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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/cancel.js
*
* Implements the \cancel, \bcancel, \xcancel, and \cancelto macros.
*
* Usage:
*
* \cancel{math} % strikeout math from lower left to upper right
* \bcancel{math} % strikeout from upper left to lower right
* \xcancel{math} % strikeout with an X
* \cancelto{value}{math} % strikeout with arrow going to value
*
* ---------------------------------------------------------------------
*
* Copyright (c) 2011-2020 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/cancel"] = {
version: "2.7.9",
//
// The attributes allowed in \enclose{notation}[attributes]{math}
//
ALLOWED: {
color: 1, mathcolor: 1,
background: 1, mathbackground: 1,
padding: 1,
thickness: 1
}
};
MathJax.Hub.Register.StartupHook("TeX Jax Ready",function () {
var TEX = MathJax.InputJax.TeX,
MML = MathJax.ElementJax.mml,
CANCEL = MathJax.Extension["TeX/cancel"];
CANCEL.setAttributes = function (def,attr) {
if (attr !== "") {
attr = attr.replace(/ /g,"").split(/,/);
for (var i = 0, m = attr.length; i < m; i++) {
var keyvalue = attr[i].split(/[:=]/);
if (CANCEL.ALLOWED[keyvalue[0]]) {
if (keyvalue[1] === "true") {keyvalue[1] = true}
if (keyvalue[1] === "false") {keyvalue[1] = false}
def[keyvalue[0]] = keyvalue[1];
}
}
}
return def;
};
//
// Set up macros
//
TEX.Definitions.Add({
macros: {
cancel: ['Cancel',MML.NOTATION.UPDIAGONALSTRIKE],
bcancel: ['Cancel',MML.NOTATION.DOWNDIAGONALSTRIKE],
xcancel: ['Cancel',MML.NOTATION.UPDIAGONALSTRIKE+" "+MML.NOTATION.DOWNDIAGONALSTRIKE],
cancelto: 'CancelTo'
}
},null,true);
TEX.Parse.Augment({
//
// Implement \cancel[attributes]{math},
// \bcancel[attributes]{math}, and
// \xcancel[attributes]{math}
//
Cancel: function(name,notation) {
var attr = this.GetBrackets(name,""), math = this.ParseArg(name);
var def = CANCEL.setAttributes({notation: notation},attr);
this.Push(MML.menclose(math).With(def));
},
//
// Implement \cancelto{value}[attributes]{math}
//
CancelTo: function(name,notation) {
var value = this.ParseArg(name),
attr = this.GetBrackets(name,""),
math = this.ParseArg(name);
var def = CANCEL.setAttributes({notation: MML.NOTATION.UPDIAGONALSTRIKE+" "+MML.NOTATION.UPDIAGONALARROW},attr);
value = MML.mpadded(value).With({depth:"-.1em",height:"+.1em",voffset:".1em"});
this.Push(MML.msup(MML.menclose(math).With(def),value));
}
});
MathJax.Hub.Startup.signal.Post("TeX cancel Ready");
});
MathJax.Ajax.loadComplete("[MathJax]/extensions/TeX/cancel.js");
// @license-end
|
