Desktop Picture.dropzone

#!/usr/bin/ruby

# Dropzone Destination Info
# Name: Desktop Picture
# Description: A dropped image will be set as the current desktop background.
# Handles: NSFilenamesPboardType
# Events: Dragged
# Creator: cockscomb.info
# URL: http://cockscomb.info
# IconURL: http://aptonic.com/destinations/icons/desktop.png

def dragged

  $dz.determinate(false)
  
  file_path = $items[0]
  file_name = File.basename(file_path)
  
  $dz.begin("Changing to #{file_name}...")
  
  allowed_exts = ["jpg", "jpeg", "gif", "tif", "tiff", "png", "bmp"]
  ext = File.extname(file_path).downcase[1..-1]
  
  if allowed_exts.include?(ext)
    
    %x(osascript -e 'tell application "System Events" to set picture of current desktop to "#{file_path}"')
	
    $dz.finish("Changed!")
	
  else
  
    $dz.finish("Error")
	
  end
  
  $dz.url(false)
  
end