dist/nvi/ex/ex_screen.c

   1 /*      $NetBSD: ex_screen.c,v 1.1.1.2 2008/05/18 14:31:17 aymeric Exp $ */
   2
   3 /*-
   4  * Copyright (c) 1993, 1994
   5  *      The Regents of the University of California.  All rights reserved.
   6  * Copyright (c) 1993, 1994, 1995, 1996
   7  *      Keith Bostic.  All rights reserved.
   8  *
   9  * See the LICENSE file for redistribution information.
  10  */
  11
  12 #include "config.h"
  13
  14 #ifndef lint
  15 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";
  16 #endif /* not lint */
  17
  18 #include <sys/types.h>
  19 #include <sys/queue.h>
  20 #include <sys/time.h>
  21
  22 #include <bitstring.h>
  23 #include <limits.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27
  28 #include "../common/common.h"
  29 #include "../vi/vi.h"
  30
  31 /*
  32  * ex_bg --     :bg
  33  *      Hide the screen.
  34  *
  35  * PUBLIC: int ex_bg __P((SCR *, EXCMD *));
  36  */
  37 int
  38 ex_bg(SCR *sp, 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(SCR *sp, EXCMD *cmdp)
  51 {
  52         SCR *nsp;
  53         int newscreen;
  54
  55         newscreen = F_ISSET(cmdp, E_NEWSCREEN);
  56         if (vs_fg(sp, &nsp, cmdp->argc ? cmdp->argv[0]->bp : NULL, newscreen))
  57                 return (1);
  58
  59         /* Set up the switch. */
  60         if (newscreen) {
  61                 sp->nextdisp = nsp;
  62                 F_SET(sp, SC_SSWITCH);
  63         }
  64         return (0);
  65 }
  66
  67 /*
  68  * ex_resize -- :resize [+-]rows
  69  *      Change the screen size.
  70  *
  71  * PUBLIC: int ex_resize __P((SCR *, EXCMD *));
  72  */
  73 int
  74 ex_resize(SCR *sp, EXCMD *cmdp)
  75 {
  76         adj_t adj;
  77
  78         switch (FL_ISSET(cmdp->iflags,
  79             E_C_COUNT | E_C_COUNT_NEG | E_C_COUNT_POS)) {
  80         case E_C_COUNT:
  81                 adj = A_SET;
  82                 break;
  83         case E_C_COUNT | E_C_COUNT_NEG:
  84                 adj = A_DECREASE;
  85                 break;
  86         case E_C_COUNT | E_C_COUNT_POS:
  87                 adj = A_INCREASE;
  88                 break;
  89         default:
  90                 ex_emsg(sp, cmdp->cmd->usage, EXM_USAGE);
  91                 return (1);
  92         }
  93         return (vs_resize(sp, cmdp->count, adj));
  94 }
  95
  96 /*
  97  * ex_sdisplay --
  98  *      Display the list of screens.
  99  *
 100  * PUBLIC: int ex_sdisplay __P((SCR *));
 101  */
 102 int
 103 ex_sdisplay(SCR *sp)
 104 {
 105         GS *gp;
 106         SCR *tsp;
 107         int cnt, sep;
 108         size_t col, len;
 109
 110         gp = sp->gp;
 111         if ((tsp = gp->hq.cqh_first) == (void *)&gp->hq) {
 112                 msgq(sp, M_INFO, "149|No background screens to display");
 113                 return (0);
 114         }
 115
 116         col = len = sep = 0;
 117         for (cnt = 1; tsp != (void *)&gp->hq && !INTERRUPTED(sp);
 118             tsp = tsp->q.cqe_next) {
 119                 col += len = strlen(tsp->frp->name) + sep;
 120                 if (col >= sp->cols - 1) {
 121                         col = len;
 122                         sep = 0;
 123                         (void)ex_puts(sp, "\n");
 124                 } else if (cnt != 1) {
 125                         sep = 1;
 126                         (void)ex_puts(sp, " ");
 127                 }
 128                 (void)ex_puts(sp, tsp->frp->name);
 129                 ++cnt;
 130         }
 131         if (!INTERRUPTED(sp))
 132                 (void)ex_puts(sp, "\n");
 133         return (0);
 134 }