external/bsd/nvi/dist/ex/ex_screen.c

   1 /*      $NetBSD: ex_screen.c,v 1.3 2013/11/25 22:43:46 christos Exp $ */
   2 /*-
   3  * Copyright (c) 1993, 1994
   4  *      The Regents of the University of California.  All rights reserved.
   5  * Copyright (c) 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 #ifndef lint
  14 static const char sccsid[] = "Id: ex_screen.c,v 10.12 2001/06/25 15:19:19 skimo Exp  (Berkeley) Date: 2001/06/25 15:19:19 ";
  15 #endif /* not lint */
  16
  17 #include <sys/types.h>
  18 #include <sys/queue.h>
  19 #include <sys/time.h>
  20
  21 #include <bitstring.h>
  22 #include <limits.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26
  27 #include "../common/common.h"
  28 #include "../vi/vi.h"
  29
  30 /*
  31  * ex_bg --     :bg
  32  *      Hide the screen.
  33  *
  34  * PUBLIC: int ex_bg __P((SCR *, EXCMD *));
  35  */
  36 int
  37 ex_bg(SCR *sp, EXCMD *cmdp)
  38 {
  39         return (vs_bg(sp));
  40 }
  41
  42 /*
  43  * ex_fg --     :fg [file]
  44  *      Show the screen.
  45  *
  46  * PUBLIC: int ex_fg __P((SCR *, EXCMD *));
  47  */
  48 int
  49 ex_fg(SCR *sp, EXCMD *cmdp)
  50 {
  51         SCR *nsp;
  52         int newscreen;
  53
  54         newscreen = F_ISSET(cmdp, E_NEWSCREEN);
  55         if (vs_fg(sp, &nsp, cmdp->argc ? cmdp->argv[0]->bp : NULL, newscreen))
  56                 return (1);
  57
  58         /* Set up the switch. */
  59         if (newscreen) {
  60                 sp->nextdisp = nsp;
  61                 F_SET(sp, SC_SSWITCH);
  62         }
  63         return (0);
  64 }
  65
  66 /*
  67  * ex_resize -- :resize [+-]rows
  68  *      Change the screen size.
  69  *
  70  * PUBLIC: int ex_resize __P((SCR *, EXCMD *));
  71  */
  72 int
  73 ex_resize(SCR *sp, EXCMD *cmdp)
  74 {
  75         adj_t adj;
  76
  77         switch (FL_ISSET(cmdp->iflags,
  78             E_C_COUNT | E_C_COUNT_NEG | E_C_COUNT_POS)) {
  79         case E_C_COUNT:
  80                 adj = A_SET;
  81                 break;
  82         case E_C_COUNT | E_C_COUNT_NEG:
  83                 adj = A_DECREASE;
  84                 break;
  85         case E_C_COUNT | E_C_COUNT_POS:
  86                 adj = A_INCREASE;
  87                 break;
  88         default:
  89                 ex_emsg(sp, cmdp->cmd->usage, EXM_USAGE);
  90                 return (1);
  91         }
  92         return (vs_resize(sp, cmdp->count, adj));
  93 }
  94
  95 /*
  96  * ex_sdisplay --
  97  *      Display the list of screens.
  98  *
  99  * PUBLIC: int ex_sdisplay __P((SCR *));
 100  */
 101 int
 102 ex_sdisplay(SCR *sp)
 103 {
 104         GS *gp;
 105         SCR *tsp;
 106         int cnt, sep;
 107         size_t col, len;
 108
 109         gp = sp->gp;
 110         if ((tsp = TAILQ_FIRST(&gp->hq)) == NULL) {
 111                 msgq(sp, M_INFO, "149|No background screens to display");
 112                 return (0);
 113         }
 114
 115         col = len = sep = 0;
 116         for (cnt = 1; tsp != NULL && !INTERRUPTED(sp);
 117             tsp = TAILQ_NEXT(tsp, q)) {
 118                 col += len = strlen(tsp->frp->name) + sep;
 119                 if (col >= sp->cols - 1) {
 120                         col = len;
 121                         sep = 0;
 122                         (void)ex_puts(sp, "\n");
 123                 } else if (cnt != 1) {
 124                         sep = 1;
 125                         (void)ex_puts(sp, " ");
 126                 }
 127                 (void)ex_puts(sp, tsp->frp->name);
 128                 ++cnt;
 129         }
 130         if (!INTERRUPTED(sp))
 131                 (void)ex_puts(sp, "\n");
 132         return (0);
 133 }