/*--------------------------------------------------|
  | dTree 2.05 | www.destroydrop.com/javascript/tree/ |
  |---------------------------------------------------|
  | Copyright (c) 2002-2003 Geir Landrö               |
  |                                                   |
  | This script can be used freely as long as all     |
  | copyright messages are intact.                    |
  |                                                   |
  | Updated: 17.04.2003                               |
  |--------------------------------------------------*/

/* The content of attribute values should be quoted properly by using the
   equivalent entities. */
function dTreeQuote(str) {
    return (str
            .replace(/\"/g, """)
            .replace(/\'/g, "'"));
}

// Node object
function Node(id, pid, name, isParent, url, dataname, datatype, title, target,
              icon, iconOpen, open, hasUnseen) {
  this.isParent = isParent;
  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.dataname = dataname;
  this.datatype = datatype;
  this.hasUnseen = hasUnseen;
  this._io = open || false;
  this._is = false;
  this._ls = false;
  this._hc = false;
  this._ai = 0;
  this._p;
};

// Tree object
function dTree(objName) {
    this.obj = objName;
    this.config = {
    target: null,
    hideRoot: false,
    folderLinks: true,
    useSelection: true,
    useCookies: false,
    useLines: true,
    useIcons: true,
    useStatusText: false,
    closeSameLevel: false,
    inOrder: false
    };
    this.icon = {
    root: 'img/base.gif',
    folder: 'img/folder.gif',
    folderOpen: 'img/folderopen.gif',
    node: 'img/page.gif',
    empty: 'img/empty.gif',
    line: 'img/line.gif',
    join: 'img/join.gif',
    joinBottom: 'img/joinbottom.gif',
    plus: 'img/plus.gif',
    plusBottom: 'img/plusbottom.gif',
    minus: 'img/minus.gif',
    minusBottom: 'img/minusbottom.gif',
    nlPlus: 'img/nolines_plus.gif',
    nlMinus: 'img/nolines_minus.gif'
    };
    this.aNodes = [];
    this.aIndent = [];
    this.root = new Node(-1);
    this.selectedNode = null;
    this.selectedFound = false;
    this.completed = false;
    
    return this;
};

dTree.prototype = {
    obj: null,
    config: null,
    icon: null,
    aNodes: null,
    aIndent: null,
    root: null,
    selectedNode: null,
    selectedFound: false,
    completed: false,

    // Adds a new node to the node array
    add: function(id, pid, name, isParent, url, datatype,
                  title, target, icon, iconOpen, open, hasUnseen) {
        this.aNodes[this.aNodes.length] = new Node(id, pid, name, isParent, url,
                                                   datatype, title, target, icon,
                                                   iconOpen, open, false, hasUnseen);
    },

    // Open/close all nodes
    openAll: function() {
        this.oAll(true);
    },
    closeAll: function() {
        this.oAll(false);
    },

    // Outputs the tree to the page
    toString: function() {
        var str = '<div class="dtree" id="' + this.obj + '">\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;
    },
    valueOf: function() {
        return this.toString();
    },

    // Creates the tree structure
    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
    node: function(node, nodeId) {
        var str = '';

        this.aNodes[nodeId] = node;
        if (this.root.id != node.pid || !this.config.hideRoot) {
            str += '<div class="dTreeNode"';
            if (node.datatype) str += ' datatype="' + dTreeQuote(node.datatype) + '"';
            if (node.dataname) str += ' dataname="' + dTreeQuote(node.dataname) + '"';
            str += '>' + this.indent(node, nodeId);
            if (node.url) {
                str += '<a id="s' + this.obj + nodeId + '" class="node" href="' + dTreeQuote(node.url) + '"';
                if (node.title) str += ' title="' + dTreeQuote(node.title) + '"';
                if (node.target) str += ' target="' + dTreeQuote(node.target) + '"';
                if (this.config.useStatusText) str += ' onmouseover="window.status=\'' + dTreeQuote(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(' + nodeId + ');"';
                str += '>';
            }
            else if ((!this.config.folderLinks || !node.url) && node._hc && node.pid != this.root.id)
                str += '<a href="#" onclick="' + this.obj + '.o(' + nodeId + ');" class="node">';
            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="" />';
            }
            str += '<span class="nodeName';
            if (!node.isParent)
                str += ' leaf';
            if (node.hasUnseen)
                str += ' unseen';
            str += '">' + node.name + '</span>';
            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
    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="#" id="tg' + this.obj + nodeId + '" onclick="return ' + 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
    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
    getSelected: function() {
        var sn = this.getCookie('cs' + this.obj);
        return (sn) ? sn : null;
    },

    // Highlights the selected node
    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.deselect();
            }
            eNew = document.getElementById("s" + this.obj + id);
            eNew.selectElement();
            this.selectedNode = id;
            if (this.config.useCookies) this.setCookie('cs' + this.obj, cn.id);
        }
    },

    // Toggle Open or close
    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();
        
        return false;
    },

    // Open or close all nodes
    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
    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
    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
    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)
    nodeStatus: function(status, id, bottom) {
        eDiv = document.getElementById('d' + this.obj + id);
        if (eDiv) {
            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
    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
    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
    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
    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
    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;
  }
};