/*--------------------------------------------------------------------
Scripts for creating and manipulating custom menus based on standard <ul> markup
Version: 3.0, 03.31.2009

By: Maggie Costello Wachs (maggie@filamentgroup.com) and Scott Jehl (scott@filamentgroup.com)
	http://www.filamentgroup.com
	* reference articles: http://www.filamentgroup.com/lab/jquery_ipod_style_drilldown_menu/

Copyright (c) 2009 Filament Group
Dual licensed under the MIT (filamentgroup.com/examples/mit-license.txt) and GPL (filamentgroup.com/examples/gpl-license.txt) licenses.
--------------------------------------------------------------------*/
/* Modified for Gatlin International */

$.fn.gimenu = function(options){
	var options = options;
	var m = new Menu(this, options);
	m.showMenu();
};

function Menu(container, options){
	var menu = this;

	this.menuOpen = false;
	this.menuExists = false;

	var options = jQuery.extend({
		content: null,
		width: 180, // width of menu container, must be set or passed in to calculate widths of child menus
		maxHeight: 180, // max height of menu (if a drilldown: height does not include breadcrumb)
		positionOpts: {
			posX: 'left',
			posY: 'bottom',
			offsetX: 0,
			offsetY: 0,
			directionH: 'right',
			directionV: 'down',
			detectH: true, // do horizontal collision detection
			detectV: true, // do vertical collision detection
			linkToFront: false
		},
		showSpeed: 200, // show/hide speed in milliseconds
		callerOnState: 'ui-state-active', // class to change the appearance of the link/button when the menu is showing
		loadingState: 'ui-state-loading', // class added to the link/button while the menu is created
		linkHover: 'ui-state-hover', // class for menu option hover state
		linkHoverSecondary: 'li-hover', // alternate class, may be used for multi-level menus
	// ----- multi-level menu defaults -----
		crossSpeed: 200, // cross-fade speed for multi-level menus
		crumbDefaultText: 'Choose an option:',
		backLink: true, // in the ipod-style menu: instead of breadcrumbs, show only a 'back' link
		backLinkText: 'Back',
		flyOut: false, // multi-level menus are ipod-style by default; this parameter overrides to make a flyout instead
		flyOutOnState: 'ui-state-default',
		nextMenuLink: 'ui-icon-triangle-1-e', // class to style the link (specifically, a span within the link) used in the multi-level menu to show the next level
		topLinkText: 'Back',
		nextCrumbLink: 'ui-icon-carat-1-e'
	}, options);

	this.showMenu = function(){
		if (!menu.menuExists) { menu.create() };
		menu.menuOpen = true;
	};

	this.create = function(){
		container.find('ul:first').not('.fg-menu-breadcrumb').addClass('fg-menu');
		container.find('ul, li a').addClass('ui-corner-all');

		// aria roles & attributes
		container.find('ul').attr('role', 'menu').eq(0).attr('aria-activedescendant','active-menuitem');
		container.find('li').attr('role', 'menuitem');
		container.find('li:has(ul)').attr('aria-haspopup', 'true').find('ul').attr('aria-expanded', 'false');
		container.find('a').attr('tabindex', '-1');

		// when there are multiple levels of hierarchy, create flyout or drilldown menu
		if (container.find('ul').size() > 1) {
			if (options.flyOut) { menu.flyout(container, options); }
			else { menu.drilldown(container, options); }
		}
		else {
			container.find('a').click(function(){
				menu.chooseItem(this);
				return false;
			});
		};

		if (options.linkHover) {
			var allLinks = container.find('.fg-menu li a');
			allLinks.hover(
				function(){
					var menuitem = $(this);
					$('.'+options.linkHover).removeClass(options.linkHover).blur().parent().removeAttr('id');
					$(this).addClass(options.linkHover).focus().parent().attr('id','active-menuitem');
				},
				function(){
					$(this).removeClass(options.linkHover).blur().parent().removeAttr('id');
				}
			);
		};

		if (options.linkHoverSecondary) {
			container.find('.fg-menu li').hover(
				function(){
					$(this).siblings('li').removeClass(options.linkHoverSecondary);
					if (options.flyOutOnState) { $(this).siblings('li').find('a').removeClass(options.flyOutOnState); }
					$(this).addClass(options.linkHoverSecondary);
				},
				function(){ $(this).removeClass(options.linkHoverSecondary); }
			);
		};

		menu.menuExists = true;
	};

	this.chooseItem = function(item) {
		location.href = $(item).attr('href');
	};
};

Menu.prototype.flyout = function(container, options) {
	var menu = this;

	this.resetFlyoutMenu = function(){
		var allLists = container.find('ul ul');
		allLists.removeClass('ui-widget-content').hide();
	};

	container.addClass('fg-menu-flyout').find('li:has(ul)').each(function(){
		var linkWidth = container.width();
		var showTimer, hideTimer;
		var allSubLists = $(this).find('ul');

		allSubLists.css({ left: linkWidth, width: linkWidth }).hide();

		$(this).find('a:eq(0)').addClass('fg-menu-indicator').html('<span class="label">' + $(this).find('a:eq(0)').text() + '</span><span class="ui-icon '+options.nextMenuLink+'"></span>').hover(
			function(){
				clearTimeout(hideTimer);
				var subList = $(this).next();
				if (!fitVertical(subList, $(this).offset().top)) { subList.css({ top: 'auto', bottom: 0 }); };
				if (!fitHorizontal(subList, $(this).offset().left + 100)) { subList.css({ left: 'auto', right: linkWidth, 'z-index': 999 }); };
				showTimer = setTimeout(function(){
					subList.addClass('ui-widget-content').show(options.showSpeed).attr('aria-expanded', 'true');
				}, 300);
			},
			function(){
				clearTimeout(showTimer);
				var subList = $(this).next();
				hideTimer = setTimeout(function(){
					subList.removeClass('ui-widget-content').hide(options.showSpeed).attr('aria-expanded', 'false');
				}, 400);
			}
		);

		$(this).find('ul a').hover(
			function(){
				clearTimeout(hideTimer);
				if ($(this).parents('ul').prev().is('a.fg-menu-indicator')) {
					$(this).parents('ul').prev().addClass(options.flyOutOnState);
				}
			},
			function(){
				hideTimer = setTimeout(function(){
					allSubLists.hide(options.showSpeed);
					container.find(options.flyOutOnState).removeClass(options.flyOutOnState);
				}, 500);
			}
		);
	});

	container.find('a').click(function(){
		menu.chooseItem(this);
		return false;
	});
};


Menu.prototype.drilldown = function(container, options) {
	var menu = this;
	var topList = container.find('.fg-menu');
	var breadcrumb = $('<ul class="fg-menu-breadcrumb ui-widget-header ui-corner-all ui-helper-clearfix"></ul>');
	var crumbDefaultHeader = $('<li class="fg-menu-breadcrumb-text">'+options.crumbDefaultText+'</li>');
	var firstCrumbText = (options.backLink) ? options.backLinkText : options.topLinkText;
	var firstCrumbClass = (options.backLink) ? 'fg-menu-prev-list' : 'fg-menu-all-lists';
	var firstCrumbLinkClass = (options.backLink) ? 'ui-state-default ui-corner-all' : '';
	var firstCrumbIcon = (options.backLink) ? '<span class="ui-icon ui-icon-triangle-1-w"></span>' : '';
	var firstCrumb = $('<li class="'+firstCrumbClass+'"><a href="#" class="'+firstCrumbLinkClass+'">'+firstCrumbIcon+firstCrumbText+'</a></li>');

	container.addClass('fg-menu-ipod');

	if (options.backLink) { breadcrumb.addClass('fg-menu-footer').appendTo(container).hide(); }
	else { breadcrumb.addClass('fg-menu-header').prependTo(container); };
	breadcrumb.append(crumbDefaultHeader);

	var checkMenuHeight = function(el){
		var max = container.height() - breadcrumb.height() - 3 * parseFloat(breadcrumb.css('margin-bottom'));
		if (el.height() > max) { el.addClass('fg-menu-scroll').css({ height: max }) };
	};

	var resetChildMenu = function(el){ el.removeClass('fg-menu-scroll').removeClass('fg-menu-current').height('auto'); };

	this.resetDrilldownMenu = function(){
		$('.fg-menu-current').removeClass('fg-menu-current');
		topList.animate({ left: 0 }, options.crossSpeed, function(){
			$(this).find('ul').each(function(){
				$(this).hide();
				resetChildMenu($(this));
			});
			topList.addClass('fg-menu-current');
		});
		$('.fg-menu-all-lists').find('span').remove();
		breadcrumb.empty().append(crumbDefaultHeader);
		$('.fg-menu-footer').empty().hide();
		checkMenuHeight(topList);
	};

	topList
		.addClass('fg-menu-content fg-menu-current ui-widget-content ui-helper-clearfix')
		.css({ width: container.width() })
		.find('ul')
			.css({ width: container.width(), left: container.width() })
			.addClass('ui-widget-content')
			.hide();

	topList.find('a').each(function(){
		// if the link opens a child menu:
		if ($(this).next().is('ul')) {
			$(this)
				.addClass('fg-menu-indicator')
				.each(function(){ $(this).html('<span class="label">' + $(this).text() + '</span><span class="ui-icon '+options.nextMenuLink+'"></span>'); })
				.click(function(){ // ----- show the next menu
					var nextList = $(this).next();
					var parentUl = $(this).parents('ul:eq(0)');
					var parentLeft = (parentUl.is('.fg-menu-content')) ? 0 : parseFloat(topList.css('left'));
					var nextLeftVal = Math.round(parentLeft - parseFloat(container.width()));
					var footer = $('.fg-menu-footer');

					// show next menu
					resetChildMenu(parentUl);
					checkMenuHeight(nextList);
					topList.animate({ left: nextLeftVal }, options.crossSpeed);
					nextList.show().addClass('fg-menu-current').attr('aria-expanded', 'true');

					var setPrevMenu = function(backlink){
						var b = backlink;
						var c = $('.fg-menu-current');
						var prevList = c.parents('ul:eq(0)');
						c.hide().attr('aria-expanded', 'false');
						resetChildMenu(c);
						checkMenuHeight(prevList);
						prevList.addClass('fg-menu-current').attr('aria-expanded', 'true');
						if (prevList.hasClass('fg-menu-content')) { b.remove(); footer.hide(); };
					};

					// initialize "back" link
					if (options.backLink) {
						if (footer.find('a').size() == 0) {
							footer.show();
							$('<a href="#"><span class="ui-icon ui-icon-triangle-1-w"></span> <span>Back</span></a>')
								.appendTo(footer)
								.click(function(){ // ----- show the previous menu
									var b = $(this);
									var prevLeftVal = parseFloat(topList.css('left')) + container.width();
									topList.animate({ left: prevLeftVal },  options.crossSpeed, function(){
										setPrevMenu(b);
									});
									return false;
								});
						}
					}
					// or initialize top breadcrumb
					else {
						if (breadcrumb.find('li').size() == 1){
							breadcrumb.empty().append(firstCrumb);
							firstCrumb.find('a').click(function(){
								menu.resetDrilldownMenu();
								return false;
							});
						}
						$('.fg-menu-current-crumb').removeClass('fg-menu-current-crumb');
						var crumbText = $(this).find('span:eq(0)').text();
						var newCrumb = $('<li class="fg-menu-current-crumb"><a href="javascript://" class="fg-menu-crumb">'+crumbText+'</a></li>');
						newCrumb
							.appendTo(breadcrumb)
							.find('a').click(function(){
								if ($(this).parent().is('.fg-menu-current-crumb')){
									menu.chooseItem(this);
								}
								else {
									var newLeftVal = - ($('.fg-menu-current').parents('ul').size() - 1) * 180;
									topList.animate({ left: newLeftVal }, options.crossSpeed, function(){
										setPrevMenu();
									});

									// make this the current crumb, delete all breadcrumbs after this one, and navigate to the relevant menu
									$(this).parent().addClass('fg-menu-current-crumb').find('span').remove();
									$(this).parent().nextAll().remove();
								};
								return false;
							});
						newCrumb.prev().append(' <span class="ui-icon '+options.nextCrumbLink+'"></span>');
					}

					checkMenuHeight(nextList);
					return false;
				});
		}
		// if the link is a leaf node (doesn't open a child menu)
		else {
			$(this).click(function(){
				menu.chooseItem(this);
				return false;
			});
		};
	});

	checkMenuHeight(topList);
};


/* Utilities to find viewport dimensions */

function getScrollTop(){
	return self.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop;
};

function getScrollLeft(){
	return self.pageXOffset || document.documentElement.scrollLeft || document.body.scrollLeft;
};

function getWindowHeight(){
	var de = document.documentElement;
	return self.innerHeight || (de && de.clientHeight) || document.body.clientHeight;
};

function getWindowWidth(){
	var de = document.documentElement;
	return self.innerWidth || (de && de.clientWidth) || document.body.clientWidth;
};

/* Utilities to test whether an element will fit in the viewport
	Parameters:
	el = element to position, required
	leftOffset / topOffset = optional parameter if the offset cannot be calculated (i.e., if the object is in the DOM but is set to display: 'none') */

function fitHorizontal(el, leftOffset){
	var leftVal = parseInt(leftOffset) || $(el).offset().left;
	return (leftVal + $(el).width() <= getWindowWidth() + getScrollLeft() && leftVal - getScrollLeft() >= 0);
};

function fitVertical(el, topOffset){
	var topVal = parseInt(topOffset) || $(el).offset().top;
	return (topVal + $(el).height() <= getWindowHeight() + getScrollTop() && topVal - getScrollTop() >= 0);
};