getch.c revision 1.74
1 /* $NetBSD: getch.c,v 1.74 2020/05/14 11:50:04 simonb Exp $ */ 2 3 /* 4 * Copyright (c) 1981, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)getch.c 8.2 (Berkeley) 5/4/94"; 36 #else 37 __RCSID("$NetBSD: getch.c,v 1.74 2020/05/14 11:50:04 simonb Exp $"); 38 #endif 39 #endif /* not lint */ 40 41 #include <errno.h> 42 #include <string.h> 43 #include <stdlib.h> 44 #include <unistd.h> 45 #include <stdio.h> 46 #include "curses.h" 47 #include "curses_private.h" 48 #include "keymap.h" 49 50 short _cursesi_state; /* state of the inkey function */ 51 52 static const struct tcdata tc[] = { 53 {TICODE_kSAV, KEY_SSAVE}, 54 {TICODE_kSPD, KEY_SSUSPEND}, 55 {TICODE_kUND, KEY_SUNDO}, 56 {TICODE_kHLP, KEY_SHELP}, 57 {TICODE_kHOM, KEY_SHOME}, 58 {TICODE_kIC, KEY_SIC}, 59 {TICODE_kLFT, KEY_SLEFT}, 60 {TICODE_krdo, KEY_REDO}, 61 {TICODE_khlp, KEY_HELP}, 62 {TICODE_kmrk, KEY_MARK}, 63 {TICODE_kmsg, KEY_MESSAGE}, 64 {TICODE_kmov, KEY_MOVE}, 65 {TICODE_knxt, KEY_NEXT}, 66 {TICODE_kopn, KEY_OPEN}, 67 {TICODE_kopt, KEY_OPTIONS}, 68 {TICODE_kprv, KEY_PREVIOUS}, 69 {TICODE_kprt, KEY_PRINT}, 70 {TICODE_kMSG, KEY_SMESSAGE}, 71 {TICODE_kMOV, KEY_SMOVE}, 72 {TICODE_kNXT, KEY_SNEXT}, 73 {TICODE_kOPT, KEY_SOPTIONS}, 74 {TICODE_kPRV, KEY_SPREVIOUS}, 75 {TICODE_kPRT, KEY_SPRINT}, 76 {TICODE_kRDO, KEY_SREDO}, 77 {TICODE_kRPL, KEY_SREPLACE}, 78 {TICODE_kRIT, KEY_SRIGHT}, 79 {TICODE_kRES, KEY_SRSUME}, 80 {TICODE_kCAN, KEY_SCANCEL}, 81 {TICODE_kref, KEY_REFERENCE}, 82 {TICODE_krfr, KEY_REFRESH}, 83 {TICODE_krpl, KEY_REPLACE}, 84 {TICODE_krst, KEY_RESTART}, 85 {TICODE_kres, KEY_RESUME}, 86 {TICODE_ksav, KEY_SAVE}, 87 {TICODE_kspd, KEY_SUSPEND}, 88 {TICODE_kund, KEY_UNDO}, 89 {TICODE_kBEG, KEY_SBEG}, 90 {TICODE_kFND, KEY_SFIND}, 91 {TICODE_kCMD, KEY_SCOMMAND}, 92 {TICODE_kCPY, KEY_SCOPY}, 93 {TICODE_kCRT, KEY_SCREATE}, 94 {TICODE_kDC, KEY_SDC}, 95 {TICODE_kDL, KEY_SDL}, 96 {TICODE_kslt, KEY_SELECT}, 97 {TICODE_kEND, KEY_SEND}, 98 {TICODE_kEOL, KEY_SEOL}, 99 {TICODE_kEXT, KEY_SEXIT}, 100 {TICODE_kfnd, KEY_FIND}, 101 {TICODE_kbeg, KEY_BEG}, 102 {TICODE_kcan, KEY_CANCEL}, 103 {TICODE_kclo, KEY_CLOSE}, 104 {TICODE_kcmd, KEY_COMMAND}, 105 {TICODE_kcpy, KEY_COPY}, 106 {TICODE_kcrt, KEY_CREATE}, 107 {TICODE_kend, KEY_END}, 108 {TICODE_kent, KEY_ENTER}, 109 {TICODE_kext, KEY_EXIT}, 110 {TICODE_kf11, KEY_F(11)}, 111 {TICODE_kf12, KEY_F(12)}, 112 {TICODE_kf13, KEY_F(13)}, 113 {TICODE_kf14, KEY_F(14)}, 114 {TICODE_kf15, KEY_F(15)}, 115 {TICODE_kf16, KEY_F(16)}, 116 {TICODE_kf17, KEY_F(17)}, 117 {TICODE_kf18, KEY_F(18)}, 118 {TICODE_kf19, KEY_F(19)}, 119 {TICODE_kf20, KEY_F(20)}, 120 {TICODE_kf21, KEY_F(21)}, 121 {TICODE_kf22, KEY_F(22)}, 122 {TICODE_kf23, KEY_F(23)}, 123 {TICODE_kf24, KEY_F(24)}, 124 {TICODE_kf25, KEY_F(25)}, 125 {TICODE_kf26, KEY_F(26)}, 126 {TICODE_kf27, KEY_F(27)}, 127 {TICODE_kf28, KEY_F(28)}, 128 {TICODE_kf29, KEY_F(29)}, 129 {TICODE_kf30, KEY_F(30)}, 130 {TICODE_kf31, KEY_F(31)}, 131 {TICODE_kf32, KEY_F(32)}, 132 {TICODE_kf33, KEY_F(33)}, 133 {TICODE_kf34, KEY_F(34)}, 134 {TICODE_kf35, KEY_F(35)}, 135 {TICODE_kf36, KEY_F(36)}, 136 {TICODE_kf37, KEY_F(37)}, 137 {TICODE_kf38, KEY_F(38)}, 138 {TICODE_kf39, KEY_F(39)}, 139 {TICODE_kf40, KEY_F(40)}, 140 {TICODE_kf41, KEY_F(41)}, 141 {TICODE_kf42, KEY_F(42)}, 142 {TICODE_kf43, KEY_F(43)}, 143 {TICODE_kf44, KEY_F(44)}, 144 {TICODE_kf45, KEY_F(45)}, 145 {TICODE_kf46, KEY_F(46)}, 146 {TICODE_kf47, KEY_F(47)}, 147 {TICODE_kf48, KEY_F(48)}, 148 {TICODE_kf49, KEY_F(49)}, 149 {TICODE_kf50, KEY_F(50)}, 150 {TICODE_kf51, KEY_F(51)}, 151 {TICODE_kf52, KEY_F(52)}, 152 {TICODE_kf53, KEY_F(53)}, 153 {TICODE_kf54, KEY_F(54)}, 154 {TICODE_kf55, KEY_F(55)}, 155 {TICODE_kf56, KEY_F(56)}, 156 {TICODE_kf57, KEY_F(57)}, 157 {TICODE_kf58, KEY_F(58)}, 158 {TICODE_kf59, KEY_F(59)}, 159 {TICODE_kf60, KEY_F(60)}, 160 {TICODE_kf61, KEY_F(61)}, 161 {TICODE_kf62, KEY_F(62)}, 162 {TICODE_kf63, KEY_F(63)}, 163 {TICODE_ka1, KEY_A1}, 164 {TICODE_kb2, KEY_B2}, 165 {TICODE_ka3, KEY_A3}, 166 {TICODE_kc1, KEY_C1}, 167 {TICODE_kc3, KEY_C3}, 168 {TICODE_kmous, KEY_MOUSE}, 169 {TICODE_kf0, KEY_F0}, 170 {TICODE_kf1, KEY_F(1)}, 171 {TICODE_kf2, KEY_F(2)}, 172 {TICODE_kf3, KEY_F(3)}, 173 {TICODE_kf4, KEY_F(4)}, 174 {TICODE_kf5, KEY_F(5)}, 175 {TICODE_kf6, KEY_F(6)}, 176 {TICODE_kf7, KEY_F(7)}, 177 {TICODE_kf8, KEY_F(8)}, 178 {TICODE_kf9, KEY_F(9)}, 179 {TICODE_kf10, KEY_F(10)}, 180 {TICODE_kil1, KEY_IL}, 181 {TICODE_ktbc, KEY_CATAB}, 182 {TICODE_kcbt, KEY_BTAB}, 183 {TICODE_kbs, KEY_BACKSPACE}, 184 {TICODE_kclr, KEY_CLEAR}, 185 {TICODE_kdch1, KEY_DC}, 186 {TICODE_kcud1, KEY_DOWN}, 187 {TICODE_kel, KEY_EOL}, 188 {TICODE_kind, KEY_SF}, 189 {TICODE_kll, KEY_LL}, 190 {TICODE_khome, KEY_HOME}, 191 {TICODE_kich1, KEY_IC}, 192 {TICODE_kdl1, KEY_DL}, 193 {TICODE_kcub1, KEY_LEFT}, 194 {TICODE_krmir, KEY_EIC}, 195 {TICODE_knp, KEY_NPAGE}, 196 {TICODE_kpp, KEY_PPAGE}, 197 {TICODE_kri, KEY_SR}, 198 {TICODE_kcuf1, KEY_RIGHT}, 199 {TICODE_ked, KEY_EOS}, 200 {TICODE_khts, KEY_STAB}, 201 {TICODE_kctab, KEY_CTAB}, 202 {TICODE_kcuu1, KEY_UP} 203 }; 204 /* Number of TC entries .... */ 205 static const int num_tcs = (sizeof(tc) / sizeof(struct tcdata)); 206 207 /* Key buffer */ 208 #define INBUF_SZ 16 /* size of key buffer - must be larger than 209 * longest multi-key sequence */ 210 static wchar_t inbuf[INBUF_SZ]; 211 static int start, end, working; /* pointers for manipulating inbuf data */ 212 213 /* prototypes for private functions */ 214 static void add_key_sequence(SCREEN *screen, char *sequence, int key_type); 215 static key_entry_t *add_new_key(keymap_t *current, char ch, int key_type, 216 int symbol); 217 static void delete_key_sequence(keymap_t *current, int key_type); 218 static void do_keyok(keymap_t *current, int key_type, bool set, bool flag, 219 int *retval); 220 static keymap_t *new_keymap(void); /* create a new keymap */ 221 static key_entry_t *new_key(void); /* create a new key entry */ 222 static wchar_t inkey(int to, int delay); 223 224 /* 225 * Free the storage associated with the given keymap 226 */ 227 void 228 _cursesi_free_keymap(keymap_t *map) 229 { 230 int i; 231 232 /* check for, and free, child keymaps */ 233 for (i = 0; i < MAX_CHAR; i++) { 234 if (map->mapping[i] >= 0) { 235 if (map->key[map->mapping[i]]->type == KEYMAP_MULTI) 236 _cursesi_free_keymap( 237 map->key[map->mapping[i]]->value.next); 238 } 239 } 240 241 /* now free any allocated keymap structs */ 242 for (i = 0; i < map->count; i += KEYMAP_ALLOC_CHUNK) { 243 free(map->key[i]); 244 } 245 246 free(map->key); 247 free(map); 248 } 249 250 251 /* 252 * Add a new key entry to the keymap pointed to by current. Entry 253 * contains the character to add to the keymap, type is the type of 254 * entry to add (either multikey or leaf) and symbol is the symbolic 255 * value for a leaf type entry. The function returns a pointer to the 256 * new keymap entry. 257 */ 258 static key_entry_t * 259 add_new_key(keymap_t *current, char chr, int key_type, int symbol) 260 { 261 key_entry_t *the_key; 262 int i, ki; 263 264 #ifdef DEBUG 265 __CTRACE(__CTRACE_MISC, 266 "Adding character %s of type %d, symbol 0x%x\n", 267 unctrl(chr), key_type, symbol); 268 #endif 269 if (current->mapping[(unsigned char)chr] < 0) { 270 if (current->mapping[(unsigned char)chr] == MAPPING_UNUSED) { 271 /* first time for this char */ 272 current->mapping[(unsigned char)chr] = 273 current->count; /* map new entry */ 274 ki = current->count; 275 276 /* make sure we have room in the key array first */ 277 if ((current->count & (KEYMAP_ALLOC_CHUNK - 1)) == 0) 278 { 279 if ((current->key = 280 realloc(current->key, 281 ki * sizeof(key_entry_t *) 282 + KEYMAP_ALLOC_CHUNK * sizeof(key_entry_t *))) == NULL) { 283 fprintf(stderr, 284 "Could not malloc for key entry\n"); 285 exit(1); 286 } 287 288 the_key = new_key(); 289 for (i = 0; i < KEYMAP_ALLOC_CHUNK; i++) { 290 current->key[ki + i] = &the_key[i]; 291 } 292 } 293 } else { 294 /* the mapping was used but freed, reuse it */ 295 ki = - current->mapping[(unsigned char) chr]; 296 current->mapping[(unsigned char) chr] = ki; 297 } 298 299 current->count++; 300 301 /* point at the current key array element to use */ 302 the_key = current->key[ki]; 303 304 the_key->type = key_type; 305 306 switch (key_type) { 307 case KEYMAP_MULTI: 308 /* need for next key */ 309 #ifdef DEBUG 310 __CTRACE(__CTRACE_MISC, "Creating new keymap\n"); 311 #endif 312 the_key->value.next = new_keymap(); 313 the_key->enable = TRUE; 314 break; 315 316 case KEYMAP_LEAF: 317 /* the associated symbol for the key */ 318 #ifdef DEBUG 319 __CTRACE(__CTRACE_MISC, "Adding leaf key\n"); 320 #endif 321 the_key->value.symbol = symbol; 322 the_key->enable = TRUE; 323 break; 324 325 default: 326 fprintf(stderr, "add_new_key: bad type passed\n"); 327 exit(1); 328 } 329 } else { 330 /* the key is already known - just return the address. */ 331 #ifdef DEBUG 332 __CTRACE(__CTRACE_MISC, "Keymap already known\n"); 333 #endif 334 the_key = current->key[current->mapping[(unsigned char)chr]]; 335 } 336 337 return the_key; 338 } 339 340 /* 341 * Delete the given key symbol from the key mappings for the screen. 342 * 343 */ 344 static void 345 delete_key_sequence(keymap_t *current, int key_type) 346 { 347 key_entry_t *key; 348 int i; 349 350 /* 351 * we need to iterate over all the keys as there may be 352 * multiple instances of the leaf symbol. 353 */ 354 for (i = 0; i < MAX_CHAR; i++) { 355 if (current->mapping[i] < 0) 356 continue; /* no mapping for the key, next! */ 357 358 key = current->key[current->mapping[i]]; 359 360 if (key->type == KEYMAP_MULTI) { 361 /* have not found the leaf, recurse down */ 362 delete_key_sequence(key->value.next, key_type); 363 /* if we deleted the last key in the map, free */ 364 if (key->value.next->count == 0) 365 _cursesi_free_keymap(key->value.next); 366 } else if ((key->type == KEYMAP_LEAF) 367 && (key->value.symbol == key_type)) { 368 #ifdef DEBUG 369 __CTRACE(__CTRACE_INPUT, "delete_key_sequence: found keysym %d, deleting\n", 370 key_type); 371 #endif 372 key->enable = FALSE; 373 } 374 } 375 } 376 377 /* 378 * Add the sequence of characters given in sequence as the key mapping 379 * for the given key symbol. 380 */ 381 static void 382 add_key_sequence(SCREEN *screen, char *sequence, int key_type) 383 { 384 key_entry_t *tmp_key; 385 keymap_t *current; 386 int length, j, key_ent; 387 388 #ifdef DEBUG 389 __CTRACE(__CTRACE_MISC, "add_key_sequence: add key sequence: %s(%s)\n", 390 sequence, keyname(key_type)); 391 #endif /* DEBUG */ 392 current = screen->base_keymap; /* always start with 393 * base keymap. */ 394 length = (int)strlen(sequence); 395 396 /* 397 * OK - we really should never get a zero length string here, either 398 * the terminfo entry is there and it has a value or we are not called 399 * at all. Unfortunately, if someone assigns a terminfo string to the 400 * ^@ value we get passed a null string which messes up our length. 401 * So, if we get a null string then just insert a leaf value in 402 * the 0th char position of the root keymap. Note that we are 403 * totally screwed if someone terminates a multichar sequence 404 * with ^@... oh well. 405 */ 406 if (length == 0) 407 length = 1; 408 409 for (j = 0; j < length - 1; j++) { 410 /* add the entry to the struct */ 411 tmp_key = add_new_key(current, sequence[j], KEYMAP_MULTI, 0); 412 413 /* index into the key array - it's 414 clearer if we stash this */ 415 key_ent = current->mapping[(unsigned char) sequence[j]]; 416 417 current->key[key_ent] = tmp_key; 418 419 /* next key uses this map... */ 420 current = current->key[key_ent]->value.next; 421 } 422 423 /* 424 * This is the last key in the sequence (it may have been the 425 * only one but that does not matter) this means it is a leaf 426 * key and should have a symbol associated with it. 427 */ 428 tmp_key = add_new_key(current, sequence[length - 1], KEYMAP_LEAF, 429 key_type); 430 current->key[current->mapping[(int)sequence[length - 1]]] = tmp_key; 431 } 432 433 /* 434 * Init_getch - initialise all the pointers & structures needed to make 435 * getch work in keypad mode. 436 * 437 */ 438 void 439 __init_getch(SCREEN *screen) 440 { 441 char entry[1024], *p; 442 const char *s; 443 int i; 444 size_t limit, l; 445 #ifdef DEBUG 446 int k, length; 447 #endif 448 449 /* init the inkey state variable */ 450 _cursesi_state = INKEY_NORM; 451 452 /* init the base keymap */ 453 screen->base_keymap = new_keymap(); 454 455 /* key input buffer pointers */ 456 start = end = working = 0; 457 458 /* now do the terminfo snarfing ... */ 459 460 for (i = 0; i < num_tcs; i++) { 461 p = entry; 462 limit = 1023; 463 s = screen->term->strs[tc[i].code]; 464 if (s == NULL) 465 continue; 466 l = strlen(s) + 1; 467 if (limit < l) 468 continue; 469 strlcpy(p, s, limit); 470 p += l; 471 limit -= l; 472 #ifdef DEBUG 473 __CTRACE(__CTRACE_INIT, 474 "Processing terminfo entry %d, sequence ", 475 tc[i].code); 476 length = (int) strlen(entry); 477 for (k = 0; k <= length -1; k++) 478 __CTRACE(__CTRACE_INIT, "%s", unctrl(entry[k])); 479 __CTRACE(__CTRACE_INIT, "\n"); 480 #endif 481 add_key_sequence(screen, entry, tc[i].symbol); 482 } 483 } 484 485 486 /* 487 * new_keymap - allocates & initialises a new keymap structure. This 488 * function returns a pointer to the new keymap. 489 * 490 */ 491 static keymap_t * 492 new_keymap(void) 493 { 494 int i; 495 keymap_t *new_map; 496 497 if ((new_map = malloc(sizeof(keymap_t))) == NULL) { 498 perror("Inkey: Cannot allocate new keymap"); 499 exit(2); 500 } 501 502 /* Initialise the new map */ 503 new_map->count = 0; 504 for (i = 0; i < MAX_CHAR; i++) { 505 new_map->mapping[i] = MAPPING_UNUSED; /* no mapping for char */ 506 } 507 508 /* key array will be allocated when first key is added */ 509 new_map->key = NULL; 510 511 return new_map; 512 } 513 514 /* 515 * new_key - allocates & initialises a new key entry. This function returns 516 * a pointer to the newly allocated key entry. 517 * 518 */ 519 static key_entry_t * 520 new_key(void) 521 { 522 key_entry_t *new_one; 523 int i; 524 525 new_one = malloc(KEYMAP_ALLOC_CHUNK * sizeof(key_entry_t)); 526 if (new_one == NULL) { 527 perror("inkey: Cannot allocate new key entry chunk"); 528 exit(2); 529 } 530 531 for (i = 0; i < KEYMAP_ALLOC_CHUNK; i++) { 532 new_one[i].type = 0; 533 new_one[i].value.next = NULL; 534 } 535 536 return new_one; 537 } 538 539 /* 540 * inkey - do the work to process keyboard input, check for multi-key 541 * sequences and return the appropriate symbol if we get a match. 542 * 543 */ 544 545 static wchar_t 546 inkey(int to, int delay) 547 { 548 wchar_t k; 549 int c, mapping; 550 keymap_t *current = _cursesi_screen->base_keymap; 551 FILE *infd = _cursesi_screen->infd; 552 553 k = 0; /* XXX gcc -Wuninitialized */ 554 555 #ifdef DEBUG 556 __CTRACE(__CTRACE_INPUT, "inkey (%d, %d)\n", to, delay); 557 #endif 558 for (;;) { /* loop until we get a complete key sequence */ 559 reread: 560 if (_cursesi_state == INKEY_NORM) { 561 if (delay && __timeout(delay) == ERR) 562 return ERR; 563 c = __fgetc_resize(infd); 564 if (c == ERR || c == KEY_RESIZE) { 565 clearerr(infd); 566 return c; 567 } 568 569 if (delay && (__notimeout() == ERR)) 570 return ERR; 571 572 k = (wchar_t)c; 573 #ifdef DEBUG 574 __CTRACE(__CTRACE_INPUT, 575 "inkey (state normal) got '%s'\n", unctrl(k)); 576 #endif 577 578 working = start; 579 inbuf[working] = k; 580 INC_POINTER(working); 581 end = working; 582 583 /* go to the assembling state now */ 584 _cursesi_state = INKEY_ASSEMBLING; 585 586 } else if (_cursesi_state == INKEY_BACKOUT) { 587 k = inbuf[working]; 588 INC_POINTER(working); 589 if (working == end) { /* see if we have run 590 * out of keys in the 591 * backlog */ 592 593 /* if we have then switch to assembling */ 594 _cursesi_state = INKEY_ASSEMBLING; 595 } 596 } else if (_cursesi_state == INKEY_ASSEMBLING) { 597 /* assembling a key sequence */ 598 if (delay) { 599 if (__timeout(to ? (ESCDELAY / 100) : delay) 600 == ERR) 601 return ERR; 602 } else { 603 if (to && (__timeout(ESCDELAY / 100) == ERR)) 604 return ERR; 605 } 606 607 c = __fgetc_resize(infd); 608 if (ferror(infd)) { 609 clearerr(infd); 610 return c; 611 } 612 613 if ((to || delay) && (__notimeout() == ERR)) 614 return ERR; 615 616 #ifdef DEBUG 617 __CTRACE(__CTRACE_INPUT, 618 "inkey (state assembling) got '%s'\n", unctrl(k)); 619 #endif 620 if (feof(infd) || c == -1) { /* inter-char timeout, 621 * start backing out */ 622 clearerr(infd); 623 if (start == end) 624 /* no chars in the buffer, restart */ 625 goto reread; 626 627 k = inbuf[start]; 628 _cursesi_state = INKEY_TIMEOUT; 629 } else { 630 k = (wchar_t) c; 631 inbuf[working] = k; 632 INC_POINTER(working); 633 end = working; 634 } 635 } else { 636 fprintf(stderr, "Inkey state screwed - exiting!!!"); 637 exit(2); 638 } 639 640 /* 641 * Check key has no special meaning and we have not 642 * timed out and the key has not been disabled 643 */ 644 mapping = current->mapping[k]; 645 if (((_cursesi_state == INKEY_TIMEOUT) || (mapping < 0)) 646 || ((current->key[mapping]->type == KEYMAP_LEAF) 647 && (current->key[mapping]->enable == FALSE))) { 648 /* return the first key we know about */ 649 k = inbuf[start]; 650 651 INC_POINTER(start); 652 working = start; 653 654 if (start == end) { /* only one char processed */ 655 _cursesi_state = INKEY_NORM; 656 } else {/* otherwise we must have more than one char 657 * to backout */ 658 _cursesi_state = INKEY_BACKOUT; 659 } 660 return k; 661 } else { /* must be part of a multikey sequence */ 662 /* check for completed key sequence */ 663 if (current->key[current->mapping[k]]->type == KEYMAP_LEAF) { 664 start = working; /* eat the key sequence 665 * in inbuf */ 666 667 /* check if inbuf empty now */ 668 if (start == end) { 669 /* if it is go back to normal */ 670 _cursesi_state = INKEY_NORM; 671 } else { 672 /* otherwise go to backout state */ 673 _cursesi_state = INKEY_BACKOUT; 674 } 675 676 /* return the symbol */ 677 return current->key[current->mapping[k]]->value.symbol; 678 679 } else { 680 /* 681 * Step on to next part of the multi-key 682 * sequence. 683 */ 684 current = current->key[current->mapping[k]]->value.next; 685 } 686 } 687 } 688 } 689 690 #ifndef _CURSES_USE_MACROS 691 /* 692 * getch -- 693 * Read in a character from stdscr. 694 */ 695 int 696 getch(void) 697 { 698 return wgetch(stdscr); 699 } 700 701 /* 702 * mvgetch -- 703 * Read in a character from stdscr at the given location. 704 */ 705 int 706 mvgetch(int y, int x) 707 { 708 return mvwgetch(stdscr, y, x); 709 } 710 711 /* 712 * mvwgetch -- 713 * Read in a character from stdscr at the given location in the 714 * given window. 715 */ 716 int 717 mvwgetch(WINDOW *win, int y, int x) 718 { 719 if (wmove(win, y, x) == ERR) 720 return ERR; 721 722 return wgetch(win); 723 } 724 725 #endif 726 727 /* 728 * keyok -- 729 * Set the enable flag for a keysym, if the flag is false then 730 * getch will not return this keysym even if the matching key sequence 731 * is seen. 732 */ 733 int 734 keyok(int key_type, bool flag) 735 { 736 int result = ERR; 737 738 if (_cursesi_screen != NULL) 739 do_keyok(_cursesi_screen->base_keymap, key_type, 740 true, flag, &result); 741 return result; 742 } 743 744 /* 745 * do_keyok -- 746 * Does the actual work for keyok, we need to recurse through the 747 * keymaps finding the passed key symbol. 748 */ 749 static void 750 do_keyok(keymap_t *current, int key_type, bool set, bool flag, int *retval) 751 { 752 key_entry_t *key; 753 int i; 754 755 /* 756 * we need to iterate over all the keys as there may be 757 * multiple instances of the leaf symbol. 758 */ 759 for (i = 0; i < MAX_CHAR; i++) { 760 if (current->mapping[i] < 0) 761 continue; /* no mapping for the key, next! */ 762 763 key = current->key[current->mapping[i]]; 764 765 if (key->type == KEYMAP_MULTI) 766 do_keyok(key->value.next, key_type, set, flag, retval); 767 else if ((key->type == KEYMAP_LEAF) 768 && (key->value.symbol == key_type)) { 769 if (set) 770 key->enable = flag; 771 *retval = OK; /* we found at least one instance, ok */ 772 } 773 } 774 } 775 776 /* 777 * define_key -- 778 * Add a custom mapping of a key sequence to key symbol. 779 * 780 */ 781 int 782 define_key(char *sequence, int symbol) 783 { 784 785 if (symbol <= 0 || _cursesi_screen == NULL) 786 return ERR; 787 788 if (sequence == NULL) { 789 #ifdef DEBUG 790 __CTRACE(__CTRACE_INPUT, "define_key: deleting keysym %d\n", 791 symbol); 792 #endif 793 delete_key_sequence(_cursesi_screen->base_keymap, symbol); 794 } else 795 add_key_sequence(_cursesi_screen, sequence, symbol); 796 797 return OK; 798 } 799 800 /* 801 * wgetch -- 802 * Read in a character from the window. 803 */ 804 int 805 wgetch(WINDOW *win) 806 { 807 int inp, weset; 808 int c; 809 FILE *infd = _cursesi_screen->infd; 810 811 #ifdef DEBUG 812 __CTRACE(__CTRACE_INPUT, "wgetch: win(%p)\n", win); 813 #endif 814 if (win == NULL) 815 return ERR; 816 if (!(win->flags & __SCROLLOK) && (win->flags & __FULLWIN) 817 && win->curx == win->maxx - 1 && win->cury == win->maxy - 1 818 && __echoit) 819 return ERR; 820 821 if (is_wintouched(win)) 822 wrefresh(win); 823 else { 824 if ((_cursesi_screen->curscr->cury != (win->begy + win->cury)) 825 || (_cursesi_screen->curscr->curx != (win->begx + win->curx))) { 826 #ifdef DEBUG 827 __CTRACE(__CTRACE_INPUT, "wgetch: curscr cury %d cury %d curscr curx %d curx %d\n", 828 _cursesi_screen->curscr->cury, win->begy + win->cury, 829 _cursesi_screen->curscr->curx, win->begx + win->curx); 830 #endif 831 /* 832 * Just in case the window is not dirty but the 833 * cursor was moved, check and update the 834 * cursor location. 835 */ 836 mvcur(_cursesi_screen->curscr->cury, 837 _cursesi_screen->curscr->curx, 838 win->cury + win->begy, win->curx + win->begx); 839 _cursesi_screen->curscr->cury = 840 win->cury + win->begy; 841 _cursesi_screen->curscr->curx = 842 win->curx + win->begx; 843 } 844 } 845 846 #ifdef DEBUG 847 __CTRACE(__CTRACE_INPUT, "wgetch: __echoit = %d, " 848 "__rawmode = %d, __nl = %d, flags = %#.4x, delay = %d\n", 849 __echoit, __rawmode, _cursesi_screen->nl, win->flags, win->delay); 850 #endif 851 if (_cursesi_screen->resized) { 852 resizeterm(LINES, COLS); 853 _cursesi_screen->resized = 0; 854 #ifdef DEBUG 855 __CTRACE(__CTRACE_INPUT, "wgetch returning KEY_RESIZE\n"); 856 #endif 857 return KEY_RESIZE; 858 } 859 if (_cursesi_screen->unget_pos) { 860 #ifdef DEBUG 861 __CTRACE(__CTRACE_INPUT, "wgetch returning char at %d\n", 862 _cursesi_screen->unget_pos); 863 #endif 864 _cursesi_screen->unget_pos--; 865 c = _cursesi_screen->unget_list[_cursesi_screen->unget_pos]; 866 if (__echoit) 867 waddch(win, (chtype) c); 868 return c; 869 } 870 if (__echoit && !__rawmode) { 871 cbreak(); 872 weset = 1; 873 } else 874 weset = 0; 875 876 __save_termios(); 877 878 if (win->flags & __KEYPAD) { 879 switch (win->delay) { 880 case -1: 881 inp = inkey (win->flags & __NOTIMEOUT ? 0 : 1, 0); 882 break; 883 case 0: 884 if (__nodelay() == ERR) 885 return ERR; 886 inp = inkey(0, 0); 887 break; 888 default: 889 inp = inkey(win->flags & __NOTIMEOUT ? 0 : 1, win->delay); 890 break; 891 } 892 } else { 893 switch (win->delay) { 894 case -1: 895 if (__delay() == ERR) 896 return ERR; 897 break; 898 case 0: 899 if (__nodelay() == ERR) 900 return ERR; 901 break; 902 default: 903 if (__timeout(win->delay) == ERR) 904 return ERR; 905 break; 906 } 907 908 inp = __fgetc_resize(infd); 909 if (inp == ERR || inp == KEY_RESIZE) { 910 clearerr(infd); 911 __restore_termios(); 912 return inp; 913 } 914 } 915 #ifdef DEBUG 916 if (inp > 255) 917 /* we have a key symbol - treat it differently */ 918 /* XXXX perhaps __unctrl should be expanded to include 919 * XXXX the keysyms in the table.... 920 */ 921 __CTRACE(__CTRACE_INPUT, "wgetch assembled keysym 0x%x\n", inp); 922 else 923 __CTRACE(__CTRACE_INPUT, "wgetch got '%s'\n", unctrl(inp)); 924 #endif 925 if (win->delay > -1) { 926 if (__delay() == ERR) 927 return ERR; 928 } 929 930 __restore_termios(); 931 932 if ((__echoit) && (inp < KEY_MIN)) 933 waddch(win, (chtype) inp); 934 935 if (weset) 936 nocbreak(); 937 938 if (_cursesi_screen->nl && inp == 13) 939 inp = 10; 940 941 return ((inp < 0) || (inp == ERR) ? ERR : inp); 942 } 943 944 /* 945 * ungetch -- 946 * Put the character back into the input queue. 947 */ 948 int 949 ungetch(int c) 950 { 951 return __unget((wint_t)c); 952 } 953 954 /* 955 * __unget -- 956 * Do the work for ungetch() and unget_wch(); 957 */ 958 int 959 __unget(wint_t c) 960 { 961 wchar_t *p; 962 int len; 963 964 #ifdef DEBUG 965 __CTRACE(__CTRACE_INPUT, "__unget(%x)\n", c); 966 #endif 967 if (_cursesi_screen == NULL) 968 return ERR; 969 if (_cursesi_screen->unget_pos >= _cursesi_screen->unget_len) { 970 len = _cursesi_screen->unget_len + 32; 971 if ((p = realloc(_cursesi_screen->unget_list, 972 sizeof(wchar_t) * len)) == NULL) { 973 /* Can't realloc(), so just lose the oldest entry */ 974 memmove(_cursesi_screen->unget_list, 975 _cursesi_screen->unget_list + sizeof(wchar_t), 976 _cursesi_screen->unget_len - 1); 977 _cursesi_screen->unget_list[_cursesi_screen->unget_len 978 - 1] = c; 979 _cursesi_screen->unget_pos = 980 _cursesi_screen->unget_len; 981 return OK; 982 } else { 983 _cursesi_screen->unget_pos = 984 _cursesi_screen->unget_len; 985 _cursesi_screen->unget_len = len; 986 _cursesi_screen->unget_list = p; 987 } 988 } 989 _cursesi_screen->unget_list[_cursesi_screen->unget_pos] = c; 990 _cursesi_screen->unget_pos++; 991 return OK; 992 } 993 994 int 995 has_key(int key_type) 996 { 997 int result = ERR; 998 999 if (_cursesi_screen != NULL) 1000 do_keyok(_cursesi_screen->base_keymap, key_type, 1001 false, false, &result); 1002 return result; 1003 } 1004 1005 /* 1006 * set_escdelay -- 1007 * Sets the escape delay for the current screen. 1008 */ 1009 int 1010 set_escdelay(int escdelay) 1011 { 1012 1013 if (_cursesi_screen == NULL) 1014 return ERR; 1015 _cursesi_screen->ESCDELAY = escdelay; 1016 ESCDELAY = escdelay; 1017 return OK; 1018 } 1019 1020 /* 1021 * __fgetc_resize -- 1022 * Any call to fgetc(3) should use this function instead 1023 * and test for the return value of KEY_RESIZE as well as ERR. 1024 */ 1025 int 1026 __fgetc_resize(FILE *infd) 1027 { 1028 int c; 1029 1030 c = fgetc(infd); 1031 if (c != EOF) 1032 return c; 1033 1034 if (!ferror(infd) || errno != EINTR || !_cursesi_screen->resized) 1035 return ERR; 1036 #ifdef DEBUG 1037 __CTRACE(__CTRACE_INPUT, "__fgetc_resize returning KEY_RESIZE\n"); 1038 #endif 1039 resizeterm(LINES, COLS); 1040 _cursesi_screen->resized = 0; 1041 return KEY_RESIZE; 1042 } 1043
Indexes created Wed Sep 24 15:09:51 GMT 2025