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vi.c revision 1.7
      1 /*	$NetBSD: vi.c,v 1.7 1999/07/02 15:21:28 simonb Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1992, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * This code is derived from software contributed to Berkeley by
      8  * Christos Zoulas of Cornell University.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *	This product includes software developed by the University of
     21  *	California, Berkeley and its contributors.
     22  * 4. Neither the name of the University nor the names of its contributors
     23  *    may be used to endorse or promote products derived from this software
     24  *    without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     36  * SUCH DAMAGE.
     37  */
     38 
     39 #include <sys/cdefs.h>
     40 #if !defined(lint) && !defined(SCCSID)
     41 #if 0
     42 static char sccsid[] = "@(#)vi.c	8.1 (Berkeley) 6/4/93";
     43 #else
     44 __RCSID("$NetBSD: vi.c,v 1.7 1999/07/02 15:21:28 simonb Exp $");
     45 #endif
     46 #endif /* not lint && not SCCSID */
     47 
     48 /*
     49  * vi.c: Vi mode commands.
     50  */
     51 #include "sys.h"
     52 #include "el.h"
     53 
     54 private el_action_t cv_action	__P((EditLine *, int));
     55 private el_action_t cv_paste	__P((EditLine *, int));
     56 
     57 /* cv_action():
     58  *	Handle vi actions.
     59  */
     60 private el_action_t
     61 cv_action(el, c)
     62     EditLine *el;
     63     int c;
     64 {
     65     char *cp, *kp;
     66 
     67     if (el->el_chared.c_vcmd.action & DELETE) {
     68 	el->el_chared.c_vcmd.action = NOP;
     69 	el->el_chared.c_vcmd.pos = 0;
     70 
     71 	el->el_chared.c_undo.isize = 0;
     72 	el->el_chared.c_undo.dsize = 0;
     73 	kp = el->el_chared.c_undo.buf;
     74 	for (cp = el->el_line.buffer; cp < el->el_line.lastchar; cp++) {
     75 	    *kp++ = *cp;
     76 	    el->el_chared.c_undo.dsize++;
     77 	}
     78 
     79 	el->el_chared.c_undo.action = INSERT;
     80 	el->el_chared.c_undo.ptr  = el->el_line.buffer;
     81 	el->el_line.lastchar = el->el_line.buffer;
     82 	el->el_line.cursor   = el->el_line.buffer;
     83 	if (c & INSERT)
     84 	    el->el_map.current = el->el_map.key;
     85 
     86 	return CC_REFRESH;
     87     }
     88 
     89     el->el_chared.c_vcmd.pos = el->el_line.cursor;
     90     el->el_chared.c_vcmd.action = c;
     91     return CC_ARGHACK;
     92 
     93 #ifdef notdef
     94     /*
     95      * I don't think that this is needed. But we keep it for now
     96      */
     97     else if (el_chared.c_vcmd.action == NOP) {
     98 	el->el_chared.c_vcmd.pos = el->el_line.cursor;
     99 	el->el_chared.c_vcmd.action = c;
    100 	return CC_ARGHACK;
    101     }
    102     else {
    103 	el->el_chared.c_vcmd.action = 0;
    104 	el->el_chared.c_vcmd.pos = 0;
    105 	return CC_ERROR;
    106     }
    107 #endif
    108 }
    109 
    110 
    111 /* cv_paste():
    112  *	Paste previous deletion before or after the cursor
    113  */
    114 private el_action_t
    115 cv_paste(el, c)
    116     EditLine *el;
    117     int c;
    118 {
    119     char *ptr;
    120     c_undo_t *un = &el->el_chared.c_undo;
    121 #ifdef DEBUG_PASTE
    122     (void) fprintf(el->el_errfile, "Paste: %x \"%s\" +%d -%d\n",
    123 		   un->action, un->buf, un->isize, un->dsize);
    124 #endif
    125     if (un->isize == 0)
    126 	return CC_ERROR;
    127 
    128     if (!c && el->el_line.cursor < el->el_line.lastchar)
    129 	el->el_line.cursor++;
    130     ptr = el->el_line.cursor;
    131 
    132     c_insert(el, (int)un->isize);
    133     if (el->el_line.cursor + un->isize > el->el_line.lastchar)
    134 	return CC_ERROR;
    135     (void) memcpy(ptr, un->buf, un->isize);
    136     return CC_REFRESH;
    137 }
    138 
    139 
    140 /* vi_paste_next():
    141  *	Vi paste previous deletion to the right of the cursor
    142  *	[p]
    143  */
    144 protected el_action_t
    145 /*ARGSUSED*/
    146 vi_paste_next(el, c)
    147     EditLine *el;
    148     int c;
    149 {
    150     return cv_paste(el, 0);
    151 }
    152 
    153 
    154 /* vi_paste_prev():
    155  *	Vi paste previous deletion to the left of the cursor
    156  *	[P]
    157  */
    158 protected el_action_t
    159 /*ARGSUSED*/
    160 vi_paste_prev(el, c)
    161     EditLine *el;
    162     int c;
    163 {
    164     return cv_paste(el, 1);
    165 }
    166 
    167 
    168 /* vi_prev_space_word():
    169  *	Vi move to the previous space delimited word
    170  *	[B]
    171  */
    172 protected el_action_t
    173 /*ARGSUSED*/
    174 vi_prev_space_word(el, c)
    175     EditLine *el;
    176     int c;
    177 {
    178     if (el->el_line.cursor == el->el_line.buffer)
    179 	return CC_ERROR;
    180 
    181     el->el_line.cursor = cv_prev_word(el, el->el_line.cursor,
    182 				      el->el_line.buffer,
    183 			 	      el->el_state.argument,
    184 				      cv__isword);
    185 
    186     if (el->el_chared.c_vcmd.action & DELETE) {
    187 	cv_delfini(el);
    188 	return CC_REFRESH;
    189     }
    190 
    191     return CC_CURSOR;
    192 }
    193 
    194 
    195 /* vi_prev_word():
    196  *	Vi move to the previous word
    197  *	[B]
    198  */
    199 protected el_action_t
    200 /*ARGSUSED*/
    201 vi_prev_word(el, c)
    202     EditLine *el;
    203     int c;
    204 {
    205     if (el->el_line.cursor == el->el_line.buffer)
    206 	return CC_ERROR;
    207 
    208     el->el_line.cursor = cv_prev_word(el, el->el_line.cursor,
    209 				      el->el_line.buffer,
    210 			 	      el->el_state.argument,
    211 				      ce__isword);
    212 
    213     if (el->el_chared.c_vcmd.action & DELETE) {
    214 	cv_delfini(el);
    215 	return CC_REFRESH;
    216     }
    217 
    218     return CC_CURSOR;
    219 }
    220 
    221 
    222 /* vi_next_space_word():
    223  *	Vi move to the next space delimited word
    224  *	[W]
    225  */
    226 protected el_action_t
    227 /*ARGSUSED*/
    228 vi_next_space_word(el, c)
    229     EditLine *el;
    230     int c;
    231 {
    232     if (el->el_line.cursor == el->el_line.lastchar)
    233 	return CC_ERROR;
    234 
    235     el->el_line.cursor = cv_next_word(el, el->el_line.cursor,
    236 				      el->el_line.lastchar,
    237 				      el->el_state.argument,
    238 				      cv__isword);
    239 
    240     if (el->el_map.type == MAP_VI)
    241 	if (el->el_chared.c_vcmd.action & DELETE) {
    242 	    cv_delfini(el);
    243 	    return CC_REFRESH;
    244 	}
    245 
    246     return CC_CURSOR;
    247 }
    248 
    249 /* vi_next_word():
    250  *	Vi move to the next word
    251  *	[w]
    252  */
    253 protected el_action_t
    254 /*ARGSUSED*/
    255 vi_next_word(el, c)
    256     EditLine *el;
    257     int c;
    258 {
    259     if (el->el_line.cursor == el->el_line.lastchar)
    260 	return CC_ERROR;
    261 
    262     el->el_line.cursor = cv_next_word(el, el->el_line.cursor,
    263 				      el->el_line.lastchar,
    264 				      el->el_state.argument,
    265 				      ce__isword);
    266 
    267     if (el->el_map.type == MAP_VI)
    268 	if (el->el_chared.c_vcmd.action & DELETE) {
    269 	    cv_delfini(el);
    270 	    return CC_REFRESH;
    271 	}
    272 
    273     return CC_CURSOR;
    274 }
    275 
    276 
    277 
    278 /* vi_change_case():
    279  *	Vi change case of character under the cursor and advance one character
    280  *	[~]
    281  */
    282 protected el_action_t
    283 vi_change_case(el, c)
    284     EditLine *el;
    285     int c;
    286 {
    287     if (el->el_line.cursor < el->el_line.lastchar) {
    288 	c = *el->el_line.cursor;
    289 	if (isupper(c))
    290 	    *el->el_line.cursor++ = tolower(c);
    291 	else if (islower(c))
    292 	    *el->el_line.cursor++ = toupper(c);
    293 	else
    294 	    el->el_line.cursor++;
    295 	re_fastaddc(el);
    296 	return CC_NORM;
    297     }
    298     return CC_ERROR;
    299 }
    300 
    301 
    302 /* vi_change_meta():
    303  *	Vi change prefix command
    304  *	[c]
    305  */
    306 protected el_action_t
    307 /*ARGSUSED*/
    308 vi_change_meta(el, c)
    309     EditLine *el;
    310     int c;
    311 {
    312     /*
    313      * Delete with insert == change: first we delete and then we leave in
    314      * insert mode.
    315      */
    316     return cv_action(el, DELETE|INSERT);
    317 }
    318 
    319 
    320 /* vi_insert_at_bol():
    321  *	Vi enter insert mode at the beginning of line
    322  *	[I]
    323  */
    324 protected el_action_t
    325 /*ARGSUSED*/
    326 vi_insert_at_bol(el, c)
    327     EditLine *el;
    328     int c;
    329 {
    330     el->el_line.cursor = el->el_line.buffer;
    331     el->el_chared.c_vcmd.ins = el->el_line.cursor;
    332 
    333     el->el_chared.c_undo.ptr = el->el_line.cursor;
    334     el->el_chared.c_undo.action = DELETE;
    335 
    336     el->el_map.current = el->el_map.key;
    337     return CC_CURSOR;
    338 }
    339 
    340 
    341 /* vi_replace_char():
    342  *	Vi replace character under the cursor with the next character typed
    343  *	[r]
    344  */
    345 protected el_action_t
    346 /*ARGSUSED*/
    347 vi_replace_char(el, c)
    348     EditLine *el;
    349     int c;
    350 {
    351     el->el_map.current = el->el_map.key;
    352     el->el_state.inputmode = MODE_REPLACE_1;
    353     el->el_chared.c_undo.action = CHANGE;
    354     el->el_chared.c_undo.ptr = el->el_line.cursor;
    355     el->el_chared.c_undo.isize = 0;
    356     el->el_chared.c_undo.dsize = 0;
    357     return CC_NORM;
    358 }
    359 
    360 
    361 /* vi_replace_mode():
    362  *	Vi enter replace mode
    363  *	[R]
    364  */
    365 protected el_action_t
    366 /*ARGSUSED*/
    367 vi_replace_mode(el, c)
    368     EditLine *el;
    369     int c;
    370 {
    371     el->el_map.current = el->el_map.key;
    372     el->el_state.inputmode = MODE_REPLACE;
    373     el->el_chared.c_undo.action = CHANGE;
    374     el->el_chared.c_undo.ptr = el->el_line.cursor;
    375     el->el_chared.c_undo.isize = 0;
    376     el->el_chared.c_undo.dsize = 0;
    377     return CC_NORM;
    378 }
    379 
    380 
    381 /* vi_substitute_char():
    382  *	Vi replace character under the cursor and enter insert mode
    383  *	[r]
    384  */
    385 protected el_action_t
    386 /*ARGSUSED*/
    387 vi_substitute_char(el, c)
    388     EditLine *el;
    389     int c;
    390 {
    391     c_delafter(el, el->el_state.argument);
    392     el->el_map.current = el->el_map.key;
    393     return CC_REFRESH;
    394 }
    395 
    396 
    397 /* vi_substitute_line():
    398  *	Vi substitute entire line
    399  *	[S]
    400  */
    401 protected el_action_t
    402 /*ARGSUSED*/
    403 vi_substitute_line(el, c)
    404     EditLine *el;
    405     int c;
    406 {
    407     (void) em_kill_line(el, 0);
    408     el->el_map.current = el->el_map.key;
    409     return CC_REFRESH;
    410 }
    411 
    412 
    413 /* vi_change_to_eol():
    414  *	Vi change to end of line
    415  *	[C]
    416  */
    417 protected el_action_t
    418 /*ARGSUSED*/
    419 vi_change_to_eol(el, c)
    420     EditLine *el;
    421     int c;
    422 {
    423     (void) ed_kill_line(el, 0);
    424     el->el_map.current = el->el_map.key;
    425     return CC_REFRESH;
    426 }
    427 
    428 
    429 /* vi_insert():
    430  *	Vi enter insert mode
    431  *	[i]
    432  */
    433 protected el_action_t
    434 /*ARGSUSED*/
    435 vi_insert(el, c)
    436     EditLine *el;
    437     int c;
    438 {
    439     el->el_map.current = el->el_map.key;
    440 
    441     el->el_chared.c_vcmd.ins = el->el_line.cursor;
    442     el->el_chared.c_undo.ptr = el->el_line.cursor;
    443     el->el_chared.c_undo.action = DELETE;
    444 
    445     return CC_NORM;
    446 }
    447 
    448 
    449 /* vi_add():
    450  *	Vi enter insert mode after the cursor
    451  *	[a]
    452  */
    453 protected el_action_t
    454 /*ARGSUSED*/
    455 vi_add(el, c)
    456     EditLine *el;
    457     int c;
    458 {
    459     int ret;
    460     el->el_map.current = el->el_map.key;
    461     if (el->el_line.cursor < el->el_line.lastchar) {
    462 	el->el_line.cursor++;
    463 	if (el->el_line.cursor > el->el_line.lastchar)
    464 	    el->el_line.cursor = el->el_line.lastchar;
    465 	ret = CC_CURSOR;
    466     }
    467     else
    468 	ret = CC_NORM;
    469 
    470     el->el_chared.c_vcmd.ins = el->el_line.cursor;
    471     el->el_chared.c_undo.ptr = el->el_line.cursor;
    472     el->el_chared.c_undo.action = DELETE;
    473 
    474     return ret;
    475 }
    476 
    477 
    478 /* vi_add_at_eol():
    479  *	Vi enter insert mode at end of line
    480  *	[A]
    481  */
    482 protected el_action_t
    483 /*ARGSUSED*/
    484 vi_add_at_eol(el, c)
    485     EditLine *el;
    486     int c;
    487 {
    488     el->el_map.current = el->el_map.key;
    489     el->el_line.cursor = el->el_line.lastchar;
    490 
    491     /* Mark where insertion begins */
    492     el->el_chared.c_vcmd.ins = el->el_line.lastchar;
    493     el->el_chared.c_undo.ptr = el->el_line.lastchar;
    494     el->el_chared.c_undo.action = DELETE;
    495     return CC_CURSOR;
    496 }
    497 
    498 
    499 /* vi_delete_meta():
    500  *	Vi delete prefix command
    501  *	[d]
    502  */
    503 protected el_action_t
    504 /*ARGSUSED*/
    505 vi_delete_meta(el, c)
    506     EditLine *el;
    507     int c;
    508 {
    509     return cv_action(el, DELETE);
    510 }
    511 
    512 
    513 /* vi_end_word():
    514  *	Vi move to the end of the current space delimited word
    515  *	[E]
    516  */
    517 protected el_action_t
    518 /*ARGSUSED*/
    519 vi_end_word(el, c)
    520     EditLine *el;
    521     int c;
    522 {
    523     if (el->el_line.cursor == el->el_line.lastchar)
    524 	return CC_ERROR;
    525 
    526     el->el_line.cursor = cv__endword(el->el_line.cursor, el->el_line.lastchar,
    527 				     el->el_state.argument);
    528 
    529     if (el->el_chared.c_vcmd.action & DELETE) {
    530 	el->el_line.cursor++;
    531 	cv_delfini(el);
    532 	return CC_REFRESH;
    533     }
    534 
    535     return CC_CURSOR;
    536 }
    537 
    538 
    539 /* vi_to_end_word():
    540  *	Vi move to the end of the current word
    541  *	[e]
    542  */
    543 protected el_action_t
    544 /*ARGSUSED*/
    545 vi_to_end_word(el, c)
    546     EditLine *el;
    547     int c;
    548 {
    549     if (el->el_line.cursor == el->el_line.lastchar)
    550 	return CC_ERROR;
    551 
    552     el->el_line.cursor = cv__endword(el->el_line.cursor, el->el_line.lastchar,
    553 				     el->el_state.argument);
    554 
    555     if (el->el_chared.c_vcmd.action & DELETE) {
    556 	el->el_line.cursor++;
    557 	cv_delfini(el);
    558 	return CC_REFRESH;
    559     }
    560 
    561     return CC_CURSOR;
    562 }
    563 
    564 
    565 /* vi_undo():
    566  *	Vi undo last change
    567  *	[u]
    568  */
    569 protected el_action_t
    570 /*ARGSUSED*/
    571 vi_undo(el, c)
    572     EditLine *el;
    573     int c;
    574 {
    575     char *cp, *kp;
    576     char temp;
    577     int	 i, size;
    578     c_undo_t *un = &el->el_chared.c_undo;
    579 
    580 #ifdef DEBUG_UNDO
    581     (void) fprintf(el->el_errfile, "Undo: %x \"%s\" +%d -%d\n",
    582 		   un->action, un->buf, un->isize, un->dsize);
    583 #endif
    584     switch (un->action) {
    585     case DELETE:
    586 	if (un->dsize == 0)
    587 	    return CC_NORM;
    588 
    589 	(void) memcpy(un->buf, un->ptr, un->dsize);
    590 	for (cp = un->ptr; cp <= el->el_line.lastchar; cp++)
    591 	    *cp = cp[un->dsize];
    592 
    593 	el->el_line.lastchar -= un->dsize;
    594 	el->el_line.cursor   =  un->ptr;
    595 
    596 	un->action = INSERT;
    597 	un->isize = un->dsize;
    598 	un->dsize = 0;
    599 	break;
    600 
    601     case DELETE|INSERT:
    602 	size = un->isize - un->dsize;
    603 	if (size > 0)
    604 	    i = un->dsize;
    605 	else
    606 	    i = un->isize;
    607 	cp = un->ptr;
    608 	kp = un->buf;
    609 	while (i-- > 0) {
    610 	    temp = *kp;
    611 	    *kp++ = *cp;
    612 	    *cp++ = temp;
    613 	}
    614 	if (size > 0) {
    615 	    el->el_line.cursor = cp;
    616 	    c_insert(el, size);
    617 	    while (size-- > 0 && cp < el->el_line.lastchar) {
    618 		temp = *kp;
    619 		*kp++ = *cp;
    620 		*cp++ = temp;
    621 	    }
    622 	}
    623 	else if (size < 0) {
    624 	    size = -size;
    625 	    for (; cp <= el->el_line.lastchar; cp++) {
    626 		*kp++ = *cp;
    627 		*cp = cp[size];
    628 	    }
    629 	    el->el_line.lastchar -= size;
    630 	}
    631 	el->el_line.cursor = un->ptr;
    632 	i = un->dsize;
    633 	un->dsize = un->isize;
    634 	un->isize = i;
    635 	break;
    636 
    637     case INSERT:
    638 	if (un->isize == 0)
    639 	    return CC_NORM;
    640 
    641 	el->el_line.cursor = un->ptr;
    642 	c_insert(el, (int)un->isize);
    643 	(void) memcpy(un->ptr, un->buf, un->isize);
    644 	un->action = DELETE;
    645 	un->dsize = un->isize;
    646 	un->isize = 0;
    647 	break;
    648 
    649     case CHANGE:
    650 	if (un->isize == 0)
    651 	    return CC_NORM;
    652 
    653 	el->el_line.cursor = un->ptr;
    654 	size = (int) (el->el_line.cursor - el->el_line.lastchar);
    655 	if (size < un->isize)
    656 	    size = un->isize;
    657 	cp = un->ptr;
    658 	kp = un->buf;
    659 	for(i = 0; i < size; i++) {
    660 	    temp = *kp;
    661 	    *kp++ = *cp;
    662 	    *cp++ = temp;
    663 	}
    664 	un->dsize = 0;
    665 	break;
    666 
    667     default:
    668 	return CC_ERROR;
    669     }
    670 
    671     return CC_REFRESH;
    672 }
    673 
    674 
    675 /* vi_command_mode():
    676  *	Vi enter command mode (use alternative key bindings)
    677  *	[<ESC>]
    678  */
    679 protected el_action_t
    680 /*ARGSUSED*/
    681 vi_command_mode(el, c)
    682     EditLine *el;
    683     int c;
    684 {
    685     int size;
    686     /* [Esc] cancels pending action */
    687     el->el_chared.c_vcmd.ins = 0;
    688     el->el_chared.c_vcmd.action = NOP;
    689     el->el_chared.c_vcmd.pos = 0;
    690 
    691     el->el_state.doingarg = 0;
    692     size = el->el_chared.c_undo.ptr - el->el_line.cursor;
    693     if (size < 0)
    694 	size = -size;
    695     if (el->el_chared.c_undo.action == (INSERT|DELETE) ||
    696         el->el_chared.c_undo.action == DELETE)
    697 	el->el_chared.c_undo.dsize = size;
    698     else
    699 	el->el_chared.c_undo.isize = size;
    700 
    701     el->el_state.inputmode = MODE_INSERT;
    702     el->el_map.current = el->el_map.alt;
    703 #ifdef VI_MOVE
    704     if (el->el_line.cursor > el->el_line.buffer)
    705 	el->el_line.cursor--;
    706 #endif
    707     return CC_CURSOR;
    708 }
    709 
    710 /* vi_zero():
    711  *	Vi move to the beginning of line
    712  *	[0]
    713  */
    714 protected el_action_t
    715 vi_zero(el, c)
    716     EditLine *el;
    717     int c;
    718 {
    719     if (el->el_state.doingarg) {
    720 	if (el->el_state.argument > 1000000)
    721 	    return CC_ERROR;
    722 	el->el_state.argument =
    723 		(el->el_state.argument * 10) + (c - '0');
    724 	return CC_ARGHACK;
    725     }
    726     else {
    727 	el->el_line.cursor = el->el_line.buffer;
    728 	if (el->el_chared.c_vcmd.action & DELETE) {
    729 	   cv_delfini(el);
    730 	   return CC_REFRESH;
    731         }
    732 	return CC_CURSOR;
    733     }
    734 }
    735 
    736 
    737 /* vi_delete_prev_char():
    738  * 	Vi move to previous character (backspace)
    739  *	[^H]
    740  */
    741 protected el_action_t
    742 /*ARGSUSED*/
    743 vi_delete_prev_char(el, c)
    744     EditLine *el;
    745     int c;
    746 {
    747     if (el->el_chared.c_vcmd.ins == 0)
    748 	return CC_ERROR;
    749 
    750     if (el->el_chared.c_vcmd.ins >
    751 	el->el_line.cursor - el->el_state.argument)
    752 	return CC_ERROR;
    753 
    754     c_delbefore(el, el->el_state.argument);
    755     el->el_line.cursor -= el->el_state.argument;
    756 
    757     return CC_REFRESH;
    758 } /* end v_del_char_prev  */
    759 
    760 
    761 /* vi_list_or_eof():
    762  *	Vi list choices for completion or indicate end of file if empty line
    763  *	[^D]
    764  */
    765 protected el_action_t
    766 /*ARGSUSED*/
    767 vi_list_or_eof(el, c)
    768     EditLine *el;
    769     int c;
    770 {
    771 #ifdef notyet
    772     if (el->el_line.cursor == el->el_line.lastchar &&
    773 	el->el_line.cursor == el->el_line.buffer) {
    774 #endif
    775 	term_overwrite(el, STReof, 4);	/* then do a EOF */
    776 	term__flush();
    777 	return CC_EOF;
    778 #ifdef notyet
    779     }
    780     else {
    781 	re_goto_bottom(el);
    782 	*el->el_line.lastchar = '\0';	/* just in case */
    783 	return CC_LIST_CHOICES;
    784     }
    785 #endif
    786 }
    787 
    788 
    789 /* vi_kill_line_prev():
    790  *	Vi cut from beginning of line to cursor
    791  *	[^U]
    792  */
    793 protected el_action_t
    794 /*ARGSUSED*/
    795 vi_kill_line_prev(el, c)
    796     EditLine *el;
    797     int c;
    798 {
    799     char *kp, *cp;
    800 
    801     cp = el->el_line.buffer;
    802     kp = el->el_chared.c_kill.buf;
    803     while (cp < el->el_line.cursor)
    804 	*kp++ = *cp++;		/* copy it */
    805     el->el_chared.c_kill.last = kp;
    806     c_delbefore(el, el->el_line.cursor - el->el_line.buffer);
    807     el->el_line.cursor = el->el_line.buffer;		/* zap! */
    808     return CC_REFRESH;
    809 }
    810 
    811 
    812 /* vi_search_prev():
    813  *	Vi search history previous
    814  *	[?]
    815  */
    816 protected el_action_t
    817 /*ARGSUSED*/
    818 vi_search_prev(el, c)
    819     EditLine *el;
    820     int c;
    821 {
    822     return cv_search(el, ED_SEARCH_PREV_HISTORY);
    823 }
    824 
    825 
    826 /* vi_search_next():
    827  *	Vi search history next
    828  *	[/]
    829  */
    830 protected el_action_t
    831 /*ARGSUSED*/
    832 vi_search_next(el, c)
    833     EditLine *el;
    834     int c;
    835 {
    836     return cv_search(el, ED_SEARCH_NEXT_HISTORY);
    837 }
    838 
    839 
    840 /* vi_repeat_search_next():
    841  *	Vi repeat current search in the same search direction
    842  *	[n]
    843  */
    844 protected el_action_t
    845 /*ARGSUSED*/
    846 vi_repeat_search_next(el, c)
    847     EditLine *el;
    848     int c;
    849 {
    850     if (el->el_search.patlen == 0)
    851 	return CC_ERROR;
    852     else
    853 	return cv_repeat_srch(el, el->el_search.patdir);
    854 }
    855 
    856 
    857 /* vi_repeat_search_prev():
    858  *	Vi repeat current search in the opposite search direction
    859  *	[N]
    860  */
    861 /*ARGSUSED*/
    862 protected el_action_t
    863 vi_repeat_search_prev(el, c)
    864     EditLine *el;
    865     int c;
    866 {
    867     if (el->el_search.patlen == 0)
    868 	return CC_ERROR;
    869     else
    870 	return cv_repeat_srch(el,
    871 			      el->el_search.patdir == ED_SEARCH_PREV_HISTORY ?
    872 			      ED_SEARCH_NEXT_HISTORY : ED_SEARCH_PREV_HISTORY);
    873 }
    874 
    875 
    876 /* vi_next_char():
    877  *	Vi move to the character specified next
    878  *	[f]
    879  */
    880 protected el_action_t
    881 /*ARGSUSED*/
    882 vi_next_char(el, c)
    883     EditLine *el;
    884     int c;
    885 {
    886     char ch;
    887 
    888     if (el_getc(el, &ch) != 1)
    889 	return ed_end_of_file(el, 0);
    890 
    891     el->el_search.chadir = CHAR_FWD;
    892     el->el_search.chacha = ch;
    893 
    894     return cv_csearch_fwd(el, ch, el->el_state.argument, 0);
    895 
    896 }
    897 
    898 
    899 /* vi_prev_char():
    900  *	Vi move to the character specified previous
    901  *	[F]
    902  */
    903 protected el_action_t
    904 /*ARGSUSED*/
    905 vi_prev_char(el, c)
    906     EditLine *el;
    907     int c;
    908 {
    909     char ch;
    910 
    911     if (el_getc(el, &ch) != 1)
    912 	return ed_end_of_file(el, 0);
    913 
    914     el->el_search.chadir = CHAR_BACK;
    915     el->el_search.chacha = ch;
    916 
    917     return cv_csearch_back(el, ch, el->el_state.argument, 0);
    918 }
    919 
    920 
    921 /* vi_to_next_char():
    922  *	Vi move up to the character specified next
    923  *	[t]
    924  */
    925 protected el_action_t
    926 /*ARGSUSED*/
    927 vi_to_next_char(el, c)
    928     EditLine *el;
    929     int c;
    930 {
    931     char ch;
    932 
    933     if (el_getc(el, &ch) != 1)
    934 	return ed_end_of_file(el, 0);
    935 
    936     return cv_csearch_fwd(el, ch, el->el_state.argument, 1);
    937 
    938 }
    939 
    940 
    941 /* vi_to_prev_char():
    942  *	Vi move up to the character specified previous
    943  *	[T]
    944  */
    945 protected el_action_t
    946 /*ARGSUSED*/
    947 vi_to_prev_char(el, c)
    948     EditLine *el;
    949     int c;
    950 {
    951     char ch;
    952     if (el_getc(el, &ch) != 1)
    953 	return ed_end_of_file(el, 0);
    954 
    955     return cv_csearch_back(el, ch, el->el_state.argument, 1);
    956 }
    957 
    958 
    959 /* vi_repeat_next_char():
    960  *	Vi repeat current character search in the same search direction
    961  *	[;]
    962  */
    963 protected el_action_t
    964 /*ARGSUSED*/
    965 vi_repeat_next_char(el, c)
    966     EditLine *el;
    967     int c;
    968 {
    969     if (el->el_search.chacha == 0)
    970 	return CC_ERROR;
    971 
    972     return el->el_search.chadir == CHAR_FWD ?
    973 	cv_csearch_fwd(el, el->el_search.chacha, el->el_state.argument, 0) :
    974         cv_csearch_back(el, el->el_search.chacha, el->el_state.argument, 0);
    975 }
    976 
    977 
    978 /* vi_repeat_prev_char():
    979  *	Vi repeat current character search in the opposite search direction
    980  *	[,]
    981  */
    982 protected el_action_t
    983 /*ARGSUSED*/
    984 vi_repeat_prev_char(el, c)
    985     EditLine *el;
    986     int c;
    987 {
    988     if (el->el_search.chacha == 0)
    989 	return CC_ERROR;
    990 
    991     return el->el_search.chadir == CHAR_BACK ?
    992 	cv_csearch_fwd(el, el->el_search.chacha, el->el_state.argument, 0) :
    993         cv_csearch_back(el, el->el_search.chacha, el->el_state.argument, 0);
    994 }
    995