Merge "Handle timeout/state-change during fold animation" into main
diff --git a/packages/SystemUI/src/com/android/systemui/unfold/FoldLightRevealOverlayAnimation.kt b/packages/SystemUI/src/com/android/systemui/unfold/FoldLightRevealOverlayAnimation.kt
index 5c53ff9..d19a336 100644
--- a/packages/SystemUI/src/com/android/systemui/unfold/FoldLightRevealOverlayAnimation.kt
+++ b/packages/SystemUI/src/com/android/systemui/unfold/FoldLightRevealOverlayAnimation.kt
@@ -16,6 +16,8 @@
 
 package com.android.systemui.unfold
 
+import android.animation.Animator
+import android.animation.AnimatorListenerAdapter
 import android.animation.ValueAnimator
 import android.annotation.BinderThread
 import android.content.Context
@@ -23,7 +25,6 @@
 import android.os.SystemProperties
 import android.util.Log
 import android.view.animation.DecelerateInterpolator
-import androidx.core.animation.addListener
 import com.android.internal.foldables.FoldLockSettingAvailabilityProvider
 import com.android.systemui.dagger.qualifiers.Background
 import com.android.systemui.display.data.repository.DeviceStateRepository
@@ -36,17 +37,25 @@
 import com.android.systemui.unfold.dagger.UnfoldBg
 import com.android.systemui.util.animation.data.repository.AnimationStatusRepository
 import javax.inject.Inject
+import kotlin.coroutines.resume
 import kotlinx.coroutines.CompletableDeferred
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.TimeoutCancellationException
 import kotlinx.coroutines.android.asCoroutineDispatcher
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.catch
 import kotlinx.coroutines.flow.distinctUntilChanged
 import kotlinx.coroutines.flow.filter
 import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.flow.flatMapLatest
+import kotlinx.coroutines.flow.flow
 import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.flow.onCompletion
 import kotlinx.coroutines.launch
+import kotlinx.coroutines.suspendCancellableCoroutine
 import kotlinx.coroutines.withTimeout
 
+@OptIn(kotlinx.coroutines.ExperimentalCoroutinesApi::class)
 class FoldLightRevealOverlayAnimation
 @Inject
 constructor(
@@ -61,6 +70,9 @@
 
     private val revealProgressValueAnimator: ValueAnimator =
         ValueAnimator.ofFloat(ALPHA_OPAQUE, ALPHA_TRANSPARENT)
+    private val areAnimationEnabled: Flow<Boolean>
+        get() = animationStatusRepository.areAnimationsEnabled()
+
     private lateinit var controller: FullscreenLightRevealAnimationController
     @Volatile private var readyCallback: CompletableDeferred<Runnable>? = null
 
@@ -89,33 +101,30 @@
 
         applicationScope.launch(bgHandler.asCoroutineDispatcher()) {
             deviceStateRepository.state
-                .map { it != DeviceStateRepository.DeviceState.FOLDED }
+                .map { it == DeviceStateRepository.DeviceState.FOLDED }
                 .distinctUntilChanged()
-                .filter { isUnfolded -> isUnfolded }
-                .collect { controller.ensureOverlayRemoved() }
-        }
-
-        applicationScope.launch(bgHandler.asCoroutineDispatcher()) {
-            deviceStateRepository.state
-                .filter {
-                    animationStatusRepository.areAnimationsEnabled().first() &&
-                        it == DeviceStateRepository.DeviceState.FOLDED
-                }
-                .collect {
-                    try {
-                        withTimeout(WAIT_FOR_ANIMATION_TIMEOUT_MS) {
-                            readyCallback = CompletableDeferred()
-                            val onReady = readyCallback?.await()
-                            readyCallback = null
-                            controller.addOverlay(ALPHA_OPAQUE, onReady)
-                            waitForScreenTurnedOn()
+                .flatMapLatest { isFolded ->
+                    flow<Nothing> {
+                            if (!areAnimationEnabled.first() || !isFolded) {
+                                return@flow
+                            }
+                            withTimeout(WAIT_FOR_ANIMATION_TIMEOUT_MS) {
+                                readyCallback = CompletableDeferred()
+                                val onReady = readyCallback?.await()
+                                readyCallback = null
+                                controller.addOverlay(ALPHA_OPAQUE, onReady)
+                                waitForScreenTurnedOn()
+                            }
                             playFoldLightRevealOverlayAnimation()
                         }
-                    } catch (e: TimeoutCancellationException) {
-                        Log.e(TAG, "Fold light reveal animation timed out")
-                        ensureOverlayRemovedInternal()
-                    }
+                        .catchTimeoutAndLog()
+                        .onCompletion {
+                            val onReady = readyCallback?.takeIf { it.isCompleted }?.getCompleted()
+                            onReady?.run()
+                            readyCallback = null
+                        }
                 }
+                .collect {}
         }
     }
 
@@ -128,19 +137,34 @@
         powerInteractor.screenPowerState.filter { it == ScreenPowerState.SCREEN_ON }.first()
     }
 
-    private fun ensureOverlayRemovedInternal() {
-        revealProgressValueAnimator.cancel()
-        controller.ensureOverlayRemoved()
-    }
-
-    private fun playFoldLightRevealOverlayAnimation() {
+    private suspend fun playFoldLightRevealOverlayAnimation() {
         revealProgressValueAnimator.duration = ANIMATION_DURATION
         revealProgressValueAnimator.interpolator = DecelerateInterpolator()
         revealProgressValueAnimator.addUpdateListener { animation ->
             controller.updateRevealAmount(animation.animatedFraction)
         }
-        revealProgressValueAnimator.addListener(onEnd = { controller.ensureOverlayRemoved() })
-        revealProgressValueAnimator.start()
+        revealProgressValueAnimator.startAndAwaitCompletion()
+    }
+
+    private suspend fun ValueAnimator.startAndAwaitCompletion(): Unit =
+        suspendCancellableCoroutine { continuation ->
+            val listener =
+                object : AnimatorListenerAdapter() {
+                    override fun onAnimationEnd(animation: Animator) {
+                        continuation.resume(Unit)
+                        removeListener(this)
+                    }
+                }
+            addListener(listener)
+            continuation.invokeOnCancellation { removeListener(listener) }
+            start()
+        }
+
+    private fun <T> Flow<T>.catchTimeoutAndLog() = catch { exception ->
+        when (exception) {
+            is TimeoutCancellationException -> Log.e(TAG, "Fold light reveal animation timed out")
+            else -> throw exception
+        }
     }
 
     private companion object {