feat(ui): TimelineInner::add_events_with_diffs supports more `Vecto…

…rDiff`.

This patch updates `TimelineInner::add_events_with_diffs` to
support more `VectorDiff` variant, notably `Insert` which uses
`TimelineNewItemPosition::At`.

crates/matrix-sdk-ui/src/timeline/inner/mod.rs

@@ -582,6 +582,8 @@ impl<P: RoomDataProvider> TimelineInner<P> {
  return result;
  }
 
+ let room_data_provider = &self.room_data_provider;
+ let settings = &self.settings;
  let mut state = self.state.write().await;
 
  for diff in diffs {
@@ -592,8 +594,41 @@ impl<P: RoomDataProvider> TimelineInner<P> {
  .add_remote_events_at(
  events,
  TimelineNewItemPosition::End { origin },
- &self.room_data_provider,
- &self.settings,
+ room_data_provider,
+ settings,
+ )
+ .await
+ }
+
+ VectorDiff::PushFront { value } => {
+ state
+ .add_remote_events_at(
+ [value],
+ TimelineNewItemPosition::Start { origin },
+ room_data_provider,
+ settings,
+ )
+ .await
+ }
+
+ VectorDiff::PushBack { value } => {
+ state
+ .add_remote_events_at(
+ [value],
+ TimelineNewItemPosition::End { origin },
+ room_data_provider,
+ settings,
+ )
+ .await
+ }
+
+ VectorDiff::Insert { index: event_index, value } => {
+ state
+ .add_remote_events_at(
+ [value],
+ TimelineNewItemPosition::At { event_index, origin },
+ room_data_provider,
+ settings,
  )
  .await
  }