module Paperclip
  class Cropper < Thumbnail
    def initialize(file, options = {}, attachment = nil)
      super
      @current_geometry.width  = target.crop_w
      @current_geometry.height = target.crop_h
    end

    def target
      @attachment.instance
    end

    def transformation_command
      if @attachment.instance.cropping?
        crop_command = [
            "-crop",
            "#{target.crop_w}x" \
            "#{target.crop_h}+" \
            "#{target.crop_x}+" \
            "#{target.crop_y}",
            "+repage"
        ]
        crop_command + super
      else
        super
      end
    end
  end
end