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>
23 #include "../common/common.h"
26 #define INTEXT_CHECK { \
27 if (len == 0 || v_isempty(p, len)) { \
34 * Historic documentation (USD:15-11, 4.2) said that formfeed \
35 * characters (^L) in the first column delimited paragraphs. \
36 * The historic vi code mentions formfeed characters, but never \
37 * implements them. It seems reasonable, do it. \
39 if (p[0] == '\014') { \
44 if (p[0] != '.' || len < 2) \
46 for (lp = VIP(sp)->ps; *lp != '\0'; lp += 2) \
47 if (lp[0] == p[1] && \
48 (lp[1] == ' ' && len == 2 || lp[1] == p[2]) && \
54 * v_paragraphf -- [count]}
55 * Move forward count paragraphs.
57 * Paragraphs are empty lines after text, formfeed characters, or values
58 * from the paragraph or section options.
60 * PUBLIC: int v_paragraphf(SCR *, VICMD *);
63 v_paragraphf(SCR *sp, VICMD *vp)
65 enum { P_INTEXT, P_INBLANK } pstate;
67 recno_t cnt, lastlno, lno;
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
80 * This was historical practice in vi, with a single exception. If
81 * the paragraph movement was from the start of the last line to EOF,
82 * then all the characters were deleted from the last line, but the
83 * line itself remained. If somebody complains, don't pause, don't
84 * hesitate, just hit them.
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 /* Figure out what state we're currently in. */
99 lno = vp->m_start.lno;
100 if (db_get(sp, lno, 0, &p, &len))
104 * If we start in text, we want to switch states
105 * (2 * N - 1) times, in non-text, (2 * N) times.
107 cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1;
109 if (len == 0 || v_isempty(p, len))
119 if (db_get(sp, ++lno, 0, &p, &len))
126 if (len == 0 || v_isempty(p, len))
134 * Non-motion commands move to the end of the range,
135 * delete and yank stay at the start. Ignore others.
136 * Adjust the end of the range for motion commands;
137 * historically, a motion component was to the end of
138 * the previous line, whereas the movement command was
139 * to the start of the new "paragraph".
141 found: if (ISMOTION(vp)) {
142 vp->m_stop.lno = lastlno;
143 vp->m_stop.cno = lastlen ? lastlen - 1 : 0;
144 vp->m_final = vp->m_start;
146 vp->m_stop.lno = lno;
148 vp->m_final = vp->m_stop;
158 * Adjust end of the range for motion commands; EOF is a movement
159 * sink. The } command historically moved to the end of the last
160 * line, not the beginning, from any position before the end of the
161 * last line. It also historically worked on empty files, so we
162 * have to make it okay.
164 eof: if (vp->m_start.lno == lno || vp->m_start.lno == lno - 1) {
165 if (db_eget(sp, vp->m_start.lno, &p, &len, &isempty)) {
171 if (vp->m_start.cno == (len ? len - 1 : 0)) {
178 * Non-motion commands move to the end of the range, delete
179 * and yank stay at the start. Ignore others.
181 * If deleting the line (which happens if deleting to EOF), then
182 * cursor movement is to the first nonblank.
184 if (ISMOTION(vp) && ISCMD(vp->rkp, 'd')) {
185 F_CLR(vp, VM_RCM_MASK);
186 F_SET(vp, VM_RCM_SETFNB);
188 vp->m_stop.lno = lno - 1;
189 vp->m_stop.cno = len ? len - 1 : 0;
190 vp->m_final = ISMOTION(vp) ? vp->m_start : vp->m_stop;
195 * v_paragraphb -- [count]{
196 * Move backward count paragraphs.
198 * PUBLIC: int v_paragraphb(SCR *, VICMD *);
201 v_paragraphb(SCR *sp, VICMD *vp)
203 enum { P_INTEXT, P_INBLANK } pstate;
211 * Check for SOF. The historic vi didn't complain if users hit SOF
212 * repeatedly, unless it was part of a motion command. There is no
213 * question but that Emerson's editor of choice was vi.
215 * The { command historically moved to the beginning of the first
216 * line if invoked on the first line.
219 * If the starting cursor position is in the first column (backward
220 * paragraph movements did NOT historically pay attention to non-blank
221 * characters) i.e. the movement is cutting the entire line, the buffer
222 * is in line mode. Cuts from the beginning of the line also did not
223 * cut the current line, but started at the previous EOL.
225 * Correct for a left motion component while we're thinking about it.
227 lno = vp->m_start.lno;
230 if (vp->m_start.cno == 0) {
231 if (vp->m_start.lno == 1) {
232 v_sof(sp, &vp->m_start);
240 if (vp->m_start.lno <= 1)
243 /* Figure out what state we're currently in. */
244 if (db_get(sp, lno, 0, &p, &len))
248 * If we start in text, we want to switch states
249 * (2 * N - 1) times, in non-text, (2 * N) times.
251 cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1;
253 if (len == 0 || v_isempty(p, len))
261 * If the starting cursor is past the first column,
262 * the current line is checked for a paragraph.
264 if (vp->m_start.cno > 0)
269 if (db_get(sp, --lno, 0, &p, &len))
276 if (len != 0 && !v_isempty(p, len)) {
287 /* SOF is a movement sink. */
290 found: vp->m_stop.lno = lno;
294 * All commands move to the end of the range. (We already
295 * adjusted the start of the range for motion commands).
297 vp->m_final = vp->m_stop;
303 * Build the paragraph command search pattern.
305 * PUBLIC: int v_buildps(SCR *, char *, char *);
308 v_buildps(SCR *sp, char *p_p, char *s_p)
315 * The vi paragraph command searches for either a paragraph or
316 * section option macro.
318 p_len = p_p == NULL ? 0 : strlen(p_p);
319 s_len = s_p == NULL ? 0 : strlen(s_p);
321 if (p_len == 0 && s_len == 0)
324 MALLOC_RET(sp, p, p_len + s_len + 1);
330 memmove(p, p_p, p_len + 1);
332 memmove(p + p_len, s_p, s_len + 1);