Save deleted images in cache, closes #465

app/lib/services/asset.dart

@@ -7,6 +7,7 @@ import '../helpers/element_helper.dart';
 
 class AssetService {
   final NoteData document;
+  final Map<String, Uint8List> _cached = {};
   final Map<String, ui.Image> _images = {};
 
   AssetService(this.document);
@@ -15,11 +16,15 @@ class AssetService {
     if (_images.containsKey(path)) {
       return _images[path]!.clone();
     }
-    final data = await getDataFromSource(document, path);
-    if (data == null) {
-      return null;
+    var listData = await getDataFromSource(document, path);
+    if (listData == null) {
+      listData = _cached[path];
+      if (listData == null) return null;
+      document.setAsset(Uri.parse(path).path, listData);
     }
-    final codec = await ui.instantiateImageCodec(Uint8List.fromList(data));
+    final data = Uint8List.fromList(listData);
+    _cached[path] = data;
+    final codec = await ui.instantiateImageCodec(data);
     final frameInfo = await codec.getNextFrame();
     final image = frameInfo.image;
     _images[path] = image;

fastlane/metadata/android/en-US/changelogs/70.txt

@@ -1,11 +1,13 @@
 * Add sort order ([#469](https://github.com/LinwoodDev/Butterfly/issues/469))
 * Save sort state ([#469](https://github.com/LinwoodDev/Butterfly/issues/469))
+* Save deleted images in cache
+  * Fix pasting images not working ([#465](https://github.com/LinwoodDev/Butterfly/issues/465))
 * Improve save state icons
 * Improve import painter position
 * Improve hit calculation on single point pen elements
 * Improve performance of quick start view in home page ([#459](https://github.com/LinwoodDev/Butterfly/issues/459))
-* Set position to clicked when pasting ([#465](https://github.com/LinwoodDev/Butterfly/issues/465))
+* Set position to clicked when pasting ([#468](https://github.com/LinwoodDev/Butterfly/issues/468))
 * Fix native title bar error on mobile devices
 * Fix internet problems on android ([#457](https://github.com/LinwoodDev/Butterfly/issues/457))
-* Fix position when pasting elements ([#465](https://github.com/LinwoodDev/Butterfly/issues/465))
+* Fix position when pasting elements ([#468](https://github.com/LinwoodDev/Butterfly/issues/468))
 * Fix corner hit detection on hand tool when zoomed