/* $Id: supersubs.js,v 1.1 2010/02/12 12:53:13 mehrpadin Exp $ */
/*
* 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 = $('
').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