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| Current File : /home1/savoy/www/savoyeducation.com/Backup23-11-16/backup/assets/js/menu/supersubs.js |
/*
* Supersubs v0.3b - jQuery plugin
* Copyright (c) 2013 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;
// cache all ul elements and show them in preparation for measurements
$ULs = $$.find('ul').show();
// get the font size of menu.
// .css('fontSize') returns various results cross-browser, so measure an em dash instead
var fontsize = $('<li id="menu-fontsize">—</li>').css({
'padding' : 0,
'position' : 'absolute',
'top' : '-999em',
'width' : 'auto'
}).appendTo($$)[0].clientWidth; //clientWidth is faster than .width()
// remove em dash
$('#menu-fontsize').remove();
// loop through each ul in menu
$ULs.each(function(i) {
// cache this ul
var $ul = $(this);
// 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
$ul.add($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.
var emWidth = $ul[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.
// set it to 100% in case it isn't already set to this in the CSS
.each(function(){
var $childUl = $(this).children('ul');
var offsetDirection = $childUl.css('left') !== undefined ? 'left' : 'right';
$childUl.css(offsetDirection,'100%');
});
}).hide();
});
};
// 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