71 lines
2.3 KiB
JavaScript
Executable File
71 lines
2.3 KiB
JavaScript
Executable File
/*
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* extensions/mathchoice.js
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*
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* Part of the jsMath package for mathematics on the web.
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*
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* This file implements the 4-way math choice. It will be loaded
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* automatically when needed, or can be loaded by
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*
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* jsMath.Extension.Require('mathchoice');
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*
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* ---------------------------------------------------------------------
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*
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* Copyright 2005-2006 by Davide P. Cervone
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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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/********************************************************************/
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jsMath.Add(jsMath.mList.prototype.Atomize,{
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/*
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* Handle a 4-way choice atom. (Rule 4)
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*/
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choice: function (style,mitem,i,mlist) {
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if (style.charAt(style.length-1) == "'") {style = style.slice(0,style.length-1)}
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var nlist = []; var M = mitem[style];
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if (!M) {M = {type: 'mlist', mlist: {mlist: []}}}
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if (M.type == 'mlist') {
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M = M.mlist.mlist;
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for (var k = 0; k < i; k++) {nlist[k] = mlist[k]}
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for (k = 0; k < M.length; k++) {nlist[i+k] = M[k]}
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for (k = i+1; k < mlist.length; k++) {nlist[nlist.length] = mlist[k]}
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return nlist;
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} else {
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mlist[i] = jsMath.mItem.Atom('ord',M);
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return mlist;
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}
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}
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});
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jsMath.Package(jsMath.Parser,{
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macros: {mathchoice: 'MathChoice'},
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/*
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* Implements \mathchoice{}{}{}{}
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*/
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MathChoice: function (name) {
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var D = this.ProcessArg(this.cmd+name); if (this.error) return;
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var T = this.ProcessArg(this.cmd+name); if (this.error) return;
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var S = this.ProcessArg(this.cmd+name); if (this.error) return;
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var SS = this.ProcessArg(this.cmd+name); if (this.error) return;
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var box = new jsMath.mItem('choice',{D: D, T: T, S: S, SS: SS});
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this.mlist.Add(new jsMath.mItem('choice',{D: D, T: T, S: S, SS: SS}));
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}
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});
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