// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

part of $LIBRARYNAME;

$(ANNOTATIONS)$(NATIVESPEC)$(CLASS_MODIFIERS)class $CLASSNAME$EXTENDS$IMPLEMENTS {

  List<Gamepad$NULLABLE> getGamepads() {
    var gamepadList = _getGamepads();

    // If no prototype we need one for the world to hookup to the proper Dart class.
    var jsProto = JS('', '#.prototype', gamepadList);
    if (jsProto == null) {
      JS('', '#.prototype = Object.create(null)', gamepadList);
    }

    applyExtension('GamepadList', gamepadList);
    return gamepadList;
  }

  String get language => JS('String', '#.language || #.userLanguage', this,
      this);

  /**
   * Gets a stream (video and or audio) from the local computer.
   *
   * Use [MediaStream.supported] to check if this is supported by the current
   * platform. The arguments `audio` and `video` default to `false` (stream does
   * not use audio or video, respectively).
   *
   * Simple example usage:
   *
   *     window.navigator.getUserMedia(audio: true, video: true).then((stream) {
   *       var video = new VideoElement()
   *         ..autoplay = true
   *         ..src = Url.createObjectUrlFromStream(stream);
   *       document.body.append(video);
   *     });
   *
   * The user can also pass in Maps to the audio or video parameters to specify
   * mandatory and optional constraints for the media stream. Not passing in a
   * map, but passing in `true` will provide a MediaStream with audio or
   * video capabilities, but without any additional constraints. The particular
   * constraint names for audio and video are still in flux, but as of this
   * writing, here is an example providing more constraints.
   *
   *     window.navigator.getUserMedia(
   *         audio: true,
   *         video: {'mandatory':
   *                    { 'minAspectRatio': 1.333, 'maxAspectRatio': 1.334 },
   *                 'optional':
   *                    [{ 'minFrameRate': 60 },
   *                     { 'maxWidth': 640 }]
   *     });
   *
   * See also:
   * * [MediaStream.supported]
   */
  @SupportedBrowser(SupportedBrowser.CHROME)
  Future<MediaStream> getUserMedia({audio = false, video = false}) {
    var completer = new Completer<MediaStream>();
    var options = {
      'audio': audio,
      'video': video
    };
    _ensureGetUserMedia();
    this._getUserMedia(convertDartToNative_SerializedScriptValue(options),
      (stream) {
        completer.complete(stream);
      },
      (error) {
        completer.completeError(error);
      });
    return completer.future;
  }

  _ensureGetUserMedia() {
    if (JS('bool', '!(#.getUserMedia)', this)) {
      JS('void', '#.getUserMedia = '
          '(#.getUserMedia || #.webkitGetUserMedia || #.mozGetUserMedia ||'
          '#.msGetUserMedia)', this, this, this, this, this);
    }
  }

  @JSName('getUserMedia')
  void _getUserMedia(options, _NavigatorUserMediaSuccessCallback success,
      _NavigatorUserMediaErrorCallback error) native;

$!MEMBERS
}