fun! g:get_xterm_pos ()"{{{

    if(!exists('$WINDOWID')) | return [] | endif

    let term_rect_info = system('xwininfo -id ' . $WINDOWID .

                \ '|grep "Absolute upper-left \(X\|Y\):"' .

                \ "|awk -F ':' '{print $2}'")

    let term_pos = split(term_rect_info)

    return term_pos

endfun"}}}

fun! g:update_pos_by_xterm (adjust)"{{{

    if(!has('gui_running')) | return | endif

    let term_pos = g:get_xterm_pos()

    if(term_pos == [])

        echoerr 'update failed...'

        return

    endif

    exe printf('winpos %d %d', term_pos[] + a:adjust[], term_pos[] + a:adjust[])

endfun"}}}

au GUIENTER * call g:update_pos_by_xterm([, ])