2 * Copyright (c) 1992, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 * Copyright (c) 1992, 1993, 1994, 1995, 1996
5 * Keith Bostic. All rights reserved.
7 * See the LICENSE file for redistribution information.
12 #include <sys/types.h>
13 #include <sys/queue.h>
16 #include <bitstring.h>
24 #include "../common/common.h"
29 * Repeated input in the historic vi is mostly wrong and this isn't very
30 * backward compatible. For example, if the user entered "3Aab\ncd" in
31 * the historic vi, the "ab" was repeated 3 times, and the "\ncd" was then
32 * appended to the result. There was also a hack which I don't remember
33 * right now, where "3o" would open 3 lines and then let the user fill them
34 * in, to make screen movements on 300 baud modems more tolerable. I don't
35 * think it's going to be missed.
38 * There's a problem with the way that we do logging for change commands with
39 * implied motions (e.g. A, I, O, cc, etc.). Since the main vi loop logs the
40 * starting cursor position before the change command "moves" the cursor, the
41 * cursor position to which we return on undo will be where the user entered
42 * the change command, not the start of the change. Several of the following
43 * routines re-log the cursor to make this work correctly. Historic vi tried
44 * to do the same thing, and mostly got it right. (The only spectacular way
45 * it fails is if the user entered 'o' from anywhere but the last character of
46 * the line, the undo returned the cursor to the start of the line. If the
47 * user was on the last character of the line, the cursor returned to that
48 * position.) We also check for mapped keys waiting, i.e. if we're in the
49 * middle of a map, don't bother logging the cursor.
51 #define LOG_CORRECT { \
52 if (!MAPPED_KEYS_WAITING(sp)) \
53 (void)log_cursor(sp); \
56 static u_int32_t set_txt_std(SCR *, VICMD *, u_int32_t);
60 * Append text to the end of the line.
62 * PUBLIC: int v_iA(SCR *, VICMD *);
65 v_iA(SCR *sp, VICMD *vp)
69 if (!db_get(sp, vp->m_start.lno, 0, NULL, &len))
70 sp->cno = len == 0 ? 0 : len - 1;
74 return (v_ia(sp, vp));
80 * Append text to the cursor position.
82 * PUBLIC: int v_ia(SCR *, VICMD *);
85 v_ia(SCR *sp, VICMD *vp)
92 flags = set_txt_std(sp, vp, 0);
93 sp->showmode = SM_APPEND;
94 sp->lno = vp->m_start.lno;
96 /* Move the cursor one column to the right and repaint the screen. */
97 if (db_eget(sp, sp->lno, &p, &len, &isempty)) {
101 LF_SET(TXT_APPENDEOL);
103 if (len == sp->cno + 1) {
105 LF_SET(TXT_APPENDEOL);
109 LF_SET(TXT_APPENDEOL);
111 return (v_txt(sp, vp, NULL, p, len,
112 0, OOBLNO, F_ISSET(vp, VC_C1SET) ? vp->count : 1, flags));
117 * Insert text at the first nonblank.
119 * PUBLIC: int v_iI(SCR *, VICMD *);
122 v_iI(SCR *sp, VICMD *vp)
125 if (nonblank(sp, vp->m_start.lno, &sp->cno))
130 return (v_ii(sp, vp));
136 * Insert text at the cursor position.
138 * PUBLIC: int v_ii(SCR *, VICMD *);
141 v_ii(SCR *sp, VICMD *vp)
148 flags = set_txt_std(sp, vp, 0);
149 sp->showmode = SM_INSERT;
150 sp->lno = vp->m_start.lno;
152 if (db_eget(sp, sp->lno, &p, &len, &isempty)) {
159 LF_SET(TXT_APPENDEOL);
160 return (v_txt(sp, vp, NULL, p, len,
161 0, OOBLNO, F_ISSET(vp, VC_C1SET) ? vp->count : 1, flags));
164 enum which { o_cmd, O_cmd };
165 static int io(SCR *, VICMD *, enum which);
169 * Insert text above this line.
171 * PUBLIC: int v_iO(SCR *, VICMD *);
174 v_iO(SCR *sp, VICMD *vp)
176 return (io(sp, vp, O_cmd));
181 * Insert text after this line.
183 * PUBLIC: int v_io(SCR *, VICMD *);
186 v_io(SCR *sp, VICMD *vp)
188 return (io(sp, vp, o_cmd));
192 io(SCR *sp, VICMD *vp, enum which cmd)
194 recno_t ai_line, lno;
199 flags = set_txt_std(sp, vp, TXT_ADDNEWLINE | TXT_APPENDEOL);
200 sp->showmode = SM_INSERT;
203 if (db_last(sp, &lno))
216 if (db_insert(sp, sp->lno, p, 0))
218 if (db_get(sp, sp->lno, DBG_FATAL, &p, &len))
220 ai_line = sp->lno + 1;
222 if (db_append(sp, 1, sp->lno, p, 0))
224 if (db_get(sp, ++sp->lno, DBG_FATAL, &p, &len))
226 ai_line = sp->lno - 1;
229 return (v_txt(sp, vp, NULL, p, len,
230 0, ai_line, F_ISSET(vp, VC_C1SET) ? vp->count : 1, flags));
234 * v_change -- [buffer][count]c[count]motion
239 * PUBLIC: int v_change(SCR *, VICMD *);
242 v_change(SCR *sp, VICMD *vp)
246 int isempty, lmode, rval;
251 * 'c' can be combined with motion commands that set the resulting
252 * cursor position, i.e. "cG". Clear the VM_RCM flags and make the
253 * resulting cursor position stick, inserting text has its own rules
254 * for cursor positioning.
256 F_CLR(vp, VM_RCM_MASK);
257 F_SET(vp, VM_RCM_SET);
260 * Find out if the file is empty, it's easier to handle it as a
263 if (vp->m_start.lno == vp->m_stop.lno &&
264 db_eget(sp, vp->m_start.lno, &p, &len, &isempty)) {
267 return (v_ia(sp, vp));
270 flags = set_txt_std(sp, vp, 0);
271 sp->showmode = SM_CHANGE;
274 * Move the cursor to the start of the change. Note, if autoindent
275 * is turned on, the cc command in line mode changes from the first
276 * *non-blank* character of the line, not the first character. And,
277 * to make it just a bit more exciting, the initial space is handled
278 * as auto-indent characters.
280 lmode = F_ISSET(vp, VM_LMODE) ? CUT_LINEMODE : 0;
283 if (O_ISSET(sp, O_AUTOINDENT)) {
284 if (nonblank(sp, vp->m_start.lno, &vp->m_start.cno))
289 sp->lno = vp->m_start.lno;
290 sp->cno = vp->m_start.cno;
295 * If not in line mode and changing within a single line, copy the
296 * text and overwrite it.
298 if (!lmode && vp->m_start.lno == vp->m_stop.lno) {
301 * Historic practice, c did not cut into the numeric buffers,
302 * only the unnamed one.
305 F_ISSET(vp, VC_BUFFER) ? &vp->buffer : NULL,
306 &vp->m_start, &vp->m_stop, lmode))
309 LF_SET(TXT_APPENDEOL);
310 LF_SET(TXT_EMARK | TXT_OVERWRITE);
311 return (v_txt(sp, vp, &vp->m_stop, p, len,
312 0, OOBLNO, F_ISSET(vp, VC_C1SET) ? vp->count : 1, flags));
316 * It's trickier if in line mode or changing over multiple lines. If
317 * we're in line mode delete all of the lines and insert a replacement
318 * line which the user edits. If there was leading whitespace in the
319 * first line being changed, we copy it and use it as the replacement.
320 * If we're not in line mode, we delete the text and start inserting.
323 * Copy the text. Historic practice, c did not cut into the numeric
324 * buffers, only the unnamed one.
327 F_ISSET(vp, VC_BUFFER) ? &vp->buffer : NULL,
328 &vp->m_start, &vp->m_stop, lmode))
331 /* If replacing entire lines and there's leading text. */
332 if (lmode && vp->m_start.cno) {
334 * Get a copy of the first line changed, and copy out the
337 if (db_get(sp, vp->m_start.lno, DBG_FATAL, &p, &len))
339 GET_SPACE_RETW(sp, bp, blen, vp->m_start.cno);
340 MEMMOVE(bp, p, vp->m_start.cno);
344 /* Delete the text. */
345 if (del(sp, &vp->m_start, &vp->m_stop, lmode))
348 /* If replacing entire lines, insert a replacement line. */
350 if (db_insert(sp, vp->m_start.lno, bp, vp->m_start.cno))
352 sp->lno = vp->m_start.lno;
353 len = sp->cno = vp->m_start.cno;
356 /* Get the line we're editing. */
357 if (db_eget(sp, vp->m_start.lno, &p, &len, &isempty)) {
363 /* Check to see if we're appending to the line. */
364 if (vp->m_start.cno >= len)
365 LF_SET(TXT_APPENDEOL);
367 rval = v_txt(sp, vp, NULL, p, len,
368 0, OOBLNO, F_ISSET(vp, VC_C1SET) ? vp->count : 1, flags);
371 FREE_SPACEW(sp, bp, blen);
376 * v_Replace -- [count]R
377 * Overwrite multiple characters.
379 * PUBLIC: int v_Replace(SCR *, VICMD *);
382 v_Replace(SCR *sp, VICMD *vp)
389 flags = set_txt_std(sp, vp, 0);
390 sp->showmode = SM_REPLACE;
392 if (db_eget(sp, vp->m_start.lno, &p, &len, &isempty)) {
396 LF_SET(TXT_APPENDEOL);
399 LF_SET(TXT_APPENDEOL);
400 LF_SET(TXT_OVERWRITE | TXT_REPLACE);
402 vp->m_stop.lno = vp->m_start.lno;
403 vp->m_stop.cno = len ? len - 1 : 0;
405 return (v_txt(sp, vp, &vp->m_stop, p, len,
406 0, OOBLNO, F_ISSET(vp, VC_C1SET) ? vp->count : 1, flags));
410 * v_subst -- [buffer][count]s
411 * Substitute characters.
413 * PUBLIC: int v_subst(SCR *, VICMD *);
416 v_subst(SCR *sp, VICMD *vp)
423 flags = set_txt_std(sp, vp, 0);
424 sp->showmode = SM_CHANGE;
426 if (db_eget(sp, vp->m_start.lno, &p, &len, &isempty)) {
430 LF_SET(TXT_APPENDEOL);
433 LF_SET(TXT_APPENDEOL);
434 LF_SET(TXT_EMARK | TXT_OVERWRITE);
437 vp->m_stop.lno = vp->m_start.lno;
439 vp->m_start.cno + (F_ISSET(vp, VC_C1SET) ? vp->count - 1 : 0);
440 if (vp->m_stop.cno > len - 1)
441 vp->m_stop.cno = len - 1;
443 if (p != NULL && cut(sp,
444 F_ISSET(vp, VC_BUFFER) ? &vp->buffer : NULL,
445 &vp->m_start, &vp->m_stop, 0))
448 return (v_txt(sp, vp, &vp->m_stop, p, len, 0, OOBLNO, 1, flags));
453 * Initialize text processing flags.
456 set_txt_std(SCR *sp, VICMD *vp, u_int32_t flags)
459 TXT_ESCAPE | TXT_MAPINPUT | TXT_RECORD | TXT_RESOLVE);
461 if (F_ISSET(vp, VC_ISDOT))
464 if (O_ISSET(sp, O_ALTWERASE))
465 LF_SET(TXT_ALTWERASE);
466 if (O_ISSET(sp, O_AUTOINDENT))
467 LF_SET(TXT_AUTOINDENT);
468 if (O_ISSET(sp, O_BEAUTIFY))
469 LF_SET(TXT_BEAUTIFY);
470 if (O_ISSET(sp, O_SHOWMATCH))
471 LF_SET(TXT_SHOWMATCH);
472 if (F_ISSET(sp, SC_SCRIPT))
474 if (O_ISSET(sp, O_TTYWERASE))
475 LF_SET(TXT_TTYWERASE);
479 * Mapped keys were sometimes unaffected by the wrapmargin option
480 * in the historic 4BSD vi. Consider the following commands, where
481 * each is executed on an empty line, in an 80 column screen, with
482 * the wrapmargin value set to 60.
485 * :map K aABC DEF ^V<ESC><CR>KKKKK
486 * :map K 5aABC DEF ^V<ESC><CR>K
488 * The first and second commands are affected by wrapmargin. The
489 * third is not. (If the inserted text is itself longer than the
490 * wrapmargin value, i.e. if the "ABC DEF " string is replaced by
491 * something that's longer than 60 columns from the beginning of
492 * the line, the first two commands behave as before, but the third
493 * command gets fairly strange.) The problem is that people wrote
494 * macros that depended on the third command NOT being affected by
495 * wrapmargin, as in this gem which centers lines:
497 * map #c $mq81a ^V^[81^V^V|D`qld0:s/ / /g^V^M$p
499 * For compatibility reasons, we try and make it all work here. I
500 * offer no hope that this is right, but it's probably pretty close.
503 * Once I work my courage up, this is all gonna go away. It's too
506 if ((O_ISSET(sp, O_WRAPLEN) || O_ISSET(sp, O_WRAPMARGIN)) &&
507 (!MAPPED_KEYS_WAITING(sp) || !F_ISSET(vp, VC_C1SET)))
508 LF_SET(TXT_WRAPMARGIN);