1 files changed, 1 insertions, 49 deletions
diff --git a/actionmailer/lib/action_mailer/preview.rb b/actionmailer/lib/action_mailer/preview.rb
index 4888eac345..25ad7ee721 100644
--- a/actionmailer/lib/action_mailer/preview.rb
+++ b/actionmailer/lib/action_mailer/preview.rb
@@ -1,57 +1,9 @@
 require 'active_support/descendants_tracker'
-require 'base64'
 
 module ActionMailer
   module Previews #:nodoc:
     extend ActiveSupport::Concern
 
-    class InlineAttachments #:nodoc:
-      PATTERN  = /src=(?:"cid:[^"]+"|'cid:[^']+')/i
-
-      include Base64
-
-      attr_reader :message
-
-      def self.previewing_email(message)
-        new(message).transform!
-      end
-
-      def initialize(message)
-        @message = message
-      end
-
-      def transform!
-        return message if html_part.blank?
-
-        html_source.gsub!(PATTERN) do |match|
-          if part = find_part(match[9..-2])
-            %[src="#{data_url(part)}"]
-          else
-            match
-          end
-        end
-
-        message
-      end
-
-      private
-        def html_part
-          @html_part ||= message.html_part
-        end
-
-        def html_source
-          html_part.body.raw_source
-        end
-
-        def data_url(part)
-          "data:#{part.mime_type};base64,#{urlsafe_encode64(part.body.raw_source)}"
-        end
-
-        def find_part(cid)
-          message.all_parts.find{ |p| p.attachment? && p.cid == cid }
-        end
-    end
-
     included do
       # Set the location of mailer previews through app configuration:
       #
@@ -69,7 +21,7 @@ module ActionMailer
 
       # :nodoc:
       mattr_accessor :preview_interceptors, instance_writer: false
-      self.preview_interceptors = [ActionMailer::Previews::InlineAttachments]
+      self.preview_interceptors = [ActionMailer::InlinePreviewInterceptor]
     end
 
     module ClassMethods