1 /*
2  * Copyright (C) 2021 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.settings.display;
18 
19 import static androidx.lifecycle.Lifecycle.Event.ON_START;
20 import static androidx.lifecycle.Lifecycle.Event.ON_STOP;
21 
22 import static com.android.settings.display.SmartAutoRotateController.isRotationResolverServiceAvailable;
23 
24 import android.content.BroadcastReceiver;
25 import android.content.Context;
26 import android.content.Intent;
27 import android.content.IntentFilter;
28 import android.os.PowerManager;
29 
30 import androidx.annotation.VisibleForTesting;
31 import androidx.lifecycle.LifecycleObserver;
32 import androidx.lifecycle.OnLifecycleEvent;
33 import androidx.preference.Preference;
34 import androidx.preference.PreferenceScreen;
35 
36 import com.android.settings.R;
37 import com.android.settings.core.BasePreferenceController;
38 import com.android.settingslib.widget.BannerMessagePreference;
39 
40 /**
41  * The controller of camera based rotate battery saver warning preference. The preference appears
42  * when battery saver mode is enabled.
43  */
44 public class SmartAutoRotateBatterySaverController extends BasePreferenceController implements
45         LifecycleObserver {
46 
47     private Preference mPreference;
48     private final PowerManager mPowerManager;
49     private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
50         @Override
51         public void onReceive(Context context, Intent intent) {
52             if (mPreference == null) {
53                 return;
54             }
55             mPreference.setVisible(isAvailable());
56             updateState(mPreference);
57         }
58     };
59 
SmartAutoRotateBatterySaverController(Context context, String key)60     public SmartAutoRotateBatterySaverController(Context context, String key) {
61         super(context, key);
62         mPowerManager = context.getSystemService(PowerManager.class);
63     }
64 
65     @VisibleForTesting
isPowerSaveMode()66     boolean isPowerSaveMode() {
67         return mPowerManager.isPowerSaveMode();
68     }
69 
70     @Override
displayPreference(PreferenceScreen screen)71     public void displayPreference(PreferenceScreen screen) {
72         super.displayPreference(screen);
73         mPreference = screen.findPreference(getPreferenceKey());
74         ((BannerMessagePreference) mPreference)
75                 .setPositiveButtonText(R.string.ambient_camera_battery_saver_off)
76                 .setPositiveButtonOnClickListener(v -> {
77                     mPowerManager.setPowerSaveModeEnabled(false);
78                 });
79     }
80 
81     @OnLifecycleEvent(ON_START)
onStart()82     public void onStart() {
83         mContext.registerReceiver(mReceiver,
84                 new IntentFilter(PowerManager.ACTION_POWER_SAVE_MODE_CHANGED));
85     }
86 
87     @OnLifecycleEvent(ON_STOP)
onStop()88     public void onStop() {
89         mContext.unregisterReceiver(mReceiver);
90     }
91 
92     @Override
93     @AvailabilityStatus
getAvailabilityStatus()94     public int getAvailabilityStatus() {
95         return isRotationResolverServiceAvailable(mContext)
96                 && isPowerSaveMode() ? AVAILABLE_UNSEARCHABLE : UNSUPPORTED_ON_DEVICE;
97     }
98 }
99