emacs.c revision 296435
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 38static 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: head/lib/libedit/emacs.c 296435 2016-03-06 21:32:54Z pfg $"); 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 */ 55protected el_action_t 56/*ARGSUSED*/ 57em_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 */ 91protected el_action_t 92/*ARGSUSED*/ 93em_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 */ 120protected el_action_t 121/*ARGSUSED*/ 122em_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 */ 156protected el_action_t 157/*ARGSUSED*/ 158em_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 */ 178protected el_action_t 179/*ARGSUSED*/ 180em_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 */ 211protected el_action_t 212/*ARGSUSED*/ 213em_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 */ 241protected el_action_t 242em_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 */ 260protected el_action_t 261/*ARGSUSED*/ 262em_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 */ 285protected el_action_t 286/*ARGSUSED*/ 287em_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 */ 309protected el_action_t 310/*ARGSUSED*/ 311em_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 */ 341protected el_action_t 342/*ARGSUSED*/ 343em_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 */ 365protected el_action_t 366/*ARGSUSED*/ 367em_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 */ 379protected el_action_t 380/*ARGSUSED*/ 381em_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 */ 396protected el_action_t 397/*ARGSUSED*/ 398em_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 */ 413protected el_action_t 414/*ARGSUSED*/ 415em_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 */ 426protected el_action_t 427/*ARGSUSED*/ 428em_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 */ 440protected el_action_t 441/*ARGSUSED*/ 442em_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 */ 467protected el_action_t 468/*ARGSUSED*/ 469em_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 */ 480protected el_action_t 481/*ARGSUSED*/ 482em_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 */ 494protected el_action_t 495/*ARGSUSED*/ 496em_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} 511