ex/ex_visual.c

   1 /*-
   2  * Copyright (c) 1992, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * %sccs.include.redist.c%
   6  */
   7
   8 #ifndef lint
   9 static char sccsid[] = "$Id: ex_visual.c,v 8.7 1993/11/29 20:01:54 bostic Exp $ (Berkeley) $Date: 1993/11/29 20:01:54 $";
  10 #endif /* not lint */
  11
  12 #include <sys/types.h>
  13
  14 #include <stdlib.h>
  15 #include <string.h>
  16
  17 #include "vi.h"
  18 #include "excmd.h"
  19
  20 /*
  21  * ex_visual -- :[line] vi[sual] [^-.+] [window_size] [flags]
  22  *
  23  *      Switch to visual mode.
  24  */
  25 int
  26 ex_visual(sp, ep, cmdp)
  27         SCR *sp;
  28         EXF *ep;
  29         EXCMDARG *cmdp;
  30 {
  31         size_t len;
  32         int pos;
  33         char buf[256];
  34
  35         /* If open option off, disallow visual command. */
  36         if (!O_ISSET(sp, O_OPEN)) {
  37                 msgq(sp, M_ERR,
  38                     "The visual command requires that the open option be set.");
  39                 return (1);
  40         }
  41
  42         /* If a line specified, move to that line. */
  43         if (cmdp->addrcnt)
  44                 sp->lno = cmdp->addr1.lno;
  45
  46         /*
  47          * Push a command based on the line position flags.  If no
  48          * flag specified, the line goes at the top of the screen.
  49          */
  50         switch (F_ISSET(cmdp, E_F_CARAT | E_F_DASH | E_F_DOT | E_F_PLUS)) {
  51         case E_F_CARAT:
  52                 pos = '^';
  53                 break;
  54         case E_F_DASH:
  55                 pos = '-';
  56                 break;
  57         case E_F_DOT:
  58                 pos = '.';
  59                 break;
  60         case E_F_PLUS:
  61         default:
  62                 pos = '+';
  63                 break;
  64         }
  65
  66         if (F_ISSET(cmdp, E_COUNT))
  67                 len = snprintf(buf, sizeof(buf),
  68                      "%luz%c%lu", sp->lno, pos, cmdp->count);
  69         else
  70                 len = snprintf(buf, sizeof(buf), "%luz%c", sp->lno, pos);
  71         (void)term_push(sp, buf, len, 0, CH_NOMAP | CH_QUOTED);
  72
  73         /*
  74          * !!!
  75          * Historically, if no line address was specified, the [p#l] flags
  76          * caused the cursor to be moved to the last line of the file, which
  77          * was then positioned as described above.  This seems useless, so
  78          * I haven't implemented it.
  79          */
  80         switch (F_ISSET(cmdp, E_F_HASH | E_F_LIST | E_F_PRINT)) {
  81         case E_F_HASH:
  82                 O_SET(sp, O_NUMBER);
  83                 break;
  84         case E_F_LIST:
  85                 O_SET(sp, O_LIST);
  86                 break;
  87         case E_F_PRINT:
  88                 break;
  89         }
  90
  91         /* Switch modes. */
  92         F_CLR(sp, S_SCREENS);
  93         F_SET(sp, sp->saved_vi_mode);
  94
  95         return (0);
  96 }