1 /* 2 * Copyright (C) 2024 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.darkmode 18 19 import android.app.UiModeManager 20 import android.content.BroadcastReceiver 21 import android.content.Context 22 import android.content.Intent 23 import android.content.IntentFilter 24 import android.content.res.Configuration 25 import android.os.PowerManager 26 import com.android.settingslib.datastore.AbstractKeyedDataObservable 27 import com.android.settingslib.datastore.KeyValueStore 28 import com.android.settingslib.metadata.PreferenceChangeReason 29 30 /** 31 * Abstract storage for dark mode settings. 32 * 33 * The underlying storage is manipulated by [UiModeManager] but we do not need to worry about the 34 * details. 35 */ 36 @Suppress("UNCHECKED_CAST") 37 internal class DarkModeStorage(private val context: Context) : 38 AbstractKeyedDataObservable<String>(), KeyValueStore { 39 private lateinit var broadcastReceiver: BroadcastReceiver 40 private lateinit var darkModeObserver: DarkModeObserver 41 containsnull42 override fun contains(key: String) = true 43 44 override fun <T : Any> getValue(key: String, valueType: Class<T>) = context.isDarkMode() as T 45 46 private fun Context.isDarkMode() = 47 (resources.configuration.uiMode and Configuration.UI_MODE_NIGHT_YES) != 0 48 49 override fun <T : Any> setValue(key: String, valueType: Class<T>, value: T?) { 50 context.getSystemService(UiModeManager::class.java)?.setNightModeActivated(value as Boolean) 51 } 52 onFirstObserverAddednull53 override fun onFirstObserverAdded() { 54 broadcastReceiver = 55 object : BroadcastReceiver() { 56 override fun onReceive(context: Context, intent: Intent) { 57 notifyChange(PreferenceChangeReason.STATE) 58 } 59 } 60 context.registerReceiver( 61 broadcastReceiver, 62 IntentFilter(PowerManager.ACTION_POWER_SAVE_MODE_CHANGED), 63 ) 64 65 darkModeObserver = DarkModeObserver(context) 66 darkModeObserver.subscribe { notifyChange(PreferenceChangeReason.VALUE) } 67 } 68 onLastObserverRemovednull69 override fun onLastObserverRemoved() { 70 context.unregisterReceiver(broadcastReceiver) 71 darkModeObserver.unsubscribe() 72 } 73 } 74