lib/libedit/emacs.c

   1 /*      $NetBSD: emacs.c,v 1.22 2009/02/15 21:55:23 christos 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. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include "config.h"
  36 #if !defined(lint) && !defined(SCCSID)
  37 #if 0
  38 static char sccsid[] = "@(#)emacs.c     8.1 (Berkeley) 6/4/93";
  39 #else
  40 __RCSID("$NetBSD: emacs.c,v 1.22 2009/02/15 21:55:23 christos Exp $");
  41 #endif
  42 #endif /* not lint && not SCCSID */
  43
  44 /*
  45  * emacs.c: Emacs functions
  46  */
  47 #include "el.h"
  48
  49 /* em_delete_or_list():
  50  *      Delete character under cursor or list completions if at end of line
  51  *      [^D]
  52  */
  53 protected el_action_t
  54 /*ARGSUSED*/
  55 em_delete_or_list(EditLine *el, Int c)
  56 {
  57
  58         if (el->el_line.cursor == el->el_line.lastchar) {
  59                                         /* if I'm at the end */
  60                 if (el->el_line.cursor == el->el_line.buffer) {
  61                                         /* and the beginning */
  62                         term_writec(el, c);     /* then do an EOF */
  63                         return (CC_EOF);
  64                 } else {
  65                         /*
  66                          * Here we could list completions, but it is an
  67                          * error right now
  68                          */
  69                         term_beep(el);
  70                         return (CC_ERROR);
  71                 }
  72         } else {
  73                 if (el->el_state.doingarg)
  74                         c_delafter(el, el->el_state.argument);
  75                 else
  76                         c_delafter1(el);
  77                 if (el->el_line.cursor > el->el_line.lastchar)
  78                         el->el_line.cursor = el->el_line.lastchar;
  79                                 /* bounds check */
  80                 return (CC_REFRESH);
  81         }
  82 }
  83
  84
  85 /* em_delete_next_word():
  86  *      Cut from cursor to end of current word
  87  *      [M-d]
  88  */
  89 protected el_action_t
  90 /*ARGSUSED*/
  91 em_delete_next_word(EditLine *el, Int c __attribute__((__unused__)))
  92 {
  93         Char *cp, *p, *kp;
  94
  95         if (el->el_line.cursor == el->el_line.lastchar)
  96                 return (CC_ERROR);
  97
  98         cp = c__next_word(el->el_line.cursor, el->el_line.lastchar,
  99             el->el_state.argument, ce__isword);
 100
 101         for (p = el->el_line.cursor, kp = el->el_chared.c_kill.buf; p < cp; p++)
 102                                 /* save the text */
 103                 *kp++ = *p;
 104         el->el_chared.c_kill.last = kp;
 105
 106         c_delafter(el, (int)(cp - el->el_line.cursor)); /* delete after dot */
 107         if (el->el_line.cursor > el->el_line.lastchar)
 108                 el->el_line.cursor = el->el_line.lastchar;
 109                                 /* bounds check */
 110         return (CC_REFRESH);
 111 }
 112
 113
 114 /* em_yank():
 115  *      Paste cut buffer at cursor position
 116  *      [^Y]
 117  */
 118 protected el_action_t
 119 /*ARGSUSED*/
 120 em_yank(EditLine *el, Int c __attribute__((__unused__)))
 121 {
 122         Char *kp, *cp;
 123
 124         if (el->el_chared.c_kill.last == el->el_chared.c_kill.buf)
 125                 return (CC_NORM);
 126
 127         if (el->el_line.lastchar +
 128             (el->el_chared.c_kill.last - el->el_chared.c_kill.buf) >=
 129             el->el_line.limit)
 130                 return (CC_ERROR);
 131
 132         el->el_chared.c_kill.mark = el->el_line.cursor;
 133         cp = el->el_line.cursor;
 134
 135         /* open the space, */
 136         c_insert(el,
 137             (int)(el->el_chared.c_kill.last - el->el_chared.c_kill.buf));
 138         /* copy the chars */
 139         for (kp = el->el_chared.c_kill.buf; kp < el->el_chared.c_kill.last; kp++)
 140                 *cp++ = *kp;
 141
 142         /* if an arg, cursor at beginning else cursor at end */
 143         if (el->el_state.argument == 1)
 144                 el->el_line.cursor = cp;
 145
 146         return (CC_REFRESH);
 147 }
 148
 149
 150 /* em_kill_line():
 151  *      Cut the entire line and save in cut buffer
 152  *      [^U]
 153  */
 154 protected el_action_t
 155 /*ARGSUSED*/
 156 em_kill_line(EditLine *el, Int c __attribute__((__unused__)))
 157 {
 158         Char *kp, *cp;
 159
 160         cp = el->el_line.buffer;
 161         kp = el->el_chared.c_kill.buf;
 162         while (cp < el->el_line.lastchar)
 163                 *kp++ = *cp++;  /* copy it */
 164         el->el_chared.c_kill.last = kp;
 165                                 /* zap! -- delete all of it */
 166         el->el_line.lastchar = el->el_line.buffer;
 167         el->el_line.cursor = el->el_line.buffer;
 168         return (CC_REFRESH);
 169 }
 170
 171
 172 /* em_kill_region():
 173  *      Cut area between mark and cursor and save in cut buffer
 174  *      [^W]
 175  */
 176 protected el_action_t
 177 /*ARGSUSED*/
 178 em_kill_region(EditLine *el, Int c __attribute__((__unused__)))
 179 {
 180         Char *kp, *cp;
 181
 182         if (!el->el_chared.c_kill.mark)
 183                 return (CC_ERROR);
 184
 185         if (el->el_chared.c_kill.mark > el->el_line.cursor) {
 186                 cp = el->el_line.cursor;
 187                 kp = el->el_chared.c_kill.buf;
 188                 while (cp < el->el_chared.c_kill.mark)
 189                         *kp++ = *cp++;  /* copy it */
 190                 el->el_chared.c_kill.last = kp;
 191                 c_delafter(el, (int)(cp - el->el_line.cursor));
 192         } else {                /* mark is before cursor */
 193                 cp = el->el_chared.c_kill.mark;
 194                 kp = el->el_chared.c_kill.buf;
 195                 while (cp < el->el_line.cursor)
 196                         *kp++ = *cp++;  /* copy it */
 197                 el->el_chared.c_kill.last = kp;
 198                 c_delbefore(el, (int)(cp - el->el_chared.c_kill.mark));
 199                 el->el_line.cursor = el->el_chared.c_kill.mark;
 200         }
 201         return (CC_REFRESH);
 202 }
 203
 204
 205 /* em_copy_region():
 206  *      Copy area between mark and cursor to cut buffer
 207  *      [M-W]
 208  */
 209 protected el_action_t
 210 /*ARGSUSED*/
 211 em_copy_region(EditLine *el, Int c __attribute__((__unused__)))
 212 {
 213         Char *kp, *cp;
 214
 215         if (!el->el_chared.c_kill.mark)
 216                 return (CC_ERROR);
 217
 218         if (el->el_chared.c_kill.mark > el->el_line.cursor) {
 219                 cp = el->el_line.cursor;
 220                 kp = el->el_chared.c_kill.buf;
 221                 while (cp < el->el_chared.c_kill.mark)
 222                         *kp++ = *cp++;  /* copy it */
 223                 el->el_chared.c_kill.last = kp;
 224         } else {
 225                 cp = el->el_chared.c_kill.mark;
 226                 kp = el->el_chared.c_kill.buf;
 227                 while (cp < el->el_line.cursor)
 228                         *kp++ = *cp++;  /* copy it */
 229                 el->el_chared.c_kill.last = kp;
 230         }
 231         return (CC_NORM);
 232 }
 233
 234
 235 /* em_gosmacs_transpose():
 236  *      Exchange the two characters before the cursor
 237  *      Gosling emacs transpose chars [^T]
 238  */
 239 protected el_action_t
 240 em_gosmacs_transpose(EditLine *el, Int c)
 241 {
 242
 243         if (el->el_line.cursor > &el->el_line.buffer[1]) {
 244                 /* must have at least two chars entered */
 245                 c = el->el_line.cursor[-2];
 246                 el->el_line.cursor[-2] = el->el_line.cursor[-1];
 247                 el->el_line.cursor[-1] = c;
 248                 return (CC_REFRESH);
 249         } else
 250                 return (CC_ERROR);
 251 }
 252
 253
 254 /* em_next_word():
 255  *      Move next to end of current word
 256  *      [M-f]
 257  */
 258 protected el_action_t
 259 /*ARGSUSED*/
 260 em_next_word(EditLine *el, Int c __attribute__((__unused__)))
 261 {
 262         if (el->el_line.cursor == el->el_line.lastchar)
 263                 return (CC_ERROR);
 264
 265         el->el_line.cursor = c__next_word(el->el_line.cursor,
 266             el->el_line.lastchar,
 267             el->el_state.argument,
 268             ce__isword);
 269
 270         if (el->el_map.type == MAP_VI)
 271                 if (el->el_chared.c_vcmd.action != NOP) {
 272                         cv_delfini(el);
 273                         return (CC_REFRESH);
 274                 }
 275         return (CC_CURSOR);
 276 }
 277
 278
 279 /* em_upper_case():
 280  *      Uppercase the characters from cursor to end of current word
 281  *      [M-u]
 282  */
 283 protected el_action_t
 284 /*ARGSUSED*/
 285 em_upper_case(EditLine *el, Int c __attribute__((__unused__)))
 286 {
 287         Char *cp, *ep;
 288
 289         ep = c__next_word(el->el_line.cursor, el->el_line.lastchar,
 290             el->el_state.argument, ce__isword);
 291
 292         for (cp = el->el_line.cursor; cp < ep; cp++)
 293                 if (Islower(*cp))
 294                         *cp = Toupper(*cp);
 295
 296         el->el_line.cursor = ep;
 297         if (el->el_line.cursor > el->el_line.lastchar)
 298                 el->el_line.cursor = el->el_line.lastchar;
 299         return (CC_REFRESH);
 300 }
 301
 302
 303 /* em_capitol_case():
 304  *      Capitalize the characters from cursor to end of current word
 305  *      [M-c]
 306  */
 307 protected el_action_t
 308 /*ARGSUSED*/
 309 em_capitol_case(EditLine *el, Int c __attribute__((__unused__)))
 310 {
 311         Char *cp, *ep;
 312
 313         ep = c__next_word(el->el_line.cursor, el->el_line.lastchar,
 314             el->el_state.argument, ce__isword);
 315
 316         for (cp = el->el_line.cursor; cp < ep; cp++) {
 317                 if (Isalpha(*cp)) {
 318                         if (Islower(*cp))
 319                                 *cp = Toupper(*cp);
 320                         cp++;
 321                         break;
 322                 }
 323         }
 324         for (; cp < ep; cp++)
 325                 if (Isupper(*cp))
 326                         *cp = Tolower(*cp);
 327
 328         el->el_line.cursor = ep;
 329         if (el->el_line.cursor > el->el_line.lastchar)
 330                 el->el_line.cursor = el->el_line.lastchar;
 331         return (CC_REFRESH);
 332 }
 333
 334
 335 /* em_lower_case():
 336  *      Lowercase the characters from cursor to end of current word
 337  *      [M-l]
 338  */
 339 protected el_action_t
 340 /*ARGSUSED*/
 341 em_lower_case(EditLine *el, Int c __attribute__((__unused__)))
 342 {
 343         Char *cp, *ep;
 344
 345         ep = c__next_word(el->el_line.cursor, el->el_line.lastchar,
 346             el->el_state.argument, ce__isword);
 347
 348         for (cp = el->el_line.cursor; cp < ep; cp++)
 349                 if (Isupper(*cp))
 350                         *cp = Tolower(*cp);
 351
 352         el->el_line.cursor = ep;
 353         if (el->el_line.cursor > el->el_line.lastchar)
 354                 el->el_line.cursor = el->el_line.lastchar;
 355         return (CC_REFRESH);
 356 }
 357
 358
 359 /* em_set_mark():
 360  *      Set the mark at cursor
 361  *      [^@]
 362  */
 363 protected el_action_t
 364 /*ARGSUSED*/
 365 em_set_mark(EditLine *el, Int c __attribute__((__unused__)))
 366 {
 367
 368         el->el_chared.c_kill.mark = el->el_line.cursor;
 369         return (CC_NORM);
 370 }
 371
 372
 373 /* em_exchange_mark():
 374  *      Exchange the cursor and mark
 375  *      [^X^X]
 376  */
 377 protected el_action_t
 378 /*ARGSUSED*/
 379 em_exchange_mark(EditLine *el, Int c __attribute__((__unused__)))
 380 {
 381         Char *cp;
 382
 383         cp = el->el_line.cursor;
 384         el->el_line.cursor = el->el_chared.c_kill.mark;
 385         el->el_chared.c_kill.mark = cp;
 386         return (CC_CURSOR);
 387 }
 388
 389
 390 /* em_universal_argument():
 391  *      Universal argument (argument times 4)
 392  *      [^U]
 393  */
 394 protected el_action_t
 395 /*ARGSUSED*/
 396 em_universal_argument(EditLine *el, Int c __attribute__((__unused__)))
 397 {                               /* multiply current argument by 4 */
 398
 399         if (el->el_state.argument > 1000000)
 400                 return (CC_ERROR);
 401         el->el_state.doingarg = 1;
 402         el->el_state.argument *= 4;
 403         return (CC_ARGHACK);
 404 }
 405
 406
 407 /* em_meta_next():
 408  *      Add 8th bit to next character typed
 409  *      [<ESC>]
 410  */
 411 protected el_action_t
 412 /*ARGSUSED*/
 413 em_meta_next(EditLine *el, Int c __attribute__((__unused__)))
 414 {
 415
 416         el->el_state.metanext = 1;
 417         return (CC_ARGHACK);
 418 }
 419
 420
 421 /* em_toggle_overwrite():
 422  *      Switch from insert to overwrite mode or vice versa
 423  */
 424 protected el_action_t
 425 /*ARGSUSED*/
 426 em_toggle_overwrite(EditLine *el, Int c __attribute__((__unused__)))
 427 {
 428
 429         el->el_state.inputmode = (el->el_state.inputmode == MODE_INSERT) ?
 430             MODE_REPLACE : MODE_INSERT;
 431         return (CC_NORM);
 432 }
 433
 434
 435 /* em_copy_prev_word():
 436  *      Copy current word to cursor
 437  */
 438 protected el_action_t
 439 /*ARGSUSED*/
 440 em_copy_prev_word(EditLine *el, Int c __attribute__((__unused__)))
 441 {
 442         Char *cp, *oldc, *dp;
 443
 444         if (el->el_line.cursor == el->el_line.buffer)
 445                 return (CC_ERROR);
 446
 447         oldc = el->el_line.cursor;
 448         /* does a bounds check */
 449         cp = c__prev_word(el->el_line.cursor, el->el_line.buffer,
 450             el->el_state.argument, ce__isword);
 451
 452         c_insert(el, (int)(oldc - cp));
 453         for (dp = oldc; cp < oldc && dp < el->el_line.lastchar; cp++)
 454                 *dp++ = *cp;
 455
 456         el->el_line.cursor = dp;/* put cursor at end */
 457
 458         return (CC_REFRESH);
 459 }
 460
 461
 462 /* em_inc_search_next():
 463  *      Emacs incremental next search
 464  */
 465 protected el_action_t
 466 /*ARGSUSED*/
 467 em_inc_search_next(EditLine *el, Int c __attribute__((__unused__)))
 468 {
 469
 470         el->el_search.patlen = 0;
 471         return (ce_inc_search(el, ED_SEARCH_NEXT_HISTORY));
 472 }
 473
 474
 475 /* em_inc_search_prev():
 476  *      Emacs incremental reverse search
 477  */
 478 protected el_action_t
 479 /*ARGSUSED*/
 480 em_inc_search_prev(EditLine *el, Int c __attribute__((__unused__)))
 481 {
 482
 483         el->el_search.patlen = 0;
 484         return (ce_inc_search(el, ED_SEARCH_PREV_HISTORY));
 485 }
 486
 487
 488 /* em_delete_prev_char():
 489  *      Delete the character to the left of the cursor
 490  *      [^?]
 491  */
 492 protected el_action_t
 493 /*ARGSUSED*/
 494 em_delete_prev_char(EditLine *el, Int c __attribute__((__unused__)))
 495 {
 496
 497         if (el->el_line.cursor <= el->el_line.buffer)
 498                 return (CC_ERROR);
 499
 500         if (el->el_state.doingarg)
 501                 c_delbefore(el, el->el_state.argument);
 502         else
 503                 c_delbefore1(el);
 504         el->el_line.cursor -= el->el_state.argument;
 505         if (el->el_line.cursor < el->el_line.buffer)
 506                 el->el_line.cursor = el->el_line.buffer;
 507         return (CC_REFRESH);
 508 }