# File lib/highline/string_extensions.rb, line 32
    def self.included(base)
      HighLine::COLORS.each do |color|
        base.class_eval "def \#{color.downcase}\ncolor(:\#{color.downcase})\nend\n"
        base.class_eval "def on_\#{color.downcase}\non(:\#{color.downcase})\nend\n"
        HighLine::STYLES.each do |style|
          base.class_eval "def \#{style.downcase}\ncolor(:\#{style.downcase})\nend\n"
        end
      end
      
      base.class_eval do
        def color(*args)
          self.class.new(HighLine.color(self, *args))
        end
        alias_method :foreground, :color
        
        def on(arg)
          color(('on_' + arg.to_s).to_sym)
        end

        def uncolor
          self.class.new(HighLine.uncolor(self))
        end
        
        def rgb(*colors)
          color_code = colors.map{|color| color.is_a?(Numeric) ? '%02x'%color : color.to_s}.join
          raise "Bad RGB color #{colors.inspect}" unless color_code =~ /^[a-fA-F0-9]{6}/
          color("rgb_#{color_code}".to_sym)
        end
        
        def on_rgb(*colors)
          color_code = colors.map{|color| color.is_a?(Numeric) ? '%02x'%color : color.to_s}.join
          raise "Bad RGB color #{colors.inspect}" unless color_code =~ /^[a-fA-F0-9]{6}/
          color("on_rgb_#{color_code}".to_sym)
        end
        
        # TODO Chain existing method_missing
        def method_missing(method, *args, &blk)
          if method.to_s =~ /^(on_)?rgb_([0-9a-fA-F]{6})$/
            color(method)
          else
            raise NoMethodError, "undefined method `#{method}' for #<#{self.class}:#{'%#x'%self.object_id}>"
          end
        end
      end
    end