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.datausage 18 19 import android.app.settings.SettingsEnums.ACTION_DATA_SAVER_MODE 20 import android.content.Context 21 import com.android.settings.R 22 import com.android.settings.contract.KEY_DATA_SAVER 23 import com.android.settings.metrics.PreferenceActionMetricsProvider 24 import com.android.settings.widget.MainSwitchBarMetadata 25 import com.android.settingslib.datastore.AbstractKeyedDataObservable 26 import com.android.settingslib.datastore.KeyValueStore 27 import com.android.settingslib.datastore.Permissions 28 import com.android.settingslib.metadata.PreferenceChangeReason 29 import com.android.settingslib.metadata.PreferenceLifecycleProvider 30 import com.android.settingslib.metadata.ReadWritePermit 31 import com.android.settingslib.metadata.SensitivityLevel 32 33 class DataSaverMainSwitchPreference : 34 MainSwitchBarMetadata, PreferenceActionMetricsProvider, PreferenceLifecycleProvider { 35 36 override val key 37 get() = KEY 38 39 override val title 40 get() = R.string.data_saver_switch_title 41 42 override val disableWidgetOnCheckedChanged: Boolean 43 get() = false 44 45 override val preferenceActionMetrics: Int 46 get() = ACTION_DATA_SAVER_MODE 47 tagsnull48 override fun tags(context: Context) = arrayOf(KEY_DATA_SAVER) 49 50 override fun storage(context: Context) = createDataStore(context) 51 52 override fun getReadPermissions(context: Context) = Permissions.EMPTY 53 54 override fun getWritePermissions(context: Context) = Permissions.EMPTY 55 56 override fun getReadPermit(context: Context, callingPid: Int, callingUid: Int) = 57 ReadWritePermit.ALLOW 58 59 override fun getWritePermit( 60 context: Context, 61 value: Boolean?, 62 callingPid: Int, 63 callingUid: Int, 64 ) = ReadWritePermit.ALLOW 65 66 override val sensitivityLevel 67 get() = SensitivityLevel.NO_SENSITIVITY 68 69 @Suppress("UNCHECKED_CAST") 70 private class DataSaverStore(private val dataSaverBackend: DataSaverBackend) : 71 AbstractKeyedDataObservable<String>(), KeyValueStore, DataSaverBackend.Listener { 72 73 override fun contains(key: String) = key == KEY 74 75 override fun <T : Any> getValue(key: String, valueType: Class<T>): T? = 76 dataSaverBackend.isDataSaverEnabled as T? 77 78 override fun <T : Any> setValue(key: String, valueType: Class<T>, value: T?) { 79 dataSaverBackend.isDataSaverEnabled = value as Boolean 80 } 81 82 override fun onFirstObserverAdded() = dataSaverBackend.addListener(this) 83 84 override fun onLastObserverRemoved() = dataSaverBackend.remListener(this) 85 86 override fun onDataSaverChanged(isDataSaving: Boolean) = 87 notifyChange(KEY, PreferenceChangeReason.VALUE) 88 } 89 90 companion object { 91 const val KEY = "use_data_saver" 92 93 /** Creates [KeyValueStore] for data saver preference. */ createDataStorenull94 fun createDataStore(context: Context): KeyValueStore = 95 DataSaverStore(DataSaverBackend(context)) 96 } 97 } 98