change how cross-room jumping works

lib/controllers/contextual_event.dart

@@ -1,16 +0,0 @@
-import "package:flutter_riverpod/flutter_riverpod.dart";
-
-class ContextualEventController(String? _) extends Notifier<int?> {
-  @override
-  int? build() => null;
-
-  void set(int? event) => state = event;
-
-  @override
-  bool updateShouldNotify(_, _) => true;
-
-  static final provider =
-      NotifierProvider.family<ContextualEventController, int?, String?>(
-        ContextualEventController.new,
-      );
-}

lib/controllers/jump_request.dart

@@ -0,0 +1,17 @@
+import "package:flutter_riverpod/flutter_riverpod.dart";
+
+typedef JumpRequest = ({String roomId, int rowId});
+
+class JumpRequestController extends Notifier<JumpRequest?> {
+  @override
+  JumpRequest? build() => null;
+
+  void request(String roomId, int rowId) =>
+      state = (roomId: roomId, rowId: rowId);
+
+  void consume() => state = null;
+
+  static final provider = NotifierProvider<JumpRequestController, JumpRequest?>(
+    JumpRequestController.new,
+  );
+}

lib/helpers/extensions/focus_room.dart

@@ -1,6 +1,6 @@
 import "package:collection/collection.dart";
 import "package:flutter_riverpod/experimental/mutation.dart";
-import "package:nexus/controllers/contextual_event.dart";
+import "package:nexus/controllers/jump_request.dart";
 import "package:nexus/controllers/key.dart";
 import "package:nexus/controllers/spaces.dart";
 import "package:nexus/models/space.dart";
@@ -31,16 +31,16 @@ extension FocusRoom on MutationTarget {
         .read(KeyController.provider(KeyController.spaceKey).notifier)
         .set(parent.id);
 
+    if (eventRowId != null) {
+      container
+          .read(JumpRequestController.provider.notifier)
+          .request(roomId, eventRowId);
+    }
+
     await container
         .read(KeyController.provider(KeyController.roomKey).notifier)
         .set(roomId);
 
-    if (eventRowId != null) {
-      container
-          .read(ContextualEventController.provider(roomId).notifier)
-          .set(eventRowId);
-    }
-
     return true;
   }
 }

lib/widgets/pages/chat.dart

@@ -1,7 +1,6 @@
 import "package:material_ui/material_ui.dart";
 import "package:hooks_riverpod/hooks_riverpod.dart";
 import "package:nexus/controllers/init_complete.dart";
-import "package:nexus/controllers/contextual_event.dart";
 import "package:nexus/controllers/key.dart";
 import "package:nexus/widgets/appbar.dart";
 import "package:nexus/widgets/sidebar.dart";
@@ -27,19 +26,11 @@ class const ChatPage({super.key}) extends HookConsumerWidget {
                   children: [
                     if (isDesktop) Sidebar(),
                     Expanded(
-                      child: Consumer(
-                        builder: (context, ref, _) {
-                          final initialHighlight = ref.watch(
-                            ContextualEventController.provider(roomId),
-                          );
-                          return RoomChat(
-                            key: ValueKey((roomId, initialHighlight)),
+                      child: RoomChat(
+                        key: ValueKey(roomId),
                         roomId: roomId,
                         isDesktop: isDesktop,
-                            initialHighlight: initialHighlight,
                         showMembersByDefault: showMembersByDefault,
-                          );
-                        },
                       ),
                     ),
                   ],

lib/widgets/room_chat/room_chat.dart

@@ -21,19 +21,24 @@ import "package:nexus/widgets/room_appbar.dart";
 import "package:nexus/main.dart";
 import "package:nexus/widgets/room_chat/chat_timeline.dart";
 import "package:nexus/helpers/extensions/build_event_options.dart";
+import "package:nexus/controllers/jump_request.dart";
 
 final class const RoomChat({
   required final String? roomId,
   required final bool isDesktop,
   required final bool showMembersByDefault,
-  final int? initialHighlight,
   super.key,
 }) extends HookConsumerWidget {
   @override
   Widget build(BuildContext context, WidgetRef ref) {
     final relatedEvent = useState<int?>(null);
     final relationType = useState(RelationType.reply);
-    final contextualEvent = useState<int?>(initialHighlight);
+    final pendingJump = ref.read(JumpRequestController.provider);
+    final contextualEvent = useState<int?>(
+      pendingJump != null && pendingJump.roomId == this.roomId
+          ? pendingJump.rowId
+          : null,
+    );
     final highlightedEvent = useState<int?>(null);
 
     final composerSize = useState<double>(64);
@@ -110,23 +115,23 @@ final class const RoomChat({
       });
     }
 
-    useEffect(() {
-      if (initialHighlight == null) return null;
+    ref.listen(JumpRequestController.provider, (_, request) {
+      if (request == null || request.roomId != roomId) return;
 
-      void check() {
+      void tryJump() {
         if (!context.mounted) return;
+        if (ref.read(JumpRequestController.provider) != request) return;
 
         if (scroll.scrollController.hasClients) {
-          jumpToEvent(initialHighlight!);
+          ref.read(JumpRequestController.provider.notifier).consume();
+          jumpToEvent(request.rowId);
         } else {
-          WidgetsBinding.instance.addPostFrameCallback((_) => check());
+          WidgetsBinding.instance.addPostFrameCallback((_) => tryJump());
         }
       }
 
-      check();
-
-      return null;
-    }, [initialHighlight]);
+      WidgetsBinding.instance.addPostFrameCallback((_) => tryJump());
+    });
 
     IList<PopupMenuEntry> getEventOptions(Event event) =>
         event.buildEventOptions(