color scheme generation via FCS for m3e expressive

build_color_schemes.dart

// Copyright 2025 Fredrick Allan Grott. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// ignore_for_file: avoid_redundant_argument_values

import 'package:flex_color_scheme/flex_color_scheme.dart';
import 'package:flutter/material.dart';

/// schemeLight in conjunction with DesignSystemColorScheme enforce
/// Material 3 Expressive spec. In the custom build dynamic color block
/// in the declared MaterialApp widget the parameters of schemeLight are
/// filled in by the field references in DesignSystemColorScheme class.
///
/// @author Fredrick Allan Grott
ColorScheme schemeLight(
  Color primary,
  double contrast,
  FlexSchemeVariant variant, [
  Color? secondary,
  Color? tertiary,
]) => SeedColorScheme.fromSeeds(
  brightness: Brightness.light,

  primaryKey: primary,

  secondaryKey: secondary,

  tertiaryKey: tertiary,

  variant: variant,

  contrastLevel: contrast,

  useExpressiveOnContainerColors: true,
);

// schemeLightHighContrast in conjunction with DesignSystemColorScheme enforce
/// Material 3 Expressive spec. In the custom build dynamic color block
/// in the declared MaterialApp widget the parameters of schemeLight are
/// filled in by the field references in DesignSystemColorScheme class.
///
/// @author Fredrick Allan Grott
ColorScheme schemeLightHighContrast(
  Color primary,
  double contrast,
  FlexSchemeVariant variant, [
  Color? secondary,
  Color? tertiary,
]) => SeedColorScheme.fromSeeds(
  brightness: Brightness.light,

  primaryKey: primary,

  secondaryKey: secondary,

  tertiaryKey: tertiary,

  variant: variant,

  contrastLevel: contrast,

  useExpressiveOnContainerColors: true,
);

// schemeDark in conjunction with DesignSystemColorScheme enforce
/// Material 3 Expressive spec. In the custom build dynamic color block
/// in the declared MaterialApp widget the parameters of schemeLight are
/// filled in by the field references in DesignSystemColorScheme class.
///
/// @author Fredrick Allan Grott
ColorScheme schemeDark(
  Color primary,
  double contrast,
  FlexSchemeVariant variant, [
  Color? secondary,
  Color? tertiary,
]) => SeedColorScheme.fromSeeds(
  brightness: Brightness.dark,

  primaryKey: primary,

  secondaryKey: secondary,

  tertiaryKey: tertiary,

  variant: variant,

  contrastLevel: contrast,

  useExpressiveOnContainerColors: true,
);

// schemeDarkHighContrast in conjunction with DesignSystemColorScheme enforce
/// Material 3 Expressive spec. In the custom build dynamic color block
/// in the declared MaterialApp widget the parameters of schemeLight are
/// filled in by the field references in DesignSystemColorScheme class.
///
/// @author Fredrick Allan Grott
ColorScheme schemeDarkHighContrast(
  Color primary,
  double contrast,
  FlexSchemeVariant variant, [
  Color? secondary,
  Color? tertiary,
]) => SeedColorScheme.fromSeeds(
  brightness: Brightness.dark,

  primaryKey: primary,

  secondaryKey: secondary,

  tertiaryKey: tertiary,

  variant: variant,

  contrastLevel: contrast,

  useExpressiveOnContainerColors: true,
);