2 * extensions/mathchoice.js
4 * Part of the jsMath package for mathematics on the web.
6 * This file implements the 4-way math choice. It will be loaded
7 * automatically when needed, or can be loaded by
9 * jsMath.Extension.Require('mathchoice');
11 * ---------------------------------------------------------------------
13 * Copyright 2005-2006 by Davide P. Cervone
15 * Licensed under the Apache License, Version 2.0 (the "License");
16 * you may not use this file except in compliance with the License.
17 * You may obtain a copy of the License at
19 * http://www.apache.org/licenses/LICENSE-2.0
21 * Unless required by applicable law or agreed to in writing, software
22 * distributed under the License is distributed on an "AS IS" BASIS,
23 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
24 * See the License for the specific language governing permissions and
25 * limitations under the License.
28 /********************************************************************/
30 jsMath.Add(jsMath.mList.prototype.Atomize,{
33 * Handle a 4-way choice atom. (Rule 4)
35 choice: function (style,mitem,i,mlist) {
36 if (style.charAt(style.length-1) == "'") {style = style.slice(0,style.length-1)}
37 var nlist = []; var M = mitem[style];
38 if (!M) {M = {type: 'mlist', mlist: {mlist: []}}}
39 if (M.type == 'mlist') {
41 for (var k = 0; k < i; k++) {nlist[k] = mlist[k]}
42 for (k = 0; k < M.length; k++) {nlist[i+k] = M[k]}
43 for (k = i+1; k < mlist.length; k++) {nlist[nlist.length] = mlist[k]}
46 mlist[i] = jsMath.mItem.Atom('ord',M);
53 jsMath.Package(jsMath.Parser,{
55 macros: {mathchoice: 'MathChoice'},
58 * Implements \mathchoice{}{}{}{}
60 MathChoice: function (name) {
61 var D = this.ProcessArg(this.cmd+name); if (this.error) return;
62 var T = this.ProcessArg(this.cmd+name); if (this.error) return;
63 var S = this.ProcessArg(this.cmd+name); if (this.error) return;
64 var SS = this.ProcessArg(this.cmd+name); if (this.error) return;
65 var box = new jsMath.mItem('choice',{D: D, T: T, S: S, SS: SS});
66 this.mlist.Add(new jsMath.mItem('choice',{D: D, T: T, S: S, SS: SS}));