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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/CommonHTML/autoload/mglyph.js
- *
- * Implements the CommonHTML output for <mglyph> elements.
- *
- * ---------------------------------------------------------------------
- *
- * Copyright (c) 2015-2017 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("CommonHTML Jax Ready",function () {
- var VERSION = "2.7.2";
- var MML = MathJax.ElementJax.mml,
- CHTML = MathJax.OutputJax.CommonHTML,
- LOCALE = MathJax.Localization;
-
- MML.mglyph.Augment({
- toCommonHTML: function (node,options) {
- var values = this.getValues("src","width","height","valign","alt");
- node = this.CHTMLcreateNode(node);
- this.CHTMLhandleStyle(node);
- this.CHTMLhandleScale(node);
- if (values.src === "") {
- var index = this.Get("index");
- this.CHTMLgetVariant();
- if (index && this.CHTMLvariant.style)
- this.CHTMLhandleText(node,String.fromCharCode(index),this.CHTMLvariant);
- } else {
- var bbox = this.CHTML;
- if (!bbox.img) bbox.img = MML.mglyph.GLYPH[values.src];
- if (!bbox.img) {
- bbox.img = MML.mglyph.GLYPH[values.src] = {img: new Image(), status: "pending"};
- bbox.img.img.onload = MathJax.Callback(["CHTMLimgLoaded",this]);
- bbox.img.img.onerror = MathJax.Callback(["CHTMLimgError",this]);
- bbox.img.img.src = values.src;
- MathJax.Hub.RestartAfter(bbox.img.img.onload);
- }
- if (bbox.img.status !== "OK") {
- var err = MML.Error(LOCALE._(["MathML","BadMglyph"],"Bad mglyph: %1",values.src));
- err.data[0].data[0].mathsize = "75%";
- this.Append(err); err.toCommonHTML(node); this.data.pop();
- bbox.combine(err.CHTML,0,0,1);
- } else {
- var img = CHTML.addElement(node,"img",{
- isMathJax:true, src:values.src, alt:values.alt, title:values.alt
- });
- var w = values.width, h = values.height;
- var W = bbox.img.img.width/CHTML.em, H = bbox.img.img.height/CHTML.em;
- var WW = W, HH = H;
- if (w !== "") {W = this.CHTMLlength2em(w,WW); H = (WW ? W/WW * HH : 0)}
- if (h !== "") {H = this.CHTMLlength2em(h,HH); if (w === "") W = (HH ? H/HH * WW : 0)}
- img.style.width = CHTML.Em(W); bbox.w = bbox.r = W;
- img.style.height = CHTML.Em(H); bbox.h = bbox.t = H;
- if (values.valign) {
- bbox.d = bbox.b = -this.CHTMLlength2em(values.valign,HH);
- img.style.verticalAlign = CHTML.Em(-bbox.d);
- bbox.h -= bbox.d; bbox.t = bbox.h;
- }
- }
- }
- this.CHTMLhandleSpace(node);
- this.CHTMLhandleBBox(node);
- this.CHTMLhandleColor(node);
- return node;
- },
- CHTMLimgLoaded: function (event,status) {
- if (typeof(event) === "string") status = event;
- this.CHTML.img.status = (status || "OK");
- },
- CHTMLimgError: function () {this.CHTML.img.img.onload("error")}
- },{
- GLYPH: {} // global list of all loaded glyphs
- });
-
- MathJax.Hub.Startup.signal.Post("CommonHTML mglyph Ready");
- MathJax.Ajax.loadComplete(CHTML.autoloadDir+"/mglyph.js");
- });
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