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#include <sys/types.h>
13#include <sys/queue.h>
14#include <sys/time.h>
15
16#include <bitstring.h>
17#include <limits.h>
18#include <stdio.h>
19
20#include "../common/common.h"
21#include "vi.h"
22
23/*
24 * v_delete -- [buffer][count]d[count]motion
25 *	       [buffer][count]D
26 *	Delete a range of text.
27 *
28 * PUBLIC: int v_delete(SCR *, VICMD *);
29 */
30int
31v_delete(SCR *sp, VICMD *vp)
32{
33	recno_t nlines;
34	size_t len;
35	int lmode;
36
37	lmode = F_ISSET(vp, VM_LMODE) ? CUT_LINEMODE : 0;
38
39	/* Yank the lines. */
40	if (cut(sp, F_ISSET(vp, VC_BUFFER) ? &vp->buffer : NULL,
41	    &vp->m_start, &vp->m_stop,
42	    lmode | (F_ISSET(vp, VM_CUTREQ) ? CUT_NUMREQ : CUT_NUMOPT)))
43		return (1);
44
45	/* Delete the lines. */
46	if (del(sp, &vp->m_start, &vp->m_stop, lmode))
47		return (1);
48
49	/*
50	 * Check for deletion of the entire file.  Try to check a close
51	 * by line so we don't go to the end of the file unnecessarily.
52	 */
53	if (!db_exist(sp, vp->m_final.lno + 1)) {
54		if (db_last(sp, &nlines))
55			return (1);
56		if (nlines == 0) {
57			vp->m_final.lno = 1;
58			vp->m_final.cno = 0;
59			return (0);
60		}
61	}
62
63	/*
64	 * One special correction, in case we've deleted the current line or
65	 * character.  We check it here instead of checking in every command
66	 * that can be a motion component.
67	 */
68	if (db_get(sp, vp->m_final.lno, 0, NULL, &len)) {
69		if (db_get(sp, nlines, DBG_FATAL, NULL, &len))
70			return (1);
71		vp->m_final.lno = nlines;
72	}
73
74	/*
75	 * !!!
76	 * Cursor movements, other than those caused by a line mode command
77	 * moving to another line, historically reset the relative position.
78	 *
79	 * This currently matches the check made in v_yank(), I'm hoping that
80	 * they should be consistent...
81	 */
82	if (!F_ISSET(vp, VM_LMODE)) {
83		F_CLR(vp, VM_RCM_MASK);
84		F_SET(vp, VM_RCM_SET);
85
86		/* Make sure the set cursor position exists. */
87		if (vp->m_final.cno >= len)
88			vp->m_final.cno = len ? len - 1 : 0;
89	}
90
91	/*
92	 * !!!
93	 * The "dd" command moved to the first non-blank; "d<motion>"
94	 * didn't.
95	 */
96	if (F_ISSET(vp, VM_LDOUBLE)) {
97		F_CLR(vp, VM_RCM_MASK);
98		F_SET(vp, VM_RCM_SETFNB);
99	}
100	return (0);
101}
102