1610 lines
53 KiB
JavaScript
1610 lines
53 KiB
JavaScript
/*
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* canvg.js - Javascript SVG parser and renderer on Canvas
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* MIT Licensed
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* Gabe Lerner (gabelerner@gmail.com)
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* http://code.google.com/p/canvg/
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*
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* Requires: rgbcolor.js - http://www.phpied.com/rgb-color-parser-in-javascript/
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*/
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if(!window.console) {
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window.console = {};
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window.console.log = function(str) {};
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window.console.dir = function(str) {};
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}
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(function(){
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// canvg(target, s)
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// target: canvas element or the id of a canvas element
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// s: svg string or url to svg file
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this.canvg = function (target, s) {
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if (typeof target == 'string') {
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target = document.getElementById(target);
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}
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// reuse class per canvas
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var svg;
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if (target.svg == null) {
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svg = build();
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target.svg = svg;
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}
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else {
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svg = target.svg;
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svg.stop();
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}
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var ctx = target.getContext('2d');
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if (s.substr(0,1) == '<') {
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// load from xml string
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svg.loadXml(ctx, s);
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}
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else {
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// load from url
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svg.load(ctx, s);
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}
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}
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function build() {
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var svg = {};
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svg.FRAMERATE = 30;
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// globals
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svg.init = function(ctx) {
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svg.Definitions = {};
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svg.Styles = {};
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svg.Animations = [];
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svg.ctx = ctx;
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svg.ViewPort = new (function () {
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this.viewPorts = [];
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this.SetCurrent = function(width, height) { this.viewPorts.push({ width: width, height: height }); }
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this.RemoveCurrent = function() { this.viewPorts.pop(); }
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this.Current = function() { return this.viewPorts[this.viewPorts.length - 1]; }
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this.width = function() { return this.Current().width; }
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this.height = function() { return this.Current().height; }
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this.ComputeSize = function(d) {
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if (d != null && typeof(d) == 'number') return d;
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if (d == 'x') return this.width();
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if (d == 'y') return this.height();
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return Math.sqrt(Math.pow(this.width(), 2) + Math.pow(this.height(), 2)) / Math.sqrt(2);
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}
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});
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}
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svg.init();
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// trim
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svg.trim = function(s) { return s.replace(/^\s+|\s+$/g, ''); }
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// compress spaces
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svg.compressSpaces = function(s) { return s.replace(/[\s\r\t\n]+/gm,' '); }
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// ajax
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svg.ajax = function(url) {
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var AJAX;
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if(window.XMLHttpRequest){AJAX=new XMLHttpRequest();}
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else{AJAX=new ActiveXObject('Microsoft.XMLHTTP');}
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if(AJAX){
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AJAX.open('GET',url,false);
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AJAX.send(null);
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return AJAX.responseText;
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}
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return null;
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}
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// parse xml
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svg.parseXml = function(xml) {
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if (window.DOMParser)
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{
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var parser = new DOMParser();
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return parser.parseFromString(xml, 'text/xml');
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}
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else
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{
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xml = xml.replace(/<!DOCTYPE svg[^>]*>/, '');
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var xmlDoc = new ActiveXObject('Microsoft.XMLDOM');
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xmlDoc.async = 'false';
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xmlDoc.loadXML(xml);
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return xmlDoc;
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}
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}
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svg.Property = function(name, value) {
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this.name = name;
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this.value = value;
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this.hasValue = function() {
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return (this.value != null && this.value != '');
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}
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// return the numerical value of the property
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this.numValue = function() {
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if (!this.hasValue()) return 0;
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var n = parseFloat(this.value);
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if ((this.value + '').match(/%$/)) {
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n = n / 100.0;
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}
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return n;
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}
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this.valueOrDefault = function(def) {
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if (this.hasValue()) return this.value;
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return def;
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}
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this.numValueOrDefault = function(def) {
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if (this.hasValue()) return this.numValue();
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return def;
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}
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/* EXTENSIONS */
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var that = this;
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// color extensions
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this.Color = {
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// augment the current color value with the opacity
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addOpacity: function(opacity) {
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var newValue = that.value;
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if (opacity != null && opacity != '') {
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var color = new RGBColor(that.value);
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if (color.ok) {
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newValue = 'rgba(' + color.r + ', ' + color.g + ', ' + color.b + ', ' + opacity + ')';
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}
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}
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return new svg.Property(that.name, newValue);
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}
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}
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// definition extensions
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this.Definition = {
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// get the definition from the definitions table
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getDefinition: function() {
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var name = that.value.replace(/^(url\()?#([^\)]+)\)?$/, '$2');
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return svg.Definitions[name];
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},
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isUrl: function() {
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return that.value.indexOf('url(') == 0
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},
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getGradient: function(e) {
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var grad = this.getDefinition();
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if (grad != null && grad.createGradient) {
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return grad.createGradient(svg.ctx, e);
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}
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return null;
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}
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}
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// length extensions
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this.Length = {
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DPI: function(viewPort) {
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return 96.0; // TODO: compute?
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},
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EM: function(viewPort) {
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var em = 12;
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var fontSize = new svg.Property('fontSize', svg.Font.Parse(svg.ctx.font).fontSize);
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if (fontSize.hasValue()) em = fontSize.Length.toPixels(viewPort);
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return em;
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},
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// get the length as pixels
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toPixels: function(viewPort) {
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if (!that.hasValue()) return 0;
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var s = that.value+'';
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if (s.match(/em$/)) return that.numValue() * this.EM(viewPort);
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if (s.match(/ex$/)) return that.numValue() * this.EM(viewPort) / 2.0;
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if (s.match(/px$/)) return that.numValue();
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if (s.match(/pt$/)) return that.numValue() * 1.25;
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if (s.match(/pc$/)) return that.numValue() * 15;
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if (s.match(/cm$/)) return that.numValue() * this.DPI(viewPort) / 2.54;
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if (s.match(/mm$/)) return that.numValue() * this.DPI(viewPort) / 25.4;
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if (s.match(/in$/)) return that.numValue() * this.DPI(viewPort);
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if (s.match(/%$/)) return that.numValue() * svg.ViewPort.ComputeSize(viewPort);
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return that.numValue();
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}
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}
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// time extensions
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this.Time = {
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// get the time as milliseconds
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toMilliseconds: function() {
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if (!that.hasValue()) return 0;
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var s = that.value+'';
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if (s.match(/s$/)) return that.numValue() * 1000;
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if (s.match(/ms$/)) return that.numValue();
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return that.numValue();
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}
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}
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// angle extensions
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this.Angle = {
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// get the angle as radians
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toRadians: function() {
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if (!that.hasValue()) return 0;
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var s = that.value+'';
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if (s.match(/deg$/)) return that.numValue() * (Math.PI / 180.0);
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if (s.match(/grad$/)) return that.numValue() * (Math.PI / 200.0);
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if (s.match(/rad$/)) return that.numValue();
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return that.numValue() * (Math.PI / 180.0);
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}
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}
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}
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// fonts
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svg.Font = new (function() {
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this.Styles = ['normal','italic','oblique','inherit'];
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this.Variants = ['normal','small-caps','inherit'];
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this.Weights = ['normal','bold','bolder','lighter','100','200','300','400','500','600','700','800','900','inherit'];
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this.CreateFont = function(fontStyle, fontVariant, fontWeight, fontSize, fontFamily, inherit) {
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var f = inherit != null ? this.Parse(inherit) : this.CreateFont('', '', '', '', '', svg.ctx.font);
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return {
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fontFamily: fontFamily || f.fontFamily,
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fontSize: fontSize || f.fontSize,
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fontStyle: fontStyle || f.fontStyle,
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fontWeight: fontWeight || f.fontWeight,
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fontVariant: fontVariant || f.fontVariant,
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toString: function () { return [this.fontStyle, this.fontVariant, this.fontWeight, this.fontSize, this.fontFamily].join(' ') }
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}
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}
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var that = this;
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this.Parse = function(s) {
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var f = {};
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var d = svg.trim(svg.compressSpaces(s || '')).split(' ');
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var set = { fontSize: false, fontStyle: false, fontWeight: false, fontVariant: false }
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var ff = '';
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for (var i=0; i<d.length; i++) {
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if (!set.fontStyle && that.Styles.indexOf(d[i]) != -1) { if (d[i] != 'inherit') f.fontStyle = d[i]; set.fontStyle = true; }
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else if (!set.fontVariant && that.Variants.indexOf(d[i]) != -1) { if (d[i] != 'inherit') f.fontVariant = d[i]; set.fontStyle = set.fontVariant = true; }
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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; }
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else if (!set.fontSize) { if (d[i] != 'inherit') f.fontSize = d[i].split('/')[0]; set.fontStyle = set.fontVariant = set.fontWeight = set.fontSize = true; }
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else { if (d[i] != 'inherit') ff += d[i]; }
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} if (ff != '') f.fontFamily = ff;
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return f;
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}
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});
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// points and paths
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svg.ToNumberArray = function(s) {
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var a = svg.trim(svg.compressSpaces((s || '').replace(/,/g, ' '))).split(' ');
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for (var i=0; i<a.length; i++) {
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a[i] = parseFloat(a[i]);
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}
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return a;
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}
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svg.Point = function(x, y) {
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this.x = x;
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this.y = y;
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}
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svg.CreatePoint = function(s) {
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var a = svg.ToNumberArray(s);
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return new svg.Point(a[0], a[1]);
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}
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svg.CreatePath = function(s) {
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var a = svg.ToNumberArray(s);
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var path = [];
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for (var i=0; i<a.length; i+=2) {
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path.push(new svg.Point(a[i], a[i+1]));
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}
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return path;
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}
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// bounding box
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svg.BoundingBox = function(x1, y1, x2, y2) { // pass in initial points if you want
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this.x1 = Number.NaN;
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this.y1 = Number.NaN;
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this.x2 = Number.NaN;
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this.y2 = Number.NaN;
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this.x = function() { return this.x1; }
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this.y = function() { return this.y1; }
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this.width = function() { return this.x2 - this.x1; }
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this.height = function() { return this.y2 - this.y1; }
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this.addPoint = function(x, y) {
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if (x != null) {
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if (isNaN(this.x1) || isNaN(this.x2)) {
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this.x1 = x;
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this.x2 = x;
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}
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if (x < this.x1) this.x1 = x;
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if (x > this.x2) this.x2 = x;
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}
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if (y != null) {
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if (isNaN(this.y1) || isNaN(this.y2)) {
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this.y1 = y;
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this.y2 = y;
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}
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if (y < this.y1) this.y1 = y;
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if (y > this.y2) this.y2 = y;
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}
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}
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this.addX = function(x) { this.addPoint(x, null); }
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this.addY = function(y) { this.addPoint(null, y); }
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this.addQuadraticCurve = function(p0x, p0y, p1x, p1y, p2x, p2y) {
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var cp1x = p0x + 2/3 * (p1x - p0x); // CP1 = QP0 + 2/3 *(QP1-QP0)
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var cp1y = p0y + 2/3 * (p1y - p0y); // CP1 = QP0 + 2/3 *(QP1-QP0)
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var cp2x = cp1x + 1/3 * (p2x - p0x); // CP2 = CP1 + 1/3 *(QP2-QP0)
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var cp2y = cp1y + 1/3 * (p2y - p0y); // CP2 = CP1 + 1/3 *(QP2-QP0)
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this.addBezierCurve(p0x, p0y, cp1x, cp2x, cp1y, cp2y, p2x, p2y);
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}
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this.addBezierCurve = function(p0x, p0y, p1x, p1y, p2x, p2y, p3x, p3y) {
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// from http://blog.hackers-cafe.net/2009/06/how-to-calculate-bezier-curves-bounding.html
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var p0 = [p0x, p0y], p1 = [p1x, p1y], p2 = [p2x, p2y], p3 = [p3x, p3y];
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this.addPoint(p0[0], p0[1]);
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this.addPoint(p3[0], p3[1]);
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for (i=0; i<=1; i++) {
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var f = function(t) {
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return Math.pow(1-t, 3) * p0[i]
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+ 3 * Math.pow(1-t, 2) * t * p1[i]
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+ 3 * (1-t) * Math.pow(t, 2) * p2[i]
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+ Math.pow(t, 3) * p3[i];
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}
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var b = 6 * p0[i] - 12 * p1[i] + 6 * p2[i];
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var a = -3 * p0[i] + 9 * p1[i] - 9 * p2[i] + 3 * p3[i];
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var c = 3 * p1[i] - 3 * p0[i];
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if (a == 0) {
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if (b == 0) continue;
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var t = -c / b;
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if (0 < t && t < 1) {
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if (i == 0) this.addX(f(t));
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if (i == 1) this.addY(f(t));
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}
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continue;
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}
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var b2ac = Math.pow(b, 2) - 4 * c * a;
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if (b2ac < 0) continue;
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var t1 = (-b + Math.sqrt(b2ac)) / (2 * a);
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if (0 < t1 && t1 < 1) {
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if (i == 0) this.addX(f(t1));
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if (i == 1) this.addY(f(t1));
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}
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var t2 = (-b - Math.sqrt(b2ac)) / (2 * a);
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if (0 < t2 && t2 < 1) {
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if (i == 0) this.addX(f(t2));
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if (i == 1) this.addY(f(t2));
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}
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}
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}
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this.addPoint(x1, y1);
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this.addPoint(x2, y2);
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}
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// transforms
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svg.Transform = function(v) {
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var that = this;
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this.Type = {}
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// translate
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this.Type.translate = function(s) {
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this.p = svg.CreatePoint(s);
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this.apply = function(ctx) {
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ctx.translate(this.p.x || 0.0, this.p.y || 0.0);
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}
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}
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// rotate
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this.Type.rotate = function(s) {
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var a = svg.ToNumberArray(s);
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this.angle = new svg.Property('angle', a[0]);
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this.cx = a[1] || 0;
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this.cy = a[2] || 0;
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this.apply = function(ctx) {
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ctx.translate(this.cx, this.cy);
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ctx.rotate(this.angle.Angle.toRadians());
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ctx.translate(-this.cx, -this.cy);
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}
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}
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this.Type.scale = function(s) {
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this.p = svg.CreatePoint(s);
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this.apply = function(ctx) {
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ctx.scale(this.p.x || 1.0, this.p.y || this.p.x || 1.0);
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}
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}
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this.Type.matrix = function(s) {
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this.m = svg.ToNumberArray(s);
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this.apply = function(ctx) {
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ctx.transform(this.m[0], this.m[1], this.m[2], this.m[3], this.m[4], this.m[5]);
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}
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}
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this.Type.SkewBase = function(s) {
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this.base = that.Type.matrix;
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this.base(s);
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this.angle = new svg.Property('angle', s);
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}
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this.Type.SkewBase.prototype = new this.Type.matrix;
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this.Type.skewX = function(s) {
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this.base = that.Type.SkewBase;
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this.base(s);
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this.m = [1, 0, Math.tan(this.angle.Angle.toRadians()), 1, 0, 0];
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}
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this.Type.skewX.prototype = new this.Type.SkewBase;
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this.Type.skewY = function(s) {
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this.base = that.Type.SkewBase;
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this.base(s);
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this.m = [1, Math.tan(this.angle.Angle.toRadians()), 0, 1, 0, 0];
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}
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this.Type.skewY.prototype = new this.Type.SkewBase;
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this.transforms = [];
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this.apply = function(ctx) {
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for (var i=0; i<this.transforms.length; i++) {
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this.transforms[i].apply(ctx);
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}
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}
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var data = v.split(/\s(?=[a-z])/);
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for (var i=0; i<data.length; i++) {
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var type = data[i].split('(')[0];
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var s = data[i].split('(')[1].replace(')','');
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var transform = eval('new this.Type.' + type + '(s)');
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this.transforms.push(transform);
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}
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}
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// elements
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svg.Element = {}
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svg.Element.ElementBase = function(node) {
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this.attributes = {};
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this.styles = {};
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this.children = [];
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// get or create attribute
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this.attribute = function(name, createIfNotExists) {
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var a = this.attributes[name];
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if (a != null) return a;
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a = new svg.Property(name, '');
|
|
if (createIfNotExists == true) this.attributes[name] = a;
|
|
return a;
|
|
}
|
|
|
|
// get or create style
|
|
this.style = function(name, createIfNotExists) {
|
|
var s = this.styles[name];
|
|
if (s != null) return s;
|
|
|
|
var a = this.attribute(name);
|
|
if (a != null && a.hasValue()) {
|
|
return a;
|
|
}
|
|
|
|
s = new svg.Property(name, '');
|
|
if (createIfNotExists == true) this.styles[name] = s;
|
|
return s;
|
|
}
|
|
|
|
// base render
|
|
this.render = function(ctx) {
|
|
ctx.save();
|
|
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);
|
|
}
|
|
}
|
|
|
|
if (node != null) {
|
|
// add children
|
|
for (var i=0; i<node.childNodes.length; i++) {
|
|
var childNode = node.childNodes[i];
|
|
if (childNode.nodeType == 1) { //ELEMENT_NODE
|
|
var child = svg.CreateElement(childNode);
|
|
child.parent = this;
|
|
this.children.push(child);
|
|
}
|
|
}
|
|
|
|
// add attributes
|
|
for (var i=0; i<node.attributes.length; i++) {
|
|
var attribute = node.attributes[i];
|
|
this.attributes[attribute.nodeName] = new svg.Property(attribute.nodeName, attribute.nodeValue);
|
|
}
|
|
|
|
// add tag styles
|
|
var styles = svg.Styles[this.type];
|
|
if (styles != null) {
|
|
for (var name in styles) {
|
|
this.styles[name] = styles[name];
|
|
}
|
|
}
|
|
|
|
// add class styles
|
|
if (this.attribute('class').hasValue()) {
|
|
var classes = svg.compressSpaces(this.attribute('class').value).split(' ');
|
|
for (var j=0; j<classes.length; j++) {
|
|
styles = svg.Styles['.'+classes[j]];
|
|
if (styles != null) {
|
|
for (var name in styles) {
|
|
this.styles[name] = styles[name];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// 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);
|
|
}
|
|
}
|
|
}
|
|
|
|
// set id
|
|
if (this.attribute('id').hasValue()) svg.Definitions[this.attribute('id').value] = this;
|
|
}
|
|
}
|
|
|
|
svg.Element.RenderedElementBase = function(node) {
|
|
this.base = svg.Element.ElementBase;
|
|
this.base(node);
|
|
|
|
this.setContext = function(ctx) {
|
|
// fill
|
|
if (this.style('fill').Definition.isUrl()) {
|
|
var grad = this.style('fill').Definition.getGradient(this);
|
|
if (grad != null) ctx.fillStyle = grad;
|
|
}
|
|
else if (this.style('fill').hasValue()) {
|
|
var fillStyle = this.style('fill');
|
|
if (this.style('fill-opacity').hasValue()) fillStyle = fillStyle.Color.addOpacity(this.style('fill-opacity').value);
|
|
ctx.fillStyle = (fillStyle.value == 'none' ? 'rgba(0,0,0,0)' : fillStyle.value);
|
|
}
|
|
|
|
// stroke
|
|
if (this.style('stroke').Definition.isUrl()) {
|
|
var grad = this.style('stroke').Definition.getGradient(this);
|
|
if (grad != null) ctx.strokeStyle = grad;
|
|
}
|
|
else if (this.style('stroke').hasValue()) {
|
|
var strokeStyle = this.style('stroke');
|
|
if (this.style('stroke-opacity').hasValue()) strokeStyle = strokeStyle.Color.addOpacity(this.style('stroke-opacity').value);
|
|
ctx.strokeStyle = (strokeStyle.value == 'none' ? 'rgba(0,0,0,0)' : strokeStyle.value);
|
|
}
|
|
if (this.style('stroke-width').hasValue()) ctx.lineWidth = this.style('stroke-width').Length.toPixels();
|
|
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;
|
|
|
|
// 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').Length.toPixels() + 'px' : '',
|
|
this.style('font-family').value).toString();
|
|
}
|
|
|
|
// transform
|
|
if (this.attribute('transform').hasValue()) {
|
|
var transform = new svg.Transform(this.attribute('transform').value);
|
|
transform.apply(ctx);
|
|
}
|
|
|
|
// clip
|
|
if (this.attribute('clip-path').hasValue()) {
|
|
var clip = this.attribute('clip-path').Definition.getDefinition();
|
|
if (clip != null) clip.apply(ctx);
|
|
}
|
|
|
|
// opacity
|
|
if (this.style('opacity').hasValue()) {
|
|
ctx.globalAlpha = this.style('opacity').numValue();
|
|
}
|
|
}
|
|
}
|
|
svg.Element.RenderedElementBase.prototype = new svg.Element.ElementBase;
|
|
|
|
svg.Element.PathElementBase = function(node) {
|
|
this.base = svg.Element.RenderedElementBase;
|
|
this.base(node);
|
|
|
|
this.path = function(ctx) {
|
|
if (ctx != null) ctx.beginPath();
|
|
return new svg.BoundingBox();
|
|
}
|
|
|
|
this.renderChildren = function(ctx) {
|
|
this.path(ctx);
|
|
if (ctx.fillStyle != '') ctx.fill();
|
|
if (ctx.strokeStyle != '') ctx.stroke();
|
|
|
|
if (this.attribute('marker-end').Definition.isUrl()) {
|
|
var marker = this.attribute('marker-end').Definition.getDefinition();
|
|
var endPoint = this.getEndPoint();
|
|
var endAngle = this.getEndAngle();
|
|
if (endPoint != null && endAngle != null) {
|
|
marker.render(ctx, endPoint, endAngle);
|
|
}
|
|
}
|
|
}
|
|
|
|
this.getBoundingBox = function() {
|
|
return this.path();
|
|
}
|
|
|
|
this.getEndPoint = function() {
|
|
return null;
|
|
}
|
|
|
|
this.getEndAngle = function() {
|
|
return null;
|
|
}
|
|
}
|
|
svg.Element.PathElementBase.prototype = new svg.Element.RenderedElementBase;
|
|
|
|
// svg element
|
|
svg.Element.svg = function(node) {
|
|
this.base = svg.Element.RenderedElementBase;
|
|
this.base(node);
|
|
|
|
this.baseClearContext = this.clearContext;
|
|
this.clearContext = function(ctx) {
|
|
this.baseClearContext(ctx);
|
|
svg.ViewPort.RemoveCurrent();
|
|
}
|
|
|
|
this.baseSetContext = this.setContext;
|
|
this.setContext = function(ctx) {
|
|
this.baseSetContext(ctx);
|
|
|
|
// create new view port
|
|
if (this.attribute('x').hasValue() && this.attribute('y').hasValue()) {
|
|
ctx.translate(this.attribute('x').Length.toPixels('x'), this.attribute('y').Length.toPixels('y'));
|
|
}
|
|
|
|
var width = svg.ViewPort.width();
|
|
var height = svg.ViewPort.height();
|
|
if (this.attribute('width').hasValue() && this.attribute('height').hasValue()) {
|
|
width = this.attribute('width').Length.toPixels('x');
|
|
height = this.attribute('height').Length.toPixels('y');
|
|
|
|
var x = 0;
|
|
var y = 0;
|
|
if (this.attribute('refX').hasValue() && this.attribute('refY').hasValue()) {
|
|
x = -this.attribute('refX').Length.toPixels('x');
|
|
y = -this.attribute('refY').Length.toPixels('y');
|
|
}
|
|
|
|
ctx.beginPath();
|
|
ctx.moveTo(x, y);
|
|
ctx.lineTo(width, y);
|
|
ctx.lineTo(width, height);
|
|
ctx.lineTo(x, height);
|
|
ctx.closePath();
|
|
ctx.clip();
|
|
}
|
|
svg.ViewPort.SetCurrent(width, height);
|
|
|
|
// viewbox
|
|
if (this.attribute('viewBox').hasValue()) {
|
|
var viewBox = svg.ToNumberArray(this.attribute('viewBox').value);
|
|
var minX = viewBox[0];
|
|
var minY = viewBox[1];
|
|
width = viewBox[2];
|
|
height = viewBox[3];
|
|
|
|
// aspect ratio - http://www.w3.org/TR/SVG/coords.html#PreserveAspectRatioAttribute
|
|
var preserveAspectRatio = svg.compressSpaces(this.attribute('preserveAspectRatio').value);
|
|
preserveAspectRatio = preserveAspectRatio.replace(/^defer\s/,''); // ignore defer
|
|
var align = preserveAspectRatio.split(' ')[0] || 'xMidYMid';
|
|
var meetOrSlice = preserveAspectRatio.split(' ')[1] || 'meet';
|
|
|
|
// calculate scale
|
|
var scaleX = svg.ViewPort.width() / width;
|
|
var scaleY = svg.ViewPort.height() / height;
|
|
var scaleMin = Math.min(scaleX, scaleY);
|
|
var scaleMax = Math.max(scaleX, scaleY);
|
|
if (meetOrSlice == 'meet') { width *= scaleMin; height *= scaleMin; }
|
|
if (meetOrSlice == 'slice') { width *= scaleMax; height *= scaleMax; }
|
|
|
|
if (this.attribute('refX').hasValue() && this.attribute('refY').hasValue()) {
|
|
ctx.translate(-scaleMin * this.attribute('refX').Length.toPixels('x'), -scaleMin * this.attribute('refY').Length.toPixels('y'));
|
|
}
|
|
else {
|
|
// align
|
|
if (align.match(/^xMid/) && ((meetOrSlice == 'meet' && scaleMin == scaleY) || (meetOrSlice == 'slice' && scaleMax == scaleY))) ctx.translate(svg.ViewPort.width() / 2.0 - width / 2.0, 0);
|
|
if (align.match(/YMid$/) && ((meetOrSlice == 'meet' && scaleMin == scaleX) || (meetOrSlice == 'slice' && scaleMax == scaleX))) ctx.translate(0, svg.ViewPort.height() / 2.0 - height / 2.0);
|
|
if (align.match(/^xMax/) && ((meetOrSlice == 'meet' && scaleMin == scaleY) || (meetOrSlice == 'slice' && scaleMax == scaleY))) ctx.translate(svg.ViewPort.width() - width, 0);
|
|
if (align.match(/YMax$/) && ((meetOrSlice == 'meet' && scaleMin == scaleX) || (meetOrSlice == 'slice' && scaleMax == scaleX))) ctx.translate(0, svg.ViewPort.height() - height);
|
|
}
|
|
|
|
// scale
|
|
if (meetOrSlice == 'meet') ctx.scale(scaleMin, scaleMin);
|
|
if (meetOrSlice == 'slice') ctx.scale(scaleMax, scaleMax);
|
|
ctx.translate(-minX, -minY);
|
|
|
|
svg.ViewPort.RemoveCurrent();
|
|
svg.ViewPort.SetCurrent(viewBox[2], viewBox[3]);
|
|
}
|
|
|
|
// initial values
|
|
ctx.strokeStyle = 'rgba(0,0,0,0)';
|
|
ctx.lineCap = 'butt';
|
|
ctx.lineJoin = 'miter';
|
|
ctx.miterLimit = 4;
|
|
}
|
|
}
|
|
svg.Element.svg.prototype = new svg.Element.RenderedElementBase;
|
|
|
|
// rect element
|
|
svg.Element.rect = function(node) {
|
|
this.base = svg.Element.PathElementBase;
|
|
this.base(node);
|
|
|
|
this.path = function(ctx) {
|
|
var x = this.attribute('x').Length.toPixels('x');
|
|
var y = this.attribute('y').Length.toPixels('y');
|
|
var width = this.attribute('width').Length.toPixels('x');
|
|
var height = this.attribute('height').Length.toPixels('y');
|
|
var rx = this.attribute('rx').Length.toPixels('x');
|
|
var ry = this.attribute('ry').Length.toPixels('y');
|
|
if (this.attribute('rx').hasValue() && !this.attribute('ry').hasValue()) ry = rx;
|
|
if (this.attribute('ry').hasValue() && !this.attribute('rx').hasValue()) rx = ry;
|
|
|
|
if (ctx != null) {
|
|
ctx.beginPath();
|
|
ctx.moveTo(x + rx, y);
|
|
ctx.lineTo(x + width - rx, y);
|
|
ctx.quadraticCurveTo(x + width, y, x + width, y + ry)
|
|
ctx.lineTo(x + width, y + height - ry);
|
|
ctx.quadraticCurveTo(x + width, y + height, x + width - rx, y + height)
|
|
ctx.lineTo(x + rx, y + height);
|
|
ctx.quadraticCurveTo(x, y + height, x, y + height - ry)
|
|
ctx.lineTo(x, y + ry);
|
|
ctx.quadraticCurveTo(x, y, x + rx, y)
|
|
ctx.closePath();
|
|
}
|
|
|
|
return new svg.BoundingBox(x, y, x + width, y + height);
|
|
}
|
|
}
|
|
svg.Element.rect.prototype = new svg.Element.PathElementBase;
|
|
|
|
// circle element
|
|
svg.Element.circle = function(node) {
|
|
this.base = svg.Element.PathElementBase;
|
|
this.base(node);
|
|
|
|
this.path = function(ctx) {
|
|
var cx = this.attribute('cx').Length.toPixels('x');
|
|
var cy = this.attribute('cy').Length.toPixels('y');
|
|
var r = this.attribute('r').Length.toPixels();
|
|
|
|
if (ctx != null) {
|
|
ctx.beginPath();
|
|
ctx.arc(cx, cy, r, 0, Math.PI * 2, true);
|
|
ctx.closePath();
|
|
}
|
|
|
|
return new svg.BoundingBox(cx - r, cy - r, cx + r, cy + r);
|
|
}
|
|
}
|
|
svg.Element.circle.prototype = new svg.Element.PathElementBase;
|
|
|
|
// ellipse element
|
|
svg.Element.ellipse = function(node) {
|
|
this.base = svg.Element.PathElementBase;
|
|
this.base(node);
|
|
|
|
this.path = function(ctx) {
|
|
var KAPPA = 4 * ((Math.sqrt(2) - 1) / 3);
|
|
var rx = this.attribute('rx').Length.toPixels('x');
|
|
var ry = this.attribute('ry').Length.toPixels('y');
|
|
var cx = this.attribute('cx').Length.toPixels('x');
|
|
var cy = this.attribute('cy').Length.toPixels('y');
|
|
|
|
if (ctx != null) {
|
|
ctx.beginPath();
|
|
ctx.moveTo(cx, cy - ry);
|
|
ctx.bezierCurveTo(cx + (KAPPA * rx), cy - ry, cx + rx, cy - (KAPPA * ry), cx + rx, cy);
|
|
ctx.bezierCurveTo(cx + rx, cy + (KAPPA * ry), cx + (KAPPA * rx), cy + ry, cx, cy + ry);
|
|
ctx.bezierCurveTo(cx - (KAPPA * rx), cy + ry, cx - rx, cy + (KAPPA * ry), cx - rx, cy);
|
|
ctx.bezierCurveTo(cx - rx, cy - (KAPPA * ry), cx - (KAPPA * rx), cy - ry, cx, cy - ry);
|
|
ctx.closePath();
|
|
}
|
|
|
|
return new svg.BoundingBox(cx - rx, cy - ry, cx + rx, cy + ry);
|
|
}
|
|
}
|
|
svg.Element.ellipse.prototype = new svg.Element.PathElementBase;
|
|
|
|
// line element
|
|
svg.Element.line = function(node) {
|
|
this.base = svg.Element.PathElementBase;
|
|
this.base(node);
|
|
|
|
this.path = function(ctx) {
|
|
var x1 = this.attribute('x1').Length.toPixels('x');
|
|
var y1 = this.attribute('y1').Length.toPixels('y');
|
|
var x2 = this.attribute('x2').Length.toPixels('x');
|
|
var y2 = this.attribute('y2').Length.toPixels('y');
|
|
|
|
if (ctx != null) {
|
|
ctx.beginPath();
|
|
ctx.moveTo(x1, y1);
|
|
ctx.lineTo(x2, y2);
|
|
}
|
|
|
|
return new svg.BoundingBox(x1, y1, x2, y2);
|
|
}
|
|
|
|
this.getEndPoint = function() {
|
|
var x2 = this.attribute('x2').Length.toPixels('x');
|
|
var y2 = this.attribute('y2').Length.toPixels('y');
|
|
return new svg.Point(x2, y2);
|
|
}
|
|
|
|
this.getEndAngle = function() {
|
|
var x1 = this.attribute('x1').Length.toPixels('x');
|
|
var y1 = this.attribute('y1').Length.toPixels('y');
|
|
var x2 = this.attribute('x2').Length.toPixels('x');
|
|
var y2 = this.attribute('y2').Length.toPixels('y');
|
|
return Math.atan((y2-y1)/(x2-x1));
|
|
}
|
|
}
|
|
svg.Element.line.prototype = new svg.Element.PathElementBase;
|
|
|
|
// polyline element
|
|
svg.Element.polyline = function(node) {
|
|
this.base = svg.Element.PathElementBase;
|
|
this.base(node);
|
|
|
|
this.points = svg.CreatePath(this.attribute('points').value);
|
|
this.path = function(ctx) {
|
|
var bb = new svg.BoundingBox(this.points[0].x, this.points[0].y);
|
|
if (ctx != null) {
|
|
ctx.beginPath();
|
|
ctx.moveTo(this.points[0].x, this.points[0].y);
|
|
}
|
|
for (var i=1; i<this.points.length; i++) {
|
|
bb.addPoint(this.points[i].x, this.points[i].y);
|
|
if (ctx != null) ctx.lineTo(this.points[i].x, this.points[i].y);
|
|
}
|
|
return bb;
|
|
}
|
|
}
|
|
svg.Element.polyline.prototype = new svg.Element.PathElementBase;
|
|
|
|
// polygon element
|
|
svg.Element.polygon = function(node) {
|
|
this.base = svg.Element.polyline;
|
|
this.base(node);
|
|
|
|
this.basePath = this.path;
|
|
this.path = function(ctx) {
|
|
var bb = this.basePath(ctx);
|
|
if (ctx != null) {
|
|
ctx.lineTo(this.points[0].x, this.points[0].y);
|
|
ctx.closePath();
|
|
}
|
|
return bb;
|
|
}
|
|
}
|
|
svg.Element.polygon.prototype = new svg.Element.polyline;
|
|
|
|
// path element
|
|
svg.Element.path = function(node) {
|
|
this.base = svg.Element.PathElementBase;
|
|
this.base(node);
|
|
|
|
var d = this.attribute('d').value;
|
|
// TODO: floating points, convert to real lexer based on http://www.w3.org/TR/SVG11/paths.html#PathDataBNF
|
|
d = d.replace(/,/gm,' '); // get rid of all commas
|
|
d = d.replace(/([A-Za-z])([A-Za-z])/gm,'$1 $2'); // separate commands from commands
|
|
d = d.replace(/([A-Za-z])([A-Za-z])/gm,'$1 $2'); // separate commands from commands
|
|
d = d.replace(/([A-Za-z])([^\s])/gm,'$1 $2'); // separate commands from points
|
|
d = d.replace(/([^\s])([A-Za-z])/gm,'$1 $2'); // separate commands from points
|
|
d = d.replace(/([0-9])([+\-])/gm,'$1 $2'); // separate digits when no comma
|
|
d = d.replace(/(\.[0-9]*)(\.)/gm,'$1 $2'); // separate digits when no comma
|
|
d = d.replace(/([Aa](\s+[0-9]+){3})\s+([01])\s*([01])/gm,'$1 $3 $4 '); // shorthand elliptical arc path syntax
|
|
d = svg.compressSpaces(d); // compress multiple spaces
|
|
d = svg.trim(d);
|
|
this.PathParser = new (function(d) {
|
|
this.tokens = d.split(' ');
|
|
|
|
this.reset = function() {
|
|
this.i = -1;
|
|
this.command = '';
|
|
this.control = new svg.Point(0, 0);
|
|
this.last = new svg.Point(0, 0);
|
|
this.current = new svg.Point(0, 0);
|
|
}
|
|
|
|
this.angle = function() {
|
|
return Math.atan((this.current.y - this.last.y) / (this.current.x - this.last.x));
|
|
}
|
|
|
|
this.setCurrent = function(p) {
|
|
this.last = this.current;
|
|
this.current = p;
|
|
}
|
|
|
|
this.isEnd = function() {
|
|
return this.i == this.tokens.length - 1;
|
|
}
|
|
|
|
this.isCommandOrEnd = function() {
|
|
if (this.isEnd()) return true;
|
|
return this.tokens[this.i + 1].match(/[A-Za-z]/) != null;
|
|
}
|
|
|
|
this.isRelativeCommand = function() {
|
|
return this.command == this.command.toLowerCase();
|
|
}
|
|
|
|
this.getToken = function() {
|
|
this.i = this.i + 1;
|
|
return this.tokens[this.i];
|
|
}
|
|
|
|
this.getScalar = function() {
|
|
return parseFloat(this.getToken());
|
|
}
|
|
|
|
this.nextCommand = function() {
|
|
this.command = this.getToken();
|
|
}
|
|
|
|
this.getPoint = function() {
|
|
var p = new svg.Point(this.getScalar(), this.getScalar());
|
|
return this.makeAbsolute(p);
|
|
}
|
|
|
|
this.getAsControlPoint = function() {
|
|
var p = this.getPoint();
|
|
this.control = p;
|
|
return p;
|
|
}
|
|
|
|
this.getAsCurrentPoint = function() {
|
|
var p = this.getPoint();
|
|
this.setCurrent(p);
|
|
return p;
|
|
}
|
|
|
|
this.getReflectedControlPoint = function() {
|
|
var p = new svg.Point(2 * this.current.x - this.control.x, 2 * this.current.y - this.control.y);
|
|
return this.makeAbsolute(p);
|
|
}
|
|
|
|
this.makeAbsolute = function(p) {
|
|
if (this.isRelativeCommand()) {
|
|
p.x = this.current.x + p.x;
|
|
p.y = this.current.y + p.y;
|
|
}
|
|
return p;
|
|
}
|
|
})(d);
|
|
|
|
this.path = function(ctx) {
|
|
var pp = this.PathParser;
|
|
pp.reset();
|
|
|
|
var bb = new svg.BoundingBox();
|
|
if (ctx != null) ctx.beginPath();
|
|
while (!pp.isEnd()) {
|
|
pp.nextCommand();
|
|
if (pp.command.toUpperCase() == 'M') {
|
|
var p = pp.getAsCurrentPoint();
|
|
bb.addPoint(p.x, p.y);
|
|
if (ctx != null) ctx.moveTo(p.x, p.y);
|
|
while (!pp.isCommandOrEnd()) {
|
|
var p = pp.getAsCurrentPoint();
|
|
bb.addPoint(p.x, p.y);
|
|
if (ctx != null) ctx.lineTo(p.x, p.y);
|
|
}
|
|
}
|
|
else if (pp.command.toUpperCase() == 'L') {
|
|
while (!pp.isCommandOrEnd()) {
|
|
var p = pp.getAsCurrentPoint();
|
|
bb.addPoint(p.x, p.y);
|
|
if (ctx != null) ctx.lineTo(p.x, p.y);
|
|
}
|
|
}
|
|
else if (pp.command.toUpperCase() == 'H') {
|
|
while (!pp.isCommandOrEnd()) {
|
|
pp.current.x = (pp.isRelativeCommand() ? pp.current.x : 0) + pp.getScalar();
|
|
pp.setCurrent(pp.current);
|
|
bb.addPoint(pp.current.x, pp.current.y);
|
|
if (ctx != null) ctx.lineTo(pp.current.x, pp.current.y);
|
|
}
|
|
}
|
|
else if (pp.command.toUpperCase() == 'V') {
|
|
while (!pp.isCommandOrEnd()) {
|
|
pp.current.y = (pp.isRelativeCommand() ? pp.current.y : 0) + pp.getScalar();
|
|
pp.setCurrent(pp.current);
|
|
bb.addPoint(pp.current.x, pp.current.y);
|
|
if (ctx != null) ctx.lineTo(pp.current.x, pp.current.y);
|
|
}
|
|
}
|
|
else if (pp.command.toUpperCase() == 'C') {
|
|
while (!pp.isCommandOrEnd()) {
|
|
var curr = pp.current;
|
|
var p1 = pp.getPoint();
|
|
var cntrl = pp.getAsControlPoint();
|
|
var cp = pp.getAsCurrentPoint();
|
|
bb.addBezierCurve(curr.x, curr.y, p1.x, p1.y, cntrl.x, cntrl.y, cp.x, cp.y);
|
|
if (ctx != null) ctx.bezierCurveTo(p1.x, p1.y, cntrl.x, cntrl.y, cp.x, cp.y);
|
|
}
|
|
}
|
|
else if (pp.command.toUpperCase() == 'S') {
|
|
while (!pp.isCommandOrEnd()) {
|
|
var curr = pp.current;
|
|
var p1 = pp.getReflectedControlPoint();
|
|
var cntrl = pp.getAsControlPoint();
|
|
var cp = pp.getAsCurrentPoint();
|
|
bb.addBezierCurve(curr.x, curr.y, p1.x, p1.y, cntrl.x, cntrl.y, cp.x, cp.y);
|
|
if (ctx != null) ctx.bezierCurveTo(p1.x, p1.y, cntrl.x, cntrl.y, cp.x, cp.y);
|
|
}
|
|
}
|
|
else if (pp.command.toUpperCase() == 'Q') {
|
|
while (!pp.isCommandOrEnd()) {
|
|
var curr = pp.current;
|
|
var cntrl = pp.getAsControlPoint();
|
|
var cp = pp.getAsCurrentPoint();
|
|
bb.addQuadraticCurve(curr.x, curr.y, cntrl.x, cntrl.y, cp.x, cp.y);
|
|
if (ctx != null) ctx.quadraticCurveTo(cntrl.x, cntrl.y, cp.x, cp.y);
|
|
}
|
|
}
|
|
else if (pp.command.toUpperCase() == 'T') {
|
|
while (!pp.isCommandOrEnd()) {
|
|
var curr = pp.current;
|
|
var cntrl = pp.getReflectedControlPoint();
|
|
pp.control = cntrl;
|
|
var cp = pp.getAsCurrentPoint();
|
|
bb.addQuadraticCurve(curr.x, curr.y, cntrl.x, cntrl.y, cp.x, cp.y);
|
|
if (ctx != null) ctx.quadraticCurveTo(cntrl.x, cntrl.y, cp.x, cp.y);
|
|
}
|
|
}
|
|
else if (pp.command.toUpperCase() == 'A') {
|
|
while (!pp.isCommandOrEnd()) {
|
|
var curr = pp.current;
|
|
var rx = pp.getScalar();
|
|
var ry = pp.getScalar();
|
|
var xAxisRotation = pp.getScalar() * (Math.PI / 180.0);
|
|
var largeArcFlag = pp.getScalar();
|
|
var sweepFlag = pp.getScalar();
|
|
var cp = pp.getAsCurrentPoint();
|
|
|
|
// Conversion from endpoint to center parameterization
|
|
// http://www.w3.org/TR/SVG11/implnote.html#ArcImplementationNotes
|
|
// x1', y1'
|
|
var currp = new svg.Point(
|
|
Math.cos(xAxisRotation) * (curr.x - cp.x) / 2.0 + Math.sin(xAxisRotation) * (curr.y - cp.y) / 2.0,
|
|
-Math.sin(xAxisRotation) * (curr.x - cp.x) / 2.0 + Math.cos(xAxisRotation) * (curr.y - cp.y) / 2.0
|
|
);
|
|
// cx', cy'
|
|
var s = (largeArcFlag == sweepFlag ? -1 : 1) * Math.sqrt(
|
|
((Math.pow(rx,2)*Math.pow(ry,2))-(Math.pow(rx,2)*Math.pow(currp.y,2))-(Math.pow(ry,2)*Math.pow(currp.x,2))) /
|
|
(Math.pow(rx,2)*Math.pow(currp.y,2)+Math.pow(ry,2)*Math.pow(currp.x,2))
|
|
);
|
|
if (isNaN(s)) s = 0;
|
|
var cpp = new svg.Point(s * rx * currp.y / ry, s * -ry * currp.x / rx);
|
|
// cx, cy
|
|
var centp = new svg.Point(
|
|
(curr.x + cp.x) / 2.0 + Math.cos(xAxisRotation) * cpp.x - Math.sin(xAxisRotation) * cpp.y,
|
|
(curr.y + cp.y) / 2.0 + Math.sin(xAxisRotation) * cpp.x + Math.cos(xAxisRotation) * cpp.y
|
|
);
|
|
// vector magnitude
|
|
var m = function(v) { return Math.sqrt(Math.pow(v[0],2) + Math.pow(v[1],2)); }
|
|
// angle between two vectors
|
|
var a = function(u, v) { return (u[0]*v[1] < u[1]*v[0] ? -1 : 1) * Math.acos((u[0]*v[0]+u[1]*v[1]) / (m(u)*m(v))); }
|
|
// initial angle
|
|
var a1 = a([1,0], [(currp.x-cpp.x)/rx,(currp.y-cpp.y)/ry]);
|
|
// angle delta
|
|
var ad = a([(currp.x-cpp.x)/rx,(currp.y-cpp.y)/ry], [(-currp.x-cpp.x)/rx,(-currp.y-cpp.y)/ry]);
|
|
if (sweepFlag == 0 && ad > 0) ad = ad - 2 * Math.PI;
|
|
if (sweepFlag == 1 && ad < 0) ad = ad + 2 * Math.PI;
|
|
|
|
bb.addPoint(cp.x, cp.y); // TODO: this is too naive, make it better
|
|
if (ctx != null) {
|
|
var r = rx > ry ? rx : ry;
|
|
var sx = rx > ry ? 1 : rx / ry;
|
|
var sy = rx > ry ? ry / rx : 1;
|
|
|
|
ctx.translate(centp.x, centp.y);
|
|
ctx.rotate(xAxisRotation);
|
|
ctx.scale(sx, sy);
|
|
ctx.arc(0, 0, r, a1, a1 + ad, 1 - sweepFlag);
|
|
ctx.scale(1/sx, 1/sy);
|
|
ctx.rotate(-xAxisRotation);
|
|
ctx.translate(-centp.x, -centp.y);
|
|
}
|
|
}
|
|
}
|
|
else if (pp.command.toUpperCase() == 'Z') {
|
|
if (ctx != null) ctx.closePath();
|
|
}
|
|
}
|
|
|
|
return bb;
|
|
}
|
|
|
|
this.getEndPoint = function() {
|
|
return this.PathParser.current;
|
|
}
|
|
|
|
this.getEndAngle = function() {
|
|
return this.PathParser.angle();
|
|
}
|
|
}
|
|
svg.Element.path.prototype = new svg.Element.PathElementBase;
|
|
|
|
svg.Element.marker = function(node) {
|
|
this.base = svg.Element.ElementBase;
|
|
this.base(node);
|
|
|
|
this.baseRender = this.render;
|
|
this.render = function(ctx, endPoint, endAngle) {
|
|
ctx.translate(endPoint.x, endPoint.y);
|
|
if (this.attribute('orient').valueOrDefault('auto') == 'auto') ctx.rotate(endAngle);
|
|
if (this.attribute('markerUnits').valueOrDefault('strokeWidth') == 'strokeWidth') ctx.scale(ctx.lineWidth, ctx.lineWidth);
|
|
ctx.save();
|
|
|
|
// render me using a temporary svg element
|
|
var tempSvg = new svg.Element.svg();
|
|
tempSvg.attributes['viewBox'] = new svg.Property('viewBox', this.attribute('viewBox').value);
|
|
tempSvg.attributes['refX'] = new svg.Property('refX', this.attribute('refX').value);
|
|
tempSvg.attributes['refY'] = new svg.Property('refY', this.attribute('refY').value);
|
|
tempSvg.attributes['width'] = new svg.Property('width', this.attribute('markerWidth').value);
|
|
tempSvg.attributes['height'] = new svg.Property('height', this.attribute('markerHeight').value);
|
|
tempSvg.attributes['fill'] = new svg.Property('fill', this.attribute('fill').valueOrDefault('black'));
|
|
tempSvg.attributes['stroke'] = new svg.Property('stroke', this.attribute('stroke').valueOrDefault('none'));
|
|
tempSvg.children = this.children;
|
|
tempSvg.render(ctx);
|
|
|
|
ctx.restore();
|
|
if (this.attribute('markerUnits').valueOrDefault('strokeWidth') == 'strokeWidth') ctx.scale(1/ctx.lineWidth, 1/ctx.lineWidth);
|
|
if (this.attribute('orient').valueOrDefault('auto') == 'auto') ctx.rotate(-endAngle);
|
|
ctx.translate(-endPoint.x, -endPoint.y);
|
|
}
|
|
}
|
|
svg.Element.marker.prototype = new svg.Element.ElementBase;
|
|
|
|
// definitions element
|
|
svg.Element.defs = function(node) {
|
|
this.base = svg.Element.ElementBase;
|
|
this.base(node);
|
|
|
|
this.render = function(ctx) {
|
|
// NOOP
|
|
}
|
|
}
|
|
svg.Element.defs.prototype = new svg.Element.ElementBase;
|
|
|
|
// base for gradients
|
|
svg.Element.GradientBase = function(node) {
|
|
this.base = svg.Element.ElementBase;
|
|
this.base(node);
|
|
|
|
this.gradientUnits = this.attribute('gradientUnits').valueOrDefault('objectBoundingBox');
|
|
|
|
this.stops = [];
|
|
for (var i=0; i<this.children.length; i++) {
|
|
var child = this.children[i];
|
|
this.stops.push(child);
|
|
}
|
|
|
|
this.getGradient = function() {
|
|
// OVERRIDE ME!
|
|
}
|
|
|
|
this.createGradient = function(ctx, element) {
|
|
var g = this.getGradient(ctx, element);
|
|
for (var i=0; i<this.stops.length; i++) {
|
|
g.addColorStop(this.stops[i].offset, this.stops[i].color);
|
|
}
|
|
return g;
|
|
}
|
|
}
|
|
svg.Element.GradientBase.prototype = new svg.Element.ElementBase;
|
|
|
|
// linear gradient element
|
|
svg.Element.linearGradient = function(node) {
|
|
this.base = svg.Element.GradientBase;
|
|
this.base(node);
|
|
|
|
this.getGradient = function(ctx, element) {
|
|
var bb = element.getBoundingBox();
|
|
|
|
var x1 = (this.gradientUnits == 'objectBoundingBox'
|
|
? bb.x() + bb.width() * this.attribute('x1').numValue()
|
|
: this.attribute('x1').Length.toPixels('x'));
|
|
var y1 = (this.gradientUnits == 'objectBoundingBox'
|
|
? bb.y() + bb.height() * this.attribute('y1').numValue()
|
|
: this.attribute('y1').Length.toPixels('y'));
|
|
var x2 = (this.gradientUnits == 'objectBoundingBox'
|
|
? bb.x() + bb.width() * this.attribute('x2').numValue()
|
|
: this.attribute('x2').Length.toPixels('x'));
|
|
var y2 = (this.gradientUnits == 'objectBoundingBox'
|
|
? bb.y() + bb.height() * this.attribute('y2').numValue()
|
|
: this.attribute('y2').Length.toPixels('y'));
|
|
|
|
return ctx.createLinearGradient(x1, y1, x2, y2);
|
|
}
|
|
}
|
|
svg.Element.linearGradient.prototype = new svg.Element.GradientBase;
|
|
|
|
// radial gradient element
|
|
svg.Element.radialGradient = function(node) {
|
|
this.base = svg.Element.GradientBase;
|
|
this.base(node);
|
|
|
|
this.getGradient = function(ctx, element) {
|
|
var bb = element.getBoundingBox();
|
|
|
|
var cx = (this.gradientUnits == 'objectBoundingBox'
|
|
? bb.x() + bb.width() * this.attribute('cx').numValue()
|
|
: this.attribute('cx').Length.toPixels('x'));
|
|
var cy = (this.gradientUnits == 'objectBoundingBox'
|
|
? bb.y() + bb.height() * this.attribute('cy').numValue()
|
|
: this.attribute('cy').Length.toPixels('y'));
|
|
|
|
var fx = cx;
|
|
var fy = cy;
|
|
if (this.attribute('fx').hasValue()) {
|
|
fx = (this.gradientUnits == 'objectBoundingBox'
|
|
? bb.x() + bb.width() * this.attribute('fx').numValue()
|
|
: this.attribute('fx').Length.toPixels('x'));
|
|
}
|
|
if (this.attribute('fy').hasValue()) {
|
|
fy = (this.gradientUnits == 'objectBoundingBox'
|
|
? bb.y() + bb.height() * this.attribute('fy').numValue()
|
|
: this.attribute('fy').Length.toPixels('y'));
|
|
}
|
|
|
|
var r = (this.gradientUnits == 'objectBoundingBox'
|
|
? (bb.width() + bb.height()) / 2.0 * this.attribute('r').numValue()
|
|
: this.attribute('r').Length.toPixels());
|
|
|
|
return ctx.createRadialGradient(fx, fy, 0, cx, cy, r);
|
|
}
|
|
}
|
|
svg.Element.radialGradient.prototype = new svg.Element.GradientBase;
|
|
|
|
// gradient stop element
|
|
svg.Element.stop = function(node) {
|
|
this.base = svg.Element.ElementBase;
|
|
this.base(node);
|
|
|
|
this.offset = this.attribute('offset').numValue();
|
|
|
|
var stopColor = this.style('stop-color');
|
|
if (this.style('stop-opacity').hasValue()) stopColor = stopColor.Color.addOpacity(this.style('stop-opacity').value);
|
|
this.color = stopColor.value;
|
|
}
|
|
svg.Element.stop.prototype = new svg.Element.ElementBase;
|
|
|
|
// animation base element
|
|
svg.Element.AnimateBase = function(node) {
|
|
this.base = svg.Element.ElementBase;
|
|
this.base(node);
|
|
|
|
svg.Animations.push(this);
|
|
|
|
this.duration = 0.0;
|
|
this.begin = this.attribute('begin').Time.toMilliseconds();
|
|
this.maxDuration = this.begin + this.attribute('dur').Time.toMilliseconds();
|
|
|
|
this.calcValue = function() {
|
|
// OVERRIDE ME!
|
|
return '';
|
|
}
|
|
|
|
this.update = function(delta) {
|
|
// if we're past the end time
|
|
if (this.duration > this.maxDuration) {
|
|
// loop for indefinitely repeating animations
|
|
if (this.attribute('repeatCount').value == 'indefinite') {
|
|
this.duration = 0.0
|
|
}
|
|
else {
|
|
return false; // no updates made
|
|
}
|
|
}
|
|
this.duration = this.duration + delta;
|
|
|
|
// if we're past the begin time
|
|
var updated = false;
|
|
if (this.begin < this.duration) {
|
|
var newValue = this.calcValue(); // tween
|
|
var attributeType = this.attribute('attributeType').value;
|
|
var attributeName = this.attribute('attributeName').value;
|
|
|
|
if (this.parent != null) {
|
|
if (attributeType == 'CSS') {
|
|
this.parent.style(attributeName, true).value = newValue;
|
|
}
|
|
else { // default or XML
|
|
if (this.attribute('type').hasValue()) {
|
|
// for transform, etc.
|
|
var type = this.attribute('type').value;
|
|
this.parent.attribute(attributeName, true).value = type + '(' + newValue + ')';
|
|
}
|
|
else {
|
|
this.parent.attribute(attributeName, true).value = newValue;
|
|
}
|
|
}
|
|
updated = true;
|
|
}
|
|
}
|
|
|
|
return updated;
|
|
}
|
|
|
|
// fraction of duration we've covered
|
|
this.progress = function() {
|
|
return ((this.duration - this.begin) / (this.maxDuration - this.begin));
|
|
}
|
|
}
|
|
svg.Element.AnimateBase.prototype = new svg.Element.ElementBase;
|
|
|
|
// animate element
|
|
svg.Element.animate = function(node) {
|
|
this.base = svg.Element.AnimateBase;
|
|
this.base(node);
|
|
|
|
this.calcValue = function() {
|
|
var from = this.attribute('from').numValue();
|
|
var to = this.attribute('to').numValue();
|
|
|
|
// tween value linearly
|
|
return from + (to - from) * this.progress();
|
|
};
|
|
}
|
|
svg.Element.animate.prototype = new svg.Element.AnimateBase;
|
|
|
|
// animate color element
|
|
svg.Element.animateColor = function(node) {
|
|
this.base = svg.Element.AnimateBase;
|
|
this.base(node);
|
|
|
|
this.calcValue = function() {
|
|
var from = new RGBColor(this.attribute('from').value);
|
|
var to = new RGBColor(this.attribute('to').value);
|
|
|
|
if (from.ok && to.ok) {
|
|
// tween color linearly
|
|
var r = from.r + (to.r - from.r) * this.progress();
|
|
var g = from.g + (to.g - from.g) * this.progress();
|
|
var b = from.b + (to.b - from.b) * this.progress();
|
|
return 'rgb('+parseInt(r,10)+','+parseInt(g,10)+','+parseInt(b,10)+')';
|
|
}
|
|
return this.attribute('from').value;
|
|
};
|
|
}
|
|
svg.Element.animateColor.prototype = new svg.Element.AnimateBase;
|
|
|
|
// animate transform element
|
|
svg.Element.animateTransform = function(node) {
|
|
this.base = svg.Element.animate;
|
|
this.base(node);
|
|
}
|
|
svg.Element.animateTransform.prototype = new svg.Element.animate;
|
|
|
|
// text element
|
|
svg.Element.text = function(node) {
|
|
this.base = svg.Element.RenderedElementBase;
|
|
this.base(node);
|
|
|
|
// accumulate all the child text nodes, then trim them
|
|
this.text = '';
|
|
for (var i=0; i<node.childNodes.length; i++) {
|
|
if (node.childNodes[i].nodeType == 3) { // TEXT
|
|
this.text = this.text + node.childNodes[i].nodeValue;
|
|
}
|
|
}
|
|
this.text = svg.trim(this.text);
|
|
|
|
this.baseSetContext = this.setContext;
|
|
this.setContext = function(ctx) {
|
|
this.baseSetContext(ctx);
|
|
if (this.attribute('text-anchor').hasValue()) {
|
|
var textAnchor = this.attribute('text-anchor').value;
|
|
ctx.textAlign = textAnchor == 'middle' ? 'center' : textAnchor;
|
|
}
|
|
if (this.attribute('alignment-baseline').hasValue()) ctx.textBaseline = this.attribute('alignment-baseline').value;
|
|
}
|
|
|
|
this.renderChildren = function(ctx) {
|
|
var x = this.attribute('x').Length.toPixels('x');
|
|
var y = this.attribute('y').Length.toPixels('y');
|
|
if (ctx.fillText) ctx.fillText(this.text, x, y);
|
|
}
|
|
}
|
|
svg.Element.text.prototype = new svg.Element.RenderedElementBase;
|
|
|
|
// group element
|
|
svg.Element.g = function(node) {
|
|
this.base = svg.Element.RenderedElementBase;
|
|
this.base(node);
|
|
}
|
|
svg.Element.g.prototype = new svg.Element.RenderedElementBase;
|
|
|
|
svg.Element.a = function(node) {
|
|
this.base = svg.Element.RenderedElementBase;
|
|
this.base(node);
|
|
}
|
|
svg.Element.a.prototype = new svg.Element.RenderedElementBase;
|
|
|
|
svg.Element.style = function(node) {
|
|
this.base = svg.Element.ElementBase;
|
|
this.base(node);
|
|
|
|
var css = node.childNodes[0].nodeValue;
|
|
css = css.replace(/(\/\*([^*]|[\r\n]|(\*+([^*\/]|[\r\n])))*\*+\/)|(\/\/.*)/gm, ''); // remove comments
|
|
css = svg.compressSpaces(css); // replace whitespace
|
|
var cssDefs = css.split('}');
|
|
for (var i=0; i<cssDefs.length; i++) {
|
|
if (svg.trim(cssDefs[i]) != '') {
|
|
var cssDef = cssDefs[i].split('{');
|
|
var cssClasses = cssDef[0].split(',');
|
|
var cssProps = cssDef[1].split(';');
|
|
for (var j=0; j<cssClasses.length; j++) {
|
|
var cssClass = svg.trim(cssClasses[j]);
|
|
if (cssClass != '') {
|
|
var props = {};
|
|
for (var k=0; k<cssProps.length; k++) {
|
|
var prop = cssProps[k].split(':');
|
|
var name = prop[0];
|
|
var value = prop[1];
|
|
if (name != null && value != null) {
|
|
props[svg.trim(prop[0])] = new svg.Property(svg.trim(prop[0]), svg.trim(prop[1]));
|
|
}
|
|
}
|
|
svg.Styles[cssClass] = props;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
svg.Element.style.prototype = new svg.Element.ElementBase;
|
|
|
|
// use element
|
|
svg.Element.use = function(node) {
|
|
this.base = svg.Element.RenderedElementBase;
|
|
this.base(node);
|
|
|
|
this.baseSetContext = this.setContext;
|
|
this.setContext = function(ctx) {
|
|
this.baseSetContext(ctx);
|
|
if (this.attribute('x').hasValue()) ctx.translate(this.attribute('x').Length.toPixels('x'), 0);
|
|
if (this.attribute('y').hasValue()) ctx.translate(0, this.attribute('y').Length.toPixels('y'));
|
|
}
|
|
|
|
this.renderChildren = function(ctx) {
|
|
var element = this.attribute('xlink:href').Definition.getDefinition();
|
|
if (element != null) element.render(ctx);
|
|
}
|
|
}
|
|
svg.Element.use.prototype = new svg.Element.RenderedElementBase;
|
|
|
|
// clip element
|
|
svg.Element.clipPath = function(node) {
|
|
this.base = svg.Element.ElementBase;
|
|
this.base(node);
|
|
|
|
this.apply = function(ctx) {
|
|
for (var i=0; i<this.children.length; i++) {
|
|
if (this.children[i].path) {
|
|
this.children[i].path(ctx);
|
|
ctx.clip();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
svg.Element.clipPath.prototype = new svg.Element.ElementBase;
|
|
|
|
// title element, do nothing
|
|
svg.Element.title = function(node) {
|
|
}
|
|
svg.Element.title.prototype = new svg.Element.ElementBase;
|
|
|
|
// desc element, do nothing
|
|
svg.Element.desc = function(node) {
|
|
}
|
|
svg.Element.desc.prototype = new svg.Element.ElementBase;
|
|
|
|
svg.Element.MISSING = function(node) {
|
|
console.log('ERROR: Element \'' + node.nodeName + '\' not yet implemented.');
|
|
}
|
|
svg.Element.MISSING.prototype = new svg.Element.ElementBase;
|
|
|
|
// element factory
|
|
svg.CreateElement = function(node) {
|
|
var className = 'svg.Element.' + node.nodeName.replace(/^[^:]+:/,'');
|
|
if (!eval(className)) className = 'svg.Element.MISSING';
|
|
|
|
var e = eval('new ' + className + '(node)');
|
|
e.type = node.nodeName;
|
|
return e;
|
|
}
|
|
|
|
// load from url
|
|
svg.load = function(ctx, url) {
|
|
svg.loadXml(ctx, svg.ajax(url));
|
|
}
|
|
|
|
// load from xml
|
|
svg.loadXml = function(ctx, xml) {
|
|
svg.init(ctx);
|
|
|
|
var dom = svg.parseXml(xml);
|
|
var e = svg.CreateElement(dom.documentElement);
|
|
|
|
// set canvas size
|
|
if (e.attribute('width').hasValue()) {
|
|
ctx.canvas.width = e.attribute('width').Length.toPixels(ctx.canvas.parentNode.clientWidth);
|
|
}
|
|
if (e.attribute('height').hasValue()) {
|
|
ctx.canvas.height = e.attribute('height').Length.toPixels(ctx.canvas.parentNode.clientHeight);
|
|
}
|
|
svg.ViewPort.SetCurrent(ctx.canvas.clientWidth, ctx.canvas.clientHeight);
|
|
|
|
// render loop
|
|
ctx.clearRect(0, 0, ctx.canvas.clientWidth, ctx.canvas.clientHeight);
|
|
e.render(ctx);
|
|
svg.intervalID = setInterval(function() {
|
|
// update animations
|
|
var needUpdate = false;
|
|
for (var i=0; i<svg.Animations.length; i++) {
|
|
needUpdate = needUpdate | svg.Animations[i].update(1000 / svg.FRAMERATE);
|
|
}
|
|
|
|
// render if needed
|
|
if (needUpdate) {
|
|
ctx.clearRect(0, 0, ctx.canvas.clientWidth, ctx.canvas.clientHeight);
|
|
e.render(ctx);
|
|
}
|
|
}, 1000 / svg.FRAMERATE);
|
|
}
|
|
|
|
svg.stop = function() {
|
|
if (svg.intervalID) {
|
|
clearInterval(svg.intervalID);
|
|
}
|
|
}
|
|
|
|
return svg;
|
|
}
|
|
})(); |