--- a/web/data/excanvas.js Thu Sep 29 14:42:39 2011 +0200
+++ b/web/data/excanvas.js Thu Sep 29 14:46:41 2011 +0200
@@ -1,30 +1,1438 @@
-/**
- * jqPlot
- * Pure JavaScript plotting plugin using jQuery
- *
- * Version: @VERSION
- *
- * Copyright (c) 2009-2011 Chris Leonello
- * jqPlot is currently available for use in all personal or commercial projects
- * under both the MIT (http://www.opensource.org/licenses/mit-license.php) and GPL
- * version 2.0 (http://www.gnu.org/licenses/gpl-2.0.html) licenses. This means that you can
- * choose the license that best suits your project and use it accordingly.
- *
- * Although not required, the author would appreciate an email letting him
- * know of any substantial use of jqPlot. You can reach the author at:
- * chris at jqplot dot com or see http://www.jqplot.com/info.php .
- *
- * If you are feeling kind and generous, consider supporting the project by
- * making a donation at: http://www.jqplot.com/donate.php .
- *
- * sprintf functions contained in jqplot.sprintf.js by Ash Searle:
- *
- * version 2007.04.27
- * author Ash Searle
- * http://hexmen.com/blog/2007/03/printf-sprintf/
- * http://hexmen.com/js/sprintf.js
- * The author (Ash Searle) has placed this code in the public domain:
- * "This code is unrestricted: you are free to use it however you like."
- *
- */
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i=[[ag,Z,0],[ai,ah,0],[p,j,1]];aa(this,i,true)};q.drawText_=function(am,ak,aj,ap,ai){var ao=this.m_,at=1000,j=0,ar=at,ah={x:0,y:0},ag=[];var i=u(E(this.font),this.element_);var p=ac(i);var au=this.element_.currentStyle;var Z=this.textAlign.toLowerCase();switch(Z){case"left":case"center":case"right":break;case"end":Z=au.direction=="ltr"?"right":"left";break;case"start":Z=au.direction=="rtl"?"right":"left";break;default:Z="left"}switch(this.textBaseline){case"hanging":case"top":ah.y=i.size/1.75;break;case"middle":break;default:case null:case"alphabetic":case"ideographic":case"bottom":ah.y=-i.size/2.25;break}switch(Z){case"right":j=at;ar=0.05;break;case"center":j=ar=at/2;break}var aq=V(this,ak+ah.x,aj+ah.y);ag.push('<g_vml_:line from="',-j,' 0" to="',ar,' 0.05" ',' coordsize="100 100" coordorigin="0 0"',' filled="',!ai,'" stroked="',!!ai,'" style="position:absolute;width:1px;height:1px;">');if(ai){w(this,ag)}else{G(this,ag,{x:-j,y:0},{x:ar,y:i.size})}var an=ao[0][0].toFixed(3)+","+ao[1][0].toFixed(3)+","+ao[0][1].toFixed(3)+","+ao[1][1].toFixed(3)+",0,0";var al=n(aq.x/d)+","+n(aq.y/d);ag.push('<g_vml_:skew on="t" matrix="',an,'" ',' offset="',al,'" origin="',j,' 0" />','<g_vml_:path textpathok="true" />','<g_vml_:textpath on="true" string="',af(am),'" style="v-text-align:',Z,";font:",af(p),'" /></g_vml_:line>');this.element_.insertAdjacentHTML("beforeEnd",ag.join(""))};q.fillText=function(m,i,p,j){this.drawText_(m,i,p,j,false)};q.strokeText=function(m,i,p,j){this.drawText_(m,i,p,j,true)};q.measureText=function(m){if(!this.textMeasureEl_){var i='<span style="position:absolute;top:-20000px;left:0;padding:0;margin:0;border:none;white-space:pre;"></span>';this.element_.insertAdjacentHTML("beforeEnd",i);this.textMeasureEl_=this.element_.lastChild}var j=this.element_.ownerDocument;this.textMeasureEl_.innerHTML="";this.textMeasureEl_.style.font=this.font;this.textMeasureEl_.appendChild(j.createTextNode(m));return{width:this.textMeasureEl_.offsetWidth}};q.clip=function(){};q.arcTo=function(){};q.createPattern=function(j,i){return new T(j,i)};function U(i){this.type_=i;this.x0_=0;this.y0_=0;this.r0_=0;this.x1_=0;this.y1_=0;this.r1_=0;this.colors_=[]}U.prototype.addColorStop=function(j,i){i=F(i);this.colors_.push({offset:j,color:i.color,alpha:i.alpha})};function T(j,i){Q(j);switch(i){case"repeat":case null:case"":this.repetition_="repeat";break;case"repeat-x":case"repeat-y":case"no-repeat":this.repetition_=i;break;default:O("SYNTAX_ERR")}this.src_=j.src;this.width_=j.width;this.height_=j.height}function O(i){throw new P(i)}function Q(i){if(!i||i.nodeType!=1||i.tagName!="IMG"){O("TYPE_MISMATCH_ERR")}if(i.readyState!="complete"){O("INVALID_STATE_ERR")}}function P(i){this.code=this[i];this.message=i+": DOM Exception "+this.code}var X=P.prototype=new Error;X.INDEX_SIZE_ERR=1;X.DOMSTRING_SIZE_ERR=2;X.HIERARCHY_REQUEST_ERR=3;X.WRONG_DOCUMENT_ERR=4;X.INVALID_CHARACTER_ERR=5;X.NO_DATA_ALLOWED_ERR=6;X.NO_MODIFICATION_ALLOWED_ERR=7;X.NOT_FOUND_ERR=8;X.NOT_SUPPORTED_ERR=9;X.INUSE_ATTRIBUTE_ERR=10;X.INVALID_STATE_ERR=11;X.SYNTAX_ERR=12;X.INVALID_MODIFICATION_ERR=13;X.NAMESPACE_ERR=14;X.INVALID_ACCESS_ERR=15;X.VALIDATION_ERR=16;X.TYPE_MISMATCH_ERR=17;G_vmlCanvasManager=e;CanvasRenderingContext2D=D;CanvasGradient=U;CanvasPattern=T;DOMException=P})()};
\ No newline at end of file
+// Memory Leaks patch from http://explorercanvas.googlecode.com/svn/trunk/
+// svn : r73
+// ------------------------------------------------------------------
+// Copyright 2006 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+
+// Known Issues:
+//
+// * Patterns only support repeat.
+// * Radial gradient are not implemented. The VML version of these look very
+// different from the canvas one.
+// * Clipping paths are not implemented.
+// * Coordsize. The width and height attribute have higher priority than the
+// width and height style values which isn't correct.
+// * Painting mode isn't implemented.
+// * Canvas width/height should is using content-box by default. IE in
+// Quirks mode will draw the canvas using border-box. Either change your
+// doctype to HTML5
+// (http://www.whatwg.org/specs/web-apps/current-work/#the-doctype)
+// or use Box Sizing Behavior from WebFX
+// (http://webfx.eae.net/dhtml/boxsizing/boxsizing.html)
+// * Non uniform scaling does not correctly scale strokes.
+// * Optimize. There is always room for speed improvements.
+
+// Only add this code if we do not already have a canvas implementation
+if (!document.createElement('canvas').getContext) {
+
+(function() {
+
+ // alias some functions to make (compiled) code shorter
+ var m = Math;
+ var mr = m.round;
+ var ms = m.sin;
+ var mc = m.cos;
+ var abs = m.abs;
+ var sqrt = m.sqrt;
+
+ // this is used for sub pixel precision
+ var Z = 10;
+ var Z2 = Z / 2;
+
+ var IE_VERSION = +navigator.userAgent.match(/MSIE ([\d.]+)?/)[1];
+
+ /**
+ * This funtion is assigned to the <canvas> elements as element.getContext().
+ * @this {HTMLElement}
+ * @return {CanvasRenderingContext2D_}
+ */
+ function getContext() {
+ return this.context_ ||
+ (this.context_ = new CanvasRenderingContext2D_(this));
+ }
+
+ var slice = Array.prototype.slice;
+
+ /**
+ * Binds a function to an object. The returned function will always use the
+ * passed in {@code obj} as {@code this}.
+ *
+ * Example:
+ *
+ * g = bind(f, obj, a, b)
+ * g(c, d) // will do f.call(obj, a, b, c, d)
+ *
+ * @param {Function} f The function to bind the object to
+ * @param {Object} obj The object that should act as this when the function
+ * is called
+ * @param {*} var_args Rest arguments that will be used as the initial
+ * arguments when the function is called
+ * @return {Function} A new function that has bound this
+ */
+ function bind(f, obj, var_args) {
+ var a = slice.call(arguments, 2);
+ return function() {
+ return f.apply(obj, a.concat(slice.call(arguments)));
+ };
+ }
+
+ function encodeHtmlAttribute(s) {
+ return String(s).replace(/&/g, '&').replace(/"/g, '"');
+ }
+
+ function addNamespace(doc, prefix, urn) {
+ if (!doc.namespaces[prefix]) {
+ doc.namespaces.add(prefix, urn, '#default#VML');
+ }
+ }
+
+ function addNamespacesAndStylesheet(doc) {
+ addNamespace(doc, 'g_vml_', 'urn:schemas-microsoft-com:vml');
+ addNamespace(doc, 'g_o_', 'urn:schemas-microsoft-com:office:office');
+
+ // Setup default CSS. Only add one style sheet per document
+ if (!doc.styleSheets['ex_canvas_']) {
+ var ss = doc.createStyleSheet();
+ ss.owningElement.id = 'ex_canvas_';
+ ss.cssText = 'canvas{display:inline-block;overflow:hidden;' +
+ // default size is 300x150 in Gecko and Opera
+ 'text-align:left;width:300px;height:150px}';
+ }
+ }
+
+ // Add namespaces and stylesheet at startup.
+ addNamespacesAndStylesheet(document);
+
+ var G_vmlCanvasManager_ = {
+ init: function(opt_doc) {
+ var doc = opt_doc || document;
+ // Create a dummy element so that IE will allow canvas elements to be
+ // recognized.
+ doc.createElement('canvas');
+ doc.attachEvent('onreadystatechange', bind(this.init_, this, doc));
+ },
+
+ init_: function(doc) {
+ // find all canvas elements
+ var els = doc.getElementsByTagName('canvas');
+ for (var i = 0; i < els.length; i++) {
+ this.initElement(els[i]);
+ }
+ },
+
+ /**
+ * Public initializes a canvas element so that it can be used as canvas
+ * element from now on. This is called automatically before the page is
+ * loaded but if you are creating elements using createElement you need to
+ * make sure this is called on the element.
+ * @param {HTMLElement} el The canvas element to initialize.
+ * @return {HTMLElement} the element that was created.
+ */
+ initElement: function(el) {
+ if (!el.getContext) {
+ el.getContext = getContext;
+
+ // Add namespaces and stylesheet to document of the element.
+ addNamespacesAndStylesheet(el.ownerDocument);
+
+ // Remove fallback content. There is no way to hide text nodes so we
+ // just remove all childNodes. We could hide all elements and remove
+ // text nodes but who really cares about the fallback content.
+ el.innerHTML = '';
+
+ // do not use inline function because that will leak memory
+ el.attachEvent('onpropertychange', onPropertyChange);
+ el.attachEvent('onresize', onResize);
+
+ var attrs = el.attributes;
+ if (attrs.width && attrs.width.specified) {
+ // TODO: use runtimeStyle and coordsize
+ // el.getContext().setWidth_(attrs.width.nodeValue);
+ el.style.width = attrs.width.nodeValue + 'px';
+ } else {
+ el.width = el.clientWidth;
+ }
+ if (attrs.height && attrs.height.specified) {
+ // TODO: use runtimeStyle and coordsize
+ // el.getContext().setHeight_(attrs.height.nodeValue);
+ el.style.height = attrs.height.nodeValue + 'px';
+ } else {
+ el.height = el.clientHeight;
+ }
+ //el.getContext().setCoordsize_()
+ }
+ return el;
+ },
+
+ // Memory Leaks patch : see http://code.google.com/p/explorercanvas/issues/detail?id=82
+ uninitElement: function(el){
+ if (el.getContext) {
+ var ctx = el.getContext();
+ delete ctx.element_;
+ delete ctx.canvas;
+ el.innerHTML = "";
+ //el.outerHTML = "";
+ el.context_ = null;
+ el.getContext = null;
+ el.detachEvent("onpropertychange", onPropertyChange);
+ el.detachEvent("onresize", onResize);
+ }
+ }
+ };
+
+ function onPropertyChange(e) {
+ var el = e.srcElement;
+
+ switch (e.propertyName) {
+ case 'width':
+ el.getContext().clearRect();
+ el.style.width = el.attributes.width.nodeValue + 'px';
+ // In IE8 this does not trigger onresize.
+ el.firstChild.style.width = el.clientWidth + 'px';
+ break;
+ case 'height':
+ el.getContext().clearRect();
+ el.style.height = el.attributes.height.nodeValue + 'px';
+ el.firstChild.style.height = el.clientHeight + 'px';
+ break;
+ }
+ }
+
+ function onResize(e) {
+ var el = e.srcElement;
+ if (el.firstChild) {
+ el.firstChild.style.width = el.clientWidth + 'px';
+ el.firstChild.style.height = el.clientHeight + 'px';
+ }
+ }
+
+ G_vmlCanvasManager_.init();
+
+ // precompute "00" to "FF"
+ var decToHex = [];
+ for (var i = 0; i < 16; i++) {
+ for (var j = 0; j < 16; j++) {
+ decToHex[i * 16 + j] = i.toString(16) + j.toString(16);
+ }
+ }
+
+ function createMatrixIdentity() {
+ return [
+ [1, 0, 0],
+ [0, 1, 0],
+ [0, 0, 1]
+ ];
+ }
+
+ function matrixMultiply(m1, m2) {
+ var result = createMatrixIdentity();
+
+ for (var x = 0; x < 3; x++) {
+ for (var y = 0; y < 3; y++) {
+ var sum = 0;
+
+ for (var z = 0; z < 3; z++) {
+ sum += m1[x][z] * m2[z][y];
+ }
+
+ result[x][y] = sum;
+ }
+ }
+ return result;
+ }
+
+ function copyState(o1, o2) {
+ o2.fillStyle = o1.fillStyle;
+ o2.lineCap = o1.lineCap;
+ o2.lineJoin = o1.lineJoin;
+ o2.lineWidth = o1.lineWidth;
+ o2.miterLimit = o1.miterLimit;
+ o2.shadowBlur = o1.shadowBlur;
+ o2.shadowColor = o1.shadowColor;
+ o2.shadowOffsetX = o1.shadowOffsetX;
+ o2.shadowOffsetY = o1.shadowOffsetY;
+ o2.strokeStyle = o1.strokeStyle;
+ o2.globalAlpha = o1.globalAlpha;
+ o2.font = o1.font;
+ o2.textAlign = o1.textAlign;
+ o2.textBaseline = o1.textBaseline;
+ o2.arcScaleX_ = o1.arcScaleX_;
+ o2.arcScaleY_ = o1.arcScaleY_;
+ o2.lineScale_ = o1.lineScale_;
+ }
+
+ var colorData = {
+ aliceblue: '#F0F8FF',
+ antiquewhite: '#FAEBD7',
+ aquamarine: '#7FFFD4',
+ azure: '#F0FFFF',
+ beige: '#F5F5DC',
+ bisque: '#FFE4C4',
+ black: '#000000',
+ blanchedalmond: '#FFEBCD',
+ blueviolet: '#8A2BE2',
+ brown: '#A52A2A',
+ burlywood: '#DEB887',
+ cadetblue: '#5F9EA0',
+ chartreuse: '#7FFF00',
+ chocolate: '#D2691E',
+ coral: '#FF7F50',
+ cornflowerblue: '#6495ED',
+ cornsilk: '#FFF8DC',
+ crimson: '#DC143C',
+ cyan: '#00FFFF',
+ darkblue: '#00008B',
+ darkcyan: '#008B8B',
+ darkgoldenrod: '#B8860B',
+ darkgray: '#A9A9A9',
+ darkgreen: '#006400',
+ darkgrey: '#A9A9A9',
+ darkkhaki: '#BDB76B',
+ darkmagenta: '#8B008B',
+ darkolivegreen: '#556B2F',
+ darkorange: '#FF8C00',
+ darkorchid: '#9932CC',
+ darkred: '#8B0000',
+ darksalmon: '#E9967A',
+ darkseagreen: '#8FBC8F',
+ darkslateblue: '#483D8B',
+ darkslategray: '#2F4F4F',
+ darkslategrey: '#2F4F4F',
+ darkturquoise: '#00CED1',
+ darkviolet: '#9400D3',
+ deeppink: '#FF1493',
+ deepskyblue: '#00BFFF',
+ dimgray: '#696969',
+ dimgrey: '#696969',
+ dodgerblue: '#1E90FF',
+ firebrick: '#B22222',
+ floralwhite: '#FFFAF0',
+ forestgreen: '#228B22',
+ gainsboro: '#DCDCDC',
+ ghostwhite: '#F8F8FF',
+ gold: '#FFD700',
+ goldenrod: '#DAA520',
+ grey: '#808080',
+ greenyellow: '#ADFF2F',
+ honeydew: '#F0FFF0',
+ hotpink: '#FF69B4',
+ indianred: '#CD5C5C',
+ indigo: '#4B0082',
+ ivory: '#FFFFF0',
+ khaki: '#F0E68C',
+ lavender: '#E6E6FA',
+ lavenderblush: '#FFF0F5',
+ lawngreen: '#7CFC00',
+ lemonchiffon: '#FFFACD',
+ lightblue: '#ADD8E6',
+ lightcoral: '#F08080',
+ lightcyan: '#E0FFFF',
+ lightgoldenrodyellow: '#FAFAD2',
+ lightgreen: '#90EE90',
+ lightgrey: '#D3D3D3',
+ lightpink: '#FFB6C1',
+ lightsalmon: '#FFA07A',
+ lightseagreen: '#20B2AA',
+ lightskyblue: '#87CEFA',
+ lightslategray: '#778899',
+ lightslategrey: '#778899',
+ lightsteelblue: '#B0C4DE',
+ lightyellow: '#FFFFE0',
+ limegreen: '#32CD32',
+ linen: '#FAF0E6',
+ magenta: '#FF00FF',
+ mediumaquamarine: '#66CDAA',
+ mediumblue: '#0000CD',
+ mediumorchid: '#BA55D3',
+ mediumpurple: '#9370DB',
+ mediumseagreen: '#3CB371',
+ mediumslateblue: '#7B68EE',
+ mediumspringgreen: '#00FA9A',
+ mediumturquoise: '#48D1CC',
+ mediumvioletred: '#C71585',
+ midnightblue: '#191970',
+ mintcream: '#F5FFFA',
+ mistyrose: '#FFE4E1',
+ moccasin: '#FFE4B5',
+ navajowhite: '#FFDEAD',
+ oldlace: '#FDF5E6',
+ olivedrab: '#6B8E23',
+ orange: '#FFA500',
+ orangered: '#FF4500',
+ orchid: '#DA70D6',
+ palegoldenrod: '#EEE8AA',
+ palegreen: '#98FB98',
+ paleturquoise: '#AFEEEE',
+ palevioletred: '#DB7093',
+ papayawhip: '#FFEFD5',
+ peachpuff: '#FFDAB9',
+ peru: '#CD853F',
+ pink: '#FFC0CB',
+ plum: '#DDA0DD',
+ powderblue: '#B0E0E6',
+ rosybrown: '#BC8F8F',
+ royalblue: '#4169E1',
+ saddlebrown: '#8B4513',
+ salmon: '#FA8072',
+ sandybrown: '#F4A460',
+ seagreen: '#2E8B57',
+ seashell: '#FFF5EE',
+ sienna: '#A0522D',
+ skyblue: '#87CEEB',
+ slateblue: '#6A5ACD',
+ slategray: '#708090',
+ slategrey: '#708090',
+ snow: '#FFFAFA',
+ springgreen: '#00FF7F',
+ steelblue: '#4682B4',
+ tan: '#D2B48C',
+ thistle: '#D8BFD8',
+ tomato: '#FF6347',
+ turquoise: '#40E0D0',
+ violet: '#EE82EE',
+ wheat: '#F5DEB3',
+ whitesmoke: '#F5F5F5',
+ yellowgreen: '#9ACD32'
+ };
+
+
+ function getRgbHslContent(styleString) {
+ var start = styleString.indexOf('(', 3);
+ var end = styleString.indexOf(')', start + 1);
+ var parts = styleString.substring(start + 1, end).split(',');
+ // add alpha if needed
+ if (parts.length != 4 || styleString.charAt(3) != 'a') {
+ parts[3] = 1;
+ }
+ return parts;
+ }
+
+ function percent(s) {
+ return parseFloat(s) / 100;
+ }
+
+ function clamp(v, min, max) {
+ return Math.min(max, Math.max(min, v));
+ }
+
+ function hslToRgb(parts){
+ var r, g, b, h, s, l;
+ h = parseFloat(parts[0]) / 360 % 360;
+ if (h < 0)
+ h++;
+ s = clamp(percent(parts[1]), 0, 1);
+ l = clamp(percent(parts[2]), 0, 1);
+ if (s == 0) {
+ r = g = b = l; // achromatic
+ } else {
+ var q = l < 0.5 ? l * (1 + s) : l + s - l * s;
+ var p = 2 * l - q;
+ r = hueToRgb(p, q, h + 1 / 3);
+ g = hueToRgb(p, q, h);
+ b = hueToRgb(p, q, h - 1 / 3);
+ }
+
+ return '#' + decToHex[Math.floor(r * 255)] +
+ decToHex[Math.floor(g * 255)] +
+ decToHex[Math.floor(b * 255)];
+ }
+
+ function hueToRgb(m1, m2, h) {
+ if (h < 0)
+ h++;
+ if (h > 1)
+ h--;
+
+ if (6 * h < 1)
+ return m1 + (m2 - m1) * 6 * h;
+ else if (2 * h < 1)
+ return m2;
+ else if (3 * h < 2)
+ return m1 + (m2 - m1) * (2 / 3 - h) * 6;
+ else
+ return m1;
+ }
+
+ var processStyleCache = {};
+
+ function processStyle(styleString) {
+ if (styleString in processStyleCache) {
+ return processStyleCache[styleString];
+ }
+
+ var str, alpha = 1;
+
+ styleString = String(styleString);
+ if (styleString.charAt(0) == '#') {
+ str = styleString;
+ } else if (/^rgb/.test(styleString)) {
+ var parts = getRgbHslContent(styleString);
+ var str = '#', n;
+ for (var i = 0; i < 3; i++) {
+ if (parts[i].indexOf('%') != -1) {
+ n = Math.floor(percent(parts[i]) * 255);
+ } else {
+ n = +parts[i];
+ }
+ str += decToHex[clamp(n, 0, 255)];
+ }
+ alpha = +parts[3];
+ } else if (/^hsl/.test(styleString)) {
+ var parts = getRgbHslContent(styleString);
+ str = hslToRgb(parts);
+ alpha = parts[3];
+ } else {
+ str = colorData[styleString] || styleString;
+ }
+ return processStyleCache[styleString] = {color: str, alpha: alpha};
+ }
+
+ var DEFAULT_STYLE = {
+ style: 'normal',
+ variant: 'normal',
+ weight: 'normal',
+ size: 10,
+ family: 'sans-serif'
+ };
+
+ // Internal text style cache
+ var fontStyleCache = {};
+
+ function processFontStyle(styleString) {
+ if (fontStyleCache[styleString]) {
+ return fontStyleCache[styleString];
+ }
+
+ var el = document.createElement('div');
+ var style = el.style;
+ try {
+ style.font = styleString;
+ } catch (ex) {
+ // Ignore failures to set to invalid font.
+ }
+
+ return fontStyleCache[styleString] = {
+ style: style.fontStyle || DEFAULT_STYLE.style,
+ variant: style.fontVariant || DEFAULT_STYLE.variant,
+ weight: style.fontWeight || DEFAULT_STYLE.weight,
+ size: style.fontSize || DEFAULT_STYLE.size,
+ family: style.fontFamily || DEFAULT_STYLE.family
+ };
+ }
+
+ function getComputedStyle(style, element) {
+ var computedStyle = {};
+
+ for (var p in style) {
+ computedStyle[p] = style[p];
+ }
+
+ // Compute the size
+ var canvasFontSize = parseFloat(element.currentStyle.fontSize),
+ fontSize = parseFloat(style.size);
+
+ if (typeof style.size == 'number') {
+ computedStyle.size = style.size;
+ } else if (style.size.indexOf('px') != -1) {
+ computedStyle.size = fontSize;
+ } else if (style.size.indexOf('em') != -1) {
+ computedStyle.size = canvasFontSize * fontSize;
+ } else if(style.size.indexOf('%') != -1) {
+ computedStyle.size = (canvasFontSize / 100) * fontSize;
+ } else if (style.size.indexOf('pt') != -1) {
+ computedStyle.size = fontSize / .75;
+ } else {
+ computedStyle.size = canvasFontSize;
+ }
+
+ // Different scaling between normal text and VML text. This was found using
+ // trial and error to get the same size as non VML text.
+ computedStyle.size *= 0.981;
+
+ // Fix for VML handling of bare font family names. Add a '' around font family names.
+ computedStyle.family = "'" + computedStyle.family.replace(/(\'|\")/g,'').replace(/\s*,\s*/g, "', '") + "'";
+
+ return computedStyle;
+ }
+
+ function buildStyle(style) {
+ return style.style + ' ' + style.variant + ' ' + style.weight + ' ' +
+ style.size + 'px ' + style.family;
+ }
+
+ var lineCapMap = {
+ 'butt': 'flat',
+ 'round': 'round'
+ };
+
+ function processLineCap(lineCap) {
+ return lineCapMap[lineCap] || 'square';
+ }
+
+ /**
+ * This class implements CanvasRenderingContext2D interface as described by
+ * the WHATWG.
+ * @param {HTMLElement} canvasElement The element that the 2D context should
+ * be associated with
+ */
+ function CanvasRenderingContext2D_(canvasElement) {
+ this.m_ = createMatrixIdentity();
+
+ this.mStack_ = [];
+ this.aStack_ = [];
+ this.currentPath_ = [];
+
+ // Canvas context properties
+ this.strokeStyle = '#000';
+ this.fillStyle = '#000';
+
+ this.lineWidth = 1;
+ this.lineJoin = 'miter';
+ this.lineCap = 'butt';
+ this.miterLimit = Z * 1;
+ this.globalAlpha = 1;
+ this.font = '10px sans-serif';
+ this.textAlign = 'left';
+ this.textBaseline = 'alphabetic';
+ this.canvas = canvasElement;
+
+ var cssText = 'width:' + canvasElement.clientWidth + 'px;height:' +
+ canvasElement.clientHeight + 'px;overflow:hidden;position:absolute';
+ var el = canvasElement.ownerDocument.createElement('div');
+ el.style.cssText = cssText;
+ canvasElement.appendChild(el);
+
+ var overlayEl = el.cloneNode(false);
+ // Use a non transparent background.
+ overlayEl.style.backgroundColor = 'red';
+ overlayEl.style.filter = 'alpha(opacity=0)';
+ canvasElement.appendChild(overlayEl);
+
+ this.element_ = el;
+ this.arcScaleX_ = 1;
+ this.arcScaleY_ = 1;
+ this.lineScale_ = 1;
+ }
+
+ var contextPrototype = CanvasRenderingContext2D_.prototype;
+ contextPrototype.clearRect = function() {
+ if (this.textMeasureEl_) {
+ this.textMeasureEl_.removeNode(true);
+ this.textMeasureEl_ = null;
+ }
+ this.element_.innerHTML = '';
+ };
+
+ contextPrototype.beginPath = function() {
+ // TODO: Branch current matrix so that save/restore has no effect
+ // as per safari docs.
+ this.currentPath_ = [];
+ };
+
+ contextPrototype.moveTo = function(aX, aY) {
+ var p = getCoords(this, aX, aY);
+ this.currentPath_.push({type: 'moveTo', x: p.x, y: p.y});
+ this.currentX_ = p.x;
+ this.currentY_ = p.y;
+ };
+
+ contextPrototype.lineTo = function(aX, aY) {
+ var p = getCoords(this, aX, aY);
+ this.currentPath_.push({type: 'lineTo', x: p.x, y: p.y});
+
+ this.currentX_ = p.x;
+ this.currentY_ = p.y;
+ };
+
+ contextPrototype.bezierCurveTo = function(aCP1x, aCP1y,
+ aCP2x, aCP2y,
+ aX, aY) {
+ var p = getCoords(this, aX, aY);
+ var cp1 = getCoords(this, aCP1x, aCP1y);
+ var cp2 = getCoords(this, aCP2x, aCP2y);
+ bezierCurveTo(this, cp1, cp2, p);
+ };
+
+ // Helper function that takes the already fixed cordinates.
+ function bezierCurveTo(self, cp1, cp2, p) {
+ self.currentPath_.push({
+ type: 'bezierCurveTo',
+ cp1x: cp1.x,
+ cp1y: cp1.y,
+ cp2x: cp2.x,
+ cp2y: cp2.y,
+ x: p.x,
+ y: p.y
+ });
+ self.currentX_ = p.x;
+ self.currentY_ = p.y;
+ }
+
+ contextPrototype.quadraticCurveTo = function(aCPx, aCPy, aX, aY) {
+ // the following is lifted almost directly from
+ // http://developer.mozilla.org/en/docs/Canvas_tutorial:Drawing_shapes
+
+ var cp = getCoords(this, aCPx, aCPy);
+ var p = getCoords(this, aX, aY);
+
+ var cp1 = {
+ x: this.currentX_ + 2.0 / 3.0 * (cp.x - this.currentX_),
+ y: this.currentY_ + 2.0 / 3.0 * (cp.y - this.currentY_)
+ };
+ var cp2 = {
+ x: cp1.x + (p.x - this.currentX_) / 3.0,
+ y: cp1.y + (p.y - this.currentY_) / 3.0
+ };
+
+ bezierCurveTo(this, cp1, cp2, p);
+ };
+
+ contextPrototype.arc = function(aX, aY, aRadius,
+ aStartAngle, aEndAngle, aClockwise) {
+ aRadius *= Z;
+ var arcType = aClockwise ? 'at' : 'wa';
+
+ var xStart = aX + mc(aStartAngle) * aRadius - Z2;
+ var yStart = aY + ms(aStartAngle) * aRadius - Z2;
+
+ var xEnd = aX + mc(aEndAngle) * aRadius - Z2;
+ var yEnd = aY + ms(aEndAngle) * aRadius - Z2;
+
+ // IE won't render arches drawn counter clockwise if xStart == xEnd.
+ if (xStart == xEnd && !aClockwise) {
+ xStart += 0.125; // Offset xStart by 1/80 of a pixel. Use something
+ // that can be represented in binary
+ }
+
+ var p = getCoords(this, aX, aY);
+ var pStart = getCoords(this, xStart, yStart);
+ var pEnd = getCoords(this, xEnd, yEnd);
+
+ this.currentPath_.push({type: arcType,
+ x: p.x,
+ y: p.y,
+ radius: aRadius,
+ xStart: pStart.x,
+ yStart: pStart.y,
+ xEnd: pEnd.x,
+ yEnd: pEnd.y});
+
+ };
+
+ contextPrototype.rect = function(aX, aY, aWidth, aHeight) {
+ this.moveTo(aX, aY);
+ this.lineTo(aX + aWidth, aY);
+ this.lineTo(aX + aWidth, aY + aHeight);
+ this.lineTo(aX, aY + aHeight);
+ this.closePath();
+ };
+
+ contextPrototype.strokeRect = function(aX, aY, aWidth, aHeight) {
+ var oldPath = this.currentPath_;
+ this.beginPath();
+
+ this.moveTo(aX, aY);
+ this.lineTo(aX + aWidth, aY);
+ this.lineTo(aX + aWidth, aY + aHeight);
+ this.lineTo(aX, aY + aHeight);
+ this.closePath();
+ this.stroke();
+
+ this.currentPath_ = oldPath;
+ };
+
+ contextPrototype.fillRect = function(aX, aY, aWidth, aHeight) {
+ var oldPath = this.currentPath_;
+ this.beginPath();
+
+ this.moveTo(aX, aY);
+ this.lineTo(aX + aWidth, aY);
+ this.lineTo(aX + aWidth, aY + aHeight);
+ this.lineTo(aX, aY + aHeight);
+ this.closePath();
+ this.fill();
+
+ this.currentPath_ = oldPath;
+ };
+
+ contextPrototype.createLinearGradient = function(aX0, aY0, aX1, aY1) {
+ var gradient = new CanvasGradient_('gradient');
+ gradient.x0_ = aX0;
+ gradient.y0_ = aY0;
+ gradient.x1_ = aX1;
+ gradient.y1_ = aY1;
+ return gradient;
+ };
+
+ contextPrototype.createRadialGradient = function(aX0, aY0, aR0,
+ aX1, aY1, aR1) {
+ var gradient = new CanvasGradient_('gradientradial');
+ gradient.x0_ = aX0;
+ gradient.y0_ = aY0;
+ gradient.r0_ = aR0;
+ gradient.x1_ = aX1;
+ gradient.y1_ = aY1;
+ gradient.r1_ = aR1;
+ return gradient;
+ };
+
+ contextPrototype.drawImage = function(image, var_args) {
+ var dx, dy, dw, dh, sx, sy, sw, sh;
+
+ // to find the original width we overide the width and height
+ var oldRuntimeWidth = image.runtimeStyle.width;
+ var oldRuntimeHeight = image.runtimeStyle.height;
+ image.runtimeStyle.width = 'auto';
+ image.runtimeStyle.height = 'auto';
+
+ // get the original size
+ var w = image.width;
+ var h = image.height;
+
+ // and remove overides
+ image.runtimeStyle.width = oldRuntimeWidth;
+ image.runtimeStyle.height = oldRuntimeHeight;
+
+ if (arguments.length == 3) {
+ dx = arguments[1];
+ dy = arguments[2];
+ sx = sy = 0;
+ sw = dw = w;
+ sh = dh = h;
+ } else if (arguments.length == 5) {
+ dx = arguments[1];
+ dy = arguments[2];
+ dw = arguments[3];
+ dh = arguments[4];
+ sx = sy = 0;
+ sw = w;
+ sh = h;
+ } else if (arguments.length == 9) {
+ sx = arguments[1];
+ sy = arguments[2];
+ sw = arguments[3];
+ sh = arguments[4];
+ dx = arguments[5];
+ dy = arguments[6];
+ dw = arguments[7];
+ dh = arguments[8];
+ } else {
+ throw Error('Invalid number of arguments');
+ }
+
+ var d = getCoords(this, dx, dy);
+
+ var w2 = sw / 2;
+ var h2 = sh / 2;
+
+ var vmlStr = [];
+
+ var W = 10;
+ var H = 10;
+
+ // For some reason that I've now forgotten, using divs didn't work
+ vmlStr.push(' <g_vml_:group',
+ ' coordsize="', Z * W, ',', Z * H, '"',
+ ' coordorigin="0,0"' ,
+ ' style="width:', W, 'px;height:', H, 'px;position:absolute;');
+
+ // If filters are necessary (rotation exists), create them
+ // filters are bog-slow, so only create them if abbsolutely necessary
+ // The following check doesn't account for skews (which don't exist
+ // in the canvas spec (yet) anyway.
+
+ if (this.m_[0][0] != 1 || this.m_[0][1] ||
+ this.m_[1][1] != 1 || this.m_[1][0]) {
+ var filter = [];
+
+ // Note the 12/21 reversal
+ filter.push('M11=', this.m_[0][0], ',',
+ 'M12=', this.m_[1][0], ',',
+ 'M21=', this.m_[0][1], ',',
+ 'M22=', this.m_[1][1], ',',
+ 'Dx=', mr(d.x / Z), ',',
+ 'Dy=', mr(d.y / Z), '');
+
+ // Bounding box calculation (need to minimize displayed area so that
+ // filters don't waste time on unused pixels.
+ var max = d;
+ var c2 = getCoords(this, dx + dw, dy);
+ var c3 = getCoords(this, dx, dy + dh);
+ var c4 = getCoords(this, dx + dw, dy + dh);
+
+ max.x = m.max(max.x, c2.x, c3.x, c4.x);
+ max.y = m.max(max.y, c2.y, c3.y, c4.y);
+
+ vmlStr.push('padding:0 ', mr(max.x / Z), 'px ', mr(max.y / Z),
+ 'px 0;filter:progid:DXImageTransform.Microsoft.Matrix(',
+ filter.join(''), ", sizingmethod='clip');");
+
+ } else {
+ vmlStr.push('top:', mr(d.y / Z), 'px;left:', mr(d.x / Z), 'px;');
+ }
+
+ vmlStr.push(' ">' ,
+ '<g_vml_:image src="', image.src, '"',
+ ' style="width:', Z * dw, 'px;',
+ ' height:', Z * dh, 'px"',
+ ' cropleft="', sx / w, '"',
+ ' croptop="', sy / h, '"',
+ ' cropright="', (w - sx - sw) / w, '"',
+ ' cropbottom="', (h - sy - sh) / h, '"',
+ ' />',
+ '</g_vml_:group>');
+
+ this.element_.insertAdjacentHTML('BeforeEnd', vmlStr.join(''));
+ };
+
+ contextPrototype.stroke = function(aFill) {
+ var lineStr = [];
+ var lineOpen = false;
+
+ var W = 10;
+ var H = 10;
+
+ lineStr.push('<g_vml_:shape',
+ ' filled="', !!aFill, '"',
+ ' style="position:absolute;width:', W, 'px;height:', H, 'px;"',
+ ' coordorigin="0,0"',
+ ' coordsize="', Z * W, ',', Z * H, '"',
+ ' stroked="', !aFill, '"',
+ ' path="');
+
+ var newSeq = false;
+ var min = {x: null, y: null};
+ var max = {x: null, y: null};
+
+ for (var i = 0; i < this.currentPath_.length; i++) {
+ var p = this.currentPath_[i];
+ var c;
+
+ switch (p.type) {
+ case 'moveTo':
+ c = p;
+ lineStr.push(' m ', mr(p.x), ',', mr(p.y));
+ break;
+ case 'lineTo':
+ lineStr.push(' l ', mr(p.x), ',', mr(p.y));
+ break;
+ case 'close':
+ lineStr.push(' x ');
+ p = null;
+ break;
+ case 'bezierCurveTo':
+ lineStr.push(' c ',
+ mr(p.cp1x), ',', mr(p.cp1y), ',',
+ mr(p.cp2x), ',', mr(p.cp2y), ',',
+ mr(p.x), ',', mr(p.y));
+ break;
+ case 'at':
+ case 'wa':
+ lineStr.push(' ', p.type, ' ',
+ mr(p.x - this.arcScaleX_ * p.radius), ',',
+ mr(p.y - this.arcScaleY_ * p.radius), ' ',
+ mr(p.x + this.arcScaleX_ * p.radius), ',',
+ mr(p.y + this.arcScaleY_ * p.radius), ' ',
+ mr(p.xStart), ',', mr(p.yStart), ' ',
+ mr(p.xEnd), ',', mr(p.yEnd));
+ break;
+ }
+
+
+ // TODO: Following is broken for curves due to
+ // move to proper paths.
+
+ // Figure out dimensions so we can do gradient fills
+ // properly
+ if (p) {
+ if (min.x == null || p.x < min.x) {
+ min.x = p.x;
+ }
+ if (max.x == null || p.x > max.x) {
+ max.x = p.x;
+ }
+ if (min.y == null || p.y < min.y) {
+ min.y = p.y;
+ }
+ if (max.y == null || p.y > max.y) {
+ max.y = p.y;
+ }
+ }
+ }
+ lineStr.push(' ">');
+
+ if (!aFill) {
+ appendStroke(this, lineStr);
+ } else {
+ appendFill(this, lineStr, min, max);
+ }
+
+ lineStr.push('</g_vml_:shape>');
+
+ this.element_.insertAdjacentHTML('beforeEnd', lineStr.join(''));
+ };
+
+ function appendStroke(ctx, lineStr) {
+ var a = processStyle(ctx.strokeStyle);
+ var color = a.color;
+ var opacity = a.alpha * ctx.globalAlpha;
+ var lineWidth = ctx.lineScale_ * ctx.lineWidth;
+
+ // VML cannot correctly render a line if the width is less than 1px.
+ // In that case, we dilute the color to make the line look thinner.
+ if (lineWidth < 1) {
+ opacity *= lineWidth;
+ }
+
+ lineStr.push(
+ '<g_vml_:stroke',
+ ' opacity="', opacity, '"',
+ ' joinstyle="', ctx.lineJoin, '"',
+ ' miterlimit="', ctx.miterLimit, '"',
+ ' endcap="', processLineCap(ctx.lineCap), '"',
+ ' weight="', lineWidth, 'px"',
+ ' color="', color, '" />'
+ );
+ }
+
+ function appendFill(ctx, lineStr, min, max) {
+ var fillStyle = ctx.fillStyle;
+ var arcScaleX = ctx.arcScaleX_;
+ var arcScaleY = ctx.arcScaleY_;
+ var width = max.x - min.x;
+ var height = max.y - min.y;
+ if (fillStyle instanceof CanvasGradient_) {
+ // TODO: Gradients transformed with the transformation matrix.
+ var angle = 0;
+ var focus = {x: 0, y: 0};
+
+ // additional offset
+ var shift = 0;
+ // scale factor for offset
+ var expansion = 1;
+
+ if (fillStyle.type_ == 'gradient') {
+ var x0 = fillStyle.x0_ / arcScaleX;
+ var y0 = fillStyle.y0_ / arcScaleY;
+ var x1 = fillStyle.x1_ / arcScaleX;
+ var y1 = fillStyle.y1_ / arcScaleY;
+ var p0 = getCoords(ctx, x0, y0);
+ var p1 = getCoords(ctx, x1, y1);
+ var dx = p1.x - p0.x;
+ var dy = p1.y - p0.y;
+ angle = Math.atan2(dx, dy) * 180 / Math.PI;
+
+ // The angle should be a non-negative number.
+ if (angle < 0) {
+ angle += 360;
+ }
+
+ // Very small angles produce an unexpected result because they are
+ // converted to a scientific notation string.
+ if (angle < 1e-6) {
+ angle = 0;
+ }
+ } else {
+ var p0 = getCoords(ctx, fillStyle.x0_, fillStyle.y0_);
+ focus = {
+ x: (p0.x - min.x) / width,
+ y: (p0.y - min.y) / height
+ };
+
+ width /= arcScaleX * Z;
+ height /= arcScaleY * Z;
+ var dimension = m.max(width, height);
+ shift = 2 * fillStyle.r0_ / dimension;
+ expansion = 2 * fillStyle.r1_ / dimension - shift;
+ }
+
+ // We need to sort the color stops in ascending order by offset,
+ // otherwise IE won't interpret it correctly.
+ var stops = fillStyle.colors_;
+ stops.sort(function(cs1, cs2) {
+ return cs1.offset - cs2.offset;
+ });
+
+ var length = stops.length;
+ var color1 = stops[0].color;
+ var color2 = stops[length - 1].color;
+ var opacity1 = stops[0].alpha * ctx.globalAlpha;
+ var opacity2 = stops[length - 1].alpha * ctx.globalAlpha;
+
+ var colors = [];
+ for (var i = 0; i < length; i++) {
+ var stop = stops[i];
+ colors.push(stop.offset * expansion + shift + ' ' + stop.color);
+ }
+
+ // When colors attribute is used, the meanings of opacity and o:opacity2
+ // are reversed.
+ lineStr.push('<g_vml_:fill type="', fillStyle.type_, '"',
+ ' method="none" focus="100%"',
+ ' color="', color1, '"',
+ ' color2="', color2, '"',
+ ' colors="', colors.join(','), '"',
+ ' opacity="', opacity2, '"',
+ ' g_o_:opacity2="', opacity1, '"',
+ ' angle="', angle, '"',
+ ' focusposition="', focus.x, ',', focus.y, '" />');
+ } else if (fillStyle instanceof CanvasPattern_) {
+ if (width && height) {
+ var deltaLeft = -min.x;
+ var deltaTop = -min.y;
+ lineStr.push('<g_vml_:fill',
+ ' position="',
+ deltaLeft / width * arcScaleX * arcScaleX, ',',
+ deltaTop / height * arcScaleY * arcScaleY, '"',
+ ' type="tile"',
+ // TODO: Figure out the correct size to fit the scale.
+ //' size="', w, 'px ', h, 'px"',
+ ' src="', fillStyle.src_, '" />');
+ }
+ } else {
+ var a = processStyle(ctx.fillStyle);
+ var color = a.color;
+ var opacity = a.alpha * ctx.globalAlpha;
+ lineStr.push('<g_vml_:fill color="', color, '" opacity="', opacity,
+ '" />');
+ }
+ }
+
+ contextPrototype.fill = function() {
+ this.stroke(true);
+ };
+
+ contextPrototype.closePath = function() {
+ this.currentPath_.push({type: 'close'});
+ };
+
+ function getCoords(ctx, aX, aY) {
+ var m = ctx.m_;
+ return {
+ x: Z * (aX * m[0][0] + aY * m[1][0] + m[2][0]) - Z2,
+ y: Z * (aX * m[0][1] + aY * m[1][1] + m[2][1]) - Z2
+ };
+ };
+
+ contextPrototype.save = function() {
+ var o = {};
+ copyState(this, o);
+ this.aStack_.push(o);
+ this.mStack_.push(this.m_);
+ this.m_ = matrixMultiply(createMatrixIdentity(), this.m_);
+ };
+
+ contextPrototype.restore = function() {
+ if (this.aStack_.length) {
+ copyState(this.aStack_.pop(), this);
+ this.m_ = this.mStack_.pop();
+ }
+ };
+
+ function matrixIsFinite(m) {
+ return isFinite(m[0][0]) && isFinite(m[0][1]) &&
+ isFinite(m[1][0]) && isFinite(m[1][1]) &&
+ isFinite(m[2][0]) && isFinite(m[2][1]);
+ }
+
+ function setM(ctx, m, updateLineScale) {
+ if (!matrixIsFinite(m)) {
+ return;
+ }
+ ctx.m_ = m;
+
+ if (updateLineScale) {
+ // Get the line scale.
+ // Determinant of this.m_ means how much the area is enlarged by the
+ // transformation. So its square root can be used as a scale factor
+ // for width.
+ var det = m[0][0] * m[1][1] - m[0][1] * m[1][0];
+ ctx.lineScale_ = sqrt(abs(det));
+ }
+ }
+
+ contextPrototype.translate = function(aX, aY) {
+ var m1 = [
+ [1, 0, 0],
+ [0, 1, 0],
+ [aX, aY, 1]
+ ];
+
+ setM(this, matrixMultiply(m1, this.m_), false);
+ };
+
+ contextPrototype.rotate = function(aRot) {
+ var c = mc(aRot);
+ var s = ms(aRot);
+
+ var m1 = [
+ [c, s, 0],
+ [-s, c, 0],
+ [0, 0, 1]
+ ];
+
+ setM(this, matrixMultiply(m1, this.m_), false);
+ };
+
+ contextPrototype.scale = function(aX, aY) {
+ this.arcScaleX_ *= aX;
+ this.arcScaleY_ *= aY;
+ var m1 = [
+ [aX, 0, 0],
+ [0, aY, 0],
+ [0, 0, 1]
+ ];
+
+ setM(this, matrixMultiply(m1, this.m_), true);
+ };
+
+ contextPrototype.transform = function(m11, m12, m21, m22, dx, dy) {
+ var m1 = [
+ [m11, m12, 0],
+ [m21, m22, 0],
+ [dx, dy, 1]
+ ];
+
+ setM(this, matrixMultiply(m1, this.m_), true);
+ };
+
+ contextPrototype.setTransform = function(m11, m12, m21, m22, dx, dy) {
+ var m = [
+ [m11, m12, 0],
+ [m21, m22, 0],
+ [dx, dy, 1]
+ ];
+
+ setM(this, m, true);
+ };
+
+ /**
+ * The text drawing function.
+ * The maxWidth argument isn't taken in account, since no browser supports
+ * it yet.
+ */
+ contextPrototype.drawText_ = function(text, x, y, maxWidth, stroke) {
+ var m = this.m_,
+ delta = 1000,
+ left = 0,
+ right = delta,
+ offset = {x: 0, y: 0},
+ lineStr = [];
+
+ var fontStyle = getComputedStyle(processFontStyle(this.font), this.element_);
+
+ var fontStyleString = buildStyle(fontStyle);
+
+ var elementStyle = this.element_.currentStyle;
+ var textAlign = this.textAlign.toLowerCase();
+ switch (textAlign) {
+ case 'left':
+ case 'center':
+ case 'right':
+ break;
+ case 'end':
+ textAlign = elementStyle.direction == 'ltr' ? 'right' : 'left';
+ break;
+ case 'start':
+ textAlign = elementStyle.direction == 'rtl' ? 'right' : 'left';
+ break;
+ default:
+ textAlign = 'left';
+ }
+
+ // 1.75 is an arbitrary number, as there is no info about the text baseline
+ switch (this.textBaseline) {
+ case 'hanging':
+ case 'top':
+ offset.y = fontStyle.size / 1.75;
+ break;
+ case 'middle':
+ break;
+ default:
+ case null:
+ case 'alphabetic':
+ case 'ideographic':
+ case 'bottom':
+ offset.y = -fontStyle.size / 2.25;
+ break;
+ }
+
+ switch(textAlign) {
+ case 'right':
+ left = delta;
+ right = 0.05;
+ break;
+ case 'center':
+ left = right = delta / 2;
+ break;
+ }
+
+ var d = getCoords(this, x + offset.x, y + offset.y);
+
+ lineStr.push('<g_vml_:line from="', -left ,' 0" to="', right ,' 0.05" ',
+ ' coordsize="100 100" coordorigin="0 0"',
+ ' filled="', !stroke, '" stroked="', !!stroke,
+ '" style="position:absolute;width:1px;height:1px;">');
+
+ if (stroke) {
+ appendStroke(this, lineStr);
+ } else {
+ // TODO: Fix the min and max params.
+ appendFill(this, lineStr, {x: -left, y: 0},
+ {x: right, y: fontStyle.size});
+ }
+
+ var skewM = m[0][0].toFixed(3) + ',' + m[1][0].toFixed(3) + ',' +
+ m[0][1].toFixed(3) + ',' + m[1][1].toFixed(3) + ',0,0';
+
+ var skewOffset = mr(d.x / Z + 1 - m[0][0]) + ',' + mr(d.y / Z - 2 * m[1][0]);
+
+
+ lineStr.push('<g_vml_:skew on="t" matrix="', skewM ,'" ',
+ ' offset="', skewOffset, '" origin="', left ,' 0" />',
+ '<g_vml_:path textpathok="true" />',
+ '<g_vml_:textpath on="true" string="',
+ encodeHtmlAttribute(text),
+ '" style="v-text-align:', textAlign,
+ ';font:', encodeHtmlAttribute(fontStyleString),
+ '" /></g_vml_:line>');
+
+ this.element_.insertAdjacentHTML('beforeEnd', lineStr.join(''));
+ };
+
+ contextPrototype.fillText = function(text, x, y, maxWidth) {
+ this.drawText_(text, x, y, maxWidth, false);
+ };
+
+ contextPrototype.strokeText = function(text, x, y, maxWidth) {
+ this.drawText_(text, x, y, maxWidth, true);
+ };
+
+ contextPrototype.measureText = function(text) {
+ if (!this.textMeasureEl_) {
+ var s = '<span style="position:absolute;' +
+ 'top:-20000px;left:0;padding:0;margin:0;border:none;' +
+ 'white-space:pre;"></span>';
+ this.element_.insertAdjacentHTML('beforeEnd', s);
+ this.textMeasureEl_ = this.element_.lastChild;
+ }
+ var doc = this.element_.ownerDocument;
+ this.textMeasureEl_.innerHTML = '';
+ this.textMeasureEl_.style.font = this.font;
+ // Don't use innerHTML or innerText because they allow markup/whitespace.
+ this.textMeasureEl_.appendChild(doc.createTextNode(text));
+ return {width: this.textMeasureEl_.offsetWidth};
+ };
+
+ /******** STUBS ********/
+ contextPrototype.clip = function() {
+ // TODO: Implement
+ };
+
+ contextPrototype.arcTo = function() {
+ // TODO: Implement
+ };
+
+ contextPrototype.createPattern = function(image, repetition) {
+ return new CanvasPattern_(image, repetition);
+ };
+
+ // Gradient / Pattern Stubs
+ function CanvasGradient_(aType) {
+ this.type_ = aType;
+ this.x0_ = 0;
+ this.y0_ = 0;
+ this.r0_ = 0;
+ this.x1_ = 0;
+ this.y1_ = 0;
+ this.r1_ = 0;
+ this.colors_ = [];
+ }
+
+ CanvasGradient_.prototype.addColorStop = function(aOffset, aColor) {
+ aColor = processStyle(aColor);
+ this.colors_.push({offset: aOffset,
+ color: aColor.color,
+ alpha: aColor.alpha});
+ };
+
+ function CanvasPattern_(image, repetition) {
+ assertImageIsValid(image);
+ switch (repetition) {
+ case 'repeat':
+ case null:
+ case '':
+ this.repetition_ = 'repeat';
+ break
+ case 'repeat-x':
+ case 'repeat-y':
+ case 'no-repeat':
+ this.repetition_ = repetition;
+ break;
+ default:
+ throwException('SYNTAX_ERR');
+ }
+
+ this.src_ = image.src;
+ this.width_ = image.width;
+ this.height_ = image.height;
+ }
+
+ function throwException(s) {
+ throw new DOMException_(s);
+ }
+
+ function assertImageIsValid(img) {
+ if (!img || img.nodeType != 1 || img.tagName != 'IMG') {
+ throwException('TYPE_MISMATCH_ERR');
+ }
+ if (img.readyState != 'complete') {
+ throwException('INVALID_STATE_ERR');
+ }
+ }
+
+ function DOMException_(s) {
+ this.code = this[s];
+ this.message = s +': DOM Exception ' + this.code;
+ }
+ var p = DOMException_.prototype = new Error;
+ p.INDEX_SIZE_ERR = 1;
+ p.DOMSTRING_SIZE_ERR = 2;
+ p.HIERARCHY_REQUEST_ERR = 3;
+ p.WRONG_DOCUMENT_ERR = 4;
+ p.INVALID_CHARACTER_ERR = 5;
+ p.NO_DATA_ALLOWED_ERR = 6;
+ p.NO_MODIFICATION_ALLOWED_ERR = 7;
+ p.NOT_FOUND_ERR = 8;
+ p.NOT_SUPPORTED_ERR = 9;
+ p.INUSE_ATTRIBUTE_ERR = 10;
+ p.INVALID_STATE_ERR = 11;
+ p.SYNTAX_ERR = 12;
+ p.INVALID_MODIFICATION_ERR = 13;
+ p.NAMESPACE_ERR = 14;
+ p.INVALID_ACCESS_ERR = 15;
+ p.VALIDATION_ERR = 16;
+ p.TYPE_MISMATCH_ERR = 17;
+
+ // set up externs
+ G_vmlCanvasManager = G_vmlCanvasManager_;
+ CanvasRenderingContext2D = CanvasRenderingContext2D_;
+ CanvasGradient = CanvasGradient_;
+ CanvasPattern = CanvasPattern_;
+ DOMException = DOMException_;
+ G_vmlCanvasManager._version = 888;
+})();
+
+} // if