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 10.12 2001/06/25 15:19:19 skimo Exp $ (Berkeley) $Date: 2001/06/25 15:19:19 $";
  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(SCR *sp, EXCMD *cmdp)
  37 {
  38         return (vs_bg(sp));
  39 }
  40
  41 /*
  42  * ex_fg --     :fg [file]
  43  *      Show the screen.
  44  *
  45  * PUBLIC: int ex_fg __P((SCR *, EXCMD *));
  46  */
  47 int
  48 ex_fg(SCR *sp, EXCMD *cmdp)
  49 {
  50         SCR *nsp;
  51         int newscreen;
  52
  53         newscreen = F_ISSET(cmdp, E_NEWSCREEN);
  54         if (vs_fg(sp, &nsp, cmdp->argc ? cmdp->argv[0]->bp : NULL, newscreen))
  55                 return (1);
  56
  57         /* Set up the switch. */
  58         if (newscreen) {
  59                 sp->nextdisp = nsp;
  60                 F_SET(sp, SC_SSWITCH);
  61         }
  62         return (0);
  63 }
  64
  65 /*
  66  * ex_resize -- :resize [+-]rows
  67  *      Change the screen size.
  68  *
  69  * PUBLIC: int ex_resize __P((SCR *, EXCMD *));
  70  */
  71 int
  72 ex_resize(SCR *sp, EXCMD *cmdp)
  73 {
  74         adj_t adj;
  75
  76         switch (FL_ISSET(cmdp->iflags,
  77             E_C_COUNT | E_C_COUNT_NEG | E_C_COUNT_POS)) {
  78         case E_C_COUNT:
  79                 adj = A_SET;
  80                 break;
  81         case E_C_COUNT | E_C_COUNT_NEG:
  82                 adj = A_DECREASE;
  83                 break;
  84         case E_C_COUNT | E_C_COUNT_POS:
  85                 adj = A_INCREASE;
  86                 break;
  87         default:
  88                 ex_emsg(sp, cmdp->cmd->usage, EXM_USAGE);
  89                 return (1);
  90         }
  91         return (vs_resize(sp, cmdp->count, adj));
  92 }
  93
  94 /*
  95  * ex_sdisplay --
  96  *      Display the list of screens.
  97  *
  98  * PUBLIC: int ex_sdisplay __P((SCR *));
  99  */
 100 int
 101 ex_sdisplay(SCR *sp)
 102 {
 103         GS *gp;
 104         SCR *tsp;
 105         int cnt, col, len, sep;
 106
 107         gp = sp->gp;
 108         if ((tsp = gp->hq.cqh_first) == (void *)&gp->hq) {
 109                 msgq(sp, M_INFO, "149|No background screens to display");
 110                 return (0);
 111         }
 112
 113         col = len = sep = 0;
 114         for (cnt = 1; tsp != (void *)&gp->hq && !INTERRUPTED(sp);
 115             tsp = tsp->q.cqe_next) {
 116                 col += len = strlen(tsp->frp->name) + sep;
 117                 if (col >= sp->cols - 1) {
 118                         col = len;
 119                         sep = 0;
 120                         (void)ex_puts(sp, "\n");
 121                 } else if (cnt != 1) {
 122                         sep = 1;
 123                         (void)ex_puts(sp, " ");
 124                 }
 125                 (void)ex_puts(sp, tsp->frp->name);
 126                 ++cnt;
 127         }
 128         if (!INTERRUPTED(sp))
 129                 (void)ex_puts(sp, "\n");
 130         return (0);
 131 }