/**
 * jquery.LavaLamp v1.3.4b2 - light up your menu with fluid, jQuery powered animations.
 *
 * Requires jQuery v1.2.3 or better from http://jquery.com
 * Tested on jQuery 1.4, 1.3.2 and 1.2.6
 *
 * http://nixboxdesigns.com/projects/jquery-lavalamp/
 *
 * Copyright (c) 2008, 2009, 2010 Jolyon Terwilliger, jolyon@nixbox.com
 * Source code Copyright (c) 2008, 2009, 2010
 * Dual licensed under the MIT and GPL licenses:
 * http://www.opensource.org/licenses/mit-license.php
 * http://www.gnu.org/licenses/gpl.html
 *
 * credits to Guillermo Rauch and Ganeshji Marwaha (gmarwaha.com) for previous editions
 *
 * Version: 1.0 - adapted for jQuery 1.2.x series
 * Version: 1.1 - added linum parameter
 * Version: 1.2 - modified to support vertical resizing of elements
 * Version: 1.3 - enhanced automatic <li> item hi-lighting - will attempt to
 *					lock onto li > a element with href closest to selected
 *					window.location
 *			 	- click always returns 'true' by default, for standard link follow through.
 *
 * Version: 1.3.1 - verified for use with jQuery 1.3 - should still work with 1.2.x series
 *				- changed linum parameter to startItem for clarity
 *				- improved slide-in accuracy for .back elements with borders
 *				- changed .current class to .selectedLava for clarity and improved
 *					support
 *				- appended 'Lava' to all internal class names to avoid conflicts
 *				- fixed bug applying selectedLava class to elements with matching
 *					location.hash
 *				- now supports jquery.compat plugin for cross-library support
 *				- performance improvements
 *				- added new options:
 *				autoReturn: true - if set to false, hover will not return to last selected
 *									item upon list mouseout.
 *				returnDelay: 0 - if set, will delay auto-return feature specified # of
 *									milliseconds.
 *				setOnClick: true - if set to false, hover will return to default element
 *									regardless of click event.
 *				homeLeft: 0, homeTop: 0 - if either set to non zero value, absolute
 *									positioned li element with class .homeLava is 
 *									prepended to list for homing feature.
 *				homeWidth: 0, homeHeight: 0 - if set, are used for creation of li.homeLava
 *									element.
 *				returnHome: false - if set along with homeLeft or homeTop, lavalamp hover
 *									will always return to li.home after click.
 *
 * Version: 1.3.2 - fixed: stray $ references inside the plugin to work with
 *					jQuery.noConflict() properly - thanks Colin.
 *
 * Version: 1.3.3 - fixed: added closure with null passed argument for move() command in
 * 					returnDelay to fix errors some were seeing - thanks to Michel and 
 *					Richard for noticing this.
 *
 *					fixed: changed mouseover/out events to mouseenter/leave to fix jerky
 *					animation problem when using excessive margins instead of padding.  
 *					Thanks to Thomas for the solution and Chris for demonstrating the problem.
 *					* requires jQuery 1.3 or better
 *
 *					enhanced: added 'noLava' class detection to prevent LavaLamp effect
 *					application to LI elements with this class. This feature allows you to
 *					create submenus - for details, see examples at
 *					http://nixboxdesigns.com/demos/jquery-lavalamp-demos.html
 *
 *					enhanced: modified to better automatically find default location for 
 *					relative links. Thanks to Harold for testing and finding this bug.
 *
 * Version: 1.3.4 - major overhaul on practically everything:
 *					enhanced: added target and autoResize options - see below.
 *					enhanced: better automatic default item selection and URI resolution,
 *					better support for returnHome and returnDelay, refined internal variable
 *					usage and test to be as lean as possible
 *					fixed: backLava hover element now exactly covers the destination LI dimensions.
 *					fixed: changed use of mouseleave/mouseenter to bind events so will work with
 *							jQuery 1.2.2 onward.
 *					enhanced: behaves more like a plugin should and now automatically adds proper
 * 							position CSS tags to the backLava element and parent container
 *							if absent. 
 *
 * Examples and usage:
 *
 * The HTML markup used to build the menu can be as simple as...
 *
 *       <ul class="lavaLamp">
 *           <li><a href="#">Phone Home</a></li>
 *           <li><a href="#">Make Contact</a></li>
 *           <li><a href="#">Board Ship</a></li>
 *           <li><a href="#">Fly to Venus</a></li>
 *       </ul>
 *
 * Additional Styles must be added to make the LavaLamp perform properly, to wit:
 *
 * <style>
 * ul.lavaLamp {
 *   padding:5px;  // use some minimal padding to account for sloppy mouse movements
 * }
 * ul.lavaLamp li.backLava {
 *   z-index:3;   // must be less than z-index of A tags within the LI elements
 * }
 * ul.lavaLamp li a {
 *  display:block;  // helps with positioning the link within the LI element
 *  z-index:10;     // or must be higher than li.backLava z-index
 * }
 * </style>
 *
 * Once you have included the basic styles above, you will need to include 
 * the jQuery library, easing plugin (optional) and the this LavaLamp plugin.
 *
 * jQuery Easing Library 1.3 available here:  http://plugins.jquery.com/project/Easing
 * 
 * Example LavaLamp initializing statement:
 * $(function() { $("ul.lavaLamp").lavaLamp({ fx: "easeOutBack", speed: 700}) });
 * finds all UL elements in the document with the class of 'lavaLamp' and attaches the 
 * LavaLamp plugin using an easing library fx of OutBack and an animate speed of 
 * 700 milliseconds or 7/10ths of a second.
 *
 *
 * List of Parameters
 *
 * @param target - default: 'li' 
 * valid selector for target elements to receive hover effect
 *
 * Example:
 * jQuery("div#article").lavaLamp({ target:'p' });
 * assigns all p elements under div#article to receive lavaLamp hover events
 *
 * @param fx - default: 'swing'
 * selects the easing formula for the animation - requires the jQuery Easing library 
 * to be loaded for additional effects
 * 
 * Example:
 * jQuery("ul.lavaLamp").lavaLamp({ fx: "easeOutElastic" });
 * animates the backLava element using the OutElastic formula
 * 
 * @param speed - default: 500
 * sets animation speed in milliseconds
 * 
 * Example:
 * jQuery("ul.lavaLamp").lavaLamp({ speed: 1000 });
 * sets the animation speed to one second.
 * 
 * @param click - default: function() { return true; }
 * Callback to be executed when the menu item is clicked. The 'event' object and source target
 * DOM element will be passed in as arguments so you can use them in your function.
 * 
 * Example:
 * jQuery("ul.lavaLamp").lavaLamp({ click: function(event, menuItem) {
 *		alert(event+el);
 *		return false;
 * } });
 *
 * causes the browser to display an alert message of the variables passed and 
 * return false aborts any other click events on child items, including not 
 * following any links contained within the target
 *
 * @param startItem - default: 'no'
 * specifies the number target element as default, starting with 0 for the first element
 * Used to manually set the default lavaLamp hi-light on load.
 *
 * Example:
 * jQuery("ul.lavaLamp").lavaLamp({ startItem: 2 });
 * selects the third element in the list as default location for backLava
 *
 * @param autoReturn - default: true
 * defines whether the backLava hover should return to the last selectedLava element
 * upon mouseleave.
 *
 * Example:
 * jQuery("ul.lavaLamp").lavaLamp({ autoReturn: false });
 * turns off the autoReturn feature - backLava element will stay on the last element
 * that you hovered over.
 *
 * @param returnDelay - default: 0
 * how many milliseconds to wait before returning the backLava element to the last
 * selected element.  Only works if autoReturn is set to true (default setting)
 *
 * Example:
 * jQuery("ul.lavaLamp").lavaLamp({ returnDelay: 1000 });
 * waits one second after mouseleave event before returning to the last selected
 * element.
 *
 * @param setOnClick - default: true
 * defines whether a clicked element should receive the selectLava class and become the
 * most recently selected element
 *
 * Example:
 * jQuery("ul.lavaLamp").lavaLamp({ setOnClick:false });
 * disables selecting of elements once clicked - after you leave the parent list element
 * the backLava will return to the original default element the page was loaded with.
 *
 * @param homeTop - default: 0
 * @param homeLeft - default: 0
 * @param homeHeight - default: 0
 * @param homeWidth - default: 0
 * allows you to define an independent 'home' element where the backLava defaults to or can
 * be sent to. This can be used to define a unique starting and/or resting place for the 
 * backLava upon leaving the parent element.
 *
 * Example:
 * jQuery("ul.lavaLamp").lavaLamp({ homeTop:-100, homeLeft:0, homeHeight:20, homeWidth:600 });
 * creates a home element 100 pixels above the parent container with a height of 20px and
 * width of 600px.  If the parent element has CSS of overflow:hidden, this can provide
 * an interesting fly-in effect
 *
 * @param returnHome - default:false
 * adjusts behavior of the backLava element when the mouse leaves the parent container. 
 * the default behavior of 'false' causes the backLava element to stay on the active menu 
 * items after it is first triggered. this feature respects the returnDelay parameter, if set.
 * this feature overrides the autoReturn parameter.
 *
 * Example:
 * jQuery("ul.lavaLamp").lavaLamp({ returnHome:true });
 * causes the backLava element to always return to the homeLava position after 
 * mouse leaves the parent container.  this can be manually triggered by running 
 * the command jQuery("ul.lavaLamp").mouseover();
 *
 * @param autoResize - default:false
 * triggers the selectedLava mouseenter event when the window is resized 
 * setting autoResize to true causes the backLava element to reposition and change dimensions
 * if the resizing the screen changes the shape of the lavaLamp.  Best used with the
 * target option. Default is false for efficiency as this feature is new and seldom used.
 *
 * Example:
 * jQuery('div#articles').lavaLamp({target:'p',autoSize:true});
 * causes the backLava element to resize and reposition to the p.selectedLava position 
 * and dimensions when the window resizes.
 *
 */

//console.log();
(function(jQuery) {
jQuery.fn.lavaLamp = function(o) {
	o = jQuery.extend({
				target: 'li', 
				fx: 'swing',
				speed: 500, 
				click: function(){return true}, 
				startItem: '',
				autoReturn: true,
				returnDelay: 0,
				setOnClick: true,
				homeTop:0,
				homeLeft:0,
				homeWidth:0,
				homeHeight:0,
				returnHome:false,
				autoResize:false
				}, 
			o || {});

	// parseInt for easy mathing
	function getInt(arg) {
		var myint = parseInt(arg);
		return (isNaN(myint)? 0: myint);
	}

	if (o.autoResize)
		jQuery(window).resize(function(){
			jQuery(o.target+'.selectedLava').trigger('mouseenter');
		});

	return this.each(function() {
		// ensures parent UL or OL element has some positioning
		if (jQuery(this).css('position')=='static')
			jQuery(this).css('position','relative');

		// create homeLava element if origin dimensions set
		if (o.homeTop || o.homeLeft) { 
			var $home = jQuery('<'+o.target+' class="homeLava"></'+o.target+'>').css({ left:o.homeLeft, top:o.homeTop, width:o.homeWidth, height:o.homeHeight, position:'absolute' });
			jQuery(this).prepend($home);
		}

		var path = location.pathname + location.search + location.hash, $selected, $back, $lt = jQuery(o.target+'[class!=noLava]', this), delayTimer, bx=0, by=0;

		// start $selected default with CSS class 'selectedLava'
		$selected = jQuery(o.target+'.selectedLava', this);
		
		// override $selected if startItem is set
		if (o.startItem != '')
			$selected = $lt.eq(o.startItem);

		// default to $home element
		if ((o.homeTop || o.homeLeft) && $selected.length<1)
			$selected = $home;

		// loop through all the target element a href tags and
		// the longest href to match the location path is deemed the most 
		// accurate and selected as default
		if ($selected.length<1) {
			var pathmatch_len=0, $pathel;
	
			$lt.each(function(){ 
				var thishref = $('a:first',this).attr('href');
				//console.log(thishref+' size:'+thishref.length);
				if (path.indexOf(thishref)>-1 && thishref.length > pathmatch_len )
				{
					$pathel = $(this);
					pathmatch_len = thishref.length;
				}
	
			});
			if (pathmatch_len>0) {
				//console.log('found match:'+$('a:first',$pathel).attr('href'));
				$selected = $pathel;
			}
			//else 
				//console.log('no match!');
		}
	
		// if still no matches, default to the first element
		if ( $selected.length<1 )
			$selected = $lt.eq(0);

		// make sure we only have one element as $selected and apply selectedLava class
		$selected = jQuery($selected.eq(0).addClass('selectedLava'));
			
		// add mouseover event for every sub element
		$lt.bind('mouseenter', function() {
			//console.log('mouseenter');
			// help backLava behave if returnDelay is set
			if(delayTimer) {clearTimeout(delayTimer);delayTimer=null;}
			move(jQuery(this));
		}).click(function(e) {
			if (o.setOnClick) {
				$selected.removeClass('selectedLava');
				$selected = jQuery(this).addClass('selectedLava');
			}
			return o.click.apply(this, [e, this]);
		});
		
		// creates and adds to the container a backLava element with absolute positioning
		$back = jQuery('<li class="backLava"><div class="leftLava"></div><div class="bottomLava"></div><div class="cornerLava"></div></li>').css('position','absolute').prependTo(this);

		// setting css height and width actually sets the innerHeight and innerWidth, so
		// compute border and padding differences on styled backLava element to fit them in also.
		bx = getInt($back.css('borderLeftWidth'))+getInt($back.css('borderRightWidth'))+getInt($back.css('paddingLeft'))+getInt($back.css('paddingRight'));
		by = getInt($back.css('borderTopWidth'))+getInt($back.css('borderBottomWidth'))+getInt($back.css('paddingTop'))+getInt($back.css('paddingBottom'));

		// set the starting position for the lavalamp hover element: .back
		if (o.homeTop || o.homeLeft)
			$back.css({ left:o.homeLeft, top:o.homeTop, width:o.homeWidth, height:o.homeHeight });
		else
		{
			$back.css({ left: $selected.position().left, top: $selected.position().top, width: $selected.outerWidth()-bx, height: $selected.outerHeight()-by }); 
		}

		// after we leave the container element, move back to default/last clicked element
		jQuery(this).bind('mouseleave', function() {
			//console.log('mouseleave');
			var $returnEl = null;
			if (o.returnHome)
				$returnEl = $home;
			else if (!o.autoReturn)
				return true;
		
			if (o.returnDelay) {
				if(delayTimer) clearTimeout(delayTimer);
				delayTimer = setTimeout(function(){move($returnEl);},o.returnDelay);
			}
			else {
				move($returnEl);
			}
			return true;
		});

		function move($el) {
			if (!$el) $el = $selected;

			$back.stop()
			.animate({
				left: $el.position().left,
				top: $el.position().top,
				width: $el.outerWidth()-bx,
				height: $el.outerHeight()-by
			}, o.speed, o.fx);
		};
	});
	
};
})(jQuery);