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[] = "@(#)v_section.c 10.7 (Berkeley) 3/6/96";
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 *));
73 /* Get the macro list. */
74 if ((list = O_STR(sp, O_SECTIONS)) == NULL)
79 * If the starting cursor position is at or before any non-blank
80 * characters in the line, i.e. the movement is cutting all of the
81 * line's text, the buffer is in line mode. It's a lot easier to
82 * check here, because we know that the end is going to be the start
86 if (vp->m_start.cno == 0)
89 vp->m_stop = vp->m_start;
91 if (nonblank(sp, vp->m_stop.lno, &vp->m_stop.cno))
93 if (vp->m_start.cno <= vp->m_stop.cno)
97 cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1;
98 for (lno = vp->m_start.lno; !db_get(sp, ++lno, 0, &p, &len);) {
101 if (p[0] == '{' || ISMOTION(vp) && p[0] == '}') {
111 * Historic documentation (USD:15-11, 4.2) said that formfeed
112 * characters (^L) in the first column delimited sections.
113 * The historic code mentions formfeed characters, but never
114 * implements them. Seems reasonable, do it.
116 if (p[0] == '\014') {
121 if (p[0] != '.' || len < 2)
123 for (lp = list; *lp != '\0'; lp += 2 * sizeof(*lp))
125 (lp[1] == ' ' && len == 2 || lp[1] == p[2]) &&
129 * If not cutting this line, adjust to the end
130 * of the previous one. Otherwise, position to
133 adjust1: if (ISMOTION(vp))
136 adjust2: vp->m_stop.lno = lno;
142 /* If moving forward, reached EOF, check to see if we started there. */
143 if (vp->m_start.lno == lno - 1) {
148 ret1: if (db_get(sp, --lno, DBG_FATAL, NULL, &len))
150 vp->m_stop.lno = lno;
151 vp->m_stop.cno = len ? len - 1 : 0;
154 * Non-motion commands go to the end of the range. Delete and
155 * yank stay at the start of the range. Ignore others.
157 ret2: if (ISMOTION(vp)) {
158 vp->m_final = vp->m_start;
159 if (F_ISSET(vp, VM_LMODE))
162 vp->m_final = vp->m_stop;
167 * v_sectionb -- [count][[
168 * Move backward count sections/functions.
170 * PUBLIC: int v_sectionb __P((SCR *, VICMD *));
181 /* An empty file or starting from line 1 is always illegal. */
182 if (vp->m_start.lno <= 1) {
187 /* Get the macro list. */
188 if ((list = O_STR(sp, O_SECTIONS)) == NULL)
191 cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1;
192 for (lno = vp->m_start.lno; !db_get(sp, --lno, 0, &p, &len);) {
202 * Historic documentation (USD:15-11, 4.2) said that formfeed
203 * characters (^L) in the first column delimited sections.
204 * The historic code mentions formfeed characters, but never
205 * implements them. Seems reasonable, do it.
207 if (p[0] == '\014') {
212 if (p[0] != '.' || len < 2)
214 for (lp = list; *lp != '\0'; lp += 2 * sizeof(*lp))
216 (lp[1] == ' ' && len == 2 || lp[1] == p[2]) &&
218 adjust1: vp->m_stop.lno = lno;
225 * If moving backward, reached SOF, which is a movement sink.
226 * We already checked for starting there.
232 * All commands move to the end of the range.
235 * Historic practice is the section cut was in line mode if it started
236 * from column 0 and was in the backward direction. Otherwise, left
237 * motion commands adjust the starting point to the character before
238 * the current one. What makes this worse is that if it cut to line
239 * mode it also went to the first non-<blank>.
241 ret1: if (vp->m_start.cno == 0) {
242 F_CLR(vp, VM_RCM_MASK);
243 F_SET(vp, VM_RCM_SETFNB);
250 vp->m_final = vp->m_stop;