# File lib/nokogiri/css/xpath_visitor.rb, line 62
      def visit_attribute_condition node
         attribute = if (node.value.first.type == :FUNCTION) or (node.value.first.value.first =~ /::/)
                       ''
                     else
                       '@'
                     end
        attribute += node.value.first.accept(self)

        # Support non-standard css
        attribute.gsub!(/^@@/, '@')

        return attribute unless node.value.length == 3

        value = node.value.last
        value = "'#{value}'" if value !~ /^['"]/

        case node.value[1]
        when '*='
          "contains(#{attribute}, #{value})"
        when '^='
          "starts-with(#{attribute}, #{value})"
        when '|='
          "#{attribute} = #{value} or starts-with(#{attribute}, concat(#{value}, '-'))"
        when '~='
          "contains(concat(\" \", #{attribute}, \" \"),concat(\" \", #{value}, \" \"))"
        when '$='
          "substring(#{attribute}, string-length(#{attribute}) - " +
            "string-length(#{value}) + 1, string-length(#{value})) = #{value}"
        else
          attribute + " #{node.value[1]} " + "#{value}"
        end
      end