/**
 * dropDownMenu v0.5 sw edition An easy to implement dropDown Menu for Websites, that may be based on styled
 * list tags
 *
 * Works for IE 5.5+ PC, Mozilla 1+ all Plattforms, Opera 7+
 *
 * Copyright (c) 2004 Knallgrau New Medias Solutions GmbH, Vienna - Austria
 *
 * Original written by Matthias Platzer at http://knallgrau.at
 *
 * Modified by Sven Wappler http://www.wappler.eu
 *
 * Use it as you need it It is distributed under a BSD style license
 */

/**
 * Container Class (Prototype) for the dropDownMenu
 *
 * @param idOrElement
 *          String|HTMLElement root Node of the menu (ul)
 * @param name
 *          String name of the variable that stores the result of this constructor function
 * @param customConfigFunction
 *          Function optional config function to override the default settings for an example see
 *          Menu.prototype.config
 */
var Menu = Class.create();
Menu.prototype = {

	initialize : function(idOrElement, name, customConfigFunction) {

		this.name = name;
		this.type = "menu";
		this.closeDelayTimer = null;
		this.closingMenuItem = null;

		this.config();
		if (typeof customConfigFunction == "function") {
			this.customConfig = customConfigFunction;
			this.customConfig();
		}
		this.rootContainer = new MenuContainer(idOrElement, this);
	},

	config : function() {
		this.collapseBorders = true;
		this.quickCollapse = true;
		this.closeDelayTime = 500;
	}

}

var MenuContainer = Class.create();
MenuContainer.prototype = {
	initialize : function(idOrElement, parent) {
		this.type = "menuContainer";
		this.menuItems = [];
		this.init(idOrElement, parent);
	},

	init : function(idOrElement, parent) {
		this.element = $(idOrElement);
		this.parent = parent;
		this.parentMenu = (this.type == "menuContainer") ? ((parent) ? parent.parent : null) : parent;
		this.root = parent instanceof Menu ? parent : parent.root;
		this.id = this.element.id;

		if (this.type == "menuContainer") {
			if (this.element.hasClassName("level1")) {
				this.menuType = "horizontal";
			} else if (this.element.hasClassName("level2")) {
				this.menuType = "dropdown";
			} else {
				this.menuType = "flyout";
			}
			if (this.menuType == "flyout" || this.menuType == "dropdown") {
				this.isOpen = false;
				Element.setStyle(this.element, {
							position : "absolute",
							top : "0px",
							left : "0px",
							visibility : "hidden"
						});
			} else {
				this.isOpen = true;
			}
		} else {
			this.isOpen = this.parentMenu.isOpen;
		}

		var childNodes = this.element.childNodes;
		if (childNodes == null) {
			return;
		}

		for (var i = 0; i < childNodes.length; i++) {
			var node = childNodes[i];
			if (node.nodeType == 1) {
				if (this.type == "menuContainer") {
					if (node.tagName.toLowerCase() == "li") {
						this.menuItems.push(new MenuItem(node, this));
					}
				} else {
					if (node.tagName.toLowerCase() == "ul") {
						this.subMenu = new MenuContainer(node, this);
					}
				}
			}
		}
	},

	getBorders : function(element) {
		var ltrb = ["Left", "Top", "Right", "Bottom"];
		var result = {};
		for (var i = 0; i < ltrb.length; ++i) {
			if (this.element.currentStyle) {
				var value = parseInt(this.element.currentStyle["border" + ltrb[i] + "Width"]);
			} else if (window.getComputedStyle) {
				var value = parseInt(window.getComputedStyle(this.element, "").getPropertyValue("border-"
						+ ltrb[i].toLowerCase() + "-width"));
			} else {
				var value = parseInt(this.element.style["border" + ltrb[i]]);
			}
			result[ltrb[i].toLowerCase()] = isNaN(value) ? 0 : value;
		}
		return result;
	},

	open : function() {
		if (this.root.closeDelayTimer) {
			window.clearTimeout(this.root.closeDelayTimer);
		}
		this.parentMenu.closeAll(this);
		this.isOpen = true;
		if (this.menuType == "dropdown") {
			var thisBorders = this.getBorders();
			var left = (Position.positionedOffset(this.parent.element)[0]);
			var parentLeft = (Position.cumulativeOffset(this.parent.element)[0]);
			var vpDim = document.viewport.getDimensions();
			var vpScroll = document.viewport.getScrollOffsets();
			left = left + Math.min(0, (vpDim.width + vpScroll.left - parentLeft - this.element.getWidth()) - 10);
			Element.setStyle(this.element, {
						left : left + "px",
						top : (Position.positionedOffset(this.parent.element)[1] + Element.getHeight(this.parent.element))
								+ "px"
					});
		} else if (this.menuType == "flyout") {
			var parentMenuBorders = this.parentMenu ? this.parentMenu.getBorders() : new Object();
			var thisBorders = this.getBorders();
			if ((Position.positionedOffset(this.parentMenu.element)[0] + this.parentMenu.element.offsetWidth
					+ this.element.offsetWidth + 20) > (window.innerWidth
					? window.innerWidth
					: document.body.offsetWidth)) {
				Element.setStyle(this.element, {
							left : (-this.element.offsetWidth - (this.root.collapseBorders ? 0 : parentMenuBorders["left"]))
									+ "px"
						});
			} else {
				Element.setStyle(this.element, {
					left : (this.parentMenu.element.offsetWidth - parentMenuBorders["left"] - (this.root.collapseBorders
							? Math.min(parentMenuBorders["right"], thisBorders["left"])
							: 0))
							+ "px"
				});
			}
			Element.setStyle(this.element, {
				top : (this.parent.element.offsetTop - parentMenuBorders["top"] - this.menuItems[0].element.offsetTop)
						+ "px"
			});
		}
		Element.setStyle(this.element, {
					visibility : "visible"
				});
	},

	close : function() {
		Element.setStyle(this.element, {
					visibility : "hidden",
					left : "0px"
				});
		this.isOpen = false;
		this.closeAll();
	},

	closeAll : function(trigger) {
		for (var i = 0; i < this.menuItems.length; ++i) {
			this.menuItems[i].closeItem(trigger);
		}
	}

}

var MenuItem = Class.create();

Object.extend(Object.extend(MenuItem.prototype, MenuContainer.prototype), {
			initialize : function(idOrElement, parent) {
				var menuItem = this;
				this.type = "menuItem";
				this.subMenu;
				this.init(idOrElement, parent);
				if (this.subMenu) {
					this.element.onmouseover = function() {
						menuItem.subMenu.open();
					}
				} else {
					if (this.root.quickCollapse) {
						this.element.onmouseover = function() {
							menuItem.parentMenu.closeAll();
						}
					}
				}
				var linkTag = this.element.getElementsByTagName("A")[0];
				if (linkTag) {
					linkTag.onfocus = this.element.onmouseover;
					this.link = linkTag;
					this.text = linkTag.text;
				}
				if (this.subMenu) {
					this.element.onmouseout = function() {
						if (menuItem.root.openDelayTimer)
							window.clearTimeout(menuItem.root.openDelayTimer);
						if (menuItem.root.closeDelayTimer)
							window.clearTimeout(menuItem.root.closeDelayTimer);
						eval(menuItem.root.name + ".closingMenuItem = menuItem");
						menuItem.root.closeDelayTimer = window.setTimeout(menuItem.root.name
										+ ".closingMenuItem.subMenu.close()", menuItem.root.closeDelayTime);
					}
				}
			},

			openItem : function() {
				this.isOpen = true;
				if (this.subMenu) {
					this.subMenu.open();
				}
			},

			closeItem : function(trigger) {
				this.isOpen = false;
				if (this.subMenu) {
					if (this.subMenu != trigger)
						this.subMenu.close();
				}
			}
		});