#NEWLINE# @ register_computer ( 'background-position' ) #NEWLINE# def background_position( computer , name , values ) : #NEWLINE# #INDENT# 'Compute lengths in background-position.' #NEWLINE# return [ ( origin_x , length ( computer , name , pos_x ) , origin_y , length ( computer , name , pos_y ) ) for ( origin_x , pos_x , origin_y , pos_y ) in values ]