/*--------------------------------------------------|
 | 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                               |
 |--------------------------------------------------*/
// 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) {

    this.config = {

        target: null,

        folderLinks: true,

        useSelection: true,

        useCookies: true,

        useLines: false,

        useIcons: false,

        useStatusText: false,

        closeSameLevel: false,

        inOrder: false

    }

    this.icon = {

        root: '/webimages/tree/base.gif',

        folder: '/webimages/tree/folder.gif',

        folderOpen: '/webimages/tree/folderopen.gif',

        node: '/webimages/tree/page.gif',

        empty: '/webimages/tree/empty.gif',

        line: '/webimages/tree/line.gif',

        join: '/webimages/tree/join.gif',

        joinBottom: '/webimages/tree/joinbottom.gif',

        plus: '/webimages/tree/plus.gif',

        plusBottom: '/webimages/tree/plusbottom.gif',

        minus: '/webimages/tree/minus.gif',

        minusBottom: '/webimages/tree/minusbottom.gif',

        nlPlus: '/webimages/tree/nolines_plus.gif',

        nlMinus: '/webimages/tree/nolines_minus.gif',

        imgfolder: '/webimages/tree/imgfolder.gif'

    };

    this.obj = objName;

    this.aNodes = [];

    this.aIndent = [];

    this.root = new Node(-1);

    this.selectedNode = null;

    this.selectedFound = false;

    this.completed = false;

    this.golbalIndex = 1;
};



// Adds a new node to the node array

dTree.prototype.add = 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

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) {
                //if (this.config.useSelection && n == this.selectedNode && !this.selectedFound) {

                cn._is = true;

                this.selectedNode = n;

                this.selectedFound = true;

            }

            str += this.node(cn, n, pNode._io);

            if (cn._ls) {
                this.golbalIndex--;
                break;
            }


        }

    }

    return str;

};

// Creates the node icon, url and text

dTree.prototype.node = function(node, nodeId, p_io) {

    var str = '<div id="node' + node.id + '" class="t' + this.golbalIndex;
    if (node.pid == '-1') {
        if (!node._hc)
            str += ' open dot';
        else
            str += ' open';
    }
    else {
        if (p_io) {
            if (!node._hc)
                str += ' open dot';
            else
                str += ' open';
        }
        else {
            if (!node._hc)
                str += ' close dot';
            else
                str += ' close';
        }
    }
    if (node.url)
        str += ((this.config.useSelection) ? ((node._is ? ' now' : '')) : '');
    str += '">';
    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) {

            /*			让Root也可以自定义图标

             node.icon = this.icon.root;

             node.iconOpen = this.icon.root;

             */

        }

        str += '<img  border=\"0\" id="i' + this.obj + node.id + '" src="' + ((node._io) ? node.iconOpen : node.icon) + '" alt="" />';

    }

    if (node.url) {

        str += '<a id="s' + this.obj + node.id + '" class="t' + this.golbalIndex;
        if (!node._hc)
            str += ' open dot';
        else
            str += ' open';
        str += ((this.config.useSelection) ? ((node._is ? ' now' : '')) : '');
        str += '" 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="' + this.obj + '.s(' + node.id + ');"';

        str += '>';

    }
    //else if ((!this.config.folderLinks || !node.url) && node._hc && node.pid != this.root.id)
    else if ((!this.config.folderLinks || !node.url) && node._hc) {

        str += '<a href="javascript: ' + this.obj + '.o(' + node.id + ');" class="t' + this.golbalIndex;
        if (node._io) {
            if (!node._hc)
                str += ' open dot';
            else
                str += ' open';
        }
        else {
            if (!node._hc)
                str += ' close dot';
            else
                str += ' close';
        }
        str += '">';
    }
    else {
        str += '<a href="javascript:void(0)" class="t' + this.golbalIndex;
        if (!node._hc)
            str += ' open dot';
        else
            str += ' open';
        str += '">';
    }

    str += node.name;

    str += '</a>';

    if (node._hc) {

        this.golbalIndex++;

        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 border=\"0\"  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 border=\"0\"  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 border=\"0\"  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 = null;
    if (window.location.href.indexOf('/directory') != -1)
        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("node"+ this.selectedNode);
     eOld.className = eOld.className.replace('now','');
     }
     eNew = document.getElementById("node"+ id);
     eNew.className+=' now';
     this.selectedNode = id;
     //if (this.config.useCookies) this.setCookie('cs' + this.obj, cn.id);
     }
     **/
    if (this.config.useCookies)
        this.setCookie('cs' + this.obj, id, undefined, '/');
};



// Toggle Open or close

dTree.prototype.o = function(id) {
    var cn = this.aNodes[0];
    for (var i = 0; i < this.aNodes.length; i++) {
        if (this.aNodes[i].id == id)
            cn = this.aNodes[i];
    }
    //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++) {
        //alert(this.aNodes[n]._hc+":"+this.aNodes[n].pid+":"+this.root.id);
        //if (this.aNodes[n]._hc && this.aNodes[n].pid != this.root.id) {
        if (this.aNodes[n]._hc && this.aNodes[n].pid != this.root.id || this.aNodes[n]._hc && this.aNodes[n].pid == -1) {

            //this.nodeStatus(status, n, this.aNodes[n]._ls)
            this.nodeStatus(status, this.aNodes[n].id, 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('node' + id);
    var parentIndex = parseInt(eDiv.className.substring(1, 2)) + 1;
    var nodeDivs = eDiv.getElementsByTagName('div');
    for (var i = 0; i < nodeDivs.length; i++) {
        if (nodeDivs[i].className.indexOf('t' + parentIndex) >= 0)
            nodeDivs[i].className = status ? nodeDivs[i].className.replace("close", "open") : nodeDivs[i].className.replace("open", "close");
    }
    var aLink = eDiv.childNodes[0];
    aLink.className = status ? aLink.className.replace("close", "open") : aLink.className.replace("open", "close");
};





// [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 (this.aNodes[n]._io && this.aNodes[n]._hc) {

            if (str)
                str += '.';

            str += this.aNodes[n].id;

        }

    }

    this.setCookie('co' + this.obj, str, undefined, '/');

};



// [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;

    }

};