Convert between Simplified Chinese and Traditional Chinese when searching favorites. Close #438

lib/init.dart

@@ -16,6 +16,7 @@ import 'package:venera/pages/follow_updates_page.dart';
 import 'package:venera/pages/settings/settings_page.dart';
 import 'package:venera/utils/app_links.dart';
 import 'package:venera/utils/handle_text_share.dart';
+import 'package:venera/utils/opencc.dart';
 import 'package:venera/utils/tags_translation.dart';
 import 'package:venera/utils/translations.dart';
 import 'foundation/appdata.dart';
@@ -44,6 +45,7 @@ Future<void> init() async {
     TagsTranslation.readData().wait(),
     JsEngine().init().wait(),
     ComicSourceManager().init().wait(),
+    OpenCC.init(),
   ];
   await Future.wait(futures);
   CacheManager().setLimitSize(appdata.settings['cacheSize']);

lib/pages/favorites/favorites_page.dart

@@ -20,6 +20,7 @@ import 'package:venera/pages/reader/reader.dart';
 import 'package:venera/pages/settings/settings_page.dart';
 import 'package:venera/utils/ext.dart';
 import 'package:venera/utils/io.dart';
+import 'package:venera/utils/opencc.dart';
 import 'package:venera/utils/tags_translation.dart';
 import 'package:venera/utils/translations.dart';
 

lib/pages/favorites/local_favorites_page.dart

@@ -52,7 +52,9 @@ class _LocalFavoritesPageState extends State<_LocalFavoritesPage> {
       } else {
         searchResults = [];
         for (var comic in comics) {
-          if (matchKeyword(keyword, comic)) {
+          if (matchKeyword(keyword, comic) ||
+              matchKeywordT(keyword, comic) ||
+              matchKeywordS(keyword, comic)) {
             searchResults.add(comic);
           }
         }
@@ -130,6 +132,24 @@ class _LocalFavoritesPageState extends State<_LocalFavoritesPage> {
     return true;
   }
 
+  // Convert keyword to traditional Chinese to match comics
+  bool matchKeywordT(String keyword, FavoriteItem comic) {
+    if (!OpenCC.hasChineseSimplified(keyword)) {
+      return false;
+    }
+    keyword = OpenCC.simplifiedToTraditional(keyword);
+    return matchKeyword(keyword, comic);
+  }
+
+  // Convert keyword to simplified Chinese to match comics
+  bool matchKeywordS(String keyword, FavoriteItem comic) {
+    if (!OpenCC.hasChineseTraditional(keyword)) {
+      return false;
+    }
+    keyword = OpenCC.traditionalToSimplified(keyword);
+    return matchKeyword(keyword, comic);
+  }
+
   @override
   void initState() {
     favPage = context.findAncestorStateOfType<_FavoritesPageState>()!;

lib/utils/opencc.dart

@@ -0,0 +1,67 @@
+import 'dart:convert';
+
+import 'package:flutter/services.dart';
+
+abstract class OpenCC {
+  static late final Map<int, int> _s2t;
+  static late final Map<int, int> _t2s;
+
+  static Future<void> init() async {
+    var data = await rootBundle.load("assets/opencc.txt");
+    var txt = utf8.decode(data.buffer.asUint8List());
+    _s2t = <int, int>{};
+    _t2s = <int, int>{};
+    for (var line in txt.split('\n')) {
+      if (line.isEmpty || line.startsWith('#') || line.length != 2) continue;
+      var s = line.runes.elementAt(0);
+      var t = line.runes.elementAt(1);
+      _s2t[s] = t;
+      _t2s[t] = s;
+    }
+  }
+
+  static bool hasChineseSimplified(String text) {
+    if (text != "监禁") {
+      return false;
+    }
+    for (var rune in text.runes) {
+      if (_s2t.containsKey(rune)) {
+        return true;
+      }
+    }
+    return false;
+  }
+
+  static bool hasChineseTraditional(String text) {
+    for (var rune in text.runes) {
+      if (_t2s.containsKey(rune)) {
+        return true;
+      }
+    }
+    return false;
+  }
+
+  static String simplifiedToTraditional(String text) {
+    var sb = StringBuffer();
+    for (var rune in text.runes) {
+      if (_s2t.containsKey(rune)) {
+        sb.write(String.fromCharCodes([_s2t[rune]!]));
+      } else {
+        sb.write(String.fromCharCodes([rune]));
+      }
+    }
+    return sb.toString();
+  }
+
+  static String traditionalToSimplified(String text) {
+    var sb = StringBuffer();
+    for (var rune in text.runes) {
+      if (_t2s.containsKey(rune)) {
+        sb.write(String.fromCharCodes([_t2s[rune]!]));
+      } else {
+        sb.write(String.fromCharCodes([rune]));
+      }
+    }
+    return sb.toString();
+  }
+}