/*--------------------------------------------------|

| dTree 2.05 | www.destroydrop.com/javascript/tree/ |

|---------------------------------------------------|

| Copyright (c) 2002-2003 Geir Landrö               |

|                                                   |

| This script can be used freely as long as all     |

| copyright messages are intact.                    |

|                                                   |

| Updated: 17.04.2003                               |

|--------------------------------------------------*/



// Node object


function Node (id, pid, name, url, title, target, icon, iconOpen, open)
{

   this.id = id;

   this.pid = pid;

   this.name = name;

   this.url = url;

   this.title = title;

   this.target = target;

   this.icon = icon;

   this.iconOpen = iconOpen;

   this._io = open || false;

   this._is = false;

   this._ls = false;

   this._hc = false;

   this._ai = 0;

   this._p;

};



// Tree object


function dTree(objName)
{

   this.config =
   {

      target		: null,

      folderLinks	: true,
      useSelection	: true,
      useCookies	: true,

      useLines		: true,

      useIcons		: true,

      useStatusText	: false,

      closeSameLevel	: false,

      inOrder		: false

   }


   this.icon =
   {

      root		: 'menu/img/base.gif',

      folder		: 'menu/img/folder.gif',

      folderOpen	: 'menu/img/folderopen.gif',

      node		: 'menu/img/page.gif',

      empty		: 'menu/img/empty.gif',

      line		: 'menu/img/line.gif',

      join		: 'menu/img/join.gif',

      joinBottom	: 'menu/img/joinbottom.gif',

      plus		: 'menu/img/plus.gif',

      plusBottom	: 'menu/img/plusbottom.gif',

      minus		: 'menu/img/minus.gif',

      minusBottom	: 'menu/img/minusbottom.gif',

      nlPlus		: 'menu/img/nolines_plus.gif',

      nlMinus		: 'menu/img/nolines_minus.gif'

   };


   this.obj = objName;

   this.aNodes = [];

   this.aIndent = [];

   this.root = new Node(-1);

   this.selectedNode = null;

   this.selectedFound = false;

   this.completed = false;

};



// ---------------------------------
// Adds a new node to the node array
// ---------------------------------


dTree.prototype.add = function(id, pid, name, url, title, target, icon, iconOpen, open)
{

   this.aNodes[this.aNodes.length] = new Node(id, pid, name, url, title, target, icon, iconOpen, open);

};


// --------------------

// Open/close all nodes
// --------------------


dTree.prototype.openAll = function()
{

   this.oAll(true);

};


dTree.prototype.closeAll = function()
{

   this.oAll(false);

};


// ----------------------------

// Outputs the tree to the page
// ----------------------------


dTree.prototype.toString = function()
{

   var str = '<div class="dtree">\n';

   if (document.getElementById)
   {

      if (this.config.useCookies) this.selectedNode = this.getSelected();

         str += this.addNode(this.root);

   }
   else
   {
      str += 'Browser not supported.';
   }


   str += '</div>';


   if (!this.selectedFound) this.selectedNode = null;

   this.completed = true;

   return str;

};


// --------------------------

// Creates the tree structure
// --------------------------


dTree.prototype.addNode = function(pNode)
{
   var n   =  0;

   var str = '';



   if (this.config.inOrder) n = pNode._ai;


   for (n; n<this.aNodes.length; n++)
   {

      if (this.aNodes[n].pid == pNode.id)
      {

         var cn = this.aNodes[n];

         cn._p  = pNode;

         cn._ai = n;

         this.setCS(cn);

         if (!cn.target && this.config.target) cn.target = this.config.target;

         if (cn._hc && !cn._io && this.config.useCookies) cn._io = this.isOpen(cn.id);

         if (!this.config.folderLinks && cn._hc) cn.url = null;

         if (this.config.useSelection && cn.id == this.selectedNode && !this.selectedFound)
         {

            cn._is = true;

            this.selectedNode = n;

            this.selectedFound = true;

         }

         str += this.node(cn, n);

         if (cn._ls) break;

      }

   }

   return str;

};


// -----------------------------------

// Creates the node icon, url and text
// -----------------------------------


dTree.prototype.node = function(node, nodeId) {

	var str = '<div class="dTreeNode">' + this.indent(node, nodeId);

	if (this.config.useIcons) {

		if (!node.icon) node.icon = (this.root.id == node.pid) ? this.icon.root : ((node._hc) ? this.icon.folder : this.icon.node);

		if (!node.iconOpen) node.iconOpen = (node._hc) ? this.icon.folderOpen : this.icon.node;

		if (this.root.id == node.pid) {

			node.icon = this.icon.root;

			node.iconOpen = this.icon.root;

		}

		str += '<img id="i' + this.obj + nodeId + '" src="' + ((node._io) ? node.iconOpen : node.icon) + '" alt="" />';

	}

	if (node.url) {

		str += '<a id="s' + this.obj + nodeId + '" class="' + ((this.config.useSelection) ? ((node._is ? 'nodeSel' : 'node')) : 'node') + '" href="' + node.url + '"';

		if (node.title) str += ' title="' + node.title + '"';

		if (node.target) str += ' target="' + node.target + '"';

		if (this.config.useStatusText) str += ' onmouseover="window.status=\'' + node.name + '\';return true;" onmouseout="window.status=\'\';return true;" ';

		if (this.config.useSelection && ((node._hc && this.config.folderLinks) || !node._hc))

			str += ' onclick="javascript: ' + this.obj + '.s(' + nodeId + ');"';

		str += '>';

	}

	else if ((!this.config.folderLinks || !node.url) && node._hc && node.pid != this.root.id)

		str += '<a href="javascript: ' + this.obj + '.o(' + nodeId + ');" class="node">';

	str += node.name;

	if (node.url || ((!this.config.folderLinks || !node.url) && node._hc)) str += '</a>';

	str += '</div>';

	if (node._hc) {

		str += '<div id="d' + this.obj + nodeId + '" class="clip" style="display:' + ((this.root.id == node.pid || node._io) ? 'block' : 'none') + ';">';

		str += this.addNode(node);

		str += '</div>';

	}

	this.aIndent.pop();

	return str;

};



// Adds the empty and line icons

dTree.prototype.indent = function(node, nodeId) {

	var str = '';

	if (this.root.id != node.pid) {

		for (var n=0; n<this.aIndent.length; n++)

			str += '<img src="' + ( (this.aIndent[n] == 1 && this.config.useLines) ? this.icon.line : this.icon.empty ) + '" alt="" />';

		(node._ls) ? this.aIndent.push(0) : this.aIndent.push(1);

		if (node._hc) {

			str += '<a href="javascript: ' + this.obj + '.o(' + nodeId + ');"><img id="j' + this.obj + nodeId + '" src="';

			if (!this.config.useLines) str += (node._io) ? this.icon.nlMinus : this.icon.nlPlus;

			else str += ( (node._io) ? ((node._ls && this.config.useLines) ? this.icon.minusBottom : this.icon.minus) : ((node._ls && this.config.useLines) ? this.icon.plusBottom : this.icon.plus ) );

			str += '" alt="" /></a>';

		} else str += '<img src="' + ( (this.config.useLines) ? ((node._ls) ? this.icon.joinBottom : this.icon.join ) : this.icon.empty) + '" alt="" />';

	}

	return str;

};



// Checks if a node has any children and if it is the last sibling

dTree.prototype.setCS = function(node) {

	var lastId;

	for (var n=0; n<this.aNodes.length; n++) {

		if (this.aNodes[n].pid == node.id) node._hc = true;

		if (this.aNodes[n].pid == node.pid) lastId = this.aNodes[n].id;

	}

	if (lastId==node.id) node._ls = true;

};



// Returns the selected node

dTree.prototype.getSelected = function() {

	var sn = this.getCookie('cs' + this.obj);

	return (sn) ? sn : null;

};



// Highlights the selected node

dTree.prototype.s = function(id) {

	if (!this.config.useSelection) return;

	var cn = this.aNodes[id];

	if (cn._hc && !this.config.folderLinks) return;

	if (this.selectedNode != id) {

		if (this.selectedNode || this.selectedNode==0) {

			eOld = document.getElementById("s" + this.obj + this.selectedNode);

			eOld.className = "node";

		}

		eNew = document.getElementById("s" + this.obj + id);

		eNew.className = "nodeSel";

		this.selectedNode = id;

		if (this.config.useCookies) this.setCookie('cs' + this.obj, cn.id);

	}

};



// Toggle Open or close

dTree.prototype.o = function(id) {

	var cn = this.aNodes[id];

	this.nodeStatus(!cn._io, id, cn._ls);

	cn._io = !cn._io;

	if (this.config.closeSameLevel) this.closeLevel(cn);

	if (this.config.useCookies) this.updateCookie();

};



// Open or close all nodes

dTree.prototype.oAll = function(status) {

	for (var n=0; n<this.aNodes.length; n++) {

		if (this.aNodes[n]._hc && this.aNodes[n].pid != this.root.id) {

			this.nodeStatus(status, n, this.aNodes[n]._ls)

			this.aNodes[n]._io = status;

		}

	}

	if (this.config.useCookies) this.updateCookie();

};



// Opens the tree to a specific node

dTree.prototype.openTo = function(nId, bSelect, bFirst) {

	if (!bFirst) {

		for (var n=0; n<this.aNodes.length; n++) {

			if (this.aNodes[n].id == nId) {

				nId=n;

				break;

			}

		}

	}

	var cn=this.aNodes[nId];

	if (cn.pid==this.root.id || !cn._p) return;

	cn._io = true;

	cn._is = bSelect;

	if (this.completed && cn._hc) this.nodeStatus(true, cn._ai, cn._ls);

	if (this.completed && bSelect) this.s(cn._ai);

	else if (bSelect) this._sn=cn._ai;

	this.openTo(cn._p._ai, false, true);

};



// Closes all nodes on the same level as certain node

dTree.prototype.closeLevel = function(node) {

	for (var n=0; n<this.aNodes.length; n++) {

		if (this.aNodes[n].pid == node.pid && this.aNodes[n].id != node.id && this.aNodes[n]._hc) {

			this.nodeStatus(false, n, this.aNodes[n]._ls);

			this.aNodes[n]._io = false;

			this.closeAllChildren(this.aNodes[n]);

		}

	}

}



// Closes all children of a node

dTree.prototype.closeAllChildren = function(node) {

	for (var n=0; n<this.aNodes.length; n++) {

		if (this.aNodes[n].pid == node.id && this.aNodes[n]._hc) {

			if (this.aNodes[n]._io) this.nodeStatus(false, n, this.aNodes[n]._ls);

			this.aNodes[n]._io = false;

			this.closeAllChildren(this.aNodes[n]);		

		}

	}

}



// Change the status of a node(open or closed)

dTree.prototype.nodeStatus = function(status, id, bottom) {

	eDiv	= document.getElementById('d' + this.obj + id);

	eJoin	= document.getElementById('j' + this.obj + id);

	if (this.config.useIcons) {

		eIcon	= document.getElementById('i' + this.obj + id);

		eIcon.src = (status) ? this.aNodes[id].iconOpen : this.aNodes[id].icon;

	}

	eJoin.src = (this.config.useLines)?

	((status)?((bottom)?this.icon.minusBottom:this.icon.minus):((bottom)?this.icon.plusBottom:this.icon.plus)):

	((status)?this.icon.nlMinus:this.icon.nlPlus);

	eDiv.style.display = (status) ? 'block': 'none';

};





// [Cookie] Clears a cookie

dTree.prototype.clearCookie = function() {

	var now = new Date();

	var yesterday = new Date(now.getTime() - 1000 * 60 * 60 * 24);

	this.setCookie('co'+this.obj, 'cookieValue', yesterday);

	this.setCookie('cs'+this.obj, 'cookieValue', yesterday);

};



// [Cookie] Sets value in a cookie

dTree.prototype.setCookie = function(cookieName, cookieValue, expires, path, domain, secure) {

	document.cookie =

		escape(cookieName) + '=' + escape(cookieValue)

		+ (expires ? '; expires=' + expires.toGMTString() : '')

		+ (path ? '; path=' + path : '')

		+ (domain ? '; domain=' + domain : '')

		+ (secure ? '; secure' : '');

};



// [Cookie] Gets a value from a cookie

dTree.prototype.getCookie = function(cookieName) {

	var cookieValue = '';

	var posName = document.cookie.indexOf(escape(cookieName) + '=');

	if (posName != -1) {

		var posValue = posName + (escape(cookieName) + '=').length;

		var endPos = document.cookie.indexOf(';', posValue);

		if (endPos != -1) cookieValue = unescape(document.cookie.substring(posValue, endPos));

		else cookieValue = unescape(document.cookie.substring(posValue));

	}

	return (cookieValue);

};



// [Cookie] Returns ids of open nodes as a string


dTree.prototype.updateCookie = function() {

	var str = '';

	for (var n=0; n<this.aNodes.length; n++) {

		if (this.aNodes[n]._io && this.aNodes[n].pid != this.root.id) {

			if (str) str += '.';

			str += this.aNodes[n].id;

		}

	}

	this.setCookie('co' + this.obj, str);

};


// -------------------------------------------

// [Cookie] Checks if a node id is in a cookie
// -------------------------------------------


dTree.prototype.isOpen = function(id)
{

   var aOpen = this.getCookie('co' + this.obj).split('.');


   for (var n=0; n<aOpen.length; n++)
   {

      if (aOpen[n] == id)
         return true;
   }

   return false;

};


// -------------------------------------------------

// If Push and pop is not implemented by the browser
// -------------------------------------------------


if (!Array.prototype.push)
{

   Array.prototype.push = function array_push()
   {

      for(var i=0;i<arguments.length;i++)

         this[this.length]=arguments[i];

      return this.length;

   }

};



if (!Array.prototype.pop)
{

   Array.prototype.pop = function array_pop()
   {
      lastElement = this[this.length-1];

      this.length = Math.max(this.length-1,0);

      return lastElement;

   }

};