/*--------------------------------------------------|
| 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                               |
|                                                   |
| Modified version by Cristiano Sumariva 16.10.2005 |
| Removed the target, folderLinks, useSelection,    |
| useStatusText and useCookies options              |
|                                                   |
| The add() method was modified to remove the link  |
| and let you insert the title for icons. Now you   |
| insert any html code in the name option           |
|                                                   |
| id Number Unique identity number.                 |
| pid Number Number refering to the parent node.    |
|     The value for the root node has to be -1.     |
| name String Text label for the node.              |
| icon String Image file to use as the icon.        |
|     Uses default if not specified.                |
| iconTitle String Text for title and alt of image  |
| iconOpen String Image file to use as the open     |
|     icon. Uses default if not specified.          |
| iconOpenTitle String Text for title and alt of    |
|     image.                                        |
| open Boolean Is the node open.                    |
|--------------------------------------------------*/



// Node object

function Node(id, pid, name, icon, iconTitle, iconOpen, iconOpenTitle, open) {

 this.id = id;
 this.pid = pid;
 this.name = name;
 this.icon = icon;
 this.iconTitle = iconTitle;
 this.iconOpen = iconOpen;
 this.iconOpenTitle = iconOpenTitle;

 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 = {

  useLines    : true,

  useIcons    : true,

  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.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, icon, iconTitle, iconOpen,
 iconOpenTitle, open) {

 this.aNodes[this.aNodes.length] = new Node(id, pid, name, icon, iconTitle,
  iconOpen, iconOpenTitle, 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>\n';

 if (document.getElementById) {
  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);
   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>' + this.indent(node, nodeId);

 if (this.config.useIcons) {
  if (!node.icon)
    node.icon = ((node._hc) ? this.icon.folder : this.icon.node);

  if (!node.iconOpen) node.iconOpen = (node._hc) ? this.icon.folderOpen : this.icon.node;

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

 str += node.name;
 str += '</div>';

 if (node._hc) {
  str += '<div id="d' + this.obj + nodeId + '" 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);

  //Check if node has child and write input control
  if (node._hc) {
   str += '<a href="javascript: ' + this.obj + '.node_state(' + nodeId +
          ');" title="';
   str += (node._io) ? ('Clique para recolher') : ('Clique para expandir');
   str += '"><img id="j' + this.obj + nodeId + '" src="';

   if (!this.config.useLines)
     str += (node._io) ? this.icon.nlMinus : this.icon.nlPlus;
   else
    if (node._io)
     if(node._ls && this.config.useLines)
      str += this.icon.minusBottom + '" alt="recolher"';
     else
      str += this.icon.minus + '" alt="recolher"';
    else
     if(node._ls && this.config.useLines)
      str += this.icon.plusBottom + '" alt="expandir"';
     else
      str += this.icon.plus + '" alt="expandir"';

   str += ' border="0"/></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;

};

// Toggle Open or close

dTree.prototype.node_state = 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);
};



// 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;

  }
 }
};



// 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;
  eIcon.title = (status) ? this.aNodes[id].iconOpenTitle :
                           this.aNodes[id].iconTitle;
 }

 if (this.config.useLines)
  if (status) {
   eJoin.title = 'Clique para recolher';
   if (bottom){
    eJoin.src = this.icon.minusBottom;
   } else {
    eJoin.src = this.icon.minus;
   }
  } else {
   eJoin.title = 'Clique para expandir';
   if (bottom){
    eJoin.src = this.icon.plusBottom;
   } else {
    eJoin.src = this.icon.plus;
   }
  }
 else
  if (status){
   eJoin.src = this.icon.nlMinus;
  } else {
   eJoin.src = this.icon.nlPlus;
  }


 eDiv.style.display = (status) ? 'block': 'none';

};

// 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;

 }

};