Modified post_process to handle Thumbnail's new interface. Munged styles into preferred format.

lib/paperclip.rb

@@ -73,6 +73,11 @@ module Paperclip
     def included base #:nodoc:
       base.extend ClassMethods
     end
+
+    def processor name
+      name = name.to_s.camelize
+      Paperclip.const_get(name) if Paperclip.const_defined?(name)
+    end
   end
 
   class PaperclipError < StandardError #:nodoc:

lib/paperclip/attachment.rb

@@ -33,8 +33,9 @@ module Paperclip
       @validations       = options[:validations]
       @default_style     = options[:default_style]
       @storage           = options[:storage]
-      @whiny_thumbnails  = options[:whiny_thumbnails]
+      @whiny             = options[:whiny_thumbnails]
       @convert_options   = options[:convert_options] || {}
+      @processors        = [:thumbnail]
       @options           = options
       @queued_for_delete = []
       @queued_for_write  = {}
@@ -181,7 +182,7 @@ module Paperclip
                            attachment.original_filename.gsub(/#{File.extname(attachment.original_filename)}$/, "")
                          end,
         :extension    => lambda do |attachment,style| 
-                           ((style = attachment.styles[style]) && style.last) ||
+                           ((style = attachment.styles[style]) && style[:format]) ||
                            File.extname(attachment.original_filename).gsub(/^\.+/, "")
                          end,
         :id           => lambda{|attachment,style| attachment.instance.id },
@@ -255,9 +256,17 @@ module Paperclip
 
     def normalize_style_definition
       @styles.each do |name, args|
+        unless args.is_a? Hash
           dimensions, format = [args, nil].flatten[0..1]
-        format             = nil if format == ""
-        @styles[name]      = [dimensions, format]
+          format             = nil if format.blank?
+          @styles[name]      = {
+            :processors      => @processors,
+            :geometry        => dimensions,
+            :format          => format,
+            :whiny           => @whiny,
+            :convert_options => extra_options_for(name)
+          }
+        end
       end
     end
 
@@ -277,15 +286,12 @@ module Paperclip
       logger.info("[paperclip] Post-processing #{name}")
       @styles.each do |name, args|
         begin
-          dimensions, format = args
-          dimensions = dimensions.call(instance) if dimensions.respond_to? :call
-          @queued_for_write[name] = Thumbnail.make(@queued_for_write[:original], 
-                                                   dimensions,
-                                                   format, 
-                                                   extra_options_for(name),
-                                                   @whiny_thumbnails)
+          @queued_for_write[name] = @queued_for_write[:original]
+          args[:processors].each do |processor|
+            @queued_for_write[name] = Paperclip.processor(processor).make(@queued_for_write[name], args)
+          end
         rescue PaperclipError => e
-          (@errors[:processing] ||= []) << e.message if @whiny_thumbnails
+          (@errors[:processing] ||= []) << e.message if @whiny
         end
       end
       callback(:"after_#{name}_post_process")

test/attachment_test.rb

@@ -117,6 +117,7 @@ class AttachmentTest < Test::Unit::TestCase
                       :thumb => "-thumbnailize"
                     }
       @dummy = Dummy.new
+      @dummy.avatar
     end
 
     should "report the correct options when sent #extra_options_for(:thumb)" do
@@ -127,23 +128,9 @@ class AttachmentTest < Test::Unit::TestCase
       assert_equal "-do_stuff", @dummy.avatar.send(:extra_options_for, :large)
     end
 
-    context "when given a file" do
-      setup do
-        @file = File.new(File.join(File.dirname(__FILE__),
-                                   "fixtures",
-                                   "5k.png"), 'rb')
-        Paperclip::Thumbnail.stubs(:make)
-        [:thumb, :large].each do |style|
-          @dummy.avatar.stubs(:extra_options_for).with(style)
-        end
-      end
-
-      [:thumb, :large].each do |style|
-        should "call extra_options_for(#{style})" do
-          @dummy.avatar.expects(:extra_options_for).with(style)
-          @dummy.avatar = @file
-        end
-      end
+    before_should "call extra_options_for(:thumb/:large)" do
+      Paperclip::Attachment.any_instance.expects(:extra_options_for).with(:thumb)
+      Paperclip::Attachment.any_instance.expects(:extra_options_for).with(:large)
     end
   end
 

test/paperclip_test.rb

@@ -10,6 +10,14 @@ class PaperclipTest < Test::Unit::TestCase
     end
   end
 
+  should "return nil when sent #processor and the name of a class that doesn't exist" do
+    assert_nil Paperclip.processor(:boogey_man)
+  end
+
+  should "return a class when sent #processor and the name of a class under Paperclip" do
+    assert_equal ::Paperclip::Thumbnail, Paperclip.processor(:thumbnail)
+  end
+
   context "Paperclip.bit_bucket" do
     context "on systems without /dev/null" do
       setup do