contrib/nvi2/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 #include <sys/types.h>
  13 #include <sys/queue.h>
  14 #include <sys/time.h>
  15
  16 #include <bitstring.h>
  17 #include <limits.h>
  18 #include <stdio.h>
  19 #include <stdlib.h>
  20 #include <string.h>
  21
  22 #include "../common/common.h"
  23 #include "../vi/vi.h"
  24
  25 /*
  26  * ex_bg --     :bg
  27  *      Hide the screen.
  28  *
  29  * PUBLIC: int ex_bg(SCR *, EXCMD *);
  30  */
  31 int
  32 ex_bg(SCR *sp, EXCMD *cmdp)
  33 {
  34         return (vs_bg(sp));
  35 }
  36
  37 /*
  38  * ex_fg --     :fg [file]
  39  *      Show the screen.
  40  *
  41  * PUBLIC: int ex_fg(SCR *, EXCMD *);
  42  */
  43 int
  44 ex_fg(SCR *sp, EXCMD *cmdp)
  45 {
  46         SCR *nsp;
  47         int newscreen;
  48
  49         newscreen = F_ISSET(cmdp, E_NEWSCREEN);
  50         if (vs_fg(sp, &nsp, cmdp->argc ? cmdp->argv[0]->bp : NULL, newscreen))
  51                 return (1);
  52
  53         /* Set up the switch. */
  54         if (newscreen) {
  55                 sp->nextdisp = nsp;
  56                 F_SET(sp, SC_SSWITCH);
  57         }
  58         return (0);
  59 }
  60
  61 /*
  62  * ex_resize -- :resize [+-]rows
  63  *      Change the screen size.
  64  *
  65  * PUBLIC: int ex_resize(SCR *, EXCMD *);
  66  */
  67 int
  68 ex_resize(SCR *sp, EXCMD *cmdp)
  69 {
  70         adj_t adj;
  71
  72         switch (FL_ISSET(cmdp->iflags,
  73             E_C_COUNT | E_C_COUNT_NEG | E_C_COUNT_POS)) {
  74         case E_C_COUNT:
  75                 adj = A_SET;
  76                 break;
  77         case E_C_COUNT | E_C_COUNT_NEG:
  78                 adj = A_DECREASE;
  79                 break;
  80         case E_C_COUNT | E_C_COUNT_POS:
  81                 adj = A_INCREASE;
  82                 break;
  83         default:
  84                 ex_emsg(sp, cmdp->cmd->usage, EXM_USAGE);
  85                 return (1);
  86         }
  87         return (vs_resize(sp, cmdp->count, adj));
  88 }
  89
  90 /*
  91  * ex_sdisplay --
  92  *      Display the list of screens.
  93  *
  94  * PUBLIC: int ex_sdisplay(SCR *);
  95  */
  96 int
  97 ex_sdisplay(SCR *sp)
  98 {
  99         GS *gp;
 100         SCR *tsp;
 101         int cnt, col, len, sep;
 102
 103         gp = sp->gp;
 104         if ((tsp = TAILQ_FIRST(gp->hq)) == NULL) {
 105                 msgq(sp, M_INFO, "149|No background screens to display");
 106                 return (0);
 107         }
 108
 109         col = len = sep = 0;
 110         for (cnt = 1; tsp != NULL && !INTERRUPTED(sp);
 111             tsp = TAILQ_NEXT(tsp, q)) {
 112                 col += len = strlen(tsp->frp->name) + sep;
 113                 if (col >= sp->cols - 1) {
 114                         col = len;
 115                         sep = 0;
 116                         (void)ex_puts(sp, "\n");
 117                 } else if (cnt != 1) {
 118                         sep = 1;
 119                         (void)ex_puts(sp, " ");
 120                 }
 121                 (void)ex_puts(sp, tsp->frp->name);
 122                 ++cnt;
 123         }
 124         if (!INTERRUPTED(sp))
 125                 (void)ex_puts(sp, "\n");
 126         return (0);
 127 }