content: /*
   * Copyright (C) 2017 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 android.hardware.sidekick;
  
  
  /**
   * Sidekick local system service interface.
   *
   * @hide Only for use within the system server, and maybe by Clockwork Home.
   */
  public abstract class SidekickInternal {
  
      /**
       * Tell Sidekick to reset back to newly-powered-on state.
       *
       * @return true on success (Sidekick is reset), false if Sidekick is not
       * available (failed or not present). Either way, upon return Sidekick is
       * guaranteed not to be controlling the display.
       */
      public abstract boolean reset();
  
      /**
       * Tell Sidekick it can start controlling the display.
       *
       * SidekickServer may choose not to actually control the display, if it's been told
       * via other channels to leave the previous image on the display (same as SUSPEND in
       * a non-Sidekick system).
       *
       * @param displayState - one of Display.STATE_DOZE_SUSPEND, Display.STATE_ON_SUSPEND
       * @return true on success, false on failure (no sidekick available)
       */
      public abstract boolean startDisplayControl(int displayState);
  
      /**
       * Tell Sidekick it must stop controlling the display.
       *
       * No return code because this must always succeed - after return, Sidekick
       * is guaranteed to not be controlling the display.
       */
      public abstract void endDisplayControl();
  
  }
  