Chris@0: module CodeRay
Chris@0: module Encoders
Chris@0: 
Chris@0:   class HTML
Chris@0:     class CSS
Chris@0: 
Chris@0:       attr :stylesheet
Chris@0: 
Chris@0:       def CSS.load_stylesheet style = nil
Chris@0:         CodeRay::Styles[style]
Chris@0:       end
Chris@0: 
Chris@0:       def initialize style = :default
Chris@0:         @classes = Hash.new
Chris@0:         style = CSS.load_stylesheet style
Chris@0:         @stylesheet = [
Chris@0:           style::CSS_MAIN_STYLES,
Chris@0:           style::TOKEN_COLORS.gsub(/^(?!$)/, '.CodeRay ')
Chris@0:         ].join("\n")
Chris@0:         parse style::TOKEN_COLORS
Chris@0:       end
Chris@0: 
Chris@0:       def [] *styles
Chris@0:         cl = @classes[styles.first]
Chris@0:         return '' unless cl
Chris@0:         style = ''
Chris@0:         1.upto(styles.size) do |offset|
Chris@0:           break if style = cl[styles[offset .. -1]]
Chris@0:         end
Chris@0:         # warn 'Style not found: %p' % [styles] if style.empty?
Chris@0:         return style
Chris@0:       end
Chris@0: 
Chris@0:     private
Chris@0: 
Chris@0:       CSS_CLASS_PATTERN = /
Chris@0:         (                    # $1 = selectors
Chris@0:           (?:
Chris@0:             (?: \s* \. [-\w]+ )+
Chris@0:             \s* ,?
Chris@0:           )+
Chris@0:         )
Chris@0:         \s* \{ \s*
Chris@0:         ( [^\}]+ )?          # $2 = style
Chris@0:         \s* \} \s*
Chris@0:       |
Chris@0:         ( . )                # $3 = error
Chris@0:       /mx
Chris@0:       def parse stylesheet
Chris@0:         stylesheet.scan CSS_CLASS_PATTERN do |selectors, style, error|
Chris@0:           raise "CSS parse error: '#{error.inspect}' not recognized" if error
Chris@0:           for selector in selectors.split(',')
Chris@0:             classes = selector.scan(/[-\w]+/)
Chris@0:             cl = classes.pop
Chris@0:             @classes[cl] ||= Hash.new
Chris@0:             @classes[cl][classes] = style.to_s.strip.delete(' ').chomp(';')
Chris@0:           end
Chris@0:         end
Chris@0:       end
Chris@0: 
Chris@0:     end
Chris@0:   end
Chris@0: 
Chris@0: end
Chris@0: end
Chris@0: 
Chris@0: if $0 == __FILE__
Chris@0:   require 'pp'
Chris@0:   pp CodeRay::Encoders::HTML::CSS.new
Chris@0: end