Improve comic image loading retry

lib/foundation/global_state.dart

@@ -9,7 +9,7 @@ abstract class GlobalState {
 
   static T find<T extends State>([Object? key]) {
     for (var pair in _state) {
-      if (pair.left == key && pair.right is T) {
+      if ((key == null || pair.left == key) && pair.right is T) {
         return pair.right as T;
       }
     }
@@ -18,7 +18,7 @@ abstract class GlobalState {
 
   static T? findOrNull<T extends State>([Object? key]) {
     for (var pair in _state) {
-      if (pair.left == key && pair.right is T) {
+      if ((key == null || pair.left == key) && pair.right is T) {
         return pair.right as T;
       }
     }

lib/pages/reader/comic_image.dart

@@ -24,8 +24,7 @@ class ComicImage extends StatefulWidget {
     Map<String, String>? headers,
     int? cacheWidth,
     int? cacheHeight,
-      }
+  })  : image = ResizeImage.resizeIfNeeded(cacheWidth, cacheHeight, image),
-  ): image = ResizeImage.resizeIfNeeded(cacheWidth, cacheHeight, image),
         assert(cacheWidth == null || cacheWidth > 0),
         assert(cacheHeight == null || cacheHeight > 0);
 
@@ -138,8 +137,8 @@ class _ComicImageState extends State<ComicImage> with WidgetsBindingObserver {
   }
 
   void _updateInvertColors() {
-    _invertColors = MediaQuery.maybeInvertColorsOf(context)
+    _invertColors = MediaQuery.maybeInvertColorsOf(context) ??
-        ?? SemanticsBinding.instance.accessibilityFeatures.invertColors;
+        SemanticsBinding.instance.accessibilityFeatures.invertColors;
   }
 
   void _resolveImage() {
@@ -150,14 +149,17 @@ class _ComicImageState extends State<ComicImage> with WidgetsBindingObserver {
     final ImageStream newStream =
         provider.resolve(createLocalImageConfiguration(
       context,
-      size: widget.width != null && widget.height != null ? Size(widget.width!, widget.height!) : null,
+      size: widget.width != null && widget.height != null
+          ? Size(widget.width!, widget.height!)
+          : null,
     ));
     _updateSourceStream(newStream);
   }
 
   ImageStreamListener? _imageStreamListener;
+
   ImageStreamListener _getListener({bool recreateListener = false}) {
-    if(_imageStreamListener == null || recreateListener) {
+    if (_imageStreamListener == null || recreateListener) {
       _lastException = null;
       _imageStreamListener = ImageStreamListener(
         _handleImageFrame,
@@ -191,7 +193,8 @@ class _ComicImageState extends State<ComicImage> with WidgetsBindingObserver {
 
   void _replaceImage({required ImageInfo? info}) {
     final ImageInfo? oldImageInfo = _imageInfo;
-    SchedulerBinding.instance.addPostFrameCallback((_) => oldImageInfo?.dispose());
+    SchedulerBinding.instance
+        .addPostFrameCallback((_) => oldImageInfo?.dispose());
     _imageInfo = info;
   }
 
@@ -208,7 +211,9 @@ class _ComicImageState extends State<ComicImage> with WidgetsBindingObserver {
     }
 
     if (!widget.gaplessPlayback) {
-      setState(() { _replaceImage(info: null); });
+      setState(() {
+        _replaceImage(info: null);
+      });
     }
 
     setState(() {
@@ -247,7 +252,9 @@ class _ComicImageState extends State<ComicImage> with WidgetsBindingObserver {
       return;
     }
 
-    if (keepStreamAlive && _completerHandle == null && _imageStream?.completer != null) {
+    if (keepStreamAlive &&
+        _completerHandle == null &&
+        _imageStream?.completer != null) {
       _completerHandle = _imageStream!.completer!.keepAlive();
     }
 
@@ -269,26 +276,41 @@ class _ComicImageState extends State<ComicImage> with WidgetsBindingObserver {
               children: [
                 Expanded(
                   child: Center(
-                    child: Text(_lastException.toString(), maxLines: 3,),
+                    child: Text(
+                      _lastException.toString(),
+                      maxLines: 3,
                     ),
                   ),
-                const SizedBox(height: 4,),
+                ),
+                const SizedBox(
+                  height: 4,
+                ),
                 MouseRegion(
                   cursor: SystemMouseCursors.click,
                   child: Listener(
-                    onPointerDown: (details){
+                    onPointerDown: (details) {
+                      GlobalState.find<_ReaderGestureDetectorState>().ignoreNextTap();
+                      setState(() {
+                        _loadingProgress = null;
+                        _lastException = null;
+                      });
                       _resolveImage();
                     },
-                    child: const SizedBox(
+                    child: SizedBox(
                       width: 84,
                       height: 36,
                       child: Center(
-                        child: Text("Retry", style: TextStyle(color: Colors.blue),),
+                        child: Text(
+                          "Retry".tl,
+                          style: TextStyle(color: Colors.blue),
                         ),
                       ),
                     ),
                   ),
-                const SizedBox(height: 16,),
+                ),
+                const SizedBox(
+                  height: 16,
+                ),
               ],
             ),
           ),
@@ -300,34 +322,32 @@ class _ComicImageState extends State<ComicImage> with WidgetsBindingObserver {
       var width = widget.width;
       var height = widget.height;
 
-      if(_imageInfo != null) {
+      if (_imageInfo != null) {
         // Record the height and the width of the image
-        _cache[widget.image.hashCode] = Size(
+        _cache[widget.image.hashCode] = Size(_imageInfo!.image.width.toDouble(),
-            _imageInfo!.image.width.toDouble(),
+            _imageInfo!.image.height.toDouble());
-            _imageInfo!.image.height.toDouble()
-        );
       }
 
       Size? cacheSize = _cache[widget.image.hashCode];
-      if(cacheSize != null){
+      if (cacheSize != null) {
-        if(width == double.infinity) {
+        if (width == double.infinity) {
           width = constrains.maxWidth;
           height = width * cacheSize.height / cacheSize.width;
-        } else if(height == double.infinity) {
+        } else if (height == double.infinity) {
           height = constrains.maxHeight;
           width = height * cacheSize.width / cacheSize.height;
         }
       } else {
-        if(width == double.infinity) {
+        if (width == double.infinity) {
           width = constrains.maxWidth;
           height = 300;
-        } else if(height == double.infinity) {
+        } else if (height == double.infinity) {
           height = constrains.maxHeight;
           width = 300;
         }
       }
 
-      if(_imageInfo != null){
+      if (_imageInfo != null) {
         // build image
         Widget result = RawImage(
           // Do not clone the image, because RawImage is a stateless wrapper.
@@ -379,12 +399,13 @@ class _ComicImageState extends State<ComicImage> with WidgetsBindingObserver {
               height: 24,
               child: CircularProgressIndicator(
                 strokeWidth: 3,
-                backgroundColor: context.colorScheme.surfaceContainerLow,
+                backgroundColor: context.colorScheme.surfaceContainer,
                 value: (_loadingProgress != null &&
-                    _loadingProgress!.expectedTotalBytes!=null &&
+                        _loadingProgress!.expectedTotalBytes != null &&
                         _loadingProgress!.expectedTotalBytes! != 0)
-                    ?_loadingProgress!.cumulativeBytesLoaded / _loadingProgress!.expectedTotalBytes!
+                    ? _loadingProgress!.cumulativeBytesLoaded /
-                    :0,
+                        _loadingProgress!.expectedTotalBytes!
+                    : 0,
               ),
             ),
           ),
@@ -398,8 +419,10 @@ class _ComicImageState extends State<ComicImage> with WidgetsBindingObserver {
     super.debugFillProperties(description);
     description.add(DiagnosticsProperty<ImageStream>('stream', _imageStream));
     description.add(DiagnosticsProperty<ImageInfo>('pixels', _imageInfo));
-    description.add(DiagnosticsProperty<ImageChunkEvent>('loadingProgress', _loadingProgress));
+    description.add(DiagnosticsProperty<ImageChunkEvent>(
+        'loadingProgress', _loadingProgress));
     description.add(DiagnosticsProperty<int>('frameNumber', _frameNumber));
-    description.add(DiagnosticsProperty<bool>('wasSynchronouslyLoaded', _wasSynchronouslyLoaded));
+    description.add(DiagnosticsProperty<bool>(
+        'wasSynchronouslyLoaded', _wasSynchronouslyLoaded));
   }
 }

lib/pages/reader/gesture.dart

@@ -9,7 +9,7 @@ class _ReaderGestureDetector extends StatefulWidget {
   State<_ReaderGestureDetector> createState() => _ReaderGestureDetectorState();
 }
 
-class _ReaderGestureDetectorState extends State<_ReaderGestureDetector> {
+class _ReaderGestureDetectorState extends AutomaticGlobalState<_ReaderGestureDetector> {
   late TapGestureRecognizer _tapGestureRecognizer;
 
   static const _kDoubleTapMaxTime = Duration(milliseconds: 200);
@@ -26,6 +26,12 @@ class _ReaderGestureDetectorState extends State<_ReaderGestureDetector> {
 
   late _ReaderState reader;
 
+  bool ignoreNextTag = false;
+
+  void ignoreNextTap() {
+    ignoreNextTag = true;
+  }
+
   @override
   void initState() {
     _tapGestureRecognizer = TapGestureRecognizer()
@@ -44,6 +50,10 @@ class _ReaderGestureDetectorState extends State<_ReaderGestureDetector> {
       behavior: HitTestBehavior.translucent,
       onPointerDown: (event) {
         fingers++;
+        if (ignoreNextTag) {
+          ignoreNextTag = false;
+          return;
+        }
         _lastTapPointer = event.pointer;
         _lastTapMoveDistance = Offset.zero;
         _tapGestureRecognizer.addPointer(event);
@@ -290,6 +300,9 @@ class _ReaderGestureDetectorState extends State<_ReaderGestureDetector> {
   void removeDragListener(_DragListener listener) {
     _dragListeners.remove(listener);
   }
+
+  @override
+  Object? get key => "reader_gesture";
 }
 
 class _DragListener {

lib/pages/reader/reader.dart

@@ -22,6 +22,7 @@ import 'package:venera/foundation/comic_source/comic_source.dart';
 import 'package:venera/foundation/comic_type.dart';
 import 'package:venera/foundation/consts.dart';
 import 'package:venera/foundation/favorites.dart';
+import 'package:venera/foundation/global_state.dart';
 import 'package:venera/foundation/history.dart';
 import 'package:venera/foundation/image_provider/reader_image.dart';
 import 'package:venera/foundation/local.dart';