2 * Copyright (c) 1992, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 * Copyright (c) 1992, 1993, 1994, 1995, 1996
5 * Keith Bostic. All rights reserved.
7 * See the LICENSE file for redistribution information.
13 static const char sccsid[] = "$Id: v_itxt.c,v 10.21 2001/06/25 15:19:32 skimo Exp $";
16 #include <sys/types.h>
17 #include <sys/queue.h>
20 #include <bitstring.h>
28 #include "../common/common.h"
33 * Repeated input in the historic vi is mostly wrong and this isn't very
34 * backward compatible. For example, if the user entered "3Aab\ncd" in
35 * the historic vi, the "ab" was repeated 3 times, and the "\ncd" was then
36 * appended to the result. There was also a hack which I don't remember
37 * right now, where "3o" would open 3 lines and then let the user fill them
38 * in, to make screen movements on 300 baud modems more tolerable. I don't
39 * think it's going to be missed.
42 * There's a problem with the way that we do logging for change commands with
43 * implied motions (e.g. A, I, O, cc, etc.). Since the main vi loop logs the
44 * starting cursor position before the change command "moves" the cursor, the
45 * cursor position to which we return on undo will be where the user entered
46 * the change command, not the start of the change. Several of the following
47 * routines re-log the cursor to make this work correctly. Historic vi tried
48 * to do the same thing, and mostly got it right. (The only spectacular way
49 * it fails is if the user entered 'o' from anywhere but the last character of
50 * the line, the undo returned the cursor to the start of the line. If the
51 * user was on the last character of the line, the cursor returned to that
52 * position.) We also check for mapped keys waiting, i.e. if we're in the
53 * middle of a map, don't bother logging the cursor.
55 #define LOG_CORRECT { \
56 if (!MAPPED_KEYS_WAITING(sp)) \
57 (void)log_cursor(sp); \
60 static u_int32_t set_txt_std __P((SCR *, VICMD *, u_int32_t));
64 * Append text to the end of the line.
66 * PUBLIC: int v_iA __P((SCR *, VICMD *));
69 v_iA(SCR *sp, VICMD *vp)
73 if (!db_get(sp, vp->m_start.lno, 0, NULL, &len))
74 sp->cno = len == 0 ? 0 : len - 1;
78 return (v_ia(sp, vp));
84 * Append text to the cursor position.
86 * PUBLIC: int v_ia __P((SCR *, VICMD *));
89 v_ia(SCR *sp, VICMD *vp)
96 flags = set_txt_std(sp, vp, 0);
97 sp->showmode = SM_APPEND;
98 sp->lno = vp->m_start.lno;
100 /* Move the cursor one column to the right and repaint the screen. */
101 if (db_eget(sp, sp->lno, &p, &len, &isempty)) {
105 LF_SET(TXT_APPENDEOL);
107 if (len == sp->cno + 1) {
109 LF_SET(TXT_APPENDEOL);
113 LF_SET(TXT_APPENDEOL);
115 return (v_txt(sp, vp, NULL, p, len,
116 0, OOBLNO, F_ISSET(vp, VC_C1SET) ? vp->count : 1, flags));
121 * Insert text at the first nonblank.
123 * PUBLIC: int v_iI __P((SCR *, VICMD *));
126 v_iI(SCR *sp, VICMD *vp)
129 if (nonblank(sp, vp->m_start.lno, &sp->cno))
134 return (v_ii(sp, vp));
140 * Insert text at the cursor position.
142 * PUBLIC: int v_ii __P((SCR *, VICMD *));
145 v_ii(SCR *sp, VICMD *vp)
152 flags = set_txt_std(sp, vp, 0);
153 sp->showmode = SM_INSERT;
154 sp->lno = vp->m_start.lno;
156 if (db_eget(sp, sp->lno, &p, &len, &isempty)) {
163 LF_SET(TXT_APPENDEOL);
164 return (v_txt(sp, vp, NULL, p, len,
165 0, OOBLNO, F_ISSET(vp, VC_C1SET) ? vp->count : 1, flags));
168 enum which { o_cmd, O_cmd };
169 static int io __P((SCR *, VICMD *, enum which));
173 * Insert text above this line.
175 * PUBLIC: int v_iO __P((SCR *, VICMD *));
178 v_iO(SCR *sp, VICMD *vp)
180 return (io(sp, vp, O_cmd));
185 * Insert text after this line.
187 * PUBLIC: int v_io __P((SCR *, VICMD *));
190 v_io(SCR *sp, VICMD *vp)
192 return (io(sp, vp, o_cmd));
196 io(SCR *sp, VICMD *vp, enum which cmd)
198 recno_t ai_line, lno;
203 flags = set_txt_std(sp, vp, TXT_ADDNEWLINE | TXT_APPENDEOL);
204 sp->showmode = SM_INSERT;
207 if (db_last(sp, &lno))
220 if (db_insert(sp, sp->lno, p, 0))
222 if (db_get(sp, sp->lno, DBG_FATAL, &p, &len))
224 ai_line = sp->lno + 1;
226 if (db_append(sp, 1, sp->lno, p, 0))
228 if (db_get(sp, ++sp->lno, DBG_FATAL, &p, &len))
230 ai_line = sp->lno - 1;
233 return (v_txt(sp, vp, NULL, p, len,
234 0, ai_line, F_ISSET(vp, VC_C1SET) ? vp->count : 1, flags));
238 * v_change -- [buffer][count]c[count]motion
243 * PUBLIC: int v_change __P((SCR *, VICMD *));
246 v_change(SCR *sp, VICMD *vp)
250 int isempty, lmode, rval;
255 * 'c' can be combined with motion commands that set the resulting
256 * cursor position, i.e. "cG". Clear the VM_RCM flags and make the
257 * resulting cursor position stick, inserting text has its own rules
258 * for cursor positioning.
260 F_CLR(vp, VM_RCM_MASK);
261 F_SET(vp, VM_RCM_SET);
264 * Find out if the file is empty, it's easier to handle it as a
267 if (vp->m_start.lno == vp->m_stop.lno &&
268 db_eget(sp, vp->m_start.lno, &p, &len, &isempty)) {
271 return (v_ia(sp, vp));
274 flags = set_txt_std(sp, vp, 0);
275 sp->showmode = SM_CHANGE;
278 * Move the cursor to the start of the change. Note, if autoindent
279 * is turned on, the cc command in line mode changes from the first
280 * *non-blank* character of the line, not the first character. And,
281 * to make it just a bit more exciting, the initial space is handled
282 * as auto-indent characters.
284 lmode = F_ISSET(vp, VM_LMODE) ? CUT_LINEMODE : 0;
287 if (O_ISSET(sp, O_AUTOINDENT)) {
288 if (nonblank(sp, vp->m_start.lno, &vp->m_start.cno))
293 sp->lno = vp->m_start.lno;
294 sp->cno = vp->m_start.cno;
299 * If not in line mode and changing within a single line, copy the
300 * text and overwrite it.
302 if (!lmode && vp->m_start.lno == vp->m_stop.lno) {
305 * Historic practice, c did not cut into the numeric buffers,
306 * only the unnamed one.
309 F_ISSET(vp, VC_BUFFER) ? &vp->buffer : NULL,
310 &vp->m_start, &vp->m_stop, lmode))
313 LF_SET(TXT_APPENDEOL);
314 LF_SET(TXT_EMARK | TXT_OVERWRITE);
315 return (v_txt(sp, vp, &vp->m_stop, p, len,
316 0, OOBLNO, F_ISSET(vp, VC_C1SET) ? vp->count : 1, flags));
320 * It's trickier if in line mode or changing over multiple lines. If
321 * we're in line mode delete all of the lines and insert a replacement
322 * line which the user edits. If there was leading whitespace in the
323 * first line being changed, we copy it and use it as the replacement.
324 * If we're not in line mode, we delete the text and start inserting.
327 * Copy the text. Historic practice, c did not cut into the numeric
328 * buffers, only the unnamed one.
331 F_ISSET(vp, VC_BUFFER) ? &vp->buffer : NULL,
332 &vp->m_start, &vp->m_stop, lmode))
335 /* If replacing entire lines and there's leading text. */
336 if (lmode && vp->m_start.cno) {
338 * Get a copy of the first line changed, and copy out the
341 if (db_get(sp, vp->m_start.lno, DBG_FATAL, &p, &len))
343 GET_SPACE_RETW(sp, bp, blen, vp->m_start.cno);
344 MEMMOVE(bp, p, vp->m_start.cno);
348 /* Delete the text. */
349 if (del(sp, &vp->m_start, &vp->m_stop, lmode))
352 /* If replacing entire lines, insert a replacement line. */
354 if (db_insert(sp, vp->m_start.lno, bp, vp->m_start.cno))
356 sp->lno = vp->m_start.lno;
357 len = sp->cno = vp->m_start.cno;
360 /* Get the line we're editing. */
361 if (db_eget(sp, vp->m_start.lno, &p, &len, &isempty)) {
367 /* Check to see if we're appending to the line. */
368 if (vp->m_start.cno >= len)
369 LF_SET(TXT_APPENDEOL);
371 rval = v_txt(sp, vp, NULL, p, len,
372 0, OOBLNO, F_ISSET(vp, VC_C1SET) ? vp->count : 1, flags);
375 FREE_SPACEW(sp, bp, blen);
380 * v_Replace -- [count]R
381 * Overwrite multiple characters.
383 * PUBLIC: int v_Replace __P((SCR *, VICMD *));
386 v_Replace(SCR *sp, VICMD *vp)
393 flags = set_txt_std(sp, vp, 0);
394 sp->showmode = SM_REPLACE;
396 if (db_eget(sp, vp->m_start.lno, &p, &len, &isempty)) {
400 LF_SET(TXT_APPENDEOL);
403 LF_SET(TXT_APPENDEOL);
404 LF_SET(TXT_OVERWRITE | TXT_REPLACE);
406 vp->m_stop.lno = vp->m_start.lno;
407 vp->m_stop.cno = len ? len - 1 : 0;
409 return (v_txt(sp, vp, &vp->m_stop, p, len,
410 0, OOBLNO, F_ISSET(vp, VC_C1SET) ? vp->count : 1, flags));
414 * v_subst -- [buffer][count]s
415 * Substitute characters.
417 * PUBLIC: int v_subst __P((SCR *, VICMD *));
420 v_subst(SCR *sp, VICMD *vp)
427 flags = set_txt_std(sp, vp, 0);
428 sp->showmode = SM_CHANGE;
430 if (db_eget(sp, vp->m_start.lno, &p, &len, &isempty)) {
434 LF_SET(TXT_APPENDEOL);
437 LF_SET(TXT_APPENDEOL);
438 LF_SET(TXT_EMARK | TXT_OVERWRITE);
441 vp->m_stop.lno = vp->m_start.lno;
443 vp->m_start.cno + (F_ISSET(vp, VC_C1SET) ? vp->count - 1 : 0);
444 if (vp->m_stop.cno > len - 1)
445 vp->m_stop.cno = len - 1;
447 if (p != NULL && cut(sp,
448 F_ISSET(vp, VC_BUFFER) ? &vp->buffer : NULL,
449 &vp->m_start, &vp->m_stop, 0))
452 return (v_txt(sp, vp, &vp->m_stop, p, len, 0, OOBLNO, 1, flags));
457 * Initialize text processing flags.
460 set_txt_std(SCR *sp, VICMD *vp, u_int32_t flags)
463 TXT_ESCAPE | TXT_MAPINPUT | TXT_RECORD | TXT_RESOLVE);
465 if (F_ISSET(vp, VC_ISDOT))
468 if (O_ISSET(sp, O_ALTWERASE))
469 LF_SET(TXT_ALTWERASE);
470 if (O_ISSET(sp, O_AUTOINDENT))
471 LF_SET(TXT_AUTOINDENT);
472 if (O_ISSET(sp, O_BEAUTIFY))
473 LF_SET(TXT_BEAUTIFY);
474 if (O_ISSET(sp, O_SHOWMATCH))
475 LF_SET(TXT_SHOWMATCH);
476 if (F_ISSET(sp, SC_SCRIPT))
478 if (O_ISSET(sp, O_TTYWERASE))
479 LF_SET(TXT_TTYWERASE);
483 * Mapped keys were sometimes unaffected by the wrapmargin option
484 * in the historic 4BSD vi. Consider the following commands, where
485 * each is executed on an empty line, in an 80 column screen, with
486 * the wrapmargin value set to 60.
489 * :map K aABC DEF ^V<ESC><CR>KKKKK
490 * :map K 5aABC DEF ^V<ESC><CR>K
492 * The first and second commands are affected by wrapmargin. The
493 * third is not. (If the inserted text is itself longer than the
494 * wrapmargin value, i.e. if the "ABC DEF " string is replaced by
495 * something that's longer than 60 columns from the beginning of
496 * the line, the first two commands behave as before, but the third
497 * command gets fairly strange.) The problem is that people wrote
498 * macros that depended on the third command NOT being affected by
499 * wrapmargin, as in this gem which centers lines:
501 * map #c $mq81a ^V^[81^V^V|D`qld0:s/ / /g^V^M$p
503 * For compatibility reasons, we try and make it all work here. I
504 * offer no hope that this is right, but it's probably pretty close.
507 * Once I work my courage up, this is all gonna go away. It's too
510 if ((O_ISSET(sp, O_WRAPLEN) || O_ISSET(sp, O_WRAPMARGIN)) &&
511 (!MAPPED_KEYS_WAITING(sp) || !F_ISSET(vp, VC_C1SET)))
512 LF_SET(TXT_WRAPMARGIN);