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/*-
* Copyright (c) 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static char sccsid[] = "@(#)v_screen.c 8.10 (Berkeley) 3/8/94";
#endif /* not lint */
#include <sys/types.h>
#include <queue.h>
#include <sys/time.h>
#include <bitstring.h>
#include <limits.h>
#include <signal.h>
#include <stdio.h>
#include <termios.h>
#include <db.h>
#include <regex.h>
#include "vi.h"
#include "vcmd.h"
/*
* v_screen -- ^W
* Switch screens.
*/
int
v_screen(sp, ep, vp)
SCR *sp;
EXF *ep;
VICMDARG *vp;
{
/*
* Try for the next lower screen, or, go back to the first
* screen on the stack.
*/
if (sp->q.cqe_next != (void *)&sp->gp->dq)
sp->nextdisp = sp->q.cqe_next;
else if (sp->gp->dq.cqh_first == sp) {
msgq(sp, M_ERR, "No other screen to switch to.");
return (1);
} else
sp->nextdisp = sp->gp->dq.cqh_first;
/*
* Display the old screen's status line so the user can
* find the screen they want.
*/
(void)status(sp, ep, vp->m_start.lno, 0);
/* Save the old screen's cursor information. */
sp->frp->lno = sp->lno;
sp->frp->cno = sp->cno;
F_SET(sp->frp, FR_CURSORSET);
F_SET(sp, S_SSWITCH);
return (0);
}
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