Helpers with an initial test

1 files changed, 55 insertions, 0 deletions

diff --git a/actionpack/lib/action_controller/abstract/helpers.rb b/actionpack/lib/action_controller/abstract/helpers.rb
new file mode 100644
index 0000000000..b942a7ea80
--- /dev/null
+++ b/actionpack/lib/action_controller/abstract/helpers.rb
@@ -0,0 +1,55 @@
+module AbstractController
+  module Helpers
+  
+    def self.included(klass)
+      klass.class_eval do
+        extend ClassMethods
+        unless self < ::AbstractController::Renderer
+          raise "You need to include AbstractController::Renderer before including " \
+                "AbstractController::Helpers"
+        end
+        extlib_inheritable_accessor :master_helper_module
+        self.master_helper_module = Module.new
+      end
+    end
+    
+    def _action_view
+      av = super
+      av.helpers.send(:include, master_helper_module)
+    end
+    
+    module ClassMethods
+      def inherited(klass)
+        klass.master_helper_module = Module.new
+        klass.master_helper_module.__send__ :include, master_helper_module
+        
+        super
+      end
+      
+      def add_template_helper(mod)
+        master_helper_module.module_eval { include mod }
+      end
+      
+      def helper_method(*meths)
+        meths.flatten.each do |meth|
+          master_helper_module.class_eval <<-ruby_eval, __FILE__, __LINE__ + 1
+            def #{meth}(*args, &blk)
+              controller.send(%(#{meth}), *args, &blk)
+            end
+          ruby_eval
+        end
+      end
+      
+      def helper(*args, &blk)
+        args.flatten.each do |arg|
+          case arg
+          when Module
+            add_template_helper(arg)
+          end
+        end
+        master_helper_module.module_eval(&blk) if block_given?
+      end
+    end
+    
+  end
+end
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