selfprivacy.org.app/lib/theming/factory/app_theme_factory.dart
2022-05-17 01:41:00 +03:00

84 lines
2.5 KiB
Dart

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 bool isDark, required Color fallbackColor}) {
return _createAppTheme(
isDark: isDark,
fallbackColor: fallbackColor,
);
}
static Future<ThemeData> _createAppTheme({
bool isDark: false,
required Color fallbackColor,
}) async {
ColorScheme? gtkColorsScheme;
var brightness = isDark ? Brightness.dark : Brightness.light;
final dynamicColorsScheme = await _getDynamicColors(brightness);
if (Platform.isLinux) {
GtkThemeData themeData = await GtkThemeData.initialize();
final isGtkDark =
Color(themeData.theme_base_color).computeLuminance() < 0.5;
final isInverseNeeded = isGtkDark != isDark;
gtkColorsScheme = ColorScheme.fromSeed(
seedColor: Color(themeData.theme_selected_bg_color),
brightness: brightness,
background: isInverseNeeded
? Color(themeData.theme_base_color)
: Color(themeData.theme_bg_color),
surface: isInverseNeeded
? Color(themeData.theme_bg_color)
: Color(themeData.theme_base_color),
);
}
final accentColor = await SystemAccentColor(fallbackColor)
..load();
final fallbackColorScheme = ColorScheme.fromSeed(
seedColor: accentColor.accent,
brightness: brightness,
);
final colorScheme =
dynamicColorsScheme ?? gtkColorsScheme ?? fallbackColorScheme;
final appTypography = Typography.material2021();
final materialThemeData = ThemeData(
colorScheme: colorScheme,
brightness: colorScheme.brightness,
typography: appTypography,
useMaterial3: true,
scaffoldBackgroundColor: colorScheme.background,
appBarTheme: AppBarTheme(
elevation: 0,
backgroundColor: colorScheme.primary,
foregroundColor: colorScheme.onPrimary,
),
);
return materialThemeData;
}
static Future<ColorScheme?> _getDynamicColors(Brightness brightness) {
try {
return DynamicColorPlugin.getCorePalette().then(
(corePallet) => corePallet?.toColorScheme(brightness: brightness));
} on PlatformException {
return Future.value(null);
}
}
}