1 /**************************************************************************** 2 * Copyright (c) 1998-2012,2013 Free Software Foundation, Inc. * 3 * * 4 * Permission is hereby granted, free of charge, to any person obtaining a * 5 * copy of this software and associated documentation files (the * 6 * "Software"), to deal in the Software without restriction, including * 7 * without limitation the rights to use, copy, modify, merge, publish, * 8 * distribute, distribute with modifications, sublicense, and/or sell * 9 * copies of the Software, and to permit persons to whom the Software is * 10 * furnished to do so, subject to the following conditions: * 11 * * 12 * The above copyright notice and this permission notice shall be included * 13 * in all copies or substantial portions of the Software. * 14 * * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 22 * * 23 * Except as contained in this notice, the name(s) of the above copyright * 24 * holders shall not be used in advertising or otherwise to promote the * 25 * sale, use or other dealings in this Software without prior written * 26 * authorization. * 27 ****************************************************************************/ 28 29 /**************************************************************************** 30 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 * 31 * and: Eric S. Raymond <esr@snark.thyrsus.com> * 32 * and: Thomas E. Dickey 1996-on * 33 * and: Juergen Pfeifer 2009 * 34 ****************************************************************************/ 35 36 /* 37 ** lib_getch.c 38 ** 39 ** The routine getch(). 40 ** 41 */ 42 43 #include <curses.priv.h> 44 45 MODULE_ID("$Id: lib_getch.c,v 1.126 2013/02/16 18:30:37 tom Exp $") 46 47 #include <fifo_defs.h> 48 49 #if USE_REENTRANT 50 #define GetEscdelay(sp) *_nc_ptr_Escdelay(sp) 51 NCURSES_EXPORT(int) 52 NCURSES_PUBLIC_VAR(ESCDELAY) (void) 53 { 54 return *(_nc_ptr_Escdelay(CURRENT_SCREEN)); 55 } 56 57 NCURSES_EXPORT(int *) 58 _nc_ptr_Escdelay(SCREEN *sp) 59 { 60 return ptrEscdelay(sp); 61 } 62 #else 63 #define GetEscdelay(sp) ESCDELAY 64 NCURSES_EXPORT_VAR(int) ESCDELAY = 1000; 65 #endif 66 67 #if NCURSES_EXT_FUNCS 68 NCURSES_EXPORT(int) 69 NCURSES_SP_NAME(set_escdelay) (NCURSES_SP_DCLx int value) 70 { 71 int code = OK; 72 #if USE_REENTRANT 73 if (SP_PARM) { 74 SET_ESCDELAY(value); 75 } else { 76 code = ERR; 77 } 78 #else 79 (void) SP_PARM; 80 ESCDELAY = value; 81 #endif 82 return code; 83 } 84 85 #if NCURSES_SP_FUNCS 86 NCURSES_EXPORT(int) 87 set_escdelay(int value) 88 { 89 int code; 90 #if USE_REENTRANT 91 code = NCURSES_SP_NAME(set_escdelay) (CURRENT_SCREEN, value); 92 #else 93 ESCDELAY = value; 94 code = OK; 95 #endif 96 return code; 97 } 98 #endif 99 #endif /* NCURSES_EXT_FUNCS */ 100 101 #if NCURSES_EXT_FUNCS 102 NCURSES_EXPORT(int) 103 NCURSES_SP_NAME(get_escdelay) (NCURSES_SP_DCL0) 104 { 105 #if !USE_REENTRANT 106 (void) SP_PARM; 107 #endif 108 return GetEscdelay(SP_PARM); 109 } 110 111 #if NCURSES_SP_FUNCS 112 NCURSES_EXPORT(int) 113 get_escdelay(void) 114 { 115 return NCURSES_SP_NAME(get_escdelay) (CURRENT_SCREEN); 116 } 117 #endif 118 #endif /* NCURSES_EXT_FUNCS */ 119 120 static int 121 _nc_use_meta(WINDOW *win) 122 { 123 SCREEN *sp = _nc_screen_of(win); 124 return (sp ? sp->_use_meta : 0); 125 } 126 127 /* 128 * Check for mouse activity, returning nonzero if we find any. 129 */ 130 static int 131 check_mouse_activity(SCREEN *sp, int delay EVENTLIST_2nd(_nc_eventlist * evl)) 132 { 133 int rc; 134 135 #ifdef USE_TERM_DRIVER 136 rc = TCBOf(sp)->drv->testmouse(TCBOf(sp), delay EVENTLIST_2nd(evl)); 137 #else 138 #if USE_SYSMOUSE 139 if ((sp->_mouse_type == M_SYSMOUSE) 140 && (sp->_sysmouse_head < sp->_sysmouse_tail)) { 141 rc = TW_MOUSE; 142 } else 143 #endif 144 { 145 rc = _nc_timed_wait(sp, 146 TWAIT_MASK, 147 delay, 148 (int *) 0 149 EVENTLIST_2nd(evl)); 150 #if USE_SYSMOUSE 151 if ((sp->_mouse_type == M_SYSMOUSE) 152 && (sp->_sysmouse_head < sp->_sysmouse_tail) 153 && (rc == 0) 154 && (errno == EINTR)) { 155 rc |= TW_MOUSE; 156 } 157 #endif 158 } 159 #endif 160 return rc; 161 } 162 163 static NCURSES_INLINE int 164 fifo_peek(SCREEN *sp) 165 { 166 int ch = (peek >= 0) ? sp->_fifo[peek] : ERR; 167 TR(TRACE_IEVENT, ("peeking at %d", peek)); 168 169 p_inc(); 170 return ch; 171 } 172 173 static NCURSES_INLINE int 174 fifo_pull(SCREEN *sp) 175 { 176 int ch = (head >= 0) ? sp->_fifo[head] : ERR; 177 178 TR(TRACE_IEVENT, ("pulling %s from %d", _nc_tracechar(sp, ch), head)); 179 180 if (peek == head) { 181 h_inc(); 182 peek = head; 183 } else { 184 h_inc(); 185 } 186 187 #ifdef TRACE 188 if (USE_TRACEF(TRACE_IEVENT)) { 189 _nc_fifo_dump(sp); 190 _nc_unlock_global(tracef); 191 } 192 #endif 193 return ch; 194 } 195 196 static NCURSES_INLINE int 197 fifo_push(SCREEN *sp EVENTLIST_2nd(_nc_eventlist * evl)) 198 { 199 int n; 200 int ch = 0; 201 int mask = 0; 202 203 (void) mask; 204 if (tail < 0) 205 return ERR; 206 207 #ifdef HIDE_EINTR 208 again: 209 errno = 0; 210 #endif 211 212 #ifdef NCURSES_WGETCH_EVENTS 213 if (evl 214 #if USE_GPM_SUPPORT || USE_EMX_MOUSE || USE_SYSMOUSE 215 || (sp->_mouse_fd >= 0) 216 #endif 217 ) { 218 mask = check_mouse_activity(sp, -1 EVENTLIST_2nd(evl)); 219 } else 220 mask = 0; 221 222 if (mask & TW_EVENT) { 223 T(("fifo_push: ungetch KEY_EVENT")); 224 safe_ungetch(sp, KEY_EVENT); 225 return KEY_EVENT; 226 } 227 #elif USE_GPM_SUPPORT || USE_EMX_MOUSE || USE_SYSMOUSE 228 if (sp->_mouse_fd >= 0) { 229 mask = check_mouse_activity(sp, -1 EVENTLIST_2nd(evl)); 230 } 231 #endif 232 233 #if USE_GPM_SUPPORT || USE_EMX_MOUSE 234 if ((sp->_mouse_fd >= 0) && (mask & TW_MOUSE)) { 235 sp->_mouse_event(sp); 236 ch = KEY_MOUSE; 237 n = 1; 238 } else 239 #endif 240 #if USE_SYSMOUSE 241 if ((sp->_mouse_type == M_SYSMOUSE) 242 && (sp->_sysmouse_head < sp->_sysmouse_tail)) { 243 sp->_mouse_event(sp); 244 ch = KEY_MOUSE; 245 n = 1; 246 } else if ((sp->_mouse_type == M_SYSMOUSE) 247 && (mask <= 0) && errno == EINTR) { 248 sp->_mouse_event(sp); 249 ch = KEY_MOUSE; 250 n = 1; 251 } else 252 #endif 253 #ifdef USE_TERM_DRIVER 254 if ((sp->_mouse_type == M_TERM_DRIVER) 255 && (sp->_drv_mouse_head < sp->_drv_mouse_tail)) { 256 sp->_mouse_event(sp); 257 ch = KEY_MOUSE; 258 n = 1; 259 } else 260 #endif 261 #if USE_KLIBC_KBD 262 if (isatty(sp->_ifd) && sp->_cbreak) { 263 ch = _read_kbd(0, 1, !sp->_raw); 264 n = (ch == -1) ? -1 : 1; 265 sp->_extended_key = (ch == 0); 266 } else 267 #endif 268 { /* Can block... */ 269 #ifdef USE_TERM_DRIVER 270 int buf; 271 n = CallDriver_1(sp, read, &buf); 272 ch = buf; 273 #else 274 unsigned char c2 = 0; 275 # if USE_PTHREADS_EINTR 276 # if USE_WEAK_SYMBOLS 277 if ((pthread_self) && (pthread_kill) && (pthread_equal)) 278 # endif 279 _nc_globals.read_thread = pthread_self(); 280 # endif 281 n = (int) read(sp->_ifd, &c2, (size_t) 1); 282 #if USE_PTHREADS_EINTR 283 _nc_globals.read_thread = 0; 284 #endif 285 ch = c2; 286 #endif 287 } 288 289 #ifdef HIDE_EINTR 290 /* 291 * Under System V curses with non-restarting signals, getch() returns 292 * with value ERR when a handled signal keeps it from completing. 293 * If signals restart system calls, OTOH, the signal is invisible 294 * except to its handler. 295 * 296 * We don't want this difference to show. This piece of code 297 * tries to make it look like we always have restarting signals. 298 */ 299 if (n <= 0 && errno == EINTR 300 # if USE_PTHREADS_EINTR 301 && (_nc_globals.have_sigwinch == 0) 302 # endif 303 ) 304 goto again; 305 #endif 306 307 if ((n == -1) || (n == 0)) { 308 TR(TRACE_IEVENT, ("read(%d,&ch,1)=%d, errno=%d", sp->_ifd, n, errno)); 309 ch = ERR; 310 } 311 TR(TRACE_IEVENT, ("read %d characters", n)); 312 313 sp->_fifo[tail] = ch; 314 sp->_fifohold = 0; 315 if (head == -1) 316 head = peek = tail; 317 t_inc(); 318 TR(TRACE_IEVENT, ("pushed %s at %d", _nc_tracechar(sp, ch), tail)); 319 #ifdef TRACE 320 if (USE_TRACEF(TRACE_IEVENT)) { 321 _nc_fifo_dump(sp); 322 _nc_unlock_global(tracef); 323 } 324 #endif 325 return ch; 326 } 327 328 static NCURSES_INLINE void 329 fifo_clear(SCREEN *sp) 330 { 331 memset(sp->_fifo, 0, sizeof(sp->_fifo)); 332 head = -1; 333 tail = peek = 0; 334 } 335 336 static int kgetch(SCREEN *EVENTLIST_2nd(_nc_eventlist * evl)); 337 338 static void 339 recur_wrefresh(WINDOW *win) 340 { 341 #ifdef USE_PTHREADS 342 SCREEN *sp = _nc_screen_of(win); 343 if (_nc_use_pthreads && sp != CURRENT_SCREEN) { 344 SCREEN *save_SP; 345 346 /* temporarily switch to the window's screen to check/refresh */ 347 _nc_lock_global(curses); 348 save_SP = CURRENT_SCREEN; 349 _nc_set_screen(sp); 350 recur_wrefresh(win); 351 _nc_set_screen(save_SP); 352 _nc_unlock_global(curses); 353 } else 354 #endif 355 if ((is_wintouched(win) || (win->_flags & _HASMOVED)) 356 && !(win->_flags & _ISPAD)) { 357 wrefresh(win); 358 } 359 } 360 361 static int 362 recur_wgetnstr(WINDOW *win, char *buf) 363 { 364 SCREEN *sp = _nc_screen_of(win); 365 int rc; 366 367 if (sp != 0) { 368 #ifdef USE_PTHREADS 369 if (_nc_use_pthreads && sp != CURRENT_SCREEN) { 370 SCREEN *save_SP; 371 372 /* temporarily switch to the window's screen to get cooked input */ 373 _nc_lock_global(curses); 374 save_SP = CURRENT_SCREEN; 375 _nc_set_screen(sp); 376 rc = recur_wgetnstr(win, buf); 377 _nc_set_screen(save_SP); 378 _nc_unlock_global(curses); 379 } else 380 #endif 381 { 382 sp->_called_wgetch = TRUE; 383 rc = wgetnstr(win, buf, MAXCOLUMNS); 384 sp->_called_wgetch = FALSE; 385 } 386 } else { 387 rc = ERR; 388 } 389 return rc; 390 } 391 392 NCURSES_EXPORT(int) 393 _nc_wgetch(WINDOW *win, 394 int *result, 395 int use_meta 396 EVENTLIST_2nd(_nc_eventlist * evl)) 397 { 398 SCREEN *sp; 399 int ch; 400 int rc = 0; 401 #ifdef NCURSES_WGETCH_EVENTS 402 long event_delay = -1; 403 #endif 404 405 T((T_CALLED("_nc_wgetch(%p)"), (void *) win)); 406 407 *result = 0; 408 409 sp = _nc_screen_of(win); 410 if (win == 0 || sp == 0) { 411 returnCode(ERR); 412 } 413 414 if (cooked_key_in_fifo()) { 415 recur_wrefresh(win); 416 *result = fifo_pull(sp); 417 returnCode(*result >= KEY_MIN ? KEY_CODE_YES : OK); 418 } 419 #ifdef NCURSES_WGETCH_EVENTS 420 if (evl && (evl->count == 0)) 421 evl = NULL; 422 event_delay = _nc_eventlist_timeout(evl); 423 #endif 424 425 /* 426 * Handle cooked mode. Grab a string from the screen, 427 * stuff its contents in the FIFO queue, and pop off 428 * the first character to return it. 429 */ 430 if (head == -1 && 431 !sp->_notty && 432 !sp->_raw && 433 !sp->_cbreak && 434 !sp->_called_wgetch) { 435 char buf[MAXCOLUMNS], *bufp; 436 437 TR(TRACE_IEVENT, ("filling queue in cooked mode")); 438 439 /* ungetch in reverse order */ 440 #ifdef NCURSES_WGETCH_EVENTS 441 rc = recur_wgetnstr(win, buf); 442 if (rc != KEY_EVENT && rc != ERR) 443 safe_ungetch(sp, '\n'); 444 #else 445 if (recur_wgetnstr(win, buf) != ERR) 446 safe_ungetch(sp, '\n'); 447 #endif 448 for (bufp = buf + strlen(buf); bufp > buf; bufp--) 449 safe_ungetch(sp, bufp[-1]); 450 451 #ifdef NCURSES_WGETCH_EVENTS 452 /* Return it first */ 453 if (rc == KEY_EVENT) { 454 *result = rc; 455 } else 456 #endif 457 *result = fifo_pull(sp); 458 returnCode(*result >= KEY_MIN ? KEY_CODE_YES : OK); 459 } 460 461 if (win->_use_keypad != sp->_keypad_on) 462 _nc_keypad(sp, win->_use_keypad); 463 464 recur_wrefresh(win); 465 466 if (win->_notimeout || (win->_delay >= 0) || (sp->_cbreak > 1)) { 467 if (head == -1) { /* fifo is empty */ 468 int delay; 469 470 TR(TRACE_IEVENT, ("timed delay in wgetch()")); 471 if (sp->_cbreak > 1) 472 delay = (sp->_cbreak - 1) * 100; 473 else 474 delay = win->_delay; 475 476 #ifdef NCURSES_WGETCH_EVENTS 477 if (event_delay >= 0 && delay > event_delay) 478 delay = event_delay; 479 #endif 480 481 TR(TRACE_IEVENT, ("delay is %d milliseconds", delay)); 482 483 rc = check_mouse_activity(sp, delay EVENTLIST_2nd(evl)); 484 485 #ifdef NCURSES_WGETCH_EVENTS 486 if (rc & TW_EVENT) { 487 *result = KEY_EVENT; 488 returnCode(KEY_CODE_YES); 489 } 490 #endif 491 if (!rc) { 492 goto check_sigwinch; 493 } 494 } 495 /* else go on to read data available */ 496 } 497 498 if (win->_use_keypad) { 499 /* 500 * This is tricky. We only want to get special-key 501 * events one at a time. But we want to accumulate 502 * mouse events until either (a) the mouse logic tells 503 * us it's picked up a complete gesture, or (b) 504 * there's a detectable time lapse after one. 505 * 506 * Note: if the mouse code starts failing to compose 507 * press/release events into clicks, you should probably 508 * increase the wait with mouseinterval(). 509 */ 510 int runcount = 0; 511 512 do { 513 ch = kgetch(sp EVENTLIST_2nd(evl)); 514 if (ch == KEY_MOUSE) { 515 ++runcount; 516 if (sp->_mouse_inline(sp)) 517 break; 518 } 519 if (sp->_maxclick < 0) 520 break; 521 } while 522 (ch == KEY_MOUSE 523 && (((rc = check_mouse_activity(sp, sp->_maxclick 524 EVENTLIST_2nd(evl))) != 0 525 && !(rc & TW_EVENT)) 526 || !sp->_mouse_parse(sp, runcount))); 527 #ifdef NCURSES_WGETCH_EVENTS 528 if ((rc & TW_EVENT) && !(ch == KEY_EVENT)) { 529 safe_ungetch(sp, ch); 530 ch = KEY_EVENT; 531 } 532 #endif 533 if (runcount > 0 && ch != KEY_MOUSE) { 534 #ifdef NCURSES_WGETCH_EVENTS 535 /* mouse event sequence ended by an event, report event */ 536 if (ch == KEY_EVENT) { 537 safe_ungetch(sp, KEY_MOUSE); /* FIXME This interrupts a gesture... */ 538 } else 539 #endif 540 { 541 /* mouse event sequence ended by keystroke, store keystroke */ 542 safe_ungetch(sp, ch); 543 ch = KEY_MOUSE; 544 } 545 } 546 } else { 547 if (head == -1) 548 fifo_push(sp EVENTLIST_2nd(evl)); 549 ch = fifo_pull(sp); 550 } 551 552 if (ch == ERR) { 553 check_sigwinch: 554 #if USE_SIZECHANGE 555 if (_nc_handle_sigwinch(sp)) { 556 _nc_update_screensize(sp); 557 /* resizeterm can push KEY_RESIZE */ 558 if (cooked_key_in_fifo()) { 559 *result = fifo_pull(sp); 560 /* 561 * Get the ERR from queue -- it is from WINCH, 562 * so we should take it out, the "error" is handled. 563 */ 564 if (fifo_peek(sp) == -1) 565 fifo_pull(sp); 566 returnCode(*result >= KEY_MIN ? KEY_CODE_YES : OK); 567 } 568 } 569 #endif 570 returnCode(ERR); 571 } 572 573 /* 574 * If echo() is in effect, display the printable version of the 575 * key on the screen. Carriage return and backspace are treated 576 * specially by Solaris curses: 577 * 578 * If carriage return is defined as a function key in the 579 * terminfo, e.g., kent, then Solaris may return either ^J (or ^M 580 * if nonl() is set) or KEY_ENTER depending on the echo() mode. 581 * We echo before translating carriage return based on nonl(), 582 * since the visual result simply moves the cursor to column 0. 583 * 584 * Backspace is a different matter. Solaris curses does not 585 * translate it to KEY_BACKSPACE if kbs=^H. This does not depend 586 * on the stty modes, but appears to be a hardcoded special case. 587 * This is a difference from ncurses, which uses the terminfo entry. 588 * However, we provide the same visual result as Solaris, moving the 589 * cursor to the left. 590 */ 591 if (sp->_echo && !(win->_flags & _ISPAD)) { 592 chtype backup = (chtype) ((ch == KEY_BACKSPACE) ? '\b' : ch); 593 if (backup < KEY_MIN) 594 wechochar(win, backup); 595 } 596 597 /* 598 * Simulate ICRNL mode 599 */ 600 if ((ch == '\r') && sp->_nl) 601 ch = '\n'; 602 603 /* Strip 8th-bit if so desired. We do this only for characters that 604 * are in the range 128-255, to provide compatibility with terminals 605 * that display only 7-bit characters. Note that 'ch' may be a 606 * function key at this point, so we mustn't strip _those_. 607 */ 608 if (!use_meta) 609 if ((ch < KEY_MIN) && (ch & 0x80)) 610 ch &= 0x7f; 611 612 T(("wgetch returning : %s", _nc_tracechar(sp, ch))); 613 614 *result = ch; 615 returnCode(ch >= KEY_MIN ? KEY_CODE_YES : OK); 616 } 617 618 #ifdef NCURSES_WGETCH_EVENTS 619 NCURSES_EXPORT(int) 620 wgetch_events(WINDOW *win, _nc_eventlist * evl) 621 { 622 int code; 623 int value; 624 625 T((T_CALLED("wgetch_events(%p,%p)"), win, evl)); 626 code = _nc_wgetch(win, 627 &value, 628 _nc_use_meta(win) 629 EVENTLIST_2nd(evl)); 630 if (code != ERR) 631 code = value; 632 returnCode(code); 633 } 634 #endif 635 636 NCURSES_EXPORT(int) 637 wgetch(WINDOW *win) 638 { 639 int code; 640 int value; 641 642 T((T_CALLED("wgetch(%p)"), (void *) win)); 643 code = _nc_wgetch(win, 644 &value, 645 _nc_use_meta(win) 646 EVENTLIST_2nd((_nc_eventlist *) 0)); 647 if (code != ERR) 648 code = value; 649 returnCode(code); 650 } 651 652 /* 653 ** int 654 ** kgetch() 655 ** 656 ** Get an input character, but take care of keypad sequences, returning 657 ** an appropriate code when one matches the input. After each character 658 ** is received, set an alarm call based on ESCDELAY. If no more of the 659 ** sequence is received by the time the alarm goes off, pass through 660 ** the sequence gotten so far. 661 ** 662 ** This function must be called when there are no cooked keys in queue. 663 ** (that is head==-1 || peek==head) 664 ** 665 */ 666 667 static int 668 kgetch(SCREEN *sp EVENTLIST_2nd(_nc_eventlist * evl)) 669 { 670 TRIES *ptr; 671 int ch = 0; 672 int timeleft = GetEscdelay(sp); 673 674 TR(TRACE_IEVENT, ("kgetch() called")); 675 676 ptr = sp->_keytry; 677 678 for (;;) { 679 if (cooked_key_in_fifo() && sp->_fifo[head] >= KEY_MIN) { 680 break; 681 } else if (!raw_key_in_fifo()) { 682 ch = fifo_push(sp EVENTLIST_2nd(evl)); 683 if (ch == ERR) { 684 peek = head; /* the keys stay uninterpreted */ 685 return ERR; 686 } 687 #ifdef NCURSES_WGETCH_EVENTS 688 else if (ch == KEY_EVENT) { 689 peek = head; /* the keys stay uninterpreted */ 690 return fifo_pull(sp); /* Remove KEY_EVENT from the queue */ 691 } 692 #endif 693 } 694 695 ch = fifo_peek(sp); 696 if (ch >= KEY_MIN) { 697 /* If not first in queue, somebody put this key there on purpose in 698 * emergency. Consider it higher priority than the unfinished 699 * keysequence we are parsing. 700 */ 701 peek = head; 702 /* assume the key is the last in fifo */ 703 t_dec(); /* remove the key */ 704 return ch; 705 } 706 707 TR(TRACE_IEVENT, ("ch: %s", _nc_tracechar(sp, (unsigned char) ch))); 708 while ((ptr != NULL) && (ptr->ch != (unsigned char) ch)) 709 ptr = ptr->sibling; 710 711 if (ptr == NULL) { 712 TR(TRACE_IEVENT, ("ptr is null")); 713 break; 714 } 715 TR(TRACE_IEVENT, ("ptr=%p, ch=%d, value=%d", 716 (void *) ptr, ptr->ch, ptr->value)); 717 718 if (ptr->value != 0) { /* sequence terminated */ 719 TR(TRACE_IEVENT, ("end of sequence")); 720 if (peek == tail) { 721 fifo_clear(sp); 722 } else { 723 head = peek; 724 } 725 return (ptr->value); 726 } 727 728 ptr = ptr->child; 729 730 if (!raw_key_in_fifo()) { 731 int rc; 732 733 TR(TRACE_IEVENT, ("waiting for rest of sequence")); 734 rc = check_mouse_activity(sp, timeleft EVENTLIST_2nd(evl)); 735 #ifdef NCURSES_WGETCH_EVENTS 736 if (rc & TW_EVENT) { 737 TR(TRACE_IEVENT, ("interrupted by a user event")); 738 /* FIXME Should have preserved remainder timeleft for reuse... */ 739 peek = head; /* Restart interpreting later */ 740 return KEY_EVENT; 741 } 742 #endif 743 if (!rc) { 744 TR(TRACE_IEVENT, ("ran out of time")); 745 break; 746 } 747 } 748 } 749 ch = fifo_pull(sp); 750 peek = head; 751 return ch; 752 } 753