get_wch.c revision 1.11
1 /* $NetBSD: get_wch.c,v 1.11 2017/01/05 20:31:37 roy Exp $ */ 2 3 /* 4 * Copyright (c) 2005 The NetBSD Foundation Inc. 5 * All rights reserved. 6 * 7 * This code is derived from code donated to the NetBSD Foundation 8 * by Ruibiao Qiu <ruibiao (at) arl.wustl.edu,ruibiao (at) gmail.com>. 9 * 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 NetBSD Foundation nor the names of its 20 * contributors may be used to endorse or promote products derived 21 * from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND 24 * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 25 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 26 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #include <sys/cdefs.h> 38 #ifndef lint 39 __RCSID("$NetBSD: get_wch.c,v 1.11 2017/01/05 20:31:37 roy Exp $"); 40 #endif /* not lint */ 41 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 #ifdef HAVE_WCHAR 51 static short wstate; /* state of the wcinkey function */ 52 #endif /* HAVE_WCHAR */ 53 extern short state; /* storage declared in getch.c */ 54 55 /* prototypes for private functions */ 56 #ifdef HAVE_WCHAR 57 static int inkey(wchar_t *wc, int to, int delay); 58 #endif /* HAVE_WCHAR */ 59 60 #ifdef HAVE_WCHAR 61 /* 62 * __init_get_wch - initialise all the pointers & structures needed to make 63 * get_wch work in keypad mode. 64 * 65 */ 66 void 67 __init_get_wch(SCREEN *screen) 68 { 69 wstate = INKEY_NORM; 70 memset( &screen->cbuf, 0, sizeof(screen->cbuf)); 71 screen->cbuf_head = screen->cbuf_tail = screen->cbuf_cur = 0; 72 } 73 #endif /* HAVE_WCHAR */ 74 75 76 #ifdef HAVE_WCHAR 77 /* 78 * inkey - do the work to process keyboard input, check for multi-key 79 * sequences and return the appropriate symbol if we get a match. 80 * 81 */ 82 static int 83 inkey(wchar_t *wc, int to, int delay) 84 { 85 wchar_t k = 0; 86 int c, mapping, ret = 0; 87 size_t mlen = 0; 88 keymap_t *current = _cursesi_screen->base_keymap; 89 FILE *infd = _cursesi_screen->infd; 90 int *start = &_cursesi_screen->cbuf_head, 91 *working = &_cursesi_screen->cbuf_cur, 92 *end = &_cursesi_screen->cbuf_tail; 93 char *inbuf = &_cursesi_screen->cbuf[ 0 ]; 94 int escdelay = _cursesi_screen->ESCDELAY; 95 96 #ifdef DEBUG 97 __CTRACE(__CTRACE_INPUT, "inkey (%p, %d, %d)\n", wc, to, delay); 98 #endif 99 for (;;) { /* loop until we get a complete key sequence */ 100 if (wstate == INKEY_NORM) { 101 if (delay && __timeout(delay) == ERR) 102 return ERR; 103 c = fgetc(infd); 104 if (c == WEOF) { 105 clearerr(infd); 106 return ERR; 107 } 108 109 if (delay && (__notimeout() == ERR)) 110 return ERR; 111 112 k = (wchar_t) c; 113 #ifdef DEBUG 114 __CTRACE(__CTRACE_INPUT, 115 "inkey (wstate normal) got '%s'\n", unctrl(k)); 116 #endif 117 118 inbuf[ *end ] = k; 119 *end = ( *end + 1 ) % MAX_CBUF_SIZE; 120 *working = *start; 121 wstate = INKEY_ASSEMBLING; /* go to assembling state */ 122 #ifdef DEBUG 123 __CTRACE(__CTRACE_INPUT, 124 "inkey: NORM=>ASSEMBLING: start(%d), " 125 "current(%d), end(%d)\n", *start, *working, *end); 126 #endif /* DEBUG */ 127 } else if (wstate == INKEY_BACKOUT) { 128 k = inbuf[*working]; 129 *working = ( *working + 1 ) % MAX_CBUF_SIZE; 130 if (*working == *end) { /* see if run out of keys */ 131 /* if so, switch to assembling */ 132 wstate = INKEY_ASSEMBLING; 133 #ifdef DEBUG 134 __CTRACE(__CTRACE_INPUT, 135 "inkey: BACKOUT=>ASSEMBLING, start(%d), " 136 "current(%d), end(%d)\n", 137 *start, *working, *end); 138 #endif /* DEBUG */ 139 } 140 } else if (wstate == INKEY_ASSEMBLING) { 141 /* assembling a key sequence */ 142 if (delay) { 143 if (__timeout(to ? (escdelay / 100) : delay) 144 == ERR) 145 return ERR; 146 } else { 147 if (to && (__timeout(escdelay / 100) == ERR)) 148 return ERR; 149 } 150 151 c = fgetc(infd); 152 if (ferror(infd)) { 153 clearerr(infd); 154 return ERR; 155 } 156 157 if ((to || delay) && (__notimeout() == ERR)) 158 return ERR; 159 160 k = (wchar_t) c; 161 #ifdef DEBUG 162 __CTRACE(__CTRACE_INPUT, 163 "inkey (wstate assembling) got '%s'\n", unctrl(k)); 164 #endif /* DEBUG */ 165 if (feof(infd)) { /* inter-char T/O, start backout */ 166 clearerr(infd); 167 if (*start == *end) 168 /* no chars in the buffer, restart */ 169 continue; 170 171 k = inbuf[*start]; 172 wstate = INKEY_TIMEOUT; 173 #ifdef DEBUG 174 __CTRACE(__CTRACE_INPUT, 175 "inkey: ASSEMBLING=>TIMEOUT, start(%d), " 176 "current(%d), end(%d)\n", 177 *start, *working, *end); 178 #endif /* DEBUG */ 179 } else { 180 inbuf[ *end ] = k; 181 *working = *end; 182 *end = ( *end + 1 ) % MAX_CBUF_SIZE; 183 #ifdef DEBUG 184 __CTRACE(__CTRACE_INPUT, 185 "inkey: ASSEMBLING: start(%d), " 186 "current(%d), end(%d)", 187 *start, *working, *end); 188 #endif /* DEBUG */ 189 } 190 } else if (wstate == INKEY_WCASSEMBLING) { 191 /* assembling a wide-char sequence */ 192 if (delay) { 193 if (__timeout(to ? (escdelay / 100) : delay) 194 == ERR) 195 return ERR; 196 } else { 197 if (to && (__timeout(escdelay / 100) == ERR)) 198 return ERR; 199 } 200 201 c = fgetc(infd); 202 if (ferror(infd)) { 203 clearerr(infd); 204 return ERR; 205 } 206 207 if ((to || delay) && (__notimeout() == ERR)) 208 return ERR; 209 210 k = (wchar_t) c; 211 #ifdef DEBUG 212 __CTRACE(__CTRACE_INPUT, 213 "inkey (wstate wcassembling) got '%s'\n", 214 unctrl(k)); 215 #endif 216 if (feof(infd)) { /* inter-char T/O, start backout */ 217 clearerr(infd); 218 if (*start == *end) 219 /* no chars in the buffer, restart */ 220 continue; 221 222 *wc = inbuf[*start]; 223 *working = *start 224 = ( *start + 1 ) % MAX_CBUF_SIZE; 225 if (*start == *end) { 226 state = wstate = INKEY_NORM; 227 #ifdef DEBUG 228 __CTRACE(__CTRACE_INPUT, 229 "inkey: WCASSEMBLING=>NORM, " 230 "start(%d), current(%d), end(%d)", 231 *start, *working, *end); 232 #endif /* DEBUG */ 233 } else { 234 state = wstate = INKEY_BACKOUT; 235 #ifdef DEBUG 236 __CTRACE(__CTRACE_INPUT, 237 "inkey: WCASSEMBLING=>BACKOUT, " 238 "start(%d), current(%d), end(%d)", 239 *start, *working, *end); 240 #endif /* DEBUG */ 241 } 242 return OK; 243 } else { 244 /* assembling wide characters */ 245 inbuf[ *end ] = k; 246 *working = *end; 247 *end = ( *end + 1 ) % MAX_CBUF_SIZE; 248 #ifdef DEBUG 249 __CTRACE(__CTRACE_INPUT, 250 "inkey: WCASSEMBLING[head(%d), " 251 "urrent(%d), tail(%d)]\n", 252 *start, *working, *end); 253 #endif /* DEBUG */ 254 ret = (int) mbrtowc( wc, inbuf + (*working), 1, 255 &_cursesi_screen->sp ); 256 #ifdef DEBUG 257 __CTRACE(__CTRACE_INPUT, 258 "inkey: mbrtowc returns %d, wc(%x)\n", 259 ret, *wc ); 260 #endif /* DEBUG */ 261 if ( ret == -2 ) { 262 *working = (*working + 1) 263 % MAX_CBUF_SIZE; 264 continue; 265 } 266 if ( ret == 0 ) 267 ret = 1; 268 if ( ret == -1 ) { 269 /* return the 1st character we know */ 270 *wc = inbuf[ *start ]; 271 *working = *start = ( *start + 1 ) % MAX_CBUF_SIZE; 272 #ifdef DEBUG 273 __CTRACE(__CTRACE_INPUT, 274 "inkey: Invalid wide char(%x) " 275 "[head(%d), current(%d), " 276 "tail(%d)]\n", 277 *wc, *start, *working, *end); 278 #endif /* DEBUG */ 279 } else { /* > 0 */ 280 /* return the wide character */ 281 *start = *working 282 = (*working + ret)%MAX_CBUF_SIZE; 283 #ifdef DEBUG 284 __CTRACE(__CTRACE_INPUT, 285 "inkey: Wide char found(%x) " 286 "[head(%d), current(%d), " 287 "tail(%d)]\n", 288 *wc, *start, *working, *end); 289 #endif /* DEBUG */ 290 } 291 292 if (*start == *end) { /* only one char processed */ 293 state = wstate = INKEY_NORM; 294 #ifdef DEBUG 295 __CTRACE(__CTRACE_INPUT, 296 "inkey: WCASSEMBLING=>NORM, " 297 "start(%d), current(%d), end(%d)", 298 *start, *working, *end); 299 #endif /* DEBUG */ 300 } else { 301 /* otherwise we must have more than one char to backout */ 302 state = wstate = INKEY_BACKOUT; 303 #ifdef DEBUG 304 __CTRACE(__CTRACE_INPUT, 305 "inkey: WCASSEMBLING=>BACKOUT, " 306 "start(%d), current(%d), end(%d)", 307 *start, *working, *end); 308 #endif /* DEBUG */ 309 } 310 return OK; 311 } 312 } else { 313 fprintf(stderr, "Inkey wstate screwed - exiting!!!"); 314 exit(2); 315 } 316 317 /* 318 * Check key has no special meaning and we have not 319 * timed out and the key has not been disabled 320 */ 321 mapping = current->mapping[k]; 322 if (((wstate == INKEY_TIMEOUT) || (mapping < 0)) 323 || ((current->key[mapping]->type 324 == KEYMAP_LEAF) 325 && (current->key[mapping]->enable == FALSE))) { 326 /* wide-character specific code */ 327 #ifdef DEBUG 328 __CTRACE(__CTRACE_INPUT, 329 "inkey: Checking for wide char\n"); 330 #endif /* DEBUG */ 331 mbrtowc( NULL, NULL, 1, &_cursesi_screen->sp ); 332 *working = *start; 333 mlen = *end > *working ? 334 *end - *working : MAX_CBUF_SIZE - *working; 335 if ( !mlen ) 336 return ERR; 337 #ifdef DEBUG 338 __CTRACE(__CTRACE_INPUT, 339 "inkey: Check wide char[head(%d), " 340 "current(%d), tail(%d), mlen(%ld)]\n", 341 *start, *working, *end, (long) mlen); 342 #endif /* DEBUG */ 343 ret = (int) mbrtowc( wc, inbuf + (*working), mlen, 344 &_cursesi_screen->sp ); 345 #ifdef DEBUG 346 __CTRACE(__CTRACE_INPUT, 347 "inkey: mbrtowc returns %d, wc(%x)\n", ret, *wc); 348 #endif /* DEBUG */ 349 if ( ret == -2 && *end < *working ) { 350 /* second half of a wide character */ 351 *working = 0; 352 mlen = *end; 353 if ( mlen ) 354 ret = (int) mbrtowc( wc, inbuf, mlen, 355 &_cursesi_screen->sp ); 356 } 357 if ( ret == -2 && wstate != INKEY_TIMEOUT ) { 358 *working = (*working + (int) mlen) 359 % MAX_CBUF_SIZE; 360 wstate = INKEY_WCASSEMBLING; 361 continue; 362 } 363 if ( ret == 0 ) 364 ret = 1; 365 if ( ret == -1 ) { 366 /* return the first key we know about */ 367 *wc = inbuf[ *start ]; 368 *working = *start 369 = ( *start + 1 ) % MAX_CBUF_SIZE; 370 #ifdef DEBUG 371 __CTRACE(__CTRACE_INPUT, 372 "inkey: Invalid wide char(%x)[head(%d), " 373 "current(%d), tail(%d)]\n", 374 *wc, *start, *working, *end); 375 #endif /* DEBUG */ 376 } else { /* > 0 */ 377 /* return the wide character */ 378 *start = *working 379 = ( *working + ret ) % MAX_CBUF_SIZE; 380 #ifdef DEBUG 381 __CTRACE(__CTRACE_INPUT, 382 "inkey: Wide char found(%x)[head(%d), " 383 "current(%d), tail(%d)]\n", 384 *wc, *start, *working, *end); 385 #endif /* DEBUG */ 386 } 387 388 if (*start == *end) { /* only one char processed */ 389 state = wstate = INKEY_NORM; 390 #ifdef DEBUG 391 __CTRACE(__CTRACE_INPUT, 392 "inkey: Empty cbuf=>NORM, " 393 "start(%d), current(%d), end(%d)\n", 394 *start, *working, *end); 395 #endif /* DEBUG */ 396 } else { 397 /* otherwise we must have more than one char to backout */ 398 state = wstate = INKEY_BACKOUT; 399 #ifdef DEBUG 400 __CTRACE(__CTRACE_INPUT, 401 "inkey: Non-empty cbuf=>BACKOUT, " 402 "start(%d), current(%d), end(%d)\n", 403 *start, *working, *end); 404 #endif /* DEBUG */ 405 } 406 return OK; 407 } else { /* must be part of a multikey sequence */ 408 /* check for completed key sequence */ 409 if (current->key[current->mapping[k]]->type 410 == KEYMAP_LEAF) { 411 /* eat the key sequence in cbuf */ 412 *start = *working = ( *working + 1 ) % MAX_CBUF_SIZE; 413 414 /* check if inbuf empty now */ 415 #ifdef DEBUG 416 __CTRACE(__CTRACE_INPUT, 417 "inkey: Key found(%s)\n", 418 key_name(current->key[mapping]->value.symbol)); 419 #endif /* DEBUG */ 420 if (*start == *end) { 421 /* if it is go back to normal */ 422 state = wstate = INKEY_NORM; 423 #ifdef DEBUG 424 __CTRACE(__CTRACE_INPUT, 425 "[inkey]=>NORM, start(%d), " 426 "current(%d), end(%d)", 427 *start, *working, *end); 428 #endif /* DEBUG */ 429 } else { 430 /* otherwise go to backout state */ 431 state = wstate = INKEY_BACKOUT; 432 #ifdef DEBUG 433 __CTRACE(__CTRACE_INPUT, 434 "[inkey]=>BACKOUT, start(%d), " 435 "current(%d), end(%d)", 436 *start, *working, *end ); 437 #endif /* DEBUG */ 438 } 439 440 /* return the symbol */ 441 *wc = current->key[mapping]->value.symbol; 442 return KEY_CODE_YES; 443 } else { 444 /* Step to next part of multi-key sequence */ 445 current = current->key[current->mapping[k]]->value.next; 446 } 447 } 448 } 449 } 450 #endif /* HAVE_WCHAR */ 451 452 /* 453 * get_wch -- 454 * Read in a wide character from stdscr. 455 */ 456 int 457 get_wch(wint_t *ch) 458 { 459 #ifndef HAVE_WCHAR 460 return ERR; 461 #else 462 return wget_wch(stdscr, ch); 463 #endif /* HAVE_WCHAR */ 464 } 465 466 /* 467 * mvget_wch -- 468 * Read in a character from stdscr at the given location. 469 */ 470 int 471 mvget_wch(int y, int x, wint_t *ch) 472 { 473 #ifndef HAVE_WCHAR 474 return ERR; 475 #else 476 return mvwget_wch(stdscr, y, x, ch); 477 #endif /* HAVE_WCHAR */ 478 } 479 480 /* 481 * mvwget_wch -- 482 * Read in a character from stdscr at the given location in the 483 * given window. 484 */ 485 int 486 mvwget_wch(WINDOW *win, int y, int x, wint_t *ch) 487 { 488 #ifndef HAVE_WCHAR 489 return ERR; 490 #else 491 if (wmove(win, y, x) == ERR) 492 return ERR; 493 494 return wget_wch(win, ch); 495 #endif /* HAVE_WCHAR */ 496 } 497 498 /* 499 * wget_wch -- 500 * Read in a wide character from the window. 501 */ 502 int 503 wget_wch(WINDOW *win, wint_t *ch) 504 { 505 #ifndef HAVE_WCHAR 506 return ERR; 507 #else 508 int ret, weset; 509 int c; 510 FILE *infd = _cursesi_screen->infd; 511 cchar_t wc; 512 wchar_t inp, ws[ 2 ]; 513 514 if (!(win->flags & __SCROLLOK) && (win->flags & __FULLWIN) 515 && win->curx == win->maxx - 1 516 && win->cury == win->maxy - 1 517 && __echoit) 518 return (ERR); 519 520 if (is_wintouched(win)) 521 wrefresh(win); 522 #ifdef DEBUG 523 __CTRACE(__CTRACE_INPUT, "wget_wch: __echoit = %d, " 524 "__rawmode = %d, __nl = %d, flags = %#.4x\n", 525 __echoit, __rawmode, _cursesi_screen->nl, win->flags); 526 #endif 527 if (_cursesi_screen->resized) { 528 _cursesi_screen->resized = 0; 529 *ch = KEY_RESIZE; 530 return KEY_CODE_YES; 531 } 532 if (_cursesi_screen->unget_pos) { 533 #ifdef DEBUG 534 __CTRACE(__CTRACE_INPUT, "wget_wch returning char at %d\n", 535 _cursesi_screen->unget_pos); 536 #endif 537 _cursesi_screen->unget_pos--; 538 *ch = _cursesi_screen->unget_list[_cursesi_screen->unget_pos]; 539 if (__echoit) { 540 ws[0] = *ch, ws[1] = L'\0'; 541 setcchar(&wc, ws, win->wattr, 0, NULL); 542 wadd_wch(win, &wc); 543 } 544 return KEY_CODE_YES; 545 } 546 if (__echoit && !__rawmode) { 547 cbreak(); 548 weset = 1; 549 } else 550 weset = 0; 551 552 __save_termios(); 553 554 if (win->flags & __KEYPAD) { 555 switch (win->delay) { 556 case -1: 557 ret = inkey(&inp, 558 win->flags & __NOTIMEOUT ? 0 : 1, 0); 559 break; 560 case 0: 561 if (__nodelay() == ERR) 562 return ERR; 563 ret = inkey(&inp, 0, 0); 564 break; 565 default: 566 ret = inkey(&inp, 567 win->flags & __NOTIMEOUT ? 0 : 1, 568 win->delay); 569 break; 570 } 571 if ( ret == ERR ) 572 return ERR; 573 } else { 574 switch (win->delay) { 575 case -1: 576 break; 577 case 0: 578 if (__nodelay() == ERR) 579 return ERR; 580 break; 581 default: 582 if (__timeout(win->delay) == ERR) 583 return ERR; 584 break; 585 } 586 587 c = getwchar(); 588 if (feof(infd)) { 589 clearerr(infd); 590 __restore_termios(); 591 return ERR; /* we have timed out */ 592 } 593 594 if (ferror(infd)) { 595 clearerr(infd); 596 return ERR; 597 } else { 598 ret = c; 599 inp = c; 600 } 601 } 602 #ifdef DEBUG 603 if (inp > 255) 604 /* we have a key symbol - treat it differently */ 605 /* XXXX perhaps __unctrl should be expanded to include 606 * XXXX the keysyms in the table.... 607 */ 608 __CTRACE(__CTRACE_INPUT, "wget_wch assembled keysym 0x%x\n", 609 inp); 610 else 611 __CTRACE(__CTRACE_INPUT, "wget_wch got '%s'\n", unctrl(inp)); 612 #endif 613 if (win->delay > -1) { 614 if (__delay() == ERR) 615 return ERR; 616 } 617 618 __restore_termios(); 619 620 if (__echoit) { 621 if ( ret == KEY_CODE_YES ) { 622 /* handle [DEL], [BS], and [LEFT] */ 623 if ( win->curx && 624 ( inp == KEY_DC || 625 inp == KEY_BACKSPACE || 626 inp == KEY_LEFT )) { 627 wmove( win, win->cury, win->curx - 1 ); 628 wdelch( win ); 629 } 630 } else { 631 ws[ 0 ] = inp, ws[ 1 ] = L'\0'; 632 setcchar( &wc, ws, win->wattr, 0, NULL ); 633 wadd_wch( win, &wc ); 634 } 635 } 636 637 if (weset) 638 nocbreak(); 639 640 if (_cursesi_screen->nl && inp == 13) 641 inp = 10; 642 643 *ch = inp; 644 645 if ( ret == KEY_CODE_YES ) 646 return KEY_CODE_YES; 647 return ( inp < 0 ? ERR : OK ); 648 #endif /* HAVE_WCHAR */ 649 } 650 651 /* 652 * unget_wch -- 653 * Put the wide character back into the input queue. 654 */ 655 int 656 unget_wch(const wchar_t c) 657 { 658 return __unget((wint_t) c); 659 } 660
Indexes created Tue Sep 23 14:10:03 GMT 2025