lib/libedit/emacs.c

   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  * @(#)emacs.c  8.1 (Berkeley) 6/4/93
  33  * $NetBSD: emacs.c,v 1.21 2006/03/06 21:11:56 christos Exp $
  34  * $DragonFly: src/lib/libedit/emacs.c,v 1.6 2007/05/05 00:27:39 pavalos Exp $
  35  */
  36
  37 #include "config.h"
  38
  39 /*
  40  * emacs.c: Emacs functions
  41  */
  42 #include "el.h"
  43
  44 /* em_delete_or_list():
  45  *      Delete character under cursor or list completions if at end of line
  46  *      [^D]
  47  */
  48 protected el_action_t
  49 /*ARGSUSED*/
  50 em_delete_or_list(EditLine *el, int c)
  51 {
  52
  53         if (el->el_line.cursor == el->el_line.lastchar) {
  54                                         /* if I'm at the end */
  55                 if (el->el_line.cursor == el->el_line.buffer) {
  56                                         /* and the beginning */
  57                         term_writec(el, c);     /* then do an EOF */
  58                         return (CC_EOF);
  59                 } else {
  60                         /*
  61                          * Here we could list completions, but it is an
  62                          * error right now
  63                          */
  64                         term_beep(el);
  65                         return (CC_ERROR);
  66                 }
  67         } else {
  68                 if (el->el_state.doingarg)
  69                         c_delafter(el, el->el_state.argument);
  70                 else
  71                         c_delafter1(el);
  72                 if (el->el_line.cursor > el->el_line.lastchar)
  73                         el->el_line.cursor = el->el_line.lastchar;
  74                                 /* bounds check */
  75                 return (CC_REFRESH);
  76         }
  77 }
  78
  79
  80 /* em_delete_next_word():
  81  *      Cut from cursor to end of current word
  82  *      [M-d]
  83  */
  84 protected el_action_t
  85 /*ARGSUSED*/
  86 em_delete_next_word(EditLine *el, int c __attribute__((__unused__)))
  87 {
  88         char *cp, *p, *kp;
  89
  90         if (el->el_line.cursor == el->el_line.lastchar)
  91                 return (CC_ERROR);
  92
  93         cp = c__next_word(el->el_line.cursor, el->el_line.lastchar,
  94             el->el_state.argument, ce__isword);
  95
  96         for (p = el->el_line.cursor, kp = el->el_chared.c_kill.buf; p < cp; p++)
  97                                 /* save the text */
  98                 *kp++ = *p;
  99         el->el_chared.c_kill.last = kp;
 100
 101         c_delafter(el, cp - el->el_line.cursor);        /* delete after dot */
 102         if (el->el_line.cursor > el->el_line.lastchar)
 103                 el->el_line.cursor = el->el_line.lastchar;
 104                                 /* bounds check */
 105         return (CC_REFRESH);
 106 }
 107
 108
 109 /* em_yank():
 110  *      Paste cut buffer at cursor position
 111  *      [^Y]
 112  */
 113 protected el_action_t
 114 /*ARGSUSED*/
 115 em_yank(EditLine *el, int c __attribute__((__unused__)))
 116 {
 117         char *kp, *cp;
 118
 119         if (el->el_chared.c_kill.last == el->el_chared.c_kill.buf)
 120                 return (CC_NORM);
 121
 122         if (el->el_line.lastchar +
 123             (el->el_chared.c_kill.last - el->el_chared.c_kill.buf) >=
 124             el->el_line.limit)
 125                 return (CC_ERROR);
 126
 127         el->el_chared.c_kill.mark = el->el_line.cursor;
 128         cp = el->el_line.cursor;
 129
 130         /* open the space, */
 131         c_insert(el, el->el_chared.c_kill.last - el->el_chared.c_kill.buf);
 132         /* copy the chars */
 133         for (kp = el->el_chared.c_kill.buf; kp < el->el_chared.c_kill.last; kp++)
 134                 *cp++ = *kp;
 135
 136         /* if an arg, cursor at beginning else cursor at end */
 137         if (el->el_state.argument == 1)
 138                 el->el_line.cursor = cp;
 139
 140         return (CC_REFRESH);
 141 }
 142
 143
 144 /* em_kill_line():
 145  *      Cut the entire line and save in cut buffer
 146  *      [^U]
 147  */
 148 protected el_action_t
 149 /*ARGSUSED*/
 150 em_kill_line(EditLine *el, int c __attribute__((__unused__)))
 151 {
 152         char *kp, *cp;
 153
 154         cp = el->el_line.buffer;
 155         kp = el->el_chared.c_kill.buf;
 156         while (cp < el->el_line.lastchar)
 157                 *kp++ = *cp++;  /* copy it */
 158         el->el_chared.c_kill.last = kp;
 159                                 /* zap! -- delete all of it */
 160         el->el_line.lastchar = el->el_line.buffer;
 161         el->el_line.cursor = el->el_line.buffer;
 162         return (CC_REFRESH);
 163 }
 164
 165
 166 /* em_kill_region():
 167  *      Cut area between mark and cursor and save in cut buffer
 168  *      [^W]
 169  */
 170 protected el_action_t
 171 /*ARGSUSED*/
 172 em_kill_region(EditLine *el, int c __attribute__((__unused__)))
 173 {
 174         char *kp, *cp;
 175
 176         if (!el->el_chared.c_kill.mark)
 177                 return (CC_ERROR);
 178
 179         if (el->el_chared.c_kill.mark > el->el_line.cursor) {
 180                 cp = el->el_line.cursor;
 181                 kp = el->el_chared.c_kill.buf;
 182                 while (cp < el->el_chared.c_kill.mark)
 183                         *kp++ = *cp++;  /* copy it */
 184                 el->el_chared.c_kill.last = kp;
 185                 c_delafter(el, cp - el->el_line.cursor);
 186         } else {                /* mark is before cursor */
 187                 cp = el->el_chared.c_kill.mark;
 188                 kp = el->el_chared.c_kill.buf;
 189                 while (cp < el->el_line.cursor)
 190                         *kp++ = *cp++;  /* copy it */
 191                 el->el_chared.c_kill.last = kp;
 192                 c_delbefore(el, cp - el->el_chared.c_kill.mark);
 193                 el->el_line.cursor = el->el_chared.c_kill.mark;
 194         }
 195         return (CC_REFRESH);
 196 }
 197
 198
 199 /* em_copy_region():
 200  *      Copy area between mark and cursor to cut buffer
 201  *      [M-W]
 202  */
 203 protected el_action_t
 204 /*ARGSUSED*/
 205 em_copy_region(EditLine *el, int c __attribute__((__unused__)))
 206 {
 207         char *kp, *cp;
 208
 209         if (!el->el_chared.c_kill.mark)
 210                 return (CC_ERROR);
 211
 212         if (el->el_chared.c_kill.mark > el->el_line.cursor) {
 213                 cp = el->el_line.cursor;
 214                 kp = el->el_chared.c_kill.buf;
 215                 while (cp < el->el_chared.c_kill.mark)
 216                         *kp++ = *cp++;  /* copy it */
 217                 el->el_chared.c_kill.last = kp;
 218         } else {
 219                 cp = el->el_chared.c_kill.mark;
 220                 kp = el->el_chared.c_kill.buf;
 221                 while (cp < el->el_line.cursor)
 222                         *kp++ = *cp++;  /* copy it */
 223                 el->el_chared.c_kill.last = kp;
 224         }
 225         return (CC_NORM);
 226 }
 227
 228
 229 /* em_gosmacs_transpose():
 230  *      Exchange the two characters before the cursor
 231  *      Gosling emacs transpose chars [^T]
 232  */
 233 protected el_action_t
 234 em_gosmacs_transpose(EditLine *el, int c)
 235 {
 236
 237         if (el->el_line.cursor > &el->el_line.buffer[1]) {
 238                 /* must have at least two chars entered */
 239                 c = el->el_line.cursor[-2];
 240                 el->el_line.cursor[-2] = el->el_line.cursor[-1];
 241                 el->el_line.cursor[-1] = c;
 242                 return (CC_REFRESH);
 243         } else
 244                 return (CC_ERROR);
 245 }
 246
 247
 248 /* em_next_word():
 249  *      Move next to end of current word
 250  *      [M-f]
 251  */
 252 protected el_action_t
 253 /*ARGSUSED*/
 254 em_next_word(EditLine *el, int c __attribute__((__unused__)))
 255 {
 256         if (el->el_line.cursor == el->el_line.lastchar)
 257                 return (CC_ERROR);
 258
 259         el->el_line.cursor = c__next_word(el->el_line.cursor,
 260             el->el_line.lastchar,
 261             el->el_state.argument,
 262             ce__isword);
 263
 264         if (el->el_map.type == MAP_VI)
 265                 if (el->el_chared.c_vcmd.action != NOP) {
 266                         cv_delfini(el);
 267                         return (CC_REFRESH);
 268                 }
 269         return (CC_CURSOR);
 270 }
 271
 272
 273 /* em_upper_case():
 274  *      Uppercase the characters from cursor to end of current word
 275  *      [M-u]
 276  */
 277 protected el_action_t
 278 /*ARGSUSED*/
 279 em_upper_case(EditLine *el, int c __attribute__((__unused__)))
 280 {
 281         char *cp, *ep;
 282
 283         ep = c__next_word(el->el_line.cursor, el->el_line.lastchar,
 284             el->el_state.argument, ce__isword);
 285
 286         for (cp = el->el_line.cursor; cp < ep; cp++)
 287                 if (islower((unsigned char)*cp))
 288                         *cp = toupper((unsigned char)*cp);
 289
 290         el->el_line.cursor = ep;
 291         if (el->el_line.cursor > el->el_line.lastchar)
 292                 el->el_line.cursor = el->el_line.lastchar;
 293         return (CC_REFRESH);
 294 }
 295
 296
 297 /* em_capitol_case():
 298  *      Capitalize the characters from cursor to end of current word
 299  *      [M-c]
 300  */
 301 protected el_action_t
 302 /*ARGSUSED*/
 303 em_capitol_case(EditLine *el, int c __attribute__((__unused__)))
 304 {
 305         char *cp, *ep;
 306
 307         ep = c__next_word(el->el_line.cursor, el->el_line.lastchar,
 308             el->el_state.argument, ce__isword);
 309
 310         for (cp = el->el_line.cursor; cp < ep; cp++) {
 311                 if (isalpha((unsigned char)*cp)) {
 312                         if (islower((unsigned char)*cp))
 313                                 *cp = toupper((unsigned char)*cp);
 314                         cp++;
 315                         break;
 316                 }
 317         }
 318         for (; cp < ep; cp++)
 319                 if (isupper((unsigned char)*cp))
 320                         *cp = tolower((unsigned char)*cp);
 321
 322         el->el_line.cursor = ep;
 323         if (el->el_line.cursor > el->el_line.lastchar)
 324                 el->el_line.cursor = el->el_line.lastchar;
 325         return (CC_REFRESH);
 326 }
 327
 328
 329 /* em_lower_case():
 330  *      Lowercase the characters from cursor to end of current word
 331  *      [M-l]
 332  */
 333 protected el_action_t
 334 /*ARGSUSED*/
 335 em_lower_case(EditLine *el, int c __attribute__((__unused__)))
 336 {
 337         char *cp, *ep;
 338
 339         ep = c__next_word(el->el_line.cursor, el->el_line.lastchar,
 340             el->el_state.argument, ce__isword);
 341
 342         for (cp = el->el_line.cursor; cp < ep; cp++)
 343                 if (isupper((unsigned char)*cp))
 344                         *cp = tolower((unsigned char)*cp);
 345
 346         el->el_line.cursor = ep;
 347         if (el->el_line.cursor > el->el_line.lastchar)
 348                 el->el_line.cursor = el->el_line.lastchar;
 349         return (CC_REFRESH);
 350 }
 351
 352
 353 /* em_set_mark():
 354  *      Set the mark at cursor
 355  *      [^@]
 356  */
 357 protected el_action_t
 358 /*ARGSUSED*/
 359 em_set_mark(EditLine *el, int c __attribute__((__unused__)))
 360 {
 361
 362         el->el_chared.c_kill.mark = el->el_line.cursor;
 363         return (CC_NORM);
 364 }
 365
 366
 367 /* em_exchange_mark():
 368  *      Exchange the cursor and mark
 369  *      [^X^X]
 370  */
 371 protected el_action_t
 372 /*ARGSUSED*/
 373 em_exchange_mark(EditLine *el, int c __attribute__((__unused__)))
 374 {
 375         char *cp;
 376
 377         cp = el->el_line.cursor;
 378         el->el_line.cursor = el->el_chared.c_kill.mark;
 379         el->el_chared.c_kill.mark = cp;
 380         return (CC_CURSOR);
 381 }
 382
 383
 384 /* em_universal_argument():
 385  *      Universal argument (argument times 4)
 386  *      [^U]
 387  */
 388 protected el_action_t
 389 /*ARGSUSED*/
 390 em_universal_argument(EditLine *el, int c __attribute__((__unused__)))
 391 {                               /* multiply current argument by 4 */
 392
 393         if (el->el_state.argument > 1000000)
 394                 return (CC_ERROR);
 395         el->el_state.doingarg = 1;
 396         el->el_state.argument *= 4;
 397         return (CC_ARGHACK);
 398 }
 399
 400
 401 /* em_meta_next():
 402  *      Add 8th bit to next character typed
 403  *      [<ESC>]
 404  */
 405 protected el_action_t
 406 /*ARGSUSED*/
 407 em_meta_next(EditLine *el, int c __attribute__((__unused__)))
 408 {
 409
 410         el->el_state.metanext = 1;
 411         return (CC_ARGHACK);
 412 }
 413
 414
 415 /* em_toggle_overwrite():
 416  *      Switch from insert to overwrite mode or vice versa
 417  */
 418 protected el_action_t
 419 /*ARGSUSED*/
 420 em_toggle_overwrite(EditLine *el, int c __attribute__((__unused__)))
 421 {
 422
 423         el->el_state.inputmode = (el->el_state.inputmode == MODE_INSERT) ?
 424             MODE_REPLACE : MODE_INSERT;
 425         return (CC_NORM);
 426 }
 427
 428
 429 /* em_copy_prev_word():
 430  *      Copy current word to cursor
 431  */
 432 protected el_action_t
 433 /*ARGSUSED*/
 434 em_copy_prev_word(EditLine *el, int c __attribute__((__unused__)))
 435 {
 436         char *cp, *oldc, *dp;
 437
 438         if (el->el_line.cursor == el->el_line.buffer)
 439                 return (CC_ERROR);
 440
 441         oldc = el->el_line.cursor;
 442         /* does a bounds check */
 443         cp = c__prev_word(el->el_line.cursor, el->el_line.buffer,
 444             el->el_state.argument, ce__isword);
 445
 446         c_insert(el, oldc - cp);
 447         for (dp = oldc; cp < oldc && dp < el->el_line.lastchar; cp++)
 448                 *dp++ = *cp;
 449
 450         el->el_line.cursor = dp;/* put cursor at end */
 451
 452         return (CC_REFRESH);
 453 }
 454
 455
 456 /* em_inc_search_next():
 457  *      Emacs incremental next search
 458  */
 459 protected el_action_t
 460 /*ARGSUSED*/
 461 em_inc_search_next(EditLine *el, int c __attribute__((__unused__)))
 462 {
 463
 464         el->el_search.patlen = 0;
 465         return (ce_inc_search(el, ED_SEARCH_NEXT_HISTORY));
 466 }
 467
 468
 469 /* em_inc_search_prev():
 470  *      Emacs incremental reverse search
 471  */
 472 protected el_action_t
 473 /*ARGSUSED*/
 474 em_inc_search_prev(EditLine *el, int c __attribute__((__unused__)))
 475 {
 476
 477         el->el_search.patlen = 0;
 478         return (ce_inc_search(el, ED_SEARCH_PREV_HISTORY));
 479 }
 480
 481
 482 /* em_delete_prev_char():
 483  *      Delete the character to the left of the cursor
 484  *      [^?]
 485  */
 486 protected el_action_t
 487 /*ARGSUSED*/
 488 em_delete_prev_char(EditLine *el, int c __attribute__((__unused__)))
 489 {
 490
 491         if (el->el_line.cursor <= el->el_line.buffer)
 492                 return (CC_ERROR);
 493
 494         if (el->el_state.doingarg)
 495                 c_delbefore(el, el->el_state.argument);
 496         else
 497                 c_delbefore1(el);
 498         el->el_line.cursor -= el->el_state.argument;
 499         if (el->el_line.cursor < el->el_line.buffer)
 500                 el->el_line.cursor = el->el_line.buffer;
 501         return (CC_REFRESH);
 502 }