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