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 android.util.MathUtils 20 import com.android.systemui.dagger.SysUISingleton 21 import com.android.systemui.keyguard.domain.interactor.FromLockscreenTransitionInteractor 22 import com.android.systemui.keyguard.shared.model.Edge 23 import com.android.systemui.keyguard.shared.model.KeyguardState.GONE 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.KeyguardTransitionAnimationFlow.FlowBuilder 27 import com.android.systemui.keyguard.ui.transitions.DeviceEntryIconTransition 28 import com.android.systemui.scene.shared.flag.SceneContainerFlag 29 import com.android.systemui.scene.shared.model.Scenes 30 import com.android.systemui.statusbar.SysuiStatusBarStateController 31 import javax.inject.Inject 32 import kotlin.time.Duration.Companion.milliseconds 33 import kotlinx.coroutines.flow.Flow 34 35 /** 36 * Breaks down LOCKSCREEN->GONE transition into discrete steps for corresponding views to consume. 37 */ 38 @SysUISingleton 39 class LockscreenToGoneTransitionViewModel 40 @Inject 41 constructor( 42 animationFlow: KeyguardTransitionAnimationFlow, 43 private val statusBarStateController: SysuiStatusBarStateController, 44 ) : DeviceEntryIconTransition { 45 46 private val transitionAnimation: FlowBuilder = 47 animationFlow 48 .setup( 49 duration = FromLockscreenTransitionInteractor.TO_GONE_DURATION, 50 edge = Edge.create(from = LOCKSCREEN, to = Scenes.Gone), 51 ) 52 .setupWithoutSceneContainer(edge = Edge.create(from = LOCKSCREEN, to = GONE)) 53 54 val shortcutsAlpha: Flow<Float> = 55 transitionAnimation.sharedFlow( 56 duration = 200.milliseconds, <lambda>null57 onStep = { 1 - it }, <lambda>null58 onFinish = { 0f }, <lambda>null59 onCancel = { 1f }, 60 ) 61 notificationAlphanull62 fun notificationAlpha(viewState: ViewStateAccessor): Flow<Float> { 63 var startAlpha = 1f 64 var leaveShadeOpen = false 65 val endAction: (() -> Float)? = 66 if (SceneContainerFlag.isEnabled) { 67 { 1f } 68 } else null 69 70 return transitionAnimation.sharedFlow( 71 duration = 80.milliseconds, 72 onStart = { 73 leaveShadeOpen = statusBarStateController.leaveOpenOnKeyguardHide() 74 startAlpha = viewState.alpha() 75 }, 76 onStep = { 77 if (leaveShadeOpen) { 78 1f 79 } else { 80 MathUtils.lerp(startAlpha, 0f, it) 81 } 82 }, 83 onFinish = endAction, 84 onCancel = endAction, 85 ) 86 } 87 lockscreenAlphanull88 fun lockscreenAlpha(viewState: ViewStateAccessor): Flow<Float> { 89 var startAlpha = 1f 90 return transitionAnimation.sharedFlow( 91 duration = 200.milliseconds, 92 onStart = { startAlpha = viewState.alpha() }, 93 onStep = { MathUtils.lerp(startAlpha, 0f, it) }, 94 onFinish = { 0f }, 95 onCancel = { 1f }, 96 ) 97 } 98 99 override val deviceEntryParentViewAlpha: Flow<Float> = 100 transitionAnimation.immediatelyTransitionTo(0f) 101 } 102