1 /*
<lambda>null2  * 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.keyguard.ui.viewmodel
18 
19 import com.android.systemui.dagger.SysUISingleton
20 import com.android.systemui.deviceentry.domain.interactor.DeviceEntryUdfpsInteractor
21 import com.android.systemui.keyguard.domain.interactor.FromDreamingTransitionInteractor
22 import com.android.systemui.keyguard.shared.model.Edge
23 import com.android.systemui.keyguard.shared.model.KeyguardState.AOD
24 import com.android.systemui.keyguard.shared.model.KeyguardState.DREAMING
25 import com.android.systemui.keyguard.ui.KeyguardTransitionAnimationFlow
26 import com.android.systemui.keyguard.ui.transitions.DeviceEntryIconTransition
27 import javax.inject.Inject
28 import kotlinx.coroutines.ExperimentalCoroutinesApi
29 import kotlinx.coroutines.flow.Flow
30 import kotlinx.coroutines.flow.emptyFlow
31 import kotlinx.coroutines.flow.flatMapLatest
32 
33 /** Breaks down DREAMING->AOD transition into discrete steps for corresponding views to consume. */
34 @ExperimentalCoroutinesApi
35 @SysUISingleton
36 class DreamingToAodTransitionViewModel
37 @Inject
38 constructor(
39     deviceEntryUdfpsInteractor: DeviceEntryUdfpsInteractor,
40     animationFlow: KeyguardTransitionAnimationFlow,
41 ) : DeviceEntryIconTransition {
42     private val transitionAnimation =
43         animationFlow.setup(
44             duration = FromDreamingTransitionInteractor.TO_AOD_DURATION,
45             edge = Edge.create(from = DREAMING, to = AOD),
46         )
47 
48     val deviceEntryBackgroundViewAlpha: Flow<Float> =
49         transitionAnimation.immediatelyTransitionTo(0f)
50 
51     override val deviceEntryParentViewAlpha: Flow<Float> =
52         deviceEntryUdfpsInteractor.isUdfpsEnrolledAndEnabled.flatMapLatest { udfpsEnrolledAndEnabled
53             ->
54             if (udfpsEnrolledAndEnabled) {
55                 transitionAnimation.sharedFlow(
56                     duration = FromDreamingTransitionInteractor.TO_AOD_DURATION,
57                     onStep = { it },
58                     onFinish = { 1f },
59                 )
60             } else {
61                 emptyFlow()
62             }
63         }
64 }
65