# remaining class methods:
#   allow, allowed?, allowed_methods, inherited, init_allowed_methods, inspect, 
#   method_added, methods, name, new
# 
# remaining instance methods:  
#   class, inspect, methods, to_s

module Haml
  module Safemode
    class Blankslate
      @@allow_instance_methods = ['class', 'inspect', 'methods', 'to_s']
      @@allow_class_methods    = ['methods', 'new', 'name', 'inspect']
      
      silently { undef_methods(*instance_methods - @@allow_instance_methods) }    
      class << self      
        silently { undef_methods(*instance_methods - @@allow_class_methods) }
        
        def method_added(name) end # ActiveSupport needs this
          
        def inherited(subclass)
          subclass.init_allowed_methods(@allowed_methods)
        end
        
        def init_allowed_methods(allowed_methods)
          @allowed_methods = allowed_methods
        end
        
        def allowed_methods
          @allowed_methods ||= []
        end
      
        def allow(*names)          
          @allowed_methods = allowed_methods + names.map(&:to_s)
        end    
    
        def allowed?(name)
          allowed_methods.include? name.to_s
        end
      end
    end
  end
end