style static method

TextStyle style({ required BuildContext context, double size = 14, FontWeightProtocol weight = const _DefaultFontWeight(), Color color = Colors.black, double? lineHeight, FontKey fontKey = FontKey.primary, })

Creates a scaled, theme-aware TextStyle.

Parameters:

• context: BuildContext used to resolve theme and device size
• size: Base font size in logical pixels (default: 14)
• weight: Font weight abstraction (default: regular / 400)
• color: Text color (default: Colors.black)
• lineHeight: Line height multiplier relative to font size. Examples:
  • 1.2 → tight
  • 1.4 → normal (recommended for body text)
  • 1.6 → relaxed / descriptive text

Notes:

• Line height is not scaled manually
• It scales naturally with font size
• null preserves Flutter default behavior

Implementation

static TextStyle style({
  required BuildContext context,
  double size = 14,
  FontWeightProtocol weight = const _DefaultFontWeight(),
  Color color = Colors.black,
  double? lineHeight,
  FontKey fontKey = FontKey.primary,
}) {
  // -----------------------------------------------------------------------
  // Responsive scaling
  // -----------------------------------------------------------------------
  final scale = DeviceHelper.getScalingFactor(context);
  final scaledSize = size * scale;

  // -----------------------------------------------------------------------
  // Convert abstract font weight → Flutter FontWeight
  //
  // FontWeight.values index mapping:
  // w100 → 0, w200 → 1, ... w900 → 8
  // -----------------------------------------------------------------------
  final fontWeightIndex = (weight.weightValue ~/ 100) - 1;
  final fontWeight = FontWeight
      .values[fontWeightIndex.clamp(0, FontWeight.values.length - 1)];

  // -----------------------------------------------------------------------
  // Resolve font family from typography theme extension
  // -----------------------------------------------------------------------
  final fontFamily = FontRegistry.getFont(fontKey);

  return TextStyle(
    inherit: true, // Allows theme/default overrides and safer merging
    fontFamily: fontFamily,
    fontSize: scaledSize,
    fontWeight: fontWeight,
    color: color,
    height: lineHeight == null ? null : lineHeight * scale,
  );
}