--- /dev/null
+/*
+ * 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));
+ }
+});