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

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;
};

function dTree(objName)
{
    this.config = {
	target		: null,
	folderLinks	: false,
	useSelection	: true,
	useCookies	: true,
	useLines	: true,
	useIcons	: false,
	useStatusText	: false,
	closeSameLevel	: false,
	inOrder		: false
    }
    this.icon = {
	root		: 'img/gl_list_base.gif',
    	folder		: 'img/gl_list_folder.gif',
	folderOpen	: 'img/gl_list_folderopen.gif',
	node		: 'img/gl_list_page.gif',
	empty		: 'img/gl_list_empty.gif',
	line		: 'img/gl_list_line.gif',
	join		: 'img/gl_list_join.gif',
	joinBottom	: 'img/gl_list_joinbottom.gif',
	plus		: 'img/gl_list_plus_.gif',
	plusBottom	: 'img/gl_list_plusbottom.gif',
	minus		: 'img/gl_list_minus_.gif',
	minusBottom	: 'img/gl_list_minusbottom.gif',
	nlPlus		: 'img/gl_list_nolines_plus.gif',
	nlMinus		: 'img/gl_list_nolines_minus.gif'
    };

    this.obj = objName;
    this.aNodes = [];
    this.aIndent = [];
    this.root = new Node(-1);
    this.selectedNode = null;
    this.selectedFound = false;
    this.completed = false;
};

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);

};

dTree.prototype.openAll = function()
{
    this.oAll(true);
};

dTree.prototype.closeAll = function()
{
    this.oAll(false);
};

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;
};

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

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;
};

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;
};

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;
};

dTree.prototype.getSelected = function()
{
    var sn = this.getCookie('cs' + this.obj);
    return (sn) ? sn : null;
};

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);
    }
};

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();
};

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();
};

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);
};

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]);
	}
    }
}

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]);		
	}
    }
}

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';
};

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);
};

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' : '');
};

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);
};

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);
};

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 (!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;
    }
};