content: /*
   * Copyright (C) 2018 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.android.server.deviceidle;
  
  import android.annotation.Nullable;
  import android.content.Context;
  import android.content.pm.PackageManager;
  import android.os.Handler;
  
  import com.android.server.DeviceIdleController;
  import com.android.server.LocalServices;
  
  /**
   * Device idle constraints for television devices.
   *
   * <p>Televisions are devices with {@code FEATURE_LEANBACK_ONLY}. Other devices might support
   * some kind of leanback mode but they should not follow the same rules for idle state.
   */
  public class TvConstraintController implements ConstraintController {
      private final Context mContext;
      private final Handler mHandler;
      private final DeviceIdleController.LocalService mDeviceIdleService;
  
      @Nullable
      private final BluetoothConstraint mBluetoothConstraint;
  
      public TvConstraintController(Context context, Handler handler) {
          mContext = context;
          mHandler = handler;
          mDeviceIdleService = LocalServices.getService(DeviceIdleController.LocalService.class);
  
          final PackageManager pm = context.getPackageManager();
          mBluetoothConstraint = pm.hasSystemFeature(PackageManager.FEATURE_BLUETOOTH)
                  ? new BluetoothConstraint(mContext, mHandler, mDeviceIdleService)
                  : null;
      }
  
      @Override
      public void start() {
          if (mBluetoothConstraint != null) {
              mDeviceIdleService.registerDeviceIdleConstraint(
                      mBluetoothConstraint, "bluetooth", IDeviceIdleConstraint.SENSING_OR_ABOVE);
          }
      }
  
      @Override
      public void stop() {
          if (mBluetoothConstraint != null) {
              mDeviceIdleService.unregisterDeviceIdleConstraint(mBluetoothConstraint);
          }
      }
  }
  