public static function consume()

in src/unparsed-blocks/SetextHeading.php [22:58]

32 lines of code
9 McCabe index (conditional complexity)


  public static function consume(
    Context $context,
    Lines $lines,
  ): ?(Block, Lines) {
    if ($context->isInParagraphContinuation()) {
      return null;
    }

    list($first_col, $first, $lines) = $lines->getColumnFirstLineAndRest();
    $heading = $first;

    while (!$lines->isEmpty()) {
      list($col, $line, $rest) = $lines->getColumnFirstLineAndRest();
      if (Lines::isBlankLine($line)) {
        return null;
      }

      $matches = Regex\first_match($line, re"/^ {0,3}(?<level>=+|-+) *$/");
      if ($matches is nonnull) {
        // Heading underline can not be a lazy continuation item
        if ($col >= $first_col) {
          $level = $matches['level'][0] === '=' ? 1 : 2;
          return tuple(
            new self($level, Str\trim($heading)),
            $rest,
          );
        }
      }

      if (!_Private\is_paragraph_continuation_text($context, $lines)) {
        return null;
      }
      $heading .= "\n".$line;
      $lines = $rest;
    }
    return null;
  }