/**

 * HoverAccordion - jQuery plugin for intuitively opening accordions and menus

 * http://berndmatzner.de/jquery/hoveraccordion/

 * Copyright (c) 2008 Bernd Matzner

 * Dual licensed under the MIT and GPL licenses:

 * http://www.opensource.org/licenses/mit-license.php

 * http://www.gnu.org/licenses/gpl.html

 * Requires jQuery 1.2.1 or higher

 * Version: 0.5.0

 *

 * Usage:

 * $('#YourUnorderedListID').hoverAccordion();

 * or

 * $('.YourUnorderedListClass').hoverAccordion({

 *  speed: 'slow',

 *  activateitem: '1',

 *  active: 'current',

 *  header: 'title',

 *  hover: 'highlight',

 *  opened: 'arrowdown',

 *  closed: 'arrowup'

 *  keepheight: 'true'

 * });

 */

(function($){

    $.fn.hoverAccordion = function(options){

        // Setup options

        options = jQuery.extend({

            speed: 'fast', // Speed at which the subitems open up - valid options are: slow, normal, fast

            activateitem: 'true', // 'true': Automatically activate items with links corresponding to the current page, '2': Activate item #2

            active: 'active', // Class name of the initially active element

            header: 'header', // Class name for header items

            hover: 'hover', // Class name for hover effect

            opened: 'opened', // Class name for open header items

            closed: 'closed', // Class name for closed header items

            keepheight: 'false' // 'true': Set the height of each accordion item to the size of the largest one, 'false': Leave height as is

        }, options);

        

        // Current hover status

        var thislist = this;

        

        // Current URL

        var thisurl = window.location.href;

        

        // Interval for detecting intended element activation

        var i = 0;

        

        // Change display status of subitems when hovering

        function doHover(obj){

            if ($(obj).html() == undefined) 

                obj = this;

            

            // Change only one display status at a time

            if (!thislist.is(':animated')) {

                var newelem = $(obj).parent().children('ul');

                var oldelem = $(obj).parent().parent().children('li').children('ul:visible');

                if (options.keepheight == 'true') {

                    thisheight = maxheight;

                }

                else {

                    thisheight = newelem.height();

                }

                

                // Change display status if not already open

                if (!newelem.is(':visible')) {

                    newelem.children().hide();

                    newelem.animate({

                        height: thisheight

                    }, {

                        step: function(n, fx){

                            newelem.height(thisheight - n);

                        },

                        duration: options.speed

                    }).children().show();

                    

                    oldelem.animate({

                        height: 'hide'

                    }, {

                        step: function(n, fx){

                            newelem.height(thisheight - n);

                        },

                        duration: options.speed

                    }).children().hide();

                    

                    // Switch classes for headers

                    oldelem.parent().children('a').addClass(options.closed).removeClass(options.opened);

                    newelem.parent().children('a').addClass(options.opened).removeClass(options.closed);

                }

            }

        };

        

        var itemNo = 0;

        var maxheight = 0;

        

        // Setup initial state and hover events

        $(this).children('li').each(function(){

            var thisitem = $(this);

            

            itemNo++;

            

            // Set current link to current URL to 'active' and disable anchor links

            var thislink = thisitem.children('a');

            

            if (thislink.length > 0) {

                // Hover effect for all links

                thislink.hover(function(){

                    $(this).addClass(options.hover);

                }, function(){

                    $(this).removeClass(options.hover);

                });

                

                var thishref = thislink.attr('href');

                

                if (thishref == '#') {

                    // Add a click event if the header does not contain a link

                    thislink.click(function(){

                        doHover(this);

                        this.blur();

                        return false;

                    });

                }

                else 

                    if (options.activateitem == 'true' && thisurl.indexOf(thishref) > 0 && thisurl.length - thisurl.lastIndexOf(thishref) == thishref.length) {

                        thislink.parent().addClass(options.active);

                    }

            }

            

            var thischild = thisitem.children('ul');

            

            // Initialize subitems

            if (thischild.length > 0) {

                if (maxheight < thischild.height()) 

                    maxheight = thischild.height();

                

                // Change appearance of the header element of the active item

                thischild.children('li.' + options.active).parent().parent().children('a').addClass(options.header);

                

                // Bind hover events to all subitems

                thislink.hover(function(){

                    var t = this;

                    i = setInterval(function(){

                        doHover(t);

                        clearInterval(i);

                    }, 400);

                }, function(){

                    clearInterval(i);

                });

                

                

                // Set current link to current URL to 'active'

                if (options.activateitem == 'true') {

                    thischild.children('li').each(function(){

                        var m = $(this).children('a').attr('href');

                        if (m) {

                            if (thisurl.indexOf(m) > 0 && thisurl.length - thisurl.lastIndexOf(m) == m.length) {

                                $(this).addClass(options.active).parent().parent().children('a').addClass(options.opened);

                            }

                        }

                    });

                }

                else 

                    if (parseInt(options.activateitem) == itemNo) {

                        thisitem.addClass(options.active).children('a').addClass(options.opened);

                    }

            }

            

            // Close all subitems except for those with active items

            thischild.not($(this).parent().children('li.' + options.active).children('ul')).not(thischild.children('li.' + options.active).parent()).hide().parent().children('a').addClass(options.closed);

        });

        

        return this;

    };

})(jQuery);