1 /* $NetBSD: v_screen.c,v 1.5 2014/01/26 21:43:45 christos Exp $ */
2 /*-
3 * Copyright (c) 1993, 1994
4 * The Regents of the University of California. All rights reserved.
5 * Copyright (c) 1992, 1993, 1994, 1995, 1996
6 * Keith Bostic. All rights reserved.
7 *
8 * See the LICENSE file for redistribution information.
9 */
10
11 #include "config.h"
12
13 #include <sys/cdefs.h>
14 #if 0
15 #ifndef lint
16 static const char sccsid[] = "Id: v_screen.c,v 10.12 2001/06/25 15:19:34 skimo Exp (Berkeley) Date: 2001/06/25 15:19:34 ";
17 #endif /* not lint */
18 #else
19 __RCSID("$NetBSD: v_screen.c,v 1.5 2014/01/26 21:43:45 christos Exp $");
20 #endif
21
22 #include <sys/types.h>
23 #include <sys/queue.h>
24 #include <sys/time.h>
25
26 #include <bitstring.h>
27 #include <limits.h>
28 #include <stdio.h>
29
30 #include "../common/common.h"
31 #include "vi.h"
32
33 /*
34 * v_screen -- ^W
35 * Switch screens.
36 *
37 * PUBLIC: int v_screen __P((SCR *, VICMD *));
38 */
39 int
v_screen(SCR * sp,VICMD * vp)40 v_screen(SCR *sp, VICMD *vp)
41 {
42 /*
43 * You can't leave a colon command-line edit window -- it's not that
44 * it won't work, but it gets real weird, real fast when you execute
45 * a colon command out of a window that was forked from a window that's
46 * now backgrounded... You get the idea.
47 */
48 if (F_ISSET(sp, SC_COMEDIT)) {
49 msgq(sp, M_ERR,
50 "308|Enter <CR> to execute a command, :q to exit");
51 return (1);
52 }
53
54 /*
55 * Try for the next lower screen, or, go back to the first
56 * screen on the stack.
57 */
58 if (TAILQ_NEXT(sp, q) != NULL)
59 sp->nextdisp = TAILQ_NEXT(sp, q);
60 else if (TAILQ_FIRST(&sp->wp->scrq) == sp) {
61 msgq(sp, M_ERR, "187|No other screen to switch to");
62 return (1);
63 } else
64 sp->nextdisp = TAILQ_FIRST(&sp->wp->scrq);
65
66 F_SET(sp->nextdisp, SC_STATUS);
67 F_SET(sp, SC_SSWITCH | SC_STATUS);
68 return (0);
69 }
70