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