From 3cff9c1c05e572c0e98c02ffa1aa6c3d2fc4dcf5 Mon Sep 17 00:00:00 2001
From: short <>
Date: Thu, 15 Sep 2005 03:25:34 +0000
Subject: [PATCH] Provide CSS inheritance hack.  - How it should be done for
 CSS officially?

---
 css_inherit.js | 109 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 109 insertions(+)
 create mode 100644 css_inherit.js

diff --git a/css_inherit.js b/css_inherit.js
new file mode 100644
index 0000000..4afea32
--- /dev/null
+++ b/css_inherit.js
@@ -0,0 +1,109 @@
+/* $Id$
+ * JavaScript helper for CSS 'subroutines'.
+ * Copyright (C) 2005 Jan Kratochvil <project-www.jankratochvil.net@jankratochvil.net>
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; exactly version 2 of June 1991 is required
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+
+// Required CSS rule syntax: .PARENTNAME XXX[-lace-inherit="CHILDNAME"] { }
+// Be aware: CSS is case insensitive but HTML/XHTML is (sometimes?) sensitive.
+// Be aware: Works only on CSS directly applied by the "class" attribute!
+// TODO: Warns on invalid inheritance rules.
+
+var map;
+
+function map_set(from,to)
+{
+	if (!map)
+		map=new Array();
+	if (!map[from])
+		map[from]=new Array();
+	if (map[from][to])
+		return true;
+	map[from][to]=true;
+	return false;
+}
+
+function css_inherit_node(node)
+{
+	if (node.className) {
+		var classone_re=node.className.toLowerCase().match(/(\S+)/g);
+		for (var classonei in classone_re) {
+			var classone=classone_re[classonei];
+			if (!map || !map[classone])
+				continue;
+			for (var target in map[classone])
+				node.className+=" "+target;
+			}
+		}
+	for (node=node.firstChild;node!=null;node=node.nextSibling)
+		css_inherit_node(node);
+}
+
+function css_inherit()
+{
+	if (document.styleSheets)
+		for (var stylei in document.styleSheets) {
+			var style=document.styleSheets[stylei];
+			if (!style.cssRules)
+				continue;
+			for (var rulei in style.cssRules) {
+				var rule=style.cssRules[rulei];
+				if (!rule.selectorText)
+					continue;
+				var re;
+				if (!(re=rule.selectorText.toLowerCase()
+						.match(/^\s*[.](\w+).*\[\s*-lace-inherit\s*=\s*"?([^"]*)"?\s*\]\s*/)))
+					continue;
+				var from_string=re[1];
+				var to_string=re[2];
+				var to_re=to_string.match(/\S+/g);
+				for (var to_rei in to_re) {
+					var to_item=to_re[to_rei];
+					map_set(from_string,to_item);
+					}
+				}
+			}
+	var change;
+	do {
+		change=false;
+		for (var from in map)
+			for (var to in map[from]) {
+				if (!map[to])
+					continue;
+				for (var filler in map[to])
+					if (!map_set(from,filler))
+						change=true;
+				}
+		} while (change);
+	/* Gecko: document.createNodeIterator(...)==NS_ERROR_NOT_IMPLEMENTED */
+	css_inherit_node(document);
+}
+
+/* Origin: http://simon.incutio.com/archive/2004/05/26/addLoadEvent */
+function addLoadEvent(func)
+{
+	var onload_orig=window.onload;
+	if (typeof(onload_orig)!='function')
+		window.onload = func;
+	else
+		window.onload = function()
+		{
+			onload_orig();
+			func();
+		};
+}
+
+addLoadEvent(css_inherit);
-- 
1.8.3.1