/* -*- Mode: javascript; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set et sw=2 ts=2: */

function createId(boardid, nodeid)
{
  return "b" + boardid + "_t" + nodeid;
}

function idFromStr(str)
{
  return str.substring(str.search('t') + 1, str.length);
}

var nodes = new Array();

function findNode(id, subscribeid)
{
    for(var i = 0; i < nodes.length; i++) {
	var node = nodes[i];
	var child = node.findNode(id, subscribeid);
	if(child != null) return child;
    }

    return null;
}

function Node(id, subscribeid)
{
    this.id = id;
    this.subscribeid = subscribeid;
    this.children = new Array();
    this.attributes = {};
    this.parent = null;

    // Elements:
    this.element = document.createElement("div");
    this.div_id = document.createElement("span");
    this.div_title = document.createElement("span");
}

Node.prototype.dump = function()
{
    alert(this.id);
}

Node.prototype.findNode = function(id, subscribeid)
{
    if(this.subscribeid != subscribeid) return null;

    if(this.id == id) return this;

    for(var i = 0; i < this.children.length; i++) {
	var node = this.children[i];
	var child = node.findNode(id, subscribeid);
	if(child != null) return child;
    }

    return null;
}

Node.prototype.addChild = function(node)
{
    if(node.parent != null) node.parent.removeChild(node);
    this.children.push(node);
    node.parent = this;
    this.element.appendChild(node.element);
}

Node.prototype.removeChild = function(node)
{
    this.children = this.children.filter(
	function(e) {
	    return e.id != node.id;
	});
    node.parent = null;
    this.element.removeChild(node.element);
}

Node.prototype.create = function()
{
    var node = this.element;

    node.name = "node";
    node.setAttribute("class", "node");
    node.setAttribute("ondblclick", "editTitle(this, event)");
    //node.setAttribute("onclick", "showHideChildren(this, event)");
    node.setAttribute("ondrop", "drop(this, event)");
    node.setAttribute("ondragover", "return false");
    node.setAttribute("draggable", true);
    node.setAttribute("ondragstart", "drag(this, event)");
    node.setAttribute("title", this.id);

    // This is a hack to make it possible to identify the nodeid and
    // oberveid from the node id alone.
    node.id = createId(this.subscribeid, this.id);

/*
    var subscribe_button = document.createElement("div");
    subscribe_button.name = "subscribe_button";
    subscribe_button.setAttribute("onclick", "subscribeMe(this, event)");
    subscribe_button.setAttribute("title", this.id);
    subscribe_button.setAttribute("style", "float: left; display: inline-box; width:14px; height: 14px; border: solid green 2px; cursor: pointer;");
    var txt_plus = document.createTextNode("+");
    subscribe_button.appendChild(txt_plus);
    node.appendChild(subscribe_button);

    var unsubscribe_button = document.createElement("div");
    unsubscribe_button.name = "unsubscribe_button";
    unsubscribe_button.setAttribute("onclick", "unsubscribeMe(this, event)");
    unsubscribe_button.setAttribute("title", this.id);
    unsubscribe_button.setAttribute("style", "float: left; display: inline-box; width:14px; height: 14px; border: solid red 2px; cursor: pointer;");
    var txt_minus = document.createTextNode("-");
    unsubscribe_button.appendChild(txt_minus);
    node.appendChild(unsubscribe_button);
*/

    this.element.appendChild(this.div_id);
    var id_txt = document.createTextNode(this.id);
    this.div_id.appendChild(id_txt);

    this.element.appendChild(this.div_title);

    this.setAttribute("title", "(missing title)");
}

Node.prototype.setAttribute = function(name, value)
{
    this.attributes[name] = value;

    if(name == "title") {
	if(this.div_title.firstChild != null) {
	    this.div_title.removeChild(this.div_title.firstChild);
	}
	var title_txt = document.createTextNode(value);
	this.div_title.appendChild(title_txt);
    }
}