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公云存储
2026-05-15 08:52:48 +08:00
parent 4131f7321a
commit eb35a1d067
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lib/presentation/providers/theme_provider.dart
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import 'dart:io';
import 'package:flutter/material.dart';
import '../../services/storage_service.dart';
/// 主题模式
enum AppThemeMode {
light,
dark,
system,
}
/// 主题Provider - 管理主题模式和主题色
class ThemeProvider extends ChangeNotifier {
AppThemeMode _themeMode = AppThemeMode.system;
Color _seedColor = const Color(0xFF3B82F6);
static const Color lightScaffoldBg = Color(0xFFF8FAFC);
static const Color darkScaffoldBg = Color(0xFF0F172A);
AppThemeMode get themeMode => _themeMode;
Color get seedColor => _seedColor;
bool get isDark => _themeMode == AppThemeMode.dark;
/// 初始化
Future<void> init() async {
await Future.wait([
loadThemeMode(),
loadSeedColor(),
]);
}
/// 加载主题模式
Future<void> loadThemeMode() async {
final savedMode = await StorageService.instance.themeMode;
if (savedMode != null) {
switch (savedMode) {
case 'light':
_themeMode = AppThemeMode.light;
case 'dark':
_themeMode = AppThemeMode.dark;
default:
_themeMode = AppThemeMode.system;
}
}
notifyListeners();
}
/// 加载主题色
Future<void> loadSeedColor() async {
final saved = await StorageService.instance.getString('theme_seed_color');
if (saved != null && saved.isNotEmpty) {
final color = _colorFromHex(saved);
if (color != null) {
_seedColor = color;
notifyListeners();
}
}
}
/// 设置主题模式
Future<void> setThemeMode(AppThemeMode mode) async {
_themeMode = mode;
notifyListeners();
String modeString;
switch (mode) {
case AppThemeMode.light:
modeString = 'light';
case AppThemeMode.dark:
modeString = 'dark';
case AppThemeMode.system:
modeString = 'system';
}
await StorageService.instance.setThemeMode(modeString);
}
/// 设置主题色
Future<void> setSeedColor(Color color) async {
_seedColor = color;
notifyListeners();
await StorageService.instance.setString('theme_seed_color', _colorToHex(color));
}
/// 切换主题
Future<void> toggleTheme() async {
final newMode = isDark ? AppThemeMode.light : AppThemeMode.dark;
await setThemeMode(newMode);
}
/// 构建亮色主题
ThemeData buildLightTheme() {
return _buildTheme(Brightness.light);
}
/// 构建暗色主题
ThemeData buildDarkTheme() {
return _buildTheme(Brightness.dark);
}
ThemeData _buildTheme(Brightness brightness) {
final isLight = brightness == Brightness.light;
final colorScheme = ColorScheme.fromSeed(
seedColor: _seedColor,
brightness: brightness,
);
final bodyColor = isLight ? Colors.black87 : Colors.white;
final displayColor = isLight ? Colors.black87 : Colors.white;
final baseTextTheme = ThemeData(brightness: brightness).textTheme;
var textTheme = baseTextTheme.apply(
bodyColor: bodyColor,
displayColor: displayColor,
fontFamily: _getPlatformFont(),
);
if (_getPlatformFont() == 'NotoSansSC') {
textTheme = textTheme.copyWith(
bodyLarge: textTheme.bodyLarge?.copyWith(fontWeight: FontWeight.w500),
bodyMedium: textTheme.bodyMedium?.copyWith(fontWeight: FontWeight.w500),
bodySmall: textTheme.bodySmall?.copyWith(fontWeight: FontWeight.w500),
titleLarge: textTheme.titleLarge?.copyWith(fontWeight: FontWeight.w700),
titleMedium: textTheme.titleMedium?.copyWith(fontWeight: FontWeight.w500),
titleSmall: textTheme.titleSmall?.copyWith(fontWeight: FontWeight.w500),
labelLarge: textTheme.labelLarge?.copyWith(fontWeight: FontWeight.w700),
);
}
return ThemeData(
textTheme: textTheme,
useMaterial3: true,
colorScheme: colorScheme,
scaffoldBackgroundColor: isLight ? lightScaffoldBg : darkScaffoldBg,
appBarTheme: AppBarTheme(
centerTitle: true,
elevation: 0,
scrolledUnderElevation: 0,
backgroundColor: isLight
? lightScaffoldBg.withValues(alpha: 0.85)
: darkScaffoldBg.withValues(alpha: 0.85),
surfaceTintColor: Colors.transparent,
foregroundColor: isLight ? Colors.black87 : Colors.white,
),
cardTheme: CardThemeData(
elevation: 0,
shadowColor: Colors.black12,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(12),
side: BorderSide(
color: isLight
? Colors.black.withValues(alpha: 0.06)
: Colors.white.withValues(alpha: 0.08),
),
),
color: isLight ? Colors.white : const Color(0xFF1E293B),
),
inputDecorationTheme: InputDecorationTheme(
filled: true,
border: OutlineInputBorder(
borderRadius: BorderRadius.circular(12),
borderSide: BorderSide.none,
),
enabledBorder: OutlineInputBorder(
borderRadius: BorderRadius.circular(12),
borderSide: BorderSide.none,
),
focusedBorder: OutlineInputBorder(
borderRadius: BorderRadius.circular(12),
borderSide: BorderSide.none,
),
contentPadding: const EdgeInsets.symmetric(
horizontal: 16,
vertical: 16,
),
),
elevatedButtonTheme: ElevatedButtonThemeData(
style: ElevatedButton.styleFrom(
padding: const EdgeInsets.symmetric(
horizontal: 24,
vertical: 12,
),
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(12),
),
),
),
floatingActionButtonTheme: FloatingActionButtonThemeData(
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(16),
),
),
chipTheme: ChipThemeData(
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(8),
),
),
dialogTheme: DialogThemeData(
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(16),
),
),
bottomSheetTheme: const BottomSheetThemeData(
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.vertical(
top: Radius.circular(16),
),
),
),
navigationBarTheme: NavigationBarThemeData(
elevation: 0,
backgroundColor: isLight
? lightScaffoldBg.withValues(alpha: 0.9)
: darkScaffoldBg.withValues(alpha: 0.9),
indicatorColor: colorScheme.primary.withValues(alpha: 0.12),
labelBehavior: NavigationDestinationLabelBehavior.alwaysShow,
),
navigationRailTheme: NavigationRailThemeData(
elevation: 0,
backgroundColor: isLight
? lightScaffoldBg
: darkScaffoldBg,
indicatorColor: colorScheme.primary.withValues(alpha: 0.12),
),
);
}
/// Color → hex string (不含alpha)
static String _colorToHex(Color color) {
return '#${color.toARGB32().toRadixString(16).padLeft(8, '0').substring(2)}';
}
/// hex string → Color
static Color? _colorFromHex(String hex) {
final clean = hex.replaceFirst('#', '');
if (clean.length == 6) {
return Color(int.parse('FF$clean', radix: 16));
}
if (clean.length == 8) {
return Color(int.parse(clean, radix: 16));
}
return null;
}
String? _getPlatformFont() {
if (Platform.isWindows || Platform.isLinux) return 'NotoSansSC';
if (Platform.isMacOS) return 'PingFang SC';
return null;
}
}