module ActionView #:nodoc: class Template module Handlers #:nodoc: autoload :ERB, 'action_view/template/handlers/erb' autoload :RJS, 'action_view/template/handlers/rjs' autoload :Builder, 'action_view/template/handlers/builder' def self.extended(base) base.register_default_template_handler :erb, ERB base.register_template_handler :rjs, RJS base.register_template_handler :builder, Builder # TODO: Depreciate old template extensions base.register_template_handler :rhtml, ERB base.register_template_handler :rxml, Builder end @@template_handlers = {} @@default_template_handlers = nil def self.extensions @@template_extensions ||= @@template_handlers.keys end # Register a class that knows how to handle template files with the given # extension. This can be used to implement new template types. # The constructor for the class must take the ActiveView::Base instance # as a parameter, and the class must implement a +render+ method that # takes the contents of the template to render as well as the Hash of # local assigns available to the template. The +render+ method ought to # return the rendered template as a string. def register_template_handler(extension, klass) @@template_handlers[extension.to_sym] = klass end def template_handler_extensions @@template_handlers.keys.map {|key| key.to_s }.sort end def registered_template_handler(extension) extension && @@template_handlers[extension.to_sym] end def register_default_template_handler(extension, klass) register_template_handler(extension, klass) @@default_template_handlers = klass end def handler_class_for_extension(extension) (extension && registered_template_handler(extension.to_sym)) || @@default_template_handlers end end end end