/**
 * dropDownMenu v0.4 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("dropdown")) this.menuType = "dropdown";
            else if (this.element.hasClassName("flyout")) this.menuType = "flyout";
            else if (this.element.hasClassName("horizontal")) this.menuType = "horizontal";
            else this.menuType = "standard";
            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") {
                Element.setStyle(this.element,{
                        left: (Position.positionedOffset(this.parent.element)[0]) + "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"});
                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);