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File:  [LON-CAPA] / loncom / html / adm / jsMath / extensions / moreArrows.js
Revision 1.2: download - view: text, annotated - select for diffs
Wed May 17 22:19:32 2006 UTC (18 years, 2 months ago) by albertel
Branches: MAIN
CVS tags: version_2_9_X, version_2_9_99_0, version_2_9_1, version_2_9_0, version_2_8_X, version_2_8_99_1, version_2_8_99_0, version_2_8_2, version_2_8_1, version_2_8_0, version_2_7_X, version_2_7_99_1, version_2_7_99_0, version_2_7_1, version_2_7_0, version_2_6_X, version_2_6_99_1, version_2_6_99_0, version_2_6_3, version_2_6_2, version_2_6_1, version_2_6_0, version_2_5_X, version_2_5_99_1, version_2_5_99_0, version_2_5_2, version_2_5_1, version_2_5_0, version_2_4_X, version_2_4_99_0, version_2_4_2, version_2_4_1, version_2_4_0, version_2_3_X, version_2_3_99_0, version_2_3_2, version_2_3_1, version_2_3_0, version_2_2_X, version_2_2_99_1, version_2_2_99_0, version_2_2_2, version_2_2_1, version_2_2_0, version_2_1_X, version_2_1_99_3, version_2_1_99_2, version_2_1_99_1, version_2_1_99_0, version_2_12_X, version_2_11_X, version_2_11_5, version_2_11_4_uiuc, version_2_11_4_msu, version_2_11_4, version_2_11_3_uiuc, version_2_11_3_msu, version_2_11_3, version_2_11_2_uiuc, version_2_11_2_msu, version_2_11_2_educog, version_2_11_2, version_2_11_1, version_2_11_0_RC3, version_2_11_0_RC2, version_2_11_0_RC1, version_2_11_0, version_2_10_X, version_2_10_1, version_2_10_0_RC2, version_2_10_0_RC1, version_2_10_0, loncapaMITrelate_1, language_hyphenation_merge, language_hyphenation, bz6209-base, bz6209, bz5969, bz2851, PRINT_INCOMPLETE_base, PRINT_INCOMPLETE, HEAD, GCI_3, GCI_2, GCI_1, BZ5971-printing-apage, BZ5434-fox, BZ4492-merge, BZ4492-feature_horizontal_radioresponse
- jsmath 3.3

    1: /*
    2:  *  extensions/moreArrows.js
    3:  *  
    4:  *  Part of the jsMath package for mathematics on the web.
    5:  *
    6:  *  This file implements additional arrow macros with under- and
    7:  *  overset labels.  It can be loaded by
    8:  *  
    9:  *    jsMath.Extension.Require('moreArrows');
   10:  *
   11:  *  or using \require{moreArrows} within a math formula.
   12:  *
   13:  *  ---------------------------------------------------------------------
   14:  *
   15:  *  Copyright 2005-2006 by Davide P. Cervone
   16:  * 
   17:  *  Licensed under the Apache License, Version 2.0 (the "License");
   18:  *  you may not use this file except in compliance with the License.
   19:  *  You may obtain a copy of the License at
   20:  * 
   21:  *      http://www.apache.org/licenses/LICENSE-2.0
   22:  * 
   23:  *  Unless required by applicable law or agreed to in writing, software
   24:  *  distributed under the License is distributed on an "AS IS" BASIS,
   25:  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   26:  *  See the License for the specific language governing permissions and
   27:  *  limitations under the License.
   28:  */
   29: 
   30: /********************************************************************/
   31: 
   32: jsMath.Extension.Require('leaders');
   33: 
   34: jsMath.Package(jsMath.Parser,{
   35: 
   36:   macros: {
   37:     xrightarrow:       ['HandleArrows','rightarrow'],
   38:     xleftarrow:        ['HandleArrows','leftarrow'],
   39:     xuprightharpoon:   ['HandleArrows','uprightharpoon'],
   40:     xupleftharpoon:    ['HandleArrows','upleftharpoon'],
   41:     xdownrightharpoon: ['HandleArrows','downrightharpoon'],
   42:     xdownleftharpoon:  ['HandleArrows','downleftharpoon']
   43:   },
   44:   
   45:   leaders: {
   46:     upleftharpoon:    {left: [1,0x28], rep:   [2,0x00]},
   47:     uprightharpoon:   {rep:  [2,0x00], right: [1,0x2A]},
   48:     downleftharpoon:  {left: [1,0x29], rep:   [2,0x00]},
   49:     downrightharpoon: {rep:  [2,0x00], right: [1,0x2B]}
   50:   },
   51: 
   52:   HandleArrows: function (name,data) {
   53:     var bot = this.GetBrackets(this.cmd+name); if (this.error) return;
   54:     var top = this.ProcessArg(this.cmd+name); if (this.error) return;
   55:     var box = jsMath.Box.Set(top,'S',this.mlist.data.size).Remeasured();
   56:     var w = box.w;
   57:     if (bot) {
   58:       bot = this.Process(bot); if (this.error) return;
   59:       var box = jsMath.Box.Set(bot,'S',this.mlist.data.size).Remeasured();
   60:       w = Math.max(w,box.w);
   61:     }
   62:     var leader = jsMath.Box.Leaders(w+.75,this.leaders[data[0]]);
   63:     box = jsMath.mItem.Atom('op',jsMath.Box.SetList([leader],'T',this.mlist.data.size));
   64:     box.limits = 1; box.sup = top; box.sub = bot;
   65:     this.mlist.Add(box);
   66:   }
   67: 
   68: });
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