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.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.DOZING 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.flow.Flow 30 import kotlinx.coroutines.flow.emptyFlow 31 import kotlinx.coroutines.flow.flatMapLatest 32 33 /** 34 * Breaks down OCCLUDED->DOZING transition into discrete steps for corresponding views to consume. 35 */ 36 @SysUISingleton 37 class OccludedToDozingTransitionViewModel 38 @Inject 39 constructor( 40 deviceEntryUdfpsInteractor: DeviceEntryUdfpsInteractor, 41 animationFlow: KeyguardTransitionAnimationFlow, 42 ) : DeviceEntryIconTransition { 43 private val transitionAnimation = 44 animationFlow.setup( 45 duration = FromOccludedTransitionInteractor.TO_DOZING_DURATION, 46 edge = Edge.create(from = OCCLUDED, to = DOZING), 47 ) 48 49 /** Lockscreen views alpha */ 50 val lockscreenAlpha: Flow<Float> = 51 transitionAnimation.sharedFlow( 52 startTime = 233.milliseconds, 53 duration = 250.milliseconds, 54 onStep = { it }, 55 ) 56 57 val deviceEntryBackgroundViewAlpha: Flow<Float> = 58 transitionAnimation.immediatelyTransitionTo(0f) 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