def _stop(self):
        """
        Restore the screen.
        """
        self.clear()

        signals.emit_signal(self, INPUT_DESCRIPTORS_CHANGED)

        self.signal_restore()

        fd = self._term_input_file.fileno()
        if os.isatty(fd):
            termios.tcsetattr(fd, termios.TCSADRAIN,
        self._old_termios_settings)

        self._mouse_tracking(False)

        move_cursor = ""
        if self._alternate_buffer:
            move_cursor = escape.RESTORE_NORMAL_BUFFER
        elif self.maxrow is not None:
            move_cursor = escape.set_cursor_position(
                0, self.maxrow)
        self.write(
            self._attrspec_to_escape(AttrSpec('',''))
            + escape.SI
            + move_cursor
            + escape.SHOW_CURSOR)

        if self._old_signal_keys:
            self.tty_signal_keys(*(self._old_signal_keys + (fd,)))

        super(Screen, self)._stop()

    def stop(self):
        """
        Restore the screen.
        """
        self.clear()
        if not self._started:
            return
        self.signal_restore()
        termios.tcsetattr(0, termios.TCSADRAIN, 
            self._old_termios_settings)
        move_cursor = ""
        if self.gpm_mev:
            self._stop_gpm_tracking()
        if self._alternate_buffer:
            move_cursor = escape.RESTORE_NORMAL_BUFFER
        elif self.maxrow is not None:
            move_cursor = escape.set_cursor_position( 
                0, self.maxrow)
        self._term_output_file.write(self._attrspec_to_escape(AttrSpec('','')) 
            + escape.SI
            + escape.MOUSE_TRACKING_OFF
            + escape.SHOW_CURSOR
            + move_cursor + "\n" + escape.SHOW_CURSOR )
        self._input_iter = self._fake_input_iter()

        if self._old_signal_keys:
            self.tty_signal_keys(*self._old_signal_keys)
        
        super(Screen, self).stop()

    def do_stop(self):
        self.clear()
        self.signal_restore()

        fd = self._term_input_file.fileno()
        if os.isatty(fd):
            termios.tcsetattr(fd, termios.TCSADRAIN, self._old_termios_settings)

        move_cursor = ""
        if self.gpm_mev:
            self._stop_gmp_tracking()
        if self.use_alternate_buffer:
            move_cursor = escape.RESTORE_NORMAL_BUFFER
        elif self.maxrow is not None:
            move_cursor = escape.set_cursor_position(0, self.maxrow)
        self._term_output_file.write(self._attrspec_to_escape(AttrSpec('', ''))
            + escape.SI
            + escape.MOUSE_TRACKING_OFF
            + escape.SHOW_CURSOR
            + move_cursor + "\n"
            + escape.SHOW_CURSOR
        )
        self._input_iter = self._fake_input_iter()

        if self._old_signal_keys:
            self.tty_signal_keys(*(self._old_signal_keys + (fd,)))

        self._started = False

 def set_cursor_position(x, y):
     if not partial_display():
         return escape.set_cursor_position(x, y)
     if cy > y:
         return ('\b' + escape.CURSOR_HOME_COL +
             escape.move_cursor_up(cy - y) +
             escape.move_cursor_right(x))
     return ('\b' + escape.CURSOR_HOME_COL +
         escape.move_cursor_down(y - cy) +
         escape.move_cursor_right(x))

 def set_cursor_row(y):
     if not partial_display():
         return escape.set_cursor_position(0, y)
     return escape.move_cursor_down(y - cy)

 def set_cursor_home():
     if not partial_display():
         return escape.set_cursor_position(0, 0)
     return (escape.CURSOR_HOME_COL + 
         escape.move_cursor_up(cy))