add superfish

public/javascripts/supersubs.js

@@ -0,0 +1,90 @@
+
+/*
+ * Supersubs v0.2b - jQuery plugin
+ * Copyright (c) 2008 Joel Birch
+ *
+ * Dual licensed under the MIT and GPL licenses:
+ * 	http://www.opensource.org/licenses/mit-license.php
+ * 	http://www.gnu.org/licenses/gpl.html
+ *
+ *
+ * This plugin automatically adjusts submenu widths of suckerfish-style menus to that of
+ * their longest list item children. If you use this, please expect bugs and report them
+ * to the jQuery Google Group with the word 'Superfish' in the subject line.
+ *
+ */
+
+;(function($){ // $ will refer to jQuery within this closure
+
+	$.fn.supersubs = function(options){
+		var opts = $.extend({}, $.fn.supersubs.defaults, options);
+		// return original object to support chaining
+		return this.each(function() {
+			// cache selections
+			var $$ = $(this);
+			// support metadata
+			var o = $.meta ? $.extend({}, opts, $$.data()) : opts;
+			// get the font size of menu.
+			// .css('fontSize') returns various results cross-browser, so measure an em dash instead
+			var fontsize = $('<li id="menu-fontsize">&#8212;</li>').css({
+				'padding' : 0,
+				'position' : 'absolute',
+				'top' : '-999em',
+				'width' : 'auto'
+			}).appendTo($$).width(); //clientWidth is faster, but was incorrect here
+			// remove em dash
+			$('#menu-fontsize').remove();
+			// cache all ul elements
+			$ULs = $$.find('ul');
+			// loop through each ul in menu
+			$ULs.each(function(i) {	
+				// cache this ul
+				var $ul = $ULs.eq(i);
+				// get all (li) children of this ul
+				var $LIs = $ul.children();
+				// get all anchor grand-children
+				var $As = $LIs.children('a');
+				// force content to one line and save current float property
+				var liFloat = $LIs.css('white-space','nowrap').css('float');
+				// remove width restrictions and floats so elements remain vertically stacked
+				var emWidth = $ul.add($LIs).add($As).css({
+					'float' : 'none',
+					'width'	: 'auto'
+				})
+				// this ul will now be shrink-wrapped to longest li due to position:absolute
+				// so save its width as ems. Clientwidth is 2 times faster than .width() - thanks Dan Switzer
+				.end().end()[0].clientWidth / fontsize;
+				// add more width to ensure lines don't turn over at certain sizes in various browsers
+				emWidth += o.extraWidth;
+				// restrict to at least minWidth and at most maxWidth
+				if (emWidth > o.maxWidth)		{ emWidth = o.maxWidth; }
+				else if (emWidth < o.minWidth)	{ emWidth = o.minWidth; }
+				emWidth += 'em';
+				// set ul to width in ems
+				$ul.css('width',emWidth);
+				// restore li floats to avoid IE bugs
+				// set li width to full width of this ul
+				// revert white-space to normal
+				$LIs.css({
+					'float' : liFloat,
+					'width' : '100%',
+					'white-space' : 'normal'
+				})
+				// update offset position of descendant ul to reflect new width of parent
+				.each(function(){
+					var $childUl = $('>ul',this);
+					var offsetDirection = $childUl.css('left')!==undefined ? 'left' : 'right';
+					$childUl.css(offsetDirection,emWidth);
+				});
+			});
+			
+		});
+	};
+	// expose defaults
+	$.fn.supersubs.defaults = {
+		minWidth		: 9,		// requires em unit.
+		maxWidth		: 25,		// requires em unit.
+		extraWidth		: 0			// extra width can ensure lines don't sometimes turn over due to slight browser differences in how they round-off values
+	};
+	
+})(jQuery); // plugin code ends