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95 lines
3.8 KiB
95 lines
3.8 KiB
/* -*- Mode: Javascript; indent-tabs-mode:nil; js-indent-level: 2 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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/*************************************************************
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*
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* MathJax/jax/output/CommonHTML/autoload/mglyph.js
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*
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* Implements the CommonHTML output for <mglyph> elements.
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*
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* ---------------------------------------------------------------------
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*
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* Copyright (c) 2015-2018 The MathJax Consortium
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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MathJax.Hub.Register.StartupHook("CommonHTML Jax Ready",function () {
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var VERSION = "2.7.5";
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var MML = MathJax.ElementJax.mml,
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CHTML = MathJax.OutputJax.CommonHTML,
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LOCALE = MathJax.Localization;
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MML.mglyph.Augment({
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toCommonHTML: function (node,options) {
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var values = this.getValues("src","width","height","valign","alt");
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node = this.CHTMLcreateNode(node);
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this.CHTMLhandleStyle(node);
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this.CHTMLhandleScale(node);
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if (values.src === "") {
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var index = this.Get("index");
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this.CHTMLgetVariant();
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if (index && this.CHTMLvariant.style)
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this.CHTMLhandleText(node,String.fromCharCode(index),this.CHTMLvariant);
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} else {
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var bbox = this.CHTML;
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if (!bbox.img) bbox.img = MML.mglyph.GLYPH[values.src];
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if (!bbox.img) {
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bbox.img = MML.mglyph.GLYPH[values.src] = {img: new Image(), status: "pending"};
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bbox.img.img.onload = MathJax.Callback(["CHTMLimgLoaded",this]);
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bbox.img.img.onerror = MathJax.Callback(["CHTMLimgError",this]);
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bbox.img.img.src = values.src;
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MathJax.Hub.RestartAfter(bbox.img.img.onload);
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}
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if (bbox.img.status !== "OK") {
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var err = MML.Error(LOCALE._(["MathML","BadMglyph"],"Bad mglyph: %1",values.src));
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err.data[0].data[0].mathsize = "75%";
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this.Append(err); err.toCommonHTML(node); this.data.pop();
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bbox.combine(err.CHTML,0,0,1);
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} else {
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var img = CHTML.addElement(node,"img",{
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isMathJax:true, src:values.src, alt:values.alt, title:values.alt
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});
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var w = values.width, h = values.height;
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var W = bbox.img.img.width/CHTML.em, H = bbox.img.img.height/CHTML.em;
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var WW = W, HH = H;
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if (w !== "") {W = this.CHTMLlength2em(w,WW); H = (WW ? W/WW * HH : 0)}
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if (h !== "") {H = this.CHTMLlength2em(h,HH); if (w === "") W = (HH ? H/HH * WW : 0)}
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img.style.width = CHTML.Em(W); bbox.w = bbox.r = W;
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img.style.height = CHTML.Em(H); bbox.h = bbox.t = H;
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if (values.valign) {
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bbox.d = bbox.b = -this.CHTMLlength2em(values.valign,HH);
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img.style.verticalAlign = CHTML.Em(-bbox.d);
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bbox.h -= bbox.d; bbox.t = bbox.h;
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}
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}
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}
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this.CHTMLhandleSpace(node);
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this.CHTMLhandleBBox(node);
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this.CHTMLhandleColor(node);
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return node;
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},
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CHTMLimgLoaded: function (event,status) {
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if (typeof(event) === "string") status = event;
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this.CHTML.img.status = (status || "OK");
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},
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CHTMLimgError: function () {this.CHTML.img.img.onload("error")}
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},{
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GLYPH: {} // global list of all loaded glyphs
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});
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MathJax.Hub.Startup.signal.Post("CommonHTML mglyph Ready");
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MathJax.Ajax.loadComplete(CHTML.autoloadDir+"/mglyph.js");
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});
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