external/bsd/nvi/dist/ip/ip_screen.c

   1 /*      $NetBSD: ip_screen.c,v 1.3 2014/01/26 21:43:45 christos Exp $   */
   2 /*-
   3  * Copyright (c) 1996
   4  *      Keith Bostic.  All rights reserved.
   5  *
   6  * See the LICENSE file for redistribution information.
   7  */
   8
   9 #include "config.h"
  10
  11 #include <sys/cdefs.h>
  12 #if 0
  13 #ifndef lint
  14 static const char sccsid[] = "Id: ip_screen.c,v 8.8 2001/06/25 15:19:24 skimo Exp  (Berkeley) Date: 2001/06/25 15:19:24 ";
  15 #endif /* not lint */
  16 #else
  17 __RCSID("$NetBSD: ip_screen.c,v 1.3 2014/01/26 21:43:45 christos Exp $");
  18 #endif
  19
  20 #include <sys/types.h>
  21 #include <sys/queue.h>
  22
  23 #include <bitstring.h>
  24 #include <stdio.h>
  25
  26 #include "../common/common.h"
  27 #include "../ipc/ip.h"
  28
  29 /*
  30  * ip_screen --
  31  *      Initialize/shutdown the IP screen.
  32  *
  33  * PUBLIC: int ip_screen __P((SCR *, u_int32_t));
  34  */
  35 int
  36 ip_screen(SCR *sp, u_int32_t flags)
  37 {
  38         GS *gp;
  39         IP_PRIVATE *ipp;
  40
  41         gp = sp->gp;
  42         ipp = IPP(sp);
  43
  44         /* See if the current information is incorrect. */
  45         if (F_ISSET(gp, G_SRESTART)) {
  46                 if (ip_quit(sp->wp))
  47                         return (1);
  48                 F_CLR(gp, G_SRESTART);
  49         }
  50
  51         /* See if we're already in the right mode. */
  52         if ((LF_ISSET(SC_EX) && F_ISSET(sp, SC_SCR_EX)) ||
  53             (LF_ISSET(SC_VI) && F_ISSET(sp, SC_SCR_VI)))
  54                 return (0);
  55
  56         /* Ex isn't possible if there is no terminal. */
  57         if (LF_ISSET(SC_EX) && ipp->t_fd == -1)
  58                 return (1);
  59
  60         if (F_ISSET(sp, SC_SCR_EX))
  61                 F_CLR(sp, SC_SCR_EX);
  62
  63         if (F_ISSET(sp, SC_SCR_VI))
  64                 F_CLR(sp, SC_SCR_VI);
  65
  66         if (LF_ISSET(SC_EX)) {
  67                 F_SET(ipp, IP_IN_EX);
  68         } else {
  69                 /* Initialize terminal based information. */
  70                 if (ip_term_init(sp))
  71                         return (1);
  72
  73                 F_CLR(ipp, IP_IN_EX);
  74                 F_SET(ipp, IP_SCR_VI_INIT);
  75         }
  76         return (0);
  77 }
  78
  79 /*
  80  * ip_quit --
  81  *      Shutdown the screens.
  82  *
  83  * PUBLIC: int ip_quit __P((WIN *));
  84  */
  85 int
  86 ip_quit(WIN *wp)
  87 {
  88         IP_PRIVATE *ipp;
  89         int rval;
  90
  91         /* Clean up the terminal mappings. */
  92         rval = ip_term_end(wp->gp);
  93
  94         ipp = WIPP(wp);
  95         F_CLR(ipp, IP_SCR_VI_INIT);
  96
  97         return (rval);
  98 }