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[] = "@(#)v_ex.c 10.42 (Berkeley) 6/28/96";
16 #include <sys/types.h>
17 #include <sys/queue.h>
20 #include <bitstring.h>
27 #include "../common/common.h"
30 static int v_ecl __P((SCR *));
31 static int v_ecl_init __P((SCR *));
32 static int v_ecl_log __P((SCR *, TEXT *));
33 static int v_ex_done __P((SCR *, VICMD *));
34 static int v_exec_ex __P((SCR *, VICMD *, EXCMD *));
38 * Repeat the previous substitution.
40 * PUBLIC: int v_again __P((SCR *, VICMD *));
50 ex_cinit(&cmd, C_SUBAGAIN, 2, vp->m_start.lno, vp->m_start.lno, 1, ap);
51 ex_cadd(&cmd, &a, "", 1);
53 return (v_exec_ex(sp, vp, &cmd));
58 * Switch the editor into EX mode.
60 * PUBLIC: int v_exmode __P((SCR *, VICMD *));
71 /* Try and switch screens -- the screen may not permit it. */
72 if (gp->scr_screen(sp, SC_EX)) {
74 "207|The Q command requires the ex terminal interface");
77 (void)gp->scr_attr(sp, SA_ALTERNATE, 0);
79 /* Save the current cursor position. */
80 sp->frp->lno = sp->lno;
81 sp->frp->cno = sp->cno;
82 F_SET(sp->frp, FR_CURSORSET);
84 /* Switch to ex mode. */
85 F_CLR(sp, SC_VI | SC_SCR_VI);
88 /* Move out of the vi screen. */
89 (void)ex_puts(sp, "\n");
96 * Join lines together.
98 * PUBLIC: int v_join __P((SCR *, VICMD *));
110 * The general rule is that '#J' joins # lines, counting the current
111 * line. However, 'J' and '1J' are the same as '2J', i.e. join the
112 * current and next lines. This doesn't map well into the ex command
113 * (which takes two line numbers), so we handle it here. Note that
114 * we never test for EOF -- historically going past the end of file
117 lno = vp->m_start.lno + 1;
118 if (F_ISSET(vp, VC_C1SET) && vp->count > 2)
119 lno = vp->m_start.lno + (vp->count - 1);
121 ex_cinit(&cmd, C_JOIN, 2, vp->m_start.lno, lno, 0, NULL);
122 return (v_exec_ex(sp, vp, &cmd));
126 * v_shiftl -- [count]<motion
129 * PUBLIC: int v_shiftl __P((SCR *, VICMD *));
139 ex_cinit(&cmd, C_SHIFTL, 2, vp->m_start.lno, vp->m_stop.lno, 0, ap);
140 ex_cadd(&cmd, &a, "<", 1);
141 return (v_exec_ex(sp, vp, &cmd));
145 * v_shiftr -- [count]>motion
148 * PUBLIC: int v_shiftr __P((SCR *, VICMD *));
158 ex_cinit(&cmd, C_SHIFTR, 2, vp->m_start.lno, vp->m_stop.lno, 0, ap);
159 ex_cadd(&cmd, &a, ">", 1);
160 return (v_exec_ex(sp, vp, &cmd));
167 * PUBLIC: int v_suspend __P((SCR *, VICMD *));
177 ex_cinit(&cmd, C_STOP, 0, OOBLNO, OOBLNO, 0, ap);
178 ex_cadd(&cmd, &a, "suspend", sizeof("suspend") - 1);
179 return (v_exec_ex(sp, vp, &cmd));
184 * Switch to the previous file.
186 * PUBLIC: int v_switch __P((SCR *, VICMD *));
198 * Try the alternate file name, then the previous file
199 * name. Use the real name, not the user's current name.
201 if ((name = sp->alt_name) == NULL) {
202 msgq(sp, M_ERR, "180|No previous file to edit");
206 /* If autowrite is set, write out the file. */
207 if (file_m1(sp, 0, FS_ALL))
210 ex_cinit(&cmd, C_EDIT, 0, OOBLNO, OOBLNO, 0, ap);
211 ex_cadd(&cmd, &a, name, strlen(name));
212 return (v_exec_ex(sp, vp, &cmd));
217 * Do a tag search on the cursor keyword.
219 * PUBLIC: int v_tagpush __P((SCR *, VICMD *));
230 if (O_ISSET(sp, O_GTAGSMODE) && vp->m_start.cno == 0)
231 ex_cinit(&cmd, C_RTAG, 0, OOBLNO, 0, 0, ap);
234 ex_cinit(&cmd, C_TAG, 0, OOBLNO, 0, 0, ap);
235 ex_cadd(&cmd, &a, VIP(sp)->keyw, strlen(VIP(sp)->keyw));
236 return (v_exec_ex(sp, vp, &cmd));
241 * Pop the tags stack.
243 * PUBLIC: int v_tagpop __P((SCR *, VICMD *));
252 ex_cinit(&cmd, C_TAGPOP, 0, OOBLNO, 0, 0, NULL);
253 return (v_exec_ex(sp, vp, &cmd));
257 * v_filter -- [count]!motion command(s)
258 * Run range through shell commands, replacing text.
260 * PUBLIC: int v_filter __P((SCR *, VICMD *));
272 * Historical vi permitted "!!" in an empty file, and it's handled
273 * as a special case in the ex_bang routine. Don't modify this setup
274 * without understanding that one. In particular, note that we're
275 * manipulating the ex argument structures behind ex's back.
278 * Historical vi did not permit the '!' command to be associated with
279 * a non-line oriented motion command, in general, although it did
280 * with search commands. So, !f; and !w would fail, but !/;<CR>
281 * would succeed, even if they all moved to the same location in the
282 * current line. I don't see any reason to disallow '!' using any of
283 * the possible motion commands.
286 * Historical vi ran the last bang command if N or n was used as the
289 if (F_ISSET(vp, VC_ISDOT) ||
290 ISCMD(vp->rkp, 'N') || ISCMD(vp->rkp, 'n')) {
291 ex_cinit(&cmd, C_BANG,
292 2, vp->m_start.lno, vp->m_stop.lno, 0, NULL);
293 EXP(sp)->argsoff = 0; /* XXX */
295 if (argv_exp1(sp, &cmd, "!", 1, 1))
297 cmd.argc = EXP(sp)->argsoff; /* XXX */
298 cmd.argv = EXP(sp)->args; /* XXX */
299 return (v_exec_ex(sp, vp, &cmd));
302 /* Get the command from the user. */
304 '!', TXT_BS | TXT_CR | TXT_ESCAPE | TXT_FILEC | TXT_PROMPT))
308 * Check to see if the user changed their mind.
311 * Entering <escape> on an empty line was historically an error,
312 * this implementation doesn't bother.
314 tp = sp->tiq.cqh_first;
315 if (tp->term != TERM_OK) {
316 vp->m_final.lno = sp->lno;
317 vp->m_final.cno = sp->cno;
321 /* Home the cursor. */
324 ex_cinit(&cmd, C_BANG, 2, vp->m_start.lno, vp->m_stop.lno, 0, NULL);
325 EXP(sp)->argsoff = 0; /* XXX */
327 if (argv_exp1(sp, &cmd, tp->lb + 1, tp->len - 1, 1))
329 cmd.argc = EXP(sp)->argsoff; /* XXX */
330 cmd.argv = EXP(sp)->args; /* XXX */
331 return (v_exec_ex(sp, vp, &cmd));
336 * Execute some command(s) based on an event.
338 * PUBLIC: int v_event_exec __P((SCR *, VICMD *));
347 switch (vp->ev.e_event) {
349 ex_cinit(&cmd, C_QUIT, 0, OOBLNO, OOBLNO, 0, NULL);
352 ex_cinit(&cmd, C_WRITE, 0, OOBLNO, OOBLNO, 0, NULL);
357 return (v_exec_ex(sp, vp, &cmd));
362 * Execute an ex command.
365 v_exec_ex(sp, vp, exp)
372 rval = exp->cmd->fn(sp, exp);
373 return (v_ex_done(sp, vp) || rval);
378 * Execute a colon command line.
380 * PUBLIC: int v_ex __P((SCR *, VICMD *));
389 int do_cedit, do_resolution, ifcontinue;
395 * If we put out more than a single line of messages, or ex trashes
396 * the screen, the user may continue entering ex commands. We find
397 * this out when we do the screen/message resolution. We can't enter
398 * completely into ex mode however, because the user can elect to
399 * return into vi mode by entering any key, i.e. we have to be in raw
402 for (do_cedit = do_resolution = 0;;) {
405 * There may already be an ex command waiting to run. If
406 * so, we continue with it.
408 if (!EXCMD_RUNNING(gp)) {
410 if (v_tcmd(sp, vp, ':',
411 TXT_BS | TXT_CEDIT | TXT_FILEC | TXT_PROMPT))
413 tp = sp->tiq.cqh_first;
416 * If the user entered a single <esc>, they want to
417 * edit their colon command history. If they already
418 * entered some text, move it into the edit history.
420 if (tp->term == TERM_CEDIT) {
421 if (tp->len > 1 && v_ecl_log(sp, tp))
427 /* If the user didn't enter anything, return. */
428 if (tp->term == TERM_BS)
431 /* Log the command. */
432 if (O_STR(sp, O_CEDIT) != NULL && v_ecl_log(sp, tp))
435 /* Push a command on the command stack. */
436 if (ex_run_str(sp, NULL, tp->lb, tp->len, 0, 1))
440 /* Home the cursor. */
445 * If the editor wrote the screen behind curses back, put out
446 * a <newline> so that we don't overwrite the user's command
447 * with its output or the next want-to-continue? message. This
448 * doesn't belong here, but I can't find another place to put
449 * it. See, we resolved the output from the last ex command,
450 * and the user entered another one. This is the only place
451 * where we have control before the ex command writes output.
452 * We could get control in vs_msg(), but we have no way to know
453 * if command didn't put out any output when we try and resolve
454 * this command. This fixes a bug where combinations of ex
455 * commands, e.g. ":set<CR>:!date<CR>:set" didn't look right.
457 if (F_ISSET(sp, SC_SCR_EXWROTE))
460 /* Call the ex parser. */
463 /* Flush ex messages. */
466 /* Resolve any messages. */
467 if (vs_ex_resolve(sp, &ifcontinue))
471 * Continue or return. If continuing, make sure that we
472 * eventually do resolution.
478 /* If we're continuing, it's a new command. */
483 * If the user previously continued an ex command, we have to do
484 * resolution to clean up the screen. Don't wait, we already did
488 F_SET(sp, SC_EX_WAIT_NO);
489 if (vs_ex_resolve(sp, &ifcontinue))
493 /* Cleanup from the ex command. */
494 if (v_ex_done(sp, vp))
497 /* The user may want to edit their colon command history. */
506 * Cleanup from an ex command.
516 * The only cursor modifications are real, however, the underlying
517 * line may have changed; don't trust anything. This code has been
518 * a remarkably fertile place for bugs. Do a reality check on a
519 * cursor value, and make sure it's okay. If necessary, change it.
520 * Ex keeps track of the line number, but it cares less about the
521 * column and it may have disappeared.
523 * Don't trust ANYTHING.
526 * Ex will soon have to start handling the column correctly; see
527 * the POSIX 1003.2 standard.
529 if (db_eget(sp, sp->lno, NULL, &len, NULL)) {
532 } else if (sp->cno >= len)
533 sp->cno = len ? len - 1 : 0;
535 vp->m_final.lno = sp->lno;
536 vp->m_final.cno = sp->cno;
539 * Don't re-adjust the cursor after executing an ex command,
540 * and ex movements are permanent.
542 F_CLR(vp, VM_RCM_MASK);
543 F_SET(vp, VM_RCM_SET);
550 * Start an edit window on the colon command-line commands.
559 /* Initialize the screen, if necessary. */
561 if (gp->ccl_sp == NULL && v_ecl_init(sp))
564 /* Get a new screen. */
565 if (screen_init(gp, sp, &new))
567 if (vs_split(sp, new, 1)) {
568 (void)screen_end(new);
572 /* Attach to the screen. */
573 new->ep = gp->ccl_sp->ep;
576 new->frp = gp->ccl_sp->frp;
577 new->frp->flags = sp->frp->flags;
579 /* Move the cursor to the end. */
580 (void)db_last(new, &new->lno);
584 /* Remember the originating window. */
587 /* It's a special window. */
588 F_SET(new, SC_COMEDIT);
590 /* Set up the switch. */
592 F_SET(sp, SC_SSWITCH);
598 * Execute a command from a colon command-line window.
600 * PUBLIC: int v_ecl_exec __P((SCR *));
609 if (db_get(sp, sp->lno, 0, &p, &len) && sp->lno == 1) {
610 v_emsg(sp, NULL, VIM_EMPTY);
614 msgq(sp, M_BERR, "307|No ex command to execute");
618 /* Push the command on the command stack. */
619 if (ex_run_str(sp, NULL, p, len, 0, 0))
622 /* Set up the switch. */
623 sp->nextdisp = sp->ccl_parent;
630 * Log a command into the colon command-line log file.
641 /* Initialize the screen, if necessary. */
642 if (sp->gp->ccl_sp == NULL && v_ecl_init(sp))
646 * Don't log colon command window commands into the colon command
649 if (sp->ep == sp->gp->ccl_sp->ep)
654 * Swap the current EXF with the colon command file EXF. This
655 * isn't pretty, but too many routines "know" that sp->ep points
656 * to the current EXF.
659 sp->ep = sp->gp->ccl_sp->ep;
660 if (db_last(sp, &lno)) {
664 rval = db_append(sp, 0, lno, tp->lb, tp->len);
671 * Initialize the colon command-line log file.
682 /* Get a temporary file. */
683 if ((frp = file_add(sp, NULL)) == NULL)
688 * Create a screen -- the file initialization code wants one.
690 if (screen_init(gp, sp, &gp->ccl_sp))
692 if (file_init(gp->ccl_sp, frp, NULL, 0)) {
693 (void)screen_end(gp->ccl_sp);
697 /* The underlying file isn't recoverable. */
698 F_CLR(gp->ccl_sp->ep, F_RCV_ON);