summaryrefslogtreecommitdiff
path: root/cmd-line-utils/libedit/emacs.c
blob: 554d39704859606d2adf6c1d1bdb4270928a23e3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
/*	$NetBSD: emacs.c,v 1.25 2011/07/29 15:16:33 christos Exp $	*/

/*-
 * Copyright (c) 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Christos Zoulas of Cornell University.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "config.h"
#if !defined(lint) && !defined(SCCSID)
#if 0
static char sccsid[] = "@(#)emacs.c	8.1 (Berkeley) 6/4/93";
#else
#endif
#endif /* not lint && not SCCSID */

/*
 * emacs.c: Emacs functions
 */
#include "el.h"

/* em_delete_or_list():
 *	Delete character under cursor or list completions if at end of line
 *	[^D]
 */
protected el_action_t
/*ARGSUSED*/
em_delete_or_list(EditLine *el, Int c)
{

	if (el->el_line.cursor == el->el_line.lastchar) {
					/* if I'm at the end */
		if (el->el_line.cursor == el->el_line.buffer) {
					/* and the beginning */
			terminal_writec(el, c);	/* then do an EOF */
			return CC_EOF;
		} else {
			/*
			 * Here we could list completions, but it is an
			 * error right now
			 */
			terminal_beep(el);
			return CC_ERROR;
		}
	} else {
		if (el->el_state.doingarg)
			c_delafter(el, el->el_state.argument);
		else
			c_delafter1(el);
		if (el->el_line.cursor > el->el_line.lastchar)
			el->el_line.cursor = el->el_line.lastchar;
				/* bounds check */
		return CC_REFRESH;
	}
}


/* em_delete_next_word():
 *	Cut from cursor to end of current word
 *	[M-d]
 */
protected el_action_t
/*ARGSUSED*/
em_delete_next_word(EditLine *el, Int c __attribute__((__unused__)))
{
	Char *cp, *p, *kp;

	if (el->el_line.cursor == el->el_line.lastchar)
		return CC_ERROR;

	cp = c__next_word(el->el_line.cursor, el->el_line.lastchar,
	    el->el_state.argument, ce__isword);

	for (p = el->el_line.cursor, kp = el->el_chared.c_kill.buf; p < cp; p++)
				/* save the text */
		*kp++ = *p;
	el->el_chared.c_kill.last = kp;

	c_delafter(el, (int)(cp - el->el_line.cursor));	/* delete after dot */
	if (el->el_line.cursor > el->el_line.lastchar)
		el->el_line.cursor = el->el_line.lastchar;
				/* bounds check */
	return CC_REFRESH;
}


/* em_yank():
 *	Paste cut buffer at cursor position
 *	[^Y]
 */
protected el_action_t
/*ARGSUSED*/
em_yank(EditLine *el, Int c __attribute__((__unused__)))
{
	Char *kp, *cp;

	if (el->el_chared.c_kill.last == el->el_chared.c_kill.buf)
		return CC_NORM;

	if (el->el_line.lastchar +
	    (el->el_chared.c_kill.last - el->el_chared.c_kill.buf) >=
	    el->el_line.limit)
		return CC_ERROR;

	el->el_chared.c_kill.mark = el->el_line.cursor;
	cp = el->el_line.cursor;

	/* open the space, */
	c_insert(el,
	    (int)(el->el_chared.c_kill.last - el->el_chared.c_kill.buf));
	/* copy the chars */
	for (kp = el->el_chared.c_kill.buf; kp < el->el_chared.c_kill.last; kp++)
		*cp++ = *kp;

	/* if an arg, cursor at beginning else cursor at end */
	if (el->el_state.argument == 1)
		el->el_line.cursor = cp;

	return CC_REFRESH;
}


/* em_kill_line():
 *	Cut the entire line and save in cut buffer
 *	[^U]
 */
protected el_action_t
/*ARGSUSED*/
em_kill_line(EditLine *el, Int c __attribute__((__unused__)))
{
	Char *kp, *cp;

	cp = el->el_line.buffer;
	kp = el->el_chared.c_kill.buf;
	while (cp < el->el_line.lastchar)
		*kp++ = *cp++;	/* copy it */
	el->el_chared.c_kill.last = kp;
				/* zap! -- delete all of it */
	el->el_line.lastchar = el->el_line.buffer;
	el->el_line.cursor = el->el_line.buffer;
	return CC_REFRESH;
}


/* em_kill_region():
 *	Cut area between mark and cursor and save in cut buffer
 *	[^W]
 */
protected el_action_t
/*ARGSUSED*/
em_kill_region(EditLine *el, Int c __attribute__((__unused__)))
{
	Char *kp, *cp;

	if (!el->el_chared.c_kill.mark)
		return CC_ERROR;

	if (el->el_chared.c_kill.mark > el->el_line.cursor) {
		cp = el->el_line.cursor;
		kp = el->el_chared.c_kill.buf;
		while (cp < el->el_chared.c_kill.mark)
			*kp++ = *cp++;	/* copy it */
		el->el_chared.c_kill.last = kp;
		c_delafter(el, (int)(cp - el->el_line.cursor));
	} else {		/* mark is before cursor */
		cp = el->el_chared.c_kill.mark;
		kp = el->el_chared.c_kill.buf;
		while (cp < el->el_line.cursor)
			*kp++ = *cp++;	/* copy it */
		el->el_chared.c_kill.last = kp;
		c_delbefore(el, (int)(cp - el->el_chared.c_kill.mark));
		el->el_line.cursor = el->el_chared.c_kill.mark;
	}
	return CC_REFRESH;
}


/* em_copy_region():
 *	Copy area between mark and cursor to cut buffer
 *	[M-W]
 */
protected el_action_t
/*ARGSUSED*/
em_copy_region(EditLine *el, Int c __attribute__((__unused__)))
{
	Char *kp, *cp;

	if (!el->el_chared.c_kill.mark)
		return CC_ERROR;

	if (el->el_chared.c_kill.mark > el->el_line.cursor) {
		cp = el->el_line.cursor;
		kp = el->el_chared.c_kill.buf;
		while (cp < el->el_chared.c_kill.mark)
			*kp++ = *cp++;	/* copy it */
		el->el_chared.c_kill.last = kp;
	} else {
		cp = el->el_chared.c_kill.mark;
		kp = el->el_chared.c_kill.buf;
		while (cp < el->el_line.cursor)
			*kp++ = *cp++;	/* copy it */
		el->el_chared.c_kill.last = kp;
	}
	return CC_NORM;
}


/* em_gosmacs_transpose():
 *	Exchange the two characters before the cursor
 *	Gosling emacs transpose chars [^T]
 */
protected el_action_t
em_gosmacs_transpose(EditLine *el, Int c)
{

	if (el->el_line.cursor > &el->el_line.buffer[1]) {
		/* must have at least two chars entered */
		c = el->el_line.cursor[-2];
		el->el_line.cursor[-2] = el->el_line.cursor[-1];
		el->el_line.cursor[-1] = c;
		return CC_REFRESH;
	} else
		return CC_ERROR;
}


/* em_next_word():
 *	Move next to end of current word
 *	[M-f]
 */
protected el_action_t
/*ARGSUSED*/
em_next_word(EditLine *el, Int c __attribute__((__unused__)))
{
	if (el->el_line.cursor == el->el_line.lastchar)
		return CC_ERROR;

	el->el_line.cursor = c__next_word(el->el_line.cursor,
	    el->el_line.lastchar,
	    el->el_state.argument,
	    ce__isword);

	if (el->el_map.type == MAP_VI)
		if (el->el_chared.c_vcmd.action != NOP) {
			cv_delfini(el);
			return CC_REFRESH;
		}
	return CC_CURSOR;
}


/* em_upper_case():
 *	Uppercase the characters from cursor to end of current word
 *	[M-u]
 */
protected el_action_t
/*ARGSUSED*/
em_upper_case(EditLine *el, Int c __attribute__((__unused__)))
{
	Char *cp, *ep;

	ep = c__next_word(el->el_line.cursor, el->el_line.lastchar,
	    el->el_state.argument, ce__isword);

	for (cp = el->el_line.cursor; cp < ep; cp++)
		if (Islower(*cp))
			*cp = Toupper(*cp);

	el->el_line.cursor = ep;
	if (el->el_line.cursor > el->el_line.lastchar)
		el->el_line.cursor = el->el_line.lastchar;
	return CC_REFRESH;
}


/* em_capitol_case():
 *	Capitalize the characters from cursor to end of current word
 *	[M-c]
 */
protected el_action_t
/*ARGSUSED*/
em_capitol_case(EditLine *el, Int c __attribute__((__unused__)))
{
	Char *cp, *ep;

	ep = c__next_word(el->el_line.cursor, el->el_line.lastchar,
	    el->el_state.argument, ce__isword);

	for (cp = el->el_line.cursor; cp < ep; cp++) {
		if (Isalpha(*cp)) {
			if (Islower(*cp))
				*cp = Toupper(*cp);
			cp++;
			break;
		}
	}
	for (; cp < ep; cp++)
		if (Isupper(*cp))
			*cp = Tolower(*cp);

	el->el_line.cursor = ep;
	if (el->el_line.cursor > el->el_line.lastchar)
		el->el_line.cursor = el->el_line.lastchar;
	return CC_REFRESH;
}


/* em_lower_case():
 *	Lowercase the characters from cursor to end of current word
 *	[M-l]
 */
protected el_action_t
/*ARGSUSED*/
em_lower_case(EditLine *el, Int c __attribute__((__unused__)))
{
	Char *cp, *ep;

	ep = c__next_word(el->el_line.cursor, el->el_line.lastchar,
	    el->el_state.argument, ce__isword);

	for (cp = el->el_line.cursor; cp < ep; cp++)
		if (Isupper(*cp))
			*cp = Tolower(*cp);

	el->el_line.cursor = ep;
	if (el->el_line.cursor > el->el_line.lastchar)
		el->el_line.cursor = el->el_line.lastchar;
	return CC_REFRESH;
}


/* em_set_mark():
 *	Set the mark at cursor
 *	[^@]
 */
protected el_action_t
/*ARGSUSED*/
em_set_mark(EditLine *el, Int c __attribute__((__unused__)))
{

	el->el_chared.c_kill.mark = el->el_line.cursor;
	return CC_NORM;
}


/* em_exchange_mark():
 *	Exchange the cursor and mark
 *	[^X^X]
 */
protected el_action_t
/*ARGSUSED*/
em_exchange_mark(EditLine *el, Int c __attribute__((__unused__)))
{
	Char *cp;

	cp = el->el_line.cursor;
	el->el_line.cursor = el->el_chared.c_kill.mark;
	el->el_chared.c_kill.mark = cp;
	return CC_CURSOR;
}


/* em_universal_argument():
 *	Universal argument (argument times 4)
 *	[^U]
 */
protected el_action_t
/*ARGSUSED*/
em_universal_argument(EditLine *el, Int c __attribute__((__unused__)))
{				/* multiply current argument by 4 */

	if (el->el_state.argument > 1000000)
		return CC_ERROR;
	el->el_state.doingarg = 1;
	el->el_state.argument *= 4;
	return CC_ARGHACK;
}


/* em_meta_next():
 *	Add 8th bit to next character typed
 *	[<ESC>]
 */
protected el_action_t
/*ARGSUSED*/
em_meta_next(EditLine *el, Int c __attribute__((__unused__)))
{

	el->el_state.metanext = 1;
	return CC_ARGHACK;
}


/* em_toggle_overwrite():
 *	Switch from insert to overwrite mode or vice versa
 */
protected el_action_t
/*ARGSUSED*/
em_toggle_overwrite(EditLine *el, Int c __attribute__((__unused__)))
{

	el->el_state.inputmode = (el->el_state.inputmode == MODE_INSERT) ?
	    MODE_REPLACE : MODE_INSERT;
	return CC_NORM;
}


/* em_copy_prev_word():
 *	Copy current word to cursor
 */
protected el_action_t
/*ARGSUSED*/
em_copy_prev_word(EditLine *el, Int c __attribute__((__unused__)))
{
	Char *cp, *oldc, *dp;

	if (el->el_line.cursor == el->el_line.buffer)
		return CC_ERROR;

	oldc = el->el_line.cursor;
	/* does a bounds check */
	cp = c__prev_word(el->el_line.cursor, el->el_line.buffer,
	    el->el_state.argument, ce__isword);

	c_insert(el, (int)(oldc - cp));
	for (dp = oldc; cp < oldc && dp < el->el_line.lastchar; cp++)
		*dp++ = *cp;

	el->el_line.cursor = dp;/* put cursor at end */

	return CC_REFRESH;
}


/* em_inc_search_next():
 *	Emacs incremental next search
 */
protected el_action_t
/*ARGSUSED*/
em_inc_search_next(EditLine *el, Int c __attribute__((__unused__)))
{

	el->el_search.patlen = 0;
	return ce_inc_search(el, ED_SEARCH_NEXT_HISTORY);
}


/* em_inc_search_prev():
 *	Emacs incremental reverse search
 */
protected el_action_t
/*ARGSUSED*/
em_inc_search_prev(EditLine *el, Int c __attribute__((__unused__)))
{

	el->el_search.patlen = 0;
	return ce_inc_search(el, ED_SEARCH_PREV_HISTORY);
}


/* em_delete_prev_char():
 *	Delete the character to the left of the cursor
 *	[^?]
 */
protected el_action_t
/*ARGSUSED*/
em_delete_prev_char(EditLine *el, Int c __attribute__((__unused__)))
{

	if (el->el_line.cursor <= el->el_line.buffer)
		return CC_ERROR;

	if (el->el_state.doingarg)
		c_delbefore(el, el->el_state.argument);
	else
		c_delbefore1(el);
	el->el_line.cursor -= el->el_state.argument;
	if (el->el_line.cursor < el->el_line.buffer)
		el->el_line.cursor = el->el_line.buffer;
	return CC_REFRESH;
}