canvg.js

/* eslint-env browser, node */
/* globals $, Sizzle, Windows, ActiveXObject */
/* eslint-disable no-redeclare */
var RGBColor = require('rgbcolor'),
  StackBlur = require('stackblur-canvas'),
  Canvas = require('canvas');

var isNode = (typeof module !== 'undefined' && module.exports && typeof window === 'undefined'),
  nodeEnv = isNode;

var JSDOM, windowEnv;

if (nodeEnv) {
  JSDOM = require('jsdom').JSDOM;
  windowEnv = new JSDOM().window;
  windowEnv.DOMParser = require('xmldom').DOMParser;
} else {
  JSDOM = null;
  windowEnv = window;
  windowEnv.DOMParser = window.DOMParser;
}

var doc = windowEnv.document,
  defaultClientWidth = 800,
  defaultClientHeight = 600;

function createCanvas(width, height) {
  var c;
  if (nodeEnv) {
    c = Canvas.createCanvas(width, height);
  } else {
    c = doc.createElement('canvas');
    c.width = width;
    c.height = height;
  }
  return c;
}

// canvg(target, s)
// empty parameters: replace all 'svg' elements on page with 'canvas' elements
// target: canvas element or the id of a canvas element
// s: svg string, url to svg file, or xml document
// opts: optional hash of options
//       ignoreMouse: true => ignore mouse events
//       ignoreAnimation: true => ignore animations
//       ignoreDimensions: true => does not try to resize canvas
//       ignoreClear: true => does not clear canvas
//       offsetX: int => draws at a x offset
//       offsetY: int => draws at a y offset
//       scaleWidth: int => scales horizontally to width
//       scaleHeight: int => scales vertically to height
//       renderCallback: function => will call the function after the first render is completed
//       enableRedraw: function => whether enable the redraw interval in node environment
//       forceRedraw: function => will call the function on every frame, if it returns true, will redraw
var canvg = function (target, s, opts) {
  // no parameters
  if (target == null && s == null && opts == null) {
    var svgTags = doc.querySelectorAll('svg');
    for (var i = 0; i < svgTags.length; i++) {
      var svgTag = svgTags[i];
      var c = doc.createElement('canvas');
      if (typeof(svgTag.clientWidth) !== 'undefined' && typeof(svgTag.clientHeight) !== 'undefined') {
        c.width = svgTag.clientWidth;
        c.height = svgTag.clientHeight;
      } else {
        var rect = svgTag.getBoundingClientRect();
        c.width = rect.width;
        c.height = rect.height;
      }
      svgTag.parentNode.insertBefore(c, svgTag);
      svgTag.parentNode.removeChild(svgTag);
      var div = doc.createElement('div');
      div.appendChild(svgTag);
      canvg(c, div.innerHTML);
    }
    return;
  }

  var svg = build(opts || {});
  if (nodeEnv) {
    if (!s || s === '') {
      return;
    }
    //only support svg string in node env.
    svg.loadXml(target.getContext('2d'), s);
    return;
  }

  if (typeof target == 'string') {
    target = doc.getElementById(target);
  }

  // store class on canvas
  if (target.svg != null) target.svg.stop();

  // on i.e. 8 for flash canvas, we can't assign the property so check for it
  if (!(target.childNodes && target.childNodes.length == 1 && target.childNodes[0].nodeName == 'OBJECT')) target.svg = svg;

  var ctx = target.getContext('2d');

  if (typeof s.documentElement != 'undefined') {
    // load from xml doc
    svg.loadXmlDoc(ctx, s);
  } else if (s.substr(0, 1) == '<') {
    // load from xml string
    svg.loadXml(ctx, s);
  } else {
    // load from url
    svg.load(ctx, s);
  }
}

var matchesSelector;
if (nodeEnv) {
  //Now only used to decide whether the node has the class names specified by selector,
  //Add this implementation to avoid compatibility issues in node env.
  matchesSelector = function (node, selector) {
    var styleClasses = node.getAttribute('class');
    if (!styleClasses || styleClasses === '') {
      return false;
    }
    styleClasses = styleClasses.split(' ');
    for (var i = 0; i < styleClasses.length; i++) {
      if ('.' + styleClasses[i] === selector) {
        return true;
      }
    }
    return false;
  };
} else {
  // see https://developer.mozilla.org/en-US/docs/Web/API/Element.matches
  if (typeof Element == 'undefined') {
    // We include this test, as otherwise IE7 will throw an error simply by
    // including this file, as it does not support the Element object.
  } else if (typeof Element.prototype.matches != 'undefined') {
    matchesSelector = function (node, selector) {
      return node.matches(selector);
    };
  } else if (typeof Element.prototype.webkitMatchesSelector != 'undefined') {
    matchesSelector = function (node, selector) {
      return node.webkitMatchesSelector(selector);
    };
  } else if (typeof Element.prototype.mozMatchesSelector != 'undefined') {
    matchesSelector = function (node, selector) {
      return node.mozMatchesSelector(selector);
    };
  } else if (typeof Element.prototype.msMatchesSelector != 'undefined') {
    matchesSelector = function (node, selector) {
      return node.msMatchesSelector(selector);
    };
  } else if (typeof Element.prototype.oMatchesSelector != 'undefined') {
    matchesSelector = function (node, selector) {
      return node.oMatchesSelector(selector);
    };
  } else {
    // requires Sizzle: https://github.com/jquery/sizzle/wiki/Sizzle-Documentation
    // or jQuery: http://jquery.com/download/
    // or Zepto: http://zeptojs.com/#
    // without it, this is a ReferenceError

    if (typeof jQuery === 'function' || typeof Zepto === 'function') {
      matchesSelector = function (node, selector) {
        return $(node).is(selector);
      };
    }

    if (typeof matchesSelector === 'undefined' && typeof Sizzle !== 'undefined') {
      matchesSelector = Sizzle.matchesSelector;
    }
  }
}

// slightly modified version of https://github.com/keeganstreet/specificity/blob/master/specificity.js
var attributeRegex = /(\[[^\]]+\])/g;
var idRegex = /(#[^\s\+>~\.\[:]+)/g;
var classRegex = /(\.[^\s\+>~\.\[:]+)/g;
var pseudoElementRegex = /(::[^\s\+>~\.\[:]+|:first-line|:first-letter|:before|:after)/gi;
var pseudoClassWithBracketsRegex = /(:[\w-]+\([^\)]*\))/gi;
var pseudoClassRegex = /(:[^\s\+>~\.\[:]+)/g;
var elementRegex = /([^\s\+>~\.\[:]+)/g;

function getSelectorSpecificity(selector) {
  var typeCount = [0, 0, 0];
  var findMatch = function (regex, type) {
    var matches = selector.match(regex);
    if (matches == null) {
      return;
    }
    typeCount[type] += matches.length;
    selector = selector.replace(regex, ' ');
  };

  selector = selector.replace(/:not\(([^\)]*)\)/g, '     $1 ');
  selector = selector.replace(/{[\s\S]*/gm, ' ');
  findMatch(attributeRegex, 1);
  findMatch(idRegex, 0);
  findMatch(classRegex, 1);
  findMatch(pseudoElementRegex, 2);
  findMatch(pseudoClassWithBracketsRegex, 1);
  findMatch(pseudoClassRegex, 1);
  selector = selector.replace(/[\*\s\+>~]/g, ' ');
  selector = selector.replace(/[#\.]/g, ' ');
  findMatch(elementRegex, 2);
  return typeCount.join('');
}

function build(opts) {
  var svg = { opts: opts };

  svg.FRAMERATE = 30;
  svg.MAX_VIRTUAL_PIXELS = 30000;

  svg.rootEmSize = 12;
  svg.emSize = 12;

  svg.log = function (/* msg */) { };
  if (svg.opts['log'] == true && typeof console != 'undefined') {
    svg.log = function (msg) { console.log(msg); }; // eslint-disable-line no-console
  }

  // globals
  svg.init = function (ctx) {
    var uniqueId = 0;
    svg.UniqueId = function () { uniqueId++; return 'canvg' + uniqueId; };
    svg.Definitions = {};
    svg.Styles = {};
    svg.StylesSpecificity = {};
    svg.Animations = [];
    svg.Images = [];
    svg.ctx = ctx;
    svg.ViewPort = new (function () {

      this.viewPorts = [];
      this.Clear = function () { this.viewPorts = []; }
      this.SetCurrent = function (width, height) { this.viewPorts.push({ width: width, height: height }); }
      this.RemoveCurrent = function () { this.viewPorts.pop(); }
      this.Current = function () { return this.viewPorts[this.viewPorts.length - 1]; }
      this.width = function () { return this.Current().width; }
      this.height = function () { return this.Current().height; }
      this.ComputeSize = function (d) {
        if (d != null && typeof d == 'number') return d;
        if (d == 'x') return this.width();
        if (d == 'y') return this.height();
        return Math.sqrt(Math.pow(this.width(), 2) + Math.pow(this.height(), 2)) / Math.sqrt(2);
      }
    });
  }
  svg.init();

  // images loaded
  svg.ImagesLoaded = function () {
    for (var i = 0; i < svg.Images.length; i++) {
      if (!svg.Images[i].loaded) return false;
    }
    return true;
  }

  // trim
  svg.trim = function (s) { return s.replace(/^\s+|\s+$/g, ''); }

  // compress non-ideographic spaces
  svg.compressSpaces = function (s) { return s.replace(/(?!\u3000)\s+/gm, ' '); }

  // ajax
  svg.ajax = function (url) {
    if (nodeEnv) { return null; }
    var AJAX;
    if (windowEnv.XMLHttpRequest) { AJAX = new windowEnv.XMLHttpRequest(); } else { AJAX = new ActiveXObject('Microsoft.XMLHTTP'); }
    if (AJAX) {
      AJAX.open('GET', url, false);
      AJAX.send(null);
      return AJAX.responseText;
    }
    return null;
  }

  // parse xml
  svg.parseXml = function (xml) {
    if (typeof Windows != 'undefined' && typeof Windows.Data != 'undefined' && typeof Windows.Data.Xml != 'undefined') {
      var xmlDoc = new Windows.Data.Xml.Dom.XmlDocument();
      var settings = new Windows.Data.Xml.Dom.XmlLoadSettings();
      settings.prohibitDtd = false;
      xmlDoc.loadXml(xml, settings);
      return xmlDoc;
    } else if (windowEnv.DOMParser) {
      try {
        var parser = opts.xmldom ? new windowEnv.DOMParser(opts.xmldom) : new windowEnv.DOMParser();
        return parser.parseFromString(xml, 'image/svg+xml');
      } catch (e) {
        parser = opts.xmldom ? new windowEnv.DOMParser(opts.xmldom) : new windowEnv.DOMParser();
        return parser.parseFromString(xml, 'text/xml');
      }
    } else {
      xml = xml.replace(/<!DOCTYPE svg[^>]*>/, '');
      var xmlDoc = new ActiveXObject('Microsoft.XMLDOM');
      xmlDoc.async = 'false';
      xmlDoc.loadXML(xml);
      return xmlDoc;
    }
  }

  svg.Property = function (name, value) {
    this.name = name;
    this.value = value;
  }
  svg.Property.prototype.getValue = function () {
    return this.value;
  }

  svg.Property.prototype.hasValue = function () {
    return (this.value != null && this.value !== '');
  }

  // return the numerical value of the property
  svg.Property.prototype.numValue = function () {
    if (!this.hasValue()) return 0;

    var n = parseFloat(this.value);
    if ((this.value + '').match(/%$/)) {
      n = n / 100.0;
    }
    return n;
  }

  svg.Property.prototype.valueOrDefault = function (def) {
    if (this.hasValue()) return this.value;
    return def;
  }

  svg.Property.prototype.numValueOrDefault = function (def) {
    if (this.hasValue()) return this.numValue();
    return parseFloat(def);
  }

  // color extensions
  // augment the current color value with the opacity
  svg.Property.prototype.addOpacity = function (opacityProp) {
    var newValue = this.value;
    if (opacityProp.value != null && opacityProp.value != '' && typeof this.value == 'string') { // can only add opacity to colors, not patterns
      var color = new RGBColor(this.value);
      if (color.ok) {
        newValue = 'rgba(' + color.r + ', ' + color.g + ', ' + color.b + ', ' + opacityProp.numValue() + ')';
      }
    }
    return new svg.Property(this.name, newValue);
  }

  // definition extensions
  // get the definition from the definitions table
  svg.Property.prototype.getDefinition = function () {
    var name = this.value.match(/#([^\)'"]+)/);
    if (name) { name = name[1]; }
    if (!name) { name = this.value; }
    return svg.Definitions[name];
  }

  svg.Property.prototype.isUrlDefinition = function () {
    return this.value.indexOf('url(') == 0
  }

  svg.Property.prototype.getFillStyleDefinition = function (e, opacityProp) {
    var def = this.getDefinition();

    // gradient
    if (def != null && def.createGradient) {
      return def.createGradient(svg.ctx, e, opacityProp);
    }

    // pattern
    if (def != null && def.createPattern) {
      if (def.getHrefAttribute().hasValue()) {
        var pt = def.attribute('patternTransform');
        def = def.getHrefAttribute().getDefinition();
        if (pt.hasValue()) { def.attribute('patternTransform', true).value = pt.value; }
      }
      return def.createPattern(svg.ctx, e, opacityProp);
    }

    return null;
  }

  // length extensions
  svg.Property.prototype.getDPI = function (/* viewPort */) {
    return 96.0; // TODO: compute?
  }

  svg.Property.prototype.getREM = function (/* viewPort */) {
    return svg.rootEmSize;
  }

  svg.Property.prototype.getEM = function (/* viewPort */) {
    return svg.emSize;
  }

  svg.Property.prototype.getUnits = function () {
    var s = this.value + '';
    return s.replace(/[0-9\.\-]/g, '');
  }

  svg.Property.prototype.isPixels = function () {
    if (!this.hasValue()) return false;
    var s = this.value + '';
    if (s.match(/px$/)) return true;
    if (s.match(/^[0-9]+$/)) return true;
    return false;
  }

  // get the length as pixels
  svg.Property.prototype.toPixels = function (viewPort, processPercent) {
    if (!this.hasValue()) return 0;
    var s = this.value + '';
    if (s.match(/rem$/)) return this.numValue() * this.getREM(viewPort);
    if (s.match(/em$/)) return this.numValue() * this.getEM(viewPort);
    if (s.match(/ex$/)) return this.numValue() * this.getEM(viewPort) / 2.0;
    if (s.match(/px$/)) return this.numValue();
    if (s.match(/pt$/)) return this.numValue() * this.getDPI(viewPort) * (1.0 / 72.0);
    if (s.match(/pc$/)) return this.numValue() * 15;
    if (s.match(/cm$/)) return this.numValue() * this.getDPI(viewPort) / 2.54;
    if (s.match(/mm$/)) return this.numValue() * this.getDPI(viewPort) / 25.4;
    if (s.match(/in$/)) return this.numValue() * this.getDPI(viewPort);
    if (s.match(/%$/)) return this.numValue() * svg.ViewPort.ComputeSize(viewPort);
    var n = this.numValue();
    if (processPercent && n < 1.0) return n * svg.ViewPort.ComputeSize(viewPort);
    return n;
  }

  // time extensions
  // get the time as milliseconds
  // https://svgwg.org/specs/animations/#ClockValueSyntax
  svg.Property.prototype.toMilliseconds = function () {
    if (!this.hasValue()) return 0;
    var s = this.value + '';
    if (s.match(/ms$/)) return this.numValue();
    return this.numValue() * 1000;
  }

  // angle extensions
  // get the angle as radians
  svg.Property.prototype.toRadians = function () {
    if (!this.hasValue()) return 0;
    var s = this.value + '';
    if (s.match(/deg$/)) return this.numValue() * (Math.PI / 180.0);
    if (s.match(/grad$/)) return this.numValue() * (Math.PI / 200.0);
    if (s.match(/rad$/)) return this.numValue();
    return this.numValue() * (Math.PI / 180.0);
  }

  // text extensions
  // get the text baseline
  var textBaselineMapping = {
    'baseline': 'alphabetic',
    'before-edge': 'top',
    'text-before-edge': 'top',
    'middle': 'middle',
    'central': 'middle',
    'after-edge': 'bottom',
    'text-after-edge': 'bottom',
    'ideographic': 'ideographic',
    'alphabetic': 'alphabetic',
    'hanging': 'hanging',
    'mathematical': 'alphabetic'
  };
  svg.Property.prototype.toTextBaseline = function () {
    if (!this.hasValue()) return null;
    return textBaselineMapping[this.value];
  }

  // fonts
  svg.Font = new (function () {
    this.Styles = 'normal|italic|oblique|inherit';
    this.Variants = 'normal|small-caps|inherit';
    this.Weights = 'normal|bold|bolder|lighter|100|200|300|400|500|600|700|800|900|inherit';

    this.CreateFont = function (fontStyle, fontVariant, fontWeight, fontSize, fontFamily, inherit) {
      var f = inherit != null ? this.Parse(inherit) : this.CreateFont('', '', '', '', '', svg.ctx.font);
      fontFamily = fontFamily || f.fontFamily;
      if (nodeEnv && fontFamily) {
        var trimmedFontParts = fontFamily.trim().split(',');
        for (var i = 0; i < trimmedFontParts.length; i++) {
          if (!trimmedFontParts[i].startsWith('"')) {
            trimmedFontParts[i] = '"' + trimmedFontParts[i].trim() + '"';
          }
        }
        fontFamily = trimmedFontParts.join(',')
      }
      return {
        fontFamily: fontFamily,
        fontSize: fontSize || f.fontSize,
        fontStyle: fontStyle || f.fontStyle,
        fontWeight: fontWeight || f.fontWeight,
        fontVariant: fontVariant || f.fontVariant,
        toString: function () { return [this.fontStyle, this.fontVariant, this.fontWeight, this.fontSize, this.fontFamily].join(' ') }
      }
    }

    var that = this;
    this.Parse = function (s) {
      var f = {};
      var d = svg.trim(svg.compressSpaces(s || '')).split(' ');
      var set = { fontSize: false, fontStyle: false, fontWeight: false, fontVariant: false }
      var ff = '';
      for (var i = 0; i < d.length; i++) {
        if (!set.fontStyle && that.Styles.indexOf(d[i]) != -1) {
          if (d[i] != 'inherit') f.fontStyle = d[i];
          set.fontStyle = true;
        } else if (!set.fontVariant && that.Variants.indexOf(d[i]) != -1) {
          if (d[i] != 'inherit') f.fontVariant = d[i];
          set.fontStyle = set.fontVariant = true;
        } else if (!set.fontWeight && that.Weights.indexOf(d[i]) != -1) {
          if (d[i] != 'inherit') f.fontWeight = d[i];
          set.fontStyle = set.fontVariant = set.fontWeight = true;
        } else if (!set.fontSize) {
          if (d[i] != 'inherit') f.fontSize = d[i].split('/')[0];
          set.fontStyle = set.fontVariant = set.fontWeight = set.fontSize = true;
        } else { if (d[i] != 'inherit') ff += d[i]; }
      }
      if (ff != '') f.fontFamily = ff;
      return f;
    }
  });

  // points and paths
  svg.ToNumberArray = function (s) {
    var a = (s || '').match(/-?(\d+(\.\d+)?|\.\d+)(?=\D|$)/gm) || [];
    for (var i = 0; i < a.length; i++) {
      a[i] = parseFloat(a[i]);
    }
    return a;
  }
  svg.Point = function (x, y) {
    this.x = x;
    this.y = y;
  }
  svg.Point.prototype.angleTo = function (p) {
    return Math.atan2(p.y - this.y, p.x - this.x);
  }

  svg.Point.prototype.applyTransform = function (v) {
    var xp = this.x * v[0] + this.y * v[2] + v[4];
    var yp = this.x * v[1] + this.y * v[3] + v[5];
    this.x = xp;
    this.y = yp;
  }

  svg.CreatePoint = function (s) {
    var a = svg.ToNumberArray(s);
    return new svg.Point(a[0], a[1]);
  }
  svg.CreatePath = function (s) {
    var a = svg.ToNumberArray(s);
    var path = [];
    for (var i = 0; i < a.length; i += 2) {
      path.push(new svg.Point(a[i], a[i + 1]));
    }
    return path;
  }

  // bounding box
  svg.BoundingBox = function (x1, y1, x2, y2) { // pass in initial points if you want
    this.x1 = Number.NaN;
    this.y1 = Number.NaN;
    this.x2 = Number.NaN;
    this.y2 = Number.NaN;

    this.x = function () { return this.x1; }
    this.y = function () { return this.y1; }
    this.width = function () { return this.x2 - this.x1; }
    this.height = function () { return this.y2 - this.y1; }

    this.addPoint = function (x, y) {
      if (x != null) {
        if (isNaN(this.x1) || isNaN(this.x2)) {
          this.x1 = x;
          this.x2 = x;
        }
        if (x < this.x1) this.x1 = x;
        if (x > this.x2) this.x2 = x;
      }

      if (y != null) {
        if (isNaN(this.y1) || isNaN(this.y2)) {
          this.y1 = y;
          this.y2 = y;
        }
        if (y < this.y1) this.y1 = y;
        if (y > this.y2) this.y2 = y;
      }
    }
    this.addX = function (x) { this.addPoint(x, null); }
    this.addY = function (y) { this.addPoint(null, y); }

    this.addBoundingBox = function (bb) {
      this.addPoint(bb.x1, bb.y1);
      this.addPoint(bb.x2, bb.y2);
    }

    this.addQuadraticCurve = function (p0x, p0y, p1x, p1y, p2x, p2y) {
      var cp1x = p0x + 2 / 3 * (p1x - p0x); // CP1 = QP0 + 2/3 *(QP1-QP0)
      var cp1y = p0y + 2 / 3 * (p1y - p0y); // CP1 = QP0 + 2/3 *(QP1-QP0)
      var cp2x = cp1x + 1 / 3 * (p2x - p0x); // CP2 = CP1 + 1/3 *(QP2-QP0)
      var cp2y = cp1y + 1 / 3 * (p2y - p0y); // CP2 = CP1 + 1/3 *(QP2-QP0)
      this.addBezierCurve(p0x, p0y, cp1x, cp2x, cp1y, cp2y, p2x, p2y);
    }

    this.addBezierCurve = function (p0x, p0y, p1x, p1y, p2x, p2y, p3x, p3y) {
      // from http://blog.hackers-cafe.net/2009/06/how-to-calculate-bezier-curves-bounding.html
      var p0 = [p0x, p0y],
        p1 = [p1x, p1y],
        p2 = [p2x, p2y],
        p3 = [p3x, p3y];
      this.addPoint(p0[0], p0[1]);
      this.addPoint(p3[0], p3[1]);

      for (var i = 0; i <= 1; i++) {
        var f = function (t) {
          return Math.pow(1 - t, 3) * p0[i] +
            3 * Math.pow(1 - t, 2) * t * p1[i] +
            3 * (1 - t) * Math.pow(t, 2) * p2[i] +
            Math.pow(t, 3) * p3[i];
        }

        var b = 6 * p0[i] - 12 * p1[i] + 6 * p2[i];
        var a = -3 * p0[i] + 9 * p1[i] - 9 * p2[i] + 3 * p3[i];
        var c = 3 * p1[i] - 3 * p0[i];

        if (a == 0) {
          if (b == 0) continue;
          var t = -c / b;
          if (0 < t && t < 1) {
            if (i == 0) this.addX(f(t));
            if (i == 1) this.addY(f(t));
          }
          continue;
        }

        var b2ac = Math.pow(b, 2) - 4 * c * a;
        if (b2ac < 0) continue;
        var t1 = (-b + Math.sqrt(b2ac)) / (2 * a);
        if (0 < t1 && t1 < 1) {
          if (i == 0) this.addX(f(t1));
          if (i == 1) this.addY(f(t1));
        }
        var t2 = (-b - Math.sqrt(b2ac)) / (2 * a);
        if (0 < t2 && t2 < 1) {
          if (i == 0) this.addX(f(t2));
          if (i == 1) this.addY(f(t2));
        }
      }
    }

    this.isPointInBox = function (x, y) {
      return (this.x1 <= x && x <= this.x2 && this.y1 <= y && y <= this.y2);
    }

    this.addPoint(x1, y1);
    this.addPoint(x2, y2);
  }

  // transforms
  svg.Transform = function (v) {
    var that = this;
    this.Type = {}

    // translate
    this.Type.translate = function (s) {
      this.p = svg.CreatePoint(s);
      this.apply = function (ctx) {
        ctx.translate(this.p.x || 0.0, this.p.y || 0.0);
      }
      this.unapply = function (ctx) {
        ctx.translate(-1.0 * this.p.x || 0.0, -1.0 * this.p.y || 0.0);
      }
      this.applyToPoint = function (p) {
        p.applyTransform([1, 0, 0, 1, this.p.x || 0.0, this.p.y || 0.0]);
      }
    }

    // rotate
    this.Type.rotate = function (s) {
      var a = svg.ToNumberArray(s);
      this.angle = new svg.Property('angle', a[0]);
      this.cx = a[1] || 0;
      this.cy = a[2] || 0;
      this.apply = function (ctx) {
        ctx.translate(this.cx, this.cy);
        ctx.rotate(this.angle.toRadians());
        ctx.translate(-this.cx, -this.cy);
      }
      this.unapply = function (ctx) {
        ctx.translate(this.cx, this.cy);
        ctx.rotate(-1.0 * this.angle.toRadians());
        ctx.translate(-this.cx, -this.cy);
      }
      this.applyToPoint = function (p) {
        var a = this.angle.toRadians();
        p.applyTransform([1, 0, 0, 1, this.p.x || 0.0, this.p.y || 0.0]);
        p.applyTransform([Math.cos(a), Math.sin(a), -Math.sin(a), Math.cos(a), 0, 0]);
        p.applyTransform([1, 0, 0, 1, -this.p.x || 0.0, -this.p.y || 0.0]);
      }
    }

    this.Type.scale = function (s) {
      this.p = svg.CreatePoint(s);
      this.apply = function (ctx) {
        ctx.scale(this.p.x || 1.0, this.p.y || this.p.x || 1.0);
      }
      this.unapply = function (ctx) {
        ctx.scale(1.0 / this.p.x || 1.0, 1.0 / this.p.y || this.p.x || 1.0);
      }
      this.applyToPoint = function (p) {
        p.applyTransform([this.p.x || 0.0, 0, 0, this.p.y || 0.0, 0, 0]);
      }
    }

    this.Type.matrix = function (s) {
      this.m = svg.ToNumberArray(s);
      this.apply = function (ctx) {
        ctx.transform(this.m[0], this.m[1], this.m[2], this.m[3], this.m[4], this.m[5]);
      }
      this.unapply = function (ctx) {
        var a = this.m[0];
        var b = this.m[2];
        var c = this.m[4];
        var d = this.m[1];
        var e = this.m[3];
        var f = this.m[5];
        var g = 0.0;
        var h = 0.0;
        var i = 1.0;
        var det = 1 / (a * (e * i - f * h) - b * (d * i - f * g) + c * (d * h - e * g));
        ctx.transform(
          det * (e * i - f * h),
          det * (f * g - d * i),
          det * (c * h - b * i),
          det * (a * i - c * g),
          det * (b * f - c * e),
          det * (c * d - a * f)
        );
      }
      this.applyToPoint = function (p) {
        p.applyTransform(this.m);
      }
    }

    this.Type.SkewBase = function (s) {
      this.base = that.Type.matrix;
      this.base(s);
      this.angle = new svg.Property('angle', s);
    }
    this.Type.SkewBase.prototype = new this.Type.matrix;

    this.Type.skewX = function (s) {
      this.base = that.Type.SkewBase;
      this.base(s);
      this.m = [1, 0, Math.tan(this.angle.toRadians()), 1, 0, 0];
    }
    this.Type.skewX.prototype = new this.Type.SkewBase;

    this.Type.skewY = function (s) {
      this.base = that.Type.SkewBase;
      this.base(s);
      this.m = [1, Math.tan(this.angle.toRadians()), 0, 1, 0, 0];
    }
    this.Type.skewY.prototype = new this.Type.SkewBase;

    this.transforms = [];

    this.apply = function (ctx) {
      for (var i = 0; i < this.transforms.length; i++) {
        this.transforms[i].apply(ctx);
      }
    }

    this.unapply = function (ctx) {
      for (var i = this.transforms.length - 1; i >= 0; i--) {
        this.transforms[i].unapply(ctx);
      }
    }

    // TODO: applyToPoint unused ... remove?
    this.applyToPoint = function (p) {
      for (var i = 0; i < this.transforms.length; i++) {
        this.transforms[i].applyToPoint(p);
      }
    }

    var data = svg.trim(svg.compressSpaces(v)).replace(/\)([a-zA-Z])/g, ') $1').replace(/\)(\s?,\s?)/g, ') ').split(/\s(?=[a-z])/);
    for (var i = 0; i < data.length; i++) {
      if (data[i] === 'none') {
        continue;
      }

      var type = svg.trim(data[i].split('(')[0]);
      var s = data[i].split('(')[1].replace(')', '');
      var transformType = this.Type[type];
      if (typeof transformType != 'undefined') {
        var transform = new transformType(s);
        transform.type = type;
        this.transforms.push(transform);
      }
    }
  }

  // aspect ratio
  svg.AspectRatio = function (ctx, aspectRatio, width, desiredWidth, height, desiredHeight, minX, minY, refX, refY) {
    // aspect ratio - http://www.w3.org/TR/SVG/coords.html#PreserveAspectRatioAttribute
    aspectRatio = svg.compressSpaces(aspectRatio);
    aspectRatio = aspectRatio.replace(/^defer\s/, ''); // ignore defer
    var align = aspectRatio.split(' ')[0] || 'xMidYMid';
    var meetOrSlice = aspectRatio.split(' ')[1] || 'meet';

    // calculate scale
    var scaleX = width / desiredWidth;
    var scaleY = height / desiredHeight;
    var scaleMin = Math.min(scaleX, scaleY);
    var scaleMax = Math.max(scaleX, scaleY);
    if (meetOrSlice == 'meet') {
      desiredWidth *= scaleMin;
      desiredHeight *= scaleMin;
    }
    if (meetOrSlice == 'slice') {
      desiredWidth *= scaleMax;
      desiredHeight *= scaleMax;
    }

    refX = new svg.Property('refX', refX);
    refY = new svg.Property('refY', refY);
    if (refX.hasValue() && refY.hasValue()) {
      ctx.translate(-scaleMin * refX.toPixels('x'), -scaleMin * refY.toPixels('y'));
    } else {
      // align
      if (align.match(/^xMid/) && ((meetOrSlice == 'meet' && scaleMin == scaleY) || (meetOrSlice == 'slice' && scaleMax == scaleY))) ctx.translate(width / 2.0 - desiredWidth / 2.0, 0);
      if (align.match(/YMid$/) && ((meetOrSlice == 'meet' && scaleMin == scaleX) || (meetOrSlice == 'slice' && scaleMax == scaleX))) ctx.translate(0, height / 2.0 - desiredHeight / 2.0);
      if (align.match(/^xMax/) && ((meetOrSlice == 'meet' && scaleMin == scaleY) || (meetOrSlice == 'slice' && scaleMax == scaleY))) ctx.translate(width - desiredWidth, 0);
      if (align.match(/YMax$/) && ((meetOrSlice == 'meet' && scaleMin == scaleX) || (meetOrSlice == 'slice' && scaleMax == scaleX))) ctx.translate(0, height - desiredHeight);
    }

    // scale
    if (align == 'none') ctx.scale(scaleX, scaleY);
    else if (meetOrSlice == 'meet') ctx.scale(scaleMin, scaleMin);
    else if (meetOrSlice == 'slice') ctx.scale(scaleMax, scaleMax);

    // translate
    ctx.translate(minX == null ? 0 : -minX, minY == null ? 0 : -minY);
  }

  // elements
  svg.Element = {}

  svg.EmptyProperty = new svg.Property('EMPTY', '');

  svg.Element.ElementBase = function (node) {
    this.attributes = {};
    this.styles = {};
    this.stylesSpecificity = {};
    this.children = [];

    // get or create attribute
    this.attribute = function (name, createIfNotExists) {
      var a = this.attributes[name];
      if (a != null) return a;

      if (createIfNotExists == true) {
        a = new svg.Property(name, '');
        this.attributes[name] = a;
      }
      return a || svg.EmptyProperty;
    }

    this.getHrefAttribute = function () {
      for (var a in this.attributes) {
        if (a == 'href' || a.match(/:href$/)) {
          return this.attributes[a];
        }
      }
      return svg.EmptyProperty;
    }

    // get or create style, crawls up node tree
    this.style = function (name, createIfNotExists, skipAncestors) {
      var s = this.styles[name];
      if (s != null) return s;

      var a = this.attribute(name);
      if (a != null && a.hasValue()) {
        this.styles[name] = a; // move up to me to cache
        return a;
      }

      if (skipAncestors != true) {
        var p = this.parent;
        if (p != null) {
          var ps = p.style(name);
          if (ps != null && ps.hasValue()) {
            return ps;
          }
        }
      }

      if (createIfNotExists == true) {
        s = new svg.Property(name, '');
        this.styles[name] = s;
      }
      return s || svg.EmptyProperty;
    }

    // base render
    this.render = function (ctx) {
      // don't render display=none
      if (this.style('display').value == 'none') return;

      // don't render visibility=hidden
      if (this.style('visibility').value == 'hidden') return;

      ctx.save();
      if (this.style('mask').hasValue()) { // mask
        var mask = this.style('mask').getDefinition();
        if (mask != null) mask.apply(ctx, this);
      } else if (this.style('filter').hasValue()) { // filter
        var filter = this.style('filter').getDefinition();
        if (filter != null) filter.apply(ctx, this);
      } else {
        this.setContext(ctx);
        this.renderChildren(ctx);
        this.clearContext(ctx);
      }
      ctx.restore();
    }

    // base set context
    this.setContext = function (/* ctx */) {
      // OVERRIDE ME!
    }

    // base clear context
    this.clearContext = function (/* ctx */) {
      // OVERRIDE ME!
    }

    // base render children
    this.renderChildren = function (ctx) {
      for (var i = 0; i < this.children.length; i++) {
        this.children[i].render(ctx);
      }
    }

    this.addChild = function (childNode, create) {
      var child = childNode;
      if (create) child = svg.CreateElement(childNode);
      child.parent = this;
      if (child.type != 'title') { this.children.push(child); }
    }

    this.addStylesFromStyleDefinition = function () {
      // add styles
      for (var selector in svg.Styles) {
        if (selector[0] != '@' && matchesSelector(node, selector)) {
          var styles = svg.Styles[selector];
          var specificity = svg.StylesSpecificity[selector];
          if (styles != null) {
            for (var name in styles) {
              var existingSpecificity = this.stylesSpecificity[name];
              if (typeof existingSpecificity == 'undefined') {
                existingSpecificity = '000';
              }
              if (specificity >= existingSpecificity) {
                this.styles[name] = styles[name];
                this.stylesSpecificity[name] = specificity;
              }
            }
          }
        }
      }
    };

    // Microsoft Edge fix
    var allUppercase = new RegExp('^[A-Z\-]+$');
    var normalizeAttributeName = function (name) {
      if (allUppercase.test(name)) {
        return name.toLowerCase();
      }
      return name;
    };

    if (node != null && node.nodeType == 1) { //ELEMENT_NODE
      // add attributes
      for (var i = 0; i < node.attributes.length; i++) {
        var attribute = node.attributes[i];
        var nodeName = normalizeAttributeName(attribute.nodeName);
        this.attributes[nodeName] = new svg.Property(nodeName, attribute.value);
      }

      this.addStylesFromStyleDefinition();

      // add inline styles
      if (this.attribute('style').hasValue()) {
        var styles = this.attribute('style').value.split(';');
        for (var i = 0; i < styles.length; i++) {
          if (svg.trim(styles[i]) != '') {
            var style = styles[i].split(':');
            var name = svg.trim(style[0]);
            var value = svg.trim(style[1]);
            this.styles[name] = new svg.Property(name, value);
          }
        }
      }

      // add id
      if (this.attribute('id').hasValue()) {
        if (svg.Definitions[this.attribute('id').value] == null) {
          svg.Definitions[this.attribute('id').value] = this;
        }
      }

      // add children
      for (var i = 0; i < node.childNodes.length; i++) {
        var childNode = node.childNodes[i];
        if (childNode.nodeType == 1) this.addChild(childNode, true); //ELEMENT_NODE
        if (this.captureTextNodes && (childNode.nodeType == 3 || childNode.nodeType == 4)) {
          var text = childNode.value || childNode.text || childNode.textContent || '';
          if (svg.compressSpaces(text) != '') {
            this.addChild(new svg.Element.tspan(childNode), false); // TEXT_NODE
          }
        }
      }
    }
  }

  svg.Element.RenderedElementBase = function (node) {
    this.base = svg.Element.ElementBase;
    this.base(node);

    this.calculateOpacity = function() {
      var opacity = 1.0;

      var el = this;
      while (el != null) {
        var opacityStyle = el.style('opacity', false, true); // no ancestors on style call
        if (opacityStyle.hasValue()) {
          opacity = opacity * opacityStyle.numValue();
        }
        el = el.parent;
      }

      return opacity;
    }

    this.setContext = function (ctx, fromMeasure) {
      if (!fromMeasure) { // causes stack overflow when measuring text with gradients
        // fill
        if (this.style('fill').isUrlDefinition()) {
          var fs = this.style('fill').getFillStyleDefinition(this, this.style('fill-opacity'));
          if (fs != null) ctx.fillStyle = fs;
        } else if (this.style('fill').hasValue()) {
          var fillStyle = this.style('fill');
          if (fillStyle.value == 'currentColor') fillStyle.value = this.style('color').value;
          if (fillStyle.value != 'inherit') ctx.fillStyle = (fillStyle.value == 'none' ? 'rgba(0,0,0,0)' : fillStyle.value);
        }
        if (this.style('fill-opacity').hasValue()) {
          var fillStyle = new svg.Property('fill', ctx.fillStyle);
          fillStyle = fillStyle.addOpacity(this.style('fill-opacity'));
          ctx.fillStyle = fillStyle.value;
        }

        // stroke
        if (this.style('stroke').isUrlDefinition()) {
          var fs = this.style('stroke').getFillStyleDefinition(this, this.style('stroke-opacity'));
          if (fs != null) ctx.strokeStyle = fs;
        } else if (this.style('stroke').hasValue()) {
          var strokeStyle = this.style('stroke');
          if (strokeStyle.value == 'currentColor') strokeStyle.value = this.style('color').value;
          if (strokeStyle.value != 'inherit') ctx.strokeStyle = (strokeStyle.value == 'none' ? 'rgba(0,0,0,0)' : strokeStyle.value);
        }
        if (this.style('stroke-opacity').hasValue()) {
          var strokeStyle = new svg.Property('stroke', ctx.strokeStyle);
          strokeStyle = strokeStyle.addOpacity(this.style('stroke-opacity'));
          ctx.strokeStyle = strokeStyle.value;
        }
        if (this.style('stroke-width').hasValue()) {
          var newLineWidth = this.style('stroke-width').toPixels();
          ctx.lineWidth = newLineWidth == 0 ? 0.001 : newLineWidth; // browsers don't respect 0
        }
        if (this.style('stroke-linecap').hasValue()) ctx.lineCap = this.style('stroke-linecap').value;
        if (this.style('stroke-linejoin').hasValue()) ctx.lineJoin = this.style('stroke-linejoin').value;
        if (this.style('stroke-miterlimit').hasValue()) ctx.miterLimit = this.style('stroke-miterlimit').value;
        if (this.style('paint-order').hasValue()) ctx.paintOrder = this.style('paint-order').value;
        if (this.style('stroke-dasharray').hasValue() && this.style('stroke-dasharray').value != 'none') {
          var gaps = svg.ToNumberArray(this.style('stroke-dasharray').value);
          if (typeof ctx.setLineDash != 'undefined') { ctx.setLineDash(gaps); } else if (typeof ctx.webkitLineDash != 'undefined') { ctx.webkitLineDash = gaps; } else if (typeof ctx.mozDash != 'undefined' && !(gaps.length == 1 && gaps[0] == 0)) { ctx.mozDash = gaps; }

          var offset = this.style('stroke-dashoffset').toPixels();
          if (typeof ctx.lineDashOffset != 'undefined') { ctx.lineDashOffset = offset; } else if (typeof ctx.webkitLineDashOffset != 'undefined') { ctx.webkitLineDashOffset = offset; } else if (typeof ctx.mozDashOffset != 'undefined') { ctx.mozDashOffset = offset; }
        }
      }

      // font
      if (typeof ctx.font != 'undefined') {
        ctx.font = svg.Font.CreateFont(
          this.style('font-style').value,
          this.style('font-variant').value,
          this.style('font-weight').value,
          this.style('font-size').hasValue() ? this.style('font-size').toPixels() + 'px' : '',
          this.style('font-family').value).toString();

        // update em size if needed
        var currentFontSize = this.style('font-size', false, false);
        if (currentFontSize.isPixels()) {
          svg.emSize = currentFontSize.toPixels();
        }
      }

      // transform
      if (this.style('transform', false, true).hasValue()) {
        var transform = new svg.Transform(this.style('transform', false, true).value);
        transform.apply(ctx);
      }

      // clip
      if (this.style('clip-path', false, true).hasValue()) {
        var clip = this.style('clip-path', false, true).getDefinition();
        if (clip != null) clip.apply(ctx);
      }

      // opacity
      ctx.globalAlpha = this.calculateOpacity();
    }
  }
  svg.Element.RenderedElementBase.prototype = new svg.Element.ElementBase;

  svg.Element.PathElementBase = function (node) {
    this.base = svg.Element.RenderedElementBase;
    this.base(node);

    this.path = function (ctx) {
      if (ctx != null) ctx.beginPath();
      return new svg.BoundingBox();
    }

    this.renderChildren = function (ctx) {
      this.path(ctx);
      svg.Mouse.checkPath(this, ctx);
      if (ctx.fillStyle != '') {
        if (this.style('fill-rule').valueOrDefault('inherit') != 'inherit') { ctx.fill(this.style('fill-rule').value); } else { ctx.fill(); }
      }
      if (ctx.strokeStyle != '') ctx.stroke();

      var markers = this.getMarkers();
      if (markers != null) {
        if (this.style('marker-start').isUrlDefinition()) {
          var marker = this.style('marker-start').getDefinition();
          marker.render(ctx, markers[0][0], markers[0][1]);
        }
        if (this.style('marker-mid').isUrlDefinition()) {
          var marker = this.style('marker-mid').getDefinition();
          for (var i = 1; i < markers.length - 1; i++) {
            marker.render(ctx, markers[i][0], markers[i][1]);
          }
        }
        if (this.style('marker-end').isUrlDefinition()) {
          var marker = this.style('marker-end').getDefinition();
          marker.render(ctx, markers[markers.length - 1][0], markers[markers.length - 1][1]);
        }
      }
    }

    this.getBoundingBox = function () {
      return this.path();
    }

    this.getMarkers = function () {
      return null;
    }
  }
  svg.Element.PathElementBase.prototype = new svg.Element.RenderedElementBase;

  svg.SetDefaults = function (ctx) {
    // initial values and defaults
    ctx.strokeStyle = 'rgba(0,0,0,0)';
    ctx.lineCap = 'butt';
    ctx.lineJoin = 'miter';
    ctx.miterLimit = 4;
  }

  // svg element
  svg.Element.svg = function (node) {
    this.base = svg.Element.RenderedElementBase;
    this.base(node);

    this.baseClearContext = this.clearContext;
    this.clearContext = function (ctx) {
      this.baseClearContext(ctx);
      svg.ViewPort.RemoveCurrent();
    }

    this.baseSetContext = this.setContext;
    this.setContext = function (ctx) {
      svg.SetDefaults(ctx);
      if (ctx.canvas.style && typeof ctx.font != 'undefined' && typeof windowEnv.getComputedStyle != 'undefined') {
        ctx.font = windowEnv.getComputedStyle(ctx.canvas).getPropertyValue('font');

        var fontSize = new svg.Property('fontSize', svg.Font.Parse(ctx.font).fontSize);
        if (fontSize.hasValue()) svg.rootEmSize = svg.emSize = fontSize.toPixels('y');
      }

      this.baseSetContext(ctx);

      // create new view port
      if (!this.attribute('x').hasValue()) this.attribute('x', true).value = 0;
      if (!this.attribute('y').hasValue()) this.attribute('y', true).value = 0;
      ctx.translate(this.attribute('x').toPixels('x'), this.attribute('y').toPixels('y'));

      var width = svg.ViewPort.width();
      var height = svg.ViewPort.height();

      if (!this.attribute('width').hasValue()) this.attribute('width', true).value = '100%';
      if (!this.attribute('height').hasValue()) this.attribute('height', true).value = '100%';
      if (typeof this.root == 'undefined') {
        width = this.attribute('width').toPixels('x');
        height = this.attribute('height').toPixels('y');

        var x = 0;
        var y = 0;
        if (this.attribute('refX').hasValue() && this.attribute('refY').hasValue()) {
          x = -this.attribute('refX').toPixels('x');
          y = -this.attribute('refY').toPixels('y');
        }

        if (this.attribute('overflow').valueOrDefault('hidden') != 'visible') {
          ctx.beginPath();
          ctx.moveTo(x, y);
          ctx.lineTo(width, y);
          ctx.lineTo(width, height);
          ctx.lineTo(x, height);
          ctx.closePath();
          ctx.clip();
        }
      }
      svg.ViewPort.SetCurrent(width, height);

      // viewbox
      if (this.attribute('viewBox').hasValue()) {
        var viewBox = svg.ToNumberArray(this.attribute('viewBox').value);
        var minX = viewBox[0];
        var minY = viewBox[1];
        width = viewBox[2];
        height = viewBox[3];

        svg.AspectRatio(ctx,
          this.attribute('preserveAspectRatio').value,
          svg.ViewPort.width(),
          width,
          svg.ViewPort.height(),
          height,
          minX,
          minY,
          this.attribute('refX').value,
          this.attribute('refY').value);

        svg.ViewPort.RemoveCurrent();
        svg.ViewPort.SetCurrent(viewBox[2], viewBox[3]);
      }
    }
  }
  svg.Element.svg.prototype = new svg.Element.RenderedElementBase;

  // rect element
  svg.Element.rect = function (node) {
    this.base = svg.Element.PathElementBase;
    this.base(node);

    this.path = function (ctx) {
      var x = this.attribute('x').toPixels('x');
      var y = this.attribute('y').toPixels('y');
      var width = this.attribute('width').toPixels('x');
      var height = this.attribute('height').toPixels('y');
      var rx = this.attribute('rx').toPixels('x');
      var ry = this.attribute('ry').toPixels('y');
      if (this.attribute('rx').hasValue() && !this.attribute('ry').hasValue()) ry = rx;
      if (this.attribute('ry').hasValue() && !this.attribute('rx').hasValue()) rx = ry;
      rx = Math.min(rx, width / 2.0);
      ry = Math.min(ry, height / 2.0);

      if (ctx != null) {
        var KAPPA = 4 * ((Math.sqrt(2) - 1) / 3);
        ctx.beginPath(); // always start the path so we don't fill prior paths
        if (height > 0 && width > 0) {
          ctx.moveTo(x + rx, y);
          ctx.lineTo(x + width - rx, y);
          ctx.bezierCurveTo(x + width - rx + (KAPPA * rx), y, x + width, y + ry - (KAPPA * ry), x + width, y + ry);
          ctx.lineTo(x + width, y + height - ry);
          ctx.bezierCurveTo(x + width, y + height - ry + (KAPPA * ry), x + width - rx + (KAPPA * rx), y + height, x + width - rx, y + height);
          ctx.lineTo(x + rx, y + height);
          ctx.bezierCurveTo(x + rx - (KAPPA * rx), y + height, x, y + height - ry + (KAPPA * ry), x, y + height - ry);
          ctx.lineTo(x, y + ry);
          ctx.bezierCurveTo(x, y + ry - (KAPPA * ry), x + rx - (KAPPA * rx), y, x + rx, y);
          ctx.closePath();
        }
      }

      return new svg.BoundingBox(x, y, x + width, y + height);
    }
  }
  svg.Element.rect.prototype = new svg.Element.PathElementBase;

  // circle element
  svg.Element.circle = function (node) {
    this.base = svg.Element.PathElementBase;
    this.base(node);

    this.path = function (ctx) {
      var cx = this.attribute('cx').toPixels('x');
      var cy = this.attribute('cy').toPixels('y');
      var r = this.attribute('r').toPixels();

      if (ctx != null && r > 0) {
        ctx.beginPath();
        ctx.arc(cx, cy, r, 0, Math.PI * 2, false);
        ctx.closePath();
      }

      return new svg.BoundingBox(cx - r, cy - r, cx + r, cy + r);
    }
  }
  svg.Element.circle.prototype = new svg.Element.PathElementBase;

  // ellipse element
  svg.Element.ellipse = function (node) {
    this.base = svg.Element.PathElementBase;
    this.base(node);

    this.path = function (ctx) {
      var KAPPA = 4 * ((Math.sqrt(2) - 1) / 3);
      var rx = this.attribute('rx').toPixels('x');
      var ry = this.attribute('ry').toPixels('y');
      var cx = this.attribute('cx').toPixels('x');
      var cy = this.attribute('cy').toPixels('y');

      if (ctx != null) {
        ctx.beginPath();
        ctx.moveTo(cx + rx, cy);
        ctx.bezierCurveTo(cx + rx, cy + (KAPPA * ry), cx + (KAPPA * rx), cy + ry, cx, cy + ry);
        ctx.bezierCurveTo(cx - (KAPPA * rx), cy + ry, cx - rx, cy + (KAPPA * ry), cx - rx, cy);
        ctx.bezierCurveTo(cx - rx, cy - (KAPPA * ry), cx - (KAPPA * rx), cy - ry, cx, cy - ry);
        ctx.bezierCurveTo(cx + (KAPPA * rx), cy - ry, cx + rx, cy - (KAPPA * ry), cx + rx, cy);
        ctx.closePath();
      }

      return new svg.BoundingBox(cx - rx, cy - ry, cx + rx, cy + ry);
    }
  }
  svg.Element.ellipse.prototype = new svg.Element.PathElementBase;

  // line element
  svg.Element.line = function (node) {
    this.base = svg.Element.PathElementBase;
    this.base(node);

    this.getPoints = function () {
      return [
        new svg.Point(this.attribute('x1').toPixels('x'), this.attribute('y1').toPixels('y')),
        new svg.Point(this.attribute('x2').toPixels('x'), this.attribute('y2').toPixels('y'))
      ];
    }

    this.path = function (ctx) {
      var points = this.getPoints();

      if (ctx != null) {
        ctx.beginPath();
        ctx.moveTo(points[0].x, points[0].y);
        ctx.lineTo(points[1].x, points[1].y);
      }

      return new svg.BoundingBox(points[0].x, points[0].y, points[1].x, points[1].y);
    }

    this.getMarkers = function () {
      var points = this.getPoints();
      var a = points[0].angleTo(points[1]);
      return [
        [points[0], a],
        [points[1], a]
      ];
    }
  }
  svg.Element.line.prototype = new svg.Element.PathElementBase;

  // polyline element
  svg.Element.polyline = function (node) {
    this.base = svg.Element.PathElementBase;
    this.base(node);

    this.points = svg.CreatePath(this.attribute('points').value);
    this.path = function (ctx) {
      var bb = new svg.BoundingBox(this.points[0].x, this.points[0].y);
      if (ctx != null) {
        ctx.beginPath();
        ctx.moveTo(this.points[0].x, this.points[0].y);
      }
      for (var i = 1; i < this.points.length; i++) {
        bb.addPoint(this.points[i].x, this.points[i].y);
        if (ctx != null) ctx.lineTo(this.points[i].x, this.points[i].y);
      }
      return bb;
    }

    this.getMarkers = function () {
      var markers = [];
      for (var i = 0; i < this.points.length - 1; i++) {
        markers.push([this.points[i], this.points[i].angleTo(this.points[i + 1])]);
      }
      if (markers.length > 0) {
        markers.push([this.points[this.points.length - 1], markers[markers.length - 1][1]]);
      }
      return markers;
    }
  }
  svg.Element.polyline.prototype = new svg.Element.PathElementBase;

  // polygon element
  svg.Element.polygon = function (node) {
    this.base = svg.Element.polyline;
    this.base(node);

    this.basePath = this.path;
    this.path = function (ctx) {
      var bb = this.basePath(ctx);
      if (ctx != null) {
        ctx.lineTo(this.points[0].x, this.points[0].y);
        ctx.closePath();
      }
      return bb;
    }
  }
  svg.Element.polygon.prototype = new svg.Element.polyline;

  // path element
  svg.Element.path = function (node) {
    this.base = svg.Element.PathElementBase;
    this.base(node);

    var d = this.attribute('d').value;
    // TODO: convert to real lexer based on http://www.w3.org/TR/SVG11/paths.html#PathDataBNF
    d = d.replace(/,/gm, ' '); // get rid of all commas
    // As the end of a match can also be the start of the next match, we need to run this replace twice.
    for (var i = 0; i < 2; i++)
      d = d.replace(/([MmZzLlHhVvCcSsQqTtAa])([^\s])/gm, '$1 $2'); // suffix commands with spaces
    d = d.replace(/([^\s])([MmZzLlHhVvCcSsQqTtAa])/gm, '$1 $2'); // prefix commands with spaces
    d = d.replace(/([0-9])([+\-])/gm, '$1 $2'); // separate digits on +- signs
    // Again, we need to run this twice to find all occurances
    for (var i = 0; i < 2; i++)
      d = d.replace(/(\.[0-9]*)(\.)/gm, '$1 $2'); // separate digits when they start with a comma
    d = d.replace(/([Aa](\s+[0-9]+){3})\s+([01])\s*([01])/gm, '$1 $3 $4 '); // shorthand elliptical arc path syntax
    d = svg.compressSpaces(d); // compress multiple spaces
    d = svg.trim(d);
    this.PathParser = new (function (d) {
      this.tokens = d.split(' ');

      this.reset = function () {
        this.i = -1;
        this.command = '';
        this.previousCommand = '';
        this.start = new svg.Point(0, 0);
        this.control = new svg.Point(0, 0);
        this.current = new svg.Point(0, 0);
        this.points = [];
        this.angles = [];
      }

      this.isEnd = function () {
        return this.i >= this.tokens.length - 1;
      }

      this.isCommandOrEnd = function () {
        if (this.isEnd()) return true;
        return this.tokens[this.i + 1].match(/^[A-Za-z]$/) != null;
      }

      this.isRelativeCommand = function () {
        switch (this.command) {
          case 'm':
          case 'l':
          case 'h':
          case 'v':
          case 'c':
          case 's':
          case 'q':
          case 't':
          case 'a':
          case 'z':
            return true;
        }
        return false;
      }

      this.getToken = function () {
        this.i++;
        return this.tokens[this.i];
      }

      this.getScalar = function () {
        return parseFloat(this.getToken());
      }

      this.nextCommand = function () {
        this.previousCommand = this.command;
        this.command = this.getToken();
      }

      this.getPoint = function () {
        var p = new svg.Point(this.getScalar(), this.getScalar());
        return this.makeAbsolute(p);
      }

      this.getAsControlPoint = function () {
        var p = this.getPoint();
        this.control = p;
        return p;
      }

      this.getAsCurrentPoint = function () {
        var p = this.getPoint();
        this.current = p;
        return p;
      }

      this.getReflectedControlPoint = function () {
        if (this.previousCommand.toLowerCase() != 'c' &&
          this.previousCommand.toLowerCase() != 's' &&
          this.previousCommand.toLowerCase() != 'q' &&
          this.previousCommand.toLowerCase() != 't') {
          return this.current;
        }

        // reflect point
        var p = new svg.Point(2 * this.current.x - this.control.x, 2 * this.current.y - this.control.y);
        return p;
      }

      this.makeAbsolute = function (p) {
        if (this.isRelativeCommand()) {
          p.x += this.current.x;
          p.y += this.current.y;
        }
        return p;
      }

      this.addMarker = function (p, from, priorTo) {
        // if the last angle isn't filled in because we didn't have this point yet ...
        if (priorTo != null && this.angles.length > 0 && this.angles[this.angles.length - 1] == null) {
          this.angles[this.angles.length - 1] = this.points[this.points.length - 1].angleTo(priorTo);
        }
        this.addMarkerAngle(p, from == null ? null : from.angleTo(p));
      }

      this.addMarkerAngle = function (p, a) {
        this.points.push(p);
        this.angles.push(a);
      }

      this.getMarkerPoints = function () { return this.points; }
      this.getMarkerAngles = function () {
        for (var i = 0; i < this.angles.length; i++) {
          if (this.angles[i] == null) {
            for (var j = i + 1; j < this.angles.length; j++) {
              if (this.angles[j] != null) {
                this.angles[i] = this.angles[j];
                break;
              }
            }
          }
        }
        return this.angles;
      }
    })(d);

    this.path = function (ctx) {
      var pp = this.PathParser;
      pp.reset();

      var bb = new svg.BoundingBox();
      if (ctx != null) ctx.beginPath();
      while (!pp.isEnd()) {
        pp.nextCommand();
        switch (pp.command) {
          case 'M':
          case 'm':
            var p = pp.getAsCurrentPoint();
            pp.addMarker(p);
            bb.addPoint(p.x, p.y);
            if (ctx != null) ctx.moveTo(p.x, p.y);
            pp.start = pp.current;
            while (!pp.isCommandOrEnd()) {
              var p = pp.getAsCurrentPoint();
              pp.addMarker(p, pp.start);
              bb.addPoint(p.x, p.y);
              if (ctx != null) ctx.lineTo(p.x, p.y);
            }
            break;
          case 'L':
          case 'l':
            while (!pp.isCommandOrEnd()) {
              var c = pp.current;
              var p = pp.getAsCurrentPoint();
              pp.addMarker(p, c);
              bb.addPoint(p.x, p.y);
              if (ctx != null) ctx.lineTo(p.x, p.y);
            }
            break;
          case 'H':
          case 'h':
            while (!pp.isCommandOrEnd()) {
              var newP = new svg.Point((pp.isRelativeCommand() ? pp.current.x : 0) + pp.getScalar(), pp.current.y);
              pp.addMarker(newP, pp.current);
              pp.current = newP;
              bb.addPoint(pp.current.x, pp.current.y);
              if (ctx != null) ctx.lineTo(pp.current.x, pp.current.y);
            }
            break;
          case 'V':
          case 'v':
            while (!pp.isCommandOrEnd()) {
              var newP = new svg.Point(pp.current.x, (pp.isRelativeCommand() ? pp.current.y : 0) + pp.getScalar());
              pp.addMarker(newP, pp.current);
              pp.current = newP;
              bb.addPoint(pp.current.x, pp.current.y);
              if (ctx != null) ctx.lineTo(pp.current.x, pp.current.y);
            }
            break;
          case 'C':
          case 'c':
            while (!pp.isCommandOrEnd()) {
              var curr = pp.current;
              var p1 = pp.getPoint();
              var cntrl = pp.getAsControlPoint();
              var cp = pp.getAsCurrentPoint();
              pp.addMarker(cp, cntrl, p1);
              bb.addBezierCurve(curr.x, curr.y, p1.x, p1.y, cntrl.x, cntrl.y, cp.x, cp.y);
              if (ctx != null) ctx.bezierCurveTo(p1.x, p1.y, cntrl.x, cntrl.y, cp.x, cp.y);
            }
            break;
          case 'S':
          case 's':
            while (!pp.isCommandOrEnd()) {
              var curr = pp.current;
              var p1 = pp.getReflectedControlPoint();
              var cntrl = pp.getAsControlPoint();
              var cp = pp.getAsCurrentPoint();
              pp.addMarker(cp, cntrl, p1);
              bb.addBezierCurve(curr.x, curr.y, p1.x, p1.y, cntrl.x, cntrl.y, cp.x, cp.y);
              if (ctx != null) ctx.bezierCurveTo(p1.x, p1.y, cntrl.x, cntrl.y, cp.x, cp.y);
            }
            break;
          case 'Q':
          case 'q':
            while (!pp.isCommandOrEnd()) {
              var curr = pp.current;
              var cntrl = pp.getAsControlPoint();
              var cp = pp.getAsCurrentPoint();
              pp.addMarker(cp, cntrl, cntrl);
              bb.addQuadraticCurve(curr.x, curr.y, cntrl.x, cntrl.y, cp.x, cp.y);
              if (ctx != null) ctx.quadraticCurveTo(cntrl.x, cntrl.y, cp.x, cp.y);
            }
            break;
          case 'T':
          case 't':
            while (!pp.isCommandOrEnd()) {
              var curr = pp.current;
              var cntrl = pp.getReflectedControlPoint();
              pp.control = cntrl;
              var cp = pp.getAsCurrentPoint();
              pp.addMarker(cp, cntrl, cntrl);
              bb.addQuadraticCurve(curr.x, curr.y, cntrl.x, cntrl.y, cp.x, cp.y);
              if (ctx != null) ctx.quadraticCurveTo(cntrl.x, cntrl.y, cp.x, cp.y);
            }
            break;
          case 'A':
          case 'a':
            while (!pp.isCommandOrEnd()) {
              var curr = pp.current;
              var rx = pp.getScalar();
              var ry = pp.getScalar();
              var xAxisRotation = pp.getScalar() * (Math.PI / 180.0);
              var largeArcFlag = pp.getScalar();
              var sweepFlag = pp.getScalar();
              var cp = pp.getAsCurrentPoint();

              // Conversion from endpoint to center parameterization
              // http://www.w3.org/TR/SVG11/implnote.html#ArcImplementationNotes
              // x1', y1'
              var currp = new svg.Point(
                Math.cos(xAxisRotation) * (curr.x - cp.x) / 2.0 + Math.sin(xAxisRotation) * (curr.y - cp.y) / 2.0, -Math.sin(xAxisRotation) * (curr.x - cp.x) / 2.0 + Math.cos(xAxisRotation) * (curr.y - cp.y) / 2.0
              );
              // adjust radii
              var l = Math.pow(currp.x, 2) / Math.pow(rx, 2) + Math.pow(currp.y, 2) / Math.pow(ry, 2);
              if (l > 1) {
                rx *= Math.sqrt(l);
                ry *= Math.sqrt(l);
              }
              // cx', cy'
              var s = (largeArcFlag == sweepFlag ? -1 : 1) * Math.sqrt(
                ((Math.pow(rx, 2) * Math.pow(ry, 2)) - (Math.pow(rx, 2) * Math.pow(currp.y, 2)) - (Math.pow(ry, 2) * Math.pow(currp.x, 2))) /
                (Math.pow(rx, 2) * Math.pow(currp.y, 2) + Math.pow(ry, 2) * Math.pow(currp.x, 2))
              );
              if (isNaN(s)) s = 0;
              var cpp = new svg.Point(s * rx * currp.y / ry, s * -ry * currp.x / rx);
              // cx, cy
              var centp = new svg.Point(
                (curr.x + cp.x) / 2.0 + Math.cos(xAxisRotation) * cpp.x - Math.sin(xAxisRotation) * cpp.y,
                (curr.y + cp.y) / 2.0 + Math.sin(xAxisRotation) * cpp.x + Math.cos(xAxisRotation) * cpp.y
              );
              // vector magnitude
              var m = function (v) { return Math.sqrt(Math.pow(v[0], 2) + Math.pow(v[1], 2)); }
              // ratio between two vectors
              var r = function (u, v) { return (u[0] * v[0] + u[1] * v[1]) / (m(u) * m(v)) }
              // angle between two vectors
              var a = function (u, v) { return (u[0] * v[1] < u[1] * v[0] ? -1 : 1) * Math.acos(r(u, v)); }
              // initial angle
              var a1 = a([1, 0], [(currp.x - cpp.x) / rx, (currp.y - cpp.y) / ry]);
              // angle delta
              var u = [(currp.x - cpp.x) / rx, (currp.y - cpp.y) / ry];
              var v = [(-currp.x - cpp.x) / rx, (-currp.y - cpp.y) / ry];
              var ad = a(u, v);
              if (r(u, v) <= -1) ad = Math.PI;
              if (r(u, v) >= 1) ad = 0;

              // for markers
              var dir = 1 - sweepFlag ? 1.0 : -1.0;
              var ah = a1 + dir * (ad / 2.0);
              var halfWay = new svg.Point(
                centp.x + rx * Math.cos(ah),
                centp.y + ry * Math.sin(ah)
              );
              pp.addMarkerAngle(halfWay, ah - dir * Math.PI / 2);
              pp.addMarkerAngle(cp, ah - dir * Math.PI);

              bb.addPoint(cp.x, cp.y); // TODO: this is too naive, make it better
              if (ctx != null && !isNaN(a1) && !isNaN(ad)) {
                var r = rx > ry ? rx : ry;
                var sx = rx > ry ? 1 : rx / ry;
                var sy = rx > ry ? ry / rx : 1;

                ctx.translate(centp.x, centp.y);
                ctx.rotate(xAxisRotation);
                ctx.scale(sx, sy);
                ctx.arc(0, 0, r, a1, a1 + ad, 1 - sweepFlag);
                ctx.scale(1 / sx, 1 / sy);
                ctx.rotate(-xAxisRotation);
                ctx.translate(-centp.x, -centp.y);
              }
            }
            break;
          case 'Z':
          case 'z':
            if (ctx != null) {
              // only close path if it is not a straight line
              if (bb.x1 !== bb.x2 && bb.y1 !== bb.y2) {
                ctx.closePath();
              }
            }
            pp.current = pp.start;
        }
      }

      return bb;
    }

    this.getMarkers = function () {
      var points = this.PathParser.getMarkerPoints();
      var angles = this.PathParser.getMarkerAngles();

      var markers = [];
      for (var i = 0; i < points.length; i++) {
        markers.push([points[i], angles[i]]);
      }
      return markers;
    }
  }
  svg.Element.path.prototype = new svg.Element.PathElementBase;

  // pattern element
  svg.Element.pattern = function (node) {
    this.base = svg.Element.ElementBase;
    this.base(node);

    this.createPattern = function (ctx, element, parentOpacityProp) {
      var width = this.attribute('width').toPixels('x', true);
      var height = this.attribute('height').toPixels('y', true);

      // render me using a temporary svg element
      var tempSvg = new svg.Element.svg();
      tempSvg.attributes['viewBox'] = new svg.Property('viewBox', this.attribute('viewBox').value);
      tempSvg.attributes['width'] = new svg.Property('width', width + 'px');
      tempSvg.attributes['height'] = new svg.Property('height', height + 'px');
      tempSvg.attributes['transform'] = new svg.Property('transform', this.attribute('patternTransform').value);
      tempSvg.children = this.children;

      var c = createCanvas(width, height);
      var cctx = c.getContext('2d');
      if (this.attribute('x').hasValue() && this.attribute('y').hasValue()) {
        cctx.translate(this.attribute('x').toPixels('x', true), this.attribute('y').toPixels('y', true));
      }

      if (parentOpacityProp.hasValue()) {
        this.styles['fill-opacity'] = parentOpacityProp;
      } else {
        delete this.styles['fill-opacity'];
      }

      // render 3x3 grid so when we transform there's no white space on edges
      for (var x = -1; x <= 1; x++) {
        for (var y = -1; y <= 1; y++) {
          cctx.save();
          tempSvg.attributes['x'] = new svg.Property('x', x * c.width);
          tempSvg.attributes['y'] = new svg.Property('y', y * c.height);
          tempSvg.render(cctx);
          cctx.restore();
        }
      }
      var pattern = ctx.createPattern(c, 'repeat');
      return pattern;
    }
  }
  svg.Element.pattern.prototype = new svg.Element.ElementBase;

  // marker element
  svg.Element.marker = function (node) {
    this.base = svg.Element.ElementBase;
    this.base(node);

    this.baseRender = this.render;
    this.render = function (ctx, point, angle) {
      if (!point) { return; }
      ctx.translate(point.x, point.y);
      if (this.attribute('orient').valueOrDefault('auto') == 'auto') ctx.rotate(angle);
      if (this.attribute('markerUnits').valueOrDefault('strokeWidth') == 'strokeWidth') ctx.scale(ctx.lineWidth, ctx.lineWidth);
      ctx.save();

      // render me using a temporary svg element
      var tempSvg = new svg.Element.svg();
      tempSvg.attributes['viewBox'] = new svg.Property('viewBox', this.attribute('viewBox').value);
      tempSvg.attributes['refX'] = new svg.Property('refX', this.attribute('refX').value);
      tempSvg.attributes['refY'] = new svg.Property('refY', this.attribute('refY').value);
      tempSvg.attributes['width'] = new svg.Property('width', this.attribute('markerWidth').value);
      tempSvg.attributes['height'] = new svg.Property('height', this.attribute('markerHeight').value);
      tempSvg.attributes['fill'] = new svg.Property('fill', this.attribute('fill').valueOrDefault('black'));
      tempSvg.attributes['stroke'] = new svg.Property('stroke', this.attribute('stroke').valueOrDefault('none'));
      tempSvg.children = this.children;
      tempSvg.render(ctx);

      ctx.restore();
      if (this.attribute('markerUnits').valueOrDefault('strokeWidth') == 'strokeWidth') ctx.scale(1 / ctx.lineWidth, 1 / ctx.lineWidth);
      if (this.attribute('orient').valueOrDefault('auto') == 'auto') ctx.rotate(-angle);
      ctx.translate(-point.x, -point.y);
    }
  }
  svg.Element.marker.prototype = new svg.Element.ElementBase;

  // definitions element
  svg.Element.defs = function (node) {
    this.base = svg.Element.ElementBase;
    this.base(node);

    this.render = function (/* ctx */) {
      // NOOP
    }
  }
  svg.Element.defs.prototype = new svg.Element.ElementBase;

  // base for gradients
  svg.Element.GradientBase = function (node) {
    this.base = svg.Element.ElementBase;
    this.base(node);

    this.stops = [];
    for (var i = 0; i < this.children.length; i++) {
      var child = this.children[i];
      if (child.type == 'stop') this.stops.push(child);
    }

    this.getGradient = function () {
      // OVERRIDE ME!
    }

    this.gradientUnits = function () {
      return this.attribute('gradientUnits').valueOrDefault('objectBoundingBox');
    }

    this.attributesToInherit = ['gradientUnits'];

    this.inheritStopContainer = function (stopsContainer) {
      for (var i = 0; i < this.attributesToInherit.length; i++) {
        var attributeToInherit = this.attributesToInherit[i];
        if (!this.attribute(attributeToInherit).hasValue() && stopsContainer.attribute(attributeToInherit).hasValue()) {
          this.attribute(attributeToInherit, true).value = stopsContainer.attribute(attributeToInherit).value;
        }
      }
    }

    this.createGradient = function (ctx, element, parentOpacityProp) {
      var stopsContainer = this;
      if (this.getHrefAttribute().hasValue()) {
        stopsContainer = this.getHrefAttribute().getDefinition();
        this.inheritStopContainer(stopsContainer);
      }

      var addParentOpacity = function (color) {
        if (parentOpacityProp.hasValue()) {
          var p = new svg.Property('color', color);
          return p.addOpacity(parentOpacityProp).value;
        }
        return color;
      };

      var g = this.getGradient(ctx, element);
      if (g == null) return addParentOpacity(stopsContainer.stops[stopsContainer.stops.length - 1].color);
      for (var i = 0; i < stopsContainer.stops.length; i++) {
        g.addColorStop(stopsContainer.stops[i].offset, addParentOpacity(stopsContainer.stops[i].color));
      }

      if (this.attribute('gradientTransform').hasValue()) {
        // render as transformed pattern on temporary canvas
        var rootView = svg.ViewPort.viewPorts[0];

        var rect = new svg.Element.rect();
        rect.attributes['x'] = new svg.Property('x', -svg.MAX_VIRTUAL_PIXELS / 3.0);
        rect.attributes['y'] = new svg.Property('y', -svg.MAX_VIRTUAL_PIXELS / 3.0);
        rect.attributes['width'] = new svg.Property('width', svg.MAX_VIRTUAL_PIXELS);
        rect.attributes['height'] = new svg.Property('height', svg.MAX_VIRTUAL_PIXELS);

        var group = new svg.Element.g();
        group.attributes['transform'] = new svg.Property('transform', this.attribute('gradientTransform').value);
        group.children = [rect];

        var tempSvg = new svg.Element.svg();
        tempSvg.attributes['x'] = new svg.Property('x', 0);
        tempSvg.attributes['y'] = new svg.Property('y', 0);
        tempSvg.attributes['width'] = new svg.Property('width', rootView.width);
        tempSvg.attributes['height'] = new svg.Property('height', rootView.height);
        tempSvg.children = [group];
        var c = createCanvas(rootView.width, rootView.height);
        var tempCtx = c.getContext('2d');
        tempCtx.fillStyle = g;
        tempSvg.render(tempCtx);
        return tempCtx.createPattern(c, 'no-repeat');
      }

      return g;
    }
  }
  svg.Element.GradientBase.prototype = new svg.Element.ElementBase;

  // linear gradient element
  svg.Element.linearGradient = function (node) {
    this.base = svg.Element.GradientBase;
    this.base(node);

    this.attributesToInherit.push('x1');
    this.attributesToInherit.push('y1');
    this.attributesToInherit.push('x2');
    this.attributesToInherit.push('y2');

    this.getGradient = function (ctx, element) {
      var bb = this.gradientUnits() == 'objectBoundingBox' ? element.getBoundingBox(ctx) : null;

      if (!this.attribute('x1').hasValue() &&
        !this.attribute('y1').hasValue() &&
        !this.attribute('x2').hasValue() &&
        !this.attribute('y2').hasValue()) {
        this.attribute('x1', true).value = 0;
        this.attribute('y1', true).value = 0;
        this.attribute('x2', true).value = 1;
        this.attribute('y2', true).value = 0;
      }

      var x1 = (this.gradientUnits() == 'objectBoundingBox' ?
        bb.x() + bb.width() * this.attribute('x1').numValue() :
        this.attribute('x1').toPixels('x'));
      var y1 = (this.gradientUnits() == 'objectBoundingBox' ?
        bb.y() + bb.height() * this.attribute('y1').numValue() :
        this.attribute('y1').toPixels('y'));
      var x2 = (this.gradientUnits() == 'objectBoundingBox' ?
        bb.x() + bb.width() * this.attribute('x2').numValue() :
        this.attribute('x2').toPixels('x'));
      var y2 = (this.gradientUnits() == 'objectBoundingBox' ?
        bb.y() + bb.height() * this.attribute('y2').numValue() :
        this.attribute('y2').toPixels('y'));

      if (x1 == x2 && y1 == y2) return null;
      return ctx.createLinearGradient(x1, y1, x2, y2);
    }
  }
  svg.Element.linearGradient.prototype = new svg.Element.GradientBase;

  // radial gradient element
  svg.Element.radialGradient = function (node) {
    this.base = svg.Element.GradientBase;
    this.base(node);

    this.attributesToInherit.push('cx');
    this.attributesToInherit.push('cy');
    this.attributesToInherit.push('r');
    this.attributesToInherit.push('fx');
    this.attributesToInherit.push('fy');
    this.attributesToInherit.push('fr');

    this.getGradient = function (ctx, element) {
      var bb = element.getBoundingBox(ctx);

      if (!this.attribute('cx').hasValue()) this.attribute('cx', true).value = '50%';
      if (!this.attribute('cy').hasValue()) this.attribute('cy', true).value = '50%';
      if (!this.attribute('r').hasValue()) this.attribute('r', true).value = '50%';

      var cx = (this.gradientUnits() == 'objectBoundingBox' ?
        bb.x() + bb.width() * this.attribute('cx').numValue() :
        this.attribute('cx').toPixels('x'));
      var cy = (this.gradientUnits() == 'objectBoundingBox' ?
        bb.y() + bb.height() * this.attribute('cy').numValue() :
        this.attribute('cy').toPixels('y'));

      var fx = cx;
      var fy = cy;
      if (this.attribute('fx').hasValue()) {
        fx = (this.gradientUnits() == 'objectBoundingBox' ?
          bb.x() + bb.width() * this.attribute('fx').numValue() :
          this.attribute('fx').toPixels('x'));
      }
      if (this.attribute('fy').hasValue()) {
        fy = (this.gradientUnits() == 'objectBoundingBox' ?
          bb.y() + bb.height() * this.attribute('fy').numValue() :
          this.attribute('fy').toPixels('y'));
      }

      var r = (this.gradientUnits() == 'objectBoundingBox' ?
        (bb.width() + bb.height()) / 2.0 * this.attribute('r').numValue() :
        this.attribute('r').toPixels());

      var fr = this.attribute('fr').toPixels();
      return ctx.createRadialGradient(fx, fy, fr, cx, cy, r);
    }
  }
  svg.Element.radialGradient.prototype = new svg.Element.GradientBase;

  // gradient stop element
  svg.Element.stop = function (node) {
    this.base = svg.Element.ElementBase;
    this.base(node);

    this.offset = this.attribute('offset').numValue();
    if (this.offset < 0) this.offset = 0;
    if (this.offset > 1) this.offset = 1;

    var stopColor = this.style('stop-color', true);
    if (stopColor.value === '') stopColor.value = '#000';
    if (this.style('stop-opacity').hasValue()) stopColor = stopColor.addOpacity(this.style('stop-opacity'));
    this.color = stopColor.value;
  }
  svg.Element.stop.prototype = new svg.Element.ElementBase;

  // animation base element
  svg.Element.AnimateBase = function (node) {
    this.base = svg.Element.ElementBase;
    this.base(node);

    svg.Animations.push(this);

    this.duration = 0.0;
    this.begin = this.attribute('begin').toMilliseconds();
    this.maxDuration = this.begin + this.attribute('dur').toMilliseconds();

    this.getProperty = function () {
      var attributeType = this.attribute('attributeType').value;
      var attributeName = this.attribute('attributeName').value;

      if (attributeType == 'CSS') {
        return this.parent.style(attributeName, true);
      }
      return this.parent.attribute(attributeName, true);
    };

    this.initialValue = null;
    this.initialUnits = '';
    this.removed = false;

    this.calcValue = function () {
      // OVERRIDE ME!
      return '';
    }

    this.update = function (delta) {
      // set initial value
      if (this.initialValue == null) {
        this.initialValue = this.getProperty().value;
        this.initialUnits = this.getProperty().getUnits();
      }

      // if we're past the end time
      if (this.duration > this.maxDuration) {
        // loop for indefinitely repeating animations
        if (this.attribute('repeatCount').value == 'indefinite' ||
          this.attribute('repeatDur').value == 'indefinite') {
          this.duration = 0.0
        } else if (this.attribute('fill').valueOrDefault('remove') == 'freeze' && !this.frozen) {
          this.frozen = true;
          this.parent.animationFrozen = true;
          this.parent.animationFrozenValue = this.getProperty().value;
        } else if (this.attribute('fill').valueOrDefault('remove') == 'remove' && !this.removed) {
          this.removed = true;
          this.getProperty().value = this.parent.animationFrozen ? this.parent.animationFrozenValue : this.initialValue;
          return true;
        }
        return false;
      }
      this.duration = this.duration + delta;

      // if we're past the begin time
      var updated = false;
      if (this.begin < this.duration) {
        var newValue = this.calcValue(); // tween

        if (this.attribute('type').hasValue()) {
          // for transform, etc.
          var type = this.attribute('type').value;
          newValue = type + '(' + newValue + ')';
        }

        this.getProperty().value = newValue;
        updated = true;
      }

      return updated;
    }

    this.from = this.attribute('from');
    this.to = this.attribute('to');
    this.values = this.attribute('values');
    if (this.values.hasValue()) this.values.value = this.values.value.split(';');

    // fraction of duration we've covered
    this.progress = function () {
      var ret = { progress: (this.duration - this.begin) / (this.maxDuration - this.begin) };
      if (this.values.hasValue()) {
        var p = ret.progress * (this.values.value.length - 1);
        var lb = Math.floor(p),
          ub = Math.ceil(p);
        ret.from = new svg.Property('from', parseFloat(this.values.value[lb]));
        ret.to = new svg.Property('to', parseFloat(this.values.value[ub]));
        ret.progress = (p - lb) / (ub - lb);
      } else {
        ret.from = this.from;
        ret.to = this.to;
      }
      return ret;
    }
  }
  svg.Element.AnimateBase.prototype = new svg.Element.ElementBase;

  // animate element
  svg.Element.animate = function (node) {
    this.base = svg.Element.AnimateBase;
    this.base(node);

    this.calcValue = function () {
      var p = this.progress();

      // tween value linearly
      var newValue = p.from.numValue() + (p.to.numValue() - p.from.numValue()) * p.progress;
      if (this.initialUnits === '%') {
        newValue *= 100.0; // numValue() returns 0-1 whereas properties are 0-100
      }
      return newValue + this.initialUnits;
    };
  }
  svg.Element.animate.prototype = new svg.Element.AnimateBase;

  // animate color element
  svg.Element.animateColor = function (node) {
    this.base = svg.Element.AnimateBase;
    this.base(node);

    this.calcValue = function () {
      var p = this.progress();
      var from = new RGBColor(p.from.value);
      var to = new RGBColor(p.to.value);

      if (from.ok && to.ok) {
        // tween color linearly
        var r = from.r + (to.r - from.r) * p.progress;
        var g = from.g + (to.g - from.g) * p.progress;
        var b = from.b + (to.b - from.b) * p.progress;
        return 'rgb(' + parseInt(r, 10) + ',' + parseInt(g, 10) + ',' + parseInt(b, 10) + ')';
      }
      return this.attribute('from').value;
    };
  }
  svg.Element.animateColor.prototype = new svg.Element.AnimateBase;

  // animate transform element
  svg.Element.animateTransform = function (node) {
    this.base = svg.Element.AnimateBase;
    this.base(node);

    this.calcValue = function () {
      var p = this.progress();

      // tween value linearly
      var from = svg.ToNumberArray(p.from.value);
      var to = svg.ToNumberArray(p.to.value);
      var newValue = '';
      for (var i = 0; i < from.length; i++) {
        newValue += from[i] + (to[i] - from[i]) * p.progress + ' ';
      }
      return newValue;
    };
  }
  svg.Element.animateTransform.prototype = new svg.Element.animate;

  // font element
  svg.Element.font = function (node) {
    this.base = svg.Element.ElementBase;
    this.base(node);

    this.horizAdvX = this.attribute('horiz-adv-x').numValue();

    this.isRTL = false;
    this.isArabic = false;
    this.fontFace = null;
    this.missingGlyph = null;
    this.glyphs = [];
    for (var i = 0; i < this.children.length; i++) {
      var child = this.children[i];
      if (child.type == 'font-face') {
        this.fontFace = child;
        if (child.style('font-family').hasValue()) {
          svg.Definitions[child.style('font-family').value] = this;
        }
      } else if (child.type == 'missing-glyph') this.missingGlyph = child;
      else if (child.type == 'glyph') {
        if (child.arabicForm != '') {
          this.isRTL = true;
          this.isArabic = true;
          if (typeof this.glyphs[child.unicode] == 'undefined') this.glyphs[child.unicode] = [];
          this.glyphs[child.unicode][child.arabicForm] = child;
        } else {
          this.glyphs[child.unicode] = child;
        }
      }
    }

    this.render = function(/* ctx */) {
      // NO RENDER
    }
  }
  svg.Element.font.prototype = new svg.Element.ElementBase;

  // font-face element
  svg.Element.fontface = function (node) {
    this.base = svg.Element.ElementBase;
    this.base(node);

    this.ascent = this.attribute('ascent').value;
    this.descent = this.attribute('descent').value;
    this.unitsPerEm = this.attribute('units-per-em').numValue();
  }
  svg.Element.fontface.prototype = new svg.Element.ElementBase;

  // missing-glyph element
  svg.Element.missingglyph = function (node) {
    this.base = svg.Element.path;
    this.base(node);

    this.horizAdvX = 0;
  }
  svg.Element.missingglyph.prototype = new svg.Element.path;

  // glyph element
  svg.Element.glyph = function (node) {
    this.base = svg.Element.path;
    this.base(node);

    this.horizAdvX = this.attribute('horiz-adv-x').numValue();
    this.unicode = this.attribute('unicode').value;
    this.arabicForm = this.attribute('arabic-form').value;
  }
  svg.Element.glyph.prototype = new svg.Element.path;

  // text element
  svg.Element.text = function (node) {
    this.captureTextNodes = true;
    this.base = svg.Element.RenderedElementBase;
    this.base(node);

    this.baseSetContext = this.setContext;
    this.setContext = function (ctx) {
      this.baseSetContext(ctx);

      var textBaseline = this.style('dominant-baseline').toTextBaseline();
      if (textBaseline == null) textBaseline = this.style('alignment-baseline').toTextBaseline();
      if (textBaseline != null) ctx.textBaseline = textBaseline;
    }

    this.initializeCoordinates = function (ctx) {
      this.x = this.attribute('x').toPixels('x');
      this.y = this.attribute('y').toPixels('y');
      if (this.attribute('dx').hasValue()) this.x += this.attribute('dx').toPixels('x');
      if (this.attribute('dy').hasValue()) this.y += this.attribute('dy').toPixels('y');
      this.x += this.getAnchorDelta(ctx, this, 0);
    }

    this.getBoundingBox = function (ctx) {
      this.initializeCoordinates(ctx);
      var bb = null;
      for (var i = 0; i < this.children.length; i++) {
        var childBB = this.getChildBoundingBox(ctx, this, this, i);
        if (bb == null) bb = childBB;
        else bb.addBoundingBox(childBB);
      }
      return bb;
    }

    this.renderChildren = function (ctx) {
      this.initializeCoordinates(ctx);
      for (var i = 0; i < this.children.length; i++) {
        this.renderChild(ctx, this, this, i);
      }
      svg.Mouse.checkBoundingBox(this, this.getBoundingBox(ctx));
    }

    this.getAnchorDelta = function (ctx, parent, startI) {
      var textAnchor = this.style('text-anchor').valueOrDefault('start');
      if (textAnchor != 'start') {
        var width = 0;
        for (var i = startI; i < parent.children.length; i++) {
          var child = parent.children[i];
          if (i > startI && child.attribute('x').hasValue()) break; // new group
          width += child.measureTextRecursive(ctx);
        }
        return -1 * (textAnchor == 'end' ? width : width / 2.0);
      }
      return 0;
    }

    this.adjustChildCoordinates = function(ctx, textParent, parent, i) {
      var child = parent.children[i];
      if (typeof(child.measureText) !== 'function') {
        return child;
      }

      if (child.attribute('x').hasValue()) {
        child.x = child.attribute('x').toPixels('x') + textParent.getAnchorDelta(ctx, parent, i);

        // local text-anchor
        var textAnchor = child.attribute('text-anchor').valueOrDefault('start');
        if (textAnchor !== 'start') {
          var width = child.measureTextRecursive(ctx);
          child.x += -1 * (textAnchor == 'end' ? width : width / 2.0);
        }

        if (child.attribute('dx').hasValue()) child.x += child.attribute('dx').toPixels('x');
      } else {
        if (child.attribute('dx').hasValue()) textParent.x += child.attribute('dx').toPixels('x');
        child.x = textParent.x;
      }
      textParent.x = child.x + child.measureText(ctx);

      if (child.attribute('y').hasValue()) {
        child.y = child.attribute('y').toPixels('y');
        if (child.attribute('dy').hasValue()) child.y += child.attribute('dy').toPixels('y');
      } else {
        if (child.attribute('dy').hasValue()) textParent.y += child.attribute('dy').toPixels('y');
        child.y = textParent.y;
      }
      textParent.y = child.y;

      return child;
    }

    this.getChildBoundingBox = function (ctx, textParent, parent, i) {
      var child = this.adjustChildCoordinates(ctx, textParent, parent, i);
      var bb = child.getBoundingBox(ctx);

      for (var i = 0; i < child.children.length; i++) {
        var childBB = textParent.getChildBoundingBox(ctx, textParent, child, i);
        bb.addBoundingBox(childBB);
      }

      return bb;
    }

    this.renderChild = function (ctx, textParent, parent, i) {
      var child = this.adjustChildCoordinates(ctx, textParent, parent, i);
      child.render(ctx);

      for (var i = 0; i < child.children.length; i++) {
        textParent.renderChild(ctx, textParent, child, i);
      }
    }
  }
  svg.Element.text.prototype = new svg.Element.RenderedElementBase;

  // text base
  svg.Element.TextElementBase = function (node) {
    this.base = svg.Element.RenderedElementBase;
    this.base(node);

    this.getGlyph = function (font, text, i) {
      var c = text[i];
      var glyph = null;
      if (font.isArabic) {
        var arabicForm = 'isolated';
        if ((i == 0 || text[i - 1] == ' ') && i < text.length - 2 && text[i + 1] != ' ') arabicForm = 'terminal';
        if (i > 0 && text[i - 1] != ' ' && i < text.length - 2 && text[i + 1] != ' ') arabicForm = 'medial';
        if (i > 0 && text[i - 1] != ' ' && (i == text.length - 1 || text[i + 1] == ' ')) arabicForm = 'initial';
        if (typeof font.glyphs[c] != 'undefined') {
          glyph = font.glyphs[c][arabicForm];
          if (glyph == null && font.glyphs[c].type == 'glyph') glyph = font.glyphs[c];
        }
      } else {
        glyph = font.glyphs[c];
      }
      if (glyph == null) glyph = font.missingGlyph;
      return glyph;
    }

    this.renderChildren = function (ctx) {
      var customFont = this.parent.style('font-family').getDefinition();
      if (customFont != null) {
        var fontSize = this.parent.style('font-size').numValueOrDefault(svg.Font.Parse(svg.ctx.font).fontSize);
        var fontStyle = this.parent.style('font-style').valueOrDefault(svg.Font.Parse(svg.ctx.font).fontStyle);
        var text = this.getText();
        if (customFont.isRTL) text = text.split('').reverse().join('');

        var dx = svg.ToNumberArray(this.parent.attribute('dx').value);
        for (var i = 0; i < text.length; i++) {
          var glyph = this.getGlyph(customFont, text, i);
          var scale = fontSize / customFont.fontFace.unitsPerEm;
          ctx.translate(this.x, this.y);
          ctx.scale(scale, -scale);
          var lw = ctx.lineWidth;
          ctx.lineWidth = ctx.lineWidth * customFont.fontFace.unitsPerEm / fontSize;
          if (fontStyle == 'italic') ctx.transform(1, 0, .4, 1, 0, 0);
          glyph.render(ctx);
          if (fontStyle == 'italic') ctx.transform(1, 0, -.4, 1, 0, 0);
          ctx.lineWidth = lw;
          ctx.scale(1 / scale, -1 / scale);
          ctx.translate(-this.x, -this.y);

          this.x += fontSize * (glyph.horizAdvX || customFont.horizAdvX) / customFont.fontFace.unitsPerEm;
          if (typeof dx[i] != 'undefined' && !isNaN(dx[i])) {
            this.x += dx[i];
          }
        }
        return;
      }
      if (ctx.paintOrder == 'stroke') {
        if (ctx.strokeStyle != '') ctx.strokeText(svg.compressSpaces(this.getText()), this.x, this.y);
        if (ctx.fillStyle != '') ctx.fillText(svg.compressSpaces(this.getText()), this.x, this.y);
      } else {
        if (ctx.fillStyle != '') ctx.fillText(svg.compressSpaces(this.getText()), this.x, this.y);
        if (ctx.strokeStyle != '') ctx.strokeText(svg.compressSpaces(this.getText()), this.x, this.y);
      }
    }

    this.getText = function () {
      // OVERRIDE ME
    }

    this.measureTextRecursive = function (ctx) {
      var width = this.measureText(ctx);
      for (var i = 0; i < this.children.length; i++) {
        width += this.children[i].measureTextRecursive(ctx);
      }
      return width;
    }

    this.measureText = function (ctx) {
      var customFont = this.parent.style('font-family').getDefinition();
      if (customFont != null) {
        var fontSize = this.parent.style('font-size').numValueOrDefault(svg.Font.Parse(svg.ctx.font).fontSize);
        var measure = 0;
        var text = this.getText();
        if (customFont.isRTL) text = text.split('').reverse().join('');
        var dx = svg.ToNumberArray(this.parent.attribute('dx').value);
        for (var i = 0; i < text.length; i++) {
          var glyph = this.getGlyph(customFont, text, i);
          measure += (glyph.horizAdvX || customFont.horizAdvX) * fontSize / customFont.fontFace.unitsPerEm;
          if (typeof dx[i] != 'undefined' && !isNaN(dx[i])) {
            measure += dx[i];
          }
        }
        return measure;
      }

      var textToMeasure = svg.compressSpaces(this.getText());
      if (!ctx.measureText) return textToMeasure.length * 10;

      ctx.save();
      this.setContext(ctx, true);
      var width = ctx.measureText(textToMeasure).width;
      ctx.restore();
      return width;
    }

    this.getBoundingBox = function (ctx) {
      var fontSize = this.parent.style('font-size').numValueOrDefault(svg.Font.Parse(svg.ctx.font).fontSize);
      return new svg.BoundingBox(this.x, this.y - fontSize, this.x + this.measureText(ctx), this.y);
    }
  }
  svg.Element.TextElementBase.prototype = new svg.Element.RenderedElementBase;

  // tspan
  svg.Element.tspan = function (node) {
    this.captureTextNodes = true;
    this.base = svg.Element.TextElementBase;
    this.base(node);

    this.text = svg.compressSpaces(node.value || node.text || node.textContent || '');
    this.getText = function () {
      // if this node has children, then they own the text
      if (this.children.length > 0) { return ''; }
      return this.text;
    }
  }
  svg.Element.tspan.prototype = new svg.Element.TextElementBase;

  // tref
  svg.Element.tref = function (node) {
    this.base = svg.Element.TextElementBase;
    this.base(node);

    this.getText = function () {
      var element = this.getHrefAttribute().getDefinition();
      if (element != null) return element.children[0].getText();
    }
  }
  svg.Element.tref.prototype = new svg.Element.TextElementBase;

  // a element
  svg.Element.a = function (node) {
    this.base = svg.Element.TextElementBase;
    this.base(node);

    this.hasText = node.childNodes.length > 0;
    for (var i = 0; i < node.childNodes.length; i++) {
      if (node.childNodes[i].nodeType != 3) this.hasText = false;
    }

    // this might contain text
    this.text = this.hasText ? node.childNodes[0].value || node.childNodes[0].data : '';
    this.getText = function () {
      return this.text;
    }

    this.baseRenderChildren = this.renderChildren;
    this.renderChildren = function (ctx) {
      if (this.hasText) {
        // render as text element
        this.baseRenderChildren(ctx);
        var fontSize = new svg.Property('fontSize', svg.Font.Parse(svg.ctx.font).fontSize);
        svg.Mouse.checkBoundingBox(this, new svg.BoundingBox(this.x, this.y - fontSize.toPixels('y'), this.x + this.measureText(ctx), this.y));
      } else if (this.children.length > 0) {
        // render as temporary group
        var g = new svg.Element.g();
        g.children = this.children;
        g.parent = this;
        g.render(ctx);
      }
    }

    this.onclick = function () {
      windowEnv.open(this.getHrefAttribute().value);
    }

    this.onmousemove = function () {
      svg.ctx.canvas.style.cursor = 'pointer';
    }
  }
  svg.Element.a.prototype = new svg.Element.TextElementBase;

  // image element
  svg.Element.image = function (node) {
    this.base = svg.Element.RenderedElementBase;
    this.base(node);

    var href = this.getHrefAttribute().value;
    if (href == '') { return; }
    var isSvg = href.match(/\.svg$/)

    svg.Images.push(this);
    this.loaded = false;
    if (!isSvg) {
      this.img = nodeEnv ? new Canvas.Image() : doc.createElement('img');
      if (svg.opts['useCORS'] == true) { this.img.crossOrigin = 'Anonymous'; }
      var self = this;
      this.img.onload = function () { self.loaded = true; }
      this.img.onerror = function () {
        svg.log('ERROR: image "' + href + '" not found');
        self.loaded = true;
      }
      this.img.src = href;
    } else {
      this.img = svg.ajax(href);
      this.loaded = true;
    }

    this.renderChildren = function (ctx) {
      var x = this.attribute('x').toPixels('x');
      var y = this.attribute('y').toPixels('y');

      var width = this.attribute('width').toPixels('x');
      var height = this.attribute('height').toPixels('y');
      if (width == 0 || height == 0) return;

      ctx.save();
      if (isSvg) {
        ctx.drawSvg(this.img, x, y, width, height);
      } else {
        ctx.translate(x, y);
        svg.AspectRatio(ctx,
          this.attribute('preserveAspectRatio').value,
          width,
          this.img.width,
          height,
          this.img.height,
          0,
          0);
        if (self.loaded) {
          if (this.img.complete === undefined || this.img.complete) {
            ctx.drawImage(this.img, 0, 0);
          }
        }
      }
      ctx.restore();
    }

    this.getBoundingBox = function () {
      var x = this.attribute('x').toPixels('x');
      var y = this.attribute('y').toPixels('y');
      var width = this.attribute('width').toPixels('x');
      var height = this.attribute('height').toPixels('y');
      return new svg.BoundingBox(x, y, x + width, y + height);
    }
  }
  svg.Element.image.prototype = new svg.Element.RenderedElementBase;

  // group element
  svg.Element.g = function (node) {
    this.base = svg.Element.RenderedElementBase;
    this.base(node);

    this.getBoundingBox = function (ctx) {
      var bb = new svg.BoundingBox();
      for (var i = 0; i < this.children.length; i++) {
        bb.addBoundingBox(this.children[i].getBoundingBox(ctx));
      }
      return bb;
    };
  }
  svg.Element.g.prototype = new svg.Element.RenderedElementBase;

  // symbol element
  svg.Element.symbol = function (node) {
    this.base = svg.Element.RenderedElementBase;
    this.base(node);

    this.render = function (/* ctx */) {
      // NO RENDER
    };
  }
  svg.Element.symbol.prototype = new svg.Element.RenderedElementBase;

  svg.ParseExternalUrl = function(url) {
    //                                 single quotes [2]
    //                                 v           double quotes [3]
    //                                 v           v        no quotes [4]
    //                                 v           v        v
    var urlMatch = url.match(/url\(('([^']+)'|"([^"]+)"|([^'"\)]+))\)/) || [];
    return urlMatch[2] || urlMatch[3] || urlMatch[4];
  };

  // style element
  svg.Element.style = function (node) {
    this.base = svg.Element.ElementBase;
    this.base(node);

    // text, or spaces then CDATA
    var css = ''
    for (var i = 0; i < node.childNodes.length; i++) {
      css += node.childNodes[i].data;
    }
    css = css.replace(/(\/\*([^*]|[\r\n]|(\*+([^*\/]|[\r\n])))*\*+\/)|(^[\s]*\/\/.*)/gm, ''); // remove comments
    css = svg.compressSpaces(css); // replace whitespace
    var cssDefs = css.split('}');
    for (var i = 0; i < cssDefs.length; i++) {
      if (svg.trim(cssDefs[i]) != '') {
        var cssDef = cssDefs[i].split('{');
        var cssClasses = cssDef[0].split(',');
        var cssProps = cssDef[1].split(';');
        for (var j = 0; j < cssClasses.length; j++) {
          var cssClass = svg.trim(cssClasses[j]);
          if (cssClass != '') {
            var props = svg.Styles[cssClass] || {};
            for (var k = 0; k < cssProps.length; k++) {
              var prop = cssProps[k].indexOf(':');
              var name = cssProps[k].substr(0, prop);
              var value = cssProps[k].substr(prop + 1, cssProps[k].length - prop);
              if (name != null && value != null) {
                props[svg.trim(name)] = new svg.Property(svg.trim(name), svg.trim(value));
              }
            }
            svg.Styles[cssClass] = props;
            svg.StylesSpecificity[cssClass] = getSelectorSpecificity(cssClass);
            if (cssClass == '@font-face' && !nodeEnv) {
              var fontFamily = props['font-family'].value.replace(/"/g, '');
              var srcs = props['src'].value.split(',');
              for (var s = 0; s < srcs.length; s++) {
                if (srcs[s].indexOf('format("svg")') > 0) {
                  var url = svg.ParseExternalUrl(srcs[s]);
                  if (url) {
                    var doc = svg.parseXml(svg.ajax(url));
                    var fonts = doc.getElementsByTagName('font');
                    for (var f = 0; f < fonts.length; f++) {
                      var font = svg.CreateElement(fonts[f]);
                      svg.Definitions[fontFamily] = font;
                    }
                  }
                }
              }
            }
          }
        }
      }
    }
  }
  svg.Element.style.prototype = new svg.Element.ElementBase;

  // use element
  svg.Element.use = function (node) {
    this.base = svg.Element.RenderedElementBase;
    this.base(node);

    this.baseSetContext = this.setContext;
    this.setContext = function (ctx) {
      this.baseSetContext(ctx);
      if (this.attribute('x').hasValue()) ctx.translate(this.attribute('x').toPixels('x'), 0);
      if (this.attribute('y').hasValue()) ctx.translate(0, this.attribute('y').toPixels('y'));
    }

    var element = this.getHrefAttribute().getDefinition();

    this.path = function (ctx) {
      if (element != null) element.path(ctx);
    }

    this.elementTransform = function () {
      if (element != null && element.style('transform', false, true).hasValue()) {
        return new svg.Transform(element.style('transform', false, true).value);
      }
    }

    this.getBoundingBox = function (ctx) {
      if (element != null) return element.getBoundingBox(ctx);
    }

    this.renderChildren = function (ctx) {
      if (element != null) {
        var tempSvg = element;
        if (element.type == 'symbol') {
          // render me using a temporary svg element in symbol cases (http://www.w3.org/TR/SVG/struct.html#UseElement)
          tempSvg = new svg.Element.svg();
          tempSvg.type = 'svg';
          tempSvg.attributes['viewBox'] = new svg.Property('viewBox', element.attribute('viewBox').value);
          tempSvg.attributes['preserveAspectRatio'] = new svg.Property('preserveAspectRatio', element.attribute('preserveAspectRatio').value);
          tempSvg.attributes['overflow'] = new svg.Property('overflow', element.attribute('overflow').value);
          tempSvg.children = element.children;
        }
        if (tempSvg.type == 'svg') {
          // if symbol or svg, inherit width/height from me
          if (this.attribute('width').hasValue()) tempSvg.attributes['width'] = new svg.Property('width', this.attribute('width').value);
          if (this.attribute('height').hasValue()) tempSvg.attributes['height'] = new svg.Property('height', this.attribute('height').value);
        }
        var oldParent = tempSvg.parent;
        tempSvg.parent = null;
        tempSvg.render(ctx);
        tempSvg.parent = oldParent;
      }
    }
  }
  svg.Element.use.prototype = new svg.Element.RenderedElementBase;

  // mask element
  svg.Element.mask = function (node) {
    this.base = svg.Element.ElementBase;
    this.base(node);

    this.apply = function (ctx, element) {
      // render as temp svg
      var x = this.attribute('x').toPixels('x');
      var y = this.attribute('y').toPixels('y');
      var width = this.attribute('width').toPixels('x');
      var height = this.attribute('height').toPixels('y');

      if (width == 0 && height == 0) {
        var bb = new svg.BoundingBox();
        for (var i = 0; i < this.children.length; i++) {
          bb.addBoundingBox(this.children[i].getBoundingBox(ctx));
        }
        var x = Math.floor(bb.x1);
        var y = Math.floor(bb.y1);
        var width = Math.floor(bb.width());
        var height = Math.floor(bb.height());
      }

      // temporarily remove mask to avoid recursion
      var mask = element.style('mask').value;
      element.style('mask').value = '';

      var cMask = createCanvas(x + width, y + height);
      var maskCtx = cMask.getContext('2d');
      svg.SetDefaults(maskCtx);
      this.renderChildren(maskCtx);

      // convert mask to alpha with a fake node
      // TODO: refactor out apply from feColorMatrix
      var cm = new svg.Element.feColorMatrix({
        nodeType: 1,
        childNodes: [],
        attributes: [
          { nodeName: 'type', value: 'luminanceToAlpha' },
          { nodeName: 'includeOpacity', value: 'true' },
        ]
      });
      cm.apply(maskCtx, 0, 0, x + width, y + height);

      var c = createCanvas(x + width, y + height);
      var tempCtx = c.getContext('2d');
      svg.SetDefaults(tempCtx);
      element.render(tempCtx);
      tempCtx.globalCompositeOperation = 'destination-in';
      tempCtx.fillStyle = maskCtx.createPattern(cMask, 'no-repeat');
      tempCtx.fillRect(0, 0, x + width, y + height);

      ctx.fillStyle = tempCtx.createPattern(c, 'no-repeat');
      ctx.fillRect(0, 0, x + width, y + height);

      // reassign mask
      element.style('mask').value = mask;
    }

    this.render = function (/* ctx */) {
      // NO RENDER
    }
  }
  svg.Element.mask.prototype = new svg.Element.ElementBase;

  // clip element
  svg.Element.clipPath = function (node) {
    this.base = svg.Element.ElementBase;
    this.base(node);

    this.apply = function (ctx) {
      var hasContext2D = (typeof CanvasRenderingContext2D !== 'undefined');
      var oldBeginPath = ctx.beginPath;
      var oldClosePath = ctx.closePath;
      if (hasContext2D) {
        CanvasRenderingContext2D.prototype.beginPath = function () { };
        CanvasRenderingContext2D.prototype.closePath = function () { };
      }

      oldBeginPath.call(ctx);
      for (var i = 0; i < this.children.length; i++) {
        var child = this.children[i];
        if (typeof child.path != 'undefined') {
          var transform = typeof child.elementTransform != 'undefined' && child.elementTransform(); // handle <use />
          if (!transform && child.style('transform', false, true).hasValue()) {
            transform = new svg.Transform(child.style('transform', false, true).value);
          }
          if (transform) {
            transform.apply(ctx);
          }
          child.path(ctx);
          if (hasContext2D) {
            CanvasRenderingContext2D.prototype.closePath = oldClosePath;
          }
          if (transform) { transform.unapply(ctx); }
        }
      }
      oldClosePath.call(ctx);
      ctx.clip();
      if (hasContext2D) {
        CanvasRenderingContext2D.prototype.beginPath = oldBeginPath;
        CanvasRenderingContext2D.prototype.closePath = oldClosePath;
      }
    }

    this.render = function (/* ctx */) {
      // NO RENDER
    }
  }
  svg.Element.clipPath.prototype = new svg.Element.ElementBase;

  // filters
  svg.Element.filter = function (node) {
    this.base = svg.Element.ElementBase;
    this.base(node);

    this.apply = function (ctx, element) {
      // render as temp svg
      var bb = element.getBoundingBox(ctx);
      var x = Math.floor(bb.x1);
      var y = Math.floor(bb.y1);
      var width = Math.floor(bb.width());
      var height = Math.floor(bb.height());

      // temporarily remove filter to avoid recursion
      var filter = element.style('filter').value;
      element.style('filter').value = '';

      var px = 0,
        py = 0;
      for (var i = 0; i < this.children.length; i++) {
        var efd = this.children[i].extraFilterDistance || 0;
        px = Math.max(px, efd);
        py = Math.max(py, efd);
      }

      var c = createCanvas(width + 2 * px, height + 2 * py);
      var tempCtx = c.getContext('2d');
      svg.SetDefaults(tempCtx);
      tempCtx.translate(-x + px, -y + py);
      element.render(tempCtx);

      // apply filters
      for (var i = 0; i < this.children.length; i++) {
        if (typeof this.children[i].apply == 'function') {
          this.children[i].apply(tempCtx, 0, 0, width + 2 * px, height + 2 * py);
        }
      }

      // render on me
      ctx.drawImage(c, 0, 0, width + 2 * px, height + 2 * py, x - px, y - py, width + 2 * px, height + 2 * py);

      // reassign filter
      element.style('filter', true).value = filter;
    }

    this.render = function (/* ctx */) {
      // NO RENDER
    }
  }
  svg.Element.filter.prototype = new svg.Element.ElementBase;

  svg.Element.feDropShadow = function (node) {
    this.base = svg.Element.ElementBase;
    this.base(node);
    this.addStylesFromStyleDefinition();

    this.apply = function (/* ctx, x, y, width, height */) {
      // TODO: implement
    }
  }
  svg.Element.feDropShadow.prototype = new svg.Element.ElementBase;

  svg.Element.feMorphology = function (node) {
    this.base = svg.Element.ElementBase;
    this.base(node);

    this.apply = function (/* ctx, x, y, width, height */) {
      // TODO: implement
    }
  }
  svg.Element.feMorphology.prototype = new svg.Element.ElementBase;

  svg.Element.feComposite = function (node) {
    this.base = svg.Element.ElementBase;
    this.base(node);

    this.apply = function (/* ctx, x, y, width, height */) {
      // TODO: implement
    }
  }
  svg.Element.feComposite.prototype = new svg.Element.ElementBase;

  svg.Element.feColorMatrix = function (node) {
    this.base = svg.Element.ElementBase;
    this.base(node);

    var matrix = svg.ToNumberArray(this.attribute('values').value);
    switch (this.attribute('type').valueOrDefault('matrix')) { // http://www.w3.org/TR/SVG/filters.html#feColorMatrixElement
      case 'saturate':
        var s = matrix[0];
        matrix = [0.213 + 0.787 * s, 0.715 - 0.715 * s, 0.072 - 0.072 * s, 0, 0,
        0.213 - 0.213 * s, 0.715 + 0.285 * s, 0.072 - 0.072 * s, 0, 0,
        0.213 - 0.213 * s, 0.715 - 0.715 * s, 0.072 + 0.928 * s, 0, 0,
          0, 0, 0, 1, 0,
          0, 0, 0, 0, 1
        ];
        break;
      case 'hueRotate':
        var a = matrix[0] * Math.PI / 180.0;
        var c = function (m1, m2, m3) { return m1 + Math.cos(a) * m2 + Math.sin(a) * m3; };
        matrix = [c(0.213, 0.787, -0.213), c(0.715, -0.715, -0.715), c(0.072, -0.072, 0.928), 0, 0,
        c(0.213, -0.213, 0.143), c(0.715, 0.285, 0.140), c(0.072, -0.072, -0.283), 0, 0,
        c(0.213, -0.213, -0.787), c(0.715, -0.715, 0.715), c(0.072, 0.928, 0.072), 0, 0,
          0, 0, 0, 1, 0,
          0, 0, 0, 0, 1
        ];
        break;
      case 'luminanceToAlpha':
        matrix = [0, 0, 0, 0, 0,
          0, 0, 0, 0, 0,
          0, 0, 0, 0, 0,
          0.2125, 0.7154, 0.0721, 0, 0,
          0, 0, 0, 0, 1
        ];
        break;
    }

    function imGet(img, x, y, width, height, rgba) {
      return img[y * width * 4 + x * 4 + rgba];
    }

    function imSet(img, x, y, width, height, rgba, val) {
      img[y * width * 4 + x * 4 + rgba] = val;
    }

    function m(i, v) {
      var mi = matrix[i];
      return mi * (mi < 0 ? v - 255 : v);
    }

    var includeOpacity = this.attribute('includeOpacity').hasValue();
    this.apply = function (ctx, x, y, width, height) {
      // assuming x==0 && y==0 for now
      var srcData = ctx.getImageData(0, 0, width, height);
      for (var y = 0; y < height; y++) {
        for (var x = 0; x < width; x++) {
          var r = imGet(srcData.data, x, y, width, height, 0);
          var g = imGet(srcData.data, x, y, width, height, 1);
          var b = imGet(srcData.data, x, y, width, height, 2);
          var a = imGet(srcData.data, x, y, width, height, 3);
          var nr = m(0, r) + m(1, g) + m(2, b) + m(3, a) + m(4, 1);
          var ng = m(5, r) + m(6, g) + m(7, b) + m(8, a) + m(9, 1);
          var nb = m(10, r) + m(11, g) + m(12, b) + m(13, a) + m(14, 1);
          var na = m(15, r) + m(16, g) + m(17, b) + m(18, a) + m(19, 1);
          if (includeOpacity) {
            nr = ng = nb = 0;
            na *= a / 255;
          }
          imSet(srcData.data, x, y, width, height, 0, nr);
          imSet(srcData.data, x, y, width, height, 1, ng);
          imSet(srcData.data, x, y, width, height, 2, nb);
          imSet(srcData.data, x, y, width, height, 3, na);
        }
      }
      ctx.clearRect(0, 0, width, height);
      ctx.putImageData(srcData, 0, 0);
    }
  }
  svg.Element.feColorMatrix.prototype = new svg.Element.ElementBase;

  svg.Element.feGaussianBlur = function (node) {
    this.base = svg.Element.ElementBase;
    this.base(node);

    this.blurRadius = Math.floor(this.attribute('stdDeviation').numValue());
    this.extraFilterDistance = this.blurRadius;

    this.apply = function (ctx, x, y, width, height) {
      if (!StackBlur || typeof StackBlur.canvasRGBA === 'undefined') {
        svg.log('ERROR: StackBlur.js must be included for blur to work');
        return;
      }

      // StackBlur requires canvas be on document
      ctx.canvas.id = svg.UniqueId();
      if (!nodeEnv) {
        ctx.canvas.style.display = 'none';
        doc.body.appendChild(ctx.canvas);
      }
      StackBlur.canvasRGBA(ctx.canvas, x, y, width, height, this.blurRadius);
      if (!nodeEnv) {
        doc.body.removeChild(ctx.canvas);
      }
    }
  }
  svg.Element.feGaussianBlur.prototype = new svg.Element.ElementBase;

  // title element, do nothing
  svg.Element.title = function (/* node */) { }
  svg.Element.title.prototype = new svg.Element.ElementBase;

  // desc element, do nothing
  svg.Element.desc = function (/* node */) { }
  svg.Element.desc.prototype = new svg.Element.ElementBase;

  svg.Element.MISSING = function (node) {
    svg.log('ERROR: Element \'' + node.nodeName + '\' not yet implemented.');
  }
  svg.Element.MISSING.prototype = new svg.Element.ElementBase;

  // element factory
  svg.CreateElement = function (node) {
    var className = node.nodeName.replace(/^[^:]+:/, ''); // remove namespace
    className = className.replace(/\-/g, ''); // remove dashes
    var e = null;
    if (typeof svg.Element[className] != 'undefined') {
      e = new svg.Element[className](node);
    } else {
      e = new svg.Element.MISSING(node);
    }

    e.type = node.nodeName;
    return e;
  }

  // load from url
  svg.load = function (ctx, url) {
    svg.loadXml(ctx, svg.ajax(url));
  }

  // load from xml
  svg.loadXml = function (ctx, xml) {
    svg.loadXmlDoc(ctx, svg.parseXml(xml));
  }

  svg.loadXmlDoc = function (ctx, dom) {
    svg.init(ctx);

    var mapXY = function (p) {
      var e = ctx.canvas;
      while (e) {
        p.x -= e.offsetLeft;
        p.y -= e.offsetTop;
        e = e.offsetParent;
      }
      if (windowEnv.scrollX) p.x += windowEnv.scrollX;
      if (windowEnv.scrollY) p.y += windowEnv.scrollY;
      return p;
    }

    // bind mouse
    if (svg.opts['ignoreMouse'] != true) {
      ctx.canvas.onclick = function (e) {
        var p = mapXY(new svg.Point(e != null ? e.clientX : event.clientX, e != null ? e.clientY : event.clientY));
        svg.Mouse.onclick(p.x, p.y);
      };
      ctx.canvas.onmousemove = function (e) {
        var p = mapXY(new svg.Point(e != null ? e.clientX : event.clientX, e != null ? e.clientY : event.clientY));
        svg.Mouse.onmousemove(p.x, p.y);
      };
    }

    var e = svg.CreateElement(dom.documentElement);
    e.root = true;
    e.addStylesFromStyleDefinition();

    // render loop
    var isFirstRender = true;
    var draw = function () {
      svg.ViewPort.Clear();
      if (ctx.canvas.parentNode) {
        svg.ViewPort.SetCurrent(ctx.canvas.parentNode.clientWidth, ctx.canvas.parentNode.clientHeight);
      } else {
        svg.ViewPort.SetCurrent(defaultClientWidth, defaultClientHeight);
      }

      if (svg.opts['ignoreDimensions'] != true && (isFirstRender || (svg.opts['scaleWidth'] == null && svg.opts['scaleHeight'] == null))) {
        // set canvas size
        if (e.style('width').hasValue()) {
          ctx.canvas.width = e.style('width').toPixels('x');
          if (ctx.canvas.style) { ctx.canvas.style.width = ctx.canvas.width + 'px'; }
        }
        if (e.style('height').hasValue()) {
          ctx.canvas.height = e.style('height').toPixels('y');
          if (ctx.canvas.style) { ctx.canvas.style.height = ctx.canvas.height + 'px'; }
        }
      }
      var cWidth = ctx.canvas.clientWidth || ctx.canvas.width;
      var cHeight = ctx.canvas.clientHeight || ctx.canvas.height;
      if (svg.opts['ignoreDimensions'] == true && e.style('width').hasValue() && e.style('height').hasValue()) {
        cWidth = e.style('width').toPixels('x');
        cHeight = e.style('height').toPixels('y');
      }
      svg.ViewPort.SetCurrent(cWidth, cHeight);

      if (svg.opts['offsetX'] != null) e.attribute('x', true).value = svg.opts['offsetX'];
      if (svg.opts['offsetY'] != null) e.attribute('y', true).value = svg.opts['offsetY'];
      if (svg.opts['scaleWidth'] != null || svg.opts['scaleHeight'] != null) {
        var xRatio = null,
          yRatio = null,
          viewBox = svg.ToNumberArray(e.attribute('viewBox').value);

        if (svg.opts['scaleWidth'] != null) {
          if (e.attribute('width').hasValue()) xRatio = e.attribute('width').toPixels('x') / svg.opts['scaleWidth'];
          else if (!isNaN(viewBox[2])) xRatio = viewBox[2] / svg.opts['scaleWidth'];
        }

        if (svg.opts['scaleHeight'] != null) {
          if (e.attribute('height').hasValue()) yRatio = e.attribute('height').toPixels('y') / svg.opts['scaleHeight'];
          else if (!isNaN(viewBox[3])) yRatio = viewBox[3] / svg.opts['scaleHeight'];
        }

        if (xRatio == null) { xRatio = yRatio; }
        if (yRatio == null) { yRatio = xRatio; }

        e.attribute('width', true).value = svg.opts['scaleWidth'];
        e.attribute('height', true).value = svg.opts['scaleHeight'];
        e.style('transform', true, true).value += ' scale(' + (1.0 / xRatio) + ',' + (1.0 / yRatio) + ')';
      }

      // clear and render
      if (svg.opts['ignoreClear'] != true) {
        ctx.clearRect(0, 0, cWidth, cHeight);
      }
      e.render(ctx);
      if (isFirstRender) {
        isFirstRender = false;
        if (typeof svg.opts['renderCallback'] == 'function') svg.opts['renderCallback'](dom);
      }
    }

    var waitingForImages = true;
    if (svg.ImagesLoaded()) {
      waitingForImages = false;
      draw();
    }
    if (!nodeEnv || opts['enableRedraw']) {
      //In node, in the most cases, we don't need the animation listener.
      svg.intervalID = setInterval(function () {
        var needUpdate = false;

        if (waitingForImages && svg.ImagesLoaded()) {
          waitingForImages = false;
          needUpdate = true;
        }

        // need update from mouse events?
        if (svg.opts['ignoreMouse'] != true) {
          needUpdate = needUpdate || svg.Mouse.hasEvents();
        }

        // need update from animations?
        if (svg.opts['ignoreAnimation'] != true) {
          for (var i = 0; i < svg.Animations.length; i++) {
            var needAnimationUpdate = svg.Animations[i].update(1000 / svg.FRAMERATE);
            needUpdate = needUpdate || needAnimationUpdate;
          }
        }

        // need update from redraw?
        if (typeof svg.opts['forceRedraw'] == 'function') {
          if (svg.opts['forceRedraw']() == true) needUpdate = true;
        }

        // render if needed
        if (needUpdate) {
          draw();
          svg.Mouse.runEvents(); // run and clear our events
        }
      }, 1000 / svg.FRAMERATE);
    }
  }

  svg.stop = function () {
    if (svg.intervalID) {
      clearInterval(svg.intervalID);
    }
  }

  svg.Mouse = new (function () {
    this.events = [];
    this.hasEvents = function () { return this.events.length != 0; }

    this.onclick = function (x, y) {
      this.events.push({
        type: 'onclick',
        x: x,
        y: y,
        run: function (e) { if (e.onclick) e.onclick(); }
      });
    }

    this.onmousemove = function (x, y) {
      this.events.push({
        type: 'onmousemove',
        x: x,
        y: y,
        run: function (e) { if (e.onmousemove) e.onmousemove(); }
      });
    }

    this.eventElements = [];

    this.checkPath = function (element, ctx) {
      for (var i = 0; i < this.events.length; i++) {
        var e = this.events[i];
        if (ctx.isPointInPath && ctx.isPointInPath(e.x, e.y)) this.eventElements[i] = element;
      }
    }

    this.checkBoundingBox = function (element, bb) {
      if (!bb) {
        return;
      }

      for (var i = 0; i < this.events.length; i++) {
        var e = this.events[i];
        if (bb.isPointInBox(e.x, e.y)) this.eventElements[i] = element;
      }
    }

    this.runEvents = function () {
      svg.ctx.canvas.style.cursor = '';

      for (var i = 0; i < this.events.length; i++) {
        var e = this.events[i];
        var element = this.eventElements[i];
        while (element) {
          e.run(element);
          element = element.parent;
        }
      }

      // done running, clear
      this.events = [];
      this.eventElements = [];
    }
  });

  return svg;
}

if (typeof CanvasRenderingContext2D != 'undefined') {
  CanvasRenderingContext2D.prototype.drawSvg = function (s, dx, dy, dw, dh, opts) {
    var cOpts = {
      ignoreMouse: true,
      ignoreAnimation: true,
      ignoreDimensions: true,
      ignoreClear: true,
      offsetX: dx,
      offsetY: dy,
      scaleWidth: dw,
      scaleHeight: dh
    }

    for (var prop in opts) {
      if (opts.hasOwnProperty(prop)) {
        cOpts[prop] = opts[prop];
      }
    }
    canvg(this.canvas, s, cOpts);
  }
}

// for tests
canvg._build = build;

module.exports = canvg;