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.FromLockscreenTransitionInteractor.Companion.TO_DOZING_DURATION
22 import com.android.systemui.keyguard.shared.model.Edge
23 import com.android.systemui.keyguard.shared.model.KeyguardState.DOZING
24 import com.android.systemui.keyguard.shared.model.KeyguardState.LOCKSCREEN
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.flatMapLatest
32 
33 @OptIn(ExperimentalCoroutinesApi::class)
34 @SysUISingleton
35 class LockscreenToDozingTransitionViewModel
36 @Inject
37 constructor(
38     deviceEntryUdfpsInteractor: DeviceEntryUdfpsInteractor,
39     animationFlow: KeyguardTransitionAnimationFlow,
40 ) : DeviceEntryIconTransition {
41 
42     private val transitionAnimation =
43         animationFlow.setup(
44             duration = TO_DOZING_DURATION,
45             edge = Edge.create(from = LOCKSCREEN, to = DOZING),
46         )
47 
48     val lockscreenAlpha: Flow<Float> =
49         transitionAnimation.sharedFlow(
50             duration = 250.milliseconds,
51             onStep = { 1 - it },
52             onFinish = { 1f },
53             onCancel = { 1f },
54         )
55 
56     val shortcutsAlpha: Flow<Float> =
57         transitionAnimation.sharedFlow(
58             duration = 250.milliseconds,
59             onStep = { 1 - it },
60             onFinish = { 0f },
61             onCancel = { 1f },
62         )
63 
64     val deviceEntryBackgroundViewAlpha: Flow<Float> =
65         transitionAnimation.immediatelyTransitionTo(0f)
66 
67     override val deviceEntryParentViewAlpha: Flow<Float> =
68         deviceEntryUdfpsInteractor.isUdfpsEnrolledAndEnabled.flatMapLatest {
69             isUdfpsEnrolledAndEnabled ->
70             transitionAnimation.immediatelyTransitionTo(
71                 if (isUdfpsEnrolledAndEnabled) {
72                     1f
73                 } else {
74                     0f
75                 }
76             )
77         }
78 }
79