/**
 * 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 = "dropdown"; /*"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: "150px" ,
                    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 my_posx = 40;
            var my_posy = 0;
            Element.setStyle(this.element, {                 
                //left: (Position.positionedOffset(this.parent.element)[0]) + "px",
                left: (Position.positionedOffset(this.parent.element)[0] - Element.getWidth(this.element) + my_posx) + "px",
                //top: (Position.positionedOffset(this.parent.element)[1] + Element.getHeight(this.parent.element)) + "px"
                top: ((Position.positionedOffset(this.parent.element)[1]) + my_posy) + "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" });
        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();
	  }
	}
});


var menu;


function configMenu() {
  this.closeDelayTime = 300;
}

function initMenu() {
  menu = new Menu('root', 'menu', configMenu);
}


Event.observe(window, 'load', initMenu, false);