Prevent chat window corner radius getting stuck after back gesture is cancelled

app/src/main/java/org/thoughtcrime/securesms/window/AppScaffoldAnimationState.kt

@@ -119,4 +119,4 @@ class AppScaffoldAnimationStateFactory(
       AppScaffoldNavigator.NavigationState.RELEASE -> defaultDetailReleaseAnimationState(latestDetailSeekState)
     }
   }
-}
+}

app/src/main/java/org/thoughtcrime/securesms/window/AppScaffoldAnimators.kt

@@ -16,7 +16,6 @@ import androidx.compose.material3.adaptive.layout.PaneAdaptedValue
 import androidx.compose.material3.adaptive.layout.ThreePaneScaffoldPaneScope
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.State
-import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.ui.unit.Dp
@@ -220,24 +219,32 @@ fun ThreePaneScaffoldPaneScope.defaultDetailSeekAnimationState(): AppScaffoldAni
 @OptIn(ExperimentalMaterial3AdaptiveApi::class)
 @Composable
 fun ThreePaneScaffoldPaneScope.defaultDetailReleaseAnimationState(from: AppScaffoldAnimationState): AppScaffoldAnimationState {
-  val scale = remember { from.contentScale }
-  val offset = remember { from.contentOffset }
-  val corners = remember { from.contentCorners }
+  val initialScale = remember { from.contentScale }
+  val initialOffset = remember { from.contentOffset }
 
-  val scaleState = remember { mutableStateOf(scale) }
-  val offsetState = remember { mutableStateOf(offset) }
-  val cornersState = remember { mutableStateOf(corners) }
+  val scale = animateFloat(
+    targetWhenHiding = { initialScale },
+    targetWhenShowing = { 1f }
+  )
+
+  val offset = animateDp(
+    targetWhenHiding = { initialOffset },
+    targetWhenShowing = { 0.dp }
+  )
+
+  val cornersState = animateDp(
+    targetWhenHiding = { 0.dp },
+    targetWhenShowing = { 0.dp }
+  )
 
   val alpha = animateFloat { 1f }
 
-  return remember {
-    AppScaffoldAnimationState(
-      scale = scaleState,
-      scaleMinimum = from.scaleMinimum,
-      offset = offsetState,
-      corners = cornersState,
-      cornersMaximum = from.cornersMaximum,
-      alpha = alpha
-    )
-  }
-}
+  return AppScaffoldAnimationState(
+    scale = scale,
+    scaleMinimum = from.scaleMinimum,
+    offset = offset,
+    corners = cornersState,
+    cornersMaximum = 0.dp,
+    alpha = alpha
+  )
+}

app/src/main/java/org/thoughtcrime/securesms/window/AppScaffoldNavigator.kt

@@ -35,17 +35,19 @@ open class AppScaffoldNavigator<T> @RememberInComposition constructor(private va
   var state: NavigationState by mutableStateOf(NavigationState.ENTER)
     private set
 
+  private var wasSeekInProgress = false
+
   override suspend fun navigateTo(pane: ThreePaneScaffoldRole, contentKey: T?) {
+    wasSeekInProgress = false
     state = NavigationState.ENTER
     return delegate.navigateTo(pane, contentKey)
   }
 
   override suspend fun navigateBack(backNavigationBehavior: BackNavigationBehavior): Boolean {
-    if (state == NavigationState.SEEK) {
+    if (state == NavigationState.SEEK || wasSeekInProgress) {
+      wasSeekInProgress = false
       state = NavigationState.RELEASE
-    }
-
-    if (state == NavigationState.ENTER) {
+    } else if (state == NavigationState.ENTER) {
       state = NavigationState.EXIT
     }
 
@@ -54,7 +56,10 @@ open class AppScaffoldNavigator<T> @RememberInComposition constructor(private va
 
   override suspend fun seekBack(backNavigationBehavior: BackNavigationBehavior, fraction: Float) {
     if (fraction > 0f && state != NavigationState.SEEK) {
+      wasSeekInProgress = true
       state = NavigationState.SEEK
+    } else if (fraction < 0.001f && state == NavigationState.SEEK) {
+      state = NavigationState.ENTER
     }
 
     return delegate.seekBack(backNavigationBehavior, fraction)
@@ -133,4 +138,4 @@ fun rememberThreePaneScaffoldNavigatorDelegate(
       defaultPanePreferredWidth = defaultPanePreferredWidth
     )
   )
-}
+}