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Annotation of loncom/html/adm/jsMath/extensions/fbox.js, revision 1.2

1.1       albertel    1: /*
                      2:  *  extensions/fbox.js
                      3:  *  
                      4:  *  Part of the jsMath package for mathematics on the web.
                      5:  *
                      6:  *  This file implements the \fbox macro.  It will be loaded
                      7:  *  automatically when needed, or can be loaded by
                      8:  *  
                      9:  *    jsMath.Extension.Require('fbox');
                     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.HTML,{
                     31: 
                     32:   /*
                     33:    *  Create a colored frame
                     34:    */
                     35:   Frame: function (x,y,w,h,c,pos) {
                     36: 
                     37:     h -= 2/jsMath.em; // use 2 pixels to compensate for border size
                     38:     w -= 2/jsMath.em;
                     39:     y -= 1/jsMath.em;
1.2     ! albertel   40:     if (!c) {c = ''} else {c = ' '+c};
1.1       albertel   41:     if (pos) {pos = 'absolute;'} else
                     42:              {pos = 'relative; margin-right: '+this.Em(-(w+2/jsMath.em))+'; '}
                     43:     return '<img src="'+jsMath.blank+'" style="position:' + pos
                     44:              + 'vertical-align: '+this.Em(y)+'; left: '+this.Em(x)+'; '
                     45:              + 'width:' +this.Em(w*jsMath.Browser.imgScale)+'; '
                     46:              + 'height:'+this.Em(h*jsMath.Browser.imgScale)+'; '
1.2     ! albertel   47:              + 'border: 1px solid'+c+';" />';
1.1       albertel   48:   }
                     49: 
                     50: });
                     51: 
                     52: jsMath.Package(jsMath.Parser,{
                     53:   
                     54:   macros: {fbox: 'FBox'},
                     55:   
                     56:   /*
                     57:    *  Implement \fbox{...}
                     58:    */
                     59:   FBox: function (name) {
                     60:     var text = this.GetArgument(this.cmd+name); if (this.error) return;
                     61:     var arg = jsMath.Box.InternalMath(text,this.mlist.data.size);
                     62:     var f = 0.25 * jsMath.sizes[this.mlist.data.size]/100;
                     63:     var box = jsMath.Box.Set(arg,this.mlist.data.style,this.mlist.data.size,1).Remeasured();
                     64:     var frame = jsMath.HTML.Frame(-f,-box.d-f,box.w+2*f,box.h+box.d+2*f);
                     65:     box.html = frame + box.html + jsMath.HTML.Spacer(f);
                     66:     box.h += f; box.d += f; box.w +=2*f; box.x += f;
                     67:     box.bh = Math.max(box.bh,box.h); box.bd = Math.max(box.bd,box.d);
                     68:     this.mlist.Add(jsMath.mItem.Atom('ord',box));
                     69:   }
                     70:   
                     71: });