fix cbz import

Signed-off-by: Naomi <33375791+Henvy-Mango@users.noreply.github.com>

.github/workflows/main.yml

@@ -2,6 +2,9 @@ name: Build ALL
 run-name: Build ALL
 on:
   workflow_dispatch: {}
+  release:
+    types: [published]
+
 jobs:
   Build_MacOS:
     runs-on: macos-15
@@ -139,3 +142,45 @@ jobs:
           name: arch_build
           path: build/linux/arch/
 
+  Release:
+    runs-on: ubuntu-latest
+    needs: [Build_MacOS, Build_IOS, Build_Android, Build_Windows, Build_Linux]
+    if: github.event_name == 'release'  # 仅在 push 事件时执行
+    steps:
+      - uses: actions/download-artifact@v4
+        with:
+          name: venera.dmg
+          path: outputs
+      - uses: actions/download-artifact@v4
+        with:
+          name: app-ios.ipa
+          path: outputs
+      - uses: actions/download-artifact@v4
+        with:
+          name: apks
+          path: outputs
+      - uses: actions/download-artifact@v4
+        with:
+          name: windows_build
+          path: outputs
+      - uses: actions/download-artifact@v4
+        with:
+          name: deb_build
+          path: outputs
+      - uses: actions/download-artifact@v4
+        with:
+          name: arch_build
+          path: outputs
+      - uses: softprops/action-gh-release@v2
+        with:
+          tag_name: ${{ github.ref_name }}
+          files: |
+            outputs/*.ipa
+            outputs/*.dmg
+            outputs/*.apk
+            outputs/*.zip
+            outputs/*.exe
+            outputs/*.deb
+            outputs/*.zst
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

android/app/src/main/kotlin/com/github/wgh136/venera/MainActivity.kt

@@ -9,6 +9,7 @@ import android.net.Uri
 import android.os.Build
 import android.os.Environment
 import android.provider.Settings
+import android.util.Log
 import android.view.KeyEvent
 import androidx.activity.result.ActivityResultCallback
 import androidx.activity.result.ActivityResultLauncher
@@ -324,8 +325,25 @@ class MainActivity : FlutterFragmentActivity() {
                 }
             }
             // use copy method
-            val filePath = FileUtils.getPathFromCopyOfFileFromUri(this, uri)
+            val tmp = File(cacheDir, fileName)
-            result.success(filePath)
+            if(tmp.exists()) {
+                tmp.delete()
+            }
+            Log.i("Venera", "copy file (${fileName}) to ${tmp.absolutePath}")
+            Thread {
+                try {
+                    contentResolver.openInputStream(uri)?.use { input ->
+                        FileOutputStream(tmp).use { output ->
+                            input.copyTo(output, bufferSize = DEFAULT_BUFFER_SIZE)
+                            output.flush()
+                        }
+                    }
+                    result.success(tmp.absolutePath)
+                }
+                catch (e: Exception) {
+                    result.error("copy error", e.message, null)
+                }
+            }.start()
         }
     }
 }

assets/init.js

@@ -877,6 +877,8 @@ function Comic({id, title, subtitle, subTitle, cover, tags, description, maxPage
 /**
  * Create a comic details object
  * @param title {string}
+ * @param subtitle {string}
+ * @param subTitle {string} - equal to subtitle
  * @param cover {string}
  * @param description {string?}
  * @param tags {Map<string, string[]> | {} | null | undefined}
@@ -897,8 +899,9 @@ function Comic({id, title, subtitle, subTitle, cover, tags, description, maxPage
  * @param comments {Comment[]?}- `since 1.0.7` App will display comments in the details page.
  * @constructor
  */
-function ComicDetails({title, cover, description, tags, chapters, isFavorite, subId, thumbnails, recommend, commentCount, likesCount, isLiked, uploader, updateTime, uploadTime, url, stars, maxPage, comments}) {
+function ComicDetails({title, subtitle, subTitle, cover, description, tags, chapters, isFavorite, subId, thumbnails, recommend, commentCount, likesCount, isLiked, uploader, updateTime, uploadTime, url, stars, maxPage, comments}) {
     this.title = title;
+    this.subtitle = subtitle ?? subTitle;
     this.cover = cover;
     this.description = description;
     this.tags = tags;

assets/translation.json

@@ -105,6 +105,7 @@
     "Continuous (Right to Left)": "连续（从右到左）",
     "Continuous (Top to Bottom)": "连续（从上到下）",
     "Auto page turning interval": "自动翻页间隔",
+    "The number of pic in screen (Only Gallery Mode)": "同屏幕图片数量(仅画廊模式)",
     "Theme Mode": "主题模式",
     "System": "系统",
     "Light": "浅色",
@@ -152,7 +153,7 @@
     "If the directory contains a file named 'cover.*', it will be used as the cover image. Otherwise the first image will be used." : "如果目录包含一个名为'cover.*'的文件，它将被用作封面图片。否则将使用第一张图片。",
     "The directory name will be used as the comic title. And the name of chapter directories will be used as the chapter titles.\n" : "目录名称将被用作漫画标题。章节目录的名称将被用作章节标题。\n",
     "Export as cbz": "导出为cbz",
-    "Select a cbz file." : "选择一个cbz文件",
+    "Select a cbz/zip file." : "选择一个cbz/zip文件",
     "A cbz file" : "一个cbz文件",
     "Fullscreen": "全屏",
     "Exit": "退出",
@@ -244,7 +245,8 @@
     "Deleted @a favorite items.": "已删除 @a 条无效收藏",
     "New version available": "有新版本可用",
     "A new version is available. Do you want to update now?" : "有新版本可用。您要现在更新吗？",
-    "No new version available": "没有新版本可用"
+    "No new version available": "没有新版本可用",
+    "Export as pdf": "导出为pdf"
   },
   "zh_TW": {
     "Home": "首頁",
@@ -352,6 +354,7 @@
     "Continuous (Right to Left)": "連續（從右到左）",
     "Continuous (Top to Bottom)": "連續（從上到下）",
     "Auto page turning interval": "自動翻頁間隔",
+    "The number of pic in screen (Only Gallery Mode)": "同螢幕圖片數量(僅畫廊模式)",
     "Theme Mode": "主題模式",
     "System": "系統",
     "Light": "浅色",
@@ -399,7 +402,7 @@
     "If the directory contains a file named 'cover.*', it will be used as the cover image. Otherwise the first image will be used." : "如果目錄包含一個名為'cover.*'的文件，它將被用作封面圖片。否則將使用第一張圖片。",
     "The directory name will be used as the comic title. And the name of chapter directories will be used as the chapter titles.\n" : "目錄名稱將被用作漫畫標題。章節目錄的名稱將被用作章節標題。\n",
     "Export as cbz": "匯出為cbz",
-    "Select a cbz file." : "選擇一個cbz文件",
+    "Select a cbz/zip file." : "選擇一個cbz/zip文件",
     "A cbz file" : "一個cbz文件",
     "Fullscreen": "全螢幕",
     "Exit": "退出",
@@ -491,6 +494,7 @@
     "Deleted @a favorite items.": "已刪除 @a 條無效收藏",
     "New version available": "有新版本可用",
     "A new version is available. Do you want to update now?" : "有新版本可用。您要現在更新嗎？",
-    "No new version available": "沒有新版本可用"
+    "No new version available": "沒有新版本可用",
+    "Export as pdf": "匯出為pdf"
   }
 }

lib/components/appbar.dart

@@ -332,7 +332,7 @@ class _FilledTabBarState extends State<FilledTabBar> {
   @override
   Widget build(BuildContext context) {
     return AnimatedBuilder(
-      animation: _controller,
+      animation: _controller.animation ?? _controller,
       builder: buildTabBar,
     );
   }
@@ -427,7 +427,7 @@ class _FilledTabBarState extends State<FilledTabBar> {
           padding: const EdgeInsets.symmetric(horizontal: 16),
           child: DefaultTextStyle(
             style: DefaultTextStyle.of(context).style.copyWith(
-                  color: i == _controller.index
+                  color: i == _controller.animation?.value.round()
                       ? context.colorScheme.primary
                       : context.colorScheme.onSurface,
                   fontWeight: FontWeight.w500,

lib/components/comic.dart

@@ -163,7 +163,9 @@ class ComicTile extends StatelessWidget {
   Widget buildImage(BuildContext context) {
     ImageProvider image;
     if (comic is LocalComic) {
-      image = FileImage((comic as LocalComic).coverFile);
+      image = LocalComicImageProvider(comic as LocalComic);
+    } else if (comic is History) {
+      image = HistoryImageProvider(comic as History);
     } else if (comic.sourceKey == 'local') {
       var localComic = LocalManager().find(comic.id, ComicType.local);
       if (localComic == null) {
@@ -829,6 +831,7 @@ class ComicList extends StatefulWidget {
     this.trailingSliver,
     this.errorLeading,
     this.menuBuilder,
+    this.controller,
   });
 
   final Future<Res<List<Comic>>> Function(int page)? loadPage;
@@ -843,6 +846,8 @@ class ComicList extends StatefulWidget {
 
   final List<MenuEntry> Function(Comic)? menuBuilder;
 
+  final ScrollController? controller;
+
   @override
   State<ComicList> createState() => ComicListState();
 }
@@ -1064,6 +1069,7 @@ class ComicListState extends State<ComicList> {
       );
     }
     return SmoothCustomScrollView(
+      controller: widget.controller,
       slivers: [
         if (widget.leadingSliver != null) widget.leadingSliver!,
         if (_maxPage != 1) _buildSliverPageSelector(),

lib/components/components.dart

@@ -19,13 +19,14 @@ import 'package:venera/foundation/consts.dart';
 import 'package:venera/foundation/favorites.dart';
 import 'package:venera/foundation/history.dart';
 import 'package:venera/foundation/image_provider/cached_image.dart';
+import 'package:venera/foundation/image_provider/history_image_provider.dart';
+import 'package:venera/foundation/image_provider/local_comic_image.dart';
 import 'package:venera/foundation/local.dart';
 import 'package:venera/foundation/res.dart';
 import 'package:venera/network/cloudflare.dart';
 import 'package:venera/pages/comic_page.dart';
 import 'package:venera/pages/favorites/favorites_page.dart';
 import 'package:venera/utils/ext.dart';
-import 'package:venera/utils/io.dart';
 import 'package:venera/utils/tags_translation.dart';
 import 'package:venera/utils/translations.dart';
 

lib/components/navigation_bar.dart

@@ -47,10 +47,16 @@ class NaviPane extends StatefulWidget {
   final GlobalKey<NavigatorState> navigatorKey;
 
   @override
-  State<NaviPane> createState() => _NaviPaneState();
+  State<NaviPane> createState() => NaviPaneState();
+
+  static NaviPaneState of(BuildContext context) {
+    return context.findAncestorStateOfType<NaviPaneState>()!;
+  }
 }
 
-class _NaviPaneState extends State<NaviPane>
+typedef NaviItemTapListener = void Function(int);
+
+class NaviPaneState extends State<NaviPane>
     with SingleTickerProviderStateMixin {
   late int _currentPage = widget.initialPage;
 
@@ -66,6 +72,16 @@ class _NaviPaneState extends State<NaviPane>
 
   late AnimationController controller;
 
+  final _naviItemTapListeners = <NaviItemTapListener>[];
+
+  void addNaviItemTapListener(NaviItemTapListener listener) {
+    _naviItemTapListeners.add(listener);
+  }
+
+  void removeNaviItemTapListener(NaviItemTapListener listener) {
+    _naviItemTapListeners.remove(listener);
+  }
+
   static const _kBottomBarHeight = 58.0;
 
   static const _kFoldedSideBarWidth = 80.0;
@@ -85,9 +101,15 @@ class _NaviPaneState extends State<NaviPane>
   }
 
   void updatePage(int index) {
+    for (var listener in _naviItemTapListeners) {
+      listener(index);
+    }
     if (widget.observer.routes.length > 1) {
       widget.navigatorKey.currentState!.popUntil((route) => route.isFirst);
     }
+    if (currentPage == index) {
+      return;
+    }
     setState(() {
       currentPage = index;
     });
@@ -670,14 +692,14 @@ class _NaviPopScope extends StatelessWidget {
 class _NaviMainView extends StatefulWidget {
   const _NaviMainView({required this.state});
 
-  final _NaviPaneState state;
+  final NaviPaneState state;
 
   @override
   State<_NaviMainView> createState() => _NaviMainViewState();
 }
 
 class _NaviMainViewState extends State<_NaviMainView> {
-  _NaviPaneState get state => widget.state;
+  NaviPaneState get state => widget.state;
 
   @override
   void initState() {

lib/foundation/app.dart

@@ -10,7 +10,7 @@ export "widget_utils.dart";
 export "context.dart";
 
 class _App {
-  final version = "1.0.7";
+  final version = "1.0.8";
 
   bool get isAndroid => Platform.isAndroid;
 

lib/foundation/appdata.dart

@@ -106,6 +106,7 @@ class _Settings with ChangeNotifier {
     'defaultSearchTarget': null,
     'autoPageTurningInterval': 5, // in seconds
     'readerMode': 'galleryLeftToRight', // values of [ReaderMode]
+    'readerScreenPicNumber': 1, // 1 - 5
     'enableTapToTurnPages': true,
     'enablePageAnimation': true,
     'language': 'system', // system, zh-CN, zh-TW, en-US

lib/foundation/comic_source/models.dart

@@ -172,7 +172,7 @@ class ComicDetails with HistoryMixin {
 
   ComicDetails.fromJson(Map<String, dynamic> json)
       : title = json["title"],
-        subTitle = json["subTitle"],
+        subTitle = json["subtitle"],
         cover = json["cover"],
         description = json["description"],
         tags = _generateMap(json["tags"]),
@@ -198,7 +198,9 @@ class ComicDetails with HistoryMixin {
         maxPage = json["maxPage"],
         comments = (json["comments"] as List?)
             ?.map((e) => Comment.fromJson(e))
-            .toList();
+            .toList(){
+    print(json);
+  }
 
   Map<String, dynamic> toJson() {
     return {

lib/foundation/history.dart

@@ -2,7 +2,9 @@ import 'dart:async';
 
 import 'package:flutter/widgets.dart' show ChangeNotifier;
 import 'package:sqlite3/sqlite3.dart';
+import 'package:venera/foundation/comic_source/comic_source.dart';
 import 'package:venera/foundation/comic_type.dart';
+import 'package:venera/utils/translations.dart';
 
 import 'app.dart';
 
@@ -22,15 +24,18 @@ abstract mixin class HistoryMixin {
   HistoryType get historyType;
 }
 
-class History {
+class History implements Comic {
   HistoryType type;
 
   DateTime time;
 
+  @override
   String title;
 
+  @override
   String subtitle;
 
+  @override
   String cover;
   
   int ep;
@@ -44,6 +49,7 @@ class History {
   /// The number of episodes is 1-based.
   Set<int> readEpisode;
 
+  @override
   int? maxPage;
 
   History.fromModel(
@@ -137,6 +143,47 @@ class History {
 
   @override
   int get hashCode => Object.hash(id, type);
+
+  @override
+  String get description {
+    var res = "";
+    if (ep >= 1) {
+      res += "Chapter @ep".tlParams({
+        "ep": ep,
+      });
+    }
+    if (page >= 1) {
+      if (ep >= 1) {
+        res += " - ";
+      }
+      res += "Page @page".tlParams({
+        "page": page,
+      });
+    }
+    return res;
+  }
+
+  @override
+  String? get favoriteId => null;
+
+  @override
+  String? get language => null;
+
+  @override
+  String get sourceKey => type == ComicType.local
+      ? 'local'
+      : type.comicSource?.key ?? "Unknown:${type.value}";
+
+  @override
+  double? get stars => null;
+
+  @override
+  List<String>? get tags => null;
+
+  @override
+  Map<String, dynamic> toJson() {
+    throw UnimplementedError();
+  }
 }
 
 class HistoryManager with ChangeNotifier {

lib/foundation/image_provider/base_image_provider.dart

@@ -1,5 +1,4 @@
 import 'dart:async' show Future, StreamController, scheduleMicrotask;
-import 'dart:collection';
 import 'dart:convert';
 import 'dart:ui' as ui show Codec;
 import 'dart:ui';
@@ -108,7 +107,7 @@ abstract class BaseImageProvider<T extends BaseImageProvider<T>>
     }
   }
 
-  static final _cache = LinkedHashMap<String, Uint8List>();
+  static final _cache = <String, Uint8List>{};
 
   static var _cacheSize = 0;
 

lib/foundation/image_provider/cached_image.dart

@@ -1,5 +1,4 @@
 import 'dart:async' show Future, StreamController;
-import 'dart:io';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:venera/network/images.dart';
@@ -22,10 +21,19 @@ class CachedImageProvider
 
   final String? cid;
 
+  static int loadingCount = 0;
+
+  static const _kMaxLoadingCount = 8;
+
   @override
   Future<Uint8List> load(StreamController<ImageChunkEvent> chunkEvents) async {
+    while(loadingCount > _kMaxLoadingCount) {
+      await Future.delayed(const Duration(milliseconds: 100));
+    }
+    loadingCount++;
+    try {
       if(url.startsWith("file://")) {
-      var file = openFilePlatform(url.substring(7));
+        var file = File(url.substring(7));
         return file.readAsBytes();
       }
       await for (var progress in ImageDownloader.loadThumbnail(url, sourceKey, cid)) {
@@ -39,6 +47,10 @@ class CachedImageProvider
       }
       throw "Error: Empty response body.";
     }
+    finally {
+      loadingCount--;
+    }
+  }
 
   @override
   Future<CachedImageProvider> obtainKey(ImageConfiguration configuration) {

lib/foundation/image_provider/history_image_provider.dart

@@ -0,0 +1,57 @@
+import 'dart:async' show Future, StreamController;
+import 'package:flutter/foundation.dart';
+import 'package:flutter/material.dart';
+import 'package:venera/foundation/local.dart';
+import 'package:venera/network/images.dart';
+import '../history.dart';
+import 'base_image_provider.dart';
+import 'history_image_provider.dart' as image_provider;
+
+class HistoryImageProvider
+    extends BaseImageProvider<image_provider.HistoryImageProvider> {
+  /// Image provider for normal image.
+  ///
+  /// [url] is the url of the image. Local file path is also supported.
+  const HistoryImageProvider(this.history);
+
+  final History history;
+
+  @override
+  Future<Uint8List> load(StreamController<ImageChunkEvent> chunkEvents) async {
+    var url = history.cover;
+    if (!url.contains('/')) {
+      var localComic = LocalManager().find(history.id, history.type);
+      if (localComic != null) {
+        return localComic.coverFile.readAsBytes();
+      }
+      var comicSource =
+          history.type.comicSource ?? (throw "Comic source not found.");
+      var comic = await comicSource.loadComicInfo!(history.id);
+      url = comic.data.cover;
+      history.cover = url;
+      HistoryManager().addHistory(history);
+    }
+    await for (var progress in ImageDownloader.loadThumbnail(
+      url,
+      history.type.sourceKey,
+      history.id,
+    )) {
+      chunkEvents.add(ImageChunkEvent(
+        cumulativeBytesLoaded: progress.currentBytes,
+        expectedTotalBytes: progress.totalBytes,
+      ));
+      if (progress.imageBytes != null) {
+        return progress.imageBytes!;
+      }
+    }
+    throw "Error: Empty response body.";
+  }
+
+  @override
+  Future<HistoryImageProvider> obtainKey(ImageConfiguration configuration) {
+    return SynchronousFuture(this);
+  }
+
+  @override
+  String get key => "history${history.id}${history.type.value}";
+}

lib/foundation/image_provider/local_comic_image.dart

@@ -0,0 +1,66 @@
+import 'dart:async' show Future, StreamController;
+import 'package:flutter/foundation.dart';
+import 'package:flutter/material.dart';
+import 'package:venera/foundation/local.dart';
+import 'package:venera/utils/io.dart';
+import 'base_image_provider.dart';
+import 'local_comic_image.dart' as image_provider;
+
+class LocalComicImageProvider
+    extends BaseImageProvider<image_provider.LocalComicImageProvider> {
+  /// Image provider for normal image.
+  ///
+  /// [url] is the url of the image. Local file path is also supported.
+  const LocalComicImageProvider(this.comic);
+
+  final LocalComic comic;
+
+  @override
+  Future<Uint8List> load(StreamController<ImageChunkEvent> chunkEvents) async {
+    File? file = comic.coverFile;
+    if(! await file.exists()) {
+      file = null;
+      var dir = Directory(comic.directory);
+      if (! await dir.exists()) {
+        throw "Error: Comic not found.";
+      }
+      Directory? firstDir;
+      await for (var entity in dir.list()) {
+        if(entity is File) {
+          if(["jpg", "jpeg", "png", "webp", "gif", "jpe", "jpeg"].contains(entity.extension)) {
+            file = entity;
+            break;
+          }
+        } else if(entity is Directory) {
+          firstDir ??= entity;
+        }
+      }
+      if(file == null && firstDir != null) {
+        await for (var entity in firstDir.list()) {
+          if(entity is File) {
+            if(["jpg", "jpeg", "png", "webp", "gif", "jpe", "jpeg"].contains(entity.extension)) {
+              file = entity;
+              break;
+            }
+          }
+        }
+      }
+    }
+    if(file == null) {
+      throw "Error: Cover not found.";
+    }
+    var data = await file.readAsBytes();
+    if(data.isEmpty) {
+      throw "Exception: Empty file(${file.path}).";
+    }
+    return data;
+  }
+
+  @override
+  Future<LocalComicImageProvider> obtainKey(ImageConfiguration configuration) {
+    return SynchronousFuture(this);
+  }
+
+  @override
+  String get key => "local${comic.id}${comic.comicType.value}";
+}

lib/foundation/local.dart

@@ -71,12 +71,12 @@ class LocalComic with HistoryMixin implements Comic {
         downloadedChapters = List.from(jsonDecode(row[8] as String)),
         createdAt = DateTime.fromMillisecondsSinceEpoch(row[9] as int);
 
-  File get coverFile => openFilePlatform(FilePath.join(
+  File get coverFile => File(FilePath.join(
         baseDir,
         cover,
       ));
 
-  String get baseDir => directory.contains("/") ? directory : FilePath.join(LocalManager().path, directory);
+  String get baseDir => (directory.contains('/') || directory.contains('\\')) ? directory : FilePath.join(LocalManager().path, directory);
 
   @override
   String get description => "";
@@ -151,6 +151,8 @@ class LocalManager with ChangeNotifier {
   /// path to the directory where all the comics are stored
   late String path;
 
+  Directory get directory => Directory(path);
+
   // return error message if failed
   Future<String?> setNewPath(String newPath) async {
     var newDir = Directory(newPath);
@@ -162,7 +164,7 @@ class LocalManager with ChangeNotifier {
     }
     try {
       await copyDirectoryIsolate(
-        Directory(path),
+        directory,
         newDir,
       );
       await File(FilePath.join(App.dataPath, 'local_path')).writeAsString(newPath);
@@ -170,7 +172,7 @@ class LocalManager with ChangeNotifier {
       Log.error("IO", e, s);
       return e.toString();
     }
-    await Directory(path).deleteIgnoreError(recursive:true);
+    await directory.deleteContents(recursive: true);
     path = newPath;
     return null;
   }
@@ -217,15 +219,15 @@ class LocalManager with ChangeNotifier {
     ''');
     if (File(FilePath.join(App.dataPath, 'local_path')).existsSync()) {
       path = File(FilePath.join(App.dataPath, 'local_path')).readAsStringSync();
-      if (!Directory(path).existsSync()) {
+      if (!directory.existsSync()) {
         path = await findDefaultPath();
       }
     } else {
       path = await findDefaultPath();
     }
     try {
-      if (!Directory(path).existsSync()) {
+      if (!directory.existsSync()) {
-        await Directory(path).create();
+        await directory.create();
       }
     }
     catch(e, s) {
@@ -354,12 +356,12 @@ class LocalManager with ChangeNotifier {
       throw "Invalid ep";
     }
     var comic = find(id, type) ?? (throw "Comic Not Found");
-    var directory = openDirectoryPlatform(comic.baseDir);
+    var directory = Directory(comic.baseDir);
     if (comic.chapters != null) {
       var cid = ep is int
           ? comic.chapters!.keys.elementAt(ep - 1)
           : (ep as String);
-      directory = openDirectoryPlatform(FilePath.join(directory.path, cid));
+      directory = Directory(FilePath.join(directory.path, cid));
     }
     var files = <File>[];
     await for (var entity in directory.list()) {
@@ -406,10 +408,10 @@ class LocalManager with ChangeNotifier {
       String id, ComicType type, String name) async {
     var comic = find(id, type);
     if (comic != null) {
-      return openDirectoryPlatform(FilePath.join(path, comic.directory));
+      return Directory(FilePath.join(path, comic.directory));
     }
     var dir = findValidDirectoryName(path, name);
-    return openDirectoryPlatform(FilePath.join(path, dir)).create().then((value) => value);
+    return Directory(FilePath.join(path, dir)).create().then((value) => value);
   }
 
   void completeTask(DownloadTask task) {
@@ -468,7 +470,7 @@ class LocalManager with ChangeNotifier {
 
   void deleteComic(LocalComic c, [bool removeFileOnDisk = true]) {
     if(removeFileOnDisk) {
-      var dir = openDirectoryPlatform(FilePath.join(path, c.directory));
+      var dir = Directory(FilePath.join(path, c.directory));
       dir.deleteIgnoreError(recursive: true);
     }
     //Deleting a local comic means that it's nolonger available, thus both favorite and history should be deleted.

lib/foundation/state_controller.dart

@@ -1,14 +1,18 @@
 import 'package:flutter/material.dart';
 
 class SimpleController extends StateController {
-  final void Function()? refresh_;
+  final void Function()? refreshFunction;
 
-  SimpleController({this.refresh_});
+  final Map<String, dynamic> Function()? control;
+
+  SimpleController({this.refreshFunction, this.control});
 
   @override
   void refresh() {
-    (refresh_ ?? super.refresh)();
+    (refreshFunction ?? super.refresh)();
   }
+
+  Map<String, dynamic> get controlMap => control?.call() ?? {};
 }
 
 abstract class StateController {
@@ -71,8 +75,8 @@ abstract class StateController {
 
   static SimpleController putSimpleController(
       void Function() onUpdate, Object? tag,
-      {void Function()? refresh}) {
+      {void Function()? refresh, Map<String, dynamic> Function()? control}) {
-    var controller = SimpleController(refresh_: refresh);
+    var controller = SimpleController(refreshFunction: refresh, control: control);
     controller.stateUpdaters.add(Pair(null, onUpdate));
     _controllers.add(StateControllerWrapped(controller, false, tag));
     return controller;
@@ -202,6 +206,7 @@ abstract class StateWithController<T extends StatefulWidget> extends State<T> {
       },
       tag,
       refresh: refresh,
+      control: () => control,
     );
     super.initState();
   }
@@ -218,6 +223,8 @@ abstract class StateWithController<T extends StatefulWidget> extends State<T> {
   }
 
   Object? get tag;
+
+  Map<String, dynamic> get control => {};
 }
 
 class Pair<M, V>{

lib/main.dart

@@ -20,6 +20,7 @@ void main(List<String> args) {
   if (runWebViewTitleBarWidget(args)) {
     return;
   }
+  overrideIO(() {
     runZonedGuarded(() async {
       await Rhttp.init();
       WidgetsFlutterBinding.ensureInitialized();
@@ -55,6 +56,7 @@ void main(List<String> args) {
     }, (error, stack) {
       Log.error("Unhandled Exception", "$error\n$stack");
     });
+  });
 }
 
 class MyApp extends StatefulWidget {

lib/network/download.dart

@@ -235,21 +235,22 @@ class ImagesDownloadTask extends DownloadTask with _TransferSpeedMixin {
     }
 
     if (path == null) {
+      try {
         var dir = await LocalManager().findValidDirectory(
           comicId,
           comicType,
           comic!.title,
         );
         if (!(await dir.exists())) {
-        try {
           await dir.create();
-        } catch (e) {
+        }
+        path = dir.path;
+      } catch (e, s) {
+        Log.error("Download", e.toString(), s);
         _setError("Error: $e");
         return;
       }
     }
-      path = dir.path;
-    }
 
     await LocalManager().saveCurrentDownloadingTasks();
 
@@ -266,11 +267,13 @@ class ImagesDownloadTask extends DownloadTask with _TransferSpeedMixin {
           throw "Failed to download cover";
         }
         var fileType = detectFileType(data);
-        var file = File(FilePath.join(path!, "cover${fileType.ext}"));
+        var file =
+            File(FilePath.join(path!, "cover${fileType.ext}"));
         file.writeAsBytesSync(data);
         return "file://${file.path}";
       });
       if (res.error) {
+        Log.error("Download", res.errorMessage!);
         _setError("Error: ${res.errorMessage}");
         return;
       } else {
@@ -294,6 +297,7 @@ class ImagesDownloadTask extends DownloadTask with _TransferSpeedMixin {
           return;
         }
         if (res.error) {
+          Log.error("Download", res.errorMessage!);
           _setError("Error: ${res.errorMessage}");
           return;
         } else {
@@ -323,6 +327,7 @@ class ImagesDownloadTask extends DownloadTask with _TransferSpeedMixin {
             return;
           }
           if (res.error) {
+            Log.error("Download", res.errorMessage!);
             _setError("Error: ${res.errorMessage}");
             return;
           } else {
@@ -347,6 +352,7 @@ class ImagesDownloadTask extends DownloadTask with _TransferSpeedMixin {
           return;
         }
         if (task.error != null) {
+          Log.error("Download", task.error.toString());
           _setError("Error: ${task.error}");
           return;
         }
@@ -375,7 +381,6 @@ class ImagesDownloadTask extends DownloadTask with _TransferSpeedMixin {
     _message = message;
     notifyListeners();
     stopRecorder();
-    Log.error("Download", message);
   }
 
   @override
@@ -448,7 +453,8 @@ class ImagesDownloadTask extends DownloadTask with _TransferSpeedMixin {
       }).toList(),
       directory: Directory(path!).name,
       chapters: comic!.chapters,
-      cover: File(_cover!.split("file://").last).uri.pathSegments.last,
+      cover:
+          File(_cover!.split("file://").last).name,
       comicType: ComicType(source.key.hashCode),
       downloadedChapters: chapters ?? [],
       createdAt: DateTime.now(),
@@ -726,8 +732,7 @@ class ArchiveDownloadTask extends DownloadTask {
         isDownloaded = status.isFinished;
         notifyListeners();
       }
-    }
+    } catch (e) {
-    catch(e) {
       _setError("Error: $e");
       return;
     }

lib/pages/comic_page.dart

@@ -223,7 +223,7 @@ class _ComicPageState extends LoadingState<ComicPage, ComicDetails>
             children: [
               SelectableText(comic.title, style: ts.s18),
               if (comic.subTitle != null)
-                SelectableText(comic.subTitle!, style: ts.s14),
+                SelectableText(comic.subTitle!, style: ts.s14).paddingVertical(4),
               Text(
                 (ComicSource.find(comic.sourceKey)?.name) ?? '',
                 style: ts.s12,
@@ -288,8 +288,7 @@ class _ComicPageState extends LoadingState<ComicPage, ComicDetails>
                 onLongPressed: quickFavorite,
                 iconColor: context.useTextColor(Colors.purple),
               ),
-              if (comicSource.commentsLoader != null &&
+              if (comicSource.commentsLoader != null)
-                  (comic.comments == null || comic.comments!.isEmpty))
                 _ActionButton(
                   icon: const Icon(Icons.comment),
                   text: (comic.commentsCount ?? 'Comments'.tl).toString(),

lib/pages/explore_page.dart

@@ -46,6 +46,18 @@ class _ExplorePageState extends State<ExplorePage>
     }
   }
 
+  void onNaviItemTapped(int index) {
+    if (index == 2) {
+      int page = controller.index;
+      String currentPageId = pages[page];
+      StateController.find<SimpleController>(tag: currentPageId)
+          .control!()['toTop']
+          ?.call();
+    }
+  }
+
+  NaviPaneState? naviPane;
+
   @override
   void initState() {
     pages = List<String>.from(appdata.settings["explore_pages"]);
@@ -59,13 +71,21 @@ class _ExplorePageState extends State<ExplorePage>
       vsync: this,
     );
     appdata.settings.addListener(onSettingsChanged);
+    NaviPane.of(context).addNaviItemTapListener(onNaviItemTapped);
     super.initState();
   }
 
+  @override
+  void didChangeDependencies() {
+    naviPane = NaviPane.of(context);
+    super.didChangeDependencies();
+  }
+
   @override
   void dispose() {
     controller.dispose();
     appdata.settings.removeListener(onSettingsChanged);
+    naviPane?.removeNaviItemTapListener(onNaviItemTapped);
     super.dispose();
   }
 
@@ -232,6 +252,8 @@ class _SingleExplorePageState extends StateWithController<_SingleExplorePage>
 
   bool _wantKeepAlive = true;
 
+  var scrollController = ScrollController();
+
   void onSettingsChanged() {
     var explorePages = appdata.settings["explore_pages"];
     if (!explorePages.contains(widget.title)) {
@@ -274,6 +296,7 @@ class _SingleExplorePageState extends StateWithController<_SingleExplorePage>
         data,
         comicSourceKey,
         key: ValueKey(key),
+        controller: scrollController,
       );
     } else {
       return const Center(
@@ -287,6 +310,7 @@ class _SingleExplorePageState extends StateWithController<_SingleExplorePage>
       loadPage: data.loadPage,
       loadNext: data.loadNext,
       key: ValueKey(key),
+      controller: scrollController,
     );
   }
 
@@ -323,6 +347,7 @@ class _SingleExplorePageState extends StateWithController<_SingleExplorePage>
 
   Widget buildPage() {
     return SmoothCustomScrollView(
+      controller: scrollController,
       slivers: _buildPage().toList(),
     );
   }
@@ -352,15 +377,30 @@ class _SingleExplorePageState extends StateWithController<_SingleExplorePage>
 
   @override
   bool get wantKeepAlive => _wantKeepAlive;
+
+  void toTop() {
+    if (scrollController.hasClients) {
+      scrollController.animateTo(
+        scrollController.position.minScrollExtent,
+        duration: const Duration(milliseconds: 200),
+        curve: Curves.easeInOut,
+      );
+    }
+  }
+
+  @override
+  Map<String, dynamic> get control => {"toTop": toTop};
 }
 
 class _MixedExplorePage extends StatefulWidget {
-  const _MixedExplorePage(this.data, this.sourceKey, {super.key});
+  const _MixedExplorePage(this.data, this.sourceKey, {super.key, this.controller});
 
   final ExplorePageData data;
 
   final String sourceKey;
 
+  final ScrollController? controller;
+
   @override
   State<_MixedExplorePage> createState() => _MixedExplorePageState();
 }
@@ -394,6 +434,7 @@ class _MixedExplorePageState
   @override
   Widget buildContent(BuildContext context, List<Object> data) {
     return SmoothCustomScrollView(
+      controller: widget.controller,
       slivers: [
         ...buildSlivers(context, data),
         if (haveNextPage) const ListLoadingIndicator().toSliver()

lib/pages/favorites/favorite_actions.dart

@@ -1,3 +1,5 @@
+import 'package:venera/foundation/appdata.dart';
+
 part of 'favorites_page.dart';
 
 /// Open a dialog to create a new favorite folder.
@@ -83,7 +85,7 @@ void addFavorite(Comic comic) {
   showDialog(
     context: App.rootContext,
     builder: (context) {
-      String? selectedFolder;
+      String? selectedFolder = appdata.settings['quickFavorite'];
 
       return StatefulBuilder(builder: (context, setState) {
         return ContentDialog(

lib/pages/favorites/favorites_page.dart

@@ -1,7 +1,6 @@
 import 'dart:convert';
 import 'dart:math';
 
-import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_reorderable_grid_view/widgets/reorderable_builder.dart';
 import 'package:venera/components/components.dart';
@@ -11,9 +10,7 @@ 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/local.dart';
 import 'package:venera/foundation/res.dart';
-import 'package:venera/network/download.dart';
 import 'package:venera/pages/comic_page.dart';
 import 'package:venera/utils/io.dart';
 import 'package:venera/utils/translations.dart';

lib/pages/history_page.dart

@@ -78,33 +78,7 @@ class _HistoryPageState extends State<HistoryPage> {
             ],
           ),
           SliverGridComics(
-            comics: comics.map(
+            comics: comics,
-              (e) {
-                var cover = e.cover;
-                if (!cover.isURL) {
-                  var localComic = LocalManager().find(
-                    e.id,
-                    e.type,
-                  );
-                  if(localComic != null) {
-                    cover = "file://${localComic.coverFile.path}";
-                  }
-                }
-                return Comic(
-                  e.title,
-                  cover,
-                  e.id,
-                  e.subtitle,
-                  null,
-                  getDescription(e),
-                  e.type == ComicType.local
-                      ? 'local'
-                      : e.type.comicSource?.key ?? "Unknown:${e.type.value}",
-                  null,
-                  null,
-                );
-              },
-            ).toList(),
             badgeBuilder: (c) {
               return ComicSource.find(c.sourceKey)?.name;
             },

lib/pages/home_page.dart

@@ -7,6 +7,8 @@ import 'package:venera/foundation/consts.dart';
 import 'package:venera/foundation/favorites.dart';
 import 'package:venera/foundation/history.dart';
 import 'package:venera/foundation/image_provider/cached_image.dart';
+import 'package:venera/foundation/image_provider/history_image_provider.dart';
+import 'package:venera/foundation/image_provider/local_comic_image.dart';
 import 'package:venera/foundation/local.dart';
 import 'package:venera/pages/accounts_page.dart';
 import 'package:venera/pages/comic_page.dart';
@@ -264,21 +266,6 @@ class _HistoryState extends State<_History> {
                     scrollDirection: Axis.horizontal,
                     itemCount: history.length,
                     itemBuilder: (context, index) {
-                      var cover = history[index].cover;
-                      ImageProvider imageProvider = CachedImageProvider(
-                        cover,
-                        sourceKey: history[index].type.comicSource?.key,
-                        cid: history[index].id,
-                      );
-                      if (!cover.isURL) {
-                        var localComic = LocalManager().find(
-                          history[index].id,
-                          history[index].type,
-                        );
-                        if (localComic != null) {
-                          imageProvider = FileImage(localComic.coverFile);
-                        }
-                      }
                       return InkWell(
                         onTap: () {
                           context.to(
@@ -301,7 +288,7 @@ class _HistoryState extends State<_History> {
                           ),
                           clipBehavior: Clip.antiAlias,
                           child: AnimatedImage(
-                            image: imageProvider,
+                            image: HistoryImageProvider(history[index]),
                             width: 96,
                             height: 128,
                             fit: BoxFit.cover,
@@ -418,8 +405,8 @@ class _LocalState extends State<_Local> {
                           ),
                           clipBehavior: Clip.antiAlias,
                           child: AnimatedImage(
-                            image: FileImage(
+                            image: LocalComicImageProvider(
-                              local[index].coverFile,
+                              local[index],
                             ),
                             width: 96,
                             height: 128,
@@ -511,7 +498,7 @@ class _ImportComicsWidgetState extends State<_ImportComicsWidget> {
     String info = [
       "Select a directory which contains the comic files.".tl,
       "Select a directory which contains the comic directories.".tl,
-      "Select a cbz file.".tl,
+      "Select a cbz/zip file.".tl,
       "Select an EhViewer database and a download folder.".tl
     ][type];
     List<String> importMethods = [

lib/pages/local_comics_page.dart

@@ -4,9 +4,11 @@ import 'package:venera/foundation/app.dart';
 import 'package:venera/foundation/appdata.dart';
 import 'package:venera/foundation/comic_source/comic_source.dart';
 import 'package:venera/foundation/local.dart';
+import 'package:venera/foundation/log.dart';
 import 'package:venera/pages/downloading_page.dart';
 import 'package:venera/utils/cbz.dart';
 import 'package:venera/utils/io.dart';
+import 'package:venera/utils/pdf.dart';
 import 'package:venera/utils/translations.dart';
 
 class LocalComicsPage extends StatefulWidget {
@@ -299,8 +301,7 @@ class _LocalComicsPageState extends State<LocalComicsPage> {
                               return ContentDialog(
                                 title: "Delete".tl,
                                 content: CheckboxListTile(
-                                  title:
+                                  title: Text("Also remove files on disk".tl),
-                                  Text("Also remove files on disk".tl),
                                   value: removeComicFile,
                                   onChanged: (v) {
                                     state(() {
@@ -361,6 +362,34 @@ class _LocalComicsPageState extends State<LocalComicsPage> {
                       }
                       controller.close();
                     }),
+                if (!multiSelectMode)
+                  MenuEntry(
+                    icon: Icons.picture_as_pdf_outlined,
+                    text: "Export as pdf".tl,
+                    onClick: () async {
+                      var cache = FilePath.join(App.cachePath, 'temp.pdf');
+                      var controller = showLoadingDialog(
+                        context,
+                        allowCancel: false,
+                      );
+                      try {
+                        await createPdfFromComicIsolate(
+                          comic: c as LocalComic,
+                          savePath: cache,
+                        );
+                        await saveFile(
+                          file: File(cache),
+                          filename: "${c.title}.pdf",
+                        );
+                      } catch (e, s) {
+                        Log.error("PDF Export", e, s);
+                        context.showMessage(message: e.toString());
+                      } finally {
+                        controller.close();
+                        File(cache).deleteIgnoreError();
+                      }
+                    },
+                  )
               ];
             },
           ),

lib/pages/reader/gesture.dart

@@ -103,6 +103,9 @@ class _ReaderGestureDetectorState extends State<_ReaderGestureDetector> {
   }
 
   void onMouseWheel(bool forward) {
+    if (HardwareKeyboard.instance.isControlPressed) {
+      return;
+    }
     if (context.reader.mode.key.startsWith('gallery')) {
       if (forward) {
         if (!context.reader.toNextPage()) {

lib/pages/reader/images.dart

@@ -83,7 +83,8 @@ class _ReaderImagesState extends State<_ReaderImages> {
       );
     } else {
       if (reader.mode.isGallery) {
-        return _GalleryMode(key: Key(reader.mode.key));
+        return _GalleryMode(
+            key: Key('${reader.mode.key}_${reader.imagesPerPage}'));
       } else {
         return _ContinuousMode(key: Key(reader.mode.key));
       }
@@ -110,6 +111,10 @@ class _GalleryModeState extends State<_GalleryMode>
 
   late _ReaderState reader;
 
+  int get totalPages => ((reader.images!.length + reader.imagesPerPage - 1) /
+          reader.imagesPerPage)
+      .ceil();
+
   @override
   void initState() {
     reader = context.reader;
@@ -124,8 +129,14 @@ class _GalleryModeState extends State<_GalleryMode>
 
   void cache(int current) {
     for (int i = current + 1; i <= current + preCacheCount; i++) {
-      if (i <= reader.maxPage && !cached[i]) {
+      if (i <= totalPages && !cached[i]) {
-        _precacheImage(i, context);
+        int startIndex = (i - 1) * reader.imagesPerPage;
+        int endIndex =
+            math.min(startIndex + reader.imagesPerPage, reader.images!.length);
+        for (int i = startIndex; i < endIndex; i++) {
+          precacheImage(
+              _createImageProviderFromKey(reader.images![i], context), context);
+        }
         cached[i] = true;
       }
     }
@@ -141,32 +152,43 @@ class _GalleryModeState extends State<_GalleryMode>
       scrollDirection: reader.mode == ReaderMode.galleryTopToBottom
           ? Axis.vertical
           : Axis.horizontal,
-      itemCount: reader.images!.length + 2,
+      itemCount: totalPages + 2,
       builder: (BuildContext context, int index) {
-        ImageProvider? imageProvider;
+        if (index == 0 || index == totalPages + 1) {
-        if (index != 0 && index != reader.images!.length + 1) {
-          imageProvider = _createImageProvider(index, context);
-        } else {
           return PhotoViewGalleryPageOptions.customChild(
             scaleStateController: PhotoViewScaleStateController(),
             child: const SizedBox(),
           );
-        }
+        } else {
+          int pageIndex = index - 1;
+          int startIndex = pageIndex * reader.imagesPerPage;
+          int endIndex = math.min(startIndex + reader.imagesPerPage, reader.images!.length);
+          List<String> pageImages = reader.images!.sublist(startIndex, endIndex);
 
           cached[index] = true;
           cache(index);
 
-        photoViewControllers[index] ??= PhotoViewController();
+          photoViewControllers[index] = PhotoViewController();
 
+          if(reader.imagesPerPage == 1) {
             return PhotoViewGalleryPageOptions(
               filterQuality: FilterQuality.medium,
               controller: photoViewControllers[index],
-          imageProvider: imageProvider,
+              imageProvider: _createImageProviderFromKey(pageImages[0], context),
               fit: BoxFit.contain,
               errorBuilder: (_, error, s, retry) {
                 return NetworkError(message: error.toString(), retry: retry);
               },
             );
+          }
+
+          return PhotoViewGalleryPageOptions.customChild(
+            controller: photoViewControllers[index],
+            minScale: PhotoViewComputedScale.contained * 1.0,
+            maxScale: PhotoViewComputedScale.covered * 10.0,
+            child: buildPageImages(pageImages),
+          );
+        }
       },
       pageController: controller,
       loadingBuilder: (context, event) => Center(
@@ -186,9 +208,9 @@ class _GalleryModeState extends State<_GalleryMode>
           if (!reader.toPrevChapter()) {
             reader.toPage(1);
           }
-        } else if (i == reader.maxPage + 1) {
+        } else if (i == totalPages + 1) {
           if (!reader.toNextChapter()) {
-            reader.toPage(reader.maxPage);
+            reader.toPage(totalPages);
           }
         } else {
           reader.setPage(i);
@@ -198,9 +220,30 @@ class _GalleryModeState extends State<_GalleryMode>
     );
   }
 
+  Widget buildPageImages(List<String> images) {
+    Axis axis = (reader.mode == ReaderMode.galleryTopToBottom)
+        ? Axis.vertical
+        : Axis.horizontal;
+
+    List<Widget> imageWidgets = images.map((imageKey) {
+      ImageProvider imageProvider =
+          _createImageProviderFromKey(imageKey, context);
+      return Expanded(
+        child: Image(
+          image: imageProvider,
+          fit: BoxFit.contain,
+        ),
+      );
+    }).toList();
+
+    return axis == Axis.vertical
+        ? Column(children: imageWidgets)
+        : Row(children: imageWidgets);
+  }
+
   @override
   Future<void> animateToPage(int page) {
-    if ((page - controller.page!).abs() > 1) {
+    if ((page - controller.page!.round()).abs() > 1) {
       controller.jumpToPage(page > controller.page! ? page - 1 : page + 1);
     }
     return controller.animateToPage(
@@ -600,11 +643,26 @@ class _ContinuousModeState extends State<_ContinuousMode>
   }
 }
 
+ImageProvider _createImageProviderFromKey(
+    String imageKey, BuildContext context) {
+  if (imageKey.startsWith('file://')) {
+    return FileImage(File(imageKey.replaceFirst("file://", '')));
+  } else {
+    var reader = context.reader;
+    return ReaderImageProvider(
+      imageKey,
+      reader.type.comicSource!.key,
+      reader.cid,
+      reader.eid,
+    );
+  }
+}
+
 ImageProvider _createImageProvider(int page, BuildContext context) {
   var reader = context.reader;
   var imageKey = reader.images![page - 1];
   if (imageKey.startsWith('file://')) {
-    return FileImage(openFilePlatform(imageKey.replaceFirst("file://", '')));
+    return FileImage(File(imageKey.replaceFirst("file://", '')));
   } else {
     return ReaderImageProvider(
       imageKey,

lib/pages/reader/reader.dart

@@ -1,6 +1,7 @@
 library venera_reader;
 
 import 'dart:async';
+import 'dart:math' as math;
 
 import 'package:flutter/foundation.dart';
 import 'package:flutter/gestures.dart';
@@ -82,7 +83,8 @@ class _ReaderState extends State<Reader> with _ReaderLocation, _ReaderWindow {
   }
 
   @override
-  int get maxPage => images?.length ?? 1;
+  int get maxPage =>
+      ((images?.length ?? 1) + imagesPerPage - 1) ~/ imagesPerPage;
 
   ComicType get type => widget.type;
 
@@ -94,6 +96,30 @@ class _ReaderState extends State<Reader> with _ReaderLocation, _ReaderWindow {
 
   late ReaderMode mode;
 
+  int get imagesPerPage => appdata.settings['readerScreenPicNumber'] ?? 1;
+
+  int _lastImagesPerPage = appdata.settings['readerScreenPicNumber'] ?? 1;
+
+  @override
+  void didChangeDependencies() {
+    super.didChangeDependencies();
+    _checkImagesPerPageChange();
+  }
+
+  void _checkImagesPerPageChange() {
+    int currentImagesPerPage = imagesPerPage;
+    if (_lastImagesPerPage != currentImagesPerPage) {
+      _adjustPageForImagesPerPageChange(_lastImagesPerPage, currentImagesPerPage);
+      _lastImagesPerPage = currentImagesPerPage;
+    }
+  }
+
+  void _adjustPageForImagesPerPageChange(int oldImagesPerPage, int newImagesPerPage) {
+    int previousImageIndex = (page - 1) * oldImagesPerPage;
+    int newPage = (previousImageIndex ~/ newImagesPerPage) + 1;
+    page = newPage;
+  }
+
   History? history;
 
   @override
@@ -133,6 +159,7 @@ class _ReaderState extends State<Reader> with _ReaderLocation, _ReaderWindow {
 
   @override
   Widget build(BuildContext context) {
+    _checkImagesPerPageChange();
     return KeyboardListener(
       focusNode: focusNode,
       autofocus: true,

lib/pages/reader/scaffold.dart

@@ -469,7 +469,7 @@ class _ReaderScaffoldState extends State<_ReaderScaffold> {
               ImageProvider image;
               var imageKey = images[index];
               if (imageKey.startsWith('file://')) {
-                image = FileImage(openFilePlatform(imageKey.replaceFirst("file://", '')));
+                image = FileImage(File(imageKey.replaceFirst("file://", '')));
               } else {
                 image = ReaderImageProvider(
                   imageKey,
@@ -515,7 +515,7 @@ class _ReaderScaffoldState extends State<_ReaderScaffold> {
       }
     }
     if (imageKey.startsWith("file://")) {
-      return await openFilePlatform(imageKey.substring(7)).readAsBytes();
+      return await File(imageKey.substring(7)).readAsBytes();
     } else {
       return (await CacheManager().findCache(
               "$imageKey@${context.reader.type.sourceKey}@${context.reader.cid}@${context.reader.eid}"))!

lib/pages/settings/about.dart

@@ -68,6 +68,13 @@ class _AboutSettingsState extends State<AboutSettings> {
             launchUrlString("https://github.com/venera-app/venera");
           },
         ).toSliver(),
+        ListTile(
+          title: const Text("Telegram"),
+          trailing: const Icon(Icons.open_in_new),
+          onTap: () {
+            launchUrlString("https://t.me/venera_release");
+          },
+        ).toSliver(),
       ],
     );
   }

lib/pages/settings/app.dart

@@ -34,25 +34,8 @@ class _AppSettingsState extends State<AppSettings> {
           callback: () async {
             String? result;
             if (App.isAndroid) {
-              var channel = const MethodChannel("venera/storage");
+              var picker = DirectoryPicker();
-              var permission = await channel.invokeMethod('');
+              result = (await picker.pickDirectory())?.path;
-              if (permission != true) {
-                context.showMessage(message: "Permission denied".tl);
-                return;
-              }
-              var path = await selectDirectory();
-              if (path != null) {
-                // check if the path is writable
-                var testFile = File(FilePath.join(path, "test"));
-                try {
-                  await testFile.writeAsBytes([1]);
-                  await testFile.delete();
-                } catch (e) {
-                  context.showMessage(message: "Permission denied".tl);
-                  return;
-                }
-                result = path;
-              }
             } else if (App.isIOS) {
               result = await selectDirectoryIOS();
             } else {
@@ -127,16 +110,23 @@ class _AppSettingsState extends State<AppSettings> {
           title: "Import App Data".tl,
           callback: () async {
             var controller = showLoadingDialog(context);
-            var file = await selectFile(ext: ['venera']);
+            var file = await selectFile(ext: ['venera', 'picadata']);
             if (file != null) {
-              var cacheFile = File(FilePath.join(App.cachePath, "temp.venera"));
+              var cacheFile = File(FilePath.join(App.cachePath, "import_data_temp"));
               await file.saveTo(cacheFile.path);
               try {
+                if(file.name.endsWith('picadata')) {
+                  await importPicaData(cacheFile);
+                } else {
                   await importAppData(cacheFile);
+                }
               } catch (e, s) {
                 Log.error("Import data", e.toString(), s);
                 context.showMessage(message: "Failed to import data".tl);
               }
+              finally {
+                cacheFile.deleteIgnoreError();
+              }
             }
             controller.close();
           },

lib/pages/settings/reader.dart

@@ -41,6 +41,11 @@ class _ReaderSettingsState extends State<ReaderSettings> {
             "continuousTopToBottom": "Continuous (Top to Bottom)".tl,
           },
           onChanged: () {
+            var readerMode = appdata.settings['readerMode'];
+            if (readerMode?.toLowerCase().startsWith('continuous') ?? false) {
+              appdata.settings['readerScreenPicNumber'] = 1;
+              widget.onChanged?.call('readerScreenPicNumber');
+            }
             widget.onChanged?.call("readerMode");
           },
         ).toSliver(),
@@ -54,6 +59,25 @@ class _ReaderSettingsState extends State<ReaderSettings> {
             widget.onChanged?.call("autoPageTurningInterval");
           },
         ).toSliver(),
+        SliverToBoxAdapter(
+          child: AbsorbPointer(
+            absorbing: (appdata.settings['readerMode']?.toLowerCase().startsWith('continuous') ?? false),
+            child: AnimatedOpacity(
+              opacity: (appdata.settings['readerMode']?.toLowerCase().startsWith('continuous') ?? false) ? 0.5 : 1.0,
+              duration: Duration(milliseconds: 300),
+              child: _SliderSetting(
+                title: "The number of pic in screen (Only Gallery Mode)".tl,
+                settingsIndex: "readerScreenPicNumber",
+                interval: 1,
+                min: 1,
+                max: 5,
+                onChanged: () {
+                  widget.onChanged?.call("readerScreenPicNumber");
+                },
+              ),
+            ),
+          ),
+        ),
         _SwitchSetting(
           title: 'Long press to zoom'.tl,
           settingKey: 'enableLongPressToZoom',

lib/pages/settings/settings_page.dart

@@ -178,8 +178,9 @@ class _SettingsPageState extends State<SettingsPage> implements PopEntry {
           Positioned.fill(child: buildLeft()),
           Positioned(
             left: offset,
-            width: MediaQuery.of(context).size.width,
+            right: 0,
-            height: MediaQuery.of(context).size.height,
+            top: 0,
+            bottom: 0,
             child: Listener(
               onPointerDown: handlePointerDown,
               child: AnimatedSwitcher(

lib/utils/cbz.dart

@@ -104,14 +104,14 @@ abstract class CBZ {
       FilePath.join(LocalManager().path, sanitizeFileName(metaData.title)),
     );
     dest.createSync();
-    coverFile.copy(
+    coverFile.copyMem(
-        FilePath.join(dest.path, 'cover.${coverFile.path.split('.').last}'));
+        FilePath.join(dest.path, 'cover.${coverFile.extension}'));
     if (metaData.chapters == null) {
       for (var i = 0; i < files.length; i++) {
         var src = files[i];
         var dst = File(
             FilePath.join(dest.path, '${i + 1}.${src.path.split('.').last}'));
-        await src.copy(dst.path);
+        await src.copyMem(dst.path);
       }
     } else {
       dest.createSync();
@@ -129,7 +129,7 @@ abstract class CBZ {
           var src = chapter.value[i];
           var dst = File(FilePath.join(
               chapterDir.path, '${i + 1}.${src.path.split('.').last}'));
-          await src.copy(dst.path);
+          await src.copyMem(dst.path);
         }
       }
     }
@@ -142,10 +142,9 @@ abstract class CBZ {
       directory: dest.name,
       chapters: cpMap,
       downloadedChapters: cpMap?.keys.toList() ?? [],
-      cover: 'cover.${coverFile.path.split('.').last}',
+      cover: 'cover.${coverFile.extension}',
       createdAt: DateTime.now(),
     );
-    LocalManager().add(comic);
     await cache.delete(recursive: true);
     return comic;
   }
@@ -164,7 +163,7 @@ abstract class CBZ {
         var dstName =
             '${i.toString().padLeft(width, '0')}.${image.split('.').last}';
         var dst = File(FilePath.join(cache.path, dstName));
-        await src.copy(dst.path);
+        await src.copyMem(dst.path);
         i++;
       }
     } else {
@@ -187,18 +186,18 @@ abstract class CBZ {
       }
       int i = 1;
       for (var image in allImages) {
-        var src = openFilePlatform(image);
+        var src = File(image);
         var width = allImages.length.toString().length;
         var dstName =
             '${i.toString().padLeft(width, '0')}.${image.split('.').last}';
         var dst = File(FilePath.join(cache.path, dstName));
-        await src.copy(dst.path);
+        await src.copyMem(dst.path);
         i++;
       }
     }
     var cover = comic.coverFile;
     await cover
-        .copy(FilePath.join(cache.path, 'cover.${cover.path.split('.').last}'));
+        .copyMem(FilePath.join(cache.path, 'cover.${cover.path.split('.').last}'));
     await File(FilePath.join(cache.path, 'metadata.json')).writeAsString(
       jsonEncode(
         ComicMetaData(

lib/utils/data.dart

@@ -1,11 +1,14 @@
 import 'dart:convert';
 import 'dart:isolate';
 
+import 'package:sqlite3/sqlite3.dart';
 import 'package:venera/foundation/app.dart';
 import 'package:venera/foundation/appdata.dart';
 import 'package:venera/foundation/comic_source/comic_source.dart';
+import 'package:venera/foundation/comic_type.dart';
 import 'package:venera/foundation/favorites.dart';
 import 'package:venera/foundation/history.dart';
+import 'package:venera/foundation/log.dart';
 import 'package:venera/network/cookie_jar.dart';
 import 'package:zip_flutter/zip_flutter.dart';
 
@@ -43,6 +46,11 @@ Future<File> exportAppData() async {
 Future<void> importAppData(File file, [bool checkVersion = false]) async {
   var cacheDirPath = FilePath.join(App.cachePath, 'temp_data');
   var cacheDir = Directory(cacheDirPath);
+  if (cacheDir.existsSync()) {
+    cacheDir.deleteSync(recursive: true);
+  }
+  cacheDir.createSync();
+  try {
     await Isolate.run(() {
       ZipFile.openAndExtract(file.path, cacheDirPath);
     });
@@ -65,7 +73,8 @@ Future<void> importAppData(File file, [bool checkVersion = false]) async {
     }
     if (await localFavoriteFile.exists()) {
       LocalFavoritesManager().close();
-    File(FilePath.join(App.dataPath, "local_favorite.db")).deleteIfExistsSync();
+      File(FilePath.join(App.dataPath, "local_favorite.db"))
+          .deleteIfExistsSync();
       localFavoriteFile
           .renameSync(FilePath.join(App.dataPath, "local_favorite.db"));
       LocalFavoritesManager().init();
@@ -93,11 +102,109 @@ Future<void> importAppData(File file, [bool checkVersion = false]) async {
     if (Directory(comicSourceDir).existsSync()) {
       for (var file in Directory(comicSourceDir).listSync()) {
         if (file is File) {
-        var targetFile = FilePath.join(App.dataPath, "comic_source", file.name);
+          var targetFile =
+              FilePath.join(App.dataPath, "comic_source", file.name);
           File(targetFile).deleteIfExistsSync();
           await file.copy(targetFile);
         }
       }
       await ComicSource.reload();
     }
+  } finally {
+    cacheDir.deleteIgnoreError(recursive: true);
+  }
+}
+
+Future<void> importPicaData(File file) async {
+  var cacheDirPath = FilePath.join(App.cachePath, 'temp_data');
+  var cacheDir = Directory(cacheDirPath);
+  if (cacheDir.existsSync()) {
+    cacheDir.deleteSync(recursive: true);
+  }
+  cacheDir.createSync();
+  try {
+    await Isolate.run(() {
+      ZipFile.openAndExtract(file.path, cacheDirPath);
+    });
+    var localFavoriteFile = cacheDir.joinFile("local_favorite.db");
+    if (localFavoriteFile.existsSync()) {
+      var db = sqlite3.open(localFavoriteFile.path);
+      try {
+        var folderNames = db
+            .select("SELECT name FROM sqlite_master WHERE type='table';")
+            .map((e) => e["name"] as String)
+            .toList();
+        folderNames.removeWhere((e) => e == "folder_order" || e == "folder_sync");
+        for (var folderName in folderNames) {
+          if (!LocalFavoritesManager().existsFolder(folderName)) {
+            LocalFavoritesManager().createFolder(folderName);
+          }
+          for (var comic in db.select("SELECT * FROM \"$folderName\";")) {
+            LocalFavoritesManager().addComic(
+              folderName,
+              FavoriteItem(
+                id: comic['target'],
+                name: comic['name'],
+                coverPath: comic['cover_path'],
+                author: comic['author'],
+                type: ComicType(switch(comic['type']) {
+                  0 => 'picacg'.hashCode,
+                  1 => 'ehentai'.hashCode,
+                  2 => 'jm'.hashCode,
+                  3 => 'hitomi'.hashCode,
+                  4 => 'wnacg'.hashCode,
+                  6 => 'nhentai'.hashCode,
+                  _ => comic['type']
+                }),
+                tags: comic['tags'].split(','),
+              ),
+            );
+          }
+        }
+      }
+      catch(e) {
+        Log.error("Import Data", "Failed to import local favorite: $e");
+      }
+      finally {
+        db.dispose();
+      }
+    }
+    var historyFile = cacheDir.joinFile("history.db");
+    if (historyFile.existsSync()) {
+      var db = sqlite3.open(historyFile.path);
+      try {
+        for (var comic in db.select("SELECT * FROM history;")) {
+          HistoryManager().addHistory(
+            History.fromMap({
+              "type": switch(comic['type']) {
+                0 => 'picacg'.hashCode,
+                1 => 'ehentai'.hashCode,
+                2 => 'jm'.hashCode,
+                3 => 'hitomi'.hashCode,
+                4 => 'wnacg'.hashCode,
+                6 => 'nhentai'.hashCode,
+                _ => comic['type']
+              },
+              "id": comic['target'],
+              "maxPage": comic["max_page"],
+              "ep": comic["ep"],
+              "page": comic["page"],
+              "time": comic["time"],
+              "title": comic["title"],
+              "subtitle": comic["subtitle"],
+              "cover": comic["cover"],
+            }),
+          );
+        }
+      }
+      catch(e) {
+        Log.error("Import Data", "Failed to import history: $e");
+      }
+      finally {
+        db.dispose();
+      }
+    }
+  } finally {
+    cacheDir.deleteIgnoreError(recursive: true);
+  }
 }

lib/utils/file_type.dart

@@ -13,7 +13,7 @@ class FileType {
     var mime = lookupMimeType('no-file.$ext') ?? 'application/octet-stream';
     // Android doesn't support some mime types
     mime = switch(mime) {
-      'text/javascript' => 'application/javascript',
+      'text/javascript' => 'application/octet-stream',
       'application/x-cbr' => 'application/octet-stream',
       _ => mime,
     };

lib/utils/import_comic.dart

@@ -20,7 +20,7 @@ class ImportComic {
   const ImportComic({this.selectedFolder, this.copyToLocal = true});
 
   Future<bool> cbz() async {
-    var file = await selectFile(ext: ['cbz']);
+    var file = await selectFile(ext: ['cbz', 'zip']);
     Map<String?, List<LocalComic>> imported = {};
     if (file == null) {
       return false;
@@ -34,7 +34,7 @@ class ImportComic {
       App.rootContext.showMessage(message: e.toString());
     }
     controller.close();
-    return registerComics(imported, true);
+    return registerComics(imported, false);
   }
 
   Future<bool> ehViewer() async {
@@ -60,7 +60,7 @@ class ImportComic {
           if (cancelled) {
             return imported;
           }
-          var comicDir = openDirectoryPlatform(
+          var comicDir = Directory(
               FilePath.join(comicSrc.path, comic['DIRNAME'] as String));
           String titleJP =
               comic['TITLE_JPN'] == null ? "" : comic['TITLE_JPN'] as String;
@@ -105,8 +105,7 @@ class ImportComic {
         if (cancelled) {
           break;
         }
-        var folderName =
+        var folderName = tag == '' ? '(EhViewer)Default'.tl : '(EhViewer)$tag';
-        tag == '' ? '(EhViewer)Default'.tl : '(EhViewer)$tag';
         var comicList = db.select("""
               SELECT * 
               FROM DOWNLOAD_DIRNAME DN
@@ -176,8 +175,7 @@ class ImportComic {
       String? title,
       String? subtitle,
       List<String>? tags,
-        DateTime? createTime})
+      DateTime? createTime}) async {
-  async {
     if (!(await directory.exists())) return null;
     var name = title ?? directory.name;
     if (LocalManager().findByName(name) != null) {
@@ -212,12 +210,13 @@ class ImportComic {
     }
 
     fileList.sort();
-    coverPath = fileList.firstWhereOrNull((l) => l.startsWith('cover')) ?? fileList.first;
+    coverPath = fileList.firstWhereOrNull((l) => l.startsWith('cover')) ??
+        fileList.first;
 
     chapters.sort();
     if (hasChapters && coverPath == '') {
       // use the first image in the first chapter as the cover
-      var firstChapter = openDirectoryPlatform('${directory.path}/${chapters.first}');
+      var firstChapter = Directory('${directory.path}/${chapters.first}');
       await for (var entry in firstChapter.list()) {
         if (entry is File) {
           coverPath = entry.name;
@@ -243,19 +242,21 @@ class ImportComic {
     );
   }
 
-  static Future<Map<String, String>> _copyDirectories(Map<String, dynamic> data) async {
+  static Future<Map<String, String>> _copyDirectories(
+      Map<String, dynamic> data) async {
+    return overrideIO(() async {
       var toBeCopied = data['toBeCopied'] as List<String>;
       var destination = data['destination'] as String;
       Map<String, String> result = {};
       for (var dir in toBeCopied) {
-      var source = openDirectoryPlatform(dir);
+        var source = Directory(dir);
-      var dest = openDirectoryPlatform("$destination/${source.name}");
+        var dest = Directory("$destination/${source.name}");
         if (dest.existsSync()) {
           // The destination directory already exists, and it is not managed by the app.
           // Rename the old directory to avoid conflicts.
           Log.info("Import Comic",
               "Directory already exists: ${source.name}\nRenaming the old directory.");
-        await dest.rename(
+          dest.renameSync(
               findValidDirectoryName(dest.parent.path, "${dest.path}_old"));
         }
         dest.createSync();
@@ -263,6 +264,7 @@ class ImportComic {
         result[source.path] = dest.path;
       }
       return result;
+    });
   }
 
   Future<Map<String?, List<LocalComic>>> _copyComicsToLocalDir(
@@ -284,13 +286,13 @@ class ImportComic {
         // copy the comics to the local directory
         var pathMap = await compute<Map<String, dynamic>, Map<String, String>>(
             _copyDirectories, {
-          'toBeCopied': comics[favoriteFolder]!.map((e) => e.directory).toList(),
+          'toBeCopied':
+              comics[favoriteFolder]!.map((e) => e.directory).toList(),
           'destination': destPath,
         });
         //Construct a new object since LocalComic.directory is a final String
         for (var c in comics[favoriteFolder]!) {
-          result[favoriteFolder]!.add(
+          result[favoriteFolder]!.add(LocalComic(
-              LocalComic(
             id: c.id,
             title: c.title,
             subtitle: c.subtitle,
@@ -300,20 +302,20 @@ class ImportComic {
             cover: c.cover,
             comicType: c.comicType,
             downloadedChapters: c.downloadedChapters,
-                  createdAt: c.createdAt
+            createdAt: c.createdAt,
-              )
+          ));
-          );
         }
-      } catch (e) {
+      } catch (e, s) {
         App.rootContext.showMessage(message: "Failed to copy comics".tl);
-        Log.error("Import Comic", e.toString());
+        Log.error("Import Comic", e.toString(), s);
         return result;
       }
     }
     return result;
   }
 
-  Future<bool> registerComics(Map<String?, List<LocalComic>> importedComics, bool copy) async {
+  Future<bool> registerComics(
+      Map<String?, List<LocalComic>> importedComics, bool copy) async {
     try {
       if (copy) {
         importedComics = await _copyComicsToLocalDir(importedComics);
@@ -334,9 +336,7 @@ class ImportComic {
                     author: comic.subtitle,
                     type: comic.comicType,
                     tags: comic.tags,
-                  favoriteTime: comic.createdAt
+                    favoriteTime: comic.createdAt));
-                )
-            );
           }
         }
       }
@@ -344,9 +344,9 @@ class ImportComic {
           message: "Imported @a comics".tlParams({
         'a': importedCount,
       }));
-    } catch(e) {
+    } catch (e, s) {
       App.rootContext.showMessage(message: "Failed to register comics".tl);
-      Log.error("Import Comic", e.toString());
+      Log.error("Import Comic", e.toString(), s);
       return false;
     }
     return true;

lib/utils/io.dart

@@ -73,6 +73,15 @@ extension FileSystemEntityExt on FileSystemEntity {
 
 extension FileExtension on File {
   String get extension => path.split('.').last;
+
+  /// Copy the file to the specified path using memory.
+  ///
+  /// This method prevents errors caused by files from different file systems.
+  Future<void> copyMem(String newPath) async {
+    var newFile = File(newPath);
+    // Stream is not usable since [AndroidFile] does not support [openRead].
+    await newFile.writeAsBytes(await readAsBytes());
+  }
 }
 
 extension DirectoryExtension on Directory {
@@ -81,7 +90,7 @@ extension DirectoryExtension on Directory {
     int total = 0;
     for (var f in listSync(recursive: true)) {
       if (FileSystemEntity.typeSync(f.path) == FileSystemEntityType.file) {
-        total += await openFilePlatform(f.path).length();
+        total += await File(f.path).length();
       }
     }
     return total;
@@ -93,7 +102,21 @@ extension DirectoryExtension on Directory {
   }
 
   File joinFile(String name) {
-    return openFilePlatform(FilePath.join(path, name));
+    return File(FilePath.join(path, name));
+  }
+
+  void deleteContentsSync({recursive = true}) {
+    if (!existsSync()) return;
+    for (var f in listSync()) {
+      f.deleteIfExistsSync(recursive: recursive);
+    }
+  }
+
+  Future<void> deleteContents({recursive = true}) async {
+    if (!existsSync()) return;
+    for (var f in listSync()) {
+      await f.deleteIfExists(recursive: recursive);
+    }
   }
 }
 
@@ -124,14 +147,15 @@ String sanitizeFileName(String fileName) {
 Future<void> copyDirectory(Directory source, Directory destination) async {
   List<FileSystemEntity> contents = source.listSync();
   for (FileSystemEntity content in contents) {
-    String newPath = destination.path +
+    String newPath = FilePath.join(destination.path, content.name);
-        Platform.pathSeparator +
-        content.path.split(Platform.pathSeparator).last;
 
     if (content is File) {
-      content.copySync(newPath);
+      var resultFile = File(newPath);
+      resultFile.createSync();
+      var data = content.readAsBytesSync();
+      resultFile.writeAsBytesSync(data);
     } else if (content is Directory) {
-      Directory newDirectory = openDirectoryPlatform(newPath);
+      Directory newDirectory = Directory(newPath);
       newDirectory.createSync();
       copyDirectory(content.absolute, newDirectory.absolute);
     }
@@ -140,18 +164,16 @@ Future<void> copyDirectory(Directory source, Directory destination) async {
 
 Future<void> copyDirectoryIsolate(
     Directory source, Directory destination) async {
-  await Isolate.run(() {
+  await Isolate.run(() => overrideIO(() => copyDirectory(source, destination)));
-    copyDirectory(source, destination);
-  });
 }
 
 String findValidDirectoryName(String path, String directory) {
   var name = sanitizeFileName(directory);
-  var dir = openDirectoryPlatform("$path/$name");
+  var dir = Directory("$path/$name");
   var i = 1;
   while (dir.existsSync() && dir.listSync().isNotEmpty) {
     name = sanitizeFileName("$directory($i)");
-    dir = openDirectoryPlatform("$path/$name");
+    dir = Directory("$path/$name");
     i++;
   }
   return name;
@@ -184,11 +206,12 @@ class DirectoryPicker {
         directory = (await AndroidDirectory.pickDirectory())?.path;
       } else {
         // ios, macos
-        directory = await _methodChannel.invokeMethod<String?>("getDirectoryPath");
+        directory =
+            await _methodChannel.invokeMethod<String?>("getDirectoryPath");
       }
       if (directory == null) return null;
       _finalizer.attach(this, directory);
-      return openDirectoryPlatform(directory);
+      return Directory(directory);
     } finally {
       Future.delayed(const Duration(milliseconds: 100), () {
         IO._isSelectingFiles = false;
@@ -249,7 +272,9 @@ Future<FileSelectResult?> selectFile({required List<String> ext}) async {
       file = FileSelectResult(xFile.path);
     }
     if (!ext.contains(file.path.split(".").last)) {
-      App.rootContext.showMessage(message: "Invalid file type");
+      App.rootContext.showMessage(
+        message: "Invalid file type: ${file.path.split(".").last}",
+      );
       return null;
     }
     return file;
@@ -311,33 +336,45 @@ Future<void> saveFile(
   }
 }
 
-Directory openDirectoryPlatform(String path) {
+class _IOOverrides extends IOOverrides {
+  @override
+  Directory createDirectory(String path) {
     if (App.isAndroid) {
       var dir = AndroidDirectory.fromPathSync(path);
       if (dir == null) {
-      return Directory(path);
+        return super.createDirectory(path);
       }
       return dir;
     } else {
-    return Directory(path);
+      return super.createDirectory(path);
     }
   }
 
-File openFilePlatform(String path) {
+  @override
+  File createFile(String path) {
     if (path.startsWith("file://")) {
       path = path.substring(7);
     }
     if (App.isAndroid) {
       var f = AndroidFile.fromPathSync(path);
       if (f == null) {
-      return File(path);
+        return super.createFile(path);
       }
       return f;
     } else {
-    return File(path);
+      return super.createFile(path);
     }
   }
 
+}
+
+T overrideIO<T>(T Function() f) {
+  return IOOverrides.runWithIOOverrides<T>(
+    f,
+    _IOOverrides(),
+  );
+}
+
 class Share {
   static void shareFile({
     required Uint8List data,

lib/utils/pdf.dart

@@ -0,0 +1,92 @@
+import 'dart:isolate';
+
+import 'package:pdf/widgets.dart';
+import 'package:venera/foundation/local.dart';
+import 'package:venera/utils/io.dart';
+
+Future<void> _createPdfFromComic({
+  required LocalComic comic,
+  required String savePath,
+  required String localPath,
+}) async {
+  final pdf = Document(
+    title: comic.title,
+    author: comic.subTitle ?? "",
+    producer: "Venera",
+  );
+
+  pdf.document.outline;
+
+  var baseDir = comic.directory.contains('/') || comic.directory.contains('\\')
+      ? comic.directory
+      : FilePath.join(localPath, comic.directory);
+
+  // add cover
+  var imageData = File(FilePath.join(baseDir, comic.cover)).readAsBytesSync();
+  pdf.addPage(Page(
+    build: (Context context) {
+      return Image(MemoryImage(imageData), fit: BoxFit.contain);
+    },
+  ));
+
+  bool multiChapters = comic.chapters != null;
+
+  void reorderFiles(List<FileSystemEntity> files) {
+    files.removeWhere(
+        (element) => element is! File || element.path.startsWith('cover'));
+    files.sort((a, b) {
+      var aName = (a as File).name;
+      var bName = (b as File).name;
+      var aNumber = int.tryParse(aName);
+      var bNumber = int.tryParse(bName);
+      if (aNumber != null && bNumber != null) {
+        return aNumber.compareTo(bNumber);
+      }
+      return aName.compareTo(bName);
+    });
+  }
+
+  if (!multiChapters) {
+    var files = Directory(baseDir).listSync();
+    reorderFiles(files);
+
+    for (var file in files) {
+      var imageData = (file as File).readAsBytesSync();
+      pdf.addPage(Page(
+        build: (Context context) {
+          return Image(MemoryImage(imageData), fit: BoxFit.contain);
+        },
+      ));
+    }
+  } else {
+    for (var chapter in comic.chapters!.keys) {
+      var files = Directory(FilePath.join(baseDir, chapter)).listSync();
+      reorderFiles(files);
+      for (var file in files) {
+        var imageData = (file as File).readAsBytesSync();
+        pdf.addPage(Page(
+          build: (Context context) {
+            return Image(MemoryImage(imageData), fit: BoxFit.contain);
+          },
+        ));
+      }
+    }
+  }
+
+  final file = File(savePath);
+  file.writeAsBytesSync(await pdf.save());
+}
+
+Future<void> createPdfFromComicIsolate({
+  required LocalComic comic,
+  required String savePath,
+}) async {
+  var localPath = LocalManager().path;
+  return Isolate.run(() => overrideIO(() async {
+        return await _createPdfFromComic(
+          comic: comic,
+          savePath: savePath,
+          localPath: localPath,
+        );
+      }));
+}

pubspec.lock

@@ -33,6 +33,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.0.4"
+  archive:
+    dependency: transitive
+    description:
+      name: archive
+      sha256: cb6a278ef2dbb298455e1a713bda08524a175630ec643a242c399c932a0a1f7d
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.6.1"
   args:
     dependency: transitive
     description:
@@ -49,6 +57,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.11.0"
+  barcode:
+    dependency: transitive
+    description:
+      name: barcode
+      sha256: ab180ce22c6555d77d45f0178a523669db67f95856e3378259ef2ffeb43e6003
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.8"
   battery_plus:
     dependency: "direct main"
     description:
@@ -65,6 +81,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.0.1"
+  bidi:
+    dependency: transitive
+    description:
+      name: bidi
+      sha256: "9a712c7ddf708f7c41b1923aa83648a3ed44cfd75b04f72d598c45e5be287f9d"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.12"
   boolean_selector:
     dependency: transitive
     description:
@@ -393,8 +417,8 @@ packages:
     dependency: "direct main"
     description:
       path: "."
-      ref: "829a566b738a26ea98e523807f49838e21308543"
+      ref: "3315082b9f7055655610e4f6f136b69e48228c05"
-      resolved-ref: "829a566b738a26ea98e523807f49838e21308543"
+      resolved-ref: "3315082b9f7055655610e4f6f136b69e48228c05"
       url: "https://github.com/pkuislm/flutter_saf.git"
     source: git
     version: "0.0.1"
@@ -465,6 +489,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "4.0.2"
+  image:
+    dependency: transitive
+    description:
+      name: image
+      sha256: f31d52537dc417fdcde36088fdf11d191026fd5e4fae742491ebd40e5a8bea7d
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.3.0"
   intl:
     dependency: "direct main"
     description:
@@ -626,6 +658,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.9.0"
+  path_parsing:
+    dependency: transitive
+    description:
+      name: path_parsing
+      sha256: "883402936929eac138ee0a45da5b0f2c80f89913e6dc3bf77eb65b84b409c6ca"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.0"
   path_provider:
     dependency: "direct main"
     description:
@@ -674,6 +714,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.3.0"
+  pdf:
+    dependency: "direct main"
+    description:
+      name: pdf
+      sha256: "05df53f8791587402493ac97b9869d3824eccbc77d97855f4545cf72df3cae07"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.11.1"
   petitparser:
     dependency: transitive
     description:
@@ -715,6 +763,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "3.9.1"
+  qr:
+    dependency: transitive
+    description:
+      name: qr
+      sha256: "5a1d2586170e172b8a8c8470bbbffd5eb0cd38a66c0d77155ea138d3af3a4445"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.2"
   rhttp:
     dependency: "direct main"
     description:

pubspec.yaml

@@ -2,7 +2,7 @@ name: venera
 description: "A comic app."
 publish_to: 'none'
 
-version: 1.0.7+107
+version: 1.0.8+108
 
 environment:
   sdk: '>=3.5.0 <4.0.0'
@@ -68,7 +68,8 @@ dependencies:
   flutter_saf:
     git: 
       url: https://github.com/pkuislm/flutter_saf.git
-      ref: dd5242918da0ea9a0a50b0f87ade7a2def65453d
+      ref: 3315082b9f7055655610e4f6f136b69e48228c05
+  pdf: ^3.11.1
 
 dev_dependencies:
   flutter_test: