Fix BP face auth requiring full tap after auth

Fixes face auth in BP requiring user to lift and tap again if face auth
completes before finger.

NOTE: This version requires finger to be held down during face auth as confirmation.

Bug: 291960666
Test: atest PromptViewModelTest
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:6ef648c91a0cb87719392dcdc6870aff8ecd424d)
Merged-In: I0a82720561a10cf79716784a34e165b86055d5bf
Change-Id: I0a82720561a10cf79716784a34e165b86055d5bf

4 files changed, 67 insertions, 24 deletions

diff --git a/packages/SystemUI/src/com/android/systemui/biometrics/UdfpsController.java b/packages/SystemUI/src/com/android/systemui/biometrics/UdfpsController.java
index 16d12bbfe3b4..0ccda1f5fd7c 100644
--- a/packages/SystemUI/src/com/android/systemui/biometrics/UdfpsController.java
+++ b/packages/SystemUI/src/com/android/systemui/biometrics/UdfpsController.java
@@ -644,8 +644,9 @@ public class UdfpsController implements DozeReceiver, Dumpable {
             shouldPilfer = true;
         }
 
-        // Pilfer only once per gesture
-        if (shouldPilfer && !mPointerPilfered) {
+        // Pilfer only once per gesture, don't pilfer for BP
+        if (shouldPilfer && !mPointerPilfered
+                && getBiometricSessionType() != SESSION_BIOMETRIC_PROMPT) {
             mInputManager.pilferPointers(
                     mOverlay.getOverlayView().getViewRootImpl().getInputToken());
             mPointerPilfered = true;
diff --git a/packages/SystemUI/src/com/android/systemui/biometrics/ui/binder/BiometricViewBinder.kt b/packages/SystemUI/src/com/android/systemui/biometrics/ui/binder/BiometricViewBinder.kt
index f7625cd9b859..d4643f4eaaff 100644
--- a/packages/SystemUI/src/com/android/systemui/biometrics/ui/binder/BiometricViewBinder.kt
+++ b/packages/SystemUI/src/com/android/systemui/biometrics/ui/binder/BiometricViewBinder.kt
@@ -17,6 +17,7 @@
 package com.android.systemui.biometrics.ui.binder
 
 import android.animation.Animator
+import android.annotation.SuppressLint
 import android.content.Context
 import android.hardware.biometrics.BiometricAuthenticator
 import android.hardware.biometrics.BiometricConstants
@@ -25,6 +26,7 @@ import android.hardware.face.FaceManager
 import android.os.Bundle
 import android.text.method.ScrollingMovementMethod
 import android.util.Log
+import android.view.MotionEvent
 import android.view.View
 import android.view.View.IMPORTANT_FOR_ACCESSIBILITY_NO
 import android.view.accessibility.AccessibilityManager
@@ -68,6 +70,7 @@ private const val TAG = "BiometricViewBinder"
 object BiometricViewBinder {
 
     /** Binds a [BiometricPromptLayout] to a [PromptViewModel]. */
+    @SuppressLint("ClickableViewAccessibility")
     @JvmStatic
     fun bind(
         view: BiometricPromptLayout,
@@ -293,21 +296,19 @@ object BiometricViewBinder {
 
                 // reuse the icon as a confirm button
                 launch {
-                    viewModel.isConfirmButtonVisible
+                    viewModel.isIconConfirmButton
                         .map { isPending ->
                             when {
                                 isPending && iconController.actsAsConfirmButton ->
-                                    View.OnClickListener { viewModel.confirmAuthenticated() }
+                                    View.OnTouchListener { _: View, event: MotionEvent ->
+                                        viewModel.onOverlayTouch(event)
+                                    }
                                 else -> null
                             }
                         }
-                        .collect { onClick ->
-                            iconViewOverlay.setOnClickListener(onClick)
-                            iconView.setOnClickListener(onClick)
-                            if (onClick == null) {
-                                iconViewOverlay.isClickable = false
-                                iconView.isClickable = false
-                            }
+                        .collect { onTouch ->
+                            iconViewOverlay.setOnTouchListener(onTouch)
+                            iconView.setOnTouchListener(onTouch)
                         }
                 }
 
@@ -333,6 +334,14 @@ object BiometricViewBinder {
                             backgroundView.setOnClickListener(null)
                             backgroundView.importantForAccessibility =
                                 IMPORTANT_FOR_ACCESSIBILITY_NO
+
+                            // Allow icon to be used as confirmation button with a11y enabled
+                            if (accessibilityManager.isTouchExplorationEnabled) {
+                                iconViewOverlay.setOnClickListener {
+                                    viewModel.confirmAuthenticated()
+                                }
+                                iconView.setOnClickListener { viewModel.confirmAuthenticated() }
+                            }
                         }
                         if (authState.isAuthenticatedAndConfirmed) {
                             view.announceForAccessibility(
diff --git a/packages/SystemUI/src/com/android/systemui/biometrics/ui/viewmodel/PromptViewModel.kt b/packages/SystemUI/src/com/android/systemui/biometrics/ui/viewmodel/PromptViewModel.kt
index 8a2e4059ee73..a148d087eb3b 100644
--- a/packages/SystemUI/src/com/android/systemui/biometrics/ui/viewmodel/PromptViewModel.kt
+++ b/packages/SystemUI/src/com/android/systemui/biometrics/ui/viewmodel/PromptViewModel.kt
@@ -17,6 +17,7 @@ package com.android.systemui.biometrics.ui.viewmodel
 
 import android.hardware.biometrics.BiometricPrompt
 import android.util.Log
+import android.view.MotionEvent
 import com.android.systemui.biometrics.AuthBiometricView
 import com.android.systemui.biometrics.domain.interactor.PromptSelectorInteractor
 import com.android.systemui.biometrics.domain.model.BiometricModalities
@@ -63,11 +64,18 @@ constructor(
     /** If the user has successfully authenticated and confirmed (when explicitly required). */
     val isAuthenticated: Flow<PromptAuthState> = _isAuthenticated.asStateFlow()
 
+    private val _isOverlayTouched: MutableStateFlow<Boolean> = MutableStateFlow(false)
+
     /**
      * If the API caller or the user's personal preferences require explicit confirmation after
      * successful authentication.
      */
-    val isConfirmationRequired: Flow<Boolean> = interactor.isConfirmationRequired
+    val isConfirmationRequired: Flow<Boolean> =
+        combine(_isOverlayTouched, interactor.isConfirmationRequired) {
+            isOverlayTouched,
+            isConfirmationRequired ->
+            !isOverlayTouched && isConfirmationRequired
+        }
 
     /** The kind of credential the user has. */
     val credentialKind: Flow<PromptKind> = interactor.credentialKind
@@ -141,6 +149,12 @@ constructor(
             }
             .distinctUntilChanged()
 
+    /** If the icon can be used as a confirmation button. */
+    val isIconConfirmButton: Flow<Boolean> =
+        combine(size, interactor.isConfirmationRequired) { size, isConfirmationRequired ->
+            size.isNotSmall && isConfirmationRequired
+        }
+
     /** If the negative button should be shown. */
     val isNegativeButtonVisible: Flow<Boolean> =
         combine(
@@ -286,8 +300,10 @@ constructor(
             if (message.isNotBlank()) PromptMessage.Help(message) else PromptMessage.Empty
         _forceMediumSize.value = true
         _legacyState.value =
-            if (alreadyAuthenticated) {
+            if (alreadyAuthenticated && isConfirmationRequired.first()) {
                 AuthBiometricView.STATE_PENDING_CONFIRMATION
+            } else if (alreadyAuthenticated && !isConfirmationRequired.first()) {
+                AuthBiometricView.STATE_AUTHENTICATED
             } else {
                 AuthBiometricView.STATE_HELP
             }
@@ -385,18 +401,10 @@ constructor(
     }
 
     private suspend fun needsExplicitConfirmation(modality: BiometricModality): Boolean {
-        val availableModalities = modalities.first()
         val confirmationRequired = isConfirmationRequired.first()
 
-        if (availableModalities.hasFaceAndFingerprint) {
-            // coex only needs confirmation when face is successful, unless it happens on the
-            // first attempt (i.e. without failure) before fingerprint scanning starts
-            val fingerprintStarted = fingerprintStartMode.first() != FingerprintStartMode.Pending
-            if (modality == BiometricModality.Face) {
-                return fingerprintStarted || confirmationRequired
-            }
-        }
-        if (availableModalities.hasFaceOnly) {
+        // Only worry about confirmationRequired if face was used to unlock
+        if (modality == BiometricModality.Face) {
             return confirmationRequired
         }
         // fingerprint only never requires confirmation
@@ -427,6 +435,26 @@ constructor(
     }
 
     /**
+     * Touch event occurred on the overlay
+     *
+     * Tracks whether a finger is currently down to set [_isOverlayTouched] to be used as user
+     * confirmation
+     */
+    fun onOverlayTouch(event: MotionEvent): Boolean {
+        if (event.actionMasked == MotionEvent.ACTION_DOWN) {
+            _isOverlayTouched.value = true
+
+            if (_isAuthenticated.value.needsUserConfirmation) {
+                confirmAuthenticated()
+            }
+            return true
+        } else if (event.actionMasked == MotionEvent.ACTION_UP) {
+            _isOverlayTouched.value = false
+        }
+        return false
+    }
+
+    /**
      * Switch to the credential view.
      *
      * TODO(b/251476085): this should be decoupled from the shared panel controller
diff --git a/packages/SystemUI/tests/src/com/android/systemui/biometrics/ui/viewmodel/PromptViewModelTest.kt b/packages/SystemUI/tests/src/com/android/systemui/biometrics/ui/viewmodel/PromptViewModelTest.kt
index 91140a9b0fc4..eed7b666fc71 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/biometrics/ui/viewmodel/PromptViewModelTest.kt
+++ b/packages/SystemUI/tests/src/com/android/systemui/biometrics/ui/viewmodel/PromptViewModelTest.kt
@@ -499,6 +499,7 @@ internal class PromptViewModelTest(private val testCase: TestCase) : SysuiTestCa
         val messageVisible by collectLastValue(viewModel.isIndicatorMessageVisible)
         val size by collectLastValue(viewModel.size)
         val legacyState by collectLastValue(viewModel.legacyState)
+        val confirmationRequired by collectLastValue(viewModel.isConfirmationRequired)
 
         if (testCase.isCoex && testCase.authenticatedByFingerprint) {
             viewModel.ensureFingerprintHasStarted(isDelayed = true)
@@ -507,7 +508,11 @@ internal class PromptViewModelTest(private val testCase: TestCase) : SysuiTestCa
         viewModel.showHelp(helpMessage)
 
         assertThat(size).isEqualTo(PromptSize.MEDIUM)
-        assertThat(legacyState).isEqualTo(AuthBiometricView.STATE_PENDING_CONFIRMATION)
+        if (confirmationRequired == true) {
+            assertThat(legacyState).isEqualTo(AuthBiometricView.STATE_PENDING_CONFIRMATION)
+        } else {
+            assertThat(legacyState).isEqualTo(AuthBiometricView.STATE_AUTHENTICATED)
+        }
         assertThat(message).isEqualTo(PromptMessage.Help(helpMessage))
         assertThat(messageVisible).isTrue()
         assertThat(authenticating).isFalse()