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html2canvas

html2canvas library

Dieses Skript sollte nicht direkt installiert werden. Es handelt sich hier um eine Bibliothek für andere Skripte, welche über folgenden Befehl in den Metadaten eines Skriptes eingebunden wird // @require https://update.greatest.deepsurf.us/scripts/27102/173516/html2canvas.js 

  1. /*
  2.   html2canvas 0.5.0-alpha1 <http://html2canvas.hertzen.com>
  3.   Copyright (c) 2015 Niklas von Hertzen
  4.  
  5.   Released under MIT License
  6. */
  7.  
  8. (function(window, document, exports, global, define, undefined){
  9.  
  10. /*!
  11.  * @overview es6-promise - a tiny implementation of Promises/A+.
  12.  * @copyright Copyright (c) 2014 Yehuda Katz, Tom Dale, Stefan Penner and contributors (Conversion to ES6 API by Jake Archibald)
  13.  * @license   Licensed under MIT license
  14.  *            See https://raw.githubusercontent.com/jakearchibald/es6-promise/master/LICENSE
  15.  * @version   2.0.1
  16.  */
  17.  
  18. (function(){function r(a,b){n[l]=a;n[l+1]=b;l+=2;2===l&&A()}function s(a){return"function"===typeof a}function F(){return function(){process.nextTick(t)}}function G(){var a=0,b=new B(t),c=document.createTextNode("");b.observe(c,{characterData:!0});return function(){c.data=a=++a%2}}function H(){var a=new MessageChannel;a.port1.onmessage=t;return function(){a.port2.postMessage(0)}}function I(){return function(){setTimeout(t,1)}}function t(){for(var a=0;a<l;a+=2)(0,n[a])(n[a+1]),n[a]=void 0,n[a+1]=void 0;
  19. l=0}function p(){}function J(a,b,c,d){try{a.call(b,c,d)}catch(e){return e}}function K(a,b,c){r(function(a){var e=!1,f=J(c,b,function(c){e||(e=!0,b!==c?q(a,c):m(a,c))},function(b){e||(e=!0,g(a,b))});!e&&f&&(e=!0,g(a,f))},a)}function L(a,b){1===b.a?m(a,b.b):2===a.a?g(a,b.b):u(b,void 0,function(b){q(a,b)},function(b){g(a,b)})}function q(a,b){if(a===b)g(a,new TypeError("You cannot resolve a promise with itself"));else if("function"===typeof b||"object"===typeof b&&null!==b)if(b.constructor===a.constructor)L(a,
  20. b);else{var c;try{c=b.then}catch(d){v.error=d,c=v}c===v?g(a,v.error):void 0===c?m(a,b):s(c)?K(a,b,c):m(a,b)}else m(a,b)}function M(a){a.f&&a.f(a.b);x(a)}function m(a,b){void 0===a.a&&(a.b=b,a.a=1,0!==a.e.length&&r(x,a))}function g(a,b){void 0===a.a&&(a.a=2,a.b=b,r(M,a))}function u(a,b,c,d){var e=a.e,f=e.length;a.f=null;e[f]=b;e[f+1]=c;e[f+2]=d;0===f&&a.a&&r(x,a)}function x(a){var b=a.e,c=a.a;if(0!==b.length){for(var d,e,f=a.b,g=0;g<b.length;g+=3)d=b[g],e=b[g+c],d?C(c,d,e,f):e(f);a.e.length=0}}function D(){this.error=
  21. null}function C(a,b,c,d){var e=s(c),f,k,h,l;if(e){try{f=c(d)}catch(n){y.error=n,f=y}f===y?(l=!0,k=f.error,f=null):h=!0;if(b===f){g(b,new TypeError("A promises callback cannot return that same promise."));return}}else f=d,h=!0;void 0===b.a&&(e&&h?q(b,f):l?g(b,k):1===a?m(b,f):2===a&&g(b,f))}function N(a,b){try{b(function(b){q(a,b)},function(b){g(a,b)})}catch(c){g(a,c)}}function k(a,b,c,d){this.n=a;this.c=new a(p,d);this.i=c;this.o(b)?(this.m=b,this.d=this.length=b.length,this.l(),0===this.length?m(this.c,
  22. this.b):(this.length=this.length||0,this.k(),0===this.d&&m(this.c,this.b))):g(this.c,this.p())}function h(a){O++;this.b=this.a=void 0;this.e=[];if(p!==a){if(!s(a))throw new TypeError("You must pass a resolver function as the first argument to the promise constructor");if(!(this instanceof h))throw new TypeError("Failed to construct 'Promise': Please use the 'new' operator, this object constructor cannot be called as a function.");N(this,a)}}var E=Array.isArray?Array.isArray:function(a){return"[object Array]"===
  23. Object.prototype.toString.call(a)},l=0,w="undefined"!==typeof window?window:{},B=w.MutationObserver||w.WebKitMutationObserver,w="undefined"!==typeof Uint8ClampedArray&&"undefined"!==typeof importScripts&&"undefined"!==typeof MessageChannel,n=Array(1E3),A;A="undefined"!==typeof process&&"[object process]"==={}.toString.call(process)?F():B?G():w?H():I();var v=new D,y=new D;k.prototype.o=function(a){return E(a)};k.prototype.p=function(){return Error("Array Methods must be provided an Array")};k.prototype.l=
  24. function(){this.b=Array(this.length)};k.prototype.k=function(){for(var a=this.length,b=this.c,c=this.m,d=0;void 0===b.a&&d<a;d++)this.j(c[d],d)};k.prototype.j=function(a,b){var c=this.n;"object"===typeof a&&null!==a?a.constructor===c&&void 0!==a.a?(a.f=null,this.g(a.a,b,a.b)):this.q(c.resolve(a),b):(this.d--,this.b[b]=this.h(a))};k.prototype.g=function(a,b,c){var d=this.c;void 0===d.a&&(this.d--,this.i&&2===a?g(d,c):this.b[b]=this.h(c));0===this.d&&m(d,this.b)};k.prototype.h=function(a){return a};
  25. k.prototype.q=function(a,b){var c=this;u(a,void 0,function(a){c.g(1,b,a)},function(a){c.g(2,b,a)})};var O=0;h.all=function(a,b){return(new k(this,a,!0,b)).c};h.race=function(a,b){function c(a){q(e,a)}function d(a){g(e,a)}var e=new this(p,b);if(!E(a))return (g(e,new TypeError("You must pass an array to race.")), e);for(var f=a.length,h=0;void 0===e.a&&h<f;h++)u(this.resolve(a[h]),void 0,c,d);return e};h.resolve=function(a,b){if(a&&"object"===typeof a&&a.constructor===this)return a;var c=new this(p,b);
  26. q(c,a);return c};h.reject=function(a,b){var c=new this(p,b);g(c,a);return c};h.prototype={constructor:h,then:function(a,b){var c=this.a;if(1===c&&!a||2===c&&!b)return this;var d=new this.constructor(p),e=this.b;if(c){var f=arguments[c-1];r(function(){C(c,d,f,e)})}else u(this,d,a,b);return d},"catch":function(a){return this.then(null,a)}};var z={Promise:h,polyfill:function(){var a;a="undefined"!==typeof global?global:"undefined"!==typeof window&&window.document?window:self;"Promise"in a&&"resolve"in
  27. a.Promise&&"reject"in a.Promise&&"all"in a.Promise&&"race"in a.Promise&&function(){var b;new a.Promise(function(a){b=a});return s(b)}()||(a.Promise=h)}};"function"===typeof define&&define.amd?define(function(){return z}):"undefined"!==typeof module&&module.exports?module.exports=z:"undefined"!==typeof this&&(this.ES6Promise=z);}).call(window);
  28. if (window) {
  29.     window.ES6Promise.polyfill();
  30. }
  31.  
  32.  
  33. if (typeof(document) === "undefined" || typeof(Object.create) !== "function" || typeof(document.createElement("canvas").getContext) !== "function") {
  34.     (window || module.exports).html2canvas = function() {
  35.         return Promise.reject("No canvas support");
  36.     };
  37.     return;
  38. }
  39.  
  40. /*! https://mths.be/punycode v1.3.1 by @mathias */
  41. ;(function(root) {
  42.  
  43. 	/** Detect free variables */
  44. 	var freeExports = typeof exports == 'object' && exports &&
  45. 		!exports.nodeType && exports;
  46. 	var freeModule = typeof module == 'object' && module &&
  47. 		!module.nodeType && module;
  48. 	var freeGlobal = typeof global == 'object' && global;
  49. 	if (
  50. 		freeGlobal.global === freeGlobal ||
  51. 		freeGlobal.window === freeGlobal ||
  52. 		freeGlobal.self === freeGlobal
  53. 	) {
  54. 		root = freeGlobal;
  55. 	}
  56.  
  57. 	/**
  58. 	 * The `punycode` object.
  59. 	 * @name punycode
  60. 	 * @type Object
  61. 	 */
  62. 	var punycode,
  63.  
  64. 	/** Highest positive signed 32-bit float value */
  65. 	maxInt = 2147483647, // aka. 0x7FFFFFFF or 2^31-1
  66.  
  67. 	/** Bootstring parameters */
  68. 	base = 36,
  69. 	tMin = 1,
  70. 	tMax = 26,
  71. 	skew = 38,
  72. 	damp = 700,
  73. 	initialBias = 72,
  74. 	initialN = 128, // 0x80
  75. 	delimiter = '-', // '\x2D'
  76.  
  77. 	/** Regular expressions */
  78. 	regexPunycode = /^xn--/,
  79. 	regexNonASCII = /[^\x20-\x7E]/, // unprintable ASCII chars + non-ASCII chars
  80. 	regexSeparators = /[\x2E\u3002\uFF0E\uFF61]/g, // RFC 3490 separators
  81.  
  82. 	/** Error messages */
  83. 	errors = {
  84. 		'overflow': 'Overflow: input needs wider integers to process',
  85. 		'not-basic': 'Illegal input >= 0x80 (not a basic code point)',
  86. 		'invalid-input': 'Invalid input'
  87. 	},
  88.  
  89. 	/** Convenience shortcuts */
  90. 	baseMinusTMin = base - tMin,
  91. 	floor = Math.floor,
  92. 	stringFromCharCode = String.fromCharCode,
  93.  
  94. 	/** Temporary variable */
  95. 	key;
  96.  
  97. 	/*--------------------------------------------------------------------------*/
  98.  
  99. 	/**
  100. 	 * A generic error utility function.
  101. 	 * @private
  102. 	 * @param {String} type The error type.
  103. 	 * @returns {Error} Throws a `RangeError` with the applicable error message.
  104. 	 */
  105. 	function error(type) {
  106. 		throw RangeError(errors[type]);
  107. 	}
  108.  
  109. 	/**
  110. 	 * A generic `Array#map` utility function.
  111. 	 * @private
  112. 	 * @param {Array} array The array to iterate over.
  113. 	 * @param {Function} callback The function that gets called for every array
  114. 	 * item.
  115. 	 * @returns {Array} A new array of values returned by the callback function.
  116. 	 */
  117. 	function map(array, fn) {
  118. 		var length = array.length;
  119. 		var result = [];
  120. 		while (length--) {
  121. 			result[length] = fn(array[length]);
  122. 		}
  123. 		return result;
  124. 	}
  125.  
  126. 	/**
  127. 	 * A simple `Array#map`-like wrapper to work with domain name strings or email
  128. 	 * addresses.
  129. 	 * @private
  130. 	 * @param {String} domain The domain name or email address.
  131. 	 * @param {Function} callback The function that gets called for every
  132. 	 * character.
  133. 	 * @returns {Array} A new string of characters returned by the callback
  134. 	 * function.
  135. 	 */
  136. 	function mapDomain(string, fn) {
  137. 		var parts = string.split('@');
  138. 		var result = '';
  139. 		if (parts.length > 1) {
  140. 			// In email addresses, only the domain name should be punycoded. Leave
  141. 			// the local part (i.e. everything up to `@`) intact.
  142. 			result = parts[0] + '@';
  143. 			string = parts[1];
  144. 		}
  145. 		var labels = string.split(regexSeparators);
  146. 		var encoded = map(labels, fn).join('.');
  147. 		return result + encoded;
  148. 	}
  149.  
  150. 	/**
  151. 	 * Creates an array containing the numeric code points of each Unicode
  152. 	 * character in the string. While JavaScript uses UCS-2 internally,
  153. 	 * this function will convert a pair of surrogate halves (each of which
  154. 	 * UCS-2 exposes as separate characters) into a single code point,
  155. 	 * matching UTF-16.
  156. 	 * @see `punycode.ucs2.encode`
  157. 	 * @see <https://mathiasbynens.be/notes/javascript-encoding>
  158. 	 * @memberOf punycode.ucs2
  159. 	 * @name decode
  160. 	 * @param {String} string The Unicode input string (UCS-2).
  161. 	 * @returns {Array} The new array of code points.
  162. 	 */
  163. 	function ucs2decode(string) {
  164. 		var output = [],
  165. 		    counter = 0,
  166. 		    length = string.length,
  167. 		    value,
  168. 		    extra;
  169. 		while (counter < length) {
  170. 			value = string.charCodeAt(counter++);
  171. 			if (value >= 0xD800 && value <= 0xDBFF && counter < length) {
  172. 				// high surrogate, and there is a next character
  173. 				extra = string.charCodeAt(counter++);
  174. 				if ((extra & 0xFC00) == 0xDC00) { // low surrogate
  175. 					output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);
  176. 				} else {
  177. 					// unmatched surrogate; only append this code unit, in case the next
  178. 					// code unit is the high surrogate of a surrogate pair
  179. 					output.push(value);
  180. 					counter--;
  181. 				}
  182. 			} else {
  183. 				output.push(value);
  184. 			}
  185. 		}
  186. 		return output;
  187. 	}
  188.  
  189. 	/**
  190. 	 * Creates a string based on an array of numeric code points.
  191. 	 * @see `punycode.ucs2.decode`
  192. 	 * @memberOf punycode.ucs2
  193. 	 * @name encode
  194. 	 * @param {Array} codePoints The array of numeric code points.
  195. 	 * @returns {String} The new Unicode string (UCS-2).
  196. 	 */
  197. 	function ucs2encode(array) {
  198. 		return map(array, function(value) {
  199. 			var output = '';
  200. 			if (value > 0xFFFF) {
  201. 				value -= 0x10000;
  202. 				output += stringFromCharCode(value >>> 10 & 0x3FF | 0xD800);
  203. 				value = 0xDC00 | value & 0x3FF;
  204. 			}
  205. 			output += stringFromCharCode(value);
  206. 			return output;
  207. 		}).join('');
  208. 	}
  209.  
  210. 	/**
  211. 	 * Converts a basic code point into a digit/integer.
  212. 	 * @see `digitToBasic()`
  213. 	 * @private
  214. 	 * @param {Number} codePoint The basic numeric code point value.
  215. 	 * @returns {Number} The numeric value of a basic code point (for use in
  216. 	 * representing integers) in the range `0` to `base - 1`, or `base` if
  217. 	 * the code point does not represent a value.
  218. 	 */
  219. 	function basicToDigit(codePoint) {
  220. 		if (codePoint - 48 < 10) {
  221. 			return codePoint - 22;
  222. 		}
  223. 		if (codePoint - 65 < 26) {
  224. 			return codePoint - 65;
  225. 		}
  226. 		if (codePoint - 97 < 26) {
  227. 			return codePoint - 97;
  228. 		}
  229. 		return base;
  230. 	}
  231.  
  232. 	/**
  233. 	 * Converts a digit/integer into a basic code point.
  234. 	 * @see `basicToDigit()`
  235. 	 * @private
  236. 	 * @param {Number} digit The numeric value of a basic code point.
  237. 	 * @returns {Number} The basic code point whose value (when used for
  238. 	 * representing integers) is `digit`, which needs to be in the range
  239. 	 * `0` to `base - 1`. If `flag` is non-zero, the uppercase form is
  240. 	 * used; else, the lowercase form is used. The behavior is undefined
  241. 	 * if `flag` is non-zero and `digit` has no uppercase form.
  242. 	 */
  243. 	function digitToBasic(digit, flag) {
  244. 		//  0..25 map to ASCII a..z or A..Z
  245. 		// 26..35 map to ASCII 0..9
  246. 		return digit + 22 + 75 * (digit < 26) - ((flag != 0) << 5);
  247. 	}
  248.  
  249. 	/**
  250. 	 * Bias adaptation function as per section 3.4 of RFC 3492.
  251. 	 * http://tools.ietf.org/html/rfc3492#section-3.4
  252. 	 * @private
  253. 	 */
  254. 	function adapt(delta, numPoints, firstTime) {
  255. 		var k = 0;
  256. 		delta = firstTime ? floor(delta / damp) : delta >> 1;
  257. 		delta += floor(delta / numPoints);
  258. 		for (/* no initialization */; delta > baseMinusTMin * tMax >> 1; k += base) {
  259. 			delta = floor(delta / baseMinusTMin);
  260. 		}
  261. 		return floor(k + (baseMinusTMin + 1) * delta / (delta + skew));
  262. 	}
  263.  
  264. 	/**
  265. 	 * Converts a Punycode string of ASCII-only symbols to a string of Unicode
  266. 	 * symbols.
  267. 	 * @memberOf punycode
  268. 	 * @param {String} input The Punycode string of ASCII-only symbols.
  269. 	 * @returns {String} The resulting string of Unicode symbols.
  270. 	 */
  271. 	function decode(input) {
  272. 		// Don't use UCS-2
  273. 		var output = [],
  274. 		    inputLength = input.length,
  275. 		    out,
  276. 		    i = 0,
  277. 		    n = initialN,
  278. 		    bias = initialBias,
  279. 		    basic,
  280. 		    j,
  281. 		    index,
  282. 		    oldi,
  283. 		    w,
  284. 		    k,
  285. 		    digit,
  286. 		    t,
  287. 		    /** Cached calculation results */
  288. 		    baseMinusT;
  289.  
  290. 		// Handle the basic code points: let `basic` be the number of input code
  291. 		// points before the last delimiter, or `0` if there is none, then copy
  292. 		// the first basic code points to the output.
  293.  
  294. 		basic = input.lastIndexOf(delimiter);
  295. 		if (basic < 0) {
  296. 			basic = 0;
  297. 		}
  298.  
  299. 		for (j = 0; j < basic; ++j) {
  300. 			// if it's not a basic code point
  301. 			if (input.charCodeAt(j) >= 0x80) {
  302. 				error('not-basic');
  303. 			}
  304. 			output.push(input.charCodeAt(j));
  305. 		}
  306.  
  307. 		// Main decoding loop: start just after the last delimiter if any basic code
  308. 		// points were copied; start at the beginning otherwise.
  309.  
  310. 		for (index = basic > 0 ? basic + 1 : 0; index < inputLength; /* no final expression */) {
  311.  
  312. 			// `index` is the index of the next character to be consumed.
  313. 			// Decode a generalized variable-length integer into `delta`,
  314. 			// which gets added to `i`. The overflow checking is easier
  315. 			// if we increase `i` as we go, then subtract off its starting
  316. 			// value at the end to obtain `delta`.
  317. 			for (oldi = i, w = 1, k = base; /* no condition */; k += base) {
  318.  
  319. 				if (index >= inputLength) {
  320. 					error('invalid-input');
  321. 				}
  322.  
  323. 				digit = basicToDigit(input.charCodeAt(index++));
  324.  
  325. 				if (digit >= base || digit > floor((maxInt - i) / w)) {
  326. 					error('overflow');
  327. 				}
  328.  
  329. 				i += digit * w;
  330. 				t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);
  331.  
  332. 				if (digit < t) {
  333. 					break;
  334. 				}
  335.  
  336. 				baseMinusT = base - t;
  337. 				if (w > floor(maxInt / baseMinusT)) {
  338. 					error('overflow');
  339. 				}
  340.  
  341. 				w *= baseMinusT;
  342.  
  343. 			}
  344.  
  345. 			out = output.length + 1;
  346. 			bias = adapt(i - oldi, out, oldi == 0);
  347.  
  348. 			// `i` was supposed to wrap around from `out` to `0`,
  349. 			// incrementing `n` each time, so we'll fix that now:
  350. 			if (floor(i / out) > maxInt - n) {
  351. 				error('overflow');
  352. 			}
  353.  
  354. 			n += floor(i / out);
  355. 			i %= out;
  356.  
  357. 			// Insert `n` at position `i` of the output
  358. 			output.splice(i++, 0, n);
  359.  
  360. 		}
  361.  
  362. 		return ucs2encode(output);
  363. 	}
  364.  
  365. 	/**
  366. 	 * Converts a string of Unicode symbols (e.g. a domain name label) to a
  367. 	 * Punycode string of ASCII-only symbols.
  368. 	 * @memberOf punycode
  369. 	 * @param {String} input The string of Unicode symbols.
  370. 	 * @returns {String} The resulting Punycode string of ASCII-only symbols.
  371. 	 */
  372. 	function encode(input) {
  373. 		var n,
  374. 		    delta,
  375. 		    handledCPCount,
  376. 		    basicLength,
  377. 		    bias,
  378. 		    j,
  379. 		    m,
  380. 		    q,
  381. 		    k,
  382. 		    t,
  383. 		    currentValue,
  384. 		    output = [],
  385. 		    /** `inputLength` will hold the number of code points in `input`. */
  386. 		    inputLength,
  387. 		    /** Cached calculation results */
  388. 		    handledCPCountPlusOne,
  389. 		    baseMinusT,
  390. 		    qMinusT;
  391.  
  392. 		// Convert the input in UCS-2 to Unicode
  393. 		input = ucs2decode(input);
  394.  
  395. 		// Cache the length
  396. 		inputLength = input.length;
  397.  
  398. 		// Initialize the state
  399. 		n = initialN;
  400. 		delta = 0;
  401. 		bias = initialBias;
  402.  
  403. 		// Handle the basic code points
  404. 		for (j = 0; j < inputLength; ++j) {
  405. 			currentValue = input[j];
  406. 			if (currentValue < 0x80) {
  407. 				output.push(stringFromCharCode(currentValue));
  408. 			}
  409. 		}
  410.  
  411. 		handledCPCount = basicLength = output.length;
  412.  
  413. 		// `handledCPCount` is the number of code points that have been handled;
  414. 		// `basicLength` is the number of basic code points.
  415.  
  416. 		// Finish the basic string - if it is not empty - with a delimiter
  417. 		if (basicLength) {
  418. 			output.push(delimiter);
  419. 		}
  420.  
  421. 		// Main encoding loop:
  422. 		while (handledCPCount < inputLength) {
  423.  
  424. 			// All non-basic code points < n have been handled already. Find the next
  425. 			// larger one:
  426. 			for (m = maxInt, j = 0; j < inputLength; ++j) {
  427. 				currentValue = input[j];
  428. 				if (currentValue >= n && currentValue < m) {
  429. 					m = currentValue;
  430. 				}
  431. 			}
  432.  
  433. 			// Increase `delta` enough to advance the decoder's <n,i> state to <m,0>,
  434. 			// but guard against overflow
  435. 			handledCPCountPlusOne = handledCPCount + 1;
  436. 			if (m - n > floor((maxInt - delta) / handledCPCountPlusOne)) {
  437. 				error('overflow');
  438. 			}
  439.  
  440. 			delta += (m - n) * handledCPCountPlusOne;
  441. 			n = m;
  442.  
  443. 			for (j = 0; j < inputLength; ++j) {
  444. 				currentValue = input[j];
  445.  
  446. 				if (currentValue < n && ++delta > maxInt) {
  447. 					error('overflow');
  448. 				}
  449.  
  450. 				if (currentValue == n) {
  451. 					// Represent delta as a generalized variable-length integer
  452. 					for (q = delta, k = base; /* no condition */; k += base) {
  453. 						t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);
  454. 						if (q < t) {
  455. 							break;
  456. 						}
  457. 						qMinusT = q - t;
  458. 						baseMinusT = base - t;
  459. 						output.push(
  460. 							stringFromCharCode(digitToBasic(t + qMinusT % baseMinusT, 0))
  461. 						);
  462. 						q = floor(qMinusT / baseMinusT);
  463. 					}
  464.  
  465. 					output.push(stringFromCharCode(digitToBasic(q, 0)));
  466. 					bias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength);
  467. 					delta = 0;
  468. 					++handledCPCount;
  469. 				}
  470. 			}
  471.  
  472. 			++delta;
  473. 			++n;
  474.  
  475. 		}
  476. 		return output.join('');
  477. 	}
  478.  
  479. 	/**
  480. 	 * Converts a Punycode string representing a domain name or an email address
  481. 	 * to Unicode. Only the Punycoded parts of the input will be converted, i.e.
  482. 	 * it doesn't matter if you call it on a string that has already been
  483. 	 * converted to Unicode.
  484. 	 * @memberOf punycode
  485. 	 * @param {String} input The Punycoded domain name or email address to
  486. 	 * convert to Unicode.
  487. 	 * @returns {String} The Unicode representation of the given Punycode
  488. 	 * string.
  489. 	 */
  490. 	function toUnicode(input) {
  491. 		return mapDomain(input, function(string) {
  492. 			return regexPunycode.test(string)
  493. 				? decode(string.slice(4).toLowerCase())
  494. 				: string;
  495. 		});
  496. 	}
  497.  
  498. 	/**
  499. 	 * Converts a Unicode string representing a domain name or an email address to
  500. 	 * Punycode. Only the non-ASCII parts of the domain name will be converted,
  501. 	 * i.e. it doesn't matter if you call it with a domain that's already in
  502. 	 * ASCII.
  503. 	 * @memberOf punycode
  504. 	 * @param {String} input The domain name or email address to convert, as a
  505. 	 * Unicode string.
  506. 	 * @returns {String} The Punycode representation of the given domain name or
  507. 	 * email address.
  508. 	 */
  509. 	function toASCII(input) {
  510. 		return mapDomain(input, function(string) {
  511. 			return regexNonASCII.test(string)
  512. 				? 'xn--' + encode(string)
  513. 				: string;
  514. 		});
  515. 	}
  516.  
  517. 	/*--------------------------------------------------------------------------*/
  518.  
  519. 	/** Define the public API */
  520. 	punycode = {
  521. 		/**
  522. 		 * A string representing the current Punycode.js version number.
  523. 		 * @memberOf punycode
  524. 		 * @type String
  525. 		 */
  526. 		'version': '1.3.1',
  527. 		/**
  528. 		 * An object of methods to convert from JavaScript's internal character
  529. 		 * representation (UCS-2) to Unicode code points, and back.
  530. 		 * @see <https://mathiasbynens.be/notes/javascript-encoding>
  531. 		 * @memberOf punycode
  532. 		 * @type Object
  533. 		 */
  534. 		'ucs2': {
  535. 			'decode': ucs2decode,
  536. 			'encode': ucs2encode
  537. 		},
  538. 		'decode': decode,
  539. 		'encode': encode,
  540. 		'toASCII': toASCII,
  541. 		'toUnicode': toUnicode
  542. 	};
  543.  
  544. 	/** Expose `punycode` */
  545. 	// Some AMD build optimizers, like r.js, check for specific condition patterns
  546. 	// like the following:
  547. 	if (
  548. 		typeof define == 'function' &&
  549. 		typeof define.amd == 'object' &&
  550. 		define.amd
  551. 	) {
  552. 		define('punycode', function() {
  553. 			return punycode;
  554. 		});
  555. 	} else if (freeExports && freeModule) {
  556. 		if (module.exports == freeExports) { // in Node.js or RingoJS v0.8.0+
  557. 			freeModule.exports = punycode;
  558. 		} else { // in Narwhal or RingoJS v0.7.0-
  559. 			for (key in punycode) {
  560. 				punycode.hasOwnProperty(key) && (freeExports[key] = punycode[key]);
  561. 			}
  562. 		}
  563. 	} else { // in Rhino or a web browser
  564. 		root.punycode = punycode;
  565. 	}
  566.  
  567. }(this));
  568.  
  569. var html2canvasNodeAttribute = "data-html2canvas-node";
  570. var html2canvasCanvasCloneAttribute = "data-html2canvas-canvas-clone";
  571. var html2canvasCanvasCloneIndex = 0;
  572. var html2canvasCloneIndex = 0;
  573.  
  574. window.html2canvas = function(nodeList, options) {
  575.     var index = html2canvasCloneIndex++;
  576.     options = options || {};
  577.     if (options.logging) {
  578.         window.html2canvas.logging = true;
  579.         window.html2canvas.start = Date.now();
  580.     }
  581.  
  582.     options.async = typeof(options.async) === "undefined" ? true : options.async;
  583.     options.allowTaint = typeof(options.allowTaint) === "undefined" ? false : options.allowTaint;
  584.     options.removeContainer = typeof(options.removeContainer) === "undefined" ? true : options.removeContainer;
  585.     options.javascriptEnabled = typeof(options.javascriptEnabled) === "undefined" ? false : options.javascriptEnabled;
  586.     options.imageTimeout = typeof(options.imageTimeout) === "undefined" ? 10000 : options.imageTimeout;
  587.     options.renderer = typeof(options.renderer) === "function" ? options.renderer : CanvasRenderer;
  588.     options.strict = !!options.strict;
  589.  
  590.     if (typeof(nodeList) === "string") {
  591.         if (typeof(options.proxy) !== "string") {
  592.             return Promise.reject("Proxy must be used when rendering url");
  593.         }
  594.         var width = options.width != null ? options.width : window.innerWidth;
  595.         var height = options.height != null ? options.height : window.innerHeight;
  596.         return loadUrlDocument(absoluteUrl(nodeList), options.proxy, document, width, height, options).then(function(container) {
  597.             return renderWindow(container.contentWindow.document.documentElement, container, options, width, height);
  598.         });
  599.     }
  600.  
  601.     var node = ((nodeList === undefined) ? [document.documentElement] : ((nodeList.length) ? nodeList : [nodeList]))[0];
  602.     node.setAttribute(html2canvasNodeAttribute + index, index);
  603.     return renderDocument(node.ownerDocument, options, node.ownerDocument.defaultView.innerWidth, node.ownerDocument.defaultView.innerHeight, index).then(function(canvas) {
  604.         if (typeof(options.onrendered) === "function") {
  605.             log("options.onrendered is deprecated, html2canvas returns a Promise containing the canvas");
  606.             options.onrendered(canvas);
  607.         }
  608.         return canvas;
  609.     });
  610. };
  611.  
  612. window.html2canvas.punycode = this.punycode;
  613. window.html2canvas.proxy = {};
  614.  
  615. function renderDocument(document, options, windowWidth, windowHeight, html2canvasIndex) {
  616.     return createWindowClone(document, document, windowWidth, windowHeight, options, document.defaultView.pageXOffset, document.defaultView.pageYOffset).then(function(container) {
  617.         log("Document cloned");
  618.         var attributeName = html2canvasNodeAttribute + html2canvasIndex;
  619.         var selector = "[" + attributeName + "='" + html2canvasIndex + "']";
  620.         document.querySelector(selector).removeAttribute(attributeName);
  621.         var clonedWindow = container.contentWindow;
  622.         var node = clonedWindow.document.querySelector(selector);
  623.         var oncloneHandler = (typeof(options.onclone) === "function") ? Promise.resolve(options.onclone(clonedWindow.document)) : Promise.resolve(true);
  624.         return oncloneHandler.then(function() {
  625.             return renderWindow(node, container, options, windowWidth, windowHeight);
  626.         });
  627.     });
  628. }
  629.  
  630. function renderWindow(node, container, options, windowWidth, windowHeight) {
  631.     var clonedWindow = container.contentWindow;
  632.     var support = new Support(clonedWindow.document);
  633.     var imageLoader = new ImageLoader(options, support);
  634.     var bounds = getBounds(node);
  635.     var width = options.type === "view" ? windowWidth : documentWidth(clonedWindow.document);
  636.     var height = options.type === "view" ? windowHeight : documentHeight(clonedWindow.document);
  637.     var renderer = new options.renderer(width, height, imageLoader, options, document);
  638.     var parser = new NodeParser(node, renderer, support, imageLoader, options);
  639.     return parser.ready.then(function() {
  640.         log("Finished rendering");
  641.         var canvas;
  642.  
  643.         if (options.type === "view") {
  644.             canvas = crop(renderer.canvas, {width: renderer.canvas.width, height: renderer.canvas.height, top: 0, left: 0, x: 0, y: 0});
  645.         } else if (node === clonedWindow.document.body || node === clonedWindow.document.documentElement || options.canvas != null) {
  646.             canvas = renderer.canvas;
  647.         } else {
  648.             canvas = crop(renderer.canvas, {width:  options.width != null ? options.width : bounds.width, height: options.height != null ? options.height : bounds.height, top: bounds.top, left: bounds.left, x: clonedWindow.pageXOffset, y: clonedWindow.pageYOffset});
  649.         }
  650.  
  651.         cleanupContainer(container, options);
  652.         return canvas;
  653.     });
  654. }
  655.  
  656. function cleanupContainer(container, options) {
  657.     if (options.removeContainer) {
  658.         container.parentNode.removeChild(container);
  659.         log("Cleaned up container");
  660.     }
  661. }
  662.  
  663. function crop(canvas, bounds) {
  664.     var croppedCanvas = document.createElement("canvas");
  665.     var x1 = Math.min(canvas.width - 1, Math.max(0, bounds.left));
  666.     var x2 = Math.min(canvas.width, Math.max(1, bounds.left + bounds.width));
  667.     var y1 = Math.min(canvas.height - 1, Math.max(0, bounds.top));
  668.     var y2 = Math.min(canvas.height, Math.max(1, bounds.top + bounds.height));
  669.     croppedCanvas.width = bounds.width;
  670.     croppedCanvas.height =  bounds.height;
  671.     log("Cropping canvas at:", "left:", bounds.left, "top:", bounds.top, "width:", (x2-x1), "height:", (y2-y1));
  672.     log("Resulting crop with width", bounds.width, "and height", bounds.height, " with x", x1, "and y", y1);
  673.     croppedCanvas.getContext("2d").drawImage(canvas, x1, y1, x2-x1, y2-y1, bounds.x, bounds.y, x2-x1, y2-y1);
  674.     return croppedCanvas;
  675. }
  676.  
  677. function documentWidth (doc) {
  678.     return Math.max(
  679.         Math.max(doc.body.scrollWidth, doc.documentElement.scrollWidth),
  680.         Math.max(doc.body.offsetWidth, doc.documentElement.offsetWidth),
  681.         Math.max(doc.body.clientWidth, doc.documentElement.clientWidth)
  682.     );
  683. }
  684.  
  685. function documentHeight (doc) {
  686.     return Math.max(
  687.         Math.max(doc.body.scrollHeight, doc.documentElement.scrollHeight),
  688.         Math.max(doc.body.offsetHeight, doc.documentElement.offsetHeight),
  689.         Math.max(doc.body.clientHeight, doc.documentElement.clientHeight)
  690.     );
  691. }
  692.  
  693. function smallImage() {
  694.     return "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7";
  695. }
  696.  
  697. function isIE9() {
  698.     return document.documentMode && document.documentMode <= 9;
  699. }
  700.  
  701. // https://github.com/niklasvh/html2canvas/issues/503
  702. function cloneNodeIE9(node, javascriptEnabled) {
  703.     var clone = node.nodeType === 3 ? document.createTextNode(node.nodeValue) : node.cloneNode(false);
  704.  
  705.     var child = node.firstChild;
  706.     while(child) {
  707.         if (javascriptEnabled === true || child.nodeType !== 1 || child.nodeName !== 'SCRIPT') {
  708.             clone.appendChild(cloneNodeIE9(child, javascriptEnabled));
  709.         }
  710.         child = child.nextSibling;
  711.     }
  712.  
  713.     return clone;
  714. }
  715.  
  716. function createWindowClone(ownerDocument, containerDocument, width, height, options, x ,y) {
  717.     labelCanvasElements(ownerDocument);
  718.     var documentElement = isIE9() ? cloneNodeIE9(ownerDocument.documentElement, options.javascriptEnabled) : ownerDocument.documentElement.cloneNode(true);
  719.     var container = containerDocument.createElement("iframe");
  720.  
  721.     container.className = "html2canvas-container";
  722.     container.style.visibility = "hidden";
  723.     container.style.position = "fixed";
  724.     container.style.left = "-10000px";
  725.     container.style.top = "0px";
  726.     container.style.border = "0";
  727.     container.width = width;
  728.     container.height = height;
  729.     container.scrolling = "no"; // ios won't scroll without it
  730.     containerDocument.body.appendChild(container);
  731.  
  732.     return new Promise(function(resolve) {
  733.         var documentClone = container.contentWindow.document;
  734.  
  735.         cloneNodeValues(ownerDocument.documentElement, documentElement, "textarea");
  736.         cloneNodeValues(ownerDocument.documentElement, documentElement, "select");
  737.  
  738.         /* Chrome doesn't detect relative background-images assigned in inline <style> sheets when fetched through getComputedStyle
  739.          if window url is about:blank, we can assign the url to current by writing onto the document
  740.          */
  741.         container.contentWindow.onload = container.onload = function() {
  742.             var interval = setInterval(function() {
  743.                 if (documentClone.body.childNodes.length > 0) {
  744.                     cloneCanvasContents(ownerDocument, documentClone);
  745.                     clearInterval(interval);
  746.                     if (options.type === "view") {
  747.                         container.contentWindow.scrollTo(x, y);
  748.                     }
  749.                     resolve(container);
  750.                 }
  751.             }, 50);
  752.         };
  753.  
  754.         documentClone.open();
  755.         documentClone.write("<!DOCTYPE html><html></html>");
  756.         // Chrome scrolls the parent document for some reason after the write to the cloned window???
  757.         restoreOwnerScroll(ownerDocument, x, y);
  758.         documentClone.replaceChild(options.javascriptEnabled === true ? documentClone.adoptNode(documentElement) : removeScriptNodes(documentClone.adoptNode(documentElement)), documentClone.documentElement);
  759.         documentClone.close();
  760.     });
  761. }
  762.  
  763. function cloneNodeValues(document, clone, nodeName) {
  764.     var originalNodes = document.getElementsByTagName(nodeName);
  765.     var clonedNodes = clone.getElementsByTagName(nodeName);
  766.     var count = originalNodes.length;
  767.     for (var i = 0; i < count; i++) {
  768.         clonedNodes[i].value = originalNodes[i].value;
  769.     }
  770. }
  771.  
  772. function restoreOwnerScroll(ownerDocument, x, y) {
  773.     if (ownerDocument.defaultView && (x !== ownerDocument.defaultView.pageXOffset || y !== ownerDocument.defaultView.pageYOffset)) {
  774.         ownerDocument.defaultView.scrollTo(x, y);
  775.     }
  776. }
  777.  
  778. function loadUrlDocument(src, proxy, document, width, height, options) {
  779.     return new Proxy(src, proxy, window.document).then(documentFromHTML(src)).then(function(doc) {
  780.         return createWindowClone(doc, document, width, height, options, 0, 0);
  781.     });
  782. }
  783.  
  784. function documentFromHTML(src) {
  785.     return function(html) {
  786.         var parser = new DOMParser(), doc;
  787.         try {
  788.             doc = parser.parseFromString(html, "text/html");
  789.         } catch(e) {
  790.             log("DOMParser not supported, falling back to createHTMLDocument");
  791.             doc = document.implementation.createHTMLDocument("");
  792.             try {
  793.                 doc.open();
  794.                 doc.write(html);
  795.                 doc.close();
  796.             } catch(ee) {
  797.                 log("createHTMLDocument write not supported, falling back to document.body.innerHTML");
  798.                 doc.body.innerHTML = html; // ie9 doesnt support writing to documentElement
  799.             }
  800.         }
  801.  
  802.         var b = doc.querySelector("base");
  803.         if (!b || !b.href.host) {
  804.             var base = doc.createElement("base");
  805.             base.href = src;
  806.             doc.head.insertBefore(base, doc.head.firstChild);
  807.         }
  808.  
  809.         return doc;
  810.     };
  811. }
  812.  
  813.  
  814. function labelCanvasElements(ownerDocument) {
  815.     [].slice.call(ownerDocument.querySelectorAll("canvas"), 0).forEach(function(canvas) {
  816.         canvas.setAttribute(html2canvasCanvasCloneAttribute, "canvas-" + html2canvasCanvasCloneIndex++);
  817.     });
  818. }
  819.  
  820. function cloneCanvasContents(ownerDocument, documentClone) {
  821.     [].slice.call(ownerDocument.querySelectorAll("[" + html2canvasCanvasCloneAttribute + "]"), 0).forEach(function(canvas) {
  822.         try {
  823.             var clonedCanvas = documentClone.querySelector('[' + html2canvasCanvasCloneAttribute + '="' + canvas.getAttribute(html2canvasCanvasCloneAttribute) + '"]');
  824.             if (clonedCanvas) {
  825.                 clonedCanvas.width = canvas.width;
  826.                 clonedCanvas.height = canvas.height;
  827.                 clonedCanvas.getContext("2d").putImageData(canvas.getContext("2d").getImageData(0, 0, canvas.width, canvas.height), 0, 0);
  828.             }
  829.         } catch(e) {
  830.             log("Unable to copy canvas content from", canvas, e);
  831.         }
  832.         canvas.removeAttribute(html2canvasCanvasCloneAttribute);
  833.     });
  834. }
  835.  
  836. function removeScriptNodes(parent) {
  837.     [].slice.call(parent.childNodes, 0).filter(isElementNode).forEach(function(node) {
  838.         if (node.tagName === "SCRIPT") {
  839.             parent.removeChild(node);
  840.         } else {
  841.             removeScriptNodes(node);
  842.         }
  843.     });
  844.     return parent;
  845. }
  846.  
  847. function isElementNode(node) {
  848.     return node.nodeType === Node.ELEMENT_NODE;
  849. }
  850.  
  851. function absoluteUrl(url) {
  852.     var link = document.createElement("a");
  853.     link.href = url;
  854.     link.href = link.href;
  855.     return link;
  856. }
  857.  
  858. // http://dev.w3.org/csswg/css-color/
  859.  
  860. function Color(value) {
  861.     this.r = 0;
  862.     this.g = 0;
  863.     this.b = 0;
  864.     this.a = null;
  865.     var result = this.fromArray(value) ||
  866.         this.namedColor(value) ||
  867.         this.rgb(value) ||
  868.         this.rgba(value) ||
  869.         this.hex6(value) ||
  870.         this.hex3(value);
  871. }
  872.  
  873. Color.prototype.darken = function(amount) {
  874.     var a = 1 - amount;
  875.     return  new Color([
  876.         Math.round(this.r * a),
  877.         Math.round(this.g * a),
  878.         Math.round(this.b * a),
  879.         this.a
  880.     ]);
  881. };
  882.  
  883. Color.prototype.isTransparent = function() {
  884.     return this.a === 0;
  885. };
  886.  
  887. Color.prototype.isBlack = function() {
  888.     return this.r === 0 && this.g === 0 && this.b === 0;
  889. };
  890.  
  891. Color.prototype.fromArray = function(array) {
  892.     if (Array.isArray(array)) {
  893.         this.r = Math.min(array[0], 255);
  894.         this.g = Math.min(array[1], 255);
  895.         this.b = Math.min(array[2], 255);
  896.         if (array.length > 3) {
  897.             this.a = array[3];
  898.         }
  899.     }
  900.  
  901.     return (Array.isArray(array));
  902. };
  903.  
  904. var _hex3 = /^#([a-f0-9]{3})$/i;
  905.  
  906. Color.prototype.hex3 = function(value) {
  907.     var match = null;
  908.     if ((match = value.match(_hex3)) !== null) {
  909.         this.r = parseInt(match[1][0] + match[1][0], 16);
  910.         this.g = parseInt(match[1][1] + match[1][1], 16);
  911.         this.b = parseInt(match[1][2] + match[1][2], 16);
  912.     }
  913.     return match !== null;
  914. };
  915.  
  916. var _hex6 = /^#([a-f0-9]{6})$/i;
  917.  
  918. Color.prototype.hex6 = function(value) {
  919.     var match = null;
  920.     if ((match = value.match(_hex6)) !== null) {
  921.         this.r = parseInt(match[1].substring(0, 2), 16);
  922.         this.g = parseInt(match[1].substring(2, 4), 16);
  923.         this.b = parseInt(match[1].substring(4, 6), 16);
  924.     }
  925.     return match !== null;
  926. };
  927.  
  928.  
  929. var _rgb = /^rgb\((\d{1,3}) *, *(\d{1,3}) *, *(\d{1,3})\)$/;
  930.  
  931. Color.prototype.rgb = function(value) {
  932.     var match = null;
  933.     if ((match = value.match(_rgb)) !== null) {
  934.         this.r = Number(match[1]);
  935.         this.g = Number(match[2]);
  936.         this.b = Number(match[3]);
  937.     }
  938.     return match !== null;
  939. };
  940.  
  941. var _rgba = /^rgba\((\d{1,3}) *, *(\d{1,3}) *, *(\d{1,3}) *, *(\d+\.?\d*)\)$/;
  942.  
  943. Color.prototype.rgba = function(value) {
  944.     var match = null;
  945.     if ((match = value.match(_rgba)) !== null) {
  946.         this.r = Number(match[1]);
  947.         this.g = Number(match[2]);
  948.         this.b = Number(match[3]);
  949.         this.a = Number(match[4]);
  950.     }
  951.     return match !== null;
  952. };
  953.  
  954. Color.prototype.toString = function() {
  955.     return this.a !== null && this.a !== 1 ?
  956.     "rgba(" + [this.r, this.g, this.b, this.a].join(",") + ")" :
  957.     "rgb(" + [this.r, this.g, this.b].join(",") + ")";
  958. };
  959.  
  960. Color.prototype.namedColor = function(value) {
  961.     var color = colors[value.toLowerCase()];
  962.     if (color) {
  963.         this.r = color[0];
  964.         this.g = color[1];
  965.         this.b = color[2];
  966.     } else if (value.toLowerCase() === "transparent") {
  967.         this.r = this.g = this.b = this.a = 0;
  968.         return true;
  969.     }
  970.  
  971.     return !!color;
  972. };
  973.  
  974. Color.prototype.isColor = true;
  975.  
  976. // JSON.stringify([].slice.call($$('.named-color-table tr'), 1).map(function(row) { return [row.childNodes[3].textContent, row.childNodes[5].textContent.trim().split(",").map(Number)] }).reduce(function(data, row) {data[row[0]] = row[1]; return data}, {}))
  977. var colors = {
  978.     "aliceblue": [240, 248, 255],
  979.     "antiquewhite": [250, 235, 215],
  980.     "aqua": [0, 255, 255],
  981.     "aquamarine": [127, 255, 212],
  982.     "azure": [240, 255, 255],
  983.     "beige": [245, 245, 220],
  984.     "bisque": [255, 228, 196],
  985.     "black": [0, 0, 0],
  986.     "blanchedalmond": [255, 235, 205],
  987.     "blue": [0, 0, 255],
  988.     "blueviolet": [138, 43, 226],
  989.     "brown": [165, 42, 42],
  990.     "burlywood": [222, 184, 135],
  991.     "cadetblue": [95, 158, 160],
  992.     "chartreuse": [127, 255, 0],
  993.     "chocolate": [210, 105, 30],
  994.     "coral": [255, 127, 80],
  995.     "cornflowerblue": [100, 149, 237],
  996.     "cornsilk": [255, 248, 220],
  997.     "crimson": [220, 20, 60],
  998.     "cyan": [0, 255, 255],
  999.     "darkblue": [0, 0, 139],
  1000.     "darkcyan": [0, 139, 139],
  1001.     "darkgoldenrod": [184, 134, 11],
  1002.     "darkgray": [169, 169, 169],
  1003.     "darkgreen": [0, 100, 0],
  1004.     "darkgrey": [169, 169, 169],
  1005.     "darkkhaki": [189, 183, 107],
  1006.     "darkmagenta": [139, 0, 139],
  1007.     "darkolivegreen": [85, 107, 47],
  1008.     "darkorange": [255, 140, 0],
  1009.     "darkorchid": [153, 50, 204],
  1010.     "darkred": [139, 0, 0],
  1011.     "darksalmon": [233, 150, 122],
  1012.     "darkseagreen": [143, 188, 143],
  1013.     "darkslateblue": [72, 61, 139],
  1014.     "darkslategray": [47, 79, 79],
  1015.     "darkslategrey": [47, 79, 79],
  1016.     "darkturquoise": [0, 206, 209],
  1017.     "darkviolet": [148, 0, 211],
  1018.     "deeppink": [255, 20, 147],
  1019.     "deepskyblue": [0, 191, 255],
  1020.     "dimgray": [105, 105, 105],
  1021.     "dimgrey": [105, 105, 105],
  1022.     "dodgerblue": [30, 144, 255],
  1023.     "firebrick": [178, 34, 34],
  1024.     "floralwhite": [255, 250, 240],
  1025.     "forestgreen": [34, 139, 34],
  1026.     "fuchsia": [255, 0, 255],
  1027.     "gainsboro": [220, 220, 220],
  1028.     "ghostwhite": [248, 248, 255],
  1029.     "gold": [255, 215, 0],
  1030.     "goldenrod": [218, 165, 32],
  1031.     "gray": [128, 128, 128],
  1032.     "green": [0, 128, 0],
  1033.     "greenyellow": [173, 255, 47],
  1034.     "grey": [128, 128, 128],
  1035.     "honeydew": [240, 255, 240],
  1036.     "hotpink": [255, 105, 180],
  1037.     "indianred": [205, 92, 92],
  1038.     "indigo": [75, 0, 130],
  1039.     "ivory": [255, 255, 240],
  1040.     "khaki": [240, 230, 140],
  1041.     "lavender": [230, 230, 250],
  1042.     "lavenderblush": [255, 240, 245],
  1043.     "lawngreen": [124, 252, 0],
  1044.     "lemonchiffon": [255, 250, 205],
  1045.     "lightblue": [173, 216, 230],
  1046.     "lightcoral": [240, 128, 128],
  1047.     "lightcyan": [224, 255, 255],
  1048.     "lightgoldenrodyellow": [250, 250, 210],
  1049.     "lightgray": [211, 211, 211],
  1050.     "lightgreen": [144, 238, 144],
  1051.     "lightgrey": [211, 211, 211],
  1052.     "lightpink": [255, 182, 193],
  1053.     "lightsalmon": [255, 160, 122],
  1054.     "lightseagreen": [32, 178, 170],
  1055.     "lightskyblue": [135, 206, 250],
  1056.     "lightslategray": [119, 136, 153],
  1057.     "lightslategrey": [119, 136, 153],
  1058.     "lightsteelblue": [176, 196, 222],
  1059.     "lightyellow": [255, 255, 224],
  1060.     "lime": [0, 255, 0],
  1061.     "limegreen": [50, 205, 50],
  1062.     "linen": [250, 240, 230],
  1063.     "magenta": [255, 0, 255],
  1064.     "maroon": [128, 0, 0],
  1065.     "mediumaquamarine": [102, 205, 170],
  1066.     "mediumblue": [0, 0, 205],
  1067.     "mediumorchid": [186, 85, 211],
  1068.     "mediumpurple": [147, 112, 219],
  1069.     "mediumseagreen": [60, 179, 113],
  1070.     "mediumslateblue": [123, 104, 238],
  1071.     "mediumspringgreen": [0, 250, 154],
  1072.     "mediumturquoise": [72, 209, 204],
  1073.     "mediumvioletred": [199, 21, 133],
  1074.     "midnightblue": [25, 25, 112],
  1075.     "mintcream": [245, 255, 250],
  1076.     "mistyrose": [255, 228, 225],
  1077.     "moccasin": [255, 228, 181],
  1078.     "navajowhite": [255, 222, 173],
  1079.     "navy": [0, 0, 128],
  1080.     "oldlace": [253, 245, 230],
  1081.     "olive": [128, 128, 0],
  1082.     "olivedrab": [107, 142, 35],
  1083.     "orange": [255, 165, 0],
  1084.     "orangered": [255, 69, 0],
  1085.     "orchid": [218, 112, 214],
  1086.     "palegoldenrod": [238, 232, 170],
  1087.     "palegreen": [152, 251, 152],
  1088.     "paleturquoise": [175, 238, 238],
  1089.     "palevioletred": [219, 112, 147],
  1090.     "papayawhip": [255, 239, 213],
  1091.     "peachpuff": [255, 218, 185],
  1092.     "peru": [205, 133, 63],
  1093.     "pink": [255, 192, 203],
  1094.     "plum": [221, 160, 221],
  1095.     "powderblue": [176, 224, 230],
  1096.     "purple": [128, 0, 128],
  1097.     "rebeccapurple": [102, 51, 153],
  1098.     "red": [255, 0, 0],
  1099.     "rosybrown": [188, 143, 143],
  1100.     "royalblue": [65, 105, 225],
  1101.     "saddlebrown": [139, 69, 19],
  1102.     "salmon": [250, 128, 114],
  1103.     "sandybrown": [244, 164, 96],
  1104.     "seagreen": [46, 139, 87],
  1105.     "seashell": [255, 245, 238],
  1106.     "sienna": [160, 82, 45],
  1107.     "silver": [192, 192, 192],
  1108.     "skyblue": [135, 206, 235],
  1109.     "slateblue": [106, 90, 205],
  1110.     "slategray": [112, 128, 144],
  1111.     "slategrey": [112, 128, 144],
  1112.     "snow": [255, 250, 250],
  1113.     "springgreen": [0, 255, 127],
  1114.     "steelblue": [70, 130, 180],
  1115.     "tan": [210, 180, 140],
  1116.     "teal": [0, 128, 128],
  1117.     "thistle": [216, 191, 216],
  1118.     "tomato": [255, 99, 71],
  1119.     "turquoise": [64, 224, 208],
  1120.     "violet": [238, 130, 238],
  1121.     "wheat": [245, 222, 179],
  1122.     "white": [255, 255, 255],
  1123.     "whitesmoke": [245, 245, 245],
  1124.     "yellow": [255, 255, 0],
  1125.     "yellowgreen": [154, 205, 50]
  1126. };
  1127.  
  1128.  
  1129. function DummyImageContainer(src) {
  1130.     this.src = src;
  1131.     log("DummyImageContainer for", src);
  1132.     if (!this.promise || !this.image) {
  1133.         log("Initiating DummyImageContainer");
  1134.         DummyImageContainer.prototype.image = new Image();
  1135.         var image = this.image;
  1136.         DummyImageContainer.prototype.promise = new Promise(function(resolve, reject) {
  1137.             image.onload = resolve;
  1138.             image.onerror = reject;
  1139.             image.src = smallImage();
  1140.             if (image.complete === true) {
  1141.                 resolve(image);
  1142.             }
  1143.         });
  1144.     }
  1145. }
  1146.  
  1147. function Font(family, size) {
  1148.     var container = document.createElement('div'),
  1149.         img = document.createElement('img'),
  1150.         span = document.createElement('span'),
  1151.         sampleText = 'Hidden Text',
  1152.         baseline,
  1153.         middle;
  1154.  
  1155.     container.style.visibility = "hidden";
  1156.     container.style.fontFamily = family;
  1157.     container.style.fontSize = size;
  1158.     container.style.margin = 0;
  1159.     container.style.padding = 0;
  1160.  
  1161.     document.body.appendChild(container);
  1162.  
  1163.     img.src = smallImage();
  1164.     img.width = 1;
  1165.     img.height = 1;
  1166.  
  1167.     img.style.margin = 0;
  1168.     img.style.padding = 0;
  1169.     img.style.verticalAlign = "baseline";
  1170.  
  1171.     span.style.fontFamily = family;
  1172.     span.style.fontSize = size;
  1173.     span.style.margin = 0;
  1174.     span.style.padding = 0;
  1175.  
  1176.     span.appendChild(document.createTextNode(sampleText));
  1177.     container.appendChild(span);
  1178.     container.appendChild(img);
  1179.     baseline = (img.offsetTop - span.offsetTop) + 1;
  1180.  
  1181.     container.removeChild(span);
  1182.     container.appendChild(document.createTextNode(sampleText));
  1183.  
  1184.     container.style.lineHeight = "normal";
  1185.     img.style.verticalAlign = "super";
  1186.  
  1187.     middle = (img.offsetTop-container.offsetTop) + 1;
  1188.  
  1189.     document.body.removeChild(container);
  1190.  
  1191.     this.baseline = baseline;
  1192.     this.lineWidth = 1;
  1193.     this.middle = middle;
  1194. }
  1195.  
  1196. function FontMetrics() {
  1197.     this.data = {};
  1198. }
  1199.  
  1200. FontMetrics.prototype.getMetrics = function(family, size) {
  1201.     if (this.data[family + "-" + size] === undefined) {
  1202.         this.data[family + "-" + size] = new Font(family, size);
  1203.     }
  1204.     return this.data[family + "-" + size];
  1205. };
  1206.  
  1207. function FrameContainer(container, sameOrigin, options) {
  1208.     this.image = null;
  1209.     this.src = container;
  1210.     var self = this;
  1211.     var bounds = getBounds(container);
  1212.     this.promise = (!sameOrigin ? this.proxyLoad(options.proxy, bounds, options) : new Promise(function(resolve) {
  1213.         if (container.contentWindow.document.URL === "about:blank" || container.contentWindow.document.documentElement == null) {
  1214.             container.contentWindow.onload = container.onload = function() {
  1215.                 resolve(container);
  1216.             };
  1217.         } else {
  1218.             resolve(container);
  1219.         }
  1220.     })).then(function(container) {
  1221.         return html2canvas(container.contentWindow.document.documentElement, {type: 'view', width: container.width, height: container.height, proxy: options.proxy, javascriptEnabled: options.javascriptEnabled, removeContainer: options.removeContainer, allowTaint: options.allowTaint, imageTimeout: options.imageTimeout / 2});
  1222.     }).then(function(canvas) {
  1223.         return self.image = canvas;
  1224.     });
  1225. }
  1226.  
  1227. FrameContainer.prototype.proxyLoad = function(proxy, bounds, options) {
  1228.     var container = this.src;
  1229.     return loadUrlDocument(container.src, proxy, container.ownerDocument, bounds.width, bounds.height, options);
  1230. };
  1231.  
  1232. function GradientContainer(imageData) {
  1233.     this.src = imageData.value;
  1234.     this.colorStops = [];
  1235.     this.type = null;
  1236.     this.x0 = 0.5;
  1237.     this.y0 = 0.5;
  1238.     this.x1 = 0.5;
  1239.     this.y1 = 0.5;
  1240.     this.promise = Promise.resolve(true);
  1241. }
  1242.  
  1243. GradientContainer.prototype.TYPES = {
  1244.     LINEAR: 1,
  1245.     RADIAL: 2
  1246. };
  1247.  
  1248. function ImageContainer(src, cors) {
  1249.     this.src = src;
  1250.     this.image = new Image();
  1251.     var self = this;
  1252.     this.tainted = null;
  1253.     this.promise = new Promise(function(resolve, reject) {
  1254.         self.image.onload = resolve;
  1255.         self.image.onerror = reject;
  1256.         if (cors) {
  1257.             self.image.crossOrigin = "anonymous";
  1258.         }
  1259.         self.image.src = src;
  1260.         if (self.image.complete === true) {
  1261.             resolve(self.image);
  1262.         }
  1263.     });
  1264. }
  1265.  
  1266. function ImageLoader(options, support) {
  1267.     this.link = null;
  1268.     this.options = options;
  1269.     this.support = support;
  1270.     this.origin = this.getOrigin(window.location.href);
  1271. }
  1272.  
  1273. ImageLoader.prototype.findImages = function(nodes) {
  1274.     var images = [];
  1275.     nodes.reduce(function(imageNodes, container) {
  1276.         switch(container.node.nodeName) {
  1277.         case "IMG":
  1278.             return imageNodes.concat([{
  1279.                 args: [container.node.src],
  1280.                 method: "url"
  1281.             }]);
  1282.         case "svg":
  1283.         case "IFRAME":
  1284.             return imageNodes.concat([{
  1285.                 args: [container.node],
  1286.                 method: container.node.nodeName
  1287.             }]);
  1288.         }
  1289.         return imageNodes;
  1290.     }, []).forEach(this.addImage(images, this.loadImage), this);
  1291.     return images;
  1292. };
  1293.  
  1294. ImageLoader.prototype.findBackgroundImage = function(images, container) {
  1295.     container.parseBackgroundImages().filter(this.hasImageBackground).forEach(this.addImage(images, this.loadImage), this);
  1296.     return images;
  1297. };
  1298.  
  1299. ImageLoader.prototype.addImage = function(images, callback) {
  1300.     return function(newImage) {
  1301.         newImage.args.forEach(function(image) {
  1302.             if (!this.imageExists(images, image)) {
  1303.                 images.splice(0, 0, callback.call(this, newImage));
  1304.                 log('Added image #' + (images.length), typeof(image) === "string" ? image.substring(0, 100) : image);
  1305.             }
  1306.         }, this);
  1307.     };
  1308. };
  1309.  
  1310. ImageLoader.prototype.hasImageBackground = function(imageData) {
  1311.     return imageData.method !== "none";
  1312. };
  1313.  
  1314. ImageLoader.prototype.loadImage = function(imageData) {
  1315.     if (imageData.method === "url") {
  1316.         var src = imageData.args[0];
  1317.         if (this.isSVG(src) && !this.support.svg && !this.options.allowTaint) {
  1318.             return new SVGContainer(src);
  1319.         } else if (src.match(/data:image\/.*;base64,/i)) {
  1320.             return new ImageContainer(src.replace(/url\(['"]{0,}|['"]{0,}\)$/ig, ''), false);
  1321.         } else if (this.isSameOrigin(src) || this.options.allowTaint === true || this.isSVG(src)) {
  1322.             return new ImageContainer(src, false);
  1323.         } else if (this.support.cors && !this.options.allowTaint && this.options.useCORS) {
  1324.             return new ImageContainer(src, true);
  1325.         } else if (this.options.proxy) {
  1326.             return new ProxyImageContainer(src, this.options.proxy);
  1327.         } else {
  1328.             return new DummyImageContainer(src);
  1329.         }
  1330.     } else if (imageData.method === "linear-gradient") {
  1331.         return new LinearGradientContainer(imageData);
  1332.     } else if (imageData.method === "gradient") {
  1333.         return new WebkitGradientContainer(imageData);
  1334.     } else if (imageData.method === "svg") {
  1335.         return new SVGNodeContainer(imageData.args[0], this.support.svg);
  1336.     } else if (imageData.method === "IFRAME") {
  1337.         return new FrameContainer(imageData.args[0], this.isSameOrigin(imageData.args[0].src), this.options);
  1338.     } else {
  1339.         return new DummyImageContainer(imageData);
  1340.     }
  1341. };
  1342.  
  1343. ImageLoader.prototype.isSVG = function(src) {
  1344.     return src.substring(src.length - 3).toLowerCase() === "svg" || SVGContainer.prototype.isInline(src);
  1345. };
  1346.  
  1347. ImageLoader.prototype.imageExists = function(images, src) {
  1348.     return images.some(function(image) {
  1349.         return image.src === src;
  1350.     });
  1351. };
  1352.  
  1353. ImageLoader.prototype.isSameOrigin = function(url) {
  1354.     return (this.getOrigin(url) === this.origin);
  1355. };
  1356.  
  1357. ImageLoader.prototype.getOrigin = function(url) {
  1358.     var link = this.link || (this.link = document.createElement("a"));
  1359.     link.href = url;
  1360.     link.href = link.href; // IE9, LOL! - http://jsfiddle.net/niklasvh/2e48b/
  1361.     return link.protocol + link.hostname + link.port;
  1362. };
  1363.  
  1364. ImageLoader.prototype.getPromise = function(container) {
  1365.     return this.timeout(container, this.options.imageTimeout)['catch'](function() {
  1366.         var dummy = new DummyImageContainer(container.src);
  1367.         return dummy.promise.then(function(image) {
  1368.             container.image = image;
  1369.         });
  1370.     });
  1371. };
  1372.  
  1373. ImageLoader.prototype.get = function(src) {
  1374.     var found = null;
  1375.     return this.images.some(function(img) {
  1376.         return (found = img).src === src;
  1377.     }) ? found : null;
  1378. };
  1379.  
  1380. ImageLoader.prototype.fetch = function(nodes) {
  1381.     this.images = nodes.reduce(bind(this.findBackgroundImage, this), this.findImages(nodes));
  1382.     this.images.forEach(function(image, index) {
  1383.         image.promise.then(function() {
  1384.             log("Succesfully loaded image #"+ (index+1), image);
  1385.         }, function(e) {
  1386.             log("Failed loading image #"+ (index+1), image, e);
  1387.         });
  1388.     });
  1389.     this.ready = Promise.all(this.images.map(this.getPromise, this));
  1390.     log("Finished searching images");
  1391.     return this;
  1392. };
  1393.  
  1394. ImageLoader.prototype.timeout = function(container, timeout) {
  1395.     var timer;
  1396.     var promise = Promise.race([container.promise, new Promise(function(res, reject) {
  1397.         timer = setTimeout(function() {
  1398.             log("Timed out loading image", container);
  1399.             reject(container);
  1400.         }, timeout);
  1401.     })]).then(function(container) {
  1402.         clearTimeout(timer);
  1403.         return container;
  1404.     });
  1405.     promise['catch'](function() {
  1406.         clearTimeout(timer);
  1407.     });
  1408.     return promise;
  1409. };
  1410.  
  1411. function LinearGradientContainer(imageData) {
  1412.     GradientContainer.apply(this, arguments);
  1413.     this.type = this.TYPES.LINEAR;
  1414.  
  1415.     var hasDirection = imageData.args[0].match(this.stepRegExp) === null;
  1416.  
  1417.     if (hasDirection) {
  1418.         imageData.args[0].split(" ").reverse().forEach(function(position) {
  1419.             switch(position) {
  1420.             case "left":
  1421.                 this.x0 = 0;
  1422.                 this.x1 = 1;
  1423.                 break;
  1424.             case "top":
  1425.                 this.y0 = 0;
  1426.                 this.y1 = 1;
  1427.                 break;
  1428.             case "right":
  1429.                 this.x0 = 1;
  1430.                 this.x1 = 0;
  1431.                 break;
  1432.             case "bottom":
  1433.                 this.y0 = 1;
  1434.                 this.y1 = 0;
  1435.                 break;
  1436.             case "to":
  1437.                 var y0 = this.y0;
  1438.                 var x0 = this.x0;
  1439.                 this.y0 = this.y1;
  1440.                 this.x0 = this.x1;
  1441.                 this.x1 = x0;
  1442.                 this.y1 = y0;
  1443.                 break;
  1444.             }
  1445.         }, this);
  1446.     } else {
  1447.         this.y0 = 0;
  1448.         this.y1 = 1;
  1449.     }
  1450.  
  1451.     this.colorStops = imageData.args.slice(hasDirection ? 1 : 0).map(function(colorStop) {
  1452.         var colorStopMatch = colorStop.match(this.stepRegExp);
  1453.         return {
  1454.             color: new Color(colorStopMatch[1]),
  1455.             stop: colorStopMatch[3] === "%" ? colorStopMatch[2] / 100 : null
  1456.         };
  1457.     }, this);
  1458.  
  1459.     if (this.colorStops[0].stop === null) {
  1460.         this.colorStops[0].stop = 0;
  1461.     }
  1462.  
  1463.     if (this.colorStops[this.colorStops.length - 1].stop === null) {
  1464.         this.colorStops[this.colorStops.length - 1].stop = 1;
  1465.     }
  1466.  
  1467.     this.colorStops.forEach(function(colorStop, index) {
  1468.         if (colorStop.stop === null) {
  1469.             this.colorStops.slice(index).some(function(find, count) {
  1470.                 if (find.stop !== null) {
  1471.                     colorStop.stop = ((find.stop - this.colorStops[index - 1].stop) / (count + 1)) + this.colorStops[index - 1].stop;
  1472.                     return true;
  1473.                 } else {
  1474.                     return false;
  1475.                 }
  1476.             }, this);
  1477.         }
  1478.     }, this);
  1479. }
  1480.  
  1481. LinearGradientContainer.prototype = Object.create(GradientContainer.prototype);
  1482.  
  1483. LinearGradientContainer.prototype.stepRegExp = /((?:rgb|rgba)\(\d{1,3},\s\d{1,3},\s\d{1,3}(?:,\s[0-9\.]+)?\))\s*(\d{1,3})?(%|px)?/;
  1484.  
  1485. function log() {
  1486.     if (window.html2canvas.logging && window.console && window.console.log) {
  1487.         Function.prototype.bind.call(window.console.log, (window.console)).apply(window.console, [(Date.now() - window.html2canvas.start) + "ms", "html2canvas:"].concat([].slice.call(arguments, 0)));
  1488.     }
  1489. }
  1490.  
  1491. function NodeContainer(node, parent) {
  1492.     this.node = node;
  1493.     this.parent = parent;
  1494.     this.stack = null;
  1495.     this.bounds = null;
  1496.     this.borders = null;
  1497.     this.clip = [];
  1498.     this.backgroundClip = [];
  1499.     this.offsetBounds = null;
  1500.     this.visible = null;
  1501.     this.computedStyles = null;
  1502.     this.colors = {};
  1503.     this.styles = {};
  1504.     this.backgroundImages = null;
  1505.     this.transformData = null;
  1506.     this.transformMatrix = null;
  1507.     this.isPseudoElement = false;
  1508.     this.opacity = null;
  1509. }
  1510.  
  1511. NodeContainer.prototype.cloneTo = function(stack) {
  1512.     stack.visible = this.visible;
  1513.     stack.borders = this.borders;
  1514.     stack.bounds = this.bounds;
  1515.     stack.clip = this.clip;
  1516.     stack.backgroundClip = this.backgroundClip;
  1517.     stack.computedStyles = this.computedStyles;
  1518.     stack.styles = this.styles;
  1519.     stack.backgroundImages = this.backgroundImages;
  1520.     stack.opacity = this.opacity;
  1521. };
  1522.  
  1523. NodeContainer.prototype.getOpacity = function() {
  1524.     return this.opacity === null ? (this.opacity = this.cssFloat('opacity')) : this.opacity;
  1525. };
  1526.  
  1527. NodeContainer.prototype.assignStack = function(stack) {
  1528.     this.stack = stack;
  1529.     stack.children.push(this);
  1530. };
  1531.  
  1532. NodeContainer.prototype.isElementVisible = function() {
  1533.     return this.node.nodeType === Node.TEXT_NODE ? this.parent.visible : (
  1534.         this.css('display') !== "none" &&
  1535.         this.css('visibility') !== "hidden" &&
  1536.         !this.node.hasAttribute("data-html2canvas-ignore") &&
  1537.         (this.node.nodeName !== "INPUT" || this.node.getAttribute("type") !== "hidden")
  1538.     );
  1539. };
  1540.  
  1541. NodeContainer.prototype.css = function(attribute) {
  1542.     if (!this.computedStyles) {
  1543.         this.computedStyles = this.isPseudoElement ? this.parent.computedStyle(this.before ? ":before" : ":after") : this.computedStyle(null);
  1544.     }
  1545.  
  1546.     return this.styles[attribute] || (this.styles[attribute] = this.computedStyles[attribute]);
  1547. };
  1548.  
  1549. NodeContainer.prototype.prefixedCss = function(attribute) {
  1550.     var prefixes = ["webkit", "moz", "ms", "o"];
  1551.     var value = this.css(attribute);
  1552.     if (value === undefined) {
  1553.         prefixes.some(function(prefix) {
  1554.             value = this.css(prefix + attribute.substr(0, 1).toUpperCase() + attribute.substr(1));
  1555.             return value !== undefined;
  1556.         }, this);
  1557.     }
  1558.     return value === undefined ? null : value;
  1559. };
  1560.  
  1561. NodeContainer.prototype.computedStyle = function(type) {
  1562.     return this.node.ownerDocument.defaultView.getComputedStyle(this.node, type);
  1563. };
  1564.  
  1565. NodeContainer.prototype.cssInt = function(attribute) {
  1566.     var value = parseInt(this.css(attribute), 10);
  1567.     return (isNaN(value)) ? 0 : value; // borders in old IE are throwing 'medium' for demo.html
  1568. };
  1569.  
  1570. NodeContainer.prototype.color = function(attribute) {
  1571.     return this.colors[attribute] || (this.colors[attribute] = new Color(this.css(attribute)));
  1572. };
  1573.  
  1574. NodeContainer.prototype.cssFloat = function(attribute) {
  1575.     var value = parseFloat(this.css(attribute));
  1576.     return (isNaN(value)) ? 0 : value;
  1577. };
  1578.  
  1579. NodeContainer.prototype.fontWeight = function() {
  1580.     var weight = this.css("fontWeight");
  1581.     switch(parseInt(weight, 10)){
  1582.     case 401:
  1583.         weight = "bold";
  1584.         break;
  1585.     case 400:
  1586.         weight = "normal";
  1587.         break;
  1588.     }
  1589.     return weight;
  1590. };
  1591.  
  1592. NodeContainer.prototype.parseClip = function() {
  1593.     var matches = this.css('clip').match(this.CLIP);
  1594.     if (matches) {
  1595.         return {
  1596.             top: parseInt(matches[1], 10),
  1597.             right: parseInt(matches[2], 10),
  1598.             bottom: parseInt(matches[3], 10),
  1599.             left: parseInt(matches[4], 10)
  1600.         };
  1601.     }
  1602.     return null;
  1603. };
  1604.  
  1605. NodeContainer.prototype.parseBackgroundImages = function() {
  1606.     return this.backgroundImages || (this.backgroundImages = parseBackgrounds(this.css("backgroundImage")));
  1607. };
  1608.  
  1609. NodeContainer.prototype.cssList = function(property, index) {
  1610.     var value = (this.css(property) || '').split(',');
  1611.     value = value[index || 0] || value[0] || 'auto';
  1612.     value = value.trim().split(' ');
  1613.     if (value.length === 1) {
  1614.         value = [value[0], value[0]];
  1615.     }
  1616.     return value;
  1617. };
  1618.  
  1619. NodeContainer.prototype.parseBackgroundSize = function(bounds, image, index) {
  1620.     var size = this.cssList("backgroundSize", index);
  1621.     var width, height;
  1622.  
  1623.     if (isPercentage(size[0])) {
  1624.         width = bounds.width * parseFloat(size[0]) / 100;
  1625.     } else if (/contain|cover/.test(size[0])) {
  1626.         var targetRatio = bounds.width / bounds.height, currentRatio = image.width / image.height;
  1627.         return (targetRatio < currentRatio ^ size[0] === 'contain') ?  {width: bounds.height * currentRatio, height: bounds.height} : {width: bounds.width, height: bounds.width / currentRatio};
  1628.     } else {
  1629.         width = parseInt(size[0], 10);
  1630.     }
  1631.  
  1632.     if (size[0] === 'auto' && size[1] === 'auto') {
  1633.         height = image.height;
  1634.     } else if (size[1] === 'auto') {
  1635.         height = width / image.width * image.height;
  1636.     } else if (isPercentage(size[1])) {
  1637.         height =  bounds.height * parseFloat(size[1]) / 100;
  1638.     } else {
  1639.         height = parseInt(size[1], 10);
  1640.     }
  1641.  
  1642.     if (size[0] === 'auto') {
  1643.         width = height / image.height * image.width;
  1644.     }
  1645.  
  1646.     return {width: width, height: height};
  1647. };
  1648.  
  1649. NodeContainer.prototype.parseBackgroundPosition = function(bounds, image, index, backgroundSize) {
  1650.     var position = this.cssList('backgroundPosition', index);
  1651.     var left, top;
  1652.  
  1653.     if (isPercentage(position[0])){
  1654.         left = (bounds.width - (backgroundSize || image).width) * (parseFloat(position[0]) / 100);
  1655.     } else {
  1656.         left = parseInt(position[0], 10);
  1657.     }
  1658.  
  1659.     if (position[1] === 'auto') {
  1660.         top = left / image.width * image.height;
  1661.     } else if (isPercentage(position[1])){
  1662.         top =  (bounds.height - (backgroundSize || image).height) * parseFloat(position[1]) / 100;
  1663.     } else {
  1664.         top = parseInt(position[1], 10);
  1665.     }
  1666.  
  1667.     if (position[0] === 'auto') {
  1668.         left = top / image.height * image.width;
  1669.     }
  1670.  
  1671.     return {left: left, top: top};
  1672. };
  1673.  
  1674. NodeContainer.prototype.parseBackgroundRepeat = function(index) {
  1675.     return this.cssList("backgroundRepeat", index)[0];
  1676. };
  1677.  
  1678. NodeContainer.prototype.parseTextShadows = function() {
  1679.     var textShadow = this.css("textShadow");
  1680.     var results = [];
  1681.  
  1682.     if (textShadow && textShadow !== 'none') {
  1683.         var shadows = textShadow.match(this.TEXT_SHADOW_PROPERTY);
  1684.         for (var i = 0; shadows && (i < shadows.length); i++) {
  1685.             var s = shadows[i].match(this.TEXT_SHADOW_VALUES);
  1686.             results.push({
  1687.                 color: new Color(s[0]),
  1688.                 offsetX: s[1] ? parseFloat(s[1].replace('px', '')) : 0,
  1689.                 offsetY: s[2] ? parseFloat(s[2].replace('px', '')) : 0,
  1690.                 blur: s[3] ? s[3].replace('px', '') : 0
  1691.             });
  1692.         }
  1693.     }
  1694.     return results;
  1695. };
  1696.  
  1697. NodeContainer.prototype.parseTransform = function() {
  1698.     if (!this.transformData) {
  1699.         if (this.hasTransform()) {
  1700.             var offset = this.parseBounds();
  1701.             var origin = this.prefixedCss("transformOrigin").split(" ").map(removePx).map(asFloat);
  1702.             origin[0] += offset.left;
  1703.             origin[1] += offset.top;
  1704.             this.transformData = {
  1705.                 origin: origin,
  1706.                 matrix: this.parseTransformMatrix()
  1707.             };
  1708.         } else {
  1709.             this.transformData = {
  1710.                 origin: [0, 0],
  1711.                 matrix: [1, 0, 0, 1, 0, 0]
  1712.             };
  1713.         }
  1714.     }
  1715.     return this.transformData;
  1716. };
  1717.  
  1718. NodeContainer.prototype.parseTransformMatrix = function() {
  1719.     if (!this.transformMatrix) {
  1720.         var transform = this.prefixedCss("transform");
  1721.         var matrix = transform ? parseMatrix(transform.match(this.MATRIX_PROPERTY)) : null;
  1722.         this.transformMatrix = matrix ? matrix : [1, 0, 0, 1, 0, 0];
  1723.     }
  1724.     return this.transformMatrix;
  1725. };
  1726.  
  1727. NodeContainer.prototype.parseBounds = function() {
  1728.     return this.bounds || (this.bounds = this.hasTransform() ? offsetBounds(this.node) : getBounds(this.node));
  1729. };
  1730.  
  1731. NodeContainer.prototype.hasTransform = function() {
  1732.     return this.parseTransformMatrix().join(",") !== "1,0,0,1,0,0" || (this.parent && this.parent.hasTransform());
  1733. };
  1734.  
  1735. NodeContainer.prototype.getValue = function() {
  1736.     var value = this.node.value || "";
  1737.     if (this.node.tagName === "SELECT") {
  1738.         value = selectionValue(this.node);
  1739.     } else if (this.node.type === "password") {
  1740.         value = Array(value.length + 1).join('\u2022'); // jshint ignore:line
  1741.     }
  1742.     return value.length === 0 ? (this.node.placeholder || "") : value;
  1743. };
  1744.  
  1745. NodeContainer.prototype.MATRIX_PROPERTY = /(matrix)\((.+)\)/;
  1746. NodeContainer.prototype.TEXT_SHADOW_PROPERTY = /((rgba|rgb)\([^\)]+\)(\s-?\d+px){0,})/g;
  1747. NodeContainer.prototype.TEXT_SHADOW_VALUES = /(-?\d+px)|(#.+)|(rgb\(.+\))|(rgba\(.+\))/g;
  1748. NodeContainer.prototype.CLIP = /^rect\((\d+)px,? (\d+)px,? (\d+)px,? (\d+)px\)$/;
  1749.  
  1750. function selectionValue(node) {
  1751.     var option = node.options[node.selectedIndex || 0];
  1752.     return option ? (option.text || "") : "";
  1753. }
  1754.  
  1755. function parseMatrix(match) {
  1756.     if (match && match[1] === "matrix") {
  1757.         return match[2].split(",").map(function(s) {
  1758.             return parseFloat(s.trim());
  1759.         });
  1760.     }
  1761. }
  1762.  
  1763. function isPercentage(value) {
  1764.     return value.toString().indexOf("%") !== -1;
  1765. }
  1766.  
  1767. function parseBackgrounds(backgroundImage) {
  1768.     var whitespace = ' \r\n\t',
  1769.         method, definition, prefix, prefix_i, block, results = [],
  1770.         mode = 0, numParen = 0, quote, args;
  1771.     var appendResult = function() {
  1772.         if(method) {
  1773.             if (definition.substr(0, 1) === '"') {
  1774.                 definition = definition.substr(1, definition.length - 2);
  1775.             }
  1776.             if (definition) {
  1777.                 args.push(definition);
  1778.             }
  1779.             if (method.substr(0, 1) === '-' && (prefix_i = method.indexOf('-', 1 ) + 1) > 0) {
  1780.                 prefix = method.substr(0, prefix_i);
  1781.                 method = method.substr(prefix_i);
  1782.             }
  1783.             results.push({
  1784.                 prefix: prefix,
  1785.                 method: method.toLowerCase(),
  1786.                 value: block,
  1787.                 args: args,
  1788.                 image: null
  1789.             });
  1790.         }
  1791.         args = [];
  1792.         method = prefix = definition = block = '';
  1793.     };
  1794.     args = [];
  1795.     method = prefix = definition = block = '';
  1796.     backgroundImage.split("").forEach(function(c) {
  1797.         if (mode === 0 && whitespace.indexOf(c) > -1) {
  1798.             return;
  1799.         }
  1800.         switch(c) {
  1801.         case '"':
  1802.             if(!quote) {
  1803.                 quote = c;
  1804.             } else if(quote === c) {
  1805.                 quote = null;
  1806.             }
  1807.             break;
  1808.         case '(':
  1809.             if(quote) {
  1810.                 break;
  1811.             } else if(mode === 0) {
  1812.                 mode = 1;
  1813.                 block += c;
  1814.                 return;
  1815.             } else {
  1816.                 numParen++;
  1817.             }
  1818.             break;
  1819.         case ')':
  1820.             if (quote) {
  1821.                 break;
  1822.             } else if(mode === 1) {
  1823.                 if(numParen === 0) {
  1824.                     mode = 0;
  1825.                     block += c;
  1826.                     appendResult();
  1827.                     return;
  1828.                 } else {
  1829.                     numParen--;
  1830.                 }
  1831.             }
  1832.             break;
  1833.  
  1834.         case ',':
  1835.             if (quote) {
  1836.                 break;
  1837.             } else if(mode === 0) {
  1838.                 appendResult();
  1839.                 return;
  1840.             } else if (mode === 1) {
  1841.                 if (numParen === 0 && !method.match(/^url$/i)) {
  1842.                     args.push(definition);
  1843.                     definition = '';
  1844.                     block += c;
  1845.                     return;
  1846.                 }
  1847.             }
  1848.             break;
  1849.         }
  1850.  
  1851.         block += c;
  1852.         if (mode === 0) {
  1853.             method += c;
  1854.         } else {
  1855.             definition += c;
  1856.         }
  1857.     });
  1858.  
  1859.     appendResult();
  1860.     return results;
  1861. }
  1862.  
  1863. function removePx(str) {
  1864.     return str.replace("px", "");
  1865. }
  1866.  
  1867. function asFloat(str) {
  1868.     return parseFloat(str);
  1869. }
  1870.  
  1871. function getBounds(node) {
  1872.     if (node.getBoundingClientRect) {
  1873.         var clientRect = node.getBoundingClientRect();
  1874.         var width = node.offsetWidth == null ? clientRect.width : node.offsetWidth;
  1875.         return {
  1876.             top: clientRect.top,
  1877.             bottom: clientRect.bottom || (clientRect.top + clientRect.height),
  1878.             right: clientRect.left + width,
  1879.             left: clientRect.left,
  1880.             width:  width,
  1881.             height: node.offsetHeight == null ? clientRect.height : node.offsetHeight
  1882.         };
  1883.     }
  1884.     return {};
  1885. }
  1886.  
  1887. function offsetBounds(node) {
  1888.     var parent = node.offsetParent ? offsetBounds(node.offsetParent) : {top: 0, left: 0};
  1889.  
  1890.     return {
  1891.         top: node.offsetTop + parent.top,
  1892.         bottom: node.offsetTop + node.offsetHeight + parent.top,
  1893.         right: node.offsetLeft + parent.left + node.offsetWidth,
  1894.         left: node.offsetLeft + parent.left,
  1895.         width: node.offsetWidth,
  1896.         height: node.offsetHeight
  1897.     };
  1898. }
  1899.  
  1900. function NodeParser(element, renderer, support, imageLoader, options) {
  1901.     log("Starting NodeParser");
  1902.     this.renderer = renderer;
  1903.     this.options = options;
  1904.     this.range = null;
  1905.     this.support = support;
  1906.     this.renderQueue = [];
  1907.     this.stack = new StackingContext(true, 1, element.ownerDocument, null);
  1908.     var parent = new NodeContainer(element, null);
  1909.     if (options.background) {
  1910.         renderer.rectangle(0, 0, renderer.width, renderer.height, new Color(options.background));
  1911.     }
  1912.     if (element === element.ownerDocument.documentElement) {
  1913.         // http://www.w3.org/TR/css3-background/#special-backgrounds
  1914.         var canvasBackground = new NodeContainer(parent.color('backgroundColor').isTransparent() ? element.ownerDocument.body : element.ownerDocument.documentElement, null);
  1915.         renderer.rectangle(0, 0, renderer.width, renderer.height, canvasBackground.color('backgroundColor'));
  1916.     }
  1917.     parent.visibile = parent.isElementVisible();
  1918.     this.createPseudoHideStyles(element.ownerDocument);
  1919.     this.disableAnimations(element.ownerDocument);
  1920.     this.nodes = flatten([parent].concat(this.getChildren(parent)).filter(function(container) {
  1921.         return container.visible = container.isElementVisible();
  1922.     }).map(this.getPseudoElements, this));
  1923.     this.fontMetrics = new FontMetrics();
  1924.     log("Fetched nodes, total:", this.nodes.length);
  1925.     log("Calculate overflow clips");
  1926.     this.calculateOverflowClips();
  1927.     log("Start fetching images");
  1928.     this.images = imageLoader.fetch(this.nodes.filter(isElement));
  1929.     this.ready = this.images.ready.then(bind(function() {
  1930.         log("Images loaded, starting parsing");
  1931.         log("Creating stacking contexts");
  1932.         this.createStackingContexts();
  1933.         log("Sorting stacking contexts");
  1934.         this.sortStackingContexts(this.stack);
  1935.         this.parse(this.stack);
  1936.         log("Render queue created with " + this.renderQueue.length + " items");
  1937.         return new Promise(bind(function(resolve) {
  1938.             if (!options.async) {
  1939.                 this.renderQueue.forEach(this.paint, this);
  1940.                 resolve();
  1941.             } else if (typeof(options.async) === "function") {
  1942.                 options.async.call(this, this.renderQueue, resolve);
  1943.             } else if (this.renderQueue.length > 0){
  1944.                 this.renderIndex = 0;
  1945.                 this.asyncRenderer(this.renderQueue, resolve);
  1946.             } else {
  1947.                 resolve();
  1948.             }
  1949.         }, this));
  1950.     }, this));
  1951. }
  1952.  
  1953. NodeParser.prototype.calculateOverflowClips = function() {
  1954.     this.nodes.forEach(function(container) {
  1955.         if (isElement(container)) {
  1956.             if (isPseudoElement(container)) {
  1957.                 container.appendToDOM();
  1958.             }
  1959.             container.borders = this.parseBorders(container);
  1960.             var clip = (container.css('overflow') === "hidden") ? [container.borders.clip] : [];
  1961.             var cssClip = container.parseClip();
  1962.             if (cssClip && ["absolute", "fixed"].indexOf(container.css('position')) !== -1) {
  1963.                 clip.push([["rect",
  1964.                         container.bounds.left + cssClip.left,
  1965.                         container.bounds.top + cssClip.top,
  1966.                         cssClip.right - cssClip.left,
  1967.                         cssClip.bottom - cssClip.top
  1968.                 ]]);
  1969.             }
  1970.             container.clip = hasParentClip(container) ? container.parent.clip.concat(clip) : clip;
  1971.             container.backgroundClip = (container.css('overflow') !== "hidden") ? container.clip.concat([container.borders.clip]) : container.clip;
  1972.             if (isPseudoElement(container)) {
  1973.                 container.cleanDOM();
  1974.             }
  1975.         } else if (isTextNode(container)) {
  1976.             container.clip = hasParentClip(container) ? container.parent.clip : [];
  1977.         }
  1978.         if (!isPseudoElement(container)) {
  1979.             container.bounds = null;
  1980.         }
  1981.     }, this);
  1982. };
  1983.  
  1984. function hasParentClip(container) {
  1985.     return container.parent && container.parent.clip.length;
  1986. }
  1987.  
  1988. NodeParser.prototype.asyncRenderer = function(queue, resolve, asyncTimer) {
  1989.     asyncTimer = asyncTimer || Date.now();
  1990.     this.paint(queue[this.renderIndex++]);
  1991.     if (queue.length === this.renderIndex) {
  1992.         resolve();
  1993.     } else if (asyncTimer + 20 > Date.now()) {
  1994.         this.asyncRenderer(queue, resolve, asyncTimer);
  1995.     } else {
  1996.         setTimeout(bind(function() {
  1997.             this.asyncRenderer(queue, resolve);
  1998.         }, this), 0);
  1999.     }
  2000. };
  2001.  
  2002. NodeParser.prototype.createPseudoHideStyles = function(document) {
  2003.     this.createStyles(document, '.' + PseudoElementContainer.prototype.PSEUDO_HIDE_ELEMENT_CLASS_BEFORE + ':before { content: "" !important; display: none !important; }' +
  2004.         '.' + PseudoElementContainer.prototype.PSEUDO_HIDE_ELEMENT_CLASS_AFTER + ':after { content: "" !important; display: none !important; }');
  2005. };
  2006.  
  2007. NodeParser.prototype.disableAnimations = function(document) {
  2008.     this.createStyles(document, '* { -webkit-animation: none !important; -moz-animation: none !important; -o-animation: none !important; animation: none !important; ' +
  2009.         '-webkit-transition: none !important; -moz-transition: none !important; -o-transition: none !important; transition: none !important;}');
  2010. };
  2011.  
  2012. NodeParser.prototype.createStyles = function(document, styles) {
  2013.     var hidePseudoElements = document.createElement('style');
  2014.     hidePseudoElements.innerHTML = styles;
  2015.     document.body.appendChild(hidePseudoElements);
  2016. };
  2017.  
  2018. NodeParser.prototype.getPseudoElements = function(container) {
  2019.     var nodes = [[container]];
  2020.     if (container.node.nodeType === Node.ELEMENT_NODE) {
  2021.         var before = this.getPseudoElement(container, ":before");
  2022.         var after = this.getPseudoElement(container, ":after");
  2023.  
  2024.         if (before) {
  2025.             nodes.push(before);
  2026.         }
  2027.  
  2028.         if (after) {
  2029.             nodes.push(after);
  2030.         }
  2031.     }
  2032.     return flatten(nodes);
  2033. };
  2034.  
  2035. function toCamelCase(str) {
  2036.     return str.replace(/(\-[a-z])/g, function(match){
  2037.         return match.toUpperCase().replace('-','');
  2038.     });
  2039. }
  2040.  
  2041. NodeParser.prototype.getPseudoElement = function(container, type) {
  2042.     var style = container.computedStyle(type);
  2043.     if(!style || !style.content || style.content === "none" || style.content === "-moz-alt-content" || style.display === "none") {
  2044.         return null;
  2045.     }
  2046.  
  2047.     var content = stripQuotes(style.content);
  2048.     var isImage = content.substr(0, 3) === 'url';
  2049.     var pseudoNode = document.createElement(isImage ? 'img' : 'html2canvaspseudoelement');
  2050.     var pseudoContainer = new PseudoElementContainer(pseudoNode, container, type);
  2051.  
  2052.     for (var i = style.length-1; i >= 0; i--) {
  2053.         var property = toCamelCase(style.item(i));
  2054.         pseudoNode.style[property] = style[property];
  2055.     }
  2056.  
  2057.     pseudoNode.className = PseudoElementContainer.prototype.PSEUDO_HIDE_ELEMENT_CLASS_BEFORE + " " + PseudoElementContainer.prototype.PSEUDO_HIDE_ELEMENT_CLASS_AFTER;
  2058.  
  2059.     if (isImage) {
  2060.         pseudoNode.src = parseBackgrounds(content)[0].args[0];
  2061.         return [pseudoContainer];
  2062.     } else {
  2063.         var text = document.createTextNode(content);
  2064.         pseudoNode.appendChild(text);
  2065.         return [pseudoContainer, new TextContainer(text, pseudoContainer)];
  2066.     }
  2067. };
  2068.  
  2069.  
  2070. NodeParser.prototype.getChildren = function(parentContainer) {
  2071.     return flatten([].filter.call(parentContainer.node.childNodes, renderableNode).map(function(node) {
  2072.         var container = [node.nodeType === Node.TEXT_NODE ? new TextContainer(node, parentContainer) : new NodeContainer(node, parentContainer)].filter(nonIgnoredElement);
  2073.         return node.nodeType === Node.ELEMENT_NODE && container.length && node.tagName !== "TEXTAREA" ? (container[0].isElementVisible() ? container.concat(this.getChildren(container[0])) : []) : container;
  2074.     }, this));
  2075. };
  2076.  
  2077. NodeParser.prototype.newStackingContext = function(container, hasOwnStacking) {
  2078.     var stack = new StackingContext(hasOwnStacking, container.getOpacity(), container.node, container.parent);
  2079.     container.cloneTo(stack);
  2080.     var parentStack = hasOwnStacking ? stack.getParentStack(this) : stack.parent.stack;
  2081.     parentStack.contexts.push(stack);
  2082.     container.stack = stack;
  2083. };
  2084.  
  2085. NodeParser.prototype.createStackingContexts = function() {
  2086.     this.nodes.forEach(function(container) {
  2087.         if (isElement(container) && (this.isRootElement(container) || hasOpacity(container) || isPositionedForStacking(container) || this.isBodyWithTransparentRoot(container) || container.hasTransform())) {
  2088.             this.newStackingContext(container, true);
  2089.         } else if (isElement(container) && ((isPositioned(container) && zIndex0(container)) || isInlineBlock(container) || isFloating(container))) {
  2090.             this.newStackingContext(container, false);
  2091.         } else {
  2092.             container.assignStack(container.parent.stack);
  2093.         }
  2094.     }, this);
  2095. };
  2096.  
  2097. NodeParser.prototype.isBodyWithTransparentRoot = function(container) {
  2098.     return container.node.nodeName === "BODY" && container.parent.color('backgroundColor').isTransparent();
  2099. };
  2100.  
  2101. NodeParser.prototype.isRootElement = function(container) {
  2102.     return container.parent === null;
  2103. };
  2104.  
  2105. NodeParser.prototype.sortStackingContexts = function(stack) {
  2106.     stack.contexts.sort(zIndexSort(stack.contexts.slice(0)));
  2107.     stack.contexts.forEach(this.sortStackingContexts, this);
  2108. };
  2109.  
  2110. NodeParser.prototype.parseTextBounds = function(container) {
  2111.     return function(text, index, textList) {
  2112.         if (container.parent.css("textDecoration").substr(0, 4) !== "none" || text.trim().length !== 0) {
  2113.             if (this.support.rangeBounds && !container.parent.hasTransform()) {
  2114.                 var offset = textList.slice(0, index).join("").length;
  2115.                 return this.getRangeBounds(container.node, offset, text.length);
  2116.             } else if (container.node && typeof(container.node.data) === "string") {
  2117.                 var replacementNode = container.node.splitText(text.length);
  2118.                 var bounds = this.getWrapperBounds(container.node, container.parent.hasTransform());
  2119.                 container.node = replacementNode;
  2120.                 return bounds;
  2121.             }
  2122.         } else if(!this.support.rangeBounds || container.parent.hasTransform()){
  2123.             container.node = container.node.splitText(text.length);
  2124.         }
  2125.         return {};
  2126.     };
  2127. };
  2128.  
  2129. NodeParser.prototype.getWrapperBounds = function(node, transform) {
  2130.     var wrapper = node.ownerDocument.createElement('html2canvaswrapper');
  2131.     var parent = node.parentNode,
  2132.         backupText = node.cloneNode(true);
  2133.  
  2134.     wrapper.appendChild(node.cloneNode(true));
  2135.     parent.replaceChild(wrapper, node);
  2136.     var bounds = transform ? offsetBounds(wrapper) : getBounds(wrapper);
  2137.     parent.replaceChild(backupText, wrapper);
  2138.     return bounds;
  2139. };
  2140.  
  2141. NodeParser.prototype.getRangeBounds = function(node, offset, length) {
  2142.     var range = this.range || (this.range = node.ownerDocument.createRange());
  2143.     range.setStart(node, offset);
  2144.     range.setEnd(node, offset + length);
  2145.     return range.getBoundingClientRect();
  2146. };
  2147.  
  2148. function ClearTransform() {}
  2149.  
  2150. NodeParser.prototype.parse = function(stack) {
  2151.     // http://www.w3.org/TR/CSS21/visuren.html#z-index
  2152.     var negativeZindex = stack.contexts.filter(negativeZIndex); // 2. the child stacking contexts with negative stack levels (most negative first).
  2153.     var descendantElements = stack.children.filter(isElement);
  2154.     var descendantNonFloats = descendantElements.filter(not(isFloating));
  2155.     var nonInlineNonPositionedDescendants = descendantNonFloats.filter(not(isPositioned)).filter(not(inlineLevel)); // 3 the in-flow, non-inline-level, non-positioned descendants.
  2156.     var nonPositionedFloats = descendantElements.filter(not(isPositioned)).filter(isFloating); // 4. the non-positioned floats.
  2157.     var inFlow = descendantNonFloats.filter(not(isPositioned)).filter(inlineLevel); // 5. the in-flow, inline-level, non-positioned descendants, including inline tables and inline blocks.
  2158.     var stackLevel0 = stack.contexts.concat(descendantNonFloats.filter(isPositioned)).filter(zIndex0); // 6. the child stacking contexts with stack level 0 and the positioned descendants with stack level 0.
  2159.     var text = stack.children.filter(isTextNode).filter(hasText);
  2160.     var positiveZindex = stack.contexts.filter(positiveZIndex); // 7. the child stacking contexts with positive stack levels (least positive first).
  2161.     negativeZindex.concat(nonInlineNonPositionedDescendants).concat(nonPositionedFloats)
  2162.         .concat(inFlow).concat(stackLevel0).concat(text).concat(positiveZindex).forEach(function(container) {
  2163.             this.renderQueue.push(container);
  2164.             if (isStackingContext(container)) {
  2165.                 this.parse(container);
  2166.                 this.renderQueue.push(new ClearTransform());
  2167.             }
  2168.         }, this);
  2169. };
  2170.  
  2171. NodeParser.prototype.paint = function(container) {
  2172.     try {
  2173.         if (container instanceof ClearTransform) {
  2174.             this.renderer.ctx.restore();
  2175.         } else if (isTextNode(container)) {
  2176.             if (isPseudoElement(container.parent)) {
  2177.                 container.parent.appendToDOM();
  2178.             }
  2179.             this.paintText(container);
  2180.             if (isPseudoElement(container.parent)) {
  2181.                 container.parent.cleanDOM();
  2182.             }
  2183.         } else {
  2184.             this.paintNode(container);
  2185.         }
  2186.     } catch(e) {
  2187.         log(e);
  2188.         if (this.options.strict) {
  2189.             throw e;
  2190.         }
  2191.     }
  2192. };
  2193.  
  2194. NodeParser.prototype.paintNode = function(container) {
  2195.     if (isStackingContext(container)) {
  2196.         this.renderer.setOpacity(container.opacity);
  2197.         this.renderer.ctx.save();
  2198.         if (container.hasTransform()) {
  2199.             this.renderer.setTransform(container.parseTransform());
  2200.         }
  2201.     }
  2202.  
  2203.     if (container.node.nodeName === "INPUT" && container.node.type === "checkbox") {
  2204.         this.paintCheckbox(container);
  2205.     } else if (container.node.nodeName === "INPUT" && container.node.type === "radio") {
  2206.         this.paintRadio(container);
  2207.     } else {
  2208.         this.paintElement(container);
  2209.     }
  2210. };
  2211.  
  2212. NodeParser.prototype.paintElement = function(container) {
  2213.     var bounds = container.parseBounds();
  2214.     this.renderer.clip(container.backgroundClip, function() {
  2215.         this.renderer.renderBackground(container, bounds, container.borders.borders.map(getWidth));
  2216.     }, this);
  2217.  
  2218.     this.renderer.clip(container.clip, function() {
  2219.         this.renderer.renderBorders(container.borders.borders);
  2220.     }, this);
  2221.  
  2222.     this.renderer.clip(container.backgroundClip, function() {
  2223.         switch (container.node.nodeName) {
  2224.         case "svg":
  2225.         case "IFRAME":
  2226.             var imgContainer = this.images.get(container.node);
  2227.             if (imgContainer) {
  2228.                 this.renderer.renderImage(container, bounds, container.borders, imgContainer);
  2229.             } else {
  2230.                 log("Error loading <" + container.node.nodeName + ">", container.node);
  2231.             }
  2232.             break;
  2233.         case "IMG":
  2234.             var imageContainer = this.images.get(container.node.src);
  2235.             if (imageContainer) {
  2236.                 this.renderer.renderImage(container, bounds, container.borders, imageContainer);
  2237.             } else {
  2238.                 log("Error loading <img>", container.node.src);
  2239.             }
  2240.             break;
  2241.         case "CANVAS":
  2242.             this.renderer.renderImage(container, bounds, container.borders, {image: container.node});
  2243.             break;
  2244.         case "SELECT":
  2245.         case "INPUT":
  2246.         case "TEXTAREA":
  2247.             this.paintFormValue(container);
  2248.             break;
  2249.         }
  2250.     }, this);
  2251. };
  2252.  
  2253. NodeParser.prototype.paintCheckbox = function(container) {
  2254.     var b = container.parseBounds();
  2255.  
  2256.     var size = Math.min(b.width, b.height);
  2257.     var bounds = {width: size - 1, height: size - 1, top: b.top, left: b.left};
  2258.     var r = [3, 3];
  2259.     var radius = [r, r, r, r];
  2260.     var borders = [1,1,1,1].map(function(w) {
  2261.         return {color: new Color('#A5A5A5'), width: w};
  2262.     });
  2263.  
  2264.     var borderPoints = calculateCurvePoints(bounds, radius, borders);
  2265.  
  2266.     this.renderer.clip(container.backgroundClip, function() {
  2267.         this.renderer.rectangle(bounds.left + 1, bounds.top + 1, bounds.width - 2, bounds.height - 2, new Color("#DEDEDE"));
  2268.         this.renderer.renderBorders(calculateBorders(borders, bounds, borderPoints, radius));
  2269.         if (container.node.checked) {
  2270.             this.renderer.font(new Color('#424242'), 'normal', 'normal', 'bold', (size - 3) + "px", 'arial');
  2271.             this.renderer.text("\u2714", bounds.left + size / 6, bounds.top + size - 1);
  2272.         }
  2273.     }, this);
  2274. };
  2275.  
  2276. NodeParser.prototype.paintRadio = function(container) {
  2277.     var bounds = container.parseBounds();
  2278.  
  2279.     var size = Math.min(bounds.width, bounds.height) - 2;
  2280.  
  2281.     this.renderer.clip(container.backgroundClip, function() {
  2282.         this.renderer.circleStroke(bounds.left + 1, bounds.top + 1, size, new Color('#DEDEDE'), 1, new Color('#A5A5A5'));
  2283.         if (container.node.checked) {
  2284.             this.renderer.circle(Math.ceil(bounds.left + size / 4) + 1, Math.ceil(bounds.top + size / 4) + 1, Math.floor(size / 2), new Color('#424242'));
  2285.         }
  2286.     }, this);
  2287. };
  2288.  
  2289. NodeParser.prototype.paintFormValue = function(container) {
  2290.     var value = container.getValue();
  2291.     if (value.length > 0) {
  2292.         var document = container.node.ownerDocument;
  2293.         var wrapper = document.createElement('html2canvaswrapper');
  2294.         var properties = ['lineHeight', 'textAlign', 'fontFamily', 'fontWeight', 'fontSize', 'color',
  2295.             'paddingLeft', 'paddingTop', 'paddingRight', 'paddingBottom',
  2296.             'width', 'height', 'borderLeftStyle', 'borderTopStyle', 'borderLeftWidth', 'borderTopWidth',
  2297.             'boxSizing', 'whiteSpace', 'wordWrap'];
  2298.  
  2299.         properties.forEach(function(property) {
  2300.             try {
  2301.                 wrapper.style[property] = container.css(property);
  2302.             } catch(e) {
  2303.                 // Older IE has issues with "border"
  2304.                 log("html2canvas: Parse: Exception caught in renderFormValue: " + e.message);
  2305.             }
  2306.         });
  2307.         var bounds = container.parseBounds();
  2308.         wrapper.style.position = "fixed";
  2309.         wrapper.style.left = bounds.left + "px";
  2310.         wrapper.style.top = bounds.top + "px";
  2311.         wrapper.textContent = value;
  2312.         document.body.appendChild(wrapper);
  2313.         this.paintText(new TextContainer(wrapper.firstChild, container));
  2314.         document.body.removeChild(wrapper);
  2315.     }
  2316. };
  2317.  
  2318. NodeParser.prototype.paintText = function(container) {
  2319.     container.applyTextTransform();
  2320.     var characters = window.html2canvas.punycode.ucs2.decode(container.node.data);
  2321.     var textList = (!this.options.letterRendering || noLetterSpacing(container)) && !hasUnicode(container.node.data) ? getWords(characters) : characters.map(function(character) {
  2322.         return window.html2canvas.punycode.ucs2.encode([character]);
  2323.     });
  2324.  
  2325.     var weight = container.parent.fontWeight();
  2326.     var size = container.parent.css('fontSize');
  2327.     var family = container.parent.css('fontFamily');
  2328.     var shadows = container.parent.parseTextShadows();
  2329.  
  2330.     this.renderer.font(container.parent.color('color'), container.parent.css('fontStyle'), container.parent.css('fontVariant'), weight, size, family);
  2331.     if (shadows.length) {
  2332.         // TODO: support multiple text shadows
  2333.         this.renderer.fontShadow(shadows[0].color, shadows[0].offsetX, shadows[0].offsetY, shadows[0].blur);
  2334.     } else {
  2335.         this.renderer.clearShadow();
  2336.     }
  2337.  
  2338.     this.renderer.clip(container.parent.clip, function() {
  2339.         textList.map(this.parseTextBounds(container), this).forEach(function(bounds, index) {
  2340.             if (bounds) {
  2341.                 this.renderer.text(textList[index], bounds.left, bounds.bottom);
  2342.                 this.renderTextDecoration(container.parent, bounds, this.fontMetrics.getMetrics(family, size));
  2343.             }
  2344.         }, this);
  2345.     }, this);
  2346. };
  2347.  
  2348. NodeParser.prototype.renderTextDecoration = function(container, bounds, metrics) {
  2349.     switch(container.css("textDecoration").split(" ")[0]) {
  2350.     case "underline":
  2351.         // Draws a line at the baseline of the font
  2352.         // 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
  2353.         this.renderer.rectangle(bounds.left, Math.round(bounds.top + metrics.baseline + metrics.lineWidth), bounds.width, 1, container.color("color"));
  2354.         break;
  2355.     case "overline":
  2356.         this.renderer.rectangle(bounds.left, Math.round(bounds.top), bounds.width, 1, container.color("color"));
  2357.         break;
  2358.     case "line-through":
  2359.         // TODO try and find exact position for line-through
  2360.         this.renderer.rectangle(bounds.left, Math.ceil(bounds.top + metrics.middle + metrics.lineWidth), bounds.width, 1, container.color("color"));
  2361.         break;
  2362.     }
  2363. };
  2364.  
  2365. var borderColorTransforms = {
  2366.     inset: [
  2367.         ["darken", 0.60],
  2368.         ["darken", 0.10],
  2369.         ["darken", 0.10],
  2370.         ["darken", 0.60]
  2371.     ]
  2372. };
  2373.  
  2374. NodeParser.prototype.parseBorders = function(container) {
  2375.     var nodeBounds = container.parseBounds();
  2376.     var radius = getBorderRadiusData(container);
  2377.     var borders = ["Top", "Right", "Bottom", "Left"].map(function(side, index) {
  2378.         var style = container.css('border' + side + 'Style');
  2379.         var color = container.color('border' + side + 'Color');
  2380.         if (style === "inset" && color.isBlack()) {
  2381.             color = new Color([255, 255, 255, color.a]); // this is wrong, but
  2382.         }
  2383.         var colorTransform = borderColorTransforms[style] ? borderColorTransforms[style][index] : null;
  2384.         return {
  2385.             width: container.cssInt('border' + side + 'Width'),
  2386.             color: colorTransform ? color[colorTransform[0]](colorTransform[1]) : color,
  2387.             args: null
  2388.         };
  2389.     });
  2390.     var borderPoints = calculateCurvePoints(nodeBounds, radius, borders);
  2391.  
  2392.     return {
  2393.         clip: this.parseBackgroundClip(container, borderPoints, borders, radius, nodeBounds),
  2394.         borders: calculateBorders(borders, nodeBounds, borderPoints, radius)
  2395.     };
  2396. };
  2397.  
  2398. function calculateBorders(borders, nodeBounds, borderPoints, radius) {
  2399.     return borders.map(function(border, borderSide) {
  2400.         if (border.width > 0) {
  2401.             var bx = nodeBounds.left;
  2402.             var by = nodeBounds.top;
  2403.             var bw = nodeBounds.width;
  2404.             var bh = nodeBounds.height - (borders[2].width);
  2405.  
  2406.             switch(borderSide) {
  2407.             case 0:
  2408.                 // top border
  2409.                 bh = borders[0].width;
  2410.                 border.args = drawSide({
  2411.                         c1: [bx, by],
  2412.                         c2: [bx + bw, by],
  2413.                         c3: [bx + bw - borders[1].width, by + bh],
  2414.                         c4: [bx + borders[3].width, by + bh]
  2415.                     }, radius[0], radius[1],
  2416.                     borderPoints.topLeftOuter, borderPoints.topLeftInner, borderPoints.topRightOuter, borderPoints.topRightInner);
  2417.                 break;
  2418.             case 1:
  2419.                 // right border
  2420.                 bx = nodeBounds.left + nodeBounds.width - (borders[1].width);
  2421.                 bw = borders[1].width;
  2422.  
  2423.                 border.args = drawSide({
  2424.                         c1: [bx + bw, by],
  2425.                         c2: [bx + bw, by + bh + borders[2].width],
  2426.                         c3: [bx, by + bh],
  2427.                         c4: [bx, by + borders[0].width]
  2428.                     }, radius[1], radius[2],
  2429.                     borderPoints.topRightOuter, borderPoints.topRightInner, borderPoints.bottomRightOuter, borderPoints.bottomRightInner);
  2430.                 break;
  2431.             case 2:
  2432.                 // bottom border
  2433.                 by = (by + nodeBounds.height) - (borders[2].width);
  2434.                 bh = borders[2].width;
  2435.                 border.args = drawSide({
  2436.                         c1: [bx + bw, by + bh],
  2437.                         c2: [bx, by + bh],
  2438.                         c3: [bx + borders[3].width, by],
  2439.                         c4: [bx + bw - borders[3].width, by]
  2440.                     }, radius[2], radius[3],
  2441.                     borderPoints.bottomRightOuter, borderPoints.bottomRightInner, borderPoints.bottomLeftOuter, borderPoints.bottomLeftInner);
  2442.                 break;
  2443.             case 3:
  2444.                 // left border
  2445.                 bw = borders[3].width;
  2446.                 border.args = drawSide({
  2447.                         c1: [bx, by + bh + borders[2].width],
  2448.                         c2: [bx, by],
  2449.                         c3: [bx + bw, by + borders[0].width],
  2450.                         c4: [bx + bw, by + bh]
  2451.                     }, radius[3], radius[0],
  2452.                     borderPoints.bottomLeftOuter, borderPoints.bottomLeftInner, borderPoints.topLeftOuter, borderPoints.topLeftInner);
  2453.                 break;
  2454.             }
  2455.         }
  2456.         return border;
  2457.     });
  2458. }
  2459.  
  2460. NodeParser.prototype.parseBackgroundClip = function(container, borderPoints, borders, radius, bounds) {
  2461.     var backgroundClip = container.css('backgroundClip'),
  2462.         borderArgs = [];
  2463.  
  2464.     switch(backgroundClip) {
  2465.     case "content-box":
  2466.     case "padding-box":
  2467.         parseCorner(borderArgs, radius[0], radius[1], borderPoints.topLeftInner, borderPoints.topRightInner, bounds.left + borders[3].width, bounds.top + borders[0].width);
  2468.         parseCorner(borderArgs, radius[1], radius[2], borderPoints.topRightInner, borderPoints.bottomRightInner, bounds.left + bounds.width - borders[1].width, bounds.top + borders[0].width);
  2469.         parseCorner(borderArgs, radius[2], radius[3], borderPoints.bottomRightInner, borderPoints.bottomLeftInner, bounds.left + bounds.width - borders[1].width, bounds.top + bounds.height - borders[2].width);
  2470.         parseCorner(borderArgs, radius[3], radius[0], borderPoints.bottomLeftInner, borderPoints.topLeftInner, bounds.left + borders[3].width, bounds.top + bounds.height - borders[2].width);
  2471.         break;
  2472.  
  2473.     default:
  2474.         parseCorner(borderArgs, radius[0], radius[1], borderPoints.topLeftOuter, borderPoints.topRightOuter, bounds.left, bounds.top);
  2475.         parseCorner(borderArgs, radius[1], radius[2], borderPoints.topRightOuter, borderPoints.bottomRightOuter, bounds.left + bounds.width, bounds.top);
  2476.         parseCorner(borderArgs, radius[2], radius[3], borderPoints.bottomRightOuter, borderPoints.bottomLeftOuter, bounds.left + bounds.width, bounds.top + bounds.height);
  2477.         parseCorner(borderArgs, radius[3], radius[0], borderPoints.bottomLeftOuter, borderPoints.topLeftOuter, bounds.left, bounds.top + bounds.height);
  2478.         break;
  2479.     }
  2480.  
  2481.     return borderArgs;
  2482. };
  2483.  
  2484. function getCurvePoints(x, y, r1, r2) {
  2485.     var kappa = 4 * ((Math.sqrt(2) - 1) / 3);
  2486.     var ox = (r1) * kappa, // control point offset horizontal
  2487.         oy = (r2) * kappa, // control point offset vertical
  2488.         xm = x + r1, // x-middle
  2489.         ym = y + r2; // y-middle
  2490.     return {
  2491.         topLeft: bezierCurve({x: x, y: ym}, {x: x, y: ym - oy}, {x: xm - ox, y: y}, {x: xm, y: y}),
  2492.         topRight: bezierCurve({x: x, y: y}, {x: x + ox,y: y}, {x: xm, y: ym - oy}, {x: xm, y: ym}),
  2493.         bottomRight: bezierCurve({x: xm, y: y}, {x: xm, y: y + oy}, {x: x + ox, y: ym}, {x: x, y: ym}),
  2494.         bottomLeft: bezierCurve({x: xm, y: ym}, {x: xm - ox, y: ym}, {x: x, y: y + oy}, {x: x, y:y})
  2495.     };
  2496. }
  2497.  
  2498. function calculateCurvePoints(bounds, borderRadius, borders) {
  2499.     var x = bounds.left,
  2500.         y = bounds.top,
  2501.         width = bounds.width,
  2502.         height = bounds.height,
  2503.  
  2504.         tlh = borderRadius[0][0],
  2505.         tlv = borderRadius[0][1],
  2506.         trh = borderRadius[1][0],
  2507.         trv = borderRadius[1][1],
  2508.         brh = borderRadius[2][0],
  2509.         brv = borderRadius[2][1],
  2510.         blh = borderRadius[3][0],
  2511.         blv = borderRadius[3][1];
  2512.  
  2513.     var topWidth = width - trh,
  2514.         rightHeight = height - brv,
  2515.         bottomWidth = width - brh,
  2516.         leftHeight = height - blv;
  2517.  
  2518.     return {
  2519.         topLeftOuter: getCurvePoints(x, y, tlh, tlv).topLeft.subdivide(0.5),
  2520.         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),
  2521.         topRightOuter: getCurvePoints(x + topWidth, y, trh, trv).topRight.subdivide(0.5),
  2522.         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),
  2523.         bottomRightOuter: getCurvePoints(x + bottomWidth, y + rightHeight, brh, brv).bottomRight.subdivide(0.5),
  2524.         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),  brv - borders[2].width).bottomRight.subdivide(0.5),
  2525.         bottomLeftOuter: getCurvePoints(x, y + leftHeight, blh, blv).bottomLeft.subdivide(0.5),
  2526.         bottomLeftInner: getCurvePoints(x + borders[3].width, y + leftHeight, Math.max(0, blh - borders[3].width), blv - borders[2].width).bottomLeft.subdivide(0.5)
  2527.     };
  2528. }
  2529.  
  2530. function bezierCurve(start, startControl, endControl, end) {
  2531.     var lerp = function (a, b, t) {
  2532.         return {
  2533.             x: a.x + (b.x - a.x) * t,
  2534.             y: a.y + (b.y - a.y) * t
  2535.         };
  2536.     };
  2537.  
  2538.     return {
  2539.         start: start,
  2540.         startControl: startControl,
  2541.         endControl: endControl,
  2542.         end: end,
  2543.         subdivide: function(t) {
  2544.             var ab = lerp(start, startControl, t),
  2545.                 bc = lerp(startControl, endControl, t),
  2546.                 cd = lerp(endControl, end, t),
  2547.                 abbc = lerp(ab, bc, t),
  2548.                 bccd = lerp(bc, cd, t),
  2549.                 dest = lerp(abbc, bccd, t);
  2550.             return [bezierCurve(start, ab, abbc, dest), bezierCurve(dest, bccd, cd, end)];
  2551.         },
  2552.         curveTo: function(borderArgs) {
  2553.             borderArgs.push(["bezierCurve", startControl.x, startControl.y, endControl.x, endControl.y, end.x, end.y]);
  2554.         },
  2555.         curveToReversed: function(borderArgs) {
  2556.             borderArgs.push(["bezierCurve", endControl.x, endControl.y, startControl.x, startControl.y, start.x, start.y]);
  2557.         }
  2558.     };
  2559. }
  2560.  
  2561. function drawSide(borderData, radius1, radius2, outer1, inner1, outer2, inner2) {
  2562.     var borderArgs = [];
  2563.  
  2564.     if (radius1[0] > 0 || radius1[1] > 0) {
  2565.         borderArgs.push(["line", outer1[1].start.x, outer1[1].start.y]);
  2566.         outer1[1].curveTo(borderArgs);
  2567.     } else {
  2568.         borderArgs.push([ "line", borderData.c1[0], borderData.c1[1]]);
  2569.     }
  2570.  
  2571.     if (radius2[0] > 0 || radius2[1] > 0) {
  2572.         borderArgs.push(["line", outer2[0].start.x, outer2[0].start.y]);
  2573.         outer2[0].curveTo(borderArgs);
  2574.         borderArgs.push(["line", inner2[0].end.x, inner2[0].end.y]);
  2575.         inner2[0].curveToReversed(borderArgs);
  2576.     } else {
  2577.         borderArgs.push(["line", borderData.c2[0], borderData.c2[1]]);
  2578.         borderArgs.push(["line", borderData.c3[0], borderData.c3[1]]);
  2579.     }
  2580.  
  2581.     if (radius1[0] > 0 || radius1[1] > 0) {
  2582.         borderArgs.push(["line", inner1[1].end.x, inner1[1].end.y]);
  2583.         inner1[1].curveToReversed(borderArgs);
  2584.     } else {
  2585.         borderArgs.push(["line", borderData.c4[0], borderData.c4[1]]);
  2586.     }
  2587.  
  2588.     return borderArgs;
  2589. }
  2590.  
  2591. function parseCorner(borderArgs, radius1, radius2, corner1, corner2, x, y) {
  2592.     if (radius1[0] > 0 || radius1[1] > 0) {
  2593.         borderArgs.push(["line", corner1[0].start.x, corner1[0].start.y]);
  2594.         corner1[0].curveTo(borderArgs);
  2595.         corner1[1].curveTo(borderArgs);
  2596.     } else {
  2597.         borderArgs.push(["line", x, y]);
  2598.     }
  2599.  
  2600.     if (radius2[0] > 0 || radius2[1] > 0) {
  2601.         borderArgs.push(["line", corner2[0].start.x, corner2[0].start.y]);
  2602.     }
  2603. }
  2604.  
  2605. function negativeZIndex(container) {
  2606.     return container.cssInt("zIndex") < 0;
  2607. }
  2608.  
  2609. function positiveZIndex(container) {
  2610.     return container.cssInt("zIndex") > 0;
  2611. }
  2612.  
  2613. function zIndex0(container) {
  2614.     return container.cssInt("zIndex") === 0;
  2615. }
  2616.  
  2617. function inlineLevel(container) {
  2618.     return ["inline", "inline-block", "inline-table"].indexOf(container.css("display")) !== -1;
  2619. }
  2620.  
  2621. function isStackingContext(container) {
  2622.     return (container instanceof StackingContext);
  2623. }
  2624.  
  2625. function hasText(container) {
  2626.     return container.node.data.trim().length > 0;
  2627. }
  2628.  
  2629. function noLetterSpacing(container) {
  2630.     return (/^(normal|none|0px)$/.test(container.parent.css("letterSpacing")));
  2631. }
  2632.  
  2633. function getBorderRadiusData(container) {
  2634.     return ["TopLeft", "TopRight", "BottomRight", "BottomLeft"].map(function(side) {
  2635.         var value = container.css('border' + side + 'Radius');
  2636.         var arr = value.split(" ");
  2637.         if (arr.length <= 1) {
  2638.             arr[1] = arr[0];
  2639.         }
  2640.         return arr.map(asInt);
  2641.     });
  2642. }
  2643.  
  2644. function renderableNode(node) {
  2645.     return (node.nodeType === Node.TEXT_NODE || node.nodeType === Node.ELEMENT_NODE);
  2646. }
  2647.  
  2648. function isPositionedForStacking(container) {
  2649.     var position = container.css("position");
  2650.     var zIndex = (["absolute", "relative", "fixed"].indexOf(position) !== -1) ? container.css("zIndex") : "auto";
  2651.     return zIndex !== "auto";
  2652. }
  2653.  
  2654. function isPositioned(container) {
  2655.     return container.css("position") !== "static";
  2656. }
  2657.  
  2658. function isFloating(container) {
  2659.     return container.css("float") !== "none";
  2660. }
  2661.  
  2662. function isInlineBlock(container) {
  2663.     return ["inline-block", "inline-table"].indexOf(container.css("display")) !== -1;
  2664. }
  2665.  
  2666. function not(callback) {
  2667.     var context = this;
  2668.     return function() {
  2669.         return !callback.apply(context, arguments);
  2670.     };
  2671. }
  2672.  
  2673. function isElement(container) {
  2674.     return container.node.nodeType === Node.ELEMENT_NODE;
  2675. }
  2676.  
  2677. function isPseudoElement(container) {
  2678.     return container.isPseudoElement === true;
  2679. }
  2680.  
  2681. function isTextNode(container) {
  2682.     return container.node.nodeType === Node.TEXT_NODE;
  2683. }
  2684.  
  2685. function zIndexSort(contexts) {
  2686.     return function(a, b) {
  2687.         return (a.cssInt("zIndex") + (contexts.indexOf(a) / contexts.length)) - (b.cssInt("zIndex") + (contexts.indexOf(b) / contexts.length));
  2688.     };
  2689. }
  2690.  
  2691. function hasOpacity(container) {
  2692.     return container.getOpacity() < 1;
  2693. }
  2694.  
  2695. function bind(callback, context) {
  2696.     return function() {
  2697.         return callback.apply(context, arguments);
  2698.     };
  2699. }
  2700.  
  2701. function asInt(value) {
  2702.     return parseInt(value, 10);
  2703. }
  2704.  
  2705. function getWidth(border) {
  2706.     return border.width;
  2707. }
  2708.  
  2709. function nonIgnoredElement(nodeContainer) {
  2710.     return (nodeContainer.node.nodeType !== Node.ELEMENT_NODE || ["SCRIPT", "HEAD", "TITLE", "OBJECT", "BR", "OPTION"].indexOf(nodeContainer.node.nodeName) === -1);
  2711. }
  2712.  
  2713. function flatten(arrays) {
  2714.     return [].concat.apply([], arrays);
  2715. }
  2716.  
  2717. function stripQuotes(content) {
  2718.     var first = content.substr(0, 1);
  2719.     return (first === content.substr(content.length - 1) && first.match(/'|"/)) ? content.substr(1, content.length - 2) : content;
  2720. }
  2721.  
  2722. function getWords(characters) {
  2723.     var words = [], i = 0, onWordBoundary = false, word;
  2724.     while(characters.length) {
  2725.         if (isWordBoundary(characters[i]) === onWordBoundary) {
  2726.             word = characters.splice(0, i);
  2727.             if (word.length) {
  2728.                 words.push(window.html2canvas.punycode.ucs2.encode(word));
  2729.             }
  2730.             onWordBoundary =! onWordBoundary;
  2731.             i = 0;
  2732.         } else {
  2733.             i++;
  2734.         }
  2735.  
  2736.         if (i >= characters.length) {
  2737.             word = characters.splice(0, i);
  2738.             if (word.length) {
  2739.                 words.push(window.html2canvas.punycode.ucs2.encode(word));
  2740.             }
  2741.         }
  2742.     }
  2743.     return words;
  2744. }
  2745.  
  2746. function isWordBoundary(characterCode) {
  2747.     return [
  2748.         32, // <space>
  2749.         13, // \r
  2750.         10, // \n
  2751.         9, // \t
  2752.         45 // -
  2753.     ].indexOf(characterCode) !== -1;
  2754. }
  2755.  
  2756. function hasUnicode(string) {
  2757.     return (/[^\u0000-\u00ff]/).test(string);
  2758. }
  2759.  
  2760. function Proxy(src, proxyUrl, document) {
  2761.     if (!proxyUrl) {
  2762.         return Promise.reject("No proxy configured");
  2763.     }
  2764.     var callback = createCallback(supportsCORS);
  2765.     var url = createProxyUrl(proxyUrl, src, callback);
  2766.  
  2767.     return supportsCORS ? XHR(url) : (jsonp(document, url, callback).then(function(response) {
  2768.         return decode64(response.content);
  2769.     }));
  2770. }
  2771. var proxyCount = 0;
  2772.  
  2773. var supportsCORS = ('withCredentials' in new XMLHttpRequest());
  2774. var supportsCORSImage = ('crossOrigin' in new Image());
  2775.  
  2776. function ProxyURL(src, proxyUrl, document) {
  2777.     var callback = createCallback(supportsCORSImage);
  2778.     var url = createProxyUrl(proxyUrl, src, callback);
  2779.     return (supportsCORSImage ? Promise.resolve(url) : jsonp(document, url, callback).then(function(response) {
  2780.         return "data:" + response.type + ";base64," + response.content;
  2781.     }));
  2782. }
  2783.  
  2784. function jsonp(document, url, callback) {
  2785.     return new Promise(function(resolve, reject) {
  2786.         var s = document.createElement("script");
  2787.         var cleanup = function() {
  2788.             delete window.html2canvas.proxy[callback];
  2789.             document.body.removeChild(s);
  2790.         };
  2791.         window.html2canvas.proxy[callback] = function(response) {
  2792.             cleanup();
  2793.             resolve(response);
  2794.         };
  2795.         s.src = url;
  2796.         s.onerror = function(e) {
  2797.             cleanup();
  2798.             reject(e);
  2799.         };
  2800.         document.body.appendChild(s);
  2801.     });
  2802. }
  2803.  
  2804. function createCallback(useCORS) {
  2805.     return !useCORS ? "html2canvas_" + Date.now() + "_" + (++proxyCount) + "_" + Math.round(Math.random() * 100000) : "";
  2806. }
  2807.  
  2808. function createProxyUrl(proxyUrl, src, callback) {
  2809.     return proxyUrl + "?url=" + encodeURIComponent(src) + (callback.length ? "&callback=html2canvas.proxy." + callback : "");
  2810. }
  2811.  
  2812. function ProxyImageContainer(src, proxy) {
  2813.     var script = document.createElement("script");
  2814.     var link = document.createElement("a");
  2815.     link.href = src;
  2816.     src = link.href;
  2817.     this.src = src;
  2818.     this.image = new Image();
  2819.     var self = this;
  2820.     this.promise = new Promise(function(resolve, reject) {
  2821.         self.image.crossOrigin = "Anonymous";
  2822.         self.image.onload = resolve;
  2823.         self.image.onerror = reject;
  2824.  
  2825.         new ProxyURL(src, proxy, document).then(function(url) {
  2826.             self.image.src = url;
  2827.         })['catch'](reject);
  2828.     });
  2829. }
  2830.  
  2831. function PseudoElementContainer(node, parent, type) {
  2832.     NodeContainer.call(this, node, parent);
  2833.     this.isPseudoElement = true;
  2834.     this.before = type === ":before";
  2835. }
  2836.  
  2837. PseudoElementContainer.prototype.cloneTo = function(stack) {
  2838.     PseudoElementContainer.prototype.cloneTo.call(this, stack);
  2839.     stack.isPseudoElement = true;
  2840.     stack.before = this.before;
  2841. };
  2842.  
  2843. PseudoElementContainer.prototype = Object.create(NodeContainer.prototype);
  2844.  
  2845. PseudoElementContainer.prototype.appendToDOM = function() {
  2846.     if (this.before) {
  2847.         this.parent.node.insertBefore(this.node, this.parent.node.firstChild);
  2848.     } else {
  2849.         this.parent.node.appendChild(this.node);
  2850.     }
  2851.     this.parent.node.className += " " + this.getHideClass();
  2852. };
  2853.  
  2854. PseudoElementContainer.prototype.cleanDOM = function() {
  2855.     this.node.parentNode.removeChild(this.node);
  2856.     this.parent.node.className = this.parent.node.className.replace(this.getHideClass(), "");
  2857. };
  2858.  
  2859. PseudoElementContainer.prototype.getHideClass = function() {
  2860.     return this["PSEUDO_HIDE_ELEMENT_CLASS_" + (this.before ? "BEFORE" : "AFTER")];
  2861. };
  2862.  
  2863. PseudoElementContainer.prototype.PSEUDO_HIDE_ELEMENT_CLASS_BEFORE = "___html2canvas___pseudoelement_before";
  2864. PseudoElementContainer.prototype.PSEUDO_HIDE_ELEMENT_CLASS_AFTER = "___html2canvas___pseudoelement_after";
  2865.  
  2866. function Renderer(width, height, images, options, document) {
  2867.     this.width = width;
  2868.     this.height = height;
  2869.     this.images = images;
  2870.     this.options = options;
  2871.     this.document = document;
  2872. }
  2873.  
  2874. Renderer.prototype.renderImage = function(container, bounds, borderData, imageContainer) {
  2875.     var paddingLeft = container.cssInt('paddingLeft'),
  2876.         paddingTop = container.cssInt('paddingTop'),
  2877.         paddingRight = container.cssInt('paddingRight'),
  2878.         paddingBottom = container.cssInt('paddingBottom'),
  2879.         borders = borderData.borders;
  2880.  
  2881.     var width = bounds.width - (borders[1].width + borders[3].width + paddingLeft + paddingRight);
  2882.     var height = bounds.height - (borders[0].width + borders[2].width + paddingTop + paddingBottom);
  2883.     this.drawImage(
  2884.         imageContainer,
  2885.         0,
  2886.         0,
  2887.         imageContainer.image.width || width,
  2888.         imageContainer.image.height || height,
  2889.         bounds.left + paddingLeft + borders[3].width,
  2890.         bounds.top + paddingTop + borders[0].width,
  2891.         width,
  2892.         height
  2893.     );
  2894. };
  2895.  
  2896. Renderer.prototype.renderBackground = function(container, bounds, borderData) {
  2897.     if (bounds.height > 0 && bounds.width > 0) {
  2898.         this.renderBackgroundColor(container, bounds);
  2899.         this.renderBackgroundImage(container, bounds, borderData);
  2900.     }
  2901. };
  2902.  
  2903. Renderer.prototype.renderBackgroundColor = function(container, bounds) {
  2904.     var color = container.color("backgroundColor");
  2905.     if (!color.isTransparent()) {
  2906.         this.rectangle(bounds.left, bounds.top, bounds.width, bounds.height, color);
  2907.     }
  2908. };
  2909.  
  2910. Renderer.prototype.renderBorders = function(borders) {
  2911.     borders.forEach(this.renderBorder, this);
  2912. };
  2913.  
  2914. Renderer.prototype.renderBorder = function(data) {
  2915.     if (!data.color.isTransparent() && data.args !== null) {
  2916.         this.drawShape(data.args, data.color);
  2917.     }
  2918. };
  2919.  
  2920. Renderer.prototype.renderBackgroundImage = function(container, bounds, borderData) {
  2921.     var backgroundImages = container.parseBackgroundImages();
  2922.     backgroundImages.reverse().forEach(function(backgroundImage, index, arr) {
  2923.         switch(backgroundImage.method) {
  2924.         case "url":
  2925.             var image = this.images.get(backgroundImage.args[0]);
  2926.             if (image) {
  2927.                 this.renderBackgroundRepeating(container, bounds, image, arr.length - (index+1), borderData);
  2928.             } else {
  2929.                 log("Error loading background-image", backgroundImage.args[0]);
  2930.             }
  2931.             break;
  2932.         case "linear-gradient":
  2933.         case "gradient":
  2934.             var gradientImage = this.images.get(backgroundImage.value);
  2935.             if (gradientImage) {
  2936.                 this.renderBackgroundGradient(gradientImage, bounds, borderData);
  2937.             } else {
  2938.                 log("Error loading background-image", backgroundImage.args[0]);
  2939.             }
  2940.             break;
  2941.         case "none":
  2942.             break;
  2943.         default:
  2944.             log("Unknown background-image type", backgroundImage.args[0]);
  2945.         }
  2946.     }, this);
  2947. };
  2948.  
  2949. Renderer.prototype.renderBackgroundRepeating = function(container, bounds, imageContainer, index, borderData) {
  2950.     var size = container.parseBackgroundSize(bounds, imageContainer.image, index);
  2951.     var position = container.parseBackgroundPosition(bounds, imageContainer.image, index, size);
  2952.     var repeat = container.parseBackgroundRepeat(index);
  2953.     switch (repeat) {
  2954.     case "repeat-x":
  2955.     case "repeat no-repeat":
  2956.         this.backgroundRepeatShape(imageContainer, position, size, bounds, bounds.left + borderData[3], bounds.top + position.top + borderData[0], 99999, size.height, borderData);
  2957.         break;
  2958.     case "repeat-y":
  2959.     case "no-repeat repeat":
  2960.         this.backgroundRepeatShape(imageContainer, position, size, bounds, bounds.left + position.left + borderData[3], bounds.top + borderData[0], size.width, 99999, borderData);
  2961.         break;
  2962.     case "no-repeat":
  2963.         this.backgroundRepeatShape(imageContainer, position, size, bounds, bounds.left + position.left + borderData[3], bounds.top + position.top + borderData[0], size.width, size.height, borderData);
  2964.         break;
  2965.     default:
  2966.         this.renderBackgroundRepeat(imageContainer, position, size, {top: bounds.top, left: bounds.left}, borderData[3], borderData[0]);
  2967.         break;
  2968.     }
  2969. };
  2970.  
  2971. function StackingContext(hasOwnStacking, opacity, element, parent) {
  2972.     NodeContainer.call(this, element, parent);
  2973.     this.ownStacking = hasOwnStacking;
  2974.     this.contexts = [];
  2975.     this.children = [];
  2976.     this.opacity = (this.parent ? this.parent.stack.opacity : 1) * opacity;
  2977. }
  2978.  
  2979. StackingContext.prototype = Object.create(NodeContainer.prototype);
  2980.  
  2981. StackingContext.prototype.getParentStack = function(context) {
  2982.     var parentStack = (this.parent) ? this.parent.stack : null;
  2983.     return parentStack ? (parentStack.ownStacking ? parentStack : parentStack.getParentStack(context)) : context.stack;
  2984. };
  2985.  
  2986. function Support(document) {
  2987.     this.rangeBounds = this.testRangeBounds(document);
  2988.     this.cors = this.testCORS();
  2989.     this.svg = this.testSVG();
  2990. }
  2991.  
  2992. Support.prototype.testRangeBounds = function(document) {
  2993.     var range, testElement, rangeBounds, rangeHeight, support = false;
  2994.  
  2995.     if (document.createRange) {
  2996.         range = document.createRange();
  2997.         if (range.getBoundingClientRect) {
  2998.             testElement = document.createElement('boundtest');
  2999.             testElement.style.height = "123px";
  3000.             testElement.style.display = "block";
  3001.             document.body.appendChild(testElement);
  3002.  
  3003.             range.selectNode(testElement);
  3004.             rangeBounds = range.getBoundingClientRect();
  3005.             rangeHeight = rangeBounds.height;
  3006.  
  3007.             if (rangeHeight === 123) {
  3008.                 support = true;
  3009.             }
  3010.             document.body.removeChild(testElement);
  3011.         }
  3012.     }
  3013.  
  3014.     return support;
  3015. };
  3016.  
  3017. Support.prototype.testCORS = function() {
  3018.     return typeof((new Image()).crossOrigin) !== "undefined";
  3019. };
  3020.  
  3021. Support.prototype.testSVG = function() {
  3022.     var img = new Image();
  3023.     var canvas = document.createElement("canvas");
  3024.     var ctx =  canvas.getContext("2d");
  3025.     img.src = "data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg'></svg>";
  3026.  
  3027.     try {
  3028.         ctx.drawImage(img, 0, 0);
  3029.         canvas.toDataURL();
  3030.     } catch(e) {
  3031.         return false;
  3032.     }
  3033.     return true;
  3034. };
  3035.  
  3036. function SVGContainer(src) {
  3037.     this.src = src;
  3038.     this.image = null;
  3039.     var self = this;
  3040.  
  3041.     this.promise = this.hasFabric().then(function() {
  3042.         return (self.isInline(src) ? Promise.resolve(self.inlineFormatting(src)) : XHR(src));
  3043.     }).then(function(svg) {
  3044.         return new Promise(function(resolve) {
  3045.             html2canvas.fabric.loadSVGFromString(svg, self.createCanvas.call(self, resolve));
  3046.         });
  3047.     });
  3048. }
  3049.  
  3050. SVGContainer.prototype.hasFabric = function() {
  3051.     return !html2canvas.fabric ? Promise.reject(new Error("html2canvas.svg.js is not loaded, cannot render svg")) : Promise.resolve();
  3052. };
  3053.  
  3054. SVGContainer.prototype.inlineFormatting = function(src) {
  3055.     return (/^data:image\/svg\+xml;base64,/.test(src)) ? this.decode64(this.removeContentType(src)) : this.removeContentType(src);
  3056. };
  3057.  
  3058. SVGContainer.prototype.removeContentType = function(src) {
  3059.     return src.replace(/^data:image\/svg\+xml(;base64)?,/,'');
  3060. };
  3061.  
  3062. SVGContainer.prototype.isInline = function(src) {
  3063.     return (/^data:image\/svg\+xml/i.test(src));
  3064. };
  3065.  
  3066. SVGContainer.prototype.createCanvas = function(resolve) {
  3067.     var self = this;
  3068.     return function (objects, options) {
  3069.         var canvas = new html2canvas.fabric.StaticCanvas('c');
  3070.         self.image = canvas.lowerCanvasEl;
  3071.         canvas
  3072.             .setWidth(options.width)
  3073.             .setHeight(options.height)
  3074.             .add(html2canvas.fabric.util.groupSVGElements(objects, options))
  3075.             .renderAll();
  3076.         resolve(canvas.lowerCanvasEl);
  3077.     };
  3078. };
  3079.  
  3080. SVGContainer.prototype.decode64 = function(str) {
  3081.     return (typeof(window.atob) === "function") ? window.atob(str) : decode64(str);
  3082. };
  3083.  
  3084. /*
  3085.  * base64-arraybuffer
  3086.  * https://github.com/niklasvh/base64-arraybuffer
  3087.  *
  3088.  * Copyright (c) 2012 Niklas von Hertzen
  3089.  * Licensed under the MIT license.
  3090.  */
  3091.  
  3092. function decode64(base64) {
  3093.     var chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
  3094.     var len = base64.length, i, encoded1, encoded2, encoded3, encoded4, byte1, byte2, byte3;
  3095.  
  3096.     var output = "";
  3097.  
  3098.     for (i = 0; i < len; i+=4) {
  3099.         encoded1 = chars.indexOf(base64[i]);
  3100.         encoded2 = chars.indexOf(base64[i+1]);
  3101.         encoded3 = chars.indexOf(base64[i+2]);
  3102.         encoded4 = chars.indexOf(base64[i+3]);
  3103.  
  3104.         byte1 = (encoded1 << 2) | (encoded2 >> 4);
  3105.         byte2 = ((encoded2 & 15) << 4) | (encoded3 >> 2);
  3106.         byte3 = ((encoded3 & 3) << 6) | encoded4;
  3107.         if (encoded3 === 64) {
  3108.             output += String.fromCharCode(byte1);
  3109.         } else if (encoded4 === 64 || encoded4 === -1) {
  3110.             output += String.fromCharCode(byte1, byte2);
  3111.         } else{
  3112.             output += String.fromCharCode(byte1, byte2, byte3);
  3113.         }
  3114.     }
  3115.  
  3116.     return output;
  3117. }
  3118.  
  3119. function SVGNodeContainer(node, native) {
  3120.     this.src = node;
  3121.     this.image = null;
  3122.     var self = this;
  3123.  
  3124.     this.promise = native ? new Promise(function(resolve, reject) {
  3125.         self.image = new Image();
  3126.         self.image.onload = resolve;
  3127.         self.image.onerror = reject;
  3128.         self.image.src = "data:image/svg+xml," + (new XMLSerializer()).serializeToString(node);
  3129.         if (self.image.complete === true) {
  3130.             resolve(self.image);
  3131.         }
  3132.     }) : this.hasFabric().then(function() {
  3133.         return new Promise(function(resolve) {
  3134.             html2canvas.fabric.parseSVGDocument(node, self.createCanvas.call(self, resolve));
  3135.         });
  3136.     });
  3137. }
  3138.  
  3139. SVGNodeContainer.prototype = Object.create(SVGContainer.prototype);
  3140.  
  3141. function TextContainer(node, parent) {
  3142.     NodeContainer.call(this, node, parent);
  3143. }
  3144.  
  3145. TextContainer.prototype = Object.create(NodeContainer.prototype);
  3146.  
  3147. TextContainer.prototype.applyTextTransform = function() {
  3148.     this.node.data = this.transform(this.parent.css("textTransform"));
  3149. };
  3150.  
  3151. TextContainer.prototype.transform = function(transform) {
  3152.     var text = this.node.data;
  3153.     switch(transform){
  3154.         case "lowercase":
  3155.             return text.toLowerCase();
  3156.         case "capitalize":
  3157.             return text.replace(/(^|\s|:|-|\(|\))([a-z])/g, capitalize);
  3158.         case "uppercase":
  3159.             return text.toUpperCase();
  3160.         default:
  3161.             return text;
  3162.     }
  3163. };
  3164.  
  3165. function capitalize(m, p1, p2) {
  3166.     if (m.length > 0) {
  3167.         return p1 + p2.toUpperCase();
  3168.     }
  3169. }
  3170.  
  3171. function WebkitGradientContainer(imageData) {
  3172.     GradientContainer.apply(this, arguments);
  3173.     this.type = (imageData.args[0] === "linear") ? this.TYPES.LINEAR : this.TYPES.RADIAL;
  3174. }
  3175.  
  3176. WebkitGradientContainer.prototype = Object.create(GradientContainer.prototype);
  3177.  
  3178. function XHR(url) {
  3179.     return new Promise(function(resolve, reject) {
  3180.         var xhr = new XMLHttpRequest();
  3181.         xhr.open('GET', url);
  3182.  
  3183.         xhr.onload = function() {
  3184.             if (xhr.status === 200) {
  3185.                 resolve(xhr.responseText);
  3186.             } else {
  3187.                 reject(new Error(xhr.statusText));
  3188.             }
  3189.         };
  3190.  
  3191.         xhr.onerror = function() {
  3192.             reject(new Error("Network Error"));
  3193.         };
  3194.  
  3195.         xhr.send();
  3196.     });
  3197. }
  3198.  
  3199. function CanvasRenderer(width, height) {
  3200.     Renderer.apply(this, arguments);
  3201.     this.canvas = this.options.canvas || this.document.createElement("canvas");
  3202.     if (!this.options.canvas) {
  3203.         this.canvas.width = width;
  3204.         this.canvas.height = height;
  3205.     }
  3206.     this.ctx = this.canvas.getContext("2d");
  3207.     this.taintCtx = this.document.createElement("canvas").getContext("2d");
  3208.     this.ctx.textBaseline = "bottom";
  3209.     this.variables = {};
  3210.     log("Initialized CanvasRenderer with size", width, "x", height);
  3211. }
  3212.  
  3213. CanvasRenderer.prototype = Object.create(Renderer.prototype);
  3214.  
  3215. CanvasRenderer.prototype.setFillStyle = function(fillStyle) {
  3216.     this.ctx.fillStyle = typeof(fillStyle) === "object" && !!fillStyle.isColor ? fillStyle.toString() : fillStyle;
  3217.     return this.ctx;
  3218. };
  3219.  
  3220. CanvasRenderer.prototype.rectangle = function(left, top, width, height, color) {
  3221.     this.setFillStyle(color).fillRect(left, top, width, height);
  3222. };
  3223.  
  3224. CanvasRenderer.prototype.circle = function(left, top, size, color) {
  3225.     this.setFillStyle(color);
  3226.     this.ctx.beginPath();
  3227.     this.ctx.arc(left + size / 2, top + size / 2, size / 2, 0, Math.PI*2, true);
  3228.     this.ctx.closePath();
  3229.     this.ctx.fill();
  3230. };
  3231.  
  3232. CanvasRenderer.prototype.circleStroke = function(left, top, size, color, stroke, strokeColor) {
  3233.     this.circle(left, top, size, color);
  3234.     this.ctx.strokeStyle = strokeColor.toString();
  3235.     this.ctx.stroke();
  3236. };
  3237.  
  3238. CanvasRenderer.prototype.drawShape = function(shape, color) {
  3239.     this.shape(shape);
  3240.     this.setFillStyle(color).fill();
  3241. };
  3242.  
  3243. CanvasRenderer.prototype.taints = function(imageContainer) {
  3244.     if (imageContainer.tainted === null) {
  3245.         this.taintCtx.drawImage(imageContainer.image, 0, 0);
  3246.         try {
  3247.             this.taintCtx.getImageData(0, 0, 1, 1);
  3248.             imageContainer.tainted = false;
  3249.         } catch(e) {
  3250.             this.taintCtx = document.createElement("canvas").getContext("2d");
  3251.             imageContainer.tainted = true;
  3252.         }
  3253.     }
  3254.  
  3255.     return imageContainer.tainted;
  3256. };
  3257.  
  3258. CanvasRenderer.prototype.drawImage = function(imageContainer, sx, sy, sw, sh, dx, dy, dw, dh) {
  3259.     if (!this.taints(imageContainer) || this.options.allowTaint) {
  3260.         this.ctx.drawImage(imageContainer.image, sx, sy, sw, sh, dx, dy, dw, dh);
  3261.     }
  3262. };
  3263.  
  3264. CanvasRenderer.prototype.clip = function(shapes, callback, context) {
  3265.     this.ctx.save();
  3266.     shapes.filter(hasEntries).forEach(function(shape) {
  3267.         this.shape(shape).clip();
  3268.     }, this);
  3269.     callback.call(context);
  3270.     this.ctx.restore();
  3271. };
  3272.  
  3273. CanvasRenderer.prototype.shape = function(shape) {
  3274.     this.ctx.beginPath();
  3275.     shape.forEach(function(point, index) {
  3276.         if (point[0] === "rect") {
  3277.             this.ctx.rect.apply(this.ctx, point.slice(1));
  3278.         } else {
  3279.             this.ctx[(index === 0) ? "moveTo" : point[0] + "To" ].apply(this.ctx, point.slice(1));
  3280.         }
  3281.     }, this);
  3282.     this.ctx.closePath();
  3283.     return this.ctx;
  3284. };
  3285.  
  3286. CanvasRenderer.prototype.font = function(color, style, variant, weight, size, family) {
  3287.     this.setFillStyle(color).font = [style, variant, weight, size, family].join(" ").split(",")[0];
  3288. };
  3289.  
  3290. CanvasRenderer.prototype.fontShadow = function(color, offsetX, offsetY, blur) {
  3291.     this.setVariable("shadowColor", color.toString())
  3292.         .setVariable("shadowOffsetY", offsetX)
  3293.         .setVariable("shadowOffsetX", offsetY)
  3294.         .setVariable("shadowBlur", blur);
  3295. };
  3296.  
  3297. CanvasRenderer.prototype.clearShadow = function() {
  3298.     this.setVariable("shadowColor", "rgba(0,0,0,0)");
  3299. };
  3300.  
  3301. CanvasRenderer.prototype.setOpacity = function(opacity) {
  3302.     this.ctx.globalAlpha = opacity;
  3303. };
  3304.  
  3305. CanvasRenderer.prototype.setTransform = function(transform) {
  3306.     this.ctx.translate(transform.origin[0], transform.origin[1]);
  3307.     this.ctx.transform.apply(this.ctx, transform.matrix);
  3308.     this.ctx.translate(-transform.origin[0], -transform.origin[1]);
  3309. };
  3310.  
  3311. CanvasRenderer.prototype.setVariable = function(property, value) {
  3312.     if (this.variables[property] !== value) {
  3313.         this.variables[property] = this.ctx[property] = value;
  3314.     }
  3315.  
  3316.     return this;
  3317. };
  3318.  
  3319. CanvasRenderer.prototype.text = function(text, left, bottom) {
  3320.     this.ctx.fillText(text, left, bottom);
  3321. };
  3322.  
  3323. CanvasRenderer.prototype.backgroundRepeatShape = function(imageContainer, backgroundPosition, size, bounds, left, top, width, height, borderData) {
  3324.     var shape = [
  3325.         ["line", Math.round(left), Math.round(top)],
  3326.         ["line", Math.round(left + width), Math.round(top)],
  3327.         ["line", Math.round(left + width), Math.round(height + top)],
  3328.         ["line", Math.round(left), Math.round(height + top)]
  3329.     ];
  3330.     this.clip([shape], function() {
  3331.         this.renderBackgroundRepeat(imageContainer, backgroundPosition, size, bounds, borderData[3], borderData[0]);
  3332.     }, this);
  3333. };
  3334.  
  3335. CanvasRenderer.prototype.renderBackgroundRepeat = function(imageContainer, backgroundPosition, size, bounds, borderLeft, borderTop) {
  3336.     var offsetX = Math.round(bounds.left + backgroundPosition.left + borderLeft), offsetY = Math.round(bounds.top + backgroundPosition.top + borderTop);
  3337.     this.setFillStyle(this.ctx.createPattern(this.resizeImage(imageContainer, size), "repeat"));
  3338.     this.ctx.translate(offsetX, offsetY);
  3339.     this.ctx.fill();
  3340.     this.ctx.translate(-offsetX, -offsetY);
  3341. };
  3342.  
  3343. CanvasRenderer.prototype.renderBackgroundGradient = function(gradientImage, bounds) {
  3344.     if (gradientImage instanceof LinearGradientContainer) {
  3345.         var gradient = this.ctx.createLinearGradient(
  3346.             bounds.left + bounds.width * gradientImage.x0,
  3347.             bounds.top + bounds.height * gradientImage.y0,
  3348.             bounds.left +  bounds.width * gradientImage.x1,
  3349.             bounds.top +  bounds.height * gradientImage.y1);
  3350.         gradientImage.colorStops.forEach(function(colorStop) {
  3351.             gradient.addColorStop(colorStop.stop, colorStop.color.toString());
  3352.         });
  3353.         this.rectangle(bounds.left, bounds.top, bounds.width, bounds.height, gradient);
  3354.     }
  3355. };
  3356.  
  3357. CanvasRenderer.prototype.resizeImage = function(imageContainer, size) {
  3358.     var image = imageContainer.image;
  3359.     if(image.width === size.width && image.height === size.height) {
  3360.         return image;
  3361.     }
  3362.  
  3363.     var ctx, canvas = document.createElement('canvas');
  3364.     canvas.width = size.width;
  3365.     canvas.height = size.height;
  3366.     ctx = canvas.getContext("2d");
  3367.     ctx.drawImage(image, 0, 0, image.width, image.height, 0, 0, size.width, size.height );
  3368.     return canvas;
  3369. };
  3370.  
  3371. function hasEntries(array) {
  3372.     return array.length > 0;
  3373. }
  3374.  
  3375. }).call({}, typeof(window) !== "undefined" ? window : undefined, typeof(document) !== "undefined" ? document : undefined);