92 lines
3.6 KiB
JavaScript
92 lines
3.6 KiB
JavaScript
/*
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* Supposition v0.2 - an optional enhancer for Superfish jQuery menu widget.
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*
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* Copyright (c) 2008 Joel Birch - based mostly on work by Jesse Klaasse and credit goes largely to him.
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* Special thanks to Karl Swedberg for valuable input.
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*
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* Dual licensed under the MIT and GPL licenses:
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* http://www.opensource.org/licenses/mit-license.php
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* http://www.gnu.org/licenses/gpl.html
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*/
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/*
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* This is not the original jQuery Supposition plugin.
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* Please refer to the README for more information.
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*/
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(function($){
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$.fn.supposition = function(){
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var $w = $(window), /*do this once instead of every onBeforeShow call*/
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_offset = function(dir) {
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return window[dir == 'y' ? 'pageYOffset' : 'pageXOffset']
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|| document.documentElement && document.documentElement[dir=='y' ? 'scrollTop' : 'scrollLeft']
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|| document.body[dir=='y' ? 'scrollTop' : 'scrollLeft'];
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},
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onHide = function(){
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this.css({bottom:''});
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},
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onBeforeShow = function(){
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this.each(function(){
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var $u = $(this);
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$u.css('display','block');
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var $mul = $u.closest('.sf-menu'),
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level = $u.parents('ul').length,
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menuWidth = $u.width(),
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menuParentWidth = $u.closest('li').outerWidth(true),
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menuParentLeft = $u.closest('li').offset().left,
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totalRight = $w.width() + _offset('x'),
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menuRight = $u.offset().left + menuWidth,
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exactMenuWidth = (menuRight > (menuParentWidth + menuParentLeft)) ? menuWidth - (menuRight - (menuParentWidth + menuParentLeft)) : menuWidth;
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if ($u.parents('.sf-js-enabled').hasClass('rtl')) {
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if (menuParentLeft < exactMenuWidth) {
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if (($mul.hasClass('sf-horizontal') && level == 1) || ($mul.hasClass('sf-navbar') && level == 2)){
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$u.css({left:0,right:'auto'});
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}
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else {
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$u.css({left:menuParentWidth + 'px',right:'auto'});
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}
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}
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}
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else {
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if (menuRight > totalRight && menuParentLeft > menuWidth) {
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if (($mul.hasClass('sf-horizontal') && level == 1) || ($mul.hasClass('sf-navbar') && level == 2)){
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$u.css({right:0,left:'auto'});
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}
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else {
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$u.css({right:menuParentWidth + 'px',left:'auto'});
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}
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}
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}
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var windowHeight = $w.height(),
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offsetTop = $u.offset().top,
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menuParentShadow = ($mul.hasClass('sf-shadow') && $u.css('padding-bottom').length > 0) ? parseInt($u.css('padding-bottom').slice(0,-2)) : 0,
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menuParentHeight = ($mul.hasClass('sf-vertical')) ? '-' + menuParentShadow : $u.parent().outerHeight(true) - menuParentShadow,
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menuHeight = $u.height(),
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baseline = windowHeight + _offset('y');
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var expandUp = ((offsetTop + menuHeight > baseline) && (offsetTop > menuHeight));
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if (expandUp) {
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$u.css({bottom:menuParentHeight + 'px',top:'auto'});
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}
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$u.css('display','none');
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});
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};
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return this.each(function() {
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var o = $.fn.superfish.o[this.serial]; /* get this menu's options */
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/* if callbacks already set, store them */
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var _onBeforeShow = o.onBeforeShow,
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_onHide = o.onHide;
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$.extend($.fn.superfish.o[this.serial],{
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onBeforeShow: function() {
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onBeforeShow.call(this); /* fire our Supposition callback */
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_onBeforeShow.call(this); /* fire stored callbacks */
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},
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onHide: function() {
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onHide.call(this); /* fire our Supposition callback */
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_onHide.call(this); /* fire stored callbacks */
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}
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});
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});
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};
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})(jQuery); |