1
// Copyright 2006 Google Inc.
3
// Licensed under the Apache License, Version 2.0 (the "License");
4
// you may not use this file except in compliance with the License.
5
// You may obtain a copy of the License at
7
// http://www.apache.org/licenses/LICENSE-2.0
9
// Unless required by applicable law or agreed to in writing, software
10
// distributed under the License is distributed on an "AS IS" BASIS,
11
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12
// See the License for the specific language governing permissions and
13
// limitations under the License.
18
// * Patterns are not implemented.
19
// * Radial gradient are not implemented. The VML version of these look very
20
// different from the canvas one.
21
// * Clipping paths are not implemented.
22
// * Coordsize. The width and height attribute have higher priority than the
23
// width and height style values which isn't correct.
24
// * Painting mode isn't implemented.
25
// * Canvas width/height should is using content-box by default. IE in
26
// Quirks mode will draw the canvas using border-box. Either change your
28
// (http://www.whatwg.org/specs/web-apps/current-work/#the-doctype)
29
// or use Box Sizing Behavior from WebFX
30
// (http://webfx.eae.net/dhtml/boxsizing/boxsizing.html)
31
// * Non uniform scaling does not correctly scale strokes.
32
// * Optimize. There is always room for speed improvements.
34
// Only add this code if we do not already have a canvas implementation
35
if (!document.createElement('canvas').getContext) {
39
// alias some functions to make (compiled) code shorter
47
// this is used for sub pixel precision
52
* This funtion is assigned to the <canvas> elements as element.getContext().
54
* @return {CanvasRenderingContext2D_}
56
function getContext() {
57
return this.context_ ||
58
(this.context_ = new CanvasRenderingContext2D_(this));
61
var slice = Array.prototype.slice;
64
* Binds a function to an object. The returned function will always use the
65
* passed in {@code obj} as {@code this}.
69
* g = bind(f, obj, a, b)
70
* g(c, d) // will do f.call(obj, a, b, c, d)
72
* @param {Function} f The function to bind the object to
73
* @param {Object} obj The object that should act as this when the function
75
* @param {*} var_args Rest arguments that will be used as the initial
76
* arguments when the function is called
77
* @return {Function} A new function that has bound this
79
function bind(f, obj, var_args) {
80
var a = slice.call(arguments, 2);
82
return f.apply(obj, a.concat(slice.call(arguments)));
86
var G_vmlCanvasManager_ = {
87
init: function(opt_doc) {
88
if (/MSIE/.test(navigator.userAgent) && !window.opera) {
89
var doc = opt_doc || document;
90
// Create a dummy element so that IE will allow canvas elements to be
92
doc.createElement('canvas');
93
doc.attachEvent('onreadystatechange', bind(this.init_, this, doc));
97
init_: function(doc) {
99
if (!doc.namespaces['g_vml_']) {
100
doc.namespaces.add('g_vml_', 'urn:schemas-microsoft-com:vml',
104
if (!doc.namespaces['g_o_']) {
105
doc.namespaces.add('g_o_', 'urn:schemas-microsoft-com:office:office',
109
// Setup default CSS. Only add one style sheet per document
110
if (!doc.styleSheets['ex_canvas_']) {
111
var ss = doc.createStyleSheet();
112
ss.owningElement.id = 'ex_canvas_';
113
ss.cssText = 'canvas{display:inline-block;overflow:hidden;' +
114
// default size is 300x150 in Gecko and Opera
115
'text-align:left;width:300px;height:150px}' +
116
'g_vml_\\:*{behavior:url(#default#VML)}' +
117
'g_o_\\:*{behavior:url(#default#VML)}';
121
// find all canvas elements
122
var els = doc.getElementsByTagName('canvas');
123
for (var i = 0; i < els.length; i++) {
124
this.initElement(els[i]);
129
* Public initializes a canvas element so that it can be used as canvas
130
* element from now on. This is called automatically before the page is
131
* loaded but if you are creating elements using createElement you need to
132
* make sure this is called on the element.
133
* @param {HTMLElement} el The canvas element to initialize.
134
* @return {HTMLElement} the element that was created.
136
initElement: function(el) {
137
if (!el.getContext) {
139
el.getContext = getContext;
141
// Remove fallback content. There is no way to hide text nodes so we
142
// just remove all childNodes. We could hide all elements and remove
143
// text nodes but who really cares about the fallback content.
146
// do not use inline function because that will leak memory
147
el.attachEvent('onpropertychange', onPropertyChange);
148
el.attachEvent('onresize', onResize);
150
var attrs = el.attributes;
151
if (attrs.width && attrs.width.specified) {
152
// TODO: use runtimeStyle and coordsize
153
// el.getContext().setWidth_(attrs.width.nodeValue);
154
el.style.width = attrs.width.nodeValue + 'px';
156
el.width = el.clientWidth;
158
if (attrs.height && attrs.height.specified) {
159
// TODO: use runtimeStyle and coordsize
160
// el.getContext().setHeight_(attrs.height.nodeValue);
161
el.style.height = attrs.height.nodeValue + 'px';
163
el.height = el.clientHeight;
165
//el.getContext().setCoordsize_()
171
function onPropertyChange(e) {
172
var el = e.srcElement;
174
switch (e.propertyName) {
176
el.style.width = el.attributes.width.nodeValue + 'px';
177
el.getContext().clearRect();
180
el.style.height = el.attributes.height.nodeValue + 'px';
181
el.getContext().clearRect();
186
function onResize(e) {
187
var el = e.srcElement;
189
el.firstChild.style.width = el.clientWidth + 'px';
190
el.firstChild.style.height = el.clientHeight + 'px';
194
G_vmlCanvasManager_.init();
196
// precompute "00" to "FF"
198
for (var i = 0; i < 16; i++) {
199
for (var j = 0; j < 16; j++) {
200
dec2hex[i * 16 + j] = i.toString(16) + j.toString(16);
204
function createMatrixIdentity() {
212
function matrixMultiply(m1, m2) {
213
var result = createMatrixIdentity();
215
for (var x = 0; x < 3; x++) {
216
for (var y = 0; y < 3; y++) {
219
for (var z = 0; z < 3; z++) {
220
sum += m1[x][z] * m2[z][y];
229
function copyState(o1, o2) {
230
o2.fillStyle = o1.fillStyle;
231
o2.lineCap = o1.lineCap;
232
o2.lineJoin = o1.lineJoin;
233
o2.lineWidth = o1.lineWidth;
234
o2.miterLimit = o1.miterLimit;
235
o2.shadowBlur = o1.shadowBlur;
236
o2.shadowColor = o1.shadowColor;
237
o2.shadowOffsetX = o1.shadowOffsetX;
238
o2.shadowOffsetY = o1.shadowOffsetY;
239
o2.strokeStyle = o1.strokeStyle;
240
o2.globalAlpha = o1.globalAlpha;
241
o2.arcScaleX_ = o1.arcScaleX_;
242
o2.arcScaleY_ = o1.arcScaleY_;
243
o2.lineScale_ = o1.lineScale_;
246
function processStyle(styleString) {
249
styleString = String(styleString);
250
if (styleString.substring(0, 3) == 'rgb') {
251
var start = styleString.indexOf('(', 3);
252
var end = styleString.indexOf(')', start + 1);
253
var guts = styleString.substring(start + 1, end).split(',');
256
for (var i = 0; i < 3; i++) {
257
str += dec2hex[Number(guts[i])];
260
if (guts.length == 4 && styleString.substr(3, 1) == 'a') {
267
return {color: str, alpha: alpha};
270
function processLineCap(lineCap) {
283
* This class implements CanvasRenderingContext2D interface as described by
285
* @param {HTMLElement} surfaceElement The element that the 2D context should
288
function CanvasRenderingContext2D_(surfaceElement) {
289
this.m_ = createMatrixIdentity();
293
this.currentPath_ = [];
295
// Canvas context properties
296
this.strokeStyle = '#000';
297
this.fillStyle = '#000';
300
this.lineJoin = 'miter';
301
this.lineCap = 'butt';
302
this.miterLimit = Z * 1;
303
this.globalAlpha = 1;
304
this.canvas = surfaceElement;
306
var el = surfaceElement.ownerDocument.createElement('div');
307
el.style.width = surfaceElement.clientWidth + 'px';
308
el.style.height = surfaceElement.clientHeight + 'px';
309
el.style.overflow = 'hidden';
310
el.style.position = 'absolute';
311
surfaceElement.appendChild(el);
319
var contextPrototype = CanvasRenderingContext2D_.prototype;
320
contextPrototype.clearRect = function() {
321
this.element_.innerHTML = '';
324
contextPrototype.beginPath = function() {
325
// TODO: Branch current matrix so that save/restore has no effect
326
// as per safari docs.
327
this.currentPath_ = [];
330
contextPrototype.moveTo = function(aX, aY) {
331
var p = this.getCoords_(aX, aY);
332
this.currentPath_.push({type: 'moveTo', x: p.x, y: p.y});
333
this.currentX_ = p.x;
334
this.currentY_ = p.y;
337
contextPrototype.lineTo = function(aX, aY) {
338
var p = this.getCoords_(aX, aY);
339
this.currentPath_.push({type: 'lineTo', x: p.x, y: p.y});
341
this.currentX_ = p.x;
342
this.currentY_ = p.y;
345
contextPrototype.bezierCurveTo = function(aCP1x, aCP1y,
348
var p = this.getCoords_(aX, aY);
349
var cp1 = this.getCoords_(aCP1x, aCP1y);
350
var cp2 = this.getCoords_(aCP2x, aCP2y);
351
bezierCurveTo(this, cp1, cp2, p);
354
// Helper function that takes the already fixed cordinates.
355
function bezierCurveTo(self, cp1, cp2, p) {
356
self.currentPath_.push({
357
type: 'bezierCurveTo',
365
self.currentX_ = p.x;
366
self.currentY_ = p.y;
369
contextPrototype.quadraticCurveTo = function(aCPx, aCPy, aX, aY) {
370
// the following is lifted almost directly from
371
// http://developer.mozilla.org/en/docs/Canvas_tutorial:Drawing_shapes
373
var cp = this.getCoords_(aCPx, aCPy);
374
var p = this.getCoords_(aX, aY);
377
x: this.currentX_ + 2.0 / 3.0 * (cp.x - this.currentX_),
378
y: this.currentY_ + 2.0 / 3.0 * (cp.y - this.currentY_)
381
x: cp1.x + (p.x - this.currentX_) / 3.0,
382
y: cp1.y + (p.y - this.currentY_) / 3.0
385
bezierCurveTo(this, cp1, cp2, p);
388
contextPrototype.arc = function(aX, aY, aRadius,
389
aStartAngle, aEndAngle, aClockwise) {
391
var arcType = aClockwise ? 'at' : 'wa';
393
var xStart = aX + mc(aStartAngle) * aRadius - Z2;
394
var yStart = aY + ms(aStartAngle) * aRadius - Z2;
396
var xEnd = aX + mc(aEndAngle) * aRadius - Z2;
397
var yEnd = aY + ms(aEndAngle) * aRadius - Z2;
399
// IE won't render arches drawn counter clockwise if xStart == xEnd.
400
if (xStart == xEnd && !aClockwise) {
401
xStart += 0.125; // Offset xStart by 1/80 of a pixel. Use something
402
// that can be represented in binary
405
var p = this.getCoords_(aX, aY);
406
var pStart = this.getCoords_(xStart, yStart);
407
var pEnd = this.getCoords_(xEnd, yEnd);
409
this.currentPath_.push({type: arcType,
420
contextPrototype.rect = function(aX, aY, aWidth, aHeight) {
422
this.lineTo(aX + aWidth, aY);
423
this.lineTo(aX + aWidth, aY + aHeight);
424
this.lineTo(aX, aY + aHeight);
428
contextPrototype.strokeRect = function(aX, aY, aWidth, aHeight) {
429
var oldPath = this.currentPath_;
433
this.lineTo(aX + aWidth, aY);
434
this.lineTo(aX + aWidth, aY + aHeight);
435
this.lineTo(aX, aY + aHeight);
439
this.currentPath_ = oldPath;
442
contextPrototype.fillRect = function(aX, aY, aWidth, aHeight) {
443
var oldPath = this.currentPath_;
447
this.lineTo(aX + aWidth, aY);
448
this.lineTo(aX + aWidth, aY + aHeight);
449
this.lineTo(aX, aY + aHeight);
453
this.currentPath_ = oldPath;
456
contextPrototype.createLinearGradient = function(aX0, aY0, aX1, aY1) {
457
var gradient = new CanvasGradient_('gradient');
465
contextPrototype.createRadialGradient = function(aX0, aY0, aR0,
467
var gradient = new CanvasGradient_('gradientradial');
477
contextPrototype.drawImage = function(image, var_args) {
478
var dx, dy, dw, dh, sx, sy, sw, sh;
480
// to find the original width we overide the width and height
481
var oldRuntimeWidth = image.runtimeStyle.width;
482
var oldRuntimeHeight = image.runtimeStyle.height;
483
image.runtimeStyle.width = 'auto';
484
image.runtimeStyle.height = 'auto';
486
// get the original size
488
var h = image.height;
490
// and remove overides
491
image.runtimeStyle.width = oldRuntimeWidth;
492
image.runtimeStyle.height = oldRuntimeHeight;
494
if (arguments.length == 3) {
500
} else if (arguments.length == 5) {
508
} else if (arguments.length == 9) {
518
throw Error('Invalid number of arguments');
521
var d = this.getCoords_(dx, dy);
531
// For some reason that I've now forgotten, using divs didn't work
532
vmlStr.push(' <g_vml_:group',
533
' coordsize="', Z * W, ',', Z * H, '"',
534
' coordorigin="0,0"' ,
535
' style="width:', W, 'px;height:', H, 'px;position:absolute;');
537
// If filters are necessary (rotation exists), create them
538
// filters are bog-slow, so only create them if abbsolutely necessary
539
// The following check doesn't account for skews (which don't exist
540
// in the canvas spec (yet) anyway.
542
if (this.m_[0][0] != 1 || this.m_[0][1]) {
545
// Note the 12/21 reversal
546
filter.push('M11=', this.m_[0][0], ',',
547
'M12=', this.m_[1][0], ',',
548
'M21=', this.m_[0][1], ',',
549
'M22=', this.m_[1][1], ',',
550
'Dx=', mr(d.x / Z), ',',
551
'Dy=', mr(d.y / Z), '');
553
// Bounding box calculation (need to minimize displayed area so that
554
// filters don't waste time on unused pixels.
556
var c2 = this.getCoords_(dx + dw, dy);
557
var c3 = this.getCoords_(dx, dy + dh);
558
var c4 = this.getCoords_(dx + dw, dy + dh);
560
max.x = m.max(max.x, c2.x, c3.x, c4.x);
561
max.y = m.max(max.y, c2.y, c3.y, c4.y);
563
vmlStr.push('padding:0 ', mr(max.x / Z), 'px ', mr(max.y / Z),
564
'px 0;filter:progid:DXImageTransform.Microsoft.Matrix(',
565
filter.join(''), ", sizingmethod='clip');")
567
vmlStr.push('top:', mr(d.y / Z), 'px;left:', mr(d.x / Z), 'px;');
571
'<g_vml_:image src="', image.src, '"',
572
' style="width:', Z * dw, 'px;',
573
' height:', Z * dh, 'px;"',
574
' cropleft="', sx / w, '"',
575
' croptop="', sy / h, '"',
576
' cropright="', (w - sx - sw) / w, '"',
577
' cropbottom="', (h - sy - sh) / h, '"',
581
this.element_.insertAdjacentHTML('BeforeEnd',
585
contextPrototype.stroke = function(aFill) {
587
var lineOpen = false;
588
var a = processStyle(aFill ? this.fillStyle : this.strokeStyle);
590
var opacity = a.alpha * this.globalAlpha;
595
lineStr.push('<g_vml_:shape',
596
' filled="', !!aFill, '"',
597
' style="position:absolute;width:', W, 'px;height:', H, 'px;"',
598
' coordorigin="0 0" coordsize="', Z * W, ' ', Z * H, '"',
599
' stroked="', !aFill, '"',
603
var min = {x: null, y: null};
604
var max = {x: null, y: null};
606
for (var i = 0; i < this.currentPath_.length; i++) {
607
var p = this.currentPath_[i];
613
lineStr.push(' m ', mr(p.x), ',', mr(p.y));
616
lineStr.push(' l ', mr(p.x), ',', mr(p.y));
622
case 'bezierCurveTo':
624
mr(p.cp1x), ',', mr(p.cp1y), ',',
625
mr(p.cp2x), ',', mr(p.cp2y), ',',
626
mr(p.x), ',', mr(p.y));
630
lineStr.push(' ', p.type, ' ',
631
mr(p.x - this.arcScaleX_ * p.radius), ',',
632
mr(p.y - this.arcScaleY_ * p.radius), ' ',
633
mr(p.x + this.arcScaleX_ * p.radius), ',',
634
mr(p.y + this.arcScaleY_ * p.radius), ' ',
635
mr(p.xStart), ',', mr(p.yStart), ' ',
636
mr(p.xEnd), ',', mr(p.yEnd));
641
// TODO: Following is broken for curves due to
642
// move to proper paths.
644
// Figure out dimensions so we can do gradient fills
647
if (min.x == null || p.x < min.x) {
650
if (max.x == null || p.x > max.x) {
653
if (min.y == null || p.y < min.y) {
656
if (max.y == null || p.y > max.y) {
664
var lineWidth = this.lineScale_ * this.lineWidth;
666
// VML cannot correctly render a line if the width is less than 1px.
667
// In that case, we dilute the color to make the line look thinner.
669
opacity *= lineWidth;
674
' opacity="', opacity, '"',
675
' joinstyle="', this.lineJoin, '"',
676
' miterlimit="', this.miterLimit, '"',
677
' endcap="', processLineCap(this.lineCap), '"',
678
' weight="', lineWidth, 'px"',
679
' color="', color, '" />'
681
} else if (typeof this.fillStyle == 'object') {
682
var fillStyle = this.fillStyle;
684
var focus = {x: 0, y: 0};
688
// scale factor for offset
691
if (fillStyle.type_ == 'gradient') {
692
var x0 = fillStyle.x0_ / this.arcScaleX_;
693
var y0 = fillStyle.y0_ / this.arcScaleY_;
694
var x1 = fillStyle.x1_ / this.arcScaleX_;
695
var y1 = fillStyle.y1_ / this.arcScaleY_;
696
var p0 = this.getCoords_(x0, y0);
697
var p1 = this.getCoords_(x1, y1);
698
var dx = p1.x - p0.x;
699
var dy = p1.y - p0.y;
700
angle = Math.atan2(dx, dy) * 180 / Math.PI;
702
// The angle should be a non-negative number.
707
// Very small angles produce an unexpected result because they are
708
// converted to a scientific notation string.
713
var p0 = this.getCoords_(fillStyle.x0_, fillStyle.y0_);
714
var width = max.x - min.x;
715
var height = max.y - min.y;
717
x: (p0.x - min.x) / width,
718
y: (p0.y - min.y) / height
721
width /= this.arcScaleX_ * Z;
722
height /= this.arcScaleY_ * Z;
723
var dimension = m.max(width, height);
724
shift = 2 * fillStyle.r0_ / dimension;
725
expansion = 2 * fillStyle.r1_ / dimension - shift;
728
// We need to sort the color stops in ascending order by offset,
729
// otherwise IE won't interpret it correctly.
730
var stops = fillStyle.colors_;
731
stops.sort(function(cs1, cs2) {
732
return cs1.offset - cs2.offset;
735
var length = stops.length;
736
var color1 = stops[0].color;
737
var color2 = stops[length - 1].color;
738
var opacity1 = stops[0].alpha * this.globalAlpha;
739
var opacity2 = stops[length - 1].alpha * this.globalAlpha;
742
for (var i = 0; i < length; i++) {
744
colors.push(stop.offset * expansion + shift + ' ' + stop.color);
747
// When colors attribute is used, the meanings of opacity and o:opacity2
749
lineStr.push('<g_vml_:fill type="', fillStyle.type_, '"',
750
' method="none" focus="100%"',
751
' color="', color1, '"',
752
' color2="', color2, '"',
753
' colors="', colors.join(','), '"',
754
' opacity="', opacity2, '"',
755
' g_o_:opacity2="', opacity1, '"',
756
' angle="', angle, '"',
757
' focusposition="', focus.x, ',', focus.y, '" />');
759
lineStr.push('<g_vml_:fill color="', color, '" opacity="', opacity,
763
lineStr.push('</g_vml_:shape>');
765
this.element_.insertAdjacentHTML('beforeEnd', lineStr.join(''));
768
contextPrototype.fill = function() {
772
contextPrototype.closePath = function() {
773
this.currentPath_.push({type: 'close'});
779
contextPrototype.getCoords_ = function(aX, aY) {
782
x: Z * (aX * m[0][0] + aY * m[1][0] + m[2][0]) - Z2,
783
y: Z * (aX * m[0][1] + aY * m[1][1] + m[2][1]) - Z2
787
contextPrototype.save = function() {
790
this.aStack_.push(o);
791
this.mStack_.push(this.m_);
792
this.m_ = matrixMultiply(createMatrixIdentity(), this.m_);
795
contextPrototype.restore = function() {
796
copyState(this.aStack_.pop(), this);
797
this.m_ = this.mStack_.pop();
800
function matrixIsFinite(m) {
801
for (var j = 0; j < 3; j++) {
802
for (var k = 0; k < 2; k++) {
803
if (!isFinite(m[j][k]) || isNaN(m[j][k])) {
811
function setM(ctx, m, updateLineScale) {
812
if (!matrixIsFinite(m)) {
817
if (updateLineScale) {
818
// Get the line scale.
819
// Determinant of this.m_ means how much the area is enlarged by the
820
// transformation. So its square root can be used as a scale factor
822
var det = m[0][0] * m[1][1] - m[0][1] * m[1][0];
823
ctx.lineScale_ = sqrt(abs(det));
827
contextPrototype.translate = function(aX, aY) {
834
setM(this, matrixMultiply(m1, this.m_), false);
837
contextPrototype.rotate = function(aRot) {
847
setM(this, matrixMultiply(m1, this.m_), false);
850
contextPrototype.scale = function(aX, aY) {
851
this.arcScaleX_ *= aX;
852
this.arcScaleY_ *= aY;
859
setM(this, matrixMultiply(m1, this.m_), true);
862
contextPrototype.transform = function(m11, m12, m21, m22, dx, dy) {
869
setM(this, matrixMultiply(m1, this.m_), true);
872
contextPrototype.setTransform = function(m11, m12, m21, m22, dx, dy) {
882
/******** STUBS ********/
883
contextPrototype.clip = function() {
887
contextPrototype.arcTo = function() {
891
contextPrototype.createPattern = function() {
892
return new CanvasPattern_;
895
// Gradient / Pattern Stubs
896
function CanvasGradient_(aType) {
907
CanvasGradient_.prototype.addColorStop = function(aOffset, aColor) {
908
aColor = processStyle(aColor);
909
this.colors_.push({offset: aOffset,
911
alpha: aColor.alpha});
914
function CanvasPattern_() {}
917
G_vmlCanvasManager = G_vmlCanvasManager_;
918
CanvasRenderingContext2D = CanvasRenderingContext2D_;
919
CanvasGradient = CanvasGradient_;
920
CanvasPattern = CanvasPattern_;
926
if (dhtmlx && dhtmlx._modules)
927
dhtmlx._modules["thirdparty/excanvas/excanvas.js"] = true;
b'\\ No newline at end of file'
added
removed
pywrap/codebase/thirdparty/excanvas/excanvas.js
