added attachment_fu and made the set of changes

[selectricity-live] / vendor / plugins / attachment_fu / lib / technoweenie / attachment_fu / processors / mini_magick_processor.rb

diff --git a/vendor/plugins/attachment_fu/lib/technoweenie/attachment_fu/processors/mini_magick_processor.rb b/vendor/plugins/attachment_fu/lib/technoweenie/attachment_fu/processors/mini_magick_processor.rb
new file mode 100644 (file)
index 0000000..e5a534c
--- /dev/null
+++ b/vendor/plugins/attachment_fu/lib/technoweenie/attachment_fu/processors/mini_magick_processor.rb
@@ -0,0 +1,56 @@
+require 'mini_magick'
+module Technoweenie # :nodoc:
+  module AttachmentFu # :nodoc:
+    module Processors
+      module MiniMagickProcessor
+        def self.included(base)
+          base.send :extend, ClassMethods
+          base.alias_method_chain :process_attachment, :processing
+        end
+        
+        module ClassMethods
+          # Yields a block containing an MiniMagick Image for the given binary data.
+          def with_image(file, &block)
+            begin
+              binary_data = file.is_a?(MiniMagick::Image) ? file : MiniMagick::Image.from_file(file) unless !Object.const_defined?(:MiniMagick)
+            rescue
+              # Log the failure to load the image.
+              logger.debug("Exception working with image: #{$!}")
+              binary_data = nil
+            end
+            block.call binary_data if block && binary_data
+          ensure
+            !binary_data.nil?
+          end
+        end
+
+      protected
+        def process_attachment_with_processing
+          return unless process_attachment_without_processing
+          with_image do |img|
+            resize_image_or_thumbnail! img
+            self.width  = img[:width] if respond_to?(:width)
+            self.height = img[:height]  if respond_to?(:height)
+            callback_with_args :after_resize, img
+          end if image?
+        end
+
+        # Performs the actual resizing operation for a thumbnail
+        def resize_image(img, size)
+          size = size.first if size.is_a?(Array) && size.length == 1
+          if size.is_a?(Fixnum) || (size.is_a?(Array) && size.first.is_a?(Fixnum))
+            if size.is_a?(Fixnum)
+              size = [size, size]
+              img.resize(size.join('x'))
+            else
+              img.resize(size.join('x') + '!')
+            end
+          else
+            img.resize(size.to_s)
+          end
+          self.temp_path = img
+        end
+      end
+    end
+  end
+end
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