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@@ -1,3 +1,8 @@
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+* Add layout functionality to mailers [Pratik]
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+
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+  Mailer layouts behaves just like controller layouts, except layout names need to
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+  have '_mailer' postfix for them to be automatically picked up.
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+
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 *2.1.0 (May 31st, 2008)*
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 * Fixed that a return-path header would be ignored #7572 [joost]

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@@ -246,7 +246,10 @@ module ActionMailer #:nodoc:
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   #   +implicit_parts_order+.
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   class Base
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     include AdvAttrAccessor, PartContainer
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-    include ActionController::UrlWriter if Object.const_defined?(:ActionController)
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+    if Object.const_defined?(:ActionController)
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+      include ActionController::UrlWriter
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+      include ActionController::Layout
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+    end
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     private_class_method :new #:nodoc:
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@@ -362,6 +365,7 @@ module ActionMailer #:nodoc:
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     # The mail object instance referenced by this mailer.
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     attr_reader :mail
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+    attr_reader :template_name, :default_template_name, :action_name
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     class << self
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       attr_writer :mailer_name
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@@ -530,6 +534,7 @@ module ActionMailer #:nodoc:
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         @content_type ||= @@default_content_type.dup
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         @implicit_parts_order ||= @@default_implicit_parts_order.dup
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         @template ||= method_name
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+        @default_template_name = @action_name = @template
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         @mailer_name ||= self.class.name.underscore
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         @parts ||= []
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         @headers ||= {}
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@@ -546,7 +551,22 @@ module ActionMailer #:nodoc:
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         if opts[:file] && (opts[:file] !~ /\// && !opts[:file].respond_to?(:render))
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           opts[:file] = "#{mailer_name}/#{opts[:file]}"
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         end
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-        initialize_template_class(body).render(opts)
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+
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+        begin
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+          old_template, @template = @template, initialize_template_class(body)
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+          layout = respond_to?(:pick_layout, true) ? pick_layout(opts) : false
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+          @template.render(opts.merge(:layout => layout))
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+        ensure
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+          @template = old_template
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+        end
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+      end
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+
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+      def default_template_format
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+        :html
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+      end
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+
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+      def candidate_for_layout?(options)
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+        !@template.send(:_exempt_from_layout?, default_template_name)
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       end
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       def template_root

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@@ -216,7 +216,7 @@ module ActionController #:nodoc:
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     # object). If the layout was defined without a directory, layouts is assumed. So <tt>layout "weblog/standard"</tt> will return
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     # weblog/standard, but <tt>layout "standard"</tt> will return layouts/standard.
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     def active_layout(passed_layout = nil)
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-      layout = passed_layout || self.class.default_layout(response.template.template_format)
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+      layout = passed_layout || self.class.default_layout(default_template_format)
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       active_layout = case layout
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         when String then layout
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         when Symbol then __send__(layout)
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@@ -276,5 +276,9 @@ module ActionController #:nodoc:
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       rescue ActionView::MissingTemplate
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         false
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       end
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+
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+      def default_template_format
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+        response.template.template_format
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+      end
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   end
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 end