Desktop Picture.dropzone

#!/usr/bin/ruby

# Dropzone Destination Info
# Name: Desktop Picture
# Description: A dropped image will be set as the current desktop background.  For second, third, and fourth monitors, hold down Command, Option, and Control respectively.
# Handles: NSFilenamesPboardType
# Events: Dragged
# KeyModifiers: Command, Option, Control
# Creator: cockscomb.info extended by NovaStorm Software
# 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)

    if ENV['KEY_MODIFIERS'] == "Command"
        %x(osascript -e 'tell application "System Events"\n  if second desktop exists then\n  set picture of second desktop to "#{file_path}"\n  end if\n  end tell')
        $dz.finish("2nd Desktop Changed!")
    elsif ENV['KEY_MODIFIERS'] == "Option"
        %x(osascript -e 'tell application "System Events"\n  if third desktop exists then\n  set picture of third desktop to "#{file_path}"\n  end if\n  end tell')
        $dz.finish("3rd Desktop Changed!")
    elsif ENV['KEY_MODIFIERS'] == "Control"
        %x(osascript -e 'tell application "System Events"\n  if fourth desktop exists then\n  set picture of fourth desktop to "#{file_path}"\n  end if\n  end tell')
        $dz.finish("4th Desktop Changed!")
    else
        %x(osascript -e 'tell application "System Events" to set picture of current desktop to "#{file_path}"')
        $dz.finish("Changed!")
    end
	
  else
  
    $dz.finish("Error")
	
  end
  
  $dz.url(false)
  
end