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

   1 /*      $NetBSD: ex_screen.c,v 1.4 2014/01/26 21:43:45 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 #include <sys/cdefs.h>
  14 #if 0
  15 #ifndef lint
  16 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 ";
  17 #endif /* not lint */
  18 #else
  19 __RCSID("$NetBSD: ex_screen.c,v 1.4 2014/01/26 21:43:45 christos Exp $");
  20 #endif
  21
  22 #include <sys/types.h>
  23 #include <sys/queue.h>
  24 #include <sys/time.h>
  25
  26 #include <bitstring.h>
  27 #include <limits.h>
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <string.h>
  31
  32 #include "../common/common.h"
  33 #include "../vi/vi.h"
  34
  35 /*
  36  * ex_bg --     :bg
  37  *      Hide the screen.
  38  *
  39  * PUBLIC: int ex_bg __P((SCR *, EXCMD *));
  40  */
  41 int
  42 ex_bg(SCR *sp, EXCMD *cmdp)
  43 {
  44         return (vs_bg(sp));
  45 }
  46
  47 /*
  48  * ex_fg --     :fg [file]
  49  *      Show the screen.
  50  *
  51  * PUBLIC: int ex_fg __P((SCR *, EXCMD *));
  52  */
  53 int
  54 ex_fg(SCR *sp, EXCMD *cmdp)
  55 {
  56         SCR *nsp;
  57         int newscreen;
  58
  59         newscreen = F_ISSET(cmdp, E_NEWSCREEN);
  60         if (vs_fg(sp, &nsp, cmdp->argc ? cmdp->argv[0]->bp : NULL, newscreen))
  61                 return (1);
  62
  63         /* Set up the switch. */
  64         if (newscreen) {
  65                 sp->nextdisp = nsp;
  66                 F_SET(sp, SC_SSWITCH);
  67         }
  68         return (0);
  69 }
  70
  71 /*
  72  * ex_resize -- :resize [+-]rows
  73  *      Change the screen size.
  74  *
  75  * PUBLIC: int ex_resize __P((SCR *, EXCMD *));
  76  */
  77 int
  78 ex_resize(SCR *sp, EXCMD *cmdp)
  79 {
  80         adj_t adj;
  81
  82         switch (FL_ISSET(cmdp->iflags,
  83             E_C_COUNT | E_C_COUNT_NEG | E_C_COUNT_POS)) {
  84         case E_C_COUNT:
  85                 adj = A_SET;
  86                 break;
  87         case E_C_COUNT | E_C_COUNT_NEG:
  88                 adj = A_DECREASE;
  89                 break;
  90         case E_C_COUNT | E_C_COUNT_POS:
  91                 adj = A_INCREASE;
  92                 break;
  93         default:
  94                 ex_emsg(sp, cmdp->cmd->usage, EXM_USAGE);
  95                 return (1);
  96         }
  97         return (vs_resize(sp, cmdp->count, adj));
  98 }
  99
 100 /*
 101  * ex_sdisplay --
 102  *      Display the list of screens.
 103  *
 104  * PUBLIC: int ex_sdisplay __P((SCR *));
 105  */
 106 int
 107 ex_sdisplay(SCR *sp)
 108 {
 109         GS *gp;
 110         SCR *tsp;
 111         int cnt, sep;
 112         size_t col, len;
 113
 114         gp = sp->gp;
 115         if ((tsp = TAILQ_FIRST(&gp->hq)) == NULL) {
 116                 msgq(sp, M_INFO, "149|No background screens to display");
 117                 return (0);
 118         }
 119
 120         col = len = sep = 0;
 121         for (cnt = 1; tsp != NULL && !INTERRUPTED(sp);
 122             tsp = TAILQ_NEXT(tsp, q)) {
 123                 col += len = strlen(tsp->frp->name) + sep;
 124                 if (col >= sp->cols - 1) {
 125                         col = len;
 126                         sep = 0;
 127                         (void)ex_puts(sp, "\n");
 128                 } else if (cnt != 1) {
 129                         sep = 1;
 130                         (void)ex_puts(sp, " ");
 131                 }
 132                 (void)ex_puts(sp, tsp->frp->name);
 133                 ++cnt;
 134         }
 135         if (!INTERRUPTED(sp))
 136                 (void)ex_puts(sp, "\n");
 137         return (0);
 138 }