class Loofah::Scrubbers::Whitewash

def scrub(node)
  case node.type
  when Nokogiri::XML::Node::ELEMENT_NODE
    if HTML5::Scrub.allowed_element?(node.name)
      node.attributes.each { |attr| node.remove_attribute(attr.first) }
      return CONTINUE if node.namespaces.empty?
    end
  when Nokogiri::XML::Node::TEXT_NODE, Nokogiri::XML::Node::CDATA_SECTION_NODE
    return CONTINUE
  end
  node.remove
  STOP
end