class CFPropertyList::NokogiriXMLParser

def to_str(opts={})
  doc = Nokogiri::XML::Document.new
  @doc = doc
  doc.root = doc.create_element 'plist', :version => '1.0'
  doc.encoding = 'UTF-8'
  doc.root << opts[:root].to_xml(self)
  # ugly hack, but there's no other possibility I know
  s_opts = Nokogiri::XML::Node::SaveOptions::AS_XML
  s_opts |= Nokogiri::XML::Node::SaveOptions::FORMAT if opts[:formatted]
  str = doc.serialize(:save_with => s_opts)
  str1 = String.new
  first = false
  str.each_line do |line|
    str1 << line
    unless(first) then
      str1 << "<!DOCTYPE plist PUBLIC \"-//Apple//DTD PLIST 1.0//EN\" \"http://www.apple.com/DTDs/PropertyList-1.0.dtd\">\n" if line =~ /^\s*<\?xml/
    end
    first = true
  end
  str1.force_encoding('UTF-8') if str1.respond_to?(:force_encoding)
  return str1
end