1 /*
2  * Copyright (C) 2023 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.systemui.keyevent.data.repository
18 
19 import android.view.KeyEvent
20 import com.android.systemui.common.coroutine.ChannelExt.trySendWithFailureLogging
21 import com.android.systemui.common.coroutine.ConflatedCallbackFlow.conflatedCallbackFlow
22 import com.android.systemui.dagger.SysUISingleton
23 import com.android.systemui.statusbar.CommandQueue
24 import javax.inject.Inject
25 import kotlinx.coroutines.channels.awaitClose
26 import kotlinx.coroutines.flow.Flow
27 
28 /** Defines interface for classes that encapsulate application state for key event presses. */
29 interface KeyEventRepository {
30     /** Observable for whether the power button key is pressed/down or not. */
31     val isPowerButtonDown: Flow<Boolean>
32 }
33 
34 @SysUISingleton
35 class KeyEventRepositoryImpl
36 @Inject
37 constructor(
38     private val commandQueue: CommandQueue,
39 ) : KeyEventRepository {
<lambda>null40     override val isPowerButtonDown: Flow<Boolean> = conflatedCallbackFlow {
41         val callback =
42             object : CommandQueue.Callbacks {
43                 override fun handleSystemKey(event: KeyEvent) {
44                     if (event.keyCode == KeyEvent.KEYCODE_POWER) {
45                         trySendWithFailureLogging(event.isDown, TAG, "updated isPowerButtonDown")
46                     }
47                 }
48             }
49         trySendWithFailureLogging(false, TAG, "init isPowerButtonDown")
50         commandQueue.addCallback(callback)
51         awaitClose { commandQueue.removeCallback(callback) }
52     }
53 
54     companion object {
55         private const val TAG = "KeyEventRepositoryImpl"
56     }
57 }
58