// 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._checkbox = true;
	this._ai = 0;
	this._p;
};*/
// Node object
function Node(id, pid, name, url, title, target, icon, iconOpen, open, checkbox, disabled)
{
	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._checkbox = checkbox || true;
	this._disabled = disabled || false;
	this._ai = 0;
	this._p;
};

// Tree object
function dTree(objName, dir)
{
	this.config = {
		target					: null,
		folderLinks			: true,
		useSelection		: true,
		useCookies			: true,
		useLines				: true,
		useIcons				: true,
		useStatusText		: false,
		closeSameLevel	: false,
		inOrder					: false
	}

	this.icon = {
		root				: dir+'img/base_test.gif',
		folder			: dir+'img/folder_test.gif',
		folderOpen	: dir+'img/folderopen_test.gif',
		node				: dir+'img/page_test.gif',
		empty				: dir+'img/empty_test.gif',
		line				: dir+'img/line_test.gif',
		join				: dir+'img/join_test.gif',
		joinBottom	: dir+'img/joinbottom_test.gif',
		plus				: dir+'img/plus_test.gif',
		plusBottom	: dir+'img/plusbottom_test.gif',
		minus				: dir+'img/minus_test.gif',
		minusBottom	: dir+'img/minusbottom.gif',
		nlPlus			: dir+'img/nolines_plus_test.gif',
		nlMinus			: dir+'img/nolines_minus_test.gif'
	};

	this.obj = objName;
	this.aNodes = [];
	this.aIndent = [];
	this.root = new Node(-1);
	this.selectedNode = null;
	this.selectedFound = false;
	this.completed = false;
	this.selecting = false;
	
	this.selected_pid = [];
	this.showCheckBoxes = false;
	this.uniqueValue = 0;
	
	this.elements = new Array();
	this.arrx = new Array();
	this.zasob = new Array();
	this.ukazatel=0;
};

// Counts items in the tree
dTree.prototype.count = function()
{
  return this.aNodes.length;
}

// Adds a new node to the node array
/*dTree.prototype.add = function(id, pid, name, url, title, target, icon, iconOpen, open)
{
	this.aNodes[this.count()] = new Node(id, pid, name, url, title, target, icon, iconOpen, open, showCheckBoxes);
	if (sel_id == id)
	  this.selected_pid[this.selected_pid.length] = pid;
};
*/
// Adds a new node to the node array
dTree.prototype.add = function(id, pid, name, url, title, target, icon, iconOpen, open,checkbox, disabled)
{
	this.aNodes[this.count()] = new Node(id, pid, name, url, title, target, icon, iconOpen, open, checkbox, disabled);
	if (sel_id == id)
	  this.selected_pid[this.selected_pid.length] = pid;
};

// 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>\n';

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

	return str;
};

// Creates the tree structure
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;
};

// Checks whether the nodeId is in selected pids
dTree.prototype.in_array = function(nodeId)
{
  var result = false;
  var count = this.selected_pid.length;
  
  for (i = 0; i < count; i++)
    if (this.selected_pid[i] == nodeId) 
      result = true;

  return result;
}

// Returns parent id from id
dTree.prototype.PID = function(nodeId)
{
  var result = -1;
  var count = this.count();

  for (i = 0; i < count; i++)
    if (this.aNodes[i].id == nodeId)
      result = this.aNodes[i].pid;

  return result;
}

// Returns node name from id
dTree.prototype.getName = function(nodeId)
{
  var result = "";
  var count = this.count();

  for (i = 0; i < count; i++)
    if (this.aNodes[i].id == nodeId)
      result = this.aNodes[i].name;

  return result;
}

// Returns node name from id
dTree.prototype.getTitle = function(nodeId)
{
  var result = "";
  var count = this.count();

  for (i = 0; i < count; i++)
    if (this.aNodes[i].id == nodeId)
      result = this.aNodes[i].title;

  return result;
}

// Returns node link from id
dTree.prototype.getLink = function(nodeId)
{
  var result = "";
  var count = this.count();

  for (i = 0; i < count; i++)
    if (this.aNodes[i].id == nodeId)
      result = this.aNodes[i].url;

  return result;
}

// Selects inputs in the tree
dTree.prototype.select = function(arr)
{
  arr_count = arr.length;
  if (arr_count > 0) {
    for (j = 0; j < arr_count; j++) {
      if (Number(arr[j]) != "NaN") {
        document.getElementById("input" + arr[j]).checked = true;
        document.getElementById("changed" + arr[j]).value = "true";
      }
    }
  }
}

// Deselects inputs in the tree
dTree.prototype.deselect = function(arr)
{
  arr_count = arr.length;
  if (arr_count > 0) {
    for (j = 0; j < arr_count; j++) {
      if (Number(arr[j]) != "NaN") {
        document.getElementById("input" + arr[j]).checked = false;
        document.getElementById("changed" + arr[j]).value = "false";
      }
    }
  }
}

dTree.prototype.DejPodrizene = function()
{ 
  while (this.ukazatel>=0)
  {
    pid = this.zasob[this.ukazatel];
    if (document.getElementById("input" + pid))
    
    this.arrx[this.arrx.length] = this.zasob[this.ukazatel];
    this.zasob[this.ukazatel]="";
    this.ukazatel = this.ukazatel-1;
    
    count = this.count();
      for (i = 0; i < count; i++)
      {
        if (this.aNodes[i].pid == pid)
        {
          this.ukazatel = this.ukazatel+1;
          this.zasob[this.ukazatel] = this.aNodes[i].id;
        }
      }
  }
}

dTree.prototype.selectNode = function(pid)
{ 
  if (document.getElementById("input" + pid).checked)
    if (confirm("Vybrat podøízené?")) {
      this.arrx = new Array();
	    this.zasob = new Array();
	    this.ukazatel=0;
      
      this.zasob[this.ukazatel]=pid;
      
      this.DejPodrizene();
      
      this.select(this.arrx);
    }
  if (!document.getElementById("input" + pid).checked)
    if (confirm("Odebrat podøízené?")) {
      this.arrx = new Array();
	    this.zasob = new Array();
	    this.ukazatel=0;
	    
      this.zasob[this.ukazatel]=pid;
      
      this.DejPodrizene();
      
      this.deselect(this.arrx);
    }
}

// Creates the node icon, url and text
dTree.prototype.node = function(node, nodeId)
{
	var str = '<div class="dTreeNode">' + this.indent(node, nodeId);
	//alert(node.icon);
	if (this.config.useIcons || ((typeof(node.icon) != 'undefined') && (node.icon != ''))) {
		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 (this.showCheckBoxes && node._checkbox) {
    this.elements[this.elements.length] = ((node.id == 0) ? 0 : ++this.uniqueValue) + '_' + node.id;
    str += '\n\n<input type="checkbox" style="vertical-align: bottom;" id="input' + node.id + '" name="input' + this.elements[this.elements.length - 1] + '" ';
    str += ((sel_id == node.id) ? 'disabled="disabled" ' : '');
    str += ((node._disabled == true) ? 'disabled="yes" ' : '');
    str += ((this.in_array(node.id)) ? 'checked="checked" ' : '');
    str += 'onclick="form.changed' + this.elements[this.elements.length - 1] + '.value=(' + ((this.in_array(node.id)) ? '!' : '') + 'form.input' + ((node.id == 0) ? 0 : this.uniqueValue) + '_' + node.id + '.checked).toString();';
    str += ((this.selecting && node._hc) ? this.obj + '.selectNode(' + node.id + ');"' : '"') + ' />\n';
    str += '<input type="hidden" id="changed' + node.id + '" name="changed' + this.elements[this.elements.length - 1] + '" value="false" />\n\n';
  }
  
	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>\n';
	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>\n';
	}

	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) {
	  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;
	}
};