ZefyrThemeData.fallback constructor

ZefyrThemeData.fallback(BuildContext context)

Implementation

factory ZefyrThemeData.fallback(BuildContext context) {
  final themeData = Theme.of(context);
  final defaultStyle = DefaultTextStyle.of(context);
  final baseStyle = defaultStyle.style.copyWith(
    fontSize: 16.0,
    height: 1.3,
  );
  final baseSpacing = VerticalSpacing(top: 6.0, bottom: 10);

  String? fontFamily;
  switch (themeData.platform) {
    case TargetPlatform.iOS:
    case TargetPlatform.macOS:
      fontFamily = 'Menlo';
      break;
    case TargetPlatform.android:
    case TargetPlatform.fuchsia:
    case TargetPlatform.windows:
    case TargetPlatform.linux:
      fontFamily = 'Roboto Mono';
      break;
  }

  return ZefyrThemeData(
    bold: TextStyle(fontWeight: FontWeight.bold),
    italic: TextStyle(fontStyle: FontStyle.italic),
    underline: TextStyle(decoration: TextDecoration.underline),
    strikethrough: TextStyle(decoration: TextDecoration.lineThrough),
    link: TextStyle(
      color: themeData.colorScheme.secondary,
      decoration: TextDecoration.underline,
    ),
    paragraph: TextBlockTheme(
      style: baseStyle,
      spacing: baseSpacing,
      // lineSpacing is not relevant for paragraphs since they consist of one line
    ),
    heading1: TextBlockTheme(
      style: defaultStyle.style.copyWith(
        fontSize: 34.0,
        color: defaultStyle.style.color!.withOpacity(0.70),
        height: 1.15,
        fontWeight: FontWeight.w300,
      ),
      spacing: VerticalSpacing(top: 16.0, bottom: 0.0),
    ),
    heading2: TextBlockTheme(
      style: TextStyle(
        fontSize: 24.0,
        color: defaultStyle.style.color!.withOpacity(0.70),
        height: 1.15,
        fontWeight: FontWeight.normal,
      ),
      spacing: VerticalSpacing(bottom: 0.0, top: 8.0),
    ),
    heading3: TextBlockTheme(
      style: TextStyle(
        fontSize: 20.0,
        color: defaultStyle.style.color!.withOpacity(0.70),
        height: 1.25,
        fontWeight: FontWeight.w500,
      ),
      spacing: VerticalSpacing(bottom: 0.0, top: 8.0),
    ),
    lists: TextBlockTheme(
      style: baseStyle,
      spacing: baseSpacing,
      lineSpacing: VerticalSpacing(bottom: 6),
    ),
    quote: TextBlockTheme(
      style: TextStyle(color: baseStyle.color!.withOpacity(0.6)),
      spacing: baseSpacing,
      lineSpacing: VerticalSpacing(top: 6, bottom: 2),
      decoration: BoxDecoration(
        border: Border(
          left: BorderSide(width: 4, color: Colors.grey.shade300),
        ),
      ),
    ),
    code: TextBlockTheme(
      style: TextStyle(
        color: Colors.blue.shade900.withOpacity(0.9),
        fontFamily: fontFamily,
        fontSize: 13.0,
        height: 1.15,
      ),
      spacing: baseSpacing,
      decoration: BoxDecoration(
        color: Colors.grey.shade50,
        borderRadius: BorderRadius.circular(2),
      ),
    ),
  );
}