selfprivacy.org.app/lib/theming/factory/app_theme_factory.dart

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import 'dart:io';
import 'package:dynamic_color/dynamic_color.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:system_theme/system_theme.dart';
import 'package:gtk_theme_fl/gtk_theme_fl.dart';
abstract class AppThemeFactory {
AppThemeFactory._();
static Future<ThemeData> create({
required final bool isDark,
required final Color fallbackColor,
}) =>
_createAppTheme(
isDark: isDark,
fallbackColor: fallbackColor,
);
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static Future<ThemeData> _createAppTheme({
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required final Color fallbackColor,
final bool isDark = false,
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}) async {
ColorScheme? gtkColorsScheme;
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final Brightness brightness = isDark ? Brightness.dark : Brightness.light;
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final ColorScheme? dynamicColorsScheme =
await _getDynamicColors(brightness);
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if (Platform.isLinux) {
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final GtkThemeData themeData = await GtkThemeData.initialize();
final bool isGtkDark =
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Color(themeData.theme_bg_color).computeLuminance() < 0.5;
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final bool isInverseNeeded = isGtkDark != isDark;
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gtkColorsScheme = ColorScheme.fromSeed(
seedColor: Color(themeData.theme_selected_bg_color),
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brightness: brightness,
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background: isInverseNeeded ? null : Color(themeData.theme_bg_color),
surface: isInverseNeeded ? null : Color(themeData.theme_base_color),
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);
}
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final SystemAccentColor accentColor = SystemAccentColor(fallbackColor);
try {
await accentColor.load();
} on MissingPluginException catch (e) {
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print('_createAppTheme: ${e.message}');
}
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final ColorScheme fallbackColorScheme = ColorScheme.fromSeed(
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seedColor: accentColor.accent,
brightness: brightness,
);
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final ColorScheme colorScheme =
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dynamicColorsScheme ?? gtkColorsScheme ?? fallbackColorScheme;
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final Typography appTypography = Typography.material2021();
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final ThemeData materialThemeData = ThemeData(
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colorScheme: colorScheme,
brightness: colorScheme.brightness,
typography: appTypography,
useMaterial3: true,
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scaffoldBackgroundColor: colorScheme.background,
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appBarTheme: AppBarTheme(
elevation: 0,
backgroundColor: colorScheme.primary,
foregroundColor: colorScheme.onPrimary,
),
);
return materialThemeData;
}
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static Future<ColorScheme?> _getDynamicColors(final Brightness brightness) {
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try {
return DynamicColorPlugin.getCorePalette().then(
(final corePallet) => corePallet?.toColorScheme(brightness: brightness),
);
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} on PlatformException {
return Future.value(null);
}
}
}