1 /* $FreeBSD$ */ 2 /* 3 * Copyright (C) 1984-2000 Mark Nudelman 4 * 5 * You may distribute under the terms of either the GNU General Public 6 * License or the Less License, as specified in the README file. 7 * 8 * For more information about less, or for information on how to 9 * contact the author, see the README file. 10 */ 11 12 13 /* 14 * Routines which deal with the characteristics of the terminal. 15 * Uses termcap to be as terminal-independent as possible. 16 */ 17 18 #include "less.h" 19 #include "cmd.h" 20 21 #if MSDOS_COMPILER 22 #include "pckeys.h" 23 #if MSDOS_COMPILER==MSOFTC 24 #include <graph.h> 25 #else 26 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 27 #include <conio.h> 28 #if MSDOS_COMPILER==DJGPPC 29 #include <pc.h> 30 extern int fd0; 31 #endif 32 #else 33 #if MSDOS_COMPILER==WIN32C 34 #include <windows.h> 35 #endif 36 #endif 37 #endif 38 #include <time.h> 39 40 #else 41 42 #if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS 43 #include <termios.h> 44 #if HAVE_SYS_IOCTL_H && !defined(TIOCGWINSZ) 45 #include <sys/ioctl.h> 46 #endif 47 #else 48 #if HAVE_TERMIO_H 49 #include <termio.h> 50 #else 51 #if HAVE_SGSTAT_H 52 #include <sgstat.h> 53 #else 54 #include <sgtty.h> 55 #endif 56 #if HAVE_SYS_IOCTL_H && (defined(TIOCGWINSZ) || defined(TCGETA) || defined(TIOCGETP) || defined(WIOCGETD)) 57 #include <sys/ioctl.h> 58 #endif 59 #endif 60 #endif 61 62 #if HAVE_TERMCAP_H 63 #include <termcap.h> 64 #endif 65 #ifdef _OSK 66 #include <signal.h> 67 #endif 68 #if OS2 69 #include <sys/signal.h> 70 #include "pckeys.h" 71 #endif 72 #if HAVE_SYS_STREAM_H 73 #include <sys/stream.h> 74 #endif 75 #if HAVE_SYS_PTEM_H 76 #include <sys/ptem.h> 77 #endif 78 79 #endif /* MSDOS_COMPILER */ 80 81 /* 82 * Check for broken termios package that forces you to manually 83 * set the line discipline. 84 */ 85 #ifdef __ultrix__ 86 #define MUST_SET_LINE_DISCIPLINE 1 87 #else 88 #define MUST_SET_LINE_DISCIPLINE 0 89 #endif 90 91 #if OS2 92 #define DEFAULT_TERM "ansi" 93 static char *windowid; 94 #else 95 #define DEFAULT_TERM "unknown" 96 #endif 97 98 #if MSDOS_COMPILER==MSOFTC 99 static int videopages; 100 static long msec_loops; 101 static int flash_created = 0; 102 #define SETCOLORS(fg,bg) { _settextcolor(fg); _setbkcolor(bg); } 103 #endif 104 105 #if MSDOS_COMPILER==BORLANDC 106 static unsigned short *whitescreen; 107 static int flash_created = 0; 108 #endif 109 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 110 #define _settextposition(y,x) gotoxy(x,y) 111 #define _clearscreen(m) clrscr() 112 #define _outtext(s) cputs(s) 113 #define SETCOLORS(fg,bg) { textcolor(fg); textbackground(bg); } 114 extern int sc_height; 115 #endif 116 117 #if MSDOS_COMPILER==WIN32C 118 struct keyRecord 119 { 120 int ascii; 121 int scan; 122 } currentKey; 123 124 static int keyCount = 0; 125 static WORD curr_attr; 126 static int pending_scancode = 0; 127 static WORD *whitescreen; 128 129 static HANDLE con_out_save = INVALID_HANDLE_VALUE; /* previous console */ 130 static HANDLE con_out_ours = INVALID_HANDLE_VALUE; /* our own */ 131 HANDLE con_out = INVALID_HANDLE_VALUE; /* current console */ 132 133 extern int quitting; 134 static void win32_init_term(); 135 static void win32_deinit_term(); 136 137 #define FG_COLORS (FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_INTENSITY) 138 #define BG_COLORS (BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE | BACKGROUND_INTENSITY) 139 #define MAKEATTR(fg,bg) ((WORD)((fg)|((bg)<<4))) 140 #define SETCOLORS(fg,bg) { curr_attr = MAKEATTR(fg,bg); \ 141 if (SetConsoleTextAttribute(con_out, curr_attr) == 0) \ 142 error("SETCOLORS failed"); } 143 #endif 144 145 #if MSDOS_COMPILER 146 public int nm_fg_color; /* Color of normal text */ 147 public int nm_bg_color; 148 public int bo_fg_color; /* Color of bold text */ 149 public int bo_bg_color; 150 public int ul_fg_color; /* Color of underlined text */ 151 public int ul_bg_color; 152 public int so_fg_color; /* Color of standout text */ 153 public int so_bg_color; 154 public int bl_fg_color; /* Color of blinking text */ 155 public int bl_bg_color; 156 static int sy_fg_color; /* Color of system text (before less) */ 157 static int sy_bg_color; 158 159 #else 160 161 /* 162 * Strings passed to tputs() to do various terminal functions. 163 */ 164 static char 165 *sc_pad, /* Pad string */ 166 *sc_home, /* Cursor home */ 167 *sc_addline, /* Add line, scroll down following lines */ 168 *sc_lower_left, /* Cursor to last line, first column */ 169 *sc_move, /* General cursor positioning */ 170 *sc_clear, /* Clear screen */ 171 *sc_eol_clear, /* Clear to end of line */ 172 *sc_eos_clear, /* Clear to end of screen */ 173 *sc_s_in, /* Enter standout (highlighted) mode */ 174 *sc_s_out, /* Exit standout mode */ 175 *sc_u_in, /* Enter underline mode */ 176 *sc_u_out, /* Exit underline mode */ 177 *sc_b_in, /* Enter bold mode */ 178 *sc_b_out, /* Exit bold mode */ 179 *sc_bl_in, /* Enter blink mode */ 180 *sc_bl_out, /* Exit blink mode */ 181 *sc_visual_bell, /* Visual bell (flash screen) sequence */ 182 *sc_backspace, /* Backspace cursor */ 183 *sc_s_keypad, /* Start keypad mode */ 184 *sc_e_keypad, /* End keypad mode */ 185 *sc_init, /* Startup terminal initialization */ 186 *sc_deinit; /* Exit terminal de-initialization */ 187 #endif 188 189 static int init_done = 0; 190 191 public int auto_wrap; /* Terminal does \r\n when write past margin */ 192 public int ignaw; /* Terminal ignores \n immediately after wrap */ 193 public int erase_char, kill_char; /* The user's erase and line-kill chars */ 194 public int werase_char; /* The user's word-erase char */ 195 public int sc_width, sc_height; /* Height & width of screen */ 196 public int bo_s_width, bo_e_width; /* Printing width of boldface seq */ 197 public int ul_s_width, ul_e_width; /* Printing width of underline seq */ 198 public int so_s_width, so_e_width; /* Printing width of standout seq */ 199 public int bl_s_width, bl_e_width; /* Printing width of blink seq */ 200 public int above_mem, below_mem; /* Memory retained above/below screen */ 201 public int can_goto_line; /* Can move cursor to any line */ 202 public int clear_bg; /* Clear fills with background color */ 203 public int missing_cap = 0; /* Some capability is missing */ 204 205 static int attrmode = AT_NORMAL; 206 207 #if !MSDOS_COMPILER 208 static char *cheaper(); 209 static void tmodes(); 210 #endif 211 212 /* 213 * These two variables are sometimes defined in, 214 * and needed by, the termcap library. 215 */ 216 #if MUST_DEFINE_OSPEED 217 extern short ospeed; /* Terminal output baud rate */ 218 extern char PC; /* Pad character */ 219 #endif 220 #ifdef _OSK 221 short ospeed; 222 char PC_, *UP, *BC; 223 #endif 224 225 extern int quiet; /* If VERY_QUIET, use visual bell for bell */ 226 extern int no_back_scroll; 227 extern int swindow; 228 extern int no_init; 229 extern int quit_at_eof; 230 extern int more_mode; 231 extern int no_keypad; 232 extern int sigs; 233 extern int wscroll; 234 extern int screen_trashed; 235 #if HILITE_SEARCH 236 extern int hilite_search; 237 #endif 238 239 extern char *tgetstr(); 240 extern char *tgoto(); 241 242 243 /* 244 * Change terminal to "raw mode", or restore to "normal" mode. 245 * "Raw mode" means 246 * 1. An outstanding read will complete on receipt of a single keystroke. 247 * 2. Input is not echoed. 248 * 3. On output, \n is mapped to \r\n. 249 * 4. \t is NOT expanded into spaces. 250 * 5. Signal-causing characters such as ctrl-C (interrupt), 251 * etc. are NOT disabled. 252 * It doesn't matter whether an input \n is mapped to \r, or vice versa. 253 */ 254 public void 255 raw_mode(on) 256 int on; 257 { 258 static int curr_on = 0; 259 260 if (on == curr_on) 261 return; 262 #if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS 263 { 264 struct termios s; 265 static struct termios save_term; 266 static int saved_term = 0; 267 268 if (on) 269 { 270 /* 271 * Get terminal modes. 272 */ 273 tcgetattr(2, &s); 274 275 /* 276 * Save modes and set certain variables dependent on modes. 277 */ 278 if (!saved_term) 279 { 280 save_term = s; 281 saved_term = 1; 282 } 283 #if HAVE_OSPEED 284 switch (cfgetospeed(&s)) 285 { 286 #ifdef B0 287 case B0: ospeed = 0; break; 288 #endif 289 #ifdef B50 290 case B50: ospeed = 1; break; 291 #endif 292 #ifdef B75 293 case B75: ospeed = 2; break; 294 #endif 295 #ifdef B110 296 case B110: ospeed = 3; break; 297 #endif 298 #ifdef B134 299 case B134: ospeed = 4; break; 300 #endif 301 #ifdef B150 302 case B150: ospeed = 5; break; 303 #endif 304 #ifdef B200 305 case B200: ospeed = 6; break; 306 #endif 307 #ifdef B300 308 case B300: ospeed = 7; break; 309 #endif 310 #ifdef B600 311 case B600: ospeed = 8; break; 312 #endif 313 #ifdef B1200 314 case B1200: ospeed = 9; break; 315 #endif 316 #ifdef B1800 317 case B1800: ospeed = 10; break; 318 #endif 319 #ifdef B2400 320 case B2400: ospeed = 11; break; 321 #endif 322 #ifdef B4800 323 case B4800: ospeed = 12; break; 324 #endif 325 #ifdef B9600 326 case B9600: ospeed = 13; break; 327 #endif 328 #ifdef EXTA 329 case EXTA: ospeed = 14; break; 330 #endif 331 #ifdef EXTB 332 case EXTB: ospeed = 15; break; 333 #endif 334 #ifdef B57600 335 case B57600: ospeed = 16; break; 336 #endif 337 #ifdef B115200 338 case B115200: ospeed = 17; break; 339 #endif 340 default: ; 341 } 342 #endif 343 erase_char = s.c_cc[VERASE]; 344 kill_char = s.c_cc[VKILL]; 345 #ifdef VWERASE 346 werase_char = s.c_cc[VWERASE]; 347 #else 348 werase_char = CONTROL('W'); 349 #endif 350 351 /* 352 * Set the modes to the way we want them. 353 */ 354 s.c_lflag &= ~(0 355 #ifdef ICANON 356 | ICANON 357 #endif 358 #ifdef ECHO 359 | ECHO 360 #endif 361 #ifdef ECHOE 362 | ECHOE 363 #endif 364 #ifdef ECHOK 365 | ECHOK 366 #endif 367 #if ECHONL 368 | ECHONL 369 #endif 370 ); 371 372 s.c_oflag |= (0 373 #ifdef OXTABS 374 | OXTABS 375 #else 376 #ifdef TAB3 377 | TAB3 378 #else 379 #ifdef XTABS 380 | XTABS 381 #endif 382 #endif 383 #endif 384 #ifdef OPOST 385 | OPOST 386 #endif 387 #ifdef ONLCR 388 | ONLCR 389 #endif 390 ); 391 392 s.c_oflag &= ~(0 393 #ifdef ONOEOT 394 | ONOEOT 395 #endif 396 #ifdef OCRNL 397 | OCRNL 398 #endif 399 #ifdef ONOCR 400 | ONOCR 401 #endif 402 #ifdef ONLRET 403 | ONLRET 404 #endif 405 ); 406 s.c_cc[VMIN] = 1; 407 s.c_cc[VTIME] = 0; 408 #ifdef VLNEXT 409 s.c_cc[VLNEXT] = 0; 410 #endif 411 #ifdef VDSUSP 412 s.c_cc[VDSUSP] = 0; 413 #endif 414 #if MUST_SET_LINE_DISCIPLINE 415 /* 416 * System's termios is broken; need to explicitly 417 * request TERMIODISC line discipline. 418 */ 419 s.c_line = TERMIODISC; 420 #endif 421 } else 422 { 423 /* 424 * Restore saved modes. 425 */ 426 s = save_term; 427 } 428 #if HAVE_FSYNC 429 fsync(2); 430 #endif 431 tcsetattr(2, TCSADRAIN, &s); 432 #if MUST_SET_LINE_DISCIPLINE 433 if (!on) 434 { 435 /* 436 * Broken termios *ignores* any line discipline 437 * except TERMIODISC. A different old line discipline 438 * is therefore not restored, yet. Restore the old 439 * line discipline by hand. 440 */ 441 ioctl(2, TIOCSETD, &save_term.c_line); 442 } 443 #endif 444 } 445 #else 446 #ifdef TCGETA 447 { 448 struct termio s; 449 static struct termio save_term; 450 static int saved_term = 0; 451 452 if (on) 453 { 454 /* 455 * Get terminal modes. 456 */ 457 ioctl(2, TCGETA, &s); 458 459 /* 460 * Save modes and set certain variables dependent on modes. 461 */ 462 if (!saved_term) 463 { 464 save_term = s; 465 saved_term = 1; 466 } 467 #if HAVE_OSPEED 468 ospeed = s.c_cflag & CBAUD; 469 #endif 470 erase_char = s.c_cc[VERASE]; 471 kill_char = s.c_cc[VKILL]; 472 #ifdef VWERASE 473 werase_char = s.c_cc[VWERASE]; 474 #else 475 werase_char = CONTROL('W'); 476 #endif 477 478 /* 479 * Set the modes to the way we want them. 480 */ 481 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); 482 s.c_oflag |= (OPOST|ONLCR|TAB3); 483 s.c_oflag &= ~(OCRNL|ONOCR|ONLRET); 484 s.c_cc[VMIN] = 1; 485 s.c_cc[VTIME] = 0; 486 } else 487 { 488 /* 489 * Restore saved modes. 490 */ 491 s = save_term; 492 } 493 ioctl(2, TCSETAW, &s); 494 } 495 #else 496 #ifdef TIOCGETP 497 { 498 struct sgttyb s; 499 static struct sgttyb save_term; 500 static int saved_term = 0; 501 502 if (on) 503 { 504 /* 505 * Get terminal modes. 506 */ 507 ioctl(2, TIOCGETP, &s); 508 509 /* 510 * Save modes and set certain variables dependent on modes. 511 */ 512 if (!saved_term) 513 { 514 save_term = s; 515 saved_term = 1; 516 } 517 #if HAVE_OSPEED 518 ospeed = s.sg_ospeed; 519 #endif 520 erase_char = s.sg_erase; 521 kill_char = s.sg_kill; 522 werase_char = CONTROL('W'); 523 524 /* 525 * Set the modes to the way we want them. 526 */ 527 s.sg_flags |= CBREAK; 528 s.sg_flags &= ~(ECHO|XTABS); 529 } else 530 { 531 /* 532 * Restore saved modes. 533 */ 534 s = save_term; 535 } 536 ioctl(2, TIOCSETN, &s); 537 } 538 #else 539 #ifdef _OSK 540 { 541 struct sgbuf s; 542 static struct sgbuf save_term; 543 static int saved_term = 0; 544 545 if (on) 546 { 547 /* 548 * Get terminal modes. 549 */ 550 _gs_opt(2, &s); 551 552 /* 553 * Save modes and set certain variables dependent on modes. 554 */ 555 if (!saved_term) 556 { 557 save_term = s; 558 saved_term = 1; 559 } 560 erase_char = s.sg_bspch; 561 kill_char = s.sg_dlnch; 562 werase_char = CONTROL('W'); 563 564 /* 565 * Set the modes to the way we want them. 566 */ 567 s.sg_echo = 0; 568 s.sg_eofch = 0; 569 s.sg_pause = 0; 570 s.sg_psch = 0; 571 } else 572 { 573 /* 574 * Restore saved modes. 575 */ 576 s = save_term; 577 } 578 _ss_opt(2, &s); 579 } 580 #else 581 /* MS-DOS, Windows, or OS2 */ 582 #if OS2 583 /* OS2 */ 584 LSIGNAL(SIGINT, SIG_IGN); 585 #endif 586 erase_char = '\b'; 587 #if MSDOS_COMPILER==DJGPPC 588 kill_char = CONTROL('U'); 589 /* 590 * So that when we shell out or run another program, its 591 * stdin is in cooked mode. We do not switch stdin to binary 592 * mode if fd0 is zero, since that means we were called before 593 * tty was reopened in open_getchr, in which case we would be 594 * changing the original stdin device outside less. 595 */ 596 if (fd0 != 0) 597 setmode(0, on ? O_BINARY : O_TEXT); 598 #else 599 kill_char = ESC; 600 #endif 601 werase_char = CONTROL('W'); 602 #endif 603 #endif 604 #endif 605 #endif 606 curr_on = on; 607 } 608 609 #if !MSDOS_COMPILER 610 /* 611 * Some glue to prevent calling termcap functions if tgetent() failed. 612 */ 613 static int hardcopy; 614 615 static char * 616 ltget_env(capname) 617 char *capname; 618 { 619 char name[16]; 620 621 strcpy(name, "LESS_TERMCAP_"); 622 strcat(name, capname); 623 return (lgetenv(name)); 624 } 625 626 static int 627 ltgetflag(capname) 628 char *capname; 629 { 630 char *s; 631 632 if ((s = ltget_env(capname)) != NULL) 633 return (*s != '\0' && *s != '0'); 634 if (hardcopy) 635 return (0); 636 return (tgetflag(capname)); 637 } 638 639 static int 640 ltgetnum(capname) 641 char *capname; 642 { 643 char *s; 644 645 if ((s = ltget_env(capname)) != NULL) 646 return (atoi(s)); 647 if (hardcopy) 648 return (-1); 649 return (tgetnum(capname)); 650 } 651 652 static char * 653 ltgetstr(capname, pp) 654 char *capname; 655 char **pp; 656 { 657 char *s; 658 659 if ((s = ltget_env(capname)) != NULL) 660 return (s); 661 if (hardcopy) 662 return (NULL); 663 return (tgetstr(capname, pp)); 664 } 665 #endif /* MSDOS_COMPILER */ 666 667 /* 668 * Get size of the output screen. 669 */ 670 public void 671 scrsize() 672 { 673 register char *s; 674 int sys_height; 675 int sys_width; 676 #if !MSDOS_COMPILER 677 int n; 678 #endif 679 680 #define DEF_SC_WIDTH 80 681 #if MSDOS_COMPILER 682 #define DEF_SC_HEIGHT 25 683 #else 684 #define DEF_SC_HEIGHT 24 685 #endif 686 687 688 sys_width = sys_height = 0; 689 690 #if MSDOS_COMPILER==MSOFTC 691 { 692 struct videoconfig w; 693 _getvideoconfig(&w); 694 sys_height = w.numtextrows; 695 sys_width = w.numtextcols; 696 } 697 #else 698 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 699 { 700 struct text_info w; 701 gettextinfo(&w); 702 sys_height = w.screenheight; 703 sys_width = w.screenwidth; 704 } 705 #else 706 #if MSDOS_COMPILER==WIN32C 707 { 708 CONSOLE_SCREEN_BUFFER_INFO scr; 709 GetConsoleScreenBufferInfo(con_out, &scr); 710 sys_height = scr.srWindow.Bottom - scr.srWindow.Top + 1; 711 sys_width = scr.srWindow.Right - scr.srWindow.Left + 1; 712 } 713 #else 714 #if OS2 715 { 716 int s[2]; 717 _scrsize(s); 718 sys_width = s[0]; 719 sys_height = s[1]; 720 /* 721 * When using terminal emulators for XFree86/OS2, the 722 * _scrsize function does not work well. 723 * Call the scrsize.exe program to get the window size. 724 */ 725 windowid = getenv("WINDOWID"); 726 if (windowid != NULL) 727 { 728 FILE *fd = popen("scrsize", "rt"); 729 if (fd != NULL) 730 { 731 int w, h; 732 fscanf(fd, "%i %i", &w, &h); 733 if (w > 0 && h > 0) 734 { 735 sys_width = w; 736 sys_height = h; 737 } 738 pclose(fd); 739 } 740 } 741 } 742 #else 743 #ifdef TIOCGWINSZ 744 { 745 struct winsize w; 746 if (ioctl(2, TIOCGWINSZ, &w) == 0) 747 { 748 if (w.ws_row > 0) 749 sys_height = w.ws_row; 750 if (w.ws_col > 0) 751 sys_width = w.ws_col; 752 } 753 } 754 #else 755 #ifdef WIOCGETD 756 { 757 struct uwdata w; 758 if (ioctl(2, WIOCGETD, &w) == 0) 759 { 760 if (w.uw_height > 0) 761 sys_height = w.uw_height / w.uw_vs; 762 if (w.uw_width > 0) 763 sys_width = w.uw_width / w.uw_hs; 764 } 765 } 766 #endif 767 #endif 768 #endif 769 #endif 770 #endif 771 #endif 772 773 if (sys_height > 0) 774 sc_height = sys_height; 775 else if ((s = lgetenv("LINES")) != NULL) 776 sc_height = atoi(s); 777 #if !MSDOS_COMPILER 778 else if ((n = ltgetnum("li")) > 0) 779 sc_height = n; 780 #endif 781 else 782 sc_height = DEF_SC_HEIGHT; 783 784 if (sys_width > 0) 785 sc_width = sys_width; 786 else if ((s = lgetenv("COLUMNS")) != NULL) 787 sc_width = atoi(s); 788 #if !MSDOS_COMPILER 789 else if ((n = ltgetnum("co")) > 0) 790 sc_width = n; 791 #endif 792 else 793 sc_width = DEF_SC_WIDTH; 794 } 795 796 #if MSDOS_COMPILER==MSOFTC 797 /* 798 * Figure out how many empty loops it takes to delay a millisecond. 799 */ 800 static void 801 get_clock() 802 { 803 clock_t start; 804 805 /* 806 * Get synchronized at the start of a tick. 807 */ 808 start = clock(); 809 while (clock() == start) 810 ; 811 /* 812 * Now count loops till the next tick. 813 */ 814 start = clock(); 815 msec_loops = 0; 816 while (clock() == start) 817 msec_loops++; 818 /* 819 * Convert from (loops per clock) to (loops per millisecond). 820 */ 821 msec_loops *= CLOCKS_PER_SEC; 822 msec_loops /= 1000; 823 } 824 825 /* 826 * Delay for a specified number of milliseconds. 827 */ 828 static void 829 dummy_func() 830 { 831 static long delay_dummy = 0; 832 delay_dummy++; 833 } 834 835 static void 836 delay(msec) 837 int msec; 838 { 839 long i; 840 841 while (msec-- > 0) 842 { 843 for (i = 0; i < msec_loops; i++) 844 { 845 /* 846 * Make it look like we're doing something here, 847 * so the optimizer doesn't remove the whole loop. 848 */ 849 dummy_func(); 850 } 851 } 852 } 853 #endif 854 855 /* 856 * Return the characters actually input by a "special" key. 857 */ 858 public char * 859 special_key_str(key) 860 int key; 861 { 862 static char tbuf[40]; 863 char *s; 864 #if MSDOS_COMPILER || OS2 865 static char k_right[] = { '\340', PCK_RIGHT, 0 }; 866 static char k_left[] = { '\340', PCK_LEFT, 0 }; 867 static char k_ctl_right[] = { '\340', PCK_CTL_RIGHT, 0 }; 868 static char k_ctl_left[] = { '\340', PCK_CTL_LEFT, 0 }; 869 static char k_insert[] = { '\340', PCK_INSERT, 0 }; 870 static char k_delete[] = { '\340', PCK_DELETE, 0 }; 871 static char k_ctl_delete[] = { '\340', PCK_CTL_DELETE, 0 }; 872 static char k_ctl_backspace[] = { '\177', 0 }; 873 static char k_home[] = { '\340', PCK_HOME, 0 }; 874 static char k_end[] = { '\340', PCK_END, 0 }; 875 static char k_up[] = { '\340', PCK_UP, 0 }; 876 static char k_down[] = { '\340', PCK_DOWN, 0 }; 877 static char k_backtab[] = { '\340', PCK_SHIFT_TAB, 0 }; 878 static char k_pagedown[] = { '\340', PCK_PAGEDOWN, 0 }; 879 static char k_pageup[] = { '\340', PCK_PAGEUP, 0 }; 880 static char k_f1[] = { '\340', PCK_F1, 0 }; 881 #endif 882 #if !MSDOS_COMPILER 883 char *sp = tbuf; 884 #endif 885 886 switch (key) 887 { 888 #if OS2 889 /* 890 * If windowid is not NULL, assume less is executed in 891 * the XFree86 environment. 892 */ 893 case SK_RIGHT_ARROW: 894 s = windowid ? ltgetstr("kr", &sp) : k_right; 895 break; 896 case SK_LEFT_ARROW: 897 s = windowid ? ltgetstr("kl", &sp) : k_left; 898 break; 899 case SK_UP_ARROW: 900 s = windowid ? ltgetstr("ku", &sp) : k_up; 901 break; 902 case SK_DOWN_ARROW: 903 s = windowid ? ltgetstr("kd", &sp) : k_down; 904 break; 905 case SK_PAGE_UP: 906 s = windowid ? ltgetstr("kP", &sp) : k_pageup; 907 break; 908 case SK_PAGE_DOWN: 909 s = windowid ? ltgetstr("kN", &sp) : k_pagedown; 910 break; 911 case SK_HOME: 912 s = windowid ? ltgetstr("kh", &sp) : k_home; 913 break; 914 case SK_END: 915 s = windowid ? ltgetstr("@7", &sp) : k_end; 916 break; 917 case SK_DELETE: 918 if (windowid) 919 { 920 s = ltgetstr("kD", &sp); 921 if (s == NULL) 922 { 923 tbuf[0] = '\177'; 924 tbuf[1] = '\0'; 925 s = tbuf; 926 } 927 } else 928 s = k_delete; 929 break; 930 #endif 931 #if MSDOS_COMPILER 932 case SK_RIGHT_ARROW: 933 s = k_right; 934 break; 935 case SK_LEFT_ARROW: 936 s = k_left; 937 break; 938 case SK_UP_ARROW: 939 s = k_up; 940 break; 941 case SK_DOWN_ARROW: 942 s = k_down; 943 break; 944 case SK_PAGE_UP: 945 s = k_pageup; 946 break; 947 case SK_PAGE_DOWN: 948 s = k_pagedown; 949 break; 950 case SK_HOME: 951 s = k_home; 952 break; 953 case SK_END: 954 s = k_end; 955 break; 956 case SK_DELETE: 957 s = k_delete; 958 break; 959 #endif 960 #if MSDOS_COMPILER || OS2 961 case SK_INSERT: 962 s = k_insert; 963 break; 964 case SK_CTL_LEFT_ARROW: 965 s = k_ctl_left; 966 break; 967 case SK_CTL_RIGHT_ARROW: 968 s = k_ctl_right; 969 break; 970 case SK_CTL_BACKSPACE: 971 s = k_ctl_backspace; 972 break; 973 case SK_CTL_DELETE: 974 s = k_ctl_delete; 975 break; 976 case SK_F1: 977 s = k_f1; 978 break; 979 case SK_BACKTAB: 980 s = k_backtab; 981 break; 982 #else 983 case SK_RIGHT_ARROW: 984 s = ltgetstr("kr", &sp); 985 break; 986 case SK_LEFT_ARROW: 987 s = ltgetstr("kl", &sp); 988 break; 989 case SK_UP_ARROW: 990 s = ltgetstr("ku", &sp); 991 break; 992 case SK_DOWN_ARROW: 993 s = ltgetstr("kd", &sp); 994 break; 995 case SK_PAGE_UP: 996 s = ltgetstr("kP", &sp); 997 break; 998 case SK_PAGE_DOWN: 999 s = ltgetstr("kN", &sp); 1000 break; 1001 case SK_HOME: 1002 s = ltgetstr("kh", &sp); 1003 break; 1004 case SK_END: 1005 s = ltgetstr("@7", &sp); 1006 break; 1007 case SK_DELETE: 1008 s = ltgetstr("kD", &sp); 1009 if (s == NULL) 1010 { 1011 tbuf[0] = '\177'; 1012 tbuf[1] = '\0'; 1013 s = tbuf; 1014 } 1015 break; 1016 #endif 1017 case SK_CONTROL_K: 1018 tbuf[0] = CONTROL('K'); 1019 tbuf[1] = '\0'; 1020 s = tbuf; 1021 break; 1022 default: 1023 return (NULL); 1024 } 1025 return (s); 1026 } 1027 1028 /* 1029 * Get terminal capabilities via termcap. 1030 */ 1031 public void 1032 get_term() 1033 { 1034 #if MSDOS_COMPILER 1035 auto_wrap = 1; 1036 ignaw = 0; 1037 can_goto_line = 1; 1038 clear_bg = 1; 1039 /* 1040 * Set up default colors. 1041 * The xx_s_width and xx_e_width vars are already initialized to 0. 1042 */ 1043 #if MSDOS_COMPILER==MSOFTC 1044 sy_bg_color = _getbkcolor(); 1045 sy_fg_color = _gettextcolor(); 1046 get_clock(); 1047 #else 1048 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 1049 { 1050 struct text_info w; 1051 gettextinfo(&w); 1052 sy_bg_color = (w.attribute >> 4) & 0x0F; 1053 sy_fg_color = (w.attribute >> 0) & 0x0F; 1054 } 1055 #else 1056 #if MSDOS_COMPILER==WIN32C 1057 { 1058 DWORD nread; 1059 CONSOLE_SCREEN_BUFFER_INFO scr; 1060 1061 con_out_save = con_out = GetStdHandle(STD_OUTPUT_HANDLE); 1062 /* 1063 * Always open stdin in binary. Note this *must* be done 1064 * before any file operations have been done on fd0. 1065 */ 1066 SET_BINARY(0); 1067 GetConsoleScreenBufferInfo(con_out, &scr); 1068 ReadConsoleOutputAttribute(con_out, &curr_attr, 1069 1, scr.dwCursorPosition, &nread); 1070 sy_bg_color = (curr_attr & BG_COLORS) >> 4; /* normalize */ 1071 sy_fg_color = curr_attr & FG_COLORS; 1072 } 1073 #endif 1074 #endif 1075 #endif 1076 nm_fg_color = sy_fg_color; 1077 nm_bg_color = sy_bg_color; 1078 bo_fg_color = 11; 1079 bo_bg_color = 0; 1080 ul_fg_color = 9; 1081 ul_bg_color = 0; 1082 so_fg_color = 15; 1083 so_bg_color = 9; 1084 bl_fg_color = 15; 1085 bl_bg_color = 0; 1086 1087 /* 1088 * Get size of the screen. 1089 */ 1090 scrsize(); 1091 pos_init(); 1092 1093 1094 #else /* !MSDOS_COMPILER */ 1095 1096 char *sp; 1097 register char *t1, *t2; 1098 char *term; 1099 char termbuf[TERMBUF_SIZE]; 1100 1101 static char sbuf[TERMSBUF_SIZE]; 1102 1103 #if OS2 1104 /* 1105 * Make sure the termcap database is available. 1106 */ 1107 sp = lgetenv("TERMCAP"); 1108 if (sp == NULL || *sp == '\0') 1109 { 1110 char *termcap; 1111 if ((sp = homefile("termcap.dat")) != NULL) 1112 { 1113 termcap = (char *) ecalloc(strlen(sp)+9, sizeof(char)); 1114 sprintf(termcap, "TERMCAP=%s", sp); 1115 free(sp); 1116 putenv(termcap); 1117 } 1118 } 1119 #endif 1120 /* 1121 * Find out what kind of terminal this is. 1122 */ 1123 if ((term = lgetenv("TERM")) == NULL) 1124 term = DEFAULT_TERM; 1125 hardcopy = 0; 1126 if (tgetent(termbuf, term) <= 0) 1127 hardcopy = 1; 1128 if (ltgetflag("hc")) 1129 hardcopy = 1; 1130 1131 /* 1132 * Get size of the screen. 1133 */ 1134 scrsize(); 1135 pos_init(); 1136 1137 auto_wrap = ltgetflag("am"); 1138 ignaw = ltgetflag("xn"); 1139 above_mem = ltgetflag("da"); 1140 below_mem = ltgetflag("db"); 1141 clear_bg = ltgetflag("ut"); 1142 1143 /* 1144 * Assumes termcap variable "sg" is the printing width of: 1145 * the standout sequence, the end standout sequence, 1146 * the underline sequence, the end underline sequence, 1147 * the boldface sequence, and the end boldface sequence. 1148 */ 1149 if ((so_s_width = ltgetnum("sg")) < 0) 1150 so_s_width = 0; 1151 so_e_width = so_s_width; 1152 1153 bo_s_width = bo_e_width = so_s_width; 1154 ul_s_width = ul_e_width = so_s_width; 1155 bl_s_width = bl_e_width = so_s_width; 1156 1157 #if HILITE_SEARCH 1158 if (so_s_width > 0 || so_e_width > 0) 1159 /* 1160 * Disable highlighting by default on magic cookie terminals. 1161 * Turning on highlighting might change the displayed width 1162 * of a line, causing the display to get messed up. 1163 * The user can turn it back on with -g, 1164 * but she won't like the results. 1165 */ 1166 hilite_search = 0; 1167 #endif 1168 1169 /* 1170 * Get various string-valued capabilities. 1171 */ 1172 sp = sbuf; 1173 1174 #if HAVE_OSPEED 1175 sc_pad = ltgetstr("pc", &sp); 1176 if (sc_pad != NULL) 1177 PC = *sc_pad; 1178 #endif 1179 1180 sc_s_keypad = ltgetstr("ks", &sp); 1181 if (sc_s_keypad == NULL) 1182 sc_s_keypad = ""; 1183 sc_e_keypad = ltgetstr("ke", &sp); 1184 if (sc_e_keypad == NULL) 1185 sc_e_keypad = ""; 1186 1187 /* 1188 * This loses for terminals with termcap entries with ti/te strings 1189 * that switch to/from an alternate screen, and we're in quit_at_eof 1190 * (eg, more(1)). 1191 */ 1192 if (!quit_at_eof && !more_mode) { 1193 sc_init = ltgetstr("ti", &sp); 1194 sc_deinit = ltgetstr("te", &sp); 1195 } 1196 1197 if (sc_init == NULL) 1198 sc_init = ""; 1199 1200 if (sc_deinit == NULL) 1201 sc_deinit = ""; 1202 1203 sc_eol_clear = ltgetstr("ce", &sp); 1204 if (sc_eol_clear == NULL || *sc_eol_clear == '\0') 1205 { 1206 missing_cap = 1; 1207 sc_eol_clear = ""; 1208 } 1209 1210 sc_eos_clear = ltgetstr("cd", &sp); 1211 if (below_mem && (sc_eos_clear == NULL || *sc_eos_clear == '\0')) 1212 { 1213 missing_cap = 1; 1214 sc_eol_clear = ""; 1215 } 1216 1217 sc_clear = ltgetstr("cl", &sp); 1218 if (sc_clear == NULL || *sc_clear == '\0') 1219 { 1220 missing_cap = 1; 1221 sc_clear = "\n\n"; 1222 } 1223 1224 sc_move = ltgetstr("cm", &sp); 1225 if (sc_move == NULL || *sc_move == '\0') 1226 { 1227 /* 1228 * This is not an error here, because we don't 1229 * always need sc_move. 1230 * We need it only if we don't have home or lower-left. 1231 */ 1232 sc_move = ""; 1233 can_goto_line = 0; 1234 } else 1235 can_goto_line = 1; 1236 1237 tmodes("so", "se", &sc_s_in, &sc_s_out, "", "", &sp); 1238 tmodes("us", "ue", &sc_u_in, &sc_u_out, sc_s_in, sc_s_out, &sp); 1239 tmodes("md", "me", &sc_b_in, &sc_b_out, sc_s_in, sc_s_out, &sp); 1240 tmodes("mb", "me", &sc_bl_in, &sc_bl_out, sc_s_in, sc_s_out, &sp); 1241 1242 sc_visual_bell = ltgetstr("vb", &sp); 1243 if (sc_visual_bell == NULL) 1244 sc_visual_bell = ""; 1245 1246 if (ltgetflag("bs")) 1247 sc_backspace = "\b"; 1248 else 1249 { 1250 sc_backspace = ltgetstr("bc", &sp); 1251 if (sc_backspace == NULL || *sc_backspace == '\0') 1252 sc_backspace = "\b"; 1253 } 1254 1255 /* 1256 * Choose between using "ho" and "cm" ("home" and "cursor move") 1257 * to move the cursor to the upper left corner of the screen. 1258 */ 1259 t1 = ltgetstr("ho", &sp); 1260 if (t1 == NULL) 1261 t1 = ""; 1262 if (*sc_move == '\0') 1263 t2 = ""; 1264 else 1265 { 1266 strcpy(sp, tgoto(sc_move, 0, 0)); 1267 t2 = sp; 1268 sp += strlen(sp) + 1; 1269 } 1270 sc_home = cheaper(t1, t2, "|\b^"); 1271 1272 /* 1273 * Choose between using "ll" and "cm" ("lower left" and "cursor move") 1274 * to move the cursor to the lower left corner of the screen. 1275 */ 1276 t1 = ltgetstr("ll", &sp); 1277 if (t1 == NULL) 1278 t1 = ""; 1279 if (*sc_move == '\0') 1280 t2 = ""; 1281 else 1282 { 1283 strcpy(sp, tgoto(sc_move, 0, sc_height-1)); 1284 t2 = sp; 1285 sp += strlen(sp) + 1; 1286 } 1287 sc_lower_left = cheaper(t1, t2, "\r"); 1288 1289 /* 1290 * Choose between using "al" or "sr" ("add line" or "scroll reverse") 1291 * to add a line at the top of the screen. 1292 */ 1293 t1 = ltgetstr("al", &sp); 1294 if (t1 == NULL) 1295 t1 = ""; 1296 t2 = ltgetstr("sr", &sp); 1297 if (t2 == NULL) 1298 t2 = ""; 1299 #if OS2 1300 if (*t1 == '\0' && *t2 == '\0') 1301 sc_addline = ""; 1302 else 1303 #endif 1304 if (above_mem) 1305 sc_addline = t1; 1306 else 1307 sc_addline = cheaper(t1, t2, ""); 1308 if (*sc_addline == '\0') 1309 { 1310 /* 1311 * Force repaint on any backward movement. 1312 */ 1313 no_back_scroll = 1; 1314 } 1315 #endif /* MSDOS_COMPILER */ 1316 } 1317 1318 #if !MSDOS_COMPILER 1319 /* 1320 * Return the cost of displaying a termcap string. 1321 * We use the trick of calling tputs, but as a char printing function 1322 * we give it inc_costcount, which just increments "costcount". 1323 * This tells us how many chars would be printed by using this string. 1324 * {{ Couldn't we just use strlen? }} 1325 */ 1326 static int costcount; 1327 1328 /*ARGSUSED*/ 1329 static int 1330 inc_costcount(c) 1331 int c; 1332 { 1333 costcount++; 1334 return (c); 1335 } 1336 1337 static int 1338 cost(t) 1339 char *t; 1340 { 1341 costcount = 0; 1342 tputs(t, sc_height, inc_costcount); 1343 return (costcount); 1344 } 1345 1346 /* 1347 * Return the "best" of the two given termcap strings. 1348 * The best, if both exist, is the one with the lower 1349 * cost (see cost() function). 1350 */ 1351 static char * 1352 cheaper(t1, t2, def) 1353 char *t1, *t2; 1354 char *def; 1355 { 1356 if (*t1 == '\0' && *t2 == '\0') 1357 { 1358 missing_cap = 1; 1359 return (def); 1360 } 1361 if (*t1 == '\0') 1362 return (t2); 1363 if (*t2 == '\0') 1364 return (t1); 1365 if (cost(t1) < cost(t2)) 1366 return (t1); 1367 return (t2); 1368 } 1369 1370 static void 1371 tmodes(incap, outcap, instr, outstr, def_instr, def_outstr, spp) 1372 char *incap; 1373 char *outcap; 1374 char **instr; 1375 char **outstr; 1376 char *def_instr; 1377 char *def_outstr; 1378 char **spp; 1379 { 1380 *instr = ltgetstr(incap, spp); 1381 if (*instr == NULL) 1382 { 1383 /* Use defaults. */ 1384 *instr = def_instr; 1385 *outstr = def_outstr; 1386 return; 1387 } 1388 1389 *outstr = ltgetstr(outcap, spp); 1390 if (*outstr == NULL) 1391 /* No specific out capability; use "me". */ 1392 *outstr = ltgetstr("me", spp); 1393 if (*outstr == NULL) 1394 /* Don't even have "me"; use a null string. */ 1395 *outstr = ""; 1396 } 1397 1398 #endif /* MSDOS_COMPILER */ 1399 1400 1401 /* 1402 * Below are the functions which perform all the 1403 * terminal-specific screen manipulation. 1404 */ 1405 1406 1407 #if MSDOS_COMPILER 1408 1409 #if MSDOS_COMPILER==WIN32C 1410 static void 1411 _settextposition(int row, int col) 1412 { 1413 COORD cpos; 1414 CONSOLE_SCREEN_BUFFER_INFO csbi; 1415 1416 GetConsoleScreenBufferInfo(con_out, &csbi); 1417 cpos.X = csbi.srWindow.Left + (col - 1); 1418 cpos.Y = csbi.srWindow.Top + (row - 1); 1419 SetConsoleCursorPosition(con_out, cpos); 1420 } 1421 #endif 1422 1423 /* 1424 * Initialize the screen to the correct color at startup. 1425 */ 1426 static void 1427 initcolor() 1428 { 1429 SETCOLORS(nm_fg_color, nm_bg_color); 1430 #if 0 1431 /* 1432 * This clears the screen at startup. This is different from 1433 * the behavior of other versions of less. Disable it for now. 1434 */ 1435 char *blanks; 1436 int row; 1437 int col; 1438 1439 /* 1440 * Create a complete, blank screen using "normal" colors. 1441 */ 1442 SETCOLORS(nm_fg_color, nm_bg_color); 1443 blanks = (char *) ecalloc(width+1, sizeof(char)); 1444 for (col = 0; col < sc_width; col++) 1445 blanks[col] = ' '; 1446 blanks[sc_width] = '\0'; 1447 for (row = 0; row < sc_height; row++) 1448 _outtext(blanks); 1449 free(blanks); 1450 #endif 1451 } 1452 #endif 1453 1454 #if MSDOS_COMPILER==WIN32C 1455 1456 /* 1457 * Termcap-like init with a private win32 console. 1458 */ 1459 static void 1460 win32_init_term() 1461 { 1462 CONSOLE_SCREEN_BUFFER_INFO scr; 1463 COORD size; 1464 1465 if (con_out_save == INVALID_HANDLE_VALUE) 1466 return; 1467 1468 GetConsoleScreenBufferInfo(con_out_save, &scr); 1469 1470 if (con_out_ours == INVALID_HANDLE_VALUE) 1471 { 1472 /* 1473 * Create our own screen buffer, so that we 1474 * may restore the original when done. 1475 */ 1476 con_out_ours = CreateConsoleScreenBuffer( 1477 GENERIC_WRITE | GENERIC_READ, 1478 FILE_SHARE_WRITE | FILE_SHARE_READ, 1479 (LPSECURITY_ATTRIBUTES) NULL, 1480 CONSOLE_TEXTMODE_BUFFER, 1481 (LPVOID) NULL); 1482 } 1483 1484 size.X = scr.srWindow.Right - scr.srWindow.Left + 1; 1485 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1; 1486 SetConsoleScreenBufferSize(con_out_ours, size); 1487 SetConsoleActiveScreenBuffer(con_out_ours); 1488 con_out = con_out_ours; 1489 } 1490 1491 /* 1492 * Restore the startup console. 1493 */ 1494 static void 1495 win32_deinit_term() 1496 { 1497 if (con_out_save == INVALID_HANDLE_VALUE) 1498 return; 1499 if (quitting) 1500 (void) CloseHandle(con_out_ours); 1501 SetConsoleActiveScreenBuffer(con_out_save); 1502 con_out = con_out_save; 1503 } 1504 1505 #endif 1506 1507 /* 1508 * Initialize terminal 1509 */ 1510 public void 1511 init() 1512 { 1513 #if !MSDOS_COMPILER 1514 if (!no_init) 1515 tputs(sc_init, sc_height, putchr); 1516 if (!no_keypad) 1517 tputs(sc_s_keypad, sc_height, putchr); 1518 #else 1519 #if MSDOS_COMPILER==WIN32C 1520 if (!no_init) 1521 win32_init_term(); 1522 #endif 1523 initcolor(); 1524 flush(); 1525 #endif 1526 init_done = 1; 1527 } 1528 1529 /* 1530 * Deinitialize terminal 1531 */ 1532 public void 1533 deinit() 1534 { 1535 if (!init_done) 1536 return; 1537 #if !MSDOS_COMPILER 1538 if (!no_keypad) 1539 tputs(sc_e_keypad, sc_height, putchr); 1540 if (!no_init) 1541 tputs(sc_deinit, sc_height, putchr); 1542 #else 1543 /* Restore system colors. */ 1544 SETCOLORS(sy_fg_color, sy_bg_color); 1545 #if MSDOS_COMPILER==WIN32C 1546 if (!no_init) 1547 win32_deinit_term(); 1548 #else 1549 /* Need clreol to make SETCOLORS take effect. */ 1550 clreol(); 1551 #endif 1552 #endif 1553 init_done = 0; 1554 } 1555 1556 /* 1557 * Home cursor (move to upper left corner of screen). 1558 */ 1559 public void 1560 home() 1561 { 1562 #if !MSDOS_COMPILER 1563 tputs(sc_home, 1, putchr); 1564 #else 1565 flush(); 1566 _settextposition(1,1); 1567 #endif 1568 } 1569 1570 /* 1571 * Add a blank line (called with cursor at home). 1572 * Should scroll the display down. 1573 */ 1574 public void 1575 add_line() 1576 { 1577 #if !MSDOS_COMPILER 1578 tputs(sc_addline, sc_height, putchr); 1579 #else 1580 flush(); 1581 #if MSDOS_COMPILER==MSOFTC 1582 _scrolltextwindow(_GSCROLLDOWN); 1583 _settextposition(1,1); 1584 #else 1585 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 1586 movetext(1,1, sc_width,sc_height-1, 1,2); 1587 gotoxy(1,1); 1588 clreol(); 1589 #else 1590 #if MSDOS_COMPILER==WIN32C 1591 { 1592 CHAR_INFO fillchar; 1593 SMALL_RECT rcSrc, rcClip; 1594 COORD new_org; 1595 CONSOLE_SCREEN_BUFFER_INFO csbi; 1596 1597 GetConsoleScreenBufferInfo(con_out,&csbi); 1598 1599 /* The clip rectangle is the entire visible screen. */ 1600 rcClip.Left = csbi.srWindow.Left; 1601 rcClip.Top = csbi.srWindow.Top; 1602 rcClip.Right = csbi.srWindow.Right; 1603 rcClip.Bottom = csbi.srWindow.Bottom; 1604 1605 /* The source rectangle is the visible screen minus the last line. */ 1606 rcSrc = rcClip; 1607 rcSrc.Bottom--; 1608 1609 /* Move the top left corner of the source window down one row. */ 1610 new_org.X = rcSrc.Left; 1611 new_org.Y = rcSrc.Top + 1; 1612 1613 /* Fill the right character and attributes. */ 1614 fillchar.Char.AsciiChar = ' '; 1615 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 1616 fillchar.Attributes = curr_attr; 1617 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); 1618 _settextposition(1,1); 1619 } 1620 #endif 1621 #endif 1622 #endif 1623 #endif 1624 } 1625 1626 #if 0 1627 /* 1628 * Remove the n topmost lines and scroll everything below it in the 1629 * window upward. This is needed to stop leaking the topmost line 1630 * into the scrollback buffer when we go down-one-line (in WIN32). 1631 */ 1632 public void 1633 remove_top(n) 1634 int n; 1635 { 1636 #if MSDOS_COMPILER==WIN32C 1637 SMALL_RECT rcSrc, rcClip; 1638 CHAR_INFO fillchar; 1639 COORD new_org; 1640 CONSOLE_SCREEN_BUFFER_INFO csbi; /* to get buffer info */ 1641 1642 if (n >= sc_height - 1) 1643 { 1644 clear(); 1645 home(); 1646 return; 1647 } 1648 1649 flush(); 1650 1651 GetConsoleScreenBufferInfo(con_out, &csbi); 1652 1653 /* Get the extent of all-visible-rows-but-the-last. */ 1654 rcSrc.Left = csbi.srWindow.Left; 1655 rcSrc.Top = csbi.srWindow.Top + n; 1656 rcSrc.Right = csbi.srWindow.Right; 1657 rcSrc.Bottom = csbi.srWindow.Bottom; 1658 1659 /* Get the clip rectangle. */ 1660 rcClip.Left = rcSrc.Left; 1661 rcClip.Top = csbi.srWindow.Top; 1662 rcClip.Right = rcSrc.Right; 1663 rcClip.Bottom = rcSrc.Bottom ; 1664 1665 /* Move the source window up n rows. */ 1666 new_org.X = rcSrc.Left; 1667 new_org.Y = rcSrc.Top - n; 1668 1669 /* Fill the right character and attributes. */ 1670 fillchar.Char.AsciiChar = ' '; 1671 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 1672 fillchar.Attributes = curr_attr; 1673 1674 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); 1675 1676 /* Position cursor on first blank line. */ 1677 goto_line(sc_height - n - 1); 1678 #endif 1679 } 1680 #endif 1681 1682 #if MSDOS_COMPILER==WIN32C 1683 /* 1684 * Clear the screen. 1685 */ 1686 static void 1687 win32_clear() 1688 { 1689 /* 1690 * This will clear only the currently visible rows of the NT 1691 * console buffer, which means none of the precious scrollback 1692 * rows are touched making for faster scrolling. Note that, if 1693 * the window has fewer columns than the console buffer (i.e. 1694 * there is a horizontal scrollbar as well), the entire width 1695 * of the visible rows will be cleared. 1696 */ 1697 COORD topleft; 1698 DWORD nchars; 1699 DWORD winsz; 1700 CONSOLE_SCREEN_BUFFER_INFO csbi; 1701 1702 /* get the number of cells in the current buffer */ 1703 GetConsoleScreenBufferInfo(con_out, &csbi); 1704 winsz = csbi.dwSize.X * (csbi.srWindow.Bottom - csbi.srWindow.Top + 1); 1705 topleft.X = 0; 1706 topleft.Y = csbi.srWindow.Top; 1707 1708 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 1709 FillConsoleOutputCharacter(con_out, ' ', winsz, topleft, &nchars); 1710 FillConsoleOutputAttribute(con_out, curr_attr, winsz, topleft, &nchars); 1711 } 1712 1713 /* 1714 * Remove the n topmost lines and scroll everything below it in the 1715 * window upward. 1716 */ 1717 public void 1718 win32_scroll_up(n) 1719 int n; 1720 { 1721 SMALL_RECT rcSrc, rcClip; 1722 CHAR_INFO fillchar; 1723 COORD topleft; 1724 COORD new_org; 1725 DWORD nchars; 1726 DWORD size; 1727 CONSOLE_SCREEN_BUFFER_INFO csbi; 1728 1729 if (n <= 0) 1730 return; 1731 1732 if (n >= sc_height - 1) 1733 { 1734 win32_clear(); 1735 _settextposition(1,1); 1736 return; 1737 } 1738 1739 /* Get the extent of what will remain visible after scrolling. */ 1740 GetConsoleScreenBufferInfo(con_out, &csbi); 1741 rcSrc.Left = csbi.srWindow.Left; 1742 rcSrc.Top = csbi.srWindow.Top + n; 1743 rcSrc.Right = csbi.srWindow.Right; 1744 rcSrc.Bottom = csbi.srWindow.Bottom; 1745 1746 /* Get the clip rectangle. */ 1747 rcClip.Left = rcSrc.Left; 1748 rcClip.Top = csbi.srWindow.Top; 1749 rcClip.Right = rcSrc.Right; 1750 rcClip.Bottom = rcSrc.Bottom ; 1751 1752 /* Move the source text to the top of the screen. */ 1753 new_org.X = rcSrc.Left; 1754 new_org.Y = 0; 1755 1756 /* Fill the right character and attributes. */ 1757 fillchar.Char.AsciiChar = ' '; 1758 fillchar.Attributes = MAKEATTR(nm_fg_color, nm_bg_color); 1759 1760 /* Scroll the window. */ 1761 SetConsoleTextAttribute(con_out, fillchar.Attributes); 1762 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); 1763 1764 /* Clear remaining lines at bottom. */ 1765 topleft.X = csbi.dwCursorPosition.X; 1766 topleft.Y = rcSrc.Bottom - n; 1767 size = (n * csbi.dwSize.X) + (rcSrc.Right - topleft.X); 1768 FillConsoleOutputCharacter(con_out, ' ', size, topleft, 1769 &nchars); 1770 FillConsoleOutputAttribute(con_out, fillchar.Attributes, size, topleft, 1771 &nchars); 1772 SetConsoleTextAttribute(con_out, curr_attr); 1773 1774 /* Move cursor n lines up from where it was. */ 1775 csbi.dwCursorPosition.Y -= n; 1776 SetConsoleCursorPosition(con_out, csbi.dwCursorPosition); 1777 } 1778 #endif 1779 1780 /* 1781 * Move cursor to lower left corner of screen. 1782 */ 1783 public void 1784 lower_left() 1785 { 1786 #if !MSDOS_COMPILER 1787 tputs(sc_lower_left, 1, putchr); 1788 #else 1789 flush(); 1790 _settextposition(sc_height, 1); 1791 #endif 1792 } 1793 1794 /* 1795 * Check if the console size has changed and reset internals 1796 * (in lieu of SIGWINCH for WIN32). 1797 */ 1798 public void 1799 check_winch() 1800 { 1801 #if MSDOS_COMPILER==WIN32C 1802 CONSOLE_SCREEN_BUFFER_INFO scr; 1803 COORD size; 1804 1805 if (con_out == INVALID_HANDLE_VALUE) 1806 return; 1807 1808 flush(); 1809 GetConsoleScreenBufferInfo(con_out, &scr); 1810 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1; 1811 size.X = scr.srWindow.Right - scr.srWindow.Left + 1; 1812 if (size.Y != sc_height || size.X != sc_width) 1813 { 1814 sc_height = size.Y; 1815 sc_width = size.X; 1816 if (!no_init && con_out_ours == con_out) 1817 SetConsoleScreenBufferSize(con_out, size); 1818 pos_init(); 1819 wscroll = (sc_height + 1) / 2; 1820 screen_trashed = 1; 1821 } 1822 #endif 1823 } 1824 1825 /* 1826 * Goto a specific line on the screen. 1827 */ 1828 public void 1829 goto_line(slinenum) 1830 int slinenum; 1831 { 1832 #if !MSDOS_COMPILER 1833 tputs(tgoto(sc_move, 0, slinenum), 1, putchr); 1834 #else 1835 flush(); 1836 _settextposition(slinenum+1, 1); 1837 #endif 1838 } 1839 1840 #if MSDOS_COMPILER==MSOFTC || MSDOS_COMPILER==BORLANDC 1841 /* 1842 * Create an alternate screen which is all white. 1843 * This screen is used to create a "flash" effect, by displaying it 1844 * briefly and then switching back to the normal screen. 1845 * {{ Yuck! There must be a better way to get a visual bell. }} 1846 */ 1847 static void 1848 create_flash() 1849 { 1850 #if MSDOS_COMPILER==MSOFTC 1851 struct videoconfig w; 1852 char *blanks; 1853 int row, col; 1854 1855 _getvideoconfig(&w); 1856 videopages = w.numvideopages; 1857 if (videopages < 2) 1858 { 1859 so_enter(); 1860 so_exit(); 1861 } else 1862 { 1863 _setactivepage(1); 1864 so_enter(); 1865 blanks = (char *) ecalloc(w.numtextcols, sizeof(char)); 1866 for (col = 0; col < w.numtextcols; col++) 1867 blanks[col] = ' '; 1868 for (row = w.numtextrows; row > 0; row--) 1869 _outmem(blanks, w.numtextcols); 1870 _setactivepage(0); 1871 _setvisualpage(0); 1872 free(blanks); 1873 so_exit(); 1874 } 1875 #else 1876 #if MSDOS_COMPILER==BORLANDC 1877 register int n; 1878 1879 whitescreen = (unsigned short *) 1880 malloc(sc_width * sc_height * sizeof(short)); 1881 if (whitescreen == NULL) 1882 return; 1883 for (n = 0; n < sc_width * sc_height; n++) 1884 whitescreen[n] = 0x7020; 1885 #else 1886 #if MSDOS_COMPILER==WIN32C 1887 register int n; 1888 1889 whitescreen = (WORD *) 1890 malloc(sc_height * sc_width * sizeof(WORD)); 1891 if (whitescreen == NULL) 1892 return; 1893 /* Invert the standard colors. */ 1894 for (n = 0; n < sc_width * sc_height; n++) 1895 whitescreen[n] = (WORD)((nm_fg_color << 4) | nm_bg_color); 1896 #endif 1897 #endif 1898 #endif 1899 flash_created = 1; 1900 } 1901 #endif /* MSDOS_COMPILER */ 1902 1903 /* 1904 * Output the "visual bell", if there is one. 1905 */ 1906 public void 1907 vbell() 1908 { 1909 #if !MSDOS_COMPILER 1910 if (*sc_visual_bell == '\0') 1911 return; 1912 tputs(sc_visual_bell, sc_height, putchr); 1913 #else 1914 #if MSDOS_COMPILER==DJGPPC 1915 ScreenVisualBell(); 1916 #else 1917 #if MSDOS_COMPILER==MSOFTC 1918 /* 1919 * Create a flash screen on the second video page. 1920 * Switch to that page, then switch back. 1921 */ 1922 if (!flash_created) 1923 create_flash(); 1924 if (videopages < 2) 1925 return; 1926 _setvisualpage(1); 1927 delay(100); 1928 _setvisualpage(0); 1929 #else 1930 #if MSDOS_COMPILER==BORLANDC 1931 unsigned short *currscreen; 1932 1933 /* 1934 * Get a copy of the current screen. 1935 * Display the flash screen. 1936 * Then restore the old screen. 1937 */ 1938 if (!flash_created) 1939 create_flash(); 1940 if (whitescreen == NULL) 1941 return; 1942 currscreen = (unsigned short *) 1943 malloc(sc_width * sc_height * sizeof(short)); 1944 if (currscreen == NULL) return; 1945 gettext(1, 1, sc_width, sc_height, currscreen); 1946 puttext(1, 1, sc_width, sc_height, whitescreen); 1947 delay(100); 1948 puttext(1, 1, sc_width, sc_height, currscreen); 1949 free(currscreen); 1950 #else 1951 #if MSDOS_COMPILER==WIN32C 1952 /* paint screen with an inverse color */ 1953 clear(); 1954 1955 /* leave it displayed for 100 msec. */ 1956 Sleep(100); 1957 1958 /* restore with a redraw */ 1959 repaint(); 1960 #endif 1961 #endif 1962 #endif 1963 #endif 1964 #endif 1965 } 1966 1967 /* 1968 * Make a noise. 1969 */ 1970 static void 1971 beep() 1972 { 1973 #if !MSDOS_COMPILER 1974 putchr(CONTROL('G')); 1975 #else 1976 #if MSDOS_COMPILER==WIN32C 1977 MessageBeep(0); 1978 #else 1979 write(1, "\7", 1); 1980 #endif 1981 #endif 1982 } 1983 1984 /* 1985 * Ring the terminal bell. 1986 */ 1987 public void 1988 bell() 1989 { 1990 if (quiet == VERY_QUIET) 1991 vbell(); 1992 else 1993 beep(); 1994 } 1995 1996 /* 1997 * Clear the screen. 1998 */ 1999 public void 2000 clear() 2001 { 2002 #if !MSDOS_COMPILER 2003 tputs(sc_clear, sc_height, putchr); 2004 #else 2005 flush(); 2006 #if MSDOS_COMPILER==WIN32C 2007 win32_clear(); 2008 #else 2009 _clearscreen(_GCLEARSCREEN); 2010 #endif 2011 #endif 2012 } 2013 2014 /* 2015 * Clear from the cursor to the end of the cursor's line. 2016 * {{ This must not move the cursor. }} 2017 */ 2018 public void 2019 clear_eol() 2020 { 2021 #if !MSDOS_COMPILER 2022 tputs(sc_eol_clear, 1, putchr); 2023 #else 2024 #if MSDOS_COMPILER==MSOFTC 2025 short top, left; 2026 short bot, right; 2027 struct rccoord tpos; 2028 2029 flush(); 2030 /* 2031 * Save current state. 2032 */ 2033 tpos = _gettextposition(); 2034 _gettextwindow(&top, &left, &bot, &right); 2035 /* 2036 * Set a temporary window to the current line, 2037 * from the cursor's position to the right edge of the screen. 2038 * Then clear that window. 2039 */ 2040 _settextwindow(tpos.row, tpos.col, tpos.row, sc_width); 2041 _clearscreen(_GWINDOW); 2042 /* 2043 * Restore state. 2044 */ 2045 _settextwindow(top, left, bot, right); 2046 _settextposition(tpos.row, tpos.col); 2047 #else 2048 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 2049 flush(); 2050 clreol(); 2051 #else 2052 #if MSDOS_COMPILER==WIN32C 2053 DWORD nchars; 2054 COORD cpos; 2055 CONSOLE_SCREEN_BUFFER_INFO scr; 2056 2057 flush(); 2058 memset(&scr, 0, sizeof(scr)); 2059 GetConsoleScreenBufferInfo(con_out, &scr); 2060 cpos.X = scr.dwCursorPosition.X; 2061 cpos.Y = scr.dwCursorPosition.Y; 2062 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 2063 FillConsoleOutputAttribute(con_out, curr_attr, 2064 scr.dwSize.X - cpos.X, cpos, &nchars); 2065 FillConsoleOutputCharacter(con_out, ' ', 2066 scr.dwSize.X - cpos.X, cpos, &nchars); 2067 #endif 2068 #endif 2069 #endif 2070 #endif 2071 } 2072 2073 /* 2074 * Clear the current line. 2075 * Clear the screen if there's off-screen memory below the display. 2076 */ 2077 static void 2078 clear_eol_bot() 2079 { 2080 #if MSDOS_COMPILER 2081 clear_eol(); 2082 #else 2083 if (below_mem) 2084 tputs(sc_eos_clear, 1, putchr); 2085 else 2086 tputs(sc_eol_clear, 1, putchr); 2087 #endif 2088 } 2089 2090 /* 2091 * Clear the bottom line of the display. 2092 * Leave the cursor at the beginning of the bottom line. 2093 */ 2094 public void 2095 clear_bot() 2096 { 2097 /* 2098 * If we're in a non-normal attribute mode, temporarily exit 2099 * the mode while we do the clear. Some terminals fill the 2100 * cleared area with the current attribute. 2101 */ 2102 lower_left(); 2103 switch (attrmode) 2104 { 2105 case AT_STANDOUT: 2106 so_exit(); 2107 clear_eol_bot(); 2108 so_enter(); 2109 break; 2110 case AT_UNDERLINE: 2111 ul_exit(); 2112 clear_eol_bot(); 2113 ul_enter(); 2114 break; 2115 case AT_BOLD: 2116 bo_exit(); 2117 clear_eol_bot(); 2118 bo_enter(); 2119 break; 2120 case AT_BLINK: 2121 bl_exit(); 2122 clear_eol_bot(); 2123 bl_enter(); 2124 break; 2125 default: 2126 clear_eol_bot(); 2127 break; 2128 } 2129 } 2130 2131 /* 2132 * Begin "standout" (bold, underline, or whatever). 2133 */ 2134 public void 2135 so_enter() 2136 { 2137 #if !MSDOS_COMPILER 2138 tputs(sc_s_in, 1, putchr); 2139 #else 2140 flush(); 2141 SETCOLORS(so_fg_color, so_bg_color); 2142 #endif 2143 attrmode = AT_STANDOUT; 2144 } 2145 2146 /* 2147 * End "standout". 2148 */ 2149 public void 2150 so_exit() 2151 { 2152 #if !MSDOS_COMPILER 2153 tputs(sc_s_out, 1, putchr); 2154 #else 2155 flush(); 2156 SETCOLORS(nm_fg_color, nm_bg_color); 2157 #endif 2158 attrmode = AT_NORMAL; 2159 } 2160 2161 /* 2162 * Begin "underline" (hopefully real underlining, 2163 * otherwise whatever the terminal provides). 2164 */ 2165 public void 2166 ul_enter() 2167 { 2168 #if !MSDOS_COMPILER 2169 tputs(sc_u_in, 1, putchr); 2170 #else 2171 flush(); 2172 SETCOLORS(ul_fg_color, ul_bg_color); 2173 #endif 2174 attrmode = AT_UNDERLINE; 2175 } 2176 2177 /* 2178 * End "underline". 2179 */ 2180 public void 2181 ul_exit() 2182 { 2183 #if !MSDOS_COMPILER 2184 tputs(sc_u_out, 1, putchr); 2185 #else 2186 flush(); 2187 SETCOLORS(nm_fg_color, nm_bg_color); 2188 #endif 2189 attrmode = AT_NORMAL; 2190 } 2191 2192 /* 2193 * Begin "bold" 2194 */ 2195 public void 2196 bo_enter() 2197 { 2198 #if !MSDOS_COMPILER 2199 tputs(sc_b_in, 1, putchr); 2200 #else 2201 flush(); 2202 SETCOLORS(bo_fg_color, bo_bg_color); 2203 #endif 2204 attrmode = AT_BOLD; 2205 } 2206 2207 /* 2208 * End "bold". 2209 */ 2210 public void 2211 bo_exit() 2212 { 2213 #if !MSDOS_COMPILER 2214 tputs(sc_b_out, 1, putchr); 2215 #else 2216 flush(); 2217 SETCOLORS(nm_fg_color, nm_bg_color); 2218 #endif 2219 attrmode = AT_NORMAL; 2220 } 2221 2222 /* 2223 * Begin "blink" 2224 */ 2225 public void 2226 bl_enter() 2227 { 2228 #if !MSDOS_COMPILER 2229 tputs(sc_bl_in, 1, putchr); 2230 #else 2231 flush(); 2232 SETCOLORS(bl_fg_color, bl_bg_color); 2233 #endif 2234 attrmode = AT_BLINK; 2235 } 2236 2237 /* 2238 * End "blink". 2239 */ 2240 public void 2241 bl_exit() 2242 { 2243 #if !MSDOS_COMPILER 2244 tputs(sc_bl_out, 1, putchr); 2245 #else 2246 flush(); 2247 SETCOLORS(nm_fg_color, nm_bg_color); 2248 #endif 2249 attrmode = AT_NORMAL; 2250 } 2251 2252 #if 0 /* No longer used */ 2253 /* 2254 * Erase the character to the left of the cursor 2255 * and move the cursor left. 2256 */ 2257 public void 2258 backspace() 2259 { 2260 #if !MSDOS_COMPILER 2261 /* 2262 * Erase the previous character by overstriking with a space. 2263 */ 2264 tputs(sc_backspace, 1, putchr); 2265 putchr(' '); 2266 tputs(sc_backspace, 1, putchr); 2267 #else 2268 #if MSDOS_COMPILER==MSOFTC 2269 struct rccoord tpos; 2270 2271 flush(); 2272 tpos = _gettextposition(); 2273 if (tpos.col <= 1) 2274 return; 2275 _settextposition(tpos.row, tpos.col-1); 2276 _outtext(" "); 2277 _settextposition(tpos.row, tpos.col-1); 2278 #else 2279 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 2280 cputs("\b"); 2281 #else 2282 #if MSDOS_COMPILER==WIN32C 2283 COORD cpos; 2284 DWORD cChars; 2285 CONSOLE_SCREEN_BUFFER_INFO scr; 2286 2287 flush(); 2288 GetConsoleScreenBufferInfo(con_out, &scr); 2289 cpos = scr.dwCursorPosition; 2290 if (cpos.X <= 0) 2291 return; 2292 cpos.X--; 2293 SetConsoleCursorPosition(con_out, cpos); 2294 FillConsoleOutputCharacter(con_out, (TCHAR)' ', 1, cpos, &cChars); 2295 SetConsoleCursorPosition(con_out, cpos); 2296 #endif 2297 #endif 2298 #endif 2299 #endif 2300 } 2301 #endif /* 0 */ 2302 2303 /* 2304 * Output a plain backspace, without erasing the previous char. 2305 */ 2306 public void 2307 putbs() 2308 { 2309 #if !MSDOS_COMPILER 2310 tputs(sc_backspace, 1, putchr); 2311 #else 2312 int row, col; 2313 2314 flush(); 2315 { 2316 #if MSDOS_COMPILER==MSOFTC 2317 struct rccoord tpos; 2318 tpos = _gettextposition(); 2319 row = tpos.row; 2320 col = tpos.col; 2321 #else 2322 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 2323 row = wherey(); 2324 col = wherex(); 2325 #else 2326 #if MSDOS_COMPILER==WIN32C 2327 CONSOLE_SCREEN_BUFFER_INFO scr; 2328 GetConsoleScreenBufferInfo(con_out, &scr); 2329 row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1; 2330 col = scr.dwCursorPosition.X - scr.srWindow.Left + 1; 2331 #endif 2332 #endif 2333 #endif 2334 } 2335 if (col <= 1) 2336 return; 2337 _settextposition(row, col-1); 2338 #endif /* MSDOS_COMPILER */ 2339 } 2340 2341 #if MSDOS_COMPILER==WIN32C 2342 /* 2343 * Determine whether an input character is waiting to be read. 2344 */ 2345 static int 2346 win32_kbhit(tty) 2347 HANDLE tty; 2348 { 2349 INPUT_RECORD ip; 2350 DWORD read; 2351 2352 if (keyCount > 0) 2353 return (TRUE); 2354 2355 currentKey.ascii = 0; 2356 currentKey.scan = 0; 2357 2358 /* 2359 * Wait for a real key-down event, but 2360 * ignore SHIFT and CONTROL key events. 2361 */ 2362 do 2363 { 2364 PeekConsoleInput(tty, &ip, 1, &read); 2365 if (read == 0) 2366 return (FALSE); 2367 ReadConsoleInput(tty, &ip, 1, &read); 2368 } while (ip.EventType != KEY_EVENT || 2369 ip.Event.KeyEvent.bKeyDown != TRUE || 2370 ip.Event.KeyEvent.wVirtualScanCode == 0 || 2371 ip.Event.KeyEvent.wVirtualKeyCode == VK_SHIFT || 2372 ip.Event.KeyEvent.wVirtualKeyCode == VK_CONTROL || 2373 ip.Event.KeyEvent.wVirtualKeyCode == VK_MENU); 2374 2375 currentKey.ascii = ip.Event.KeyEvent.uChar.AsciiChar; 2376 currentKey.scan = ip.Event.KeyEvent.wVirtualScanCode; 2377 keyCount = ip.Event.KeyEvent.wRepeatCount; 2378 2379 if (ip.Event.KeyEvent.dwControlKeyState & 2380 (LEFT_ALT_PRESSED | RIGHT_ALT_PRESSED)) 2381 { 2382 switch (currentKey.scan) 2383 { 2384 case PCK_ALT_E: /* letter 'E' */ 2385 currentKey.ascii = 0; 2386 break; 2387 } 2388 } else if (ip.Event.KeyEvent.dwControlKeyState & 2389 (LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED)) 2390 { 2391 switch (currentKey.scan) 2392 { 2393 case PCK_RIGHT: /* right arrow */ 2394 currentKey.scan = PCK_CTL_RIGHT; 2395 break; 2396 case PCK_LEFT: /* left arrow */ 2397 currentKey.scan = PCK_CTL_LEFT; 2398 break; 2399 case PCK_DELETE: /* delete */ 2400 currentKey.scan = PCK_CTL_DELETE; 2401 break; 2402 } 2403 } 2404 return (TRUE); 2405 } 2406 2407 /* 2408 * Read a character from the keyboard. 2409 */ 2410 public char 2411 WIN32getch(tty) 2412 int tty; 2413 { 2414 int ascii; 2415 2416 if (pending_scancode) 2417 { 2418 pending_scancode = 0; 2419 return ((char)(currentKey.scan & 0x00FF)); 2420 } 2421 2422 while (win32_kbhit((HANDLE)tty) == FALSE) 2423 { 2424 Sleep(20); 2425 if (ABORT_SIGS()) 2426 return ('\003'); 2427 continue; 2428 } 2429 keyCount --; 2430 ascii = currentKey.ascii; 2431 /* 2432 * On PC's, the extended keys return a 2 byte sequence beginning 2433 * with '00', so if the ascii code is 00, the next byte will be 2434 * the lsb of the scan code. 2435 */ 2436 pending_scancode = (ascii == 0x00); 2437 return ((char)ascii); 2438 } 2439 #endif 2440