getDecoratedTextSpan function

TextSpan getDecoratedTextSpan({ required String source, required TextStyle style, required List<DecoratorRule> rules, bool selectable = false, })

Returns textSpan with decorated tagged text

Implementation

TextSpan getDecoratedTextSpan({
  required String source,
  required TextStyle style,
  required List<DecoratorRule> rules,
  bool selectable = false,
}) {
  final decorations = Decorator(
    rules: rules,
  ).getDecorations(source, rules);
  if (decorations.isEmpty) {
    return TextSpan(
      text: source,
      style: style,
    );
  } else {
    decorations.sort();
    final span = decorations
        .asMap()
        .map(
          (index, item) {
            try {
              String text = item.range.textInside(source);
              if (item.rule?.transformMatch != null) {
                text = item.rule!.transformMatch!(text);
              }
              return MapEntry(
                index,
                TextSpan(
                  style: item.rule?.style,
                  text: selectable ||
                          (item.rule?.leadingBuilder == null &&
                              item.rule?.leadingBuilder == null)
                      ? text
                      : null,
                  children: selectable ||
                          (item.rule?.leadingBuilder == null &&
                              item.rule?.leadingBuilder == null)
                      ? null
                      : [
                          WidgetSpan(
                            alignment: PlaceholderAlignment.middle,
                            child: GestureDetector(
                              onTap: decorations[index].rule?.onTap == null
                                  ? null
                                  : () {
                                      final decoration = decorations[index];
                                      if (decoration.rule?.onTap != null) {
                                        decoration.rule?.onTap!(
                                          decoration.range
                                              .textInside(source)
                                              .trim(),
                                        );
                                      }
                                    },
                              child: Row(
                                mainAxisSize: MainAxisSize.min,
                                children: [
                                  if (item.rule?.leadingBuilder != null)
                                    item.rule!.leadingBuilder!(
                                      decorations[index]
                                          .range
                                          .textInside(source)
                                          .trim(),
                                    ),
                                  Text(
                                    text,
                                    style: item.rule?.style,
                                  ),
                                  if (item.rule?.trailingBuilder != null)
                                    item.rule!.trailingBuilder!(
                                      decorations[index]
                                          .range
                                          .textInside(source)
                                          .trim(),
                                    ),
                                ],
                              ),
                            ),
                          ),
                        ],
                  recognizer: decorations[index].rule?.onTap == null
                      ? null
                      : (TapGestureRecognizer()
                        ..onTap = () {
                          final decoration = decorations[index];
                          if (decoration.rule?.onTap != null) {
                            decoration.rule?.onTap!(
                              decoration.range.textInside(source).trim(),
                            );
                          }
                        }),
                ),
              );
            } catch (err) {
              return MapEntry(index, null);
            }
          },
        )
        .values
        .whereType<TextSpan>()
        .toList();

    return TextSpan(children: span, style: style);
  }
}