X-Git-Url: https://adrianiainlam.tk/git/?a=blobdiff_plain;f=docs%2Fexcanvas.js;h=6a50563d7e385d35483c02184739509d8e6b4b36;hb=3bc2cb3c62dbc37db8ca4b58fd64807be78dccfa;hp=1d9ddb2661238991602844babdd5c18d7358b4fa;hpb=078d1d29424f0590cb9f1b7b2925bbbefadf0896;p=dygraphs.git

diff --git a/docs/excanvas.js b/docs/excanvas.js
deleted file mode 100644
index 1d9ddb2..0000000
--- a/docs/excanvas.js
+++ /dev/null
@@ -1,876 +0,0 @@
-// 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 are not implemented.
-// * 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;
-
-  /**
-   * 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)));
-    };
-  }
-
-  var G_vmlCanvasManager_ = {
-    init: function(opt_doc) {
-      if (/MSIE/.test(navigator.userAgent) && !window.opera) {
-        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) {
-      // create xmlns
-      if (!doc.namespaces['g_vml_']) {
-        doc.namespaces.add('g_vml_', 'urn:schemas-microsoft-com:vml',
-                           '#default#VML');
-
-      }
-      if (!doc.namespaces['g_o_']) {
-        doc.namespaces.add('g_o_', 'urn:schemas-microsoft-com:office:office',
-                           '#default#VML');
-      }
-
-      // 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}' +
-            'g_vml_\\:*{behavior:url(#default#VML)}' +
-            'g_o_\\:*{behavior:url(#default#VML)}';
-
-      }
-
-      // 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;
-
-        // 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;
-    }
-  };
-
-  function onPropertyChange(e) {
-    var el = e.srcElement;
-
-    switch (e.propertyName) {
-      case 'width':
-        el.style.width = el.attributes.width.nodeValue + 'px';
-        el.getContext().clearRect();
-        break;
-      case 'height':
-        el.style.height = el.attributes.height.nodeValue + 'px';
-        el.getContext().clearRect();
-        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 dec2hex = [];
-  for (var i = 0; i < 16; i++) {
-    for (var j = 0; j < 16; j++) {
-      dec2hex[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.arcScaleX_    = o1.arcScaleX_;
-    o2.arcScaleY_    = o1.arcScaleY_;
-    o2.lineScale_    = o1.lineScale_;
-  }
-
-  function processStyle(styleString) {
-    var str, alpha = 1;
-
-    styleString = String(styleString);
-    if (styleString.substring(0, 3) == 'rgb') {
-      var start = styleString.indexOf('(', 3);
-      var end = styleString.indexOf(')', start + 1);
-      var guts = styleString.substring(start + 1, end).split(',');
-
-      str = '#';
-      for (var i = 0; i < 3; i++) {
-        str += dec2hex[Number(guts[i])];
-      }
-
-      if (guts.length == 4 && styleString.substr(3, 1) == 'a') {
-        alpha = guts[3];
-      }
-    } else {
-      str = styleString;
-    }
-
-    return {color: str, alpha: alpha};
-  }
-
-  function processLineCap(lineCap) {
-    switch (lineCap) {
-      case 'butt':
-        return 'flat';
-      case 'round':
-        return 'round';
-      case 'square':
-      default:
-        return 'square';
-    }
-  }
-
-  /**
-   * This class implements CanvasRenderingContext2D interface as described by
-   * the WHATWG.
-   * @param {HTMLElement} surfaceElement The element that the 2D context should
-   * be associated with
-   */
-  function CanvasRenderingContext2D_(surfaceElement) {
-    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.canvas = surfaceElement;
-
-    var el = surfaceElement.ownerDocument.createElement('div');
-    el.style.width =  surfaceElement.clientWidth + 'px';
-    el.style.height = surfaceElement.clientHeight + 'px';
-    el.style.overflow = 'hidden';
-    el.style.position = 'absolute';
-    surfaceElement.appendChild(el);
-
-    this.element_ = el;
-    this.arcScaleX_ = 1;
-    this.arcScaleY_ = 1;
-    this.lineScale_ = 1;
-  }
-
-  var contextPrototype = CanvasRenderingContext2D_.prototype;
-  contextPrototype.clearRect = function() {
-    this.element_.innerHTML = '';
-    this.currentPath_ = [];
-  };
-
-  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 = this.getCoords_(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 = this.getCoords_(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 = this.getCoords_(aX, aY);
-    var cp1 = this.getCoords_(aCP1x, aCP1y);
-    var cp2 = this.getCoords_(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 = this.getCoords_(aCPx, aCPy);
-    var p = this.getCoords_(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 = this.getCoords_(aX, aY);
-    var pStart = this.getCoords_(xStart, yStart);
-    var pEnd = this.getCoords_(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) {
-    // Will destroy any existing path (same as FF behaviour)
-    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_ = [];
-  };
-
-  contextPrototype.fillRect = function(aX, aY, aWidth, aHeight) {
-    // Will destroy any existing path (same as FF behaviour)
-    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_ = [];
-  };
-
-  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 = this.getCoords_(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]) {
-      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 = this.getCoords_(dx + dw, dy);
-      var c3 = this.getCoords_(dx, dy + dh);
-      var c4 = this.getCoords_(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 a = processStyle(aFill ? this.fillStyle : this.strokeStyle);
-    var color = a.color;
-    var opacity = a.alpha * this.globalAlpha;
-
-    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) {
-      var lineWidth = this.lineScale_ * this.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="', this.lineJoin, '"',
-        ' miterlimit="', this.miterLimit, '"',
-        ' endcap="', processLineCap(this.lineCap), '"',
-        ' weight="', lineWidth, 'px"',
-        ' color="', color, '" />'
-      );
-    } else if (typeof this.fillStyle == 'object') {
-      var fillStyle = this.fillStyle;
-      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_ / this.arcScaleX_;
-        var y0 = fillStyle.y0_ / this.arcScaleY_;
-        var x1 = fillStyle.x1_ / this.arcScaleX_;
-        var y1 = fillStyle.y1_ / this.arcScaleY_;
-        var p0 = this.getCoords_(x0, y0);
-        var p1 = this.getCoords_(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 = this.getCoords_(fillStyle.x0_, fillStyle.y0_);
-        var width  = max.x - min.x;
-        var height = max.y - min.y;
-        focus = {
-          x: (p0.x - min.x) / width,
-          y: (p0.y - min.y) / height
-        };
-
-        width  /= this.arcScaleX_ * Z;
-        height /= this.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 * this.globalAlpha;
-      var opacity2 = stops[length - 1].alpha * this.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 {
-      lineStr.push('<g_vml_:fill color="', color, '" opacity="', opacity,
-                   '" />');
-    }
-
-    lineStr.push('</g_vml_:shape>');
-
-    this.element_.insertAdjacentHTML('beforeEnd', lineStr.join(''));
-  };
-
-  contextPrototype.fill = function() {
-    this.stroke(true);
-  }
-
-  contextPrototype.closePath = function() {
-    this.currentPath_.push({type: 'close'});
-  };
-
-  /**
-   * @private
-   */
-  contextPrototype.getCoords_ = function(aX, aY) {
-    var m = this.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() {
-    copyState(this.aStack_.pop(), this);
-    this.m_ = this.mStack_.pop();
-  };
-
-  contextPrototype.translate = function(aX, aY) {
-    var m1 = [
-      [1,  0,  0],
-      [0,  1,  0],
-      [aX, aY, 1]
-    ];
-
-    this.m_ = matrixMultiply(m1, this.m_);
-  };
-
-  contextPrototype.rotate = function(aRot) {
-    var c = mc(aRot);
-    var s = ms(aRot);
-
-    var m1 = [
-      [c,  s, 0],
-      [-s, c, 0],
-      [0,  0, 1]
-    ];
-
-    this.m_ = matrixMultiply(m1, this.m_);
-  };
-
-  contextPrototype.scale = function(aX, aY) {
-    this.arcScaleX_ *= aX;
-    this.arcScaleY_ *= aY;
-    var m1 = [
-      [aX, 0,  0],
-      [0,  aY, 0],
-      [0,  0,  1]
-    ];
-
-    var m = this.m_ = matrixMultiply(m1, this.m_);
-
-    // 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];
-    this.lineScale_ = sqrt(abs(det));
-  };
-
-  /******** STUBS ********/
-  contextPrototype.clip = function() {
-    // TODO: Implement
-  };
-
-  contextPrototype.arcTo = function() {
-    // TODO: Implement
-  };
-
-  contextPrototype.createPattern = function() {
-    return new CanvasPattern_;
-  };
-
-  // 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_() {}
-
-  // set up externs
-  G_vmlCanvasManager = G_vmlCanvasManager_;
-  CanvasRenderingContext2D = CanvasRenderingContext2D_;
-  CanvasGradient = CanvasGradient_;
-  CanvasPattern = CanvasPattern_;
-
-})();
-
-} // if
diff --git a/docs/excanvas.js b/docs/excanvas.js
new file mode 120000
index 0000000..6a50563
--- /dev/null
+++ b/docs/excanvas.js
@@ -0,0 +1 @@
+../excanvas.js
\ No newline at end of file