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.
12 #include <sys/types.h>
13 #include <sys/queue.h>
16 #include <bitstring.h>
21 #include "../common/common.h"
26 * In historic vi, the section commands ignored empty lines, unlike the
27 * paragraph commands, which was probably okay. However, they also moved
28 * to the start of the last line when there where no more sections instead
29 * of the end of the last line like the paragraph commands. I've changed
30 * the latter behavior to match the paragraph commands.
32 * In historic vi, a section was defined as the first character(s) of the
33 * line matching, which could be followed by anything. This implementation
34 * follows that historic practice.
37 * The historic vi documentation (USD:15-10) claimed:
38 * The section commands interpret a preceding count as a different
39 * window size in which to redraw the screen at the new location,
40 * and this window size is the base size for newly drawn windows
41 * until another size is specified. This is very useful if you are
42 * on a slow terminal ...
44 * I can't get the 4BSD vi to do this, it just beeps at me. For now, a
45 * count to the section commands simply repeats the command.
49 * v_sectionf -- [count]]]
50 * Move forward count sections/functions.
53 * Using ]] as a motion command was a bit special, historically. It could
54 * match } as well as the usual { and section values. If it matched a { or
55 * a section, it did NOT include the matched line. If it matched a }, it
56 * did include the line. No clue why.
58 * PUBLIC: int v_sectionf(SCR *, VICMD *);
61 v_sectionf(SCR *sp, VICMD *vp)
68 /* Get the macro list. */
69 if ((list = O_STR(sp, O_SECTIONS)) == NULL)
74 * If the starting cursor position is at or before any non-blank
75 * characters in the line, i.e. the movement is cutting all of the
76 * line's text, the buffer is in line mode. It's a lot easier to
77 * check here, because we know that the end is going to be the start
81 if (vp->m_start.cno == 0)
84 vp->m_stop = vp->m_start;
86 if (nonblank(sp, vp->m_stop.lno, &vp->m_stop.cno))
88 if (vp->m_start.cno <= vp->m_stop.cno)
92 cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1;
93 for (lno = vp->m_start.lno; !db_get(sp, ++lno, 0, &p, &len);) {
96 if (p[0] == '{' || (ISMOTION(vp) && p[0] == '}')) {
106 * Historic documentation (USD:15-11, 4.2) said that formfeed
107 * characters (^L) in the first column delimited sections.
108 * The historic code mentions formfeed characters, but never
109 * implements them. Seems reasonable, do it.
111 if (p[0] == '\014') {
116 if (p[0] != '.' || len < 2)
118 for (lp = list; *lp != '\0'; lp += 2 * sizeof(*lp))
120 ((lp[1] == ' ' && len == 2) || lp[1] == p[2]) &&
124 * If not cutting this line, adjust to the end
125 * of the previous one. Otherwise, position to
128 adjust1: if (ISMOTION(vp))
131 adjust2: vp->m_stop.lno = lno;
137 /* If moving forward, reached EOF, check to see if we started there. */
138 if (vp->m_start.lno == lno - 1) {
143 ret1: if (db_get(sp, --lno, DBG_FATAL, NULL, &len))
145 vp->m_stop.lno = lno;
146 vp->m_stop.cno = len ? len - 1 : 0;
149 * Non-motion commands go to the end of the range. Delete and
150 * yank stay at the start of the range. Ignore others.
152 ret2: if (ISMOTION(vp)) {
153 vp->m_final = vp->m_start;
154 if (F_ISSET(vp, VM_LMODE))
157 vp->m_final = vp->m_stop;
162 * v_sectionb -- [count][[
163 * Move backward count sections/functions.
165 * PUBLIC: int v_sectionb(SCR *, VICMD *);
168 v_sectionb(SCR *sp, VICMD *vp)
175 /* An empty file or starting from line 1 is always illegal. */
176 if (vp->m_start.lno <= 1) {
181 /* Get the macro list. */
182 if ((list = O_STR(sp, O_SECTIONS)) == NULL)
185 cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1;
186 for (lno = vp->m_start.lno; !db_get(sp, --lno, 0, &p, &len);) {
196 * Historic documentation (USD:15-11, 4.2) said that formfeed
197 * characters (^L) in the first column delimited sections.
198 * The historic code mentions formfeed characters, but never
199 * implements them. Seems reasonable, do it.
201 if (p[0] == '\014') {
206 if (p[0] != '.' || len < 2)
208 for (lp = list; *lp != '\0'; lp += 2 * sizeof(*lp))
210 ((lp[1] == ' ' && len == 2) || lp[1] == p[2]) &&
212 adjust1: vp->m_stop.lno = lno;
219 * If moving backward, reached SOF, which is a movement sink.
220 * We already checked for starting there.
226 * All commands move to the end of the range.
229 * Historic practice is the section cut was in line mode if it started
230 * from column 0 and was in the backward direction. Otherwise, left
231 * motion commands adjust the starting point to the character before
232 * the current one. What makes this worse is that if it cut to line
233 * mode it also went to the first non-<blank>.
235 ret1: if (vp->m_start.cno == 0) {
236 F_CLR(vp, VM_RCM_MASK);
237 F_SET(vp, VM_RCM_SETFNB);
244 vp->m_final = vp->m_stop;