collection: fixed action delegate when app bar state was changed

lib/widgets/collection/app_bar.dart

@@ -46,7 +46,7 @@ class CollectionAppBar extends StatefulWidget {
 
 class _CollectionAppBarState extends State<CollectionAppBar> with SingleTickerProviderStateMixin {
   final TextEditingController _searchFieldController = TextEditingController();
-  late EntrySetActionDelegate _actionDelegate;
+  final EntrySetActionDelegate _actionDelegate = EntrySetActionDelegate();
   late AnimationController _browseToSelectAnimation;
   late Future<bool> _canAddShortcutsLoader;
 
@@ -59,9 +59,6 @@ class _CollectionAppBarState extends State<CollectionAppBar> with SingleTickerPr
   @override
   void initState() {
     super.initState();
-    _actionDelegate = EntrySetActionDelegate(
-      collection: collection,
-    );
     _browseToSelectAnimation = AnimationController(
       duration: Durations.iconAnimation,
       vsync: this,

lib/widgets/collection/entry_set_action_delegate.dart

@@ -3,11 +3,9 @@ import 'dart:async';
 import 'package:aves/model/actions/collection_actions.dart';
 import 'package:aves/model/actions/entry_actions.dart';
 import 'package:aves/model/actions/move_type.dart';
-import 'package:aves/model/entry.dart';
 import 'package:aves/model/filters/album.dart';
 import 'package:aves/model/highlight.dart';
 import 'package:aves/model/source/collection_lens.dart';
-import 'package:aves/model/source/collection_source.dart';
 import 'package:aves/services/android_app_service.dart';
 import 'package:aves/services/image_op_events.dart';
 import 'package:aves/services/services.dart';
@@ -27,23 +25,14 @@ import 'package:pedantic/pedantic.dart';
 import 'package:provider/provider.dart';
 
 class EntrySetActionDelegate with FeedbackMixin, PermissionAwareMixin, SizeAwareMixin {
-  final CollectionLens collection;
-
-  CollectionSource get source => collection.source;
-
-  Set<AvesEntry> get selection => collection.selection;
-
-  EntrySetActionDelegate({
-    required this.collection,
-  });
-
   void onEntryActionSelected(BuildContext context, EntryAction action) {
     switch (action) {
       case EntryAction.delete:
         _showDeleteDialog(context);
         break;
       case EntryAction.share:
-        AndroidAppService.shareEntries(selection).then((success) {
+        final collection = context.read<CollectionLens>();
+        AndroidAppService.shareEntries(collection.selection).then((success) {
           if (!success) showNoMatchingAppDialog(context);
         });
         break;
@@ -61,15 +50,24 @@ class EntrySetActionDelegate with FeedbackMixin, PermissionAwareMixin, SizeAware
         _moveSelection(context, moveType: MoveType.move);
         break;
       case CollectionAction.refreshMetadata:
-        source.refreshMetadata(selection);
+        _refreshMetadata(context);
-        collection.browse();
         break;
       default:
         break;
     }
   }
 
+  void _refreshMetadata(BuildContext context) {
+    final collection = context.read<CollectionLens>();
+    collection.source.refreshMetadata(collection.selection);
+    collection.browse();
+  }
+
   Future<void> _moveSelection(BuildContext context, {required MoveType moveType}) async {
+    final collection = context.read<CollectionLens>();
+    final source = collection.source;
+    final selection = collection.selection;
+
     final selectionDirs = selection.where((e) => e.path != null).map((e) => e.directory).cast<String>().toSet();
     if (moveType == MoveType.move) {
       // check whether moving is possible given OS restrictions,
@@ -105,6 +103,8 @@ class EntrySetActionDelegate with FeedbackMixin, PermissionAwareMixin, SizeAware
 
     final copy = moveType == MoveType.copy;
     final todoCount = todoEntries.length;
+    assert(todoCount > 0);
+
     source.pauseMonitoring();
     showOpReport<MoveOpEvent>(
       context: context,
@@ -179,6 +179,9 @@ class EntrySetActionDelegate with FeedbackMixin, PermissionAwareMixin, SizeAware
   }
 
   Future<void> _showDeleteDialog(BuildContext context) async {
+    final collection = context.read<CollectionLens>();
+    final source = collection.source;
+    final selection = collection.selection;
     final selectionDirs = selection.where((e) => e.path != null).map((e) => e.directory).cast<String>().toSet();
     final todoCount = selection.length;