controller_path is required by ActionView, so move it up to AbstractController and refactor AbstractController::Layouts.

actionmailer/lib/action_mailer/base.rb

@@ -364,6 +364,7 @@ module ActionMailer #:nodoc:
       def mailer_name
         @mailer_name ||= name.underscore
       end
+      alias :controller_path :mailer_name
 
       def delivery_method=(method_name)
         @delivery_method = ActionMailer::DeliveryMethod.lookup_method(method_name)

actionpack/lib/abstract_controller/base.rb

@@ -72,6 +72,16 @@ module AbstractController
           # And always exclude explicitly hidden actions
           hidden_actions
       end
+
+      # Returns the full controller name, underscored, without the ending Controller.
+      # For instance, MyApp::MyPostsController would return "my_app/my_posts" for
+      # controller_name.
+      #
+      # ==== Returns
+      # String
+      def controller_path
+        @controller_path ||= name && name.sub(/Controller$/, '').underscore
+      end
     end
 
     abstract!
@@ -96,6 +106,11 @@ module AbstractController
       process_action(action_name, *args)
     end
 
+    # Delegates to the class' #controller_path
+    def controller_path
+      self.class.controller_path
+    end
+
   private
     # Returns true if the name can be considered an action. This can
     # be overridden in subclasses to modify the semantics of what

actionpack/lib/abstract_controller/layouts.rb

@@ -1,4 +1,160 @@
 module AbstractController
+  # Layouts reverse the common pattern of including shared headers and footers in many templates to isolate changes in
+  # repeated setups. The inclusion pattern has pages that look like this:
+  #
+  #   <%= render "shared/header" %>
+  #   Hello World
+  #   <%= render "shared/footer" %>
+  #
+  # This approach is a decent way of keeping common structures isolated from the changing content, but it's verbose
+  # and if you ever want to change the structure of these two includes, you'll have to change all the templates.
+  #
+  # With layouts, you can flip it around and have the common structure know where to insert changing content. This means
+  # that the header and footer are only mentioned in one place, like this:
+  #
+  #   // The header part of this layout
+  #   <%= yield %>
+  #   // The footer part of this layout
+  #
+  # And then you have content pages that look like this:
+  #
+  #    hello world
+  #
+  # At rendering time, the content page is computed and then inserted in the layout, like this:
+  #
+  #   // The header part of this layout
+  #   hello world
+  #   // The footer part of this layout
+  #
+  # == Accessing shared variables
+  #
+  # Layouts have access to variables specified in the content pages and vice versa. This allows you to have layouts with
+  # references that won't materialize before rendering time:
+  #
+  #   <h1><%= @page_title %></h1>
+  #   <%= yield %>
+  #
+  # ...and content pages that fulfill these references _at_ rendering time:
+  #
+  #    <% @page_title = "Welcome" %>
+  #    Off-world colonies offers you a chance to start a new life
+  #
+  # The result after rendering is:
+  #
+  #   <h1>Welcome</h1>
+  #   Off-world colonies offers you a chance to start a new life
+  #
+  # == Layout assignment
+  #
+  # You can either specify a layout declaratively (using the #layout class method) or give
+  # it the same name as your controller, and place it in <tt>app/views/layouts</tt>.
+  # If a subclass does not have a layout specified, it inherits its layout using normal Ruby inheritance.
+  #
+  # For instance, if you have PostsController and a template named <tt>app/views/layouts/posts.html.erb</tt>,
+  # that template will be used for all actions in PostsController and controllers inheriting
+  # from PostsController.
+  #
+  # If you use a module, for instance Weblog::PostsController, you will need a template named
+  # <tt>app/views/layouts/weblog/posts.html.erb</tt>.
+  #
+  # Since all your controllers inherit from ApplicationController, they will use
+  # <tt>app/views/layouts/application.html.erb</tt> if no other layout is specified
+  # or provided.
+  #
+  # == Inheritance Examples
+  #
+  #   class BankController < ActionController::Base
+  #     layout "bank_standard"
+  #
+  #   class InformationController < BankController
+  #
+  #   class TellerController < BankController
+  #     # teller.html.erb exists
+  #
+  #   class TillController < TellerController
+  #
+  #   class VaultController < BankController
+  #     layout :access_level_layout
+  #
+  #   class EmployeeController < BankController
+  #     layout nil
+  #
+  # The InformationController uses "bank_standard" inherited from the BankController, the VaultController overwrites
+  # and picks the layout dynamically, and the EmployeeController doesn't want to use a layout at all.
+  #
+  # The TellerController uses +teller.html.erb+, and TillController inherits that layout and
+  # uses it as well.
+  #
+  # == Types of layouts
+  #
+  # Layouts are basically just regular templates, but the name of this template needs not be specified statically. Sometimes
+  # you want to alternate layouts depending on runtime information, such as whether someone is logged in or not. This can
+  # be done either by specifying a method reference as a symbol or using an inline method (as a proc).
+  #
+  # The method reference is the preferred approach to variable layouts and is used like this:
+  #
+  #   class WeblogController < ActionController::Base
+  #     layout :writers_and_readers
+  #
+  #     def index
+  #       # fetching posts
+  #     end
+  #
+  #     private
+  #       def writers_and_readers
+  #         logged_in? ? "writer_layout" : "reader_layout"
+  #       end
+  #
+  # Now when a new request for the index action is processed, the layout will vary depending on whether the person accessing
+  # is logged in or not.
+  #
+  # If you want to use an inline method, such as a proc, do something like this:
+  #
+  #   class WeblogController < ActionController::Base
+  #     layout proc{ |controller| controller.logged_in? ? "writer_layout" : "reader_layout" }
+  #
+  # Of course, the most common way of specifying a layout is still just as a plain template name:
+  #
+  #   class WeblogController < ActionController::Base
+  #     layout "weblog_standard"
+  #
+  # If no directory is specified for the template name, the template will by default be looked for in <tt>app/views/layouts/</tt>.
+  # Otherwise, it will be looked up relative to the template root.
+  #
+  # == Conditional layouts
+  #
+  # If you have a layout that by default is applied to all the actions of a controller, you still have the option of rendering
+  # a given action or set of actions without a layout, or restricting a layout to only a single action or a set of actions. The
+  # <tt>:only</tt> and <tt>:except</tt> options can be passed to the layout call. For example:
+  #
+  #   class WeblogController < ActionController::Base
+  #     layout "weblog_standard", :except => :rss
+  #
+  #     # ...
+  #
+  #   end
+  #
+  # This will assign "weblog_standard" as the WeblogController's layout  except for the +rss+ action, which will not wrap a layout
+  # around the rendered view.
+  #
+  # Both the <tt>:only</tt> and <tt>:except</tt> condition can accept an arbitrary number of method references, so
+  # #<tt>:except => [ :rss, :text_only ]</tt> is valid, as is <tt>:except => :rss</tt>.
+  #
+  # == Using a different layout in the action render call
+  #
+  # If most of your actions use the same layout, it makes perfect sense to define a controller-wide layout as described above.
+  # Sometimes you'll have exceptions where one action wants to use a different layout than the rest of the controller.
+  # You can do this by passing a <tt>:layout</tt> option to the <tt>render</tt> call. For example:
+  #
+  #   class WeblogController < ActionController::Base
+  #     layout "weblog_standard"
+  #
+  #     def help
+  #       render :action => "help", :layout => "help"
+  #     end
+  #   end
+  #
+  # This will render the help action with the "help" layout instead of the controller-wide "weblog_standard" layout.
   module Layouts
     extend ActiveSupport::Concern
 
@@ -89,7 +245,7 @@ module AbstractController
       # ==== Returns
       # String:: A template name
       def _implied_layout_name
-        name && name.underscore
+        controller_path
       end
 
       # Takes the specified layout and creates a _layout method to be called

actionpack/lib/action_controller.rb

@@ -13,13 +13,11 @@ module ActionController
   autoload :Middleware
 
   autoload_under "metal" do
-    autoload :Benchmarking
     autoload :ConditionalGet
     autoload :Configuration
     autoload :Head
     autoload :Helpers
     autoload :HideActions
-    autoload :Layouts
     autoload :Logger
     autoload :MimeResponds
     autoload :RackDelegation

actionpack/lib/action_controller/base.rb

@@ -4,6 +4,7 @@ module ActionController
 
     include AbstractController::Callbacks
     include AbstractController::Logger
+    include AbstractController::Layouts
 
     include ActionController::Helpers
     include ActionController::HideActions
@@ -11,7 +12,6 @@ module ActionController
     include ActionController::Redirecting
     include ActionController::Rendering
     include ActionController::Renderers::All
-    include ActionController::Layouts
     include ActionController::ConditionalGet
     include ActionController::RackDelegation
     include ActionController::Logger

actionpack/lib/action_controller/metal.rb

@@ -28,21 +28,6 @@ module ActionController
       self.class.controller_name
     end
 
-    # Returns the full controller name, underscored, without the ending Controller.
-    # For instance, MyApp::MyPostsController would return "my_app/my_posts" for
-    # controller_name.
-    #
-    # ==== Returns
-    # String
-    def self.controller_path
-      @controller_path ||= name && name.sub(/Controller$/, '').underscore
-    end
-
-    # Delegates to the class' #controller_path
-    def controller_path
-      self.class.controller_path
-    end
-
     # The details below can be overridden to support a specific
     # Request and Response object. The default ActionController::Base
     # implementation includes RackDelegation, which makes a request

actionpack/lib/action_controller/metal/layouts.rb

@@ -1,171 +0,0 @@
-module ActionController
-  # Layouts reverse the common pattern of including shared headers and footers in many templates to isolate changes in
-  # repeated setups. The inclusion pattern has pages that look like this:
-  #
-  #   <%= render "shared/header" %>
-  #   Hello World
-  #   <%= render "shared/footer" %>
-  #
-  # This approach is a decent way of keeping common structures isolated from the changing content, but it's verbose
-  # and if you ever want to change the structure of these two includes, you'll have to change all the templates.
-  #
-  # With layouts, you can flip it around and have the common structure know where to insert changing content. This means
-  # that the header and footer are only mentioned in one place, like this:
-  #
-  #   // The header part of this layout
-  #   <%= yield %>
-  #   // The footer part of this layout
-  #
-  # And then you have content pages that look like this:
-  #
-  #    hello world
-  #
-  # At rendering time, the content page is computed and then inserted in the layout, like this:
-  #
-  #   // The header part of this layout
-  #   hello world
-  #   // The footer part of this layout
-  #
-  # == Accessing shared variables
-  #
-  # Layouts have access to variables specified in the content pages and vice versa. This allows you to have layouts with
-  # references that won't materialize before rendering time:
-  #
-  #   <h1><%= @page_title %></h1>
-  #   <%= yield %>
-  #
-  # ...and content pages that fulfill these references _at_ rendering time:
-  #
-  #    <% @page_title = "Welcome" %>
-  #    Off-world colonies offers you a chance to start a new life
-  #
-  # The result after rendering is:
-  #
-  #   <h1>Welcome</h1>
-  #   Off-world colonies offers you a chance to start a new life
-  #
-  # == Layout assignment
-  #
-  # You can either specify a layout declaratively (using the #layout class method) or give
-  # it the same name as your controller, and place it in <tt>app/views/layouts</tt>.
-  # If a subclass does not have a layout specified, it inherits its layout using normal Ruby inheritance.
-  #
-  # For instance, if you have PostsController and a template named <tt>app/views/layouts/posts.html.erb</tt>,
-  # that template will be used for all actions in PostsController and controllers inheriting
-  # from PostsController.
-  #
-  # If you use a module, for instance Weblog::PostsController, you will need a template named
-  # <tt>app/views/layouts/weblog/posts.html.erb</tt>.
-  #
-  # Since all your controllers inherit from ApplicationController, they will use
-  # <tt>app/views/layouts/application.html.erb</tt> if no other layout is specified
-  # or provided.
-  #
-  # == Inheritance Examples
-  #
-  #   class BankController < ActionController::Base
-  #     layout "bank_standard"
-  #
-  #   class InformationController < BankController
-  #
-  #   class TellerController < BankController
-  #     # teller.html.erb exists
-  #
-  #   class TillController < TellerController
-  #
-  #   class VaultController < BankController
-  #     layout :access_level_layout
-  #
-  #   class EmployeeController < BankController
-  #     layout nil
-  #
-  # The InformationController uses "bank_standard" inherited from the BankController, the VaultController overwrites
-  # and picks the layout dynamically, and the EmployeeController doesn't want to use a layout at all.
-  #
-  # The TellerController uses +teller.html.erb+, and TillController inherits that layout and
-  # uses it as well.
-  #
-  # == Types of layouts
-  #
-  # Layouts are basically just regular templates, but the name of this template needs not be specified statically. Sometimes
-  # you want to alternate layouts depending on runtime information, such as whether someone is logged in or not. This can
-  # be done either by specifying a method reference as a symbol or using an inline method (as a proc).
-  #
-  # The method reference is the preferred approach to variable layouts and is used like this:
-  #
-  #   class WeblogController < ActionController::Base
-  #     layout :writers_and_readers
-  #
-  #     def index
-  #       # fetching posts
-  #     end
-  #
-  #     private
-  #       def writers_and_readers
-  #         logged_in? ? "writer_layout" : "reader_layout"
-  #       end
-  #
-  # Now when a new request for the index action is processed, the layout will vary depending on whether the person accessing
-  # is logged in or not.
-  #
-  # If you want to use an inline method, such as a proc, do something like this:
-  #
-  #   class WeblogController < ActionController::Base
-  #     layout proc{ |controller| controller.logged_in? ? "writer_layout" : "reader_layout" }
-  #
-  # Of course, the most common way of specifying a layout is still just as a plain template name:
-  #
-  #   class WeblogController < ActionController::Base
-  #     layout "weblog_standard"
-  #
-  # If no directory is specified for the template name, the template will by default be looked for in <tt>app/views/layouts/</tt>.
-  # Otherwise, it will be looked up relative to the template root.
-  #
-  # == Conditional layouts
-  #
-  # If you have a layout that by default is applied to all the actions of a controller, you still have the option of rendering
-  # a given action or set of actions without a layout, or restricting a layout to only a single action or a set of actions. The
-  # <tt>:only</tt> and <tt>:except</tt> options can be passed to the layout call. For example:
-  #
-  #   class WeblogController < ActionController::Base
-  #     layout "weblog_standard", :except => :rss
-  #
-  #     # ...
-  #
-  #   end
-  #
-  # This will assign "weblog_standard" as the WeblogController's layout  except for the +rss+ action, which will not wrap a layout
-  # around the rendered view.
-  #
-  # Both the <tt>:only</tt> and <tt>:except</tt> condition can accept an arbitrary number of method references, so
-  # #<tt>:except => [ :rss, :text_only ]</tt> is valid, as is <tt>:except => :rss</tt>.
-  #
-  # == Using a different layout in the action render call
-  #
-  # If most of your actions use the same layout, it makes perfect sense to define a controller-wide layout as described above.
-  # Sometimes you'll have exceptions where one action wants to use a different layout than the rest of the controller.
-  # You can do this by passing a <tt>:layout</tt> option to the <tt>render</tt> call. For example:
-  #
-  #   class WeblogController < ActionController::Base
-  #     layout "weblog_standard"
-  #
-  #     def help
-  #       render :action => "help", :layout => "help"
-  #     end
-  #   end
-  #
-  # This will render the help action with the "help" layout instead of the controller-wide "weblog_standard" layout.
-  module Layouts
-    extend ActiveSupport::Concern
-
-    include ActionController::Rendering
-    include AbstractController::Layouts
-
-    module ClassMethods
-      # If no layout is provided, look for a layout with this name.
-      def _implied_layout_name
-        controller_path
-      end
-    end
-  end
-end