Jump to unread marker instead of first unread message (#8305)

Author: yostyle

changelog.d/8268.bugfix

@@ -0,0 +1 @@
+The read marker is stuck in the past

vector/src/main/java/im/vector/app/features/home/room/detail/RoomDetailAction.kt

@@ -39,7 +39,7 @@ sealed class RoomDetailAction : VectorViewModelAction {
     data class UndoReaction(val targetEventId: String, val reaction: String, val reason: String? = "") : RoomDetailAction()
     data class RedactAction(val targetEventId: String, val reason: String? = "") : RoomDetailAction()
     data class UpdateQuickReactAction(val targetEventId: String, val selectedReaction: String, val add: Boolean) : RoomDetailAction()
-    data class NavigateToEvent(val eventId: String, val highlight: Boolean) : RoomDetailAction()
+    data class NavigateToEvent(val eventId: String, val highlight: Boolean, val isFirstUnreadEvent: Boolean = false) : RoomDetailAction()
     object MarkAllAsRead : RoomDetailAction()
     data class DownloadOrOpen(val eventId: String, val senderId: String?, val messageFileContent: MessageWithAttachmentContent) : RoomDetailAction()
     object JoinAndOpenReplacementRoom : RoomDetailAction()

vector/src/main/java/im/vector/app/features/home/room/detail/RoomDetailViewEvents.kt

@@ -41,7 +41,7 @@ sealed class RoomDetailViewEvents : VectorViewEvents {
 
     data class OpenRoom(val roomId: String, val closeCurrentRoom: Boolean = false) : RoomDetailViewEvents()
 
-    data class NavigateToEvent(val eventId: String) : RoomDetailViewEvents()
+    data class NavigateToEvent(val eventId: String, val isFirstUnreadEvent: Boolean) : RoomDetailViewEvents()
     data class JoinJitsiConference(val widget: Widget, val withVideo: Boolean) : RoomDetailViewEvents()
     object LeaveJitsiConference : RoomDetailViewEvents()
 

vector/src/main/java/im/vector/app/features/home/room/detail/TimelineFragment.kt

@@ -748,7 +748,9 @@ class TimelineFragment :
     }
 
     private fun navigateToEvent(action: RoomDetailViewEvents.NavigateToEvent) {
-        val scrollPosition = timelineEventController.searchPositionOfEvent(action.eventId)
+        val scrollPosition = timelineEventController.getPositionOfReadMarker().takeIf { action.isFirstUnreadEvent }
+                ?: timelineEventController.searchPositionOfEvent(action.eventId)
+
         if (scrollPosition == null) {
             scrollOnHighlightedEventCallback.scheduleScrollTo(action.eventId)
         } else {
@@ -1995,10 +1997,10 @@ class TimelineFragment :
 
     private fun onJumpToReadMarkerClicked() = withState(timelineViewModel) {
         if (it.unreadState is UnreadState.HasUnread) {
-            timelineViewModel.handle(RoomDetailAction.NavigateToEvent(it.unreadState.firstUnreadEventId, false))
+            timelineViewModel.handle(RoomDetailAction.NavigateToEvent(it.unreadState.firstUnreadEventId, highlight = false, isFirstUnreadEvent = true))
         }
         if (it.unreadState is UnreadState.ReadMarkerNotLoaded) {
-            timelineViewModel.handle(RoomDetailAction.NavigateToEvent(it.unreadState.readMarkerId, false))
+            timelineViewModel.handle(RoomDetailAction.NavigateToEvent(it.unreadState.readMarkerId, highlight = false))
         }
     }
 

vector/src/main/java/im/vector/app/features/home/room/detail/TimelineViewModel.kt

@@ -1033,7 +1033,7 @@ class TimelineViewModel @AssistedInject constructor(
         if (action.highlight) {
             setState { copy(highlightedEventId = targetEventId) }
         }
-        _viewEvents.post(RoomDetailViewEvents.NavigateToEvent(targetEventId))
+        _viewEvents.post(RoomDetailViewEvents.NavigateToEvent(targetEventId, action.isFirstUnreadEvent))
     }
 
     private fun handleResendEvent(action: RoomDetailAction.ResendMessage) {