/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set sw=2 ts=8 et tw=80 : */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is
 * Wellington Fernando de Macedo.
 * Portions created by the Initial Developer are Copyright (C) 2009
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *    Wellington Fernando de Macedo <wfernandom2004@gmail.com> (original author)
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
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 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "nsISupports.idl"

interface nsIDOMEventListener;
interface nsIPrincipal;
interface nsIScriptContext;
interface nsPIDOMWindow;

/**
 * The nsIWebSocket interface enables Web applications to maintain
 * bidirectional communications with server-side processes as described in:
 *
 * http://dev.w3.org/html5/websockets/
 *
 */
[scriptable, uuid(4403cd57-07fc-477f-a062-d6ba7dd0781b)]
interface nsIWebSocket : nsISupports
{
  readonly attribute DOMString url;

  //ready state
  const unsigned short CONNECTING = 0;
  const unsigned short OPEN = 1;
  const unsigned short CLOSING = 2;
  const unsigned short CLOSED = 3;
  readonly attribute unsigned short readyState;

  readonly attribute unsigned long bufferedAmount;

  // event handler attributes
  attribute nsIDOMEventListener onopen;
  attribute nsIDOMEventListener onmessage;
  attribute nsIDOMEventListener onerror;
  attribute nsIDOMEventListener onclose;

  /**
   * Transmits data using the connection.
   *
   * @param data The data to be transmited.
   * @return if the connection is still established (and the data was queued or
   *         sent successfully).
   */
  boolean send(in DOMString data);

  /**
   * Closes the Web Socket connection or connection attempt, if any.
   * If the connection is already closed, it does nothing.
   */
  void close();

  /**
   * Initialize the object for use from C++ code with the principal, script
   * context, and owner window that should be used.
   *
   * @param principal The principal to use for the request. This must not be
   *                  null.
   * @param scriptContext The script context to use for the request. May be
   *                      null.
   * @param ownerWindow The associated window for the request. May be null.
   * @param url The url for opening the socket. This must not be empty, and
   *            must have an absolute url, using either the ws or wss schemes.
   * @param protocol  Specifies a sub-protocol that the server must support for
   *                  the connection to be successful. If empty, no protocol is
   *                  specified.
   */
  [noscript] void init(in nsIPrincipal principal,
                       in nsIScriptContext scriptContext,
                       in nsPIDOMWindow ownerWindow,
                       in DOMString url,
                       in DOMString protocol);
};