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      1 /*
      2  * Copyright (C) 2014 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.server.telecom;
     18 
     19 import android.content.Context;
     20 import android.os.PowerManager;
     21 import android.telecom.CallState;
     22 
     23 /**
     24  * Handles acquisition and release of wake locks relating to call state.
     25  */
     26 class InCallWakeLockController extends CallsManagerListenerBase {
     27 
     28     private static final String TAG = "InCallWakeLockContoller";
     29 
     30     private final Context mContext;
     31     private final PowerManager.WakeLock mFullWakeLock;
     32     private final CallsManager mCallsManager;
     33 
     34     InCallWakeLockController(Context context, CallsManager callsManager) {
     35         mContext = context;
     36         mCallsManager = callsManager;
     37 
     38         PowerManager powerManager = (PowerManager) mContext.getSystemService(Context.POWER_SERVICE);
     39         mFullWakeLock = powerManager.newWakeLock(PowerManager.FULL_WAKE_LOCK, TAG);
     40 
     41         callsManager.addListener(this);
     42     }
     43 
     44     @Override
     45     public void onCallAdded(Call call) {
     46         handleWakeLock();
     47     }
     48 
     49     @Override
     50     public void onCallRemoved(Call call) {
     51         handleWakeLock();
     52     }
     53 
     54     @Override
     55     public void onCallStateChanged(Call call, int oldState, int newState) {
     56         handleWakeLock();
     57     }
     58 
     59     private void handleWakeLock() {
     60         // We grab a full lock as long as there exists a ringing call.
     61         Call ringingCall = mCallsManager.getRingingCall();
     62         if (ringingCall != null) {
     63             mFullWakeLock.acquire();
     64             Log.i(this, "Acquiring full wake lock");
     65         } else if (mFullWakeLock.isHeld()) {
     66             mFullWakeLock.release();
     67             Log.i(this, "Releasing full wake lock");
     68         }
     69     }
     70 }
     71