﻿/*
  html2canvas 0.5.0-alpha1 <http://html2canvas.hertzen.com>
  Copyright (c) 2015 Niklas von Hertzen

  Released under MIT License
*/

(function(window, document, exports, global, define, undefined){

/*!
 * @overview es6-promise - a tiny implementation of Promises/A+.
 * @copyright Copyright (c) 2014 Yehuda Katz, Tom Dale, Stefan Penner and contributors (Conversion to ES6 API by Jake Archibald)
 * @license   Licensed under MIT license
 *            See https://raw.githubusercontent.com/jakearchibald/es6-promise/master/LICENSE
 * @version   2.0.1
 */

    (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;
            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,
            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=
            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,
            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]"===
            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=
            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};
        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);
            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
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    if (window) {
        window.ES6Promise.polyfill();
    }


    if (typeof(document) === "undefined" || typeof(Object.create) !== "function" || typeof(document.createElement("canvas").getContext) !== "function") {
        (window || module.exports).html2canvas = function() {
            return Promise.reject("No canvas support");
        };
        return;
    }

/*! https://mths.be/punycode v1.3.1 by @mathias */
    ;(function(root) {

        /** Detect free variables */
        var freeExports = typeof exports == 'object' && exports &&
            !exports.nodeType && exports;
        var freeModule = typeof module == 'object' && module &&
            !module.nodeType && module;
        var freeGlobal = typeof global == 'object' && global;
        if (
            freeGlobal.global === freeGlobal ||
                freeGlobal.window === freeGlobal ||
                freeGlobal.self === freeGlobal
        ) {
            root = freeGlobal;
        }

        /**
         * The `punycode` object.
         * @name punycode
         * @type Object
         */
        var punycode,

            /** Highest positive signed 32-bit float value */
            maxInt = 2147483647, // aka. 0x7FFFFFFF or 2^31-1

            /** Bootstring parameters */
            base = 36,
            tMin = 1,
            tMax = 26,
            skew = 38,
            damp = 700,
            initialBias = 72,
            initialN = 128, // 0x80
            delimiter = '-', // '\x2D'

            /** Regular expressions */
            regexPunycode = /^xn--/,
            regexNonASCII = /[^\x20-\x7E]/, // unprintable ASCII chars + non-ASCII chars
            regexSeparators = /[\x2E\u3002\uFF0E\uFF61]/g, // RFC 3490 separators

            /** Error messages */
            errors = {
                'overflow': 'Overflow: input needs wider integers to process',
                'not-basic': 'Illegal input >= 0x80 (not a basic code point)',
                'invalid-input': 'Invalid input'
            },

            /** Convenience shortcuts */
            baseMinusTMin = base - tMin,
            floor = Math.floor,
            stringFromCharCode = String.fromCharCode,

            /** Temporary variable */
            key;

        /*--------------------------------------------------------------------------*/

        /**
         * A generic error utility function.
         * @private
         * @param {String} type The error type.
         * @returns {Error} Throws a `RangeError` with the applicable error message.
         */
        function error(type) {
            throw RangeError(errors[type]);
        }

        /**
         * A generic `Array#map` utility function.
         * @private
         * @param {Array} array The array to iterate over.
         * @param {Function} callback The function that gets called for every array
         * item.
         * @returns {Array} A new array of values returned by the callback function.
         */
        function map(array, fn) {
            var length = array.length;
            var result = [];
            while (length--) {
                result[length] = fn(array[length]);
            }
            return result;
        }

        /**
         * A simple `Array#map`-like wrapper to work with domain name strings or email
         * addresses.
         * @private
         * @param {String} domain The domain name or email address.
         * @param {Function} callback The function that gets called for every
         * character.
         * @returns {Array} A new string of characters returned by the callback
         * function.
         */
        function mapDomain(string, fn) {
            var parts = string.split('@');
            var result = '';
            if (parts.length > 1) {
                // In email addresses, only the domain name should be punycoded. Leave
                // the local part (i.e. everything up to `@`) intact.
                result = parts[0] + '@';
                string = parts[1];
            }
            var labels = string.split(regexSeparators);
            var encoded = map(labels, fn).join('.');
            return result + encoded;
        }

        /**
         * Creates an array containing the numeric code points of each Unicode
         * character in the string. While JavaScript uses UCS-2 internally,
         * this function will convert a pair of surrogate halves (each of which
         * UCS-2 exposes as separate characters) into a single code point,
         * matching UTF-16.
         * @see `punycode.ucs2.encode`
         * @see <https://mathiasbynens.be/notes/javascript-encoding>
         * @memberOf punycode.ucs2
         * @name decode
         * @param {String} string The Unicode input string (UCS-2).
         * @returns {Array} The new array of code points.
         */
        function ucs2decode(string) {
            var output = [],
                counter = 0,
                length = string.length,
                value,
                extra;
            while (counter < length) {
                value = string.charCodeAt(counter++);
                if (value >= 0xD800 && value <= 0xDBFF && counter < length) {
                    // high surrogate, and there is a next character
                    extra = string.charCodeAt(counter++);
                    if ((extra & 0xFC00) == 0xDC00) { // low surrogate
                        output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);
                    } else {
                        // unmatched surrogate; only append this code unit, in case the next
                        // code unit is the high surrogate of a surrogate pair
                        output.push(value);
                        counter--;
                    }
                } else {
                    output.push(value);
                }
            }
            return output;
        }

        /**
         * Creates a string based on an array of numeric code points.
         * @see `punycode.ucs2.decode`
         * @memberOf punycode.ucs2
         * @name encode
         * @param {Array} codePoints The array of numeric code points.
         * @returns {String} The new Unicode string (UCS-2).
         */
        function ucs2encode(array) {
            return map(array, function(value) {
                var output = '';
                if (value > 0xFFFF) {
                    value -= 0x10000;
                    output += stringFromCharCode(value >>> 10 & 0x3FF | 0xD800);
                    value = 0xDC00 | value & 0x3FF;
                }
                output += stringFromCharCode(value);
                return output;
            }).join('');
        }

        /**
         * Converts a basic code point into a digit/integer.
         * @see `digitToBasic()`
         * @private
         * @param {Number} codePoint The basic numeric code point value.
         * @returns {Number} The numeric value of a basic code point (for use in
         * representing integers) in the range `0` to `base - 1`, or `base` if
         * the code point does not represent a value.
         */
        function basicToDigit(codePoint) {
            if (codePoint - 48 < 10) {
                return codePoint - 22;
            }
            if (codePoint - 65 < 26) {
                return codePoint - 65;
            }
            if (codePoint - 97 < 26) {
                return codePoint - 97;
            }
            return base;
        }

        /**
         * Converts a digit/integer into a basic code point.
         * @see `basicToDigit()`
         * @private
         * @param {Number} digit The numeric value of a basic code point.
         * @returns {Number} The basic code point whose value (when used for
         * representing integers) is `digit`, which needs to be in the range
         * `0` to `base - 1`. If `flag` is non-zero, the uppercase form is
         * used; else, the lowercase form is used. The behavior is undefined
         * if `flag` is non-zero and `digit` has no uppercase form.
         */
        function digitToBasic(digit, flag) {
            //  0..25 map to ASCII a..z or A..Z
            // 26..35 map to ASCII 0..9
            return digit + 22 + 75 * (digit < 26) - ((flag != 0) << 5);
        }

        /**
         * Bias adaptation function as per section 3.4 of RFC 3492.
         * http://tools.ietf.org/html/rfc3492#section-3.4
         * @private
         */
        function adapt(delta, numPoints, firstTime) {
            var k = 0;
            delta = firstTime ? floor(delta / damp) : delta >> 1;
            delta += floor(delta / numPoints);
            for (/* no initialization */; delta > baseMinusTMin * tMax >> 1; k += base) {
                delta = floor(delta / baseMinusTMin);
            }
            return floor(k + (baseMinusTMin + 1) * delta / (delta + skew));
        }

        /**
         * Converts a Punycode string of ASCII-only symbols to a string of Unicode
         * symbols.
         * @memberOf punycode
         * @param {String} input The Punycode string of ASCII-only symbols.
         * @returns {String} The resulting string of Unicode symbols.
         */
        function decode(input) {
            // Don't use UCS-2
            var output = [],
                inputLength = input.length,
                out,
                i = 0,
                n = initialN,
                bias = initialBias,
                basic,
                j,
                index,
                oldi,
                w,
                k,
                digit,
                t,
                /** Cached calculation results */
                baseMinusT;

            // Handle the basic code points: let `basic` be the number of input code
            // points before the last delimiter, or `0` if there is none, then copy
            // the first basic code points to the output.

            basic = input.lastIndexOf(delimiter);
            if (basic < 0) {
                basic = 0;
            }

            for (j = 0; j < basic; ++j) {
                // if it's not a basic code point
                if (input.charCodeAt(j) >= 0x80) {
                    error('not-basic');
                }
                output.push(input.charCodeAt(j));
            }

            // Main decoding loop: start just after the last delimiter if any basic code
            // points were copied; start at the beginning otherwise.

            for (index = basic > 0 ? basic + 1 : 0; index < inputLength; /* no final expression */) {

                // `index` is the index of the next character to be consumed.
                // Decode a generalized variable-length integer into `delta`,
                // which gets added to `i`. The overflow checking is easier
                // if we increase `i` as we go, then subtract off its starting
                // value at the end to obtain `delta`.
                for (oldi = i, w = 1, k = base; /* no condition */; k += base) {

                    if (index >= inputLength) {
                        error('invalid-input');
                    }

                    digit = basicToDigit(input.charCodeAt(index++));

                    if (digit >= base || digit > floor((maxInt - i) / w)) {
                        error('overflow');
                    }

                    i += digit * w;
                    t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);

                    if (digit < t) {
                        break;
                    }

                    baseMinusT = base - t;
                    if (w > floor(maxInt / baseMinusT)) {
                        error('overflow');
                    }

                    w *= baseMinusT;

                }

                out = output.length + 1;
                bias = adapt(i - oldi, out, oldi == 0);

                // `i` was supposed to wrap around from `out` to `0`,
                // incrementing `n` each time, so we'll fix that now:
                if (floor(i / out) > maxInt - n) {
                    error('overflow');
                }

                n += floor(i / out);
                i %= out;

                // Insert `n` at position `i` of the output
                output.splice(i++, 0, n);

            }

            return ucs2encode(output);
        }

        /**
         * Converts a string of Unicode symbols (e.g. a domain name label) to a
         * Punycode string of ASCII-only symbols.
         * @memberOf punycode
         * @param {String} input The string of Unicode symbols.
         * @returns {String} The resulting Punycode string of ASCII-only symbols.
         */
        function encode(input) {
            var n,
                delta,
                handledCPCount,
                basicLength,
                bias,
                j,
                m,
                q,
                k,
                t,
                currentValue,
                output = [],
                /** `inputLength` will hold the number of code points in `input`. */
                inputLength,
                /** Cached calculation results */
                handledCPCountPlusOne,
                baseMinusT,
                qMinusT;

            // Convert the input in UCS-2 to Unicode
            input = ucs2decode(input);

            // Cache the length
            inputLength = input.length;

            // Initialize the state
            n = initialN;
            delta = 0;
            bias = initialBias;

            // Handle the basic code points
            for (j = 0; j < inputLength; ++j) {
                currentValue = input[j];
                if (currentValue < 0x80) {
                    output.push(stringFromCharCode(currentValue));
                }
            }

            handledCPCount = basicLength = output.length;

            // `handledCPCount` is the number of code points that have been handled;
            // `basicLength` is the number of basic code points.

            // Finish the basic string - if it is not empty - with a delimiter
            if (basicLength) {
                output.push(delimiter);
            }

            // Main encoding loop:
            while (handledCPCount < inputLength) {

                // All non-basic code points < n have been handled already. Find the next
                // larger one:
                for (m = maxInt, j = 0; j < inputLength; ++j) {
                    currentValue = input[j];
                    if (currentValue >= n && currentValue < m) {
                        m = currentValue;
                    }
                }

                // Increase `delta` enough to advance the decoder's <n,i> state to <m,0>,
                // but guard against overflow
                handledCPCountPlusOne = handledCPCount + 1;
                if (m - n > floor((maxInt - delta) / handledCPCountPlusOne)) {
                    error('overflow');
                }

                delta += (m - n) * handledCPCountPlusOne;
                n = m;

                for (j = 0; j < inputLength; ++j) {
                    currentValue = input[j];

                    if (currentValue < n && ++delta > maxInt) {
                        error('overflow');
                    }

                    if (currentValue == n) {
                        // Represent delta as a generalized variable-length integer
                        for (q = delta, k = base; /* no condition */; k += base) {
                            t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);
                            if (q < t) {
                                break;
                            }
                            qMinusT = q - t;
                            baseMinusT = base - t;
                            output.push(
                                stringFromCharCode(digitToBasic(t + qMinusT % baseMinusT, 0))
                            );
                            q = floor(qMinusT / baseMinusT);
                        }

                        output.push(stringFromCharCode(digitToBasic(q, 0)));
                        bias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength);
                        delta = 0;
                        ++handledCPCount;
                    }
                }

                ++delta;
                ++n;

            }
            return output.join('');
        }

        /**
         * Converts a Punycode string representing a domain name or an email address
         * to Unicode. Only the Punycoded parts of the input will be converted, i.e.
         * it doesn't matter if you call it on a string that has already been
         * converted to Unicode.
         * @memberOf punycode
         * @param {String} input The Punycoded domain name or email address to
         * convert to Unicode.
         * @returns {String} The Unicode representation of the given Punycode
         * string.
         */
        function toUnicode(input) {
            return mapDomain(input, function(string) {
                return regexPunycode.test(string)
                    ? decode(string.slice(4).toLowerCase())
                    : string;
            });
        }

        /**
         * Converts a Unicode string representing a domain name or an email address to
         * Punycode. Only the non-ASCII parts of the domain name will be converted,
         * i.e. it doesn't matter if you call it with a domain that's already in
         * ASCII.
         * @memberOf punycode
         * @param {String} input The domain name or email address to convert, as a
         * Unicode string.
         * @returns {String} The Punycode representation of the given domain name or
         * email address.
         */
        function toASCII(input) {
            return mapDomain(input, function(string) {
                return regexNonASCII.test(string)
                    ? 'xn--' + encode(string)
                    : string;
            });
        }

        /*--------------------------------------------------------------------------*/

        /** Define the public API */
        punycode = {
            /**
             * A string representing the current Punycode.js version number.
             * @memberOf punycode
             * @type String
             */
            'version': '1.3.1',
            /**
             * An object of methods to convert from JavaScript's internal character
             * representation (UCS-2) to Unicode code points, and back.
             * @see <https://mathiasbynens.be/notes/javascript-encoding>
             * @memberOf punycode
             * @type Object
             */
            'ucs2': {
                'decode': ucs2decode,
                'encode': ucs2encode
            },
            'decode': decode,
            'encode': encode,
            'toASCII': toASCII,
            'toUnicode': toUnicode
        };

        /** Expose `punycode` */
        // Some AMD build optimizers, like r.js, check for specific condition patterns
        // like the following:
        if (
            typeof define == 'function' &&
                typeof define.amd == 'object' &&
                define.amd
        ) {
            define('punycode', function() {
                return punycode;
            });
        } else if (freeExports && freeModule) {
            if (module.exports == freeExports) { // in Node.js or RingoJS v0.8.0+
                freeModule.exports = punycode;
            } else { // in Narwhal or RingoJS v0.7.0-
                for (key in punycode) {
                    punycode.hasOwnProperty(key) && (freeExports[key] = punycode[key]);
                }
            }
        } else { // in Rhino or a web browser
            root.punycode = punycode;
        }

    }(this));

    var html2canvasNodeAttribute = "data-html2canvas-node";
    var html2canvasCanvasCloneAttribute = "data-html2canvas-canvas-clone";
    var html2canvasCanvasCloneIndex = 0;
    var html2canvasCloneIndex = 0;

    window.html2canvas = function(nodeList, options) {
        var index = html2canvasCloneIndex++;
        options = options || {};
        if (options.logging) {
            window.html2canvas.logging = true;
            window.html2canvas.start = Date.now();
        }

        options.async = typeof(options.async) === "undefined" ? true : options.async;
        options.allowTaint = typeof(options.allowTaint) === "undefined" ? false : options.allowTaint;
        options.removeContainer = typeof(options.removeContainer) === "undefined" ? true : options.removeContainer;
        options.javascriptEnabled = typeof(options.javascriptEnabled) === "undefined" ? false : options.javascriptEnabled;
        options.imageTimeout = typeof(options.imageTimeout) === "undefined" ? 10000 : options.imageTimeout;
        options.renderer = typeof(options.renderer) === "function" ? options.renderer : CanvasRenderer;
        options.strict = !!options.strict;

        if (typeof(nodeList) === "string") {
            if (typeof(options.proxy) !== "string") {
                return Promise.reject("Proxy must be used when rendering url");
            }
            var width = options.width != null ? options.width : window.innerWidth;
            var height = options.height != null ? options.height : window.innerHeight;
            return loadUrlDocument(absoluteUrl(nodeList), options.proxy, document, width, height, options).then(function(container) {
                return renderWindow(container.contentWindow.document.documentElement, container, options, width, height);
            });
        }

        var node = ((nodeList === undefined) ? [document.documentElement] : ((nodeList.length) ? nodeList : [nodeList]))[0];
        node.setAttribute(html2canvasNodeAttribute + index, index);
        return renderDocument(node.ownerDocument, options, node.ownerDocument.defaultView.innerWidth, node.ownerDocument.defaultView.innerHeight, index).then(function(canvas) {
            if (typeof(options.onrendered) === "function") {
                log("options.onrendered is deprecated, html2canvas returns a Promise containing the canvas");
                options.onrendered(canvas);
            }
            return canvas;
        });
    };

    window.html2canvas.punycode = this.punycode;
    window.html2canvas.proxy = {};

    function renderDocument(document, options, windowWidth, windowHeight, html2canvasIndex) {
        return createWindowClone(document, document, windowWidth, windowHeight, options, document.defaultView.pageXOffset, document.defaultView.pageYOffset).then(function(container) {
            log("Document cloned");
            var attributeName = html2canvasNodeAttribute + html2canvasIndex;
            var selector = "[" + attributeName + "='" + html2canvasIndex + "']";
            document.querySelector(selector).removeAttribute(attributeName);
            var clonedWindow = container.contentWindow;
            var node = clonedWindow.document.querySelector(selector);
            var oncloneHandler = (typeof(options.onclone) === "function") ? Promise.resolve(options.onclone(clonedWindow.document)) : Promise.resolve(true);
            return oncloneHandler.then(function() {
                return renderWindow(node, container, options, windowWidth, windowHeight);
            });
        });
    }

    function renderWindow(node, container, options, windowWidth, windowHeight) {
        var clonedWindow = container.contentWindow;
        var support = new Support(clonedWindow.document);
        var imageLoader = new ImageLoader(options, support);
        var bounds = getBounds(node);
        var width = options.type === "view" ? windowWidth : documentWidth(clonedWindow.document);
        var height = options.type === "view" ? windowHeight : documentHeight(clonedWindow.document);
        var renderer = new options.renderer(width, height, imageLoader, options, document);
        var parser = new NodeParser(node, renderer, support, imageLoader, options);
        return parser.ready.then(function() {
            log("Finished rendering");
            var canvas;

            if (options.type === "view") {
                canvas = crop(renderer.canvas, {width: renderer.canvas.width, height: renderer.canvas.height, top: 0, left: 0, x: 0, y: 0});
            } else if (node === clonedWindow.document.body || node === clonedWindow.document.documentElement || options.canvas != null) {
                canvas = renderer.canvas;
            } else {
                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});
            }

            cleanupContainer(container, options);
            return canvas;
        });
    }

    function cleanupContainer(container, options) {
        if (options.removeContainer) {
            container.parentNode.removeChild(container);
            log("Cleaned up container");
        }
    }

    function crop(canvas, bounds) {
        var croppedCanvas = document.createElement("canvas");
        var x1 = Math.min(canvas.width - 1, Math.max(0, bounds.left));
        var x2 = Math.min(canvas.width, Math.max(1, bounds.left + bounds.width));
        var y1 = Math.min(canvas.height - 1, Math.max(0, bounds.top));
        var y2 = Math.min(canvas.height, Math.max(1, bounds.top + bounds.height));
        croppedCanvas.width = bounds.width;
        croppedCanvas.height =  bounds.height;
        log("Cropping canvas at:", "left:", bounds.left, "top:", bounds.top, "width:", (x2-x1), "height:", (y2-y1));
        log("Resulting crop with width", bounds.width, "and height", bounds.height, " with x", x1, "and y", y1);
        croppedCanvas.getContext("2d").drawImage(canvas, x1, y1, x2-x1, y2-y1, bounds.x, bounds.y, x2-x1, y2-y1);
        return croppedCanvas;
    }

    function documentWidth (doc) {
        return Math.max(
            Math.max(doc.body.scrollWidth, doc.documentElement.scrollWidth),
            Math.max(doc.body.offsetWidth, doc.documentElement.offsetWidth),
            Math.max(doc.body.clientWidth, doc.documentElement.clientWidth)
        );
    }

    function documentHeight (doc) {
        return Math.max(
            Math.max(doc.body.scrollHeight, doc.documentElement.scrollHeight),
            Math.max(doc.body.offsetHeight, doc.documentElement.offsetHeight),
            Math.max(doc.body.clientHeight, doc.documentElement.clientHeight)
        );
    }

    function smallImage() {
        return "data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7";
    }

    function isIE9() {
        return document.documentMode && document.documentMode <= 9;
    }

// https://github.com/niklasvh/html2canvas/issues/503
    function cloneNodeIE9(node, javascriptEnabled) {
        var clone = node.nodeType === 3 ? document.createTextNode(node.nodeValue) : node.cloneNode(false);

        var child = node.firstChild;
        while(child) {
            if (javascriptEnabled === true || child.nodeType !== 1 || child.nodeName !== 'SCRIPT') {
                clone.appendChild(cloneNodeIE9(child, javascriptEnabled));
            }
            child = child.nextSibling;
        }

        return clone;
    }

    function createWindowClone(ownerDocument, containerDocument, width, height, options, x ,y) {
        labelCanvasElements(ownerDocument);
        var documentElement = isIE9() ? cloneNodeIE9(ownerDocument.documentElement, options.javascriptEnabled) : ownerDocument.documentElement.cloneNode(true);
        var container = containerDocument.createElement("iframe");

        container.className = "html2canvas-container";
        container.style.visibility = "hidden";
        container.style.position = "fixed";
        container.style.left = "-10000px";
        container.style.top = "0px";
        container.style.border = "0";
        container.width = width;
        container.height = height;
        container.scrolling = "no"; // ios won't scroll without it
        containerDocument.body.appendChild(container);

        return new Promise(function(resolve) {
            var documentClone = container.contentWindow.document;

            cloneNodeValues(ownerDocument.documentElement, documentElement, "textarea");
            cloneNodeValues(ownerDocument.documentElement, documentElement, "select");

            /* Chrome doesn't detect relative background-images assigned in inline <style> sheets when fetched through getComputedStyle
             if window url is about:blank, we can assign the url to current by writing onto the document
             */
            container.contentWindow.onload = container.onload = function() {
                var interval = setInterval(function() {
                    if (documentClone.body.childNodes.length > 0) {
                        cloneCanvasContents(ownerDocument, documentClone);
                        clearInterval(interval);
                        if (options.type === "view") {
                            container.contentWindow.scrollTo(x, y);
                        }
                        resolve(container);
                    }
                }, 50);
            };

            documentClone.open();
            documentClone.write("<!DOCTYPE html><html></html>");
            // Chrome scrolls the parent document for some reason after the write to the cloned window???
            restoreOwnerScroll(ownerDocument, x, y);
            documentClone.replaceChild(options.javascriptEnabled === true ? documentClone.adoptNode(documentElement) : removeScriptNodes(documentClone.adoptNode(documentElement)), documentClone.documentElement);
            documentClone.close();
        });
    }

    function cloneNodeValues(document, clone, nodeName) {
        var originalNodes = document.getElementsByTagName(nodeName);
        var clonedNodes = clone.getElementsByTagName(nodeName);
        var count = originalNodes.length;
        for (var i = 0; i < count; i++) {
            clonedNodes[i].value = originalNodes[i].value;
        }
    }

    function restoreOwnerScroll(ownerDocument, x, y) {
        if (ownerDocument.defaultView && (x !== ownerDocument.defaultView.pageXOffset || y !== ownerDocument.defaultView.pageYOffset)) {
            ownerDocument.defaultView.scrollTo(x, y);
        }
    }

    function loadUrlDocument(src, proxy, document, width, height, options) {
        return new Proxy(src, proxy, window.document).then(documentFromHTML(src)).then(function(doc) {
            return createWindowClone(doc, document, width, height, options, 0, 0);
        });
    }

    function documentFromHTML(src) {
        return function(html) {
            var parser = new DOMParser(), doc;
            try {
                doc = parser.parseFromString(html, "text/html");
            } catch(e) {
                log("DOMParser not supported, falling back to createHTMLDocument");
                doc = document.implementation.createHTMLDocument("");
                try {
                    doc.open();
                    doc.write(html);
                    doc.close();
                } catch(ee) {
                    log("createHTMLDocument write not supported, falling back to document.body.innerHTML");
                    doc.body.innerHTML = html; // ie9 doesnt support writing to documentElement
                }
            }

            var b = doc.querySelector("base");
            if (!b || !b.href.host) {
                var base = doc.createElement("base");
                base.href = src;
                doc.head.insertBefore(base, doc.head.firstChild);
            }

            return doc;
        };
    }


    function labelCanvasElements(ownerDocument) {
        [].slice.call(ownerDocument.querySelectorAll("canvas"), 0).forEach(function(canvas) {
            canvas.setAttribute(html2canvasCanvasCloneAttribute, "canvas-" + html2canvasCanvasCloneIndex++);
        });
    }

    function cloneCanvasContents(ownerDocument, documentClone) {
        [].slice.call(ownerDocument.querySelectorAll("[" + html2canvasCanvasCloneAttribute + "]"), 0).forEach(function(canvas) {
            try {
                var clonedCanvas = documentClone.querySelector('[' + html2canvasCanvasCloneAttribute + '="' + canvas.getAttribute(html2canvasCanvasCloneAttribute) + '"]');
                if (clonedCanvas) {
                    clonedCanvas.width = canvas.width;
                    clonedCanvas.height = canvas.height;
                    clonedCanvas.getContext("2d").putImageData(canvas.getContext("2d").getImageData(0, 0, canvas.width, canvas.height), 0, 0);
                }
            } catch(e) {
                log("Unable to copy canvas content from", canvas, e);
            }
            canvas.removeAttribute(html2canvasCanvasCloneAttribute);
        });
    }

    function removeScriptNodes(parent) {
        [].slice.call(parent.childNodes, 0).filter(isElementNode).forEach(function(node) {
            if (node.tagName === "SCRIPT") {
                parent.removeChild(node);
            } else {
                removeScriptNodes(node);
            }
        });
        return parent;
    }

    function isElementNode(node) {
        return node.nodeType === Node.ELEMENT_NODE;
    }

    function absoluteUrl(url) {
        var link = document.createElement("a");
        link.href = url;
        link.href = link.href;
        return link;
    }

// http://dev.w3.org/csswg/css-color/

    function Color(value) {
        this.r = 0;
        this.g = 0;
        this.b = 0;
        this.a = null;
        var result = this.fromArray(value) ||
            this.namedColor(value) ||
            this.rgb(value) ||
            this.rgba(value) ||
            this.hex6(value) ||
            this.hex3(value);
    }

    Color.prototype.darken = function(amount) {
        var a = 1 - amount;
        return  new Color([
            Math.round(this.r * a),
            Math.round(this.g * a),
            Math.round(this.b * a),
            this.a
        ]);
    };

    Color.prototype.isTransparent = function() {
        return this.a === 0;
    };

    Color.prototype.isBlack = function() {
        return this.r === 0 && this.g === 0 && this.b === 0;
    };

    Color.prototype.fromArray = function(array) {
        if (Array.isArray(array)) {
            this.r = Math.min(array[0], 255);
            this.g = Math.min(array[1], 255);
            this.b = Math.min(array[2], 255);
            if (array.length > 3) {
                this.a = array[3];
            }
        }

        return (Array.isArray(array));
    };

    var _hex3 = /^#([a-f0-9]{3})$/i;

    Color.prototype.hex3 = function(value) {
        var match = null;
        if ((match = value.match(_hex3)) !== null) {
            this.r = parseInt(match[1][0] + match[1][0], 16);
            this.g = parseInt(match[1][1] + match[1][1], 16);
            this.b = parseInt(match[1][2] + match[1][2], 16);
        }
        return match !== null;
    };

    var _hex6 = /^#([a-f0-9]{6})$/i;

    Color.prototype.hex6 = function(value) {
        var match = null;
        if ((match = value.match(_hex6)) !== null) {
            this.r = parseInt(match[1].substring(0, 2), 16);
            this.g = parseInt(match[1].substring(2, 4), 16);
            this.b = parseInt(match[1].substring(4, 6), 16);
        }
        return match !== null;
    };


    var _rgb = /^rgb\((\d{1,3}) *, *(\d{1,3}) *, *(\d{1,3})\)$/;

    Color.prototype.rgb = function(value) {
        var match = null;
        if ((match = value.match(_rgb)) !== null) {
            this.r = Number(match[1]);
            this.g = Number(match[2]);
            this.b = Number(match[3]);
        }
        return match !== null;
    };

    var _rgba = /^rgba\((\d{1,3}) *, *(\d{1,3}) *, *(\d{1,3}) *, *(\d+\.?\d*)\)$/;

    Color.prototype.rgba = function(value) {
        var match = null;
        if ((match = value.match(_rgba)) !== null) {
            this.r = Number(match[1]);
            this.g = Number(match[2]);
            this.b = Number(match[3]);
            this.a = Number(match[4]);
        }
        return match !== null;
    };

    Color.prototype.toString = function() {
        return this.a !== null && this.a !== 1 ?
            "rgba(" + [this.r, this.g, this.b, this.a].join(",") + ")" :
            "rgb(" + [this.r, this.g, this.b].join(",") + ")";
    };

    Color.prototype.namedColor = function(value) {
        var color = colors[value.toLowerCase()];
        if (color) {
            this.r = color[0];
            this.g = color[1];
            this.b = color[2];
        } else if (value.toLowerCase() === "transparent") {
            this.r = this.g = this.b = this.a = 0;
            return true;
        }

        return !!color;
    };

    Color.prototype.isColor = true;

// 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}, {}))
    var colors = {
        "aliceblue": [240, 248, 255],
        "antiquewhite": [250, 235, 215],
        "aqua": [0, 255, 255],
        "aquamarine": [127, 255, 212],
        "azure": [240, 255, 255],
        "beige": [245, 245, 220],
        "bisque": [255, 228, 196],
        "black": [0, 0, 0],
        "blanchedalmond": [255, 235, 205],
        "blue": [0, 0, 255],
        "blueviolet": [138, 43, 226],
        "brown": [165, 42, 42],
        "burlywood": [222, 184, 135],
        "cadetblue": [95, 158, 160],
        "chartreuse": [127, 255, 0],
        "chocolate": [210, 105, 30],
        "coral": [255, 127, 80],
        "cornflowerblue": [100, 149, 237],
        "cornsilk": [255, 248, 220],
        "crimson": [220, 20, 60],
        "cyan": [0, 255, 255],
        "darkblue": [0, 0, 139],
        "darkcyan": [0, 139, 139],
        "darkgoldenrod": [184, 134, 11],
        "darkgray": [169, 169, 169],
        "darkgreen": [0, 100, 0],
        "darkgrey": [169, 169, 169],
        "darkkhaki": [189, 183, 107],
        "darkmagenta": [139, 0, 139],
        "darkolivegreen": [85, 107, 47],
        "darkorange": [255, 140, 0],
        "darkorchid": [153, 50, 204],
        "darkred": [139, 0, 0],
        "darksalmon": [233, 150, 122],
        "darkseagreen": [143, 188, 143],
        "darkslateblue": [72, 61, 139],
        "darkslategray": [47, 79, 79],
        "darkslategrey": [47, 79, 79],
        "darkturquoise": [0, 206, 209],
        "darkviolet": [148, 0, 211],
        "deeppink": [255, 20, 147],
        "deepskyblue": [0, 191, 255],
        "dimgray": [105, 105, 105],
        "dimgrey": [105, 105, 105],
        "dodgerblue": [30, 144, 255],
        "firebrick": [178, 34, 34],
        "floralwhite": [255, 250, 240],
        "forestgreen": [34, 139, 34],
        "fuchsia": [255, 0, 255],
        "gainsboro": [220, 220, 220],
        "ghostwhite": [248, 248, 255],
        "gold": [255, 215, 0],
        "goldenrod": [218, 165, 32],
        "gray": [128, 128, 128],
        "green": [0, 128, 0],
        "greenyellow": [173, 255, 47],
        "grey": [128, 128, 128],
        "honeydew": [240, 255, 240],
        "hotpink": [255, 105, 180],
        "indianred": [205, 92, 92],
        "indigo": [75, 0, 130],
        "ivory": [255, 255, 240],
        "khaki": [240, 230, 140],
        "lavender": [230, 230, 250],
        "lavenderblush": [255, 240, 245],
        "lawngreen": [124, 252, 0],
        "lemonchiffon": [255, 250, 205],
        "lightblue": [173, 216, 230],
        "lightcoral": [240, 128, 128],
        "lightcyan": [224, 255, 255],
        "lightgoldenrodyellow": [250, 250, 210],
        "lightgray": [211, 211, 211],
        "lightgreen": [144, 238, 144],
        "lightgrey": [211, 211, 211],
        "lightpink": [255, 182, 193],
        "lightsalmon": [255, 160, 122],
        "lightseagreen": [32, 178, 170],
        "lightskyblue": [135, 206, 250],
        "lightslategray": [119, 136, 153],
        "lightslategrey": [119, 136, 153],
        "lightsteelblue": [176, 196, 222],
        "lightyellow": [255, 255, 224],
        "lime": [0, 255, 0],
        "limegreen": [50, 205, 50],
        "linen": [250, 240, 230],
        "magenta": [255, 0, 255],
        "maroon": [128, 0, 0],
        "mediumaquamarine": [102, 205, 170],
        "mediumblue": [0, 0, 205],
        "mediumorchid": [186, 85, 211],
        "mediumpurple": [147, 112, 219],
        "mediumseagreen": [60, 179, 113],
        "mediumslateblue": [123, 104, 238],
        "mediumspringgreen": [0, 250, 154],
        "mediumturquoise": [72, 209, 204],
        "mediumvioletred": [199, 21, 133],
        "midnightblue": [25, 25, 112],
        "mintcream": [245, 255, 250],
        "mistyrose": [255, 228, 225],
        "moccasin": [255, 228, 181],
        "navajowhite": [255, 222, 173],
        "navy": [0, 0, 128],
        "oldlace": [253, 245, 230],
        "olive": [128, 128, 0],
        "olivedrab": [107, 142, 35],
        "orange": [255, 165, 0],
        "orangered": [255, 69, 0],
        "orchid": [218, 112, 214],
        "palegoldenrod": [238, 232, 170],
        "palegreen": [152, 251, 152],
        "paleturquoise": [175, 238, 238],
        "palevioletred": [219, 112, 147],
        "papayawhip": [255, 239, 213],
        "peachpuff": [255, 218, 185],
        "peru": [205, 133, 63],
        "pink": [255, 192, 203],
        "plum": [221, 160, 221],
        "powderblue": [176, 224, 230],
        "purple": [128, 0, 128],
        "rebeccapurple": [102, 51, 153],
        "red": [255, 0, 0],
        "rosybrown": [188, 143, 143],
        "royalblue": [65, 105, 225],
        "saddlebrown": [139, 69, 19],
        "salmon": [250, 128, 114],
        "sandybrown": [244, 164, 96],
        "seagreen": [46, 139, 87],
        "seashell": [255, 245, 238],
        "sienna": [160, 82, 45],
        "silver": [192, 192, 192],
        "skyblue": [135, 206, 235],
        "slateblue": [106, 90, 205],
        "slategray": [112, 128, 144],
        "slategrey": [112, 128, 144],
        "snow": [255, 250, 250],
        "springgreen": [0, 255, 127],
        "steelblue": [70, 130, 180],
        "tan": [210, 180, 140],
        "teal": [0, 128, 128],
        "thistle": [216, 191, 216],
        "tomato": [255, 99, 71],
        "turquoise": [64, 224, 208],
        "violet": [238, 130, 238],
        "wheat": [245, 222, 179],
        "white": [255, 255, 255],
        "whitesmoke": [245, 245, 245],
        "yellow": [255, 255, 0],
        "yellowgreen": [154, 205, 50]
    };


    function DummyImageContainer(src) {
        this.src = src;
        log("DummyImageContainer for", src);
        if (!this.promise || !this.image) {
            log("Initiating DummyImageContainer");
            DummyImageContainer.prototype.image = new Image();
            var image = this.image;
            DummyImageContainer.prototype.promise = new Promise(function(resolve, reject) {
                image.onload = resolve;
                image.onerror = reject;
                image.src = smallImage();
                if (image.complete === true) {
                    resolve(image);
                }
            });
        }
    }

    function Font(family, size) {
        var container = document.createElement('div'),
            img = document.createElement('img'),
            span = document.createElement('span'),
            sampleText = 'Hidden Text',
            baseline,
            middle;

        container.style.visibility = "hidden";
        container.style.fontFamily = family;
        container.style.fontSize = size;
        container.style.margin = 0;
        container.style.padding = 0;

        document.body.appendChild(container);

        img.src = smallImage();
        img.width = 1;
        img.height = 1;

        img.style.margin = 0;
        img.style.padding = 0;
        img.style.verticalAlign = "baseline";

        span.style.fontFamily = family;
        span.style.fontSize = size;
        span.style.margin = 0;
        span.style.padding = 0;

        span.appendChild(document.createTextNode(sampleText));
        container.appendChild(span);
        container.appendChild(img);
        baseline = (img.offsetTop - span.offsetTop) + 1;

        container.removeChild(span);
        container.appendChild(document.createTextNode(sampleText));

        container.style.lineHeight = "normal";
        img.style.verticalAlign = "super";

        middle = (img.offsetTop-container.offsetTop) + 1;

        document.body.removeChild(container);

        this.baseline = baseline;
        this.lineWidth = 1;
        this.middle = middle;
    }

    function FontMetrics() {
        this.data = {};
    }

    FontMetrics.prototype.getMetrics = function(family, size) {
        if (this.data[family + "-" + size] === undefined) {
            this.data[family + "-" + size] = new Font(family, size);
        }
        return this.data[family + "-" + size];
    };

    function FrameContainer(container, sameOrigin, options) {
        this.image = null;
        this.src = container;
        var self = this;
        var bounds = getBounds(container);
        this.promise = (!sameOrigin ? this.proxyLoad(options.proxy, bounds, options) : new Promise(function(resolve) {
            if (container.contentWindow.document.URL === "about:blank" || container.contentWindow.document.documentElement == null) {
                container.contentWindow.onload = container.onload = function() {
                    resolve(container);
                };
            } else {
                resolve(container);
            }
        })).then(function(container) {
            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});
        }).then(function(canvas) {
            return self.image = canvas;
        });
    }

    FrameContainer.prototype.proxyLoad = function(proxy, bounds, options) {
        var container = this.src;
        return loadUrlDocument(container.src, proxy, container.ownerDocument, bounds.width, bounds.height, options);
    };

    function GradientContainer(imageData) {
        this.src = imageData.value;
        this.colorStops = [];
        this.type = null;
        this.x0 = 0.5;
        this.y0 = 0.5;
        this.x1 = 0.5;
        this.y1 = 0.5;
        this.promise = Promise.resolve(true);
    }

    GradientContainer.prototype.TYPES = {
        LINEAR: 1,
        RADIAL: 2
    };

    function ImageContainer(src, cors) {
        this.src = src;
        this.image = new Image();
        var self = this;
        this.tainted = null;
        this.promise = new Promise(function(resolve, reject) {
            self.image.onload = resolve;
            self.image.onerror = reject;
            if (cors) {
                self.image.crossOrigin = "anonymous";
            }
            self.image.src = src;
            if (self.image.complete === true) {
                resolve(self.image);
            }
        });
    }

    function ImageLoader(options, support) {
        this.link = null;
        this.options = options;
        this.support = support;
        this.origin = this.getOrigin(window.location.href);
    }

    ImageLoader.prototype.findImages = function(nodes) {
        var images = [];
        nodes.reduce(function(imageNodes, container) {
            switch(container.node.nodeName) {
            case "IMG":
                return imageNodes.concat([{
                    args: [container.node.src],
                    method: "url"
                }]);
            case "svg":
            case "IFRAME":
                return imageNodes.concat([{
                    args: [container.node],
                    method: container.node.nodeName
                }]);
            }
            return imageNodes;
        }, []).forEach(this.addImage(images, this.loadImage), this);
        return images;
    };

    ImageLoader.prototype.findBackgroundImage = function(images, container) {
        container.parseBackgroundImages().filter(this.hasImageBackground).forEach(this.addImage(images, this.loadImage), this);
        return images;
    };

    ImageLoader.prototype.addImage = function(images, callback) {
        return function(newImage) {
            newImage.args.forEach(function(image) {
                if (!this.imageExists(images, image)) {
                    images.splice(0, 0, callback.call(this, newImage));
                    log('Added image #' + (images.length), typeof(image) === "string" ? image.substring(0, 100) : image);
                }
            }, this);
        };
    };

    ImageLoader.prototype.hasImageBackground = function(imageData) {
        return imageData.method !== "none";
    };

    ImageLoader.prototype.loadImage = function(imageData) {
        if (imageData.method === "url") {
            var src = imageData.args[0];
            if (this.isSVG(src) && !this.support.svg && !this.options.allowTaint) {
                return new SVGContainer(src);
            } else if (src.match(/data:image\/.*;base64,/i)) {
                return new ImageContainer(src.replace(/url\(['"]{0,}|['"]{0,}\)$/ig, ''), false);
            } else if (this.isSameOrigin(src) || this.options.allowTaint === true || this.isSVG(src)) {
                return new ImageContainer(src, false);
            } else if (this.support.cors && !this.options.allowTaint && this.options.useCORS) {
                return new ImageContainer(src, true);
            } else if (this.options.proxy) {
                return new ProxyImageContainer(src, this.options.proxy);
            } else {
                return new DummyImageContainer(src);
            }
        } else if (imageData.method === "linear-gradient") {
            return new LinearGradientContainer(imageData);
        } else if (imageData.method === "gradient") {
            return new WebkitGradientContainer(imageData);
        } else if (imageData.method === "svg") {
            return new SVGNodeContainer(imageData.args[0], this.support.svg);
        } else if (imageData.method === "IFRAME") {
            return new FrameContainer(imageData.args[0], this.isSameOrigin(imageData.args[0].src), this.options);
        } else {
            return new DummyImageContainer(imageData);
        }
    };

    ImageLoader.prototype.isSVG = function(src) {
        return src.substring(src.length - 3).toLowerCase() === "svg" || SVGContainer.prototype.isInline(src);
    };

    ImageLoader.prototype.imageExists = function(images, src) {
        return images.some(function(image) {
            return image.src === src;
        });
    };

    ImageLoader.prototype.isSameOrigin = function(url) {
        return (this.getOrigin(url) === this.origin);
    };

    ImageLoader.prototype.getOrigin = function(url) {
        var link = this.link || (this.link = document.createElement("a"));
        link.href = url;
        link.href = link.href; // IE9, LOL! - http://jsfiddle.net/niklasvh/2e48b/
        return link.protocol + link.hostname + link.port;
    };

    ImageLoader.prototype.getPromise = function(container) {
        return this.timeout(container, this.options.imageTimeout)['catch'](function() {
            var dummy = new DummyImageContainer(container.src);
            return dummy.promise.then(function(image) {
                container.image = image;
            });
        });
    };

    ImageLoader.prototype.get = function(src) {
        var found = null;
        return this.images.some(function(img) {
            return (found = img).src === src;
        }) ? found : null;
    };

    ImageLoader.prototype.fetch = function(nodes) {
        this.images = nodes.reduce(bind(this.findBackgroundImage, this), this.findImages(nodes));
        this.images.forEach(function(image, index) {
            image.promise.then(function() {
                log("Succesfully loaded image #"+ (index+1), image);
            }, function(e) {
                log("Failed loading image #"+ (index+1), image, e);
            });
        });
        this.ready = Promise.all(this.images.map(this.getPromise, this));
        log("Finished searching images");
        return this;
    };

    ImageLoader.prototype.timeout = function(container, timeout) {
        var timer;
        var promise = Promise.race([container.promise, new Promise(function(res, reject) {
            timer = setTimeout(function() {
                log("Timed out loading image", container);
                reject(container);
            }, timeout);
        })]).then(function(container) {
            clearTimeout(timer);
            return container;
        });
        promise['catch'](function() {
            clearTimeout(timer);
        });
        return promise;
    };

    function LinearGradientContainer(imageData) {
        GradientContainer.apply(this, arguments);
        this.type = this.TYPES.LINEAR;

        var hasDirection = imageData.args[0].match(this.stepRegExp) === null;

        if (hasDirection) {
            imageData.args[0].split(" ").reverse().forEach(function(position) {
                switch(position) {
                case "left":
                    this.x0 = 0;
                    this.x1 = 1;
                    break;
                case "top":
                    this.y0 = 0;
                    this.y1 = 1;
                    break;
                case "right":
                    this.x0 = 1;
                    this.x1 = 0;
                    break;
                case "bottom":
                    this.y0 = 1;
                    this.y1 = 0;
                    break;
                case "to":
                    var y0 = this.y0;
                    var x0 = this.x0;
                    this.y0 = this.y1;
                    this.x0 = this.x1;
                    this.x1 = x0;
                    this.y1 = y0;
                    break;
                }
            }, this);
        } else {
            this.y0 = 0;
            this.y1 = 1;
        }

        this.colorStops = imageData.args.slice(hasDirection ? 1 : 0).map(function(colorStop) {
            var colorStopMatch = colorStop.match(this.stepRegExp);
            return {
                color: new Color(colorStopMatch[1]),
                stop: colorStopMatch[3] === "%" ? colorStopMatch[2] / 100 : null
            };
        }, this);

        if (this.colorStops[0].stop === null) {
            this.colorStops[0].stop = 0;
        }

        if (this.colorStops[this.colorStops.length - 1].stop === null) {
            this.colorStops[this.colorStops.length - 1].stop = 1;
        }

        this.colorStops.forEach(function(colorStop, index) {
            if (colorStop.stop === null) {
                this.colorStops.slice(index).some(function(find, count) {
                    if (find.stop !== null) {
                        colorStop.stop = ((find.stop - this.colorStops[index - 1].stop) / (count + 1)) + this.colorStops[index - 1].stop;
                        return true;
                    } else {
                        return false;
                    }
                }, this);
            }
        }, this);
    }

    LinearGradientContainer.prototype = Object.create(GradientContainer.prototype);

    LinearGradientContainer.prototype.stepRegExp = /((?:rgb|rgba)\(\d{1,3},\s\d{1,3},\s\d{1,3}(?:,\s[0-9\.]+)?\))\s*(\d{1,3})?(%|px)?/;

    function log() {
        if (window.html2canvas.logging && window.console && window.console.log) {
            Function.prototype.bind.call(window.console.log, (window.console)).apply(window.console, [(Date.now() - window.html2canvas.start) + "ms", "html2canvas:"].concat([].slice.call(arguments, 0)));
        }
    }

    function NodeContainer(node, parent) {
        this.node = node;
        this.parent = parent;
        this.stack = null;
        this.bounds = null;
        this.borders = null;
        this.clip = [];
        this.backgroundClip = [];
        this.offsetBounds = null;
        this.visible = null;
        this.computedStyles = null;
        this.colors = {};
        this.styles = {};
        this.backgroundImages = null;
        this.transformData = null;
        this.transformMatrix = null;
        this.isPseudoElement = false;
        this.opacity = null;
    }

    NodeContainer.prototype.cloneTo = function(stack) {
        stack.visible = this.visible;
        stack.borders = this.borders;
        stack.bounds = this.bounds;
        stack.clip = this.clip;
        stack.backgroundClip = this.backgroundClip;
        stack.computedStyles = this.computedStyles;
        stack.styles = this.styles;
        stack.backgroundImages = this.backgroundImages;
        stack.opacity = this.opacity;
    };

    NodeContainer.prototype.getOpacity = function() {
        return this.opacity === null ? (this.opacity = this.cssFloat('opacity')) : this.opacity;
    };

    NodeContainer.prototype.assignStack = function(stack) {
        this.stack = stack;
        stack.children.push(this);
    };

    NodeContainer.prototype.isElementVisible = function() {
        return this.node.nodeType === Node.TEXT_NODE ? this.parent.visible : (
            this.css('display') !== "none" &&
                this.css('visibility') !== "hidden" &&
                !this.node.hasAttribute("data-html2canvas-ignore") &&
                (this.node.nodeName !== "INPUT" || this.node.getAttribute("type") !== "hidden")
        );
    };

    NodeContainer.prototype.css = function(attribute) {
        if (!this.computedStyles) {
            this.computedStyles = this.isPseudoElement ? this.parent.computedStyle(this.before ? ":before" : ":after") : this.computedStyle(null);
        }

        return this.styles[attribute] || (this.styles[attribute] = this.computedStyles[attribute]);
    };

    NodeContainer.prototype.prefixedCss = function(attribute) {
        var prefixes = ["webkit", "moz", "ms", "o"];
        var value = this.css(attribute);
        if (value === undefined) {
            prefixes.some(function(prefix) {
                value = this.css(prefix + attribute.substr(0, 1).toUpperCase() + attribute.substr(1));
                return value !== undefined;
            }, this);
        }
        return value === undefined ? null : value;
    };

    NodeContainer.prototype.computedStyle = function(type) {
        return this.node.ownerDocument.defaultView.getComputedStyle(this.node, type);
    };

    NodeContainer.prototype.cssInt = function(attribute) {
        var value = parseInt(this.css(attribute), 10);
        return (isNaN(value)) ? 0 : value; // borders in old IE are throwing 'medium' for demo.html
    };

    NodeContainer.prototype.color = function(attribute) {
        return this.colors[attribute] || (this.colors[attribute] = new Color(this.css(attribute)));
    };

    NodeContainer.prototype.cssFloat = function(attribute) {
        var value = parseFloat(this.css(attribute));
        return (isNaN(value)) ? 0 : value;
    };

    NodeContainer.prototype.fontWeight = function() {
        var weight = this.css("fontWeight");
        switch(parseInt(weight, 10)){
        case 401:
            weight = "bold";
            break;
        case 400:
            weight = "normal";
            break;
        }
        return weight;
    };

    NodeContainer.prototype.parseClip = function() {
        var matches = this.css('clip').match(this.CLIP);
        if (matches) {
            return {
                top: parseInt(matches[1], 10),
                right: parseInt(matches[2], 10),
                bottom: parseInt(matches[3], 10),
                left: parseInt(matches[4], 10)
            };
        }
        return null;
    };

    NodeContainer.prototype.parseBackgroundImages = function() {
        return this.backgroundImages || (this.backgroundImages = parseBackgrounds(this.css("backgroundImage")));
    };

    NodeContainer.prototype.cssList = function(property, index) {
        var value = (this.css(property) || '').split(',');
        value = value[index || 0] || value[0] || 'auto';
        value = value.trim().split(' ');
        if (value.length === 1) {
            value = [value[0], value[0]];
        }
        return value;
    };

    NodeContainer.prototype.parseBackgroundSize = function(bounds, image, index) {
        var size = this.cssList("backgroundSize", index);
        var width, height;

        if (isPercentage(size[0])) {
            width = bounds.width * parseFloat(size[0]) / 100;
        } else if (/contain|cover/.test(size[0])) {
            var targetRatio = bounds.width / bounds.height, currentRatio = image.width / image.height;
            return (targetRatio < currentRatio ^ size[0] === 'contain') ?  {width: bounds.height * currentRatio, height: bounds.height} : {width: bounds.width, height: bounds.width / currentRatio};
        } else {
            width = parseInt(size[0], 10);
        }

        if (size[0] === 'auto' && size[1] === 'auto') {
            height = image.height;
        } else if (size[1] === 'auto') {
            height = width / image.width * image.height;
        } else if (isPercentage(size[1])) {
            height =  bounds.height * parseFloat(size[1]) / 100;
        } else {
            height = parseInt(size[1], 10);
        }

        if (size[0] === 'auto') {
            width = height / image.height * image.width;
        }

        return {width: width, height: height};
    };

    NodeContainer.prototype.parseBackgroundPosition = function(bounds, image, index, backgroundSize) {
        var position = this.cssList('backgroundPosition', index);
        var left, top;

        if (isPercentage(position[0])){
            left = (bounds.width - (backgroundSize || image).width) * (parseFloat(position[0]) / 100);
        } else {
            left = parseInt(position[0], 10);
        }

        if (position[1] === 'auto') {
            top = left / image.width * image.height;
        } else if (isPercentage(position[1])){
            top =  (bounds.height - (backgroundSize || image).height) * parseFloat(position[1]) / 100;
        } else {
            top = parseInt(position[1], 10);
        }

        if (position[0] === 'auto') {
            left = top / image.height * image.width;
        }

        return {left: left, top: top};
    };

    NodeContainer.prototype.parseBackgroundRepeat = function(index) {
        return this.cssList("backgroundRepeat", index)[0];
    };

    NodeContainer.prototype.parseTextShadows = function() {
        var textShadow = this.css("textShadow");
        var results = [];

        if (textShadow && textShadow !== 'none') {
            var shadows = textShadow.match(this.TEXT_SHADOW_PROPERTY);
            for (var i = 0; shadows && (i < shadows.length); i++) {
                var s = shadows[i].match(this.TEXT_SHADOW_VALUES);
                results.push({
                    color: new Color(s[0]),
                    offsetX: s[1] ? parseFloat(s[1].replace('px', '')) : 0,
                    offsetY: s[2] ? parseFloat(s[2].replace('px', '')) : 0,
                    blur: s[3] ? s[3].replace('px', '') : 0
                });
            }
        }
        return results;
    };

    NodeContainer.prototype.parseTransform = function() {
        if (!this.transformData) {
            if (this.hasTransform()) {
                var offset = this.parseBounds();
                var origin = this.prefixedCss("transformOrigin").split(" ").map(removePx).map(asFloat);
                origin[0] += offset.left;
                origin[1] += offset.top;
                this.transformData = {
                    origin: origin,
                    matrix: this.parseTransformMatrix()
                };
            } else {
                this.transformData = {
                    origin: [0, 0],
                    matrix: [1, 0, 0, 1, 0, 0]
                };
            }
        }
        return this.transformData;
    };

    NodeContainer.prototype.parseTransformMatrix = function() {
        if (!this.transformMatrix) {
            var transform = this.prefixedCss("transform");
            var matrix = transform ? parseMatrix(transform.match(this.MATRIX_PROPERTY)) : null;
            this.transformMatrix = matrix ? matrix : [1, 0, 0, 1, 0, 0];
        }
        return this.transformMatrix;
    };

    NodeContainer.prototype.parseBounds = function() {
        return this.bounds || (this.bounds = this.hasTransform() ? offsetBounds(this.node) : getBounds(this.node));
    };

    NodeContainer.prototype.hasTransform = function() {
        return this.parseTransformMatrix().join(",") !== "1,0,0,1,0,0" || (this.parent && this.parent.hasTransform());
    };

    NodeContainer.prototype.getValue = function() {
        var value = this.node.value || "";
        if (this.node.tagName === "SELECT") {
            value = selectionValue(this.node);
        } else if (this.node.type === "password") {
            value = Array(value.length + 1).join('\u2022'); // jshint ignore:line
        }
        return value.length === 0 ? (this.node.placeholder || "") : value;
    };

    NodeContainer.prototype.MATRIX_PROPERTY = /(matrix)\((.+)\)/;
    NodeContainer.prototype.TEXT_SHADOW_PROPERTY = /((rgba|rgb)\([^\)]+\)(\s-?\d+px){0,})/g;
    NodeContainer.prototype.TEXT_SHADOW_VALUES = /(-?\d+px)|(#.+)|(rgb\(.+\))|(rgba\(.+\))/g;
    NodeContainer.prototype.CLIP = /^rect\((\d+)px,? (\d+)px,? (\d+)px,? (\d+)px\)$/;

    function selectionValue(node) {
        var option = node.options[node.selectedIndex || 0];
        return option ? (option.text || "") : "";
    }

    function parseMatrix(match) {
        if (match && match[1] === "matrix") {
            return match[2].split(",").map(function(s) {
                return parseFloat(s.trim());
            });
        }
    }

    function isPercentage(value) {
        return value.toString().indexOf("%") !== -1;
    }

    function parseBackgrounds(backgroundImage) {
        var whitespace = ' \r\n\t',
            method, definition, prefix, prefix_i, block, results = [],
            mode = 0, numParen = 0, quote, args;
        var appendResult = function() {
            if(method) {
                if (definition.substr(0, 1) === '"') {
                    definition = definition.substr(1, definition.length - 2);
                }
                if (definition) {
                    args.push(definition);
                }
                if (method.substr(0, 1) === '-' && (prefix_i = method.indexOf('-', 1 ) + 1) > 0) {
                    prefix = method.substr(0, prefix_i);
                    method = method.substr(prefix_i);
                }
                results.push({
                    prefix: prefix,
                    method: method.toLowerCase(),
                    value: block,
                    args: args,
                    image: null
                });
            }
            args = [];
            method = prefix = definition = block = '';
        };
        args = [];
        method = prefix = definition = block = '';
        backgroundImage.split("").forEach(function(c) {
            if (mode === 0 && whitespace.indexOf(c) > -1) {
                return;
            }
            switch(c) {
            case '"':
                if(!quote) {
                    quote = c;
                } else if(quote === c) {
                    quote = null;
                }
                break;
            case '(':
                if(quote) {
                    break;
                } else if(mode === 0) {
                    mode = 1;
                    block += c;
                    return;
                } else {
                    numParen++;
                }
                break;
            case ')':
                if (quote) {
                    break;
                } else if(mode === 1) {
                    if(numParen === 0) {
                        mode = 0;
                        block += c;
                        appendResult();
                        return;
                    } else {
                        numParen--;
                    }
                }
                break;

            case ',':
                if (quote) {
                    break;
                } else if(mode === 0) {
                    appendResult();
                    return;
                } else if (mode === 1) {
                    if (numParen === 0 && !method.match(/^url$/i)) {
                        args.push(definition);
                        definition = '';
                        block += c;
                        return;
                    }
                }
                break;
            }

            block += c;
            if (mode === 0) {
                method += c;
            } else {
                definition += c;
            }
        });

        appendResult();
        return results;
    }

    function removePx(str) {
        return str.replace("px", "");
    }

    function asFloat(str) {
        return parseFloat(str);
    }

    function getBounds(node) {
        if (node.getBoundingClientRect) {
            var clientRect = node.getBoundingClientRect();
            var width = node.offsetWidth == null ? clientRect.width : node.offsetWidth;
            return {
                top: clientRect.top,
                bottom: clientRect.bottom || (clientRect.top + clientRect.height),
                right: clientRect.left + width,
                left: clientRect.left,
                width:  width,
                height: node.offsetHeight == null ? clientRect.height : node.offsetHeight
            };
        }
        return {};
    }

    function offsetBounds(node) {
        var parent = node.offsetParent ? offsetBounds(node.offsetParent) : {top: 0, left: 0};

        return {
            top: node.offsetTop + parent.top,
            bottom: node.offsetTop + node.offsetHeight + parent.top,
            right: node.offsetLeft + parent.left + node.offsetWidth,
            left: node.offsetLeft + parent.left,
            width: node.offsetWidth,
            height: node.offsetHeight
        };
    }

    function NodeParser(element, renderer, support, imageLoader, options) {
        log("Starting NodeParser");
        this.renderer = renderer;
        this.options = options;
        this.range = null;
        this.support = support;
        this.renderQueue = [];
        this.stack = new StackingContext(true, 1, element.ownerDocument, null);
        var parent = new NodeContainer(element, null);
        if (options.background) {
            renderer.rectangle(0, 0, renderer.width, renderer.height, new Color(options.background));
        }
        if (element === element.ownerDocument.documentElement) {
            // http://www.w3.org/TR/css3-background/#special-backgrounds
            var canvasBackground = new NodeContainer(parent.color('backgroundColor').isTransparent() ? element.ownerDocument.body : element.ownerDocument.documentElement, null);
            renderer.rectangle(0, 0, renderer.width, renderer.height, canvasBackground.color('backgroundColor'));
        }
        parent.visibile = parent.isElementVisible();
        this.createPseudoHideStyles(element.ownerDocument);
        this.disableAnimations(element.ownerDocument);
        this.nodes = flatten([parent].concat(this.getChildren(parent)).filter(function(container) {
            return container.visible = container.isElementVisible();
        }).map(this.getPseudoElements, this));
        this.fontMetrics = new FontMetrics();
        log("Fetched nodes, total:", this.nodes.length);
        log("Calculate overflow clips");
        this.calculateOverflowClips();
        log("Start fetching images");
        this.images = imageLoader.fetch(this.nodes.filter(isElement));
        this.ready = this.images.ready.then(bind(function() {
            log("Images loaded, starting parsing");
            log("Creating stacking contexts");
            this.createStackingContexts();
            log("Sorting stacking contexts");
            this.sortStackingContexts(this.stack);
            this.parse(this.stack);
            log("Render queue created with " + this.renderQueue.length + " items");
            return new Promise(bind(function(resolve) {
                if (!options.async) {
                    this.renderQueue.forEach(this.paint, this);
                    resolve();
                } else if (typeof(options.async) === "function") {
                    options.async.call(this, this.renderQueue, resolve);
                } else if (this.renderQueue.length > 0){
                    this.renderIndex = 0;
                    this.asyncRenderer(this.renderQueue, resolve);
                } else {
                    resolve();
                }
            }, this));
        }, this));
    }

    NodeParser.prototype.calculateOverflowClips = function() {
        this.nodes.forEach(function(container) {
            if (isElement(container)) {
                if (isPseudoElement(container)) {
                    container.appendToDOM();
                }
                container.borders = this.parseBorders(container);
                var clip = (container.css('overflow') === "hidden") ? [container.borders.clip] : [];
                var cssClip = container.parseClip();
                if (cssClip && ["absolute", "fixed"].indexOf(container.css('position')) !== -1) {
                    clip.push([["rect",
                        container.bounds.left + cssClip.left,
                        container.bounds.top + cssClip.top,
                        cssClip.right - cssClip.left,
                        cssClip.bottom - cssClip.top
                    ]]);
                }
                container.clip = hasParentClip(container) ? container.parent.clip.concat(clip) : clip;
                container.backgroundClip = (container.css('overflow') !== "hidden") ? container.clip.concat([container.borders.clip]) : container.clip;
                if (isPseudoElement(container)) {
                    container.cleanDOM();
                }
            } else if (isTextNode(container)) {
                container.clip = hasParentClip(container) ? container.parent.clip : [];
            }
            if (!isPseudoElement(container)) {
                container.bounds = null;
            }
        }, this);
    };

    function hasParentClip(container) {
        return container.parent && container.parent.clip.length;
    }

    NodeParser.prototype.asyncRenderer = function(queue, resolve, asyncTimer) {
        asyncTimer = asyncTimer || Date.now();
        this.paint(queue[this.renderIndex++]);
        if (queue.length === this.renderIndex) {
            resolve();
        } else if (asyncTimer + 20 > Date.now()) {
            this.asyncRenderer(queue, resolve, asyncTimer);
        } else {
            setTimeout(bind(function() {
                this.asyncRenderer(queue, resolve);
            }, this), 0);
        }
    };

    NodeParser.prototype.createPseudoHideStyles = function(document) {
        this.createStyles(document, '.' + PseudoElementContainer.prototype.PSEUDO_HIDE_ELEMENT_CLASS_BEFORE + ':before { content: "" !important; display: none !important; }' +
            '.' + PseudoElementContainer.prototype.PSEUDO_HIDE_ELEMENT_CLASS_AFTER + ':after { content: "" !important; display: none !important; }');
    };

    NodeParser.prototype.disableAnimations = function(document) {
        this.createStyles(document, '* { -webkit-animation: none !important; -moz-animation: none !important; -o-animation: none !important; animation: none !important; ' +
            '-webkit-transition: none !important; -moz-transition: none !important; -o-transition: none !important; transition: none !important;}');
    };

    NodeParser.prototype.createStyles = function(document, styles) {
        var hidePseudoElements = document.createElement('style');
        hidePseudoElements.innerHTML = styles;
        document.body.appendChild(hidePseudoElements);
    };

    NodeParser.prototype.getPseudoElements = function(container) {
        var nodes = [[container]];
        if (container.node.nodeType === Node.ELEMENT_NODE) {
            var before = this.getPseudoElement(container, ":before");
            var after = this.getPseudoElement(container, ":after");

            if (before) {
                nodes.push(before);
            }

            if (after) {
                nodes.push(after);
            }
        }
        return flatten(nodes);
    };

    function toCamelCase(str) {
        return str.replace(/(\-[a-z])/g, function(match){
            return match.toUpperCase().replace('-','');
        });
    }

    NodeParser.prototype.getPseudoElement = function(container, type) {
        var style = container.computedStyle(type);
        if(!style || !style.content || style.content === "none" || style.content === "-moz-alt-content" || style.display === "none") {
            return null;
        }

        var content = stripQuotes(style.content);
        var isImage = content.substr(0, 3) === 'url';
        var pseudoNode = document.createElement(isImage ? 'img' : 'html2canvaspseudoelement');
        var pseudoContainer = new PseudoElementContainer(pseudoNode, container, type);

        for (var i = style.length-1; i >= 0; i--) {
            var property = toCamelCase(style.item(i));
            pseudoNode.style[property] = style[property];
        }

        pseudoNode.className = PseudoElementContainer.prototype.PSEUDO_HIDE_ELEMENT_CLASS_BEFORE + " " + PseudoElementContainer.prototype.PSEUDO_HIDE_ELEMENT_CLASS_AFTER;

        if (isImage) {
            pseudoNode.src = parseBackgrounds(content)[0].args[0];
            return [pseudoContainer];
        } else {
            var text = document.createTextNode(content);
            pseudoNode.appendChild(text);
            return [pseudoContainer, new TextContainer(text, pseudoContainer)];
        }
    };


    NodeParser.prototype.getChildren = function(parentContainer) {
        return flatten([].filter.call(parentContainer.node.childNodes, renderableNode).map(function(node) {
            var container = [node.nodeType === Node.TEXT_NODE ? new TextContainer(node, parentContainer) : new NodeContainer(node, parentContainer)].filter(nonIgnoredElement);
            return node.nodeType === Node.ELEMENT_NODE && container.length && node.tagName !== "TEXTAREA" ? (container[0].isElementVisible() ? container.concat(this.getChildren(container[0])) : []) : container;
        }, this));
    };

    NodeParser.prototype.newStackingContext = function(container, hasOwnStacking) {
        var stack = new StackingContext(hasOwnStacking, container.getOpacity(), container.node, container.parent);
        container.cloneTo(stack);
        var parentStack = hasOwnStacking ? stack.getParentStack(this) : stack.parent.stack;
        parentStack.contexts.push(stack);
        container.stack = stack;
    };

    NodeParser.prototype.createStackingContexts = function() {
        this.nodes.forEach(function(container) {
            if (isElement(container) && (this.isRootElement(container) || hasOpacity(container) || isPositionedForStacking(container) || this.isBodyWithTransparentRoot(container) || container.hasTransform())) {
                this.newStackingContext(container, true);
            } else if (isElement(container) && ((isPositioned(container) && zIndex0(container)) || isInlineBlock(container) || isFloating(container))) {
                this.newStackingContext(container, false);
            } else {
                container.assignStack(container.parent.stack);
            }
        }, this);
    };

    NodeParser.prototype.isBodyWithTransparentRoot = function(container) {
        return container.node.nodeName === "BODY" && container.parent.color('backgroundColor').isTransparent();
    };

    NodeParser.prototype.isRootElement = function(container) {
        return container.parent === null;
    };

    NodeParser.prototype.sortStackingContexts = function(stack) {
        stack.contexts.sort(zIndexSort(stack.contexts.slice(0)));
        stack.contexts.forEach(this.sortStackingContexts, this);
    };

    NodeParser.prototype.parseTextBounds = function(container) {
        return function(text, index, textList) {
            if (container.parent.css("textDecoration").substr(0, 4) !== "none" || text.trim().length !== 0) {
                if (this.support.rangeBounds && !container.parent.hasTransform()) {
                    var offset = textList.slice(0, index).join("").length;
                    return this.getRangeBounds(container.node, offset, text.length);
                } else if (container.node && typeof(container.node.data) === "string") {
                    var replacementNode = container.node.splitText(text.length);
                    var bounds = this.getWrapperBounds(container.node, container.parent.hasTransform());
                    container.node = replacementNode;
                    return bounds;
                }
            } else if(!this.support.rangeBounds || container.parent.hasTransform()){
                container.node = container.node.splitText(text.length);
            }
            return {};
        };
    };

    NodeParser.prototype.getWrapperBounds = function(node, transform) {
        var wrapper = node.ownerDocument.createElement('html2canvaswrapper');
        var parent = node.parentNode,
            backupText = node.cloneNode(true);

        wrapper.appendChild(node.cloneNode(true));
        parent.replaceChild(wrapper, node);
        var bounds = transform ? offsetBounds(wrapper) : getBounds(wrapper);
        parent.replaceChild(backupText, wrapper);
        return bounds;
    };

    NodeParser.prototype.getRangeBounds = function(node, offset, length) {
        var range = this.range || (this.range = node.ownerDocument.createRange());
        range.setStart(node, offset);
        range.setEnd(node, offset + length);
        return range.getBoundingClientRect();
    };

    function ClearTransform() {}

    NodeParser.prototype.parse = function(stack) {
        // http://www.w3.org/TR/CSS21/visuren.html#z-index
        var negativeZindex = stack.contexts.filter(negativeZIndex); // 2. the child stacking contexts with negative stack levels (most negative first).
        var descendantElements = stack.children.filter(isElement);
        var descendantNonFloats = descendantElements.filter(not(isFloating));
        var nonInlineNonPositionedDescendants = descendantNonFloats.filter(not(isPositioned)).filter(not(inlineLevel)); // 3 the in-flow, non-inline-level, non-positioned descendants.
        var nonPositionedFloats = descendantElements.filter(not(isPositioned)).filter(isFloating); // 4. the non-positioned floats.
        var inFlow = descendantNonFloats.filter(not(isPositioned)).filter(inlineLevel); // 5. the in-flow, inline-level, non-positioned descendants, including inline tables and inline blocks.
        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.
        var text = stack.children.filter(isTextNode).filter(hasText);
        var positiveZindex = stack.contexts.filter(positiveZIndex); // 7. the child stacking contexts with positive stack levels (least positive first).
        negativeZindex.concat(nonInlineNonPositionedDescendants).concat(nonPositionedFloats)
            .concat(inFlow).concat(stackLevel0).concat(text).concat(positiveZindex).forEach(function(container) {
                this.renderQueue.push(container);
                if (isStackingContext(container)) {
                    this.parse(container);
                    this.renderQueue.push(new ClearTransform());
                }
            }, this);
    };

    NodeParser.prototype.paint = function(container) {
        try {
            if (container instanceof ClearTransform) {
                this.renderer.ctx.restore();
            } else if (isTextNode(container)) {
                if (isPseudoElement(container.parent)) {
                    container.parent.appendToDOM();
                }
                this.paintText(container);
                if (isPseudoElement(container.parent)) {
                    container.parent.cleanDOM();
                }
            } else {
                this.paintNode(container);
            }
        } catch(e) {
            log(e);
            if (this.options.strict) {
                throw e;
            }
        }
    };

    NodeParser.prototype.paintNode = function(container) {
        if (isStackingContext(container)) {
            this.renderer.setOpacity(container.opacity);
            this.renderer.ctx.save();
            if (container.hasTransform()) {
                this.renderer.setTransform(container.parseTransform());
            }
        }

        if (container.node.nodeName === "INPUT" && container.node.type === "checkbox") {
            this.paintCheckbox(container);
        } else if (container.node.nodeName === "INPUT" && container.node.type === "radio") {
            this.paintRadio(container);
        } else {
            this.paintElement(container);
        }
    };

    NodeParser.prototype.paintElement = function(container) {
        var bounds = container.parseBounds();
        this.renderer.clip(container.backgroundClip, function() {
            this.renderer.renderBackground(container, bounds, container.borders.borders.map(getWidth));
        }, this);

        this.renderer.clip(container.clip, function() {
            this.renderer.renderBorders(container.borders.borders);
        }, this);

        this.renderer.clip(container.backgroundClip, function() {
            switch (container.node.nodeName) {
            case "svg":
            case "IFRAME":
                var imgContainer = this.images.get(container.node);
                if (imgContainer) {
                    this.renderer.renderImage(container, bounds, container.borders, imgContainer);
                } else {
                    log("Error loading <" + container.node.nodeName + ">", container.node);
                }
                break;
            case "IMG":
                var imageContainer = this.images.get(container.node.src);
                if (imageContainer) {
                    this.renderer.renderImage(container, bounds, container.borders, imageContainer);
                } else {
                    log("Error loading <img>", container.node.src);
                }
                break;
            case "CANVAS":
                this.renderer.renderImage(container, bounds, container.borders, {image: container.node});
                break;
            case "SELECT":
            case "INPUT":
            case "TEXTAREA":
                this.paintFormValue(container);
                break;
            }
        }, this);
    };

    NodeParser.prototype.paintCheckbox = function(container) {
        var b = container.parseBounds();

        var size = Math.min(b.width, b.height);
        var bounds = {width: size - 1, height: size - 1, top: b.top, left: b.left};
        var r = [3, 3];
        var radius = [r, r, r, r];
        var borders = [1,1,1,1].map(function(w) {
            return {color: new Color('#A5A5A5'), width: w};
        });

        var borderPoints = calculateCurvePoints(bounds, radius, borders);

        this.renderer.clip(container.backgroundClip, function() {
            this.renderer.rectangle(bounds.left + 1, bounds.top + 1, bounds.width - 2, bounds.height - 2, new Color("#DEDEDE"));
            this.renderer.renderBorders(calculateBorders(borders, bounds, borderPoints, radius));
            if (container.node.checked) {
                this.renderer.font(new Color('#424242'), 'normal', 'normal', 'bold', (size - 3) + "px", 'arial');
                this.renderer.text("\u2714", bounds.left + size / 6, bounds.top + size - 1);
            }
        }, this);
    };

    NodeParser.prototype.paintRadio = function(container) {
        var bounds = container.parseBounds();

        var size = Math.min(bounds.width, bounds.height) - 2;

        this.renderer.clip(container.backgroundClip, function() {
            this.renderer.circleStroke(bounds.left + 1, bounds.top + 1, size, new Color('#DEDEDE'), 1, new Color('#A5A5A5'));
            if (container.node.checked) {
                this.renderer.circle(Math.ceil(bounds.left + size / 4) + 1, Math.ceil(bounds.top + size / 4) + 1, Math.floor(size / 2), new Color('#424242'));
            }
        }, this);
    };

    NodeParser.prototype.paintFormValue = function(container) {
        var value = container.getValue();
        if (value.length > 0) {
            var document = container.node.ownerDocument;
            var wrapper = document.createElement('html2canvaswrapper');
            var properties = ['lineHeight', 'textAlign', 'fontFamily', 'fontWeight', 'fontSize', 'color',
                'paddingLeft', 'paddingTop', 'paddingRight', 'paddingBottom',
                'width', 'height', 'borderLeftStyle', 'borderTopStyle', 'borderLeftWidth', 'borderTopWidth',
                'boxSizing', 'whiteSpace', 'wordWrap'];

            properties.forEach(function(property) {
                try {
                    wrapper.style[property] = container.css(property);
                } catch(e) {
                    // Older IE has issues with "border"
                    log("html2canvas: Parse: Exception caught in renderFormValue: " + e.message);
                }
            });
            var bounds = container.parseBounds();
            wrapper.style.position = "fixed";
            wrapper.style.left = bounds.left + "px";
            wrapper.style.top = bounds.top + "px";
            wrapper.textContent = value;
            document.body.appendChild(wrapper);
            this.paintText(new TextContainer(wrapper.firstChild, container));
            document.body.removeChild(wrapper);
        }
    };

    NodeParser.prototype.paintText = function(container) {
        container.applyTextTransform();
        var characters = window.html2canvas.punycode.ucs2.decode(container.node.data);
        var textList = (!this.options.letterRendering || noLetterSpacing(container)) && !hasUnicode(container.node.data) ? getWords(characters) : characters.map(function(character) {
            return window.html2canvas.punycode.ucs2.encode([character]);
        });

        var weight = container.parent.fontWeight();
        var size = container.parent.css('fontSize');
        var family = container.parent.css('fontFamily');
        var shadows = container.parent.parseTextShadows();

        this.renderer.font(container.parent.color('color'), container.parent.css('fontStyle'), container.parent.css('fontVariant'), weight, size, family);
        if (shadows.length) {
            // TODO: support multiple text shadows
            this.renderer.fontShadow(shadows[0].color, shadows[0].offsetX, shadows[0].offsetY, shadows[0].blur);
        } else {
            this.renderer.clearShadow();
        }

        this.renderer.clip(container.parent.clip, function() {
            textList.map(this.parseTextBounds(container), this).forEach(function(bounds, index) {
                if (bounds) {
                    this.renderer.text(textList[index], bounds.left, bounds.bottom);
                    this.renderTextDecoration(container.parent, bounds, this.fontMetrics.getMetrics(family, size));
                }
            }, this);
        }, this);
    };

    NodeParser.prototype.renderTextDecoration = function(container, bounds, metrics) {
        switch(container.css("textDecoration").split(" ")[0]) {
        case "underline":
            // Draws a line at the baseline of the font
            // TODO As some browsers display the line as more than 1px if the font-size is big, need to take that into account both in position and size
            this.renderer.rectangle(bounds.left, Math.round(bounds.top + metrics.baseline + metrics.lineWidth), bounds.width, 1, container.color("color"));
            break;
        case "overline":
            this.renderer.rectangle(bounds.left, Math.round(bounds.top), bounds.width, 1, container.color("color"));
            break;
        case "line-through":
            // TODO try and find exact position for line-through
            this.renderer.rectangle(bounds.left, Math.ceil(bounds.top + metrics.middle + metrics.lineWidth), bounds.width, 1, container.color("color"));
            break;
        }
    };

    var borderColorTransforms = {
        inset: [
            ["darken", 0.60],
            ["darken", 0.10],
            ["darken", 0.10],
            ["darken", 0.60]
        ]
    };

    NodeParser.prototype.parseBorders = function(container) {
        var nodeBounds = container.parseBounds();
        var radius = getBorderRadiusData(container);
        var borders = ["Top", "Right", "Bottom", "Left"].map(function(side, index) {
            var style = container.css('border' + side + 'Style');
            var color = container.color('border' + side + 'Color');
            if (style === "inset" && color.isBlack()) {
                color = new Color([255, 255, 255, color.a]); // this is wrong, but
            }
            var colorTransform = borderColorTransforms[style] ? borderColorTransforms[style][index] : null;
            return {
                width: container.cssInt('border' + side + 'Width'),
                color: colorTransform ? color[colorTransform[0]](colorTransform[1]) : color,
                args: null
            };
        });
        var borderPoints = calculateCurvePoints(nodeBounds, radius, borders);

        return {
            clip: this.parseBackgroundClip(container, borderPoints, borders, radius, nodeBounds),
            borders: calculateBorders(borders, nodeBounds, borderPoints, radius)
        };
    };

    function calculateBorders(borders, nodeBounds, borderPoints, radius) {
        return borders.map(function(border, borderSide) {
            if (border.width > 0) {
                var bx = nodeBounds.left;
                var by = nodeBounds.top;
                var bw = nodeBounds.width;
                var bh = nodeBounds.height - (borders[2].width);

                switch(borderSide) {
                case 0:
                    // top border
                    bh = borders[0].width;
                    border.args = drawSide({
                            c1: [bx, by],
                            c2: [bx + bw, by],
                            c3: [bx + bw - borders[1].width, by + bh],
                            c4: [bx + borders[3].width, by + bh]
                        }, radius[0], radius[1],
                        borderPoints.topLeftOuter, borderPoints.topLeftInner, borderPoints.topRightOuter, borderPoints.topRightInner);
                    break;
                case 1:
                    // right border
                    bx = nodeBounds.left + nodeBounds.width - (borders[1].width);
                    bw = borders[1].width;

                    border.args = drawSide({
                            c1: [bx + bw, by],
                            c2: [bx + bw, by + bh + borders[2].width],
                            c3: [bx, by + bh],
                            c4: [bx, by + borders[0].width]
                        }, radius[1], radius[2],
                        borderPoints.topRightOuter, borderPoints.topRightInner, borderPoints.bottomRightOuter, borderPoints.bottomRightInner);
                    break;
                case 2:
                    // bottom border
                    by = (by + nodeBounds.height) - (borders[2].width);
                    bh = borders[2].width;
                    border.args = drawSide({
                            c1: [bx + bw, by + bh],
                            c2: [bx, by + bh],
                            c3: [bx + borders[3].width, by],
                            c4: [bx + bw - borders[3].width, by]
                        }, radius[2], radius[3],
                        borderPoints.bottomRightOuter, borderPoints.bottomRightInner, borderPoints.bottomLeftOuter, borderPoints.bottomLeftInner);
                    break;
                case 3:
                    // left border
                    bw = borders[3].width;
                    border.args = drawSide({
                            c1: [bx, by + bh + borders[2].width],
                            c2: [bx, by],
                            c3: [bx + bw, by + borders[0].width],
                            c4: [bx + bw, by + bh]
                        }, radius[3], radius[0],
                        borderPoints.bottomLeftOuter, borderPoints.bottomLeftInner, borderPoints.topLeftOuter, borderPoints.topLeftInner);
                    break;
                }
            }
            return border;
        });
    }

    NodeParser.prototype.parseBackgroundClip = function(container, borderPoints, borders, radius, bounds) {
        var backgroundClip = container.css('backgroundClip'),
            borderArgs = [];

        switch(backgroundClip) {
        case "content-box":
        case "padding-box":
            parseCorner(borderArgs, radius[0], radius[1], borderPoints.topLeftInner, borderPoints.topRightInner, bounds.left + borders[3].width, bounds.top + borders[0].width);
            parseCorner(borderArgs, radius[1], radius[2], borderPoints.topRightInner, borderPoints.bottomRightInner, bounds.left + bounds.width - borders[1].width, bounds.top + borders[0].width);
            parseCorner(borderArgs, radius[2], radius[3], borderPoints.bottomRightInner, borderPoints.bottomLeftInner, bounds.left + bounds.width - borders[1].width, bounds.top + bounds.height - borders[2].width);
            parseCorner(borderArgs, radius[3], radius[0], borderPoints.bottomLeftInner, borderPoints.topLeftInner, bounds.left + borders[3].width, bounds.top + bounds.height - borders[2].width);
            break;

        default:
            parseCorner(borderArgs, radius[0], radius[1], borderPoints.topLeftOuter, borderPoints.topRightOuter, bounds.left, bounds.top);
            parseCorner(borderArgs, radius[1], radius[2], borderPoints.topRightOuter, borderPoints.bottomRightOuter, bounds.left + bounds.width, bounds.top);
            parseCorner(borderArgs, radius[2], radius[3], borderPoints.bottomRightOuter, borderPoints.bottomLeftOuter, bounds.left + bounds.width, bounds.top + bounds.height);
            parseCorner(borderArgs, radius[3], radius[0], borderPoints.bottomLeftOuter, borderPoints.topLeftOuter, bounds.left, bounds.top + bounds.height);
            break;
        }

        return borderArgs;
    };

    function getCurvePoints(x, y, r1, r2) {
        var kappa = 4 * ((Math.sqrt(2) - 1) / 3);
        var ox = (r1) * kappa, // control point offset horizontal
            oy = (r2) * kappa, // control point offset vertical
            xm = x + r1, // x-middle
            ym = y + r2; // y-middle
        return {
            topLeft: bezierCurve({x: x, y: ym}, {x: x, y: ym - oy}, {x: xm - ox, y: y}, {x: xm, y: y}),
            topRight: bezierCurve({x: x, y: y}, {x: x + ox,y: y}, {x: xm, y: ym - oy}, {x: xm, y: ym}),
            bottomRight: bezierCurve({x: xm, y: y}, {x: xm, y: y + oy}, {x: x + ox, y: ym}, {x: x, y: ym}),
            bottomLeft: bezierCurve({x: xm, y: ym}, {x: xm - ox, y: ym}, {x: x, y: y + oy}, {x: x, y:y})
        };
    }

    function calculateCurvePoints(bounds, borderRadius, borders) {
        var x = bounds.left,
            y = bounds.top,
            width = bounds.width,
            height = bounds.height,

            tlh = borderRadius[0][0],
            tlv = borderRadius[0][1],
            trh = borderRadius[1][0],
            trv = borderRadius[1][1],
            brh = borderRadius[2][0],
            brv = borderRadius[2][1],
            blh = borderRadius[3][0],
            blv = borderRadius[3][1];

        var topWidth = width - trh,
            rightHeight = height - brv,
            bottomWidth = width - brh,
            leftHeight = height - blv;

        return {
            topLeftOuter: getCurvePoints(x, y, tlh, tlv).topLeft.subdivide(0.5),
            topLeftInner: getCurvePoints(x + borders[3].width, y + borders[0].width, Math.max(0, tlh - borders[3].width), Math.max(0, tlv - borders[0].width)).topLeft.subdivide(0.5),
            topRightOuter: getCurvePoints(x + topWidth, y, trh, trv).topRight.subdivide(0.5),
            topRightInner: getCurvePoints(x + Math.min(topWidth, width + borders[3].width), y + borders[0].width, (topWidth > width + borders[3].width) ? 0 :trh - borders[3].width, trv - borders[0].width).topRight.subdivide(0.5),
            bottomRightOuter: getCurvePoints(x + bottomWidth, y + rightHeight, brh, brv).bottomRight.subdivide(0.5),
            bottomRightInner: getCurvePoints(x + Math.min(bottomWidth, width - borders[3].width), y + Math.min(rightHeight, height + borders[0].width), Math.max(0, brh - borders[1].width),  brv - borders[2].width).bottomRight.subdivide(0.5),
            bottomLeftOuter: getCurvePoints(x, y + leftHeight, blh, blv).bottomLeft.subdivide(0.5),
            bottomLeftInner: getCurvePoints(x + borders[3].width, y + leftHeight, Math.max(0, blh - borders[3].width), blv - borders[2].width).bottomLeft.subdivide(0.5)
        };
    }

    function bezierCurve(start, startControl, endControl, end) {
        var lerp = function (a, b, t) {
            return {
                x: a.x + (b.x - a.x) * t,
                y: a.y + (b.y - a.y) * t
            };
        };

        return {
            start: start,
            startControl: startControl,
            endControl: endControl,
            end: end,
            subdivide: function(t) {
                var ab = lerp(start, startControl, t),
                    bc = lerp(startControl, endControl, t),
                    cd = lerp(endControl, end, t),
                    abbc = lerp(ab, bc, t),
                    bccd = lerp(bc, cd, t),
                    dest = lerp(abbc, bccd, t);
                return [bezierCurve(start, ab, abbc, dest), bezierCurve(dest, bccd, cd, end)];
            },
            curveTo: function(borderArgs) {
                borderArgs.push(["bezierCurve", startControl.x, startControl.y, endControl.x, endControl.y, end.x, end.y]);
            },
            curveToReversed: function(borderArgs) {
                borderArgs.push(["bezierCurve", endControl.x, endControl.y, startControl.x, startControl.y, start.x, start.y]);
            }
        };
    }

    function drawSide(borderData, radius1, radius2, outer1, inner1, outer2, inner2) {
        var borderArgs = [];

        if (radius1[0] > 0 || radius1[1] > 0) {
            borderArgs.push(["line", outer1[1].start.x, outer1[1].start.y]);
            outer1[1].curveTo(borderArgs);
        } else {
            borderArgs.push([ "line", borderData.c1[0], borderData.c1[1]]);
        }

        if (radius2[0] > 0 || radius2[1] > 0) {
            borderArgs.push(["line", outer2[0].start.x, outer2[0].start.y]);
            outer2[0].curveTo(borderArgs);
            borderArgs.push(["line", inner2[0].end.x, inner2[0].end.y]);
            inner2[0].curveToReversed(borderArgs);
        } else {
            borderArgs.push(["line", borderData.c2[0], borderData.c2[1]]);
            borderArgs.push(["line", borderData.c3[0], borderData.c3[1]]);
        }

        if (radius1[0] > 0 || radius1[1] > 0) {
            borderArgs.push(["line", inner1[1].end.x, inner1[1].end.y]);
            inner1[1].curveToReversed(borderArgs);
        } else {
            borderArgs.push(["line", borderData.c4[0], borderData.c4[1]]);
        }

        return borderArgs;
    }

    function parseCorner(borderArgs, radius1, radius2, corner1, corner2, x, y) {
        if (radius1[0] > 0 || radius1[1] > 0) {
            borderArgs.push(["line", corner1[0].start.x, corner1[0].start.y]);
            corner1[0].curveTo(borderArgs);
            corner1[1].curveTo(borderArgs);
        } else {
            borderArgs.push(["line", x, y]);
        }

        if (radius2[0] > 0 || radius2[1] > 0) {
            borderArgs.push(["line", corner2[0].start.x, corner2[0].start.y]);
        }
    }

    function negativeZIndex(container) {
        return container.cssInt("zIndex") < 0;
    }

    function positiveZIndex(container) {
        return container.cssInt("zIndex") > 0;
    }

    function zIndex0(container) {
        return container.cssInt("zIndex") === 0;
    }

    function inlineLevel(container) {
        return ["inline", "inline-block", "inline-table"].indexOf(container.css("display")) !== -1;
    }

    function isStackingContext(container) {
        return (container instanceof StackingContext);
    }

    function hasText(container) {
        return container.node.data.trim().length > 0;
    }

    function noLetterSpacing(container) {
        return (/^(normal|none|0px)$/.test(container.parent.css("letterSpacing")));
    }

    function getBorderRadiusData(container) {
        return ["TopLeft", "TopRight", "BottomRight", "BottomLeft"].map(function(side) {
            var value = container.css('border' + side + 'Radius');
            var arr = value.split(" ");
            if (arr.length <= 1) {
                arr[1] = arr[0];
            }
            return arr.map(asInt);
        });
    }

    function renderableNode(node) {
        return (node.nodeType === Node.TEXT_NODE || node.nodeType === Node.ELEMENT_NODE);
    }

    function isPositionedForStacking(container) {
        var position = container.css("position");
        var zIndex = (["absolute", "relative", "fixed"].indexOf(position) !== -1) ? container.css("zIndex") : "auto";
        return zIndex !== "auto";
    }

    function isPositioned(container) {
        return container.css("position") !== "static";
    }

    function isFloating(container) {
        return container.css("float") !== "none";
    }

    function isInlineBlock(container) {
        return ["inline-block", "inline-table"].indexOf(container.css("display")) !== -1;
    }

    function not(callback) {
        var context = this;
        return function() {
            return !callback.apply(context, arguments);
        };
    }

    function isElement(container) {
        return container.node.nodeType === Node.ELEMENT_NODE;
    }

    function isPseudoElement(container) {
        return container.isPseudoElement === true;
    }

    function isTextNode(container) {
        return container.node.nodeType === Node.TEXT_NODE;
    }

    function zIndexSort(contexts) {
        return function(a, b) {
            return (a.cssInt("zIndex") + (contexts.indexOf(a) / contexts.length)) - (b.cssInt("zIndex") + (contexts.indexOf(b) / contexts.length));
        };
    }

    function hasOpacity(container) {
        return container.getOpacity() < 1;
    }

    function bind(callback, context) {
        return function() {
            return callback.apply(context, arguments);
        };
    }

    function asInt(value) {
        return parseInt(value, 10);
    }

    function getWidth(border) {
        return border.width;
    }

    function nonIgnoredElement(nodeContainer) {
        return (nodeContainer.node.nodeType !== Node.ELEMENT_NODE || ["SCRIPT", "HEAD", "TITLE", "OBJECT", "BR", "OPTION"].indexOf(nodeContainer.node.nodeName) === -1);
    }

    function flatten(arrays) {
        return [].concat.apply([], arrays);
    }

    function stripQuotes(content) {
        var first = content.substr(0, 1);
        return (first === content.substr(content.length - 1) && first.match(/'|"/)) ? content.substr(1, content.length - 2) : content;
    }

    function getWords(characters) {
        var words = [], i = 0, onWordBoundary = false, word;
        while(characters.length) {
            if (isWordBoundary(characters[i]) === onWordBoundary) {
                word = characters.splice(0, i);
                if (word.length) {
                    words.push(window.html2canvas.punycode.ucs2.encode(word));
                }
                onWordBoundary =! onWordBoundary;
                i = 0;
            } else {
                i++;
            }

            if (i >= characters.length) {
                word = characters.splice(0, i);
                if (word.length) {
                    words.push(window.html2canvas.punycode.ucs2.encode(word));
                }
            }
        }
        return words;
    }

    function isWordBoundary(characterCode) {
        return [
            32, // <space>
            13, // \r
            10, // \n
            9, // \t
            45 // -
        ].indexOf(characterCode) !== -1;
    }

    function hasUnicode(string) {
        return (/[^\u0000-\u00ff]/).test(string);
    }

    function Proxy(src, proxyUrl, document) {
        if (!proxyUrl) {
            return Promise.reject("No proxy configured");
        }
        var callback = createCallback(supportsCORS);
        var url = createProxyUrl(proxyUrl, src, callback);

        return supportsCORS ? XHR(url) : (jsonp(document, url, callback).then(function(response) {
            return decode64(response.content);
        }));
    }
    var proxyCount = 0;

    var supportsCORS = ('withCredentials' in new XMLHttpRequest());
    var supportsCORSImage = ('crossOrigin' in new Image());

    function ProxyURL(src, proxyUrl, document) {
        var callback = createCallback(supportsCORSImage);
        var url = createProxyUrl(proxyUrl, src, callback);
        return (supportsCORSImage ? Promise.resolve(url) : jsonp(document, url, callback).then(function(response) {
            return "data:" + response.type + ";base64," + response.content;
        }));
    }

    function jsonp(document, url, callback) {
        return new Promise(function(resolve, reject) {
            var s = document.createElement("script");
            var cleanup = function() {
                delete window.html2canvas.proxy[callback];
                document.body.removeChild(s);
            };
            window.html2canvas.proxy[callback] = function(response) {
                cleanup();
                resolve(response);
            };
            s.src = url;
            s.onerror = function(e) {
                cleanup();
                reject(e);
            };
            document.body.appendChild(s);
        });
    }

    function createCallback(useCORS) {
        return !useCORS ? "html2canvas_" + Date.now() + "_" + (++proxyCount) + "_" + Math.round(Math.random() * 100000) : "";
    }

    function createProxyUrl(proxyUrl, src, callback) {
        return proxyUrl + "?url=" + encodeURIComponent(src) + (callback.length ? "&callback=html2canvas.proxy." + callback : "");
    }

    function ProxyImageContainer(src, proxy) {
        var script = document.createElement("script");
        var link = document.createElement("a");
        link.href = src;
        src = link.href;
        this.src = src;
        this.image = new Image();
        var self = this;
        this.promise = new Promise(function(resolve, reject) {
            self.image.crossOrigin = "Anonymous";
            self.image.onload = resolve;
            self.image.onerror = reject;

            new ProxyURL(src, proxy, document).then(function(url) {
                self.image.src = url;
            })['catch'](reject);
        });
    }

    function PseudoElementContainer(node, parent, type) {
        NodeContainer.call(this, node, parent);
        this.isPseudoElement = true;
        this.before = type === ":before";
    }

    PseudoElementContainer.prototype.cloneTo = function(stack) {
        PseudoElementContainer.prototype.cloneTo.call(this, stack);
        stack.isPseudoElement = true;
        stack.before = this.before;
    };

    PseudoElementContainer.prototype = Object.create(NodeContainer.prototype);

    PseudoElementContainer.prototype.appendToDOM = function() {
        if (this.before) {
            this.parent.node.insertBefore(this.node, this.parent.node.firstChild);
        } else {
            this.parent.node.appendChild(this.node);
        }
        this.parent.node.className += " " + this.getHideClass();
    };

    PseudoElementContainer.prototype.cleanDOM = function() {
        this.node.parentNode.removeChild(this.node);
        this.parent.node.className = this.parent.node.className.replace(this.getHideClass(), "");
    };

    PseudoElementContainer.prototype.getHideClass = function() {
        return this["PSEUDO_HIDE_ELEMENT_CLASS_" + (this.before ? "BEFORE" : "AFTER")];
    };

    PseudoElementContainer.prototype.PSEUDO_HIDE_ELEMENT_CLASS_BEFORE = "___html2canvas___pseudoelement_before";
    PseudoElementContainer.prototype.PSEUDO_HIDE_ELEMENT_CLASS_AFTER = "___html2canvas___pseudoelement_after";

    function Renderer(width, height, images, options, document) {
        this.width = width;
        this.height = height;
        this.images = images;
        this.options = options;
        this.document = document;
    }

    Renderer.prototype.renderImage = function(container, bounds, borderData, imageContainer) {
        var paddingLeft = container.cssInt('paddingLeft'),
            paddingTop = container.cssInt('paddingTop'),
            paddingRight = container.cssInt('paddingRight'),
            paddingBottom = container.cssInt('paddingBottom'),
            borders = borderData.borders;

        var width = bounds.width - (borders[1].width + borders[3].width + paddingLeft + paddingRight);
        var height = bounds.height - (borders[0].width + borders[2].width + paddingTop + paddingBottom);
        this.drawImage(
            imageContainer,
            0,
            0,
            imageContainer.image.width || width,
            imageContainer.image.height || height,
            bounds.left + paddingLeft + borders[3].width,
            bounds.top + paddingTop + borders[0].width,
            width,
            height
        );
    };

    Renderer.prototype.renderBackground = function(container, bounds, borderData) {
        if (bounds.height > 0 && bounds.width > 0) {
            this.renderBackgroundColor(container, bounds);
            this.renderBackgroundImage(container, bounds, borderData);
        }
    };

    Renderer.prototype.renderBackgroundColor = function(container, bounds) {
        var color = container.color("backgroundColor");
        if (!color.isTransparent()) {
            this.rectangle(bounds.left, bounds.top, bounds.width, bounds.height, color);
        }
    };

    Renderer.prototype.renderBorders = function(borders) {
        borders.forEach(this.renderBorder, this);
    };

    Renderer.prototype.renderBorder = function(data) {
        if (!data.color.isTransparent() && data.args !== null) {
            this.drawShape(data.args, data.color);
        }
    };

    Renderer.prototype.renderBackgroundImage = function(container, bounds, borderData) {
        var backgroundImages = container.parseBackgroundImages();
        backgroundImages.reverse().forEach(function(backgroundImage, index, arr) {
            switch(backgroundImage.method) {
            case "url":
                var image = this.images.get(backgroundImage.args[0]);
                if (image) {
                    this.renderBackgroundRepeating(container, bounds, image, arr.length - (index+1), borderData);
                } else {
                    log("Error loading background-image", backgroundImage.args[0]);
                }
                break;
            case "linear-gradient":
            case "gradient":
                var gradientImage = this.images.get(backgroundImage.value);
                if (gradientImage) {
                    this.renderBackgroundGradient(gradientImage, bounds, borderData);
                } else {
                    log("Error loading background-image", backgroundImage.args[0]);
                }
                break;
            case "none":
                break;
            default:
                log("Unknown background-image type", backgroundImage.args[0]);
            }
        }, this);
    };

    Renderer.prototype.renderBackgroundRepeating = function(container, bounds, imageContainer, index, borderData) {
        var size = container.parseBackgroundSize(bounds, imageContainer.image, index);
        var position = container.parseBackgroundPosition(bounds, imageContainer.image, index, size);
        var repeat = container.parseBackgroundRepeat(index);
        switch (repeat) {
        case "repeat-x":
        case "repeat no-repeat":
            this.backgroundRepeatShape(imageContainer, position, size, bounds, bounds.left + borderData[3], bounds.top + position.top + borderData[0], 99999, size.height, borderData);
            break;
        case "repeat-y":
        case "no-repeat repeat":
            this.backgroundRepeatShape(imageContainer, position, size, bounds, bounds.left + position.left + borderData[3], bounds.top + borderData[0], size.width, 99999, borderData);
            break;
        case "no-repeat":
            this.backgroundRepeatShape(imageContainer, position, size, bounds, bounds.left + position.left + borderData[3], bounds.top + position.top + borderData[0], size.width, size.height, borderData);
            break;
        default:
            this.renderBackgroundRepeat(imageContainer, position, size, {top: bounds.top, left: bounds.left}, borderData[3], borderData[0]);
            break;
        }
    };

    function StackingContext(hasOwnStacking, opacity, element, parent) {
        NodeContainer.call(this, element, parent);
        this.ownStacking = hasOwnStacking;
        this.contexts = [];
        this.children = [];
        this.opacity = (this.parent ? this.parent.stack.opacity : 1) * opacity;
    }

    StackingContext.prototype = Object.create(NodeContainer.prototype);

    StackingContext.prototype.getParentStack = function(context) {
        var parentStack = (this.parent) ? this.parent.stack : null;
        return parentStack ? (parentStack.ownStacking ? parentStack : parentStack.getParentStack(context)) : context.stack;
    };

    function Support(document) {
        this.rangeBounds = this.testRangeBounds(document);
        this.cors = this.testCORS();
        this.svg = this.testSVG();
    }

    Support.prototype.testRangeBounds = function(document) {
        var range, testElement, rangeBounds, rangeHeight, support = false;

        if (document.createRange) {
            range = document.createRange();
            if (range.getBoundingClientRect) {
                testElement = document.createElement('boundtest');
                testElement.style.height = "123px";
                testElement.style.display = "block";
                document.body.appendChild(testElement);

                range.selectNode(testElement);
                rangeBounds = range.getBoundingClientRect();
                rangeHeight = rangeBounds.height;

                if (rangeHeight === 123) {
                    support = true;
                }
                document.body.removeChild(testElement);
            }
        }

        return support;
    };

    Support.prototype.testCORS = function() {
        return typeof((new Image()).crossOrigin) !== "undefined";
    };

    Support.prototype.testSVG = function() {
        var img = new Image();
        var canvas = document.createElement("canvas");
        var ctx =  canvas.getContext("2d");
        img.src = "data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg'></svg>";

        try {
            ctx.drawImage(img, 0, 0);
            canvas.toDataURL();
        } catch(e) {
            return false;
        }
        return true;
    };

    function SVGContainer(src) {
        this.src = src;
        this.image = null;
        var self = this;

        this.promise = this.hasFabric().then(function() {
            return (self.isInline(src) ? Promise.resolve(self.inlineFormatting(src)) : XHR(src));
        }).then(function(svg) {
            return new Promise(function(resolve) {
                html2canvas.fabric.loadSVGFromString(svg, self.createCanvas.call(self, resolve));
            });
        });
    }

    SVGContainer.prototype.hasFabric = function() {
        return !html2canvas.fabric ? Promise.reject(new Error("html2canvas.svg.js is not loaded, cannot render svg")) : Promise.resolve();
    };

    SVGContainer.prototype.inlineFormatting = function(src) {
        return (/^data:image\/svg\+xml;base64,/.test(src)) ? this.decode64(this.removeContentType(src)) : this.removeContentType(src);
    };

    SVGContainer.prototype.removeContentType = function(src) {
        return src.replace(/^data:image\/svg\+xml(;base64)?,/,'');
    };

    SVGContainer.prototype.isInline = function(src) {
        return (/^data:image\/svg\+xml/i.test(src));
    };

    SVGContainer.prototype.createCanvas = function(resolve) {
        var self = this;
        return function (objects, options) {
            var canvas = new html2canvas.fabric.StaticCanvas('c');
            self.image = canvas.lowerCanvasEl;
            canvas
                .setWidth(options.width)
                .setHeight(options.height)
                .add(html2canvas.fabric.util.groupSVGElements(objects, options))
                .renderAll();
            resolve(canvas.lowerCanvasEl);
        };
    };

    SVGContainer.prototype.decode64 = function(str) {
        return (typeof(window.atob) === "function") ? window.atob(str) : decode64(str);
    };

/*
 * base64-arraybuffer
 * https://github.com/niklasvh/base64-arraybuffer
 *
 * Copyright (c) 2012 Niklas von Hertzen
 * Licensed under the MIT license.
 */

    function decode64(base64) {
        var chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
        var len = base64.length, i, encoded1, encoded2, encoded3, encoded4, byte1, byte2, byte3;

        var output = "";

        for (i = 0; i < len; i+=4) {
            encoded1 = chars.indexOf(base64[i]);
            encoded2 = chars.indexOf(base64[i+1]);
            encoded3 = chars.indexOf(base64[i+2]);
            encoded4 = chars.indexOf(base64[i+3]);

            byte1 = (encoded1 << 2) | (encoded2 >> 4);
            byte2 = ((encoded2 & 15) << 4) | (encoded3 >> 2);
            byte3 = ((encoded3 & 3) << 6) | encoded4;
            if (encoded3 === 64) {
                output += String.fromCharCode(byte1);
            } else if (encoded4 === 64 || encoded4 === -1) {
                output += String.fromCharCode(byte1, byte2);
            } else{
                output += String.fromCharCode(byte1, byte2, byte3);
            }
        }

        return output;
    }

    function SVGNodeContainer(node, native) {
        this.src = node;
        this.image = null;
        var self = this;

        this.promise = native ? new Promise(function(resolve, reject) {
            self.image = new Image();
            self.image.onload = resolve;
            self.image.onerror = reject;
            self.image.src = "data:image/svg+xml," + (new XMLSerializer()).serializeToString(node);
            if (self.image.complete === true) {
                resolve(self.image);
            }
        }) : this.hasFabric().then(function() {
            return new Promise(function(resolve) {
                html2canvas.fabric.parseSVGDocument(node, self.createCanvas.call(self, resolve));
            });
        });
    }

    SVGNodeContainer.prototype = Object.create(SVGContainer.prototype);

    function TextContainer(node, parent) {
        NodeContainer.call(this, node, parent);
    }

    TextContainer.prototype = Object.create(NodeContainer.prototype);

    TextContainer.prototype.applyTextTransform = function() {
        this.node.data = this.transform(this.parent.css("textTransform"));
    };

    TextContainer.prototype.transform = function(transform) {
        var text = this.node.data;
        switch(transform){
        case "lowercase":
            return text.toLowerCase();
        case "capitalize":
            return text.replace(/(^|\s|:|-|\(|\))([a-z])/g, capitalize);
        case "uppercase":
            return text.toUpperCase();
        default:
            return text;
        }
    };

    function capitalize(m, p1, p2) {
        if (m.length > 0) {
            return p1 + p2.toUpperCase();
        }
    }

    function WebkitGradientContainer(imageData) {
        GradientContainer.apply(this, arguments);
        this.type = (imageData.args[0] === "linear") ? this.TYPES.LINEAR : this.TYPES.RADIAL;
    }

    WebkitGradientContainer.prototype = Object.create(GradientContainer.prototype);

    function XHR(url) {
        return new Promise(function(resolve, reject) {
            var xhr = new XMLHttpRequest();
            xhr.open('GET', url);

            xhr.onload = function() {
                if (xhr.status === 200) {
                    resolve(xhr.responseText);
                } else {
                    reject(new Error(xhr.statusText));
                }
            };

            xhr.onerror = function() {
                reject(new Error("Network Error"));
            };

            xhr.send();
        });
    }

    function CanvasRenderer(width, height) {
        Renderer.apply(this, arguments);
        this.canvas = this.options.canvas || this.document.createElement("canvas");
        if (!this.options.canvas) {
            this.canvas.width = width;
            this.canvas.height = height;
        }
        this.ctx = this.canvas.getContext("2d");
        this.taintCtx = this.document.createElement("canvas").getContext("2d");
        this.ctx.textBaseline = "bottom";
        this.variables = {};
        log("Initialized CanvasRenderer with size", width, "x", height);
    }

    CanvasRenderer.prototype = Object.create(Renderer.prototype);

    CanvasRenderer.prototype.setFillStyle = function(fillStyle) {
        this.ctx.fillStyle = typeof(fillStyle) === "object" && !!fillStyle.isColor ? fillStyle.toString() : fillStyle;
        return this.ctx;
    };

    CanvasRenderer.prototype.rectangle = function(left, top, width, height, color) {
        this.setFillStyle(color).fillRect(left, top, width, height);
    };

    CanvasRenderer.prototype.circle = function(left, top, size, color) {
        this.setFillStyle(color);
        this.ctx.beginPath();
        this.ctx.arc(left + size / 2, top + size / 2, size / 2, 0, Math.PI*2, true);
        this.ctx.closePath();
        this.ctx.fill();
    };

    CanvasRenderer.prototype.circleStroke = function(left, top, size, color, stroke, strokeColor) {
        this.circle(left, top, size, color);
        this.ctx.strokeStyle = strokeColor.toString();
        this.ctx.stroke();
    };

    CanvasRenderer.prototype.drawShape = function(shape, color) {
        this.shape(shape);
        this.setFillStyle(color).fill();
    };

    CanvasRenderer.prototype.taints = function(imageContainer) {
        if (imageContainer.tainted === null) {
            this.taintCtx.drawImage(imageContainer.image, 0, 0);
            try {
                this.taintCtx.getImageData(0, 0, 1, 1);
                imageContainer.tainted = false;
            } catch(e) {
                this.taintCtx = document.createElement("canvas").getContext("2d");
                imageContainer.tainted = true;
            }
        }

        return imageContainer.tainted;
    };

    CanvasRenderer.prototype.drawImage = function(imageContainer, sx, sy, sw, sh, dx, dy, dw, dh) {
        if (!this.taints(imageContainer) || this.options.allowTaint) {
            this.ctx.drawImage(imageContainer.image, sx, sy, sw, sh, dx, dy, dw, dh);
        }
    };

    CanvasRenderer.prototype.clip = function(shapes, callback, context) {
        this.ctx.save();
        shapes.filter(hasEntries).forEach(function(shape) {
            this.shape(shape).clip();
        }, this);
        callback.call(context);
        this.ctx.restore();
    };

    CanvasRenderer.prototype.shape = function(shape) {
        this.ctx.beginPath();
        shape.forEach(function(point, index) {
            if (point[0] === "rect") {
                this.ctx.rect.apply(this.ctx, point.slice(1));
            } else {
                this.ctx[(index === 0) ? "moveTo" : point[0] + "To" ].apply(this.ctx, point.slice(1));
            }
        }, this);
        this.ctx.closePath();
        return this.ctx;
    };

    CanvasRenderer.prototype.font = function(color, style, variant, weight, size, family) {
        this.setFillStyle(color).font = [style, variant, weight, size, family].join(" ").split(",")[0];
    };

    CanvasRenderer.prototype.fontShadow = function(color, offsetX, offsetY, blur) {
        this.setVariable("shadowColor", color.toString())
            .setVariable("shadowOffsetY", offsetX)
            .setVariable("shadowOffsetX", offsetY)
            .setVariable("shadowBlur", blur);
    };

    CanvasRenderer.prototype.clearShadow = function() {
        this.setVariable("shadowColor", "rgba(0,0,0,0)");
    };

    CanvasRenderer.prototype.setOpacity = function(opacity) {
        this.ctx.globalAlpha = opacity;
    };

    CanvasRenderer.prototype.setTransform = function(transform) {
        this.ctx.translate(transform.origin[0], transform.origin[1]);
        this.ctx.transform.apply(this.ctx, transform.matrix);
        this.ctx.translate(-transform.origin[0], -transform.origin[1]);
    };

    CanvasRenderer.prototype.setVariable = function(property, value) {
        if (this.variables[property] !== value) {
            this.variables[property] = this.ctx[property] = value;
        }

        return this;
    };

    CanvasRenderer.prototype.text = function(text, left, bottom) {
        this.ctx.fillText(text, left, bottom);
    };

    CanvasRenderer.prototype.backgroundRepeatShape = function(imageContainer, backgroundPosition, size, bounds, left, top, width, height, borderData) {
        var shape = [
            ["line", Math.round(left), Math.round(top)],
            ["line", Math.round(left + width), Math.round(top)],
            ["line", Math.round(left + width), Math.round(height + top)],
            ["line", Math.round(left), Math.round(height + top)]
        ];
        this.clip([shape], function() {
            this.renderBackgroundRepeat(imageContainer, backgroundPosition, size, bounds, borderData[3], borderData[0]);
        }, this);
    };

    CanvasRenderer.prototype.renderBackgroundRepeat = function(imageContainer, backgroundPosition, size, bounds, borderLeft, borderTop) {
        var offsetX = Math.round(bounds.left + backgroundPosition.left + borderLeft), offsetY = Math.round(bounds.top + backgroundPosition.top + borderTop);
        this.setFillStyle(this.ctx.createPattern(this.resizeImage(imageContainer, size), "repeat"));
        this.ctx.translate(offsetX, offsetY);
        this.ctx.fill();
        this.ctx.translate(-offsetX, -offsetY);
    };

    CanvasRenderer.prototype.renderBackgroundGradient = function(gradientImage, bounds) {
        if (gradientImage instanceof LinearGradientContainer) {
            var gradient = this.ctx.createLinearGradient(
                bounds.left + bounds.width * gradientImage.x0,
                bounds.top + bounds.height * gradientImage.y0,
                bounds.left +  bounds.width * gradientImage.x1,
                bounds.top +  bounds.height * gradientImage.y1);
            gradientImage.colorStops.forEach(function(colorStop) {
                gradient.addColorStop(colorStop.stop, colorStop.color.toString());
            });
            this.rectangle(bounds.left, bounds.top, bounds.width, bounds.height, gradient);
        }
    };

    CanvasRenderer.prototype.resizeImage = function(imageContainer, size) {
        var image = imageContainer.image;
        if(image.width === size.width && image.height === size.height) {
            return image;
        }

        var ctx, canvas = document.createElement('canvas');
        canvas.width = size.width;
        canvas.height = size.height;
        ctx = canvas.getContext("2d");
        ctx.drawImage(image, 0, 0, image.width, image.height, 0, 0, size.width, size.height );
        return canvas;
    };

    function hasEntries(array) {
        return array.length > 0;
    }

}).call({}, typeof (window) !== "undefined" ? window : undefined, typeof (document) !== "undefined" ? document : undefined);

function onExecuted(result) {
  alert('We made it green');
}

function onError(error) {
  alert('Error: ${error}');
  console.log(error.stack);
}

var createCanvas = html2canvas(document.body, {
        onrendered: function(canvas) {
            var img = document.createElement('img');
            img.crossOrigin = "anonymous"; 
	        img.src = canvas.toDataURL("image/png");
			img.id = "injectedImg";             
            document.body.appendChild(img);
            alert("INSIDE");
        }
    });
createCanvas.then(onExecuted, onError);