Annotation of loncom/html/adm/jsMath/extensions/moreArrows.js, revision 1.1
1.1 ! albertel 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.Script.Start();
! 33:
! 34: jsMath.Extension.Require('leaders');
! 35:
! 36: jsMath.Package(jsMath.Parser,{
! 37:
! 38: macros: {
! 39: xrightarrow: ['HandleArrows','rightarrow'],
! 40: xleftarrow: ['HandleArrows','leftarrow'],
! 41: xuprightharpoon: ['HandleArrows','uprightharpoon'],
! 42: xupleftharpoon: ['HandleArrows','upleftharpoon'],
! 43: xdownrightharpoon: ['HandleArrows','downrightharpoon'],
! 44: xdownleftharpoon: ['HandleArrows','downleftharpoon']
! 45: },
! 46:
! 47: leaders: {
! 48: upleftharpoon: {left: [1,0x28], rep: [2,0x00]},
! 49: uprightharpoon: {rep: [2,0x00], right: [1,0x2A]},
! 50: downleftharpoon: {left: [1,0x29], rep: [2,0x00]},
! 51: downrightharpoon: {rep: [2,0x00], right: [1,0x2B]}
! 52: },
! 53:
! 54: HandleArrows: function (name,data) {
! 55: var bot = this.GetBrackets(this.cmd+name); if (this.error) return;
! 56: var top = this.ProcessArg(this.cmd+name); if (this.error) return;
! 57: var box = jsMath.Box.Set(top,'S',this.mlist.data.size).Remeasured();
! 58: var w = box.w;
! 59: if (bot) {
! 60: bot = this.Process(bot); if (this.error) return;
! 61: var box = jsMath.Box.Set(bot,'S',this.mlist.data.size).Remeasured();
! 62: w = Math.max(w,box.w);
! 63: }
! 64: var leader = jsMath.Box.Leaders(w+.75,this.leaders[data[0]]);
! 65: box = jsMath.mItem.Atom('op',jsMath.Box.SetList([leader],'T',this.mlist.data.size));
! 66: box.limits = 1; box.sup = top; box.sub = bot;
! 67: this.mlist.Add(box);
! 68: }
! 69:
! 70: });
! 71:
! 72: jsMath.Script.End();
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>