/**

 * jquery.LavaLamp - light up your menu with fluid, jQuery powered animations.

 *

 * Requires jQuery v1.2.3 or better from http://jquery.com

 * Tested on jQuery 1.2.6 and 1.3.2

 *

 * http://nixboxdesigns.com/projects/jquery-lavalamp.php

 *

 * Copyright (c) 2008, 2009, 2010 Jolyon Terwilliger, jolyon@nixbox.com

 * Source code Copyright (c) 2007, 2008

 * 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: 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 LI

 * 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 LI

 *

 * @param startItem - default: 'no'

 * specifies the number LI 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 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();

 *

 *

 */



//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

                }, 

            o || {});



    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=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);



        // compute border and padding differences on styled backLava element

        bx = parseInt($back.css('borderLeftWidth').match(/\d+/))+parseInt($back.css('borderRightWidth').match(/\d+/))+parseInt($back.css('paddingLeft').match(/\d+/))+parseInt($back.css('paddingRight').match(/\d+/));

        by = parseInt($back.css('borderTopWidth').match(/\d+/))+parseInt($back.css('borderBottomWidth').match(/\d+/))+parseInt($back.css('paddingTop').match(/\d+/))+parseInt($back.css('paddingBottom').match(/\d+/));

        //console.log("bx="+bx+", by="+by);



        // 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);