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.
7 * See the LICENSE file for redistribution information.
13 static const char sccsid
[] = "$Id: v_left.c,v 10.9 2001/06/25 15:19:32 skimo Exp $ (Berkeley) $Date: 2001/06/25 15:19:32 $";
16 #include <sys/types.h>
17 #include <sys/queue.h>
20 #include <bitstring.h>
24 #include "../common/common.h"
28 * v_left -- [count]^H, [count]h
29 * Move left by columns.
31 * PUBLIC: int v_left __P((SCR *, VICMD *));
34 v_left(SCR
*sp
, VICMD
*vp
)
40 * The ^H and h commands always failed in the first column.
42 if (vp
->m_start
.cno
== 0) {
47 /* Find the end of the range. */
48 cnt
= F_ISSET(vp
, VC_C1SET
) ? vp
->count
: 1;
49 if (vp
->m_start
.cno
> cnt
)
50 vp
->m_stop
.cno
= vp
->m_start
.cno
- cnt
;
55 * All commands move to the end of the range. Motion commands
56 * adjust the starting point to the character before the current
61 vp
->m_final
= vp
->m_stop
;
66 * v_cfirst -- [count]_
67 * Move to the first non-blank character in a line.
69 * PUBLIC: int v_cfirst __P((SCR *, VICMD *));
72 v_cfirst(SCR
*sp
, VICMD
*vp
)
78 * If the _ is a motion component, it makes the command a line motion
79 * e.g. "d_" deletes the line. It also means that the cursor doesn't
82 * The _ command never failed in the first column.
88 * Historically a specified count makes _ move down count - 1
89 * rows, so, "3_" is the same as "2j_".
91 cnt
= F_ISSET(vp
, VC_C1SET
) ? vp
->count
: 1;
94 return (v_down(sp
, vp
));
98 * Move to the first non-blank.
100 * Can't just use RCM_SET_FNB, in case _ is used as the motion
101 * component of another command.
104 if (nonblank(sp
, vp
->m_stop
.lno
, &vp
->m_stop
.cno
))
109 * The _ command has to fail if the file is empty and we're doing
110 * a delete. If deleting line 1, and 0 is the first nonblank,
113 if (vp
->m_stop
.lno
== 1 &&
114 vp
->m_stop
.cno
== 0 && ISCMD(vp
->rkp
, 'd')) {
115 if (db_last(sp
, &lno
))
124 * Delete and non-motion commands move to the end of the range,
125 * yank stays at the start. Ignore others.
128 ISMOTION(vp
) && ISCMD(vp
->rkp
, 'y') ? vp
->m_start
: vp
->m_stop
;
134 * Move to the first non-blank character in this line.
136 * PUBLIC: int v_first __P((SCR *, VICMD *));
139 v_first(SCR
*sp
, VICMD
*vp
)
143 * Yielding to none in our quest for compatibility with every
144 * historical blemish of vi, no matter how strange it might be,
145 * we permit the user to enter a count and then ignore it.
149 * Move to the first non-blank.
151 * Can't just use RCM_SET_FNB, in case ^ is used as the motion
152 * component of another command.
155 if (nonblank(sp
, vp
->m_stop
.lno
, &vp
->m_stop
.cno
))
160 * The ^ command succeeded if used as a command when the cursor was
161 * on the first non-blank in the line, but failed if used as a motion
162 * component in the same situation.
164 if (ISMOTION(vp
) && vp
->m_start
.cno
== vp
->m_stop
.cno
) {
170 * If moving right, non-motion commands move to the end of the range.
171 * Delete and yank stay at the start. Motion commands adjust the
172 * ending point to the character before the current ending charcter.
174 * If moving left, all commands move to the end of the range. Motion
175 * commands adjust the starting point to the character before the
176 * current starting character.
178 if (vp
->m_start
.cno
< vp
->m_stop
.cno
)
181 vp
->m_final
= vp
->m_start
;
183 vp
->m_final
= vp
->m_stop
;
187 vp
->m_final
= vp
->m_stop
;
194 * Move to column count or the first column on this line. If the
195 * requested column is past EOL, move to EOL. The nasty part is
196 * that we have to know character column widths to make this work.
198 * PUBLIC: int v_ncol __P((SCR *, VICMD *));
201 v_ncol(SCR
*sp
, VICMD
*vp
)
203 if (F_ISSET(vp
, VC_C1SET
) && vp
->count
> 1) {
206 vs_colpos(sp
, vp
->m_start
.lno
, (size_t)vp
->count
);
209 * The | command succeeded if used as a command and the cursor
210 * didn't move, but failed if used as a motion component in the
213 if (ISMOTION(vp
) && vp
->m_stop
.cno
== vp
->m_start
.cno
) {
220 * The | command succeeded if used as a command in column 0
221 * without a count, but failed if used as a motion component
222 * in the same situation.
224 if (ISMOTION(vp
) && vp
->m_start
.cno
== 0) {
232 * If moving right, non-motion commands move to the end of the range.
233 * Delete and yank stay at the start. Motion commands adjust the
234 * ending point to the character before the current ending charcter.
236 * If moving left, all commands move to the end of the range. Motion
237 * commands adjust the starting point to the character before the
238 * current starting character.
240 if (vp
->m_start
.cno
< vp
->m_stop
.cno
)
243 vp
->m_final
= vp
->m_start
;
245 vp
->m_final
= vp
->m_stop
;
249 vp
->m_final
= vp
->m_stop
;
256 * Move to the first column on this line.
258 * PUBLIC: int v_zero __P((SCR *, VICMD *));
261 v_zero(SCR
*sp
, VICMD
*vp
)
265 * The 0 command succeeded if used as a command in the first column
266 * but failed if used as a motion component in the same situation.
268 if (ISMOTION(vp
) && vp
->m_start
.cno
== 0) {
274 * All commands move to the end of the range. Motion commands
275 * adjust the starting point to the character before the current
281 vp
->m_final
= vp
->m_stop
;