v_yank.c revision 19304 
1/*-
2 * Copyright (c) 1992, 1993, 1994
3 *	The Regents of the University of California.  All rights reserved.
4 * Copyright (c) 1992, 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
13static const char sccsid[] = "@(#)v_yank.c	10.9 (Berkeley) 5/19/96";
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
24#include "../common/common.h"
25#include "vi.h"
26
27/*
28 * v_yank -- [buffer][count]y[count][motion]
29 *	     [buffer][count]Y
30 *	Yank text (or lines of text) into a cut buffer.
31 *
32 * !!!
33 * Historic vi moved the cursor to the from MARK if it was before the current
34 * cursor and on a different line, e.g., "yk" moves the cursor but "yj" and
35 * "yl" do not.  Unfortunately, it's too late to change this now.  Matching
36 * the historic semantics isn't easy.  The line number was always changed and
37 * column movement was usually relative.  However, "y'a" moved the cursor to
38 * the first non-blank of the line marked by a, while "y`a" moved the cursor
39 * to the line and column marked by a.  Hopefully, the motion component code
40 * got it right...   Unlike delete, we make no adjustments here.
41 *
42 * PUBLIC: int v_yank __P((SCR *, VICMD *));
43 */
44int
45v_yank(sp, vp)
46	SCR *sp;
47	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}
83