www

Unnamed repository; edit this file 'description' to name the repository.
Log | Files | Refs | README | LICENSE

extpfeil.js (3333B)

      1 /* -*- Mode: Javascript; indent-tabs-mode:nil; js-indent-level: 2 -*- */
      2 /* vim: set ts=2 et sw=2 tw=80: */
      3 
      4 /*************************************************************
      5  *
      6  *  MathJax/extensions/TeX/extpfeil.js
      7  *  
      8  *  Implements additional stretchy arrow macros.
      9  *
     10  *  ---------------------------------------------------------------------
     11  *  
     12  *  Copyright (c) 2011-2015 The MathJax Consortium
     13  * 
     14  *  Licensed under the Apache License, Version 2.0 (the "License");
     15  *  you may not use this file except in compliance with the License.
     16  *  You may obtain a copy of the License at
     17  * 
     18  *      http://www.apache.org/licenses/LICENSE-2.0
     19  * 
     20  *  Unless required by applicable law or agreed to in writing, software
     21  *  distributed under the License is distributed on an "AS IS" BASIS,
     22  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     23  *  See the License for the specific language governing permissions and
     24  *  limitations under the License.
     25  */
     26 
     27 MathJax.Extension["TeX/extpfeil"] = {
     28   version: "2.6.0"
     29 };
     30 
     31 MathJax.Hub.Register.StartupHook("TeX Jax Ready",function () {
     32   
     33   var TEX = MathJax.InputJax.TeX,
     34       TEXDEF = TEX.Definitions;
     35   
     36   //
     37   //  Define the arrows to load the AMSmath extension
     38   //  (since they need its xArrow method)
     39   // 
     40   TEXDEF.Add({
     41     macros: {
     42       xtwoheadrightarrow: ['Extension','AMSmath'],
     43       xtwoheadleftarrow:  ['Extension','AMSmath'],
     44       xmapsto:            ['Extension','AMSmath'],
     45       xlongequal:         ['Extension','AMSmath'],
     46       xtofrom:            ['Extension','AMSmath'],
     47       Newextarrow:        ['Extension','AMSmath']
     48     }
     49   },null,true);
     50   
     51   //
     52   //  Redefine the macros when AMSmath is loaded
     53   //
     54   MathJax.Hub.Register.StartupHook("TeX AMSmath Ready",function () {
     55     MathJax.Hub.Insert(TEXDEF,{
     56       macros: {
     57         xtwoheadrightarrow: ['xArrow',0x21A0,12,16],
     58         xtwoheadleftarrow:  ['xArrow',0x219E,17,13],
     59         xmapsto:            ['xArrow',0x21A6,6,7],
     60         xlongequal:         ['xArrow',0x003D,7,7],
     61         xtofrom:            ['xArrow',0x21C4,12,12],
     62         Newextarrow:        'NewExtArrow'
     63       }
     64     });
     65   });
     66 
     67   //
     68   //  Implements \Newextarrow to define a new arrow (not compatible with \newextarrow, but
     69   //  the equivalent for MathJax)
     70   //
     71   TEX.Parse.Augment({
     72     NewExtArrow: function (name) {
     73       var cs    = this.GetArgument(name),
     74           space = this.GetArgument(name),
     75           chr   = this.GetArgument(name);
     76       if (!cs.match(/^\\([a-z]+|.)$/i)) {
     77         TEX.Error(["NewextarrowArg1",
     78                    "First argument to %1 must be a control sequence name",name]);
     79       }
     80       if (!space.match(/^(\d+),(\d+)$/)) {
     81         TEX.Error(
     82           ["NewextarrowArg2",
     83            "Second argument to %1 must be two integers separated by a comma",
     84            name]
     85         );
     86       }
     87       if (!chr.match(/^(\d+|0x[0-9A-F]+)$/i)) {
     88         TEX.Error(
     89           ["NewextarrowArg3",
     90            "Third argument to %1 must be a unicode character number",
     91            name]
     92         );
     93       }
     94       cs = cs.substr(1); space = space.split(","); chr = parseInt(chr);
     95       TEXDEF.macros[cs] = ['xArrow',chr,parseInt(space[0]),parseInt(space[1])];
     96     }
     97   });
     98   
     99   MathJax.Hub.Startup.signal.Post("TeX extpfeil Ready");
    100 });
    101 
    102 MathJax.Ajax.loadComplete("[MathJax]/extensions/TeX/extpfeil.js");