Merge changes I72c43c93,I254d2130 into tm-qpr-dev am: 5f3bb10877 am: 04e01a73f0

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21142718 Change-Id: I98c06ffbaa763e86b1338fadede46b1f619676f9 Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
2023-01-31 17:15:26 +00:00
parent fb399b7d33 04e01a73f0
commit e1dcdf2e50
16 changed files with 539 additions and 452 deletions
--- a/packages/SystemUI/src/com/android/systemui/keyguard/domain/interactor/FromDozingTransitionInteractor.kt
+++ b/packages/SystemUI/src/com/android/systemui/keyguard/domain/interactor/FromDozingTransitionInteractor.kt
@@ -21,6 +21,7 @@ import com.android.systemui.animation.Interpolators
 import com.android.systemui.dagger.SysUISingleton
 import com.android.systemui.dagger.qualifiers.Application
 import com.android.systemui.keyguard.data.repository.KeyguardTransitionRepository
+import com.android.systemui.keyguard.shared.model.BiometricUnlockModel.Companion.isWakeAndUnlock
 import com.android.systemui.keyguard.shared.model.KeyguardState
 import com.android.systemui.keyguard.shared.model.TransitionInfo
 import com.android.systemui.keyguard.shared.model.WakefulnessModel.Companion.isWakingOrStartingToWake
@@ -44,6 +45,7 @@ constructor(

    override fun start() {
        listenForDozingToLockscreen()
+        listenForDozingToGone()
    }

    private fun listenForDozingToLockscreen() {
@@ -68,6 +70,28 @@ constructor(
        }
    }

+    private fun listenForDozingToGone() {
+        scope.launch {
+            keyguardInteractor.biometricUnlockState
+                .sample(keyguardTransitionInteractor.startedKeyguardTransitionStep, ::Pair)
+                .collect { (biometricUnlockState, lastStartedTransition) ->
+                    if (
+                        lastStartedTransition.to == KeyguardState.DOZING &&
+                            isWakeAndUnlock(biometricUnlockState)
+                    ) {
+                        keyguardTransitionRepository.startTransition(
+                            TransitionInfo(
+                                name,
+                                KeyguardState.DOZING,
+                                KeyguardState.GONE,
+                                getAnimator(),
+                            )
+                        )
+                    }
+                }
+        }
+    }
+
    private fun getAnimator(duration: Duration = DEFAULT_DURATION): ValueAnimator {
        return ValueAnimator().apply {
            setInterpolator(Interpolators.LINEAR)
--- a/packages/SystemUI/src/com/android/systemui/keyguard/domain/interactor/KeyguardTransitionInteractor.kt
+++ b/packages/SystemUI/src/com/android/systemui/keyguard/domain/interactor/KeyguardTransitionInteractor.kt
@@ -19,7 +19,6 @@ package com.android.systemui.keyguard.domain.interactor

 import com.android.systemui.dagger.SysUISingleton
 import com.android.systemui.keyguard.data.repository.KeyguardTransitionRepository
-import com.android.systemui.keyguard.shared.model.AnimationParams
 import com.android.systemui.keyguard.shared.model.KeyguardState
 import com.android.systemui.keyguard.shared.model.KeyguardState.AOD
 import com.android.systemui.keyguard.shared.model.KeyguardState.BOUNCER
@@ -31,9 +30,6 @@ import com.android.systemui.keyguard.shared.model.TransitionState
 import com.android.systemui.keyguard.shared.model.TransitionState.STARTED
 import com.android.systemui.keyguard.shared.model.TransitionStep
 import javax.inject.Inject
-import kotlin.math.max
-import kotlin.math.min
-import kotlin.time.Duration
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.filter
 import kotlinx.coroutines.flow.map
@@ -104,38 +100,4 @@ constructor(
    /* The last completed [KeyguardState] transition */
    val finishedKeyguardState: Flow<KeyguardState> =
        finishedKeyguardTransitionStep.map { step -> step.to }
-
-    /**
-     * Transitions will occur over a [totalDuration] with [TransitionStep]s being emitted in the
-     * range of [0, 1]. View animations should begin and end within a subset of this range. This
-     * function maps the [startTime] and [duration] into [0, 1], when this subset is valid.
-     */
-    fun transitionStepAnimation(
-        flow: Flow<TransitionStep>,
-        params: AnimationParams,
-        totalDuration: Duration,
-    ): Flow<Float> {
-        val start = (params.startTime / totalDuration).toFloat()
-        val chunks = (totalDuration / params.duration).toFloat()
-        var isRunning = false
-        return flow
-            .map { step ->
-                val value = (step.value - start) * chunks
-                if (step.transitionState == STARTED) {
-                    // When starting, make sure to always emit. If a transition is started from the
-                    // middle, it is possible this animation is being skipped but we need to inform
-                    // the ViewModels of the last update
-                    isRunning = true
-                    max(0f, min(1f, value))
-                } else if (isRunning && value >= 1f) {
-                    // Always send a final value of 1. Because of rounding, [value] may never be
-                    // exactly 1.
-                    isRunning = false
-                    1f
-                } else {
-                    value
-                }
-            }
-            .filter { value -> value >= 0f && value <= 1f }
-    }
 }
--- a/packages/SystemUI/src/com/android/systemui/keyguard/shared/model/AnimationParams.kt
+++ b/packages/SystemUI/src/com/android/systemui/keyguard/shared/model/AnimationParams.kt
@@ -1,25 +0,0 @@
-/*
- * Copyright (C) 2022 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License
- */
-package com.android.systemui.keyguard.shared.model
-
-import kotlin.time.Duration
-import kotlin.time.Duration.Companion.milliseconds
-
-/** Animation parameters */
-data class AnimationParams(
-    val startTime: Duration = 0.milliseconds,
-    val duration: Duration,
-)
--- a/packages/SystemUI/src/com/android/systemui/keyguard/ui/KeyguardTransitionAnimationFlow.kt
+++ b/packages/SystemUI/src/com/android/systemui/keyguard/ui/KeyguardTransitionAnimationFlow.kt
@@ -0,0 +1,106 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+package com.android.systemui.keyguard.ui
+
+import android.view.animation.Interpolator
+import com.android.systemui.animation.Interpolators.LINEAR
+import com.android.systemui.keyguard.shared.model.TransitionState.CANCELED
+import com.android.systemui.keyguard.shared.model.TransitionState.FINISHED
+import com.android.systemui.keyguard.shared.model.TransitionState.RUNNING
+import com.android.systemui.keyguard.shared.model.TransitionState.STARTED
+import com.android.systemui.keyguard.shared.model.TransitionStep
+import kotlin.math.max
+import kotlin.math.min
+import kotlin.time.Duration
+import kotlin.time.Duration.Companion.milliseconds
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.filterNotNull
+import kotlinx.coroutines.flow.map
+
+/**
+ * For the given transition params, construct a flow using [createFlow] for the specified portion of
+ * the overall transition.
+ */
+class KeyguardTransitionAnimationFlow(
+    private val transitionDuration: Duration,
+    private val transitionFlow: Flow<TransitionStep>,
+) {
+    /**
+     * Transitions will occur over a [transitionDuration] with [TransitionStep]s being emitted in
+     * the range of [0, 1]. View animations should begin and end within a subset of this range. This
+     * function maps the [startTime] and [duration] into [0, 1], when this subset is valid.
+     */
+    fun createFlow(
+        duration: Duration,
+        onStep: (Float) -> Float,
+        startTime: Duration = 0.milliseconds,
+        onCancel: (() -> Float)? = null,
+        onFinish: (() -> Float)? = null,
+        interpolator: Interpolator = LINEAR,
+    ): Flow<Float> {
+        if (!duration.isPositive()) {
+            throw IllegalArgumentException("duration must be a positive number: $duration")
+        }
+        if ((startTime + duration).compareTo(transitionDuration) > 0) {
+            throw IllegalArgumentException(
+                "startTime($startTime) + duration($duration) must be" +
+                    " <= transitionDuration($transitionDuration)"
+            )
+        }
+
+        val start = (startTime / transitionDuration).toFloat()
+        val chunks = (transitionDuration / duration).toFloat()
+        var isComplete = true
+
+        fun stepToValue(step: TransitionStep): Float? {
+            val value = (step.value - start) * chunks
+            return when (step.transitionState) {
+                // When starting, make sure to always emit. If a transition is started from the
+                // middle, it is possible this animation is being skipped but we need to inform
+                // the ViewModels of the last update
+                STARTED -> {
+                    isComplete = false
+                    max(0f, min(1f, value))
+                }
+                // Always send a final value of 1. Because of rounding, [value] may never be
+                // exactly 1.
+                RUNNING ->
+                    if (isComplete) {
+                        null
+                    } else if (value >= 1f) {
+                        isComplete = true
+                        1f
+                    } else if (value >= 0f) {
+                        value
+                    } else {
+                        null
+                    }
+                else -> null
+            }?.let { onStep(interpolator.getInterpolation(it)) }
+        }
+
+        return transitionFlow
+            .map { step ->
+                when (step.transitionState) {
+                    STARTED -> stepToValue(step)
+                    RUNNING -> stepToValue(step)
+                    CANCELED -> onCancel?.invoke()
+                    FINISHED -> onFinish?.invoke()
+                }
+            }
+            .filterNotNull()
+    }
+}
--- a/packages/SystemUI/src/com/android/systemui/keyguard/ui/viewmodel/DreamingToLockscreenTransitionViewModel.kt
+++ b/packages/SystemUI/src/com/android/systemui/keyguard/ui/viewmodel/DreamingToLockscreenTransitionViewModel.kt
@@ -21,15 +21,10 @@ import com.android.systemui.animation.Interpolators.EMPHASIZED_DECELERATE
 import com.android.systemui.dagger.SysUISingleton
 import com.android.systemui.keyguard.domain.interactor.FromDreamingTransitionInteractor.Companion.TO_LOCKSCREEN_DURATION
 import com.android.systemui.keyguard.domain.interactor.KeyguardTransitionInteractor
-import com.android.systemui.keyguard.shared.model.AnimationParams
-import com.android.systemui.keyguard.shared.model.TransitionState.CANCELED
-import com.android.systemui.keyguard.shared.model.TransitionState.FINISHED
+import com.android.systemui.keyguard.ui.KeyguardTransitionAnimationFlow
 import javax.inject.Inject
 import kotlin.time.Duration.Companion.milliseconds
 import kotlinx.coroutines.flow.Flow
-import kotlinx.coroutines.flow.filter
-import kotlinx.coroutines.flow.map
-import kotlinx.coroutines.flow.merge

 /**
 * Breaks down DREAMING->LOCKSCREEN transition into discrete steps for corresponding views to
@@ -41,39 +36,46 @@ class DreamingToLockscreenTransitionViewModel
 constructor(
    private val interactor: KeyguardTransitionInteractor,
 ) {
+    private val transitionAnimation =
+        KeyguardTransitionAnimationFlow(
+            transitionDuration = TO_LOCKSCREEN_DURATION,
+            transitionFlow = interactor.dreamingToLockscreenTransition,
+        )

    /** Dream overlay y-translation on exit */
    fun dreamOverlayTranslationY(translatePx: Int): Flow<Float> {
-        return flowForAnimation(DREAM_OVERLAY_TRANSLATION_Y).map { value ->
-            EMPHASIZED_ACCELERATE.getInterpolation(value) * translatePx
-        }
+        return transitionAnimation.createFlow(
+            duration = 600.milliseconds,
+            onStep = { it * translatePx },
+            interpolator = EMPHASIZED_ACCELERATE,
+        )
    }
    /** Dream overlay views alpha - fade out */
-    val dreamOverlayAlpha: Flow<Float> = flowForAnimation(DREAM_OVERLAY_ALPHA).map { 1f - it }
+    val dreamOverlayAlpha: Flow<Float> =
+        transitionAnimation.createFlow(
+            duration = 250.milliseconds,
+            onStep = { 1f - it },
+        )

    /** Lockscreen views y-translation */
    fun lockscreenTranslationY(translatePx: Int): Flow<Float> {
-        return merge(
-            flowForAnimation(LOCKSCREEN_TRANSLATION_Y).map { value ->
-                -translatePx + (EMPHASIZED_DECELERATE.getInterpolation(value) * translatePx)
-            },
-            // On end, reset the translation to 0
-            interactor.dreamingToLockscreenTransition
-                .filter { it.transitionState == FINISHED || it.transitionState == CANCELED }
-                .map { 0f }
+        return transitionAnimation.createFlow(
+            duration = TO_LOCKSCREEN_DURATION,
+            onStep = { value -> -translatePx + value * translatePx },
+            // Reset on cancel or finish
+            onFinish = { 0f },
+            onCancel = { 0f },
+            interpolator = EMPHASIZED_DECELERATE,
        )
    }

    /** Lockscreen views alpha */
-    val lockscreenAlpha: Flow<Float> = flowForAnimation(LOCKSCREEN_ALPHA)
-
-    private fun flowForAnimation(params: AnimationParams): Flow<Float> {
-        return interactor.transitionStepAnimation(
-            interactor.dreamingToLockscreenTransition,
-            params,
-            totalDuration = TO_LOCKSCREEN_DURATION
+    val lockscreenAlpha: Flow<Float> =
+        transitionAnimation.createFlow(
+            startTime = 233.milliseconds,
+            duration = 250.milliseconds,
+            onStep = { it },
        )
-    }

    companion object {
        /* Length of time before ending the dream activity, in order to start unoccluding */
@@ -81,11 +83,5 @@ constructor(
        @JvmField
        val LOCKSCREEN_ANIMATION_DURATION_MS =
            (TO_LOCKSCREEN_DURATION - DREAM_ANIMATION_DURATION).inWholeMilliseconds
-
-        val DREAM_OVERLAY_TRANSLATION_Y = AnimationParams(duration = 600.milliseconds)
-        val DREAM_OVERLAY_ALPHA = AnimationParams(duration = 250.milliseconds)
-        val LOCKSCREEN_TRANSLATION_Y = AnimationParams(duration = TO_LOCKSCREEN_DURATION)
-        val LOCKSCREEN_ALPHA =
-            AnimationParams(startTime = 233.milliseconds, duration = 250.milliseconds)
    }
 }
--- a/packages/SystemUI/src/com/android/systemui/keyguard/ui/viewmodel/GoneToDreamingTransitionViewModel.kt
+++ b/packages/SystemUI/src/com/android/systemui/keyguard/ui/viewmodel/GoneToDreamingTransitionViewModel.kt
@@ -20,15 +20,10 @@ import com.android.systemui.animation.Interpolators.EMPHASIZED_ACCELERATE
 import com.android.systemui.dagger.SysUISingleton
 import com.android.systemui.keyguard.domain.interactor.FromGoneTransitionInteractor.Companion.TO_DREAMING_DURATION
 import com.android.systemui.keyguard.domain.interactor.KeyguardTransitionInteractor
-import com.android.systemui.keyguard.shared.model.AnimationParams
-import com.android.systemui.keyguard.shared.model.TransitionState.CANCELED
-import com.android.systemui.keyguard.shared.model.TransitionState.FINISHED
+import com.android.systemui.keyguard.ui.KeyguardTransitionAnimationFlow
 import javax.inject.Inject
 import kotlin.time.Duration.Companion.milliseconds
 import kotlinx.coroutines.flow.Flow
-import kotlinx.coroutines.flow.filter
-import kotlinx.coroutines.flow.map
-import kotlinx.coroutines.flow.merge

 /** Breaks down GONE->DREAMING transition into discrete steps for corresponding views to consume. */
@SysUISingleton
@@ -38,32 +33,28 @@ constructor(
    private val interactor: KeyguardTransitionInteractor,
 ) {

+    private val transitionAnimation =
+        KeyguardTransitionAnimationFlow(
+            transitionDuration = TO_DREAMING_DURATION,
+            transitionFlow = interactor.goneToDreamingTransition,
+        )
+
    /** Lockscreen views y-translation */
    fun lockscreenTranslationY(translatePx: Int): Flow<Float> {
-        return merge(
-            flowForAnimation(LOCKSCREEN_TRANSLATION_Y).map { value ->
-                (EMPHASIZED_ACCELERATE.getInterpolation(value) * translatePx)
-            },
-            // On end, reset the translation to 0
-            interactor.goneToDreamingTransition
-                .filter { it.transitionState == FINISHED || it.transitionState == CANCELED }
-                .map { 0f }
+        return transitionAnimation.createFlow(
+            duration = 500.milliseconds,
+            onStep = { it * translatePx },
+            // Reset on cancel or finish
+            onFinish = { 0f },
+            onCancel = { 0f },
+            interpolator = EMPHASIZED_ACCELERATE,
        )
    }

    /** Lockscreen views alpha */
-    val lockscreenAlpha: Flow<Float> = flowForAnimation(LOCKSCREEN_ALPHA).map { 1f - it }
-
-    private fun flowForAnimation(params: AnimationParams): Flow<Float> {
-        return interactor.transitionStepAnimation(
-            interactor.goneToDreamingTransition,
-            params,
-            totalDuration = TO_DREAMING_DURATION
+    val lockscreenAlpha: Flow<Float> =
+        transitionAnimation.createFlow(
+            duration = 250.milliseconds,
+            onStep = { 1f - it },
        )
-    }
-
-    companion object {
-        val LOCKSCREEN_TRANSLATION_Y = AnimationParams(duration = 500.milliseconds)
-        val LOCKSCREEN_ALPHA = AnimationParams(duration = 250.milliseconds)
-    }
 }
--- a/packages/SystemUI/src/com/android/systemui/keyguard/ui/viewmodel/LockscreenToDreamingTransitionViewModel.kt
+++ b/packages/SystemUI/src/com/android/systemui/keyguard/ui/viewmodel/LockscreenToDreamingTransitionViewModel.kt
@@ -20,15 +20,10 @@ import com.android.systemui.animation.Interpolators.EMPHASIZED_ACCELERATE
 import com.android.systemui.dagger.SysUISingleton
 import com.android.systemui.keyguard.domain.interactor.FromLockscreenTransitionInteractor.Companion.TO_DREAMING_DURATION
 import com.android.systemui.keyguard.domain.interactor.KeyguardTransitionInteractor
-import com.android.systemui.keyguard.shared.model.AnimationParams
-import com.android.systemui.keyguard.shared.model.TransitionState.CANCELED
-import com.android.systemui.keyguard.shared.model.TransitionState.FINISHED
+import com.android.systemui.keyguard.ui.KeyguardTransitionAnimationFlow
 import javax.inject.Inject
 import kotlin.time.Duration.Companion.milliseconds
 import kotlinx.coroutines.flow.Flow
-import kotlinx.coroutines.flow.filter
-import kotlinx.coroutines.flow.map
-import kotlinx.coroutines.flow.merge

 /**
 * Breaks down LOCKSCREEN->DREAMING transition into discrete steps for corresponding views to
@@ -40,35 +35,32 @@ class LockscreenToDreamingTransitionViewModel
 constructor(
    private val interactor: KeyguardTransitionInteractor,
 ) {
+    private val transitionAnimation =
+        KeyguardTransitionAnimationFlow(
+            transitionDuration = TO_DREAMING_DURATION,
+            transitionFlow = interactor.lockscreenToDreamingTransition,
+        )

    /** Lockscreen views y-translation */
    fun lockscreenTranslationY(translatePx: Int): Flow<Float> {
-        return merge(
-            flowForAnimation(LOCKSCREEN_TRANSLATION_Y).map { value ->
-                (EMPHASIZED_ACCELERATE.getInterpolation(value) * translatePx)
-            },
-            // On end, reset the translation to 0
-            interactor.lockscreenToDreamingTransition
-                .filter { it.transitionState == FINISHED || it.transitionState == CANCELED }
-                .map { 0f }
+        return transitionAnimation.createFlow(
+            duration = 500.milliseconds,
+            onStep = { it * translatePx },
+            // Reset on cancel or finish
+            onFinish = { 0f },
+            onCancel = { 0f },
+            interpolator = EMPHASIZED_ACCELERATE,
        )
    }

    /** Lockscreen views alpha */
-    val lockscreenAlpha: Flow<Float> = flowForAnimation(LOCKSCREEN_ALPHA).map { 1f - it }
-
-    private fun flowForAnimation(params: AnimationParams): Flow<Float> {
-        return interactor.transitionStepAnimation(
-            interactor.lockscreenToDreamingTransition,
-            params,
-            totalDuration = TO_DREAMING_DURATION
+    val lockscreenAlpha: Flow<Float> =
+        transitionAnimation.createFlow(
+            duration = 250.milliseconds,
+            onStep = { 1f - it },
        )
-    }

    companion object {
        @JvmField val DREAMING_ANIMATION_DURATION_MS = TO_DREAMING_DURATION.inWholeMilliseconds
-
-        val LOCKSCREEN_TRANSLATION_Y = AnimationParams(duration = 500.milliseconds)
-        val LOCKSCREEN_ALPHA = AnimationParams(duration = 250.milliseconds)
    }
 }
--- a/packages/SystemUI/src/com/android/systemui/keyguard/ui/viewmodel/LockscreenToOccludedTransitionViewModel.kt
+++ b/packages/SystemUI/src/com/android/systemui/keyguard/ui/viewmodel/LockscreenToOccludedTransitionViewModel.kt
@@ -20,14 +20,10 @@ import com.android.systemui.animation.Interpolators.EMPHASIZED_ACCELERATE
 import com.android.systemui.dagger.SysUISingleton
 import com.android.systemui.keyguard.domain.interactor.FromLockscreenTransitionInteractor.Companion.TO_OCCLUDED_DURATION
 import com.android.systemui.keyguard.domain.interactor.KeyguardTransitionInteractor
-import com.android.systemui.keyguard.shared.model.AnimationParams
-import com.android.systemui.keyguard.shared.model.TransitionState
+import com.android.systemui.keyguard.ui.KeyguardTransitionAnimationFlow
 import javax.inject.Inject
 import kotlin.time.Duration.Companion.milliseconds
 import kotlinx.coroutines.flow.Flow
-import kotlinx.coroutines.flow.filter
-import kotlinx.coroutines.flow.map
-import kotlinx.coroutines.flow.merge

 /**
 * Breaks down LOCKSCREEN->OCCLUDED transition into discrete steps for corresponding views to
@@ -39,33 +35,28 @@ class LockscreenToOccludedTransitionViewModel
 constructor(
    private val interactor: KeyguardTransitionInteractor,
 ) {
+    private val transitionAnimation =
+        KeyguardTransitionAnimationFlow(
+            transitionDuration = TO_OCCLUDED_DURATION,
+            transitionFlow = interactor.lockscreenToOccludedTransition,
+        )
+
+    /** Lockscreen views alpha */
+    val lockscreenAlpha: Flow<Float> =
+        transitionAnimation.createFlow(
+            duration = 250.milliseconds,
+            onStep = { 1f - it },
+        )

    /** Lockscreen views y-translation */
    fun lockscreenTranslationY(translatePx: Int): Flow<Float> {
-        return merge(
-            flowForAnimation(LOCKSCREEN_TRANSLATION_Y).map { value ->
-                (EMPHASIZED_ACCELERATE.getInterpolation(value) * translatePx)
-            },
-            // On end, reset the translation to 0
-            interactor.lockscreenToOccludedTransition
-                .filter { step -> step.transitionState == TransitionState.FINISHED }
-                .map { 0f }
+        return transitionAnimation.createFlow(
+            duration = TO_OCCLUDED_DURATION,
+            onStep = { value -> value * translatePx },
+            // Reset on cancel or finish
+            onFinish = { 0f },
+            onCancel = { 0f },
+            interpolator = EMPHASIZED_ACCELERATE,
        )
    }
-
-    /** Lockscreen views alpha */
-    val lockscreenAlpha: Flow<Float> = flowForAnimation(LOCKSCREEN_ALPHA).map { 1f - it }
-
-    private fun flowForAnimation(params: AnimationParams): Flow<Float> {
-        return interactor.transitionStepAnimation(
-            interactor.lockscreenToOccludedTransition,
-            params,
-            totalDuration = TO_OCCLUDED_DURATION
-        )
-    }
-
-    companion object {
-        val LOCKSCREEN_TRANSLATION_Y = AnimationParams(duration = TO_OCCLUDED_DURATION)
-        val LOCKSCREEN_ALPHA = AnimationParams(duration = 250.milliseconds)
-    }
 }
--- a/packages/SystemUI/src/com/android/systemui/keyguard/ui/viewmodel/OccludedToLockscreenTransitionViewModel.kt
+++ b/packages/SystemUI/src/com/android/systemui/keyguard/ui/viewmodel/OccludedToLockscreenTransitionViewModel.kt
@@ -20,11 +20,10 @@ import com.android.systemui.animation.Interpolators.EMPHASIZED_DECELERATE
 import com.android.systemui.dagger.SysUISingleton
 import com.android.systemui.keyguard.domain.interactor.FromOccludedTransitionInteractor.Companion.TO_LOCKSCREEN_DURATION
 import com.android.systemui.keyguard.domain.interactor.KeyguardTransitionInteractor
-import com.android.systemui.keyguard.shared.model.AnimationParams
+import com.android.systemui.keyguard.ui.KeyguardTransitionAnimationFlow
 import javax.inject.Inject
 import kotlin.time.Duration.Companion.milliseconds
 import kotlinx.coroutines.flow.Flow
-import kotlinx.coroutines.flow.map

 /**
 * Breaks down OCCLUDED->LOCKSCREEN transition into discrete steps for corresponding views to
@@ -36,28 +35,26 @@ class OccludedToLockscreenTransitionViewModel
 constructor(
    private val interactor: KeyguardTransitionInteractor,
 ) {
+    private val transitionAnimation =
+        KeyguardTransitionAnimationFlow(
+            transitionDuration = TO_LOCKSCREEN_DURATION,
+            transitionFlow = interactor.occludedToLockscreenTransition,
+        )
+
    /** Lockscreen views y-translation */
    fun lockscreenTranslationY(translatePx: Int): Flow<Float> {
-        return flowForAnimation(LOCKSCREEN_TRANSLATION_Y).map { value ->
-            -translatePx + (EMPHASIZED_DECELERATE.getInterpolation(value) * translatePx)
-        }
-    }
-
-    /** Lockscreen views alpha */
-    val lockscreenAlpha: Flow<Float> = flowForAnimation(LOCKSCREEN_ALPHA)
-
-    private fun flowForAnimation(params: AnimationParams): Flow<Float> {
-        return interactor.transitionStepAnimation(
-            interactor.occludedToLockscreenTransition,
-            params,
-            totalDuration = TO_LOCKSCREEN_DURATION
+        return transitionAnimation.createFlow(
+            duration = TO_LOCKSCREEN_DURATION,
+            onStep = { value -> -translatePx + value * translatePx },
+            interpolator = EMPHASIZED_DECELERATE,
        )
    }

-    companion object {
-        @JvmField val LOCKSCREEN_ANIMATION_DURATION_MS = TO_LOCKSCREEN_DURATION.inWholeMilliseconds
-        val LOCKSCREEN_TRANSLATION_Y = AnimationParams(duration = TO_LOCKSCREEN_DURATION)
-        val LOCKSCREEN_ALPHA =
-            AnimationParams(startTime = 233.milliseconds, duration = 250.milliseconds)
-    }
+    /** Lockscreen views alpha */
+    val lockscreenAlpha: Flow<Float> =
+        transitionAnimation.createFlow(
+            startTime = 233.milliseconds,
+            duration = 250.milliseconds,
+            onStep = { it },
+        )
 }
--- a/packages/SystemUI/tests/src/com/android/systemui/keyguard/domain/interactor/KeyguardTransitionScenariosTest.kt
+++ b/packages/SystemUI/tests/src/com/android/systemui/keyguard/domain/interactor/KeyguardTransitionScenariosTest.kt
@@ -24,6 +24,7 @@ import com.android.systemui.animation.Interpolators
 import com.android.systemui.keyguard.data.repository.FakeKeyguardRepository
 import com.android.systemui.keyguard.data.repository.KeyguardTransitionRepository
 import com.android.systemui.keyguard.data.repository.KeyguardTransitionRepositoryImpl
+import com.android.systemui.keyguard.shared.model.BiometricUnlockModel
 import com.android.systemui.keyguard.shared.model.DozeStateModel
 import com.android.systemui.keyguard.shared.model.DozeTransitionModel
 import com.android.systemui.keyguard.shared.model.KeyguardState
@@ -436,6 +437,43 @@ class KeyguardTransitionScenariosTest : SysuiTestCase() {
            coroutineContext.cancelChildren()
        }

+    @Test
+    fun `DOZING to GONE`() =
+        testScope.runTest {
+            // GIVEN a prior transition has run to DOZING
+            runner.startTransition(
+                testScope,
+                TransitionInfo(
+                    ownerName = "",
+                    from = KeyguardState.LOCKSCREEN,
+                    to = KeyguardState.DOZING,
+                    animator =
+                        ValueAnimator().apply {
+                            duration = 10
+                            interpolator = Interpolators.LINEAR
+                        },
+                )
+            )
+            runCurrent()
+            reset(mockTransitionRepository)
+
+            // WHEN biometrics succeeds with wake and unlock mode
+            keyguardRepository.setBiometricUnlockState(BiometricUnlockModel.WAKE_AND_UNLOCK)
+            runCurrent()
+
+            val info =
+                withArgCaptor<TransitionInfo> {
+                    verify(mockTransitionRepository).startTransition(capture())
+                }
+            // THEN a transition to DOZING should occur
+            assertThat(info.ownerName).isEqualTo("FromDozingTransitionInteractor")
+            assertThat(info.from).isEqualTo(KeyguardState.DOZING)
+            assertThat(info.to).isEqualTo(KeyguardState.GONE)
+            assertThat(info.animator).isNotNull()
+
+            coroutineContext.cancelChildren()
+        }
+
    @Test
    fun `GONE to DOZING`() =
        testScope.runTest {
--- a/packages/SystemUI/tests/src/com/android/systemui/keyguard/ui/KeyguardTransitionAnimationFlowTest.kt
+++ b/packages/SystemUI/tests/src/com/android/systemui/keyguard/ui/KeyguardTransitionAnimationFlowTest.kt
@@ -0,0 +1,174 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.systemui.keyguard.ui
+
+import androidx.test.filters.SmallTest
+import com.android.systemui.SysuiTestCase
+import com.android.systemui.animation.Interpolators.EMPHASIZED_ACCELERATE
+import com.android.systemui.coroutines.collectLastValue
+import com.android.systemui.keyguard.data.repository.FakeKeyguardTransitionRepository
+import com.android.systemui.keyguard.shared.model.KeyguardState
+import com.android.systemui.keyguard.shared.model.TransitionState
+import com.android.systemui.keyguard.shared.model.TransitionStep
+import com.google.common.truth.Truth.assertThat
+import kotlin.time.Duration.Companion.milliseconds
+import kotlinx.coroutines.test.runTest
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.junit.runners.JUnit4
+
+@SmallTest
+@RunWith(JUnit4::class)
+class KeyguardTransitionAnimationFlowTest : SysuiTestCase() {
+    private lateinit var underTest: KeyguardTransitionAnimationFlow
+    private lateinit var repository: FakeKeyguardTransitionRepository
+
+    @Before
+    fun setUp() {
+        repository = FakeKeyguardTransitionRepository()
+        underTest =
+            KeyguardTransitionAnimationFlow(
+                1000.milliseconds,
+                repository.transitions,
+            )
+    }
+
+    @Test(expected = IllegalArgumentException::class)
+    fun zeroDurationThrowsException() = runTest {
+        val flow = underTest.createFlow(duration = 0.milliseconds, onStep = { it })
+    }
+
+    @Test(expected = IllegalArgumentException::class)
+    fun startTimePlusDurationGreaterThanTransitionDurationThrowsException() = runTest {
+        val flow =
+            underTest.createFlow(
+                startTime = 300.milliseconds,
+                duration = 800.milliseconds,
+                onStep = { it }
+            )
+    }
+
+    @Test
+    fun onFinishRunsWhenSpecified() = runTest {
+        val flow =
+            underTest.createFlow(
+                duration = 100.milliseconds,
+                onStep = { it },
+                onFinish = { 10f },
+            )
+        var animationValues = collectLastValue(flow)
+        repository.sendTransitionStep(step(1f, TransitionState.FINISHED))
+        assertThat(animationValues()).isEqualTo(10f)
+    }
+
+    @Test
+    fun onCancelRunsWhenSpecified() = runTest {
+        val flow =
+            underTest.createFlow(
+                duration = 100.milliseconds,
+                onStep = { it },
+                onCancel = { 100f },
+            )
+        var animationValues = collectLastValue(flow)
+        repository.sendTransitionStep(step(0.5f, TransitionState.CANCELED))
+        assertThat(animationValues()).isEqualTo(100f)
+    }
+
+    @Test
+    fun usesStartTime() = runTest {
+        val flow =
+            underTest.createFlow(
+                startTime = 500.milliseconds,
+                duration = 500.milliseconds,
+                onStep = { it },
+            )
+        var animationValues = collectLastValue(flow)
+        repository.sendTransitionStep(step(0f, TransitionState.STARTED))
+        assertThat(animationValues()).isEqualTo(0f)
+
+        // Should not emit a value
+        repository.sendTransitionStep(step(0.1f, TransitionState.RUNNING))
+
+        repository.sendTransitionStep(step(0.5f, TransitionState.RUNNING))
+        assertFloat(animationValues(), 0f)
+        repository.sendTransitionStep(step(0.6f, TransitionState.RUNNING))
+        assertFloat(animationValues(), 0.2f)
+        repository.sendTransitionStep(step(0.8f, TransitionState.RUNNING))
+        assertFloat(animationValues(), 0.6f)
+        repository.sendTransitionStep(step(1f, TransitionState.RUNNING))
+        assertFloat(animationValues(), 1f)
+    }
+
+    @Test
+    fun usesInterpolator() = runTest {
+        val flow =
+            underTest.createFlow(
+                duration = 1000.milliseconds,
+                interpolator = EMPHASIZED_ACCELERATE,
+                onStep = { it },
+            )
+        var animationValues = collectLastValue(flow)
+        repository.sendTransitionStep(step(0f, TransitionState.STARTED))
+        assertFloat(animationValues(), EMPHASIZED_ACCELERATE.getInterpolation(0f))
+        repository.sendTransitionStep(step(0.5f, TransitionState.RUNNING))
+        assertFloat(animationValues(), EMPHASIZED_ACCELERATE.getInterpolation(0.5f))
+        repository.sendTransitionStep(step(0.6f, TransitionState.RUNNING))
+        assertFloat(animationValues(), EMPHASIZED_ACCELERATE.getInterpolation(0.6f))
+        repository.sendTransitionStep(step(0.8f, TransitionState.RUNNING))
+        assertFloat(animationValues(), EMPHASIZED_ACCELERATE.getInterpolation(0.8f))
+        repository.sendTransitionStep(step(1f, TransitionState.RUNNING))
+        assertFloat(animationValues(), EMPHASIZED_ACCELERATE.getInterpolation(1f))
+    }
+
+    @Test
+    fun usesOnStepToDoubleValue() = runTest {
+        val flow =
+            underTest.createFlow(
+                duration = 1000.milliseconds,
+                onStep = { it * 2 },
+            )
+        var animationValues = collectLastValue(flow)
+        repository.sendTransitionStep(step(0f, TransitionState.STARTED))
+        assertFloat(animationValues(), 0f)
+        repository.sendTransitionStep(step(0.3f, TransitionState.RUNNING))
+        assertFloat(animationValues(), 0.6f)
+        repository.sendTransitionStep(step(0.6f, TransitionState.RUNNING))
+        assertFloat(animationValues(), 1.2f)
+        repository.sendTransitionStep(step(0.8f, TransitionState.RUNNING))
+        assertFloat(animationValues(), 1.6f)
+        repository.sendTransitionStep(step(1f, TransitionState.RUNNING))
+        assertFloat(animationValues(), 2f)
+    }
+
+    private fun assertFloat(actual: Float?, expected: Float) {
+        assertThat(actual!!).isWithin(0.01f).of(expected)
+    }
+
+    private fun step(
+        value: Float,
+        state: TransitionState = TransitionState.RUNNING
+    ): TransitionStep {
+        return TransitionStep(
+            from = KeyguardState.GONE,
+            to = KeyguardState.DREAMING,
+            value = value,
+            transitionState = state,
+            ownerName = "GoneToDreamingTransitionViewModelTest"
+        )
+    }
+}
--- a/packages/SystemUI/tests/src/com/android/systemui/keyguard/ui/viewmodel/DreamingToLockscreenTransitionViewModelTest.kt
+++ b/packages/SystemUI/tests/src/com/android/systemui/keyguard/ui/viewmodel/DreamingToLockscreenTransitionViewModelTest.kt
@@ -18,19 +18,13 @@ package com.android.systemui.keyguard.ui.viewmodel

 import androidx.test.filters.SmallTest
 import com.android.systemui.SysuiTestCase
-import com.android.systemui.animation.Interpolators.EMPHASIZED_ACCELERATE
-import com.android.systemui.animation.Interpolators.EMPHASIZED_DECELERATE
 import com.android.systemui.keyguard.data.repository.FakeKeyguardTransitionRepository
-import com.android.systemui.keyguard.domain.interactor.FromDreamingTransitionInteractor.Companion.TO_LOCKSCREEN_DURATION
 import com.android.systemui.keyguard.domain.interactor.KeyguardTransitionInteractor
-import com.android.systemui.keyguard.shared.model.AnimationParams
 import com.android.systemui.keyguard.shared.model.KeyguardState
 import com.android.systemui.keyguard.shared.model.TransitionState
 import com.android.systemui.keyguard.shared.model.TransitionStep
-import com.android.systemui.keyguard.ui.viewmodel.DreamingToLockscreenTransitionViewModel.Companion.DREAM_OVERLAY_ALPHA
-import com.android.systemui.keyguard.ui.viewmodel.DreamingToLockscreenTransitionViewModel.Companion.DREAM_OVERLAY_TRANSLATION_Y
-import com.android.systemui.keyguard.ui.viewmodel.DreamingToLockscreenTransitionViewModel.Companion.LOCKSCREEN_ALPHA
-import com.android.systemui.keyguard.ui.viewmodel.DreamingToLockscreenTransitionViewModel.Companion.LOCKSCREEN_TRANSLATION_Y
+import com.android.systemui.keyguard.ui.KeyguardTransitionAnimationFlow
+import com.google.common.collect.Range
 import com.google.common.truth.Truth.assertThat
 import kotlinx.coroutines.flow.launchIn
 import kotlinx.coroutines.flow.onEach
@@ -46,6 +40,7 @@ import org.junit.runners.JUnit4
 class DreamingToLockscreenTransitionViewModelTest : SysuiTestCase() {
    private lateinit var underTest: DreamingToLockscreenTransitionViewModel
    private lateinit var repository: FakeKeyguardTransitionRepository
+    private lateinit var transitionAnimation: KeyguardTransitionAnimationFlow

    @Before
    fun setUp() {
@@ -63,32 +58,18 @@ class DreamingToLockscreenTransitionViewModelTest : SysuiTestCase() {
            val job =
                underTest.dreamOverlayTranslationY(pixels).onEach { values.add(it) }.launchIn(this)

+            // Should start running here...
+            repository.sendTransitionStep(step(0f, TransitionState.STARTED))
            repository.sendTransitionStep(step(0f))
            repository.sendTransitionStep(step(0.3f))
            repository.sendTransitionStep(step(0.5f))
+            repository.sendTransitionStep(step(0.6f))
+            // ...up to here
+            repository.sendTransitionStep(step(0.8f))
            repository.sendTransitionStep(step(1f))

-            // Only 3 values should be present, since the dream overlay runs for a small fraction
-            // of the overall animation time
-            assertThat(values.size).isEqualTo(3)
-            assertThat(values[0])
-                .isEqualTo(
-                    EMPHASIZED_ACCELERATE.getInterpolation(
-                        animValue(0f, DREAM_OVERLAY_TRANSLATION_Y)
-                    ) * pixels
-                )
-            assertThat(values[1])
-                .isEqualTo(
-                    EMPHASIZED_ACCELERATE.getInterpolation(
-                        animValue(0.3f, DREAM_OVERLAY_TRANSLATION_Y)
-                    ) * pixels
-                )
-            assertThat(values[2])
-                .isEqualTo(
-                    EMPHASIZED_ACCELERATE.getInterpolation(
-                        animValue(0.5f, DREAM_OVERLAY_TRANSLATION_Y)
-                    ) * pixels
-                )
+            assertThat(values.size).isEqualTo(5)
+            values.forEach { assertThat(it).isIn(Range.closed(0f, 100f)) }

            job.cancel()
        }
@@ -100,16 +81,18 @@ class DreamingToLockscreenTransitionViewModelTest : SysuiTestCase() {

            val job = underTest.dreamOverlayAlpha.onEach { values.add(it) }.launchIn(this)

+            // Should start running here...
+            repository.sendTransitionStep(step(0f, TransitionState.STARTED))
            repository.sendTransitionStep(step(0f))
            repository.sendTransitionStep(step(0.1f))
            repository.sendTransitionStep(step(0.5f))
+            // ...up to here
            repository.sendTransitionStep(step(1f))

            // Only two values should be present, since the dream overlay runs for a small fraction
            // of the overall animation time
-            assertThat(values.size).isEqualTo(2)
-            assertThat(values[0]).isEqualTo(1f - animValue(0f, DREAM_OVERLAY_ALPHA))
-            assertThat(values[1]).isEqualTo(1f - animValue(0.1f, DREAM_OVERLAY_ALPHA))
+            assertThat(values.size).isEqualTo(4)
+            values.forEach { assertThat(it).isIn(Range.closed(0f, 1f)) }

            job.cancel()
        }
@@ -121,19 +104,15 @@ class DreamingToLockscreenTransitionViewModelTest : SysuiTestCase() {

            val job = underTest.lockscreenAlpha.onEach { values.add(it) }.launchIn(this)

+            repository.sendTransitionStep(step(0f, TransitionState.STARTED))
            repository.sendTransitionStep(step(0f))
            repository.sendTransitionStep(step(0.1f))
-            // Should start running here...
            repository.sendTransitionStep(step(0.2f))
            repository.sendTransitionStep(step(0.3f))
-            // ...up to here
            repository.sendTransitionStep(step(1f))

-            // Only two values should be present, since the dream overlay runs for a small fraction
-            // of the overall animation time
-            assertThat(values.size).isEqualTo(2)
-            assertThat(values[0]).isEqualTo(animValue(0.2f, LOCKSCREEN_ALPHA))
-            assertThat(values[1]).isEqualTo(animValue(0.3f, LOCKSCREEN_ALPHA))
+            assertThat(values.size).isEqualTo(4)
+            values.forEach { assertThat(it).isIn(Range.closed(0f, 1f)) }

            job.cancel()
        }
@@ -147,58 +126,27 @@ class DreamingToLockscreenTransitionViewModelTest : SysuiTestCase() {
            val job =
                underTest.lockscreenTranslationY(pixels).onEach { values.add(it) }.launchIn(this)

+            repository.sendTransitionStep(step(0f, TransitionState.STARTED))
            repository.sendTransitionStep(step(0f))
            repository.sendTransitionStep(step(0.3f))
            repository.sendTransitionStep(step(0.5f))
            repository.sendTransitionStep(step(1f))

-            assertThat(values.size).isEqualTo(4)
-            assertThat(values[0])
-                .isEqualTo(
-                    -pixels +
-                        EMPHASIZED_DECELERATE.getInterpolation(
-                            animValue(0f, LOCKSCREEN_TRANSLATION_Y)
-                        ) * pixels
-                )
-            assertThat(values[1])
-                .isEqualTo(
-                    -pixels +
-                        EMPHASIZED_DECELERATE.getInterpolation(
-                            animValue(0.3f, LOCKSCREEN_TRANSLATION_Y)
-                        ) * pixels
-                )
-            assertThat(values[2])
-                .isEqualTo(
-                    -pixels +
-                        EMPHASIZED_DECELERATE.getInterpolation(
-                            animValue(0.5f, LOCKSCREEN_TRANSLATION_Y)
-                        ) * pixels
-                )
-            assertThat(values[3])
-                .isEqualTo(
-                    -pixels +
-                        EMPHASIZED_DECELERATE.getInterpolation(
-                            animValue(1f, LOCKSCREEN_TRANSLATION_Y)
-                        ) * pixels
-                )
+            assertThat(values.size).isEqualTo(5)
+            values.forEach { assertThat(it).isIn(Range.closed(-100f, 0f)) }

            job.cancel()
        }

-    private fun animValue(stepValue: Float, params: AnimationParams): Float {
-        val totalDuration = TO_LOCKSCREEN_DURATION
-        val startValue = (params.startTime / totalDuration).toFloat()
-
-        val multiplier = (totalDuration / params.duration).toFloat()
-        return (stepValue - startValue) * multiplier
-    }
-
-    private fun step(value: Float): TransitionStep {
+    private fun step(
+        value: Float,
+        state: TransitionState = TransitionState.RUNNING
+    ): TransitionStep {
        return TransitionStep(
            from = KeyguardState.DREAMING,
            to = KeyguardState.LOCKSCREEN,
            value = value,
-            transitionState = TransitionState.RUNNING,
+            transitionState = state,
            ownerName = "DreamingToLockscreenTransitionViewModelTest"
        )
    }
--- a/packages/SystemUI/tests/src/com/android/systemui/keyguard/ui/viewmodel/GoneToDreamingTransitionViewModelTest.kt
+++ b/packages/SystemUI/tests/src/com/android/systemui/keyguard/ui/viewmodel/GoneToDreamingTransitionViewModelTest.kt
@@ -18,16 +18,12 @@ package com.android.systemui.keyguard.ui.viewmodel

 import androidx.test.filters.SmallTest
 import com.android.systemui.SysuiTestCase
-import com.android.systemui.animation.Interpolators.EMPHASIZED_ACCELERATE
 import com.android.systemui.keyguard.data.repository.FakeKeyguardTransitionRepository
-import com.android.systemui.keyguard.domain.interactor.FromGoneTransitionInteractor.Companion.TO_DREAMING_DURATION
 import com.android.systemui.keyguard.domain.interactor.KeyguardTransitionInteractor
-import com.android.systemui.keyguard.shared.model.AnimationParams
 import com.android.systemui.keyguard.shared.model.KeyguardState
 import com.android.systemui.keyguard.shared.model.TransitionState
 import com.android.systemui.keyguard.shared.model.TransitionStep
-import com.android.systemui.keyguard.ui.viewmodel.GoneToDreamingTransitionViewModel.Companion.LOCKSCREEN_ALPHA
-import com.android.systemui.keyguard.ui.viewmodel.GoneToDreamingTransitionViewModel.Companion.LOCKSCREEN_TRANSLATION_Y
+import com.google.common.collect.Range
 import com.google.common.truth.Truth.assertThat
 import kotlinx.coroutines.flow.launchIn
 import kotlinx.coroutines.flow.onEach
@@ -59,20 +55,18 @@ class GoneToDreamingTransitionViewModelTest : SysuiTestCase() {
            val job = underTest.lockscreenAlpha.onEach { values.add(it) }.launchIn(this)

            // Should start running here...
+            repository.sendTransitionStep(step(0f, TransitionState.STARTED))
            repository.sendTransitionStep(step(0f))
            repository.sendTransitionStep(step(0.1f))
            repository.sendTransitionStep(step(0.2f))
-            // ...up to here
            repository.sendTransitionStep(step(0.3f))
+            // ...up to here
            repository.sendTransitionStep(step(1f))

            // Only three values should be present, since the dream overlay runs for a small
-            // fraction
-            // of the overall animation time
-            assertThat(values.size).isEqualTo(3)
-            assertThat(values[0]).isEqualTo(1f - animValue(0f, LOCKSCREEN_ALPHA))
-            assertThat(values[1]).isEqualTo(1f - animValue(0.1f, LOCKSCREEN_ALPHA))
-            assertThat(values[2]).isEqualTo(1f - animValue(0.2f, LOCKSCREEN_ALPHA))
+            // fraction of the overall animation time
+            assertThat(values.size).isEqualTo(5)
+            values.forEach { assertThat(it).isIn(Range.closed(0f, 1f)) }

            job.cancel()
        }
@@ -87,45 +81,19 @@ class GoneToDreamingTransitionViewModelTest : SysuiTestCase() {
                underTest.lockscreenTranslationY(pixels).onEach { values.add(it) }.launchIn(this)

            // Should start running here...
+            repository.sendTransitionStep(step(0f, TransitionState.STARTED))
            repository.sendTransitionStep(step(0f))
            repository.sendTransitionStep(step(0.3f))
            repository.sendTransitionStep(step(0.5f))
-            // ...up to here
-            repository.sendTransitionStep(step(1f))
            // And a final reset event on CANCEL
            repository.sendTransitionStep(step(0.8f, TransitionState.CANCELED))

-            assertThat(values.size).isEqualTo(4)
-            assertThat(values[0])
-                .isEqualTo(
-                    EMPHASIZED_ACCELERATE.getInterpolation(
-                        animValue(0f, LOCKSCREEN_TRANSLATION_Y)
-                    ) * pixels
-                )
-            assertThat(values[1])
-                .isEqualTo(
-                    EMPHASIZED_ACCELERATE.getInterpolation(
-                        animValue(0.3f, LOCKSCREEN_TRANSLATION_Y)
-                    ) * pixels
-                )
-            assertThat(values[2])
-                .isEqualTo(
-                    EMPHASIZED_ACCELERATE.getInterpolation(
-                        animValue(0.5f, LOCKSCREEN_TRANSLATION_Y)
-                    ) * pixels
-                )
-            assertThat(values[3]).isEqualTo(0f)
+            assertThat(values.size).isEqualTo(5)
+            values.forEach { assertThat(it).isIn(Range.closed(0f, 100f)) }
+
            job.cancel()
        }

-    private fun animValue(stepValue: Float, params: AnimationParams): Float {
-        val totalDuration = TO_DREAMING_DURATION
-        val startValue = (params.startTime / totalDuration).toFloat()
-
-        val multiplier = (totalDuration / params.duration).toFloat()
-        return (stepValue - startValue) * multiplier
-    }
-
    private fun step(
        value: Float,
        state: TransitionState = TransitionState.RUNNING
--- a/packages/SystemUI/tests/src/com/android/systemui/keyguard/ui/viewmodel/LockscreenToDreamingTransitionViewModelTest.kt
+++ b/packages/SystemUI/tests/src/com/android/systemui/keyguard/ui/viewmodel/LockscreenToDreamingTransitionViewModelTest.kt
@@ -18,16 +18,12 @@ package com.android.systemui.keyguard.ui.viewmodel

 import androidx.test.filters.SmallTest
 import com.android.systemui.SysuiTestCase
-import com.android.systemui.animation.Interpolators.EMPHASIZED_ACCELERATE
 import com.android.systemui.keyguard.data.repository.FakeKeyguardTransitionRepository
-import com.android.systemui.keyguard.domain.interactor.FromLockscreenTransitionInteractor.Companion.TO_DREAMING_DURATION
 import com.android.systemui.keyguard.domain.interactor.KeyguardTransitionInteractor
-import com.android.systemui.keyguard.shared.model.AnimationParams
 import com.android.systemui.keyguard.shared.model.KeyguardState
 import com.android.systemui.keyguard.shared.model.TransitionState
 import com.android.systemui.keyguard.shared.model.TransitionStep
-import com.android.systemui.keyguard.ui.viewmodel.LockscreenToDreamingTransitionViewModel.Companion.LOCKSCREEN_ALPHA
-import com.android.systemui.keyguard.ui.viewmodel.LockscreenToDreamingTransitionViewModel.Companion.LOCKSCREEN_TRANSLATION_Y
+import com.google.common.collect.Range
 import com.google.common.truth.Truth.assertThat
 import kotlinx.coroutines.flow.launchIn
 import kotlinx.coroutines.flow.onEach
@@ -59,19 +55,18 @@ class LockscreenToDreamingTransitionViewModelTest : SysuiTestCase() {
            val job = underTest.lockscreenAlpha.onEach { values.add(it) }.launchIn(this)

            // Should start running here...
+            repository.sendTransitionStep(step(0f, TransitionState.STARTED))
            repository.sendTransitionStep(step(0f))
            repository.sendTransitionStep(step(0.1f))
            repository.sendTransitionStep(step(0.2f))
-            // ...up to here
            repository.sendTransitionStep(step(0.3f))
+            // ...up to here
            repository.sendTransitionStep(step(1f))

            // Only three values should be present, since the dream overlay runs for a small
            // fraction of the overall animation time
-            assertThat(values.size).isEqualTo(3)
-            assertThat(values[0]).isEqualTo(1f - animValue(0f, LOCKSCREEN_ALPHA))
-            assertThat(values[1]).isEqualTo(1f - animValue(0.1f, LOCKSCREEN_ALPHA))
-            assertThat(values[2]).isEqualTo(1f - animValue(0.2f, LOCKSCREEN_ALPHA))
+            assertThat(values.size).isEqualTo(5)
+            values.forEach { assertThat(it).isIn(Range.closed(0f, 1f)) }

            job.cancel()
        }
@@ -85,47 +80,22 @@ class LockscreenToDreamingTransitionViewModelTest : SysuiTestCase() {
            val job =
                underTest.lockscreenTranslationY(pixels).onEach { values.add(it) }.launchIn(this)

-            // Should start running here...
+            repository.sendTransitionStep(step(0f, TransitionState.STARTED))
            repository.sendTransitionStep(step(0f))
            repository.sendTransitionStep(step(0.3f))
            repository.sendTransitionStep(step(0.5f))
-            // ...up to here
            repository.sendTransitionStep(step(1f))
            // And a final reset event on FINISHED
            repository.sendTransitionStep(step(1f, TransitionState.FINISHED))

-            assertThat(values.size).isEqualTo(4)
-            assertThat(values[0])
-                .isEqualTo(
-                    EMPHASIZED_ACCELERATE.getInterpolation(
-                        animValue(0f, LOCKSCREEN_TRANSLATION_Y)
-                    ) * pixels
-                )
-            assertThat(values[1])
-                .isEqualTo(
-                    EMPHASIZED_ACCELERATE.getInterpolation(
-                        animValue(0.3f, LOCKSCREEN_TRANSLATION_Y)
-                    ) * pixels
-                )
-            assertThat(values[2])
-                .isEqualTo(
-                    EMPHASIZED_ACCELERATE.getInterpolation(
-                        animValue(0.5f, LOCKSCREEN_TRANSLATION_Y)
-                    ) * pixels
-                )
-            assertThat(values[3]).isEqualTo(0f)
+            assertThat(values.size).isEqualTo(6)
+            values.forEach { assertThat(it).isIn(Range.closed(0f, 100f)) }
+            // Validate finished value
+            assertThat(values[5]).isEqualTo(0f)

            job.cancel()
        }

-    private fun animValue(stepValue: Float, params: AnimationParams): Float {
-        val totalDuration = TO_DREAMING_DURATION
-        val startValue = (params.startTime / totalDuration).toFloat()
-
-        val multiplier = (totalDuration / params.duration).toFloat()
-        return (stepValue - startValue) * multiplier
-    }
-
    private fun step(
        value: Float,
        state: TransitionState = TransitionState.RUNNING
--- a/packages/SystemUI/tests/src/com/android/systemui/keyguard/ui/viewmodel/LockscreenToOccludedTransitionViewModelTest.kt
+++ b/packages/SystemUI/tests/src/com/android/systemui/keyguard/ui/viewmodel/LockscreenToOccludedTransitionViewModelTest.kt
@@ -18,16 +18,12 @@ package com.android.systemui.keyguard.ui.viewmodel

 import androidx.test.filters.SmallTest
 import com.android.systemui.SysuiTestCase
-import com.android.systemui.animation.Interpolators.EMPHASIZED_ACCELERATE
 import com.android.systemui.keyguard.data.repository.FakeKeyguardTransitionRepository
-import com.android.systemui.keyguard.domain.interactor.FromLockscreenTransitionInteractor.Companion.TO_OCCLUDED_DURATION
 import com.android.systemui.keyguard.domain.interactor.KeyguardTransitionInteractor
-import com.android.systemui.keyguard.shared.model.AnimationParams
 import com.android.systemui.keyguard.shared.model.KeyguardState
 import com.android.systemui.keyguard.shared.model.TransitionState
 import com.android.systemui.keyguard.shared.model.TransitionStep
-import com.android.systemui.keyguard.ui.viewmodel.LockscreenToOccludedTransitionViewModel.Companion.LOCKSCREEN_ALPHA
-import com.android.systemui.keyguard.ui.viewmodel.LockscreenToOccludedTransitionViewModel.Companion.LOCKSCREEN_TRANSLATION_Y
+import com.google.common.collect.Range
 import com.google.common.truth.Truth.assertThat
 import kotlinx.coroutines.flow.launchIn
 import kotlinx.coroutines.flow.onEach
@@ -59,19 +55,18 @@ class LockscreenToOccludedTransitionViewModelTest : SysuiTestCase() {
            val job = underTest.lockscreenAlpha.onEach { values.add(it) }.launchIn(this)

            // Should start running here...
+            repository.sendTransitionStep(step(0f, TransitionState.STARTED))
            repository.sendTransitionStep(step(0f))
            repository.sendTransitionStep(step(0.1f))
            repository.sendTransitionStep(step(0.4f))
-            // ...up to here
            repository.sendTransitionStep(step(0.7f))
+            // ...up to here
            repository.sendTransitionStep(step(1f))

            // Only 3 values should be present, since the dream overlay runs for a small fraction
            // of the overall animation time
-            assertThat(values.size).isEqualTo(3)
-            assertThat(values[0]).isEqualTo(1f - animValue(0f, LOCKSCREEN_ALPHA))
-            assertThat(values[1]).isEqualTo(1f - animValue(0.1f, LOCKSCREEN_ALPHA))
-            assertThat(values[2]).isEqualTo(1f - animValue(0.4f, LOCKSCREEN_ALPHA))
+            assertThat(values.size).isEqualTo(5)
+            values.forEach { assertThat(it).isIn(Range.closed(0f, 1f)) }

            job.cancel()
        }
@@ -86,54 +81,51 @@ class LockscreenToOccludedTransitionViewModelTest : SysuiTestCase() {
                underTest.lockscreenTranslationY(pixels).onEach { values.add(it) }.launchIn(this)

            // Should start running here...
+            repository.sendTransitionStep(step(0f, TransitionState.STARTED))
            repository.sendTransitionStep(step(0f))
            repository.sendTransitionStep(step(0.3f))
            repository.sendTransitionStep(step(0.5f))
            repository.sendTransitionStep(step(1f))
            // ...up to here

-            assertThat(values.size).isEqualTo(4)
-            assertThat(values[0])
-                .isEqualTo(
-                    EMPHASIZED_ACCELERATE.getInterpolation(
-                        animValue(0f, LOCKSCREEN_TRANSLATION_Y)
-                    ) * pixels
-                )
-            assertThat(values[1])
-                .isEqualTo(
-                    EMPHASIZED_ACCELERATE.getInterpolation(
-                        animValue(0.3f, LOCKSCREEN_TRANSLATION_Y)
-                    ) * pixels
-                )
-            assertThat(values[2])
-                .isEqualTo(
-                    EMPHASIZED_ACCELERATE.getInterpolation(
-                        animValue(0.5f, LOCKSCREEN_TRANSLATION_Y)
-                    ) * pixels
-                )
-            assertThat(values[3])
-                .isEqualTo(
-                    EMPHASIZED_ACCELERATE.getInterpolation(
-                        animValue(1f, LOCKSCREEN_TRANSLATION_Y)
-                    ) * pixels
-                )
+            assertThat(values.size).isEqualTo(5)
+            values.forEach { assertThat(it).isIn(Range.closed(0f, 100f)) }
+
            job.cancel()
        }

-    private fun animValue(stepValue: Float, params: AnimationParams): Float {
-        val totalDuration = TO_OCCLUDED_DURATION
-        val startValue = (params.startTime / totalDuration).toFloat()
+    @Test
+    fun lockscreenTranslationYIsCanceled() =
+        runTest(UnconfinedTestDispatcher()) {
+            val values = mutableListOf<Float>()

-        val multiplier = (totalDuration / params.duration).toFloat()
-        return (stepValue - startValue) * multiplier
-    }
+            val pixels = 100
+            val job =
+                underTest.lockscreenTranslationY(pixels).onEach { values.add(it) }.launchIn(this)

-    private fun step(value: Float): TransitionStep {
+            repository.sendTransitionStep(step(0f, TransitionState.STARTED))
+            repository.sendTransitionStep(step(0f))
+            repository.sendTransitionStep(step(0.3f))
+            repository.sendTransitionStep(step(0.3f, TransitionState.CANCELED))
+
+            assertThat(values.size).isEqualTo(4)
+            values.forEach { assertThat(it).isIn(Range.closed(0f, 100f)) }
+
+            // Cancel will reset the translation
+            assertThat(values[3]).isEqualTo(0)
+
+            job.cancel()
+        }
+
+    private fun step(
+        value: Float,
+        state: TransitionState = TransitionState.RUNNING,
+    ): TransitionStep {
        return TransitionStep(
            from = KeyguardState.LOCKSCREEN,
            to = KeyguardState.OCCLUDED,
            value = value,
-            transitionState = TransitionState.RUNNING,
+            transitionState = state,
            ownerName = "LockscreenToOccludedTransitionViewModelTest"
        )
    }
--- a/packages/SystemUI/tests/src/com/android/systemui/keyguard/ui/viewmodel/OccludedToLockscreenTransitionViewModelTest.kt
+++ b/packages/SystemUI/tests/src/com/android/systemui/keyguard/ui/viewmodel/OccludedToLockscreenTransitionViewModelTest.kt
@@ -18,16 +18,12 @@ package com.android.systemui.keyguard.ui.viewmodel

 import androidx.test.filters.SmallTest
 import com.android.systemui.SysuiTestCase
-import com.android.systemui.animation.Interpolators.EMPHASIZED_DECELERATE
 import com.android.systemui.keyguard.data.repository.FakeKeyguardTransitionRepository
-import com.android.systemui.keyguard.domain.interactor.FromOccludedTransitionInteractor.Companion.TO_LOCKSCREEN_DURATION
 import com.android.systemui.keyguard.domain.interactor.KeyguardTransitionInteractor
-import com.android.systemui.keyguard.shared.model.AnimationParams
 import com.android.systemui.keyguard.shared.model.KeyguardState
 import com.android.systemui.keyguard.shared.model.TransitionState
 import com.android.systemui.keyguard.shared.model.TransitionStep
-import com.android.systemui.keyguard.ui.viewmodel.OccludedToLockscreenTransitionViewModel.Companion.LOCKSCREEN_ALPHA
-import com.android.systemui.keyguard.ui.viewmodel.OccludedToLockscreenTransitionViewModel.Companion.LOCKSCREEN_TRANSLATION_Y
+import com.google.common.collect.Range
 import com.google.common.truth.Truth.assertThat
 import kotlinx.coroutines.flow.launchIn
 import kotlinx.coroutines.flow.onEach
@@ -58,21 +54,19 @@ class OccludedToLockscreenTransitionViewModelTest : SysuiTestCase() {

            val job = underTest.lockscreenAlpha.onEach { values.add(it) }.launchIn(this)

-            repository.sendTransitionStep(step(0f))
+            repository.sendTransitionStep(step(0f, TransitionState.STARTED))
+            repository.sendTransitionStep(step(0.1f))
            // Should start running here...
            repository.sendTransitionStep(step(0.3f))
            repository.sendTransitionStep(step(0.4f))
            repository.sendTransitionStep(step(0.5f))
-            // ...up to here
            repository.sendTransitionStep(step(0.6f))
+            // ...up to here
+            repository.sendTransitionStep(step(0.8f))
            repository.sendTransitionStep(step(1f))

-            // Only two values should be present, since the dream overlay runs for a small fraction
-            // of the overall animation time
-            assertThat(values.size).isEqualTo(3)
-            assertThat(values[0]).isEqualTo(animValue(0.3f, LOCKSCREEN_ALPHA))
-            assertThat(values[1]).isEqualTo(animValue(0.4f, LOCKSCREEN_ALPHA))
-            assertThat(values[2]).isEqualTo(animValue(0.5f, LOCKSCREEN_ALPHA))
+            assertThat(values.size).isEqualTo(5)
+            values.forEach { assertThat(it).isIn(Range.closed(0f, 1f)) }

            job.cancel()
        }
@@ -86,58 +80,27 @@ class OccludedToLockscreenTransitionViewModelTest : SysuiTestCase() {
            val job =
                underTest.lockscreenTranslationY(pixels).onEach { values.add(it) }.launchIn(this)

+            repository.sendTransitionStep(step(0f, TransitionState.STARTED))
            repository.sendTransitionStep(step(0f))
            repository.sendTransitionStep(step(0.3f))
            repository.sendTransitionStep(step(0.5f))
            repository.sendTransitionStep(step(1f))

-            assertThat(values.size).isEqualTo(4)
-            assertThat(values[0])
-                .isEqualTo(
-                    -pixels +
-                        EMPHASIZED_DECELERATE.getInterpolation(
-                            animValue(0f, LOCKSCREEN_TRANSLATION_Y)
-                        ) * pixels
-                )
-            assertThat(values[1])
-                .isEqualTo(
-                    -pixels +
-                        EMPHASIZED_DECELERATE.getInterpolation(
-                            animValue(0.3f, LOCKSCREEN_TRANSLATION_Y)
-                        ) * pixels
-                )
-            assertThat(values[2])
-                .isEqualTo(
-                    -pixels +
-                        EMPHASIZED_DECELERATE.getInterpolation(
-                            animValue(0.5f, LOCKSCREEN_TRANSLATION_Y)
-                        ) * pixels
-                )
-            assertThat(values[3])
-                .isEqualTo(
-                    -pixels +
-                        EMPHASIZED_DECELERATE.getInterpolation(
-                            animValue(1f, LOCKSCREEN_TRANSLATION_Y)
-                        ) * pixels
-                )
+            assertThat(values.size).isEqualTo(5)
+            values.forEach { assertThat(it).isIn(Range.closed(-100f, 0f)) }

            job.cancel()
        }

-    private fun animValue(stepValue: Float, params: AnimationParams): Float {
-        val totalDuration = TO_LOCKSCREEN_DURATION
-        val startValue = (params.startTime / totalDuration).toFloat()
-
-        val multiplier = (totalDuration / params.duration).toFloat()
-        return (stepValue - startValue) * multiplier
-    }
-
-    private fun step(value: Float): TransitionStep {
+    private fun step(
+        value: Float,
+        state: TransitionState = TransitionState.RUNNING
+    ): TransitionStep {
        return TransitionStep(
            from = KeyguardState.OCCLUDED,
            to = KeyguardState.LOCKSCREEN,
            value = value,
-            transitionState = TransitionState.RUNNING,
+            transitionState = state,
            ownerName = "OccludedToLockscreenTransitionViewModelTest"
        )
    }