line determined by a point on canvas
* @private
* @param {fabric.Point} point Point to check
* @param {Object} lines Coordinates of the object being evaluated
*/
// remove yi, not used but left code here just in case.
_findCrossPoints: function(point, lines) {
var b1, b2, a1, a2, xi, // yi,
xcount = 0,
iLine;
for (var lineKey in lines) {
iLine = lines[lineKey];
// optimisation 1: line below point. no cross
if ((iLine.o.y < point.y) && (iLine.d.y < point.y)) {
continue;
}
// optimisation 2: line above point. no cross
if ((iLine.o.y >= point.y) && (iLine.d.y >= point.y)) {
continue;
}
// optimisation 3: vertical line case
if ((iLine.o.x === iLine.d.x) && (iLine.o.x >= point.x)) {
xi = iLine.o.x;
// yi = point.y;
}
// calculate the intersection point
else {
b1 = 0;
b2 = (iLine.d.y - iLine.o.y) / (iLine.d.x - iLine.o.x);
a1 = point.y - b1 * point.x;
a2 = iLine.o.y - b2 * iLine.o.x;
xi = -(a1 - a2) / (b1 - b2);
// yi = a1 + b1 * xi;
}
// dont count xi < point.x cases
if (xi >= point.x) {
xcount += 1;
}
// optimisation 4: specific for square images
if (xcount === 2) {
break;
}
}
return xcount;
},
/**
* Returns coordinates of object's bounding rectangle (left, top, width, height)
* the box is intended as aligned to axis of canvas.
* @param {Boolean} [absolute] use coordinates without viewportTransform
* @param {Boolean} [calculate] use coordinates of current position instead of .oCoords / .aCoords
* @return {Object} Object with left, top, width, height properties
*/
getBoundingRect: function(absolute, calculate) {
var coords = this.getCoords(absolute, calculate);
return fabric.util.makeBoundingBoxFromPoints(coords);
},
/**
* Returns width of an object's bounding box counting transformations
* before 2.0 it was named getWidth();
* @return {Number} width value
*/
getScaledWidth: function() {
return this._getTransformedDimensions().x;
},
/**
* Returns height of an object bounding box counting transformations
* before 2.0 it was named getHeight();
* @return {Number} height value
*/
getScaledHeight: function() {
return this._getTransformedDimensions().y;
},
/**
* Makes sure the scale is valid and modifies it if necessary
* @private
* @param {Number} value
* @return {Number}
*/
_constrainScale: function(value) {
if (Math.abs(value) < this.minScaleLimit) {
if (value < 0) {
return -this.minScaleLimit;
}
else {
return this.minScaleLimit;
}
}
else if (value === 0) {
return 0.0001;
}
return value;
},
/**
* Scales an object (equally by x and y)
* @param {Number} value Scale factor
* @return {fabric.Object} thisArg
* @chainable
*/
scale: function(value) {
this._set('scaleX', value);
this._set('scaleY', value);
return this.setCoords();
},
/**
* Scales an object to a given width, with respect to bounding box (scaling by x/y equally)
* @param {Number} value New width value
* @param {Boolean} absolute ignore viewport
* @return {fabric.Object} thisArg
* @chainable
*/
scaleToWidth: function(value, absolute) {
// adjust to bounding rect factor so that rotated shapes would fit as well
var boundingRectFactor = this.getBoundingRect(absolute).width / this.getScaledWidth();
return this.scale(value / this.width / boundingRectFactor);
},
/**
* Scales an object to a given height, with respect to bounding box (scaling by x/y equally)
* @param {Number} value New height value
* @param {Boolean} absolute ignore viewport
* @return {fabric.Object} thisArg
* @chainable
*/
scaleToHeight: function(value, absolute) {
// adjust to bounding rect factor so that rotated shapes would fit as well
var boundingRectFactor = this.getBoundingRect(absolute).height / this.getScaledHeight();
return this.scale(value / this.height / boundingRectFactor);
},
/**
* Calculates and returns the .coords of an object.
* @return {Object} Object with tl, tr, br, bl ....
* @chainable
*/
calcCoords: function(absolute) {
var rotateMatrix = this._calcRotateMatrix(),
translateMatrix = this._calcTranslateMatrix(),
startMatrix = multiplyMatrices(translateMatrix, rotateMatrix),
vpt = this.getViewportTransform(),
finalMatrix = absolute ? startMatrix : multiplyMatrices(vpt, startMatrix),
dim = this._getTransformedDimensions(),
w = dim.x / 2, h = dim.y / 2,
tl = transformPoint({ x: -w, y: -h }, finalMatrix),
tr = transformPoint({ x: w, y: -h }, finalMatrix),
bl = transformPoint({ x: -w, y: h }, finalMatrix),
br = transformPoint({ x: w, y: h }, finalMatrix);
if (!absolute) {
var padding = this.padding, angle = degreesToRadians(this.angle),
cos = fabric.util.cos(angle), sin = fabric.util.sin(angle),
cosP = cos * padding, sinP = sin * padding, cosPSinP = cosP + sinP,
cosPMinusSinP = cosP - sinP;
if (padding) {
tl.x -= cosPMinusSinP;
tl.y -= cosPSinP;
tr.x += cosPSinP;
tr.y -= cosPMinusSinP;
bl.x -= cosPSinP;
bl.y += cosPMinusSinP;
br.x += cosPMinusSinP;
br.y += cosPSinP;
}
var ml = new fabric.Point((tl.x + bl.x) / 2, (tl.y + bl.y) / 2),
mt = new fabric.Point((tr.x + tl.x) / 2, (tr.y + tl.y) / 2),
mr = new fabric.Point((br.x + tr.x) / 2, (br.y + tr.y) / 2),
mb = new fabric.Point((br.x + bl.x) / 2, (br.y + bl.y) / 2),
mtr = new fabric.Point(mt.x + sin * this.rotatingPointOffset, mt.y - cos * this.rotatingPointOffset);
}
// if (!absolute) {
// var canvas = this.canvas;
// setTimeout(function() {
// canvas.contextTop.clearRect(0, 0, 700, 700);
// canvas.contextTop.fillStyle = 'green';
// canvas.contextTop.fillRect(mb.x, mb.y, 3, 3);
// canvas.contextTop.fillRect(bl.x, bl.y, 3, 3);
// canvas.contextTop.fillRect(br.x, br.y, 3, 3);
// canvas.contextTop.fillRect(tl.x, tl.y, 3, 3);
// canvas.contextTop.fillRect(tr.x, tr.y, 3, 3);
// canvas.contextTop.fillRect(ml.x, ml.y, 3, 3);
// canvas.contextTop.fillRect(mr.x, mr.y, 3, 3);
// canvas.contextTop.fillRect(mt.x, mt.y, 3, 3);
// canvas.contextTop.fillRect(mtr.x, mtr.y, 3, 3);
// }, 50);
// }
var coords = {
// corners
tl: tl, tr: tr, br: br, bl: bl,
};
if (!absolute) {
// middle
coords.ml = ml;
coords.mt = mt;
coords.mr = mr;
coords.mb = mb;
// rotating point
coords.mtr = mtr;
}
return coords;
},
/**
* Sets corner position coordinates based on current angle, width and height.
* See {@link https://github.com/kangax/fabric.js/wiki/When-to-call-setCoords|When-to-call-setCoords}
* @param {Boolean} [ignoreZoom] set oCoords with or without the viewport transform.
* @param {Boolean} [skipAbsolute] skip calculation of aCoords, useful in setViewportTransform
* @return {fabric.Object} thisArg
* @chainable
*/
setCoords: function(ignoreZoom, skipAbsolute) {
this.oCoords = this.calcCoords(ignoreZoom);
if (!skipAbsolute) {
this.aCoords = this.calcCoords(true);
}
// set coordinates of the draggable boxes in the corners used to scale/rotate the image
ignoreZoom || (this._setCornerCoords && this._setCornerCoords());
return this;
},
/**
* calculate rotation matrix of an object
* @return {Array} rotation matrix for the object
*/
_calcRotateMatrix: function() {
return fabric.util.calcRotateMatrix(this);
},
/**
* calculate the translation matrix for an object transform
* @return {Array} rotation matrix for the object
*/
_calcTranslateMatrix: function() {
var center = this.getCenterPoint();
return [1, 0, 0, 1, center.x, center.y];
},
transformMatrixKey: function(skipGroup) {
var sep = '_', prefix = '';
if (!skipGroup && this.group) {
prefix = this.group.transformMatrixKey(skipGroup) + sep;
};
return prefix + this.top + sep + this.left + sep + this.scaleX + sep + this.scaleY +
sep + this.skewX + sep + this.skewY + sep + this.angle + sep + this.originX + sep + this.originY +
sep + this.width + sep + this.height + sep + this.strokeWidth + this.flipX + this.flipY;
},
/**
* calculate transform matrix that represents the current transformations from the
* object's properties.
* @param {Boolean} [skipGroup] return transform matrix for object not counting parent transformations
* @return {Array} transform matrix for the object
*/
calcTransformMatrix: function(skipGroup) {
if (skipGroup) {
return this.calcOwnMatrix();
}
var key = this.transformMatrixKey(), cache = this.matrixCache || (this.matrixCache = {});
if (cache.key === key) {
return cache.value;
}
var matrix = this.calcOwnMatrix();
if (this.group) {
matrix = multiplyMatrices(this.group.calcTransformMatrix(), matrix);
}
cache.key = key;
cache.value = matrix;
return matrix;
},
/**
* calculate transform matrix that represents the current transformations from the
* object's properties, this matrix does not include the group transformation
* @return {Array} transform matrix for the object
*/
calcOwnMatrix: function() {
var key = this.transformMatrixKey(true), cache = this.ownMatrixCache || (this.ownMatrixCache = {});
if (cache.key === key) {
return cache.value;
}
var tMatrix = this._calcTranslateMatrix();
this.translateX = tMatrix[4];
this.translateY = tMatrix[5];
cache.key = key;
cache.value = fabric.util.composeMatrix(this);
return cache.value;
},
/*
* Calculate object dimensions from its properties
* @private
* @deprecated since 3.4.0, please use fabric.util._calcDimensionsTransformMatrix
* not including or including flipX, flipY to emulate the flipping boolean
* @return {Object} .x width dimension
* @return {Object} .y height dimension
*/
_calcDimensionsTransformMatrix: function(skewX, skewY, flipping) {
return fabric.util.calcDimensionsMatrix({
skewX: skewX,
skewY: skewY,
scaleX: this.scaleX * (flipping && this.flipX ? -1 : 1),
scaleY: this.scaleY * (flipping && this.flipY ? -1 : 1)
});
},
/*
* Calculate object dimensions from its properties
* @private
* @return {Object} .x width dimension
* @return {Object} .y height dimension
*/
_getNonTransformedDimensions: function() {
var strokeWidth = this.strokeWidth,
w = this.width + strokeWidth,
h = this.height + strokeWidth;
return { x: w, y: h };
},
/*
* Calculate object bounding box dimensions from its properties scale, skew.
* @param {Number} skewX, a value to override current skewX
* @param {Number} skewY, a value to override current skewY
* @private
* @return {Object} .x width dimension
* @return {Object} .y height dimension
*/
_getTransformedDimensions: function(skewX, skewY) {
if (typeof skewX === 'undefined') {
skewX = this.skewX;
}
if (typeof skewY === 'undefined') {
skewY = this.skewY;
}
var dimensions = this._getNonTransformedDimensions(), dimX, dimY,
noSkew = skewX === 0 && skewY === 0;
if (this.strokeUniform) {
dimX = this.width;
dimY = this.height;
}
else {
dimX = dimensions.x;
dimY = dimensions.y;
}
if (noSkew) {
return this._finalizeDimensions(dimX * this.scaleX, dimY * this.scaleY);
}
else {
dimX /= 2;
dimY /= 2;
}
var points = [
{
x: -dimX,
y: -dimY
},
{
x: dimX,
y: -dimY
},
{
x: -dimX,
y: dimY
},
{
x: dimX,
y: dimY
}],
transformMatrix = fabric.util.calcDimensionsMatrix({
scaleX: this.scaleX,
scaleY: this.scaleY,
skewX: this.skewX,
skewY: this.skewY,
}),
bbox = fabric.util.makeBoundingBoxFromPoints(points, transformMatrix);
return this._finalizeDimensions(bbox.width, bbox.height);
},
/*
* Calculate object bounding box dimensions from its properties scale, skew.
* @param Number width width of the bbox
* @param Number height height of the bbox
* @private
* @return {Object} .x finalized width dimension
* @return {Object} .y finalized height dimension
*/
_finalizeDimensions: function(width, height) {
return this.strokeUniform ?
{ x: width + this.strokeWidth, y: height + this.strokeWidth }
:
{ x: width, y: height };
},
/*
* Calculate object dimensions for controls, including padding and canvas zoom.
* private
*/
_calculateCurrentDimensions: function() {
var vpt = this.getViewportTransform(),
dim = this._getTransformedDimensions(),
p = fabric.util.transformPoint(dim, vpt, true);
return p.scalarAdd(2 * this.padding);
},
});
})();
fabric.util.object.extend(fabric.Object.prototype, /** @lends fabric.Object.prototype */ {
/**
* Moves an object to the bottom of the stack of drawn objects
* @return {fabric.Object} thisArg
* @chainable
*/
sendToBack: function() {
if (this.group) {
fabric.StaticCanvas.prototype.sendToBack.call(this.group, this);
}
else {
this.canvas.sendToBack(this);
}
return this;
},
/**
* Moves an object to the top of the stack of drawn objects
* @return {fabric.Object} thisArg
* @chainable
*/
bringToFront: function() {
if (this.group) {
fabric.StaticCanvas.prototype.bringToFront.call(this.group, this);
}
else {
this.canvas.bringToFront(this);
}
return this;
},
/**
* Moves an object down in stack of drawn objects
* @param {Boolean} [intersecting] If `true`, send object behind next lower intersecting object
* @return {fabric.Object} thisArg
* @chainable
*/
sendBackwards: function(intersecting) {
if (this.group) {
fabric.StaticCanvas.prototype.sendBackwards.call(this.group, this, intersecting);
}
else {
this.canvas.sendBackwards(this, intersecting);
}
return this;
},
/**
* Moves an object up in stack of drawn objects
* @param {Boolean} [intersecting] If `true`, send object in front of next upper intersecting object
* @return {fabric.Object} thisArg
* @chainable
*/
bringForward: function(intersecting) {
if (this.group) {
fabric.StaticCanvas.prototype.bringForward.call(this.group, this, intersecting);
}
else {
this.canvas.bringForward(this, intersecting);
}
return this;
},
/**
* Moves an object to specified level in stack of drawn objects
* @param {Number} index New position of object
* @return {fabric.Object} thisArg
* @chainable
*/
moveTo: function(index) {
if (this.group && this.group.type !== 'activeSelection') {
fabric.StaticCanvas.prototype.moveTo.call(this.group, this, index);
}
else {
this.canvas.moveTo(this, index);
}
return this;
}
});
/* _TO_SVG_START_ */
(function() {
function getSvgColorString(prop, value) {
if (!value) {
return prop + ': none; ';
}
else if (value.toLive) {
return prop + ': url(#SVGID_' + value.id + '); ';
}
else {
var color = new fabric.Color(value),
str = prop + ': ' + color.toRgb() + '; ',
opacity = color.getAlpha();
if (opacity !== 1) {
//change the color in rgb + opacity
str += prop + '-opacity: ' + opacity.toString() + '; ';
}
return str;
}
}
var toFixed = fabric.util.toFixed;
fabric.util.object.extend(fabric.Object.prototype, /** @lends fabric.Object.prototype */ {
/**
* Returns styles-string for svg-export
* @param {Boolean} skipShadow a boolean to skip shadow filter output
* @return {String}
*/
getSvgStyles: function(skipShadow) {
var fillRule = this.fillRule ? this.fillRule : 'nonzero',
strokeWidth = this.strokeWidth ? this.strokeWidth : '0',
strokeDashArray = this.strokeDashArray ? this.strokeDashArray.join(' ') : 'none',
strokeDashOffset = this.strokeDashOffset ? this.strokeDashOffset : '0',
strokeLineCap = this.strokeLineCap ? this.strokeLineCap : 'butt',
strokeLineJoin = this.strokeLineJoin ? this.strokeLineJoin : 'miter',
strokeMiterLimit = this.strokeMiterLimit ? this.strokeMiterLimit : '4',
opacity = typeof this.opacity !== 'undefined' ? this.opacity : '1',
visibility = this.visible ? '' : ' visibility: hidden;',
filter = skipShadow ? '' : this.getSvgFilter(),
fill = getSvgColorString('fill', this.fill),
stroke = getSvgColorString('stroke', this.stroke);
return [
stroke,
'stroke-width: ', strokeWidth, '; ',
'stroke-dasharray: ', strokeDashArray, '; ',
'stroke-linecap: ', strokeLineCap, '; ',
'stroke-dashoffset: ', strokeDashOffset, '; ',
'stroke-linejoin: ', strokeLineJoin, '; ',
'stroke-miterlimit: ', strokeMiterLimit, '; ',
fill,
'fill-rule: ', fillRule, '; ',
'opacity: ', opacity, ';',
filter,
visibility
].join('');
},
/**
* Returns styles-string for svg-export
* @param {Object} style the object from which to retrieve style properties
* @param {Boolean} useWhiteSpace a boolean to include an additional attribute in the style.
* @return {String}
*/
getSvgSpanStyles: function(style, useWhiteSpace) {
var term = '; ';
var fontFamily = style.fontFamily ?
'font-family: ' + (((style.fontFamily.indexOf('\'') === -1 && style.fontFamily.indexOf('"') === -1) ?
'\'' + style.fontFamily + '\'' : style.fontFamily)) + term : '';
var strokeWidth = style.strokeWidth ? 'stroke-width: ' + style.strokeWidth + term : '',
fontFamily = fontFamily,
fontSize = style.fontSize ? 'font-size: ' + style.fontSize + 'px' + term : '',
fontStyle = style.fontStyle ? 'font-style: ' + style.fontStyle + term : '',
fontWeight = style.fontWeight ? 'font-weight: ' + style.fontWeight + term : '',
fill = style.fill ? getSvgColorString('fill', style.fill) : '',
stroke = style.stroke ? getSvgColorString('stroke', style.stroke) : '',
textDecoration = this.getSvgTextDecoration(style),
deltaY = style.deltaY ? 'baseline-shift: ' + (-style.deltaY) + '; ' : '';
if (textDecoration) {
textDecoration = 'text-decoration: ' + textDecoration + term;
}
return [
stroke,
strokeWidth,
fontFamily,
fontSize,
fontStyle,
fontWeight,
textDecoration,
fill,
deltaY,
useWhiteSpace ? 'white-space: pre; ' : ''
].join('');
},
/**
* Returns text-decoration property for svg-export
* @param {Object} style the object from which to retrieve style properties
* @return {String}
*/
getSvgTextDecoration: function(style) {
if ('overline' in style || 'underline' in style || 'linethrough' in style) {
return (style.overline ? 'overline ' : '') +
(style.underline ? 'underline ' : '') + (style.linethrough ? 'line-through ' : '');
}
return '';
},
/**
* Returns filter for svg shadow
* @return {String}
*/
getSvgFilter: function() {
return this.shadow ? 'filter: url(#SVGID_' + this.shadow.id + ');' : '';
},
/**
* Returns id attribute for svg output
* @return {String}
*/
getSvgCommons: function() {
return [
this.id ? 'id="' + this.id + '" ' : '',
this.clipPath ? 'clip-path="url(#' + this.clipPath.clipPathId + ')" ' : '',
].join('');
},
/**
* Returns transform-string for svg-export
* @param {Boolean} use the full transform or the single object one.
* @return {String}
*/
getSvgTransform: function(full, additionalTransform) {
var transform = full ? this.calcTransformMatrix() : this.calcOwnMatrix(),
svgTransform = 'transform="' + fabric.util.matrixToSVG(transform);
return svgTransform +
(additionalTransform || '') + this.getSvgTransformMatrix() + '" ';
},
/**
* Returns transform-string for svg-export from the transform matrix of single elements
* @return {String}
*/
getSvgTransformMatrix: function() {
return this.transformMatrix ? ' ' + fabric.util.matrixToSVG(this.transformMatrix) : '';
},
_setSVGBg: function(textBgRects) {
if (this.backgroundColor) {
var NUM_FRACTION_DIGITS = fabric.Object.NUM_FRACTION_DIGITS;
textBgRects.push(
'\t\t<rect ',
this._getFillAttributes(this.backgroundColor),
' x="',
toFixed(-this.width / 2, NUM_FRACTION_DIGITS),
'" y="',
toFixed(-this.height / 2, NUM_FRACTION_DIGITS),
'" width="',
toFixed(this.width, NUM_FRACTION_DIGITS),
'" height="',
toFixed(this.height, NUM_FRACTION_DIGITS),
'"></rect>\n');
}
},
/**
* Returns svg representation of an instance
* @param {Function} [reviver] Method for further parsing of svg representation.
* @return {String} svg representation of an instance
*/
toSVG: function(reviver) {
return this._createBaseSVGMarkup(this._toSVG(reviver), { reviver: reviver });
},
/**
* Returns svg clipPath representation of an instance
* @param {Function} [reviver] Method for further parsing of svg representation.
* @return {String} svg representation of an instance
*/
toClipPathSVG: function(reviver) {
return '\t' + this._createBaseClipPathSVGMarkup(this._toSVG(reviver), { reviver: reviver });
},
/**
* @private
*/
_createBaseClipPathSVGMarkup: function(objectMarkup, options) {
options = options || {};
var reviver = options.reviver,
additionalTransform = options.additionalTransform || '',
commonPieces = [
this.getSvgTransform(true, additionalTransform),
this.getSvgCommons(),
].join(''),
// insert commons in the markup, style and svgCommons
index = objectMarkup.indexOf('COMMON_PARTS');
objectMarkup[index] = commonPieces;
return reviver ? reviver(objectMarkup.join('')) : objectMarkup.join('');
},
/**
* @private
*/
_createBaseSVGMarkup: function(objectMarkup, options) {
options = options || {};
var noStyle = options.noStyle,
reviver = options.reviver,
styleInfo = noStyle ? '' : 'style="' + this.getSvgStyles() + '" ',
shadowInfo = options.withShadow ? 'style="' + this.getSvgFilter() + '" ' : '',
clipPath = this.clipPath,
vectorEffect = this.strokeUniform ? 'vector-effect="non-scaling-stroke" ' : '',
absoluteClipPath = clipPath && clipPath.absolutePositioned,
stroke = this.stroke, fill = this.fill, shadow = this.shadow,
commonPieces, markup = [], clipPathMarkup,
// insert commons in the markup, style and svgCommons
index = objectMarkup.indexOf('COMMON_PARTS'),
additionalTransform = options.additionalTransform;
if (clipPath) {
clipPath.clipPathId = 'CLIPPATH_' + fabric.Object.__uid++;
clipPathMarkup = '<clipPath id="' + clipPath.clipPathId + '" >\n' +
clipPath.toClipPathSVG(reviver) +
'</clipPath>\n';
}
if (absoluteClipPath) {
markup.push(
'<g ', shadowInfo, this.getSvgCommons(), ' >\n'
);
}
markup.push(
'<g ',
this.getSvgTransform(false),
!absoluteClipPath ? shadowInfo + this.getSvgCommons() : '',
' >\n'
);
commonPieces = [
styleInfo,
vectorEffect,
noStyle ? '' : this.addPaintOrder(), ' ',
additionalTransform ? 'transform="' + additionalTransform + '" ' : '',
].join('');
objectMarkup[index] = commonPieces;
if (fill && fill.toLive) {
markup.push(fill.toSVG(this));
}
if (stroke && stroke.toLive) {
markup.push(stroke.toSVG(this));
}
if (shadow) {
markup.push(shadow.toSVG(this));
}
if (clipPath) {
markup.push(clipPathMarkup);
}
markup.push(objectMarkup.join(''));
markup.push('</g>\n');
absoluteClipPath && markup.push('</g>\n');
return reviver ? reviver(markup.join('')) : markup.join('');
},
addPaintOrder: function() {
return this.paintFirst !== 'fill' ? ' paint-order="' + this.paintFirst + '" ' : '';
}
});
})();
/* _TO_SVG_END_ */
(function() {
var extend = fabric.util.object.extend,
originalSet = 'stateProperties';
/*
Depends on `stateProperties`
*/
function saveProps(origin, destination, props) {
var tmpObj = { }, deep = true;
props.forEach(function(prop) {
tmpObj[prop] = origin[prop];
});
extend(origin[destination], tmpObj, deep);
}
function _isEqual(origValue, currentValue, firstPass) {
if (origValue === currentValue) {
// if the objects are identical, return
return true;
}
else if (Array.isArray(origValue)) {
if (!Array.isArray(currentValue) || origValue.length !== currentValue.length) {
return false;
}
for (var i = 0, len = origValue.length; i < len; i++) {
if (!_isEqual(origValue[i], currentValue[i])) {
return false;
}
}
return true;
}
else if (origValue && typeof origValue === 'object') {
var keys = Object.keys(origValue), key;
if (!currentValue ||
typeof currentValue !== 'object' ||
(!firstPass && keys.length !== Object.keys(currentValue).length)
) {
return false;
}
for (var i = 0, len = keys.length; i < len; i++) {
key = keys[i];
// since clipPath is in the statefull cache list and the clipPath objects
// would be iterated as an object, this would lead to possible infinite recursion
if (key === 'canvas') {
continue;
}
if (!_isEqual(origValue[key], currentValue[key])) {
return false;
}
}
return true;
}
}
fabric.util.object.extend(fabric.Object.prototype, /** @lends fabric.Object.prototype */ {
/**
* Returns true if object state (one of its state properties) was changed
* @param {String} [propertySet] optional name for the set of property we want to save
* @return {Boolean} true if instance' state has changed since `{@link fabric.Object#saveState}` was called
*/
hasStateChanged: function(propertySet) {
propertySet = propertySet || originalSet;
var dashedPropertySet = '_' + propertySet;
if (Object.keys(this[dashedPropertySet]).length < this[propertySet].length) {
return true;
}
return !_isEqual(this[dashedPropertySet], this, true);
},
/**
* Saves state of an object
* @param {Object} [options] Object with additional `stateProperties` array to include when saving state
* @return {fabric.Object} thisArg
*/
saveState: function(options) {
var propertySet = options && options.propertySet || originalSet,
destination = '_' + propertySet;
if (!this[destination]) {
return this.setupState(options);
}
saveProps(this, destination, this[propertySet]);
if (options && options.stateProperties) {
saveProps(this, destination, options.stateProperties);
}
return this;
},
/**
* Setups state of an object
* @param {Object} [options] Object with additional `stateProperties` array to include when saving state
* @return {fabric.Object} thisArg
*/
setupState: function(options) {
options = options || { };
var propertySet = options.propertySet || originalSet;
options.propertySet = propertySet;
this['_' + propertySet] = { };
this.saveState(options);
return this;
}
});
})();
(function() {
var degreesToRadians = fabric.util.degreesToRadians;
fabric.util.object.extend(fabric.Object.prototype, /** @lends fabric.Object.prototype */ {
/**
* The object interactivity controls.
* @private
*/
_controlsVisibility: null,
/**
* Determines which corner has been clicked
* @private
* @param {Object} pointer The pointer indicating the mouse position
* @return {String|Boolean} corner code (tl, tr, bl, br, etc.), or false if nothing is found
*/
_findTargetCorner: function(pointer) {
// objects in group, anykind, are not self modificable,
// must not return an hovered corner.
if (!this.hasControls || this.group || (!this.canvas || this.canvas._activeObject !== this)) {
return false;
}
var ex = pointer.x,
ey = pointer.y,
xPoints,
lines;
this.__corner = 0;
for (var i in this.oCoords) {
if (!this.isControlVisible(i)) {
continue;
}
if (i === 'mtr' && !this.hasRotatingPoint) {
continue;
}
if (this.get('lockUniScaling') &&
(i === 'mt' || i === 'mr' || i === 'mb' || i === 'ml')) {
continue;
}
lines = this._getImageLines(this.oCoords[i].corner);
// debugging
// canvas.contextTop.fillRect(lines.bottomline.d.x, lines.bottomline.d.y, 2, 2);
// canvas.contextTop.fillRect(lines.bottomline.o.x, lines.bottomline.o.y, 2, 2);
// canvas.contextTop.fillRect(lines.leftline.d.x, lines.leftline.d.y, 2, 2);
// canvas.contextTop.fillRect(lines.leftline.o.x, lines.leftline.o.y, 2, 2);
// canvas.contextTop.fillRect(lines.topline.d.x, lines.topline.d.y, 2, 2);
// canvas.contextTop.fillRect(lines.topline.o.x, lines.topline.o.y, 2, 2);
// canvas.contextTop.fillRect(lines.rightline.d.x, lines.rightline.d.y, 2, 2);
// canvas.contextTop.fillRect(lines.rightline.o.x, lines.rightline.o.y, 2, 2);
xPoints = this._findCrossPoints({ x: ex, y: ey }, lines);
if (xPoints !== 0 && xPoints % 2 === 1) {
this.__corner = i;
return i;
}
}
return false;
},
/**
* Sets the coordinates of the draggable boxes in the corners of
* the image used to scale/rotate it.
* @private
*/
_setCornerCoords: function() {
var coords = this.oCoords,
newTheta = degreesToRadians(45 - this.angle),
/* Math.sqrt(2 * Math.pow(this.cornerSize, 2)) / 2, */
/* 0.707106 stands for sqrt(2)/2 */
cornerHypotenuse = this.cornerSize * 0.707106,
cosHalfOffset = cornerHypotenuse * fabric.util.cos(newTheta),
sinHalfOffset = cornerHypotenuse * fabric.util.sin(newTheta),
x, y;
for (var point in coords) {
x = coords[point].x;
y = coords[point].y;
coords[point].corner = {
tl: {
x: x - sinHalfOffset,
y: y - cosHalfOffset
},
tr: {
x: x + cosHalfOffset,
y: y - sinHalfOffset
},
bl: {
x: x - cosHalfOffset,
y: y + sinHalfOffset
},
br: {
x: x + sinHalfOffset,
y: y + cosHalfOffset
}
};
}
},
/**
* Draws a colored layer behind the object, inside its selection borders.
* Requires public options: padding, selectionBackgroundColor
* this function is called when the context is transformed
* has checks to be skipped when the object is on a staticCanvas
* @param {CanvasRenderingContext2D} ctx Context to draw on
* @return {fabric.Object} thisArg
* @chainable
*/
drawSelectionBackground: function(ctx) {
if (!this.selectionBackgroundColor ||
(this.canvas && !this.canvas.interactive) ||
(this.canvas && this.canvas._activeObject !== this)
) {
return this;
}
ctx.save();
var center = this.getCenterPoint(), wh = this._calculateCurrentDimensions(),
vpt = this.canvas.viewportTransform;
ctx.translate(center.x, center.y);
ctx.scale(1 / vpt[0], 1 / vpt[3]);
ctx.rotate(degreesToRadians(this.angle));
ctx.fillStyle = this.selectionBackgroundColor;
ctx.fillRect(-wh.x / 2, -wh.y / 2, wh.x, wh.y);
ctx.restore();
return this;
},
/**
* Draws borders of an object's bounding box.
* Requires public properties: width, height
* Requires public options: padding, borderColor
* @param {CanvasRenderingContext2D} ctx Context to draw on
* @param {Object} styleOverride object to override the object style
* @return {fabric.Object} thisArg
* @chainable
*/
drawBorders: function(ctx, styleOverride) {
styleOverride = styleOverride || {};
var wh = this._calculateCurrentDimensions(),
strokeWidth = 1 / this.borderScaleFactor,
width = wh.x + strokeWidth,
height = wh.y + strokeWidth,
drawRotatingPoint = typeof styleOverride.hasRotatingPoint !== 'undefined' ?
styleOverride.hasRotatingPoint : this.hasRotatingPoint,
hasControls = typeof styleOverride.hasControls !== 'undefined' ?
styleOverride.hasControls : this.hasControls,
rotatingPointOffset = typeof styleOverride.rotatingPointOffset !== 'undefined' ?
styleOverride.rotatingPointOffset : this.rotatingPointOffset;
ctx.save();
ctx.strokeStyle = styleOverride.borderColor || this.borderColor;
this._setLineDash(ctx, styleOverride.borderDashArray || this.borderDashArray, null);
ctx.strokeRect(
-width / 2,
-height / 2,
width,
height
);
if (drawRotatingPoint && this.isControlVisible('mtr') && hasControls) {
var rotateHeight = -height / 2;
ctx.beginPath();
ctx.moveTo(0, rotateHeight);
ctx.lineTo(0, rotateHeight - rotatingPointOffset);
ctx.stroke();
}
ctx.restore();
return this;
},
/**
* Draws borders of an object's bounding box when it is inside a group.
* Requires public properties: width, height
* Requires public options: padding, borderColor
* @param {CanvasRenderingContext2D} ctx Context to draw on
* @param {object} options object representing current object parameters
* @param {Object} styleOverride object to override the object style
* @return {fabric.Object} thisArg
* @chainable
*/
drawBordersInGroup: function(ctx, options, styleOverride) {
styleOverride = styleOverride || {};
var p = this._getNonTransformedDimensions(),
matrix = fabric.util.composeMatrix({
scaleX: options.scaleX,
scaleY: options.scaleY,
skewX: options.skewX
}),
wh = fabric.util.transformPoint(p, matrix),
strokeWidth = 1 / this.borderScaleFactor,
width = wh.x + strokeWidth,
height = wh.y + strokeWidth;
ctx.save();
this._setLineDash(ctx, styleOverride.borderDashArray || this.borderDashArray, null);
ctx.strokeStyle = styleOverride.borderColor || this.borderColor;
ctx.strokeRect(
-width / 2,
-height / 2,
width,
height
);
ctx.restore();
return this;
},
/**
* Draws corners of an object's bounding box.
* Requires public properties: width, height
* Requires public options: cornerSize, padding
* @param {CanvasRenderingContext2D} ctx Context to draw on
* @param {Object} styleOverride object to override the object style
* @return {fabric.Object} thisArg
* @chainable
*/
drawControls: function(ctx, styleOverride) {
styleOverride = styleOverride || {};
var wh = this._calculateCurrentDimensions(),
width = wh.x,
height = wh.y,
scaleOffset = styleOverride.cornerSize || this.cornerSize,
left = -(width + scaleOffset) / 2,
top = -(height + scaleOffset) / 2,
transparentCorners = typeof styleOverride.transparentCorners !== 'undefined' ?
styleOverride.transparentCorners : this.transparentCorners,
hasRotatingPoint = typeof styleOverride.hasRotatingPoint !== 'undefined' ?
styleOverride.hasRotatingPoint : this.hasRotatingPoint,
methodName = transparentCorners ? 'stroke' : 'fill';
ctx.save();
ctx.strokeStyle = ctx.fillStyle = styleOverride.cornerColor || this.cornerColor;
if (!this.transparentCorners) {
ctx.strokeStyle = styleOverride.cornerStrokeColor || this.cornerStrokeColor;
}
this._setLineDash(ctx, styleOverride.cornerDashArray || this.cornerDashArray, null);
// top-left
this._drawControl('tl', ctx, methodName,
left,
top, styleOverride);
// top-right
this._drawControl('tr', ctx, methodName,
left + width,
top, styleOverride);
// bottom-left
this._drawControl('bl', ctx, methodName,
left,
top + height, styleOverride);
// bottom-right
this._drawControl('br', ctx, methodName,
left + width,
top + height, styleOverride);
if (!this.get('lockUniScaling')) {
// middle-top
this._drawControl('mt', ctx, methodName,
left + width / 2,
top, styleOverride);
// middle-bottom
this._drawControl('mb', ctx, methodName,
left + width / 2,
top + height, styleOverride);
// middle-right
this._drawControl('mr', ctx, methodName,
left + width,
top + height / 2, styleOverride);
// middle-left
this._drawControl('ml', ctx, methodName,
left,
top + height / 2, styleOverride);
}
// middle-top-rotate
if (hasRotatingPoint) {
this._drawControl('mtr', ctx, methodName,
left + width / 2,
top - this.rotatingPointOffset, styleOverride);
}
ctx.restore();
return this;
},
/**
* @private
*/
_drawControl: function(control, ctx, methodName, left, top, styleOverride) {
styleOverride = styleOverride || {};
if (!this.isControlVisible(control)) {
return;
}
var size = this.cornerSize, stroke = !this.transparentCorners && this.cornerStrokeColor;
switch (styleOverride.cornerStyle || this.cornerStyle) {
case 'circle':
ctx.beginPath();
ctx.arc(left + size / 2, top + size / 2, size / 2, 0, 2 * Math.PI, false);
ctx[methodName]();
if (stroke) {
ctx.stroke();
}
break;
default:
this.transparentCorners || ctx.clearRect(left, top, size, size);
ctx[methodName + 'Rect'](left, top, size, size);
if (stroke) {
ctx.strokeRect(left, top, size, size);
}
}
},
/**
* Returns true if the specified control is visible, false otherwise.
* @param {String} controlName The name of the control. Possible values are 'tl', 'tr', 'br', 'bl', 'ml', 'mt', 'mr', 'mb', 'mtr'.
* @returns {Boolean} true if the specified control is visible, false otherwise
*/
isControlVisible: function(controlName) {
return this._getControlsVisibility()[controlName];
},
/**
* Sets the visibility of the specified control.
* @param {String} controlName The name of the control. Possible values are 'tl', 'tr', 'br', 'bl', 'ml', 'mt', 'mr', 'mb', 'mtr'.
* @param {Boolean} visible true to set the specified control visible, false otherwise
* @return {fabric.Object} thisArg
* @chainable
*/
setControlVisible: function(controlName, visible) {
this._getControlsVisibility()[controlName] = visible;
return this;
},
/**
* Sets the visibility state of object controls.
* @param {Object} [options] Options object
* @param {Boolean} [options.bl] true to enable the bottom-left control, false to disable it
* @param {Boolean} [options.br] true to enable the bottom-right control, false to disable it
* @param {Boolean} [options.mb] true to enable the middle-bottom control, false to disable it
* @param {Boolean} [options.ml] true to enable the middle-left control, false to disable it
* @param {Boolean} [options.mr] true to enable the middle-right control, false to disable it
* @param {Boolean} [options.mt] true to enable the middle-top control, false to disable it
* @param {Boolean} [options.tl] true to enable the top-left control, false to disable it
* @param {Boolean} [options.tr] true to enable the top-right control, false to disable it
* @param {Boolean} [options.mtr] true to enable the middle-top-rotate control, false to disable it
* @return {fabric.Object} thisArg
* @chainable
*/
setControlsVisibility: function(options) {
options || (options = { });
for (var p in options) {
this.setControlVisible(p, options[p]);
}
return this;
},
/**
* Returns the instance of the control visibility set for this object.
* @private
* @returns {Object}
*/
_getControlsVisibility: function() {
if (!this._controlsVisibility) {
this._controlsVisibility = {
tl: true,
tr: true,
br: true,
bl: true,
ml: true,
mt: true,
mr: true,
mb: true,
mtr: true
};
}
return this._controlsVisibility;
},
/**
* This callback function is called every time _discardActiveObject or _setActiveObject
* try to to deselect this object. If the function returns true, the process is cancelled
* @param {Object} [options] options sent from the upper functions
* @param {Event} [options.e] event if the process is generated by an event
*/
onDeselect: function() {
// implemented by sub-classes, as needed.
},
/**
* This callback function is called every time _discardActiveObject or _setActiveObject
* try to to select this object. If the function returns true, the process is cancelled
* @param {Object} [options] options sent from the upper functions
* @param {Event} [options.e] event if the process is generated by an event
*/
onSelect: function() {
// implemented by sub-classes, as needed.
}
});
})();
fabric.util.object.extend(fabric.StaticCanvas.prototype, /** @lends fabric.StaticCanvas.prototype */ {
/**
* Animation duration (in ms) for fx* methods
* @type Number
* @default
*/
FX_DURATION: 500,
/**
* Centers object horizontally with animation.
* @param {fabric.Object} object Object to center
* @param {Object} [callbacks] Callbacks object with optional "onComplete" and/or "onChange" properties
* @param {Function} [callbacks.onComplete] Invoked on completion
* @param {Function} [callbacks.onChange] Invoked on every step of animation
* @return {fabric.Canvas} thisArg
* @chainable
*/
fxCenterObjectH: function (object, callbacks) {
callbacks = callbacks || { };
var empty = function() { },
onComplete = callbacks.onComplete || empty,
onChange = callbacks.onChange || empty,
_this = this;
fabric.util.animate({
startValue: object.left,
endValue: this.getCenter().left,
duration: this.FX_DURATION,
onChange: function(value) {
object.set('left', value);
_this.requestRenderAll();
onChange();
},
onComplete: function() {
object.setCoords();
onComplete();
}
});
return this;
},
/**
* Centers object vertically with animation.
* @param {fabric.Object} object Object to center
* @param {Object} [callbacks] Callbacks object with optional "onComplete" and/or "onChange" properties
* @param {Function} [callbacks.onComplete] Invoked on completion
* @param {Function} [callbacks.onChange] Invoked on every step of animation
* @return {fabric.Canvas} thisArg
* @chainable
*/
fxCenterObjectV: function (object, callbacks) {
callbacks = callbacks || { };
var empty = function() { },
onComplete = callbacks.onComplete || empty,
onChange = callbacks.onChange || empty,
_this = this;
fabric.util.animate({
startValue: object.top,
endValue: this.getCenter().top,
duration: this.FX_DURATION,
onChange: function(value) {
object.set('top', value);
_this.requestRenderAll();
onChange();
},
onComplete: function() {
object.setCoords();
onComplete();
}
});
return this;
},
/**
* Same as `fabric.Canvas#remove` but animated
* @param {fabric.Object} object Object to remove
* @param {Object} [callbacks] Callbacks object with optional "onComplete" and/or "onChange" properties
* @param {Function} [callbacks.onComplete] Invoked on completion
* @param {Function} [callbacks.onChange] Invoked on every step of animation
* @return {fabric.Canvas} thisArg
* @chainable
*/
fxRemove: function (object, callbacks) {
callbacks = callbacks || { };
var empty = function() { },
onComplete = callbacks.onComplete || empty,
onChange = callbacks.onChange || empty,
_this = this;
fabric.util.animate({
startValue: object.opacity,
endValue: 0,
duration: this.FX_DURATION,
onChange: function(value) {
object.set('opacity', value);
_this.requestRenderAll();
onChange();
},
onComplete: function () {
_this.remove(object);
onComplete();
}
});
return this;
}
});
fabric.util.object.extend(fabric.Object.prototype, /** @lends fabric.Object.prototype */ {
/**
* Animates object's properties
* @param {String|Object} property Property to animate (if string) or properties to animate (if object)
* @param {Number|Object} value Value to animate property to (if string was given first) or options object
* @return {fabric.Object} thisArg
* @tutorial {@link http://fabricjs.com/fabric-intro-part-2#animation}
* @chainable
*
* As object — multiple properties
*
* object.animate({ left: ..., top: ... });
* object.animate({ left: ..., top: ... }, { duration: ... });
*
* As string — one property
*
* object.animate('left', ...);
* object.animate('left', { duration: ... });
*
*/
animate: function() {
if (arguments[0] && typeof arguments[0] === 'object') {
var propsToAnimate = [], prop, skipCallbacks;
for (prop in arguments[0]) {
propsToAnimate.push(prop);
}
for (var i = 0, len = propsToAnimate.length; i < len; i++) {
prop = propsToAnimate[i];
skipCallbacks = i !== len - 1;
this._animate(prop, arguments[0][prop], arguments[1], skipCallbacks);
}
}
else {
this._animate.apply(this, arguments);
}
return this;
},
/**
* @private
* @param {String} property Property to animate
* @param {String} to Value to animate to
* @param {Object} [options] Options object
* @param {Boolean} [skipCallbacks] When true, callbacks like onchange and oncomplete are not invoked
*/
_animate: function(property, to, options, skipCallbacks) {
var _this = this, propPair;
to = to.toString();
if (!options) {
options = { };
}
else {
options = fabric.util.object.clone(options);
}
if (~property.indexOf('.')) {
propPair = property.split('.');
}
var currentValue = propPair
? this.get(propPair[0])[propPair[1]]
: this.get(property);
if (!('from' in options)) {
options.from = currentValue;
}
if (~to.indexOf('=')) {
to = currentValue + parseFloat(to.replace('=', ''));
}
else {
to = parseFloat(to);
}
fabric.util.animate({
startValue: options.from,
endValue: to,
byValue: options.by,
easing: options.easing,
duration: options.duration,
abort: options.abort && function() {
return options.abort.call(_this);
},
onChange: function(value, valueProgress, timeProgress) {
if (propPair) {
_this[propPair[0]][propPair[1]] = value;
}
else {
_this.set(property, value);
}
if (skipCallbacks) {
return;
}
options.onChange && options.onChange(value, valueProgress, timeProgress);
},
onComplete: function(value, valueProgress, timeProgress) {
if (skipCallbacks) {
return;
}
_this.setCoords();
options.onComplete && options.onComplete(value, valueProgress, timeProgress);
}
});
}
});
(function(global) {
'use strict';
var fabric = global.fabric || (global.fabric = { }),
extend = fabric.util.object.extend,
clone = fabric.util.object.clone,
coordProps = { x1: 1, x2: 1, y1: 1, y2: 1 },
supportsLineDash = fabric.StaticCanvas.supports('setLineDash');
if (fabric.Line) {
fabric.warn('fabric.Line is already defined');
return;
}
/**
* Line class
* @class fabric.Line
* @extends fabric.Object
* @see {@link fabric.Line#initialize} for constructor definition
*/
fabric.Line = fabric.util.createClass(fabric.Object, /** @lends fabric.Line.prototype */ {
/**
* Type of an object
* @type String
* @default
*/
type: 'line',
/**
* x value or first line edge
* @type Number
* @default
*/
x1: 0,
/**
* y value or first line edge
* @type Number
* @default
*/
y1: 0,
/**
* x value or second line edge
* @type Number
* @default
*/
x2: 0,
/**
* y value or second line edge
* @type Number
* @default
*/
y2: 0,
cacheProperties: fabric.Object.prototype.cacheProperties.concat('x1', 'x2', 'y1', 'y2'),
/**
* Constructor
* @param {Array} [points] Array of points
* @param {Object} [options] Options object
* @return {fabric.Line} thisArg
*/
initialize: function(points, options) {
if (!points) {
points = [0, 0, 0, 0];
}
this.callSuper('initialize', options);
this.set('x1', points[0]);
this.set('y1', points[1]);
this.set('x2', points[2]);
this.set('y2', points[3]);
this._setWidthHeight(options);
},
/**
* @private
* @param {Object} [options] Options
*/
_setWidthHeight: function(options) {
options || (options = { });
this.width = Math.abs(this.x2 - this.x1);
this.height = Math.abs(this.y2 - this.y1);
this.left = 'left' in options
? options.left
: this._getLeftToOriginX();
this.top = 'top' in options
? options.top
: this._getTopToOriginY();
},
/**
* @private
* @param {String} key
* @param {*} value
*/
_set: function(key, value) {
this.callSuper('_set', key, value);
if (typeof coordProps[key] !== 'undefined') {
this._setWidthHeight();
}
return this;
},
/**
* @private
* @return {Number} leftToOriginX Distance from left edge of canvas to originX of Line.
*/
_getLeftToOriginX: makeEdgeToOriginGetter(
{ // property names
origin: 'originX',
axis1: 'x1',
axis2: 'x2',
dimension: 'width'
},
{ // possible values of origin
nearest: 'left',
center: 'center',
farthest: 'right'
}
),
/**
* @private
* @return {Number} topToOriginY Distance from top edge of canvas to originY of Line.
*/
_getTopToOriginY: makeEdgeToOriginGetter(
{ // property names
origin: 'originY',
axis1: 'y1',
axis2: 'y2',
dimension: 'height'
},
{ // possible values of origin
nearest: 'top',
center: 'center',
farthest: 'bottom'
}
),
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_render: function(ctx) {
ctx.beginPath();
if (!this.strokeDashArray || this.strokeDashArray && supportsLineDash) {
// move from center (of virtual box) to its left/top corner
// we can't assume x1, y1 is top left and x2, y2 is bottom right
var p = this.calcLinePoints();
ctx.moveTo(p.x1, p.y1);
ctx.lineTo(p.x2, p.y2);
}
ctx.lineWidth = this.strokeWidth;
// TODO: test this
// make sure setting "fill" changes color of a line
// (by copying fillStyle to strokeStyle, since line is stroked, not filled)
var origStrokeStyle = ctx.strokeStyle;
ctx.strokeStyle = this.stroke || ctx.fillStyle;
this.stroke && this._renderStroke(ctx);
ctx.strokeStyle = origStrokeStyle;
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_renderDashedStroke: function(ctx) {
var p = this.calcLinePoints();
ctx.beginPath();
fabric.util.drawDashedLine(ctx, p.x1, p.y1, p.x2, p.y2, this.strokeDashArray);
ctx.closePath();
},
/**
* This function is an helper for svg import. it returns the center of the object in the svg
* untransformed coordinates
* @private
* @return {Object} center point from element coordinates
*/
_findCenterFromElement: function() {
return {
x: (this.x1 + this.x2) / 2,
y: (this.y1 + this.y2) / 2,
};
},
/**
* Returns object representation of an instance
* @methd toObject
* @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output
* @return {Object} object representation of an instance
*/
toObject: function(propertiesToInclude) {
return extend(this.callSuper('toObject', propertiesToInclude), this.calcLinePoints());
},
/*
* Calculate object dimensions from its properties
* @private
*/
_getNonTransformedDimensions: function() {
var dim = this.callSuper('_getNonTransformedDimensions');
if (this.strokeLineCap === 'butt') {
if (this.width === 0) {
dim.y -= this.strokeWidth;
}
if (this.height === 0) {
dim.x -= this.strokeWidth;
}
}
return dim;
},
/**
* Recalculates line points given width and height
* @private
*/
calcLinePoints: function() {
var xMult = this.x1 <= this.x2 ? -1 : 1,
yMult = this.y1 <= this.y2 ? -1 : 1,
x1 = (xMult * this.width * 0.5),
y1 = (yMult * this.height * 0.5),
x2 = (xMult * this.width * -0.5),
y2 = (yMult * this.height * -0.5);
return {
x1: x1,
x2: x2,
y1: y1,
y2: y2
};
},
/* _TO_SVG_START_ */
/**
* Returns svg representation of an instance
* @return {Array} an array of strings with the specific svg representation
* of the instance
*/
_toSVG: function() {
var p = this.calcLinePoints();
return [
'<line ', 'COMMON_PARTS',
'x1="', p.x1,
'" y1="', p.y1,
'" x2="', p.x2,
'" y2="', p.y2,
'" />\n'
];
},
/* _TO_SVG_END_ */
});
/* _FROM_SVG_START_ */
/**
* List of attribute names to account for when parsing SVG element (used by {@link fabric.Line.fromElement})
* @static
* @memberOf fabric.Line
* @see http://www.w3.org/TR/SVG/shapes.html#LineElement
*/
fabric.Line.ATTRIBUTE_NAMES = fabric.SHARED_ATTRIBUTES.concat('x1 y1 x2 y2'.split(' '));
/**
* Returns fabric.Line instance from an SVG element
* @static
* @memberOf fabric.Line
* @param {SVGElement} element Element to parse
* @param {Object} [options] Options object
* @param {Function} [callback] callback function invoked after parsing
*/
fabric.Line.fromElement = function(element, callback, options) {
options = options || { };
var parsedAttributes = fabric.parseAttributes(element, fabric.Line.ATTRIBUTE_NAMES),
points = [
parsedAttributes.x1 || 0,
parsedAttributes.y1 || 0,
parsedAttributes.x2 || 0,
parsedAttributes.y2 || 0
];
callback(new fabric.Line(points, extend(parsedAttributes, options)));
};
/* _FROM_SVG_END_ */
/**
* Returns fabric.Line instance from an object representation
* @static
* @memberOf fabric.Line
* @param {Object} object Object to create an instance from
* @param {function} [callback] invoked with new instance as first argument
*/
fabric.Line.fromObject = function(object, callback) {
function _callback(instance) {
delete instance.points;
callback && callback(instance);
};
var options = clone(object, true);
options.points = [object.x1, object.y1, object.x2, object.y2];
fabric.Object._fromObject('Line', options, _callback, 'points');
};
/**
* Produces a function that calculates distance from canvas edge to Line origin.
*/
function makeEdgeToOriginGetter(propertyNames, originValues) {
var origin = propertyNames.origin,
axis1 = propertyNames.axis1,
axis2 = propertyNames.axis2,
dimension = propertyNames.dimension,
nearest = originValues.nearest,
center = originValues.center,
farthest = originValues.farthest;
return function() {
switch (this.get(origin)) {
case nearest:
return Math.min(this.get(axis1), this.get(axis2));
case center:
return Math.min(this.get(axis1), this.get(axis2)) + (0.5 * this.get(dimension));
case farthest:
return Math.max(this.get(axis1), this.get(axis2));
}
};
}
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
'use strict';
var fabric = global.fabric || (global.fabric = { }),
pi = Math.PI;
if (fabric.Circle) {
fabric.warn('fabric.Circle is already defined.');
return;
}
/**
* Circle class
* @class fabric.Circle
* @extends fabric.Object
* @see {@link fabric.Circle#initialize} for constructor definition
*/
fabric.Circle = fabric.util.createClass(fabric.Object, /** @lends fabric.Circle.prototype */ {
/**
* Type of an object
* @type String
* @default
*/
type: 'circle',
/**
* Radius of this circle
* @type Number
* @default
*/
radius: 0,
/**
* Start angle of the circle, moving clockwise
* deprectated type, this should be in degree, this was an oversight.
* probably will change to degrees in next major version
* @type Number
* @default 0
*/
startAngle: 0,
/**
* End angle of the circle
* deprectated type, this should be in degree, this was an oversight.
* probably will change to degrees in next major version
* @type Number
* @default 2Pi
*/
endAngle: pi * 2,
cacheProperties: fabric.Object.prototype.cacheProperties.concat('radius', 'startAngle', 'endAngle'),
/**
* @private
* @param {String} key
* @param {*} value
* @return {fabric.Circle} thisArg
*/
_set: function(key, value) {
this.callSuper('_set', key, value);
if (key === 'radius') {
this.setRadius(value);
}
return this;
},
/**
* Returns object representation of an instance
* @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output
* @return {Object} object representation of an instance
*/
toObject: function(propertiesToInclude) {
return this.callSuper('toObject', ['radius', 'startAngle', 'endAngle'].concat(propertiesToInclude));
},
/* _TO_SVG_START_ */
/**
* Returns svg representation of an instance
* @return {Array} an array of strings with the specific svg representation
* of the instance
*/
_toSVG: function() {
var svgString, x = 0, y = 0,
angle = (this.endAngle - this.startAngle) % ( 2 * pi);
if (angle === 0) {
svgString = [
'<circle ', 'COMMON_PARTS',
'cx="' + x + '" cy="' + y + '" ',
'r="', this.radius,
'" />\n'
];
}
else {
var startX = fabric.util.cos(this.startAngle) * this.radius,
startY = fabric.util.sin(this.startAngle) * this.radius,
endX = fabric.util.cos(this.endAngle) * this.radius,
endY = fabric.util.sin(this.endAngle) * this.radius,
largeFlag = angle > pi ? '1' : '0';
svgString = [
'<path d="M ' + startX + ' ' + startY,
' A ' + this.radius + ' ' + this.radius,
' 0 ', +largeFlag + ' 1', ' ' + endX + ' ' + endY,
'" ', 'COMMON_PARTS', ' />\n'
];
}
return svgString;
},
/* _TO_SVG_END_ */
/**
* @private
* @param {CanvasRenderingContext2D} ctx context to render on
*/
_render: function(ctx) {
ctx.beginPath();
ctx.arc(
0,
0,
this.radius,
this.startAngle,
this.endAngle, false);
this._renderPaintInOrder(ctx);
},
/**
* Returns horizontal radius of an object (according to how an object is scaled)
* @return {Number}
*/
getRadiusX: function() {
return this.get('radius') * this.get('scaleX');
},
/**
* Returns vertical radius of an object (according to how an object is scaled)
* @return {Number}
*/
getRadiusY: function() {
return this.get('radius') * this.get('scaleY');
},
/**
* Sets radius of an object (and updates width accordingly)
* @return {fabric.Circle} thisArg
*/
setRadius: function(value) {
this.radius = value;
return this.set('width', value * 2).set('height', value * 2);
},
});
/* _FROM_SVG_START_ */
/**
* List of attribute names to account for when parsing SVG element (used by {@link fabric.Circle.fromElement})
* @static
* @memberOf fabric.Circle
* @see: http://www.w3.org/TR/SVG/shapes.html#CircleElement
*/
fabric.Circle.ATTRIBUTE_NAMES = fabric.SHARED_ATTRIBUTES.concat('cx cy r'.split(' '));
/**
* Returns {@link fabric.Circle} instance from an SVG element
* @static
* @memberOf fabric.Circle
* @param {SVGElement} element Element to parse
* @param {Function} [callback] Options callback invoked after parsing is finished
* @param {Object} [options] Options object
* @throws {Error} If value of `r` attribute is missing or invalid
*/
fabric.Circle.fromElement = function(element, callback) {
var parsedAttributes = fabric.parseAttributes(element, fabric.Circle.ATTRIBUTE_NAMES);
if (!isValidRadius(parsedAttributes)) {
throw new Error('value of `r` attribute is required and can not be negative');
}
parsedAttributes.left = (parsedAttributes.left || 0) - parsedAttributes.radius;
parsedAttributes.top = (parsedAttributes.top || 0) - parsedAttributes.radius;
callback(new fabric.Circle(parsedAttributes));
};
/**
* @private
*/
function isValidRadius(attributes) {
return (('radius' in attributes) && (attributes.radius >= 0));
}
/* _FROM_SVG_END_ */
/**
* Returns {@link fabric.Circle} instance from an object representation
* @static
* @memberOf fabric.Circle
* @param {Object} object Object to create an instance from
* @param {function} [callback] invoked with new instance as first argument
* @return {Object} Instance of fabric.Circle
*/
fabric.Circle.fromObject = function(object, callback) {
return fabric.Object._fromObject('Circle', object, callback);
};
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
'use strict';
var fabric = global.fabric || (global.fabric = { });
if (fabric.Triangle) {
fabric.warn('fabric.Triangle is already defined');
return;
}
/**
* Triangle class
* @class fabric.Triangle
* @extends fabric.Object
* @return {fabric.Triangle} thisArg
* @see {@link fabric.Triangle#initialize} for constructor definition
*/
fabric.Triangle = fabric.util.createClass(fabric.Object, /** @lends fabric.Triangle.prototype */ {
/**
* Type of an object
* @type String
* @default
*/
type: 'triangle',
/**
* Width is set to 100 to compensate the old initialize code that was setting it to 100
* @type Number
* @default
*/
width: 100,
/**
* Height is set to 100 to compensate the old initialize code that was setting it to 100
* @type Number
* @default
*/
height: 100,
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_render: function(ctx) {
var widthBy2 = this.width / 2,
heightBy2 = this.height / 2;
ctx.beginPath();
ctx.moveTo(-widthBy2, heightBy2);
ctx.lineTo(0, -heightBy2);
ctx.lineTo(widthBy2, heightBy2);
ctx.closePath();
this._renderPaintInOrder(ctx);
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_renderDashedStroke: function(ctx) {
var widthBy2 = this.width / 2,
heightBy2 = this.height / 2;
ctx.beginPath();
fabric.util.drawDashedLine(ctx, -widthBy2, heightBy2, 0, -heightBy2, this.strokeDashArray);
fabric.util.drawDashedLine(ctx, 0, -heightBy2, widthBy2, heightBy2, this.strokeDashArray);
fabric.util.drawDashedLine(ctx, widthBy2, heightBy2, -widthBy2, heightBy2, this.strokeDashArray);
ctx.closePath();
},
/* _TO_SVG_START_ */
/**
* Returns svg representation of an instance
* @return {Array} an array of strings with the specific svg representation
* of the instance
*/
_toSVG: function() {
var widthBy2 = this.width / 2,
heightBy2 = this.height / 2,
points = [
-widthBy2 + ' ' + heightBy2,
'0 ' + -heightBy2,
widthBy2 + ' ' + heightBy2
].join(',');
return [
'<polygon ', 'COMMON_PARTS',
'points="', points,
'" />'
];
},
/* _TO_SVG_END_ */
});
/**
* Returns {@link fabric.Triangle} instance from an object representation
* @static
* @memberOf fabric.Triangle
* @param {Object} object Object to create an instance from
* @param {function} [callback] invoked with new instance as first argument
*/
fabric.Triangle.fromObject = function(object, callback) {
return fabric.Object._fromObject('Triangle', object, callback);
};
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
'use strict';
var fabric = global.fabric || (global.fabric = { }),
piBy2 = Math.PI * 2;
if (fabric.Ellipse) {
fabric.warn('fabric.Ellipse is already defined.');
return;
}
/**
* Ellipse class
* @class fabric.Ellipse
* @extends fabric.Object
* @return {fabric.Ellipse} thisArg
* @see {@link fabric.Ellipse#initialize} for constructor definition
*/
fabric.Ellipse = fabric.util.createClass(fabric.Object, /** @lends fabric.Ellipse.prototype */ {
/**
* Type of an object
* @type String
* @default
*/
type: 'ellipse',
/**
* Horizontal radius
* @type Number
* @default
*/
rx: 0,
/**
* Vertical radius
* @type Number
* @default
*/
ry: 0,
cacheProperties: fabric.Object.prototype.cacheProperties.concat('rx', 'ry'),
/**
* Constructor
* @param {Object} [options] Options object
* @return {fabric.Ellipse} thisArg
*/
initialize: function(options) {
this.callSuper('initialize', options);
this.set('rx', options && options.rx || 0);
this.set('ry', options && options.ry || 0);
},
/**
* @private
* @param {String} key
* @param {*} value
* @return {fabric.Ellipse} thisArg
*/
_set: function(key, value) {
this.callSuper('_set', key, value);
switch (key) {
case 'rx':
this.rx = value;
this.set('width', value * 2);
break;
case 'ry':
this.ry = value;
this.set('height', value * 2);
break;
}
return this;
},
/**
* Returns horizontal radius of an object (according to how an object is scaled)
* @return {Number}
*/
getRx: function() {
return this.get('rx') * this.get('scaleX');
},
/**
* Returns Vertical radius of an object (according to how an object is scaled)
* @return {Number}
*/
getRy: function() {
return this.get('ry') * this.get('scaleY');
},
/**
* Returns object representation of an instance
* @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output
* @return {Object} object representation of an instance
*/
toObject: function(propertiesToInclude) {
return this.callSuper('toObject', ['rx', 'ry'].concat(propertiesToInclude));
},
/* _TO_SVG_START_ */
/**
* Returns svg representation of an instance
* @return {Array} an array of strings with the specific svg representation
* of the instance
*/
_toSVG: function() {
return [
'<ellipse ', 'COMMON_PARTS',
'cx="0" cy="0" ',
'rx="', this.rx,
'" ry="', this.ry,
'" />\n'
];
},
/* _TO_SVG_END_ */
/**
* @private
* @param {CanvasRenderingContext2D} ctx context to render on
*/
_render: function(ctx) {
ctx.beginPath();
ctx.save();
ctx.transform(1, 0, 0, this.ry / this.rx, 0, 0);
ctx.arc(
0,
0,
this.rx,
0,
piBy2,
false);
ctx.restore();
this._renderPaintInOrder(ctx);
},
});
/* _FROM_SVG_START_ */
/**
* List of attribute names to account for when parsing SVG element (used by {@link fabric.Ellipse.fromElement})
* @static
* @memberOf fabric.Ellipse
* @see http://www.w3.org/TR/SVG/shapes.html#EllipseElement
*/
fabric.Ellipse.ATTRIBUTE_NAMES = fabric.SHARED_ATTRIBUTES.concat('cx cy rx ry'.split(' '));
/**
* Returns {@link fabric.Ellipse} instance from an SVG element
* @static
* @memberOf fabric.Ellipse
* @param {SVGElement} element Element to parse
* @param {Function} [callback] Options callback invoked after parsing is finished
* @return {fabric.Ellipse}
*/
fabric.Ellipse.fromElement = function(element, callback) {
var parsedAttributes = fabric.parseAttributes(element, fabric.Ellipse.ATTRIBUTE_NAMES);
parsedAttributes.left = (parsedAttributes.left || 0) - parsedAttributes.rx;
parsedAttributes.top = (parsedAttributes.top || 0) - parsedAttributes.ry;
callback(new fabric.Ellipse(parsedAttributes));
};
/* _FROM_SVG_END_ */
/**
* Returns {@link fabric.Ellipse} instance from an object representation
* @static
* @memberOf fabric.Ellipse
* @param {Object} object Object to create an instance from
* @param {function} [callback] invoked with new instance as first argument
* @return {fabric.Ellipse}
*/
fabric.Ellipse.fromObject = function(object, callback) {
return fabric.Object._fromObject('Ellipse', object, callback);
};
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
'use strict';
var fabric = global.fabric || (global.fabric = { }),
extend = fabric.util.object.extend;
if (fabric.Rect) {
fabric.warn('fabric.Rect is already defined');
return;
}
/**
* Rectangle class
* @class fabric.Rect
* @extends fabric.Object
* @return {fabric.Rect} thisArg
* @see {@link fabric.Rect#initialize} for constructor definition
*/
fabric.Rect = fabric.util.createClass(fabric.Object, /** @lends fabric.Rect.prototype */ {
/**
* List of properties to consider when checking if state of an object is changed ({@link fabric.Object#hasStateChanged})
* as well as for history (undo/redo) purposes
* @type Array
*/
stateProperties: fabric.Object.prototype.stateProperties.concat('rx', 'ry'),
/**
* Type of an object
* @type String
* @default
*/
type: 'rect',
/**
* Horizontal border radius
* @type Number
* @default
*/
rx: 0,
/**
* Vertical border radius
* @type Number
* @default
*/
ry: 0,
cacheProperties: fabric.Object.prototype.cacheProperties.concat('rx', 'ry'),
/**
* Constructor
* @param {Object} [options] Options object
* @return {Object} thisArg
*/
initialize: function(options) {
this.callSuper('initialize', options);
this._initRxRy();
},
/**
* Initializes rx/ry attributes
* @private
*/
_initRxRy: function() {
if (this.rx && !this.ry) {
this.ry = this.rx;
}
else if (this.ry && !this.rx) {
this.rx = this.ry;
}
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_render: function(ctx) {
// 1x1 case (used in spray brush) optimization was removed because
// with caching and higher zoom level this makes more damage than help
var rx = this.rx ? Math.min(this.rx, this.width / 2) : 0,
ry = this.ry ? Math.min(this.ry, this.height / 2) : 0,
w = this.width,
h = this.height,
x = -this.width / 2,
y = -this.height / 2,
isRounded = rx !== 0 || ry !== 0,
/* "magic number" for bezier approximations of arcs (http://itc.ktu.lt/itc354/Riskus354.pdf) */
k = 1 - 0.5522847498;
ctx.beginPath();
ctx.moveTo(x + rx, y);
ctx.lineTo(x + w - rx, y);
isRounded && ctx.bezierCurveTo(x + w - k * rx, y, x + w, y + k * ry, x + w, y + ry);
ctx.lineTo(x + w, y + h - ry);
isRounded && ctx.bezierCurveTo(x + w, y + h - k * ry, x + w - k * rx, y + h, x + w - rx, y + h);
ctx.lineTo(x + rx, y + h);
isRounded && ctx.bezierCurveTo(x + k * rx, y + h, x, y + h - k * ry, x, y + h - ry);
ctx.lineTo(x, y + ry);
isRounded && ctx.bezierCurveTo(x, y + k * ry, x + k * rx, y, x + rx, y);
ctx.closePath();
this._renderPaintInOrder(ctx);
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_renderDashedStroke: function(ctx) {
var x = -this.width / 2,
y = -this.height / 2,
w = this.width,
h = this.height;
ctx.beginPath();
fabric.util.drawDashedLine(ctx, x, y, x + w, y, this.strokeDashArray);
fabric.util.drawDashedLine(ctx, x + w, y, x + w, y + h, this.strokeDashArray);
fabric.util.drawDashedLine(ctx, x + w, y + h, x, y + h, this.strokeDashArray);
fabric.util.drawDashedLine(ctx, x, y + h, x, y, this.strokeDashArray);
ctx.closePath();
},
/**
* Returns object representation of an instance
* @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output
* @return {Object} object representation of an instance
*/
toObject: function(propertiesToInclude) {
return this.callSuper('toObject', ['rx', 'ry'].concat(propertiesToInclude));
},
/* _TO_SVG_START_ */
/**
* Returns svg representation of an instance
* @return {Array} an array of strings with the specific svg representation
* of the instance
*/
_toSVG: function() {
var x = -this.width / 2, y = -this.height / 2;
return [
'<rect ', 'COMMON_PARTS',
'x="', x, '" y="', y,
'" rx="', this.rx, '" ry="', this.ry,
'" width="', this.width, '" height="', this.height,
'" />\n'
];
},
/* _TO_SVG_END_ */
});
/* _FROM_SVG_START_ */
/**
* List of attribute names to account for when parsing SVG element (used by `fabric.Rect.fromElement`)
* @static
* @memberOf fabric.Rect
* @see: http://www.w3.org/TR/SVG/shapes.html#RectElement
*/
fabric.Rect.ATTRIBUTE_NAMES = fabric.SHARED_ATTRIBUTES.concat('x y rx ry width height'.split(' '));
/**
* Returns {@link fabric.Rect} instance from an SVG element
* @static
* @memberOf fabric.Rect
* @param {SVGElement} element Element to parse
* @param {Function} callback callback function invoked after parsing
* @param {Object} [options] Options object
*/
fabric.Rect.fromElement = function(element, callback, options) {
if (!element) {
return callback(null);
}
options = options || { };
var parsedAttributes = fabric.parseAttributes(element, fabric.Rect.ATTRIBUTE_NAMES);
parsedAttributes.left = parsedAttributes.left || 0;
parsedAttributes.top = parsedAttributes.top || 0;
parsedAttributes.height = parsedAttributes.height || 0;
parsedAttributes.width = parsedAttributes.width || 0;
var rect = new fabric.Rect(extend((options ? fabric.util.object.clone(options) : { }), parsedAttributes));
rect.visible = rect.visible && rect.width > 0 && rect.height > 0;
callback(rect);
};
/* _FROM_SVG_END_ */
/**
* Returns {@link fabric.Rect} instance from an object representation
* @static
* @memberOf fabric.Rect
* @param {Object} object Object to create an instance from
* @param {Function} [callback] Callback to invoke when an fabric.Rect instance is created
*/
fabric.Rect.fromObject = function(object, callback) {
return fabric.Object._fromObject('Rect', object, callback);
};
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
'use strict';
var fabric = global.fabric || (global.fabric = { }),
extend = fabric.util.object.extend,
min = fabric.util.array.min,
max = fabric.util.array.max,
toFixed = fabric.util.toFixed;
if (fabric.Polyline) {
fabric.warn('fabric.Polyline is already defined');
return;
}
/**
* Polyline class
* @class fabric.Polyline
* @extends fabric.Object
* @see {@link fabric.Polyline#initialize} for constructor definition
*/
fabric.Polyline = fabric.util.createClass(fabric.Object, /** @lends fabric.Polyline.prototype */ {
/**
* Type of an object
* @type String
* @default
*/
type: 'polyline',
/**
* Points array
* @type Array
* @default
*/
points: null,
cacheProperties: fabric.Object.prototype.cacheProperties.concat('points'),
/**
* Constructor
* @param {Array} points Array of points (where each point is an object with x and y)
* @param {Object} [options] Options object
* @return {fabric.Polyline} thisArg
* @example
* var poly = new fabric.Polyline([
* { x: 10, y: 10 },
* { x: 50, y: 30 },
* { x: 40, y: 70 },
* { x: 60, y: 50 },
* { x: 100, y: 150 },
* { x: 40, y: 100 }
* ], {
* stroke: 'red',
* left: 100,
* top: 100
* });
*/
initialize: function(points, options) {
options = options || {};
this.points = points || [];
this.callSuper('initialize', options);
this._setPositionDimensions(options);
},
_setPositionDimensions: function(options) {
var calcDim = this._calcDimensions(options), correctLeftTop;
this.width = calcDim.width;
this.height = calcDim.height;
if (!options.fromSVG) {
correctLeftTop = this.translateToGivenOrigin(
{ x: calcDim.left - this.strokeWidth / 2, y: calcDim.top - this.strokeWidth / 2 },
'left',
'top',
this.originX,
this.originY
);
}
if (typeof options.left === 'undefined') {
this.left = options.fromSVG ? calcDim.left : correctLeftTop.x;
}
if (typeof options.top === 'undefined') {
this.top = options.fromSVG ? calcDim.top : correctLeftTop.y;
}
this.pathOffset = {
x: calcDim.left + this.width / 2,
y: calcDim.top + this.height / 2
};
},
/**
* Calculate the polygon min and max point from points array,
* returning an object with left, top, widht, height to measure the
* polygon size
* @return {Object} object.left X coordinate of the polygon leftmost point
* @return {Object} object.top Y coordinate of the polygon topmost point
* @return {Object} object.width distance between X coordinates of the polygon leftmost and rightmost point
* @return {Object} object.height distance between Y coordinates of the polygon topmost and bottommost point
* @private
*/
_calcDimensions: function() {
var points = this.points,
minX = min(points, 'x') || 0,
minY = min(points, 'y') || 0,
maxX = max(points, 'x') || 0,
maxY = max(points, 'y') || 0,
width = (maxX - minX),
height = (maxY - minY);
return {
left: minX,
top: minY,
width: width,
height: height
};
},
/**
* Returns object representation of an instance
* @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output
* @return {Object} Object representation of an instance
*/
toObject: function(propertiesToInclude) {
return extend(this.callSuper('toObject', propertiesToInclude), {
points: this.points.concat()
});
},
/* _TO_SVG_START_ */
/**
* Returns svg representation of an instance
* @return {Array} an array of strings with the specific svg representation
* of the instance
*/
_toSVG: function() {
var points = [], diffX = this.pathOffset.x, diffY = this.pathOffset.y,
NUM_FRACTION_DIGITS = fabric.Object.NUM_FRACTION_DIGITS;
for (var i = 0, len = this.points.length; i < len; i++) {
points.push(
toFixed(this.points[i].x - diffX, NUM_FRACTION_DIGITS), ',',
toFixed(this.points[i].y - diffY, NUM_FRACTION_DIGITS), ' '
);
}
return [
'<' + this.type + ' ', 'COMMON_PARTS',
'points="', points.join(''),
'" />\n'
];
},
/* _TO_SVG_END_ */
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
commonRender: function(ctx) {
var point, len = this.points.length,
x = this.pathOffset.x,
y = this.pathOffset.y;
if (!len || isNaN(this.points[len - 1].y)) {
// do not draw if no points or odd points
// NaN comes from parseFloat of a empty string in parser
return false;
}
ctx.beginPath();
ctx.moveTo(this.points[0].x - x, this.points[0].y - y);
for (var i = 0; i < len; i++) {
point = this.points[i];
ctx.lineTo(point.x - x, point.y - y);
}
return true;
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_render: function(ctx) {
if (!this.commonRender(ctx)) {
return;
}
this._renderPaintInOrder(ctx);
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_renderDashedStroke: function(ctx) {
var p1, p2;
ctx.beginPath();
for (var i = 0, len = this.points.length; i < len; i++) {
p1 = this.points[i];
p2 = this.points[i + 1] || p1;
fabric.util.drawDashedLine(ctx, p1.x, p1.y, p2.x, p2.y, this.strokeDashArray);
}
},
/**
* Returns complexity of an instance
* @return {Number} complexity of this instance
*/
complexity: function() {
return this.get('points').length;
}
});
/* _FROM_SVG_START_ */
/**
* List of attribute names to account for when parsing SVG element (used by {@link fabric.Polyline.fromElement})
* @static
* @memberOf fabric.Polyline
* @see: http://www.w3.org/TR/SVG/shapes.html#PolylineElement
*/
fabric.Polyline.ATTRIBUTE_NAMES = fabric.SHARED_ATTRIBUTES.concat();
/**
* Returns fabric.Polyline instance from an SVG element
* @static
* @memberOf fabric.Polyline
* @param {SVGElement} element Element to parser
* @param {Function} callback callback function invoked after parsing
* @param {Object} [options] Options object
*/
fabric.Polyline.fromElementGenerator = function(_class) {
return function(element, callback, options) {
if (!element) {
return callback(null);
}
options || (options = { });
var points = fabric.parsePointsAttribute(element.getAttribute('points')),
parsedAttributes = fabric.parseAttributes(element, fabric[_class].ATTRIBUTE_NAMES);
parsedAttributes.fromSVG = true;
callback(new fabric[_class](points, extend(parsedAttributes, options)));
};
};
fabric.Polyline.fromElement = fabric.Polyline.fromElementGenerator('Polyline');
/* _FROM_SVG_END_ */
/**
* Returns fabric.Polyline instance from an object representation
* @static
* @memberOf fabric.Polyline
* @param {Object} object Object to create an instance from
* @param {Function} [callback] Callback to invoke when an fabric.Path instance is created
*/
fabric.Polyline.fromObject = function(object, callback) {
return fabric.Object._fromObject('Polyline', object, callback, 'points');
};
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
'use strict';
var fabric = global.fabric || (global.fabric = { });
if (fabric.Polygon) {
fabric.warn('fabric.Polygon is already defined');
return;
}
/**
* Polygon class
* @class fabric.Polygon
* @extends fabric.Polyline
* @see {@link fabric.Polygon#initialize} for constructor definition
*/
fabric.Polygon = fabric.util.createClass(fabric.Polyline, /** @lends fabric.Polygon.prototype */ {
/**
* Type of an object
* @type String
* @default
*/
type: 'polygon',
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_render: function(ctx) {
if (!this.commonRender(ctx)) {
return;
}
ctx.closePath();
this._renderPaintInOrder(ctx);
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_renderDashedStroke: function(ctx) {
this.callSuper('_renderDashedStroke', ctx);
ctx.closePath();
},
});
/* _FROM_SVG_START_ */
/**
* List of attribute names to account for when parsing SVG element (used by `fabric.Polygon.fromElement`)
* @static
* @memberOf fabric.Polygon
* @see: http://www.w3.org/TR/SVG/shapes.html#PolygonElement
*/
fabric.Polygon.ATTRIBUTE_NAMES = fabric.SHARED_ATTRIBUTES.concat();
/**
* Returns {@link fabric.Polygon} instance from an SVG element
* @static
* @memberOf fabric.Polygon
* @param {SVGElement} element Element to parse
* @param {Function} callback callback function invoked after parsing
* @param {Object} [options] Options object
*/
fabric.Polygon.fromElement = fabric.Polyline.fromElementGenerator('Polygon');
/* _FROM_SVG_END_ */
/**
* Returns fabric.Polygon instance from an object representation
* @static
* @memberOf fabric.Polygon
* @param {Object} object Object to create an instance from
* @param {Function} [callback] Callback to invoke when an fabric.Path instance is created
*/
fabric.Polygon.fromObject = function(object, callback) {
return fabric.Object._fromObject('Polygon', object, callback, 'points');
};
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
'use strict';
var fabric = global.fabric || (global.fabric = { }),
min = fabric.util.array.min,
max = fabric.util.array.max,
extend = fabric.util.object.extend,
_toString = Object.prototype.toString,
drawArc = fabric.util.drawArc,
toFixed = fabric.util.toFixed,
commandLengths = {
m: 2,
l: 2,
h: 1,
v: 1,
c: 6,
s: 4,
q: 4,
t: 2,
a: 7
},
repeatedCommands = {
m: 'l',
M: 'L'
};
if (fabric.Path) {
fabric.warn('fabric.Path is already defined');
return;
}
/**
* Path class
* @class fabric.Path
* @extends fabric.Object
* @tutorial {@link http://fabricjs.com/fabric-intro-part-1#path_and_pathgroup}
* @see {@link fabric.Path#initialize} for constructor definition
*/
fabric.Path = fabric.util.createClass(fabric.Object, /** @lends fabric.Path.prototype */ {
/**
* Type of an object
* @type String
* @default
*/
type: 'path',
/**
* Array of path points
* @type Array
* @default
*/
path: null,
cacheProperties: fabric.Object.prototype.cacheProperties.concat('path', 'fillRule'),
stateProperties: fabric.Object.prototype.stateProperties.concat('path'),
/**
* Constructor
* @param {Array|String} path Path data (sequence of coordinates and corresponding "command" tokens)
* @param {Object} [options] Options object
* @return {fabric.Path} thisArg
*/
initialize: function(path, options) {
options = options || { };
this.callSuper('initialize', options);
if (!path) {
path = [];
}
var fromArray = _toString.call(path) === '[object Array]';
this.path = fromArray
? path
// one of commands (m,M,l,L,q,Q,c,C,etc.) followed by non-command characters (i.e. command values)
: path.match && path.match(/[mzlhvcsqta][^mzlhvcsqta]*/gi);
if (!this.path) {
return;
}
if (!fromArray) {
this.path = this._parsePath();
}
fabric.Polyline.prototype._setPositionDimensions.call(this, options);
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx context to render path on
*/
_renderPathCommands: function(ctx) {
var current, // current instruction
previous = null,
subpathStartX = 0,
subpathStartY = 0,
x = 0, // current x
y = 0, // current y
controlX = 0, // current control point x
controlY = 0, // current control point y
tempX,
tempY,
l = -this.pathOffset.x,
t = -this.pathOffset.y;
ctx.beginPath();
for (var i = 0, len = this.path.length; i < len; ++i) {
current = this.path[i];
switch (current[0]) { // first letter
case 'l': // lineto, relative
x += current[1];
y += current[2];
ctx.lineTo(x + l, y + t);
break;
case 'L': // lineto, absolute
x = current[1];
y = current[2];
ctx.lineTo(x + l, y + t);
break;
case 'h': // horizontal lineto, relative
x += current[1];
ctx.lineTo(x + l, y + t);
break;
case 'H': // horizontal lineto, absolute
x = current[1];
ctx.lineTo(x + l, y + t);
break;
case 'v': // vertical lineto, relative
y += current[1];
ctx.lineTo(x + l, y + t);
break;
case 'V': // verical lineto, absolute
y = current[1];
ctx.lineTo(x + l, y + t);
break;
case 'm': // moveTo, relative
x += current[1];
y += current[2];
subpathStartX = x;
subpathStartY = y;
ctx.moveTo(x + l, y + t);
break;
case 'M': // moveTo, absolute
x = current[1];
y = current[2];
subpathStartX = x;
subpathStartY = y;
ctx.moveTo(x + l, y + t);
break;
case 'c': // bezierCurveTo, relative
tempX = x + current[5];
tempY = y + current[6];
controlX = x + current[3];
controlY = y + current[4];
ctx.bezierCurveTo(
x + current[1] + l, // x1
y + current[2] + t, // y1
controlX + l, // x2
controlY + t, // y2
tempX + l,
tempY + t
);
x = tempX;
y = tempY;
break;
case 'C': // bezierCurveTo, absolute
x = current[5];
y = current[6];
controlX = current[3];
controlY = current[4];
ctx.bezierCurveTo(
current[1] + l,
current[2] + t,
controlX + l,
controlY + t,
x + l,
y + t
);
break;
case 's': // shorthand cubic bezierCurveTo, relative
// transform to absolute x,y
tempX = x + current[3];
tempY = y + current[4];
if (previous[0].match(/[CcSs]/) === null) {
// If there is no previous command or if the previous command was not a C, c, S, or s,
// the control point is coincident with the current point
controlX = x;
controlY = y;
}
else {
// calculate reflection of previous control points
controlX = 2 * x - controlX;
controlY = 2 * y - controlY;
}
ctx.bezierCurveTo(
controlX + l,
controlY + t,
x + current[1] + l,
y + current[2] + t,
tempX + l,
tempY + t
);
// set control point to 2nd one of this command
// "... the first control point is assumed to be
// the reflection of the second control point on
// the previous command relative to the current point."
controlX = x + current[1];
controlY = y + current[2];
x = tempX;
y = tempY;
break;
case 'S': // shorthand cubic bezierCurveTo, absolute
tempX = current[3];
tempY = current[4];
if (previous[0].match(/[CcSs]/) === null) {
// If there is no previous command or if the previous command was not a C, c, S, or s,
// the control point is coincident with the current point
controlX = x;
controlY = y;
}
else {
// calculate reflection of previous control points
controlX = 2 * x - controlX;
controlY = 2 * y - controlY;
}
ctx.bezierCurveTo(
controlX + l,
controlY + t,
current[1] + l,
current[2] + t,
tempX + l,
tempY + t
);
x = tempX;
y = tempY;
// set control point to 2nd one of this command
// "... the first control point is assumed to be
// the reflection of the second control point on
// the previous command relative to the current point."
controlX = current[1];
controlY = current[2];
break;
case 'q': // quadraticCurveTo, relative
// transform to absolute x,y
tempX = x + current[3];
tempY = y + current[4];
controlX = x + current[1];
controlY = y + current[2];
ctx.quadraticCurveTo(
controlX + l,
controlY + t,
tempX + l,
tempY + t
);
x = tempX;
y = tempY;
break;
case 'Q': // quadraticCurveTo, absolute
tempX = current[3];
tempY = current[4];
ctx.quadraticCurveTo(
current[1] + l,
current[2] + t,
tempX + l,
tempY + t
);
x = tempX;
y = tempY;
controlX = current[1];
controlY = current[2];
break;
case 't': // shorthand quadraticCurveTo, relative
// transform to absolute x,y
tempX = x + current[1];
tempY = y + current[2];
if (previous[0].match(/[QqTt]/) === null) {
// If there is no previous command or if the previous command was not a Q, q, T or t,
// assume the control point is coincident with the current point
controlX = x;
controlY = y;
}
else {
// calculate reflection of previous control point
controlX = 2 * x - controlX;
controlY = 2 * y - controlY;
}
ctx.quadraticCurveTo(
controlX + l,
controlY + t,
tempX + l,
tempY + t
);
x = tempX;
y = tempY;
break;
case 'T':
tempX = current[1];
tempY = current[2];
if (previous[0].match(/[QqTt]/) === null) {
// If there is no previous command or if the previous command was not a Q, q, T or t,
// assume the control point is coincident with the current point
controlX = x;
controlY = y;
}
else {
// calculate reflection of previous control point
controlX = 2 * x - controlX;
controlY = 2 * y - controlY;
}
ctx.quadraticCurveTo(
controlX + l,
controlY + t,
tempX + l,
tempY + t
);
x = tempX;
y = tempY;
break;
case 'a':
// TODO: optimize this
drawArc(ctx, x + l, y + t, [
current[1],
current[2],
current[3],
current[4],
current[5],
current[6] + x + l,
current[7] + y + t
]);
x += current[6];
y += current[7];
break;
case 'A':
// TODO: optimize this
drawArc(ctx, x + l, y + t, [
current[1],
current[2],
current[3],
current[4],
current[5],
current[6] + l,
current[7] + t
]);
x = current[6];
y = current[7];
break;
case 'z':
case 'Z':
x = subpathStartX;
y = subpathStartY;
ctx.closePath();
break;
}
previous = current;
}
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx context to render path on
*/
_render: function(ctx) {
this._renderPathCommands(ctx);
this._renderPaintInOrder(ctx);
},
/**
* Returns string representation of an instance
* @return {String} string representation of an instance
*/
toString: function() {
return '#<fabric.Path (' + this.complexity() +
'): { "top": ' + this.top + ', "left": ' + this.left + ' }>';
},
/**
* Returns object representation of an instance
* @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output
* @return {Object} object representation of an instance
*/
toObject: function(propertiesToInclude) {
return extend(this.callSuper('toObject', propertiesToInclude), {
path: this.path.map(function(item) { return item.slice(); }),
});
},
/**
* Returns dataless object representation of an instance
* @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output
* @return {Object} object representation of an instance
*/
toDatalessObject: function(propertiesToInclude) {
var o = this.toObject(['sourcePath'].concat(propertiesToInclude));
if (o.sourcePath) {
delete o.path;
}
return o;
},
/* _TO_SVG_START_ */
/**
* Returns svg representation of an instance
* @return {Array} an array of strings with the specific svg representation
* of the instance
*/
_toSVG: function() {
var path = this.path.map(function(path) {
return path.join(' ');
}).join(' ');
return [
'<path ', 'COMMON_PARTS',
'd="', path,
'" stroke-linecap="round" ',
'/>\n'
];
},
_getOffsetTransform: function() {
var digits = fabric.Object.NUM_FRACTION_DIGITS;
return ' translate(' + toFixed(-this.pathOffset.x, digits) + ', ' +
toFixed(-this.pathOffset.y, digits) + ')';
},
/**
* Returns svg clipPath representation of an instance
* @param {Function} [reviver] Method for further parsing of svg representation.
* @return {String} svg representation of an instance
*/
toClipPathSVG: function(reviver) {
var additionalTransform = this._getOffsetTransform();
return '\t' + this._createBaseClipPathSVGMarkup(
this._toSVG(), { reviver: reviver, additionalTransform: additionalTransform }
);
},
/**
* Returns svg representation of an instance
* @param {Function} [reviver] Method for further parsing of svg representation.
* @return {String} svg representation of an instance
*/
toSVG: function(reviver) {
var additionalTransform = this._getOffsetTransform();
return this._createBaseSVGMarkup(this._toSVG(), { reviver: reviver, additionalTransform: additionalTransform });
},
/* _TO_SVG_END_ */
/**
* Returns number representation of an instance complexity
* @return {Number} complexity of this instance
*/
complexity: function() {
return this.path.length;
},
/**
* @private
*/
_parsePath: function() {
var result = [],
coords = [],
currentPath,
parsed,
re = /([-+]?((\d+\.\d+)|((\d+)|(\.\d+)))(?:e[-+]?\d+)?)/ig,
match,
coordsStr;
for (var i = 0, coordsParsed, len = this.path.length; i < len; i++) {
currentPath = this.path[i];
coordsStr = currentPath.slice(1).trim();
coords.length = 0;
while ((match = re.exec(coordsStr))) {
coords.push(match[0]);
}
coordsParsed = [currentPath.charAt(0)];
for (var j = 0, jlen = coords.length; j < jlen; j++) {
parsed = parseFloat(coords[j]);
if (!isNaN(parsed)) {
coordsParsed.push(parsed);
}
}
var command = coordsParsed[0],
commandLength = commandLengths[command.toLowerCase()],
repeatedCommand = repeatedCommands[command] || command;
if (coordsParsed.length - 1 > commandLength) {
for (var k = 1, klen = coordsParsed.length; k < klen; k += commandLength) {
result.push([command].concat(coordsParsed.slice(k, k + commandLength)));
command = repeatedCommand;
}
}
else {
result.push(coordsParsed);
}
}
return result;
},
/**
* @private
*/
_calcDimensions: function() {
var aX = [],
aY = [],
current, // current instruction
previous = null,
subpathStartX = 0,
subpathStartY = 0,
x = 0, // current x
y = 0, // current y
controlX = 0, // current control point x
controlY = 0, // current control point y
tempX,
tempY,
bounds;
for (var i = 0, len = this.path.length; i < len; ++i) {
current = this.path[i];
switch (current[0]) { // first letter
case 'l': // lineto, relative
x += current[1];
y += current[2];
bounds = [];
break;
case 'L': // lineto, absolute
x = current[1];
y = current[2];
bounds = [];
break;
case 'h': // horizontal lineto, relative
x += current[1];
bounds = [];
break;
case 'H': // horizontal lineto, absolute
x = current[1];
bounds = [];
break;
case 'v': // vertical lineto, relative
y += current[1];
bounds = [];
break;
case 'V': // verical lineto, absolute
y = current[1];
bounds = [];
break;
case 'm': // moveTo, relative
x += current[1];
y += current[2];
subpathStartX = x;
subpathStartY = y;
bounds = [];
break;
case 'M': // moveTo, absolute
x = current[1];
y = current[2];
subpathStartX = x;
subpathStartY = y;
bounds = [];
break;
case 'c': // bezierCurveTo, relative
tempX = x + current[5];
tempY = y + current[6];
controlX = x + current[3];
controlY = y + current[4];
bounds = fabric.util.getBoundsOfCurve(x, y,
x + current[1], // x1
y + current[2], // y1
controlX, // x2
controlY, // y2
tempX,
tempY
);
x = tempX;
y = tempY;
break;
case 'C': // bezierCurveTo, absolute
controlX = current[3];
controlY = current[4];
bounds = fabric.util.getBoundsOfCurve(x, y,
current[1],
current[2],
controlX,
controlY,
current[5],
current[6]
);
x = current[5];
y = current[6];
break;
case 's': // shorthand cubic bezierCurveTo, relative
// transform to absolute x,y
tempX = x + current[3];
tempY = y + current[4];
if (previous[0].match(/[CcSs]/) === null) {
// If there is no previous command or if the previous command was not a C, c, S, or s,
// the control point is coincident with the current point
controlX = x;
controlY = y;
}
else {
// calculate reflection of previous control points
controlX = 2 * x - controlX;
controlY = 2 * y - controlY;
}
bounds = fabric.util.getBoundsOfCurve(x, y,
controlX,
controlY,
x + current[1],
y + current[2],
tempX,
tempY
);
// set control point to 2nd one of this command
// "... the first control point is assumed to be
// the reflection of the second control point on
// the previous command relative to the current point."
controlX = x + current[1];
controlY = y + current[2];
x = tempX;
y = tempY;
break;
case 'S': // shorthand cubic bezierCurveTo, absolute
tempX = current[3];
tempY = current[4];
if (previous[0].match(/[CcSs]/) === null) {
// If there is no previous command or if the previous command was not a C, c, S, or s,
// the control point is coincident with the current point
controlX = x;
controlY = y;
}
else {
// calculate reflection of previous control points
controlX = 2 * x - controlX;
controlY = 2 * y - controlY;
}
bounds = fabric.util.getBoundsOfCurve(x, y,
controlX,
controlY,
current[1],
current[2],
tempX,
tempY
);
x = tempX;
y = tempY;
// set control point to 2nd one of this command
// "... the first control point is assumed to be
// the reflection of the second control point on
// the previous command relative to the current point."
controlX = current[1];
controlY = current[2];
break;
case 'q': // quadraticCurveTo, relative
// transform to absolute x,y
tempX = x + current[3];
tempY = y + current[4];
controlX = x + current[1];
controlY = y + current[2];
bounds = fabric.util.getBoundsOfCurve(x, y,
controlX,
controlY,
controlX,
controlY,
tempX,
tempY
);
x = tempX;
y = tempY;
break;
case 'Q': // quadraticCurveTo, absolute
controlX = current[1];
controlY = current[2];
bounds = fabric.util.getBoundsOfCurve(x, y,
controlX,
controlY,
controlX,
controlY,
current[3],
current[4]
);
x = current[3];
y = current[4];
break;
case 't': // shorthand quadraticCurveTo, relative
// transform to absolute x,y
tempX = x + current[1];
tempY = y + current[2];
if (previous[0].match(/[QqTt]/) === null) {
// If there is no previous command or if the previous command was not a Q, q, T or t,
// assume the control point is coincident with the current point
controlX = x;
controlY = y;
}
else {
// calculate reflection of previous control point
controlX = 2 * x - controlX;
controlY = 2 * y - controlY;
}
bounds = fabric.util.getBoundsOfCurve(x, y,
controlX,
controlY,
controlX,
controlY,
tempX,
tempY
);
x = tempX;
y = tempY;
break;
case 'T':
tempX = current[1];
tempY = current[2];
if (previous[0].match(/[QqTt]/) === null) {
// If there is no previous command or if the previous command was not a Q, q, T or t,
// assume the control point is coincident with the current point
controlX = x;
controlY = y;
}
else {
// calculate reflection of previous control point
controlX = 2 * x - controlX;
controlY = 2 * y - controlY;
}
bounds = fabric.util.getBoundsOfCurve(x, y,
controlX,
controlY,
controlX,
controlY,
tempX,
tempY
);
x = tempX;
y = tempY;
break;
case 'a':
// TODO: optimize this
bounds = fabric.util.getBoundsOfArc(x, y,
current[1],
current[2],
current[3],
current[4],
current[5],
current[6] + x,
current[7] + y
);
x += current[6];
y += current[7];
break;
case 'A':
// TODO: optimize this
bounds = fabric.util.getBoundsOfArc(x, y,
current[1],
current[2],
current[3],
current[4],
current[5],
current[6],
current[7]
);
x = current[6];
y = current[7];
break;
case 'z':
case 'Z':
x = subpathStartX;
y = subpathStartY;
break;
}
previous = current;
bounds.forEach(function (point) {
aX.push(point.x);
aY.push(point.y);
});
aX.push(x);
aY.push(y);
}
var minX = min(aX) || 0,
minY = min(aY) || 0,
maxX = max(aX) || 0,
maxY = max(aY) || 0,
deltaX = maxX - minX,
deltaY = maxY - minY;
return {
left: minX,
top: minY,
width: deltaX,
height: deltaY
};
}
});
/**
* Creates an instance of fabric.Path from an object
* @static
* @memberOf fabric.Path
* @param {Object} object
* @param {Function} [callback] Callback to invoke when an fabric.Path instance is created
*/
fabric.Path.fromObject = function(object, callback) {
if (typeof object.sourcePath === 'string') {
var pathUrl = object.sourcePath;
fabric.loadSVGFromURL(pathUrl, function (elements) {
var path = elements[0];
path.setOptions(object);
callback && callback(path);
});
}
else {
fabric.Object._fromObject('Path', object, callback, 'path');
}
};
/* _FROM_SVG_START_ */
/**
* List of attribute names to account for when parsing SVG element (used by `fabric.Path.fromElement`)
* @static
* @memberOf fabric.Path
* @see http://www.w3.org/TR/SVG/paths.html#PathElement
*/
fabric.Path.ATTRIBUTE_NAMES = fabric.SHARED_ATTRIBUTES.concat(['d']);
/**
* Creates an instance of fabric.Path from an SVG <path> element
* @static
* @memberOf fabric.Path
* @param {SVGElement} element to parse
* @param {Function} callback Callback to invoke when an fabric.Path instance is created
* @param {Object} [options] Options object
* @param {Function} [callback] Options callback invoked after parsing is finished
*/
fabric.Path.fromElement = function(element, callback, options) {
var parsedAttributes = fabric.parseAttributes(element, fabric.Path.ATTRIBUTE_NAMES);
parsedAttributes.fromSVG = true;
callback(new fabric.Path(parsedAttributes.d, extend(parsedAttributes, options)));
};
/* _FROM_SVG_END_ */
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
'use strict';
var fabric = global.fabric || (global.fabric = { }),
min = fabric.util.array.min,
max = fabric.util.array.max;
if (fabric.Group) {
return;
}
/**
* Group class
* @class fabric.Group
* @extends fabric.Object
* @mixes fabric.Collection
* @tutorial {@link http://fabricjs.com/fabric-intro-part-3#groups}
* @see {@link fabric.Group#initialize} for constructor definition
*/
fabric.Group = fabric.util.createClass(fabric.Object, fabric.Collection, /** @lends fabric.Group.prototype */ {
/**
* Type of an object
* @type String
* @default
*/
type: 'group',
/**
* Width of stroke
* @type Number
* @default
*/
strokeWidth: 0,
/**
* Indicates if click events should also check for subtargets
* @type Boolean
* @default
*/
subTargetCheck: false,
/**
* Groups are container, do not render anything on theyr own, ence no cache properties
* @type Array
* @default
*/
cacheProperties: [],
/**
* setOnGroup is a method used for TextBox that is no more used since 2.0.0 The behavior is still
* available setting this boolean to true.
* @type Boolean
* @since 2.0.0
* @default
*/
useSetOnGroup: false,
/**
* Constructor
* @param {Object} objects Group objects
* @param {Object} [options] Options object
* @param {Boolean} [isAlreadyGrouped] if true, objects have been grouped already.
* @return {Object} thisArg
*/
initialize: function(objects, options, isAlreadyGrouped) {
options = options || {};
this._objects = [];
// if objects enclosed in a group have been grouped already,
// we cannot change properties of objects.
// Thus we need to set options to group without objects,
isAlreadyGrouped && this.callSuper('initialize', options);
this._objects = objects || [];
for (var i = this._objects.length; i--; ) {
this._objects[i].group = this;
}
if (!isAlreadyGrouped) {
var center = options && options.centerPoint;
// we want to set origins before calculating the bounding box.
// so that the topleft can be set with that in mind.
// if specific top and left are passed, are overwritten later
// with the callSuper('initialize', options)
if (options.originX !== undefined) {
this.originX = options.originX;
}
if (options.originY !== undefined) {
this.originY = options.originY;
}
// if coming from svg i do not want to calc bounds.
// i assume width and height are passed along options
center || this._calcBounds();
this._updateObjectsCoords(center);
delete options.centerPoint;
this.callSuper('initialize', options);
}
else {
this._updateObjectsACoords();
}
this.setCoords();
},
/**
* @private
* @param {Boolean} [skipCoordsChange] if true, coordinates of objects enclosed in a group do not change
*/
_updateObjectsACoords: function() {
var ignoreZoom = true, skipAbsolute = true;
for (var i = this._objects.length; i--; ){
this._objects[i].setCoords(ignoreZoom, skipAbsolute);
}
},
/**
* @private
* @param {Boolean} [skipCoordsChange] if true, coordinates of objects enclosed in a group do not change
*/
_updateObjectsCoords: function(center) {
var center = center || this.getCenterPoint();
for (var i = this._objects.length; i--; ){
this._updateObjectCoords(this._objects[i], center);
}
},
/**
* @private
* @param {Object} object
* @param {fabric.Point} center, current center of group.
*/
_updateObjectCoords: function(object, center) {
var objectLeft = object.left,
objectTop = object.top,
ignoreZoom = true, skipAbsolute = true;
object.set({
left: objectLeft - center.x,
top: objectTop - center.y
});
object.group = this;
object.setCoords(ignoreZoom, skipAbsolute);
},
/**
* Returns string represenation of a group
* @return {String}
*/
toString: function() {
return '#<fabric.Group: (' + this.complexity() + ')>';
},
/**
* Adds an object to a group; Then recalculates group's dimension, position.
* @param {Object} object
* @return {fabric.Group} thisArg
* @chainable
*/
addWithUpdate: function(object) {
this._restoreObjectsState();
fabric.util.resetObjectTransform(this);
if (object) {
this._objects.push(object);
object.group = this;
object._set('canvas', this.canvas);
}
this._calcBounds();
this._updateObjectsCoords();
this.setCoords();
this.dirty = true;
return this;
},
/**
* Removes an object from a group; Then recalculates group's dimension, position.
* @param {Object} object
* @return {fabric.Group} thisArg
* @chainable
*/
removeWithUpdate: function(object) {
this._restoreObjectsState();
fabric.util.resetObjectTransform(this);
this.remove(object);
this._calcBounds();
this._updateObjectsCoords();
this.setCoords();
this.dirty = true;
return this;
},
/**
* @private
*/
_onObjectAdded: function(object) {
this.dirty = true;
object.group = this;
object._set('canvas', this.canvas);
},
/**
* @private
*/
_onObjectRemoved: function(object) {
this.dirty = true;
delete object.group;
},
/**
* @private
*/
_set: function(key, value) {
var i = this._objects.length;
if (this.useSetOnGroup) {
while (i--) {
this._objects[i].setOnGroup(key, value);
}
}
if (key === 'canvas') {
while (i--) {
this._objects[i]._set(key, value);
}
}
fabric.Object.prototype._set.call(this, key, value);
},
/**
* Returns object representation of an instance
* @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output
* @return {Object} object representation of an instance
*/
toObject: function(propertiesToInclude) {
var _includeDefaultValues = this.includeDefaultValues;
var objsToObject = this._objects.map(function(obj) {
var originalDefaults = obj.includeDefaultValues;
obj.includeDefaultValues = _includeDefaultValues;
var _obj = obj.toObject(propertiesToInclude);
obj.includeDefaultValues = originalDefaults;
return _obj;
});
var obj = fabric.Object.prototype.toObject.call(this, propertiesToInclude);
obj.objects = objsToObject;
return obj;
},
/**
* Returns object representation of an instance, in dataless mode.
* @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output
* @return {Object} object representation of an instance
*/
toDatalessObject: function(propertiesToInclude) {
var objsToObject, sourcePath = this.sourcePath;
if (sourcePath) {
objsToObject = sourcePath;
}
else {
var _includeDefaultValues = this.includeDefaultValues;
objsToObject = this._objects.map(function(obj) {
var originalDefaults = obj.includeDefaultValues;
obj.includeDefaultValues = _includeDefaultValues;
var _obj = obj.toDatalessObject(propertiesToInclude);
obj.includeDefaultValues = originalDefaults;
return _obj;
});
}
var obj = fabric.Object.prototype.toDatalessObject.call(this, propertiesToInclude);
obj.objects = objsToObject;
return obj;
},
/**
* Renders instance on a given context
* @param {CanvasRenderingContext2D} ctx context to render instance on
*/
render: function(ctx) {
this._transformDone = true;
this.callSuper('render', ctx);
this._transformDone = false;
},
/**
* Decide if the object should cache or not. Create its own cache level
* needsItsOwnCache should be used when the object drawing method requires
* a cache step. None of the fabric classes requires it.
* Generally you do not cache objects in groups because the group is already cached.
* @return {Boolean}
*/
shouldCache: function() {
var ownCache = fabric.Object.prototype.shouldCache.call(this);
if (ownCache) {
for (var i = 0, len = this._objects.length; i < len; i++) {
if (this._objects[i].willDrawShadow()) {
this.ownCaching = false;
return false;
}
}
}
return ownCache;
},
/**
* Check if this object or a child object will cast a shadow
* @return {Boolean}
*/
willDrawShadow: function() {
if (this.shadow) {
return fabric.Object.prototype.willDrawShadow.call(this);
}
for (var i = 0, len = this._objects.length; i < len; i++) {
if (this._objects[i].willDrawShadow()) {
return true;
}
}
return false;
},
/**
* Check if this group or its parent group are caching, recursively up
* @return {Boolean}
*/
isOnACache: function() {
return this.ownCaching || (this.group && this.group.isOnACache());
},
/**
* Execute the drawing operation for an object on a specified context
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
drawObject: function(ctx) {
for (var i = 0, len = this._objects.length; i < len; i++) {
this._objects[i].render(ctx);
}
this._drawClipPath(ctx);
},
/**
* Check if cache is dirty
*/
isCacheDirty: function(skipCanvas) {
if (this.callSuper('isCacheDirty', skipCanvas)) {
return true;
}
if (!this.statefullCache) {
return false;
}
for (var i = 0, len = this._objects.length; i < len; i++) {
if (this._objects[i].isCacheDirty(true)) {
if (this._cacheCanvas) {
// if this group has not a cache canvas there is nothing to clean
var x = this.cacheWidth / this.zoomX, y = this.cacheHeight / this.zoomY;
this._cacheContext.clearRect(-x / 2, -y / 2, x, y);
}
return true;
}
}
return false;
},
/**
* Retores original state of each of group objects (original state is that which was before group was created).
* @private
* @return {fabric.Group} thisArg
* @chainable
*/
_restoreObjectsState: function() {
this._objects.forEach(this._restoreObjectState, this);
return this;
},
/**
* Realises the transform from this group onto the supplied object
* i.e. it tells you what would happen if the supplied object was in
* the group, and then the group was destroyed. It mutates the supplied
* object.
* @param {fabric.Object} object
* @return {fabric.Object} transformedObject
*/
realizeTransform: function(object) {
var matrix = object.calcTransformMatrix(),
options = fabric.util.qrDecompose(matrix),
center = new fabric.Point(options.translateX, options.translateY);
object.flipX = false;
object.flipY = false;
object.set('scaleX', options.scaleX);
object.set('scaleY', options.scaleY);
object.skewX = options.skewX;
object.skewY = options.skewY;
object.angle = options.angle;
object.setPositionByOrigin(center, 'center', 'center');
return object;
},
/**
* Restores original state of a specified object in group
* @private
* @param {fabric.Object} object
* @return {fabric.Group} thisArg
*/
_restoreObjectState: function(object) {
this.realizeTransform(object);
object.setCoords();
delete object.group;
return this;
},
/**
* Destroys a group (restoring state of its objects)
* @return {fabric.Group} thisArg
* @chainable
*/
destroy: function() {
// when group is destroyed objects needs to get a repaint to be eventually
// displayed on canvas.
this._objects.forEach(function(object) {
object.set('dirty', true);
});
return this._restoreObjectsState();
},
/**
* make a group an active selection, remove the group from canvas
* the group has to be on canvas for this to work.
* @return {fabric.ActiveSelection} thisArg
* @chainable
*/
toActiveSelection: function() {
if (!this.canvas) {
return;
}
var objects = this._objects, canvas = this.canvas;
this._objects = [];
var options = this.toObject();
delete options.objects;
var activeSelection = new fabric.ActiveSelection([]);
activeSelection.set(options);
activeSelection.type = 'activeSelection';
canvas.remove(this);
objects.forEach(function(object) {
object.group = activeSelection;
object.dirty = true;
canvas.add(object);
});
activeSelection.canvas = canvas;
activeSelection._objects = objects;
canvas._activeObject = activeSelection;
activeSelection.setCoords();
return activeSelection;
},
/**
* Destroys a group (restoring state of its objects)
* @return {fabric.Group} thisArg
* @chainable
*/
ungroupOnCanvas: function() {
return this._restoreObjectsState();
},
/**
* Sets coordinates of all objects inside group
* @return {fabric.Group} thisArg
* @chainable
*/
setObjectsCoords: function() {
var ignoreZoom = true, skipAbsolute = true;
this.forEachObject(function(object) {
object.setCoords(ignoreZoom, skipAbsolute);
});
return this;
},
/**
* @private
*/
_calcBounds: function(onlyWidthHeight) {
var aX = [],
aY = [],
o, prop,
props = ['tr', 'br', 'bl', 'tl'],
i = 0, iLen = this._objects.length,
j, jLen = props.length,
ignoreZoom = true;
for ( ; i < iLen; ++i) {
o = this._objects[i];
o.setCoords(ignoreZoom);
for (j = 0; j < jLen; j++) {
prop = props[j];
aX.push(o.oCoords[prop].x);
aY.push(o.oCoords[prop].y);
}
}
this._getBounds(aX, aY, onlyWidthHeight);
},
/**
* @private
*/
_getBounds: function(aX, aY, onlyWidthHeight) {
var minXY = new fabric.Point(min(aX), min(aY)),
maxXY = new fabric.Point(max(aX), max(aY)),
top = minXY.y || 0, left = minXY.x || 0,
width = (maxXY.x - minXY.x) || 0,
height = (maxXY.y - minXY.y) || 0;
this.width = width;
this.height = height;
if (!onlyWidthHeight) {
// the bounding box always finds the topleft most corner.
// whatever is the group origin, we set up here the left/top position.
this.setPositionByOrigin({ x: left, y: top }, 'left', 'top');
}
},
/* _TO_SVG_START_ */
/**
* Returns svg representation of an instance
* @param {Function} [reviver] Method for further parsing of svg representation.
* @return {String} svg representation of an instance
*/
_toSVG: function(reviver) {
var svgString = ['<g ', 'COMMON_PARTS', ' >\n'];
for (var i = 0, len = this._objects.length; i < len; i++) {
svgString.push('\t\t', this._objects[i].toSVG(reviver));
}
svgString.push('</g>\n');
return svgString;
},
/**
* Returns styles-string for svg-export, specific version for group
* @return {String}
*/
getSvgStyles: function() {
var opacity = typeof this.opacity !== 'undefined' && this.opacity !== 1 ?
'opacity: ' + this.opacity + ';' : '',
visibility = this.visible ? '' : ' visibility: hidden;';
return [
opacity,
this.getSvgFilter(),
visibility
].join('');
},
/**
* Returns svg clipPath representation of an instance
* @param {Function} [reviver] Method for further parsing of svg representation.
* @return {String} svg representation of an instance
*/
toClipPathSVG: function(reviver) {
var svgString = [];
for (var i = 0, len = this._objects.length; i < len; i++) {
svgString.push('\t', this._objects[i].toClipPathSVG(reviver));
}
return this._createBaseClipPathSVGMarkup(svgString, { reviver: reviver });
},
/* _TO_SVG_END_ */
});
/**
* Returns {@link fabric.Group} instance from an object representation
* @static
* @memberOf fabric.Group
* @param {Object} object Object to create a group from
* @param {Function} [callback] Callback to invoke when an group instance is created
*/
fabric.Group.fromObject = function(object, callback) {
fabric.util.enlivenObjects(object.objects, function(enlivenedObjects) {
fabric.util.enlivenObjects([object.clipPath], function(enlivedClipPath) {
var options = fabric.util.object.clone(object, true);
options.clipPath = enlivedClipPath[0];
delete options.objects;
callback && callback(new fabric.Group(enlivenedObjects, options, true));
});
});
};
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
'use strict';
var fabric = global.fabric || (global.fabric = { });
if (fabric.ActiveSelection) {
return;
}
/**
* Group class
* @class fabric.ActiveSelection
* @extends fabric.Group
* @tutorial {@link http://fabricjs.com/fabric-intro-part-3#groups}
* @see {@link fabric.ActiveSelection#initialize} for constructor definition
*/
fabric.ActiveSelection = fabric.util.createClass(fabric.Group, /** @lends fabric.ActiveSelection.prototype */ {
/**
* Type of an object
* @type String
* @default
*/
type: 'activeSelection',
/**
* Constructor
* @param {Object} objects ActiveSelection objects
* @param {Object} [options] Options object
* @return {Object} thisArg
*/
initialize: function(objects, options) {
options = options || {};
this._objects = objects || [];
for (var i = this._objects.length; i--; ) {
this._objects[i].group = this;
}
if (options.originX) {
this.originX = options.originX;
}
if (options.originY) {
this.originY = options.originY;
}
this._calcBounds();
this._updateObjectsCoords();
fabric.Object.prototype.initialize.call(this, options);
this.setCoords();
},
/**
* Change te activeSelection to a normal group,
* High level function that automatically adds it to canvas as
* active object. no events fired.
* @since 2.0.0
* @return {fabric.Group}
*/
toGroup: function() {
var objects = this._objects.concat();
this._objects = [];
var options = fabric.Object.prototype.toObject.call(this);
var newGroup = new fabric.Group([]);
delete options.type;
newGroup.set(options);
objects.forEach(function(object) {
object.canvas.remove(object);
object.group = newGroup;
});
newGroup._objects = objects;
if (!this.canvas) {
return newGroup;
}
var canvas = this.canvas;
canvas.add(newGroup);
canvas._activeObject = newGroup;
newGroup.setCoords();
return newGroup;
},
/**
* If returns true, deselection is cancelled.
* @since 2.0.0
* @return {Boolean} [cancel]
*/
onDeselect: function() {
this.destroy();
return false;
},
/**
* Returns string representation of a group
* @return {String}
*/
toString: function() {
return '#<fabric.ActiveSelection: (' + this.complexity() + ')>';
},
/**
* Decide if the object should cache or not. Create its own cache level
* objectCaching is a global flag, wins over everything
* needsItsOwnCache should be used when the object drawing method requires
* a cache step. None of the fabric classes requires it.
* Generally you do not cache objects in groups because the group outside is cached.
* @return {Boolean}
*/
shouldCache: function() {
return false;
},
/**
* Check if this group or its parent group are caching, recursively up
* @return {Boolean}
*/
isOnACache: function() {
return false;
},
/**
* Renders controls and borders for the object
* @param {CanvasRenderingContext2D} ctx Context to render on
* @param {Object} [styleOverride] properties to override the object style
* @param {Object} [childrenOverride] properties to override the children overrides
*/
_renderControls: function(ctx, styleOverride, childrenOverride) {
ctx.save();
ctx.globalAlpha = this.isMoving ? this.borderOpacityWhenMoving : 1;
this.callSuper('_renderControls', ctx, styleOverride);
childrenOverride = childrenOverride || { };
if (typeof childrenOverride.hasControls === 'undefined') {
childrenOverride.hasControls = false;
}
if (typeof childrenOverride.hasRotatingPoint === 'undefined') {
childrenOverride.hasRotatingPoint = false;
}
childrenOverride.forActiveSelection = true;
for (var i = 0, len = this._objects.length; i < len; i++) {
this._objects[i]._renderControls(ctx, childrenOverride);
}
ctx.restore();
},
});
/**
* Returns {@link fabric.ActiveSelection} instance from an object representation
* @static
* @memberOf fabric.ActiveSelection
* @param {Object} object Object to create a group from
* @param {Function} [callback] Callback to invoke when an ActiveSelection instance is created
*/
fabric.ActiveSelection.fromObject = function(object, callback) {
fabric.util.enlivenObjects(object.objects, function(enlivenedObjects) {
delete object.objects;
callback && callback(new fabric.ActiveSelection(enlivenedObjects, object, true));
});
};
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
'use strict';
var extend = fabric.util.object.extend;
if (!global.fabric) {
global.fabric = { };
}
if (global.fabric.Image) {
fabric.warn('fabric.Image is already defined.');
return;
}
/**
* Image class
* @class fabric.Image
* @extends fabric.Object
* @tutorial {@link http://fabricjs.com/fabric-intro-part-1#images}
* @see {@link fabric.Image#initialize} for constructor definition
*/
fabric.Image = fabric.util.createClass(fabric.Object, /** @lends fabric.Image.prototype */ {
/**
* Type of an object
* @type String
* @default
*/
type: 'image',
/**
* crossOrigin value (one of "", "anonymous", "use-credentials")
* @see https://developer.mozilla.org/en-US/docs/HTML/CORS_settings_attributes
* @type String
* @default
*/
crossOrigin: '',
/**
* Width of a stroke.
* For image quality a stroke multiple of 2 gives better results.
* @type Number
* @default
*/
strokeWidth: 0,
/**
* When calling {@link fabric.Image.getSrc}, return value from element src with `element.getAttribute('src')`.
* This allows for relative urls as image src.
* @since 2.7.0
* @type Boolean
* @default
*/
srcFromAttribute: false,
/**
* private
* contains last value of scaleX to detect
* if the Image got resized after the last Render
* @type Number
*/
_lastScaleX: 1,
/**
* private
* contains last value of scaleY to detect
* if the Image got resized after the last Render
* @type Number
*/
_lastScaleY: 1,
/**
* private
* contains last value of scaling applied by the apply filter chain
* @type Number
*/
_filterScalingX: 1,
/**
* private
* contains last value of scaling applied by the apply filter chain
* @type Number
*/
_filterScalingY: 1,
/**
* minimum scale factor under which any resizeFilter is triggered to resize the image
* 0 will disable the automatic resize. 1 will trigger automatically always.
* number bigger than 1 are not implemented yet.
* @type Number
*/
minimumScaleTrigger: 0.5,
/**
* List of properties to consider when checking if
* state of an object is changed ({@link fabric.Object#hasStateChanged})
* as well as for history (undo/redo) purposes
* @type Array
*/
stateProperties: fabric.Object.prototype.stateProperties.concat('cropX', 'cropY'),
/**
* key used to retrieve the texture representing this image
* @since 2.0.0
* @type String
* @default
*/
cacheKey: '',
/**
* Image crop in pixels from original image size.
* @since 2.0.0
* @type Number
* @default
*/
cropX: 0,
/**
* Image crop in pixels from original image size.
* @since 2.0.0
* @type Number
* @default
*/
cropY: 0,
/**
* Constructor
* @param {HTMLImageElement | String} element Image element
* @param {Object} [options] Options object
* @param {function} [callback] callback function to call after eventual filters applied.
* @return {fabric.Image} thisArg
*/
initialize: function(element, options) {
options || (options = { });
this.filters = [];
this.cacheKey = 'texture' + fabric.Object.__uid++;
this.callSuper('initialize', options);
this._initElement(element, options);
},
/**
* Returns image element which this instance if based on
* @return {HTMLImageElement} Image element
*/
getElement: function() {
return this._element || {};
},
/**
* Sets image element for this instance to a specified one.
* If filters defined they are applied to new image.
* You might need to call `canvas.renderAll` and `object.setCoords` after replacing, to render new image and update controls area.
* @param {HTMLImageElement} element
* @param {Object} [options] Options object
* @return {fabric.Image} thisArg
* @chainable
*/
setElement: function(element, options) {
this.removeTexture(this.cacheKey);
this.removeTexture(this.cacheKey + '_filtered');
this._element = element;
this._originalElement = element;
this._initConfig(options);
if (this.filters.length !== 0) {
this.applyFilters();
}
// resizeFilters work on the already filtered copy.
// we need to apply resizeFilters AFTER normal filters.
// applyResizeFilters is run more often than normal fiters
// and is triggered by user interactions rather than dev code
if (this.resizeFilter) {
this.applyResizeFilters();
}
return this;
},
/**
* Delete a single texture if in webgl mode
*/
removeTexture: function(key) {
var backend = fabric.filterBackend;
if (backend && backend.evictCachesForKey) {
backend.evictCachesForKey(key);
}
},
/**
* Delete textures, reference to elements and eventually JSDOM cleanup
*/
dispose: function() {
this.removeTexture(this.cacheKey);
this.removeTexture(this.cacheKey + '_filtered');
this._cacheContext = undefined;
['_originalElement', '_element', '_filteredEl', '_cacheCanvas'].forEach((function(element) {
fabric.util.cleanUpJsdomNode(this[element]);
this[element] = undefined;
}).bind(this));
},
/**
* Sets crossOrigin value (on an instance and corresponding image element)
* @return {fabric.Image} thisArg
* @chainable
*/
setCrossOrigin: function(value) {
this.crossOrigin = value;
this._element.crossOrigin = value;
return this;
},
/**
* Returns original size of an image
* @return {Object} Object with "width" and "height" properties
*/
getOriginalSize: function() {
var element = this.getElement();
return {
width: element.naturalWidth || element.width,
height: element.naturalHeight || element.height
};
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_stroke: function(ctx) {
if (!this.stroke || this.strokeWidth === 0) {
return;
}
var w = this.width / 2, h = this.height / 2;
ctx.beginPath();
ctx.moveTo(-w, -h);
ctx.lineTo(w, -h);
ctx.lineTo(w, h);
ctx.lineTo(-w, h);
ctx.lineTo(-w, -h);
ctx.closePath();
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_renderDashedStroke: function(ctx) {
var x = -this.width / 2,
y = -this.height / 2,
w = this.width,
h = this.height;
ctx.save();
this._setStrokeStyles(ctx, this);
ctx.beginPath();
fabric.util.drawDashedLine(ctx, x, y, x + w, y, this.strokeDashArray);
fabric.util.drawDashedLine(ctx, x + w, y, x + w, y + h, this.strokeDashArray);
fabric.util.drawDashedLine(ctx, x + w, y + h, x, y + h, this.strokeDashArray);
fabric.util.drawDashedLine(ctx, x, y + h, x, y, this.strokeDashArray);
ctx.closePath();
ctx.restore();
},
/**
* Returns object representation of an instance
* @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output
* @return {Object} Object representation of an instance
*/
toObject: function(propertiesToInclude) {
var filters = [];
this.filters.forEach(function(filterObj) {
if (filterObj) {
filters.push(filterObj.toObject());
}
});
var object = extend(
this.callSuper(
'toObject',
['crossOrigin', 'cropX', 'cropY'].concat(propertiesToInclude)
), {
src: this.getSrc(),
filters: filters,
});
if (this.resizeFilter) {
object.resizeFilter = this.resizeFilter.toObject();
}
return object;
},
/**
* Returns true if an image has crop applied, inspecting values of cropX,cropY,width,hight.
* @return {Boolean}
*/
hasCrop: function() {
return this.cropX || this.cropY || this.width < this._element.width || this.height < this._element.height;
},
/* _TO_SVG_START_ */
/**
* Returns svg representation of an instance
* @return {Array} an array of strings with the specific svg representation
* of the instance
*/
_toSVG: function() {
var svgString = [], imageMarkup = [], strokeSvg,
x = -this.width / 2, y = -this.height / 2, clipPath = '';
if (this.hasCrop()) {
var clipPathId = fabric.Object.__uid++;
svgString.push(
'<clipPath id="imageCrop_' + clipPathId + '">\n',
'\t<rect x="' + x + '" y="' + y + '" width="' + this.width + '" height="' + this.height + '" />\n',
'</clipPath>\n'
);
clipPath = ' clip-path="url(#imageCrop_' + clipPathId + ')" ';
}
imageMarkup.push('\t<image ', 'COMMON_PARTS', 'xlink:href="', this.getSvgSrc(true),
'" x="', x - this.cropX, '" y="', y - this.cropY,
// we're essentially moving origin of transformation from top/left corner to the center of the shape
// by wrapping it in container <g> element with actual transformation, then offsetting object to the top/left
// so that object's center aligns with container's left/top
'" width="', this._element.width || this._element.naturalWidth,
'" height="', this._element.height || this._element.height,
'"', clipPath,
'></image>\n');
if (this.stroke || this.strokeDashArray) {
var origFill = this.fill;
this.fill = null;
strokeSvg = [
'\t<rect ',
'x="', x, '" y="', y,
'" width="', this.width, '" height="', this.height,
'" style="', this.getSvgStyles(),
'"/>\n'
];
this.fill = origFill;
}
if (this.paintFirst !== 'fill') {
svgString = svgString.concat(strokeSvg, imageMarkup);
}
else {
svgString = svgString.concat(imageMarkup, strokeSvg);
}
return svgString;
},
/* _TO_SVG_END_ */
/**
* Returns source of an image
* @param {Boolean} filtered indicates if the src is needed for svg
* @return {String} Source of an image
*/
getSrc: function(filtered) {
var element = filtered ? this._element : this._originalElement;
if (element) {
if (element.toDataURL) {
return element.toDataURL();
}
if (this.srcFromAttribute) {
return element.getAttribute('src');
}
else {
return element.src;
}
}
else {
return this.src || '';
}
},
/**
* Sets source of an image
* @param {String} src Source string (URL)
* @param {Function} [callback] Callback is invoked when image has been loaded (and all filters have been applied)
* @param {Object} [options] Options object
* @return {fabric.Image} thisArg
* @chainable
*/
setSrc: function(src, callback, options) {
fabric.util.loadImage(src, function(img) {
this.setElement(img, options);
this._setWidthHeight();
callback && callback(this);
}, this, options && options.crossOrigin);
return this;
},
/**
* Returns string representation of an instance
* @return {String} String representation of an instance
*/
toString: function() {
return '#<fabric.Image: { src: "' + this.getSrc() + '" }>';
},
applyResizeFilters: function() {
var filter = this.resizeFilter,
minimumScale = this.minimumScaleTrigger,
objectScale = this.getTotalObjectScaling(),
scaleX = objectScale.scaleX,
scaleY = objectScale.scaleY,
elementToFilter = this._filteredEl || this._originalElement;
if (this.group) {
this.set('dirty', true);
}
if (!filter || (scaleX > minimumScale && scaleY > minimumScale)) {
this._element = elementToFilter;
this._filterScalingX = 1;
this._filterScalingY = 1;
this._lastScaleX = scaleX;
this._lastScaleY = scaleY;
return;
}
if (!fabric.filterBackend) {
fabric.filterBackend = fabric.initFilterBackend();
}
var canvasEl = fabric.util.createCanvasElement(),
cacheKey = this._filteredEl ? (this.cacheKey + '_filtered') : this.cacheKey,
sourceWidth = elementToFilter.width, sourceHeight = elementToFilter.height;
canvasEl.width = sourceWidth;
canvasEl.height = sourceHeight;
this._element = canvasEl;
this._lastScaleX = filter.scaleX = scaleX;
this._lastScaleY = filter.scaleY = scaleY;
fabric.filterBackend.applyFilters(
[filter], elementToFilter, sourceWidth, sourceHeight, this._element, cacheKey);
this._filterScalingX = canvasEl.width / this._originalElement.width;
this._filterScalingY = canvasEl.height / this._originalElement.height;
},
/**
* Applies filters assigned to this image (from "filters" array) or from filter param
* @method applyFilters
* @param {Array} filters to be applied
* @param {Boolean} forResizing specify if the filter operation is a resize operation
* @return {thisArg} return the fabric.Image object
* @chainable
*/
applyFilters: function(filters) {
filters = filters || this.filters || [];
filters = filters.filter(function(filter) { return filter && !filter.isNeutralState(); });
this.set('dirty', true);
// needs to clear out or WEBGL will not resize correctly
this.removeTexture(this.cacheKey + '_filtered');
if (filters.length === 0) {
this._element = this._originalElement;
this._filteredEl = null;
this._filterScalingX = 1;
this._filterScalingY = 1;
return this;
}
var imgElement = this._originalElement,
sourceWidth = imgElement.naturalWidth || imgElement.width,
sourceHeight = imgElement.naturalHeight || imgElement.height;
if (this._element === this._originalElement) {
// if the element is the same we need to create a new element
var canvasEl = fabric.util.createCanvasElement();
canvasEl.width = sourceWidth;
canvasEl.height = sourceHeight;
this._element = canvasEl;
this._filteredEl = canvasEl;
}
else {
// clear the existing element to get new filter data
// also dereference the eventual resized _element
this._element = this._filteredEl;
this._filteredEl.getContext('2d').clearRect(0, 0, sourceWidth, sourceHeight);
// we also need to resize again at next renderAll, so remove saved _lastScaleX/Y
this._lastScaleX = 1;
this._lastScaleY = 1;
}
if (!fabric.filterBackend) {
fabric.filterBackend = fabric.initFilterBackend();
}
fabric.filterBackend.applyFilters(
filters, this._originalElement, sourceWidth, sourceHeight, this._element, this.cacheKey);
if (this._originalElement.width !== this._element.width ||
this._originalElement.height !== this._element.height) {
this._filterScalingX = this._element.width / this._originalElement.width;
this._filterScalingY = this._element.height / this._originalElement.height;
}
return this;
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_render: function(ctx) {
if (this.isMoving !== true && this.resizeFilter && this._needsResize()) {
this.applyResizeFilters();
}
this._stroke(ctx);
this._renderPaintInOrder(ctx);
},
/**
* Decide if the object should cache or not. Create its own cache level
* needsItsOwnCache should be used when the object drawing method requires
* a cache step. None of the fabric classes requires it.
* Generally you do not cache objects in groups because the group outside is cached.
* This is the special image version where we would like to avoid caching where possible.
* Essentially images do not benefit from caching. They may require caching, and in that
* case we do it. Also caching an image usually ends in a loss of details.
* A full performance audit should be done.
* @return {Boolean}
*/
shouldCache: function() {
return this.needsItsOwnCache();
},
_renderFill: function(ctx) {
var elementToDraw = this._element,
w = this.width, h = this.height,
sW = Math.min(elementToDraw.naturalWidth || elementToDraw.width, w * this._filterScalingX),
sH = Math.min(elementToDraw.naturalHeight || elementToDraw.height, h * this._filterScalingY),
x = -w / 2, y = -h / 2,
sX = Math.max(0, this.cropX * this._filterScalingX),
sY = Math.max(0, this.cropY * this._filterScalingY);
elementToDraw && ctx.drawImage(elementToDraw, sX, sY, sW, sH, x, y, w, h);
},
/**
* @private, needed to check if image needs resize
*/
_needsResize: function() {
var scale = this.getTotalObjectScaling();
return (scale.scaleX !== this._lastScaleX || scale.scaleY !== this._lastScaleY);
},
/**
* @private
*/
_resetWidthHeight: function() {
this.set(this.getOriginalSize());
},
/**
* The Image class's initialization method. This method is automatically
* called by the constructor.
* @private
* @param {HTMLImageElement|String} element The element representing the image
* @param {Object} [options] Options object
*/
_initElement: function(element, options) {
this.setElement(fabric.util.getById(element), options);
fabric.util.addClass(this.getElement(), fabric.Image.CSS_CANVAS);
},
/**
* @private
* @param {Object} [options] Options object
*/
_initConfig: function(options) {
options || (options = { });
this.setOptions(options);
this._setWidthHeight(options);
if (this._element && this.crossOrigin) {
this._element.crossOrigin = this.crossOrigin;
}
},
/**
* @private
* @param {Array} filters to be initialized
* @param {Function} callback Callback to invoke when all fabric.Image.filters instances are created
*/
_initFilters: function(filters, callback) {
if (filters && filters.length) {
fabric.util.enlivenObjects(filters, function(enlivenedObjects) {
callback && callback(enlivenedObjects);
}, 'fabric.Image.filters');
}
else {
callback && callback();
}
},
/**
* @private
* Set the width and the height of the image object, using the element or the
* options.
* @param {Object} [options] Object with width/height properties
*/
_setWidthHeight: function(options) {
options || (options = { });
var el = this.getElement();
this.width = options.width || el.naturalWidth || el.width || 0;
this.height = options.height || el.naturalHeight || el.height || 0;
},
/**
* Calculate offset for center and scale factor for the image in order to respect
* the preserveAspectRatio attribute
* @private
* @return {Object}
*/
parsePreserveAspectRatioAttribute: function() {
var pAR = fabric.util.parsePreserveAspectRatioAttribute(this.preserveAspectRatio || ''),
rWidth = this._element.width, rHeight = this._element.height,
scaleX = 1, scaleY = 1, offsetLeft = 0, offsetTop = 0, cropX = 0, cropY = 0,
offset, pWidth = this.width, pHeight = this.height, parsedAttributes = { width: pWidth, height: pHeight };
if (pAR && (pAR.alignX !== 'none' || pAR.alignY !== 'none')) {
if (pAR.meetOrSlice === 'meet') {
scaleX = scaleY = fabric.util.findScaleToFit(this._element, parsedAttributes);
offset = (pWidth - rWidth * scaleX) / 2;
if (pAR.alignX === 'Min') {
offsetLeft = -offset;
}
if (pAR.alignX === 'Max') {
offsetLeft = offset;
}
offset = (pHeight - rHeight * scaleY) / 2;
if (pAR.alignY === 'Min') {
offsetTop = -offset;
}
if (pAR.alignY === 'Max') {
offsetTop = offset;
}
}
if (pAR.meetOrSlice === 'slice') {
scaleX = scaleY = fabric.util.findScaleToCover(this._element, parsedAttributes);
offset = rWidth - pWidth / scaleX;
if (pAR.alignX === 'Mid') {
cropX = offset / 2;
}
if (pAR.alignX === 'Max') {
cropX = offset;
}
offset = rHeight - pHeight / scaleY;
if (pAR.alignY === 'Mid') {
cropY = offset / 2;
}
if (pAR.alignY === 'Max') {
cropY = offset;
}
rWidth = pWidth / scaleX;
rHeight = pHeight / scaleY;
}
}
else {
scaleX = pWidth / rWidth;
scaleY = pHeight / rHeight;
}
return {
width: rWidth,
height: rHeight,
scaleX: scaleX,
scaleY: scaleY,
offsetLeft: offsetLeft,
offsetTop: offsetTop,
cropX: cropX,
cropY: cropY
};
}
});
/**
* Default CSS class name for canvas
* @static
* @type String
* @default
*/
fabric.Image.CSS_CANVAS = 'canvas-img';
/**
* Alias for getSrc
* @static
*/
fabric.Image.prototype.getSvgSrc = fabric.Image.prototype.getSrc;
/**
* Creates an instance of fabric.Image from its object representation
* @static
* @param {Object} object Object to create an instance from
* @param {Function} callback Callback to invoke when an image instance is created
*/
fabric.Image.fromObject = function(_object, callback) {
var object = fabric.util.object.clone(_object);
fabric.util.loadImage(object.src, function(img, error) {
if (error) {
callback && callback(null, error);
return;
}
fabric.Image.prototype._initFilters.call(object, object.filters, function(filters) {
object.filters = filters || [];
fabric.Image.prototype._initFilters.call(object, [object.resizeFilter], function(resizeFilters) {
object.resizeFilter = resizeFilters[0];
fabric.util.enlivenObjects([object.clipPath], function(enlivedProps) {
object.clipPath = enlivedProps[0];
var image = new fabric.Image(img, object);
callback(image);
});
});
});
}, null, object.crossOrigin);
};
/**
* Creates an instance of fabric.Image from an URL string
* @static
* @param {String} url URL to create an image from
* @param {Function} [callback] Callback to invoke when image is created (newly created image is passed as a first argument)
* @param {Object} [imgOptions] Options object
*/
fabric.Image.fromURL = function(url, callback, imgOptions) {
fabric.util.loadImage(url, function(img) {
callback && callback(new fabric.Image(img, imgOptions));
}, null, imgOptions && imgOptions.crossOrigin);
};
/* _FROM_SVG_START_ */
/**
* List of attribute names to account for when parsing SVG element (used by {@link fabric.Image.fromElement})
* @static
* @see {@link http://www.w3.org/TR/SVG/struct.html#ImageElement}
*/
fabric.Image.ATTRIBUTE_NAMES =
fabric.SHARED_ATTRIBUTES.concat('x y width height preserveAspectRatio xlink:href crossOrigin'.split(' '));
/**
* Returns {@link fabric.Image} instance from an SVG element
* @static
* @param {SVGElement} element Element to parse
* @param {Object} [options] Options object
* @param {Function} callback Callback to execute when fabric.Image object is created
* @return {fabric.Image} Instance of fabric.Image
*/
fabric.Image.fromElement = function(element, callback, options) {
var parsedAttributes = fabric.parseAttributes(element, fabric.Image.ATTRIBUTE_NAMES);
fabric.Image.fromURL(parsedAttributes['xlink:href'], callback,
extend((options ? fabric.util.object.clone(options) : { }), parsedAttributes));
};
/* _FROM_SVG_END_ */
})(typeof exports !== 'undefined' ? exports : this);
fabric.util.object.extend(fabric.Object.prototype, /** @lends fabric.Object.prototype */ {
/**
* @private
* @return {Number} angle value
*/
_getAngleValueForStraighten: function() {
var angle = this.angle % 360;
if (angle > 0) {
return Math.round((angle - 1) / 90) * 90;
}
return Math.round(angle / 90) * 90;
},
/**
* Straightens an object (rotating it from current angle to one of 0, 90, 180, 270, etc. depending on which is closer)
* @return {fabric.Object} thisArg
* @chainable
*/
straighten: function() {
this.rotate(this._getAngleValueForStraighten());
return this;
},
/**
* Same as {@link fabric.Object.prototype.straighten} but with animation
* @param {Object} callbacks Object with callback functions
* @param {Function} [callbacks.onComplete] Invoked on completion
* @param {Function} [callbacks.onChange] Invoked on every step of animation
* @return {fabric.Object} thisArg
* @chainable
*/
fxStraighten: function(callbacks) {
callbacks = callbacks || { };
var empty = function() { },
onComplete = callbacks.onComplete || empty,
onChange = callbacks.onChange || empty,
_this = this;
fabric.util.animate({
startValue: this.get('angle'),
endValue: this._getAngleValueForStraighten(),
duration: this.FX_DURATION,
onChange: function(value) {
_this.rotate(value);
onChange();
},
onComplete: function() {
_this.setCoords();
onComplete();
},
});
return this;
}
});
fabric.util.object.extend(fabric.StaticCanvas.prototype, /** @lends fabric.StaticCanvas.prototype */ {
/**
* Straightens object, then rerenders canvas
* @param {fabric.Object} object Object to straighten
* @return {fabric.Canvas} thisArg
* @chainable
*/
straightenObject: function (object) {
object.straighten();
this.requestRenderAll();
return this;
},
/**
* Same as {@link fabric.Canvas.prototype.straightenObject}, but animated
* @param {fabric.Object} object Object to straighten
* @return {fabric.Canvas} thisArg
* @chainable
*/
fxStraightenObject: function (object) {
object.fxStraighten({
onChange: this.requestRenderAllBound
});
return this;
}
});
(function() {
'use strict';
/**
* Tests if webgl supports certain precision
* @param {WebGL} Canvas WebGL context to test on
* @param {String} Precision to test can be any of following: 'lowp', 'mediump', 'highp'
* @returns {Boolean} Whether the user's browser WebGL supports given precision.
*/
function testPrecision(gl, precision){
var fragmentSource = 'precision ' + precision + ' float;\nvoid main(){}';
var fragmentShader = gl.createShader(gl.FRAGMENT_SHADER);
gl.shaderSource(fragmentShader, fragmentSource);
gl.compileShader(fragmentShader);
if (!gl.getShaderParameter(fragmentShader, gl.COMPILE_STATUS)) {
return false;
}
return true;
}
/**
* Indicate whether this filtering backend is supported by the user's browser.
* @param {Number} tileSize check if the tileSize is supported
* @returns {Boolean} Whether the user's browser supports WebGL.
*/
fabric.isWebglSupported = function(tileSize) {
if (fabric.isLikelyNode) {
return false;
}
tileSize = tileSize || fabric.WebglFilterBackend.prototype.tileSize;
var canvas = document.createElement('canvas');
var gl = canvas.getContext('webgl') || canvas.getContext('experimental-webgl');
var isSupported = false;
// eslint-disable-next-line
if (gl) {
fabric.maxTextureSize = gl.getParameter(gl.MAX_TEXTURE_SIZE);
isSupported = fabric.maxTextureSize >= tileSize;
var precisions = ['highp', 'mediump', 'lowp'];
for (var i = 0; i < 3; i++){
if (testPrecision(gl, precisions[i])){
fabric.webGlPrecision = precisions[i];
break;
};
}
}
this.isSupported = isSupported;
return isSupported;
};
fabric.WebglFilterBackend = WebglFilterBackend;
/**
* WebGL filter backend.
*/
function WebglFilterBackend(options) {
if (options && options.tileSize) {
this.tileSize = options.tileSize;
}
this.setupGLContext(this.tileSize, this.tileSize);
this.captureGPUInfo();
};
WebglFilterBackend.prototype = /** @lends fabric.WebglFilterBackend.prototype */ {
tileSize: 2048,
/**
* Experimental. This object is a sort of repository of help layers used to avoid
* of recreating them during frequent filtering. If you are previewing a filter with
* a slider you problably do not want to create help layers every filter step.
* in this object there will be appended some canvases, created once, resized sometimes
* cleared never. Clearing is left to the developer.
**/
resources: {
},
/**
* Setup a WebGL context suitable for filtering, and bind any needed event handlers.
*/
setupGLContext: function(width, height) {
this.dispose();
this.createWebGLCanvas(width, height);
// eslint-disable-next-line
this.aPosition = new Float32Array([0, 0, 0, 1, 1, 0, 1, 1]);
this.chooseFastestCopyGLTo2DMethod(width, height);
},
/**
* Pick a method to copy data from GL context to 2d canvas. In some browsers using
* putImageData is faster than drawImage for that specific operation.
*/
chooseFastestCopyGLTo2DMethod: function(width, height) {
var canMeasurePerf = typeof window.performance !== 'undefined', canUseImageData;
try {
new ImageData(1, 1);
canUseImageData = true;
}
catch (e) {
canUseImageData = false;
}
// eslint-disable-next-line no-undef
var canUseArrayBuffer = typeof ArrayBuffer !== 'undefined';
// eslint-disable-next-line no-undef
var canUseUint8Clamped = typeof Uint8ClampedArray !== 'undefined';
if (!(canMeasurePerf && canUseImageData && canUseArrayBuffer && canUseUint8Clamped)) {
return;
}
var targetCanvas = fabric.util.createCanvasElement();
// eslint-disable-next-line no-undef
var imageBuffer = new ArrayBuffer(width * height * 4);
if (fabric.forceGLPutImageData) {
this.imageBuffer = imageBuffer;
this.copyGLTo2D = copyGLTo2DPutImageData;
return;
}
var testContext = {
imageBuffer: imageBuffer,
destinationWidth: width,
destinationHeight: height,
targetCanvas: targetCanvas
};
var startTime, drawImageTime, putImageDataTime;
targetCanvas.width = width;
targetCanvas.height = height;
startTime = window.performance.now();
copyGLTo2DDrawImage.call(testContext, this.gl, testContext);
drawImageTime = window.performance.now() - startTime;
startTime = window.performance.now();
copyGLTo2DPutImageData.call(testContext, this.gl, testContext);
putImageDataTime = window.performance.now() - startTime;
if (drawImageTime > putImageDataTime) {
this.imageBuffer = imageBuffer;
this.copyGLTo2D = copyGLTo2DPutImageData;
}
else {
this.copyGLTo2D = copyGLTo2DDrawImage;
}
},
/**
* Create a canvas element and associated WebGL context and attaches them as
* class properties to the GLFilterBackend class.
*/
createWebGLCanvas: function(width, height) {
var canvas = fabric.util.createCanvasElement();
canvas.width = width;
canvas.height = height;
var glOptions = {
alpha: true,
premultipliedAlpha: false,
depth: false,
stencil: false,
antialias: false
},
gl = canvas.getContext('webgl', glOptions);
if (!gl) {
gl = canvas.getContext('experimental-webgl', glOptions);
}
if (!gl) {
return;
}
gl.clearColor(0, 0, 0, 0);
// this canvas can fire webglcontextlost and webglcontextrestored
this.canvas = canvas;
this.gl = gl;
},
/**
* Attempts to apply the requested filters to the source provided, drawing the filtered output
* to the provided target canvas.
*
* @param {Array} filters The filters to apply.
* @param {HTMLImageElement|HTMLCanvasElement} source The source to be filtered.
* @param {Number} width The width of the source input.
* @param {Number} height The height of the source input.
* @param {HTMLCanvasElement} targetCanvas The destination for filtered output to be drawn.
* @param {String|undefined} cacheKey A key used to cache resources related to the source. If
* omitted, caching will be skipped.
*/
applyFilters: function(filters, source, width, height, targetCanvas, cacheKey) {
var gl = this.gl;
var cachedTexture;
if (cacheKey) {
cachedTexture = this.getCachedTexture(cacheKey, source);
}
var pipelineState = {
originalWidth: source.width || source.originalWidth,
originalHeight: source.height || source.originalHeight,
sourceWidth: width,
sourceHeight: height,
destinationWidth: width,
destinationHeight: height,
context: gl,
sourceTexture: this.createTexture(gl, width, height, !cachedTexture && source),
targetTexture: this.createTexture(gl, width, height),
originalTexture: cachedTexture ||
this.createTexture(gl, width, height, !cachedTexture && source),
passes: filters.length,
webgl: true,
aPosition: this.aPosition,
programCache: this.programCache,
pass: 0,
filterBackend: this,
targetCanvas: targetCanvas
};
var tempFbo = gl.createFramebuffer();
gl.bindFramebuffer(gl.FRAMEBUFFER, tempFbo);
filters.forEach(function(filter) { filter && filter.applyTo(pipelineState); });
resizeCanvasIfNeeded(pipelineState);
this.copyGLTo2D(gl, pipelineState);
gl.bindTexture(gl.TEXTURE_2D, null);
gl.deleteTexture(pipelineState.sourceTexture);
gl.deleteTexture(pipelineState.targetTexture);
gl.deleteFramebuffer(tempFbo);
targetCanvas.getContext('2d').setTransform(1, 0, 0, 1, 0, 0);
return pipelineState;
},
/**
* Detach event listeners, remove references, and clean up caches.
*/
dispose: function() {
if (this.canvas) {
this.canvas = null;
this.gl = null;
}
this.clearWebGLCaches();
},
/**
* Wipe out WebGL-related caches.
*/
clearWebGLCaches: function() {
this.programCache = {};
this.textureCache = {};
},
/**
* Create a WebGL texture object.
*
* Accepts specific dimensions to initialize the textuer to or a source image.
*
* @param {WebGLRenderingContext} gl The GL context to use for creating the texture.
* @param {Number} width The width to initialize the texture at.
* @param {Number} height The height to initialize the texture.
* @param {HTMLImageElement|HTMLCanvasElement} textureImageSource A source for the texture data.
* @returns {WebGLTexture}
*/
createTexture: function(gl, width, height, textureImageSource) {
var texture = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, texture);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
if (textureImageSource) {
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, textureImageSource);
}
else {
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, width, height, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);
}
return texture;
},
/**
* Can be optionally used to get a texture from the cache array
*
* If an existing texture is not found, a new texture is created and cached.
*
* @param {String} uniqueId A cache key to use to find an existing texture.
* @param {HTMLImageElement|HTMLCanvasElement} textureImageSource A source to use to create the
* texture cache entry if one does not already exist.
*/
getCachedTexture: function(uniqueId, textureImageSource) {
if (this.textureCache[uniqueId]) {
return this.textureCache[uniqueId];
}
else {
var texture = this.createTexture(
this.gl, textureImageSource.width, textureImageSource.height, textureImageSource);
this.textureCache[uniqueId] = texture;
return texture;
}
},
/**
* Clear out cached resources related to a source image that has been
* filtered previously.
*
* @param {String} cacheKey The cache key provided when the source image was filtered.
*/
evictCachesForKey: function(cacheKey) {
if (this.textureCache[cacheKey]) {
this.gl.deleteTexture(this.textureCache[cacheKey]);
delete this.textureCache[cacheKey];
}
},
copyGLTo2D: copyGLTo2DDrawImage,
/**
* Attempt to extract GPU information strings from a WebGL context.
*
* Useful information when debugging or blacklisting specific GPUs.
*
* @returns {Object} A GPU info object with renderer and vendor strings.
*/
captureGPUInfo: function() {
if (this.gpuInfo) {
return this.gpuInfo;
}
var gl = this.gl, gpuInfo = { renderer: '', vendor: '' };
if (!gl) {
return gpuInfo;
}
var ext = gl.getExtension('WEBGL_debug_renderer_info');
if (ext) {
var renderer = gl.getParameter(ext.UNMASKED_RENDERER_WEBGL);
var vendor = gl.getParameter(ext.UNMASKED_VENDOR_WEBGL);
if (renderer) {
gpuInfo.renderer = renderer.toLowerCase();
}
if (vendor) {
gpuInfo.vendor = vendor.toLowerCase();
}
}
this.gpuInfo = gpuInfo;
return gpuInfo;
},
};
})();
function resizeCanvasIfNeeded(pipelineState) {
var targetCanvas = pipelineState.targetCanvas,
width = targetCanvas.width, height = targetCanvas.height,
dWidth = pipelineState.destinationWidth,
dHeight = pipelineState.destinationHeight;
if (width !== dWidth || height !== dHeight) {
targetCanvas.width = dWidth;
targetCanvas.height = dHeight;
}
}
/**
* Copy an input WebGL canvas on to an output 2D canvas.
*
* The WebGL canvas is assumed to be upside down, with the top-left pixel of the
* desired output image appearing in the bottom-left corner of the WebGL canvas.
*
* @param {WebGLRenderingContext} sourceContext The WebGL context to copy from.
* @param {HTMLCanvasElement} targetCanvas The 2D target canvas to copy on to.
* @param {Object} pipelineState The 2D target canvas to copy on to.
*/
function copyGLTo2DDrawImage(gl, pipelineState) {
var glCanvas = gl.canvas, targetCanvas = pipelineState.targetCanvas,
ctx = targetCanvas.getContext('2d');
ctx.translate(0, targetCanvas.height); // move it down again
ctx.scale(1, -1); // vertical flip
// where is my image on the big glcanvas?
var sourceY = glCanvas.height - targetCanvas.height;
ctx.drawImage(glCanvas, 0, sourceY, targetCanvas.width, targetCanvas.height, 0, 0,
targetCanvas.width, targetCanvas.height);
}
/**
* Copy an input WebGL canvas on to an output 2D canvas using 2d canvas' putImageData
* API. Measurably faster than using ctx.drawImage in Firefox (version 54 on OSX Sierra).
*
* @param {WebGLRenderingContext} sourceContext The WebGL context to copy from.
* @param {HTMLCanvasElement} targetCanvas The 2D target canvas to copy on to.
* @param {Object} pipelineState The 2D target canvas to copy on to.
*/
function copyGLTo2DPutImageData(gl, pipelineState) {
var targetCanvas = pipelineState.targetCanvas, ctx = targetCanvas.getContext('2d'),
dWidth = pipelineState.destinationWidth,
dHeight = pipelineState.destinationHeight,
numBytes = dWidth * dHeight * 4;
// eslint-disable-next-line no-undef
var u8 = new Uint8Array(this.imageBuffer, 0, numBytes);
// eslint-disable-next-line no-undef
var u8Clamped = new Uint8ClampedArray(this.imageBuffer, 0, numBytes);
gl.readPixels(0, 0, dWidth, dHeight, gl.RGBA, gl.UNSIGNED_BYTE, u8);
var imgData = new ImageData(u8Clamped, dWidth, dHeight);
ctx.putImageData(imgData, 0, 0);
}
(function() {
'use strict';
var noop = function() {};
fabric.Canvas2dFilterBackend = Canvas2dFilterBackend;
/**
* Canvas 2D filter backend.
*/
function Canvas2dFilterBackend() {};
Canvas2dFilterBackend.prototype = /** @lends fabric.Canvas2dFilterBackend.prototype */ {
evictCachesForKey: noop,
dispose: noop,
clearWebGLCaches: noop,
/**
* Experimental. This object is a sort of repository of help layers used to avoid
* of recreating them during frequent filtering. If you are previewing a filter with
* a slider you probably do not want to create help layers every filter step.
* in this object there will be appended some canvases, created once, resized sometimes
* cleared never. Clearing is left to the developer.
**/
resources: {
},
/**
* Apply a set of filters against a source image and draw the filtered output
* to the provided destination canvas.
*
* @param {EnhancedFilter} filters The filter to apply.
* @param {HTMLImageElement|HTMLCanvasElement} sourceElement The source to be filtered.
* @param {Number} sourceWidth The width of the source input.
* @param {Number} sourceHeight The height of the source input.
* @param {HTMLCanvasElement} targetCanvas The destination for filtered output to be drawn.
*/
applyFilters: function(filters, sourceElement, sourceWidth, sourceHeight, targetCanvas) {
var ctx = targetCanvas.getContext('2d');
ctx.drawImage(sourceElement, 0, 0, sourceWidth, sourceHeight);
var imageData = ctx.getImageData(0, 0, sourceWidth, sourceHeight);
var originalImageData = ctx.getImageData(0, 0, sourceWidth, sourceHeight);
var pipelineState = {
sourceWidth: sourceWidth,
sourceHeight: sourceHeight,
imageData: imageData,
originalEl: sourceElement,
originalImageData: originalImageData,
canvasEl: targetCanvas,
ctx: ctx,
filterBackend: this,
};
filters.forEach(function(filter) { filter.applyTo(pipelineState); });
if (pipelineState.imageData.width !== sourceWidth || pipelineState.imageData.height !== sourceHeight) {
targetCanvas.width = pipelineState.imageData.width;
targetCanvas.height = pipelineState.imageData.height;
}
ctx.putImageData(pipelineState.imageData, 0, 0);
return pipelineState;
},
};
})();
/**
* @namespace fabric.Image.filters
* @memberOf fabric.Image
* @tutorial {@link http://fabricjs.com/fabric-intro-part-2#image_filters}
* @see {@link http://fabricjs.com/image-filters|ImageFilters demo}
*/
fabric.Image = fabric.Image || { };
fabric.Image.filters = fabric.Image.filters || { };
/**
* Root filter class from which all filter classes inherit from
* @class fabric.Image.filters.BaseFilter
* @memberOf fabric.Image.filters
*/
fabric.Image.filters.BaseFilter = fabric.util.createClass(/** @lends fabric.Image.filters.BaseFilter.prototype */ {
/**
* Filter type
* @param {String} type
* @default
*/
type: 'BaseFilter',
/**
* Array of attributes to send with buffers. do not modify
* @private
*/
vertexSource: 'attribute vec2 aPosition;\n' +
'varying vec2 vTexCoord;\n' +
'void main() {\n' +
'vTexCoord = aPosition;\n' +
'gl_Position = vec4(aPosition * 2.0 - 1.0, 0.0, 1.0);\n' +
'}',
fragmentSource: 'precision highp float;\n' +
'varying vec2 vTexCoord;\n' +
'uniform sampler2D uTexture;\n' +
'void main() {\n' +
'gl_FragColor = texture2D(uTexture, vTexCoord);\n' +
'}',
/**
* Constructor
* @param {Object} [options] Options object
*/
initialize: function(options) {
if (options) {
this.setOptions(options);
}
},
/**
* Sets filter's properties from options
* @param {Object} [options] Options object
*/
setOptions: function(options) {
for (var prop in options) {
this[prop] = options[prop];
}
},
/**
* Compile this filter's shader program.
*
* @param {WebGLRenderingContext} gl The GL canvas context to use for shader compilation.
* @param {String} fragmentSource fragmentShader source for compilation
* @param {String} vertexSource vertexShader source for compilation
*/
createProgram: function(gl, fragmentSource, vertexSource) {
fragmentSource = fragmentSource || this.fragmentSource;
vertexSource = vertexSource || this.vertexSource;
if (fabric.webGlPrecision !== 'highp'){
fragmentSource = fragmentSource.replace(
/precision highp float/g,
'precision ' + fabric.webGlPrecision + ' float'
);
}
var vertexShader = gl.createShader(gl.VERTEX_SHADER);
gl.shaderSource(vertexShader, vertexSource);
gl.compileShader(vertexShader);
if (!gl.getShaderParameter(vertexShader, gl.COMPILE_STATUS)) {
throw new Error(
// eslint-disable-next-line prefer-template
'Vertex shader compile error for ' + this.type + ': ' +
gl.getShaderInfoLog(vertexShader)
);
}
var fragmentShader = gl.createShader(gl.FRAGMENT_SHADER);
gl.shaderSource(fragmentShader, fragmentSource);
gl.compileShader(fragmentShader);
if (!gl.getShaderParameter(fragmentShader, gl.COMPILE_STATUS)) {
throw new Error(
// eslint-disable-next-line prefer-template
'Fragment shader compile error for ' + this.type + ': ' +
gl.getShaderInfoLog(fragmentShader)
);
}
var program = gl.createProgram();
gl.attachShader(program, vertexShader);
gl.attachShader(program, fragmentShader);
gl.linkProgram(program);
if (!gl.getProgramParameter(program, gl.LINK_STATUS)) {
throw new Error(
// eslint-disable-next-line prefer-template
'Shader link error for "${this.type}" ' +
gl.getProgramInfoLog(program)
);
}
var attributeLocations = this.getAttributeLocations(gl, program);
var uniformLocations = this.getUniformLocations(gl, program) || { };
uniformLocations.uStepW = gl.getUniformLocation(program, 'uStepW');
uniformLocations.uStepH = gl.getUniformLocation(program, 'uStepH');
return {
program: program,
attributeLocations: attributeLocations,
uniformLocations: uniformLocations
};
},
/**
* Return a map of attribute names to WebGLAttributeLocation objects.
*
* @param {WebGLRenderingContext} gl The canvas context used to compile the shader program.
* @param {WebGLShaderProgram} program The shader program from which to take attribute locations.
* @returns {Object} A map of attribute names to attribute locations.
*/
getAttributeLocations: function(gl, program) {
return {
aPosition: gl.getAttribLocation(program, 'aPosition'),
};
},
/**
* Return a map of uniform names to WebGLUniformLocation objects.
*
* Intended to be overridden by subclasses.
*
* @param {WebGLRenderingContext} gl The canvas context used to compile the shader program.
* @param {WebGLShaderProgram} program The shader program from which to take uniform locations.
* @returns {Object} A map of uniform names to uniform locations.
*/
getUniformLocations: function (/* gl, program */) {
// in case i do not need any special uniform i need to return an empty object
return { };
},
/**
* Send attribute data from this filter to its shader program on the GPU.
*
* @param {WebGLRenderingContext} gl The canvas context used to compile the shader program.
* @param {Object} attributeLocations A map of shader attribute names to their locations.
*/
sendAttributeData: function(gl, attributeLocations, aPositionData) {
var attributeLocation = attributeLocations.aPosition;
var buffer = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, buffer);
gl.enableVertexAttribArray(attributeLocation);
gl.vertexAttribPointer(attributeLocation, 2, gl.FLOAT, false, 0, 0);
gl.bufferData(gl.ARRAY_BUFFER, aPositionData, gl.STATIC_DRAW);
},
_setupFrameBuffer: function(options) {
var gl = options.context, width, height;
if (options.passes > 1) {
width = options.destinationWidth;
height = options.destinationHeight;
if (options.sourceWidth !== width || options.sourceHeight !== height) {
gl.deleteTexture(options.targetTexture);
options.targetTexture = options.filterBackend.createTexture(gl, width, height);
}
gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D,
options.targetTexture, 0);
}
else {
// draw last filter on canvas and not to framebuffer.
gl.bindFramebuffer(gl.FRAMEBUFFER, null);
gl.finish();
}
},
_swapTextures: function(options) {
options.passes--;
options.pass++;
var temp = options.targetTexture;
options.targetTexture = options.sourceTexture;
options.sourceTexture = temp;
},
/**
* Generic isNeutral implementation for one parameter based filters.
* Used only in image applyFilters to discard filters that will not have an effect
* on the image
* Other filters may need their own verison ( ColorMatrix, HueRotation, gamma, ComposedFilter )
* @param {Object} options
**/
isNeutralState: function(/* options */) {
var main = this.mainParameter,
_class = fabric.Image.filters[this.type].prototype;
if (main) {
if (Array.isArray(_class[main])) {
for (var i = _class[main].length; i--;) {
if (this[main][i] !== _class[main][i]) {
return false;
}
}
return true;
}
else {
return _class[main] === this[main];
}
}
else {
return false;
}
},
/**
* Apply this filter to the input image data provided.
*
* Determines whether to use WebGL or Canvas2D based on the options.webgl flag.
*
* @param {Object} options
* @param {Number} options.passes The number of filters remaining to be executed
* @param {Boolean} options.webgl Whether to use webgl to render the filter.
* @param {WebGLTexture} options.sourceTexture The texture setup as the source to be filtered.
* @param {WebGLTexture} options.targetTexture The texture where filtered output should be drawn.
* @param {WebGLRenderingContext} options.context The GL context used for rendering.
* @param {Object} options.programCache A map of compiled shader programs, keyed by filter type.
*/
applyTo: function(options) {
if (options.webgl) {
this._setupFrameBuffer(options);
this.applyToWebGL(options);
this._swapTextures(options);
}
else {
this.applyTo2d(options);
}
},
/**
* Retrieves the cached shader.
* @param {Object} options
* @param {WebGLRenderingContext} options.context The GL context used for rendering.
* @param {Object} options.programCache A map of compiled shader programs, keyed by filter type.
*/
retrieveShader: function(options) {
if (!options.programCache.hasOwnProperty(this.type)) {
options.programCache[this.type] = this.createProgram(options.context);
}
return options.programCache[this.type];
},
/**
* Apply this filter using webgl.
*
* @param {Object} options
* @param {Number} options.passes The number of filters remaining to be executed
* @param {Boolean} options.webgl Whether to use webgl to render the filter.
* @param {WebGLTexture} options.originalTexture The texture of the original input image.
* @param {WebGLTexture} options.sourceTexture The texture setup as the source to be filtered.
* @param {WebGLTexture} options.targetTexture The texture where filtered output should be drawn.
* @param {WebGLRenderingContext} options.context The GL context used for rendering.
* @param {Object} options.programCache A map of compiled shader programs, keyed by filter type.
*/
applyToWebGL: function(options) {
var gl = options.context;
var shader = this.retrieveShader(options);
if (options.pass === 0 && options.originalTexture) {
gl.bindTexture(gl.TEXTURE_2D, options.originalTexture);
}
else {
gl.bindTexture(gl.TEXTURE_2D, options.sourceTexture);
}
gl.useProgram(shader.program);
this.sendAttributeData(gl, shader.attributeLocations, options.aPosition);
gl.uniform1f(shader.uniformLocations.uStepW, 1 / options.sourceWidth);
gl.uniform1f(shader.uniformLocations.uStepH, 1 / options.sourceHeight);
this.sendUniformData(gl, shader.uniformLocations);
gl.viewport(0, 0, options.destinationWidth, options.destinationHeight);
gl.drawArrays(gl.TRIANGLE_STRIP, 0, 4);
},
bindAdditionalTexture: function(gl, texture, textureUnit) {
gl.activeTexture(textureUnit);
gl.bindTexture(gl.TEXTURE_2D, texture);
// reset active texture to 0 as usual
gl.activeTexture(gl.TEXTURE0);
},
unbindAdditionalTexture: function(gl, textureUnit) {
gl.activeTexture(textureUnit);
gl.bindTexture(gl.TEXTURE_2D, null);
gl.activeTexture(gl.TEXTURE0);
},
getMainParameter: function() {
return this[this.mainParameter];
},
setMainParameter: function(value) {
this[this.mainParameter] = value;
},
/**
* Send uniform data from this filter to its shader program on the GPU.
*
* Intended to be overridden by subclasses.
*
* @param {WebGLRenderingContext} gl The canvas context used to compile the shader program.
* @param {Object} uniformLocations A map of shader uniform names to their locations.
*/
sendUniformData: function(/* gl, uniformLocations */) {
// Intentionally left blank. Override me in subclasses.
},
/**
* If needed by a 2d filter, this functions can create an helper canvas to be used
* remember that options.targetCanvas is available for use till end of chain.
*/
createHelpLayer: function(options) {
if (!options.helpLayer) {
var helpLayer = document.createElement('canvas');
helpLayer.width = options.sourceWidth;
helpLayer.height = options.sourceHeight;
options.helpLayer = helpLayer;
}
},
/**
* Returns object representation of an instance
* @return {Object} Object representation of an instance
*/
toObject: function() {
var object = { type: this.type }, mainP = this.mainParameter;
if (mainP) {
object[mainP] = this[mainP];
}
return object;
},
/**
* Returns a JSON representation of an instance
* @return {Object} JSON
*/
toJSON: function() {
// delegate, not alias
return this.toObject();
}
});
fabric.Image.filters.BaseFilter.fromObject = function(object, callback) {
var filter = new fabric.Image.filters[object.type](object);
callback && callback(filter);
return filter;
};
(function(global) {
'use strict';
var fabric = global.fabric || (global.fabric = { }),
filters = fabric.Image.filters,
createClass = fabric.util.createClass;
/**
* Color Matrix filter class
* @class fabric.Image.filters.ColorMatrix
* @memberOf fabric.Image.filters
* @extends fabric.Image.filters.BaseFilter
* @see {@link fabric.Image.filters.ColorMatrix#initialize} for constructor definition
* @see {@link http://fabricjs.com/image-filters|ImageFilters demo}
* @see {@Link http://www.webwasp.co.uk/tutorials/219/Color_Matrix_Filter.php}
* @see {@Link http://phoboslab.org/log/2013/11/fast-image-filters-with-webgl}
* @example <caption>Kodachrome filter</caption>
* var filter = new fabric.Image.filters.ColorMatrix({
* matrix: [
1.1285582396593525, -0.3967382283601348, -0.03992559172921793, 0, 63.72958762196502,
-0.16404339962244616, 1.0835251566291304, -0.05498805115633132, 0, 24.732407896706203,
-0.16786010706155763, -0.5603416277695248, 1.6014850761964943, 0, 35.62982807460946,
0, 0, 0, 1, 0
]
* });
* object.filters.push(filter);
* object.applyFilters();
*/
filters.ColorMatrix = createClass(filters.BaseFilter, /** @lends fabric.Image.filters.ColorMatrix.prototype */ {
/**
* Filter type
* @param {String} type
* @default
*/
type: 'ColorMatrix',
fragmentSource: 'precision highp float;\n' +
'uniform sampler2D uTexture;\n' +
'varying vec2 vTexCoord;\n' +
'uniform mat4 uColorMatrix;\n' +
'uniform vec4 uConstants;\n' +
'void main() {\n' +
'vec4 color = texture2D(uTexture, vTexCoord);\n' +
'color *= uColorMatrix;\n' +
'color += uConstants;\n' +
'gl_FragColor = color;\n' +
'}',
/**
* Colormatrix for pixels.
* array of 20 floats. Numbers in positions 4, 9, 14, 19 loose meaning
* outside the -1, 1 range.
* 0.0039215686 is the part of 1 that get translated to 1 in 2d
* @param {Array} matrix array of 20 numbers.
* @default
*/
matrix: [
1, 0, 0, 0, 0,
0, 1, 0, 0, 0,
0, 0, 1, 0, 0,
0, 0, 0, 1, 0
],
mainParameter: 'matrix',
/**
* Lock the colormatrix on the color part, skipping alpha, manly for non webgl scenario
* to save some calculation
*/
colorsOnly: true,
/**
* Constructor
* @param {Object} [options] Options object
*/
initialize: function(options) {
this.callSuper('initialize', options);
// create a new array instead mutating the prototype with push
this.matrix = this.matrix.slice(0);
},
/**
* Apply the ColorMatrix operation to a Uint8Array representing the pixels of an image.
*
* @param {Object} options
* @param {ImageData} options.imageData The Uint8Array to be filtered.
*/
applyTo2d: function(options) {
var imageData = options.imageData,
data = imageData.data,
iLen = data.length,
m = this.matrix,
r, g, b, a, i, colorsOnly = this.colorsOnly;
for (i = 0; i < iLen; i += 4) {
r = data[i];
g = data[i + 1];
b = data[i + 2];
if (colorsOnly) {
data[i] = r * m[0] + g * m[1] + b * m[2] + m[4] * 255;
data[i + 1] = r * m[5] + g * m[6] + b * m[7] + m[9] * 255;
data[i + 2] = r * m[10] + g * m[11] + b * m[12] + m[14] * 255;
}
else {
a = data[i + 3];
data[i] = r * m[0] + g * m[1] + b * m[2] + a * m[3] + m[4] * 255;
data[i + 1] = r * m[5] + g * m[6] + b * m[7] + a * m[8] + m[9] * 255;
data[i + 2] = r * m[10] + g * m[11] + b * m[12] + a * m[13] + m[14] * 255;
data[i + 3] = r * m[15] + g * m[16] + b * m[17] + a * m[18] + m[19] * 255;
}
}
},
/**
* Return WebGL uniform locations for this filter's shader.
*
* @param {WebGLRenderingContext} gl The GL canvas context used to compile this filter's shader.
* @param {WebGLShaderProgram} program This filter's compiled shader program.
*/
getUniformLocations: function(gl, program) {
return {
uColorMatrix: gl.getUniformLocation(program, 'uColorMatrix'),
uConstants: gl.getUniformLocation(program, 'uConstants'),
};
},
/**
* Send data from this filter to its shader program's uniforms.
*
* @param {WebGLRenderingContext} gl The GL canvas context used to compile this filter's shader.
* @param {Object} uniformLocations A map of string uniform names to WebGLUniformLocation objects
*/
sendUniformData: function(gl, uniformLocations) {
var m = this.matrix,
matrix = [
m[0], m[1], m[2], m[3],
m[5], m[6], m[7], m[8],
m[10], m[11], m[12], m[13],
m[15], m[16], m[17], m[18]
],
constants = [m[4], m[9], m[14], m[19]];
gl.uniformMatrix4fv(uniformLocations.uColorMatrix, false, matrix);
gl.uniform4fv(uniformLocations.uConstants, constants);
},
});
/**
* Returns filter instance from an object representation
* @static
* @param {Object} object Object to create an instance from
* @param {function} [callback] function to invoke after filter creation
* @return {fabric.Image.filters.ColorMatrix} Instance of fabric.Image.filters.ColorMatrix
*/
fabric.Image.filters.ColorMatrix.fromObject = fabric.Image.filters.BaseFilter.fromObject;
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
'use strict';
var fabric = global.fabric || (global.fabric = { }),
filters = fabric.Image.filters,
createClass = fabric.util.createClass;
/**
* Brightness filter class
* @class fabric.Image.filters.Brightness
* @memberOf fabric.Image.filters
* @extends fabric.Image.filters.BaseFilter
* @see {@link fabric.Image.filters.Brightness#initialize} for constructor definition
* @see {@link http://fabricjs.com/image-filters|ImageFilters demo}
* @example
* var filter = new fabric.Image.filters.Brightness({
* brightness: 0.05
* });
* object.filters.push(filter);
* object.applyFilters();
*/
filters.Brightness = createClass(filters.BaseFilter, /** @lends fabric.Image.filters.Brightness.prototype */ {
/**
* Filter type
* @param {String} type
* @default
*/
type: 'Brightness',
/**
* Fragment source for the brightness program
*/
fragmentSource: 'precision highp float;\n' +
'uniform sampler2D uTexture;\n' +
'uniform float uBrightness;\n' +
'varying vec2 vTexCoord;\n' +
'void main() {\n' +
'vec4 color = texture2D(uTexture, vTexCoord);\n' +
'color.rgb += uBrightness;\n' +
'gl_FragColor = color;\n' +
'}',
/**
* Brightness value, from -1 to 1.
* translated to -255 to 255 for 2d
* 0.0039215686 is the part of 1 that get translated to 1 in 2d
* @param {Number} brightness
* @default
*/
brightness: 0,
/**
* Describe the property that is the filter parameter
* @param {String} m
* @default
*/
mainParameter: 'brightness',
/**
* Apply the Brightness operation to a Uint8ClampedArray representing the pixels of an image.
*
* @param {Object} options
* @param {ImageData} options.imageData The Uint8ClampedArray to be filtered.
*/
applyTo2d: function(options) {
if (this.brightness === 0) {
return;
}
var imageData = options.imageData,
data = imageData.data, i, len = data.length,
brightness = Math.round(this.brightness * 255);
for (i = 0; i < len; i += 4) {
data[i] = data[i] + brightness;
data[i + 1] = data[i + 1] + brightness;
data[i + 2] = data[i + 2] + brightness;
}
},
/**
* Return WebGL uniform locations for this filter's shader.
*
* @param {WebGLRenderingContext} gl The GL canvas context used to compile this filter's shader.
* @param {WebGLShaderProgram} program This filter's compiled shader program.
*/
getUniformLocations: function(gl, program) {
return {
uBrightness: gl.getUniformLocation(program, 'uBrightness'),
};
},
/**
* Send data from this filter to its shader program's uniforms.
*
* @param {WebGLRenderingContext} gl The GL canvas context used to compile this filter's shader.
* @param {Object} uniformLocations A map of string uniform names to WebGLUniformLocation objects
*/
sendUniformData: function(gl, uniformLocations) {
gl.uniform1f(uniformLocations.uBrightness, this.brightness);
},
});
/**
* Returns filter instance from an object representation
* @static
* @param {Object} object Object to create an instance from
* @param {function} [callback] to be invoked after filter creation
* @return {fabric.Image.filters.Brightness} Instance of fabric.Image.filters.Brightness
*/
fabric.Image.filters.Brightness.fromObject = fabric.Image.filters.BaseFilter.fromObject;
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
'use strict';
var fabric = global.fabric || (global.fabric = { }),
extend = fabric.util.object.extend,
filters = fabric.Image.filters,
createClass = fabric.util.createClass;
/**
* Adapted from <a href="http://www.html5rocks.com/en/tutorials/canvas/imagefilters/">html5rocks article</a>
* @class fabric.Image.filters.Convolute
* @memberOf fabric.Image.filters
* @extends fabric.Image.filters.BaseFilter
* @see {@link fabric.Image.filters.Convolute#initialize} for constructor definition
* @see {@link http://fabricjs.com/image-filters|ImageFilters demo}
* @example <caption>Sharpen filter</caption>
* var filter = new fabric.Image.filters.Convolute({
* matrix: [ 0, -1, 0,
* -1, 5, -1,
* 0, -1, 0 ]
* });
* object.filters.push(filter);
* object.applyFilters();
* canvas.renderAll();
* @example <caption>Blur filter</caption>
* var filter = new fabric.Image.filters.Convolute({
* matrix: [ 1/9, 1/9, 1/9,
* 1/9, 1/9, 1/9,
* 1/9, 1/9, 1/9 ]
* });
* object.filters.push(filter);
* object.applyFilters();
* canvas.renderAll();
* @example <caption>Emboss filter</caption>
* var filter = new fabric.Image.filters.Convolute({
* matrix: [ 1, 1, 1,
* 1, 0.7, -1,
* -1, -1, -1 ]
* });
* object.filters.push(filter);
* object.applyFilters();
* canvas.renderAll();
* @example <caption>Emboss filter with opaqueness</caption>
* var filter = new fabric.Image.filters.Convolute({
* opaque: true,
* matrix: [ 1, 1, 1,
* 1, 0.7, -1,
* -1, -1, -1 ]
* });
* object.filters.push(filter);
* object.applyFilters();
* canvas.renderAll();
*/
filters.Convolute = createClass(filters.BaseFilter, /** @lends fabric.Image.filters.Convolute.prototype */ {
/**
* Filter type
* @param {String} type
* @default
*/
type: 'Convolute',
/*
* Opaque value (true/false)
*/
opaque: false,
/*
* matrix for the filter, max 9x9
*/
matrix: [0, 0, 0, 0, 1, 0, 0, 0, 0],
/**
* Fragment source for the brightness program
*/
fragmentSource: {
Convolute_3_1: 'precision highp float;\n' +
'uniform sampler2D uTexture;\n' +
'uniform float uMatrix[9];\n' +
'uniform float uStepW;\n' +
'uniform float uStepH;\n' +
'varying vec2 vTexCoord;\n' +
'void main() {\n' +
'vec4 color = vec4(0, 0, 0, 0);\n' +
'for (float h = 0.0; h < 3.0; h+=1.0) {\n' +
'for (float w = 0.0; w < 3.0; w+=1.0) {\n' +
'vec2 matrixPos = vec2(uStepW * (w - 1), uStepH * (h - 1));\n' +
'color += texture2D(uTexture, vTexCoord + matrixPos) * uMatrix[int(h * 3.0 + w)];\n' +
'}\n' +
'}\n' +
'gl_FragColor = color;\n' +
'}',
Convolute_3_0: 'precision highp float;\n' +
'uniform sampler2D uTexture;\n' +
'uniform float uMatrix[9];\n' +
'uniform float uStepW;\n' +
'uniform float uStepH;\n' +
'varying vec2 vTexCoord;\n' +
'void main() {\n' +
'vec4 color = vec4(0, 0, 0, 1);\n' +
'for (float h = 0.0; h < 3.0; h+=1.0) {\n' +
'for (float w = 0.0; w < 3.0; w+=1.0) {\n' +
'vec2 matrixPos = vec2(uStepW * (w - 1.0), uStepH * (h - 1.0));\n' +
'color.rgb += texture2D(uTexture, vTexCoord + matrixPos).rgb * uMatrix[int(h * 3.0 + w)];\n' +
'}\n' +
'}\n' +
'float alpha = texture2D(uTexture, vTexCoord).a;\n' +
'gl_FragColor = color;\n' +
'gl_FragColor.a = alpha;\n' +
'}',
Convolute_5_1: 'precision highp float;\n' +
'uniform sampler2D uTexture;\n' +
'uniform float uMatrix[25];\n' +
'uniform float uStepW;\n' +
'uniform float uStepH;\n' +
'varying vec2 vTexCoord;\n' +
'void main() {\n' +
'vec4 color = vec4(0, 0, 0, 0);\n' +
'for (float h = 0.0; h < 5.0; h+=1.0) {\n' +
'for (float w = 0.0; w < 5.0; w+=1.0) {\n' +
'vec2 matrixPos = vec2(uStepW * (w - 2.0), uStepH * (h - 2.0));\n' +
'color += texture2D(uTexture, vTexCoord + matrixPos) * uMatrix[int(h * 5.0 + w)];\n' +
'}\n' +
'}\n' +
'gl_FragColor = color;\n' +
'}',
Convolute_5_0: 'precision highp float;\n' +
'uniform sampler2D uTexture;\n' +
'uniform float uMatrix[25];\n' +
'uniform float uStepW;\n' +
'uniform float uStepH;\n' +
'varying vec2 vTexCoord;\n' +
'void main() {\n' +
'vec4 color = vec4(0, 0, 0, 1);\n' +
'for (float h = 0.0; h < 5.0; h+=1.0) {\n' +
'for (float w = 0.0; w < 5.0; w+=1.0) {\n' +
'vec2 matrixPos = vec2(uStepW * (w - 2.0), uStepH * (h - 2.0));\n' +
'color.rgb += texture2D(uTexture, vTexCoord + matrixPos).rgb * uMatrix[int(h * 5.0 + w)];\n' +
'}\n' +
'}\n' +
'float alpha = texture2D(uTexture, vTexCoord).a;\n' +
'gl_FragColor = color;\n' +
'gl_FragColor.a = alpha;\n' +
'}',
Convolute_7_1: 'precision highp float;\n' +
'uniform sampler2D uTexture;\n' +
'uniform float uMatrix[49];\n' +
'uniform float uStepW;\n' +
'uniform float uStepH;\n' +
'varying vec2 vTexCoord;\n' +
'void main() {\n' +
'vec4 color = vec4(0, 0, 0, 0);\n' +
'for (float h = 0.0; h < 7.0; h+=1.0) {\n' +
'for (float w = 0.0; w < 7.0; w+=1.0) {\n' +
'vec2 matrixPos = vec2(uStepW * (w - 3.0), uStepH * (h - 3.0));\n' +
'color += texture2D(uTexture, vTexCoord + matrixPos) * uMatrix[int(h * 7.0 + w)];\n' +
'}\n' +
'}\n' +
'gl_FragColor = color;\n' +
'}',
Convolute_7_0: 'precision highp float;\n' +
'uniform sampler2D uTexture;\n' +
'uniform float uMatrix[49];\n' +
'uniform float uStepW;\n' +
'uniform float uStepH;\n' +
'varying vec2 vTexCoord;\n' +
'void main() {\n' +
'vec4 color = vec4(0, 0, 0, 1);\n' +
'for (float h = 0.0; h < 7.0; h+=1.0) {\n' +
'for (float w = 0.0; w < 7.0; w+=1.0) {\n' +
'vec2 matrixPos = vec2(uStepW * (w - 3.0), uStepH * (h - 3.0));\n' +
'color.rgb += texture2D(uTexture, vTexCoord + matrixPos).rgb * uMatrix[int(h * 7.0 + w)];\n' +
'}\n' +
'}\n' +
'float alpha = texture2D(uTexture, vTexCoord).a;\n' +
'gl_FragColor = color;\n' +
'gl_FragColor.a = alpha;\n' +
'}',
Convolute_9_1: 'precision highp float;\n' +
'uniform sampler2D uTexture;\n' +
'uniform float uMatrix[81];\n' +
'uniform float uStepW;\n' +
'uniform float uStepH;\n' +
'varying vec2 vTexCoord;\n' +
'void main() {\n' +
'vec4 color = vec4(0, 0, 0, 0);\n' +
'for (float h = 0.0; h < 9.0; h+=1.0) {\n' +
'for (float w = 0.0; w < 9.0; w+=1.0) {\n' +
'vec2 matrixPos = vec2(uStepW * (w - 4.0), uStepH * (h - 4.0));\n' +
'color += texture2D(uTexture, vTexCoord + matrixPos) * uMatrix[int(h * 9.0 + w)];\n' +
'}\n' +
'}\n' +
'gl_FragColor = color;\n' +
'}',
Convolute_9_0: 'precision highp float;\n' +
'uniform sampler2D uTexture;\n' +
'uniform float uMatrix[81];\n' +
'uniform float uStepW;\n' +
'uniform float uStepH;\n' +
'varying vec2 vTexCoord;\n' +
'void main() {\n' +
'vec4 color = vec4(0, 0, 0, 1);\n' +
'for (float h = 0.0; h < 9.0; h+=1.0) {\n' +
'for (float w = 0.0; w < 9.0; w+=1.0) {\n' +
'vec2 matrixPos = vec2(uStepW * (w - 4.0), uStepH * (h - 4.0));\n' +
'color.rgb += texture2D(uTexture, vTexCoord + matrixPos).rgb * uMatrix[int(h * 9.0 + w)];\n' +
'}\n' +
'}\n' +
'float alpha = texture2D(uTexture, vTexCoord).a;\n' +
'gl_FragColor = color;\n' +
'gl_FragColor.a = alpha;\n' +
'}',
},
/**
* Constructor
* @memberOf fabric.Image.filters.Convolute.prototype
* @param {Object} [options] Options object
* @param {Boolean} [options.opaque=false] Opaque value (true/false)
* @param {Array} [options.matrix] Filter matrix
*/
/**
* Retrieves the cached shader.
* @param {Object} options
* @param {WebGLRenderingContext} options.context The GL context used for rendering.
* @param {Object} options.programCache A map of compiled shader programs, keyed by filter type.
*/
retrieveShader: function(options) {
var size = Math.sqrt(this.matrix.length);
var cacheKey = this.type + '_' + size + '_' + (this.opaque ? 1 : 0);
var shaderSource = this.fragmentSource[cacheKey];
if (!options.programCache.hasOwnProperty(cacheKey)) {
options.programCache[cacheKey] = this.createProgram(options.context, shaderSource);
}
return options.programCache[cacheKey];
},
/**
* Apply the Brightness operation to a Uint8ClampedArray representing the pixels of an image.
*
* @param {Object} options
* @param {ImageData} options.imageData The Uint8ClampedArray to be filtered.
*/
applyTo2d: function(options) {
var imageData = options.imageData,
data = imageData.data,
weights = this.matrix,
side = Math.round(Math.sqrt(weights.length)),
halfSide = Math.floor(side / 2),
sw = imageData.width,
sh = imageData.height,
output = options.ctx.createImageData(sw, sh),
dst = output.data,
// go through the destination image pixels
alphaFac = this.opaque ? 1 : 0,
r, g, b, a, dstOff,
scx, scy, srcOff, wt,
x, y, cx, cy;
for (y = 0; y < sh; y++) {
for (x = 0; x < sw; x++) {
dstOff = (y * sw + x) * 4;
// calculate the weighed sum of the source image pixels that
// fall under the convolution matrix
r = 0; g = 0; b = 0; a = 0;
for (cy = 0; cy < side; cy++) {
for (cx = 0; cx < side; cx++) {
scy = y + cy - halfSide;
scx = x + cx - halfSide;
// eslint-disable-next-line max-depth
if (scy < 0 || scy > sh || scx < 0 || scx > sw) {
continue;
}
srcOff = (scy * sw + scx) * 4;
wt = weights[cy * side + cx];
r += data[srcOff] * wt;
g += data[srcOff + 1] * wt;
b += data[srcOff + 2] * wt;
// eslint-disable-next-line max-depth
if (!alphaFac) {
a += data[srcOff + 3] * wt;
}
}
}
dst[dstOff] = r;
dst[dstOff + 1] = g;
dst[dstOff + 2] = b;
if (!alphaFac) {
dst[dstOff + 3] = a;
}
else {
dst[dstOff + 3] = data[dstOff + 3];
}
}
}
options.imageData = output;
},
/**
* Return WebGL uniform locations for this filter's shader.
*
* @param {WebGLRenderingContext} gl The GL canvas context used to compile this filter's shader.
* @param {WebGLShaderProgram} program This filter's compiled shader program.
*/
getUniformLocations: function(gl, program) {
return {
uMatrix: gl.getUniformLocation(program, 'uMatrix'),
uOpaque: gl.getUniformLocation(program, 'uOpaque'),
uHalfSize: gl.getUniformLocation(program, 'uHalfSize'),
uSize: gl.getUniformLocation(program, 'uSize'),
};
},
/**
* Send data from this filter to its shader program's uniforms.
*
* @param {WebGLRenderingContext} gl The GL canvas context used to compile this filter's shader.
* @param {Object} uniformLocations A map of string uniform names to WebGLUniformLocation objects
*/
sendUniformData: function(gl, uniformLocations) {
gl.uniform1fv(uniformLocations.uMatrix, this.matrix);
},
/**
* Returns object representation of an instance
* @return {Object} Object representation of an instance
*/
toObject: function() {
return extend(this.callSuper('toObject'), {
opaque: this.opaque,
matrix: this.matrix
});
}
});
/**
* Returns filter instance from an object representation
* @static
* @param {Object} object Object to create an instance from
* @param {function} [callback] to be invoked after filter creation
* @return {fabric.Image.filters.Convolute} Instance of fabric.Image.filters.Convolute
*/
fabric.Image.filters.Convolute.fromObject = fabric.Image.filters.BaseFilter.fromObject;
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
'use strict';
var fabric = global.fabric || (global.fabric = { }),
filters = fabric.Image.filters,
createClass = fabric.util.createClass;
/**
* Grayscale image filter class
* @class fabric.Image.filters.Grayscale
* @memberOf fabric.Image.filters
* @extends fabric.Image.filters.BaseFilter
* @see {@link http://fabricjs.com/image-filters|ImageFilters demo}
* @example
* var filter = new fabric.Image.filters.Grayscale();
* object.filters.push(filter);
* object.applyFilters();
*/
filters.Grayscale = createClass(filters.BaseFilter, /** @lends fabric.Image.filters.Grayscale.prototype */ {
/**
* Filter type
* @param {String} type
* @default
*/
type: 'Grayscale',
fragmentSource: {
average: 'precision highp float;\n' +
'uniform sampler2D uTexture;\n' +
'varying vec2 vTexCoord;\n' +
'void main() {\n' +
'vec4 color = texture2D(uTexture, vTexCoord);\n' +
'float average = (color.r + color.b + color.g) / 3.0;\n' +
'gl_FragColor = vec4(average, average, average, color.a);\n' +
'}',
lightness: 'precision highp float;\n' +
'uniform sampler2D uTexture;\n' +
'uniform int uMode;\n' +
'varying vec2 vTexCoord;\n' +
'void main() {\n' +
'vec4 col = texture2D(uTexture, vTexCoord);\n' +
'float average = (max(max(col.r, col.g),col.b) + min(min(col.r, col.g),col.b)) / 2.0;\n' +
'gl_FragColor = vec4(average, average, average, col.a);\n' +
'}',
luminosity: 'precision highp float;\n' +
'uniform sampler2D uTexture;\n' +
'uniform int uMode;\n' +
'varying vec2 vTexCoord;\n' +
'void main() {\n' +
'vec4 col = texture2D(uTexture, vTexCoord);\n' +
'float average = 0.21 * col.r + 0.72 * col.g + 0.07 * col.b;\n' +
'gl_FragColor = vec4(average, average, average, col.a);\n' +
'}',
},
/**
* Grayscale mode, between 'average', 'lightness', 'luminosity'
* @param {String} type
* @default
*/
mode: 'average',
mainParameter: 'mode',
/**
* Apply the Grayscale operation to a Uint8Array representing the pixels of an image.
*
* @param {Object} options
* @param {ImageData} options.imageData The Uint8Array to be filtered.
*/
applyTo2d: function(options) {
var imageData = options.imageData,
data = imageData.data, i,
len = data.length, value,
mode = this.mode;
for (i = 0; i < len; i += 4) {
if (mode === 'average') {
value = (data[i] + data[i + 1] + data[i + 2]) / 3;
}
else if (mode === 'lightness') {
value = (Math.min(data[i], data[i + 1], data[i + 2]) +
Math.max(data[i], data[i + 1], data[i + 2])) / 2;
}
else if (mode === 'luminosity') {
value = 0.21 * data[i] + 0.72 * data[i + 1] + 0.07 * data[i + 2];
}
data[i] = value;
data[i + 1] = value;
data[i + 2] = value;
}
},
/**
* Retrieves the cached shader.
* @param {Object} options
* @param {WebGLRenderingContext} options.context The GL context used for rendering.
* @param {Object} options.programCache A map of compiled shader programs, keyed by filter type.
*/
retrieveShader: function(options) {
var cacheKey = this.type + '_' + this.mode;
if (!options.programCache.hasOwnProperty(cacheKey)) {
var shaderSource = this.fragmentSource[this.mode];
options.programCache[cacheKey] = this.createProgram(options.context, shaderSource);
}
return options.programCache[cacheKey];
},
/**
* Return WebGL uniform locations for this filter's shader.
*
* @param {WebGLRenderingContext} gl The GL canvas context used to compile this filter's shader.
* @param {WebGLShaderProgram} program This filter's compiled shader program.
*/
getUniformLocations: function(gl, program) {
return {
uMode: gl.getUniformLocation(program, 'uMode'),
};
},
/**
* Send data from this filter to its shader program's uniforms.
*
* @param {WebGLRenderingContext} gl The GL canvas context used to compile this filter's shader.
* @param {Object} uniformLocations A map of string uniform names to WebGLUniformLocation objects
*/
sendUniformData: function(gl, uniformLocations) {
// default average mode.
var mode = 1;
gl.uniform1i(uniformLocations.uMode, mode);
},
/**
* Grayscale filter isNeutralState implementation
* The filter is never neutral
* on the image
**/
isNeutralState: function() {
return false;
},
});
/**
* Returns filter instance from an object representation
* @static
* @param {Object} object Object to create an instance from
* @param {function} [callback] to be invoked after filter creation
* @return {fabric.Image.filters.Grayscale} Instance of fabric.Image.filters.Grayscale
*/
fabric.Image.filters.Grayscale.fromObject = fabric.Image.filters.BaseFilter.fromObject;
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
'use strict';
var fabric = global.fabric || (global.fabric = { }),
filters = fabric.Image.filters,
createClass = fabric.util.createClass;
/**
* Invert filter class
* @class fabric.Image.filters.Invert
* @memberOf fabric.Image.filters
* @extends fabric.Image.filters.BaseFilter
* @see {@link http://fabricjs.com/image-filters|ImageFilters demo}
* @example
* var filter = new fabric.Image.filters.Invert();
* object.filters.push(filter);
* object.applyFilters(canvas.renderAll.bind(canvas));
*/
filters.Invert = createClass(filters.BaseFilter, /** @lends fabric.Image.filters.Invert.prototype */ {
/**
* Filter type
* @param {String} type
* @default
*/
type: 'Invert',
fragmentSource: 'precision highp float;\n' +
'uniform sampler2D uTexture;\n' +
'uniform int uInvert;\n' +
'varying vec2 vTexCoord;\n' +
'void main() {\n' +
'vec4 color = texture2D(uTexture, vTexCoord);\n' +
'if (uInvert == 1) {\n' +
'gl_FragColor = vec4(1.0 - color.r,1.0 -color.g,1.0 -color.b,color.a);\n' +
'} else {\n' +
'gl_FragColor = color;\n' +
'}\n' +
'}',
/**
* Filter invert. if false, does nothing
* @param {Boolean} invert
* @default
*/
invert: true,
mainParameter: 'invert',
/**
* Apply the Invert operation to a Uint8Array representing the pixels of an image.
*
* @param {Object} options
* @param {ImageData} options.imageData The Uint8Array to be filtered.
*/
applyTo2d: function(options) {
var imageData = options.imageData,
data = imageData.data, i,
len = data.length;
for (i = 0; i < len; i += 4) {
data[i] = 255 - data[i];
data[i + 1] = 255 - data[i + 1];
data[i + 2] = 255 - data[i + 2];
}
},
/**
* Invert filter isNeutralState implementation
* Used only in image applyFilters to discard filters that will not have an effect
* on the image
* @param {Object} options
**/
isNeutralState: function() {
return !this.invert;
},
/**
* Return WebGL uniform locations for this filter's shader.
*
* @param {WebGLRenderingContext} gl The GL canvas context used to compile this filter's shader.
* @param {WebGLShaderProgram} program This filter's compiled shader program.
*/
getUniformLocations: function(gl, program) {
return {
uInvert: gl.getUniformLocation(program, 'uInvert'),
};
},
/**
* Send data from this filter to its shader program's uniforms.
*
* @param {WebGLRenderingContext} gl The GL canvas context used to compile this filter's shader.
* @param {Object} uniformLocations A map of string uniform names to WebGLUniformLocation objects
*/
sendUniformData: function(gl, uniformLocations) {
gl.uniform1i(uniformLocations.uInvert, this.invert);
},
});
/**
* Returns filter instance from an object representation
* @static
* @param {Object} object Object to create an instance from
* @param {function} [callback] to be invoked after filter creation
* @return {fabric.Image.filters.Invert} Instance of fabric.Image.filters.Invert
*/
fabric.Image.filters.Invert.fromObject = fabric.Image.filters.BaseFilter.fromObject;
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
'use strict';
var fabric = global.fabric || (global.fabric = { }),
extend = fabric.util.object.extend,
filters = fabric.Image.filters,
createClass = fabric.util.createClass;
/**
* Noise filter class
* @class fabric.Image.filters.Noise
* @memberOf fabric.Image.filters
* @extends fabric.Image.filters.BaseFilter
* @see {@link fabric.Image.filters.Noise#initialize} for constructor definition
* @see {@link http://fabricjs.com/image-filters|ImageFilters demo}
* @example
* var filter = new fabric.Image.filters.Noise({
* noise: 700
* });
* object.filters.push(filter);
* object.applyFilters();
* canvas.renderAll();
*/
filters.Noise = createClass(filters.BaseFilter, /** @lends fabric.Image.filters.Noise.prototype */ {
/**
* Filter type
* @param {String} type
* @default
*/
type: 'Noise',
/**
* Fragment source for the noise program
*/
fragmentSource: 'precision highp float;\n' +
'uniform sampler2D uTexture;\n' +
'uniform float uStepH;\n' +
'uniform float uNoise;\n' +
'uniform float uSeed;\n' +
'varying vec2 vTexCoord;\n' +
'float rand(vec2 co, float seed, float vScale) {\n' +
'return fract(sin(dot(co.xy * vScale ,vec2(12.9898 , 78.233))) * 43758.5453 * (seed + 0.01) / 2.0);\n' +
'}\n' +
'void main() {\n' +
'vec4 color = texture2D(uTexture, vTexCoord);\n' +
'color.rgb += (0.5 - rand(vTexCoord, uSeed, 0.1 / uStepH)) * uNoise;\n' +
'gl_FragColor = color;\n' +
'}',
/**
* Describe the property that is the filter parameter
* @param {String} m
* @default
*/
mainParameter: 'noise',
/**
* Noise value, from
* @param {Number} noise
* @default
*/
noise: 0,
/**
* Apply the Brightness operation to a Uint8ClampedArray representing the pixels of an image.
*
* @param {Object} options
* @param {ImageData} options.imageData The Uint8ClampedArray to be filtered.
*/
applyTo2d: function(options) {
if (this.noise === 0) {
return;
}
var imageData = options.imageData,
data = imageData.data, i, len = data.length,
noise = this.noise, rand;
for (i = 0, len = data.length; i < len; i += 4) {
rand = (0.5 - Math.random()) * noise;
data[i] += rand;
data[i + 1] += rand;
data[i + 2] += rand;
}
},
/**
* Return WebGL uniform locations for this filter's shader.
*
* @param {WebGLRenderingContext} gl The GL canvas context used to compile this filter's shader.
* @param {WebGLShaderProgram} program This filter's compiled shader program.
*/
getUniformLocations: function(gl, program) {
return {
uNoise: gl.getUniformLocation(program, 'uNoise'),
uSeed: gl.getUniformLocation(program, 'uSeed'),
};
},
/**
* Send data from this filter to its shader program's uniforms.
*
* @param {WebGLRenderingContext} gl The GL canvas context used to compile this filter's shader.
* @param {Object} uniformLocations A map of string uniform names to WebGLUniformLocation objects
*/
sendUniformData: function(gl, uniformLocations) {
gl.uniform1f(uniformLocations.uNoise, this.noise / 255);
gl.uniform1f(uniformLocations.uSeed, Math.random());
},
/**
* Returns object representation of an instance
* @return {Object} Object representation of an instance
*/
toObject: function() {
return extend(this.callSuper('toObject'), {
noise: this.noise
});
}
});
/**
* Returns filter instance from an object representation
* @static
* @param {Object} object Object to create an instance from
* @param {Function} [callback] to be invoked after filter creation
* @return {fabric.Image.filters.Noise} Instance of fabric.Image.filters.Noise
*/
fabric.Image.filters.Noise.fromObject = fabric.Image.filters.BaseFilter.fromObject;
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
'use strict';
var fabric = global.fabric || (global.fabric = { }),
filters = fabric.Image.filters,
createClass = fabric.util.createClass;
/**
* Pixelate filter class
* @class fabric.Image.filters.Pixelate
* @memberOf fabric.Image.filters
* @extends fabric.Image.filters.BaseFilter
* @see {@link fabric.Image.filters.Pixelate#initialize} for constructor definition
* @see {@link http://fabricjs.com/image-filters|ImageFilters demo}
* @example
* var filter = new fabric.Image.filters.Pixelate({
* blocksize: 8
* });
* object.filters.push(filter);
* object.applyFilters();
*/
filters.Pixelate = createClass(filters.BaseFilter, /** @lends fabric.Image.filters.Pixelate.prototype */ {
/**
* Filter type
* @param {String} type
* @default
*/
type: 'Pixelate',
blocksize: 4,
mainParameter: 'blocksize',
/**
* Fragment source for the Pixelate program
*/
fragmentSource: 'precision highp float;\n' +
'uniform sampler2D uTexture;\n' +
'uniform float uBlocksize;\n' +
'uniform float uStepW;\n' +
'uniform float uStepH;\n' +
'varying vec2 vTexCoord;\n' +
'void main() {\n' +
'float blockW = uBlocksize * uStepW;\n' +
'float blockH = uBlocksize * uStepW;\n' +
'int posX = int(vTexCoord.x / blockW);\n' +
'int posY = int(vTexCoord.y / blockH);\n' +
'float fposX = float(posX);\n' +
'float fposY = float(posY);\n' +
'vec2 squareCoords = vec2(fposX * blockW, fposY * blockH);\n' +
'vec4 color = texture2D(uTexture, squareCoords);\n' +
'gl_FragColor = color;\n' +
'}',
/**
* Apply the Pixelate operation to a Uint8ClampedArray representing the pixels of an image.
*
* @param {Object} options
* @param {ImageData} options.imageData The Uint8ClampedArray to be filtered.
*/
applyTo2d: function(options) {
var imageData = options.imageData,
data = imageData.data,
iLen = imageData.height,
jLen = imageData.width,
index, i, j, r, g, b, a,
_i, _j, _iLen, _jLen;
for (i = 0; i < iLen; i += this.blocksize) {
for (j = 0; j < jLen; j += this.blocksize) {
index = (i * 4) * jLen + (j * 4);
r = data[index];
g = data[index + 1];
b = data[index + 2];
a = data[index + 3];
_iLen = Math.min(i + this.blocksize, iLen);
_jLen = Math.min(j + this.blocksize, jLen);
for (_i = i; _i < _iLen; _i++) {
for (_j = j; _j < _jLen; _j++) {
index = (_i * 4) * jLen + (_j * 4);
data[index] = r;
data[index + 1] = g;
data[index + 2] = b;
data[index + 3] = a;
}
}
}
}
},
/**
* Indicate when the filter is not gonna apply changes to the image
**/
isNeutralState: function() {
return this.blocksize === 1;
},
/**
* Return WebGL uniform locations for this filter's shader.
*
* @param {WebGLRenderingContext} gl The GL canvas context used to compile this filter's shader.
* @param {WebGLShaderProgram} program This filter's compiled shader program.
*/
getUniformLocations: function(gl, program) {
return {
uBlocksize: gl.getUniformLocation(program, 'uBlocksize'),
uStepW: gl.getUniformLocation(program, 'uStepW'),
uStepH: gl.getUniformLocation(program, 'uStepH'),
};
},
/**
* Send data from this filter to its shader program's uniforms.
*
* @param {WebGLRenderingContext} gl The GL canvas context used to compile this filter's shader.
* @param {Object} uniformLocations A map of string uniform names to WebGLUniformLocation objects
*/
sendUniformData: function(gl, uniformLocations) {
gl.uniform1f(uniformLocations.uBlocksize, this.blocksize);
},
});
/**
* Returns filter instance from an object representation
* @static
* @param {Object} object Object to create an instance from
* @param {Function} [callback] to be invoked after filter creation
* @return {fabric.Image.filters.Pixelate} Instance of fabric.Image.filters.Pixelate
*/
fabric.Image.filters.Pixelate.fromObject = fabric.Image.filters.BaseFilter.fromObject;
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
'use strict';
var fabric = global.fabric || (global.fabric = { }),
extend = fabric.util.object.extend,
filters = fabric.Image.filters,
createClass = fabric.util.createClass;
/**
* Remove white filter class
* @class fabric.Image.filters.RemoveColor
* @memberOf fabric.Image.filters
* @extends fabric.Image.filters.BaseFilter
* @see {@link fabric.Image.filters.RemoveColor#initialize} for constructor definition
* @see {@link http://fabricjs.com/image-filters|ImageFilters demo}
* @example
* var filter = new fabric.Image.filters.RemoveColor({
* threshold: 0.2,
* });
* object.filters.push(filter);
* object.applyFilters();
* canvas.renderAll();
*/
filters.RemoveColor = createClass(filters.BaseFilter, /** @lends fabric.Image.filters.RemoveColor.prototype */ {
/**
* Filter type
* @param {String} type
* @default
*/
type: 'RemoveColor',
/**
* Color to remove, in any format understood by fabric.Color.
* @param {String} type
* @default
*/
color: '#FFFFFF',
/**
* Fragment source for the brightness program
*/
fragmentSource: 'precision highp float;\n' +
'uniform sampler2D uTexture;\n' +
'uniform vec4 uLow;\n' +
'uniform vec4 uHigh;\n' +
'varying vec2 vTexCoord;\n' +
'void main() {\n' +
'gl_FragColor = texture2D(uTexture, vTexCoord);\n' +
'if(all(greaterThan(gl_FragColor.rgb,uLow.rgb)) && all(greaterThan(uHigh.rgb,gl_FragColor.rgb))) {\n' +
'gl_FragColor.a = 0.0;\n' +
'}\n' +
'}',
/**
* distance to actual color, as value up or down from each r,g,b
* between 0 and 1
**/
distance: 0.02,
/**
* For color to remove inside distance, use alpha channel for a smoother deletion
* NOT IMPLEMENTED YET
**/
useAlpha: false,
/**
* Constructor
* @memberOf fabric.Image.filters.RemoveWhite.prototype
* @param {Object} [options] Options object
* @param {Number} [options.color=#RRGGBB] Threshold value
* @param {Number} [options.distance=10] Distance value
*/
/**
* Applies filter to canvas element
* @param {Object} canvasEl Canvas element to apply filter to
*/
applyTo2d: function(options) {
var imageData = options.imageData,
data = imageData.data, i,
distance = this.distance * 255,
r, g, b,
source = new fabric.Color(this.color).getSource(),
lowC = [
source[0] - distance,
source[1] - distance,
source[2] - distance,
],
highC = [
source[0] + distance,
source[1] + distance,
source[2] + distance,
];
for (i = 0; i < data.length; i += 4) {
r = data[i];
g = data[i + 1];
b = data[i + 2];
if (r > lowC[0] &&
g > lowC[1] &&
b > lowC[2] &&
r < highC[0] &&
g < highC[1] &&
b < highC[2]) {
data[i + 3] = 0;
}
}
},
/**
* Return WebGL uniform locations for this filter's shader.
*
* @param {WebGLRenderingContext} gl The GL canvas context used to compile this filter's shader.
* @param {WebGLShaderProgram} program This filter's compiled shader program.
*/
getUniformLocations: function(gl, program) {
return {
uLow: gl.getUniformLocation(program, 'uLow'),
uHigh: gl.getUniformLocation(program, 'uHigh'),
};
},
/**
* Send data from this filter to its shader program's uniforms.
*
* @param {WebGLRenderingContext} gl The GL canvas context used to compile this filter's shader.
* @param {Object} uniformLocations A map of string uniform names to WebGLUniformLocation objects
*/
sendUniformData: function(gl, uniformLocations) {
var source = new fabric.Color(this.color).getSource(),
distance = parseFloat(this.distance),
lowC = [
0 + source[0] / 255 - distance,
0 + source[1] / 255 - distance,
0 + source[2] / 255 - distance,
1
],
highC = [
source[0] / 255 + distance,
source[1] / 255 + distance,
source[2] / 255 + distance,
1
];
gl.uniform4fv(uniformLocations.uLow, lowC);
gl.uniform4fv(uniformLocations.uHigh, highC);
},
/**
* Returns object representation of an instance
* @return {Object} Object representation of an instance
*/
toObject: function() {
return extend(this.callSuper('toObject'), {
color: this.color,
distance: this.distance
});
}
});
/**
* Returns filter instance from an object representation
* @static
* @param {Object} object Object to create an instance from
* @param {Function} [callback] to be invoked after filter creation
* @return {fabric.Image.filters.RemoveColor} Instance of fabric.Image.filters.RemoveWhite
*/
fabric.Image.filters.RemoveColor.fromObject = fabric.Image.filters.BaseFilter.fromObject;
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
'use strict';
var fabric = global.fabric || (global.fabric = { }),
filters = fabric.Image.filters,
createClass = fabric.util.createClass;
var matrices = {
Brownie: [
0.59970,0.34553,-0.27082,0,0.186,
-0.03770,0.86095,0.15059,0,-0.1449,
0.24113,-0.07441,0.44972,0,-0.02965,
0,0,0,1,0
],
Vintage: [
0.62793,0.32021,-0.03965,0,0.03784,
0.02578,0.64411,0.03259,0,0.02926,
0.04660,-0.08512,0.52416,0,0.02023,
0,0,0,1,0
],
Kodachrome: [
1.12855,-0.39673,-0.03992,0,0.24991,
-0.16404,1.08352,-0.05498,0,0.09698,
-0.16786,-0.56034,1.60148,0,0.13972,
0,0,0,1,0
],
Technicolor: [
1.91252,-0.85453,-0.09155,0,0.04624,
-0.30878,1.76589,-0.10601,0,-0.27589,
-0.23110,-0.75018,1.84759,0,0.12137,
0,0,0,1,0
],
Polaroid: [
1.438,-0.062,-0.062,0,0,
-0.122,1.378,-0.122,0,0,
-0.016,-0.016,1.483,0,0,
0,0,0,1,0
],
Sepia: [
0.393, 0.769, 0.189, 0, 0,
0.349, 0.686, 0.168, 0, 0,
0.272, 0.534, 0.131, 0, 0,
0, 0, 0, 1, 0
],
BlackWhite: [
1.5, 1.5, 1.5, 0, -1,
1.5, 1.5, 1.5, 0, -1,
1.5, 1.5, 1.5, 0, -1,
0, 0, 0, 1, 0,
]
};
for (var key in matrices) {
filters[key] = createClass(filters.ColorMatrix, /** @lends fabric.Image.filters.Sepia.prototype */ {
/**
* Filter type
* @param {String} type
* @default
*/
type: key,
/**
* Colormatrix for the effect
* array of 20 floats. Numbers in positions 4, 9, 14, 19 loose meaning
* outside the -1, 1 range.
* @param {Array} matrix array of 20 numbers.
* @default
*/
matrix: matrices[key],
/**
* Lock the matrix export for this kind of static, parameter less filters.
*/
mainParameter: false,
/**
* Lock the colormatrix on the color part, skipping alpha
*/
colorsOnly: true,
});
fabric.Image.filters[key].fromObject = fabric.Image.filters.BaseFilter.fromObject;
}
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
'use strict';
var fabric = global.fabric,
filters = fabric.Image.filters,
createClass = fabric.util.createClass;
/**
* Color Blend filter class
* @class fabric.Image.filter.BlendColor
* @memberOf fabric.Image.filters
* @extends fabric.Image.filters.BaseFilter
* @example
* var filter = new fabric.Image.filters.BlendColor({
* color: '#000',
* mode: 'multiply'
* });
*
* var filter = new fabric.Image.filters.BlendImage({
* image: fabricImageObject,
* mode: 'multiply',
* alpha: 0.5
* });
* object.filters.push(filter);
* object.applyFilters();
* canvas.renderAll();
*/
filters.BlendColor = createClass(filters.BaseFilter, /** @lends fabric.Image.filters.Blend.prototype */ {
type: 'BlendColor',
/**
* Color to make the blend operation with. default to a reddish color since black or white
* gives always strong result.
**/
color: '#F95C63',
/**
* Blend mode for the filter: one of multiply, add, diff, screen, subtract,
* darken, lighten, overlay, exclusion, tint.
**/
mode: 'multiply',
/**
* alpha value. represent the strength of the blend color operation.
**/
alpha: 1,
/**
* Fragment source for the Multiply program
*/
fragmentSource: {
multiply: 'gl_FragColor.rgb *= uColor.rgb;\n',
screen: 'gl_FragColor.rgb = 1.0 - (1.0 - gl_FragColor.rgb) * (1.0 - uColor.rgb);\n',
add: 'gl_FragColor.rgb += uColor.rgb;\n',
diff: 'gl_FragColor.rgb = abs(gl_FragColor.rgb - uColor.rgb);\n',
subtract: 'gl_FragColor.rgb -= uColor.rgb;\n',
lighten: 'gl_FragColor.rgb = max(gl_FragColor.rgb, uColor.rgb);\n',
darken: 'gl_FragColor.rgb = min(gl_FragColor.rgb, uColor.rgb);\n',
exclusion: 'gl_FragColor.rgb += uColor.rgb - 2.0 * (uColor.rgb * gl_FragColor.rgb);\n',
overlay: 'if (uColor.r < 0.5) {\n' +
'gl_FragColor.r *= 2.0 * uColor.r;\n' +
'} else {\n' +
'gl_FragColor.r = 1.0 - 2.0 * (1.0 - gl_FragColor.r) * (1.0 - uColor.r);\n' +
'}\n' +
'if (uColor.g < 0.5) {\n' +
'gl_FragColor.g *= 2.0 * uColor.g;\n' +
'} else {\n' +
'gl_FragColor.g = 1.0 - 2.0 * (1.0 - gl_FragColor.g) * (1.0 - uColor.g);\n' +
'}\n' +
'if (uColor.b < 0.5) {\n' +
'gl_FragColor.b *= 2.0 * uColor.b;\n' +
'} else {\n' +
'gl_FragColor.b = 1.0 - 2.0 * (1.0 - gl_FragColor.b) * (1.0 - uColor.b);\n' +
'}\n',
tint: 'gl_FragColor.rgb *= (1.0 - uColor.a);\n' +
'gl_FragColor.rgb += uColor.rgb;\n',
},
/**
* build the fragment source for the filters, joining the common part with
* the specific one.
* @param {String} mode the mode of the filter, a key of this.fragmentSource
* @return {String} the source to be compiled
* @private
*/
buildSource: function(mode) {
return 'precision highp float;\n' +
'uniform sampler2D uTexture;\n' +
'uniform vec4 uColor;\n' +
'varying vec2 vTexCoord;\n' +
'void main() {\n' +
'vec4 color = texture2D(uTexture, vTexCoord);\n' +
'gl_FragColor = color;\n' +
'if (color.a > 0.0) {\n' +
this.fragmentSource[mode] +
'}\n' +
'}';
},
/**
* Retrieves the cached shader.
* @param {Object} options
* @param {WebGLRenderingContext} options.context The GL context used for rendering.
* @param {Object} options.programCache A map of compiled shader programs, keyed by filter type.
*/
retrieveShader: function(options) {
var cacheKey = this.type + '_' + this.mode, shaderSource;
if (!options.programCache.hasOwnProperty(cacheKey)) {
shaderSource = this.buildSource(this.mode);
options.programCache[cacheKey] = this.createProgram(options.context, shaderSource);
}
return options.programCache[cacheKey];
},
/**
* Apply the Blend operation to a Uint8ClampedArray representing the pixels of an image.
*
* @param {Object} options
* @param {ImageData} options.imageData The Uint8ClampedArray to be filtered.
*/
applyTo2d: function(options) {
var imageData = options.imageData,
data = imageData.data, iLen = data.length,
tr, tg, tb,
r, g, b,
source, alpha1 = 1 - this.alpha;
source = new fabric.Color(this.color).getSource();
tr = source[0] * this.alpha;
tg = source[1] * this.alpha;
tb = source[2] * this.alpha;
for (var i = 0; i < iLen; i += 4) {
r = data[i];
g = data[i + 1];
b = data[i + 2];
switch (this.mode) {
case 'multiply':
data[i] = r * tr / 255;
data[i + 1] = g * tg / 255;
data[i + 2] = b * tb / 255;
break;
case 'screen':
data[i] = 255 - (255 - r) * (255 - tr) / 255;
data[i + 1] = 255 - (255 - g) * (255 - tg) / 255;
data[i + 2] = 255 - (255 - b) * (255 - tb) / 255;
break;
case 'add':
data[i] = r + tr;
data[i + 1] = g + tg;
data[i + 2] = b + tb;
break;
case 'diff':
case 'difference':
data[i] = Math.abs(r - tr);
data[i + 1] = Math.abs(g - tg);
data[i + 2] = Math.abs(b - tb);
break;
case 'subtract':
data[i] = r - tr;
data[i + 1] = g - tg;
data[i + 2] = b - tb;
break;
case 'darken':
data[i] = Math.min(r, tr);
data[i + 1] = Math.min(g, tg);
data[i + 2] = Math.min(b, tb);
break;
case 'lighten':
data[i] = Math.max(r, tr);
data[i + 1] = Math.max(g, tg);
data[i + 2] = Math.max(b, tb);
break;
case 'overlay':
data[i] = tr < 128 ? (2 * r * tr / 255) : (255 - 2 * (255 - r) * (255 - tr) / 255);
data[i + 1] = tg < 128 ? (2 * g * tg / 255) : (255 - 2 * (255 - g) * (255 - tg) / 255);
data[i + 2] = tb < 128 ? (2 * b * tb / 255) : (255 - 2 * (255 - b) * (255 - tb) / 255);
break;
case 'exclusion':
data[i] = tr + r - ((2 * tr * r) / 255);
data[i + 1] = tg + g - ((2 * tg * g) / 255);
data[i + 2] = tb + b - ((2 * tb * b) / 255);
break;
case 'tint':
data[i] = tr + r * alpha1;
data[i + 1] = tg + g * alpha1;
data[i + 2] = tb + b * alpha1;
}
}
},
/**
* Return WebGL uniform locations for this filter's shader.
*
* @param {WebGLRenderingContext} gl The GL canvas context used to compile this filter's shader.
* @param {WebGLShaderProgram} program This filter's compiled shader program.
*/
getUniformLocations: function(gl, program) {
return {
uColor: gl.getUniformLocation(program, 'uColor'),
};
},
/**
* Send data from this filter to its shader program's uniforms.
*
* @param {WebGLRenderingContext} gl The GL canvas context used to compile this filter's shader.
* @param {Object} uniformLocations A map of string uniform names to WebGLUniformLocation objects
*/
sendUniformData: function(gl, uniformLocations) {
var source = new fabric.Color(this.color).getSource();
source[0] = this.alpha * source[0] / 255;
source[1] = this.alpha * source[1] / 255;
source[2] = this.alpha * source[2] / 255;
source[3] = this.alpha;
gl.uniform4fv(uniformLocations.uColor, source);
},
/**
* Returns object representation of an instance
* @return {Object} Object representation of an instance
*/
toObject: function() {
return {
type: this.type,
color: this.color,
mode: this.mode,
alpha: this.alpha
};
}
});
/**
* Returns filter instance from an object representation
* @static
* @param {Object} object Object to create an instance from
* @param {function} [callback] to be invoked after filter creation
* @return {fabric.Image.filters.BlendColor} Instance of fabric.Image.filters.BlendColor
*/
fabric.Image.filters.BlendColor.fromObject = fabric.Image.filters.BaseFilter.fromObject;
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
'use strict';
var fabric = global.fabric,
filters = fabric.Image.filters,
createClass = fabric.util.createClass;
/**
* Image Blend filter class
* @class fabric.Image.filter.BlendImage
* @memberOf fabric.Image.filters
* @extends fabric.Image.filters.BaseFilter
* @example
* var filter = new fabric.Image.filters.BlendColor({
* color: '#000',
* mode: 'multiply'
* });
*
* var filter = new fabric.Image.filters.BlendImage({
* image: fabricImageObject,
* mode: 'multiply',
* alpha: 0.5
* });
* object.filters.push(filter);
* object.applyFilters();
* canvas.renderAll();
*/
filters.BlendImage = createClass(filters.BaseFilter, /** @lends fabric.Image.filters.BlendImage.prototype */ {
type: 'BlendImage',
/**
* Color to make the blend operation with. default to a reddish color since black or white
* gives always strong result.
**/
image: null,
/**
* Blend mode for the filter: one of multiply, add, diff, screen, subtract,
* darken, lighten, overlay, exclusion, tint.
**/
mode: 'multiply',
/**
* alpha value. represent the strength of the blend image operation.
* not implemented.
**/
alpha: 1,
vertexSource: 'attribute vec2 aPosition;\n' +
'varying vec2 vTexCoord;\n' +
'varying vec2 vTexCoord2;\n' +
'uniform mat3 uTransformMatrix;\n' +
'void main() {\n' +
'vTexCoord = aPosition;\n' +
'vTexCoord2 = (uTransformMatrix * vec3(aPosition, 1.0)).xy;\n' +
'gl_Position = vec4(aPosition * 2.0 - 1.0, 0.0, 1.0);\n' +
'}',
/**
* Fragment source for the Multiply program
*/
fragmentSource: {
multiply: 'precision highp float;\n' +
'uniform sampler2D uTexture;\n' +
'uniform sampler2D uImage;\n' +
'uniform vec4 uColor;\n' +
'varying vec2 vTexCoord;\n' +
'varying vec2 vTexCoord2;\n' +
'void main() {\n' +
'vec4 color = texture2D(uTexture, vTexCoord);\n' +
'vec4 color2 = texture2D(uImage, vTexCoord2);\n' +
'color.rgba *= color2.rgba;\n' +
'gl_FragColor = color;\n' +
'}',
mask: 'precision highp float;\n' +
'uniform sampler2D uTexture;\n' +
'uniform sampler2D uImage;\n' +
'uniform vec4 uColor;\n' +
'varying vec2 vTexCoord;\n' +
'varying vec2 vTexCoord2;\n' +
'void main() {\n' +
'vec4 color = texture2D(uTexture, vTexCoord);\n' +
'vec4 color2 = texture2D(uImage, vTexCoord2);\n' +
'color.a = color2.a;\n' +
'gl_FragColor = color;\n' +
'}',
},
/**
* Retrieves the cached shader.
* @param {Object} options
* @param {WebGLRenderingContext} options.context The GL context used for rendering.
* @param {Object} options.programCache A map of compiled shader programs, keyed by filter type.
*/
retrieveShader: function(options) {
var cacheKey = this.type + '_' + this.mode;
var shaderSource = this.fragmentSource[this.mode];
if (!options.programCache.hasOwnProperty(cacheKey)) {
options.programCache[cacheKey] = this.createProgram(options.context, shaderSource);
}
return options.programCache[cacheKey];
},
applyToWebGL: function(options) {
// load texture to blend.
var gl = options.context,
texture = this.createTexture(options.filterBackend, this.image);
this.bindAdditionalTexture(gl, texture, gl.TEXTURE1);
this.callSuper('applyToWebGL', options);
this.unbindAdditionalTexture(gl, gl.TEXTURE1);
},
createTexture: function(backend, image) {
return backend.getCachedTexture(image.cacheKey, image._element);
},
/**
* Calculate a transformMatrix to adapt the image to blend over
* @param {Object} options
* @param {WebGLRenderingContext} options.context The GL context used for rendering.
* @param {Object} options.programCache A map of compiled shader programs, keyed by filter type.
*/
calculateMatrix: function() {
var image = this.image,
width = image._element.width,
height = image._element.height;
return [
1 / image.scaleX, 0, 0,
0, 1 / image.scaleY, 0,
-image.left / width, -image.top / height, 1
];
},
/**
* Apply the Blend operation to a Uint8ClampedArray representing the pixels of an image.
*
* @param {Object} options
* @param {ImageData} options.imageData The Uint8ClampedArray to be filtered.
*/
applyTo2d: function(options) {
var imageData = options.imageData,
resources = options.filterBackend.resources,
data = imageData.data, iLen = data.length,
width = imageData.width,
height = imageData.height,
tr, tg, tb, ta,
r, g, b, a,
canvas1, context, image = this.image, blendData;
if (!resources.blendImage) {
resources.blendImage = fabric.util.createCanvasElement();
}
canvas1 = resources.blendImage;
context = canvas1.getContext('2d');
if (canvas1.width !== width || canvas1.height !== height) {
canvas1.width = width;
canvas1.height = height;
}
else {
context.clearRect(0, 0, width, height);
}
context.setTransform(image.scaleX, 0, 0, image.scaleY, image.left, image.top);
context.drawImage(image._element, 0, 0, width, height);
blendData = context.getImageData(0, 0, width, height).data;
for (var i = 0; i < iLen; i += 4) {
r = data[i];
g = data[i + 1];
b = data[i + 2];
a = data[i + 3];
tr = blendData[i];
tg = blendData[i + 1];
tb = blendData[i + 2];
ta = blendData[i + 3];
switch (this.mode) {
case 'multiply':
data[i] = r * tr / 255;
data[i + 1] = g * tg / 255;
data[i + 2] = b * tb / 255;
data[i + 3] = a * ta / 255;
break;
case 'mask':
data[i + 3] = ta;
break;
}
}
},
/**
* Return WebGL uniform locations for this filter's shader.
*
* @param {WebGLRenderingContext} gl The GL canvas context used to compile this filter's shader.
* @param {WebGLShaderProgram} program This filter's compiled shader program.
*/
getUniformLocations: function(gl, program) {
return {
uTransformMatrix: gl.getUniformLocation(program, 'uTransformMatrix'),
uImage: gl.getUniformLocation(program, 'uImage'),
};
},
/**
* Send data from this filter to its shader program's uniforms.
*
* @param {WebGLRenderingContext} gl The GL canvas context used to compile this filter's shader.
* @param {Object} uniformLocations A map of string uniform names to WebGLUniformLocation objects
*/
sendUniformData: function(gl, uniformLocations) {
var matrix = this.calculateMatrix();
gl.uniform1i(uniformLocations.uImage, 1); // texture unit 1.
gl.uniformMatrix3fv(uniformLocations.uTransformMatrix, false, matrix);
},
/**
* Returns object representation of an instance
* @return {Object} Object representation of an instance
*/
toObject: function() {
return {
type: this.type,
image: this.image && this.image.toObject(),
mode: this.mode,
alpha: this.alpha
};
}
});
/**
* Returns filter instance from an object representation
* @static
* @param {Object} object Object to create an instance from
* @param {function} callback to be invoked after filter creation
* @return {fabric.Image.filters.BlendImage} Instance of fabric.Image.filters.BlendImage
*/
fabric.Image.filters.BlendImage.fromObject = function(object, callback) {
fabric.Image.fromObject(object.image, function(image) {
var options = fabric.util.object.clone(object);
options.image = image;
callback(new fabric.Image.filters.BlendImage(options));
});
};
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
'use strict';
var fabric = global.fabric || (global.fabric = { }), pow = Math.pow, floor = Math.floor,
sqrt = Math.sqrt, abs = Math.abs, round = Math.round, sin = Math.sin,
ceil = Math.ceil,
filters = fabric.Image.filters,
createClass = fabric.util.createClass;
/**
* Resize image filter class
* @class fabric.Image.filters.Resize
* @memberOf fabric.Image.filters
* @extends fabric.Image.filters.BaseFilter
* @see {@link http://fabricjs.com/image-filters|ImageFilters demo}
* @example
* var filter = new fabric.Image.filters.Resize();
* object.filters.push(filter);
* object.applyFilters(canvas.renderAll.bind(canvas));
*/
filters.Resize = createClass(filters.BaseFilter, /** @lends fabric.Image.filters.Resize.prototype */ {
/**
* Filter type
* @param {String} type
* @default
*/
type: 'Resize',
/**
* Resize type
* for webgl resizeType is just lanczos, for canvas2d can be:
* bilinear, hermite, sliceHack, lanczos.
* @param {String} resizeType
* @default
*/
resizeType: 'hermite',
/**
* Scale factor for resizing, x axis
* @param {Number} scaleX
* @default
*/
scaleX: 1,
/**
* Scale factor for resizing, y axis
* @param {Number} scaleY
* @default
*/
scaleY: 1,
/**
* LanczosLobes parameter for lanczos filter, valid for resizeType lanczos
* @param {Number} lanczosLobes
* @default
*/
lanczosLobes: 3,
/**
* Return WebGL uniform locations for this filter's shader.
*
* @param {WebGLRenderingContext} gl The GL canvas context used to compile this filter's shader.
* @param {WebGLShaderProgram} program This filter's compiled shader program.
*/
getUniformLocations: function(gl, program) {
return {
uDelta: gl.getUniformLocation(program, 'uDelta'),
uTaps: gl.getUniformLocation(program, 'uTaps'),
};
},
/**
* Send data from this filter to its shader program's uniforms.
*
* @param {WebGLRenderingContext} gl The GL canvas context used to compile this filter's shader.
* @param {Object} uniformLocations A map of string uniform names to WebGLUniformLocation objects
*/
sendUniformData: function(gl, uniformLocations) {
gl.uniform2fv(uniformLocations.uDelta, this.horizontal ? [1 / this.width, 0] : [0, 1 / this.height]);
gl.uniform1fv(uniformLocations.uTaps, this.taps);
},
/**
* Retrieves the cached shader.
* @param {Object} options
* @param {WebGLRenderingContext} options.context The GL context used for rendering.
* @param {Object} options.programCache A map of compiled shader programs, keyed by filter type.
*/
retrieveShader: function(options) {
var filterWindow = this.getFilterWindow(), cacheKey = this.type + '_' + filterWindow;
if (!options.programCache.hasOwnProperty(cacheKey)) {
var fragmentShader = this.generateShader(filterWindow);
options.programCache[cacheKey] = this.createProgram(options.context, fragmentShader);
}
return options.programCache[cacheKey];
},
getFilterWindow: function() {
var scale = this.tempScale;
return Math.ceil(this.lanczosLobes / scale);
},
getTaps: function() {
var lobeFunction = this.lanczosCreate(this.lanczosLobes), scale = this.tempScale,
filterWindow = this.getFilterWindow(), taps = new Array(filterWindow);
for (var i = 1; i <= filterWindow; i++) {
taps[i - 1] = lobeFunction(i * scale);
}
return taps;
},
/**
* Generate vertex and shader sources from the necessary steps numbers
* @param {Number} filterWindow
*/
generateShader: function(filterWindow) {
var offsets = new Array(filterWindow),
fragmentShader = this.fragmentSourceTOP, filterWindow;
for (var i = 1; i <= filterWindow; i++) {
offsets[i - 1] = i + '.0 * uDelta';
}
fragmentShader += 'uniform float uTaps[' + filterWindow + '];\n';
fragmentShader += 'void main() {\n';
fragmentShader += ' vec4 color = texture2D(uTexture, vTexCoord);\n';
fragmentShader += ' float sum = 1.0;\n';
offsets.forEach(function(offset, i) {
fragmentShader += ' color += texture2D(uTexture, vTexCoord + ' + offset + ') * uTaps[' + i + '];\n';
fragmentShader += ' color += texture2D(uTexture, vTexCoord - ' + offset + ') * uTaps[' + i + '];\n';
fragmentShader += ' sum += 2.0 * uTaps[' + i + '];\n';
});
fragmentShader += ' gl_FragColor = color / sum;\n';
fragmentShader += '}';
return fragmentShader;
},
fragmentSourceTOP: 'precision highp float;\n' +
'uniform sampler2D uTexture;\n' +
'uniform vec2 uDelta;\n' +
'varying vec2 vTexCoord;\n',
/**
* Apply the resize filter to the image
* Determines whether to use WebGL or Canvas2D based on the options.webgl flag.
*
* @param {Object} options
* @param {Number} options.passes The number of filters remaining to be executed
* @param {Boolean} options.webgl Whether to use webgl to render the filter.
* @param {WebGLTexture} options.sourceTexture The texture setup as the source to be filtered.
* @param {WebGLTexture} options.targetTexture The texture where filtered output should be drawn.
* @param {WebGLRenderingContext} options.context The GL context used for rendering.
* @param {Object} options.programCache A map of compiled shader programs, keyed by filter type.
*/
applyTo: function(options) {
if (options.webgl) {
options.passes++;
this.width = options.sourceWidth;
this.horizontal = true;
this.dW = Math.round(this.width * this.scaleX);
this.dH = options.sourceHeight;
this.tempScale = this.dW / this.width;
this.taps = this.getTaps();
options.destinationWidth = this.dW;
this._setupFrameBuffer(options);
this.applyToWebGL(options);
this._swapTextures(options);
options.sourceWidth = options.destinationWidth;
this.height = options.sourceHeight;
this.horizontal = false;
this.dH = Math.round(this.height * this.scaleY);
this.tempScale = this.dH / this.height;
this.taps = this.getTaps();
options.destinationHeight = this.dH;
this._setupFrameBuffer(options);
this.applyToWebGL(options);
this._swapTextures(options);
options.sourceHeight = options.destinationHeight;
}
else {
this.applyTo2d(options);
}
},
isNeutralState: function() {
return this.scaleX === 1 && this.scaleY === 1;
},
lanczosCreate: function(lobes) {
return function(x) {
if (x >= lobes || x <= -lobes) {
return 0.0;
}
if (x < 1.19209290E-07 && x > -1.19209290E-07) {
return 1.0;
}
x *= Math.PI;
var xx = x / lobes;
return (sin(x) / x) * sin(xx) / xx;
};
},
/**
* Applies filter to canvas element
* @memberOf fabric.Image.filters.Resize.prototype
* @param {Object} canvasEl Canvas element to apply filter to
* @param {Number} scaleX
* @param {Number} scaleY
*/
applyTo2d: function(options) {
var imageData = options.imageData,
scaleX = this.scaleX,
scaleY = this.scaleY;
this.rcpScaleX = 1 / scaleX;
this.rcpScaleY = 1 / scaleY;
var oW = imageData.width, oH = imageData.height,
dW = round(oW * scaleX), dH = round(oH * scaleY),
newData;
if (this.resizeType === 'sliceHack') {
newData = this.sliceByTwo(options, oW, oH, dW, dH);
}
else if (this.resizeType === 'hermite') {
newData = this.hermiteFastResize(options, oW, oH, dW, dH);
}
else if (this.resizeType === 'bilinear') {
newData = this.bilinearFiltering(options, oW, oH, dW, dH);
}
else if (this.resizeType === 'lanczos') {
newData = this.lanczosResize(options, oW, oH, dW, dH);
}
options.imageData = newData;
},
/**
* Filter sliceByTwo
* @param {Object} canvasEl Canvas element to apply filter to
* @param {Number} oW Original Width
* @param {Number} oH Original Height
* @param {Number} dW Destination Width
* @param {Number} dH Destination Height
* @returns {ImageData}
*/
sliceByTwo: function(options, oW, oH, dW, dH) {
var imageData = options.imageData,
mult = 0.5, doneW = false, doneH = false, stepW = oW * mult,
stepH = oH * mult, resources = fabric.filterBackend.resources,
tmpCanvas, ctx, sX = 0, sY = 0, dX = oW, dY = 0;
if (!resources.sliceByTwo) {
resources.sliceByTwo = document.createElement('canvas');
}
tmpCanvas = resources.sliceByTwo;
if (tmpCanvas.width < oW * 1.5 || tmpCanvas.height < oH) {
tmpCanvas.width = oW * 1.5;
tmpCanvas.height = oH;
}
ctx = tmpCanvas.getContext('2d');
ctx.clearRect(0, 0, oW * 1.5, oH);
ctx.putImageData(imageData, 0, 0);
dW = floor(dW);
dH = floor(dH);
while (!doneW || !doneH) {
oW = stepW;
oH = stepH;
if (dW < floor(stepW * mult)) {
stepW = floor(stepW * mult);
}
else {
stepW = dW;
doneW = true;
}
if (dH < floor(stepH * mult)) {
stepH = floor(stepH * mult);
}
else {
stepH = dH;
doneH = true;
}
ctx.drawImage(tmpCanvas, sX, sY, oW, oH, dX, dY, stepW, stepH);
sX = dX;
sY = dY;
dY += stepH;
}
return ctx.getImageData(sX, sY, dW, dH);
},
/**
* Filter lanczosResize
* @param {Object} canvasEl Canvas element to apply filter to
* @param {Number} oW Original Width
* @param {Number} oH Original Height
* @param {Number} dW Destination Width
* @param {Number} dH Destination Height
* @returns {ImageData}
*/
lanczosResize: function(options, oW, oH, dW, dH) {
function process(u) {
var v, i, weight, idx, a, red, green,
blue, alpha, fX, fY;
center.x = (u + 0.5) * ratioX;
icenter.x = floor(center.x);
for (v = 0; v < dH; v++) {
center.y = (v + 0.5) * ratioY;
icenter.y = floor(center.y);
a = 0; red = 0; green = 0; blue = 0; alpha = 0;
for (i = icenter.x - range2X; i <= icenter.x + range2X; i++) {
if (i < 0 || i >= oW) {
continue;
}
fX = floor(1000 * abs(i - center.x));
if (!cacheLanc[fX]) {
cacheLanc[fX] = { };
}
for (var j = icenter.y - range2Y; j <= icenter.y + range2Y; j++) {
if (j < 0 || j >= oH) {
continue;
}
fY = floor(1000 * abs(j - center.y));
if (!cacheLanc[fX][fY]) {
cacheLanc[fX][fY] = lanczos(sqrt(pow(fX * rcpRatioX, 2) + pow(fY * rcpRatioY, 2)) / 1000);
}
weight = cacheLanc[fX][fY];
if (weight > 0) {
idx = (j * oW + i) * 4;
a += weight;
red += weight * srcData[idx];
green += weight * srcData[idx + 1];
blue += weight * srcData[idx + 2];
alpha += weight * srcData[idx + 3];
}
}
}
idx = (v * dW + u) * 4;
destData[idx] = red / a;
destData[idx + 1] = green / a;
destData[idx + 2] = blue / a;
destData[idx + 3] = alpha / a;
}
if (++u < dW) {
return process(u);
}
else {
return destImg;
}
}
var srcData = options.imageData.data,
destImg = options.ctx.createImageData(dW, dH),
destData = destImg.data,
lanczos = this.lanczosCreate(this.lanczosLobes),
ratioX = this.rcpScaleX, ratioY = this.rcpScaleY,
rcpRatioX = 2 / this.rcpScaleX, rcpRatioY = 2 / this.rcpScaleY,
range2X = ceil(ratioX * this.lanczosLobes / 2),
range2Y = ceil(ratioY * this.lanczosLobes / 2),
cacheLanc = { }, center = { }, icenter = { };
return process(0);
},
/**
* bilinearFiltering
* @param {Object} canvasEl Canvas element to apply filter to
* @param {Number} oW Original Width
* @param {Number} oH Original Height
* @param {Number} dW Destination Width
* @param {Number} dH Destination Height
* @returns {ImageData}
*/
bilinearFiltering: function(options, oW, oH, dW, dH) {
var a, b, c, d, x, y, i, j, xDiff, yDiff, chnl,
color, offset = 0, origPix, ratioX = this.rcpScaleX,
ratioY = this.rcpScaleY,
w4 = 4 * (oW - 1), img = options.imageData,
pixels = img.data, destImage = options.ctx.createImageData(dW, dH),
destPixels = destImage.data;
for (i = 0; i < dH; i++) {
for (j = 0; j < dW; j++) {
x = floor(ratioX * j);
y = floor(ratioY * i);
xDiff = ratioX * j - x;
yDiff = ratioY * i - y;
origPix = 4 * (y * oW + x);
for (chnl = 0; chnl < 4; chnl++) {
a = pixels[origPix + chnl];
b = pixels[origPix + 4 + chnl];
c = pixels[origPix + w4 + chnl];
d = pixels[origPix + w4 + 4 + chnl];
color = a * (1 - xDiff) * (1 - yDiff) + b * xDiff * (1 - yDiff) +
c * yDiff * (1 - xDiff) + d * xDiff * yDiff;
destPixels[offset++] = color;
}
}
}
return destImage;
},
/**
* hermiteFastResize
* @param {Object} canvasEl Canvas element to apply filter to
* @param {Number} oW Original Width
* @param {Number} oH Original Height
* @param {Number} dW Destination Width
* @param {Number} dH Destination Height
* @returns {ImageData}
*/
hermiteFastResize: function(options, oW, oH, dW, dH) {
var ratioW = this.rcpScaleX, ratioH = this.rcpScaleY,
ratioWHalf = ceil(ratioW / 2),
ratioHHalf = ceil(ratioH / 2),
img = options.imageData, data = img.data,
img2 = options.ctx.createImageData(dW, dH), data2 = img2.data;
for (var j = 0; j < dH; j++) {
for (var i = 0; i < dW; i++) {
var x2 = (i + j * dW) * 4, weight = 0, weights = 0, weightsAlpha = 0,
gxR = 0, gxG = 0, gxB = 0, gxA = 0, centerY = (j + 0.5) * ratioH;
for (var yy = floor(j * ratioH); yy < (j + 1) * ratioH; yy++) {
var dy = abs(centerY - (yy + 0.5)) / ratioHHalf,
centerX = (i + 0.5) * ratioW, w0 = dy * dy;
for (var xx = floor(i * ratioW); xx < (i + 1) * ratioW; xx++) {
var dx = abs(centerX - (xx + 0.5)) / ratioWHalf,
w = sqrt(w0 + dx * dx);
/* eslint-disable max-depth */
if (w > 1 && w < -1) {
continue;
}
//hermite filter
weight = 2 * w * w * w - 3 * w * w + 1;
if (weight > 0) {
dx = 4 * (xx + yy * oW);
//alpha
gxA += weight * data[dx + 3];
weightsAlpha += weight;
//colors
if (data[dx + 3] < 255) {
weight = weight * data[dx + 3] / 250;
}
gxR += weight * data[dx];
gxG += weight * data[dx + 1];
gxB += weight * data[dx + 2];
weights += weight;
}
/* eslint-enable max-depth */
}
}
data2[x2] = gxR / weights;
data2[x2 + 1] = gxG / weights;
data2[x2 + 2] = gxB / weights;
data2[x2 + 3] = gxA / weightsAlpha;
}
}
return img2;
},
/**
* Returns object representation of an instance
* @return {Object} Object representation of an instance
*/
toObject: function() {
return {
type: this.type,
scaleX: this.scaleX,
scaleY: this.scaleY,
resizeType: this.resizeType,
lanczosLobes: this.lanczosLobes
};
}
});
/**
* Returns filter instance from an object representation
* @static
* @param {Object} object Object to create an instance from
* @param {Function} [callback] to be invoked after filter creation
* @return {fabric.Image.filters.Resize} Instance of fabric.Image.filters.Resize
*/
fabric.Image.filters.Resize.fromObject = fabric.Image.filters.BaseFilter.fromObject;
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
'use strict';
var fabric = global.fabric || (global.fabric = { }),
filters = fabric.Image.filters,
createClass = fabric.util.createClass;
/**
* Contrast filter class
* @class fabric.Image.filters.Contrast
* @memberOf fabric.Image.filters
* @extends fabric.Image.filters.BaseFilter
* @see {@link fabric.Image.filters.Contrast#initialize} for constructor definition
* @see {@link http://fabricjs.com/image-filters|ImageFilters demo}
* @example
* var filter = new fabric.Image.filters.Contrast({
* contrast: 40
* });
* object.filters.push(filter);
* object.applyFilters();
*/
filters.Contrast = createClass(filters.BaseFilter, /** @lends fabric.Image.filters.Contrast.prototype */ {
/**
* Filter type
* @param {String} type
* @default
*/
type: 'Contrast',
fragmentSource: 'precision highp float;\n' +
'uniform sampler2D uTexture;\n' +
'uniform float uContrast;\n' +
'varying vec2 vTexCoord;\n' +
'void main() {\n' +
'vec4 color = texture2D(uTexture, vTexCoord);\n' +
'float contrastF = 1.015 * (uContrast + 1.0) / (1.0 * (1.015 - uContrast));\n' +
'color.rgb = contrastF * (color.rgb - 0.5) + 0.5;\n' +
'gl_FragColor = color;\n' +
'}',
contrast: 0,
mainParameter: 'contrast',
/**
* Constructor
* @memberOf fabric.Image.filters.Contrast.prototype
* @param {Object} [options] Options object
* @param {Number} [options.contrast=0] Value to contrast the image up (-1...1)
*/
/**
* Apply the Contrast operation to a Uint8Array representing the pixels of an image.
*
* @param {Object} options
* @param {ImageData} options.imageData The Uint8Array to be filtered.
*/
applyTo2d: function(options) {
if (this.contrast === 0) {
return;
}
var imageData = options.imageData, i, len,
data = imageData.data, len = data.length,
contrast = Math.floor(this.contrast * 255),
contrastF = 259 * (contrast + 255) / (255 * (259 - contrast));
for (i = 0; i < len; i += 4) {
data[i] = contrastF * (data[i] - 128) + 128;
data[i + 1] = contrastF * (data[i + 1] - 128) + 128;
data[i + 2] = contrastF * (data[i + 2] - 128) + 128;
}
},
/**
* Return WebGL uniform locations for this filter's shader.
*
* @param {WebGLRenderingContext} gl The GL canvas context used to compile this filter's shader.
* @param {WebGLShaderProgram} program This filter's compiled shader program.
*/
getUniformLocations: function(gl, program) {
return {
uContrast: gl.getUniformLocation(program, 'uContrast'),
};
},
/**
* Send data from this filter to its shader program's uniforms.
*
* @param {WebGLRenderingContext} gl The GL canvas context used to compile this filter's shader.
* @param {Object} uniformLocations A map of string uniform names to WebGLUniformLocation objects
*/
sendUniformData: function(gl, uniformLocations) {
gl.uniform1f(uniformLocations.uContrast, this.contrast);
},
});
/**
* Returns filter instance from an object representation
* @static
* @param {Object} object Object to create an instance from
* @param {function} [callback] to be invoked after filter creation
* @return {fabric.Image.filters.Contrast} Instance of fabric.Image.filters.Contrast
*/
fabric.Image.filters.Contrast.fromObject = fabric.Image.filters.BaseFilter.fromObject;
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
'use strict';
var fabric = global.fabric || (global.fabric = { }),
filters = fabric.Image.filters,
createClass = fabric.util.createClass;
/**
* Saturate filter class
* @class fabric.Image.filters.Saturation
* @memberOf fabric.Image.filters
* @extends fabric.Image.filters.BaseFilter
* @see {@link fabric.Image.filters.Saturation#initialize} for constructor definition
* @see {@link http://fabricjs.com/image-filters|ImageFilters demo}
* @example
* var filter = new fabric.Image.filters.Saturation({
* saturation: 100
* });
* object.filters.push(filter);
* object.applyFilters();
*/
filters.Saturation = createClass(filters.BaseFilter, /** @lends fabric.Image.filters.Saturation.prototype */ {
/**
* Filter type
* @param {String} type
* @default
*/
type: 'Saturation',
fragmentSource: 'precision highp float;\n' +
'uniform sampler2D uTexture;\n' +
'uniform float uSaturation;\n' +
'varying vec2 vTexCoord;\n' +
'void main() {\n' +
'vec4 color = texture2D(uTexture, vTexCoord);\n' +
'float rgMax = max(color.r, color.g);\n' +
'float rgbMax = max(rgMax, color.b);\n' +
'color.r += rgbMax != color.r ? (rgbMax - color.r) * uSaturation : 0.00;\n' +
'color.g += rgbMax != color.g ? (rgbMax - color.g) * uSaturation : 0.00;\n' +
'color.b += rgbMax != color.b ? (rgbMax - color.b) * uSaturation : 0.00;\n' +
'gl_FragColor = color;\n' +
'}',
saturation: 0,
mainParameter: 'saturation',
/**
* Constructor
* @memberOf fabric.Image.filters.Saturate.prototype
* @param {Object} [options] Options object
* @param {Number} [options.saturate=0] Value to saturate the image (-1...1)
*/
/**
* Apply the Saturation operation to a Uint8ClampedArray representing the pixels of an image.
*
* @param {Object} options
* @param {ImageData} options.imageData The Uint8ClampedArray to be filtered.
*/
applyTo2d: function(options) {
if (this.saturation === 0) {
return;
}
var imageData = options.imageData,
data = imageData.data, len = data.length,
adjust = -this.saturation, i, max;
for (i = 0; i < len; i += 4) {
max = Math.max(data[i], data[i + 1], data[i + 2]);
data[i] += max !== data[i] ? (max - data[i]) * adjust : 0;
data[i + 1] += max !== data[i + 1] ? (max - data[i + 1]) * adjust : 0;
data[i + 2] += max !== data[i + 2] ? (max - data[i + 2]) * adjust : 0;
}
},
/**
* Return WebGL uniform locations for this filter's shader.
*
* @param {WebGLRenderingContext} gl The GL canvas context used to compile this filter's shader.
* @param {WebGLShaderProgram} program This filter's compiled shader program.
*/
getUniformLocations: function(gl, program) {
return {
uSaturation: gl.getUniformLocation(program, 'uSaturation'),
};
},
/**
* Send data from this filter to its shader program's uniforms.
*
* @param {WebGLRenderingContext} gl The GL canvas context used to compile this filter's shader.
* @param {Object} uniformLocations A map of string uniform names to WebGLUniformLocation objects
*/
sendUniformData: function(gl, uniformLocations) {
gl.uniform1f(uniformLocations.uSaturation, -this.saturation);
},
});
/**
* Returns filter instance from an object representation
* @static
* @param {Object} object Object to create an instance from
* @param {Function} [callback] to be invoked after filter creation
* @return {fabric.Image.filters.Saturation} Instance of fabric.Image.filters.Saturate
*/
fabric.Image.filters.Saturation.fromObject = fabric.Image.filters.BaseFilter.fromObject;
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
'use strict';
var fabric = global.fabric || (global.fabric = { }),
filters = fabric.Image.filters,
createClass = fabric.util.createClass;
/**
* Blur filter class
* @class fabric.Image.filters.Blur
* @memberOf fabric.Image.filters
* @extends fabric.Image.filters.BaseFilter
* @see {@link fabric.Image.filters.Blur#initialize} for constructor definition
* @see {@link http://fabricjs.com/image-filters|ImageFilters demo}
* @example
* var filter = new fabric.Image.filters.Blur({
* blur: 0.5
* });
* object.filters.push(filter);
* object.applyFilters();
* canvas.renderAll();
*/
filters.Blur = createClass(filters.BaseFilter, /** @lends fabric.Image.filters.Blur.prototype */ {
type: 'Blur',
/*
'gl_FragColor = vec4(0.0);',
'gl_FragColor += texture2D(texture, vTexCoord + -7 * uDelta)*0.0044299121055113265;',
'gl_FragColor += texture2D(texture, vTexCoord + -6 * uDelta)*0.00895781211794;',
'gl_FragColor += texture2D(texture, vTexCoord + -5 * uDelta)*0.0215963866053;',
'gl_FragColor += texture2D(texture, vTexCoord + -4 * uDelta)*0.0443683338718;',
'gl_FragColor += texture2D(texture, vTexCoord + -3 * uDelta)*0.0776744219933;',
'gl_FragColor += texture2D(texture, vTexCoord + -2 * uDelta)*0.115876621105;',
'gl_FragColor += texture2D(texture, vTexCoord + -1 * uDelta)*0.147308056121;',
'gl_FragColor += texture2D(texture, vTexCoord )*0.159576912161;',
'gl_FragColor += texture2D(texture, vTexCoord + 1 * uDelta)*0.147308056121;',
'gl_FragColor += texture2D(texture, vTexCoord + 2 * uDelta)*0.115876621105;',
'gl_FragColor += texture2D(texture, vTexCoord + 3 * uDelta)*0.0776744219933;',
'gl_FragColor += texture2D(texture, vTexCoord + 4 * uDelta)*0.0443683338718;',
'gl_FragColor += texture2D(texture, vTexCoord + 5 * uDelta)*0.0215963866053;',
'gl_FragColor += texture2D(texture, vTexCoord + 6 * uDelta)*0.00895781211794;',
'gl_FragColor += texture2D(texture, vTexCoord + 7 * uDelta)*0.0044299121055113265;',
*/
/* eslint-disable max-len */
fragmentSource: 'precision highp float;\n' +
'uniform sampler2D uTexture;\n' +
'uniform vec2 uDelta;\n' +
'varying vec2 vTexCoord;\n' +
'const float nSamples = 15.0;\n' +
'vec3 v3offset = vec3(12.9898, 78.233, 151.7182);\n' +
'float random(vec3 scale) {\n' +
/* use the fragment position for a different seed per-pixel */
'return fract(sin(dot(gl_FragCoord.xyz, scale)) * 43758.5453);\n' +
'}\n' +
'void main() {\n' +
'vec4 color = vec4(0.0);\n' +
'float total = 0.0;\n' +
'float offset = random(v3offset);\n' +
'for (float t = -nSamples; t <= nSamples; t++) {\n' +
'float percent = (t + offset - 0.5) / nSamples;\n' +
'float weight = 1.0 - abs(percent);\n' +
'color += texture2D(uTexture, vTexCoord + uDelta * percent) * weight;\n' +
'total += weight;\n' +
'}\n' +
'gl_FragColor = color / total;\n' +
'}',
/* eslint-enable max-len */
/**
* blur value, in percentage of image dimensions.
* specific to keep the image blur constant at different resolutions
* range bewteen 0 and 1.
*/
blur: 0,
mainParameter: 'blur',
applyTo: function(options) {
if (options.webgl) {
// this aspectRatio is used to give the same blur to vertical and horizontal
this.aspectRatio = options.sourceWidth / options.sourceHeight;
options.passes++;
this._setupFrameBuffer(options);
this.horizontal = true;
this.applyToWebGL(options);
this._swapTextures(options);
this._setupFrameBuffer(options);
this.horizontal = false;
this.applyToWebGL(options);
this._swapTextures(options);
}
else {
this.applyTo2d(options);
}
},
applyTo2d: function(options) {
// paint canvasEl with current image data.
//options.ctx.putImageData(options.imageData, 0, 0);
options.imageData = this.simpleBlur(options);
},
simpleBlur: function(options) {
var resources = options.filterBackend.resources, canvas1, canvas2,
width = options.imageData.width,
height = options.imageData.height;
if (!resources.blurLayer1) {
resources.blurLayer1 = fabric.util.createCanvasElement();
resources.blurLayer2 = fabric.util.createCanvasElement();
}
canvas1 = resources.blurLayer1;
canvas2 = resources.blurLayer2;
if (canvas1.width !== width || canvas1.height !== height) {
canvas2.width = canvas1.width = width;
canvas2.height = canvas1.height = height;
}
var ctx1 = canvas1.getContext('2d'),
ctx2 = canvas2.getContext('2d'),
nSamples = 15,
random, percent, j, i,
blur = this.blur * 0.06 * 0.5;
// load first canvas
ctx1.putImageData(options.imageData, 0, 0);
ctx2.clearRect(0, 0, width, height);
for (i = -nSamples; i <= nSamples; i++) {
random = (Math.random() - 0.5) / 4;
percent = i / nSamples;
j = blur * percent * width + random;
ctx2.globalAlpha = 1 - Math.abs(percent);
ctx2.drawImage(canvas1, j, random);
ctx1.drawImage(canvas2, 0, 0);
ctx2.globalAlpha = 1;
ctx2.clearRect(0, 0, canvas2.width, canvas2.height);
}
for (i = -nSamples; i <= nSamples; i++) {
random = (Math.random() - 0.5) / 4;
percent = i / nSamples;
j = blur * percent * height + random;
ctx2.globalAlpha = 1 - Math.abs(percent);
ctx2.drawImage(canvas1, random, j);
ctx1.drawImage(canvas2, 0, 0);
ctx2.globalAlpha = 1;
ctx2.clearRect(0, 0, canvas2.width, canvas2.height);
}
options.ctx.drawImage(canvas1, 0, 0);
var newImageData = options.ctx.getImageData(0, 0, canvas1.width, canvas1.height);
ctx1.globalAlpha = 1;
ctx1.clearRect(0, 0, canvas1.width, canvas1.height);
return newImageData;
},
/**
* Return WebGL uniform locations for this filter's shader.
*
* @param {WebGLRenderingContext} gl The GL canvas context used to compile this filter's shader.
* @param {WebGLShaderProgram} program This filter's compiled shader program.
*/
getUniformLocations: function(gl, program) {
return {
delta: gl.getUniformLocation(program, 'uDelta'),
};
},
/**
* Send data from this filter to its shader program's uniforms.
*
* @param {WebGLRenderingContext} gl The GL canvas context used to compile this filter's shader.
* @param {Object} uniformLocations A map of string uniform names to WebGLUniformLocation objects
*/
sendUniformData: function(gl, uniformLocations) {
var delta = this.chooseRightDelta();
gl.uniform2fv(uniformLocations.delta, delta);
},
/**
* choose right value of image percentage to blur with
* @returns {Array} a numeric array with delta values
*/
chooseRightDelta: function() {
var blurScale = 1, delta = [0, 0], blur;
if (this.horizontal) {
if (this.aspectRatio > 1) {
// image is wide, i want to shrink radius horizontal
blurScale = 1 / this.aspectRatio;
}
}
else {
if (this.aspectRatio < 1) {
// image is tall, i want to shrink radius vertical
blurScale = this.aspectRatio;
}
}
blur = blurScale * this.blur * 0.12;
if (this.horizontal) {
delta[0] = blur;
}
else {
delta[1] = blur;
}
return delta;
},
});
/**
* Deserialize a JSON definition of a BlurFilter into a concrete instance.
*/
filters.Blur.fromObject = fabric.Image.filters.BaseFilter.fromObject;
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
'use strict';
var fabric = global.fabric || (global.fabric = { }),
filters = fabric.Image.filters,
createClass = fabric.util.createClass;
/**
* Gamma filter class
* @class fabric.Image.filters.Gamma
* @memberOf fabric.Image.filters
* @extends fabric.Image.filters.BaseFilter
* @see {@link fabric.Image.filters.Gamma#initialize} for constructor definition
* @see {@link http://fabricjs.com/image-filters|ImageFilters demo}
* @example
* var filter = new fabric.Image.filters.Gamma({
* brightness: 200
* });
* object.filters.push(filter);
* object.applyFilters();
*/
filters.Gamma = createClass(filters.BaseFilter, /** @lends fabric.Image.filters.Gamma.prototype */ {
/**
* Filter type
* @param {String} type
* @default
*/
type: 'Gamma',
fragmentSource: 'precision highp float;\n' +
'uniform sampler2D uTexture;\n' +
'uniform vec3 uGamma;\n' +
'varying vec2 vTexCoord;\n' +
'void main() {\n' +
'vec4 color = texture2D(uTexture, vTexCoord);\n' +
'vec3 correction = (1.0 / uGamma);\n' +
'color.r = pow(color.r, correction.r);\n' +
'color.g = pow(color.g, correction.g);\n' +
'color.b = pow(color.b, correction.b);\n' +
'gl_FragColor = color;\n' +
'gl_FragColor.rgb *= color.a;\n' +
'}',
/**
* Gamma array value, from 0.01 to 2.2.
* @param {Array} gamma
* @default
*/
gamma: [1, 1, 1],
/**
* Describe the property that is the filter parameter
* @param {String} m
* @default
*/
mainParameter: 'gamma',
/**
* Constructor
* @param {Object} [options] Options object
*/
initialize: function(options) {
this.gamma = [1, 1, 1];
filters.BaseFilter.prototype.initialize.call(this, options);
},
/**
* Apply the Gamma operation to a Uint8Array representing the pixels of an image.
*
* @param {Object} options
* @param {ImageData} options.imageData The Uint8Array to be filtered.
*/
applyTo2d: function(options) {
var imageData = options.imageData, data = imageData.data,
gamma = this.gamma, len = data.length,
rInv = 1 / gamma[0], gInv = 1 / gamma[1],
bInv = 1 / gamma[2], i;
if (!this.rVals) {
// eslint-disable-next-line
this.rVals = new Uint8Array(256);
// eslint-disable-next-line
this.gVals = new Uint8Array(256);
// eslint-disable-next-line
this.bVals = new Uint8Array(256);
}
// This is an optimization - pre-compute a look-up table for each color channel
// instead of performing these pow calls for each pixel in the image.
for (i = 0, len = 256; i < len; i++) {
this.rVals[i] = Math.pow(i / 255, rInv) * 255;
this.gVals[i] = Math.pow(i / 255, gInv) * 255;
this.bVals[i] = Math.pow(i / 255, bInv) * 255;
}
for (i = 0, len = data.length; i < len; i += 4) {
data[i] = this.rVals[data[i]];
data[i + 1] = this.gVals[data[i + 1]];
data[i + 2] = this.bVals[data[i + 2]];
}
},
/**
* Return WebGL uniform locations for this filter's shader.
*
* @param {WebGLRenderingContext} gl The GL canvas context used to compile this filter's shader.
* @param {WebGLShaderProgram} program This filter's compiled shader program.
*/
getUniformLocations: function(gl, program) {
return {
uGamma: gl.getUniformLocation(program, 'uGamma'),
};
},
/**
* Send data from this filter to its shader program's uniforms.
*
* @param {WebGLRenderingContext} gl The GL canvas context used to compile this filter's shader.
* @param {Object} uniformLocations A map of string uniform names to WebGLUniformLocation objects
*/
sendUniformData: function(gl, uniformLocations) {
gl.uniform3fv(uniformLocations.uGamma, this.gamma);
},
});
/**
* Returns filter instance from an object representation
* @static
* @param {Object} object Object to create an instance from
* @param {function} [callback] to be invoked after filter creation
* @return {fabric.Image.filters.Gamma} Instance of fabric.Image.filters.Gamma
*/
fabric.Image.filters.Gamma.fromObject = fabric.Image.filters.BaseFilter.fromObject;
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
'use strict';
var fabric = global.fabric || (global.fabric = { }),
filters = fabric.Image.filters,
createClass = fabric.util.createClass;
/**
* A container class that knows how to apply a sequence of filters to an input image.
*/
filters.Composed = createClass(filters.BaseFilter, /** @lends fabric.Image.filters.Composed.prototype */ {
type: 'Composed',
/**
* A non sparse array of filters to apply
*/
subFilters: [],
/**
* Constructor
* @param {Object} [options] Options object
*/
initialize: function(options) {
this.callSuper('initialize', options);
// create a new array instead mutating the prototype with push
this.subFilters = this.subFilters.slice(0);
},
/**
* Apply this container's filters to the input image provided.
*
* @param {Object} options
* @param {Number} options.passes The number of filters remaining to be applied.
*/
applyTo: function(options) {
options.passes += this.subFilters.length - 1;
this.subFilters.forEach(function(filter) {
filter.applyTo(options);
});
},
/**
* Serialize this filter into JSON.
*
* @returns {Object} A JSON representation of this filter.
*/
toObject: function() {
return fabric.util.object.extend(this.callSuper('toObject'), {
subFilters: this.subFilters.map(function(filter) { return filter.toObject(); }),
});
},
isNeutralState: function() {
return !this.subFilters.some(function(filter) { return !filter.isNeutralState(); });
}
});
/**
* Deserialize a JSON definition of a ComposedFilter into a concrete instance.
*/
fabric.Image.filters.Composed.fromObject = function(object, callback) {
var filters = object.subFilters || [],
subFilters = filters.map(function(filter) {
return new fabric.Image.filters[filter.type](filter);
}),
instance = new fabric.Image.filters.Composed({ subFilters: subFilters });
callback && callback(instance);
return instance;
};
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
'use strict';
var fabric = global.fabric || (global.fabric = { }),
filters = fabric.Image.filters,
createClass = fabric.util.createClass;
/**
* HueRotation filter class
* @class fabric.Image.filters.HueRotation
* @memberOf fabric.Image.filters
* @extends fabric.Image.filters.BaseFilter
* @see {@link fabric.Image.filters.HueRotation#initialize} for constructor definition
* @see {@link http://fabricjs.com/image-filters|ImageFilters demo}
* @example
* var filter = new fabric.Image.filters.HueRotation({
* rotation: -0.5
* });
* object.filters.push(filter);
* object.applyFilters();
*/
filters.HueRotation = createClass(filters.ColorMatrix, /** @lends fabric.Image.filters.HueRotation.prototype */ {
/**
* Filter type
* @param {String} type
* @default
*/
type: 'HueRotation',
/**
* HueRotation value, from -1 to 1.
* the unit is radians
* @param {Number} myParameter
* @default
*/
rotation: 0,
/**
* Describe the property that is the filter parameter
* @param {String} m
* @default
*/
mainParameter: 'rotation',
calculateMatrix: function() {
var rad = this.rotation * Math.PI, cos = fabric.util.cos(rad), sin = fabric.util.sin(rad),
aThird = 1 / 3, aThirdSqtSin = Math.sqrt(aThird) * sin, OneMinusCos = 1 - cos;
this.matrix = [
1, 0, 0, 0, 0,
0, 1, 0, 0, 0,
0, 0, 1, 0, 0,
0, 0, 0, 1, 0
];
this.matrix[0] = cos + OneMinusCos / 3;
this.matrix[1] = aThird * OneMinusCos - aThirdSqtSin;
this.matrix[2] = aThird * OneMinusCos + aThirdSqtSin;
this.matrix[5] = aThird * OneMinusCos + aThirdSqtSin;
this.matrix[6] = cos + aThird * OneMinusCos;
this.matrix[7] = aThird * OneMinusCos - aThirdSqtSin;
this.matrix[10] = aThird * OneMinusCos - aThirdSqtSin;
this.matrix[11] = aThird * OneMinusCos + aThirdSqtSin;
this.matrix[12] = cos + aThird * OneMinusCos;
},
/**
* HueRotation isNeutralState implementation
* Used only in image applyFilters to discard filters that will not have an effect
* on the image
* @param {Object} options
**/
isNeutralState: function(options) {
this.calculateMatrix();
return filters.BaseFilter.prototype.isNeutralState.call(this, options);
},
/**
* Apply this filter to the input image data provided.
*
* Determines whether to use WebGL or Canvas2D based on the options.webgl flag.
*
* @param {Object} options
* @param {Number} options.passes The number of filters remaining to be executed
* @param {Boolean} options.webgl Whether to use webgl to render the filter.
* @param {WebGLTexture} options.sourceTexture The texture setup as the source to be filtered.
* @param {WebGLTexture} options.targetTexture The texture where filtered output should be drawn.
* @param {WebGLRenderingContext} options.context The GL context used for rendering.
* @param {Object} options.programCache A map of compiled shader programs, keyed by filter type.
*/
applyTo: function(options) {
this.calculateMatrix();
filters.BaseFilter.prototype.applyTo.call(this, options);
},
});
/**
* Returns filter instance from an object representation
* @static
* @param {Object} object Object to create an instance from
* @param {function} [callback] to be invoked after filter creation
* @return {fabric.Image.filters.HueRotation} Instance of fabric.Image.filters.HueRotation
*/
fabric.Image.filters.HueRotation.fromObject = fabric.Image.filters.BaseFilter.fromObject;
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
'use strict';
var fabric = global.fabric || (global.fabric = { }),
clone = fabric.util.object.clone;
if (fabric.Text) {
fabric.warn('fabric.Text is already defined');
return;
}
/**
* Text class
* @class fabric.Text
* @extends fabric.Object
* @return {fabric.Text} thisArg
* @tutorial {@link http://fabricjs.com/fabric-intro-part-2#text}
* @see {@link fabric.Text#initialize} for constructor definition
*/
fabric.Text = fabric.util.createClass(fabric.Object, /** @lends fabric.Text.prototype */ {
/**
* Properties which when set cause object to change dimensions
* @type Array
* @private
*/
_dimensionAffectingProps: [
'fontSize',
'fontWeight',
'fontFamily',
'fontStyle',
'lineHeight',
'text',
'charSpacing',
'textAlign',
'styles',
],
/**
* @private
*/
_reNewline: /\r?\n/,
/**
* Use this regular expression to filter for whitespaces that is not a new line.
* Mostly used when text is 'justify' aligned.
* @private
*/
_reSpacesAndTabs: /[ \t\r]/g,
/**
* Use this regular expression to filter for whitespace that is not a new line.
* Mostly used when text is 'justify' aligned.
* @private
*/
_reSpaceAndTab: /[ \t\r]/,
/**
* Use this regular expression to filter consecutive groups of non spaces.
* Mostly used when text is 'justify' aligned.
* @private
*/
_reWords: /\S+/g,
/**
* Type of an object
* @type String
* @default
*/
type: 'text',
/**
* Font size (in pixels)
* @type Number
* @default
*/
fontSize: 40,
/**
* Font weight (e.g. bold, normal, 400, 600, 800)
* @type {(Number|String)}
* @default
*/
fontWeight: 'normal',
/**
* Font family
* @type String
* @default
*/
fontFamily: 'Times New Roman',
/**
* Text decoration underline.
* @type Boolean
* @default
*/
underline: false,
/**
* Text decoration overline.
* @type Boolean
* @default
*/
overline: false,
/**
* Text decoration linethrough.
* @type Boolean
* @default
*/
linethrough: false,
/**
* Text alignment. Possible values: "left", "center", "right", "justify",
* "justify-left", "justify-center" or "justify-right".
* @type String
* @default
*/
textAlign: 'left',
/**
* Font style . Possible values: "", "normal", "italic" or "oblique".
* @type String
* @default
*/
fontStyle: 'normal',
/**
* Line height
* @type Number
* @default
*/
lineHeight: 1.16,
/**
* Superscript schema object (minimum overlap)
* @type {Object}
* @default
*/
superscript: {
size: 0.60, // fontSize factor
baseline: -0.35 // baseline-shift factor (upwards)
},
/**
* Subscript schema object (minimum overlap)
* @type {Object}
* @default
*/
subscript: {
size: 0.60, // fontSize factor
baseline: 0.11 // baseline-shift factor (downwards)
},
/**
* Background color of text lines
* @type String
* @default
*/
textBackgroundColor: '',
/**
* List of properties to consider when checking if
* state of an object is changed ({@link fabric.Object#hasStateChanged})
* as well as for history (undo/redo) purposes
* @type Array
*/
stateProperties: fabric.Object.prototype.stateProperties.concat('fontFamily',
'fontWeight',
'fontSize',
'text',
'underline',
'overline',
'linethrough',
'textAlign',
'fontStyle',
'lineHeight',
'textBackgroundColor',
'charSpacing',
'styles'),
/**
* List of properties to consider when checking if cache needs refresh
* @type Array
*/
cacheProperties: fabric.Object.prototype.cacheProperties.concat('fontFamily',
'fontWeight',
'fontSize',
'text',
'underline',
'overline',
'linethrough',
'textAlign',
'fontStyle',
'lineHeight',
'textBackgroundColor',
'charSpacing',
'styles'),
/**
* When defined, an object is rendered via stroke and this property specifies its color.
* <b>Backwards incompatibility note:</b> This property was named "strokeStyle" until v1.1.6
* @type String
* @default
*/
stroke: null,
/**
* Shadow object representing shadow of this shape.
* <b>Backwards incompatibility note:</b> This property was named "textShadow" (String) until v1.2.11
* @type fabric.Shadow
* @default
*/
shadow: null,
/**
* @private
*/
_fontSizeFraction: 0.222,
/**
* @private
*/
offsets: {
underline: 0.10,
linethrough: -0.315,
overline: -0.88
},
/**
* Text Line proportion to font Size (in pixels)
* @type Number
* @default
*/
_fontSizeMult: 1.13,
/**
* additional space between characters
* expressed in thousands of em unit
* @type Number
* @default
*/
charSpacing: 0,
/**
* Object containing character styles - top-level properties -> line numbers,
* 2nd-level properties - charater numbers
* @type Object
* @default
*/
styles: null,
/**
* Reference to a context to measure text char or couple of chars
* the cacheContext of the canvas will be used or a freshly created one if the object is not on canvas
* once created it will be referenced on fabric._measuringContext to avoide creating a canvas for every
* text object created.
* @type {CanvasRenderingContext2D}
* @default
*/
_measuringContext: null,
/**
* Baseline shift, stlyes only, keep at 0 for the main text object
* @type {Number}
* @default
*/
deltaY: 0,
/**
* Array of properties that define a style unit (of 'styles').
* @type {Array}
* @default
*/
_styleProperties: [
'stroke',
'strokeWidth',
'fill',
'fontFamily',
'fontSize',
'fontWeight',
'fontStyle',
'underline',
'overline',
'linethrough',
'deltaY',
'textBackgroundColor',
],
/**
* contains characters bounding boxes
*/
__charBounds: [],
/**
* use this size when measuring text. To avoid IE11 rounding errors
* @type {Number}
* @default
* @readonly
* @private
*/
CACHE_FONT_SIZE: 400,
/**
* contains the min text width to avoid getting 0
* @type {Number}
* @default
*/
MIN_TEXT_WIDTH: 2,
/**
* Constructor
* @param {String} text Text string
* @param {Object} [options] Options object
* @return {fabric.Text} thisArg
*/
initialize: function(text, options) {
this.styles = options ? (options.styles || { }) : { };
this.text = text;
this.__skipDimension = true;
this.callSuper('initialize', options);
this.__skipDimension = false;
this.initDimensions();
this.setCoords();
this.setupState({ propertySet: '_dimensionAffectingProps' });
},
/**
* Return a contex for measurement of text string.
* if created it gets stored for reuse
* @param {String} text Text string
* @param {Object} [options] Options object
* @return {fabric.Text} thisArg
*/
getMeasuringContext: function() {
// if we did not return we have to measure something.
if (!fabric._measuringContext) {
fabric._measuringContext = this.canvas && this.canvas.contextCache ||
fabric.util.createCanvasElement().getContext('2d');
}
return fabric._measuringContext;
},
/**
* @private
* Divides text into lines of text and lines of graphemes.
*/
_splitText: function() {
var newLines = this._splitTextIntoLines(this.text);
this.textLines = newLines.lines;
this._textLines = newLines.graphemeLines;
this._unwrappedTextLines = newLines._unwrappedLines;
this._text = newLines.graphemeText;
return newLines;
},
/**
* Initialize or update text dimensions.
* Updates this.width and this.height with the proper values.
* Does not return dimensions.
*/
initDimensions: function() {
if (this.__skipDimension) {
return;
}
this._splitText();
this._clearCache();
this.width = this.calcTextWidth() || this.cursorWidth || this.MIN_TEXT_WIDTH;
if (this.textAlign.indexOf('justify') !== -1) {
// once text is measured we need to make space fatter to make justified text.
this.enlargeSpaces();
}
this.height = this.calcTextHeight();
this.saveState({ propertySet: '_dimensionAffectingProps' });
},
/**
* Enlarge space boxes and shift the others
*/
enlargeSpaces: function() {
var diffSpace, currentLineWidth, numberOfSpaces, accumulatedSpace, line, charBound, spaces;
for (var i = 0, len = this._textLines.length; i < len; i++) {
if (this.textAlign !== 'justify' && (i === len - 1 || this.isEndOfWrapping(i))) {
continue;
}
accumulatedSpace = 0;
line = this._textLines[i];
currentLineWidth = this.getLineWidth(i);
if (currentLineWidth < this.width && (spaces = this.textLines[i].match(this._reSpacesAndTabs))) {
numberOfSpaces = spaces.length;
diffSpace = (this.width - currentLineWidth) / numberOfSpaces;
for (var j = 0, jlen = line.length; j <= jlen; j++) {
charBound = this.__charBounds[i][j];
if (this._reSpaceAndTab.test(line[j])) {
charBound.width += diffSpace;
charBound.kernedWidth += diffSpace;
charBound.left += accumulatedSpace;
accumulatedSpace += diffSpace;
}
else {
charBound.left += accumulatedSpace;
}
}
}
}
},
/**
* Detect if the text line is ended with an hard break
* text and itext do not have wrapping, return false
* @return {Boolean}
*/
isEndOfWrapping: function(lineIndex) {
return lineIndex === this._textLines.length - 1;
},
/**
* Detect if a line has a linebreak and so we need to account for it when moving
* and counting style.
* It return always for text and Itext.
* @return Number
*/
missingNewlineOffset: function() {
return 1;
},
/**
* Returns string representation of an instance
* @return {String} String representation of text object
*/
toString: function() {
return '#<fabric.Text (' + this.complexity() +
'): { "text": "' + this.text + '", "fontFamily": "' + this.fontFamily + '" }>';
},
/**
* Return the dimension and the zoom level needed to create a cache canvas
* big enough to host the object to be cached.
* @private
* @param {Object} dim.x width of object to be cached
* @param {Object} dim.y height of object to be cached
* @return {Object}.width width of canvas
* @return {Object}.height height of canvas
* @return {Object}.zoomX zoomX zoom value to unscale the canvas before drawing cache
* @return {Object}.zoomY zoomY zoom value to unscale the canvas before drawing cache
*/
_getCacheCanvasDimensions: function() {
var dims = this.callSuper('_getCacheCanvasDimensions');
var fontSize = this.fontSize;
dims.width += fontSize * dims.zoomX;
dims.height += fontSize * dims.zoomY;
return dims;
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_render: function(ctx) {
this._setTextStyles(ctx);
this._renderTextLinesBackground(ctx);
this._renderTextDecoration(ctx, 'underline');
this._renderText(ctx);
this._renderTextDecoration(ctx, 'overline');
this._renderTextDecoration(ctx, 'linethrough');
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_renderText: function(ctx) {
if (this.paintFirst === 'stroke') {
this._renderTextStroke(ctx);
this._renderTextFill(ctx);
}
else {
this._renderTextFill(ctx);
this._renderTextStroke(ctx);
}
},
/**
* Set the font parameter of the context with the object properties or with charStyle
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
* @param {Object} [charStyle] object with font style properties
* @param {String} [charStyle.fontFamily] Font Family
* @param {Number} [charStyle.fontSize] Font size in pixels. ( without px suffix )
* @param {String} [charStyle.fontWeight] Font weight
* @param {String} [charStyle.fontStyle] Font style (italic|normal)
*/
_setTextStyles: function(ctx, charStyle, forMeasuring) {
ctx.textBaseline = 'alphabetic';
ctx.font = this._getFontDeclaration(charStyle, forMeasuring);
},
/**
* calculate and return the text Width measuring each line.
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
* @return {Number} Maximum width of fabric.Text object
*/
calcTextWidth: function() {
var maxWidth = this.getLineWidth(0);
for (var i = 1, len = this._textLines.length; i < len; i++) {
var currentLineWidth = this.getLineWidth(i);
if (currentLineWidth > maxWidth) {
maxWidth = currentLineWidth;
}
}
return maxWidth;
},
/**
* @private
* @param {String} method Method name ("fillText" or "strokeText")
* @param {CanvasRenderingContext2D} ctx Context to render on
* @param {String} line Text to render
* @param {Number} left Left position of text
* @param {Number} top Top position of text
* @param {Number} lineIndex Index of a line in a text
*/
_renderTextLine: function(method, ctx, line, left, top, lineIndex) {
this._renderChars(method, ctx, line, left, top, lineIndex);
},
/**
* Renders the text background for lines, taking care of style
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_renderTextLinesBackground: function(ctx) {
if (!this.textBackgroundColor && !this.styleHas('textBackgroundColor')) {
return;
}
var lineTopOffset = 0, heightOfLine,
lineLeftOffset, originalFill = ctx.fillStyle,
line, lastColor,
leftOffset = this._getLeftOffset(),
topOffset = this._getTopOffset(),
boxStart = 0, boxWidth = 0, charBox, currentColor;
for (var i = 0, len = this._textLines.length; i < len; i++) {
heightOfLine = this.getHeightOfLine(i);
if (!this.textBackgroundColor && !this.styleHas('textBackgroundColor', i)) {
lineTopOffset += heightOfLine;
continue;
}
line = this._textLines[i];
lineLeftOffset = this._getLineLeftOffset(i);
boxWidth = 0;
boxStart = 0;
lastColor = this.getValueOfPropertyAt(i, 0, 'textBackgroundColor');
for (var j = 0, jlen = line.length; j < jlen; j++) {
charBox = this.__charBounds[i][j];
currentColor = this.getValueOfPropertyAt(i, j, 'textBackgroundColor');
if (currentColor !== lastColor) {
ctx.fillStyle = lastColor;
lastColor && ctx.fillRect(
leftOffset + lineLeftOffset + boxStart,
topOffset + lineTopOffset,
boxWidth,
heightOfLine / this.lineHeight
);
boxStart = charBox.left;
boxWidth = charBox.width;
lastColor = currentColor;
}
else {
boxWidth += charBox.kernedWidth;
}
}
if (currentColor) {
ctx.fillStyle = currentColor;
ctx.fillRect(
leftOffset + lineLeftOffset + boxStart,
topOffset + lineTopOffset,
boxWidth,
heightOfLine / this.lineHeight
);
}
lineTopOffset += heightOfLine;
}
ctx.fillStyle = originalFill;
// if there is text background color no
// other shadows should be casted
this._removeShadow(ctx);
},
/**
* @private
* @param {Object} decl style declaration for cache
* @param {String} decl.fontFamily fontFamily
* @param {String} decl.fontStyle fontStyle
* @param {String} decl.fontWeight fontWeight
* @return {Object} reference to cache
*/
getFontCache: function(decl) {
var fontFamily = decl.fontFamily.toLowerCase();
if (!fabric.charWidthsCache[fontFamily]) {
fabric.charWidthsCache[fontFamily] = { };
}
var cache = fabric.charWidthsCache[fontFamily],
cacheProp = decl.fontStyle.toLowerCase() + '_' + (decl.fontWeight + '').toLowerCase();
if (!cache[cacheProp]) {
cache[cacheProp] = { };
}
return cache[cacheProp];
},
/**
* apply all the character style to canvas for rendering
* @private
* @param {String} _char
* @param {Number} lineIndex
* @param {Number} charIndex
* @param {Object} [decl]
*/
_applyCharStyles: function(method, ctx, lineIndex, charIndex, styleDeclaration) {
this._setFillStyles(ctx, styleDeclaration);
this._setStrokeStyles(ctx, styleDeclaration);
ctx.font = this._getFontDeclaration(styleDeclaration);
},
/**
* measure and return the width of a single character.
* possibly overridden to accommodate different measure logic or
* to hook some external lib for character measurement
* @private
* @param {String} _char, char to be measured
* @param {Object} charStyle style of char to be measured
* @param {String} [previousChar] previous char
* @param {Object} [prevCharStyle] style of previous char
*/
_measureChar: function(_char, charStyle, previousChar, prevCharStyle) {
// first i try to return from cache
var fontCache = this.getFontCache(charStyle), fontDeclaration = this._getFontDeclaration(charStyle),
previousFontDeclaration = this._getFontDeclaration(prevCharStyle), couple = previousChar + _char,
stylesAreEqual = fontDeclaration === previousFontDeclaration, width, coupleWidth, previousWidth,
fontMultiplier = charStyle.fontSize / this.CACHE_FONT_SIZE, kernedWidth;
if (previousChar && fontCache[previousChar] !== undefined) {
previousWidth = fontCache[previousChar];
}
if (fontCache[_char] !== undefined) {
kernedWidth = width = fontCache[_char];
}
if (stylesAreEqual && fontCache[couple] !== undefined) {
coupleWidth = fontCache[couple];
kernedWidth = coupleWidth - previousWidth;
}
if (width === undefined || previousWidth === undefined || coupleWidth === undefined) {
var ctx = this.getMeasuringContext();
// send a TRUE to specify measuring font size CACHE_FONT_SIZE
this._setTextStyles(ctx, charStyle, true);
}
if (width === undefined) {
kernedWidth = width = ctx.measureText(_char).width;
fontCache[_char] = width;
}
if (previousWidth === undefined && stylesAreEqual && previousChar) {
previousWidth = ctx.measureText(previousChar).width;
fontCache[previousChar] = previousWidth;
}
if (stylesAreEqual && coupleWidth === undefined) {
// we can measure the kerning couple and subtract the width of the previous character
coupleWidth = ctx.measureText(couple).width;
fontCache[couple] = coupleWidth;
kernedWidth = coupleWidth - previousWidth;
}
return { width: width * fontMultiplier, kernedWidth: kernedWidth * fontMultiplier };
},
/**
* Computes height of character at given position
* @param {Number} line the line index number
* @param {Number} _char the character index number
* @return {Number} fontSize of the character
*/
getHeightOfChar: function(line, _char) {
return this.getValueOfPropertyAt(line, _char, 'fontSize');
},
/**
* measure a text line measuring all characters.
* @param {Number} lineIndex line number
* @return {Number} Line width
*/
measureLine: function(lineIndex) {
var lineInfo = this._measureLine(lineIndex);
if (this.charSpacing !== 0) {
lineInfo.width -= this._getWidthOfCharSpacing();
}
if (lineInfo.width < 0) {
lineInfo.width = 0;
}
return lineInfo;
},
/**
* measure every grapheme of a line, populating __charBounds
* @param {Number} lineIndex
* @return {Object} object.width total width of characters
* @return {Object} object.widthOfSpaces length of chars that match this._reSpacesAndTabs
*/
_measureLine: function(lineIndex) {
var width = 0, i, grapheme, line = this._textLines[lineIndex], prevGrapheme,
graphemeInfo, numOfSpaces = 0, lineBounds = new Array(line.length);
this.__charBounds[lineIndex] = lineBounds;
for (i = 0; i < line.length; i++) {
grapheme = line[i];
graphemeInfo = this._getGraphemeBox(grapheme, lineIndex, i, prevGrapheme);
lineBounds[i] = graphemeInfo;
width += graphemeInfo.kernedWidth;
prevGrapheme = grapheme;
}
// this latest bound box represent the last character of the line
// to simplify cursor handling in interactive mode.
lineBounds[i] = {
left: graphemeInfo ? graphemeInfo.left + graphemeInfo.width : 0,
width: 0,
kernedWidth: 0,
height: this.fontSize
};
return { width: width, numOfSpaces: numOfSpaces };
},
/**
* Measure and return the info of a single grapheme.
* needs the the info of previous graphemes already filled
* @private
* @param {String} grapheme to be measured
* @param {Number} lineIndex index of the line where the char is
* @param {Number} charIndex position in the line
* @param {String} [prevGrapheme] character preceding the one to be measured
*/
_getGraphemeBox: function(grapheme, lineIndex, charIndex, prevGrapheme, skipLeft) {
var style = this.getCompleteStyleDeclaration(lineIndex, charIndex),
prevStyle = prevGrapheme ? this.getCompleteStyleDeclaration(lineIndex, charIndex - 1) : { },
info = this._measureChar(grapheme, style, prevGrapheme, prevStyle),
kernedWidth = info.kernedWidth,
width = info.width, charSpacing;
if (this.charSpacing !== 0) {
charSpacing = this._getWidthOfCharSpacing();
width += charSpacing;
kernedWidth += charSpacing;
}
var box = {
width: width,
left: 0,
height: style.fontSize,
kernedWidth: kernedWidth,
deltaY: style.deltaY,
};
if (charIndex > 0 && !skipLeft) {
var previousBox = this.__charBounds[lineIndex][charIndex - 1];
box.left = previousBox.left + previousBox.width + info.kernedWidth - info.width;
}
return box;
},
/**
* Calculate height of line at 'lineIndex'
* @param {Number} lineIndex index of line to calculate
* @return {Number}
*/
getHeightOfLine: function(lineIndex) {
if (this.__lineHeights[lineIndex]) {
return this.__lineHeights[lineIndex];
}
var line = this._textLines[lineIndex],
// char 0 is measured before the line cycle because it nneds to char
// emptylines
maxHeight = this.getHeightOfChar(lineIndex, 0);
for (var i = 1, len = line.length; i < len; i++) {
maxHeight = Math.max(this.getHeightOfChar(lineIndex, i), maxHeight);
}
return this.__lineHeights[lineIndex] = maxHeight * this.lineHeight * this._fontSizeMult;
},
/**
* Calculate text box height
*/
calcTextHeight: function() {
var lineHeight, height = 0;
for (var i = 0, len = this._textLines.length; i < len; i++) {
lineHeight = this.getHeightOfLine(i);
height += (i === len - 1 ? lineHeight / this.lineHeight : lineHeight);
}
return height;
},
/**
* @private
* @return {Number} Left offset
*/
_getLeftOffset: function() {
return -this.width / 2;
},
/**
* @private
* @return {Number} Top offset
*/
_getTopOffset: function() {
return -this.height / 2;
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
* @param {String} method Method name ("fillText" or "strokeText")
*/
_renderTextCommon: function(ctx, method) {
ctx.save();
var lineHeights = 0, left = this._getLeftOffset(), top = this._getTopOffset(),
offsets = this._applyPatternGradientTransform(ctx, method === 'fillText' ? this.fill : this.stroke);
for (var i = 0, len = this._textLines.length; i < len; i++) {
var heightOfLine = this.getHeightOfLine(i),
maxHeight = heightOfLine / this.lineHeight,
leftOffset = this._getLineLeftOffset(i);
this._renderTextLine(
method,
ctx,
this._textLines[i],
left + leftOffset - offsets.offsetX,
top + lineHeights + maxHeight - offsets.offsetY,
i
);
lineHeights += heightOfLine;
}
ctx.restore();
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_renderTextFill: function(ctx) {
if (!this.fill && !this.styleHas('fill')) {
return;
}
this._renderTextCommon(ctx, 'fillText');
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_renderTextStroke: function(ctx) {
if ((!this.stroke || this.strokeWidth === 0) && this.isEmptyStyles()) {
return;
}
if (this.shadow && !this.shadow.affectStroke) {
this._removeShadow(ctx);
}
ctx.save();
this._setLineDash(ctx, this.strokeDashArray);
ctx.beginPath();
this._renderTextCommon(ctx, 'strokeText');
ctx.closePath();
ctx.restore();
},
/**
* @private
* @param {String} method
* @param {CanvasRenderingContext2D} ctx Context to render on
* @param {String} line Content of the line
* @param {Number} left
* @param {Number} top
* @param {Number} lineIndex
* @param {Number} charOffset
*/
_renderChars: function(method, ctx, line, left, top, lineIndex) {
// set proper line offset
var lineHeight = this.getHeightOfLine(lineIndex),
isJustify = this.textAlign.indexOf('justify') !== -1,
actualStyle,
nextStyle,
charsToRender = '',
charBox,
boxWidth = 0,
timeToRender,
shortCut = !isJustify && this.charSpacing === 0 && this.isEmptyStyles(lineIndex);
ctx.save();
top -= lineHeight * this._fontSizeFraction / this.lineHeight;
if (shortCut) {
// render all the line in one pass without checking
this._renderChar(method, ctx, lineIndex, 0, this.textLines[lineIndex], left, top, lineHeight);
ctx.restore();
return;
}
for (var i = 0, len = line.length - 1; i <= len; i++) {
timeToRender = i === len || this.charSpacing;
charsToRender += line[i];
charBox = this.__charBounds[lineIndex][i];
if (boxWidth === 0) {
left += charBox.kernedWidth - charBox.width;
boxWidth += charBox.width;
}
else {
boxWidth += charBox.kernedWidth;
}
if (isJustify && !timeToRender) {
if (this._reSpaceAndTab.test(line[i])) {
timeToRender = true;
}
}
if (!timeToRender) {
// if we have charSpacing, we render char by char
actualStyle = actualStyle || this.getCompleteStyleDeclaration(lineIndex, i);
nextStyle = this.getCompleteStyleDeclaration(lineIndex, i + 1);
timeToRender = this._hasStyleChanged(actualStyle, nextStyle);
}
if (timeToRender) {
this._renderChar(method, ctx, lineIndex, i, charsToRender, left, top, lineHeight);
charsToRender = '';
actualStyle = nextStyle;
left += boxWidth;
boxWidth = 0;
}
}
ctx.restore();
},
/**
* @private
* @param {String} method
* @param {CanvasRenderingContext2D} ctx Context to render on
* @param {Number} lineIndex
* @param {Number} charIndex
* @param {String} _char
* @param {Number} left Left coordinate
* @param {Number} top Top coordinate
* @param {Number} lineHeight Height of the line
*/
_renderChar: function(method, ctx, lineIndex, charIndex, _char, left, top) {
var decl = this._getStyleDeclaration(lineIndex, charIndex),
fullDecl = this.getCompleteStyleDeclaration(lineIndex, charIndex),
shouldFill = method === 'fillText' && fullDecl.fill,
shouldStroke = method === 'strokeText' && fullDecl.stroke && fullDecl.strokeWidth;
if (!shouldStroke && !shouldFill) {
return;
}
decl && ctx.save();
this._applyCharStyles(method, ctx, lineIndex, charIndex, fullDecl);
if (decl && decl.textBackgroundColor) {
this._removeShadow(ctx);
}
if (decl && decl.deltaY) {
top += decl.deltaY;
}
shouldFill && ctx.fillText(_char, left, top);
shouldStroke && ctx.strokeText(_char, left, top);
decl && ctx.restore();
},
/**
* Turns the character into a 'superior figure' (i.e. 'superscript')
* @param {Number} start selection start
* @param {Number} end selection end
* @returns {fabric.Text} thisArg
* @chainable
*/
setSuperscript: function(start, end) {
return this._setScript(start, end, this.superscript);
},
/**
* Turns the character into an 'inferior figure' (i.e. 'subscript')
* @param {Number} start selection start
* @param {Number} end selection end
* @returns {fabric.Text} thisArg
* @chainable
*/
setSubscript: function(start, end) {
return this._setScript(start, end, this.subscript);
},
/**
* Applies 'schema' at given position
* @private
* @param {Number} start selection start
* @param {Number} end selection end
* @param {Number} schema
* @returns {fabric.Text} thisArg
* @chainable
*/
_setScript: function(start, end, schema) {
var loc = this.get2DCursorLocation(start, true),
fontSize = this.getValueOfPropertyAt(loc.lineIndex, loc.charIndex, 'fontSize'),
dy = this.getValueOfPropertyAt(loc.lineIndex, loc.charIndex, 'deltaY'),
style = { fontSize: fontSize * schema.size, deltaY: dy + fontSize * schema.baseline };
this.setSelectionStyles(style, start, end);
return this;
},
/**
* @private
* @param {Object} prevStyle
* @param {Object} thisStyle
*/
_hasStyleChanged: function(prevStyle, thisStyle) {
return prevStyle.fill !== thisStyle.fill ||
prevStyle.stroke !== thisStyle.stroke ||
prevStyle.strokeWidth !== thisStyle.strokeWidth ||
prevStyle.fontSize !== thisStyle.fontSize ||
prevStyle.fontFamily !== thisStyle.fontFamily ||
prevStyle.fontWeight !== thisStyle.fontWeight ||
prevStyle.fontStyle !== thisStyle.fontStyle ||
prevStyle.deltaY !== thisStyle.deltaY;
},
/**
* @private
* @param {Object} prevStyle
* @param {Object} thisStyle
*/
_hasStyleChangedForSvg: function(prevStyle, thisStyle) {
return this._hasStyleChanged(prevStyle, thisStyle) ||
prevStyle.overline !== thisStyle.overline ||
prevStyle.underline !== thisStyle.underline ||
prevStyle.linethrough !== thisStyle.linethrough;
},
/**
* @private
* @param {Number} lineIndex index text line
* @return {Number} Line left offset
*/
_getLineLeftOffset: function(lineIndex) {
var lineWidth = this.getLineWidth(lineIndex);
if (this.textAlign === 'center') {
return (this.width - lineWidth) / 2;
}
if (this.textAlign === 'right') {
return this.width - lineWidth;
}
if (this.textAlign === 'justify-center' && this.isEndOfWrapping(lineIndex)) {
return (this.width - lineWidth) / 2;
}
if (this.textAlign === 'justify-right' && this.isEndOfWrapping(lineIndex)) {
return this.width - lineWidth;
}
return 0;
},
/**
* @private
*/
_clearCache: function() {
this.__lineWidths = [];
this.__lineHeights = [];
this.__charBounds = [];
},
/**
* @private
*/
_shouldClearDimensionCache: function() {
var shouldClear = this._forceClearCache;
shouldClear || (shouldClear = this.hasStateChanged('_dimensionAffectingProps'));
if (shouldClear) {
this.dirty = true;
this._forceClearCache = false;
}
return shouldClear;
},
/**
* Measure a single line given its index. Used to calculate the initial
* text bounding box. The values are calculated and stored in __lineWidths cache.
* @private
* @param {Number} lineIndex line number
* @return {Number} Line width
*/
getLineWidth: function(lineIndex) {
if (this.__lineWidths[lineIndex]) {
return this.__lineWidths[lineIndex];
}
var width, line = this._textLines[lineIndex], lineInfo;
if (line === '') {
width = 0;
}
else {
lineInfo = this.measureLine(lineIndex);
width = lineInfo.width;
}
this.__lineWidths[lineIndex] = width;
return width;
},
_getWidthOfCharSpacing: function() {
if (this.charSpacing !== 0) {
return this.fontSize * this.charSpacing / 1000;
}
return 0;
},
/**
* Retrieves the value of property at given character position
* @param {Number} lineIndex the line number
* @param {Number} charIndex the charater number
* @param {String} property the property name
* @returns the value of 'property'
*/
getValueOfPropertyAt: function(lineIndex, charIndex, property) {
var charStyle = this._getStyleDeclaration(lineIndex, charIndex);
if (charStyle && typeof charStyle[property] !== 'undefined') {
return charStyle[property];
}
return this[property];
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_renderTextDecoration: function(ctx, type) {
if (!this[type] && !this.styleHas(type)) {
return;
}
var heightOfLine, size, _size,
lineLeftOffset, dy, _dy,
line, lastDecoration,
leftOffset = this._getLeftOffset(),
topOffset = this._getTopOffset(), top,
boxStart, boxWidth, charBox, currentDecoration,
maxHeight, currentFill, lastFill,
charSpacing = this._getWidthOfCharSpacing();
for (var i = 0, len = this._textLines.length; i < len; i++) {
heightOfLine = this.getHeightOfLine(i);
if (!this[type] && !this.styleHas(type, i)) {
topOffset += heightOfLine;
continue;
}
line = this._textLines[i];
maxHeight = heightOfLine / this.lineHeight;
lineLeftOffset = this._getLineLeftOffset(i);
boxStart = 0;
boxWidth = 0;
lastDecoration = this.getValueOfPropertyAt(i, 0, type);
lastFill = this.getValueOfPropertyAt(i, 0, 'fill');
top = topOffset + maxHeight * (1 - this._fontSizeFraction);
size = this.getHeightOfChar(i, 0);
dy = this.getValueOfPropertyAt(i, 0, 'deltaY');
for (var j = 0, jlen = line.length; j < jlen; j++) {
charBox = this.__charBounds[i][j];
currentDecoration = this.getValueOfPropertyAt(i, j, type);
currentFill = this.getValueOfPropertyAt(i, j, 'fill');
_size = this.getHeightOfChar(i, j);
_dy = this.getValueOfPropertyAt(i, j, 'deltaY');
if ((currentDecoration !== lastDecoration || currentFill !== lastFill || _size !== size || _dy !== dy) &&
boxWidth > 0) {
ctx.fillStyle = lastFill;
lastDecoration && lastFill && ctx.fillRect(
leftOffset + lineLeftOffset + boxStart,
top + this.offsets[type] * size + dy,
boxWidth,
this.fontSize / 15
);
boxStart = charBox.left;
boxWidth = charBox.width;
lastDecoration = currentDecoration;
lastFill = currentFill;
size = _size;
dy = _dy;
}
else {
boxWidth += charBox.kernedWidth;
}
}
ctx.fillStyle = currentFill;
currentDecoration && currentFill && ctx.fillRect(
leftOffset + lineLeftOffset + boxStart,
top + this.offsets[type] * size + dy,
boxWidth - charSpacing,
this.fontSize / 15
);
topOffset += heightOfLine;
}
// if there is text background color no
// other shadows should be casted
this._removeShadow(ctx);
},
/**
* return font declaration string for canvas context
* @param {Object} [styleObject] object
* @returns {String} font declaration formatted for canvas context.
*/
_getFontDeclaration: function(styleObject, forMeasuring) {
var style = styleObject || this, family = this.fontFamily,
fontIsGeneric = fabric.Text.genericFonts.indexOf(family.toLowerCase()) > -1;
var fontFamily = family === undefined ||
family.indexOf('\'') > -1 || family.indexOf(',') > -1 ||
family.indexOf('"') > -1 || fontIsGeneric
? style.fontFamily : '"' + style.fontFamily + '"';
return [
// node-canvas needs "weight style", while browsers need "style weight"
// verify if this can be fixed in JSDOM
(fabric.isLikelyNode ? style.fontWeight : style.fontStyle),
(fabric.isLikelyNode ? style.fontStyle : style.fontWeight),
forMeasuring ? this.CACHE_FONT_SIZE + 'px' : style.fontSize + 'px',
fontFamily
].join(' ');
},
/**
* Renders text instance on a specified context
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
render: function(ctx) {
// do not render if object is not visible
if (!this.visible) {
return;
}
if (this.canvas && this.canvas.skipOffscreen && !this.group && !this.isOnScreen()) {
return;
}
if (this._shouldClearDimensionCache()) {
this.initDimensions();
}
this.callSuper('render', ctx);
},
/**
* Returns the text as an array of lines.
* @param {String} text text to split
* @returns {Array} Lines in the text
*/
_splitTextIntoLines: function(text) {
var lines = text.split(this._reNewline),
newLines = new Array(lines.length),
newLine = ['\n'],
newText = [];
for (var i = 0; i < lines.length; i++) {
newLines[i] = fabric.util.string.graphemeSplit(lines[i]);
newText = newText.concat(newLines[i], newLine);
}
newText.pop();
return { _unwrappedLines: newLines, lines: lines, graphemeText: newText, graphemeLines: newLines };
},
/**
* Returns object representation of an instance
* @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output
* @return {Object} Object representation of an instance
*/
toObject: function(propertiesToInclude) {
var additionalProperties = [
'text',
'fontSize',
'fontWeight',
'fontFamily',
'fontStyle',
'lineHeight',
'underline',
'overline',
'linethrough',
'textAlign',
'textBackgroundColor',
'charSpacing',
].concat(propertiesToInclude);
var obj = this.callSuper('toObject', additionalProperties);
obj.styles = clone(this.styles, true);
return obj;
},
/**
* Sets property to a given value. When changing position/dimension -related properties (left, top, scale, angle, etc.) `set` does not update position of object's borders/controls. If you need to update those, call `setCoords()`.
* @param {String|Object} key Property name or object (if object, iterate over the object properties)
* @param {Object|Function} value Property value (if function, the value is passed into it and its return value is used as a new one)
* @return {fabric.Object} thisArg
* @chainable
*/
set: function(key, value) {
this.callSuper('set', key, value);
var needsDims = false;
if (typeof key === 'object') {
for (var _key in key) {
needsDims = needsDims || this._dimensionAffectingProps.indexOf(_key) !== -1;
}
}
else {
needsDims = this._dimensionAffectingProps.indexOf(key) !== -1;
}
if (needsDims) {
this.initDimensions();
this.setCoords();
}
return this;
},
/**
* Returns complexity of an instance
* @return {Number} complexity
*/
complexity: function() {
return 1;
}
});
/* _FROM_SVG_START_ */
/**
* List of attribute names to account for when parsing SVG element (used by {@link fabric.Text.fromElement})
* @static
* @memberOf fabric.Text
* @see: http://www.w3.org/TR/SVG/text.html#TextElement
*/
fabric.Text.ATTRIBUTE_NAMES = fabric.SHARED_ATTRIBUTES.concat(
'x y dx dy font-family font-style font-weight font-size letter-spacing text-decoration text-anchor'.split(' '));
/**
* Default SVG font size
* @static
* @memberOf fabric.Text
*/
fabric.Text.DEFAULT_SVG_FONT_SIZE = 16;
/**
* Returns fabric.Text instance from an SVG element (<b>not yet implemented</b>)
* @static
* @memberOf fabric.Text
* @param {SVGElement} element Element to parse
* @param {Function} callback callback function invoked after parsing
* @param {Object} [options] Options object
*/
fabric.Text.fromElement = function(element, callback, options) {
if (!element) {
return callback(null);
}
var parsedAttributes = fabric.parseAttributes(element, fabric.Text.ATTRIBUTE_NAMES),
parsedAnchor = parsedAttributes.textAnchor || 'left';
options = fabric.util.object.extend((options ? clone(options) : { }), parsedAttributes);
options.top = options.top || 0;
options.left = options.left || 0;
if (parsedAttributes.textDecoration) {
var textDecoration = parsedAttributes.textDecoration;
if (textDecoration.indexOf('underline') !== -1) {
options.underline = true;
}
if (textDecoration.indexOf('overline') !== -1) {
options.overline = true;
}
if (textDecoration.indexOf('line-through') !== -1) {
options.linethrough = true;
}
delete options.textDecoration;
}
if ('dx' in parsedAttributes) {
options.left += parsedAttributes.dx;
}
if ('dy' in parsedAttributes) {
options.top += parsedAttributes.dy;
}
if (!('fontSize' in options)) {
options.fontSize = fabric.Text.DEFAULT_SVG_FONT_SIZE;
}
var textContent = '';
// The XML is not properly parsed in IE9 so a workaround to get
// textContent is through firstChild.data. Another workaround would be
// to convert XML loaded from a file to be converted using DOMParser (same way loadSVGFromString() does)
if (!('textContent' in element)) {
if ('firstChild' in element && element.firstChild !== null) {
if ('data' in element.firstChild && element.firstChild.data !== null) {
textContent = element.firstChild.data;
}
}
}
else {
textContent = element.textContent;
}
textContent = textContent.replace(/^\s+|\s+$|\n+/g, '').replace(/\s+/g, ' ');
var originalStrokeWidth = options.strokeWidth;
options.strokeWidth = 0;
var text = new fabric.Text(textContent, options),
textHeightScaleFactor = text.getScaledHeight() / text.height,
lineHeightDiff = (text.height + text.strokeWidth) * text.lineHeight - text.height,
scaledDiff = lineHeightDiff * textHeightScaleFactor,
textHeight = text.getScaledHeight() + scaledDiff,
offX = 0;
/*
Adjust positioning:
x/y attributes in SVG correspond to the bottom-left corner of text bounding box
fabric output by default at top, left.
*/
if (parsedAnchor === 'center') {
offX = text.getScaledWidth() / 2;
}
if (parsedAnchor === 'right') {
offX = text.getScaledWidth();
}
text.set({
left: text.left - offX,
top: text.top - (textHeight - text.fontSize * (0.07 + text._fontSizeFraction)) / text.lineHeight,
strokeWidth: typeof originalStrokeWidth !== 'undefined' ? originalStrokeWidth : 1,
});
callback(text);
};
/* _FROM_SVG_END_ */
/**
* Returns fabric.Text instance from an object representation
* @static
* @memberOf fabric.Text
* @param {Object} object Object to create an instance from
* @param {Function} [callback] Callback to invoke when an fabric.Text instance is created
*/
fabric.Text.fromObject = function(object, callback) {
return fabric.Object._fromObject('Text', object, callback, 'text');
};
fabric.Text.genericFonts = ['sans-serif', 'serif', 'cursive', 'fantasy', 'monospace'];
fabric.util.createAccessors && fabric.util.createAccessors(fabric.Text);
})(typeof exports !== 'undefined' ? exports : this);
(function() {
fabric.util.object.extend(fabric.Text.prototype, /** @lends fabric.Text.prototype */ {
/**
* Returns true if object has no styling or no styling in a line
* @param {Number} lineIndex , lineIndex is on wrapped lines.
* @return {Boolean}
*/
isEmptyStyles: function(lineIndex) {
if (!this.styles) {
return true;
}
if (typeof lineIndex !== 'undefined' && !this.styles[lineIndex]) {
return true;
}
var obj = typeof lineIndex === 'undefined' ? this.styles : { line: this.styles[lineIndex] };
for (var p1 in obj) {
for (var p2 in obj[p1]) {
// eslint-disable-next-line no-unused-vars
for (var p3 in obj[p1][p2]) {
return false;
}
}
}
return true;
},
/**
* Returns true if object has a style property or has it ina specified line
* This function is used to detect if a text will use a particular property or not.
* @param {String} property to check for
* @param {Number} lineIndex to check the style on
* @return {Boolean}
*/
styleHas: function(property, lineIndex) {
if (!this.styles || !property || property === '') {
return false;
}
if (typeof lineIndex !== 'undefined' && !this.styles[lineIndex]) {
return false;
}
var obj = typeof lineIndex === 'undefined' ? this.styles : { 0: this.styles[lineIndex] };
// eslint-disable-next-line
for (var p1 in obj) {
// eslint-disable-next-line
for (var p2 in obj[p1]) {
if (typeof obj[p1][p2][property] !== 'undefined') {
return true;
}
}
}
return false;
},
/**
* Check if characters in a text have a value for a property
* whose value matches the textbox's value for that property. If so,
* the character-level property is deleted. If the character
* has no other properties, then it is also deleted. Finally,
* if the line containing that character has no other characters
* then it also is deleted.
*
* @param {string} property The property to compare between characters and text.
*/
cleanStyle: function(property) {
if (!this.styles || !property || property === '') {
return false;
}
var obj = this.styles, stylesCount = 0, letterCount, stylePropertyValue,
allStyleObjectPropertiesMatch = true, graphemeCount = 0, styleObject;
// eslint-disable-next-line
for (var p1 in obj) {
letterCount = 0;
// eslint-disable-next-line
for (var p2 in obj[p1]) {
var styleObject = obj[p1][p2],
stylePropertyHasBeenSet = styleObject.hasOwnProperty(property);
stylesCount++;
if (stylePropertyHasBeenSet) {
if (!stylePropertyValue) {
stylePropertyValue = styleObject[property];
}
else if (styleObject[property] !== stylePropertyValue) {
allStyleObjectPropertiesMatch = false;
}
if (styleObject[property] === this[property]) {
delete styleObject[property];
}
}
else {
allStyleObjectPropertiesMatch = false;
}
if (Object.keys(styleObject).length !== 0) {
letterCount++;
}
else {
delete obj[p1][p2];
}
}
if (letterCount === 0) {
delete obj[p1];
}
}
// if every grapheme has the same style set then
// delete those styles and set it on the parent
for (var i = 0; i < this._textLines.length; i++) {
graphemeCount += this._textLines[i].length;
}
if (allStyleObjectPropertiesMatch && stylesCount === graphemeCount) {
this[property] = stylePropertyValue;
this.removeStyle(property);
}
},
/**
* Remove a style property or properties from all individual character styles
* in a text object. Deletes the character style object if it contains no other style
* props. Deletes a line style object if it contains no other character styles.
*
* @param {String} props The property to remove from character styles.
*/
removeStyle: function(property) {
if (!this.styles || !property || property === '') {
return;
}
var obj = this.styles, line, lineNum, charNum;
for (lineNum in obj) {
line = obj[lineNum];
for (charNum in line) {
delete line[charNum][property];
if (Object.keys(line[charNum]).length === 0) {
delete line[charNum];
}
}
if (Object.keys(line).length === 0) {
delete obj[lineNum];
}
}
},
/**
* @private
*/
_extendStyles: function(index, styles) {
var loc = this.get2DCursorLocation(index);
if (!this._getLineStyle(loc.lineIndex)) {
this._setLineStyle(loc.lineIndex);
}
if (!this._getStyleDeclaration(loc.lineIndex, loc.charIndex)) {
this._setStyleDeclaration(loc.lineIndex, loc.charIndex, {});
}
fabric.util.object.extend(this._getStyleDeclaration(loc.lineIndex, loc.charIndex), styles);
},
/**
* Returns 2d representation (lineIndex and charIndex) of cursor (or selection start)
* @param {Number} [selectionStart] Optional index. When not given, current selectionStart is used.
* @param {Boolean} [skipWrapping] consider the location for unwrapped lines. usefull to manage styles.
*/
get2DCursorLocation: function(selectionStart, skipWrapping) {
if (typeof selectionStart === 'undefined') {
selectionStart = this.selectionStart;
}
var lines = skipWrapping ? this._unwrappedTextLines : this._textLines,
len = lines.length;
for (var i = 0; i < len; i++) {
if (selectionStart <= lines[i].length) {
return {
lineIndex: i,
charIndex: selectionStart
};
}
selectionStart -= lines[i].length + this.missingNewlineOffset(i);
}
return {
lineIndex: i - 1,
charIndex: lines[i - 1].length < selectionStart ? lines[i - 1].length : selectionStart
};
},
/**
* Gets style of a current selection/cursor (at the start position)
* if startIndex or endIndex are not provided, slectionStart or selectionEnd will be used.
* @param {Number} [startIndex] Start index to get styles at
* @param {Number} [endIndex] End index to get styles at, if not specified selectionEnd or startIndex + 1
* @param {Boolean} [complete] get full style or not
* @return {Array} styles an array with one, zero or more Style objects
*/
getSelectionStyles: function(startIndex, endIndex, complete) {
if (typeof startIndex === 'undefined') {
startIndex = this.selectionStart || 0;
}
if (typeof endIndex === 'undefined') {
endIndex = this.selectionEnd || startIndex;
}
var styles = [];
for (var i = startIndex; i < endIndex; i++) {
styles.push(this.getStyleAtPosition(i, complete));
}
return styles;
},
/**
* Gets style of a current selection/cursor position
* @param {Number} position to get styles at
* @param {Boolean} [complete] full style if true
* @return {Object} style Style object at a specified index
* @private
*/
getStyleAtPosition: function(position, complete) {
var loc = this.get2DCursorLocation(position),
style = complete ? this.getCompleteStyleDeclaration(loc.lineIndex, loc.charIndex) :
this._getStyleDeclaration(loc.lineIndex, loc.charIndex);
return style || {};
},
/**
* Sets style of a current selection, if no selection exist, do not set anything.
* @param {Object} [styles] Styles object
* @param {Number} [startIndex] Start index to get styles at
* @param {Number} [endIndex] End index to get styles at, if not specified selectionEnd or startIndex + 1
* @return {fabric.IText} thisArg
* @chainable
*/
setSelectionStyles: function(styles, startIndex, endIndex) {
if (typeof startIndex === 'undefined') {
startIndex = this.selectionStart || 0;
}
if (typeof endIndex === 'undefined') {
endIndex = this.selectionEnd || startIndex;
}
for (var i = startIndex; i < endIndex; i++) {
this._extendStyles(i, styles);
}
/* not included in _extendStyles to avoid clearing cache more than once */
this._forceClearCache = true;
return this;
},
/**
* get the reference, not a clone, of the style object for a given character
* @param {Number} lineIndex
* @param {Number} charIndex
* @return {Object} style object
*/
_getStyleDeclaration: function(lineIndex, charIndex) {
var lineStyle = this.styles && this.styles[lineIndex];
if (!lineStyle) {
return null;
}
return lineStyle[charIndex];
},
/**
* return a new object that contains all the style property for a character
* the object returned is newly created
* @param {Number} lineIndex of the line where the character is
* @param {Number} charIndex position of the character on the line
* @return {Object} style object
*/
getCompleteStyleDeclaration: function(lineIndex, charIndex) {
var style = this._getStyleDeclaration(lineIndex, charIndex) || { },
styleObject = { }, prop;
for (var i = 0; i < this._styleProperties.length; i++) {
prop = this._styleProperties[i];
styleObject[prop] = typeof style[prop] === 'undefined' ? this[prop] : style[prop];
}
return styleObject;
},
/**
* @param {Number} lineIndex
* @param {Number} charIndex
* @param {Object} style
* @private
*/
_setStyleDeclaration: function(lineIndex, charIndex, style) {
this.styles[lineIndex][charIndex] = style;
},
/**
*
* @param {Number} lineIndex
* @param {Number} charIndex
* @private
*/
_deleteStyleDeclaration: function(lineIndex, charIndex) {
delete this.styles[lineIndex][charIndex];
},
/**
* @param {Number} lineIndex
* @return {Boolean} if the line exists or not
* @private
*/
_getLineStyle: function(lineIndex) {
return !!this.styles[lineIndex];
},
/**
* Set the line style to an empty object so that is initialized
* @param {Number} lineIndex
* @private
*/
_setLineStyle: function(lineIndex) {
this.styles[lineIndex] = {};
},
/**
* @param {Number} lineIndex
* @private
*/
_deleteLineStyle: function(lineIndex) {
delete this.styles[lineIndex];
}
});
})();
(function() {
function parseDecoration(object) {
if (object.textDecoration) {
object.textDecoration.indexOf('underline') > -1 && (object.underline = true);
object.textDecoration.indexOf('line-through') > -1 && (object.linethrough = true);
object.textDecoration.indexOf('overline') > -1 && (object.overline = true);
delete object.textDecoration;
}
}
/**
* IText class (introduced in <b>v1.4</b>) Events are also fired with "text:"
* prefix when observing canvas.
* @class fabric.IText
* @extends fabric.Text
* @mixes fabric.Observable
*
* @fires changed
* @fires selection:changed
* @fires editing:entered
* @fires editing:exited
*
* @return {fabric.IText} thisArg
* @see {@link fabric.IText#initialize} for constructor definition
*
* <p>Supported key combinations:</p>
* <pre>
* Move cursor: left, right, up, down
* Select character: shift + left, shift + right
* Select text vertically: shift + up, shift + down
* Move cursor by word: alt + left, alt + right
* Select words: shift + alt + left, shift + alt + right
* Move cursor to line start/end: cmd + left, cmd + right or home, end
* Select till start/end of line: cmd + shift + left, cmd + shift + right or shift + home, shift + end
* Jump to start/end of text: cmd + up, cmd + down
* Select till start/end of text: cmd + shift + up, cmd + shift + down or shift + pgUp, shift + pgDown
* Delete character: backspace
* Delete word: alt + backspace
* Delete line: cmd + backspace
* Forward delete: delete
* Copy text: ctrl/cmd + c
* Paste text: ctrl/cmd + v
* Cut text: ctrl/cmd + x
* Select entire text: ctrl/cmd + a
* Quit editing tab or esc
* </pre>
*
* <p>Supported mouse/touch combination</p>
* <pre>
* Position cursor: click/touch
* Create selection: click/touch & drag
* Create selection: click & shift + click
* Select word: double click
* Select line: triple click
* </pre>
*/
fabric.IText = fabric.util.createClass(fabric.Text, fabric.Observable, /** @lends fabric.IText.prototype */ {
/**
* Type of an object
* @type String
* @default
*/
type: 'i-text',
/**
* Index where text selection starts (or where cursor is when there is no selection)
* @type Number
* @default
*/
selectionStart: 0,
/**
* Index where text selection ends
* @type Number
* @default
*/
selectionEnd: 0,
/**
* Color of text selection
* @type String
* @default
*/
selectionColor: 'rgba(17,119,255,0.3)',
/**
* Indicates whether text is in editing mode
* @type Boolean
* @default
*/
isEditing: false,
/**
* Indicates whether a text can be edited
* @type Boolean
* @default
*/
editable: true,
/**
* Border color of text object while it's in editing mode
* @type String
* @default
*/
editingBorderColor: 'rgba(102,153,255,0.25)',
/**
* Width of cursor (in px)
* @type Number
* @default
*/
cursorWidth: 2,
/**
* Color of default cursor (when not overwritten by character style)
* @type String
* @default
*/
cursorColor: '#333',
/**
* Delay between cursor blink (in ms)
* @type Number
* @default
*/
cursorDelay: 1000,
/**
* Duration of cursor fadein (in ms)
* @type Number
* @default
*/
cursorDuration: 600,
/**
* Indicates whether internal text char widths can be cached
* @type Boolean
* @default
*/
caching: true,
/**
* @private
*/
_reSpace: /\s|\n/,
/**
* @private
*/
_currentCursorOpacity: 0,
/**
* @private
*/
_selectionDirection: null,
/**
* @private
*/
_abortCursorAnimation: false,
/**
* @private
*/
__widthOfSpace: [],
/**
* Helps determining when the text is in composition, so that the cursor
* rendering is altered.
*/
inCompositionMode: false,
/**
* Constructor
* @param {String} text Text string
* @param {Object} [options] Options object
* @return {fabric.IText} thisArg
*/
initialize: function(text, options) {
this.callSuper('initialize', text, options);
this.initBehavior();
},
/**
* Sets selection start (left boundary of a selection)
* @param {Number} index Index to set selection start to
*/
setSelectionStart: function(index) {
index = Math.max(index, 0);
this._updateAndFire('selectionStart', index);
},
/**
* Sets selection end (right boundary of a selection)
* @param {Number} index Index to set selection end to
*/
setSelectionEnd: function(index) {
index = Math.min(index, this.text.length);
this._updateAndFire('selectionEnd', index);
},
/**
* @private
* @param {String} property 'selectionStart' or 'selectionEnd'
* @param {Number} index new position of property
*/
_updateAndFire: function(property, index) {
if (this[property] !== index) {
this._fireSelectionChanged();
this[property] = index;
}
this._updateTextarea();
},
/**
* Fires the even of selection changed
* @private
*/
_fireSelectionChanged: function() {
this.fire('selection:changed');
this.canvas && this.canvas.fire('text:selection:changed', { target: this });
},
/**
* Initialize text dimensions. Render all text on given context
* or on a offscreen canvas to get the text width with measureText.
* Updates this.width and this.height with the proper values.
* Does not return dimensions.
* @private
*/
initDimensions: function() {
this.isEditing && this.initDelayedCursor();
this.clearContextTop();
this.callSuper('initDimensions');
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
render: function(ctx) {
this.clearContextTop();
this.callSuper('render', ctx);
// clear the cursorOffsetCache, so we ensure to calculate once per renderCursor
// the correct position but not at every cursor animation.
this.cursorOffsetCache = { };
this.renderCursorOrSelection();
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_render: function(ctx) {
this.callSuper('_render', ctx);
},
/**
* Prepare and clean the contextTop
*/
clearContextTop: function(skipRestore) {
if (!this.isEditing || !this.canvas || !this.canvas.contextTop) {
return;
}
var ctx = this.canvas.contextTop, v = this.canvas.viewportTransform;
ctx.save();
ctx.transform(v[0], v[1], v[2], v[3], v[4], v[5]);
this.transform(ctx);
this.transformMatrix && ctx.transform.apply(ctx, this.transformMatrix);
this._clearTextArea(ctx);
skipRestore || ctx.restore();
},
/**
* Renders cursor or selection (depending on what exists)
* it does on the contextTop. If contextTop is not available, do nothing.
*/
renderCursorOrSelection: function() {
if (!this.isEditing || !this.canvas || !this.canvas.contextTop) {
return;
}
var boundaries = this._getCursorBoundaries(),
ctx = this.canvas.contextTop;
this.clearContextTop(true);
if (this.selectionStart === this.selectionEnd) {
this.renderCursor(boundaries, ctx);
}
else {
this.renderSelection(boundaries, ctx);
}
ctx.restore();
},
_clearTextArea: function(ctx) {
// we add 4 pixel, to be sure to do not leave any pixel out
var width = this.width + 4, height = this.height + 4;
ctx.clearRect(-width / 2, -height / 2, width, height);
},
/**
* Returns cursor boundaries (left, top, leftOffset, topOffset)
* @private
* @param {Array} chars Array of characters
* @param {String} typeOfBoundaries
*/
_getCursorBoundaries: function(position) {
// left/top are left/top of entire text box
// leftOffset/topOffset are offset from that left/top point of a text box
if (typeof position === 'undefined') {
position = this.selectionStart;
}
var left = this._getLeftOffset(),
top = this._getTopOffset(),
offsets = this._getCursorBoundariesOffsets(position);
return {
left: left,
top: top,
leftOffset: offsets.left,
topOffset: offsets.top
};
},
/**
* @private
*/
_getCursorBoundariesOffsets: function(position) {
if (this.cursorOffsetCache && 'top' in this.cursorOffsetCache) {
return this.cursorOffsetCache;
}
var lineLeftOffset,
lineIndex,
charIndex,
topOffset = 0,
leftOffset = 0,
boundaries,
cursorPosition = this.get2DCursorLocation(position);
charIndex = cursorPosition.charIndex;
lineIndex = cursorPosition.lineIndex;
for (var i = 0; i < lineIndex; i++) {
topOffset += this.getHeightOfLine(i);
}
lineLeftOffset = this._getLineLeftOffset(lineIndex);
var bound = this.__charBounds[lineIndex][charIndex];
bound && (leftOffset = bound.left);
if (this.charSpacing !== 0 && charIndex === this._textLines[lineIndex].length) {
leftOffset -= this._getWidthOfCharSpacing();
}
boundaries = {
top: topOffset,
left: lineLeftOffset + (leftOffset > 0 ? leftOffset : 0),
};
this.cursorOffsetCache = boundaries;
return this.cursorOffsetCache;
},
/**
* Renders cursor
* @param {Object} boundaries
* @param {CanvasRenderingContext2D} ctx transformed context to draw on
*/
renderCursor: function(boundaries, ctx) {
var cursorLocation = this.get2DCursorLocation(),
lineIndex = cursorLocation.lineIndex,
charIndex = cursorLocation.charIndex > 0 ? cursorLocation.charIndex - 1 : 0,
charHeight = this.getValueOfPropertyAt(lineIndex, charIndex, 'fontSize'),
multiplier = this.scaleX * this.canvas.getZoom(),
cursorWidth = this.cursorWidth / multiplier,
topOffset = boundaries.topOffset,
dy = this.getValueOfPropertyAt(lineIndex, charIndex, 'deltaY');
topOffset += (1 - this._fontSizeFraction) * this.getHeightOfLine(lineIndex) / this.lineHeight
- charHeight * (1 - this._fontSizeFraction);
if (this.inCompositionMode) {
this.renderSelection(boundaries, ctx);
}
ctx.fillStyle = this.getValueOfPropertyAt(lineIndex, charIndex, 'fill');
ctx.globalAlpha = this.__isMousedown ? 1 : this._currentCursorOpacity;
ctx.fillRect(
boundaries.left + boundaries.leftOffset - cursorWidth / 2,
topOffset + boundaries.top + dy,
cursorWidth,
charHeight);
},
/**
* Renders text selection
* @param {Object} boundaries Object with left/top/leftOffset/topOffset
* @param {CanvasRenderingContext2D} ctx transformed context to draw on
*/
renderSelection: function(boundaries, ctx) {
var selectionStart = this.inCompositionMode ? this.hiddenTextarea.selectionStart : this.selectionStart,
selectionEnd = this.inCompositionMode ? this.hiddenTextarea.selectionEnd : this.selectionEnd,
isJustify = this.textAlign.indexOf('justify') !== -1,
start = this.get2DCursorLocation(selectionStart),
end = this.get2DCursorLocation(selectionEnd),
startLine = start.lineIndex,
endLine = end.lineIndex,
startChar = start.charIndex < 0 ? 0 : start.charIndex,
endChar = end.charIndex < 0 ? 0 : end.charIndex;
for (var i = startLine; i <= endLine; i++) {
var lineOffset = this._getLineLeftOffset(i) || 0,
lineHeight = this.getHeightOfLine(i),
realLineHeight = 0, boxStart = 0, boxEnd = 0;
if (i === startLine) {
boxStart = this.__charBounds[startLine][startChar].left;
}
if (i >= startLine && i < endLine) {
boxEnd = isJustify && !this.isEndOfWrapping(i) ? this.width : this.getLineWidth(i) || 5; // WTF is this 5?
}
else if (i === endLine) {
if (endChar === 0) {
boxEnd = this.__charBounds[endLine][endChar].left;
}
else {
var charSpacing = this._getWidthOfCharSpacing();
boxEnd = this.__charBounds[endLine][endChar - 1].left
+ this.__charBounds[endLine][endChar - 1].width - charSpacing;
}
}
realLineHeight = lineHeight;
if (this.lineHeight < 1 || (i === endLine && this.lineHeight > 1)) {
lineHeight /= this.lineHeight;
}
if (this.inCompositionMode) {
ctx.fillStyle = this.compositionColor || 'black';
ctx.fillRect(
boundaries.left + lineOffset + boxStart,
boundaries.top + boundaries.topOffset + lineHeight,
boxEnd - boxStart,
1);
}
else {
ctx.fillStyle = this.selectionColor;
ctx.fillRect(
boundaries.left + lineOffset + boxStart,
boundaries.top + boundaries.topOffset,
boxEnd - boxStart,
lineHeight);
}
boundaries.topOffset += realLineHeight;
}
},
/**
* High level function to know the height of the cursor.
* the currentChar is the one that precedes the cursor
* Returns fontSize of char at the current cursor
* @return {Number} Character font size
*/
getCurrentCharFontSize: function() {
var cp = this._getCurrentCharIndex();
return this.getValueOfPropertyAt(cp.l, cp.c, 'fontSize');
},
/**
* High level function to know the color of the cursor.
* the currentChar is the one that precedes the cursor
* Returns color (fill) of char at the current cursor
* @return {String} Character color (fill)
*/
getCurrentCharColor: function() {
var cp = this._getCurrentCharIndex();
return this.getValueOfPropertyAt(cp.l, cp.c, 'fill');
},
/**
* Returns the cursor position for the getCurrent.. functions
* @private
*/
_getCurrentCharIndex: function() {
var cursorPosition = this.get2DCursorLocation(this.selectionStart, true),
charIndex = cursorPosition.charIndex > 0 ? cursorPosition.charIndex - 1 : 0;
return { l: cursorPosition.lineIndex, c: charIndex };
}
});
/**
* Returns fabric.IText instance from an object representation
* @static
* @memberOf fabric.IText
* @param {Object} object Object to create an instance from
* @param {function} [callback] invoked with new instance as argument
*/
fabric.IText.fromObject = function(object, callback) {
parseDecoration(object);
if (object.styles) {
for (var i in object.styles) {
for (var j in object.styles[i]) {
parseDecoration(object.styles[i][j]);
}
}
}
fabric.Object._fromObject('IText', object, callback, 'text');
};
})();
(function() {
var clone = fabric.util.object.clone;
fabric.util.object.extend(fabric.IText.prototype, /** @lends fabric.IText.prototype */ {
/**
* Initializes all the interactive behavior of IText
*/
initBehavior: function() {
this.initAddedHandler();
this.initRemovedHandler();
this.initCursorSelectionHandlers();
this.initDoubleClickSimulation();
this.mouseMoveHandler = this.mouseMoveHandler.bind(this);
},
onDeselect: function() {
this.isEditing && this.exitEditing();
this.selected = false;
},
/**
* Initializes "added" event handler
*/
initAddedHandler: function() {
var _this = this;
this.on('added', function() {
var canvas = _this.canvas;
if (canvas) {
if (!canvas._hasITextHandlers) {
canvas._hasITextHandlers = true;
_this._initCanvasHandlers(canvas);
}
canvas._iTextInstances = canvas._iTextInstances || [];
canvas._iTextInstances.push(_this);
}
});
},
initRemovedHandler: function() {
var _this = this;
this.on('removed', function() {
var canvas = _this.canvas;
if (canvas) {
canvas._iTextInstances = canvas._iTextInstances || [];
fabric.util.removeFromArray(canvas._iTextInstances, _this);
if (canvas._iTextInstances.length === 0) {
canvas._hasITextHandlers = false;
_this._removeCanvasHandlers(canvas);
}
}
});
},
/**
* register canvas event to manage exiting on other instances
* @private
*/
_initCanvasHandlers: function(canvas) {
canvas._mouseUpITextHandler = function() {
if (canvas._iTextInstances) {
canvas._iTextInstances.forEach(function(obj) {
obj.__isMousedown = false;
});
}
};
canvas.on('mouse:up', canvas._mouseUpITextHandler);
},
/**
* remove canvas event to manage exiting on other instances
* @private
*/
_removeCanvasHandlers: function(canvas) {
canvas.off('mouse:up', canvas._mouseUpITextHandler);
},
/**
* @private
*/
_tick: function() {
this._currentTickState = this._animateCursor(this, 1, this.cursorDuration, '_onTickComplete');
},
/**
* @private
*/
_animateCursor: function(obj, targetOpacity, duration, completeMethod) {
var tickState;
tickState = {
isAborted: false,
abort: function() {
this.isAborted = true;
},
};
obj.animate('_currentCursorOpacity', targetOpacity, {
duration: duration,
onComplete: function() {
if (!tickState.isAborted) {
obj[completeMethod]();
}
},
onChange: function() {
// we do not want to animate a selection, only cursor
if (obj.canvas && obj.selectionStart === obj.selectionEnd) {
obj.renderCursorOrSelection();
}
},
abort: function() {
return tickState.isAborted;
}
});
return tickState;
},
/**
* @private
*/
_onTickComplete: function() {
var _this = this;
if (this._cursorTimeout1) {
clearTimeout(this._cursorTimeout1);
}
this._cursorTimeout1 = setTimeout(function() {
_this._currentTickCompleteState = _this._animateCursor(_this, 0, this.cursorDuration / 2, '_tick');
}, 100);
},
/**
* Initializes delayed cursor
*/
initDelayedCursor: function(restart) {
var _this = this,
delay = restart ? 0 : this.cursorDelay;
this.abortCursorAnimation();
this._currentCursorOpacity = 1;
this._cursorTimeout2 = setTimeout(function() {
_this._tick();
}, delay);
},
/**
* Aborts cursor animation and clears all timeouts
*/
abortCursorAnimation: function() {
var shouldClear = this._currentTickState || this._currentTickCompleteState,
canvas = this.canvas;
this._currentTickState && this._currentTickState.abort();
this._currentTickCompleteState && this._currentTickCompleteState.abort();
clearTimeout(this._cursorTimeout1);
clearTimeout(this._cursorTimeout2);
this._currentCursorOpacity = 0;
// to clear just itext area we need to transform the context
// it may not be worth it
if (shouldClear && canvas) {
canvas.clearContext(canvas.contextTop || canvas.contextContainer);
}
},
/**
* Selects entire text
* @return {fabric.IText} thisArg
* @chainable
*/
selectAll: function() {
this.selectionStart = 0;
this.selectionEnd = this._text.length;
this._fireSelectionChanged();
this._updateTextarea();
return this;
},
/**
* Returns selected text
* @return {String}
*/
getSelectedText: function() {
return this._text.slice(this.selectionStart, this.selectionEnd).join('');
},
/**
* Find new selection index representing start of current word according to current selection index
* @param {Number} startFrom Current selection index
* @return {Number} New selection index
*/
findWordBoundaryLeft: function(startFrom) {
var offset = 0, index = startFrom - 1;
// remove space before cursor first
if (this._reSpace.test(this._text[index])) {
while (this._reSpace.test(this._text[index])) {
offset++;
index--;
}
}
while (/\S/.test(this._text[index]) && index > -1) {
offset++;
index--;
}
return startFrom - offset;
},
/**
* Find new selection index representing end of current word according to current selection index
* @param {Number} startFrom Current selection index
* @return {Number} New selection index
*/
findWordBoundaryRight: function(startFrom) {
var offset = 0, index = startFrom;
// remove space after cursor first
if (this._reSpace.test(this._text[index])) {
while (this._reSpace.test(this._text[index])) {
offset++;
index++;
}
}
while (/\S/.test(this._text[index]) && index < this._text.length) {
offset++;
index++;
}
return startFrom + offset;
},
/**
* Find new selection index representing start of current line according to current selection index
* @param {Number} startFrom Current selection index
* @return {Number} New selection index
*/
findLineBoundaryLeft: function(startFrom) {
var offset = 0, index = startFrom - 1;
while (!/\n/.test(this._text[index]) && index > -1) {
offset++;
index--;
}
return startFrom - offset;
},
/**
* Find new selection index representing end of current line according to current selection index
* @param {Number} startFrom Current selection index
* @return {Number} New selection index
*/
findLineBoundaryRight: function(startFrom) {
var offset = 0, index = startFrom;
while (!/\n/.test(this._text[index]) && index < this._text.length) {
offset++;
index++;
}
return startFrom + offset;
},
/**
* Finds index corresponding to beginning or end of a word
* @param {Number} selectionStart Index of a character
* @param {Number} direction 1 or -1
* @return {Number} Index of the beginning or end of a word
*/
searchWordBoundary: function(selectionStart, direction) {
var index = this._reSpace.test(this._text[selectionStart]) ? selectionStart - 1 : selectionStart,
_char = this._text[index],
reNonWord = /[ \n\.,;!\?\-]/;
while (!reNonWord.test(_char) && index > 0 && index < this._text.length) {
index += direction;
_char = this._text[index];
}
if (reNonWord.test(_char) && _char !== '\n') {
index += direction === 1 ? 0 : 1;
}
return index;
},
/**
* Selects a word based on the index
* @param {Number} selectionStart Index of a character
*/
selectWord: function(selectionStart) {
selectionStart = selectionStart || this.selectionStart;
var newSelectionStart = this.searchWordBoundary(selectionStart, -1), /* search backwards */
newSelectionEnd = this.searchWordBoundary(selectionStart, 1); /* search forward */
this.selectionStart = newSelectionStart;
this.selectionEnd = newSelectionEnd;
this._fireSelectionChanged();
this._updateTextarea();
this.renderCursorOrSelection();
},
/**
* Selects a line based on the index
* @param {Number} selectionStart Index of a character
* @return {fabric.IText} thisArg
* @chainable
*/
selectLine: function(selectionStart) {
selectionStart = selectionStart || this.selectionStart;
var newSelectionStart = this.findLineBoundaryLeft(selectionStart),
newSelectionEnd = this.findLineBoundaryRight(selectionStart);
this.selectionStart = newSelectionStart;
this.selectionEnd = newSelectionEnd;
this._fireSelectionChanged();
this._updateTextarea();
return this;
},
/**
* Enters editing state
* @return {fabric.IText} thisArg
* @chainable
*/
enterEditing: function(e) {
if (this.isEditing || !this.editable) {
return;
}
if (this.canvas) {
this.canvas.calcOffset();
this.exitEditingOnOthers(this.canvas);
}
this.isEditing = true;
this.initHiddenTextarea(e);
this.hiddenTextarea.focus();
this.hiddenTextarea.value = this.text;
this._updateTextarea();
this._saveEditingProps();
this._setEditingProps();
this._textBeforeEdit = this.text;
this._tick();
this.fire('editing:entered');
this._fireSelectionChanged();
if (!this.canvas) {
return this;
}
this.canvas.fire('text:editing:entered', { target: this });
this.initMouseMoveHandler();
this.canvas.requestRenderAll();
return this;
},
exitEditingOnOthers: function(canvas) {
if (canvas._iTextInstances) {
canvas._iTextInstances.forEach(function(obj) {
obj.selected = false;
if (obj.isEditing) {
obj.exitEditing();
}
});
}
},
/**
* Initializes "mousemove" event handler
*/
initMouseMoveHandler: function() {
this.canvas.on('mouse:move', this.mouseMoveHandler);
},
/**
* @private
*/
mouseMoveHandler: function(options) {
if (!this.__isMousedown || !this.isEditing) {
return;
}
var newSelectionStart = this.getSelectionStartFromPointer(options.e),
currentStart = this.selectionStart,
currentEnd = this.selectionEnd;
if (
(newSelectionStart !== this.__selectionStartOnMouseDown || currentStart === currentEnd)
&&
(currentStart === newSelectionStart || currentEnd === newSelectionStart)
) {
return;
}
if (newSelectionStart > this.__selectionStartOnMouseDown) {
this.selectionStart = this.__selectionStartOnMouseDown;
this.selectionEnd = newSelectionStart;
}
else {
this.selectionStart = newSelectionStart;
this.selectionEnd = this.__selectionStartOnMouseDown;
}
if (this.selectionStart !== currentStart || this.selectionEnd !== currentEnd) {
this.restartCursorIfNeeded();
this._fireSelectionChanged();
this._updateTextarea();
this.renderCursorOrSelection();
}
},
/**
* @private
*/
_setEditingProps: function() {
this.hoverCursor = 'text';
if (this.canvas) {
this.canvas.defaultCursor = this.canvas.moveCursor = 'text';
}
this.borderColor = this.editingBorderColor;
this.hasControls = this.selectable = false;
this.lockMovementX = this.lockMovementY = true;
},
/**
* convert from textarea to grapheme indexes
*/
fromStringToGraphemeSelection: function(start, end, text) {
var smallerTextStart = text.slice(0, start),
graphemeStart = fabric.util.string.graphemeSplit(smallerTextStart).length;
if (start === end) {
return { selectionStart: graphemeStart, selectionEnd: graphemeStart };
}
var smallerTextEnd = text.slice(start, end),
graphemeEnd = fabric.util.string.graphemeSplit(smallerTextEnd).length;
return { selectionStart: graphemeStart, selectionEnd: graphemeStart + graphemeEnd };
},
/**
* convert from fabric to textarea values
*/
fromGraphemeToStringSelection: function(start, end, _text) {
var smallerTextStart = _text.slice(0, start),
graphemeStart = smallerTextStart.join('').length;
if (start === end) {
return { selectionStart: graphemeStart, selectionEnd: graphemeStart };
}
var smallerTextEnd = _text.slice(start, end),
graphemeEnd = smallerTextEnd.join('').length;
return { selectionStart: graphemeStart, selectionEnd: graphemeStart + graphemeEnd };
},
/**
* @private
*/
_updateTextarea: function() {
this.cursorOffsetCache = { };
if (!this.hiddenTextarea) {
return;
}
if (!this.inCompositionMode) {
var newSelection = this.fromGraphemeToStringSelection(this.selectionStart, this.selectionEnd, this._text);
this.hiddenTextarea.selectionStart = newSelection.selectionStart;
this.hiddenTextarea.selectionEnd = newSelection.selectionEnd;
}
this.updateTextareaPosition();
},
/**
* @private
*/
updateFromTextArea: function() {
if (!this.hiddenTextarea) {
return;
}
this.cursorOffsetCache = { };
this.text = this.hiddenTextarea.value;
if (this._shouldClearDimensionCache()) {
this.initDimensions();
this.setCoords();
}
var newSelection = this.fromStringToGraphemeSelection(
this.hiddenTextarea.selectionStart, this.hiddenTextarea.selectionEnd, this.hiddenTextarea.value);
this.selectionEnd = this.selectionStart = newSelection.selectionEnd;
if (!this.inCompositionMode) {
this.selectionStart = newSelection.selectionStart;
}
this.updateTextareaPosition();
},
/**
* @private
*/
updateTextareaPosition: function() {
if (this.selectionStart === this.selectionEnd) {
var style = this._calcTextareaPosition();
this.hiddenTextarea.style.left = style.left;
this.hiddenTextarea.style.top = style.top;
}
},
/**
* @private
* @return {Object} style contains style for hiddenTextarea
*/
_calcTextareaPosition: function() {
if (!this.canvas) {
return { x: 1, y: 1 };
}
var desiredPosition = this.inCompositionMode ? this.compositionStart : this.selectionStart,
boundaries = this._getCursorBoundaries(desiredPosition),
cursorLocation = this.get2DCursorLocation(desiredPosition),
lineIndex = cursorLocation.lineIndex,
charIndex = cursorLocation.charIndex,
charHeight = this.getValueOfPropertyAt(lineIndex, charIndex, 'fontSize') * this.lineHeight,
leftOffset = boundaries.leftOffset,
m = this.calcTransformMatrix(),
p = {
x: boundaries.left + leftOffset,
y: boundaries.top + boundaries.topOffset + charHeight
},
upperCanvas = this.canvas.upperCanvasEl,
upperCanvasWidth = upperCanvas.width,
upperCanvasHeight = upperCanvas.height,
maxWidth = upperCanvasWidth - charHeight,
maxHeight = upperCanvasHeight - charHeight,
scaleX = upperCanvas.clientWidth / upperCanvasWidth,
scaleY = upperCanvas.clientHeight / upperCanvasHeight;
p = fabric.util.transformPoint(p, m);
p = fabric.util.transformPoint(p, this.canvas.viewportTransform);
p.x *= scaleX;
p.y *= scaleY;
if (p.x < 0) {
p.x = 0;
}
if (p.x > maxWidth) {
p.x = maxWidth;
}
if (p.y < 0) {
p.y = 0;
}
if (p.y > maxHeight) {
p.y = maxHeight;
}
// add canvas offset on document
p.x += this.canvas._offset.left;
p.y += this.canvas._offset.top;
return { left: p.x + 'px', top: p.y + 'px', fontSize: charHeight + 'px', charHeight: charHeight };
},
/**
* @private
*/
_saveEditingProps: function() {
this._savedProps = {
hasControls: this.hasControls,
borderColor: this.borderColor,
lockMovementX: this.lockMovementX,
lockMovementY: this.lockMovementY,
hoverCursor: this.hoverCursor,
selectable: this.selectable,
defaultCursor: this.canvas && this.canvas.defaultCursor,
moveCursor: this.canvas && this.canvas.moveCursor
};
},
/**
* @private
*/
_restoreEditingProps: function() {
if (!this._savedProps) {
return;
}
this.hoverCursor = this._savedProps.hoverCursor;
this.hasControls = this._savedProps.hasControls;
this.borderColor = this._savedProps.borderColor;
this.selectable = this._savedProps.selectable;
this.lockMovementX = this._savedProps.lockMovementX;
this.lockMovementY = this._savedProps.lockMovementY;
if (this.canvas) {
this.canvas.defaultCursor = this._savedProps.defaultCursor;
this.canvas.moveCursor = this._savedProps.moveCursor;
}
},
/**
* Exits from editing state
* @return {fabric.IText} thisArg
* @chainable
*/
exitEditing: function() {
var isTextChanged = (this._textBeforeEdit !== this.text);
this.selected = false;
this.isEditing = false;
this.selectionEnd = this.selectionStart;
if (this.hiddenTextarea) {
this.hiddenTextarea.blur && this.hiddenTextarea.blur();
this.canvas && this.hiddenTextarea.parentNode.removeChild(this.hiddenTextarea);
this.hiddenTextarea = null;
}
this.abortCursorAnimation();
this._restoreEditingProps();
this._currentCursorOpacity = 0;
if (this._shouldClearDimensionCache()) {
this.initDimensions();
this.setCoords();
}
this.fire('editing:exited');
isTextChanged && this.fire('modified');
if (this.canvas) {
this.canvas.off('mouse:move', this.mouseMoveHandler);
this.canvas.fire('text:editing:exited', { target: this });
isTextChanged && this.canvas.fire('object:modified', { target: this });
}
return this;
},
/**
* @private
*/
_removeExtraneousStyles: function() {
for (var prop in this.styles) {
if (!this._textLines[prop]) {
delete this.styles[prop];
}
}
},
/**
* remove and reflow a style block from start to end.
* @param {Number} start linear start position for removal (included in removal)
* @param {Number} end linear end position for removal ( excluded from removal )
*/
removeStyleFromTo: function(start, end) {
var cursorStart = this.get2DCursorLocation(start, true),
cursorEnd = this.get2DCursorLocation(end, true),
lineStart = cursorStart.lineIndex,
charStart = cursorStart.charIndex,
lineEnd = cursorEnd.lineIndex,
charEnd = cursorEnd.charIndex,
i, styleObj;
if (lineStart !== lineEnd) {
// step1 remove the trailing of lineStart
if (this.styles[lineStart]) {
for (i = charStart; i < this._unwrappedTextLines[lineStart].length; i++) {
delete this.styles[lineStart][i];
}
}
// step2 move the trailing of lineEnd to lineStart if needed
if (this.styles[lineEnd]) {
for (i = charEnd; i < this._unwrappedTextLines[lineEnd].length; i++) {
styleObj = this.styles[lineEnd][i];
if (styleObj) {
this.styles[lineStart] || (this.styles[lineStart] = { });
this.styles[lineStart][charStart + i - charEnd] = styleObj;
}
}
}
// step3 detects lines will be completely removed.
for (i = lineStart + 1; i <= lineEnd; i++) {
delete this.styles[i];
}
// step4 shift remaining lines.
this.shiftLineStyles(lineEnd, lineStart - lineEnd);
}
else {
// remove and shift left on the same line
if (this.styles[lineStart]) {
styleObj = this.styles[lineStart];
var diff = charEnd - charStart, numericChar, _char;
for (i = charStart; i < charEnd; i++) {
delete styleObj[i];
}
for (_char in this.styles[lineStart]) {
numericChar = parseInt(_char, 10);
if (numericChar >= charEnd) {
styleObj[numericChar - diff] = styleObj[_char];
delete styleObj[_char];
}
}
}
}
},
/**
* Shifts line styles up or down
* @param {Number} lineIndex Index of a line
* @param {Number} offset Can any number?
*/
shiftLineStyles: function(lineIndex, offset) {
// shift all line styles by offset upward or downward
// do not clone deep. we need new array, not new style objects
var clonedStyles = clone(this.styles);
for (var line in this.styles) {
var numericLine = parseInt(line, 10);
if (numericLine > lineIndex) {
this.styles[numericLine + offset] = clonedStyles[numericLine];
if (!clonedStyles[numericLine - offset]) {
delete this.styles[numericLine];
}
}
}
},
restartCursorIfNeeded: function() {
if (!this._currentTickState || this._currentTickState.isAborted
|| !this._currentTickCompleteState || this._currentTickCompleteState.isAborted
) {
this.initDelayedCursor();
}
},
/**
* Inserts new style object
* @param {Number} lineIndex Index of a line
* @param {Number} charIndex Index of a char
* @param {Number} qty number of lines to add
* @param {Array} copiedStyle Array of objects styles
*/
insertNewlineStyleObject: function(lineIndex, charIndex, qty, copiedStyle) {
var currentCharStyle,
newLineStyles = {},
somethingAdded = false;
qty || (qty = 1);
this.shiftLineStyles(lineIndex, qty);
if (this.styles[lineIndex]) {
currentCharStyle = this.styles[lineIndex][charIndex === 0 ? charIndex : charIndex - 1];
}
// we clone styles of all chars
// after cursor onto the current line
for (var index in this.styles[lineIndex]) {
var numIndex = parseInt(index, 10);
if (numIndex >= charIndex) {
somethingAdded = true;
newLineStyles[numIndex - charIndex] = this.styles[lineIndex][index];
// remove lines from the previous line since they're on a new line now
delete this.styles[lineIndex][index];
}
}
if (somethingAdded) {
this.styles[lineIndex + qty] = newLineStyles;
}
else {
delete this.styles[lineIndex + qty];
}
// for the other lines
// we clone current char style onto the next (otherwise empty) line
while (qty > 1) {
qty--;
if (copiedStyle && copiedStyle[qty]) {
this.styles[lineIndex + qty] = { 0: clone(copiedStyle[qty]) };
}
else if (currentCharStyle) {
this.styles[lineIndex + qty] = { 0: clone(currentCharStyle) };
}
else {
delete this.styles[lineIndex + qty];
}
}
this._forceClearCache = true;
},
/**
* Inserts style object for a given line/char index
* @param {Number} lineIndex Index of a line
* @param {Number} charIndex Index of a char
* @param {Number} quantity number Style object to insert, if given
* @param {Array} copiedStyle array of style objects
*/
insertCharStyleObject: function(lineIndex, charIndex, quantity, copiedStyle) {
if (!this.styles) {
this.styles = {};
}
var currentLineStyles = this.styles[lineIndex],
currentLineStylesCloned = currentLineStyles ? clone(currentLineStyles) : {};
quantity || (quantity = 1);
// shift all char styles by quantity forward
// 0,1,2,3 -> (charIndex=2) -> 0,1,3,4 -> (insert 2) -> 0,1,2,3,4
for (var index in currentLineStylesCloned) {
var numericIndex = parseInt(index, 10);
if (numericIndex >= charIndex) {
currentLineStyles[numericIndex + quantity] = currentLineStylesCloned[numericIndex];
// only delete the style if there was nothing moved there
if (!currentLineStylesCloned[numericIndex - quantity]) {
delete currentLineStyles[numericIndex];
}
}
}
this._forceClearCache = true;
if (copiedStyle) {
while (quantity--) {
if (!Object.keys(copiedStyle[quantity]).length) {
continue;
}
if (!this.styles[lineIndex]) {
this.styles[lineIndex] = {};
}
this.styles[lineIndex][charIndex + quantity] = clone(copiedStyle[quantity]);
}
return;
}
if (!currentLineStyles) {
return;
}
var newStyle = currentLineStyles[charIndex ? charIndex - 1 : 1];
while (newStyle && quantity--) {
this.styles[lineIndex][charIndex + quantity] = clone(newStyle);
}
},
/**
* Inserts style object(s)
* @param {Array} insertedText Characters at the location where style is inserted
* @param {Number} start cursor index for inserting style
* @param {Array} [copiedStyle] array of style objects to insert.
*/
insertNewStyleBlock: function(insertedText, start, copiedStyle) {
var cursorLoc = this.get2DCursorLocation(start, true),
addedLines = [0], linesLength = 0;
for (var i = 0; i < insertedText.length; i++) {
if (insertedText[i] === '\n') {
linesLength++;
addedLines[linesLength] = 0;
}
else {
addedLines[linesLength]++;
}
}
if (addedLines[0] > 0) {
this.insertCharStyleObject(cursorLoc.lineIndex, cursorLoc.charIndex, addedLines[0], copiedStyle);
copiedStyle = copiedStyle && copiedStyle.slice(addedLines[0] + 1);
}
linesLength && this.insertNewlineStyleObject(
cursorLoc.lineIndex, cursorLoc.charIndex + addedLines[0], linesLength);
for (var i = 1; i < linesLength; i++) {
if (addedLines[i] > 0) {
this.insertCharStyleObject(cursorLoc.lineIndex + i, 0, addedLines[i], copiedStyle);
}
else if (copiedStyle) {
this.styles[cursorLoc.lineIndex + i][0] = copiedStyle[0];
}
copiedStyle = copiedStyle && copiedStyle.slice(addedLines[i] + 1);
}
// we use i outside the loop to get it like linesLength
if (addedLines[i] > 0) {
this.insertCharStyleObject(cursorLoc.lineIndex + i, 0, addedLines[i], copiedStyle);
}
},
/**
* Set the selectionStart and selectionEnd according to the new position of cursor
* mimic the key - mouse navigation when shift is pressed.
*/
setSelectionStartEndWithShift: function(start, end, newSelection) {
if (newSelection <= start) {
if (end === start) {
this._selectionDirection = 'left';
}
else if (this._selectionDirection === 'right') {
this._selectionDirection = 'left';
this.selectionEnd = start;
}
this.selectionStart = newSelection;
}
else if (newSelection > start && newSelection < end) {
if (this._selectionDirection === 'right') {
this.selectionEnd = newSelection;
}
else {
this.selectionStart = newSelection;
}
}
else {
// newSelection is > selection start and end
if (end === start) {
this._selectionDirection = 'right';
}
else if (this._selectionDirection === 'left') {
this._selectionDirection = 'right';
this.selectionStart = end;
}
this.selectionEnd = newSelection;
}
},
setSelectionInBoundaries: function() {
var length = this.text.length;
if (this.selectionStart > length) {
this.selectionStart = length;
}
else if (this.selectionStart < 0) {
this.selectionStart = 0;
}
if (this.selectionEnd > length) {
this.selectionEnd = length;
}
else if (this.selectionEnd < 0) {
this.selectionEnd = 0;
}
}
});
})();
fabric.util.object.extend(fabric.IText.prototype, /** @lends fabric.IText.prototype */ {
/**
* Initializes "dbclick" event handler
*/
initDoubleClickSimulation: function() {
// for double click
this.__lastClickTime = +new Date();
// for triple click
this.__lastLastClickTime = +new Date();
this.__lastPointer = { };
this.on('mousedown', this.onMouseDown);
},
/**
* Default event handler to simulate triple click
* @private
*/
onMouseDown: function(options) {
if (!this.canvas) {
return;
}
this.__newClickTime = +new Date();
var newPointer = options.pointer;
if (this.isTripleClick(newPointer)) {
this.fire('tripleclick', options);
this._stopEvent(options.e);
}
this.__lastLastClickTime = this.__lastClickTime;
this.__lastClickTime = this.__newClickTime;
this.__lastPointer = newPointer;
this.__lastIsEditing = this.isEditing;
this.__lastSelected = this.selected;
},
isTripleClick: function(newPointer) {
return this.__newClickTime - this.__lastClickTime < 500 &&
this.__lastClickTime - this.__lastLastClickTime < 500 &&
this.__lastPointer.x === newPointer.x &&
this.__lastPointer.y === newPointer.y;
},
/**
* @private
*/
_stopEvent: function(e) {
e.preventDefault && e.preventDefault();
e.stopPropagation && e.stopPropagation();
},
/**
* Initializes event handlers related to cursor or selection
*/
initCursorSelectionHandlers: function() {
this.initMousedownHandler();
this.initMouseupHandler();
this.initClicks();
},
/**
* Initializes double and triple click event handlers
*/
initClicks: function() {
this.on('mousedblclick', function(options) {
this.selectWord(this.getSelectionStartFromPointer(options.e));
});
this.on('tripleclick', function(options) {
this.selectLine(this.getSelectionStartFromPointer(options.e));
});
},
/**
* Default event handler for the basic functionalities needed on _mouseDown
* can be overridden to do something different.
* Scope of this implementation is: find the click position, set selectionStart
* find selectionEnd, initialize the drawing of either cursor or selection area
*/
_mouseDownHandler: function(options) {
if (!this.canvas || !this.editable || (options.e.button && options.e.button !== 1)) {
return;
}
this.__isMousedown = true;
if (this.selected) {
this.setCursorByClick(options.e);
}
if (this.isEditing) {
this.__selectionStartOnMouseDown = this.selectionStart;
if (this.selectionStart === this.selectionEnd) {
this.abortCursorAnimation();
}
this.renderCursorOrSelection();
}
},
/**
* Default event handler for the basic functionalities needed on mousedown:before
* can be overridden to do something different.
* Scope of this implementation is: verify the object is already selected when mousing down
*/
_mouseDownHandlerBefore: function(options) {
if (!this.canvas || !this.editable || (options.e.button && options.e.button !== 1)) {
return;
}
if (this === this.canvas._activeObject) {
this.selected = true;
}
},
/**
* Initializes "mousedown" event handler
*/
initMousedownHandler: function() {
this.on('mousedown', this._mouseDownHandler);
this.on('mousedown:before', this._mouseDownHandlerBefore);
},
/**
* Initializes "mouseup" event handler
*/
initMouseupHandler: function() {
this.on('mouseup', this.mouseUpHandler);
},
/**
* standard hander for mouse up, overridable
* @private
*/
mouseUpHandler: function(options) {
this.__isMousedown = false;
if (!this.editable || this.group ||
(options.transform && options.transform.actionPerformed) ||
(options.e.button && options.e.button !== 1)) {
return;
}
if (this.canvas) {
var currentActive = this.canvas._activeObject;
if (currentActive && currentActive !== this) {
// avoid running this logic when there is an active object
// this because is possible with shift click and fast clicks,
// to rapidly deselect and reselect this object and trigger an enterEdit
return;
}
}
if (this.__lastSelected && !this.__corner) {
this.selected = false;
this.__lastSelected = false;
this.enterEditing(options.e);
if (this.selectionStart === this.selectionEnd) {
this.initDelayedCursor(true);
}
else {
this.renderCursorOrSelection();
}
}
else {
this.selected = true;
}
},
/**
* Changes cursor location in a text depending on passed pointer (x/y) object
* @param {Event} e Event object
*/
setCursorByClick: function(e) {
var newSelection = this.getSelectionStartFromPointer(e),
start = this.selectionStart, end = this.selectionEnd;
if (e.shiftKey) {
this.setSelectionStartEndWithShift(start, end, newSelection);
}
else {
this.selectionStart = newSelection;
this.selectionEnd = newSelection;
}
if (this.isEditing) {
this._fireSelectionChanged();
this._updateTextarea();
}
},
/**
* Returns index of a character corresponding to where an object was clicked
* @param {Event} e Event object
* @return {Number} Index of a character
*/
getSelectionStartFromPointer: function(e) {
var mouseOffset = this.getLocalPointer(e),
prevWidth = 0,
width = 0,
height = 0,
charIndex = 0,
lineIndex = 0,
lineLeftOffset,
line;
for (var i = 0, len = this._textLines.length; i < len; i++) {
if (height <= mouseOffset.y) {
height += this.getHeightOfLine(i) * this.scaleY;
lineIndex = i;
if (i > 0) {
charIndex += this._textLines[i - 1].length + this.missingNewlineOffset(i - 1);
}
}
else {
break;
}
}
lineLeftOffset = this._getLineLeftOffset(lineIndex);
width = lineLeftOffset * this.scaleX;
line = this._textLines[lineIndex];
for (var j = 0, jlen = line.length; j < jlen; j++) {
prevWidth = width;
// i removed something about flipX here, check.
width += this.__charBounds[lineIndex][j].kernedWidth * this.scaleX;
if (width <= mouseOffset.x) {
charIndex++;
}
else {
break;
}
}
return this._getNewSelectionStartFromOffset(mouseOffset, prevWidth, width, charIndex, jlen);
},
/**
* @private
*/
_getNewSelectionStartFromOffset: function(mouseOffset, prevWidth, width, index, jlen) {
// we need Math.abs because when width is after the last char, the offset is given as 1, while is 0
var distanceBtwLastCharAndCursor = mouseOffset.x - prevWidth,
distanceBtwNextCharAndCursor = width - mouseOffset.x,
offset = distanceBtwNextCharAndCursor > distanceBtwLastCharAndCursor ||
distanceBtwNextCharAndCursor < 0 ? 0 : 1,
newSelectionStart = index + offset;
// if object is horizontally flipped, mirror cursor location from the end
if (this.flipX) {
newSelectionStart = jlen - newSelectionStart;
}
if (newSelectionStart > this._text.length) {
newSelectionStart = this._text.length;
}
return newSelectionStart;
}
});
fabric.util.object.extend(fabric.IText.prototype, /** @lends fabric.IText.prototype */ {
/**
* Initializes hidden textarea (needed to bring up keyboard in iOS)
*/
initHiddenTextarea: function() {
this.hiddenTextarea = fabric.document.createElement('textarea');
this.hiddenTextarea.setAttribute('autocapitalize', 'off');
this.hiddenTextarea.setAttribute('autocorrect', 'off');
this.hiddenTextarea.setAttribute('autocomplete', 'off');
this.hiddenTextarea.setAttribute('spellcheck', 'false');
this.hiddenTextarea.setAttribute('data-fabric-hiddentextarea', '');
this.hiddenTextarea.setAttribute('wrap', 'off');
var style = this._calcTextareaPosition();
// line-height: 1px; was removed from the style to fix this:
// https://bugs.chromium.org/p/chromium/issues/detail?id=870966
this.hiddenTextarea.style.cssText = 'position: absolute; top: ' + style.top +
'; left: ' + style.left + '; z-index: -999; opacity: 0; width: 1px; height: 1px; font-size: 1px;' +
' paddingｰtop: ' + style.fontSize + ';';
fabric.document.body.appendChild(this.hiddenTextarea);
fabric.util.addListener(this.hiddenTextarea, 'keydown', this.onKeyDown.bind(this));
fabric.util.addListener(this.hiddenTextarea, 'keyup', this.onKeyUp.bind(this));
fabric.util.addListener(this.hiddenTextarea, 'input', this.onInput.bind(this));
fabric.util.addListener(this.hiddenTextarea, 'copy', this.copy.bind(this));
fabric.util.addListener(this.hiddenTextarea, 'cut', this.copy.bind(this));
fabric.util.addListener(this.hiddenTextarea, 'paste', this.paste.bind(this));
fabric.util.addListener(this.hiddenTextarea, 'compositionstart', this.onCompositionStart.bind(this));
fabric.util.addListener(this.hiddenTextarea, 'compositionupdate', this.onCompositionUpdate.bind(this));
fabric.util.addListener(this.hiddenTextarea, 'compositionend', this.onCompositionEnd.bind(this));
if (!this._clickHandlerInitialized && this.canvas) {
fabric.util.addListener(this.canvas.upperCanvasEl, 'click', this.onClick.bind(this));
this._clickHandlerInitialized = true;
}
},
/**
* For functionalities on keyDown
* Map a special key to a function of the instance/prototype
* If you need different behaviour for ESC or TAB or arrows, you have to change
* this map setting the name of a function that you build on the fabric.Itext or
* your prototype.
* the map change will affect all Instances unless you need for only some text Instances
* in that case you have to clone this object and assign your Instance.
* this.keysMap = fabric.util.object.clone(this.keysMap);
* The function must be in fabric.Itext.prototype.myFunction And will receive event as args[0]
*/
keysMap: {
9: 'exitEditing',
27: 'exitEditing',
33: 'moveCursorUp',
34: 'moveCursorDown',
35: 'moveCursorRight',
36: 'moveCursorLeft',
37: 'moveCursorLeft',
38: 'moveCursorUp',
39: 'moveCursorRight',
40: 'moveCursorDown',
},
/**
* For functionalities on keyUp + ctrl || cmd
*/
ctrlKeysMapUp: {
67: 'copy',
88: 'cut'
},
/**
* For functionalities on keyDown + ctrl || cmd
*/
ctrlKeysMapDown: {
65: 'selectAll'
},
onClick: function() {
// No need to trigger click event here, focus is enough to have the keyboard appear on Android
this.hiddenTextarea && this.hiddenTextarea.focus();
},
/**
* Handles keyup event
* @param {Event} e Event object
*/
onKeyDown: function(e) {
if (!this.isEditing || this.inCompositionMode) {
return;
}
if (e.keyCode in this.keysMap) {
this[this.keysMap[e.keyCode]](e);
}
else if ((e.keyCode in this.ctrlKeysMapDown) && (e.ctrlKey || e.metaKey)) {
this[this.ctrlKeysMapDown[e.keyCode]](e);
}
else {
return;
}
e.stopImmediatePropagation();
e.preventDefault();
if (e.keyCode >= 33 && e.keyCode <= 40) {
// if i press an arrow key just update selection
this.clearContextTop();
this.renderCursorOrSelection();
}
else {
this.canvas && this.canvas.requestRenderAll();
}
},
/**
* Handles keyup event
* We handle KeyUp because ie11 and edge have difficulties copy/pasting
* if a copy/cut event fired, keyup is dismissed
* @param {Event} e Event object
*/
onKeyUp: function(e) {
if (!this.isEditing || this._copyDone || this.inCompositionMode) {
this._copyDone = false;
return;
}
if ((e.keyCode in this.ctrlKeysMapUp) && (e.ctrlKey || e.metaKey)) {
this[this.ctrlKeysMapUp[e.keyCode]](e);
}
else {
return;
}
e.stopImmediatePropagation();
e.preventDefault();
this.canvas && this.canvas.requestRenderAll();
},
/**
* Handles onInput event
* @param {Event} e Event object
*/
onInput: function(e) {
var fromPaste = this.fromPaste;
this.fromPaste = false;
e && e.stopPropagation();
if (!this.isEditing) {
return;
}
// decisions about style changes.
var nextText = this._splitTextIntoLines(this.hiddenTextarea.value).graphemeText,
charCount = this._text.length,
nextCharCount = nextText.length,
removedText, insertedText,
charDiff = nextCharCount - charCount;
if (this.hiddenTextarea.value === '') {
this.styles = { };
this.updateFromTextArea();
this.fire('changed');
if (this.canvas) {
this.canvas.fire('text:changed', { target: this });
this.canvas.requestRenderAll();
}
return;
}
var textareaSelection = this.fromStringToGraphemeSelection(
this.hiddenTextarea.selectionStart,
this.hiddenTextarea.selectionEnd,
this.hiddenTextarea.value
);
var backDelete = this.selectionStart > textareaSelection.selectionStart;
if (this.selectionStart !== this.selectionEnd) {
removedText = this._text.slice(this.selectionStart, this.selectionEnd);
charDiff += this.selectionEnd - this.selectionStart;
}
else if (nextCharCount < charCount) {
if (backDelete) {
removedText = this._text.slice(this.selectionEnd + charDiff, this.selectionEnd);
}
else {
removedText = this._text.slice(this.selectionStart, this.selectionStart - charDiff);
}
}
insertedText = nextText.slice(textareaSelection.selectionEnd - charDiff, textareaSelection.selectionEnd);
if (removedText && removedText.length) {
if (this.selectionStart !== this.selectionEnd) {
this.removeStyleFromTo(this.selectionStart, this.selectionEnd);
}
else if (backDelete) {
// detect differencies between forwardDelete and backDelete
this.removeStyleFromTo(this.selectionEnd - removedText.length, this.selectionEnd);
}
else {
this.removeStyleFromTo(this.selectionEnd, this.selectionEnd + removedText.length);
}
}
if (insertedText.length) {
if (fromPaste && insertedText.join('') === fabric.copiedText && !fabric.disableStyleCopyPaste) {
this.insertNewStyleBlock(insertedText, this.selectionStart, fabric.copiedTextStyle);
}
else {
this.insertNewStyleBlock(insertedText, this.selectionStart);
}
}
this.updateFromTextArea();
this.fire('changed');
if (this.canvas) {
this.canvas.fire('text:changed', { target: this });
this.canvas.requestRenderAll();
}
},
/**
* Composition start
*/
onCompositionStart: function() {
this.inCompositionMode = true;
},
/**
* Composition end
*/
onCompositionEnd: function() {
this.inCompositionMode = false;
},
// /**
// * Composition update
// */
onCompositionUpdate: function(e) {
this.compositionStart = e.target.selectionStart;
this.compositionEnd = e.target.selectionEnd;
this.updateTextareaPosition();
},
/**
* Copies selected text
* @param {Event} e Event object
*/
copy: function() {
if (this.selectionStart === this.selectionEnd) {
//do not cut-copy if no selection
return;
}
fabric.copiedText = this.getSelectedText();
if (!fabric.disableStyleCopyPaste) {
fabric.copiedTextStyle = this.getSelectionStyles(this.selectionStart, this.selectionEnd, true);
}
else {
fabric.copiedTextStyle = null;
}
this._copyDone = true;
},
/**
* Pastes text
* @param {Event} e Event object
*/
paste: function() {
this.fromPaste = true;
},
/**
* @private
* @param {Event} e Event object
* @return {Object} Clipboard data object
*/
_getClipboardData: function(e) {
return (e && e.clipboardData) || fabric.window.clipboardData;
},
/**
* Finds the width in pixels before the cursor on the same line
* @private
* @param {Number} lineIndex
* @param {Number} charIndex
* @return {Number} widthBeforeCursor width before cursor
*/
_getWidthBeforeCursor: function(lineIndex, charIndex) {
var widthBeforeCursor = this._getLineLeftOffset(lineIndex), bound;
if (charIndex > 0) {
bound = this.__charBounds[lineIndex][charIndex - 1];
widthBeforeCursor += bound.left + bound.width;
}
return widthBeforeCursor;
},
/**
* Gets start offset of a selection
* @param {Event} e Event object
* @param {Boolean} isRight
* @return {Number}
*/
getDownCursorOffset: function(e, isRight) {
var selectionProp = this._getSelectionForOffset(e, isRight),
cursorLocation = this.get2DCursorLocation(selectionProp),
lineIndex = cursorLocation.lineIndex;
// if on last line, down cursor goes to end of line
if (lineIndex === this._textLines.length - 1 || e.metaKey || e.keyCode === 34) {
// move to the end of a text
return this._text.length - selectionProp;
}
var charIndex = cursorLocation.charIndex,
widthBeforeCursor = this._getWidthBeforeCursor(lineIndex, charIndex),
indexOnOtherLine = this._getIndexOnLine(lineIndex + 1, widthBeforeCursor),
textAfterCursor = this._textLines[lineIndex].slice(charIndex);
return textAfterCursor.length + indexOnOtherLine + 1 + this.missingNewlineOffset(lineIndex);
},
/**
* private
* Helps finding if the offset should be counted from Start or End
* @param {Event} e Event object
* @param {Boolean} isRight
* @return {Number}
*/
_getSelectionForOffset: function(e, isRight) {
if (e.shiftKey && this.selectionStart !== this.selectionEnd && isRight) {
return this.selectionEnd;
}
else {
return this.selectionStart;
}
},
/**
* @param {Event} e Event object
* @param {Boolean} isRight
* @return {Number}
*/
getUpCursorOffset: function(e, isRight) {
var selectionProp = this._getSelectionForOffset(e, isRight),
cursorLocation = this.get2DCursorLocation(selectionProp),
lineIndex = cursorLocation.lineIndex;
if (lineIndex === 0 || e.metaKey || e.keyCode === 33) {
// if on first line, up cursor goes to start of line
return -selectionProp;
}
var charIndex = cursorLocation.charIndex,
widthBeforeCursor = this._getWidthBeforeCursor(lineIndex, charIndex),
indexOnOtherLine = this._getIndexOnLine(lineIndex - 1, widthBeforeCursor),
textBeforeCursor = this._textLines[lineIndex].slice(0, charIndex),
missingNewlineOffset = this.missingNewlineOffset(lineIndex - 1);
// return a negative offset
return -this._textLines[lineIndex - 1].length
+ indexOnOtherLine - textBeforeCursor.length + (1 - missingNewlineOffset);
},
/**
* for a given width it founds the matching character.
* @private
*/
_getIndexOnLine: function(lineIndex, width) {
var line = this._textLines[lineIndex],
lineLeftOffset = this._getLineLeftOffset(lineIndex),
widthOfCharsOnLine = lineLeftOffset,
indexOnLine = 0, charWidth, foundMatch;
for (var j = 0, jlen = line.length; j < jlen; j++) {
charWidth = this.__charBounds[lineIndex][j].width;
widthOfCharsOnLine += charWidth;
if (widthOfCharsOnLine > width) {
foundMatch = true;
var leftEdge = widthOfCharsOnLine - charWidth,
rightEdge = widthOfCharsOnLine,
offsetFromLeftEdge = Math.abs(leftEdge - width),
offsetFromRightEdge = Math.abs(rightEdge - width);
indexOnLine = offsetFromRightEdge < offsetFromLeftEdge ? j : (j - 1);
break;
}
}
// reached end
if (!foundMatch) {
indexOnLine = line.length - 1;
}
return indexOnLine;
},
/**
* Moves cursor down
* @param {Event} e Event object
*/
moveCursorDown: function(e) {
if (this.selectionStart >= this._text.length && this.selectionEnd >= this._text.length) {
return;
}
this._moveCursorUpOrDown('Down', e);
},
/**
* Moves cursor up
* @param {Event} e Event object
*/
moveCursorUp: function(e) {
if (this.selectionStart === 0 && this.selectionEnd === 0) {
return;
}
this._moveCursorUpOrDown('Up', e);
},
/**
* Moves cursor up or down, fires the events
* @param {String} direction 'Up' or 'Down'
* @param {Event} e Event object
*/
_moveCursorUpOrDown: function(direction, e) {
// getUpCursorOffset
// getDownCursorOffset
var action = 'get' + direction + 'CursorOffset',
offset = this[action](e, this._selectionDirection === 'right');
if (e.shiftKey) {
this.moveCursorWithShift(offset);
}
else {
this.moveCursorWithoutShift(offset);
}
if (offset !== 0) {
this.setSelectionInBoundaries();
this.abortCursorAnimation();
this._currentCursorOpacity = 1;
this.initDelayedCursor();
this._fireSelectionChanged();
this._updateTextarea();
}
},
/**
* Moves cursor with shift
* @param {Number} offset
*/
moveCursorWithShift: function(offset) {
var newSelection = this._selectionDirection === 'left'
? this.selectionStart + offset
: this.selectionEnd + offset;
this.setSelectionStartEndWithShift(this.selectionStart, this.selectionEnd, newSelection);
return offset !== 0;
},
/**
* Moves cursor up without shift
* @param {Number} offset
*/
moveCursorWithoutShift: function(offset) {
if (offset < 0) {
this.selectionStart += offset;
this.selectionEnd = this.selectionStart;
}
else {
this.selectionEnd += offset;
this.selectionStart = this.selectionEnd;
}
return offset !== 0;
},
/**
* Moves cursor left
* @param {Event} e Event object
*/
moveCursorLeft: function(e) {
if (this.selectionStart === 0 && this.selectionEnd === 0) {
return;
}
this._moveCursorLeftOrRight('Left', e);
},
/**
* @private
* @return {Boolean} true if a change happened
*/
_move: function(e, prop, direction) {
var newValue;
if (e.altKey) {
newValue = this['findWordBoundary' + direction](this[prop]);
}
else if (e.metaKey || e.keyCode === 35 || e.keyCode === 36 ) {
newValue = this['findLineBoundary' + direction](this[prop]);
}
else {
this[prop] += direction === 'Left' ? -1 : 1;
return true;
}
if (typeof newValue !== undefined && this[prop] !== newValue) {
this[prop] = newValue;
return true;
}
},
/**
* @private
*/
_moveLeft: function(e, prop) {
return this._move(e, prop, 'Left');
},
/**
* @private
*/
_moveRight: function(e, prop) {
return this._move(e, prop, 'Right');
},
/**
* Moves cursor left without keeping selection
* @param {Event} e
*/
moveCursorLeftWithoutShift: function(e) {
var change = true;
this._selectionDirection = 'left';
// only move cursor when there is no selection,
// otherwise we discard it, and leave cursor on same place
if (this.selectionEnd === this.selectionStart && this.selectionStart !== 0) {
change = this._moveLeft(e, 'selectionStart');
}
this.selectionEnd = this.selectionStart;
return change;
},
/**
* Moves cursor left while keeping selection
* @param {Event} e
*/
moveCursorLeftWithShift: function(e) {
if (this._selectionDirection === 'right' && this.selectionStart !== this.selectionEnd) {
return this._moveLeft(e, 'selectionEnd');
}
else if (this.selectionStart !== 0){
this._selectionDirection = 'left';
return this._moveLeft(e, 'selectionStart');
}
},
/**
* Moves cursor right
* @param {Event} e Event object
*/
moveCursorRight: function(e) {
if (this.selectionStart >= this._text.length && this.selectionEnd >= this._text.length) {
return;
}
this._moveCursorLeftOrRight('Right', e);
},
/**
* Moves cursor right or Left, fires event
* @param {String} direction 'Left', 'Right'
* @param {Event} e Event object
*/
_moveCursorLeftOrRight: function(direction, e) {
var actionName = 'moveCursor' + direction + 'With';
this._currentCursorOpacity = 1;
if (e.shiftKey) {
actionName += 'Shift';
}
else {
actionName += 'outShift';
}
if (this[actionName](e)) {
this.abortCursorAnimation();
this.initDelayedCursor();
this._fireSelectionChanged();
this._updateTextarea();
}
},
/**
* Moves cursor right while keeping selection
* @param {Event} e
*/
moveCursorRightWithShift: function(e) {
if (this._selectionDirection === 'left' && this.selectionStart !== this.selectionEnd) {
return this._moveRight(e, 'selectionStart');
}
else if (this.selectionEnd !== this._text.length) {
this._selectionDirection = 'right';
return this._moveRight(e, 'selectionEnd');
}
},
/**
* Moves cursor right without keeping selection
* @param {Event} e Event object
*/
moveCursorRightWithoutShift: function(e) {
var changed = true;
this._selectionDirection = 'right';
if (this.selectionStart === this.selectionEnd) {
changed = this._moveRight(e, 'selectionStart');
this.selectionEnd = this.selectionStart;
}
else {
this.selectionStart = this.selectionEnd;
}
return changed;
},
/**
* Removes characters from start/end
* start/end ar per grapheme position in _text array.
*
* @param {Number} start
* @param {Number} end default to start + 1
*/
removeChars: function(start, end) {
if (typeof end === 'undefined') {
end = start + 1;
}
this.removeStyleFromTo(start, end);
this._text.splice(start, end - start);
this.text = this._text.join('');
this.set('dirty', true);
if (this._shouldClearDimensionCache()) {
this.initDimensions();
this.setCoords();
}
this._removeExtraneousStyles();
},
/**
* insert characters at start position, before start position.
* start equal 1 it means the text get inserted between actual grapheme 0 and 1
* if style array is provided, it must be as the same length of text in graphemes
* if end is provided and is bigger than start, old text is replaced.
* start/end ar per grapheme position in _text array.
*
* @param {String} text text to insert
* @param {Array} style array of style objects
* @param {Number} start
* @param {Number} end default to start + 1
*/
insertChars: function(text, style, start, end) {
if (typeof end === 'undefined') {
end = start;
}
if (end > start) {
this.removeStyleFromTo(start, end);
}
var graphemes = fabric.util.string.graphemeSplit(text);
this.insertNewStyleBlock(graphemes, start, style);
this._text = [].concat(this._text.slice(0, start), graphemes, this._text.slice(end));
this.text = this._text.join('');
this.set('dirty', true);
if (this._shouldClearDimensionCache()) {
this.initDimensions();
this.setCoords();
}
this._removeExtraneousStyles();
},
});
/* _TO_SVG_START_ */
(function() {
var toFixed = fabric.util.toFixed,
multipleSpacesRegex = / +/g;
fabric.util.object.extend(fabric.Text.prototype, /** @lends fabric.Text.prototype */ {
/**
* Returns SVG representation of an instance
* @param {Function} [reviver] Method for further parsing of svg representation.
* @return {String} svg representation of an instance
*/
_toSVG: function() {
var offsets = this._getSVGLeftTopOffsets(),
textAndBg = this._getSVGTextAndBg(offsets.textTop, offsets.textLeft);
return this._wrapSVGTextAndBg(textAndBg);
},
/**
* Returns svg representation of an instance
* @param {Function} [reviver] Method for further parsing of svg representation.
* @return {String} svg representation of an instance
*/
toSVG: function(reviver) {
return this._createBaseSVGMarkup(
this._toSVG(),
{ reviver: reviver, noStyle: true, withShadow: true }
);
},
/**
* @private
*/
_getSVGLeftTopOffsets: function() {
return {
textLeft: -this.width / 2,
textTop: -this.height / 2,
lineTop: this.getHeightOfLine(0)
};
},
/**
* @private
*/
_wrapSVGTextAndBg: function(textAndBg) {
var noShadow = true,
textDecoration = this.getSvgTextDecoration(this);
return [
textAndBg.textBgRects.join(''),
'\t\t<text xml:space="preserve" ',
(this.fontFamily ? 'font-family="' + this.fontFamily.replace(/"/g, '\'') + '" ' : ''),
(this.fontSize ? 'font-size="' + this.fontSize + '" ' : ''),
(this.fontStyle ? 'font-style="' + this.fontStyle + '" ' : ''),
(this.fontWeight ? 'font-weight="' + this.fontWeight + '" ' : ''),
(textDecoration ? 'text-decoration="' + textDecoration + '" ' : ''),
'style="', this.getSvgStyles(noShadow), '"', this.addPaintOrder(), ' >',
textAndBg.textSpans.join(''),
'</text>\n'
];
},
/**
* @private
* @param {Number} textTopOffset Text top offset
* @param {Number} textLeftOffset Text left offset
* @return {Object}
*/
_getSVGTextAndBg: function(textTopOffset, textLeftOffset) {
var textSpans = [],
textBgRects = [],
height = textTopOffset, lineOffset;
// bounding-box background
this._setSVGBg(textBgRects);
// text and text-background
for (var i = 0, len = this._textLines.length; i < len; i++) {
lineOffset = this._getLineLeftOffset(i);
if (this.textBackgroundColor || this.styleHas('textBackgroundColor', i)) {
this._setSVGTextLineBg(textBgRects, i, textLeftOffset + lineOffset, height);
}
this._setSVGTextLineText(textSpans, i, textLeftOffset + lineOffset, height);
height += this.getHeightOfLine(i);
}
return {
textSpans: textSpans,
textBgRects: textBgRects
};
},
/**
* @private
*/
_createTextCharSpan: function(_char, styleDecl, left, top) {
var shouldUseWhitespace = _char !== _char.trim() || _char.match(multipleSpacesRegex),
styleProps = this.getSvgSpanStyles(styleDecl, shouldUseWhitespace),
fillStyles = styleProps ? 'style="' + styleProps + '"' : '',
dy = styleDecl.deltaY, dySpan = '',
NUM_FRACTION_DIGITS = fabric.Object.NUM_FRACTION_DIGITS;
if (dy) {
dySpan = ' dy="' + toFixed(dy, NUM_FRACTION_DIGITS) + '" ';
}
return [
'<tspan x="', toFixed(left, NUM_FRACTION_DIGITS), '" y="',
toFixed(top, NUM_FRACTION_DIGITS), '" ', dySpan,
fillStyles, '>',
fabric.util.string.escapeXml(_char),
'</tspan>'
].join('');
},
_setSVGTextLineText: function(textSpans, lineIndex, textLeftOffset, textTopOffset) {
// set proper line offset
var lineHeight = this.getHeightOfLine(lineIndex),
isJustify = this.textAlign.indexOf('justify') !== -1,
actualStyle,
nextStyle,
charsToRender = '',
charBox, style,
boxWidth = 0,
line = this._textLines[lineIndex],
timeToRender;
textTopOffset += lineHeight * (1 - this._fontSizeFraction) / this.lineHeight;
for (var i = 0, len = line.length - 1; i <= len; i++) {
timeToRender = i === len || this.charSpacing;
charsToRender += line[i];
charBox = this.__charBounds[lineIndex][i];
if (boxWidth === 0) {
textLeftOffset += charBox.kernedWidth - charBox.width;
boxWidth += charBox.width;
}
else {
boxWidth += charBox.kernedWidth;
}
if (isJustify && !timeToRender) {
if (this._reSpaceAndTab.test(line[i])) {
timeToRender = true;
}
}
if (!timeToRender) {
// if we have charSpacing, we render char by char
actualStyle = actualStyle || this.getCompleteStyleDeclaration(lineIndex, i);
nextStyle = this.getCompleteStyleDeclaration(lineIndex, i + 1);
timeToRender = this._hasStyleChangedForSvg(actualStyle, nextStyle);
}
if (timeToRender) {
style = this._getStyleDeclaration(lineIndex, i) || { };
textSpans.push(this._createTextCharSpan(charsToRender, style, textLeftOffset, textTopOffset));
charsToRender = '';
actualStyle = nextStyle;
textLeftOffset += boxWidth;
boxWidth = 0;
}
}
},
_pushTextBgRect: function(textBgRects, color, left, top, width, height) {
var NUM_FRACTION_DIGITS = fabric.Object.NUM_FRACTION_DIGITS;
textBgRects.push(
'\t\t<rect ',
this._getFillAttributes(color),
' x="',
toFixed(left, NUM_FRACTION_DIGITS),
'" y="',
toFixed(top, NUM_FRACTION_DIGITS),
'" width="',
toFixed(width, NUM_FRACTION_DIGITS),
'" height="',
toFixed(height, NUM_FRACTION_DIGITS),
'"></rect>\n');
},
_setSVGTextLineBg: function(textBgRects, i, leftOffset, textTopOffset) {
var line = this._textLines[i],
heightOfLine = this.getHeightOfLine(i) / this.lineHeight,
boxWidth = 0,
boxStart = 0,
charBox, currentColor,
lastColor = this.getValueOfPropertyAt(i, 0, 'textBackgroundColor');
for (var j = 0, jlen = line.length; j < jlen; j++) {
charBox = this.__charBounds[i][j];
currentColor = this.getValueOfPropertyAt(i, j, 'textBackgroundColor');
if (currentColor !== lastColor) {
lastColor && this._pushTextBgRect(textBgRects, lastColor, leftOffset + boxStart,
textTopOffset, boxWidth, heightOfLine);
boxStart = charBox.left;
boxWidth = charBox.width;
lastColor = currentColor;
}
else {
boxWidth += charBox.kernedWidth;
}
}
currentColor && this._pushTextBgRect(textBgRects, currentColor, leftOffset + boxStart,
textTopOffset, boxWidth, heightOfLine);
},
/**
* Adobe Illustrator (at least CS5) is unable to render rgba()-based fill values
* we work around it by "moving" alpha channel into opacity attribute and setting fill's alpha to 1
*
* @private
* @param {*} value
* @return {String}
*/
_getFillAttributes: function(value) {
var fillColor = (value && typeof value === 'string') ? new fabric.Color(value) : '';
if (!fillColor || !fillColor.getSource() || fillColor.getAlpha() === 1) {
return 'fill="' + value + '"';
}
return 'opacity="' + fillColor.getAlpha() + '" fill="' + fillColor.setAlpha(1).toRgb() + '"';
},
/**
* @private
*/
_getSVGLineTopOffset: function(lineIndex) {
var lineTopOffset = 0, lastHeight = 0;
for (var j = 0; j < lineIndex; j++) {
lineTopOffset += this.getHeightOfLine(j);
}
lastHeight = this.getHeightOfLine(j);
return {
lineTop: lineTopOffset,
offset: (this._fontSizeMult - this._fontSizeFraction) * lastHeight / (this.lineHeight * this._fontSizeMult)
};
},
/**
* Returns styles-string for svg-export
* @param {Boolean} skipShadow a boolean to skip shadow filter output
* @return {String}
*/
getSvgStyles: function(skipShadow) {
var svgStyle = fabric.Object.prototype.getSvgStyles.call(this, skipShadow);
return svgStyle + ' white-space: pre;';
},
});
})();
/* _TO_SVG_END_ */
(function(global) {
'use strict';
var fabric = global.fabric || (global.fabric = {});
/**
* Textbox class, based on IText, allows the user to resize the text rectangle
* and wraps lines automatically. Textboxes have their Y scaling locked, the
* user can only change width. Height is adjusted automatically based on the
* wrapping of lines.
* @class fabric.Textbox
* @extends fabric.IText
* @mixes fabric.Observable
* @return {fabric.Textbox} thisArg
* @see {@link fabric.Textbox#initialize} for constructor definition
*/
fabric.Textbox = fabric.util.createClass(fabric.IText, fabric.Observable, {
/**
* Type of an object
* @type String
* @default
*/
type: 'textbox',
/**
* Minimum width of textbox, in pixels.
* @type Number
* @default
*/
minWidth: 20,
/**
* Minimum calculated width of a textbox, in pixels.
* fixed to 2 so that an empty textbox cannot go to 0
* and is still selectable without text.
* @type Number
* @default
*/
dynamicMinWidth: 2,
/**
* Cached array of text wrapping.
* @type Array
*/
__cachedLines: null,
/**
* Override standard Object class values
*/
lockScalingFlip: true,
/**
* Override standard Object class values
* Textbox needs this on false
*/
noScaleCache: false,
/**
* Properties which when set cause object to change dimensions
* @type Object
* @private
*/
_dimensionAffectingProps: fabric.Text.prototype._dimensionAffectingProps.concat('width'),
/**
* Use this regular expression to split strings in breakable lines
* @private
*/
_wordJoiners: /[ \t\r]/,
/**
* Use this boolean property in order to split strings that have no white space concept.
* this is a cheap way to help with chinese/japaense
* @type Boolean
* @since 2.6.0
*/
splitByGrapheme: false,
/**
* Unlike superclass's version of this function, Textbox does not update
* its width.
* @private
* @override
*/
initDimensions: function() {
if (this.__skipDimension) {
return;
}
this.isEditing && this.initDelayedCursor();
this.clearContextTop();
this._clearCache();
// clear dynamicMinWidth as it will be different after we re-wrap line
this.dynamicMinWidth = 0;
// wrap lines
this._styleMap = this._generateStyleMap(this._splitText());
// if after wrapping, the width is smaller than dynamicMinWidth, change the width and re-wrap
if (this.dynamicMinWidth > this.width) {
this._set('width', this.dynamicMinWidth);
}
if (this.textAlign.indexOf('justify') !== -1) {
// once text is measured we need to make space fatter to make justified text.
this.enlargeSpaces();
}
// clear cache and re-calculate height
this.height = this.calcTextHeight();
this.saveState({ propertySet: '_dimensionAffectingProps' });
},
/**
* Generate an object that translates the style object so that it is
* broken up by visual lines (new lines and automatic wrapping).
* The original text styles object is broken up by actual lines (new lines only),
* which is only sufficient for Text / IText
* @private
*/
_generateStyleMap: function(textInfo) {
var realLineCount = 0,
realLineCharCount = 0,
charCount = 0,
map = {};
for (var i = 0; i < textInfo.graphemeLines.length; i++) {
if (textInfo.graphemeText[charCount] === '\n' && i > 0) {
realLineCharCount = 0;
charCount++;
realLineCount++;
}
else if (!this.splitByGrapheme && this._reSpaceAndTab.test(textInfo.graphemeText[charCount]) && i > 0) {
// this case deals with space's that are removed from end of lines when wrapping
realLineCharCount++;
charCount++;
}
map[i] = { line: realLineCount, offset: realLineCharCount };
charCount += textInfo.graphemeLines[i].length;
realLineCharCount += textInfo.graphemeLines[i].length;
}
return map;
},
/**
* Returns true if object has a style property or has it on a specified line
* @param {Number} lineIndex
* @return {Boolean}
*/
styleHas: function(property, lineIndex) {
if (this._styleMap && !this.isWrapping) {
var map = this._styleMap[lineIndex];
if (map) {
lineIndex = map.line;
}
}
return fabric.Text.prototype.styleHas.call(this, property, lineIndex);
},
/**
* Returns true if object has no styling or no styling in a line
* @param {Number} lineIndex , lineIndex is on wrapped lines.
* @return {Boolean}
*/
isEmptyStyles: function(lineIndex) {
var offset = 0, nextLineIndex = lineIndex + 1, nextOffset, obj, shouldLimit = false;
var map = this._styleMap[lineIndex];
var mapNextLine = this._styleMap[lineIndex + 1];
if (map) {
lineIndex = map.line;
offset = map.offset;
}
if (mapNextLine) {
nextLineIndex = mapNextLine.line;
shouldLimit = nextLineIndex === lineIndex;
nextOffset = mapNextLine.offset;
}
obj = typeof lineIndex === 'undefined' ? this.styles : { line: this.styles[lineIndex] };
for (var p1 in obj) {
for (var p2 in obj[p1]) {
if (p2 >= offset && (!shouldLimit || p2 < nextOffset)) {
// eslint-disable-next-line no-unused-vars
for (var p3 in obj[p1][p2]) {
return false;
}
}
}
}
return true;
},
/**
* @param {Number} lineIndex
* @param {Number} charIndex
* @private
*/
_getStyleDeclaration: function(lineIndex, charIndex) {
if (this._styleMap && !this.isWrapping) {
var map = this._styleMap[lineIndex];
if (!map) {
return null;
}
lineIndex = map.line;
charIndex = map.offset + charIndex;
}
return this.callSuper('_getStyleDeclaration', lineIndex, charIndex);
},
/**
* @param {Number} lineIndex
* @param {Number} charIndex
* @param {Object} style
* @private
*/
_setStyleDeclaration: function(lineIndex, charIndex, style) {
var map = this._styleMap[lineIndex];
lineIndex = map.line;
charIndex = map.offset + charIndex;
this.styles[lineIndex][charIndex] = style;
},
/**
* @param {Number} lineIndex
* @param {Number} charIndex
* @private
*/
_deleteStyleDeclaration: function(lineIndex, charIndex) {
var map = this._styleMap[lineIndex];
lineIndex = map.line;
charIndex = map.offset + charIndex;
delete this.styles[lineIndex][charIndex];
},
/**
* probably broken need a fix
* Returns the real style line that correspond to the wrapped lineIndex line
* Used just to verify if the line does exist or not.
* @param {Number} lineIndex
* @returns {Boolean} if the line exists or not
* @private
*/
_getLineStyle: function(lineIndex) {
var map = this._styleMap[lineIndex];
return !!this.styles[map.line];
},
/**
* Set the line style to an empty object so that is initialized
* @param {Number} lineIndex
* @param {Object} style
* @private
*/
_setLineStyle: function(lineIndex) {
var map = this._styleMap[lineIndex];
this.styles[map.line] = {};
},
/**
* Wraps text using the 'width' property of Textbox. First this function
* splits text on newlines, so we preserve newlines entered by the user.
* Then it wraps each line using the width of the Textbox by calling
* _wrapLine().
* @param {Array} lines The string array of text that is split into lines
* @param {Number} desiredWidth width you want to wrap to
* @returns {Array} Array of lines
*/
_wrapText: function(lines, desiredWidth) {
var wrapped = [], i;
this.isWrapping = true;
for (i = 0; i < lines.length; i++) {
wrapped = wrapped.concat(this._wrapLine(lines[i], i, desiredWidth));
}
this.isWrapping = false;
return wrapped;
},
/**
* Helper function to measure a string of text, given its lineIndex and charIndex offset
* it gets called when charBounds are not available yet.
* @param {CanvasRenderingContext2D} ctx
* @param {String} text
* @param {number} lineIndex
* @param {number} charOffset
* @returns {number}
* @private
*/
_measureWord: function(word, lineIndex, charOffset) {
var width = 0, prevGrapheme, skipLeft = true;
charOffset = charOffset || 0;
for (var i = 0, len = word.length; i < len; i++) {
var box = this._getGraphemeBox(word[i], lineIndex, i + charOffset, prevGrapheme, skipLeft);
width += box.kernedWidth;
prevGrapheme = word[i];
}
return width;
},
/**
* Wraps a line of text using the width of the Textbox and a context.
* @param {Array} line The grapheme array that represent the line
* @param {Number} lineIndex
* @param {Number} desiredWidth width you want to wrap the line to
* @param {Number} reservedSpace space to remove from wrapping for custom functionalities
* @returns {Array} Array of line(s) into which the given text is wrapped
* to.
*/
_wrapLine: function(_line, lineIndex, desiredWidth, reservedSpace) {
var lineWidth = 0,
splitByGrapheme = this.splitByGrapheme,
graphemeLines = [],
line = [],
// spaces in different languges?
words = splitByGrapheme ? fabric.util.string.graphemeSplit(_line) : _line.split(this._wordJoiners),
word = '',
offset = 0,
infix = splitByGrapheme ? '' : ' ',
wordWidth = 0,
infixWidth = 0,
largestWordWidth = 0,
lineJustStarted = true,
additionalSpace = splitByGrapheme ? 0 : this._getWidthOfCharSpacing(),
reservedSpace = reservedSpace || 0;
// fix a difference between split and graphemeSplit
if (words.length === 0) {
words.push([]);
}
desiredWidth -= reservedSpace;
for (var i = 0; i < words.length; i++) {
// if using splitByGrapheme words are already in graphemes.
word = splitByGrapheme ? words[i] : fabric.util.string.graphemeSplit(words[i]);
wordWidth = this._measureWord(word, lineIndex, offset);
offset += word.length;
lineWidth += infixWidth + wordWidth - additionalSpace;
if (lineWidth >= desiredWidth && !lineJustStarted) {
graphemeLines.push(line);
line = [];
lineWidth = wordWidth;
lineJustStarted = true;
}
else {
lineWidth += additionalSpace;
}
if (!lineJustStarted && !splitByGrapheme) {
line.push(infix);
}
line = line.concat(word);
infixWidth = this._measureWord([infix], lineIndex, offset);
offset++;
lineJustStarted = false;
// keep track of largest word
if (wordWidth > largestWordWidth) {
largestWordWidth = wordWidth;
}
}
i && graphemeLines.push(line);
if (largestWordWidth + reservedSpace > this.dynamicMinWidth) {
this.dynamicMinWidth = largestWordWidth - additionalSpace + reservedSpace;
}
return graphemeLines;
},
/**
* Detect if the text line is ended with an hard break
* text and itext do not have wrapping, return false
* @param {Number} lineIndex text to split
* @return {Boolean}
*/
isEndOfWrapping: function(lineIndex) {
if (!this._styleMap[lineIndex + 1]) {
// is last line, return true;
return true;
}
if (this._styleMap[lineIndex + 1].line !== this._styleMap[lineIndex].line) {
// this is last line before a line break, return true;
return true;
}
return false;
},
/**
* Detect if a line has a linebreak and so we need to account for it when moving
* and counting style.
* @return Number
*/
missingNewlineOffset: function(lineIndex) {
if (this.splitByGrapheme) {
return this.isEndOfWrapping(lineIndex) ? 1 : 0;
}
return 1;
},
/**
* Gets lines of text to render in the Textbox. This function calculates
* text wrapping on the fly every time it is called.
* @param {String} text text to split
* @returns {Array} Array of lines in the Textbox.
* @override
*/
_splitTextIntoLines: function(text) {
var newText = fabric.Text.prototype._splitTextIntoLines.call(this, text),
graphemeLines = this._wrapText(newText.lines, this.width),
lines = new Array(graphemeLines.length);
for (var i = 0; i < graphemeLines.length; i++) {
lines[i] = graphemeLines[i].join('');
}
newText.lines = lines;
newText.graphemeLines = graphemeLines;
return newText;
},
getMinWidth: function() {
return Math.max(this.minWidth, this.dynamicMinWidth);
},
_removeExtraneousStyles: function() {
var linesToKeep = {};
for (var prop in this._styleMap) {
if (this._textLines[prop]) {
linesToKeep[this._styleMap[prop].line] = 1;
}
}
for (var prop in this.styles) {
if (!linesToKeep[prop]) {
delete this.styles[prop];
}
}
},
/**
* Returns object representation of an instance
* @method toObject
* @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output
* @return {Object} object representation of an instance
*/
toObject: function(propertiesToInclude) {
return this.callSuper('toObject', ['minWidth', 'splitByGrapheme'].concat(propertiesToInclude));
}
});
/**
* Returns fabric.Textbox instance from an object representation
* @static
* @memberOf fabric.Textbox
* @param {Object} object Object to create an instance from
* @param {Function} [callback] Callback to invoke when an fabric.Textbox instance is created
*/
fabric.Textbox.fromObject = function(object, callback) {
return fabric.Object._fromObject('Textbox', object, callback, 'text');
};
})(typeof exports !== 'undefined' ? exports : this);
(function() {
/**
* Override _setObjectScale and add Textbox specific resizing behavior. Resizing
* a Textbox doesn't scale text, it only changes width and makes text wrap automatically.
*/
var setObjectScaleOverridden = fabric.Canvas.prototype._setObjectScale;
fabric.Canvas.prototype._setObjectScale = function(localMouse, transform,
lockScalingX, lockScalingY, by, lockScalingFlip, _dim) {
var t = transform.target, scaled,
scaleX = localMouse.x * t.scaleX / _dim.x,
scaleY = localMouse.y * t.scaleY / _dim.y;
if (by === 'x' && t instanceof fabric.Textbox) {
var tw = t._getTransformedDimensions().x;
var w = t.width * (localMouse.x / tw);
transform.newScaleX = scaleX;
transform.newScaleY = scaleY;
if (w >= t.getMinWidth()) {
scaled = w !== t.width;
t.set('width', w);
return scaled;
}
}
else {
return setObjectScaleOverridden.call(fabric.Canvas.prototype, localMouse, transform,
lockScalingX, lockScalingY, by, lockScalingFlip, _dim);
}
};
fabric.util.object.extend(fabric.Textbox.prototype, /** @lends fabric.IText.prototype */ {
/**
* @private
*/
_removeExtraneousStyles: function() {
for (var prop in this._styleMap) {
if (!this._textLines[prop]) {
delete this.styles[this._styleMap[prop].line];
}
}
},
});
})();
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