2 * Copyright (c) 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_txt.c 10.87 (Berkeley) 10/13/96";
16 #include <sys/types.h>
17 #include <sys/queue.h>
21 #include <bitstring.h>
30 #include "../common/common.h"
33 static int txt_abbrev __P((SCR *, TEXT *, CHAR_T *, int, int *, int *));
34 static void txt_ai_resolve __P((SCR *, TEXT *, int *));
35 static TEXT *txt_backup __P((SCR *, TEXTH *, TEXT *, u_int32_t *));
36 static int txt_dent __P((SCR *, TEXT *, int));
37 static int txt_emark __P((SCR *, TEXT *, size_t));
38 static void txt_err __P((SCR *, TEXTH *));
39 static int txt_fc __P((SCR *, TEXT *, int *));
40 static int txt_fc_col __P((SCR *, int, ARGS **));
41 static int txt_hex __P((SCR *, TEXT *));
42 static int txt_insch __P((SCR *, TEXT *, CHAR_T *, u_int));
43 static int txt_isrch __P((SCR *, VICMD *, TEXT *, u_int8_t *));
44 static int txt_map_end __P((SCR *));
45 static int txt_map_init __P((SCR *));
46 static int txt_margin __P((SCR *, TEXT *, TEXT *, int *, u_int32_t));
47 static void txt_nomorech __P((SCR *));
48 static void txt_Rresolve __P((SCR *, TEXTH *, TEXT *, const size_t));
49 static int txt_resolve __P((SCR *, TEXTH *, u_int32_t));
50 static int txt_showmatch __P((SCR *, TEXT *));
51 static void txt_unmap __P((SCR *, TEXT *, u_int32_t *));
53 /* Cursor character (space is hard to track on the screen). */
54 #if defined(DEBUG) && 0
61 * Fill a buffer from the terminal for vi.
63 * PUBLIC: int v_tcmd __P((SCR *, VICMD *, ARG_CHAR_T, u_int));
66 v_tcmd(sp, vp, prompt, flags)
72 /* Normally, we end up where we started. */
73 vp->m_final.lno = sp->lno;
74 vp->m_final.cno = sp->cno;
76 /* Initialize the map. */
80 /* Move to the last line. */
81 sp->lno = TMAP[0].lno;
84 /* Don't update the modeline for now. */
85 F_SET(sp, SC_TINPUT_INFO);
87 /* Set the input flags. */
88 LF_SET(TXT_APPENDEOL |
89 TXT_CR | TXT_ESCAPE | TXT_INFOLINE | TXT_MAPINPUT);
90 if (O_ISSET(sp, O_ALTWERASE))
91 LF_SET(TXT_ALTWERASE);
92 if (O_ISSET(sp, O_TTYWERASE))
93 LF_SET(TXT_TTYWERASE);
95 /* Do the input thing. */
96 if (v_txt(sp, vp, NULL, NULL, 0, prompt, 0, 1, flags))
99 /* Reenable the modeline updates. */
100 F_CLR(sp, SC_TINPUT_INFO);
102 /* Clean up the map. */
107 F_SET(sp, SC_SCR_REDRAW); /* XXX */
109 /* Set the cursor to the resulting position. */
110 sp->lno = vp->m_final.lno;
111 sp->cno = vp->m_final.cno;
118 * Initialize the screen map for colon command-line input.
128 if (!IS_ONELINE(sp)) {
130 * Fake like the user is doing input on the last line of the
131 * screen. This makes all of the scrolling work correctly,
132 * and allows us the use of the vi text editing routines, not
133 * to mention practically infinite length ex commands.
135 * Save the current location.
137 vip->sv_tm_lno = TMAP->lno;
138 vip->sv_tm_soff = TMAP->soff;
139 vip->sv_tm_coff = TMAP->coff;
140 vip->sv_t_maxrows = sp->t_maxrows;
141 vip->sv_t_minrows = sp->t_minrows;
142 vip->sv_t_rows = sp->t_rows;
145 * If it's a small screen, TMAP may be small for the screen.
146 * Fix it, filling in fake lines as we go.
150 HMAP + (sp->t_maxrows - 1); TMAP < esmp; ++TMAP) {
151 TMAP[1].lno = TMAP[0].lno + 1;
152 TMAP[1].coff = HMAP->coff;
156 /* Build the fake entry. */
157 TMAP[1].lno = TMAP[0].lno + 1;
160 SMAP_FLUSH(&TMAP[1]);
163 /* Reset the screen information. */
164 sp->t_rows = sp->t_minrows = ++sp->t_maxrows;
171 * Reset the screen map for colon command-line input.
181 if (!IS_ONELINE(sp)) {
182 /* Restore the screen information. */
183 sp->t_rows = vip->sv_t_rows;
184 sp->t_minrows = vip->sv_t_minrows;
185 sp->t_maxrows = vip->sv_t_maxrows;
188 * If it's a small screen, TMAP may be wrong. Clear any
189 * lines that might have been overwritten.
192 for (cnt = sp->t_rows; cnt <= sp->t_maxrows; ++cnt) {
193 (void)sp->gp->scr_move(sp, cnt, 0);
194 (void)sp->gp->scr_clrtoeol(sp);
196 TMAP = HMAP + (sp->t_rows - 1);
201 * The map may be wrong if the user entered more than one
202 * (logical) line. Fix it. If the user entered a whole
203 * screen, this will be slow, but we probably don't care.
205 if (!O_ISSET(sp, O_LEFTRIGHT))
206 while (vip->sv_tm_lno != TMAP->lno ||
207 vip->sv_tm_soff != TMAP->soff)
213 * Invalidate the cursor and the line size cache, the line never
214 * really existed. This fixes bugs where the user searches for
215 * the last line on the screen + 1 and the refresh routine thinks
216 * that's where we just were.
219 F_SET(vip, VIP_CUR_INVALID);
225 * If doing input mapping on the colon command line, may need to unmap
226 * based on the command.
229 FL_ISSET(ec_flags, EC_MAPINPUT) && LF_ISSET(TXT_INFOLINE)
232 * Internally, we maintain tp->lno and tp->cno, externally, everyone uses
233 * sp->lno and sp->cno. Make them consistent as necessary.
235 #define UPDATE_POSITION(sp, tp) { \
236 (sp)->lno = (tp)->lno; \
237 (sp)->cno = (tp)->cno; \
244 * PUBLIC: int v_txt __P((SCR *, VICMD *, MARK *,
245 * PUBLIC: const char *, size_t, ARG_CHAR_T, recno_t, u_long, u_int32_t));
248 v_txt(sp, vp, tm, lp, len, prompt, ai_line, rcount, flags)
251 MARK *tm; /* To MARK. */
252 const char *lp; /* Input line. */
253 size_t len; /* Input line length. */
254 ARG_CHAR_T prompt; /* Prompt to display. */
255 recno_t ai_line; /* Line number to use for autoindent count. */
256 u_long rcount; /* Replay count. */
257 u_int32_t flags; /* TXT_* flags. */
259 EVENT ev, *evp; /* Current event. */
260 EVENT fc; /* File name completion event. */
262 TEXT *ntp, *tp; /* Input text structures. */
263 TEXT ait; /* Autoindent text structure. */
264 TEXT wmt; /* Wrapmargin text structure. */
267 abb_t abb; /* State of abbreviation checks. */
268 carat_t carat; /* State of the "[^0]^D" sequences. */
269 quote_t quote; /* State of quotation. */
270 size_t owrite, insert; /* Temporary copies of TEXT fields. */
271 size_t margin; /* Wrapmargin value. */
272 size_t rcol; /* 0-N: insert offset in the replay buffer. */
273 size_t tcol; /* Temporary column. */
274 u_int32_t ec_flags; /* Input mapping flags. */
275 #define IS_RESTART 0x01 /* Reset the incremental search. */
276 #define IS_RUNNING 0x02 /* Incremental search turned on. */
278 int abcnt, ab_turnoff; /* Abbreviation character count, switch. */
279 int filec_redraw; /* Redraw after the file completion routine. */
280 int hexcnt; /* Hex character count. */
281 int showmatch; /* Showmatch set on this character. */
282 int wm_set, wm_skip; /* Wrapmargin happened, blank skip flags. */
290 * Set the input flag, so tabs get displayed correctly
291 * and everyone knows that the text buffer is in use.
293 F_SET(sp, SC_TINPUT);
296 * Get one TEXT structure with some initial buffer space, reusing
297 * the last one if it's big enough. (All TEXT bookkeeping fields
298 * default to 0 -- text_init() handles this.) If changing a line,
299 * copy it into the TEXT buffer.
302 if (tiqh->cqh_first != (void *)tiqh) {
303 tp = tiqh->cqh_first;
304 if (tp->q.cqe_next != (void *)tiqh || tp->lb_len < len + 32) {
308 tp->ai = tp->insert = tp->offset = tp->owrite = 0;
311 memmove(tp->lb, lp, len);
315 newtp: if ((tp = text_init(sp, lp, len, len + 32)) == NULL)
317 CIRCLEQ_INSERT_HEAD(tiqh, tp, q);
320 /* Set default termination condition. */
323 /* Set the starting line, column. */
328 * Set the insert and overwrite counts. If overwriting characters,
329 * do insertion afterward. If not overwriting characters, assume
330 * doing insertion. If change is to a mark, emphasize it with an
331 * CH_ENDMARK character.
334 if (LF_ISSET(TXT_OVERWRITE)) {
335 tp->owrite = (tm->cno - tp->cno) + 1;
336 tp->insert = (len - tm->cno) - 1;
338 tp->insert = len - tp->cno;
340 if (LF_ISSET(TXT_EMARK) && txt_emark(sp, tp, tm->cno))
345 * Many of the special cases in text input are to handle autoindent
346 * support. Somebody decided that it would be a good idea if "^^D"
347 * and "0^D" deleted all of the autoindented characters. In an editor
348 * that takes single character input from the user, this beggars the
349 * imagination. Note also, "^^D" resets the next lines' autoindent,
352 * We assume that autoindent only happens on empty lines, so insert
353 * and overwrite will be zero. If doing autoindent, figure out how
354 * much indentation we need and fill it in. Update input column and
355 * screen cursor as necessary.
357 if (LF_ISSET(TXT_AUTOINDENT) && ai_line != OOBLNO) {
358 if (v_txt_auto(sp, ai_line, NULL, 0, tp))
363 * The cc and S commands have a special feature -- leading
364 * <blank> characters are handled as autoindent characters.
367 if (LF_ISSET(TXT_AICHARS)) {
371 tp->offset = tp->cno;
374 /* If getting a command buffer from the user, there may be a prompt. */
375 if (LF_ISSET(TXT_PROMPT)) {
376 tp->lb[tp->cno++] = prompt;
382 * If appending after the end-of-line, add a space into the buffer
383 * and move the cursor right. This space is inserted, i.e. pushed
384 * along, and then deleted when the line is resolved. Assumes that
385 * the cursor is already positioned at the end of the line. This
386 * avoids the nastiness of having the cursor reside on a magical
387 * column, i.e. a column that doesn't really exist. The only down
388 * side is that we may wrap lines or scroll the screen before it's
389 * strictly necessary. Not a big deal.
391 if (LF_ISSET(TXT_APPENDEOL)) {
392 tp->lb[tp->cno] = CH_CURSOR;
395 (void)vs_change(sp, tp->lno, LINE_RESET);
399 * Historic practice is that the wrapmargin value was a distance
400 * from the RIGHT-HAND margin, not the left. It's more useful to
401 * us as a distance from the left-hand margin, i.e. the same as
402 * the wraplen value. The wrapmargin option is historic practice.
403 * Nvi added the wraplen option so that it would be possible to
404 * edit files with consistent margins without knowing the number of
405 * columns in the window.
408 * Setting margin causes a significant performance hit. Normally
409 * we don't update the screen if there are keys waiting, but we
410 * have to if margin is set, otherwise the screen routines don't
411 * know where the cursor is.
414 * Abbreviated keys were affected by the wrapmargin option in the
415 * historic 4BSD vi. Mapped keys were usually, but sometimes not.
416 * See the comment in vi/v_text():set_txt_std for more information.
419 * One more special case. If an inserted <blank> character causes
420 * wrapmargin to split the line, the next user entered character is
421 * discarded if it's a <space> character.
423 wm_set = wm_skip = 0;
424 if (LF_ISSET(TXT_WRAPMARGIN))
425 if ((margin = O_VAL(sp, O_WRAPMARGIN)) != 0)
426 margin = sp->cols - margin;
428 margin = O_VAL(sp, O_WRAPLEN);
432 /* Initialize abbreviation checks. */
433 abcnt = ab_turnoff = 0;
434 abb = F_ISSET(gp, G_ABBREV) &&
435 LF_ISSET(TXT_MAPINPUT) ? AB_INWORD : AB_NOTSET;
438 * Set up the dot command. Dot commands are done by saving the actual
439 * characters and then reevaluating them so that things like wrapmargin
440 * can change between the insert and the replay.
443 * Historically, vi did not remap or reabbreviate replayed input. (It
444 * did beep at you if you changed an abbreviation and then replayed the
445 * input. We're not that compatible.) We don't have to do anything to
446 * avoid remapping, as we're not getting characters from the terminal
447 * routines. Turn the abbreviation check off.
450 * It would be nice if we could swallow backspaces and such, but it's
451 * not all that easy to do. What we can do is turn off the common
452 * error messages during the replay. Otherwise, when the user enters
453 * an illegal command, e.g., "Ia<erase><erase><erase><erase>b<escape>",
454 * and then does a '.', they get a list of error messages after command
458 if (LF_ISSET(TXT_REPLAY)) {
463 /* Other text input mode setup. */
467 LF_ISSET(TXT_SEARCHINCR) ? IS_RESTART | IS_RUNNING : 0);
468 filec_redraw = hexcnt = showmatch = 0;
470 /* Initialize input flags. */
471 ec_flags = LF_ISSET(TXT_MAPINPUT) ? EC_MAPINPUT : 0;
473 /* Refresh the screen. */
474 UPDATE_POSITION(sp, tp);
475 if (vs_refresh(sp, 1))
478 /* If it's dot, just do it now. */
479 if (F_ISSET(vp, VC_ISDOT))
484 next: if (v_event_get(sp, evp, 0, ec_flags))
488 * If file completion overwrote part of the screen and nothing else has
489 * been displayed, clean up. We don't do this as part of the normal
490 * message resolution because we know the user is on the colon command
491 * line and there's no reason to enter explicit characters to continue.
493 if (filec_redraw && !F_ISSET(sp, SC_SCR_EXWROTE)) {
496 fc.e_event = E_REPAINT;
497 fc.e_flno = vip->totalcount >=
498 sp->rows ? 1 : sp->rows - vip->totalcount;
499 fc.e_tlno = sp->rows;
500 vip->linecount = vip->lcontinue = vip->totalcount = 0;
501 (void)vs_repaint(sp, &fc);
502 (void)vs_refresh(sp, 1);
505 /* Deal with all non-character events. */
506 switch (evp->e_event) {
511 F_SET(sp, SC_EXIT_FORCE);
514 if (vs_repaint(sp, &ev))
518 /* <resize> interrupts the input mode. */
519 v_emsg(sp, NULL, VIM_WRESIZE);
522 if (evp->e_event != E_INTERRUPT && evp->e_event != E_WRESIZE)
523 v_event_err(sp, evp);
526 * Historically, <interrupt> exited the user from text input
527 * mode or cancelled a colon command, and returned to command
528 * mode. It also beeped the terminal, but that seems a bit
532 * If we are recording, morph into <escape> key so that
533 * we can repeat the command safely: there is no way to
534 * invalidate the repetition of an instance of a command,
535 * which would be the alternative possibility.
536 * If we are not recording (most likely on the command line),
537 * simply discard the input and return to command mode
538 * so that an INTERRUPT doesn't become for example a file
539 * completion request. -aymeric
541 if (LF_ISSET(TXT_RECORD)) {
542 evp->e_event = E_CHARACTER;
545 evp->e_value = K_ESCAPE;
555 * If the first character of the input is a nul, replay the previous
556 * input. (Historically, it's okay to replay non-existent input.)
557 * This was not documented as far as I know, and is a great test of vi
560 if (LF_ISSET(TXT_RECORD) && rcol == 0 && evp->e_c == '\0') {
561 if (vip->rep == NULL)
571 * File name completion and colon command-line editing. We don't
572 * have enough meta characters, so we expect people to overload
573 * them. If the two characters are the same, then we do file name
574 * completion if the cursor is past the first column, and do colon
575 * command-line editing if it's not.
577 if (quote == Q_NOTSET) {
578 int L__cedit, L__filec;
580 L__cedit = L__filec = 0;
581 if (LF_ISSET(TXT_CEDIT) && O_STR(sp, O_CEDIT) != NULL &&
582 O_STR(sp, O_CEDIT)[0] == evp->e_c)
584 if (LF_ISSET(TXT_FILEC) && O_STR(sp, O_FILEC) != NULL &&
585 O_STR(sp, O_FILEC)[0] == evp->e_c)
587 if (L__cedit == 1 && (L__filec == 0 || tp->cno == tp->offset)) {
588 tp->term = TERM_CEDIT;
592 if (txt_fc(sp, tp, &filec_redraw))
598 /* Abbreviation overflow check. See comment in txt_abbrev(). */
599 #define MAX_ABBREVIATION_EXPANSION 256
600 if (F_ISSET(&evp->e_ch, CH_ABBREVIATED)) {
601 if (++abcnt > MAX_ABBREVIATION_EXPANSION) {
602 if (v_event_flush(sp, CH_ABBREVIATED))
604 "191|Abbreviation exceeded expansion limit: characters discarded");
606 if (LF_ISSET(TXT_REPLAY))
613 /* Check to see if the character fits into the replay buffers. */
614 if (LF_ISSET(TXT_RECORD)) {
615 BINC_GOTO(sp, vip->rep,
616 vip->rep_len, (rcol + 1) * sizeof(EVENT));
617 vip->rep[rcol++] = *evp;
620 replay: if (LF_ISSET(TXT_REPLAY))
621 evp = vip->rep + rcol++;
623 /* Wrapmargin check for leading space. */
630 /* If quoted by someone else, simply insert the character. */
631 if (F_ISSET(&evp->e_ch, CH_QUOTED))
636 * If this character was quoted by a K_VLNEXT or a backslash, replace
637 * the placeholder (a carat or a backslash) with the new character.
638 * If it was quoted by a K_VLNEXT, we've already adjusted the cursor
639 * because it has to appear on top of the placeholder character. If
640 * it was quoted by a backslash, adjust the cursor now, the cursor
641 * doesn't appear on top of it. Historic practice in both cases.
643 * Skip tests for abbreviations; ":ab xa XA" followed by "ixa^V<space>"
644 * doesn't perform an abbreviation. Special case, ^V^J (not ^V^M) is
645 * the same as ^J, historically.
647 if (quote == Q_BTHIS || quote == Q_VTHIS) {
648 FL_CLR(ec_flags, EC_QUOTED);
649 if (LF_ISSET(TXT_MAPINPUT))
650 FL_SET(ec_flags, EC_MAPINPUT);
652 if (quote == Q_BTHIS &&
653 (evp->e_value == K_VERASE || evp->e_value == K_VKILL)) {
659 if (quote == Q_VTHIS && evp->e_value != K_NL) {
668 * Translate "<CH_HEX>[isxdigit()]*" to a character with a hex value:
669 * this test delimits the value by any non-hex character. Offset by
670 * one, we use 0 to mean that we've found <CH_HEX>.
672 if (hexcnt > 1 && !isxdigit(evp->e_c)) {
678 switch (evp->e_value) {
679 case K_CR: /* Carriage return. */
680 case K_NL: /* New line. */
681 /* Return in script windows and the command line. */
682 k_cr: if (LF_ISSET(TXT_CR)) {
684 * If this was a map, we may have not displayed
685 * the line. Display it, just in case.
687 * If a script window and not the colon line,
688 * push a <cr> so it gets executed.
690 if (LF_ISSET(TXT_INFOLINE)) {
691 if (vs_change(sp, tp->lno, LINE_RESET))
693 } else if (F_ISSET(sp, SC_SCRIPT))
694 (void)v_event_push(sp, NULL, "\r", 1, CH_NOMAP);
696 /* Set term condition: if empty. */
697 if (tp->cno <= tp->offset)
700 * Set term condition: if searching incrementally and
701 * the user entered a pattern, return a completed
702 * search, regardless if the entire pattern was found.
704 if (FL_ISSET(is_flags, IS_RUNNING) &&
705 tp->cno >= tp->offset + 1)
706 tp->term = TERM_SEARCH;
711 #define LINE_RESOLVE { \
713 * Handle abbreviations. If there was one, discard the \
714 * replay characters. \
716 if (abb == AB_INWORD && \
717 !LF_ISSET(TXT_REPLAY) && F_ISSET(gp, G_ABBREV)) { \
718 if (txt_abbrev(sp, tp, &evp->e_c, \
719 LF_ISSET(TXT_INFOLINE), &tmp, \
723 if (LF_ISSET(TXT_RECORD)) \
728 if (abb != AB_NOTSET) \
731 txt_unmap(sp, tp, &ec_flags); \
733 * Delete any appended cursor. It's possible to get in \
734 * situations where TXT_APPENDEOL is set but tp->insert \
735 * is 0 when using the R command and all the characters \
736 * are tp->owrite characters. \
738 if (LF_ISSET(TXT_APPENDEOL) && tp->insert > 0) { \
746 * Save the current line information for restoration in
747 * txt_backup(), and set the line final length.
749 tp->sv_len = tp->len;
750 tp->sv_cno = tp->cno;
753 /* Update the old line. */
754 if (vs_change(sp, tp->lno, LINE_RESET))
758 * Historic practice, when the autoindent edit option was set,
759 * was to delete <blank> characters following the inserted
760 * newline. This affected the 'R', 'c', and 's' commands; 'c'
761 * and 's' retained the insert characters only, 'R' moved the
762 * overwrite and insert characters into the next TEXT structure.
763 * We keep track of the number of characters erased for the 'R'
764 * command so that the final resolution of the line is correct.
769 if (LF_ISSET(TXT_REPLACE) && owrite != 0) {
770 for (p = tp->lb + tp->cno; owrite > 0 && isblank(*p);
771 ++p, --owrite, ++tp->R_erase);
773 for (; insert > 0 && isblank(*p);
774 ++p, ++tp->R_erase, --insert);
776 p = tp->lb + tp->cno + owrite;
777 if (O_ISSET(sp, O_AUTOINDENT))
779 isblank(*p); ++p, --insert);
785 * Create a new line and insert the new TEXT into the queue.
786 * DON'T insert until the old line has been updated, or the
787 * inserted line count in line.c:db_get() will be wrong.
789 if ((ntp = text_init(sp, p,
790 insert + owrite, insert + owrite + 32)) == NULL)
792 CIRCLEQ_INSERT_TAIL(&sp->tiq, ntp, q);
794 /* Set up bookkeeping for the new line. */
795 ntp->insert = insert;
796 ntp->owrite = owrite;
797 ntp->lno = tp->lno + 1;
800 * Reset the autoindent line value. 0^D keeps the autoindent
801 * line from changing, ^D changes the level, even if there were
802 * no characters in the old line. Note, if using the current
803 * tp structure, use the cursor as the length, the autoindent
804 * characters may have been erased.
806 if (LF_ISSET(TXT_AUTOINDENT)) {
807 if (carat == C_NOCHANGE) {
808 if (v_txt_auto(sp, OOBLNO, &ait, ait.ai, ntp))
810 FREE_SPACE(sp, ait.lb, ait.lb_len);
812 if (v_txt_auto(sp, OOBLNO, tp, tp->cno, ntp))
817 /* Reset the cursor. */
821 * If we're here because wrapmargin was set and we've broken a
822 * line, there may be additional information (i.e. the start of
823 * a line) in the wmt structure.
826 if (wmt.offset != 0 ||
827 wmt.owrite != 0 || wmt.insert != 0) {
828 #define WMTSPACE wmt.offset + wmt.owrite + wmt.insert
829 BINC_GOTO(sp, ntp->lb,
830 ntp->lb_len, ntp->len + WMTSPACE + 32);
831 memmove(ntp->lb + ntp->cno, wmt.lb, WMTSPACE);
832 ntp->len += WMTSPACE;
833 ntp->cno += wmt.offset;
834 ntp->owrite = wmt.owrite;
835 ntp->insert = wmt.insert;
840 /* New lines are TXT_APPENDEOL. */
841 if (ntp->owrite == 0 && ntp->insert == 0) {
842 BINC_GOTO(sp, ntp->lb, ntp->lb_len, ntp->len + 1);
843 LF_SET(TXT_APPENDEOL);
844 ntp->lb[ntp->cno] = CH_CURSOR;
849 /* Swap old and new TEXT's, and update the new line. */
851 if (vs_change(sp, tp->lno, LINE_INSERT))
855 case K_ESCAPE: /* Escape. */
856 if (!LF_ISSET(TXT_ESCAPE))
859 /* If we have a count, start replaying the input. */
869 * Some commands (e.g. 'o') need a <newline> for each
872 if (LF_ISSET(TXT_ADDNEWLINE))
876 * The R command turns into the 'a' command after the
879 if (LF_ISSET(TXT_REPLACE)) {
880 tp->insert = tp->owrite;
887 /* Set term condition: if empty. */
888 if (tp->cno <= tp->offset)
891 * Set term condition: if searching incrementally and the user
892 * entered a pattern, return a completed search, regardless if
893 * the entire pattern was found.
895 if (FL_ISSET(is_flags, IS_RUNNING) && tp->cno >= tp->offset + 1)
896 tp->term = TERM_SEARCH;
898 k_escape: LINE_RESOLVE;
901 * Clean up for the 'R' command, restoring overwrite
902 * characters, and making them into insert characters.
904 if (LF_ISSET(TXT_REPLACE))
905 txt_Rresolve(sp, &sp->tiq, tp, len);
908 * If there are any overwrite characters, copy down
909 * any insert characters, and decrement the length.
913 memmove(tp->lb + tp->cno,
914 tp->lb + tp->cno + tp->owrite, tp->insert);
915 tp->len -= tp->owrite;
919 * Optionally resolve the lines into the file. If not
920 * resolving the lines into the file, end the line with
921 * a nul. If the line is empty, then set the length to
922 * 0, the termination condition has already been set.
925 * This is wrong, should pass back a length.
927 if (LF_ISSET(TXT_RESOLVE)) {
928 if (txt_resolve(sp, &sp->tiq, flags))
931 BINC_GOTO(sp, tp->lb, tp->lb_len, tp->len + 1);
932 tp->lb[tp->len] = '\0';
936 * Set the return cursor position to rest on the last
937 * inserted character.
942 /* Update the last line. */
943 if (vs_change(sp, tp->lno, LINE_RESET))
946 case K_CARAT: /* Delete autoindent chars. */
947 if (tp->cno <= tp->ai && LF_ISSET(TXT_AUTOINDENT))
950 case K_ZERO: /* Delete autoindent chars. */
951 if (tp->cno <= tp->ai && LF_ISSET(TXT_AUTOINDENT))
954 case K_CNTRLD: /* Delete autoindent char. */
956 * If in the first column or no characters to erase, ignore
957 * the ^D (this matches historic practice). If not doing
958 * autoindent or already inserted non-ai characters, it's a
959 * literal. The latter test is done in the switch, as the
960 * CARAT forms are N + 1, not N.
962 if (!LF_ISSET(TXT_AUTOINDENT))
968 case C_CARATSET: /* ^^D */
969 if (tp->ai == 0 || tp->cno > tp->ai + tp->offset + 1)
972 /* Save the ai string for later. */
975 BINC_GOTO(sp, ait.lb, ait.lb_len, tp->ai);
976 memmove(ait.lb, tp->lb, tp->ai);
977 ait.ai = ait.len = tp->ai;
981 case C_ZEROSET: /* 0^D */
982 if (tp->ai == 0 || tp->cno > tp->ai + tp->offset + 1)
986 leftmargin: tp->lb[tp->cno - 1] = ' ';
987 tp->owrite += tp->cno - tp->offset;
989 tp->cno = tp->offset;
991 case C_NOTSET: /* ^D */
992 if (tp->ai == 0 || tp->cno > tp->ai + tp->offset)
995 (void)txt_dent(sp, tp, 0);
1001 case K_VERASE: /* Erase the last character. */
1002 /* If can erase over the prompt, return. */
1003 if (tp->cno <= tp->offset && LF_ISSET(TXT_BS)) {
1009 * If at the beginning of the line, try and drop back to a
1010 * previously inserted line.
1014 txt_backup(sp, &sp->tiq, tp, &flags)) == NULL)
1020 /* If nothing to erase, bell the user. */
1021 if (tp->cno <= tp->offset) {
1022 if (!LF_ISSET(TXT_REPLAY))
1027 /* Drop back one character. */
1031 * Historically, vi didn't replace the erased characters with
1032 * <blank>s, presumably because it's easier to fix a minor
1033 * typing mistake and continue on if the previous letters are
1034 * already there. This is a problem for incremental searching,
1035 * because the user can no longer tell where they are in the
1036 * colon command line because the cursor is at the last search
1037 * point in the screen. So, if incrementally searching, erase
1038 * the erased characters from the screen.
1040 if (FL_ISSET(is_flags, IS_RUNNING))
1041 tp->lb[tp->cno] = ' ';
1044 * Increment overwrite, decrement ai if deleted.
1047 * Historic vi did not permit users to use erase characters
1048 * to delete autoindent characters. We do. Eat hot death,
1052 if (tp->cno < tp->ai)
1055 /* Reset if we deleted an incremental search character. */
1056 if (FL_ISSET(is_flags, IS_RUNNING))
1057 FL_SET(is_flags, IS_RESTART);
1059 case K_VWERASE: /* Skip back one word. */
1061 * If at the beginning of the line, try and drop back to a
1062 * previously inserted line.
1066 txt_backup(sp, &sp->tiq, tp, &flags)) == NULL)
1072 * If at offset, nothing to erase so bell the user.
1074 if (tp->cno <= tp->offset) {
1075 if (!LF_ISSET(TXT_REPLAY))
1081 * The first werase goes back to any autoindent column and the
1082 * second werase goes back to the offset.
1085 * Historic vi did not permit users to use erase characters to
1086 * delete autoindent characters.
1088 if (tp->ai && tp->cno > tp->ai)
1095 /* Skip over trailing space characters. */
1096 while (tp->cno > max && isblank(tp->lb[tp->cno - 1])) {
1103 * There are three types of word erase found on UNIX systems.
1104 * They can be identified by how the string /a/b/c is treated
1105 * -- as 1, 3, or 6 words. Historic vi had two classes of
1106 * characters, and strings were delimited by them and
1107 * <blank>'s, so, 6 words. The historic tty interface used
1108 * <blank>'s to delimit strings, so, 1 word. The algorithm
1109 * offered in the 4.4BSD tty interface (as stty altwerase)
1110 * treats it as 3 words -- there are two classes of
1111 * characters, and strings are delimited by them and
1112 * <blank>'s. The difference is that the type of the first
1113 * erased character erased is ignored, which is exactly right
1114 * when erasing pathname components. The edit options
1115 * TXT_ALTWERASE and TXT_TTYWERASE specify the 4.4BSD tty
1116 * interface and the historic tty driver behavior,
1117 * respectively, and the default is the same as the historic
1120 * Overwrite erased characters if doing incremental search;
1121 * see comment above.
1123 if (LF_ISSET(TXT_TTYWERASE))
1124 while (tp->cno > max) {
1127 if (FL_ISSET(is_flags, IS_RUNNING))
1128 tp->lb[tp->cno] = ' ';
1129 if (isblank(tp->lb[tp->cno - 1]))
1133 if (LF_ISSET(TXT_ALTWERASE)) {
1136 if (FL_ISSET(is_flags, IS_RUNNING))
1137 tp->lb[tp->cno] = ' ';
1138 if (isblank(tp->lb[tp->cno - 1]))
1142 tmp = inword(tp->lb[tp->cno - 1]);
1143 while (tp->cno > max) {
1146 if (FL_ISSET(is_flags, IS_RUNNING))
1147 tp->lb[tp->cno] = ' ';
1148 if (tmp != inword(tp->lb[tp->cno - 1])
1149 || isblank(tp->lb[tp->cno - 1]))
1154 /* Reset if we deleted an incremental search character. */
1155 if (FL_ISSET(is_flags, IS_RUNNING))
1156 FL_SET(is_flags, IS_RESTART);
1158 case K_VKILL: /* Restart this line. */
1161 * If at the beginning of the line, try and drop back to a
1162 * previously inserted line. Historic vi did not permit
1163 * users to go back to previous lines.
1167 txt_backup(sp, &sp->tiq, tp, &flags)) == NULL)
1172 /* If at offset, nothing to erase so bell the user. */
1173 if (tp->cno <= tp->offset) {
1174 if (!LF_ISSET(TXT_REPLAY))
1180 * First kill goes back to any autoindent and second kill goes
1181 * back to the offset.
1184 * Historic vi did not permit users to use erase characters to
1185 * delete autoindent characters.
1187 if (tp->ai && tp->cno > tp->ai)
1193 tp->owrite += tp->cno - max;
1196 * Overwrite erased characters if doing incremental search;
1197 * see comment above.
1199 if (FL_ISSET(is_flags, IS_RUNNING))
1201 tp->lb[--tp->cno] = ' ';
1202 } while (tp->cno > max);
1206 /* Reset if we deleted an incremental search character. */
1207 if (FL_ISSET(is_flags, IS_RUNNING))
1208 FL_SET(is_flags, IS_RESTART);
1210 case K_CNTRLT: /* Add autoindent characters. */
1211 if (!LF_ISSET(TXT_CNTRLT))
1213 if (txt_dent(sp, tp, 1))
1218 if (LF_ISSET(TXT_SHOWMATCH))
1221 case K_BACKSLASH: /* Quote next erase/kill. */
1224 * Historic vi tried to make abbreviations after a backslash
1225 * escape work. If you did ":ab x y", and inserted "x\^H",
1226 * (assuming the erase character was ^H) you got "x^H", and
1227 * no abbreviation was done. If you inserted "x\z", however,
1228 * it tried to back up and do the abbreviation, i.e. replace
1229 * 'x' with 'y'. The problem was it got it wrong, and you
1230 * ended up with "zy\".
1232 * This is really hard to do (you have to remember the
1233 * word/non-word state, for example), and doesn't make any
1234 * sense to me. Both backslash and the characters it
1235 * (usually) escapes will individually trigger the
1236 * abbreviation, so I don't see why the combination of them
1237 * wouldn't. I don't expect to get caught on this one,
1238 * particularly since it never worked right, but I've been
1241 * Do the tests for abbreviations, so ":ab xa XA",
1242 * "ixa\<K_VERASE>" performs the abbreviation.
1246 case K_VLNEXT: /* Quote next character. */
1250 * Turn on the quote flag so that the underlying routines
1251 * quote the next character where it's possible. Turn off
1252 * the input mapbiting flag so that we don't remap the next
1255 FL_SET(ec_flags, EC_QUOTED);
1256 FL_CLR(ec_flags, EC_MAPINPUT);
1260 * Skip the tests for abbreviations, so ":ab xa XA",
1261 * "ixa^V<space>" doesn't perform the abbreviation.
1267 default: /* Insert the character. */
1269 * Historically, vi eliminated nul's out of hand. If the
1270 * beautify option was set, it also deleted any unknown
1271 * ASCII value less than space (040) and the del character
1272 * (0177), except for tabs. Unknown is a key word here.
1273 * Most vi documentation claims that it deleted everything
1274 * but <tab>, <nl> and <ff>, as that's what the original
1275 * 4BSD documentation said. This is obviously wrong,
1276 * however, as <esc> would be included in that list. What
1277 * we do is eliminate any unquoted, iscntrl() character that
1278 * wasn't a replay and wasn't handled specially, except
1281 if (LF_ISSET(TXT_BEAUTIFY) && iscntrl(evp->e_c) &&
1282 evp->e_value != K_FORMFEED && evp->e_value != K_TAB) {
1284 "192|Illegal character; quote to enter");
1285 if (LF_ISSET(TXT_REPLAY))
1291 * If entering a non-word character after a word, check for
1292 * abbreviations. If there was one, discard replay characters.
1293 * If entering a blank character, check for unmap commands,
1296 if (!inword(evp->e_c)) {
1297 if (abb == AB_INWORD &&
1298 !LF_ISSET(TXT_REPLAY) && F_ISSET(gp, G_ABBREV)) {
1299 if (txt_abbrev(sp, tp, &evp->e_c,
1300 LF_ISSET(TXT_INFOLINE), &tmp, &ab_turnoff))
1303 if (LF_ISSET(TXT_RECORD))
1308 if (isblank(evp->e_c) && UNMAP_TST)
1309 txt_unmap(sp, tp, &ec_flags);
1311 if (abb != AB_NOTSET)
1312 abb = inword(evp->e_c) ? AB_INWORD : AB_NOTWORD;
1314 insl_ch: if (txt_insch(sp, tp, &evp->e_c, flags))
1318 * If we're using K_VLNEXT to quote the next character, then
1319 * we want the cursor to position itself on the ^ placeholder
1320 * we're displaying, to match historic practice.
1322 if (quote == Q_VNEXT) {
1329 * Translate "<CH_HEX>[isxdigit()]*" to a character with
1330 * a hex value: this test delimits the value by the max
1331 * number of hex bytes. Offset by one, we use 0 to mean
1332 * that we've found <CH_HEX>.
1334 if (hexcnt != 0 && hexcnt++ == sizeof(CHAR_T) * 2 + 1) {
1336 if (txt_hex(sp, tp))
1341 * Check to see if we've crossed the margin.
1344 * In the historic vi, the wrapmargin value was figured out
1345 * using the display widths of the characters, i.e. <tab>
1346 * characters were counted as two characters if the list edit
1347 * option is set, but as the tabstop edit option number of
1348 * characters otherwise. That's what the vs_column() function
1349 * gives us, so we use it.
1352 if (vs_column(sp, &tcol))
1354 if (tcol >= margin) {
1355 if (txt_margin(sp, tp, &wmt, &tmp, flags))
1358 if (isblank(evp->e_c))
1367 * If we've reached the end of the buffer, then we need to
1368 * switch into insert mode. This happens when there's a
1369 * change to a mark and the user puts in more characters than
1370 * the length of the motion.
1372 ebuf_chk: if (tp->cno >= tp->len) {
1373 BINC_GOTO(sp, tp->lb, tp->lb_len, tp->len + 1);
1374 LF_SET(TXT_APPENDEOL);
1376 tp->lb[tp->cno] = CH_CURSOR;
1381 /* Step the quote state forward. */
1382 if (quote != Q_NOTSET) {
1383 if (quote == Q_BNEXT)
1385 if (quote == Q_VNEXT)
1392 if (tp->cno + tp->insert + tp->owrite != tp->len) {
1394 "len %u != cno: %u ai: %u insert %u overwrite %u",
1395 tp->len, tp->cno, tp->ai, tp->insert, tp->owrite);
1396 if (LF_ISSET(TXT_REPLAY))
1398 tp->len = tp->cno + tp->insert + tp->owrite;
1403 * 1: If we don't need to know where the cursor really is and we're
1404 * replaying text, keep going.
1406 if (margin == 0 && LF_ISSET(TXT_REPLAY))
1410 * 2: Reset the line. Don't bother unless we're about to wait on
1411 * a character or we need to know where the cursor really is.
1412 * We have to do this before showing matching characters so the
1413 * user can see what they're matching.
1415 if ((margin != 0 || !KEYS_WAITING(sp)) &&
1416 vs_change(sp, tp->lno, LINE_RESET))
1420 * 3: If there aren't keys waiting, display the matching character.
1421 * We have to do this before resolving any messages, otherwise
1422 * the error message from a missing match won't appear correctly.
1425 if (!KEYS_WAITING(sp) && txt_showmatch(sp, tp))
1431 * 4: If there have been messages and we're not editing on the colon
1432 * command line or doing file name completion, resolve them.
1434 if ((vip->totalcount != 0 || F_ISSET(gp, G_BELLSCHED)) &&
1435 !F_ISSET(sp, SC_TINPUT_INFO) && !filec_redraw &&
1436 vs_resolve(sp, NULL, 0))
1440 * 5: Refresh the screen if we're about to wait on a character or we
1441 * need to know where the cursor really is.
1443 if (margin != 0 || !KEYS_WAITING(sp)) {
1444 UPDATE_POSITION(sp, tp);
1445 if (vs_refresh(sp, margin != 0))
1449 /* 6: Proceed with the incremental search. */
1450 if (FL_ISSET(is_flags, IS_RUNNING) && txt_isrch(sp, vp, tp, &is_flags))
1453 /* 7: Next character... */
1454 if (LF_ISSET(TXT_REPLAY))
1458 done: /* Leave input mode. */
1459 F_CLR(sp, SC_TINPUT);
1461 /* If recording for playback, save it. */
1462 if (LF_ISSET(TXT_RECORD))
1463 vip->rep_cnt = rcol;
1466 * If not working on the colon command line, set the final cursor
1469 if (!F_ISSET(sp, SC_TINPUT_INFO)) {
1470 vp->m_final.lno = tp->lno;
1471 vp->m_final.cno = tp->cno;
1477 F_CLR(sp, SC_TINPUT);
1478 txt_err(sp, &sp->tiq);
1484 * Handle abbreviations.
1487 txt_abbrev(sp, tp, pushcp, isinfoline, didsubp, turnoffp)
1491 int isinfoline, *didsubp, *turnoffp;
1498 /* Check to make sure we're not at the start of an append. */
1500 if (tp->cno == tp->offset)
1506 * Find the start of the "word".
1509 * We match historic practice, which, as far as I can tell, had an
1510 * off-by-one error. The way this worked was that when the inserted
1511 * text switched from a "word" character to a non-word character,
1512 * vi would check for possible abbreviations. It would then take the
1513 * type (i.e. word/non-word) of the character entered TWO characters
1514 * ago, and move backward in the text until reaching a character that
1515 * was not that type, or the beginning of the insert, the line, or
1516 * the file. For example, in the string "abc<space>", when the <space>
1517 * character triggered the abbreviation check, the type of the 'b'
1518 * character was used for moving through the string. Maybe there's a
1519 * reason for not using the first (i.e. 'c') character, but I can't
1522 * Terminate at the beginning of the insert or the character after the
1523 * offset character -- both can be tested for using tp->offset.
1525 off = tp->cno - 1; /* Previous character. */
1527 len = 1; /* One character test. */
1528 if (off == tp->offset || isblank(p[-1]))
1530 if (inword(p[-1])) /* Move backward to change. */
1533 if (off == tp->offset || !inword(p[-1]))
1539 if (off == tp->offset ||
1540 inword(p[-1]) || isblank(p[-1]))
1546 * Historic vi exploded abbreviations on the command line. This has
1547 * obvious problems in that unabbreviating the string can be extremely
1548 * tricky, particularly if the string has, say, an embedded escape
1549 * character. Personally, I think it's a stunningly bad idea. Other
1550 * examples of problems this caused in historic vi are:
1553 * results in "bar" being abbreviated to "baz", which wasn't what the
1554 * user had in mind at all. Also, the commands:
1557 * resulted in an error message that "bar" wasn't mapped. Finally,
1558 * since the string was already exploded by the time the unabbreviate
1559 * command got it, all it knew was that an abbreviation had occurred.
1560 * Cleverly, it checked the replacement string for its unabbreviation
1561 * match, which meant that the commands:
1565 * unabbreviate "foo1", and the commands:
1568 * unabbreviate "foo"!
1570 * Anyway, people neglected to first ask my opinion before they wrote
1571 * macros that depend on this stuff, so, we make this work as follows.
1572 * When checking for an abbreviation on the command line, if we get a
1573 * string which is <blank> terminated and which starts at the beginning
1574 * of the line, we check to see it is the abbreviate or unabbreviate
1575 * commands. If it is, turn abbreviations off and return as if no
1576 * abbreviation was found. Note also, minor trickiness, so that if
1577 * the user erases the line and starts another command, we turn the
1578 * abbreviations back on.
1580 * This makes the layering look like a Nachos Supreme.
1582 search: if (isinfoline)
1583 if (off == tp->ai || off == tp->offset)
1584 if (ex_is_abbrev(p, len)) {
1593 /* Check for any abbreviations. */
1594 if ((qp = seq_find(sp, NULL, NULL, p, len, SEQ_ABBREV, NULL)) == NULL)
1598 * Push the abbreviation onto the tty stack. Historically, characters
1599 * resulting from an abbreviation expansion were themselves subject to
1600 * map expansions, O_SHOWMATCH matching etc. This means the expanded
1601 * characters will be re-tested for abbreviations. It's difficult to
1602 * know what historic practice in this case was, since abbreviations
1603 * were applied to :colon command lines, so entering abbreviations that
1604 * looped was tricky, although possible. In addition, obvious loops
1605 * didn't work as expected. (The command ':ab a b|ab b c|ab c a' will
1606 * silently only implement and/or display the last abbreviation.)
1608 * This implementation doesn't recover well from such abbreviations.
1609 * The main input loop counts abbreviated characters, and, when it
1610 * reaches a limit, discards any abbreviated characters on the queue.
1611 * It's difficult to back up to the original position, as the replay
1612 * queue would have to be adjusted, and the line state when an initial
1613 * abbreviated character was received would have to be saved.
1616 if (v_event_push(sp, NULL, &ch, 1, CH_ABBREVIATED))
1618 if (v_event_push(sp, NULL, qp->output, qp->olen, CH_ABBREVIATED))
1622 * If the size of the abbreviation is larger than or equal to the size
1623 * of the original text, move to the start of the replaced characters,
1624 * and add their length to the overwrite count.
1626 * If the abbreviation is smaller than the original text, we have to
1627 * delete the additional overwrite characters and copy down any insert
1631 if (qp->olen >= len)
1635 memmove(tp->lb + tp->cno + qp->olen,
1636 tp->lb + tp->cno + tp->owrite + len, tp->insert);
1637 tp->owrite += qp->olen;
1638 tp->len -= len - qp->olen;
1642 * We return the length of the abbreviated characters. This is so
1643 * the calling routine can replace the replay characters with the
1644 * abbreviation. This means that subsequent '.' commands will produce
1645 * the same text, regardless of intervening :[un]abbreviate commands.
1646 * This is historic practice.
1654 * Handle the unmap command.
1657 txt_unmap(sp, tp, ec_flagsp)
1660 u_int32_t *ec_flagsp;
1665 /* Find the beginning of this "word". */
1666 for (off = tp->cno - 1, p = tp->lb + off, len = 0;; --p, --off) {
1672 if (off == tp->ai || off == tp->offset)
1678 * Historic vi exploded input mappings on the command line. See the
1679 * txt_abbrev() routine for an explanation of the problems inherent
1682 * We make this work as follows. If we get a string which is <blank>
1683 * terminated and which starts at the beginning of the line, we check
1684 * to see it is the unmap command. If it is, we return that the input
1685 * mapping should be turned off. Note also, minor trickiness, so that
1686 * if the user erases the line and starts another command, we go ahead
1687 * an turn mapping back on.
1689 if ((off == tp->ai || off == tp->offset) && ex_is_unmap(p, len))
1690 FL_CLR(*ec_flagsp, EC_MAPINPUT);
1692 FL_SET(*ec_flagsp, EC_MAPINPUT);
1697 * When a line is resolved by <esc>, review autoindent characters.
1700 txt_ai_resolve(sp, tp, changedp)
1707 size_t cno, len, new, old, scno, spaces, tab_after_sp, tabs;
1713 * If the line is empty, has an offset, or no autoindent
1714 * characters, we're done.
1716 if (!tp->len || tp->offset || !tp->ai)
1720 * If the length is less than or equal to the autoindent
1721 * characters, delete them.
1723 if (tp->len <= tp->ai) {
1724 tp->ai = tp->cno = tp->len = 0;
1729 * The autoindent characters plus any leading <blank> characters
1730 * in the line are resolved into the minimum number of characters.
1731 * Historic practice.
1733 ts = O_VAL(sp, O_TABSTOP);
1735 /* Figure out the last <blank> screen column. */
1736 for (p = tp->lb, scno = 0, len = tp->len,
1737 spaces = tab_after_sp = 0; len-- && isblank(*p); ++p)
1741 scno += COL_OFF(scno, ts);
1748 * If there are no spaces, or no tabs after spaces and less than
1749 * ts spaces, it's already minimal.
1751 if (!spaces || !tab_after_sp && spaces < ts)
1754 /* Count up spaces/tabs needed to get to the target. */
1755 for (cno = 0, tabs = 0; cno + COL_OFF(cno, ts) <= scno; ++tabs)
1756 cno += COL_OFF(cno, ts);
1757 spaces = scno - cno;
1760 * Figure out how many characters we're dropping -- if we're not
1761 * dropping any, it's already minimal, we're done.
1764 new = spaces + tabs;
1768 /* Shift the rest of the characters down, adjust the counts. */
1770 memmove(p - del, p, tp->len - old);
1774 /* Fill in space/tab characters. */
1775 for (p = tp->lb; tabs--;)
1784 * Handle autoindent. If aitp isn't NULL, use it, otherwise,
1785 * retrieve the line.
1787 * PUBLIC: int v_txt_auto __P((SCR *, recno_t, TEXT *, size_t, TEXT *));
1790 v_txt_auto(sp, lno, aitp, len, tp)
1801 * If the ex append command is executed with an address of 0,
1802 * it's possible to get here with a line number of 0. Return
1809 if (db_get(sp, lno, DBG_FATAL, &t, &len))
1814 /* Count whitespace characters. */
1815 for (p = t; len > 0; ++p, --len)
1819 /* Set count, check for no indentation. */
1820 if ((nlen = (p - t)) == 0)
1823 /* Make sure the buffer's big enough. */
1824 BINC_RET(sp, tp->lb, tp->lb_len, tp->len + nlen);
1826 /* Copy the buffer's current contents up. */
1828 memmove(tp->lb + nlen, tp->lb, tp->len);
1831 /* Copy the indentation into the new buffer. */
1832 memmove(tp->lb, t, nlen);
1834 /* Set the autoindent count. */
1841 * Back up to the previously edited line.
1844 txt_backup(sp, tiqh, tp, flagsp)
1853 /* Get a handle on the previous TEXT structure. */
1854 if ((ntp = tp->q.cqe_prev) == (void *)tiqh) {
1855 if (!FL_ISSET(*flagsp, TXT_REPLAY))
1857 "193|Already at the beginning of the insert");
1862 ntp->len = ntp->sv_len;
1864 /* Handle appending to the line. */
1866 if (ntp->owrite == 0 && ntp->insert == 0) {
1867 ntp->lb[ntp->len] = CH_CURSOR;
1870 FL_SET(*flagsp, TXT_APPENDEOL);
1872 FL_CLR(*flagsp, TXT_APPENDEOL);
1874 /* Release the current TEXT. */
1875 CIRCLEQ_REMOVE(tiqh, tp, q);
1878 /* Update the old line on the screen. */
1879 if (vs_change(sp, ntp->lno + 1, LINE_DELETE))
1882 /* Return the new/current TEXT. */
1887 * Text indentation is truly strange. ^T and ^D do movements to the next or
1888 * previous shiftwidth value, i.e. for a 1-based numbering, with shiftwidth=3,
1889 * ^T moves a cursor on the 7th, 8th or 9th column to the 10th column, and ^D
1893 * The ^T and ^D characters in historical vi had special meaning only when they
1894 * were the first characters entered after entering text input mode. As normal
1895 * erase characters couldn't erase autoindent characters (^T in this case), it
1896 * meant that inserting text into previously existing text was strange -- ^T
1897 * only worked if it was the first keystroke(s), and then could only be erased
1898 * using ^D. This implementation treats ^T specially anywhere it occurs in the
1899 * input, and permits the standard erase characters to erase the characters it
1903 * A fun test is to try:
1905 * i<CR>^Tx<CR>^Tx<CR>^Tx<CR>^Dx<CR>^Dx<CR>^Dx<esc>
1906 * Historic vi loses some of the '$' marks on the line ends, but otherwise gets
1910 * Technically, txt_dent should be part of the screen interface, as it requires
1911 * knowledge of character sizes, including <space>s, on the screen. It's here
1912 * because it's a complicated little beast, and I didn't want to shove it down
1913 * into the screen. It's probable that KEY_LEN will call into the screen once
1914 * there are screens with different character representations.
1917 * Handle ^T indents, ^D outdents.
1919 * If anything changes here, check the ex version to see if it needs similar
1923 txt_dent(sp, tp, isindent)
1930 size_t cno, current, spaces, target, tabs, off;
1933 ts = O_VAL(sp, O_TABSTOP);
1934 sw = O_VAL(sp, O_SHIFTWIDTH);
1937 * Since we don't know what precedes the character(s) being inserted
1938 * (or deleted), the preceding whitespace characters must be resolved.
1939 * An example is a <tab>, which doesn't need a full shiftwidth number
1940 * of columns because it's preceded by <space>s. This is easy to get
1941 * if the user sets shiftwidth to a value less than tabstop (or worse,
1942 * something for which tabstop isn't a multiple) and then uses ^T to
1943 * indent, and ^D to outdent.
1945 * Figure out the current and target screen columns. In the historic
1946 * vi, the autoindent column was NOT determined using display widths
1947 * of characters as was the wrapmargin column. For that reason, we
1948 * can't use the vs_column() function, but have to calculate it here.
1949 * This is slow, but it's normally only on the first few characters of
1952 for (current = cno = 0; cno < tp->cno; ++cno)
1953 current += tp->lb[cno] == '\t' ?
1954 COL_OFF(current, ts) : KEY_LEN(sp, tp->lb[cno]);
1958 target += COL_OFF(target, sw);
1960 target -= --target % sw;
1963 * The AI characters will be turned into overwrite characters if the
1964 * cursor immediately follows them. We test both the cursor position
1965 * and the indent flag because there's no single test. (^T can only
1966 * be detected by the cursor position, and while we know that the test
1967 * is always true for ^D, the cursor can be in more than one place, as
1968 * "0^D" and "^D" are different.)
1970 ai_reset = !isindent || tp->cno == tp->ai + tp->offset;
1973 * Back up over any previous <blank> characters, changing them into
1974 * overwrite characters (including any ai characters). Then figure
1975 * out the current screen column.
1977 for (; tp->cno > tp->offset &&
1978 (tp->lb[tp->cno - 1] == ' ' || tp->lb[tp->cno - 1] == '\t');
1979 --tp->cno, ++tp->owrite);
1980 for (current = cno = 0; cno < tp->cno; ++cno)
1981 current += tp->lb[cno] == '\t' ?
1982 COL_OFF(current, ts) : KEY_LEN(sp, tp->lb[cno]);
1985 * If we didn't move up to or past the target, it's because there
1986 * weren't enough characters to delete, e.g. the first character
1987 * of the line was a tp->offset character, and the user entered
1988 * ^D to move to the beginning of a line. An example of this is:
1990 * :set ai sw=4<cr>i<space>a<esc>i^T^D
1992 * Otherwise, count up the total spaces/tabs needed to get from the
1993 * beginning of the line (or the last non-<blank> character) to the
1996 if (current >= target)
2000 tabs = 0; cno + COL_OFF(cno, ts) <= target; ++tabs)
2001 cno += COL_OFF(cno, ts);
2002 spaces = target - cno;
2005 /* If we overwrote ai characters, reset the ai count. */
2007 tp->ai = tabs + spaces;
2010 * Call txt_insch() to insert each character, so that we get the
2011 * correct effect when we add a <tab> to replace N <spaces>.
2013 for (ch = '\t'; tabs > 0; --tabs)
2014 (void)txt_insch(sp, tp, &ch, 0);
2015 for (ch = ' '; spaces > 0; --spaces)
2016 (void)txt_insch(sp, tp, &ch, 0);
2022 * File name completion.
2025 txt_fc(sp, tp, redrawp)
2034 size_t indx, len, nlen, off;
2042 * Find the beginning of this "word" -- if we're at the beginning
2043 * of the line, it's a special case.
2049 retry: for (len = 0,
2050 off = tp->cno - 1, p = tp->lb + off;; --off, --p) {
2056 if (off == tp->ai || off == tp->offset)
2061 * Get enough space for a wildcard character.
2064 * This won't work for "foo\", since the \ will escape the expansion
2065 * character. I'm not sure if that's a bug or not...
2068 BINC_RET(sp, tp->lb, tp->lb_len, tp->len + 1);
2074 /* Build an ex command, and call the ex expansion routines. */
2075 ex_cinit(&cmd, 0, 0, OOBLNO, OOBLNO, 0, NULL);
2076 if (argv_init(sp, &cmd))
2078 if (argv_exp2(sp, &cmd, p, len + 1)) {
2088 case 0: /* No matches. */
2090 (void)sp->gp->scr_bell(sp);
2092 case 1: /* One match. */
2093 /* If something changed, do the exchange. */
2094 nlen = strlen(cmd.argv[0]->bp);
2095 if (len != nlen || memcmp(cmd.argv[0]->bp, p, len))
2098 /* If haven't done a directory test, do it now. */
2100 !stat(cmd.argv[0]->bp, &sb) && S_ISDIR(sb.st_mode)) {
2105 /* If nothing changed, period, ring the bell. */
2107 (void)sp->gp->scr_bell(sp);
2109 default: /* Multiple matches. */
2111 if (txt_fc_col(sp, argc, argv))
2114 /* Find the length of the shortest match. */
2115 for (nlen = cmd.argv[0]->len; --argc > 0;) {
2116 if (cmd.argv[argc]->len < nlen)
2117 nlen = cmd.argv[argc]->len;
2118 for (indx = 0; indx < nlen &&
2119 cmd.argv[argc]->bp[indx] == cmd.argv[0]->bp[indx];
2126 /* Overwrite the expanded text first. */
2127 for (t = cmd.argv[0]->bp; len > 0 && nlen > 0; --len, --nlen)
2130 /* If lost text, make the remaining old text overwrite characters. */
2136 /* Overwrite any overwrite characters next. */
2137 for (; nlen > 0 && tp->owrite > 0; --nlen, --tp->owrite, ++tp->cno)
2140 /* Shift remaining text up, and move the cursor to the end. */
2143 BINC_RET(sp, tp->lb, tp->lb_len, tp->len + nlen);
2149 if (tp->insert != 0)
2150 (void)memmove(p + nlen, p, tp->insert);
2155 /* If a single match and it's a directory, retry it. */
2156 if (argc == 1 && !stat(cmd.argv[0]->bp, &sb) && S_ISDIR(sb.st_mode)) {
2157 isdir: if (tp->owrite == 0) {
2159 BINC_RET(sp, tp->lb, tp->lb_len, tp->len + 1);
2161 if (tp->insert != 0)
2162 (void)memmove(p + 1, p, tp->insert);
2178 * Display file names for file name completion.
2181 txt_fc_col(sp, argc, argv)
2189 size_t base, cnt, col, colwidth, numrows, numcols, prefix, row;
2194 /* Trim any directory prefix common to all of the files. */
2195 if ((p = strrchr(argv[0]->bp, '/')) == NULL)
2198 prefix = (p - argv[0]->bp) + 1;
2199 for (ac = argc - 1, av = argv + 1; ac > 0; --ac, ++av)
2200 if (av[0]->len < prefix ||
2201 memcmp(av[0]->bp, argv[0]->bp, prefix)) {
2208 * Figure out the column width for the longest name. Output is done on
2209 * 6 character "tab" boundaries for no particular reason. (Since we
2210 * don't output tab characters, we ignore the terminal's tab settings.)
2211 * Ignore the user's tab setting because we have no idea how reasonable
2214 for (ac = argc, av = argv, colwidth = 0; ac > 0; --ac, ++av) {
2215 for (col = 0, p = av[0]->bp + prefix; *p != '\0'; ++p)
2216 col += KEY_LEN(sp, *p);
2220 colwidth += COL_OFF(colwidth, 6);
2223 * Writing to the bottom line of the screen is always turned off when
2224 * SC_TINPUT_INFO is set. Turn it back on, we know what we're doing.
2226 if (F_ISSET(sp, SC_TINPUT_INFO)) {
2228 F_CLR(sp, SC_TINPUT_INFO);
2233 if (F_ISSET(gp, G_INTERRUPTED)) \
2236 /* If the largest file name is too large, just print them. */
2237 if (colwidth > sp->cols) {
2238 for (ac = argc, av = argv; ac > 0; --ac, ++av) {
2239 p = msg_print(sp, av[0]->bp + prefix, &nf);
2240 (void)ex_printf(sp, "%s\n", p);
2241 if (F_ISSET(gp, G_INTERRUPTED))
2245 FREE_SPACE(sp, p, 0);
2248 /* Figure out the number of columns. */
2249 numcols = (sp->cols - 1) / colwidth;
2250 if (argc > numcols) {
2251 numrows = argc / numcols;
2257 /* Display the files in sorted order. */
2258 for (row = 0; row < numrows; ++row) {
2259 for (base = row, col = 0; col < numcols; ++col) {
2260 p = msg_print(sp, argv[base]->bp + prefix, &nf);
2261 cnt = ex_printf(sp, "%s", p);
2263 FREE_SPACE(sp, p, 0);
2265 if ((base += numrows) >= argc)
2268 "%*s", (int)(colwidth - cnt), "");
2271 (void)ex_puts(sp, "\n");
2274 (void)ex_puts(sp, "\n");
2277 (void)ex_fflush(sp);
2280 intr: F_CLR(gp, G_INTERRUPTED);
2283 F_SET(sp, SC_TINPUT_INFO);
2290 * Set the end mark on the line.
2293 txt_emark(sp, tp, cno)
2299 size_t chlen, nlen, olen;
2305 * The end mark may not be the same size as the current character.
2306 * Don't let the line shift.
2308 nlen = KEY_LEN(sp, ch);
2309 if (tp->lb[cno] == '\t')
2310 (void)vs_columns(sp, tp->lb, tp->lno, &cno, &olen);
2312 olen = KEY_LEN(sp, tp->lb[cno]);
2315 * If the line got longer, well, it's weird, but it's easy. If
2316 * it's the same length, it's easy. If it got shorter, we have
2320 BINC_RET(sp, tp->lb, tp->lb_len, tp->len + olen);
2321 chlen = olen - nlen;
2322 if (tp->insert != 0)
2323 memmove(tp->lb + cno + 1 + chlen,
2324 tp->lb + cno + 1, tp->insert);
2327 tp->owrite += chlen;
2329 if (tp->lb[cno] == '\t')
2330 for (cno += chlen; chlen--;)
2333 for (kp = KEY_NAME(sp, tp->lb[cno]),
2334 cno += chlen; chlen--;)
2338 return (vs_change(sp, tp->lno, LINE_RESET));
2343 * Handle an error during input processing.
2353 * The problem with input processing is that the cursor is at an
2354 * indeterminate position since some input may have been lost due
2355 * to a malloc error. So, try to go back to the place from which
2356 * the cursor started, knowing that it may no longer be available.
2358 * We depend on at least one line number being set in the text
2361 for (lno = tiqh->cqh_first->lno;
2362 !db_exist(sp, lno) && lno > 0; --lno);
2364 sp->lno = lno == 0 ? 1 : lno;
2367 /* Redraw the screen, just in case. */
2368 F_SET(sp, SC_SCR_REDRAW);
2373 * Let the user insert any character value they want.
2376 * This is an extension. The pattern "^X[0-9a-fA-F]*" is a way
2377 * for the user to specify a character value which their keyboard
2378 * may not be able to enter.
2391 * Null-terminate the string. Since nul isn't a legal hex value,
2392 * this should be okay, and lets us use a local routine, which
2393 * presumably understands the character set, to convert the value.
2395 savec = tp->lb[tp->cno];
2396 tp->lb[tp->cno] = 0;
2398 /* Find the previous CH_HEX character. */
2399 for (off = tp->cno - 1, p = tp->lb + off, len = 0;; --p, --off, ++len) {
2404 /* Not on this line? Shouldn't happen. */
2405 if (off == tp->ai || off == tp->offset)
2409 /* If length of 0, then it wasn't a hex value. */
2413 /* Get the value. */
2415 value = strtol(wp, NULL, 16);
2416 if (errno || value > MAX_CHAR_T) {
2417 nothex: tp->lb[tp->cno] = savec;
2421 /* Restore the original character. */
2422 tp->lb[tp->cno] = savec;
2424 /* Adjust the bookkeeping. */
2427 tp->lb[tp->cno - 1] = value;
2429 /* Copy down any overwrite characters. */
2431 memmove(tp->lb + tp->cno, tp->lb + tp->cno + len, tp->owrite);
2433 /* Copy down any insert characters. */
2435 memmove(tp->lb + tp->cno + tp->owrite,
2436 tp->lb + tp->cno + tp->owrite + len, tp->insert);
2445 * Historic vi did a special screen optimization for tab characters. As an
2446 * example, for the keystrokes "iabcd<esc>0C<tab>", the tab overwrote the
2447 * rest of the string when it was displayed.
2449 * Because early versions of this implementation redisplayed the entire line
2450 * on each keystroke, the "bcd" was pushed to the right as it ignored that
2451 * the user had "promised" to change the rest of the characters. However,
2452 * the historic vi implementation had an even worse bug: given the keystrokes
2453 * "iabcd<esc>0R<tab><esc>", the "bcd" disappears, and magically reappears
2454 * on the second <esc> key.
2456 * POSIX 1003.2 requires (will require) that this be fixed, specifying that
2457 * vi overwrite characters the user has committed to changing, on the basis
2458 * of the screen space they require, but that it not overwrite other characters.
2461 txt_insch(sp, tp, chp, flags)
2468 size_t chlen, cno, copydown, olen, nlen;
2472 * The 'R' command does one-for-one replacement, because there's
2473 * no way to know how many characters the user intends to replace.
2475 if (LF_ISSET(TXT_REPLACE)) {
2478 tp->lb[tp->cno++] = *chp;
2481 } else if (tp->owrite) { /* Overwrite a character. */
2485 * If the old or new characters are tabs, then the length of the
2486 * display depends on the character position in the display. We
2487 * don't even try to handle this here, just ask the screen.
2490 savech = tp->lb[cno];
2492 (void)vs_columns(sp, tp->lb, tp->lno, &cno, &nlen);
2493 tp->lb[cno] = savech;
2495 nlen = KEY_LEN(sp, *chp);
2498 * Eat overwrite characters until we run out of them or we've
2499 * handled the length of the new character. If we only eat
2500 * part of an overwrite character, break it into its component
2501 * elements and display the remaining components.
2503 for (copydown = 0; nlen != 0 && tp->owrite != 0;) {
2506 if (tp->lb[cno] == '\t')
2507 (void)vs_columns(sp,
2508 tp->lb, tp->lno, &cno, &olen);
2510 olen = KEY_LEN(sp, tp->lb[cno]);
2521 tp->lb, tp->lb_len, tp->len + olen);
2522 chlen = olen - nlen;
2523 memmove(tp->lb + cno + 1 + chlen,
2524 tp->lb + cno + 1, tp->owrite + tp->insert);
2527 tp->owrite += chlen;
2528 if (tp->lb[cno] == '\t')
2529 for (p = tp->lb + cno + 1; chlen--;)
2533 KEY_NAME(sp, tp->lb[cno]) + nlen,
2534 p = tp->lb + cno + 1; chlen--;)
2542 * If had to erase several characters, we adjust the total
2543 * count, and if there are any characters left, shift them
2546 if (copydown != 0 && (tp->len -= copydown) != 0)
2547 memmove(tp->lb + cno, tp->lb + cno + copydown,
2548 tp->owrite + tp->insert + copydown);
2550 /* If we had enough overwrite characters, we're done. */
2552 tp->lb[tp->cno++] = *chp;
2557 /* Check to see if the character fits into the input buffer. */
2558 BINC_RET(sp, tp->lb, tp->lb_len, tp->len + 1);
2561 if (tp->insert) { /* Insert a character. */
2562 if (tp->insert == 1)
2563 tp->lb[tp->cno + 1] = tp->lb[tp->cno];
2565 memmove(tp->lb + tp->cno + 1,
2566 tp->lb + tp->cno, tp->owrite + tp->insert);
2568 tp->lb[tp->cno++] = *chp;
2574 * Do an incremental search.
2577 txt_isrch(sp, vp, tp, is_flagsp)
2581 u_int8_t *is_flagsp;
2587 /* If it's a one-line screen, we don't do incrementals. */
2588 if (IS_ONELINE(sp)) {
2589 FL_CLR(*is_flagsp, IS_RUNNING);
2594 * If the user erases back to the beginning of the buffer, there's
2595 * nothing to search for. Reset the cursor to the starting point.
2598 vp->m_final = vp->m_start;
2603 * If it's an RE quote character, and not quoted, ignore it until
2604 * we get another character.
2606 if (tp->lb[tp->cno - 1] == '\\' &&
2607 (tp->cno == 2 || tp->lb[tp->cno - 2] != '\\'))
2611 * If it's a magic shell character, and not quoted, reset the cursor
2612 * to the starting point.
2614 if (strchr(O_STR(sp, O_SHELLMETA), tp->lb[tp->cno - 1]) != NULL &&
2615 (tp->cno == 2 || tp->lb[tp->cno - 2] != '\\'))
2616 vp->m_final = vp->m_start;
2619 * If we see the search pattern termination character, then quit doing
2620 * an incremental search. There may be more, e.g., ":/foo/;/bar/",
2621 * and we can't handle that incrementally. Also, reset the cursor to
2622 * the original location, the ex search routines don't know anything
2623 * about incremental searches.
2625 if (tp->lb[0] == tp->lb[tp->cno - 1] &&
2626 (tp->cno == 2 || tp->lb[tp->cno - 2] != '\\')) {
2627 vp->m_final = vp->m_start;
2628 FL_CLR(*is_flagsp, IS_RUNNING);
2633 * Remember the input line and discard the special input map,
2634 * but don't overwrite the input line on the screen.
2637 F_SET(VIP(sp), VIP_S_MODELINE);
2638 F_CLR(sp, SC_TINPUT | SC_TINPUT_INFO);
2639 if (txt_map_end(sp))
2643 * Specify a starting point and search. If we find a match, move to
2644 * it and refresh the screen. If we didn't find the match, then we
2645 * beep the screen. When searching from the original cursor position,
2646 * we have to move the cursor, otherwise, we don't want to move the
2647 * cursor in case the text at the current position continues to match.
2649 if (FL_ISSET(*is_flagsp, IS_RESTART)) {
2650 start = vp->m_start;
2653 start = vp->m_final;
2654 sf = SEARCH_INCR | SEARCH_SET;
2657 if (tp->lb[0] == '/' ?
2659 &start, &vp->m_final, tp->lb + 1, tp->cno - 1, NULL, sf) :
2661 &start, &vp->m_final, tp->lb + 1, tp->cno - 1, NULL, sf)) {
2662 sp->lno = vp->m_final.lno;
2663 sp->cno = vp->m_final.cno;
2664 FL_CLR(*is_flagsp, IS_RESTART);
2666 if (!KEYS_WAITING(sp) && vs_refresh(sp, 0))
2669 FL_SET(*is_flagsp, IS_RESTART);
2671 /* Reinstantiate the special input map. */
2672 if (txt_map_init(sp))
2674 F_CLR(VIP(sp), VIP_S_MODELINE);
2675 F_SET(sp, SC_TINPUT | SC_TINPUT_INFO);
2677 /* Reset the line number of the input line. */
2678 tp->lno = TMAP[0].lno;
2681 * If the colon command-line moved, i.e. the screen scrolled,
2682 * refresh the input line.
2685 * We shouldn't be calling vs_line, here -- we need dirty bits
2686 * on entries in the SMAP array.
2688 if (lno != TMAP[0].lno) {
2689 if (vs_line(sp, &TMAP[0], NULL, NULL))
2691 (void)sp->gp->scr_refresh(sp, 0);
2698 * Resolve the input text chain into the file.
2701 txt_resolve(sp, tiqh, flags)
2712 * The first line replaces a current line, and all subsequent lines
2713 * are appended into the file. Resolve autoindented characters for
2714 * each line before committing it. If the latter causes the line to
2715 * change, we have to redisplay it, otherwise the information cached
2716 * about the line will be wrong.
2719 tp = tiqh->cqh_first;
2721 if (LF_ISSET(TXT_AUTOINDENT))
2722 txt_ai_resolve(sp, tp, &changed);
2725 if (db_set(sp, tp->lno, tp->lb, tp->len) ||
2726 changed && vs_change(sp, tp->lno, LINE_RESET))
2729 for (lno = tp->lno; (tp = tp->q.cqe_next) != (void *)&sp->tiq; ++lno) {
2730 if (LF_ISSET(TXT_AUTOINDENT))
2731 txt_ai_resolve(sp, tp, &changed);
2734 if (db_append(sp, 0, lno, tp->lb, tp->len) ||
2735 changed && vs_change(sp, tp->lno, LINE_RESET))
2740 * Clear the input flag, the look-aside buffer is no longer valid.
2741 * Has to be done as part of text resolution, or upon return we'll
2742 * be looking at incorrect data.
2744 F_CLR(sp, SC_TINPUT);
2751 * Show a character match.
2754 * Historic vi tried to display matches even in the :colon command line.
2758 txt_showmatch(sp, tp)
2765 int cnt, endc, startc;
2770 * Do a refresh first, in case we haven't done one in awhile,
2771 * so the user can see what we're complaining about.
2773 UPDATE_POSITION(sp, tp);
2774 if (vs_refresh(sp, 1))
2778 * We don't display the match if it's not on the screen. Find
2779 * out what the first character on the screen is.
2781 if (vs_sm_position(sp, &m, 0, P_TOP))
2784 /* Initialize the getc() interface. */
2785 cs.cs_lno = tp->lno;
2786 cs.cs_cno = tp->cno - 1;
2787 if (cs_init(sp, &cs))
2789 startc = (endc = cs.cs_ch) == ')' ? '(' : '{';
2791 /* Search for the match. */
2793 if (cs_prev(sp, &cs))
2795 if (cs.cs_flags != 0) {
2796 if (cs.cs_flags == CS_EOF || cs.cs_flags == CS_SOF) {
2798 "Unmatched %s", KEY_NAME(sp, endc));
2803 if (cs.cs_ch == endc)
2805 else if (cs.cs_ch == startc && --cnt == 0)
2809 /* If the match is on the screen, move to it. */
2810 if (cs.cs_lno < m.lno || cs.cs_lno == m.lno && cs.cs_cno < m.cno)
2812 sp->lno = cs.cs_lno;
2813 sp->cno = cs.cs_cno;
2814 if (vs_refresh(sp, 1))
2817 /* Wait for timeout or character arrival. */
2818 return (v_event_get(sp,
2819 NULL, O_VAL(sp, O_MATCHTIME) * 100, EC_TIMEOUT));
2824 * Handle margin wrap.
2827 txt_margin(sp, tp, wmtp, didbreak, flags)
2837 /* Find the nearest previous blank. */
2838 for (off = tp->cno - 1, p = tp->lb + off, len = 0;; --off, --p, ++len) {
2845 * If reach the start of the line, there's nowhere to break.
2848 * Historic vi belled each time a character was entered after
2849 * crossing the margin until a space was entered which could
2850 * be used to break the line. I don't as it tends to wake the
2853 if (off == tp->ai || off == tp->offset) {
2860 * Store saved information about the rest of the line in the
2861 * wrapmargin TEXT structure.
2864 * The offset field holds the length of the current characters
2865 * that the user entered, but which are getting split to the new
2866 * line -- it's going to be used to set the cursor value when we
2867 * move to the new line.
2872 wmtp->insert = LF_ISSET(TXT_APPENDEOL) ? tp->insert - 1 : tp->insert;
2873 wmtp->owrite = tp->owrite;
2875 /* Correct current bookkeeping information. */
2877 if (LF_ISSET(TXT_APPENDEOL)) {
2878 tp->len -= len + tp->owrite + (tp->insert - 1);
2881 tp->len -= len + tp->owrite + tp->insert;
2888 * Delete any trailing whitespace from the current line.
2890 for (;; --p, --off) {
2895 if (off == tp->ai || off == tp->offset)
2904 * Resolve the input line for the 'R' command.
2907 txt_Rresolve(sp, tiqh, tp, orig_len)
2911 const size_t orig_len;
2914 size_t input_len, retain;
2918 * Check to make sure that the cursor hasn't moved beyond
2919 * the end of the line.
2921 if (tp->owrite == 0)
2925 * Calculate how many characters the user has entered,
2926 * plus the blanks erased by <carriage-return>/<newline>s.
2928 for (ttp = tiqh->cqh_first, input_len = 0;;) {
2929 input_len += ttp == tp ? tp->cno : ttp->len + ttp->R_erase;
2930 if ((ttp = ttp->q.cqe_next) == (void *)&sp->tiq)
2935 * If the user has entered less characters than the original line
2936 * was long, restore any overwriteable characters to the original
2937 * characters. These characters are entered as "insert characters",
2938 * because they're after the cursor and we don't want to lose them.
2939 * (This is okay because the R command has no insert characters.)
2940 * We set owrite to 0 so that the insert characters don't get copied
2941 * to somewhere else, which means that the line and the length have
2942 * to be adjusted here as well.
2944 * We have to retrieve the original line because the original pinned
2945 * page has long since been discarded. If it doesn't exist, that's
2946 * okay, the user just extended the file.
2948 if (input_len < orig_len) {
2949 retain = MIN(tp->owrite, orig_len - input_len);
2951 tiqh->cqh_first->lno, DBG_FATAL | DBG_NOCACHE, &p, NULL))
2953 memcpy(tp->lb + tp->cno, p + input_len, retain);
2954 tp->len -= tp->owrite - retain;
2956 tp->insert += retain;
2962 * No more characters message.
2968 msgq(sp, M_BERR, "194|No more characters to erase");