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// @license magnet:?xt=urn:btih:8e4f440f4c65981c5bf93c76d35135ba5064d8b7&dn=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/AMScd.js
*
* Implements the CD environment for commutative diagrams.
*
* ---------------------------------------------------------------------
*
* Copyright (c) 2013-2020 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.Extension["TeX/AMScd"] = {
version: "2.7.9",
config: MathJax.Hub.CombineConfig("TeX.CD",{
colspace: "5pt",
rowspace: "5pt",
harrowsize: "2.75em",
varrowsize: "1.75em",
hideHorizontalLabels: false
})
};
MathJax.Hub.Register.StartupHook("TeX Jax Ready",function () {
var MML = MathJax.ElementJax.mml,
TEX = MathJax.InputJax.TeX,
STACKITEM = TEX.Stack.Item,
TEXDEF = TEX.Definitions,
CONFIG = MathJax.Extension["TeX/AMScd"].config;
TEXDEF.environment.CD = "CD_env";
TEXDEF.special["@"] = "CD_arrow";
TEXDEF.macros.minCDarrowwidth = "CD_minwidth";
TEXDEF.macros.minCDarrowheight = "CD_minheight";
TEX.Parse.Augment({
//
// Implements \begin{CD}...\end{CD}
//
CD_env: function (begin) {
this.Push(begin);
return STACKITEM.array().With({
arraydef: {
columnalign: "center",
columnspacing: CONFIG.colspace,
rowspacing: CONFIG.rowspace,
displaystyle: true
},
minw: this.stack.env.CD_minw || CONFIG.harrowsize,
minh: this.stack.env.CD_minh || CONFIG.varrowsize
});
},
CD_arrow: function (name) {
var c = this.string.charAt(this.i);
if (!c.match(/[><VA.|=]/)) {return this.Other(name)} else {this.i++}
var top = this.stack.Top();
if (!top.isa(STACKITEM.array) || top.data.length) {
this.CD_cell(name);
top = this.stack.Top();
}
//
// Add enough cells to place the arrow correctly
//
var arrowRow = ((top.table.length % 2) === 1);
var n = (top.row.length + (arrowRow ? 0 : 1)) % 2;
while (n) {this.CD_cell(name); n--}
var mml;
var hdef = {minsize: top.minw, stretchy:true},
vdef = {minsize: top.minh, stretchy:true, symmetric:true, lspace:0, rspace:0};
if (c === ".") {}
else if (c === "|") {mml = this.mmlToken(MML.mo("\u2225").With(vdef))}
else if (c === "=") {mml = this.mmlToken(MML.mo("=").With(hdef))}
else {
//
// for @>>> @<<< @VVV and @AAA, get the arrow and labels
//
var arrow = {">":"\u2192", "<":"\u2190", V:"\u2193", A:"\u2191"}[c];
var a = this.GetUpTo(name+c,c),
b = this.GetUpTo(name+c,c);
if (c === ">" || c === "<") {
//
// Lay out horizontal arrows with munderover if it has labels
//
mml = MML.mo(arrow).With(hdef);
if (!a) {a = "\\kern "+top.minw} // minsize needs work
if (a || b) {
var pad = {width:"+11mu", lspace:"6mu"};
mml = MML.munderover(this.mmlToken(mml));
if (a) {
a = TEX.Parse(a,this.stack.env).mml();
mml.SetData(mml.over,MML.mpadded(a).With(pad).With({voffset:".1em"}));
}
if (b) {
b = TEX.Parse(b,this.stack.env).mml();
mml.SetData(mml.under,MML.mpadded(b).With(pad));
}
if (CONFIG.hideHorizontalLabels)
{mml = MML.mpadded(mml).With({depth:0, height:".67em"})}
}
} else {
//
// Lay out vertical arrows with mrow if there are labels
//
mml = arrow = this.mmlToken(MML.mo(arrow).With(vdef));
if (a || b) {
mml = MML.mrow();
if (a) {mml.Append(TEX.Parse("\\scriptstyle\\llap{"+a+"}",this.stack.env).mml())}
mml.Append(arrow.With({texClass: MML.TEXCLASS.ORD}));
if (b) {mml.Append(TEX.Parse("\\scriptstyle\\rlap{"+b+"}",this.stack.env).mml())}
}
}
}
if (mml) {this.Push(mml)};
this.CD_cell(name);
},
CD_cell: function (name) {
var top = this.stack.Top();
if ((top.table||[]).length % 2 === 0 && (top.row||[]).length === 0) {
//
// Add a strut to the first cell in even rows to get
// better spacing of arrow rows.
//
this.Push(MML.mpadded().With({height:"8.5pt",depth:"2pt"}));
}
this.Push(STACKITEM.cell().With({isEntry:true, name:name}));
},
CD_minwidth: function (name) {
this.stack.env.CD_minw = this.GetDimen(name);
},
CD_minheight: function (name) {
this.stack.env.CD_minh = this.GetDimen(name);
}
});
});
MathJax.Ajax.loadComplete("[MathJax]/extensions/TeX/AMScd.js");
// @license-end
|
