class Kramdown::Parser::Kramdown

def parse_span_html
  line = @src.current_line_number
  if (result = @src.scan(HTML_COMMENT_RE))
    @tree.children << Element.new(:xml_comment, result, nil, category: :span, location: line)
  elsif (result = @src.scan(HTML_TAG_CLOSE_RE))
    warning("Found invalidly used HTML closing tag for '#{@src[1]}' on line #{line}")
    add_text(result)
  elsif (result = @src.scan(HTML_TAG_RE))
    tag_name = @src[1]
    tag_name.downcase! if HTML_ELEMENT[tag_name.downcase]
    if HTML_BLOCK_ELEMENTS.include?(tag_name)
      warning("Found block HTML tag '#{tag_name}' in span-level text on line #{line}")
      add_text(result)
      return
    end
    attrs = parse_html_attributes(@src[2], line, HTML_ELEMENT[tag_name])
    attrs.each_value {|value| value.gsub!(/\n+/, ' ') unless value.empty? }
    do_parsing = if HTML_CONTENT_MODEL[tag_name] == :raw || @tree.options[:content_model] == :raw
                   false
                 else
                   @options[:parse_span_html]
                 end
    if (val = HTML_MARKDOWN_ATTR_MAP[attrs.delete('markdown')])
      if val == :block
        warning("Cannot use block-level parsing in span-level HTML tag (line #{line}) " \
                "- using default mode")
      elsif val == :span
        do_parsing = true
      elsif val == :default
        do_parsing = HTML_CONTENT_MODEL[tag_name] != :raw
      elsif val == :raw
        do_parsing = false
      end
    end
    el = Element.new(:html_element, tag_name, attrs, category: :span, location: line,
                     content_model: (do_parsing ? :span : :raw), is_closed: !!@src[4])
    @tree.children << el
    stop_re = /<\/#{Regexp.escape(tag_name)}\s*>/
    stop_re = Regexp.new(stop_re.source, Regexp::IGNORECASE) if HTML_ELEMENT[tag_name]
    if !@src[4] && !HTML_ELEMENTS_WITHOUT_BODY.include?(el.value)
      if parse_spans(el, stop_re, (do_parsing ? nil : [:span_html]))
        @src.scan(stop_re)
      else
        warning("Found no end tag for '#{el.value}' (line #{line}) - auto-closing it")
        add_text(@src.rest, el)
        @src.terminate
      end
    end
    Kramdown::Parser::Html::ElementConverter.convert(@root, el) if @options[:html_to_native]
  else
    add_text(@src.getch)
  end
end