xtree.js代码_javascript技巧

//** Powered by Fason
//** Email: fason_pfx@hotmail.com

var icon={
root :'image/root.gif',
open :'image/open.png',
close :'image/close.png',
file :'image/file.png',
Rplus :'image/Rplus.gif',
Rminus :'image/Rminus.gif',
join :'image/T.gif',
joinbottom:'image/L.gif',
plus :'image/Tplus.gif',
plusbottom:'image/Lplus.gif',
minus :'image/Tminus.gif',
minusbottom:'image/Lminus.gif',
blank :'image/blank.gif',
line :'image/I.gif'
};
var Global={
id:0,
getId:function(){return this.id++;},
all:[],
selectedItem:null,
defaultText:"treeItem",
defaultAction:"javascript:void(0)",
defaultTarget:"_blank"
}
function preLoadImage(){
for(i in icon){
var tem=icon[i];
icon[i]=new Image()
icon[i].src=tem
}
};preLoadImage();

function treeItem(text,action,target,title,Icon)
{
this.id=Global.getId();
this.level=0;
this.text=text?text:Global.defaultText;
this.action=action?action:Global.defaultAction;
this.target=target?target:Global.defaultTarget;
this.title=title?title:this.text;
this.isLast=true;
this.childNodes=new Array();
this.indent=new Array();
this.parent=null;
var c =0;
if(getCookie("item"+this.id) != null) c = getCookie("item"+this.id);
this.open=parseInt(c);
this.load=false;
this.setuped=false;
this.JsItem=null;
this.container=document.createElement("div");
this.icon=Icon;
Global.all[Global.all.length]=this;
}

treeItem.prototype.toString = function()
{
var o = this;
var oItem = document.createElement("div");
oItem.id = "treeItem"+this.id
oItem.className = "treeItem";
oItem.noWrap = true;
oItem.onselectstart = function(){ return false;}
oItem.oncontextmenu = function(){ return false;}
this.JsItem = oItem;
this.drawIndents();
var iIcon = document.createElement("img");
iIcon.align = "absmiddle";
iIcon.src = this.childNodes.length>0?(this.open?(this.level>0?(this.isLast?icon.minusbottom.src:icon.minus.src):icon.Rminus.src):(this.level>0?(this.isLast?icon.plusbottom.src:icon.plus.src):icon.Rplus.src)):(this.level>0?(this.isLast?icon.joinbottom.src:icon.join.src):icon.blank.src);
iIcon.id = "treeItem-icon-handle-" + this.id;
iIcon.onclick = function(){ o.toggle();};
oItem.appendChild(iIcon);
var iIcon = document.createElement("img");
iIcon.align = "absmiddle";
iIcon.src = this.icon?this.icon:(this.childNodes.length>0?(this.open?icon.open.src:icon.close.src):icon.file.src);
iIcon.id = "treeItem-icon-folder-" + this.id;
iIcon.onclick = function(){ o.select();};
iIcon.ondblclick = function(){ o.toggle();};
oItem.appendChild(iIcon);
var eText = document.createElement("span");
var eA=document.createElement("a");
eA.innerHTML = this.text;
eA.target = this.target;
eA.href = this.action;
eA.onkeydown = function(e){ return o.KeyDown(e);}
if(this.action == Global.defaultAction) eA.onclick = function(){ o.toggle(); return false;}
eText.appendChild(eA);
eText.id = "treeItem-text-" + this.id;
eText.className = "treeItem-unselect"
eText.onclick = function(){ o.select(1);};
eText.title = this.title;
oItem.appendChild(eText);
this.container.id = "treeItem-container-"+this.id;
this.container.style.display = this.open?"":"none";
oItem.appendChild(this.container);
return oItem;
}

treeItem.prototype.root = function()
{
var p = this;
while(p.parent)
p = p.parent;
return p;
}

treeItem.prototype.setText = function(sText)
{
if(this.root().setuped)
{
var oItem = document.getElementById("treeItem-text-" + this.id);
oItem.firstChild.innerHTML = sText;
}
this.text = sText;
}

treeItem.prototype.setIndent = function(l,v)
{
for(var i=0;i<this.childNodes.length;i++)
{
this.childNodes[i].indent[l] = v;
this.childNodes[i].setIndent(l,v);
}
}

treeItem.prototype.drawIndents = function()
{
var oItem = this.JsItem;
for(var i=0;i<this.indent.length;i++){
var iIcon = document.createElement("img");
iIcon.align = "absmiddle";
iIcon.id = "treeItem-icon-" + this.id + "-" + i;
iIcon.src = this.indent[i]?icon.blank.src:icon.line.src;
oItem.appendChild(iIcon);
}
}

treeItem.prototype.add = function(oItem)
{
oItem.parent=this;
this.childNodes[this.childNodes.length]=oItem;
oItem.level=this.level+1;
oItem.indent=this.indent.concat();
oItem.indent[oItem.indent.length]=this.isLast;
if(this.childNodes.length>1){
var o=this.childNodes[this.childNodes.length-2];
o.isLast=false;
o.setIndent(o.level,0);
if(this.root().setuped)o.reload(1);
}
else if(this.root().setuped)
this.reload(0);
this.container.appendChild(oItem.toString());
this.container.style.display=this.open?"":"none";
}

treeItem.prototype.loadChildren = function()
{
//do something
}

treeItem.prototype.remove = function()
{
var tmp = this.getPreviousSibling();
//if(tmp){ tmp.select();}
this.removeChildren();
var p = this.parent;
if(!p){ return };
if(p.childNodes.length>0){
var o = p.childNodes[p.childNodes.length-1];
o.isLast = true;
o.setIndent(o.level,1);
if(o.root().setuped)o.reload(1);
}
else
p.reload();
}

treeItem.prototype.removeChildren = function ()
{
if(this == Global.selectedItem){ Global.selectedItem = null;}
for(var i=this.childNodes.length-1;i>=0;i--)
this.childNodes[i].removeChildren();
var o = this;
var p = this.parent;
if (p) { p.childNodes = p.childNodes._remove(o);}
Global.all[this.id] = null
var oItem = document.getElementById("treeItem"+this.id);
if (oItem) { oItem.parentNode.removeChild(oItem); }
}

treeItem.prototype.reload = function(flag)
{
if (flag){
for(var j=0;j<this.childNodes.length;j++){ this.childNodes[j].reload(1);}
for(var i=0;i<this.indent.length;i++)
document.getElementById("treeItem-icon-" +this.id+ "-"+i).src = this.indent[i]?icon.blank.src:icon.line.src;
}
document.getElementById("treeItem-icon-handle-" +this.id).src = this.childNodes.length>0?(this.open?(this.level>0?(this.isLast?icon.minusbottom.src:icon.minus.src):icon.Rminus.src):(this.level>0?(this.isLast?icon.plusbottom.src:icon.plus.src):icon.Rplus.src)):(this.level>0?(this.isLast?icon.joinbottom.src:icon.join.src):icon.blank.src);
if (!this.icon)
document.getElementById("treeItem-icon-folder-"+this.id).src = this.childNodes.length>0?(this.open?icon.open.src:icon.close.src):icon.file.src;
}

treeItem.prototype.toggle = function()
{
if(this.childNodes.length>0){
if(this.open)
this.collapse();
else
this.expand();
}
}

treeItem.prototype.expand = function()
{
this.open=1;
setCookie("item"+this.id,1);
if(!this.load){
this.load=true;
this.loadChildren();
this.reload(1);
}
else
this.reload(0);
this.container.style.display = "";
}

treeItem.prototype.collapse = function()
{
this.open=0;
setCookie("item"+this.id,0);
this.container.style.display = "none";
this.reload(0);
this.select(1);
}

treeItem.prototype.expandAll = function()
{
if(this.childNodes.length>0 && !this.open)this.expand();
this.expandChildren();
}

treeItem.prototype.collapseAll = function()
{
this.collapseChildren();
if(this.childNodes.length>0 && this.open)this.collapse();
}

treeItem.prototype.expandChildren = function()
{
for(var i=0;i<this.childNodes.length;i++)
this.childNodes[i].expandAll();
}

treeItem.prototype.collapseChildren = function()
{
for(var i=0;i<this.childNodes.length;i++)
this.childNodes[i].collapseAll()
}

treeItem.prototype.openURL=function()
{
if(this.action!=Global.defaultAction){
window.open(this.action,this.target);
}
}

treeItem.prototype.select=function(o)
{
if (Global.selectedItem) Global.selectedItem.unselect();
var oItem = document.getElementById("treeItem-text-" + this.id);
oItem.className = "treeItem-selected";
oItem.firstChild.focus();
Global.selectedItem = this;
if(!o) this.openURL();
}

treeItem.prototype.unselect=function()
{
var oItem = document.getElementById("treeItem-text-" + this.id);
oItem.className = "treeItem-unselect";
oItem.firstChild.blur();
Global.selectedItem = null;
}

treeItem.prototype.setup = function(oTaget)
{
oTaget.appendChild(this.toString());
this.setuped = true;
if(this.childNodes.length>0 || this.open) this.expand();
}

/**********************************************/
/*
Arrow Key Event
*/
/**********************************************/

treeItem.prototype.getFirstChild = function()
{
if(this.childNodes.length>0 && this.open)
return this.childNodes[0];
return this;
}

treeItem.prototype.getLastChild = function()
{
if(this.childNodes.length>0 && this.open)
return this.childNodes[this.childNodes.length-1].getLastChild();
return this;
}

treeItem.prototype.getPreviousSibling = function()
{
if(!this.parent) return null;
for(var i=0;i<this.parent.childNodes.length;i++)
if(this.parent.childNodes[i] == this)break;
if(i == 0)
return this.parent;
else
return this.parent.childNodes[i-1].getLastChild();
}

treeItem.prototype.getNextSibling = function()
{
if(!this.parent) return null;
for(var i=0;i<this.parent.childNodes.length;i++)
if(this.parent.childNodes[i] == this)break;
if(i == this.parent.childNodes.length-1)
return this.parent.getNextSibling();
else
return this.parent.childNodes[i+1];
}

treeItem.prototype.KeyDown=function(e){
var code,o;
if(!e) e = window.event;
code = e.which ? e.which : e.keyCode;
o = this;
if(code == 37)
{
if(o.open) o.collapse();
else
{
if(o.parent) o.parent.select();
}
return false;
}
else if(code == 38)
{
var tmp = o.getPreviousSibling();
if(tmp) tmp.select();
return false;
}
else if(code == 39)
{
if(o.childNodes.length>0)
{
if(!o.open) o.expand();
else
{
var tmp = o.getFirstChild();
if(tmp) tmp.select();
}
}
return false;
}
else if(code == 40)
{
if(o.open&&o.childNodes.length>0)o.getFirstChild().select();
else
{
var tmp = o.getNextSibling();
if(tmp) tmp.select();
}
return false;
}
else if(code == 13)
{
o.toggle();
o.openURL();
return false;
}
return true;
}
/*****************************************************/
Array.prototype.indexOf=function(o){
for(var i=0;i<this.length;i++)
if(this[i]==o)return i;
return -1;
}

Array.prototype.removeAt=function(i){
return this.slice(0,i).concat(this.slice(i+1))
}

Array.prototype._remove=function(o){
var i=this.indexOf(o);
if(i!= -1) return this.removeAt(i)
return this
}
/*****************************************************/

/*****************************************************/
/*
xtreeItem Class
*/
/*****************************************************/

function xtreeItem(uid,text,action,target,title,Icon,xml){
this.uid=uid;
this.base=treeItem;
this.base(text,action,target,title,Icon);
this.Xml=xml;
}
xtreeItem.prototype=new treeItem;

xtreeItem.prototype.parseElement=function(dom){
return dom.selectSingleNode("/TreeNode");
}

xtreeItem.prototype.addNodesLoop = function(oItem)
{
for(var i=0;i<oItem.childNodes.length;i++)
{
var o = oItem.childNodes[i];
var tmp = new xtreeItem(o.getAttribute("id"),o.getAttribute("text"),o.getAttribute("href"),o.getAttribute("target"),o.getAttribute("title"),o.getAttribute("icon"),o.getAttribute('Xml'));
this.add(tmp);
if(o.getAttribute("Xml")) tmp.add(new treeItem("Loading..."));
else
{
tmp.load=true;
tmp.addNodesLoop(o);
}
}
}

xtreeItem.prototype.loadChildren=function()
{
var oItem = this;
var oLoad = oItem.childNodes[0];
var XmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
XmlHttp.onreadystatechange=function(){
if(XmlHttp.readyState==4){
if(XmlHttp.status==200){
if(XmlHttp.responseXML.xml == ""){ oLoad.setText("unavaible1");return;}
var XmlItem=oItem.parseElement(XmlHttp.responseXML.documentElement);
if(XmlItem.childNodes.length == 0){ oLoad.setText("unavaible") }
else
{
oItem.addNodesLoop(XmlItem);
for(var i=0;i<oItem.childNodes.length;i++)
{

if(parseInt(getCookie("item"+oItem.childNodes[i].id)) ==1)
{ oItem.childNodes[i].expand();}
}
if(Global.selectedItem == oItem.childNodes[0])oItem.select();
oLoad.remove();
}
}
else{
oLoad.setText("unavaible");
}
XmlHttp = null;
oItem.select(1);
}
}
try{
XmlHttp.open("get",this.Xml+(/\?/g.test(this.Xml)?"&":"?")+"temp="+Math.random(),true);
XmlHttp.send();
}catch(e){ oLoad.setText("unavaible");}
}
xtreeItem.prototype.setup=function(oTarget){
this.add(new treeItem("Loading..."));
oTarget.appendChild(this.toString());
this.setuped=true;
if(this.childNodes.length>0 || this.open) this.expand();
}
/*****************************************************/
function setCookie(name,value)
{
var Days = 7;
var exp = new Date();
exp.setTime(exp.getTime() + Days*24*60*60*1000);
document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString();
}
function getCookie(name)
{
var arr = document.cookie.match(new RegExp("(^| )"+name+"=([^;]*)(;|$)"));
if(arr != null) return unescape(arr[2]); return null;
}
function delCookie(name)
{
var exp = new Date();
exp.setTime(exp.getTime() - 1);
var cval=getCookie(name);
if(cval!=null) document.cookie= name + "="+cval+";expires="+exp.toGMTString();
}