// wp_dtree_Node object
function wp_dtree_Node(id, pid, name, url, title, targ, count, rsspath){
    this.id = id;
    this.pid = pid;
    this.name = name;
    this.url = url;
    this.title = title;
    this.count = count; //for postcounts
    this.rsspath = rsspath; //for feed link.
    var icon, iconOpen, open; //these were originally passed as parameters, but were never used in wp-dtree.
    this.target = targ;
    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 wp_dTree(objName, baseUrl, truncate){
    this.config ={
        target          : null,
        folderLinks     : false,
        useSelection    : false,
        useCookies      : true,
        useLines        : true,
        useIcons        : true,
        useStatusText   : false,
        closeSameLevel  : false,
        inOrder         : false
    }
    this.icon ={
        root        : 'images/empty.gif',
        folder      : 'images/folder.gif',
        folderOpen  : 'images/folderopen.gif',
        node        : 'images/page.gif',
        empty       : 'images/empty.gif',
        line        : 'images/line.gif',
        join        : 'images/join.gif',
        joinBottom  : 'images/joinbottom.gif',
        plus        : 'images/plus.gif',
        plusBottom  : 'images/plusbottom.gif',
        minus       : 'images/minus.gif',
        minusBottom : 'images/minusbottom.gif',
        nlPlus      : 'images/nolines_plus.gif',
        nlMinus     : 'images/nolines_minus.gif'
    };
    this._url = baseUrl;
    this._truncate = truncate;
    this.obj = objName;
    this.awp_dtree_Nodes = [];
    this.aIndent = [];
    this.root = new wp_dtree_Node(-1);
    this.selectedwp_dtree_Node = null;
    this.selectedFound = false;
    this.completed = false;
};

// Adds a new node to the node array
wp_dTree.prototype.a = function(id, pid, title, path, link_target, count, rsspath){
    if(typeof(count) != "undefined" && count != ""){
        count = "<div id='postcount'>(" + count + ")</div>";
    }
    if(typeof(rsspath) != "undefined" && rsspath != ""){
        rsspath = "<a class='dtreerss' style='padding-right:15px' href='" + this._url + rsspath + "'>&nbsp;</a>";
    }
    name = this.htmlEntities(this.truncate(title, this._truncate));
    path += ""; //remove this and the next line breaks down for some reason.
    var url = path; //default value.
    if(!path.indexOf('http://') == 0){      //if the path doesn't start with "http://" (eg. home path)
        url = this._url + path;
    }
    this.awp_dtree_Nodes[this.awp_dtree_Nodes.length] = new wp_dtree_Node(id, pid, name, url, this.htmlEntities(title),link_target, count, rsspath);
};

wp_dTree.prototype.truncate = function(str, length){
    var length = length || 16;
    var truncation = '...';
    if(str.length > length)  {
        return str.slice(0, length - truncation.length) + truncation;
    }
    return str;
 };

wp_dTree.prototype.htmlEntities = function(str) {
    str=str.replace(/\&/g,'\&amp;');
    str=str.replace(/\"/g,'\&quot;');
    str=str.replace(/\</g,'\&lt;');
    str=str.replace(/\>/g,'\&gt;');
    return str;
}

// Open/close all nodes
wp_dTree.prototype.openAll = function(){
    this.oAll(true);
};
wp_dTree.prototype.closeAll = function(){
    this.oAll(false);
};

// Outputs the tree to the page
wp_dTree.prototype.toString = function(){
    var str = '<div id="dtree' + this.obj + '">\n';
    if(document.getElementById){
        if(this.config.useCookies) this.selectedwp_dtree_Node = this.getSelected();
        str += this.addwp_dtree_Node(this.root);
    } else str += 'Browser not supported.';
    str += '</div>';
    if(!this.selectedFound) this.selectedwp_dtree_Node = null;
    this.completed = true;
    return str;
};

// Creates the tree structure
wp_dTree.prototype.addwp_dtree_Node = function(pwp_dtree_Node){
    var str = '';
    var n=0;
    if(this.config.inOrder) n = pwp_dtree_Node._ai;
    for (n; n < this.awp_dtree_Nodes.length; n++){
        if(this.awp_dtree_Nodes[n].pid == pwp_dtree_Node.id){
            var cn = this.awp_dtree_Nodes[n];
            cn._p = pwp_dtree_Node;
            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.selectedwp_dtree_Node && !this.selectedFound){
                    cn._is = true;
                    this.selectedwp_dtree_Node = n;
                    this.selectedFound = true;
            }
            str += this.node(cn, n);
            if(cn._ls) break;
        }
    }
    return str;
};



// Creates the node icon, url and text
wp_dTree.prototype.node = function(node, nodeId){
    var str = '<div class="wp_dTreewp_dtree_Node">' + 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){
            str += '<img id="i' + this.obj + nodeId + '" src="' + ((node._io) ? node.iconOpen : node.icon) + '" alt="" />';
        }
    }
    if(this.root.id != node.pid){
        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 + ');"'
            if(true || node.title) str += ' title="' + node.title + '"';
            str += ' class="node">';
        }
        str += node.name;
        if(node.url || ((!this.config.folderLinks || !node.url) && node._hc)) str += '</a>';
    }
    if(node.count){
        str += node.count;
    }
    if(node.rsspath){
        str += node.rsspath;
    }
    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.addwp_dtree_Node(node);
        str += '</div>';
    }
    this.aIndent.pop();
    return str;
};

// Adds the empty and line icons
wp_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 ifa node has any children and ifit is the last sibling
wp_dTree.prototype.setCS = function(node){
    var lastId;
    for (var n=0; n<this.awp_dtree_Nodes.length; n++){
        if(this.awp_dtree_Nodes[n].pid == node.id) node._hc = true;
        if(this.awp_dtree_Nodes[n].pid == node.pid) lastId = this.awp_dtree_Nodes[n].id;
    }
    if(lastId==node.id) node._ls = true;
};

// Returns the selected node
wp_dTree.prototype.getSelected = function(){
    var sn = this.getCookie('cs' + this.obj);
    return (sn) ? sn : null;
};

// Highlights the selected node
wp_dTree.prototype.s = function(id){
    if(!this.config.useSelection) return;
    var cn = this.awp_dtree_Nodes[id];
    if(cn){
        if(cn._hc && !this.config.folderLinks) return;
        if(this.selectedwp_dtree_Node != id){
            if(this.selectedwp_dtree_Node || this.selectedwp_dtree_Node==0){
                eOld = document.getElementById("s" + this.obj + this.selectedwp_dtree_Node);
                eOld.className = "node";
            }
            eNew = document.getElementById("s" + this.obj + id);
            eNew.className = "nodeSel";
            this.selectedwp_dtree_Node = id;
            if(this.config.useCookies) this.setCookie('cs' + this.obj, cn.id);
        }
    }
    //else { alert('fail'); }
};

// Toggle Open or close
wp_dTree.prototype.o = function(id){     
    var cn = this.awp_dtree_Nodes[id];
    if(cn){        
        this.nodeStatus(!cn._io, id, cn._ls);
        cn._io = !cn._io;
        if(this.config.closeSameLevel) this.closeLevel(cn);
        //if(this.config.useCookies) this.updateCookie(); //hacked by PhuPM
    }
};

// Open or close all nodes
wp_dTree.prototype.oAll = function(status){
    for (var n=0; n<this.awp_dtree_Nodes.length; n++){
        if(this.awp_dtree_Nodes[n]._hc && this.awp_dtree_Nodes[n].pid != this.root.id){
            // silpstream: hack to work with scriptaculous
            if(this.awp_dtree_Nodes[n]._io != status) this.nodeStatus(status, n, this.awp_dtree_Nodes[n]._ls)
            this.awp_dtree_Nodes[n]._io = status;
        }
    }
    if(this.config.useCookies) this.updateCookie();
};

// Opens the tree to a specific node
wp_dTree.prototype.openTo = function(nId, bSelect, bFirst){
    if(!bFirst){
        for (var n=0; n<this.awp_dtree_Nodes.length; n++){
            if(this.awp_dtree_Nodes[n].id == nId){
                nId=n;
                break;
            }
        }
    }
    var cn=this.awp_dtree_Nodes[nId];
    //if(cn){
        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
wp_dTree.prototype.closeLevel = function(node){
    for (var n=0; n<this.awp_dtree_Nodes.length; n++){
        if(this.awp_dtree_Nodes[n].pid == node.pid && this.awp_dtree_Nodes[n].id != node.id && this.awp_dtree_Nodes[n]._hc){
            this.nodeStatus(false, n, this.awp_dtree_Nodes[n]._ls);
            this.awp_dtree_Nodes[n]._io = false;
            this.closeAllChildren(this.awp_dtree_Nodes[n]);
        }
    }
}

// Closes all children of a node
wp_dTree.prototype.closeAllChildren = function(node){
    for (var n=0; n<this.awp_dtree_Nodes.length; n++){
        if(this.awp_dtree_Nodes[n].pid == node.id && this.awp_dtree_Nodes[n]._hc){
            if(this.awp_dtree_Nodes[n]._io) this.nodeStatus(false, n, this.awp_dtree_Nodes[n]._ls);
            this.awp_dtree_Nodes[n]._io = false;
            this.closeAllChildren(this.awp_dtree_Nodes[n]);
        }
    }
}

// Change the status of a node(open or closed)
wp_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.awp_dtree_Nodes[id].iconOpen : this.awp_dtree_Nodes[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);
    // silpstream: hack to work with scriptaculous
    (status) ? Effect.BlindDown(eDiv,{duration:0.2}) : Effect.BlindUp(eDiv,{duration:0.2});
};


// [Cookie] Clears a cookie
wp_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
wp_dTree.prototype.setCookie = function(cookieName, cookieValue, expires, path, domain, secure){
    document.cookie =
        escape(cookieName) + '=' + escape(cookieValue)
        + (expires ? '; expires=' + expires.toGMTString() : '')
        + (path ? '; path=' + path : '; path=/')
        + (domain ? '; domain=' + domain : '')
        + (secure ? '; secure' : '');
};

// [Cookie] Gets a value from a cookie
wp_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
wp_dTree.prototype.updateCookie = function(){
    var str = '';
    for (var n=0; n<this.awp_dtree_Nodes.length; n++){
        if(this.awp_dtree_Nodes[n]._io && this.awp_dtree_Nodes[n].pid != this.root.id){
            if(str) str += '.';
            str += this.awp_dtree_Nodes[n].id;
        }
    }
    this.setCookie('co' + this.obj, str);
};

// [Cookie] Checks ifa node id is in a cookie
wp_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;
};

// ifPush 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;
    }
};