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Commit 15f3cc95 authored by olau@iola.dk's avatar olau@iola.dk
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Updated excanvas from SVN, with the patch in issue 50... 

Updated excanvas from SVN, with the patch in issue 50 (http://code.google.com/p/explorercanvas/issues/detail?id=50) applied


git-svn-id: https://flot.googlecode.com/svn/trunk@217 1e0a6537-2640-0410-bfb7-f154510ff394
parent 563349c9
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excanvas.js
View file @ 15f3cc95
...@@ -15,7 +15,7 @@ ...@@ -15,7 +15,7 @@
// Known Issues: // Known Issues:
// //
// * Patterns are not implemented. // * Patterns only support repeat.
// * Radial gradient are not implemented. The VML version of these look very // * Radial gradient are not implemented. The VML version of these look very
// different from the canvas one. // different from the canvas one.
// * Clipping paths are not implemented. // * Clipping paths are not implemented.
...@@ -29,6 +29,7 @@ ...@@ -29,6 +29,7 @@
// or use Box Sizing Behavior from WebFX // or use Box Sizing Behavior from WebFX
// (http://webfx.eae.net/dhtml/boxsizing/boxsizing.html) // (http://webfx.eae.net/dhtml/boxsizing/boxsizing.html)
// * Non uniform scaling does not correctly scale strokes. // * 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. // * Optimize. There is always room for speed improvements.
// Only add this code if we do not already have a canvas implementation // Only add this code if we do not already have a canvas implementation
...@@ -83,6 +84,35 @@ if (!document.createElement('canvas').getContext) { ...@@ -83,6 +84,35 @@ if (!document.createElement('canvas').getContext) {
}; };
} }
function encodeHtmlAttribute(s) {
return String(s).replace(/&/g, '&').replace(/"/g, '"');
}
function addNamespacesAndStylesheet(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}';
}
}
// Add namespaces and stylesheet at startup.
addNamespacesAndStylesheet(document);
var G_vmlCanvasManager_ = { var G_vmlCanvasManager_ = {
init: function(opt_doc) { init: function(opt_doc) {
if (/MSIE/.test(navigator.userAgent) && !window.opera) { if (/MSIE/.test(navigator.userAgent) && !window.opera) {
...@@ -95,29 +125,6 @@ if (!document.createElement('canvas').getContext) { ...@@ -95,29 +125,6 @@ if (!document.createElement('canvas').getContext) {
}, },
init_: function(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 // find all canvas elements
var els = doc.getElementsByTagName('canvas'); var els = doc.getElementsByTagName('canvas');
for (var i = 0; i < els.length; i++) { for (var i = 0; i < els.length; i++) {
...@@ -135,9 +142,11 @@ if (!document.createElement('canvas').getContext) { ...@@ -135,9 +142,11 @@ if (!document.createElement('canvas').getContext) {
*/ */
initElement: function(el) { initElement: function(el) {
if (!el.getContext) { if (!el.getContext) {
el.getContext = 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 // Remove fallback content. There is no way to hide text nodes so we
// just remove all childNodes. We could hide all elements and remove // just remove all childNodes. We could hide all elements and remove
// text nodes but who really cares about the fallback content. // text nodes but who really cares about the fallback content.
...@@ -173,12 +182,15 @@ if (!document.createElement('canvas').getContext) { ...@@ -173,12 +182,15 @@ if (!document.createElement('canvas').getContext) {
switch (e.propertyName) { switch (e.propertyName) {
case 'width': case 'width':
el.style.width = el.attributes.width.nodeValue + 'px';
el.getContext().clearRect(); 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; break;
case 'height': case 'height':
el.style.height = el.attributes.height.nodeValue + 'px';
el.getContext().clearRect(); el.getContext().clearRect();
el.style.height = el.attributes.height.nodeValue + 'px';
el.firstChild.style.height = el.clientHeight + 'px';
break; break;
} }
} }
...@@ -194,10 +206,10 @@ if (!document.createElement('canvas').getContext) { ...@@ -194,10 +206,10 @@ if (!document.createElement('canvas').getContext) {
G_vmlCanvasManager_.init(); G_vmlCanvasManager_.init();
// precompute "00" to "FF" // precompute "00" to "FF"
var dec2hex = []; var decToHex = [];
for (var i = 0; i < 16; i++) { for (var i = 0; i < 16; i++) {
for (var j = 0; j < 16; j++) { for (var j = 0; j < 16; j++) {
dec2hex[i * 16 + j] = i.toString(16) + j.toString(16); decToHex[i * 16 + j] = i.toString(16) + j.toString(16);
} }
} }
...@@ -238,33 +250,304 @@ if (!document.createElement('canvas').getContext) { ...@@ -238,33 +250,304 @@ if (!document.createElement('canvas').getContext) {
o2.shadowOffsetY = o1.shadowOffsetY; o2.shadowOffsetY = o1.shadowOffsetY;
o2.strokeStyle = o1.strokeStyle; o2.strokeStyle = o1.strokeStyle;
o2.globalAlpha = o1.globalAlpha; o2.globalAlpha = o1.globalAlpha;
o2.font = o1.font;
o2.textAlign = o1.textAlign;
o2.textBaseline = o1.textBaseline;
o2.arcScaleX_ = o1.arcScaleX_; o2.arcScaleX_ = o1.arcScaleX_;
o2.arcScaleY_ = o1.arcScaleY_; o2.arcScaleY_ = o1.arcScaleY_;
o2.lineScale_ = o1.lineScale_; 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.substr(3, 1) == 'a') {
alpha = Number(parts[3]);
} else {
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 = 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;
}
function processStyle(styleString) { function processStyle(styleString) {
var str, alpha = 1; var str, alpha = 1;
styleString = String(styleString); styleString = String(styleString);
if (styleString.substring(0, 3) == 'rgb') { if (styleString.charAt(0) == '#') {
var start = styleString.indexOf('(', 3); str = styleString;
var end = styleString.indexOf(')', start + 1); } else if (/^rgb/.test(styleString)) {
var guts = styleString.substring(start + 1, end).split(','); var parts = getRgbHslContent(styleString);
var str = '#', n;
str = '#';
for (var i = 0; i < 3; i++) { for (var i = 0; i < 3; i++) {
str += dec2hex[Number(guts[i])]; if (parts[i].indexOf('%') != -1) {
n = Math.floor(percent(parts[i]) * 255);
} else {
n = Number(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 {color: str, alpha: alpha};
}
if (guts.length == 4 && styleString.substr(3, 1) == 'a') { var DEFAULT_STYLE = {
alpha = guts[3]; 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 { } else {
str = styleString; computedStyle.size = canvasFontSize;
} }
return {color: str, alpha: alpha}; // 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;
} }
function processLineCap(lineCap) { function processLineCap(lineCap) {
...@@ -301,6 +584,9 @@ if (!document.createElement('canvas').getContext) { ...@@ -301,6 +584,9 @@ if (!document.createElement('canvas').getContext) {
this.lineCap = 'butt'; this.lineCap = 'butt';
this.miterLimit = Z * 1; this.miterLimit = Z * 1;
this.globalAlpha = 1; this.globalAlpha = 1;
this.font = '10px sans-serif';
this.textAlign = 'left';
this.textBaseline = 'alphabetic';
this.canvas = surfaceElement; this.canvas = surfaceElement;
var el = surfaceElement.ownerDocument.createElement('div'); var el = surfaceElement.ownerDocument.createElement('div');
...@@ -318,6 +604,10 @@ if (!document.createElement('canvas').getContext) { ...@@ -318,6 +604,10 @@ if (!document.createElement('canvas').getContext) {
var contextPrototype = CanvasRenderingContext2D_.prototype; var contextPrototype = CanvasRenderingContext2D_.prototype;
contextPrototype.clearRect = function() { contextPrototype.clearRect = function() {
if (this.textMeasureEl_) {
this.textMeasureEl_.removeNode(true);
this.textMeasureEl_ = null;
}
this.element_.innerHTML = ''; this.element_.innerHTML = '';
}; };
...@@ -539,7 +829,8 @@ if (!document.createElement('canvas').getContext) { ...@@ -539,7 +829,8 @@ if (!document.createElement('canvas').getContext) {
// The following check doesn't account for skews (which don't exist // The following check doesn't account for skews (which don't exist
// in the canvas spec (yet) anyway. // in the canvas spec (yet) anyway.
if (this.m_[0][0] != 1 || this.m_[0][1]) { if (this.m_[0][0] != 1 || this.m_[0][1] ||
this.m_[1][1] != 1 || this.m_[1][0]) {
var filter = []; var filter = [];
// Note the 12/21 reversal // Note the 12/21 reversal
...@@ -562,7 +853,8 @@ if (!document.createElement('canvas').getContext) { ...@@ -562,7 +853,8 @@ if (!document.createElement('canvas').getContext) {
vmlStr.push('padding:0 ', mr(max.x / Z), 'px ', mr(max.y / Z), vmlStr.push('padding:0 ', mr(max.x / Z), 'px ', mr(max.y / Z),
'px 0;filter:progid:DXImageTransform.Microsoft.Matrix(', 'px 0;filter:progid:DXImageTransform.Microsoft.Matrix(',
filter.join(''), ", sizingmethod='clip');") filter.join(''), ", sizingmethod='clip');");
} else { } else {
vmlStr.push('top:', mr(d.y / Z), 'px;left:', mr(d.x / Z), 'px;'); vmlStr.push('top:', mr(d.y / Z), 'px;left:', mr(d.x / Z), 'px;');
} }
...@@ -570,7 +862,7 @@ if (!document.createElement('canvas').getContext) { ...@@ -570,7 +862,7 @@ if (!document.createElement('canvas').getContext) {
vmlStr.push(' ">' , vmlStr.push(' ">' ,
'<g_vml_:image src="', image.src, '"', '<g_vml_:image src="', image.src, '"',
' style="width:', Z * dw, 'px;', ' style="width:', Z * dw, 'px;',
' height:', Z * dh, 'px;"', ' height:', Z * dh, 'px"',
' cropleft="', sx / w, '"', ' cropleft="', sx / w, '"',
' croptop="', sy / h, '"', ' croptop="', sy / h, '"',
' cropright="', (w - sx - sw) / w, '"', ' cropright="', (w - sx - sw) / w, '"',
...@@ -578,108 +870,138 @@ if (!document.createElement('canvas').getContext) { ...@@ -578,108 +870,138 @@ if (!document.createElement('canvas').getContext) {
' />', ' />',
'</g_vml_:group>'); '</g_vml_:group>');
this.element_.insertAdjacentHTML('BeforeEnd', this.element_.insertAdjacentHTML('BeforeEnd', vmlStr.join(''));
vmlStr.join(''));
}; };
contextPrototype.stroke = function(aFill) { 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 W = 10;
var H = 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;
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 min = {x: null, y: null};
var max = {x: null, y: null}; var max = {x: null, y: null};
for (var i = 0; i < this.currentPath_.length; i++) { for (var j = 0; j < this.currentPath_.length; j += chunkSize) {
var p = this.currentPath_[i]; var lineStr = [];
var c; var lineOpen = false;
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;
}
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="');
// TODO: Following is broken for curves due to var newSeq = false;
// move to proper paths.
// Figure out dimensions so we can do gradient fills for (var i = j; i < Math.min(j + chunkSize, this.currentPath_.length); i++) {
// properly if (i % chunkSize == 0 && i > 0) { // move into position for next chunk
if (p) { lineStr.push(' m ', mr(this.currentPath_[i-1].x), ',', mr(this.currentPath_[i-1].y));
if (min.x == null || p.x < min.x) {
min.x = p.x;
} }
if (max.x == null || p.x > max.x) {
max.x = p.x; var p = this.currentPath_[i];
} var c;
if (min.y == null || p.y < min.y) {
min.y = p.y; 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;
} }
if (max.y == null || p.y > max.y) {
max.y = p.y;
// 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(''));
} }
lineStr.push(' ">'); };
if (!aFill) { function appendStroke(ctx, lineStr) {
var lineWidth = this.lineScale_ * this.lineWidth; 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. // 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. // In that case, we dilute the color to make the line look thinner.
if (lineWidth < 1) { if (lineWidth < 1) {
opacity *= lineWidth; opacity *= lineWidth;
} }
lineStr.push(
'<g_vml_:stroke',
' opacity="', opacity, '"',
' joinstyle="', ctx.lineJoin, '"',
' miterlimit="', ctx.miterLimit, '"',
' endcap="', processLineCap(ctx.lineCap), '"',
' weight="', lineWidth, 'px"',
' color="', color, '" />'
);
}
lineStr.push( function appendFill(ctx, lineStr, min, max) {
'<g_vml_:stroke', var fillStyle = ctx.fillStyle;
' opacity="', opacity, '"', var arcScaleX = ctx.arcScaleX_;
' joinstyle="', this.lineJoin, '"', var arcScaleY = ctx.arcScaleY_;
' miterlimit="', this.miterLimit, '"', var width = max.x - min.x;
' endcap="', processLineCap(this.lineCap), '"', var height = max.y - min.y;
' weight="', lineWidth, 'px"', if (fillStyle instanceof CanvasGradient_) {
' color="', color, '" />' // TODO: Gradients transformed with the transformation matrix.
);
} else if (typeof this.fillStyle == 'object') {
var fillStyle = this.fillStyle;
var angle = 0; var angle = 0;
var focus = {x: 0, y: 0}; var focus = {x: 0, y: 0};
...@@ -689,12 +1011,12 @@ if (!document.createElement('canvas').getContext) { ...@@ -689,12 +1011,12 @@ if (!document.createElement('canvas').getContext) {
var expansion = 1; var expansion = 1;
if (fillStyle.type_ == 'gradient') { if (fillStyle.type_ == 'gradient') {
var x0 = fillStyle.x0_ / this.arcScaleX_; var x0 = fillStyle.x0_ / arcScaleX;
var y0 = fillStyle.y0_ / this.arcScaleY_; var y0 = fillStyle.y0_ / arcScaleY;
var x1 = fillStyle.x1_ / this.arcScaleX_; var x1 = fillStyle.x1_ / arcScaleX;
var y1 = fillStyle.y1_ / this.arcScaleY_; var y1 = fillStyle.y1_ / arcScaleY;
var p0 = this.getCoords_(x0, y0); var p0 = ctx.getCoords_(x0, y0);
var p1 = this.getCoords_(x1, y1); var p1 = ctx.getCoords_(x1, y1);
var dx = p1.x - p0.x; var dx = p1.x - p0.x;
var dy = p1.y - p0.y; var dy = p1.y - p0.y;
angle = Math.atan2(dx, dy) * 180 / Math.PI; angle = Math.atan2(dx, dy) * 180 / Math.PI;
...@@ -710,16 +1032,14 @@ if (!document.createElement('canvas').getContext) { ...@@ -710,16 +1032,14 @@ if (!document.createElement('canvas').getContext) {
angle = 0; angle = 0;
} }
} else { } else {
var p0 = this.getCoords_(fillStyle.x0_, fillStyle.y0_); var p0 = ctx.getCoords_(fillStyle.x0_, fillStyle.y0_);
var width = max.x - min.x;
var height = max.y - min.y;
focus = { focus = {
x: (p0.x - min.x) / width, x: (p0.x - min.x) / width,
y: (p0.y - min.y) / height y: (p0.y - min.y) / height
}; };
width /= this.arcScaleX_ * Z; width /= arcScaleX * Z;
height /= this.arcScaleY_ * Z; height /= arcScaleY * Z;
var dimension = m.max(width, height); var dimension = m.max(width, height);
shift = 2 * fillStyle.r0_ / dimension; shift = 2 * fillStyle.r0_ / dimension;
expansion = 2 * fillStyle.r1_ / dimension - shift; expansion = 2 * fillStyle.r1_ / dimension - shift;
...@@ -735,8 +1055,8 @@ if (!document.createElement('canvas').getContext) { ...@@ -735,8 +1055,8 @@ if (!document.createElement('canvas').getContext) {
var length = stops.length; var length = stops.length;
var color1 = stops[0].color; var color1 = stops[0].color;
var color2 = stops[length - 1].color; var color2 = stops[length - 1].color;
var opacity1 = stops[0].alpha * this.globalAlpha; var opacity1 = stops[0].alpha * ctx.globalAlpha;
var opacity2 = stops[length - 1].alpha * this.globalAlpha; var opacity2 = stops[length - 1].alpha * ctx.globalAlpha;
var colors = []; var colors = [];
for (var i = 0; i < length; i++) { for (var i = 0; i < length; i++) {
...@@ -755,19 +1075,31 @@ if (!document.createElement('canvas').getContext) { ...@@ -755,19 +1075,31 @@ if (!document.createElement('canvas').getContext) {
' g_o_:opacity2="', opacity1, '"', ' g_o_:opacity2="', opacity1, '"',
' angle="', angle, '"', ' angle="', angle, '"',
' focusposition="', focus.x, ',', focus.y, '" />'); ' 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 { } 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, lineStr.push('<g_vml_:fill color="', color, '" opacity="', opacity,
'" />'); '" />');
} }
}
lineStr.push('</g_vml_:shape>');
this.element_.insertAdjacentHTML('beforeEnd', lineStr.join(''));
};
contextPrototype.fill = function() { contextPrototype.fill = function() {
this.stroke(true); this.stroke(true);
} };
contextPrototype.closePath = function() { contextPrototype.closePath = function() {
this.currentPath_.push({type: 'close'}); this.currentPath_.push({type: 'close'});
...@@ -781,7 +1113,7 @@ if (!document.createElement('canvas').getContext) { ...@@ -781,7 +1113,7 @@ if (!document.createElement('canvas').getContext) {
return { return {
x: Z * (aX * m[0][0] + aY * m[1][0] + m[2][0]) - Z2, 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 y: Z * (aX * m[0][1] + aY * m[1][1] + m[2][1]) - Z2
} };
}; };
contextPrototype.save = function() { contextPrototype.save = function() {
...@@ -793,19 +1125,16 @@ if (!document.createElement('canvas').getContext) { ...@@ -793,19 +1125,16 @@ if (!document.createElement('canvas').getContext) {
}; };
contextPrototype.restore = function() { contextPrototype.restore = function() {
copyState(this.aStack_.pop(), this); if (this.aStack_.length) {
this.m_ = this.mStack_.pop(); copyState(this.aStack_.pop(), this);
this.m_ = this.mStack_.pop();
}
}; };
function matrixIsFinite(m) { function matrixIsFinite(m) {
for (var j = 0; j < 3; j++) { return isFinite(m[0][0]) && isFinite(m[0][1]) &&
for (var k = 0; k < 2; k++) { isFinite(m[1][0]) && isFinite(m[1][1]) &&
if (!isFinite(m[j][k]) || isNaN(m[j][k])) { isFinite(m[2][0]) && isFinite(m[2][1]);
return false;
}
}
}
return true;
} }
function setM(ctx, m, updateLineScale) { function setM(ctx, m, updateLineScale) {
...@@ -879,6 +1208,124 @@ if (!document.createElement('canvas').getContext) { ...@@ -879,6 +1208,124 @@ if (!document.createElement('canvas').getContext) {
setM(this, m, true); 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 = this.getCoords_(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 ********/ /******** STUBS ********/
contextPrototype.clip = function() { contextPrototype.clip = function() {
// TODO: Implement // TODO: Implement
...@@ -888,8 +1335,8 @@ if (!document.createElement('canvas').getContext) { ...@@ -888,8 +1335,8 @@ if (!document.createElement('canvas').getContext) {
// TODO: Implement // TODO: Implement
}; };
contextPrototype.createPattern = function() { contextPrototype.createPattern = function(image, repetition) {
return new CanvasPattern_; return new CanvasPattern_(image, repetition);
}; };
// Gradient / Pattern Stubs // Gradient / Pattern Stubs
...@@ -911,14 +1358,70 @@ if (!document.createElement('canvas').getContext) { ...@@ -911,14 +1358,70 @@ if (!document.createElement('canvas').getContext) {
alpha: aColor.alpha}); alpha: aColor.alpha});
}; };
function CanvasPattern_() {} 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 // set up externs
G_vmlCanvasManager = G_vmlCanvasManager_; G_vmlCanvasManager = G_vmlCanvasManager_;
CanvasRenderingContext2D = CanvasRenderingContext2D_; CanvasRenderingContext2D = CanvasRenderingContext2D_;
CanvasGradient = CanvasGradient_; CanvasGradient = CanvasGradient_;
CanvasPattern = CanvasPattern_; CanvasPattern = CanvasPattern_;
DOMException = DOMException_;
})(); })();
} // if } // if
excanvas.min.js
View file @ 15f3cc95
if(!document.createElement("canvas").getContext){(function(){var S=Math;var T=S.round;var P=S.sin;var c=S.cos;var K=S.abs;var b=S.sqrt;var A=10;var L=A/2;function H(){return this.context_||(this.context_=new N(this))}var R=Array.prototype.slice;function d(e,g,h){var Z=R.call(arguments,2);return function(){return e.apply(g,Z.concat(R.call(arguments)))}}var I={init:function(Z){if(/MSIE/.test(navigator.userAgent)&&!window.opera){var e=Z||document;e.createElement("canvas");e.attachEvent("onreadystatechange",d(this.init_,this,e))}},init_:function(g){if(!g.namespaces.g_vml_){g.namespaces.add("g_vml_","urn:schemas-microsoft-com:vml","#default#VML")}if(!g.namespaces.g_o_){g.namespaces.add("g_o_","urn:schemas-microsoft-com:office:office","#default#VML")}if(!g.styleSheets.ex_canvas_){var f=g.createStyleSheet();f.owningElement.id="ex_canvas_";f.cssText="canvas{display:inline-block;overflow:hidden;text-align:left;width:300px;height:150px}g_vml_\\:*{behavior:url(#default#VML)}g_o_\\:*{behavior:url(#default#VML)}"}var e=g.getElementsByTagName("canvas");for(var Z=0;Z<e.length;Z++){this.initElement(e[Z])}},initElement:function(e){if(!e.getContext){e.getContext=H;e.innerHTML="";e.attachEvent("onpropertychange",a);e.attachEvent("onresize",B);var Z=e.attributes;if(Z.width&&Z.width.specified){e.style.width=Z.width.nodeValue+"px"}else{e.width=e.clientWidth}if(Z.height&&Z.height.specified){e.style.height=Z.height.nodeValue+"px"}else{e.height=e.clientHeight}}return e}};function a(f){var Z=f.srcElement;switch(f.propertyName){case"width":Z.style.width=Z.attributes.width.nodeValue+"px";Z.getContext().clearRect();break;case"height":Z.style.height=Z.attributes.height.nodeValue+"px";Z.getContext().clearRect();break}}function B(f){var Z=f.srcElement;if(Z.firstChild){Z.firstChild.style.width=Z.clientWidth+"px";Z.firstChild.style.height=Z.clientHeight+"px"}}I.init();var E=[];for(var W=0;W<16;W++){for(var V=0;V<16;V++){E[W*16+V]=W.toString(16)+V.toString(16)}}function O(){return[[1,0,0],[0,1,0],[0,0,1]]}function D(g,f){var e=O();for(var Z=0;Z<3;Z++){for(var j=0;j<3;j++){var h=0;for(var i=0;i<3;i++){h+=g[Z][i]*f[i][j]}e[Z][j]=h}}return e}function U(e,Z){Z.fillStyle=e.fillStyle;Z.lineCap=e.lineCap;Z.lineJoin=e.lineJoin;Z.lineWidth=e.lineWidth;Z.miterLimit=e.miterLimit;Z.shadowBlur=e.shadowBlur;Z.shadowColor=e.shadowColor;Z.shadowOffsetX=e.shadowOffsetX;Z.shadowOffsetY=e.shadowOffsetY;Z.strokeStyle=e.strokeStyle;Z.globalAlpha=e.globalAlpha;Z.arcScaleX_=e.arcScaleX_;Z.arcScaleY_=e.arcScaleY_;Z.lineScale_=e.lineScale_}function C(e){var h,g=1;e=String(e);if(e.substring(0,3)=="rgb"){var k=e.indexOf("(",3);var Z=e.indexOf(")",k+1);var j=e.substring(k+1,Z).split(",");h="#";for(var f=0;f<3;f++){h+=E[Number(j[f])]}if(j.length==4&&e.substr(3,1)=="a"){g=j[3]}}else{h=e}return{color:h,alpha:g}}function Q(Z){switch(Z){case"butt":return"flat";case"round":return"round";case"square":default:return"square"}}function N(e){this.m_=O();this.mStack_=[];this.aStack_=[];this.currentPath_=[];this.strokeStyle="#000";this.fillStyle="#000";this.lineWidth=1;this.lineJoin="miter";this.lineCap="butt";this.miterLimit=A*1;this.globalAlpha=1;this.canvas=e;var Z=e.ownerDocument.createElement("div");Z.style.width=e.clientWidth+"px";Z.style.height=e.clientHeight+"px";Z.style.overflow="hidden";Z.style.position="absolute";e.appendChild(Z);this.element_=Z;this.arcScaleX_=1;this.arcScaleY_=1;this.lineScale_=1}var J=N.prototype;J.clearRect=function(){this.element_.innerHTML=""};J.beginPath=function(){this.currentPath_=[]};J.moveTo=function(e,Z){var f=this.getCoords_(e,Z);this.currentPath_.push({type:"moveTo",x:f.x,y:f.y});this.currentX_=f.x;this.currentY_=f.y};J.lineTo=function(e,Z){var f=this.getCoords_(e,Z);this.currentPath_.push({type:"lineTo",x:f.x,y:f.y});this.currentX_=f.x;this.currentY_=f.y};J.bezierCurveTo=function(f,e,l,k,j,h){var Z=this.getCoords_(j,h);var i=this.getCoords_(f,e);var g=this.getCoords_(l,k);M(this,i,g,Z)};function M(Z,g,f,e){Z.currentPath_.push({type:"bezierCurveTo",cp1x:g.x,cp1y:g.y,cp2x:f.x,cp2y:f.y,x:e.x,y:e.y});Z.currentX_=e.x;Z.currentY_=e.y}J.quadraticCurveTo=function(j,f,e,Z){var i=this.getCoords_(j,f);var h=this.getCoords_(e,Z);var k={x:this.currentX_+2/3*(i.x-this.currentX_),y:this.currentY_+2/3*(i.y-this.currentY_)};var g={x:k.x+(h.x-this.currentX_)/3,y:k.y+(h.y-this.currentY_)/3};M(this,k,g,h)};J.arc=function(m,k,l,h,e,f){l*=A;var r=f?"at":"wa";var n=m+c(h)*l-L;var q=k+P(h)*l-L;var Z=m+c(e)*l-L;var o=k+P(e)*l-L;if(n==Z&&!f){n+=0.125}var g=this.getCoords_(m,k);var j=this.getCoords_(n,q);var 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