serialize method

@override String? serialize(Document document, DocumentNode node, { NodeSelection? selection, })

Serializes the given node to a Markdown String.

When selection is null, the entire node is converted to markdown. When selection is non-null, only the selected range is converted to markdown.

Returns null if the node is not supported by this serializer.

Implementation

@override
String? serialize(
  Document document,
  DocumentNode node, {
  NodeSelection? selection,
}) {
  if (node is! ParagraphNode) {
    return null;
  }

  // Only serialize this node when this is a header node.
  final Attribution? blockType = node.getMetadataValue('blockType');
  final isHeaderNode = blockType == header1Attribution ||
      blockType == header2Attribution ||
      blockType == header3Attribution ||
      blockType == header4Attribution ||
      blockType == header5Attribution ||
      blockType == header6Attribution;

  if (!isHeaderNode) {
    return null;
  }

  return doSerialization(document, node);
}