jsPDF Tutorial to Export Colorful Bar Chart to PDF Document Using Chart.js Library in Browser Using Javascript Full Project For Beginners

 

Welcome folks today in this blog post we will be exporting colorful bar chart to pdf document using chart.js and jspdf library in browser using javascript. All the full source code of the application is shown below.

 

 

Get Started

 

 

In order to get started you need to make an index.html file and copy paste the following code

 

index.html

 

<canvas id="myChart" width="200" height="200"></canvas>
<button class="btn example1">Test on this page</button>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.1.4/Chart.bundle.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jspdf/1.2.61/jspdf.min.js"></script>
<script src="https://code.jquery.com/jquery-2.2.4.min.js"></script>

 

 

Now make a script.js file and copy paste the below code

 

script.js

 

/*
  html2canvas 0.5.0-alpha1 <https://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
 */

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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
a.Promise&&"reject"in a.Promise&&"all"in a.Promise&&"race"in a.Promise&&function(){var b;new a.Promise(function(a){b=a});return s(b)}()||(a.Promise=h)}};"function"===typeof define&&define.amd?define(function(){return z}):"undefined"!==typeof module&&module.exports?module.exports=z:"undefined"!==typeof this&&(this.ES6Promise=z);}).call(window);
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);


var ctx = document.getElementById("myChart");
var myChart = new Chart(ctx, {
    type: 'bar',
    data: {
        labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
        datasets: [{
            label: '# of Votes',
            data: [12, 19, 3, 5, 2, 3],
            backgroundColor: [
                'rgba(255, 99, 132, 0.2)',
                'rgba(54, 162, 235, 0.2)',
                'rgba(255, 206, 86, 0.2)',
                'rgba(75, 192, 192, 0.2)',
                'rgba(153, 102, 255, 0.2)',
                'rgba(255, 159, 64, 0.2)'
            ],
            borderColor: [
                'rgba(255,99,132,1)',
                'rgba(54, 162, 235, 1)',
                'rgba(255, 206, 86, 1)',
                'rgba(75, 192, 192, 1)',
                'rgba(153, 102, 255, 1)',
                'rgba(255, 159, 64, 1)'
            ],
            borderWidth: 1
        }]
    },
    options: {
        scales: {
            yAxes: [{
                ticks: {
                    beginAtZero:true
                }
            }]
        }
    }
});

setTimeout(function(){
  var imgData = ctx.toDataURL();
  var pdf = new jsPDF("l", "mm", "a4");
  pdf.addImage(imgData, 'JPEG', 10, 10, 277, 190);
  pdf.save("chart.pdf");
}, 1000);

html2canvas(document.body, {
  onrendered: function(canvas) {
    document.body.appendChild(canvas);
  }
});

 

READ  Build a Virtual or Fake Command Line or Terminal in Browser Using HTML5 CSS3 and Javascript Full Project For Beginners

 

Now if you open the index.html file inside the browser you will see the below screenshot

 

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