ex/ex_screen.c

   1 /*-
   2  * Copyright (c) 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  * Copyright (c) 1993, 1994, 1995, 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: ex_screen.c,v 10.11 1996/06/29 12:27:15 bostic Exp $ (Berkeley) $Date: 1996/06/29 12:27:15 $";
  14 #endif /* not lint */
  15
  16 #include <sys/types.h>
  17 #include <sys/queue.h>
  18 #include <sys/time.h>
  19
  20 #include <bitstring.h>
  21 #include <limits.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25
  26 #include "../common/common.h"
  27 #include "../vi/vi.h"
  28
  29 /*
  30  * ex_bg --     :bg
  31  *      Hide the screen.
  32  *
  33  * PUBLIC: int ex_bg __P((SCR *, EXCMD *));
  34  */
  35 int
  36 ex_bg(sp, cmdp)
  37         SCR *sp;
  38         EXCMD *cmdp;
  39 {
  40         return (vs_bg(sp));
  41 }
  42
  43 /*
  44  * ex_fg --     :fg [file]
  45  *      Show the screen.
  46  *
  47  * PUBLIC: int ex_fg __P((SCR *, EXCMD *));
  48  */
  49 int
  50 ex_fg(sp, cmdp)
  51         SCR *sp;
  52         EXCMD *cmdp;
  53 {
  54         SCR *nsp;
  55         int newscreen;
  56
  57         newscreen = F_ISSET(cmdp, E_NEWSCREEN);
  58         if (vs_fg(sp, &nsp, cmdp->argc ? cmdp->argv[0]->bp : NULL, newscreen))
  59                 return (1);
  60
  61         /* Set up the switch. */
  62         if (newscreen) {
  63                 sp->nextdisp = nsp;
  64                 F_SET(sp, SC_SSWITCH);
  65         }
  66         return (0);
  67 }
  68
  69 /*
  70  * ex_resize -- :resize [+-]rows
  71  *      Change the screen size.
  72  *
  73  * PUBLIC: int ex_resize __P((SCR *, EXCMD *));
  74  */
  75 int
  76 ex_resize(sp, cmdp)
  77         SCR *sp;
  78         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(sp)
 108         SCR *sp;
 109 {
 110         GS *gp;
 111         SCR *tsp;
 112         int cnt, col, len, sep;
 113
 114         gp = sp->gp;
 115         if ((tsp = gp->hq.cqh_first) == (void *)&gp->hq) {
 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 != (void *)&gp->hq && !INTERRUPTED(sp);
 122             tsp = tsp->q.cqe_next) {
 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 }