Pass lookup context to the layout handlers

I want to start reducing the calls to `lookup_context`.  That method
caches the lookup context in an ivar, but I would like to cache the
lookup context on the stack.  That way we aren't coupled to the behavior
of the `lookup_context` method.

2 files changed, 6 insertions, 6 deletions

diff --git a/actionview/lib/action_view/layouts.rb b/actionview/lib/action_view/layouts.rb
index 3e6d352c15..08f66bf435 100644
--- a/actionview/lib/action_view/layouts.rb
+++ b/actionview/lib/action_view/layouts.rb
@@ -322,7 +322,7 @@ module ActionView
           end
 
         class_eval <<-RUBY, __FILE__, __LINE__ + 1
-          def _layout(formats)
+          def _layout(lookup_context, formats)
             if _conditional_layout?
               #{layout_definition}
             else
@@ -388,8 +388,8 @@ module ActionView
       case name
       when String     then _normalize_layout(name)
       when Proc       then name
-      when true       then Proc.new { |formats| _default_layout(formats, true)  }
-      when :default   then Proc.new { |formats| _default_layout(formats, false) }
+      when true       then Proc.new { |lookup_context, formats| _default_layout(lookup_context, formats, true)  }
+      when :default   then Proc.new { |lookup_context, formats| _default_layout(lookup_context, formats, false) }
       when false, nil then nil
       else
         raise ArgumentError,
@@ -411,9 +411,9 @@ module ActionView
     #
     # ==== Returns
     # * <tt>template</tt> - The template object for the default layout (or +nil+)
-    def _default_layout(formats, require_layout = false)
+    def _default_layout(lookup_context, formats, require_layout = false)
       begin
-        value = _layout(formats) if action_has_layout?
+        value = _layout(lookup_context, formats) if action_has_layout?
       rescue NameError => e
         raise e, "Could not render layout: #{e.message}"
       end
diff --git a/actionview/lib/action_view/renderer/template_renderer.rb b/actionview/lib/action_view/renderer/template_renderer.rb
index c17d6182e8..b6861d49fe 100644
--- a/actionview/lib/action_view/renderer/template_renderer.rb
+++ b/actionview/lib/action_view/renderer/template_renderer.rb
@@ -88,7 +88,7 @@ module ActionView
             raise unless template_exists?(layout, nil, false, [], all_details)
           end
         when Proc
-          resolve_layout(layout.call(formats), keys, formats)
+          resolve_layout(layout.call(@lookup_context, formats), keys, formats)
         else
           layout
         end