dtree.js

简介：一款免费开源的内容管理系统(CMS)

/*--------------------------------------------------|
| dTree 2.05 | www.destroydrop.com/javascript/tree/ |
|---------------------------------------------------|
| Copyright (c) 2002-2003 Geir Landr?               |
|                                                   |
| This script can be used freely as long as all     |
| copyright messages are intact.                    |
|                                                   |
| Updated: 17.04.2003                               |
|--------------------------------------------------*//*
	Base path to image folder added by Andrew Eddie
	17 March 2005
*/

// 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,basePath) {
	if (!basePath) {
		basePath = 'img/';
	}	
	this.config = {		
		target			: null,		
		folderLinks		: true,		
		useSelection	: true,		
		useCookies		: true,		
		useLines		: true,		
		useIcons		: true,		
		useStatusText	: false,		
		closeSameLevel	: false,		
		inOrder			: false	
	}	
	this.icon = {		
		root			: basePath+'base.gif',		
		folder			: basePath+'folder.gif',		
		folderOpen		: basePath+'folderopen.gif',		
		node			: basePath+'square.gif',		
		empty			: basePath+'empty.gif',		
		line			: basePath+'line.gif',		
		join			: basePath+'join.gif',		
		joinBottom		: basePath+'joinbottom.gif',		
		plus			: basePath+'plus.gif',		
		plusBottom		: basePath+'plusbottom.gif',		
		minus			: basePath+'minus.gif',	
		minusBottom		: basePath+'minusbottom.gif',	
		nlPlus			: basePath+'nolines_plus.gif',	
		nlMinus			: basePath+'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) {
	// addition by Andrew Eddie, allows id=-1 for auto-indexing
	if (id < 0) {
		id = this.aNodes.length;
	}	
	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 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
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;
};

dTree.prototype.getNodeByName = function(nName) {
	var nId = 0;
	for (var n=0; n<this.aNodes.length; n++) {
		if (this.aNodes[n].name == nName) {
			nId=n;
			break;
		}
	}
	return nId;
};

dTree.prototype.getNodeByTitle = function(nTitle) {
	var nId = 0;
	for (var n=0; n<this.aNodes.length; n++) {
		if (this.aNodes[n].title == nTitle) {
			nId=n;
			break;
		}
	}
	return nId;
};

// 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;	
	}
};