-/*
- * extensions/bbox.js
- *
- * Part of the jsMath package for mathematics on the web.
- *
- * This file implements the \bbox macro, which creates an HTML box that
- * can be styled (for background colors, and so on). You can include
- * an optional dimension that tells how much extra padding to include
- * around the bounding box for the mathematics. E.g.,
- *
- * \bbox[2pt]{x+y} % an invisible box around x+y with 2pt of extra space
- * \bbox[green]{x+y} % a green box around x+y
- * \bbox[green,2pt]{x+y} % a green box with 2pt of extra space
- * \bbox[yellow,2pt,border:1px solid red]{x+y}
- * % a yellow box with a red border and 2pt space
- *
- * This extension is loaded automatically when needed, or you can call
- * it directly via
- *
- * jsMath.Extension.Require('bbox');
- *
- * ---------------------------------------------------------------------
- *
- * Copyright 2006 by Davide P. Cervone
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-/********************************************************************/
-
-jsMath.Add(jsMath.HTML,{
-
- /*
- * Create a colored bbounding box
- */
- BBox: function (w,h,d,c,s) {
- if (w <= 0) {return ''}
- if (d == null) {d = 0}
- var style = (jsMath.Browser.msieInlineBlockFix ? '' : 'overflow:visible;');
- style += 'width:'+this.Em(w)+'; height:'+this.Em(h+d)+';';
- if (jsMath.Browser.mozInlineBlockBug) {d = -h}
- if (jsMath.Browser.msieInlineBlockFix) {d -= jsMath.d}
- if (d) {style += ' vertical-align:'+this.Em(-d)+';'}
- if (c) {style += ' background-color:'+c+';'}
- var html = '<span class="blank" style="'+style+s+'"></span>';
- return html;
- }
-
-});
-
-jsMath.Add(jsMath.mList.prototype.Atomize,{
- /*
- * Creates the box HTML
- */
- bbox: function (style,size,mitem,prev,mlist) {
- var box; var w; var h; var d;
- var nuc = mitem.nuc = jsMath.Box.Set(mitem.nuc,style,size).Remeasured();
- if (box == null) {w = nuc.w; h = nuc.h; d = nuc.d} // values before super/subs-cript
- var nuc = mitem.nuc; nuc.Styled(); var pad = mitem.pad;
- if (pad) {w += 2*pad; h += pad; d += pad; nuc.w += pad}
- if (jsMath.Browser.msieCenterBugFix)
- {nuc.html = '<span style="position:relative">'+nuc.html+'</span>'}
- nuc.html =
- jsMath.HTML.BBox(w,h,d,mitem.color,mitem.style) +
- jsMath.HTML.Spacer(pad-w) +
- nuc.html;
- nuc.Remeasured();
- if (pad && nuc.w < w) {
- nuc.html += jsMath.HTML.Spacer(w-nuc.w);
- nuc.w = w;
- }
- nuc.h = Math.max(nuc.h,h); nuc.d = Math.max(nuc.d,d);
- nuc.bh = Math.max(nuc.bh,nuc.h); nuc.bd = Math.max(nuc.bd,nuc.d);
- mitem.type = 'ord';
- jsMath.mList.prototype.Atomize.SupSub(style,size,mitem);
- }
-});
-
-jsMath.Package(jsMath.Parser,{
-
- macros: {bbox: 'BBox'},
-
- /*
- * Implement \bbox[...]{...}
- */
- BBox: function (name) {
- var extra = this.GetBrackets(this.cmd+name); if (this.error) return;
- var arg = this.GetArgument(this.cmd+name); if (this.error) return;
- var nuc = this.Process(arg); if (this.error) return;
- var color; var pad = 0; var style = '';
- if (extra != '') {
- var parts = extra.split(/,/);
- for (var i in parts) {
- if (parts[i].match(/^\s*([-+]?(\.\d+|\d+(\.\d*)?))(pt|em|ex|mu|px)\s*$/))
- {pad = this.ParseDimen(parts[i],'',0,1)}
- else if (parts[i].match(/:/)) {style = parts[i]}
- else {color = parts[i]}
- }
- }
- var atom = {nuc: nuc, atom: 1, pad: pad, color: color, style: style};
- this.mlist.Add(new jsMath.mItem('bbox',atom));
- }
-});