/*
* jdMenu 1.4.0 (2008-01-25)
*
* Copyright (c) 2006,2007 Jonathan Sharp (http://jdsharp.us)
* Dual licensed under the MIT (MIT-LICENSE.txt)
* and GPL (GPL-LICENSE.txt) licenses.
*
* http://jdsharp.us/
*
* Built upon jQuery 1.2.1 (http://jquery.com)
* This also requires the jQuery dimensions >= 1.2 plugin
*/
$(function() {
    $('ul.jd_menu').jdMenu();
});

(function($) {
    $.jdMenu = {
        settings: [],
        getSettings: function(element) {
            var t = $(element).parents('ul.jd_menu:eq(0)')[0];
            return this.settings[t && t.$jdSettings ? t.$jdSettings : 0];
        }
    };

    function activateMenu(ul) {
        var ul = $(ul);
        var li = ul.parent();
        ul.trigger('jdMenuShow')
			.positionBy({ target: li[0],
			    targetPos: (li.parent().is('.jd_menu') ? 3 : 1),
			    elementPos: 0
			});
        li.addClass('jdm_active')
        // Hide any adjacent menus
			.siblings('li').find('ul:eq(0):visible')
				.each(function() {
				    hideMenu(this);
				});
    }

    function hideMenu(ul) {
        $(ul)
			.filter(':not(.jd_menu)')
			.find('> li ul:eq(0):visible')
				.each(function() {
				    hideMenu(this);
				})
			.end()
			.hide()
			.trigger('jdMenuHide')
			.parents('li:eq(0)')
				.removeClass('jdm_active jdm_hover')
			.end()
				.find('> li')
				.removeClass('jdm_active jdm_hover');
    }

    function getSettings(element) {
        return $.data($(element).is('.jd_menu') ? element : $(element).parents('ul.jd_menu')[0], 'jdMenuSettings'); ;
    }

    // Public methods
    $.fn.jdMenu = function(settings) {
        var settings = $.extend({ activateDelay: 500,
            showDelay: 450,
            hideDelay: 1000
        }, settings);
        return this.filter('ul.jd_menu').each(function() {
            $.data(this, 'jdMenuSettings', settings);
            $('li', this)
				.bind('mouseenter.jdmenu', function() {
				    $(this).addClass('jdm_hover');
				    var ul = $('ul:eq(0)', this);
				    if (ul.length == 1) {
				        var me = this;
				        clearTimeout(this.$jdTimer);
				        this.$jdTimer = setTimeout(function() {
				            activateMenu(ul);
				        }, getSettings(this).showDelay);
				    }
				})
				.bind('mouseleave.jdmenu', function() {
				    $(this).removeClass('jdm_hover');
				    var ul = $('ul:eq(0)', this);
				    if (ul.length == 1) {
				        var settings = $.jdMenu.getSettings(this);
				        var me = this;
				        clearTimeout(this.$jdTimer);
				        this.$jdTimer = setTimeout(function() {
				            hideMenu(ul);
				        }, getSettings(this).hideDelay);
				    }
				})
				.bind('click.jdmenu', function(evt) {
				    var ul = $('> ul', this);
				    if (ul.length == 1) {
				        activateMenu(ul);
				        return false;
				    }

				    // The user clicked the li and we need to trigger a click for the a
				    if (evt.target == this) {
				        var link = $('> a', evt.target).not('.accessible');
				        if (link.length > 0) {
				            var a = link[0];
				            if (!a.onclick) {
				                window.open(a.href, a.target || '_self');
				            } else {
				                $(a).trigger('click');
				            }
				        }
				    }
				    $(this).parent().jdMenuHide();
				    evt.stopPropagation();
				})
				.bind('keydown.jdmenu', function(e) {
				    if (e.which == 27) {
				        if (!$(this).parent().is('.jd_menu')) {
				            hideMenu($(this).parent()[0]);
				        }
				        $(this).parents('li:eq(0)').find('a:eq(0)').trigger('focus');
				        return false;
				    }
				})
				.find('> a')
					.bind('focus.jdmenu', function() {
					    $(this).parents('li:eq(0)').addClass('jdm_hover');
					})
					.bind('blur.jdmenu', function() {
					    $(this).parents('li:eq(0)').removeClass('jdm_hover');
					})
					.filter('.accessible')
						.bind('click.jdmenu', function(evt) {
						    evt.preventDefault();
						});
        });
    };

    $.fn.jdMenuUnbind = function() {
        $('li', this)
			.unbind('mouseenter.jdmenu mouseleave.jdmenu click.jdmenu keydown.jdmenu')
			.find('> a').unbind('focus.jdmenu blur.jdmenu click.jdmenu');
        return this;
    };

    $.fn.jdMenuHide = function() {
        return this.filter('ul').each(function() { hideMenu(this); });
    };

    // Private methods and logic
    $(window)
    // Bind a click event to hide all visible menus when the document is clicked
		.bind('click.jdmenu', function() {
		    $('ul.jd_menu ul:visible').jdMenuHide();
		});
})(jQuery);