Extract fl_lib to avoid bloating

lib/app.dart

@@ -1,12 +1,13 @@
 import 'dart:async';
 
-import 'package:fl_lib/fl_lib.dart' as fl;
-import 'package:fl_lib/fl_lib.dart' show ChineseThemeData;
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 import 'package:window_manager/window_manager.dart';
+
 import 'constants/app_branding.dart';
 import 'generated/l10n/l10n.dart';
+import 'kit/kit.dart' as kit;
+import 'kit/kit.dart' show ChineseThemeData;
 import 'models/aria2_instance.dart';
 import 'models/settings.dart';
 import 'pages/download_page/download_page.dart';
@@ -53,14 +54,30 @@ class _ThemeProviderState extends State<_ThemeProvider> {
 
   @override
   Widget build(BuildContext context) {
-    final display = context.select<Settings, ({Locale? locale, bool hideTitleBar, Color primaryColor, ThemeMode themeMode})>((s) => (locale: s.locale, hideTitleBar: s.hideTitleBar, primaryColor: s.primaryColor, themeMode: s.themeMode));
+    final display = context
+        .select<
+          Settings,
+          ({
+            Locale? locale,
+            bool hideTitleBar,
+            Color primaryColor,
+            ThemeMode themeMode,
+          })
+        >(
+          (s) => (
+            locale: s.locale,
+            hideTitleBar: s.hideTitleBar,
+            primaryColor: s.primaryColor,
+            themeMode: s.themeMode,
+          ),
+        );
 
     return MaterialApp(
       title: kAppName,
       locale: display.locale,
       localizationsDelegates: AppLocalizations.localizationsDelegates,
       supportedLocales: AppLocalizations.supportedLocales,
-      builder: (context, child) => fl.VirtualWindowFrame(
+      builder: (context, child) => kit.VirtualWindowFrame(
         title: kAppName,
         showCaption: display.hideTitleBar,
         child: ClipRect(child: child ?? const SizedBox.shrink()),
@@ -203,7 +220,7 @@ class _HomeWrapperState extends State<_HomeWrapper> with Loggable {
   @override
   Widget build(BuildContext context) {
     if (!_isInitialized) {
-      return Scaffold(body: Center(child: fl.SizedLoading.medium));
+      return Scaffold(body: Center(child: kit.SizedLoading.medium));
     }
     return const MainWindow();
   }
@@ -552,8 +569,7 @@ class _MainWindowState extends State<MainWindow> with WindowListener, Loggable {
       connectedCount == 0
           ? l10n.notConnected
           : '${l10n.connected}: $connectedCount',
-      if (settings.showTraySpeed)
-        l10n.totalSpeed(formatSpeed(summary.speed)),
+      if (settings.showTraySpeed) l10n.totalSpeed(formatSpeed(summary.speed)),
       l10n.activeTasks(summary.active.toString()),
       l10n.waitingTasks(summary.waiting.toString()),
     ];
@@ -902,7 +918,7 @@ class _MainWindowState extends State<MainWindow> with WindowListener, Loggable {
 }
 
 ({int active, int waiting, int resumable, int pausable, int speed})
-    _computeTaskSummary(List<DownloadTask> tasks) {
+_computeTaskSummary(List<DownloadTask> tasks) {
   var active = 0;
   var waiting = 0;
   var resumable = 0;
@@ -940,9 +956,13 @@ class _StatusBar extends StatelessWidget {
   Widget build(BuildContext context) {
     final l10n = AppLocalizations.of(context)!;
     final colorScheme = Theme.of(context).colorScheme;
-    final summary = context.select<DownloadDataService, ({int active, int waiting, int resumable, int pausable, int speed})>((service) {
-      return _computeTaskSummary(service.tasks);
-    });
+    final summary = context
+        .select<
+          DownloadDataService,
+          ({int active, int waiting, int resumable, int pausable, int speed})
+        >((service) {
+          return _computeTaskSummary(service.tasks);
+        });
 
     return Container(
       padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
@@ -967,28 +987,19 @@ class _StatusBar extends StatelessWidget {
             label: Text(l10n.totalSpeed(formatSpeed(summary.speed))),
             avatar: const Icon(Icons.speed, size: 16),
             backgroundColor: colorScheme.surfaceContainerHighest,
-            padding: const EdgeInsets.symmetric(
-              horizontal: 8,
-              vertical: 6,
-            ),
+            padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 6),
           ),
           Chip(
             label: Text(l10n.activeTasks(summary.active.toString())),
             avatar: const Icon(Icons.task_alt, size: 16),
             backgroundColor: colorScheme.surfaceContainerHighest,
-            padding: const EdgeInsets.symmetric(
-              horizontal: 8,
-              vertical: 6,
-            ),
+            padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 6),
           ),
           Chip(
             label: Text(l10n.waitingTasks(summary.waiting.toString())),
             avatar: const Icon(Icons.pending, size: 16),
             backgroundColor: colorScheme.surfaceContainerHighest,
-            padding: const EdgeInsets.symmetric(
-              horizontal: 8,
-              vertical: 6,
-            ),
+            padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 6),
           ),
         ],
       ),

lib/kit/core/build.dart

@@ -0,0 +1,21 @@
+enum BuildMode {
+  release,
+  debug,
+  profile;
+
+  static final isDebug = _buildMode == BuildMode.debug;
+  static final isProfile = _buildMode == BuildMode.profile;
+  static final isRelease = _buildMode == BuildMode.release;
+}
+
+final _buildMode = () {
+  if (const bool.fromEnvironment('dart.vm.product')) {
+    return BuildMode.release;
+  }
+  var result = BuildMode.profile;
+  assert(() {
+    result = BuildMode.debug;
+    return true;
+  }());
+  return result;
+}();

lib/kit/core/ext/datetime.dart

@@ -0,0 +1,7 @@
+extension DateTimeX on DateTime {
+  String get hourMinute {
+    return '${hour.toString().padLeft(2, '0')}:${minute.toString().padLeft(2, '0')}';
+  }
+
+  static int get timestamp => DateTime.now().millisecondsSinceEpoch;
+}

lib/kit/core/ext/obj.dart

@@ -0,0 +1,13 @@
+import '../rnode.dart';
+
+extension ObjectX<T extends Object> on T {
+  VNode<T> get vn => VNode<T>(this);
+}
+
+extension ObjectXNullable<T extends Object> on T? {
+  A? nullOr<A>(A Function(T) f) => this != null ? f(this!) : null;
+
+  VNode<T?> get vn => VNode<T?>(this);
+}
+
+VNode<T?> nvn<T>() => VNode<T?>(null);

lib/kit/core/ext/string.dart

@@ -0,0 +1,7 @@
+import 'package:url_launcher/url_launcher_string.dart';
+
+extension StringX on String {
+  Future<bool> launchUrl() async {
+    return await launchUrlString(this);
+  }
+}

lib/kit/core/ext/widget.dart

@@ -0,0 +1,21 @@
+import 'package:flutter/material.dart';
+
+extension WidgetX on Widget {
+  Widget paddingAll(double value) =>
+      Padding(padding: EdgeInsets.all(value), child: this);
+
+  Widget paddingOnly({
+    double left = 0,
+    double top = 0,
+    double right = 0,
+    double bottom = 0,
+  }) => Padding(
+    padding: EdgeInsets.only(
+      left: left,
+      top: top,
+      right: right,
+      bottom: bottom,
+    ),
+    child: this,
+  );
+}

lib/kit/core/func.dart

@@ -0,0 +1,23 @@
+import 'dart:async';
+
+abstract final class Fns {
+  static const _defaultDurationTime = 377;
+  static const _defaultThrottleId = 'default';
+  static final startTimeMap = <String, int>{_defaultThrottleId: 0};
+
+  static FutureOr<T?> throttle<T>(
+    FutureOr<T> Function() func, {
+    String id = _defaultThrottleId,
+    int duration = _defaultDurationTime,
+    void Function()? continueClick,
+  }) async {
+    final currentTime = DateTime.now().millisecondsSinceEpoch;
+    if (currentTime - (startTimeMap[id] ?? 0) > duration) {
+      startTimeMap[id] = DateTime.now().millisecondsSinceEpoch;
+      return await func();
+    } else {
+      continueClick?.call();
+      return null;
+    }
+  }
+}

lib/kit/core/logger.dart

@@ -0,0 +1,65 @@
+import 'dart:io';
+
+import 'package:logging/logging.dart';
+
+import 'build.dart';
+
+abstract final class Loggers {
+  static final root = Logger('Root');
+  static final store = Logger('Store');
+  static final route = Logger('Route');
+  static final app = Logger('App');
+
+  static final sourceReg = RegExp(r'\((.+):(\d+):(\d+)\)');
+
+  static void log(Object message, {int skipFrames = 1}) {
+    final traceLines = StackTrace.current.toString().split('\n');
+
+    if (traceLines.length > skipFrames) {
+      final caller = traceLines[skipFrames];
+      final match = sourceReg.firstMatch(caller);
+      if (match != null) {
+        String? file = match.group(1)?.replaceFirst('file://', '');
+        final line = match.group(2);
+        if (file != null) {
+          final pwd = Directory.current.path;
+          if (file.startsWith(pwd)) {
+            file = file.substring(pwd.length + 1);
+            file = './$file';
+          }
+        }
+        print('[$file:$line] $message');
+        return;
+      }
+    }
+    print(message);
+  }
+}
+
+void dprint(Object? msg, [Object? msg2, Object? msg3, Object? msg4]) {
+  if (!BuildMode.isDebug) return;
+  lprint(msg, msg2, msg3, msg4, 3);
+}
+
+void lprint(
+  Object? msg, [
+  Object? msg2,
+  Object? msg3,
+  Object? msg4,
+  int skipFrames = 2,
+]) {
+  final sb = StringBuffer();
+  sb.write(msg.toString());
+
+  if (msg2 != null) {
+    sb.write('\n$msg2');
+    if (msg3 != null) {
+      sb.write('\n$msg3');
+      if (msg4 != null) {
+        sb.write('\n$msg4');
+      }
+    }
+  }
+  final str = sb.toString();
+  Loggers.log(str, skipFrames: skipFrames);
+}

lib/kit/core/platform.dart

@@ -0,0 +1,49 @@
+import 'dart:io';
+
+import 'package:flutter/foundation.dart';
+
+enum Pfs {
+  android,
+  ios,
+  linux,
+  macos,
+  windows,
+  web,
+  fuchsia,
+  unknown;
+
+  static final type = () {
+    if (kIsWeb) return web;
+    return switch (Platform.operatingSystem) {
+      'android' => android,
+      'ios' => ios,
+      'linux' => linux,
+      'macos' => macos,
+      'windows' => windows,
+      'fuchsia' => fuchsia,
+      _ => unknown,
+    };
+  }();
+
+  static final String separator = isWindows ? '\\' : '/';
+
+  static final String? homeDir = () {
+    final envVars = Platform.environment;
+    if (isMacOS || isLinux) {
+      return envVars['HOME'];
+    } else if (isWindows) {
+      return envVars['UserProfile'];
+    }
+    return null;
+  }();
+}
+
+final isAndroid = Pfs.type == Pfs.android;
+final isIOS = Pfs.type == Pfs.ios;
+final isLinux = Pfs.type == Pfs.linux;
+final isMacOS = Pfs.type == Pfs.macos;
+final isWindows = Pfs.type == Pfs.windows;
+final isWeb = Pfs.type == Pfs.web;
+final isMobile = Pfs.type == Pfs.ios || Pfs.type == Pfs.android;
+final isDesktop =
+    Pfs.type == Pfs.linux || Pfs.type == Pfs.macos || Pfs.type == Pfs.windows;