Annotation of loncom/html/adm/jsMath/extensions/mathchoice.js, revision 1.1
1.1 ! albertel 1: /*
! 2: * extensions/mathchoice.js
! 3: *
! 4: * Part of the jsMath package for mathematics on the web.
! 5: *
! 6: * This file implements the 4-way math choice. It will be loaded
! 7: * automatically when needed, or can be loaded by
! 8: *
! 9: * jsMath.Extension.Require('mathchoice');
! 10: *
! 11: * ---------------------------------------------------------------------
! 12: *
! 13: * Copyright 2005-2006 by Davide P. Cervone
! 14: *
! 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
! 18: *
! 19: * http://www.apache.org/licenses/LICENSE-2.0
! 20: *
! 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.
! 26: */
! 27:
! 28: /********************************************************************/
! 29:
! 30: jsMath.Add(jsMath.mList.prototype.Atomize,{
! 31:
! 32: /*
! 33: * Handle a 4-way choice atom. (Rule 4)
! 34: */
! 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]; if (!M) {M = {type: 'mlist', mlist: []}}
! 38: if (M.type == 'mlist') {
! 39: M = M.mlist.mlist;
! 40: for (var k = 0; k < i; k++) {nlist[k] = mlist[k]}
! 41: for (k = 0; k < M.length; k++) {nlist[i+k] = M[k]}
! 42: for (k = i+1; k < mlist.length; k++) {nlist[nlist.length] = mlist[k]}
! 43: return nlist;
! 44: } else {
! 45: mlist[i] = jsMath.mItem.Atom('ord',M);
! 46: return mlist;
! 47: }
! 48: }
! 49:
! 50: });
! 51:
! 52: jsMath.Package(jsMath.Parser,{
! 53:
! 54: macros: {mathchoice: 'MathChoice'},
! 55:
! 56: /*
! 57: * Implements \mathchoice{}{}{}{}
! 58: */
! 59: MathChoice: function (name) {
! 60: var D = this.ProcessArg(this.cmd+name); if (this.error) return;
! 61: var T = this.ProcessArg(this.cmd+name); if (this.error) return;
! 62: var S = this.ProcessArg(this.cmd+name); if (this.error) return;
! 63: var SS = this.ProcessArg(this.cmd+name); if (this.error) return;
! 64: var box = new jsMath.mItem('choice',{D: D, T: T, S: S, SS: SS});
! 65: this.mlist.Add(new jsMath.mItem('choice',{D: D, T: T, S: S, SS: SS}));
! 66: }
! 67:
! 68: });
! 69:
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