1 /*
2  * 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.keyguard.domain.interactor.FromLockscreenTransitionInteractor.Companion.TO_DREAMING_HOSTED_DURATION
21 import com.android.systemui.keyguard.shared.model.Edge
22 import com.android.systemui.keyguard.shared.model.KeyguardState.DREAMING_LOCKSCREEN_HOSTED
23 import com.android.systemui.keyguard.shared.model.KeyguardState.LOCKSCREEN
24 import com.android.systemui.keyguard.ui.KeyguardTransitionAnimationFlow
25 import javax.inject.Inject
26 import kotlin.time.Duration.Companion.milliseconds
27 import kotlinx.coroutines.flow.Flow
28 
29 @SysUISingleton
30 class LockscreenToDreamingHostedTransitionViewModel
31 @Inject
32 constructor(
33     animationFlow: KeyguardTransitionAnimationFlow,
34 ) {
35 
36     private val transitionAnimation =
37         animationFlow.setup(
38             duration = TO_DREAMING_HOSTED_DURATION,
39             edge = Edge.create(from = LOCKSCREEN, to = DREAMING_LOCKSCREEN_HOSTED),
40         )
41 
42     val shortcutsAlpha: Flow<Float> =
43         transitionAnimation.sharedFlow(
44             duration = 250.milliseconds,
<lambda>null45             onStep = { 1 - it },
<lambda>null46             onFinish = { 0f },
<lambda>null47             onCancel = { 1f },
48         )
49 }
50