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.
12 #include <sys/types.h>
13 #include <sys/queue.h>
16 #include <bitstring.h>
25 #include "../common/common.h"
28 static int txt_abbrev(SCR *, TEXT *, CHAR_T *, int, int *, int *);
29 static void txt_ai_resolve(SCR *, TEXT *, int *);
30 static TEXT *txt_backup(SCR *, TEXTH *, TEXT *, u_int32_t *);
31 static int txt_dent(SCR *, TEXT *, int, int);
32 static int txt_emark(SCR *, TEXT *, size_t);
33 static void txt_err(SCR *, TEXTH *);
34 static int txt_fc(SCR *, TEXT *, int *);
35 static int txt_fc_col(SCR *, int, ARGS **);
36 static int txt_hex(SCR *, TEXT *);
37 static int txt_insch(SCR *, TEXT *, CHAR_T *, u_int);
38 static int txt_isrch(SCR *, VICMD *, TEXT *, u_int8_t *);
39 static int txt_map_end(SCR *);
40 static int txt_map_init(SCR *);
41 static int txt_margin(SCR *, TEXT *, TEXT *, int *, u_int32_t);
42 static void txt_nomorech(SCR *);
43 static void txt_Rresolve(SCR *, TEXTH *, TEXT *, const size_t);
44 static int txt_resolve(SCR *, TEXTH *, u_int32_t);
45 static int txt_showmatch(SCR *, TEXT *);
46 static void txt_unmap(SCR *, TEXT *, u_int32_t *);
48 /* Cursor character (space is hard to track on the screen). */
49 #if defined(DEBUG) && 0
56 * Fill a buffer from the terminal for vi.
58 * PUBLIC: int v_tcmd(SCR *, VICMD *, ARG_CHAR_T, u_int);
61 v_tcmd(SCR *sp, VICMD *vp, ARG_CHAR_T prompt, u_int flags)
63 /* Normally, we end up where we started. */
64 vp->m_final.lno = sp->lno;
65 vp->m_final.cno = sp->cno;
67 /* Initialize the map. */
71 /* Move to the last line. */
72 sp->lno = TMAP[0].lno;
75 /* Don't update the modeline for now. */
76 F_SET(sp, SC_TINPUT_INFO);
78 /* Set the input flags. */
79 LF_SET(TXT_APPENDEOL |
80 TXT_CR | TXT_ESCAPE | TXT_INFOLINE | TXT_MAPINPUT);
81 if (O_ISSET(sp, O_ALTWERASE))
82 LF_SET(TXT_ALTWERASE);
83 if (O_ISSET(sp, O_TTYWERASE))
84 LF_SET(TXT_TTYWERASE);
86 /* Do the input thing. */
87 if (v_txt(sp, vp, NULL, NULL, 0, prompt, 0, 1, flags))
90 /* Reenable the modeline updates. */
91 F_CLR(sp, SC_TINPUT_INFO);
93 /* Clean up the map. */
98 F_SET(sp, SC_SCR_REDRAW); /* XXX */
100 /* Set the cursor to the resulting position. */
101 sp->lno = vp->m_final.lno;
102 sp->cno = vp->m_final.cno;
109 * Initialize the screen map for colon command-line input.
112 txt_map_init(SCR *sp)
118 if (!IS_ONELINE(sp)) {
120 * Fake like the user is doing input on the last line of the
121 * screen. This makes all of the scrolling work correctly,
122 * and allows us the use of the vi text editing routines, not
123 * to mention practically infinite length ex commands.
125 * Save the current location.
127 vip->sv_tm_lno = TMAP->lno;
128 vip->sv_tm_soff = TMAP->soff;
129 vip->sv_tm_coff = TMAP->coff;
130 vip->sv_t_maxrows = sp->t_maxrows;
131 vip->sv_t_minrows = sp->t_minrows;
132 vip->sv_t_rows = sp->t_rows;
135 * If it's a small screen, TMAP may be small for the screen.
136 * Fix it, filling in fake lines as we go.
140 HMAP + (sp->t_maxrows - 1); TMAP < esmp; ++TMAP) {
141 TMAP[1].lno = TMAP[0].lno + 1;
142 TMAP[1].coff = HMAP->coff;
146 /* Build the fake entry. */
147 TMAP[1].lno = TMAP[0].lno + 1;
150 SMAP_FLUSH(&TMAP[1]);
153 /* Reset the screen information. */
154 sp->t_rows = sp->t_minrows = ++sp->t_maxrows;
161 * Reset the screen map for colon command-line input.
170 if (!IS_ONELINE(sp)) {
171 /* Restore the screen information. */
172 sp->t_rows = vip->sv_t_rows;
173 sp->t_minrows = vip->sv_t_minrows;
174 sp->t_maxrows = vip->sv_t_maxrows;
177 * If it's a small screen, TMAP may be wrong. Clear any
178 * lines that might have been overwritten.
181 for (cnt = sp->t_rows; cnt <= sp->t_maxrows; ++cnt) {
182 (void)sp->gp->scr_move(sp, cnt, 0);
183 (void)sp->gp->scr_clrtoeol(sp);
185 TMAP = HMAP + (sp->t_rows - 1);
190 * The map may be wrong if the user entered more than one
191 * (logical) line. Fix it. If the user entered a whole
192 * screen, this will be slow, but we probably don't care.
194 if (!O_ISSET(sp, O_LEFTRIGHT))
195 while (vip->sv_tm_lno != TMAP->lno ||
196 vip->sv_tm_soff != TMAP->soff)
202 * Invalidate the cursor and the line size cache, the line never
203 * really existed. This fixes bugs where the user searches for
204 * the last line on the screen + 1 and the refresh routine thinks
205 * that's where we just were.
208 F_SET(vip, VIP_CUR_INVALID);
214 * If doing input mapping on the colon command line, may need to unmap
215 * based on the command.
218 FL_ISSET(ec_flags, EC_MAPINPUT) && LF_ISSET(TXT_INFOLINE)
221 * Internally, we maintain tp->lno and tp->cno, externally, everyone uses
222 * sp->lno and sp->cno. Make them consistent as necessary.
224 #define UPDATE_POSITION(sp, tp) { \
225 (sp)->lno = (tp)->lno; \
226 (sp)->cno = (tp)->cno; \
233 * PUBLIC: int v_txt(SCR *, VICMD *, MARK *,
234 * PUBLIC: const CHAR_T *, size_t, ARG_CHAR_T, recno_t, u_long, u_int32_t);
240 MARK *tm, /* To MARK. */
241 const CHAR_T *lp, /* Input line. */
242 size_t len, /* Input line length. */
243 ARG_CHAR_T prompt, /* Prompt to display. */
244 recno_t ai_line, /* Line number to use for autoindent count. */
245 u_long rcount, /* Replay count. */
246 u_int32_t flags) /* TXT_* flags. */
248 EVENT ev, *evp = NULL; /* Current event. */
249 EVENT fc; /* File name completion event. */
251 TEXT *ntp, *tp; /* Input text structures. */
252 TEXT ait; /* Autoindent text structure. */
253 TEXT wmt = {{ 0 }}; /* Wrapmargin text structure. */
256 abb_t abb; /* State of abbreviation checks. */
257 carat_t carat; /* State of the "[^0]^D" sequences. */
258 quote_t quote; /* State of quotation. */
259 size_t owrite, insert; /* Temporary copies of TEXT fields. */
260 size_t margin; /* Wrapmargin value. */
261 size_t rcol; /* 0-N: insert offset in the replay buffer. */
262 size_t tcol; /* Temporary column. */
263 u_int32_t ec_flags; /* Input mapping flags. */
264 #define IS_RESTART 0x01 /* Reset the incremental search. */
265 #define IS_RUNNING 0x02 /* Incremental search turned on. */
267 int abcnt, ab_turnoff; /* Abbreviation character count, switch. */
268 int filec_redraw; /* Redraw after the file completion routine. */
269 int hexcnt; /* Hex character count. */
270 int showmatch; /* Showmatch set on this character. */
271 int wm_set, wm_skip; /* Wrapmargin happened, blank skip flags. */
280 * Set the input flag, so tabs get displayed correctly
281 * and everyone knows that the text buffer is in use.
283 F_SET(sp, SC_TINPUT);
286 * Get one TEXT structure with some initial buffer space, reusing
287 * the last one if it's big enough. (All TEXT bookkeeping fields
288 * default to 0 -- text_init() handles this.) If changing a line,
289 * copy it into the TEXT buffer.
292 if (!TAILQ_EMPTY(tiqh)) {
293 tp = TAILQ_FIRST(tiqh);
294 if (TAILQ_NEXT(tp, q) != NULL ||
295 tp->lb_len < (len + 32) * sizeof(CHAR_T)) {
299 tp->ai = tp->insert = tp->offset = tp->owrite = 0;
302 BINC_RETW(sp, tp->lb, tp->lb_len, len);
303 MEMMOVE(tp->lb, lp, len);
307 newtp: if ((tp = text_init(sp, lp, len, len + 32)) == NULL)
309 TAILQ_INSERT_HEAD(tiqh, tp, q);
312 /* Set default termination condition. */
315 /* Set the starting line, column. */
320 * Set the insert and overwrite counts. If overwriting characters,
321 * do insertion afterward. If not overwriting characters, assume
322 * doing insertion. If change is to a mark, emphasize it with an
323 * CH_ENDMARK character.
326 if (LF_ISSET(TXT_OVERWRITE)) {
327 tp->owrite = (tm->cno - tp->cno) + 1;
328 tp->insert = (len - tm->cno) - 1;
330 tp->insert = len - tp->cno;
332 if (LF_ISSET(TXT_EMARK) && txt_emark(sp, tp, tm->cno))
337 * Many of the special cases in text input are to handle autoindent
338 * support. Somebody decided that it would be a good idea if "^^D"
339 * and "0^D" deleted all of the autoindented characters. In an editor
340 * that takes single character input from the user, this beggars the
341 * imagination. Note also, "^^D" resets the next lines' autoindent,
344 * We assume that autoindent only happens on empty lines, so insert
345 * and overwrite will be zero. If doing autoindent, figure out how
346 * much indentation we need and fill it in. Update input column and
347 * screen cursor as necessary.
349 if (LF_ISSET(TXT_AUTOINDENT) && ai_line != OOBLNO) {
350 if (v_txt_auto(sp, ai_line, NULL, 0, tp))
355 * The cc and S commands have a special feature -- leading
356 * <blank> characters are handled as autoindent characters.
359 if (LF_ISSET(TXT_AICHARS)) {
363 tp->offset = tp->cno;
366 /* If getting a command buffer from the user, there may be a prompt. */
367 if (LF_ISSET(TXT_PROMPT)) {
368 tp->lb[tp->cno++] = prompt;
374 * If appending after the end-of-line, add a space into the buffer
375 * and move the cursor right. This space is inserted, i.e. pushed
376 * along, and then deleted when the line is resolved. Assumes that
377 * the cursor is already positioned at the end of the line. This
378 * avoids the nastiness of having the cursor reside on a magical
379 * column, i.e. a column that doesn't really exist. The only down
380 * side is that we may wrap lines or scroll the screen before it's
381 * strictly necessary. Not a big deal.
383 if (LF_ISSET(TXT_APPENDEOL)) {
384 tp->lb[tp->cno] = CH_CURSOR;
387 (void)vs_change(sp, tp->lno, LINE_RESET);
391 * Historic practice is that the wrapmargin value was a distance
392 * from the RIGHT-HAND margin, not the left. It's more useful to
393 * us as a distance from the left-hand margin, i.e. the same as
394 * the wraplen value. The wrapmargin option is historic practice.
395 * Nvi added the wraplen option so that it would be possible to
396 * edit files with consistent margins without knowing the number of
397 * columns in the window.
400 * Setting margin causes a significant performance hit. Normally
401 * we don't update the screen if there are keys waiting, but we
402 * have to if margin is set, otherwise the screen routines don't
403 * know where the cursor is.
406 * Abbreviated keys were affected by the wrapmargin option in the
407 * historic 4BSD vi. Mapped keys were usually, but sometimes not.
408 * See the comment in vi/v_text():set_txt_std for more information.
411 * One more special case. If an inserted <blank> character causes
412 * wrapmargin to split the line, the next user entered character is
413 * discarded if it's a <space> character.
415 wm_set = wm_skip = 0;
416 if (LF_ISSET(TXT_WRAPMARGIN))
417 if ((margin = O_VAL(sp, O_WRAPMARGIN)) != 0)
418 margin = sp->cols - margin;
420 margin = O_VAL(sp, O_WRAPLEN);
424 /* Initialize abbreviation checks. */
425 abcnt = ab_turnoff = 0;
426 abb = F_ISSET(gp, G_ABBREV) &&
427 LF_ISSET(TXT_MAPINPUT) ? AB_INWORD : AB_NOTSET;
430 * Set up the dot command. Dot commands are done by saving the actual
431 * characters and then reevaluating them so that things like wrapmargin
432 * can change between the insert and the replay.
435 * Historically, vi did not remap or reabbreviate replayed input. (It
436 * did beep at you if you changed an abbreviation and then replayed the
437 * input. We're not that compatible.) We don't have to do anything to
438 * avoid remapping, as we're not getting characters from the terminal
439 * routines. Turn the abbreviation check off.
442 * It would be nice if we could swallow backspaces and such, but it's
443 * not all that easy to do. What we can do is turn off the common
444 * error messages during the replay. Otherwise, when the user enters
445 * an illegal command, e.g., "Ia<erase><erase><erase><erase>b<escape>",
446 * and then does a '.', they get a list of error messages after command
450 if (LF_ISSET(TXT_REPLAY)) {
455 /* Other text input mode setup. */
460 LF_ISSET(TXT_SEARCHINCR) ? IS_RESTART | IS_RUNNING : 0);
461 filec_redraw = hexcnt = showmatch = 0;
463 /* Initialize input flags. */
464 ec_flags = LF_ISSET(TXT_MAPINPUT) ? EC_MAPINPUT : 0;
466 /* Refresh the screen. */
467 UPDATE_POSITION(sp, tp);
468 if (vs_refresh(sp, 1))
471 /* If it's dot, just do it now. */
472 if (F_ISSET(vp, VC_ISDOT))
477 next: if (v_event_get(sp, evp, 0, ec_flags))
481 * If file completion overwrote part of the screen and nothing else has
482 * been displayed, clean up. We don't do this as part of the normal
483 * message resolution because we know the user is on the colon command
484 * line and there's no reason to enter explicit characters to continue.
486 if (filec_redraw && !F_ISSET(sp, SC_SCR_EXWROTE)) {
489 fc.e_event = E_REPAINT;
490 fc.e_flno = vip->totalcount >=
491 sp->rows ? 1 : sp->rows - vip->totalcount;
492 fc.e_tlno = sp->rows;
493 vip->linecount = vip->lcontinue = vip->totalcount = 0;
494 (void)vs_repaint(sp, &fc);
495 (void)vs_refresh(sp, 1);
498 /* Deal with all non-character events. */
499 switch (evp->e_event) {
504 F_SET(sp, SC_EXIT_FORCE);
509 * Historically, <interrupt> exited the user from text input
510 * mode or cancelled a colon command, and returned to command
511 * mode. It also beeped the terminal, but that seems a bit
516 if (vs_repaint(sp, &ev))
520 /* <resize> interrupts the input mode. */
521 v_emsg(sp, NULL, VIM_WRESIZE);
524 v_event_err(sp, evp);
530 * If the first character of the input is a nul, replay the previous
531 * input. (Historically, it's okay to replay non-existent input.)
532 * This was not documented as far as I know, and is a great test of vi
535 if (LF_ISSET(TXT_RECORD) && rcol == 0 && evp->e_c == '\0') {
536 if (vip->rep == NULL)
546 * File name completion and colon command-line editing. We don't
547 * have enough meta characters, so we expect people to overload
548 * them. If the two characters are the same, then we do file name
549 * completion if the cursor is past the first column, and do colon
550 * command-line editing if it's not.
552 if (quote == Q_NOTSET) {
553 int L__cedit, L__filec;
555 L__cedit = L__filec = 0;
556 if (LF_ISSET(TXT_CEDIT) && O_STR(sp, O_CEDIT) != NULL &&
557 O_STR(sp, O_CEDIT)[0] == evp->e_c)
559 if (LF_ISSET(TXT_FILEC) && O_STR(sp, O_FILEC) != NULL &&
560 O_STR(sp, O_FILEC)[0] == evp->e_c)
562 if (L__cedit == 1 && (L__filec == 0 || tp->cno == tp->offset)) {
563 tp->term = TERM_CEDIT;
567 if (txt_fc(sp, tp, &filec_redraw))
573 /* Abbreviation overflow check. See comment in txt_abbrev(). */
574 #define MAX_ABBREVIATION_EXPANSION 256
575 if (F_ISSET(&evp->e_ch, CH_ABBREVIATED)) {
576 if (++abcnt > MAX_ABBREVIATION_EXPANSION) {
577 if (v_event_flush(sp, CH_ABBREVIATED))
579 "191|Abbreviation exceeded expansion limit: characters discarded");
581 if (LF_ISSET(TXT_REPLAY))
588 /* Check to see if the character fits into the replay buffers. */
589 if (LF_ISSET(TXT_RECORD)) {
590 BINC_GOTO(sp, EVENT, vip->rep,
591 vip->rep_len, (rcol + 1) * sizeof(EVENT));
592 vip->rep[rcol++] = *evp;
595 replay: if (LF_ISSET(TXT_REPLAY)) {
596 if (rcol == vip->rep_cnt)
598 evp = vip->rep + rcol++;
601 /* Wrapmargin check for leading space. */
608 /* If quoted by someone else, simply insert the character. */
609 if (F_ISSET(&evp->e_ch, CH_QUOTED))
614 * If this character was quoted by a K_VLNEXT, replace the placeholder
615 * (a carat) with the new character. We've already adjusted the cursor
616 * because it has to appear on top of the placeholder character.
619 * Skip tests for abbreviations; ":ab xa XA" followed by "ixa^V<space>"
620 * doesn't perform an abbreviation. Special case, ^V^J (not ^V^M) is
621 * the same as ^J, historically.
623 if (quote == Q_VTHIS) {
624 FL_CLR(ec_flags, EC_QUOTED);
625 if (LF_ISSET(TXT_MAPINPUT))
626 FL_SET(ec_flags, EC_MAPINPUT);
628 if (evp->e_value != K_NL) {
637 * Translate "<CH_HEX>[isxdigit()]*" to a character with a hex value:
638 * this test delimits the value by any non-hex character. Offset by
639 * one, we use 0 to mean that we've found <CH_HEX>.
641 if (hexcnt > 1 && !ISXDIGIT(evp->e_c)) {
647 switch (evp->e_value) {
648 case K_CR: /* Carriage return. */
649 case K_NL: /* New line. */
650 /* Return in script windows and the command line. */
651 k_cr: if (LF_ISSET(TXT_CR)) {
653 * If this was a map, we may have not displayed
654 * the line. Display it, just in case.
656 * If a script window and not the colon line,
657 * push a <cr> so it gets executed.
659 if (LF_ISSET(TXT_INFOLINE)) {
660 if (vs_change(sp, tp->lno, LINE_RESET))
662 } else if (F_ISSET(sp, SC_SCRIPT))
663 (void)v_event_push(sp, NULL, L("\r"), 1, CH_NOMAP);
665 /* Set term condition: if empty. */
666 if (tp->cno <= tp->offset)
669 * Set term condition: if searching incrementally and
670 * the user entered a pattern, return a completed
671 * search, regardless if the entire pattern was found.
673 if (FL_ISSET(is_flags, IS_RUNNING) &&
674 tp->cno >= tp->offset + 1)
675 tp->term = TERM_SEARCH;
680 #define LINE_RESOLVE { \
682 * Handle abbreviations. If there was one, discard the \
683 * replay characters. \
685 if (abb == AB_INWORD && \
686 !LF_ISSET(TXT_REPLAY) && F_ISSET(gp, G_ABBREV)) { \
687 if (txt_abbrev(sp, tp, &evp->e_c, \
688 LF_ISSET(TXT_INFOLINE), &tmp, \
692 if (LF_ISSET(TXT_RECORD)) \
697 if (abb != AB_NOTSET) \
700 txt_unmap(sp, tp, &ec_flags); \
702 * Delete any appended cursor. It's possible to get in \
703 * situations where TXT_APPENDEOL is set but tp->insert \
704 * is 0 when using the R command and all the characters \
705 * are tp->owrite characters. \
707 if (LF_ISSET(TXT_APPENDEOL) && tp->insert > 0) { \
715 * Save the current line information for restoration in
716 * txt_backup(), and set the line final length.
718 tp->sv_len = tp->len;
719 tp->sv_cno = tp->cno;
722 /* Update the old line. */
723 if (vs_change(sp, tp->lno, LINE_RESET))
727 * Historic practice, when the autoindent edit option was set,
728 * was to delete <blank> characters following the inserted
729 * newline. This affected the 'R', 'c', and 's' commands; 'c'
730 * and 's' retained the insert characters only, 'R' moved the
731 * overwrite and insert characters into the next TEXT structure.
732 * We keep track of the number of characters erased for the 'R'
733 * command so that the final resolution of the line is correct.
738 if (LF_ISSET(TXT_REPLACE) && owrite != 0) {
739 for (p = tp->lb + tp->cno; owrite > 0 && isblank(*p);
740 ++p, --owrite, ++tp->R_erase);
742 for (; insert > 0 && isblank(*p);
743 ++p, ++tp->R_erase, --insert);
745 p = tp->lb + tp->cno + owrite;
746 if (O_ISSET(sp, O_AUTOINDENT))
748 isblank(*p); ++p, --insert);
754 * Create a new line and insert the new TEXT into the queue.
755 * DON'T insert until the old line has been updated, or the
756 * inserted line count in line.c:db_get() will be wrong.
758 if ((ntp = text_init(sp, p,
759 insert + owrite, insert + owrite + 32)) == NULL)
761 TAILQ_INSERT_TAIL(sp->tiq, ntp, q);
763 /* Set up bookkeeping for the new line. */
764 ntp->insert = insert;
765 ntp->owrite = owrite;
766 ntp->lno = tp->lno + 1;
769 * Reset the autoindent line value. 0^D keeps the autoindent
770 * line from changing, ^D changes the level, even if there were
771 * no characters in the old line. Note, if using the current
772 * tp structure, use the cursor as the length, the autoindent
773 * characters may have been erased.
775 if (LF_ISSET(TXT_AUTOINDENT)) {
778 if (v_txt_auto(sp, OOBLNO, &ait, ait.ai, ntp))
780 FREE_SPACEW(sp, ait.lb, ait.lb_len);
782 if (v_txt_auto(sp, OOBLNO, tp, tp->cno, ntp))
787 /* Reset the cursor. */
791 * If we're here because wrapmargin was set and we've broken a
792 * line, there may be additional information (i.e. the start of
793 * a line) in the wmt structure.
796 if (wmt.offset != 0 ||
797 wmt.owrite != 0 || wmt.insert != 0) {
798 #define WMTSPACE wmt.offset + wmt.owrite + wmt.insert
799 BINC_GOTOW(sp, ntp->lb,
800 ntp->lb_len, ntp->len + WMTSPACE + 32);
801 MEMMOVE(ntp->lb + ntp->cno, wmt.lb, WMTSPACE);
802 ntp->len += WMTSPACE;
803 ntp->cno += wmt.offset;
804 ntp->owrite = wmt.owrite;
805 ntp->insert = wmt.insert;
810 /* New lines are TXT_APPENDEOL. */
811 if (ntp->owrite == 0 && ntp->insert == 0) {
812 BINC_GOTOW(sp, ntp->lb, ntp->lb_len, ntp->len + 1);
813 LF_SET(TXT_APPENDEOL);
814 ntp->lb[ntp->cno] = CH_CURSOR;
819 /* Swap old and new TEXT's, and update the new line. */
821 if (vs_change(sp, tp->lno, LINE_INSERT))
825 case K_ESCAPE: /* Escape. */
826 if (!LF_ISSET(TXT_ESCAPE))
829 /* If we have a count, start replaying the input. */
840 * Some commands (e.g. 'o') need a <newline> for each
843 if (LF_ISSET(TXT_ADDNEWLINE))
847 * The R command turns into the 'a' command after the
850 if (LF_ISSET(TXT_REPLACE)) {
851 tp->insert = tp->owrite;
858 /* Set term condition: if empty. */
859 if (tp->cno <= tp->offset)
862 * Set term condition: if searching incrementally and the user
863 * entered a pattern, return a completed search, regardless if
864 * the entire pattern was found.
866 if (FL_ISSET(is_flags, IS_RUNNING) && tp->cno >= tp->offset + 1)
867 tp->term = TERM_SEARCH;
869 k_escape: LINE_RESOLVE;
872 * Clean up for the 'R' command, restoring overwrite
873 * characters, and making them into insert characters.
875 if (LF_ISSET(TXT_REPLACE))
876 txt_Rresolve(sp, sp->tiq, tp, len);
879 * If there are any overwrite characters, copy down
880 * any insert characters, and decrement the length.
884 MEMMOVE(tp->lb + tp->cno,
885 tp->lb + tp->cno + tp->owrite, tp->insert);
886 tp->len -= tp->owrite;
890 * Optionally resolve the lines into the file. If not
891 * resolving the lines into the file, end the line with
892 * a nul. If the line is empty, then set the length to
893 * 0, the termination condition has already been set.
896 * This is wrong, should pass back a length.
898 if (LF_ISSET(TXT_RESOLVE)) {
899 if (txt_resolve(sp, sp->tiq, flags))
902 BINC_GOTOW(sp, tp->lb, tp->lb_len, tp->len + 1);
903 tp->lb[tp->len] = '\0';
907 * Set the return cursor position to rest on the last
908 * inserted character.
913 /* Update the last line. */
914 if (vs_change(sp, tp->lno, LINE_RESET))
917 case K_CARAT: /* Delete autoindent chars. */
918 if (tp->cno <= tp->ai && LF_ISSET(TXT_AUTOINDENT))
921 case K_ZERO: /* Delete autoindent chars. */
922 if (tp->cno <= tp->ai && LF_ISSET(TXT_AUTOINDENT))
925 case K_CNTRLD: /* Delete autoindent char. */
927 * If in the first column or no characters to erase, ignore
928 * the ^D (this matches historic practice). If not doing
929 * autoindent or already inserted non-ai characters, it's a
930 * literal. The latter test is done in the switch, as the
931 * CARAT forms are N + 1, not N.
933 if (!LF_ISSET(TXT_AUTOINDENT))
939 case C_CARATSET: /* ^^D */
940 if (tp->ai == 0 || tp->cno > tp->ai + tp->offset + 1)
943 /* Save the ai string for later. */
946 BINC_GOTOW(sp, ait.lb, ait.lb_len, tp->ai);
947 MEMMOVE(ait.lb, tp->lb, tp->ai);
948 ait.ai = ait.len = tp->ai;
953 case C_ZEROSET: /* 0^D */
954 if (tp->ai == 0 || tp->cno > tp->ai + tp->offset + 1)
958 leftmargin: tp->lb[tp->cno - 1] = ' ';
959 tp->owrite += tp->cno - tp->offset;
961 tp->cno = tp->offset;
963 case C_NOTSET: /* ^D */
964 if (tp->ai == 0 || tp->cno > tp->ai + tp->offset)
967 (void)txt_dent(sp, tp, O_SHIFTWIDTH, 0);
973 case K_VERASE: /* Erase the last character. */
974 /* If can erase over the prompt, return. */
975 if (tp->cno <= tp->offset && LF_ISSET(TXT_BS)) {
981 * If at the beginning of the line, try and drop back to a
982 * previously inserted line.
986 txt_backup(sp, sp->tiq, tp, &flags)) == NULL)
992 /* If nothing to erase, bell the user. */
993 if (tp->cno <= tp->offset) {
994 if (!LF_ISSET(TXT_REPLAY))
999 /* Drop back one character. */
1003 * Historically, vi didn't replace the erased characters with
1004 * <blank>s, presumably because it's easier to fix a minor
1005 * typing mistake and continue on if the previous letters are
1006 * already there. This is a problem for incremental searching,
1007 * because the user can no longer tell where they are in the
1008 * colon command line because the cursor is at the last search
1009 * point in the screen. So, if incrementally searching, erase
1010 * the erased characters from the screen.
1012 if (FL_ISSET(is_flags, IS_RUNNING))
1013 tp->lb[tp->cno] = ' ';
1016 * Increment overwrite, decrement ai if deleted.
1019 * Historic vi did not permit users to use erase characters
1020 * to delete autoindent characters. We do. Eat hot death,
1024 if (tp->cno < tp->ai)
1027 /* Reset if we deleted an incremental search character. */
1028 if (FL_ISSET(is_flags, IS_RUNNING))
1029 FL_SET(is_flags, IS_RESTART);
1031 case K_VWERASE: /* Skip back one word. */
1033 * If at the beginning of the line, try and drop back to a
1034 * previously inserted line.
1038 txt_backup(sp, sp->tiq, tp, &flags)) == NULL)
1044 * If at offset, nothing to erase so bell the user.
1046 if (tp->cno <= tp->offset) {
1047 if (!LF_ISSET(TXT_REPLAY))
1053 * The first werase goes back to any autoindent column and the
1054 * second werase goes back to the offset.
1057 * Historic vi did not permit users to use erase characters to
1058 * delete autoindent characters.
1060 if (tp->ai && tp->cno > tp->ai)
1067 /* Skip over trailing space characters. */
1068 while (tp->cno > max && ISBLANK(tp->lb[tp->cno - 1])) {
1075 * There are three types of word erase found on UNIX systems.
1076 * They can be identified by how the string /a/b/c is treated
1077 * -- as 1, 3, or 6 words. Historic vi had two classes of
1078 * characters, and strings were delimited by them and
1079 * <blank>'s, so, 6 words. The historic tty interface used
1080 * <blank>'s to delimit strings, so, 1 word. The algorithm
1081 * offered in the 4.4BSD tty interface (as stty altwerase)
1082 * treats it as 3 words -- there are two classes of
1083 * characters, and strings are delimited by them and
1084 * <blank>'s. The difference is that the type of the first
1085 * erased character erased is ignored, which is exactly right
1086 * when erasing pathname components. The edit options
1087 * TXT_ALTWERASE and TXT_TTYWERASE specify the 4.4BSD tty
1088 * interface and the historic tty driver behavior,
1089 * respectively, and the default is the same as the historic
1092 * Overwrite erased characters if doing incremental search;
1093 * see comment above.
1095 if (LF_ISSET(TXT_TTYWERASE))
1096 while (tp->cno > max) {
1097 if (ISBLANK(tp->lb[tp->cno - 1]))
1101 if (FL_ISSET(is_flags, IS_RUNNING))
1102 tp->lb[tp->cno] = ' ';
1105 if (LF_ISSET(TXT_ALTWERASE)) {
1108 if (FL_ISSET(is_flags, IS_RUNNING))
1109 tp->lb[tp->cno] = ' ';
1112 tmp = inword(tp->lb[tp->cno - 1]);
1113 while (tp->cno > max) {
1114 if (tmp != inword(tp->lb[tp->cno - 1])
1115 || ISBLANK(tp->lb[tp->cno - 1]))
1119 if (FL_ISSET(is_flags, IS_RUNNING))
1120 tp->lb[tp->cno] = ' ';
1124 /* Reset if we deleted an incremental search character. */
1125 if (FL_ISSET(is_flags, IS_RUNNING))
1126 FL_SET(is_flags, IS_RESTART);
1128 case K_VKILL: /* Restart this line. */
1131 * If at the beginning of the line, try and drop back to a
1132 * previously inserted line. Historic vi did not permit
1133 * users to go back to previous lines.
1137 txt_backup(sp, sp->tiq, tp, &flags)) == NULL)
1142 /* If at offset, nothing to erase so bell the user. */
1143 if (tp->cno <= tp->offset) {
1144 if (!LF_ISSET(TXT_REPLAY))
1150 * First kill goes back to any autoindent and second kill goes
1151 * back to the offset.
1154 * Historic vi did not permit users to use erase characters to
1155 * delete autoindent characters.
1157 if (tp->ai && tp->cno > tp->ai)
1163 tp->owrite += tp->cno - max;
1166 * Overwrite erased characters if doing incremental search;
1167 * see comment above.
1169 if (FL_ISSET(is_flags, IS_RUNNING))
1171 tp->lb[--tp->cno] = ' ';
1172 } while (tp->cno > max);
1176 /* Reset if we deleted an incremental search character. */
1177 if (FL_ISSET(is_flags, IS_RUNNING))
1178 FL_SET(is_flags, IS_RESTART);
1180 case K_CNTRLT: /* Add autoindent characters. */
1181 if (!LF_ISSET(TXT_CNTRLT))
1183 if (txt_dent(sp, tp, O_SHIFTWIDTH, 1))
1186 case K_VLNEXT: /* Quote next character. */
1190 * Turn on the quote flag so that the underlying routines
1191 * quote the next character where it's possible. Turn off
1192 * the input mapbiting flag so that we don't remap the next
1195 FL_SET(ec_flags, EC_QUOTED);
1196 FL_CLR(ec_flags, EC_MAPINPUT);
1200 * Skip the tests for abbreviations, so ":ab xa XA",
1201 * "ixa^V<space>" doesn't perform the abbreviation.
1208 if (sp->showmode != SM_COMMAND && quote != Q_VTHIS &&
1209 O_ISSET(sp, O_EXPANDTAB)) {
1210 if (txt_dent(sp, tp, O_TABSTOP, 1))
1215 default: /* Insert the character. */
1216 if (LF_ISSET(TXT_SHOWMATCH)) {
1217 CHAR_T *match_chars, *cp;
1219 match_chars = VIP(sp)->mcs;
1220 cp = STRCHR(match_chars, evp->e_c);
1221 if (cp != NULL && (cp - match_chars) & 1)
1225 * Historically, vi eliminated nul's out of hand. If the
1226 * beautify option was set, it also deleted any unknown
1227 * ASCII value less than space (040) and the del character
1228 * (0177), except for tabs. Unknown is a key word here.
1229 * Most vi documentation claims that it deleted everything
1230 * but <tab>, <nl> and <ff>, as that's what the original
1231 * 4BSD documentation said. This is obviously wrong,
1232 * however, as <esc> would be included in that list. What
1233 * we do is eliminate any unquoted, iscntrl() character that
1234 * wasn't a replay and wasn't handled specially, except
1237 if (LF_ISSET(TXT_BEAUTIFY) && ISCNTRL(evp->e_c) &&
1238 evp->e_value != K_FORMFEED && evp->e_value != K_TAB) {
1240 "192|Illegal character; quote to enter");
1241 if (LF_ISSET(TXT_REPLAY))
1247 * If entering a non-word character after a word, check for
1248 * abbreviations. If there was one, discard replay characters.
1249 * If entering a blank character, check for unmap commands,
1252 if (!inword(evp->e_c)) {
1253 if (abb == AB_INWORD &&
1254 !LF_ISSET(TXT_REPLAY) && F_ISSET(gp, G_ABBREV)) {
1255 if (txt_abbrev(sp, tp, &evp->e_c,
1256 LF_ISSET(TXT_INFOLINE), &tmp, &ab_turnoff))
1259 if (LF_ISSET(TXT_RECORD))
1264 if (isblank(evp->e_c) && UNMAP_TST)
1265 txt_unmap(sp, tp, &ec_flags);
1267 if (abb != AB_NOTSET)
1268 abb = inword(evp->e_c) ? AB_INWORD : AB_NOTWORD;
1270 insl_ch: if (txt_insch(sp, tp, &evp->e_c, flags))
1274 * If we're using K_VLNEXT to quote the next character, then
1275 * we want the cursor to position itself on the ^ placeholder
1276 * we're displaying, to match historic practice.
1278 if (quote == Q_VNEXT) {
1285 * Translate "<CH_HEX>[isxdigit()]*" to a character with
1286 * a hex value: this test delimits the value by the max
1287 * number of hex bytes. Offset by one, we use 0 to mean
1288 * that we've found <CH_HEX>.
1290 if (hexcnt != 0 && hexcnt++ == 3) {
1292 if (txt_hex(sp, tp))
1297 * Check to see if we've crossed the margin.
1300 * In the historic vi, the wrapmargin value was figured out
1301 * using the display widths of the characters, i.e. <tab>
1302 * characters were counted as two characters if the list edit
1303 * option is set, but as the tabstop edit option number of
1304 * characters otherwise. That's what the vs_column() function
1305 * gives us, so we use it.
1308 if (vs_column(sp, &tcol))
1310 if (tcol >= margin) {
1311 if (txt_margin(sp, tp, &wmt, &tmp, flags))
1314 if (isblank(evp->e_c))
1323 * If we've reached the end of the buffer, then we need to
1324 * switch into insert mode. This happens when there's a
1325 * change to a mark and the user puts in more characters than
1326 * the length of the motion.
1328 ebuf_chk: if (tp->cno >= tp->len) {
1329 BINC_GOTOW(sp, tp->lb, tp->lb_len, tp->len + 1);
1330 LF_SET(TXT_APPENDEOL);
1332 tp->lb[tp->cno] = CH_CURSOR;
1337 /* Step the quote state forward. */
1338 if (quote == Q_VNEXT)
1344 if (tp->cno + tp->insert + tp->owrite != tp->len) {
1346 "len %zu != cno: %zu ai: %zu insert %zu overwrite %zu",
1347 tp->len, tp->cno, tp->ai, tp->insert, tp->owrite);
1348 if (LF_ISSET(TXT_REPLAY))
1350 tp->len = tp->cno + tp->insert + tp->owrite;
1355 * 1: If we don't need to know where the cursor really is and we're
1356 * replaying text, keep going.
1358 if (margin == 0 && LF_ISSET(TXT_REPLAY))
1362 * 2: Reset the line. Don't bother unless we're about to wait on
1363 * a character or we need to know where the cursor really is.
1364 * We have to do this before showing matching characters so the
1365 * user can see what they're matching.
1367 if ((margin != 0 || !KEYS_WAITING(sp)) &&
1368 vs_change(sp, tp->lno, LINE_RESET))
1372 * 3: If there aren't keys waiting, display the matching character.
1373 * We have to do this before resolving any messages, otherwise
1374 * the error message from a missing match won't appear correctly.
1377 if (!KEYS_WAITING(sp) && txt_showmatch(sp, tp))
1383 * 4: If there have been messages and we're not editing on the colon
1384 * command line or doing file name completion, resolve them.
1386 if ((vip->totalcount != 0 || F_ISSET(gp, G_BELLSCHED)) &&
1387 !F_ISSET(sp, SC_TINPUT_INFO) && !filec_redraw &&
1388 vs_resolve(sp, NULL, 0))
1392 * 5: Refresh the screen if we're about to wait on a character or we
1393 * need to know where the cursor really is.
1395 if (margin != 0 || !KEYS_WAITING(sp)) {
1396 UPDATE_POSITION(sp, tp);
1397 if (vs_refresh(sp, margin != 0))
1401 /* 6: Proceed with the incremental search. */
1402 if (FL_ISSET(is_flags, IS_RUNNING) && txt_isrch(sp, vp, tp, &is_flags))
1405 /* 7: Next character... */
1406 if (LF_ISSET(TXT_REPLAY))
1410 done: /* Leave input mode. */
1411 F_CLR(sp, SC_TINPUT);
1413 /* If recording for playback, save it. */
1414 if (LF_ISSET(TXT_RECORD))
1415 vip->rep_cnt = rcol;
1418 * If not working on the colon command line, set the final cursor
1421 if (!F_ISSET(sp, SC_TINPUT_INFO)) {
1422 vp->m_final.lno = tp->lno;
1423 vp->m_final.cno = tp->cno;
1429 F_CLR(sp, SC_TINPUT);
1430 txt_err(sp, sp->tiq);
1436 * Handle abbreviations.
1439 txt_abbrev(SCR *sp, TEXT *tp, CHAR_T *pushcp, int isinfoline, int *didsubp, int *turnoffp)
1446 /* Check to make sure we're not at the start of an append. */
1448 if (tp->cno == tp->offset)
1454 * Find the start of the "word".
1457 * We match historic practice, which, as far as I can tell, had an
1458 * off-by-one error. The way this worked was that when the inserted
1459 * text switched from a "word" character to a non-word character,
1460 * vi would check for possible abbreviations. It would then take the
1461 * type (i.e. word/non-word) of the character entered TWO characters
1462 * ago, and move backward in the text until reaching a character that
1463 * was not that type, or the beginning of the insert, the line, or
1464 * the file. For example, in the string "abc<space>", when the <space>
1465 * character triggered the abbreviation check, the type of the 'b'
1466 * character was used for moving through the string. Maybe there's a
1467 * reason for not using the first (i.e. 'c') character, but I can't
1470 * Terminate at the beginning of the insert or the character after the
1471 * offset character -- both can be tested for using tp->offset.
1473 off = tp->cno - 1; /* Previous character. */
1475 len = 1; /* One character test. */
1476 if (off == tp->offset || isblank(p[-1]))
1478 if (inword(p[-1])) /* Move backward to change. */
1481 if (off == tp->offset || !inword(p[-1]))
1487 if (off == tp->offset ||
1488 inword(p[-1]) || isblank(p[-1]))
1494 * Historic vi exploded abbreviations on the command line. This has
1495 * obvious problems in that unabbreviating the string can be extremely
1496 * tricky, particularly if the string has, say, an embedded escape
1497 * character. Personally, I think it's a stunningly bad idea. Other
1498 * examples of problems this caused in historic vi are:
1501 * results in "bar" being abbreviated to "baz", which wasn't what the
1502 * user had in mind at all. Also, the commands:
1505 * resulted in an error message that "bar" wasn't mapped. Finally,
1506 * since the string was already exploded by the time the unabbreviate
1507 * command got it, all it knew was that an abbreviation had occurred.
1508 * Cleverly, it checked the replacement string for its unabbreviation
1509 * match, which meant that the commands:
1513 * unabbreviate "foo1", and the commands:
1516 * unabbreviate "foo"!
1518 * Anyway, people neglected to first ask my opinion before they wrote
1519 * macros that depend on this stuff, so, we make this work as follows.
1520 * When checking for an abbreviation on the command line, if we get a
1521 * string which is <blank> terminated and which starts at the beginning
1522 * of the line, we check to see it is the abbreviate or unabbreviate
1523 * commands. If it is, turn abbreviations off and return as if no
1524 * abbreviation was found. Note also, minor trickiness, so that if
1525 * the user erases the line and starts another command, we turn the
1526 * abbreviations back on.
1528 * This makes the layering look like a Nachos Supreme.
1530 search: if (isinfoline)
1531 if (off == tp->ai || off == tp->offset)
1532 if (ex_is_abbrev(p, len)) {
1541 /* Check for any abbreviations. */
1542 if ((qp = seq_find(sp, NULL, NULL, p, len, SEQ_ABBREV, NULL)) == NULL)
1546 * Push the abbreviation onto the tty stack. Historically, characters
1547 * resulting from an abbreviation expansion were themselves subject to
1548 * map expansions, O_SHOWMATCH matching etc. This means the expanded
1549 * characters will be re-tested for abbreviations. It's difficult to
1550 * know what historic practice in this case was, since abbreviations
1551 * were applied to :colon command lines, so entering abbreviations that
1552 * looped was tricky, although possible. In addition, obvious loops
1553 * didn't work as expected. (The command ':ab a b|ab b c|ab c a' will
1554 * silently only implement and/or display the last abbreviation.)
1556 * This implementation doesn't recover well from such abbreviations.
1557 * The main input loop counts abbreviated characters, and, when it
1558 * reaches a limit, discards any abbreviated characters on the queue.
1559 * It's difficult to back up to the original position, as the replay
1560 * queue would have to be adjusted, and the line state when an initial
1561 * abbreviated character was received would have to be saved.
1564 if (v_event_push(sp, NULL, &ch, 1, CH_ABBREVIATED))
1566 if (v_event_push(sp, NULL, qp->output, qp->olen, CH_ABBREVIATED))
1570 * If the size of the abbreviation is larger than or equal to the size
1571 * of the original text, move to the start of the replaced characters,
1572 * and add their length to the overwrite count.
1574 * If the abbreviation is smaller than the original text, we have to
1575 * delete the additional overwrite characters and copy down any insert
1579 if (qp->olen >= len)
1583 MEMMOVE(tp->lb + tp->cno + qp->olen,
1584 tp->lb + tp->cno + tp->owrite + len, tp->insert);
1585 tp->owrite += qp->olen;
1586 tp->len -= len - qp->olen;
1590 * We return the length of the abbreviated characters. This is so
1591 * the calling routine can replace the replay characters with the
1592 * abbreviation. This means that subsequent '.' commands will produce
1593 * the same text, regardless of intervening :[un]abbreviate commands.
1594 * This is historic practice.
1602 * Handle the unmap command.
1605 txt_unmap(SCR *sp, TEXT *tp, u_int32_t *ec_flagsp)
1610 /* Find the beginning of this "word". */
1611 for (off = tp->cno - 1, p = tp->lb + off, len = 0;; --p, --off) {
1617 if (off == tp->ai || off == tp->offset)
1623 * Historic vi exploded input mappings on the command line. See the
1624 * txt_abbrev() routine for an explanation of the problems inherent
1627 * We make this work as follows. If we get a string which is <blank>
1628 * terminated and which starts at the beginning of the line, we check
1629 * to see it is the unmap command. If it is, we return that the input
1630 * mapping should be turned off. Note also, minor trickiness, so that
1631 * if the user erases the line and starts another command, we go ahead
1632 * an turn mapping back on.
1634 if ((off == tp->ai || off == tp->offset) && ex_is_unmap(p, len))
1635 FL_CLR(*ec_flagsp, EC_MAPINPUT);
1637 FL_SET(*ec_flagsp, EC_MAPINPUT);
1642 * When a line is resolved by <esc>, review autoindent characters.
1645 txt_ai_resolve(SCR *sp, TEXT *tp, int *changedp)
1649 size_t cno, len, new, old, scno, spaces, tab_after_sp, tabs;
1655 * If the line is empty, has an offset, or no autoindent
1656 * characters, we're done.
1658 if (!tp->len || tp->offset || !tp->ai)
1662 * If the length is less than or equal to the autoindent
1663 * characters, delete them.
1665 if (tp->len <= tp->ai) {
1666 tp->ai = tp->cno = tp->len = 0;
1671 * The autoindent characters plus any leading <blank> characters
1672 * in the line are resolved into the minimum number of characters.
1673 * Historic practice.
1675 ts = O_VAL(sp, O_TABSTOP);
1677 /* Figure out the last <blank> screen column. */
1678 for (p = tp->lb, scno = 0, len = tp->len,
1679 spaces = tab_after_sp = 0; len-- && isblank(*p); ++p)
1683 scno += COL_OFF(scno, ts);
1690 * If there are no spaces, or no tabs after spaces and less than
1691 * ts spaces, it's already minimal.
1692 * Keep analysing if expandtab is set.
1694 if ((!spaces || (!tab_after_sp && spaces < ts)) &&
1695 !O_ISSET(sp, O_EXPANDTAB))
1698 /* Count up spaces/tabs needed to get to the target. */
1701 if (!O_ISSET(sp, O_EXPANDTAB)) {
1702 for (; cno + COL_OFF(cno, ts) <= scno; ++tabs)
1703 cno += COL_OFF(cno, ts);
1705 spaces = scno - cno;
1708 * Figure out how many characters we're dropping -- if we're not
1709 * dropping any, it's already minimal, we're done.
1712 new = spaces + tabs;
1716 /* Shift the rest of the characters down, adjust the counts. */
1718 MEMMOVE(p - del, p, tp->len - old);
1722 /* Fill in space/tab characters. */
1723 for (p = tp->lb; tabs--;)
1732 * Handle autoindent. If aitp isn't NULL, use it, otherwise,
1733 * retrieve the line.
1735 * PUBLIC: int v_txt_auto(SCR *, recno_t, TEXT *, size_t, TEXT *);
1738 v_txt_auto(SCR *sp, recno_t lno, TEXT *aitp, size_t len, TEXT *tp)
1745 * If the ex append command is executed with an address of 0,
1746 * it's possible to get here with a line number of 0. Return
1753 if (db_get(sp, lno, DBG_FATAL, &t, &len))
1758 /* Count whitespace characters. */
1759 for (p = t; len > 0; ++p, --len)
1763 /* Set count, check for no indentation. */
1764 if ((nlen = (p - t)) == 0)
1767 /* Make sure the buffer's big enough. */
1768 BINC_RETW(sp, tp->lb, tp->lb_len, tp->len + nlen);
1770 /* Copy the buffer's current contents up. */
1772 MEMMOVE(tp->lb + nlen, tp->lb, tp->len);
1775 /* Copy the indentation into the new buffer. */
1776 MEMMOVE(tp->lb, t, nlen);
1778 /* Set the autoindent count. */
1785 * Back up to the previously edited line.
1788 txt_backup(SCR *sp, TEXTH *tiqh, TEXT *tp, u_int32_t *flagsp)
1793 /* Get a handle on the previous TEXT structure. */
1794 if ((ntp = TAILQ_PREV(tp, _texth, q)) == NULL) {
1795 if (!FL_ISSET(*flagsp, TXT_REPLAY))
1797 "193|Already at the beginning of the insert");
1802 ntp->len = ntp->sv_len;
1804 /* Handle appending to the line. */
1806 if (ntp->owrite == 0 && ntp->insert == 0) {
1807 ntp->lb[ntp->len] = CH_CURSOR;
1810 FL_SET(*flagsp, TXT_APPENDEOL);
1812 FL_CLR(*flagsp, TXT_APPENDEOL);
1814 /* Release the current TEXT. */
1815 TAILQ_REMOVE(tiqh, tp, q);
1818 /* Update the old line on the screen. */
1819 if (vs_change(sp, ntp->lno + 1, LINE_DELETE))
1822 /* Return the new/current TEXT. */
1827 * Text indentation is truly strange. ^T and ^D do movements to the next or
1828 * previous shiftwidth value, i.e. for a 1-based numbering, with shiftwidth=3,
1829 * ^T moves a cursor on the 7th, 8th or 9th column to the 10th column, and ^D
1833 * The ^T and ^D characters in historical vi had special meaning only when they
1834 * were the first characters entered after entering text input mode. As normal
1835 * erase characters couldn't erase autoindent characters (^T in this case), it
1836 * meant that inserting text into previously existing text was strange -- ^T
1837 * only worked if it was the first keystroke(s), and then could only be erased
1838 * using ^D. This implementation treats ^T specially anywhere it occurs in the
1839 * input, and permits the standard erase characters to erase the characters it
1843 * A fun test is to try:
1845 * i<CR>^Tx<CR>^Tx<CR>^Tx<CR>^Dx<CR>^Dx<CR>^Dx<esc>
1846 * Historic vi loses some of the '$' marks on the line ends, but otherwise gets
1850 * Technically, txt_dent should be part of the screen interface, as it requires
1851 * knowledge of character sizes, including <space>s, on the screen. It's here
1852 * because it's a complicated little beast, and I didn't want to shove it down
1853 * into the screen. It's probable that KEY_COL will call into the screen once
1854 * there are screens with different character representations.
1857 * Handle ^T indents, ^D outdents.
1859 * If anything changes here, check the ex version to see if it needs similar
1863 txt_dent(SCR *sp, TEXT *tp, int swopt, int isindent)
1867 size_t cno, current, spaces, target, tabs;
1870 ts = O_VAL(sp, O_TABSTOP);
1871 sw = O_VAL(sp, swopt);
1874 * Since we don't know what precedes the character(s) being inserted
1875 * (or deleted), the preceding whitespace characters must be resolved.
1876 * An example is a <tab>, which doesn't need a full shiftwidth number
1877 * of columns because it's preceded by <space>s. This is easy to get
1878 * if the user sets shiftwidth to a value less than tabstop (or worse,
1879 * something for which tabstop isn't a multiple) and then uses ^T to
1880 * indent, and ^D to outdent.
1882 * Figure out the current and target screen columns. In the historic
1883 * vi, the autoindent column was NOT determined using display widths
1884 * of characters as was the wrapmargin column. For that reason, we
1885 * can't use the vs_column() function, but have to calculate it here.
1886 * This is slow, but it's normally only on the first few characters of
1889 for (current = cno = 0; cno < tp->cno; ++cno)
1890 current += tp->lb[cno] == '\t' ?
1891 COL_OFF(current, ts) : KEY_COL(sp, tp->lb[cno]);
1895 target += COL_OFF(target, sw);
1898 target -= target % sw;
1902 * The AI characters will be turned into overwrite characters if the
1903 * cursor immediately follows them. We test both the cursor position
1904 * and the indent flag because there's no single test. (^T can only
1905 * be detected by the cursor position, and while we know that the test
1906 * is always true for ^D, the cursor can be in more than one place, as
1907 * "0^D" and "^D" are different.)
1909 ai_reset = !isindent || tp->cno == tp->ai + tp->offset;
1912 * Back up over any previous <blank> characters, changing them into
1913 * overwrite characters (including any ai characters). Then figure
1914 * out the current screen column.
1916 for (; tp->cno > tp->offset &&
1917 (tp->lb[tp->cno - 1] == ' ' || tp->lb[tp->cno - 1] == '\t');
1918 --tp->cno, ++tp->owrite);
1919 for (current = cno = 0; cno < tp->cno; ++cno)
1920 current += tp->lb[cno] == '\t' ?
1921 COL_OFF(current, ts) : KEY_COL(sp, tp->lb[cno]);
1924 * If we didn't move up to or past the target, it's because there
1925 * weren't enough characters to delete, e.g. the first character
1926 * of the line was a tp->offset character, and the user entered
1927 * ^D to move to the beginning of a line. An example of this is:
1929 * :set ai sw=4<cr>i<space>a<esc>i^T^D
1931 * Otherwise, count up the total spaces/tabs needed to get from the
1932 * beginning of the line (or the last non-<blank> character) to the
1935 if (current >= target)
1940 if (!O_ISSET(sp, O_EXPANDTAB)) {
1941 for (; cno + COL_OFF(cno, ts) <= target; ++tabs)
1942 cno += COL_OFF(cno, ts);
1944 spaces = target - cno;
1947 /* If we overwrote ai characters, reset the ai count. */
1949 tp->ai = tabs + spaces;
1952 * Call txt_insch() to insert each character, so that we get the
1953 * correct effect when we add a <tab> to replace N <spaces>.
1955 for (ch = '\t'; tabs > 0; --tabs)
1956 (void)txt_insch(sp, tp, &ch, 0);
1957 for (ch = ' '; spaces > 0; --spaces)
1958 (void)txt_insch(sp, tp, &ch, 0);
1964 * File name and ex command completion.
1967 txt_fc(SCR *sp, TEXT *tp, int *redrawp)
1972 size_t indx, len, nlen, off;
1975 char *np, *epd = NULL;
1980 ex_cinit(sp, &cmd, 0, 0, OOBLNO, OOBLNO, 0);
1983 * Find the beginning of this "word" -- if we're at the beginning
1984 * of the line, it's a special case.
1993 off = MAX(tp->ai, tp->offset), ap = tp->lb + off, p = ap;
1994 off < tp->cno; ++off, ++ap) {
1995 if (IS_ESCAPE(sp, &cmd, *ap)) {
1996 if (++off == tp->cno)
2000 } else if (cmdskip(*ap)) {
2011 * If we are at the first word, do ex command completion instead of
2012 * file name completion.
2015 (void)argv_flt_ex(sp, &cmd, p, len);
2017 if ((bp = argv_uesc(sp, &cmd, p, len)) == NULL)
2019 if (argv_flt_path(sp, &cmd, bp, STRLEN(bp))) {
2020 FREE_SPACEW(sp, bp, 0);
2023 FREE_SPACEW(sp, bp, 0);
2029 case 0: /* No matches. */
2030 (void)sp->gp->scr_bell(sp);
2032 case 1: /* One match. */
2033 /* Always overwrite the old text. */
2034 nlen = STRLEN(cmd.argv[0]->bp);
2036 default: /* Multiple matches. */
2038 if (txt_fc_col(sp, argc, argv))
2041 /* Find the length of the shortest match. */
2042 for (nlen = cmd.argv[0]->len; --argc > 0;) {
2043 if (cmd.argv[argc]->len < nlen)
2044 nlen = cmd.argv[argc]->len;
2045 for (indx = 0; indx < nlen &&
2046 cmd.argv[argc]->bp[indx] == cmd.argv[0]->bp[indx];
2053 /* Escape the matched part of the path. */
2055 bp = cmd.argv[0]->bp;
2057 if ((bp = argv_esc(sp, &cmd, cmd.argv[0]->bp, nlen)) == NULL)
2062 /* Overwrite the expanded text first. */
2063 for (t = bp; len > 0 && nlen > 0; --len, --nlen)
2066 /* If lost text, make the remaining old text overwrite characters. */
2072 /* Overwrite any overwrite characters next. */
2073 for (; nlen > 0 && tp->owrite > 0; --nlen, --tp->owrite, ++tp->cno)
2076 /* Shift remaining text up, and move the cursor to the end. */
2079 BINC_RETW(sp, tp->lb, tp->lb_len, tp->len + nlen);
2085 if (tp->insert != 0)
2086 (void)MEMMOVE(p + nlen, p, tp->insert);
2092 FREE_SPACEW(sp, bp, 0);
2094 /* If not a single match of path, we've done. */
2095 if (argc != 1 || fstwd)
2098 /* If a single match and it's a directory, append a '/'. */
2099 INT2CHAR(sp, cmd.argv[0]->bp, cmd.argv[0]->len + 1, np, nplen);
2100 if ((epd = expanduser(np)) != NULL)
2102 if (!stat(np, &sb) && S_ISDIR(sb.st_mode)) {
2103 if (tp->owrite == 0) {
2105 BINC_RETW(sp, tp->lb, tp->lb_len, tp->len + 1);
2107 if (tp->insert != 0)
2108 (void)MEMMOVE(p + 1, p, tp->insert);
2122 * Display file names for file name completion.
2125 txt_fc_col(SCR *sp, int argc, ARGS **argv)
2130 size_t base, cnt, col, colwidth, numrows, numcols, prefix, row;
2137 /* Trim any directory prefix common to all of the files. */
2138 INT2CHAR(sp, argv[0]->bp, argv[0]->len + 1, np, nlen);
2139 if ((pp = strrchr(np, '/')) == NULL)
2142 prefix = (pp - np) + 1;
2143 for (ac = argc - 1, av = argv + 1; ac > 0; --ac, ++av)
2144 if (av[0]->len < prefix ||
2145 MEMCMP(av[0]->bp, argv[0]->bp,
2153 * Figure out the column width for the longest name. Output is done on
2154 * 6 character "tab" boundaries for no particular reason. (Since we
2155 * don't output tab characters, we ignore the terminal's tab settings.)
2156 * Ignore the user's tab setting because we have no idea how reasonable
2159 for (ac = argc, av = argv, colwidth = 0; ac > 0; --ac, ++av) {
2160 for (col = 0, p = av[0]->bp + prefix; *p != '\0'; ++p)
2161 col += KEY_COL(sp, *p);
2165 colwidth += COL_OFF(colwidth, 6);
2168 * Writing to the bottom line of the screen is always turned off when
2169 * SC_TINPUT_INFO is set. Turn it back on, we know what we're doing.
2171 if (F_ISSET(sp, SC_TINPUT_INFO)) {
2173 F_CLR(sp, SC_TINPUT_INFO);
2178 if (F_ISSET(gp, G_INTERRUPTED)) \
2181 /* If the largest file name is too large, just print them. */
2182 if (colwidth >= sp->cols) {
2183 for (ac = argc, av = argv; ac > 0; --ac, ++av) {
2184 INT2CHAR(sp, av[0]->bp+prefix, av[0]->len+1-prefix,
2186 pp = msg_print(sp, np, &nf);
2187 (void)ex_printf(sp, "%s\n", pp);
2189 FREE_SPACE(sp, pp, 0);
2190 if (F_ISSET(gp, G_INTERRUPTED))
2195 /* Figure out the number of columns. */
2196 numcols = (sp->cols - 1) / colwidth;
2197 if (argc > numcols) {
2198 numrows = argc / numcols;
2204 /* Display the files in sorted order. */
2205 for (row = 0; row < numrows; ++row) {
2206 for (base = row, col = 0; col < numcols; ++col) {
2207 INT2CHAR(sp, argv[base]->bp+prefix,
2208 argv[base]->len+1-prefix, np, nlen);
2209 pp = msg_print(sp, np, &nf);
2210 cnt = ex_printf(sp, "%s", pp);
2212 FREE_SPACE(sp, pp, 0);
2214 if ((base += numrows) >= argc)
2217 "%*s", (int)(colwidth - cnt), "");
2220 (void)ex_puts(sp, "\n");
2223 (void)ex_puts(sp, "\n");
2226 (void)ex_fflush(sp);
2229 intr: F_CLR(gp, G_INTERRUPTED);
2232 F_SET(sp, SC_TINPUT_INFO);
2239 * Set the end mark on the line.
2242 txt_emark(SCR *sp, TEXT *tp, size_t cno)
2246 size_t chlen, nlen, olen;
2252 * The end mark may not be the same size as the current character.
2253 * Don't let the line shift.
2255 nlen = KEY_COL(sp, ch);
2256 if (tp->lb[cno] == '\t')
2257 (void)vs_columns(sp, tp->lb, tp->lno, &cno, &olen);
2259 olen = KEY_COL(sp, tp->lb[cno]);
2262 * If the line got longer, well, it's weird, but it's easy. If
2263 * it's the same length, it's easy. If it got shorter, we have
2267 BINC_RETW(sp, tp->lb, tp->lb_len, tp->len + olen);
2268 chlen = olen - nlen;
2269 if (tp->insert != 0)
2270 MEMMOVE(tp->lb + cno + 1 + chlen,
2271 tp->lb + cno + 1, tp->insert);
2274 tp->owrite += chlen;
2276 if (tp->lb[cno] == '\t' ||
2277 KEY_NEEDSWIDE(sp, tp->lb[cno]))
2278 for (cno += chlen; chlen--;)
2281 for (kp = (u_char *)
2282 KEY_NAME(sp, tp->lb[cno]),
2283 cno += chlen; chlen--;)
2287 return (vs_change(sp, tp->lno, LINE_RESET));
2292 * Handle an error during input processing.
2295 txt_err(SCR *sp, TEXTH *tiqh)
2300 * The problem with input processing is that the cursor is at an
2301 * indeterminate position since some input may have been lost due
2302 * to a malloc error. So, try to go back to the place from which
2303 * the cursor started, knowing that it may no longer be available.
2305 * We depend on at least one line number being set in the text
2308 for (lno = TAILQ_FIRST(tiqh)->lno;
2309 !db_exist(sp, lno) && lno > 0; --lno);
2311 sp->lno = lno == 0 ? 1 : lno;
2314 /* Redraw the screen, just in case. */
2315 F_SET(sp, SC_SCR_REDRAW);
2320 * Let the user insert any character value they want.
2323 * This is an extension. The pattern "^X[0-9a-fA-F]*" is a way
2324 * for the user to specify a character value which their keyboard
2325 * may not be able to enter.
2328 txt_hex(SCR *sp, TEXT *tp)
2336 * Null-terminate the string. Since nul isn't a legal hex value,
2337 * this should be okay, and lets us use a local routine, which
2338 * presumably understands the character set, to convert the value.
2340 savec = tp->lb[tp->cno];
2341 tp->lb[tp->cno] = 0;
2343 /* Find the previous CH_HEX character. */
2344 for (off = tp->cno - 1, p = tp->lb + off, len = 0;; --p, --off, ++len) {
2349 /* Not on this line? Shouldn't happen. */
2350 if (off == tp->ai || off == tp->offset)
2354 /* If length of 0, then it wasn't a hex value. */
2358 /* Get the value. */
2360 value = STRTOL(wp, NULL, 16);
2361 if (errno || value > UCHAR_MAX) {
2362 nothex: tp->lb[tp->cno] = savec;
2366 /* Restore the original character. */
2367 tp->lb[tp->cno] = savec;
2369 /* Adjust the bookkeeping. */
2372 tp->lb[tp->cno - 1] = value;
2374 /* Copy down any overwrite characters. */
2376 MEMMOVE(tp->lb + tp->cno, tp->lb + tp->cno + len,
2379 /* Copy down any insert characters. */
2381 MEMMOVE(tp->lb + tp->cno + tp->owrite,
2382 tp->lb + tp->cno + tp->owrite + len,
2392 * Historic vi did a special screen optimization for tab characters. As an
2393 * example, for the keystrokes "iabcd<esc>0C<tab>", the tab overwrote the
2394 * rest of the string when it was displayed.
2396 * Because early versions of this implementation redisplayed the entire line
2397 * on each keystroke, the "bcd" was pushed to the right as it ignored that
2398 * the user had "promised" to change the rest of the characters. However,
2399 * the historic vi implementation had an even worse bug: given the keystrokes
2400 * "iabcd<esc>0R<tab><esc>", the "bcd" disappears, and magically reappears
2401 * on the second <esc> key.
2403 * POSIX 1003.2 requires (will require) that this be fixed, specifying that
2404 * vi overwrite characters the user has committed to changing, on the basis
2405 * of the screen space they require, but that it not overwrite other characters.
2408 txt_insch(SCR *sp, TEXT *tp, CHAR_T *chp, u_int flags)
2412 size_t chlen, cno, copydown, olen, nlen;
2416 * The 'R' command does one-for-one replacement, because there's
2417 * no way to know how many characters the user intends to replace.
2419 if (LF_ISSET(TXT_REPLACE)) {
2422 tp->lb[tp->cno++] = *chp;
2425 } else if (tp->owrite) { /* Overwrite a character. */
2429 * If the old or new characters are tabs, then the length of the
2430 * display depends on the character position in the display. We
2431 * don't even try to handle this here, just ask the screen.
2434 savech = tp->lb[cno];
2436 (void)vs_columns(sp, tp->lb, tp->lno, &cno, &nlen);
2437 tp->lb[cno] = savech;
2439 nlen = KEY_COL(sp, *chp);
2442 * Eat overwrite characters until we run out of them or we've
2443 * handled the length of the new character. If we only eat
2444 * part of an overwrite character, break it into its component
2445 * elements and display the remaining components.
2447 for (copydown = 0; nlen != 0 && tp->owrite != 0;) {
2450 if (tp->lb[cno] == '\t')
2451 (void)vs_columns(sp,
2452 tp->lb, tp->lno, &cno, &olen);
2454 olen = KEY_COL(sp, tp->lb[cno]);
2465 tp->lb, tp->lb_len, tp->len + olen);
2466 chlen = olen - nlen;
2467 MEMMOVE(tp->lb + cno + 1 + chlen,
2469 tp->owrite + tp->insert);
2472 tp->owrite += chlen;
2473 if (tp->lb[cno] == '\t' ||
2474 KEY_NEEDSWIDE(sp, tp->lb[cno]))
2475 for (p = tp->lb + cno + 1; chlen--;)
2478 for (kp = (u_char *)
2479 KEY_NAME(sp, tp->lb[cno]) + nlen,
2480 p = tp->lb + cno + 1; chlen--;)
2488 * If had to erase several characters, we adjust the total
2489 * count, and if there are any characters left, shift them
2492 if (copydown != 0 && (tp->len -= copydown) != 0)
2493 MEMMOVE(tp->lb + cno, tp->lb + cno + copydown,
2494 tp->owrite + tp->insert + copydown);
2496 /* If we had enough overwrite characters, we're done. */
2498 tp->lb[tp->cno++] = *chp;
2503 /* Check to see if the character fits into the input buffer. */
2504 BINC_RETW(sp, tp->lb, tp->lb_len, tp->len + 1);
2507 if (tp->insert) { /* Insert a character. */
2508 if (tp->insert == 1)
2509 tp->lb[tp->cno + 1] = tp->lb[tp->cno];
2511 MEMMOVE(tp->lb + tp->cno + 1,
2512 tp->lb + tp->cno, tp->owrite + tp->insert);
2514 tp->lb[tp->cno++] = *chp;
2520 * Do an incremental search.
2523 txt_isrch(SCR *sp, VICMD *vp, TEXT *tp, u_int8_t *is_flagsp)
2529 /* If it's a one-line screen, we don't do incrementals. */
2530 if (IS_ONELINE(sp)) {
2531 FL_CLR(*is_flagsp, IS_RUNNING);
2536 * If the user erases back to the beginning of the buffer, there's
2537 * nothing to search for. Reset the cursor to the starting point.
2540 vp->m_final = vp->m_start;
2545 * If it's an RE quote character, and not quoted, ignore it until
2546 * we get another character.
2548 if (tp->lb[tp->cno - 1] == '\\' &&
2549 (tp->cno == 2 || tp->lb[tp->cno - 2] != '\\'))
2553 * If it's a magic shell character, and not quoted, reset the cursor
2554 * to the starting point.
2556 if (IS_SHELLMETA(sp, tp->lb[tp->cno - 1]) &&
2557 (tp->cno == 2 || tp->lb[tp->cno - 2] != '\\'))
2558 vp->m_final = vp->m_start;
2561 * If we see the search pattern termination character, then quit doing
2562 * an incremental search. There may be more, e.g., ":/foo/;/bar/",
2563 * and we can't handle that incrementally. Also, reset the cursor to
2564 * the original location, the ex search routines don't know anything
2565 * about incremental searches.
2567 if (tp->lb[0] == tp->lb[tp->cno - 1] &&
2568 (tp->cno == 2 || tp->lb[tp->cno - 2] != '\\')) {
2569 vp->m_final = vp->m_start;
2570 FL_CLR(*is_flagsp, IS_RUNNING);
2575 * Remember the input line and discard the special input map,
2576 * but don't overwrite the input line on the screen.
2579 F_SET(VIP(sp), VIP_S_MODELINE);
2580 F_CLR(sp, SC_TINPUT | SC_TINPUT_INFO);
2581 if (txt_map_end(sp))
2585 * Specify a starting point and search. If we find a match, move to
2586 * it and refresh the screen. If we didn't find the match, then we
2587 * beep the screen. When searching from the original cursor position,
2588 * we have to move the cursor, otherwise, we don't want to move the
2589 * cursor in case the text at the current position continues to match.
2591 if (FL_ISSET(*is_flagsp, IS_RESTART)) {
2592 start = vp->m_start;
2595 start = vp->m_final;
2596 sf = SEARCH_INCR | SEARCH_SET;
2599 if (tp->lb[0] == '/' ?
2601 &start, &vp->m_final, tp->lb + 1, tp->cno - 1, NULL, sf) :
2603 &start, &vp->m_final, tp->lb + 1, tp->cno - 1, NULL, sf)) {
2604 sp->lno = vp->m_final.lno;
2605 sp->cno = vp->m_final.cno;
2606 FL_CLR(*is_flagsp, IS_RESTART);
2608 if (!KEYS_WAITING(sp) && vs_refresh(sp, 0))
2611 FL_SET(*is_flagsp, IS_RESTART);
2613 /* Reinstantiate the special input map. */
2614 if (txt_map_init(sp))
2616 F_CLR(VIP(sp), VIP_S_MODELINE);
2617 F_SET(sp, SC_TINPUT | SC_TINPUT_INFO);
2619 /* Reset the line number of the input line. */
2620 tp->lno = TMAP[0].lno;
2623 * If the colon command-line moved, i.e. the screen scrolled,
2624 * refresh the input line.
2627 * We shouldn't be calling vs_line, here -- we need dirty bits
2628 * on entries in the SMAP array.
2630 if (lno != TMAP[0].lno) {
2631 if (vs_line(sp, &TMAP[0], NULL, NULL))
2633 (void)sp->gp->scr_refresh(sp, 0);
2640 * Resolve the input text chain into the file.
2643 txt_resolve(SCR *sp, TEXTH *tiqh, u_int32_t flags)
2651 * The first line replaces a current line, and all subsequent lines
2652 * are appended into the file. Resolve autoindented characters for
2653 * each line before committing it. If the latter causes the line to
2654 * change, we have to redisplay it, otherwise the information cached
2655 * about the line will be wrong.
2658 tp = TAILQ_FIRST(tiqh);
2660 if (LF_ISSET(TXT_AUTOINDENT))
2661 txt_ai_resolve(sp, tp, &changed);
2664 if (db_set(sp, tp->lno, tp->lb, tp->len) ||
2665 (changed && vs_change(sp, tp->lno, LINE_RESET)))
2668 for (lno = tp->lno; (tp = TAILQ_NEXT(tp, q)) != NULL; ++lno) {
2669 if (LF_ISSET(TXT_AUTOINDENT))
2670 txt_ai_resolve(sp, tp, &changed);
2673 if (db_append(sp, 0, lno, tp->lb, tp->len) ||
2674 (changed && vs_change(sp, tp->lno, LINE_RESET)))
2679 * Clear the input flag, the look-aside buffer is no longer valid.
2680 * Has to be done as part of text resolution, or upon return we'll
2681 * be looking at incorrect data.
2683 F_CLR(sp, SC_TINPUT);
2690 * Show a character match.
2693 * Historic vi tried to display matches even in the :colon command line.
2697 txt_showmatch(SCR *sp, TEXT *tp)
2702 int cnt, endc, startc;
2707 * Do a refresh first, in case we haven't done one in awhile,
2708 * so the user can see what we're complaining about.
2710 UPDATE_POSITION(sp, tp);
2711 if (vs_refresh(sp, 1))
2715 * We don't display the match if it's not on the screen. Find
2716 * out what the first character on the screen is.
2718 if (vs_sm_position(sp, &m, 0, P_TOP))
2721 /* Initialize the getc() interface. */
2722 cs.cs_lno = tp->lno;
2723 cs.cs_cno = tp->cno - 1;
2724 if (cs_init(sp, &cs))
2726 startc = STRCHR(VIP(sp)->mcs, endc = cs.cs_ch)[-1];
2728 /* Search for the match. */
2730 if (cs_prev(sp, &cs))
2732 if (cs.cs_flags != 0) {
2733 if (cs.cs_flags == CS_EOF || cs.cs_flags == CS_SOF) {
2735 "Unmatched %s", KEY_NAME(sp, endc));
2740 if (cs.cs_ch == endc)
2742 else if (cs.cs_ch == startc && --cnt == 0)
2746 /* If the match is on the screen, move to it. */
2747 if (cs.cs_lno < m.lno || (cs.cs_lno == m.lno && cs.cs_cno < m.cno))
2749 sp->lno = cs.cs_lno;
2750 sp->cno = cs.cs_cno;
2751 if (vs_refresh(sp, 1))
2754 /* Wait for timeout or character arrival. */
2755 return (v_event_get(sp,
2756 NULL, O_VAL(sp, O_MATCHTIME) * 100, EC_TIMEOUT));
2761 * Handle margin wrap.
2764 txt_margin(SCR *sp, TEXT *tp, TEXT *wmtp, int *didbreak, u_int32_t flags)
2770 /* Find the nearest previous blank. */
2771 for (off = tp->cno - 1, p = tp->lb + off, len = 0;; --off, --p, ++len) {
2778 * If reach the start of the line, there's nowhere to break.
2781 * Historic vi belled each time a character was entered after
2782 * crossing the margin until a space was entered which could
2783 * be used to break the line. I don't as it tends to wake the
2786 if (off == tp->ai || off == tp->offset) {
2793 * Store saved information about the rest of the line in the
2794 * wrapmargin TEXT structure.
2797 * The offset field holds the length of the current characters
2798 * that the user entered, but which are getting split to the new
2799 * line -- it's going to be used to set the cursor value when we
2800 * move to the new line.
2805 wmtp->insert = LF_ISSET(TXT_APPENDEOL) ? tp->insert - 1 : tp->insert;
2806 wmtp->owrite = tp->owrite;
2808 /* Correct current bookkeeping information. */
2810 if (LF_ISSET(TXT_APPENDEOL)) {
2811 tp->len -= len + tp->owrite + (tp->insert - 1);
2814 tp->len -= len + tp->owrite + tp->insert;
2821 * Delete any trailing whitespace from the current line.
2823 for (;; --p, --off) {
2828 if (off == tp->ai || off == tp->offset)
2837 * Resolve the input line for the 'R' command.
2840 txt_Rresolve(SCR *sp, TEXTH *tiqh, TEXT *tp, const size_t orig_len)
2843 size_t input_len, retain;
2847 * Check to make sure that the cursor hasn't moved beyond
2848 * the end of the line.
2850 if (tp->owrite == 0)
2854 * Calculate how many characters the user has entered,
2855 * plus the blanks erased by <carriage-return>/<newline>s.
2857 for (ttp = TAILQ_FIRST(tiqh), input_len = 0;;) {
2858 input_len += ttp == tp ? tp->cno : ttp->len + ttp->R_erase;
2859 if ((ttp = TAILQ_NEXT(ttp, q)) == NULL)
2864 * If the user has entered less characters than the original line
2865 * was long, restore any overwriteable characters to the original
2866 * characters. These characters are entered as "insert characters",
2867 * because they're after the cursor and we don't want to lose them.
2868 * (This is okay because the R command has no insert characters.)
2869 * We set owrite to 0 so that the insert characters don't get copied
2870 * to somewhere else, which means that the line and the length have
2871 * to be adjusted here as well.
2873 * We have to retrieve the original line because the original pinned
2874 * page has long since been discarded. If it doesn't exist, that's
2875 * okay, the user just extended the file.
2877 if (input_len < orig_len) {
2878 retain = MIN(tp->owrite, orig_len - input_len);
2880 TAILQ_FIRST(tiqh)->lno, DBG_FATAL | DBG_NOCACHE, &p, NULL))
2882 MEMCPY(tp->lb + tp->cno, p + input_len, retain);
2883 tp->len -= tp->owrite - retain;
2885 tp->insert += retain;
2891 * No more characters message.
2894 txt_nomorech(SCR *sp)
2896 msgq(sp, M_BERR, "194|No more characters to erase");