#597 fixed multi-page context update when removing burst entries in viewer

CHANGELOG.md

@@ -8,6 +8,10 @@ All notable changes to this project will be documented in this file.
 
 - Collection: support for Sony predictive capture as burst
 
+### Fixed
+
+- Viewer: multi-page context update when removing burst entries
+
 ## <a id="v1.8.5"></a>[v1.8.5] - 2023-04-18
 
 ### Added

lib/widgets/viewer/entry_viewer_stack.dart

@@ -697,7 +697,20 @@ class _EntryViewerStackState extends State<EntryViewerStack> with EntryViewContr
 
     if (hasCollection) {
       final collectionEntries = collection!.sortedEntries;
-      removedEntries.forEach(collectionEntries.remove);
+      removedEntries.forEach((removedEntry) {
+        // remove from collection
+        if (collectionEntries.remove(removedEntry)) return;
+
+        // remove from burst
+        final mainEntry = collectionEntries.firstWhereOrNull((entry) => entry.burstEntries?.contains(removedEntry) == true);
+        if (mainEntry != null) {
+          final multiPageController = context.read<MultiPageConductor>().getController(mainEntry);
+          if (multiPageController != null) {
+            mainEntry.burstEntries!.remove(removedEntry);
+            multiPageController.reset();
+          }
+        }
+      });
       if (collectionEntries.isNotEmpty) {
         _onCollectionChanged();
         return;

lib/widgets/viewer/multipage/controller.dart

@@ -1,4 +1,5 @@
 import 'dart:async';
+import 'dart:math';
 
 import 'package:aves/model/entry/entry.dart';
 import 'package:aves/model/entry/extensions/multipage.dart';
@@ -23,13 +24,20 @@ class MultiPageController {
   set page(int? page) => pageNotifier.value = page;
 
   MultiPageController(this.entry) {
-    entry.getMultiPageInfo().then((value) {
-      if (value == null || _disposed) return;
-      pageNotifier.value = value.defaultPage?.index ?? 0;
-      _info = value;
+    reset();
+  }
+
+  void reset() => entry.getMultiPageInfo().then((info) {
+        if (info == null || _disposed) return;
+        final currentPage = pageNotifier.value;
+        if (currentPage == null) {
+          pageNotifier.value = info.defaultPage?.index ?? 0;
+        } else {
+          pageNotifier.value = min(currentPage, info.pageCount - 1);
+        }
+        _info = info;
         _infoStreamController.add(_info);
       });
-  }
 
   void dispose() {
     _disposed = true;