usr/src/lib/libcurses/scroll.c

/*
 * Copyright (c) 1981 Regents of the University of California.
 * All rights reserved.
 *
 * %sccs.include.redist.c%
 */

#ifndef lint
static char sccsid[] = "@(#)scroll.c    5.12 (Berkeley) %G%";
#endif /* not lint */

#include <curses.h>
#include <termios.h>

/*
 * scroll --
 *      Scroll the window up a line.
 */
int
scroll(win)
        register WINDOW *win;
{
        register int oy, ox;

#ifdef DEBUG
        __CTRACE("scroll: (%0.2o)\n", win);
#endif

        if (!(win->flags & __SCROLLOK))
                return (ERR);

        getyx(win, oy, ox);
        wmove(win, 0, 0);
        wdeleteln(win);
        wmove(win, oy, ox);

        if (win == curscr) {
                putchar('\n');
                if (__orig_termios.c_oflag & ONLCR)
                        win->curx = 0;
#ifdef DEBUG
                __CTRACE("scroll: win == curscr\n");
#endif
        }
        return (OK);
}