menu_sys.def revision 1.11
1/* $NetBSD: menu_sys.def,v 1.11 1998/07/01 07:46:02 phil Exp $ */ 2 3/* 4 * Copyright 1997 Piermont Information Systems Inc. 5 * All rights reserved. 6 * 7 * Written by Philip A. Nelson for Piermont Information Systems Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software develooped for the NetBSD Project by 20 * Piermont Information Systems Inc. 21 * 4. The name of Piermont Information Systems Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY PIERMONT INFORMATION SYSTEMS INC. ``AS IS'' 26 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL PIERMONT INFORMATION SYSTEMS INC. BE 29 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 35 * THE POSSIBILITY OF SUCH DAMAGE. 36 * 37 */ 38 39/* menu_sys.defs -- Menu system standard routines. */ 40 41#include <string.h> 42#include <ctype.h> 43 44#define REQ_EXECUTE 1000 45#define REQ_NEXT_ITEM 1001 46#define REQ_PREV_ITEM 1002 47#define REQ_REDISPLAY 1003 48#define REQ_SCROLLDOWN 1004 49#define REQ_SCROLLUP 1005 50#define REQ_HELP 1006 51 52/* Multiple key support */ 53#define KEYSEQ_FIRST 256 54#define KEYSEQ_DOWN_ARROW 256 55#define KEYSEQ_UP_ARROW 257 56#define KEYSEQ_LEFT_ARROW 258 57#define KEYSEQ_RIGHT_ARROW 259 58#define KEYSEQ_PAGE_DOWN 260 59#define KEYSEQ_PAGE_UP 261 60 61struct keyseq { 62 char *termcap_name; 63 char *chars; 64 int numchars; 65 int keyseq_val; 66 struct keyseq *next; 67}; 68 69/* keypad and other definitions */ 70struct keyseq _mc_key_seq[] = { 71 /* Cludge for xterm ... */ 72 { NULL, "\033[B", 0, KEYSEQ_DOWN_ARROW, NULL }, 73 { NULL, "\033[D", 0, KEYSEQ_LEFT_ARROW, NULL }, 74 { NULL, "\033[C", 0, KEYSEQ_RIGHT_ARROW, NULL }, 75 { NULL, "\033[A", 0, KEYSEQ_UP_ARROW, NULL }, 76 /* Termcap defined */ 77 { "kd", NULL, 0, KEYSEQ_DOWN_ARROW, NULL }, 78 { "kl", NULL, 0, KEYSEQ_LEFT_ARROW, NULL }, 79 { "kr", NULL, 0, KEYSEQ_RIGHT_ARROW, NULL }, 80 { "ku", NULL, 0, KEYSEQ_UP_ARROW, NULL }, 81 { "kf", NULL, 0, KEYSEQ_PAGE_DOWN, NULL }, /* scroll forward */ 82 { "kN", NULL, 0, KEYSEQ_PAGE_DOWN, NULL }, /* next page */ 83 { "kP", NULL, 0, KEYSEQ_PAGE_UP, NULL }, /* scroll backward */ 84 { "kR", NULL, 0, KEYSEQ_PAGE_UP, NULL }, /* prev page */ 85 /* other definitions */ 86 { NULL, "\033v", 0, KEYSEQ_PAGE_UP, NULL }, /* ESC-v */ 87 { NULL, "\026", 0, KEYSEQ_PAGE_DOWN, NULL }, /* CTL-v */ 88}; 89 90int _mc_num_key_seq = sizeof(_mc_key_seq) / sizeof(struct keyseq); 91struct keyseq *pad_list = NULL; 92static char str_area [512]; 93static char *str_ptr = str_area; 94 95/* Macros */ 96#define MAX(x,y) ((x)>(y)?(x):(y)) 97#define MIN(x,y) ((x)<(y)?(x):(y)) 98 99/* Initialization state. */ 100static int __menu_init = 0; 101int __m_endwin = 0; 102static int max_lines = 0; 103static char *scrolltext = " <: page up, >: page down"; 104 105/* prototypes for in here! */ 106static void ins_keyseq (struct keyseq **seq, struct keyseq *ins); 107static void init_keyseq (void); 108static void init_menu (struct menudesc *m); 109static void post_menu (struct menudesc *m); 110static void process_help (struct menudesc *m, int num); 111static void process_req (struct menudesc *m, int num, int req); 112static void mbeep (void); 113static int menucmd (WINDOW *w); 114 115#ifndef NULL 116#define NULL (void *)0 117#endif 118 119/* menu system processing routines */ 120 121static void mbeep (void) 122{ 123 fprintf (stderr,"\a"); 124} 125 126static void ins_keyseq (struct keyseq **seq, struct keyseq *ins) 127{ 128 if (*seq == NULL) { 129 ins->next = NULL; 130 *seq = ins; 131 } else if (ins->numchars <= (*seq)->numchars) { 132 ins->next = *seq; 133 *seq = ins; 134 } else 135 ins_keyseq (&(*seq)->next, ins); 136} 137 138static void init_keyseq (void) 139{ 140 int i; 141 for (i=0; i<_mc_num_key_seq; i++) { 142 if (_mc_key_seq[i].termcap_name) 143 _mc_key_seq[i].chars = 144 tgetstr (_mc_key_seq[i].termcap_name, 145 &str_ptr); 146 if (_mc_key_seq[i].chars != NULL && 147 (_mc_key_seq[i].numchars = strlen(_mc_key_seq[i].chars)) 148 > 0) 149 ins_keyseq (&pad_list,&_mc_key_seq[i]); 150 } 151} 152 153static int mgetch(WINDOW *w) 154{ 155 static char buf[20]; 156 static int num = 0; 157 struct keyseq *list = pad_list; 158 int i, ret; 159 160 /* key pad processing */ 161 while (list) { 162 for (i=0; i< list->numchars; i++) { 163 if (i >= num) 164 buf[num++] = wgetch(w); 165 if (buf[i] != list->chars[i]) 166 break; 167 } 168 if (i == list->numchars) { 169 num = 0; 170 return list->keyseq_val; 171 } 172 list = list->next; 173 } 174 175 ret = buf[0]; 176 for (i = 0; i < strlen(buf); i++) 177 buf[i] = buf[i+1]; 178 num--; 179 return ret; 180} 181 182static int menucmd (WINDOW *w) 183{ 184 int ch; 185 186 while (TRUE) { 187 ch = mgetch(w); 188 189 switch (ch) { 190 case '\n': 191 return REQ_EXECUTE; 192 case '\016': /* Contnrol-P */ 193 case KEYSEQ_DOWN_ARROW: 194 return REQ_NEXT_ITEM; 195 case '\020': /* Control-N */ 196 case KEYSEQ_UP_ARROW: 197 return REQ_PREV_ITEM; 198 case '\014': /* Control-L */ 199 return REQ_REDISPLAY; 200 case '<': 201 case '\010': /* Control-H (backspace) */ 202 case KEYSEQ_PAGE_UP: 203 return REQ_SCROLLUP; 204 case '>': 205 case ' ': 206 case KEYSEQ_PAGE_DOWN: 207 return REQ_SCROLLDOWN; 208 case '?': 209 return REQ_HELP; 210 } 211 212 if (isalpha(ch)) 213 return (ch); 214 215 mbeep(); 216 wrefresh(w); 217 } 218} 219 220static void init_menu (struct menudesc *m) 221{ 222 int max; 223 char **p; 224 int add, exitadd; 225 226 add = ((m->mopt & NOBOX) ? 2 : 4); 227 exitadd = ((m->mopt & NOEXITOPT) ? 0 : 1); 228 max = strlen(m->title); 229 230 /* Calculate h? h == number of visible options. */ 231 if (m->h == 0) { 232 m->h = m->numopts + exitadd; 233 if (m->h + m->y + add >= max_lines && (m->mopt & SCROLL)) 234 m->h = max_lines - m->y - add ; 235 } 236 237 /* Check window heights and set scrolling */ 238 if (m->h < m->numopts + exitadd) { 239 if (!(m->mopt & SCROLL) || m->h < 3) { 240 endwin(); 241 (void) fprintf (stderr, 242 "Window too small for menu \"%s\"\n", 243 m->title); 244 exit(1); 245 } 246 } else 247 m->mopt &= ~SCROLL; 248 249 /* check for screen fit */ 250 if (m->y + m->h + add > max_lines) { 251 endwin(); 252 (void) fprintf (stderr, 253 "Screen too small for menu \"%s\"\n", m->title); 254 exit(1); 255 256 } 257 258 /* Calculate w? */ 259 if (m->w == 0) { 260 p = m->opts; 261 if (m->mopt & SCROLL) 262 max = strlen(scrolltext); 263 while (*p) { 264 max = MAX(max,strlen(*p)); 265 p++; 266 } 267 m->w = max; 268 } 269 270 /* Get the windows. */ 271 m->mw = newwin(m->h+add, m->w+add, m->y, m->x); 272 273 if (m->mw == NULL) { 274 endwin(); 275 (void) fprintf (stderr, 276 "Could not create window for window with title " 277 " \"%s\"\n", m->title); 278 exit(1); 279 } 280} 281 282static void post_menu (struct menudesc *m) 283{ 284 int i; 285 int hasbox, cury, maxy, selrow, lastopt; 286 int tadd; 287 288 if (m->mopt & NOBOX) { 289 cury = 0; 290 maxy = m->h; 291 hasbox = 0; 292 } else { 293 cury = 1; 294 maxy = m->h+1; 295 hasbox = 1; 296 } 297 298 /* Clear the window */ 299 wclear (m->mw); 300 301 tadd = strlen(m->title) ? 2 : 0; 302 303 if (tadd) { 304 mvwaddstr(m->mw, cury, cury, m->title); 305 cury += 2; 306 maxy += 2; 307 } 308 309 /* Set defaults, calculate lastopt. */ 310 selrow = -1; 311 if (m->mopt & SCROLL) { 312 lastopt = MIN(m->numopts, m->topline+m->h-1); 313 maxy -= 1; 314 } else 315 lastopt = m->numopts; 316 317 for (i=m->topline; i<lastopt; i++, cury++) { 318 if (m->cursel == i) { 319 mvwaddstr (m->mw, cury, hasbox, ">"); 320 wstandout(m->mw); 321 selrow = cury; 322 } else 323 mvwaddstr (m->mw, cury, hasbox, " "); 324 waddstr (m->mw, m->opts[i]); 325 if (m->cursel == i) 326 wstandend(m->mw); 327 } 328 329 /* Add the exit option. */ 330 if (!(m->mopt & NOEXITOPT) && cury < maxy) { 331 if (m->cursel >= m->numopts) { 332 mvwaddstr (m->mw, cury, hasbox, ">"); 333 wstandout(m->mw); 334 selrow = cury; 335 } else 336 mvwaddstr (m->mw, cury, hasbox, " "); 337 waddstr (m->mw, "x: Exit"); 338 if (m->cursel >= m->numopts) 339 wstandend(m->mw); 340 cury++; 341 } 342 343 /* Add the scroll line */ 344 if (m->mopt & SCROLL) { 345 mvwaddstr (m->mw, cury, hasbox, scrolltext); 346 if (selrow < 0) 347 selrow = cury; 348 } 349 350 /* Add the box. */ 351 if (!(m->mopt & NOBOX)) 352 box(m->mw, '*', '*'); 353 354 wmove(m->mw, selrow, hasbox); 355} 356 357static void process_help (struct menudesc *m, int num) 358{ 359 char *help = m->helpstr; 360 int lineoff = 0; 361 int curoff = 0; 362 int again; 363 int winin; 364 365 /* Is there help? */ 366 if (!help) { 367 mbeep(); 368 return; 369 } 370 371 /* Display the help information. */ 372 do { 373 if (lineoff < curoff) { 374 help = m->helpstr; 375 curoff = 0; 376 } 377 while (*help && curoff < lineoff) { 378 if (*help == '\n') 379 curoff++; 380 help++; 381 } 382 383 wclear(stdscr); 384 mvwaddstr (stdscr, 0, 0, 385 "Help: exit: x, page up: u <, page down: d >"); 386 mvwaddstr (stdscr, 2, 0, help); 387 wmove (stdscr, 1, 0); 388 wrefresh(stdscr); 389 390 do { 391 winin = mgetch(stdscr); 392 if (winin < KEYSEQ_FIRST) 393 winin = tolower(winin); 394 again = 0; 395 switch (winin) { 396 case '<': 397 case 'u': 398 case KEYSEQ_UP_ARROW: 399 case KEYSEQ_LEFT_ARROW: 400 case KEYSEQ_PAGE_UP: 401 if (lineoff) 402 lineoff -= max_lines - 2; 403 else 404 again = 1; 405 break; 406 case '>': 407 case 'd': 408 case KEYSEQ_DOWN_ARROW: 409 case KEYSEQ_RIGHT_ARROW: 410 case KEYSEQ_PAGE_DOWN: 411 if (*help) 412 lineoff += max_lines - 2; 413 else 414 again = 1; 415 break; 416 case 'q': 417 break; 418 case 'x': 419 winin = 'q'; 420 break; 421 default: 422 again = 1; 423 } 424 if (again) 425 mbeep(); 426 } while (again); 427 } while (winin != 'q'); 428 429 /* Restore current menu */ 430 wclear(stdscr); 431 wrefresh(stdscr); 432 process_item (&num, -2); 433} 434 435static void process_req (struct menudesc *m, int num, int req) 436{ 437 int ch; 438 int hasexit = (m->mopt & NOEXITOPT ? 0 : 1 ); 439 int refresh = 0; 440 int scroll_sel = 0; 441 442 if (req == REQ_EXECUTE) 443 return; 444 445 else if (req == REQ_NEXT_ITEM) { 446 if (m->cursel < m->numopts + hasexit - 1) { 447 m->cursel++; 448 scroll_sel = 1; 449 refresh = 1; 450 if (m->cursel >= m->topline + m->h -1 ) 451 m->topline += 1; 452 } else 453 mbeep(); 454 455 } else if (req == REQ_PREV_ITEM) { 456 if (m->cursel > 0) { 457 m->cursel--; 458 scroll_sel = 1; 459 refresh = 1; 460 if (m->cursel < m->topline ) 461 m->topline -= 1; 462 } else 463 mbeep(); 464 465 } else if (req == REQ_REDISPLAY) { 466 wclear(stdscr); 467 wrefresh(stdscr); 468 process_item (&num, -2); 469 refresh = 1; 470 471 } else if (req == REQ_HELP) { 472 process_help (m, num); 473 refresh = 1; 474 475 } else if (req == REQ_SCROLLUP) { 476 if (!(m->mopt & SCROLL)) 477 mbeep(); 478 else if (m->topline == 0) 479 mbeep(); 480 else { 481 m->topline -= m->h-1; 482 if (m->topline < 0) 483 m->topline = 0; 484 wclear (m->mw); 485 refresh = 1; 486 } 487 488 } else if (req == REQ_SCROLLDOWN) { 489 if (!(m->mopt & SCROLL)) 490 mbeep(); 491 else if (m->topline + m->h - 1 > m->numopts + hasexit) 492 mbeep(); 493 else { 494 m->topline += m->h-1; 495 wclear (m->mw); 496 refresh = 1; 497 } 498 499 } else { 500 ch = req; 501 if (ch == 'x' && hasexit) { 502 m->cursel = m->numopts; 503 scroll_sel = 1; 504 refresh = 1; 505 } else { 506 if (ch > 'z') 507 ch = 255; 508 if (ch >= 'a') { 509 if (ch > 'x') ch--; 510 ch = ch - 'a'; 511 } else 512 ch = 25 + ch - 'A'; 513 if (ch < 0 || ch >= m->numopts) 514 mbeep(); 515 else { 516 m->cursel = ch; 517 scroll_sel = 1; 518 refresh = 1; 519 } 520 } 521 } 522 523 if (m->mopt & SCROLL && scroll_sel) { 524 while (m->cursel >= m->topline + m->h -1 ) 525 m->topline += m->h -1; 526 while (m->cursel < m->topline) 527 m->topline -= m->h -1; 528 } 529 530 if (refresh) { 531 post_menu (m); 532 wrefresh (m->mw); 533 } 534} 535 536void process_menu (int num) 537{ 538 int sel = 0; 539 int req, done; 540 int last_num; 541 542 struct menudesc *m = &menus[num]; 543 544 done = FALSE; 545 546 /* Initialize? */ 547 if (!__menu_init) { 548 if (initscr() == NULL) { 549 __menu_initerror(); 550 return; 551 } 552 cbreak(); 553 noecho(); 554 max_lines = stdscr->maxy; 555 init_keyseq(); 556 __menu_init = 1; 557 } 558 if (__m_endwin) { 559 wclear(stdscr); 560 wrefresh(stdscr); 561 __m_endwin = 0; 562 } 563 if (m->mw == NULL) 564 init_menu (m); 565 566 /* Always preselect option 0 and display from 0! */ 567 m->cursel = 0; 568 m->topline = 0; 569 570 while (!done) { 571 last_num = num; 572 if (__m_endwin) { 573 wclear(stdscr); 574 wrefresh(stdscr); 575 __m_endwin = 0; 576 } 577 /* Process the display action */ 578 process_item (&num, -2); 579 post_menu (m); 580 wrefresh (m->mw); 581 582 while ((req = menucmd (m->mw)) != REQ_EXECUTE) 583 process_req (m, num, req); 584 585 sel = m->cursel; 586 wclear (m->mw); 587 wrefresh (m->mw); 588 589 /* Process the items */ 590 if (sel < m->numopts) 591 done = process_item (&num, sel); 592 else 593 done = TRUE; 594 595 /* Reselect m just in case */ 596 if (num != last_num) { 597 m = &menus[num]; 598 /* Initialize? */ 599 if (m->mw == NULL) 600 init_menu (m); 601 process_item (&num, -2); 602 } 603 } 604 605 /* Process the exit action */ 606 process_item (&num, -1); 607} 608 609