lib/libedit/emacs.c

   1 /*      $NetBSD: emacs.c,v 1.25 2011/07/29 15:16:33 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 1.25 2011/07/29 15:16:33 christos Exp $");
  41 #endif
  42 #endif /* not lint && not SCCSID */
  43 #include <sys/cdefs.h>
  44 __FBSDID("$FreeBSD$");
  45
  46 /*
  47  * emacs.c: Emacs functions
  48  */
  49 #include "el.h"
  50
  51 /* em_delete_or_list():
  52  *      Delete character under cursor or list completions if at end of line
  53  *      [^D]
  54  */
  55 protected el_action_t
  56 /*ARGSUSED*/
  57 em_delete_or_list(EditLine *el, Int c)
  58 {
  59
  60         if (el->el_line.cursor == el->el_line.lastchar) {
  61                                         /* if I'm at the end */
  62                 if (el->el_line.cursor == el->el_line.buffer) {
  63                                         /* and the beginning */
  64                         terminal_writec(el, c); /* then do an EOF */
  65                         return CC_EOF;
  66                 } else {
  67                         /*
  68                          * Here we could list completions, but it is an
  69                          * error right now
  70                          */
  71                         terminal_beep(el);
  72                         return CC_ERROR;
  73                 }
  74         } else {
  75                 if (el->el_state.doingarg)
  76                         c_delafter(el, el->el_state.argument);
  77                 else
  78                         c_delafter1(el);
  79                 if (el->el_line.cursor > el->el_line.lastchar)
  80                         el->el_line.cursor = el->el_line.lastchar;
  81                                 /* bounds check */
  82                 return CC_REFRESH;
  83         }
  84 }
  85
  86
  87 /* em_delete_next_word():
  88  *      Cut from cursor to end of current word
  89  *      [M-d]
  90  */
  91 protected el_action_t
  92 /*ARGSUSED*/
  93 em_delete_next_word(EditLine *el, Int c __attribute__((__unused__)))
  94 {
  95         Char *cp, *p, *kp;
  96
  97         if (el->el_line.cursor == el->el_line.lastchar)
  98                 return CC_ERROR;
  99
 100         cp = c__next_word(el->el_line.cursor, el->el_line.lastchar,
 101             el->el_state.argument, ce__isword);
 102
 103         for (p = el->el_line.cursor, kp = el->el_chared.c_kill.buf; p < cp; p++)
 104                                 /* save the text */
 105                 *kp++ = *p;
 106         el->el_chared.c_kill.last = kp;
 107
 108         c_delafter(el, (int)(cp - el->el_line.cursor)); /* delete after dot */
 109         if (el->el_line.cursor > el->el_line.lastchar)
 110                 el->el_line.cursor = el->el_line.lastchar;
 111                                 /* bounds check */
 112         return CC_REFRESH;
 113 }
 114
 115
 116 /* em_yank():
 117  *      Paste cut buffer at cursor position
 118  *      [^Y]
 119  */
 120 protected el_action_t
 121 /*ARGSUSED*/
 122 em_yank(EditLine *el, Int c __attribute__((__unused__)))
 123 {
 124         Char *kp, *cp;
 125
 126         if (el->el_chared.c_kill.last == el->el_chared.c_kill.buf)
 127                 return CC_NORM;
 128
 129         if (el->el_line.lastchar +
 130             (el->el_chared.c_kill.last - el->el_chared.c_kill.buf) >=
 131             el->el_line.limit)
 132                 return CC_ERROR;
 133
 134         el->el_chared.c_kill.mark = el->el_line.cursor;
 135         cp = el->el_line.cursor;
 136
 137         /* open the space, */
 138         c_insert(el,
 139             (int)(el->el_chared.c_kill.last - el->el_chared.c_kill.buf));
 140         /* copy the chars */
 141         for (kp = el->el_chared.c_kill.buf; kp < el->el_chared.c_kill.last; kp++)
 142                 *cp++ = *kp;
 143
 144         /* if an arg, cursor at beginning else cursor at end */
 145         if (el->el_state.argument == 1)
 146                 el->el_line.cursor = cp;
 147
 148         return CC_REFRESH;
 149 }
 150
 151
 152 /* em_kill_line():
 153  *      Cut the entire line and save in cut buffer
 154  *      [^U]
 155  */
 156 protected el_action_t
 157 /*ARGSUSED*/
 158 em_kill_line(EditLine *el, Int c __attribute__((__unused__)))
 159 {
 160         Char *kp, *cp;
 161
 162         cp = el->el_line.buffer;
 163         kp = el->el_chared.c_kill.buf;
 164         while (cp < el->el_line.lastchar)
 165                 *kp++ = *cp++;  /* copy it */
 166         el->el_chared.c_kill.last = kp;
 167                                 /* zap! -- delete all of it */
 168         el->el_line.lastchar = el->el_line.buffer;
 169         el->el_line.cursor = el->el_line.buffer;
 170         return CC_REFRESH;
 171 }
 172
 173
 174 /* em_kill_region():
 175  *      Cut area between mark and cursor and save in cut buffer
 176  *      [^W]
 177  */
 178 protected el_action_t
 179 /*ARGSUSED*/
 180 em_kill_region(EditLine *el, Int c __attribute__((__unused__)))
 181 {
 182         Char *kp, *cp;
 183
 184         if (!el->el_chared.c_kill.mark)
 185                 return CC_ERROR;
 186
 187         if (el->el_chared.c_kill.mark > el->el_line.cursor) {
 188                 cp = el->el_line.cursor;
 189                 kp = el->el_chared.c_kill.buf;
 190                 while (cp < el->el_chared.c_kill.mark)
 191                         *kp++ = *cp++;  /* copy it */
 192                 el->el_chared.c_kill.last = kp;
 193                 c_delafter(el, (int)(cp - el->el_line.cursor));
 194         } else {                /* mark is before cursor */
 195                 cp = el->el_chared.c_kill.mark;
 196                 kp = el->el_chared.c_kill.buf;
 197                 while (cp < el->el_line.cursor)
 198                         *kp++ = *cp++;  /* copy it */
 199                 el->el_chared.c_kill.last = kp;
 200                 c_delbefore(el, (int)(cp - el->el_chared.c_kill.mark));
 201                 el->el_line.cursor = el->el_chared.c_kill.mark;
 202         }
 203         return CC_REFRESH;
 204 }
 205
 206
 207 /* em_copy_region():
 208  *      Copy area between mark and cursor to cut buffer
 209  *      [M-W]
 210  */
 211 protected el_action_t
 212 /*ARGSUSED*/
 213 em_copy_region(EditLine *el, Int c __attribute__((__unused__)))
 214 {
 215         Char *kp, *cp;
 216
 217         if (!el->el_chared.c_kill.mark)
 218                 return CC_ERROR;
 219
 220         if (el->el_chared.c_kill.mark > el->el_line.cursor) {
 221                 cp = el->el_line.cursor;
 222                 kp = el->el_chared.c_kill.buf;
 223                 while (cp < el->el_chared.c_kill.mark)
 224                         *kp++ = *cp++;  /* copy it */
 225                 el->el_chared.c_kill.last = kp;
 226         } else {
 227                 cp = el->el_chared.c_kill.mark;
 228                 kp = el->el_chared.c_kill.buf;
 229                 while (cp < el->el_line.cursor)
 230                         *kp++ = *cp++;  /* copy it */
 231                 el->el_chared.c_kill.last = kp;
 232         }
 233         return CC_NORM;
 234 }
 235
 236
 237 /* em_gosmacs_transpose():
 238  *      Exchange the two characters before the cursor
 239  *      Gosling emacs transpose chars [^T]
 240  */
 241 protected el_action_t
 242 em_gosmacs_transpose(EditLine *el, Int c)
 243 {
 244
 245         if (el->el_line.cursor > &el->el_line.buffer[1]) {
 246                 /* must have at least two chars entered */
 247                 c = el->el_line.cursor[-2];
 248                 el->el_line.cursor[-2] = el->el_line.cursor[-1];
 249                 el->el_line.cursor[-1] = c;
 250                 return CC_REFRESH;
 251         } else
 252                 return CC_ERROR;
 253 }
 254
 255
 256 /* em_next_word():
 257  *      Move next to end of current word
 258  *      [M-f]
 259  */
 260 protected el_action_t
 261 /*ARGSUSED*/
 262 em_next_word(EditLine *el, Int c __attribute__((__unused__)))
 263 {
 264         if (el->el_line.cursor == el->el_line.lastchar)
 265                 return CC_ERROR;
 266
 267         el->el_line.cursor = c__next_word(el->el_line.cursor,
 268             el->el_line.lastchar,
 269             el->el_state.argument,
 270             ce__isword);
 271
 272         if (el->el_map.type == MAP_VI)
 273                 if (el->el_chared.c_vcmd.action != NOP) {
 274                         cv_delfini(el);
 275                         return CC_REFRESH;
 276                 }
 277         return CC_CURSOR;
 278 }
 279
 280
 281 /* em_upper_case():
 282  *      Uppercase the characters from cursor to end of current word
 283  *      [M-u]
 284  */
 285 protected el_action_t
 286 /*ARGSUSED*/
 287 em_upper_case(EditLine *el, Int c __attribute__((__unused__)))
 288 {
 289         Char *cp, *ep;
 290
 291         ep = c__next_word(el->el_line.cursor, el->el_line.lastchar,
 292             el->el_state.argument, ce__isword);
 293
 294         for (cp = el->el_line.cursor; cp < ep; cp++)
 295                 if (Islower(*cp))
 296                         *cp = Toupper(*cp);
 297
 298         el->el_line.cursor = ep;
 299         if (el->el_line.cursor > el->el_line.lastchar)
 300                 el->el_line.cursor = el->el_line.lastchar;
 301         return CC_REFRESH;
 302 }
 303
 304
 305 /* em_capitol_case():
 306  *      Capitalize the characters from cursor to end of current word
 307  *      [M-c]
 308  */
 309 protected el_action_t
 310 /*ARGSUSED*/
 311 em_capitol_case(EditLine *el, Int c __attribute__((__unused__)))
 312 {
 313         Char *cp, *ep;
 314
 315         ep = c__next_word(el->el_line.cursor, el->el_line.lastchar,
 316             el->el_state.argument, ce__isword);
 317
 318         for (cp = el->el_line.cursor; cp < ep; cp++) {
 319                 if (Isalpha(*cp)) {
 320                         if (Islower(*cp))
 321                                 *cp = Toupper(*cp);
 322                         cp++;
 323                         break;
 324                 }
 325         }
 326         for (; cp < ep; cp++)
 327                 if (Isupper(*cp))
 328                         *cp = Tolower(*cp);
 329
 330         el->el_line.cursor = ep;
 331         if (el->el_line.cursor > el->el_line.lastchar)
 332                 el->el_line.cursor = el->el_line.lastchar;
 333         return CC_REFRESH;
 334 }
 335
 336
 337 /* em_lower_case():
 338  *      Lowercase the characters from cursor to end of current word
 339  *      [M-l]
 340  */
 341 protected el_action_t
 342 /*ARGSUSED*/
 343 em_lower_case(EditLine *el, Int c __attribute__((__unused__)))
 344 {
 345         Char *cp, *ep;
 346
 347         ep = c__next_word(el->el_line.cursor, el->el_line.lastchar,
 348             el->el_state.argument, ce__isword);
 349
 350         for (cp = el->el_line.cursor; cp < ep; cp++)
 351                 if (Isupper(*cp))
 352                         *cp = Tolower(*cp);
 353
 354         el->el_line.cursor = ep;
 355         if (el->el_line.cursor > el->el_line.lastchar)
 356                 el->el_line.cursor = el->el_line.lastchar;
 357         return CC_REFRESH;
 358 }
 359
 360
 361 /* em_set_mark():
 362  *      Set the mark at cursor
 363  *      [^@]
 364  */
 365 protected el_action_t
 366 /*ARGSUSED*/
 367 em_set_mark(EditLine *el, Int c __attribute__((__unused__)))
 368 {
 369
 370         el->el_chared.c_kill.mark = el->el_line.cursor;
 371         return CC_NORM;
 372 }
 373
 374
 375 /* em_exchange_mark():
 376  *      Exchange the cursor and mark
 377  *      [^X^X]
 378  */
 379 protected el_action_t
 380 /*ARGSUSED*/
 381 em_exchange_mark(EditLine *el, Int c __attribute__((__unused__)))
 382 {
 383         Char *cp;
 384
 385         cp = el->el_line.cursor;
 386         el->el_line.cursor = el->el_chared.c_kill.mark;
 387         el->el_chared.c_kill.mark = cp;
 388         return CC_CURSOR;
 389 }
 390
 391
 392 /* em_universal_argument():
 393  *      Universal argument (argument times 4)
 394  *      [^U]
 395  */
 396 protected el_action_t
 397 /*ARGSUSED*/
 398 em_universal_argument(EditLine *el, Int c __attribute__((__unused__)))
 399 {                               /* multiply current argument by 4 */
 400
 401         if (el->el_state.argument > 1000000)
 402                 return CC_ERROR;
 403         el->el_state.doingarg = 1;
 404         el->el_state.argument *= 4;
 405         return CC_ARGHACK;
 406 }
 407
 408
 409 /* em_meta_next():
 410  *      Add 8th bit to next character typed
 411  *      [<ESC>]
 412  */
 413 protected el_action_t
 414 /*ARGSUSED*/
 415 em_meta_next(EditLine *el, Int c __attribute__((__unused__)))
 416 {
 417
 418         el->el_state.metanext = 1;
 419         return CC_ARGHACK;
 420 }
 421
 422
 423 /* em_toggle_overwrite():
 424  *      Switch from insert to overwrite mode or vice versa
 425  */
 426 protected el_action_t
 427 /*ARGSUSED*/
 428 em_toggle_overwrite(EditLine *el, Int c __attribute__((__unused__)))
 429 {
 430
 431         el->el_state.inputmode = (el->el_state.inputmode == MODE_INSERT) ?
 432             MODE_REPLACE : MODE_INSERT;
 433         return CC_NORM;
 434 }
 435
 436
 437 /* em_copy_prev_word():
 438  *      Copy current word to cursor
 439  */
 440 protected el_action_t
 441 /*ARGSUSED*/
 442 em_copy_prev_word(EditLine *el, Int c __attribute__((__unused__)))
 443 {
 444         Char *cp, *oldc, *dp;
 445
 446         if (el->el_line.cursor == el->el_line.buffer)
 447                 return CC_ERROR;
 448
 449         oldc = el->el_line.cursor;
 450         /* does a bounds check */
 451         cp = c__prev_word(el->el_line.cursor, el->el_line.buffer,
 452             el->el_state.argument, ce__isword);
 453
 454         c_insert(el, (int)(oldc - cp));
 455         for (dp = oldc; cp < oldc && dp < el->el_line.lastchar; cp++)
 456                 *dp++ = *cp;
 457
 458         el->el_line.cursor = dp;/* put cursor at end */
 459
 460         return CC_REFRESH;
 461 }
 462
 463
 464 /* em_inc_search_next():
 465  *      Emacs incremental next search
 466  */
 467 protected el_action_t
 468 /*ARGSUSED*/
 469 em_inc_search_next(EditLine *el, Int c __attribute__((__unused__)))
 470 {
 471
 472         el->el_search.patlen = 0;
 473         return ce_inc_search(el, ED_SEARCH_NEXT_HISTORY);
 474 }
 475
 476
 477 /* em_inc_search_prev():
 478  *      Emacs incremental reverse search
 479  */
 480 protected el_action_t
 481 /*ARGSUSED*/
 482 em_inc_search_prev(EditLine *el, Int c __attribute__((__unused__)))
 483 {
 484
 485         el->el_search.patlen = 0;
 486         return ce_inc_search(el, ED_SEARCH_PREV_HISTORY);
 487 }
 488
 489
 490 /* em_delete_prev_char():
 491  *      Delete the character to the left of the cursor
 492  *      [^?]
 493  */
 494 protected el_action_t
 495 /*ARGSUSED*/
 496 em_delete_prev_char(EditLine *el, Int c __attribute__((__unused__)))
 497 {
 498
 499         if (el->el_line.cursor <= el->el_line.buffer)
 500                 return CC_ERROR;
 501
 502         if (el->el_state.doingarg)
 503                 c_delbefore(el, el->el_state.argument);
 504         else
 505                 c_delbefore1(el);
 506         el->el_line.cursor -= el->el_state.argument;
 507         if (el->el_line.cursor < el->el_line.buffer)
 508                 el->el_line.cursor = el->el_line.buffer;
 509         return CC_REFRESH;
 510 }