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.app.animation.Interpolators
20 import com.android.systemui.common.ui.domain.interactor.ConfigurationInteractor
21 import com.android.systemui.dagger.SysUISingleton
22 import com.android.systemui.keyguard.shared.model.Edge
23 import com.android.systemui.keyguard.shared.model.KeyguardState.DREAMING
24 import com.android.systemui.keyguard.shared.model.KeyguardState.GLANCEABLE_HUB
25 import com.android.systemui.keyguard.ui.KeyguardTransitionAnimationFlow
26 import com.android.systemui.keyguard.ui.transitions.DeviceEntryIconTransition
27 import com.android.systemui.res.R
28 import com.android.systemui.scene.shared.model.Scenes
29 import javax.inject.Inject
30 import kotlin.time.Duration.Companion.milliseconds
31 import kotlin.time.Duration.Companion.seconds
32 import kotlinx.coroutines.ExperimentalCoroutinesApi
33 import kotlinx.coroutines.flow.Flow
34 import kotlinx.coroutines.flow.flatMapLatest
35 import kotlinx.coroutines.flow.map
36 
37 @OptIn(ExperimentalCoroutinesApi::class)
38 @SysUISingleton
39 class GlanceableHubToDreamingTransitionViewModel
40 @Inject
41 constructor(
42     animationFlow: KeyguardTransitionAnimationFlow,
43     configurationInteractor: ConfigurationInteractor,
44 ) : DeviceEntryIconTransition {
45 
46     private val transitionAnimation =
47         animationFlow
48             .setup(
49                 duration = FROM_GLANCEABLE_HUB_DURATION,
50                 edge = Edge.create(from = Scenes.Communal, to = DREAMING),
51             )
52             .setupWithoutSceneContainer(
53                 edge = Edge.create(from = GLANCEABLE_HUB, to = DREAMING),
54             )
55 
56     val dreamOverlayAlpha: Flow<Float> =
57         transitionAnimation.sharedFlow(
58             duration = 167.milliseconds,
59             startTime = 167.milliseconds,
60             onStep = { it },
61             name = "GLANCEABLE_HUB->DREAMING: dreamOverlayAlpha",
62         )
63 
64     val dreamOverlayTranslationX: Flow<Float> =
65         configurationInteractor
66             .dimensionPixelSize(R.dimen.hub_to_dreaming_transition_dream_overlay_translation_x)
67             .flatMapLatest { translatePx: Int ->
68                 transitionAnimation.sharedFlow(
69                     duration = FROM_GLANCEABLE_HUB_DURATION,
70                     onStep = { value -> -translatePx + value * translatePx },
71                     interpolator = Interpolators.EMPHASIZED,
72                     onCancel = { -translatePx.toFloat() },
73                     name = "GLANCEABLE_HUB->LOCKSCREEN: dreamOverlayTranslationX"
74                 )
75             }
76 
77     // Show UMO until transition finishes.
78     val showUmo: Flow<Boolean> =
79         transitionAnimation
80             .sharedFlow(
81                 duration = FROM_GLANCEABLE_HUB_DURATION,
82                 onStep = { it },
83                 onCancel = { 0f },
84                 onFinish = { 1f },
85             )
86             .map { step -> step != 1f }
87 
88     override val deviceEntryParentViewAlpha: Flow<Float> =
89         transitionAnimation.sharedFlow(
90             duration = 167.milliseconds,
91             onStep = { 1 - it },
92             onCancel = { 1f },
93             onFinish = { 0f },
94         )
95 
96     private companion object {
97         val FROM_GLANCEABLE_HUB_DURATION = 1.seconds
98     }
99 }
100