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/*
* Supposition v0.2 - an optional enhancer for Superfish jQuery menu widget.
*
* Copyright (c) 2008 Joel Birch - based mostly on work by Jesse Klaasse and credit goes largely to him.
* Special thanks to Karl Swedberg for valuable input.
*
* Dual licensed under the MIT and GPL licenses:
* http://www.opensource.org/licenses/mit-license.php
* http://www.gnu.org/licenses/gpl.html
*/
/*
* This is not the original jQuery Supersubs plugin.
* Please refer to the README for more information.
*/
(function($){
$.fn.supposition = function(){
var $w = $(window), /*do this once instead of every onBeforeShow call*/
_offset = function(dir) {
return window[dir == 'y' ? 'pageYOffset' : 'pageXOffset']
|| document.documentElement && document.documentElement[dir=='y' ? 'scrollTop' : 'scrollLeft']
|| document.body[dir=='y' ? 'scrollTop' : 'scrollLeft'];
},
onHide = function(){
this.css({bottom:''});
},
onBeforeShow = function(){
this.each(function(){
var $u = $(this);
$u.css('display','block');
var menuWidth = $u.width(),
menuParentWidth = $u.closest('li').outerWidth(true),
menuParentLeft = $u.closest('li').offset().left,
totalRight = $w.width() + _offset('x'),
menuRight = $u.offset().left + menuWidth,
exactMenuWidth = (menuRight > (menuParentWidth + menuParentLeft)) ? menuWidth - (menuRight - (menuParentWidth + menuParentLeft)) : menuWidth;
if ($u.parents('.sf-js-enabled').hasClass('rtl')) {
if (menuParentLeft < exactMenuWidth) {
$u.css('left', menuParentWidth + 'px');
$u.css('right', 'auto');
}
}
else {
if (menuRight > totalRight && menuParentLeft > menuWidth) {
$u.css('right', menuParentWidth + 'px');
$u.css('left', 'auto');
}
}
var windowHeight = $w.height(),
offsetTop = $u.offset().top,
menuParentShadow = ($u.closest('.sf-menu').hasClass('sf-shadow') && $u.css('padding-bottom').length > 0) ? parseInt($u.css('padding-bottom').slice(0,-2)) : 0,
menuParentHeight = ($u.closest('.sf-menu').hasClass('sf-vertical')) ? '-' + menuParentShadow : $u.parent().outerHeight(true) - menuParentShadow,
menuHeight = $u.height(),
baseline = windowHeight + _offset('y');
var expandUp = ((offsetTop + menuHeight > baseline) && (offsetTop > menuHeight));
if (expandUp) {
$u.css('bottom', menuParentHeight + 'px');
$u.css('top', 'auto');
}
$u.css('display','none');
});
};
return this.each(function() {
var o = $.fn.superfish.o[this.serial]; /* get this menu's options */
/* if callbacks already set, store them */
var _onBeforeShow = o.onBeforeShow,
_onHide = o.onHide;
$.extend($.fn.superfish.o[this.serial],{
onBeforeShow: function() {
onBeforeShow.call(this); /* fire our Supposition callback */
_onBeforeShow.call(this); /* fire stored callbacks */
},
onHide: function() {
onHide.call(this); /* fire our Supposition callback */
_onHide.call(this); /* fire stored callbacks */
}
});
});
};
})(jQuery);