mglyph.js
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/* -*- Mode: Javascript; indent-tabs-mode:nil; js-indent-level: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/*************************************************************
*
* MathJax/jax/output/SVG/autoload/mglyph.js
*
* Implements the SVG output for <mglyph> elements.
*
* ---------------------------------------------------------------------
*
* Copyright (c) 2011-2014 The MathJax Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
MathJax.Hub.Register.StartupHook("SVG Jax Ready",function () {
var VERSION = "2.4.0";
var MML = MathJax.ElementJax.mml,
SVG = MathJax.OutputJax.SVG,
BBOX = SVG.BBOX,
LOCALE = MathJax.Localization;
var XLINKNS = "http://www.w3.org/1999/xlink";
BBOX.MGLYPH = BBOX.Subclass({
type: "image", removeable: false,
Init: function (img,w,h,align,mu,def) {
if (def == null) {def = {}}
var W = img.width*1000/SVG.em, H = img.height*1000/SVG.em;
var WW = W, HH = H, y = 0;
if (w !== "") {W = SVG.length2em(w,mu,WW); H = (WW ? W/WW * HH : 0)}
if (h !== "") {H = SVG.length2em(h,mu,HH); if (w === "") {W = (HH ? H/HH * WW : 0)}}
if (align !== "" && align.match(/\d/)) {y = SVG.length2em(align,mu); def.y = -y}
def.height = Math.floor(H); def.width = Math.floor(W);
def.transform = "translate(0,"+H+") matrix(1 0 0 -1 0 0)";
def.preserveAspectRatio = "none";
this.SUPER(arguments).Init.call(this,def);
this.element.setAttributeNS(XLINKNS,"href",img.src);
this.w = this.r = W; this.h = this.H = H + y;
this.d = this.D = -y; this.l = 0;
}
});
MML.mglyph.Augment({
toSVG: function (variant,scale) {
this.SVGgetStyles(); var svg = this.SVG(), img, err;
this.SVGhandleSpace(svg);
var values = this.getValues("src","width","height","valign","alt");
if (values.src === "") {
values = this.getValues("index","fontfamily");
if (values.index) {
if (!scale) {scale = this.SVGgetScale()}
var def = {}; if (values.fontfamily) {def["font-family"] = values.fontfamily}
svg.Add(BBOX.TEXT(scale,String.fromCharCode(values.index),def));
}
} else {
if (!this.img) {this.img = MML.mglyph.GLYPH[values.src]}
if (!this.img) {
this.img = MML.mglyph.GLYPH[values.src] = {img: new Image(), status: "pending"};
img = this.img.img;
img.onload = MathJax.Callback(["SVGimgLoaded",this]);
img.onerror = MathJax.Callback(["SVGimgError",this]);
img.src = values.src;
MathJax.Hub.RestartAfter(img.onload);
}
if (this.img.status !== "OK") {
err = MML.Error(
LOCALE._(["MathML","BadMglyph"],"Bad mglyph: %1",values.src),
{mathsize:"75%"});
this.Append(err); svg = err.toSVG(); this.data.pop();
} else {
var mu = this.SVGgetMu(svg);
svg.Add(BBOX.MGLYPH(this.img.img,values.width,values.height,values.valign,mu,
{src:values.src, alt:values.alt, title:values.alt}));
}
}
svg.Clean();
this.SVGhandleColor(svg);
this.SVGsaveData(svg);
return svg;
},
SVGimgLoaded: function (event,status) {
if (typeof(event) === "string") {status = event}
this.img.status = (status || "OK")
},
SVGimgError: function () {this.img.img.onload("error")}
},{
GLYPH: {} // global list of all loaded glyphs
});
MathJax.Hub.Startup.signal.Post("SVG mglyph Ready");
MathJax.Ajax.loadComplete(SVG.autoloadDir+"/mglyph.js");
});