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[i].indent[l] = v;
        this.childNodes[i].setIndent(l,v);
    }
}

treeItem.prototype.drawIndents = function()
{
    var oItem = this.JsItem;
    for(var i=0;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        for(var i=0;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[i].expandAll();
}

treeItem.prototype.collapseChildren = function()
{
    for(var i=0;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        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        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        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    {
        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                    {

                        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();
}