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// @license magnet:?xt=urn:btih:8e4f440f4c65981c5bf93c76d35135ba5064d8b7dn=apache-2.0.txt Apache-2.0
/* -*- Mode: Javascript; indent-tabs-mode:nil; js-indent-level: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/*************************************************************
*
* MathJax/extensions/TeX/mathchoice.js
*
* Implements the \mathchoice macro (rarely used)
*
* ---------------------------------------------------------------------
*
* Copyright (c) 2009-2020 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("TeX Jax Ready",function () {
var VERSION = "2.7.9";
var MML = MathJax.ElementJax.mml;
var TEX = MathJax.InputJax.TeX;
var TEXDEF = TEX.Definitions;
TEXDEF.Add({macros: {mathchoice: 'MathChoice'}},null,true);
TEX.Parse.Augment({
MathChoice: function (name) {
var D = this.ParseArg(name),
T = this.ParseArg(name),
S = this.ParseArg(name),
SS = this.ParseArg(name);
this.Push(MML.TeXmathchoice(D,T,S,SS));
}
});
MML.TeXmathchoice = MML.mbase.Subclass({
type: "TeXmathchoice", notParent: true,
choice: function () {
if (this.selection != null) return this.selection;
if (this.choosing) return 2; // prevent infinite loops: see issue #1151
this.choosing = true;
var selection = 0, values = this.getValues("displaystyle","scriptlevel");
if (values.scriptlevel > 0) {selection = Math.min(3,values.scriptlevel+1)}
else {selection = (values.displaystyle ? 0 : 1)}
// only cache the result if we are actually in place in a <math> tag.
var node = this.inherit; while (node && node.type !== "math") node = node.inherit;
if (node) this.selection = selection;
this.choosing = false;
return selection;
},
selected: function () {return this.data[this.choice()]},
setTeXclass: function (prev) {return this.selected().setTeXclass(prev)},
isSpacelike: function () {return this.selected().isSpacelike()},
isEmbellished: function () {return this.selected().isEmbellished()},
Core: function () {return this.selected()},
CoreMO: function () {return this.selected().CoreMO()},
toHTML: function (span) {
span = this.HTMLcreateSpan(span);
span.bbox = this.Core().toHTML(span).bbox;
// Firefox doesn't correctly handle a span with a negatively sized content,
// so move marginLeft to main span (this is a hack to get \iiiint to work).
// FIXME: This is a symptom of a more general problem with Firefox, and
// there probably needs to be a more general solution (e.g., modifying
// HTMLhandleSpace() to get the width and adjust the right margin to
// compensate for negative-width contents)
if (span.firstChild && span.firstChild.style.marginLeft) {
span.style.marginLeft = span.firstChild.style.marginLeft;
span.firstChild.style.marginLeft = "";
}
return span;
},
toSVG: function () {
var svg = this.Core().toSVG();
this.SVGsaveData(svg);
return svg;
},
toCommonHTML: function (node) {
node = this.CHTMLcreateNode(node);
this.CHTMLhandleStyle(node);
this.CHTMLhandleColor(node);
this.CHTMLaddChild(node,this.choice(),{});
return node;
},
toPreviewHTML: function(span) {
span = this.PHTMLcreateSpan(span);
this.PHTMLhandleStyle(span);
this.PHTMLhandleColor(span);
this.PHTMLaddChild(span,this.choice(),{});
return span;
}
});
MathJax.Hub.Startup.signal.Post("TeX mathchoice Ready");
});
MathJax.Ajax.loadComplete("[MathJax]/extensions/TeX/mathchoice.js");
// @license-end
|
