getch.c revision 1.61
1 /* $NetBSD: getch.c,v 1.61 2017/01/05 20:31:37 roy 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 1.61 2017/01/05 20:31:37 roy Exp $"); 38 #endif 39 #endif /* not lint */ 40 41 #include <string.h> 42 #include <stdlib.h> 43 #include <unistd.h> 44 #include <stdio.h> 45 #include "curses.h" 46 #include "curses_private.h" 47 #include "keymap.h" 48 49 short state; /* state of the inkey function */ 50 51 static const struct tcdata tc[] = { 52 {TICODE_kSAV, KEY_SSAVE}, 53 {TICODE_kSPD, KEY_SSUSPEND}, 54 {TICODE_kUND, KEY_SUNDO}, 55 {TICODE_kHLP, KEY_SHELP}, 56 {TICODE_kHOM, KEY_SHOME}, 57 {TICODE_kIC, KEY_SIC}, 58 {TICODE_kLFT, KEY_SLEFT}, 59 {TICODE_krdo, KEY_REDO}, 60 {TICODE_khlp, KEY_HELP}, 61 {TICODE_kmrk, KEY_MARK}, 62 {TICODE_kmsg, KEY_MESSAGE}, 63 {TICODE_kmov, KEY_MOVE}, 64 {TICODE_knxt, KEY_NEXT}, 65 {TICODE_kopn, KEY_OPEN}, 66 {TICODE_kopt, KEY_OPTIONS}, 67 {TICODE_kprv, KEY_PREVIOUS}, 68 {TICODE_kprt, KEY_PRINT}, 69 {TICODE_kMSG, KEY_SMESSAGE}, 70 {TICODE_kMOV, KEY_SMOVE}, 71 {TICODE_kNXT, KEY_SNEXT}, 72 {TICODE_kOPT, KEY_SOPTIONS}, 73 {TICODE_kPRV, KEY_SPREVIOUS}, 74 {TICODE_kPRT, KEY_SPRINT}, 75 {TICODE_kRDO, KEY_SREDO}, 76 {TICODE_kRPL, KEY_SREPLACE}, 77 {TICODE_kRIT, KEY_SRIGHT}, 78 {TICODE_kRES, KEY_SRSUME}, 79 {TICODE_kCAN, KEY_SCANCEL}, 80 {TICODE_kref, KEY_REFERENCE}, 81 {TICODE_krfr, KEY_REFRESH}, 82 {TICODE_krpl, KEY_REPLACE}, 83 {TICODE_krst, KEY_RESTART}, 84 {TICODE_kres, KEY_RESUME}, 85 {TICODE_ksav, KEY_SAVE}, 86 {TICODE_kspd, KEY_SUSPEND}, 87 {TICODE_kund, KEY_UNDO}, 88 {TICODE_kBEG, KEY_SBEG}, 89 {TICODE_kFND, KEY_SFIND}, 90 {TICODE_kCMD, KEY_SCOMMAND}, 91 {TICODE_kCPY, KEY_SCOPY}, 92 {TICODE_kCRT, KEY_SCREATE}, 93 {TICODE_kDC, KEY_SDC}, 94 {TICODE_kDL, KEY_SDL}, 95 {TICODE_kslt, KEY_SELECT}, 96 {TICODE_kEND, KEY_SEND}, 97 {TICODE_kEOL, KEY_SEOL}, 98 {TICODE_kEXT, KEY_SEXIT}, 99 {TICODE_kfnd, KEY_FIND}, 100 {TICODE_kbeg, KEY_BEG}, 101 {TICODE_kcan, KEY_CANCEL}, 102 {TICODE_kclo, KEY_CLOSE}, 103 {TICODE_kcmd, KEY_COMMAND}, 104 {TICODE_kcpy, KEY_COPY}, 105 {TICODE_kcrt, KEY_CREATE}, 106 {TICODE_kend, KEY_END}, 107 {TICODE_kent, KEY_ENTER}, 108 {TICODE_kext, KEY_EXIT}, 109 {TICODE_kf11, KEY_F(11)}, 110 {TICODE_kf12, KEY_F(12)}, 111 {TICODE_kf13, KEY_F(13)}, 112 {TICODE_kf14, KEY_F(14)}, 113 {TICODE_kf15, KEY_F(15)}, 114 {TICODE_kf16, KEY_F(16)}, 115 {TICODE_kf17, KEY_F(17)}, 116 {TICODE_kf18, KEY_F(18)}, 117 {TICODE_kf19, KEY_F(19)}, 118 {TICODE_kf20, KEY_F(20)}, 119 {TICODE_kf21, KEY_F(21)}, 120 {TICODE_kf22, KEY_F(22)}, 121 {TICODE_kf23, KEY_F(23)}, 122 {TICODE_kf24, KEY_F(24)}, 123 {TICODE_kf25, KEY_F(25)}, 124 {TICODE_kf26, KEY_F(26)}, 125 {TICODE_kf27, KEY_F(27)}, 126 {TICODE_kf28, KEY_F(28)}, 127 {TICODE_kf29, KEY_F(29)}, 128 {TICODE_kf30, KEY_F(30)}, 129 {TICODE_kf31, KEY_F(31)}, 130 {TICODE_kf32, KEY_F(32)}, 131 {TICODE_kf33, KEY_F(33)}, 132 {TICODE_kf34, KEY_F(34)}, 133 {TICODE_kf35, KEY_F(35)}, 134 {TICODE_kf36, KEY_F(36)}, 135 {TICODE_kf37, KEY_F(37)}, 136 {TICODE_kf38, KEY_F(38)}, 137 {TICODE_kf39, KEY_F(39)}, 138 {TICODE_kf40, KEY_F(40)}, 139 {TICODE_kf41, KEY_F(41)}, 140 {TICODE_kf42, KEY_F(42)}, 141 {TICODE_kf43, KEY_F(43)}, 142 {TICODE_kf44, KEY_F(44)}, 143 {TICODE_kf45, KEY_F(45)}, 144 {TICODE_kf46, KEY_F(46)}, 145 {TICODE_kf47, KEY_F(47)}, 146 {TICODE_kf48, KEY_F(48)}, 147 {TICODE_kf49, KEY_F(49)}, 148 {TICODE_kf50, KEY_F(50)}, 149 {TICODE_kf51, KEY_F(51)}, 150 {TICODE_kf52, KEY_F(52)}, 151 {TICODE_kf53, KEY_F(53)}, 152 {TICODE_kf54, KEY_F(54)}, 153 {TICODE_kf55, KEY_F(55)}, 154 {TICODE_kf56, KEY_F(56)}, 155 {TICODE_kf57, KEY_F(57)}, 156 {TICODE_kf58, KEY_F(58)}, 157 {TICODE_kf59, KEY_F(59)}, 158 {TICODE_kf60, KEY_F(60)}, 159 {TICODE_kf61, KEY_F(61)}, 160 {TICODE_kf62, KEY_F(62)}, 161 {TICODE_kf63, KEY_F(63)}, 162 {TICODE_ka1, KEY_A1}, 163 {TICODE_kb2, KEY_B2}, 164 {TICODE_ka3, KEY_A3}, 165 {TICODE_kc1, KEY_C1}, 166 {TICODE_kc3, KEY_C3}, 167 {TICODE_kmous, KEY_MOUSE}, 168 {TICODE_kf0, KEY_F0}, 169 {TICODE_kf1, KEY_F(1)}, 170 {TICODE_kf2, KEY_F(2)}, 171 {TICODE_kf3, KEY_F(3)}, 172 {TICODE_kf4, KEY_F(4)}, 173 {TICODE_kf5, KEY_F(5)}, 174 {TICODE_kf6, KEY_F(6)}, 175 {TICODE_kf7, KEY_F(7)}, 176 {TICODE_kf8, KEY_F(8)}, 177 {TICODE_kf9, KEY_F(9)}, 178 {TICODE_kf10, KEY_F(10)}, 179 {TICODE_kil1, KEY_IL}, 180 {TICODE_ktbc, KEY_CATAB}, 181 {TICODE_kcbt, KEY_BTAB}, 182 {TICODE_kbs, KEY_BACKSPACE}, 183 {TICODE_kclr, KEY_CLEAR}, 184 {TICODE_kdch1, KEY_DC}, 185 {TICODE_kcud1, KEY_DOWN}, 186 {TICODE_kel, KEY_EOL}, 187 {TICODE_kind, KEY_SF}, 188 {TICODE_kll, KEY_LL}, 189 {TICODE_khome, KEY_HOME}, 190 {TICODE_kich1, KEY_IC}, 191 {TICODE_kdl1, KEY_DL}, 192 {TICODE_kcub1, KEY_LEFT}, 193 {TICODE_krmir, KEY_EIC}, 194 {TICODE_knp, KEY_NPAGE}, 195 {TICODE_kpp, KEY_PPAGE}, 196 {TICODE_kri, KEY_SR}, 197 {TICODE_kcuf1, KEY_RIGHT}, 198 {TICODE_ked, KEY_EOS}, 199 {TICODE_khts, KEY_STAB}, 200 {TICODE_kctab, KEY_CTAB}, 201 {TICODE_kcuu1, KEY_UP} 202 }; 203 /* Number of TC entries .... */ 204 static const int num_tcs = (sizeof(tc) / sizeof(struct tcdata)); 205 206 int ESCDELAY; /* Delay in ms between keys for esc seq's */ 207 208 /* Key buffer */ 209 #define INBUF_SZ 16 /* size of key buffer - must be larger than 210 * longest multi-key sequence */ 211 static wchar_t inbuf[INBUF_SZ]; 212 static int start, end, working; /* pointers for manipulating inbuf data */ 213 214 /* prototypes for private functions */ 215 static void add_key_sequence(SCREEN *screen, char *sequence, int key_type); 216 static key_entry_t *add_new_key(keymap_t *current, char ch, int key_type, 217 int symbol); 218 static void delete_key_sequence(keymap_t *current, int key_type); 219 static void do_keyok(keymap_t *current, int key_type, bool set, bool flag, 220 int *retval); 221 static keymap_t *new_keymap(void); /* create a new keymap */ 222 static key_entry_t *new_key(void); /* create a new key entry */ 223 static wchar_t inkey(int to, int delay); 224 225 /* 226 * Free the storage associated with the given keymap 227 */ 228 void 229 _cursesi_free_keymap(keymap_t *map) 230 { 231 int i; 232 233 /* check for, and free, child keymaps */ 234 for (i = 0; i < MAX_CHAR; i++) { 235 if (map->mapping[i] >= 0) { 236 if (map->key[map->mapping[i]]->type == KEYMAP_MULTI) 237 _cursesi_free_keymap( 238 map->key[map->mapping[i]]->value.next); 239 } 240 } 241 242 /* now free any allocated keymap structs */ 243 for (i = 0; i < map->count; i += KEYMAP_ALLOC_CHUNK) { 244 free(map->key[i]); 245 } 246 247 free(map->key); 248 free(map); 249 } 250 251 252 /* 253 * Add a new key entry to the keymap pointed to by current. Entry 254 * contains the character to add to the keymap, type is the type of 255 * entry to add (either multikey or leaf) and symbol is the symbolic 256 * value for a leaf type entry. The function returns a pointer to the 257 * new keymap entry. 258 */ 259 static key_entry_t * 260 add_new_key(keymap_t *current, char chr, int key_type, int symbol) 261 { 262 key_entry_t *the_key; 263 int i, ki; 264 265 #ifdef DEBUG 266 __CTRACE(__CTRACE_MISC, 267 "Adding character %s of type %d, symbol 0x%x\n", 268 unctrl(chr), key_type, symbol); 269 #endif 270 if (current->mapping[(unsigned char) chr] < 0) { 271 if (current->mapping[(unsigned char) chr] == MAPPING_UNUSED) { 272 /* first time for this char */ 273 current->mapping[(unsigned char) chr] = 274 current->count; /* map new entry */ 275 ki = current->count; 276 277 /* make sure we have room in the key array first */ 278 if ((current->count & (KEYMAP_ALLOC_CHUNK - 1)) == 0) 279 { 280 if ((current->key = 281 realloc(current->key, 282 ki * sizeof(key_entry_t *) 283 + KEYMAP_ALLOC_CHUNK * sizeof(key_entry_t *))) == NULL) { 284 fprintf(stderr, 285 "Could not malloc for key entry\n"); 286 exit(1); 287 } 288 289 the_key = new_key(); 290 for (i = 0; i < KEYMAP_ALLOC_CHUNK; i++) { 291 current->key[ki + i] = &the_key[i]; 292 } 293 } 294 } else { 295 /* the mapping was used but freed, reuse it */ 296 ki = - current->mapping[(unsigned char) chr]; 297 current->mapping[(unsigned char) chr] = ki; 298 } 299 300 current->count++; 301 302 /* point at the current key array element to use */ 303 the_key = current->key[ki]; 304 305 the_key->type = key_type; 306 307 switch (key_type) { 308 case KEYMAP_MULTI: 309 /* need for next key */ 310 #ifdef DEBUG 311 __CTRACE(__CTRACE_MISC, "Creating new keymap\n"); 312 #endif 313 the_key->value.next = new_keymap(); 314 the_key->enable = TRUE; 315 break; 316 317 case KEYMAP_LEAF: 318 /* the associated symbol for the key */ 319 #ifdef DEBUG 320 __CTRACE(__CTRACE_MISC, "Adding leaf key\n"); 321 #endif 322 the_key->value.symbol = symbol; 323 the_key->enable = TRUE; 324 break; 325 326 default: 327 fprintf(stderr, "add_new_key: bad type passed\n"); 328 exit(1); 329 } 330 } else { 331 /* the key is already known - just return the address. */ 332 #ifdef DEBUG 333 __CTRACE(__CTRACE_MISC, "Keymap already known\n"); 334 #endif 335 the_key = current->key[current->mapping[(unsigned char) chr]]; 336 } 337 338 return the_key; 339 } 340 341 /* 342 * Delete the given key symbol from the key mappings for the screen. 343 * 344 */ 345 void 346 delete_key_sequence(keymap_t *current, int key_type) 347 { 348 key_entry_t *key; 349 int i; 350 351 /* 352 * we need to iterate over all the keys as there may be 353 * multiple instances of the leaf symbol. 354 */ 355 for (i = 0; i < MAX_CHAR; i++) { 356 if (current->mapping[i] < 0) 357 continue; /* no mapping for the key, next! */ 358 359 key = current->key[current->mapping[i]]; 360 361 if (key->type == KEYMAP_MULTI) { 362 /* have not found the leaf, recurse down */ 363 delete_key_sequence(key->value.next, key_type); 364 /* if we deleted the last key in the map, free */ 365 if (key->value.next->count == 0) 366 _cursesi_free_keymap(key->value.next); 367 } else if ((key->type == KEYMAP_LEAF) 368 && (key->value.symbol == key_type)) { 369 #ifdef DEBUG 370 __CTRACE(__CTRACE_INPUT, "delete_key_sequence: found keysym %d, deleting\n", 371 key_type); 372 #endif 373 key->enable = FALSE; 374 } 375 } 376 } 377 378 /* 379 * Add the sequence of characters given in sequence as the key mapping 380 * for the given key symbol. 381 */ 382 void 383 add_key_sequence(SCREEN *screen, char *sequence, int key_type) 384 { 385 key_entry_t *tmp_key; 386 keymap_t *current; 387 int length, j, key_ent; 388 389 #ifdef DEBUG 390 __CTRACE(__CTRACE_MISC, "add_key_sequence: add key sequence: %s(%s)\n", 391 sequence, keyname(key_type)); 392 #endif /* DEBUG */ 393 current = screen->base_keymap; /* always start with 394 * base keymap. */ 395 length = (int) strlen(sequence); 396 397 /* 398 * OK - we really should never get a zero length string here, either 399 * the terminfo entry is there and it has a value or we are not called 400 * at all. Unfortunately, if someone assigns a terminfo string to the 401 * ^@ value we get passed a null string which messes up our length. 402 * So, if we get a null string then just insert a leaf value in 403 * the 0th char position of the root keymap. Note that we are 404 * totally screwed if someone terminates a multichar sequence 405 * with ^@... oh well. 406 */ 407 if (length == 0) 408 length = 1; 409 410 for (j = 0; j < length - 1; j++) { 411 /* add the entry to the struct */ 412 tmp_key = add_new_key(current, sequence[j], KEYMAP_MULTI, 0); 413 414 /* index into the key array - it's 415 clearer if we stash this */ 416 key_ent = current->mapping[(unsigned char) sequence[j]]; 417 418 current->key[key_ent] = tmp_key; 419 420 /* next key uses this map... */ 421 current = current->key[key_ent]->value.next; 422 } 423 424 /* 425 * This is the last key in the sequence (it may have been the 426 * only one but that does not matter) this means it is a leaf 427 * key and should have a symbol associated with it. 428 */ 429 tmp_key = add_new_key(current, sequence[length - 1], KEYMAP_LEAF, 430 key_type); 431 current->key[current->mapping[(int)sequence[length - 1]]] = tmp_key; 432 } 433 434 /* 435 * Init_getch - initialise all the pointers & structures needed to make 436 * getch work in keypad mode. 437 * 438 */ 439 void 440 __init_getch(SCREEN *screen) 441 { 442 char entry[1024], *p; 443 const char *s; 444 int i; 445 size_t limit, l; 446 #ifdef DEBUG 447 int k, length; 448 #endif 449 450 /* init the inkey state variable */ 451 state = INKEY_NORM; 452 453 /* init the base keymap */ 454 screen->base_keymap = new_keymap(); 455 456 /* key input buffer pointers */ 457 start = end = working = 0; 458 459 /* now do the terminfo snarfing ... */ 460 461 for (i = 0; i < num_tcs; i++) { 462 p = entry; 463 limit = 1023; 464 s = screen->term->strs[tc[i].code]; 465 if (s == NULL) 466 continue; 467 l = strlen(s) + 1; 468 if (limit < l) 469 continue; 470 strlcpy(p, s, limit); 471 p += l; 472 limit -= l; 473 #ifdef DEBUG 474 __CTRACE(__CTRACE_INIT, 475 "Processing terminfo entry %d, sequence ", 476 tc[i].code); 477 length = (int) strlen(entry); 478 for (k = 0; k <= length -1; k++) 479 __CTRACE(__CTRACE_INIT, "%s", unctrl(entry[k])); 480 __CTRACE(__CTRACE_INIT, "\n"); 481 #endif 482 add_key_sequence(screen, entry, tc[i].symbol); 483 } 484 } 485 486 487 /* 488 * new_keymap - allocates & initialises a new keymap structure. This 489 * function returns a pointer to the new keymap. 490 * 491 */ 492 static keymap_t * 493 new_keymap(void) 494 { 495 int i; 496 keymap_t *new_map; 497 498 if ((new_map = malloc(sizeof(keymap_t))) == NULL) { 499 perror("Inkey: Cannot allocate new keymap"); 500 exit(2); 501 } 502 503 /* Initialise the new map */ 504 new_map->count = 0; 505 for (i = 0; i < MAX_CHAR; i++) { 506 new_map->mapping[i] = MAPPING_UNUSED; /* no mapping for char */ 507 } 508 509 /* key array will be allocated when first key is added */ 510 new_map->key = NULL; 511 512 return new_map; 513 } 514 515 /* 516 * new_key - allocates & initialises a new key entry. This function returns 517 * a pointer to the newly allocated key entry. 518 * 519 */ 520 static key_entry_t * 521 new_key(void) 522 { 523 key_entry_t *new_one; 524 int i; 525 526 if ((new_one = malloc(KEYMAP_ALLOC_CHUNK * sizeof(key_entry_t))) 527 == NULL) { 528 perror("inkey: Cannot allocate new key entry chunk"); 529 exit(2); 530 } 531 532 for (i = 0; i < KEYMAP_ALLOC_CHUNK; i++) { 533 new_one[i].type = 0; 534 new_one[i].value.next = NULL; 535 } 536 537 return new_one; 538 } 539 540 /* 541 * inkey - do the work to process keyboard input, check for multi-key 542 * sequences and return the appropriate symbol if we get a match. 543 * 544 */ 545 546 wchar_t 547 inkey(int to, int delay) 548 { 549 wchar_t k; 550 int c, mapping; 551 keymap_t *current = _cursesi_screen->base_keymap; 552 FILE *infd = _cursesi_screen->infd; 553 int escdelay = _cursesi_screen->ESCDELAY; 554 555 k = 0; /* XXX gcc -Wuninitialized */ 556 557 #ifdef DEBUG 558 __CTRACE(__CTRACE_INPUT, "inkey (%d, %d)\n", to, delay); 559 #endif 560 for (;;) { /* loop until we get a complete key sequence */ 561 reread: 562 if (state == INKEY_NORM) { 563 if (delay && __timeout(delay) == ERR) 564 return ERR; 565 c = fgetc(infd); 566 if (c == EOF) { 567 clearerr(infd); 568 return ERR; 569 } 570 571 if (delay && (__notimeout() == ERR)) 572 return ERR; 573 574 k = (wchar_t) c; 575 #ifdef DEBUG 576 __CTRACE(__CTRACE_INPUT, 577 "inkey (state normal) got '%s'\n", unctrl(k)); 578 #endif 579 580 working = start; 581 inbuf[working] = k; 582 INC_POINTER(working); 583 end = working; 584 state = INKEY_ASSEMBLING; /* go to the assembling 585 * state now */ 586 } else if (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 state = INKEY_ASSEMBLING; 595 } 596 } else if (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(infd); 608 if (ferror(infd)) { 609 clearerr(infd); 610 return ERR; 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 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 (((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 state = INKEY_NORM; 656 } else {/* otherwise we must have more than one char 657 * to backout */ 658 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 state = INKEY_NORM; 671 } else { 672 /* otherwise go to backout state */ 673 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 do_keyok(_cursesi_screen->base_keymap, key_type, true, flag, &result); 739 return result; 740 } 741 742 /* 743 * do_keyok -- 744 * Does the actual work for keyok, we need to recurse through the 745 * keymaps finding the passed key symbol. 746 */ 747 static void 748 do_keyok(keymap_t *current, int key_type, bool set, bool flag, int *retval) 749 { 750 key_entry_t *key; 751 int i; 752 753 /* 754 * we need to iterate over all the keys as there may be 755 * multiple instances of the leaf symbol. 756 */ 757 for (i = 0; i < MAX_CHAR; i++) { 758 if (current->mapping[i] < 0) 759 continue; /* no mapping for the key, next! */ 760 761 key = current->key[current->mapping[i]]; 762 763 if (key->type == KEYMAP_MULTI) 764 do_keyok(key->value.next, key_type, set, flag, retval); 765 else if ((key->type == KEYMAP_LEAF) 766 && (key->value.symbol == key_type)) { 767 if (set) 768 key->enable = flag; 769 *retval = OK; /* we found at least one instance, ok */ 770 } 771 } 772 } 773 774 /* 775 * define_key -- 776 * Add a custom mapping of a key sequence to key symbol. 777 * 778 */ 779 int 780 define_key(char *sequence, int symbol) 781 { 782 783 if (symbol <= 0) 784 return ERR; 785 786 if (sequence == NULL) { 787 #ifdef DEBUG 788 __CTRACE(__CTRACE_INPUT, "define_key: deleting keysym %d\n", 789 symbol); 790 #endif 791 delete_key_sequence(_cursesi_screen->base_keymap, symbol); 792 } else 793 add_key_sequence(_cursesi_screen, sequence, symbol); 794 795 return OK; 796 } 797 798 /* 799 * wgetch -- 800 * Read in a character from the window. 801 */ 802 int 803 wgetch(WINDOW *win) 804 { 805 int inp, weset; 806 int c; 807 FILE *infd = _cursesi_screen->infd; 808 809 #ifdef DEBUG 810 __CTRACE(__CTRACE_INPUT, "wgetch: win(%p)\n", win); 811 #endif 812 if (!(win->flags & __SCROLLOK) && (win->flags & __FULLWIN) 813 && win->curx == win->maxx - 1 && win->cury == win->maxy - 1 814 && __echoit) 815 return (ERR); 816 817 if (is_wintouched(win)) 818 wrefresh(win); 819 #ifdef DEBUG 820 __CTRACE(__CTRACE_INPUT, "wgetch: __echoit = %d, " 821 "__rawmode = %d, __nl = %d, flags = %#.4x, delay = %d\n", 822 __echoit, __rawmode, _cursesi_screen->nl, win->flags, win->delay); 823 #endif 824 if (_cursesi_screen->resized) { 825 _cursesi_screen->resized = 0; 826 #ifdef DEBUG 827 __CTRACE(__CTRACE_INPUT, "wgetch returning KEY_RESIZE\n"); 828 #endif 829 return KEY_RESIZE; 830 } 831 if (_cursesi_screen->unget_pos) { 832 #ifdef DEBUG 833 __CTRACE(__CTRACE_INPUT, "wgetch returning char at %d\n", 834 _cursesi_screen->unget_pos); 835 #endif 836 _cursesi_screen->unget_pos--; 837 c = _cursesi_screen->unget_list[_cursesi_screen->unget_pos]; 838 if (__echoit) 839 waddch(win, (chtype) c); 840 return c; 841 } 842 if (__echoit && !__rawmode) { 843 cbreak(); 844 weset = 1; 845 } else 846 weset = 0; 847 848 __save_termios(); 849 850 if (win->flags & __KEYPAD) { 851 switch (win->delay) 852 { 853 case -1: 854 inp = inkey (win->flags & __NOTIMEOUT ? 0 : 1, 0); 855 break; 856 case 0: 857 if (__nodelay() == ERR) 858 return ERR; 859 inp = inkey(0, 0); 860 break; 861 default: 862 inp = inkey(win->flags & __NOTIMEOUT ? 0 : 1, win->delay); 863 break; 864 } 865 } else { 866 switch (win->delay) 867 { 868 case -1: 869 if (__delay() == ERR) 870 return ERR; 871 break; 872 case 0: 873 if (__nodelay() == ERR) 874 return ERR; 875 break; 876 default: 877 if (__timeout(win->delay) == ERR) 878 return ERR; 879 break; 880 } 881 882 c = fgetc(infd); 883 if (feof(infd)) { 884 clearerr(infd); 885 __restore_termios(); 886 return ERR; /* we have timed out */ 887 } 888 889 if (ferror(infd)) { 890 clearerr(infd); 891 inp = ERR; 892 } else { 893 inp = c; 894 } 895 } 896 #ifdef DEBUG 897 if (inp > 255) 898 /* we have a key symbol - treat it differently */ 899 /* XXXX perhaps __unctrl should be expanded to include 900 * XXXX the keysyms in the table.... 901 */ 902 __CTRACE(__CTRACE_INPUT, "wgetch assembled keysym 0x%x\n", inp); 903 else 904 __CTRACE(__CTRACE_INPUT, "wgetch got '%s'\n", unctrl(inp)); 905 #endif 906 if (win->delay > -1) { 907 if (__delay() == ERR) 908 return ERR; 909 } 910 911 __restore_termios(); 912 913 if ((__echoit) && (inp < KEY_MIN)) 914 waddch(win, (chtype) inp); 915 916 if (weset) 917 nocbreak(); 918 919 if (_cursesi_screen->nl && inp == 13) 920 inp = 10; 921 922 return ((inp < 0) || (inp == ERR) ? ERR : inp); 923 } 924 925 /* 926 * ungetch -- 927 * Put the character back into the input queue. 928 */ 929 int 930 ungetch(int c) 931 { 932 return __unget((wint_t) c); 933 } 934 935 /* 936 * __unget -- 937 * Do the work for ungetch() and unget_wch(); 938 */ 939 int 940 __unget(wint_t c) 941 { 942 wchar_t *p; 943 int len; 944 945 #ifdef DEBUG 946 __CTRACE(__CTRACE_INPUT, "__unget(%x)\n", c); 947 #endif 948 if (_cursesi_screen->unget_pos >= _cursesi_screen->unget_len) { 949 len = _cursesi_screen->unget_len + 32; 950 if ((p = realloc(_cursesi_screen->unget_list, 951 sizeof(wchar_t) * len)) == NULL) { 952 /* Can't realloc(), so just lose the oldest entry */ 953 memmove(_cursesi_screen->unget_list, 954 _cursesi_screen->unget_list + sizeof(wchar_t), 955 _cursesi_screen->unget_len - 1); 956 _cursesi_screen->unget_list[_cursesi_screen->unget_len 957 - 1] = c; 958 _cursesi_screen->unget_pos = 959 _cursesi_screen->unget_len; 960 return OK; 961 } else { 962 _cursesi_screen->unget_pos = 963 _cursesi_screen->unget_len; 964 _cursesi_screen->unget_len = len; 965 _cursesi_screen->unget_list = p; 966 } 967 } 968 _cursesi_screen->unget_list[_cursesi_screen->unget_pos] = c; 969 _cursesi_screen->unget_pos++; 970 return OK; 971 } 972 973 int 974 has_key(int key_type) 975 { 976 int result = ERR; 977 978 do_keyok(_cursesi_screen->base_keymap, key_type, false, false, &result); 979 return result; 980 } 981 982 /* 983 * set_escdelay -- 984 * Sets the escape delay for the current screen. 985 */ 986 int 987 set_escdelay(int escdelay) 988 { 989 990 _cursesi_screen->ESCDELAY = escdelay; 991 ESCDELAY = escdelay; 992 return OK; 993 } 994
Indexes created Thu Sep 25 16:09:42 GMT 2025