Declare file extensions exempt from layouts. Closes #6219.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@5126 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

1 files changed, 15 insertions, 1 deletions

diff --git a/actionpack/lib/action_controller/base.rb b/actionpack/lib/action_controller/base.rb
index f42686c318..c971989582 100755
--- a/actionpack/lib/action_controller/base.rb
+++ b/actionpack/lib/action_controller/base.rb
@@ -315,6 +315,9 @@ module ActionController #:nodoc:
     # Returns the name of the action this controller is processing.
     attr_accessor :action_name
 
+    # Templates that are exempt from layouts
+    @@exempt_from_layout = Set.new([/\.rjs$/])
+
     class << self
       # Factory for the standard create, process loop where the controller is discarded after processing.
       def process(request, response) #:nodoc:
@@ -395,6 +398,14 @@ module ActionController #:nodoc:
           filtered_parameters
         end
       end
+
+      # Don't render layouts for templates with the given extensions.
+      def exempt_from_layout(*extensions)
+        regexps = extensions.collect do |extension|
+          extension.is_a?(Regexp) ? extension : /\.#{Regexp.escape(extension.to_s)}$/
+        end
+        @@exempt_from_layout.merge regexps
+      end
     end
 
     public
@@ -1094,7 +1105,10 @@ module ActionController #:nodoc:
       end
 
       def template_exempt_from_layout?(template_name = default_template_name)
-        template_name =~ /\.rjs$/ || (@template.pick_template_extension(template_name) == :rjs rescue false)
+        @@exempt_from_layout.any? { |ext| template_name =~ ext } or
+          @template.pick_template_extension(template_name) == :rjs
+      rescue
+        false
       end
 
       def assert_existence_of_template_file(template_name)