Fix rendering issue when opening the story info sheet too fast.

app/src/main/java/org/thoughtcrime/securesms/stories/viewer/StoryViewerViewModel.kt

@@ -9,7 +9,9 @@ import io.reactivex.rxjava3.core.Flowable
 import io.reactivex.rxjava3.core.Observable
 import io.reactivex.rxjava3.core.Single
 import io.reactivex.rxjava3.disposables.CompositeDisposable
+import io.reactivex.rxjava3.disposables.Disposable
 import io.reactivex.rxjava3.kotlin.plusAssign
+import io.reactivex.rxjava3.kotlin.subscribeBy
 import io.reactivex.rxjava3.subjects.BehaviorSubject
 import org.thoughtcrime.securesms.database.model.MmsMessageRecord
 import org.thoughtcrime.securesms.recipients.RecipientId
@@ -17,7 +19,10 @@ import org.thoughtcrime.securesms.stories.Stories
 import org.thoughtcrime.securesms.stories.StoryViewerArgs
 import org.thoughtcrime.securesms.util.FeatureFlags
 import org.thoughtcrime.securesms.util.rx.RxStore
+import java.util.concurrent.TimeUnit
 import kotlin.math.max
+import kotlin.time.Duration
+import kotlin.time.Duration.Companion.milliseconds
 
 class StoryViewerViewModel(
   private val storyViewerArgs: StoryViewerArgs,
@@ -62,6 +67,25 @@ class StoryViewerViewModel(
   val isChildScrolling: Observable<Boolean> = childScrollStatePublisher.distinctUntilChanged()
   val isFirstTimeNavigationShowing: Observable<Boolean> = firstTimeNavigationPublisher.distinctUntilChanged()
 
+  /**
+   * Post an action *after* the story load state is ready.
+   * A slight delay is applied here to ensure that animations settle
+   * before the action takes place. Otherwise, some strange windowing
+   * problems can occur.
+   */
+  fun postAfterLoadStateReady(
+    delay: Duration = 100.milliseconds,
+    action: () -> Unit
+  ): Disposable {
+    return loadState
+      .filter { it.isReady() }
+      .delay(delay.inWholeMilliseconds, TimeUnit.MILLISECONDS)
+      .firstOrError()
+      .ignoreElement()
+      .observeOn(AndroidSchedulers.mainThread())
+      .subscribeBy { action() }
+  }
+
   fun addHiddenAndRefresh(hidden: Set<RecipientId>) {
     this.hidden.addAll(hidden)
     refresh()

app/src/main/java/org/thoughtcrime/securesms/stories/viewer/page/StoryViewerPageFragment.kt

@@ -451,7 +451,10 @@ class StoryViewerPageFragment :
         if (storyViewerPageArgs.source == StoryViewerPageArgs.Source.NOTIFICATION) {
           startReply(isFromNotification = true, groupReplyStartPosition = storyViewerPageArgs.groupReplyStartPosition)
         } else if (storyViewerPageArgs.source == StoryViewerPageArgs.Source.INFO_CONTEXT && state.selectedPostIndex in state.posts.indices) {
-          showInfo(state.posts[state.selectedPostIndex])
+          viewModel.setIsDisplayingInfoDialog(true)
+          lifecycleDisposable += sharedViewModel.postAfterLoadStateReady {
+            showInfo(state.posts[state.selectedPostIndex])
+          }
         }
       }
     }