dist/nvi/vi/v_yank.c

   1 /*      $NetBSD$ */
   2
   3 /*-
   4  * Copyright (c) 1992, 1993, 1994
   5  *      The Regents of the University of California.  All rights reserved.
   6  * Copyright (c) 1992, 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: v_yank.c,v 10.10 2001/06/25 15:19:36 skimo Exp (Berkeley) Date: 2001/06/25 15:19:36";
  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
  26 #include "../common/common.h"
  27 #include "vi.h"
  28
  29 /*
  30  * v_yank -- [buffer][count]y[count][motion]
  31  *           [buffer][count]Y
  32  *      Yank text (or lines of text) into a cut buffer.
  33  *
  34  * !!!
  35  * Historic vi moved the cursor to the from MARK if it was before the current
  36  * cursor and on a different line, e.g., "yk" moves the cursor but "yj" and
  37  * "yl" do not.  Unfortunately, it's too late to change this now.  Matching
  38  * the historic semantics isn't easy.  The line number was always changed and
  39  * column movement was usually relative.  However, "y'a" moved the cursor to
  40  * the first non-blank of the line marked by a, while "y`a" moved the cursor
  41  * to the line and column marked by a.  Hopefully, the motion component code
  42  * got it right...   Unlike delete, we make no adjustments here.
  43  *
  44  * PUBLIC: int v_yank __P((SCR *, VICMD *));
  45  */
  46 int
  47 v_yank(SCR *sp, VICMD *vp)
  48 {
  49         size_t len;
  50
  51         if (cut(sp,
  52             F_ISSET(vp, VC_BUFFER) ? &vp->buffer : NULL, &vp->m_start,
  53             &vp->m_stop, F_ISSET(vp, VM_LMODE) ? CUT_LINEMODE : 0))
  54                 return (1);
  55         sp->rptlines[L_YANKED] += (vp->m_stop.lno - vp->m_start.lno) + 1;
  56
  57         /*
  58          * One special correction, in case we've deleted the current line or
  59          * character.  We check it here instead of checking in every command
  60          * that can be a motion component.
  61          */
  62         if (db_get(sp, vp->m_final.lno, DBG_FATAL, NULL, &len))
  63                 return (1);
  64
  65         /*
  66          * !!!
  67          * Cursor movements, other than those caused by a line mode command
  68          * moving to another line, historically reset the relative position.
  69          *
  70          * This currently matches the check made in v_delete(), I'm hoping
  71          * that they should be consistent...
  72          */
  73         if (!F_ISSET(vp, VM_LMODE)) {
  74                 F_CLR(vp, VM_RCM_MASK);
  75                 F_SET(vp, VM_RCM_SET);
  76
  77                 /* Make sure the set cursor position exists. */
  78                 if (vp->m_final.cno >= len)
  79                         vp->m_final.cno = len ? len - 1 : 0;
  80         }
  81         return (0);
  82 }