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Annotation of loncom/html/adm/jsMath/extensions/fbox.js, revision 1.1

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;
        !            40:     if (!c) {c = 'black'};
        !            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)+'; '
        !            47:              + 'border: 1px solid '+c+';" />';
        !            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: });