Remove need for isComplete, but still always send final animation value

Due to not using a SharedFlow anymore, there is a possibility for
collectors of this flow to not receive the final value due to the
outer-scoped isComplete value. The possibility of this increases
if there are multiple consumers of the same animation.

Removing isComplete removes this possibility. The final value will
now eventually show up to all consumers, but it is not guaranteed
to be arrive to all of them at the same time.

DistinctUntilChanged prevents the final value from being repeatedly
emitted to the consumers.

Bug: 318543679
Flag: NONE
Test: atest KeyguardTransitionAnimationFlowTest.kt
Test: manual - observe final values coming in to both shortcuts with keyguard_bottom_area_refactor flag turned on
Change-Id: I781f90cb80fcf58bec69c258a206ab717bdd2022
diff --git a/packages/SystemUI/multivalentTests/src/com/android/systemui/keyguard/ui/viewmodel/AlternateBouncerToAodTransitionViewModelTest.kt b/packages/SystemUI/multivalentTests/src/com/android/systemui/keyguard/ui/viewmodel/AlternateBouncerToAodTransitionViewModelTest.kt
index 9daf186..e7037a6 100644
--- a/packages/SystemUI/multivalentTests/src/com/android/systemui/keyguard/ui/viewmodel/AlternateBouncerToAodTransitionViewModelTest.kt
+++ b/packages/SystemUI/multivalentTests/src/com/android/systemui/keyguard/ui/viewmodel/AlternateBouncerToAodTransitionViewModelTest.kt
@@ -94,7 +94,7 @@
                 testScope,
             )
 
-            assertThat(values.size).isEqualTo(6)
+            assertThat(values.size).isEqualTo(5)
             values.forEach { assertThat(it).isIn(Range.closed(0f, 1f)) }
         }
 
diff --git a/packages/SystemUI/multivalentTests/src/com/android/systemui/keyguard/ui/viewmodel/DreamingToLockscreenTransitionViewModelTest.kt b/packages/SystemUI/multivalentTests/src/com/android/systemui/keyguard/ui/viewmodel/DreamingToLockscreenTransitionViewModelTest.kt
index 53bca48..e141c2b 100644
--- a/packages/SystemUI/multivalentTests/src/com/android/systemui/keyguard/ui/viewmodel/DreamingToLockscreenTransitionViewModelTest.kt
+++ b/packages/SystemUI/multivalentTests/src/com/android/systemui/keyguard/ui/viewmodel/DreamingToLockscreenTransitionViewModelTest.kt
@@ -55,6 +55,28 @@
     private val underTest = kosmos.dreamingToLockscreenTransitionViewModel
 
     @Test
+    fun shortcutsAlpha_bothShortcutsReceiveLastValue() =
+        testScope.runTest {
+            val valuesLeft by collectValues(underTest.shortcutsAlpha)
+            val valuesRight by collectValues(underTest.shortcutsAlpha)
+
+            keyguardTransitionRepository.sendTransitionSteps(
+                listOf(
+                    step(0f, TransitionState.STARTED),
+                    step(0.3f),
+                    step(0.5f),
+                    step(0.6f),
+                    step(0.8f),
+                    step(1f),
+                ),
+                testScope,
+            )
+
+            assertThat(valuesLeft.last()).isEqualTo(1f)
+            assertThat(valuesRight.last()).isEqualTo(1f)
+        }
+
+    @Test
     fun dreamOverlayTranslationY() =
         testScope.runTest {
             val pixels = 100
@@ -73,7 +95,7 @@
                 testScope,
             )
 
-            assertThat(values.size).isEqualTo(7)
+            assertThat(values.size).isEqualTo(6)
             values.forEach { assertThat(it).isIn(Range.closed(0f, 100f)) }
         }
 
@@ -95,7 +117,7 @@
                 testScope,
             )
 
-            assertThat(values.size).isEqualTo(4)
+            assertThat(values.size).isEqualTo(3)
             values.forEach { assertThat(it).isIn(Range.closed(0f, 1f)) }
         }
 
@@ -210,7 +232,7 @@
                 testScope,
             )
 
-            assertThat(values.size).isEqualTo(5)
+            assertThat(values.size).isEqualTo(4)
             values.forEach { assertThat(it).isIn(Range.closed(-100f, 0f)) }
         }
 
diff --git a/packages/SystemUI/multivalentTests/src/com/android/systemui/keyguard/ui/viewmodel/GoneToDreamingTransitionViewModelTest.kt b/packages/SystemUI/multivalentTests/src/com/android/systemui/keyguard/ui/viewmodel/GoneToDreamingTransitionViewModelTest.kt
index 3c07034..897ce6d 100644
--- a/packages/SystemUI/multivalentTests/src/com/android/systemui/keyguard/ui/viewmodel/GoneToDreamingTransitionViewModelTest.kt
+++ b/packages/SystemUI/multivalentTests/src/com/android/systemui/keyguard/ui/viewmodel/GoneToDreamingTransitionViewModelTest.kt
@@ -61,7 +61,7 @@
 
             // Only three values should be present, since the dream overlay runs for a small
             // fraction of the overall animation time
-            assertThat(values.size).isEqualTo(5)
+            assertThat(values.size).isEqualTo(4)
             values.forEach { assertThat(it).isIn(Range.closed(0f, 1f)) }
         }
 
@@ -84,7 +84,7 @@
                 testScope,
             )
 
-            assertThat(values.size).isEqualTo(5)
+            assertThat(values.size).isEqualTo(4)
             values.forEach { assertThat(it).isIn(Range.closed(0f, 100f)) }
         }
 
diff --git a/packages/SystemUI/multivalentTests/src/com/android/systemui/keyguard/ui/viewmodel/LockscreenToDreamingTransitionViewModelTest.kt b/packages/SystemUI/multivalentTests/src/com/android/systemui/keyguard/ui/viewmodel/LockscreenToDreamingTransitionViewModelTest.kt
index a346e8b..4843f8b 100644
--- a/packages/SystemUI/multivalentTests/src/com/android/systemui/keyguard/ui/viewmodel/LockscreenToDreamingTransitionViewModelTest.kt
+++ b/packages/SystemUI/multivalentTests/src/com/android/systemui/keyguard/ui/viewmodel/LockscreenToDreamingTransitionViewModelTest.kt
@@ -75,7 +75,7 @@
 
             // Only three values should be present, since the dream overlay runs for a small
             // fraction of the overall animation time
-            assertThat(values.size).isEqualTo(5)
+            assertThat(values.size).isEqualTo(4)
             values.forEach { assertThat(it).isIn(Range.closed(0f, 1f)) }
         }
 
@@ -98,10 +98,10 @@
                 testScope = testScope,
             )
 
-            assertThat(values.size).isEqualTo(6)
+            assertThat(values.size).isEqualTo(5)
             values.forEach { assertThat(it).isIn(Range.closed(0f, 100f)) }
             // Validate finished value
-            assertThat(values[5]).isEqualTo(0f)
+            assertThat(values[4]).isEqualTo(0f)
         }
 
     @Test
diff --git a/packages/SystemUI/multivalentTests/src/com/android/systemui/keyguard/ui/viewmodel/LockscreenToOccludedTransitionViewModelTest.kt b/packages/SystemUI/multivalentTests/src/com/android/systemui/keyguard/ui/viewmodel/LockscreenToOccludedTransitionViewModelTest.kt
index 274bde1..a1b8aab 100644
--- a/packages/SystemUI/multivalentTests/src/com/android/systemui/keyguard/ui/viewmodel/LockscreenToOccludedTransitionViewModelTest.kt
+++ b/packages/SystemUI/multivalentTests/src/com/android/systemui/keyguard/ui/viewmodel/LockscreenToOccludedTransitionViewModelTest.kt
@@ -76,7 +76,7 @@
             )
             // Only 3 values should be present, since the dream overlay runs for a small fraction
             // of the overall animation time
-            assertThat(values.size).isEqualTo(5)
+            assertThat(values.size).isEqualTo(4)
             values.forEach { assertThat(it).isIn(Range.closed(0f, 1f)) }
         }
 
@@ -99,7 +99,7 @@
                     ),
                 testScope = testScope,
             )
-            assertThat(values.size).isEqualTo(5)
+            assertThat(values.size).isEqualTo(4)
             values.forEach { assertThat(it).isIn(Range.closed(0f, 100f)) }
         }
 
@@ -121,11 +121,11 @@
                     ),
                 testScope = testScope,
             )
-            assertThat(values.size).isEqualTo(4)
+            assertThat(values.size).isEqualTo(3)
             values.forEach { assertThat(it).isIn(Range.closed(0f, 100f)) }
 
             // Cancel will reset the translation
-            assertThat(values[3]).isEqualTo(0)
+            assertThat(values[2]).isEqualTo(0)
         }
 
     @Test
diff --git a/packages/SystemUI/multivalentTests/src/com/android/systemui/keyguard/ui/viewmodel/OccludedToLockscreenTransitionViewModelTest.kt b/packages/SystemUI/multivalentTests/src/com/android/systemui/keyguard/ui/viewmodel/OccludedToLockscreenTransitionViewModelTest.kt
index d419d4a..2111ad5 100644
--- a/packages/SystemUI/multivalentTests/src/com/android/systemui/keyguard/ui/viewmodel/OccludedToLockscreenTransitionViewModelTest.kt
+++ b/packages/SystemUI/multivalentTests/src/com/android/systemui/keyguard/ui/viewmodel/OccludedToLockscreenTransitionViewModelTest.kt
@@ -95,7 +95,7 @@
                 testScope,
             )
 
-            assertThat(values.size).isEqualTo(5)
+            assertThat(values.size).isEqualTo(4)
             values.forEach { assertThat(it).isIn(Range.closed(-100f, 0f)) }
         }
 
diff --git a/packages/SystemUI/multivalentTests/src/com/android/systemui/keyguard/ui/viewmodel/PrimaryBouncerToGoneTransitionViewModelTest.kt b/packages/SystemUI/multivalentTests/src/com/android/systemui/keyguard/ui/viewmodel/PrimaryBouncerToGoneTransitionViewModelTest.kt
index f027bc8..90b8362 100644
--- a/packages/SystemUI/multivalentTests/src/com/android/systemui/keyguard/ui/viewmodel/PrimaryBouncerToGoneTransitionViewModelTest.kt
+++ b/packages/SystemUI/multivalentTests/src/com/android/systemui/keyguard/ui/viewmodel/PrimaryBouncerToGoneTransitionViewModelTest.kt
@@ -95,7 +95,7 @@
                 testScope,
             )
 
-            assertThat(values.size).isEqualTo(3)
+            assertThat(values.size).isEqualTo(1)
             values.forEach { assertThat(it).isEqualTo(0f) }
         }
 
@@ -107,7 +107,7 @@
             keyguardTransitionRepository.sendTransitionStep(step(0f, TransitionState.STARTED))
             keyguardTransitionRepository.sendTransitionStep(step(1f))
 
-            assertThat(values.size).isEqualTo(2)
+            assertThat(values.size).isEqualTo(1)
             values.forEach { assertThat(it).isEqualTo(0f) }
         }
 
@@ -121,7 +121,7 @@
             keyguardTransitionRepository.sendTransitionStep(step(0f, TransitionState.STARTED))
             keyguardTransitionRepository.sendTransitionStep(step(1f))
 
-            assertThat(values.size).isEqualTo(2)
+            assertThat(values.size).isEqualTo(1)
             values.forEach { assertThat(it).isEqualTo(1f) }
         }
 
@@ -135,7 +135,7 @@
             keyguardTransitionRepository.sendTransitionStep(step(0f, TransitionState.STARTED))
             keyguardTransitionRepository.sendTransitionStep(step(1f))
 
-            assertThat(values.size).isEqualTo(2)
+            assertThat(values.size).isEqualTo(1)
             values.forEach { assertThat(it).isEqualTo(1f) }
         }
 
diff --git a/packages/SystemUI/src/com/android/systemui/keyguard/ui/KeyguardTransitionAnimationFlow.kt b/packages/SystemUI/src/com/android/systemui/keyguard/ui/KeyguardTransitionAnimationFlow.kt
index 1277585..cf1d247 100644
--- a/packages/SystemUI/src/com/android/systemui/keyguard/ui/KeyguardTransitionAnimationFlow.kt
+++ b/packages/SystemUI/src/com/android/systemui/keyguard/ui/KeyguardTransitionAnimationFlow.kt
@@ -32,6 +32,7 @@
 import kotlin.time.Duration.Companion.milliseconds
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.distinctUntilChanged
 import kotlinx.coroutines.flow.filterNotNull
 import kotlinx.coroutines.flow.map
 
@@ -89,7 +90,6 @@
             val start = (startTime / transitionDuration).toFloat()
             val chunks = (transitionDuration / duration).toFloat()
             logger.logCreate(name, start)
-            var isComplete = true
 
             fun stepToValue(step: TransitionStep): Float? {
                 val value = (step.value - start) * chunks
@@ -98,17 +98,13 @@
                     // middle, it is possible this animation is being skipped but we need to inform
                     // the ViewModels of the last update
                     STARTED -> {
-                        isComplete = false
                         onStart?.invoke()
                         max(0f, min(1f, value))
                     }
                     // Always send a final value of 1. Because of rounding, [value] may never be
                     // exactly 1.
                     RUNNING ->
-                        if (isComplete) {
-                            null
-                        } else if (value >= 1f) {
-                            isComplete = true
+                        if (value >= 1f) {
                             1f
                         } else if (value >= 0f) {
                             value
@@ -132,6 +128,7 @@
                     value
                 }
                 .filterNotNull()
+                .distinctUntilChanged()
         }
 
         /**