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_section.c,v 10.9 2000/06/27 17:19:08 skimo Exp $ (Berkeley) $Date: 2000/06/27 17:19:08 $";
16 #include <sys/types.h>
17 #include <sys/queue.h>
20 #include <bitstring.h>
25 #include "../common/common.h"
30 * In historic vi, the section commands ignored empty lines, unlike the
31 * paragraph commands, which was probably okay. However, they also moved
32 * to the start of the last line when there where no more sections instead
33 * of the end of the last line like the paragraph commands. I've changed
34 * the latter behavior to match the paragraph commands.
36 * In historic vi, a section was defined as the first character(s) of the
37 * line matching, which could be followed by anything. This implementation
38 * follows that historic practice.
41 * The historic vi documentation (USD:15-10) claimed:
42 * The section commands interpret a preceding count as a different
43 * window size in which to redraw the screen at the new location,
44 * and this window size is the base size for newly drawn windows
45 * until another size is specified. This is very useful if you are
46 * on a slow terminal ...
48 * I can't get the 4BSD vi to do this, it just beeps at me. For now, a
49 * count to the section commands simply repeats the command.
53 * v_sectionf -- [count]]]
54 * Move forward count sections/functions.
57 * Using ]] as a motion command was a bit special, historically. It could
58 * match } as well as the usual { and section values. If it matched a { or
59 * a section, it did NOT include the matched line. If it matched a }, it
60 * did include the line. No clue why.
62 * PUBLIC: int v_sectionf __P((SCR *, VICMD *));
74 /* Get the macro list. */
75 if ((list
= O_STR(sp
, O_SECTIONS
)) == NULL
)
80 * If the starting cursor position is at or before any non-blank
81 * characters in the line, i.e. the movement is cutting all of the
82 * line's text, the buffer is in line mode. It's a lot easier to
83 * check here, because we know that the end is going to be the start
87 if (vp
->m_start
.cno
== 0)
90 vp
->m_stop
= vp
->m_start
;
92 if (nonblank(sp
, vp
->m_stop
.lno
, &vp
->m_stop
.cno
))
94 if (vp
->m_start
.cno
<= vp
->m_stop
.cno
)
98 cnt
= F_ISSET(vp
, VC_C1SET
) ? vp
->count
: 1;
99 for (lno
= vp
->m_start
.lno
; !db_get(sp
, ++lno
, 0, &p
, &len
);) {
102 if (p
[0] == '{' || ISMOTION(vp
) && p
[0] == '}') {
112 * Historic documentation (USD:15-11, 4.2) said that formfeed
113 * characters (^L) in the first column delimited sections.
114 * The historic code mentions formfeed characters, but never
115 * implements them. Seems reasonable, do it.
117 if (p
[0] == '\014') {
122 if (p
[0] != '.' || len
< 2)
124 for (lp
= list
; *lp
!= '\0'; lp
+= 2 * sizeof(*lp
))
126 (lp
[1] == ' ' && len
== 2 || lp
[1] == p
[2]) &&
130 * If not cutting this line, adjust to the end
131 * of the previous one. Otherwise, position to
134 adjust1
: if (ISMOTION(vp
))
137 adjust2
: vp
->m_stop
.lno
= lno
;
143 /* If moving forward, reached EOF, check to see if we started there. */
144 if (vp
->m_start
.lno
== lno
- 1) {
149 ret1
: if (db_get(sp
, --lno
, DBG_FATAL
, NULL
, &len
))
151 vp
->m_stop
.lno
= lno
;
152 vp
->m_stop
.cno
= len
? len
- 1 : 0;
155 * Non-motion commands go to the end of the range. Delete and
156 * yank stay at the start of the range. Ignore others.
158 ret2
: if (ISMOTION(vp
)) {
159 vp
->m_final
= vp
->m_start
;
160 if (F_ISSET(vp
, VM_LMODE
))
163 vp
->m_final
= vp
->m_stop
;
168 * v_sectionb -- [count][[
169 * Move backward count sections/functions.
171 * PUBLIC: int v_sectionb __P((SCR *, VICMD *));
183 /* An empty file or starting from line 1 is always illegal. */
184 if (vp
->m_start
.lno
<= 1) {
189 /* Get the macro list. */
190 if ((list
= O_STR(sp
, O_SECTIONS
)) == NULL
)
193 cnt
= F_ISSET(vp
, VC_C1SET
) ? vp
->count
: 1;
194 for (lno
= vp
->m_start
.lno
; !db_get(sp
, --lno
, 0, &p
, &len
);) {
204 * Historic documentation (USD:15-11, 4.2) said that formfeed
205 * characters (^L) in the first column delimited sections.
206 * The historic code mentions formfeed characters, but never
207 * implements them. Seems reasonable, do it.
209 if (p
[0] == '\014') {
214 if (p
[0] != '.' || len
< 2)
216 for (lp
= list
; *lp
!= '\0'; lp
+= 2 * sizeof(*lp
))
218 (lp
[1] == ' ' && len
== 2 || lp
[1] == p
[2]) &&
220 adjust1
: vp
->m_stop
.lno
= lno
;
227 * If moving backward, reached SOF, which is a movement sink.
228 * We already checked for starting there.
234 * All commands move to the end of the range.
237 * Historic practice is the section cut was in line mode if it started
238 * from column 0 and was in the backward direction. Otherwise, left
239 * motion commands adjust the starting point to the character before
240 * the current one. What makes this worse is that if it cut to line
241 * mode it also went to the first non-<blank>.
243 ret1
: if (vp
->m_start
.cno
== 0) {
244 F_CLR(vp
, VM_RCM_MASK
);
245 F_SET(vp
, VM_RCM_SETFNB
);
252 vp
->m_final
= vp
->m_stop
;