/*
 * canvg.js - Javascript SVG parser and renderer on Canvas
 * MIT Licensed 
 * Gabe Lerner (gabelerner@gmail.com)
 * http://code.google.com/p/canvg/
 *
 * Requires: rgbcolor.js - http://www.phpied.com/rgb-color-parser-in-javascript/
 */
if(!window.console) {
  window.console = {};
  window.console.log = function(str) {};
  window.console.dir = function(str) {};
}

// <3 IE
if(!Array.indexOf){
  Array.prototype.indexOf = function(obj){
    for(var i=0; i<this.length; i++){
      if(this[i]==obj){
        return i;
      }
    }
    return -1;
  }
}

(function(){
  // canvg(target, s)
  // target: canvas element or the id of a canvas element
  // s: svg string or url to svg file
  // opts: optional hash of options
  //     ignoreMouse: true => ignore mouse events
  //     ignoreAnimation: true => ignore animations
  //     renderCallback: function => will call the function after the first render is completed
  //     forceRedraw: function => will call the function on every frame, if it returns true, will redraw
  this.canvg = function (target, s, opts) {
    if (typeof target == 'string') {
      target = document.getElementById(target);
    }
    
    // reuse class per canvas
    var svg;
    if (target.svg == null) {
      svg = build();
      target.svg = svg;
    }
    else {
      svg = target.svg;
      svg.stop();
    }
    svg.opts = opts;
    
    var ctx = target.getContext('2d');
    if (s.substr(0,1) == '<') {
      // load from xml string
      svg.loadXml(ctx, s);
    }
    else {
      // load from url
      svg.load(ctx, s);
    }
  }

  function build() {
    var svg = { };
    
    svg.FRAMERATE = 30;
    
    // globals
    svg.init = function(ctx) {
      svg.Definitions = {};
      svg.Styles = {};
      svg.Animations = [];
      svg.Images = [];
      svg.ctx = ctx;
      svg.ViewPort = new (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 spaces
    svg.compressSpaces = function(s) { return s.replace(/[\s\r\t\n]+/gm,' '); }
    
    // ajax
    svg.ajax = function(url) {
      var AJAX;
      if(window.XMLHttpRequest){AJAX=new 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 (window.DOMParser)
      {
        var parser = new 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;
      
      this.hasValue = function() {
        return (this.value != null && this.value != '');
      }
              
      // return the numerical value of the property
      this.numValue = function() {
        if (!this.hasValue()) return 0;
        
        var n = parseFloat(this.value);
        if ((this.value + '').match(/%$/)) {
          n = n / 100.0;
        }
        return n;
      }
      
      this.valueOrDefault = function(def) {
        if (this.hasValue()) return this.value;
        return def;
      }
      
      this.numValueOrDefault = function(def) {
        if (this.hasValue()) return this.numValue();
        return def;
      }
      
      /* EXTENSIONS */
      var that = this;
      
      // color extensions
      this.Color = {
        // augment the current color value with the opacity
        addOpacity: function(opacity) {
          var newValue = that.value;
          if (opacity != null && opacity != '') {
            var color = new RGBColor(that.value);
            if (color.ok) {
              newValue = 'rgba(' + color.r + ', ' + color.g + ', ' + color.b + ', ' + opacity + ')';
            }
          }
          return new svg.Property(that.name, newValue);
        }
      }
      
      // definition extensions
      this.Definition = {
        // get the definition from the definitions table
        getDefinition: function() {
          var name = that.value.replace(/^(url\()?#([^\)]+)\)?$/, '$2');
          return svg.Definitions[name];
        },
        
        isUrl: function() {
          return that.value.indexOf('url(') == 0
        },
        
        getFillStyle: function(e) {
          var def = this.getDefinition();
          
          // gradient
          if (def != null && def.createGradient) {
            return def.createGradient(svg.ctx, e);
          }
          
          // pattern
          if (def != null && def.createPattern) {
            return def.createPattern(svg.ctx, e);
          }
          
          return null;
        }
      }
      
      // length extensions
      this.Length = {
        DPI: function(viewPort) {
          return 96.0; // TODO: compute?
        },
        
        EM: function(viewPort) {
          var em = 12;
          
          var fontSize = new svg.Property('fontSize', svg.Font.Parse(svg.ctx.font).fontSize);
          if (fontSize.hasValue()) em = fontSize.Length.toPixels(viewPort);
          
          return em;
        },
      
        // get the length as pixels
        toPixels: function(viewPort) {
          if (!that.hasValue()) return 0;
          var s = that.value+'';
          if (s.match(/em$/)) return that.numValue() * this.EM(viewPort);
          if (s.match(/ex$/)) return that.numValue() * this.EM(viewPort) / 2.0;
          if (s.match(/px$/)) return that.numValue();
          if (s.match(/pt$/)) return that.numValue() * 1.25;
          if (s.match(/pc$/)) return that.numValue() * 15;
          if (s.match(/cm$/)) return that.numValue() * this.DPI(viewPort) / 2.54;
          if (s.match(/mm$/)) return that.numValue() * this.DPI(viewPort) / 25.4;
          if (s.match(/in$/)) return that.numValue() * this.DPI(viewPort);
          if (s.match(/%$/)) return that.numValue() * svg.ViewPort.ComputeSize(viewPort);
          return that.numValue();
        }
      }
      
      // time extensions
      this.Time = {
        // get the time as milliseconds
        toMilliseconds: function() {
          if (!that.hasValue()) return 0;
          var s = that.value+'';
          if (s.match(/s$/)) return that.numValue() * 1000;
          if (s.match(/ms$/)) return that.numValue();
          return that.numValue();
        }
      }
      
      // angle extensions
      this.Angle = {
        // get the angle as radians
        toRadians: function() {
          if (!that.hasValue()) return 0;
          var s = that.value+'';
          if (s.match(/deg$/)) return that.numValue() * (Math.PI / 180.0);
          if (s.match(/grad$/)) return that.numValue() * (Math.PI / 200.0);
          if (s.match(/rad$/)) return that.numValue();
          return that.numValue() * (Math.PI / 180.0);
        }
      }
    }
    
    // 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);
        return { 
          fontFamily: fontFamily || f.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 = svg.trim(svg.compressSpaces((s || '').replace(/,/g, ' '))).split(' ');
      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;
      
      this.angleTo = function(p) {
        return Math.atan2(p.y - this.y, p.x - this.x);
      }
      
      this.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.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 (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.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.Angle.toRadians());
          ctx.translate(-this.cx, -this.cy);
        }
        this.applyToPoint = function(p) {
          var a = this.angle.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.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.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.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.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.applyToPoint = function(p) {
        for (var i=0; i<this.transforms.length; i++) {
          this.transforms[i].applyToPoint(p);
        }
      }
      
      var data = v.split(/\s(?=[a-z])/);
      for (var i=0; i<data.length; i++) {
        var type = data[i].split('(')[0];
        var s = data[i].split('(')[1].replace(')','');
        var transform = eval('new this.Type.' + type + '(s)');
        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.Length.toPixels('x'), -scaleMin * refY.Length.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 (meetOrSlice == 'meet') ctx.scale(scaleMin, scaleMin); 
      if (meetOrSlice == 'slice') ctx.scale(scaleMax, scaleMax);   
      
      // translate
      ctx.translate(minX == null ? 0 : -minX, minY == null ? 0 : -minY);      
    }
    
    // elements
    svg.Element = {}
    
    svg.Element.ElementBase = function(node) {  
      this.attributes = {};
      this.styles = {};
      this.children = [];
      
      // get or create attribute
      this.attribute = function(name, createIfNotExists) {
        var a = this.attributes[name];
        if (a != null) return a;
              
        a = new svg.Property(name, '');
        if (createIfNotExists == true) this.attributes[name] = a;
        return a;
      }
      
      // get or create style
      this.style = function(name, createIfNotExists) {
        var s = this.styles[name];
        if (s != null) return s;
        
        var a = this.attribute(name);
        if (a != null && a.hasValue()) {
          return a;
        }
          
        s = new svg.Property(name, '');
        if (createIfNotExists == true) this.styles[name] = s;
        return s;
      }
      
      // base render
      this.render = function(ctx) {
        // don't render display=none
        if (this.attribute('display').value == 'none') return;
      
        ctx.save();
        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;
        this.children.push(child);      
      }
        
      if (node != null && node.nodeType == 1) { //ELEMENT_NODE
        // 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
        }
        
        // add attributes
        for (var i=0; i<node.attributes.length; i++) {
          var attribute = node.attributes[i];
          this.attributes[attribute.nodeName] = new svg.Property(attribute.nodeName, attribute.nodeValue);
        }
                    
        // add tag styles
        var styles = svg.Styles[this.type];
        if (styles != null) {
          for (var name in styles) {
            this.styles[name] = styles[name];
          }
        }          
        
        // add class styles
        if (this.attribute('class').hasValue()) {
          var classes = svg.compressSpaces(this.attribute('class').value).split(' ');
          for (var j=0; j<classes.length; j++) {
            styles = svg.Styles['.'+classes[j]];
            if (styles != null) {
              for (var name in styles) {
                this.styles[name] = styles[name];
              }
            }
          }
        }
        
        // 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;
          }
        }
      }
    }
    
    svg.Element.RenderedElementBase = function(node) {
      this.base = svg.Element.ElementBase;
      this.base(node);
      
      this.setContext = function(ctx) {
        // fill
        if (this.style('fill').Definition.isUrl()) {
          var fs = this.style('fill').Definition.getFillStyle(this);
          if (fs != null) ctx.fillStyle = fs;
        }
        else if (this.style('fill').hasValue()) {
          var fillStyle = this.style('fill');
          if (this.style('fill-opacity').hasValue()) fillStyle = fillStyle.Color.addOpacity(this.style('fill-opacity').value);
          ctx.fillStyle = (fillStyle.value == 'none' ? 'rgba(0,0,0,0)' : fillStyle.value);
        }
                  
        // stroke
        if (this.style('stroke').Definition.isUrl()) {
          var fs = this.style('stroke').Definition.getFillStyle(this);
          if (fs != null) ctx.strokeStyle = fs;
        }
        else if (this.style('stroke').hasValue()) {
          var strokeStyle = this.style('stroke');
          if (this.style('stroke-opacity').hasValue()) strokeStyle = strokeStyle.Color.addOpacity(this.style('stroke-opacity').value);
          ctx.strokeStyle = (strokeStyle.value == 'none' ? 'rgba(0,0,0,0)' : strokeStyle.value);
        }
        if (this.style('stroke-width').hasValue()) ctx.lineWidth = this.style('stroke-width').Length.toPixels();
        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;

        // 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').Length.toPixels() + 'px' : '', 
            this.style('font-family').value).toString();
        }
        
        // transform
        if (this.attribute('transform').hasValue()) { 
          var transform = new svg.Transform(this.attribute('transform').value);
          transform.apply(ctx);
        }
        
        // clip
        if (this.attribute('clip-path').hasValue()) {
          var clip = this.attribute('clip-path').Definition.getDefinition();
          if (clip != null) clip.apply(ctx);
        }
        
        // opacity
        if (this.style('opacity').hasValue()) {
          ctx.globalAlpha = this.style('opacity').numValue();
        }
      }    
    }
    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 != '') ctx.fill();
        if (ctx.strokeStyle != '') ctx.stroke();
        
        var markers = this.getMarkers();
        if (markers != null) {
          if (this.attribute('marker-start').Definition.isUrl()) {
            var marker = this.attribute('marker-start').Definition.getDefinition();
            marker.render(ctx, markers[0][0], markers[0][1]);
          }
          if (this.attribute('marker-mid').Definition.isUrl()) {
            var marker = this.attribute('marker-mid').Definition.getDefinition();
            for (var i=1;i<markers.length-1;i++) {
              marker.render(ctx, markers[i][0], markers[i][1]);
            }
          }
          if (this.attribute('marker-end').Definition.isUrl()) {
            var marker = this.attribute('marker-end').Definition.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 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) {
        this.baseSetContext(ctx);
        
        // create new view port
        if (this.attribute('x').hasValue() && this.attribute('y').hasValue()) {
          ctx.translate(this.attribute('x').Length.toPixels('x'), this.attribute('y').Length.toPixels('y'));
        }
        
        var width = svg.ViewPort.width();
        var height = svg.ViewPort.height();
        if (this.attribute('width').hasValue() && this.attribute('height').hasValue()) {
          width = this.attribute('width').Length.toPixels('x');
          height = this.attribute('height').Length.toPixels('y');
          
          var x = 0;
          var y = 0;
          if (this.attribute('refX').hasValue() && this.attribute('refY').hasValue()) {
            x = -this.attribute('refX').Length.toPixels('x');
            y = -this.attribute('refY').Length.toPixels('y');
          }
          
          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]);            
        }        
        
        // initial values
        ctx.strokeStyle = 'rgba(0,0,0,0)';
        ctx.lineCap = 'butt';
        ctx.lineJoin = 'miter';
        ctx.miterLimit = 4;
      }
    }
    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').Length.toPixels('x');
        var y = this.attribute('y').Length.toPixels('y');
        var width = this.attribute('width').Length.toPixels('x');
        var height = this.attribute('height').Length.toPixels('y');
        var rx = this.attribute('rx').Length.toPixels('x');
        var ry = this.attribute('ry').Length.toPixels('y');
        if (this.attribute('rx').hasValue() && !this.attribute('ry').hasValue()) ry = rx;
        if (this.attribute('ry').hasValue() && !this.attribute('rx').hasValue()) rx = ry;
        
        if (ctx != null) {
          ctx.beginPath();
          ctx.moveTo(x + rx, y);
          ctx.lineTo(x + width - rx, y);
          ctx.quadraticCurveTo(x + width, y, x + width, y + ry)
          ctx.lineTo(x + width, y + height - ry);
          ctx.quadraticCurveTo(x + width, y + height, x + width - rx, y + height)
          ctx.lineTo(x + rx, y + height);
          ctx.quadraticCurveTo(x, y + height, x, y + height - ry)
          ctx.lineTo(x, y + ry);
          ctx.quadraticCurveTo(x, 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').Length.toPixels('x');
        var cy = this.attribute('cy').Length.toPixels('y');
        var r = this.attribute('r').Length.toPixels();
      
        if (ctx != null) {
          ctx.beginPath();
          ctx.arc(cx, cy, r, 0, Math.PI * 2, true); 
          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').Length.toPixels('x');
        var ry = this.attribute('ry').Length.toPixels('y');
        var cx = this.attribute('cx').Length.toPixels('x');
        var cy = this.attribute('cy').Length.toPixels('y');
        
        if (ctx != null) {
          ctx.beginPath();
          ctx.moveTo(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.bezierCurveTo(cx - rx, cy - (KAPPA * ry), cx - (KAPPA * rx), cy - ry, cx, cy - ry);
          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').Length.toPixels('x'), this.attribute('y1').Length.toPixels('y')),
          new svg.Point(this.attribute('x2').Length.toPixels('x'), this.attribute('y2').Length.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])]);
        }
        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: floating points, convert to real lexer based on http://www.w3.org/TR/SVG11/paths.html#PathDataBNF
      d = d.replace(/,/gm,' '); // get rid of all commas
      d = d.replace(/([A-Za-z])([A-Za-z])/gm,'$1 $2'); // separate commands from commands
      d = d.replace(/([A-Za-z])([A-Za-z])/gm,'$1 $2'); // separate commands from commands
      d = d.replace(/([A-Za-z])([^\s])/gm,'$1 $2'); // separate commands from points
      d = d.replace(/([^\s])([A-Za-z])/gm,'$1 $2'); // separate commands from points
      d = d.replace(/([0-9])([+\-])/gm,'$1 $2'); // separate digits when no comma
      d = d.replace(/(\.[0-9]*)(\.)/gm,'$1 $2'); // separate digits when no 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.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() {
          return this.command == this.command.toLowerCase();
        }
              
        this.getToken = function() {
          this.i = this.i + 1;
          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') {
            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.x;
            p.y = this.current.y + p.y;
          }
          return p;
        }
        
        this.addMarker = function(p, from) {
          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();
          if (pp.command.toUpperCase() == 'M') {
            var p = pp.getAsCurrentPoint();
            pp.addMarker(p);
            bb.addPoint(p.x, p.y);
            if (ctx != null) ctx.moveTo(p.x, p.y);
            while (!pp.isCommandOrEnd()) {
              var p = pp.getAsCurrentPoint();
              pp.addMarker(p);
              bb.addPoint(p.x, p.y);
              if (ctx != null) ctx.lineTo(p.x, p.y);
            }
          }
          else if (pp.command.toUpperCase() == '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);
            }
          }
          else if (pp.command.toUpperCase() == '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);
            }
          }
          else if (pp.command.toUpperCase() == '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);
            }
          }
          else if (pp.command.toUpperCase() == 'C') {
            while (!pp.isCommandOrEnd()) {
              var curr = pp.current;
              var p1 = pp.getPoint();
              var cntrl = pp.getAsControlPoint();
              var cp = pp.getAsCurrentPoint();
              pp.addMarker(cp, cntrl);
              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);
            }
          }
          else if (pp.command.toUpperCase() == 'S') {
            while (!pp.isCommandOrEnd()) {
              var curr = pp.current;
              var p1 = pp.getReflectedControlPoint();
              var cntrl = pp.getAsControlPoint();
              var cp = pp.getAsCurrentPoint();
              pp.addMarker(cp, cntrl);
              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);
            }        
          }          
          else if (pp.command.toUpperCase() == 'Q') {
            while (!pp.isCommandOrEnd()) {
              var curr = pp.current;
              var cntrl = pp.getAsControlPoint();
              var cp = pp.getAsCurrentPoint();
              pp.addMarker(cp, 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);
            }
          }          
          else if (pp.command.toUpperCase() == 'T') {
            while (!pp.isCommandOrEnd()) {
              var curr = pp.current;
              var cntrl = pp.getReflectedControlPoint();
              pp.control = cntrl;
              var cp = pp.getAsCurrentPoint();
              pp.addMarker(cp, 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);
            }          
          }
          else if (pp.command.toUpperCase() == '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;
              
              if (sweepFlag == 0 && ad > 0) ad = ad - 2 * Math.PI;
              if (sweepFlag == 1 && ad < 0) ad = ad + 2 * Math.PI;
              
              // for markers
              var halfWay = new svg.Point(
                centp.x - rx * Math.cos((a1 + ad) / 2),
                centp.y - ry * Math.sin((a1 + ad) / 2)
              );
              pp.addMarkerAngle(halfWay, (a1 + ad) / 2 + (sweepFlag == 0 ? 1 : -1) * Math.PI / 2);
              pp.addMarkerAngle(cp, ad + (sweepFlag == 0 ? 1 : -1) * Math.PI / 2);
                            
              bb.addPoint(cp.x, cp.y); // TODO: this is too naive, make it better
              if (ctx != null) {
                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);
              }
            }
          }
          else if (pp.command.toUpperCase() == 'Z') {
            if (ctx != null) ctx.closePath();
          }
        }
              
        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) {
        // 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['x'] = new svg.Property('x', this.attribute('x').value);
        tempSvg.attributes['y'] = new svg.Property('y', this.attribute('y').value);
        tempSvg.attributes['width'] = new svg.Property('width', this.attribute('width').value);
        tempSvg.attributes['height'] = new svg.Property('height', this.attribute('height').value);
        tempSvg.children = this.children;
        
        var c = document.createElement('canvas');
        c.width = this.attribute('width').Length.toPixels();
        c.height = this.attribute('height').Length.toPixels();
        tempSvg.render(c.getContext('2d'));    
        return ctx.createPattern(c, 'repeat');
      }
    }
    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) {
        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.gradientUnits = this.attribute('gradientUnits').valueOrDefault('objectBoundingBox');
      
      this.stops = [];      
      for (var i=0; i<this.children.length; i++) {
        var child = this.children[i];
        this.stops.push(child);
      }  
      
      this.getGradient = function() {
        // OVERRIDE ME!
      }      

      this.createGradient = function(ctx, element) {
        var stopsContainer = this;
        if (this.attribute('xlink:href').hasValue()) {
          stopsContainer = this.attribute('xlink:href').Definition.getDefinition();
        }
      
        var g = this.getGradient(ctx, element);
        for (var i=0; i<stopsContainer.stops.length; i++) {
          g.addColorStop(stopsContainer.stops[i].offset, stopsContainer.stops[i].color);
        }
        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.getGradient = function(ctx, element) {
        var bb = element.getBoundingBox();
        
        var x1 = (this.gradientUnits == 'objectBoundingBox' 
          ? bb.x() + bb.width() * this.attribute('x1').numValue() 
          : this.attribute('x1').Length.toPixels('x'));
        var y1 = (this.gradientUnits == 'objectBoundingBox' 
          ? bb.y() + bb.height() * this.attribute('y1').numValue()
          : this.attribute('y1').Length.toPixels('y'));
        var x2 = (this.gradientUnits == 'objectBoundingBox' 
          ? bb.x() + bb.width() * this.attribute('x2').numValue()
          : this.attribute('x2').Length.toPixels('x'));
        var y2 = (this.gradientUnits == 'objectBoundingBox' 
          ? bb.y() + bb.height() * this.attribute('y2').numValue()
          : this.attribute('y2').Length.toPixels('y'));
        
        var p1 = new svg.Point(x1, y1);
        var p2 = new svg.Point(x2, y2);
        if (this.attribute('gradientTransform').hasValue()) { 
          var transform = new svg.Transform(this.attribute('gradientTransform').value);
          transform.applyToPoint(p1);
          transform.applyToPoint(p2);
        }
        
        return ctx.createLinearGradient(p1.x, p1.y, p2.x, p2.y);
      }
    }
    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.getGradient = function(ctx, element) {
        var bb = element.getBoundingBox();
        
        var cx = (this.gradientUnits == 'objectBoundingBox' 
          ? bb.x() + bb.width() * this.attribute('cx').numValue() 
          : this.attribute('cx').Length.toPixels('x'));
        var cy = (this.gradientUnits == 'objectBoundingBox' 
          ? bb.y() + bb.height() * this.attribute('cy').numValue() 
          : this.attribute('cy').Length.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').Length.toPixels('x'));
        }
        if (this.attribute('fy').hasValue()) {
          fy = (this.gradientUnits == 'objectBoundingBox' 
          ? bb.y() + bb.height() * this.attribute('fy').numValue() 
          : this.attribute('fy').Length.toPixels('y'));
        }
        
        var r = (this.gradientUnits == 'objectBoundingBox' 
          ? (bb.width() + bb.height()) / 2.0 * this.attribute('r').numValue()
          : this.attribute('r').Length.toPixels());
        
        var c = new svg.Point(cx, cy);
        var f = new svg.Point(fx, fy);
        if (this.attribute('gradientTransform').hasValue()) { 
          var transform = new svg.Transform(this.attribute('gradientTransform').value);
          transform.applyToPoint(c);
          transform.applyToPoint(f);
        }        
        
        return ctx.createRadialGradient(f.x, f.y, 0, c.x, c.y, 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();
      
      var stopColor = this.style('stop-color');
      if (this.style('stop-opacity').hasValue()) stopColor = stopColor.Color.addOpacity(this.style('stop-opacity').value);
      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').Time.toMilliseconds();
      this.maxDuration = this.begin + this.attribute('dur').Time.toMilliseconds();

      this.calcValue = function() {
        // OVERRIDE ME!
        return '';
      }
      
      this.update = function(delta) {      
        // if we're past the end time
        if (this.duration > this.maxDuration) {
          // loop for indefinitely repeating animations
          if (this.attribute('repeatCount').value == 'indefinite') {
            this.duration = 0.0
          }
          else {
            return false; // no updates made
          }
        }      
        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
          var attributeType = this.attribute('attributeType').value;
          var attributeName = this.attribute('attributeName').value;
          
          if (this.parent != null) {
            if (attributeType == 'CSS') {
              this.parent.style(attributeName, true).value = newValue;
            }
            else { // default or XML
              if (this.attribute('type').hasValue()) {
                // for transform, etc.
                var type = this.attribute('type').value;
                this.parent.attribute(attributeName, true).value = type + '(' + newValue + ')';
              }
              else {
                this.parent.attribute(attributeName, true).value = newValue;
              }
            }
            updated = true;
          }
        }
        
        return updated;
      }
      
      // fraction of duration we've covered
      this.progress = function() {
        return ((this.duration - this.begin) / (this.maxDuration - this.begin));
      }      
    }
    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 from = this.attribute('from').numValue();
        var to = this.attribute('to').numValue();
        
        // tween value linearly
        return from + (to - from) * this.progress(); 
      };
    }
    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 from = new RGBColor(this.attribute('from').value);
        var to = new RGBColor(this.attribute('to').value);
        
        if (from.ok && to.ok) {
          // tween color linearly
          var r = from.r + (to.r - from.r) * this.progress();
          var g = from.g + (to.g - from.g) * this.progress();
          var b = from.b + (to.b - from.b) * this.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.animate;
      this.base(node);
    }
    svg.Element.animateTransform.prototype = new svg.Element.animate;
    
    // text element
    svg.Element.text = function(node) {
      this.base = svg.Element.RenderedElementBase;
      this.base(node);
      
      if (node != null) {
        // add children
        this.children = [];
        for (var i=0; i<node.childNodes.length; i++) {
          var childNode = node.childNodes[i];
          if (childNode.nodeType == 1) { // capture tspan and tref nodes
            this.addChild(childNode, true);
          }
          else if (childNode.nodeType == 3) { // capture text
            this.addChild(new svg.Element.tspan(childNode), false);
          }
        }
      }
      
      this.baseSetContext = this.setContext;
      this.setContext = function(ctx) {
        this.baseSetContext(ctx);
        if (this.attribute('text-anchor').hasValue()) {
          var textAnchor = this.attribute('text-anchor').value;
          ctx.textAlign = textAnchor == 'middle' ? 'center' : textAnchor;
        }
        if (this.attribute('alignment-baseline').hasValue()) ctx.textBaseline = this.attribute('alignment-baseline').value;
      }
      
      this.renderChildren = function(ctx) {
        var x = this.attribute('x').Length.toPixels('x');
        var y = this.attribute('y').Length.toPixels('y');
        for (var i=0; i<this.children.length; i++) {
          var child = this.children[i];
        
          if (child.attribute('x').hasValue()) {
            child.x = child.attribute('x').Length.toPixels('x');
          }
          else {
            if (child.attribute('dx').hasValue()) x += child.attribute('dx').Length.toPixels('x');
            child.x = x;
            x += child.measureText(ctx);
          }
          
          if (child.attribute('y').hasValue()) {
            child.y = child.attribute('y').Length.toPixels('y');
          }
          else {
            if (child.attribute('dy').hasValue()) y += child.attribute('dy').Length.toPixels('y');
            child.y = y;
          }  
          
          child.render(ctx);
        }
      }
    }
    svg.Element.text.prototype = new svg.Element.RenderedElementBase;
    
    // text base
    svg.Element.TextElementBase = function(node) {
      this.base = svg.Element.RenderedElementBase;
      this.base(node);
      
      this.renderChildren = function(ctx) {
        ctx.fillText(svg.compressSpaces(this.getText()), this.x, this.y);
      }
      
      this.getText = function() {
        // OVERRIDE ME
      }
      
      this.measureText = function(ctx) {
        var textToMeasure = svg.compressSpaces(this.getText());
        if (!ctx.measureText) return textToMeasure.length * 10;
        return ctx.measureText(textToMeasure).width;
      }
    }
    svg.Element.TextElementBase.prototype = new svg.Element.RenderedElementBase;
    
    // tspan 
    svg.Element.tspan = function(node) {
      this.base = svg.Element.TextElementBase;
      this.base(node);
      
      //                 TEXT        ELEMENT
      this.text = node.nodeType == 3 ? node.nodeValue : node.childNodes[0].nodeValue;
      this.getText = function() {
        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.attribute('xlink:href').Definition.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 = true;
      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].nodeValue : '';
      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.Length.toPixels('y'), this.x + this.measureText(ctx), this.y));          
        }
        else {
          // render as temporary group
          var g = new svg.Element.g();
          g.children = this.children;
          g.parent = this;
          g.render(ctx);
        }
      }
      
      this.onclick = function() {
        window.open(this.attribute('xlink:href').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);
      
      svg.Images.push(this);
      this.img = document.createElement('img');
      this.loaded = false;
      var that = this;
      this.img.onload = function() { that.loaded = true; }
      this.img.src = this.attribute('xlink:href').value;
      
      this.renderChildren = function(ctx) {
        var x = this.attribute('x').Length.toPixels('x');
        var y = this.attribute('y').Length.toPixels('y');
        
        var width = this.attribute('width').Length.toPixels('x');
        var height = this.attribute('height').Length.toPixels('y');      
        if (width == 0 || height == 0) return;
      
        ctx.save();
        ctx.translate(x, y);
        svg.AspectRatio(ctx,
                this.attribute('preserveAspectRatio').value,
                width,
                this.img.width,
                height,
                this.img.height,
                0,
                0);  
        ctx.drawImage(this.img, 0, 0);      
        ctx.restore();
      }
    }
    svg.Element.image.prototype = new svg.Element.RenderedElementBase;
    
    // group element
    svg.Element.g = function(node) {
      this.base = svg.Element.RenderedElementBase;
      this.base(node);
    }
    svg.Element.g.prototype = new svg.Element.RenderedElementBase;

    // symbol element
    svg.Element.symbol = function(node) {
      this.base = svg.Element.RenderedElementBase;
      this.base(node);
    }
    svg.Element.symbol.prototype = new svg.Element.RenderedElementBase;    
      
    // style element
    svg.Element.style = function(node) { 
      this.base = svg.Element.ElementBase;
      this.base(node);
      
      var css = node.childNodes[0].nodeValue;
      css = css.replace(/(\/\*([^*]|[\r\n]|(\*+([^*\/]|[\r\n])))*\*+\/)|(\/\/.*)/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 = {};
              for (var k=0; k<cssProps.length; k++) {
                var prop = cssProps[k].split(':');
                var name = prop[0];
                var value = prop[1];
                if (name != null && value != null) {
                  props[svg.trim(prop[0])] = new svg.Property(svg.trim(prop[0]), svg.trim(prop[1]));
                }
              }
              svg.Styles[cssClass] = props;
            }
          }
        }
      }
    }
    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').Length.toPixels('x'), 0);
        if (this.attribute('y').hasValue()) ctx.translate(0, this.attribute('y').Length.toPixels('y'));
      }
      
      this.getDefinition = function() {
        return this.attribute('xlink:href').Definition.getDefinition();
      }
      
      this.path = function(ctx) {
        var element = this.getDefinition();
        if (element != null) element.path(ctx);
      }
      
      this.renderChildren = function(ctx) {
        var element = this.getDefinition();
        if (element != null) element.render(ctx);
      }
    }
    svg.Element.use.prototype = new svg.Element.RenderedElementBase;
    
    // clip element
    svg.Element.clipPath = function(node) {
      this.base = svg.Element.ElementBase;
      this.base(node);
      
      this.apply = function(ctx) {
        for (var i=0; i<this.children.length; i++) {
          if (this.children[i].path) {
            this.children[i].path(ctx);
            ctx.clip();
          }
        }
      }
    }
    svg.Element.clipPath.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) {
      console.log('ERROR: Element \'' + node.nodeName + '\' not yet implemented.');
    }
    svg.Element.MISSING.prototype = new svg.Element.ElementBase;
    
    // element factory
    svg.CreateElement = function(node) {
      var className = 'svg.Element.' + node.nodeName.replace(/^[^:]+:/,'');
      if (!eval(className)) className = 'svg.Element.MISSING';
    
      var e = eval('new ' + className + '(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.init(ctx);
      
      var mapXY = function(p) {
        var e = ctx.canvas;
        while (e) {
          p.x -= e.offsetLeft;
          p.y -= e.offsetTop;
          e = e.offsetParent;
        }
        if (window.scrollX) p.x += window.scrollX;
        if (window.scrollY) p.y += window.scrollY;
        return p;
      }
      
      // bind mouse
      if (svg.opts == null || 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 dom = svg.parseXml(xml);
      var e = svg.CreateElement(dom.documentElement);
          
      // render loop
      var isFirstRender = true;
      var draw = function() {
        // set canvas size
        if (e.style('width').hasValue()) {
          ctx.canvas.width = e.style('width').Length.toPixels(ctx.canvas.parentNode.clientWidth);
        }
        if (e.style('height').hasValue()) {
          ctx.canvas.height = e.style('height').Length.toPixels(ctx.canvas.parentNode.clientHeight);
        }
        svg.ViewPort.SetCurrent(ctx.canvas.clientWidth, ctx.canvas.clientHeight);      
      
        // clear and render
        ctx.clearRect(0, 0, ctx.canvas.clientWidth, ctx.canvas.clientHeight);
        e.render(ctx);
        if (isFirstRender) {
          isFirstRender = false;
          if (svg.opts != null && typeof(svg.opts['renderCallback']) == 'function') svg.opts['renderCallback']();
        }      
      }
      
      var waitingForImages = true;
      if (svg.ImagesLoaded()) {
        waitingForImages = false;
        draw();
      }
      svg.intervalID = setInterval(function() { 
        var needUpdate = false;
        
        if (waitingForImages && svg.ImagesLoaded()) {
          waitingForImages = false;
          needUpdate = true;
        }
      
        // need update from mouse events?
        if (svg.opts == null || svg.opts['ignoreMouse'] != true) {
          needUpdate = needUpdate | svg.Mouse.hasEvents();
        }
      
        // need update from animations?
        if (svg.opts == null || svg.opts['ignoreAnimation'] != true) {
          for (var i=0; i<svg.Animations.length; i++) {
            needUpdate = needUpdate | svg.Animations[i].update(1000 / svg.FRAMERATE);
          }
        }
        
        // need update from redraw?
        if (svg.opts != null && 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) {
        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;
  }
})();