parse method

@override void parse(BuildMetadata meta)

Parses tree for build ops and text styles.

Implementation

@override
void parse(BuildMetadata meta) {
  switch (meta.element.localName) {
    case kTagSvg:
      meta.register(
        _tagSvg ??= BuildOp(
          // TODO: set debugLabel when our minimum core version >= 1.0
          defaultStyles: (element) {
            // other tags that share the same logic:
            // - IFRAME
            // - IMG
            //
            // consider update them together if this changes
            final attrs = element.attributes;
            final height = attrs[kAttributeSvgHeight];
            final width = attrs[kAttributeSvgWidth];

            return {
              'height': 'auto',
              'min-width': '0px',
              'min-height': '0px',
              'width': 'auto',
              if (height != null) 'height': height,
              if (width != null) 'width': width,
            };
          },
          onWidgets: (meta, widgets) {
            final bytesLoader = SvgStringLoader(meta.element.outerHtml);
            const src = ImageSource('');
            final built = _buildSvgPicture(meta, src, bytesLoader);
            return [built];
          },
        ),
      );
      break;
  }

  return super.parse(meta);
}