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.systemui.shade.ui.viewmodel
18 
19 import com.android.compose.animation.scene.SceneKey
20 import com.android.systemui.dagger.SysUISingleton
21 import com.android.systemui.dagger.qualifiers.Application
22 import com.android.systemui.scene.domain.interactor.SceneInteractor
23 import com.android.systemui.scene.shared.model.SceneFamilies
24 import com.android.systemui.scene.shared.model.Scenes
25 import javax.inject.Inject
26 import kotlinx.coroutines.CoroutineScope
27 import kotlinx.coroutines.flow.SharingStarted
28 import kotlinx.coroutines.flow.StateFlow
29 import kotlinx.coroutines.flow.stateIn
30 
31 /**
32  * Models UI state and handles user input for the overlay shade UI, which shows a shade as an
33  * overlay on top of another scene UI.
34  */
35 @SysUISingleton
36 class OverlayShadeViewModel
37 @Inject
38 constructor(
39     @Application applicationScope: CoroutineScope,
40     private val sceneInteractor: SceneInteractor,
41 ) {
42     /** The scene to show in the background when the overlay shade is open. */
43     val backgroundScene: StateFlow<SceneKey> =
44         sceneInteractor
45             .resolveSceneFamily(SceneFamilies.Home)
46             .stateIn(
47                 scope = applicationScope,
48                 started = SharingStarted.WhileSubscribed(),
49                 initialValue = Scenes.Lockscreen,
50             )
51 
52     /** Notifies that the user has clicked the semi-transparent background scrim. */
onScrimClickednull53     fun onScrimClicked() {
54         sceneInteractor.changeScene(
55             toScene = SceneFamilies.Home,
56             loggingReason = "Shade scrim clicked",
57         )
58     }
59 }
60