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Diffstat (limited to 'public/js/excanvas.js')
| -rw-r--r-- | public/js/excanvas.js | 1438 |
1 files changed, 0 insertions, 1438 deletions
diff --git a/public/js/excanvas.js b/public/js/excanvas.js deleted file mode 100644 index 4ca9653..0000000 --- a/public/js/excanvas.js +++ /dev/null @@ -1,1438 +0,0 @@ -// 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 |