1 /* $OpenBSD: emacs.c,v 1.7 2003/11/25 20:12:38 otto Exp $ */ 2 /* $NetBSD: emacs.c,v 1.16 2003/11/02 20:07:58 christos Exp $ */ 3 4 /*- 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Christos Zoulas of Cornell University. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include "config.h" 37 #if !defined(lint) && !defined(SCCSID) 38 #if 0 39 static char sccsid[] = "@(#)emacs.c 8.1 (Berkeley) 6/4/93"; 40 #else 41 static const char rcsid[] = "$OpenBSD: emacs.c,v 1.7 2003/11/25 20:12:38 otto Exp $"; 42 #endif 43 #endif /* not lint && not SCCSID */ 44 45 /* 46 * emacs.c: Emacs functions 47 */ 48 #include "el.h" 49 50 /* em_delete_or_list(): 51 * Delete character under cursor or list completions if at end of line 52 * [^D] 53 */ 54 protected el_action_t 55 /*ARGSUSED*/ 56 em_delete_or_list(EditLine *el, int c __attribute__((__unused__))) 57 { 58 59 if (el->el_line.cursor == el->el_line.lastchar) { 60 /* if I'm at the end */ 61 if (el->el_line.cursor == el->el_line.buffer) { 62 /* and the beginning */ 63 term_overwrite(el, STReof, 4); /* then do a EOF */ 64 term__flush(); 65 return (CC_EOF); 66 } else { 67 /* 68 * Here we could list completions, but it is an 69 * error right now 70 */ 71 term_beep(el); 72 return (CC_ERROR); 73 } 74 } else { 75 c_delafter(el, el->el_state.argument); /* delete after dot */ 76 if (el->el_line.cursor > el->el_line.lastchar) 77 el->el_line.cursor = el->el_line.lastchar; 78 /* bounds check */ 79 return (CC_REFRESH); 80 } 81 } 82 83 84 /* em_delete_next_word(): 85 * Cut from cursor to end of current word 86 * [M-d] 87 */ 88 protected el_action_t 89 /*ARGSUSED*/ 90 em_delete_next_word(EditLine *el, int c __attribute__((__unused__))) 91 { 92 char *cp, *p, *kp; 93 94 if (el->el_line.cursor == el->el_line.lastchar) 95 return (CC_ERROR); 96 97 cp = c__next_word(el->el_line.cursor, el->el_line.lastchar, 98 el->el_state.argument, ce__isword); 99 100 for (p = el->el_line.cursor, kp = el->el_chared.c_kill.buf; p < cp; p++) 101 /* save the text */ 102 *kp++ = *p; 103 el->el_chared.c_kill.last = kp; 104 105 c_delafter(el, cp - el->el_line.cursor); /* delete after dot */ 106 if (el->el_line.cursor > el->el_line.lastchar) 107 el->el_line.cursor = el->el_line.lastchar; 108 /* bounds check */ 109 return (CC_REFRESH); 110 } 111 112 113 /* em_yank(): 114 * Paste cut buffer at cursor position 115 * [^Y] 116 */ 117 protected el_action_t 118 /*ARGSUSED*/ 119 em_yank(EditLine *el, int c __attribute__((__unused__))) 120 { 121 char *kp, *cp; 122 123 if (el->el_chared.c_kill.last == el->el_chared.c_kill.buf) 124 return (CC_NORM); 125 126 if (el->el_line.lastchar + 127 (el->el_chared.c_kill.last - el->el_chared.c_kill.buf) >= 128 el->el_line.limit) 129 return (CC_ERROR); 130 131 el->el_chared.c_kill.mark = el->el_line.cursor; 132 cp = el->el_line.cursor; 133 134 /* open the space, */ 135 c_insert(el, 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 */ 152 protected el_action_t 153 /*ARGSUSED*/ 154 em_kill_line(EditLine *el, int c __attribute__((__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 */ 174 protected el_action_t 175 /*ARGSUSED*/ 176 em_kill_region(EditLine *el, int c __attribute__((__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, 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, 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 */ 207 protected el_action_t 208 /*ARGSUSED*/ 209 em_copy_region(EditLine *el, int c __attribute__((__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 */ 237 protected el_action_t 238 em_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 */ 256 protected el_action_t 257 /*ARGSUSED*/ 258 em_next_word(EditLine *el, int c __attribute__((__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 */ 281 protected el_action_t 282 /*ARGSUSED*/ 283 em_upper_case(EditLine *el, int c __attribute__((__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(*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 */ 305 protected el_action_t 306 /*ARGSUSED*/ 307 em_capitol_case(EditLine *el, int c __attribute__((__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(*cp); 318 cp++; 319 break; 320 } 321 } 322 for (; cp < ep; cp++) 323 if (isupper((unsigned char) *cp)) 324 *cp = tolower(*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 */ 337 protected el_action_t 338 /*ARGSUSED*/ 339 em_lower_case(EditLine *el, int c __attribute__((__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(*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 */ 361 protected el_action_t 362 /*ARGSUSED*/ 363 em_set_mark(EditLine *el, int c __attribute__((__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 */ 375 protected el_action_t 376 /*ARGSUSED*/ 377 em_exchange_mark(EditLine *el, int c __attribute__((__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 */ 392 protected el_action_t 393 /*ARGSUSED*/ 394 em_universal_argument(EditLine *el, int c __attribute__((__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 */ 409 protected el_action_t 410 /*ARGSUSED*/ 411 em_meta_next(EditLine *el, int c __attribute__((__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 */ 422 protected el_action_t 423 /*ARGSUSED*/ 424 em_toggle_overwrite(EditLine *el, int c __attribute__((__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 */ 436 protected el_action_t 437 /*ARGSUSED*/ 438 em_copy_prev_word(EditLine *el, int c __attribute__((__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, 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 */ 463 protected el_action_t 464 /*ARGSUSED*/ 465 em_inc_search_next(EditLine *el, int c __attribute__((__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 */ 476 protected el_action_t 477 /*ARGSUSED*/ 478 em_inc_search_prev(EditLine *el, int c __attribute__((__unused__))) 479 { 480 481 el->el_search.patlen = 0; 482 return (ce_inc_search(el, ED_SEARCH_PREV_HISTORY)); 483 } 484