module Haml
  module Safemode    
    class Jail < Blankslate 
      def initialize(source = nil)
        @source = source
      end
    
      def to_jail
        self
      end
    
      def to_s
        @source.to_s
      end
    
      def method_missing(method, *args, &block)
        unless self.class.allowed?(method)
          raise Haml::Safemode::NoMethodError.new(method, self.class.name, @source.class.name) 
        end
        @source.send(method, *args, &block).to_jail
      end
    end
  end
end