/*--------------------------------------------------|
| nTree 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: 03.05.2005                               |
| Updated: tocco                                    |
|--------------------------------------------------*/

// 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 nTree(objName,readonly,multiple,required,iconpath,selectedField,newField,deleteField) {
	this.config = {
		target				: null,
		folderLinks			: true,
		useSelection		: true,
		useCookies			: false,
		useLines			: true,
		useIcons			: true,
		useStatusText		: false,
		closeSameLevel		: false,
		inOrder				: false
	}
	this.icon = {
		root				: iconpath + 'base.gif',
		folder				: iconpath + 'folder.gif',
		folderOpen			: iconpath + 'folder.gif',
		node				: iconpath + 'folder.gif',
		empty				: iconpath + 'empty.gif',
		line				: iconpath + 'line.gif',
		join				: iconpath + 'join.gif',
		joinBottom			: iconpath + 'joinbottom.gif',
		plus				: iconpath + 'plus.gif',
		plusBottom			: iconpath + 'plusbottom.gif',
		minus				: iconpath + 'minus.gif',
		minusBottom			: iconpath + 'minusbottom.gif',
		nlPlus				: iconpath + 'nolines_plus.gif',
		nlMinus				: iconpath + 'nolines_minus.gif'
	};
	this.obj = objName;
	this.aNodes = [];
	this.aIndent = [];
	this.root = new Node(-1);
	if (selectedField.value.length > 0) {
		this.selectedNode = selectedField.value.split(",");
	} else {
		this.selectedNode = [];
	}
	this.selectedFound = true;
	this.completed = false;
	if (newField != null && newField.value.length > 0) {
		this.newNode = newField.value.split(",");
	} else {
		this.newNode = [];
	}
	if (deleteField != null && deleteField.value.length > 0) {
		this.deleteNode = deleteField.value.split(",");
	} else {
		this.deleteNode = [];
	}
	this.readonly = readonly;
	this.multiple = multiple;
	this.required = required;
	this.selectedField = selectedField;
	this.newField = newField;
	this.deleteField = deleteField;
};

// Adds a new node to the node array
nTree.prototype.a = 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
nTree.prototype.openAll = function() {
	this.oAll(true);
};
nTree.prototype.closeAll = function() {
	this.oAll(false);
};
// select/deselect all nodes
nTree.prototype.selectAll = function() {
	for (var i=0; i<this.aNodes.length; i++) {
		n = this.aNodes[i];
		if (!this.ArrayExist(this.selectedNode,n.id)) {
			eNew = document.getElementById("s" + this.obj + i);
			if (eNew != null) {
				eNew.className = "nodeSel";
				if (this.ArrayExist(this.deleteNode,n.id)) {
					this.deleteNode = this.ArrayDelItem(this.deleteNode,n.id);
				} else {
					if (!this.ArrayExist(this.newNode,n.id)) this.newNode.push(n.id);
				}
				this.selectedNode.push(n.id);
			}
		}
	}
	this.selectedField.value = this.selectedNode.join(",");
	this.newField.value = this.newNode.join(",");
	this.deleteField.value = this.deleteNode.join(",");
};
nTree.prototype.deselectAll = function() {
	for (var i=0; i<this.aNodes.length; i++) {
		n = this.aNodes[i];
		if (this.ArrayExist(this.selectedNode,n.id)) {
			eNew = document.getElementById("s" + this.obj + i);
			if (eNew != null) {
				eNew.className = "node";
				if (this.ArrayExist(this.newNode,n.id)) {
					this.newNode = this.ArrayDelItem(this.newNode,n.id);
				} else {
					if (!this.ArrayExist(this.deleteNode,n.id)) this.deleteNode.push(n.id);
				}
				this.selectedNode = this.ArrayDelItem(this.selectedNode,n.id);
			}
		}
	}
	this.selectedField.value = this.selectedNode.join(",");
	this.newField.value = this.newNode.join(",");
	this.deleteField.value = this.deleteNode.join(",");
};

// Outputs the tree to the page
nTree.prototype.toString = function() {
	var str = '<div class="nTree">\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;
};

// init selected nodes
nTree.prototype.init = function() {
	var nodes = this.selectedField.value.split(",");
	this.completed = false;
	for (i=0; i<nodes.length; i++) {
		this.openTo(nodes[i],true,false);
	}
	this.completed = true;
};

// Creates the tree structure
nTree.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;
};

// Creates the node icon, url and text
nTree.prototype.node = function(node, nodeId) {
	var str = '<div class="nTreeNode">' + 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');
		if (!this.readonly)
			str += '" href="#"';
		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="' + this.obj + '.s(' + nodeId + ');return false;"';
		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
nTree.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
nTree.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
nTree.prototype.getSelected = function() {
	var sn = this.getCookie('cs' + this.aNodes[0].id);
	return (sn) ? sn : null;
};

// Highlights the selected node
nTree.prototype.s = function(id) {
	if (!this.config.useSelection) return;
	var cn = this.aNodes[id];
	if (cn._hc && !this.config.folderLinks) return;
	if (!this.completed) {
		eNew = document.getElementById("s" + this.obj + id);
		eNew.className = "nodeSel";
	} else {
		//if (this.selectedNode != id) {
		if (!this.ArrayExist(this.selectedNode,cn.id)) {
			//if (this.selectedNode || this.selectedNode==0) {
			//	eOld = document.getElementById("s" + this.obj + this.selectedNode);
			//	if (eOld) eOld.className = "node";
			//}
			if (!this.multiple) {
				for (i=0; i<this.selectedNode.length; i++) {
					//eNew = document.getElementById("s" + this.obj + this.selectedNode[i]);
					//eNew.className = "node";
					if (this.deleteNode.length == 0 && !this.ArrayExist(this.newNode,this.selectedNode[i])) {
						this.deleteNode.length = 1;
						this.deleteNode[0] = this.selectedNode[i];
					}
				}
				this.deselectAll();
				this.selectedNode = [];
				this.newNode = [];
			}
			eNew = document.getElementById("s" + this.obj + id);
			eNew.className = "nodeSel";
			if (this.ArrayExist(this.deleteNode,cn.id)) {
				this.deleteNode = this.ArrayDelItem(this.deleteNode,cn.id);
			} else {
				if (!this.ArrayExist(this.newNode,cn.id)) this.newNode.push(cn.id);
			}
			//this.selectedNode = id;
			this.selectedNode.push(cn.id);
			//if (this.config.useCookies) this.setCookie('cs' + this.aNodes[0].id, cn.id);
		} else {
			if (!this.required || this.selectedNode.length >1) {
				eNew = document.getElementById("s" + this.obj + id);
				eNew.className = "node";
				if (this.ArrayExist(this.newNode,cn.id)) {
					this.newNode = this.ArrayDelItem(this.newNode,cn.id);
				} else {
					if (!this.ArrayExist(this.deleteNode,cn.id)) this.deleteNode.push(cn.id);
				}
				this.selectedNode = this.ArrayDelItem(this.selectedNode,cn.id);
			}
		}
		this.selectedField.value = this.selectedNode.join(",");
		this.newField.value = this.newNode.join(",");
		this.deleteField.value = this.deleteNode.join(",");
	}
};

// Toggle Open or close
nTree.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
nTree.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
nTree.prototype.openTo = function(nId, bSelect, bFirst) {
	var found = true;
	if (!bFirst) {
		found = false;
		for (var n=0; n<this.aNodes.length; n++) {
			if (this.aNodes[n].id == nId) {
				nId=n;
				found = true;
				break;
			}
		}
	}
	if (found) {
		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 (cn._hc) this.nodeStatus(true, cn._ai, cn._ls);
		//if (this.completed && bSelect) this.s(cn._ai);
		if (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
nTree.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
nTree.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)
nTree.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
nTree.prototype.clearCookie = function() {
	var now = new Date();
	var yesterday = new Date(now.getTime() - 1000 * 60 * 60 * 24);
	this.setCookie('co'+this.aNodes[0].id, 'cookieValue', yesterday);
	this.setCookie('cs'+this.aNodes[0].id, 'cookieValue', yesterday);
};

// [Cookie] Sets value in a cookie
nTree.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
nTree.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
nTree.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.aNodes[0].id, str);
};

// [Cookie] Checks if a node id is in a cookie
nTree.prototype.isOpen = function(id) {
	var aOpen = this.getCookie('co' + this.aNodes[0].id).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;
	}
};

/*Array.prototype.delItem = function array_delItem() {
	var item = arguments[0];
	var ni = 0;
	for(var i=0;i<this.length;i++) {
		if (this[ni] == item) {
			this.splice(ni,1);
		} else {
			ni++;
		}
	}
	return this;
}*/
nTree.prototype.ArrayDelItem = function(array,item) {
	var ni = 0;
	for(var i=0;i<array.length;i++) {
		if (array[ni] == item) {
			array.splice(ni,1);
		} else {
			ni++;
		}
	}
	return array;
}
/*Array.prototype.exist = function array_exist() {
	var item = arguments[0];
	for(var i=0;i<this.length;i++) {
		if (this[i] == item) {
			return true;
		}
	}
	return false;
}*/
nTree.prototype.ArrayExist = function(array,item) {
	for(var i=0;i<array.length;i++) {
		if (array[i] == item) {
			return true;
		}
	}
	return false;
}