1/*	$OpenBSD: v_yank.c,v 1.7 2014/11/12 04:28:41 bentley Exp $	*/
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#include <sys/types.h>
15#include <sys/queue.h>
16#include <sys/time.h>
17
18#include <bitstring.h>
19#include <limits.h>
20#include <stdio.h>
21
22#include "../common/common.h"
23#include "vi.h"
24
25/*
26 * v_yank -- [buffer][count]y[count][motion]
27 *	     [buffer][count]Y
28 *	Yank text (or lines of text) into a cut buffer.
29 *
30 * !!!
31 * Historic vi moved the cursor to the from MARK if it was before the current
32 * cursor and on a different line, e.g., "yk" moves the cursor but "yj" and
33 * "yl" do not.  Unfortunately, it's too late to change this now.  Matching
34 * the historic semantics isn't easy.  The line number was always changed and
35 * column movement was usually relative.  However, "y'a" moved the cursor to
36 * the first non-blank of the line marked by a, while "y`a" moved the cursor
37 * to the line and column marked by a.  Hopefully, the motion component code
38 * got it right...   Unlike delete, we make no adjustments here.
39 *
40 * PUBLIC: int v_yank(SCR *, VICMD *);
41 */
42int
43v_yank(SCR *sp, VICMD *vp)
44{
45	size_t len;
46
47	if (cut(sp,
48	    F_ISSET(vp, VC_BUFFER) ? &vp->buffer : NULL, &vp->m_start,
49	    &vp->m_stop, F_ISSET(vp, VM_LMODE) ? CUT_LINEMODE : 0))
50		return (1);
51	sp->rptlines[L_YANKED] += (vp->m_stop.lno - vp->m_start.lno) + 1;
52
53	/*
54	 * One special correction, in case we've deleted the current line or
55	 * character.  We check it here instead of checking in every command
56	 * that can be a motion component.
57	 */
58	if (db_get(sp, vp->m_final.lno, DBG_FATAL, NULL, &len))
59		return (1);
60
61	/*
62	 * !!!
63	 * Cursor movements, other than those caused by a line mode command
64	 * moving to another line, historically reset the relative position.
65	 *
66	 * This currently matches the check made in v_delete(), I'm hoping
67	 * that they should be consistent...
68	 */
69	if (!F_ISSET(vp, VM_LMODE)) {
70		F_CLR(vp, VM_RCM_MASK);
71		F_SET(vp, VM_RCM_SET);
72
73		/* Make sure the set cursor position exists. */
74		if (vp->m_final.cno >= len)
75			vp->m_final.cno = len ? len - 1 : 0;
76	}
77	return (0);
78}
79