added attachment_fu and made the set of changes

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

diff --git a/vendor/plugins/attachment_fu/lib/technoweenie/attachment_fu/processors/rmagick_processor.rb b/vendor/plugins/attachment_fu/lib/technoweenie/attachment_fu/processors/rmagick_processor.rb
new file mode 100644 (file)
index 0000000..7999edb
--- /dev/null
+++ b/vendor/plugins/attachment_fu/lib/technoweenie/attachment_fu/processors/rmagick_processor.rb
@@ -0,0 +1,53 @@
+require 'RMagick'
+module Technoweenie # :nodoc:
+  module AttachmentFu # :nodoc:
+    module Processors
+      module RmagickProcessor
+        def self.included(base)
+          base.send :extend, ClassMethods
+          base.alias_method_chain :process_attachment, :processing
+        end
+        
+        module ClassMethods
+          # Yields a block containing an RMagick Image for the given binary data.
+          def with_image(file, &block)
+            begin
+              binary_data = file.is_a?(Magick::Image) ? file : Magick::Image.read(file).first unless !Object.const_defined?(:Magick)
+            rescue
+              # Log the failure to load the image.  This should match ::Magick::ImageMagickError
+              # but that would cause acts_as_attachment to require rmagick.
+              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.columns if respond_to?(:width)
+            self.height = img.rows    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 && !size.first.is_a?(Fixnum)
+          if size.is_a?(Fixnum) || (size.is_a?(Array) && size.first.is_a?(Fixnum))
+            size = [size, size] if size.is_a?(Fixnum)
+            img.thumbnail!(*size)
+          else
+            img.change_geometry(size.to_s) { |cols, rows, image| image.resize!(cols, rows) }
+          end
+          self.temp_path = write_to_temp_file(img.to_blob)
+        end
+      end
+    end
+  end
+end
\ No newline at end of file