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.settings.notification;
18 
19 import static android.provider.Settings.System.NOTIFICATION_LIGHT_PULSE;
20 
21 import android.content.ContentResolver;
22 import android.content.Context;
23 import android.database.ContentObserver;
24 import android.net.Uri;
25 import android.os.Handler;
26 import android.provider.Settings;
27 
28 import androidx.preference.Preference;
29 import androidx.preference.PreferenceScreen;
30 
31 import com.android.settings.R;
32 import com.android.settings.core.TogglePreferenceController;
33 import com.android.settingslib.core.lifecycle.LifecycleObserver;
34 import com.android.settingslib.core.lifecycle.events.OnPause;
35 import com.android.settingslib.core.lifecycle.events.OnResume;
36 
37 public class PulseNotificationPreferenceController extends TogglePreferenceController
38         implements LifecycleObserver, OnResume, OnPause {
39 
40     private static final int ON = 1;
41     private static final int OFF = 0;
42     private SettingObserver mSettingObserver;
43 
PulseNotificationPreferenceController(Context context, String key)44     public PulseNotificationPreferenceController(Context context, String key) {
45         super(context, key);
46     }
47 
48     @Override
displayPreference(PreferenceScreen screen)49     public void displayPreference(PreferenceScreen screen) {
50         super.displayPreference(screen);
51         Preference preference = screen.findPreference(getPreferenceKey());
52         if (preference != null) {
53             mSettingObserver = new SettingObserver(preference);
54         }
55     }
56 
57     @Override
onResume()58     public void onResume() {
59         if (mSettingObserver != null) {
60             mSettingObserver.register(mContext.getContentResolver(), true /* register */);
61         }
62     }
63 
64     @Override
onPause()65     public void onPause() {
66         if (mSettingObserver != null) {
67             mSettingObserver.register(mContext.getContentResolver(), false /* register */);
68         }
69     }
70 
71     @Override
getAvailabilityStatus()72     public int getAvailabilityStatus() {
73         return mContext.getResources().getBoolean(
74                 com.android.internal.R.bool.config_intrusiveNotificationLed) ? AVAILABLE
75                 : UNSUPPORTED_ON_DEVICE;
76     }
77 
78     @Override
isChecked()79     public boolean isChecked() {
80         return Settings.System.getInt(mContext.getContentResolver(), NOTIFICATION_LIGHT_PULSE, OFF)
81                 == ON;
82     }
83 
84     @Override
setChecked(boolean isChecked)85     public boolean setChecked(boolean isChecked) {
86         return Settings.System.putInt(mContext.getContentResolver(), NOTIFICATION_LIGHT_PULSE,
87                 isChecked ? ON : OFF);
88     }
89 
90     @Override
getSliceHighlightMenuRes()91     public int getSliceHighlightMenuRes() {
92         return R.string.menu_key_notifications;
93     }
94 
95     class SettingObserver extends ContentObserver {
96 
97         private final Uri NOTIFICATION_LIGHT_PULSE_URI =
98                 Settings.System.getUriFor(Settings.System.NOTIFICATION_LIGHT_PULSE);
99 
100         private final Preference mPreference;
101 
SettingObserver(Preference preference)102         public SettingObserver(Preference preference) {
103             super(new Handler());
104             mPreference = preference;
105         }
106 
register(ContentResolver cr, boolean register)107         public void register(ContentResolver cr, boolean register) {
108             if (register) {
109                 cr.registerContentObserver(NOTIFICATION_LIGHT_PULSE_URI, false, this);
110             } else {
111                 cr.unregisterContentObserver(this);
112             }
113         }
114 
115         @Override
onChange(boolean selfChange, Uri uri)116         public void onChange(boolean selfChange, Uri uri) {
117             super.onChange(selfChange, uri);
118             if (NOTIFICATION_LIGHT_PULSE_URI.equals(uri)) {
119                 updateState(mPreference);
120             }
121         }
122     }
123 }
124