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: vi.c,v 10.70 2000/07/15 20:26:36 skimo Exp $ (Berkeley) $Date: 2000/07/15 20:26:36 $";
16 #include <sys/types.h>
17 #include <sys/queue.h>
20 #include <bitstring.h>
29 #include "../common/common.h"
33 GC_ERR
, GC_ERR_NOFLUSH
, GC_EVENT
, GC_FATAL
, GC_INTERRUPT
, GC_OK
37 *v_alias
__P((SCR
*, VICMD
*, VIKEYS
const *));
38 static gcret_t v_cmd
__P((SCR
*, VICMD
*, VICMD
*, VICMD
*, int *, int *));
39 static int v_count
__P((SCR
*, VICMD
*, ARG_CHAR_T
, u_long
*));
40 static void v_dtoh
__P((SCR
*));
41 static int v_init
__P((SCR
*));
42 static gcret_t v_key
__P((SCR
*, VICMD
*, int, u_int32_t
));
43 static int v_motion
__P((SCR
*, VICMD
*, VICMD
*, int *));
45 #if defined(DEBUG) && defined(COMLOG)
46 static void v_comlog
__P((SCR
*, VICMD
*));
51 * The dot structure can be set by the underlying vi functions,
52 * see v_Put() and v_put().
54 #define DOT (&VIP(sp)->sdot)
55 #define DOTMOTION (&VIP(sp)->sdotmotion)
59 * Main vi command loop.
61 * PUBLIC: int vi __P((SCR **));
73 int comcount
, mapped
, rval
;
75 /* Get the first screen. */
80 /* Initialize the command structure. */
82 memset(vp
, 0, sizeof(VICMD
));
84 /* Reset strange attraction. */
85 F_SET(vp
, VM_RCM_SET
);
87 /* Initialize the vi screen. */
92 (void)sp
->gp
->scr_rename(sp
, sp
->frp
->name
, 1);
94 for (vip
= VIP(sp
), rval
= 0;;) {
95 /* Resolve messages. */
96 if (!MAPPED_KEYS_WAITING(sp
) && vs_resolve(sp
, NULL
, 0))
100 * If not skipping a refresh, return to command mode and
101 * refresh the screen.
103 if (F_ISSET(vip
, VIP_S_REFRESH
))
104 F_CLR(vip
, VIP_S_REFRESH
);
106 sp
->showmode
= SM_COMMAND
;
107 if (vs_refresh(sp
, 0))
111 /* Set the new favorite position. */
112 if (F_ISSET(vp
, VM_RCM_SET
| VM_RCM_SETFNB
| VM_RCM_SETNNB
)) {
113 F_CLR(vip
, VIP_RCM_LAST
);
114 (void)vs_column(sp
, &sp
->rcm
);
118 * If not currently in a map, log the cursor position,
119 * and set a flag so that this command can become the
122 if (MAPPED_KEYS_WAITING(sp
))
131 * There may be an ex command waiting, and we returned here
132 * only because we exited a screen or file. In this case,
133 * we simply go back into the ex parser.
135 if (EXCMD_RUNNING(wp
)) {
136 vp
->kp
= &vikeys
[':'];
140 /* Refresh the command structure. */
141 memset(vp
, 0, sizeof(VICMD
));
144 * We get a command, which may or may not have an associated
145 * motion. If it does, we get it too, calling its underlying
146 * function to get the resulting mark. We then call the
147 * command setting the cursor to the resulting mark.
150 * Vi historically flushed mapped characters on error, but
151 * entering extra <escape> characters at the beginning of
152 * a map wasn't considered an error -- in fact, users would
153 * put leading <escape> characters in maps to clean up vi
154 * state before the map was interpreted. Beauty!
156 switch (v_cmd(sp
, DOT
, vp
, NULL
, &comcount
, &mapped
)) {
170 /* Check for security setting. */
171 if (F_ISSET(vp
->kp
, V_SECURE
) && O_ISSET(sp
, O_SECURE
)) {
172 ex_emsg(sp
, KEY_NAME(sp
, vp
->key
), EXM_SECURE
);
177 * Historical practice: if a dot command gets a new count,
178 * any motion component goes away, i.e. "d3w2." deletes a
181 if (F_ISSET(vp
, VC_ISDOT
) && comcount
)
182 DOTMOTION
->count
= 1;
184 /* Copy the key flags into the local structure. */
185 F_SET(vp
, vp
->kp
->flags
);
187 /* Prepare to set the previous context. */
188 if (F_ISSET(vp
, V_ABS
| V_ABS_C
| V_ABS_L
)) {
194 * Set the three cursor locations to the current cursor. The
195 * underlying routines don't bother if the cursor doesn't move.
196 * This also handles line commands (e.g. Y) defaulting to the
199 vp
->m_start
.lno
= vp
->m_stop
.lno
= vp
->m_final
.lno
= sp
->lno
;
200 vp
->m_start
.cno
= vp
->m_stop
.cno
= vp
->m_final
.cno
= sp
->cno
;
203 * Do any required motion; v_motion sets the from MARK and the
204 * line mode flag, as well as the VM_RCM flags.
206 if (F_ISSET(vp
, V_MOTION
) &&
207 v_motion(sp
, DOTMOTION
, vp
, &mapped
)) {
214 * If a count is set and the command is line oriented, set the
215 * to MARK here relative to the cursor/from MARK. This is for
216 * commands that take both counts and motions, i.e. "4yy" and
217 * "y%". As there's no way the command can know which the user
218 * did, we have to do it here. (There are commands that are
219 * line oriented and that take counts ("#G", "#H"), for which
220 * this calculation is either completely meaningless or wrong.
221 * Each command must validate the value for itself.
223 if (F_ISSET(vp
, VC_C1SET
) && F_ISSET(vp
, VM_LMODE
))
224 vp
->m_stop
.lno
+= vp
->count
- 1;
226 /* Increment the command count. */
229 #if defined(DEBUG) && defined(COMLOG)
232 /* Call the function. */
233 ex_continue
: if (vp
->kp
->func(sp
, vp
))
236 /* Make sure no function left the temporary space locked. */
237 if (F_ISSET(wp
, W_TMP_INUSE
)) {
238 F_CLR(wp
, W_TMP_INUSE
);
240 "232|vi: temporary buffer not released");
244 * If we're exiting this screen, move to the next one, or, if
245 * there aren't any more, return to the main editor loop. The
246 * ordering is careful, don't discard the contents of sp until
249 if (F_ISSET(sp
, SC_EXIT
| SC_EXIT_FORCE
)) {
250 if (file_end(sp
, NULL
, F_ISSET(sp
, SC_EXIT_FORCE
)))
252 if (vs_discard(sp
, &next
))
254 if (next
== NULL
&& vs_swap(sp
, &next
, NULL
))
262 /* Switch screens, change focus. */
265 (void)sp
->gp
->scr_rename(sp
, sp
->frp
->name
, 1);
267 /* Don't trust the cursor. */
268 F_SET(vip
, VIP_CUR_INVALID
);
274 * Set the dot command structure.
277 * Historically, commands which used mapped keys did not
278 * set the dot command, with the exception of the text
281 if (F_ISSET(vp
, V_DOT
) && !mapped
) {
283 F_SET(DOT
, VC_ISDOT
);
286 * If a count was supplied for both the command and
287 * its motion, the count was used only for the motion.
288 * Turn the count back on for the dot structure.
290 if (F_ISSET(vp
, VC_C1RESET
))
291 F_SET(DOT
, VC_C1SET
);
293 /* VM flags aren't retained. */
294 F_CLR(DOT
, VM_COMMASK
| VM_RCM_MASK
);
298 * Some vi row movements are "attracted" to the last position
299 * set, i.e. the VM_RCM commands are moths to the VM_RCM_SET
300 * commands' candle. If the movement is to the EOL the vi
301 * command handles it. If it's to the beginning, we handle it
304 * Note, some commands (e.g. _, ^) don't set the VM_RCM_SETFNB
305 * flag, but do the work themselves. The reason is that they
306 * have to modify the column in case they're being used as a
307 * motion component. Other similar commands (e.g. +, -) don't
308 * have to modify the column because they are always line mode
309 * operations when used as motions, so the column number isn't
312 * Does this totally violate the screen and editor layering?
313 * You betcha. As they say, if you think you understand it,
316 switch (F_ISSET(vp
, VM_RCM_MASK
)) {
321 vp
->m_final
.cno
= vs_rcm(sp
,
322 vp
->m_final
.lno
, F_ISSET(vip
, VIP_RCM_LAST
));
325 F_SET(vip
, VIP_RCM_LAST
);
331 if (nonblank(sp
, vp
->m_final
.lno
, &vp
->m_final
.cno
))
338 /* Update the cursor. */
339 sp
->lno
= vp
->m_final
.lno
;
340 sp
->cno
= vp
->m_final
.cno
;
343 * Set the absolute mark -- set even if a tags or similar
344 * command, since the tag may be moving to the same file.
346 if ((F_ISSET(vp
, V_ABS
) ||
347 F_ISSET(vp
, V_ABS_L
) && sp
->lno
!= abs
.lno
||
348 F_ISSET(vp
, V_ABS_C
) &&
349 (sp
->lno
!= abs
.lno
|| sp
->cno
!= abs
.cno
)) &&
350 mark_set(sp
, ABSMARK1
, &abs
, 1))
354 err
: if (v_event_flush(sp
, CH_MAPPED
))
356 "110|Vi command failed: mapped keys discarded");
360 * Check and clear interrupts. There's an obvious race, but
361 * it's not worth fixing.
363 gc_err_noflush
: if (INTERRUPTED(sp
)) {
364 intr
: CLR_INTERRUPT(sp
);
365 if (v_event_flush(sp
, CH_MAPPED
))
367 "231|Interrupted: mapped keys discarded");
369 msgq(sp
, M_ERR
, "236|Interrupted");
372 /* If the last command switched screens, update. */
373 if (F_ISSET(sp
, SC_SSWITCH
)) {
374 F_CLR(sp
, SC_SSWITCH
);
377 * If the current screen is still displayed, it will
378 * need a new status line.
380 F_SET(sp
, SC_STATUS
);
382 /* Switch screens, change focus. */
385 (void)sp
->gp
->scr_rename(sp
, sp
->frp
->name
, 1);
387 /* Don't trust the cursor. */
388 F_SET(vip
, VIP_CUR_INVALID
);
390 /* Refresh so we can display messages. */
391 if (vs_refresh(sp
, 1))
395 /* If the last command switched files, change focus. */
396 if (F_ISSET(sp
, SC_FSWITCH
)) {
397 F_CLR(sp
, SC_FSWITCH
);
398 (void)sp
->gp
->scr_rename(sp
, sp
->frp
->name
, 1);
401 /* If leaving vi, return to the main editor loop. */
402 if (F_ISSET(gp
, G_SRESTART
) || F_ISSET(sp
, SC_EX
)) {
413 #define KEY(key, ec_flags) { \
414 if ((gcret = v_key(sp, vp, 0, ec_flags)) != GC_OK) \
416 if (vp->ev.e_value == K_ESCAPE) \
418 if (FL_ISSET(vp->ev.e_flags, CH_MAPPED)) \
424 * The O_TILDEOP option makes the ~ command take a motion instead
425 * of a straight count. This is the replacement structure we use
426 * instead of the one currently in the VIKEYS table.
429 * This should probably be deleted -- it's not all that useful, and
430 * we get help messages wrong.
432 VIKEYS
const tmotion
= {
433 v_mulcase
, V_CNT
|V_DOT
|V_MOTION
|VM_RCM_SET
,
434 "[count]~[count]motion",
435 " ~ change case to motion"
443 v_cmd(sp
, dp
, vp
, ismotion
, comcountp
, mappedp
)
446 VICMD
*ismotion
; /* Previous key if getting motion component. */
447 int *comcountp
, *mappedp
;
449 enum { COMMANDMODE
, ISPARTIAL
, NOTPARTIAL
} cpart
;
457 * Get an event command or a key. Event commands are simple, and
458 * don't have any additional information.
460 cpart
= ismotion
== NULL
? COMMANDMODE
: ISPARTIAL
;
461 gcret
= v_key(sp
, vp
, 1, EC_MAPCOMMAND
);
462 if (gcret
!= GC_OK
) {
463 if (gcret
!= GC_EVENT
)
467 if (ismotion
!= NULL
&& !F_ISSET(vp
->kp
, V_MOVE
))
468 v_event_err(sp
, &vp
->ev
);
473 * Keys are not simple. (Although vi's command structure less complex
474 * than ex (and don't think I'm not grateful!) The command syntax is:
476 * [count] [buffer] [count] key [[motion] | [buffer] [character]]
478 * and there are, of course, several special cases. The motion value
479 * is itself a vi command, with the syntax:
481 * [count] key [character]
483 * <escape> cancels partial commands, i.e. a command where at least
484 * one non-numeric character has been entered. Otherwise, it beeps
488 * POSIX 1003.2-1992 explicitly disallows cancelling commands where
489 * all that's been entered is a number, requiring that the terminal
492 if (vp
->ev
.e_value
== K_ESCAPE
)
496 * Commands that are mapped are treated differently (e.g., they
497 * don't set the dot command. Pass that information back.
499 if (FL_ISSET(vp
->ev
.e_flags
, CH_MAPPED
))
503 if (ismotion
== NULL
)
506 /* Pick up an optional buffer. */
509 if (ismotion
!= NULL
) {
510 v_emsg(sp
, NULL
, VIM_COMBUF
);
514 F_SET(vp
, VC_BUFFER
);
516 KEY(key
, EC_MAPCOMMAND
);
520 * Pick up an optional count, where a leading 0 isn't a count, it's
521 * a command. When a count is specified, the dot command behaves
522 * differently, pass the information back.
524 if (ISDIGIT(key
) && key
!= '0') {
525 if (v_count(sp
, vp
, key
, &vp
->count
))
531 KEY(key
, EC_MAPCOMMAND
);
535 /* Pick up optional buffer. */
538 if (F_ISSET(vp
, VC_BUFFER
)) {
539 msgq(sp
, M_ERR
, "234|Only one buffer may be specified");
542 if (ismotion
!= NULL
) {
543 v_emsg(sp
, NULL
, VIM_COMBUF
);
547 F_SET(vp
, VC_BUFFER
);
549 KEY(key
, EC_MAPCOMMAND
);
552 /* Check for an OOB command key. */
554 if (key
> MAXVIKEY
) {
555 v_emsg(sp
, KEY_NAME(sp
, key
), VIM_NOCOM
);
558 kp
= &vikeys
[vp
->key
= key
];
562 * Historically, D accepted and then ignored a count. Match it.
564 if (vp
->key
== 'D' && F_ISSET(vp
, VC_C1SET
)) {
571 * There are several commands that we implement as aliases, both
572 * to match historic practice and to ensure consistency. Check
573 * for command aliases.
575 if (kp
->func
== NULL
&& (kp
= v_alias(sp
, vp
, kp
)) == NULL
)
578 /* The tildeop option makes the ~ command take a motion. */
579 if (key
== '~' && O_ISSET(sp
, O_TILDEOP
))
585 * Find the command. The only legal command with no underlying
586 * function is dot. It's historic practice that <escape> doesn't
587 * just erase the preceding number, it beeps the terminal as well.
588 * It's a common problem, so just beep the terminal unless verbose
591 if (kp
->func
== NULL
) {
593 v_emsg(sp
, KEY_NAME(sp
, key
),
594 vp
->ev
.e_value
== K_ESCAPE
?
595 VIM_NOCOM_B
: VIM_NOCOM
);
599 /* If called for a motion command, stop now. */
605 * If a '.' is immediately entered after an undo command, we
606 * replay the log instead of redoing the last command. This
607 * is necessary because 'u' can't set the dot command -- see
608 * vi/v_undo.c:v_undo for details.
610 if (VIP(sp
)->u_ccnt
== sp
->ccnt
) {
611 vp
->kp
= &vikeys
['u'];
616 /* Otherwise, a repeatable command must have been executed. */
617 if (!F_ISSET(dp
, VC_ISDOT
)) {
618 msgq(sp
, M_ERR
, "208|No command to repeat");
622 /* Set new count/buffer, if any, and return. */
623 if (F_ISSET(vp
, VC_C1SET
)) {
625 dp
->count
= vp
->count
;
627 if (F_ISSET(vp
, VC_BUFFER
))
628 dp
->buffer
= vp
->buffer
;
634 /* Set the flags based on the command flags. */
637 /* Check for illegal count. */
638 if (F_ISSET(vp
, VC_C1SET
) && !LF_ISSET(V_CNT
))
641 /* Illegal motion command. */
642 if (ismotion
== NULL
) {
643 /* Illegal buffer. */
644 if (!LF_ISSET(V_OBUF
) && F_ISSET(vp
, VC_BUFFER
))
647 /* Required buffer. */
648 if (LF_ISSET(V_RBUF
)) {
650 F_SET(vp
, VC_BUFFER
);
655 * Special case: '[', ']' and 'Z' commands. Doesn't the fact that
656 * the *single* characters don't mean anything but the *doubled*
657 * characters do, just frost your shorts?
659 if (vp
->key
== '[' || vp
->key
== ']' || vp
->key
== 'Z') {
661 * Historically, half entered [[, ]] or Z commands weren't
662 * cancelled by <escape>, the terminal was beeped instead.
663 * POSIX.2-1992 probably didn't notice, and requires that
664 * they be cancelled instead of beeping. Seems fine to me.
666 * Don't set the EC_MAPCOMMAND flag, apparently ] is a popular
667 * vi meta-character, and we don't want the user to wait while
668 * we time out a possible mapping. This *appears* to match
669 * historic vi practice, but with mapping characters, You Just
674 if (vp
->key
!= key
) {
675 usage
: if (ismotion
== NULL
)
677 else if (ismotion
->key
== '~' && O_ISSET(sp
, O_TILDEOP
))
680 s
= vikeys
[ismotion
->key
].usage
;
681 v_emsg(sp
, s
, VIM_USAGE
);
685 /* Special case: 'z' command. */
686 if (vp
->key
== 'z') {
687 KEY(vp
->character
, 0);
688 if (ISDIGIT(vp
->character
)) {
689 if (v_count(sp
, vp
, vp
->character
, &vp
->count2
))
692 KEY(vp
->character
, 0);
697 * Commands that have motion components can be doubled to imply the
700 if (ismotion
!= NULL
&& ismotion
->key
!= key
&& !LF_ISSET(V_MOVE
)) {
701 msgq(sp
, M_ERR
, "210|%s may not be used as a motion command",
706 /* Pick up required trailing character. */
707 if (LF_ISSET(V_CHAR
))
708 KEY(vp
->character
, 0);
710 /* Get any associated cursor word. */
711 if (F_ISSET(kp
, V_KEYW
) && v_curword(sp
))
716 esc
: switch (cpart
) {
718 msgq(sp
, M_BERR
, "211|Already in command mode");
719 return (GC_ERR_NOFLUSH
);
723 (void)sp
->gp
->scr_bell(sp
);
732 * Get resulting motion mark.
735 v_motion(sp
, dm
, vp
, mappedp
)
745 int tilde_reset
, notused
;
748 * If '.' command, use the dot motion, else get the motion command.
749 * Clear any line motion flags, the subsequent motion isn't always
750 * the same, i.e. "/aaa" may or may not be a line motion.
752 if (F_ISSET(vp
, VC_ISDOT
)) {
754 F_SET(&motion
, VC_ISDOT
);
755 F_CLR(&motion
, VM_COMMASK
);
758 memset(&motion
, 0, sizeof(VICMD
));
759 gcret
= v_cmd(sp
, NULL
, &motion
, vp
, ¬used
, mappedp
);
760 if (gcret
!= GC_OK
&& gcret
!= GC_EVENT
)
765 * A count may be provided both to the command and to the motion, in
766 * which case the count is multiplicative. For example, "3y4y" is the
767 * same as "12yy". This count is provided to the motion command and
768 * not to the regular function.
770 cnt
= motion
.count
= F_ISSET(&motion
, VC_C1SET
) ? motion
.count
: 1;
771 if (F_ISSET(vp
, VC_C1SET
)) {
772 motion
.count
*= vp
->count
;
773 F_SET(&motion
, VC_C1SET
);
776 * Set flags to restore the original values of the command
777 * structure so dot commands can change the count values,
778 * e.g. "2dw" "3." deletes a total of five words.
781 F_SET(vp
, VC_C1RESET
);
785 * Some commands can be repeated to indicate the current line. In
786 * this case, or if the command is a "line command", set the flags
787 * appropriately. If not a doubled command, run the function to get
788 * the resulting mark.
790 if (gcret
!= GC_EVENT
&& vp
->key
== motion
.key
) {
791 F_SET(vp
, VM_LDOUBLE
| VM_LMODE
);
793 /* Set the origin of the command. */
794 vp
->m_start
.lno
= sp
->lno
;
798 * Set the end of the command.
800 * If the current line is missing, i.e. the file is empty,
801 * historic vi permitted a "cc" or "!!" command to insert
804 vp
->m_stop
.lno
= sp
->lno
+ motion
.count
- 1;
805 if (db_get(sp
, vp
->m_stop
.lno
, 0, NULL
, &len
)) {
806 if (vp
->m_stop
.lno
!= 1 ||
807 vp
->key
!= 'c' && vp
->key
!= '!') {
808 v_emsg(sp
, NULL
, VIM_EMPTY
);
813 vp
->m_stop
.cno
= len
? len
- 1 : 0;
816 * Motion commands change the underlying movement (*snarl*).
817 * For example, "l" is illegal at the end of a line, but "dl"
818 * is not. Set flags so the function knows the situation.
824 * Use yank instead of creating a new motion command, it's a
825 * lot easier for now.
827 if (vp
->kp
== &tmotion
) {
829 vp
->kp
= &vikeys
['y'];
834 * Copy the key flags into the local structure, except for the
835 * RCM flags -- the motion command will set the RCM flags in
836 * the vp structure if necessary. This means that the motion
837 * command is expected to determine where the cursor ends up!
838 * However, we save off the current RCM mask and restore it if
839 * it no RCM flags are set by the motion command, with a small
842 * We replace the VM_RCM_SET flag with the VM_RCM flag. This
843 * is so that cursor movement doesn't set the relative position
844 * unless the motion command explicitly specified it. This
845 * appears to match historic practice, but I've never been able
846 * to develop a hard-and-fast rule.
848 flags
= F_ISSET(vp
, VM_RCM_MASK
);
849 if (LF_ISSET(VM_RCM_SET
)) {
853 F_CLR(vp
, VM_RCM_MASK
);
854 F_SET(&motion
, motion
.kp
->flags
& ~VM_RCM_MASK
);
857 * Set the three cursor locations to the current cursor. This
858 * permits commands like 'j' and 'k', that are line oriented
859 * motions and have special cursor suck semantics when they are
860 * used as standalone commands, to ignore column positioning.
863 motion
.m_stop
.lno
= motion
.m_start
.lno
= sp
->lno
;
865 motion
.m_stop
.cno
= motion
.m_start
.cno
= sp
->cno
;
867 /* Run the function. */
868 if ((motion
.kp
->func
)(sp
, &motion
))
872 * If the current line is missing, i.e. the file is empty,
873 * historic vi allowed "c<motion>" or "!<motion>" to insert
874 * text. Otherwise fail -- most motion commands will have
875 * already failed, but some, e.g. G, succeed in empty files.
877 if (!db_exist(sp
, vp
->m_stop
.lno
)) {
878 if (vp
->m_stop
.lno
!= 1 ||
879 vp
->key
!= 'c' && vp
->key
!= '!') {
880 v_emsg(sp
, NULL
, VIM_EMPTY
);
894 * Copy cut buffer, line mode and cursor position information
895 * from the motion command structure, i.e. anything that the
896 * motion command can set for us. The commands can flag the
897 * movement as a line motion (see v_sentence) as well as set
898 * the VM_RCM_* flags explicitly.
900 F_SET(vp
, F_ISSET(&motion
, VM_COMMASK
| VM_RCM_MASK
));
903 * If the motion command set no relative motion flags, use
904 * the (slightly) modified previous values.
906 if (!F_ISSET(vp
, VM_RCM_MASK
))
910 * Commands can change behaviors based on the motion command
911 * used, for example, the ! command repeated the last bang
912 * command if N or n was used as the motion.
917 * Motion commands can reset all of the cursor information.
918 * If the motion is in the reverse direction, switch the
919 * from and to MARK's so that it's in a forward direction.
920 * Motions are from the from MARK to the to MARK (inclusive).
922 if (motion
.m_start
.lno
> motion
.m_stop
.lno
||
923 motion
.m_start
.lno
== motion
.m_stop
.lno
&&
924 motion
.m_start
.cno
> motion
.m_stop
.cno
) {
925 vp
->m_start
= motion
.m_stop
;
926 vp
->m_stop
= motion
.m_start
;
928 vp
->m_start
= motion
.m_start
;
929 vp
->m_stop
= motion
.m_stop
;
931 vp
->m_final
= motion
.m_final
;
935 * If the command sets dot, save the motion structure. The motion
936 * count was changed above and needs to be reset, that's why this
937 * is done here, and not in the calling routine.
939 if (F_ISSET(vp
->kp
, V_DOT
)) {
948 * Initialize the vi screen.
960 /* Switch into vi. */
961 if (gp
->scr_screen(sp
, SC_VI
))
963 (void)gp
->scr_attr(sp
, SA_ALTERNATE
, 1);
965 F_CLR(sp
, SC_EX
| SC_SCR_EX
);
969 * Initialize screen values.
971 * Small windows: see vs_refresh(), section 6a.
974 * t_minrows is the minimum rows to display
975 * t_maxrows is the maximum rows to display (rows - 1)
976 * t_rows is the rows currently being displayed
978 sp
->rows
= vip
->srows
= O_VAL(sp
, O_LINES
);
979 sp
->cols
= O_VAL(sp
, O_COLUMNS
);
980 sp
->t_rows
= sp
->t_minrows
= O_VAL(sp
, O_WINDOW
);
982 if (sp
->t_rows
> sp
->rows
- 1) {
983 sp
->t_minrows
= sp
->t_rows
= sp
->rows
- 1;
985 "214|Windows option value is too large, max is %u",
988 sp
->t_maxrows
= sp
->rows
- 1;
991 sp
->roff
= sp
->coff
= 0;
993 /* Create a screen map. */
994 CALLOC_RET(sp
, HMAP
, SMAP
*, SIZE_HMAP(sp
), sizeof(SMAP
));
995 TMAP
= HMAP
+ (sp
->t_rows
- 1);
1001 * Fill the screen map from scratch -- try and center the line. That
1002 * way if we're starting with a file we've seen before, we'll put the
1003 * line in the middle, otherwise, it won't work and we'll end up with
1004 * the line at the top.
1006 F_SET(sp
, SC_SCR_REFORMAT
| SC_SCR_CENTER
);
1008 /* Invalidate the cursor. */
1009 F_SET(vip
, VIP_CUR_INVALID
);
1011 /* Paint the screen image from scratch. */
1012 F_SET(vip
, VIP_N_EX_PAINT
);
1019 * Move all but the current screen to the hidden queue.
1030 /* Move all screens to the hidden queue, tossing screen maps. */
1031 for (hidden
= 0, gp
= sp
->gp
, wp
= sp
->wp
;
1032 (tsp
= wp
->scrq
.cqh_first
) != (void *)&wp
->scrq
; ++hidden
) {
1033 if (_HMAP(tsp
) != NULL
) {
1037 CIRCLEQ_REMOVE(&wp
->scrq
, tsp
, q
);
1038 CIRCLEQ_INSERT_TAIL(&gp
->hq
, tsp
, q
);
1039 /* XXXX Change if hidden screens per window */
1043 /* Move current screen back to the display queue. */
1044 CIRCLEQ_REMOVE(&gp
->hq
, sp
, q
);
1045 CIRCLEQ_INSERT_TAIL(&wp
->scrq
, sp
, q
);
1050 "319|%d screens backgrounded; use :display to list them",
1056 * Get the word (or non-word) the cursor is on.
1058 * PUBLIC: int v_curword __P((SCR *));
1065 size_t beg
, end
, len
;
1069 if (db_get(sp
, sp
->lno
, DBG_FATAL
, &p
, &len
))
1074 * Historically, tag commands skipped over any leading whitespace
1075 * characters. Make this true in general when using cursor words.
1076 * If movement, getting a cursor word implies moving the cursor to
1077 * its beginning. Refresh now.
1080 * Find the beginning/end of the keyword. Keywords are currently
1081 * used for cursor-word searching and for tags. Historical vi
1082 * only used the word in a tag search from the cursor to the end
1083 * of the word, i.e. if the cursor was on the 'b' in " abc ", the
1084 * tag was "bc". For consistency, we make cursor word searches
1085 * follow the same rule.
1088 beg
= sp
->cno
; beg
< len
&& isspace(p
[beg
]); moved
= 1, ++beg
);
1090 msgq(sp
, M_BERR
, "212|Cursor not in a word");
1095 (void)vs_refresh(sp
, 0);
1098 /* Find the end of the word. */
1099 for (state
= inword(p
[beg
]),
1100 end
= beg
; ++end
< len
&& state
== inword(p
[end
]););
1104 BINC_RETW(sp
, vip
->keyw
, vip
->klen
, len
+1);
1105 MEMMOVEW(vip
->keyw
, p
+ beg
, len
);
1106 vip
->keyw
[len
] = '\0'; /* XXX */
1112 * Check for a command alias.
1114 static VIKEYS
const *
1123 case 'C': /* C -> c$ */
1127 case 'D': /* D -> d$ */
1131 case 'S': /* S -> c_ */
1135 case 'Y': /* Y -> y_ */
1142 return (v_event_push(sp
,
1143 NULL
, &push
, 1, CH_NOMAP
| CH_QUOTED
) ? NULL
: &vikeys
[vp
->key
]);
1148 * Return the next count.
1151 v_count(sp
, vp
, fkey
, countp
)
1164 * Assume that overflow results in a smaller number.
1166 tc
= count
* 10 + vp
->ev
.e_c
- '0';
1168 /* Toss to the next non-digit. */
1170 if (v_key(sp
, vp
, 0,
1171 EC_MAPCOMMAND
| EC_MAPNODIGIT
) != GC_OK
)
1173 } while (ISDIGIT(vp
->ev
.e_c
));
1175 "235|Number larger than %lu", ULONG_MAX
);
1179 if (v_key(sp
, vp
, 0, EC_MAPCOMMAND
| EC_MAPNODIGIT
) != GC_OK
)
1181 } while (ISDIGIT(vp
->ev
.e_c
));
1188 * Return the next event.
1191 v_key(sp
, vp
, events_ok
, ec_flags
)
1200 for (evp
= &vp
->ev
, quote
= 0;;) {
1201 if (v_event_get(sp
, evp
, 0, ec_flags
| quote
))
1205 switch (evp
->e_event
) {
1209 * Historically, ^V was ignored in the command stream,
1210 * although it had a useful side-effect of interrupting
1211 * mappings. Adding a quoting bit to the call probably
1212 * extends historic practice, but it feels right.
1214 if (evp
->e_value
== K_VLNEXT
) {
1225 * Historically, vi beeped on command level interrupts.
1227 * Historically, vi exited to ex mode if no file was
1228 * named on the command line, and two interrupts were
1229 * generated in a row. (I figured you might want to
1230 * know that, just in case there's a quiz later.)
1232 (void)sp
->gp
->scr_bell(sp
);
1233 return (GC_INTERRUPT
);
1235 if (v_erepaint(sp
, evp
))
1241 * We don't do anything here, just return an error.
1242 * The vi loop will return because of this, and then
1243 * the main loop will realize that we had to restart
1244 * the world and will call the vi loop again.
1252 v_event_err(sp
, evp
);
1259 #if defined(DEBUG) && defined(COMLOG)
1262 * Log the contents of the command structure.
1269 vtrace(sp
, "vcmd: %c", vp
->key
);
1270 if (F_ISSET(vp
, VC_BUFFER
))
1271 vtrace(sp
, " buffer: %c", vp
->buffer
);
1272 if (F_ISSET(vp
, VC_C1SET
))
1273 vtrace(sp
, " c1: %lu", vp
->count
);
1274 if (F_ISSET(vp
, VC_C2SET
))
1275 vtrace(sp
, " c2: %lu", vp
->count2
);
1276 vtrace(sp
, " flags: 0x%x\n", vp
->flags
);