feat: pure black theme

Closes #254

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

lib/utils/extension.dart

@@ -97,3 +97,21 @@ extension Unique<E, Id> on List<E> {
     return list;
   }
 }
+
+extension ColorExtension on Color {
+  Color darken([double amount = .5]) {
+    assert(amount >= 0 && amount <= 1, 'Amount must be between 0 and 1');
+    return Color.lerp(this, Colors.black, amount)!;
+  }
+
+  Color blend(Color color, [double fraction = 0.5]) {
+    assert(fraction >= 0 && fraction <= 1, 'Fraction must be between 0 and 1');
+    final blendedRed = (red * (1 - fraction) + color.red * fraction).toInt();
+    final blendedGreen =
+        (green * (1 - fraction) + color.green * fraction).toInt();
+    final blendedBlue = (blue * (1 - fraction) + color.blue * fraction).toInt();
+    final blendedAlpha =
+        (alpha * (1 - fraction) + color.alpha * fraction).toInt();
+    return Color.fromARGB(blendedAlpha, blendedRed, blendedGreen, blendedBlue);
+  }
+}

lib/utils/storage.dart

@@ -367,6 +367,9 @@ class GStorage {
   static bool get coinWithLike =>
       GStorage.setting.get(SettingBoxKey.coinWithLike, defaultValue: false);
 
+  static bool get isPureBlackTheme =>
+      GStorage.setting.get(SettingBoxKey.isPureBlackTheme, defaultValue: false);
+
   static List<double> get dynamicDetailRatio => List<double>.from(setting
       .get(SettingBoxKey.dynamicDetailRatio, defaultValue: [60.0, 40.0]));
 
@@ -599,6 +602,7 @@ class SettingBoxKey {
       showDmChart = 'showDmChart',
       enableCommAntifraud = 'enableCommAntifraud',
       coinWithLike = 'coinWithLike',
+      isPureBlackTheme = 'isPureBlackTheme',
 
       // Sponsor Block
       enableSponsorBlock = 'enableSponsorBlock',

lib/utils/utils.dart

@@ -44,6 +44,56 @@ class Utils {
 
   static const channel = MethodChannel("PiliPlus");
 
+  static darkenTheme(ThemeData themeData) {
+    // return themeData;
+    Color color = themeData.colorScheme.surfaceContainerHighest.darken(0.7);
+    return themeData.copyWith(
+      scaffoldBackgroundColor: Colors.black,
+      appBarTheme: themeData.appBarTheme.copyWith(
+        backgroundColor: Colors.black,
+      ),
+      cardTheme: themeData.cardTheme.copyWith(
+        color: Colors.black,
+      ),
+      dialogTheme: themeData.dialogTheme.copyWith(
+        backgroundColor: color,
+      ),
+      bottomSheetTheme:
+          themeData.bottomSheetTheme.copyWith(backgroundColor: color),
+      bottomNavigationBarTheme:
+          themeData.bottomNavigationBarTheme.copyWith(backgroundColor: color),
+      navigationBarTheme:
+          themeData.navigationBarTheme.copyWith(backgroundColor: color),
+      navigationRailTheme:
+          themeData.navigationRailTheme.copyWith(backgroundColor: Colors.black),
+      colorScheme: themeData.colorScheme.copyWith(
+        primary: themeData.colorScheme.primary.darken(0.1),
+        onPrimary: themeData.colorScheme.onPrimary.darken(0.1),
+        primaryContainer: themeData.colorScheme.primaryContainer.darken(0.1),
+        onPrimaryContainer:
+            themeData.colorScheme.onPrimaryContainer.darken(0.1),
+        inversePrimary: themeData.colorScheme.inversePrimary.darken(0.1),
+        secondary: themeData.colorScheme.secondary.darken(0.1),
+        onSecondary: themeData.colorScheme.onSecondary.darken(0.1),
+        secondaryContainer:
+            themeData.colorScheme.secondaryContainer.darken(0.1),
+        onSecondaryContainer:
+            themeData.colorScheme.onSecondaryContainer.darken(0.1),
+        error: themeData.colorScheme.error.darken(0.1),
+        surface: Colors.black,
+        onSurface: themeData.colorScheme.onSurface.darken(0.15),
+        surfaceTint: themeData.colorScheme.surfaceTint.darken(),
+        inverseSurface: themeData.colorScheme.inverseSurface.darken(),
+        onInverseSurface: themeData.colorScheme.onInverseSurface.darken(),
+        surfaceContainer: themeData.colorScheme.surfaceContainer.darken(),
+        surfaceContainerHigh:
+            themeData.colorScheme.surfaceContainerHigh.darken(),
+        surfaceContainerHighest:
+            themeData.colorScheme.surfaceContainerHighest.darken(0.4),
+      ),
+    );
+  }
+
   static void onCopyOrMove({
     required BuildContext context,
     required bool isCopy,