90 lines
3.3 KiB
JavaScript
90 lines
3.3 KiB
JavaScript
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/* -*- 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/extensions/TeX/mathchoice.js
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*
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* Implements the \mathchoice macro (rarely used)
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*
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* ---------------------------------------------------------------------
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*
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* Copyright (c) 2009-2013 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("TeX Jax Ready",function () {
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var VERSION = "2.3";
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var MML = MathJax.ElementJax.mml;
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var TEX = MathJax.InputJax.TeX;
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var TEXDEF = TEX.Definitions;
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TEXDEF.Add({macros: {mathchoice: 'MathChoice'}},null,true);
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TEX.Parse.Augment({
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MathChoice: function (name) {
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var D = this.ParseArg(name),
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T = this.ParseArg(name),
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S = this.ParseArg(name),
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SS = this.ParseArg(name);
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this.Push(MML.TeXmathchoice(D,T,S,SS));
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}
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});
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MML.TeXmathchoice = MML.mbase.Subclass({
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type: "TeXmathchoice", notParent: true,
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choice: function () {
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if (this.selection == null) {
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this.selection = 0;
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var values = this.getValues("displaystyle","scriptlevel");
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if (values.scriptlevel > 0) {this.selection = Math.min(3,values.scriptlevel+1)}
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else {this.selection = (values.displaystyle ? 0 : 1)}
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}
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return this.selection;
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},
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selected: function () {return this.data[this.choice()]},
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setTeXclass: function (prev) {return this.selected().setTeXclass(prev)},
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isSpacelike: function () {return this.selected().isSpacelike()},
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isEmbellished: function () {return this.selected().isEmbellished()},
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Core: function () {return this.selected()},
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CoreMO: function () {return this.selected().CoreMO()},
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toHTML: function (span) {
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span = this.HTMLcreateSpan(span);
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span.bbox = this.Core().toHTML(span).bbox;
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// Firefox doesn't correctly handle a span with a negatively sized content,
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// so move marginLeft to main span (this is a hack to get \iiiint to work).
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// FIXME: This is a symptom of a more general problem with Firefox, and
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// there probably needs to be a more general solution (e.g., modifying
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// HTMLhandleSpace() to get the width and adjust the right margin to
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// compensate for negative-width contents)
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if (span.firstChild && span.firstChild.style.marginLeft) {
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span.style.marginLeft = span.firstChild.style.marginLeft;
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span.firstChild.style.marginLeft = "";
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}
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return span;
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},
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toSVG: function () {
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var svg = this.Core().toSVG();
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this.SVGsaveData(svg);
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return svg;
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}
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});
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MathJax.Hub.Startup.signal.Post("TeX mathchoice Ready");
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});
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MathJax.Ajax.loadComplete("[MathJax]/extensions/TeX/mathchoice.js");
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