/*--------------------------------------------------|
 | 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:true,
        useIcons:true,
        useStatusText:false,
        closeSameLevel:false,
        inOrder:false
    }
    this.icon = {
        root:'../media/com_maqmahelpdesk/images/dtree/base.gif',
        folder:'../media/com_maqmahelpdesk/images/dtree/folder.gif',
        folderOpen:'../media/com_maqmahelpdesk/images/dtree/folderopen.gif',
        node:'../media/com_maqmahelpdesk/images/dtree/page.gif',
        empty:'../media/com_maqmahelpdesk/images/dtree/empty.gif',
        line:'../media/com_maqmahelpdesk/images/dtree/line.gif',
        join:'../media/com_maqmahelpdesk/images/dtree/join.gif',
        joinBottom:'../media/com_maqmahelpdesk/images/dtree/joinbottom.gif',
        plus:'../media/com_maqmahelpdesk/images/dtree/plus.gif',
        plusBottom:'../media/com_maqmahelpdesk/images/dtree/plusbottom.gif',
        minus:'../media/com_maqmahelpdesk/images/dtree/minus.gif',
        minusBottom:'../media/com_maqmahelpdesk/images/dtree/minusbottom.gif',
        nlPlus:'../media/com_maqmahelpdesk/images/dtree/nolines_plus.gif',
        nlMinus:'../media/com_maqmahelpdesk/images/dtree/nolines_minus.gif'
    };
    this.obj = objName;
    this.aNodes = [];
    this.aIndent = [];
    this.root = new Node(-1);
    this.selectedNode = null;
    this.selectedFound = false;
    this.completed = false;
}
;

// 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) {
                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
dTree.prototype.node = function (node, nodeId) {
    var str = '<div class="dTreeNode">' + 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) {
            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="" />';
    }
    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 + ');" class="node">';
    str += node.name;
    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
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 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 = 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("s" + this.obj + this.selectedNode);
            eOld.className = "node";
        }
        eNew = document.getElementById("s" + this.obj + id);
        eNew.className = "nodeSel";
        this.selectedNode = id;
        if (this.config.useCookies) this.setCookie('cs' + this.obj, cn.id);
    }
};

// Toggle Open or close
dTree.prototype.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();
};

// Open or close all nodes
dTree.prototype.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
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('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.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
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 (str) str += '.';
            str += this.aNodes[n].id;
        }
    }
    this.setCookie('co' + this.obj, str);
};

// [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;
    }
}
;