scroll.c revision 1.8 1 /* $NetBSD: scroll.c,v 1.8 1997/07/22 07:37:02 mikel Exp $ */
2
3 /*
4 * Copyright (c) 1981, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by the University of
18 * California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36 #include <sys/cdefs.h>
37 #ifndef lint
38 #if 0
39 static char sccsid[] = "@(#)scroll.c 8.3 (Berkeley) 5/4/94";
40 #else
41 __RCSID("$NetBSD: scroll.c,v 1.8 1997/07/22 07:37:02 mikel Exp $");
42 #endif
43 #endif /* not lint */
44
45 #include "curses.h"
46
47 /*
48 * scroll --
49 * Scroll the window up a line.
50 */
51 int
52 scroll(win)
53 register WINDOW *win;
54 {
55 register int oy, ox;
56
57 #ifdef DEBUG
58 __CTRACE("scroll: (%0.2o)\n", win);
59 #endif
60
61 if (!(win->flags & __SCROLLOK))
62 return (ERR);
63
64 getyx(win, oy, ox);
65 wmove(win, 0, 0);
66 wdeleteln(win);
67 wmove(win, oy, ox);
68
69 if (win == curscr) {
70 putchar('\n');
71 if (!NONL)
72 win->curx = 0;
73 #ifdef DEBUG
74 __CTRACE("scroll: win == curscr\n");
75 #endif
76 }
77 return (OK);
78 }
79