checkpoint

lib/theme/models/scale_scheme.dart

@@ -0,0 +1,53 @@
+import 'package:flutter/material.dart';
+
+import 'scale_color.dart';
+
+class ScaleScheme extends ThemeExtension<ScaleScheme> {
+  ScaleScheme(
+      {required this.primaryScale,
+      required this.primaryAlphaScale,
+      required this.secondaryScale,
+      required this.tertiaryScale,
+      required this.grayScale,
+      required this.errorScale});
+
+  final ScaleColor primaryScale;
+  final ScaleColor primaryAlphaScale;
+  final ScaleColor secondaryScale;
+  final ScaleColor tertiaryScale;
+  final ScaleColor grayScale;
+  final ScaleColor errorScale;
+
+  @override
+  ScaleScheme copyWith(
+          {ScaleColor? primaryScale,
+          ScaleColor? primaryAlphaScale,
+          ScaleColor? secondaryScale,
+          ScaleColor? tertiaryScale,
+          ScaleColor? grayScale,
+          ScaleColor? errorScale}) =>
+      ScaleScheme(
+        primaryScale: primaryScale ?? this.primaryScale,
+        primaryAlphaScale: primaryAlphaScale ?? this.primaryAlphaScale,
+        secondaryScale: secondaryScale ?? this.secondaryScale,
+        tertiaryScale: tertiaryScale ?? this.tertiaryScale,
+        grayScale: grayScale ?? this.grayScale,
+        errorScale: errorScale ?? this.errorScale,
+      );
+
+  @override
+  ScaleScheme lerp(ScaleScheme? other, double t) {
+    if (other is! ScaleScheme) {
+      return this;
+    }
+    return ScaleScheme(
+      primaryScale: ScaleColor.lerp(primaryScale, other.primaryScale, t),
+      primaryAlphaScale:
+          ScaleColor.lerp(primaryAlphaScale, other.primaryAlphaScale, t),
+      secondaryScale: ScaleColor.lerp(secondaryScale, other.secondaryScale, t),
+      tertiaryScale: ScaleColor.lerp(tertiaryScale, other.tertiaryScale, t),
+      grayScale: ScaleColor.lerp(grayScale, other.grayScale, t),
+      errorScale: ScaleColor.lerp(errorScale, other.errorScale, t),
+    );
+  }
+}