SoundSoftware Code Site

module CodeRay

module Encoders

  class HTML

    class CSS  # :nodoc:

      attr :stylesheet

      def CSS.load_stylesheet style = nil

        CodeRay::Styles[style]

      end

      def initialize style = :default

        @classes = Hash.new

        style = CSS.load_stylesheet style

        @stylesheet = [

          style::CSS_MAIN_STYLES,

          style::TOKEN_COLORS.gsub(/^(?!$)/, '.CodeRay ')

        ].join("\n")

        parse style::TOKEN_COLORS

      end

      def get_style styles

        cl = @classes[styles.first]

        return '' unless cl

        style = ''

        1.upto styles.size do |offset|

          break if style = cl[styles[offset .. -1]]

        end

        # warn 'Style not found: %p' % [styles] if style.empty?

        return style

      end

    private

      CSS_CLASS_PATTERN = /

        (                    # $1 = selectors

          (?:

            (?: \s* \. [-\w]+ )+

            \s* ,?

          )+

        )

        \s* \{ \s*

        ( [^\}]+ )?          # $2 = style

        \s* \} \s*

      |

        ( [^\n]+ )           # $3 = error

      /mx

      def parse stylesheet

        stylesheet.scan CSS_CLASS_PATTERN do |selectors, style, error|

          raise "CSS parse error: '#{error.inspect}' not recognized" if error

          for selector in selectors.split(',')

            classes = selector.scan(/[-\w]+/)

            cl = classes.pop

            @classes[cl] ||= Hash.new

            @classes[cl][classes] = style.to_s.strip.delete(' ').chomp(';')

          end

        end

      end

    end

  end

end

end