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canvg.js
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canvg.js
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/*
* canvg.js - Javascript SVG parser and renderer on Canvas
* MIT Licensed
* Gabe Lerner ([email protected])
* http://code.google.com/p/canvg/
*
* Requires: rgbcolor.js - http://www.phpied.com/rgb-color-parser-in-javascript/
*/
(function ( global, factory ) {
'use strict';
// export as AMD...
if ( typeof define !== 'undefined' && define.amd ) {
define('canvgModule', [ 'rgbcolor', 'stackblur' ], factory );
}
// ...or as browserify
else if ( typeof module !== 'undefined' && module.exports ) {
module.exports = factory( require( 'rgbcolor' ), require( 'stackblur' ) );
}
global.canvg = factory( global.RGBColor, global.stackBlur );
}( typeof window !== 'undefined' ? window : this, function ( RGBColor, stackBlur ) {
// canvg(target, s)
// empty parameters: replace all 'svg' elements on page with 'canvas' elements
// target: canvas element or the id of a canvas element
// s: svg string, url to svg file, or xml document
// opts: optional hash of options
// ignoreMouse: true => ignore mouse events
// ignoreAnimation: true => ignore animations
// ignoreDimensions: true => does not try to resize canvas
// ignoreClear: true => does not clear canvas
// offsetX: int => draws at a x offset
// offsetY: int => draws at a y offset
// scaleWidth: int => scales horizontally to width
// scaleHeight: int => scales vertically to height
// renderCallback: function => will call the function after the first render is completed
// forceRedraw: function => will call the function on every frame, if it returns true, will redraw
var canvg = function (target, s, opts) {
// no parameters
if (target == null && s == null && opts == null) {
var svgTags = document.querySelectorAll('svg');
for (var i=0; i<svgTags.length; i++) {
var svgTag = svgTags[i];
var c = document.createElement('canvas');
c.width = svgTag.clientWidth;
c.height = svgTag.clientHeight;
svgTag.parentNode.insertBefore(c, svgTag);
svgTag.parentNode.removeChild(svgTag);
var div = document.createElement('div');
div.appendChild(svgTag);
canvg(c, div.innerHTML);
}
return;
}
if (typeof target == 'string') {
target = document.getElementById(target);
}
// store class on canvas
if (target.svg != null) target.svg.stop();
var svg = build(opts || {});
// on i.e. 8 for flash canvas, we can't assign the property so check for it
if (!(target.childNodes.length == 1 && target.childNodes[0].nodeName == 'OBJECT')) target.svg = svg;
var ctx = target.getContext('2d');
if (typeof s.documentElement != 'undefined') {
// load from xml doc
svg.loadXmlDoc(ctx, s);
}
else if (s.substr(0,1) == '<') {
// load from xml string
svg.loadXml(ctx, s);
}
else {
// load from url
svg.load(ctx, s);
}
}
// see https://developer.mozilla.org/en-US/docs/Web/API/Element.matches
var matchesSelector;
if (typeof Element.prototype.matches != 'undefined') {
matchesSelector = function(node, selector) {
return node.matches(selector);
};
} else if (typeof Element.prototype.webkitMatchesSelector != 'undefined') {
matchesSelector = function(node, selector) {
return node.webkitMatchesSelector(selector);
};
} else if (typeof Element.prototype.mozMatchesSelector != 'undefined') {
matchesSelector = function(node, selector) {
return node.mozMatchesSelector(selector);
};
} else if (typeof Element.prototype.msMatchesSelector != 'undefined') {
matchesSelector = function(node, selector) {
return node.msMatchesSelector(selector);
};
} else if (typeof Element.prototype.oMatchesSelector != 'undefined') {
matchesSelector = function(node, selector) {
return node.oMatchesSelector(selector);
};
} else {
// requires Sizzle: https://github.com/jquery/sizzle/wiki/Sizzle-Documentation
// or jQuery: http://jquery.com/download/
// or Zepto: http://zeptojs.com/#
// without it, this is a ReferenceError
if (typeof jQuery === 'function' || typeof Zepto === 'function') {
matchesSelector = function (node, selector) {
return $(node).is(selector);
};
}
if (typeof matchesSelector === 'undefined') {
matchesSelector = Sizzle.matchesSelector;
}
}
// slightly modified version of https://github.com/keeganstreet/specificity/blob/master/specificity.js
var attributeRegex = /(\[[^\]]+\])/g;
var idRegex = /(#[^\s\+>~\.\[:]+)/g;
var classRegex = /(\.[^\s\+>~\.\[:]+)/g;
var pseudoElementRegex = /(::[^\s\+>~\.\[:]+|:first-line|:first-letter|:before|:after)/gi;
var pseudoClassWithBracketsRegex = /(:[\w-]+\([^\)]*\))/gi;
var pseudoClassRegex = /(:[^\s\+>~\.\[:]+)/g;
var elementRegex = /([^\s\+>~\.\[:]+)/g;
function getSelectorSpecificity(selector) {
var typeCount = [0, 0, 0];
var findMatch = function(regex, type) {
var matches = selector.match(regex);
if (matches == null) {
return;
}
typeCount[type] += matches.length;
selector = selector.replace(regex, ' ');
};
selector = selector.replace(/:not\(([^\)]*)\)/g, ' $1 ');
selector = selector.replace(/{[\s\S]*/gm, ' ');
findMatch(attributeRegex, 1);
findMatch(idRegex, 0);
findMatch(classRegex, 1);
findMatch(pseudoElementRegex, 2);
findMatch(pseudoClassWithBracketsRegex, 1);
findMatch(pseudoClassRegex, 1);
selector = selector.replace(/[\*\s\+>~]/g, ' ');
selector = selector.replace(/[#\.]/g, ' ');
findMatch(elementRegex, 2);
return typeCount.join('');
}
function build(opts) {
var svg = { opts: opts };
svg.FRAMERATE = 30;
svg.MAX_VIRTUAL_PIXELS = 30000;
svg.log = function(msg) {};
if (svg.opts['log'] == true && typeof console != 'undefined') {
svg.log = function(msg) { console.log(msg); };
};
// globals
svg.init = function(ctx) {
var uniqueId = 0;
svg.UniqueId = function () { uniqueId++; return 'canvg' + uniqueId; };
svg.Definitions = {};
svg.Styles = {};
svg.StylesSpecificity = {};
svg.Animations = [];
svg.Images = [];
svg.ctx = ctx;
svg.ViewPort = new (function () {
this.viewPorts = [];
this.Clear = function() { this.viewPorts = []; }
this.SetCurrent = function(width, height) { this.viewPorts.push({ width: width, height: height }); }
this.RemoveCurrent = function() { this.viewPorts.pop(); }
this.Current = function() { return this.viewPorts[this.viewPorts.length - 1]; }
this.width = function() { return this.Current().width; }
this.height = function() { return this.Current().height; }
this.ComputeSize = function(d) {
if (d != null && typeof d == 'number') return d;
if (d == 'x') return this.width();
if (d == 'y') return this.height();
return Math.sqrt(Math.pow(this.width(), 2) + Math.pow(this.height(), 2)) / Math.sqrt(2);
}
});
}
svg.init();
// images loaded
svg.ImagesLoaded = function() {
for (var i=0; i<svg.Images.length; i++) {
if (!svg.Images[i].loaded) return false;
}
return true;
}
// trim
svg.trim = function(s) { return s.replace(/^\s+|\s+$/g, ''); }
// compress spaces
svg.compressSpaces = function(s) { return s.replace(/[\s\r\t\n]+/gm,' '); }
// ajax
svg.ajax = function(url) {
var AJAX;
if(window.XMLHttpRequest){AJAX=new XMLHttpRequest();}
else{AJAX=new ActiveXObject('Microsoft.XMLHTTP');}
if(AJAX){
AJAX.open('GET',url,false);
AJAX.send(null);
return AJAX.responseText;
}
return null;
}
// parse xml
svg.parseXml = function(xml) {
if (typeof Windows != 'undefined' && typeof Windows.Data != 'undefined' && typeof Windows.Data.Xml != 'undefined') {
var xmlDoc = new Windows.Data.Xml.Dom.XmlDocument();
var settings = new Windows.Data.Xml.Dom.XmlLoadSettings();
settings.prohibitDtd = false;
xmlDoc.loadXml(xml, settings);
return xmlDoc;
}
else if (window.DOMParser)
{
var parser = new DOMParser();
return parser.parseFromString(xml, 'text/xml');
}
else
{
xml = xml.replace(/<!DOCTYPE svg[^>]*>/, '');
var xmlDoc = new ActiveXObject('Microsoft.XMLDOM');
xmlDoc.async = 'false';
xmlDoc.loadXML(xml);
return xmlDoc;
}
}
svg.Property = function(name, value) {
this.name = name;
this.value = value;
}
svg.Property.prototype.getValue = function() {
return this.value;
}
svg.Property.prototype.hasValue = function() {
return (this.value != null && this.value !== '');
}
// return the numerical value of the property
svg.Property.prototype.numValue = function() {
if (!this.hasValue()) return 0;
var n = parseFloat(this.value);
if ((this.value + '').match(/%$/)) {
n = n / 100.0;
}
return n;
}
svg.Property.prototype.valueOrDefault = function(def) {
if (this.hasValue()) return this.value;
return def;
}
svg.Property.prototype.numValueOrDefault = function(def) {
if (this.hasValue()) return this.numValue();
return def;
}
// color extensions
// augment the current color value with the opacity
svg.Property.prototype.addOpacity = function(opacityProp) {
var newValue = this.value;
if (opacityProp.value != null && opacityProp.value != '' && typeof this.value == 'string') { // can only add opacity to colors, not patterns
var color = new RGBColor(this.value);
if (color.ok) {
newValue = 'rgba(' + color.r + ', ' + color.g + ', ' + color.b + ', ' + opacityProp.numValue() + ')';
}
}
return new svg.Property(this.name, newValue);
}
// definition extensions
// get the definition from the definitions table
svg.Property.prototype.getDefinition = function() {
var name = this.value.match(/#([^\)'"]+)/);
if (name) { name = name[1]; }
if (!name) { name = this.value; }
return svg.Definitions[name];
}
svg.Property.prototype.isUrlDefinition = function() {
return this.value.indexOf('url(') == 0
}
svg.Property.prototype.getFillStyleDefinition = function(e, opacityProp) {
var def = this.getDefinition();
// gradient
if (def != null && def.createGradient) {
return def.createGradient(svg.ctx, e, opacityProp);
}
// pattern
if (def != null && def.createPattern) {
if (def.getHrefAttribute().hasValue()) {
var pt = def.attribute('patternTransform');
def = def.getHrefAttribute().getDefinition();
if (pt.hasValue()) { def.attribute('patternTransform', true).value = pt.value; }
}
return def.createPattern(svg.ctx, e);
}
return null;
}
// length extensions
svg.Property.prototype.getDPI = function(viewPort) {
return 96.0; // TODO: compute?
}
svg.Property.prototype.getEM = function(viewPort) {
var em = 12;
var fontSize = new svg.Property('fontSize', svg.Font.Parse(svg.ctx.font).fontSize);
if (fontSize.hasValue()) em = fontSize.toPixels(viewPort);
return em;
}
svg.Property.prototype.getUnits = function() {
var s = this.value+'';
return s.replace(/[0-9\.\-]/g,'');
}
// get the length as pixels
svg.Property.prototype.toPixels = function(viewPort, processPercent) {
if (!this.hasValue()) return 0;
var s = this.value+'';
if (s.match(/em$/)) return this.numValue() * this.getEM(viewPort);
if (s.match(/ex$/)) return this.numValue() * this.getEM(viewPort) / 2.0;
if (s.match(/px$/)) return this.numValue();
if (s.match(/pt$/)) return this.numValue() * this.getDPI(viewPort) * (1.0 / 72.0);
if (s.match(/pc$/)) return this.numValue() * 15;
if (s.match(/cm$/)) return this.numValue() * this.getDPI(viewPort) / 2.54;
if (s.match(/mm$/)) return this.numValue() * this.getDPI(viewPort) / 25.4;
if (s.match(/in$/)) return this.numValue() * this.getDPI(viewPort);
if (s.match(/%$/)) return this.numValue() * svg.ViewPort.ComputeSize(viewPort);
var n = this.numValue();
if (processPercent && n < 1.0) return n * svg.ViewPort.ComputeSize(viewPort);
return n;
}
// time extensions
// get the time as milliseconds
svg.Property.prototype.toMilliseconds = function() {
if (!this.hasValue()) return 0;
var s = this.value+'';
if (s.match(/s$/)) return this.numValue() * 1000;
if (s.match(/ms$/)) return this.numValue();
return this.numValue();
}
// angle extensions
// get the angle as radians
svg.Property.prototype.toRadians = function() {
if (!this.hasValue()) return 0;
var s = this.value+'';
if (s.match(/deg$/)) return this.numValue() * (Math.PI / 180.0);
if (s.match(/grad$/)) return this.numValue() * (Math.PI / 200.0);
if (s.match(/rad$/)) return this.numValue();
return this.numValue() * (Math.PI / 180.0);
}
// text extensions
// get the text baseline
var textBaselineMapping = {
'baseline': 'alphabetic',
'before-edge': 'top',
'text-before-edge': 'top',
'middle': 'middle',
'central': 'middle',
'after-edge': 'bottom',
'text-after-edge': 'bottom',
'ideographic': 'ideographic',
'alphabetic': 'alphabetic',
'hanging': 'hanging',
'mathematical': 'alphabetic'
};
svg.Property.prototype.toTextBaseline = function () {
if (!this.hasValue()) return null;
return textBaselineMapping[this.value];
}
// fonts
svg.Font = new (function() {
this.Styles = 'normal|italic|oblique|inherit';
this.Variants = 'normal|small-caps|inherit';
this.Weights = 'normal|bold|bolder|lighter|100|200|300|400|500|600|700|800|900|inherit';
this.CreateFont = function(fontStyle, fontVariant, fontWeight, fontSize, fontFamily, inherit) {
var f = inherit != null ? this.Parse(inherit) : this.CreateFont('', '', '', '', '', svg.ctx.font);
return {
fontFamily: fontFamily || f.fontFamily,
fontSize: fontSize || f.fontSize,
fontStyle: fontStyle || f.fontStyle,
fontWeight: fontWeight || f.fontWeight,
fontVariant: fontVariant || f.fontVariant,
toString: function () { return [this.fontStyle, this.fontVariant, this.fontWeight, this.fontSize, this.fontFamily].join(' ') }
}
}
var that = this;
this.Parse = function(s) {
var f = {};
var d = svg.trim(svg.compressSpaces(s || '')).split(' ');
var set = { fontSize: false, fontStyle: false, fontWeight: false, fontVariant: false }
var ff = '';
for (var i=0; i<d.length; i++) {
if (!set.fontStyle && that.Styles.indexOf(d[i]) != -1) { if (d[i] != 'inherit') f.fontStyle = d[i]; set.fontStyle = true; }
else if (!set.fontVariant && that.Variants.indexOf(d[i]) != -1) { if (d[i] != 'inherit') f.fontVariant = d[i]; set.fontStyle = set.fontVariant = true; }
else if (!set.fontWeight && that.Weights.indexOf(d[i]) != -1) { if (d[i] != 'inherit') f.fontWeight = d[i]; set.fontStyle = set.fontVariant = set.fontWeight = true; }
else if (!set.fontSize) { if (d[i] != 'inherit') f.fontSize = d[i].split('/')[0]; set.fontStyle = set.fontVariant = set.fontWeight = set.fontSize = true; }
else { if (d[i] != 'inherit') ff += d[i]; }
} if (ff != '') f.fontFamily = ff;
return f;
}
});
// points and paths
svg.ToNumberArray = function(s) {
var a = svg.trim(svg.compressSpaces((s || '').replace(/,/g, ' '))).split(' ');
for (var i=0; i<a.length; i++) {
a[i] = parseFloat(a[i]);
}
return a;
}
svg.Point = function(x, y) {
this.x = x;
this.y = y;
}
svg.Point.prototype.angleTo = function(p) {
return Math.atan2(p.y - this.y, p.x - this.x);
}
svg.Point.prototype.applyTransform = function(v) {
var xp = this.x * v[0] + this.y * v[2] + v[4];
var yp = this.x * v[1] + this.y * v[3] + v[5];
this.x = xp;
this.y = yp;
}
svg.CreatePoint = function(s) {
var a = svg.ToNumberArray(s);
return new svg.Point(a[0], a[1]);
}
svg.CreatePath = function(s) {
var a = svg.ToNumberArray(s);
var path = [];
for (var i=0; i<a.length; i+=2) {
path.push(new svg.Point(a[i], a[i+1]));
}
return path;
}
// bounding box
svg.BoundingBox = function(x1, y1, x2, y2) { // pass in initial points if you want
this.x1 = Number.NaN;
this.y1 = Number.NaN;
this.x2 = Number.NaN;
this.y2 = Number.NaN;
this.x = function() { return this.x1; }
this.y = function() { return this.y1; }
this.width = function() { return this.x2 - this.x1; }
this.height = function() { return this.y2 - this.y1; }
this.addPoint = function(x, y) {
if (x != null) {
if (isNaN(this.x1) || isNaN(this.x2)) {
this.x1 = x;
this.x2 = x;
}
if (x < this.x1) this.x1 = x;
if (x > this.x2) this.x2 = x;
}
if (y != null) {
if (isNaN(this.y1) || isNaN(this.y2)) {
this.y1 = y;
this.y2 = y;
}
if (y < this.y1) this.y1 = y;
if (y > this.y2) this.y2 = y;
}
}
this.addX = function(x) { this.addPoint(x, null); }
this.addY = function(y) { this.addPoint(null, y); }
this.addBoundingBox = function(bb) {
this.addPoint(bb.x1, bb.y1);
this.addPoint(bb.x2, bb.y2);
}
this.addQuadraticCurve = function(p0x, p0y, p1x, p1y, p2x, p2y) {
var cp1x = p0x + 2/3 * (p1x - p0x); // CP1 = QP0 + 2/3 *(QP1-QP0)
var cp1y = p0y + 2/3 * (p1y - p0y); // CP1 = QP0 + 2/3 *(QP1-QP0)
var cp2x = cp1x + 1/3 * (p2x - p0x); // CP2 = CP1 + 1/3 *(QP2-QP0)
var cp2y = cp1y + 1/3 * (p2y - p0y); // CP2 = CP1 + 1/3 *(QP2-QP0)
this.addBezierCurve(p0x, p0y, cp1x, cp2x, cp1y, cp2y, p2x, p2y);
}
this.addBezierCurve = function(p0x, p0y, p1x, p1y, p2x, p2y, p3x, p3y) {
// from http://blog.hackers-cafe.net/2009/06/how-to-calculate-bezier-curves-bounding.html
var p0 = [p0x, p0y], p1 = [p1x, p1y], p2 = [p2x, p2y], p3 = [p3x, p3y];
this.addPoint(p0[0], p0[1]);
this.addPoint(p3[0], p3[1]);
for (i=0; i<=1; i++) {
var f = function(t) {
return Math.pow(1-t, 3) * p0[i]
+ 3 * Math.pow(1-t, 2) * t * p1[i]
+ 3 * (1-t) * Math.pow(t, 2) * p2[i]
+ Math.pow(t, 3) * p3[i];
}
var b = 6 * p0[i] - 12 * p1[i] + 6 * p2[i];
var a = -3 * p0[i] + 9 * p1[i] - 9 * p2[i] + 3 * p3[i];
var c = 3 * p1[i] - 3 * p0[i];
if (a == 0) {
if (b == 0) continue;
var t = -c / b;
if (0 < t && t < 1) {
if (i == 0) this.addX(f(t));
if (i == 1) this.addY(f(t));
}
continue;
}
var b2ac = Math.pow(b, 2) - 4 * c * a;
if (b2ac < 0) continue;
var t1 = (-b + Math.sqrt(b2ac)) / (2 * a);
if (0 < t1 && t1 < 1) {
if (i == 0) this.addX(f(t1));
if (i == 1) this.addY(f(t1));
}
var t2 = (-b - Math.sqrt(b2ac)) / (2 * a);
if (0 < t2 && t2 < 1) {
if (i == 0) this.addX(f(t2));
if (i == 1) this.addY(f(t2));
}
}
}
this.isPointInBox = function(x, y) {
return (this.x1 <= x && x <= this.x2 && this.y1 <= y && y <= this.y2);
}
this.addPoint(x1, y1);
this.addPoint(x2, y2);
}
// transforms
svg.Transform = function(v) {
var that = this;
this.Type = {}
// translate
this.Type.translate = function(s) {
this.p = svg.CreatePoint(s);
this.apply = function(ctx) {
ctx.translate(this.p.x || 0.0, this.p.y || 0.0);
}
this.unapply = function(ctx) {
ctx.translate(-1.0 * this.p.x || 0.0, -1.0 * this.p.y || 0.0);
}
this.applyToPoint = function(p) {
p.applyTransform([1, 0, 0, 1, this.p.x || 0.0, this.p.y || 0.0]);
}
}
// rotate
this.Type.rotate = function(s) {
var a = svg.ToNumberArray(s);
this.angle = new svg.Property('angle', a[0]);
this.cx = a[1] || 0;
this.cy = a[2] || 0;
this.apply = function(ctx) {
ctx.translate(this.cx, this.cy);
ctx.rotate(this.angle.toRadians());
ctx.translate(-this.cx, -this.cy);
}
this.unapply = function(ctx) {
ctx.translate(this.cx, this.cy);
ctx.rotate(-1.0 * this.angle.toRadians());
ctx.translate(-this.cx, -this.cy);
}
this.applyToPoint = function(p) {
var a = this.angle.toRadians();
p.applyTransform([1, 0, 0, 1, this.p.x || 0.0, this.p.y || 0.0]);
p.applyTransform([Math.cos(a), Math.sin(a), -Math.sin(a), Math.cos(a), 0, 0]);
p.applyTransform([1, 0, 0, 1, -this.p.x || 0.0, -this.p.y || 0.0]);
}
}
this.Type.scale = function(s) {
this.p = svg.CreatePoint(s);
this.apply = function(ctx) {
ctx.scale(this.p.x || 1.0, this.p.y || this.p.x || 1.0);
}
this.unapply = function(ctx) {
ctx.scale(1.0 / this.p.x || 1.0, 1.0 / this.p.y || this.p.x || 1.0);
}
this.applyToPoint = function(p) {
p.applyTransform([this.p.x || 0.0, 0, 0, this.p.y || 0.0, 0, 0]);
}
}
this.Type.matrix = function(s) {
this.m = svg.ToNumberArray(s);
this.apply = function(ctx) {
ctx.transform(this.m[0], this.m[1], this.m[2], this.m[3], this.m[4], this.m[5]);
}
this.unapply = function(ctx) {
var a = this.m[0];
var b = this.m[2];
var c = this.m[4];
var d = this.m[1];
var e = this.m[3];
var f = this.m[5];
var g = 0.0;
var h = 0.0;
var i = 1.0;
var det = 1 / (a*(e*i-f*h)-b*(d*i-f*g)+c*(d*h-e*g));
ctx.transform(
det*(e*i-f*h),
det*(f*g-d*i),
det*(c*h-b*i),
det*(a*i-c*g),
det*(b*f-c*e),
det*(c*d-a*f)
);
}
this.applyToPoint = function(p) {
p.applyTransform(this.m);
}
}
this.Type.SkewBase = function(s) {
this.base = that.Type.matrix;
this.base(s);
this.angle = new svg.Property('angle', s);
}
this.Type.SkewBase.prototype = new this.Type.matrix;
this.Type.skewX = function(s) {
this.base = that.Type.SkewBase;
this.base(s);
this.m = [1, 0, Math.tan(this.angle.toRadians()), 1, 0, 0];
}
this.Type.skewX.prototype = new this.Type.SkewBase;
this.Type.skewY = function(s) {
this.base = that.Type.SkewBase;
this.base(s);
this.m = [1, Math.tan(this.angle.toRadians()), 0, 1, 0, 0];
}
this.Type.skewY.prototype = new this.Type.SkewBase;
this.transforms = [];
this.apply = function(ctx) {
for (var i=0; i<this.transforms.length; i++) {
this.transforms[i].apply(ctx);
}
}
this.unapply = function(ctx) {
for (var i=this.transforms.length-1; i>=0; i--) {
this.transforms[i].unapply(ctx);
}
}
this.applyToPoint = function(p) {
for (var i=0; i<this.transforms.length; i++) {
this.transforms[i].applyToPoint(p);
}
}
var data = svg.trim(svg.compressSpaces(v)).replace(/\)([a-zA-Z])/g, ') $1').replace(/\)(\s?,\s?)/g,') ').split(/\s(?=[a-z])/);
for (var i=0; i<data.length; i++) {
var type = svg.trim(data[i].split('(')[0]);
var s = data[i].split('(')[1].replace(')','');
var transformType = this.Type[type];
if (typeof transformType != 'undefined') {
var transform = new transformType(s);
transform.type = type;
this.transforms.push(transform);
}
}
}
// aspect ratio
svg.AspectRatio = function(ctx, aspectRatio, width, desiredWidth, height, desiredHeight, minX, minY, refX, refY) {
// aspect ratio - http://www.w3.org/TR/SVG/coords.html#PreserveAspectRatioAttribute
aspectRatio = svg.compressSpaces(aspectRatio);
aspectRatio = aspectRatio.replace(/^defer\s/,''); // ignore defer
var align = aspectRatio.split(' ')[0] || 'xMidYMid';
var meetOrSlice = aspectRatio.split(' ')[1] || 'meet';
// calculate scale
var scaleX = width / desiredWidth;
var scaleY = height / desiredHeight;
var scaleMin = Math.min(scaleX, scaleY);
var scaleMax = Math.max(scaleX, scaleY);
if (meetOrSlice == 'meet') { desiredWidth *= scaleMin; desiredHeight *= scaleMin; }
if (meetOrSlice == 'slice') { desiredWidth *= scaleMax; desiredHeight *= scaleMax; }
refX = new svg.Property('refX', refX);
refY = new svg.Property('refY', refY);
if (refX.hasValue() && refY.hasValue()) {
ctx.translate(-scaleMin * refX.toPixels('x'), -scaleMin * refY.toPixels('y'));
}
else {
// align
if (align.match(/^xMid/) && ((meetOrSlice == 'meet' && scaleMin == scaleY) || (meetOrSlice == 'slice' && scaleMax == scaleY))) ctx.translate(width / 2.0 - desiredWidth / 2.0, 0);
if (align.match(/YMid$/) && ((meetOrSlice == 'meet' && scaleMin == scaleX) || (meetOrSlice == 'slice' && scaleMax == scaleX))) ctx.translate(0, height / 2.0 - desiredHeight / 2.0);
if (align.match(/^xMax/) && ((meetOrSlice == 'meet' && scaleMin == scaleY) || (meetOrSlice == 'slice' && scaleMax == scaleY))) ctx.translate(width - desiredWidth, 0);
if (align.match(/YMax$/) && ((meetOrSlice == 'meet' && scaleMin == scaleX) || (meetOrSlice == 'slice' && scaleMax == scaleX))) ctx.translate(0, height - desiredHeight);
}
// scale
if (align == 'none') ctx.scale(scaleX, scaleY);
else if (meetOrSlice == 'meet') ctx.scale(scaleMin, scaleMin);
else if (meetOrSlice == 'slice') ctx.scale(scaleMax, scaleMax);
// translate
ctx.translate(minX == null ? 0 : -minX, minY == null ? 0 : -minY);
}
// elements
svg.Element = {}
svg.EmptyProperty = new svg.Property('EMPTY', '');
svg.Element.ElementBase = function(node) {
this.attributes = {};
this.styles = {};
this.stylesSpecificity = {};
this.children = [];
// get or create attribute
this.attribute = function(name, createIfNotExists) {
var a = this.attributes[name];
if (a != null) return a;
if (createIfNotExists == true) { a = new svg.Property(name, ''); this.attributes[name] = a; }
return a || svg.EmptyProperty;
}
this.getHrefAttribute = function() {
for (var a in this.attributes) {
if (a == 'href' || a.match(/:href$/)) {
return this.attributes[a];
}
}
return svg.EmptyProperty;
}
// get or create style, crawls up node tree
this.style = function(name, createIfNotExists, skipAncestors) {
var s = this.styles[name];
if (s != null) return s;
var a = this.attribute(name);
if (a != null && a.hasValue()) {
this.styles[name] = a; // move up to me to cache
return a;
}
if (skipAncestors != true) {
var p = this.parent;
if (p != null) {
var ps = p.style(name);
if (ps != null && ps.hasValue()) {
return ps;
}
}
}
if (createIfNotExists == true) { s = new svg.Property(name, ''); this.styles[name] = s; }
return s || svg.EmptyProperty;
}
// base render
this.render = function(ctx) {
// don't render display=none
if (this.style('display').value == 'none') return;
// don't render visibility=hidden
if (this.style('visibility').value == 'hidden') return;
ctx.save();
if (this.style('mask').hasValue()) { // mask
var mask = this.style('mask').getDefinition();
if (mask != null) mask.apply(ctx, this);
}
else if (this.style('filter').hasValue()) { // filter
var filter = this.style('filter').getDefinition();
if (filter != null) filter.apply(ctx, this);
}
else {
this.setContext(ctx);
this.renderChildren(ctx);
this.clearContext(ctx);
}
ctx.restore();
}
// base set context
this.setContext = function(ctx) {
// OVERRIDE ME!
}
// base clear context
this.clearContext = function(ctx) {
// OVERRIDE ME!
}
// base render children
this.renderChildren = function(ctx) {
for (var i=0; i<this.children.length; i++) {
this.children[i].render(ctx);
}
}
this.addChild = function(childNode, create) {
var child = childNode;
if (create) child = svg.CreateElement(childNode);
child.parent = this;
if (child.type != 'title') { this.children.push(child); }
}
this.addStylesFromStyleDefinition = function () {
// add styles
for (var selector in svg.Styles) {
if (selector[0] != '@' && matchesSelector(node, selector)) {
var styles = svg.Styles[selector];
var specificity = svg.StylesSpecificity[selector];
if (styles != null) {
for (var name in styles) {
var existingSpecificity = this.stylesSpecificity[name];
if (typeof existingSpecificity == 'undefined') {
existingSpecificity = '000';
}
if (specificity > existingSpecificity) {
this.styles[name] = styles[name];
this.stylesSpecificity[name] = specificity;
}
}
}
}
}
};
// Microsoft Edge fix
var allUppercase = new RegExp("^[A-Z\-]+$");
var normalizeAttributeName = function (name) {
if (allUppercase.test(name)) {
return name.toLowerCase();
}
return name;
};
if (node != null && node.nodeType == 1) { //ELEMENT_NODE
// add attributes
for (var i=0; i<node.attributes.length; i++) {
var attribute = node.attributes[i];
var nodeName = normalizeAttributeName(attribute.nodeName);
this.attributes[nodeName] = new svg.Property(nodeName, attribute.value);
}
this.addStylesFromStyleDefinition();
// add inline styles
if (this.attribute('style').hasValue()) {
var styles = this.attribute('style').value.split(';');
for (var i=0; i<styles.length; i++) {
if (svg.trim(styles[i]) != '') {
var style = styles[i].split(':');
var name = svg.trim(style[0]);
var value = svg.trim(style[1]);
this.styles[name] = new svg.Property(name, value);
}
}
}
// add id
if (this.attribute('id').hasValue()) {
if (svg.Definitions[this.attribute('id').value] == null) {
svg.Definitions[this.attribute('id').value] = this;
}
}
// add children
for (var i=0; i<node.childNodes.length; i++) {
var childNode = node.childNodes[i];
if (childNode.nodeType == 1) this.addChild(childNode, true); //ELEMENT_NODE
if (this.captureTextNodes && (childNode.nodeType == 3 || childNode.nodeType == 4)) {
var text = childNode.value || childNode.text || childNode.textContent || '';
if (svg.compressSpaces(text) != '') {
this.addChild(new svg.Element.tspan(childNode), false); // TEXT_NODE
}
}
}
}
}
svg.Element.RenderedElementBase = function(node) {
this.base = svg.Element.ElementBase;
this.base(node);
this.setContext = function(ctx) {
// fill
if (this.style('fill').isUrlDefinition()) {
var fs = this.style('fill').getFillStyleDefinition(this, this.style('fill-opacity'));
if (fs != null) ctx.fillStyle = fs;
}
else if (this.style('fill').hasValue()) {
var fillStyle = this.style('fill');
if (fillStyle.value == 'currentColor') fillStyle.value = this.style('color').value;
if (fillStyle.value != 'inherit') ctx.fillStyle = (fillStyle.value == 'none' ? 'rgba(0,0,0,0)' : fillStyle.value);
}
if (this.style('fill-opacity').hasValue()) {
var fillStyle = new svg.Property('fill', ctx.fillStyle);
fillStyle = fillStyle.addOpacity(this.style('fill-opacity'));
ctx.fillStyle = fillStyle.value;
}
// stroke
if (this.style('stroke').isUrlDefinition()) {
var fs = this.style('stroke').getFillStyleDefinition(this, this.style('stroke-opacity'));
if (fs != null) ctx.strokeStyle = fs;
}
else if (this.style('stroke').hasValue()) {
var strokeStyle = this.style('stroke');
if (strokeStyle.value == 'currentColor') strokeStyle.value = this.style('color').value;
if (strokeStyle.value != 'inherit') ctx.strokeStyle = (strokeStyle.value == 'none' ? 'rgba(0,0,0,0)' : strokeStyle.value);
}
if (this.style('stroke-opacity').hasValue()) {
var strokeStyle = new svg.Property('stroke', ctx.strokeStyle);
strokeStyle = strokeStyle.addOpacity(this.style('stroke-opacity'));
ctx.strokeStyle = strokeStyle.value;
}
if (this.style('stroke-width').hasValue()) {
var newLineWidth = this.style('stroke-width').toPixels();
ctx.lineWidth = newLineWidth == 0 ? 0.001 : newLineWidth; // browsers don't respect 0
}
if (this.style('stroke-linecap').hasValue()) ctx.lineCap = this.style('stroke-linecap').value;
if (this.style('stroke-linejoin').hasValue()) ctx.lineJoin = this.style('stroke-linejoin').value;
if (this.style('stroke-miterlimit').hasValue()) ctx.miterLimit = this.style('stroke-miterlimit').value;
if (this.style('stroke-dasharray').hasValue() && this.style('stroke-dasharray').value != 'none') {
var gaps = svg.ToNumberArray(this.style('stroke-dasharray').value);
if (typeof ctx.setLineDash != 'undefined') { ctx.setLineDash(gaps); }
else if (typeof ctx.webkitLineDash != 'undefined') { ctx.webkitLineDash = gaps; }
else if (typeof ctx.mozDash != 'undefined' && !(gaps.length==1 && gaps[0]==0)) { ctx.mozDash = gaps; }
var offset = this.style('stroke-dashoffset').numValueOrDefault(1);
if (typeof ctx.lineDashOffset != 'undefined') { ctx.lineDashOffset = offset; }
else if (typeof ctx.webkitLineDashOffset != 'undefined') { ctx.webkitLineDashOffset = offset; }
else if (typeof ctx.mozDashOffset != 'undefined') { ctx.mozDashOffset = offset; }
}
// font
if (typeof ctx.font != 'undefined') {
ctx.font = svg.Font.CreateFont(
this.style('font-style').value,
this.style('font-variant').value,
this.style('font-weight').value,
this.style('font-size').hasValue() ? this.style('font-size').toPixels() + 'px' : '',
this.style('font-family').value).toString();
}
// transform
if (this.style('transform', false, true).hasValue()) {
var transform = new svg.Transform(this.style('transform', false, true).value);
transform.apply(ctx);
}