1/*-
2 * Copyright (c) 1992, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Christos Zoulas of Cornell University.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * $NetBSD: emacs.c,v 1.19 2004/10/28 21:14:52 dsl Exp $
33 */
34
35#if !defined(lint) && !defined(SCCSID)
36static char sccsid[] = "@(#)emacs.c 8.1 (Berkeley) 6/4/93";
37#endif /* not lint && not SCCSID */
38#include <sys/cdefs.h>
39__FBSDID("$FreeBSD: head/lib/libedit/emacs.c 148834 2005-08-07 20:55:59Z stefanf $");
40
41/*
42 * emacs.c: Emacs functions
43 */
44#include "sys.h"
45#include "el.h"
46
47/* em_delete_or_list():
48 * Delete character under cursor or list completions if at end of line
49 * [^D]
50 */
51protected el_action_t
52/*ARGSUSED*/
53em_delete_or_list(EditLine *el, int c __unused)
54{
55
56 if (el->el_line.cursor == el->el_line.lastchar) {
57 /* if I'm at the end */
58 if (el->el_line.cursor == el->el_line.buffer) {
59 /* and the beginning */
60 term_overwrite(el, STReof, 4); /* then do an EOF */
61 term__flush();
62 return (CC_EOF);
63 } else {
64 /*
65 * Here we could list completions, but it is an
66 * error right now
67 */
68 term_beep(el);
69 return (CC_ERROR);
70 }
71 } else {
72 if (el->el_state.doingarg)
73 c_delafter(el, el->el_state.argument);
74 else
75 c_delafter1(el);
76 if (el->el_line.cursor > el->el_line.lastchar)
77 el->el_line.cursor = el->el_line.lastchar;
78 /* bounds check */
79 return (CC_REFRESH);
80 }
81}
82
83
84/* em_delete_next_word():
85 * Cut from cursor to end of current word
86 * [M-d]
87 */
88protected el_action_t
89/*ARGSUSED*/
90em_delete_next_word(EditLine *el, int c __unused)
91{
92 char *cp, *p, *kp;
93
94 if (el->el_line.cursor == el->el_line.lastchar)
95 return (CC_ERROR);
96
97 cp = c__next_word(el->el_line.cursor, el->el_line.lastchar,
98 el->el_state.argument, ce__isword);
99
100 for (p = el->el_line.cursor, kp = el->el_chared.c_kill.buf; p < cp; p++)
101 /* save the text */
102 *kp++ = *p;
103 el->el_chared.c_kill.last = kp;
104
105 c_delafter(el, cp - el->el_line.cursor); /* delete after dot */
106 if (el->el_line.cursor > el->el_line.lastchar)
107 el->el_line.cursor = el->el_line.lastchar;
108 /* bounds check */
109 return (CC_REFRESH);
110}
111
112
113/* em_yank():
114 * Paste cut buffer at cursor position
115 * [^Y]
116 */
117protected el_action_t
118/*ARGSUSED*/
119em_yank(EditLine *el, int c __unused)
120{
121 char *kp, *cp;
122
123 if (el->el_chared.c_kill.last == el->el_chared.c_kill.buf)
124 return (CC_NORM);
125
126 if (el->el_line.lastchar +
127 (el->el_chared.c_kill.last - el->el_chared.c_kill.buf) >=
128 el->el_line.limit)
129 return (CC_ERROR);
130
131 el->el_chared.c_kill.mark = el->el_line.cursor;
132 cp = el->el_line.cursor;
133
134 /* open the space, */
135 c_insert(el, el->el_chared.c_kill.last - el->el_chared.c_kill.buf);
136 /* copy the chars */
137 for (kp = el->el_chared.c_kill.buf; kp < el->el_chared.c_kill.last; kp++)
138 *cp++ = *kp;
139
140 /* if an arg, cursor at beginning else cursor at end */
141 if (el->el_state.argument == 1)
142 el->el_line.cursor = cp;
143
144 return (CC_REFRESH);
145}
146
147
148/* em_kill_line():
149 * Cut the entire line and save in cut buffer
150 * [^U]
151 */
152protected el_action_t
153/*ARGSUSED*/
154em_kill_line(EditLine *el, int c __unused)
155{
156 char *kp, *cp;
157
158 cp = el->el_line.buffer;
159 kp = el->el_chared.c_kill.buf;
160 while (cp < el->el_line.lastchar)
161 *kp++ = *cp++; /* copy it */
162 el->el_chared.c_kill.last = kp;
163 /* zap! -- delete all of it */
164 el->el_line.lastchar = el->el_line.buffer;
165 el->el_line.cursor = el->el_line.buffer;
166 return (CC_REFRESH);
167}
168
169
170/* em_kill_region():
171 * Cut area between mark and cursor and save in cut buffer
172 * [^W]
173 */
174protected el_action_t
175/*ARGSUSED*/
176em_kill_region(EditLine *el, int c __unused)
177{
178 char *kp, *cp;
179
180 if (!el->el_chared.c_kill.mark)
181 return (CC_ERROR);
182
183 if (el->el_chared.c_kill.mark > el->el_line.cursor) {
184 cp = el->el_line.cursor;
185 kp = el->el_chared.c_kill.buf;
186 while (cp < el->el_chared.c_kill.mark)
187 *kp++ = *cp++; /* copy it */
188 el->el_chared.c_kill.last = kp;
189 c_delafter(el, cp - el->el_line.cursor);
190 } else { /* mark is before cursor */
191 cp = el->el_chared.c_kill.mark;
192 kp = el->el_chared.c_kill.buf;
193 while (cp < el->el_line.cursor)
194 *kp++ = *cp++; /* copy it */
195 el->el_chared.c_kill.last = kp;
196 c_delbefore(el, cp - el->el_chared.c_kill.mark);
197 el->el_line.cursor = el->el_chared.c_kill.mark;
198 }
199 return (CC_REFRESH);
200}
201
202
203/* em_copy_region():
204 * Copy area between mark and cursor to cut buffer
205 * [M-W]
206 */
207protected el_action_t
208/*ARGSUSED*/
209em_copy_region(EditLine *el, int c __unused)
210{
211 char *kp, *cp;
212
213 if (!el->el_chared.c_kill.mark)
214 return (CC_ERROR);
215
216 if (el->el_chared.c_kill.mark > el->el_line.cursor) {
217 cp = el->el_line.cursor;
218 kp = el->el_chared.c_kill.buf;
219 while (cp < el->el_chared.c_kill.mark)
220 *kp++ = *cp++; /* copy it */
221 el->el_chared.c_kill.last = kp;
222 } else {
223 cp = el->el_chared.c_kill.mark;
224 kp = el->el_chared.c_kill.buf;
225 while (cp < el->el_line.cursor)
226 *kp++ = *cp++; /* copy it */
227 el->el_chared.c_kill.last = kp;
228 }
229 return (CC_NORM);
230}
231
232
233/* em_gosmacs_transpose():
234 * Exchange the two characters before the cursor
235 * Gosling emacs transpose chars [^T]
236 */
237protected el_action_t
238em_gosmacs_transpose(EditLine *el, int c)
239{
240
241 if (el->el_line.cursor > &el->el_line.buffer[1]) {
242 /* must have at least two chars entered */
243 c = el->el_line.cursor[-2];
244 el->el_line.cursor[-2] = el->el_line.cursor[-1];
245 el->el_line.cursor[-1] = c;
246 return (CC_REFRESH);
247 } else
248 return (CC_ERROR);
249}
250
251
252/* em_next_word():
253 * Move next to end of current word
254 * [M-f]
255 */
256protected el_action_t
257/*ARGSUSED*/
258em_next_word(EditLine *el, int c __unused)
259{
260 if (el->el_line.cursor == el->el_line.lastchar)
261 return (CC_ERROR);
262
263 el->el_line.cursor = c__next_word(el->el_line.cursor,
264 el->el_line.lastchar,
265 el->el_state.argument,
266 ce__isword);
267
268 if (el->el_map.type == MAP_VI)
269 if (el->el_chared.c_vcmd.action != NOP) {
270 cv_delfini(el);
271 return (CC_REFRESH);
272 }
273 return (CC_CURSOR);
274}
275
276
277/* em_upper_case():
278 * Uppercase the characters from cursor to end of current word
279 * [M-u]
280 */
281protected el_action_t
282/*ARGSUSED*/
283em_upper_case(EditLine *el, int c __unused)
284{
285 char *cp, *ep;
286
287 ep = c__next_word(el->el_line.cursor, el->el_line.lastchar,
288 el->el_state.argument, ce__isword);
289
290 for (cp = el->el_line.cursor; cp < ep; cp++)
291 if (islower((unsigned char)*cp))
292 *cp = toupper((unsigned char)*cp);
293
294 el->el_line.cursor = ep;
295 if (el->el_line.cursor > el->el_line.lastchar)
296 el->el_line.cursor = el->el_line.lastchar;
297 return (CC_REFRESH);
298}
299
300
301/* em_capitol_case():
302 * Capitalize the characters from cursor to end of current word
303 * [M-c]
304 */
305protected el_action_t
306/*ARGSUSED*/
307em_capitol_case(EditLine *el, int c __unused)
308{
309 char *cp, *ep;
310
311 ep = c__next_word(el->el_line.cursor, el->el_line.lastchar,
312 el->el_state.argument, ce__isword);
313
314 for (cp = el->el_line.cursor; cp < ep; cp++) {
315 if (isalpha((unsigned char)*cp)) {
316 if (islower((unsigned char)*cp))
317 *cp = toupper((unsigned char)*cp);
318 cp++;
319 break;
320 }
321 }
322 for (; cp < ep; cp++)
323 if (isupper((unsigned char)*cp))
324 *cp = tolower((unsigned char)*cp);
325
326 el->el_line.cursor = ep;
327 if (el->el_line.cursor > el->el_line.lastchar)
328 el->el_line.cursor = el->el_line.lastchar;
329 return (CC_REFRESH);
330}
331
332
333/* em_lower_case():
334 * Lowercase the characters from cursor to end of current word
335 * [M-l]
336 */
337protected el_action_t
338/*ARGSUSED*/
339em_lower_case(EditLine *el, int c __unused)
340{
341 char *cp, *ep;
342
343 ep = c__next_word(el->el_line.cursor, el->el_line.lastchar,
344 el->el_state.argument, ce__isword);
345
346 for (cp = el->el_line.cursor; cp < ep; cp++)
347 if (isupper((unsigned char)*cp))
348 *cp = tolower((unsigned char)*cp);
349
350 el->el_line.cursor = ep;
351 if (el->el_line.cursor > el->el_line.lastchar)
352 el->el_line.cursor = el->el_line.lastchar;
353 return (CC_REFRESH);
354}
355
356
357/* em_set_mark():
358 * Set the mark at cursor
359 * [^@]
360 */
361protected el_action_t
362/*ARGSUSED*/
363em_set_mark(EditLine *el, int c __unused)
364{
365
366 el->el_chared.c_kill.mark = el->el_line.cursor;
367 return (CC_NORM);
368}
369
370
371/* em_exchange_mark():
372 * Exchange the cursor and mark
373 * [^X^X]
374 */
375protected el_action_t
376/*ARGSUSED*/
377em_exchange_mark(EditLine *el, int c __unused)
378{
379 char *cp;
380
381 cp = el->el_line.cursor;
382 el->el_line.cursor = el->el_chared.c_kill.mark;
383 el->el_chared.c_kill.mark = cp;
384 return (CC_CURSOR);
385}
386
387
388/* em_universal_argument():
389 * Universal argument (argument times 4)
390 * [^U]
391 */
392protected el_action_t
393/*ARGSUSED*/
394em_universal_argument(EditLine *el, int c __unused)
395{ /* multiply current argument by 4 */
396
397 if (el->el_state.argument > 1000000)
398 return (CC_ERROR);
399 el->el_state.doingarg = 1;
400 el->el_state.argument *= 4;
401 return (CC_ARGHACK);
402}
403
404
405/* em_meta_next():
406 * Add 8th bit to next character typed
407 * [<ESC>]
408 */
409protected el_action_t
410/*ARGSUSED*/
411em_meta_next(EditLine *el, int c __unused)
412{
413
414 el->el_state.metanext = 1;
415 return (CC_ARGHACK);
416}
417
418
419/* em_toggle_overwrite():
420 * Switch from insert to overwrite mode or vice versa
421 */
422protected el_action_t
423/*ARGSUSED*/
424em_toggle_overwrite(EditLine *el, int c __unused)
425{
426
427 el->el_state.inputmode = (el->el_state.inputmode == MODE_INSERT) ?
428 MODE_REPLACE : MODE_INSERT;
429 return (CC_NORM);
430}
431
432
433/* em_copy_prev_word():
434 * Copy current word to cursor
435 */
436protected el_action_t
437/*ARGSUSED*/
438em_copy_prev_word(EditLine *el, int c __unused)
439{
440 char *cp, *oldc, *dp;
441
442 if (el->el_line.cursor == el->el_line.buffer)
443 return (CC_ERROR);
444
445 oldc = el->el_line.cursor;
446 /* does a bounds check */
447 cp = c__prev_word(el->el_line.cursor, el->el_line.buffer,
448 el->el_state.argument, ce__isword);
449
450 c_insert(el, oldc - cp);
451 for (dp = oldc; cp < oldc && dp < el->el_line.lastchar; cp++)
452 *dp++ = *cp;
453
454 el->el_line.cursor = dp;/* put cursor at end */
455
456 return (CC_REFRESH);
457}
458
459
460/* em_inc_search_next():
461 * Emacs incremental next search
462 */
463protected el_action_t
464/*ARGSUSED*/
465em_inc_search_next(EditLine *el, int c __unused)
466{
467
468 el->el_search.patlen = 0;
469 return (ce_inc_search(el, ED_SEARCH_NEXT_HISTORY));
470}
471
472
473/* em_inc_search_prev():
474 * Emacs incremental reverse search
475 */
476protected el_action_t
477/*ARGSUSED*/
478em_inc_search_prev(EditLine *el, int c __unused)
479{
480
481 el->el_search.patlen = 0;
482 return (ce_inc_search(el, ED_SEARCH_PREV_HISTORY));
483}
484
485
486/* em_delete_prev_char():
487 * Delete the character to the left of the cursor
488 * [^?]
489 */
490protected el_action_t
491/*ARGSUSED*/
492em_delete_prev_char(EditLine *el, int c __unused)
493{
494
495 if (el->el_line.cursor <= el->el_line.buffer)
496 return (CC_ERROR);
497
498 if (el->el_state.doingarg)
499 c_delbefore(el, el->el_state.argument);
500 else
501 c_delbefore1(el);
502 el->el_line.cursor -= el->el_state.argument;
503 if (el->el_line.cursor < el->el_line.buffer)
504 el->el_line.cursor = el->el_line.buffer;
505 return (CC_REFRESH);
506}