emacs.c
1 /* $NetBSD: emacs.c,v 1.23 2009/12/30 22:37:40 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 1.23 2009/12/30 22:37:40 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 }