module Kramdown::Parser::Html::Parser

def parse_raw_html(el, &block)

providing the block given to this method.
When an HTML start tag is found, processing is deferred to #handle_html_start_tag,

element).
- The matching end tag for the element +el+ is found (only used if +el+ is an HTML
- The end of the document is reached.

Parsing continues until one of the following criteria are fulfilled:
Parse raw HTML from the current source position, storing the found elements in +el+. 
def parse_raw_html(el, &block)
  @stack.push(@tree)
  @tree = el
  done = false
  while !@src.eos? && !done
    if (result = @src.scan_until(HTML_RAW_START))
      add_text(result, @tree, :text)
      line = @src.current_line_number
      if (result = @src.scan(HTML_COMMENT_RE))
        @tree.children << Element.new(:xml_comment, result, nil, category: :block, location: line)
      elsif (result = @src.scan(HTML_INSTRUCTION_RE))
        @tree.children << Element.new(:xml_pi, result, nil, category: :block, location: line)
      elsif @src.scan(HTML_CDATA_RE)
        @tree.children << Element.new(:text, @src[1], nil, cdata: true, location: line)
      elsif @src.scan(HTML_TAG_RE)
        if method(:handle_html_start_tag).arity.abs >= 1
          handle_html_start_tag(line, &block)
        else
          handle_html_start_tag(&block) # DEPRECATED: method needs to accept line number in 2.0
        end
      elsif @src.scan(HTML_TAG_CLOSE_RE)
        if @tree.value == (HTML_ELEMENT[@tree.value] ? @src[1].downcase : @src[1])
          done = true
        else
          add_text(@src.matched, @tree, :text)
          warning("Found invalidly used HTML closing tag for '#{@src[1]}' on " \
                  "line #{line} - ignoring it")
        end
      else
        add_text(@src.getch, @tree, :text)
      end
    else
      add_text(@src.rest, @tree, :text)
      @src.terminate
      if @tree.type == :html_element
        warning("Found no end tag for '#{@tree.value}' on line " \
                "#{@tree.options[:location]} - auto-closing it")
      end
      done = true
    end
  end
  @tree = @stack.pop
end