getch.c revision 1.48
1 /* $NetBSD: getch.c,v 1.48 2007/05/28 15:01:55 blymn 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 1.48 2007/05/28 15:01:55 blymn 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 {"!1", KEY_SSAVE}, 53 {"!2", KEY_SSUSPEND}, 54 {"!3", KEY_SUNDO}, 55 {"#1", KEY_SHELP}, 56 {"#2", KEY_SHOME}, 57 {"#3", KEY_SIC}, 58 {"#4", KEY_SLEFT}, 59 {"%0", KEY_REDO}, 60 {"%1", KEY_HELP}, 61 {"%2", KEY_MARK}, 62 {"%3", KEY_MESSAGE}, 63 {"%4", KEY_MOVE}, 64 {"%5", KEY_NEXT}, 65 {"%6", KEY_OPEN}, 66 {"%7", KEY_OPTIONS}, 67 {"%8", KEY_PREVIOUS}, 68 {"%9", KEY_PRINT}, 69 {"%a", KEY_SMESSAGE}, 70 {"%b", KEY_SMOVE}, 71 {"%c", KEY_SNEXT}, 72 {"%d", KEY_SOPTIONS}, 73 {"%e", KEY_SPREVIOUS}, 74 {"%f", KEY_SPRINT}, 75 {"%g", KEY_SREDO}, 76 {"%h", KEY_SREPLACE}, 77 {"%i", KEY_SRIGHT}, 78 {"%j", KEY_SRSUME}, 79 {"&0", KEY_SCANCEL}, 80 {"&1", KEY_REFERENCE}, 81 {"&2", KEY_REFRESH}, 82 {"&3", KEY_REPLACE}, 83 {"&4", KEY_RESTART}, 84 {"&5", KEY_RESUME}, 85 {"&6", KEY_SAVE}, 86 {"&7", KEY_SUSPEND}, 87 {"&8", KEY_UNDO}, 88 {"&9", KEY_SBEG}, 89 {"*0", KEY_SFIND}, 90 {"*1", KEY_SCOMMAND}, 91 {"*2", KEY_SCOPY}, 92 {"*3", KEY_SCREATE}, 93 {"*4", KEY_SDC}, 94 {"*5", KEY_SDL}, 95 {"*6", KEY_SELECT}, 96 {"*7", KEY_SEND}, 97 {"*8", KEY_SEOL}, 98 {"*9", KEY_SEXIT}, 99 {"@0", KEY_FIND}, 100 {"@1", KEY_BEG}, 101 {"@2", KEY_CANCEL}, 102 {"@3", KEY_CLOSE}, 103 {"@4", KEY_COMMAND}, 104 {"@5", KEY_COPY}, 105 {"@6", KEY_CREATE}, 106 {"@7", KEY_END}, 107 {"@8", KEY_ENTER}, 108 {"@9", KEY_EXIT}, 109 {"F1", KEY_F(11)}, 110 {"F2", KEY_F(12)}, 111 {"F3", KEY_F(13)}, 112 {"F4", KEY_F(14)}, 113 {"F5", KEY_F(15)}, 114 {"F6", KEY_F(16)}, 115 {"F7", KEY_F(17)}, 116 {"F8", KEY_F(18)}, 117 {"F9", KEY_F(19)}, 118 {"FA", KEY_F(20)}, 119 {"FB", KEY_F(21)}, 120 {"FC", KEY_F(22)}, 121 {"FD", KEY_F(23)}, 122 {"FE", KEY_F(24)}, 123 {"FF", KEY_F(25)}, 124 {"FG", KEY_F(26)}, 125 {"FH", KEY_F(27)}, 126 {"FI", KEY_F(28)}, 127 {"FJ", KEY_F(29)}, 128 {"FK", KEY_F(30)}, 129 {"FL", KEY_F(31)}, 130 {"FM", KEY_F(32)}, 131 {"FN", KEY_F(33)}, 132 {"FO", KEY_F(34)}, 133 {"FP", KEY_F(35)}, 134 {"FQ", KEY_F(36)}, 135 {"FR", KEY_F(37)}, 136 {"FS", KEY_F(38)}, 137 {"FT", KEY_F(39)}, 138 {"FU", KEY_F(40)}, 139 {"FV", KEY_F(41)}, 140 {"FW", KEY_F(42)}, 141 {"FX", KEY_F(43)}, 142 {"FY", KEY_F(44)}, 143 {"FZ", KEY_F(45)}, 144 {"Fa", KEY_F(46)}, 145 {"Fb", KEY_F(47)}, 146 {"Fc", KEY_F(48)}, 147 {"Fd", KEY_F(49)}, 148 {"Fe", KEY_F(50)}, 149 {"Ff", KEY_F(51)}, 150 {"Fg", KEY_F(52)}, 151 {"Fh", KEY_F(53)}, 152 {"Fi", KEY_F(54)}, 153 {"Fj", KEY_F(55)}, 154 {"Fk", KEY_F(56)}, 155 {"Fl", KEY_F(57)}, 156 {"Fm", KEY_F(58)}, 157 {"Fn", KEY_F(59)}, 158 {"Fo", KEY_F(60)}, 159 {"Fp", KEY_F(61)}, 160 {"Fq", KEY_F(62)}, 161 {"Fr", KEY_F(63)}, 162 {"K1", KEY_A1}, 163 {"K2", KEY_B2}, 164 {"K3", KEY_A3}, 165 {"K4", KEY_C1}, 166 {"K5", KEY_C3}, 167 {"Km", KEY_MOUSE}, 168 {"k0", KEY_F0}, 169 {"k1", KEY_F(1)}, 170 {"k2", KEY_F(2)}, 171 {"k3", KEY_F(3)}, 172 {"k4", KEY_F(4)}, 173 {"k5", KEY_F(5)}, 174 {"k6", KEY_F(6)}, 175 {"k7", KEY_F(7)}, 176 {"k8", KEY_F(8)}, 177 {"k9", KEY_F(9)}, 178 {"k;", KEY_F(10)}, 179 {"kA", KEY_IL}, 180 {"ka", KEY_CATAB}, 181 {"kB", KEY_BTAB}, 182 {"kb", KEY_BACKSPACE}, 183 {"kC", KEY_CLEAR}, 184 {"kD", KEY_DC}, 185 {"kd", KEY_DOWN}, 186 {"kE", KEY_EOL}, 187 {"kF", KEY_SF}, 188 {"kH", KEY_LL}, 189 {"kh", KEY_HOME}, 190 {"kI", KEY_IC}, 191 {"kL", KEY_DL}, 192 {"kl", KEY_LEFT}, 193 {"kM", KEY_EIC}, 194 {"kN", KEY_NPAGE}, 195 {"kP", KEY_PPAGE}, 196 {"kR", KEY_SR}, 197 {"kr", KEY_RIGHT}, 198 {"kS", KEY_EOS}, 199 {"kT", KEY_STAB}, 200 {"kt", KEY_CTAB}, 201 {"ku", KEY_UP} 202 }; 203 /* Number of TC entries .... */ 204 static const int num_tcs = (sizeof(tc) / sizeof(struct tcdata)); 205 206 int ESCDELAY = 300; /* 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 flag, 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 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 /* 369 * delete the mapping by negating the current 370 * index - this "holds" the position in the 371 * allocation just in case we later re-add 372 * the key for that mapping. 373 */ 374 current->mapping[i] = - current->mapping[i]; 375 current->count--; 376 } 377 } 378 } 379 380 /* 381 * Add the sequence of characters given in sequence as the key mapping 382 * for the given key symbol. 383 */ 384 void 385 add_key_sequence(SCREEN *screen, char *sequence, int key_type) 386 { 387 key_entry_t *tmp_key; 388 keymap_t *current; 389 int length, j, key_ent; 390 391 #ifdef DEBUG 392 __CTRACE(__CTRACE_MISC, "add_key_sequence: add key sequence: %s(%s)\n", 393 sequence, keyname(key_type)); 394 #endif /* DEBUG */ 395 current = screen->base_keymap; /* always start with 396 * base keymap. */ 397 length = (int) strlen(sequence); 398 399 for (j = 0; j < length - 1; j++) { 400 /* add the entry to the struct */ 401 tmp_key = add_new_key(current, sequence[j], KEYMAP_MULTI, 0); 402 403 /* index into the key array - it's 404 clearer if we stash this */ 405 key_ent = current->mapping[(unsigned char) sequence[j]]; 406 407 current->key[key_ent] = tmp_key; 408 409 /* next key uses this map... */ 410 current = current->key[key_ent]->value.next; 411 } 412 413 /* 414 * This is the last key in the sequence (it may have been the 415 * only one but that does not matter) this means it is a leaf 416 * key and should have a symbol associated with it. 417 */ 418 tmp_key = add_new_key(current, sequence[length - 1], KEYMAP_LEAF, 419 key_type); 420 current->key[current->mapping[(int)sequence[length - 1]]] = tmp_key; 421 } 422 423 /* 424 * Init_getch - initialise all the pointers & structures needed to make 425 * getch work in keypad mode. 426 * 427 */ 428 void 429 __init_getch(SCREEN *screen) 430 { 431 char entry[1024], *p; 432 int i; 433 size_t limit; 434 #ifdef DEBUG 435 int k, length; 436 #endif 437 438 /* init the inkey state variable */ 439 state = INKEY_NORM; 440 441 /* init the base keymap */ 442 screen->base_keymap = new_keymap(); 443 444 /* key input buffer pointers */ 445 start = end = working = 0; 446 447 /* now do the termcap snarfing ... */ 448 449 for (i = 0; i < num_tcs; i++) { 450 p = entry; 451 limit = 1023; 452 if (t_getstr(screen->cursesi_genbuf, tc[i].name, 453 &p, &limit) != (char *) NULL) { 454 #ifdef DEBUG 455 __CTRACE(__CTRACE_INIT, 456 "Processing termcap entry %s, sequence ", 457 tc[i].name); 458 length = (int) strlen(entry); 459 for (k = 0; k <= length -1; k++) 460 __CTRACE(__CTRACE_INIT, "%s", unctrl(entry[k])); 461 __CTRACE(__CTRACE_INIT, "\n"); 462 #endif 463 add_key_sequence(screen, entry, tc[i].symbol); 464 } 465 466 } 467 } 468 469 470 /* 471 * new_keymap - allocates & initialises a new keymap structure. This 472 * function returns a pointer to the new keymap. 473 * 474 */ 475 static keymap_t * 476 new_keymap(void) 477 { 478 int i; 479 keymap_t *new_map; 480 481 if ((new_map = malloc(sizeof(keymap_t))) == NULL) { 482 perror("Inkey: Cannot allocate new keymap"); 483 exit(2); 484 } 485 486 /* Initialise the new map */ 487 new_map->count = 0; 488 for (i = 0; i < MAX_CHAR; i++) { 489 new_map->mapping[i] = MAPPING_UNUSED; /* no mapping for char */ 490 } 491 492 /* key array will be allocated when first key is added */ 493 new_map->key = NULL; 494 495 return new_map; 496 } 497 498 /* 499 * new_key - allocates & initialises a new key entry. This function returns 500 * a pointer to the newly allocated key entry. 501 * 502 */ 503 static key_entry_t * 504 new_key(void) 505 { 506 key_entry_t *new_one; 507 int i; 508 509 if ((new_one = malloc(KEYMAP_ALLOC_CHUNK * sizeof(key_entry_t))) 510 == NULL) { 511 perror("inkey: Cannot allocate new key entry chunk"); 512 exit(2); 513 } 514 515 for (i = 0; i < KEYMAP_ALLOC_CHUNK; i++) { 516 new_one[i].type = 0; 517 new_one[i].value.next = NULL; 518 } 519 520 return new_one; 521 } 522 523 /* 524 * inkey - do the work to process keyboard input, check for multi-key 525 * sequences and return the appropriate symbol if we get a match. 526 * 527 */ 528 529 wchar_t 530 inkey(int to, int delay) 531 { 532 wchar_t k; 533 int c, mapping; 534 keymap_t *current = _cursesi_screen->base_keymap; 535 FILE *infd = _cursesi_screen->infd; 536 537 k = 0; /* XXX gcc -Wuninitialized */ 538 539 #ifdef DEBUG 540 __CTRACE(__CTRACE_INPUT, "inkey (%d, %d)\n", to, delay); 541 #endif 542 for (;;) { /* loop until we get a complete key sequence */ 543 reread: 544 if (state == INKEY_NORM) { 545 if (delay && __timeout(delay) == ERR) 546 return ERR; 547 c = getchar(); 548 if (_cursesi_screen->resized) { 549 if (c != -1) 550 ungetch(c); 551 _cursesi_screen->resized = 0; 552 clearerr(infd); 553 return KEY_RESIZE; 554 } 555 if (c == EOF) { 556 clearerr(infd); 557 return ERR; 558 } 559 560 if (delay && (__notimeout() == ERR)) 561 return ERR; 562 563 k = (wchar_t) c; 564 #ifdef DEBUG 565 __CTRACE(__CTRACE_INPUT, 566 "inkey (state normal) got '%s'\n", unctrl(k)); 567 #endif 568 569 working = start; 570 inbuf[working] = k; 571 INC_POINTER(working); 572 end = working; 573 state = INKEY_ASSEMBLING; /* go to the assembling 574 * state now */ 575 } else if (state == INKEY_BACKOUT) { 576 k = inbuf[working]; 577 INC_POINTER(working); 578 if (working == end) { /* see if we have run 579 * out of keys in the 580 * backlog */ 581 582 /* if we have then switch to assembling */ 583 state = INKEY_ASSEMBLING; 584 } 585 } else if (state == INKEY_ASSEMBLING) { 586 /* assembling a key sequence */ 587 if (delay) { 588 if (__timeout(to ? (ESCDELAY / 100) : delay) 589 == ERR) 590 return ERR; 591 } else { 592 if (to && (__timeout(ESCDELAY / 100) == ERR)) 593 return ERR; 594 } 595 596 c = getchar(); 597 if (_cursesi_screen->resized) { 598 if (c != -1) 599 ungetch(c); 600 _cursesi_screen->resized = 0; 601 clearerr(infd); 602 return KEY_RESIZE; 603 } 604 if (c == -1 || ferror(infd)) { 605 clearerr(infd); 606 return ERR; 607 } 608 609 if ((to || delay) && (__notimeout() == ERR)) 610 return ERR; 611 612 k = (wchar_t) c; 613 #ifdef DEBUG 614 __CTRACE(__CTRACE_INPUT, 615 "inkey (state assembling) got '%s'\n", unctrl(k)); 616 #endif 617 if (feof(infd)) { /* inter-char timeout, 618 * start backing out */ 619 clearerr(infd); 620 if (start == end) 621 /* no chars in the buffer, restart */ 622 goto reread; 623 624 k = inbuf[start]; 625 state = INKEY_TIMEOUT; 626 } else { 627 inbuf[working] = k; 628 INC_POINTER(working); 629 end = working; 630 } 631 } else { 632 fprintf(stderr, "Inkey state screwed - exiting!!!"); 633 exit(2); 634 } 635 636 /* 637 * Check key has no special meaning and we have not 638 * timed out and the key has not been disabled 639 */ 640 mapping = current->mapping[k]; 641 if (((state == INKEY_TIMEOUT) || (mapping < 0)) 642 || ((current->key[mapping]->type == KEYMAP_LEAF) 643 && (current->key[mapping]->enable == FALSE))) { 644 /* return the first key we know about */ 645 k = inbuf[start]; 646 647 INC_POINTER(start); 648 working = start; 649 650 if (start == end) { /* only one char processed */ 651 state = INKEY_NORM; 652 } else {/* otherwise we must have more than one char 653 * to backout */ 654 state = INKEY_BACKOUT; 655 } 656 return k; 657 } else { /* must be part of a multikey sequence */ 658 /* check for completed key sequence */ 659 if (current->key[current->mapping[k]]->type == KEYMAP_LEAF) { 660 start = working; /* eat the key sequence 661 * in inbuf */ 662 663 /* check if inbuf empty now */ 664 if (start == end) { 665 /* if it is go back to normal */ 666 state = INKEY_NORM; 667 } else { 668 /* otherwise go to backout state */ 669 state = INKEY_BACKOUT; 670 } 671 672 /* return the symbol */ 673 return current->key[current->mapping[k]]->value.symbol; 674 675 } else { 676 /* 677 * Step on to next part of the multi-key 678 * sequence. 679 */ 680 current = current->key[current->mapping[k]]->value.next; 681 } 682 } 683 } 684 } 685 686 #ifndef _CURSES_USE_MACROS 687 /* 688 * getch -- 689 * Read in a character from stdscr. 690 */ 691 int 692 getch(void) 693 { 694 return wgetch(stdscr); 695 } 696 697 /* 698 * mvgetch -- 699 * Read in a character from stdscr at the given location. 700 */ 701 int 702 mvgetch(int y, int x) 703 { 704 return mvwgetch(stdscr, y, x); 705 } 706 707 /* 708 * mvwgetch -- 709 * Read in a character from stdscr at the given location in the 710 * given window. 711 */ 712 int 713 mvwgetch(WINDOW *win, int y, int x) 714 { 715 if (wmove(win, y, x) == ERR) 716 return ERR; 717 718 return wgetch(win); 719 } 720 721 #endif 722 723 /* 724 * keyok -- 725 * Set the enable flag for a keysym, if the flag is false then 726 * getch will not return this keysym even if the matching key sequence 727 * is seen. 728 */ 729 int 730 keyok(int key_type, bool flag) 731 { 732 int result = ERR; 733 734 do_keyok(_cursesi_screen->base_keymap, key_type, flag, &result); 735 return result; 736 } 737 738 /* 739 * do_keyok -- 740 * Does the actual work for keyok, we need to recurse through the 741 * keymaps finding the passed key symbol. 742 */ 743 void 744 do_keyok(keymap_t *current, int key_type, bool flag, int *retval) 745 { 746 key_entry_t *key; 747 int i; 748 749 /* 750 * we need to iterate over all the keys as there may be 751 * multiple instances of the leaf symbol. 752 */ 753 for (i = 0; i < MAX_CHAR; i++) { 754 if (current->mapping[i] < 0) 755 continue; /* no mapping for the key, next! */ 756 757 key = current->key[current->mapping[i]]; 758 759 if (key->type == KEYMAP_MULTI) 760 do_keyok(key->value.next, key_type, flag, retval); 761 else if ((key->type == KEYMAP_LEAF) 762 && (key->value.symbol == key_type)) { 763 key->enable = flag; 764 *retval = OK; /* we found at least one instance, ok */ 765 } 766 } 767 } 768 769 /* 770 * define_key -- 771 * Add a custom mapping of a key sequence to key symbol. 772 * 773 */ 774 int 775 define_key(char *sequence, int symbol) 776 { 777 778 if (symbol <= 0) 779 return ERR; 780 781 if (sequence == NULL) 782 delete_key_sequence(_cursesi_screen->base_keymap, symbol); 783 else 784 add_key_sequence(_cursesi_screen, sequence, symbol); 785 786 return OK; 787 } 788 789 /* 790 * wgetch -- 791 * Read in a character from the window. 792 */ 793 int 794 wgetch(WINDOW *win) 795 { 796 int inp, weset; 797 int c; 798 FILE *infd = _cursesi_screen->infd; 799 800 if (!(win->flags & __SCROLLOK) && (win->flags & __FULLWIN) 801 && win->curx == win->maxx - 1 && win->cury == win->maxy - 1 802 && __echoit) 803 return (ERR); 804 805 if (is_wintouched(win)) 806 wrefresh(win); 807 #ifdef DEBUG 808 __CTRACE(__CTRACE_INPUT, "wgetch: __echoit = %d, " 809 "__rawmode = %d, __nl = %d, flags = %#.4x\n", 810 __echoit, __rawmode, _cursesi_screen->nl, win->flags); 811 #endif 812 if (__echoit && !__rawmode) { 813 cbreak(); 814 weset = 1; 815 } else 816 weset = 0; 817 818 __save_termios(); 819 820 if (win->flags & __KEYPAD) { 821 switch (win->delay) 822 { 823 case -1: 824 inp = inkey (win->flags & __NOTIMEOUT ? 0 : 1, 0); 825 break; 826 case 0: 827 if (__nodelay() == ERR) { 828 __restore_termios(); 829 return ERR; 830 } 831 inp = inkey(0, 0); 832 break; 833 default: 834 inp = inkey(win->flags & __NOTIMEOUT ? 0 : 1, win->delay); 835 break; 836 } 837 } else { 838 switch (win->delay) 839 { 840 case -1: 841 if (__delay() == ERR) { 842 __restore_termios(); 843 return ERR; 844 } 845 break; 846 case 0: 847 if (__nodelay() == ERR) { 848 __restore_termios(); 849 return ERR; 850 } 851 break; 852 default: 853 if (__timeout(win->delay) == ERR) { 854 __restore_termios(); 855 return ERR; 856 } 857 break; 858 } 859 860 c = getchar(); 861 if (_cursesi_screen->resized) { 862 if (c != -1) 863 ungetch(c); 864 _cursesi_screen->resized = 0; 865 clearerr(infd); 866 __restore_termios(); 867 return KEY_RESIZE; 868 } 869 if (feof(infd)) { 870 clearerr(infd); 871 __restore_termios(); 872 return ERR; /* we have timed out */ 873 } 874 875 if (ferror(infd)) { 876 clearerr(infd); 877 inp = ERR; 878 } else { 879 inp = c; 880 } 881 } 882 #ifdef DEBUG 883 if (inp > 255) 884 /* we have a key symbol - treat it differently */ 885 /* XXXX perhaps __unctrl should be expanded to include 886 * XXXX the keysyms in the table.... 887 */ 888 __CTRACE(__CTRACE_INPUT, "wgetch assembled keysym 0x%x\n", inp); 889 else 890 __CTRACE(__CTRACE_INPUT, "wgetch got '%s'\n", unctrl(inp)); 891 #endif 892 if (win->delay > -1) { 893 if (__delay() == ERR) { 894 __restore_termios(); 895 return ERR; 896 } 897 } 898 899 __restore_termios(); 900 901 if (__echoit) 902 waddch(win, (chtype) inp); 903 904 if (weset) 905 nocbreak(); 906 907 if (_cursesi_screen->nl && inp == 13) 908 inp = 10; 909 910 return ((inp < 0) || (inp == ERR) ? ERR : inp); 911 } 912 913 /* 914 * ungetch -- 915 * Put the character back into the input queue. 916 */ 917 int 918 ungetch(int c) 919 { 920 return ((ungetc(c, _cursesi_screen->infd) == EOF) ? ERR : OK); 921 } 922
Indexes created Thu Sep 25 08:09:54 GMT 2025