Store application and other context specific helper modules in ActionView::Base#helpers

actionpack/lib/action_controller/base.rb

@@ -1148,7 +1148,7 @@ module ActionController #:nodoc:
 
       def initialize_template_class(response)
         response.template = ActionView::Base.new(self.class.view_paths, {}, self)
-        response.template.extend self.class.master_helper_module
+        response.template.helpers.send :include, self.class.master_helper_module
         response.redirected_to = nil
         @performed_render = @performed_redirect = false
       end

actionpack/lib/action_view/base.rb

@@ -208,10 +208,24 @@ module ActionView #:nodoc:
       ActionView::PathSet.new(Array(value))
     end
 
+    attr_reader :helpers
+
+    class ProxyModule < Module
+      def initialize(receiver)
+        @receiver = receiver
+      end
+
+      def include(*args)
+        super(*args)
+        @receiver.extend(*args)
+      end
+    end
+
     def initialize(view_paths = [], assigns_for_first_render = {}, controller = nil)#:nodoc:
       @assigns = assigns_for_first_render
       @assigns_added = nil
       @controller = controller
+      @helpers = ProxyModule.new(self)
       self.view_paths = view_paths
     end
 

actionpack/lib/action_view/helpers/prototype_helper.rb

@@ -588,26 +588,8 @@ module ActionView
 
         private
           def include_helpers_from_context
-            unless generator_methods_module = @context.instance_variable_get(:@__javascript_generator_methods__)
-              modules = @context.extended_by - ([ActionView::Helpers] + ActionView::Helpers.included_modules)
-
-              generator_methods_module = Module.new do
-                modules.each do |mod|
-                  begin
-                    include mod
-                  rescue Exception => e
-                    # HACK: Probably not a good idea to suppress these warnings
-                    # AFAIK exceptions are only raised in while testing with mocha
-                    # because the module does not like to be included into other
-                    # non TestUnit classes
-                  end
-                end
-                include GeneratorMethods
-              end
-              @context.instance_variable_set(:@__javascript_generator_methods__, generator_methods_module)
-            end
-
-            extend generator_methods_module
+            extend @context.helpers if @context.respond_to?(:helpers)
+            extend GeneratorMethods
           end
 
         # JavaScriptGenerator generates blocks of JavaScript code that allow you