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.statusbar.ui
18 
19 import com.android.internal.policy.SystemBarUtils
20 import com.android.systemui.dagger.qualifiers.Background
21 import com.android.systemui.dagger.qualifiers.Main
22 import com.android.systemui.statusbar.policy.ConfigurationController
23 import com.android.systemui.statusbar.policy.onConfigChanged
24 import javax.inject.Inject
25 import kotlin.coroutines.CoroutineContext
26 import kotlinx.coroutines.flow.Flow
27 import kotlinx.coroutines.flow.conflate
28 import kotlinx.coroutines.flow.distinctUntilChanged
29 import kotlinx.coroutines.flow.flowOn
30 import kotlinx.coroutines.flow.map
31 import kotlinx.coroutines.flow.onStart
32 
33 /**
34  * Tracks state from [SystemBarUtils]. Using this is both more efficient and more testable than
35  * using [SystemBarUtils] directly.
36  */
37 class SystemBarUtilsState
38 @Inject
39 constructor(
40     @Background bgContext: CoroutineContext,
41     @Main mainContext: CoroutineContext,
42     configurationController: ConfigurationController,
43     proxy: SystemBarUtilsProxy,
44 ) {
45     /** @see SystemBarUtils.getStatusBarHeight */
46     val statusBarHeight: Flow<Int> =
47         configurationController.onConfigChanged
<lambda>null48             .onStart<Any> { emit(Unit) }
49             .flowOn(mainContext)
50             .conflate()
<lambda>null51             .map { proxy.getStatusBarHeight() }
52             .distinctUntilChanged()
53             .flowOn(bgContext)
54             .conflate()
55 
56     val statusBarHeaderHeightKeyguard: Flow<Int> =
57         configurationController.onConfigChanged
<lambda>null58             .onStart<Any> { emit(Unit) }
59             .flowOn(mainContext)
60             .conflate()
<lambda>null61             .map { proxy.getStatusBarHeaderHeightKeyguard() }
62             .distinctUntilChanged()
63             .flowOn(bgContext)
64             .conflate()
65 }
66