Refactor multiple parts logic and move Utils to PartContainer.

actionmailer/lib/action_mailer/base.rb

@@ -253,7 +253,7 @@ module ActionMailer #:nodoc:
   #   and appear last in the mime encoded message. You can also pick a different order from inside a method with
   #   +implicit_parts_order+.
   class Base < AbstractController::Base
-    include PartContainer, Quoting, Utils
+    include PartContainer, Quoting
     extend  AdvAttrAccessor
 
     include AbstractController::Rendering
@@ -454,7 +454,7 @@ def process(method_name, *args) #:nodoc:
                                     :default => method_name.humanize)
 
       # Build the mail object itself
-      @mail = create_mail
+      create_mail
     end
 
     # Delivers a TMail::Mail object. By default, it delivers the cached mail
@@ -582,15 +582,7 @@ def create_mail
           m.set_content_type(real_content_type, nil, ctype_attrs)
           m.body = normalize_new_lines(@parts.first.body)
         else
-          @parts.each do |p|
-            part = (TMail::Mail === p ? p : p.to_mail(self))
-            m.parts << part
-          end
-
-          if real_content_type =~ /multipart/
-            ctype_attrs.delete "charset"
-            m.set_content_type(real_content_type, nil, ctype_attrs)
-          end
+          setup_multiple_parts(m, real_content_type, ctype_attrs)
         end
 
         @mail = m

actionmailer/lib/action_mailer/part.rb

@@ -4,7 +4,7 @@ module ActionMailer
   # and add them to the +parts+ list of the mailer, it is easier
   # to use the helper methods in ActionMailer::PartContainer.
   class Part
-    include PartContainer, Utils
+    include PartContainer
     extend  AdvAttrAccessor
 
     # Represents the body of the part, as a string. This should not be a
@@ -83,16 +83,8 @@ def to_mail(defaults)
           @parts.unshift Part.new(:charset => charset, :body => @body, :content_type => 'text/plain')
           @body = nil
         end
-          
-        @parts.each do |p|
-          prt = (TMail::Mail === p ? p : p.to_mail(defaults))
-          part.parts << prt
-        end
-        
-        if real_content_type =~ /multipart/
-          ctype_attrs.delete 'charset'
-          part.set_content_type(real_content_type, nil, ctype_attrs)
-        end
+
+        setup_multiple_parts(part, real_content_type, ctype_attrs)
       end
 
       headers.each { |k,v| part[k] = v }

actionmailer/lib/action_mailer/part_container.rb

@@ -39,8 +39,24 @@ def attachment(params, &block)
     end
 
     private
-    
-      def parse_content_type(defaults=nil)
+
+      def normalize_new_lines(text) #:nodoc:
+        text.to_s.gsub(/\r\n?/, "\n")
+      end
+
+      def setup_multiple_parts(mailer, real_content_type, ctype_attrs) #:nodoc:
+        @parts.each do |p|
+          part = (TMail::Mail === p ? p : p.to_mail(self))
+          mailer.parts << part
+        end
+
+        if real_content_type =~ /multipart/
+          ctype_attrs.delete "charset"
+          mailer.set_content_type(real_content_type, nil, ctype_attrs)
+        end
+      end
+
+      def parse_content_type(defaults=nil) #:nodoc:
         if content_type.blank? 
           return defaults                                                ? 
             [ defaults.content_type, { 'charset' => defaults.charset } ] : 

actionmailer/lib/action_mailer/utils.rb

-module ActionMailer
-  module Utils #:nodoc:
-    def normalize_new_lines(text)
-      text.to_s.gsub(/\r\n?/, "\n")
-    end
-  end
-end