source: trunk/third/nvi/ip/ip_screen.c @ 14302

/*-
 * Copyright (c) 1996
 *      Keith Bostic.  All rights reserved.
 *
 * See the LICENSE file for redistribution information.
 */

#include "config.h"

#ifndef lint
static const char sccsid[] = "@(#)ip_screen.c   8.2 (Berkeley) 10/13/96";
#endif /* not lint */

#include <sys/types.h>
#include <sys/queue.h>

#include <bitstring.h>
#include <stdio.h>

#include "../common/common.h"
#include "ip.h"

/*
 * ip_screen --
 *      Initialize/shutdown the IP screen.
 *
 * PUBLIC: int ip_screen __P((SCR *, u_int32_t));
 */
int
ip_screen(sp, flags)
        SCR *sp;
        u_int32_t flags;
{
        GS *gp;
        IP_PRIVATE *ipp;

        gp = sp->gp;
        ipp = IPP(sp);

        /* See if the current information is incorrect. */
        if (F_ISSET(gp, G_SRESTART)) {
                if (ip_quit(gp))
                        return (1);
                F_CLR(gp, G_SRESTART);
        }
        
        /* See if we're already in the right mode. */
        if (LF_ISSET(SC_VI) && F_ISSET(ipp, IP_SCR_VI_INIT))
                return (0);

        /* Ex isn't possible. */
        if (LF_ISSET(SC_EX))
                return (1);

        /* Initialize terminal based information. */
        if (ip_term_init(sp)) 
                return (1);

        /* Put up the first file name. */
        if (ip_rename(sp))
                return (1);

        F_SET(ipp, IP_SCR_VI_INIT);
        return (0);
}

/*
 * ip_quit --
 *      Shutdown the screens.
 *
 * PUBLIC: int ip_quit __P((GS *));
 */
int
ip_quit(gp)
        GS *gp;
{
        IP_PRIVATE *ipp;
        int rval;

        /* Clean up the terminal mappings. */
        rval = ip_term_end(gp);

        ipp = GIPP(gp);
        F_CLR(ipp, IP_SCR_VI_INIT);

        return (rval);
}