/* clickMenu - v0.1.6
 * Copyright (c) 2007 Roman Weich
 * http://p.sohei.org
 *
 * Changelog: 
 * v 0.1.6 - 2007-09-06
 *  -fix: having a link in the top-level menu would not open the menu but call the link instead
 * v 0.1.5 - 2007-07-07
 *  -change/fix: menu opening/closing now through simple show() and hide() calls - before fadeIn and fadeOut were used for which extra functions to stop a already running animation were created -> they were 
 *          buggy (not working with the interface plugin in jquery1.1.2 and not working with jquery1.1.3 at all) and now removed
 *  -change: removed option: fadeTime
 *  -change: now using the bgiframe plugin for adding iframes in ie6 when available
 * v 0.1.4 - 2007-03-20
 *  -fix: the default options were overwritten by the context related options
 *  -fix: hiding a submenu all hover- and click-events were unbound, even the ones not defined in this plugin - unbinding should work now
 * v 0.1.3 - 2007-03-13
 *  -fix: some display problems ie had when no width was set on the submenu, so on ie the width for each submenu will be explicitely set
 *  -fix: the fix to the ie-width-problem is a fix to the "ie does not support css min-width stuff" problem too which displayed some submenus too narrow (it looked just not right)
 *  -fix: some bugs, when user the was too fast with the mouse
 * v 0.1.2 - 2007-03-11
 *  -change: made a lot changes in the traversing routines to speed things up (having better memory usage now as well)
 *  -change: added $.fn.clickMenu.setDefaults() for setting global defaults
 *  -fix: hoverbug when a main menu item had no submenu
 *  -fix: some bugs i found while rewriting most of the stuff
 * v 0.1.1 - 2007-03-04
 *  -change: the width of the submenus is no longer fixed, its set in the plugin now
 *  -change: the submenu-arrow is now an img, not the background-img of the list element - that allows better positioning, and background-changes on hover (you have to set the image through the arrowSrc option)
 *  -fix: clicking on a clickMenu while another was already open, didn't close the open one
 *  -change: clicking on the open main menu item will close it
 *  -fix: on an open menu moving the mouse to a main menu item and moving it fastly elsewere hid the whole menu
 * v 0.1.0 - 2007-03-03
 */

(function($)
{
    var defaults = {
        onClick: function(){
            $(this).find('>a').each(function(){
                if ( this.href )
                {
                    window.location = this.href;
                }
            });
        },
        arrowSrc: '',
        subDelay: 300,
        mainDelay: 10
    };

    $.fn.clickMenu = function(options) 
    {
    
        var shown = false;
        var liOffset = ( ($.browser.msie) ? 4 : 2 );

        var settings = $.extend({}, defaults, options);

        var hideDIV = function(div, delay)
        {
            //a timer running to show the div?
            if ( div.timer && !div.isVisible )
            {
                clearTimeout(div.timer);
            }
            else if (div.timer)
            {
                return; //hide-timer already running
            }
            if ( div.isVisible )
            {
                div.timer = setTimeout(function()
                {
                    //remove events
                    $(getAllChilds(getOneChild(div, 'UL'), 'LI')).unbind('mouseover', liHoverIn).unbind('mouseout', liHoverOut).unbind('click', settings.onClick);
                    //hide it
                    $(div).hide();
                    div.isVisible = false;
                    div.timer = null;
                }, delay);
            }
        };

        var showDIV = function(div, delay)
        {
        
            if ( div.timer )
            {
                clearTimeout(div.timer);
            }
            if ( !div.isVisible )
            {
                $(div).css('top', -$(div).height());
                
                div.timer = setTimeout(function()
                {
                    //check if the mouse is still over the parent item - if not dont show the submenu
                    if ( !checkClass(div.parentNode, 'hover') )
                    {
                        return;
                    }
                    //assign events to all div>ul>li-elements
                    $(getAllChilds(getOneChild(div, 'UL'), 'LI')).mouseover(liHoverIn).mouseout(liHoverOut).click(settings.onClick);
                    //positioning
                    if ( !checkClass(div.parentNode, 'main') )
                    {
                        $(div).css('left', div.parentNode.offsetWidth - liOffset);
                    }
                    //show it
                    div.isVisible = true; //we use this over :visible to speed up traversing
                    $(div).show();
                    if ( $.browser.msie ) //fixing a display-bug in ie6 and adding min-width
                    {
                        var cW = $(getOneChild(div, 'UL')).width();
                        if ( cW < 100 )
                        {
                            cW = 100;
                        }
                        $(div).css('width', cW);
                    }
                    div.timer = null;
                }, delay);
            }
        };

        //same as hover.handlehover in jquery - just can't use hover() directly - need the ability to unbind only the one hover event
        var testHandleHover = function(e)
        {
            // Check if mouse(over|out) are still within the same parent element
            var p = (e.type == "mouseover" ? e.fromElement : e.toElement) || e.relatedTarget;
            // Traverse up the tree
            while ( p && p != this )
            {
                try
                { 
                    p = p.parentNode;
                }
                catch(e)
                { 
                    p = this;
                }
            }
            // If we actually just moused on to a sub-element, ignore it
            if ( p == this )
            {
                return false;
            }
            return true;
        };
        
        var mainHoverIn = function(e)
        {
            //no need to test e.target==this, as no child has the same event binded
            //its possible, that a main menu item still has hover (if it has no submenu) - thus remove it
            var lis = getAllChilds(this.parentNode, 'LI');
            var pattern = new RegExp("(^|\\s)hover(\\s|$)");
            for (var i = 0; i < lis.length; i++)
            {
                if ( pattern.test(lis[i].className) )
                {
                    $(lis[i]).removeClass('hover');
                }
            }
            $(this).addClass('hover');
            if ( shown )
            {
                hoverIn(this, settings.mainDelay);
            }
        };

        var liHoverIn = function(e)
        {
            if ( !testHandleHover(e) )
            {
                return false;
            }
            if ( e.target != this )
            {
                //look whether the target is a direct child of this (maybe an image)
                if ( !isChild(this, e.target) )
                {
                    return;
                }
            }
            hoverIn(this, settings.subDelay);
        };

        var hoverIn = function(li, delay)
        {
            var innerDiv = getOneChild(li, 'DIV');
            //stop running timers from the other menus on the same level - a little faster than $('>*>div', li.parentNode)
            var n = li.parentNode.firstChild;
            for ( ; n; n = n.nextSibling ) 
            {
                if ( n.nodeType == 1 && n.nodeName.toUpperCase() == 'LI' )
                {
                    var div = getOneChild(n, 'DIV');
                    if ( div && div.timer && !div.isVisible ) //clear show-div timer
                    {
                        clearTimeout(div.timer);
                        div.timer = null;
                    }
                }
            }
            //is there a timer running to hide one of the parent divs? stop it
            var pNode = li.parentNode;
            for ( ; pNode; pNode = pNode.parentNode ) 
            {
                if ( pNode.nodeType == 1 && pNode.nodeName.toUpperCase() == 'DIV' )
                {
                    if (pNode.timer)
                    {
                        clearTimeout(pNode.timer);
                        pNode.timer = null;
                        $(pNode.parentNode).addClass('hover');
                    }
                }
            }
            //highlight the current element
            $(li).addClass('hover');
            //is the submenu already visible?
            if ( innerDiv && innerDiv.isVisible )
            {
                //hide-timer running?
                if ( innerDiv.timer )
                {
                    clearTimeout(innerDiv.timer);
                    innerDiv.timer = null;
                }
                else
                {
                    return;
                }
            }
            //hide all open menus on the same level and below and unhighlight the li item (but not the current submenu!)
            $(li.parentNode.getElementsByTagName('DIV')).each(function(){
                if ( this != innerDiv && this.isVisible )
                {
                    hideDIV(this, delay);
                    $(this.parentNode).removeClass('hover');
                }
            });
            //show the submenu, if there is one
            if ( innerDiv )
            {
                showDIV(innerDiv, delay);
            }
        };

        var liHoverOut = function(e)
        {
            if ( !testHandleHover(e) )
            {
                return false;
            }
            if ( e.target != this )
            {
                if ( !isChild(this, e.target) ) //return only if the target is no direct child of this
                {
                    return;
                }
            }
            //remove the hover from the submenu item, if the mouse is hovering out of the menu (this is only for the last open (levelwise) (sub-)menu)
            var div = getOneChild(this, 'DIV');
            if ( !div )
            {
                $(this).removeClass('hover');
            }
            else 
            {
                if ( !div.isVisible )
                {
                    $(this).removeClass('hover');
                }
            }
        };

        var mainHoverOut = function(e)
        {
            //no need to test e.target==this, as no child has the same event binded
            //remove hover
            var div = getOneChild(this, 'DIV');
            var relTarget = e.relatedTarget || e.toElement; //this is undefined sometimes (e.g. when the mouse moves out of the window), so dont remove hover then
            var p;
            if ( !shown )
            {
                $(this).removeClass('hover');
            }
            else if ( !div && relTarget ) //menuitem has no submenu, so dont remove the hover if the mouse goes outside the menu
            {
                p = findParentWithClass(e.target, 'UL', 'clickMenu');
                if ( p.contains(relTarget))
                {
                    $(this).removeClass('hover');
                }
            }
            else if ( relTarget )
            {
                //remove hover only when moving to anywhere inside the clickmenu
                p = findParentWithClass(e.target, 'UL', 'clickMenu');
                if ( !div.isVisible && (p.contains(relTarget)) )
                {
                    $(this).removeClass('hover');
                }
            }
        };

        var mainClick = function()
        {
 
            var div = getOneChild(this, 'DIV');
            if ( div && div.isVisible ) //clicked on an open main-menu-item
            {
                clean();
                $(this).addClass('hover');
            }
            else
            {
                hoverIn(this, settings.mainDelay);
                shown = true;
                $(document).bind('mousedown', checkMouse);
            }
            return false;
        };

        var checkMouse = function(e)
        {
            //is the mouse inside a clickmenu? if yes, is it an open (the current) one?
            var vis = false;
            var cm = findParentWithClass(e.target, 'UL', 'clickMenu');
            if ( cm )
            {
                $(cm.getElementsByTagName('DIV')).each(function(){
                    if ( this.isVisible )
                    {
                        vis = true;
                    }
                });
            }
            if ( !vis )
            {
                clean();
            }
        };

        var clean = function()
        {
            //remove timeout and hide the divs
            $('ul.clickMenu div.outerbox').each(function(){
                if ( this.timer )
                {
                    clearTimeout(this.timer);
                    this.timer = null;
                }
                if ( this.isVisible )
                {
                    $(this).hide();
                    this.isVisible = false;
                }
            });
            $('ul.clickMenu li').removeClass('hover');
            //remove events
            $('ul.clickMenu>li li').unbind('mouseover', liHoverIn).unbind('mouseout', liHoverOut).unbind('click', settings.onClick);
            $(document).unbind('mousedown', checkMouse);
            shown = false;
        };

        var getOneChild = function(elem, name)
        {
            if ( !elem )
            {
                return null;
            }
            var n = elem.firstChild;
            for ( ; n; n = n.nextSibling ) 
            {
                if ( n.nodeType == 1 && n.nodeName.toUpperCase() == name )
                {
                    return n;
                }
            }
            return null;
        };

        var getAllChilds = function(elem, name)
        {
            if ( !elem )
            {
                return [];
            }
            var r = [];
            var n = elem.firstChild;
            for ( ; n; n = n.nextSibling ) 
            {
                if ( n.nodeType == 1 && n.nodeName.toUpperCase() == name )
                {
                    r[r.length] = n;
                }
            }
            return r;
        };

        var findParentWithClass = function(elem, searchTag, searchClass)
        {
            var pNode = elem.parentNode;
            var pattern = new RegExp("(^|\\s)" + searchClass + "(\\s|$)");
            for ( ; pNode; pNode = pNode.parentNode )
            {
                if ( pNode.nodeType == 1 && pNode.nodeName.toUpperCase() == searchTag && pattern.test(pNode.className) )
                {
                    return pNode;
                }
            }
            return null;
        };
        
        var checkClass = function(elem, searchClass)
        {
            var pattern = new RegExp("(^|\\s)" + searchClass + "(\\s|$)");
            if ( pattern.test(elem.className) )
            {
                return true;
            }
            return false;
        };
        
        var isChild = function(elem, childElem)
        {
            var n = elem.firstChild;
            for ( ; n; n = n.nextSibling ) 
            {
                if ( n == childElem )
                {
                    return true;
                }
            }
            return false;
        };

        return this.each(function()
        {
            //add .contains() to mozilla - http://www.quirksmode.org/blog/archives/2006/01/contains_for_mo.html
            if (window.Node && Node.prototype && !Node.prototype.contains)
            {
                Node.prototype.contains = function(arg) 
                {
                    return !!(this.compareDocumentPosition(arg) & 16);
                };
            }
            //add class
            if ( !checkClass(this, 'clickMenu') )
            {
                $(this).addClass('clickMenu');
            }
            //add shadows
            $('ul', this).shadowBox();
            //ie6? - add iframes
            if ( $.browser.msie && (!$.browser.version || parseInt($.browser.version) <= 6) )
            {
                if ( $.fn.bgiframe )
                {
                    $('div.outerbox', this).bgiframe();
                }
                else
                {
                    /* thanks to Mark Gibson - http://www.nabble.com/forum/ViewPost.jtp?post=6504414&framed=y */
                    $('div.outerbox', this).append('<iframe style="display:block;position:absolute;top:0;left:0;z-index:-1;filter:mask();' + 
                                    'width:expression(this.parentNode.offsetWidth);height:expression(this.parentNode.offsetHeight)"/>');
                }
            }
            //assign events
            $(this).bind('closemenu', function(){clean();}); //assign closemenu-event, through wich the menu can be closed from outside the plugin
            //add click event handling, if there are any elements inside the main menu
            var liElems = getAllChilds(this, 'LI');
            for ( var j = 0; j < liElems.length; j++ )
            {
                if ( getOneChild(getOneChild(getOneChild(liElems[j], 'DIV'), 'UL'), 'LI') ) // >div>ul>li
                {
                    $(liElems[j]).click(mainClick);
                }
            }
            //add hover event handling and assign classes
            $(liElems).hover(mainHoverIn, mainHoverOut).addClass('main').find('>div').addClass('inner');
            //add the little arrow before each submenu
            if ( settings.arrowSrc )
            {
                $('div.inner div.outerbox', this).before('<img src="' + settings.arrowSrc + '" class="liArrow" />');
            }

            //the floating list elements are destroying the layout..so make it nice again..
            $(this).wrap('<div class="cmDiv"></div>').after('<div style="clear: both; visibility: hidden;"></div>');
        });
    };
    $.fn.clickMenu.setDefaults = function(o)
    {
        $.extend(defaults, o);
    };
})(jQuery);

(function($)
{
    $.fn.shadowBox = function() {
        return this.each(function()
        {
            var outer = $('<div class="outerbox"></div>').get(0);
            if ( $(this).css('position') == 'absolute' )
            {
                //if the child(this) is positioned abolute, we have to use relative positioning and shrink the outerbox accordingly to the innerbox
                $(outer).css({position:'relative', width:this.offsetWidth, height:this.offsetHeight});
            }
            else
            {
                //shrink the outerbox
                $(outer).css('position', 'absolute');
            }
            //add the boxes
            $(this).addClass('innerBox').wrap(outer).
                    before('<div class="shadowbox1"></div><div class="shadowbox2"></div><div class="shadowbox3"></div>');
        });
    };
})(jQuery);