/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set sw=2 ts=8 et tw=80 : */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "nsISupports.idl"

interface nsIDOMEventListener;
interface nsIPrincipal;
interface nsIScriptContext;
interface nsPIDOMWindow;
interface nsIDOMDOMStringList;
interface nsIVariant;

%{C++
#include "nsTArray.h"
class nsString;
%}
[ref] native nsStringTArrayRef(nsTArray<nsString>);

/**
 * 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(e59c8c65-df29-485c-a00b-8fac3dc1573a)]
interface nsIWebSocket : nsISupports
{
  readonly attribute DOMString url;
  readonly attribute DOMString extensions;
  readonly attribute DOMString protocol;

  //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;

  // "blob" by default: can set to "blob" or "arraybuffer": setting to other
  // values will throw SYNTAX_ERR exception.
  attribute DOMString binaryType;

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

  /**
   * Transmits data to other end of the connection.
   * @param data The data to be transmitted.  Arraybuffers and Blobs are sent as
   * binary data.  Strings are sent as UTF-8 text data.  Other types are
   * converted to a String and sent as a String.
   * @return if the connection is still established and the data was queued or
   *         sent successfully.
   */
  [implicit_jscontext] void send(in nsIVariant data);

  /**
   * Closes the Web Socket connection or connection attempt, if any.
   * If the connection is already closed, it does nothing.
   */
  [optional_argc] void close([optional] in unsigned short code,
                             [optional] in DOMString reason);

  /**
   * 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 array of sub-protocols acceptable to the client.
   *                  If the length of the array is at least one, the server
   *                  must select one of the listed sub-protocols for the
   *                  connection to be successful. If empty, no sub-protocol is
   *                  specified. The server selected sub-protocol can be read
   *                  from the protocol attribute after connection.
   */
  [noscript] void init(in nsIPrincipal principal,
                       in nsIScriptContext scriptContext,
                       in nsPIDOMWindow ownerWindow,
                       in DOMString url,
                       in nsStringTArrayRef protocol);
};