1 /*
<lambda>null2  * Copyright (C) 2022 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 
18 package com.android.systemui.util.settings
19 
20 import android.annotation.UserIdInt
21 import android.database.ContentObserver
22 import com.android.systemui.common.coroutine.ConflatedCallbackFlow.conflatedCallbackFlow
23 import kotlinx.coroutines.channels.awaitClose
24 import kotlinx.coroutines.flow.Flow
25 
26 /** Kotlin extension functions for [SettingsProxy]. */
27 object SettingsProxyExt {
28 
29     /** Returns a flow of [Unit] that is invoked each time that content is updated. */
30     fun UserSettingsProxy.observerFlow(
31         @UserIdInt userId: Int,
32         vararg names: String,
33     ): Flow<Unit> {
34         return conflatedCallbackFlow {
35             val observer =
36                 object : ContentObserver(null) {
37                     override fun onChange(selfChange: Boolean) {
38                         trySend(Unit)
39                     }
40                 }
41 
42             names.forEach { name -> registerContentObserverForUserSync(name, observer, userId) }
43 
44             awaitClose { unregisterContentObserverSync(observer) }
45         }
46     }
47 
48     /** Returns a flow of [Unit] that is invoked each time that content is updated. */
49     fun SettingsProxy.observerFlow(
50         vararg names: String,
51     ): Flow<Unit> {
52         return conflatedCallbackFlow {
53             val observer =
54                 object : ContentObserver(null) {
55                     override fun onChange(selfChange: Boolean) {
56                         trySend(Unit)
57                     }
58                 }
59 
60             names.forEach { name -> registerContentObserverSync(name, observer) }
61 
62             awaitClose { unregisterContentObserverSync(observer) }
63         }
64     }
65 }
66