1 /* $NetBSD: v_txt.c,v 1.4 2014/01/26 21:43:45 christos Exp $ */
2 /*-
3 * Copyright (c) 1993, 1994
4 * The Regents of the University of California. All rights reserved.
5 * Copyright (c) 1992, 1993, 1994, 1995, 1996
6 * Keith Bostic. All rights reserved.
7 *
8 * See the LICENSE file for redistribution information.
9 */
10
11 #include "config.h"
12
13 #include <sys/cdefs.h>
14 #if 0
15 #ifndef lint
16 static const char sccsid[] = "Id: v_txt.c,v 10.108 2003/07/18 21:27:42 skimo Exp (Berkeley) Date: 2003/07/18 21:27:42 ";
17 #endif /* not lint */
18 #else
19 __RCSID("$NetBSD: v_txt.c,v 1.4 2014/01/26 21:43:45 christos Exp $");
20 #endif
21
22 #include <sys/types.h>
23 #include <sys/queue.h>
24 #include <sys/stat.h>
25 #include <sys/time.h>
26
27 #include <bitstring.h>
28 #include <ctype.h>
29 #include <errno.h>
30 #include <limits.h>
31 #include <stdio.h>
32 #include <stdlib.h>
33 #include <string.h>
34 #include <unistd.h>
35
36 #include "../common/common.h"
37 #include "vi.h"
38
39 static int txt_abbrev __P((SCR *, TEXT *, ARG_CHAR_T *, int, int *, int *));
40 static void txt_ai_resolve __P((SCR *, TEXT *, int *));
41 static TEXT *txt_backup __P((SCR *, TEXTH *, TEXT *, u_int32_t *));
42 static int txt_dent __P((SCR *, TEXT *, int));
43 static int txt_emark __P((SCR *, TEXT *, size_t));
44 static void txt_err __P((SCR *, TEXTH *));
45 static int txt_fc __P((SCR *, TEXT *, int *));
46 static int txt_fc_col __P((SCR *, int, ARGS **));
47 static int txt_hex __P((SCR *, TEXT *));
48 static int txt_insch __P((SCR *, TEXT *, ARG_CHAR_T *, u_int));
49 static int txt_isrch __P((SCR *, VICMD *, TEXT *, u_int8_t *));
50 static int txt_map_end __P((SCR *));
51 static int txt_map_init __P((SCR *));
52 static int txt_margin __P((SCR *, TEXT *, TEXT *, int *, u_int32_t));
53 static void txt_nomorech __P((SCR *));
54 static void txt_Rresolve __P((SCR *, TEXTH *, TEXT *, const size_t));
55 static int txt_resolve __P((SCR *, TEXTH *, u_int32_t));
56 static int txt_showmatch __P((SCR *, TEXT *));
57 static void txt_unmap __P((SCR *, TEXT *, u_int32_t *));
58
59 /* Cursor character (space is hard to track on the screen). */
60 #if defined(DEBUG) && 0
61 #undef CH_CURSOR
62 #define CH_CURSOR '+'
63 #endif
64
65 /*
66 * v_tcmd --
67 * Fill a buffer from the terminal for vi.
68 *
69 * PUBLIC: int v_tcmd __P((SCR *, VICMD *, ARG_CHAR_T, u_int));
70 */
71 int
v_tcmd(SCR * sp,VICMD * vp,ARG_CHAR_T prompt,u_int flags)72 v_tcmd(SCR *sp, VICMD *vp, ARG_CHAR_T prompt, u_int flags)
73 {
74 /* Normally, we end up where we started. */
75 vp->m_final.lno = sp->lno;
76 vp->m_final.cno = sp->cno;
77
78 /* Initialize the map. */
79 if (txt_map_init(sp))
80 return (1);
81
82 /* Move to the last line. */
83 sp->lno = TMAP[0].lno;
84 sp->cno = 0;
85
86 /* Don't update the modeline for now. */
87 F_SET(sp, SC_TINPUT_INFO);
88
89 /* Set the input flags. */
90 LF_SET(TXT_APPENDEOL |
91 TXT_CR | TXT_ESCAPE | TXT_INFOLINE | TXT_MAPINPUT);
92 if (O_ISSET(sp, O_ALTWERASE))
93 LF_SET(TXT_ALTWERASE);
94 if (O_ISSET(sp, O_TTYWERASE))
95 LF_SET(TXT_TTYWERASE);
96
97 /* Do the input thing. */
98 if (v_txt(sp, vp, NULL, NULL, 0, prompt, 0, 1, flags))
99 return (1);
100
101 /* Reenable the modeline updates. */
102 F_CLR(sp, SC_TINPUT_INFO);
103
104 /* Clean up the map. */
105 if (txt_map_end(sp))
106 return (1);
107
108 if (IS_ONELINE(sp))
109 F_SET(sp, SC_SCR_REDRAW); /* XXX */
110
111 /* Set the cursor to the resulting position. */
112 sp->lno = vp->m_final.lno;
113 sp->cno = vp->m_final.cno;
114
115 return (0);
116 }
117
118 /*
119 * txt_map_init
120 * Initialize the screen map for colon command-line input.
121 */
122 static int
txt_map_init(SCR * sp)123 txt_map_init(SCR *sp)
124 {
125 SMAP *esmp;
126 VI_PRIVATE *vip;
127
128 vip = VIP(sp);
129 if (!IS_ONELINE(sp)) {
130 /*
131 * Fake like the user is doing input on the last line of the
132 * screen. This makes all of the scrolling work correctly,
133 * and allows us the use of the vi text editing routines, not
134 * to mention practically infinite length ex commands.
135 *
136 * Save the current location.
137 */
138 vip->sv_tm_lno = TMAP->lno;
139 vip->sv_tm_soff = TMAP->soff;
140 vip->sv_tm_coff = TMAP->coff;
141 vip->sv_t_maxrows = sp->t_maxrows;
142 vip->sv_t_minrows = sp->t_minrows;
143 vip->sv_t_rows = sp->t_rows;
144
145 /*
146 * If it's a small screen, TMAP may be small for the screen.
147 * Fix it, filling in fake lines as we go.
148 */
149 if (IS_SMALL(sp))
150 for (esmp =
151 HMAP + (sp->t_maxrows - 1); TMAP < esmp; ++TMAP) {
152 TMAP[1].lno = TMAP[0].lno + 1;
153 TMAP[1].coff = HMAP->coff;
154 TMAP[1].soff = 1;
155 }
156
157 /* Build the fake entry. */
158 TMAP[1].lno = TMAP[0].lno + 1;
159 TMAP[1].soff = 1;
160 TMAP[1].coff = 0;
161 SMAP_FLUSH(&TMAP[1]);
162 ++TMAP;
163
164 /* Reset the screen information. */
165 sp->t_rows = sp->t_minrows = ++sp->t_maxrows;
166 }
167 return (0);
168 }
169
170 /*
171 * txt_map_end
172 * Reset the screen map for colon command-line input.
173 */
174 static int
txt_map_end(SCR * sp)175 txt_map_end(SCR *sp)
176 {
177 VI_PRIVATE *vip;
178 size_t cnt;
179
180 vip = VIP(sp);
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;
186
187 /*
188 * If it's a small screen, TMAP may be wrong. Clear any
189 * lines that might have been overwritten.
190 */
191 if (IS_SMALL(sp)) {
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);
195 }
196 TMAP = HMAP + (sp->t_rows - 1);
197 } else
198 --TMAP;
199
200 /*
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.
204 */
205 if (!O_ISSET(sp, O_LEFTRIGHT))
206 while (vip->sv_tm_lno != TMAP->lno ||
207 vip->sv_tm_soff != TMAP->soff)
208 if (vs_sm_1down(sp))
209 return (1);
210 }
211
212 /*
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.
217 */
218 VI_SCR_CFLUSH(vip);
219 F_SET(vip, VIP_CUR_INVALID);
220
221 return (0);
222 }
223
224 /*
225 * If doing input mapping on the colon command line, may need to unmap
226 * based on the command.
227 */
228 #define UNMAP_TST \
229 FL_ISSET(ec_flags, EC_MAPINPUT) && LF_ISSET(TXT_INFOLINE)
230
231 /*
232 * Internally, we maintain tp->lno and tp->cno, externally, everyone uses
233 * sp->lno and sp->cno. Make them consistent as necessary.
234 */
235 #define UPDATE_POSITION(sp, tp) { \
236 (sp)->lno = (tp)->lno; \
237 (sp)->cno = (tp)->cno; \
238 }
239
240 /*
241 * v_txt --
242 * Vi text input.
243 *
244 * PUBLIC: int v_txt __P((SCR *, VICMD *, MARK *,
245 * PUBLIC: const CHAR_T *, size_t, ARG_CHAR_T, db_recno_t, u_long, u_int32_t));
246 */
247 int
v_txt(SCR * sp,VICMD * vp,MARK * tm,const CHAR_T * lp,size_t len,ARG_CHAR_T prompt,db_recno_t ai_line,u_long rcount,u_int32_t flags)248 v_txt(SCR *sp, VICMD *vp, MARK *tm, const CHAR_T *lp, size_t len, ARG_CHAR_T prompt, db_recno_t ai_line, u_long rcount, u_int32_t flags)
249
250
251 /* To MARK. */
252 /* Input line. */
253 /* Input line length. */
254 /* Prompt to display. */
255 /* Line number to use for autoindent count. */
256 /* Replay count. */
257 /* TXT_* flags. */
258 {
259 EVENT ev, *evp = NULL; /* Current event. */
260 EVENT fc; /* File name completion event. */
261 GS *gp;
262 TEXT *ntp, *tp; /* Input text structures. */
263 TEXT ait; /* Autoindent text structure. */
264 TEXT wmt; /* Wrapmargin text structure. */
265 TEXTH *tiqh;
266 VI_PRIVATE *vip;
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. */
277 u_int8_t is_flags;
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. */
283 size_t max;
284 int tmp;
285 int nochange;
286 CHAR_T *p;
287
288 gp = sp->gp;
289 vip = VIP(sp);
290 memset(&wmt, 0, sizeof(wmt));
291
292 /*
293 * Set the input flag, so tabs get displayed correctly
294 * and everyone knows that the text buffer is in use.
295 */
296 F_SET(sp, SC_TINPUT);
297
298 /*
299 * Get one TEXT structure with some initial buffer space, reusing
300 * the last one if it's big enough. (All TEXT bookkeeping fields
301 * default to 0 -- text_init() handles this.) If changing a line,
302 * copy it into the TEXT buffer.
303 */
304 tiqh = &sp->tiq;
305 if (!TAILQ_EMPTY(tiqh)) {
306 tp = TAILQ_FIRST(tiqh);
307 if (TAILQ_NEXT(tp, q) != NULL || tp->lb_len < len + 32) {
308 text_lfree(tiqh);
309 goto newtp;
310 }
311 tp->ai = tp->insert = tp->offset = tp->owrite = 0;
312 if (lp != NULL) {
313 tp->len = len;
314 BINC_RETW(sp, tp->lb, tp->lb_len, len);
315 MEMMOVEW(tp->lb, lp, len);
316 } else
317 tp->len = 0;
318 } else {
319 newtp: if ((tp = text_init(sp, lp, len, len + 32)) == NULL)
320 return (1);
321 TAILQ_INSERT_HEAD(tiqh, tp, q);
322 }
323
324 /* Set default termination condition. */
325 tp->term = TERM_OK;
326
327 /* Set the starting line, column. */
328 tp->lno = sp->lno;
329 tp->cno = sp->cno;
330
331 /*
332 * Set the insert and overwrite counts. If overwriting characters,
333 * do insertion afterward. If not overwriting characters, assume
334 * doing insertion. If change is to a mark, emphasize it with an
335 * CH_ENDMARK character.
336 */
337 if (len) {
338 if (LF_ISSET(TXT_OVERWRITE)) {
339 tp->owrite = (tm->cno - tp->cno) + 1;
340 tp->insert = (len - tm->cno) - 1;
341 } else
342 tp->insert = len - tp->cno;
343
344 if (LF_ISSET(TXT_EMARK) && txt_emark(sp, tp, tm->cno))
345 return (1);
346 }
347
348 /*
349 * Many of the special cases in text input are to handle autoindent
350 * support. Somebody decided that it would be a good idea if "^^D"
351 * and "0^D" deleted all of the autoindented characters. In an editor
352 * that takes single character input from the user, this beggars the
353 * imagination. Note also, "^^D" resets the next lines' autoindent,
354 * but "0^D" doesn't.
355 *
356 * We assume that autoindent only happens on empty lines, so insert
357 * and overwrite will be zero. If doing autoindent, figure out how
358 * much indentation we need and fill it in. Update input column and
359 * screen cursor as necessary.
360 */
361 if (LF_ISSET(TXT_AUTOINDENT) && ai_line != OOBLNO) {
362 if (v_txt_auto(sp, ai_line, NULL, 0, tp))
363 return (1);
364 tp->cno = tp->ai;
365 } else {
366 /*
367 * The cc and S commands have a special feature -- leading
368 * <blank> characters are handled as autoindent characters.
369 * Beauty!
370 */
371 if (LF_ISSET(TXT_AICHARS)) {
372 tp->offset = 0;
373 tp->ai = tp->cno;
374 } else
375 tp->offset = tp->cno;
376 }
377
378 /* If getting a command buffer from the user, there may be a prompt. */
379 if (LF_ISSET(TXT_PROMPT)) {
380 tp->lb[tp->cno++] = prompt;
381 ++tp->len;
382 ++tp->offset;
383 }
384
385 /*
386 * If appending after the end-of-line, add a space into the buffer
387 * and move the cursor right. This space is inserted, i.e. pushed
388 * along, and then deleted when the line is resolved. Assumes that
389 * the cursor is already positioned at the end of the line. This
390 * avoids the nastiness of having the cursor reside on a magical
391 * column, i.e. a column that doesn't really exist. The only down
392 * side is that we may wrap lines or scroll the screen before it's
393 * strictly necessary. Not a big deal.
394 */
395 if (LF_ISSET(TXT_APPENDEOL)) {
396 tp->lb[tp->cno] = CH_CURSOR;
397 ++tp->len;
398 ++tp->insert;
399 (void)vs_change(sp, tp->lno, LINE_RESET);
400 }
401
402 /*
403 * Historic practice is that the wrapmargin value was a distance
404 * from the RIGHT-HAND margin, not the left. It's more useful to
405 * us as a distance from the left-hand margin, i.e. the same as
406 * the wraplen value. The wrapmargin option is historic practice.
407 * Nvi added the wraplen option so that it would be possible to
408 * edit files with consistent margins without knowing the number of
409 * columns in the window.
410 *
411 * XXX
412 * Setting margin causes a significant performance hit. Normally
413 * we don't update the screen if there are keys waiting, but we
414 * have to if margin is set, otherwise the screen routines don't
415 * know where the cursor is.
416 *
417 * !!!
418 * Abbreviated keys were affected by the wrapmargin option in the
419 * historic 4BSD vi. Mapped keys were usually, but sometimes not.
420 * See the comment in vi/v_text():set_txt_std for more information.
421 *
422 * !!!
423 * One more special case. If an inserted <blank> character causes
424 * wrapmargin to split the line, the next user entered character is
425 * discarded if it's a <space> character.
426 */
427 wm_set = wm_skip = 0;
428 if (LF_ISSET(TXT_WRAPMARGIN))
429 if ((margin = O_VAL(sp, O_WRAPMARGIN)) != 0)
430 margin = sp->cols - margin;
431 else
432 margin = O_VAL(sp, O_WRAPLEN);
433 else
434 margin = 0;
435
436 /* Initialize abbreviation checks. */
437 abcnt = ab_turnoff = 0;
438 abb = F_ISSET(gp, G_ABBREV) &&
439 LF_ISSET(TXT_MAPINPUT) ? AB_INWORD : AB_NOTSET;
440
441 /*
442 * Set up the dot command. Dot commands are done by saving the actual
443 * characters and then reevaluating them so that things like wrapmargin
444 * can change between the insert and the replay.
445 *
446 * !!!
447 * Historically, vi did not remap or reabbreviate replayed input. (It
448 * did beep at you if you changed an abbreviation and then replayed the
449 * input. We're not that compatible.) We don't have to do anything to
450 * avoid remapping, as we're not getting characters from the terminal
451 * routines. Turn the abbreviation check off.
452 *
453 * XXX
454 * It would be nice if we could swallow backspaces and such, but it's
455 * not all that easy to do. What we can do is turn off the common
456 * error messages during the replay. Otherwise, when the user enters
457 * an illegal command, e.g., "Ia<erase><erase><erase><erase>b<escape>",
458 * and then does a '.', they get a list of error messages after command
459 * completion.
460 */
461 rcol = 0;
462 if (LF_ISSET(TXT_REPLAY)) {
463 abb = AB_NOTSET;
464 LF_CLR(TXT_RECORD);
465 }
466
467 /* Other text input mode setup. */
468 quote = Q_NOTSET;
469 carat = C_NOTSET;
470 nochange = 0;
471 FL_INIT(is_flags,
472 LF_ISSET(TXT_SEARCHINCR) ? IS_RESTART | IS_RUNNING : 0);
473 filec_redraw = hexcnt = showmatch = 0;
474
475 /* Initialize input flags. */
476 ec_flags = LF_ISSET(TXT_MAPINPUT) ? EC_MAPINPUT : 0;
477
478 /* Refresh the screen. */
479 UPDATE_POSITION(sp, tp);
480 if (vs_refresh(sp, 1))
481 return (1);
482
483 /* If it's dot, just do it now. */
484 if (F_ISSET(vp, VC_ISDOT))
485 goto replay;
486
487 /* Get an event. */
488 evp = &ev;
489 next: if (v_event_get(sp, evp, 0, ec_flags))
490 return (1);
491
492 /*
493 * If file completion overwrote part of the screen and nothing else has
494 * been displayed, clean up. We don't do this as part of the normal
495 * message resolution because we know the user is on the colon command
496 * line and there's no reason to enter explicit characters to continue.
497 */
498 if (filec_redraw && !F_ISSET(sp, SC_SCR_EXWROTE)) {
499 filec_redraw = 0;
500
501 fc.e_event = E_REPAINT;
502 fc.e_flno = vip->totalcount >=
503 sp->rows ? 1 : sp->rows - vip->totalcount;
504 fc.e_tlno = sp->rows;
505 vip->linecount = vip->lcontinue = vip->totalcount = 0;
506 (void)v_erepaint(sp, &fc);
507 (void)vs_refresh(sp, 1);
508 }
509
510 /* Deal with all non-character events. */
511 switch (evp->e_event) {
512 case E_CHARACTER:
513 break;
514 case E_ERR:
515 case E_EOF:
516 F_SET(sp, SC_EXIT_FORCE);
517 return (1);
518 case E_INTERRUPT:
519 /*
520 * !!!
521 * Historically, <interrupt> exited the user from text input
522 * mode or cancelled a colon command, and returned to command
523 * mode. It also beeped the terminal, but that seems a bit
524 * excessive.
525 */
526 goto k_escape;
527 case E_REPAINT:
528 if (v_erepaint(sp, &ev))
529 return (1);
530 goto next;
531 case E_WRESIZE:
532 /* <resize> interrupts the input mode. */
533 v_emsg(sp, NULL, VIM_WRESIZE);
534 goto k_escape;
535 default:
536 v_event_err(sp, evp);
537 goto k_escape;
538 }
539
540 /*
541 * !!!
542 * If the first character of the input is a nul, replay the previous
543 * input. (Historically, it's okay to replay non-existent input.)
544 * This was not documented as far as I know, and is a great test of vi
545 * clones.
546 */
547 if (rcol == 0 && !LF_ISSET(TXT_REPLAY) && evp->e_c == '\0') {
548 if (vip->rep == NULL)
549 goto done;
550
551 abb = AB_NOTSET;
552 LF_CLR(TXT_RECORD);
553 LF_SET(TXT_REPLAY);
554 goto replay;
555 }
556
557 /*
558 * File name completion and colon command-line editing. We don't
559 * have enough meta characters, so we expect people to overload
560 * them. If the two characters are the same, then we do file name
561 * completion if the cursor is past the first column, and do colon
562 * command-line editing if it's not.
563 */
564 if (quote == Q_NOTSET) {
565 int L__cedit, L__filec;
566
567 L__cedit = L__filec = 0;
568 if (LF_ISSET(TXT_CEDIT) && O_STR(sp, O_CEDIT) != NULL &&
569 O_STR(sp, O_CEDIT)[0] == evp->e_c)
570 L__cedit = 1;
571 if (LF_ISSET(TXT_FILEC) && O_STR(sp, O_FILEC) != NULL &&
572 O_STR(sp, O_FILEC)[0] == evp->e_c)
573 L__filec = 1;
574 if (L__cedit == 1 && (L__filec == 0 || tp->cno == tp->offset)) {
575 tp->term = TERM_CEDIT;
576 goto k_escape;
577 }
578 if (L__filec == 1) {
579 if (txt_fc(sp, tp, &filec_redraw))
580 goto err;
581 goto resolve;
582 }
583 }
584
585 /* Abbreviation overflow check. See comment in txt_abbrev(). */
586 #define MAX_ABBREVIATION_EXPANSION 256
587 if (FL_ISSET(evp->e_flags, CH_ABBREVIATED)) {
588 if (++abcnt > MAX_ABBREVIATION_EXPANSION) {
589 if (v_event_flush(sp, CH_ABBREVIATED))
590 msgq(sp, M_ERR,
591 "191|Abbreviation exceeded expansion limit: characters discarded");
592 abcnt = 0;
593 if (LF_ISSET(TXT_REPLAY))
594 goto done;
595 goto resolve;
596 }
597 } else
598 abcnt = 0;
599
600 /* Check to see if the character fits into the replay buffers. */
601 if (LF_ISSET(TXT_RECORD)) {
602 BINC_GOTO(sp, EVENT, vip->rep,
603 vip->rep_len, (rcol + 1) * sizeof(EVENT));
604 vip->rep[rcol++] = *evp;
605 }
606
607 replay: if (LF_ISSET(TXT_REPLAY)) {
608 if (rcol == vip->rep_cnt)
609 goto k_escape;
610 evp = vip->rep + rcol++;
611 }
612
613 /* Wrapmargin check for leading space. */
614 if (wm_skip) {
615 wm_skip = 0;
616 if (evp->e_c == ' ')
617 goto resolve;
618 }
619
620 /* If quoted by someone else, simply insert the character. */
621 if (FL_ISSET(evp->e_flags, CH_QUOTED))
622 goto insq_ch;
623
624 /*
625 * !!!
626 * If this character was quoted by a K_VLNEXT or a backslash, replace
627 * the placeholder (a carat or a backslash) with the new character.
628 * If it was quoted by a K_VLNEXT, we've already adjusted the cursor
629 * because it has to appear on top of the placeholder character. If
630 * it was quoted by a backslash, adjust the cursor now, the cursor
631 * doesn't appear on top of it. Historic practice in both cases.
632 *
633 * Skip tests for abbreviations; ":ab xa XA" followed by "ixa^V<space>"
634 * doesn't perform an abbreviation. Special case, ^V^J (not ^V^M) is
635 * the same as ^J, historically.
636 */
637 if (quote == Q_BTHIS || quote == Q_VTHIS) {
638 FL_CLR(ec_flags, EC_QUOTED);
639 if (LF_ISSET(TXT_MAPINPUT))
640 FL_SET(ec_flags, EC_MAPINPUT);
641
642 if (quote == Q_BTHIS &&
643 (evp->e_value == K_VERASE || evp->e_value == K_VKILL)) {
644 quote = Q_NOTSET;
645 --tp->cno;
646 ++tp->owrite;
647 goto insl_ch;
648 }
649 if (quote == Q_VTHIS && evp->e_value != K_NL) {
650 quote = Q_NOTSET;
651 goto insl_ch;
652 }
653 quote = Q_NOTSET;
654 }
655
656 /*
657 * !!!
658 * Translate "<CH_HEX>[isxdigit()]*" to a character with a hex value:
659 * this test delimits the value by any non-hex character. Offset by
660 * one, we use 0 to mean that we've found <CH_HEX>.
661 */
662 if (hexcnt > 1 && !ISXDIGIT(evp->e_c)) {
663 hexcnt = 0;
664 if (txt_hex(sp, tp))
665 goto err;
666 }
667
668 switch (evp->e_value) {
669 case K_CR: /* Carriage return. */
670 case K_NL: /* New line. */
671 /* Return in script windows and the command line. */
672 k_cr: if (LF_ISSET(TXT_CR)) {
673 static CHAR_T cr[] = { '\r', 0 };
674 /*
675 * If this was a map, we may have not displayed
676 * the line. Display it, just in case.
677 *
678 * If a script window and not the colon line,
679 * push a <cr> so it gets executed.
680 */
681 if (LF_ISSET(TXT_INFOLINE)) {
682 if (vs_change(sp, tp->lno, LINE_RESET))
683 goto err;
684 } else if (F_ISSET(sp, SC_SCRIPT))
685 (void)v_event_push(sp, NULL, cr, 1, CH_NOMAP);
686
687 /* Set term condition: if empty. */
688 if (tp->cno <= tp->offset)
689 tp->term = TERM_CR;
690 /*
691 * Set term condition: if searching incrementally and
692 * the user entered a pattern, return a completed
693 * search, regardless if the entire pattern was found.
694 */
695 if (FL_ISSET(is_flags, IS_RUNNING) &&
696 tp->cno >= tp->offset + 1)
697 tp->term = TERM_SEARCH;
698
699 goto k_escape;
700 }
701
702 #define LINE_RESOLVE { \
703 /* \
704 * Handle abbreviations. If there was one, discard the \
705 * replay characters. \
706 */ \
707 if (abb == AB_INWORD && \
708 !LF_ISSET(TXT_REPLAY) && F_ISSET(gp, G_ABBREV)) { \
709 if (txt_abbrev(sp, tp, &evp->e_c, \
710 LF_ISSET(TXT_INFOLINE), &tmp, \
711 &ab_turnoff)) \
712 goto err; \
713 if (tmp) { \
714 if (LF_ISSET(TXT_RECORD)) \
715 rcol -= tmp + 1; \
716 goto resolve; \
717 } \
718 } \
719 if (abb != AB_NOTSET) \
720 abb = AB_NOTWORD; \
721 if (UNMAP_TST) \
722 txt_unmap(sp, tp, &ec_flags); \
723 /* \
724 * Delete any appended cursor. It's possible to get in \
725 * situations where TXT_APPENDEOL is set but tp->insert \
726 * is 0 when using the R command and all the characters \
727 * are tp->owrite characters. \
728 */ \
729 if (LF_ISSET(TXT_APPENDEOL) && tp->insert > 0) { \
730 --tp->len; \
731 --tp->insert; \
732 } \
733 }
734 LINE_RESOLVE;
735
736 /*
737 * Save the current line information for restoration in
738 * txt_backup(), and set the line final length.
739 */
740 tp->sv_len = tp->len;
741 tp->sv_cno = tp->cno;
742 tp->len = tp->cno;
743
744 /* Update the old line. */
745 if (vs_change(sp, tp->lno, LINE_RESET))
746 goto err;
747
748 /*
749 * Historic practice, when the autoindent edit option was set,
750 * was to delete <blank> characters following the inserted
751 * newline. This affected the 'R', 'c', and 's' commands; 'c'
752 * and 's' retained the insert characters only, 'R' moved the
753 * overwrite and insert characters into the next TEXT structure.
754 * We keep track of the number of characters erased for the 'R'
755 * command so that the final resolution of the line is correct.
756 */
757 tp->R_erase = 0;
758 owrite = tp->owrite;
759 insert = tp->insert;
760 if (LF_ISSET(TXT_REPLACE) && owrite != 0) {
761 for (p = tp->lb + tp->cno; owrite > 0 && ISBLANK((UCHAR_T)*p);
762 ++p, --owrite, ++tp->R_erase);
763 if (owrite == 0)
764 for (; insert > 0 && ISBLANK((UCHAR_T)*p);
765 ++p, ++tp->R_erase, --insert);
766 } else {
767 p = tp->lb + tp->cno + owrite;
768 if (O_ISSET(sp, O_AUTOINDENT))
769 for (; insert > 0 &&
770 ISBLANK((UCHAR_T)*p); ++p, --insert);
771 owrite = 0;
772 }
773
774 /*
775 * !!!
776 * Create a new line and insert the new TEXT into the queue.
777 * DON'T insert until the old line has been updated, or the
778 * inserted line count in line.c:db_get() will be wrong.
779 */
780 if ((ntp = text_init(sp, p,
781 insert + owrite, insert + owrite + 32)) == NULL)
782 goto err;
783 TAILQ_INSERT_TAIL(&sp->tiq, ntp, q);
784
785 /* Set up bookkeeping for the new line. */
786 ntp->insert = insert;
787 ntp->owrite = owrite;
788 ntp->lno = tp->lno + 1;
789
790 /*
791 * Reset the autoindent line value. 0^D keeps the autoindent
792 * line from changing, ^D changes the level, even if there were
793 * no characters in the old line. Note, if using the current
794 * tp structure, use the cursor as the length, the autoindent
795 * characters may have been erased.
796 */
797 if (LF_ISSET(TXT_AUTOINDENT)) {
798 if (nochange) {
799 nochange = 0;
800 if (v_txt_auto(sp, OOBLNO, &ait, ait.ai, ntp))
801 goto err;
802 FREE_SPACEW(sp, ait.lb, ait.lb_len);
803 } else
804 if (v_txt_auto(sp, OOBLNO, tp, tp->cno, ntp))
805 goto err;
806 carat = C_NOTSET;
807 }
808
809 /* Reset the cursor. */
810 ntp->cno = ntp->ai;
811
812 /*
813 * If we're here because wrapmargin was set and we've broken a
814 * line, there may be additional information (i.e. the start of
815 * a line) in the wmt structure.
816 */
817 if (wm_set) {
818 if (wmt.offset != 0 ||
819 wmt.owrite != 0 || wmt.insert != 0) {
820 #define WMTSPACE wmt.offset + wmt.owrite + wmt.insert
821 BINC_GOTOW(sp, ntp->lb,
822 ntp->lb_len, ntp->len + WMTSPACE + 32);
823 MEMMOVEW(ntp->lb + ntp->cno, wmt.lb, WMTSPACE);
824 ntp->len += WMTSPACE;
825 ntp->cno += wmt.offset;
826 ntp->owrite = wmt.owrite;
827 ntp->insert = wmt.insert;
828 }
829 wm_set = 0;
830 }
831
832 /* New lines are TXT_APPENDEOL. */
833 if (ntp->owrite == 0 && ntp->insert == 0) {
834 BINC_GOTOW(sp, ntp->lb, ntp->lb_len, ntp->len + 1);
835 LF_SET(TXT_APPENDEOL);
836 ntp->lb[ntp->cno] = CH_CURSOR;
837 ++ntp->insert;
838 ++ntp->len;
839 }
840
841 /* Swap old and new TEXT's, and update the new line. */
842 tp = ntp;
843 if (vs_change(sp, tp->lno, LINE_INSERT))
844 goto err;
845
846 goto resolve;
847 case K_ESCAPE: /* Escape. */
848 if (!LF_ISSET(TXT_ESCAPE))
849 goto ins_ch;
850
851 /* If we have a count, start replaying the input. */
852 if (rcount > 1) {
853 --rcount;
854
855 vip->rep_cnt = rcol;
856 rcol = 0;
857 abb = AB_NOTSET;
858 LF_CLR(TXT_RECORD);
859 LF_SET(TXT_REPLAY);
860
861 /*
862 * Some commands (e.g. 'o') need a <newline> for each
863 * repetition.
864 */
865 if (LF_ISSET(TXT_ADDNEWLINE))
866 goto k_cr;
867
868 /*
869 * The R command turns into the 'a' command after the
870 * first repetition.
871 */
872 if (LF_ISSET(TXT_REPLACE)) {
873 tp->insert = tp->owrite;
874 tp->owrite = 0;
875 LF_CLR(TXT_REPLACE);
876 }
877 goto replay;
878 }
879
880 /* Set term condition: if empty. */
881 if (tp->cno <= tp->offset)
882 tp->term = TERM_ESC;
883 /*
884 * Set term condition: if searching incrementally and the user
885 * entered a pattern, return a completed search, regardless if
886 * the entire pattern was found.
887 */
888 if (FL_ISSET(is_flags, IS_RUNNING) && tp->cno >= tp->offset + 1)
889 tp->term = TERM_SEARCH;
890
891 k_escape: LINE_RESOLVE;
892
893 /*
894 * Clean up for the 'R' command, restoring overwrite
895 * characters, and making them into insert characters.
896 */
897 if (LF_ISSET(TXT_REPLACE))
898 txt_Rresolve(sp, &sp->tiq, tp, len);
899
900 /*
901 * If there are any overwrite characters, copy down
902 * any insert characters, and decrement the length.
903 */
904 if (tp->owrite) {
905 if (tp->insert)
906 MEMMOVEW(tp->lb + tp->cno,
907 tp->lb + tp->cno + tp->owrite, tp->insert);
908 tp->len -= tp->owrite;
909 }
910
911 /*
912 * Optionally resolve the lines into the file. If not
913 * resolving the lines into the file, end the line with
914 * a nul. If the line is empty, then set the length to
915 * 0, the termination condition has already been set.
916 *
917 * XXX
918 * This is wrong, should pass back a length.
919 */
920 if (LF_ISSET(TXT_RESOLVE)) {
921 if (txt_resolve(sp, &sp->tiq, flags))
922 goto err;
923 } else {
924 BINC_GOTOW(sp, tp->lb, tp->lb_len, tp->len + 1);
925 tp->lb[tp->len] = '\0';
926 }
927
928 /*
929 * Set the return cursor position to rest on the last
930 * inserted character.
931 */
932 if (tp->cno != 0)
933 --tp->cno;
934
935 /* Update the last line. */
936 if (vs_change(sp, tp->lno, LINE_RESET))
937 return (1);
938 goto done;
939 case K_CARAT: /* Delete autoindent chars. */
940 if (tp->cno <= tp->ai && LF_ISSET(TXT_AUTOINDENT))
941 carat = C_CARATSET;
942 goto ins_ch;
943 case K_ZERO: /* Delete autoindent chars. */
944 if (tp->cno <= tp->ai && LF_ISSET(TXT_AUTOINDENT))
945 carat = C_ZEROSET;
946 goto ins_ch;
947 case K_CNTRLD: /* Delete autoindent char. */
948 /*
949 * If in the first column or no characters to erase, ignore
950 * the ^D (this matches historic practice). If not doing
951 * autoindent or already inserted non-ai characters, it's a
952 * literal. The latter test is done in the switch, as the
953 * CARAT forms are N + 1, not N.
954 */
955 if (!LF_ISSET(TXT_AUTOINDENT))
956 goto ins_ch;
957 if (tp->cno == 0)
958 goto resolve;
959
960 switch (carat) {
961 case C_CARATSET: /* ^^D */
962 if (tp->ai == 0 || tp->cno != tp->ai + tp->offset + 1)
963 goto ins_ch;
964
965 /* Save the ai string for later. */
966 ait.lb = NULL;
967 ait.lb_len = 0;
968 BINC_GOTOW(sp, ait.lb, ait.lb_len, tp->ai);
969 MEMMOVEW(ait.lb, tp->lb, tp->ai);
970 ait.ai = ait.len = tp->ai;
971
972 carat = C_NOTSET;
973 nochange = 1;
974 goto leftmargin;
975 case C_ZEROSET: /* 0^D */
976 if (tp->ai == 0 || tp->cno != tp->ai + tp->offset + 1)
977 goto ins_ch;
978
979 carat = C_NOTSET;
980 leftmargin: tp->lb[tp->cno - 1] = ' ';
981 tp->owrite += tp->cno - tp->offset;
982 tp->cno = tp->offset;
983 break;
984 case C_NOTSET: /* ^D */
985 if (tp->ai == 0 || tp->cno != tp->ai + tp->offset)
986 goto ins_ch;
987
988 (void)txt_dent(sp, tp, 0);
989 break;
990 default:
991 abort();
992 }
993 break;
994 case K_VERASE: /* Erase the last character. */
995 /* If can erase over the prompt, return. */
996 if (tp->cno <= tp->offset && LF_ISSET(TXT_BS)) {
997 tp->term = TERM_BS;
998 goto done;
999 }
1000
1001 /*
1002 * If at the beginning of the line, try and drop back to a
1003 * previously inserted line.
1004 */
1005 if (tp->cno == 0) {
1006 if ((ntp =
1007 txt_backup(sp, &sp->tiq, tp, &flags)) == NULL)
1008 goto err;
1009 tp = ntp;
1010 break;
1011 }
1012
1013 /* If nothing to erase, bell the user. */
1014 if (tp->cno <= tp->offset) {
1015 if (!LF_ISSET(TXT_REPLAY))
1016 txt_nomorech(sp);
1017 break;
1018 }
1019
1020 /* Drop back one character. */
1021 --tp->cno;
1022
1023 /*
1024 * Historically, vi didn't replace the erased characters with
1025 * <blank>s, presumably because it's easier to fix a minor
1026 * typing mistake and continue on if the previous letters are
1027 * already there. This is a problem for incremental searching,
1028 * because the user can no longer tell where they are in the
1029 * colon command line because the cursor is at the last search
1030 * point in the screen. So, if incrementally searching, erase
1031 * the erased characters from the screen.
1032 */
1033 if (FL_ISSET(is_flags, IS_RUNNING))
1034 tp->lb[tp->cno] = ' ';
1035
1036 /*
1037 * Increment overwrite, decrement ai if deleted.
1038 *
1039 * !!!
1040 * Historic vi did not permit users to use erase characters
1041 * to delete autoindent characters. We do. Eat hot death,
1042 * POSIX.
1043 */
1044 ++tp->owrite;
1045 if (tp->cno < tp->ai)
1046 --tp->ai;
1047
1048 /* Reset if we deleted an incremental search character. */
1049 if (FL_ISSET(is_flags, IS_RUNNING))
1050 FL_SET(is_flags, IS_RESTART);
1051 break;
1052 case K_VWERASE: /* Skip back one word. */
1053 /*
1054 * If at the beginning of the line, try and drop back to a
1055 * previously inserted line.
1056 */
1057 if (tp->cno == 0) {
1058 if ((ntp =
1059 txt_backup(sp, &sp->tiq, tp, &flags)) == NULL)
1060 goto err;
1061 tp = ntp;
1062 }
1063
1064 /*
1065 * If at offset, nothing to erase so bell the user.
1066 */
1067 if (tp->cno <= tp->offset) {
1068 if (!LF_ISSET(TXT_REPLAY))
1069 txt_nomorech(sp);
1070 break;
1071 }
1072
1073 /*
1074 * The first werase goes back to any autoindent column and the
1075 * second werase goes back to the offset.
1076 *
1077 * !!!
1078 * Historic vi did not permit users to use erase characters to
1079 * delete autoindent characters.
1080 */
1081 if (tp->ai && tp->cno > tp->ai)
1082 max = tp->ai;
1083 else {
1084 tp->ai = 0;
1085 max = tp->offset;
1086 }
1087
1088 /* Skip over trailing space characters. */
1089 while (tp->cno > max && ISBLANK((UCHAR_T)tp->lb[tp->cno - 1])) {
1090 --tp->cno;
1091 ++tp->owrite;
1092 }
1093 if (tp->cno == max)
1094 break;
1095 /*
1096 * There are three types of word erase found on UNIX systems.
1097 * They can be identified by how the string /a/b/c is treated
1098 * -- as 1, 3, or 6 words. Historic vi had two classes of
1099 * characters, and strings were delimited by them and
1100 * <blank>'s, so, 6 words. The historic tty interface used
1101 * <blank>'s to delimit strings, so, 1 word. The algorithm
1102 * offered in the 4.4BSD tty interface (as stty altwerase)
1103 * treats it as 3 words -- there are two classes of
1104 * characters, and strings are delimited by them and
1105 * <blank>'s. The difference is that the type of the first
1106 * erased character erased is ignored, which is exactly right
1107 * when erasing pathname components. The edit options
1108 * TXT_ALTWERASE and TXT_TTYWERASE specify the 4.4BSD tty
1109 * interface and the historic tty driver behavior,
1110 * respectively, and the default is the same as the historic
1111 * vi behavior.
1112 *
1113 * Overwrite erased characters if doing incremental search;
1114 * see comment above.
1115 */
1116 if (LF_ISSET(TXT_TTYWERASE))
1117 while (tp->cno > max) {
1118 --tp->cno;
1119 ++tp->owrite;
1120 if (FL_ISSET(is_flags, IS_RUNNING))
1121 tp->lb[tp->cno] = ' ';
1122 if (ISBLANK((UCHAR_T)tp->lb[tp->cno - 1]))
1123 break;
1124 }
1125 else {
1126 if (LF_ISSET(TXT_ALTWERASE)) {
1127 --tp->cno;
1128 ++tp->owrite;
1129 if (FL_ISSET(is_flags, IS_RUNNING))
1130 tp->lb[tp->cno] = ' ';
1131 if (ISBLANK((UCHAR_T)tp->lb[tp->cno - 1]))
1132 break;
1133 }
1134 if (tp->cno > max)
1135 tmp = inword((UCHAR_T)tp->lb[tp->cno - 1]);
1136 while (tp->cno > max) {
1137 --tp->cno;
1138 ++tp->owrite;
1139 if (FL_ISSET(is_flags, IS_RUNNING))
1140 tp->lb[tp->cno] = ' ';
1141 if (tmp != inword((UCHAR_T)tp->lb[tp->cno - 1])
1142 || ISBLANK((UCHAR_T)tp->lb[tp->cno - 1]))
1143 break;
1144 }
1145 }
1146
1147 /* Reset if we deleted an incremental search character. */
1148 if (FL_ISSET(is_flags, IS_RUNNING))
1149 FL_SET(is_flags, IS_RESTART);
1150 break;
1151 case K_VKILL: /* Restart this line. */
1152 /*
1153 * !!!
1154 * If at the beginning of the line, try and drop back to a
1155 * previously inserted line. Historic vi did not permit
1156 * users to go back to previous lines.
1157 */
1158 if (tp->cno == 0) {
1159 if ((ntp =
1160 txt_backup(sp, &sp->tiq, tp, &flags)) == NULL)
1161 goto err;
1162 tp = ntp;
1163 }
1164
1165 /* If at offset, nothing to erase so bell the user. */
1166 if (tp->cno <= tp->offset) {
1167 if (!LF_ISSET(TXT_REPLAY))
1168 txt_nomorech(sp);
1169 break;
1170 }
1171
1172 /*
1173 * First kill goes back to any autoindent and second kill goes
1174 * back to the offset.
1175 *
1176 * !!!
1177 * Historic vi did not permit users to use erase characters to
1178 * delete autoindent characters.
1179 */
1180 if (tp->ai && tp->cno > tp->ai)
1181 max = tp->ai;
1182 else {
1183 tp->ai = 0;
1184 max = tp->offset;
1185 }
1186 tp->owrite += tp->cno - max;
1187
1188 /*
1189 * Overwrite erased characters if doing incremental search;
1190 * see comment above.
1191 */
1192 if (FL_ISSET(is_flags, IS_RUNNING))
1193 do {
1194 tp->lb[--tp->cno] = ' ';
1195 } while (tp->cno > max);
1196 else
1197 tp->cno = max;
1198
1199 /* Reset if we deleted an incremental search character. */
1200 if (FL_ISSET(is_flags, IS_RUNNING))
1201 FL_SET(is_flags, IS_RESTART);
1202 break;
1203 case K_CNTRLT: /* Add autoindent characters. */
1204 if (!LF_ISSET(TXT_CNTRLT))
1205 goto ins_ch;
1206 if (txt_dent(sp, tp, 1))
1207 goto err;
1208 goto ebuf_chk;
1209 case K_RIGHTBRACE:
1210 case K_RIGHTPAREN:
1211 if (LF_ISSET(TXT_SHOWMATCH))
1212 showmatch = 1;
1213 goto ins_ch;
1214 case K_BACKSLASH: /* Quote next erase/kill. */
1215 /*
1216 * !!!
1217 * Historic vi tried to make abbreviations after a backslash
1218 * escape work. If you did ":ab x y", and inserted "x\^H",
1219 * (assuming the erase character was ^H) you got "x^H", and
1220 * no abbreviation was done. If you inserted "x\z", however,
1221 * it tried to back up and do the abbreviation, i.e. replace
1222 * 'x' with 'y'. The problem was it got it wrong, and you
1223 * ended up with "zy\".
1224 *
1225 * This is really hard to do (you have to remember the
1226 * word/non-word state, for example), and doesn't make any
1227 * sense to me. Both backslash and the characters it
1228 * (usually) escapes will individually trigger the
1229 * abbreviation, so I don't see why the combination of them
1230 * wouldn't. I don't expect to get caught on this one,
1231 * particularly since it never worked right, but I've been
1232 * wrong before.
1233 *
1234 * Do the tests for abbreviations, so ":ab xa XA",
1235 * "ixa\<K_VERASE>" performs the abbreviation.
1236 */
1237 quote = Q_BNEXT;
1238 goto insq_ch;
1239 case K_VLNEXT: /* Quote next character. */
1240 evp->e_c = '^';
1241 quote = Q_VNEXT;
1242 /*
1243 * Turn on the quote flag so that the underlying routines
1244 * quote the next character where it's possible. Turn off
1245 * the input mapbiting flag so that we don't remap the next
1246 * character.
1247 */
1248 FL_SET(ec_flags, EC_QUOTED);
1249 FL_CLR(ec_flags, EC_MAPINPUT);
1250
1251 /*
1252 * !!!
1253 * Skip the tests for abbreviations, so ":ab xa XA",
1254 * "ixa^V<space>" doesn't perform the abbreviation.
1255 */
1256 goto insl_ch;
1257 case K_HEXCHAR:
1258 hexcnt = 1;
1259 goto insq_ch;
1260 default: /* Insert the character. */
1261 ins_ch: /*
1262 * Historically, vi eliminated nul's out of hand. If the
1263 * beautify option was set, it also deleted any unknown
1264 * ASCII value less than space (040) and the del character
1265 * (0177), except for tabs. Unknown is a key word here.
1266 * Most vi documentation claims that it deleted everything
1267 * but <tab>, <nl> and <ff>, as that's what the original
1268 * 4BSD documentation said. This is obviously wrong,
1269 * however, as <esc> would be included in that list. What
1270 * we do is eliminate any unquoted, iscntrl() character that
1271 * wasn't a replay and wasn't handled specially, except
1272 * <tab> or <ff>.
1273 */
1274 if (LF_ISSET(TXT_BEAUTIFY) && ISCNTRL(evp->e_c) &&
1275 evp->e_value != K_FORMFEED && evp->e_value != K_TAB) {
1276 msgq(sp, M_BERR,
1277 "192|Illegal character; quote to enter");
1278 if (LF_ISSET(TXT_REPLAY))
1279 goto done;
1280 break;
1281 }
1282
1283 insq_ch: /*
1284 * If entering a non-word character after a word, check for
1285 * abbreviations. If there was one, discard replay characters.
1286 * If entering a blank character, check for unmap commands,
1287 * as well.
1288 */
1289 if (!inword((UCHAR_T)evp->e_c)) {
1290 if (abb == AB_INWORD &&
1291 !LF_ISSET(TXT_REPLAY) && F_ISSET(gp, G_ABBREV)) {
1292 if (txt_abbrev(sp, tp, &evp->e_c,
1293 LF_ISSET(TXT_INFOLINE), &tmp, &ab_turnoff))
1294 goto err;
1295 if (tmp) {
1296 if (LF_ISSET(TXT_RECORD))
1297 rcol -= tmp + 1;
1298 goto resolve;
1299 }
1300 }
1301 if (ISBLANK((UCHAR_T)evp->e_c) && UNMAP_TST)
1302 txt_unmap(sp, tp, &ec_flags);
1303 }
1304 if (abb != AB_NOTSET)
1305 abb = inword((UCHAR_T)evp->e_c) ? AB_INWORD : AB_NOTWORD;
1306
1307 insl_ch: if (txt_insch(sp, tp, &evp->e_c, flags))
1308 goto err;
1309
1310 /*
1311 * If we're using K_VLNEXT to quote the next character, then
1312 * we want the cursor to position itself on the ^ placeholder
1313 * we're displaying, to match historic practice.
1314 */
1315 if (quote == Q_VNEXT) {
1316 --tp->cno;
1317 ++tp->owrite;
1318 }
1319
1320 /*
1321 * !!!
1322 * Translate "<CH_HEX>[isxdigit()]*" to a character with
1323 * a hex value: this test delimits the value by the max
1324 * number of hex bytes. Offset by one, we use 0 to mean
1325 * that we've found <CH_HEX>.
1326 */
1327 if (hexcnt != 0 && hexcnt++ == sizeof(CHAR_T) * 2 + 1) {
1328 hexcnt = 0;
1329 if (txt_hex(sp, tp))
1330 goto err;
1331 }
1332
1333 /*
1334 * Check to see if we've crossed the margin.
1335 *
1336 * !!!
1337 * In the historic vi, the wrapmargin value was figured out
1338 * using the display widths of the characters, i.e. <tab>
1339 * characters were counted as two characters if the list edit
1340 * option is set, but as the tabstop edit option number of
1341 * characters otherwise. That's what the vs_column() function
1342 * gives us, so we use it.
1343 */
1344 if (margin != 0) {
1345 if (vs_column(sp, &tcol))
1346 goto err;
1347 if (tcol >= margin) {
1348 if (txt_margin(sp, tp, &wmt, &tmp, flags))
1349 goto err;
1350 if (tmp) {
1351 if (ISBLANK((UCHAR_T)evp->e_c))
1352 wm_skip = 1;
1353 wm_set = 1;
1354 goto k_cr;
1355 }
1356 }
1357 }
1358
1359 /*
1360 * If we've reached the end of the buffer, then we need to
1361 * switch into insert mode. This happens when there's a
1362 * change to a mark and the user puts in more characters than
1363 * the length of the motion.
1364 */
1365 ebuf_chk: if (tp->cno >= tp->len) {
1366 BINC_GOTOW(sp, tp->lb, tp->lb_len, tp->len + 1);
1367 LF_SET(TXT_APPENDEOL);
1368
1369 tp->lb[tp->cno] = CH_CURSOR;
1370 ++tp->insert;
1371 ++tp->len;
1372 }
1373
1374 /* Step the quote state forward. */
1375 if (quote != Q_NOTSET) {
1376 if (quote == Q_BNEXT)
1377 quote = Q_BTHIS;
1378 if (quote == Q_VNEXT)
1379 quote = Q_VTHIS;
1380 }
1381 break;
1382 }
1383
1384 #ifdef DEBUG
1385 if (tp->cno + tp->insert + tp->owrite != tp->len) {
1386 msgq(sp, M_ERR,
1387 "len %u != cno: %u ai: %u insert %u overwrite %u",
1388 tp->len, tp->cno, tp->ai, tp->insert, tp->owrite);
1389 if (LF_ISSET(TXT_REPLAY))
1390 goto done;
1391 tp->len = tp->cno + tp->insert + tp->owrite;
1392 }
1393 #endif
1394
1395 resolve:/*
1396 * 1: If we don't need to know where the cursor really is and we're
1397 * replaying text, keep going.
1398 */
1399 if (margin == 0 && LF_ISSET(TXT_REPLAY))
1400 goto replay;
1401
1402 /*
1403 * 2: Reset the line. Don't bother unless we're about to wait on
1404 * a character or we need to know where the cursor really is.
1405 * We have to do this before showing matching characters so the
1406 * user can see what they're matching.
1407 */
1408 if ((margin != 0 || !KEYS_WAITING(sp)) &&
1409 vs_change(sp, tp->lno, LINE_RESET))
1410 return (1);
1411
1412 /*
1413 * 3: If there aren't keys waiting, display the matching character.
1414 * We have to do this before resolving any messages, otherwise
1415 * the error message from a missing match won't appear correctly.
1416 */
1417 if (showmatch) {
1418 if (!KEYS_WAITING(sp) && txt_showmatch(sp, tp))
1419 return (1);
1420 showmatch = 0;
1421 }
1422
1423 /*
1424 * 4: If there have been messages and we're not editing on the colon
1425 * command line or doing file name completion, resolve them.
1426 */
1427 if ((vip->totalcount != 0 || F_ISSET(gp, G_BELLSCHED)) &&
1428 !F_ISSET(sp, SC_TINPUT_INFO) && !filec_redraw &&
1429 vs_resolve(sp, NULL, 0))
1430 return (1);
1431
1432 /*
1433 * 5: Refresh the screen if we're about to wait on a character or we
1434 * need to know where the cursor really is.
1435 */
1436 if (margin != 0 || !KEYS_WAITING(sp)) {
1437 UPDATE_POSITION(sp, tp);
1438 if (vs_refresh(sp, margin != 0))
1439 return (1);
1440 }
1441
1442 /* 6: Proceed with the incremental search. */
1443 if (FL_ISSET(is_flags, IS_RUNNING) && txt_isrch(sp, vp, tp, &is_flags))
1444 return (1);
1445
1446 /* 7: Next character... */
1447 if (LF_ISSET(TXT_REPLAY))
1448 goto replay;
1449 goto next;
1450
1451 done: /* Leave input mode. */
1452 F_CLR(sp, SC_TINPUT);
1453
1454 /* If recording for playback, save it. */
1455 if (LF_ISSET(TXT_RECORD))
1456 vip->rep_cnt = rcol;
1457
1458 /*
1459 * If not working on the colon command line, set the final cursor
1460 * position.
1461 */
1462 if (!F_ISSET(sp, SC_TINPUT_INFO)) {
1463 vp->m_final.lno = tp->lno;
1464 vp->m_final.cno = tp->cno;
1465 }
1466 return (0);
1467
1468 err:
1469 alloc_err:
1470 F_CLR(sp, SC_TINPUT);
1471 txt_err(sp, &sp->tiq);
1472 return (1);
1473 }
1474
1475 /*
1476 * txt_abbrev --
1477 * Handle abbreviations.
1478 */
1479 static int
txt_abbrev(SCR * sp,TEXT * tp,ARG_CHAR_T * pushcp,int isinfoline,int * didsubp,int * turnoffp)1480 txt_abbrev(SCR *sp, TEXT *tp, ARG_CHAR_T *pushcp, int isinfoline, int *didsubp, int *turnoffp)
1481 {
1482 CHAR_T ch, *p;
1483 SEQ *qp;
1484 size_t len, off;
1485
1486 /* Check to make sure we're not at the start of an append. */
1487 *didsubp = 0;
1488 if (tp->cno == tp->offset)
1489 return (0);
1490
1491 /*
1492 * Find the start of the "word".
1493 *
1494 * !!!
1495 * We match historic practice, which, as far as I can tell, had an
1496 * off-by-one error. The way this worked was that when the inserted
1497 * text switched from a "word" character to a non-word character,
1498 * vi would check for possible abbreviations. It would then take the
1499 * type (i.e. word/non-word) of the character entered TWO characters
1500 * ago, and move backward in the text until reaching a character that
1501 * was not that type, or the beginning of the insert, the line, or
1502 * the file. For example, in the string "abc<space>", when the <space>
1503 * character triggered the abbreviation check, the type of the 'b'
1504 * character was used for moving through the string. Maybe there's a
1505 * reason for not using the first (i.e. 'c') character, but I can't
1506 * think of one.
1507 *
1508 * Terminate at the beginning of the insert or the character after the
1509 * offset character -- both can be tested for using tp->offset.
1510 */
1511 off = tp->cno - 1; /* Previous character. */
1512 p = tp->lb + off;
1513 len = 1; /* One character test. */
1514 if (off == tp->offset || ISBLANK((UCHAR_T)p[-1]))
1515 goto search;
1516 if (inword((UCHAR_T)p[-1])) /* Move backward to change. */
1517 for (;;) {
1518 --off; --p; ++len;
1519 if (off == tp->offset || !inword((UCHAR_T)p[-1]))
1520 break;
1521 }
1522 else
1523 for (;;) {
1524 --off; --p; ++len;
1525 if (off == tp->offset ||
1526 inword((UCHAR_T)p[-1]) || ISBLANK((UCHAR_T)p[-1]))
1527 break;
1528 }
1529
1530 /*
1531 * !!!
1532 * Historic vi exploded abbreviations on the command line. This has
1533 * obvious problems in that unabbreviating the string can be extremely
1534 * tricky, particularly if the string has, say, an embedded escape
1535 * character. Personally, I think it's a stunningly bad idea. Other
1536 * examples of problems this caused in historic vi are:
1537 * :ab foo bar
1538 * :ab foo baz
1539 * results in "bar" being abbreviated to "baz", which wasn't what the
1540 * user had in mind at all. Also, the commands:
1541 * :ab foo bar
1542 * :unab foo<space>
1543 * resulted in an error message that "bar" wasn't mapped. Finally,
1544 * since the string was already exploded by the time the unabbreviate
1545 * command got it, all it knew was that an abbreviation had occurred.
1546 * Cleverly, it checked the replacement string for its unabbreviation
1547 * match, which meant that the commands:
1548 * :ab foo1 bar
1549 * :ab foo2 bar
1550 * :unab foo2
1551 * unabbreviate "foo1", and the commands:
1552 * :ab foo bar
1553 * :ab bar baz
1554 * unabbreviate "foo"!
1555 *
1556 * Anyway, people neglected to first ask my opinion before they wrote
1557 * macros that depend on this stuff, so, we make this work as follows.
1558 * When checking for an abbreviation on the command line, if we get a
1559 * string which is <blank> terminated and which starts at the beginning
1560 * of the line, we check to see it is the abbreviate or unabbreviate
1561 * commands. If it is, turn abbreviations off and return as if no
1562 * abbreviation was found. Note also, minor trickiness, so that if
1563 * the user erases the line and starts another command, we turn the
1564 * abbreviations back on.
1565 *
1566 * This makes the layering look like a Nachos Supreme.
1567 */
1568 search: if (isinfoline) {
1569 if (off == tp->ai || off == tp->offset)
1570 if (ex_is_abbrev(sp, p, len)) {
1571 *turnoffp = 1;
1572 return (0);
1573 } else
1574 *turnoffp = 0;
1575 else
1576 if (*turnoffp)
1577 return (0);
1578 }
1579
1580 /* Check for any abbreviations. */
1581 if ((qp = seq_find(sp, NULL, NULL, p, len, SEQ_ABBREV, NULL)) == NULL)
1582 return (0);
1583
1584 /*
1585 * Push the abbreviation onto the tty stack. Historically, characters
1586 * resulting from an abbreviation expansion were themselves subject to
1587 * map expansions, O_SHOWMATCH matching etc. This means the expanded
1588 * characters will be re-tested for abbreviations. It's difficult to
1589 * know what historic practice in this case was, since abbreviations
1590 * were applied to :colon command lines, so entering abbreviations that
1591 * looped was tricky, although possible. In addition, obvious loops
1592 * didn't work as expected. (The command ':ab a b|ab b c|ab c a' will
1593 * silently only implement and/or display the last abbreviation.)
1594 *
1595 * This implementation doesn't recover well from such abbreviations.
1596 * The main input loop counts abbreviated characters, and, when it
1597 * reaches a limit, discards any abbreviated characters on the queue.
1598 * It's difficult to back up to the original position, as the replay
1599 * queue would have to be adjusted, and the line state when an initial
1600 * abbreviated character was received would have to be saved.
1601 */
1602 ch = (UCHAR_T)*pushcp;
1603 if (v_event_push(sp, NULL, &ch, 1, CH_ABBREVIATED))
1604 return (1);
1605 if (v_event_push(sp, NULL, qp->output, qp->olen, CH_ABBREVIATED))
1606 return (1);
1607
1608 /*
1609 * If the size of the abbreviation is larger than or equal to the size
1610 * of the original text, move to the start of the replaced characters,
1611 * and add their length to the overwrite count.
1612 *
1613 * If the abbreviation is smaller than the original text, we have to
1614 * delete the additional overwrite characters and copy down any insert
1615 * characters.
1616 */
1617 tp->cno -= len;
1618 if (qp->olen >= len)
1619 tp->owrite += len;
1620 else {
1621 if (tp->insert)
1622 MEMMOVEW(tp->lb + tp->cno + qp->olen,
1623 tp->lb + tp->cno + tp->owrite + len, tp->insert);
1624 tp->owrite += qp->olen;
1625 tp->len -= len - qp->olen;
1626 }
1627
1628 /*
1629 * We return the length of the abbreviated characters. This is so
1630 * the calling routine can replace the replay characters with the
1631 * abbreviation. This means that subsequent '.' commands will produce
1632 * the same text, regardless of intervening :[un]abbreviate commands.
1633 * This is historic practice.
1634 */
1635 *didsubp = len;
1636 return (0);
1637 }
1638
1639 /*
1640 * txt_unmap --
1641 * Handle the unmap command.
1642 */
1643 static void
txt_unmap(SCR * sp,TEXT * tp,u_int32_t * ec_flagsp)1644 txt_unmap(SCR *sp, TEXT *tp, u_int32_t *ec_flagsp)
1645 {
1646 size_t len, off;
1647 CHAR_T *p;
1648
1649 /* Find the beginning of this "word". */
1650 for (off = tp->cno - 1, p = tp->lb + off, len = 0;; --p, --off) {
1651 if (ISBLANK((UCHAR_T)*p)) {
1652 ++p;
1653 break;
1654 }
1655 ++len;
1656 if (off == tp->ai || off == tp->offset)
1657 break;
1658 }
1659
1660 /*
1661 * !!!
1662 * Historic vi exploded input mappings on the command line. See the
1663 * txt_abbrev() routine for an explanation of the problems inherent
1664 * in this.
1665 *
1666 * We make this work as follows. If we get a string which is <blank>
1667 * terminated and which starts at the beginning of the line, we check
1668 * to see it is the unmap command. If it is, we return that the input
1669 * mapping should be turned off. Note also, minor trickiness, so that
1670 * if the user erases the line and starts another command, we go ahead
1671 * an turn mapping back on.
1672 */
1673 if ((off == tp->ai || off == tp->offset) && ex_is_unmap(sp, p, len))
1674 FL_CLR(*ec_flagsp, EC_MAPINPUT);
1675 else
1676 FL_SET(*ec_flagsp, EC_MAPINPUT);
1677 }
1678
1679 /*
1680 * txt_ai_resolve --
1681 * When a line is resolved by <esc>, review autoindent characters.
1682 */
1683 static void
txt_ai_resolve(SCR * sp,TEXT * tp,int * changedp)1684 txt_ai_resolve(SCR *sp, TEXT *tp, int *changedp)
1685 {
1686 u_long ts;
1687 int delc;
1688 size_t cno, len, new, old, scno, spaces, tab_after_sp, tabs;
1689 CHAR_T *p;
1690
1691 *changedp = 0;
1692
1693 /*
1694 * If the line is empty, has an offset, or no autoindent
1695 * characters, we're done.
1696 */
1697 if (!tp->len || tp->offset || !tp->ai)
1698 return;
1699
1700 /*
1701 * If the length is less than or equal to the autoindent
1702 * characters, delete them.
1703 */
1704 if (tp->len <= tp->ai) {
1705 tp->ai = tp->cno = tp->len = 0;
1706 return;
1707 }
1708
1709 /*
1710 * The autoindent characters plus any leading <blank> characters
1711 * in the line are resolved into the minimum number of characters.
1712 * Historic practice.
1713 */
1714 ts = O_VAL(sp, O_TABSTOP);
1715
1716 /* Figure out the last <blank> screen column. */
1717 for (p = tp->lb, scno = 0, len = tp->len,
1718 spaces = tab_after_sp = 0; len-- && ISBLANK((UCHAR_T)*p); ++p)
1719 if (*p == '\t') {
1720 if (spaces)
1721 tab_after_sp = 1;
1722 scno += COL_OFF(scno, ts);
1723 } else {
1724 ++spaces;
1725 ++scno;
1726 }
1727
1728 /*
1729 * If there are no spaces, or no tabs after spaces and less than
1730 * ts spaces, it's already minimal.
1731 * Keep analysing if expandtab is set.
1732 */
1733 if ((!spaces || (!tab_after_sp && spaces < ts)) &&
1734 !O_ISSET(sp, O_EXPANDTAB))
1735 return;
1736
1737 /* Count up spaces/tabs needed to get to the target. */
1738 cno = 0;
1739 tabs = 0;
1740 if (!O_ISSET(sp, O_EXPANDTAB)) {
1741 for (; cno + COL_OFF(cno, ts) <= scno; ++tabs)
1742 cno += COL_OFF(cno, ts);
1743 }
1744 spaces = scno - cno;
1745
1746 /*
1747 * Figure out how many characters we're dropping -- if we're not
1748 * dropping any, it's already minimal, we're done.
1749 */
1750 old = p - tp->lb;
1751 new = spaces + tabs;
1752 if (old == new)
1753 return;
1754
1755 /* Shift the rest of the characters down, adjust the counts. */
1756 delc = old - new;
1757 MEMMOVEW(p - delc, p, tp->len - old);
1758 tp->len -= delc;
1759 tp->cno -= delc;
1760
1761 /* Fill in space/tab characters. */
1762 for (p = tp->lb; tabs--;)
1763 *p++ = '\t';
1764 while (spaces--)
1765 *p++ = ' ';
1766 *changedp = 1;
1767 }
1768
1769 /*
1770 * v_txt_auto --
1771 * Handle autoindent. If aitp isn't NULL, use it, otherwise,
1772 * retrieve the line.
1773 *
1774 * PUBLIC: int v_txt_auto __P((SCR *, db_recno_t, TEXT *, size_t, TEXT *));
1775 */
1776 int
v_txt_auto(SCR * sp,db_recno_t lno,TEXT * aitp,size_t len,TEXT * tp)1777 v_txt_auto(SCR *sp, db_recno_t lno, TEXT *aitp, size_t len, TEXT *tp)
1778 {
1779 size_t nlen;
1780 CHAR_T *p, *t;
1781
1782 if (aitp == NULL) {
1783 /*
1784 * If the ex append command is executed with an address of 0,
1785 * it's possible to get here with a line number of 0. Return
1786 * an indent of 0.
1787 */
1788 if (lno == 0) {
1789 tp->ai = 0;
1790 return (0);
1791 }
1792 if (db_get(sp, lno, DBG_FATAL, &t, &len))
1793 return (1);
1794 } else
1795 t = aitp->lb;
1796
1797 /* Count whitespace characters. */
1798 for (p = t; len > 0; ++p, --len)
1799 if (!ISBLANK((UCHAR_T)*p))
1800 break;
1801
1802 /* Set count, check for no indentation. */
1803 if ((nlen = (p - t)) == 0)
1804 return (0);
1805
1806 /* Make sure the buffer's big enough. */
1807 BINC_RETW(sp, tp->lb, tp->lb_len, tp->len + nlen);
1808
1809 /* Copy the buffer's current contents up. */
1810 if (tp->len != 0)
1811 MEMMOVEW(tp->lb + nlen, tp->lb, tp->len);
1812 tp->len += nlen;
1813
1814 /* Copy the indentation into the new buffer. */
1815 MEMMOVEW(tp->lb, t, nlen);
1816
1817 /* Set the autoindent count. */
1818 tp->ai = nlen;
1819 return (0);
1820 }
1821
1822 /*
1823 * txt_backup --
1824 * Back up to the previously edited line.
1825 */
1826 static TEXT *
txt_backup(SCR * sp,TEXTH * tiqh,TEXT * tp,u_int32_t * flagsp)1827 txt_backup(SCR *sp, TEXTH *tiqh, TEXT *tp, u_int32_t *flagsp)
1828 {
1829 TEXT *ntp;
1830
1831 /* Get a handle on the previous TEXT structure. */
1832 if ((ntp = TAILQ_PREV(tp, _texth, q)) == NULL) {
1833 if (!FL_ISSET(*flagsp, TXT_REPLAY))
1834 msgq(sp, M_BERR,
1835 "193|Already at the beginning of the insert");
1836 return (tp);
1837 }
1838
1839 /* Bookkeeping. */
1840 ntp->len = ntp->sv_len;
1841
1842 /* Handle appending to the line. */
1843 if (ntp->owrite == 0 && ntp->insert == 0) {
1844 ntp->lb[ntp->len] = CH_CURSOR;
1845 ++ntp->insert;
1846 ++ntp->len;
1847 FL_SET(*flagsp, TXT_APPENDEOL);
1848 } else
1849 FL_CLR(*flagsp, TXT_APPENDEOL);
1850
1851 /* Release the current TEXT. */
1852 TAILQ_REMOVE(tiqh, tp, q);
1853 text_free(tp);
1854
1855 /* Update the old line on the screen. */
1856 if (vs_change(sp, ntp->lno + 1, LINE_DELETE))
1857 return (NULL);
1858
1859 /* Return the new/current TEXT. */
1860 return (ntp);
1861 }
1862
1863 /*
1864 * Text indentation is truly strange. ^T and ^D do movements to the next or
1865 * previous shiftwidth value, i.e. for a 1-based numbering, with shiftwidth=3,
1866 * ^T moves a cursor on the 7th, 8th or 9th column to the 10th column, and ^D
1867 * moves it back.
1868 *
1869 * !!!
1870 * The ^T and ^D characters in historical vi had special meaning only when they
1871 * were the first characters entered after entering text input mode. As normal
1872 * erase characters couldn't erase autoindent characters (^T in this case), it
1873 * meant that inserting text into previously existing text was strange -- ^T
1874 * only worked if it was the first keystroke(s), and then could only be erased
1875 * using ^D. This implementation treats ^T specially anywhere it occurs in the
1876 * input, and permits the standard erase characters to erase the characters it
1877 * inserts.
1878 *
1879 * !!!
1880 * A fun test is to try:
1881 * :se sw=4 ai list
1882 * i<CR>^Tx<CR>^Tx<CR>^Tx<CR>^Dx<CR>^Dx<CR>^Dx<esc>
1883 * Historic vi loses some of the '$' marks on the line ends, but otherwise gets
1884 * it right.
1885 *
1886 * XXX
1887 * Technically, txt_dent should be part of the screen interface, as it requires
1888 * knowledge of character sizes, including <space>s, on the screen. It's here
1889 * because it's a complicated little beast, and I didn't want to shove it down
1890 * into the screen. It's probable that KEY_LEN will call into the screen once
1891 * there are screens with different character representations.
1892 *
1893 * txt_dent --
1894 * Handle ^T indents, ^D outdents.
1895 *
1896 * If anything changes here, check the ex version to see if it needs similar
1897 * changes.
1898 */
1899 static int
txt_dent(SCR * sp,TEXT * tp,int isindent)1900 txt_dent(SCR *sp, TEXT *tp, int isindent)
1901 {
1902 ARG_CHAR_T ch;
1903 u_long sw, ts;
1904 size_t cno, current, spaces, target, tabs;
1905
1906 ts = O_VAL(sp, O_TABSTOP);
1907 sw = O_VAL(sp, O_SHIFTWIDTH);
1908
1909 /*
1910 * Since we don't know what precedes the character(s) being inserted
1911 * (or deleted), the preceding whitespace characters must be resolved.
1912 * An example is a <tab>, which doesn't need a full shiftwidth number
1913 * of columns because it's preceded by <space>s. This is easy to get
1914 * if the user sets shiftwidth to a value less than tabstop (or worse,
1915 * something for which tabstop isn't a multiple) and then uses ^T to
1916 * indent, and ^D to outdent.
1917 *
1918 * Figure out the current and target screen columns. In the historic
1919 * vi, the autoindent column was NOT determined using display widths
1920 * of characters as was the wrapmargin column. For that reason, we
1921 * can't use the vs_column() function, but have to calculate it here.
1922 * This is slow, but it's normally only on the first few characters of
1923 * a line.
1924 */
1925 for (current = cno = 0; cno < tp->cno; ++cno)
1926 current += tp->lb[cno] == '\t' ?
1927 COL_OFF(current, ts) : KEY_COL(sp, tp->lb[cno]);
1928
1929 target = current;
1930 if (isindent)
1931 target += COL_OFF(target, sw);
1932 else {
1933 --target;
1934 target -= target % sw;
1935 }
1936
1937 /*
1938 * Back up over any previous <blank> characters, changing them into
1939 * overwrite characters (including any ai characters). Then figure
1940 * out the current screen column.
1941 */
1942 for (; tp->cno > tp->offset &&
1943 (tp->lb[tp->cno - 1] == ' ' || tp->lb[tp->cno - 1] == '\t');
1944 --tp->cno, ++tp->owrite);
1945 for (current = cno = 0; cno < tp->cno; ++cno)
1946 current += tp->lb[cno] == '\t' ?
1947 COL_OFF(current, ts) : KEY_COL(sp, tp->lb[cno]);
1948
1949 /*
1950 * If we didn't move up to or past the target, it's because there
1951 * weren't enough characters to delete, e.g. the first character
1952 * of the line was a tp->offset character, and the user entered
1953 * ^D to move to the beginning of a line. An example of this is:
1954 *
1955 * :set ai sw=4<cr>i<space>a<esc>i^T^D
1956 *
1957 * Otherwise, count up the total spaces/tabs needed to get from the
1958 * beginning of the line (or the last non-<blank> character) to the
1959 * target.
1960 */
1961 if (current >= target)
1962 spaces = tabs = 0;
1963 else {
1964 cno = current;
1965 tabs = 0;
1966 if (!O_ISSET(sp, O_EXPANDTAB)) {
1967 for (; cno + COL_OFF(cno, ts) <= target; ++tabs)
1968 cno += COL_OFF(cno, ts);
1969 }
1970 spaces = target - cno;
1971 }
1972
1973 tp->ai = tabs + spaces;
1974
1975 /*
1976 * Call txt_insch() to insert each character, so that we get the
1977 * correct effect when we add a <tab> to replace N <spaces>.
1978 */
1979 for (ch = '\t'; tabs > 0; --tabs)
1980 (void)txt_insch(sp, tp, &ch, 0);
1981 for (ch = ' '; spaces > 0; --spaces)
1982 (void)txt_insch(sp, tp, &ch, 0);
1983 return (0);
1984 }
1985
1986 /*
1987 * txt_fc --
1988 * File name completion.
1989 */
1990 static int
txt_fc(SCR * sp,TEXT * tp,int * redrawp)1991 txt_fc(SCR *sp, TEXT *tp, int *redrawp)
1992 {
1993 struct stat sb;
1994 ARGS **argv;
1995 CHAR_T s_ch;
1996 EXCMD cmd;
1997 size_t indx, len, nlen, off;
1998 int argc, trydir;
1999 CHAR_T *p, *t;
2000 const char *np;
2001 size_t nplen;
2002
2003 trydir = 0;
2004 *redrawp = 0;
2005
2006 /*
2007 * Find the beginning of this "word" -- if we're at the beginning
2008 * of the line, it's a special case.
2009 */
2010 if (tp->cno == 1) {
2011 len = 0;
2012 p = tp->lb;
2013 } else
2014 retry: for (len = 0,
2015 off = tp->cno - 1, p = tp->lb + off;; --off, --p) {
2016 if (ISBLANK((UCHAR_T)*p)) {
2017 ++p;
2018 break;
2019 }
2020 ++len;
2021 if (off == tp->ai || off == tp->offset)
2022 break;
2023 }
2024
2025 /*
2026 * Get enough space for a wildcard character.
2027 *
2028 * XXX
2029 * This won't work for "foo\", since the \ will escape the expansion
2030 * character. I'm not sure if that's a bug or not...
2031 */
2032 off = p - tp->lb;
2033 BINC_RETW(sp, tp->lb, tp->lb_len, tp->len + 1);
2034 p = tp->lb + off;
2035
2036 s_ch = p[len];
2037 p[len] = '*';
2038
2039 /* Build an ex command, and call the ex expansion routines. */
2040 ex_cinit(sp, &cmd, 0, 0, OOBLNO, OOBLNO, 0);
2041 if (argv_exp2(sp, &cmd, p, len + 1)) {
2042 p[len] = s_ch;
2043 return (0);
2044 }
2045 argc = cmd.argc;
2046 argv = cmd.argv;
2047
2048 p[len] = s_ch;
2049
2050 switch (argc) {
2051 case 0: /* No matches. */
2052 if (!trydir)
2053 (void)sp->gp->scr_bell(sp);
2054 return (0);
2055 case 1: /* One match. */
2056 /* If something changed, do the exchange. */
2057 nlen = STRLEN(cmd.argv[0]->bp);
2058 if (len != nlen || MEMCMP(cmd.argv[0]->bp, p, len))
2059 break;
2060
2061 /* If haven't done a directory test, do it now. */
2062 INT2CHAR(sp, cmd.argv[0]->bp, cmd.argv[0]->len + 1,
2063 np, nplen);
2064 if (!trydir &&
2065 !stat(np, &sb) && S_ISDIR(sb.st_mode)) {
2066 p += len;
2067 goto isdir;
2068 }
2069
2070 /* If nothing changed, period, ring the bell. */
2071 if (!trydir)
2072 (void)sp->gp->scr_bell(sp);
2073 return (0);
2074 default: /* Multiple matches. */
2075 *redrawp = 1;
2076 if (txt_fc_col(sp, argc, argv))
2077 return (1);
2078
2079 /* Find the length of the shortest match. */
2080 for (nlen = cmd.argv[0]->len; --argc > 0;) {
2081 if (cmd.argv[argc]->len < nlen)
2082 nlen = cmd.argv[argc]->len;
2083 for (indx = 0; indx < nlen &&
2084 cmd.argv[argc]->bp[indx] == cmd.argv[0]->bp[indx];
2085 ++indx);
2086 nlen = indx;
2087 }
2088 break;
2089 }
2090
2091 /* Overwrite the expanded text first. */
2092 for (t = cmd.argv[0]->bp; len > 0 && nlen > 0; --len, --nlen)
2093 *p++ = *t++;
2094
2095 /* If lost text, make the remaining old text overwrite characters. */
2096 if (len) {
2097 tp->cno -= len;
2098 tp->owrite += len;
2099 }
2100
2101 /* Overwrite any overwrite characters next. */
2102 for (; nlen > 0 && tp->owrite > 0; --nlen, --tp->owrite, ++tp->cno)
2103 *p++ = *t++;
2104
2105 /* Shift remaining text up, and move the cursor to the end. */
2106 if (nlen) {
2107 off = p - tp->lb;
2108 BINC_RETW(sp, tp->lb, tp->lb_len, tp->len + nlen);
2109 p = tp->lb + off;
2110
2111 tp->cno += nlen;
2112 tp->len += nlen;
2113
2114 if (tp->insert != 0)
2115 (void)MEMMOVEW(p + nlen, p, tp->insert);
2116 while (nlen--)
2117 *p++ = *t++;
2118 }
2119
2120 /* If a single match and it's a directory, retry it. */
2121 INT2CHAR(sp, cmd.argv[0]->bp, cmd.argv[0]->len + 1, np, nplen);
2122 if (argc == 1 && !stat(np, &sb) && S_ISDIR(sb.st_mode)) {
2123 isdir: if (tp->owrite == 0) {
2124 off = p - tp->lb;
2125 BINC_RETW(sp, tp->lb, tp->lb_len, tp->len + 1);
2126 p = tp->lb + off;
2127 if (tp->insert != 0)
2128 (void)MEMMOVEW(p + 1, p, tp->insert);
2129 ++tp->len;
2130 } else
2131 --tp->owrite;
2132
2133 ++tp->cno;
2134 *p++ = '/';
2135
2136 trydir = 1;
2137 goto retry;
2138 }
2139 return (0);
2140 }
2141
2142 /*
2143 * txt_fc_col --
2144 * Display file names for file name completion.
2145 */
2146 static int
txt_fc_col(SCR * sp,int argc,ARGS ** argv)2147 txt_fc_col(SCR *sp, int argc, ARGS **argv)
2148 {
2149 ARGS **av;
2150 CHAR_T *p;
2151 GS *gp;
2152 size_t base, cnt, col, colwidth, numrows, numcols, prefix, row;
2153 int ac, nf, reset;
2154 const char *np;
2155 char *pp;
2156 size_t nlen;
2157
2158 gp = sp->gp;
2159
2160 /* Trim any directory prefix common to all of the files. */
2161 INT2CHAR(sp, argv[0]->bp, argv[0]->len + 1, np, nlen);
2162 if ((pp = strrchr(np, '/')) == NULL)
2163 prefix = 0;
2164 else {
2165 prefix = (pp - np) + 1;
2166 for (ac = argc - 1, av = argv + 1; ac > 0; --ac, ++av)
2167 if (av[0]->len < prefix ||
2168 MEMCMP(av[0]->bp, argv[0]->bp,
2169 prefix)) {
2170 prefix = 0;
2171 break;
2172 }
2173 }
2174
2175 /*
2176 * Figure out the column width for the longest name. Output is done on
2177 * 6 character "tab" boundaries for no particular reason. (Since we
2178 * don't output tab characters, we ignore the terminal's tab settings.)
2179 * Ignore the user's tab setting because we have no idea how reasonable
2180 * it is.
2181 */
2182 for (ac = argc, av = argv, colwidth = 0; ac > 0; --ac, ++av) {
2183 for (col = 0, p = av[0]->bp + prefix; *p != '\0'; ++p)
2184 col += KEY_LEN(sp, *p);
2185 if (col > colwidth)
2186 colwidth = col;
2187 }
2188 colwidth += COL_OFF(colwidth, 6);
2189
2190 /*
2191 * Writing to the bottom line of the screen is always turned off when
2192 * SC_TINPUT_INFO is set. Turn it back on, we know what we're doing.
2193 */
2194 if (F_ISSET(sp, SC_TINPUT_INFO)) {
2195 reset = 1;
2196 F_CLR(sp, SC_TINPUT_INFO);
2197 } else
2198 reset = 0;
2199
2200 #define CHK_INTR \
2201 if (F_ISSET(gp, G_INTERRUPTED)) \
2202 goto intr;
2203
2204 /* If the largest file name is too large, just print them. */
2205 if (colwidth > sp->cols) {
2206 for (ac = argc, av = argv; ac > 0; --ac, ++av) {
2207 INT2CHAR(sp, av[0]->bp+prefix, av[0]->len+1-prefix,
2208 np, nlen);
2209 pp = msg_print(sp, np, &nf);
2210 (void)ex_printf(sp, "%s\n", pp);
2211 if (F_ISSET(gp, G_INTERRUPTED))
2212 break;
2213 }
2214 if (nf)
2215 FREE_SPACE(sp, pp, 0);
2216 CHK_INTR;
2217 } else {
2218 /* Figure out the number of columns. */
2219 numcols = (sp->cols - 1) / colwidth;
2220 if ((size_t)argc > numcols) {
2221 numrows = argc / numcols;
2222 if (argc % numcols)
2223 ++numrows;
2224 } else
2225 numrows = 1;
2226
2227 /* Display the files in sorted order. */
2228 for (row = 0; row < numrows; ++row) {
2229 for (base = row, col = 0; col < numcols; ++col) {
2230 INT2CHAR(sp, argv[base]->bp+prefix,
2231 argv[base]->len+1-prefix, np, nlen);
2232 pp = msg_print(sp, np, &nf);
2233 cnt = ex_printf(sp, "%s", pp);
2234 if (nf)
2235 FREE_SPACE(sp, pp, 0);
2236 CHK_INTR;
2237 if ((base += numrows) >= (size_t)argc)
2238 break;
2239 (void)ex_printf(sp,
2240 "%*s", (int)(colwidth - cnt), "");
2241 CHK_INTR;
2242 }
2243 (void)ex_puts(sp, "\n");
2244 CHK_INTR;
2245 }
2246 (void)ex_puts(sp, "\n");
2247 CHK_INTR;
2248 }
2249 (void)ex_fflush(sp);
2250
2251 if (0) {
2252 intr: F_CLR(gp, G_INTERRUPTED);
2253 }
2254 if (reset)
2255 F_SET(sp, SC_TINPUT_INFO);
2256
2257 return (0);
2258 }
2259
2260 /*
2261 * txt_emark --
2262 * Set the end mark on the line.
2263 */
2264 static int
txt_emark(SCR * sp,TEXT * tp,size_t cno)2265 txt_emark(SCR *sp, TEXT *tp, size_t cno)
2266 {
2267 CHAR_T ch;
2268 unsigned char *kp;
2269 size_t chlen, nlen, olen;
2270 CHAR_T *p;
2271
2272 ch = CH_ENDMARK;
2273
2274 /*
2275 * The end mark may not be the same size as the current character.
2276 * Don't let the line shift.
2277 */
2278 nlen = KEY_LEN(sp, ch);
2279 if (tp->lb[cno] == '\t')
2280 (void)vs_columns(sp, tp->lb, tp->lno, &cno, &olen);
2281 else
2282 olen = KEY_LEN(sp, tp->lb[cno]);
2283
2284 /*
2285 * If the line got longer, well, it's weird, but it's easy. If
2286 * it's the same length, it's easy. If it got shorter, we have
2287 * to fix it up.
2288 */
2289 if (olen > nlen) {
2290 BINC_RETW(sp, tp->lb, tp->lb_len, tp->len + olen);
2291 chlen = olen - nlen;
2292 if (tp->insert != 0)
2293 MEMMOVEW(tp->lb + cno + 1 + chlen,
2294 tp->lb + cno + 1, tp->insert);
2295
2296 tp->len += chlen;
2297 tp->owrite += chlen;
2298 p = tp->lb + cno;
2299 if (tp->lb[cno] == '\t')
2300 for (cno += chlen; chlen--;)
2301 *p++ = ' ';
2302 else
2303 for (kp = KEY_NAME(sp, tp->lb[cno]),
2304 cno += chlen; chlen--;)
2305 *p++ = *kp++;
2306 }
2307 tp->lb[cno] = ch;
2308 return (vs_change(sp, tp->lno, LINE_RESET));
2309 }
2310
2311 /*
2312 * txt_err --
2313 * Handle an error during input processing.
2314 */
2315 static void
txt_err(SCR * sp,TEXTH * tiqh)2316 txt_err(SCR *sp, TEXTH *tiqh)
2317 {
2318 db_recno_t lno;
2319
2320 /*
2321 * The problem with input processing is that the cursor is at an
2322 * indeterminate position since some input may have been lost due
2323 * to a malloc error. So, try to go back to the place from which
2324 * the cursor started, knowing that it may no longer be available.
2325 *
2326 * We depend on at least one line number being set in the text
2327 * chain.
2328 */
2329 for (lno = TAILQ_FIRST(tiqh)->lno;
2330 !db_exist(sp, lno) && lno > 0; --lno);
2331
2332 sp->lno = lno == 0 ? 1 : lno;
2333 sp->cno = 0;
2334
2335 /* Redraw the screen, just in case. */
2336 F_SET(sp, SC_SCR_REDRAW);
2337 }
2338
2339 /*
2340 * txt_hex --
2341 * Let the user insert any character value they want.
2342 *
2343 * !!!
2344 * This is an extension. The pattern "^X[0-9a-fA-F]*" is a way
2345 * for the user to specify a character value which their keyboard
2346 * may not be able to enter.
2347 */
2348 static int
txt_hex(SCR * sp,TEXT * tp)2349 txt_hex(SCR *sp, TEXT *tp)
2350 {
2351 CHAR_T savec;
2352 size_t len, off;
2353 long value;
2354 CHAR_T *p, *wp;
2355
2356 /*
2357 * Null-terminate the string. Since nul isn't a legal hex value,
2358 * this should be okay, and lets us use a local routine, which
2359 * presumably understands the character set, to convert the value.
2360 */
2361 savec = tp->lb[tp->cno];
2362 tp->lb[tp->cno] = 0;
2363
2364 /* Find the previous CH_HEX character. */
2365 for (off = tp->cno - 1, p = tp->lb + off, len = 0;; --p, --off, ++len) {
2366 if (*p == CH_HEX) {
2367 wp = p + 1;
2368 break;
2369 }
2370 /* Not on this line? Shouldn't happen. */
2371 if (off == tp->ai || off == tp->offset)
2372 goto nothex;
2373 }
2374
2375 /* If length of 0, then it wasn't a hex value. */
2376 if (len == 0)
2377 goto nothex;
2378
2379 /* Get the value. */
2380 errno = 0;
2381 value = STRTOL(wp, NULL, 16);
2382 if (errno || value < 0 || value > 0xff) {
2383 nothex: tp->lb[tp->cno] = savec;
2384 return (0);
2385 }
2386
2387 /* Restore the original character. */
2388 tp->lb[tp->cno] = savec;
2389
2390 /* Adjust the bookkeeping. */
2391 tp->cno -= len;
2392 tp->len -= len;
2393 tp->lb[tp->cno - 1] = value;
2394
2395 /* Copy down any overwrite characters. */
2396 if (tp->owrite)
2397 MEMMOVEW(tp->lb + tp->cno, tp->lb + tp->cno + len,
2398 tp->owrite);
2399
2400 /* Copy down any insert characters. */
2401 if (tp->insert)
2402 MEMMOVEW(tp->lb + tp->cno + tp->owrite,
2403 tp->lb + tp->cno + tp->owrite + len,
2404 tp->insert);
2405
2406 return (0);
2407 }
2408
2409 /*
2410 * txt_insch --
2411 *
2412 * !!!
2413 * Historic vi did a special screen optimization for tab characters. As an
2414 * example, for the keystrokes "iabcd<esc>0C<tab>", the tab overwrote the
2415 * rest of the string when it was displayed.
2416 *
2417 * Because early versions of this implementation redisplayed the entire line
2418 * on each keystroke, the "bcd" was pushed to the right as it ignored that
2419 * the user had "promised" to change the rest of the characters. However,
2420 * the historic vi implementation had an even worse bug: given the keystrokes
2421 * "iabcd<esc>0R<tab><esc>", the "bcd" disappears, and magically reappears
2422 * on the second <esc> key.
2423 *
2424 * POSIX 1003.2 requires (will require) that this be fixed, specifying that
2425 * vi overwrite characters the user has committed to changing, on the basis
2426 * of the screen space they require, but that it not overwrite other characters.
2427 */
2428 static int
txt_insch(SCR * sp,TEXT * tp,ARG_CHAR_T * chp,u_int flags)2429 txt_insch(SCR *sp, TEXT *tp, ARG_CHAR_T *chp, u_int flags)
2430 {
2431 unsigned char *kp;
2432 CHAR_T savech;
2433 size_t chlen, cno, copydown, olen, nlen;
2434 CHAR_T *p;
2435
2436 /*
2437 * The 'R' command does one-for-one replacement, because there's
2438 * no way to know how many characters the user intends to replace.
2439 */
2440 if (LF_ISSET(TXT_REPLACE)) {
2441 if (tp->owrite) {
2442 --tp->owrite;
2443 tp->lb[tp->cno++] = (UCHAR_T)*chp;
2444 return (0);
2445 }
2446 } else if (tp->owrite) { /* Overwrite a character. */
2447 cno = tp->cno;
2448
2449 /*
2450 * If the old or new characters are tabs, then the length of the
2451 * display depends on the character position in the display. We
2452 * don't even try to handle this here, just ask the screen.
2453 */
2454 if (*chp == '\t') {
2455 savech = tp->lb[cno];
2456 tp->lb[cno] = '\t';
2457 (void)vs_columns(sp, tp->lb, tp->lno, &cno, &nlen);
2458 tp->lb[cno] = savech;
2459 } else
2460 nlen = KEY_LEN(sp, *chp);
2461
2462 /*
2463 * Eat overwrite characters until we run out of them or we've
2464 * handled the length of the new character. If we only eat
2465 * part of an overwrite character, break it into its component
2466 * elements and display the remaining components.
2467 */
2468 for (copydown = 0; nlen != 0 && tp->owrite != 0;) {
2469 --tp->owrite;
2470
2471 if (tp->lb[cno] == '\t')
2472 (void)vs_columns(sp,
2473 tp->lb, tp->lno, &cno, &olen);
2474 else
2475 olen = KEY_LEN(sp, tp->lb[cno]);
2476
2477 if (olen == nlen) {
2478 nlen = 0;
2479 break;
2480 }
2481 if (olen < nlen) {
2482 ++copydown;
2483 nlen -= olen;
2484 } else {
2485 BINC_RETW(sp,
2486 tp->lb, tp->lb_len, tp->len + olen);
2487 chlen = olen - nlen;
2488 MEMMOVEW(tp->lb + cno + 1 + chlen,
2489 tp->lb + cno + 1,
2490 tp->owrite + tp->insert);
2491
2492 tp->len += chlen;
2493 tp->owrite += chlen;
2494 if (tp->lb[cno] == '\t')
2495 for (p = tp->lb + cno + 1; chlen--;)
2496 *p++ = ' ';
2497 else
2498 for (kp =
2499 KEY_NAME(sp, tp->lb[cno]) + nlen,
2500 p = tp->lb + cno + 1; chlen--;)
2501 *p++ = *kp++;
2502 nlen = 0;
2503 break;
2504 }
2505 }
2506
2507 /*
2508 * If had to erase several characters, we adjust the total
2509 * count, and if there are any characters left, shift them
2510 * into position.
2511 */
2512 if (copydown != 0 && (tp->len -= copydown) != 0)
2513 MEMMOVEW(tp->lb + cno, tp->lb + cno + copydown,
2514 tp->owrite + tp->insert + copydown);
2515
2516 /* If we had enough overwrite characters, we're done. */
2517 if (nlen == 0) {
2518 tp->lb[tp->cno++] = (UCHAR_T)*chp;
2519 return (0);
2520 }
2521 }
2522
2523 /* Check to see if the character fits into the input buffer. */
2524 BINC_RETW(sp, tp->lb, tp->lb_len, tp->len + 1);
2525
2526 ++tp->len;
2527 if (tp->insert) { /* Insert a character. */
2528 if (tp->insert == 1)
2529 tp->lb[tp->cno + 1] = tp->lb[tp->cno];
2530 else
2531 MEMMOVEW(tp->lb + tp->cno + 1,
2532 tp->lb + tp->cno, tp->owrite + tp->insert);
2533 }
2534 tp->lb[tp->cno++] = (UCHAR_T)*chp;
2535 return (0);
2536 }
2537
2538 /*
2539 * txt_isrch --
2540 * Do an incremental search.
2541 */
2542 static int
txt_isrch(SCR * sp,VICMD * vp,TEXT * tp,u_int8_t * is_flagsp)2543 txt_isrch(SCR *sp, VICMD *vp, TEXT *tp, u_int8_t *is_flagsp)
2544 {
2545 MARK start;
2546 db_recno_t lno;
2547 u_int sf;
2548
2549 /* If it's a one-line screen, we don't do incrementals. */
2550 if (IS_ONELINE(sp)) {
2551 FL_CLR(*is_flagsp, IS_RUNNING);
2552 return (0);
2553 }
2554
2555 /*
2556 * If the user erases back to the beginning of the buffer, there's
2557 * nothing to search for. Reset the cursor to the starting point.
2558 */
2559 if (tp->cno <= 1) {
2560 vp->m_final = vp->m_start;
2561 return (0);
2562 }
2563
2564 /*
2565 * If it's an RE quote character, and not quoted, ignore it until
2566 * we get another character.
2567 */
2568 if (tp->lb[tp->cno - 1] == '\\' &&
2569 (tp->cno == 2 || tp->lb[tp->cno - 2] != '\\'))
2570 return (0);
2571
2572 /*
2573 * If it's a magic shell character, and not quoted, reset the cursor
2574 * to the starting point.
2575 */
2576 if (strchr(O_STR(sp, O_SHELLMETA), tp->lb[tp->cno - 1]) != NULL &&
2577 (tp->cno == 2 || tp->lb[tp->cno - 2] != '\\'))
2578 vp->m_final = vp->m_start;
2579
2580 /*
2581 * If we see the search pattern termination character, then quit doing
2582 * an incremental search. There may be more, e.g., ":/foo/;/bar/",
2583 * and we can't handle that incrementally. Also, reset the cursor to
2584 * the original location, the ex search routines don't know anything
2585 * about incremental searches.
2586 */
2587 if (tp->lb[0] == tp->lb[tp->cno - 1] &&
2588 (tp->cno == 2 || tp->lb[tp->cno - 2] != '\\')) {
2589 vp->m_final = vp->m_start;
2590 FL_CLR(*is_flagsp, IS_RUNNING);
2591 return (0);
2592 }
2593
2594 /*
2595 * Remember the input line and discard the special input map,
2596 * but don't overwrite the input line on the screen.
2597 */
2598 lno = tp->lno;
2599 F_SET(VIP(sp), VIP_S_MODELINE);
2600 F_CLR(sp, SC_TINPUT | SC_TINPUT_INFO);
2601 if (txt_map_end(sp))
2602 return (1);
2603
2604 /*
2605 * Specify a starting point and search. If we find a match, move to
2606 * it and refresh the screen. If we didn't find the match, then we
2607 * beep the screen. When searching from the original cursor position,
2608 * we have to move the cursor, otherwise, we don't want to move the
2609 * cursor in case the text at the current position continues to match.
2610 */
2611 if (FL_ISSET(*is_flagsp, IS_RESTART)) {
2612 start = vp->m_start;
2613 sf = SEARCH_SET;
2614 } else {
2615 start = vp->m_final;
2616 sf = SEARCH_INCR | SEARCH_SET;
2617 }
2618
2619 if (tp->lb[0] == '/' ?
2620 !f_search(sp,
2621 &start, &vp->m_final, tp->lb + 1, tp->cno - 1, NULL, sf) :
2622 !b_search(sp,
2623 &start, &vp->m_final, tp->lb + 1, tp->cno - 1, NULL, sf)) {
2624 sp->lno = vp->m_final.lno;
2625 sp->cno = vp->m_final.cno;
2626 FL_CLR(*is_flagsp, IS_RESTART);
2627
2628 if (!KEYS_WAITING(sp) && vs_refresh(sp, 0))
2629 return (1);
2630 } else
2631 FL_SET(*is_flagsp, IS_RESTART);
2632
2633 /* Reinstantiate the special input map. */
2634 if (txt_map_init(sp))
2635 return (1);
2636 F_CLR(VIP(sp), VIP_S_MODELINE);
2637 F_SET(sp, SC_TINPUT | SC_TINPUT_INFO);
2638
2639 /* Reset the line number of the input line. */
2640 tp->lno = TMAP[0].lno;
2641
2642 /*
2643 * If the colon command-line moved, i.e. the screen scrolled,
2644 * refresh the input line.
2645 *
2646 * XXX
2647 * We shouldn't be calling vs_line, here -- we need dirty bits
2648 * on entries in the SMAP array.
2649 */
2650 if (lno != TMAP[0].lno) {
2651 if (vs_line(sp, &TMAP[0], NULL, NULL))
2652 return (1);
2653 (void)sp->gp->scr_refresh(sp, 0);
2654 }
2655 return (0);
2656 }
2657
2658 /*
2659 * txt_resolve --
2660 * Resolve the input text chain into the file.
2661 */
2662 static int
txt_resolve(SCR * sp,TEXTH * tiqh,u_int32_t flags)2663 txt_resolve(SCR *sp, TEXTH *tiqh, u_int32_t flags)
2664 {
2665 TEXT *tp;
2666 db_recno_t lno;
2667 int changed;
2668
2669 /*
2670 * The first line replaces a current line, and all subsequent lines
2671 * are appended into the file. Resolve autoindented characters for
2672 * each line before committing it. If the latter causes the line to
2673 * change, we have to redisplay it, otherwise the information cached
2674 * about the line will be wrong.
2675 */
2676 tp = TAILQ_FIRST(tiqh);
2677
2678 if (LF_ISSET(TXT_AUTOINDENT))
2679 txt_ai_resolve(sp, tp, &changed);
2680 else
2681 changed = 0;
2682 if (db_set(sp, tp->lno, tp->lb, tp->len) ||
2683 (changed && vs_change(sp, tp->lno, LINE_RESET)))
2684 return (1);
2685
2686 for (lno = tp->lno; (tp = TAILQ_NEXT(tp, q)) != NULL; ++lno) {
2687 if (LF_ISSET(TXT_AUTOINDENT))
2688 txt_ai_resolve(sp, tp, &changed);
2689 else
2690 changed = 0;
2691 if (db_append(sp, 0, lno, tp->lb, tp->len) ||
2692 (changed && vs_change(sp, tp->lno, LINE_RESET)))
2693 return (1);
2694 }
2695
2696 /*
2697 * Clear the input flag, the look-aside buffer is no longer valid.
2698 * Has to be done as part of text resolution, or upon return we'll
2699 * be looking at incorrect data.
2700 */
2701 F_CLR(sp, SC_TINPUT);
2702
2703 return (0);
2704 }
2705
2706 /*
2707 * txt_showmatch --
2708 * Show a character match.
2709 *
2710 * !!!
2711 * Historic vi tried to display matches even in the :colon command line.
2712 * I think not.
2713 */
2714 static int
txt_showmatch(SCR * sp,TEXT * tp)2715 txt_showmatch(SCR *sp, TEXT *tp)
2716 {
2717 VCS cs;
2718 MARK m;
2719 int cnt, endc, startc;
2720
2721 /*
2722 * Do a refresh first, in case we haven't done one in awhile,
2723 * so the user can see what we're complaining about.
2724 */
2725 UPDATE_POSITION(sp, tp);
2726 if (vs_refresh(sp, 1))
2727 return (1);
2728
2729 /*
2730 * We don't display the match if it's not on the screen. Find
2731 * out what the first character on the screen is.
2732 */
2733 if (vs_sm_position(sp, &m, 0, P_TOP))
2734 return (1);
2735
2736 /* Initialize the getc() interface. */
2737 cs.cs_lno = tp->lno;
2738 cs.cs_cno = tp->cno - 1;
2739 if (cs_init(sp, &cs))
2740 return (1);
2741 startc = (endc = cs.cs_ch) == ')' ? '(' : '{';
2742
2743 /* Search for the match. */
2744 for (cnt = 1;;) {
2745 if (cs_prev(sp, &cs))
2746 return (1);
2747 if (cs.cs_flags != 0) {
2748 if (cs.cs_flags == CS_EOF || cs.cs_flags == CS_SOF) {
2749 msgq(sp, M_BERR,
2750 "Unmatched %s", KEY_NAME(sp, endc));
2751 return (0);
2752 }
2753 continue;
2754 }
2755 if (cs.cs_ch == endc)
2756 ++cnt;
2757 else if (cs.cs_ch == startc && --cnt == 0)
2758 break;
2759 }
2760
2761 /* If the match is on the screen, move to it. */
2762 if (cs.cs_lno < m.lno || (cs.cs_lno == m.lno && cs.cs_cno < m.cno))
2763 return (0);
2764 sp->lno = cs.cs_lno;
2765 sp->cno = cs.cs_cno;
2766 if (vs_refresh(sp, 1))
2767 return (1);
2768
2769 /* Wait for timeout or character arrival. */
2770 return (v_event_get(sp,
2771 NULL, O_VAL(sp, O_MATCHTIME) * 100, EC_TIMEOUT));
2772 }
2773
2774 /*
2775 * txt_margin --
2776 * Handle margin wrap.
2777 */
2778 static int
txt_margin(SCR * sp,TEXT * tp,TEXT * wmtp,int * didbreak,u_int32_t flags)2779 txt_margin(SCR *sp, TEXT *tp, TEXT *wmtp, int *didbreak, u_int32_t flags)
2780 {
2781 size_t len, off;
2782 CHAR_T *p;
2783
2784 /* Find the nearest previous blank. */
2785 for (off = tp->cno - 1, p = tp->lb + off, len = 0;; --off, --p, ++len) {
2786 if (ISBLANK((UCHAR_T)*p)) {
2787 break;
2788 }
2789
2790 /*
2791 * If reach the start of the line, there's nowhere to break.
2792 *
2793 * !!!
2794 * Historic vi belled each time a character was entered after
2795 * crossing the margin until a space was entered which could
2796 * be used to break the line. I don't as it tends to wake the
2797 * cats.
2798 */
2799 if (off == tp->ai || off == tp->offset) {
2800 *didbreak = 0;
2801 return (0);
2802 }
2803 }
2804
2805 /*
2806 * Store saved information about the rest of the line in the
2807 * wrapmargin TEXT structure.
2808 *
2809 * !!!
2810 * The offset field holds the length of the current characters
2811 * that the user entered, but which are getting split to the new
2812 * line -- it's going to be used to set the cursor value when we
2813 * move to the new line.
2814 */
2815 wmtp->lb = p + 1;
2816 wmtp->offset = len;
2817 wmtp->insert = LF_ISSET(TXT_APPENDEOL) ? tp->insert - 1 : tp->insert;
2818 wmtp->owrite = tp->owrite;
2819
2820 /* Correct current bookkeeping information. */
2821 tp->cno -= len;
2822 if (LF_ISSET(TXT_APPENDEOL)) {
2823 tp->len -= len + tp->owrite + (tp->insert - 1);
2824 tp->insert = 1;
2825 } else {
2826 tp->len -= len + tp->owrite + tp->insert;
2827 tp->insert = 0;
2828 }
2829 tp->owrite = 0;
2830
2831 /*
2832 * !!!
2833 * Delete any trailing whitespace from the current line.
2834 */
2835 for (;; --p, --off) {
2836 if (!ISBLANK((UCHAR_T)*p))
2837 break;
2838 --tp->cno;
2839 --tp->len;
2840 if (off == tp->ai || off == tp->offset)
2841 break;
2842 }
2843 *didbreak = 1;
2844 return (0);
2845 }
2846
2847 /*
2848 * txt_Rresolve --
2849 * Resolve the input line for the 'R' command.
2850 */
2851 static void
txt_Rresolve(SCR * sp,TEXTH * tiqh,TEXT * tp,const size_t orig_len)2852 txt_Rresolve(SCR *sp, TEXTH *tiqh, TEXT *tp, const size_t orig_len)
2853 {
2854 TEXT *ttp;
2855 size_t input_len, retain;
2856 CHAR_T *p;
2857
2858 /*
2859 * Check to make sure that the cursor hasn't moved beyond
2860 * the end of the line.
2861 */
2862 if (tp->owrite == 0)
2863 return;
2864
2865 /*
2866 * Calculate how many characters the user has entered,
2867 * plus the blanks erased by <carriage-return>/<newline>s.
2868 */
2869 for (ttp = TAILQ_FIRST(tiqh), input_len = 0;;) {
2870 input_len += ttp == tp ? tp->cno : ttp->len + ttp->R_erase;
2871 if ((ttp = TAILQ_NEXT(ttp, q)) == NULL)
2872 break;
2873 }
2874
2875 /*
2876 * If the user has entered less characters than the original line
2877 * was long, restore any overwriteable characters to the original
2878 * characters. These characters are entered as "insert characters",
2879 * because they're after the cursor and we don't want to lose them.
2880 * (This is okay because the R command has no insert characters.)
2881 * We set owrite to 0 so that the insert characters don't get copied
2882 * to somewhere else, which means that the line and the length have
2883 * to be adjusted here as well.
2884 *
2885 * We have to retrieve the original line because the original pinned
2886 * page has long since been discarded. If it doesn't exist, that's
2887 * okay, the user just extended the file.
2888 */
2889 if (input_len < orig_len) {
2890 retain = MIN(tp->owrite, orig_len - input_len);
2891 if (db_get(sp,
2892 TAILQ_FIRST(tiqh)->lno, DBG_FATAL | DBG_NOCACHE, &p, NULL))
2893 return;
2894 MEMCPYW(tp->lb + tp->cno, p + input_len, retain);
2895 tp->len -= tp->owrite - retain;
2896 tp->owrite = 0;
2897 tp->insert += retain;
2898 }
2899 }
2900
2901 /*
2902 * txt_nomorech --
2903 * No more characters message.
2904 */
2905 static void
txt_nomorech(SCR * sp)2906 txt_nomorech(SCR *sp)
2907 {
2908 msgq(sp, M_BERR, "194|No more characters to erase");
2909 }
2910