/* Scroll up or down in the current screen. */

static void

vte_terminal_scroll_lines(VteTerminal *terminal, gint lines)

{

        glong destination;

        g_return_if_fail(VTE_IS_TERMINAL(terminal));

#ifdef VTE_DEBUG

        if (_vte_debug_on(VTE_DEBUG_IO)) {

                fprintf(stderr, "Scrolling %d lines.\n", lines);

        }

#endif

        /* Calculate the ideal position where we want to be before clamping. */

        destination = floor(gtk_adjustment_get_value(terminal->adjustment));

        destination += lines;

        /* Can't scroll past data we have. */

        destination = CLAMP(destination,

                            terminal->adjustment->lower,

                            terminal->adjustment->upper - terminal->row_count);

        /* Tell the scrollbar to adjust itself. */

        gtk_adjustment_set_value(terminal->adjustment, destination);

        /* Clear dingus match set. */

        vte_terminal_match_contents_clear(terminal);

        /* Notify viewers that the contents have changed. */

        vte_terminal_emit_contents_changed(terminal);

}

		case GDK_KP_Up:

                case GDK_Up:

                        if (terminal->pvt->modifiers & GDK_SHIFT_MASK) {

                                vte_terminal_scroll_lines(terminal, -1);

                                scrolled = TRUE;

                                handled = TRUE;

                                suppress_meta_esc = TRUE;

                        }

                        break;

                case GDK_KP_Down:

                case GDK_Down:

                        if (terminal->pvt->modifiers & GDK_SHIFT_MASK) {

                                vte_terminal_scroll_lines(terminal, 1);

                                scrolled = TRUE;

                                handled = TRUE;

                                suppress_meta_esc = TRUE;

                        }

                        break;