111 lines
3.6 KiB
JavaScript
111 lines
3.6 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/cancel.js
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*
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* Implements the \cancel, \bcancel, \xcancel, and \cancelto macros.
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*
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* Usage:
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*
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* \cancel{math} % strikeout math from lower left to upper right
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* \bcancel{math} % strikeout from upper left to lower right
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* \xcancel{math} % strikeout with an X
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* \cancelto{value}{math} % strikeout with arrow going to value
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*
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* ---------------------------------------------------------------------
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*
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* Copyright (c) 2011-2013 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.Extension["TeX/cancel"] = {
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version: "2.3",
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//
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// The attributes allowed in \enclose{notation}[attributes]{math}
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//
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ALLOWED: {
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color: 1, mathcolor: 1,
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background: 1, mathbackground: 1,
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padding: 1,
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thickness: 1
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}
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};
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MathJax.Hub.Register.StartupHook("TeX Jax Ready",function () {
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var TEX = MathJax.InputJax.TeX,
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MML = MathJax.ElementJax.mml,
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CANCEL = MathJax.Extension["TeX/cancel"];
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CANCEL.setAttributes = function (def,attr) {
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if (attr !== "") {
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attr = attr.replace(/ /g,"").split(/,/);
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for (var i = 0, m = attr.length; i < m; i++) {
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var keyvalue = attr[i].split(/[:=]/);
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if (CANCEL.ALLOWED[keyvalue[0]]) {
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if (keyvalue[1] === "true") {keyvalue[1] = true}
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if (keyvalue[1] === "false") {keyvalue[1] = false}
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def[keyvalue[0]] = keyvalue[1];
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}
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}
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}
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return def;
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};
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//
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// Set up macros
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//
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TEX.Definitions.Add({
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macros: {
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cancel: ['Cancel',MML.NOTATION.UPDIAGONALSTRIKE],
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bcancel: ['Cancel',MML.NOTATION.DOWNDIAGONALSTRIKE],
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xcancel: ['Cancel',MML.NOTATION.UPDIAGONALSTRIKE+" "+MML.NOTATION.DOWNDIAGONALSTRIKE],
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cancelto: 'CancelTo'
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}
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},null,true);
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TEX.Parse.Augment({
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//
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// Implement \cancel[attributes]{math},
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// \bcancel[attributes]{math}, and
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// \xcancel[attributes]{math}
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//
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Cancel: function(name,notation) {
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var attr = this.GetBrackets(name,""), math = this.ParseArg(name);
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var def = CANCEL.setAttributes({notation: notation},attr);
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this.Push(MML.menclose(math).With(def));
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},
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//
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// Implement \cancelto{value}[attributes]{math}
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//
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CancelTo: function(name,notation) {
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var value = this.ParseArg(name),
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attr = this.GetBrackets(name,""),
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math = this.ParseArg(name);
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var def = CANCEL.setAttributes({notation: MML.NOTATION.UPDIAGONALSTRIKE+" "+MML.NOTATION.UPDIAGONALARROW},attr);
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value = MML.mpadded(value).With({depth:"-.1em",height:"+.1em",voffset:".1em"});
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this.Push(MML.msup(MML.menclose(math).With(def),value));
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}
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});
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MathJax.Hub.Startup.signal.Post("TeX cancel Ready");
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});
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MathJax.Ajax.loadComplete("[MathJax]/extensions/TeX/cancel.js");
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