SoundSoftware Code Site

module CodeRay

module Scanners

  load :html

  load :ruby

  # RHTML Scanner

  class RHTML < Scanner

    include Streamable

    register_for :rhtml

    title 'HTML ERB Template'

    KINDS_NOT_LOC = HTML::KINDS_NOT_LOC

    ERB_RUBY_BLOCK = /

      <%(?!%)[=-]?

      (?>

        [^\-%]*    # normal*

        (?>        # special

          (?: %(?!>) | -(?!%>) )

          [^\-%]*  # normal*

        )*

      )

      (?: -?%> )?

    /x

    START_OF_ERB = /

      <%(?!%)

    /x

  private

    def setup

      @ruby_scanner = CodeRay.scanner :ruby, :tokens => @tokens, :keep_tokens => true

      @html_scanner = CodeRay.scanner :html, :tokens => @tokens, :keep_tokens => true, :keep_state => true

    end

    def reset_instance

      super

      @html_scanner.reset

    end

    def scan_tokens tokens, options

      until eos?

        if (match = scan_until(/(?=#{START_OF_ERB})/o) || scan_until(/\z/)) and not match.empty?

          @html_scanner.tokenize match

        elsif match = scan(/#{ERB_RUBY_BLOCK}/o)

          start_tag = match[/\A<%[-=#]?/]

          end_tag = match[/-?%?>?\z/]

          tokens << [:open, :inline]

          tokens << [start_tag, :inline_delimiter]

          code = match[start_tag.size .. -1 - end_tag.size]

          if start_tag == '<%#'

            tokens << [code, :comment]

          else

            @ruby_scanner.tokenize code

          end

          tokens << [end_tag, :inline_delimiter] unless end_tag.empty?

          tokens << [:close, :inline]

        else

          raise_inspect 'else-case reached!', tokens

        end

      end

      tokens

    end

  end

end

end