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egfx/anigif.js

Created July 20, 2018 04:52
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anigif.js
/* anigif/jsgif/GIFEncoder_WebWorker.js */
GIFEncoder_WebWorker = function(options) {
var exports = {}
var init = exports.init = function init() {
this.repeat = 0
this.delay = 250
this.frames = []
this.num_threads = 8
this.base_url = options.base_url
}
var setRepeat = exports.setRepeat = function setRepeat(repeat) {
this.repeat = repeat
}
var setDelay = exports.setDelay = function setDelay(delay) {
this.delay = delay
}
var setThreads = exports.setThreads = function setThreads(num_threads) {
this.num_threads = num_threads
}
var addFrame = exports.addFrame = function addFrame(im/*BitmapData*/, is_imageData)/*Boolean*/ {
this.frames.push(im)
return true;
}
var start = exports.start = function start() {
return true;
}
var finish_sync = exports.finish_sync = function finish_sync(cba) {
var encoder = new window.GIFEncoder();
encoder.setRepeat(this.repeat); //auto-loop
encoder.setDelay(this.delay);
encoder.start();
for (var i=0; i<this.frames.length; i++) {
encoder.addFrame(this.frames[i]);
}
encoder.finish();
cba(null, encoder.stream().getData())
}
var finish_async_internal = exports.finish_async_internal = function finish_async_internal(url, singleCompleteEvent, cba) {
var animation_parts = new Array(this.frames.length);
console.log("threads: " + this.num_threads)
var crew = new WorkCrew(url, this.num_threads);
crew.oncomplete = function(result) {
if (singleCompleteEvent) singleCompleteEvent()
//console.log("done: " + result.id)
animation_parts[result.id] = result.result.data;
};
crew.onfinish = function() {
crew.clean();
var res = animation_parts.join('')
cba(null, res)
};
for (var j=0; j<this.frames.length; j++) {
var curr = this.frames[j]
var imdata = curr.getImageData(0,0,curr.canvas.width, curr.canvas.height)
var len = curr.canvas.width * curr.canvas.height * 4;
var msg = {
frame_index: j,
frame_length: this.frames.length,
height: curr.canvas.height,
width: curr.canvas.width,
repeat: this.repeat,
delay: this.delay,
imageData: imdata.data.buffer//imarray.join(',')
}
window.x = curr
window.y = imdata
crew.addWork(msg);
//console.log("addWork");
}
}
function downloadString(url, cba) {
var xmlHttp = new XMLHttpRequest();
xmlHttp.onreadystatechange = function() {
if (xmlHttp.readyState == 4) {
cba(xmlHttp.status == 200?null:xmlHttp.status, xmlHttp.responseText)
}
}
xmlHttp.open( "GET", url, true );
xmlHttp.send( null );
}
var finish_async = exports.finish_async = function finish_async(opt) {
var self = this
var url = self.base_url + 'worker.js';
downloadString(self.base_url + 'worker.js', function(err, content) {
var content_working = "var base_url_injected='" + self.base_url + "';\r\n" + content;
var blob = new Blob([content_working], {type: "text/javascript"})
var url = null;
if (window.webkitURL) url = window.webkitURL.createObjectURL(blob)
else url = window.URL.createObjectURL(blob)
self.finish_async_internal(url, opt.singleComplete, function(err, res) {
opt.done(null, res);
})
})
}
exports.init()
return exports;
}
/* anigif/jsgif/workcrew.js */
/*
WorkCrew - a WebWorker work queue library
Usage:
// Create an 8 worker pool using worker.js.
var crew = new WorkCrew('worker.js', 8);
// Do something whenever a job is completed.
// The result object structure is
// {
// id: work unit ID,
// result: message received from worker
// }
crew.oncomplete = function(result) {
console.log(result.id, result.result);
};
// Add some work to the queue.
// The work unit is postMessaged to one of
// the workers.
var workId = crew.addWork(myWorkUnit);
// Add an onfinish event handler.
// Fired when the queue is empty and all workers
// are free.
crew.onfinish = function() {
console.log('All work in queue finished!');
};
*/
WorkCrew = function(filename, count) {
this.filename = filename;
this.count = count || 4;
this.queue = [];
this.results = [];
this.pool = [];
this.working = {};
this.uuid = 0;
this.fillPool();
};
WorkCrew.prototype.onfinish = function() {};
WorkCrew.prototype.oncomplete = function(res) {
return [res.id, res.result];
};
WorkCrew.prototype.addWork = function(work) {
var id = this.uuid++;
this.queue.push({id: id, work: work});
this.processQueue();
return id;
};
WorkCrew.prototype.processQueue = function() {
if (this.queue.length == 0 && this.pool.length == this.count) {
if (this.onfinish)
this.onfinish();
} else {
while (this.queue.length > 0 && this.pool.length > 0) {
var unit = this.queue.shift();
var worker = this.pool.shift();
worker.id = unit.id;
this.working[worker.id] = worker;
//*TODO pass transferable object in a generic way...
worker.postMessage(unit.work, [unit.work.imageData]);
}
}
};
WorkCrew.prototype.addWorker = function() {
var w = new Worker(this.filename);
var self = this;
w.onmessage = function(res) {
var id = this.id;
delete self.working[this.id];
this.id = null;
self.pool.push(this);
try {
self.oncomplete({id: id, result: res});
} catch(e) {
console.log(e);
}
self.processQueue();
};
this.pool.push(w);
};
WorkCrew.prototype.fillPool = function() {
for (var i=0; i<this.count; i++) {
this.addWorker();
}
};
WorkCrew.prototype.clean = function() {
while (this.pool.length > 0) {
var worker = this.pool.shift()
worker.terminate()
}
this.queue = [];
this.results = [];
this.pool = [];
this.working = {};
};
/* anigif/anigif.js */
(function(window, document) {
"use strict";
window.anigif = {
initOnce: function() {
this.progressSink = null;
this.options = {
onlyLastFrames: 300,
framesPerSecond: 10,
selector: "#main",
cores: 8,
ratio: 1,
quality: "Medium",
base_url: "",
fixedWidth: "",
period: "Online"
};
this.init()
},
init: function() {
this.frames = [];
this.totalFrames = 0;
this.renderedFrames = 0;
this.composedFrames = 0;
this.canvasOnly = false;
this.images = [];
this.el = null;
//this._log = "";
this.continue = true;
},
progress: function(str) {
if (this.progressSink) this.progressSink(str)
},
log: function(str) {
//console.log(str);
//this._log += str + "\r\n";
},
startRecord: function() {
this.init();
this.el = document.querySelectorAll(this.options.selector)[0];
if (!this.el) {
throw new Error("Could not find an element with CSS selector '"+this.options.selector+"'. Please set 'element to record' setting to a selector of an existing element.")
}
this.canvasOnly = this.el.tagName=="CANVAS"
console.log("canvas only: " + this.canvasOnly)
this.recordFrame();
},
recordFrame: function() {
var self = this;
if (!this.continue) return;
if (this.options.period=="Offline") {
this.frames.push(this.cloneDom(this.el));
if (this.frames.length>this.options.onlyLastFrames) {
this.frames.shift()
}
this.progress(++this.totalFrames + " frames")
}
else if (this.options.period=="Online") {
self.getCurrentImage(function(err, img) {
if (!self.continue) return;
self.images.push(img)
if (self.images.length>self.options.onlyLastFrames) {
self.images.shift()
}
self.progress(++self.totalFrames + " frames")
});
}
window.setTimeout(function() {
self.recordFrame(this.options);
}, 1000/this.options.framesPerSecond);
},
getCurrentImage: function(cba) {
var self = this
if (this.canvasOnly) {
self.resizeImage(self.cloneCanvas(self.el), self.options.ratio, function(err, canvas_small) {
cba(null, canvas_small);
})
}
else
window.html2canvas( [ self.el ], {
onrendered: function(canvas) {
self.resizeImage(canvas, self.options.ratio, function(err, canvas_small) {
cba(null, canvas_small);
})
}
});
},
cloneDom: function(el) {
var clone;
if (this.canvasOnly) {
clone = this.cloneCanvas(el);
}
else {
clone = el.cloneNode(true);
var sourceCanvas = el.getElementsByTagName("canvas");
var cloneCanvas = clone.getElementsByTagName("canvas");
for (var i=0; i< sourceCanvas.length; i++) {
var newCanvas = this.cloneCanvas(sourceCanvas[i])
cloneCanvas[i].parentElement.replaceChild(newCanvas, cloneCanvas[i])
}
var sourceVideos = el.getElementsByTagName("video");
var cloneVideos = clone.getElementsByTagName("video");
for (var i=0; i< sourceVideos.length; i++) {
var videoCanvas = this.getVideoCanvas(sourceVideos[i])
cloneVideos[i].parentElement.replaceChild(videoCanvas, cloneVideos[i])
//document.body.appendChild(videoCanvas);
}
}
clone.id="unique___"+el.id;
return clone;
},
getVideoCanvas: function(video) {
var canvas = document.createElement("canvas");
//try width/geigh -30? here and bellow
canvas.width = video.clientWidth;
canvas.height = video.clientHeight;
var ctx = canvas.getContext('2d');
ctx.drawImage(video,0,0,video.clientWidth,video.clientHeight);
return canvas;
},
cloneCanvas: function(oldCanvas) {
//create a new canvas
var newCanvas = document.createElement('canvas');
var context = newCanvas.getContext('2d');
//set dimensions
newCanvas.width = oldCanvas.width;
newCanvas.height = oldCanvas.height;
//apply the old canvas to the new one
context.drawImage(oldCanvas, 0, 0);
//return the new canvas
return newCanvas;
},
stopRecord: function(cba) {
var self = this;
this.continue = false;
if (this.options.period=="Offline") {
async.timesSeries(this.frames.length, self.renderImage.bind(self), function(err){
self.composeAnimatedGif(function(err) {
cba();
});
});
}
else if (this.options.period=="Online") {
self.composeAnimatedGif(function(err) {
cba();
});
}
},
renderImage: function(i, cbx) {
var self = this;
if (this.options.fixedWidth!="") {
this.frames[i].style.width=this.options.fixedWidth + "px";
}
var handleImage = function(canvas) {
self.resizeImage(canvas, self.options.ratio, function(err, canvas_small) {
self.progress("rendered " + ++self.renderedFrames + "/" + self.frames.length)
self.images.push(canvas_small);
cbx()
})
}
if (self.canvasOnly) {
handleImage(self.frames[i])
}
else {
document.body.appendChild(this.frames[i]);
this.replaceSvgWithCanvas(this.frames[i]);
window.html2canvas( [ self.frames[i] ], {
onrendered: function(canvas) {
handleImage(canvas);
self.frames[i].parentElement.removeChild(self.frames[i]);
}
});
}
},
resizeImage: function(canvas, ratio, cba) {
var self = this
if (ratio==1) {
cba(null, canvas);
return;
}
var context = canvas.getContext("2d")
var canvas2 = document.createElement("canvas")
var context2 = canvas2.getContext("2d")
canvas2.width = canvas.width*ratio
canvas2.height = canvas.height*ratio
var img = new Image();
if (self.options.quality=="High")
img.src = canvas.toDataURL("image/png");
else if (self.options.quality=="Medium")
img.src = canvas.toDataURL("image/jpeg", 0.9);
else img.src = canvas.toDataURL("image/jpeg", 0.1);
img.onload = function() {
context2.drawImage(img, 0, 0, canvas.width, canvas.height, 0, 0, canvas2.width, canvas2.height)
cba(null, canvas2)
}
},
replaceSvgWithCanvas: function(el) {
var self = this;
var serializer = new XMLSerializer();
var svgs = el.querySelectorAll("svg")
for (var i=0; i<svgs.length; i++) {
var str = serializer.serializeToString(svgs[i]);
var canvasEl = document.createElement("canvas");
canvasEl.id="canvas"+i;
svgs[i].parentElement.replaceChild(canvasEl, svgs[i]);
self.buildCanvasFromSvg(i, canvasEl, str, null);
}
},
buildCanvasFromSvg: function(id, canvasEl, svgstr, cba) {
var canvas;
fabric.loadSVGFromString(svgstr, function(objects, options) {
var shape = fabric.util.groupSVGElements(objects, options);
canvasEl.width = shape.width || 600;
canvasEl.height = shape.height || 600;
canvas = new fabric.StaticCanvas('canvas'+id, { backgroundColor: '#fff' });
canvas.add(shape);
shape.center();
canvas.renderAll();
if (cba) cba(null, canvas);
});
},
composeAnimatedGif: function(cba) {
var self = this
//console.log("starting gif composition")
var encoder = new window.GIFEncoder_WebWorker({base_url: self.options.base_url+"jsgif/"});
encoder.setRepeat(0); //auto-loop
encoder.setDelay(1000/this.options.framesPerSecond);
encoder.setThreads(this.options.cores)
encoder.start();
for (var i=0; i<this.images.length; i++) {
var context = this.images[i].getContext('2d');
encoder.addFrame(context);
}
var singleComplete = function() {
self.progress("composed " + ++self.composedFrames + "/" + self.images.length)
}
var done = function(err, data){
self.log("final: ");
//this.img = 'data:image/gif;base64,' + window.encode64(encoder.stream().getData())
//self.img64 = 'data:image/gif;base64,' + window.encode64(data)
self.img = window.getObjURL(data, "image/gif")
self.log(self.img);
cba(null)
}
self.progress("composed 0/" + self.images.length)
encoder.finish_async({singleComplete: singleComplete, done: done});
}
};
window.anigif.initOnce();
//need to use this WA since getDataURL() can crash the browser (wehn trying to view the url, not when creating it)
window.getObjURL = function(binStr, type) {
//take apart data URL
//var parts = canvas.toDataURL().match(/data:([^;]*)(;base64)?,([0-9A-Za-z+/]+)/);
//assume base64 encoding
//var binStr = atob(parts[3]);
//convert to binary in ArrayBuffer
var buf = new ArrayBuffer(binStr.length);
var view = new Uint8Array(buf);
for(var i = 0; i < view.length; i++)
view[i] = binStr.charCodeAt(i);
var blob = new Blob([view], {'type': type});
var url;
if (window.webkitURL) url = window.webkitURL.createObjectURL(blob)
else url = window.URL.createObjectURL(blob)
return url;
}
window.encode64 = function(input) {
var output = "", i = 0, l = input.length,
key = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
chr1, chr2, chr3, enc1, enc2, enc3, enc4;
while (i < l) {
chr1 = input.charCodeAt(i++);
chr2 = input.charCodeAt(i++);
chr3 = input.charCodeAt(i++);
enc1 = chr1 >> 2;
enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
enc4 = chr3 & 63;
if (isNaN(chr2)) enc3 = enc4 = 64;
else if (isNaN(chr3)) enc4 = 64;
output = output + key.charAt(enc1) + key.charAt(enc2) + key.charAt(enc3) + key.charAt(enc4);
}
return output;
}
})(window, document);
/* anigif/bar.js */
(function(window, document){
window.anigif_bar = {
resolve_mode: typeof(anigif_base_url)=="undefined"?"absolute_from_root":"absolute_from_remote",
base_url: typeof(anigif_base_url)=="undefined"?getAbsoluteUrlPrefix() + "anigif/":anigif_base_url,
record_delay: 3,
buttons: ["record", "stop", "play", "config"],
install: function() {
var self = this;
//document.querySelectorAll("[koo=zoo]")[0].src
window.anigif.options.base_url = self.base_url
this.downloadHtml(self.base_url + "bar.html", function(err, html) {
var div = document.createElement("div");
div.id = "anigif_wrapper";
div.style.position = "fixed";
div.style.right = self.right || "5%";
div.style.top = self.top || "5%";
div.style.zIndex=99999
var htmlworking = self.applyBaseUrl(html)
div.innerHTML = htmlworking;
document.body.appendChild(div)
//prevant global page hooks from hapenning when interacting with anigif
var preventBubble = function(e) {
e.stopPropagation();
}
div.addEventListener("keydown", preventBubble);
div.addEventListener("keypress", preventBubble);
div.addEventListener("mousedown", preventBubble)
self.init(div);
})
window.anigif.progressSink = function(msg) {
self.status(msg)
}
},
applyBaseUrl: function(divstr) {
return divstr.replace(/src="/g, 'src="'+this.base_url);
},
downloadHtml: function(url, cba) {
var xmlHttp = new XMLHttpRequest();
xmlHttp.onreadystatechange = function() {
//window.x = xmlHttp;
if (xmlHttp.readyState == 4) {
cba(xmlHttp.status == 200?null:xmlHttp.status, xmlHttp.responseText)
}
}
xmlHttp.open( "GET", url, true );
xmlHttp.send( null );
},
init: function(el) {
var self = this;
this.el = el
this.setEnabled({record: true, stop: false, play: false, config: true})
this.status("ready")
for (var i=0; i<self.buttons.length; i++) {
this.el.querySelectorAll("#"+self.buttons[i])[0].onclick = function(e) {
var target = e.target || e.srcElement;
if (target.className=="disabled") return;
self.click(e);
};
}
this.loadConfig();
},
loadConfig: function() {
this.el.querySelectorAll("#cores")[0].value = window.anigif.options.cores;
this.el.querySelectorAll("#onlyLastFrames")[0].value = window.anigif.options.onlyLastFrames;
this.el.querySelectorAll("#framesPerSecond")[0].value = window.anigif.options.framesPerSecond;
this.el.querySelectorAll("#rootNode")[0].value = window.anigif.options.selector;
this.el.querySelectorAll("#ratio")[0].value = window.anigif.options.ratio;
this.el.querySelectorAll("#quality")[0].value = window.anigif.options.quality;
this.el.querySelectorAll("#period")[0].value = window.anigif.options.period;
this.el.querySelectorAll("#fixedWidth")[0].value = window.anigif.options.fixedWidth;
},
saveConfig: function() {
window.anigif.options.cores = this.el.querySelectorAll("#cores")[0].value;
window.anigif.options.onlyLastFrames = this.el.querySelectorAll("#onlyLastFrames")[0].value;
window.anigif.options.framesPerSecond = this.el.querySelectorAll("#framesPerSecond")[0].value;
window.anigif.options.selector = this.el.querySelectorAll("#rootNode")[0].value;
window.anigif.options.ratio = this.el.querySelectorAll("#ratio")[0].value;
window.anigif.options.quality = this.el.querySelectorAll("#quality")[0].value;
window.anigif.options.period = this.el.querySelectorAll("#period")[0].value;
window.anigif.options.fixedWidth = this.el.querySelectorAll("#fixedWidth")[0].value;
},
click: function(e) {
var source = e.target || e.srcElement;
this[source.id](e.target)
},
closeConfig: function() {
this.el.querySelectorAll("#anigif_settings")[0].style.display = "none"
},
config: function(el) {
var style = this.el.querySelectorAll("#anigif_settings")[0].style;
if (style.display=="block") {
this.saveConfig();
style.display = "none";
}
else {
style.display = "block"
}
},
record: function(el) {
var self = this;
this.checkBrowser();
this.setEnabled({record: false, stop: true, play: false, config: false})
this.count(self.record_delay, function() {
el.className = "blink"
self.status("recording...")
try {
window.anigif.startRecord();
}
catch (e) {
alert(e)
self.init(self.el)
}
})
},
checkBrowser: function() {
var isOpera = !!window.opera || navigator.userAgent.indexOf(' OPR/') >= 0;
// Opera 8.0+ (UA detection to detect Blink/v8-powered Opera)
var isFirefox = typeof InstallTrigger !== 'undefined'; // Firefox 1.0+
var isSafari = Object.prototype.toString.call(window.HTMLElement).indexOf('Constructor') > 0;
// At least Safari 3+: "[object HTMLElementConstructor]"
var isChrome = !!window.chrome && !isOpera; // Chrome 1+
var isIE = /*@cc_on!@*/false || document.documentMode; // At least IE6
if (!isChrome & !isFirefox & !isSafari) {
alert("Gifw00t! has been tested on Chrome, Firefox and Safari only and may not work on your browser")
}
},
count: function(seconds, cba) {
var self = this;
if (seconds==0) cba();
else {
self.status("starting in " + seconds + "...");
window.setTimeout(function() {self.count(seconds-1, cba)}, 1000);
}
},
stop: function(el) {
var self = this;
this.status("processing...")
self.el.querySelectorAll("#record")[0].className = "";
self.setEnabled({record: false, stop: false, play: false, config: false})
document.body.style.cursor = "wait";
//timeout - give the browser a chance to update the cusror
window.setTimeout(function() {self.stopInternal()}, 5);
},
stopInternal: function() {
var start = new Date().getTime();
var self = this;
window.anigif.stopRecord(function() {
var end = new Date().getTime();
var time = end - start;
console.log("duration: " + time)
self.status("please wait (" + (time/1000).toFixed(2) + "s)");
document.getElementById("record").classList.add("disabled");
document.body.style.cursor = "default";
self.setEnabled({record: true, stop: false, play: true, config: true})
})
},
play: function(el) {
var win=window.open(window.anigif.img, '_blank');
win.focus();
},
setEnabled: function(settings) {
for (var b in settings) {
if (!settings.hasOwnProperty(b)) continue;
this.el.querySelectorAll("#"+b)[0].className = settings[b]?"enabled":"disabled";
}
},
status: function(txt) {
this.el.querySelectorAll("#status")[0].textContent = txt
}
}
function getAbsoluteUrlPrefix() {
var el = document.createElement('span');
el.innerHTML = '<a href=".">&nbsp;</a>';
return el.firstChild.href;
}
function install() {
window.anigif_bar.install();
}
if (document.readyState === 'complete') {
install()
}
else {
if(window.addEventListener){
window.addEventListener('load',install,false); //W3C
}
else{
window.attachEvent('onload',install); //IE
}
}
})(window,document);
/* html2canvas/build/html2canvas.js */
/*
html2canvas 0.4.0 <http://html2canvas.hertzen.com>
Copyright (c) 2014 Niklas von Hertzen (@niklasvh)
Released under MIT License
*/
(function(window, document, undefined){
"use strict";
var _html2canvas = {},
previousElement,
computedCSS,
html2canvas;
function h2clog(a) {
if (_html2canvas.logging && window.console && window.console.log) {
window.console.log(a);
}
}
_html2canvas.Util = {};
_html2canvas.Util.trimText = (function(isNative){
return function(input){
if(isNative) { return isNative.apply( input ); }
else { return ((input || '') + '').replace( /^\s+|\s+$/g , '' ); }
};
})( String.prototype.trim );
_html2canvas.Util.parseBackgroundImage = function (value) {
var whitespace = ' \r\n\t',
method, definition, prefix, prefix_i, block, results = [],
c, mode = 0, numParen = 0, quote, args;
var appendResult = function(){
if(method) {
if(definition.substr( 0, 1 ) === '"') {
definition = definition.substr( 1, definition.length - 2 );
}
if(definition) {
args.push(definition);
}
if(method.substr( 0, 1 ) === '-' &&
(prefix_i = method.indexOf( '-', 1 ) + 1) > 0) {
prefix = method.substr( 0, prefix_i);
method = method.substr( prefix_i );
}
results.push({
prefix: prefix,
method: method.toLowerCase(),
value: block,
args: args
});
}
args = []; //for some odd reason, setting .length = 0 didn't work in safari
method =
prefix =
definition =
block = '';
};
appendResult();
for(var i = 0, ii = value.length; i<ii; i++) {
c = value[i];
if(mode === 0 && whitespace.indexOf( c ) > -1){
continue;
}
switch(c) {
case '"':
if(!quote) {
quote = c;
}
else if(quote === c) {
quote = null;
}
break;
case '(':
if(quote) { break; }
else if(mode === 0) {
mode = 1;
block += c;
continue;
} else {
numParen++;
}
break;
case ')':
if(quote) { break; }
else if(mode === 1) {
if(numParen === 0) {
mode = 0;
block += c;
appendResult();
continue;
} else {
numParen--;
}
}
break;
case ',':
if(quote) { break; }
else if(mode === 0) {
appendResult();
continue;
}
else if (mode === 1) {
if(numParen === 0 && !method.match(/^url$/i)) {
args.push(definition);
definition = '';
block += c;
continue;
}
}
break;
}
block += c;
if(mode === 0) { method += c; }
else { definition += c; }
}
appendResult();
return results;
};
_html2canvas.Util.Bounds = function getBounds (el) {
var clientRect,
bounds = {};
if (el.getBoundingClientRect){
clientRect = el.getBoundingClientRect();
// TODO add scroll position to bounds, so no scrolling of window necessary
bounds.top = clientRect.top;
bounds.bottom = clientRect.bottom || (clientRect.top + clientRect.height);
bounds.left = clientRect.left;
// older IE doesn't have width/height, but top/bottom instead
bounds.width = clientRect.width || (clientRect.right - clientRect.left);
bounds.height = clientRect.height || (clientRect.bottom - clientRect.top);
return bounds;
}
};
_html2canvas.Util.getCSS = function (el, attribute, index) {
// return $(el).css(attribute);
var val,
isBackgroundSizePosition = attribute.match( /^background(Size|Position)$/ );
function toPX( attribute, val ) {
var rsLeft = el.runtimeStyle && el.runtimeStyle[ attribute ],
left,
style = el.style;
// Check if we are not dealing with pixels, (Opera has issues with this)
// Ported from jQuery css.js
// From the awesome hack by Dean Edwards
// http://erik.eae.net/archives/2007/07/27/18.54.15/#comment-102291
// If we're not dealing with a regular pixel number
// but a number that has a weird ending, we need to convert it to pixels
if ( !/^-?[0-9]+\.?[0-9]*(?:px)?$/i.test( val ) && /^-?\d/.test( val ) ) {
// Remember the original values
left = style.left;
// Put in the new values to get a computed value out
if ( rsLeft ) {
el.runtimeStyle.left = el.currentStyle.left;
}
style.left = attribute === "fontSize" ? "1em" : (val || 0);
val = style.pixelLeft + "px";
// Revert the changed values
style.left = left;
if ( rsLeft ) {
el.runtimeStyle.left = rsLeft;
}
}
if (!/^(thin|medium|thick)$/i.test( val )) {
return Math.round(parseFloat( val )) + "px";
}
return val;
}
if (previousElement !== el) {
computedCSS = document.defaultView.getComputedStyle(el, null);
}
val = computedCSS[attribute];
if (isBackgroundSizePosition) {
val = (val || '').split( ',' );
val = val[index || 0] || val[0] || 'auto';
val = _html2canvas.Util.trimText(val).split(' ');
if(attribute === 'backgroundSize' && (!val[ 0 ] || val[ 0 ].match( /cover|contain|auto/ ))) {
//these values will be handled in the parent function
} else {
val[ 0 ] = ( val[ 0 ].indexOf( "%" ) === -1 ) ? toPX( attribute + "X", val[ 0 ] ) : val[ 0 ];
if(val[ 1 ] === undefined) {
if(attribute === 'backgroundSize') {
val[ 1 ] = 'auto';
return val;
}
else {
// IE 9 doesn't return double digit always
val[ 1 ] = val[ 0 ];
}
}
val[ 1 ] = ( val[ 1 ].indexOf( "%" ) === -1 ) ? toPX( attribute + "Y", val[ 1 ] ) : val[ 1 ];
}
} else if ( /border(Top|Bottom)(Left|Right)Radius/.test( attribute) ) {
var arr = val.split(" ");
if ( arr.length <= 1 ) {
arr[ 1 ] = arr[ 0 ];
}
arr[ 0 ] = parseInt( arr[ 0 ], 10 );
arr[ 1 ] = parseInt( arr[ 1 ], 10 );
val = arr;
}
return val;
};
_html2canvas.Util.resizeBounds = function( current_width, current_height, target_width, target_height, stretch_mode ){
var target_ratio = target_width / target_height,
current_ratio = current_width / current_height,
output_width, output_height;
if(!stretch_mode || stretch_mode === 'auto') {
output_width = target_width;
output_height = target_height;
} else {
if(target_ratio < current_ratio ^ stretch_mode === 'contain') {
output_height = target_height;
output_width = target_height * current_ratio;
} else {
output_width = target_width;
output_height = target_width / current_ratio;
}
}
return { width: output_width, height: output_height };
};
function backgroundBoundsFactory( prop, el, bounds, image, imageIndex, backgroundSize ) {
var bgposition = _html2canvas.Util.getCSS( el, prop, imageIndex ) ,
topPos,
left,
percentage,
val;
if (bgposition.length === 1){
val = bgposition[0];
bgposition = [];
bgposition[0] = val;
bgposition[1] = val;
}
if (bgposition[0].toString().indexOf("%") !== -1){
percentage = (parseFloat(bgposition[0])/100);
left = bounds.width * percentage;
if(prop !== 'backgroundSize') {
left -= (backgroundSize || image).width*percentage;
}
} else {
if(prop === 'backgroundSize') {
if(bgposition[0] === 'auto') {
left = image.width;
} else {
if(bgposition[0].match(/contain|cover/)) {
var resized = _html2canvas.Util.resizeBounds( image.width, image.height, bounds.width, bounds.height, bgposition[0] );
left = resized.width;
topPos = resized.height;
} else {
left = parseInt (bgposition[0], 10 );
}
}
} else {
left = parseInt( bgposition[0], 10 );
}
}
if(bgposition[1] === 'auto') {
topPos = left / image.width * image.height;
} else if (bgposition[1].toString().indexOf("%") !== -1){
percentage = (parseFloat(bgposition[1])/100);
topPos = bounds.height * percentage;
if(prop !== 'backgroundSize') {
topPos -= (backgroundSize || image).height * percentage;
}
} else {
topPos = parseInt(bgposition[1],10);
}
return [left, topPos];
}
_html2canvas.Util.BackgroundPosition = function( el, bounds, image, imageIndex, backgroundSize ) {
var result = backgroundBoundsFactory( 'backgroundPosition', el, bounds, image, imageIndex, backgroundSize );
return { left: result[0], top: result[1] };
};
_html2canvas.Util.BackgroundSize = function( el, bounds, image, imageIndex ) {
var result = backgroundBoundsFactory( 'backgroundSize', el, bounds, image, imageIndex );
return { width: result[0], height: result[1] };
};
_html2canvas.Util.Extend = function (options, defaults) {
for (var key in options) {
if (options.hasOwnProperty(key)) {
defaults[key] = options[key];
}
}
return defaults;
};
/*
* Derived from jQuery.contents()
* Copyright 2010, John Resig
* Dual licensed under the MIT or GPL Version 2 licenses.
* http://jquery.org/license
*/
_html2canvas.Util.Children = function( elem ) {
var children;
try {
children = (elem.nodeName && elem.nodeName.toUpperCase() === "IFRAME") ?
elem.contentDocument || elem.contentWindow.document : (function( array ){
var ret = [];
if ( array !== null ) {
(function( first, second ) {
var i = first.length,
j = 0;
if ( typeof second.length === "number" ) {
for ( var l = second.length; j < l; j++ ) {
first[ i++ ] = second[ j ];
}
} else {
while ( second[j] !== undefined ) {
first[ i++ ] = second[ j++ ];
}
}
first.length = i;
return first;
})( ret, array );
}
return ret;
})( elem.childNodes );
} catch (ex) {
h2clog("html2canvas.Util.Children failed with exception: " + ex.message);
children = [];
}
return children;
};
_html2canvas.Util.Font = (function () {
var fontData = {};
return function(font, fontSize, doc) {
if (fontData[font + "-" + fontSize] !== undefined) {
return fontData[font + "-" + fontSize];
}
var container = doc.createElement('div'),
img = doc.createElement('img'),
span = doc.createElement('span'),
sampleText = 'Hidden Text',
baseline,
middle,
metricsObj;
container.style.visibility = "hidden";
container.style.fontFamily = font;
container.style.fontSize = fontSize;
container.style.margin = 0;
container.style.padding = 0;
doc.body.appendChild(container);
// http://probablyprogramming.com/2009/03/15/the-tiniest-gif-ever (handtinywhite.gif)
img.src = "data:image/gif;base64,R0lGODlhAQABAIABAP///wAAACwAAAAAAQABAAACAkQBADs=";
img.width = 1;
img.height = 1;
img.style.margin = 0;
img.style.padding = 0;
img.style.verticalAlign = "baseline";
span.style.fontFamily = font;
span.style.fontSize = fontSize;
span.style.margin = 0;
span.style.padding = 0;
span.appendChild(doc.createTextNode(sampleText));
container.appendChild(span);
container.appendChild(img);
baseline = (img.offsetTop - span.offsetTop) + 1;
container.removeChild(span);
container.appendChild(doc.createTextNode(sampleText));
container.style.lineHeight = "normal";
img.style.verticalAlign = "super";
middle = (img.offsetTop-container.offsetTop) + 1;
metricsObj = {
baseline: baseline,
lineWidth: 1,
middle: middle
};
fontData[font + "-" + fontSize] = metricsObj;
doc.body.removeChild(container);
return metricsObj;
};
})();
(function(){
_html2canvas.Generate = {};
var reGradients = [
/^(-webkit-linear-gradient)\(([a-z\s]+)([\w\d\.\s,%\(\)]+)\)$/,
/^(-o-linear-gradient)\(([a-z\s]+)([\w\d\.\s,%\(\)]+)\)$/,
/^(-webkit-gradient)\((linear|radial),\s((?:\d{1,3}%?)\s(?:\d{1,3}%?),\s(?:\d{1,3}%?)\s(?:\d{1,3}%?))([\w\d\.\s,%\(\)\-]+)\)$/,
/^(-moz-linear-gradient)\(((?:\d{1,3}%?)\s(?:\d{1,3}%?))([\w\d\.\s,%\(\)]+)\)$/,
/^(-webkit-radial-gradient)\(((?:\d{1,3}%?)\s(?:\d{1,3}%?)),\s(\w+)\s([a-z\-]+)([\w\d\.\s,%\(\)]+)\)$/,
/^(-moz-radial-gradient)\(((?:\d{1,3}%?)\s(?:\d{1,3}%?)),\s(\w+)\s?([a-z\-]*)([\w\d\.\s,%\(\)]+)\)$/,
/^(-o-radial-gradient)\(((?:\d{1,3}%?)\s(?:\d{1,3}%?)),\s(\w+)\s([a-z\-]+)([\w\d\.\s,%\(\)]+)\)$/
];
/*
* TODO: Add IE10 vendor prefix (-ms) support
* TODO: Add W3C gradient (linear-gradient) support
* TODO: Add old Webkit -webkit-gradient(radial, ...) support
* TODO: Maybe some RegExp optimizations are possible ;o)
*/
_html2canvas.Generate.parseGradient = function(css, bounds) {
var gradient, i, len = reGradients.length, m1, stop, m2, m2Len, step, m3, tl,tr,br,bl;
for(i = 0; i < len; i+=1){
m1 = css.match(reGradients[i]);
if(m1) {
break;
}
}
if(m1) {
switch(m1[1]) {
case '-webkit-linear-gradient':
case '-o-linear-gradient':
gradient = {
type: 'linear',
x0: null,
y0: null,
x1: null,
y1: null,
colorStops: []
};
// get coordinates
m2 = m1[2].match(/\w+/g);
if(m2){
m2Len = m2.length;
for(i = 0; i < m2Len; i+=1){
switch(m2[i]) {
case 'top':
gradient.y0 = 0;
gradient.y1 = bounds.height;
break;
case 'right':
gradient.x0 = bounds.width;
gradient.x1 = 0;
break;
case 'bottom':
gradient.y0 = bounds.height;
gradient.y1 = 0;
break;
case 'left':
gradient.x0 = 0;
gradient.x1 = bounds.width;
break;
}
}
}
if(gradient.x0 === null && gradient.x1 === null){ // center
gradient.x0 = gradient.x1 = bounds.width / 2;
}
if(gradient.y0 === null && gradient.y1 === null){ // center
gradient.y0 = gradient.y1 = bounds.height / 2;
}
// get colors and stops
m2 = m1[3].match(/((?:rgb|rgba)\(\d{1,3},\s\d{1,3},\s\d{1,3}(?:,\s[0-9\.]+)?\)(?:\s\d{1,3}(?:%|px))?)+/g);
if(m2){
m2Len = m2.length;
step = 1 / Math.max(m2Len - 1, 1);
for(i = 0; i < m2Len; i+=1){
m3 = m2[i].match(/((?:rgb|rgba)\(\d{1,3},\s\d{1,3},\s\d{1,3}(?:,\s[0-9\.]+)?\))\s*(\d{1,3})?(%|px)?/);
if(m3[2]){
stop = parseFloat(m3[2]);
if(m3[3] === '%'){
stop /= 100;
} else { // px - stupid opera
stop /= bounds.width;
}
} else {
stop = i * step;
}
gradient.colorStops.push({
color: m3[1],
stop: stop
});
}
}
break;
case '-webkit-gradient':
gradient = {
type: m1[2] === 'radial' ? 'circle' : m1[2], // TODO: Add radial gradient support for older mozilla definitions
x0: 0,
y0: 0,
x1: 0,
y1: 0,
colorStops: []
};
// get coordinates
m2 = m1[3].match(/(\d{1,3})%?\s(\d{1,3})%?,\s(\d{1,3})%?\s(\d{1,3})%?/);
if(m2){
gradient.x0 = (m2[1] * bounds.width) / 100;
gradient.y0 = (m2[2] * bounds.height) / 100;
gradient.x1 = (m2[3] * bounds.width) / 100;
gradient.y1 = (m2[4] * bounds.height) / 100;
}
// get colors and stops
m2 = m1[4].match(/((?:from|to|color-stop)\((?:[0-9\.]+,\s)?(?:rgb|rgba)\(\d{1,3},\s\d{1,3},\s\d{1,3}(?:,\s[0-9\.]+)?\)\))+/g);
if(m2){
m2Len = m2.length;
for(i = 0; i < m2Len; i+=1){
m3 = m2[i].match(/(from|to|color-stop)\(([0-9\.]+)?(?:,\s)?((?:rgb|rgba)\(\d{1,3},\s\d{1,3},\s\d{1,3}(?:,\s[0-9\.]+)?\))\)/);
stop = parseFloat(m3[2]);
if(m3[1] === 'from') {
stop = 0.0;
}
if(m3[1] === 'to') {
stop = 1.0;
}
gradient.colorStops.push({
color: m3[3],
stop: stop
});
}
}
break;
case '-moz-linear-gradient':
gradient = {
type: 'linear',
x0: 0,
y0: 0,
x1: 0,
y1: 0,
colorStops: []
};
// get coordinates
m2 = m1[2].match(/(\d{1,3})%?\s(\d{1,3})%?/);
// m2[1] == 0% -> left
// m2[1] == 50% -> center
// m2[1] == 100% -> right
// m2[2] == 0% -> top
// m2[2] == 50% -> center
// m2[2] == 100% -> bottom
if(m2){
gradient.x0 = (m2[1] * bounds.width) / 100;
gradient.y0 = (m2[2] * bounds.height) / 100;
gradient.x1 = bounds.width - gradient.x0;
gradient.y1 = bounds.height - gradient.y0;
}
// get colors and stops
m2 = m1[3].match(/((?:rgb|rgba)\(\d{1,3},\s\d{1,3},\s\d{1,3}(?:,\s[0-9\.]+)?\)(?:\s\d{1,3}%)?)+/g);
if(m2){
m2Len = m2.length;
step = 1 / Math.max(m2Len - 1, 1);
for(i = 0; i < m2Len; i+=1){
m3 = m2[i].match(/((?:rgb|rgba)\(\d{1,3},\s\d{1,3},\s\d{1,3}(?:,\s[0-9\.]+)?\))\s*(\d{1,3})?(%)?/);
if(m3[2]){
stop = parseFloat(m3[2]);
if(m3[3]){ // percentage
stop /= 100;
}
} else {
stop = i * step;
}
gradient.colorStops.push({
color: m3[1],
stop: stop
});
}
}
break;
case '-webkit-radial-gradient':
case '-moz-radial-gradient':
case '-o-radial-gradient':
gradient = {
type: 'circle',
x0: 0,
y0: 0,
x1: bounds.width,
y1: bounds.height,
cx: 0,
cy: 0,
rx: 0,
ry: 0,
colorStops: []
};
// center
m2 = m1[2].match(/(\d{1,3})%?\s(\d{1,3})%?/);
if(m2){
gradient.cx = (m2[1] * bounds.width) / 100;
gradient.cy = (m2[2] * bounds.height) / 100;
}
// size
m2 = m1[3].match(/\w+/);
m3 = m1[4].match(/[a-z\-]*/);
if(m2 && m3){
switch(m3[0]){
case 'farthest-corner':
case 'cover': // is equivalent to farthest-corner
case '': // mozilla removes "cover" from definition :(
tl = Math.sqrt(Math.pow(gradient.cx, 2) + Math.pow(gradient.cy, 2));
tr = Math.sqrt(Math.pow(gradient.cx, 2) + Math.pow(gradient.y1 - gradient.cy, 2));
br = Math.sqrt(Math.pow(gradient.x1 - gradient.cx, 2) + Math.pow(gradient.y1 - gradient.cy, 2));
bl = Math.sqrt(Math.pow(gradient.x1 - gradient.cx, 2) + Math.pow(gradient.cy, 2));
gradient.rx = gradient.ry = Math.max(tl, tr, br, bl);
break;
case 'closest-corner':
tl = Math.sqrt(Math.pow(gradient.cx, 2) + Math.pow(gradient.cy, 2));
tr = Math.sqrt(Math.pow(gradient.cx, 2) + Math.pow(gradient.y1 - gradient.cy, 2));
br = Math.sqrt(Math.pow(gradient.x1 - gradient.cx, 2) + Math.pow(gradient.y1 - gradient.cy, 2));
bl = Math.sqrt(Math.pow(gradient.x1 - gradient.cx, 2) + Math.pow(gradient.cy, 2));
gradient.rx = gradient.ry = Math.min(tl, tr, br, bl);
break;
case 'farthest-side':
if(m2[0] === 'circle'){
gradient.rx = gradient.ry = Math.max(
gradient.cx,
gradient.cy,
gradient.x1 - gradient.cx,
gradient.y1 - gradient.cy
);
} else { // ellipse
gradient.type = m2[0];
gradient.rx = Math.max(
gradient.cx,
gradient.x1 - gradient.cx
);
gradient.ry = Math.max(
gradient.cy,
gradient.y1 - gradient.cy
);
}
break;
case 'closest-side':
case 'contain': // is equivalent to closest-side
if(m2[0] === 'circle'){
gradient.rx = gradient.ry = Math.min(
gradient.cx,
gradient.cy,
gradient.x1 - gradient.cx,
gradient.y1 - gradient.cy
);
} else { // ellipse
gradient.type = m2[0];
gradient.rx = Math.min(
gradient.cx,
gradient.x1 - gradient.cx
);
gradient.ry = Math.min(
gradient.cy,
gradient.y1 - gradient.cy
);
}
break;
// TODO: add support for "30px 40px" sizes (webkit only)
}
}
// color stops
m2 = m1[5].match(/((?:rgb|rgba)\(\d{1,3},\s\d{1,3},\s\d{1,3}(?:,\s[0-9\.]+)?\)(?:\s\d{1,3}(?:%|px))?)+/g);
if(m2){
m2Len = m2.length;
step = 1 / Math.max(m2Len - 1, 1);
for(i = 0; i < m2Len; i+=1){
m3 = m2[i].match(/((?:rgb|rgba)\(\d{1,3},\s\d{1,3},\s\d{1,3}(?:,\s[0-9\.]+)?\))\s*(\d{1,3})?(%|px)?/);
if(m3[2]){
stop = parseFloat(m3[2]);
if(m3[3] === '%'){
stop /= 100;
} else { // px - stupid opera
stop /= bounds.width;
}
} else {
stop = i * step;
}
gradient.colorStops.push({
color: m3[1],
stop: stop
});
}
}
break;
}
}
return gradient;
};
_html2canvas.Generate.Gradient = function(src, bounds) {
if(bounds.width === 0 || bounds.height === 0) {
return;
}
var canvas = document.createElement('canvas'),
ctx = canvas.getContext('2d'),
gradient, grad, i, len;
canvas.width = bounds.width;
canvas.height = bounds.height;
// TODO: add support for multi defined background gradients
gradient = _html2canvas.Generate.parseGradient(src, bounds);
if(gradient) {
if(gradient.type === 'linear') {
grad = ctx.createLinearGradient(gradient.x0, gradient.y0, gradient.x1, gradient.y1);
for (i = 0, len = gradient.colorStops.length; i < len; i+=1) {
try {
grad.addColorStop(gradient.colorStops[i].stop, gradient.colorStops[i].color);
}
catch(e) {
h2clog(['failed to add color stop: ', e, '; tried to add: ', gradient.colorStops[i], '; stop: ', i, '; in: ', src]);
}
}
ctx.fillStyle = grad;
ctx.fillRect(0, 0, bounds.width, bounds.height);
} else if(gradient.type === 'circle') {
grad = ctx.createRadialGradient(gradient.cx, gradient.cy, 0, gradient.cx, gradient.cy, gradient.rx);
for (i = 0, len = gradient.colorStops.length; i < len; i+=1) {
try {
grad.addColorStop(gradient.colorStops[i].stop, gradient.colorStops[i].color);
}
catch(e) {
h2clog(['failed to add color stop: ', e, '; tried to add: ', gradient.colorStops[i], '; stop: ', i, '; in: ', src]);
}
}
ctx.fillStyle = grad;
ctx.fillRect(0, 0, bounds.width, bounds.height);
} else if(gradient.type === 'ellipse') {
// draw circle
var canvasRadial = document.createElement('canvas'),
ctxRadial = canvasRadial.getContext('2d'),
ri = Math.max(gradient.rx, gradient.ry),
di = ri * 2, imgRadial;
canvasRadial.width = canvasRadial.height = di;
grad = ctxRadial.createRadialGradient(gradient.rx, gradient.ry, 0, gradient.rx, gradient.ry, ri);
for (i = 0, len = gradient.colorStops.length; i < len; i+=1) {
try {
grad.addColorStop(gradient.colorStops[i].stop, gradient.colorStops[i].color);
}
catch(e) {
h2clog(['failed to add color stop: ', e, '; tried to add: ', gradient.colorStops[i], '; stop: ', i, '; in: ', src]);
}
}
ctxRadial.fillStyle = grad;
ctxRadial.fillRect(0, 0, di, di);
ctx.fillStyle = gradient.colorStops[i - 1].color;
ctx.fillRect(0, 0, canvas.width, canvas.height);
ctx.drawImage(canvasRadial, gradient.cx - gradient.rx, gradient.cy - gradient.ry, 2 * gradient.rx, 2 * gradient.ry);
}
}
return canvas;
};
_html2canvas.Generate.ListAlpha = function(number) {
var tmp = "",
modulus;
do {
modulus = number % 26;
tmp = String.fromCharCode((modulus) + 64) + tmp;
number = number / 26;
}while((number*26) > 26);
return tmp;
};
_html2canvas.Generate.ListRoman = function(number) {
var romanArray = ["M", "CM", "D", "CD", "C", "XC", "L", "XL", "X", "IX", "V", "IV", "I"],
decimal = [1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1],
roman = "",
v,
len = romanArray.length;
if (number <= 0 || number >= 4000) {
return number;
}
for (v=0; v < len; v+=1) {
while (number >= decimal[v]) {
number -= decimal[v];
roman += romanArray[v];
}
}
return roman;
};
})();
function h2cRenderContext(width, height) {
var storage = [];
return {
storage: storage,
width: width,
height: height,
clip: function() {
storage.push({
type: "function",
name: "clip",
'arguments': arguments
});
},
translate: function() {
storage.push({
type: "function",
name: "translate",
'arguments': arguments
});
},
fill: function() {
storage.push({
type: "function",
name: "fill",
'arguments': arguments
});
},
save: function() {
storage.push({
type: "function",
name: "save",
'arguments': arguments
});
},
restore: function() {
storage.push({
type: "function",
name: "restore",
'arguments': arguments
});
},
fillRect: function () {
storage.push({
type: "function",
name: "fillRect",
'arguments': arguments
});
},
createPattern: function() {
storage.push({
type: "function",
name: "createPattern",
'arguments': arguments
});
},
drawShape: function() {
var shape = [];
storage.push({
type: "function",
name: "drawShape",
'arguments': shape
});
return {
moveTo: function() {
shape.push({
name: "moveTo",
'arguments': arguments
});
},
lineTo: function() {
shape.push({
name: "lineTo",
'arguments': arguments
});
},
arcTo: function() {
shape.push({
name: "arcTo",
'arguments': arguments
});
},
bezierCurveTo: function() {
shape.push({
name: "bezierCurveTo",
'arguments': arguments
});
},
quadraticCurveTo: function() {
shape.push({
name: "quadraticCurveTo",
'arguments': arguments
});
}
};
},
drawImage: function () {
storage.push({
type: "function",
name: "drawImage",
'arguments': arguments
});
},
fillText: function () {
storage.push({
type: "function",
name: "fillText",
'arguments': arguments
});
},
setVariable: function (variable, value) {
storage.push({
type: "variable",
name: variable,
'arguments': value
});
}
};
}
_html2canvas.Parse = function (images, options) {
window.scroll(0,0);
var element = (( options.elements === undefined ) ? document.body : options.elements[0]), // select body by default
numDraws = 0,
doc = element.ownerDocument,
support = _html2canvas.Util.Support(options, doc),
ignoreElementsRegExp = new RegExp("(" + options.ignoreElements + ")"),
body = doc.body,
getCSS = _html2canvas.Util.getCSS,
pseudoHide = "___html2canvas___pseudoelement",
hidePseudoElements = doc.createElement('style');
hidePseudoElements.innerHTML = '.' + pseudoHide + '-before:before { content: "" !important; display: none !important; }' +
'.' + pseudoHide + '-after:after { content: "" !important; display: none !important; }';
body.appendChild(hidePseudoElements);
images = images || {};
function documentWidth () {
return Math.max(
Math.max(doc.body.scrollWidth, doc.documentElement.scrollWidth),
Math.max(doc.body.offsetWidth, doc.documentElement.offsetWidth),
Math.max(doc.body.clientWidth, doc.documentElement.clientWidth)
);
}
function documentHeight () {
return Math.max(
Math.max(doc.body.scrollHeight, doc.documentElement.scrollHeight),
Math.max(doc.body.offsetHeight, doc.documentElement.offsetHeight),
Math.max(doc.body.clientHeight, doc.documentElement.clientHeight)
);
}
function getCSSInt(element, attribute) {
var val = parseInt(getCSS(element, attribute), 10);
return (isNaN(val)) ? 0 : val; // borders in old IE are throwing 'medium' for demo.html
}
function renderRect (ctx, x, y, w, h, bgcolor) {
if (bgcolor !== "transparent"){
ctx.setVariable("fillStyle", bgcolor);
ctx.fillRect(x, y, w, h);
numDraws+=1;
}
}
function textTransform (text, transform) {
switch(transform){
case "lowercase":
return text.toLowerCase();
case "capitalize":
return text.replace( /(^|\s|:|-|\(|\))([a-z])/g , function (m, p1, p2) {
if (m.length > 0) {
return p1 + p2.toUpperCase();
}
} );
case "uppercase":
return text.toUpperCase();
default:
return text;
}
}
function noLetterSpacing(letter_spacing) {
return (/^(normal|none|0px)$/.test(letter_spacing));
}
function drawText(currentText, x, y, ctx){
if (currentText !== null && _html2canvas.Util.trimText(currentText).length > 0) {
ctx.fillText(currentText, x, y);
numDraws+=1;
}
}
function setTextVariables(ctx, el, text_decoration, color) {
var align = false,
bold = getCSS(el, "fontWeight"),
family = getCSS(el, "fontFamily"),
size = getCSS(el, "fontSize");
switch(parseInt(bold, 10)){
case 401:
bold = "bold";
break;
case 400:
bold = "normal";
break;
}
ctx.setVariable("fillStyle", color);
ctx.setVariable("font", [getCSS(el, "fontStyle"), getCSS(el, "fontVariant"), bold, size, family].join(" "));
ctx.setVariable("textAlign", (align) ? "right" : "left");
if (text_decoration !== "none"){
return _html2canvas.Util.Font(family, size, doc);
}
}
function renderTextDecoration(ctx, text_decoration, bounds, metrics, color) {
switch(text_decoration) {
case "underline":
// Draws a line at the baseline of the font
// TODO As some browsers display the line as more than 1px if the font-size is big, need to take that into account both in position and size
renderRect(ctx, bounds.left, Math.round(bounds.top + metrics.baseline + metrics.lineWidth), bounds.width, 1, color);
break;
case "overline":
renderRect(ctx, bounds.left, Math.round(bounds.top), bounds.width, 1, color);
break;
case "line-through":
// TODO try and find exact position for line-through
renderRect(ctx, bounds.left, Math.ceil(bounds.top + metrics.middle + metrics.lineWidth), bounds.width, 1, color);
break;
}
}
function getTextBounds(state, text, textDecoration, isLast) {
var bounds;
if (support.rangeBounds) {
if (textDecoration !== "none" || _html2canvas.Util.trimText(text).length !== 0) {
bounds = textRangeBounds(text, state.node, state.textOffset);
}
state.textOffset += text.length;
} else if (state.node && typeof state.node.nodeValue === "string" ){
var newTextNode = (isLast) ? state.node.splitText(text.length) : null;
bounds = textWrapperBounds(state.node);
state.node = newTextNode;
}
return bounds;
}
function textRangeBounds(text, textNode, textOffset) {
var range = doc.createRange();
range.setStart(textNode, textOffset);
range.setEnd(textNode, textOffset + text.length);
return range.getBoundingClientRect();
}
function textWrapperBounds(oldTextNode) {
var parent = oldTextNode.parentNode,
wrapElement = doc.createElement('wrapper'),
backupText = oldTextNode.cloneNode(true);
wrapElement.appendChild(oldTextNode.cloneNode(true));
parent.replaceChild(wrapElement, oldTextNode);
var bounds = _html2canvas.Util.Bounds(wrapElement);
parent.replaceChild(backupText, wrapElement);
return bounds;
}
function renderText(el, textNode, stack) {
var ctx = stack.ctx,
color = getCSS(el, "color"),
textDecoration = getCSS(el, "textDecoration"),
textAlign = getCSS(el, "textAlign"),
metrics,
textList,
state = {
node: textNode,
textOffset: 0
};
if (_html2canvas.Util.trimText(textNode.nodeValue).length > 0) {
textNode.nodeValue = textTransform(textNode.nodeValue, getCSS(el, "textTransform"));
textAlign = textAlign.replace(["-webkit-auto"],["auto"]);
textList = (!options.letterRendering && /^(left|right|justify|auto)$/.test(textAlign) && noLetterSpacing(getCSS(el, "letterSpacing"))) ?
textNode.nodeValue.split(/(\b| )/)
: textNode.nodeValue.split("");
metrics = setTextVariables(ctx, el, textDecoration, color);
if (options.chinese) {
textList.forEach(function(word, index) {
if (/.*[\u4E00-\u9FA5].*$/.test(word)) {
word = word.split("");
word.unshift(index, 1);
textList.splice.apply(textList, word);
}
});
}
textList.forEach(function(text, index) {
var bounds = getTextBounds(state, text, textDecoration, (index < textList.length - 1));
if (bounds) {
drawText(text, bounds.left, bounds.bottom, ctx);
renderTextDecoration(ctx, textDecoration, bounds, metrics, color);
}
});
}
}
function listPosition (element, val) {
var boundElement = doc.createElement( "boundelement" ),
originalType,
bounds;
boundElement.style.display = "inline";
originalType = element.style.listStyleType;
element.style.listStyleType = "none";
boundElement.appendChild(doc.createTextNode(val));
element.insertBefore(boundElement, element.firstChild);
bounds = _html2canvas.Util.Bounds(boundElement);
element.removeChild(boundElement);
element.style.listStyleType = originalType;
return bounds;
}
function elementIndex( el ) {
var i = -1,
count = 1,
childs = el.parentNode.childNodes;
if (el.parentNode) {
while( childs[ ++i ] !== el ) {
if ( childs[ i ].nodeType === 1 ) {
count++;
}
}
return count;
} else {
return -1;
}
}
function listItemText(element, type) {
var currentIndex = elementIndex(element),
text;
switch(type){
case "decimal":
text = currentIndex;
break;
case "decimal-leading-zero":
text = (currentIndex.toString().length === 1) ? currentIndex = "0" + currentIndex.toString() : currentIndex.toString();
break;
case "upper-roman":
text = _html2canvas.Generate.ListRoman( currentIndex );
break;
case "lower-roman":
text = _html2canvas.Generate.ListRoman( currentIndex ).toLowerCase();
break;
case "lower-alpha":
text = _html2canvas.Generate.ListAlpha( currentIndex ).toLowerCase();
break;
case "upper-alpha":
text = _html2canvas.Generate.ListAlpha( currentIndex );
break;
}
text += ". ";
return text;
}
function renderListItem(element, stack, elBounds) {
var x,
text,
ctx = stack.ctx,
type = getCSS(element, "listStyleType"),
listBounds;
if (/^(decimal|decimal-leading-zero|upper-alpha|upper-latin|upper-roman|lower-alpha|lower-greek|lower-latin|lower-roman)$/i.test(type)) {
text = listItemText(element, type);
listBounds = listPosition(element, text);
setTextVariables(ctx, element, "none", getCSS(element, "color"));
if (getCSS(element, "listStylePosition") === "inside") {
ctx.setVariable("textAlign", "left");
x = elBounds.left;
} else {
return;
}
drawText(text, x, listBounds.bottom, ctx);
}
}
function loadImage (src){
var img = images[src];
if (img && img.succeeded === true) {
return img.img;
} else {
return false;
}
}
function clipBounds(src, dst){
var x = Math.max(src.left, dst.left),
y = Math.max(src.top, dst.top),
x2 = Math.min((src.left + src.width), (dst.left + dst.width)),
y2 = Math.min((src.top + src.height), (dst.top + dst.height));
return {
left:x,
top:y,
width:x2-x,
height:y2-y
};
}
function setZ(zIndex, parentZ){
// TODO fix static elements overlapping relative/absolute elements under same stack, if they are defined after them
var newContext;
if (!parentZ){
newContext = h2czContext(0);
return newContext;
}
if (zIndex !== "auto"){
newContext = h2czContext(zIndex);
parentZ.children.push(newContext);
return newContext;
}
return parentZ;
}
function renderImage(ctx, element, image, bounds, borders) {
var paddingLeft = getCSSInt(element, 'paddingLeft'),
paddingTop = getCSSInt(element, 'paddingTop'),
paddingRight = getCSSInt(element, 'paddingRight'),
paddingBottom = getCSSInt(element, 'paddingBottom');
drawImage(
ctx,
image,
0, //sx
0, //sy
image.width, //sw
image.height, //sh
bounds.left + paddingLeft + borders[3].width, //dx
bounds.top + paddingTop + borders[0].width, // dy
bounds.width - (borders[1].width + borders[3].width + paddingLeft + paddingRight), //dw
bounds.height - (borders[0].width + borders[2].width + paddingTop + paddingBottom) //dh
);
}
function getBorderData(element) {
return ["Top", "Right", "Bottom", "Left"].map(function(side) {
return {
width: getCSSInt(element, 'border' + side + 'Width'),
color: getCSS(element, 'border' + side + 'Color')
};
});
}
function getBorderRadiusData(element) {
return ["TopLeft", "TopRight", "BottomRight", "BottomLeft"].map(function(side) {
return getCSS(element, 'border' + side + 'Radius');
});
}
var getCurvePoints = (function(kappa) {
return function(x, y, r1, r2) {
var ox = (r1) * kappa, // control point offset horizontal
oy = (r2) * kappa, // control point offset vertical
xm = x + r1, // x-middle
ym = y + r2; // y-middle
return {
topLeft: bezierCurve({
x:x,
y:ym
}, {
x:x,
y:ym - oy
}, {
x:xm - ox,
y:y
}, {
x:xm,
y:y
}),
topRight: bezierCurve({
x:x,
y:y
}, {
x:x + ox,
y:y
}, {
x:xm,
y:ym - oy
}, {
x:xm,
y:ym
}),
bottomRight: bezierCurve({
x:xm,
y:y
}, {
x:xm,
y:y + oy
}, {
x:x + ox,
y:ym
}, {
x:x,
y:ym
}),
bottomLeft: bezierCurve({
x:xm,
y:ym
}, {
x:xm - ox,
y:ym
}, {
x:x,
y:y + oy
}, {
x:x,
y:y
})
};
};
})(4 * ((Math.sqrt(2) - 1) / 3));
function bezierCurve(start, startControl, endControl, end) {
var lerp = function (a, b, t) {
return {
x:a.x + (b.x - a.x) * t,
y:a.y + (b.y - a.y) * t
};
};
return {
start: start,
startControl: startControl,
endControl: endControl,
end: end,
subdivide: function(t) {
var ab = lerp(start, startControl, t),
bc = lerp(startControl, endControl, t),
cd = lerp(endControl, end, t),
abbc = lerp(ab, bc, t),
bccd = lerp(bc, cd, t),
dest = lerp(abbc, bccd, t);
return [bezierCurve(start, ab, abbc, dest), bezierCurve(dest, bccd, cd, end)];
},
curveTo: function(borderArgs) {
borderArgs.push(["bezierCurve", startControl.x, startControl.y, endControl.x, endControl.y, end.x, end.y]);
},
curveToReversed: function(borderArgs) {
borderArgs.push(["bezierCurve", endControl.x, endControl.y, startControl.x, startControl.y, start.x, start.y]);
}
};
}
function parseCorner(borderArgs, radius1, radius2, corner1, corner2, x, y) {
if (radius1[0] > 0 || radius1[1] > 0) {
borderArgs.push(["line", corner1[0].start.x, corner1[0].start.y]);
corner1[0].curveTo(borderArgs);
corner1[1].curveTo(borderArgs);
} else {
borderArgs.push(["line", x, y]);
}
if (radius2[0] > 0 || radius2[1] > 0) {
borderArgs.push(["line", corner2[0].start.x, corner2[0].start.y]);
}
}
function drawSide(borderData, radius1, radius2, outer1, inner1, outer2, inner2) {
var borderArgs = [];
if (radius1[0] > 0 || radius1[1] > 0) {
borderArgs.push(["line", outer1[1].start.x, outer1[1].start.y]);
outer1[1].curveTo(borderArgs);
} else {
borderArgs.push([ "line", borderData.c1[0], borderData.c1[1]]);
}
if (radius2[0] > 0 || radius2[1] > 0) {
borderArgs.push(["line", outer2[0].start.x, outer2[0].start.y]);
outer2[0].curveTo(borderArgs);
borderArgs.push(["line", inner2[0].end.x, inner2[0].end.y]);
inner2[0].curveToReversed(borderArgs);
} else {
borderArgs.push([ "line", borderData.c2[0], borderData.c2[1]]);
borderArgs.push([ "line", borderData.c3[0], borderData.c3[1]]);
}
if (radius1[0] > 0 || radius1[1] > 0) {
borderArgs.push(["line", inner1[1].end.x, inner1[1].end.y]);
inner1[1].curveToReversed(borderArgs);
} else {
borderArgs.push([ "line", borderData.c4[0], borderData.c4[1]]);
}
return borderArgs;
}
function calculateCurvePoints(bounds, borderRadius, borders) {
var x = bounds.left,
y = bounds.top,
width = bounds.width,
height = bounds.height,
tlh = borderRadius[0][0],
tlv = borderRadius[0][1],
trh = borderRadius[1][0],
trv = borderRadius[1][1],
brh = borderRadius[2][0],
brv = borderRadius[2][1],
blh = borderRadius[3][0],
blv = borderRadius[3][1],
topWidth = width - trh,
rightHeight = height - brv,
bottomWidth = width - brh,
leftHeight = height - blv;
return {
topLeftOuter: getCurvePoints(
x,
y,
tlh,
tlv
).topLeft.subdivide(0.5),
topLeftInner: getCurvePoints(
x + borders[3].width,
y + borders[0].width,
Math.max(0, tlh - borders[3].width),
Math.max(0, tlv - borders[0].width)
).topLeft.subdivide(0.5),
topRightOuter: getCurvePoints(
x + topWidth,
y,
trh,
trv
).topRight.subdivide(0.5),
topRightInner: getCurvePoints(
x + Math.min(topWidth, width + borders[3].width),
y + borders[0].width,
(topWidth > width + borders[3].width) ? 0 :trh - borders[3].width,
trv - borders[0].width
).topRight.subdivide(0.5),
bottomRightOuter: getCurvePoints(
x + bottomWidth,
y + rightHeight,
brh,
brv
).bottomRight.subdivide(0.5),
bottomRightInner: getCurvePoints(
x + Math.min(bottomWidth, width + borders[3].width),
y + Math.min(rightHeight, height + borders[0].width),
Math.max(0, brh - borders[1].width),
Math.max(0, brv - borders[2].width)
).bottomRight.subdivide(0.5),
bottomLeftOuter: getCurvePoints(
x,
y + leftHeight,
blh,
blv
).bottomLeft.subdivide(0.5),
bottomLeftInner: getCurvePoints(
x + borders[3].width,
y + leftHeight,
Math.max(0, blh - borders[3].width),
Math.max(0, blv - borders[2].width)
).bottomLeft.subdivide(0.5)
};
}
function getBorderClip(element, borderPoints, borders, radius, bounds) {
var backgroundClip = getCSS(element, 'backgroundClip'),
borderArgs = [];
switch(backgroundClip) {
case "content-box":
case "padding-box":
parseCorner(borderArgs, radius[0], radius[1], borderPoints.topLeftInner, borderPoints.topRightInner, bounds.left + borders[3].width, bounds.top + borders[0].width);
parseCorner(borderArgs, radius[1], radius[2], borderPoints.topRightInner, borderPoints.bottomRightInner, bounds.left + bounds.width - borders[1].width, bounds.top + borders[0].width);
parseCorner(borderArgs, radius[2], radius[3], borderPoints.bottomRightInner, borderPoints.bottomLeftInner, bounds.left + bounds.width - borders[1].width, bounds.top + bounds.height - borders[2].width);
parseCorner(borderArgs, radius[3], radius[0], borderPoints.bottomLeftInner, borderPoints.topLeftInner, bounds.left + borders[3].width, bounds.top + bounds.height - borders[2].width);
break;
default:
parseCorner(borderArgs, radius[0], radius[1], borderPoints.topLeftOuter, borderPoints.topRightOuter, bounds.left, bounds.top);
parseCorner(borderArgs, radius[1], radius[2], borderPoints.topRightOuter, borderPoints.bottomRightOuter, bounds.left + bounds.width, bounds.top);
parseCorner(borderArgs, radius[2], radius[3], borderPoints.bottomRightOuter, borderPoints.bottomLeftOuter, bounds.left + bounds.width, bounds.top + bounds.height);
parseCorner(borderArgs, radius[3], radius[0], borderPoints.bottomLeftOuter, borderPoints.topLeftOuter, bounds.left, bounds.top + bounds.height);
break;
}
return borderArgs;
}
function parseBorders(element, bounds, borders){
var x = bounds.left,
y = bounds.top,
width = bounds.width,
height = bounds.height,
borderSide,
bx,
by,
bw,
bh,
borderArgs,
// http://www.w3.org/TR/css3-background/#the-border-radius
borderRadius = getBorderRadiusData(element),
borderPoints = calculateCurvePoints(bounds, borderRadius, borders),
borderData = {
clip: getBorderClip(element, borderPoints, borders, borderRadius, bounds),
borders: []
};
for (borderSide = 0; borderSide < 4; borderSide++) {
if (borders[borderSide].width > 0) {
bx = x;
by = y;
bw = width;
bh = height - (borders[2].width);
switch(borderSide) {
case 0:
// top border
bh = borders[0].width;
borderArgs = drawSide({
c1: [bx, by],
c2: [bx + bw, by],
c3: [bx + bw - borders[1].width, by + bh],
c4: [bx + borders[3].width, by + bh]
}, borderRadius[0], borderRadius[1],
borderPoints.topLeftOuter, borderPoints.topLeftInner, borderPoints.topRightOuter, borderPoints.topRightInner);
break;
case 1:
// right border
bx = x + width - (borders[1].width);
bw = borders[1].width;
borderArgs = drawSide({
c1: [bx + bw, by],
c2: [bx + bw, by + bh + borders[2].width],
c3: [bx, by + bh],
c4: [bx, by + borders[0].width]
}, borderRadius[1], borderRadius[2],
borderPoints.topRightOuter, borderPoints.topRightInner, borderPoints.bottomRightOuter, borderPoints.bottomRightInner);
break;
case 2:
// bottom border
by = (by + height) - (borders[2].width);
bh = borders[2].width;
borderArgs = drawSide({
c1: [bx + bw, by + bh],
c2: [bx, by + bh],
c3: [bx + borders[3].width, by],
c4: [bx + bw - borders[2].width, by]
}, borderRadius[2], borderRadius[3],
borderPoints.bottomRightOuter, borderPoints.bottomRightInner, borderPoints.bottomLeftOuter, borderPoints.bottomLeftInner);
break;
case 3:
// left border
bw = borders[3].width;
borderArgs = drawSide({
c1: [bx, by + bh + borders[2].width],
c2: [bx, by],
c3: [bx + bw, by + borders[0].width],
c4: [bx + bw, by + bh]
}, borderRadius[3], borderRadius[0],
borderPoints.bottomLeftOuter, borderPoints.bottomLeftInner, borderPoints.topLeftOuter, borderPoints.topLeftInner);
break;
}
borderData.borders.push({
args: borderArgs,
color: borders[borderSide].color
});
}
}
return borderData;
}
function createShape(ctx, args) {
var shape = ctx.drawShape();
args.forEach(function(border, index) {
shape[(index === 0) ? "moveTo" : border[0] + "To" ].apply(null, border.slice(1));
});
return shape;
}
function renderBorders(ctx, borderArgs, color) {
if (color !== "transparent") {
ctx.setVariable( "fillStyle", color);
createShape(ctx, borderArgs);
ctx.fill();
numDraws+=1;
}
}
function renderFormValue (el, bounds, stack){
var valueWrap = doc.createElement('valuewrap'),
cssPropertyArray = ['lineHeight','textAlign','fontFamily','color','fontSize','paddingLeft','paddingTop','width','height','border','borderLeftWidth','borderTopWidth'],
textValue,
textNode;
cssPropertyArray.forEach(function(property) {
try {
valueWrap.style[property] = getCSS(el, property);
} catch(e) {
// Older IE has issues with "border"
h2clog("html2canvas: Parse: Exception caught in renderFormValue: " + e.message);
}
});
valueWrap.style.borderColor = "black";
valueWrap.style.borderStyle = "solid";
valueWrap.style.display = "block";
valueWrap.style.position = "absolute";
if (/^(submit|reset|button|text|password)$/.test(el.type) || el.nodeName === "SELECT"){
valueWrap.style.lineHeight = getCSS(el, "height");
}
valueWrap.style.top = bounds.top + "px";
valueWrap.style.left = bounds.left + "px";
textValue = (el.nodeName === "SELECT") ? (el.options[el.selectedIndex] || 0).text : el.value;
if(!textValue) {
textValue = el.placeholder;
}
textNode = doc.createTextNode(textValue);
valueWrap.appendChild(textNode);
body.appendChild(valueWrap);
renderText(el, textNode, stack);
body.removeChild(valueWrap);
}
function drawImage (ctx) {
ctx.drawImage.apply(ctx, Array.prototype.slice.call(arguments, 1));
numDraws+=1;
}
function getPseudoElement(el, which) {
var elStyle = window.getComputedStyle(el, which);
if(!elStyle || !elStyle.content || elStyle.content === "none" || elStyle.content === "-moz-alt-content" || elStyle.display === "none") {
return;
}
var content = elStyle.content + '',
first = content.substr( 0, 1 );
//strips quotes
if(first === content.substr( content.length - 1 ) && first.match(/'|"/)) {
content = content.substr( 1, content.length - 2 );
}
var isImage = content.substr( 0, 3 ) === 'url',
elps = document.createElement( isImage ? 'img' : 'span' );
elps.className = pseudoHide + "-before " + pseudoHide + "-after";
Object.keys(elStyle).filter(indexedProperty).forEach(function(prop) {
// Prevent assigning of read only CSS Rules, ex. length, parentRule
try {
elps.style[prop] = elStyle[prop];
} catch (e) {
h2clog(['Tried to assign readonly property ', prop, 'Error:', e]);
}
});
if(isImage) {
elps.src = _html2canvas.Util.parseBackgroundImage(content)[0].args[0];
} else {
elps.innerHTML = content;
}
return elps;
}
function indexedProperty(property) {
return (isNaN(window.parseInt(property, 10)));
}
function injectPseudoElements(el, stack) {
var before = getPseudoElement(el, ':before'),
after = getPseudoElement(el, ':after');
if(!before && !after) {
return;
}
if(before) {
el.className += " " + pseudoHide + "-before";
el.parentNode.insertBefore(before, el);
parseElement(before, stack, true);
el.parentNode.removeChild(before);
el.className = el.className.replace(pseudoHide + "-before", "").trim();
}
if (after) {
el.className += " " + pseudoHide + "-after";
el.appendChild(after);
parseElement(after, stack, true);
el.removeChild(after);
el.className = el.className.replace(pseudoHide + "-after", "").trim();
}
}
function renderBackgroundRepeat(ctx, image, backgroundPosition, bounds) {
var offsetX = Math.round(bounds.left + backgroundPosition.left),
offsetY = Math.round(bounds.top + backgroundPosition.top);
ctx.createPattern(image);
ctx.translate(offsetX, offsetY);
ctx.fill();
ctx.translate(-offsetX, -offsetY);
}
function backgroundRepeatShape(ctx, image, backgroundPosition, bounds, left, top, width, height) {
var args = [];
args.push(["line", Math.round(left), Math.round(top)]);
args.push(["line", Math.round(left + width), Math.round(top)]);
args.push(["line", Math.round(left + width), Math.round(height + top)]);
args.push(["line", Math.round(left), Math.round(height + top)]);
createShape(ctx, args);
ctx.save();
ctx.clip();
renderBackgroundRepeat(ctx, image, backgroundPosition, bounds);
ctx.restore();
}
function renderBackgroundColor(ctx, backgroundBounds, bgcolor) {
renderRect(
ctx,
backgroundBounds.left,
backgroundBounds.top,
backgroundBounds.width,
backgroundBounds.height,
bgcolor
);
}
function renderBackgroundRepeating(el, bounds, ctx, image, imageIndex) {
var backgroundSize = _html2canvas.Util.BackgroundSize(el, bounds, image, imageIndex),
backgroundPosition = _html2canvas.Util.BackgroundPosition(el, bounds, image, imageIndex, backgroundSize),
backgroundRepeat = getCSS(el, "backgroundRepeat").split(",").map(function(value) {
return value.trim();
});
image = resizeImage(image, backgroundSize);
backgroundRepeat = backgroundRepeat[imageIndex] || backgroundRepeat[0];
switch (backgroundRepeat) {
case "repeat-x":
backgroundRepeatShape(ctx, image, backgroundPosition, bounds,
bounds.left, bounds.top + backgroundPosition.top, 99999, image.height);
break;
case "repeat-y":
backgroundRepeatShape(ctx, image, backgroundPosition, bounds,
bounds.left + backgroundPosition.left, bounds.top, image.width, 99999);
break;
case "no-repeat":
backgroundRepeatShape(ctx, image, backgroundPosition, bounds,
bounds.left + backgroundPosition.left, bounds.top + backgroundPosition.top, image.width, image.height);
break;
default:
renderBackgroundRepeat(ctx, image, backgroundPosition, {
top: bounds.top,
left: bounds.left,
width: image.width,
height: image.height
});
break;
}
}
function renderBackgroundImage(element, bounds, ctx) {
var backgroundImage = getCSS(element, "backgroundImage"),
backgroundImages = _html2canvas.Util.parseBackgroundImage(backgroundImage),
image,
imageIndex = backgroundImages.length;
while(imageIndex--) {
backgroundImage = backgroundImages[imageIndex];
if (!backgroundImage.args || backgroundImage.args.length === 0) {
continue;
}
var key = backgroundImage.method === 'url' ?
backgroundImage.args[0] :
backgroundImage.value;
image = loadImage(key);
// TODO add support for background-origin
if (image) {
renderBackgroundRepeating(element, bounds, ctx, image, imageIndex);
} else {
h2clog("html2canvas: Error loading background:", backgroundImage);
}
}
}
function resizeImage(image, bounds) {
if(image.width === bounds.width && image.height === bounds.height) {
return image;
}
var ctx, canvas = doc.createElement('canvas');
canvas.width = bounds.width;
canvas.height = bounds.height;
ctx = canvas.getContext("2d");
drawImage(ctx, image, 0, 0, image.width, image.height, 0, 0, bounds.width, bounds.height );
return canvas;
}
function setOpacity(ctx, element, parentStack) {
var opacity = getCSS(element, "opacity") * ((parentStack) ? parentStack.opacity : 1);
ctx.setVariable("globalAlpha", opacity);
return opacity;
}
function createStack(element, parentStack, bounds) {
var ctx = h2cRenderContext((!parentStack) ? documentWidth() : bounds.width , (!parentStack) ? documentHeight() : bounds.height),
stack = {
ctx: ctx,
zIndex: setZ(getCSS(element, "zIndex"), (parentStack) ? parentStack.zIndex : null),
opacity: setOpacity(ctx, element, parentStack),
cssPosition: getCSS(element, "position"),
borders: getBorderData(element),
clip: (parentStack && parentStack.clip) ? _html2canvas.Util.Extend( {}, parentStack.clip ) : null
};
// TODO correct overflow for absolute content residing under a static position
if (options.useOverflow === true && /(hidden|scroll|auto)/.test(getCSS(element, "overflow")) === true && /(BODY)/i.test(element.nodeName) === false){
stack.clip = (stack.clip) ? clipBounds(stack.clip, bounds) : bounds;
}
stack.zIndex.children.push(stack);
return stack;
}
function getBackgroundBounds(borders, bounds, clip) {
var backgroundBounds = {
left: bounds.left + borders[3].width,
top: bounds.top + borders[0].width,
width: bounds.width - (borders[1].width + borders[3].width),
height: bounds.height - (borders[0].width + borders[2].width)
};
if (clip) {
backgroundBounds = clipBounds(backgroundBounds, clip);
}
return backgroundBounds;
}
function renderElement(element, parentStack, pseudoElement){
var bounds = _html2canvas.Util.Bounds(element),
image,
bgcolor = (ignoreElementsRegExp.test(element.nodeName)) ? "#efefef" : getCSS(element, "backgroundColor"),
stack = createStack(element, parentStack, bounds),
borders = stack.borders,
ctx = stack.ctx,
backgroundBounds = getBackgroundBounds(borders, bounds, stack.clip),
borderData = parseBorders(element, bounds, borders);
createShape(ctx, borderData.clip);
ctx.save();
ctx.clip();
if (backgroundBounds.height > 0 && backgroundBounds.width > 0){
renderBackgroundColor(ctx, bounds, bgcolor);
renderBackgroundImage(element, backgroundBounds, ctx);
}
ctx.restore();
borderData.borders.forEach(function(border) {
renderBorders(ctx, border.args, border.color);
});
if (!pseudoElement) {
injectPseudoElements(element, stack);
}
switch(element.nodeName){
case "IMG":
if ((image = loadImage(element.getAttribute('src')))) {
renderImage(ctx, element, image, bounds, borders);
} else {
h2clog("html2canvas: Error loading <img>:" + element.getAttribute('src'));
}
break;
case "INPUT":
// TODO add all relevant type's, i.e. HTML5 new stuff
// todo add support for placeholder attribute for browsers which support it
if (/^(text|url|email|submit|button|reset)$/.test(element.type) && (element.value || element.placeholder || "").length > 0){
renderFormValue(element, bounds, stack);
}
break;
case "TEXTAREA":
if ((element.value || element.placeholder || "").length > 0){
renderFormValue(element, bounds, stack);
}
break;
case "SELECT":
if ((element.options||element.placeholder || "").length > 0){
renderFormValue(element, bounds, stack);
}
break;
case "LI":
renderListItem(element, stack, backgroundBounds);
break;
case "CANVAS":
renderImage(ctx, element, element, bounds, borders);
break;
}
return stack;
}
function isElementVisible(element) {
return (getCSS(element, 'display') !== "none" && getCSS(element, 'visibility') !== "hidden" && !element.hasAttribute("data-html2canvas-ignore"));
}
function parseElement (el, stack, pseudoElement) {
if (isElementVisible(el)) {
stack = renderElement(el, stack, pseudoElement) || stack;
if (!ignoreElementsRegExp.test(el.nodeName)) {
_html2canvas.Util.Children(el).forEach(function(node) {
if (node.nodeType === 1) {
parseElement(node, stack, pseudoElement);
} else if (node.nodeType === 3) {
renderText(el, node, stack);
}
});
}
}
}
function svgDOMRender(body, stack) {
var img = new Image(),
docWidth = documentWidth(),
docHeight = documentHeight(),
html = "";
function parseDOM(el) {
var children = _html2canvas.Util.Children( el ),
len = children.length,
attr,
a,
alen,
elm,
i;
for ( i = 0; i < len; i+=1 ) {
elm = children[ i ];
if ( elm.nodeType === 3 ) {
// Text node
html += elm.nodeValue.replace(/</g,"&lt;").replace(/>/g,"&gt;");
} else if ( elm.nodeType === 1 ) {
// Element
if ( !/^(script|meta|title)$/.test(elm.nodeName.toLowerCase()) ) {
html += "<" + elm.nodeName.toLowerCase();
// add attributes
if ( elm.hasAttributes() ) {
attr = elm.attributes;
alen = attr.length;
for ( a = 0; a < alen; a+=1 ) {
html += " " + attr[ a ].name + '="' + attr[ a ].value + '"';
}
}
html += '>';
parseDOM( elm );
html += "</" + elm.nodeName.toLowerCase() + ">";
}
}
}
}
parseDOM(body);
img.src = [
"data:image/svg+xml,",
"<svg xmlns='http://www.w3.org/2000/svg' version='1.1' width='" + docWidth + "' height='" + docHeight + "'>",
"<foreignObject width='" + docWidth + "' height='" + docHeight + "'>",
"<html xmlns='http://www.w3.org/1999/xhtml' style='margin:0;'>",
html.replace(/\#/g,"%23"),
"</html>",
"</foreignObject>",
"</svg>"
].join("");
img.onload = function() {
stack.svgRender = img;
};
}
function init() {
var stack = renderElement(element, null);
if (support.svgRendering) {
svgDOMRender(document.documentElement, stack);
}
Array.prototype.slice.call(element.children, 0).forEach(function(childElement) {
parseElement(childElement, stack);
});
stack.backgroundColor = getCSS(document.documentElement, "backgroundColor");
body.removeChild(hidePseudoElements);
return stack;
}
return init();
};
function h2czContext(zindex) {
return {
zindex: zindex,
children: []
};
}
_html2canvas.Preload = function( options ) {
var images = {
numLoaded: 0, // also failed are counted here
numFailed: 0,
numTotal: 0,
cleanupDone: false
},
pageOrigin,
methods,
i,
count = 0,
element = options.elements[0] || document.body,
doc = element.ownerDocument,
domImages = element.getElementsByTagName('img'), // Fetch images of the present element only
imgLen = domImages.length,
link = doc.createElement("a"),
supportCORS = (function( img ){
return (img.crossOrigin !== undefined);
})(new Image()),
timeoutTimer;
link.href = window.location.href;
pageOrigin = link.protocol + link.host;
function isSameOrigin(url){
link.href = url;
link.href = link.href; // YES, BELIEVE IT OR NOT, that is required for IE9 - http://jsfiddle.net/niklasvh/2e48b/
var origin = link.protocol + link.host;
return (origin === pageOrigin);
}
function start(){
h2clog("html2canvas: start: images: " + images.numLoaded + " / " + images.numTotal + " (failed: " + images.numFailed + ")");
if (!images.firstRun && images.numLoaded >= images.numTotal){
h2clog("Finished loading images: # " + images.numTotal + " (failed: " + images.numFailed + ")");
if (typeof options.complete === "function"){
options.complete(images);
}
}
}
// TODO modify proxy to serve images with CORS enabled, where available
function proxyGetImage(url, img, imageObj){
var callback_name,
scriptUrl = options.proxy,
script;
link.href = url;
url = link.href; // work around for pages with base href="" set - WARNING: this may change the url
callback_name = 'html2canvas_' + (count++);
imageObj.callbackname = callback_name;
if (scriptUrl.indexOf("?") > -1) {
scriptUrl += "&";
} else {
scriptUrl += "?";
}
scriptUrl += 'url=' + encodeURIComponent(url) + '&callback=' + callback_name;
script = doc.createElement("script");
window[callback_name] = function(a){
if (a.substring(0,6) === "error:"){
imageObj.succeeded = false;
images.numLoaded++;
images.numFailed++;
start();
} else {
setImageLoadHandlers(img, imageObj);
img.src = a;
}
window[callback_name] = undefined; // to work with IE<9 // NOTE: that the undefined callback property-name still exists on the window object (for IE<9)
try {
delete window[callback_name]; // for all browser that support this
} catch(ex) {}
script.parentNode.removeChild(script);
script = null;
delete imageObj.script;
delete imageObj.callbackname;
};
script.setAttribute("type", "text/javascript");
script.setAttribute("src", scriptUrl);
imageObj.script = script;
window.document.body.appendChild(script);
}
function loadPseudoElement(element, type) {
var style = window.getComputedStyle(element, type),
content = style.content;
if (content.substr(0, 3) === 'url') {
methods.loadImage(_html2canvas.Util.parseBackgroundImage(content)[0].args[0]);
}
loadBackgroundImages(style.backgroundImage, element);
}
function loadPseudoElementImages(element) {
loadPseudoElement(element, ":before");
loadPseudoElement(element, ":after");
}
function loadGradientImage(backgroundImage, bounds) {
var img = _html2canvas.Generate.Gradient(backgroundImage, bounds);
if (img !== undefined){
images[backgroundImage] = {
img: img,
succeeded: true
};
images.numTotal++;
images.numLoaded++;
start();
}
}
function invalidBackgrounds(background_image) {
return (background_image && background_image.method && background_image.args && background_image.args.length > 0 );
}
function loadBackgroundImages(background_image, el) {
var bounds;
_html2canvas.Util.parseBackgroundImage(background_image).filter(invalidBackgrounds).forEach(function(background_image) {
if (background_image.method === 'url') {
methods.loadImage(background_image.args[0]);
} else if(background_image.method.match(/\-?gradient$/)) {
if(bounds === undefined) {
bounds = _html2canvas.Util.Bounds(el);
}
loadGradientImage(background_image.value, bounds);
}
});
}
function getImages (el) {
var elNodeType = false;
// Firefox fails with permission denied on pages with iframes
try {
_html2canvas.Util.Children(el).forEach(function(img) {
getImages(img);
});
}
catch( e ) {}
try {
elNodeType = el.nodeType;
} catch (ex) {
elNodeType = false;
h2clog("html2canvas: failed to access some element's nodeType - Exception: " + ex.message);
}
if (elNodeType === 1 || elNodeType === undefined) {
loadPseudoElementImages(el);
try {
loadBackgroundImages(_html2canvas.Util.getCSS(el, 'backgroundImage'), el);
} catch(e) {
h2clog("html2canvas: failed to get background-image - Exception: " + e.message);
}
loadBackgroundImages(el);
}
}
function setImageLoadHandlers(img, imageObj) {
img.onload = function() {
if ( imageObj.timer !== undefined ) {
// CORS succeeded
window.clearTimeout( imageObj.timer );
}
images.numLoaded++;
imageObj.succeeded = true;
img.onerror = img.onload = null;
start();
};
img.onerror = function() {
if (img.crossOrigin === "anonymous") {
// CORS failed
window.clearTimeout( imageObj.timer );
// let's try with proxy instead
if ( options.proxy ) {
var src = img.src;
img = new Image();
imageObj.img = img;
img.src = src;
proxyGetImage( img.src, img, imageObj );
return;
}
}
images.numLoaded++;
images.numFailed++;
imageObj.succeeded = false;
img.onerror = img.onload = null;
start();
};
}
methods = {
loadImage: function( src ) {
var img, imageObj;
if ( src && images[src] === undefined ) {
img = new Image();
if ( src.match(/data:image\/.*;base64,/i) ) {
img.src = src.replace(/url\(['"]{0,}|['"]{0,}\)$/ig, '');
imageObj = images[src] = {
img: img
};
images.numTotal++;
setImageLoadHandlers(img, imageObj);
} else if ( isSameOrigin( src ) || options.allowTaint === true ) {
imageObj = images[src] = {
img: img
};
images.numTotal++;
setImageLoadHandlers(img, imageObj);
img.src = src;
} else if ( supportCORS && !options.allowTaint && options.useCORS ) {
// attempt to load with CORS
img.crossOrigin = "anonymous";
imageObj = images[src] = {
img: img
};
images.numTotal++;
setImageLoadHandlers(img, imageObj);
img.src = src;
// work around for https://bugs.webkit.org/show_bug.cgi?id=80028
img.customComplete = function () {
if (!this.img.complete) {
this.timer = window.setTimeout(this.img.customComplete, 100);
} else {
this.img.onerror();
}
}.bind(imageObj);
img.customComplete();
} else if ( options.proxy ) {
imageObj = images[src] = {
img: img
};
images.numTotal++;
proxyGetImage( src, img, imageObj );
}
}
},
cleanupDOM: function(cause) {
var img, src;
if (!images.cleanupDone) {
if (cause && typeof cause === "string") {
h2clog("html2canvas: Cleanup because: " + cause);
} else {
h2clog("html2canvas: Cleanup after timeout: " + options.timeout + " ms.");
}
for (src in images) {
if (images.hasOwnProperty(src)) {
img = images[src];
if (typeof img === "object" && img.callbackname && img.succeeded === undefined) {
// cancel proxy image request
window[img.callbackname] = undefined; // to work with IE<9 // NOTE: that the undefined callback property-name still exists on the window object (for IE<9)
try {
delete window[img.callbackname]; // for all browser that support this
} catch(ex) {}
if (img.script && img.script.parentNode) {
img.script.setAttribute("src", "about:blank"); // try to cancel running request
img.script.parentNode.removeChild(img.script);
}
images.numLoaded++;
images.numFailed++;
h2clog("html2canvas: Cleaned up failed img: '" + src + "' Steps: " + images.numLoaded + " / " + images.numTotal);
}
}
}
// cancel any pending requests
if(window.stop !== undefined) {
window.stop();
} else if(document.execCommand !== undefined) {
document.execCommand("Stop", false);
}
if (document.close !== undefined) {
document.close();
}
images.cleanupDone = true;
if (!(cause && typeof cause === "string")) {
start();
}
}
},
renderingDone: function() {
if (timeoutTimer) {
window.clearTimeout(timeoutTimer);
}
}
};
if (options.timeout > 0) {
timeoutTimer = window.setTimeout(methods.cleanupDOM, options.timeout);
}
h2clog('html2canvas: Preload starts: finding background-images');
images.firstRun = true;
getImages(element);
h2clog('html2canvas: Preload: Finding images');
// load <img> images
for (i = 0; i < imgLen; i+=1){
methods.loadImage( domImages[i].getAttribute( "src" ) );
}
images.firstRun = false;
h2clog('html2canvas: Preload: Done.');
if ( images.numTotal === images.numLoaded ) {
start();
}
return methods;
};
_html2canvas.Renderer = function(parseQueue, options){
function createRenderQueue(parseQueue) {
var queue = [];
var sortZ = function(zStack){
var subStacks = [],
stackValues = [];
zStack.children.forEach(function(stackChild) {
if (stackChild.children && stackChild.children.length > 0){
subStacks.push(stackChild);
stackValues.push(stackChild.zindex);
} else {
queue.push(stackChild);
}
});
stackValues.sort(function(a, b) {
return a - b;
});
stackValues.forEach(function(zValue) {
var index;
subStacks.some(function(stack, i){
index = i;
return (stack.zindex === zValue);
});
sortZ(subStacks.splice(index, 1)[0]);
});
};
sortZ(parseQueue.zIndex);
return queue;
}
function getRenderer(rendererName) {
var renderer;
if (typeof options.renderer === "string" && _html2canvas.Renderer[rendererName] !== undefined) {
renderer = _html2canvas.Renderer[rendererName](options);
} else if (typeof rendererName === "function") {
renderer = rendererName(options);
} else {
throw new Error("Unknown renderer");
}
if ( typeof renderer !== "function" ) {
throw new Error("Invalid renderer defined");
}
return renderer;
}
return getRenderer(options.renderer)(parseQueue, options, document, createRenderQueue(parseQueue), _html2canvas);
};
_html2canvas.Util.Support = function (options, doc) {
function supportSVGRendering() {
var img = new Image(),
canvas = doc.createElement("canvas"),
ctx = (canvas.getContext === undefined) ? false : canvas.getContext("2d");
if (ctx === false) {
return false;
}
canvas.width = canvas.height = 10;
img.src = [
"data:image/svg+xml,",
"<svg xmlns='http://www.w3.org/2000/svg' width='10' height='10'>",
"<foreignObject width='10' height='10'>",
"<div xmlns='http://www.w3.org/1999/xhtml' style='width:10;height:10;'>",
"sup",
"</div>",
"</foreignObject>",
"</svg>"
].join("");
try {
ctx.drawImage(img, 0, 0);
canvas.toDataURL();
} catch(e) {
return false;
}
h2clog('html2canvas: Parse: SVG powered rendering available');
return true;
}
// Test whether we can use ranges to measure bounding boxes
// Opera doesn't provide valid bounds.height/bottom even though it supports the method.
function supportRangeBounds() {
var r, testElement, rangeBounds, rangeHeight, support = false;
if (doc.createRange) {
r = doc.createRange();
if (r.getBoundingClientRect) {
testElement = doc.createElement('boundtest');
testElement.style.height = "123px";
testElement.style.display = "block";
doc.body.appendChild(testElement);
r.selectNode(testElement);
rangeBounds = r.getBoundingClientRect();
rangeHeight = rangeBounds.height;
if (rangeHeight === 123) {
support = true;
}
doc.body.removeChild(testElement);
}
}
return support;
}
return {
rangeBounds: supportRangeBounds(),
svgRendering: options.svgRendering && supportSVGRendering()
};
};
window.html2canvas = function(elements, opts) {
elements = (elements.length) ? elements : [elements];
var queue,
canvas,
options = {
// general
logging: false,
elements: elements,
background: "#fff",
// preload options
proxy: null,
timeout: 0, // no timeout
useCORS: false, // try to load images as CORS (where available), before falling back to proxy
allowTaint: false, // whether to allow images to taint the canvas, won't need proxy if set to true
// parse options
svgRendering: false, // use svg powered rendering where available (FF11+)
ignoreElements: "IFRAME|OBJECT|PARAM",
useOverflow: true,
letterRendering: false,
chinese: false,
// render options
width: null,
height: null,
taintTest: true, // do a taint test with all images before applying to canvas
renderer: "Canvas"
};
options = _html2canvas.Util.Extend(opts, options);
_html2canvas.logging = options.logging;
options.complete = function( images ) {
if (typeof options.onpreloaded === "function") {
if ( options.onpreloaded( images ) === false ) {
return;
}
}
queue = _html2canvas.Parse( images, options );
if (typeof options.onparsed === "function") {
if ( options.onparsed( queue ) === false ) {
return;
}
}
canvas = _html2canvas.Renderer( queue, options );
if (typeof options.onrendered === "function") {
options.onrendered( canvas );
}
};
// for pages without images, we still want this to be async, i.e. return methods before executing
window.setTimeout( function(){
_html2canvas.Preload( options );
}, 0 );
return {
render: function( queue, opts ) {
return _html2canvas.Renderer( queue, _html2canvas.Util.Extend(opts, options) );
},
parse: function( images, opts ) {
return _html2canvas.Parse( images, _html2canvas.Util.Extend(opts, options) );
},
preload: function( opts ) {
return _html2canvas.Preload( _html2canvas.Util.Extend(opts, options) );
},
log: h2clog
};
};
window.html2canvas.log = h2clog; // for renderers
window.html2canvas.Renderer = {
Canvas: undefined // We are assuming this will be used
};
_html2canvas.Renderer.Canvas = function(options) {
options = options || {};
var doc = document,
safeImages = [],
testCanvas = document.createElement("canvas"),
testctx = testCanvas.getContext("2d"),
canvas = options.canvas || doc.createElement('canvas');
function createShape(ctx, args) {
ctx.beginPath();
args.forEach(function(arg) {
ctx[arg.name].apply(ctx, arg['arguments']);
});
ctx.closePath();
}
function safeImage(item) {
if (safeImages.indexOf(item['arguments'][0].src ) === -1) {
testctx.drawImage(item['arguments'][0], 0, 0);
try {
testctx.getImageData(0, 0, 1, 1);
} catch(e) {
testCanvas = doc.createElement("canvas");
testctx = testCanvas.getContext("2d");
return false;
}
safeImages.push(item['arguments'][0].src);
}
return true;
}
function isTransparent(backgroundColor) {
return (backgroundColor === "transparent" || backgroundColor === "rgba(0, 0, 0, 0)");
}
function renderItem(ctx, item) {
switch(item.type){
case "variable":
ctx[item.name] = item['arguments'];
break;
case "function":
if (item.name === "createPattern") {
if (item['arguments'][0].width > 0 && item['arguments'][0].height > 0) {
try {
ctx.fillStyle = ctx.createPattern(item['arguments'][0], "repeat");
}
catch(e) {
h2clog("html2canvas: Renderer: Error creating pattern", e.message);
}
}
} else if (item.name === "drawShape") {
createShape(ctx, item['arguments']);
} else if (item.name === "drawImage") {
if (item['arguments'][8] > 0 && item['arguments'][7] > 0) {
if (!options.taintTest || (options.taintTest && safeImage(item))) {
ctx.drawImage.apply( ctx, item['arguments'] );
}
}
} else {
ctx[item.name].apply(ctx, item['arguments']);
}
break;
}
}
return function(zStack, options, doc, queue, _html2canvas) {
var ctx = canvas.getContext("2d"),
storageContext,
i,
queueLen,
newCanvas,
bounds,
fstyle;
canvas.width = canvas.style.width = options.width || zStack.ctx.width;
canvas.height = canvas.style.height = options.height || zStack.ctx.height;
fstyle = ctx.fillStyle;
ctx.fillStyle = (isTransparent(zStack.backgroundColor) && options.background !== undefined) ? options.background : zStack.backgroundColor;
ctx.fillRect(0, 0, canvas.width, canvas.height);
ctx.fillStyle = fstyle;
if ( options.svgRendering && zStack.svgRender !== undefined ) {
// TODO: enable async rendering to support this
ctx.drawImage( zStack.svgRender, 0, 0 );
} else {
for ( i = 0, queueLen = queue.length; i < queueLen; i+=1 ) {
storageContext = queue.splice(0, 1)[0];
storageContext.canvasPosition = storageContext.canvasPosition || {};
// set common settings for canvas
ctx.textBaseline = "bottom";
if (storageContext.clip){
ctx.save();
ctx.beginPath();
// console.log(storageContext);
ctx.rect(storageContext.clip.left, storageContext.clip.top, storageContext.clip.width, storageContext.clip.height);
ctx.clip();
}
if (storageContext.ctx.storage) {
storageContext.ctx.storage.forEach(renderItem.bind(null, ctx));
}
if (storageContext.clip){
ctx.restore();
}
}
}
h2clog("html2canvas: Renderer: Canvas renderer done - returning canvas obj");
queueLen = options.elements.length;
if (queueLen === 1) {
if (typeof options.elements[0] === "object" && options.elements[0].nodeName !== "BODY") {
// crop image to the bounds of selected (single) element
bounds = _html2canvas.Util.Bounds(options.elements[0]);
newCanvas = doc.createElement('canvas');
newCanvas.width = bounds.width;
newCanvas.height = bounds.height;
ctx = newCanvas.getContext("2d");
ctx.drawImage(canvas, Math.floor(bounds.left), Math.floor(bounds.top), Math.floor(bounds.width), Math.floor(bounds.height), 0, 0, Math.floor(bounds.width), Math.floor(bounds.height));
canvas = null;
return newCanvas;
}
}
return canvas;
};
};
})(window,document);
/* node_modules/async/lib/async.js */
/*global setImmediate: false, setTimeout: false, console: false */
(function () {
var async = {};
// global on the server, window in the browser
var root, previous_async;
root = this;
if (root != null) {
previous_async = root.async;
}
async.noConflict = function () {
root.async = previous_async;
return async;
};
function only_once(fn) {
var called = false;
return function() {
if (called) throw new Error("Callback was already called.");
called = true;
fn.apply(root, arguments);
}
}
//// cross-browser compatiblity functions ////
var _each = function (arr, iterator) {
if (arr.forEach) {
return arr.forEach(iterator);
}
for (var i = 0; i < arr.length; i += 1) {
iterator(arr[i], i, arr);
}
};
var _map = function (arr, iterator) {
if (arr.map) {
return arr.map(iterator);
}
var results = [];
_each(arr, function (x, i, a) {
results.push(iterator(x, i, a));
});
return results;
};
var _reduce = function (arr, iterator, memo) {
if (arr.reduce) {
return arr.reduce(iterator, memo);
}
_each(arr, function (x, i, a) {
memo = iterator(memo, x, i, a);
});
return memo;
};
var _keys = function (obj) {
if (Object.keys) {
return Object.keys(obj);
}
var keys = [];
for (var k in obj) {
if (obj.hasOwnProperty(k)) {
keys.push(k);
}
}
return keys;
};
//// exported async module functions ////
//// nextTick implementation with browser-compatible fallback ////
if (typeof process === 'undefined' || !(process.nextTick)) {
if (typeof setImmediate === 'function') {
async.nextTick = function (fn) {
// not a direct alias for IE10 compatibility
setImmediate(fn);
};
async.setImmediate = async.nextTick;
}
else {
async.nextTick = function (fn) {
setTimeout(fn, 0);
};
async.setImmediate = async.nextTick;
}
}
else {
async.nextTick = process.nextTick;
if (typeof setImmediate !== 'undefined') {
async.setImmediate = setImmediate;
}
else {
async.setImmediate = async.nextTick;
}
}
async.each = function (arr, iterator, callback) {
callback = callback || function () {};
if (!arr.length) {
return callback();
}
var completed = 0;
_each(arr, function (x) {
iterator(x, only_once(function (err) {
if (err) {
callback(err);
callback = function () {};
}
else {
completed += 1;
if (completed >= arr.length) {
callback(null);
}
}
}));
});
};
async.forEach = async.each;
async.eachSeries = function (arr, iterator, callback) {
callback = callback || function () {};
if (!arr.length) {
return callback();
}
var completed = 0;
var iterate = function () {
iterator(arr[completed], function (err) {
if (err) {
callback(err);
callback = function () {};
}
else {
completed += 1;
if (completed >= arr.length) {
callback(null);
}
else {
iterate();
}
}
});
};
iterate();
};
async.forEachSeries = async.eachSeries;
async.eachLimit = function (arr, limit, iterator, callback) {
var fn = _eachLimit(limit);
fn.apply(null, [arr, iterator, callback]);
};
async.forEachLimit = async.eachLimit;
var _eachLimit = function (limit) {
return function (arr, iterator, callback) {
callback = callback || function () {};
if (!arr.length || limit <= 0) {
return callback();
}
var completed = 0;
var started = 0;
var running = 0;
(function replenish () {
if (completed >= arr.length) {
return callback();
}
while (running < limit && started < arr.length) {
started += 1;
running += 1;
iterator(arr[started - 1], function (err) {
if (err) {
callback(err);
callback = function () {};
}
else {
completed += 1;
running -= 1;
if (completed >= arr.length) {
callback();
}
else {
replenish();
}
}
});
}
})();
};
};
var doParallel = function (fn) {
return function () {
var args = Array.prototype.slice.call(arguments);
return fn.apply(null, [async.each].concat(args));
};
};
var doParallelLimit = function(limit, fn) {
return function () {
var args = Array.prototype.slice.call(arguments);
return fn.apply(null, [_eachLimit(limit)].concat(args));
};
};
var doSeries = function (fn) {
return function () {
var args = Array.prototype.slice.call(arguments);
return fn.apply(null, [async.eachSeries].concat(args));
};
};
var _asyncMap = function (eachfn, arr, iterator, callback) {
var results = [];
arr = _map(arr, function (x, i) {
return {index: i, value: x};
});
eachfn(arr, function (x, callback) {
iterator(x.value, function (err, v) {
results[x.index] = v;
callback(err);
});
}, function (err) {
callback(err, results);
});
};
async.map = doParallel(_asyncMap);
async.mapSeries = doSeries(_asyncMap);
async.mapLimit = function (arr, limit, iterator, callback) {
return _mapLimit(limit)(arr, iterator, callback);
};
var _mapLimit = function(limit) {
return doParallelLimit(limit, _asyncMap);
};
// reduce only has a series version, as doing reduce in parallel won't
// work in many situations.
async.reduce = function (arr, memo, iterator, callback) {
async.eachSeries(arr, function (x, callback) {
iterator(memo, x, function (err, v) {
memo = v;
callback(err);
});
}, function (err) {
callback(err, memo);
});
};
// inject alias
async.inject = async.reduce;
// foldl alias
async.foldl = async.reduce;
async.reduceRight = function (arr, memo, iterator, callback) {
var reversed = _map(arr, function (x) {
return x;
}).reverse();
async.reduce(reversed, memo, iterator, callback);
};
// foldr alias
async.foldr = async.reduceRight;
var _filter = function (eachfn, arr, iterator, callback) {
var results = [];
arr = _map(arr, function (x, i) {
return {index: i, value: x};
});
eachfn(arr, function (x, callback) {
iterator(x.value, function (v) {
if (v) {
results.push(x);
}
callback();
});
}, function (err) {
callback(_map(results.sort(function (a, b) {
return a.index - b.index;
}), function (x) {
return x.value;
}));
});
};
async.filter = doParallel(_filter);
async.filterSeries = doSeries(_filter);
// select alias
async.select = async.filter;
async.selectSeries = async.filterSeries;
var _reject = function (eachfn, arr, iterator, callback) {
var results = [];
arr = _map(arr, function (x, i) {
return {index: i, value: x};
});
eachfn(arr, function (x, callback) {
iterator(x.value, function (v) {
if (!v) {
results.push(x);
}
callback();
});
}, function (err) {
callback(_map(results.sort(function (a, b) {
return a.index - b.index;
}), function (x) {
return x.value;
}));
});
};
async.reject = doParallel(_reject);
async.rejectSeries = doSeries(_reject);
var _detect = function (eachfn, arr, iterator, main_callback) {
eachfn(arr, function (x, callback) {
iterator(x, function (result) {
if (result) {
main_callback(x);
main_callback = function () {};
}
else {
callback();
}
});
}, function (err) {
main_callback();
});
};
async.detect = doParallel(_detect);
async.detectSeries = doSeries(_detect);
async.some = function (arr, iterator, main_callback) {
async.each(arr, function (x, callback) {
iterator(x, function (v) {
if (v) {
main_callback(true);
main_callback = function () {};
}
callback();
});
}, function (err) {
main_callback(false);
});
};
// any alias
async.any = async.some;
async.every = function (arr, iterator, main_callback) {
async.each(arr, function (x, callback) {
iterator(x, function (v) {
if (!v) {
main_callback(false);
main_callback = function () {};
}
callback();
});
}, function (err) {
main_callback(true);
});
};
// all alias
async.all = async.every;
async.sortBy = function (arr, iterator, callback) {
async.map(arr, function (x, callback) {
iterator(x, function (err, criteria) {
if (err) {
callback(err);
}
else {
callback(null, {value: x, criteria: criteria});
}
});
}, function (err, results) {
if (err) {
return callback(err);
}
else {
var fn = function (left, right) {
var a = left.criteria, b = right.criteria;
return a < b ? -1 : a > b ? 1 : 0;
};
callback(null, _map(results.sort(fn), function (x) {
return x.value;
}));
}
});
};
async.auto = function (tasks, callback) {
callback = callback || function () {};
var keys = _keys(tasks);
if (!keys.length) {
return callback(null);
}
var results = {};
var listeners = [];
var addListener = function (fn) {
listeners.unshift(fn);
};
var removeListener = function (fn) {
for (var i = 0; i < listeners.length; i += 1) {
if (listeners[i] === fn) {
listeners.splice(i, 1);
return;
}
}
};
var taskComplete = function () {
_each(listeners.slice(0), function (fn) {
fn();
});
};
addListener(function () {
if (_keys(results).length === keys.length) {
callback(null, results);
callback = function () {};
}
});
_each(keys, function (k) {
var task = (tasks[k] instanceof Function) ? [tasks[k]]: tasks[k];
var taskCallback = function (err) {
var args = Array.prototype.slice.call(arguments, 1);
if (args.length <= 1) {
args = args[0];
}
if (err) {
var safeResults = {};
_each(_keys(results), function(rkey) {
safeResults[rkey] = results[rkey];
});
safeResults[k] = args;
callback(err, safeResults);
// stop subsequent errors hitting callback multiple times
callback = function () {};
}
else {
results[k] = args;
async.setImmediate(taskComplete);
}
};
var requires = task.slice(0, Math.abs(task.length - 1)) || [];
var ready = function () {
return _reduce(requires, function (a, x) {
return (a && results.hasOwnProperty(x));
}, true) && !results.hasOwnProperty(k);
};
if (ready()) {
task[task.length - 1](taskCallback, results);
}
else {
var listener = function () {
if (ready()) {
removeListener(listener);
task[task.length - 1](taskCallback, results);
}
};
addListener(listener);
}
});
};
async.waterfall = function (tasks, callback) {
callback = callback || function () {};
if (tasks.constructor !== Array) {
var err = new Error('First argument to waterfall must be an array of functions');
return callback(err);
}
if (!tasks.length) {
return callback();
}
var wrapIterator = function (iterator) {
return function (err) {
if (err) {
callback.apply(null, arguments);
callback = function () {};
}
else {
var args = Array.prototype.slice.call(arguments, 1);
var next = iterator.next();
if (next) {
args.push(wrapIterator(next));
}
else {
args.push(callback);
}
async.setImmediate(function () {
iterator.apply(null, args);
});
}
};
};
wrapIterator(async.iterator(tasks))();
};
var _parallel = function(eachfn, tasks, callback) {
callback = callback || function () {};
if (tasks.constructor === Array) {
eachfn.map(tasks, function (fn, callback) {
if (fn) {
fn(function (err) {
var args = Array.prototype.slice.call(arguments, 1);
if (args.length <= 1) {
args = args[0];
}
callback.call(null, err, args);
});
}
}, callback);
}
else {
var results = {};
eachfn.each(_keys(tasks), function (k, callback) {
tasks[k](function (err) {
var args = Array.prototype.slice.call(arguments, 1);
if (args.length <= 1) {
args = args[0];
}
results[k] = args;
callback(err);
});
}, function (err) {
callback(err, results);
});
}
};
async.parallel = function (tasks, callback) {
_parallel({ map: async.map, each: async.each }, tasks, callback);
};
async.parallelLimit = function(tasks, limit, callback) {
_parallel({ map: _mapLimit(limit), each: _eachLimit(limit) }, tasks, callback);
};
async.series = function (tasks, callback) {
callback = callback || function () {};
if (tasks.constructor === Array) {
async.mapSeries(tasks, function (fn, callback) {
if (fn) {
fn(function (err) {
var args = Array.prototype.slice.call(arguments, 1);
if (args.length <= 1) {
args = args[0];
}
callback.call(null, err, args);
});
}
}, callback);
}
else {
var results = {};
async.eachSeries(_keys(tasks), function (k, callback) {
tasks[k](function (err) {
var args = Array.prototype.slice.call(arguments, 1);
if (args.length <= 1) {
args = args[0];
}
results[k] = args;
callback(err);
});
}, function (err) {
callback(err, results);
});
}
};
async.iterator = function (tasks) {
var makeCallback = function (index) {
var fn = function () {
if (tasks.length) {
tasks[index].apply(null, arguments);
}
return fn.next();
};
fn.next = function () {
return (index < tasks.length - 1) ? makeCallback(index + 1): null;
};
return fn;
};
return makeCallback(0);
};
async.apply = function (fn) {
var args = Array.prototype.slice.call(arguments, 1);
return function () {
return fn.apply(
null, args.concat(Array.prototype.slice.call(arguments))
);
};
};
var _concat = function (eachfn, arr, fn, callback) {
var r = [];
eachfn(arr, function (x, cb) {
fn(x, function (err, y) {
r = r.concat(y || []);
cb(err);
});
}, function (err) {
callback(err, r);
});
};
async.concat = doParallel(_concat);
async.concatSeries = doSeries(_concat);
async.whilst = function (test, iterator, callback) {
if (test()) {
iterator(function (err) {
if (err) {
return callback(err);
}
async.whilst(test, iterator, callback);
});
}
else {
callback();
}
};
async.doWhilst = function (iterator, test, callback) {
iterator(function (err) {
if (err) {
return callback(err);
}
if (test()) {
async.doWhilst(iterator, test, callback);
}
else {
callback();
}
});
};
async.until = function (test, iterator, callback) {
if (!test()) {
iterator(function (err) {
if (err) {
return callback(err);
}
async.until(test, iterator, callback);
});
}
else {
callback();
}
};
async.doUntil = function (iterator, test, callback) {
iterator(function (err) {
if (err) {
return callback(err);
}
if (!test()) {
async.doUntil(iterator, test, callback);
}
else {
callback();
}
});
};
async.queue = function (worker, concurrency) {
if (concurrency === undefined) {
concurrency = 1;
}
function _insert(q, data, pos, callback) {
if(data.constructor !== Array) {
data = [data];
}
_each(data, function(task) {
var item = {
data: task,
callback: typeof callback === 'function' ? callback : null
};
if (pos) {
q.tasks.unshift(item);
} else {
q.tasks.push(item);
}
if (q.saturated && q.tasks.length === concurrency) {
q.saturated();
}
async.setImmediate(q.process);
});
}
var workers = 0;
var q = {
tasks: [],
concurrency: concurrency,
saturated: null,
empty: null,
drain: null,
push: function (data, callback) {
_insert(q, data, false, callback);
},
unshift: function (data, callback) {
_insert(q, data, true, callback);
},
process: function () {
if (workers < q.concurrency && q.tasks.length) {
var task = q.tasks.shift();
if (q.empty && q.tasks.length === 0) {
q.empty();
}
workers += 1;
var next = function () {
workers -= 1;
if (task.callback) {
task.callback.apply(task, arguments);
}
if (q.drain && q.tasks.length + workers === 0) {
q.drain();
}
q.process();
};
var cb = only_once(next);
worker(task.data, cb);
}
},
length: function () {
return q.tasks.length;
},
running: function () {
return workers;
}
};
return q;
};
async.cargo = function (worker, payload) {
var working = false,
tasks = [];
var cargo = {
tasks: tasks,
payload: payload,
saturated: null,
empty: null,
drain: null,
push: function (data, callback) {
if(data.constructor !== Array) {
data = [data];
}
_each(data, function(task) {
tasks.push({
data: task,
callback: typeof callback === 'function' ? callback : null
});
if (cargo.saturated && tasks.length === payload) {
cargo.saturated();
}
});
async.setImmediate(cargo.process);
},
process: function process() {
if (working) return;
if (tasks.length === 0) {
if(cargo.drain) cargo.drain();
return;
}
var ts = typeof payload === 'number'
? tasks.splice(0, payload)
: tasks.splice(0);
var ds = _map(ts, function (task) {
return task.data;
});
if(cargo.empty) cargo.empty();
working = true;
worker(ds, function () {
working = false;
var args = arguments;
_each(ts, function (data) {
if (data.callback) {
data.callback.apply(null, args);
}
});
process();
});
},
length: function () {
return tasks.length;
},
running: function () {
return working;
}
};
return cargo;
};
var _console_fn = function (name) {
return function (fn) {
var args = Array.prototype.slice.call(arguments, 1);
fn.apply(null, args.concat([function (err) {
var args = Array.prototype.slice.call(arguments, 1);
if (typeof console !== 'undefined') {
if (err) {
if (console.error) {
console.error(err);
}
}
else if (console[name]) {
_each(args, function (x) {
console[name](x);
});
}
}
}]));
};
};
async.log = _console_fn('log');
async.dir = _console_fn('dir');
/*async.info = _console_fn('info');
async.warn = _console_fn('warn');
async.error = _console_fn('error');*/
async.memoize = function (fn, hasher) {
var memo = {};
var queues = {};
hasher = hasher || function (x) {
return x;
};
var memoized = function () {
var args = Array.prototype.slice.call(arguments);
var callback = args.pop();
var key = hasher.apply(null, args);
if (key in memo) {
callback.apply(null, memo[key]);
}
else if (key in queues) {
queues[key].push(callback);
}
else {
queues[key] = [callback];
fn.apply(null, args.concat([function () {
memo[key] = arguments;
var q = queues[key];
delete queues[key];
for (var i = 0, l = q.length; i < l; i++) {
q[i].apply(null, arguments);
}
}]));
}
};
memoized.memo = memo;
memoized.unmemoized = fn;
return memoized;
};
async.unmemoize = function (fn) {
return function () {
return (fn.unmemoized || fn).apply(null, arguments);
};
};
async.times = function (count, iterator, callback) {
var counter = [];
for (var i = 0; i < count; i++) {
counter.push(i);
}
return async.map(counter, iterator, callback);
};
async.timesSeries = function (count, iterator, callback) {
var counter = [];
for (var i = 0; i < count; i++) {
counter.push(i);
}
return async.mapSeries(counter, iterator, callback);
};
async.compose = function (/* functions... */) {
var fns = Array.prototype.reverse.call(arguments);
return function () {
var that = this;
var args = Array.prototype.slice.call(arguments);
var callback = args.pop();
async.reduce(fns, args, function (newargs, fn, cb) {
fn.apply(that, newargs.concat([function () {
var err = arguments[0];
var nextargs = Array.prototype.slice.call(arguments, 1);
cb(err, nextargs);
}]))
},
function (err, results) {
callback.apply(that, [err].concat(results));
});
};
};
var _applyEach = function (eachfn, fns /*args...*/) {
var go = function () {
var that = this;
var args = Array.prototype.slice.call(arguments);
var callback = args.pop();
return eachfn(fns, function (fn, cb) {
fn.apply(that, args.concat([cb]));
},
callback);
};
if (arguments.length > 2) {
var args = Array.prototype.slice.call(arguments, 2);
return go.apply(this, args);
}
else {
return go;
}
};
async.applyEach = doParallel(_applyEach);
async.applyEachSeries = doSeries(_applyEach);
async.forever = function (fn, callback) {
function next(err) {
if (err) {
if (callback) {
return callback(err);
}
throw err;
}
fn(next);
}
next();
};
//*** Yaron: added since when using on paged that use requriejs this does not get registered (maybe since we do it aftermath)
root.async = async;
/*
// AMD / RequireJS
if (typeof define !== 'undefined' && define.amd) {
define([], function () {
return async;
});
}
// Node.js
else if (typeof module !== 'undefined' && module.exports) {
module.exports = async;
}
// included directly via <script> tag
else {
root.async = async;
}
*/
}());
/* bower_components/fabric/dist/all.js */
/* build: `node build.js modules=ALL exclude=gestures` */
/*! Fabric.js Copyright 2008-2013, Printio (Juriy Zaytsev, Maxim Chernyak) */
var exports = exports || {};
var fabric = fabric || { version: "1.3.0" };
// make sure exports.fabric is always defined when used as 'global' later scopes
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("<!DOCTYPE html><html><head></head><body></body></html>");
fabric.window = fabric.document.createWindow();
}
/**
* True when in environment that supports touch events
* @type boolean
*/
fabric.isTouchSupported = "ontouchstart" in fabric.document.documentElement;
/**
* True when in environment that's probably Node.js
* @type boolean
*/
fabric.isLikelyNode = typeof Buffer !== 'undefined' && typeof window === 'undefined';
/*!
* Copyright (c) 2009 Simo Kinnunen.
* Licensed under the MIT license.
*/
var Cufon = (function() {
/** @ignore */
var api = function() {
return api.replace.apply(null, arguments);
};
/** @ignore */
var DOM = api.DOM = {
ready: (function() {
var complete = false, readyStatus = { loaded: 1, complete: 1 };
var queue = [], /** @ignore */ 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);
};
})()
};
/** @ignore */
var CSS = api.CSS = /** @ignore */ {
/** @ignore */
Size: function(value, base) {
this.value = parseFloat(value);
this.unit = String(value).match(/[a-z%]*$/)[0] || 'px';
/** @ignore */
this.convert = function(value) {
return value / base * this.value;
};
/** @ignore */
this.convertFrom = function(value) {
return value / this.value * base;
};
/** @ignore */
this.toString = function() {
return this.value + this.unit;
};
},
/** @ignore */
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 <style> elements in document.styleSheets.
// Safari 2 also does not support Object.prototype.propertyIsEnumerable.
var styleElements = Object.prototype.propertyIsEnumerable ? elementsByTagName('style') : { length: 0 };
var linkElements = elementsByTagName('link');
DOM.ready(function() {
// These checks are actually only needed for WebKit-based browsers, but don't really hurt other browsers.
var linkStyles = 0, link;
for (var i = 0, l = linkElements.length; link = linkElements[i], i < l; ++i) {
// WebKit does not load alternate stylesheets.
if (!link.disabled && link.rel.toLowerCase() == 'stylesheet') ++linkStyles;
}
if (fabric.document.styleSheets.length >= styleElements.length + linkStyles) perform();
else setTimeout(arguments.callee, 10);
});
return function(listener) {
if (complete) listener();
else queue.push(listener);
};
})(),
/** @ignore */
supports: function(property, value) {
var checker = fabric.document.createElement('span').style;
if (checker[property] === undefined) return false;
checker[property] = value;
return checker[property] === value;
},
/** @ignore */
textAlign: function(word, style, position, wordCount) {
if (style.get('textAlign') == 'right') {
if (position > 0) word = ' ' + word;
}
else if (position < wordCount - 1) word += ' ';
return word;
},
/** @ignore */
textDecoration: function(el, style) {
if (!style) style = this.getStyle(el);
var types = {
underline: null,
overline: null,
'line-through': null
};
for (var search = el; search.parentNode && search.parentNode.nodeType == 1; ) {
var foundAll = true;
for (var type in types) {
if (types[type]) continue;
if (style.get('textDecoration').indexOf(type) != -1) types[type] = style.get('color');
foundAll = false;
}
if (foundAll) break; // this is rather unlikely to happen
style = this.getStyle(search = search.parentNode);
}
return types;
},
textShadow: cached(function(value) {
if (value == 'none') return null;
var shadows = [], currentShadow = {}, result, offCount = 0;
var re = /(#[a-f0-9]+|[a-z]+\(.*?\)|[a-z]+)|(-?[\d.]+[a-z%]*)|,/ig;
while (result = re.exec(value)) {
if (result[0] == ',') {
shadows.push(currentShadow);
currentShadow = {}, offCount = 0;
}
else if (result[1]) {
currentShadow.color = result[1];
}
else {
currentShadow[[ 'offX', 'offY', 'blur' ][offCount++]] = result[2];
}
}
shadows.push(currentShadow);
return shadows;
}),
color: cached(function(value) {
var parsed = {};
parsed.color = value.replace(/^rgba\((.*?),\s*([\d.]+)\)/, function($0, $1, $2) {
parsed.opacity = parseFloat($2);
return 'rgb(' + $1 + ')';
});
return parsed;
}),
/** @ignore */
textTransform: function(text, style) {
return text[{
uppercase: 'toUpperCase',
lowercase: 'toLowerCase'
}[style.get('textTransform')] || 'toString']();
}
};
function Font(data) {
var face = this.face = data.face;
this.glyphs = data.glyphs;
this.w = data.w;
this.baseSize = parseInt(face['units-per-em'], 10);
this.family = face['font-family'].toLowerCase();
this.weight = face['font-weight'];
this.style = face['font-style'] || 'normal';
this.viewBox = (function () {
var parts = face.bbox.split(/\s+/);
var box = {
minX: parseInt(parts[0], 10),
minY: parseInt(parts[1], 10),
maxX: parseInt(parts[2], 10),
maxY: parseInt(parts[3], 10)
};
box.width = box.maxX - box.minX,
box.height = box.maxY - box.minY;
/** @ignore */
box.toString = function() {
return [ this.minX, this.minY, this.width, this.height ].join(' ');
};
return box;
})();
this.ascent = -parseInt(face.ascent, 10);
this.descent = -parseInt(face.descent, 10);
this.height = -this.ascent + this.descent;
}
function FontFamily() {
var styles = {}, mapping = {
oblique: 'italic',
italic: 'oblique'
};
this.add = function(font) {
(styles[font.style] || (styles[font.style] = {}))[font.weight] = font;
};
/** @ignore */
this.get = function(style, weight) {
var weights = styles[style] || styles[mapping[style]]
|| styles.normal || styles.italic || styles.oblique;
if (!weights) return null;
// we don't have to worry about "bolder" and "lighter"
// because IE's currentStyle returns a numeric value for it,
// and other browsers use the computed value anyway
weight = {
normal: 400,
bold: 700
}[weight] || parseInt(weight, 10);
if (weights[weight]) return weights[weight];
// http://www.w3.org/TR/CSS21/fonts.html#propdef-font-weight
// Gecko uses x99/x01 for lighter/bolder
var up = {
1: 1,
99: 0
}[weight % 100], alts = [], min, max;
if (up === undefined) up = weight > 400;
if (weight == 500) weight = 400;
for (var alt in weights) {
alt = parseInt(alt, 10);
if (!min || alt < min) min = alt;
if (!max || alt > max) max = alt;
alts.push(alt);
}
if (weight < min) weight = min;
if (weight > max) weight = max;
alts.sort(function(a, b) {
return (up
? (a > weight && b > weight) ? a < b : a > b
: (a < weight && b < weight) ? a > b : a < b) ? -1 : 1;
});
return weights[alts[0]];
};
}
function HoverHandler() {
function contains(node, anotherNode) {
if (node.contains) return node.contains(anotherNode);
return node.compareDocumentPosition(anotherNode) & 16;
}
function onOverOut(e) {
var related = e.relatedTarget;
if (!related || contains(this, related)) return;
trigger(this);
}
function onEnterLeave(e) {
trigger(this);
}
function trigger(el) {
// A timeout is needed so that the event can actually "happen"
// before replace is triggered. This ensures that styles are up
// to date.
setTimeout(function() {
api.replace(el, sharedStorage.get(el).options, true);
}, 10);
}
this.attach = function(el) {
if (el.onmouseenter === undefined) {
addEvent(el, 'mouseover', onOverOut);
addEvent(el, 'mouseout', onOverOut);
}
else {
addEvent(el, 'mouseenter', onEnterLeave);
addEvent(el, 'mouseleave', onEnterLeave);
}
};
}
function Storage() {
var map = {}, at = 0;
function identify(el) {
return el.cufid || (el.cufid = ++at);
}
/** @ignore */
this.get = function(el) {
var id = identify(el);
return map[id] || (map[id] = {});
};
}
function Style(style) {
var custom = {}, sizes = {};
this.get = function(property) {
return custom[property] != undefined ? custom[property] : style[property];
};
this.getSize = function(property, base) {
return sizes[property] || (sizes[property] = new CSS.Size(this.get(property), base));
};
this.extend = function(styles) {
for (var property in styles) custom[property] = styles[property];
return this;
};
}
function addEvent(el, type, listener) {
if (el.addEventListener) {
el.addEventListener(type, listener, false);
}
else if (el.attachEvent) {
el.attachEvent('on' + type, function() {
return listener.call(el, fabric.window.event);
});
}
}
function attach(el, options) {
var storage = sharedStorage.get(el);
if (storage.options) return el;
if (options.hover && options.hoverables[el.nodeName.toLowerCase()]) {
hoverHandler.attach(el);
}
storage.options = options;
return el;
}
function cached(fun) {
var cache = {};
return function(key) {
if (!cache.hasOwnProperty(key)) cache[key] = fun.apply(null, arguments);
return cache[key];
};
}
function getFont(el, style) {
if (!style) style = CSS.getStyle(el);
var families = CSS.quotedList(style.get('fontFamily').toLowerCase()), family;
for (var i = 0, l = families.length; i < l; ++i) {
family = families[i];
if (fonts[family]) return fonts[family].get(style.get('fontStyle'), style.get('fontWeight'));
}
return null;
}
function elementsByTagName(query) {
return fabric.document.getElementsByTagName(query);
}
function merge() {
var merged = {}, key;
for (var i = 0, l = arguments.length; i < l; ++i) {
for (key in arguments[i]) merged[key] = arguments[i][key];
}
return merged;
}
function process(font, text, style, options, node, el) {
var separate = options.separate;
if (separate == 'none') return engines[options.engine].apply(null, arguments);
var fragment = fabric.document.createDocumentFragment(), processed;
var parts = text.split(separators[separate]), needsAligning = (separate == 'words');
if (needsAligning && HAS_BROKEN_REGEXP) {
// @todo figure out a better way to do this
if (/^\s/.test(text)) parts.unshift('');
if (/\s$/.test(text)) parts.push('');
}
for (var i = 0, l = parts.length; i < l; ++i) {
processed = engines[options.engine](font,
needsAligning ? CSS.textAlign(parts[i], style, i, l) : parts[i],
style, options, node, el, i < l - 1);
if (processed) fragment.appendChild(processed);
}
return fragment;
}
/** @ignore */
function replaceElement(el, options) {
var font, style, nextNode, redraw;
for (var node = attach(el, options).firstChild; node; node = nextNode) {
nextNode = node.nextSibling;
redraw = false;
if (node.nodeType == 1) {
if (!node.firstChild) continue;
if (!/cufon/.test(node.className)) {
arguments.callee(node, options);
continue;
}
else redraw = true;
}
if (!style) style = CSS.getStyle(el).extend(options);
if (!font) font = getFont(el, style);
if (!font) continue;
if (redraw) {
engines[options.engine](font, null, style, options, node, el);
continue;
}
var text = node.data;
//for some reason, the carriage return is not stripped by IE but "\n" is, so let's keep \r as a new line marker...
if (typeof G_vmlCanvasManager != 'undefined') {
text = text.replace(/\r/g, "\n");
}
if (text === '') continue;
var processed = process(font, text, style, options, node, el);
if (processed) node.parentNode.replaceChild(processed, node);
else node.parentNode.removeChild(node);
}
}
var HAS_BROKEN_REGEXP = ' '.split(/\s+/).length == 0;
var sharedStorage = new Storage();
var hoverHandler = new HoverHandler();
var replaceHistory = [];
var engines = {}, fonts = {}, defaultOptions = {
engine: null,
//fontScale: 1,
//fontScaling: false,
hover: false,
hoverables: {
a: true
},
printable: true,
//rotation: 0,
//selectable: false,
selector: (
fabric.window.Sizzle
|| (fabric.window.jQuery && function(query) { return jQuery(query); }) // avoid noConflict issues
|| (fabric.window.dojo && dojo.query)
|| (fabric.window.$$ && function(query) { return $$(query); })
|| (fabric.window.$ && function(query) { return $(query); })
|| (fabric.document.querySelectorAll && function(query) { return fabric.document.querySelectorAll(query); })
|| elementsByTagName
),
separate: 'words', // 'none' and 'characters' are also accepted
textShadow: 'none'
};
var separators = {
words: /\s+/,
characters: ''
};
/** @ignore */
api.now = function() {
DOM.ready();
return api;
};
/** @ignore */
api.refresh = function() {
var currentHistory = replaceHistory.splice(0, replaceHistory.length);
for (var i = 0, l = currentHistory.length; i < l; ++i) {
api.replace.apply(null, currentHistory[i]);
}
return api;
};
/** @ignore */
api.registerEngine = function(id, engine) {
if (!engine) return api;
engines[id] = engine;
return api.set('engine', id);
};
/** @ignore */
api.registerFont = function(data) {
var font = new Font(data), family = font.family;
if (!fonts[family]) fonts[family] = new FontFamily();
fonts[family].add(font);
return api.set('fontFamily', '"' + family + '"');
};
/** @ignore */
api.replace = function(elements, options, ignoreHistory) {
options = merge(defaultOptions, options);
if (!options.engine) return api; // there's no browser support so we'll just stop here
if (typeof options.textShadow == 'string' && options.textShadow)
options.textShadow = CSS.textShadow(options.textShadow);
if (!ignoreHistory) replaceHistory.push(arguments);
if (elements.nodeType || typeof elements == 'string') elements = [ elements ];
CSS.ready(function() {
for (var i = 0, l = elements.length; i < l; ++i) {
var el = elements[i];
if (typeof el == 'string') api.replace(options.selector(el), options, true);
else replaceElement(el, options);
}
});
return api;
};
/** @ignore */
api.replaceElement = function(el, options) {
options = merge(defaultOptions, options);
if (typeof options.textShadow == 'string' && options.textShadow)
options.textShadow = CSS.textShadow(options.textShadow);
return replaceElement(el, options);
};
api.engines = engines;
api.fonts = fonts;
/** @ignore */
api.getOptions = function() {
return merge(defaultOptions);
};
/** @ignore */
api.set = function(option, value) {
defaultOptions[option] = value;
return api;
};
return api;
})();
Cufon.registerEngine('canvas', (function() {
// Safari 2 doesn't support .apply() on native methods
var HAS_INLINE_BLOCK = Cufon.CSS.supports('display', 'inline-block');
// Firefox 2 w/ non-strict doctype (almost standards mode)
var HAS_BROKEN_LINEHEIGHT = !HAS_INLINE_BLOCK && (fabric.document.compatMode == 'BackCompat' || /frameset|transitional/i.test(fabric.document.doctype.publicId));
var styleSheet = fabric.document.createElement('style');
styleSheet.type = 'text/css';
var textNode = fabric.document.createTextNode(
'.cufon-canvas{text-indent:0}' +
'@media screen,projection{' +
'.cufon-canvas{display:inline;display:inline-block;position:relative;vertical-align:middle' +
(HAS_BROKEN_LINEHEIGHT
? ''
: ';font-size:1px;line-height:1px') +
'}.cufon-canvas .cufon-alt{display:-moz-inline-box;display:inline-block;width:0;height:0;overflow:hidden}' +
(HAS_INLINE_BLOCK
? '.cufon-canvas canvas{position:relative}'
: '.cufon-canvas canvas{position:absolute}') +
'}' +
'@media print{' +
'.cufon-canvas{padding:0 !important}' +
'.cufon-canvas canvas{display:none}' +
'.cufon-canvas .cufon-alt{display:inline}' +
'}'
)
try {
styleSheet.appendChild(textNode);
} catch(e) {
//IE8- can't do this...
styleSheet.setAttribute("type", "text/css");
styleSheet.styleSheet.cssText = textNode.data;
}
fabric.document.getElementsByTagName('head')[0].appendChild(styleSheet);
function generateFromVML(path, context) {
var atX = 0, atY = 0;
var code = [], re = /([mrvxe])([^a-z]*)/g, match;
generate: for (var i = 0; match = re.exec(path); ++i) {
var c = match[2].split(',');
switch (match[1]) {
case 'v':
code[i] = { m: 'bezierCurveTo', a: [ atX + ~~c[0], atY + ~~c[1], atX + ~~c[2], atY + ~~c[3], atX += ~~c[4], atY += ~~c[5] ] };
break;
case 'r':
code[i] = { m: 'lineTo', a: [ atX += ~~c[0], atY += ~~c[1] ] };
break;
case 'm':
code[i] = { m: 'moveTo', a: [ atX = ~~c[0], atY = ~~c[1] ] };
break;
case 'x':
code[i] = { m: 'closePath', a: [] };
break;
case 'e':
break generate;
}
context[code[i].m].apply(context, code[i].a);
}
return code;
}
function interpret(code, context) {
for (var i = 0, l = code.length; i < l; ++i) {
var line = code[i];
context[line.m].apply(context, line.a);
}
}
return function(font, text, style, options, node, el) {
var redraw = (text === null);
var viewBox = font.viewBox;
var size = style.getSize('fontSize', font.baseSize);
var letterSpacing = style.get('letterSpacing');
letterSpacing = (letterSpacing == 'normal') ? 0 : size.convertFrom(parseInt(letterSpacing, 10));
var expandTop = 0, expandRight = 0, expandBottom = 0, expandLeft = 0;
var shadows = options.textShadow, shadowOffsets = [];
Cufon.textOptions.shadowOffsets = [ ];
Cufon.textOptions.shadows = null;
if (shadows) {
Cufon.textOptions.shadows = shadows;
for (var i = 0, l = shadows.length; i < l; ++i) {
var shadow = shadows[i];
var x = size.convertFrom(parseFloat(shadow.offX));
var y = size.convertFrom(parseFloat(shadow.offY));
shadowOffsets[i] = [ x, y ];
//if (y < expandTop) expandTop = y;
//if (x > expandRight) expandRight = x;
//if (y > expandBottom) expandBottom = y;
//if (x < expandLeft) expandLeft = x;
}
}
var chars = Cufon.CSS.textTransform(redraw ? node.alt : text, style).split('');
var width = 0, lastWidth = null;
var maxWidth = 0, lines = 1, lineWidths = [ ];
for (var i = 0, l = chars.length; i < l; ++i) {
if (chars[i] === '\n') {
lines++;
if (width > maxWidth) {
maxWidth = width;
}
lineWidths.push(width);
width = 0;
continue;
}
var glyph = font.glyphs[chars[i]] || font.missingGlyph;
if (!glyph) continue;
width += lastWidth = Number(glyph.w || font.w) + letterSpacing;
}
lineWidths.push(width);
width = Math.max(maxWidth, width);
var lineOffsets = [ ];
for (var i = lineWidths.length; i--; ) {
lineOffsets[i] = width - lineWidths[i];
}
if (lastWidth === null) return null; // there's nothing to render
expandRight += (viewBox.width - lastWidth);
expandLeft += viewBox.minX;
var wrapper, canvas;
if (redraw) {
wrapper = node;
canvas = node.firstChild;
}
else {
wrapper = fabric.document.createElement('span');
wrapper.className = 'cufon cufon-canvas';
wrapper.alt = text;
canvas = fabric.document.createElement('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);
}
}
var wStyle = wrapper.style;
var cStyle = canvas.style || { };
var height = size.convert(viewBox.height - expandTop + expandBottom);
var roundedHeight = Math.ceil(height);
var roundingFactor = roundedHeight / height;
canvas.width = Math.ceil(size.convert(width + expandRight - expandLeft) * roundingFactor);
canvas.height = roundedHeight;
expandTop += viewBox.minY;
cStyle.top = Math.round(size.convert(expandTop - font.ascent)) + 'px';
cStyle.left = Math.round(size.convert(expandLeft)) + 'px';
var _width = Math.ceil(size.convert(width * roundingFactor));
var wrapperWidth = _width + 'px';
var _height = size.convert(font.height);
var totalLineHeight = (options.lineHeight - 1) * size.convert(-font.ascent / 5) * (lines - 1);
Cufon.textOptions.width = _width;
Cufon.textOptions.height = (_height * lines) + totalLineHeight;
Cufon.textOptions.lines = lines;
Cufon.textOptions.totalLineHeight = totalLineHeight;
if (HAS_INLINE_BLOCK) {
wStyle.width = wrapperWidth;
wStyle.height = _height + 'px';
}
else {
wStyle.paddingLeft = wrapperWidth;
wStyle.paddingBottom = (_height - 1) + 'px';
}
var g = Cufon.textOptions.context || canvas.getContext('2d'),
scale = roundedHeight / viewBox.height;
Cufon.textOptions.fontAscent = font.ascent * scale;
Cufon.textOptions.boundaries = null;
for (var offsets = Cufon.textOptions.shadowOffsets, i = shadowOffsets.length; i--; ) {
offsets[i] = [ shadowOffsets[i][0] * scale, shadowOffsets[i][1] * scale ];
}
g.save();
g.scale(scale, scale);
g.translate(
// we're at the center of an object and need to jump to the top left corner
// where first character is to be drawn
-expandLeft - ((1/scale * canvas.width) / 2) + (Cufon.fonts[font.family].offsetLeft || 0),
-expandTop - ((Cufon.textOptions.height / scale) / 2) + (Cufon.fonts[font.family].offsetTop || 0)
);
g.lineWidth = font.face['underline-thickness'];
g.save();
function line(y, color) {
g.strokeStyle = color;
g.beginPath();
g.moveTo(0, y);
g.lineTo(width, y);
g.stroke();
}
var textDecoration = Cufon.getTextDecoration(options),
isItalic = options.fontStyle === 'italic';
function renderBackground() {
g.save();
var left = 0, lineNum = 0, boundaries = [{ left: 0 }];
if (options.backgroundColor) {
g.save();
g.fillStyle = options.backgroundColor;
g.translate(0, font.ascent);
g.fillRect(0, 0, width + 10, (-font.ascent + font.descent) * lines);
g.restore();
}
if (options.textAlign === 'right') {
g.translate(lineOffsets[lineNum], 0);
boundaries[0].left = lineOffsets[lineNum] * scale;
}
else if (options.textAlign === 'center') {
g.translate(lineOffsets[lineNum] / 2, 0);
boundaries[0].left = lineOffsets[lineNum] / 2 * scale;
}
for (var i = 0, l = chars.length; i < l; ++i) {
if (chars[i] === '\n') {
lineNum++;
var topOffset = -font.ascent - ((font.ascent / 5) * options.lineHeight);
var boundary = boundaries[boundaries.length - 1];
var nextBoundary = { left: 0 };
boundary.width = left * scale;
boundary.height = (-font.ascent + font.descent) * scale;
if (options.textAlign === 'right') {
g.translate(-width, topOffset);
g.translate(lineOffsets[lineNum], 0);
nextBoundary.left = lineOffsets[lineNum] * scale;
}
else if (options.textAlign === 'center') {
// offset to the start of text in previous line AND half of its offset
// (essentially moving caret to the left edge of bounding box)
g.translate(-left - (lineOffsets[lineNum - 1] / 2), topOffset);
g.translate(lineOffsets[lineNum] / 2, 0);
nextBoundary.left = lineOffsets[lineNum] / 2 * scale;
}
else {
g.translate(-left, topOffset);
}
/* push next boundary (for the next line) */
boundaries.push(nextBoundary);
left = 0;
continue;
}
var glyph = font.glyphs[chars[i]] || font.missingGlyph;
if (!glyph) continue;
var charWidth = Number(glyph.w || font.w) + letterSpacing;
// only draw text-background when there's some kind of value
if (options.textBackgroundColor) {
g.save();
g.fillStyle = options.textBackgroundColor;
g.translate(0, font.ascent);
g.fillRect(0, 0, charWidth + 10, -font.ascent + font.descent);
g.restore();
}
g.translate(charWidth, 0);
left += charWidth;
if (i == l-1) {
boundaries[boundaries.length - 1].width = left * scale;
boundaries[boundaries.length - 1].height = (-font.ascent + font.descent) * scale;
}
}
g.restore();
Cufon.textOptions.boundaries = boundaries;
}
function renderText(color) {
g.fillStyle = color || Cufon.textOptions.color || style.get('color');
var left = 0, lineNum = 0;
if (options.textAlign === 'right') {
g.translate(lineOffsets[lineNum], 0);
}
else if (options.textAlign === 'center') {
g.translate(lineOffsets[lineNum] / 2, 0);
}
for (var i = 0, l = chars.length; i < l; ++i) {
if (chars[i] === '\n') {
lineNum++;
var topOffset = -font.ascent - ((font.ascent / 5) * options.lineHeight);
if (options.textAlign === 'right') {
g.translate(-width, topOffset);
g.translate(lineOffsets[lineNum], 0);
}
else if (options.textAlign === 'center') {
// offset to the start of text in previous line AND half of its offset
// (essentially moving caret to the left edge of bounding box)
g.translate(-left - (lineOffsets[lineNum - 1] / 2), topOffset);
g.translate(lineOffsets[lineNum] / 2, 0);
}
else {
g.translate(-left, topOffset);
}
left = 0;
continue;
}
var glyph = font.glyphs[chars[i]] || font.missingGlyph;
if (!glyph) continue;
var charWidth = Number(glyph.w || font.w) + letterSpacing;
if (textDecoration) {
g.save();
g.strokeStyle = g.fillStyle;
// add 2x more thickness — closer to SVG rendering
g.lineWidth += g.lineWidth;
g.beginPath();
if (textDecoration.underline) {
g.moveTo(0, -font.face['underline-position'] + 0.5);
g.lineTo(charWidth, -font.face['underline-position'] + 0.5);
}
if (textDecoration.overline) {
g.moveTo(0, font.ascent + 0.5);
g.lineTo(charWidth, font.ascent + 0.5);
}
if (textDecoration['line-through']) {
g.moveTo(0, -font.descent + 0.5);
g.lineTo(charWidth, -font.descent + 0.5);
}
g.stroke();
g.restore();
}
if (isItalic) {
g.save();
g.transform(1, 0, -0.25, 1, 0, 0);
}
g.beginPath();
if (glyph.d) {
if (glyph.code) interpret(glyph.code, g);
else glyph.code = generateFromVML('m' + glyph.d, g);
}
g.fill();
if (options.strokeStyle) {
g.closePath();
g.save();
g.lineWidth = options.strokeWidth;
g.strokeStyle = options.strokeStyle;
g.stroke();
g.restore();
}
if (isItalic) {
g.restore();
}
g.translate(charWidth, 0);
left += charWidth;
}
}
g.save();
renderBackground();
if (shadows) {
for (var i = 0, l = shadows.length; i < l; ++i) {
var shadow = shadows[i];
g.save();
g.translate.apply(g, shadowOffsets[i]);
renderText(shadow.color);
g.restore();
}
}
renderText();
g.restore();
g.restore();
g.restore();
return wrapper;
};
})());
Cufon.registerEngine('vml', (function() {
if (!fabric.document.namespaces) return;
var canvasEl = fabric.document.createElement('canvas');
if (canvasEl && canvasEl.getContext && canvasEl.getContext.apply) return;
if (fabric.document.namespaces.cvml == null) {
fabric.document.namespaces.add('cvml', 'urn:schemas-microsoft-com:vml');
}
var check = fabric.document.createElement('cvml:shape');
check.style.behavior = 'url(#default#VML)';
if (!check.coordsize) return; // VML isn't supported
check = null;
fabric.document.write('<style type="text/css">' +
'.cufon-vml-canvas{text-indent:0}' +
'@media screen{' +
'cvml\\:shape,cvml\\:shadow{behavior:url(#default#VML);display:block;antialias:true;position:absolute}' +
'.cufon-vml-canvas{position:absolute;text-align:left}' +
'.cufon-vml{display:inline-block;position:relative;vertical-align:middle}' +
'.cufon-vml .cufon-alt{position:absolute;left:-10000in;font-size:1px}' +
'a .cufon-vml{cursor:pointer}' +
'}' +
'@media print{' +
'.cufon-vml *{display:none}' +
'.cufon-vml .cufon-alt{display:inline}' +
'}' +
'</style>');
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 '&nbsp;'),
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') {
/** @ignore */
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 =
/** @ignore */
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') {
/** @ignore */
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') {
/** @ignore */
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)
* @param {Any} values Values to log
*/
fabric.log = function() { };
/**
* Wrapper around `console.warn` (when available)
* @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);
};
}
}
(function(){
/**
* @private
* @param {String} eventName
* @param {Function} handler
*/
function _removeEventListener(eventName, handler) {
if (!this.__eventListeners[eventName]) return;
if (handler) {
fabric.util.removeFromArray(this.__eventListeners[eventName], handler);
}
else {
this.__eventListeners[eventName].length = 0;
}
}
/**
* Observes specified event
* @deprecated `observe` deprecated since 0.8.34 (use `on` instead)
* @memberOf fabric.Observable
* @alias on
* @param {String|Object} eventName Event name (eg. 'after:render') or object with key/value pairs (eg. {'after:render': handler, 'selection:cleared': handler})
* @param {Function} handler Function that receives a notification when an event of the specified type occurs
* @return {Self} thisArg
* @chainable
*/
function observe(eventName, handler) {
if (!this.__eventListeners) {
this.__eventListeners = { };
}
// one object with key/value pairs was passed
if (arguments.length === 1) {
for (var prop in eventName) {
this.on(prop, eventName[prop]);
}
}
else {
if (!this.__eventListeners[eventName]) {
this.__eventListeners[eventName] = [ ];
}
this.__eventListeners[eventName].push(handler);
}
return this;
}
/**
* Stops event observing for a particular event handler
* @deprecated `stopObserving` deprecated since 0.8.34 (use `off` instead)
* @memberOf fabric.Observable
* @alias off
* @param {String|Object} eventName Event name (eg. 'after:render') or object with key/value pairs (eg. {'after:render': handler, 'selection:cleared': handler})
* @param {Function} handler Function to be deleted from EventListeners
* @return {Self} thisArg
* @chainable
*/
function stopObserving(eventName, handler) {
if (!this.__eventListeners) return;
// one object with key/value pairs was passed
if (arguments.length === 1 && typeof arguments[0] === 'object') {
for (var prop in eventName) {
_removeEventListener.call(this, prop, eventName[prop]);
}
}
else {
_removeEventListener.call(this, eventName, handler);
}
return this;
}
/**
* Fires event with an optional options object
* @deprecated `fire` deprecated since 1.0.7 (use `trigger` instead)
* @memberOf fabric.Observable
* @alias trigger
* @param {String} eventName Event name to fire
* @param {Object} [options] Options object
* @return {Self} thisArg
* @chainable
*/
function fire(eventName, options) {
if (!this.__eventListeners) return;
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].call(this, options || { });
}
return this;
}
/**
* @namespace fabric.Observable
*/
fabric.Observable = {
observe: observe,
stopObserving: stopObserving,
fire: fire,
on: observe,
off: stopObserving,
trigger: fire
};
})();
/**
* @namespace fabric.Collection
*/
fabric.Collection = {
/**
* Adds objects to collection, then renders canvas (if `renderOnAddRemove` is not `false`)
* Objects should be instances of (or inherit from) fabric.Object
* @param [...] Zero or more fabric instances
* @return {Self} thisArg
*/
add: function () {
this._objects.push.apply(this._objects, arguments);
for (var i = arguments.length; i--; ) {
this._onObjectAdded(arguments[i]);
}
this.renderOnAddRemove && this.renderAll();
return this;
},
/**
* Inserts an object into collection at specified index, then renders canvas (if `renderOnAddRemove` is not `false`)
* An object should be an instance of (or inherit from) fabric.Object
* @param {Object} object Object to insert
* @param {Number} index Index to insert object at
* @param {Boolean} nonSplicing When `true`, no splicing (shifting) of objects occurs
* @return {Self} thisArg
*/
insertAt: function (object, index, nonSplicing) {
var objects = this.getObjects();
if (nonSplicing) {
objects[index] = object;
}
else {
objects.splice(index, 0, object);
}
this._onObjectAdded(object);
this.renderOnAddRemove && this.renderAll();
return this;
},
/**
* Removes an object from a collection, then renders canvas (if `renderOnAddRemove` is not `false`)
* @param {Object} object Object to remove
* @return {Self} thisArg
*/
remove: function(object) {
var objects = this.getObjects(),
index = objects.indexOf(object);
// only call onObjectRemoved if an object was actually removed
if (index !== -1) {
objects.splice(index, 1);
this._onObjectRemoved(object);
}
this.renderOnAddRemove && this.renderAll();
return object;
},
/**
* Executes given function for each object in this group
* @param {Function} callback
* Callback invoked with current object as first argument,
* index - as second and an array of all objects - as third.
* 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 {Self} thisArg
*/
forEachObject: function(callback, context) {
var objects = this.getObjects(),
i = objects.length;
while (i--) {
callback.call(context, objects[i], i, objects);
}
return this;
},
/**
* Returns object at specified index
* @param {Number} index
* @return {Self} thisArg
*/
item: function (index) {
return this.getObjects()[index];
},
/**
* Returns true if collection contains no objects
* @return {Boolean} true if collection is empty
*/
isEmpty: function () {
return this.getObjects().length === 0;
},
/**
* Returns a size of a collection (i.e: length of an array containing its objects)
* @return {Number} Collection size
*/
size: function() {
return this.getObjects().length;
},
/**
* Returns true if collection contains an object
* @param {Object} object Object to check against
* @return {Boolean} `true` if collection contains an object
*/
contains: function(object) {
return this.getObjects().indexOf(object) > -1;
},
/**
* Returns number representation of a collection complexity
* @return {Number} complexity
*/
complexity: function () {
return this.getObjects().reduce(function (memo, current) {
memo += current.complexity ? current.complexity() : 0;
return memo;
}, 0);
},
/**
* Makes all of the collection objects grayscale (i.e. calling `toGrayscale` on them)
* @return {Self} thisArg
*/
toGrayscale: function() {
return this.forEachObject(function(obj) {
obj.toGrayscale();
});
}
};
(function() {
var sqrt = Math.sqrt,
atan2 = Math.atan2;
/**
* @namespace fabric.util
*/
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
* @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
* @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
* @memberOf fabric.util
* @param {Number} degrees value in degrees
* @return {Number} value in radians
*/
function degreesToRadians(degrees) {
return degrees * PiBy180;
}
/**
* Transforms radians to degrees.
* @static
* @memberOf fabric.util
* @param {Number} radians value in radians
* @return {Number} value in degrees
*/
function radiansToDegrees(radians) {
return radians / PiBy180;
}
/**
* Rotates `point` around `origin` with `radians`
* @static
* @memberOf fabric.util
* @param {fabric.Point} The point to rotate
* @param {fabric.Point} The origin of the rotation
* @param {Number} The radians of the angle for the rotation
* @return {fabric.Point} The new rotated point
*/
function rotatePoint(point, origin, radians) {
var sin = Math.sin(radians),
cos = Math.cos(radians);
point.subtractEquals(origin);
var rx = point.x * cos - point.y * sin;
var ry = point.x * sin + point.y * cos;
return new fabric.Point(rx, ry).addEquals(origin);
}
/**
* A wrapper around Number#toFixed, which contrary to native method returns number, not string.
* @static
* @memberOf fabric.util
* @param {Number | String} number number to operate on
* @param {Number} fractionDigits number of fraction digits to "leave"
* @return {Number}
*/
function toFixed(number, fractionDigits) {
return parseFloat(Number(number).toFixed(fractionDigits));
}
/**
* Function which always returns `false`.
* @static
* @memberOf fabric.util
* @return {Boolean}
*/
function falseFunction() {
return false;
}
/**
* Returns klass "Class" object of given namespace
* @memberOf fabric.util
* @param {String} type Type of object (eg. 'circle')
* @param {String} namespace Namespace to get klass "Class" object from
* @return {Object} klass "Class"
*/
function getKlass(type, namespace) {
return resolveNamespace(namespace)[fabric.util.string.camelize(fabric.util.string.capitalize(type))];
}
/**
* Returns object of given namespace
* @memberOf fabric.util
* @param {String} namespace Namespace string e.g. 'fabric.Image.filter' or 'fabric'
* @return {Object} Object for given namespace (default fabric)
*/
function resolveNamespace(namespace) {
if (!namespace) return fabric;
var parts = namespace.split('.'),
len = parts.length,
obj = fabric.window;
for (var i = 0; i < len; ++i) {
obj = obj[parts[i]];
}
return obj;
}
/**
* Loads image element from given url and passes it to a callback
* @memberOf fabric.util
* @param {String} url URL representing an image
* @param {Function} callback Callback; invoked with loaded image
* @param {Any} context optional Context to invoke callback in
*/
function loadImage(url, callback, context) {
if (url) {
var img = fabric.util.createImage();
/** @ignore */
img.onload = function () {
callback && callback.call(context, img);
img = img.onload = null;
};
img.src = url;
}
else {
callback && callback.call(context, url);
}
}
/**
* Creates corresponding fabric instances from their object representations
* @static
* @memberOf fabric.util
* @param {Array} objects Objects to enliven
* @param {Function} callback Callback to invoke when all objects are created
* @param {Function} [reviver] Method for further parsing of object elements, called after each fabric object created.
*/
function enlivenObjects(objects, callback, namespace, reviver) {
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 = fabric.util.getKlass(o.type, namespace);
if (klass.async) {
klass.fromObject(o, function (obj, error) {
if (!error) {
enlivenedObjects[index] = obj;
reviver && reviver(o, enlivenedObjects[index]);
}
onLoaded();
});
}
else {
enlivenedObjects[index] = klass.fromObject(o);
reviver && reviver(o, enlivenedObjects[index]);
onLoaded();
}
});
}
/**
* Groups SVG elements (usually those retrieved from SVG document)
* @static
* @memberOf fabric.util
* @param {Array} elements SVG elements to group
* @param {Object} [options] Options object
* @return {fabric.Object|fabric.PathGroup}
*/
function groupSVGElements(elements, options, path) {
var object;
if (elements.length > 1) {
object = new fabric.PathGroup(elements, options);
}
else {
object = elements[0];
}
if (typeof path !== 'undefined') {
object.setSourcePath(path);
}
return object;
}
/**
* Populates an object with properties of another object
* @static
* @memberOf fabric.util
* @param {Object} source Source object
* @param {Object} destination Destination object
* @return {Array} properties Propertie names to include
*/
function populateWithProperties(source, destination, properties) {
if (properties && Object.prototype.toString.call(properties) === '[object Array]') {
for (var i = 0, len = properties.length; i < len; i++) {
if (properties[i] in source) {
destination[properties[i]] = source[properties[i]];
}
}
}
}
/**
* Draws a dashed line between two points
*
* This method is used to draw dashed line around selection area.
* See <a href="http://stackoverflow.com/questions/4576724/dotted-stroke-in-canvas">dotted stroke in canvas</a>
*
* @param ctx {Canvas} context
* @param x {Number} start x coordinate
* @param y {Number} start y coordinate
* @param x2 {Number} end x coordinate
* @param y2 {Number} end y coordinate
* @param da {Array} dash array pattern
*/
function drawDashedLine(ctx, x, y, x2, y2, da) {
var dx = x2 - x,
dy = y2 - y,
len = sqrt(dx*dx + dy*dy),
rot = atan2(dy, dx),
dc = da.length,
di = 0,
draw = true;
ctx.save();
ctx.translate(x, y);
ctx.moveTo(0, 0);
ctx.rotate(rot);
x = 0;
while (len > x) {
x += da[di++ % dc];
if (x > len) {
x = len;
}
ctx[draw ? 'lineTo' : 'moveTo'](x, 0);
draw = !draw;
}
ctx.restore();
}
/**
* Creates canvas element and initializes it via excanvas if necessary
* @static
* @memberOf fabric.util
* @param {CanvasElement} [canvasEl] optional canvas element to initialize; when not given, element is created implicitly
* @return {CanvasElement} initialized canvas element
*/
function createCanvasElement(canvasEl) {
canvasEl || (canvasEl = fabric.document.createElement('canvas'));
if (!canvasEl.getContext && typeof G_vmlCanvasManager !== 'undefined') {
G_vmlCanvasManager.initElement(canvasEl);
}
return canvasEl;
}
/**
* Creates image element (works on client and node)
* @static
* @memberOf fabric.util
* @return {HTMLImageElement} HTML image element
*/
function createImage() {
return fabric.isLikelyNode
? new (require('canvas').Image)()
: fabric.document.createElement('img');
}
/**
* Creates accessors (getXXX, setXXX) for a "class", based on "stateProperties" array
* @static
* @memberOf fabric.util
* @param {Object} klass "Class" to create accessors for
*/
function createAccessors(klass) {
var proto = klass.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);
}
}
}
/**
* @static
* @memberOf fabric.util
* @param {fabric.Object} receiver Object implementing `clipTo` method
* @param {CanvasRenderingContext2D} ctx Context to clip
*/
function clipContext(receiver, ctx) {
ctx.save();
ctx.beginPath();
receiver.clipTo(ctx);
ctx.clip();
}
/**
* Multiply matrix A by matrix B to nest transformations
* @static
* @memberOf fabric.util
* @param {Array} matrixA First transformMatrix
* @param {Array} matrixB Second transformMatrix
* @return {Array} The product of the two transform matrices
*/
function multiplyTransformMatrices(matrixA, matrixB) {
// Matrix multiply matrixA * matrixB
var a = [
[matrixA[0], matrixA[2], matrixA[4]],
[matrixA[1], matrixA[3], matrixA[5]],
[0 , 0 , 1 ]
];
var b = [
[matrixB[0], matrixB[2], matrixB[4]],
[matrixB[1], matrixB[3], matrixB[5]],
[0 , 0 , 1 ]
];
var result = [];
for (var r=0; r<3; r++) {
result[r] = [];
for (var c=0; c<3; c++) {
var sum = 0;
for (var k=0; k<3; k++) {
sum += a[r][k]*b[k][c];
}
result[r][c] = sum;
}
}
return [
result[0][0],
result[1][0],
result[0][1],
result[1][1],
result[0][2],
result[1][2]
];
}
function getFunctionBody(fn) {
return (String(fn).match(/function[^{]*\{([\s\S]*)\}/) || {})[1];
}
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<segs.length; i++) {
var bez = segmentToBezier.apply(this, segs[i]);
ctx.bezierCurveTo.apply(ctx, bez);
}
}
var arcToSegmentsCache = { },
segmentToBezierCache = { },
_join = Array.prototype.join,
argsString;
// Generous contribution by Raph Levien, from libsvg-0.1.0.tar.gz
function arcToSegments(x, y, rx, ry, large, sweep, rotateX, ox, oy) {
argsString = _join.call(arguments);
if (arcToSegmentsCache[argsString]) {
return arcToSegmentsCache[argsString];
}
var th = rotateX * (Math.PI/180);
var sin_th = Math.sin(th);
var cos_th = Math.cos(th);
rx = Math.abs(rx);
ry = Math.abs(ry);
var px = cos_th * (ox - x) * 0.5 + sin_th * (oy - y) * 0.5;
var py = cos_th * (oy - y) * 0.5 - sin_th * (ox - x) * 0.5;
var pl = (px*px) / (rx*rx) + (py*py) / (ry*ry);
if (pl > 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<segments; i++) {
var th2 = th0 + i * th_arc / segments;
var th3 = th0 + (i+1) * th_arc / segments;
result[i] = [xc, yc, th2, th3, rx, ry, sin_th, cos_th];
}
arcToSegmentsCache[argsString] = result;
return result;
}
function segmentToBezier(cx, cy, th0, th1, rx, ry, sin_th, cos_th) {
argsString = _join.call(arguments);
if (segmentToBezierCache[argsString]) {
return segmentToBezierCache[argsString];
}
var a00 = cos_th * rx;
var a01 = -sin_th * ry;
var a10 = sin_th * rx;
var a11 = cos_th * ry;
var th_half = 0.5 * (th1 - th0);
var t = (8/3) * Math.sin(th_half * 0.5) * Math.sin(th_half * 0.5) / Math.sin(th_half);
var x1 = cx + Math.cos(th0) - t * Math.sin(th0);
var y1 = cy + Math.sin(th0) + t * Math.cos(th0);
var x3 = cx + Math.cos(th1);
var y3 = cy + Math.sin(th1);
var x2 = x3 + t * Math.sin(th1);
var y2 = y3 - t * Math.cos(th1);
segmentToBezierCache[argsString] = [
a00 * x1 + a01 * y1, a10 * x1 + a11 * y1,
a00 * x2 + a01 * y2, a10 * x2 + a11 * y2,
a00 * x3 + a01 * y3, a10 * x3 + a11 * y3
];
return segmentToBezierCache[argsString];
}
fabric.util.removeFromArray = removeFromArray;
fabric.util.degreesToRadians = degreesToRadians;
fabric.util.radiansToDegrees = radiansToDegrees;
fabric.util.rotatePoint = rotatePoint;
fabric.util.toFixed = toFixed;
fabric.util.getRandomInt = getRandomInt;
fabric.util.falseFunction = falseFunction;
fabric.util.getKlass = getKlass;
fabric.util.resolveNamespace = resolveNamespace;
fabric.util.loadImage = loadImage;
fabric.util.enlivenObjects = enlivenObjects;
fabric.util.groupSVGElements = groupSVGElements;
fabric.util.populateWithProperties = populateWithProperties;
fabric.util.drawDashedLine = drawDashedLine;
fabric.util.createCanvasElement = createCanvasElement;
fabric.util.createImage = createImage;
fabric.util.createAccessors = createAccessors;
fabric.util.clipContext = clipContext;
fabric.util.multiplyTransformMatrices = multiplyTransformMatrices;
fabric.util.getFunctionBody = getFunctionBody;
fabric.util.drawArc = drawArc;
})();
(function() {
var slice = Array.prototype.slice;
/* _ES5_COMPAT_START_ */
if (!Array.prototype.indexOf) {
/**
* Finds index of an element in an array
* @param {Any} searchElement
* @param {Number} [fromIndex]
* @return {Number}
*/
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 !== Number.POSITIVE_INFINITY && n !== Number.NEGATIVE_INFINITY) {
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) {
/**
* Iterates an array, invoking callback for each element
* @param {Function} fn Callback to invoke for each element
* @param {Object} [context] Context to invoke callback in
* @return {Array}
*/
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) {
/**
* Returns a result of iterating over an array, invoking callback for each element
* @param {Function} fn Callback to invoke for each element
* @param {Object} [context] Context to invoke callback in
* @return {Array}
*/
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) {
/**
* Returns true if a callback returns truthy value for all elements in an array
* @param {Function} fn Callback to invoke for each element
* @param {Object} [context] Context to invoke callback in
* @return {Boolean}
*/
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) {
/**
* Returns true if a callback returns truthy value for at least one element in an array
* @param {Function} fn Callback to invoke for each element
* @param {Object} [context] Context to invoke callback in
* @return {Boolean}
*/
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) {
/**
* Returns the result of iterating over elements in an array
* @param {Function} fn Callback to invoke for each element
* @param {Object} [context] Context to invoke callback in
* @return {Array}
*/
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) {
/**
* Returns "folded" (reduced) result of iterating over elements in an array
* @param {Function} fn Callback to invoke for each element
* @param {Object} [context] Context to invoke callback in
* @return {Any}
*/
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;
};
}
/* _ES5_COMPAT_END_ */
/**
* Invokes method on all items in a given array
* @memberOf fabric.util.array
* @param {Array} array Array to iterate over
* @param {String} method Name of a method to invoke
* @return {Array}
*/
function invoke(array, method) {
var args = slice.call(arguments, 2), result = [ ];
for (var i = 0, len = array.length; i < len; i++) {
result[i] = args.length ? array[i][method].apply(array[i], args) : array[i][method].call(array[i]);
}
return result;
}
/**
* Finds maximum value in array (not necessarily "first" one)
* @memberOf fabric.util.array
* @param {Array} array Array to iterate over
* @param {String} byProperty
* @return {Any}
*/
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)
* @memberOf fabric.util.array
* @param {Array} array Array to iterate over
* @param {String} byProperty
* @return {Any}
*/
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
*/
fabric.util.array = {
invoke: invoke,
min: min,
max: max
};
})();
(function(){
/**
* Copies all enumerable properties of one object to another
* @memberOf fabric.util.object
* @param {Object} destination Where to copy to
* @param {Object} source Where to copy from
* @return {Object}
*/
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
* @memberOf fabric.util.object
* @param {Object} object Object to clone
* @return {Object}
*/
function clone(object) {
return extend({ }, object);
}
/** @namespace fabric.util.object */
fabric.util.object = {
extend: extend,
clone: clone
};
})();
(function() {
/* _ES5_COMPAT_START_ */
if (!String.prototype.trim) {
/**
* Trims a string (removing whitespace from the beginning and the end)
* @function external:String#trim
* @see <a href="https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/String/Trim">String#trim on MDN</a>
*/
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]+$/, '');
};
}
/* _ES5_COMPAT_END_ */
/**
* Camelizes a string
* @memberOf fabric.util.string
* @param {String} string String to camelize
* @return {String} Camelized version of a string
*/
function camelize(string) {
return string.replace(/-+(.)?/g, function(match, character) {
return character ? character.toUpperCase() : '';
});
}
/**
* Capitalizes a string
* @memberOf fabric.util.string
* @param {String} string String to capitalize
* @return {String} Capitalized version of a string
*/
function capitalize(string) {
return string.charAt(0).toUpperCase() + string.slice(1).toLowerCase();
}
/**
* Escapes XML in a string
* @memberOf fabric.util.string
* @param {String} string String to escape
* @return {String} Escaped version of a string
*/
function escapeXml(string) {
return string.replace(/&/g, '&amp;')
.replace(/"/g, '&quot;')
.replace(/'/g, '&apos;')
.replace(/</g, '&lt;')
.replace(/>/g, '&gt;');
}
/**
* String utilities
* @namespace fabric.util.string
*/
fabric.util.string = {
camelize: camelize,
capitalize: capitalize,
escapeXml: escapeXml
};
}());
/* _ES5_COMPAT_START_ */
(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 <a href="https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Function/bind">Function#bind on MDN</a>
* @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 {
/** @ignore */
bound = function() {
return apply.call(fn, this instanceof Dummy ? this : thisArg, arguments);
};
}
Dummy.prototype = this.prototype;
bound.prototype = new Dummy();
return bound;
};
}
})();
/* _ES5_COMPAT_END_ */
(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' &&
(source[property] + '').indexOf('callSuper') > -1) {
klass.prototype[property] = (function(property) {
return function() {
var superclass = this.constructor.superclass;
this.constructor.superclass = parent;
var returnValue = source[property].apply(this, arguments);
this.constructor.superclass = superclass;
if (property !== 'initialize') {
return returnValue;
}
};
})(property);
}
else {
klass.prototype[property] = source[property];
}
if (IS_DONTENUM_BUGGY) {
if (source.toString !== Object.prototype.toString) {
klass.prototype.toString = source.toString;
}
if (source.valueOf !== Object.prototype.valueOf) {
klass.prototype.valueOf = source.valueOf;
}
}
}
};
function Subclass() { }
function callSuper(methodName) {
var fn = this.constructor.superclass.prototype[methodName];
return (arguments.length > 1)
? fn.apply(this, slice.call(arguments, 1))
: fn.call(this);
}
/**
* Helper for creation of "classes".
* @memberOf fabric.util
* @param parent optional "Class" to inherit from
* @param properties Properties shared by all instances of this class
* (be careful modifying objects defined here as this would affect all instances)
*/
function createClass() {
var parent = null,
properties = slice.call(arguments, 0);
if (typeof properties[0] === 'function') {
parent = properties.shift();
}
function klass() {
this.initialize.apply(this, arguments);
}
klass.superclass = parent;
klass.subclasses = [ ];
if (parent) {
Subclass.prototype = parent.prototype;
klass.prototype = new Subclass();
parent.subclasses.push(klass);
}
for (var i = 0, length = properties.length; i < length; i++) {
addMethods(klass, properties[i], parent);
}
if (!klass.prototype.initialize) {
klass.prototype.initialize = emptyFunction;
}
klass.prototype.constructor = klass;
klass.prototype.callSuper = callSuper;
return klass;
}
fabric.util.createClass = createClass;
})();
(function () {
/* 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 () {
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
* @function
* @memberOf fabric.util
* @param {HTMLElement} element
* @param {String} eventName
* @param {Function} handler
*/
fabric.util.addListener = addListener;
/**
* Removes an event listener from an element
* @function
* @memberOf fabric.util
* @param {HTMLElement} element
* @param {String} eventName
* @param {Function} handler
*/
fabric.util.removeListener = removeListener;
/**
* Cross-browser wrapper for getting event's coordinates
* @memberOf fabric.util
* @param {Event} event
* @param {HTMLCanvasElement} upperCanvasEl &lt;canvas> element on which object selection is drawn
*/
function getPointer(event, upperCanvasEl) {
event || (event = fabric.window.event);
var element = event.target || (typeof event.srcElement !== 'unknown' ? event.srcElement : null),
body = fabric.document.body || {scrollLeft: 0, scrollTop: 0},
docElement = fabric.document.documentElement,
orgElement = element,
scrollLeft = 0,
scrollTop = 0,
firstFixedAncestor;
while (element && element.parentNode && !firstFixedAncestor) {
element = element.parentNode;
if (element !== fabric.document &&
fabric.util.getElementStyle(element, 'position') === 'fixed') {
firstFixedAncestor = element;
}
if (element !== fabric.document &&
orgElement !== upperCanvasEl &&
fabric.util.getElementStyle(element, 'position') === 'absolute') {
scrollLeft = 0;
scrollTop = 0;
}
else if (element === fabric.document) {
scrollLeft = body.scrollLeft || docElement.scrollLeft || 0;
scrollTop = body.scrollTop || docElement.scrollTop || 0;
}
else {
scrollLeft += element.scrollLeft || 0;
scrollTop += element.scrollTop || 0;
}
}
return {
x: pointerX(event) + scrollLeft,
y: pointerY(event) + scrollTop
};
}
var pointerX = function(event) {
// 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 (typeof event.clientX !== 'unknown' ? event.clientX : 0);
};
var pointerY = function(event) {
return (typeof event.clientY !== 'unknown' ? event.clientY : 0);
};
if (fabric.isTouchSupported) {
pointerX = function(event) {
if (event.type !== 'touchend') {
return (event.touches && event.touches[0] ?
(event.touches[0].pageX - (event.touches[0].pageX - event.touches[0].clientX)) || event.clientX : event.clientX);
}
return (event.changedTouches && event.changedTouches[0]
? (event.changedTouches[0].pageX - (event.changedTouches[0].pageX - event.changedTouches[0].clientX)) || event.clientX : event.clientX);
};
pointerY = function(event) {
if (event.type !== 'touchend') {
return (event.touches && event.touches[0]
? (event.touches[0].pageY - (event.touches[0].pageY - event.touches[0].clientY)) || event.clientY : event.clientY);
}
return (event.changedTouches && event.changedTouches[0]
? (event.changedTouches[0].pageY - (event.changedTouches[0].pageY - event.changedTouches[0].clientY)) || event.clientY : event.clientY);
};
}
fabric.util.getPointer = getPointer;
fabric.util.object.extend(fabric.util, fabric.Observable);
})();
(function () {
/**
* Cross-browser wrapper for setting element's style
* @memberOf fabric.util
* @param {HTMLElement} element
* @param {Object} styles
* @return {HTMLElement} Element that was passed as a first argument
*/
function setStyle(element, styles) {
var elementStyle = element.style;
if (!elementStyle) {
return element;
}
if (typeof styles === 'string') {
element.style.cssText += ';' + styles;
return styles.indexOf('opacity') > -1
? setOpacity(element, styles.match(/opacity:\s*(\d?\.?\d*)/)[1])
: element;
}
for (var property in styles) {
if (property === 'opacity') {
setOpacity(element, styles[property]);
}
else {
var normalizedProperty = (property === 'float' || property === 'cssFloat')
? (typeof elementStyle.styleFloat === 'undefined' ? 'cssFloat' : 'styleFloat')
: property;
elementStyle[normalizedProperty] = styles[property];
}
}
return element;
}
var parseEl = fabric.document.createElement('div'),
supportsOpacity = typeof parseEl.style.opacity === 'string',
supportsFilters = typeof parseEl.style.filter === 'string',
reOpacity = /alpha\s*\(\s*opacity\s*=\s*([^\)]+)\)/,
/** @ignore */
setOpacity = function (element) { return element; };
if (supportsOpacity) {
/** @ignore */
setOpacity = function(element, value) {
element.style.opacity = value;
return element;
};
}
else if (supportsFilters) {
/** @ignore */
setOpacity = function(element, value) {
var es = element.style;
if (element.currentStyle && !element.currentStyle.hasLayout) {
es.zoom = 1;
}
if (reOpacity.test(es.filter)) {
value = value >= 0.9999 ? '' : ('alpha(opacity=' + (value * 100) + ')');
es.filter = es.filter.replace(reOpacity, value);
}
else {
es.filter += ' alpha(opacity=' + (value * 100) + ')';
}
return element;
};
}
fabric.util.setStyle = setStyle;
})();
(function() {
var _slice = Array.prototype.slice;
/**
* Takes id and returns an element with that id (if one exists in a document)
* @memberOf fabric.util
* @param {String|HTMLElement} id
* @return {HTMLElement|null}
*/
function getById(id) {
return typeof id === 'string' ? fabric.document.getElementById(id) : id;
}
/**
* Converts an array-like object (e.g. arguments or NodeList) to an array
* @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
* @memberOf fabric.util
* @param {String} tagName Type of an element to create
* @param {Object} [attributes] Attributes to set on an element
* @return {HTMLElement} Newly created element
*/
function makeElement(tagName, attributes) {
var el = fabric.document.createElement(tagName);
for (var prop in attributes) {
if (prop === 'class') {
el.className = attributes[prop];
}
else if (prop === 'for') {
el.htmlFor = attributes[prop];
}
else {
el.setAttribute(prop, attributes[prop]);
}
}
return el;
}
/**
* Adds class to an element
* @memberOf fabric.util
* @param {HTMLElement} element Element to add class to
* @param {String} className Class to add to an element
*/
function addClass(element, className) {
if ((' ' + element.className + ' ').indexOf(' ' + className + ' ') === -1) {
element.className += (element.className ? ' ' : '') + className;
}
}
/**
* Wraps element with another element
* @memberOf fabric.util
* @param {HTMLElement} element Element to wrap
* @param {HTMLElement|String} wrapper Element to wrap with
* @param {Object} [attributes] Attributes to set on a wrapper
* @return {HTMLElement} wrapper
*/
function wrapElement(element, wrapper, attributes) {
if (typeof wrapper === 'string') {
wrapper = makeElement(wrapper, attributes);
}
if (element.parentNode) {
element.parentNode.replaceChild(wrapper, element);
}
wrapper.appendChild(element);
return wrapper;
}
/**
* Returns offset for a given element
* @function
* @memberOf fabric.util
* @param {HTMLElement} element Element to get offset for
* @return {Object} Object with "left" and "top" properties
*/
function getElementOffset(element) {
var docElem, win,
box = {left: 0, top: 0},
doc = element && element.ownerDocument,
offset = {left: 0, top: 0},
offsetAttributes = {
'borderLeftWidth': 'left',
'borderTopWidth': 'top',
'paddingLeft': 'left',
'paddingTop': 'top'
};
if (!doc){
return {left: 0, top: 0};
}
for (var attr in offsetAttributes) {
offset[offsetAttributes[attr]] += parseInt(getElementStyle(element, attr), 10) || 0;
}
docElem = doc.documentElement;
if ( typeof element.getBoundingClientRect !== "undefined" ) {
box = element.getBoundingClientRect();
}
if(doc != null && doc === doc.window){
win = doc;
} else {
win = doc.nodeType === 9 && (doc.defaultView || doc.parentWindow);
}
return {
left: box.left + (win.pageXOffset || docElem.scrollLeft) - (docElem.clientLeft || 0) + offset.left,
top: box.top + (win.pageYOffset || docElem.scrollTop) - (docElem.clientTop || 0) + offset.top
};
}
/**
* Returns style attribute value of a given element
* @memberOf fabric.util
* @param {HTMLElement} element Element to get style attribute for
* @param {String} attr Style attribute to get for element
* @return {String} Style attribute value of the given element.
*/
function getElementStyle(element, attr) {
if (!element.style) {
element.style = { };
}
if (fabric.document.defaultView && fabric.document.defaultView.getComputedStyle) {
return fabric.document.defaultView.getComputedStyle(element, null)[attr];
}
else {
var value = element.style[attr];
if (!value && element.currentStyle) value = element.currentStyle[attr];
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
* @memberOf fabric.util
* @param {HTMLElement} element Element to make unselectable
* @return {HTMLElement} Element that was passed in
*/
function makeElementUnselectable(element) {
if (typeof element.onselectstart !== 'undefined') {
element.onselectstart = fabric.util.falseFunction;
}
if (selectProp) {
element.style[selectProp] = 'none';
}
else if (typeof element.unselectable === 'string') {
element.unselectable = 'on';
}
return element;
}
/**
* Makes element selectable
* @memberOf fabric.util
* @param {HTMLElement} element Element to make selectable
* @return {HTMLElement} Element that was passed in
*/
function makeElementSelectable(element) {
if (typeof element.onselectstart !== 'undefined') {
element.onselectstart = null;
}
if (selectProp) {
element.style[selectProp] = '';
}
else if (typeof element.unselectable === 'string') {
element.unselectable = '';
}
return element;
}
fabric.util.makeElementUnselectable = makeElementUnselectable;
fabric.util.makeElementSelectable = makeElementSelectable;
})();
(function() {
/**
* Inserts a script element with a given url into a document; invokes callback, when that script is finished loading
* @memberOf fabric.util
* @param {String} url URL of a script to load
* @param {Function} callback Callback to execute when script is finished loading
*/
function getScript(url, callback) {
var headEl = fabric.document.getElementsByTagName("head")[0],
scriptEl = fabric.document.createElement('script'),
loading = true;
/** @ignore */
scriptEl.onload = /** @ignore */ scriptEl.onreadystatechange = function(e) {
if (loading) {
if (typeof this.readyState === 'string' &&
this.readyState !== 'loaded' &&
this.readyState !== 'complete') return;
loading = false;
callback(e || fabric.window.event);
scriptEl = scriptEl.onload = scriptEl.onreadystatechange = null;
}
};
scriptEl.src = url;
headEl.appendChild(scriptEl);
// causes issue in Opera
// headEl.removeChild(scriptEl);
}
fabric.util.getScript = getScript;
})();
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.getElementStyle = getElementStyle;
})();
(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
* @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() {
/**
* Changes value from one to another within certain period of time, invoking callbacks as value is being changed.
* @memberOf fabric.util
* @param {Object} [options] Animation options
* @param {Function} [options.onChange] Callback; invoked on every value change
* @param {Function} [options.onComplete] Callback; invoked when value change is completed
* @param {Number} [options.startValue=0] Starting value
* @param {Number} [options.endValue=100] Ending value
* @param {Number} [options.byValue=100] Value to modify the property by
* @param {Function} [options.easing] Easing function
* @param {Number} [options.duration=500] Duration of change
*/
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);
if (abort()) {
options.onComplete && options.onComplete();
return;
}
onChange(easing(currentTime, startValue, byValue, duration));
if (time > finish) {
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/
* @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);
};
fabric.util.animate = animate;
fabric.util.requestAnimFrame = requestAnimFrame;
})();
(function() {
/**
* Quadratic easing in
* @memberOf fabric.util.ease
*/
function easeInQuad(t, b, c, d) {
return c*(t/=d)*t + b;
}
/**
* Quadratic easing out
* @memberOf fabric.util.ease
*/
function easeOutQuad(t, b, c, d) {
return -c *(t/=d)*(t-2) + b;
}
/**
* Quadratic easing in and out
* @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;
}
/**
* Cubic easing in
* @memberOf fabric.util.ease
*/
function easeInCubic(t, b, c, d) {
return c*(t/=d)*t*t + b;
}
/**
* Cubic easing out
* @memberOf fabric.util.ease
*/
function easeOutCubic(t, b, c, d) {
return c*((t=t/d-1)*t*t + 1) + b;
}
/**
* Cubic easing in and out
* @memberOf fabric.util.ease
*/
function easeInOutCubic(t, b, c, d) {
t /= d/2;
if (t < 1) return c/2*t*t*t + b;
return c/2*((t-=2)*t*t + 2) + b;
}
/**
* Quartic easing in
* @memberOf fabric.util.ease
*/
function easeInQuart(t, b, c, d) {
return c*(t/=d)*t*t*t + b;
}
/**
* Quartic easing out
* @memberOf fabric.util.ease
*/
function easeOutQuart(t, b, c, d) {
return -c * ((t=t/d-1)*t*t*t - 1) + b;
}
/**
* Quartic easing in and out
* @memberOf fabric.util.ease
*/
function easeInOutQuart(t, b, c, d) {
t /= d/2;
if (t < 1) return c/2*t*t*t*t + b;
return -c/2 * ((t-=2)*t*t*t - 2) + b;
}
/**
* Quintic easing in
* @memberOf fabric.util.ease
*/
function easeInQuint(t, b, c, d) {
return c*(t/=d)*t*t*t*t + b;
}
/**
* Quintic easing out
* @memberOf fabric.util.ease
*/
function easeOutQuint(t, b, c, d) {
return c*((t=t/d-1)*t*t*t*t + 1) + b;
}
/**
* Quintic easing in and out
* @memberOf fabric.util.ease
*/
function easeInOutQuint(t, b, c, d) {
t /= d/2;
if (t < 1) return c/2*t*t*t*t*t + b;
return c/2*((t-=2)*t*t*t*t + 2) + b;
}
/**
* Sinusoidal easing in
* @memberOf fabric.util.ease
*/
function easeInSine(t, b, c, d) {
return -c * Math.cos(t/d * (Math.PI/2)) + c + b;
}
/**
* Sinusoidal easing out
* @memberOf fabric.util.ease
*/
function easeOutSine(t, b, c, d) {
return c * Math.sin(t/d * (Math.PI/2)) + b;
}
/**
* Sinusoidal easing in and out
* @memberOf fabric.util.ease
*/
function easeInOutSine(t, b, c, d) {
return -c/2 * (Math.cos(Math.PI*t/d) - 1) + b;
}
/**
* Exponential easing in
* @memberOf fabric.util.ease
*/
function easeInExpo(t, b, c, d) {
return (t===0) ? b : c * Math.pow(2, 10 * (t/d - 1)) + b;
}
/**
* Exponential easing out
* @memberOf fabric.util.ease
*/
function easeOutExpo(t, b, c, d) {
return (t===d) ? b+c : c * (-Math.pow(2, -10 * t/d) + 1) + b;
}
/**
* Exponential easing in and out
* @memberOf fabric.util.ease
*/
function easeInOutExpo(t, b, c, d) {
if (t===0) return b;
if (t===d) return b+c;
t /= d/2;
if (t < 1) return c/2 * Math.pow(2, 10 * (t - 1)) + b;
return c/2 * (-Math.pow(2, -10 * --t) + 2) + b;
}
/**
* Circular easing in
* @memberOf fabric.util.ease
*/
function easeInCirc(t, b, c, d) {
return -c * (Math.sqrt(1 - (t/=d)*t) - 1) + b;
}
/**
* Circular easing out
* @memberOf fabric.util.ease
*/
function easeOutCirc(t, b, c, d) {
return c * Math.sqrt(1 - (t=t/d-1)*t) + b;
}
/**
* Circular easing in and out
* @memberOf fabric.util.ease
*/
function easeInOutCirc(t, b, c, d) {
t /= d/2;
if (t < 1) return -c/2 * (Math.sqrt(1 - t*t) - 1) + b;
return c/2 * (Math.sqrt(1 - (t-=2)*t) + 1) + b;
}
/**
* Elastic easing in
* @memberOf fabric.util.ease
*/
function easeInElastic(t, b, c, d) {
var s=1.70158;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;
}
/**
* Elastic easing out
* @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;
}
/**
* Elastic easing in and out
* @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;
}
/**
* Backwards easing in
* @memberOf fabric.util.ease
*/
function easeInBack(t, b, c, d, s) {
if (s === undefined) s = 1.70158;
return c*(t/=d)*t*((s+1)*t - s) + b;
}
/**
* Backwards easing out
* @memberOf fabric.util.ease
*/
function easeOutBack(t, b, c, d, s) {
if (s === undefined) s = 1.70158;
return c*((t=t/d-1)*t*((s+1)*t + s) + 1) + b;
}
/**
* Backwards easing in and out
* @memberOf fabric.util.ease
*/
function easeInOutBack(t, b, c, d, s) {
if (s === undefined) s = 1.70158;
t /= d/2;
if (t < 1) return c/2*(t*t*(((s*=(1.525))+1)*t - s)) + b;
return c/2*((t-=2)*t*(((s*=(1.525))+1)*t + s) + 2) + b;
}
/**
* Bouncing easing in
* @memberOf fabric.util.ease
*/
function easeInBounce(t, b, c, d) {
return c - easeOutBounce (d-t, 0, c, d) + b;
}
/**
* Bouncing easing out
* @memberOf fabric.util.ease
*/
function easeOutBounce(t, b, c, d) {
if ((t/=d) < (1/2.75)) {
return c*(7.5625*t*t) + b;
} else if (t < (2/2.75)) {
return c*(7.5625*(t-=(1.5/2.75))*t + 0.75) + b;
} else if (t < (2.5/2.75)) {
return c*(7.5625*(t-=(2.25/2.75))*t + 0.9375) + b;
} else {
return c*(7.5625*(t-=(2.625/2.75))*t + 0.984375) + b;
}
}
/**
* Bouncing easing in and out
* @memberOf fabric.util.ease
*/
function easeInOutBounce(t, b, c, d) {
if (t < d/2) return easeInBounce (t*2, 0, c, d) * 0.5 + b;
return easeOutBounce (t*2-d, 0, c, d) * 0.5 + c*0.5 + b;
}
/**
* Easing functions
* See <a href="http://gizma.com/easing/">Easing Equations by Robert Penner</a>
* @namespace fabric.util.ease
*/
fabric.util.ease = {
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,
toFixed = fabric.util.toFixed,
multiplyTransformMatrices = fabric.util.multiplyTransformMatrices;
fabric.SHARED_ATTRIBUTES = [
"transform",
"fill", "fill-opacity", "fill-rule",
"opacity",
"stroke", "stroke-dasharray", "stroke-linecap", "stroke-linejoin", "stroke-miterlimit", "stroke-opacity", "stroke-width"
];
var attributesMap = {
'fill-opacity': 'fillOpacity',
'fill-rule': 'fillRule',
'font-family': 'fontFamily',
'font-size': 'fontSize',
'font-style': 'fontStyle',
'font-weight': 'fontWeight',
'cx': 'left',
'x': 'left',
'r': 'radius',
'stroke-dasharray': 'strokeDashArray',
'stroke-linecap': 'strokeLineCap',
'stroke-linejoin': 'strokeLineJoin',
'stroke-miterlimit':'strokeMiterLimit',
'stroke-opacity': 'strokeOpacity',
'stroke-width': 'strokeWidth',
'text-decoration': 'textDecoration',
'cy': 'top',
'y': 'top',
'transform': 'transformMatrix'
};
var colorAttributes = {
'stroke': 'strokeOpacity',
'fill': 'fillOpacity'
};
function normalizeAttr(attr) {
// transform attribute names
if (attr in attributesMap) {
return attributesMap[attr];
}
return attr;
}
function normalizeValue(attr, value, parentAttributes) {
var isArray;
if ((attr === 'fill' || attr === 'stroke') && value === 'none') {
value = '';
}
else if (attr === 'fillRule') {
value = (value === 'evenodd') ? 'destination-over' : value;
}
else if (attr === 'strokeDashArray') {
value = value.replace(/,/g, ' ').split(/\s+/);
}
else if (attr === 'transformMatrix') {
if (parentAttributes && parentAttributes.transformMatrix) {
value = multiplyTransformMatrices(
parentAttributes.transformMatrix, fabric.parseTransformAttribute(value));
}
else {
value = fabric.parseTransformAttribute(value);
}
}
isArray = Object.prototype.toString.call(value) === '[object Array]';
// TODO: need to normalize em, %, pt, etc. to px (!)
var parsed = isArray ? value.map(parseFloat) : parseFloat(value);
return (!isArray && isNaN(parsed) ? value : parsed);
}
/**
* @private
* @param {Object} attributes Array of attributes to parse
*/
function _setStrokeFillOpacity(attributes) {
for (var attr in colorAttributes) {
if (!attributes[attr] || typeof attributes[colorAttributes[attr]] === 'undefined') continue;
if (attributes[attr].indexOf('url(') === 0) continue;
var color = new fabric.Color(attributes[attr]);
attributes[attr] = color.setAlpha(toFixed(color.getAlpha() * attributes[colorAttributes[attr]], 2)).toRgba();
delete attributes[colorAttributes[attr]];
}
return attributes;
}
/**
* Returns an object of attributes' name/value, given element and an array of attribute names;
* Parses parent "g" nodes recursively upwards.
* @static
* @memberOf fabric
* @param {DOMElement} element Element to parse
* @param {Array} attributes Array of attributes to parse
* @return {Object} object containing parsed attributes' names/values
*/
function parseAttributes(element, attributes) {
if (!element) {
return;
}
var value,
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);
if (value) {
attr = normalizeAttr(attr);
value = normalizeValue(attr, value, parentAttributes);
memo[attr] = value;
}
return memo;
}, { });
// add values parsed from style, which take precedence over attributes
// (see: http://www.w3.org/TR/SVG/styling.html#UsingPresentationAttributes)
ownAttributes = extend(ownAttributes,
extend(getGlobalStylesForElement(element), fabric.parseStyleAttribute(element)));
return _setStrokeFillOpacity(extend(parentAttributes, ownAttributes));
}
/**
* Parses "transform" attribute, returning an array of values
* @static
* @function
* @memberOf fabric
* @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, 'g');
return function(attributeValue) {
// start with identity matrix
var matrix = iMatrix.concat();
var matrices = [ ];
// return if no argument was given or
// an argument does not match transform attribute regexp
if (!attributeValue || (attributeValue && !reTransformList.test(attributeValue))) {
return matrix;
}
attributeValue.replace(reTransform, function(match) {
var m = new RegExp(transform).exec(match).filter(function (match) {
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;
}
// snapshot current matrix into matrices array
matrices.push(matrix.concat());
// reset
matrix = iMatrix.concat();
});
var combinedMatrix = matrices[0];
while (matrices.length > 1) {
matrices.shift();
combinedMatrix = fabric.util.multiplyTransformMatrices(combinedMatrix, matrices[0]);
}
return combinedMatrix;
};
})();
/**
* Parses "points" attribute, returning an array of values
* @static
* @memberOf fabric
* @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;
}
function parseFontDeclaration(value, oStyle) {
// TODO: support non-px font size
var match = value.match(/(normal|italic)?\s*(normal|small-caps)?\s*(normal|bold|bolder|lighter|100|200|300|400|500|600|700|800|900)?\s*(\d+)px(?:\/(normal|[\d\.]+))?\s+(.*)/);
if (!match) return;
var fontStyle = match[1];
// Font variant is not used
// var fontVariant = match[2];
var fontWeight = match[3];
var fontSize = match[4];
var lineHeight = match[5];
var fontFamily = match[6];
if (fontStyle) {
oStyle.fontStyle = fontStyle;
}
if (fontWeight) {
oStyle.fontSize = isNaN(parseFloat(fontWeight)) ? fontWeight : parseFloat(fontWeight);
}
if (fontSize) {
oStyle.fontSize = parseFloat(fontSize);
}
if (fontFamily) {
oStyle.fontFamily = fontFamily;
}
if (lineHeight) {
oStyle.lineHeight = lineHeight === 'normal' ? 1 : lineHeight;
}
}
/**
* Parses "style" attribute, retuning an object with values
* @static
* @memberOf fabric
* @param {SVGElement} element Element to parse
* @return {Object} Objects with values parsed from style attribute of an element
*/
function parseStyleAttribute(element) {
var oStyle = { },
style = element.getAttribute('style'),
attr, value;
if (!style) return oStyle;
if (typeof style === 'string') {
style.replace(/;$/, '').split(';').forEach(function (chunk) {
var pair = chunk.split(':');
attr = normalizeAttr(pair[0].trim().toLowerCase());
value = normalizeValue(attr, pair[1].trim());
if (attr === 'font') {
parseFontDeclaration(value, oStyle);
}
else {
oStyle[attr] = value;
}
});
}
else {
for (var prop in style) {
if (typeof style[prop] === 'undefined') continue;
attr = normalizeAttr(prop.toLowerCase());
value = normalizeValue(attr, style[prop]);
if (attr === 'font') {
parseFontDeclaration(value, oStyle);
}
else {
oStyle[attr] = value;
}
}
}
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
* @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, el), options);
}
else {
var obj = klass.fromElement(el, options);
reviver && reviver(el, obj);
instances.splice(index, 0, obj);
checkIfDone();
}
}
catch(err) {
fabric.log(err);
}
}
else {
checkIfDone();
}
}
}
/**
* Returns CSS rules for a given SVG document
* @static
* @function
* @memberOf fabric
* @param {SVGDocument} doc SVG document to parse
* @return {Object} CSS rules of this document
*/
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(/;$/, '').split(/\s*;\s*/);
if (!allRules[rule]) {
allRules[rule] = { };
}
for (var i = 0, len = propertyValuePairs.length; i < len; i++) {
var pair = propertyValuePairs[i].split(/\s*:\s*/),
property = pair[0],
value = pair[1];
allRules[rule][property] = value;
}
});
}
return allRules;
}
/**
* @private
*/
function getGlobalStylesForElement(element) {
var nodeName = element.nodeName,
className = element.getAttribute('class'),
id = element.getAttribute('id'),
styles = { };
for (var rule in fabric.cssRules) {
var ruleMatchesElement = (className && new RegExp('^\\.' + className).test(rule)) ||
(id && new RegExp('^#' + id).test(rule)) ||
(new RegExp('^' + nodeName).test(rule));
if (ruleMatchesElement) {
for (var property in fabric.cssRules[rule]) {
styles[property] = fabric.cssRules[rule][property];
}
}
}
return styles;
}
/**
* Parses an SVG document, converts it to an array of corresponding fabric.* instances and passes them to a callback
* @static
* @function
* @memberOf fabric
* @param {SVGDocument} doc SVG document to parse
* @param {Function} callback Callback to call when parsing is finished; It's being passed an array of elements (parsed from a document).
* @param {Function} [reviver] Method for further parsing of SVG elements, called after each fabric object created.
*/
fabric.parseSVGDocument = (function() {
var reAllowedSVGTagNames = /^(path|circle|polygon|polyline|ellipse|rect|line|image|text)$/;
// 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`)
* @namespace
*/
var svgCache = {
/**
* @param {String} name
* @param {Function} callback
*/
has: function (name, callback) {
callback(false);
},
/**
* @param {String} url
* @param {Function} callback
*/
get: function () {
/* NOOP */
},
/**
* @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. Note that SVG is fetched via XMLHttpRequest, so it needs to conform to SOP (Same Origin Policy)
* @memberof fabric
* @param {String} url
* @param {Function} callback
* @param {Function} [reviver] Method for further parsing of SVG elements, called after each fabric object created.
*/
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(/<!DOCTYPE[\s\S]*?(\[[\s\S]*\])*?>/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);
}
}
/**
* @private
*/
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
* @memberof fabric
* @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(/<!DOCTYPE[\s\S]*?(\[[\s\S]*\])*?>/i,''));
}
fabric.parseSVGDocument(doc.documentElement, function (results, options) {
callback(results, options);
}, reviver);
}
/**
* Creates markup containing SVG font faces
* @param {Array} objects Array of fabric objects
* @return {String}
*/
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 = [
'<style type="text/css">',
'<![CDATA[',
markup,
']]>',
'</style>'
].join('');
}
return markup;
}
/**
* Creates markup containing SVG referenced elements like patterns, gradients etc.
* @param {fabric.Canvas} canvas instance of fabric.Canvas
* @return {String}
*/
function createSVGRefElementsMarkup(canvas) {
var markup = '';
if (canvas.backgroundColor && canvas.backgroundColor.source) {
markup = [
'<pattern x="0" y="0" id="backgroundColorPattern" ',
'width="', canvas.backgroundColor.source.width,
'" height="', canvas.backgroundColor.source.height,
'" patternUnits="userSpaceOnUse">',
'<image x="0" y="0" ',
'width="', canvas.backgroundColor.source.width,
'" height="', canvas.backgroundColor.source.height,
'" xlink:href="', canvas.backgroundColor.source.src,
'"></image></pattern>'
].join('');
}
return markup;
}
/**
* Parses an SVG document, returning all of the gradient declarations found in it
* @static
* @function
* @memberOf fabric
* @param {SVGDocument} doc SVG document to parse
* @return {Object} Gradient definitions; key corresponds to element id, value -- to gradient definition element
*/
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;
}
extend(fabric, {
parseAttributes: parseAttributes,
parseElements: parseElements,
parseStyleAttribute: parseStyleAttribute,
parsePointsAttribute: parsePointsAttribute,
getCSSRules: getCSSRules,
loadSVGFromURL: loadSVGFromURL,
loadSVGFromString: loadSVGFromString,
createSVGFontFacesMarkup: createSVGFontFacesMarkup,
createSVGRefElementsMarkup: createSVGRefElementsMarkup,
getGradientDefs: getGradientDefs
});
})(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.Point) {
fabric.warn('fabric.Point is already defined');
return;
}
fabric.Point = Point;
/**
* Point class
* @class fabric.Point
* @memberOf fabric
* @constructor
* @param {Number} x
* @param {Number} y
* @return {fabric.Point} thisArg
*/
function Point(x, y) {
this.x = x;
this.y = y;
}
Point.prototype = /** @lends fabric.Point.prototype */ {
constructor: Point,
/**
* Adds another point to this one and returns another one
* @param {fabric.Point} that
* @return {fabric.Point} new Point instance with added values
*/
add: function (that) {
return new Point(this.x + that.x, this.y + that.y);
},
/**
* Adds another point to this one
* @param {fabric.Point} that
* @return {fabric.Point} thisArg
*/
addEquals: function (that) {
this.x += that.x;
this.y += that.y;
return this;
},
/**
* Adds value to this point and returns a new one
* @param {Number} scalar
* @return {fabric.Point} new Point with added value
*/
scalarAdd: function (scalar) {
return new Point(this.x + scalar, this.y + scalar);
},
/**
* Adds value to this point
* @param {Number} scalar
* @param {fabric.Point} thisArg
*/
scalarAddEquals: function (scalar) {
this.x += scalar;
this.y += scalar;
return this;
},
/**
* Subtracts another point from this point and returns a new one
* @param {fabric.Point} that
* @return {fabric.Point} new Point object with subtracted values
*/
subtract: function (that) {
return new Point(this.x - that.x, this.y - that.y);
},
/**
* Subtracts another point from this point
* @param {fabric.Point} that
* @return {fabric.Point} thisArg
*/
subtractEquals: function (that) {
this.x -= that.x;
this.y -= that.y;
return this;
},
/**
* Subtracts value from this point and returns a new one
* @param {Number} scalar
* @return {fabric.Point}
*/
scalarSubtract: function (scalar) {
return new Point(this.x - scalar, this.y - scalar);
},
/**
* Subtracts value from this point
* @param {Number} scalar
* @return {fabric.Point} thisArg
*/
scalarSubtractEquals: function (scalar) {
this.x -= scalar;
this.y -= scalar;
return this;
},
/**
* Miltiplies this point by a value and returns a new one
* @param {Number} scalar
* @return {fabric.Point}
*/
multiply: function (scalar) {
return new Point(this.x * scalar, this.y * scalar);
},
/**
* Miltiplies this point by a value
* @param {Number} scalar
* @return {fabric.Point} thisArg
*/
multiplyEquals: function (scalar) {
this.x *= scalar;
this.y *= scalar;
return this;
},
/**
* Divides this point by a value and returns a new one
* @param {Number} scalar
* @return {fabric.Point}
*/
divide: function (scalar) {
return new Point(this.x / scalar, this.y / scalar);
},
/**
* Divides this point by a value
* @param {Number} scalar
* @return {fabric.Point} thisArg
*/
divideEquals: function (scalar) {
this.x /= scalar;
this.y /= scalar;
return this;
},
/**
* Returns true if this point is equal to another one
* @param {fabric.Point} that
* @return {Boolean}
*/
eq: function (that) {
return (this.x === that.x && this.y === that.y);
},
/**
* Returns true if this point is less than another one
* @param {fabric.Point} that
* @return {Boolean}
*/
lt: function (that) {
return (this.x < that.x && this.y < that.y);
},
/**
* Returns true if this point is less than or equal to another one
* @param {fabric.Point} that
* @return {Boolean}
*/
lte: function (that) {
return (this.x <= that.x && this.y <= that.y);
},
/**
* Returns true if this point is greater another one
* @param {fabric.Point} that
* @return {Boolean}
*/
gt: function (that) {
return (this.x > that.x && this.y > that.y);
},
/**
* Returns true if this point is greater than or equal to another one
* @param {fabric.Point} that
* @return {Boolean}
*/
gte: function (that) {
return (this.x >= that.x && this.y >= that.y);
},
/**
* Returns new point which is the result of linear interpolation with this one and another one
* @param {fabric.Point} that
* @param {Number} t
* @return {fabric.Point}
*/
lerp: function (that, t) {
return new Point(this.x + (that.x - this.x) * t, this.y + (that.y - this.y) * t);
},
/**
* Returns distance from this point and another one
* @param {fabric.Point} that
* @return {Number}
*/
distanceFrom: function (that) {
var dx = this.x - that.x,
dy = this.y - that.y;
return Math.sqrt(dx * dx + dy * dy);
},
/**
* Returns the point between this point and another one
* @param {fabric.Point} that
* @return {fabric.Point}
*/
midPointFrom: function (that) {
return new Point(this.x + (that.x - this.x)/2, this.y + (that.y - this.y)/2);
},
/**
* Returns a new point which is the min of this and another one
* @param {fabric.Point} that
* @return {fabric.Point}
*/
min: function (that) {
return new Point(Math.min(this.x, that.x), Math.min(this.y, that.y));
},
/**
* Returns a new point which is the max of this and another one
* @param {fabric.Point} that
* @return {fabric.Point}
*/
max: function (that) {
return new Point(Math.max(this.x, that.x), Math.max(this.y, that.y));
},
/**
* Returns string representation of this point
* @return {String}
*/
toString: function () {
return this.x + "," + this.y;
},
/**
* Sets x/y of this point
* @param {Number} x
* @return {Number} y
*/
setXY: function (x, y) {
this.x = x;
this.y = y;
},
/**
* Sets x/y of this point from another point
* @param {fabric.Point} that
*/
setFromPoint: function (that) {
this.x = that.x;
this.y = that.y;
},
/**
* Swaps x/y of this point and another point
* @param {fabric.Point} that
*/
swap: function (that) {
var x = this.x,
y = this.y;
this.x = that.x;
this.y = that.y;
that.x = x;
that.y = y;
}
};
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
"use strict";
/* Adaptation of work of Kevin Lindsey (kevin@kevlindev.com) */
var fabric = global.fabric || (global.fabric = { });
if (fabric.Intersection) {
fabric.warn('fabric.Intersection is already defined');
return;
}
/**
* Intersection class
* @class fabric.Intersection
* @memberOf fabric
* @constructor
*/
function Intersection(status) {
this.status = status;
this.points = [];
}
fabric.Intersection = Intersection;
fabric.Intersection.prototype = /** @lends fabric.Intersection.prototype */ {
/**
* Appends a point to intersection
* @param {fabric.Point} point
*/
appendPoint: function (point) {
this.points.push(point);
},
/**
* Appends points to intersection
* @param {Array} points
*/
appendPoints: function (points) {
this.points = this.points.concat(points);
}
};
/**
* Checks if one line intersects another
* @static
* @param {fabric.Point} a1
* @param {fabric.Point} a2
* @param {fabric.Point} b1
* @param {fabric.Point} b2
* @return {fabric.Intersection}
*/
fabric.Intersection.intersectLineLine = function (a1, a2, b1, b2) {
var result,
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();
}
}
else {
if (ua_t === 0 || ub_t === 0) {
result = new Intersection("Coincident");
}
else {
result = new Intersection("Parallel");
}
}
return result;
};
/**
* Checks if line intersects polygon
* @static
* @param {fabric.Point} a1
* @param {fabric.Point} a2
* @param {Array} points
* @return {fabric.Intersection}
*/
fabric.Intersection.intersectLinePolygon = function(a1,a2,points){
var result = new Intersection(),
length = points.length;
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;
};
/**
* Checks if polygon intersects another polygon
* @static
* @param {Array} points1
* @param {Array} points2
* @return {fabric.Intersection}
*/
fabric.Intersection.intersectPolygonPolygon = function (points1, points2) {
var result = new Intersection(),
length = points1.length;
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;
};
/**
* Checks if polygon intersects rectangle
* @static
* @param {Array} points
* @param {Number} r1
* @param {Number} r2
* @return {fabric.Intersection}
*/
fabric.Intersection.intersectPolygonRectangle = function (points, r1, r2) {
var min = r1.min(r2),
max = r1.max(r2),
topRight = new fabric.Point(max.x, min.y),
bottomLeft = new fabric.Point(min.x, max.y),
inter1 = Intersection.intersectLinePolygon(min, topRight, points),
inter2 = Intersection.intersectLinePolygon(topRight, max, points),
inter3 = Intersection.intersectLinePolygon(max, bottomLeft, points),
inter4 = Intersection.intersectLinePolygon(bottomLeft, min, points),
result = new Intersection();
result.appendPoints(inter1.points);
result.appendPoints(inter2.points);
result.appendPoints(inter3.points);
result.appendPoints(inter4.points);
if (result.points.length > 0) {
result.status = "Intersection";
}
return result;
};
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
"use strict";
var fabric = global.fabric || (global.fabric = { });
if (fabric.Color) {
fabric.warn('fabric.Color is already defined.');
return;
}
/**
* Color class
* The purpose of {@link fabric.Color} is to abstract and encapsulate common color operations;
* {@link fabric.Color} is a constructor and creates instances of {@link fabric.Color} objects.
*
* @class fabric.Color
* @param {String} color optional in hex or rgb(a) format
* @return {fabric.Color} thisArg
*/
function Color(color) {
if (!color) {
this.setSource([0, 0, 0, 1]);
}
else {
this._tryParsingColor(color);
}
}
fabric.Color = Color;
fabric.Color.prototype = /** @lends fabric.Color.prototype */ {
/**
* @private
* @param {String|Array} color Color value to parse
*/
_tryParsingColor: function(color) {
var source;
if (color in Color.colorNameMap) {
color = Color.colorNameMap[color];
}
source = Color.sourceFromHex(color);
if (!source) {
source = Color.sourceFromRgb(color);
}
if (!source) {
source = Color.sourceFromHsl(color);
}
if (source) {
this.setSource(source);
}
},
/**
* Adapted from <a href="https://rawgithub.com/mjijackson/mjijackson.github.com/master/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript.html">https://github.com/mjijackson</a>
* @private
* @param {Number} r Red color value
* @param {Number} g Green color value
* @param {Number} b Blue color value
* @return {Array} Hsl color
*/
_rgbToHsl: function(r, g, b) {
r /= 255, g /= 255, b /= 255;
var h, s, l,
max = fabric.util.array.max([r, g, b]),
min = fabric.util.array.min([r, g, b]);
l = (max + min) / 2;
if (max === min) {
h = s = 0; // achromatic
}
else {
var d = max - min;
s = l > 0.5 ? d / (2 - max - min) : d / (max + min);
switch (max) {
case r:
h = (g - b) / d + (g < b ? 6 : 0);
break;
case g:
h = (b - r) / d + 2;
break;
case b:
h = (r - g) / d + 4;
break;
}
h /= 6;
}
return [
Math.round(h * 360),
Math.round(s * 100),
Math.round(l * 100)
];
},
/**
* Returns source of this color (where source is an array representation; ex: [200, 200, 100, 1])
* @return {Array}
*/
getSource: function() {
return this._source;
},
/**
* Sets source of this color (where source is an array representation; ex: [200, 200, 100, 1])
* @param {Array} source
*/
setSource: function(source) {
this._source = source;
},
/**
* Returns color represenation in RGB format
* @return {String} ex: rgb(0-255,0-255,0-255)
*/
toRgb: function() {
var source = this.getSource();
return 'rgb(' + source[0] + ',' + source[1] + ',' + source[2] + ')';
},
/**
* Returns color represenation in RGBA format
* @return {String} ex: rgba(0-255,0-255,0-255,0-1)
*/
toRgba: function() {
var source = this.getSource();
return 'rgba(' + source[0] + ',' + source[1] + ',' + source[2] + ',' + source[3] + ')';
},
/**
* Returns color represenation in HSL format
* @return {String} ex: hsl(0-360,0%-100%,0%-100%)
*/
toHsl: function() {
var source = this.getSource(),
hsl = this._rgbToHsl(source[0], source[1], source[2]);
return 'hsl(' + hsl[0] + ',' + hsl[1] + '%,' + hsl[2] + '%)';
},
/**
* Returns color represenation in HSLA format
* @return {String} ex: hsla(0-360,0%-100%,0%-100%,0-1)
*/
toHsla: function() {
var source = this.getSource(),
hsl = this._rgbToHsl(source[0], source[1], source[2]);
return 'hsla(' + hsl[0] + ',' + hsl[1] + '%,' + hsl[2] + '%,' + source[3] + ')';
},
/**
* Returns color represenation in HEX format
* @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
* @return {Number} 0-1
*/
getAlpha: function() {
return this.getSource()[3];
},
/**
* Sets value of alpha channel for this color
* @param {Number} alpha Alpha value 0-1
* @return {fabric.Color} thisArg
*/
setAlpha: function(alpha) {
var source = this.getSource();
source[3] = alpha;
this.setSource(source);
return this;
},
/**
* Transforms color to its grayscale representation
* @return {fabric.Color} thisArg
*/
toGrayscale: function() {
var source = this.getSource(),
average = parseInt((source[0] * 0.3 + source[1] * 0.59 + source[2] * 0.11).toFixed(0), 10),
currentAlpha = source[3];
this.setSource([average, average, average, currentAlpha]);
return this;
},
/**
* Transforms color to its black and white representation
* @param {Number} threshold
* @return {fabric.Color} thisArg
*/
toBlackWhite: function(threshold) {
var source = this.getSource(),
average = (source[0] * 0.3 + source[1] * 0.59 + source[2] * 0.11).toFixed(0),
currentAlpha = source[3];
threshold = threshold || 127;
average = (Number(average) < Number(threshold)) ? 0 : 255;
this.setSource([average, average, average, currentAlpha]);
return this;
},
/**
* Overlays color with another color
* @param {String|fabric.Color} otherColor
* @return {fabric.Color} thisArg
*/
overlayWith: function(otherColor) {
if (!(otherColor instanceof Color)) {
otherColor = new Color(otherColor);
}
var result = [],
alpha = this.getAlpha(),
otherAlpha = 0.5,
source = this.getSource(),
otherSource = otherColor.getSource();
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), rgba(255, 100, 10, 0.5), rgba( 255 , 100 , 10 , 0.5 ), rgb(1,1,1), rgba(100%, 60%, 10%, 0.5))
* @static
* @field
* @memberOf fabric.Color
*/
fabric.Color.reRGBa = /^rgba?\(\s*(\d{1,3}\%?)\s*,\s*(\d{1,3}\%?)\s*,\s*(\d{1,3}\%?)\s*(?:\s*,\s*(\d+(?:\.\d+)?)\s*)?\)$/;
/**
* Regex matching color in HSL or HSLA formats (ex: hsl(200, 80%, 10%), hsla(300, 50%, 80%, 0.5), hsla( 300 , 50% , 80% , 0.5 ))
* @static
* @field
* @memberOf fabric.Color
*/
fabric.Color.reHSLa = /^hsla?\(\s*(\d{1,3})\s*,\s*(\d{1,3}\%)\s*,\s*(\d{1,3}\%)\s*(?:\s*,\s*(\d+(?:\.\d+)?)\s*)?\)$/;
/**
* Regex matching color in HEX format (ex: #FF5555, 010155, aff)
* @static
* @field
* @memberOf fabric.Color
*/
fabric.Color.reHex = /^#?([0-9a-f]{6}|[0-9a-f]{3})$/i;
/**
* Map of the 17 basic color names with HEX code
* @static
* @field
* @memberOf fabric.Color
* @see: http://www.w3.org/TR/CSS2/syndata.html#color-units
*/
fabric.Color.colorNameMap = {
'aqua': '#00FFFF',
'black': '#000000',
'blue': '#0000FF',
'fuchsia': '#FF00FF',
'gray': '#808080',
'green': '#008000',
'lime': '#00FF00',
'maroon': '#800000',
'navy': '#000080',
'olive': '#808000',
'orange': '#FFA500',
'purple': '#800080',
'red': '#FF0000',
'silver': '#C0C0C0',
'teal': '#008080',
'white': '#FFFFFF',
'yellow': '#FFFF00'
};
/**
* @private
* @param {Number} p
* @param {Number} q
* @param {Number} t
* @return {Number}
*/
function hue2rgb(p, q, t){
if (t < 0) t += 1;
if (t > 1) t -= 1;
if (t < 1/6) return p + (q - p) * 6 * t;
if (t < 1/2) return q;
if (t < 2/3) return p + (q - p) * (2/3 - t) * 6;
return p;
}
/**
* Returns new color object, when given a color in RGB format
* @memberOf fabric.Color
* @param {String} color Color value ex: rgb(0-255,0-255,0-255)
* @return {fabric.Color}
*/
fabric.Color.fromRgb = function(color) {
return Color.fromSource(Color.sourceFromRgb(color));
};
/**
* Returns array represenatation (ex: [100, 100, 200, 1]) of a color that's in RGB or RGBA format
* @memberOf fabric.Color
* @param {String} color Color value ex: rgb(0-255,0-255,0-255), rgb(0%-100%,0%-100%,0%-100%)
* @return {Array} source
*/
fabric.Color.sourceFromRgb = function(color) {
var match = color.match(Color.reRGBa);
if (match) {
var r = parseInt(match[1], 10) / (/%$/.test(match[1]) ? 100 : 1) * (/%$/.test(match[1]) ? 255 : 1),
g = parseInt(match[2], 10) / (/%$/.test(match[2]) ? 100 : 1) * (/%$/.test(match[2]) ? 255 : 1),
b = parseInt(match[3], 10) / (/%$/.test(match[3]) ? 100 : 1) * (/%$/.test(match[3]) ? 255 : 1);
return [
parseInt(r, 10),
parseInt(g, 10),
parseInt(b, 10),
match[4] ? parseFloat(match[4]) : 1
];
}
};
/**
* Returns new color object, when given a color in RGBA format
* @static
* @function
* @memberOf fabric.Color
* @param {String} color
* @return {fabric.Color}
*/
fabric.Color.fromRgba = Color.fromRgb;
/**
* Returns new color object, when given a color in HSL format
* @param {String} color Color value ex: hsl(0-260,0%-100%,0%-100%)
* @memberOf fabric.Color
* @return {fabric.Color}
*/
fabric.Color.fromHsl = function(color) {
return Color.fromSource(Color.sourceFromHsl(color));
};
/**
* Returns array represenatation (ex: [100, 100, 200, 1]) of a color that's in HSL or HSLA format.
* Adapted from <a href="https://rawgithub.com/mjijackson/mjijackson.github.com/master/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript.html">https://github.com/mjijackson</a>
* @memberOf fabric.Color
* @param {String} color Color value ex: hsl(0-360,0%-100%,0%-100%) or hsla(0-360,0%-100%,0%-100%, 0-1)
* @return {Array} source
* @see http://http://www.w3.org/TR/css3-color/#hsl-color
*/
fabric.Color.sourceFromHsl = function(color) {
var match = color.match(Color.reHSLa);
if (!match) return;
var h = (((parseFloat(match[1]) % 360) + 360) % 360) / 360,
s = parseFloat(match[2]) / (/%$/.test(match[2]) ? 100 : 1),
l = parseFloat(match[3]) / (/%$/.test(match[3]) ? 100 : 1),
r, g, b;
if (s === 0) {
r = g = b = l;
}
else {
var q = l <= 0.5 ? l * (s + 1) : l + s - l * s;
var p = l * 2 - q;
r = hue2rgb(p, q, h + 1/3);
g = hue2rgb(p, q, h);
b = hue2rgb(p, q, h - 1/3);
}
return [
Math.round(r * 255),
Math.round(g * 255),
Math.round(b * 255),
match[4] ? parseFloat(match[4]) : 1
];
};
/**
* Returns new color object, when given a color in HSLA format
* @static
* @function
* @memberOf fabric.Color
* @param {String} color
* @return {fabric.Color}
*/
fabric.Color.fromHsla = Color.fromHsl;
/**
* Returns new color object, when given a color in HEX format
* @static
* @memberOf fabric.Color
* @param {String} color Color value ex: FF5555
* @return {fabric.Color}
*/
fabric.Color.fromHex = function(color) {
return Color.fromSource(Color.sourceFromHex(color));
};
/**
* Returns array represenatation (ex: [100, 100, 200, 1]) of a color that's in HEX format
* @static
* @memberOf fabric.Color
* @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
* @memberOf fabric.Color
* @param {Array} source
* @return {fabric.Color}
*/
fabric.Color.fromSource = function(source) {
var oColor = new Color();
oColor.setSource(source);
return oColor;
};
})(typeof exports !== 'undefined' ? exports : this);
(function() {
/* _FROM_SVG_START_ */
function getColorStop(el) {
var style = el.getAttribute('style'),
offset = el.getAttribute('offset'),
color, opacity;
// convert percents to absolute values
offset = parseFloat(offset) / (/%$/.test(offset) ? 100 : 1);
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') {
color = value;
}
else if (key === 'stop-opacity') {
opacity = value;
}
}
}
if (!color) {
color = el.getAttribute('stop-color') || 'rgb(0,0,0)';
}
if (!opacity) {
opacity = el.getAttribute('stop-opacity');
}
// convert rgba color to rgb color - alpha value has no affect in svg
color = new fabric.Color(color).toRgb();
return {
offset: offset,
color: color,
opacity: isNaN(parseFloat(opacity)) ? 1 : parseFloat(opacity)
};
}
/* _FROM_SVG_END_ */
/**
* Gradient class
* @class fabric.Gradient
*/
fabric.Gradient = fabric.util.createClass(/** @lends fabric.Gradient.prototype */ {
/**
* Constructor
* @param {Object} [options] Options object with type, coords, gradientUnits and colorStops
* @return {fabric.Gradient} thisArg
*/
initialize: function(options) {
options || (options = { });
var coords = { };
this.id = fabric.Object.__uid++;
this.type = options.type || 'linear';
coords = {
x1: options.coords.x1 || 0,
y1: options.coords.y1 || 0,
x2: options.coords.x2 || 0,
y2: options.coords.y2 || 0
};
if (this.type === 'radial') {
coords.r1 = options.coords.r1 || 0;
coords.r2 = options.coords.r2 || 0;
}
this.coords = coords;
this.gradientUnits = options.gradientUnits || 'objectBoundingBox';
this.colorStops = options.colorStops.slice();
},
/**
* Adds another colorStop
* @param {Object} colorStop Object with offset and color
* @return {fabric.Gradient} thisArg
*/
addColorStop: function(colorStop) {
for (var position in colorStop) {
var color = new fabric.Color(colorStop[position]);
this.colorStops.push({offset: position, color: color.toRgb(), opacity: color.getAlpha()});
}
return this;
},
/**
* Returns object representation of a gradient
* @return {Object}
*/
toObject: function() {
return {
type: this.type,
coords: this.coords,
gradientUnits: this.gradientUnits,
colorStops: this.colorStops
};
},
/* _TO_SVG_START_ */
/**
* Returns SVG representation of an gradient
* @param {Object} object Object to create a gradient for
* @param {Boolean} normalize Whether coords should be normalized
* @return {String} SVG representation of an gradient (linear/radial)
*/
toSVG: function(object, normalize) {
var coords = fabric.util.object.clone(this.coords),
markup;
// colorStops must be sorted ascending
this.colorStops.sort(function(a, b) {
return a.offset - b.offset;
});
if (normalize && this.gradientUnits === 'userSpaceOnUse') {
coords.x1 += object.width / 2;
coords.y1 += object.height / 2;
coords.x2 += object.width / 2;
coords.y2 += object.height / 2;
}
else if (this.gradientUnits === 'objectBoundingBox') {
_convertValuesToPercentUnits(object, coords);
}
if (this.type === 'linear') {
markup = [
'<linearGradient ',
'id="SVGID_', this.id,
'" gradientUnits="', this.gradientUnits,
'" x1="', coords.x1,
'" y1="', coords.y1,
'" x2="', coords.x2,
'" y2="', coords.y2,
'">'
];
}
else if (this.type === 'radial') {
markup = [
'<radialGradient ',
'id="SVGID_', this.id,
'" gradientUnits="', this.gradientUnits,
'" cx="', coords.x2,
'" cy="', coords.y2,
'" r="', coords.r2,
'" fx="', coords.x1,
'" fy="', coords.y1,
'">'
];
}
for (var i = 0; i < this.colorStops.length; i++) {
markup.push(
'<stop ',
'offset="', (this.colorStops[i].offset * 100) + '%',
'" style="stop-color:', this.colorStops[i].color,
(this.colorStops[i].opacity ? ';stop-opacity: ' + this.colorStops[i].opacity : ';'),
'"/>'
);
}
markup.push((this.type === 'linear' ? '</linearGradient>' : '</radialGradient>'));
return markup.join('');
},
/* _TO_SVG_END_ */
/**
* Returns an instance of CanvasGradient
* @param {CanvasRenderingContext2D} ctx Context to render on
* @return {CanvasGradient}
*/
toLive: function(ctx) {
var gradient;
if (!this.type) return;
if (this.type === 'linear') {
gradient = ctx.createLinearGradient(
this.coords.x1, this.coords.y1, this.coords.x2, this.coords.y2);
}
else if (this.type === 'radial') {
gradient = ctx.createRadialGradient(
this.coords.x1, this.coords.y1, this.coords.r1, this.coords.x2, this.coords.y2, this.coords.r2);
}
for (var i = 0, len = this.colorStops.length; i < len; i++) {
var color = this.colorStops[i].color,
opacity = this.colorStops[i].opacity,
offset = this.colorStops[i].offset;
if (typeof opacity !== 'undefined') {
color = new fabric.Color(color).setAlpha(opacity).toRgba();
}
gradient.addColorStop(parseFloat(offset), color);
}
return gradient;
}
});
fabric.util.object.extend(fabric.Gradient, {
/* _FROM_SVG_START_ */
/**
* Returns {@link fabric.Gradient} instance from an SVG element
* @static
* @memberof fabric.Gradient
* @param {SVGGradientElement} el SVG gradient element
* @param {fabric.Object} instance
* @return {fabric.Gradient} Gradient instance
* @see http://www.w3.org/TR/SVG/pservers.html#LinearGradientElement
* @see http://www.w3.org/TR/SVG/pservers.html#RadialGradientElement
*/
fromElement: function(el, instance) {
/**
* @example:
*
* <linearGradient id="linearGrad1">
* <stop offset="0%" stop-color="white"/>
* <stop offset="100%" stop-color="black"/>
* </linearGradient>
*
* OR
*
* <linearGradient id="linearGrad2">
* <stop offset="0" style="stop-color:rgb(255,255,255)"/>
* <stop offset="1" style="stop-color:rgb(0,0,0)"/>
* </linearGradient>
*
* OR
*
* <radialGradient id="radialGrad1">
* <stop offset="0%" stop-color="white" stop-opacity="1" />
* <stop offset="50%" stop-color="black" stop-opacity="0.5" />
* <stop offset="100%" stop-color="white" stop-opacity="1" />
* </radialGradient>
*
* OR
*
* <radialGradient id="radialGrad2">
* <stop offset="0" stop-color="rgb(255,255,255)" />
* <stop offset="0.5" stop-color="rgb(0,0,0)" />
* <stop offset="1" stop-color="rgb(255,255,255)" />
* </radialGradient>
*
*/
var colorStopEls = el.getElementsByTagName('stop'),
type = (el.nodeName === 'linearGradient' ? 'linear' : 'radial'),
gradientUnits = el.getAttribute('gradientUnits') || 'objectBoundingBox',
colorStops = [],
coords = { };
if (type === 'linear') {
coords = {
x1: el.getAttribute('x1') || 0,
y1: el.getAttribute('y1') || 0,
x2: el.getAttribute('x2') || '100%',
y2: el.getAttribute('y2') || 0
};
}
else if (type === 'radial') {
coords = {
x1: el.getAttribute('fx') || el.getAttribute('cx') || '50%',
y1: el.getAttribute('fy') || el.getAttribute('cy') || '50%',
r1: 0,
x2: el.getAttribute('cx') || '50%',
y2: el.getAttribute('cy') || '50%',
r2: el.getAttribute('r') || '50%'
};
}
for (var i = colorStopEls.length; i--; ) {
colorStops.push(getColorStop(colorStopEls[i]));
}
_convertPercentUnitsToValues(instance, coords);
return new fabric.Gradient({
type: type,
coords: coords,
gradientUnits: gradientUnits,
colorStops: colorStops
});
},
/* _FROM_SVG_END_ */
/**
* Returns {@link fabric.Gradient} instance from its object representation
* @static
* @memberof fabric.Gradient
* @param {Object} obj
* @param {Object} [options] Options object
*/
forObject: function(obj, options) {
options || (options = { });
_convertPercentUnitsToValues(obj, options);
return new fabric.Gradient(options);
}
});
/**
* @private
*/
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' || prop === 'r2') {
options[prop] = fabric.util.toFixed(object.width * percents / 100, 2);
}
else if (prop === 'y1' || prop === 'y2') {
options[prop] = fabric.util.toFixed(object.height * percents / 100, 2);
}
}
// normalize rendering point (should be from top/left corner rather than center of the shape)
if (prop === 'x1' || prop === 'x2') {
options[prop] -= fabric.util.toFixed(object.width / 2, 2);
}
else if (prop === 'y1' || prop === 'y2') {
options[prop] -= fabric.util.toFixed(object.height / 2, 2);
}
}
}
/* _TO_SVG_START_ */
/**
* @private
*/
function _convertValuesToPercentUnits(object, options) {
for (var prop in options) {
// normalize rendering point (should be from center rather than top/left corner of the shape)
if (prop === 'x1' || prop === 'x2') {
options[prop] += fabric.util.toFixed(object.width / 2, 2);
}
else if (prop === 'y1' || prop === 'y2') {
options[prop] += fabric.util.toFixed(object.height / 2, 2);
}
// convert to percent units
if (prop === 'x1' || prop === 'x2' || prop === 'r2') {
options[prop] = fabric.util.toFixed(options[prop] / object.width * 100, 2) + '%';
}
else if (prop === 'y1' || prop === 'y2') {
options[prop] = fabric.util.toFixed(options[prop] / object.height * 100, 2) + '%';
}
}
}
/* _TO_SVG_END_ */
})();
/**
* Pattern class
* @class fabric.Pattern
*/
fabric.Pattern = fabric.util.createClass(/** @lends fabric.Pattern.prototype */ {
/**
* Repeat property of a pattern (one of repeat, repeat-x, repeat-y or no-repeat)
* @type String
* @default
*/
repeat: 'repeat',
/**
* Pattern horizontal offset from object's left/top corner
* @type Number
* @default
*/
offsetX: 0,
/**
* Pattern vertical offset from object's left/top corner
* @type Number
* @default
*/
offsetY: 0,
/**
* Constructor
* @param {Object} [options] Options object
* @return {fabric.Pattern} thisArg
*/
initialize: function(options) {
options || (options = { });
this.id = fabric.Object.__uid++;
if (options.source) {
if (typeof options.source === 'string') {
// function string
if (typeof fabric.util.getFunctionBody(options.source) !== 'undefined') {
this.source = new Function(fabric.util.getFunctionBody(options.source));
}
else {
// img src string
var _this = this;
this.source = fabric.util.createImage();
fabric.util.loadImage(options.source, function(img) {
_this.source = img;
});
}
}
else {
// img element
this.source = options.source;
}
}
if (options.repeat) {
this.repeat = options.repeat;
}
if (options.offsetX) {
this.offsetX = options.offsetX;
}
if (options.offsetY) {
this.offsetY = options.offsetY;
}
},
/**
* Returns object representation of a pattern
* @return {Object} Object representation of a pattern instance
*/
toObject: function() {
var source;
// callback
if (typeof this.source === 'function') {
source = String(this.source);
}
// <img> element
else if (typeof this.source.src === 'string') {
source = this.source.src;
}
return {
source: source,
repeat: this.repeat,
offsetX: this.offsetX,
offsetY: this.offsetY
};
},
/* _TO_SVG_START_ */
/**
* Returns SVG representation of a pattern
* @param {fabric.Object} object
* @return {String} SVG representation of a pattern
*/
toSVG: function(object) {
var patternSource = typeof this.source === 'function' ? this.source() : this.source;
var patternWidth = patternSource.width / object.getWidth();
var patternHeight = patternSource.height / object.getHeight();
var patternImgSrc = '';
if (patternSource.src) {
patternImgSrc = patternSource.src;
}
else if (patternSource.toDataURL) {
patternImgSrc = patternSource.toDataURL();
}
return '<pattern id="SVGID_' + this.id +
'" x="' + this.offsetX +
'" y="' + this.offsetY +
'" width="' + patternWidth +
'" height="' + patternHeight + '">' +
'<image x="0" y="0"' +
' width="' + patternSource.width +
'" height="' + patternSource.height +
'" xlink:href="' + patternImgSrc +
'"></image>' +
'</pattern>';
},
/* _TO_SVG_END_ */
/**
* Returns an instance of CanvasPattern
* @param {CanvasRenderingContext2D} ctx Context to create pattern
* @return {CanvasPattern}
*/
toLive: function(ctx) {
var source = typeof this.source === 'function' ? this.source() : this.source;
return ctx.createPattern(source, this.repeat);
}
});
(function(global) {
"use strict";
var fabric = global.fabric || (global.fabric = { });
if (fabric.Shadow) {
fabric.warn('fabric.Shadow is already defined.');
return;
}
/**
* Shadow class
* @class fabric.Shadow
*/
fabric.Shadow = fabric.util.createClass(/** @lends fabric.Shadow.prototype */ {
/**
* Shadow color
* @type String
* @default
*/
color: 'rgb(0,0,0)',
/**
* Shadow blur
* @type Number
*/
blur: 0,
/**
* Shadow horizontal offset
* @type Number
* @default
*/
offsetX: 0,
/**
* Shadow vertical offset
* @type Number
* @default
*/
offsetY: 0,
/**
* Whether the shadow should affect stroke operations
* @type Boolean
* @default
*/
affectStroke: false,
/**
* Constructor
* @param {Object|String} [options] Options object with any of color, blur, offsetX, offsetX properties or string (e.g. "rgba(0,0,0,0.2) 2px 2px 10px, "2px 2px 10px rgba(0,0,0,0.2)")
* @return {fabric.Shadow} thisArg
*/
initialize: function(options) {
if (typeof options === 'string') {
options = this._parseShadow(options);
}
for (var prop in options) {
this[prop] = options[prop];
}
this.id = fabric.Object.__uid++;
},
/**
* @private
* @param {String} shadow Shadow value to parse
* @return {Object} Shadow object with color, offsetX, offsetY and blur
*/
_parseShadow: function(shadow) {
var shadowStr = shadow.trim();
var offsetsAndBlur = fabric.Shadow.reOffsetsAndBlur.exec(shadowStr) || [ ],
color = shadowStr.replace(fabric.Shadow.reOffsetsAndBlur, '') || 'rgb(0,0,0)';
return {
color: color.trim(),
offsetX: parseInt(offsetsAndBlur[1], 10) || 0,
offsetY: parseInt(offsetsAndBlur[2], 10) || 0,
blur: parseInt(offsetsAndBlur[3], 10) || 0
};
},
/**
* Returns a string representation of an instance
* @see http://www.w3.org/TR/css-text-decor-3/#text-shadow
* @return {String} Returns CSS3 text-shadow declaration
*/
toString: function() {
return [this.offsetX, this.offsetY, this.blur, this.color].join('px ');
},
/* _TO_SVG_START_ */
/**
* Returns SVG representation of a shadow
* @param {fabric.Object} object
* @return {String} SVG representation of a shadow
*/
toSVG: function(object) {
var mode = 'SourceAlpha';
if (object && (object.fill === this.color || object.stroke === this.color)) {
mode = 'SourceGraphic';
}
return (
'<filter id="SVGID_' + this.id + '" y="-40%" height="180%">' +
'<feGaussianBlur in="' + mode + '" stdDeviation="' +
(this.blur ? this.blur / 3 : 0) +
'"></feGaussianBlur>' +
'<feOffset dx="' + this.offsetX + '" dy="' + this.offsetY + '"></feOffset>' +
'<feMerge>' +
'<feMergeNode></feMergeNode>' +
'<feMergeNode in="SourceGraphic"></feMergeNode>' +
'</feMerge>' +
'</filter>');
},
/* _TO_SVG_END_ */
/**
* Returns object representation of a shadow
* @return {Object} Object representation of a shadow instance
*/
toObject: function() {
return {
color: this.color,
blur: this.blur,
offsetX: this.offsetX,
offsetY: this.offsetY
};
}
});
/**
* Regex matching shadow offsetX, offsetY and blur (ex: "2px 2px 10px rgba(0,0,0,0.2)", "rgb(0,255,0) 2px 2px")
* @static
* @field
* @memberOf fabric.Shadow
*/
fabric.Shadow.reOffsetsAndBlur = /(?:\s|^)(-?\d+(?:px)?(?:\s?|$))?(-?\d+(?:px)?(?:\s?|$))?(\d+(?:px)?)?(?:\s?|$)(?:$|\s)/;
})(typeof exports !== 'undefined' ? exports : this);
(function () {
"use strict";
if (fabric.StaticCanvas) {
fabric.warn('fabric.StaticCanvas is already defined.');
return;
}
// aliases for faster resolution
var extend = fabric.util.object.extend,
getElementOffset = fabric.util.getElementOffset,
removeFromArray = fabric.util.removeFromArray,
removeListener = fabric.util.removeListener,
CANVAS_INIT_ERROR = new Error('Could not initialize `canvas` element');
/**
* Static canvas class
* @class fabric.StaticCanvas
* @mixes fabric.Collection
* @mixes fabric.Observable
*/
fabric.StaticCanvas = fabric.util.createClass(/** @lends fabric.StaticCanvas.prototype */ {
/**
* Constructor
* @param {HTMLElement | String} el &lt;canvas> element to initialize instance on
* @param {Object} [options] Options object
* @return {Object} thisArg
*/
initialize: function(el, options) {
options || (options = { });
this._initStatic(el, options);
fabric.StaticCanvas.activeInstance = this;
},
/**
* Background color of canvas instance
* @type String
* @default
*/
backgroundColor: '',
/**
* Background image of canvas instance
* Should be set via {@link fabric.StaticCanvas#setBackgroundImage}
* @type String
* @default
*/
backgroundImage: '',
/**
* Opacity of the background image of the canvas instance
* @type Float
* @default
*/
backgroundImageOpacity: 1,
/**
* Indicates whether the background image should be stretched to fit the
* dimensions of the canvas instance.
* @type Boolean
* @default
*/
backgroundImageStretch: true,
/**
* Overlay image of canvas instance
* Should be set via {@link fabric.StaticCanvas#setOverlayImage}
* @type String
* @default
*/
overlayImage: '',
/**
* Left offset of overlay image (if present)
* @type Number
* @default
*/
overlayImageLeft: 0,
/**
* Top offset of overlay image (if present)
* @type Number
* @default
*/
overlayImageTop: 0,
/**
* Indicates whether toObject/toDatalessObject should include default values
* @type Boolean
* @default
*/
includeDefaultValues: true,
/**
* Indicates whether objects' state should be saved
* @type Boolean
* @default
*/
stateful: true,
/**
* Indicates whether {@link fabric.Collection.add}, {@link fabric.Collection.insertAt} and {@link fabric.Collection.remove} should also re-render canvas.
* Disabling this option could give a great performance boost when adding/removing a lot of objects to/from canvas at once
* (followed by a manual rendering after addition/deletion)
* @type Boolean
* @default
*/
renderOnAddRemove: true,
/**
* Function that determines clipping of entire canvas area
* Being passed context as first argument. See clipping canvas area in {@link https://github.com/kangax/fabric.js/wiki/FAQ}
* @type Function
* @default
*/
clipTo: null,
/**
* Indicates whether object controls (borders/controls) are rendered above overlay image
* @type Boolean
* @default
*/
controlsAboveOverlay: false,
/**
* Indicates whether the browser can be scrolled when using a touchscreen and dragging on the canvas
* @type Boolean
* @default
*/
allowTouchScrolling: false,
/**
* Callback; invoked right before object is about to be scaled/rotated
* @param {fabric.Object} target Object that's about to be scaled/rotated
*/
onBeforeScaleRotate: function () {
/* NOOP */
},
/**
* @private
* @param {HTMLElement | String} el &lt;canvas> element to initialize instance on
* @param {Object} [options] Options object
*/
_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));
}
if (options.backgroundColor) {
this.setBackgroundColor(options.backgroundColor, 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
* @return {fabric.Canvas} instance
* @chainable
*/
calcOffset: function () {
this._offset = getElementOffset(this.lowerCanvasEl);
return this;
},
/**
* Sets overlay image for this canvas
* @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
* @param {Number} [options.overlayImageLeft] Left offset of overlay image
* @param {Number} [options.overlayImageTop] Top offset of 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
* @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
* @param {Float} [options.backgroundImageOpacity] Opacity of the background image of the canvas instance
* @param {Boolean} [options.backgroundImageStretch] Indicates whether the background image should be stretched to fit the canvas
* @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;
},
/**
* Sets background color for this canvas
* @param {String|fabric.Pattern} backgroundColor Color of pattern to set background color to
* @param {Function} callback callback to invoke when background color is set
* @return {fabric.Canvas} thisArg
* @chainable
*/
setBackgroundColor: function(backgroundColor, callback) {
if (backgroundColor.source) {
var _this = this;
fabric.util.loadImage(backgroundColor.source, function(img) {
_this.backgroundColor = new fabric.Pattern({
source: img,
repeat: backgroundColor.repeat
});
callback && callback();
});
}
else {
this.backgroundColor = backgroundColor;
callback && callback();
}
return this;
},
/**
* @private
*/
_createCanvasElement: function() {
var element = fabric.document.createElement('canvas');
if (!element.style) {
element.style = { };
}
if (!element) {
throw CANVAS_INIT_ERROR;
}
this._initCanvasElement(element);
return element;
},
/**
* @private
* @param {HTMLElement} element
*/
_initCanvasElement: function(element) {
fabric.util.createCanvasElement(element);
if (typeof element.getContext === 'undefined') {
throw CANVAS_INIT_ERROR;
}
},
/**
* @private
* @param {Object} [options] Options object
*/
_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 bottom canvas
* @private
* @param {HTMLElement} [canvasEl]
*/
_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 (in px)
* @return {Number}
*/
getWidth: function () {
return this.width;
},
/**
* Returns canvas height (in px)
* @return {Number}
*/
getHeight: function () {
return this.height;
},
/**
* Sets width of this canvas instance
* @param {Number} 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
* @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
* @param {Object} dimensions Object with width/height properties
* @param {Number} [dimensions.width] Width of canvas element
* @param {Number} [dimensions.height] Height of canvas element
* @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
* @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 &lt;canvas> element corresponding to this instance
* @return {HTMLCanvasElement}
*/
getElement: function () {
return this.lowerCanvasEl;
},
/**
* Returns currently selected object, if any
* @return {fabric.Object}
*/
getActiveObject: function() {
return null;
},
/**
* Returns currently selected group of object, if any
* @return {fabric.Group}
*/
getActiveGroup: function() {
return null;
},
/**
* Given a context, renders an object on that context
* @param {CanvasRenderingContext2D} ctx Context to render object on
* @param {fabric.Object} object Object to render
* @private
*/
_draw: function (ctx, object) {
if (!object) return;
if (this.controlsAboveOverlay) {
var hasBorders = object.hasBorders, hasControls = object.hasControls;
object.hasBorders = object.hasControls = false;
object.render(ctx);
object.hasBorders = hasBorders;
object.hasControls = hasControls;
}
else {
object.render(ctx);
}
},
/**
* @private
* @param {fabric.Object} obj Object that was added
*/
_onObjectAdded: function(obj) {
this.stateful && obj.setupState();
obj.setCoords();
obj.canvas = this;
this.fire('object:added', { target: obj });
obj.fire('added');
},
/**
* @private
* @param {fabric.Object} obj Object that was removed
*/
_onObjectRemoved: function(obj) {
this.fire('object:removed', { target: obj });
obj.fire('removed');
},
/**
* Returns an array of objects this instance has
* @return {Array}
*/
getObjects: function () {
return this._objects;
},
/**
* Clears specified context of canvas element
* @param {CanvasRenderingContext2D} ctx Context to clear
* @return {fabric.Canvas} thisArg
* @chainable
*/
clearContext: function(ctx) {
ctx.clearRect(0, 0, this.width, this.height);
return this;
},
/**
* Returns context of canvas where objects are drawn
* @return {CanvasRenderingContext2D}
*/
getContext: function () {
return this.contextContainer;
},
/**
* Clears all contexts (background, main, top) of an instance
* @return {fabric.Canvas} thisArg
* @chainable
*/
clear: function () {
this._objects.length = 0;
if (this.discardActiveGroup) {
this.discardActiveGroup();
}
if (this.discardActiveObject) {
this.discardActiveObject();
}
this.clearContext(this.contextContainer);
if (this.contextTop) {
this.clearContext(this.contextTop);
}
this.fire('canvas:cleared');
this.renderAll();
return this;
},
/**
* Renders both the top canvas and the secondary container canvas.
* @param {Boolean} [allOnTop] 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.selection && !this._groupSelector) {
this.clearContext(this.contextTop);
}
if (!allOnTop) {
this.clearContext(canvasToDrawOn);
}
this.fire('before:render');
if (this.clipTo) {
fabric.util.clipContext(this, canvasToDrawOn);
}
if (this.backgroundColor) {
canvasToDrawOn.fillStyle = this.backgroundColor.toLive
? this.backgroundColor.toLive(canvasToDrawOn)
: this.backgroundColor;
canvasToDrawOn.fillRect(
this.backgroundColor.offsetX || 0,
this.backgroundColor.offsetY || 0,
this.width,
this.height);
}
if (typeof this.backgroundImage === 'object') {
this._drawBackroundImage(canvasToDrawOn);
}
var activeGroup = this.getActiveGroup();
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.interactive) {
this.drawControls(canvasToDrawOn);
}
this.fire('after:render');
return this;
},
/**
* @private
* @param {CanvasRenderingContext2D} canvasToDrawOn Context to render on
*/
_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.
* @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/controls
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;
},
/**
* Returns coordinates of a center of canvas.
* Returned value is an object with top and left properties
* @return {Object} object with "top" and "left" number values
*/
getCenter: function () {
return {
top: this.getHeight() / 2,
left: this.getWidth() / 2
};
},
/**
* Centers object horizontally.
* You might need to call `setCoords` on an object after centering, to update controls area.
* @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.
* You might need to call `setCoords` on an object after centering, to update controls area.
* @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.
* You might need to call `setCoords` on an object after centering, to update controls area.
* @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
* @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output
* @return {String} json string
*/
toDatalessJSON: function (propertiesToInclude) {
return this.toDatalessObject(propertiesToInclude);
},
/**
* Returns object representation of canvas
* @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output
* @return {Object} object representation of an instance
*/
toObject: function (propertiesToInclude) {
return this._toObjectMethod('toObject', propertiesToInclude);
},
/**
* Returns dataless object representation of canvas
* @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output
* @return {Object} object representation of an instance
*/
toDatalessObject: function (propertiesToInclude) {
return this._toObjectMethod('toDatalessObject', propertiesToInclude);
},
/**
* @private
*/
_toObjectMethod: function (methodName, propertiesToInclude) {
var activeGroup = this.getActiveGroup();
if (activeGroup) {
this.discardActiveGroup();
}
var data = {
objects: this.getObjects().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](propertiesToInclude);
if (!this.includeDefaultValues) {
instance.includeDefaultValues = originalValue;
}
return object;
}, this),
background: (this.backgroundColor && this.backgroundColor.toObject)
? this.backgroundColor.toObject()
: 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;
}
fabric.util.populateWithProperties(this, data, propertiesToInclude);
if (activeGroup) {
this.setActiveGroup(new fabric.Group(activeGroup.getObjects()));
activeGroup.forEachObject(function(o) { o.set('active', true) });
}
return data;
},
/* _TO_SVG_START_ */
/**
* Returns SVG representation of canvas
* @function
* @param {Object} [options] Options object for SVG output
* @param {Boolean} [options.suppressPreamble=false] If true xml tag is not included
* @param {Object} [options.viewBox] SVG viewbox object
* @param {Number} [options.viewBox.x] x-cooridnate of viewbox
* @param {Number} [options.viewBox.y] y-coordinate of viewbox
* @param {Number} [options.viewBox.width] Width of viewbox
* @param {Number} [options.viewBox.height] Height of viewbox
* @param {String} [options.encoding=UTF-8] Encoding of SVG output
* @return {String}
*/
toSVG: function(options) {
options || (options = { });
var markup = [];
if (!options.suppressPreamble) {
markup.push(
'<?xml version="1.0" encoding="', (options.encoding || 'UTF-8'), '" standalone="no" ?>',
'<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" ',
'"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">\n'
);
}
markup.push(
'<svg ',
'xmlns="http://www.w3.org/2000/svg" ',
'xmlns:xlink="http://www.w3.org/1999/xlink" ',
'version="1.1" ',
'width="', (options.viewBox ? options.viewBox.width : this.width), '" ',
'height="', (options.viewBox ? options.viewBox.height : this.height), '" ',
(this.backgroundColor && !this.backgroundColor.source ? 'style="background-color: ' + this.backgroundColor +'" ' : null),
(options.viewBox ? 'viewBox="' + options.viewBox.x + ' ' + options.viewBox.y + ' ' + options.viewBox.width + ' ' + options.viewBox.height + '" ' : null),
'xml:space="preserve">',
'<desc>Created with Fabric.js ', fabric.version, '</desc>',
'<defs>', fabric.createSVGFontFacesMarkup(this.getObjects()), fabric.createSVGRefElementsMarkup(this), '</defs>'
);
if (this.backgroundColor && this.backgroundColor.source) {
markup.push(
'<rect x="0" y="0" ',
'width="', (this.backgroundColor.repeat === 'repeat-y' || this.backgroundColor.repeat === 'no-repeat' ? this.backgroundColor.source.width : this.width),
'" height="', (this.backgroundColor.repeat === 'repeat-x' || this.backgroundColor.repeat === 'no-repeat' ? this.backgroundColor.source.height : this.height),
'" fill="url(#backgroundColorPattern)"',
'></rect>'
);
}
if (this.backgroundImage) {
markup.push(
'<image x="0" y="0" ',
'width="', (this.backgroundImageStretch ? this.width : this.backgroundImage.width),
'" height="', (this.backgroundImageStretch ? this.height : this.backgroundImage.height),
'" preserveAspectRatio="', (this.backgroundImageStretch ? 'none' : 'defer'),
'" xlink:href="', this.backgroundImage.src,
'" style="opacity:', this.backgroundImageOpacity,
'"></image>'
);
}
if (this.overlayImage) {
markup.push(
'<image x="', this.overlayImageLeft,
'" y="', this.overlayImageTop,
'" width="', this.overlayImage.width,
'" height="', this.overlayImage.height,
'" xlink:href="', this.overlayImage.src,
'"></image>'
);
}
var activeGroup = this.getActiveGroup();
if (activeGroup) {
this.discardActiveGroup();
}
for (var i = 0, objects = this.getObjects(), len = objects.length; i < len; i++) {
markup.push(objects[i].toSVG());
}
if (activeGroup) {
this.setActiveGroup(new fabric.Group(activeGroup.getObjects()));
activeGroup.forEachObject(function(o) { o.set('active', true) });
}
markup.push('</svg>');
return markup.join('');
},
/* _TO_SVG_END_ */
/**
* Removes an object from canvas and returns it
* @param {fabric.Object} object Object to remove
* @return {fabric.Object} removed object
*/
remove: function (object) {
// removing active object should fire "selection:cleared" events
if (this.getActiveObject() === object) {
this.fire('before:selection:cleared', { target: object });
this.discardActiveObject();
this.fire('selection:cleared');
}
return fabric.Collection.remove.call(this, object);
},
/**
* Moves an object to the bottom of the stack of drawn objects
* @param {fabric.Object} object Object to send to back
* @return {fabric.Canvas} thisArg
* @chainable
*/
sendToBack: function (object) {
removeFromArray(this._objects, object);
this._objects.unshift(object);
return this.renderAll && this.renderAll();
},
/**
* Moves an object to the top of the stack of drawn objects
* @param {fabric.Object} object Object to send
* @return {fabric.Canvas} thisArg
* @chainable
*/
bringToFront: function (object) {
removeFromArray(this._objects, object);
this._objects.push(object);
return this.renderAll && this.renderAll();
},
/**
* Moves an object down in stack of drawn objects
* @param {fabric.Object} object Object to send
* @param {Boolean} [intersecting] If `true`, send object behind next lower intersecting object
* @return {fabric.Canvas} thisArg
* @chainable
*/
sendBackwards: function (object, intersecting) {
var idx = this._objects.indexOf(object);
// if object is not on the bottom of stack
if (idx !== 0) {
var newIdx;
if (intersecting) {
newIdx = idx;
// 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) {
newIdx = i;
break;
}
}
}
else {
newIdx = idx-1;
}
removeFromArray(this._objects, object);
this._objects.splice(newIdx, 0, object);
this.renderAll && this.renderAll();
}
return this;
},
/**
* Moves an object up in stack of drawn objects
* @param {fabric.Object} object Object to send
* @param {Boolean} [intersecting] If `true`, send object in front of next upper intersecting object
* @return {fabric.Canvas} thisArg
* @chainable
*/
bringForward: function (object, intersecting) {
var idx = this._objects.indexOf(object);
// if object is not on top of stack (last item in an array)
if (idx !== this._objects.length-1) {
var newIdx;
if (intersecting) {
newIdx = idx;
// traverse up the stack looking for the nearest intersecting object
for (var i = idx + 1; i < this._objects.length; ++i) {
var isIntersecting = object.intersectsWithObject(this._objects[i]) ||
object.isContainedWithinObject(this._objects[i]) ||
this._objects[i].isContainedWithinObject(object);
if (isIntersecting) {
newIdx = i;
break;
}
}
}
else {
newIdx = idx+1;
}
removeFromArray(this._objects, object);
this._objects.splice(newIdx, 0, object);
this.renderAll && this.renderAll();
}
return this;
},
/**
* Moves an object to specified level in stack of drawn objects
* @param {fabric.Object} object Object to send
* @param {Number} index Position to move to
* @return {fabric.Canvas} thisArg
* @chainable
*/
moveTo: function (object, index) {
removeFromArray(this._objects, object);
this._objects.splice(index, 0, object);
return this.renderAll && this.renderAll();
},
/**
* Clears a canvas element and removes all event handlers.
* @return {fabric.Canvas} thisArg
* @chainable
*/
dispose: function () {
this.clear();
if (!this.interactive) return this;
if (fabric.isTouchSupported) {
removeListener(this.upperCanvasEl, 'touchstart', this._onMouseDown);
removeListener(this.upperCanvasEl, 'touchmove', this._onMouseMove);
if (typeof Event !== 'undefined' && 'remove' in Event) {
Event.remove(this.upperCanvasEl, 'gesture', this._onGesture);
}
}
else {
removeListener(this.upperCanvasEl, 'mousedown', this._onMouseDown);
removeListener(this.upperCanvasEl, 'mousemove', this._onMouseMove);
removeListener(fabric.window, 'resize', this._onResize);
}
return this;
},
/**
* Returns a string representation of an instance
* @return {String} string representation of an instance
*/
toString: function () {
return '#<fabric.Canvas (' + this.complexity() + '): '+
'{ objects: ' + this.getObjects().length + ' }>';
}
});
extend(fabric.StaticCanvas.prototype, fabric.Observable);
extend(fabric.StaticCanvas.prototype, fabric.Collection);
extend(fabric.StaticCanvas.prototype, fabric.DataURLExporter);
extend(fabric.StaticCanvas, /** @lends fabric.StaticCanvas */ {
/**
* @static
* @type String
* @default
*/
EMPTY_JSON: '{"objects": [], "background": "white"}',
/**
* Takes &lt;canvas> element and transforms its data in such way that it becomes grayscale
* @static
* @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)
*
* @param methodName {String} Method to check support for;
* Could be one of "getImageData", "toDataURL", "toDataURLWithQuality" or "setLineDash"
* @return {Boolean | null} `true` if method is supported (or at least exists),
* `null` if canvas element or context can not be initialized
*/
supports: function (methodName) {
var el = fabric.util.createCanvasElement();
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 'setLineDash':
return typeof ctx.setLineDash !== '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
* @param {Array} propertiesToInclude Any properties that you might want to additionally include in the output
* @return {String} json string
*/
fabric.StaticCanvas.prototype.toJSON = fabric.StaticCanvas.prototype.toObject;
})();
/**
* BaseBrush class
* @class fabric.BaseBrush
*/
fabric.BaseBrush = fabric.util.createClass(/** @lends fabric.BaseBrush.prototype */ {
/**
* Color of a brush
* @type String
* @default
*/
color: 'rgb(0, 0, 0)',
/**
* Width of a brush
* @type Number
* @default
*/
width: 1,
/**
* Shadow object representing shadow of this shape.
* <b>Backwards incompatibility note:</b> This property replaces "shadowColor" (String), "shadowOffsetX" (Number),
* "shadowOffsetY" (Number) and "shadowBlur" (Number) since v1.2.12
* @type fabric.Shadow
* @default
*/
shadow: null,
/**
* Line endings style of a brush (one of "butt", "round", "square")
* @type String
* @default
*/
strokeLineCap: 'round',
/**
* Corner style of a brush (one of "bevil", "round", "miter")
* @type String
* @default
*/
strokeLineJoin: 'round',
/**
* Sets shadow of an object
* @param {Object|String} [options] Options object or string (e.g. "2px 2px 10px rgba(0,0,0,0.2)")
* @return {fabric.Object} thisArg
* @chainable
*/
setShadow: function(options) {
this.shadow = new fabric.Shadow(options);
return this;
},
/**
* Sets brush styles
* @private
*/
_setBrushStyles: function() {
var ctx = this.canvas.contextTop;
ctx.strokeStyle = this.color;
ctx.lineWidth = this.width;
ctx.lineCap = this.strokeLineCap;
ctx.lineJoin = this.strokeLineJoin;
},
/**
* Sets brush shadow styles
* @private
*/
_setShadow: function() {
if (!this.shadow) return;
var ctx = this.canvas.contextTop;
ctx.shadowColor = this.shadow.color;
ctx.shadowBlur = this.shadow.blur;
ctx.shadowOffsetX = this.shadow.offsetX;
ctx.shadowOffsetY = this.shadow.offsetY;
},
/**
* Removes brush shadow styles
* @private
*/
_resetShadow: function() {
var ctx = this.canvas.contextTop;
ctx.shadowColor = '';
ctx.shadowBlur = ctx.shadowOffsetX = ctx.shadowOffsetY = 0;
}
});
(function() {
var utilMin = fabric.util.array.min,
utilMax = fabric.util.array.max;
/**
* PencilBrush class
* @class fabric.PencilBrush
* @extends fabric.BaseBrush
*/
fabric.PencilBrush = fabric.util.createClass(fabric.BaseBrush, /** @lends fabric.PencilBrush.prototype */ {
/**
* Constructor
* @param {fabric.Canvas} canvas
* @return {fabric.PencilBrush} Instance of a pencil brush
*/
initialize: function(canvas) {
this.canvas = canvas;
this._points = [ ];
},
/**
* Inovoked on mouse down
* @param {Object} pointer
*/
onMouseDown: function(pointer) {
this._prepareForDrawing(pointer);
// capture coordinates immediately
// this allows to draw dots (when movement never occurs)
this._captureDrawingPath(pointer);
this._render();
},
/**
* Inovoked on mouse move
* @param {Object} pointer
*/
onMouseMove: function(pointer) {
this._captureDrawingPath(pointer);
// redraw curve
// clear top canvas
this.canvas.clearContext(this.canvas.contextTop);
this._render();
},
/**
* Invoked on mouse up
*/
onMouseUp: function() {
this._finalizeAndAddPath();
},
/**
* @param {Object} pointer
*/
_prepareForDrawing: function(pointer) {
var p = new fabric.Point(pointer.x, pointer.y);
this._reset();
this._addPoint(p);
this.canvas.contextTop.moveTo(p.x, p.y);
},
/**
* @private
* @param {fabric.Point} point
*/
_addPoint: function(point) {
this._points.push(point);
},
/**
* Clear points array and set contextTop canvas
* style.
*
* @private
*
*/
_reset: function() {
this._points.length = 0;
this._setBrushStyles();
this._setShadow();
},
/**
* @private
*
* @param point {pointer} (fabric.util.pointer) actual mouse position
* related to the canvas.
*/
_captureDrawingPath: function(pointer) {
var pointerPoint = new fabric.Point(pointer.x, pointer.y);
this._addPoint(pointerPoint);
},
/**
* Draw a smooth path on the topCanvas using quadraticCurveTo
*
* @private
*/
_render: function() {
var ctx = this.canvas.contextTop;
ctx.beginPath();
var p1 = this._points[0];
var p2 = this._points[1];
//if we only have 2 points in the path and they are the same
//it means that the user only clicked the canvas without moving the mouse
//then we should be drawing a dot. A path isn't drawn between two identical dots
//that's why we set them apart a bit
if (this._points.length === 2 && p1.x === p2.x && p1.y === p2.y) {
p1.x -= 0.5;
p2.x += 0.5;
}
ctx.moveTo(p1.x, p1.y);
for (var i = 1, len = this._points.length; i < len; i++) {
// we pick the point between pi+1 & pi+2 as the
// end point and p1 as our control point.
var midPoint = p1.midPointFrom(p2);
ctx.quadraticCurveTo(p1.x, p1.y, midPoint.x, midPoint.y);
p1 = this._points[i];
p2 = this._points[i+1];
}
// Draw last line as a straight line while
// we wait for the next point to be able to calculate
// the bezier control point
ctx.lineTo(p1.x, p1.y);
ctx.stroke();
},
/**
* Return an SVG path based on our captured points and their bounding box
*
* @private
*/
_getSVGPathData: function() {
this.box = this.getPathBoundingBox(this._points);
return this.convertPointsToSVGPath(
this._points, this.box.minx, this.box.maxx, this.box.miny, this.box.maxy);
},
/**
* Returns bounding box of a path based on given points
* @param {Array} points
* @return {Object} object with minx, miny, maxx, maxy
*/
getPathBoundingBox: function(points) {
var xBounds = [],
yBounds = [],
p1 = points[0],
p2 = points[1],
startPoint = p1;
for (var i = 1, len = points.length; i < len; i++) {
var midPoint = p1.midPointFrom(p2);
// with startPoint, p1 as control point, midpoint as end point
xBounds.push(startPoint.x);
xBounds.push(midPoint.x);
yBounds.push(startPoint.y);
yBounds.push(midPoint.y);
p1 = points[i];
p2 = points[i+1];
startPoint = midPoint;
} // end for
xBounds.push(p1.x);
yBounds.push(p1.y);
return {
minx: utilMin(xBounds),
miny: utilMin(yBounds),
maxx: utilMax(xBounds),
maxy: utilMax(yBounds)
};
},
/**
* Converts points to SVG path
* @param {Array} points Array of points
* @return {String} SVG path
*/
convertPointsToSVGPath: function(points, minX, maxX, minY) {
var path = [];
var p1 = new fabric.Point(points[0].x - minX, points[0].y - minY);
var p2 = new fabric.Point(points[1].x - minX, points[1].y - minY);
path.push('M ', points[0].x - minX, ' ', points[0].y - minY, ' ');
for (var i = 1, len = points.length; i < len; i++) {
var midPoint = p1.midPointFrom(p2);
// p1 is our bezier control point
// midpoint is our endpoint
// start point is p(i-1) value.
path.push('Q ', p1.x, ' ', p1.y, ' ', midPoint.x, ' ', midPoint.y, ' ');
p1 = new fabric.Point(points[i].x - minX, points[i].y - minY);
if ((i+1) < points.length) {
p2 = new fabric.Point(points[i+1].x - minX, points[i+1].y - minY);
}
}
path.push('L ', p1.x, ' ', p1.y, ' ');
return path;
},
/**
* Creates fabric.Path object to add on canvas
* @param {String} pathData Path data
* @return {fabric.Path} path to add on canvas
*/
createPath: function(pathData) {
var path = new fabric.Path(pathData);
path.fill = null;
path.stroke = this.color;
path.strokeWidth = this.width;
path.strokeLineCap = this.strokeLineCap;
path.strokeLineJoin = this.strokeLineJoin;
if (this.shadow) {
this.shadow.affectStroke = true;
path.setShadow(this.shadow);
}
return path;
},
/**
* On mouseup after drawing the path on contextTop canvas
* we use the points captured to create an new fabric path object
* and add it to the fabric canvas.
*
*/
_finalizeAndAddPath: function() {
var ctx = this.canvas.contextTop;
ctx.closePath();
var pathData = this._getSVGPathData().join('');
if (pathData === "M 0 0 Q 0 0 0 0 L 0 0") {
// do not create 0 width/height paths, as they are
// rendered inconsistently across browsers
// Firefox 4, for example, renders a dot,
// whereas Chrome 10 renders nothing
this.canvas.renderAll();
return;
}
// set path origin coordinates based on our bounding box
var originLeft = this.box.minx + (this.box.maxx - this.box.minx) /2;
var originTop = this.box.miny + (this.box.maxy - this.box.miny) /2;
this.canvas.contextTop.arc(originLeft, originTop, 3, 0, Math.PI * 2, false);
var path = this.createPath(pathData);
path.set({ left: originLeft, top: originTop });
this.canvas.add(path);
path.setCoords();
this.canvas.clearContext(this.canvas.contextTop);
this._resetShadow();
this.canvas.renderAll();
// fire event 'path' created
this.canvas.fire('path:created', { path: path });
}
});
})();
/**
* CircleBrush class
* @class fabric.CircleBrush
*/
fabric.CircleBrush = fabric.util.createClass(fabric.BaseBrush, /** @lends fabric.CircleBrush.prototype */ {
/**
* Width of a brush
* @type Number
* @default
*/
width: 10,
/**
* Constructor
* @param {fabric.Canvas} canvas
* @return {fabric.CircleBrush} Instance of a circle brush
*/
initialize: function(canvas) {
this.canvas = canvas;
this.points = [ ];
},
/**
* Invoked inside on mouse down and mouse move
* @param {Object} pointer
*/
drawDot: function(pointer) {
var point = this.addPoint(pointer);
var ctx = this.canvas.contextTop;
ctx.fillStyle = point.fill;
ctx.beginPath();
ctx.arc(point.x, point.y, point.radius, 0, Math.PI * 2, false);
ctx.closePath();
ctx.fill();
},
/**
* Invoked on mouse down
*/
onMouseDown: function(pointer) {
this.points.length = 0;
this.canvas.clearContext(this.canvas.contextTop);
this._setShadow();
this.drawDot(pointer);
},
/**
* Invoked on mouse move
* @param {Object} pointer
*/
onMouseMove: function(pointer) {
this.drawDot(pointer);
},
/**
* Invoked on mouse up
*/
onMouseUp: function() {
var originalRenderOnAddRemove = this.canvas.renderOnAddRemove;
this.canvas.renderOnAddRemove = false;
var circles = [ ];
for (var i = 0, len = this.points.length; i < len; i++) {
var point = this.points[i];
var circle = new fabric.Circle({
radius: point.radius,
left: point.x,
top: point.y,
fill: point.fill
});
this.shadow && circle.setShadow(this.shadow);
circles.push(circle);
}
var group = new fabric.Group(circles);
this.canvas.add(group);
this.canvas.fire('path:created', { path: group });
this.canvas.clearContext(this.canvas.contextTop);
this._resetShadow();
this.canvas.renderOnAddRemove = originalRenderOnAddRemove;
this.canvas.renderAll();
},
/**
* @param {Object} pointer
* @return {fabric.Point} Just added pointer point
*/
addPoint: function(pointer) {
var pointerPoint = new fabric.Point(pointer.x, pointer.y);
var circleRadius = fabric.util.getRandomInt(
Math.max(0, this.width - 20), this.width + 20) / 2;
var circleColor = new fabric.Color(this.color)
.setAlpha(fabric.util.getRandomInt(0, 100) / 100)
.toRgba();
pointerPoint.radius = circleRadius;
pointerPoint.fill = circleColor;
this.points.push(pointerPoint);
return pointerPoint;
}
});
/**
* SprayBrush class
* @class fabric.SprayBrush
*/
fabric.SprayBrush = fabric.util.createClass( fabric.BaseBrush, /** @lends fabric.SprayBrush.prototype */ {
/**
* Width of a spray
* @type Number
* @default
*/
width: 10,
/**
* Density of a spray (number of dots per chunk)
* @type Number
* @default
*/
density: 20,
/**
* Width of spray dots
* @type Number
* @default
*/
dotWidth: 1,
/**
* Width variance of spray dots
* @type Number
* @default
*/
dotWidthVariance: 1,
/**
* Whether opacity of a dot should be random
* @type Boolean
* @default
*/
randomOpacity: false,
/**
* Constructor
* @param {fabric.Canvas} canvas
* @return {fabric.SprayBrush} Instance of a spray brush
*/
initialize: function(canvas) {
this.canvas = canvas;
this.sprayChunks = [ ];
},
/**
* Invoked on mouse down
* @param {Object} pointer
*/
onMouseDown: function(pointer) {
this.sprayChunks.length = 0;
this.canvas.clearContext(this.canvas.contextTop);
this._setShadow();
this.addSprayChunk(pointer);
this.render();
},
/**
* Invoked on mouse move
* @param {Object} pointer
*/
onMouseMove: function(pointer) {
this.addSprayChunk(pointer);
this.render();
},
/**
* Invoked on mouse up
*/
onMouseUp: function() {
var originalRenderOnAddRemove = this.canvas.renderOnAddRemove;
this.canvas.renderOnAddRemove = false;
var rects = [ ];
for (var i = 0, ilen = this.sprayChunks.length; i < ilen; i++) {
var sprayChunk = this.sprayChunks[i];
for (var j = 0, jlen = sprayChunk.length; j < jlen; j++) {
var rect = new fabric.Rect({
width: sprayChunk[j].width,
height: sprayChunk[j].width,
left: sprayChunk[j].x + 1,
top: sprayChunk[j].y + 1,
fill: this.color
});
this.shadow && rect.setShadow(this.shadow);
rects.push(rect);
}
}
var group = new fabric.Group(rects);
this.canvas.add(group);
this.canvas.fire('path:created', { path: group });
this.canvas.clearContext(this.canvas.contextTop);
this._resetShadow();
this.canvas.renderOnAddRemove = originalRenderOnAddRemove;
this.canvas.renderAll();
},
/**
* Renders brush
*/
render: function() {
var ctx = this.canvas.contextTop;
ctx.fillStyle = this.color;
ctx.save();
for (var i = 0, len = this.sprayChunkPoints.length; i < len; i++) {
var point = this.sprayChunkPoints[i];
if (typeof point.opacity !== 'undefined') {
ctx.globalAlpha = point.opacity;
}
ctx.fillRect(point.x, point.y, point.width, point.width);
}
ctx.restore();
},
/**
* @param {Object} pointer
*/
addSprayChunk: function(pointer) {
this.sprayChunkPoints = [ ];
var x, y, width, radius = this.width / 2;
for (var i = 0; i < this.density; i++) {
x = fabric.util.getRandomInt(pointer.x - radius, pointer.x + radius);
y = fabric.util.getRandomInt(pointer.y - radius, pointer.y + radius);
if (this.dotWidthVariance) {
width = fabric.util.getRandomInt(
// bottom clamp width to 1
Math.max(1, this.dotWidth - this.dotWidthVariance),
this.dotWidth + this.dotWidthVariance);
}
else {
width = this.dotWidth;
}
var point = { x: x, y: y, width: width };
if (this.randomOpacity) {
point.opacity = fabric.util.getRandomInt(0, 100) / 100;
}
this.sprayChunkPoints.push(point);
}
this.sprayChunks.push(this.sprayChunkPoints);
}
});
/**
* PatternBrush class
* @class fabric.PatternBrush
* @extends fabric.BaseBrush
*/
fabric.PatternBrush = fabric.util.createClass(fabric.PencilBrush, /** @lends fabric.PatternBrush.prototype */ {
getPatternSrc: function() {
var dotWidth = 20,
dotDistance = 5,
patternCanvas = fabric.document.createElement('canvas'),
patternCtx = patternCanvas.getContext('2d');
patternCanvas.width = patternCanvas.height = dotWidth + dotDistance;
patternCtx.fillStyle = this.color;
patternCtx.beginPath();
patternCtx.arc(dotWidth / 2, dotWidth / 2, dotWidth / 2, 0, Math.PI * 2, false);
patternCtx.closePath();
patternCtx.fill();
return patternCanvas;
},
getPatternSrcFunction: function() {
return String(this.getPatternSrc).replace('this.color', '"' + this.color + '"');
},
/**
* Creates "pattern" instance property
*/
getPattern: function() {
return this.canvas.contextTop.createPattern(this.source || this.getPatternSrc(), 'repeat');
},
/**
* Sets brush styles
*/
_setBrushStyles: function() {
this.callSuper('_setBrushStyles');
this.canvas.contextTop.strokeStyle = this.getPattern();
},
/**
* Creates path
*/
createPath: function(pathData) {
var path = this.callSuper('createPath', pathData);
path.stroke = new fabric.Pattern({
source: this.source || this.getPatternSrcFunction()
});
return path;
}
});
(function() {
var getPointer = fabric.util.getPointer,
degreesToRadians = fabric.util.degreesToRadians,
radiansToDegrees = fabric.util.radiansToDegrees,
atan2 = Math.atan2,
abs = Math.abs,
min = Math.min,
max = Math.max,
STROKE_OFFSET = 0.5;
/**
* Canvas class
* @class fabric.Canvas
* @extends fabric.StaticCanvas
*/
fabric.Canvas = fabric.util.createClass(fabric.StaticCanvas, /** @lends fabric.Canvas.prototype */ {
/**
* Constructor
* @param {HTMLElement | String} el &lt;canvas> element to initialize instance on
* @param {Object} [options] Options object
* @return {Object} thisArg
*/
initialize: function(el, options) {
options || (options = { });
this._initStatic(el, options);
this._initInteractive();
this._createCacheCanvas();
fabric.Canvas.activeInstance = this;
},
/**
* When true, objects can be transformed by one side (unproportionally)
* @type Boolean
* @default
*/
uniScaleTransform: false,
/**
* When true, objects use center point as the origin of transformation
* @type Boolean
* @default
*/
centerTransform: false,
/**
* Indicates that canvas is interactive. This property should not be changed.
* @type Boolean
* @default
*/
interactive: true,
/**
* Indicates whether group selection should be enabled
* @type Boolean
* @default
*/
selection: true,
/**
* Color of selection
* @type String
* @default
*/
selectionColor: 'rgba(100, 100, 255, 0.3)', // blue
/**
* Default dash array pattern
* If not empty the selection border is dashed
* @type Array
*/
selectionDashArray: [ ],
/**
* Color of the border of selection (usually slightly darker than color of selection itself)
* @type String
* @default
*/
selectionBorderColor: 'rgba(255, 255, 255, 0.3)',
/**
* Width of a line used in object/group selection
* @type Number
* @default
*/
selectionLineWidth: 1,
/**
* Default cursor value used when hovering over an object on canvas
* @type String
* @default
*/
hoverCursor: 'move',
/**
* Default cursor value used when moving an object on canvas
* @type String
* @default
*/
moveCursor: 'move',
/**
* Default cursor value used for the entire canvas
* @type String
* @default
*/
defaultCursor: 'default',
/**
* Cursor value used during free drawing
* @type String
* @default
*/
freeDrawingCursor: 'crosshair',
/**
* Cursor value used for rotation point
* @type String
* @default
*/
rotationCursor: 'crosshair',
/**
* Default element class that's given to wrapper (div) element of canvas
* @type String
* @default
*/
containerClass: 'canvas-container',
/**
* When true, object detection happens on per-pixel basis rather than on per-bounding-box
* @type Boolean
* @default
*/
perPixelTargetFind: false,
/**
* Number of pixels around target pixel to tolerate (consider active) during object detection
* @type Number
* @default
*/
targetFindTolerance: 0,
/**
* When true, target detection is skipped when hovering over canvas. This can be used to improve performance.
* @type Boolean
* @default
*/
skipTargetFind: false,
/**
* @private
*/
_initInteractive: function() {
this._currentTransform = null;
this._groupSelector = null;
this._initWrapperElement();
this._createUpperCanvas();
this._initEvents();
this.freeDrawingBrush = fabric.PencilBrush && new fabric.PencilBrush(this);
this.calcOffset();
},
/**
* Resets the current transform to its original values and chooses the type of resizing based on the event
* @private
* @param {Event} e Event object fired on mousemove
*/
_resetCurrentTransform: function(e) {
var t = this._currentTransform;
t.target.set('scaleX', t.original.scaleX);
t.target.set('scaleY', t.original.scaleY);
t.target.set('left', t.original.left);
t.target.set('top', t.original.top);
if (e.altKey || this.centerTransform || t.target.centerTransform) {
if (t.originX !== 'center') {
if (t.originX === 'right') {
t.mouseXSign = -1;
}
else {
t.mouseXSign = 1;
}
}
if (t.originY !== 'center') {
if (t.originY === 'bottom') {
t.mouseYSign = -1;
}
else {
t.mouseYSign = 1;
}
}
t.originX = 'center';
t.originY = 'center';
}
else {
t.originX = t.original.originX;
t.originY = t.original.originY;
}
},
/**
* Checks if point is contained within an area of given object
* @param {Event} e Event object
* @param {fabric.Object} target Object to test against
* @return {Boolean} true if point is contained within an area of given object
*/
containsPoint: function (e, target) {
var pointer = this.getPointer(e),
xy = this._normalizePointer(target, pointer);
// http://www.geog.ubc.ca/courses/klink/gis.notes/ncgia/u32.html
// http://idav.ucdavis.edu/~okreylos/TAship/Spring2000/PointInPolygon.html
return (target.containsPoint(xy) || target._findTargetCorner(e, this._offset));
},
/**
* @private
*/
_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 };
},
/**
* Returns true if object is transparent at a certain location
* @param {fabric.Object} target Object to check
* @param {Number} x Left coordinate
* @param {Number} y Top coordinate
* @return {Boolean}
*/
isTargetTransparent: function (target, x, y) {
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, l = imageData.data.length; i < l; 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
* @param {Event} e
* @param {fabric.Object} target
*/
_shouldClearSelection: function (e, target) {
var activeGroup = this.getActiveGroup();
return (
!target || (
target &&
activeGroup &&
!activeGroup.contains(target) &&
activeGroup !== target &&
!e.shiftKey) || (
target &&
!target.selectable)
);
},
/**
* @private
* @param {Event} e
* @param {fabric.Object} target
*/
_setupCurrentTransform: function (e, target) {
if (!target) return;
var action = 'drag',
corner,
pointer = getPointer(e, target.canvas.upperCanvasEl);
corner = target._findTargetCorner(e, this._offset);
if (corner) {
action = (corner === 'ml' || corner === 'mr')
? 'scaleX'
: (corner === 'mt' || corner === 'mb')
? 'scaleY'
: corner === 'mtr'
? 'rotate'
: 'scale';
}
var originX = target.originX, originY = target.originY;
if (corner === 'ml' || corner === 'tl' || corner === 'bl') {
originX = "right";
}
else if (corner === 'mr' || corner === 'tr' || corner === 'br') {
originX = "left";
}
if (corner === 'tl' || corner === 'mt' || corner === 'tr') {
originY = "bottom";
}
else if (corner === 'bl' || corner === 'mb' || corner === 'br') {
originY = "top";
}
// if (corner === 'mtr') {
// originX = 'center';
// originY = 'center';
// }
// var center = target.getCenterPoint();
this._currentTransform = {
target: target,
action: action,
scaleX: target.scaleX,
scaleY: target.scaleY,
offsetX: pointer.x - target.left,
offsetY: pointer.y - target.top,
originX: originX,
originY: originY,
ex: pointer.x,
ey: pointer.y,
left: target.left,
top: target.top,
theta: degreesToRadians(target.angle),
width: target.width * target.scaleX,
mouseXSign: 1,
mouseYSign: 1
};
this._currentTransform.original = {
left: target.left,
top: target.top,
scaleX: target.scaleX,
scaleY: target.scaleY,
originX: originX,
originY: originY
};
this._resetCurrentTransform(e);
},
/**
* @private
* @param {Event} e
* @param {fabric.Object} target
* @return {Boolean}
*/
_shouldHandleGroupLogic: function(e, target) {
var activeObject = this.getActiveObject();
return e.shiftKey &&
(this.getActiveGroup() || (activeObject && activeObject !== target))
&& this.selection;
},
/**
* @private
* @param {Event} e
* @param {fabric.Object} target
*/
_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.set('active', 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.set('active', 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 objects = this.getObjects();
var isActiveLower = objects.indexOf(this._activeObject) < objects.indexOf(target);
var group = new fabric.Group(
isActiveLower ? [ target, this._activeObject ] : [ this._activeObject, target ]);
this.setActiveGroup(group);
this._activeObject = null;
activeGroup = this.getActiveGroup();
this.fire('selection:created', { target: activeGroup, e: e });
}
}
// activate target object in any case
target.set('active', true);
}
if (activeGroup) {
activeGroup.saveCoords();
}
},
/**
* Translates object by "setting" its left/top
* @private
* @param x {Number} pointer's x coordinate
* @param y {Number} pointer's y coordinate
*/
_translateObject: function (x, y) {
var target = this._currentTransform.target;
if (!target.get('lockMovementX')) {
target.set('left', x - this._currentTransform.offsetX);
}
if (!target.get('lockMovementY')) {
target.set('top', y - this._currentTransform.offsetY);
}
},
/**
* Scales object by invoking its scaleX/scaleY methods
* @private
* @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;
var lockScalingX = target.get('lockScalingX'),
lockScalingY = target.get('lockScalingY');
if (lockScalingX && lockScalingY) return;
// Get the constraint point
var constraintPosition = target.translateToOriginPoint(target.getCenterPoint(), t.originX, t.originY);
var localMouse = target.toLocalPoint(new fabric.Point(x - offset.left, y - offset.top), t.originX, t.originY);
if (t.originX === 'right') {
localMouse.x *= -1;
}
else if (t.originX === 'center') {
localMouse.x *= t.mouseXSign * 2;
if (localMouse.x < 0) {
t.mouseXSign = -t.mouseXSign;
}
}
if (t.originY === 'bottom') {
localMouse.y *= -1;
}
else if (t.originY === 'center') {
localMouse.y *= t.mouseYSign * 2;
if (localMouse.y < 0) {
t.mouseYSign = -t.mouseYSign;
}
}
// adjust the mouse coordinates when dealing with padding
if (abs(localMouse.x) > target.padding) {
if (localMouse.x < 0 ) {
localMouse.x += target.padding;
} else {
localMouse.x -= target.padding;
}
} else { // mouse is within the padding, set to 0
localMouse.x = 0;
}
if (abs(localMouse.y) > target.padding) {
if (localMouse.y < 0 ) {
localMouse.y += target.padding;
} else {
localMouse.y -= target.padding;
}
} else {
localMouse.y = 0;
}
// Actually scale the object
var newScaleX = target.scaleX, newScaleY = target.scaleY;
if (by === 'equally' && !lockScalingX && !lockScalingY) {
var dist = localMouse.y + localMouse.x;
var lastDist = (target.height + (target.strokeWidth)) * t.original.scaleY +
(target.width + (target.strokeWidth)) * t.original.scaleX;
// We use t.scaleX/Y instead of target.scaleX/Y because the object may have a min scale and we'll loose the proportions
newScaleX = t.original.scaleX * dist/lastDist;
newScaleY = t.original.scaleY * dist/lastDist;
target.set('scaleX', newScaleX);
target.set('scaleY', newScaleY);
}
else if (!by) {
newScaleX = localMouse.x/(target.width+target.strokeWidth);
newScaleY = localMouse.y/(target.height+target.strokeWidth);
lockScalingX || target.set('scaleX', newScaleX);
lockScalingY || target.set('scaleY', newScaleY);
}
else if (by === 'x' && !target.get('lockUniScaling')) {
newScaleX = localMouse.x/(target.width + target.strokeWidth);
lockScalingX || target.set('scaleX', newScaleX);
}
else if (by === 'y' && !target.get('lockUniScaling')) {
newScaleY = localMouse.y/(target.height + target.strokeWidth);
lockScalingY || target.set('scaleY', newScaleY);
}
// Check if we flipped
if (newScaleX < 0)
{
if (t.originX === 'left')
t.originX = 'right';
else if (t.originX === 'right')
t.originX = 'left';
}
if (newScaleY < 0)
{
if (t.originY === 'top')
t.originY = 'bottom';
else if (t.originY === 'bottom')
t.originY = 'top';
}
// Make sure the constraints apply
target.setPositionByOrigin(constraintPosition, t.originX, t.originY);
},
/**
* Rotates object by invoking its rotate method
* @private
* @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.get('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),
angle = radiansToDegrees(curAngle - lastAngle + t.theta);
// normalize angle to positive value
if (angle < 0) {
angle = 360 + angle;
}
t.target.angle = angle;
},
/**
* @private
*/
_setCursor: function (value) {
this.upperCanvasEl.style.cursor = value;
},
/**
* @private
*/
_resetObjectTransform: function (target) {
target.scaleX = 1;
target.scaleY = 1;
target.setAngle(0);
},
/**
* @private
*/
_drawSelection: function () {
var ctx = this.contextTop,
groupSelector = this._groupSelector,
left = groupSelector.left,
top = groupSelector.top,
aleft = abs(left),
atop = abs(top);
ctx.fillStyle = this.selectionColor;
ctx.fillRect(
groupSelector.ex - ((left > 0) ? 0 : -left),
groupSelector.ey - ((top > 0) ? 0 : -top),
aleft,
atop
);
ctx.lineWidth = this.selectionLineWidth;
ctx.strokeStyle = this.selectionBorderColor;
// selection border
if (this.selectionDashArray.length > 1) {
var px = groupSelector.ex + STROKE_OFFSET - ((left > 0) ? 0: aleft);
var py = groupSelector.ey + STROKE_OFFSET - ((top > 0) ? 0: atop);
ctx.beginPath();
fabric.util.drawDashedLine(ctx, px, py, px+aleft, py, this.selectionDashArray);
fabric.util.drawDashedLine(ctx, px, py+atop-1, px+aleft, py+atop-1, this.selectionDashArray);
fabric.util.drawDashedLine(ctx, px, py, px, py+atop, this.selectionDashArray);
fabric.util.drawDashedLine(ctx, px+aleft-1, py, px+aleft-1, py+atop, this.selectionDashArray);
ctx.closePath();
ctx.stroke();
}
else {
ctx.strokeRect(
groupSelector.ex + STROKE_OFFSET - ((left > 0) ? 0 : aleft),
groupSelector.ey + STROKE_OFFSET - ((top > 0) ? 0 : atop),
aleft,
atop
);
}
},
/**
* @private
*/
_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)),
isClick = x1 === x2 && y1 === y2;
for (var i = this._objects.length; i--; ) {
currentObject = this._objects[i];
if (!currentObject) continue;
if (currentObject.intersectsWithRect(selectionX1Y1, selectionX2Y2) ||
currentObject.isContainedWithinRect(selectionX1Y1, selectionX2Y2) ||
currentObject.containsPoint(selectionX1Y1) ||
currentObject.containsPoint(selectionX2Y2)) {
if (this.selection && currentObject.selectable) {
currentObject.set('active', true);
group.push(currentObject);
// only add one object if it's a click
if (isClick) break;
}
}
}
// 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.reverse());
this.setActiveGroup(group);
group.saveCoords();
this.fire('selection:created', { target: group });
this.renderAll();
}
},
/**
* Method that determines what object we are clicking on
* @param {Event} e mouse event
* @param {Boolean} skipGroup when true, group is skipped and only objects are traversed through
*/
findTarget: function (e, skipGroup) {
if (this.skipTargetFind) return;
var target,
pointer = this.getPointer(e);
if (this.controlsAboveOverlay &&
this.lastRenderedObjectWithControlsAboveOverlay &&
this.lastRenderedObjectWithControlsAboveOverlay.visible &&
this.containsPoint(e, this.lastRenderedObjectWithControlsAboveOverlay) &&
this.lastRenderedObjectWithControlsAboveOverlay._findTargetCorner(e, this._offset)) {
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._objects[i].visible &&
this._objects[i].selectable &&
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;
}
}
return target;
},
/**
* Returns pointer coordinates relative to canvas.
* @param {Event} e
* @return {Object} object with "x" and "y" number values
*/
getPointer: function (e) {
var pointer = getPointer(e, this.upperCanvasEl);
return {
x: pointer.x - this._offset.left,
y: pointer.y - this._offset.top
};
},
/**
* @private
* @param {HTMLElement|String} canvasEl Canvas element
* @throws {CANVAS_INIT_ERROR} If canvas can not be initialized
*/
_createUpperCanvas: function () {
var lowerCanvasClass = this.lowerCanvasEl.className.replace(/\s*lower-canvas\s*/, '');
this.upperCanvasEl = this._createCanvasElement();
fabric.util.addClass(this.upperCanvasEl, 'upper-canvas ' + lowerCanvasClass);
this.wrapperEl.appendChild(this.upperCanvasEl);
this._copyCanvasStyle(this.lowerCanvasEl, this.upperCanvasEl);
this._applyCanvasStyle(this.upperCanvasEl);
this.contextTop = this.upperCanvasEl.getContext('2d');
},
/**
* @private
*/
_createCacheCanvas: function () {
this.cacheCanvasEl = this._createCanvasElement();
this.cacheCanvasEl.setAttribute('width', this.width);
this.cacheCanvasEl.setAttribute('height', this.height);
this.contextCache = this.cacheCanvasEl.getContext('2d');
},
/**
* @private
* @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
* @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);
},
/**
* Copys the the entire inline style from one element (fromEl) to another (toEl)
* @private
* @param {Element} fromEl Element style is copied from
* @param {Element} toEl Element copied style is applied to
*/
_copyCanvasStyle: function (fromEl, toEl) {
toEl.style.cssText = fromEl.style.cssText;
},
/**
* Returns context of canvas where object selection is drawn
* @return {CanvasRenderingContext2D}
*/
getSelectionContext: function() {
return this.contextTop;
},
/**
* Returns &lt;canvas> element on which object selection is drawn
* @return {HTMLCanvasElement}
*/
getSelectionElement: function () {
return this.upperCanvasEl;
},
/**
* Sets given object as the only active object on canvas
* @param {fabric.Object} object Object to set as an active one
* @param {Event} [e] Event (passed along when firing "object:selected")
* @return {fabric.Canvas} thisArg
* @chainable
*/
setActiveObject: function (object, e) {
if (this._activeObject) {
this._activeObject.set('active', false);
}
this._activeObject = object;
object.set('active', true);
this.renderAll();
this.fire('object:selected', { target: object, e: e });
object.fire('selected', { e: e });
return this;
},
/**
* Returns currently active object
* @return {fabric.Object} active object
*/
getActiveObject: function () {
return this._activeObject;
},
/**
* Discards currently active object
* @return {fabric.Canvas} thisArg
* @chainable
*/
discardActiveObject: function () {
if (this._activeObject) {
this._activeObject.set('active', false);
}
this._activeObject = null;
return this;
},
/**
* Sets active group to a speicified one
* @param {fabric.Group} group Group to set as a current one
* @return {fabric.Canvas} thisArg
* @chainable
*/
setActiveGroup: function (group) {
this._activeGroup = group;
if (group) {
group.canvas = this;
group.set('active', true);
}
return this;
},
/**
* Returns currently active group
* @return {fabric.Group} Current group
*/
getActiveGroup: function () {
return this._activeGroup;
},
/**
* Removes currently active group
* @return {fabric.Canvas} thisArg
*/
discardActiveGroup: function () {
var g = this.getActiveGroup();
if (g) {
g.destroy();
}
return this.setActiveGroup(null);
},
/**
* Deactivates all objects on canvas, removing any active group or object
* @return {fabric.Canvas} thisArg
*/
deactivateAll: function () {
var allObjects = this.getObjects(),
i = 0,
len = allObjects.length;
for ( ; i < len; i++) {
allObjects[i].set('active', false);
}
this.discardActiveGroup();
this.discardActiveObject();
return this;
},
/**
* Deactivates all objects and dispatches appropriate events
* @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;
},
/**
* Draws objects' controls (borders/controls)
* @param {CanvasRenderingContext2D} 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).drawControls(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).drawControls(ctx);
ctx.restore();
this.lastRenderedObjectWithControlsAboveOverlay = this._objects[i];
}
}
}
});
// copying static properties manually to work around Opera's bug,
// where "prototype" property is enumerable and overrides existing prototype
for (var prop in fabric.StaticCanvas) {
if (prop !== 'prototype') {
fabric.Canvas[prop] = fabric.StaticCanvas[prop];
}
}
if (fabric.isTouchSupported) {
/** @ignore */
fabric.Canvas.prototype._setCursorFromEvent = function() { };
}
/**
* @class fabric.Element
* @alias fabric.Canvas
* @deprecated Use {@link fabric.Canvas} instead.
* @constructor
*/
fabric.Element = fabric.Canvas;
})();
(function(){
var cursorMap = [
'n-resize',
'ne-resize',
'e-resize',
'se-resize',
's-resize',
'sw-resize',
'w-resize',
'nw-resize'
],
cursorOffset = {
'mt': 0, // n
'tr': 1, // ne
'mr': 2, // e
'br': 3, // se
'mb': 4, // s
'bl': 5, // sw
'ml': 6, // w
'tl': 7 // nw
},
addListener = fabric.util.addListener,
removeListener = fabric.util.removeListener,
getPointer = fabric.util.getPointer;
fabric.util.object.extend(fabric.Canvas.prototype, /** @lends fabric.Canvas.prototype */ {
/**
* Adds mouse listeners to canvas
* @private
*/
_initEvents: function () {
var _this = this;
this._onMouseDown = this._onMouseDown.bind(this);
this._onMouseMove = this._onMouseMove.bind(this);
this._onMouseUp = this._onMouseUp.bind(this);
this._onResize = this._onResize.bind(this);
this._onGesture = function(e, s) {
_this.__onTransformGesture(e, s);
};
addListener(fabric.window, 'resize', this._onResize);
if (fabric.isTouchSupported) {
addListener(this.upperCanvasEl, 'touchstart', this._onMouseDown);
addListener(this.upperCanvasEl, 'touchmove', this._onMouseMove);
if (typeof Event !== 'undefined' && 'add' in Event) {
Event.add(this.upperCanvasEl, 'gesture', this._onGesture);
}
}
else {
addListener(this.upperCanvasEl, 'mousedown', this._onMouseDown);
addListener(this.upperCanvasEl, 'mousemove', this._onMouseMove);
}
},
/**
* @private
* @param {Event} e Event object fired on mousedown
*/
_onMouseDown: function (e) {
this.__onMouseDown(e);
!fabric.isTouchSupported && addListener(fabric.document, 'mouseup', this._onMouseUp);
fabric.isTouchSupported && addListener(fabric.document, 'touchend', this._onMouseUp);
!fabric.isTouchSupported && addListener(fabric.document, 'mousemove', this._onMouseMove);
fabric.isTouchSupported && addListener(fabric.document, 'touchmove', this._onMouseMove);
!fabric.isTouchSupported && removeListener(this.upperCanvasEl, 'mousemove', this._onMouseMove);
fabric.isTouchSupported && removeListener(this.upperCanvasEl, 'touchmove', this._onMouseMove);
},
/**
* @private
* @param {Event} e Event object fired on mouseup
*/
_onMouseUp: function (e) {
this.__onMouseUp(e);
!fabric.isTouchSupported && removeListener(fabric.document, 'mouseup', this._onMouseUp);
fabric.isTouchSupported && removeListener(fabric.document, 'touchend', this._onMouseUp);
!fabric.isTouchSupported && removeListener(fabric.document, 'mousemove', this._onMouseMove);
fabric.isTouchSupported && removeListener(fabric.document, 'touchmove', this._onMouseMove);
!fabric.isTouchSupported && addListener(this.upperCanvasEl, 'mousemove', this._onMouseMove);
fabric.isTouchSupported && addListener(this.upperCanvasEl, 'touchmove', this._onMouseMove);
},
/**
* @private
* @param {Event} e Event object fired on mousemove
*/
_onMouseMove: function (e) {
!this.allowTouchScrolling && e.preventDefault && e.preventDefault();
this.__onMouseMove(e);
},
/**
* @private
*/
_onResize: function () {
this.calcOffset();
},
/**
* Decides whether the canvas should be redrawn in mouseup and mousedown events.
* @private
* @param {Object} target
* @param {Object} pointer
*/
_shouldRender: function(target, pointer) {
var activeObject = this.getActiveGroup() || this.getActiveObject();
return (
(target && (
target.isMoving ||
target !== activeObject)) ||
(!target && activeObject) ||
(pointer &&
this._previousPointer &&
this.selection && (
pointer.x !== this._previousPointer.x ||
pointer.y !== this._previousPointer.y))
);
},
/**
* Method that defines the actions when mouse is released on canvas.
* The method resets the currentTransform parameters, store the image corner
* position in the image object and render the canvas on top.
* @private
* @param {Event} e Event object fired on mouseup
*/
__onMouseUp: function (e) {
var target,
pointer,
render;
if (this.isDrawingMode && this._isCurrentlyDrawing) {
this._isCurrentlyDrawing = false;
if (this.clipTo) {
this.contextTop.restore();
}
this.freeDrawingBrush.onMouseUp();
this.fire('mouse:up', { e: e });
return;
}
if (this._currentTransform) {
var transform = this._currentTransform;
target = transform.target;
if (target._scaling) {
target._scaling = false;
}
target.setCoords();
// only fire :modified event if target coordinates were changed during mousedown-mouseup
if (this.stateful && target.hasStateChanged()) {
this.fire('object:modified', { target: target });
target.fire('modified');
}
if (this._previousOriginX && this._previousOriginY) {
var originPoint = target.translateToOriginPoint(
target.getCenterPoint(),
this._previousOriginX,
this._previousOriginY);
target.originX = this._previousOriginX;
target.originY = this._previousOriginY;
target.left = originPoint.x;
target.top = originPoint.y;
this._previousOriginX = null;
this._previousOriginY = null;
}
}
else {
pointer = this.getPointer(e);
}
render = this._shouldRender(target, pointer);
if (this.selection && this._groupSelector) {
// group selection was completed, determine its bounds
this._findSelectedObjects(e);
}
var activeGroup = this.getActiveGroup();
if (activeGroup) {
activeGroup.setObjectsCoords();
activeGroup.isMoving = false;
this._setCursor(this.defaultCursor);
}
// clear selection and current transformation
this._groupSelector = null;
this._currentTransform = null;
if (target) {
target.isMoving = false;
}
render && this.renderAll();
this._setCursorFromEvent(e, target);
var _this = this;
setTimeout(function () {
_this._setCursorFromEvent(e, target);
}, 50);
this.fire('mouse:up', { target: target, e: e });
target && target.fire('mouseup', { e: e });
},
/**
* @private
* @param {Event} e Event object fired on mousedown
*/
_onMouseDownInDrawingMode: function(e) {
this._isCurrentlyDrawing = true;
this.discardActiveObject().renderAll();
if (this.clipTo) {
fabric.util.clipContext(this, this.contextTop);
}
this.freeDrawingBrush.onMouseDown(this.getPointer(e));
this.fire('mouse:down', { 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.
* @private
* @param {Event} e 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._onMouseDownInDrawingMode(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),
corner,
render;
// save pointer for check in __onMouseUp event
this._previousPointer = pointer;
render = this._shouldRender(target, pointer);
if (this._shouldClearSelection(e, target)) {
if (this.selection) {
this._groupSelector = {
ex: pointer.x,
ey: pointer.y,
top: 0,
left: 0
};
}
this.deactivateAllWithDispatch();
target && target.selectable && this.setActiveObject(target, e);
}
else if (this._shouldHandleGroupLogic(e, target)) {
this._handleGroupLogic(e, target);
target = this.getActiveGroup();
}
else {
// determine if it's a drag or rotate case
this.stateful && target.saveState();
if ((corner = target._findTargetCorner(e, this._offset))) {
this.onBeforeScaleRotate(target);
}
if (target !== this.getActiveGroup() && target !== this.getActiveObject()) {
this.deactivateAll();
this.setActiveObject(target, e);
}
this._setupCurrentTransform(e, target);
}
// we must renderAll so that active image is placed on the top canvas
render && this.renderAll();
this.fire('mouse:down', { target: target, e: e });
target && target.fire('mousedown', { e: e });
if (corner === 'mtr' && target.centerTransform) {
this._setOriginToCenter(target);
}
},
/**
* @private
*/
_setOriginToCenter: function(target) {
this._previousOriginX = this._currentTransform.target.originX;
this._previousOriginY = this._currentTransform.target.originY;
var center = target.getCenterPoint();
target.originX = 'center';
target.originY = 'center';
target.left = center.x;
target.top = center.y;
this._currentTransform.left = target.left;
this._currentTransform.top = target.top;
},
/**
* 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.
* @private
* @param {Event} e Event object fired on mousemove
*/
__onMouseMove: function (e) {
var target, pointer;
if (this.isDrawingMode) {
if (this._isCurrentlyDrawing) {
pointer = this.getPointer(e);
this.freeDrawingBrush.onMouseMove(pointer);
}
this.upperCanvasEl.style.cursor = this.freeDrawingCursor;
this.fire('mouse:move', { e: e });
return;
}
var groupSelector = this._groupSelector;
// We initially clicked in an empty area, so we draw a box for multiple selection.
if (groupSelector) {
pointer = getPointer(e, this.upperCanvasEl);
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 || target && !target.selectable) {
// no target - set default cursor
style.cursor = this.defaultCursor;
}
else {
// set proper cursor
this._setCursorFromEvent(e, target);
}
}
else {
// object is being transformed (scaled/rotated/moved/etc.)
pointer = getPointer(e, this.upperCanvasEl);
var x = pointer.x,
y = pointer.y,
reset = false,
transform = this._currentTransform;
target = transform.target;
target.isMoving = true;
if ((transform.action === 'scale' || transform.action === 'scaleX' || transform.action === 'scaleY') &&
// Switch from a normal resize to center-based
((e.altKey && (transform.originX !== 'center' || transform.originY !== 'center')) ||
// Switch from center-based resize to normal one
(!e.altKey && transform.originX === 'center' && transform.originY === 'center'))
) {
this._resetCurrentTransform(e);
reset = true;
}
if (transform.action === 'rotate') {
this._rotateObject(x, y);
this.fire('object:rotating', { target: target, e: e });
target.fire('rotating', { e: e });
}
else if (transform.action === 'scale') {
// rotate object only if shift key is not pressed
// and if it is not a group we are transforming
if ((e.shiftKey || this.uniScaleTransform) && !target.get('lockUniScaling')) {
transform.currentAction = 'scale';
this._scaleObject(x, y);
}
else {
// Switch from a normal resize to proportional
if (!reset && transform.currentAction === 'scale') {
this._resetCurrentTransform(e);
}
transform.currentAction = 'scaleEqually';
this._scaleObject(x, y, 'equally');
}
this.fire('object:scaling', { target: target, e: e });
target.fire('scaling', { e: e });
}
else if (transform.action === 'scaleX') {
this._scaleObject(x, y, 'x');
this.fire('object:scaling', { target: target, e: e});
target.fire('scaling', { e: e });
}
else if (transform.action === 'scaleY') {
this._scaleObject(x, y, 'y');
this.fire('object:scaling', { target: target, e: e});
target.fire('scaling', { e: e });
}
else {
this._translateObject(x, y);
this.fire('object:moving', { target: target, e: e});
target.fire('moving', { e: e });
this._setCursor(this.moveCursor);
}
this.renderAll();
}
this.fire('mouse:move', { target: target, e: e });
target && target.fire('mousemove', { e: e });
},
/**
* Sets the cursor depending on where the canvas is being hovered.
* Note: very buggy in Opera
* @param {Event} e Event object
* @param {Object} target Object that the mouse is hovering, if so.
*/
_setCursorFromEvent: function (e, target) {
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 = target.hoverCursor || this.hoverCursor;
}
else {
if (corner in cursorOffset) {
var n = Math.round((target.getAngle() % 360) / 45);
if (n<0) {
n += 8; // full circle ahead
}
n += cursorOffset[corner];
// normalize n to be from 0 to 7
n %= 8;
s.cursor = cursorMap[n];
}
else if (corner === 'mtr' && target.hasRotatingPoint) {
s.cursor = this.rotationCursor;
}
else {
s.cursor = this.defaultCursor;
return false;
}
}
}
return true;
}
});
})();
fabric.util.object.extend(fabric.StaticCanvas.prototype, /** @lends fabric.StaticCanvas.prototype */ {
/**
* Exports canvas element to a dataurl image. Note that when multiplier is used, cropping is scaled appropriately
* @param {Object} [options] Options object
* @param {String} [options.format=png] The format of the output image. Either "jpeg" or "png"
* @param {Number} [options.quality=1] Quality level (0..1). Only used for jpeg.
* @param {Number} [options.multiplier=1] Multiplier to scale by
* @param {Number} [options.left] Cropping left offset
* @param {Number} [options.top] Cropping top offset
* @param {Number} [options.width] Cropping width
* @param {Number} [options.height] Cropping height
* @return {String} Returns a data: URL containing a representation of the object in the format specified by options.format
*/
toDataURL: function (options) {
options || (options = { });
var format = options.format || 'png',
quality = options.quality || 1,
multiplier = options.multiplier || 1,
cropping = {
left: options.left,
top: options.top,
width: options.width,
height: options.height
};
if (multiplier !== 1) {
return this.__toDataURLWithMultiplier(format, quality, cropping, multiplier);
}
else {
return this.__toDataURL(format, quality, cropping);
}
},
/**
* @private
*/
__toDataURL: function(format, quality, cropping) {
this.renderAll(true);
var canvasEl = this.upperCanvasEl || this.lowerCanvasEl;
var croppedCanvasEl = this.__getCroppedCanvas(canvasEl, cropping);
// to avoid common confusion https://github.com/kangax/fabric.js/issues/806
if (format === 'jpg') {
format = 'jpeg';
}
var data = (fabric.StaticCanvas.supports('toDataURLWithQuality'))
? (croppedCanvasEl || canvasEl).toDataURL('image/' + format, quality)
: (croppedCanvasEl || canvasEl).toDataURL('image/' + format);
this.contextTop && this.clearContext(this.contextTop);
this.renderAll();
if (croppedCanvasEl) {
croppedCanvasEl = null;
}
return data;
},
/**
* @private
*/
__getCroppedCanvas: function(canvasEl, cropping) {
var croppedCanvasEl,
croppedCtx;
var shouldCrop = 'left' in cropping ||
'top' in cropping ||
'width' in cropping ||
'height' in cropping;
if (shouldCrop) {
croppedCanvasEl = fabric.util.createCanvasElement();
croppedCtx = croppedCanvasEl.getContext('2d');
croppedCanvasEl.width = cropping.width || this.width;
croppedCanvasEl.height = cropping.height || this.height;
croppedCtx.drawImage(canvasEl, -cropping.left || 0, -cropping.top || 0);
}
return croppedCanvasEl;
},
/**
* @private
*/
__toDataURLWithMultiplier: function(format, quality, cropping, multiplier) {
var origWidth = this.getWidth(),
origHeight = this.getHeight(),
scaledWidth = origWidth * multiplier,
scaledHeight = origHeight * multiplier,
activeObject = this.getActiveObject(),
activeGroup = this.getActiveGroup(),
ctx = this.contextTop || this.contextContainer;
this.setWidth(scaledWidth).setHeight(scaledHeight);
ctx.scale(multiplier, multiplier);
if (cropping.left) {
cropping.left *= multiplier;
}
if (cropping.top) {
cropping.top *= multiplier;
}
if (cropping.width) {
cropping.width *= multiplier;
}
if (cropping.height) {
cropping.height *= multiplier;
}
if (activeGroup) {
// not removing group due to complications with restoring it with correct state afterwords
this._tempRemoveBordersControlsFromGroup(activeGroup);
}
else if (activeObject && this.deactivateAll) {
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 data = this.__toDataURL(format, quality, cropping);
ctx.scale(1 / multiplier, 1 / multiplier);
this.setWidth(origWidth).setHeight(origHeight);
if (activeGroup) {
this._restoreBordersControlsOnGroup(activeGroup);
}
else if (activeObject && this.setActiveObject) {
this.setActiveObject(activeObject);
}
this.contextTop && this.clearContext(this.contextTop);
this.renderAll();
return data;
},
/**
* Exports canvas element to a dataurl image (allowing to change image size via multiplier).
* @deprecated since 1.0.13
* @param {String} format (png|jpeg)
* @param {Number} multiplier
* @param {Number} quality (0..1)
* @return {String}
*/
toDataURLWithMultiplier: function (format, multiplier, quality) {
return this.toDataURL({
format: format,
multiplier: multiplier,
quality: quality
});
},
/**
* @private
*/
_tempRemoveBordersControlsFromGroup: function(group) {
group.origHasControls = group.hasControls;
group.origBorderColor = group.borderColor;
group.hasControls = true;
group.borderColor = 'rgba(0,0,0,0)';
group.forEachObject(function(o) {
o.origBorderColor = o.borderColor;
o.borderColor = 'rgba(0,0,0,0)';
});
},
/**
* @private
*/
_restoreBordersControlsOnGroup: function(group) {
group.hideControls = group.origHideControls;
group.borderColor = group.origBorderColor;
group.forEachObject(function(o) {
o.borderColor = o.origBorderColor;
delete o.origBorderColor;
});
}
});
fabric.util.object.extend(fabric.StaticCanvas.prototype, /** @lends fabric.StaticCanvas.prototype */ {
/**
* Populates canvas with data from the specified dataless JSON
* JSON format must conform to the one of `fabric.Canvas#toDatalessJSON`
* @deprecated since 1.2.2
* @param {String|Object} json JSON string or object
* @param {Function} callback Callback, invoked when json is parsed
* and corresponding objects (e.g: fabric.Image)
* are initialized
* @param {Function} [reviver] Method for further parsing of JSON elements, called after each fabric object created.
* @return {fabric.Canvas} instance
* @chainable
*/
loadFromDatalessJSON: function (json, callback, reviver) {
return this.loadFromJSON(json, callback, reviver);
},
/**
* Populates canvas with data from the specified JSON
* JSON format must conform to the one of `fabric.Canvas#toJSON`
* @param {String|Object} json JSON string or object
* @param {Function} callback Callback, invoked when json is parsed
* and corresponding objects (e.g: fabric.Image)
* are initialized
* @param {Function} [reviver] Method for further parsing of JSON elements, called after each fabric object created.
* @return {fabric.Canvas} instance
* @chainable
*/
loadFromJSON: function (json, callback, reviver) {
if (!json) return;
// serialize if it wasn't already
var serialized = (typeof json === 'string')
? JSON.parse(json)
: json;
this.clear();
var _this = this;
this._enlivenObjects(serialized.objects, function () {
_this._setBgOverlayImages(serialized, callback);
}, reviver);
return this;
},
_setBgOverlayImages: function(serialized, callback) {
var _this = this,
backgroundPatternLoaded,
backgroundImageLoaded,
overlayImageLoaded;
var cbIfLoaded = function () {
callback && backgroundImageLoaded && overlayImageLoaded && backgroundPatternLoaded && callback();
};
if (serialized.backgroundImage) {
this.setBackgroundImage(serialized.backgroundImage, function() {
_this.backgroundImageOpacity = serialized.backgroundImageOpacity;
_this.backgroundImageStretch = serialized.backgroundImageStretch;
_this.renderAll();
backgroundImageLoaded = true;
cbIfLoaded();
});
}
else {
backgroundImageLoaded = true;
}
if (serialized.overlayImage) {
this.setOverlayImage(serialized.overlayImage, function() {
_this.overlayImageLeft = serialized.overlayImageLeft || 0;
_this.overlayImageTop = serialized.overlayImageTop || 0;
_this.renderAll();
overlayImageLoaded = true;
cbIfLoaded();
});
}
else {
overlayImageLoaded = true;
}
if (serialized.background) {
this.setBackgroundColor(serialized.background, function() {
_this.renderAll();
backgroundPatternLoaded = true;
cbIfLoaded();
});
}
else {
backgroundPatternLoaded = true;
}
if (!serialized.backgroundImage && !serialized.overlayImage && !serialized.background) {
callback && callback();
}
},
/**
* @private
* @param {Array} objects
* @param {Function} callback
* @param {Function} [reviver]
*/
_enlivenObjects: function (objects, callback, reviver) {
var _this = this;
if (objects.length === 0) {
callback && callback();
}
var renderOnAddRemove = this.renderOnAddRemove;
this.renderOnAddRemove = false;
fabric.util.enlivenObjects(objects, function(enlivenedObjects) {
enlivenedObjects.forEach(function(obj, index) {
_this.insertAt(obj, index, true);
});
_this.renderOnAddRemove = renderOnAddRemove;
callback && callback();
}, null, reviver);
},
/**
* @private
* @param {String} format
* @param {Function} callback
*/
_toDataURL: function (format, callback) {
this.clone(function (clone) {
callback(clone.toDataURL(format));
});
},
/**
* @private
* @param {String} format
* @param {Number} multiplier
* @param {Function} callback
*/
_toDataURLWithMultiplier: function (format, multiplier, callback) {
this.clone(function (clone) {
callback(clone.toDataURLWithMultiplier(format, multiplier));
});
},
/**
* Clones canvas instance
* @param {Object} [callback] Receives cloned instance as a first argument
*/
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)
* @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,
degreesToRadians = fabric.util.degreesToRadians,
supportsLineDash = fabric.StaticCanvas.supports('setLineDash');
if (fabric.Object) {
return;
}
/**
* Root object class from which all 2d shape classes inherit from
* @class fabric.Object
*/
fabric.Object = fabric.util.createClass(/** @lends fabric.Object.prototype */ {
/**
* Type of an object (rect, circle, path, etc.)
* @type String
* @default
*/
type: 'object',
/**
* Horizontal origin of transformation of an object (one of "left", "right", "center")
* @type String
* @default
*/
originX: 'center',
/**
* Vertical origin of transformation of an object (one of "top", "bottom", "center")
* @type String
* @default
*/
originY: 'center',
/**
* Top position of an object. Note that by default it's relative to object center. You can change this by setting originY={top/center/bottom}
* @type Number
* @default
*/
top: 0,
/**
* Left position of an object. Note that by default it's relative to object center. You can change this by setting originX={left/center/right}
* @type Number
* @default
*/
left: 0,
/**
* Object width
* @type Number
* @default
*/
width: 0,
/**
* Object height
* @type Number
* @default
*/
height: 0,
/**
* Object scale factor (horizontal)
* @type Number
* @default
*/
scaleX: 1,
/**
* Object scale factor (vertical)
* @type Number
* @default
*/
scaleY: 1,
/**
* When true, an object is rendered as flipped horizontally
* @type Boolean
* @default
*/
flipX: false,
/**
* When true, an object is rendered as flipped vertically
* @type Boolean
* @default
*/
flipY: false,
/**
* Opacity of an object
* @type Number
* @default
*/
opacity: 1,
/**
* Angle of rotation of an object (in degrees)
* @type Number
* @default
*/
angle: 0,
/**
* Size of object's controlling corners (in pixels)
* @type Number
* @default
*/
cornerSize: 12,
/**
* When true, object's controlling corners are rendered as transparent inside (i.e. stroke instead of fill)
* @type Boolean
* @default
*/
transparentCorners: true,
/**
* Default cursor value used when hovering over this object on canvas
* @type String
* @default
*/
hoverCursor: null,
/**
* Padding between object and its controlling borders (in pixels)
* @type Number
* @default
*/
padding: 0,
/**
* Color of controlling borders of an object (when it's active)
* @type String
* @default
*/
borderColor: 'rgba(102,153,255,0.75)',
/**
* Color of controlling corners of an object (when it's active)
* @type String
* @default
*/
cornerColor: 'rgba(102,153,255,0.5)',
/**
* When true, this object will use center point as the origin of transformation
* when being resized via the controls
* @type Boolean
*/
centerTransform: false,
/**
* Color of object's fill
* @type String
* @default
*/
fill: 'rgb(0,0,0)',
/**
* Fill rule used to fill an object
* @type String
* @default
*/
fillRule: 'source-over',
/**
* Overlay fill (takes precedence over fill value)
* @type String
* @default
*/
overlayFill: null,
/**
* When defined, an object is rendered via stroke and this property specifies its color
* @type String
* @default
*/
stroke: null,
/**
* Width of a stroke used to render this object
* @type Number
* @default
*/
strokeWidth: 1,
/**
* Array specifying dash pattern of an object's stroke (stroke must be defined)
* @type Array
*/
strokeDashArray: null,
/**
* Line endings style of an object's stroke (one of "butt", "round", "square")
* @type String
* @default
*/
strokeLineCap: 'butt',
/**
* Corner style of an object's stroke (one of "bevil", "round", "miter")
* @type String
* @default
*/
strokeLineJoin: 'miter',
/**
* Maximum miter length (used for strokeLineJoin = "miter") of an object's stroke
* @type Number
* @default
*/
strokeMiterLimit: 10,
/**
* Shadow object representing shadow of this shape
* @type fabric.Shadow
* @default
*/
shadow: null,
/**
* Opacity of object's controlling borders when object is active and moving
* @type Number
* @default
*/
borderOpacityWhenMoving: 0.4,
/**
* Scale factor of object's controlling borders
* @type Number
* @default
*/
borderScaleFactor: 1,
/**
* Transform matrix (similar to SVG's transform matrix)
* @type Array
*/
transformMatrix: null,
/**
* Minimum allowed scale value of an object
* @type Number
* @default
*/
minScaleLimit: 0.01,
/**
* When set to `false`, an object can not be selected for modification (using either point-click-based or group-based selection).
* All events propagate through it.
* @type Boolean
* @default
*/
selectable: true,
/**
* When set to `false`, an object is not rendered on canvas
* @type Boolean
* @default
*/
visible: true,
/**
* When set to `false`, object's controls are not displayed and can not be used to manipulate object
* @type Boolean
* @default
*/
hasControls: true,
/**
* When set to `false`, object's controlling borders are not rendered
* @type Boolean
* @default
*/
hasBorders: true,
/**
* When set to `false`, object's controlling rotating point will not be visible or selectable
* @type Boolean
* @default
*/
hasRotatingPoint: true,
/**
* Offset for object's controlling rotating point (when enabled via `hasRotatingPoint`)
* @type Number
* @default
*/
rotatingPointOffset: 40,
/**
* When set to `true`, objects are "found" on canvas on per-pixel basis rather than according to bounding box
* @type Boolean
* @default
*/
perPixelTargetFind: false,
/**
* When `false`, default object's values are not included in its serialization
* @type Boolean
* @default
*/
includeDefaultValues: true,
/**
* Function that determines clipping of an object (context is passed as a first argument)
* @type Function
*/
clipTo: null,
/**
* When `true`, object horizontal movement is locked
* @type Boolean
* @default
*/
lockMovementX: false,
/**
* When `true`, object vertical movement is locked
* @type Boolean
* @default
*/
lockMovementY: false,
/**
* When `true`, object rotation is locked
* @type Boolean
* @default
*/
lockRotation: false,
/**
* When `true`, object horizontal scaling is locked
* @type Boolean
* @default
*/
lockScalingX: false,
/**
* When `true`, object vertical scaling is locked
* @type Boolean
* @default
*/
lockScalingY: false,
/**
* When `true`, object non-uniform scaling is locked
* @type Boolean
* @default
*/
lockUniScaling: false,
/**
* List of properties to consider when checking if state
* of an object is changed (fabric.Object#hasStateChanged)
* as well as for history (undo/redo) purposes
* @type Array
*/
stateProperties: (
'top left width height scaleX scaleY flipX flipY originX originY transformMatrix ' +
'stroke strokeWidth strokeDashArray strokeLineCap strokeLineJoin strokeMiterLimit ' +
'angle opacity fill fillRule overlayFill shadow clipTo visible'
).split(' '),
/**
* Constructor
* @param {Object} [options] Options object
*/
initialize: function(options) {
if (options) {
this.setOptions(options);
}
},
/**
* @private
*/
_initGradient: function(options) {
if (options.fill && options.fill.colorStops && !(options.fill instanceof fabric.Gradient)) {
this.set('fill', new fabric.Gradient(options.fill));
}
},
/**
* @private
*/
_initPattern: function(options) {
if (options.fill && options.fill.source && !(options.fill instanceof fabric.Pattern)) {
this.set('fill', new fabric.Pattern(options.fill));
}
if (options.stroke && options.stroke.source && !(options.stroke instanceof fabric.Pattern)) {
this.set('stroke', new fabric.Pattern(options.stroke));
}
},
/**
* @private
*/
_initClipping: function(options) {
if (!options.clipTo || typeof options.clipTo !== 'string') return;
var functionBody = fabric.util.getFunctionBody(options.clipTo);
if (typeof functionBody !== 'undefined') {
this.clipTo = new Function('ctx', functionBody);
}
},
/**
* Sets object's properties from options
* @param {Object} [options] Options object
*/
setOptions: function(options) {
for (var prop in options) {
this.set(prop, options[prop]);
}
this._initGradient(options);
this._initPattern(options);
this._initClipping(options);
},
/**
* Transforms context when rendering an object
* @param {CanvasRenderingContext2D} ctx Context
* @param {Boolean} fromLeft When true, context is transformed to object's top/left corner. This is used when rendering text on Node
*/
transform: function(ctx, fromLeft) {
ctx.globalAlpha = this.opacity;
var center = fromLeft ? this._getLeftTopCoords() : this.getCenterPoint();
ctx.translate(center.x, center.y);
ctx.rotate(degreesToRadians(this.angle));
ctx.scale(
this.scaleX * (this.flipX ? -1 : 1),
this.scaleY * (this.flipY ? -1 : 1)
);
},
/**
* Returns an object representation of an instance
* @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output
* @return {Object} Object representation of an instance
*/
toObject: function(propertiesToInclude) {
var NUM_FRACTION_DIGITS = fabric.Object.NUM_FRACTION_DIGITS;
var object = {
type: this.type,
originX: this.originX,
originY: this.originY,
left: toFixed(this.left, NUM_FRACTION_DIGITS),
top: toFixed(this.top, NUM_FRACTION_DIGITS),
width: toFixed(this.width, NUM_FRACTION_DIGITS),
height: toFixed(this.height, NUM_FRACTION_DIGITS),
fill: (this.fill && this.fill.toObject) ? this.fill.toObject() : this.fill,
overlayFill: this.overlayFill,
stroke: (this.stroke && this.stroke.toObject) ? this.stroke.toObject() : this.stroke,
strokeWidth: toFixed(this.strokeWidth, NUM_FRACTION_DIGITS),
strokeDashArray: this.strokeDashArray,
strokeLineCap: this.strokeLineCap,
strokeLineJoin: this.strokeLineJoin,
strokeMiterLimit: toFixed(this.strokeMiterLimit, NUM_FRACTION_DIGITS),
scaleX: toFixed(this.scaleX, NUM_FRACTION_DIGITS),
scaleY: toFixed(this.scaleY, NUM_FRACTION_DIGITS),
angle: toFixed(this.getAngle(), NUM_FRACTION_DIGITS),
flipX: this.flipX,
flipY: this.flipY,
opacity: toFixed(this.opacity, NUM_FRACTION_DIGITS),
shadow: (this.shadow && this.shadow.toObject) ? this.shadow.toObject() : this.shadow,
visible: this.visible,
clipTo: this.clipTo && String(this.clipTo)
};
if (!this.includeDefaultValues) {
object = this._removeDefaultValues(object);
}
fabric.util.populateWithProperties(this, object, propertiesToInclude);
return object;
},
/**
* Returns (dataless) object representation of an instance
* @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output
* @return {Object} Object representation of an instance
*/
toDatalessObject: function(propertiesToInclude) {
// will be overwritten by subclasses
return this.toObject(propertiesToInclude);
},
/* _TO_SVG_START_ */
/**
* Returns styles-string for svg-export
* @return {String}
*/
getSvgStyles: function() {
var fill = this.fill
? (this.fill.toLive ? 'url(#SVGID_' + this.fill.id + ')' : this.fill)
: 'none';
var stroke = this.stroke
? (this.stroke.toLive ? 'url(#SVGID_' + this.stroke.id + ')' : this.stroke)
: 'none';
var strokeWidth = this.strokeWidth ? this.strokeWidth : '0';
var strokeDashArray = this.strokeDashArray ? this.strokeDashArray.join(' ') : '';
var strokeLineCap = this.strokeLineCap ? this.strokeLineCap : 'butt';
var strokeLineJoin = this.strokeLineJoin ? this.strokeLineJoin : 'miter';
var strokeMiterLimit = this.strokeMiterLimit ? this.strokeMiterLimit : '4';
var opacity = typeof this.opacity !== 'undefined' ? this.opacity : '1';
var visibility = this.visible ? '' : " visibility: hidden;";
var filter = this.shadow && this.type !== 'text' ? 'filter: url(#SVGID_' + this.shadow.id + ');' : '';
return [
"stroke: ", stroke, "; ",
"stroke-width: ", strokeWidth, "; ",
"stroke-dasharray: ", strokeDashArray, "; ",
"stroke-linecap: ", strokeLineCap, "; ",
"stroke-linejoin: ", strokeLineJoin, "; ",
"stroke-miterlimit: ", strokeMiterLimit, "; ",
"fill: ", fill, "; ",
"opacity: ", opacity, ";",
filter,
visibility
].join('');
},
/**
* Returns transform-string for svg-export
* @return {String}
*/
getSvgTransform: function() {
var angle = this.getAngle();
var center = this.getCenterPoint();
var NUM_FRACTION_DIGITS = fabric.Object.NUM_FRACTION_DIGITS;
var translatePart = "translate(" +
toFixed(center.x, NUM_FRACTION_DIGITS) +
" " +
toFixed(center.y, 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('');
},
_createBaseSVGMarkup: function() {
var markup = [ ];
if (this.fill && this.fill.toLive) {
markup.push(this.fill.toSVG(this, false));
}
if (this.stroke && this.stroke.toLive) {
markup.push(this.stroke.toSVG(this, false));
}
if (this.shadow) {
markup.push(this.shadow.toSVG(this));
}
return markup;
},
/* _TO_SVG_END_ */
/**
* @private
* @param {Object} object
*/
_removeDefaultValues: function(object) {
this.stateProperties.forEach(function(prop) {
if (object[prop] === this.constructor.prototype[prop]) {
delete object[prop];
}
}, this);
return object;
},
/**
* Returns a string representation of an instance
* @return {String}
*/
toString: function() {
return "#<fabric." + capitalize(this.type) + ">";
},
/**
* Basic getter
* @param {String} property Property name
* @return {Any} value of a property
*/
get: function(property) {
return this[property];
},
/**
* Sets property to a given value. When changing position/dimension -related properties (left, top, scale, angle, etc.) `set` does not update position of object's borders/controls. If you need to update those, call `setCoords()`.
* @param {String|Object} key Property name or object (if object, iterate over the object properties)
* @param {Object|Function} value Property value (if function, the value is passed into it and its return value is used as a new one)
* @return {fabric.Object} thisArg
* @chainable
*/
set: function(key, value) {
if (typeof key === 'object') {
for (var prop in key) {
this._set(prop, key[prop]);
}
}
else {
if (typeof value === 'function' && key !== 'clipTo') {
this._set(key, value(this.get(key)));
}
else {
this._set(key, value);
}
}
return this;
},
/**
* @private
* @param {String} key
* @param {Any} value
* @return {fabric.Object} thisArg
*/
_set: function(key, value) {
var shouldConstrainValue = (key === 'scaleX' || key === 'scaleY');
if (shouldConstrainValue) {
value = this._constrainScale(value);
}
if (key === 'scaleX' && value < 0) {
this.flipX = !this.flipX;
value *= -1;
}
else if (key === 'scaleY' && value < 0) {
this.flipY = !this.flipY;
value *= -1;
}
else if (key === 'width' || key === 'height') {
this.minScaleLimit = toFixed(Math.min(0.1, 1/Math.max(this.width, this.height)), 2);
}
else if (key === 'shadow' && value && !(value instanceof fabric.Shadow)) {
value = new fabric.Shadow(value);
}
this[key] = value;
return this;
},
/**
* Toggles specified property from `true` to `false` or from `false` to `true`
* @param {String} property Property to toggle
* @return {fabric.Object} thisArg
* @chainable
*/
toggle: function(property) {
var value = this.get(property);
if (typeof value === 'boolean') {
this.set(property, !value);
}
return this;
},
/**
* Sets sourcePath of an object
* @param {String} value Value to set sourcePath to
* @return {fabric.Object} thisArg
* @chainable
*/
setSourcePath: function(value) {
this.sourcePath = value;
return this;
},
/**
* Renders an object on a specified context
* @param {CanvasRenderingContext2D} ctx Context to render on
* @param {Boolean} [noTransform] When true, context is not transformed
*/
render: function(ctx, noTransform) {
// do not render if width/height are zeros or object is not visible
if (this.width === 0 || this.height === 0 || !this.visible) 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) {
ctx.lineWidth = this.strokeWidth;
ctx.lineCap = this.strokeLineCap;
ctx.lineJoin = this.strokeLineJoin;
ctx.miterLimit = this.strokeMiterLimit;
ctx.strokeStyle = this.stroke.toLive
? this.stroke.toLive(ctx)
: this.stroke;
}
if (this.overlayFill) {
ctx.fillStyle = this.overlayFill;
}
else if (this.fill) {
ctx.fillStyle = this.fill.toLive
? this.fill.toLive(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._setShadow(ctx);
this.clipTo && fabric.util.clipContext(this, ctx);
this._render(ctx, noTransform);
this.clipTo && ctx.restore();
this._removeShadow(ctx);
if (this.active && !noTransform) {
this.drawBorders(ctx);
this.drawControls(ctx);
}
ctx.restore();
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_setShadow: function(ctx) {
if (!this.shadow) return;
ctx.shadowColor = this.shadow.color;
ctx.shadowBlur = this.shadow.blur;
ctx.shadowOffsetX = this.shadow.offsetX;
ctx.shadowOffsetY = this.shadow.offsetY;
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_removeShadow: function(ctx) {
ctx.shadowColor = '';
ctx.shadowBlur = ctx.shadowOffsetX = ctx.shadowOffsetY = 0;
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_renderFill: function(ctx) {
if (!this.fill) return;
if (this.fill.toLive) {
ctx.save();
ctx.translate(
-this.width / 2 + this.fill.offsetX || 0,
-this.height / 2 + this.fill.offsetY || 0);
}
ctx.fill();
if (this.fill.toLive) {
ctx.restore();
}
if (this.shadow && !this.shadow.affectStroke) {
this._removeShadow(ctx);
}
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_renderStroke: function(ctx) {
if (!this.stroke) return;
ctx.save();
if (this.strokeDashArray) {
// Spec requires the concatenation of two copies the dash list when the number of elements is odd
if (1 & this.strokeDashArray.length) {
this.strokeDashArray.push.apply(this.strokeDashArray, this.strokeDashArray);
}
if (supportsLineDash) {
ctx.setLineDash(this.strokeDashArray);
this._stroke && this._stroke(ctx);
}
else {
this._renderDashedStroke && this._renderDashedStroke(ctx);
}
ctx.stroke();
}
else {
this._stroke ? this._stroke(ctx) : ctx.stroke();
}
this._removeShadow(ctx);
ctx.restore();
},
/**
* Clones an instance
* @param {Function} callback Callback is invoked with a clone as a first argument
* @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output
* @return {fabric.Object} clone of an instance
*/
clone: function(callback, propertiesToInclude) {
if (this.constructor.fromObject) {
return this.constructor.fromObject(this.toObject(propertiesToInclude), callback);
}
return new fabric.Object(this.toObject(propertiesToInclude));
},
/**
* Creates an instance of fabric.Image out of an object
* @param callback {Function} callback, invoked with an instance as a first argument
* @return {fabric.Object} thisArg
*/
cloneAsImage: function(callback) {
var dataUrl = this.toDataURL();
fabric.util.loadImage(dataUrl, function(img) {
if (callback) {
callback(new fabric.Image(img));
}
});
return this;
},
/**
* Converts an object into a data-url-like string
* @param {Object} options Options object
* @param {String} [options.format=png] The format of the output image. Either "jpeg" or "png"
* @param {Number} [options.quality=1] Quality level (0..1). Only used for jpeg.
* @param {Number} [options.multiplier=1] Multiplier to scale by
* @param {Number} [options.left] Cropping left offset
* @param {Number} [options.top] Cropping top offset
* @param {Number} [options.width] Cropping width
* @param {Number} [options.height] Cropping height
* @return {String} Returns a data: URL containing a representation of the object in the format specified by options.format
*/
toDataURL: function(options) {
options || (options = { });
var el = fabric.util.createCanvasElement(),
boundingRect = this.getBoundingRect();
el.width = boundingRect.width;
el.height = boundingRect.height;
fabric.util.wrapElement(el, 'div');
var canvas = new fabric.Canvas(el);
// to avoid common confusion https://github.com/kangax/fabric.js/issues/806
if (options.format === 'jpg') {
options.format = 'jpeg';
}
if (options.format === 'jpeg') {
canvas.backgroundColor = '#fff';
}
var origParams = {
active: this.get('active'),
left: this.getLeft(),
top: this.getTop()
};
this.set('active', false);
this.setPositionByOrigin(new fabric.Point(el.width / 2, el.height / 2), 'center', 'center');
canvas.add(this);
var data = canvas.toDataURL(options);
this.set(origParams).setCoords();
canvas.dispose();
canvas = null;
return data;
},
/**
* Returns true if specified type is identical to the type of an instance
* @param type {String} type Type to check against
* @return {Boolean}
*/
isType: function(type) {
return this.type === type;
},
/**
* Makes object's color grayscale
* @return {fabric.Object} thisArg
*/
toGrayscale: function() {
var fillValue = this.get('fill');
if (fillValue) {
this.set('overlayFill', new fabric.Color(fillValue).toGrayscale().toRgb());
}
return this;
},
/**
* Returns complexity of an instance
* @return {Number} complexity of this instance
*/
complexity: function() {
return 0;
},
/**
* Returns a JSON representation of an instance
* @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output
* @return {Object} JSON
*/
toJSON: function(propertiesToInclude) {
// delegate, not alias
return this.toObject(propertiesToInclude);
},
/**
* Sets gradient (fill or stroke) of an object
* <b>Backwards incompatibility note:</b> This method was named "setGradientFill" until v1.1.0
* @param {String} property Property name 'stroke' or 'fill'
* @param {Object} [options] Options object
* @param {String} [options.type] Type of gradient 'radial' or 'linear'
* @param {Number} [options.x1=0] x-coordinate of start point
* @param {Number} [options.y1=0] y-coordinate of start point
* @param {Number} [options.x2=0] x-coordinate of end point
* @param {Number} [options.y2=0] y-coordinate of end point
* @param {Number} [options.r1=0] Radius of start point (only for radial gradients)
* @param {Number} [options.r2=0] Radius of end point (only for radial gradients)
* @param {Object} [options.colorStops] Color stops object eg. {0: 'ff0000', 1: '000000'}
* @return {fabric.Object} thisArg
* @chainable
*/
setGradient: function(property, options) {
options || (options = { });
var gradient = {colorStops: []};
gradient.type = options.type || (options.r1 || options.r2 ? 'radial' : 'linear');
gradient.coords = {
x1: options.x1,
y1: options.y1,
x2: options.x2,
y2: options.y2
};
if (options.r1 || options.r2) {
gradient.coords.r1 = options.r1;
gradient.coords.r2 = options.r2;
}
for (var position in options.colorStops) {
var color = new fabric.Color(options.colorStops[position]);
gradient.colorStops.push({offset: position, color: color.toRgb(), opacity: color.getAlpha()});
}
return this.set(property, fabric.Gradient.forObject(this, gradient));
},
/**
* Sets pattern fill of an object
* @param {Object} options Options object
* @param {(String|HTMLImageElement)} options.source Pattern source
* @param {String} [options.repeat=repeat] Repeat property of a pattern (one of repeat, repeat-x, repeat-y or no-repeat)
* @param {Number} [options.offsetX=0] Pattern horizontal offset from object's left/top corner
* @param {Number} [options.offsetY=0] Pattern vertical offset from object's left/top corner
* @return {fabric.Object} thisArg
* @chainable
*/
setPatternFill: function(options) {
return this.set('fill', new fabric.Pattern(options));
},
/**
* Sets shadow of an object
* @param {Object|String} [options] Options object or string (e.g. "2px 2px 10px rgba(0,0,0,0.2)")
* @param {String} [options.color=rgb(0,0,0)] Shadow color
* @param {Number} [options.blur=0] Shadow blur
* @param {Number} [options.offsetX=0] Shadow horizontal offset
* @param {Number} [options.offsetY=0] Shadow vertical offset
* @return {fabric.Object} thisArg
* @chainable
*/
setShadow: function(options) {
return this.set('shadow', new fabric.Shadow(options));
},
/**
* Sets "color" of an instance (alias of `set('fill', &hellip;)`)
* @param {String} color Color value
* @return {fabric.Text} thisArg
* @chainable
*/
setColor: function(color) {
this.set('fill', color);
return this;
},
/**
* Centers object horizontally on canvas to which it was added last.
* You might need to call `setCoords` on an object after centering, to update controls area.
* @return {fabric.Object} thisArg
* @chainable
*/
centerH: function () {
this.canvas.centerObjectH(this);
return this;
},
/**
* Centers object vertically on canvas to which it was added last.
* You might need to call `setCoords` on an object after centering, to update controls area.
* @return {fabric.Object} thisArg
* @chainable
*/
centerV: function () {
this.canvas.centerObjectV(this);
return this;
},
/**
* Centers object vertically and horizontally on canvas to which is was added last
* You might need to call `setCoords` on an object after centering, to update controls area.
* @return {fabric.Object} thisArg
* @chainable
*/
center: function () {
return this.centerH().centerV();
},
/**
* Removes object from canvas to which it was added last
* @return {fabric.Object} thisArg
* @chainable
*/
remove: function() {
return this.canvas.remove(this);
},
/**
* Moves an object to the bottom of the stack of drawn objects
* @return {fabric.Object} thisArg
* @chainable
*/
sendToBack: function() {
if (this.group) {
fabric.StaticCanvas.prototype.sendToBack.call(this.group, this);
}
else {
this.canvas.sendToBack(this);
}
return this;
},
/**
* Moves an object to the top of the stack of drawn objects
* @return {fabric.Object} thisArg
* @chainable
*/
bringToFront: function() {
if (this.group) {
fabric.StaticCanvas.prototype.bringToFront.call(this.group, this);
}
else {
this.canvas.bringToFront(this);
}
return this;
},
/**
* Moves an object down in stack of drawn objects
* @param {Boolean} [intersecting] If `true`, send object behind next lower intersecting object
* @return {fabric.Object} thisArg
* @chainable
*/
sendBackwards: function(intersecting) {
if (this.group) {
fabric.StaticCanvas.prototype.sendBackwards.call(this.group, this, intersecting);
}
else {
this.canvas.sendBackwards(this, intersecting);
}
return this;
},
/**
* Moves an object up in stack of drawn objects
* @param {Boolean} [intersecting] If `true`, send object in front of next upper intersecting object
* @return {fabric.Object} thisArg
* @chainable
*/
bringForward: function(intersecting) {
if (this.group) {
fabric.StaticCanvas.prototype.bringForward.call(this.group, this, intersecting);
}
else {
this.canvas.bringForward(this, intersecting);
}
return this;
},
/**
* Moves an object to specified level in stack of drawn objects
* @param {Number} index New position of object
* @return {fabric.Object} thisArg
* @chainable
*/
moveTo: function(index) {
if (this.group) {
fabric.StaticCanvas.prototype.moveTo.call(this.group, this, index);
}
else {
this.canvas.moveTo(this, index);
}
return this;
}
});
fabric.util.createAccessors(fabric.Object);
/**
* Alias for {@link fabric.Object.prototype.setAngle}
* @alias rotate -> setAngle
* @memberof fabric.Object
*/
fabric.Object.prototype.rotate = fabric.Object.prototype.setAngle;
extend(fabric.Object.prototype, fabric.Observable);
/**
* Defines the number of fraction digits when serializing object values. You can use it to increase/decrease precision of such values like left, top, scaleX, scaleY, etc.
* @static
* @memberof fabric.Object
* @constant
* @type Number
*/
fabric.Object.NUM_FRACTION_DIGITS = 2;
/**
* @static
* @memberof fabric.Object
* @type Number
*/
fabric.Object.__uid = 0;
})(typeof exports !== 'undefined' ? exports : this);
(function() {
var degreesToRadians = fabric.util.degreesToRadians;
fabric.util.object.extend(fabric.Object.prototype, /** @lends fabric.Object.prototype */ {
/**
* Translates the coordinates from origin to center coordinates (based on the object's dimensions)
* @param {fabric.Point} point The point which corresponds to the originX and originY params
* @param {String} originX Horizontal origin: 'left', 'center' or 'right'
* @param {String} originY Vertical origin: 'top', 'center' or 'bottom'
* @return {fabric.Point}
*/
translateToCenterPoint: function(point, originX, originY) {
var cx = point.x, cy = point.y;
if ( originX === "left" ) {
cx = point.x + ( this.getWidth() + (this.strokeWidth*this.scaleX) )/ 2;
}
else if ( originX === "right" ) {
cx = point.x - ( this.getWidth() + (this.strokeWidth*this.scaleX) ) / 2;
}
if ( originY === "top" ) {
cy = point.y +( this.getHeight() + (this.strokeWidth*this.scaleY) ) / 2;
}
else if ( originY === "bottom" ) {
cy = point.y - ( this.getHeight() + (this.strokeWidth*this.scaleY) ) / 2;
}
// Apply the reverse rotation to the point (it's already scaled properly)
return fabric.util.rotatePoint(new fabric.Point(cx, cy), point, degreesToRadians(this.angle));
},
/**
* Translates the coordinates from center to origin coordinates (based on the object's dimensions)
* @param {fabric.Point} point The point which corresponds to center of the object
* @param {String} originX Horizontal origin: 'left', 'center' or 'right'
* @param {String} originY Vertical origin: 'top', 'center' or 'bottom'
* @return {fabric.Point}
*/
translateToOriginPoint: function(center, originX, originY) {
var x = center.x, y = center.y;
// Get the point coordinates
if ( originX === "left" ) {
x = center.x - ( this.getWidth() + (this.strokeWidth*this.scaleX) ) / 2;
}
else if ( originX === "right" ) {
x = center.x + ( this.getWidth() + (this.strokeWidth*this.scaleX) ) / 2;
}
if ( originY === "top" ) {
y = center.y - ( this.getHeight() + (this.strokeWidth*this.scaleY) )/ 2;
}
else if ( originY === "bottom" ) {
y = center.y + ( this.getHeight() + (this.strokeWidth*this.scaleY) )/ 2;
}
// Apply the rotation to the point (it's already scaled properly)
return fabric.util.rotatePoint(new fabric.Point(x, y), center, degreesToRadians(this.angle));
},
/**
* Returns the real center coordinates of the object
* @return {fabric.Point}
*/
getCenterPoint: function() {
var leftTop = new fabric.Point(this.left, this.top);
return this.translateToCenterPoint(leftTop, this.originX, this.originY);
},
/**
* Returns the coordinates of the object based on center coordinates
* @param {fabric.Point} point The point which corresponds to the originX and originY params
* @return {fabric.Point}
*/
// getOriginPoint: function(center) {
// return this.translateToOriginPoint(center, this.originX, this.originY);
// },
/**
* Returns the coordinates of the object as if it has a different origin
* @param {String} originX Horizontal origin: 'left', 'center' or 'right'
* @param {String} originY Vertical origin: 'top', 'center' or 'bottom'
* @return {fabric.Point}
*/
getPointByOrigin: function(originX, originY) {
var center = this.getCenterPoint();
return this.translateToOriginPoint(center, originX, originY);
},
/**
* Returns the point in local coordinates
* @param {fabric.Point} The point relative to the global coordinate system
* @return {fabric.Point}
*/
toLocalPoint: function(point, originX, originY) {
var center = this.getCenterPoint();
var x, y;
if (originX !== undefined && originY !== undefined) {
if ( originX === "left" ) {
x = center.x - (this.getWidth() + this.strokeWidth*this.scaleX) / 2;
}
else if ( originX === "right" ) {
x = center.x + (this.getWidth() + this.strokeWidth*this.scaleX)/ 2;
}
else {
x = center.x;
}
if ( originY === "top" ) {
y = center.y - (this.getHeight() + this.strokeWidth*this.scaleY) / 2;
}
else if ( originY === "bottom" ) {
y = center.y + (this.getHeight() + this.strokeWidth*this.scaleY)/ 2;
}
else {
y = center.y;
}
}
else {
x = this.left;
y = this.top;
}
return fabric.util.rotatePoint(new fabric.Point(point.x, point.y), center, -degreesToRadians(this.angle))
.subtractEquals(new fabric.Point(x, y));
},
/**
* Returns the point in global coordinates
* @param {fabric.Point} The point relative to the local coordinate system
* @return {fabric.Point}
*/
// toGlobalPoint: function(point) {
// return fabric.util.rotatePoint(point, this.getCenterPoint(), degreesToRadians(this.angle)).addEquals(new fabric.Point(this.left, this.top));
// },
/**
* Sets the position of the object taking into consideration the object's origin
* @param {fabric.Point} point The new position of the object
* @param {String} originX Horizontal origin: 'left', 'center' or 'right'
* @param {String} originY Vertical origin: 'top', 'center' or 'bottom'
* @return {void}
*/
setPositionByOrigin: function(pos, originX, originY) {
var center = this.translateToCenterPoint(pos, originX, originY);
var position = this.translateToOriginPoint(center, this.originX, this.originY);
this.set('left', position.x);
this.set('top', position.y);
},
/**
* @param {String} to One of left, center, right
*/
adjustPosition: function(to) {
var angle = degreesToRadians(this.angle);
var hypotHalf = this.getWidth() / 2;
var xHalf = Math.cos(angle) * hypotHalf;
var yHalf = Math.sin(angle) * hypotHalf;
var hypotFull = this.getWidth();
var xFull = Math.cos(angle) * hypotFull;
var yFull = Math.sin(angle) * hypotFull;
if (this.originX === 'center' && to === 'left' ||
this.originX === 'right' && to === 'center') {
// move half left
this.left -= xHalf;
this.top -= yHalf;
}
else if (this.originX === 'left' && to === 'center' ||
this.originX === 'center' && to === 'right') {
// move half right
this.left += xHalf;
this.top += yHalf;
}
else if (this.originX === 'left' && to === 'right') {
// move full right
this.left += xFull;
this.top += yFull;
}
else if (this.originX === 'right' && to === 'left') {
// move full left
this.left -= xFull;
this.top -= yFull;
}
this.setCoords();
this.originX = to;
},
/**
* @private
*/
_getLeftTopCoords: function() {
var angle = degreesToRadians(this.angle);
var hypotHalf = this.getWidth() / 2;
var xHalf = Math.cos(angle) * hypotHalf;
var yHalf = Math.sin(angle) * hypotHalf;
var x = this.left;
var y = this.top;
if (this.originX === 'center' || this.originX === 'right') {
x -= xHalf;
}
if (this.originY === 'center' || this.originY === 'bottom') {
y -= yHalf;
}
return { x: x, y: y };
}
});
})();
(function() {
var degreesToRadians = fabric.util.degreesToRadians;
fabric.util.object.extend(fabric.Object.prototype, /** @lends fabric.Object.prototype */ {
/**
* Object containing coordinates of object's controls
* @type Object
* @default
*/
oCoords: null,
/**
* Checks if object intersects with an area formed by 2 points
* @param {Object} pointTL top-left point of area
* @param {Object} pointBR bottom-right point of area
* @return {Boolean} true if object intersects with an area formed by 2 points
*/
intersectsWithRect: function(pointTL, pointBR) {
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],
pointTL,
pointBR
);
return intersection.status === 'Intersection';
},
/**
* Checks if object intersects with another object
* @param {Object} other Object to test
* @return {Boolean} true if object intersects with another object
*/
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';
},
/**
* Checks if object is fully contained within area of another object
* @param {Object} other Object to test
* @return {Boolean} true if object is fully contained within area of another object
*/
isContainedWithinObject: function(other) {
var boundingRect = other.getBoundingRect(),
point1 = new fabric.Point(boundingRect.left, boundingRect.top),
point2 = new fabric.Point(boundingRect.left + boundingRect.width, boundingRect.top + boundingRect.height);
return this.isContainedWithinRect(point1, point2);
},
/**
* Checks if object is fully contained within area formed by 2 points
* @param {Object} pointTL top-left point of area
* @param {Object} pointBR bottom-right point of area
* @return {Boolean} true if object is fully contained within area formed by 2 points
*/
isContainedWithinRect: function(pointTL, pointBR) {
var boundingRect = this.getBoundingRect();
return (
boundingRect.left > pointTL.x &&
boundingRect.left + boundingRect.width < pointBR.x &&
boundingRect.top > pointTL.y &&
boundingRect.top + boundingRect.height < pointBR.y
);
},
/**
* Checks if point is inside the object
* @param {Object} point
* @return {Boolean} true if point is inside the object
*/
containsPoint: function(point) {
var lines = this._getImageLines(this.oCoords),
xPoints = this._findCrossPoints(point, lines);
// if xPoints is odd then point is inside the object
return (xPoints !== 0 && xPoints % 2 === 1);
},
/**
* Method that returns an object with the object edges in it, given the coordinates of the corners
* @private
* @param {Object} oCoords Coordinates of the object corners
*/
_getImageLines: function(oCoords) {
return {
topline: {
o: oCoords.tl,
d: oCoords.tr
},
rightline: {
o: oCoords.tr,
d: oCoords.br
},
bottomline: {
o: oCoords.br,
d: oCoords.bl
},
leftline: {
o: oCoords.bl,
d: oCoords.tl
}
};
},
/**
* Helper method to determine how many cross points are between the 4 object edges
* and the horizontal line determined by a point on canvas
* @private
* @param {Object} point
* @param {Object} oCoords Coordinates of the image being evaluated
*/
_findCrossPoints: function(point, oCoords) {
var b1, b2, a1, a2, xi, yi,
xcount = 0,
iLine;
for (var lineKey in oCoords) {
iLine = oCoords[lineKey];
// optimisation 1: line below point. no cross
if ((iLine.o.y < point.y) && (iLine.d.y < point.y)) {
continue;
}
// optimisation 2: line above point. no cross
if ((iLine.o.y >= point.y) && (iLine.d.y >= point.y)) {
continue;
}
// optimisation 3: vertical line case
if ((iLine.o.x === iLine.d.x) && (iLine.o.x >= point.x)) {
xi = iLine.o.x;
yi = point.y;
}
// calculate the intersection point
else {
b1 = 0;
b2 = (iLine.d.y - iLine.o.y) / (iLine.d.x - iLine.o.x);
a1 = point.y- b1 * point.x;
a2 = iLine.o.y - b2 * iLine.o.x;
xi = - (a1 - a2) / (b1 - b2);
yi = a1 + b1 * xi;
}
// dont count xi < point.x cases
if (xi >= point.x) {
xcount += 1;
}
// optimisation 4: specific for square images
if (xcount === 2) {
break;
}
}
return xcount;
},
/**
* Returns width of an object's bounding rectangle
* @deprecated since 1.0.4
* @return {Number} width value
*/
getBoundingRectWidth: function() {
return this.getBoundingRect().width;
},
/**
* Returns height of an object's bounding rectangle
* @deprecated since 1.0.4
* @return {Number} height value
*/
getBoundingRectHeight: function() {
return this.getBoundingRect().height;
},
/**
* Returns coordinates of object's bounding rectangle (left, top, width, height)
* @return {Object} Object with left, top, width, height properties
*/
getBoundingRect: 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);
var width = Math.abs(minX - maxX);
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);
var height = Math.abs(minY - maxY);
return {
left: minX,
top: minY,
width: width,
height: height
};
},
/**
* Returns width of an object
* @return {Number} width value
*/
getWidth: function() {
return this.width * this.scaleX;
},
/**
* Returns height of an object
* @return {Number} height value
*/
getHeight: function() {
return this.height * this.scaleY;
},
/**
* Makes sure the scale is valid and modifies it if necessary
* @private
* @param {Number} value
* @return {Number}
*/
_constrainScale: function(value) {
if (Math.abs(value) < this.minScaleLimit) {
if (value < 0)
return -this.minScaleLimit;
else
return this.minScaleLimit;
}
return value;
},
/**
* Scales an object (equally by x and y)
* @param value {Number} scale factor
* @return {fabric.Object} thisArg
* @chainable
*/
scale: function(value) {
value = this._constrainScale(value);
if (value < 0) {
this.flipX = !this.flipX;
this.flipY = !this.flipY;
value *= -1;
}
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)
* @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)
* @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 corner position coordinates based on current angle, width and height
* @return {fabric.Object} thisArg
* @chainable
*/
setCoords: function() {
var strokeWidth = this.strokeWidth > 1 ? this.strokeWidth : 0,
padding = this.padding,
theta = degreesToRadians(this.angle);
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);
}
var _hypotenuse = Math.sqrt(
Math.pow(this.currentWidth / 2, 2) +
Math.pow(this.currentHeight / 2, 2));
var _angle = Math.atan(isFinite(this.currentHeight / this.currentWidth) ? this.currentHeight / this.currentWidth : 0);
// offset added for rotate and scale actions
var offsetX = Math.cos(_angle + theta) * _hypotenuse,
offsetY = Math.sin(_angle + theta) * _hypotenuse,
sinTh = Math.sin(theta),
cosTh = Math.cos(theta);
var coords = this.getCenterPoint();
var tl = {
x: coords.x - offsetX,
y: coords.y - 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: mt.x,
y: mt.y
};
// 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);
this.oCoords = {
// corners
tl: tl, tr: tr, br: br, bl: bl,
// middle
ml: ml, mt: mt, mr: mr, mb: mb,
// rotating point
mtr: mtr
};
// set coordinates of the draggable boxes in the corners used to scale/rotate the image
this._setCornerCoords && this._setCornerCoords();
return this;
}
});
})();
/*
Depends on `stateProperties`
*/
fabric.util.object.extend(fabric.Object.prototype, /** @lends fabric.Object.prototype */ {
/**
* Returns true if object state (one of its state properties) was changed
* @return {Boolean} true if instance' state has changed since `{@link fabric.Object#saveState}` was called
*/
hasStateChanged: function() {
return this.stateProperties.some(function(prop) {
return this.get(prop) !== this.originalState[prop];
}, this);
},
/**
* Saves state of an object
* @param {Object} [options] Object with additional `stateProperties` array to include when saving state
* @return {fabric.Object} thisArg
*/
saveState: function(options) {
this.stateProperties.forEach(function(prop) {
this.originalState[prop] = this.get(prop);
}, this);
if (options && options.stateProperties) {
options.stateProperties.forEach(function(prop) {
this.originalState[prop] = this.get(prop);
}, this);
}
return this;
},
/**
* Setups state of an object
* @return {fabric.Object} thisArg
*/
setupState: function() {
this.originalState = { };
this.saveState();
return this;
}
});
(function(){
var getPointer = fabric.util.getPointer,
degreesToRadians = fabric.util.degreesToRadians;
fabric.util.object.extend(fabric.Object.prototype, /** @lends fabric.Object.prototype */ {
/**
* Determines which one of the four corners has been clicked
* @private
* @param {Event} e Event object
* @param {Object} offset 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, this.canvas.upperCanvasEl),
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.get('lockUniScaling') && (i === 'mt' || i === 'mr' || i === 'mb' || i === 'ml')) {
continue;
}
lines = this._getImageLines(this.oCoords[i].corner);
// debugging
// canvas.contextTop.fillRect(lines.bottomline.d.x, lines.bottomline.d.y, 2, 2);
// canvas.contextTop.fillRect(lines.bottomline.o.x, lines.bottomline.o.y, 2, 2);
// canvas.contextTop.fillRect(lines.leftline.d.x, lines.leftline.d.y, 2, 2);
// canvas.contextTop.fillRect(lines.leftline.o.x, lines.leftline.o.y, 2, 2);
// canvas.contextTop.fillRect(lines.topline.d.x, lines.topline.d.y, 2, 2);
// canvas.contextTop.fillRect(lines.topline.o.x, lines.topline.o.y, 2, 2);
// canvas.contextTop.fillRect(lines.rightline.d.x, lines.rightline.d.y, 2, 2);
// canvas.contextTop.fillRect(lines.rightline.o.x, lines.rightline.o.y, 2, 2);
xPoints = this._findCrossPoints({x: ex, y: ey}, lines);
if (xPoints !== 0 && xPoints % 2 === 1) {
this.__corner = i;
return i;
}
}
return false;
},
/**
* Sets the coordinates of the draggable boxes in the corners of
* the image used to scale/rotate it.
* @private
*/
_setCornerCoords: function() {
var coords = this.oCoords,
theta = degreesToRadians(this.angle),
newTheta = degreesToRadians(45 - this.angle),
cornerHypotenuse = Math.sqrt(2 * Math.pow(this.cornerSize, 2)) / 2,
cosHalfOffset = cornerHypotenuse * Math.cos(newTheta),
sinHalfOffset = cornerHypotenuse * Math.sin(newTheta),
sinTh = Math.sin(theta),
cosTh = Math.cos(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)
}
};
},
/**
* Draws borders of an object's bounding box.
* Requires public properties: width, height
* Requires public options: padding, borderColor
* @param {CanvasRenderingContext2D} ctx Context to draw on
* @return {fabric.Object} thisArg
* @chainable
*/
drawBorders: function(ctx) {
if (!this.hasBorders) return this;
var padding = this.padding,
padding2 = padding * 2,
strokeWidth = ~~(this.strokeWidth / 2) * 2; // Round down to even number
ctx.save();
ctx.globalAlpha = this.isMoving ? this.borderOpacityWhenMoving : 1;
ctx.strokeStyle = this.borderColor;
var scaleX = 1 / this._constrainScale(this.scaleX),
scaleY = 1 / this._constrainScale(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) + 1, // double offset needed to make lines look sharper
~~(h + padding2 + strokeWidth * this.scaleY) + 1
);
if (this.hasRotatingPoint && !this.get('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;
},
/**
* Draws corners of an object's bounding box.
* Requires public properties: width, height, scaleX, scaleY
* Requires public options: cornerSize, padding
* @param {CanvasRenderingContext2D} ctx Context to draw on
* @return {fabric.Object} thisArg
* @chainable
*/
drawControls: function(ctx) {
if (!this.hasControls) return this;
var size = this.cornerSize,
size2 = size / 2,
strokeWidth2 = ~~(this.strokeWidth / 2), // half strokeWidth rounded down
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',
transparent = this.transparentCorners,
isVML = typeof G_vmlCanvasManager !== 'undefined';
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;
isVML || transparent || 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;
isVML || transparent || 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;
isVML || transparent || 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;
isVML || transparent || ctx.clearRect(_left, _top, sizeX, sizeY);
ctx[methodName](_left, _top, sizeX, sizeY);
if (!this.get('lockUniScaling')) {
// middle-top
_left = left + width/2 - scaleOffsetX;
_top = top - scaleOffsetY - strokeWidth2 - paddingY;
isVML || transparent || 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;
isVML || transparent || 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;
isVML || transparent || ctx.clearRect(_left, _top, sizeX, sizeY);
ctx[methodName](_left, _top, sizeX, sizeY);
// middle-left
_left = left - scaleOffsetX - strokeWidth2 - paddingX;
_top = top + height/2 - scaleOffsetY;
isVML || transparent || 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);
isVML || transparent || ctx.clearRect(_left, _top, sizeX, sizeY);
ctx[methodName](_left, _top, sizeX, sizeY);
}
ctx.restore();
return this;
}
});
})();
fabric.util.object.extend(fabric.StaticCanvas.prototype, /** @lends fabric.StaticCanvas.prototype */ {
/**
* Animation duration (in ms) for fx* methods
* @type Number
* @default
*/
FX_DURATION: 500,
/**
* Centers object horizontally with animation.
* @param {fabric.Object} object Object to center
* @param {Object} [callbacks] Callbacks object with optional "onComplete" and/or "onChange" properties
* @param {Function} [callbacks.onComplete] Invoked on completion
* @param {Function} [callbacks.onChange] Invoked on every step of animation
* @return {fabric.Canvas} thisArg
* @chainable
*/
fxCenterObjectH: function (object, callbacks) {
callbacks = callbacks || { };
var empty = function() { },
onComplete = callbacks.onComplete || empty,
onChange = callbacks.onChange || empty,
_this = this;
fabric.util.animate({
startValue: object.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.
* @param {fabric.Object} object Object to center
* @param {Object} [callbacks] Callbacks object with optional "onComplete" and/or "onChange" properties
* @param {Function} [callbacks.onComplete] Invoked on completion
* @param {Function} [callbacks.onChange] Invoked on every step of animation
* @return {fabric.Canvas} thisArg
* @chainable
*/
fxCenterObjectV: function (object, callbacks) {
callbacks = callbacks || { };
var empty = function() { },
onComplete = callbacks.onComplete || empty,
onChange = callbacks.onChange || empty,
_this = this;
fabric.util.animate({
startValue: object.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
* @param {fabric.Object} object Object to remove
* @param {Object} [callbacks] Callbacks object with optional "onComplete" and/or "onChange" properties
* @param {Function} [callbacks.onComplete] Invoked on completion
* @param {Function} [callbacks.onChange] Invoked on every step of animation
* @return {fabric.Canvas} thisArg
* @chainable
*/
fxRemove: function (object, callbacks) {
callbacks = callbacks || { };
var empty = function() { },
onComplete = callbacks.onComplete || empty,
onChange = callbacks.onChange || empty,
_this = this;
fabric.util.animate({
startValue: object.get('opacity'),
endValue: 0,
duration: this.FX_DURATION,
onStart: function() {
object.set('active', false);
},
onChange: function(value) {
object.set('opacity', value);
_this.renderAll();
onChange();
},
onComplete: function () {
_this.remove(object);
onComplete();
}
});
return this;
}
});
fabric.util.object.extend(fabric.Object.prototype, /** @lends fabric.Object.prototype */ {
/**
* Animates object's properties
* @param {String|Object} property to animate (if string) or properties to animate (if object)
* @param {Number|Object} value to animate property to (if string was given first) or options object
* @return {fabric.Object} thisArg
* @chainable
*
* As object — multiple properties
*
* object.animate({ left: ..., top: ... });
* object.animate({ left: ..., top: ... }, { duration: ... });
*
* As string — one property
*
* object.animate('left', ...);
* object.animate('left', { duration: ... });
*
*/
animate: function() {
if (arguments[0] && typeof arguments[0] === 'object') {
var propsToAnimate = [ ], prop, skipCallbacks;
for (prop in arguments[0]) {
propsToAnimate.push(prop);
}
for (var i = 0, len = propsToAnimate.length; i<len; i++) {
prop = propsToAnimate[i];
skipCallbacks = i !== len - 1;
this._animate(prop, arguments[0][prop], arguments[1], skipCallbacks);
}
}
else {
this._animate.apply(this, arguments);
}
return this;
},
/**
* @private
* @param {String} property Property to animate
* @param {String} to Value to animate to
* @param {Object} [options] Options object
* @param {Boolean} [skipCallbacks] When true, callbacks like onchange and oncomplete are not invoked
*/
_animate: function(property, to, options, skipCallbacks) {
var obj = this, propPair;
to = to.toString();
if (!options) {
options = { };
}
else {
options = fabric.util.object.clone(options);
}
if (~property.indexOf('.')) {
propPair = property.split('.');
}
var currentValue = propPair
? this.get(propPair[0])[propPair[1]]
: this.get(property);
if (!('from' in options)) {
options.from = currentValue;
}
if (~to.indexOf('=')) {
to = currentValue + parseFloat(to.replace('=', ''));
}
else {
to = parseFloat(to);
}
fabric.util.animate({
startValue: options.from,
endValue: to,
byValue: options.by,
easing: options.easing,
duration: options.duration,
abort: options.abort && function() {
return options.abort.call(obj);
},
onChange: function(value) {
if (propPair) {
obj[propPair[0]][propPair[1]] = value;
}
else {
obj.set(property, value);
}
if (skipCallbacks) return;
options.onChange && options.onChange();
},
onComplete: function() {
if (skipCallbacks) return;
obj.setCoords();
options.onComplete && options.onComplete();
}
});
}
});
(function(global) {
"use strict";
var fabric = global.fabric || (global.fabric = { }),
extend = fabric.util.object.extend,
coordProps = { 'x1': 1, 'x2': 1, 'y1': 1, 'y2': 1 },
supportsLineDash = fabric.StaticCanvas.supports('setLineDash');
if (fabric.Line) {
fabric.warn('fabric.Line is already defined');
return;
}
/**
* Line class
* @class fabric.Line
* @extends fabric.Object
*/
fabric.Line = fabric.util.createClass(fabric.Object, /** @lends fabric.Line.prototype */ {
/**
* Type of an object
* @type String
* @default
*/
type: 'line',
/**
* Constructor
* @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
* @param {Object} [options] Options
*/
_setWidthHeight: function(options) {
options || (options = { });
this.set('width', Math.abs(this.x2 - this.x1) || 1);
this.set('height', Math.abs(this.y2 - this.y1) || 1);
this.set('left', 'left' in options ? options.left : (Math.min(this.x1, this.x2) + this.width / 2));
this.set('top', 'top' in options ? options.top : (Math.min(this.y1, this.y2) + this.height / 2));
},
/**
* @private
* @param {String} key
* @param {Any} value
*/
_set: function(key, value) {
this[key] = value;
if (key in coordProps) {
this._setWidthHeight();
}
return this;
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_render: function(ctx) {
ctx.beginPath();
var isInPathGroup = this.group && this.group.type !== 'group';
if (isInPathGroup && !this.transformMatrix) {
ctx.translate(-this.group.width/2 + this.left, -this.group.height / 2 + this.top);
}
if (!this.strokeDashArray || this.strokeDashArray && supportsLineDash) {
// move from center (of virtual box) to its left/top corner
// we can't assume x1, y1 is top left and x2, y2 is bottom right
var xMult = this.x1 <= this.x2 ? -1 : 1;
var yMult = this.y1 <= this.y2 ? -1 : 1;
ctx.moveTo(
this.width === 1 ? 0 : (xMult * this.width / 2),
this.height === 1 ? 0 : (yMult * this.height / 2));
ctx.lineTo(
this.width === 1 ? 0 : (xMult * -1 * this.width / 2),
this.height === 1 ? 0 : (yMult * -1 * 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 = this.stroke || ctx.fillStyle;
this._renderStroke(ctx);
ctx.strokeStyle = origStrokeStyle;
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_renderDashedStroke: function(ctx) {
var
xMult = this.x1 <= this.x2 ? -1 : 1,
yMult = this.y1 <= this.y2 ? -1 : 1,
x = this.width === 1 ? 0 : xMult * this.width / 2,
y = this.height === 1 ? 0 : yMult * this.height / 2;
ctx.beginPath();
fabric.util.drawDashedLine(ctx, x, y, -x, -y, this.strokeDashArray);
ctx.closePath();
},
/**
* Returns object representation of an instance
* @methd toObject
* @param {Array} propertiesToInclude
* @return {Object} object representation of an instance
*/
toObject: function(propertiesToInclude) {
return extend(this.callSuper('toObject', propertiesToInclude), {
x1: this.get('x1'),
y1: this.get('y1'),
x2: this.get('x2'),
y2: this.get('y2')
});
},
/* _TO_SVG_START_ */
/**
* Returns SVG representation of an instance
* @return {String} svg representation of an instance
*/
toSVG: function() {
var markup = this._createBaseSVGMarkup();
markup.push(
'<line ',
'x1="', this.get('x1'),
'" y1="', this.get('y1'),
'" x2="', this.get('x2'),
'" y2="', this.get('y2'),
'" style="', this.getSvgStyles(),
'"/>'
);
return markup.join('');
},
/* _TO_SVG_END_ */
/**
* Returns complexity of an instance
* @return {Number} complexity
*/
complexity: function() {
return 1;
}
});
/* _FROM_SVG_START_ */
/**
* List of attribute names to account for when parsing SVG element (used by {@link fabric.Line.fromElement})
* @static
* @memberOf fabric.Line
* @see http://www.w3.org/TR/SVG/shapes.html#LineElement
*/
fabric.Line.ATTRIBUTE_NAMES = fabric.SHARED_ATTRIBUTES.concat('x1 y1 x2 y2'.split(' '));
/**
* Returns fabric.Line instance from an SVG element
* @static
* @memberOf fabric.Line
* @param {SVGElement} element Element to parse
* @param {Object} [options] Options object
* @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));
};
/* _FROM_SVG_END_ */
/**
* Returns fabric.Line instance from an object representation
* @static
* @memberOf fabric.Line
* @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;
}
/**
* Circle class
* @class fabric.Circle
* @extends fabric.Object
*/
fabric.Circle = fabric.util.createClass(fabric.Object, /** @lends fabric.Circle.prototype */ {
/**
* Type of an object
* @type String
* @default
*/
type: 'circle',
/**
* Constructor
* @param {Object} [options] Options object
* @return {fabric.Circle} thisArg
*/
initialize: function(options) {
options = options || { };
this.set('radius', options.radius || 0);
this.callSuper('initialize', options);
},
/**
* @private
* @param {String} key
* @param {Any} value
* @return {fabric.Circle} thisArg
*/
_set: function(key, value) {
this.callSuper('_set', key, value);
if (key === 'radius') {
this.setRadius(value);
}
return this;
},
/**
* Returns object representation of an instance
* @param {Array} propertiesToInclude
* @return {Object} object representation of an instance
*/
toObject: function(propertiesToInclude) {
return extend(this.callSuper('toObject', propertiesToInclude), {
radius: this.get('radius')
});
},
/* _TO_SVG_START_ */
/**
* Returns svg representation of an instance
* @return {String} svg representation of an instance
*/
toSVG: function() {
var markup = this._createBaseSVGMarkup();
markup.push(
'<circle ',
'cx="0" cy="0" ',
'r="', this.radius,
'" style="', this.getSvgStyles(),
'" transform="', this.getSvgTransform(),
'"/>'
);
return markup.join('');
},
/* _TO_SVG_END_ */
/**
* @private
* @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();
this._renderFill(ctx);
this._renderStroke(ctx);
},
/**
* Returns horizontal radius of an object (according to how an object is scaled)
* @return {Number}
*/
getRadiusX: function() {
return this.get('radius') * this.get('scaleX');
},
/**
* Returns vertical radius of an object (according to how an object is scaled)
* @return {Number}
*/
getRadiusY: function() {
return this.get('radius') * this.get('scaleY');
},
/**
* Sets radius of an object (and updates width accordingly)
* @return {Number}
*/
setRadius: function(value) {
this.radius = value;
this.set('width', value * 2).set('height', value * 2);
},
/**
* Returns complexity of an instance
* @return {Number} complexity of this instance
*/
complexity: function() {
return 1;
}
});
/* _FROM_SVG_START_ */
/**
* List of attribute names to account for when parsing SVG element (used by {@link fabric.Circle.fromElement})
* @static
* @memberOf fabric.Circle
* @see: http://www.w3.org/TR/SVG/shapes.html#CircleElement
*/
fabric.Circle.ATTRIBUTE_NAMES = fabric.SHARED_ATTRIBUTES.concat('cx cy r'.split(' '));
/**
* Returns {@link fabric.Circle} instance from an SVG element
* @static
* @memberOf fabric.Circle
* @param {SVGElement} element Element to parse
* @param {Object} [options] Options object
* @throws {Error} If value of `r` attribute is missing or invalid
* @return {fabric.Circle} 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;
}
var obj = new fabric.Circle(extend(parsedAttributes, options));
obj.cx = parseFloat(element.getAttribute('cx')) || 0;
obj.cy = parseFloat(element.getAttribute('cy')) || 0;
return obj;
};
/**
* @private
*/
function isValidRadius(attributes) {
return (('radius' in attributes) && (attributes.radius > 0));
}
/* _FROM_SVG_END_ */
/**
* Returns {@link fabric.Circle} instance from an object representation
* @static
* @memberOf fabric.Circle
* @param {Object} object Object to create an instance from
* @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;
}
/**
* Triangle class
* @class fabric.Triangle
* @extends fabric.Object
* @return {fabric.Triangle} thisArg
*/
fabric.Triangle = fabric.util.createClass(fabric.Object, /** @lends fabric.Triangle.prototype */ {
/**
* Type of an object
* @type String
* @default
*/
type: 'triangle',
/**
* Constructor
* @param {Object} [options] 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
* @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();
this._renderFill(ctx);
this._renderStroke(ctx);
},
/**
* @private
* @param ctx {CanvasRenderingContext2D} Context to render on
*/
_renderDashedStroke: function(ctx) {
var widthBy2 = this.width / 2,
heightBy2 = this.height / 2;
ctx.beginPath();
fabric.util.drawDashedLine(ctx, -widthBy2, heightBy2, 0, -heightBy2, this.strokeDashArray);
fabric.util.drawDashedLine(ctx, 0, -heightBy2, widthBy2, heightBy2, this.strokeDashArray);
fabric.util.drawDashedLine(ctx, widthBy2, heightBy2, -widthBy2, heightBy2, this.strokeDashArray);
ctx.closePath();
},
/* _TO_SVG_START_ */
/**
* Returns SVG representation of an instance
* @return {String} svg representation of an instance
*/
toSVG: function() {
var markup = this._createBaseSVGMarkup(),
widthBy2 = this.width / 2,
heightBy2 = this.height / 2;
var points = [
-widthBy2 + " " + heightBy2,
"0 " + -heightBy2,
widthBy2 + " " + heightBy2
].join(",");
markup.push(
'<polygon ',
'points="', points,
'" style="', this.getSvgStyles(),
'" transform="', this.getSvgTransform(),
'"/>'
);
return markup.join('');
},
/* _TO_SVG_END_ */
/**
* Returns complexity of an instance
* @return {Number} complexity of this instance
*/
complexity: function() {
return 1;
}
});
/**
* Returns fabric.Triangle instance from an object representation
* @static
* @memberOf fabric.Triangle
* @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;
}
/**
* Ellipse class
* @class fabric.Ellipse
* @extends fabric.Object
* @return {fabric.Ellipse} thisArg
*/
fabric.Ellipse = fabric.util.createClass(fabric.Object, /** @lends fabric.Ellipse.prototype */ {
/**
* Type of an object
* @type String
* @default
*/
type: 'ellipse',
/**
* Horizontal radius
* @type Number
* @default
*/
rx: 0,
/**
* Vertical radius
* @type Number
* @default
*/
ry: 0,
/**
* Constructor
* @param {Object} [options] Options object
* @return {fabric.Ellipse} 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
* @param {Array} propertiesToInclude
* @return {Object} object representation of an instance
*/
toObject: function(propertiesToInclude) {
return extend(this.callSuper('toObject', propertiesToInclude), {
rx: this.get('rx'),
ry: this.get('ry')
});
},
/* _TO_SVG_START_ */
/**
* Returns svg representation of an instance
* @return {String} svg representation of an instance
*/
toSVG: function() {
var markup = this._createBaseSVGMarkup();
markup.push(
'<ellipse ',
'rx="', this.get('rx'),
'" ry="', this.get('ry'),
'" style="', this.getSvgStyles(),
'" transform="', this.getSvgTransform(),
'"/>'
);
return markup.join('');
},
/* _TO_SVG_END_ */
/**
* Renders this instance on a given context
* @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
* @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);
this._renderFill(ctx);
this._renderStroke(ctx);
ctx.restore();
},
/**
* Returns complexity of an instance
* @return {Number} complexity
*/
complexity: function() {
return 1;
}
});
/* _FROM_SVG_START_ */
/**
* List of attribute names to account for when parsing SVG element (used by {@link fabric.Ellipse.fromElement})
* @static
* @memberOf fabric.Ellipse
* @see http://www.w3.org/TR/SVG/shapes.html#EllipseElement
*/
fabric.Ellipse.ATTRIBUTE_NAMES = fabric.SHARED_ATTRIBUTES.concat('cx cy rx ry'.split(' '));
/**
* Returns {@link fabric.Ellipse} instance from an SVG element
* @static
* @memberOf fabric.Ellipse
* @param {SVGElement} element Element to parse
* @param {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;
};
/* _FROM_SVG_END_ */
/**
* Returns {@link fabric.Ellipse} instance from an object representation
* @static
* @memberOf fabric.Ellipse
* @param {Object} object Object to create an instance from
* @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 = { }),
extend = fabric.util.object.extend;
if (fabric.Rect) {
console.warn('fabric.Rect is already defined');
return;
}
var stateProperties = fabric.Object.prototype.stateProperties.concat();
stateProperties.push('rx', 'ry');
/**
* Rectangle class
* @class fabric.Rect
* @extends fabric.Object
* @return {fabric.Rect} thisArg
*/
fabric.Rect = fabric.util.createClass(fabric.Object, /** @lends fabric.Rect.prototype */ {
/**
* List of properties to consider when checking if state of an object is changed ({@link fabric.Object#hasStateChanged})
* as well as for history (undo/redo) purposes
* @type Array
*/
stateProperties: stateProperties,
/**
* Type of an object
* @type String
* @default
*/
type: 'rect',
/**
* Horizontal border radius
* @type Number
* @default
*/
rx: 0,
/**
* Vertical border radius
* @type Number
* @default
*/
ry: 0,
/**
* Used to specify dash pattern for stroke on this object
* @type Array
*/
strokeDashArray: null,
/**
* Constructor
* @param {Object} [options] Options object
* @return {Object} thisArg
*/
initialize: function(options) {
options = options || { };
this.callSuper('initialize', options);
this._initRxRy();
this.x = options.x || 0;
this.y = options.y || 0;
},
/**
* Initializes rx/ry attributes
* @private
*/
_initRxRy: function() {
if (this.rx && !this.ry) {
this.ry = this.rx;
}
else if (this.ry && !this.rx) {
this.rx = this.ry;
}
},
/**
* @private
* @param 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,
isInPathGroup = this.group && this.group.type !== 'group';
ctx.beginPath();
ctx.globalAlpha = isInPathGroup ? (ctx.globalAlpha * this.opacity) : this.opacity;
if (this.transformMatrix && isInPathGroup) {
ctx.translate(
this.width / 2 + this.x,
this.height / 2 + this.y);
}
if (!this.transformMatrix && isInPathGroup) {
ctx.translate(
-this.group.width / 2 + this.width / 2 + this.x,
-this.group.height / 2 + this.height / 2 + this.y);
}
var isRounded = rx !== 0 || ry !== 0;
ctx.moveTo(x+rx, y);
ctx.lineTo(x+w-rx, y);
isRounded && ctx.quadraticCurveTo(x+w, y, x+w, y+ry, x+w, y+ry);
ctx.lineTo(x+w, y+h-ry);
isRounded && ctx.quadraticCurveTo(x+w,y+h,x+w-rx,y+h,x+w-rx,y+h);
ctx.lineTo(x+rx,y+h);
isRounded && ctx.quadraticCurveTo(x,y+h,x,y+h-ry,x,y+h-ry);
ctx.lineTo(x,y+ry);
isRounded && ctx.quadraticCurveTo(x,y,x+rx,y,x+rx,y);
ctx.closePath();
this._renderFill(ctx);
this._renderStroke(ctx);
},
/**
* @private
* @param ctx {CanvasRenderingContext2D} context to render on
*/
_renderDashedStroke: function(ctx) {
var x = -this.width/2,
y = -this.height/2,
w = this.width,
h = this.height;
ctx.beginPath();
fabric.util.drawDashedLine(ctx, x, y, x+w, y, this.strokeDashArray);
fabric.util.drawDashedLine(ctx, x+w, y, x+w, y+h, this.strokeDashArray);
fabric.util.drawDashedLine(ctx, x+w, y+h, x, y+h, this.strokeDashArray);
fabric.util.drawDashedLine(ctx, x, y+h, x, y, this.strokeDashArray);
ctx.closePath();
},
/**
* Since coordinate system differs from that of SVG
* @private
*/
_normalizeLeftTopProperties: function(parsedAttributes) {
if ('left' in parsedAttributes) {
this.set('left', parsedAttributes.left + this.getWidth() / 2);
}
this.set('x', parsedAttributes.left || 0);
if ('top' in parsedAttributes) {
this.set('top', parsedAttributes.top + this.getHeight() / 2);
}
this.set('y', parsedAttributes.top || 0);
return this;
},
/**
* Returns object representation of an instance
* @param {Array} propertiesToInclude
* @return {Object} object representation of an instance
*/
toObject: function(propertiesToInclude) {
return extend(this.callSuper('toObject', propertiesToInclude), {
rx: this.get('rx') || 0,
ry: this.get('ry') || 0,
x: this.get('x'),
y: this.get('y')
});
},
/* _TO_SVG_START_ */
/**
* Returns svg representation of an instance
* @return {String} svg representation of an instance
*/
toSVG: function() {
var markup = this._createBaseSVGMarkup();
markup.push(
'<rect ',
'x="', (-1 * this.width / 2), '" y="', (-1 * this.height / 2),
'" rx="', this.get('rx'), '" ry="', this.get('ry'),
'" width="', this.width, '" height="', this.height,
'" style="', this.getSvgStyles(),
'" transform="', this.getSvgTransform(),
'"/>'
);
return markup.join('');
},
/* _TO_SVG_END_ */
/**
* Returns complexity of an instance
* @return {Number} complexity
*/
complexity: function() {
return 1;
}
});
/* _FROM_SVG_START_ */
/**
* List of attribute names to account for when parsing SVG element (used by `fabric.Rect.fromElement`)
* @static
* @memberOf fabric.Rect
* @see: http://www.w3.org/TR/SVG/shapes.html#RectElement
*/
fabric.Rect.ATTRIBUTE_NAMES = fabric.SHARED_ATTRIBUTES.concat('x y rx ry width height'.split(' '));
/**
* @private
*/
function _setDefaultLeftTopValues(attributes) {
attributes.left = attributes.left || 0;
attributes.top = attributes.top || 0;
return attributes;
}
/**
* Returns {@link fabric.Rect} instance from an SVG element
* @static
* @memberOf fabric.Rect
* @param {SVGElement} element Element to parse
* @param {Object} [options] 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(extend((options ? fabric.util.object.clone(options) : { }), parsedAttributes));
rect._normalizeLeftTopProperties(parsedAttributes);
return rect;
};
/* _FROM_SVG_END_ */
/**
* Returns {@link fabric.Rect} instance from an object representation
* @static
* @memberOf fabric.Rect
* @param object {Object} object to create an instance from
* @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,
min = fabric.util.array.min;
if (fabric.Polyline) {
fabric.warn('fabric.Polyline is already defined');
return;
}
/**
* Polyline class
* @class fabric.Polyline
* @extends fabric.Object
*/
fabric.Polyline = fabric.util.createClass(fabric.Object, /** @lends fabric.Polyline.prototype */ {
/**
* Type of an object
* @type String
* @default
*/
type: 'polyline',
/**
* Constructor
* @param {Array} points Array of points
* @param {Object} [options] Options object
* @param {Boolean} [skipOffset] Whether points offsetting should be skipped
* @return {fabric.Polyline} thisArg
*/
initialize: function(points, options, skipOffset) {
options = options || { };
this.set('points', points);
this.callSuper('initialize', options);
this._calcDimensions(skipOffset);
},
/**
* @private
* @param {Boolean} [skipOffset] Whether points offsetting should be skipped
*/
_calcDimensions: function(skipOffset) {
return fabric.Polygon.prototype._calcDimensions.call(this, skipOffset);
},
/**
* Returns object representation of an instance
* @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output
* @return {Object} Object representation of an instance
*/
toObject: function(propertiesToInclude) {
return fabric.Polygon.prototype.toObject.call(this, propertiesToInclude);
},
/* _TO_SVG_START_ */
/**
* Returns SVG representation of an instance
* @return {String} svg representation of an instance
*/
toSVG: function() {
var points = [],
markup = this._createBaseSVGMarkup();
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), ' ');
}
markup.push(
'<polyline ',
'points="', points.join(''),
'" style="', this.getSvgStyles(),
'" transform="', this.getSvgTransform(),
'"/>'
);
return markup.join('');
},
/* _TO_SVG_END_ */
/**
* @private
* @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);
}
this._renderFill(ctx);
this._renderStroke(ctx);
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_renderDashedStroke: function(ctx) {
var p1, p2;
ctx.beginPath();
for (var i = 0, len = this.points.length; i < len; i++) {
p1 = this.points[i];
p2 = this.points[i+1] || p1;
fabric.util.drawDashedLine(ctx, p1.x, p1.y, p2.x, p2.y, this.strokeDashArray);
}
},
/**
* Returns complexity of an instance
* @return {Number} complexity of this instance
*/
complexity: function() {
return this.get('points').length;
}
});
/* _FROM_SVG_START_ */
/**
* List of attribute names to account for when parsing SVG element (used by {@link fabric.Polyline.fromElement})
* @static
* @memberOf fabric.Polyline
* @see: http://www.w3.org/TR/SVG/shapes.html#PolylineElement
*/
fabric.Polyline.ATTRIBUTE_NAMES = fabric.SHARED_ATTRIBUTES.concat();
/**
* Returns fabric.Polyline instance from an SVG element
* @static
* @memberOf fabric.Polyline
* @param {SVGElement} element Element to parse
* @param {Object} [options] Options object
* @return {fabric.Polyline} 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),
minX = min(points, 'x'),
minY = min(points, 'y');
minX = minX < 0 ? minX : 0;
minY = minX < 0 ? minY : 0;
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 + minX) || 0;
points[i].y -= (options.height / 2 + minY) || 0;
}
return new fabric.Polyline(points, fabric.util.object.extend(parsedAttributes, options), true);
};
/* _FROM_SVG_END_ */
/**
* Returns fabric.Polyline instance from an object representation
* @static
* @memberOf fabric.Polyline
* @param object {Object} object Object to create an instance from
* @return {fabric.Polyline} Instance of fabric.Polyline
*/
fabric.Polyline.fromObject = function(object) {
var points = object.points;
return new fabric.Polyline(points, object, true);
};
})(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;
}
/**
* Polygon class
* @class fabric.Polygon
* @extends fabric.Object
*/
fabric.Polygon = fabric.util.createClass(fabric.Object, /** @lends fabric.Polygon.prototype */ {
/**
* Type of an object
* @type String
* @default
*/
type: 'polygon',
/**
* Constructor
* @param {Array} points Array of points
* @param {Object} [options] Options object
* @param {Boolean} [skipOffset] Whether points offsetting should be skipped
* @return {fabric.Polygon} thisArg
*/
initialize: function(points, options, skipOffset) {
options = options || { };
this.points = points;
this.callSuper('initialize', options);
this._calcDimensions(skipOffset);
},
/**
* @private
* @param {Boolean} [skipOffset] Whether points offsetting should be skipped
*/
_calcDimensions: function(skipOffset) {
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;
if (skipOffset) return;
var halfWidth = this.width / 2 + this.minX,
halfHeight = this.height / 2 + this.minY;
// change points to offset polygon into a bounding box
this.points.forEach(function(p) {
p.x -= halfWidth;
p.y -= halfHeight;
}, this);
},
/**
* Returns object representation of an instance
* @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output
* @return {Object} Object representation of an instance
*/
toObject: function(propertiesToInclude) {
return extend(this.callSuper('toObject', propertiesToInclude), {
points: this.points.concat()
});
},
/* _TO_SVG_START_ */
/**
* Returns svg representation of an instance
* @return {String} svg representation of an instance
*/
toSVG: function() {
var points = [],
markup = this._createBaseSVGMarkup();
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), ' ');
}
markup.push(
'<polygon ',
'points="', points.join(''),
'" style="', this.getSvgStyles(),
'" transform="', this.getSvgTransform(),
'"/>'
);
return markup.join('');
},
/* _TO_SVG_END_ */
/**
* @private
* @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);
}
this._renderFill(ctx);
if (this.stroke || this.strokeDashArray) {
ctx.closePath();
this._renderStroke(ctx);
}
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_renderDashedStroke: function(ctx) {
var p1, p2;
ctx.beginPath();
for (var i = 0, len = this.points.length; i < len; i++) {
p1 = this.points[i];
p2 = this.points[i+1] || this.points[0];
fabric.util.drawDashedLine(ctx, p1.x, p1.y, p2.x, p2.y, this.strokeDashArray);
}
ctx.closePath();
},
/**
* Returns complexity of an instance
* @return {Number} complexity of this instance
*/
complexity: function() {
return this.points.length;
}
});
/* _FROM_SVG_START_ */
/**
* List of attribute names to account for when parsing SVG element (used by `fabric.Polygon.fromElement`)
* @static
* @memberOf fabric.Polygon
* @see: http://www.w3.org/TR/SVG/shapes.html#PolygonElement
*/
fabric.Polygon.ATTRIBUTE_NAMES = fabric.SHARED_ATTRIBUTES.concat();
/**
* Returns {@link fabric.Polygon} instance from an SVG element
* @static
* @memberOf fabric.Polygon
* @param {SVGElement} element Element to parse
* @param {Object} [options] Options object
* @return {fabric.Polygon} Instance of 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),
minX = min(points, 'x'),
minY = min(points, 'y');
minX = minX < 0 ? minX : 0;
minY = minX < 0 ? minY : 0;
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 + minX) || 0;
points[i].y -= (options.height / 2 + minY) || 0;
}
return new fabric.Polygon(points, extend(parsedAttributes, options), true);
};
/* _FROM_SVG_END_ */
/**
* Returns fabric.Polygon instance from an object representation
* @static
* @memberOf fabric.Polygon
* @param object {Object} object Object to create an instance from
* @return {fabric.Polygon} Instance of fabric.Polygon
*/
fabric.Polygon.fromObject = function(object) {
return new fabric.Polygon(object.points, object, true);
};
})(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
};
"use strict";
var fabric = global.fabric || (global.fabric = { }),
min = fabric.util.array.min,
max = fabric.util.array.max,
extend = fabric.util.object.extend,
_toString = Object.prototype.toString,
drawArc = fabric.util.drawArc;
if (fabric.Path) {
fabric.warn('fabric.Path is already defined');
return;
}
/**
* @private
*/
function getX(item) {
if (item[0] === 'H') {
return item[1];
}
return item[item.length - 2];
}
/**
* @private
*/
function getY(item) {
if (item[0] === 'V') {
return item[1];
}
return item[item.length - 1];
}
/**
* Path class
* @class fabric.Path
* @extends fabric.Object
*/
fabric.Path = fabric.util.createClass(fabric.Object, /** @lends fabric.Path.prototype */ {
/**
* Type of an object
* @type String
* @default
*/
type: 'path',
/**
* Constructor
* @param {Array|String} path Path data (sequence of coordinates and corresponding "command" tokens)
* @param {Object} [options] Options object
* @return {fabric.Path} thisArg
*/
initialize: function(path, options) {
options = options || { };
this.setOptions(options);
if (!path) {
throw new Error('`path` argument is required');
}
var fromArray = _toString.call(path) === '[object Array]';
this.path = fromArray
? path
// one of commands (m,M,l,L,q,Q,c,C,etc.) followed by non-command characters (i.e. command values)
: path.match && path.match(/[mzlhvcsqta][^mzlhvcsqta]*/gi);
if (!this.path) return;
if (!fromArray) {
this.path = this._parsePath();
}
this._initializePath(options);
if (options.sourcePath) {
this.setSourcePath(options.sourcePath);
}
},
/**
* @private
* @param {Object} [options] Options object
*/
_initializePath: function (options) {
var isWidthSet = 'width' in options && options.width != null,
isHeightSet = 'height' in options && options.width != null,
isLeftSet = 'left' in options,
isTopSet = 'top' in options,
origLeft = isLeftSet ? this.left : 0,
origTop = isTopSet ? this.top : 0;
if (!isWidthSet || !isHeightSet) {
extend(this, this._parseDimensions());
if (isWidthSet) {
this.width = options.width;
}
if (isHeightSet) {
this.height = options.height;
}
}
else { //Set center location relative to given height/width if not specified
if (!isTopSet) {
this.top = this.height / 2;
}
if (!isLeftSet) {
this.left = this.width / 2;
}
}
this.pathOffset = this.pathOffset || this._calculatePathOffset(origLeft, origTop); //Save top-left coords as offset
},
/**
* @private
* @param {Boolean} positionSet When false, path offset is returned otherwise 0
*/
_calculatePathOffset: function (origLeft, origTop) {
return {
x: this.left - origLeft - (this.width / 2),
y: this.top - origTop - (this.height / 2)
};
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx context to render path on
*/
_render: function(ctx) {
var current, // current instruction
previous = null,
x = 0, // current x
y = 0, // current y
controlX = 0, // current control point x
controlY = 0, // current control point y
tempX,
tempY,
tempControlX,
tempControlY,
l = -((this.width / 2) + this.pathOffset.x),
t = -((this.height / 2) + this.pathOffset.y);
for (var i = 0, len = this.path.length; i < len; ++i) {
current = this.path[i];
switch (current[0]) { // first letter
case 'l': // lineto, relative
x += current[1];
y += current[2];
ctx.lineTo(x + l, y + t);
break;
case 'L': // lineto, absolute
x = current[1];
y = current[2];
ctx.lineTo(x + l, y + t);
break;
case 'h': // horizontal lineto, relative
x += current[1];
ctx.lineTo(x + l, y + t);
break;
case 'H': // horizontal lineto, absolute
x = current[1];
ctx.lineTo(x + l, y + t);
break;
case 'v': // vertical lineto, relative
y += current[1];
ctx.lineTo(x + l, y + t);
break;
case 'V': // verical lineto, absolute
y = current[1];
ctx.lineTo(x + l, y + t);
break;
case 'm': // moveTo, relative
x += current[1];
y += current[2];
// draw a line if previous command was moveTo as well (otherwise, it will have no effect)
ctx[(previous && (previous[0] === 'm' || previous[0] === 'M')) ? 'lineTo' : 'moveTo'](x + l, y + t);
break;
case 'M': // moveTo, absolute
x = current[1];
y = current[2];
// draw a line if previous command was moveTo as well (otherwise, it will have no effect)
ctx[(previous && (previous[0] === 'm' || previous[0] === 'M')) ? 'lineTo' : 'moveTo'](x + l, y + t);
break;
case 'c': // bezierCurveTo, relative
tempX = x + current[5];
tempY = y + current[6];
controlX = x + current[3];
controlY = y + current[4];
ctx.bezierCurveTo(
x + current[1] + l, // x1
y + current[2] + t, // y1
controlX + l, // x2
controlY + t, // y2
tempX + l,
tempY + t
);
x = tempX;
y = tempY;
break;
case 'C': // bezierCurveTo, absolute
x = current[5];
y = current[6];
controlX = current[3];
controlY = current[4];
ctx.bezierCurveTo(
current[1] + l,
current[2] + t,
controlX + l,
controlY + t,
x + l,
y + t
);
break;
case 's': // shorthand cubic bezierCurveTo, relative
// transform to absolute x,y
tempX = x + current[3];
tempY = y + current[4];
// calculate reflection of previous control points
controlX = controlX ? (2 * x - controlX) : x;
controlY = controlY ? (2 * y - controlY) : y;
ctx.bezierCurveTo(
controlX + l,
controlY + t,
x + current[1] + l,
y + current[2] + t,
tempX + l,
tempY + t
);
// set control point to 2nd one of this command
// "... the first control point is assumed to be the reflection of the second control point on the previous command relative to the current point."
controlX = x + current[1];
controlY = y + current[2];
x = tempX;
y = tempY;
break;
case 'S': // shorthand cubic bezierCurveTo, absolute
tempX = current[3];
tempY = current[4];
// calculate reflection of previous control points
controlX = 2*x - controlX;
controlY = 2*y - controlY;
ctx.bezierCurveTo(
controlX + l,
controlY + t,
current[1] + l,
current[2] + t,
tempX + l,
tempY + t
);
x = tempX;
y = tempY;
// set control point to 2nd one of this command
// "... the first control point is assumed to be the reflection of the second control point on the previous command relative to the current point."
controlX = current[1];
controlY = current[2];
break;
case 'q': // quadraticCurveTo, relative
// transform to absolute x,y
tempX = x + current[3];
tempY = y + current[4];
controlX = x + current[1];
controlY = y + current[2];
ctx.quadraticCurveTo(
controlX + l,
controlY + t,
tempX + l,
tempY + t
);
x = tempX;
y = tempY;
break;
case 'Q': // quadraticCurveTo, absolute
tempX = current[3];
tempY = current[4];
ctx.quadraticCurveTo(
current[1] + l,
current[2] + t,
tempX + l,
tempY + t
);
x = tempX;
y = tempY;
controlX = current[1];
controlY = current[2];
break;
case 't': // shorthand quadraticCurveTo, relative
// transform to absolute x,y
tempX = x + current[1];
tempY = y + current[2];
if (previous[0].match(/[QqTt]/) === null) {
// If there is no previous command or if the previous command was not a Q, q, T or t,
// assume the control point is coincident with the current point
controlX = x;
controlY = y;
}
else if (previous[0] === 't') {
// calculate reflection of previous control points for t
controlX = 2 * x - tempControlX;
controlY = 2 * y - tempControlY;
}
else if (previous[0] === 'q') {
// calculate reflection of previous control points for q
controlX = 2 * x - controlX;
controlY = 2 * y - controlY;
}
tempControlX = controlX;
tempControlY = controlY;
ctx.quadraticCurveTo(
controlX + l,
controlY + t,
tempX + l,
tempY + t
);
x = tempX;
y = tempY;
controlX = x + current[1];
controlY = y + current[2];
break;
case 'T':
tempX = current[1];
tempY = current[2];
// calculate reflection of previous control points
controlX = 2 * x - controlX;
controlY = 2 * y - controlY;
ctx.quadraticCurveTo(
controlX + l,
controlY + t,
tempX + l,
tempY + t
);
x = tempX;
y = tempY;
break;
case 'a':
// TODO: optimize this
drawArc(ctx, x + l, y + t, [
current[1],
current[2],
current[3],
current[4],
current[5],
current[6] + x + l,
current[7] + y + t
]);
x += current[6];
y += current[7];
break;
case 'A':
// TODO: optimize this
drawArc(ctx, x + l, y + t, [
current[1],
current[2],
current[3],
current[4],
current[5],
current[6] + l,
current[7] + t
]);
x = current[6];
y = current[7];
break;
case 'z':
case 'Z':
ctx.closePath();
break;
}
previous = current;
}
},
/**
* Renders path on a specified context
* @param {CanvasRenderingContext2D} ctx context to render path on
* @param {Boolean} [noTransform] When true, context is not transformed
*/
render: function(ctx, noTransform) {
// do not render if object is not visible
if (!this.visible) return;
ctx.save();
var m = this.transformMatrix;
if (m) {
ctx.transform(m[0], m[1], m[2], m[3], m[4], m[5]);
}
if (!noTransform) {
this.transform(ctx);
}
// ctx.globalCompositeOperation = this.fillRule;
if (this.overlayFill) {
ctx.fillStyle = this.overlayFill;
}
else if (this.fill) {
ctx.fillStyle = this.fill.toLive
? this.fill.toLive(ctx)
: this.fill;
}
if (this.stroke) {
ctx.lineWidth = this.strokeWidth;
ctx.lineCap = this.strokeLineCap;
ctx.lineJoin = this.strokeLineJoin;
ctx.miterLimit = this.strokeMiterLimit;
ctx.strokeStyle = this.stroke.toLive
? this.stroke.toLive(ctx)
: this.stroke;
}
this._setShadow(ctx);
this.clipTo && fabric.util.clipContext(this, ctx);
ctx.beginPath();
this._render(ctx);
this._renderFill(ctx);
this._renderStroke(ctx);
this.clipTo && ctx.restore();
this._removeShadow(ctx);
if (!noTransform && this.active) {
this.drawBorders(ctx);
this.drawControls(ctx);
}
ctx.restore();
},
/**
* Returns string representation of an instance
* @return {String} string representation of an instance
*/
toString: function() {
return '#<fabric.Path (' + this.complexity() +
'): { "top": ' + this.top + ', "left": ' + this.left + ' }>';
},
/**
* Returns object representation of an instance
* @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output
* @return {Object} object representation of an instance
*/
toObject: function(propertiesToInclude) {
var o = extend(this.callSuper('toObject', propertiesToInclude), {
path: this.path,
pathOffset: this.pathOffset
});
if (this.sourcePath) {
o.sourcePath = this.sourcePath;
}
if (this.transformMatrix) {
o.transformMatrix = this.transformMatrix;
}
return o;
},
/**
* Returns dataless object representation of an instance
* @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output
* @return {Object} object representation of an instance
*/
toDatalessObject: function(propertiesToInclude) {
var o = this.toObject(propertiesToInclude);
if (this.sourcePath) {
o.path = this.sourcePath;
}
delete o.sourcePath;
return o;
},
/* _TO_SVG_START_ */
/**
* Returns svg representation of an instance
* @return {String} svg representation of an instance
*/
toSVG: function() {
var chunks = [],
markup = this._createBaseSVGMarkup();
for (var i = 0, len = this.path.length; i < len; i++) {
chunks.push(this.path[i].join(' '));
}
var path = chunks.join(' ');
markup.push(
'<g transform="', (this.group ? '' : this.getSvgTransform()), '">',
'<path ',
'd="', path,
'" style="', this.getSvgStyles(),
'" transform="translate(', (-this.width / 2), ' ', (-this.height/2), ')',
'" stroke-linecap="round" ',
'/>',
'</g>'
);
return markup.join('');
},
/* _TO_SVG_END_ */
/**
* Returns number representation of an instance complexity
* @return {Number} complexity of this instance
*/
complexity: function() {
return this.path.length;
},
/**
* @private
*/
_parsePath: function() {
var result = [ ],
coords = [ ],
currentPath,
parsed,
re = /(-?\.\d+)|(-?\d+(\.\d+)?)/g,
match,
coordsStr;
for (var i = 0, coordsParsed, len = this.path.length; i < len; i++) {
currentPath = this.path[i];
coordsStr = currentPath.slice(1).trim();
coords.length = 0;
while ((match = re.exec(coordsStr))) {
coords.push(match[0]);
}
coordsParsed = [ currentPath.charAt(0) ];
for (var j = 0, jlen = coords.length; j < jlen; j++) {
parsed = parseFloat(coords[j]);
if (!isNaN(parsed)) {
coordsParsed.push(parsed);
}
}
var command = coordsParsed[0].toLowerCase(),
commandLength = commandLengths[command];
if (coordsParsed.length - 1 > commandLength) {
for (var k = 1, klen = coordsParsed.length; k < klen; k += commandLength) {
result.push([ coordsParsed[0] ].concat(coordsParsed.slice(k, k + commandLength)));
}
}
else {
result.push(coordsParsed);
}
}
return result;
},
/**
* @private
*/
_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),
maxX = max(aX),
maxY = max(aY),
deltaX = maxX - minX,
deltaY = maxY - minY;
var o = {
left: this.left + (minX + deltaX / 2),
top: this.top + (minY + deltaY / 2),
width: deltaX,
height: deltaY
};
return o;
}
});
/**
* Creates an instance of fabric.Path from an object
* @static
* @memberOf fabric.Path
* @param {Object} object
* @param {Function} callback Callback to invoke when an fabric.Path instance is created
*/
fabric.Path.fromObject = function(object, callback) {
if (typeof object.path === 'string') {
fabric.loadSVGFromURL(object.path, function (elements) {
var path = elements[0];
var pathUrl = object.path;
delete object.path;
fabric.util.object.extend(path, object);
path.setSourcePath(pathUrl);
callback(path);
});
}
else {
callback(new fabric.Path(object.path, object));
}
};
/* _FROM_SVG_START_ */
/**
* List of attribute names to account for when parsing SVG element (used by `fabric.Path.fromElement`)
* @static
* @memberOf fabric.Path
* @see http://www.w3.org/TR/SVG/paths.html#PathElement
*/
fabric.Path.ATTRIBUTE_NAMES = fabric.SHARED_ATTRIBUTES.concat(['d']);
/**
* Creates an instance of fabric.Path from an SVG <path> element
* @static
* @memberOf fabric.Path
* @param {SVGElement} element to parse
* @param {Function} callback Callback to invoke when an fabric.Path instance is created
* @param {Object} [options] Options object
*/
fabric.Path.fromElement = function(element, callback, options) {
var parsedAttributes = fabric.parseAttributes(element, fabric.Path.ATTRIBUTE_NAMES);
callback && callback(new fabric.Path(parsedAttributes.d, extend(parsedAttributes, options)));
};
/* _FROM_SVG_END_ */
/**
* Indicates that instances of this type are async
* @static
* @memberOf fabric.Path
* @type Boolean
* @default
*/
fabric.Path.async = true;
})(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;
if (fabric.PathGroup) {
fabric.warn('fabric.PathGroup is already defined');
return;
}
/**
* Path group class
* @class fabric.PathGroup
* @extends fabric.Path
*/
fabric.PathGroup = fabric.util.createClass(fabric.Path, /** @lends fabric.PathGroup.prototype */ {
/**
* Type of an object
* @type String
* @default
*/
type: 'path-group',
/**
* Fill value
* @type String
* @default
*/
fill: '',
/**
* Constructor
* @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
* @param {CanvasRenderingContext2D} ctx Context to render this instance on
*/
render: function(ctx) {
// do not render if object is not visible
if (!this.visible) return;
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);
this._setShadow(ctx);
this.clipTo && fabric.util.clipContext(this, ctx);
for (var i = 0, l = this.paths.length; i < l; ++i) {
this.paths[i].render(ctx, true);
}
this.clipTo && ctx.restore();
this._removeShadow(ctx);
if (this.active) {
this.drawBorders(ctx);
this.drawControls(ctx);
}
ctx.restore();
},
/**
* Sets certain property to a certain value
* @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
* @param {Array} [propertiesToInclude]
* @return {Object} object representation of an instance
*/
toObject: function(propertiesToInclude) {
return extend(parentToObject.call(this, propertiesToInclude), {
paths: invoke(this.getObjects(), 'toObject', propertiesToInclude),
sourcePath: this.sourcePath
});
},
/**
* Returns dataless object representation of this path group
* @param {Array} [propertiesToInclude]
* @return {Object} dataless object representation of an instance
*/
toDatalessObject: function(propertiesToInclude) {
var o = this.toObject(propertiesToInclude);
if (this.sourcePath) {
o.paths = this.sourcePath;
}
return o;
},
/* _TO_SVG_START_ */
/**
* Returns svg representation of an instance
* @return {String} svg representation of an instance
*/
toSVG: function() {
var objects = this.getObjects();
var markup = [
'<g ',
'style="', this.getSvgStyles(), '" ',
'transform="', this.getSvgTransform(), '" ',
'>'
];
for (var i = 0, len = objects.length; i < len; i++) {
markup.push(objects[i].toSVG());
}
markup.push('</g>');
return markup.join('');
},
/* _TO_SVG_END_ */
/**
* Returns a string representation of this path group
* @return {String} string representation of an object
*/
toString: function() {
return '#<fabric.PathGroup (' + this.complexity() +
'): { top: ' + this.top + ', left: ' + this.left + ' }>';
},
/**
* Returns true if all paths in this group are of same color
* @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
* @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
* @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
* @return {Array} array of path objects included in this path group
*/
getObjects: function() {
return this.paths;
}
});
/**
* Creates fabric.PathGroup instance from an object representation
* @static
* @memberOf fabric.PathGroup
* @param {Object} object
* @param {Function} callback Callback to invoke when an fabric.PathGroup instance is created
*/
fabric.PathGroup.fromObject = function(object, callback) {
if (typeof object.paths === 'string') {
fabric.loadSVGFromURL(object.paths, function (elements) {
var pathUrl = object.paths;
delete object.paths;
var pathGroup = fabric.util.groupSVGElements(elements, object, pathUrl);
callback(pathGroup);
});
}
else {
fabric.util.enlivenObjects(object.paths, function(enlivenedObjects) {
delete object.paths;
callback(new fabric.PathGroup(enlivenedObjects, object));
});
}
};
/**
* Indicates that instances of this type are async
* @static
* @memberOf fabric.PathGroup
* @type Boolean
* @default
*/
fabric.PathGroup.async = true;
})(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;
if (fabric.Group) {
return;
}
// lock-related properties, for use in fabric.Group#get
// to enable locking behavior on group
// when one of its objects has lock-related properties set
var _lockProperties = {
lockMovementX: true,
lockMovementY: true,
lockRotation: true,
lockScalingX: true,
lockScalingY: true,
lockUniScaling: true
};
/**
* Group class
* @class fabric.Group
* @extends fabric.Object
* @mixes fabric.Collection
*/
fabric.Group = fabric.util.createClass(fabric.Object, fabric.Collection, /** @lends fabric.Group.prototype */ {
/**
* Type of an object
* @type String
* @default
*/
type: 'group',
/**
* Constructor
* @param {Object} objects Group objects
* @param {Object} [options] Options object
* @return {Object} thisArg
*/
initialize: function(objects, options) {
options = options || { };
this._objects = objects || [];
for (var i = this._objects.length; i--; ) {
this._objects[i].group = this;
}
this.originalState = { };
this.callSuper('initialize');
this._calcBounds();
this._updateObjectsCoords();
if (options) {
extend(this, options);
}
this._setOpacityIfSame();
this.setCoords(true);
this.saveCoords();
},
/**
* @private
*/
_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.__origHasControls = object.hasControls;
object.hasControls = false;
}, this);
},
/**
* Returns string represenation of a group
* @return {String}
*/
toString: function() {
return '#<fabric.Group: (' + this.complexity() + ')>';
},
/**
* Returns an array of all objects in this group
* @return {Array} group objects
*/
getObjects: function() {
return this._objects;
},
/**
* Adds an object to a group; Then recalculates group's dimension, position.
* @param {Object} object
* @return {fabric.Group} thisArg
* @chainable
*/
addWithUpdate: function(object) {
this._restoreObjectsState();
this._objects.push(object);
object.group = this;
// since _restoreObjectsState set objects inactive
this.forEachObject(function(o){ o.set('active', true); o.group = this; }, this);
this._calcBounds();
this._updateObjectsCoords();
return this;
},
/**
* Removes an object from a group; Then recalculates group's dimension, position.
* @param {Object} object
* @return {fabric.Group} thisArg
* @chainable
*/
removeWithUpdate: function(object) {
this._restoreObjectsState();
// since _restoreObjectsState set objects inactive
this.forEachObject(function(o){ o.set('active', true); o.group = this; }, this);
this.remove(object);
this._calcBounds();
this._updateObjectsCoords();
return this;
},
/**
* @private
*/
_onObjectAdded: function(object) {
object.group = this;
},
/**
* @private
*/
_onObjectRemoved: function(object) {
delete object.group;
object.set('active', false);
},
/**
* Properties that are delegated to group objects when reading/writing
* @param {Object} delegatedProperties
*/
delegatedProperties: {
fill: true,
opacity: true,
fontFamily: true,
fontWeight: true,
fontSize: true,
fontStyle: true,
lineHeight: true,
textDecoration: true,
textAlign: true,
backgroundColor: true
},
/**
* @private
*/
_set: function(key, value) {
if (key in this.delegatedProperties) {
var i = this._objects.length;
this[key] = value;
while (i--) {
this._objects[i].set(key, value);
}
}
else {
this[key] = value;
}
},
/**
* Returns object representation of an instance
* @param {Array} propertiesToInclude
* @return {Object} object representation of an instance
*/
toObject: function(propertiesToInclude) {
return extend(this.callSuper('toObject', propertiesToInclude), {
objects: invoke(this._objects, 'toObject', propertiesToInclude)
});
},
/**
* Renders instance on a given context
* @param {CanvasRenderingContext2D} ctx context to render instance on
* @param {Boolean} [noTransform] When true, context is not transformed
*/
render: function(ctx, noTransform) {
// do not render if object is not visible
if (!this.visible) return;
ctx.save();
this.transform(ctx);
var groupScaleFactor = Math.max(this.scaleX, this.scaleY);
this.clipTo && fabric.util.clipContext(this, ctx);
//The array is now sorted in order of highest first, so start from end.
for (var i = 0, len = this._objects.length; i < len; i++) {
var object = this._objects[i],
originalScaleFactor = object.borderScaleFactor,
originalHasRotatingPoint = object.hasRotatingPoint;
// do not render if object is not visible
if (!object.visible) continue;
object.borderScaleFactor = groupScaleFactor;
object.hasRotatingPoint = false;
object.render(ctx);
object.borderScaleFactor = originalScaleFactor;
object.hasRotatingPoint = originalHasRotatingPoint;
}
this.clipTo && ctx.restore();
if (!noTransform && this.active) {
this.drawBorders(ctx);
this.drawControls(ctx);
}
ctx.restore();
this.setCoords();
},
/**
* Retores original state of each of group objects (original state is that which was before group was created).
* @private
* @return {fabric.Group} thisArg
* @chainable
*/
_restoreObjectsState: function() {
this._objects.forEach(this._restoreObjectState, this);
return this;
},
/**
* Restores original state of a specified object in group
* @private
* @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') * this.get('scaleY') + Math.sin(groupAngle) * object.get('left') * this.get('scaleX'),
rotatedLeft = -Math.sin(groupAngle) * object.get('top') * this.get('scaleY') + Math.cos(groupAngle) * object.get('left') * this.get('scaleX');
object.setAngle(object.getAngle() + this.getAngle());
object.set('left', groupLeft + rotatedLeft);
object.set('top', groupTop + rotatedTop);
object.set('scaleX', object.get('scaleX') * this.get('scaleX'));
object.set('scaleY', object.get('scaleY') * this.get('scaleY'));
object.setCoords();
object.hasControls = object.__origHasControls;
delete object.__origHasControls;
object.set('active', false);
object.setCoords();
delete object.group;
return this;
},
/**
* Destroys a group (restoring state of its objects)
* @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)
* @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
* @return {fabric.Group} thisArg
* @chainable
*/
setObjectsCoords: function() {
this.forEachObject(function(object) {
object.setCoords();
});
return this;
},
/**
* @private
*/
_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
*/
_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;
},
/* _TO_SVG_START_ */
/**
* Returns svg representation of an instance
* @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 (
'<g transform="' + this.getSvgTransform() + '">' +
objectsMarkup.join('') +
'</g>');
},
/* _TO_SVG_END_ */
/**
* Returns requested property
* @param {String} prop Property to get
* @return {Any}
*/
get: function(prop) {
if (prop in _lockProperties) {
if (this[prop]) {
return this[prop];
}
else {
for (var i = 0, len = this._objects.length; i < len; i++) {
if (this._objects[i][prop]) {
return true;
}
}
return false;
}
}
else {
if (prop in this.delegatedProperties) {
return this._objects[0] && this._objects[0].get(prop);
}
return this[prop];
}
}
});
/**
* Returns {@link fabric.Group} instance from an object representation
* @static
* @memberOf fabric.Group
* @param {Object} object Object to create a group from
* @param {Object} [options] 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));
});
};
/**
* Indicates that instances of this type are async
* @static
* @memberOf fabric.Group
* @type Boolean
* @default
*/
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;
}
/**
* Image class
* @class fabric.Image
* @extends fabric.Object
*/
fabric.Image = fabric.util.createClass(fabric.Object, /** @lends fabric.Image.prototype */ {
/**
* Type of an object
* @type String
* @default
*/
type: 'image',
/**
* Constructor
* @param {HTMLImageElement | String} element Image element
* @param {Object} [options] Options object
* @return {fabric.Image} thisArg
*/
initialize: function(element, options) {
options || (options = { });
this.filters = [ ];
this.callSuper('initialize', options);
this._initElement(element);
this._initConfig(options);
if (options.filters) {
this.filters = options.filters;
this.applyFilters();
}
},
/**
* Returns image element which this instance if based on
* @return {HTMLImageElement} Image element
*/
getElement: function() {
return this._element;
},
/**
* Sets image element for this instance to a specified one.
* If filters defined they are applied to new image.
* You might need to call `canvas.renderAll` and `object.setCoords` after replacing, to render new image and update controls area.
* @param {HTMLImageElement} element
* @param {Function} [callback] Callback is invoked when all filters have been applied and new image is generated
* @return {fabric.Image} thisArg
* @chainable
*/
setElement: function(element, callback) {
this._element = element;
this._originalElement = element;
this._initConfig();
if (this.filters.length !== 0) {
this.applyFilters(callback);
}
return this;
},
/**
* Returns original size of an image
* @return {Object} Object with "width" and "height" properties
*/
getOriginalSize: function() {
var element = this.getElement();
return {
width: element.width,
height: element.height
};
},
/**
* Renders image on a specified context
* @param {CanvasRenderingContext2D} ctx Context to render on
* @param {Boolean} [noTransform] When true, context is not transformed
*/
render: function(ctx, noTransform) {
// do not render if object is not visible
if (!this.visible) return;
ctx.save();
var m = this.transformMatrix;
var isInPathGroup = this.group && this.group.type !== 'group';
// this._resetWidthHeight();
if (isInPathGroup) {
ctx.translate(-this.group.width/2 + this.width/2, -this.group.height/2 + this.height/2);
}
if (m) {
ctx.transform(m[0], m[1], m[2], m[3], m[4], m[5]);
}
if (!noTransform) {
this.transform(ctx);
}
ctx.save();
this._setShadow(ctx);
this.clipTo && fabric.util.clipContext(this, ctx);
this._render(ctx);
if (this.shadow && !this.shadow.affectStroke) {
this._removeShadow(ctx);
}
this._renderStroke(ctx);
this.clipTo && ctx.restore();
ctx.restore();
if (this.active && !noTransform) {
this.drawBorders(ctx);
this.drawControls(ctx);
}
ctx.restore();
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_stroke: function(ctx) {
ctx.save();
ctx.lineWidth = this.strokeWidth;
ctx.lineCap = this.strokeLineCap;
ctx.lineJoin = this.strokeLineJoin;
ctx.miterLimit = this.strokeMiterLimit;
ctx.strokeStyle = this.stroke.toLive
? this.stroke.toLive(ctx)
: this.stroke;
ctx.beginPath();
ctx.strokeRect(-this.width / 2, -this.height / 2, this.width, this.height);
ctx.closePath();
ctx.restore();
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_renderDashedStroke: function(ctx) {
var x = -this.width/2,
y = -this.height/2,
w = this.width,
h = this.height;
ctx.save();
ctx.lineWidth = this.strokeWidth;
ctx.lineCap = this.strokeLineCap;
ctx.lineJoin = this.strokeLineJoin;
ctx.miterLimit = this.strokeMiterLimit;
ctx.strokeStyle = this.stroke.toLive
? this.stroke.toLive(ctx)
: this.stroke;
ctx.beginPath();
fabric.util.drawDashedLine(ctx, x, y, x+w, y, this.strokeDashArray);
fabric.util.drawDashedLine(ctx, x+w, y, x+w, y+h, this.strokeDashArray);
fabric.util.drawDashedLine(ctx, x+w, y+h, x, y+h, this.strokeDashArray);
fabric.util.drawDashedLine(ctx, x, y+h, x, y, this.strokeDashArray);
ctx.closePath();
ctx.restore();
},
/**
* Returns object representation of an instance
* @param {Array} propertiesToInclude Any properties that you might want to additionally include in the output
* @return {Object} Object representation of an instance
*/
toObject: function(propertiesToInclude) {
return extend(this.callSuper('toObject', propertiesToInclude), {
src: this._originalElement.src || this._originalElement._src,
filters: this.filters.map(function(filterObj) {
return filterObj && filterObj.toObject();
})
});
},
/* _TO_SVG_START_ */
/**
* Returns SVG representation of an instance
* @return {String} svg representation of an instance
*/
toSVG: function() {
var markup = [];
markup.push(
'<g transform="', this.getSvgTransform(), '">',
'<image xlink:href="', this.getSvgSrc(),
'" style="', this.getSvgStyles(),
// we're essentially moving origin of transformation from top/left corner to the center of the shape
// by wrapping it in container <g> element with actual transformation, then offsetting object to the top/left
// so that object's center aligns with container's left/top
'" transform="translate(' + (-this.width/2) + ' ' + (-this.height/2) + ')',
'" width="', this.width,
'" height="', this.height,
'"></image>'
);
if (this.stroke || this.strokeDashArray) {
var origFill = this.fill;
this.fill = null;
markup.push(
'<rect ',
'x="', (-1 * this.width / 2), '" y="', (-1 * this.height / 2),
'" width="', this.width, '" height="', this.height,
'" style="', this.getSvgStyles(),
'"/>'
);
this.fill = origFill;
}
markup.push('</g>');
return markup.join('');
},
/* _TO_SVG_END_ */
/**
* Returns source of an image
* @return {String} Source of an image
*/
getSrc: function() {
return this.getElement().src || this.getElement()._src;
},
/**
* Returns string representation of an instance
* @return {String} String representation of an instance
*/
toString: function() {
return '#<fabric.Image: { src: "' + this.getSrc() + '" }>';
},
/**
* Returns a clone of an instance
* @param {Function} callback Callback is invoked with a clone as a first argument
* @param {Array} propertiesToInclude Any properties that you might want to additionally include in the output
*/
clone: function(callback, propertiesToInclude) {
this.constructor.fromObject(this.toObject(propertiesToInclude), 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
* @return {fabric.Image} thisArg
* @chainable
*/
applyFilters: function(callback) {
if (this.filters.length === 0) {
this._element = this._originalElement;
callback && callback();
return;
}
var imgEl = this._originalElement,
canvasEl = fabric.util.createCanvasElement(),
replacement = fabric.util.createImage(),
_this = this;
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.width = imgEl.width;
replacement.height = imgEl.height;
if (fabric.isLikelyNode) {
replacement.src = canvasEl.toBuffer(undefined, fabric.Image.pngCompression);
// onload doesn't fire in some node versions, so we invoke callback manually
_this._element = replacement;
callback && callback();
}
else {
replacement.onload = function() {
_this._element = replacement;
callback && callback();
replacement.onload = canvasEl = imgEl = null;
};
replacement.src = canvasEl.toDataURL('image/png');
}
return this;
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_render: function(ctx) {
ctx.drawImage(
this._element,
-this.width / 2,
-this.height / 2,
this.width,
this.height
);
},
/**
* @private
*/
_resetWidthHeight: function() {
var element = this.getElement();
this.set('width', element.width);
this.set('height', element.height);
},
/**
* The Image class's initialization method. This method is automatically
* called by the constructor.
* @private
* @param {HTMLImageElement|String} element The element representing the image
*/
_initElement: function(element) {
this.setElement(fabric.util.getById(element));
fabric.util.addClass(this.getElement(), fabric.Image.CSS_CANVAS);
},
/**
* @private
* @param {Object} [options] Options object
*/
_initConfig: function(options) {
options || (options = { });
this.setOptions(options);
this._setWidthHeight(options);
},
/**
* @private
* @param {Object} object Object with filters property
* @param {Function} callback Callback to invoke when all fabric.Image.filters instances are created
*/
_initFilters: function(object, callback) {
if (object.filters && object.filters.length) {
fabric.util.enlivenObjects(object.filters, function(enlivenedObjects) {
callback && callback(enlivenedObjects);
}, 'fabric.Image.filters');
}
else {
callback && callback();
}
},
/**
* @private
* @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);
},
/**
* Returns complexity of an instance
* @return {Number} complexity of this instance
*/
complexity: function() {
return 1;
}
});
/**
* Default CSS class name for canvas
* @static
* @type String
* @default
*/
fabric.Image.CSS_CANVAS = "canvas-img";
/**
* Alias for getSrc
* @static
*/
fabric.Image.prototype.getSvgSrc = fabric.Image.prototype.getSrc;
/**
* Creates an instance of fabric.Image from its object representation
* @static
* @param {Object} object Object to create an instance from
* @param {Function} [callback] Callback to invoke when an image instance is created
*/
fabric.Image.fromObject = function(object, callback) {
var img = fabric.document.createElement('img'),
src = object.src;
/** @ignore */
img.onload = function() {
fabric.Image.prototype._initFilters.call(object, object, function(filters) {
object.filters = filters || [ ];
var instance = new fabric.Image(img, object);
callback && callback(instance);
img = img.onload = img.onerror = null;
});
};
/** @ignore */
img.onerror = function() {
fabric.log('Error loading ' + img.src);
callback && callback(null, true);
img = img.onload = img.onerror = null;
};
img.src = src;
};
/**
* Creates an instance of fabric.Image from an URL string
* @static
* @param {String} url URL to create an image from
* @param {Function} [callback] Callback to invoke when image is created (newly created image is passed as a first argument)
* @param {Object} [imgOptions] Options object
*/
fabric.Image.fromURL = function(url, callback, imgOptions) {
fabric.util.loadImage(url, function(img) {
callback(new fabric.Image(img, imgOptions));
});
};
/* _FROM_SVG_START_ */
/**
* List of attribute names to account for when parsing SVG element (used by {@link fabric.Image.fromElement})
* @static
* @see {@link http://www.w3.org/TR/SVG/struct.html#ImageElement}
*/
fabric.Image.ATTRIBUTE_NAMES = fabric.SHARED_ATTRIBUTES.concat('x y width height xlink:href'.split(' '));
/**
* Returns {@link fabric.Image} instance from an SVG element
* @static
* @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} Instance of fabric.Image
*/
fabric.Image.fromElement = function(element, callback, options) {
var parsedAttributes = fabric.parseAttributes(element, fabric.Image.ATTRIBUTE_NAMES);
fabric.Image.fromURL(parsedAttributes['xlink:href'], callback,
extend((options ? fabric.util.object.clone(options) : { }), parsedAttributes));
};
/* _FROM_SVG_END_ */
/**
* Indicates that instances of this type are async
* @static
* @type Boolean
* @default
*/
fabric.Image.async = true;
/**
* Indicates compression level used when generating PNG under Node (in applyFilters). Any of 0-9
* @static
* @type Number
* @default
*/
fabric.Image.pngCompression = 1;
})(typeof exports !== 'undefined' ? exports : this);
fabric.util.object.extend(fabric.Object.prototype, /** @lends fabric.Object.prototype */ {
/**
* @private
* @return {Number} angle value
*/
_getAngleValueForStraighten: function() {
var angle = this.getAngle() % 360;
if (angle > 0) {
return Math.round((angle-1)/90) * 90;
}
return Math.round(angle/90) * 90;
},
/**
* Straightens an object (rotating it from current angle to one of 0, 90, 180, 270, etc. depending on which is closer)
* @return {fabric.Object} thisArg
* @chainable
*/
straighten: function() {
this.setAngle(this._getAngleValueForStraighten());
return this;
},
/**
* Same as {@link fabric.Object.prototype.straighten} but with animation
* @param {Object} callbacks Object with callback functions
* @param {Function} [callbacks.onComplete] Invoked on completion
* @param {Function} [callbacks.onChange] Invoked on every step of animation
* @return {fabric.Object} thisArg
* @chainable
*/
fxStraighten: function(callbacks) {
callbacks = callbacks || { };
var empty = function() { },
onComplete = callbacks.onComplete || empty,
onChange = callbacks.onChange || empty,
_this = this;
fabric.util.animate({
startValue: this.get('angle'),
endValue: this._getAngleValueForStraighten(),
duration: this.FX_DURATION,
onChange: function(value) {
_this.setAngle(value);
onChange();
},
onComplete: function() {
_this.setCoords();
onComplete();
},
onStart: function() {
_this.set('active', false);
}
});
return this;
}
});
fabric.util.object.extend(fabric.StaticCanvas.prototype, /** @lends fabric.StaticCanvas.prototype */ {
/**
* Straightens object, then rerenders canvas
* @param {fabric.Object} object Object to straighten
* @return {fabric.Canvas} thisArg
* @chainable
*/
straightenObject: function (object) {
object.straighten();
this.renderAll();
return this;
},
/**
* Same as {@link fabric.Canvas.prototype.straightenObject}, but animated
* @param {fabric.Object} object Object to straighten
* @return {fabric.Canvas} thisArg
* @chainable
*/
fxStraightenObject: function (object) {
object.fxStraighten({
onChange: this.renderAll.bind(this)
});
return this;
}
});
/**
* @namespace fabric.Image.filters
* @memberOf fabric.Image
*/
fabric.Image.filters = fabric.Image.filters || { };
/**
* Root filter class from which all filter classes inherit from
* @class fabric.Image.filters.BaseFilter
* @memberOf fabric.Image.filters
*/
fabric.Image.filters.BaseFilter = fabric.util.createClass(/** @lends fabric.Image.filters.BaseFilter.prototype */ {
/**
* Filter type
* @param {String} type
* @default
*/
type: 'BaseFilter',
/**
* Returns object representation of an instance
* @return {Object} Object representation of an instance
*/
toObject: function() {
return { type: this.type };
},
/**
* Returns a JSON representation of an instance
* @return {Object} JSON
*/
toJSON: function() {
// delegate, not alias
return this.toObject();
}
});
(function(global) {
"use strict";
var fabric = global.fabric || (global.fabric = { }),
extend = fabric.util.object.extend;
/**
* Brightness filter class
* @class fabric.Image.filters.Brightness
* @memberOf fabric.Image.filters
* @extends fabric.Image.filters.BaseFilter
*/
fabric.Image.filters.Brightness = fabric.util.createClass(fabric.Image.filters.BaseFilter, /** @lends fabric.Image.filters.Brightness.prototype */ {
/**
* Filter type
* @param {String} type
* @default
*/
type: 'Brightness',
/**
* Constructor
* @memberOf fabric.Image.filters.Brightness.prototype
* @param {Object} [options] Options object
*/
initialize: function(options) {
options = options || { };
this.brightness = options.brightness || 100;
},
/**
* Applies filter to canvas element
* @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);
},
/**
* Returns object representation of an instance
* @return {Object} Object representation of an instance
*/
toObject: function() {
return extend(this.callSuper('toObject'), {
brightness: this.brightness
});
}
});
/**
* Returns filter instance from an object representation
* @static
* @param {Object} object Object to create an instance from
* @return {fabric.Image.filters.Brightness} Instance of fabric.Image.filters.Brightness
*/
fabric.Image.filters.Brightness.fromObject = function(object) {
return new fabric.Image.filters.Brightness(object);
};
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
"use strict";
var fabric = global.fabric || (global.fabric = { }),
extend = fabric.util.object.extend;
/**
* Adapted from <a href="http://www.html5rocks.com/en/tutorials/canvas/imagefilters/">html5rocks article</a>
* @class fabric.Image.filters.Convolute
* @memberOf fabric.Image.filters
* @extends fabric.Image.filters.BaseFilter
*/
fabric.Image.filters.Convolute = fabric.util.createClass(fabric.Image.filters.BaseFilter, /** @lends fabric.Image.filters.Convolute.prototype */ {
/**
* Filter type
* @param {String} type
* @default
*/
type: 'Convolute',
/**
* Constructor
* @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 ];
var canvasEl = fabric.util.createCanvasElement();
this.tmpCtx = canvasEl.getContext('2d');
},
/**
* @private
*/
_createImageData: function(w, h) {
return this.tmpCtx.createImageData(w, h);
},
/**
* Applies filter to canvas element
* @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<h; y++) {
for (var x=0; x<w; x++) {
var sy = y;
var sx = x;
var dstOff = (y*w+x)*4;
// calculate the weighed sum of the source image pixels that
// fall under the convolution matrix
var r=0, g=0, b=0, a=0;
for (var cy=0; cy<side; cy++) {
for (var cx=0; cx<side; cx++) {
var scy = sy + cy - halfSide;
var scx = sx + cx - halfSide;
if (scy >= 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);
},
/**
* Returns object representation of an instance
* @return {Object} Object representation of an instance
*/
toObject: function() {
return extend(this.callSuper('toObject'), {
opaque: this.opaque,
matrix: this.matrix
});
}
});
/**
* Returns filter instance from an object representation
* @static
* @param {Object} object Object to create an instance from
* @return {fabric.Image.filters.Convolute} Instance of fabric.Image.filters.Convolute
*/
fabric.Image.filters.Convolute.fromObject = function(object) {
return new fabric.Image.filters.Convolute(object);
};
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
"use strict";
var fabric = global.fabric || (global.fabric = { }),
extend = fabric.util.object.extend;
/**
* GradientTransparency filter class
* @class fabric.Image.filters.GradientTransparency
* @memberOf fabric.Image.filters
* @extends fabric.Image.filters.BaseFilter
*/
fabric.Image.filters.GradientTransparency = fabric.util.createClass(fabric.Image.filters.BaseFilter, /** @lends fabric.Image.filters.GradientTransparency.prototype */ {
/**
* Filter type
* @param {String} type
* @default
*/
type: 'GradientTransparency',
/**
* Constructor
* @memberOf fabric.Image.filters.GradientTransparency
* @param {Object} [options] Options object
*/
initialize: function(options) {
options = options || { };
this.threshold = options.threshold || 100;
},
/**
* Applies filter to canvas element
* @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);
},
/**
* Returns object representation of an instance
* @return {Object} Object representation of an instance
*/
toObject: function() {
return extend(this.callSuper('toObject'), {
threshold: this.threshold
});
}
});
/**
* Returns filter instance from an object representation
* @static
* @param {Object} object Object to create an instance from
* @return {fabric.Image.filters.GradientTransparency} Instance of fabric.Image.filters.GradientTransparency
*/
fabric.Image.filters.GradientTransparency.fromObject = function(object) {
return new fabric.Image.filters.GradientTransparency(object);
};
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
"use strict";
var fabric = global.fabric || (global.fabric = { });
/**
* Grayscale image filter class
* @class fabric.Image.filters.Grayscale
* @memberOf fabric.Image.filters
* @extends fabric.Image.filters.BaseFilter
*/
fabric.Image.filters.Grayscale = fabric.util.createClass(fabric.Image.filters.BaseFilter, /** @lends fabric.Image.filters.Grayscale.prototype */ {
/**
* Filter type
* @param {String} type
* @default
*/
type: 'Grayscale',
/**
* Applies filter to canvas element
* @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,
len = imageData.width * imageData.height * 4,
index = 0,
average;
while (index < len) {
average = (data[index] + data[index + 1] + data[index + 2]) / 3;
data[index] = average;
data[index + 1] = average;
data[index + 2] = average;
index += 4;
}
context.putImageData(imageData, 0, 0);
}
});
/**
* Returns filter instance from an object representation
* @static
* @return {fabric.Image.filters.Grayscale} Instance of fabric.Image.filters.Grayscale
*/
fabric.Image.filters.Grayscale.fromObject = function() {
return new fabric.Image.filters.Grayscale();
};
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
"use strict";
var fabric = global.fabric || (global.fabric = { });
/**
* Invert filter class
* @class fabric.Image.filters.Invert
* @memberOf fabric.Image.filters
* @extends fabric.Image.filters.BaseFilter
*/
fabric.Image.filters.Invert = fabric.util.createClass(fabric.Image.filters.BaseFilter, /** @lends fabric.Image.filters.Invert.prototype */ {
/**
* Filter type
* @param {String} type
* @default
*/
type: 'Invert',
/**
* Applies filter to canvas element
* @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);
}
});
/**
* Returns filter instance from an object representation
* @static
* @return {fabric.Image.filters.Invert} Instance of fabric.Image.filters.Invert
*/
fabric.Image.filters.Invert.fromObject = function() {
return new fabric.Image.filters.Invert();
};
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
"use strict";
var fabric = global.fabric || (global.fabric = { }),
extend = fabric.util.object.extend;
/**
* Mask filter class
* @class fabric.Image.filters.Mask
* @memberOf fabric.Image.filters
* @extends fabric.Image.filters.BaseFilter
*/
fabric.Image.filters.Mask = fabric.util.createClass(fabric.Image.filters.BaseFilter, /** @lends fabric.Image.filters.Mask.prototype */ {
/**
* Filter type
* @param {String} type
* @default
*/
type: 'Mask',
/**
* Constructor
* @memberOf fabric.Image.filters.Mask.prototype
* @param {Object} [options] Options object
*/
initialize: function(options) {
options = options || { };
this.mask = options.mask;
this.channel = [ 0, 1, 2, 3 ].indexOf(options.channel) > -1 ? options.channel : 0;
},
/**
* Applies filter to canvas element
* @param {Object} canvasEl Canvas element to apply filter to
*/
applyTo: function(canvasEl) {
if (!this.mask) return;
var context = canvasEl.getContext('2d'),
imageData = context.getImageData(0, 0, canvasEl.width, canvasEl.height),
data = imageData.data,
maskEl = this.mask.getElement(),
maskCanvasEl = fabric.util.createCanvasElement(),
channel = this.channel,
i,
iLen = imageData.width * imageData.height * 4;
maskCanvasEl.width = maskEl.width;
maskCanvasEl.height = maskEl.height;
maskCanvasEl.getContext('2d').drawImage(maskEl, 0, 0, maskEl.width, maskEl.height);
var maskImageData = maskCanvasEl.getContext('2d').getImageData(0, 0, maskEl.width, maskEl.height),
maskData = maskImageData.data;
for (i = 0; i < iLen; i += 4) {
data[i + 3] = maskData[i + channel];
}
context.putImageData(imageData, 0, 0);
},
/**
* Returns object representation of an instance
* @return {Object} Object representation of an instance
*/
toObject: function() {
return extend(this.callSuper('toObject'), {
mask: this.mask.toObject(),
channel: this.channel
});
}
});
/**
* Returns filter instance from an object representation
* @static
* @param {Object} object Object to create an instance from
* @param {Function} [callback] Callback to invoke when a mask filter instance is created
*/
fabric.Image.filters.Mask.fromObject = function(object, callback) {
var img = fabric.document.createElement('img'),
src = object.mask.src;
/** @ignore */
img.onload = function() {
object.mask = new fabric.Image(img, object.mask);
callback && callback(new fabric.Image.filters.Mask(object));
img = img.onload = img.onerror = null;
};
/** @ignore */
img.onerror = function() {
fabric.log('Error loading ' + img.src);
callback && callback(null, true);
img = img.onload = img.onerror = null;
};
img.src = src;
};
/**
* Indicates that instances of this type are async
* @static
* @type Boolean
* @default
*/
fabric.Image.filters.Mask.async = true;
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
"use strict";
var fabric = global.fabric || (global.fabric = { }),
extend = fabric.util.object.extend;
/**
* Noise filter class
* @class fabric.Image.filters.Noise
* @memberOf fabric.Image.filters
* @extends fabric.Image.filters.BaseFilter
*/
fabric.Image.filters.Noise = fabric.util.createClass(fabric.Image.filters.BaseFilter, /** @lends fabric.Image.filters.Noise.prototype */ {
/**
* Filter type
* @param {String} type
* @default
*/
type: 'Noise',
/**
* Constructor
* @memberOf fabric.Image.filters.Noise.prototype
* @param {Object} [options] Options object
*/
initialize: function(options) {
options = options || { };
this.noise = options.noise || 100;
},
/**
* Applies filter to canvas element
* @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);
},
/**
* Returns object representation of an instance
* @return {Object} Object representation of an instance
*/
toObject: function() {
return extend(this.callSuper('toObject'), {
noise: this.noise
});
}
});
/**
* Returns filter instance from an object representation
* @static
* @param {Object} object Object to create an instance from
* @return {fabric.Image.filters.Noise} Instance of fabric.Image.filters.Noise
*/
fabric.Image.filters.Noise.fromObject = function(object) {
return new fabric.Image.filters.Noise(object);
};
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
"use strict";
var fabric = global.fabric || (global.fabric = { }),
extend = fabric.util.object.extend;
/**
* Pixelate filter class
* @class fabric.Image.filters.Pixelate
* @memberOf fabric.Image.filters
* @extends fabric.Image.filters.BaseFilter
*/
fabric.Image.filters.Pixelate = fabric.util.createClass(fabric.Image.filters.BaseFilter, /** @lends fabric.Image.filters.Pixelate.prototype */ {
/**
* Filter type
* @param {String} type
* @default
*/
type: 'Pixelate',
/**
* Constructor
* @memberOf fabric.Image.filters.Pixelate.prototype
* @param {Object} [options] Options object
*/
initialize: function(options) {
options = options || { };
this.blocksize = options.blocksize || 4;
},
/**
* Applies filter to canvas element
* @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.height,
jLen = imageData.width,
index, i, j, 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);
},
/**
* Returns object representation of an instance
* @return {Object} Object representation of an instance
*/
toObject: function() {
return extend(this.callSuper('toObject'), {
blocksize: this.blocksize
});
}
});
/**
* Returns filter instance from an object representation
* @static
* @param {Object} object Object to create an instance from
* @return {fabric.Image.filters.Pixelate} Instance of fabric.Image.filters.Pixelate
*/
fabric.Image.filters.Pixelate.fromObject = function(object) {
return new fabric.Image.filters.Pixelate(object);
};
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
"use strict";
var fabric = global.fabric || (global.fabric = { }),
extend = fabric.util.object.extend;
/**
* Remove white filter class
* @class fabric.Image.filters.RemoveWhite
* @memberOf fabric.Image.filters
* @extends fabric.Image.filters.BaseFilter
*/
fabric.Image.filters.RemoveWhite = fabric.util.createClass(fabric.Image.filters.BaseFilter, /** @lends fabric.Image.filters.RemoveWhite.prototype */ {
/**
* Filter type
* @param {String} type
* @default
*/
type: 'RemoveWhite',
/**
* Constructor
* @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;
},
/**
* Applies filter to canvas element
* @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);
},
/**
* Returns object representation of an instance
* @return {Object} Object representation of an instance
*/
toObject: function() {
return extend(this.callSuper('toObject'), {
threshold: this.threshold,
distance: this.distance
});
}
});
/**
* Returns filter instance from an object representation
* @static
* @param {Object} object Object to create an instance from
* @return {fabric.Image.filters.RemoveWhite} Instance of fabric.Image.filters.RemoveWhite
*/
fabric.Image.filters.RemoveWhite.fromObject = function(object) {
return new fabric.Image.filters.RemoveWhite(object);
};
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
"use strict";
var fabric = global.fabric || (global.fabric = { });
/**
* Sepia filter class
* @class fabric.Image.filters.Sepia
* @memberOf fabric.Image.filters
* @extends fabric.Image.filters.BaseFilter
*/
fabric.Image.filters.Sepia = fabric.util.createClass(fabric.Image.filters.BaseFilter, /** @lends fabric.Image.filters.Sepia.prototype */ {
/**
* Filter type
* @param {String} type
* @default
*/
type: 'Sepia',
/**
* Applies filter to canvas element
* @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);
}
});
/**
* Returns filter instance from an object representation
* @static
* @return {fabric.Image.filters.Sepia} Instance of fabric.Image.filters.Sepia
*/
fabric.Image.filters.Sepia.fromObject = function() {
return new fabric.Image.filters.Sepia();
};
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
"use strict";
var fabric = global.fabric || (global.fabric = { });
/**
* Sepia2 filter class
* @class fabric.Image.filters.Sepia2
* @memberOf fabric.Image.filters
* @extends fabric.Image.filters.BaseFilter
*/
fabric.Image.filters.Sepia2 = fabric.util.createClass(fabric.Image.filters.BaseFilter, /** @lends fabric.Image.filters.Sepia2.prototype */ {
/**
* Filter type
* @param {String} type
* @default
*/
type: 'Sepia2',
/**
* Applies filter to canvas element
* @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);
}
});
/**
* Returns filter instance from an object representation
* @static
* @return {fabric.Image.filters.Sepia2} Instance of fabric.Image.filters.Sepia2
*/
fabric.Image.filters.Sepia2.fromObject = function() {
return new fabric.Image.filters.Sepia2();
};
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
"use strict";
var fabric = global.fabric || (global.fabric = { }),
extend = fabric.util.object.extend;
/**
* Tint filter class
* @class fabric.Image.filters.Tint
* @memberOf fabric.Image.filters
* @extends fabric.Image.filters.BaseFilter
*/
fabric.Image.filters.Tint = fabric.util.createClass(fabric.Image.filters.BaseFilter, /** @lends fabric.Image.filters.Tint.prototype */ {
/**
* Filter type
* @param {String} type
* @default
*/
type: 'Tint',
/**
* Constructor
* @memberOf fabric.Image.filters.Tint.prototype
* @param {Object} [options] Options object
*/
initialize: function(options) {
options = options || { };
this.color = options.color || 0;
},
/**
* Applies filter to canvas element
* @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);
// Pad with leading zeros that may have been stripped off in conversion.
while (rgb.length < 6) rgb = '0' + rgb;
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);
},
/**
* Returns object representation of an instance
* @return {Object} Object representation of an instance
*/
toObject: function() {
return extend(this.callSuper('toObject'), {
color: this.color
});
}
});
/**
* Returns filter instance from an object representation
* @static
* @param {Object} object Object to create an instance from
* @return {fabric.Image.filters.Tint} Instance of fabric.Image.filters.Tint
*/
fabric.Image.filters.Tint.fromObject = function(object) {
return new fabric.Image.filters.Tint(object);
};
})(typeof exports !== 'undefined' ? exports : this);
(function(global) {
"use strict";
var fabric = global.fabric || (global.fabric = { }),
extend = fabric.util.object.extend,
clone = fabric.util.object.clone,
toFixed = fabric.util.toFixed,
supportsLineDash = fabric.StaticCanvas.supports('setLineDash');
if (fabric.Text) {
fabric.warn('fabric.Text is already defined');
return;
}
var stateProperties = fabric.Object.prototype.stateProperties.concat();
stateProperties.push(
'fontFamily',
'fontWeight',
'fontSize',
'text',
'textDecoration',
'textAlign',
'fontStyle',
'lineHeight',
'backgroundColor',
'textBackgroundColor',
'useNative',
'path'
);
/**
* Text class
* @class fabric.Text
* @extends fabric.Object
* @return {fabric.Text} thisArg
*/
fabric.Text = fabric.util.createClass(fabric.Object, /** @lends fabric.Text.prototype */ {
/**
* Properties which when set cause object to change dimensions
* @type Object
* @private
*/
_dimensionAffectingProps: {
fontSize: true,
fontWeight: true,
fontFamily: true,
textDecoration: true,
fontStyle: true,
lineHeight: true,
stroke: true,
strokeWidth: true,
text: true
},
/**
* Retrieves object's fontSize
* @method getFontSize
* @memberOf fabric.Text.prototype
* @return {String} Font size (in pixels)
*/
/**
* Sets object's fontSize
* @method setFontSize
* @memberOf fabric.Text.prototype
* @param {Number} fontSize Font size (in pixels)
* @return {fabric.Text}
* @chainable
*/
/**
* Retrieves object's fontWeight
* @method getFontWeight
* @memberOf fabric.Text.prototype
* @return {(String|Number)} Font weight
*/
/**
* Sets object's fontWeight
* @method setFontWeight
* @memberOf fabric.Text.prototype
* @param {(Number|String)} fontWeight Font weight
* @return {fabric.Text}
* @chainable
*/
/**
* Retrieves object's fontFamily
* @method getFontFamily
* @memberOf fabric.Text.prototype
* @return {String} Font family
*/
/**
* Sets object's fontFamily
* @method setFontFamily
* @memberOf fabric.Text.prototype
* @param {String} fontFamily Font family
* @return {fabric.Text}
* @chainable
*/
/**
* Retrieves object's text
* @method getText
* @memberOf fabric.Text.prototype
* @return {String} text
*/
/**
* Sets object's text
* @method setText
* @memberOf fabric.Text.prototype
* @param {String} text Text
* @return {fabric.Text}
* @chainable
*/
/**
* Retrieves object's textDecoration
* @method getTextDecoration
* @memberOf fabric.Text.prototype
* @return {String} Text decoration
*/
/**
* Sets object's textDecoration
* @method setTextDecoration
* @memberOf fabric.Text.prototype
* @param {String} textDecoration Text decoration
* @return {fabric.Text}
* @chainable
*/
/**
* Retrieves object's fontStyle
* @method getFontStyle
* @memberOf fabric.Text.prototype
* @return {String} Font style
*/
/**
* Sets object's fontStyle
* @method setFontStyle
* @memberOf fabric.Text.prototype
* @param {String} fontStyle Font style
* @return {fabric.Text}
* @chainable
*/
/**
* Retrieves object's lineHeight
* @method getLineHeight
* @memberOf fabric.Text.prototype
* @return {Number} Line height
*/
/**
* Sets object's lineHeight
* @method setLineHeight
* @memberOf fabric.Text.prototype
* @param {Number} lineHeight Line height
* @return {fabric.Text}
* @chainable
*/
/**
* Retrieves object's textAlign
* @method getTextAlign
* @memberOf fabric.Text.prototype
* @return {String} Text alignment
*/
/**
* Sets object's textAlign
* @method setTextAlign
* @memberOf fabric.Text.prototype
* @param {String} textAlign Text alignment
* @return {fabric.Text}
* @chainable
*/
/**
* Retrieves object's textBackgroundColor
* @method getTextBackgroundColor
* @memberOf fabric.Text.prototype
* @return {String} Text background color
*/
/**
* Sets object's textBackgroundColor
* @method setTextBackgroundColor
* @memberOf fabric.Text.prototype
* @param {String} textBackgroundColor Text background color
* @return {fabric.Text}
* @chainable
*/
/**
* Type of an object
* @type String
* @default
*/
type: 'text',
/**
* Font size (in pixels)
* @type Number
* @default
*/
fontSize: 40,
/**
* Font weight (e.g. bold, normal, 400, 600, 800)
* @type {(Number|String)}
* @default
*/
fontWeight: 'normal',
/**
* Font family
* @type String
* @default
*/
fontFamily: 'Times New Roman',
/**
* Text decoration Possible values: "", "underline", "overline" or "line-through".
* @type String
* @default
*/
textDecoration: '',
/**
* Text alignment. Possible values: "left", "center", or "right".
* @type String
* @default
*/
textAlign: 'left',
/**
* Font style . Possible values: "", "normal", "italic" or "oblique".
* @type String
* @default
*/
fontStyle: '',
/**
* Line height
* @type Number
* @default
*/
lineHeight: 1.3,
/**
* Background color of an entire text box
* @type String
* @default
*/
backgroundColor: '',
/**
* Background color of text lines
* @type String
* @default
*/
textBackgroundColor: '',
/**
* URL of a font file, when using Cufon
* @type String | null
* @default
*/
path: null,
/**
* Indicates whether canvas native text methods should be used to render text (otherwise, Cufon is used)
* @type Boolean
* @default
*/
useNative: true,
/**
* List of properties to consider when checking if state of an object is changed ({@link fabric.Object#hasStateChanged})
* as well as for history (undo/redo) purposes
* @type Array
*/
stateProperties: stateProperties,
/**
* When defined, an object is rendered via stroke and this property specifies its color.
* <b>Backwards incompatibility note:</b> This property was named "strokeStyle" until v1.1.6
* @type String
* @default
*/
stroke: null,
/**
* Shadow object representing shadow of this shape.
* <b>Backwards incompatibility note:</b> This property was named "textShadow" (String) until v1.2.11
* @type fabric.Shadow
* @default
*/
shadow: null,
/**
* Constructor
* @param {String} text Text string
* @param {Object} [options] Options object
* @return {fabric.Text} thisArg
*/
initialize: function(text, options) {
options = options || { };
this.text = text;
this.__skipDimension = true;
this.setOptions(options);
this.__skipDimension = false;
this._initDimensions();
this.setCoords();
},
/**
* Renders text object on offscreen canvas, so that it would get dimensions
* @private
*/
_initDimensions: function() {
if (this.__skipDimension) return;
var canvasEl = fabric.util.createCanvasElement();
this._render(canvasEl.getContext('2d'));
},
/**
* Returns string representation of an instance
* @return {String} String representation of text object
*/
toString: function() {
return '#<fabric.Text (' + this.complexity() +
'): { "text": "' + this.text + '", "fontFamily": "' + this.fontFamily + '" }>';
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_render: function(ctx) {
var isInPathGroup = this.group && this.group.type !== 'group';
if (isInPathGroup && !this.transformMatrix) {
ctx.translate(-this.group.width/2 + this.left, -this.group.height / 2 + this.top);
}
else if (isInPathGroup && this.transformMatrix) {
ctx.translate(-this.group.width/2, -this.group.height/2);
}
if (typeof Cufon === 'undefined' || this.useNative === true) {
this._renderViaNative(ctx);
}
else {
this._renderViaCufon(ctx);
}
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_renderViaNative: function(ctx) {
this.transform(ctx, fabric.isLikelyNode);
this._setTextStyles(ctx);
var textLines = this.text.split(/\r?\n/);
this.width = this._getTextWidth(ctx, textLines);
this.height = this._getTextHeight(ctx, textLines);
this.clipTo && fabric.util.clipContext(this, ctx);
this._renderTextBackground(ctx, textLines);
if (this.textAlign !== 'left' && this.textAlign !== 'justify') {
ctx.save();
ctx.translate(this.textAlign === 'center' ? (this.width / 2) : this.width, 0);
}
ctx.save();
this._setShadow(ctx);
this._renderTextFill(ctx, textLines);
this._renderTextStroke(ctx, textLines);
this._removeShadow(ctx);
ctx.restore();
if (this.textAlign !== 'left' && this.textAlign !== 'justify') {
ctx.restore();
}
this._renderTextDecoration(ctx, textLines);
this.clipTo && ctx.restore();
this._setBoundaries(ctx, textLines);
this._totalLineHeight = 0;
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
* @param {Array} textLines Array of all text lines
*/
_setBoundaries: function(ctx, textLines) {
this._boundaries = [ ];
for (var i = 0, len = textLines.length; i < len; i++) {
var lineWidth = this._getLineWidth(ctx, textLines[i]);
var lineLeftOffset = this._getLineLeftOffset(lineWidth);
this._boundaries.push({
height: this.fontSize * this.lineHeight,
width: lineWidth,
left: lineLeftOffset
});
}
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_setTextStyles: function(ctx) {
if (this.fill) {
ctx.fillStyle = this.fill.toLive
? this.fill.toLive(ctx)
: this.fill;
}
if (this.stroke) {
ctx.lineWidth = this.strokeWidth;
ctx.lineCap = this.strokeLineCap;
ctx.lineJoin = this.strokeLineJoin;
ctx.miterLimit = this.strokeMiterLimit;
ctx.strokeStyle = this.stroke.toLive
? this.stroke.toLive(ctx)
: this.stroke;
}
ctx.textBaseline = 'alphabetic';
ctx.textAlign = this.textAlign;
ctx.font = this._getFontDeclaration();
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
* @param {Array} textLines Array of all text lines
* @return {Number} Height of fabric.Text object
*/
_getTextHeight: function(ctx, textLines) {
return this.fontSize * textLines.length * this.lineHeight;
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
* @param {Array} textLines Array of all text lines
* @return {Number} Maximum width of fabric.Text object
*/
_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
* @param {String} method Method name ("fillText" or "strokeText")
* @param {CanvasRenderingContext2D} ctx Context to render on
* @param {String} line Chars to render
* @param {Number} left Left position of text
* @param {Number} top Top position of text
*/
_drawChars: function(method, ctx, chars, left, top) {
ctx[method](chars, left, top);
},
/**
* @private
* @param {String} method Method name ("fillText" or "strokeText")
* @param {CanvasRenderingContext2D} ctx Context to render on
* @param {String} line Text to render
* @param {Number} left Left position of text
* @param {Number} top Top position of text
* @param {Number} lineIndex Index of a line in a text
*/
_drawTextLine: function(method, ctx, line, left, top, lineIndex) {
// lift the line by quarter of fontSize
top -= this.fontSize / 4;
// short-circuit
if (this.textAlign !== 'justify') {
this._drawChars(method, ctx, line, left, top, lineIndex);
return;
}
var lineWidth = ctx.measureText(line).width;
var totalWidth = this.width;
if (totalWidth > lineWidth) {
// stretch the line
var words = line.split(/\s+/);
var wordsWidth = ctx.measureText(line.replace(/\s+/g, '')).width;
var widthDiff = totalWidth - wordsWidth;
var numSpaces = words.length - 1;
var spaceWidth = widthDiff / numSpaces;
var leftOffset = 0;
for (var i = 0, len = words.length; i < len; i++) {
this._drawChars(method, ctx, words[i], left + leftOffset, top, lineIndex);
leftOffset += ctx.measureText(words[i]).width + spaceWidth;
}
}
else {
this._drawChars(method, ctx, line, left, top, lineIndex);
}
},
/**
* @private
* @return {Number} Left offset
*/
_getLeftOffset: function() {
if (fabric.isLikelyNode && (this.originX === 'left' || this.originX === 'center')) {
return 0;
}
return -this.width / 2;
},
/**
* @private
* @return {Number} Top offset
*/
_getTopOffset: function() {
if (fabric.isLikelyNode) {
if (this.originY === 'center') {
return -this.height / 2;
}
else if (this.originY === 'bottom') {
return -this.height;
}
return 0;
}
// in browser, text drawing always starts at vertical center
return -this.height / 2;
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
* @param {Array} textLines Array of all text lines
*/
_renderTextFill: function(ctx, textLines) {
if (!this.fill && !this.skipFillStrokeCheck) return;
this._boundaries = [ ];
var lineHeights = 0;
for (var i = 0, len = textLines.length; i < len; i++) {
var heightOfLine = this._getHeightOfLine(ctx, i, textLines);
lineHeights += heightOfLine;
this._drawTextLine(
'fillText',
ctx,
textLines[i],
this._getLeftOffset(),
this._getTopOffset() + lineHeights,
i
);
}
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
* @param {Array} textLines Array of all text lines
*/
_renderTextStroke: function(ctx, textLines) {
if (!this.stroke && !this.skipFillStrokeCheck) return;
var lineHeights = 0;
ctx.save();
if (this.strokeDashArray) {
// Spec requires the concatenation of two copies the dash list when the number of elements is odd
if (1 & this.strokeDashArray.length) {
this.strokeDashArray.push.apply(this.strokeDashArray, this.strokeDashArray);
}
supportsLineDash && ctx.setLineDash(this.strokeDashArray);
}
ctx.beginPath();
for (var i = 0, len = textLines.length; i < len; i++) {
var heightOfLine = this._getHeightOfLine(ctx, i, textLines);
lineHeights += heightOfLine;
this._drawTextLine(
'strokeText',
ctx,
textLines[i],
this._getLeftOffset(),
this._getTopOffset() + lineHeights,
i
);
}
ctx.closePath();
ctx.restore();
},
_getHeightOfLine: function() {
return this.fontSize * this.lineHeight;
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
* @param {Array} textLines Array of all text lines
*/
_renderTextBackground: function(ctx, textLines) {
this._renderTextBoxBackground(ctx);
this._renderTextLinesBackground(ctx, textLines);
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
_renderTextBoxBackground: function(ctx) {
if (!this.backgroundColor) return;
ctx.save();
ctx.fillStyle = this.backgroundColor;
ctx.fillRect(
this._getLeftOffset(),
this._getTopOffset(),
this.width,
this.height
);
ctx.restore();
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
* @param {Array} textLines Array of all text lines
*/
_renderTextLinesBackground: function(ctx, textLines) {
if (!this.textBackgroundColor) return;
ctx.save();
ctx.fillStyle = this.textBackgroundColor;
for (var i = 0, len = textLines.length; i < len; i++) {
if (textLines[i] !== '') {
var lineWidth = this._getLineWidth(ctx, textLines[i]);
var lineLeftOffset = this._getLineLeftOffset(lineWidth);
ctx.fillRect(
this._getLeftOffset() + lineLeftOffset,
this._getTopOffset() + (i * this.fontSize * this.lineHeight),
lineWidth,
this.fontSize * this.lineHeight
);
}
}
ctx.restore();
},
/**
* @private
* @param {Number} lineWidth Width of text line
* @return {Number} Line left offset
*/
_getLineLeftOffset: function(lineWidth) {
if (this.textAlign === 'center') {
return (this.width - lineWidth) / 2;
}
if (this.textAlign === 'right') {
return this.width - lineWidth;
}
return 0;
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
* @param {String} line Text line
* @return {Number} Line width
*/
_getLineWidth: function(ctx, line) {
return this.textAlign === 'justify'
? this.width
: ctx.measureText(line).width;
},
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
* @param {Array} textLines Array of all text lines
*/
_renderTextDecoration: function(ctx, textLines) {
if (!this.textDecoration) return;
// var halfOfVerticalBox = this.originY === 'top' ? 0 : this._getTextHeight(ctx, textLines) / 2;
var halfOfVerticalBox = this._getTextHeight(ctx, textLines) / 2;
var _this = this;
/** @ignore */
function renderLinesAtOffset(offset) {
for (var i = 0, len = textLines.length; i < len; i++) {
var lineWidth = _this._getLineWidth(ctx, textLines[i]);
var lineLeftOffset = _this._getLineLeftOffset(lineWidth);
ctx.fillRect(
_this._getLeftOffset() + lineLeftOffset,
(offset + (i * _this._getHeightOfLine(ctx, i, textLines))) - halfOfVerticalBox,
lineWidth,
1);
}
}
var fractionOfFontSize = this.fontSize / 4;
if (this.textDecoration.indexOf('underline') > -1) {
renderLinesAtOffset(this.fontSize * this.lineHeight);
}
if (this.textDecoration.indexOf('line-through') > -1) {
renderLinesAtOffset(this.fontSize * this.lineHeight - fractionOfFontSize);
}
if (this.textDecoration.indexOf('overline') > -1) {
renderLinesAtOffset(fractionOfFontSize);
}
},
/**
* @private
*/
_getFontDeclaration: function() {
return [
// node-canvas needs "weight style", while browsers need "style weight"
(fabric.isLikelyNode ? this.fontWeight : this.fontStyle),
(fabric.isLikelyNode ? this.fontStyle : this.fontWeight),
this.fontSize + 'px',
(fabric.isLikelyNode ? ('"' + this.fontFamily + '"') : this.fontFamily)
].join(' ');
},
/**
* Renders text instance on a specified context
* @param {CanvasRenderingContext2D} ctx Context to render on
* @param {Boolean} [noTransform] When true, context is not transformed
*/
render: function(ctx, noTransform) {
// do not render if object is not visible
if (!this.visible) return;
ctx.save();
this._render(ctx);
if (!noTransform && this.active) {
this.drawBorders(ctx);
this.drawControls(ctx);
}
ctx.restore();
},
/**
* Returns object representation of an instance
* @param {Array} [propertiesToInclude] Any properties that you might want to additionally include in the output
* @return {Object} Object representation of an instance
*/
toObject: function(propertiesToInclude) {
return extend(this.callSuper('toObject', propertiesToInclude), {
text: this.text,
fontSize: this.fontSize,
fontWeight: this.fontWeight,
fontFamily: this.fontFamily,
fontStyle: this.fontStyle,
lineHeight: this.lineHeight,
textDecoration: this.textDecoration,
textAlign: this.textAlign,
path: this.path,
backgroundColor: this.backgroundColor,
textBackgroundColor: this.textBackgroundColor,
useNative: this.useNative
});
},
/* _TO_SVG_START_ */
/**
* Returns SVG representation of an instance
* @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 [
'<g transform="', this.getSvgTransform(), '">',
textAndBg.textBgRects.join(''),
'<text ',
(this.fontFamily ? 'font-family="' + this.fontFamily.replace(/"/g,'\'') + '" ': ''),
(this.fontSize ? 'font-size="' + this.fontSize + '" ': ''),
(this.fontStyle ? 'font-style="' + this.fontStyle + '" ': ''),
(this.fontWeight ? 'font-weight="' + this.fontWeight + '" ': ''),
(this.textDecoration ? 'text-decoration="' + this.textDecoration + '" ': ''),
'style="', this.getSvgStyles(), '" ',
/* svg starts from left/bottom corner so we normalize height */
'transform="translate(', toFixed(textLeftOffset, 2), ' ', toFixed(textTopOffset, 2), ')">',
shadowSpans.join(''),
textAndBg.textSpans.join(''),
'</text>',
'</g>'
].join('');
},
/**
* @private
* @param {Number} lineTopOffset Line top offset
* @param {Array} textLines Array of all text lines
* @return {Array}
*/
_getSVGShadows: function(lineTopOffset, textLines) {
var shadowSpans = [],
i, len,
lineTopOffsetMultiplier = 1;
if (!this.shadow || !this._boundaries) {
return shadowSpans;
}
for (i = 0, len = textLines.length; i < len; i++) {
if (textLines[i] !== '') {
var lineLeftOffset = (this._boundaries && this._boundaries[i]) ? this._boundaries[i].left : 0;
shadowSpans.push(
'<tspan x="',
toFixed((lineLeftOffset + lineTopOffsetMultiplier) + this.shadow.offsetX, 2),
((i === 0 || this.useNative) ? '" y' : '" dy'), '="',
toFixed(this.useNative
? ((lineTopOffset * i) - this.height / 2 + this.shadow.offsetY)
: (lineTopOffset + (i === 0 ? this.shadow.offsetY : 0)), 2),
'" ',
this._getFillAttributes(this.shadow.color), '>',
fabric.util.string.escapeXml(textLines[i]),
'</tspan>');
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;
},
/**
* @private
* @param {Number} lineTopOffset Line top offset
* @param {Number} textLeftOffset Text left offset
* @param {Array} textLines Array of all text lines
* @return {Object}
*/
_getSVGTextAndBg: function(lineTopOffset, textLeftOffset, textLines) {
var textSpans = [ ], textBgRects = [ ], i, lineLeftOffset, len, lineTopOffsetMultiplier = 1;
// bounding-box background
if (this.backgroundColor && this._boundaries) {
textBgRects.push(
'<rect ',
this._getFillAttributes(this.backgroundColor),
' x="',
toFixed(-this.width / 2, 2),
'" y="',
toFixed(-this.height / 2, 2),
'" width="',
toFixed(this.width, 2),
'" height="',
toFixed(this.height, 2),
'"></rect>');
}
// text and text-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(
'<tspan x="',
lineLeftOffset, '" ',
(i === 0 || this.useNative ? 'y' : 'dy'), '="',
toFixed(this.useNative ? ((lineTopOffset * i) - this.height / 2) : (lineTopOffset * lineTopOffsetMultiplier), 2) , '" ',
// doing this on <tspan> elements since setting opacity on containing <text> one doesn't work in Illustrator
this._getFillAttributes(this.fill), '>',
fabric.util.string.escapeXml(textLines[i]),
'</tspan>'
);
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.textBackgroundColor || !this._boundaries) continue;
textBgRects.push(
'<rect ',
this._getFillAttributes(this.textBackgroundColor),
' x="',
toFixed(textLeftOffset + this._boundaries[i].left, 2),
'" y="',
/* an offset that seems to straighten things out */
toFixed((lineTopOffset * i) - this.height / 2, 2),
'" width="',
toFixed(this._boundaries[i].width, 2),
'" height="',
toFixed(this._boundaries[i].height, 2),
'"></rect>');
}
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
*
* @private
* @param {Any} value
* @return {String}
*/
_getFillAttributes: function(value) {
var fillColor = (value && typeof value === 'string') ? new fabric.Color(value) : '';
if (!fillColor || !fillColor.getSource() || fillColor.getAlpha() === 1) {
return 'fill="' + value + '"';
}
return 'opacity="' + fillColor.getAlpha() + '" fill="' + fillColor.setAlpha(1).toRgb() + '"';
},
/* _TO_SVG_END_ */
/**
* Sets specified property to a specified value
* @param {String} key
* @param {Any} value
* @return {fabric.Text} thisArg
* @chainable
*/
_set: function(key, value) {
if (key === 'fontFamily' && this.path) {
this.path = this.path.replace(/(.*?)([^\/]*)(\.font\.js)/, '$1' + value + '$3');
}
this.callSuper('_set', key, value);
if (key in this._dimensionAffectingProps) {
this._initDimensions();
this.setCoords();
}
},
/**
* Returns complexity of an instance
* @return {Number} complexity
*/
complexity: function() {
return 1;
}
});
/* _FROM_SVG_START_ */
/**
* List of attribute names to account for when parsing SVG element (used by {@link fabric.Text.fromElement})
* @static
* @memberOf fabric.Text
* @see: http://www.w3.org/TR/SVG/text.html#TextElement
*/
fabric.Text.ATTRIBUTE_NAMES = fabric.SHARED_ATTRIBUTES.concat(
'x y font-family font-style font-weight font-size text-decoration'.split(' '));
/**
* Returns fabric.Text instance from an SVG element (<b>not yet implemented</b>)
* @static
* @memberOf fabric.Text
* @param {SVGElement} element Element to parse
* @param {Object} [options] Options object
* @return {fabric.Text} Instance of fabric.Text
*/
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);
var text = new fabric.Text(element.textContent, options);
/*
Adjust positioning:
x/y attributes in SVG correspond to the bottom-left corner of text bounding box
top/left properties in Fabric correspond to center point of text bounding box
*/
text.set({
left: text.getLeft() + text.getWidth() / 2,
top: text.getTop() - text.getHeight() / 2
});
return text;
};
/* _FROM_SVG_END_ */
/**
* Returns fabric.Text instance from an object representation
* @static
* @memberOf fabric.Text
* @param object {Object} object Object to create an instance from
* @return {fabric.Text} Instance of fabric.Text
*/
fabric.Text.fromObject = function(object) {
return new fabric.Text(object.text, clone(object));
};
fabric.util.createAccessors(fabric.Text);
})(typeof exports !== 'undefined' ? exports : this);
/**
* @private
* @param {CanvasRenderingContext2D} ctx Context to render on
*/
fabric.util.object.extend(fabric.Text.prototype, {
_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.shadow && this.shadow.toString(),
textAlign: this.textAlign,
fontStyle: this.fontStyle,
lineHeight: this.lineHeight,
stroke: this.stroke,
strokeWidth: this.strokeWidth,
backgroundColor: this.backgroundColor,
textBackgroundColor: this.textBackgroundColor
});
// update width, height
this.width = o.width;
this.height = o.height;
this._totalLineHeight = o.totalLineHeight;
this._fontAscent = o.fontAscent;
this._boundaries = o.boundaries;
el = null;
// need to set coords _after_ the width/height was retreived from Cufon
this.setCoords();
},
/**
* @private
*/
_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;
}
});
(function() {
if (typeof document !== 'undefined' && typeof window !== 'undefined') {
return;
}
var DOMParser = new require('xmldom').DOMParser,
URL = require('url'),
HTTP = require('http'),
HTTPS = require('https'),
Canvas = require('canvas'),
Image = require('canvas').Image;
/** @private */
function request(url, encoding, callback) {
var oURL = URL.parse(url);
// detect if http or https is used
if ( !oURL.port ) {
oURL.port = ( oURL.protocol.indexOf('https:') === 0 ) ? 443 : 80;
}
// assign request handler based on protocol
var reqHandler = ( oURL.port === 443 ) ? HTTPS : HTTP;
var req = reqHandler.request({
hostname: oURL.hostname,
port: oURL.port,
path: oURL.path,
method: 'GET'
}, 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;
}
});
});
req.on('error', function(err) {
if (err.errno === process.ECONNREFUSED) {
fabric.log('ECONNREFUSED: connection refused to ' + oURL.hostname + ':' + oURL.port);
}
else {
fabric.log(err.message);
}
});
req.end();
}
/** @private */
function request_fs(path, callback){
var fs = require('fs');
fs.readFile(path, function (err, data) {
if (err) {
fabric.log(err);
throw err;
} else {
callback(data);
}
});
}
fabric.util.loadImage = function(url, callback, context) {
var createImageAndCallBack = function(data){
img.src = new Buffer(data, 'binary');
// preserving original url, which seems to be lost in node-canvas
img._src = url;
callback && callback.call(context, img);
};
var img = new Image();
if (url && (url instanceof Buffer || url.indexOf('data') === 0)) {
img.src = img._src = url;
callback && callback.call(context, img);
}
else if (url && url.indexOf('http') !== 0) {
request_fs(url, createImageAndCallBack);
}
else if (url) {
request(url, 'binary', createImageAndCallBack);
}
};
fabric.loadSVGFromURL = function(url, callback, reviver) {
url = url.replace(/^\n\s*/, '').replace(/\?.*$/, '').trim();
if (url.indexOf('http') !== 0) {
request_fs(url, function(body) {
fabric.loadSVGFromString(body, callback, reviver);
});
}
else {
request(url, '', function(body) {
fabric.loadSVGFromString(body, callback, reviver);
});
}
};
fabric.loadSVGFromString = function(string, callback, reviver) {
var doc = new DOMParser().parseFromString(string);
fabric.parseSVGDocument(doc.documentElement, function(results, options) {
callback && callback(results, options);
}, reviver);
};
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, function(filters) {
oImg.filters = filters || [ ];
callback && callback(oImg);
});
});
};
/**
* Only available when running fabric on node.js
* @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;
fabricCanvas.Font = Canvas.Font;
return fabricCanvas;
};
/** @ignore */
fabric.StaticCanvas.prototype.createPNGStream = function() {
return this.nodeCanvas.createPNGStream();
};
fabric.StaticCanvas.prototype.createJPEGStream = function(opts) {
return this.nodeCanvas.createJPEGStream(opts);
};
var origSetWidth = fabric.StaticCanvas.prototype.setWidth;
fabric.StaticCanvas.prototype.setWidth = function(width) {
origSetWidth.call(this, width);
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, height);
this.nodeCanvas.height = height;
return this;
};
if (fabric.Canvas) {
fabric.Canvas.prototype.setHeight = fabric.StaticCanvas.prototype.setHeight;
}
})();
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