Use state to support back pressed callback.

app/src/main/java/org/thoughtcrime/securesms/conversation/ConversationReactionDelegate.java

@@ -47,10 +47,6 @@ public final class ConversationReactionDelegate {
     overlayStub.get().hide();
   }
 
-  public void hideForReactWithAny() {
-    overlayStub.get().hideForReactWithAny();
-  }
-
   public void setOnReactionSelectedListener(@NonNull ConversationReactionOverlay.OnReactionSelectedListener onReactionSelectedListener) {
     this.onReactionSelectedListener = onReactionSelectedListener;
 

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/ConversationFragment.kt

@@ -86,6 +86,7 @@ import io.reactivex.rxjava3.disposables.Disposable
 import io.reactivex.rxjava3.kotlin.subscribeBy
 import io.reactivex.rxjava3.schedulers.Schedulers
 import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.flow.collectLatest
 import kotlinx.coroutines.flow.distinctUntilChanged
 import kotlinx.coroutines.flow.flowOn
 import kotlinx.coroutines.launch
@@ -511,13 +512,18 @@ class ConversationFragment :
   private lateinit var threadHeaderMarginDecoration: ThreadHeaderMarginDecoration
   private lateinit var conversationItemDecorations: ConversationItemDecorations
   private lateinit var optionsMenuCallback: ConversationOptionsMenuCallback
-  private lateinit var backPressedCallback: BackPressedDelegate
 
   private var animationsAllowed = false
   private var actionMode: ActionMode? = null
   private var pinnedShortcutReceiver: BroadcastReceiver? = null
   private var searchMenuItem: MenuItem? = null
+
   private var isSearchRequested: Boolean = false
+    set(value) {
+      field = value
+      viewModel.setIsSearchRequested(value)
+    }
+
   private var previousPage: KeyboardPage? = null
   private var previousPages: Set<KeyboardPage>? = null
   private var reShowScheduleMessagesBar: Boolean = false
@@ -939,8 +945,16 @@ class ConversationFragment :
 
     activity?.supportStartPostponedEnterTransition()
 
-    backPressedCallback = BackPressedDelegate()
-    requireActivity().onBackPressedDispatcher.addCallback(viewLifecycleOwner, backPressedCallback)
+    val backPressedDelegate = BackPressedDelegate()
+    requireActivity().onBackPressedDispatcher.addCallback(viewLifecycleOwner, backPressedDelegate)
+
+    lifecycleScope.launch {
+      repeatOnLifecycle(Lifecycle.State.RESUMED) {
+        viewModel.backPressedState.collectLatest {
+          backPressedDelegate.isEnabled = it.shouldHandleBackPressed()
+        }
+      }
+    }
 
     menuProvider?.afterFirstRenderMode = true
 
@@ -2217,6 +2231,7 @@ class ConversationFragment :
     reactionDelegate.setOnActionSelectedListener(onActionSelectedListener)
     reactionDelegate.setOnHideListener(onHideListener)
     reactionDelegate.show(requireActivity(), viewModel.recipientSnapshot!!, conversationMessage, conversationGroupViewModel.isNonAdminInAnnouncementGroup(), selectedConversationModel)
+    viewModel.setIsReactionDelegateShowing(true)
     composeText.clearFocus()
   }
 
@@ -2344,18 +2359,15 @@ class ConversationFragment :
       }
   }
 
-  private inner class BackPressedDelegate : OnBackPressedCallback(true) {
+  private inner class BackPressedDelegate : OnBackPressedCallback(false) {
     override fun handleOnBackPressed() {
       Log.d(TAG, "onBackPressed()")
-      if (reactionDelegate.isShowing) {
+      val state = viewModel.backPressedState.value
+
+      if (state.isReactionDelegateShowing) {
         reactionDelegate.hide()
-      } else if (isSearchRequested) {
+      } else if (state.isSearchRequested) {
         searchMenuItem?.collapseActionView()
-      } else if (args.conversationScreenType.isInBubble) {
-        isEnabled = false
-        requireActivity().onBackPressed()
-      } else {
-        requireActivity().finish()
       }
     }
   }
@@ -3255,6 +3267,8 @@ class ConversationFragment :
               }
 
               override fun onHide() {
+                viewModel.setIsReactionDelegateShowing(false)
+
                 if (!lifecycle.currentState.isAtLeast(Lifecycle.State.STARTED) || activity == null || activity?.isFinishing == true) {
                   return
                 }

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/ConversationViewModel.kt

@@ -32,11 +32,14 @@ import io.reactivex.rxjava3.subjects.PublishSubject
 import io.reactivex.rxjava3.subjects.Subject
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.flow.flowOf
 import kotlinx.coroutines.flow.flowOn
 import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.flow.mapNotNull
+import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.rx3.asFlow
 import org.signal.core.util.orNull
@@ -191,6 +194,9 @@ class ConversationViewModel(
   val jumpToDateValidator: JumpToDateValidator
     get() = _jumpToDateValidator
 
+  private val internalBackPressedState = MutableStateFlow(BackPressedState())
+  val backPressedState: StateFlow<BackPressedState> = internalBackPressedState
+
   init {
     disposables += recipient
       .subscribeBy {
@@ -604,4 +610,23 @@ class ConversationViewModel(
       .getEarliestMessageSentDate(threadId)
       .observeOn(AndroidSchedulers.mainThread())
   }
+
+  fun setIsReactionDelegateShowing(isReactionDelegateShowing: Boolean) {
+    internalBackPressedState.update {
+      it.copy(isReactionDelegateShowing = isReactionDelegateShowing)
+    }
+  }
+
+  fun setIsSearchRequested(isSearchRequested: Boolean) {
+    internalBackPressedState.update {
+      it.copy(isSearchRequested = isSearchRequested)
+    }
+  }
+
+  data class BackPressedState(
+    val isReactionDelegateShowing: Boolean = false,
+    val isSearchRequested: Boolean = false
+  ) {
+    fun shouldHandleBackPressed() = isSearchRequested || isReactionDelegateShowing
+  }
 }