Moved sort_parts into Mail, updated mail requirement to 1.4.2

Gemfile

@@ -10,7 +10,7 @@ end
 gem "i18n", ">= 0.3.0"
 
 # AM
-gem "mail", ">= 1.4.1"
+gem "mail", ">= 1.4.2"
 
 # AR
 gem "arel", "0.2.pre", :git => "git://github.com/rails/arel.git"

actionmailer/CHANGELOG

 *Mail Integration
 
+* ActionMailer::Base :default_implicit_parts_order now is in the sequence of the order you want, no
+reversing of ordering takes place.  The default order now is text/plain, then text/enriched, then 
+text/html and then any other part that is not one of these three.
+
 * Mail does not have "quoted_body", "quoted_subject" etc.  All of these are accessed via body.encoded, 
   subject.encoded etc
 

actionmailer/lib/action_mailer.rb

@@ -24,6 +24,7 @@
 actionpack_path = File.expand_path('../../../actionpack/lib', __FILE__)
 $:.unshift(actionpack_path) if File.directory?(actionpack_path) && !$:.include?(actionpack_path)
 
+
 require 'action_controller'
 require 'action_view'
 
@@ -46,4 +47,4 @@ module Text
   autoload :Format, 'action_mailer/vendor/text_format'
 end
 
-require 'mail'
\ No newline at end of file
+require 'mail'

actionmailer/lib/action_mailer/base.rb

@@ -282,7 +282,13 @@ class Base < AbstractController::Base
     @@default_mime_version = "1.0"
     cattr_accessor :default_mime_version
 
-    @@default_implicit_parts_order = [ "text/html", "text/enriched", "text/plain" ]
+    # This specifies the order that the parts of a multipart email will be.  Usually you put
+    # text/plain at the top so someone without a MIME capable email reader can read the plain
+    # text of your email first.
+    #
+    # Any content type that is not listed here will be inserted in the order you add them to
+    # the email after the content types you list here.
+    @@default_implicit_parts_order = [ "text/plain", "text/enriched", "text/html" ]
     cattr_accessor :default_implicit_parts_order
 
     @@protected_instance_variables = %w(@parts @mail)
@@ -534,7 +540,6 @@ def create_parts #:nodoc:
 
           if @parts.size > 1
             @content_type = "multipart/alternative" if @content_type !~ /^multipart/
-            @parts = sort_parts(@parts, @implicit_parts_order)
           end
 
           # If this is a multipart e-mail add the mime_version if it is not
@@ -554,35 +559,6 @@ def create_inline_part(body, mime_type=nil) #:nodoc:
         )
       end
 
-      def sort_parts(parts, order = []) #:nodoc:
-        order = order.collect { |s| s.downcase }
-
-        parts = parts.sort do |a, b|
-          a_ct = a.content_type.string.downcase
-          b_ct = b.content_type.string.downcase
-
-          a_in = order.include? a_ct
-          b_in = order.include? b_ct
-
-          s = case
-          when a_in && b_in
-            order.index(a_ct) <=> order.index(b_ct)
-          when a_in
-            -1
-          when b_in
-            1
-          else
-            a_ct <=> b_ct
-          end
-
-          # reverse the ordering because parts that come last are displayed
-          # first in mail clients
-          (s * -1)
-        end
-
-        parts
-      end
-
       def create_mail #:nodoc:
         m = Mail.new
 
@@ -606,9 +582,12 @@ def create_mail #:nodoc:
           m.content_type([main_type, sub_type, ctype_attrs])
           m.body = @parts.first.body.encoded
         else
+          
           @parts.each do |p|
             m.add_part(p)
           end
+          m.body.set_sort_order(@implicit_parts_order)
+          m.body.sort_parts!
 
           if real_content_type =~ /multipart/
             ctype_attrs.delete "charset"

actionmailer/test/mail_service_test.rb

@@ -930,7 +930,6 @@ def test_explicitly_multipart_messages
     mail = TestMailer.create_explicitly_multipart_example(@recipient)
     assert_equal 3, mail.parts.length
     assert_equal 'multipart/mixed', mail.content_type.string
-
     assert_equal "text/plain", mail.parts[0].content_type.string
 
     assert_equal "text/html", mail.parts[1].content_type.string
@@ -938,7 +937,6 @@ def test_explicitly_multipart_messages
 
     assert_equal "image/jpeg", mail.parts[2].content_type.string
     assert_equal "attachment", mail.parts[2].content_disposition.disposition_type
-
     assert_equal "foo.jpg", mail.parts[2].content_disposition.filename
     assert_equal "foo.jpg", mail.parts[2].content_type.filename
     assert_nil mail.parts[2].charset
@@ -963,11 +961,11 @@ def test_implicitly_multipart_messages
     assert_equal 3, mail.parts.length
     assert_equal "1.0", mail.mime_version.to_s
     assert_equal "multipart/alternative", mail.content_type.string
-    assert_equal "application/x-yaml", mail.parts[0].content_type.string
+    assert_equal "text/plain", mail.parts[0].content_type.string
     assert_equal "utf-8", mail.parts[0].charset
-    assert_equal "text/plain", mail.parts[1].content_type.string
+    assert_equal "text/html", mail.parts[1].content_type.string
     assert_equal "utf-8", mail.parts[1].charset
-    assert_equal "text/html", mail.parts[2].content_type.string
+    assert_equal "application/x-yaml", mail.parts[2].content_type.string
     assert_equal "utf-8", mail.parts[2].charset
   end
 
@@ -976,9 +974,9 @@ def test_implicitly_multipart_messages_with_custom_order
 
     mail = TestMailer.create_implicitly_multipart_example(@recipient, nil, ["application/x-yaml", "text/plain"])
     assert_equal 3, mail.parts.length
-    assert_equal "text/html", mail.parts[0].content_type.string
+    assert_equal "application/x-yaml", mail.parts[0].content_type.string
     assert_equal "text/plain", mail.parts[1].content_type.string
-    assert_equal "application/x-yaml", mail.parts[2].content_type.string
+    assert_equal "text/html", mail.parts[2].content_type.string
   end
 
   def test_implicitly_multipart_messages_with_charset