Improve sharing image & saving image

assets/translation.json

@@ -205,7 +205,8 @@
     "Finished": "已完成",
     "Updating": "更新中",
     "Update Comics Info": "更新漫画信息",
-    "Create Folder": "新建文件夹"
+    "Create Folder": "新建文件夹",
+    "Select an image on screen": "选择屏幕上的图片"
   },
   "zh_TW": {
     "Home": "首頁",
@@ -413,6 +414,7 @@
     "Finished": "已完成",
     "Updating": "更新中",
     "Update Comics Info": "更新漫畫信息",
-    "Create Folder": "新建文件夾"
+    "Create Folder": "新建文件夾",
+    "Select an image on screen": "選擇屏幕上的圖片"
   }
 }

lib/pages/reader/reader.dart

@@ -324,6 +324,8 @@ enum ReaderMode {
 
   bool get isGallery => key.startsWith('gallery');
 
+  bool get isContinuous => key.startsWith('continuous');
+
   const ReaderMode(this.key);
 
   static ReaderMode fromKey(String key) {

lib/pages/reader/scaffold.dart

@@ -451,8 +451,73 @@ class _ReaderScaffoldState extends State<_ReaderScaffold> {
     );
   }
 
-  Future<Uint8List> _getCurrentImageData() async {
+  Future<Uint8List?> _getCurrentImageData() async {
     var imageKey = context.reader.images![context.reader.page - 1];
+    var reader = context.reader;
+    if (context.reader.mode.isContinuous) {
+      var continuesState =
+          context.reader._imageViewController as _ContinuousModeState;
+      var imagesOnScreen =
+          continuesState.itemPositionsListener.itemPositions.value;
+      var images = imagesOnScreen
+          .map((e) => context.reader.images![e.index - 1])
+          .toList();
+      String? selected;
+      await showPopUpWidget(
+        context,
+        PopUpWidgetScaffold(
+          title: "Select an image on screen".tl,
+          body: GridView.builder(
+            itemCount: images.length,
+            itemBuilder: (context, index) {
+              ImageProvider image;
+              var imageKey = images[index];
+              if (imageKey.startsWith('file://')) {
+                image = FileImage(File(imageKey.replaceFirst("file://", '')));
+              } else {
+                image = ReaderImageProvider(
+                  imageKey,
+                  reader.type.comicSource!.key,
+                  reader.cid,
+                  reader.eid,
+                );
+              }
+              return InkWell(
+                borderRadius: const BorderRadius.all(Radius.circular(16)),
+                onTap: () {
+                  selected = images[index];
+                  App.rootContext.pop();
+                },
+                child: Container(
+                  decoration: BoxDecoration(
+                    borderRadius: const BorderRadius.all(Radius.circular(16)),
+                    border: Border.all(
+                      color: Theme.of(context).colorScheme.outline,
+                    ),
+                  ),
+                  width: double.infinity,
+                  height: double.infinity,
+                  child: Image(
+                    width: double.infinity,
+                    height: double.infinity,
+                    image: image,
+                  ),
+                ),
+              ).padding(const EdgeInsets.all(8));
+            },
+            gridDelegate: const SliverGridDelegateWithMaxCrossAxisExtent(
+              maxCrossAxisExtent: 200,
+              childAspectRatio: 0.7,
+            ),
+          ),
+        ),
+      );
+      if (selected == null) {
+        return null;
+      } else {
+        imageKey = selected!;
+      }
+    }
     if (imageKey.startsWith("file://")) {
       return await File(imageKey.substring(7)).readAsBytes();
     } else {
@@ -464,6 +529,9 @@ class _ReaderScaffoldState extends State<_ReaderScaffold> {
 
   void saveCurrentImage() async {
     var data = await _getCurrentImageData();
+    if (data == null) {
+      return;
+    }
     var fileType = detectFileType(data);
     var filename = "${context.reader.page}${fileType.ext}";
     saveFile(data: data, filename: filename);
@@ -471,6 +539,9 @@ class _ReaderScaffoldState extends State<_ReaderScaffold> {
 
   void share() async {
     var data = await _getCurrentImageData();
+    if (data == null) {
+      return;
+    }
     var fileType = detectFileType(data);
     var filename = "${context.reader.page}${fileType.ext}";
     Share.shareFile(
@@ -614,7 +685,8 @@ class _BatteryWidgetState extends State<_BatteryWidget> {
           _hasBattery = true;
           _timer = Timer.periodic(const Duration(seconds: 1), (timer) {
             _battery.batteryLevel.then((level) => {
-              if(_batteryLevel != level) {
+                  if (_batteryLevel != level)
+                    {
                       setState(() {
                         _batteryLevel = level;
                       })
@@ -680,7 +752,8 @@ class _BatteryWidgetState extends State<_BatteryWidget> {
           size: 16,
           color: batteryColor,
           // Stroke
-          shadows: List.generate(9,
+          shadows: List.generate(
+            9,
             (index) {
               if (index == 4) {
                 return null;