lib/libcurses/get_wch.c

   1 /*   $NetBSD: get_wch.c,v 1.7 2009/11/01 22:11:27 dsl 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@arl.wustl.edu,ruibiao@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 1.7 2009/11/01 22:11:27 dsl 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, MAX_CBUF_SIZE * sizeof( int ));
  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
  95 #ifdef DEBUG
  96         __CTRACE(__CTRACE_INPUT, "inkey (%p, %d, %d)\n", wc, to, delay);
  97 #endif
  98         for (;;) { /* loop until we get a complete key sequence */
  99                 if (wstate == INKEY_NORM) {
 100                         if (delay && __timeout(delay) == ERR)
 101                                 return ERR;
 102                         c = fgetc(infd);
 103                         if (c == WEOF) {
 104                                 clearerr(infd);
 105                                 return ERR;
 106                         }
 107
 108                         if (delay && (__notimeout() == ERR))
 109                                 return ERR;
 110
 111                         k = (wchar_t) c;
 112 #ifdef DEBUG
 113                         __CTRACE(__CTRACE_INPUT,
 114                             "inkey (wstate normal) got '%s'\n", unctrl(k));
 115 #endif
 116
 117                         inbuf[ *end ] = k;
 118                         *end = ( *end + 1 ) % MAX_CBUF_SIZE;
 119                         *working = *start;
 120                         wstate = INKEY_ASSEMBLING; /* go to assembling state */
 121 #ifdef DEBUG
 122                         __CTRACE(__CTRACE_INPUT,
 123                             "inkey: NORM=>ASSEMBLING: start(%d), "
 124                             "current(%d), end(%d)\n", *start, *working, *end);
 125 #endif /* DEBUG */
 126                 } else if (wstate == INKEY_BACKOUT) {
 127                         k = inbuf[*working];
 128                         *working = ( *working + 1 ) % MAX_CBUF_SIZE;
 129                         if (*working == *end) { /* see if run out of keys */
 130                                 /* if so, switch to assembling */
 131                                 wstate = INKEY_ASSEMBLING;
 132 #ifdef DEBUG
 133                                 __CTRACE(__CTRACE_INPUT,
 134                                     "inkey: BACKOUT=>ASSEMBLING, start(%d), "
 135                                     "current(%d), end(%d)\n",
 136                                     *start, *working, *end);
 137 #endif /* DEBUG */
 138                         }
 139                 } else if (wstate == INKEY_ASSEMBLING) {
 140                         /* assembling a key sequence */
 141                         if (delay) {
 142                                 if (__timeout(to ? (ESCDELAY / 100) : delay)
 143                                                 == ERR)
 144                                         return ERR;
 145                         } else {
 146                                 if (to && (__timeout(ESCDELAY / 100) == ERR))
 147                                         return ERR;
 148                         }
 149
 150                         c = fgetc(infd);
 151                         if (ferror(infd)) {
 152                                 clearerr(infd);
 153                                 return ERR;
 154                         }
 155
 156                         if ((to || delay) && (__notimeout() == ERR))
 157                                 return ERR;
 158
 159                         k = (wchar_t) c;
 160 #ifdef DEBUG
 161                         __CTRACE(__CTRACE_INPUT,
 162                             "inkey (wstate assembling) got '%s'\n", unctrl(k));
 163 #endif /* DEBUG */
 164                         if (feof(infd)) { /* inter-char T/O, start backout */
 165                                 clearerr(infd);
 166                                 if (*start == *end)
 167                                         /* no chars in the buffer, restart */
 168                                         continue;
 169
 170                                 k = inbuf[*start];
 171                                 wstate = INKEY_TIMEOUT;
 172 #ifdef DEBUG
 173                                 __CTRACE(__CTRACE_INPUT,
 174                                     "inkey: ASSEMBLING=>TIMEOUT, start(%d), "
 175                                     "current(%d), end(%d)\n",
 176                                     *start, *working, *end);
 177 #endif /* DEBUG */
 178                         } else {
 179                                 inbuf[ *end ] = k;
 180                                 *working = *end;
 181                                 *end = ( *end + 1 ) % MAX_CBUF_SIZE;
 182 #ifdef DEBUG
 183                                 __CTRACE(__CTRACE_INPUT,
 184                                     "inkey: ASSEMBLING: start(%d), "
 185                                     "current(%d), end(%d)",
 186                                     *start, *working, *end);
 187 #endif /* DEBUG */
 188                         }
 189                 } else if (wstate == INKEY_WCASSEMBLING) {
 190                         /* assembling a wide char sequence */
 191                         if (delay) {
 192                                 if (__timeout(to ? (ESCDELAY / 100) : delay)
 193                                                 == ERR)
 194                                         return ERR;
 195                         } else {
 196                                 if (to && (__timeout(ESCDELAY / 100) == ERR))
 197                                         return ERR;
 198                         }
 199
 200                         c = fgetc(infd);
 201                         if (ferror(infd)) {
 202                                 clearerr(infd);
 203                                 return ERR;
 204                         }
 205
 206                         if ((to || delay) && (__notimeout() == ERR))
 207                                 return ERR;
 208
 209                         k = (wchar_t) c;
 210 #ifdef DEBUG
 211                         __CTRACE(__CTRACE_INPUT,
 212                             "inkey (wstate wcassembling) got '%s'\n",
 213                                 unctrl(k));
 214 #endif
 215                         if (feof(infd)) { /* inter-char T/O, start backout */
 216                                 clearerr(infd);
 217                                 if (*start == *end)
 218                                         /* no chars in the buffer, restart */
 219                                         continue;
 220
 221                                 *wc = inbuf[*start];
 222                                 *working = *start
 223                                         = ( *start + 1 ) % MAX_CBUF_SIZE;
 224                                 if (*start == *end) {
 225                                         state = wstate = INKEY_NORM;
 226 #ifdef DEBUG
 227                                         __CTRACE(__CTRACE_INPUT,
 228                                             "inkey: WCASSEMBLING=>NORM, "
 229                                             "start(%d), current(%d), end(%d)",
 230                                             *start, *working, *end);
 231 #endif /* DEBUG */
 232                                 } else {
 233                                         state = wstate = INKEY_BACKOUT;
 234 #ifdef DEBUG
 235                                         __CTRACE(__CTRACE_INPUT,
 236                                             "inkey: WCASSEMBLING=>BACKOUT, "
 237                                             "start(%d), current(%d), end(%d)",
 238                                             *start, *working, *end);
 239 #endif /* DEBUG */
 240                                 }
 241                                 return OK;
 242                         } else {
 243                                 /* assembling wide characters */
 244                                 inbuf[ *end ] = k;
 245                                 *working = *end;
 246                                 *end = ( *end + 1 ) % MAX_CBUF_SIZE;
 247 #ifdef DEBUG
 248                                 __CTRACE(__CTRACE_INPUT,
 249                                     "inkey: WCASSEMBLING[head(%d), "
 250                                     "urrent(%d), tail(%d)]\n",
 251                                     *start, *working, *end);
 252 #endif /* DEBUG */
 253                                 ret = (int) mbrtowc( wc, inbuf + (*working), 1,
 254                                         &_cursesi_screen->sp );
 255 #ifdef DEBUG
 256                                 __CTRACE(__CTRACE_INPUT,
 257                                     "inkey: mbrtowc returns %d, wc(%x)\n",
 258                                     ret, *wc );
 259 #endif /* DEBUG */
 260                                 if ( ret == -2 ) {
 261                                         *working = (*working + 1)
 262                                                 % MAX_CBUF_SIZE;
 263                                         continue;
 264                                 }
 265                                 if ( ret == 0 )
 266                                         ret = 1;
 267                                 if ( ret == -1 ) {
 268                                         /* return the 1st character we know */
 269                                         *wc = inbuf[ *start ];
 270                                         *working = *start = ( *start + 1 ) % MAX_CBUF_SIZE;
 271 #ifdef DEBUG
 272                                         __CTRACE(__CTRACE_INPUT,
 273                                             "inkey: Invalid wide char(%x) "
 274                                             "[head(%d), current(%d), "
 275                                             "tail(%d)]\n",
 276                                             *wc, *start, *working, *end);
 277 #endif /* DEBUG */
 278                                 } else { /* > 0 */
 279                                         /* return the wide character */
 280                                         *start = *working
 281                                                = (*working + ret)%MAX_CBUF_SIZE;
 282 #ifdef DEBUG
 283                                         __CTRACE(__CTRACE_INPUT,
 284                                             "inkey: Wide char found(%x) "
 285                                             "[head(%d), current(%d), "
 286                                             "tail(%d)]\n",
 287                                             *wc, *start, *working, *end);
 288 #endif /* DEBUG */
 289                                 }
 290
 291                                 if (*start == *end) {   /* only one char processed */
 292                                         state = wstate = INKEY_NORM;
 293 #ifdef DEBUG
 294                                         __CTRACE(__CTRACE_INPUT,
 295                                             "inkey: WCASSEMBLING=>NORM, "
 296                                             "start(%d), current(%d), end(%d)",
 297                                             *start, *working, *end);
 298 #endif /* DEBUG */
 299                                 } else {
 300                                         /* otherwise we must have more than one char to backout */
 301                                         state = wstate = INKEY_BACKOUT;
 302 #ifdef DEBUG
 303                                         __CTRACE(__CTRACE_INPUT,
 304                                             "inkey: WCASSEMBLING=>BACKOUT, "
 305                                             "start(%d), current(%d), end(%d)",
 306                                             *start, *working, *end);
 307 #endif /* DEBUG */
 308                                 }
 309                                 return OK;
 310                         }
 311                 } else {
 312                         fprintf(stderr, "Inkey wstate screwed - exiting!!!");
 313                         exit(2);
 314                 }
 315
 316                 /*
 317                  * Check key has no special meaning and we have not
 318                  * timed out and the key has not been disabled
 319                  */
 320                 mapping = current->mapping[k];
 321                 if (((wstate == INKEY_TIMEOUT) || (mapping < 0))
 322                                 || ((current->key[mapping]->type
 323                                         == KEYMAP_LEAF)
 324                                 && (current->key[mapping]->enable == FALSE))) {
 325                         /* wide character specific code */
 326 #ifdef DEBUG
 327                         __CTRACE(__CTRACE_INPUT,
 328                             "inkey: Checking for wide char\n");
 329 #endif /* DEBUG */
 330                         mbrtowc( NULL, NULL, 1, &_cursesi_screen->sp );
 331                         *working = *start;
 332                         mlen = *end > *working ?
 333                                 *end - *working : MAX_CBUF_SIZE - *working;
 334                         if ( !mlen )
 335                                 return ERR;
 336 #ifdef DEBUG
 337                         __CTRACE(__CTRACE_INPUT,
 338                             "inkey: Check wide char[head(%d), "
 339                             "current(%d), tail(%d), mlen(%ld)]\n",
 340                             *start, *working, *end, (long) mlen);
 341 #endif /* DEBUG */
 342                         ret = (int) mbrtowc( wc, inbuf + (*working), mlen,
 343                                 &_cursesi_screen->sp );
 344 #ifdef DEBUG
 345                         __CTRACE(__CTRACE_INPUT,
 346                             "inkey: mbrtowc returns %d, wc(%x)\n", ret, *wc);
 347 #endif /* DEBUG */
 348                         if ( ret == -2 && *end < *working ) {
 349                                 /* second half of a wide character */
 350                                 *working = 0;
 351                                 mlen = *end;
 352                                 if ( mlen )
 353                                         ret = (int) mbrtowc( wc, inbuf, mlen,
 354                                                 &_cursesi_screen->sp );
 355                         }
 356                         if ( ret == -2 && wstate != INKEY_TIMEOUT ) {
 357                                 *working = (*working + (int) mlen)
 358                                         % MAX_CBUF_SIZE;
 359                                 wstate = INKEY_WCASSEMBLING;
 360                                 continue;
 361                         }
 362                         if ( ret == 0 )
 363                                 ret = 1;
 364                         if ( ret == -1 ) {
 365                                 /* return the first key we know about */
 366                                 *wc = inbuf[ *start ];
 367                                 *working = *start
 368                                         = ( *start + 1 ) % MAX_CBUF_SIZE;
 369 #ifdef DEBUG
 370                                 __CTRACE(__CTRACE_INPUT,
 371                                     "inkey: Invalid wide char(%x)[head(%d), "
 372                                     "current(%d), tail(%d)]\n",
 373                                     *wc, *start, *working, *end);
 374 #endif /* DEBUG */
 375                         } else { /* > 0 */
 376                                 /* return the wide character */
 377                                 *start = *working
 378                                         = ( *working + ret ) % MAX_CBUF_SIZE;
 379 #ifdef DEBUG
 380                                 __CTRACE(__CTRACE_INPUT,
 381                                     "inkey: Wide char found(%x)[head(%d), "
 382                                     "current(%d), tail(%d)]\n",
 383                                     *wc, *start, *working, *end);
 384 #endif /* DEBUG */
 385                         }
 386
 387                         if (*start == *end) {   /* only one char processed */
 388                                 state = wstate = INKEY_NORM;
 389 #ifdef DEBUG
 390                                 __CTRACE(__CTRACE_INPUT,
 391                                     "inkey: Empty cbuf=>NORM, "
 392                                     "start(%d), current(%d), end(%d)\n",
 393                                     *start, *working, *end);
 394 #endif /* DEBUG */
 395                         } else {
 396                                 /* otherwise we must have more than one char to backout */
 397                                 state = wstate = INKEY_BACKOUT;
 398 #ifdef DEBUG
 399                                 __CTRACE(__CTRACE_INPUT,
 400                                     "inkey: Non-empty cbuf=>BACKOUT, "
 401                                     "start(%d), current(%d), end(%d)\n",
 402                                     *start, *working, *end);
 403 #endif /* DEBUG */
 404                         }
 405                         return OK;
 406                 } else {        /* must be part of a multikey sequence */
 407                                         /* check for completed key sequence */
 408                         if (current->key[current->mapping[k]]->type
 409                                         == KEYMAP_LEAF) {
 410                                 /* eat the key sequence in cbuf */
 411                                 *start = *working = ( *working + 1 ) % MAX_CBUF_SIZE;
 412
 413                                 /* check if inbuf empty now */
 414 #ifdef DEBUG
 415                                 __CTRACE(__CTRACE_INPUT,
 416                                     "inkey: Key found(%s)\n",
 417                                     key_name(current->key[mapping]->value.symbol));
 418 #endif /* DEBUG */
 419                                 if (*start == *end) {
 420                                         /* if it is go back to normal */
 421                                         state = wstate = INKEY_NORM;
 422 #ifdef DEBUG
 423                                         __CTRACE(__CTRACE_INPUT,
 424                                             "[inkey]=>NORM, start(%d), "
 425                                             "current(%d), end(%d)",
 426                                             *start, *working, *end);
 427 #endif /* DEBUG */
 428                                 } else {
 429                                         /* otherwise go to backout state */
 430                                         state = wstate = INKEY_BACKOUT;
 431 #ifdef DEBUG
 432                                         __CTRACE(__CTRACE_INPUT,
 433                                             "[inkey]=>BACKOUT, start(%d), "
 434                                             "current(%d), end(%d)",
 435                                             *start, *working, *end );
 436 #endif /* DEBUG */
 437                                 }
 438
 439                                 /* return the symbol */
 440                                 *wc = current->key[mapping]->value.symbol;
 441                                 return KEY_CODE_YES;
 442                         } else {
 443                                 /* Step to next part of multi-key sequence */
 444                                 current = current->key[current->mapping[k]]->value.next;
 445                         }
 446                 }
 447         }
 448 }
 449 #endif /* HAVE_WCHAR */
 450
 451 /*
 452  * get_wch --
 453  *      Read in a wide character from stdscr.
 454  */
 455 int
 456 get_wch(wint_t *ch)
 457 {
 458 #ifndef HAVE_WCHAR
 459         return ERR;
 460 #else
 461         return wget_wch(stdscr, ch);
 462 #endif /* HAVE_WCHAR */
 463 }
 464
 465 /*
 466  * mvget_wch --
 467  *        Read in a character from stdscr at the given location.
 468  */
 469 int
 470 mvget_wch(int y, int x, wint_t *ch)
 471 {
 472 #ifndef HAVE_WCHAR
 473         return ERR;
 474 #else
 475         return mvwget_wch(stdscr, y, x, ch);
 476 #endif /* HAVE_WCHAR */
 477 }
 478
 479 /*
 480  * mvwget_wch --
 481  *        Read in a character from stdscr at the given location in the
 482  *        given window.
 483  */
 484 int
 485 mvwget_wch(WINDOW *win, int y, int x, wint_t *ch)
 486 {
 487 #ifndef HAVE_WCHAR
 488         return ERR;
 489 #else
 490         if (wmove(win, y, x) == ERR)
 491                 return ERR;
 492
 493         return wget_wch(win, ch);
 494 #endif /* HAVE_WCHAR */
 495 }
 496
 497 /*
 498  * wget_wch --
 499  *      Read in a wide character from the window.
 500  */
 501 int
 502 wget_wch(WINDOW *win, wint_t *ch)
 503 {
 504 #ifndef HAVE_WCHAR
 505         return ERR;
 506 #else
 507         int ret, weset;
 508         int c;
 509         FILE *infd = _cursesi_screen->infd;
 510         cchar_t wc;
 511         wchar_t inp, ws[ 2 ];
 512
 513         if (!(win->flags & __SCROLLOK) && (win->flags & __FULLWIN)
 514                         && win->curx == win->maxx - 1
 515                         && win->cury == win->maxy - 1
 516                         && __echoit)
 517                 return (ERR);
 518
 519         if (is_wintouched(win))
 520                 wrefresh(win);
 521 #ifdef DEBUG
 522         __CTRACE(__CTRACE_INPUT, "wget_wch: __echoit = %d, "
 523             "__rawmode = %d, __nl = %d, flags = %#.4x\n",
 524             __echoit, __rawmode, _cursesi_screen->nl, win->flags);
 525 #endif
 526         if (_cursesi_screen->resized) {
 527                 _cursesi_screen->resized = 0;
 528                 *ch = KEY_RESIZE;
 529                 return KEY_CODE_YES;
 530         }
 531         if (_cursesi_screen->unget_pos) {
 532 #ifdef DEBUG
 533                 __CTRACE(__CTRACE_INPUT, "wget_wch returning char at %d\n",
 534                     _cursesi_screen->unget_pos);
 535 #endif
 536                 _cursesi_screen->unget_pos--;
 537                 *ch = _cursesi_screen->unget_list[_cursesi_screen->unget_pos];
 538                 if (__echoit) {
 539                         ws[0] = *ch, ws[1] = L'\0';
 540                         setcchar(&wc, ws, win->wattr, 0, NULL);
 541                         wadd_wch(win, &wc);
 542                 }
 543                 return KEY_CODE_YES;
 544         }
 545         if (__echoit && !__rawmode) {
 546                 cbreak();
 547                 weset = 1;
 548         } else
 549                 weset = 0;
 550
 551         __save_termios();
 552
 553         if (win->flags & __KEYPAD) {
 554                 switch (win->delay) {
 555                         case -1:
 556                                 ret = inkey(&inp,
 557                                         win->flags & __NOTIMEOUT ? 0 : 1, 0);
 558                                 break;
 559                         case 0:
 560                                 if (__nodelay() == ERR)
 561                                         return ERR;
 562                                 ret = inkey(&inp, 0, 0);
 563                                 break;
 564                         default:
 565                                 ret = inkey(&inp,
 566                                         win->flags & __NOTIMEOUT ? 0 : 1,
 567                                         win->delay);
 568                                 break;
 569                 }
 570                 if ( ret == ERR )
 571                         return ERR;
 572         } else {
 573                 switch (win->delay) {
 574                         case -1:
 575                                 break;
 576                         case 0:
 577                                 if (__nodelay() == ERR)
 578                                         return ERR;
 579                                 break;
 580                         default:
 581                                 if (__timeout(win->delay) == ERR)
 582                                         return ERR;
 583                                 break;
 584                 }
 585
 586                 c = getwchar();
 587                 if (feof(infd)) {
 588                         clearerr(infd);
 589                         __restore_termios();
 590                         return ERR;     /* we have timed out */
 591                 }
 592
 593                 if (ferror(infd)) {
 594                         clearerr(infd);
 595                         return ERR;
 596                 } else {
 597                         ret = c;
 598                         inp = c;
 599                 }
 600         }
 601 #ifdef DEBUG
 602         if (inp > 255)
 603                 /* we have a key symbol - treat it differently */
 604                 /* XXXX perhaps __unctrl should be expanded to include
 605                  * XXXX the keysyms in the table....
 606                  */
 607                 __CTRACE(__CTRACE_INPUT, "wget_wch assembled keysym 0x%x\n",
 608                     inp);
 609         else
 610                 __CTRACE(__CTRACE_INPUT, "wget_wch got '%s'\n", unctrl(inp));
 611 #endif
 612         if (win->delay > -1) {
 613                 if (__delay() == ERR)
 614                         return ERR;
 615         }
 616
 617         __restore_termios();
 618
 619         if (__echoit) {
 620                 if ( ret == KEY_CODE_YES ) {
 621                         /* handle [DEL], [BS], and [LEFT] */
 622                         if ( win->curx &&
 623                                         ( inp == KEY_DC ||
 624                                           inp == KEY_BACKSPACE ||
 625                                           inp == KEY_LEFT )) {
 626                                 wmove( win, win->cury, win->curx - 1 );
 627                                 wdelch( win );
 628                         }
 629                 } else {
 630                         ws[ 0 ] = inp, ws[ 1 ] = L'\0';
 631                         setcchar( &wc, ws, win->wattr, 0, NULL );
 632                         wadd_wch( win, &wc );
 633                 }
 634         }
 635
 636         if (weset)
 637                 nocbreak();
 638
 639         if (_cursesi_screen->nl && inp == 13)
 640                 inp = 10;
 641
 642         *ch = inp;
 643
 644         if ( ret == KEY_CODE_YES )
 645                 return KEY_CODE_YES;
 646         return ( inp < 0 ? ERR : OK );
 647 #endif /* HAVE_WCHAR */
 648 }
 649
 650 /*
 651  * unget_wch --
 652  *       Put the wide character back into the input queue.
 653  */
 654 int
 655 unget_wch(const wchar_t c)
 656 {
 657         return __unget((wint_t) c);
 658 }