Function formatNode

src/formatter.ts:143–461

(n: Node, o: Options = {})

}

function* formatNode(n: Node, o: Options = {}) {
  const no = { ...o, parent: n };
  const indent = SPACE.repeat(no.indent || 0);

  switch (n.type) {
    case 'document': {
      if (n.attributes.frontmatter && n.attributes.frontmatter.length) {
        yield '---' + NL + n.attributes.frontmatter + NL + '---' + NL + NL;
      }
      yield* trimStart(formatChildren(n, no));
      break;
    }
    case 'heading': {
      yield NL;
      yield indent;
      yield '#'.repeat(n.attributes.level || 1);
      yield SPACE;
      yield* trimStart(formatChildren(n, no));
      yield* formatAnnotations(n);
      yield NL;
      break;
    }
    case 'paragraph': {
      yield NL;
      yield* formatChildren(n, no);
      yield* formatAnnotations(n);
      yield NL;
      break;
    }
    case 'inline': {
      yield indent;
      yield* formatChildren(n, no);
      break;
    }
    case 'image': {
      yield '!';
      yield '[';
      yield* formatValue(n.attributes.alt, no);
      yield ']';
      yield '(';
      yield* typeof n.attributes.src === 'string'
        ? escapeMarkdownCharacters(n.attributes.src, /[()]/g)
        : formatValue(n.attributes.src, no);
      if (n.attributes.title) {
        yield SPACE + `"${n.attributes.title}"`;
      }
      yield ')';
      break;
    }
    case 'link': {
      const children = [...formatChildren(n, no)].join('');

      // https://spec.commonmark.org/0.31.2/#autolinks
      if (children === n.attributes.href && !n.attributes.title) {
        yield `<${n.attributes.href}>`;
        break;
      }