1 /*
<lambda>null2  * 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.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.FromOccludedTransitionInteractor
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.OCCLUDED
25 import com.android.systemui.keyguard.ui.KeyguardTransitionAnimationFlow
26 import com.android.systemui.keyguard.ui.transitions.DeviceEntryIconTransition
27 import javax.inject.Inject
28 import kotlin.time.Duration.Companion.milliseconds
29 import kotlinx.coroutines.ExperimentalCoroutinesApi
30 import kotlinx.coroutines.flow.Flow
31 import kotlinx.coroutines.flow.emptyFlow
32 import kotlinx.coroutines.flow.flatMapLatest
33 
34 /** Breaks down OCCLUDED->AOD transition into discrete steps for corresponding views to consume. */
35 @ExperimentalCoroutinesApi
36 @SysUISingleton
37 class OccludedToAodTransitionViewModel
38 @Inject
39 constructor(
40     deviceEntryUdfpsInteractor: DeviceEntryUdfpsInteractor,
41     animationFlow: KeyguardTransitionAnimationFlow,
42 ) : DeviceEntryIconTransition {
43     private val transitionAnimation =
44         animationFlow.setup(
45             duration = FromOccludedTransitionInteractor.TO_AOD_DURATION,
46             edge = Edge.create(from = OCCLUDED, to = AOD),
47         )
48 
49     val deviceEntryBackgroundViewAlpha: Flow<Float> =
50         transitionAnimation.immediatelyTransitionTo(0f)
51 
52     /** Lockscreen views alpha */
53     val lockscreenAlpha: Flow<Float> =
54         transitionAnimation.sharedFlow(
55             startTime = 233.milliseconds,
56             duration = 250.milliseconds,
57             onStep = { it },
58         )
59 
60     override val deviceEntryParentViewAlpha: Flow<Float> =
61         deviceEntryUdfpsInteractor.isUdfpsEnrolledAndEnabled.flatMapLatest { udfpsEnrolledAndEnabled
62             ->
63             if (udfpsEnrolledAndEnabled) {
64                 transitionAnimation.immediatelyTransitionTo(1f)
65             } else {
66                 emptyFlow()
67             }
68         }
69 }
70