Merge "Modernize UDFPS views for maintainability" into udc-qpr-dev

packages/SystemUI/res-keyguard/layout/udfps_keyguard_view.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ 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.
+  -->
+<com.android.systemui.biometrics.UdfpsKeyguardView
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/udfps_animation_view"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <!-- Add fingerprint views here. See udfps_keyguard_view_internal.xml. -->
+
+</com.android.systemui.biometrics.UdfpsKeyguardView>

packages/SystemUI/res/layout/udfps_keyguard_view_legacy.xml

@@ -16,8 +16,7 @@
   -->
 <com.android.systemui.biometrics.UdfpsKeyguardViewLegacy
     xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
-    android:id="@+id/udfps_animation_view"
+    android:id="@+id/udfps_animation_view_legacy"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 

packages/SystemUI/src/com/android/systemui/biometrics/UdfpsController.java

@@ -85,6 +85,8 @@ import com.android.systemui.flags.FeatureFlags;
 import com.android.systemui.flags.Flags;
 import com.android.systemui.keyguard.ScreenLifecycle;
 import com.android.systemui.keyguard.domain.interactor.KeyguardFaceAuthInteractor;
+import com.android.systemui.keyguard.ui.adapter.UdfpsKeyguardViewControllerAdapter;
+import com.android.systemui.keyguard.ui.viewmodel.UdfpsKeyguardViewModels;
 import com.android.systemui.log.SessionTracker;
 import com.android.systemui.plugins.FalsingManager;
 import com.android.systemui.plugins.statusbar.StatusBarStateController;
@@ -153,6 +155,7 @@ public class UdfpsController implements DozeReceiver, Dumpable {
     @NonNull private final SystemUIDialogManager mDialogManager;
     @NonNull private final KeyguardUpdateMonitor mKeyguardUpdateMonitor;
     @NonNull private final KeyguardFaceAuthInteractor mKeyguardFaceAuthInteractor;
+    @NonNull private final Provider<UdfpsKeyguardViewModels> mUdfpsKeyguardViewModels;
     @NonNull private final VibratorHelper mVibrator;
     @NonNull private final FeatureFlags mFeatureFlags;
     @NonNull private final FalsingManager mFalsingManager;
@@ -272,7 +275,8 @@ public class UdfpsController implements DozeReceiver, Dumpable {
                             (view, event, fromUdfpsView) -> onTouch(requestId, event,
                                     fromUdfpsView), mActivityLaunchAnimator, mFeatureFlags,
                             mPrimaryBouncerInteractor, mAlternateBouncerInteractor, mUdfpsUtils,
-                            mUdfpsKeyguardAccessibilityDelegate)));
+                            mUdfpsKeyguardAccessibilityDelegate,
+                            mUdfpsKeyguardViewModels)));
         }
 
         @Override
@@ -784,7 +788,7 @@ public class UdfpsController implements DozeReceiver, Dumpable {
     private boolean shouldTryToDismissKeyguard() {
         return mOverlay != null
                 && mOverlay.getAnimationViewController()
-                instanceof UdfpsKeyguardViewControllerLegacy
+                instanceof UdfpsKeyguardViewControllerAdapter
                 && mKeyguardStateController.canDismissLockScreen()
                 && !mAttemptedToDismissKeyguard;
     }
@@ -829,7 +833,8 @@ public class UdfpsController implements DozeReceiver, Dumpable {
             @NonNull InputManager inputManager,
             @NonNull UdfpsUtils udfpsUtils,
             @NonNull KeyguardFaceAuthInteractor keyguardFaceAuthInteractor,
-            @NonNull UdfpsKeyguardAccessibilityDelegate udfpsKeyguardAccessibilityDelegate) {
+            @NonNull UdfpsKeyguardAccessibilityDelegate udfpsKeyguardAccessibilityDelegate,
+            @NonNull Provider<UdfpsKeyguardViewModels> udfpsKeyguardViewModelsProvider) {
         mContext = context;
         mExecution = execution;
         mVibrator = vibrator;
@@ -895,6 +900,7 @@ public class UdfpsController implements DozeReceiver, Dumpable {
                     return Unit.INSTANCE;
                 });
         mKeyguardFaceAuthInteractor = keyguardFaceAuthInteractor;
+        mUdfpsKeyguardViewModels = udfpsKeyguardViewModelsProvider;
 
         final UdfpsOverlayController mUdfpsOverlayController = new UdfpsOverlayController();
         mFingerprintManager.setUdfpsOverlayController(mUdfpsOverlayController);

packages/SystemUI/src/com/android/systemui/biometrics/UdfpsControllerOverlay.kt

@@ -46,15 +46,19 @@ import android.view.accessibility.AccessibilityManager.TouchExplorationStateChan
 import androidx.annotation.LayoutRes
 import androidx.annotation.VisibleForTesting
 import com.android.keyguard.KeyguardUpdateMonitor
-import com.android.settingslib.udfps.UdfpsUtils
 import com.android.settingslib.udfps.UdfpsOverlayParams
+import com.android.settingslib.udfps.UdfpsUtils
 import com.android.systemui.R
 import com.android.systemui.animation.ActivityLaunchAnimator
+import com.android.systemui.biometrics.ui.controller.UdfpsKeyguardViewController
+import com.android.systemui.bouncer.domain.interactor.AlternateBouncerInteractor
+import com.android.systemui.bouncer.domain.interactor.PrimaryBouncerInteractor
 import com.android.systemui.dump.DumpManager
 import com.android.systemui.flags.FeatureFlags
 import com.android.systemui.flags.Flags
-import com.android.systemui.bouncer.domain.interactor.AlternateBouncerInteractor
-import com.android.systemui.bouncer.domain.interactor.PrimaryBouncerInteractor
+import com.android.systemui.flags.Flags.REFACTOR_UDFPS_KEYGUARD_VIEWS
+import com.android.systemui.keyguard.ui.adapter.UdfpsKeyguardViewControllerAdapter
+import com.android.systemui.keyguard.ui.viewmodel.UdfpsKeyguardViewModels
 import com.android.systemui.plugins.statusbar.StatusBarStateController
 import com.android.systemui.shade.ShadeExpansionStateManager
 import com.android.systemui.statusbar.LockscreenShadeTransitionController
@@ -64,6 +68,8 @@ import com.android.systemui.statusbar.phone.UnlockedScreenOffAnimationController
 import com.android.systemui.statusbar.policy.ConfigurationController
 import com.android.systemui.statusbar.policy.KeyguardStateController
 import com.android.systemui.util.settings.SecureSettings
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import javax.inject.Provider
 
 private const val TAG = "UdfpsControllerOverlay"
 
@@ -75,6 +81,7 @@ const val SETTING_REMOVE_ENROLLMENT_UI = "udfps_overlay_remove_enrollment_ui"
  * request. This state can persist across configuration changes via the [show] and [hide]
  * methods.
  */
+@ExperimentalCoroutinesApi
 @UiThread
 class UdfpsControllerOverlay @JvmOverloads constructor(
         private val context: Context,
@@ -105,6 +112,7 @@ class UdfpsControllerOverlay @JvmOverloads constructor(
         private val isDebuggable: Boolean = Build.IS_DEBUGGABLE,
         private val udfpsUtils: UdfpsUtils,
         private val udfpsKeyguardAccessibilityDelegate: UdfpsKeyguardAccessibilityDelegate,
+        private val udfpsKeyguardViewModels: Provider<UdfpsKeyguardViewModels>,
 ) {
     /** The view, when [isShowing], or null. */
     var overlayView: UdfpsView? = null
@@ -243,27 +251,40 @@ class UdfpsControllerOverlay @JvmOverloads constructor(
                 )
             }
             REASON_AUTH_KEYGUARD -> {
-                UdfpsKeyguardViewControllerLegacy(
-                    view.addUdfpsView(R.layout.udfps_keyguard_view_legacy) {
-                        updateSensorLocation(sensorBounds)
-                    },
-                    statusBarStateController,
-                    shadeExpansionStateManager,
-                    statusBarKeyguardViewManager,
-                    keyguardUpdateMonitor,
-                    dumpManager,
-                    transitionController,
-                    configurationController,
-                    keyguardStateController,
-                    unlockedScreenOffAnimationController,
-                    dialogManager,
-                    controller,
-                    activityLaunchAnimator,
-                    featureFlags,
-                    primaryBouncerInteractor,
-                    alternateBouncerInteractor,
-                    udfpsKeyguardAccessibilityDelegate,
-                )
+                if (featureFlags.isEnabled(REFACTOR_UDFPS_KEYGUARD_VIEWS)) {
+                    udfpsKeyguardViewModels.get().setSensorBounds(sensorBounds)
+                    UdfpsKeyguardViewController(
+                        view.addUdfpsView(R.layout.udfps_keyguard_view),
+                        statusBarStateController,
+                        shadeExpansionStateManager,
+                        dialogManager,
+                        dumpManager,
+                        alternateBouncerInteractor,
+                        udfpsKeyguardViewModels.get(),
+                    )
+                } else {
+                    UdfpsKeyguardViewControllerLegacy(
+                        view.addUdfpsView(R.layout.udfps_keyguard_view_legacy) {
+                            updateSensorLocation(sensorBounds)
+                        },
+                        statusBarStateController,
+                        shadeExpansionStateManager,
+                        statusBarKeyguardViewManager,
+                        keyguardUpdateMonitor,
+                        dumpManager,
+                        transitionController,
+                        configurationController,
+                        keyguardStateController,
+                        unlockedScreenOffAnimationController,
+                        dialogManager,
+                        controller,
+                        activityLaunchAnimator,
+                        featureFlags,
+                        primaryBouncerInteractor,
+                        alternateBouncerInteractor,
+                        udfpsKeyguardAccessibilityDelegate,
+                    )
+                }
             }
             REASON_AUTH_BP -> {
                 // note: empty controller, currently shows no visual affordance
@@ -415,7 +436,7 @@ class UdfpsControllerOverlay @JvmOverloads constructor(
     }
 
     private fun shouldRotate(animation: UdfpsAnimationViewController<*>?): Boolean {
-        if (animation !is UdfpsKeyguardViewControllerLegacy) {
+        if (animation !is UdfpsKeyguardViewControllerAdapter) {
             // always rotate view if we're not on the keyguard
             return true
         }

packages/SystemUI/src/com/android/systemui/biometrics/UdfpsKeyguardView.kt

@@ -0,0 +1,58 @@
+/*
+ * 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.biometrics
+
+import android.content.Context
+import android.util.AttributeSet
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+
+/** View corresponding with udfps_keyguard_view.xml */
+@ExperimentalCoroutinesApi
+class UdfpsKeyguardView(
+    context: Context,
+    attrs: AttributeSet?,
+) :
+    UdfpsAnimationView(
+        context,
+        attrs,
+    ) {
+    private val fingerprintDrawablePlaceHolder = UdfpsFpDrawable(context)
+    private var visible = false
+
+    override fun calculateAlpha(): Int {
+        return if (mPauseAuth) {
+            0
+        } else 255 // ViewModels handle animating alpha values
+    }
+
+    override fun getDrawable(): UdfpsDrawable {
+        return fingerprintDrawablePlaceHolder
+    }
+
+    fun useExpandedOverlay(useExpandedOverlay: Boolean) {
+        mUseExpandedOverlay = useExpandedOverlay
+    }
+
+    fun isVisible(): Boolean {
+        return visible
+    }
+
+    fun setVisible(isVisible: Boolean) {
+        visible = isVisible
+        isPauseAuth = !visible
+    }
+}

packages/SystemUI/src/com/android/systemui/biometrics/UdfpsKeyguardViewControllerLegacy.kt

@@ -34,6 +34,7 @@ import com.android.systemui.bouncer.domain.interactor.PrimaryBouncerInteractor
 import com.android.systemui.dump.DumpManager
 import com.android.systemui.flags.FeatureFlags
 import com.android.systemui.flags.Flags
+import com.android.systemui.keyguard.ui.adapter.UdfpsKeyguardViewControllerAdapter
 import com.android.systemui.lifecycle.repeatWhenAttached
 import com.android.systemui.plugins.statusbar.StatusBarStateController
 import com.android.systemui.shade.ShadeExpansionListener
@@ -80,7 +81,8 @@ constructor(
         shadeExpansionStateManager,
         systemUIDialogManager,
         dumpManager,
-    ) {
+    ),
+    UdfpsKeyguardViewControllerAdapter {
     private val useExpandedOverlay: Boolean =
         featureFlags.isEnabled(Flags.UDFPS_NEW_TOUCH_DETECTION)
     private var showingUdfpsBouncer = false

packages/SystemUI/src/com/android/systemui/biometrics/ui/controller/UdfpsKeyguardViewController.kt

@@ -0,0 +1,77 @@
+/*
+ * 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.biometrics.ui.controller
+
+import com.android.systemui.biometrics.UdfpsAnimationViewController
+import com.android.systemui.biometrics.UdfpsKeyguardView
+import com.android.systemui.bouncer.domain.interactor.AlternateBouncerInteractor
+import com.android.systemui.dump.DumpManager
+import com.android.systemui.keyguard.ui.adapter.UdfpsKeyguardViewControllerAdapter
+import com.android.systemui.keyguard.ui.viewmodel.UdfpsKeyguardViewModels
+import com.android.systemui.plugins.statusbar.StatusBarStateController
+import com.android.systemui.shade.ShadeExpansionStateManager
+import com.android.systemui.statusbar.phone.SystemUIDialogManager
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+
+/** Class that coordinates non-HBM animations during keyguard authentication. */
+@ExperimentalCoroutinesApi
+open class UdfpsKeyguardViewController(
+    val view: UdfpsKeyguardView,
+    statusBarStateController: StatusBarStateController,
+    shadeExpansionStateManager: ShadeExpansionStateManager,
+    systemUIDialogManager: SystemUIDialogManager,
+    dumpManager: DumpManager,
+    private val alternateBouncerInteractor: AlternateBouncerInteractor,
+    udfpsKeyguardViewModels: UdfpsKeyguardViewModels,
+) :
+    UdfpsAnimationViewController<UdfpsKeyguardView>(
+        view,
+        statusBarStateController,
+        shadeExpansionStateManager,
+        systemUIDialogManager,
+        dumpManager,
+    ),
+    UdfpsKeyguardViewControllerAdapter {
+    override val tag: String
+        get() = TAG
+
+    init {
+        udfpsKeyguardViewModels.bindViews(view)
+    }
+
+    public override fun onViewAttached() {
+        super.onViewAttached()
+        alternateBouncerInteractor.setAlternateBouncerUIAvailable(true)
+    }
+
+    public override fun onViewDetached() {
+        super.onViewDetached()
+        alternateBouncerInteractor.setAlternateBouncerUIAvailable(false)
+    }
+
+    override fun shouldPauseAuth(): Boolean {
+        return !view.isVisible()
+    }
+
+    override fun listenForTouchesOutsideView(): Boolean {
+        return true
+    }
+
+    companion object {
+        private const val TAG = "UdfpsKeyguardViewController"
+    }
+}

packages/SystemUI/src/com/android/systemui/keyguard/domain/interactor/FromOccludedTransitionInteractor.kt

@@ -156,7 +156,12 @@ constructor(
 
     override fun getDefaultAnimatorForTransitionsToState(toState: KeyguardState): ValueAnimator {
         return ValueAnimator().apply {
-            interpolator = Interpolators.LINEAR
+            interpolator =
+                when (toState) {
+                    KeyguardState.ALTERNATE_BOUNCER -> Interpolators.FAST_OUT_SLOW_IN
+                    else -> Interpolators.LINEAR
+                }
+
             duration =
                 when (toState) {
                     KeyguardState.LOCKSCREEN -> TO_LOCKSCREEN_DURATION

packages/SystemUI/src/com/android/systemui/keyguard/domain/interactor/KeyguardTransitionInteractor.kt

@@ -21,6 +21,7 @@ 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.KeyguardState
+import com.android.systemui.keyguard.shared.model.KeyguardState.ALTERNATE_BOUNCER
 import com.android.systemui.keyguard.shared.model.KeyguardState.AOD
 import com.android.systemui.keyguard.shared.model.KeyguardState.DREAMING
 import com.android.systemui.keyguard.shared.model.KeyguardState.GONE
@@ -61,6 +62,26 @@ constructor(
     val fromDreamingTransition: Flow<TransitionStep> =
         repository.transitions.filter { step -> step.from == DREAMING }
 
+    /** (any)->Lockscreen transition information */
+    val anyStateToLockscreenTransition: Flow<TransitionStep> =
+        repository.transitions.filter { step -> step.to == LOCKSCREEN }
+
+    /** (any)->Occluded transition information */
+    val anyStateToOccludedTransition: Flow<TransitionStep> =
+        repository.transitions.filter { step -> step.to == OCCLUDED }
+
+    /** (any)->PrimaryBouncer transition information */
+    val anyStateToPrimaryBouncerTransition: Flow<TransitionStep> =
+        repository.transitions.filter { step -> step.to == PRIMARY_BOUNCER }
+
+    /** (any)->Dreaming transition information */
+    val anyStateToDreamingTransition: Flow<TransitionStep> =
+        repository.transitions.filter { step -> step.to == DREAMING }
+
+    /** (any)->AlternateBouncer transition information */
+    val anyStateToAlternateBouncerTransition: Flow<TransitionStep> =
+        repository.transitions.filter { step -> step.to == ALTERNATE_BOUNCER }
+
     /** AOD->LOCKSCREEN transition information. */
     val aodToLockscreenTransition: Flow<TransitionStep> = repository.transition(AOD, LOCKSCREEN)
 
@@ -68,6 +89,9 @@ constructor(
     val dreamingToLockscreenTransition: Flow<TransitionStep> =
         repository.transition(DREAMING, LOCKSCREEN)
 
+    /** GONE->AOD transition information. */
+    val goneToAodTransition: Flow<TransitionStep> = repository.transition(GONE, AOD)
+
     /** GONE->DREAMING transition information. */
     val goneToDreamingTransition: Flow<TransitionStep> = repository.transition(GONE, DREAMING)
 

packages/SystemUI/src/com/android/systemui/keyguard/domain/interactor/UdfpsKeyguardInteractor.kt

@@ -0,0 +1,65 @@
+/*
+ *  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.domain.interactor
+
+import android.animation.FloatEvaluator
+import android.animation.IntEvaluator
+import com.android.systemui.common.ui.data.repository.ConfigurationRepository
+import com.android.systemui.dagger.SysUISingleton
+import javax.inject.Inject
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.combine
+
+/** Encapsulates business logic for transitions between UDFPS states on the keyguard. */
+@ExperimentalCoroutinesApi
+@SysUISingleton
+class UdfpsKeyguardInteractor
+@Inject
+constructor(
+    configRepo: ConfigurationRepository,
+    burnInInteractor: BurnInInteractor,
+    keyguardInteractor: KeyguardInteractor,
+) {
+    private val intEvaluator = IntEvaluator()
+    private val floatEvaluator = FloatEvaluator()
+
+    val dozeAmount = keyguardInteractor.dozeAmount
+    val scaleForResolution = configRepo.scaleForResolution
+
+    /** Burn-in offsets for the UDFPS view to mitigate burn-in on AOD. */
+    val burnInOffsets: Flow<BurnInOffsets> =
+        combine(
+            keyguardInteractor.dozeAmount,
+            burnInInteractor.udfpsBurnInXOffset,
+            burnInInteractor.udfpsBurnInYOffset,
+            burnInInteractor.udfpsBurnInProgress
+        ) { dozeAmount, fullyDozingBurnInX, fullyDozingBurnInY, fullyDozingBurnInProgress ->
+            BurnInOffsets(
+                intEvaluator.evaluate(dozeAmount, 0, fullyDozingBurnInX),
+                intEvaluator.evaluate(dozeAmount, 0, fullyDozingBurnInY),
+                floatEvaluator.evaluate(dozeAmount, 0, fullyDozingBurnInProgress),
+            )
+        }
+}
+
+data class BurnInOffsets(
+    val burnInXOffset: Int, // current x burn in offset based on the aodTransitionAmount
+    val burnInYOffset: Int, // current y burn in offset based on the aodTransitionAmount
+    val burnInProgress: Float, // current progress based on the aodTransitionAmount
+)

packages/SystemUI/src/com/android/systemui/keyguard/ui/adapter/UdfpsKeyguardViewControllerAdapter.kt

@@ -0,0 +1,25 @@
+/*
+ * 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.adapter
+
+/**
+ * Temporary adapter class while
+ * [com.android.systemui.biometrics.ui.controller.UdfpsKeyguardViewController] is being refactored
+ * before [com.android.systemui.biometrics.UdfpsKeyguardViewControllerLegacy] is removed.
+ *
+ * TODO (b/278719514): Delete once udfps keyguard view is fully refactored.
+ */
+interface UdfpsKeyguardViewControllerAdapter

packages/SystemUI/src/com/android/systemui/keyguard/ui/binder/UdfpsAodFingerprintViewBinder.kt

@@ -0,0 +1,60 @@
+/*
+ * 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.binder
+
+import androidx.lifecycle.Lifecycle
+import androidx.lifecycle.repeatOnLifecycle
+import com.airbnb.lottie.LottieAnimationView
+import com.android.systemui.keyguard.ui.viewmodel.UdfpsAodViewModel
+import com.android.systemui.lifecycle.repeatWhenAttached
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.launch
+
+@ExperimentalCoroutinesApi
+object UdfpsAodFingerprintViewBinder {
+
+    /**
+     * Drives UI for the UDFPS aod fingerprint view. See [UdfpsFingerprintViewBinder] and
+     * [UdfpsBackgroundViewBinder].
+     */
+    @JvmStatic
+    fun bind(
+        view: LottieAnimationView,
+        viewModel: UdfpsAodViewModel,
+    ) {
+        view.repeatWhenAttached {
+            repeatOnLifecycle(Lifecycle.State.STARTED) {
+                launch {
+                    viewModel.burnInOffsets.collect { burnInOffsets ->
+                        view.progress = burnInOffsets.burnInProgress
+                        view.translationX = burnInOffsets.burnInXOffset.toFloat()
+                        view.translationY = burnInOffsets.burnInYOffset.toFloat()
+                    }
+                }
+
+                launch { viewModel.alpha.collect { alpha -> view.alpha = alpha } }
+
+                launch {
+                    viewModel.padding.collect { padding ->
+                        view.setPadding(padding, padding, padding, padding)
+                    }
+                }
+            }
+        }
+    }
+}

packages/SystemUI/src/com/android/systemui/keyguard/ui/binder/UdfpsBackgroundViewBinder.kt

@@ -0,0 +1,54 @@
+/*
+ * 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.binder
+
+import android.content.res.ColorStateList
+import android.widget.ImageView
+import androidx.lifecycle.Lifecycle
+import androidx.lifecycle.repeatOnLifecycle
+import com.android.systemui.keyguard.ui.viewmodel.BackgroundViewModel
+import com.android.systemui.lifecycle.repeatWhenAttached
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.launch
+
+@ExperimentalCoroutinesApi
+object UdfpsBackgroundViewBinder {
+
+    /**
+     * Drives UI for the udfps background view. See [UdfpsAodFingerprintViewBinder] and
+     * [UdfpsFingerprintViewBinder].
+     */
+    @JvmStatic
+    fun bind(
+        view: ImageView,
+        viewModel: BackgroundViewModel,
+    ) {
+        view.repeatWhenAttached {
+            repeatOnLifecycle(Lifecycle.State.STARTED) {
+                launch {
+                    viewModel.transition.collect {
+                        view.alpha = it.alpha
+                        view.scaleX = it.scale
+                        view.scaleY = it.scale
+                        view.imageTintList = ColorStateList.valueOf(it.color)
+                    }
+                }
+            }
+        }
+    }
+}

packages/SystemUI/src/com/android/systemui/keyguard/ui/binder/UdfpsFingerprintViewBinder.kt

@@ -0,0 +1,86 @@
+/*
+ * 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.binder
+
+import android.graphics.PorterDuff
+import android.graphics.PorterDuffColorFilter
+import androidx.lifecycle.Lifecycle
+import androidx.lifecycle.repeatOnLifecycle
+import com.airbnb.lottie.LottieAnimationView
+import com.airbnb.lottie.LottieProperty
+import com.airbnb.lottie.model.KeyPath
+import com.android.systemui.keyguard.ui.viewmodel.FingerprintViewModel
+import com.android.systemui.lifecycle.repeatWhenAttached
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.launch
+
+@ExperimentalCoroutinesApi
+object UdfpsFingerprintViewBinder {
+    private var udfpsIconColor = 0
+
+    /**
+     * Drives UI for the UDFPS fingerprint view when it's NOT on aod. See
+     * [UdfpsAodFingerprintViewBinder] and [UdfpsBackgroundViewBinder].
+     */
+    @JvmStatic
+    fun bind(
+        view: LottieAnimationView,
+        viewModel: FingerprintViewModel,
+    ) {
+        view.repeatWhenAttached {
+            repeatOnLifecycle(Lifecycle.State.STARTED) {
+                launch {
+                    viewModel.transition.collect {
+                        view.alpha = it.alpha
+                        view.scaleX = it.scale
+                        view.scaleY = it.scale
+                        if (udfpsIconColor != (it.color)) {
+                            udfpsIconColor = it.color
+                            view.invalidate()
+                        }
+                    }
+                }
+
+                launch {
+                    viewModel.burnInOffsets.collect { burnInOffsets ->
+                        view.translationX = burnInOffsets.burnInXOffset.toFloat()
+                        view.translationY = burnInOffsets.burnInYOffset.toFloat()
+                    }
+                }
+
+                launch {
+                    viewModel.dozeAmount.collect { dozeAmount ->
+                        // Lottie progress represents: aod=0 to lockscreen=1
+                        view.progress = 1f - dozeAmount
+                    }
+                }
+
+                launch {
+                    viewModel.padding.collect { padding ->
+                        view.setPadding(padding, padding, padding, padding)
+                    }
+                }
+            }
+        }
+
+        // Add a callback that updates the color to `udfpsIconColor` whenever invalidate is called
+        view.addValueCallback(KeyPath("**"), LottieProperty.COLOR_FILTER) {
+            PorterDuffColorFilter(udfpsIconColor, PorterDuff.Mode.SRC_ATOP)
+        }
+    }
+}

packages/SystemUI/src/com/android/systemui/keyguard/ui/binder/UdfpsKeyguardInternalViewBinder.kt

@@ -0,0 +1,55 @@
+/*
+ * 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.biometrics.ui.binder
+
+import android.view.View
+import com.android.systemui.R
+import com.android.systemui.keyguard.ui.binder.UdfpsAodFingerprintViewBinder
+import com.android.systemui.keyguard.ui.binder.UdfpsBackgroundViewBinder
+import com.android.systemui.keyguard.ui.binder.UdfpsFingerprintViewBinder
+import com.android.systemui.keyguard.ui.viewmodel.BackgroundViewModel
+import com.android.systemui.keyguard.ui.viewmodel.FingerprintViewModel
+import com.android.systemui.keyguard.ui.viewmodel.UdfpsAodViewModel
+import com.android.systemui.keyguard.ui.viewmodel.UdfpsKeyguardInternalViewModel
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+
+@ExperimentalCoroutinesApi
+object UdfpsKeyguardInternalViewBinder {
+
+    @JvmStatic
+    fun bind(
+        view: View,
+        viewModel: UdfpsKeyguardInternalViewModel,
+        aodViewModel: UdfpsAodViewModel,
+        fingerprintViewModel: FingerprintViewModel,
+        backgroundViewModel: BackgroundViewModel,
+    ) {
+        view.accessibilityDelegate = viewModel.accessibilityDelegate
+
+        // bind child views
+        UdfpsAodFingerprintViewBinder.bind(view.findViewById(R.id.udfps_aod_fp), aodViewModel)
+        UdfpsFingerprintViewBinder.bind(
+            view.findViewById(R.id.udfps_lockscreen_fp),
+            fingerprintViewModel
+        )
+        UdfpsBackgroundViewBinder.bind(
+            view.findViewById(R.id.udfps_keyguard_fp_bg),
+            backgroundViewModel
+        )
+    }
+}

packages/SystemUI/src/com/android/systemui/keyguard/ui/binder/UdfpsKeyguardViewBinder.kt

@@ -0,0 +1,117 @@
+/*
+ * 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.binder
+
+import android.graphics.RectF
+import android.view.View
+import android.widget.FrameLayout
+import androidx.asynclayoutinflater.view.AsyncLayoutInflater
+import androidx.lifecycle.Lifecycle
+import androidx.lifecycle.repeatOnLifecycle
+import com.android.systemui.R
+import com.android.systemui.biometrics.UdfpsKeyguardView
+import com.android.systemui.biometrics.ui.binder.UdfpsKeyguardInternalViewBinder
+import com.android.systemui.keyguard.ui.viewmodel.BackgroundViewModel
+import com.android.systemui.keyguard.ui.viewmodel.FingerprintViewModel
+import com.android.systemui.keyguard.ui.viewmodel.UdfpsAodViewModel
+import com.android.systemui.keyguard.ui.viewmodel.UdfpsKeyguardInternalViewModel
+import com.android.systemui.keyguard.ui.viewmodel.UdfpsKeyguardViewModel
+import com.android.systemui.lifecycle.repeatWhenAttached
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.launch
+
+@ExperimentalCoroutinesApi
+object UdfpsKeyguardViewBinder {
+    /**
+     * Drives UI for the keyguard UDFPS view. Inflates child views on a background thread. For view
+     * binders for its child views, see [UdfpsFingerprintViewBinder], [UdfpsBackgroundViewBinder] &
+     * [UdfpsAodFingerprintViewBinder].
+     */
+    @JvmStatic
+    fun bind(
+        view: UdfpsKeyguardView,
+        viewModel: UdfpsKeyguardViewModel,
+        udfpsKeyguardInternalViewModel: UdfpsKeyguardInternalViewModel,
+        aodViewModel: UdfpsAodViewModel,
+        fingerprintViewModel: FingerprintViewModel,
+        backgroundViewModel: BackgroundViewModel,
+    ) {
+        view.useExpandedOverlay(viewModel.useExpandedOverlay())
+
+        val layoutInflaterFinishListener =
+            AsyncLayoutInflater.OnInflateFinishedListener { inflatedInternalView, _, parent ->
+                UdfpsKeyguardInternalViewBinder.bind(
+                    inflatedInternalView,
+                    udfpsKeyguardInternalViewModel,
+                    aodViewModel,
+                    fingerprintViewModel,
+                    backgroundViewModel,
+                )
+                if (viewModel.useExpandedOverlay()) {
+                    val lp = inflatedInternalView.layoutParams as FrameLayout.LayoutParams
+                    lp.width = viewModel.sensorBounds.width()
+                    lp.height = viewModel.sensorBounds.height()
+                    val relativeToView =
+                        getBoundsRelativeToView(
+                            inflatedInternalView,
+                            RectF(viewModel.sensorBounds),
+                        )
+                    lp.setMarginsRelative(
+                        relativeToView.left.toInt(),
+                        relativeToView.top.toInt(),
+                        relativeToView.right.toInt(),
+                        relativeToView.bottom.toInt(),
+                    )
+                    parent!!.addView(inflatedInternalView, lp)
+                } else {
+                    parent!!.addView(inflatedInternalView)
+                }
+            }
+        val inflater = AsyncLayoutInflater(view.context)
+        inflater.inflate(R.layout.udfps_keyguard_view_internal, view, layoutInflaterFinishListener)
+
+        view.repeatWhenAttached {
+            repeatOnLifecycle(Lifecycle.State.CREATED) {
+                launch {
+                    combine(aodViewModel.isVisible, fingerprintViewModel.visible) {
+                            isAodVisible,
+                            isFingerprintVisible ->
+                            isAodVisible || isFingerprintVisible
+                        }
+                        .collect { view.setVisible(it) }
+                }
+            }
+        }
+    }
+
+    /**
+     * Converts coordinates of RectF relative to the screen to coordinates relative to this view.
+     *
+     * @param bounds RectF based off screen coordinates in current orientation
+     */
+    private fun getBoundsRelativeToView(view: View, bounds: RectF): RectF {
+        val pos: IntArray = view.locationOnScreen
+        return RectF(
+            bounds.left - pos[0],
+            bounds.top - pos[1],
+            bounds.right - pos[0],
+            bounds.bottom - pos[1]
+        )
+    }
+}

packages/SystemUI/src/com/android/systemui/keyguard/ui/viewmodel/UdfpsAodViewModel.kt

@@ -0,0 +1,47 @@
+/*
+ * 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.viewmodel
+
+import android.content.Context
+import com.android.systemui.R
+import com.android.systemui.keyguard.domain.interactor.BurnInOffsets
+import com.android.systemui.keyguard.domain.interactor.UdfpsKeyguardInteractor
+import javax.inject.Inject
+import kotlin.math.roundToInt
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.map
+
+/** View-model for UDFPS AOD view. */
+@ExperimentalCoroutinesApi
+class UdfpsAodViewModel
+@Inject
+constructor(
+    val interactor: UdfpsKeyguardInteractor,
+    val context: Context,
+) {
+    val alpha: Flow<Float> = interactor.dozeAmount
+    val burnInOffsets: Flow<BurnInOffsets> = interactor.burnInOffsets
+    val isVisible: Flow<Boolean> = alpha.map { it != 0f }
+
+    // Padding between the fingerprint icon and its bounding box in pixels.
+    val padding: Flow<Int> =
+        interactor.scaleForResolution.map { scale ->
+            (context.resources.getDimensionPixelSize(R.dimen.lock_icon_padding) * scale)
+                .roundToInt()
+        }
+}

packages/SystemUI/src/com/android/systemui/keyguard/ui/viewmodel/UdfpsKeyguardInternalViewModel.kt

@@ -0,0 +1,26 @@
+/*
+ * 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.viewmodel
+
+import com.android.systemui.biometrics.UdfpsKeyguardAccessibilityDelegate
+import javax.inject.Inject
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+
+@ExperimentalCoroutinesApi
+class UdfpsKeyguardInternalViewModel
+@Inject
+constructor(val accessibilityDelegate: UdfpsKeyguardAccessibilityDelegate)

packages/SystemUI/src/com/android/systemui/keyguard/ui/viewmodel/UdfpsKeyguardViewModel.kt

@@ -0,0 +1,36 @@
+/*
+ * 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.viewmodel
+
+import android.graphics.Rect
+import com.android.systemui.flags.FeatureFlags
+import com.android.systemui.flags.Flags
+import javax.inject.Inject
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+
+@ExperimentalCoroutinesApi
+class UdfpsKeyguardViewModel
+@Inject
+constructor(
+    private val featureFlags: FeatureFlags,
+) {
+    var sensorBounds: Rect = Rect()
+
+    fun useExpandedOverlay(): Boolean {
+        return featureFlags.isEnabled(Flags.UDFPS_NEW_TOUCH_DETECTION)
+    }
+}

packages/SystemUI/src/com/android/systemui/keyguard/ui/viewmodel/UdfpsKeyguardViewModels.kt

@@ -0,0 +1,36 @@
+package com.android.systemui.keyguard.ui.viewmodel
+
+import android.graphics.Rect
+import com.android.systemui.biometrics.UdfpsKeyguardView
+import com.android.systemui.dagger.SysUISingleton
+import com.android.systemui.keyguard.ui.binder.UdfpsKeyguardViewBinder
+import javax.inject.Inject
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+
+@ExperimentalCoroutinesApi
+@SysUISingleton
+class UdfpsKeyguardViewModels
+@Inject
+constructor(
+    private val viewModel: UdfpsKeyguardViewModel,
+    private val internalViewModel: UdfpsKeyguardInternalViewModel,
+    private val aodViewModel: UdfpsAodViewModel,
+    private val lockscreenFingerprintViewModel: FingerprintViewModel,
+    private val lockscreenBackgroundViewModel: BackgroundViewModel,
+) {
+
+    fun setSensorBounds(sensorBounds: Rect) {
+        viewModel.sensorBounds = sensorBounds
+    }
+
+    fun bindViews(view: UdfpsKeyguardView) {
+        UdfpsKeyguardViewBinder.bind(
+            view,
+            viewModel,
+            internalViewModel,
+            aodViewModel,
+            lockscreenFingerprintViewModel,
+            lockscreenBackgroundViewModel
+        )
+    }
+}

packages/SystemUI/src/com/android/systemui/keyguard/ui/viewmodel/UdfpsLockscreenViewModel.kt

@@ -0,0 +1,162 @@
+/*
+ * 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.viewmodel
+
+import android.content.Context
+import androidx.annotation.ColorInt
+import com.android.settingslib.Utils.getColorAttrDefaultColor
+import com.android.systemui.R
+import com.android.systemui.keyguard.domain.interactor.BurnInOffsets
+import com.android.systemui.keyguard.domain.interactor.KeyguardTransitionInteractor
+import com.android.systemui.keyguard.domain.interactor.UdfpsKeyguardInteractor
+import com.android.systemui.keyguard.shared.model.KeyguardState
+import javax.inject.Inject
+import kotlin.math.roundToInt
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.flow.merge
+
+/** View-model for UDFPS lockscreen views. */
+@ExperimentalCoroutinesApi
+open class UdfpsLockscreenViewModel(
+    context: Context,
+    lockscreenColorResId: Int,
+    alternateBouncerColorResId: Int,
+    transitionInteractor: KeyguardTransitionInteractor,
+) {
+    private val toLockscreen: Flow<TransitionViewModel> =
+        transitionInteractor.anyStateToLockscreenTransition.map {
+            TransitionViewModel(
+                alpha =
+                    if (it.from == KeyguardState.AOD) {
+                        it.value // animate
+                    } else {
+                        1f
+                    },
+                scale = 1f,
+                color = getColorAttrDefaultColor(context, lockscreenColorResId),
+            )
+        }
+
+    private val toAlternateBouncer: Flow<TransitionViewModel> =
+        transitionInteractor.anyStateToAlternateBouncerTransition.map {
+            TransitionViewModel(
+                alpha = 1f,
+                scale =
+                    if (visibleInKeyguardState(it.from)) {
+                        1f
+                    } else {
+                        it.value
+                    },
+                color = getColorAttrDefaultColor(context, alternateBouncerColorResId),
+            )
+        }
+
+    private val fadeOut: Flow<TransitionViewModel> =
+        merge(
+                transitionInteractor.anyStateToGoneTransition,
+                transitionInteractor.anyStateToAodTransition,
+                transitionInteractor.anyStateToOccludedTransition,
+                transitionInteractor.anyStateToPrimaryBouncerTransition,
+                transitionInteractor.anyStateToDreamingTransition,
+            )
+            .map {
+                TransitionViewModel(
+                    alpha =
+                        if (visibleInKeyguardState(it.from)) {
+                            1f - it.value
+                        } else {
+                            0f
+                        },
+                    scale = 1f,
+                    color =
+                        if (it.from == KeyguardState.ALTERNATE_BOUNCER) {
+                            getColorAttrDefaultColor(context, alternateBouncerColorResId)
+                        } else {
+                            getColorAttrDefaultColor(context, lockscreenColorResId)
+                        },
+                )
+            }
+
+    private fun visibleInKeyguardState(state: KeyguardState): Boolean {
+        return when (state) {
+            KeyguardState.OFF,
+            KeyguardState.DOZING,
+            KeyguardState.DREAMING,
+            KeyguardState.AOD,
+            KeyguardState.PRIMARY_BOUNCER,
+            KeyguardState.GONE,
+            KeyguardState.OCCLUDED -> false
+            KeyguardState.LOCKSCREEN,
+            KeyguardState.ALTERNATE_BOUNCER -> true
+        }
+    }
+
+    val transition: Flow<TransitionViewModel> =
+        merge(
+            toAlternateBouncer,
+            toLockscreen,
+            fadeOut,
+        )
+    val visible: Flow<Boolean> = transition.map { it.alpha != 0f }
+}
+
+@ExperimentalCoroutinesApi
+class FingerprintViewModel
+@Inject
+constructor(
+    val context: Context,
+    transitionInteractor: KeyguardTransitionInteractor,
+    interactor: UdfpsKeyguardInteractor,
+) :
+    UdfpsLockscreenViewModel(
+        context,
+        android.R.attr.textColorPrimary,
+        com.android.internal.R.attr.materialColorOnPrimaryFixed,
+        transitionInteractor,
+    ) {
+    val dozeAmount: Flow<Float> = interactor.dozeAmount
+    val burnInOffsets: Flow<BurnInOffsets> = interactor.burnInOffsets
+
+    // Padding between the fingerprint icon and its bounding box in pixels.
+    val padding: Flow<Int> =
+        interactor.scaleForResolution.map { scale ->
+            (context.resources.getDimensionPixelSize(R.dimen.lock_icon_padding) * scale)
+                .roundToInt()
+        }
+}
+
+@ExperimentalCoroutinesApi
+class BackgroundViewModel
+@Inject
+constructor(
+    val context: Context,
+    transitionInteractor: KeyguardTransitionInteractor,
+) :
+    UdfpsLockscreenViewModel(
+        context,
+        com.android.internal.R.attr.colorSurface,
+        com.android.internal.R.attr.materialColorPrimaryFixed,
+        transitionInteractor,
+    )
+
+data class TransitionViewModel(
+    val alpha: Float,
+    val scale: Float,
+    @ColorInt val color: Int,
+)

packages/SystemUI/tests/src/com/android/systemui/biometrics/UdfpsControllerOverlayTest.kt

@@ -43,11 +43,12 @@ import com.android.systemui.R
 import com.android.systemui.RoboPilotTest
 import com.android.systemui.SysuiTestCase
 import com.android.systemui.animation.ActivityLaunchAnimator
+import com.android.systemui.bouncer.domain.interactor.AlternateBouncerInteractor
+import com.android.systemui.bouncer.domain.interactor.PrimaryBouncerInteractor
 import com.android.systemui.dump.DumpManager
 import com.android.systemui.flags.FeatureFlags
 import com.android.systemui.flags.Flags
-import com.android.systemui.bouncer.domain.interactor.AlternateBouncerInteractor
-import com.android.systemui.bouncer.domain.interactor.PrimaryBouncerInteractor
+import com.android.systemui.keyguard.ui.viewmodel.UdfpsKeyguardViewModels
 import com.android.systemui.plugins.statusbar.StatusBarStateController
 import com.android.systemui.shade.ShadeExpansionStateManager
 import com.android.systemui.statusbar.LockscreenShadeTransitionController
@@ -58,6 +59,7 @@ import com.android.systemui.statusbar.policy.ConfigurationController
 import com.android.systemui.statusbar.policy.KeyguardStateController
 import com.android.systemui.util.settings.SecureSettings
 import com.google.common.truth.Truth.assertThat
+import kotlinx.coroutines.ExperimentalCoroutinesApi
 import org.junit.Before
 import org.junit.Rule
 import org.junit.Test
@@ -70,6 +72,7 @@ import org.mockito.Mock
 import org.mockito.Mockito.mock
 import org.mockito.Mockito.verify
 import org.mockito.junit.MockitoJUnit
+import javax.inject.Provider
 import org.mockito.Mockito.`when` as whenever
 
 private const val REQUEST_ID = 2L
@@ -80,6 +83,7 @@ private const val DISPLAY_HEIGHT = 1920
 private const val SENSOR_WIDTH = 30
 private const val SENSOR_HEIGHT = 60
 
+@ExperimentalCoroutinesApi
 @SmallTest
 @RoboPilotTest
 @RunWith(AndroidJUnit4::class)
@@ -116,6 +120,7 @@ class UdfpsControllerOverlayTest : SysuiTestCase() {
     @Mock private lateinit var udfpsUtils: UdfpsUtils
     @Mock private lateinit var udfpsKeyguardAccessibilityDelegate:
             UdfpsKeyguardAccessibilityDelegate
+    @Mock private lateinit var udfpsKeyguardViewModels: Provider<UdfpsKeyguardViewModels>
     @Captor private lateinit var layoutParamsCaptor: ArgumentCaptor<WindowManager.LayoutParams>
 
     private val onTouch = { _: View, _: MotionEvent, _: Boolean -> true }
@@ -148,6 +153,7 @@ class UdfpsControllerOverlayTest : SysuiTestCase() {
             controllerCallback, onTouch, activityLaunchAnimator, featureFlags,
             primaryBouncerInteractor, alternateBouncerInteractor, isDebuggable, udfpsUtils,
             udfpsKeyguardAccessibilityDelegate,
+            udfpsKeyguardViewModels,
         )
         block()
     }

packages/SystemUI/tests/src/com/android/systemui/biometrics/UdfpsControllerTest.java

@@ -83,13 +83,14 @@ import com.android.systemui.biometrics.udfps.InteractionEvent;
 import com.android.systemui.biometrics.udfps.NormalizedTouchData;
 import com.android.systemui.biometrics.udfps.SinglePointerTouchProcessor;
 import com.android.systemui.biometrics.udfps.TouchProcessorResult;
+import com.android.systemui.bouncer.domain.interactor.AlternateBouncerInteractor;
+import com.android.systemui.bouncer.domain.interactor.PrimaryBouncerInteractor;
 import com.android.systemui.dump.DumpManager;
 import com.android.systemui.flags.FeatureFlags;
 import com.android.systemui.flags.Flags;
 import com.android.systemui.keyguard.ScreenLifecycle;
-import com.android.systemui.bouncer.domain.interactor.AlternateBouncerInteractor;
 import com.android.systemui.keyguard.domain.interactor.KeyguardFaceAuthInteractor;
-import com.android.systemui.bouncer.domain.interactor.PrimaryBouncerInteractor;
+import com.android.systemui.keyguard.ui.viewmodel.UdfpsKeyguardViewModels;
 import com.android.systemui.log.SessionTracker;
 import com.android.systemui.plugins.FalsingManager;
 import com.android.systemui.plugins.statusbar.StatusBarStateController;
@@ -219,6 +220,8 @@ public class UdfpsControllerTest extends SysuiTestCase {
     private SecureSettings mSecureSettings;
     @Mock
     private UdfpsKeyguardAccessibilityDelegate mUdfpsKeyguardAccessibilityDelegate;
+    @Mock
+    private Provider<UdfpsKeyguardViewModels> mUdfpsKeyguardViewModels;
 
     // Capture listeners so that they can be used to send events
     @Captor
@@ -318,7 +321,7 @@ public class UdfpsControllerTest extends SysuiTestCase {
                 mPrimaryBouncerInteractor, mSinglePointerTouchProcessor, mSessionTracker,
                 mAlternateBouncerInteractor, mSecureSettings, mInputManager, mUdfpsUtils,
                 mock(KeyguardFaceAuthInteractor.class),
-                mUdfpsKeyguardAccessibilityDelegate);
+                mUdfpsKeyguardAccessibilityDelegate, mUdfpsKeyguardViewModels);
         verify(mFingerprintManager).setUdfpsOverlayController(mOverlayCaptor.capture());
         mOverlayController = mOverlayCaptor.getValue();
         verify(mScreenLifecycle).addObserver(mScreenObserverCaptor.capture());

packages/SystemUI/tests/src/com/android/systemui/keyguard/domain/interactor/UdfpsKeyguardInteractorTest.kt

@@ -0,0 +1,168 @@
+/*
+ * 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.domain.interactor
+
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.filters.SmallTest
+import com.android.systemui.SysuiTestCase
+import com.android.systemui.bouncer.data.repository.FakeKeyguardBouncerRepository
+import com.android.systemui.bouncer.data.repository.KeyguardBouncerRepository
+import com.android.systemui.common.ui.data.repository.FakeConfigurationRepository
+import com.android.systemui.coroutines.collectLastValue
+import com.android.systemui.doze.util.BurnInHelperWrapper
+import com.android.systemui.flags.FakeFeatureFlags
+import com.android.systemui.flags.Flags
+import com.android.systemui.keyguard.data.repository.FakeCommandQueue
+import com.android.systemui.keyguard.data.repository.FakeKeyguardRepository
+import com.android.systemui.keyguard.shared.model.StatusBarState
+import com.android.systemui.keyguard.shared.model.WakeSleepReason
+import com.android.systemui.keyguard.shared.model.WakefulnessModel
+import com.android.systemui.keyguard.shared.model.WakefulnessState
+import com.android.systemui.util.mockito.eq
+import com.android.systemui.util.mockito.whenever
+import com.android.systemui.util.time.FakeSystemClock
+import com.google.common.truth.Truth.assertThat
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.test.TestScope
+import kotlinx.coroutines.test.runCurrent
+import kotlinx.coroutines.test.runTest
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mockito.ArgumentMatchers.anyInt
+import org.mockito.Mock
+import org.mockito.MockitoAnnotations
+
+@ExperimentalCoroutinesApi
+@SmallTest
+@RunWith(AndroidJUnit4::class)
+class UdfpsKeyguardInteractorTest : SysuiTestCase() {
+    private val burnInProgress = 1f
+    private val burnInYOffset = 20
+    private val burnInXOffset = 10
+
+    private lateinit var testScope: TestScope
+    private lateinit var configRepository: FakeConfigurationRepository
+    private lateinit var bouncerRepository: KeyguardBouncerRepository
+    private lateinit var keyguardRepository: FakeKeyguardRepository
+    private lateinit var fakeCommandQueue: FakeCommandQueue
+    private lateinit var featureFlags: FakeFeatureFlags
+    private lateinit var burnInInteractor: BurnInInteractor
+
+    @Mock private lateinit var burnInHelper: BurnInHelperWrapper
+
+    private lateinit var underTest: UdfpsKeyguardInteractor
+
+    @Before
+    fun setUp() {
+        MockitoAnnotations.initMocks(this)
+
+        testScope = TestScope()
+        configRepository = FakeConfigurationRepository()
+        keyguardRepository = FakeKeyguardRepository()
+        bouncerRepository = FakeKeyguardBouncerRepository()
+        fakeCommandQueue = FakeCommandQueue()
+        featureFlags =
+            FakeFeatureFlags().apply {
+                set(Flags.REFACTOR_UDFPS_KEYGUARD_VIEWS, true)
+                set(Flags.FACE_AUTH_REFACTOR, false)
+            }
+        burnInInteractor =
+            BurnInInteractor(
+                context,
+                burnInHelper,
+                testScope.backgroundScope,
+                configRepository,
+                FakeSystemClock(),
+            )
+
+        underTest =
+            UdfpsKeyguardInteractor(
+                configRepository,
+                burnInInteractor,
+                KeyguardInteractor(
+                    keyguardRepository,
+                    fakeCommandQueue,
+                    featureFlags,
+                    bouncerRepository,
+                    configRepository,
+                ),
+            )
+    }
+
+    @Test
+    fun dozeChanges_updatesUdfpsAodModel() =
+        testScope.runTest {
+            val burnInOffsets by collectLastValue(underTest.burnInOffsets)
+            initializeBurnInOffsets()
+
+            // WHEN we're not dozing
+            setAwake()
+            runCurrent()
+
+            // THEN burn in offsets are 0
+            assertThat(burnInOffsets?.burnInProgress).isEqualTo(0f)
+            assertThat(burnInOffsets?.burnInYOffset).isEqualTo(0)
+            assertThat(burnInOffsets?.burnInXOffset).isEqualTo(0)
+
+            // WHEN we're in the middle of the doze amount change
+            keyguardRepository.setDozeAmount(.50f)
+            runCurrent()
+
+            // THEN burn in is updated (between 0 and the full offset)
+            assertThat(burnInOffsets?.burnInProgress).isGreaterThan(0f)
+            assertThat(burnInOffsets?.burnInYOffset).isGreaterThan(0)
+            assertThat(burnInOffsets?.burnInXOffset).isGreaterThan(0)
+            assertThat(burnInOffsets?.burnInProgress).isLessThan(burnInProgress)
+            assertThat(burnInOffsets?.burnInYOffset).isLessThan(burnInYOffset)
+            assertThat(burnInOffsets?.burnInXOffset).isLessThan(burnInXOffset)
+
+            // WHEN we're fully dozing
+            keyguardRepository.setDozeAmount(1f)
+            runCurrent()
+
+            // THEN burn in offsets are updated to final current values (for the given time)
+            assertThat(burnInOffsets?.burnInProgress).isEqualTo(burnInProgress)
+            assertThat(burnInOffsets?.burnInYOffset).isEqualTo(burnInYOffset)
+            assertThat(burnInOffsets?.burnInXOffset).isEqualTo(burnInXOffset)
+        }
+
+    private fun initializeBurnInOffsets() {
+        whenever(burnInHelper.burnInProgressOffset()).thenReturn(burnInProgress)
+        whenever(burnInHelper.burnInOffset(anyInt(), /* xAxis */ eq(true)))
+            .thenReturn(burnInXOffset)
+        whenever(burnInHelper.burnInOffset(anyInt(), /* xAxis */ eq(false)))
+            .thenReturn(burnInYOffset)
+    }
+
+    private fun setAwake() {
+        keyguardRepository.setDozeAmount(0f)
+        burnInInteractor.dozeTimeTick()
+
+        bouncerRepository.setAlternateVisible(false)
+        keyguardRepository.setStatusBarState(StatusBarState.KEYGUARD)
+        bouncerRepository.setPrimaryShow(false)
+        keyguardRepository.setWakefulnessModel(
+            WakefulnessModel(
+                WakefulnessState.AWAKE,
+                WakeSleepReason.POWER_BUTTON,
+                WakeSleepReason.POWER_BUTTON,
+            )
+        )
+    }
+}

packages/SystemUI/tests/src/com/android/systemui/keyguard/ui/viewmodel/UdfpsAodViewModelTest.kt

@@ -0,0 +1,149 @@
+/*
+ * 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.viewmodel
+
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.filters.SmallTest
+import com.android.systemui.RoboPilotTest
+import com.android.systemui.SysuiTestCase
+import com.android.systemui.bouncer.data.repository.FakeKeyguardBouncerRepository
+import com.android.systemui.bouncer.data.repository.KeyguardBouncerRepository
+import com.android.systemui.common.ui.data.repository.FakeConfigurationRepository
+import com.android.systemui.coroutines.collectLastValue
+import com.android.systemui.doze.util.BurnInHelperWrapper
+import com.android.systemui.flags.FakeFeatureFlags
+import com.android.systemui.flags.Flags
+import com.android.systemui.keyguard.data.repository.FakeCommandQueue
+import com.android.systemui.keyguard.data.repository.FakeKeyguardRepository
+import com.android.systemui.keyguard.domain.interactor.BurnInInteractor
+import com.android.systemui.keyguard.domain.interactor.KeyguardInteractor
+import com.android.systemui.keyguard.domain.interactor.UdfpsKeyguardInteractor
+import com.android.systemui.util.time.FakeSystemClock
+import com.google.common.truth.Truth.assertThat
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.test.TestScope
+import kotlinx.coroutines.test.runCurrent
+import kotlinx.coroutines.test.runTest
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mockito.Mock
+import org.mockito.MockitoAnnotations
+
+@ExperimentalCoroutinesApi
+@SmallTest
+@RoboPilotTest
+@RunWith(AndroidJUnit4::class)
+class UdfpsAodViewModelTest : SysuiTestCase() {
+    private val defaultPadding = 12
+    private lateinit var underTest: UdfpsAodViewModel
+
+    private lateinit var testScope: TestScope
+    private lateinit var configRepository: FakeConfigurationRepository
+    private lateinit var bouncerRepository: KeyguardBouncerRepository
+    private lateinit var keyguardRepository: FakeKeyguardRepository
+    private lateinit var fakeCommandQueue: FakeCommandQueue
+    private lateinit var featureFlags: FakeFeatureFlags
+
+    @Mock private lateinit var burnInHelper: BurnInHelperWrapper
+
+    @Before
+    fun setUp() {
+        MockitoAnnotations.initMocks(this)
+        overrideResource(com.android.systemui.R.dimen.lock_icon_padding, defaultPadding)
+        testScope = TestScope()
+        configRepository = FakeConfigurationRepository()
+        keyguardRepository = FakeKeyguardRepository()
+        bouncerRepository = FakeKeyguardBouncerRepository()
+        fakeCommandQueue = FakeCommandQueue()
+        featureFlags =
+            FakeFeatureFlags().apply {
+                set(Flags.REFACTOR_UDFPS_KEYGUARD_VIEWS, true)
+                set(Flags.FACE_AUTH_REFACTOR, false)
+            }
+
+        val udfpsKeyguardInteractor =
+            UdfpsKeyguardInteractor(
+                configRepository,
+                BurnInInteractor(
+                    context,
+                    burnInHelper,
+                    testScope.backgroundScope,
+                    configRepository,
+                    FakeSystemClock(),
+                ),
+                KeyguardInteractor(
+                    keyguardRepository,
+                    fakeCommandQueue,
+                    featureFlags,
+                    bouncerRepository,
+                    configRepository,
+                ),
+            )
+
+        underTest =
+            UdfpsAodViewModel(
+                udfpsKeyguardInteractor,
+                context,
+            )
+    }
+
+    @Test
+    fun alphaAndVisibleUpdates_onDozeAmountChanges() =
+        testScope.runTest {
+            val alpha by collectLastValue(underTest.alpha)
+            val visible by collectLastValue(underTest.isVisible)
+
+            keyguardRepository.setDozeAmount(0f)
+            runCurrent()
+            assertThat(alpha).isEqualTo(0f)
+            assertThat(visible).isFalse()
+
+            keyguardRepository.setDozeAmount(.65f)
+            runCurrent()
+            assertThat(alpha).isEqualTo(.65f)
+            assertThat(visible).isTrue()
+
+            keyguardRepository.setDozeAmount(.23f)
+            runCurrent()
+            assertThat(alpha).isEqualTo(.23f)
+            assertThat(visible).isTrue()
+
+            keyguardRepository.setDozeAmount(1f)
+            runCurrent()
+            assertThat(alpha).isEqualTo(1f)
+            assertThat(visible).isTrue()
+        }
+
+    @Test
+    fun paddingUpdates_onScaleForResolutionChanges() =
+        testScope.runTest {
+            val padding by collectLastValue(underTest.padding)
+
+            configRepository.setScaleForResolution(1f)
+            runCurrent()
+            assertThat(padding).isEqualTo(defaultPadding)
+
+            configRepository.setScaleForResolution(2f)
+            runCurrent()
+            assertThat(padding).isEqualTo(defaultPadding * 2)
+
+            configRepository.setScaleForResolution(.5f)
+            runCurrent()
+            assertThat(padding).isEqualTo((defaultPadding * .5f).toInt())
+        }
+}

packages/SystemUI/tests/src/com/android/systemui/keyguard/ui/viewmodel/UdfpsFingerprintViewModelTest.kt

@@ -0,0 +1,131 @@
+/*
+ * 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.viewmodel
+
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.filters.SmallTest
+import com.android.systemui.SysuiTestCase
+import com.android.systemui.bouncer.data.repository.FakeKeyguardBouncerRepository
+import com.android.systemui.bouncer.data.repository.KeyguardBouncerRepository
+import com.android.systemui.common.ui.data.repository.FakeConfigurationRepository
+import com.android.systemui.coroutines.collectLastValue
+import com.android.systemui.doze.util.BurnInHelperWrapper
+import com.android.systemui.flags.FakeFeatureFlags
+import com.android.systemui.flags.Flags
+import com.android.systemui.keyguard.data.repository.FakeCommandQueue
+import com.android.systemui.keyguard.data.repository.FakeKeyguardRepository
+import com.android.systemui.keyguard.data.repository.FakeKeyguardTransitionRepository
+import com.android.systemui.keyguard.domain.interactor.BurnInInteractor
+import com.android.systemui.keyguard.domain.interactor.KeyguardInteractor
+import com.android.systemui.keyguard.domain.interactor.KeyguardTransitionInteractor
+import com.android.systemui.keyguard.domain.interactor.UdfpsKeyguardInteractor
+import com.android.systemui.util.time.FakeSystemClock
+import com.google.common.truth.Truth.assertThat
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.test.TestScope
+import kotlinx.coroutines.test.runCurrent
+import kotlinx.coroutines.test.runTest
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mockito.Mock
+import org.mockito.MockitoAnnotations
+
+/** Tests UdfpsFingerprintViewModel specific flows. */
+@ExperimentalCoroutinesApi
+@SmallTest
+@RunWith(AndroidJUnit4::class)
+class UdfpsFingerprintViewModelTest : SysuiTestCase() {
+    private val defaultPadding = 12
+    private lateinit var underTest: FingerprintViewModel
+
+    private lateinit var testScope: TestScope
+    private lateinit var configRepository: FakeConfigurationRepository
+    private lateinit var bouncerRepository: KeyguardBouncerRepository
+    private lateinit var keyguardRepository: FakeKeyguardRepository
+    private lateinit var fakeCommandQueue: FakeCommandQueue
+    private lateinit var featureFlags: FakeFeatureFlags
+    private lateinit var transitionRepository: FakeKeyguardTransitionRepository
+
+    @Mock private lateinit var burnInHelper: BurnInHelperWrapper
+
+    @Before
+    fun setUp() {
+        MockitoAnnotations.initMocks(this)
+        overrideResource(com.android.systemui.R.dimen.lock_icon_padding, defaultPadding)
+        testScope = TestScope()
+        configRepository = FakeConfigurationRepository()
+        keyguardRepository = FakeKeyguardRepository()
+        bouncerRepository = FakeKeyguardBouncerRepository()
+        fakeCommandQueue = FakeCommandQueue()
+        featureFlags =
+            FakeFeatureFlags().apply {
+                set(Flags.REFACTOR_UDFPS_KEYGUARD_VIEWS, true)
+                set(Flags.FACE_AUTH_REFACTOR, false)
+            }
+        bouncerRepository = FakeKeyguardBouncerRepository()
+        transitionRepository = FakeKeyguardTransitionRepository()
+        val transitionInteractor =
+            KeyguardTransitionInteractor(
+                transitionRepository,
+                testScope.backgroundScope,
+            )
+        val udfpsKeyguardInteractor =
+            UdfpsKeyguardInteractor(
+                configRepository,
+                BurnInInteractor(
+                    context,
+                    burnInHelper,
+                    testScope.backgroundScope,
+                    configRepository,
+                    FakeSystemClock(),
+                ),
+                KeyguardInteractor(
+                    keyguardRepository,
+                    fakeCommandQueue,
+                    featureFlags,
+                    bouncerRepository,
+                    configRepository,
+                ),
+            )
+
+        underTest =
+            FingerprintViewModel(
+                context,
+                transitionInteractor,
+                udfpsKeyguardInteractor,
+            )
+    }
+
+    @Test
+    fun paddingUpdates_onScaleForResolutionChanges() =
+        testScope.runTest {
+            val padding by collectLastValue(underTest.padding)
+
+            configRepository.setScaleForResolution(1f)
+            runCurrent()
+            assertThat(padding).isEqualTo(defaultPadding)
+
+            configRepository.setScaleForResolution(2f)
+            runCurrent()
+            assertThat(padding).isEqualTo(defaultPadding * 2)
+
+            configRepository.setScaleForResolution(.5f)
+            runCurrent()
+            assertThat(padding).isEqualTo((defaultPadding * .5).toInt())
+        }
+}

packages/SystemUI/tests/src/com/android/systemui/keyguard/ui/viewmodel/UdfpsLockscreenViewModelTest.kt

@@ -0,0 +1,505 @@
+/*
+ * 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.viewmodel
+
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.filters.SmallTest
+import com.android.settingslib.Utils
+import com.android.systemui.SysuiTestCase
+import com.android.systemui.coroutines.collectLastValue
+import com.android.systemui.keyguard.data.repository.FakeKeyguardTransitionRepository
+import com.android.systemui.keyguard.domain.interactor.KeyguardTransitionInteractor
+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.collect.Range
+import com.google.common.truth.Truth.assertThat
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.test.TestScope
+import kotlinx.coroutines.test.runCurrent
+import kotlinx.coroutines.test.runTest
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mockito.MockitoAnnotations
+
+/** Tests UDFPS lockscreen view model transitions. */
+@ExperimentalCoroutinesApi
+@SmallTest
+@RunWith(AndroidJUnit4::class)
+class UdfpsLockscreenViewModelTest : SysuiTestCase() {
+    private val lockscreenColorResId = android.R.attr.textColorPrimary
+    private val alternateBouncerResId = com.android.internal.R.attr.materialColorOnPrimaryFixed
+    private val lockscreenColor = Utils.getColorAttrDefaultColor(context, lockscreenColorResId)
+    private val alternateBouncerColor =
+        Utils.getColorAttrDefaultColor(context, alternateBouncerResId)
+
+    private lateinit var underTest: UdfpsLockscreenViewModel
+    private lateinit var testScope: TestScope
+    private lateinit var transitionRepository: FakeKeyguardTransitionRepository
+
+    @Before
+    fun setUp() {
+        MockitoAnnotations.initMocks(this)
+        testScope = TestScope()
+        transitionRepository = FakeKeyguardTransitionRepository()
+        val transitionInteractor =
+            KeyguardTransitionInteractor(
+                transitionRepository,
+                testScope.backgroundScope,
+            )
+        underTest =
+            UdfpsLockscreenViewModel(
+                context,
+                lockscreenColorResId,
+                alternateBouncerResId,
+                transitionInteractor,
+            )
+    }
+
+    @Test
+    fun goneToAodTransition() =
+        testScope.runTest {
+            val transition by collectLastValue(underTest.transition)
+            val visible by collectLastValue(underTest.visible)
+
+            // TransitionState.STARTED: gone -> AOD
+            transitionRepository.sendTransitionStep(
+                TransitionStep(
+                    from = KeyguardState.GONE,
+                    to = KeyguardState.AOD,
+                    value = 0f,
+                    transitionState = TransitionState.STARTED,
+                    ownerName = "goneToAodTransition",
+                )
+            )
+            runCurrent()
+            assertThat(transition?.alpha).isEqualTo(0f)
+            assertThat(visible).isFalse()
+
+            // TransitionState.RUNNING: gone -> AOD
+            transitionRepository.sendTransitionStep(
+                TransitionStep(
+                    from = KeyguardState.GONE,
+                    to = KeyguardState.AOD,
+                    value = .6f,
+                    transitionState = TransitionState.RUNNING,
+                    ownerName = "goneToAodTransition",
+                )
+            )
+            runCurrent()
+            assertThat(transition?.alpha).isEqualTo(0f)
+            assertThat(visible).isFalse()
+
+            // TransitionState.FINISHED: gone -> AOD
+            transitionRepository.sendTransitionStep(
+                TransitionStep(
+                    from = KeyguardState.GONE,
+                    to = KeyguardState.AOD,
+                    value = 1f,
+                    transitionState = TransitionState.FINISHED,
+                    ownerName = "goneToAodTransition",
+                )
+            )
+            runCurrent()
+            assertThat(transition?.alpha).isEqualTo(0f)
+            assertThat(visible).isFalse()
+        }
+
+    @Test
+    fun lockscreenToAod() =
+        testScope.runTest {
+            val transition by collectLastValue(underTest.transition)
+            val visible by collectLastValue(underTest.visible)
+
+            // TransitionState.STARTED: lockscreen -> AOD
+            transitionRepository.sendTransitionStep(
+                TransitionStep(
+                    from = KeyguardState.LOCKSCREEN,
+                    to = KeyguardState.AOD,
+                    value = 0f,
+                    transitionState = TransitionState.STARTED,
+                    ownerName = "lockscreenToAod",
+                )
+            )
+            runCurrent()
+            assertThat(transition?.alpha).isEqualTo(1f)
+            assertThat(transition?.scale).isEqualTo(1f)
+            assertThat(transition?.color).isEqualTo(lockscreenColor)
+            assertThat(visible).isTrue()
+
+            // TransitionState.RUNNING: lockscreen -> AOD
+            transitionRepository.sendTransitionStep(
+                TransitionStep(
+                    from = KeyguardState.LOCKSCREEN,
+                    to = KeyguardState.AOD,
+                    value = .6f,
+                    transitionState = TransitionState.RUNNING,
+                    ownerName = "lockscreenToAod",
+                )
+            )
+            runCurrent()
+            assertThat(transition?.alpha).isIn(Range.closed(.39f, .41f))
+            assertThat(transition?.scale).isEqualTo(1f)
+            assertThat(transition?.color).isEqualTo(lockscreenColor)
+            assertThat(visible).isTrue()
+
+            // TransitionState.FINISHED: lockscreen -> AOD
+            transitionRepository.sendTransitionStep(
+                TransitionStep(
+                    from = KeyguardState.LOCKSCREEN,
+                    to = KeyguardState.AOD,
+                    value = 1f,
+                    transitionState = TransitionState.FINISHED,
+                    ownerName = "lockscreenToAod",
+                )
+            )
+            runCurrent()
+            assertThat(transition?.alpha).isEqualTo(0f)
+            assertThat(transition?.scale).isEqualTo(1f)
+            assertThat(transition?.color).isEqualTo(lockscreenColor)
+            assertThat(visible).isFalse()
+        }
+
+    @Test
+    fun aodToLockscreen() =
+        testScope.runTest {
+            val transition by collectLastValue(underTest.transition)
+            val visible by collectLastValue(underTest.visible)
+
+            // TransitionState.STARTED: AOD -> lockscreen
+            transitionRepository.sendTransitionStep(
+                TransitionStep(
+                    from = KeyguardState.AOD,
+                    to = KeyguardState.LOCKSCREEN,
+                    value = 0f,
+                    transitionState = TransitionState.STARTED,
+                    ownerName = "aodToLockscreen",
+                )
+            )
+            runCurrent()
+            assertThat(transition?.alpha).isEqualTo(0f)
+            assertThat(transition?.scale).isEqualTo(1f)
+            assertThat(transition?.color).isEqualTo(lockscreenColor)
+            assertThat(visible).isFalse()
+
+            // TransitionState.RUNNING: AOD -> lockscreen
+            transitionRepository.sendTransitionStep(
+                TransitionStep(
+                    from = KeyguardState.AOD,
+                    to = KeyguardState.LOCKSCREEN,
+                    value = .6f,
+                    transitionState = TransitionState.RUNNING,
+                    ownerName = "aodToLockscreen",
+                )
+            )
+            runCurrent()
+            assertThat(transition?.alpha).isIn(Range.closed(.59f, .61f))
+            assertThat(transition?.scale).isEqualTo(1f)
+            assertThat(transition?.color).isEqualTo(lockscreenColor)
+            assertThat(visible).isTrue()
+
+            // TransitionState.FINISHED: AOD -> lockscreen
+            transitionRepository.sendTransitionStep(
+                TransitionStep(
+                    from = KeyguardState.AOD,
+                    to = KeyguardState.LOCKSCREEN,
+                    value = 1f,
+                    transitionState = TransitionState.FINISHED,
+                    ownerName = "aodToLockscreen",
+                )
+            )
+            runCurrent()
+            assertThat(transition?.alpha).isEqualTo(1f)
+            assertThat(transition?.scale).isEqualTo(1f)
+            assertThat(transition?.color).isEqualTo(lockscreenColor)
+            assertThat(visible).isTrue()
+        }
+
+    @Test
+    fun lockscreenToAlternateBouncer() =
+        testScope.runTest {
+            val transition by collectLastValue(underTest.transition)
+            val visible by collectLastValue(underTest.visible)
+
+            // TransitionState.STARTED: lockscreen -> alternate bouncer
+            transitionRepository.sendTransitionStep(
+                TransitionStep(
+                    from = KeyguardState.LOCKSCREEN,
+                    to = KeyguardState.ALTERNATE_BOUNCER,
+                    value = 0f,
+                    transitionState = TransitionState.STARTED,
+                    ownerName = "lockscreenToAlternateBouncer",
+                )
+            )
+            runCurrent()
+            assertThat(transition?.alpha).isEqualTo(1f)
+            assertThat(transition?.scale).isEqualTo(1f)
+            assertThat(transition?.color).isEqualTo(alternateBouncerColor)
+            assertThat(visible).isTrue()
+
+            // TransitionState.RUNNING: lockscreen -> alternate bouncer
+            transitionRepository.sendTransitionStep(
+                TransitionStep(
+                    from = KeyguardState.LOCKSCREEN,
+                    to = KeyguardState.ALTERNATE_BOUNCER,
+                    value = .6f,
+                    transitionState = TransitionState.RUNNING,
+                    ownerName = "lockscreenToAlternateBouncer",
+                )
+            )
+            runCurrent()
+            assertThat(transition?.alpha).isEqualTo(1f)
+            assertThat(transition?.scale).isEqualTo(1f)
+            assertThat(transition?.color).isEqualTo(alternateBouncerColor)
+            assertThat(visible).isTrue()
+
+            // TransitionState.FINISHED: lockscreen -> alternate bouncer
+            transitionRepository.sendTransitionStep(
+                TransitionStep(
+                    from = KeyguardState.LOCKSCREEN,
+                    to = KeyguardState.ALTERNATE_BOUNCER,
+                    value = 1f,
+                    transitionState = TransitionState.FINISHED,
+                    ownerName = "lockscreenToAlternateBouncer",
+                )
+            )
+            runCurrent()
+            assertThat(transition?.alpha).isEqualTo(1f)
+            assertThat(transition?.scale).isEqualTo(1f)
+            assertThat(transition?.color).isEqualTo(alternateBouncerColor)
+            assertThat(visible).isTrue()
+        }
+
+    fun alternateBouncerToPrimaryBouncer() =
+        testScope.runTest {
+            val transition by collectLastValue(underTest.transition)
+            val visible by collectLastValue(underTest.visible)
+
+            // TransitionState.STARTED: alternate bouncer -> primary bouncer
+            transitionRepository.sendTransitionStep(
+                TransitionStep(
+                    from = KeyguardState.ALTERNATE_BOUNCER,
+                    to = KeyguardState.PRIMARY_BOUNCER,
+                    value = 0f,
+                    transitionState = TransitionState.STARTED,
+                    ownerName = "alternateBouncerToPrimaryBouncer",
+                )
+            )
+            runCurrent()
+            assertThat(transition?.alpha).isEqualTo(1f)
+            assertThat(transition?.scale).isEqualTo(1f)
+            assertThat(transition?.color).isEqualTo(alternateBouncerColor)
+            assertThat(visible).isTrue()
+
+            // TransitionState.RUNNING: alternate bouncer -> primary bouncer
+            transitionRepository.sendTransitionStep(
+                TransitionStep(
+                    from = KeyguardState.ALTERNATE_BOUNCER,
+                    to = KeyguardState.PRIMARY_BOUNCER,
+                    value = .6f,
+                    transitionState = TransitionState.RUNNING,
+                    ownerName = "alternateBouncerToPrimaryBouncer",
+                )
+            )
+            runCurrent()
+            assertThat(transition?.alpha).isIn(Range.closed(.59f, .61f))
+            assertThat(transition?.scale).isEqualTo(1f)
+            assertThat(transition?.color).isEqualTo(alternateBouncerColor)
+            assertThat(visible).isTrue()
+
+            // TransitionState.FINISHED: alternate bouncer -> primary bouncer
+            transitionRepository.sendTransitionStep(
+                TransitionStep(
+                    from = KeyguardState.ALTERNATE_BOUNCER,
+                    to = KeyguardState.PRIMARY_BOUNCER,
+                    value = 1f,
+                    transitionState = TransitionState.FINISHED,
+                    ownerName = "alternateBouncerToPrimaryBouncer",
+                )
+            )
+            runCurrent()
+            assertThat(transition?.alpha).isEqualTo(0f)
+            assertThat(transition?.scale).isEqualTo(1f)
+            assertThat(transition?.color).isEqualTo(alternateBouncerColor)
+            assertThat(visible).isFalse()
+        }
+
+    fun alternateBouncerToAod() =
+        testScope.runTest {
+            val transition by collectLastValue(underTest.transition)
+            val visible by collectLastValue(underTest.visible)
+
+            // TransitionState.STARTED: alternate bouncer -> aod
+            transitionRepository.sendTransitionStep(
+                TransitionStep(
+                    from = KeyguardState.ALTERNATE_BOUNCER,
+                    to = KeyguardState.AOD,
+                    value = 0f,
+                    transitionState = TransitionState.STARTED,
+                    ownerName = "alternateBouncerToAod",
+                )
+            )
+            runCurrent()
+            assertThat(transition?.alpha).isEqualTo(1f)
+            assertThat(transition?.scale).isEqualTo(1f)
+            assertThat(transition?.color).isEqualTo(alternateBouncerColor)
+            assertThat(visible).isTrue()
+
+            // TransitionState.RUNNING: alternate bouncer -> aod
+            transitionRepository.sendTransitionStep(
+                TransitionStep(
+                    from = KeyguardState.ALTERNATE_BOUNCER,
+                    to = KeyguardState.AOD,
+                    value = .6f,
+                    transitionState = TransitionState.RUNNING,
+                    ownerName = "alternateBouncerToAod",
+                )
+            )
+            runCurrent()
+            assertThat(transition?.alpha).isIn(Range.closed(.39f, .41f))
+            assertThat(transition?.scale).isEqualTo(1f)
+            assertThat(transition?.color).isEqualTo(alternateBouncerColor)
+            assertThat(visible).isTrue()
+
+            // TransitionState.FINISHED: alternate bouncer -> aod
+            transitionRepository.sendTransitionStep(
+                TransitionStep(
+                    from = KeyguardState.ALTERNATE_BOUNCER,
+                    to = KeyguardState.AOD,
+                    value = 1f,
+                    transitionState = TransitionState.FINISHED,
+                    ownerName = "alternateBouncerToAod",
+                )
+            )
+            runCurrent()
+            assertThat(transition?.alpha).isEqualTo(0f)
+            assertThat(transition?.scale).isEqualTo(1f)
+            assertThat(transition?.color).isEqualTo(alternateBouncerColor)
+            assertThat(visible).isFalse()
+        }
+
+    @Test
+    fun lockscreenToOccluded() =
+        testScope.runTest {
+            val transition by collectLastValue(underTest.transition)
+            val visible by collectLastValue(underTest.visible)
+
+            // TransitionState.STARTED: lockscreen -> occluded
+            transitionRepository.sendTransitionStep(
+                TransitionStep(
+                    from = KeyguardState.LOCKSCREEN,
+                    to = KeyguardState.OCCLUDED,
+                    value = 0f,
+                    transitionState = TransitionState.STARTED,
+                    ownerName = "lockscreenToOccluded",
+                )
+            )
+            runCurrent()
+            assertThat(transition?.alpha).isEqualTo(1f)
+            assertThat(transition?.scale).isEqualTo(1f)
+            assertThat(transition?.color).isEqualTo(lockscreenColor)
+            assertThat(visible).isTrue()
+
+            // TransitionState.RUNNING: lockscreen -> occluded
+            transitionRepository.sendTransitionStep(
+                TransitionStep(
+                    from = KeyguardState.LOCKSCREEN,
+                    to = KeyguardState.OCCLUDED,
+                    value = .6f,
+                    transitionState = TransitionState.RUNNING,
+                    ownerName = "lockscreenToOccluded",
+                )
+            )
+            runCurrent()
+            assertThat(transition?.alpha).isIn(Range.closed(.39f, .41f))
+            assertThat(transition?.scale).isEqualTo(1f)
+            assertThat(transition?.color).isEqualTo(lockscreenColor)
+            assertThat(visible).isTrue()
+
+            // TransitionState.FINISHED: lockscreen -> occluded
+            transitionRepository.sendTransitionStep(
+                TransitionStep(
+                    from = KeyguardState.LOCKSCREEN,
+                    to = KeyguardState.OCCLUDED,
+                    value = 1f,
+                    transitionState = TransitionState.FINISHED,
+                    ownerName = "lockscreenToOccluded",
+                )
+            )
+            runCurrent()
+            assertThat(transition?.alpha).isEqualTo(0f)
+            assertThat(transition?.scale).isEqualTo(1f)
+            assertThat(transition?.color).isEqualTo(lockscreenColor)
+            assertThat(visible).isFalse()
+        }
+
+    @Test
+    fun occludedToLockscreen() =
+        testScope.runTest {
+            val transition by collectLastValue(underTest.transition)
+            val visible by collectLastValue(underTest.visible)
+
+            // TransitionState.STARTED: occluded -> lockscreen
+            transitionRepository.sendTransitionStep(
+                TransitionStep(
+                    from = KeyguardState.OCCLUDED,
+                    to = KeyguardState.LOCKSCREEN,
+                    value = 0f,
+                    transitionState = TransitionState.STARTED,
+                    ownerName = "occludedToLockscreen",
+                )
+            )
+            runCurrent()
+            assertThat(transition?.alpha).isEqualTo(1f)
+            assertThat(transition?.scale).isEqualTo(1f)
+            assertThat(transition?.color).isEqualTo(lockscreenColor)
+            assertThat(visible).isTrue()
+
+            // TransitionState.RUNNING: occluded -> lockscreen
+            transitionRepository.sendTransitionStep(
+                TransitionStep(
+                    from = KeyguardState.OCCLUDED,
+                    to = KeyguardState.LOCKSCREEN,
+                    value = .6f,
+                    transitionState = TransitionState.RUNNING,
+                    ownerName = "occludedToLockscreen",
+                )
+            )
+            runCurrent()
+            assertThat(transition?.alpha).isEqualTo(1f)
+            assertThat(transition?.scale).isEqualTo(1f)
+            assertThat(transition?.color).isEqualTo(lockscreenColor)
+            assertThat(visible).isTrue()
+
+            // TransitionState.FINISHED: occluded -> lockscreen
+            transitionRepository.sendTransitionStep(
+                TransitionStep(
+                    from = KeyguardState.OCCLUDED,
+                    to = KeyguardState.LOCKSCREEN,
+                    value = 1f,
+                    transitionState = TransitionState.FINISHED,
+                    ownerName = "occludedToLockscreen",
+                )
+            )
+            runCurrent()
+            assertThat(transition?.alpha).isEqualTo(1f)
+            assertThat(transition?.scale).isEqualTo(1f)
+            assertThat(transition?.color).isEqualTo(lockscreenColor)
+            assertThat(visible).isTrue()
+        }
+}