module Roadie # @api private # Class that improves the markup of a HTML DOM tree # # This class will improve the following aspects of the DOM: # * A HTML5 doctype will be added if missing, other doctypes will be left as-is. # * Basic HTML elements will be added if missing. # * ++ # * ++ # * ++ # * ++ declaring charset and content-type (text/html) # # @note Due to a Nokogiri bug, the HTML5 doctype cannot be added under JRuby. No doctype is outputted under JRuby. # See https://github.com/sparklemotion/nokogiri/issues/984 class MarkupImprover # The original HTML must also be passed in in order to handle the doctypes # since a +Nokogiri::HTML::Document+ will always have a doctype, no matter if # the original source had it or not. Reading the raw HTML is the only way to # determine if we want to add a HTML5 doctype or not. def initialize(dom, original_html) @dom = dom @html = original_html end # @return [nil] passed DOM will be mutated def improve ensure_doctype_present ensure_html_element_present head = ensure_head_element_present ensure_declared_charset head end protected attr_reader :dom private def ensure_doctype_present return if uses_buggy_jruby? return if @html.include?('