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/* 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 nsIPresentationControlChannel;

%{C++
#define TCP_PRESENTATION_SERVER_CONTACT_ID \
  "@mozilla.org/presentation-device/tcp-presentation-server;1"
%}

/*
 * The device information required for establishing TCP control channel.
 */
[scriptable, uuid(296fd171-e4d0-4de0-99ff-ad8ed52ddef3)]
interface nsITCPDeviceInfo: nsISupports
{
  readonly attribute AUTF8String id;
  readonly attribute AUTF8String address;
  readonly attribute uint16_t port;
};

[scriptable, uuid(09bddfaf-fcc2-4dc9-b33e-a509a1c2fb6d)]
interface nsITCPPresentationServerListener: nsISupports
{
  /**
   * Callback while the server socket changes port.
   * This event won't be cached so you should get current port after setting
   * this listener to make sure the value is updated.
   * @param   aPort
   *          The port of the server socket.
   */
  void onPortChange(in uint16_t aPort);

  /**
   * Callback while the remote host is requesting to start a presentation session.
   * @param aDeviceInfo The device information related to the remote host.
   * @param aUrl The URL requested to open by remote device.
   * @param aPresentationId The Id for representing this session.
   * @param aControlChannel The control channel for this session.
   */
  void onSessionRequest(in nsITCPDeviceInfo aDeviceInfo,
                        in DOMString aUrl,
                        in DOMString aPresentationId,
                        in nsIPresentationControlChannel aControlChannel);
};

/**
 * TCP presentation server which can be used by discovery services.
 */
[scriptable, uuid(55d6b605-2389-4aae-a8fe-60d4440540ea)]
interface nsITCPPresentationServer: nsISupports
{
  /**
   * This method initialize server socket.
   * @param   aPort
   *          The port of the server socket.  Pass 0 or opt-out to indicate no
   *          preference, and a port will be selected automatically.
   * @throws  NS_ERROR_FAILURE if the server socket has been inited or the
   *          server socket can not be inited.
   */
  void startService([optional] in uint16_t aPort);

  /**
   * Request session to designated remote TCP device.
   * @param   aDeviceInfo
   *          The remtoe device info for establish connection.
   * @param   aUrl
   *          The URL requested to open by remote device.
   * @param   aPresentationId
   *          The Id for representing this session.
   * @returns The control channel for this session.
   * @throws  NS_ERROR_FAILURE if the Id hasn't been inited.
   */
  nsIPresentationControlChannel requestSession(in nsITCPDeviceInfo aDeviceInfo,
                                               in DOMString aUrl,
                                               in DOMString aPresentationId);

  /**
   * Close server socket and call |listener.onClose(NS_OK)|
   */
  void close();

  /**
   * Get the listen port of the TCP socket, valid after |init|. 0 indicates
   * the server socket is not inited or closed.
   */
  readonly attribute uint16_t port;

  /**
   * The id of the TCP presentation server. |requestSession| won't
   * work until the |id| is set.
   */
  attribute AUTF8String id;

  /**
   * the listener for handling events of this TCP presentation server
   */
  attribute nsITCPPresentationServerListener listener;
};