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      1 /*
      2  * Copyright (C) 2016 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.incallui.answerproximitysensor;
     18 
     19 import android.content.Context;
     20 import android.hardware.display.DisplayManager;
     21 import android.hardware.display.DisplayManager.DisplayListener;
     22 import android.os.PowerManager;
     23 import android.support.annotation.Nullable;
     24 import android.view.Display;
     25 import com.android.dialer.common.LogUtil;
     26 
     27 /** The normal PROXIMITY_SCREEN_OFF_WAKE_LOCK provided by the OS. */
     28 public class SystemProximityWakeLock implements AnswerProximityWakeLock, DisplayListener {
     29 
     30   private static final String TAG = "SystemProximityWakeLock";
     31 
     32   private final Context context;
     33   private final PowerManager.WakeLock wakeLock;
     34 
     35   @Nullable private ScreenOnListener listener;
     36 
     37   public SystemProximityWakeLock(Context context) {
     38     this.context = context;
     39     wakeLock =
     40         context
     41             .getSystemService(PowerManager.class)
     42             .newWakeLock(PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK, TAG);
     43   }
     44 
     45   @Override
     46   public void acquire() {
     47     wakeLock.acquire();
     48     context.getSystemService(DisplayManager.class).registerDisplayListener(this, null);
     49   }
     50 
     51   @Override
     52   public void release() {
     53     wakeLock.release();
     54     context.getSystemService(DisplayManager.class).unregisterDisplayListener(this);
     55   }
     56 
     57   @Override
     58   public boolean isHeld() {
     59     return wakeLock.isHeld();
     60   }
     61 
     62   @Override
     63   public void setScreenOnListener(ScreenOnListener listener) {
     64     this.listener = listener;
     65   }
     66 
     67   @Override
     68   public void onDisplayAdded(int displayId) {}
     69 
     70   @Override
     71   public void onDisplayRemoved(int displayId) {}
     72 
     73   @Override
     74   public void onDisplayChanged(int displayId) {
     75     if (displayId == Display.DEFAULT_DISPLAY) {
     76       if (isDefaultDisplayOn(context)) {
     77         LogUtil.i("SystemProximityWakeLock.onDisplayChanged", "display turned on");
     78         if (listener != null) {
     79           listener.onScreenOn();
     80         }
     81       }
     82     }
     83   }
     84 
     85   private static boolean isDefaultDisplayOn(Context context) {
     86     Display display =
     87         context.getSystemService(DisplayManager.class).getDisplay(Display.DEFAULT_DISPLAY);
     88     return display.getState() != Display.STATE_OFF;
     89   }
     90 }
     91