buildTextSpan method

@override TextSpan buildTextSpan({ BuildContext? context, TextStyle? style, bool? withComposing, })

Builds TextSpan from current editing value.

By default makes text in composing range appear as underlined. Descendants can override this method to customize appearance of text.

Implementation

@override
TextSpan buildTextSpan({
  BuildContext? context,
  TextStyle? style,
  bool? withComposing,
}) {
  final regExp = this.regExp ?? detectionRegExp()!;
  final baseStyle = style ?? const TextStyle();
  final detectedStyle = this.detectedStyle ??
      baseStyle.copyWith(
        color: Colors.blue,
      );
  final detections = text.toDetections(
    textStyle: baseStyle,
    detectedStyle: detectedStyle,
    detectionRegExp: regExp,
  );
  final composer = Composer(
    selection: value.selection.start,
    sourceText: value.text,
    detectedStyle: detectedStyle,
    detections: detections,
    composing: value.composing,
  );

  if (detections.isEmpty) {
    /// use same method as default textField to show composing underline
    return super.buildTextSpan(
      context: context!,
      style: baseStyle,
      withComposing: withComposing ?? false,
    );
  }
  return composer.getComposedTextSpan();
}