From 9d3d7746702b65ddc09364c260ee4ace4b178281 Mon Sep 17 00:00:00 2001
From: Yehuda Katz + Carl Lerche <ykatz+clerche@engineyard.com>
Date: Thu, 21 May 2009 15:23:52 -0700
Subject: Update render options to remove performance implications of many
 render options types

---
 .../action_controller/new_base/render_options.rb   | 32 +++++++++++++++++-----
 1 file changed, 25 insertions(+), 7 deletions(-)

(limited to 'actionpack/lib/action_controller')

diff --git a/actionpack/lib/action_controller/new_base/render_options.rb b/actionpack/lib/action_controller/new_base/render_options.rb
index a9ac0e0a41..aa6593b957 100644
--- a/actionpack/lib/action_controller/new_base/render_options.rb
+++ b/actionpack/lib/action_controller/new_base/render_options.rb
@@ -7,14 +7,32 @@ module ActionController
       self._renderers = []
     end
     
-    def render_to_body(options)
-      _renderers.each do |renderer|
-        if options.key?(renderer)
-          _process_options(options)
-          return send("_render_#{renderer}", options[renderer], options)
+    module ClassMethods
+      def _write_render_options
+        renderers = _renderers.map do |r|
+          <<-RUBY_EVAL
+            if options.key?(:#{r})
+              _process_options(options)
+              return _render_#{r}(options[:#{r}], options)
+            end
+          RUBY_EVAL
         end
+        
+        class_eval <<-RUBY_EVAL, __FILE__, __LINE__ + 1
+          def _handle_render_options(options)
+            #{renderers.join}
+          end
+        RUBY_EVAL
+      end
+      
+      def _add_render_option(name)
+        _renderers << name
+        _write_render_options
       end
-      super
+    end
+    
+    def render_to_body(options)
+      _handle_render_options(options) || super
     end
   end
   
@@ -26,7 +44,7 @@ module ActionController
       depends_on RenderOptions
 
       def self.register_renderer(name)
-        included { _renderers << name }
+        included { _add_render_option(name) }
       end
     end
   end
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