| Path : /var/www/html/mini-moneyexchange/public/assets/libs/flot/ |
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| Current File : /var/www/html/mini-moneyexchange/public/assets/libs/flot/excanvas.js |
// 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.
// * Filling very large shapes (above 5000 points) is buggy.
// * 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;
},
};
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 / 0.75;
} 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;
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 W = 10;
var H = 10;
// Divide the shape into chunks if it's too long because IE has a limit
// somewhere for how long a VML shape can be. This simple division does
// not work with fills, only strokes, unfortunately.
var chunkSize = 5000;
var min = { x: null, y: null };
var max = { x: null, y: null };
for (var j = 0; j < this.currentPath_.length; j += chunkSize) {
var lineStr = [];
var lineOpen = false;
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;
for (
var i = j;
i < Math.min(j + chunkSize, this.currentPath_.length);
i++
) {
if (i % chunkSize == 0 && i > 0) {
// move into position for next chunk
lineStr.push(
" m ",
mr(this.currentPath_[i - 1].x),
",",
mr(this.currentPath_[i - 1].y)
);
}
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) + "," + mr(d.y / Z);
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_;
})();
} // if