resolve method

@override RSwitchResolvedTokens resolve({ required BuildContext context, required RSwitchSpec spec, required Set<WidgetState> states, BoxConstraints? constraints, RenderOverrides? overrides, })

Implementation

@override
RSwitchResolvedTokens resolve({
  required BuildContext context,
  required RSwitchSpec spec,
  required Set<WidgetState> states,
  BoxConstraints? constraints,
  RenderOverrides? overrides,
}) {
  final motionTheme =
      HeadlessThemeProvider.of(context)?.capability<HeadlessMotionTheme>() ??
          HeadlessMotionTheme.cupertino;

  final q = HeadlessWidgetStateQuery(states);
  final contractOverrides = overrides?.get<RSwitchOverrides>();

  // Use provided brightness or fallback to platform brightness
  final effectiveBrightness =
      brightness ?? MediaQuery.platformBrightnessOf(context);
  final isDark = effectiveBrightness == Brightness.dark;

  // Cupertino Switch baseline values (iOS style).
  // Cupertino switches have a fixed thumb size (no dynamic sizing like Material 3)
  const defaultTrackSize = Size(51, 31);
  // Flutter: _kThumbRadius = 14.0 -> diameter 28.0
  const defaultThumbSize = Size(28, 28);
  const defaultTrackBorderRadius = BorderRadius.all(Radius.circular(16));
  const defaultThumbPadding = 2.0;

  final isSelected = spec.value || q.isSelected;

  Color activeTrackColor;
  Color inactiveTrackColor;
  Color activeThumbColor;
  Color inactiveThumbColor;
  Color trackOutlineColor;

  if (q.isDisabled) {
    activeTrackColor = CupertinoColors.systemGreen.withValues(alpha: 0.5);
    inactiveTrackColor = isDark
        ? CupertinoColors.systemGrey.withValues(alpha: 0.5)
        : CupertinoColors.systemGrey4.withValues(alpha: 0.5);
    activeThumbColor = CupertinoColors.white.withValues(alpha: 0.8);
    inactiveThumbColor = CupertinoColors.white.withValues(alpha: 0.8);
    trackOutlineColor = isDark
        ? CupertinoColors.systemGrey.withValues(alpha: 0.5)
        : CupertinoColors.systemGrey4.withValues(alpha: 0.5);
  } else {
    activeTrackColor = CupertinoColors.systemGreen;
    inactiveTrackColor =
        isDark ? CupertinoColors.systemGrey : CupertinoColors.systemGrey4;
    activeThumbColor = CupertinoColors.white;
    inactiveThumbColor = CupertinoColors.white;
    trackOutlineColor =
        isDark ? CupertinoColors.systemGrey : CupertinoColors.systemGrey4;
  }

  final pressOverlayColor = isSelected
      ? CupertinoColors.systemGreen.withValues(alpha: 0.12)
      : CupertinoColors.systemGrey.withValues(alpha: 0.12);

  // Cupertino doesn't use state layer, but we provide transparent fallback
  final stateLayerColor =
      WidgetStateProperty.all<Color?>(const Color(0x00000000));

  final minTapTargetSize = _resolveMinTapTargetSize(
    constraints: constraints,
    override: contractOverrides?.minTapTargetSize,
  );

  return RSwitchResolvedTokens(
    trackSize: contractOverrides?.trackSize ?? defaultTrackSize,
    trackBorderRadius:
        contractOverrides?.trackBorderRadius ?? defaultTrackBorderRadius,
    trackOutlineColor:
        contractOverrides?.trackOutlineColor ?? trackOutlineColor,
    trackOutlineWidth: contractOverrides?.trackOutlineWidth ?? 0.0,
    activeTrackColor: contractOverrides?.activeTrackColor ?? activeTrackColor,
    inactiveTrackColor:
        contractOverrides?.inactiveTrackColor ?? inactiveTrackColor,
    // Cupertino: thumb size is fixed (no unselected/selected/pressed differentiation)
    thumbSizeUnselected:
        contractOverrides?.thumbSizeUnselected ?? defaultThumbSize,
    thumbSizeSelected:
        contractOverrides?.thumbSizeSelected ?? defaultThumbSize,
    thumbSizePressed: contractOverrides?.thumbSizePressed ?? defaultThumbSize,
    thumbSizeTransition:
        contractOverrides?.thumbSizeTransition ?? defaultThumbSize,
    activeThumbColor: contractOverrides?.activeThumbColor ?? activeThumbColor,
    inactiveThumbColor:
        contractOverrides?.inactiveThumbColor ?? inactiveThumbColor,
    thumbPadding: contractOverrides?.thumbPadding ?? defaultThumbPadding,
    // Flutter: _kDisabledOpacity = 0.5
    disabledOpacity: contractOverrides?.disabledOpacity ?? 0.5,
    pressOverlayColor:
        contractOverrides?.pressOverlayColor ?? pressOverlayColor,
    // Native CupertinoSwitch does not dim the whole control on press.
    pressOpacity: contractOverrides?.pressOpacity ?? 1.0,
    // Flutter: _kSwitchSize = 59×39 (track 51×31 centered inside).
    minTapTargetSize: minTapTargetSize,
    // Cupertino doesn't use state layer
    stateLayerRadius: contractOverrides?.stateLayerRadius ?? 0.0,
    stateLayerColor: contractOverrides?.stateLayerColor ?? stateLayerColor,
    thumbIcon: contractOverrides?.thumbIcon,
    motion: contractOverrides?.motion ??
        RSwitchMotionTokens(
          stateChangeDuration: motionTheme.button.stateChangeDuration,
          thumbSlideDuration: const Duration(milliseconds: 200),
        ),
  );
}