/* build: `node build.js modules=ALL` */
/*! Fabric.js Copyright 2008-2012, Printio (Juriy Zaytsev, Maxim Chernyak) */
var fabric = fabric || { version: "0.9.21" };
if (typeof exports != 'undefined') {
exports.fabric = fabric;
}
if (typeof document != 'undefined' && typeof window != 'undefined') {
fabric.document = document;
fabric.window = window;
}
else {
// assume we're running under node.js when document/window are not present
fabric.document = require("jsdom").jsdom("");
fabric.window = fabric.document.createWindow();
}
/**
* True when in environment that supports touch events
* @property isTouchSupported
* @type boolean
*/
fabric.isTouchSupported = "ontouchstart" in fabric.document.documentElement;
/**
* True when in environment that's probably Node.js
* @property isLikelyNode
* @type boolean
*/
fabric.isLikelyNode = typeof Buffer !== 'undefined' && typeof window === 'undefined';
/*!
* Copyright (c) 2009 Simo Kinnunen.
* Licensed under the MIT license.
*/
var Cufon = (function() {
var api = function() {
return api.replace.apply(null, arguments);
};
var DOM = api.DOM = {
ready: (function() {
var complete = false, readyStatus = { loaded: 1, complete: 1 };
var queue = [], perform = function() {
if (complete) return;
complete = true;
for (var fn; fn = queue.shift(); fn());
};
// Gecko, Opera, WebKit r26101+
if (fabric.document.addEventListener) {
fabric.document.addEventListener('DOMContentLoaded', perform, false);
fabric.window.addEventListener('pageshow', perform, false); // For cached Gecko pages
}
// Old WebKit, Internet Explorer
if (!fabric.window.opera && fabric.document.readyState) (function() {
readyStatus[fabric.document.readyState] ? perform() : setTimeout(arguments.callee, 10);
})();
// Internet Explorer
if (fabric.document.readyState && fabric.document.createStyleSheet) (function() {
try {
fabric.document.body.doScroll('left');
perform();
}
catch (e) {
setTimeout(arguments.callee, 1);
}
})();
addEvent(fabric.window, 'load', perform); // Fallback
return function(listener) {
if (!arguments.length) perform();
else complete ? listener() : queue.push(listener);
};
})()
};
var CSS = api.CSS = {
Size: function(value, base) {
this.value = parseFloat(value);
this.unit = String(value).match(/[a-z%]*$/)[0] || 'px';
this.convert = function(value) {
return value / base * this.value;
};
this.convertFrom = function(value) {
return value / this.value * base;
};
this.toString = function() {
return this.value + this.unit;
};
},
getStyle: function(el) {
return new Style(el.style);
/*
var view = document.defaultView;
if (view && view.getComputedStyle) return new Style(view.getComputedStyle(el, null));
if (el.currentStyle) return new Style(el.currentStyle);
return new Style(el.style);
*/
},
quotedList: cached(function(value) {
// doesn't work properly with empty quoted strings (""), but
// it's not worth the extra code.
var list = [], re = /\s*((["'])([\s\S]*?[^\\])\2|[^,]+)\s*/g, match;
while (match = re.exec(value)) list.push(match[3] || match[1]);
return list;
}),
ready: (function() {
var complete = false;
var queue = [], perform = function() {
complete = true;
for (var fn; fn = queue.shift(); fn());
};
// Safari 2 does not include ');
function getFontSizeInPixels(el, value) {
return getSizeInPixels(el, /(?:em|ex|%)$/i.test(value) ? '1em' : value);
}
// Original by Dead Edwards.
// Combined with getFontSizeInPixels it also works with relative units.
function getSizeInPixels(el, value) {
if (/px$/i.test(value)) return parseFloat(value);
var style = el.style.left, runtimeStyle = el.runtimeStyle.left;
el.runtimeStyle.left = el.currentStyle.left;
el.style.left = value;
var result = el.style.pixelLeft;
el.style.left = style;
el.runtimeStyle.left = runtimeStyle;
return result;
}
return function(font, text, style, options, node, el, hasNext) {
var redraw = (text === null);
if (redraw) text = node.alt;
// @todo word-spacing, text-decoration
var viewBox = font.viewBox;
var size = style.computedFontSize ||
(style.computedFontSize = new Cufon.CSS.Size(getFontSizeInPixels(el, style.get('fontSize')) + 'px', font.baseSize));
var letterSpacing = style.computedLSpacing;
if (letterSpacing == undefined) {
letterSpacing = style.get('letterSpacing');
style.computedLSpacing = letterSpacing =
(letterSpacing == 'normal') ? 0 : ~~size.convertFrom(getSizeInPixels(el, letterSpacing));
}
var wrapper, canvas;
if (redraw) {
wrapper = node;
canvas = node.firstChild;
}
else {
wrapper = fabric.document.createElement('span');
wrapper.className = 'cufon cufon-vml';
wrapper.alt = text;
canvas = fabric.document.createElement('span');
canvas.className = 'cufon-vml-canvas';
wrapper.appendChild(canvas);
if (options.printable) {
var print = fabric.document.createElement('span');
print.className = 'cufon-alt';
print.appendChild(fabric.document.createTextNode(text));
wrapper.appendChild(print);
}
// ie6, for some reason, has trouble rendering the last VML element in the document.
// we can work around this by injecting a dummy element where needed.
// @todo find a better solution
if (!hasNext) wrapper.appendChild(fabric.document.createElement('cvml:shape'));
}
var wStyle = wrapper.style;
var cStyle = canvas.style;
var height = size.convert(viewBox.height), roundedHeight = Math.ceil(height);
var roundingFactor = roundedHeight / height;
var minX = viewBox.minX, minY = viewBox.minY;
cStyle.height = roundedHeight;
cStyle.top = Math.round(size.convert(minY - font.ascent));
cStyle.left = Math.round(size.convert(minX));
wStyle.height = size.convert(font.height) + 'px';
var textDecoration = Cufon.getTextDecoration(options);
var color = style.get('color');
var chars = Cufon.CSS.textTransform(text, style).split('');
var width = 0, offsetX = 0, advance = null;
var glyph, shape, shadows = options.textShadow;
// pre-calculate width
for (var i = 0, k = 0, l = chars.length; i < l; ++i) {
glyph = font.glyphs[chars[i]] || font.missingGlyph;
if (glyph) width += advance = ~~(glyph.w || font.w) + letterSpacing;
}
if (advance === null) return null;
var fullWidth = -minX + width + (viewBox.width - advance);
var shapeWidth = size.convert(fullWidth * roundingFactor), roundedShapeWidth = Math.round(shapeWidth);
var coordSize = fullWidth + ',' + viewBox.height, coordOrigin;
var stretch = 'r' + coordSize + 'nsnf';
for (i = 0; i < l; ++i) {
glyph = font.glyphs[chars[i]] || font.missingGlyph;
if (!glyph) continue;
if (redraw) {
// some glyphs may be missing so we can't use i
shape = canvas.childNodes[k];
if (shape.firstChild) shape.removeChild(shape.firstChild); // shadow
}
else {
shape = fabric.document.createElement('cvml:shape');
canvas.appendChild(shape);
}
shape.stroked = 'f';
shape.coordsize = coordSize;
shape.coordorigin = coordOrigin = (minX - offsetX) + ',' + minY;
shape.path = (glyph.d ? 'm' + glyph.d + 'xe' : '') + 'm' + coordOrigin + stretch;
shape.fillcolor = color;
// it's important to not set top/left or IE8 will grind to a halt
var sStyle = shape.style;
sStyle.width = roundedShapeWidth;
sStyle.height = roundedHeight;
if (shadows) {
// due to the limitations of the VML shadow element there
// can only be two visible shadows. opacity is shared
// for all shadows.
var shadow1 = shadows[0], shadow2 = shadows[1];
var color1 = Cufon.CSS.color(shadow1.color), color2;
var shadow = fabric.document.createElement('cvml:shadow');
shadow.on = 't';
shadow.color = color1.color;
shadow.offset = shadow1.offX + ',' + shadow1.offY;
if (shadow2) {
color2 = Cufon.CSS.color(shadow2.color);
shadow.type = 'double';
shadow.color2 = color2.color;
shadow.offset2 = shadow2.offX + ',' + shadow2.offY;
}
shadow.opacity = color1.opacity || (color2 && color2.opacity) || 1;
shape.appendChild(shadow);
}
offsetX += ~~(glyph.w || font.w) + letterSpacing;
++k;
}
wStyle.width = Math.max(Math.ceil(size.convert(width * roundingFactor)), 0);
return wrapper;
};
})());
Cufon.getTextDecoration = function(options) {
return {
underline: options.textDecoration === 'underline',
overline: options.textDecoration === 'overline',
'line-through': options.textDecoration === 'line-through'
};
};
if (typeof exports != 'undefined') {
exports.Cufon = Cufon;
}
/*
json2.js
2011-10-19
Public Domain.
NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
See http://www.JSON.org/js.html
This code should be minified before deployment.
See http://javascript.crockford.com/jsmin.html
USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
NOT CONTROL.
This file creates a global JSON object containing two methods: stringify
and parse.
JSON.stringify(value, replacer, space)
value any JavaScript value, usually an object or array.
replacer an optional parameter that determines how object
values are stringified for objects. It can be a
function or an array of strings.
space an optional parameter that specifies the indentation
of nested structures. If it is omitted, the text will
be packed without extra whitespace. If it is a number,
it will specify the number of spaces to indent at each
level. If it is a string (such as '\t' or ' '),
it contains the characters used to indent at each level.
This method produces a JSON text from a JavaScript value.
When an object value is found, if the object contains a toJSON
method, its toJSON method will be called and the result will be
stringified. A toJSON method does not serialize: it returns the
value represented by the name/value pair that should be serialized,
or undefined if nothing should be serialized. The toJSON method
will be passed the key associated with the value, and this will be
bound to the value
For example, this would serialize Dates as ISO strings.
Date.prototype.toJSON = function (key) {
function f(n) {
// Format integers to have at least two digits.
return n < 10 ? '0' + n : n;
}
return this.getUTCFullYear() + '-' +
f(this.getUTCMonth() + 1) + '-' +
f(this.getUTCDate()) + 'T' +
f(this.getUTCHours()) + ':' +
f(this.getUTCMinutes()) + ':' +
f(this.getUTCSeconds()) + 'Z';
};
You can provide an optional replacer method. It will be passed the
key and value of each member, with this bound to the containing
object. The value that is returned from your method will be
serialized. If your method returns undefined, then the member will
be excluded from the serialization.
If the replacer parameter is an array of strings, then it will be
used to select the members to be serialized. It filters the results
such that only members with keys listed in the replacer array are
stringified.
Values that do not have JSON representations, such as undefined or
functions, will not be serialized. Such values in objects will be
dropped; in arrays they will be replaced with null. You can use
a replacer function to replace those with JSON values.
JSON.stringify(undefined) returns undefined.
The optional space parameter produces a stringification of the
value that is filled with line breaks and indentation to make it
easier to read.
If the space parameter is a non-empty string, then that string will
be used for indentation. If the space parameter is a number, then
the indentation will be that many spaces.
Example:
text = JSON.stringify(['e', {pluribus: 'unum'}]);
// text is '["e",{"pluribus":"unum"}]'
text = JSON.stringify(['e', {pluribus: 'unum'}], null, '\t');
// text is '[\n\t"e",\n\t{\n\t\t"pluribus": "unum"\n\t}\n]'
text = JSON.stringify([new Date()], function (key, value) {
return this[key] instanceof Date ?
'Date(' + this[key] + ')' : value;
});
// text is '["Date(---current time---)"]'
JSON.parse(text, reviver)
This method parses a JSON text to produce an object or array.
It can throw a SyntaxError exception.
The optional reviver parameter is a function that can filter and
transform the results. It receives each of the keys and values,
and its return value is used instead of the original value.
If it returns what it received, then the structure is not modified.
If it returns undefined then the member is deleted.
Example:
// Parse the text. Values that look like ISO date strings will
// be converted to Date objects.
myData = JSON.parse(text, function (key, value) {
var a;
if (typeof value === 'string') {
a =
/^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value);
if (a) {
return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4],
+a[5], +a[6]));
}
}
return value;
});
myData = JSON.parse('["Date(09/09/2001)"]', function (key, value) {
var d;
if (typeof value === 'string' &&
value.slice(0, 5) === 'Date(' &&
value.slice(-1) === ')') {
d = new Date(value.slice(5, -1));
if (d) {
return d;
}
}
return value;
});
This is a reference implementation. You are free to copy, modify, or
redistribute.
*/
/*jslint evil: true, regexp: true */
/*members "", "\b", "\t", "\n", "\f", "\r", "\"", JSON, "\\", apply,
call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours,
getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join,
lastIndex, length, parse, prototype, push, replace, slice, stringify,
test, toJSON, toString, valueOf
*/
// Create a JSON object only if one does not already exist. We create the
// methods in a closure to avoid creating global variables.
var JSON;
if (!JSON) {
JSON = {};
}
(function () {
'use strict';
function f(n) {
// Format integers to have at least two digits.
return n < 10 ? '0' + n : n;
}
if (typeof Date.prototype.toJSON !== 'function') {
Date.prototype.toJSON = function (key) {
return isFinite(this.valueOf())
? this.getUTCFullYear() + '-' +
f(this.getUTCMonth() + 1) + '-' +
f(this.getUTCDate()) + 'T' +
f(this.getUTCHours()) + ':' +
f(this.getUTCMinutes()) + ':' +
f(this.getUTCSeconds()) + 'Z'
: null;
};
String.prototype.toJSON =
Number.prototype.toJSON =
Boolean.prototype.toJSON = function (key) {
return this.valueOf();
};
}
var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
gap,
indent,
meta = { // table of character substitutions
'\b': '\\b',
'\t': '\\t',
'\n': '\\n',
'\f': '\\f',
'\r': '\\r',
'"' : '\\"',
'\\': '\\\\'
},
rep;
function quote(string) {
// If the string contains no control characters, no quote characters, and no
// backslash characters, then we can safely slap some quotes around it.
// Otherwise we must also replace the offending characters with safe escape
// sequences.
escapable.lastIndex = 0;
return escapable.test(string) ? '"' + string.replace(escapable, function (a) {
var c = meta[a];
return typeof c === 'string'
? c
: '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
}) + '"' : '"' + string + '"';
}
function str(key, holder) {
// Produce a string from holder[key].
var i, // The loop counter.
k, // The member key.
v, // The member value.
length,
mind = gap,
partial,
value = holder[key];
// If the value has a toJSON method, call it to obtain a replacement value.
if (value && typeof value === 'object' &&
typeof value.toJSON === 'function') {
value = value.toJSON(key);
}
// If we were called with a replacer function, then call the replacer to
// obtain a replacement value.
if (typeof rep === 'function') {
value = rep.call(holder, key, value);
}
// What happens next depends on the value's type.
switch (typeof value) {
case 'string':
return quote(value);
case 'number':
// JSON numbers must be finite. Encode non-finite numbers as null.
return isFinite(value) ? String(value) : 'null';
case 'boolean':
case 'null':
// If the value is a boolean or null, convert it to a string. Note:
// typeof null does not produce 'null'. The case is included here in
// the remote chance that this gets fixed someday.
return String(value);
// If the type is 'object', we might be dealing with an object or an array or
// null.
case 'object':
// Due to a specification blunder in ECMAScript, typeof null is 'object',
// so watch out for that case.
if (!value) {
return 'null';
}
// Make an array to hold the partial results of stringifying this object value.
gap += indent;
partial = [];
// Is the value an array?
if (Object.prototype.toString.apply(value) === '[object Array]') {
// The value is an array. Stringify every element. Use null as a placeholder
// for non-JSON values.
length = value.length;
for (i = 0; i < length; i += 1) {
partial[i] = str(i, value) || 'null';
}
// Join all of the elements together, separated with commas, and wrap them in
// brackets.
v = partial.length === 0
? '[]'
: gap
? '[\n' + gap + partial.join(',\n' + gap) + '\n' + mind + ']'
: '[' + partial.join(',') + ']';
gap = mind;
return v;
}
// If the replacer is an array, use it to select the members to be stringified.
if (rep && typeof rep === 'object') {
length = rep.length;
for (i = 0; i < length; i += 1) {
if (typeof rep[i] === 'string') {
k = rep[i];
v = str(k, value);
if (v) {
partial.push(quote(k) + (gap ? ': ' : ':') + v);
}
}
}
} else {
// Otherwise, iterate through all of the keys in the object.
for (k in value) {
if (Object.prototype.hasOwnProperty.call(value, k)) {
v = str(k, value);
if (v) {
partial.push(quote(k) + (gap ? ': ' : ':') + v);
}
}
}
}
// Join all of the member texts together, separated with commas,
// and wrap them in braces.
v = partial.length === 0
? '{}'
: gap
? '{\n' + gap + partial.join(',\n' + gap) + '\n' + mind + '}'
: '{' + partial.join(',') + '}';
gap = mind;
return v;
}
}
// If the JSON object does not yet have a stringify method, give it one.
if (typeof JSON.stringify !== 'function') {
JSON.stringify = function (value, replacer, space) {
// The stringify method takes a value and an optional replacer, and an optional
// space parameter, and returns a JSON text. The replacer can be a function
// that can replace values, or an array of strings that will select the keys.
// A default replacer method can be provided. Use of the space parameter can
// produce text that is more easily readable.
var i;
gap = '';
indent = '';
// If the space parameter is a number, make an indent string containing that
// many spaces.
if (typeof space === 'number') {
for (i = 0; i < space; i += 1) {
indent += ' ';
}
// If the space parameter is a string, it will be used as the indent string.
} else if (typeof space === 'string') {
indent = space;
}
// If there is a replacer, it must be a function or an array.
// Otherwise, throw an error.
rep = replacer;
if (replacer && typeof replacer !== 'function' &&
(typeof replacer !== 'object' ||
typeof replacer.length !== 'number')) {
throw new Error('JSON.stringify');
}
// Make a fake root object containing our value under the key of ''.
// Return the result of stringifying the value.
return str('', {'': value});
};
}
// If the JSON object does not yet have a parse method, give it one.
if (typeof JSON.parse !== 'function') {
JSON.parse = function (text, reviver) {
// The parse method takes a text and an optional reviver function, and returns
// a JavaScript value if the text is a valid JSON text.
var j;
function walk(holder, key) {
// The walk method is used to recursively walk the resulting structure so
// that modifications can be made.
var k, v, value = holder[key];
if (value && typeof value === 'object') {
for (k in value) {
if (Object.prototype.hasOwnProperty.call(value, k)) {
v = walk(value, k);
if (v !== undefined) {
value[k] = v;
} else {
delete value[k];
}
}
}
}
return reviver.call(holder, key, value);
}
// Parsing happens in four stages. In the first stage, we replace certain
// Unicode characters with escape sequences. JavaScript handles many characters
// incorrectly, either silently deleting them, or treating them as line endings.
text = String(text);
cx.lastIndex = 0;
if (cx.test(text)) {
text = text.replace(cx, function (a) {
return '\\u' +
('0000' + a.charCodeAt(0).toString(16)).slice(-4);
});
}
// In the second stage, we run the text against regular expressions that look
// for non-JSON patterns. We are especially concerned with '()' and 'new'
// because they can cause invocation, and '=' because it can cause mutation.
// But just to be safe, we want to reject all unexpected forms.
// We split the second stage into 4 regexp operations in order to work around
// crippling inefficiencies in IE's and Safari's regexp engines. First we
// replace the JSON backslash pairs with '@' (a non-JSON character). Second, we
// replace all simple value tokens with ']' characters. Third, we delete all
// open brackets that follow a colon or comma or that begin the text. Finally,
// we look to see that the remaining characters are only whitespace or ']' or
// ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval.
if (/^[\],:{}\s]*$/
.test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@')
.replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']')
.replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {
// In the third stage we use the eval function to compile the text into a
// JavaScript structure. The '{' operator is subject to a syntactic ambiguity
// in JavaScript: it can begin a block or an object literal. We wrap the text
// in parens to eliminate the ambiguity.
j = eval('(' + text + ')');
// In the optional fourth stage, we recursively walk the new structure, passing
// each name/value pair to a reviver function for possible transformation.
return typeof reviver === 'function'
? walk({'': j}, '')
: j;
}
// If the text is not JSON parseable, then a SyntaxError is thrown.
throw new SyntaxError('JSON.parse');
};
}
}());
/**
* Wrapper around `console.log` (when available)
* @method log
* @param {Any} Values to log
*/
fabric.log = function() { };
/**
* Wrapper around `console.warn` (when available)
* @method warn
* @param {Any} Values to log as a warning
*/
fabric.warn = function() { };
if (typeof console !== 'undefined') {
if (typeof console.log !== 'undefined' && console.log.apply) {
fabric.log = function() {
return console.log.apply(console, arguments);
};
}
if (typeof console.warn !== 'undefined' && console.warn.apply) {
fabric.warn = function() {
return console.warn.apply(console, arguments);
};
}
}
/**
* @namespace
*/
fabric.Observable = {
/**
* Observes specified event
* @method observe
* @depracated Since 0.8.34. Use `on` instead.
* @param {String} eventName
* @param {Function} handler
*/
observe: function(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);
}
},
/**
* Stops event observing for a particular event handler
* @method stopObserving
* @depracated Since 0.8.34. Use `off` instead.
* @param {String} eventName
* @param {Function} handler
*/
stopObserving: function(eventName, handler) {
if (!this.__eventListeners) {
this.__eventListeners = { };
}
if (this.__eventListeners[eventName]) {
if (handler) {
fabric.util.removeFromArray(this.__eventListeners[eventName], handler);
}
else {
this.__eventListeners[eventName].length = 0;
}
}
},
/**
* Fires event with an optional options object
* @method fire
* @param {String} eventName
* @param {Object} [options]
*/
fire: function(eventName, options) {
if (!this.__eventListeners) {
this.__eventListeners = { };
}
var listenersForEvent = this.__eventListeners[eventName];
if (!listenersForEvent) return;
for (var i = 0, len = listenersForEvent.length; i < len; i++) {
// avoiding try/catch for perf. reasons
listenersForEvent[i](options || { });
}
}
};
/**
* Alias for observe
* @method observe
* @memberOf fabric.Observable
*/
fabric.Observable.on = fabric.Observable.observe;
/**
* Alias for stopObserving
* @method off
*/
fabric.Observable.off = fabric.Observable.stopObserving;
(function() {
/**
* @namespace
*/
fabric.util = { };
/**
* Removes value from an array.
* Presence of value (and its position in an array) is determined via `Array.prototype.indexOf`
* @static
* @memberOf fabric.util
* @method removeFromArray
* @param {Array} array
* @param {Any} value
* @return {Array} original array
*/
function removeFromArray(array, value) {
var idx = array.indexOf(value);
if (idx !== -1) {
array.splice(idx, 1);
}
return array;
}
/**
* Returns random number between 2 specified ones.
* @static
* @method getRandomInt
* @memberOf fabric.util
* @param {Number} min lower limit
* @param {Number} max upper limit
* @return {Number} random value (between min and max)
*/
function getRandomInt(min, max) {
return Math.floor(Math.random() * (max - min + 1)) + min;
}
var PiBy180 = Math.PI / 180;
/**
* Transforms degrees to radians.
* @static
* @method degreesToRadians
* @memberOf fabric.util
* @param {Number} degrees value in degrees
* @return {Number} value in radians
*/
function degreesToRadians(degrees) {
return degrees * PiBy180;
}
/**
* A wrapper around Number#toFixed, which contrary to native method returns number, not string.
* @static
* @method toFixed
* @memberOf fabric.util
* @param {Number | String} number number to operate on
* @param {Number} fractionDigits number of fraction digits to "leave"
* @return {Number}
*/
function toFixed(number, fractionDigits) {
return parseFloat(Number(number).toFixed(fractionDigits));
}
/**
* Function which always returns `false`.
* @static
* @method falseFunction
* @memberOf fabric.util
* @return {Boolean}
*/
function falseFunction() {
return false;
}
/**
* Changes value from one to another within certain period of time, invoking callbacks as value is being changed.
* @method animate
* @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
*/
function animate(options) {
options || (options = { });
var start = +new Date(),
duration = options.duration || 500,
finish = start + duration, time,
onChange = options.onChange || function() { },
abort = options.abort || function() { return false; },
easing = options.easing || function(t, b, c, d) {return -c * Math.cos(t/d * (Math.PI/2)) + c + b;},
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() {
time = +new Date();
var currentTime = time > finish ? duration : (time - start);
onChange(easing(currentTime, startValue, byValue, duration));
if (time > finish || abort()) {
options.onComplete && options.onComplete();
return;
}
requestAnimFrame(tick);
})();
}
var _requestAnimFrame = fabric.window.requestAnimationFrame ||
fabric.window.webkitRequestAnimationFrame ||
fabric.window.mozRequestAnimationFrame ||
fabric.window.oRequestAnimationFrame ||
fabric.window.msRequestAnimationFrame ||
function(callback) {
fabric.window.setTimeout(callback, 1000 / 60);
};
/**
* requestAnimationFrame polyfill based on http://paulirish.com/2011/requestanimationframe-for-smart-animating/
* @method requestAnimFrame
* @memberOf fabric.util
* @param {Function} callback Callback to invoke
* @param {DOMElement} element optional Element to associate with animation
*/
var requestAnimFrame = function() {
return _requestAnimFrame.apply(fabric.window, arguments);
};
/**
* Loads image element from given url and passes it to a callback
* @method loadImage
* @memberOf fabric.util
* @param {String} url URL representing an image
* @param {Function} callback Callback; invoked with loaded image
* @param {Any} context optional Context to invoke callback in
*/
function loadImage(url, callback, context) {
if (url) {
var img = new Image();
/** @ignore */
img.onload = function () {
callback && callback.call(context, img);
img = img.onload = null;
};
img.src = url;
}
else {
callback && callback.call(context, url);
}
}
function enlivenObjects(objects, callback) {
function getKlass(type) {
return fabric[fabric.util.string.camelize(fabric.util.string.capitalize(type))];
}
function onLoaded() {
if (++numLoadedObjects === numTotalObjects) {
if (callback) {
callback(enlivenedObjects);
}
}
}
var enlivenedObjects = [ ],
numLoadedObjects = 0,
numTotalObjects = objects.length;
objects.forEach(function (o, index) {
if (!o.type) {
return;
}
var klass = getKlass(o.type);
if (klass.async) {
klass.fromObject(o, function (o) {
enlivenedObjects[index] = o;
onLoaded();
});
}
else {
enlivenedObjects[index] = klass.fromObject(o);
onLoaded();
}
});
}
/**
* Groups SVG elements (usually those retrieved from SVG document)
* @static
* @memberOf fabric.util
* @method groupSVGElements
* @param {Array} elements
* @param {Object} options optional
* @return {String} path optional
*/
function groupSVGElements(elements, options, path) {
var object = elements.length > 1
? new fabric.PathGroup(elements, options)
: elements[0];
if (typeof path !== 'undefined') {
object.setSourcePath(path);
}
return object;
}
fabric.util.removeFromArray = removeFromArray;
fabric.util.degreesToRadians = degreesToRadians;
fabric.util.toFixed = toFixed;
fabric.util.getRandomInt = getRandomInt;
fabric.util.falseFunction = falseFunction;
fabric.util.animate = animate;
fabric.util.requestAnimFrame = requestAnimFrame;
fabric.util.loadImage = loadImage;
fabric.util.enlivenObjects = enlivenObjects;
fabric.util.groupSVGElements = groupSVGElements;
})();
(function() {
var slice = Array.prototype.slice;
if (!Array.prototype.indexOf) {
Array.prototype.indexOf = function (searchElement /*, fromIndex */ ) {
if (this === void 0 || this === null) {
throw new TypeError();
}
var t = Object(this), len = t.length >>> 0;
if (len === 0) {
return -1;
}
var n = 0;
if (arguments.length > 0) {
n = Number(arguments[1]);
if (n !== n) { // shortcut for verifying if it's NaN
n = 0;
}
else if (n !== 0 && n !== (1 / 0) && n !== -(1 / 0)) {
n = (n > 0 || -1) * Math.floor(Math.abs(n));
}
}
if (n >= len) {
return -1;
}
var k = n >= 0 ? n : Math.max(len - Math.abs(n), 0);
for (; k < len; k++) {
if (k in t && t[k] === searchElement) {
return k;
}
}
return -1;
};
}
if (!Array.prototype.forEach) {
Array.prototype.forEach = function(fn, context) {
for (var i = 0, len = this.length >>> 0; i < len; i++) {
if (i in this) {
fn.call(context, this[i], i, this);
}
}
};
}
if (!Array.prototype.map) {
Array.prototype.map = function(fn, context) {
var result = [ ];
for (var i = 0, len = this.length >>> 0; i < len; i++) {
if (i in this) {
result[i] = fn.call(context, this[i], i, this);
}
}
return result;
};
}
if (!Array.prototype.every) {
Array.prototype.every = function(fn, context) {
for (var i = 0, len = this.length >>> 0; i < len; i++) {
if (i in this && !fn.call(context, this[i], i, this)) {
return false;
}
}
return true;
};
}
if (!Array.prototype.some) {
Array.prototype.some = function(fn, context) {
for (var i = 0, len = this.length >>> 0; i < len; i++) {
if (i in this && fn.call(context, this[i], i, this)) {
return true;
}
}
return false;
};
}
if (!Array.prototype.filter) {
Array.prototype.filter = function(fn, context) {
var result = [ ], val;
for (var i = 0, len = this.length >>> 0; i < len; i++) {
if (i in this) {
val = this[i]; // in case fn mutates this
if (fn.call(context, val, i, this)) {
result.push(val);
}
}
}
return result;
};
}
if (!Array.prototype.reduce) {
Array.prototype.reduce = function(fn /*, initial*/) {
var len = this.length >>> 0,
i = 0,
rv;
if (arguments.length > 1) {
rv = arguments[1];
}
else {
do {
if (i in this) {
rv = this[i++];
break;
}
// if array contains no values, no initial value to return
if (++i >= len) {
throw new TypeError();
}
}
while (true);
}
for (; i < len; i++) {
if (i in this) {
rv = fn.call(null, rv, this[i], i, this);
}
}
return rv;
};
}
/**
* Invokes method on all items in a given array
* @method invoke
* @memberOf fabric.util.array
* @param {Array} array Array to iterate over
* @param {String} method Name of a method to invoke
*/
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)
* @method max
* @memberOf fabric.util.array
* @param {Array} array Array to iterate over
* @param {String} byProperty
*/
function max(array, byProperty) {
if (!array || array.length === 0) return undefined;
var i = array.length - 1,
result = byProperty ? array[i][byProperty] : array[i];
if (byProperty) {
while (i--) {
if (array[i][byProperty] >= result) {
result = array[i][byProperty];
}
}
}
else {
while (i--) {
if (array[i] >= result) {
result = array[i];
}
}
}
return result;
}
/**
* Finds minimum value in array (not necessarily "first" one)
* @method min
* @memberOf fabric.util.array
* @param {Array} array Array to iterate over
* @param {String} byProperty
*/
function min(array, byProperty) {
if (!array || array.length === 0) return undefined;
var i = array.length - 1,
result = byProperty ? array[i][byProperty] : array[i];
if (byProperty) {
while (i--) {
if (array[i][byProperty] < result) {
result = array[i][byProperty];
}
}
}
else {
while (i--) {
if (array[i] < result) {
result = array[i];
}
}
}
return result;
}
/** @namespace */
fabric.util.array = {
invoke: invoke,
min: min,
max: max
};
})();
(function(){
/**
* Copies all enumerable properties of one object to another
* @memberOf fabric.util.object
* @method extend
* @param {Object} destination Where to copy to
* @param {Object} source Where to copy from
*/
function extend(destination, source) {
// JScript DontEnum bug is not taken care of
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
* @method clone
* @memberOf fabric.util.object
* @param {Object} object Object to clone
*/
function clone(object) {
return extend({ }, object);
}
/** @namespace fabric.util.object */
fabric.util.object = {
extend: extend,
clone: clone
};
})();
(function() {
if (!String.prototype.trim) {
/**
* Trims a string (removing whitespace from the beginning and the end)
* @method trim
* @see String#trim on MDN
*/
String.prototype.trim = function () {
// this trim is not fully ES3 or ES5 compliant, but it should cover most cases for now
return this.replace(/^[\s\xA0]+/, '').replace(/[\s\xA0]+$/, '');
};
}
/**
* Camelizes a string
* @memberOf fabric.util.string
* @method camelize
* @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
* @method capitalize
* @param {String} string String to capitalize
* @return {String} Capitalized version of a string
*/
function capitalize(string) {
return string.charAt(0).toUpperCase() + string.slice(1).toLowerCase();
}
function escapeXml(string) {
return string.replace(/&/g, '&')
.replace(/"/g, '"')
.replace(/'/g, ''')
.replace(//g, '>');
}
/** @namespace */
fabric.util.string = {
camelize: camelize,
capitalize: capitalize,
escapeXml: escapeXml
};
}());
(function() {
var slice = Array.prototype.slice,
apply = Function.prototype.apply,
Dummy = function() { };
if (!Function.prototype.bind) {
/**
* Cross-browser approximation of ES5 Function.prototype.bind (not fully spec conforming)
* @see Function#bind on MDN
* @param {Object} thisArg Object to bind function to
* @param {Any[]} [...] Values to pass to a bound function
* @return {Function}
*/
Function.prototype.bind = function(thisArg) {
var fn = this, args = slice.call(arguments, 1), bound;
if (args.length) {
bound = function() {
return apply.call(fn, this instanceof Dummy ? this : thisArg, args.concat(slice.call(arguments)));
};
}
else {
bound = function() {
return apply.call(fn, this instanceof Dummy ? this : thisArg, arguments);
};
}
Dummy.prototype = this.prototype;
bound.prototype = new Dummy();
return bound;
};
}
})();
(function() {
var slice = Array.prototype.slice, emptyFunction = function() { };
var IS_DONTENUM_BUGGY = (function(){
for (var p in { toString: 1 }) {
if (p === 'toString') return false;
}
return true;
})();
/** @ignore */
var addMethods = function(klass, source, parent) {
for (var property in source) {
if (property in klass.prototype && typeof klass.prototype[property] === 'function') {
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() { }
/**
* Helper for creation of "classes"
* @method createClass
* @memberOf fabric.util
*/
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;
return klass;
}
fabric.util.createClass = createClass;
})();
(function () {
/* EVENT HANDLING */
function areHostMethods(object) {
var methodNames = Array.prototype.slice.call(arguments, 1),
t, i, len = methodNames.length;
for (i = 0; i < len; i++) {
t = typeof object[methodNames[i]];
if (!(/^(?:function|object|unknown)$/).test(t)) return false;
}
return true;
}
var getUniqueId = (function () {
if (typeof fabric.document.documentElement.uniqueID !== 'undefined') {
return function (element) {
return element.uniqueID;
};
}
var uid = 0;
return function (element) {
return element.__uniqueID || (element.__uniqueID = 'uniqueID__' + uid++);
};
})();
/** @ignore */
var getElement, setElement;
(function () {
var elements = { };
/** @ignore */
getElement = function (uid) {
return elements[uid];
};
/** @ignore */
setElement = function (uid, element) {
elements[uid] = element;
};
})();
function createListener(uid, handler) {
return {
handler: handler,
wrappedHandler: createWrappedHandler(uid, handler)
};
}
function createWrappedHandler(uid, handler) {
return function (e) {
handler.call(getElement(uid), e || fabric.window.event);
};
}
function createDispatcher(uid, eventName) {
return function (e) {
if (handlers[uid] && handlers[uid][eventName]) {
var handlersForEvent = handlers[uid][eventName];
for (var i = 0, len = handlersForEvent.length; i < len; i++) {
handlersForEvent[i].call(this, e || fabric.window.event);
}
}
};
}
var shouldUseAddListenerRemoveListener = (
areHostMethods(fabric.document.documentElement, 'addEventListener', 'removeEventListener') &&
areHostMethods(fabric.window, 'addEventListener', 'removeEventListener')),
shouldUseAttachEventDetachEvent = (
areHostMethods(fabric.document.documentElement, 'attachEvent', 'detachEvent') &&
areHostMethods(fabric.window, 'attachEvent', 'detachEvent')),
// IE branch
listeners = { },
// DOM L0 branch
handlers = { },
addListener, removeListener;
if (shouldUseAddListenerRemoveListener) {
/** @ignore */
addListener = function (element, eventName, handler) {
element.addEventListener(eventName, handler, false);
};
/** @ignore */
removeListener = function (element, eventName, handler) {
element.removeEventListener(eventName, handler, false);
};
}
else if (shouldUseAttachEventDetachEvent) {
/** @ignore */
addListener = function (element, eventName, handler) {
var uid = getUniqueId(element);
setElement(uid, element);
if (!listeners[uid]) {
listeners[uid] = { };
}
if (!listeners[uid][eventName]) {
listeners[uid][eventName] = [ ];
}
var listener = createListener(uid, handler);
listeners[uid][eventName].push(listener);
element.attachEvent('on' + eventName, listener.wrappedHandler);
};
/** @ignore */
removeListener = function (element, eventName, handler) {
var uid = getUniqueId(element), listener;
if (listeners[uid] && listeners[uid][eventName]) {
for (var i = 0, len = listeners[uid][eventName].length; i < len; i++) {
listener = listeners[uid][eventName][i];
if (listener && listener.handler === handler) {
element.detachEvent('on' + eventName, listener.wrappedHandler);
listeners[uid][eventName][i] = null;
}
}
}
};
}
else {
/** @ignore */
addListener = function (element, eventName, handler) {
var uid = getUniqueId(element);
if (!handlers[uid]) {
handlers[uid] = { };
}
if (!handlers[uid][eventName]) {
handlers[uid][eventName] = [ ];
var existingHandler = element['on' + eventName];
if (existingHandler) {
handlers[uid][eventName].push(existingHandler);
}
element['on' + eventName] = createDispatcher(uid, eventName);
}
handlers[uid][eventName].push(handler);
};
/** @ignore */
removeListener = function (element, eventName, handler) {
var uid = getUniqueId(element);
if (handlers[uid] && handlers[uid][eventName]) {
var handlersForEvent = handlers[uid][eventName];
for (var i = 0, len = handlersForEvent.length; i < len; i++) {
if (handlersForEvent[i] === handler) {
handlersForEvent.splice(i, 1);
}
}
}
};
}
/**
* Adds an event listener to an element
* @mthod addListener
* @memberOf fabric.util
* @function
* @param {HTMLElement} element
* @param {String} eventName
* @param {Function} handler
*/
fabric.util.addListener = addListener;
/**
* Removes an event listener from an element
* @mthod removeListener
* @memberOf fabric.util
* @function
* @param {HTMLElement} element
* @param {String} eventName
* @param {Function} handler
*/
fabric.util.removeListener = removeListener;
/**
* Cross-browser wrapper for getting event's coordinates
* @method getPointer
* @memberOf fabric.util
* @param {Event} event
*/
function getPointer(event) {
var element = event.target || event.srcElement,
scrollLeft = 0,
scrollTop = 0,
firstFixedAncestor;
while (element && element.parentNode && !firstFixedAncestor) {
element = element.parentNode;
if (element !== fabric.document && fabric.util.getElementPosition(element) === 'fixed') firstFixedAncestor = element;
scrollLeft += element.scrollLeft || 0;
scrollTop += element.scrollTop || 0;
}
return {
x: event.clientX + scrollLeft,
y: event.clientY + scrollTop
};
}
var pointerX = function(event) {
var docElement = fabric.document.documentElement,
body = fabric.document.body || { scrollLeft: 0 };
// looks like in IE (<9) clientX at certain point (apparently when mouseup fires on VML element)
// is represented as COM object, with all the consequences, like "unknown" type and error on [[Get]]
// need to investigate later
return event.pageX || ((typeof event.clientX !== 'unknown' ? event.clientX : 0) +
(docElement.scrollLeft || body.scrollLeft) -
(docElement.clientLeft || 0));
};
var pointerY = function(event) {
var docElement = fabric.document.documentElement,
body = fabric.document.body || { scrollTop: 0 };
return event.pageY || ((typeof event.clientY !== 'unknown' ? event.clientY : 0) +
(docElement.scrollTop || body.scrollTop) -
(docElement.clientTop || 0));
};
if (fabric.isTouchSupported) {
pointerX = function(event) {
return event.touches && event.touches[0] && event.touches[0].pageX || event.clientX;
};
pointerY = function(event) {
return event.touches && event.touches[0] && event.touches[0].pageY || event.clientY;
};
}
fabric.util.getPointer = getPointer;
fabric.util.object.extend(fabric.util, fabric.Observable);
})();
(function () {
/**
* Cross-browser wrapper for setting element's style
* @method setStyle
* @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)
* @method getById
* @memberOf fabric.util
* @param {String|HTMLElement} id
* @return {HTMLElement|null}
*/
function getById(id) {
return typeof id === 'string' ? fabric.document.getElementById(id) : id;
}
/**
* Converts an array-like object (e.g. arguments or NodeList) to an array
* @method toArray
* @memberOf fabric.util
* @param {Object} arrayLike
* @return {Array}
*/
var toArray = function(arrayLike) {
return _slice.call(arrayLike, 0);
};
var sliceCanConvertNodelists;
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
* @method makeElement
* @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
* @method addClass
* @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.className + ' ').indexOf(' ' + className + ' ') === -1) {
element.className += (element.className ? ' ' : '') + className;
}
}
/**
* Wraps element with another element
* @method wrapElement
* @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 offset for a given element
* @method getElementOffset
* @function
* @memberOf fabric.util
* @param {HTMLElement} element Element to get offset for
* @return {Object} Object with "left" and "top" properties
*/
function getElementOffset(element) {
// TODO (kangax): need to fix this method
var valueT = 0, valueL = 0;
do {
valueT += element.offsetTop || 0;
valueL += element.offsetLeft || 0;
element = element.offsetParent;
}
while (element);
return ({ left: valueL, top: valueT });
}
/**
* Returns position of a given element
* @method getElementPosition
* @function
* @memberOf fabric.util
* @param {HTMLElement} element Element to get offset for
* @return {Object} position of the given element.
*/
var getElementPosition;
if (fabric.document.defaultView && fabric.document.defaultView.getComputedStyle) {
getElementPosition = function (element) {
return fabric.document.defaultView.getComputedStyle(element).position;
};
}
else {
getElementPosition = function (element) {
var value = element.style.position;
if (!value && element.currentStyle) value = element.currentStyle.position;
return value;
};
}
(function () {
var style = fabric.document.documentElement.style;
var selectProp = 'userSelect' in style
? 'userSelect'
: 'MozUserSelect' in style
? 'MozUserSelect'
: 'WebkitUserSelect' in style
? 'WebkitUserSelect'
: 'KhtmlUserSelect' in style
? 'KhtmlUserSelect'
: '';
/**
* Makes element unselectable
* @method makeElementUnselectable
* @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
* @method makeElementSelectable
* @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
* @method getScript
* @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;
scriptEl.type = 'text/javascript';
scriptEl.setAttribute('runat', 'server');
/** @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;
})();
fabric.util.getById = getById;
fabric.util.toArray = toArray;
fabric.util.makeElement = makeElement;
fabric.util.addClass = addClass;
fabric.util.wrapElement = wrapElement;
fabric.util.getElementOffset = getElementOffset;
fabric.util.getElementPosition = getElementPosition;
})();
(function(){
function addParamToUrl(url, param) {
return url + (/\?/.test(url) ? '&' : '?') + param;
}
var makeXHR = (function() {
var factories = [
function() { return new ActiveXObject("Microsoft.XMLHTTP"); },
function() { return new ActiveXObject("Msxml2.XMLHTTP"); },
function() { return new ActiveXObject("Msxml2.XMLHTTP.3.0"); },
function() { return new XMLHttpRequest(); }
];
for (var i = factories.length; i--; ) {
try {
var req = factories[i]();
if (req) {
return factories[i];
}
}
catch (err) { }
}
})();
function emptyFn() { }
/**
* Cross-browser abstraction for sending XMLHttpRequest
* @method request
* @memberOf fabric.util
* @param {String} url URL to send XMLHttpRequest to
* @param {Object} [options] Options object
* @param {String} [options.method="GET"]
* @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 = makeXHR(),
body;
/** @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;
})();
(function() {
/**
* @method easeInQuad
* @memberOf fabric.util.ease
*/
function easeInQuad(t, b, c, d) {
return c*(t/=d)*t + b;
}
/**
* @method easeOutQuad
* @memberOf fabric.util.ease
*/
function easeOutQuad(t, b, c, d) {
return -c *(t/=d)*(t-2) + b;
}
/**
* @method easeInOutQuad
* @memberOf fabric.util.ease
*/
function easeInOutQuad(t, b, c, d) {
t /= (d/2);
if (t < 1) return c/2*t*t + b;
return -c/2 * ((--t)*(t-2) - 1) + b;
}
/**
* @method easeInCubic
* @memberOf fabric.util.ease
*/
function easeInCubic(t, b, c, d) {
return c*(t/=d)*t*t + b;
}
/**
* @method easeOutCubic
* @memberOf fabric.util.ease
*/
function easeOutCubic(t, b, c, d) {
return c*((t=t/d-1)*t*t + 1) + b;
}
/**
* @method easeInOutCubic
* @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;
}
/**
* @method easeInQuart
* @memberOf fabric.util.ease
*/
function easeInQuart(t, b, c, d) {
return c*(t/=d)*t*t*t + b;
}
/**
* @method easeOutQuart
* @memberOf fabric.util.ease
*/
function easeOutQuart(t, b, c, d) {
return -c * ((t=t/d-1)*t*t*t - 1) + b;
}
/**
* @method easeInOutQuart
* @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;
}
/**
* @method easeInQuint
* @memberOf fabric.util.ease
*/
function easeInQuint(t, b, c, d) {
return c*(t/=d)*t*t*t*t + b;
}
/**
* @method easeOutQuint
* @memberOf fabric.util.ease
*/
function easeOutQuint(t, b, c, d) {
return c*((t=t/d-1)*t*t*t*t + 1) + b;
}
/**
* @method easeInOutQuint
* @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;
}
/**
* @method easeInSine
* @memberOf fabric.util.ease
*/
function easeInSine(t, b, c, d) {
return -c * Math.cos(t/d * (Math.PI/2)) + c + b;
}
/**
* @method easeOutSine
* @memberOf fabric.util.ease
*/
function easeOutSine(t, b, c, d) {
return c * Math.sin(t/d * (Math.PI/2)) + b;
}
/**
* @method easeInOutSine
* @memberOf fabric.util.ease
*/
function easeInOutSine(t, b, c, d) {
return -c/2 * (Math.cos(Math.PI*t/d) - 1) + b;
}
/**
* @method easeInExpo
* @memberOf fabric.util.ease
*/
function easeInExpo(t, b, c, d) {
return (t===0) ? b : c * Math.pow(2, 10 * (t/d - 1)) + b;
}
/**
* @method easeOutExpo
* @memberOf fabric.util.ease
*/
function easeOutExpo(t, b, c, d) {
return (t===d) ? b+c : c * (-Math.pow(2, -10 * t/d) + 1) + b;
}
/**
* @method easeInOutExpo
* @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;
}
/**
* @method easeInCirc
* @memberOf fabric.util.ease
*/
function easeInCirc(t, b, c, d) {
return -c * (Math.sqrt(1 - (t/=d)*t) - 1) + b;
}
/**
* @method easeOutCirc
* @memberOf fabric.util.ease
*/
function easeOutCirc(t, b, c, d) {
return c * Math.sqrt(1 - (t=t/d-1)*t) + b;
}
/**
* @method easeInOutCirc
* @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;
}
/**
* @method easeInElastic
* @memberOf fabric.util.ease
*/
function easeInElastic(t, b, c, d) {
var s=1.70158;var p=0;var a=c;
if (t===0) return b;
t /= d;
if (t===1) return b+c;
if (!p) p=d*0.3;
if (a < Math.abs(c)) { a=c; s=p/4; }
else s = p/(2*Math.PI) * Math.asin (c/a);
return -(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b;
}
/**
* @method easeOutElastic
* @memberOf fabric.util.ease
*/
function easeOutElastic(t, b, c, d) {
var s=1.70158;var p=0;var a=c;
if (t===0) return b;
t /= d;
if (t===1) return b+c;
if (!p) p=d*0.3;
if (a < Math.abs(c)) { a=c; s=p/4; }
else s = p/(2*Math.PI) * Math.asin (c/a);
return a*Math.pow(2,-10*t) * Math.sin( (t*d-s)*(2*Math.PI)/p ) + c + b;
}
/**
* @method easeInOutElastic
* @memberOf fabric.util.ease
*/
function easeInOutElastic(t, b, c, d) {
var s=1.70158;var p=0;var a=c;
if (t===0) return b;
t /= d/2;
if (t===2) return b+c;
if (!p) p=d*(0.3*1.5);
if (a < Math.abs(c)) { a=c; s=p/4; }
else s = p/(2*Math.PI) * Math.asin (c/a);
if (t < 1) return -0.5*(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b;
return a*Math.pow(2,-10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )*0.5 + c + b;
}
/**
* @method easeInBack
* @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;
}
/**
* @method easeOutBack
* @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;
}
/**
* @method easeInOutBack
* @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;
}
/**
* @method easeInBounce
* @memberOf fabric.util.ease
*/
function easeInBounce(t, b, c, d) {
return c - easeOutBounce (d-t, 0, c, d) + b;
}
/**
* @method easeOutBounce
* @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;
}
}
/**
* @method easeInOutBounce
* @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;
}
/** @namespace fabric.util.ease */
fabric.util.ease = {
easeInQuad: easeInQuad,
easeOutQuad: easeOutQuad,
easeInOutQuad: easeInOutQuad,
easeInCubic: easeInCubic,
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,
capitalize = fabric.util.string.capitalize,
clone = fabric.util.object.clone;
var attributesMap = {
'cx': 'left',
'x': 'left',
'cy': 'top',
'y': 'top',
'r': 'radius',
'fill-opacity': 'opacity',
'fill-rule': 'fillRule',
'stroke-width': 'strokeWidth',
'transform': 'transformMatrix',
'text-decoration': 'textDecoration',
'font-size': 'fontSize',
'font-weight': 'fontWeight',
'font-style': 'fontStyle',
'font-family': 'fontFamily'
};
function normalizeAttr(attr) {
// transform attribute names
if (attr in attributesMap) {
return attributesMap[attr];
}
return attr;
}
/**
* Returns an object of attributes' name/value, given element and an array of attribute names;
* Parses parent "g" nodes recursively upwards.
* @static
* @memberOf fabric
* @method parseAttributes
* @param {DOMElement} element Element to parse
* @param {Array} attributes Array of attributes to parse
* @return {Object} object containing parsed attributes' names/values
*/
function parseAttributes(element, attributes) {
if (!element) {
return;
}
var value,
parsed,
parentAttributes = { };
// if there's a parent container (`g` node), parse its attributes recursively upwards
if (element.parentNode && /^g$/i.test(element.parentNode.nodeName)) {
parentAttributes = fabric.parseAttributes(element.parentNode, attributes);
}
var ownAttributes = attributes.reduce(function(memo, attr) {
value = element.getAttribute(attr);
parsed = parseFloat(value);
if (value) {
// "normalize" attribute values
if ((attr === 'fill' || attr === 'stroke') && value === 'none') {
value = '';
}
if (attr === 'fill-rule') {
value = (value === 'evenodd') ? 'destination-over' : value;
}
if (attr === 'transform') {
value = fabric.parseTransformAttribute(value);
}
attr = normalizeAttr(attr);
memo[attr] = isNaN(parsed) ? value : parsed;
}
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), fabric.parseStyleAttribute(element)));
return extend(parentAttributes, ownAttributes);
}
/**
* Parses "transform" attribute, returning an array of values
* @static
* @function
* @memberOf fabric
* @method parseTransformAttribute
* @param attributeValue {String} string containing attribute value
* @return {Array} array of 6 elements representing transformation matrix
*/
fabric.parseTransformAttribute = (function() {
function rotateMatrix(matrix, args) {
var angle = args[0];
matrix[0] = Math.cos(angle);
matrix[1] = Math.sin(angle);
matrix[2] = -Math.sin(angle);
matrix[3] = Math.cos(angle);
}
function scaleMatrix(matrix, args) {
var multiplierX = args[0],
multiplierY = (args.length === 2) ? args[1] : args[0];
matrix[0] = multiplierX;
matrix[3] = multiplierY;
}
function skewXMatrix(matrix, args) {
matrix[2] = args[0];
}
function skewYMatrix(matrix, args) {
matrix[1] = args[0];
}
function translateMatrix(matrix, args) {
matrix[4] = args[0];
if (args.length === 2) {
matrix[5] = args[1];
}
}
// identity matrix
var iMatrix = [
1, // a
0, // b
0, // c
1, // d
0, // e
0 // f
],
// == begin transform regexp
number = '(?:[-+]?\\d+(?:\\.\\d+)?(?:e[-+]?\\d+)?)',
comma_wsp = '(?:\\s+,?\\s*|,\\s*)',
skewX = '(?:(skewX)\\s*\\(\\s*(' + number + ')\\s*\\))',
skewY = '(?:(skewY)\\s*\\(\\s*(' + number + ')\\s*\\))',
rotate = '(?:(rotate)\\s*\\(\\s*(' + number + ')(?:' + comma_wsp + '(' + number + ')' + comma_wsp + '(' + number + '))?\\s*\\))',
scale = '(?:(scale)\\s*\\(\\s*(' + number + ')(?:' + comma_wsp + '(' + number + '))?\\s*\\))',
translate = '(?:(translate)\\s*\\(\\s*(' + number + ')(?:' + comma_wsp + '(' + number + '))?\\s*\\))',
matrix = '(?:(matrix)\\s*\\(\\s*' +
'(' + number + ')' + comma_wsp +
'(' + number + ')' + comma_wsp +
'(' + number + ')' + comma_wsp +
'(' + number + ')' + comma_wsp +
'(' + number + ')' + comma_wsp +
'(' + number + ')' +
'\\s*\\))',
transform = '(?:' +
matrix + '|' +
translate + '|' +
scale + '|' +
rotate + '|' +
skewX + '|' +
skewY +
')',
transforms = '(?:' + transform + '(?:' + comma_wsp + transform + ')*' + ')',
transform_list = '^\\s*(?:' + transforms + '?)\\s*$',
// http://www.w3.org/TR/SVG/coords.html#TransformAttribute
reTransformList = new RegExp(transform_list),
// == end transform regexp
reTransform = new RegExp(transform);
return function(attributeValue) {
// start with identity matrix
var matrix = iMatrix.concat();
// 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) {
return (match !== '' && match != null);
}),
operation = m[1],
args = m.slice(2).map(parseFloat);
switch(operation) {
case 'translate':
translateMatrix(matrix, args);
break;
case 'rotate':
rotateMatrix(matrix, args);
break;
case 'scale':
scaleMatrix(matrix, args);
break;
case 'skewX':
skewXMatrix(matrix, args);
break;
case 'skewY':
skewYMatrix(matrix, args);
break;
case 'matrix':
matrix = args;
break;
}
});
return matrix;
};
})();
/**
* Parses "points" attribute, returning an array of values
* @static
* @memberOf fabric
* @method parsePointsAttribute
* @param points {String} points attribute string
* @return {Array} array of points
*/
function parsePointsAttribute(points) {
// points attribute is required and must not be empty
if (!points) return null;
points = points.trim();
var asPairs = points.indexOf(',') > -1;
points = points.split(/\s+/);
var parsedPoints = [ ], i, len;
// points could look like "10,20 30,40" or "10 20 30 40"
if (asPairs) {
i = 0;
len = points.length;
for (; i < len; i++) {
var pair = points[i].split(',');
parsedPoints.push({ x: parseFloat(pair[0]), y: parseFloat(pair[1]) });
}
}
else {
i = 0;
len = points.length;
for (; 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;
}
/**
* Parses "style" attribute, retuning an object with values
* @static
* @memberOf fabric
* @method parseStyleAttribute
* @param {SVGElement} element Element to parse
* @return {Object} Objects with values parsed from style attribute of an element
*/
function parseStyleAttribute(element) {
var oStyle = { },
style = element.getAttribute('style');
if (!style) return oStyle;
if (typeof style === 'string') {
style = style.replace(/;$/, '').split(';').forEach(function (current) {
var attr = current.split(':');
oStyle[normalizeAttr(attr[0].trim().toLowerCase())] = attr[1].trim();
});
}
else {
for (var prop in style) {
if (typeof style[prop] === 'undefined') continue;
oStyle[normalizeAttr(prop.toLowerCase())] = style[prop];
}
}
return oStyle;
}
function resolveGradients(instances) {
for (var i = instances.length; i--; ) {
var instanceFillValue = instances[i].get('fill');
if (/^url\(/.test(instanceFillValue)) {
var gradientId = instanceFillValue.slice(5, instanceFillValue.length - 1);
if (fabric.gradientDefs[gradientId]) {
instances[i].set('fill',
fabric.Gradient.fromElement(fabric.gradientDefs[gradientId], instances[i]));
}
}
}
}
/**
* Transforms an array of svg elements to corresponding fabric.* instances
* @static
* @memberOf fabric
* @method parseElements
* @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.
*/
function parseElements(elements, callback, options, reviver) {
var instances = new Array(elements.length), i = elements.length;
function checkIfDone() {
if (--i === 0) {
instances = instances.filter(function(el) {
return el != null;
});
resolveGradients(instances);
callback(instances);
}
}
for (var index = 0, el, len = elements.length; index < len; index++) {
el = elements[index];
var klass = fabric[capitalize(el.tagName)];
if (klass && klass.fromElement) {
try {
if (klass.async) {
klass.fromElement(el, (function(index, el) {
return function(obj) {
reviver && reviver(el, obj);
instances.splice(index, 0, obj);
checkIfDone();
};
})(index), options);
}
else {
var obj = klass.fromElement(el, options);
reviver && reviver(el, obj);
instances.splice(index, 0, obj);
checkIfDone();
}
}
catch(e) {
fabric.log(e.message || e);
}
}
else {
checkIfDone();
}
}
}
/**
* Returns CSS rules for a given SVG document
* @static
* @function
* @memberOf fabric
* @method getCSSRules
* @param {SVGDocument} doc SVG document to parse
* @return {Object} CSS rules of this document
*/
function getCSSRules(doc) {
var styles = doc.getElementsByTagName('style'),
allRules = { },
rules;
// very crude parsing of style contents
for (var i = 0, len = styles.length; i < len; i++) {
var styleContents = styles[0].textContent;
// remove comments
styleContents = styleContents.replace(/\/\*[\s\S]*?\*\//g, '');
rules = styleContents.match(/[^{]*\{[\s\S]*?\}/g);
rules = rules.map(function(rule) { return rule.trim(); });
rules.forEach(function(rule) {
var match = rule.match(/([\s\S]*?)\s*\{([^}]*)\}/);
rule = match[1];
var declaration = match[2].trim(),
propertyValuePairs = declaration.replace(/;$/, '').split(/\s*;\s*/);
if (!allRules[rule]) {
allRules[rule] = { };
}
for (var i = 0, len = propertyValuePairs.length; i < len; i++) {
var pair = propertyValuePairs[i].split(/\s*:\s*/),
property = pair[0],
value = pair[1];
allRules[rule][property] = value;
}
});
}
return allRules;
}
function getGlobalStylesForElement(element) {
var nodeName = element.nodeName,
className = element.getAttribute('class'),
id = element.getAttribute('id'),
styles = { };
for (var rule in fabric.cssRules) {
var ruleMatchesElement = (className && new RegExp('^\\.' + className).test(rule)) ||
(id && new RegExp('^#' + id).test(rule)) ||
(new RegExp('^' + nodeName).test(rule));
if (ruleMatchesElement) {
for (var property in fabric.cssRules[rule]) {
styles[property] = fabric.cssRules[rule][property];
}
}
}
return styles;
}
/**
* Parses an SVG document, converts it to an array of corresponding fabric.* instances and passes them to a callback
* @static
* @function
* @memberOf fabric
* @method parseSVGDocument
* @param {SVGDocument} doc SVG document to parse
* @param {Function} callback Callback to call when parsing is finished; It's being passed an array of elements (parsed from a document).
* @param {Function} [reviver] Method for further parsing of SVG elements, called after each fabric object created.
*/
fabric.parseSVGDocument = (function() {
var reAllowedSVGTagNames = /^(path|circle|polygon|polyline|ellipse|rect|line|image|text)$/;
// http://www.w3.org/TR/SVG/coords.html#ViewBoxAttribute
// \d doesn't quite cut it (as we need to match an actual float number)
// matches, e.g.: +14.56e-12, etc.
var reNum = '(?:[-+]?\\d+(?:\\.\\d+)?(?:e[-+]?\\d+)?)';
var reViewBoxAttrValue = new RegExp(
'^' +
'\\s*(' + reNum + '+)\\s*,?' +
'\\s*(' + reNum + '+)\\s*,?' +
'\\s*(' + reNum + '+)\\s*,?' +
'\\s*(' + reNum + '+)\\s*' +
'$'
);
function hasAncestorWithNodeName(element, nodeName) {
while (element && (element = element.parentNode)) {
if (nodeName.test(element.nodeName)) {
return true;
}
}
return false;
}
return function(doc, callback, reviver) {
if (!doc) return;
var startTime = new Date(),
descendants = fabric.util.toArray(doc.getElementsByTagName('*'));
if (descendants.length === 0) {
// we're likely in node, where "o3-xml" library fails to gEBTN("*")
// https://github.com/ajaxorg/node-o3-xml/issues/21
descendants = doc.selectNodes("//*[name(.)!='svg']");
var arr = [ ];
for (var i = 0, len = descendants.length; i < len; i++) {
arr[i] = descendants[i];
}
descendants = arr;
}
var elements = descendants.filter(function(el) {
return reAllowedSVGTagNames.test(el.tagName) &&
!hasAncestorWithNodeName(el, /^(?:pattern|defs)$/); // http://www.w3.org/TR/SVG/struct.html#DefsElement
});
if (!elements || (elements && !elements.length)) return;
var viewBoxAttr = doc.getAttribute('viewBox'),
widthAttr = doc.getAttribute('width'),
heightAttr = doc.getAttribute('height'),
width = null,
height = null,
minX,
minY;
if (viewBoxAttr && (viewBoxAttr = viewBoxAttr.match(reViewBoxAttrValue))) {
minX = parseInt(viewBoxAttr[1], 10);
minY = parseInt(viewBoxAttr[2], 10);
width = parseInt(viewBoxAttr[3], 10);
height = parseInt(viewBoxAttr[4], 10);
}
// values of width/height attributes overwrite those extracted from viewbox attribute
width = widthAttr ? parseFloat(widthAttr) : width;
height = heightAttr ? parseFloat(heightAttr) : height;
var options = {
width: width,
height: height
};
fabric.gradientDefs = fabric.getGradientDefs(doc);
fabric.cssRules = getCSSRules(doc);
// Precedence of rules: style > class > attribute
fabric.parseElements(elements, function(instances) {
fabric.documentParsingTime = new Date() - startTime;
if (callback) {
callback(instances, options);
}
}, clone(options), reviver);
};
})();
/**
* Used for caching SVG documents (loaded via `fabric.Canvas#loadSVGFromURL`)
* @property
* @namespace
*/
var svgCache = {
/**
* @method has
* @param {String} name
* @param {Function} callback
*/
has: function (name, callback) {
callback(false);
},
/**
* @method get
* @param {String} url
* @param {Function} callback
*/
get: function () {
/* NOOP */
},
/**
* @method set
* @param {String} url
* @param {Object} object
*/
set: function () {
/* NOOP */
}
};
/**
* Takes url corresponding to an SVG document, and parses it into a set of fabric objects
* @method loadSVGFromURL
* @param {String} url
* @param {Function} callback
* @param {Function} [reviver] Method for further parsing of SVG elements, called after each fabric object created.
*/
function loadSVGFromURL(url, callback, reviver) {
url = url.replace(/^\n\s*/, '').trim();
svgCache.has(url, function (hasUrl) {
if (hasUrl) {
svgCache.get(url, function (value) {
var enlivedRecord = _enlivenCachedObject(value);
callback(enlivedRecord.objects, enlivedRecord.options);
});
}
else {
new fabric.util.request(url, {
method: 'get',
onComplete: onComplete
});
}
});
function onComplete(r) {
var xml = r.responseXML;
if (!xml.documentElement && fabric.window.ActiveXObject && r.responseText) {
xml = new ActiveXObject('Microsoft.XMLDOM');
xml.async = 'false';
//IE chokes on DOCTYPE
xml.loadXML(r.responseText.replace(//i,''));
}
if (!xml.documentElement) return;
fabric.parseSVGDocument(xml.documentElement, function (results, options) {
svgCache.set(url, {
objects: fabric.util.array.invoke(results, 'toObject'),
options: options
});
callback(results, options);
}, reviver);
}
}
/**
* @method _enlivenCachedObject
*/
function _enlivenCachedObject(cachedObject) {
var objects = cachedObject.objects,
options = cachedObject.options;
objects = objects.map(function (o) {
return fabric[capitalize(o.type)].fromObject(o);
});
return ({ objects: objects, options: options });
}
/**
* Takes string corresponding to an SVG document, and parses it into a set of fabric objects
* @method loadSVGFromString
* @param {String} string
* @param {Function} callback
* @param {Function} [reviver] Method for further parsing of SVG elements, called after each fabric object created.
*/
function loadSVGFromString(string, callback, reviver) {
string = string.trim();
var doc;
if (typeof DOMParser !== 'undefined') {
var parser = new 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(//i,''));
}
fabric.parseSVGDocument(doc.documentElement, function (results, options) {
callback(results, options);
}, reviver);
}
function createSVGFontFacesMarkup(objects) {
var markup = '';
for (var i = 0, len = objects.length; i < len; i++) {
if (objects[i].type !== 'text' || !objects[i].path) continue;
markup += [
'@font-face {',
'font-family: ', objects[i].fontFamily, '; ',
'src: url(\'', objects[i].path, '\')',
'}'
].join('');
}
if (markup) {
markup = [
'',
'',
''
].join('');
}
return markup;
}
extend(fabric, {
parseAttributes: parseAttributes,
parseElements: parseElements,
parseStyleAttribute: parseStyleAttribute,
parsePointsAttribute: parsePointsAttribute,
getCSSRules: getCSSRules,
loadSVGFromURL: loadSVGFromURL,
loadSVGFromString: loadSVGFromString,
createSVGFontFacesMarkup: createSVGFontFacesMarkup
});
})(typeof exports !== 'undefined' ? exports : this);
(function() {
function getColorStopFromStyle(el) {
var style = el.getAttribute('style');
if (style) {
var keyValuePairs = style.split(/\s*;\s*/);
if (keyValuePairs[keyValuePairs.length-1] === '') {
keyValuePairs.pop();
}
for (var i = keyValuePairs.length; i--; ) {
var split = keyValuePairs[i].split(/\s*:\s*/),
key = split[0].trim(),
value = split[1].trim();
if (key === 'stop-color') {
return value;
}
}
}
}
/**
* @class Object
* @memberOf fabric
*/
fabric.Gradient = fabric.util.createClass(/** @scope fabric.Gradient.prototype */ {
initialize: function(options) {
options || (options = { });
this.x1 = options.x1 || 0;
this.y1 = options.y1 || 0;
this.x2 = options.x2 || 0;
this.y2 = options.y2 || 0;
this.colorStops = options.colorStops;
},
toObject: function() {
return {
x1: this.x1,
x2: this.x2,
y1: this.y1,
y2: this.y2,
colorStops: this.colorStops
};
},
toLiveGradient: function(ctx) {
var gradient = ctx.createLinearGradient(
this.x1, this.y1, this.x2 || ctx.canvas.width, this.y2);
for (var position in this.colorStops) {
var colorValue = this.colorStops[position];
gradient.addColorStop(parseFloat(position), colorValue);
}
return gradient;
}
});
fabric.util.object.extend(fabric.Gradient, {
/**
* @method fromElement
* @static
* @see http://www.w3.org/TR/SVG/pservers.html#LinearGradientElement
*/
fromElement: function(el, instance) {
/**
* @example:
*
*
*
*
*
*
* OR
*
*
*
*
*
*
*/
var colorStopEls = el.getElementsByTagName('stop'),
offset,
colorStops = { },
coords = {
x1: el.getAttribute('x1') || 0,
y1: el.getAttribute('y1') || 0,
x2: el.getAttribute('x2') || '100%',
y2: el.getAttribute('y2') || 0
};
for (var i = colorStopEls.length; i--; ) {
el = colorStopEls[i];
offset = el.getAttribute('offset');
// convert percents to absolute values
offset = parseFloat(offset) / (/%$/.test(offset) ? 100 : 1);
colorStops[offset] = getColorStopFromStyle(el) || el.getAttribute('stop-color');
}
_convertPercentUnitsToValues(instance, coords);
return new fabric.Gradient({
x1: coords.x1,
y1: coords.y1,
x2: coords.x2,
y2: coords.y2,
colorStops: colorStops
});
},
/**
* @method forObject
* @static
*/
forObject: function(obj, options) {
options || (options = { });
_convertPercentUnitsToValues(obj, options);
return new fabric.Gradient(options);
}
});
function _convertPercentUnitsToValues(object, options) {
for (var prop in options) {
if (typeof options[prop] === 'string' && /^\d+%$/.test(options[prop])) {
var percents = parseFloat(options[prop], 10);
if (prop === 'x1' || prop === 'x2') {
options[prop] = object.width * percents / 100;
}
else if (prop === 'y1' || prop === 'y2') {
options[prop] = object.height * percents / 100;
}
}
// normalize rendering point (should be from top/left corner rather than center of the shape)
if (prop === 'x1' || prop === 'x2') {
options[prop] -= object.width / 2;
}
else if (prop === 'y1' || prop === 'y2') {
options[prop] -= object.height / 2;
}
}
}
/**
* Parses an SVG document, returning all of the gradient declarations found in it
* @static
* @function
* @memberOf fabric
* @method getGradientDefs
* @param {SVGDocument} doc SVG document to parse
* @return {Object} Gradient definitions; key corresponds to element id, value -- to gradient definition element
*/
function getGradientDefs(doc) {
var linearGradientEls = doc.getElementsByTagName('linearGradient'),
radialGradientEls = doc.getElementsByTagName('radialGradient'),
el, i,
gradientDefs = { };
i = linearGradientEls.length;
for (; i--; ) {
el = linearGradientEls[i];
gradientDefs[el.getAttribute('id')] = el;
}
i = radialGradientEls.length;
for (; i--; ) {
el = radialGradientEls[i];
gradientDefs[el.getAttribute('id')] = el;
}
return gradientDefs;
}
fabric.getGradientDefs = getGradientDefs;
})();
(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;
/**
* @name Point
* @memberOf fabric
* @constructor
* @param {Number} x
* @param {Number} y
* @return {fabric.Point} thisArg
*/
function Point(x, y) {
if (arguments.length > 0) {
this.init(x, y);
}
}
Point.prototype = /** @scope fabric.Point.prototype */ {
constructor: Point,
/**
* @method init
* @param {Number} x
* @param {Number} y
*/
init: function (x, y) {
this.x = x;
this.y = y;
},
/**
* @method add
* @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);
},
/**
* @method addEquals
* @param {fabric.Point} that
* @return {fabric.Point} thisArg
*/
addEquals: function (that) {
this.x += that.x;
this.y += that.y;
return this;
},
/**
* @method scalarAdd
* @param {Number} scalar
* @return {fabric.Point} new Point with added value
*/
scalarAdd: function (scalar) {
return new Point(this.x + scalar, this.y + scalar);
},
/**
* @method scalarAddEquals
* @param {Number} scalar
* @param {fabric.Point} thisArg
*/
scalarAddEquals: function (scalar) {
this.x += scalar;
this.y += scalar;
return this;
},
/**
* @method subtract
* @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);
},
/**
* @method subtractEquals
* @param {fabric.Point} that
* @return {fabric.Point} thisArg
*/
subtractEquals: function (that) {
this.x -= that.x;
this.y -= that.y;
return this;
},
scalarSubtract: function (scalar) {
return new Point(this.x - scalar, this.y - scalar);
},
scalarSubtractEquals: function (scalar) {
this.x -= scalar;
this.y -= scalar;
return this;
},
multiply: function (scalar) {
return new Point(this.x * scalar, this.y * scalar);
},
multiplyEquals: function (scalar) {
this.x *= scalar;
this.y *= scalar;
return this;
},
divide: function (scalar) {
return new Point(this.x / scalar, this.y / scalar);
},
divideEquals: function (scalar) {
this.x /= scalar;
this.y /= scalar;
return this;
},
eq: function (that) {
return (this.x === that.x && this.y === that.y);
},
lt: function (that) {
return (this.x < that.x && this.y < that.y);
},
lte: function (that) {
return (this.x <= that.x && this.y <= that.y);
},
gt: function (that) {
return (this.x > that.x && this.y > that.y);
},
gte: function (that) {
return (this.x >= that.x && this.y >= that.y);
},
lerp: function (that, t) {
return new Point(this.x + (that.x - this.x) * t, this.y + (that.y - this.y) * t);
},
distanceFrom: function (that) {
var dx = this.x - that.x,
dy = this.y - that.y;
return Math.sqrt(dx * dx + dy * dy);
},
min: function (that) {
return new Point(Math.min(this.x, that.x), Math.min(this.y, that.y));
},
max: function (that) {
return new Point(Math.max(this.x, that.x), Math.max(this.y, that.y));
},
toString: function () {
return this.x + "," + this.y;
},
setXY: function (x, y) {
this.x = x;
this.y = y;
},
setFromPoint: function (that) {
this.x = that.x;
this.y = that.y;
},
swap: function (that) {
var x = this.x,
y = this.y;
this.x = that.x;
this.y = that.y;
that.x = x;
that.y = 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;
}
/**
* @class Intersection
* @memberOf fabric
*/
function Intersection(status) {
if (arguments.length > 0) {
this.init(status);
}
}
fabric.Intersection = Intersection;
fabric.Intersection.prototype = /** @scope fabric.Intersection.prototype */ {
/**
* @method init
* @param {String} status
*/
init: function (status) {
this.status = status;
this.points = [];
},
/**
* @method appendPoint
* @param {String} status
*/
appendPoint: function (point) {
this.points.push(point);
},
/**
* @method appendPoints
* @param {String} status
*/
appendPoints: function (points) {
this.points = this.points.concat(points);
}
};
/**
* @static
* @method intersectLineLine
*/
fabric.Intersection.intersectLineLine = function (a1, a2, b1, b2) {
var result,
ua_t = (b2.x - b1.x) * (a1.y - b1.y) - (b2.y - b1.y) * (a1.x - b1.x),
ub_t = (a2.x - a1.x) * (a1.y - b1.y) - (a2.y - a1.y) * (a1.x - b1.x),
u_b = (b2.y - b1.y) * (a2.x - a1.x) - (b2.x - b1.x) * (a2.y - a1.y);
if (u_b !== 0) {
var ua = ua_t / u_b,
ub = ub_t / u_b;
if (0 <= ua && ua <= 1 && 0 <= ub && ub <= 1) {
result = new Intersection("Intersection");
result.points.push(new fabric.Point(a1.x + ua * (a2.x - a1.x), a1.y + ua * (a2.y - a1.y)));
}
else {
result = new Intersection("No Intersection");
}
}
else {
if (ua_t === 0 || ub_t === 0) {
result = new Intersection("Coincident");
}
else {
result = new Intersection("Parallel");
}
}
return result;
};
/**
* @method intersectLinePolygon
*/
fabric.Intersection.intersectLinePolygon = function(a1,a2,points){
var result = new Intersection("No Intersection"),
length = points.length;
for (var i = 0; i < length; i++) {
var 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;
};
/**
* @method intersectPolygonPolygon
*/
fabric.Intersection.intersectPolygonPolygon = function (points1, points2) {
var result = new Intersection("No Intersection"),
length = points1.length;
for (var 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;
};
/**
* @method intersectPolygonRectangle
*/
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("No 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;
}
/**
* 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 Color
* @memberOf fabric
* @param {String} color (optional) in hex or rgb(a) format
*/
function Color(color) {
if (!color) {
this.setSource([0, 0, 0, 1]);
}
else {
this._tryParsingColor(color);
}
}
fabric.Color = Color;
fabric.Color.prototype = /** @scope fabric.Color.prototype */ {
/**
* @private
* @method _tryParsingColor
*/
_tryParsingColor: function(color) {
var source = Color.sourceFromHex(color);
if (!source) {
source = Color.sourceFromRgb(color);
}
if (source) {
this.setSource(source);
}
},
/**
* Returns source of this color (where source is an array representation; ex: [200, 200, 100, 1])
* @method getSource
* @return {Array}
*/
getSource: function() {
return this._source;
},
/**
* Sets source of this color (where source is an array representation; ex: [200, 200, 100, 1])
* @method setSource
* @param {Array} source
*/
setSource: function(source) {
this._source = source;
},
/**
* Returns color represenation in RGB format
* @method toRgb
* @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 represenation in RGBA format
* @method toRgba
* @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 represenation in HEX format
* @method toHex
* @return {String} ex: FF5555
*/
toHex: function() {
var source = this.getSource();
var r = source[0].toString(16);
r = (r.length === 1) ? ('0' + r) : r;
var g = source[1].toString(16);
g = (g.length === 1) ? ('0' + g) : g;
var b = source[2].toString(16);
b = (b.length === 1) ? ('0' + b) : b;
return r.toUpperCase() + g.toUpperCase() + b.toUpperCase();
},
/**
* Gets value of alpha channel for this color
* @method getAlpha
* @return {Number} 0-1
*/
getAlpha: function() {
return this.getSource()[3];
},
/**
* Sets value of alpha channel for this color
* @method setAlpha
* @param {Number} 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
* @method toGrayscale
* @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
* @method toGrayscale
* @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
* @method overlayWith
* @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();
for (var 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), rgb(255, 100, 10, 0.5), rgb(1,1,1))
* @static
* @field
*/
fabric.Color.reRGBa = /^rgba?\((\d{1,3})\s*,\s*(\d{1,3})\s*,\s*(\d{1,3})(?:\s*,\s*(\d+(?:\.\d+)?))?\)$/;
/**
* Regex matching color in HEX format (ex: #FF5555, 010155, aff)
* @static
* @field
*/
fabric.Color.reHex = /^#?([0-9a-f]{6}|[0-9a-f]{3})$/i;
/**
* Returns new color object, when given a color in RGB format
* @method fromRgb
* @param {String} color ex: rgb(0-255,0-255,0-255)
* @return {fabric.Color}
*/
fabric.Color.fromRgb = function(color) {
return Color.fromSource(Color.sourceFromRgb(color));
};
/**
* Returns array represenatation (ex: [100, 100, 200, 1]) of a color that's in RGB or RGBA format
* @method sourceFromRgb
* @param {String} color ex: rgb(0-255,0-255,0-255)
* @return {Array} source
*/
fabric.Color.sourceFromRgb = function(color) {
var match = color.match(Color.reRGBa);
if (match) {
return [
parseInt(match[1], 10),
parseInt(match[2], 10),
parseInt(match[3], 10),
match[4] ? parseFloat(match[4]) : 1
];
}
};
/**
* Returns new color object, when given a color in RGBA format
* @static
* @function
* @method fromRgba
* @param {String} color
* @return {fabric.Color}
*/
fabric.Color.fromRgba = Color.fromRgb;
/**
* Returns new color object, when given a color in HEX format
* @static
* @method fromHex
* @return {fabric.Color}
*/
fabric.Color.fromHex = function(color) {
return Color.fromSource(Color.sourceFromHex(color));
};
/**
* Returns array represenatation (ex: [100, 100, 200, 1]) of a color that's in HEX format
* @static
* @method sourceFromHex
* @param {String} color ex: FF5555
* @return {Array} source
*/
fabric.Color.sourceFromHex = function(color) {
if (color.match(Color.reHex)) {
var value = color.slice(color.indexOf('#') + 1),
isShortNotation = (value.length === 3),
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);
return [
parseInt(r, 16),
parseInt(g, 16),
parseInt(b, 16),
1
];
}
};
/**
* Returns new color object, when given color in array representation (ex: [200, 100, 100, 0.5])
* @static
* @method fromSource
* @return {fabric.Color}
*/
fabric.Color.fromSource = function(source) {
var oColor = new Color();
oColor.setSource(source);
return oColor;
};
})(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,
removeListener = fabric.util.removeListener,
CANVAS_INIT_ERROR = new Error('Could not initialize `canvas` element');
/**
* @class fabric.StaticCanvas
* @constructor
* @param {HTMLElement | String} el <canvas> element to initialize instance on
* @param {Object} [options] Options object
*/
fabric.StaticCanvas = function (el, options) {
options || (options = { });
this._initStatic(el, options);
fabric.StaticCanvas.activeInstance = this;
};
extend(fabric.StaticCanvas.prototype, fabric.Observable);
extend(fabric.StaticCanvas.prototype, /** @scope fabric.StaticCanvas.prototype */ {
/**
* Background color of canvas instance
* @property
* @type String
*/
backgroundColor: 'rgba(0, 0, 0, 0)',
/**
* Background image of canvas instance
* Should be set via `setBackgroundImage`
* @property
* @type String
*/
backgroundImage: '',
/**
* Opacity of the background image of the canvas instance
* @property
* @type Float
*/
backgroundImageOpacity: 1.0,
/**
* Indicatus whether the background image should be stretched to fit the
* dimensions of the canvas instance.
* @property
* @type Boolean
*/
backgroundImageStretch: true,
/**
* Overlay image of canvas instance
* Should be set via `setOverlayImage`
* @property
* @type String
*/
overlayImage: '',
/**
* Left offset of overlay image (if present)
* @property
* @type Number
*/
overlayImageLeft: 0,
/**
* Top offset of overlay image (if present)
* @property
* @type Number
*/
overlayImageTop: 0,
/**
* Indicates whether toObject/toDatalessObject should include default values
* @property
* @type Boolean
*/
includeDefaultValues: true,
/**
* Indicates whether objects' state should be saved
* @property
* @type Boolean
*/
stateful: true,
/**
* Indicates whether fabric.Canvas#add should also re-render canvas.
* Disabling this option could give a great performance boost when adding a lot of objects to canvas at once
* (followed by a manual rendering after addition)
*/
renderOnAddition: true,
/**
* Function that determines clipping of entire canvas area
* Being passed context as first argument. See clipping canvas area in https://github.com/kangax/fabric.js/wiki/FAQ
* @property
* @type Function
*/
clipTo: null,
/**
* Indicates whether object controls (borders/corners) are rendered above overlay image
* @property
* @type Boolean
*/
controlsAboveOverlay: false,
/**
* Callback; invoked right before object is about to be scaled/rotated
* @method onBeforeScaleRotate
* @param {fabric.Object} target Object that's about to be scaled/rotated
*/
onBeforeScaleRotate: function () {
/* NOOP */
},
_initStatic: function(el, options) {
this._objects = [];
this._createLowerCanvas(el);
this._initOptions(options);
if (options.overlayImage) {
this.setOverlayImage(options.overlayImage, this.renderAll.bind(this));
}
if (options.backgroundImage) {
this.setBackgroundImage(options.backgroundImage, this.renderAll.bind(this));
}
this.calcOffset();
},
/**
* Calculates canvas element offset relative to the document
* This method is also attached as "resize" event handler of window
* @method calcOffset
* @return {fabric.Canvas} instance
* @chainable
*/
calcOffset: function () {
this._offset = getElementOffset(this.lowerCanvasEl);
return this;
},
/**
* Sets overlay image for this canvas
* @method setOverlayImage
* @param {String} url 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 overlay image
* @return {fabric.Canvas} thisArg
* @chainable
*/
setOverlayImage: function (url, callback, options) { // TODO (kangax): test callback
fabric.util.loadImage(url, function(img) {
this.overlayImage = img;
if (options && ('overlayImageLeft' in options)) {
this.overlayImageLeft = options.overlayImageLeft;
}
if (options && ('overlayImageTop' in options)) {
this.overlayImageTop = options.overlayImageTop;
}
callback && callback();
}, this);
return this;
},
/**
* Sets background image for this canvas
* @method setBackgroundImage
* @param {String} url 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 background image
* @return {fabric.Canvas} thisArg
* @chainable
*/
setBackgroundImage: function (url, callback, options) {
fabric.util.loadImage(url, function(img) {
this.backgroundImage = img;
if (options && ('backgroundImageOpacity' in options)) {
this.backgroundImageOpacity = options.backgroundImageOpacity;
}
if (options && ('backgroundImageStretch' in options)) {
this.backgroundImageStretch = options.backgroundImageStretch;
}
callback && callback();
}, this);
return this;
},
/**
* @private
* @method _createCanvasElement
* @param {Element} element
*/
_createCanvasElement: function() {
var element = fabric.document.createElement('canvas');
if (!element.style) {
element.style = { };
}
if (!element) {
throw CANVAS_INIT_ERROR;
}
this._initCanvasElement(element);
return element;
},
_initCanvasElement: function(element) {
if (typeof element.getContext === 'undefined' &&
typeof G_vmlCanvasManager !== 'undefined' &&
G_vmlCanvasManager.initElement) {
G_vmlCanvasManager.initElement(element);
}
if (typeof element.getContext === 'undefined') {
throw CANVAS_INIT_ERROR;
}
},
/**
* @method _initOptions
* @param {Object} options
*/
_initOptions: function (options) {
for (var prop in options) {
this[prop] = options[prop];
}
this.width = parseInt(this.lowerCanvasEl.width, 10) || 0;
this.height = parseInt(this.lowerCanvasEl.height, 10) || 0;
if (!this.lowerCanvasEl.style) return;
this.lowerCanvasEl.style.width = this.width + 'px';
this.lowerCanvasEl.style.height = this.height + 'px';
},
/**
* Creates a secondary canvas
* @method _createLowerCanvas
*/
_createLowerCanvas: function (canvasEl) {
this.lowerCanvasEl = fabric.util.getById(canvasEl) || this._createCanvasElement();
this._initCanvasElement(this.lowerCanvasEl);
fabric.util.addClass(this.lowerCanvasEl, 'lower-canvas');
if (this.interactive) {
this._applyCanvasStyle(this.lowerCanvasEl);
}
this.contextContainer = this.lowerCanvasEl.getContext('2d');
},
/**
* Returns canvas width
* @method getWidth
* @return {Number}
*/
getWidth: function () {
return this.width;
},
/**
* Returns canvas height
* @method getHeight
* @return {Number}
*/
getHeight: function () {
return this.height;
},
/**
* Sets width of this canvas instance
* @method setWidth
* @param {Number} width value to set width to
* @return {fabric.Canvas} instance
* @chainable true
*/
setWidth: function (value) {
return this._setDimension('width', value);
},
/**
* Sets height of this canvas instance
* @method setHeight
* @param {Number} height value to set height to
* @return {fabric.Canvas} instance
* @chainable true
*/
setHeight: function (value) {
return this._setDimension('height', value);
},
/**
* Sets dimensions (width, height) of this canvas instance
* @method setDimensions
* @param {Object} dimensions
* @return {fabric.Canvas} thisArg
* @chainable
*/
setDimensions: function(dimensions) {
for (var prop in dimensions) {
this._setDimension(prop, dimensions[prop]);
}
return this;
},
/**
* Helper for setting width/height
* @private
* @method _setDimensions
* @param {String} prop property (width|height)
* @param {Number} value value to set property to
* @return {fabric.Canvas} instance
* @chainable true
*/
_setDimension: function (prop, value) {
this.lowerCanvasEl[prop] = value;
this.lowerCanvasEl.style[prop] = value + 'px';
if (this.upperCanvasEl) {
this.upperCanvasEl[prop] = value;
this.upperCanvasEl.style[prop] = value + 'px';
}
if (this.cacheCanvasEl) {
this.cacheCanvasEl[prop] = value;
}
if (this.wrapperEl) {
this.wrapperEl.style[prop] = value + 'px';
}
this[prop] = value;
this.calcOffset();
this.renderAll();
return this;
},
/**
* Returns <canvas> element corresponding to this instance
* @method getElement
* @return {HTMLCanvasElement}
*/
getElement: function () {
return this.lowerCanvasEl;
},
// placeholder
getActiveObject: function() {
return null;
},
// placeholder
getActiveGroup: function() {
return null;
},
/**
* Given a context, renders an object on that context
* @param ctx {Object} context to render object on
* @param object {Object} object to render
* @private
*/
_draw: function (ctx, object) {
if (!object) return;
if (this.controlsAboveOverlay) {
var hasBorders = object.hasBorders, hasCorners = object.hasCorners;
object.hasBorders = object.hasCorners = false;
object.render(ctx);
object.hasBorders = hasBorders;
object.hasCorners = hasCorners;
}
else {
object.render(ctx);
}
},
/**
* Adds objects to canvas, then renders canvas;
* Objects should be instances of (or inherit from) fabric.Object
* @method add
* @return {fabric.Canvas} thisArg
* @chainable
*/
add: function () {
this._objects.push.apply(this._objects, arguments);
for (var i = arguments.length; i--; ) {
this._initObject(arguments[i]);
}
this.renderOnAddition && this.renderAll();
return this;
},
/**
* @private
* @method _initObject
*/
_initObject: function(obj) {
this.stateful && obj.setupState();
obj.setCoords();
obj.canvas = this;
this.fire('object:added', { target: obj });
obj.fire('added');
},
/**
* Inserts an object to canvas at specified index and renders canvas.
* An object should be an instance of (or inherit from) fabric.Object
* @method insertAt
* @param object {Object} Object to insert
* @param index {Number} index to insert object at
* @param nonSplicing {Boolean} when `true`, no splicing (shifting) of objects occurs
* @return {fabric.Canvas} instance
*/
insertAt: function (object, index, nonSplicing) {
if (nonSplicing) {
this._objects[index] = object;
}
else {
this._objects.splice(index, 0, object);
}
this._initObject(object);
this.renderOnAddition && this.renderAll();
return this;
},
/**
* Returns an array of objects this instance has
* @method getObjects
* @return {Array}
*/
getObjects: function () {
return this._objects;
},
/**
* Clears specified context of canvas element
* @method clearContext
* @param context {Object} 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
* @method getContext
* @return {CanvasRenderingContext2D}
*/
getContext: function () {
return this.contextContainer;
},
/**
* Clears all contexts (background, main, top) of an instance
* @method clear
* @return {fabric.Canvas} thisArg
* @chainable
*/
clear: function () {
this._objects.length = 0;
this.clearContext(this.contextContainer);
if (this.contextTop) {
this.clearContext(this.contextTop);
}
this.renderAll();
return this;
},
/**
* Renders both the top canvas and the secondary container canvas.
* @method renderAll
* @param allOnTop {Boolean} optional Whether we want to force all images to be rendered on the top canvas
* @return {fabric.Canvas} instance
* @chainable
*/
renderAll: function (allOnTop) {
var canvasToDrawOn = this[(allOnTop === true && this.interactive) ? 'contextTop' : 'contextContainer'];
if (this.contextTop) {
this.clearContext(this.contextTop);
}
if (!allOnTop) {
this.clearContext(canvasToDrawOn);
}
var activeGroup = this.getActiveGroup();
if (this.clipTo) {
this._clipCanvas(canvasToDrawOn);
}
canvasToDrawOn.fillStyle = this.backgroundColor;
canvasToDrawOn.fillRect(0, 0, this.width, this.height);
if (typeof this.backgroundImage === 'object') {
this._drawBackroundImage(canvasToDrawOn);
}
this.fire('before:render');
for (var i = 0, length = this._objects.length; i < length; ++i) {
if (!activeGroup ||
(activeGroup && this._objects[i] && !activeGroup.contains(this._objects[i]))) {
this._draw(canvasToDrawOn, this._objects[i]);
}
}
// delegate rendering to group selection (if one exists)
if (activeGroup) {
//Store objects in group preserving order, then replace
var sortedObjects = [];
this.forEachObject(function (object) {
if (activeGroup.contains(object)) {
sortedObjects.push(object);
}
});
activeGroup._set('objects', sortedObjects);
this._draw(canvasToDrawOn, activeGroup);
}
if (this.clipTo) {
canvasToDrawOn.restore();
}
if (this.overlayImage) {
canvasToDrawOn.drawImage(this.overlayImage, this.overlayImageLeft, this.overlayImageTop);
}
if (this.controlsAboveOverlay) {
this.drawControls(canvasToDrawOn);
}
this.fire('after:render');
return this;
},
_clipCanvas: function(canvasToDrawOn) {
canvasToDrawOn.save();
canvasToDrawOn.beginPath();
this.clipTo(canvasToDrawOn);
canvasToDrawOn.clip();
},
_drawBackroundImage: function(canvasToDrawOn) {
canvasToDrawOn.save();
canvasToDrawOn.globalAlpha = this.backgroundImageOpacity;
if (this.backgroundImageStretch) {
canvasToDrawOn.drawImage(this.backgroundImage, 0, 0, this.width, this.height);
}
else {
canvasToDrawOn.drawImage(this.backgroundImage, 0, 0);
}
canvasToDrawOn.restore();
},
/**
* Method to render only the top canvas.
* Also used to render the group selection box.
* @method renderTop
* @return {fabric.Canvas} thisArg
* @chainable
*/
renderTop: function () {
var ctx = this.contextTop || this.contextContainer;
this.clearContext(ctx);
// we render the top context - last object
if (this.selection && this._groupSelector) {
this._drawSelection();
}
// delegate rendering to group selection if one exists
// used for drawing selection borders/corners
var activeGroup = this.getActiveGroup();
if (activeGroup) {
activeGroup.render(ctx);
}
if (this.overlayImage) {
ctx.drawImage(this.overlayImage, this.overlayImageLeft, this.overlayImageTop);
}
this.fire('after:render');
return this;
},
/**
* Draws objects' controls (borders/corners)
* @method drawControls
* @param {Object} ctx context to render controls on
*/
drawControls: function(ctx) {
var activeGroup = this.getActiveGroup();
if (activeGroup) {
ctx.save();
fabric.Group.prototype.transform.call(activeGroup, ctx);
activeGroup.drawBorders(ctx).drawCorners(ctx);
ctx.restore();
}
else {
for (var i = 0, len = this._objects.length; i < len; ++i) {
if (!this._objects[i] || !this._objects[i].active) continue;
ctx.save();
fabric.Object.prototype.transform.call(this._objects[i], ctx);
this._objects[i].drawBorders(ctx).drawCorners(ctx);
ctx.restore();
this.lastRenderedObjectWithControlsAboveOverlay = this._objects[i];
}
}
},
/**
* Exports canvas element to a dataurl image.
* @method toDataURL
* @param {String} format the format of the output image. Either "jpeg" or "png".
* @param {Number} quality quality level (0..1)
* @return {String}
*/
toDataURL: function (format, quality) {
var canvasEl = this.upperCanvasEl || this.lowerCanvasEl;
this.renderAll(true);
var data = (fabric.StaticCanvas.supports('toDataURLWithQuality'))
? canvasEl.toDataURL('image/' + format, quality)
: canvasEl.toDataURL('image/' + format);
this.renderAll();
return data;
},
/**
* Exports canvas element to a dataurl image (allowing to change image size via multiplier).
* @method toDataURLWithMultiplier
* @param {String} format (png|jpeg)
* @param {Number} multiplier
* @param {Number} quality (0..1)
* @return {String}
*/
toDataURLWithMultiplier: function (format, multiplier, quality) {
var origWidth = this.getWidth(),
origHeight = this.getHeight(),
scaledWidth = origWidth * multiplier,
scaledHeight = origHeight * multiplier,
activeObject = this.getActiveObject(),
activeGroup = this.getActiveGroup();
this.setWidth(scaledWidth).setHeight(scaledHeight);
this.contextTop.scale(multiplier, multiplier);
if (activeGroup) {
// not removing group due to complications with restoring it with correct state afterwords
this._tempRemoveBordersCornersFromGroup(activeGroup);
}
else if (activeObject) {
this.deactivateAll();
}
// restoring width, height for `renderAll` to draw
// background properly (while context is scaled)
this.width = origWidth;
this.height = origHeight;
this.renderAll(true);
var dataURL = this.toDataURL(format, quality);
this.contextTop.scale(1 / multiplier, 1 / multiplier);
this.setWidth(origWidth).setHeight(origHeight);
if (activeGroup) {
this._restoreBordersCornersOnGroup(activeGroup);
}
else if (activeObject) {
this.setActiveObject(activeObject);
}
this.renderAll();
return dataURL;
},
_tempRemoveBordersCornersFromGroup: function(group) {
group.origHideCorners = group.hideCorners;
group.origBorderColor = group.borderColor;
group.hideCorners = true;
group.borderColor = 'rgba(0,0,0,0)';
group.forEachObject(function(o) {
o.origBorderColor = o.borderColor;
o.borderColor = 'rgba(0,0,0,0)';
});
},
_restoreBordersCornersOnGroup: function(group) {
group.hideCorners = group.origHideCorners;
group.borderColor = group.origBorderColor;
group.forEachObject(function(o) {
o.borderColor = o.origBorderColor;
delete o.origBorderColor;
});
},
/**
* Returns coordinates of a center of canvas.
* Returned value is an object with top and left properties
* @method getCenter
* @return {Object} object with "top" and "left" number values
*/
getCenter: function () {
return {
top: this.getHeight() / 2,
left: this.getWidth() / 2
};
},
/**
* Centers object horizontally.
* @method centerObjectH
* @param {fabric.Object} object Object to center
* @return {fabric.Canvas} thisArg
*/
centerObjectH: function (object) {
object.set('left', this.getCenter().left);
this.renderAll();
return this;
},
/**
* Centers object vertically.
* @method centerObjectH
* @param {fabric.Object} object Object to center
* @return {fabric.Canvas} thisArg
* @chainable
*/
centerObjectV: function (object) {
object.set('top', this.getCenter().top);
this.renderAll();
return this;
},
/**
* Centers object vertically and horizontally.
* @method centerObject
* @param {fabric.Object} object Object to center
* @return {fabric.Canvas} thisArg
* @chainable
*/
centerObject: function (object) {
return this.centerObjectH(object).centerObjectV(object);
},
/**
* Returs dataless JSON representation of canvas
* @method toDatalessJSON
* @return {String} json string
*/
toDatalessJSON: function () {
return this.toDatalessObject();
},
/**
* Returns object representation of canvas
* @method toObject
* @return {Object}
*/
toObject: function () {
return this._toObjectMethod('toObject');
},
/**
* Returns dataless object representation of canvas
* @method toDatalessObject
* @return {Object}
*/
toDatalessObject: function () {
return this._toObjectMethod('toDatalessObject');
},
/**
* @private
* @method _toObjectMethod
*/
_toObjectMethod: function (methodName) {
var data = {
objects: this._objects.map(function (instance) {
// TODO (kangax): figure out how to clean this up
var originalValue;
if (!this.includeDefaultValues) {
originalValue = instance.includeDefaultValues;
instance.includeDefaultValues = false;
}
var object = instance[methodName]();
if (!this.includeDefaultValues) {
instance.includeDefaultValues = originalValue;
}
return object;
}, this),
background: this.backgroundColor
};
if (this.backgroundImage) {
data.backgroundImage = this.backgroundImage.src;
data.backgroundImageOpacity = this.backgroundImageOpacity;
data.backgroundImageStretch = this.backgroundImageStretch;
}
if (this.overlayImage) {
data.overlayImage = this.overlayImage.src;
data.overlayImageLeft = this.overlayImageLeft;
data.overlayImageTop = this.overlayImageTop;
}
return data;
},
/**
* Returns SVG representation of canvas
* @function
* @method toSVG
* @return {String}
*/
toSVG: function() {
var markup = [
'',
'',
'');
return markup.join('');
},
/**
* Returns true if canvas contains no objects
* @method isEmpty
* @return {Boolean} true if canvas is empty
*/
isEmpty: function () {
return this._objects.length === 0;
},
/**
* Removes an object from canvas and returns it
* @method remove
* @param object {Object} Object to remove
* @return {Object} removed object
*/
remove: function (object) {
removeFromArray(this._objects, object);
if (this.getActiveObject() === object) {
// removing active object should fire "selection:cleared" events
this.fire('before:selection:cleared', { target: object });
this.discardActiveObject();
this.fire('selection:cleared');
}
this.renderAll();
return object;
},
/**
* Moves an object to the bottom of the stack of drawn objects
* @method sendToBack
* @param object {fabric.Object} Object to send to back
* @return {fabric.Canvas} thisArg
* @chainable
*/
sendToBack: function (object) {
removeFromArray(this._objects, object);
this._objects.unshift(object);
return this.renderAll();
},
/**
* Moves an object to the top of the stack of drawn objects
* @method bringToFront
* @param object {fabric.Object} Object to send
* @return {fabric.Canvas} thisArg
* @chainable
*/
bringToFront: function (object) {
removeFromArray(this._objects, object);
this._objects.push(object);
return this.renderAll();
},
/**
* Moves an object one level down in stack of drawn objects
* @method sendBackwards
* @param object {fabric.Object} Object to send
* @return {fabric.Canvas} thisArg
* @chainable
*/
sendBackwards: function (object) {
var idx = this._objects.indexOf(object),
nextIntersectingIdx = idx;
// if object is not on the bottom of stack
if (idx !== 0) {
// traverse down the stack looking for the nearest intersecting object
for (var 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) {
nextIntersectingIdx = i;
break;
}
}
removeFromArray(this._objects, object);
this._objects.splice(nextIntersectingIdx, 0, object);
}
return this.renderAll();
},
/**
* Moves an object one level up in stack of drawn objects
* @method bringForward
* @param object {fabric.Object} Object to send
* @return {fabric.Canvas} thisArg
* @chainable
*/
bringForward: function (object) {
var objects = this.getObjects(),
idx = objects.indexOf(object),
nextIntersectingIdx = idx;
// if object is not on top of stack (last item in an array)
if (idx !== objects.length-1) {
// traverse up the stack looking for the nearest intersecting object
for (var i = idx + 1, l = this._objects.length; i < l; ++i) {
var isIntersecting = object.intersectsWithObject(objects[i]) ||
object.isContainedWithinObject(this._objects[i]) ||
this._objects[i].isContainedWithinObject(object);
if (isIntersecting) {
nextIntersectingIdx = i;
break;
}
}
removeFromArray(objects, object);
objects.splice(nextIntersectingIdx, 0, object);
}
this.renderAll();
},
/**
* Returns object at specified index
* @method item
* @param {Number} index
* @return {fabric.Object}
*/
item: function (index) {
return this.getObjects()[index];
},
/**
* Returns number representation of an instance complexity
* @method complexity
* @return {Number} complexity
*/
complexity: function () {
return this.getObjects().reduce(function (memo, current) {
memo += current.complexity ? current.complexity() : 0;
return memo;
}, 0);
},
/**
* Iterates over all objects, invoking callback for each one of them
* @method forEachObject
* @return {fabric.Canvas} thisArg
*/
forEachObject: function(callback, context) {
var objects = this.getObjects(),
i = objects.length;
while (i--) {
callback.call(context, objects[i], i, objects);
}
return this;
},
/**
* Clears a canvas element and removes all event handlers.
* @method dispose
* @return {fabric.Canvas} thisArg
* @chainable
*/
dispose: function () {
this.clear();
if (this.interactive) {
removeListener(this.upperCanvasEl, 'mousedown', this._onMouseDown);
removeListener(this.upperCanvasEl, 'mousemove', this._onMouseMove);
removeListener(fabric.window, 'resize', this._onResize);
}
return this;
},
/**
* @private
* @method _resizeImageToFit
* @param {HTMLImageElement} imgEl
*/
_resizeImageToFit: function (imgEl) {
var imageWidth = imgEl.width || imgEl.offsetWidth,
widthScaleFactor = this.getWidth() / imageWidth;
// scale image down so that it has original dimensions when printed in large resolution
if (imageWidth) {
imgEl.width = imageWidth * widthScaleFactor;
}
}
});
/**
* Returns a string representation of an instance
* @method toString
* @return {String} string representation of an instance
*/
fabric.StaticCanvas.prototype.toString = function () { // Assign explicitly since `extend` doesn't take care of DontEnum bug yet
return '#';
};
extend(fabric.StaticCanvas, /** @scope fabric.StaticCanvas */ {
/**
* @static
* @property EMPTY_JSON
* @type String
*/
EMPTY_JSON: '{"objects": [], "background": "white"}',
/**
* Takes <canvas> element and transforms its data in such way that it becomes grayscale
* @static
* @method toGrayscale
* @param {HTMLCanvasElement} canvasEl
*/
toGrayscale: function (canvasEl) {
var context = canvasEl.getContext('2d'),
imageData = context.getImageData(0, 0, canvasEl.width, canvasEl.height),
data = imageData.data,
iLen = imageData.width,
jLen = imageData.height,
index, average, i, j;
for (i = 0; i < iLen; i++) {
for (j = 0; j < jLen; j++) {
index = (i * 4) * jLen + (j * 4);
average = (data[index] + data[index + 1] + data[index + 2]) / 3;
data[index] = average;
data[index + 1] = average;
data[index + 2] = average;
}
}
context.putImageData(imageData, 0, 0);
},
/**
* Provides a way to check support of some of the canvas methods
* (either those of HTMLCanvasElement itself, or rendering context)
*
* @method supports
* @param methodName {String} Method to check support for;
* Could be one of "getImageData", "toDataURL" or "toDataURLWithQuality"
* @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 = fabric.document.createElement('canvas');
if (typeof G_vmlCanvasManager !== 'undefined') {
G_vmlCanvasManager.initElement(el);
}
if (!el || !el.getContext) {
return null;
}
var ctx = el.getContext('2d');
if (!ctx) {
return null;
}
switch (methodName) {
case 'getImageData':
return typeof ctx.getImageData !== 'undefined';
case 'toDataURL':
return typeof el.toDataURL !== 'undefined';
case 'toDataURLWithQuality':
try {
el.toDataURL('image/jpeg', 0);
return true;
}
catch (e) { }
return false;
default:
return null;
}
}
});
/**
* Returs JSON representation of canvas
* @function
* @method toJSON
* @return {String} json string
*/
fabric.StaticCanvas.prototype.toJSON = fabric.StaticCanvas.prototype.toObject;
})();
(function() {
var extend = fabric.util.object.extend,
getPointer = fabric.util.getPointer,
addListener = fabric.util.addListener,
removeListener = fabric.util.removeListener,
cursorMap = {
'tr': 'ne-resize',
'br': 'se-resize',
'bl': 'sw-resize',
'tl': 'nw-resize',
'ml': 'w-resize',
'mt': 'n-resize',
'mr': 'e-resize',
'mb': 's-resize'
},
utilMin = fabric.util.array.min,
utilMax = fabric.util.array.max,
sqrt = Math.sqrt,
pow = Math.pow,
atan2 = Math.atan2,
abs = Math.abs,
min = Math.min,
max = Math.max,
STROKE_OFFSET = 0.5;
/**
* @class fabric.Canvas
* @constructor
* @extends fabric.StaticCanvas
* @param {HTMLElement | String} el <canvas> element to initialize instance on
* @param {Object} [options] Options object
*/
fabric.Canvas = function(el, options) {
options || (options = { });
this._initStatic(el, options);
this._initInteractive();
this._createCacheCanvas();
fabric.Canvas.activeInstance = this;
};
function ProtoProxy(){ }
ProtoProxy.prototype = fabric.StaticCanvas.prototype;
fabric.Canvas.prototype = new ProtoProxy();
var InteractiveMethods = /** @scope fabric.Canvas.prototype */ {
/**
* Indicates that canvas is interactive. This property should not be changed.
* @property
* @type Boolean
*/
interactive: true,
/**
* Indicates whether group selection should be enabled
* @property
* @type Boolean
*/
selection: true,
/**
* Color of selection
* @property
* @type String
*/
selectionColor: 'rgba(100, 100, 255, 0.3)', // blue
/**
* Color of the border of selection (usually slightly darker than color of selection itself)
* @property
* @type String
*/
selectionBorderColor: 'rgba(255, 255, 255, 0.3)',
/**
* Width of a line used in object/group selection
* @property
* @type Number
*/
selectionLineWidth: 1,
/**
* Color of the line used in free drawing mode
* @property
* @type String
*/
freeDrawingColor: 'rgb(0, 0, 0)',
/**
* Width of a line used in free drawing mode
* @property
* @type Number
*/
freeDrawingLineWidth: 1,
/**
* Default cursor value used when hovering over an object on canvas
* @property
* @type String
*/
hoverCursor: 'move',
/**
* Default cursor value used when moving an object on canvas
* @property
* @type String
*/
moveCursor: 'move',
/**
* Default cursor value used for the entire canvas
* @property
* @type String
*/
defaultCursor: 'default',
/**
* Cursor value used for rotation point
* @property
* @type String
*/
rotationCursor: 'crosshair',
/**
* Default element class that's given to wrapper (div) element of canvas
* @property
* @type String
*/
containerClass: 'canvas-container',
/**
* When true, object detection happens on per-pixel basis rather than on per-bounding-box
* @property
* @type Boolean
*/
perPixelTargetFind: false,
/**
* Number of pixels around target pixel to tolerate (consider active) during object detection
* @property
* @type Number
*/
targetFindTolerance: 0,
/**
* @method _initInteractive
* @private
*/
_initInteractive: function() {
this._currentTransform = null;
this._groupSelector = null;
this._freeDrawingXPoints = [ ];
this._freeDrawingYPoints = [ ];
this._initWrapperElement();
this._createUpperCanvas();
this._initEvents();
this.calcOffset();
},
/**
* Adds mouse listeners to canvas
* @method _initEvents
* @private
* See configuration documentation for more details.
*/
_initEvents: function () {
var _this = this;
this._onMouseDown = function (e) {
_this.__onMouseDown(e);
addListener(fabric.document, 'mouseup', _this._onMouseUp);
fabric.isTouchSupported && addListener(fabric.document, 'touchend', _this._onMouseUp);
addListener(fabric.document, 'mousemove', _this._onMouseMove);
fabric.isTouchSupported && addListener(fabric.document, 'touchmove', _this._onMouseMove);
removeListener(_this.upperCanvasEl, 'mousemove', _this._onMouseMove);
fabric.isTouchSupported && removeListener(_this.upperCanvasEl, 'touchmove', _this._onMouseMove);
};
this._onMouseUp = function (e) {
_this.__onMouseUp(e);
removeListener(fabric.document, 'mouseup', _this._onMouseUp);
fabric.isTouchSupported && removeListener(fabric.document, 'touchend', _this._onMouseUp);
removeListener(fabric.document, 'mousemove', _this._onMouseMove);
fabric.isTouchSupported && removeListener(fabric.document, 'touchmove', _this._onMouseMove);
addListener(_this.upperCanvasEl, 'mousemove', _this._onMouseMove);
fabric.isTouchSupported && addListener(_this.upperCanvasEl, 'touchmove', _this._onMouseMove);
};
this._onMouseMove = function (e) {
e.preventDefault && e.preventDefault();
_this.__onMouseMove(e);
};
this._onResize = function () {
_this.calcOffset();
};
addListener(fabric.window, 'resize', this._onResize);
if (fabric.isTouchSupported) {
addListener(this.upperCanvasEl, 'touchstart', this._onMouseDown);
addListener(this.upperCanvasEl, 'touchmove', this._onMouseMove);
}
else {
addListener(this.upperCanvasEl, 'mousedown', this._onMouseDown);
addListener(this.upperCanvasEl, 'mousemove', this._onMouseMove);
}
},
/**
* 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.
* @method __onMouseUp
* @param {Event} e Event object fired on mouseup
*
*/
__onMouseUp: function (e) {
var target;
if (this.isDrawingMode && this._isCurrentlyDrawing) {
this._finalizeDrawingPath();
this.fire('mouse:up', { e: e });
return;
}
if (this._currentTransform) {
var transform = this._currentTransform;
target = transform.target;
if (target._scaling) {
target._scaling = false;
}
// determine the new coords everytime the image changes its position
var i = this._objects.length;
while (i--) {
this._objects[i].setCoords();
}
// only fire :modified event if target coordinates were changed during mousedown-mouseup
if (this.stateful && target.hasStateChanged()) {
target.isMoving = false;
this.fire('object:modified', { target: target });
target.fire('modified');
}
}
this._currentTransform = null;
if (this._groupSelector) {
// group selection was completed, determine its bounds
this._findSelectedObjects(e);
}
var activeGroup = this.getActiveGroup();
if (activeGroup) {
activeGroup.setObjectsCoords();
activeGroup.set('isMoving', false);
this._setCursor(this.defaultCursor);
}
// clear selection
this._groupSelector = null;
this.renderAll();
this._setCursorFromEvent(e, target);
// fix for FF
this._setCursor('');
var _this = this;
setTimeout(function () {
_this._setCursorFromEvent(e, target);
}, 50);
this.fire('mouse:up', { target: target, e: e });
target && target.fire('mouseup', { e: e });
},
/**
* Method that defines the actions when mouse is clic ked 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.
* @method __onMouseDown
* @param e {Event} Event object fired on mousedown
*
*/
__onMouseDown: function (e) {
// accept only left clicks
var isLeftClick = 'which' in e ? e.which === 1 : e.button === 1;
if (!isLeftClick && !fabric.isTouchSupported) return;
if (this.isDrawingMode) {
this._prepareForDrawing(e);
// capture coordinates immediately; this allows to draw dots (when movement never occurs)
this._captureDrawingPath(e);
this.fire('mouse:down', { e: e });
return;
}
// ignore if some object is being transformed at this moment
if (this._currentTransform) return;
var target = this.findTarget(e),
pointer = this.getPointer(e),
activeGroup = this.getActiveGroup(),
corner;
if (this._shouldClearSelection(e)) {
this._groupSelector = {
ex: pointer.x,
ey: pointer.y,
top: 0,
left: 0
};
this.deactivateAllWithDispatch();
}
else {
// determine if it's a drag or rotate case
// rotate and scale will happen at the same time
this.stateful && target.saveState();
if ((corner = target._findTargetCorner(e, this._offset))) {
this.onBeforeScaleRotate(target);
}
var shouldHandleGroupLogic = e.shiftKey && (activeGroup || this.getActiveObject()) && this.selection;
if (shouldHandleGroupLogic) {
this._handleGroupLogic(e, target);
target = this.getActiveGroup();
}
else {
if (target !== this.getActiveGroup()) {
this.deactivateAll();
}
this.setActiveObject(target, e);
}
this._setupCurrentTransform(e, target);
}
// we must renderAll so that active image is placed on the top canvas
this.renderAll();
this.fire('mouse:down', { target: target, e: e });
target && target.fire('mousedown', { e: e });
},
/**
* Method that defines the actions when mouse is hovering the canvas.
* The currentTransform parameter will definde 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.
* @method __onMouseMove
* @param e {Event} Event object fired on mousemove
*
*/
__onMouseMove: function (e) {
var target;
if (this.isDrawingMode) {
if (this._isCurrentlyDrawing) {
this._captureDrawingPath(e);
}
this.fire('mouse:move', { e: e });
return;
}
var groupSelector = this._groupSelector, pointer;
// We initially clicked in an empty area, so we draw a box for multiple selection.
if (groupSelector !== null) {
pointer = getPointer(e);
groupSelector.left = pointer.x - this._offset.left - groupSelector.ex;
groupSelector.top = pointer.y - this._offset.top - groupSelector.ey;
this.renderTop();
}
else if (!this._currentTransform) {
// alias style to elimintate unnecessary lookup
var style = this.upperCanvasEl.style;
// Here we are hovering the canvas then we will determine
// what part of the pictures we are hovering to change the caret symbol.
// We won't do that while dragging or rotating in order to improve the
// performance.
target = this.findTarget(e);
if (!target) {
// image/text was hovered-out from, we remove its borders
for (var i = this._objects.length; i--; ) {
if (this._objects[i] && !this._objects[i].active) {
this._objects[i].setActive(false);
}
}
style.cursor = this.defaultCursor;
}
else {
// set proper cursor
this._setCursorFromEvent(e, target);
}
}
else {
// object is being transformed (scaled/rotated/moved/etc.)
pointer = getPointer(e);
var x = pointer.x,
y = pointer.y;
this._currentTransform.target.isMoving = true;
if (this._currentTransform.action === 'rotate') {
// rotate object only if shift key is not pressed
// and if it is not a group we are transforming
if (!e.shiftKey) {
this._rotateObject(x, y);
this.fire('object:rotating', {
target: this._currentTransform.target
});
this._currentTransform.target.fire('rotating');
}
if (!this._currentTransform.target.hasRotatingPoint) {
this._scaleObject(x, y);
this.fire('object:scaling', {
target: this._currentTransform.target
});
this._currentTransform.target.fire('scaling');
}
}
else if (this._currentTransform.action === 'scale') {
this._scaleObject(x, y);
this.fire('object:scaling', {
target: this._currentTransform.target
});
this._currentTransform.target.fire('scaling');
}
else if (this._currentTransform.action === 'scaleX') {
this._scaleObject(x, y, 'x');
this.fire('object:scaling', {
target: this._currentTransform.target
});
this._currentTransform.target.fire('scaling');
}
else if (this._currentTransform.action === 'scaleY') {
this._scaleObject(x, y, 'y');
this.fire('object:scaling', {
target: this._currentTransform.target
});
this._currentTransform.target.fire('scaling');
}
else {
this._translateObject(x, y);
this.fire('object:moving', {
target: this._currentTransform.target
});
this._setCursor(this.moveCursor);
this._currentTransform.target.fire('moving');
}
// only commit here. when we are actually moving the pictures
this.renderAll();
}
this.fire('mouse:move', { target: target, e: e });
target && target.fire('mousemove', { e: e });
},
/**
* Applies one implementation of 'point inside polygon' algorithm
* @method containsPoint
* @param e { Event } event object
* @param target { fabric.Object } object to test against
* @return {Boolean} true if point contains within area of given object
*/
containsPoint: function (e, target) {
var pointer = this.getPointer(e),
xy = this._normalizePointer(target, pointer),
x = xy.x,
y = xy.y;
// http://www.geog.ubc.ca/courses/klink/gis.notes/ncgia/u32.html
// http://idav.ucdavis.edu/~okreylos/TAship/Spring2000/PointInPolygon.html
// we iterate through each object. If target found, return it.
var iLines = target._getImageLines(target.oCoords),
xpoints = target._findCrossPoints(x, y, iLines);
// if xcount is odd then we clicked inside the object
// For the specific case of square images xcount === 1 in all true cases
if ((xpoints && xpoints % 2 === 1) || target._findTargetCorner(e, this._offset)) {
return true;
}
return false;
},
/**
* @private
* @method _normalizePointer
*/
_normalizePointer: function (object, pointer) {
var activeGroup = this.getActiveGroup(),
x = pointer.x,
y = pointer.y;
var isObjectInGroup = (
activeGroup &&
object.type !== 'group' &&
activeGroup.contains(object)
);
if (isObjectInGroup) {
x -= activeGroup.left;
y -= activeGroup.top;
}
return { x: x, y: y };
},
_isTargetTransparent: function (target, x, y) {
var cacheContext = this.contextCache;
var hasBorders = target.hasBorders, transparentCorners = target.transparentCorners;
target.hasBorders = target.transparentCorners = false;
this._draw(cacheContext, target);
target.hasBorders = hasBorders;
target.transparentCorners = transparentCorners;
// If tolerance is > 0 adjust start coords to take into account. If moves off Canvas fix to 0
if (this.targetFindTolerance > 0) {
if (x > this.targetFindTolerance) {
x -= this.targetFindTolerance;
}
else {
x = 0;
}
if (y > this.targetFindTolerance) {
y -= this.targetFindTolerance;
}
else {
y = 0;
}
}
var isTransparent = true;
var imageData = cacheContext.getImageData(
x, y, (this.targetFindTolerance * 2) || 1, (this.targetFindTolerance * 2) || 1);
// Split image data - for tolerance > 1, pixelDataSize = 4;
for (var i = 3; i < imageData.data.length; i += 4) {
var temp = imageData.data[i];
isTransparent = temp <= 0;
if (isTransparent === false) break; //Stop if colour found
}
imageData = null;
this.clearContext(cacheContext);
return isTransparent;
},
/**
* @private
* @method _shouldClearSelection
*/
_shouldClearSelection: function (e) {
var target = this.findTarget(e),
activeGroup = this.getActiveGroup();
return (
!target || (
target &&
activeGroup &&
!activeGroup.contains(target) &&
activeGroup !== target &&
!e.shiftKey
)
);
},
/**
* @private
* @method _setupCurrentTransform
*/
_setupCurrentTransform: function (e, target) {
var action = 'drag',
corner,
pointer = getPointer(e);
if ((corner = target._findTargetCorner(e, this._offset))) {
action = (corner === 'ml' || corner === 'mr')
? 'scaleX'
: (corner === 'mt' || corner === 'mb')
? 'scaleY'
: corner === 'mtr'
? 'rotate'
: (target.hasRotatingPoint)
? 'scale'
: 'rotate';
}
this._currentTransform = {
target: target,
action: action,
scaleX: target.scaleX,
scaleY: target.scaleY,
offsetX: pointer.x - target.left,
offsetY: pointer.y - target.top,
ex: pointer.x,
ey: pointer.y,
left: target.left,
top: target.top,
theta: target._theta,
width: target.width * target.scaleX
};
this._currentTransform.original = {
left: target.left,
top: target.top
};
},
_handleGroupLogic: function (e, target) {
if (target === this.getActiveGroup()) {
// if it's a group, find target again, this time skipping group
target = this.findTarget(e, true);
// if even object is not found, bail out
if (!target || target.isType('group')) {
return;
}
}
var activeGroup = this.getActiveGroup();
if (activeGroup) {
if (activeGroup.contains(target)) {
activeGroup.removeWithUpdate(target);
this._resetObjectTransform(activeGroup);
target.setActive(false);
if (activeGroup.size() === 1) {
// remove group alltogether if after removal it only contains 1 object
this.discardActiveGroup();
}
}
else {
activeGroup.addWithUpdate(target);
this._resetObjectTransform(activeGroup);
}
this.fire('selection:created', { target: activeGroup, e: e });
activeGroup.setActive(true);
}
else {
// group does not exist
if (this._activeObject) {
// only if there's an active object
if (target !== this._activeObject) {
// and that object is not the actual target
var group = new fabric.Group([ this._activeObject, target ]);
this.setActiveGroup(group);
activeGroup = this.getActiveGroup();
}
}
// activate target object in any case
target.setActive(true);
}
if (activeGroup) {
activeGroup.saveCoords();
}
},
/**
* @private
* @method _prepareForDrawing
*/
_prepareForDrawing: function(e) {
this._isCurrentlyDrawing = true;
this.discardActiveObject().renderAll();
var pointer = this.getPointer(e);
this._freeDrawingXPoints.length = this._freeDrawingYPoints.length = 0;
this._freeDrawingXPoints.push(pointer.x);
this._freeDrawingYPoints.push(pointer.y);
this.contextTop.beginPath();
this.contextTop.moveTo(pointer.x, pointer.y);
this.contextTop.strokeStyle = this.freeDrawingColor;
this.contextTop.lineWidth = this.freeDrawingLineWidth;
this.contextTop.lineCap = this.contextTop.lineJoin = 'round';
},
/**
* @private
* @method _captureDrawingPath
*/
_captureDrawingPath: function(e) {
var pointer = this.getPointer(e);
this._freeDrawingXPoints.push(pointer.x);
this._freeDrawingYPoints.push(pointer.y);
this.contextTop.lineTo(pointer.x, pointer.y);
this.contextTop.stroke();
},
/**
* @private
* @method _finalizeDrawingPath
*/
_finalizeDrawingPath: function() {
this.contextTop.closePath();
this._isCurrentlyDrawing = false;
var minX = utilMin(this._freeDrawingXPoints),
minY = utilMin(this._freeDrawingYPoints),
maxX = utilMax(this._freeDrawingXPoints),
maxY = utilMax(this._freeDrawingYPoints),
path = [ ],
xPoints = this._freeDrawingXPoints,
yPoints = this._freeDrawingYPoints;
path.push('M ', xPoints[0] - minX, ' ', yPoints[0] - minY, ' ');
for (var i = 1, len = xPoints.length; i < len; i++) {
path.push('L ', xPoints[i] - minX, ' ', yPoints[i] - minY, ' ');
}
// TODO (kangax): maybe remove Path creation from here, to decouple fabric.Canvas from fabric.Path,
// and instead fire something like "drawing:completed" event with path string
path = path.join('');
if (path === "M 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.renderAll();
return;
}
var p = new fabric.Path(path);
p.fill = null;
p.stroke = this.freeDrawingColor;
p.strokeWidth = this.freeDrawingLineWidth;
this.add(p);
p.set("left", minX + (maxX - minX) / 2).set("top", minY + (maxY - minY) / 2).setCoords();
this.renderAll();
this.fire('path:created', { path: p });
},
/**
* Translates object by "setting" its left/top
* @method _translateObject
* @param x {Number} pointer's x coordinate
* @param y {Number} pointer's y coordinate
*/
_translateObject: function (x, y) {
var target = this._currentTransform.target;
target.lockMovementX || target.set('left', x - this._currentTransform.offsetX);
target.lockMovementY || target.set('top', y - this._currentTransform.offsetY);
},
/**
* Scales object by invoking its scaleX/scaleY methods
* @method _scaleObject
* @param x {Number} pointer's x coordinate
* @param y {Number} pointer's y coordinate
* @param by {String} Either 'x' or 'y' - specifies dimension constraint by which to scale an object.
* When not provided, an object is scaled by both dimensions equally
*/
_scaleObject: function (x, y, by) {
var t = this._currentTransform,
offset = this._offset,
target = t.target;
if (target.lockScalingX && target.lockScalingY) return;
var lastLen = sqrt(pow(t.ey - t.top - offset.top, 2) + pow(t.ex - t.left - offset.left, 2)),
curLen = sqrt(pow(y - t.top - offset.top, 2) + pow(x - t.left - offset.left, 2));
target._scaling = true;
if (!by) {
target.lockScalingX || target.set('scaleX', t.scaleX * curLen/lastLen);
target.lockScalingY || target.set('scaleY', t.scaleY * curLen/lastLen);
}
else if (by === 'x' && !target.lockUniScaling) {
target.lockScalingX || target.set('scaleX', t.scaleX * curLen/lastLen);
}
else if (by === 'y' && !target.lockUniScaling) {
target.lockScalingY || target.set('scaleY', t.scaleY * curLen/lastLen);
}
},
/**
* Rotates object by invoking its rotate method
* @method _rotateObject
* @param x {Number} pointer's x coordinate
* @param y {Number} pointer's y coordinate
*/
_rotateObject: function (x, y) {
var t = this._currentTransform,
o = this._offset;
if (t.target.lockRotation) return;
var lastAngle = atan2(t.ey - t.top - o.top, t.ex - t.left - o.left),
curAngle = atan2(y - t.top - o.top, x - t.left - o.left);
t.target._theta = (curAngle - lastAngle) + t.theta;
},
/**
* @method _setCursor
*/
_setCursor: function (value) {
this.upperCanvasEl.style.cursor = value;
},
/**
* @private
* @method _resetObjectTransform:
*/
_resetObjectTransform: function (target) {
target.scaleX = 1;
target.scaleY = 1;
target.setAngle(0);
},
/**
* Sets the cursor depending on where the canvas is being hovered.
* Note: very buggy in Opera
* @method _setCursorFromEvent
* @param e {Event} Event object
* @param target {Object} Object that the mouse is hovering, if so.
*/
_setCursorFromEvent: function (e, target) {
var s = this.upperCanvasEl.style;
if (!target) {
s.cursor = this.defaultCursor;
return false;
}
else {
var activeGroup = this.getActiveGroup();
// only show proper corner when group selection is not active
var corner = !!target._findTargetCorner
&& (!activeGroup || !activeGroup.contains(target))
&& target._findTargetCorner(e, this._offset);
if (!corner) {
s.cursor = this.hoverCursor;
}
else {
if (corner in cursorMap) {
s.cursor = cursorMap[corner];
} else if (corner === 'mtr' && target.hasRotatingPoint) {
s.cursor = this.rotationCursor;
} else {
s.cursor = this.defaultCursor;
return false;
}
}
}
return true;
},
/**
* @method _drawSelection
* @private
*/
_drawSelection: function () {
var groupSelector = this._groupSelector,
left = groupSelector.left,
top = groupSelector.top,
aleft = abs(left),
atop = abs(top);
this.contextTop.fillStyle = this.selectionColor;
this.contextTop.fillRect(
groupSelector.ex - ((left > 0) ? 0 : -left),
groupSelector.ey - ((top > 0) ? 0 : -top),
aleft,
atop
);
this.contextTop.lineWidth = this.selectionLineWidth;
this.contextTop.strokeStyle = this.selectionBorderColor;
this.contextTop.strokeRect(
groupSelector.ex + STROKE_OFFSET - ((left > 0) ? 0 : aleft),
groupSelector.ey + STROKE_OFFSET - ((top > 0) ? 0 : atop),
aleft,
atop
);
},
_findSelectedObjects: function (e) {
var group = [ ],
x1 = this._groupSelector.ex,
y1 = this._groupSelector.ey,
x2 = x1 + this._groupSelector.left,
y2 = y1 + this._groupSelector.top,
currentObject,
selectionX1Y1 = new fabric.Point(min(x1, x2), min(y1, y2)),
selectionX2Y2 = new fabric.Point(max(x1, x2), max(y1, y2));
for (var i = 0, len = this._objects.length; i < len; ++i) {
currentObject = this._objects[i];
if (!currentObject) continue;
if (currentObject.intersectsWithRect(selectionX1Y1, selectionX2Y2) ||
currentObject.isContainedWithinRect(selectionX1Y1, selectionX2Y2)) {
if (this.selection && currentObject.selectable) {
currentObject.setActive(true);
group.push(currentObject);
}
}
}
// do not create group for 1 element only
if (group.length === 1) {
this.setActiveObject(group[0], e);
}
else if (group.length > 1) {
group = new fabric.Group(group);
this.setActiveGroup(group);
group.saveCoords();
this.fire('selection:created', { target: group });
}
this.renderAll();
},
/**
* Method that determines what object we are clicking on
* @method findTarget
* @param {Event} e mouse event
* @param {Boolean} skipGroup when true, group is skipped and only objects are traversed through
*/
findTarget: function (e, skipGroup) {
var target,
pointer = this.getPointer(e);
if (this.controlsAboveOverlay &&
this.lastRenderedObjectWithControlsAboveOverlay &&
this.containsPoint(e, this.lastRenderedObjectWithControlsAboveOverlay)) {
target = this.lastRenderedObjectWithControlsAboveOverlay;
return target;
}
// first check current group (if one exists)
var activeGroup = this.getActiveGroup();
if (activeGroup && !skipGroup && this.containsPoint(e, activeGroup)) {
target = activeGroup;
return target;
}
// then check all of the objects on canvas
// Cache all targets where their bounding box contains point.
var possibleTargets = [];
for (var i = this._objects.length; i--; ) {
if (this._objects[i] && this.containsPoint(e, this._objects[i])) {
if (this.perPixelTargetFind || this._objects[i].perPixelTargetFind) {
possibleTargets[possibleTargets.length] = this._objects[i];
}
else {
target = this._objects[i];
this.relatedTarget = target;
break;
}
}
}
for (var j = 0, len = possibleTargets.length; j < len; j++) {
pointer = this.getPointer(e);
var isTransparent = this._isTargetTransparent(possibleTargets[j], pointer.x, pointer.y);
if (!isTransparent) {
target = possibleTargets[j];
this.relatedTarget = target;
break;
}
}
if (target && target.selectable) {
return target;
}
},
/**
* Returns pointer coordinates relative to canvas.
* @method getPointer
* @return {Object} object with "x" and "y" number values
*/
getPointer: function (e) {
var pointer = getPointer(e);
return {
x: pointer.x - this._offset.left,
y: pointer.y - this._offset.top
};
},
/**
* @method _createUpperCanvas
* @param {HTMLElement|String} canvasEl Canvas element
* @throws {CANVAS_INIT_ERROR} If canvas can not be initialized
*/
_createUpperCanvas: function () {
this.upperCanvasEl = this._createCanvasElement();
this.upperCanvasEl.className = 'upper-canvas';
this.wrapperEl.appendChild(this.upperCanvasEl);
this._applyCanvasStyle(this.upperCanvasEl);
this.contextTop = this.upperCanvasEl.getContext('2d');
},
_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
* @method _initWrapperElement
* @param {Number} width
* @param {Number} height
*/
_initWrapperElement: function () {
this.wrapperEl = fabric.util.wrapElement(this.lowerCanvasEl, 'div', {
'class': this.containerClass
});
fabric.util.setStyle(this.wrapperEl, {
width: this.getWidth() + 'px',
height: this.getHeight() + 'px',
position: 'relative'
});
fabric.util.makeElementUnselectable(this.wrapperEl);
},
/**
* @private
* @method _applyCanvasStyle
* @param {Element} element
*/
_applyCanvasStyle: function (element) {
var width = this.getWidth() || element.width,
height = this.getHeight() || element.height;
fabric.util.setStyle(element, {
position: 'absolute',
width: width + 'px',
height: height + 'px',
left: 0,
top: 0
});
element.width = width;
element.height = height;
fabric.util.makeElementUnselectable(element);
},
/**
* Returns context of canvas where object selection is drawn
* @method getSelectionContext
* @return {CanvasRenderingContext2D}
*/
getSelectionContext: function() {
return this.contextTop;
},
/**
* Returns <canvas> element on which object selection is drawn
* @method getSelectionElement
* @return {HTMLCanvasElement}
*/
getSelectionElement: function () {
return this.upperCanvasEl;
},
/**
* Sets given object as active
* @method setActiveObject
* @param object {fabric.Object} Object to set as an active one
* @return {fabric.Canvas} thisArg
* @chainable
*/
setActiveObject: function (object, e) {
if (this._activeObject) {
this._activeObject.setActive(false);
}
this._activeObject = object;
object.setActive(true);
this.renderAll();
this.fire('object:selected', { target: object, e: e });
object.fire('selected', { e: e });
return this;
},
/**
* Returns currently active object
* @method getActiveObject
* @return {fabric.Object} active object
*/
getActiveObject: function () {
return this._activeObject;
},
/**
* Discards currently active object
* @method discardActiveObject
* @return {fabric.Canvas} thisArg
* @chainable
*/
discardActiveObject: function () {
if (this._activeObject) {
this._activeObject.setActive(false);
}
this._activeObject = null;
return this;
},
/**
* Sets active group to a speicified one
* @method setActiveGroup
* @param {fabric.Group} group Group to set as a current one
* @return {fabric.Canvas} thisArg
* @chainable
*/
setActiveGroup: function (group) {
this._activeGroup = group;
group && group.setActive(true);
return this;
},
/**
* Returns currently active group
* @method getActiveGroup
* @return {fabric.Group} Current group
*/
getActiveGroup: function () {
return this._activeGroup;
},
/**
* Removes currently active group
* @method discardActiveGroup
* @return {fabric.Canvas} thisArg
*/
discardActiveGroup: function () {
var g = this.getActiveGroup();
if (g) {
g.destroy();
}
return this.setActiveGroup(null);
},
/**
* Deactivates all objects by calling their setActive(false)
* @method deactivateAll
* @return {fabric.Canvas} thisArg
*/
deactivateAll: function () {
var allObjects = this.getObjects(),
i = 0,
len = allObjects.length;
for ( ; i < len; i++) {
allObjects[i].setActive(false);
}
this.discardActiveGroup();
this.discardActiveObject();
return this;
},
/**
* Deactivates all objects and dispatches appropriate events
* @method deactivateAllWithDispatch
* @return {fabric.Canvas} thisArg
*/
deactivateAllWithDispatch: function () {
var activeObject = this.getActiveGroup() || this.getActiveObject();
if (activeObject) {
this.fire('before:selection:cleared', { target: activeObject });
}
this.deactivateAll();
if (activeObject) {
this.fire('selection:cleared');
}
return this;
}
};
fabric.Canvas.prototype.toString = fabric.StaticCanvas.prototype.toString;
extend(fabric.Canvas.prototype, InteractiveMethods);
// iterating manually to workaround 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];
}
}
if (fabric.isTouchSupported) {
fabric.Canvas.prototype._setCursorFromEvent = function() { };
}
/**
* @class fabric.Element
* @alias fabric.Canvas
* @deprecated
* @constructor
*/
fabric.Element = fabric.Canvas;
})();
fabric.util.object.extend(fabric.StaticCanvas.prototype, {
FX_DURATION: 500,
/**
* Centers object horizontally with animation.
* @method fxCenterObjectH
* @param {fabric.Object} object Object to center
* @param {Object} [callbacks] Callbacks object with optional "onComplete" and/or "onChange" properties
* @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.get('left'),
endValue: this.getCenter().left,
duration: this.FX_DURATION,
onChange: function(value) {
object.set('left', value);
_this.renderAll();
onChange();
},
onComplete: function() {
object.setCoords();
onComplete();
}
});
return this;
},
/**
* Centers object vertically with animation.
* @method fxCenterObjectV
* @param {fabric.Object} object Object to center
* @param {Object} [callbacks] Callbacks object with optional "onComplete" and/or "onChange" properties
* @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.get('top'),
endValue: this.getCenter().top,
duration: this.FX_DURATION,
onChange: function(value) {
object.set('top', value);
_this.renderAll();
onChange();
},
onComplete: function() {
object.setCoords();
onComplete();
}
});
return this;
},
/**
* Same as `fabric.Canvas#remove` but animated
* @method fxRemove
* @param {fabric.Object} object Object to remove
* @param {Function} callback Callback, invoked on effect completion
* @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.get('opacity'),
endValue: 0,
duration: this.FX_DURATION,
onStart: function() {
object.setActive(false);
},
onChange: function(value) {
object.set('opacity', value);
_this.renderAll();
onChange();
},
onComplete: function () {
_this.remove(object);
onComplete();
}
});
return this;
}
});
fabric.util.object.extend(fabric.StaticCanvas.prototype, {
/**
* Populates canvas with data from the specified dataless JSON
* JSON format must conform to the one of `fabric.Canvas#toDatalessJSON`
* @method loadFromDatalessJSON
* @param {String} json JSON string
* @param {Function} callback Callback, invoked when json is parsed
* and corresponding objects (e.g: fabric.Image)
* are initialized
* @return {fabric.Canvas} instance
* @chainable
*/
loadFromDatalessJSON: function (json, callback) {
if (!json) {
return;
}
// serialize if it wasn't already
var serialized = (typeof json === 'string')
? JSON.parse(json)
: json;
if (!serialized || (serialized && !serialized.objects)) return;
this.clear();
// TODO: test this
this.backgroundColor = serialized.background;
this._enlivenDatalessObjects(serialized.objects, callback);
},
/**
* @method _enlivenDatalessObjects
* @param {Array} objects
* @param {Function} callback
*/
_enlivenDatalessObjects: function (objects, callback) {
/** @ignore */
function onObjectLoaded(object, index) {
_this.insertAt(object, index, true);
object.setCoords();
if (++numLoadedObjects === numTotalObjects) {
callback && callback();
}
}
/** @ignore */
function loadObject(obj, index) {
var pathProp = obj.paths ? 'paths' : 'path';
var path = obj[pathProp];
delete obj[pathProp];
if (typeof path !== 'string') {
if (obj.type === 'image') {
fabric[fabric.util.string.capitalize(obj.type)].fromObject(obj, function (o) {
onObjectLoaded(o, index);
});
}
else {
var klass = fabric[fabric.util.string.camelize(fabric.util.string.capitalize(obj.type))];
if (!klass || !klass.fromObject) return;
// restore path
if (path) {
obj[pathProp] = path;
}
onObjectLoaded(klass.fromObject(obj), index);
}
}
else {
if (obj.type === 'image') {
fabric.util.loadImage(path, function (image) {
var oImg = new fabric.Image(image);
oImg.setSourcePath(path);
fabric.util.object.extend(oImg, obj);
oImg.setAngle(obj.angle);
onObjectLoaded(oImg, index);
});
}
else if (obj.type === 'text') {
if (obj.useNative) {
onObjectLoaded(fabric.Text.fromObject(obj), index);
}
else {
obj.path = path;
var object = fabric.Text.fromObject(obj);
var onscriptload = function () {
// TODO (kangax): find out why Opera refuses to work without this timeout
if (Object.prototype.toString.call(fabric.window.opera) === '[object Opera]') {
setTimeout(function () {
onObjectLoaded(object, index);
}, 500);
}
else {
onObjectLoaded(object, index);
}
};
fabric.util.getScript(path, onscriptload);
}
}
else {
fabric.loadSVGFromURL(path, function (elements) {
var object = fabric.util.groupSVGElements(elements, obj, path);
// copy parameters from serialied json to object (left, top, scaleX, scaleY, etc.)
// skip this step if an object is a PathGroup, since we already passed it options object before
if (!(object instanceof fabric.PathGroup)) {
fabric.util.object.extend(object, obj);
if (typeof obj.angle !== 'undefined') {
object.setAngle(obj.angle);
}
}
onObjectLoaded(object, index);
});
}
}
}
var _this = this,
numLoadedObjects = 0,
numTotalObjects = objects.length;
if (numTotalObjects === 0 && callback) {
callback();
}
try {
objects.forEach(loadObject, this);
}
catch(e) {
fabric.log(e.message);
}
},
/**
* Populates canvas with data from the specified JSON
* JSON format must conform to the one of `fabric.Canvas#toJSON`
* @method loadFromJSON
* @param {String} json JSON string
* @param {Function} callback Callback, invoked when json is parsed
* and corresponding objects (e.g: fabric.Image)
* are initialized
* @return {fabric.Canvas} instance
* @chainable
*/
loadFromJSON: function (json, callback) {
if (!json) return;
var serialized = JSON.parse(json);
if (!serialized || (serialized && !serialized.objects)) return;
this.clear();
var _this = this;
this._enlivenObjects(serialized.objects, function () {
_this.backgroundColor = serialized.background;
if (serialized.backgroundImage) {
_this.setBackgroundImage(serialized.backgroundImage, function() {
_this.backgroundImageOpacity = serialized.backgroundImageOpacity;
_this.backgroundImageStretch = serialized.backgroundImageStretch;
_this.renderAll();
callback && callback();
});
return;
}
if (serialized.overlayImage) {
_this.setOverlayImage(serialized.overlayImage, function() {
_this.overlayImageLeft = serialized.overlayImageLeft || 0;
_this.overlayImageTop = serialized.overlayImageTop || 0;
_this.renderAll();
callback && callback();
});
return;
}
callback && callback();
});
return this;
},
/**
* @method _enlivenObjects
* @param {Array} objects
* @param {Function} callback
*/
_enlivenObjects: function (objects, callback) {
var _this = this;
fabric.util.enlivenObjects(objects, function(enlivenedObjects) {
enlivenedObjects.forEach(function(obj, index) {
_this.insertAt(obj, index, true);
});
callback && callback();
});
},
/**
* @private
* @method _toDataURL
* @param {String} format
* @param {Function} callback
*/
_toDataURL: function (format, callback) {
this.clone(function (clone) {
callback(clone.toDataURL(format));
});
},
/**
* @private
* @method _toDataURLWithMultiplier
* @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
* @method clone
* @param {Object} [callback] Receives cloned instance as a first argument
*/
clone: function (callback) {
var data = JSON.stringify(this);
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)
* @method cloneWithoutData
* @param {Object} [callback] Receives cloned instance as a first argument
*/
cloneWithoutData: function(callback) {
var el = fabric.document.createElement('canvas');
el.width = this.getWidth();
el.height = this.getHeight();
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,
toFixed = fabric.util.toFixed,
capitalize = fabric.util.string.capitalize,
getPointer = fabric.util.getPointer,
degreesToRadians = fabric.util.degreesToRadians,
slice = Array.prototype.slice;
if (fabric.Object) {
return;
}
/**
* @class Object
* @memberOf fabric
*/
fabric.Object = fabric.util.createClass(/** @scope fabric.Object.prototype */ {
/**
* Type of an object (rect, circle, path, etc)
* @property
* @type String
*/
type: 'object',
/**
* @property
* @type Number
*/
top: 0,
/**
* @property
* @type Number
*/
left: 0,
/**
* @property
* @type Number
*/
width: 0,
/**
* @property
* @type Number
*/
height: 0,
/**
* @property
* @type Number
*/
scaleX: 1,
/**
* @property
* @type Number
*/
scaleY: 1,
/**
* @property
* @type Boolean
*/
flipX: false,
/**
* @property
* @type Boolean
*/
flipY: false,
/**
* @property
* @type Number
*/
opacity: 1,
/**
* @property
* @type Number
*/
angle: 0,
/**
* @property
* @type Number
*/
cornersize: 12,
/**
* @property
* @type Boolean
*/
transparentCorners: true,
/**
* @property
* @type Number
*/
padding: 0,
/**
* @property
* @type String
*/
borderColor: 'rgba(102,153,255,0.75)',
/**
* @property
* @type String
*/
cornerColor: 'rgba(102,153,255,0.5)',
/**
* @property
* @type String
*/
fill: 'rgb(0,0,0)',
/**
* @property
* @type String
*/
fillRule: 'source-over',
/**
* @property
* @type String
*/
overlayFill: null,
/**
* @property
* @type String
*/
stroke: null,
/**
* @property
* @type Number
*/
strokeWidth: 1,
/**
* @property
* @type Array
*/
strokeDashArray: null,
/**
* @property
* @type Number
*/
borderOpacityWhenMoving: 0.4,
/**
* @property
* @type Number
*/
borderScaleFactor: 1,
/**
* Transform matrix
* @property
* @type Array
*/
transformMatrix: null,
/**
* When set to `false`, an object can not be selected for modification (using either point-click-based or group-based selection)
* @property
* @type Boolean
*/
selectable: true,
/**
* When set to `false`, object's controls are not displayed and can not be used to manipulate object
* @property
* @type Boolean
*/
hasControls: true,
/**
* When set to `false`, object's borders are not rendered
* @property
* @type Boolean
*/
hasBorders: true,
/**
* When set to `false`, object's rotating point will not be visible or selectable
* @property
* @type Boolean
*/
hasRotatingPoint: false,
/**
* Offset for object's rotating point (when enabled)
* @property
* @type Number
*/
rotatingPointOffset: 40,
/**
* @private
* @property
* @type Number
*/
_theta: 0,
perPixelTargetFind: false,
includeDefaultValues: true,
/**
* 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
* @property
* @type Array
*/
stateProperties: (
'top left width height scaleX scaleY flipX flipY ' +
'theta angle opacity cornersize fill overlayFill ' +
'stroke strokeWidth strokeDashArray fillRule ' +
'borderScaleFactor transformMatrix selectable'
).split(' '),
/**
* @method callSuper
* @param {String} methodName
*/
callSuper: function(methodName) {
var fn = this.constructor.superclass.prototype[methodName];
return (arguments.length > 1)
? fn.apply(this, slice.call(arguments, 1))
: fn.call(this);
},
/**
* Constructor
* @method initialize
* @param {Object} [options] Options object
*/
initialize: function(options) {
if (options) {
this.setOptions(options);
}
},
/**
* @method initGradient
*/
_initGradient: function(options) {
if (options.fill && typeof options.fill === 'object' && !(options.fill instanceof fabric.Gradient)) {
this.set('fill', new fabric.Gradient(options.fill));
}
},
/**
* @method setOptions
* @param {Object} [options]
*/
setOptions: function(options) {
var i = this.stateProperties.length, prop;
while (i--) {
prop = this.stateProperties[i];
if (prop in options) {
this.set(prop, options[prop]);
}
}
this._initGradient(options);
},
/**
* @method transform
* @param {CanvasRenderingContext2D} ctx Context
*/
transform: function(ctx) {
ctx.globalAlpha = this.opacity;
ctx.translate(this.left, this.top);
ctx.rotate(this._theta);
ctx.scale(
this.scaleX * (this.flipX ? -1 : 1),
this.scaleY * (this.flipY ? -1 : 1)
);
},
/**
* Returns an object representation of an instance
* @method toObject
* @return {Object}
*/
toObject: function() {
var NUM_FRACTION_DIGITS = fabric.Object.NUM_FRACTION_DIGITS;
var object = {
type: this.type,
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,
overlayFill: this.overlayFill,
stroke: this.stroke,
strokeWidth: this.strokeWidth,
strokeDashArray: this.strokeDashArray,
scaleX: toFixed(this.scaleX, NUM_FRACTION_DIGITS),
scaleY: toFixed(this.scaleY, NUM_FRACTION_DIGITS),
angle: toFixed(this.getAngle(), NUM_FRACTION_DIGITS),
flipX: this.flipX,
flipY: this.flipY,
opacity: toFixed(this.opacity, NUM_FRACTION_DIGITS),
selectable: this.selectable,
hasControls: this.hasControls,
hasBorders: this.hasBorders,
hasRotatingPoint: this.hasRotatingPoint,
transparentCorners: this.transparentCorners,
perPixelTargetFind: this.perPixelTargetFind
};
if (!this.includeDefaultValues) {
object = this._removeDefaultValues(object);
}
return object;
},
/**
* Returns (dataless) object representation of an instance
* @method toDatalessObject
*/
toDatalessObject: function() {
// will be overwritten by subclasses
return this.toObject();
},
/**
* Returns styles-string for svg-export
* @method getSvgStyles
* @return {string}
*/
getSvgStyles: function() {
return [
"stroke: ", (this.stroke ? this.stroke : 'none'), "; ",
"stroke-width: ", (this.strokeWidth ? this.strokeWidth : '0'), "; ",
"stroke-dasharray: ", (this.strokeDashArray ? this.strokeDashArray.join(' ') : "; "),
"fill: ", (this.fill ? this.fill : 'none'), "; ",
"opacity: ", (this.opacity ? this.opacity : '1'), ";"
].join("");
},
/**
* Returns transform-string for svg-export
* @method getSvgTransform
* @return {string}
*/
getSvgTransform: function() {
var angle = this.getAngle();
var NUM_FRACTION_DIGITS = fabric.Object.NUM_FRACTION_DIGITS;
var translatePart = "translate(" +
toFixed(this.left, NUM_FRACTION_DIGITS) +
" " +
toFixed(this.top, NUM_FRACTION_DIGITS) +
")";
var anglePart = angle !== 0
? (" rotate(" + toFixed(angle, NUM_FRACTION_DIGITS) + ")")
: '';
var scalePart = (this.scaleX === 1 && this.scaleY === 1)
? '' :
(" scale(" +
toFixed(this.scaleX, NUM_FRACTION_DIGITS) +
" " +
toFixed(this.scaleY, NUM_FRACTION_DIGITS) +
")");
var flipXPart = this.flipX ? "matrix(-1 0 0 1 0 0) " : "";
var flipYPart = this.flipY ? "matrix(1 0 0 -1 0 0)" : "";
return [ translatePart, anglePart, scalePart, flipXPart, flipYPart ].join('');
},
/**
* @private
* @method _removeDefaultValues
*/
_removeDefaultValues: function(object) {
var defaultOptions = fabric.Object.prototype.options;
if (defaultOptions) {
this.stateProperties.forEach(function(prop) {
if (object[prop] === defaultOptions[prop]) {
delete object[prop];
}
});
}
return object;
},
/**
* Returns true if an object is in its active state
* @return {Boolean} true if an object is in its active state
*/
isActive: function() {
return !!this.active;
},
/**
* Sets state of an object - `true` makes it active, `false` - inactive
* @param {Boolean} active
* @return {fabric.Object} thisArg
* @chainable
*/
setActive: function(active) {
this.active = !!active;
return this;
},
/**
* Returns a string representation of an instance
* @return {String}
*/
toString: function() {
return "#";
},
/**
* Sets property to a given value
* @method set
* @param {String} name
* @param {Object|Function} value
* @return {fabric.Group} thisArg
* @chainable
*/
set: function(key, value) {
if (typeof key === 'object') {
for (var prop in key) {
this._set(prop, key[prop]);
}
}
else {
if (typeof value === 'function') {
this._set(key, value(this.get(key)));
}
else {
this._set(key, value);
}
}
return this;
},
_set: function(key, value) {
var shouldConstrainValue = (key === 'scaleX' || key === 'scaleY') &&
value < fabric.Object.MIN_SCALE_LIMIT;
if (shouldConstrainValue) {
value = fabric.Object.MIN_SCALE_LIMIT;
}
if (key === 'angle') {
this.setAngle(value);
}
else {
this[key] = value;
}
},
/**
* Toggles specified property from `true` to `false` or from `false` to `true`
* @method toggle
* @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;
},
/**
* @method setSourcePath
* @param {String} value
* @return {fabric.Object} thisArg
* @chainable
*/
setSourcePath: function(value) {
this.sourcePath = value;
return this;
},
/**
* Basic getter
* @method get
* @param {Any} property
* @return {Any} value of a property
*/
get: function(property) {
return (property === 'angle')
? this.getAngle()
: this[property];
},
/**
* @method render
* @param {CanvasRenderingContext2D} ctx context to render on
* @param {Boolean} noTransform
*/
render: function(ctx, noTransform) {
// do not render if width or height are zeros
if (this.width === 0 || this.height === 0) return;
ctx.save();
var m = this.transformMatrix;
if (m && !this.group) {
ctx.setTransform(m[0], m[1], m[2], m[3], m[4], m[5]);
}
if (!noTransform) {
this.transform(ctx);
}
if (this.stroke || this.strokeDashArray) {
ctx.lineWidth = this.strokeWidth;
ctx.strokeStyle = this.stroke;
}
if (this.overlayFill) {
ctx.fillStyle = this.overlayFill;
}
else if (this.fill) {
ctx.fillStyle = this.fill.toLiveGradient
? this.fill.toLiveGradient(ctx)
: this.fill;
}
if (m && this.group) {
ctx.translate(-this.group.width/2, -this.group.height/2);
ctx.transform(m[0], m[1], m[2], m[3], m[4], m[5]);
}
this._render(ctx, noTransform);
if (this.active && !noTransform) {
this.drawBorders(ctx);
this.drawCorners(ctx);
}
ctx.restore();
},
/**
* Returns width of an object
* @method getWidth
* @return {Number} width value
*/
getWidth: function() {
return this.width * this.scaleX;
},
/**
* Returns height of an object
* @method getHeight
* @return {Number} height value
*/
getHeight: function() {
return this.height * this.scaleY;
},
/**
* Scales an object (equally by x and y)
* @method scale
* @param value {Number} scale factor
* @return {fabric.Object} thisArg
* @chainable
*/
scale: function(value) {
this.scaleX = value;
this.scaleY = value;
this.setCoords();
return this;
},
/**
* Scales an object to a given width, with respect to bounding box (scaling by x/y equally)
* @method scaleToWidth
* @param value {Number} new width value
* @return {fabric.Object} thisArg
* @chainable
*/
scaleToWidth: function(value) {
// adjust to bounding rect factor so that rotated shapes would fit as well
var boundingRectFactor = this.getBoundingRectWidth() / this.getWidth();
return this.scale(value / this.width / boundingRectFactor);
},
/**
* Scales an object to a given height, with respect to bounding box (scaling by x/y equally)
* @method scaleToHeight
* @param value {Number} new height value
* @return {fabric.Object} thisArg
* @chainable
*/
scaleToHeight: function(value) {
// adjust to bounding rect factor so that rotated shapes would fit as well
var boundingRectFactor = this.getBoundingRectHeight() / this.getHeight();
return this.scale(value / this.height / boundingRectFactor);
},
/**
* Sets object opacity
* @method setOpacity
* @param value {Number} value 0-1
* @return {fabric.Object} thisArg
* @chainable
*/
setOpacity: function(value) {
this.set('opacity', value);
return this;
},
/**
* Returns object's angle value
* @method getAngle
* @return {Number} angle value
*/
getAngle: function() {
return this._theta * 180 / Math.PI;
},
/**
* Sets object's angle
* @method setAngle
* @param value {Number} angle value
* @return {Object} thisArg
*/
setAngle: function(value) {
this._theta = value / 180 * Math.PI;
this.angle = value;
return this;
},
/**
* Sets corner position coordinates based on current angle, width and height.
* @method setCoords
* return {fabric.Object} thisArg
* @chainable
*/
setCoords: function() {
var strokeWidth = this.strokeWidth > 1 ? this.strokeWidth : 0,
padding = this.padding;
this.currentWidth = (this.width + strokeWidth) * this.scaleX + padding * 2;
this.currentHeight = (this.height + strokeWidth) * this.scaleY + padding * 2;
//If width is negative, make postive. Fixes path selection issue
if(this.currentWidth < 0){
this.currentWidth = Math.abs(this.currentWidth);
}
this._hypotenuse = Math.sqrt(
Math.pow(this.currentWidth / 2, 2) +
Math.pow(this.currentHeight / 2, 2));
this._angle = Math.atan(this.currentHeight / this.currentWidth);
// offset added for rotate and scale actions
var offsetX = Math.cos(this._angle + this._theta) * this._hypotenuse,
offsetY = Math.sin(this._angle + this._theta) * this._hypotenuse,
theta = this._theta,
sinTh = Math.sin(theta),
cosTh = Math.cos(theta);
var tl = {
x: this.left - offsetX,
y: this.top - offsetY
};
var tr = {
x: tl.x + (this.currentWidth * cosTh),
y: tl.y + (this.currentWidth * sinTh)
};
var br = {
x: tr.x - (this.currentHeight * sinTh),
y: tr.y + (this.currentHeight * cosTh)
};
var bl = {
x: tl.x - (this.currentHeight * sinTh),
y: tl.y + (this.currentHeight * cosTh)
};
var ml = {
x: tl.x - (this.currentHeight/2 * sinTh),
y: tl.y + (this.currentHeight/2 * cosTh)
};
var mt = {
x: tl.x + (this.currentWidth/2 * cosTh),
y: tl.y + (this.currentWidth/2 * sinTh)
};
var mr = {
x: tr.x - (this.currentHeight/2 * sinTh),
y: tr.y + (this.currentHeight/2 * cosTh)
};
var mb = {
x: bl.x + (this.currentWidth/2 * cosTh),
y: bl.y + (this.currentWidth/2 * sinTh)
};
var mtr = {
x: tl.x + (this.currentWidth/2 * cosTh),
y: tl.y + (this.currentWidth/2 * sinTh)
};
// debugging
// setTimeout(function() {
// 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);
// }, 50);
// clockwise
this.oCoords = { tl: tl, tr: tr, br: br, bl: bl, ml: ml, mt: mt, mr: mr, mb: mb, mtr: mtr };
// set coordinates of the draggable boxes in the corners used to scale/rotate the image
this._setCornerCoords();
return this;
},
/**
* Returns width of an object's bounding rectangle
* @method getBoundingRectWidth
* @return {Number} width value
*/
getBoundingRectWidth: function() {
this.oCoords || this.setCoords();
var xCoords = [this.oCoords.tl.x, this.oCoords.tr.x, this.oCoords.br.x, this.oCoords.bl.x];
var minX = fabric.util.array.min(xCoords);
var maxX = fabric.util.array.max(xCoords);
return Math.abs(minX - maxX);
},
/**
* Returns height of an object's bounding rectangle
* @method getBoundingRectHeight
* @return {Number} height value
*/
getBoundingRectHeight: function() {
this.oCoords || this.setCoords();
var yCoords = [this.oCoords.tl.y, this.oCoords.tr.y, this.oCoords.br.y, this.oCoords.bl.y];
var minY = fabric.util.array.min(yCoords);
var maxY = fabric.util.array.max(yCoords);
return Math.abs(minY - maxY);
},
/**
* Draws borders of an object's bounding box.
* Requires public properties: width, height
* Requires public options: padding, borderColor
* @method drawBorders
* @param {CanvasRenderingContext2D} ctx Context to draw on
* @return {fabric.Object} thisArg
* @chainable
*/
drawBorders: function(ctx) {
if (!this.hasBorders) return;
var MIN_SCALE_LIMIT = fabric.Object.MIN_SCALE_LIMIT,
padding = this.padding,
padding2 = padding * 2,
strokeWidth = this.strokeWidth > 1 ? this.strokeWidth : 0;
ctx.save();
ctx.globalAlpha = this.isMoving ? this.borderOpacityWhenMoving : 1;
ctx.strokeStyle = this.borderColor;
var scaleX = 1 / (this.scaleX < MIN_SCALE_LIMIT ? MIN_SCALE_LIMIT : this.scaleX),
scaleY = 1 / (this.scaleY < MIN_SCALE_LIMIT ? MIN_SCALE_LIMIT : this.scaleY);
ctx.lineWidth = 1 / this.borderScaleFactor;
ctx.scale(scaleX, scaleY);
var w = this.getWidth(),
h = this.getHeight();
ctx.strokeRect(
~~(-(w / 2) - padding - strokeWidth / 2 * this.scaleX) + 0.5, // offset needed to make lines look sharper
~~(-(h / 2) - padding - strokeWidth / 2 * this.scaleY) + 0.5,
~~(w + padding2 + strokeWidth * this.scaleX),
~~(h + padding2 + strokeWidth * this.scaleY)
);
if (this.hasRotatingPoint && !this.lockRotation && this.hasControls) {
var rotateHeight = (
this.flipY
? h + (strokeWidth * this.scaleY) + (padding * 2)
: -h - (strokeWidth * this.scaleY) - (padding * 2)
) / 2;
ctx.beginPath();
ctx.moveTo(0, rotateHeight);
ctx.lineTo(0, rotateHeight + (this.flipY ? this.rotatingPointOffset : -this.rotatingPointOffset));
ctx.closePath();
ctx.stroke();
}
ctx.restore();
return this;
},
_renderDashedStroke: function(ctx) {
if (1 & this.strokeDashArray.length /* if odd number of items */) {
/* duplicate items */
this.strokeDashArray.push.apply(this.strokeDashArray, this.strokeDashArray);
}
var i = 0,
x = -this.width/2, y = -this.height/2,
_this = this,
padding = this.padding,
dashedArrayLength = this.strokeDashArray.length;
ctx.save();
ctx.beginPath();
function renderSide(xMultiplier, yMultiplier) {
var lineLength = 0,
lengthDiff = 0,
sideLength = (yMultiplier ? _this.height : _this.width) + padding * 2;
while (lineLength < sideLength) {
var lengthOfSubPath = _this.strokeDashArray[i++];
lineLength += lengthOfSubPath;
if (lineLength > sideLength) {
lengthDiff = lineLength - sideLength;
}
// track coords
if (xMultiplier) {
x += (lengthOfSubPath * xMultiplier) - (lengthDiff * xMultiplier || 0);
}
else {
y += (lengthOfSubPath * yMultiplier) - (lengthDiff * yMultiplier || 0);
}
ctx[1 & i /* odd */ ? 'moveTo' : 'lineTo'](x, y);
if (i >= dashedArrayLength) {
i = 0;
}
}
}
renderSide(1, 0);
renderSide(0, 1);
renderSide(-1, 0);
renderSide(0, -1);
ctx.stroke();
ctx.closePath();
ctx.restore();
},
/**
* Draws corners of an object's bounding box.
* Requires public properties: width, height, scaleX, scaleY
* Requires public options: cornersize, padding
* @method drawCorners
* @param {CanvasRenderingContext2D} ctx Context to draw on
* @return {fabric.Object} thisArg
* @chainable
*/
drawCorners: function(ctx) {
if (!this.hasControls) return;
var size = this.cornersize,
size2 = size / 2,
strokeWidth2 = this.strokeWidth / 2,
left = -(this.width / 2),
top = -(this.height / 2),
_left,
_top,
sizeX = size / this.scaleX,
sizeY = size / this.scaleY,
paddingX = this.padding / this.scaleX,
paddingY = this.padding / this.scaleY,
scaleOffsetY = size2 / this.scaleY,
scaleOffsetX = size2 / this.scaleX,
scaleOffsetSizeX = (size2 - size) / this.scaleX,
scaleOffsetSizeY = (size2 - size) / this.scaleY,
height = this.height,
width = this.width,
methodName = this.transparentCorners ? 'strokeRect' : 'fillRect';
ctx.save();
ctx.lineWidth = 1 / Math.max(this.scaleX, this.scaleY);
ctx.globalAlpha = this.isMoving ? this.borderOpacityWhenMoving : 1;
ctx.strokeStyle = ctx.fillStyle = this.cornerColor;
// top-left
_left = left - scaleOffsetX - strokeWidth2 - paddingX;
_top = top - scaleOffsetY - strokeWidth2 - paddingY;
ctx.clearRect(_left, _top, sizeX, sizeY);
ctx[methodName](_left, _top, sizeX, sizeY);
// top-right
_left = left + width - scaleOffsetX + strokeWidth2 + paddingX;
_top = top - scaleOffsetY - strokeWidth2 - paddingY;
ctx.clearRect(_left, _top, sizeX, sizeY);
ctx[methodName](_left, _top, sizeX, sizeY);
// bottom-left
_left = left - scaleOffsetX - strokeWidth2 - paddingX;
_top = top + height + scaleOffsetSizeY + strokeWidth2 + paddingY;
ctx.clearRect(_left, _top, sizeX, sizeY);
ctx[methodName](_left, _top, sizeX, sizeY);
// bottom-right
_left = left + width + scaleOffsetSizeX + strokeWidth2 + paddingX;
_top = top + height + scaleOffsetSizeY + strokeWidth2 + paddingY;
ctx.clearRect(_left, _top, sizeX, sizeY);
ctx[methodName](_left, _top, sizeX, sizeY);
if (!this.lockUniScaling) {
// middle-top
_left = left + width/2 - scaleOffsetX;
_top = top - scaleOffsetY - strokeWidth2 - paddingY;
ctx.clearRect(_left, _top, sizeX, sizeY);
ctx[methodName](_left, _top, sizeX, sizeY);
// middle-bottom
_left = left + width/2 - scaleOffsetX;
_top = top + height + scaleOffsetSizeY + strokeWidth2 + paddingY;
ctx.clearRect(_left, _top, sizeX, sizeY);
ctx[methodName](_left, _top, sizeX, sizeY);
// middle-right
_left = left + width + scaleOffsetSizeX + strokeWidth2 + paddingX;
_top = top + height/2 - scaleOffsetY;
ctx.clearRect(_left, _top, sizeX, sizeY);
ctx[methodName](_left, _top, sizeX, sizeY);
// middle-left
_left = left - scaleOffsetX - strokeWidth2 - paddingX;
_top = top + height/2 - scaleOffsetY;
ctx.clearRect(_left, _top, sizeX, sizeY);
ctx[methodName](_left, _top, sizeX, sizeY);
}
// middle-top-rotate
if (this.hasRotatingPoint) {
_left = left + width/2 - scaleOffsetX;
_top = this.flipY ?
(top + height + (this.rotatingPointOffset / this.scaleY) - sizeY/2 + strokeWidth2 + paddingY)
: (top - (this.rotatingPointOffset / this.scaleY) - sizeY/2 - strokeWidth2 - paddingY);
ctx.clearRect(_left, _top, sizeX, sizeY);
ctx[methodName](_left, _top, sizeX, sizeY);
}
ctx.restore();
return this;
},
/**
* Clones an instance
* @method clone
* @param {Object} options object
* @return {fabric.Object} clone of an instance
*/
clone: function(options) {
if (this.constructor.fromObject) {
return this.constructor.fromObject(this.toObject(), options);
}
return new fabric.Object(this.toObject());
},
/**
* Creates an instance of fabric.Image out of an object
* @method cloneAsImage
* @param callback {Function} callback, invoked with an instance as a first argument
* @return {fabric.Object} thisArg
* @chainable
*/
cloneAsImage: function(callback) {
if (fabric.Image) {
var i = new Image();
/** @ignore */
i.onload = function() {
if (callback) {
callback(new fabric.Image(i), orig);
}
i = i.onload = null;
};
var orig = {
angle: this.get('angle'),
flipX: this.get('flipX'),
flipY: this.get('flipY')
};
// normalize angle
this.set('angle', 0).set('flipX', false).set('flipY', false);
this.toDataURL(function(dataURL) {
i.src = dataURL;
});
}
return this;
},
/**
* Converts an object into a data-url-like string
* @method toDataURL
* @return {String} string of data
*/
toDataURL: function(callback) {
var el = fabric.document.createElement('canvas');
if (!el.getContext && typeof G_vmlCanvasManager !== 'undefined') {
G_vmlCanvasManager.initElement(el);
}
el.width = this.getBoundingRectWidth();
el.height = this.getBoundingRectHeight();
fabric.util.wrapElement(el, 'div');
var canvas = new fabric.Canvas(el);
canvas.backgroundColor = 'transparent';
canvas.renderAll();
if (this.constructor.async) {
this.clone(proceed);
}
else {
proceed(this.clone());
}
function proceed(clone) {
clone.left = el.width / 2;
clone.top = el.height / 2;
clone.setActive(false);
canvas.add(clone);
var data = canvas.toDataURL('png');
canvas.dispose();
canvas = clone = null;
callback && callback(data);
}
},
/**
* @method hasStateChanged
* @return {Boolean} true if instance' state has changed
*/
hasStateChanged: function() {
return this.stateProperties.some(function(prop) {
return this[prop] !== this.originalState[prop];
}, this);
},
/**
* @method saveState
* @return {fabric.Object} thisArg
* @chainable
*/
saveState: function() {
this.stateProperties.forEach(function(prop) {
this.originalState[prop] = this.get(prop);
}, this);
return this;
},
/**
* @method setupState
*/
setupState: function() {
this.originalState = { };
this.saveState();
},
/**
* Returns true if object intersects with an area formed by 2 points
* @method intersectsWithRect
* @param {Object} selectionTL
* @param {Object} selectionBR
* @return {Boolean}
*/
intersectsWithRect: function(selectionTL, selectionBR) {
var oCoords = this.oCoords,
tl = new fabric.Point(oCoords.tl.x, oCoords.tl.y),
tr = new fabric.Point(oCoords.tr.x, oCoords.tr.y),
bl = new fabric.Point(oCoords.bl.x, oCoords.bl.y),
br = new fabric.Point(oCoords.br.x, oCoords.br.y);
var intersection = fabric.Intersection.intersectPolygonRectangle(
[tl, tr, br, bl],
selectionTL,
selectionBR
);
return (intersection.status === 'Intersection');
},
/**
* Returns true if object intersects with another object
* @method intersectsWithObject
* @param {Object} other Object to test
* @return {Boolean}
*/
intersectsWithObject: function(other) {
// extracts coords
function getCoords(oCoords) {
return {
tl: new fabric.Point(oCoords.tl.x, oCoords.tl.y),
tr: new fabric.Point(oCoords.tr.x, oCoords.tr.y),
bl: new fabric.Point(oCoords.bl.x, oCoords.bl.y),
br: new fabric.Point(oCoords.br.x, oCoords.br.y)
};
}
var thisCoords = getCoords(this.oCoords),
otherCoords = getCoords(other.oCoords);
var intersection = fabric.Intersection.intersectPolygonPolygon(
[thisCoords.tl, thisCoords.tr, thisCoords.br, thisCoords.bl],
[otherCoords.tl, otherCoords.tr, otherCoords.br, otherCoords.bl]
);
return (intersection.status === 'Intersection');
},
/**
* Returns true if object is fully contained within area of another object
* @method isContainedWithinObject
* @param {Object} other Object to test
* @return {Boolean}
*/
isContainedWithinObject: function(other) {
return this.isContainedWithinRect(other.oCoords.tl, other.oCoords.br);
},
/**
* Returns true if object is fully contained within area formed by 2 points
* @method isContainedWithinRect
* @param {Object} selectionTL
* @param {Object} selectionBR
* @return {Boolean}
*/
isContainedWithinRect: function(selectionTL, selectionBR) {
var oCoords = this.oCoords,
tl = new fabric.Point(oCoords.tl.x, oCoords.tl.y),
tr = new fabric.Point(oCoords.tr.x, oCoords.tr.y),
bl = new fabric.Point(oCoords.bl.x, oCoords.bl.y);
return tl.x > selectionTL.x
&& tr.x < selectionBR.x
&& tl.y > selectionTL.y
&& bl.y < selectionBR.y;
},
/**
* @method isType
* @param type {String} type to check against
* @return {Boolean} true if specified type is identical to the type of instance
*/
isType: function(type) {
return this.type === type;
},
/**
* Determines which one of the four corners has been clicked
* @method _findTargetCorner
* @private
* @param e {Event} event object
* @param offset {Object} canvas offset
* @return {String|Boolean} corner code (tl, tr, bl, br, etc.), or false if nothing is found
*/
_findTargetCorner: function(e, offset) {
if (!this.hasControls || !this.active) return false;
var pointer = getPointer(e),
ex = pointer.x - offset.left,
ey = pointer.y - offset.top,
xpoints,
lines;
for (var i in this.oCoords) {
if (i === 'mtr' && !this.hasRotatingPoint) {
continue;
}
if (this.lockUniScaling && (i === 'mt' || i === 'mr' || i === 'mb' || i === 'ml')) {
continue;
}
lines = this._getImageLines(this.oCoords[i].corner, i);
// 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(ex, ey, lines);
if (xpoints % 2 === 1 && xpoints !== 0) {
this.__corner = i;
return i;
}
}
return false;
},
/**
* Helper method to determine how many cross points are between the 4 image edges
* and the horizontal line determined by the position of our mouse when clicked on canvas
* @method _findCrossPoints
* @private
* @param ex {Number} x coordinate of the mouse
* @param ey {Number} y coordinate of the mouse
* @param oCoords {Object} Coordinates of the image being evaluated
*/
_findCrossPoints: function(ex, ey, oCoords) {
var b1, b2, a1, a2, xi, yi,
xcount = 0,
iLine;
for (var lineKey in oCoords) {
iLine = oCoords[lineKey];
// optimisation 1: line below dot. no cross
if ((iLine.o.y < ey) && (iLine.d.y < ey)) {
continue;
}
// optimisation 2: line above dot. no cross
if ((iLine.o.y >= ey) && (iLine.d.y >= ey)) {
continue;
}
// optimisation 3: vertical line case
if ((iLine.o.x === iLine.d.x) && (iLine.o.x >= ex)) {
xi = iLine.o.x;
yi = ey;
}
// calculate the intersection point
else {
b1 = 0;
b2 = (iLine.d.y-iLine.o.y)/(iLine.d.x-iLine.o.x);
a1 = ey-b1*ex;
a2 = iLine.o.y-b2*iLine.o.x;
xi = - (a1-a2)/(b1-b2);
yi = a1+b1*xi;
}
// dont count xi < ex cases
if (xi >= ex) {
xcount += 1;
}
// optimisation 4: specific for square images
if (xcount === 2) {
break;
}
}
return xcount;
},
/**
* Method that returns an object with the image lines in it given the coordinates of the corners
* @method _getImageLines
* @private
* @param oCoords {Object} coordinates of the image 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
}
};
},
/**
* Sets the coordinates of the draggable boxes in the corners of
* the image used to scale/rotate it.
* @method _setCornerCoords
* @private
*/
_setCornerCoords: function() {
var coords = this.oCoords,
theta = degreesToRadians(45 - this.getAngle()),
cornerHypotenuse = Math.sqrt(2 * Math.pow(this.cornersize, 2)) / 2,
cosHalfOffset = cornerHypotenuse * Math.cos(theta),
sinHalfOffset = cornerHypotenuse * Math.sin(theta),
sinTh = Math.sin(this._theta),
cosTh = Math.cos(this._theta);
coords.tl.corner = {
tl: {
x: coords.tl.x - sinHalfOffset,
y: coords.tl.y - cosHalfOffset
},
tr: {
x: coords.tl.x + cosHalfOffset,
y: coords.tl.y - sinHalfOffset
},
bl: {
x: coords.tl.x - cosHalfOffset,
y: coords.tl.y + sinHalfOffset
},
br: {
x: coords.tl.x + sinHalfOffset,
y: coords.tl.y + cosHalfOffset
}
};
coords.tr.corner = {
tl: {
x: coords.tr.x - sinHalfOffset,
y: coords.tr.y - cosHalfOffset
},
tr: {
x: coords.tr.x + cosHalfOffset,
y: coords.tr.y - sinHalfOffset
},
br: {
x: coords.tr.x + sinHalfOffset,
y: coords.tr.y + cosHalfOffset
},
bl: {
x: coords.tr.x - cosHalfOffset,
y: coords.tr.y + sinHalfOffset
}
};
coords.bl.corner = {
tl: {
x: coords.bl.x - sinHalfOffset,
y: coords.bl.y - cosHalfOffset
},
bl: {
x: coords.bl.x - cosHalfOffset,
y: coords.bl.y + sinHalfOffset
},
br: {
x: coords.bl.x + sinHalfOffset,
y: coords.bl.y + cosHalfOffset
},
tr: {
x: coords.bl.x + cosHalfOffset,
y: coords.bl.y - sinHalfOffset
}
};
coords.br.corner = {
tr: {
x: coords.br.x + cosHalfOffset,
y: coords.br.y - sinHalfOffset
},
bl: {
x: coords.br.x - cosHalfOffset,
y: coords.br.y + sinHalfOffset
},
br: {
x: coords.br.x + sinHalfOffset,
y: coords.br.y + cosHalfOffset
},
tl: {
x: coords.br.x - sinHalfOffset,
y: coords.br.y - cosHalfOffset
}
};
coords.ml.corner = {
tl: {
x: coords.ml.x - sinHalfOffset,
y: coords.ml.y - cosHalfOffset
},
tr: {
x: coords.ml.x + cosHalfOffset,
y: coords.ml.y - sinHalfOffset
},
bl: {
x: coords.ml.x - cosHalfOffset,
y: coords.ml.y + sinHalfOffset
},
br: {
x: coords.ml.x + sinHalfOffset,
y: coords.ml.y + cosHalfOffset
}
};
coords.mt.corner = {
tl: {
x: coords.mt.x - sinHalfOffset,
y: coords.mt.y - cosHalfOffset
},
tr: {
x: coords.mt.x + cosHalfOffset,
y: coords.mt.y - sinHalfOffset
},
bl: {
x: coords.mt.x - cosHalfOffset,
y: coords.mt.y + sinHalfOffset
},
br: {
x: coords.mt.x + sinHalfOffset,
y: coords.mt.y + cosHalfOffset
}
};
coords.mr.corner = {
tl: {
x: coords.mr.x - sinHalfOffset,
y: coords.mr.y - cosHalfOffset
},
tr: {
x: coords.mr.x + cosHalfOffset,
y: coords.mr.y - sinHalfOffset
},
bl: {
x: coords.mr.x - cosHalfOffset,
y: coords.mr.y + sinHalfOffset
},
br: {
x: coords.mr.x + sinHalfOffset,
y: coords.mr.y + cosHalfOffset
}
};
coords.mb.corner = {
tl: {
x: coords.mb.x - sinHalfOffset,
y: coords.mb.y - cosHalfOffset
},
tr: {
x: coords.mb.x + cosHalfOffset,
y: coords.mb.y - sinHalfOffset
},
bl: {
x: coords.mb.x - cosHalfOffset,
y: coords.mb.y + sinHalfOffset
},
br: {
x: coords.mb.x + sinHalfOffset,
y: coords.mb.y + cosHalfOffset
}
};
coords.mtr.corner = {
tl: {
x: coords.mtr.x - sinHalfOffset + (sinTh * this.rotatingPointOffset),
y: coords.mtr.y - cosHalfOffset - (cosTh * this.rotatingPointOffset)
},
tr: {
x: coords.mtr.x + cosHalfOffset + (sinTh * this.rotatingPointOffset),
y: coords.mtr.y - sinHalfOffset - (cosTh * this.rotatingPointOffset)
},
bl: {
x: coords.mtr.x - cosHalfOffset + (sinTh * this.rotatingPointOffset),
y: coords.mtr.y + sinHalfOffset - (cosTh * this.rotatingPointOffset)
},
br: {
x: coords.mtr.x + sinHalfOffset + (sinTh * this.rotatingPointOffset),
y: coords.mtr.y + cosHalfOffset - (cosTh * this.rotatingPointOffset)
}
};
},
/**
* Makes object's color grayscale
* @method toGrayscale
* @return {fabric.Object} thisArg
*/
toGrayscale: function() {
var fillValue = this.get('fill');
if (fillValue) {
this.set('overlayFill', new fabric.Color(fillValue).toGrayscale().toRgb());
}
return this;
},
/**
* @method complexity
* @return {Number}
*/
complexity: function() {
return 0;
},
/**
* Returns a JSON representation of an instance
* @method toJSON
* @return {String} json
*/
toJSON: function() {
// delegate, not alias
return this.toObject();
},
/**
* @method setGradientFill
*/
setGradientFill: function(options) {
this.set('fill', fabric.Gradient.forObject(this, options));
},
/**
* @method animate
*
* 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') {
for (var prop in arguments[0]) {
this._animate(prop, arguments[0][prop], arguments[1]);
}
}
else {
this._animate.apply(this, arguments);
}
return this;
},
/**
* @private
* @method _animate
*/
_animate: function(property, to, options) {
var obj = this;
options || (options = { });
if (!('from' in options)) {
options.from = this.get(property);
}
if (/[+\-]/.test((to + '').charAt(0))) {
to = this.get(property) + parseFloat(to);
}
fabric.util.animate({
startValue: options.from,
endValue: to,
byValue: options.by,
easing: options.easing,
duration: options.duration,
onChange: function(value) {
obj.set(property, value);
options.onChange && options.onChange();
},
onComplete: function() {
obj.setCoords();
options.onComplete && options.onComplete();
}
});
},
/**
* Centers object horizontally on canvas to which it was added last
* @method centerH
* @return {fabric.Object} thisArg
*/
centerH: function () {
this.canvas.centerObjectH(this);
return this;
},
/**
* Centers object vertically on canvas to which it was added last
* @method centerV
* @return {fabric.Object} thisArg
* @chainable
*/
centerV: function () {
this.canvas.centerObjectV(this);
return this;
},
/**
* Centers object vertically and horizontally on canvas to which is was added last
* @method center
* @return {fabric.Object} thisArg
* @chainable
*/
center: function () {
return this.centerH().centerV();
},
/**
* Removes object from canvas to which it was added last
* @method remove
* @return {fabric.Object} thisArg
* @chainable
*/
remove: function() {
return this.canvas.remove(this);
},
/**
* Moves an object to the bottom of the stack of drawn objects
* @method sendToBack
* @return {fabric.Object} thisArg
* @chainable
*/
sendToBack: function() {
this.canvas.sendToBack(this);
return this;
},
/**
* Moves an object to the top of the stack of drawn objects
* @method bringToFront
* @return {fabric.Object} thisArg
* @chainable
*/
bringToFront: function() {
this.canvas.bringToFront(this);
return this;
},
/**
* Moves an object one level down in stack of drawn objects
* @method sendBackwards
* @return {fabric.Object} thisArg
* @chainable
*/
sendBackwards: function() {
this.canvas.sendBackwards(this);
return this;
},
/**
* Moves an object one level up in stack of drawn objects
* @method bringForward
* @return {fabric.Object} thisArg
* @chainable
*/
bringForward: function() {
this.canvas.bringForward(this);
return this;
}
});
/**
* @alias rotate -> setAngle
*/
fabric.Object.prototype.rotate = fabric.Object.prototype.setAngle;
var proto = fabric.Object.prototype;
for (var i = proto.stateProperties.length; i--; ) {
var propName = proto.stateProperties[i],
capitalizedPropName = propName.charAt(0).toUpperCase() + propName.slice(1),
setterName = 'set' + capitalizedPropName,
getterName = 'get' + capitalizedPropName;
// using `new Function` for better introspection
if (!proto[getterName]) {
proto[getterName] = (function(property) {
return new Function('return this.get("' + property + '")');
})(propName);
}
if (!proto[setterName]) {
proto[setterName] = (function(property) {
return new Function('value', 'return this.set("' + property + '", value)');
})(propName);
}
}
extend(fabric.Object.prototype, fabric.Observable);
extend(fabric.Object, {
/**
* @static
* @constant
* @type Number
*/
NUM_FRACTION_DIGITS: 2,
/**
* @static
* @constant
* @type Number
*/
MIN_SCALE_LIMIT: 0.1
});
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
"use strict";
var fabric = global.fabric || (global.fabric = { }),
extend = fabric.util.object.extend,
coordProps = { 'x1': 1, 'x2': 1, 'y1': 1, 'y2': 1 };
if (fabric.Line) {
fabric.warn('fabric.Line is already defined');
return;
}
/**
* @class Line
* @extends fabric.Object
*/
fabric.Line = fabric.util.createClass(fabric.Object, /** @scope fabric.Line.prototype */ {
/**
* @property
* @type String
*/
type: 'line',
/**
* Constructor
* @method initialize
* @param {Array} points Array of points
* @param {Object} [options] Options object
* @return {fabric.Line} thisArg
*/
initialize: function(points, options) {
options = 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
* @method _setWidthHeight
* @param {Object} options
*/
_setWidthHeight: function(options) {
options || (options = { });
this.set('width', (this.x2 - this.x1) || 1);
this.set('height', (this.y2 - this.y1) || 1);
this.set('left', 'left' in options ? options.left : (this.x1 + this.width / 2));
this.set('top', 'top' in options ? options.top : (this.y1 + this.height / 2));
},
/**
* @private
* @method _set
* @param {String} key
* @param {Any} value
*/
_set: function(key, value) {
this[key] = value;
if (key in coordProps) {
this._setWidthHeight();
}
return this;
},
/**
* @private
* @method _render
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_render: function(ctx) {
ctx.beginPath();
if (this.group) {
ctx.translate(-this.group.width/2 + this.left, -this.group.height / 2 + this.top);
}
// move from center (of virtual box) to its left/top corner
ctx.moveTo(this.width === 1 ? 0 : (-this.width / 2), this.height === 1 ? 0 : (-this.height / 2));
ctx.lineTo(this.width === 1 ? 0 : (this.width / 2), this.height === 1 ? 0 : (this.height / 2));
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 = ctx.fillStyle;
ctx.stroke();
ctx.strokeStyle = origStrokeStyle;
},
/**
* Returns complexity of an instance
* @method complexity
* @return {Number} complexity
*/
complexity: function() {
return 1;
},
/**
* Returns object representation of an instance
* @methd toObject
* @return {Object}
*/
toObject: function() {
return extend(this.callSuper('toObject'), {
x1: this.get('x1'),
y1: this.get('y1'),
x2: this.get('x2'),
y2: this.get('y2')
});
},
/**
* Returns svg representation of an instance
* @method toSVG
* @return {string} svg representation of an instance
*/
toSVG: function() {
return [
''
].join('');
}
});
/**
* List of attribute names to account for when parsing SVG element (used by `fabric.Line.fromElement`)
* @static
* @see http://www.w3.org/TR/SVG/shapes.html#LineElement
*/
fabric.Line.ATTRIBUTE_NAMES = 'x1 y1 x2 y2 stroke stroke-width transform'.split(' ');
/**
* Returns fabric.Line instance from an SVG element
* @static
* @method fabric.Line.fromElement
* @param {SVGElement} element Element to parse
* @param {Object} [options] Options object
* @return {fabric.Line} instance of fabric.Line
*/
fabric.Line.fromElement = function(element, options) {
var parsedAttributes = fabric.parseAttributes(element, fabric.Line.ATTRIBUTE_NAMES);
var points = [
parsedAttributes.x1 || 0,
parsedAttributes.y1 || 0,
parsedAttributes.x2 || 0,
parsedAttributes.y2 || 0
];
return new fabric.Line(points, extend(parsedAttributes, options));
};
/**
* Returns fabric.Line instance from an object representation
* @static
* @method fabric.Line.fromObject
* @param {Object} object Object to create an instance from
* @return {fabric.Line} instance of fabric.Line
*/
fabric.Line.fromObject = function(object) {
var points = [object.x1, object.y1, object.x2, object.y2];
return new fabric.Line(points, object);
};
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
"use strict";
var fabric = global.fabric || (global.fabric = { }),
piBy2 = Math.PI * 2,
extend = fabric.util.object.extend;
if (fabric.Circle) {
fabric.warn('fabric.Circle is already defined.');
return;
}
/**
* @class Circle
* @extends fabric.Object
*/
fabric.Circle = fabric.util.createClass(fabric.Object, /** @scope fabric.Circle.prototype */ {
/**
* @property
* @type String
*/
type: 'circle',
/**
* Constructor
* @method initialize
* @param {Object} [options] Options object
* @return {fabric.Circle} thisArg
*/
initialize: function(options) {
options = options || { };
this.set('radius', options.radius || 0);
this.callSuper('initialize', options);
var diameter = this.get('radius') * 2;
this.set('width', diameter).set('height', diameter);
},
/**
* Returns object representation of an instance
* @method toObject
* @return {Object} object representation of an instance
*/
toObject: function() {
return extend(this.callSuper('toObject'), {
radius: this.get('radius')
});
},
/**
* Returns svg representation of an instance
* @method toSVG
* @return {string} svg representation of an instance
*/
toSVG: function() {
return ('');
},
/**
* @private
* @method _render
* @param ctx {CanvasRenderingContext2D} context to render on
*/
_render: function(ctx, noTransform) {
ctx.beginPath();
// multiply by currently set alpha (the one that was set by path group where this object is contained, for example)
ctx.globalAlpha = this.group ? (ctx.globalAlpha * this.opacity) : this.opacity;
ctx.arc(noTransform ? this.left : 0, noTransform ? this.top : 0, this.radius, 0, piBy2, false);
ctx.closePath();
if (this.fill) {
ctx.fill();
}
if (this.stroke) {
ctx.stroke();
}
},
/**
* Returns horizontal radius of an object (according to how an object is scaled)
* @method getRadiusX
* @return {Number}
*/
getRadiusX: function() {
return this.get('radius') * this.get('scaleX');
},
/**
* Returns vertical radius of an object (according to how an object is scaled)
* @method getRadiusY
* @return {Number}
*/
getRadiusY: function() {
return this.get('radius') * this.get('scaleY');
},
/**
* Sets radius of an object (and updates width accordingly)
* @method setRadius
* @return {Number}
*/
setRadius: function(value) {
this.radius = value;
this.set('width', value * 2).set('height', value * 2);
},
/**
* Returns complexity of an instance
* @method complexity
* @return {Number} complexity of this instance
*/
complexity: function() {
return 1;
}
});
/**
* List of attribute names to account for when parsing SVG element (used by {@link fabric.Circle.fromElement})
* @static
* @see: http://www.w3.org/TR/SVG/shapes.html#CircleElement
*/
fabric.Circle.ATTRIBUTE_NAMES = 'cx cy r fill fill-opacity opacity stroke stroke-width transform'.split(' ');
/**
* Returns {@link fabric.Circle} instance from an SVG element
* @static
* @method fabric.Circle.fromElement
* @param element {SVGElement} element to parse
* @param options {Object} options object
* @throws {Error} If value of `r` attribute is missing or invalid
* @return {Object} instance of fabric.Circle
*/
fabric.Circle.fromElement = function(element, options) {
options || (options = { });
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');
}
if ('left' in parsedAttributes) {
parsedAttributes.left -= (options.width / 2) || 0;
}
if ('top' in parsedAttributes) {
parsedAttributes.top -= (options.height / 2) || 0;
}
return new fabric.Circle(extend(parsedAttributes, options));
};
/**
* @private
*/
function isValidRadius(attributes) {
return (('radius' in attributes) && (attributes.radius > 0));
}
/**
* Returns {@link fabric.Circle} instance from an object representation
* @static
* @method fabric.Circle.fromObject
* @param {Object} object Object to create an instance from
* @return {Object} Instance of fabric.Circle
*/
fabric.Circle.fromObject = function(object) {
return new fabric.Circle(object);
};
})(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;
}
/**
* @class Triangle
* @extends fabric.Object
*/
fabric.Triangle = fabric.util.createClass(fabric.Object, /** @scope fabric.Triangle.prototype */ {
/**
* @property
* @type String
*/
type: 'triangle',
/**
* Constructor
* @method initialize
* @param options {Object} options object
* @return {Object} thisArg
*/
initialize: function(options) {
options = options || { };
this.callSuper('initialize', options);
this.set('width', options.width || 100)
.set('height', options.height || 100);
},
/**
* @private
* @method _render
* @param ctx {CanvasRenderingContext2D} 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();
if (this.fill) {
ctx.fill();
}
if (this.stroke) {
ctx.stroke();
}
},
/**
* Returns complexity of an instance
* @method complexity
* @return {Number} complexity of this instance
*/
complexity: function() {
return 1;
},
/**
* Returns svg representation of an instance
* @method toSVG
* @return {string} svg representation of an instance
*/
toSVG: function() {
var widthBy2 = this.width / 2,
heightBy2 = this.height / 2;
var points = [
-widthBy2 + " " + heightBy2,
"0 " + -heightBy2,
widthBy2 + " " + heightBy2
].join(",");
return '';
}
});
/**
* Returns fabric.Triangle instance from an object representation
* @static
* @method Canvas.Trangle.fromObject
* @param object {Object} object to create an instance from
* @return {Object} instance of Canvas.Triangle
*/
fabric.Triangle.fromObject = function(object) {
return new fabric.Triangle(object);
};
})(typeof exports !== 'undefined' ? exports : this);
(function(global){
"use strict";
var fabric = global.fabric || (global.fabric = { }),
piBy2 = Math.PI * 2,
extend = fabric.util.object.extend;
if (fabric.Ellipse) {
fabric.warn('fabric.Ellipse is already defined.');
return;
}
/**
* @class Ellipse
* @extends fabric.Object
*/
fabric.Ellipse = fabric.util.createClass(fabric.Object, /** @scope fabric.Ellipse.prototype */ {
/**
* @property
* @type String
*/
type: 'ellipse',
/**
* Constructor
* @method initialize
* @param {Object} [options] Options object
* @return {Object} thisArg
*/
initialize: function(options) {
options = options || { };
this.callSuper('initialize', options);
this.set('rx', options.rx || 0);
this.set('ry', options.ry || 0);
this.set('width', this.get('rx') * 2);
this.set('height', this.get('ry') * 2);
},
/**
* Returns object representation of an instance
* @method toObject
* @return {Object} object representation of an instance
*/
toObject: function() {
return extend(this.callSuper('toObject'), {
rx: this.get('rx'),
ry: this.get('ry')
});
},
/**
* Returns svg representation of an instance
* @method toSVG
* @return {string} svg representation of an instance
*/
toSVG: function() {
return [
''
].join('');
},
/**
* Renders this instance on a given context
* @method render
* @param ctx {CanvasRenderingContext2D} context to render on
* @param noTransform {Boolean} context is not transformed when set to true
*/
render: function(ctx, noTransform) {
// do not use `get` for perf. reasons
if (this.rx === 0 || this.ry === 0) return;
return this.callSuper('render', ctx, noTransform);
},
/**
* @private
* @method _render
* @param ctx {CanvasRenderingContext2D} context to render on
*/
_render: function(ctx, noTransform) {
ctx.beginPath();
ctx.save();
ctx.globalAlpha = this.group ? (ctx.globalAlpha * this.opacity) : this.opacity;
if (this.transformMatrix && this.group) {
ctx.translate(this.cx, this.cy);
}
ctx.transform(1, 0, 0, this.ry/this.rx, 0, 0);
ctx.arc(noTransform ? this.left : 0, noTransform ? this.top : 0, this.rx, 0, piBy2, false);
if (this.stroke) {
ctx.stroke();
}
if (this.fill) {
ctx.fill();
}
ctx.restore();
},
/**
* Returns complexity of an instance
* @method complexity
* @return {Number} complexity
*/
complexity: function() {
return 1;
}
});
/**
* List of attribute names to account for when parsing SVG element (used by {@link fabric.Ellipse.fromElement})
* @static
* @see http://www.w3.org/TR/SVG/shapes.html#EllipseElement
*/
fabric.Ellipse.ATTRIBUTE_NAMES = 'cx cy rx ry fill fill-opacity opacity stroke stroke-width transform'.split(' ');
/**
* Returns {@link fabric.Ellipse} instance from an SVG element
* @static
* @method fabric.Ellipse.fromElement
* @param {SVGElement} element Element to parse
* @param {Object} [options] Options object
* @return {fabric.Ellipse}
*/
fabric.Ellipse.fromElement = function(element, options) {
options || (options = { });
var parsedAttributes = fabric.parseAttributes(element, fabric.Ellipse.ATTRIBUTE_NAMES);
var cx = parsedAttributes.left;
var cy = parsedAttributes.top;
if ('left' in parsedAttributes) {
parsedAttributes.left -= (options.width / 2) || 0;
}
if ('top' in parsedAttributes) {
parsedAttributes.top -= (options.height / 2) || 0;
}
var ellipse = new fabric.Ellipse(extend(parsedAttributes, options));
ellipse.cx = cx || 0;
ellipse.cy = cy || 0;
return ellipse;
};
/**
* Returns fabric.Ellipse instance from an object representation
* @static
* @method fabric.Ellipse.fromObject
* @param {Object} object Object to create an instance from
* @return {fabric.Ellipse}
*/
fabric.Ellipse.fromObject = function(object) {
return new fabric.Ellipse(object);
};
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
"use strict";
var fabric = global.fabric || (global.fabric = { });
if (fabric.Rect) {
console.warn('fabric.Rect is already defined');
return;
}
/**
* @class Rect
* @extends fabric.Object
*/
fabric.Rect = fabric.util.createClass(fabric.Object, /** @scope fabric.Rect.prototype */ {
/**
* Type of the instance
* @property
* @type String
*/
type: 'rect',
/**
* Horizontal border radius
* @property
* @type Number
*/
rx: 0,
/**
* Vertical border radius
* @property
* @type Number
*/
ry: 0,
/**
* Constructor
* @method initialize
* @param options {Object} options object
* @return {Object} thisArg
*/
initialize: function(options) {
options = options || { };
this._initStateProperties();
this.callSuper('initialize', options);
this._initRxRy();
},
/**
* Creates `stateProperties` list on an instance, and adds `fabric.Rect` -specific ones to it
* (such as "rx", "ry", etc.)
* @private
* @method _initStateProperties
*/
_initStateProperties: function() {
this.stateProperties = this.stateProperties.concat(['rx', 'ry']);
},
/**
* @private
* @method _initRxRy
*/
_initRxRy: function() {
if (this.rx && !this.ry) {
this.ry = this.rx;
}
else if (this.ry && !this.rx) {
this.rx = this.ry;
}
},
/**
* @private
* @method _render
* @param ctx {CanvasRenderingContext2D} context to render on
*/
_render: function(ctx) {
var rx = this.rx || 0,
ry = this.ry || 0,
x = -this.width / 2,
y = -this.height / 2,
w = this.width,
h = this.height;
ctx.beginPath();
ctx.globalAlpha = this.group ? (ctx.globalAlpha * this.opacity) : this.opacity;
if (this.transformMatrix && this.group) {
ctx.translate(
this.width / 2 + this.x,
this.height / 2 + this.y);
}
if (!this.transformMatrix && this.group) {
ctx.translate(
-this.group.width / 2 + this.width / 2 + this.x,
-this.group.height / 2 + this.height / 2 + this.y);
}
ctx.moveTo(x+rx, y);
ctx.lineTo(x+w-rx, y);
ctx.quadraticCurveTo(x+w, y, x+w, y+ry, x+w, y+ry);
ctx.lineTo(x+w, y+h-ry);
ctx.quadraticCurveTo(x+w,y+h,x+w-rx,y+h,x+w-rx,y+h);
ctx.lineTo(x+rx,y+h);
ctx.quadraticCurveTo(x,y+h,x,y+h-ry,x,y+h-ry);
ctx.lineTo(x,y+ry);
ctx.quadraticCurveTo(x,y,x+rx,y,x+rx,y);
ctx.closePath();
if (this.fill) {
ctx.fill();
}
if (this.strokeDashArray) {
this._renderDashedStroke(ctx);
}
else if (this.stroke) {
ctx.stroke();
}
},
/**
* @method _normalizeLeftTopProperties
* @private
* Since coordinate system differs from that of SVG
*/
_normalizeLeftTopProperties: function(parsedAttributes) {
if (parsedAttributes.left) {
this.set('left', parsedAttributes.left + this.getWidth() / 2);
}
this.set('x', parsedAttributes.left || 0);
if (parsedAttributes.top) {
this.set('top', parsedAttributes.top + this.getHeight() / 2);
}
this.set('y', parsedAttributes.top || 0);
return this;
},
/**
* Returns complexity of an instance
* @method complexity
* @return {Number} complexity
*/
complexity: function() {
return 1;
},
/**
* Returns object representation of an instance
* @method toObject
* @return {Object} object representation of an instance
*/
toObject: function() {
return fabric.util.object.extend(this.callSuper('toObject'), {
rx: this.get('rx') || 0,
ry: this.get('ry') || 0
});
},
/**
* Returns svg representation of an instance
* @method toSVG
* @return {string} svg representation of an instance
*/
toSVG: function() {
return '';
}
});
// TODO (kangax): implement rounded rectangles (both parsing and rendering)
/**
* List of attribute names to account for when parsing SVG element (used by `fabric.Rect.fromElement`)
* @static
*/
fabric.Rect.ATTRIBUTE_NAMES = 'x y width height rx ry fill fill-opacity opacity stroke stroke-width transform'.split(' ');
/**
* @private
*/
function _setDefaultLeftTopValues(attributes) {
attributes.left = attributes.left || 0;
attributes.top = attributes.top || 0;
return attributes;
}
/**
* Returns fabric.Rect instance from an SVG element
* @static
* @method fabric.Rect.fromElement
* @param element {SVGElement} element to parse
* @param options {Object} options object
* @return {fabric.Rect} instance of fabric.Rect
*/
fabric.Rect.fromElement = function(element, options) {
if (!element) {
return null;
}
var parsedAttributes = fabric.parseAttributes(element, fabric.Rect.ATTRIBUTE_NAMES);
parsedAttributes = _setDefaultLeftTopValues(parsedAttributes);
var rect = new fabric.Rect(fabric.util.object.extend((options ? fabric.util.object.clone(options) : { }), parsedAttributes));
rect._normalizeLeftTopProperties(parsedAttributes);
return rect;
};
/**
* Returns fabric.Rect instance from an object representation
* @static
* @method fabric.Rect.fromObject
* @param object {Object} object to create an instance from
* @return {Object} instance of fabric.Rect
*/
fabric.Rect.fromObject = function(object) {
return new fabric.Rect(object);
};
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
"use strict";
var fabric = global.fabric || (global.fabric = { }),
toFixed = fabric.util.toFixed;
if (fabric.Polyline) {
fabric.warn('fabric.Polyline is already defined');
return;
}
/**
* @class Polyline
* @extends fabric.Object
*/
fabric.Polyline = fabric.util.createClass(fabric.Object, /** @scope fabric.Polyline.prototype */ {
/**
* @property
* @type String
*/
type: 'polyline',
/**
* Constructor
* @method initialize
* @param {Array} points array of points
* @param {Object} [options] Options object
* @return {Object} thisArg
*/
initialize: function(points, options) {
options = options || { };
this.set('points', points);
this.callSuper('initialize', options);
this._calcDimensions();
},
/**
* @private
* @method _calcDimensions
*/
_calcDimensions: function() {
return fabric.Polygon.prototype._calcDimensions.call(this);
},
/**
* Returns object representation of an instance
* @method toObject
* @return {Object} Object representation of an instance
*/
toObject: function() {
return fabric.Polygon.prototype.toObject.call(this);
},
/**
* Returns svg representation of an instance
* @method toSVG
* @return {string} svg representation of an instance
*/
toSVG: function() {
var points = [];
for (var i = 0, len = this.points.length; i < len; i++) {
points.push(toFixed(this.points[i].x, 2), ',', toFixed(this.points[i].y, 2), ' ');
}
return [
''
].join('');
},
/**
* @private
* @method _render
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_render: function(ctx) {
var point;
ctx.beginPath();
ctx.moveTo(this.points[0].x, this.points[0].y);
for (var i = 0, len = this.points.length; i < len; i++) {
point = this.points[i];
ctx.lineTo(point.x, point.y);
}
if (this.fill) {
ctx.fill();
}
if (this.stroke) {
ctx.stroke();
}
},
/**
* Returns complexity of an instance
* @method complexity
* @return {Number} complexity
*/
complexity: function() {
return this.get('points').length;
}
});
/**
* List of attribute names to account for when parsing SVG element (used by `fabric.Polyline.fromElement`)
* @static
* @see: http://www.w3.org/TR/SVG/shapes.html#PolylineElement
*/
fabric.Polyline.ATTRIBUTE_NAMES = 'fill fill-opacity opacity stroke stroke-width transform'.split(' ');
/**
* Returns fabric.Polyline instance from an SVG element
* @static
* @method fabric.Polyline.fromElement
* @param {SVGElement} element Element to parse
* @param {Object} [options] Options object
* @return {Object} instance of fabric.Polyline
*/
fabric.Polyline.fromElement = function(element, options) {
if (!element) {
return null;
}
options || (options = { });
var points = fabric.parsePointsAttribute(element.getAttribute('points')),
parsedAttributes = fabric.parseAttributes(element, fabric.Polyline.ATTRIBUTE_NAMES);
for (var i = 0, len = points.length; i < len; i++) {
// normalize coordinates, according to containing box (dimensions of which are passed via `options`)
points[i].x -= (options.width / 2) || 0;
points[i].y -= (options.height / 2) || 0;
}
return new fabric.Polyline(points, fabric.util.object.extend(parsedAttributes, options));
};
/**
* Returns fabric.Polyline instance from an object representation
* @static
* @method fabric.Polyline.fromObject
* @param {Object} [object] Object to create an instance from
* @return {fabric.Polyline}
*/
fabric.Polyline.fromObject = function(object) {
var points = object.points;
return new fabric.Polyline(points, object);
};
})(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.Polygon) {
fabric.warn('fabric.Polygon is already defined');
return;
}
/**
* @class Polygon
* @extends fabric.Object
*/
fabric.Polygon = fabric.util.createClass(fabric.Object, /** @scope fabric.Polygon.prototype */ {
/**
* @property
* @type String
*/
type: 'polygon',
/**
* Constructor
* @method initialize
* @param {Array} points Array of points
* @param {Object} options Options object
* @return {fabric.Polygon} thisArg
*/
initialize: function(points, options) {
options = options || { };
this.points = points;
this.callSuper('initialize', options);
this._calcDimensions();
},
/**
* @private
* @method _calcDimensions
*/
_calcDimensions: function() {
var points = this.points,
minX = min(points, 'x'),
minY = min(points, 'y'),
maxX = max(points, 'x'),
maxY = max(points, 'y');
this.width = (maxX - minX) || 1;
this.height = (maxY - minY) || 1;
this.minX = minX;
this.minY = minY;
},
/**
* Returns object representation of an instance
* @method toObject
* @return {Object} object representation of an instance
*/
toObject: function() {
return extend(this.callSuper('toObject'), {
points: this.points.concat()
});
},
/**
* Returns svg representation of an instance
* @method toSVG
* @return {string} svg representation of an instance
*/
toSVG: function() {
var points = [];
for (var i = 0, len = this.points.length; i < len; i++) {
points.push(toFixed(this.points[i].x, 2), ',', toFixed(this.points[i].y, 2), ' ');
}
return [
''
].join('');
},
/**
* @private
* @method _render
* @param ctx {CanvasRenderingContext2D} context to render on
*/
_render: function(ctx) {
var point;
ctx.beginPath();
ctx.moveTo(this.points[0].x, this.points[0].y);
for (var i = 0, len = this.points.length; i < len; i++) {
point = this.points[i];
ctx.lineTo(point.x, point.y);
}
if (this.fill) {
ctx.fill();
}
if (this.stroke) {
ctx.closePath();
ctx.stroke();
}
},
/**
* Returns complexity of an instance
* @method complexity
* @return {Number} complexity of this instance
*/
complexity: function() {
return this.points.length;
}
});
/**
* List of attribute names to account for when parsing SVG element (used by `fabric.Polygon.fromElement`)
* @static
* @see: http://www.w3.org/TR/SVG/shapes.html#PolygonElement
*/
fabric.Polygon.ATTRIBUTE_NAMES = 'fill fill-opacity opacity stroke stroke-width transform'.split(' ');
/**
* Returns fabric.Polygon instance from an SVG element
* @static
* @method fabric.Polygon.fromElement
* @param {SVGElement} element Element to parse
* @param {Object} options Options object
* @return {fabric.Polygon}
*/
fabric.Polygon.fromElement = function(element, options) {
if (!element) {
return null;
}
options || (options = { });
var points = fabric.parsePointsAttribute(element.getAttribute('points')),
parsedAttributes = fabric.parseAttributes(element, fabric.Polygon.ATTRIBUTE_NAMES);
for (var i = 0, len = points.length; i < len; i++) {
// normalize coordinates, according to containing box (dimensions of which are passed via `options`)
points[i].x -= (options.width / 2) || 0;
points[i].y -= (options.height / 2) || 0;
}
return new fabric.Polygon(points, extend(parsedAttributes, options));
};
/**
* Returns fabric.Polygon instance from an object representation
* @static
* @method fabric.Polygon.fromObject
* @param {Object} object Object to create an instance from
* @return {fabric.Polygon}
*/
fabric.Polygon.fromObject = function(object) {
return new fabric.Polygon(object.points, object);
};
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
var commandLengths = {
m: 2,
l: 2,
h: 1,
v: 1,
c: 6,
s: 4,
q: 4,
t: 2,
a: 7
};
function drawArc(ctx, x, y, coords) {
var rx = coords[0];
var ry = coords[1];
var rot = coords[2];
var large = coords[3];
var sweep = coords[4];
var ex = coords[5];
var ey = coords[6];
var segs = arcToSegments(ex, ey, rx, ry, large, sweep, rot, x, y);
for (var i=0; i 1) {
pl = Math.sqrt(pl);
rx *= pl;
ry *= pl;
}
var a00 = cos_th / rx;
var a01 = sin_th / rx;
var a10 = (-sin_th) / ry;
var a11 = (cos_th) / ry;
var x0 = a00 * ox + a01 * oy;
var y0 = a10 * ox + a11 * oy;
var x1 = a00 * x + a01 * y;
var y1 = a10 * x + a11 * y;
var d = (x1-x0) * (x1-x0) + (y1-y0) * (y1-y0);
var sfactor_sq = 1 / d - 0.25;
if (sfactor_sq < 0) sfactor_sq = 0;
var sfactor = Math.sqrt(sfactor_sq);
if (sweep === large) sfactor = -sfactor;
var xc = 0.5 * (x0 + x1) - sfactor * (y1-y0);
var yc = 0.5 * (y0 + y1) + sfactor * (x1-x0);
var th0 = Math.atan2(y0-yc, x0-xc);
var th1 = Math.atan2(y1-yc, x1-xc);
var th_arc = th1-th0;
if (th_arc < 0 && sweep === 1){
th_arc += 2*Math.PI;
} else if (th_arc > 0 && sweep === 0) {
th_arc -= 2 * Math.PI;
}
var segments = Math.ceil(Math.abs(th_arc / (Math.PI * 0.5 + 0.001)));
var result = [];
for (var i=0; i';
},
/**
* Returns object representation of an instance
* @method toObject
* @return {Object}
*/
toObject: function() {
var o = extend(this.callSuper('toObject'), {
path: this.path
});
if (this.sourcePath) {
o.sourcePath = this.sourcePath;
}
if (this.transformMatrix) {
o.transformMatrix = this.transformMatrix;
}
return o;
},
/**
* Returns dataless object representation of an instance
* @method toDatalessObject
* @return {Object}
*/
toDatalessObject: function() {
var o = this.toObject();
if (this.sourcePath) {
o.path = this.sourcePath;
}
delete o.sourcePath;
return o;
},
/**
* Returns svg representation of an instance
* @method toSVG
* @return {string} svg representation of an instance
*/
toSVG: function() {
var chunks = [];
for (var i = 0, len = this.path.length; i < len; i++) {
chunks.push(this.path[i].join(' '));
}
var path = chunks.join(' ');
return [
'',
'',
''
].join('');
},
/**
* Returns number representation of an instance complexity
* @method complexity
* @return {Number} complexity
*/
complexity: function() {
return this.path.length;
},
/**
* @private
* @method _parsePath
*/
_parsePath: function() {
var result = [ ],
currentPath,
chunks,
parsed;
for (var i = 0, chunksParsed, len = this.path.length; i < len; i++) {
currentPath = this.path[i];
chunks = currentPath.slice(1).trim().replace(/(\d)-/g, '$1###-').split(/\s|,|###/);
chunksParsed = [ currentPath.charAt(0) ];
for (var j = 0, jlen = chunks.length; j < jlen; j++) {
parsed = parseFloat(chunks[j]);
if (!isNaN(parsed)) {
chunksParsed.push(parsed);
}
}
var command = chunksParsed[0].toLowerCase(),
commandLength = commandLengths[command];
if (chunksParsed.length - 1 > commandLength) {
for (var k = 1, klen = chunksParsed.length; k < klen; k += commandLength) {
result.push([ chunksParsed[0] ].concat(chunksParsed.slice(k, k + commandLength)));
}
}
else {
result.push(chunksParsed);
}
}
return result;
},
/**
* @method _parseDimensions
*/
_parseDimensions: function() {
var aX = [],
aY = [],
previousX,
previousY,
isLowerCase = false,
x,
y;
this.path.forEach(function(item, i) {
if (item[0] !== 'H') {
previousX = (i === 0) ? getX(item) : getX(this.path[i-1]);
}
if (item[0] !== 'V') {
previousY = (i === 0) ? getY(item) : getY(this.path[i-1]);
}
// lowercased letter denotes relative position;
// transform to absolute
if (item[0] === item[0].toLowerCase()) {
isLowerCase = true;
}
// last 2 items in an array of coordinates are the actualy x/y (except H/V);
// collect them
// TODO (kangax): support relative h/v commands
x = isLowerCase
? previousX + getX(item)
: item[0] === 'V'
? previousX
: getX(item);
y = isLowerCase
? previousY + getY(item)
: item[0] === 'H'
? previousY
: getY(item);
var val = parseInt(x, 10);
if (!isNaN(val)) aX.push(val);
val = parseInt(y, 10);
if (!isNaN(val)) aY.push(val);
}, this);
var minX = min(aX),
minY = min(aY),
deltaX = 0,
deltaY = 0;
var o = {
top: minY - deltaY,
left: minX - deltaX,
bottom: max(aY) - deltaY,
right: max(aX) - deltaX
};
o.width = o.right - o.left;
o.height = o.bottom - o.top;
return o;
}
});
/**
* Creates an instance of fabric.Path from an object
* @static
* @method fabric.Path.fromObject
* @return {fabric.Path} Instance of fabric.Path
*/
fabric.Path.fromObject = function(object) {
return new fabric.Path(object.path, object);
};
/**
* List of attribute names to account for when parsing SVG element (used by `fabric.Path.fromElement`)
* @static
* @see http://www.w3.org/TR/SVG/paths.html#PathElement
*/
fabric.Path.ATTRIBUTE_NAMES = 'd fill fill-opacity opacity fill-rule stroke stroke-width transform'.split(' ');
/**
* Creates an instance of fabric.Path from an SVG element
* @static
* @method fabric.Path.fromElement
* @param {SVGElement} element to parse
* @param {Object} options object
* @return {fabric.Path} Instance of fabric.Path
*/
fabric.Path.fromElement = function(element, options) {
var parsedAttributes = fabric.parseAttributes(element, fabric.Path.ATTRIBUTE_NAMES);
return new fabric.Path(parsedAttributes.d, extend(parsedAttributes, options));
};
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
"use strict";
var fabric = global.fabric || (global.fabric = { }),
extend = fabric.util.object.extend,
invoke = fabric.util.array.invoke,
parentToObject = fabric.Object.prototype.toObject,
camelize = fabric.util.string.camelize,
capitalize = fabric.util.string.capitalize;
if (fabric.PathGroup) {
fabric.warn('fabric.PathGroup is already defined');
return;
}
/**
* @class PathGroup
* @extends fabric.Path
*/
fabric.PathGroup = fabric.util.createClass(fabric.Path, /** @scope fabric.PathGroup.prototype */ {
/**
* @property
* @type String
*/
type: 'path-group',
/**
* @property
* @type String
*/
fill: '',
/**
* @property
* @type Boolean
*/
forceFillOverwrite: false,
/**
* Constructor
* @method initialize
* @param {Array} paths
* @param {Object} [options] Options object
* @return {fabric.PathGroup} thisArg
*/
initialize: function(paths, options) {
options = options || { };
this.paths = paths || [ ];
for (var i = this.paths.length; i--; ) {
this.paths[i].group = this;
}
this.setOptions(options);
this.setCoords();
if (options.sourcePath) {
this.setSourcePath(options.sourcePath);
}
},
/**
* Renders this group on a specified context
* @method render
* @param {CanvasRenderingContext2D} ctx Context to render this instance on
*/
render: function(ctx) {
ctx.save();
var m = this.transformMatrix;
if (m) {
ctx.transform(m[0], m[1], m[2], m[3], m[4], m[5]);
}
this.transform(ctx);
for (var i = 0, l = this.paths.length; i < l; ++i) {
this.paths[i].render(ctx, true);
}
if (this.active) {
this.drawBorders(ctx);
this.hideCorners || this.drawCorners(ctx);
}
ctx.restore();
},
/**
* Sets certain property to a certain value
* @method _set
* @param {String} prop
* @param {Any} value
* @return {fabric.PathGroup} thisArg
*/
_set: function(prop, value) {
if ((prop === 'fill' || prop === 'overlayFill') && value && this.isSameColor()) {
var i = this.paths.length;
while (i--) {
this.paths[i]._set(prop, value);
}
}
return this.callSuper('_set', prop, value);
},
/**
* Returns object representation of this path group
* @method toObject
* @return {Object} object representation of an instance
*/
toObject: function() {
return extend(parentToObject.call(this), {
paths: invoke(this.getObjects(), 'toObject'),
sourcePath: this.sourcePath
});
},
/**
* Returns dataless object representation of this path group
* @method toDatalessObject
* @return {Object} dataless object representation of an instance
*/
toDatalessObject: function() {
var o = this.toObject();
if (this.sourcePath) {
o.paths = this.sourcePath;
}
return o;
},
/**
* Returns svg representation of an instance
* @method toSVG
* @return {string} svg representation of an instance
*/
toSVG: function() {
var objects = this.getObjects();
var markup = [
''
];
for (var i = 0, len = objects.length; i < len; i++) {
markup.push(objects[i].toSVG());
}
markup.push('');
return markup.join('');
},
/**
* Returns a string representation of this path group
* @method toString
* @return {String} string representation of an object
*/
toString: function() {
return '#';
},
/**
* Returns true if all paths in this group are of same color
* @method isSameColor
* @return {Boolean} true if all paths are of the same color (`fill`)
*/
isSameColor: function() {
var firstPathFill = this.getObjects()[0].get('fill');
return this.getObjects().every(function(path) {
return path.get('fill') === firstPathFill;
});
},
/**
* Returns number representation of object's complexity
* @method complexity
* @return {Number} complexity
*/
complexity: function() {
return this.paths.reduce(function(total, path) {
return total + ((path && path.complexity) ? path.complexity() : 0);
}, 0);
},
/**
* Makes path group grayscale
* @method toGrayscale
* @return {fabric.PathGroup} thisArg
*/
toGrayscale: function() {
var i = this.paths.length;
while (i--) {
this.paths[i].toGrayscale();
}
return this;
},
/**
* Returns all paths in this path group
* @method getObjects
* @return {Array} array of path objects included in this path group
*/
getObjects: function() {
return this.paths;
}
});
/**
* @private
* @method instantiatePaths
*/
function instantiatePaths(paths) {
for (var i = 0, len = paths.length; i < len; i++) {
if (!(paths[i] instanceof fabric.Object)) {
var klassName = camelize(capitalize(paths[i].type));
paths[i] = fabric[klassName].fromObject(paths[i]);
}
}
return paths;
}
/**
* Creates fabric.PathGroup instance from an object representation
* @static
* @method fabric.PathGroup.fromObject
* @param {Object} object
* @return {fabric.PathGroup}
*/
fabric.PathGroup.fromObject = function(object) {
var paths = instantiatePaths(object.paths);
return new fabric.PathGroup(paths, object);
};
})(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,
invoke = fabric.util.array.invoke,
removeFromArray = fabric.util.removeFromArray;
if (fabric.Group) {
return;
}
/**
* @class Group
* @extends fabric.Object
*/
fabric.Group = fabric.util.createClass(fabric.Object, /** @scope fabric.Group.prototype */ {
/**
* @property
* @type String
*/
type: 'group',
/**
* Constructor
* @method initialized
* @param {Object} objects Group objects
* @param {Object} [options] Options object
* @return {Object} thisArg
*/
initialize: function(objects, options) {
options = options || { };
this.objects = objects || [];
this.originalState = { };
this.callSuper('initialize');
this._calcBounds();
this._updateObjectsCoords();
if (options) {
extend(this, options);
}
this._setOpacityIfSame();
// group is active by default
this.setCoords(true);
this.saveCoords();
//this.activateAllObjects();
},
/**
* @private
* @method _updateObjectsCoords
*/
_updateObjectsCoords: function() {
var groupDeltaX = this.left,
groupDeltaY = this.top;
this.forEachObject(function(object) {
var objectLeft = object.get('left'),
objectTop = object.get('top');
object.set('originalLeft', objectLeft);
object.set('originalTop', objectTop);
object.set('left', objectLeft - groupDeltaX);
object.set('top', objectTop - groupDeltaY);
object.setCoords();
// do not display corners of objects enclosed in a group
object.hideCorners = true;
}, this);
},
/**
* Returns string represenation of a group
* @method toString
* @return {String}
*/
toString: function() {
return '#';
},
/**
* Returns an array of all objects in this group
* @method getObjects
* @return {Array} group objects
*/
getObjects: function() {
return this.objects;
},
/**
* Adds an object to a group; Then recalculates group's dimension, position.
* @method addWithUpdate
* @param {Object} object
* @return {fabric.Group} thisArg
* @chainable
*/
addWithUpdate: function(object) {
this._restoreObjectsState();
this.objects.push(object);
this._calcBounds();
this._updateObjectsCoords();
return this;
},
/**
* Removes an object from a group; Then recalculates group's dimension, position.
* @method removeWithUpdate
* @param {Object} object
* @return {fabric.Group} thisArg
* @chainable
*/
removeWithUpdate: function(object) {
this._restoreObjectsState();
removeFromArray(this.objects, object);
object.setActive(false);
this._calcBounds();
this._updateObjectsCoords();
return this;
},
/**
* Adds an object to a group
* @method add
* @param {Object} object
* @return {fabric.Group} thisArg
* @chainable
*/
add: function(object) {
this.objects.push(object);
return this;
},
/**
* Removes an object from a group
* @method remove
* @param {Object} object
* @return {fabric.Group} thisArg
* @chainable
*/
remove: function(object) {
removeFromArray(this.objects, object);
return this;
},
/**
* Returns a size of a group (i.e: length of an array containing its objects)
* @return {Number} Group size
*/
size: function() {
return this.getObjects().length;
},
/**
* @private
*/
_set: function(key, value) {
if (key === 'fill' || key === 'opacity') {
var i = this.objects.length;
this[key] = value;
while (i--) {
this.objects[i].set(key, value);
}
}
else {
this[key] = value;
}
},
/**
* Returns true if a group contains an object
* @method contains
* @param {Object} object Object to check against
* @return {Boolean} `true` if group contains an object
*/
contains: function(object) {
return this.objects.indexOf(object) > -1;
},
/**
* Returns object representation of an instance
* @method toObject
* @return {Object} object representation of an instance
*/
toObject: function() {
return extend(this.callSuper('toObject'), {
objects: invoke(this.objects, 'toObject')
});
},
/**
* Renders instance on a given context
* @method render
* @param {CanvasRenderingContext2D} ctx context to render instance on
*/
render: function(ctx, noTransform) {
ctx.save();
this.transform(ctx);
var groupScaleFactor = Math.max(this.scaleX, this.scaleY);
//The array is now sorted in order of highest first, so start from end.
for (var i = this.objects.length; i > 0; i--) {
var object = this.objects[i-1],
originalScaleFactor = object.borderScaleFactor,
originalHasRotatingPoint = object.hasRotatingPoint;
object.borderScaleFactor = groupScaleFactor;
object.hasRotatingPoint = false;
object.render(ctx);
object.borderScaleFactor = originalScaleFactor;
object.hasRotatingPoint = originalHasRotatingPoint;
}
if (!noTransform && this.active) {
this.drawBorders(ctx);
this.hideCorners || this.drawCorners(ctx);
}
ctx.restore();
this.setCoords();
},
/**
* Returns object from the group at the specified index
* @method item
* @param index {Number} index of item to get
* @return {fabric.Object}
*/
item: function(index) {
return this.getObjects()[index];
},
/**
* Returns complexity of an instance
* @method complexity
* @return {Number} complexity
*/
complexity: function() {
return this.getObjects().reduce(function(total, object) {
total += (typeof object.complexity === 'function') ? object.complexity() : 0;
return total;
}, 0);
},
/**
* Retores original state of each of group objects (original state is that which was before group was created).
* @private
* @method _restoreObjectsState
* @return {fabric.Group} thisArg
* @chainable
*/
_restoreObjectsState: function() {
this.objects.forEach(this._restoreObjectState, this);
return this;
},
/**
* Restores original state of a specified object in group
* @private
* @method _restoreObjectState
* @param {fabric.Object} object
* @return {fabric.Group} thisArg
*/
_restoreObjectState: function(object) {
var groupLeft = this.get('left'),
groupTop = this.get('top'),
groupAngle = this.getAngle() * (Math.PI / 180),
rotatedTop = Math.cos(groupAngle) * object.get('top') + Math.sin(groupAngle) * object.get('left'),
rotatedLeft = -Math.sin(groupAngle) * object.get('top') + Math.cos(groupAngle) * object.get('left');
object.setAngle(object.getAngle() + this.getAngle());
object.set('left', groupLeft + rotatedLeft * this.get('scaleX'));
object.set('top', groupTop + rotatedTop * this.get('scaleY'));
object.set('scaleX', object.get('scaleX') * this.get('scaleX'));
object.set('scaleY', object.get('scaleY') * this.get('scaleY'));
object.setCoords();
object.hideCorners = false;
object.setActive(false);
object.setCoords();
return this;
},
/**
* Destroys a group (restoring state of its objects)
* @method destroy
* @return {fabric.Group} thisArg
* @chainable
*/
destroy: function() {
return this._restoreObjectsState();
},
/**
* Saves coordinates of this instance (to be used together with `hasMoved`)
* @saveCoords
* @return {fabric.Group} thisArg
* @chainable
*/
saveCoords: function() {
this._originalLeft = this.get('left');
this._originalTop = this.get('top');
return this;
},
/**
* Checks whether this group was moved (since `saveCoords` was called last)
* @method hasMoved
* @return {Boolean} true if an object was moved (since fabric.Group#saveCoords was called)
*/
hasMoved: function() {
return this._originalLeft !== this.get('left') ||
this._originalTop !== this.get('top');
},
/**
* Sets coordinates of all group objects
* @method setObjectsCoords
* @return {fabric.Group} thisArg
* @chainable
*/
setObjectsCoords: function() {
this.forEachObject(function(object) {
object.setCoords();
});
return this;
},
/**
* Activates (makes active) all group objects
* @method activateAllObjects
* @return {fabric.Group} thisArg
* @chainable
*/
activateAllObjects: function() {
this.forEachObject(function(object) {
object.setActive();
});
return this;
},
/**
* Executes given function for each object in this group
* @method forEachObject
* @param {Function} callback
* Callback invoked with current object as first argument,
* index - as second and an array of all objects - as third.
* Iteration happens in reverse order (for performance reasons).
* 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 {fabric.Group} thisArg
* @chainable
*/
forEachObject: fabric.StaticCanvas.prototype.forEachObject,
/**
* @private
* @method _setOpacityIfSame
*/
_setOpacityIfSame: function() {
var objects = this.getObjects(),
firstValue = objects[0] ? objects[0].get('opacity') : 1;
var isSameOpacity = objects.every(function(o) {
return o.get('opacity') === firstValue;
});
if (isSameOpacity) {
this.opacity = firstValue;
}
},
/**
* @private
* @method _calcBounds
*/
_calcBounds: function() {
var aX = [],
aY = [],
minX, minY, maxX, maxY, o, width, height,
i = 0,
len = this.objects.length;
for (; i < len; ++i) {
o = this.objects[i];
o.setCoords();
for (var prop in o.oCoords) {
aX.push(o.oCoords[prop].x);
aY.push(o.oCoords[prop].y);
}
}
minX = min(aX);
maxX = max(aX);
minY = min(aY);
maxY = max(aY);
width = (maxX - minX) || 0;
height = (maxY - minY) || 0;
this.width = width;
this.height = height;
this.left = (minX + width / 2) || 0;
this.top = (minY + height / 2) || 0;
},
/**
* Checks if point is contained within the group
* @method containsPoint
* @param {fabric.Point} point point with `x` and `y` properties
* @return {Boolean} true if point is contained within group
*/
containsPoint: function(point) {
var halfWidth = this.get('width') / 2,
halfHeight = this.get('height') / 2,
centerX = this.get('left'),
centerY = this.get('top');
return centerX - halfWidth < point.x &&
centerX + halfWidth > point.x &&
centerY - halfHeight < point.y &&
centerY + halfHeight > point.y;
},
/**
* Makes all of this group's objects grayscale (i.e. calling `toGrayscale` on them)
* @method toGrayscale
*/
toGrayscale: function() {
var i = this.objects.length;
while (i--) {
this.objects[i].toGrayscale();
}
},
/**
* Returns svg representation of an instance
* @method toSVG
* @return {string} svg representation of an instance
*/
toSVG: function() {
var objectsMarkup = [ ];
for (var i = 0, len = this.objects.length; i < len; i++) {
objectsMarkup.push(this.objects[i].toSVG());
}
return (
'' +
objectsMarkup.join('') +
'');
}
});
/**
* Returns fabric.Group instance from an object representation
* @static
* @method fabric.Group.fromObject
* @param object {Object} object to create a group from
* @param options {Object} options object
* @return {fabric.Group} an instance of fabric.Group
*/
fabric.Group.fromObject = function(object, callback) {
fabric.util.enlivenObjects(object.objects, function(enlivenedObjects) {
delete object.objects;
callback && callback(new fabric.Group(enlivenedObjects, object));
});
};
fabric.Group.async = 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;
}
/**
* @class Image
* @extends fabric.Object
*/
fabric.Image = fabric.util.createClass(fabric.Object, /** @scope fabric.Image.prototype */ {
/**
* @property
* @type Boolean
*/
active: false,
/**
* @property
* @type String
*/
type: 'image',
/**
* @property
* @type String
*/
preserveAspectRatio: 'xMidYMid',
/**
* @property
* @type Object
*/
clipPath: null,
/**
* Constructor
* @param {HTMLImageElement | String} element Image element
* @param {Object} options optional
*/
initialize: function(element, options) {
options || (options = { });
this.callSuper('initialize', options);
this._initElement(element);
this._originalImage = this.getElement();
this._initConfig(options);
this.filters = [ ];
if (options.filters) {
this.filters = options.filters;
this.applyFilters();
}
},
/**
* Returns image element which this instance if based on
* @method getElement
* @return {HTMLImageElement} image element
*/
getElement: function() {
return this._element;
},
/**
* Sets image element for this instance to a specified one
* @method setElement
* @param {HTMLImageElement} element
* @return {fabric.Image} thisArg
* @chainable
*/
setElement: function(element) {
this._element = element;
this._initConfig();
return this;
},
/**
* Sets clip path for this instance to a specified one
* @method setClipPath
* @param {fabric.Object} element
*/
setClipPath: function(element) {
this.clipPath = element;
},
/**
* Returns original size of an image
* @method getOriginalSize
* @return {Object} object with "width" and "height" properties
*/
getOriginalSize: function() {
var element = this.getElement();
return {
width: element.width,
height: element.height
};
},
/**
* Renders image on a specified context
* @method render
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
render: function(ctx, noTransform) {
ctx.save();
var m = this.transformMatrix;
this._preserveAspectRatio();
if (this.group) {
ctx.translate(-this.group.width/2 + this.width/2 + this.left, -this.group.height/2 + this.height/2 + this.top);
}
if (m) {
ctx.transform(m[0], m[1], m[2], m[3], m[4], m[5]);
}
if (!noTransform) {
this.transform(ctx);
}
if(this.clipPath){
this.clipPath.render(ctx);
ctx.clip();
}
this._render(ctx);
if (this.active && !noTransform) {
this.drawBorders(ctx);
this.hideCorners || this.drawCorners(ctx);
}
ctx.restore();
},
/**
* Returns object representation of an instance
* @method toObject
* @return {Object} Object representation of an instance
*/
toObject: function() {
return extend(this.callSuper('toObject'), {
src: this._originalImage.src || this._originalImage._src,
filters: this.filters.concat()
});
},
/**
* Returns svg representation of an instance
* @method toSVG
* @return {string} svg representation of an instance
*/
toSVG: function() {
return ''+
' element with actual transformation, then offsetting object to the top/left
// so that object's center aligns with container's left/top
'transform="translate('+ (-this.width/2) + ' ' + (-this.height/2) + ')" ' +
'width="' + this.width + '" ' +
'height="' + this.height + '"' + '/>'+
'';
},
/**
* Returns source of an image
* @method getSrc
* @return {String} Source of an image
*/
getSrc: function() {
return this.getElement().src || this.getElement()._src;
},
/**
* Returns string representation of an instance
* @method toString
* @return {String} String representation of an instance
*/
toString: function() {
return '#';
},
/**
* Returns a clone of an instance
* @mthod clone
* @param {Function} callback Callback is invoked with a clone as a first argument
*/
clone: function(callback) {
this.constructor.fromObject(this.toObject(), callback);
},
/**
* Applies filters assigned to this image (from "filters" array)
* @mthod applyFilters
* @param {Function} callback Callback is invoked when all filters have been applied and new image is generated
*/
applyFilters: function(callback) {
if (this.filters.length === 0) {
this.setElement(this._originalImage);
callback && callback();
return;
}
var isLikelyNode = typeof Buffer !== 'undefined' && typeof window === 'undefined',
imgEl = this._originalImage,
canvasEl = fabric.document.createElement('canvas'),
replacement = isLikelyNode ? new (require('canvas').Image)() : fabric.document.createElement('img'),
_this = this;
if (!canvasEl.getContext && typeof G_vmlCanvasManager !== 'undefined') {
G_vmlCanvasManager.initElement(canvasEl);
}
canvasEl.width = imgEl.width;
canvasEl.height = imgEl.height;
canvasEl.getContext('2d').drawImage(imgEl, 0, 0, imgEl.width, imgEl.height);
this.filters.forEach(function(filter) {
filter && filter.applyTo(canvasEl);
});
/** @ignore */
replacement.onload = function() {
_this._element = replacement;
callback && callback();
replacement.onload = canvasEl = imgEl = null;
};
replacement.width = imgEl.width;
replacement.height = imgEl.height;
if (isLikelyNode) {
var base64str = canvasEl.toDataURL('image/png').replace(/data:image\/png;base64,/, '');
replacement.src = new Buffer(base64str, 'base64');
_this._element = replacement;
// onload doesn't fire in node, so we invoke callback manually
callback && callback();
}
else {
replacement.src = canvasEl.toDataURL('image/png');
}
return this;
},
/**
* @private
* @method _render
*/
_render: function(ctx) {
ctx.drawImage(
this.getElement(),
- this.width / 2,
-this.height / 2,
this.width,
this.height
);
},
/**
* @private
* @method _resetWidthHeight
*/
_resetWidthHeight: function() {
var element = this.getElement();
this.set('width', element.width);
this.set('height', element.height);
},
/**
* @private
* @method _preserveAspectRatio
* @see http://www.w3.org/TR/SVG/coords.html#PreserveAspectRatioAttribute
*/
_preserveAspectRatio: function() {
var element = this.getElement(),
desiredWidth = this.get('width'),
desiredHeight = this.get('height');
if(this.preserveAspectRatio.indexOf('none') > -1){
this.set('width', desiredWidth);
this.set('height', desiredHeight);
return;
}
var scale = 1;
if(desiredHeight > desiredWidth){
scale = desiredWidth / element.width;
} else {
scale = desiredHeight / element.height;
}
this.set('width', element.width * scale);
this.set('height', element.height * scale);
var posX = this.preserveAspectRatio.substr(0,4),
posY = this.preserveAspectRatio.substr(4,4);
switch(posX){
case "xMin":
//this.set('left', this.left);
break;
case "xMid":
this.set('left', this.left + (desiredWidth - this.width)/2);
break;
case "xMax":
this.set('left', this.left + desiredWidth - this.width);
break;
};
switch(posY){
case "YMin":
//this.set('top', this.top );
break;
case "YMid":
this.set('top', this.top + (desiredHeight - this.height)/2);
break;
case "YMax":
this.set('top', this.top + desiredHeight - this.height);
break;
}
},
/**
* The Image class's initialization method. This method is automatically
* called by the constructor.
* @private
* @method _initElement
* @param {HTMLImageElement|String} el The element representing the image
*/
_initElement: function(element) {
this.setElement(fabric.util.getById(element));
fabric.util.addClass(this.getElement(), fabric.Image.CSS_CANVAS);
},
/**
* @private
* @method _initConfig
* @param {Object} options Options object
*/
_initConfig: function(options) {
options || (options = { });
this.setOptions(options);
this._setWidthHeight(options);
this._setPreserveAspectRatio(options);
},
/**
* @private
* @method _initFilters
* @param {Object} object Object with filters property
*/
_initFilters: function(object) {
if (object.filters && object.filters.length) {
this.filters = object.filters.map(function(filterObj) {
return filterObj && fabric.Image.filters[filterObj.type].fromObject(filterObj);
});
}
},
/**
* @private
* @method _setWidthHeight
* @param {Object} options Object with width/height properties
*/
_setWidthHeight: function(options) {
this.width = 'width' in options
? options.width
: (this.getElement().width || 0);
this.height = 'height' in options
? options.height
: (this.getElement().height || 0);
},
/**
* @private
* @method _setPreserveAspectRatio
* @param {Object} options Object with preserveAspectRatio property
*/
_setPreserveAspectRatio: function(options) {
this.preserveAspectRatio = 'preserveAspectRatio' in options
? options.preserveAspectRatio
: 'xMidYMid';
},
/**
* Returns complexity of an instance
* @method complexity
* @return {Number} complexity
*/
complexity: function() {
return 1;
}
});
/**
* Default CSS class name for canvas
* @static
* @type String
*/
fabric.Image.CSS_CANVAS = "canvas-img";
fabric.Image.prototype.getSvgSrc = fabric.Image.prototype.getSrc;
/**
* Creates an instance of fabric.Image from its object representation
* @static
* @method fromObject
* @param object {Object}
* @param callback {Function} optional
*/
fabric.Image.fromObject = function(object, callback) {
var img = fabric.document.createElement('img'),
src = object.src;
if (object.width) {
img.width = object.width;
}
if (object.height) {
img.height = object.height;
}
/** @ignore */
img.onload = function() {
fabric.Image.prototype._initFilters.call(object, object);
var instance = new fabric.Image(img, object);
callback && callback(instance);
img = img.onload = null;
};
img.src = src;
};
/**
* Creates an instance of fabric.Image from an URL string
* @static
* @method fromURL
* @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) {
var img = fabric.document.createElement('img');
/** @ignore */
img.onload = function() {
if (callback) {
callback(new fabric.Image(img, imgOptions));
}
img = img.onload = null;
};
img.src = url;
};
/**
* List of attribute names to account for when parsing SVG element (used by {@link fabric.Image.fromElement})
* @static
* @see http://www.w3.org/TR/SVG/struct.html#ImageElement
*/
fabric.Image.ATTRIBUTE_NAMES = 'x y width height fill fill-opacity opacity stroke stroke-width transform xlink:href preserveAspectRatio'.split(' ');
/**
* Returns {@link fabric.Image} instance from an SVG element
* @static
* @method fabric.Image.fromElement
* @param {SVGElement} element Element to parse
* @param {Function} callback Callback to execute when fabric.Image object is created
* @param {Object} [options] Options object
* @return {fabric.Image}
*/
fabric.Image.fromElement = function(element, callback, options) {
options || (options = { });
var parsedAttributes = fabric.parseAttributes(element, fabric.Image.ATTRIBUTE_NAMES);
fabric.Image.fromURL(parsedAttributes['xlink:href'], callback, parsedAttributes);
};
fabric.Image.async = true;
})(typeof exports !== 'undefined' ? exports : this);
fabric.util.object.extend(fabric.Object.prototype, {
/**
* @method _getAngleValueForStraighten
* @return {Number} angle value
* @private
*/
_getAngleValueForStraighten: function() {
var angle = this.get('angle');
// TODO (kangax): can this be simplified?
if (angle > -225 && angle <= -135) { return -180; }
else if (angle > -135 && angle <= -45) { return -90; }
else if (angle > -45 && angle <= 45) { return 0; }
else if (angle > 45 && angle <= 135) { return 90; }
else if (angle > 135 && angle <= 225 ) { return 180; }
else if (angle > 225 && angle <= 315) { return 270; }
else if (angle > 315) { return 360; }
return 0;
},
/**
* @method straighten
* @return {fabric.Object} thisArg
* @chainable
*/
straighten: function() {
var angle = this._getAngleValueForStraighten();
this.setAngle(angle);
return this;
},
/**
* @method fxStraighten
* @param {Object} callbacks
* - onComplete: invoked on completion
* - 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.setAngle(value);
onChange();
},
onComplete: function() {
_this.setCoords();
onComplete();
},
onStart: function() {
_this.setActive(false);
}
});
return this;
}
});
fabric.util.object.extend(fabric.StaticCanvas.prototype, {
/**
* Straightens object, then rerenders canvas
* @method straightenObject
* @param {fabric.Object} object Object to straighten
* @return {fabric.Canvas} thisArg
* @chainable
*/
straightenObject: function (object) {
object.straighten();
this.renderAll();
return this;
},
/**
* Same as `fabric.Canvas#straightenObject`, but animated
* @method fxStraightenObject
* @param {fabric.Object} object Object to straighten
* @return {fabric.Canvas} thisArg
* @chainable
*/
fxStraightenObject: function (object) {
object.fxStraighten({
onChange: this.renderAll.bind(this)
});
return this;
}
});
/**
* @namespace
*/
fabric.Image.filters = { };
/**
* @class fabric.Image.filters.Grayscale
* @memberOf fabric.Image.filters
*/
fabric.Image.filters.Grayscale = fabric.util.createClass( /** @scope fabric.Image.filters.Grayscale.prototype */ {
/**
* @param {String} type
*/
type: "Grayscale",
/**
* @method applyTo
* @memberOf fabric.Image.filters.Grayscale.prototype
* @param {Object} canvasEl Canvas element to apply filter to
*/
applyTo: function(canvasEl) {
var context = canvasEl.getContext('2d'),
imageData = context.getImageData(0, 0, canvasEl.width, canvasEl.height),
data = imageData.data,
iLen = imageData.width,
jLen = imageData.height,
index, average, i, j;
for (i = 0; i < iLen; i++) {
for (j = 0; j < jLen; j++) {
index = (i * 4) * jLen + (j * 4);
average = (data[index] + data[index + 1] + data[index + 2]) / 3;
data[index] = average;
data[index + 1] = average;
data[index + 2] = average;
}
}
context.putImageData(imageData, 0, 0);
},
/**
* @method toJSON
* @return {String} json representation of filter
*/
toJSON: function() {
return { type: this.type };
}
});
fabric.Image.filters.Grayscale.fromObject = function() {
return new fabric.Image.filters.Grayscale();
};
/**
* @class fabric.Image.filters.RemoveWhite
* @memberOf fabric.Image.filters
*/
fabric.Image.filters.RemoveWhite = fabric.util.createClass( /** @scope fabric.Image.filters.RemoveWhite.prototype */ {
/**
* @param {String} type
*/
type: "RemoveWhite",
/**
* @memberOf fabric.Image.filters.RemoveWhite.prototype
* @param {Object} [options] Options object
*/
initialize: function(options) {
options || (options = { });
this.threshold = options.threshold || 30;
this.distance = options.distance || 20;
},
/**
* @method applyTo
* @param {Object} canvasEl Canvas element to apply filter to
*/
applyTo: function(canvasEl) {
var context = canvasEl.getContext('2d'),
imageData = context.getImageData(0, 0, canvasEl.width, canvasEl.height),
data = imageData.data,
threshold = this.threshold,
distance = this.distance,
limit = 255 - threshold,
abs = Math.abs,
r, g, b;
for (var i = 0, len = data.length; i < len; i += 4) {
r = data[i];
g = data[i+1];
b = data[i+2];
if (r > limit &&
g > limit &&
b > limit &&
abs(r-g) < distance &&
abs(r-b) < distance &&
abs(g-b) < distance) {
data[i+3] = 1;
}
}
context.putImageData(imageData, 0, 0);
},
/**
* @method toJSON
* @return {String} json representation of filter
*/
toJSON: function() {
return {
type: this.type,
threshold: this.threshold,
distance: this.distance
};
}
});
fabric.Image.filters.RemoveWhite.fromObject = function(object) {
return new fabric.Image.filters.RemoveWhite(object);
};
/**
* @class fabric.Image.filters.Invert
* @memberOf fabric.Image.filters
*/
fabric.Image.filters.Invert = fabric.util.createClass( /** @scope fabric.Image.filters.Invert.prototype */ {
/**
* @param {String} type
*/
type: "Invert",
/**
* @method applyTo
* @memberOf fabric.Image.filters.Invert.prototype
* @param {Object} canvasEl Canvas element to apply filter to
*/
applyTo: function(canvasEl) {
var context = canvasEl.getContext('2d'),
imageData = context.getImageData(0, 0, canvasEl.width, canvasEl.height),
data = imageData.data,
iLen = data.length, i;
for (i = 0; i < iLen; i+=4) {
data[i] = 255 - data[i];
data[i + 1] = 255 - data[i + 1];
data[i + 2] = 255 - data[i + 2];
}
context.putImageData(imageData, 0, 0);
},
/**
* @method toJSON
* @return {String} json representation of filter
*/
toJSON: function() {
return { type: this.type };
}
});
fabric.Image.filters.Invert.fromObject = function() {
return new fabric.Image.filters.Invert();
};
/**
* @class fabric.Image.filters.Sepia
* @memberOf fabric.Image.filters
*/
fabric.Image.filters.Sepia = fabric.util.createClass( /** @scope fabric.Image.filters.Sepia.prototype */ {
/**
* @param {String} type
*/
type: "Sepia",
/**
* @method applyTo
* @memberOf fabric.Image.filters.Sepia.prototype
* @param {Object} canvasEl Canvas element to apply filter to
*/
applyTo: function(canvasEl) {
var context = canvasEl.getContext('2d'),
imageData = context.getImageData(0, 0, canvasEl.width, canvasEl.height),
data = imageData.data,
iLen = data.length, i, avg;
for (i = 0; i < iLen; i+=4) {
avg = 0.3 * data[i] + 0.59 * data[i + 1] + 0.11 * data[i + 2];
data[i] = avg + 100;
data[i + 1] = avg + 50;
data[i + 2] = avg + 255;
}
context.putImageData(imageData, 0, 0);
},
/**
* @method toJSON
* @return {String} json representation of filter
*/
toJSON: function() {
return { type: this.type };
}
});
fabric.Image.filters.Sepia.fromObject = function() {
return new fabric.Image.filters.Sepia();
};
/**
* @class fabric.Image.filters.Sepia2
* @memberOf fabric.Image.filters
*/
fabric.Image.filters.Sepia2 = fabric.util.createClass( /** @scope fabric.Image.filters.Sepia2.prototype */ {
/**
* @param {String} type
*/
type: "Sepia2",
/**
* @method applyTo
* @memberOf fabric.Image.filters.Sepia.prototype
* @param {Object} canvasEl Canvas element to apply filter to
*/
applyTo: function(canvasEl) {
var context = canvasEl.getContext('2d'),
imageData = context.getImageData(0, 0, canvasEl.width, canvasEl.height),
data = imageData.data,
iLen = data.length, i, r, g, b;
for (i = 0; i < iLen; i+=4) {
r = data[i];
g = data[i + 1];
b = data[i + 2];
data[i] = (r * 0.393 + g * 0.769 + b * 0.189 ) / 1.351;
data[i + 1] = (r * 0.349 + g * 0.686 + b * 0.168 ) / 1.203;
data[i + 2] = (r * 0.272 + g * 0.534 + b * 0.131 ) / 2.140;
}
context.putImageData(imageData, 0, 0);
},
/**
* @method toJSON
* @return {String} json representation of filter
*/
toJSON: function() {
return { type: this.type };
}
});
fabric.Image.filters.Sepia2.fromObject = function() {
return new fabric.Image.filters.Sepia2();
};
/**
* @class fabric.Image.filters.Brightness
* @memberOf fabric.Image.filters
*/
fabric.Image.filters.Brightness = fabric.util.createClass( /** @scope fabric.Image.filters.Brightness.prototype */ {
/**
* @param {String} type
*/
type: "Brightness",
/**
* @memberOf fabric.Image.filters.Brightness.prototype
* @param {Object} [options] Options object
*/
initialize: function(options) {
options || (options = { });
this.brightness = options.brightness || 100;
},
/**
* @method applyTo
* @param {Object} canvasEl Canvas element to apply filter to
*/
applyTo: function(canvasEl) {
var context = canvasEl.getContext('2d'),
imageData = context.getImageData(0, 0, canvasEl.width, canvasEl.height),
data = imageData.data,
brightness = this.brightness;
for (var i = 0, len = data.length; i < len; i += 4) {
data[i] += brightness;
data[i + 1] += brightness;
data[i + 2] += brightness;
}
context.putImageData(imageData, 0, 0);
},
/**
* @method toJSON
* @return {String} json representation of filter
*/
toJSON: function() {
return {
type: this.type,
brightness: this.brightness
};
}
});
fabric.Image.filters.Brightness.fromObject = function(object) {
return new fabric.Image.filters.Brightness(object);
};
/**
* @class fabric.Image.filters.Brightness
* @memberOf fabric.Image.filters
*/
fabric.Image.filters.Noise = fabric.util.createClass( /** @scope fabric.Image.filters.Noise.prototype */ {
/**
* @param {String} type
*/
type: "Noise",
/**
* @memberOf fabric.Image.filters.Brightness.prototype
* @param {Object} [options] Options object
*/
initialize: function(options) {
options || (options = { });
this.noise = options.noise || 100;
},
/**
* @method applyTo
* @param {Object} canvasEl Canvas element to apply filter to
*/
applyTo: function(canvasEl) {
var context = canvasEl.getContext('2d'),
imageData = context.getImageData(0, 0, canvasEl.width, canvasEl.height),
data = imageData.data,
noise = this.noise, rand;
for (var 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;
}
context.putImageData(imageData, 0, 0);
},
/**
* @method toJSON
* @return {String} json representation of filter
*/
toJSON: function() {
return {
type: this.type,
noise: this.noise
};
}
});
fabric.Image.filters.Noise.fromObject = function(object) {
return new fabric.Image.filters.Noise(object);
};
/**
* @class fabric.Image.filters.Brightness
* @memberOf fabric.Image.filters
*/
fabric.Image.filters.GradientTransparency = fabric.util.createClass( /** @scope fabric.Image.filters.GradientTransparency.prototype */ {
/**
* @param {String} type
*/
type: "GradientTransparency",
/**
* @memberOf fabric.Image.filters.GradientTransparency.prototype
* @param {Object} [options] Options object
*/
initialize: function(options) {
options || (options = { });
this.threshold = options.threshold || 100;
},
/**
* @method applyTo
* @param {Object} canvasEl Canvas element to apply filter to
*/
applyTo: function(canvasEl) {
var context = canvasEl.getContext('2d'),
imageData = context.getImageData(0, 0, canvasEl.width, canvasEl.height),
data = imageData.data,
threshold = this.threshold,
total = data.length;
for (var i = 0, len = data.length; i < len; i += 4) {
data[i + 3] = threshold + 255 * (total - i) / total;
}
context.putImageData(imageData, 0, 0);
},
/**
* @method toJSON
* @return {String} json representation of filter
*/
toJSON: function() {
return {
type: this.type,
threshold: this.threshold
};
}
});
fabric.Image.filters.GradientTransparency.fromObject = function(object) {
return new fabric.Image.filters.GradientTransparency(object);
};
/**
* @class fabric.Image.filters.Tint
* @memberOf fabric.Image.filters
*/
fabric.Image.filters.Tint = fabric.util.createClass( /** @scope fabric.Image.filters.Tint.prototype */ {
/**
* @param {String} type
*/
type: "Tint",
/**
* @memberOf fabric.Image.filters.Tint.prototype
* @param {Object} [options] Options object
*/
initialize: function(options) {
options || (options = { });
this.color = options.color || 0;
},
/**
* @method applyTo
* @param {Object} canvasEl Canvas element to apply filter to
*/
applyTo: function(canvasEl) {
var context = canvasEl.getContext('2d'),
imageData = context.getImageData(0, 0, canvasEl.width, canvasEl.height),
data = imageData.data,
iLen = data.length, i, a;
var rgb = parseInt(this.color, 10).toString(16);
var cr = parseInt('0x' + rgb.substr(0, 2), 16);
var cg = parseInt('0x' + rgb.substr(2, 2), 16);
var cb = parseInt('0x' + rgb.substr(4, 2), 16);
for (i = 0; i < iLen; i+=4) {
a = data[i+3];
if (a > 0){
data[i] = cr;
data[i+1] = cg;
data[i+2] = cb;
}
}
context.putImageData(imageData, 0, 0);
},
/**
* @method toJSON
* @return {String} json representation of filter
*/
toJSON: function() {
return {
type: this.type,
color: this.color
};
}
});
fabric.Image.filters.Tint.fromObject = function(object) {
return new fabric.Image.filters.Tint(object);
};
/**
* @class fabric.Image.filters.Convolute
* @memberOf fabric.Image.filters
* Adapted from http://www.html5rocks.com/en/tutorials/canvas/imagefilters/
*/
fabric.Image.filters.Convolute = fabric.util.createClass({
/**
* @param {String} type
*/
type: 'Convolute',
/**
* @memberOf fabric.Image.filters.Convolute.prototype
* @param {Object} [options] Options object
*/
initialize: function(options) {
options || (options = { });
this.opaque = options.opaque;
this.matrix = options.matrix || [ 0, 0, 0,
0, 1, 0,
0, 0, 0 ];
this.tmpCtx = fabric.document.createElement('canvas').getContext('2d');
},
/**
* @private
* @method _createImageData
*/
_createImageData: function(w, h) {
return this.tmpCtx.createImageData(w, h);
},
/**
* @method applyTo
* @param {Object} canvasEl Canvas element to apply filter to
*/
applyTo: function(canvasEl) {
var weights = this.matrix;
var context = canvasEl.getContext('2d');
var pixels = context.getImageData(0, 0, canvasEl.width, canvasEl.height);
var side = Math.round(Math.sqrt(weights.length));
var halfSide = Math.floor(side/2);
var src = pixels.data;
var sw = pixels.width;
var sh = pixels.height;
// pad output by the convolution matrix
var w = sw;
var h = sh;
var output = this._createImageData(w, h);
var dst = output.data;
// go through the destination image pixels
var alphaFac = this.opaque ? 1 : 0;
for (var y=0; y= 0 && scy < sh && scx >= 0 && scx < sw) {
var srcOff = (scy*sw+scx)*4;
var wt = weights[cy*side+cx];
r += src[srcOff] * wt;
g += src[srcOff+1] * wt;
b += src[srcOff+2] * wt;
a += src[srcOff+3] * wt;
}
}
}
dst[dstOff] = r;
dst[dstOff+1] = g;
dst[dstOff+2] = b;
dst[dstOff+3] = a + alphaFac*(255-a);
}
}
context.putImageData(output, 0, 0);
},
/**
* @method toJSON
* @return {String} json representation of filter
*/
toJSON: function() {
return {
type: this.type,
matrix: this.matrix
}
}
});
fabric.Image.filters.Convolute.fromObject = function(object) {
return new fabric.Image.filters.Convolute(object);
};
/**
* @class fabric.Image.filters.Pixelate
* @memberOf fabric.Image.filters
*/
fabric.Image.filters.Pixelate = fabric.util.createClass({
/**
* @param {String} type
*/
type: 'Pixelate',
/**
* @memberOf fabric.Image.filters.Pixelate.prototype
* @param {Object} [options] Options object
*/
initialize: function(options) {
options || (options = { });
this.blocksize = options.blocksize || 4;
},
/**
* @method applyTo
* @param {Object} canvasEl Canvas element to apply filter to
*/
applyTo: function(canvasEl) {
var context = canvasEl.getContext('2d'),
imageData = context.getImageData(0, 0, canvasEl.width, canvasEl.height),
data = imageData.data,
iLen = imageData.width,
jLen = imageData.height,
index, average, i, j,
offsetBlocksize = this.blocksize - 1, r, g, b, a;
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];
/*
blocksize: 4
[1,x,x,x,1]
[x,x,x,x,1]
[x,x,x,x,1]
[x,x,x,x,1]
[1,1,1,1,1]
*/
for (var _i = i, _ilen = i + this.blocksize; _i < _ilen; _i++) {
for (var _j = j, _jlen = j + this.blocksize; _j < _jlen; _j++) {
index = (_i * 4) * jLen + (_j * 4);
data[index] = r;
data[index + 1] = g;
data[index + 2] = b;
data[index + 3] = a;
}
}
}
}
context.putImageData(imageData, 0, 0);
},
/**
* @method toJSON
* @return {String} json representation of filter
*/
toJSON: function() {
return {
type: this.type,
blocksize: this.blocksize
};
}
});
fabric.Image.filters.Pixelate.fromObject = function(object) {
return new fabric.Image.filters.Pixelate(object);
};
(function(global) {
"use strict";
var fabric = global.fabric || (global.fabric = { }),
extend = fabric.util.object.extend,
clone = fabric.util.object.clone,
toFixed = fabric.util.toFixed;
if (fabric.Text) {
fabric.warn('fabric.Text is already defined');
return;
}
/**
* @class Text
* @extends fabric.Object
*/
fabric.Text = fabric.util.createClass(fabric.Object, /** @scope fabric.Text.prototype */ {
/**
* @property
* @type Number
*/
fontSize: 40,
/**
* @property
* @type Number
*/
fontWeight: 400,
/**
* @property
* @type String
*/
fontFamily: 'Times New Roman',
/**
* @property
* @type String
*/
textDecoration: '',
/**
* @property
* @type String | null
*/
textShadow: '',
/**
* Determines text alignment. Possible values: "left", "center", or "right".
* @property
* @type String
*/
textAlign: 'left',
/**
* @property
* @type String
*/
fontStyle: '',
/**
* @property
* @type Number
*/
lineHeight: 1.3,
/**
* @property
* @type String
*/
strokeStyle: '',
/**
* @property
* @type Number
*/
strokeWidth: 1,
/**
* @property
* @type String
*/
backgroundColor: '',
/**
* @property
* @type String | null
*/
path: null,
/**
* @property
* @type String
*/
type: 'text',
/**
* Indicates whether canvas native text methods should be used to render text (otherwise, Cufon is used)
* @property
* @type Boolean
*/
useNative: true,
/**
* Constructor
* @method initialize
* @param {String} text
* @param {Object} [options]
* @return {fabric.Text} thisArg
*/
initialize: function(text, options) {
options = options || { };
this._initStateProperties();
this.text = text;
this.setOptions(options);
this._theta = this.angle * Math.PI / 180;
this._initDimensions();
this.setCoords();
},
/**
* Renders text object on offscreen canvas, so that it would get dimensions
* @private
* @method _initDimensions
*/
_initDimensions: function() {
var canvasEl = fabric.document.createElement('canvas');
if (!canvasEl.getContext && typeof G_vmlCanvasManager !== 'undefined') {
G_vmlCanvasManager.initElement(canvasEl);
}
this._render(canvasEl.getContext('2d'));
},
/**
* Creates `stateProperties` list on an instance, and adds `fabric.Text` -specific ones to it
* (such as "fontFamily", "fontWeight", etc.)
* @private
* @method _initStateProperties
*/
_initStateProperties: function() {
this.stateProperties = this.stateProperties.concat();
this.stateProperties.push(
'fontFamily',
'fontWeight',
'fontSize',
'path',
'text',
'textDecoration',
'textShadow',
'textAlign',
'fontStyle',
'lineHeight',
'strokeStyle',
'strokeWidth',
'backgroundColor',
'useNative'
);
fabric.util.removeFromArray(this.stateProperties, 'width');
},
/**
* Returns string representation of an instance
* @method toString
* @return {String} String representation of text object
*/
toString: function() {
return '#';
},
/**
* @private
* @method _render
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_render: function(ctx) {
if (typeof Cufon === 'undefined' || this.useNative === true) {
this._renderViaNative(ctx);
}
else {
this._renderViaCufon(ctx);
}
},
/**
* @private
* @method _renderViaCufon
*/
_renderViaCufon: function(ctx) {
var o = Cufon.textOptions || (Cufon.textOptions = { });
// export options to be used by cufon.js
o.left = this.left;
o.top = this.top;
o.context = ctx;
o.color = this.fill;
var el = this._initDummyElementForCufon();
// set "cursor" to top/left corner
this.transform(ctx);
// draw text
Cufon.replaceElement(el, {
engine: 'canvas',
separate: 'none',
fontFamily: this.fontFamily,
fontWeight: this.fontWeight,
textDecoration: this.textDecoration,
textShadow: this.textShadow,
textAlign: this.textAlign,
fontStyle: this.fontStyle,
lineHeight: this.lineHeight,
strokeStyle: this.strokeStyle,
strokeWidth: this.strokeWidth,
backgroundColor: this.backgroundColor
});
// update width, height
this.width = o.width;
this.height = o.height;
this._totalLineHeight = o.totalLineHeight;
this._fontAscent = o.fontAscent;
this._boundaries = o.boundaries;
this._shadowOffsets = o.shadowOffsets;
this._shadows = o.shadows || [ ];
el = null;
// need to set coords _after_ the width/height was retreived from Cufon
this.setCoords();
},
/**
* @private
* @method _render_native
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_renderViaNative: function(ctx) {
this.transform(ctx);
this._setTextStyles(ctx);
var textLines = this.text.split(/\r?\n/);
this.width = this._getTextWidth(ctx, textLines);
this.height = this._getTextHeight(ctx, textLines);
this._renderTextBackground(ctx, textLines);
this._setTextShadow(ctx);
this._renderTextFill(ctx, textLines);
this.textShadow && ctx.restore();
this._renderTextStroke(ctx, textLines);
if (this.textAlign !== 'left') {
ctx.restore();
}
this._renderTextDecoration(ctx, textLines);
this._setBoundaries(ctx, textLines);
this._totalLineHeight = 0;
this.setCoords();
},
/**
* @private
* @method _setBoundaries
*/
_setBoundaries: function(ctx, textLines) {
this._boundaries = [ ];
for (var i = 0, len = textLines.length; i < len; i++) {
var lineWidth = ctx.measureText(textLines[i]).width;
var lineLeftOffset = this._getLineLeftOffset(lineWidth);
this._boundaries.push({
height: this.fontSize,
width: lineWidth,
left: lineLeftOffset
});
}
},
/**
* @private
* @method _setTextStyles
*/
_setTextStyles: function(ctx) {
ctx.fillStyle = this.fill;
ctx.strokeStyle = this.strokeStyle;
ctx.lineWidth = this.strokeWidth;
ctx.textBaseline = 'alphabetic';
ctx.textAlign = this.textAlign;
ctx.font = this._getFontDeclaration();
},
/**
* @private
* @method _getTextHeight
*/
_getTextHeight: function(ctx, textLines) {
return this.fontSize * textLines.length * this.lineHeight;
},
/**
* @private
* @method _getTextWidth
*/
_getTextWidth: function(ctx, textLines) {
var maxWidth = ctx.measureText(textLines[0]).width;
for (var i = 1, len = textLines.length; i < len; i++) {
var currentLineWidth = ctx.measureText(textLines[i]).width;
if (currentLineWidth > maxWidth) {
maxWidth = currentLineWidth;
}
}
return maxWidth;
},
/**
* @private
* @method _setTextShadow
*/
_setTextShadow: function(ctx) {
if (this.textShadow) {
// "rgba(0,0,0,0.2) 2px 2px 10px"
// "rgb(0, 100, 0) 0 0 5px"
// "red 2px 2px 1px"
// "#f55 123 345 567"
var reOffsetsAndBlur = /\s+(-?\d+)(?:px)?\s+(-?\d+)(?:px)?\s+(\d+)(?:px)?\s*/;
var shadowDeclaration = this.textShadow;
var offsetsAndBlur = reOffsetsAndBlur.exec(this.textShadow);
var shadowColor = shadowDeclaration.replace(reOffsetsAndBlur, '');
ctx.save();
ctx.shadowColor = shadowColor;
ctx.shadowOffsetX = parseInt(offsetsAndBlur[1], 10);
ctx.shadowOffsetY = parseInt(offsetsAndBlur[2], 10);
ctx.shadowBlur = parseInt(offsetsAndBlur[3], 10);
this._shadows = [{
blur: ctx.shadowBlur,
color: ctx.shadowColor,
offX: ctx.shadowOffsetX,
offY: ctx.shadowOffsetY
}];
this._shadowOffsets = [[
parseInt(ctx.shadowOffsetX, 10), parseInt(ctx.shadowOffsetY, 10)
]];
}
},
_renderTextFill: function(ctx, textLines) {
this._boundaries = [ ];
for (var i = 0, len = textLines.length; i < len; i++) {
ctx.fillText(
textLines[i],
0,
i * this.fontSize * this.lineHeight
);
}
},
/**
* @private
* @method _renderTextStroke
*/
_renderTextStroke: function(ctx, textLines) {
if (this.strokeStyle) {
for (var i = 0, len = textLines.length; i < len; i++) {
ctx.strokeText(
textLines[i],
0,
i * this.fontSize * this.lineHeight
);
}
}
},
/**
* @private
* @_renderTextBackground
*/
_renderTextBackground: function(ctx, textLines) {
if (this.backgroundColor) {
ctx.save();
ctx.fillStyle = this.backgroundColor;
for (var i = 0, len = textLines.length; i < len; i++) {
var lineWidth = ctx.measureText(textLines[i]).width;
var lineLeftOffset = this._getLineLeftOffset(lineWidth);
ctx.fillRect(
0 + lineLeftOffset,
(i-1) * this.fontSize * this.lineHeight,
lineWidth,
this.fontSize * this.lineHeight
);
}
ctx.restore();
}
},
/**
* @private
* @method _getLineLeftOffset
*/
_getLineLeftOffset: function(lineWidth) {
if (this.textAlign === 'center') {
return (this.width - lineWidth) / 2;
}
if (this.textAlign === 'right') {
return this.width - lineWidth;
}
return 0;
},
/**
* @private
* @method _renderTextDecoration
*/
_renderTextDecoration: function(ctx, textLines) {
var halfOfVerticalBox = this._getTextHeight(ctx, textLines) / 2;
var _this = this;
function renderLinesAtOffset(offset) {
for (var i = 0, len = textLines.length; i < len; i++) {
var lineWidth = ctx.measureText(textLines[i]).width;
var lineLeftOffset = _this._getLineLeftOffset(lineWidth);
ctx.fillRect(
(-_this.width / 2) + lineLeftOffset,
(offset + (i * _this.fontSize * _this.lineHeight)) - halfOfVerticalBox,
lineWidth,
1);
}
}
if (this.textDecoration.indexOf('underline') > -1) {
renderLinesAtOffset(this.fontSize);
}
if (this.textDecoration.indexOf('line-through') > -1) {
renderLinesAtOffset(this.fontSize / 2);
}
if (this.textDecoration.indexOf('overline') > -1) {
renderLinesAtOffset(0);
}
},
/**
* @private
* @method _getFontDeclaration
*/
_getFontDeclaration: function() {
return [
this.fontStyle,
this.fontWeight,
this.fontSize + 'px',
(fabric.isLikelyNode ? ('"' + this.fontFamily + '"') : this.fontFamily)
].join(' ');
},
/**
* @private
* @method _initDummyElement
*/
_initDummyElementForCufon: function() {
var el = fabric.document.createElement('pre'),
container = fabric.document.createElement('div');
// Cufon doesn't play nice with textDecoration=underline if element doesn't have a parent
container.appendChild(el);
if (typeof G_vmlCanvasManager === 'undefined') {
el.innerHTML = this.text;
}
else {
// IE 7 & 8 drop newlines and white space on text nodes
// see: http://web.student.tuwien.ac.at/~e0226430/innerHtmlQuirk.html
// see: http://www.w3schools.com/dom/dom_mozilla_vs_ie.asp
el.innerText = this.text.replace(/\r?\n/gi, '\r');
}
el.style.fontSize = this.fontSize + 'px';
el.style.letterSpacing = 'normal';
return el;
},
/**
* Renders text instance on a specified context
* @method render
* @param ctx {CanvasRenderingContext2D} context to render on
*/
render: function(ctx, noTransform) {
ctx.save();
var m = this.transformMatrix;
if (this.group) {
ctx.translate(this.group.width/-2, this.group.height/-2);
}
if (m) {
ctx.transform(m[0], m[1], m[2], m[3], m[4], m[5]);
}
this._render(ctx);
if (!noTransform && this.active) {
this.drawBorders(ctx);
this.hideCorners || this.drawCorners(ctx);
}
ctx.restore();
},
/**
* Returns object representation of an instance
* @method toObject
* @return {Object} Object representation of text object
*/
toObject: function() {
return extend(this.callSuper('toObject'), {
text: this.text,
fontSize: this.fontSize,
fontWeight: this.fontWeight,
fontFamily: this.fontFamily,
fontStyle: this.fontStyle,
lineHeight: this.lineHeight,
textDecoration: this.textDecoration,
textShadow: this.textShadow,
textAlign: this.textAlign,
path: this.path,
strokeStyle: this.strokeStyle,
strokeWidth: this.strokeWidth,
backgroundColor: this.backgroundColor,
useNative: this.useNative
});
},
/**
* Returns svg representation of an instance
* @method toSVG
* @return {string} svg representation of an instance
*/
toSVG: function() {
var textLines = this.text.split(/\r?\n/),
lineTopOffset = this.useNative
? this.fontSize * this.lineHeight
: (-this._fontAscent - ((this._fontAscent / 5) * this.lineHeight)),
textLeftOffset = -(this.width/2),
textTopOffset = this.useNative
? this.fontSize - 1
: (this.height/2) - (textLines.length * this.fontSize) - this._totalLineHeight,
textAndBg = this._getSVGTextAndBg(lineTopOffset, textLeftOffset, textLines),
shadowSpans = this._getSVGShadows(lineTopOffset, textLines);
// move top offset by an ascent
textTopOffset += (this._fontAscent ? ((this._fontAscent / 5) * this.lineHeight) : 0);
return [
'',
textAndBg.textBgRects.join(''),
'',
shadowSpans.join(''),
textAndBg.textSpans.join(''),
'',
''
].join('');
},
_getSVGShadows: function(lineTopOffset, textLines) {
var shadowSpans = [], j, i, jlen, ilen, lineTopOffsetMultiplier = 1;
if (!this._shadows || !this._boundaries) {
return shadowSpans;
}
for (j = 0, jlen = this._shadows.length; j < jlen; j++) {
for (i = 0, ilen = textLines.length; i < ilen; i++) {
if (textLines[i] !== '') {
var lineLeftOffset = (this._boundaries && this._boundaries[i]) ? this._boundaries[i].left : 0;
shadowSpans.push(
'',
fabric.util.string.escapeXml(textLines[i]),
'');
lineTopOffsetMultiplier = 1;
} else {
// in some environments (e.g. IE 7 & 8) empty tspans are completely ignored, using a lineTopOffsetMultiplier
// prevents empty tspans
lineTopOffsetMultiplier++;
}
}
}
return shadowSpans;
},
_getSVGTextAndBg: function(lineTopOffset, textLeftOffset, textLines) {
var textSpans = [ ], textBgRects = [ ], i, lineLeftOffset, len, lineTopOffsetMultiplier = 1;
// text and background
for (i = 0, len = textLines.length; i < len; i++) {
if (textLines[i] !== '') {
lineLeftOffset = (this._boundaries && this._boundaries[i]) ? toFixed(this._boundaries[i].left, 2) : 0;
textSpans.push(
' elements since setting opacity on containing one doesn't work in Illustrator
this._getFillAttributes(this.fill), '>',
fabric.util.string.escapeXml(textLines[i]),
''
);
lineTopOffsetMultiplier = 1;
} else {
// in some environments (e.g. IE 7 & 8) empty tspans are completely ignored, using a lineTopOffsetMultiplier
// prevents empty tspans
lineTopOffsetMultiplier++;
}
if (!this.backgroundColor || !this._boundaries) continue;
textBgRects.push(
'');
}
return {
textSpans: textSpans,
textBgRects: textBgRects
};
},
// 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
_getFillAttributes: function(value) {
var fillColor = value ? new fabric.Color(value) : '';
if (!fillColor || !fillColor.getSource() || fillColor.getAlpha() === 1) {
return 'fill="' + value + '"';
}
return 'opacity="' + fillColor.getAlpha() + '" fill="' + fillColor.setAlpha(1).toRgb() + '"';
},
/**
* Sets "color" of an instance (alias of `set('fill', …)`)
* @method setColor
* @param {String} value
* @return {fabric.Text} thisArg
* @chainable
*/
setColor: function(value) {
this.set('fill', value);
return this;
},
/**
* Sets fontSize of an instance and updates its coordinates
* @method setFontsize
* @param {Number} value
* @return {fabric.Text} thisArg
* @chainable
*/
setFontsize: function(value) {
this.set('fontSize', value);
this._initDimensions();
this.setCoords();
return this;
},
/**
* Returns actual text value of an instance
* @method getText
* @return {String}
*/
getText: function() {
return this.text;
},
/**
* Sets text of an instance, and updates its coordinates
* @method setText
* @param {String} value
* @return {fabric.Text} thisArg
* @chainable
*/
setText: function(value) {
this.set('text', value);
this._initDimensions();
this.setCoords();
return this;
},
/**
* Sets specified property to a specified value
* @method set
* @param {String} name
* @param {Any} value
* @return {fabric.Text} thisArg
* @chainable
*/
_set: function(name, value) {
if (name === 'fontFamily' && this.path) {
this.path = this.path.replace(/(.*?)([^\/]*)(\.font\.js)/, '$1' + value + '$3');
}
this.callSuper('_set', name, value);
}
});
/**
* List of attribute names to account for when parsing SVG element (used by `fabric.Text.fromElement`)
* @static
*/
fabric.Text.ATTRIBUTE_NAMES =
('x y fill fill-opacity opacity stroke stroke-width transform ' +
'font-family font-style font-weight font-size text-decoration text-anchor').split(' ');
/**
* Returns fabric.Text instance from an object representation
* @static
* @method fromObject
* @param {Object} object to create an instance from
* @return {fabric.Text} an instance
*/
fabric.Text.fromObject = function(object) {
return new fabric.Text(object.text, clone(object));
};
/**
* Returns fabric.Text instance from an SVG element (not yet implemented)
* @static
* @method fabric.Text.fromElement
* @param element
* @param options
* @return {fabric.Text} an instance
*/
fabric.Text.fromElement = function(element, options) {
if (!element) {
return null;
}
var parsedAttributes = fabric.parseAttributes(element, fabric.Text.ATTRIBUTE_NAMES);
options = fabric.util.object.extend((options ? fabric.util.object.clone(options) : { }), parsedAttributes);
// convert svg alignment to canvas alignment
var map = {start:'left', middle:'center', end:'right'};
if(options['text-anchor']){
options.textAlign = map[options['text-anchor']];
delete options['text-anchor']
}
var text = new fabric.Text(element.textContent, options);
return text;
};
})(typeof exports !== 'undefined' ? exports : this);
(function() {
if (typeof document !== 'undefined' && typeof window !== 'undefined') {
return;
}
var DOMParser = new require('xmldom').DOMParser,
URL = require('url'),
HTTP = require('http'),
Canvas = require('canvas'),
Image = require('canvas').Image;
function request(url, encoding, callback) {
var oURL = URL.parse(url),
client = HTTP.createClient(oURL.port, oURL.hostname),
req = client.request('GET', oURL.pathname, { 'host': oURL.hostname });
client.addListener('error', function(err) {
if (err.errno === process.ECONNREFUSED) {
fabric.log('ECONNREFUSED: connection refused to ' + client.host + ':' + client.port);
}
else {
fabric.log(err.message);
}
});
req.end();
req.on('response', function (response) {
var body = "";
if (encoding) {
response.setEncoding(encoding);
}
response.on('end', function () {
callback(body);
});
response.on('data', function (chunk) {
if (response.statusCode === 200) {
body += chunk;
}
});
});
}
fabric.util.loadImage = function(url, callback) {
request(url, 'binary', function(body) {
var img = new Image();
img.src = new Buffer(body, 'binary');
// preserving original url, which seems to be lost in node-canvas
img._src = url;
callback(img);
});
};
fabric.loadSVGFromURL = function(url, callback) {
url = url.replace(/^\n\s*/, '').replace(/\?.*$/, '').trim();
request(url, '', function(body) {
fabric.loadSVGFromString(body, callback);
});
};
fabric.loadSVGFromString = function(string, callback) {
var doc = new DOMParser().parseFromString(string);
fabric.parseSVGDocument(doc.documentElement, function(results, options) {
callback(results, options);
});
};
fabric.util.getScript = function(url, callback) {
request(url, '', function(body) {
eval(body);
callback && callback();
});
};
fabric.Image.fromObject = function(object, callback) {
fabric.util.loadImage(object.src, function(img) {
var oImg = new fabric.Image(img);
oImg._initConfig(object);
oImg._initFilters(object);
callback(oImg);
});
};
/**
* Only available when running fabric on node.js
* @method createCanvasForNode
* @param width Canvas width
* @param height Canvas height
* @return {Object} wrapped canvas instance
*/
fabric.createCanvasForNode = function(width, height) {
var canvasEl = fabric.document.createElement('canvas'),
nodeCanvas = new Canvas(width || 600, height || 600);
// jsdom doesn't create style on canvas element, so here be temp. workaround
canvasEl.style = { };
canvasEl.width = nodeCanvas.width;
canvasEl.height = nodeCanvas.height;
var FabricCanvas = fabric.Canvas || fabric.StaticCanvas;
var fabricCanvas = new FabricCanvas(canvasEl);
fabricCanvas.contextContainer = nodeCanvas.getContext('2d');
fabricCanvas.nodeCanvas = nodeCanvas;
return fabricCanvas;
};
fabric.StaticCanvas.prototype.createPNGStream = function() {
return this.nodeCanvas.createPNGStream();
};
var origSetWidth = fabric.StaticCanvas.prototype.setWidth;
fabric.StaticCanvas.prototype.setWidth = function(width) {
origSetWidth.call(this);
this.nodeCanvas.width = width;
return this;
};
if (fabric.Canvas) {
fabric.Canvas.prototype.setWidth = fabric.StaticCanvas.prototype.setWidth;
}
var origSetHeight = fabric.StaticCanvas.prototype.setHeight;
fabric.StaticCanvas.prototype.setHeight = function(height) {
origSetHeight.call(this);
this.nodeCanvas.height = height;
return this;
};
if (fabric.Canvas) {
fabric.Canvas.prototype.setHeight = fabric.StaticCanvas.prototype.setHeight;
}
})();