dist/nvi/ip/ip_screen.c

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