1 /* $FreeBSD$ */ 2 /* 3 * Copyright (C) 1984-2005 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_SYS_IOCTL_H 43 #include <sys/ioctl.h> 44 #endif 45 46 #if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS 47 #include <termios.h> 48 #else 49 #if HAVE_TERMIO_H 50 #include <termio.h> 51 #else 52 #if HAVE_SGSTAT_H 53 #include <sgstat.h> 54 #else 55 #include <sgtty.h> 56 #endif 57 #endif 58 #endif 59 60 #if HAVE_TERMCAP_H 61 #include <termcap.h> 62 #endif 63 #ifdef _OSK 64 #include <signal.h> 65 #endif 66 #if OS2 67 #include <sys/signal.h> 68 #include "pckeys.h" 69 #endif 70 #if HAVE_SYS_STREAM_H 71 #include <sys/stream.h> 72 #endif 73 #if HAVE_SYS_PTEM_H 74 #include <sys/ptem.h> 75 #endif 76 77 #endif /* MSDOS_COMPILER */ 78 79 /* 80 * Check for broken termios package that forces you to manually 81 * set the line discipline. 82 */ 83 #ifdef __ultrix__ 84 #define MUST_SET_LINE_DISCIPLINE 1 85 #else 86 #define MUST_SET_LINE_DISCIPLINE 0 87 #endif 88 89 #if OS2 90 #define DEFAULT_TERM "ansi" 91 static char *windowid; 92 #else 93 #define DEFAULT_TERM "unknown" 94 #endif 95 96 #if MSDOS_COMPILER==MSOFTC 97 static int videopages; 98 static long msec_loops; 99 static int flash_created = 0; 100 #define SETCOLORS(fg,bg) { _settextcolor(fg); _setbkcolor(bg); } 101 #endif 102 103 #if MSDOS_COMPILER==BORLANDC 104 static unsigned short *whitescreen; 105 static int flash_created = 0; 106 #endif 107 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 108 #define _settextposition(y,x) gotoxy(x,y) 109 #define _clearscreen(m) clrscr() 110 #define _outtext(s) cputs(s) 111 #define SETCOLORS(fg,bg) { textcolor(fg); textbackground(bg); } 112 extern int sc_height; 113 #endif 114 115 #if MSDOS_COMPILER==WIN32C 116 struct keyRecord 117 { 118 int ascii; 119 int scan; 120 } currentKey; 121 122 static int keyCount = 0; 123 static WORD curr_attr; 124 static int pending_scancode = 0; 125 static WORD *whitescreen; 126 127 static HANDLE con_out_save = INVALID_HANDLE_VALUE; /* previous console */ 128 static HANDLE con_out_ours = INVALID_HANDLE_VALUE; /* our own */ 129 HANDLE con_out = INVALID_HANDLE_VALUE; /* current console */ 130 131 extern int quitting; 132 static void win32_init_term(); 133 static void win32_deinit_term(); 134 135 #define FG_COLORS (FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_INTENSITY) 136 #define BG_COLORS (BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE | BACKGROUND_INTENSITY) 137 #define MAKEATTR(fg,bg) ((WORD)((fg)|((bg)<<4))) 138 #define SETCOLORS(fg,bg) { curr_attr = MAKEATTR(fg,bg); \ 139 if (SetConsoleTextAttribute(con_out, curr_attr) == 0) \ 140 error("SETCOLORS failed"); } 141 #endif 142 143 #if MSDOS_COMPILER 144 public int nm_fg_color; /* Color of normal text */ 145 public int nm_bg_color; 146 public int bo_fg_color; /* Color of bold text */ 147 public int bo_bg_color; 148 public int ul_fg_color; /* Color of underlined text */ 149 public int ul_bg_color; 150 public int so_fg_color; /* Color of standout text */ 151 public int so_bg_color; 152 public int bl_fg_color; /* Color of blinking text */ 153 public int bl_bg_color; 154 static int sy_fg_color; /* Color of system text (before less) */ 155 static int sy_bg_color; 156 157 #else 158 159 /* 160 * Strings passed to tputs() to do various terminal functions. 161 */ 162 static char 163 *sc_pad, /* Pad string */ 164 *sc_home, /* Cursor home */ 165 *sc_addline, /* Add line, scroll down following lines */ 166 *sc_lower_left, /* Cursor to last line, first column */ 167 *sc_move, /* General cursor positioning */ 168 *sc_clear, /* Clear screen */ 169 *sc_eol_clear, /* Clear to end of line */ 170 *sc_eos_clear, /* Clear to end of screen */ 171 *sc_s_in, /* Enter standout (highlighted) mode */ 172 *sc_s_out, /* Exit standout mode */ 173 *sc_u_in, /* Enter underline mode */ 174 *sc_u_out, /* Exit underline mode */ 175 *sc_b_in, /* Enter bold mode */ 176 *sc_b_out, /* Exit bold mode */ 177 *sc_bl_in, /* Enter blink mode */ 178 *sc_bl_out, /* Exit blink mode */ 179 *sc_visual_bell, /* Visual bell (flash screen) sequence */ 180 *sc_backspace, /* Backspace cursor */ 181 *sc_s_keypad, /* Start keypad mode */ 182 *sc_e_keypad, /* End keypad mode */ 183 *sc_init, /* Startup terminal initialization */ 184 *sc_deinit; /* Exit terminal de-initialization */ 185 #endif 186 187 static int init_done = 0; 188 189 public int auto_wrap; /* Terminal does \r\n when write past margin */ 190 public int ignaw; /* Terminal ignores \n immediately after wrap */ 191 public int erase_char; /* The user's erase char */ 192 public int erase2_char; /* The user's other erase char */ 193 public int kill_char; /* The user's line-kill char */ 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 extern int binattr; 207 208 #if !MSDOS_COMPILER 209 static char *cheaper(); 210 static void tmodes(); 211 #endif 212 213 /* 214 * These two variables are sometimes defined in, 215 * and needed by, the termcap library. 216 */ 217 #if MUST_DEFINE_OSPEED 218 extern short ospeed; /* Terminal output baud rate */ 219 extern char PC; /* Pad character */ 220 #endif 221 #ifdef _OSK 222 short ospeed; 223 char PC_, *UP, *BC; 224 #endif 225 226 extern int quiet; /* If VERY_QUIET, use visual bell for bell */ 227 extern int no_back_scroll; 228 extern int swindow; 229 extern int no_init; 230 extern int quit_at_eof; 231 extern int more_mode; 232 extern int no_keypad; 233 extern int sigs; 234 extern int wscroll; 235 extern int screen_trashed; 236 extern int tty; 237 extern int top_scroll; 238 #if HILITE_SEARCH 239 extern int hilite_search; 240 #endif 241 242 extern char *tgetstr(); 243 extern char *tgoto(); 244 245 246 /* 247 * Change terminal to "raw mode", or restore to "normal" mode. 248 * "Raw mode" means 249 * 1. An outstanding read will complete on receipt of a single keystroke. 250 * 2. Input is not echoed. 251 * 3. On output, \n is mapped to \r\n. 252 * 4. \t is NOT expanded into spaces. 253 * 5. Signal-causing characters such as ctrl-C (interrupt), 254 * etc. are NOT disabled. 255 * It doesn't matter whether an input \n is mapped to \r, or vice versa. 256 */ 257 public void 258 raw_mode(on) 259 int on; 260 { 261 static int curr_on = 0; 262 263 if (on == curr_on) 264 return; 265 erase2_char = '\b'; /* in case OS doesn't know about erase2 */ 266 #if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS 267 { 268 struct termios s; 269 static struct termios save_term; 270 static int saved_term = 0; 271 272 if (on) 273 { 274 /* 275 * Get terminal modes. 276 */ 277 tcgetattr(tty, &s); 278 279 /* 280 * Save modes and set certain variables dependent on modes. 281 */ 282 if (!saved_term) 283 { 284 save_term = s; 285 saved_term = 1; 286 } 287 #if HAVE_OSPEED 288 switch (cfgetospeed(&s)) 289 { 290 #ifdef B0 291 case B0: ospeed = 0; break; 292 #endif 293 #ifdef B50 294 case B50: ospeed = 1; break; 295 #endif 296 #ifdef B75 297 case B75: ospeed = 2; break; 298 #endif 299 #ifdef B110 300 case B110: ospeed = 3; break; 301 #endif 302 #ifdef B134 303 case B134: ospeed = 4; break; 304 #endif 305 #ifdef B150 306 case B150: ospeed = 5; break; 307 #endif 308 #ifdef B200 309 case B200: ospeed = 6; break; 310 #endif 311 #ifdef B300 312 case B300: ospeed = 7; break; 313 #endif 314 #ifdef B600 315 case B600: ospeed = 8; break; 316 #endif 317 #ifdef B1200 318 case B1200: ospeed = 9; break; 319 #endif 320 #ifdef B1800 321 case B1800: ospeed = 10; break; 322 #endif 323 #ifdef B2400 324 case B2400: ospeed = 11; break; 325 #endif 326 #ifdef B4800 327 case B4800: ospeed = 12; break; 328 #endif 329 #ifdef B9600 330 case B9600: ospeed = 13; break; 331 #endif 332 #ifdef EXTA 333 case EXTA: ospeed = 14; break; 334 #endif 335 #ifdef EXTB 336 case EXTB: ospeed = 15; break; 337 #endif 338 #ifdef B57600 339 case B57600: ospeed = 16; break; 340 #endif 341 #ifdef B115200 342 case B115200: ospeed = 17; break; 343 #endif 344 default: ; 345 } 346 #endif 347 erase_char = s.c_cc[VERASE]; 348 #ifdef VERASE2 349 erase2_char = s.c_cc[VERASE2]; 350 #endif 351 kill_char = s.c_cc[VKILL]; 352 #ifdef VWERASE 353 werase_char = s.c_cc[VWERASE]; 354 #else 355 werase_char = CONTROL('W'); 356 #endif 357 358 /* 359 * Set the modes to the way we want them. 360 */ 361 s.c_lflag &= ~(0 362 #ifdef ICANON 363 | ICANON 364 #endif 365 #ifdef ECHO 366 | ECHO 367 #endif 368 #ifdef ECHOE 369 | ECHOE 370 #endif 371 #ifdef ECHOK 372 | ECHOK 373 #endif 374 #if ECHONL 375 | ECHONL 376 #endif 377 ); 378 379 s.c_oflag |= (0 380 #ifdef OXTABS 381 | OXTABS 382 #else 383 #ifdef TAB3 384 | TAB3 385 #else 386 #ifdef XTABS 387 | XTABS 388 #endif 389 #endif 390 #endif 391 #ifdef OPOST 392 | OPOST 393 #endif 394 #ifdef ONLCR 395 | ONLCR 396 #endif 397 ); 398 399 s.c_oflag &= ~(0 400 #ifdef ONOEOT 401 | ONOEOT 402 #endif 403 #ifdef OCRNL 404 | OCRNL 405 #endif 406 #ifdef ONOCR 407 | ONOCR 408 #endif 409 #ifdef ONLRET 410 | ONLRET 411 #endif 412 ); 413 s.c_cc[VMIN] = 1; 414 s.c_cc[VTIME] = 0; 415 #ifdef VLNEXT 416 s.c_cc[VLNEXT] = 0; 417 #endif 418 #ifdef VDSUSP 419 s.c_cc[VDSUSP] = 0; 420 #endif 421 #if MUST_SET_LINE_DISCIPLINE 422 /* 423 * System's termios is broken; need to explicitly 424 * request TERMIODISC line discipline. 425 */ 426 s.c_line = TERMIODISC; 427 #endif 428 } else 429 { 430 /* 431 * Restore saved modes. 432 */ 433 s = save_term; 434 } 435 #if HAVE_FSYNC 436 fsync(tty); 437 #endif 438 tcsetattr(tty, TCSADRAIN, &s); 439 #if MUST_SET_LINE_DISCIPLINE 440 if (!on) 441 { 442 /* 443 * Broken termios *ignores* any line discipline 444 * except TERMIODISC. A different old line discipline 445 * is therefore not restored, yet. Restore the old 446 * line discipline by hand. 447 */ 448 ioctl(tty, TIOCSETD, &save_term.c_line); 449 } 450 #endif 451 } 452 #else 453 #ifdef TCGETA 454 { 455 struct termio s; 456 static struct termio save_term; 457 static int saved_term = 0; 458 459 if (on) 460 { 461 /* 462 * Get terminal modes. 463 */ 464 ioctl(tty, TCGETA, &s); 465 466 /* 467 * Save modes and set certain variables dependent on modes. 468 */ 469 if (!saved_term) 470 { 471 save_term = s; 472 saved_term = 1; 473 } 474 #if HAVE_OSPEED 475 ospeed = s.c_cflag & CBAUD; 476 #endif 477 erase_char = s.c_cc[VERASE]; 478 kill_char = s.c_cc[VKILL]; 479 #ifdef VWERASE 480 werase_char = s.c_cc[VWERASE]; 481 #else 482 werase_char = CONTROL('W'); 483 #endif 484 485 /* 486 * Set the modes to the way we want them. 487 */ 488 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); 489 s.c_oflag |= (OPOST|ONLCR|TAB3); 490 s.c_oflag &= ~(OCRNL|ONOCR|ONLRET); 491 s.c_cc[VMIN] = 1; 492 s.c_cc[VTIME] = 0; 493 } else 494 { 495 /* 496 * Restore saved modes. 497 */ 498 s = save_term; 499 } 500 ioctl(tty, TCSETAW, &s); 501 } 502 #else 503 #ifdef TIOCGETP 504 { 505 struct sgttyb s; 506 static struct sgttyb save_term; 507 static int saved_term = 0; 508 509 if (on) 510 { 511 /* 512 * Get terminal modes. 513 */ 514 ioctl(tty, TIOCGETP, &s); 515 516 /* 517 * Save modes and set certain variables dependent on modes. 518 */ 519 if (!saved_term) 520 { 521 save_term = s; 522 saved_term = 1; 523 } 524 #if HAVE_OSPEED 525 ospeed = s.sg_ospeed; 526 #endif 527 erase_char = s.sg_erase; 528 kill_char = s.sg_kill; 529 werase_char = CONTROL('W'); 530 531 /* 532 * Set the modes to the way we want them. 533 */ 534 s.sg_flags |= CBREAK; 535 s.sg_flags &= ~(ECHO|XTABS); 536 } else 537 { 538 /* 539 * Restore saved modes. 540 */ 541 s = save_term; 542 } 543 ioctl(tty, TIOCSETN, &s); 544 } 545 #else 546 #ifdef _OSK 547 { 548 struct sgbuf s; 549 static struct sgbuf save_term; 550 static int saved_term = 0; 551 552 if (on) 553 { 554 /* 555 * Get terminal modes. 556 */ 557 _gs_opt(tty, &s); 558 559 /* 560 * Save modes and set certain variables dependent on modes. 561 */ 562 if (!saved_term) 563 { 564 save_term = s; 565 saved_term = 1; 566 } 567 erase_char = s.sg_bspch; 568 kill_char = s.sg_dlnch; 569 werase_char = CONTROL('W'); 570 571 /* 572 * Set the modes to the way we want them. 573 */ 574 s.sg_echo = 0; 575 s.sg_eofch = 0; 576 s.sg_pause = 0; 577 s.sg_psch = 0; 578 } else 579 { 580 /* 581 * Restore saved modes. 582 */ 583 s = save_term; 584 } 585 _ss_opt(tty, &s); 586 } 587 #else 588 /* MS-DOS, Windows, or OS2 */ 589 #if OS2 590 /* OS2 */ 591 LSIGNAL(SIGINT, SIG_IGN); 592 #endif 593 erase_char = '\b'; 594 #if MSDOS_COMPILER==DJGPPC 595 kill_char = CONTROL('U'); 596 /* 597 * So that when we shell out or run another program, its 598 * stdin is in cooked mode. We do not switch stdin to binary 599 * mode if fd0 is zero, since that means we were called before 600 * tty was reopened in open_getchr, in which case we would be 601 * changing the original stdin device outside less. 602 */ 603 if (fd0 != 0) 604 setmode(0, on ? O_BINARY : O_TEXT); 605 #else 606 kill_char = ESC; 607 #endif 608 werase_char = CONTROL('W'); 609 #endif 610 #endif 611 #endif 612 #endif 613 curr_on = on; 614 } 615 616 #if !MSDOS_COMPILER 617 /* 618 * Some glue to prevent calling termcap functions if tgetent() failed. 619 */ 620 static int hardcopy; 621 622 static char * 623 ltget_env(capname) 624 char *capname; 625 { 626 char name[16]; 627 628 strcpy(name, "LESS_TERMCAP_"); 629 strcat(name, capname); 630 return (lgetenv(name)); 631 } 632 633 static int 634 ltgetflag(capname) 635 char *capname; 636 { 637 char *s; 638 639 if ((s = ltget_env(capname)) != NULL) 640 return (*s != '\0' && *s != '0'); 641 if (hardcopy) 642 return (0); 643 return (tgetflag(capname)); 644 } 645 646 static int 647 ltgetnum(capname) 648 char *capname; 649 { 650 char *s; 651 652 if ((s = ltget_env(capname)) != NULL) 653 return (atoi(s)); 654 if (hardcopy) 655 return (-1); 656 return (tgetnum(capname)); 657 } 658 659 static char * 660 ltgetstr(capname, pp) 661 char *capname; 662 char **pp; 663 { 664 char *s; 665 666 if ((s = ltget_env(capname)) != NULL) 667 return (s); 668 if (hardcopy) 669 return (NULL); 670 return (tgetstr(capname, pp)); 671 } 672 #endif /* MSDOS_COMPILER */ 673 674 /* 675 * Get size of the output screen. 676 */ 677 public void 678 scrsize() 679 { 680 register char *s; 681 int sys_height; 682 int sys_width; 683 #if !MSDOS_COMPILER 684 int n; 685 #endif 686 687 #define DEF_SC_WIDTH 80 688 #if MSDOS_COMPILER 689 #define DEF_SC_HEIGHT 25 690 #else 691 #define DEF_SC_HEIGHT 24 692 #endif 693 694 695 sys_width = sys_height = 0; 696 697 #if MSDOS_COMPILER==MSOFTC 698 { 699 struct videoconfig w; 700 _getvideoconfig(&w); 701 sys_height = w.numtextrows; 702 sys_width = w.numtextcols; 703 } 704 #else 705 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 706 { 707 struct text_info w; 708 gettextinfo(&w); 709 sys_height = w.screenheight; 710 sys_width = w.screenwidth; 711 } 712 #else 713 #if MSDOS_COMPILER==WIN32C 714 { 715 CONSOLE_SCREEN_BUFFER_INFO scr; 716 GetConsoleScreenBufferInfo(con_out, &scr); 717 sys_height = scr.srWindow.Bottom - scr.srWindow.Top + 1; 718 sys_width = scr.srWindow.Right - scr.srWindow.Left + 1; 719 } 720 #else 721 #if OS2 722 { 723 int s[2]; 724 _scrsize(s); 725 sys_width = s[0]; 726 sys_height = s[1]; 727 /* 728 * When using terminal emulators for XFree86/OS2, the 729 * _scrsize function does not work well. 730 * Call the scrsize.exe program to get the window size. 731 */ 732 windowid = getenv("WINDOWID"); 733 if (windowid != NULL) 734 { 735 FILE *fd = popen("scrsize", "rt"); 736 if (fd != NULL) 737 { 738 int w, h; 739 fscanf(fd, "%i %i", &w, &h); 740 if (w > 0 && h > 0) 741 { 742 sys_width = w; 743 sys_height = h; 744 } 745 pclose(fd); 746 } 747 } 748 } 749 #else 750 #ifdef TIOCGWINSZ 751 { 752 struct winsize w; 753 if (ioctl(2, TIOCGWINSZ, &w) == 0) 754 { 755 if (w.ws_row > 0) 756 sys_height = w.ws_row; 757 if (w.ws_col > 0) 758 sys_width = w.ws_col; 759 } 760 } 761 #else 762 #ifdef WIOCGETD 763 { 764 struct uwdata w; 765 if (ioctl(2, WIOCGETD, &w) == 0) 766 { 767 if (w.uw_height > 0) 768 sys_height = w.uw_height / w.uw_vs; 769 if (w.uw_width > 0) 770 sys_width = w.uw_width / w.uw_hs; 771 } 772 } 773 #endif 774 #endif 775 #endif 776 #endif 777 #endif 778 #endif 779 780 if (sys_height > 0) 781 sc_height = sys_height; 782 else if ((s = lgetenv("LINES")) != NULL) 783 sc_height = atoi(s); 784 #if !MSDOS_COMPILER 785 else if ((n = ltgetnum("li")) > 0) 786 sc_height = n; 787 #endif 788 else 789 sc_height = DEF_SC_HEIGHT; 790 791 if (sys_width > 0) 792 sc_width = sys_width; 793 else if ((s = lgetenv("COLUMNS")) != NULL) 794 sc_width = atoi(s); 795 #if !MSDOS_COMPILER 796 else if ((n = ltgetnum("co")) > 0) 797 sc_width = n; 798 #endif 799 else 800 sc_width = DEF_SC_WIDTH; 801 } 802 803 #if MSDOS_COMPILER==MSOFTC 804 /* 805 * Figure out how many empty loops it takes to delay a millisecond. 806 */ 807 static void 808 get_clock() 809 { 810 clock_t start; 811 812 /* 813 * Get synchronized at the start of a tick. 814 */ 815 start = clock(); 816 while (clock() == start) 817 ; 818 /* 819 * Now count loops till the next tick. 820 */ 821 start = clock(); 822 msec_loops = 0; 823 while (clock() == start) 824 msec_loops++; 825 /* 826 * Convert from (loops per clock) to (loops per millisecond). 827 */ 828 msec_loops *= CLOCKS_PER_SEC; 829 msec_loops /= 1000; 830 } 831 832 /* 833 * Delay for a specified number of milliseconds. 834 */ 835 static void 836 dummy_func() 837 { 838 static long delay_dummy = 0; 839 delay_dummy++; 840 } 841 842 static void 843 delay(msec) 844 int msec; 845 { 846 long i; 847 848 while (msec-- > 0) 849 { 850 for (i = 0; i < msec_loops; i++) 851 { 852 /* 853 * Make it look like we're doing something here, 854 * so the optimizer doesn't remove the whole loop. 855 */ 856 dummy_func(); 857 } 858 } 859 } 860 #endif 861 862 /* 863 * Return the characters actually input by a "special" key. 864 */ 865 public char * 866 special_key_str(key) 867 int key; 868 { 869 static char tbuf[40]; 870 char *s; 871 #if MSDOS_COMPILER || OS2 872 static char k_right[] = { '\340', PCK_RIGHT, 0 }; 873 static char k_left[] = { '\340', PCK_LEFT, 0 }; 874 static char k_ctl_right[] = { '\340', PCK_CTL_RIGHT, 0 }; 875 static char k_ctl_left[] = { '\340', PCK_CTL_LEFT, 0 }; 876 static char k_insert[] = { '\340', PCK_INSERT, 0 }; 877 static char k_delete[] = { '\340', PCK_DELETE, 0 }; 878 static char k_ctl_delete[] = { '\340', PCK_CTL_DELETE, 0 }; 879 static char k_ctl_backspace[] = { '\177', 0 }; 880 static char k_home[] = { '\340', PCK_HOME, 0 }; 881 static char k_end[] = { '\340', PCK_END, 0 }; 882 static char k_up[] = { '\340', PCK_UP, 0 }; 883 static char k_down[] = { '\340', PCK_DOWN, 0 }; 884 static char k_backtab[] = { '\340', PCK_SHIFT_TAB, 0 }; 885 static char k_pagedown[] = { '\340', PCK_PAGEDOWN, 0 }; 886 static char k_pageup[] = { '\340', PCK_PAGEUP, 0 }; 887 static char k_f1[] = { '\340', PCK_F1, 0 }; 888 #endif 889 #if !MSDOS_COMPILER 890 char *sp = tbuf; 891 #endif 892 893 switch (key) 894 { 895 #if OS2 896 /* 897 * If windowid is not NULL, assume less is executed in 898 * the XFree86 environment. 899 */ 900 case SK_RIGHT_ARROW: 901 s = windowid ? ltgetstr("kr", &sp) : k_right; 902 break; 903 case SK_LEFT_ARROW: 904 s = windowid ? ltgetstr("kl", &sp) : k_left; 905 break; 906 case SK_UP_ARROW: 907 s = windowid ? ltgetstr("ku", &sp) : k_up; 908 break; 909 case SK_DOWN_ARROW: 910 s = windowid ? ltgetstr("kd", &sp) : k_down; 911 break; 912 case SK_PAGE_UP: 913 s = windowid ? ltgetstr("kP", &sp) : k_pageup; 914 break; 915 case SK_PAGE_DOWN: 916 s = windowid ? ltgetstr("kN", &sp) : k_pagedown; 917 break; 918 case SK_HOME: 919 s = windowid ? ltgetstr("kh", &sp) : k_home; 920 break; 921 case SK_END: 922 s = windowid ? ltgetstr("@7", &sp) : k_end; 923 break; 924 case SK_DELETE: 925 if (windowid) 926 { 927 s = ltgetstr("kD", &sp); 928 if (s == NULL) 929 { 930 tbuf[0] = '\177'; 931 tbuf[1] = '\0'; 932 s = tbuf; 933 } 934 } else 935 s = k_delete; 936 break; 937 #endif 938 #if MSDOS_COMPILER 939 case SK_RIGHT_ARROW: 940 s = k_right; 941 break; 942 case SK_LEFT_ARROW: 943 s = k_left; 944 break; 945 case SK_UP_ARROW: 946 s = k_up; 947 break; 948 case SK_DOWN_ARROW: 949 s = k_down; 950 break; 951 case SK_PAGE_UP: 952 s = k_pageup; 953 break; 954 case SK_PAGE_DOWN: 955 s = k_pagedown; 956 break; 957 case SK_HOME: 958 s = k_home; 959 break; 960 case SK_END: 961 s = k_end; 962 break; 963 case SK_DELETE: 964 s = k_delete; 965 break; 966 #endif 967 #if MSDOS_COMPILER || OS2 968 case SK_INSERT: 969 s = k_insert; 970 break; 971 case SK_CTL_LEFT_ARROW: 972 s = k_ctl_left; 973 break; 974 case SK_CTL_RIGHT_ARROW: 975 s = k_ctl_right; 976 break; 977 case SK_CTL_BACKSPACE: 978 s = k_ctl_backspace; 979 break; 980 case SK_CTL_DELETE: 981 s = k_ctl_delete; 982 break; 983 case SK_F1: 984 s = k_f1; 985 break; 986 case SK_BACKTAB: 987 s = k_backtab; 988 break; 989 #else 990 case SK_RIGHT_ARROW: 991 s = ltgetstr("kr", &sp); 992 break; 993 case SK_LEFT_ARROW: 994 s = ltgetstr("kl", &sp); 995 break; 996 case SK_UP_ARROW: 997 s = ltgetstr("ku", &sp); 998 break; 999 case SK_DOWN_ARROW: 1000 s = ltgetstr("kd", &sp); 1001 break; 1002 case SK_PAGE_UP: 1003 s = ltgetstr("kP", &sp); 1004 break; 1005 case SK_PAGE_DOWN: 1006 s = ltgetstr("kN", &sp); 1007 break; 1008 case SK_HOME: 1009 s = ltgetstr("kh", &sp); 1010 break; 1011 case SK_END: 1012 s = ltgetstr("@7", &sp); 1013 break; 1014 case SK_DELETE: 1015 s = ltgetstr("kD", &sp); 1016 if (s == NULL) 1017 { 1018 tbuf[0] = '\177'; 1019 tbuf[1] = '\0'; 1020 s = tbuf; 1021 } 1022 break; 1023 #endif 1024 case SK_CONTROL_K: 1025 tbuf[0] = CONTROL('K'); 1026 tbuf[1] = '\0'; 1027 s = tbuf; 1028 break; 1029 default: 1030 return (NULL); 1031 } 1032 return (s); 1033 } 1034 1035 /* 1036 * Get terminal capabilities via termcap. 1037 */ 1038 public void 1039 get_term() 1040 { 1041 #if MSDOS_COMPILER 1042 auto_wrap = 1; 1043 ignaw = 0; 1044 can_goto_line = 1; 1045 clear_bg = 1; 1046 /* 1047 * Set up default colors. 1048 * The xx_s_width and xx_e_width vars are already initialized to 0. 1049 */ 1050 #if MSDOS_COMPILER==MSOFTC 1051 sy_bg_color = _getbkcolor(); 1052 sy_fg_color = _gettextcolor(); 1053 get_clock(); 1054 #else 1055 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 1056 { 1057 struct text_info w; 1058 gettextinfo(&w); 1059 sy_bg_color = (w.attribute >> 4) & 0x0F; 1060 sy_fg_color = (w.attribute >> 0) & 0x0F; 1061 } 1062 #else 1063 #if MSDOS_COMPILER==WIN32C 1064 { 1065 DWORD nread; 1066 CONSOLE_SCREEN_BUFFER_INFO scr; 1067 1068 con_out_save = con_out = GetStdHandle(STD_OUTPUT_HANDLE); 1069 /* 1070 * Always open stdin in binary. Note this *must* be done 1071 * before any file operations have been done on fd0. 1072 */ 1073 SET_BINARY(0); 1074 GetConsoleScreenBufferInfo(con_out, &scr); 1075 ReadConsoleOutputAttribute(con_out, &curr_attr, 1076 1, scr.dwCursorPosition, &nread); 1077 sy_bg_color = (curr_attr & BG_COLORS) >> 4; /* normalize */ 1078 sy_fg_color = curr_attr & FG_COLORS; 1079 } 1080 #endif 1081 #endif 1082 #endif 1083 nm_fg_color = sy_fg_color; 1084 nm_bg_color = sy_bg_color; 1085 bo_fg_color = 11; 1086 bo_bg_color = 0; 1087 ul_fg_color = 9; 1088 ul_bg_color = 0; 1089 so_fg_color = 15; 1090 so_bg_color = 9; 1091 bl_fg_color = 15; 1092 bl_bg_color = 0; 1093 1094 /* 1095 * Get size of the screen. 1096 */ 1097 scrsize(); 1098 pos_init(); 1099 1100 1101 #else /* !MSDOS_COMPILER */ 1102 1103 char *sp; 1104 register char *t1, *t2; 1105 char *term; 1106 char termbuf[TERMBUF_SIZE]; 1107 1108 static char sbuf[TERMSBUF_SIZE]; 1109 1110 #if OS2 1111 /* 1112 * Make sure the termcap database is available. 1113 */ 1114 sp = lgetenv("TERMCAP"); 1115 if (sp == NULL || *sp == '\0') 1116 { 1117 char *termcap; 1118 if ((sp = homefile("termcap.dat")) != NULL) 1119 { 1120 termcap = (char *) ecalloc(strlen(sp)+9, sizeof(char)); 1121 sprintf(termcap, "TERMCAP=%s", sp); 1122 free(sp); 1123 putenv(termcap); 1124 } 1125 } 1126 #endif 1127 /* 1128 * Find out what kind of terminal this is. 1129 */ 1130 if ((term = lgetenv("TERM")) == NULL) 1131 term = DEFAULT_TERM; 1132 hardcopy = 0; 1133 if (tgetent(termbuf, term) <= 0) 1134 hardcopy = 1; 1135 if (ltgetflag("hc")) 1136 hardcopy = 1; 1137 1138 /* 1139 * Get size of the screen. 1140 */ 1141 scrsize(); 1142 pos_init(); 1143 1144 auto_wrap = ltgetflag("am"); 1145 ignaw = ltgetflag("xn"); 1146 above_mem = ltgetflag("da"); 1147 below_mem = ltgetflag("db"); 1148 clear_bg = ltgetflag("ut"); 1149 1150 /* 1151 * Assumes termcap variable "sg" is the printing width of: 1152 * the standout sequence, the end standout sequence, 1153 * the underline sequence, the end underline sequence, 1154 * the boldface sequence, and the end boldface sequence. 1155 */ 1156 if ((so_s_width = ltgetnum("sg")) < 0) 1157 so_s_width = 0; 1158 so_e_width = so_s_width; 1159 1160 bo_s_width = bo_e_width = so_s_width; 1161 ul_s_width = ul_e_width = so_s_width; 1162 bl_s_width = bl_e_width = so_s_width; 1163 1164 #if HILITE_SEARCH 1165 if (so_s_width > 0 || so_e_width > 0) 1166 /* 1167 * Disable highlighting by default on magic cookie terminals. 1168 * Turning on highlighting might change the displayed width 1169 * of a line, causing the display to get messed up. 1170 * The user can turn it back on with -g, 1171 * but she won't like the results. 1172 */ 1173 hilite_search = 0; 1174 #endif 1175 1176 /* 1177 * Get various string-valued capabilities. 1178 */ 1179 sp = sbuf; 1180 1181 #if HAVE_OSPEED 1182 sc_pad = ltgetstr("pc", &sp); 1183 if (sc_pad != NULL) 1184 PC = *sc_pad; 1185 #endif 1186 1187 sc_s_keypad = ltgetstr("ks", &sp); 1188 if (sc_s_keypad == NULL) 1189 sc_s_keypad = ""; 1190 sc_e_keypad = ltgetstr("ke", &sp); 1191 if (sc_e_keypad == NULL) 1192 sc_e_keypad = ""; 1193 1194 /* 1195 * This loses for terminals with termcap entries with ti/te strings 1196 * that switch to/from an alternate screen, and we're in quit_at_eof 1197 * (eg, more(1)). 1198 */ 1199 if (!quit_at_eof && !more_mode) { 1200 sc_init = ltgetstr("ti", &sp); 1201 sc_deinit = ltgetstr("te", &sp); 1202 } 1203 1204 if (sc_init == NULL) 1205 sc_init = ""; 1206 1207 if (sc_deinit == NULL) 1208 sc_deinit = ""; 1209 1210 sc_eol_clear = ltgetstr("ce", &sp); 1211 if (sc_eol_clear == NULL || *sc_eol_clear == '\0') 1212 { 1213 missing_cap = 1; 1214 sc_eol_clear = ""; 1215 } 1216 1217 sc_eos_clear = ltgetstr("cd", &sp); 1218 if (below_mem && (sc_eos_clear == NULL || *sc_eos_clear == '\0')) 1219 { 1220 missing_cap = 1; 1221 sc_eos_clear = ""; 1222 } 1223 1224 sc_clear = ltgetstr("cl", &sp); 1225 if (sc_clear == NULL || *sc_clear == '\0') 1226 { 1227 missing_cap = 1; 1228 sc_clear = "\n\n"; 1229 } 1230 1231 sc_move = ltgetstr("cm", &sp); 1232 if (sc_move == NULL || *sc_move == '\0') 1233 { 1234 /* 1235 * This is not an error here, because we don't 1236 * always need sc_move. 1237 * We need it only if we don't have home or lower-left. 1238 */ 1239 sc_move = ""; 1240 can_goto_line = 0; 1241 } else 1242 can_goto_line = 1; 1243 1244 tmodes("so", "se", &sc_s_in, &sc_s_out, "", "", &sp); 1245 tmodes("us", "ue", &sc_u_in, &sc_u_out, sc_s_in, sc_s_out, &sp); 1246 tmodes("md", "me", &sc_b_in, &sc_b_out, sc_s_in, sc_s_out, &sp); 1247 tmodes("mb", "me", &sc_bl_in, &sc_bl_out, sc_s_in, sc_s_out, &sp); 1248 1249 sc_visual_bell = ltgetstr("vb", &sp); 1250 if (sc_visual_bell == NULL) 1251 sc_visual_bell = ""; 1252 1253 if (ltgetflag("bs")) 1254 sc_backspace = "\b"; 1255 else 1256 { 1257 sc_backspace = ltgetstr("bc", &sp); 1258 if (sc_backspace == NULL || *sc_backspace == '\0') 1259 sc_backspace = "\b"; 1260 } 1261 1262 /* 1263 * Choose between using "ho" and "cm" ("home" and "cursor move") 1264 * to move the cursor to the upper left corner of the screen. 1265 */ 1266 t1 = ltgetstr("ho", &sp); 1267 if (t1 == NULL) 1268 t1 = ""; 1269 if (*sc_move == '\0') 1270 t2 = ""; 1271 else 1272 { 1273 strcpy(sp, tgoto(sc_move, 0, 0)); 1274 t2 = sp; 1275 sp += strlen(sp) + 1; 1276 } 1277 sc_home = cheaper(t1, t2, "|\b^"); 1278 1279 /* 1280 * Choose between using "ll" and "cm" ("lower left" and "cursor move") 1281 * to move the cursor to the lower left corner of the screen. 1282 */ 1283 t1 = ltgetstr("ll", &sp); 1284 if (t1 == NULL) 1285 t1 = ""; 1286 if (*sc_move == '\0') 1287 t2 = ""; 1288 else 1289 { 1290 strcpy(sp, tgoto(sc_move, 0, sc_height-1)); 1291 t2 = sp; 1292 sp += strlen(sp) + 1; 1293 } 1294 sc_lower_left = cheaper(t1, t2, "\r"); 1295 1296 /* 1297 * Choose between using "al" or "sr" ("add line" or "scroll reverse") 1298 * to add a line at the top of the screen. 1299 */ 1300 t1 = ltgetstr("al", &sp); 1301 if (t1 == NULL) 1302 t1 = ""; 1303 t2 = ltgetstr("sr", &sp); 1304 if (t2 == NULL) 1305 t2 = ""; 1306 #if OS2 1307 if (*t1 == '\0' && *t2 == '\0') 1308 sc_addline = ""; 1309 else 1310 #endif 1311 if (above_mem) 1312 sc_addline = t1; 1313 else 1314 sc_addline = cheaper(t1, t2, ""); 1315 if (*sc_addline == '\0') 1316 { 1317 /* 1318 * Force repaint on any backward movement. 1319 */ 1320 no_back_scroll = 1; 1321 } 1322 #endif /* MSDOS_COMPILER */ 1323 } 1324 1325 #if !MSDOS_COMPILER 1326 /* 1327 * Return the cost of displaying a termcap string. 1328 * We use the trick of calling tputs, but as a char printing function 1329 * we give it inc_costcount, which just increments "costcount". 1330 * This tells us how many chars would be printed by using this string. 1331 * {{ Couldn't we just use strlen? }} 1332 */ 1333 static int costcount; 1334 1335 /*ARGSUSED*/ 1336 static int 1337 inc_costcount(c) 1338 int c; 1339 { 1340 costcount++; 1341 return (c); 1342 } 1343 1344 static int 1345 cost(t) 1346 char *t; 1347 { 1348 costcount = 0; 1349 tputs(t, sc_height, inc_costcount); 1350 return (costcount); 1351 } 1352 1353 /* 1354 * Return the "best" of the two given termcap strings. 1355 * The best, if both exist, is the one with the lower 1356 * cost (see cost() function). 1357 */ 1358 static char * 1359 cheaper(t1, t2, def) 1360 char *t1, *t2; 1361 char *def; 1362 { 1363 if (*t1 == '\0' && *t2 == '\0') 1364 { 1365 missing_cap = 1; 1366 return (def); 1367 } 1368 if (*t1 == '\0') 1369 return (t2); 1370 if (*t2 == '\0') 1371 return (t1); 1372 if (cost(t1) < cost(t2)) 1373 return (t1); 1374 return (t2); 1375 } 1376 1377 static void 1378 tmodes(incap, outcap, instr, outstr, def_instr, def_outstr, spp) 1379 char *incap; 1380 char *outcap; 1381 char **instr; 1382 char **outstr; 1383 char *def_instr; 1384 char *def_outstr; 1385 char **spp; 1386 { 1387 *instr = ltgetstr(incap, spp); 1388 if (*instr == NULL) 1389 { 1390 /* Use defaults. */ 1391 *instr = def_instr; 1392 *outstr = def_outstr; 1393 return; 1394 } 1395 1396 *outstr = ltgetstr(outcap, spp); 1397 if (*outstr == NULL) 1398 /* No specific out capability; use "me". */ 1399 *outstr = ltgetstr("me", spp); 1400 if (*outstr == NULL) 1401 /* Don't even have "me"; use a null string. */ 1402 *outstr = ""; 1403 } 1404 1405 #endif /* MSDOS_COMPILER */ 1406 1407 1408 /* 1409 * Below are the functions which perform all the 1410 * terminal-specific screen manipulation. 1411 */ 1412 1413 1414 #if MSDOS_COMPILER 1415 1416 #if MSDOS_COMPILER==WIN32C 1417 static void 1418 _settextposition(int row, int col) 1419 { 1420 COORD cpos; 1421 CONSOLE_SCREEN_BUFFER_INFO csbi; 1422 1423 GetConsoleScreenBufferInfo(con_out, &csbi); 1424 cpos.X = csbi.srWindow.Left + (col - 1); 1425 cpos.Y = csbi.srWindow.Top + (row - 1); 1426 SetConsoleCursorPosition(con_out, cpos); 1427 } 1428 #endif 1429 1430 /* 1431 * Initialize the screen to the correct color at startup. 1432 */ 1433 static void 1434 initcolor() 1435 { 1436 SETCOLORS(nm_fg_color, nm_bg_color); 1437 #if 0 1438 /* 1439 * This clears the screen at startup. This is different from 1440 * the behavior of other versions of less. Disable it for now. 1441 */ 1442 char *blanks; 1443 int row; 1444 int col; 1445 1446 /* 1447 * Create a complete, blank screen using "normal" colors. 1448 */ 1449 SETCOLORS(nm_fg_color, nm_bg_color); 1450 blanks = (char *) ecalloc(width+1, sizeof(char)); 1451 for (col = 0; col < sc_width; col++) 1452 blanks[col] = ' '; 1453 blanks[sc_width] = '\0'; 1454 for (row = 0; row < sc_height; row++) 1455 _outtext(blanks); 1456 free(blanks); 1457 #endif 1458 } 1459 #endif 1460 1461 #if MSDOS_COMPILER==WIN32C 1462 1463 /* 1464 * Termcap-like init with a private win32 console. 1465 */ 1466 static void 1467 win32_init_term() 1468 { 1469 CONSOLE_SCREEN_BUFFER_INFO scr; 1470 COORD size; 1471 1472 if (con_out_save == INVALID_HANDLE_VALUE) 1473 return; 1474 1475 GetConsoleScreenBufferInfo(con_out_save, &scr); 1476 1477 if (con_out_ours == INVALID_HANDLE_VALUE) 1478 { 1479 /* 1480 * Create our own screen buffer, so that we 1481 * may restore the original when done. 1482 */ 1483 con_out_ours = CreateConsoleScreenBuffer( 1484 GENERIC_WRITE | GENERIC_READ, 1485 FILE_SHARE_WRITE | FILE_SHARE_READ, 1486 (LPSECURITY_ATTRIBUTES) NULL, 1487 CONSOLE_TEXTMODE_BUFFER, 1488 (LPVOID) NULL); 1489 } 1490 1491 size.X = scr.srWindow.Right - scr.srWindow.Left + 1; 1492 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1; 1493 SetConsoleScreenBufferSize(con_out_ours, size); 1494 SetConsoleActiveScreenBuffer(con_out_ours); 1495 con_out = con_out_ours; 1496 } 1497 1498 /* 1499 * Restore the startup console. 1500 */ 1501 static void 1502 win32_deinit_term() 1503 { 1504 if (con_out_save == INVALID_HANDLE_VALUE) 1505 return; 1506 if (quitting) 1507 (void) CloseHandle(con_out_ours); 1508 SetConsoleActiveScreenBuffer(con_out_save); 1509 con_out = con_out_save; 1510 } 1511 1512 #endif 1513 1514 /* 1515 * Initialize terminal 1516 */ 1517 public void 1518 init() 1519 { 1520 #if !MSDOS_COMPILER 1521 if (!no_init) 1522 tputs(sc_init, sc_height, putchr); 1523 if (!no_keypad) 1524 tputs(sc_s_keypad, sc_height, putchr); 1525 if (top_scroll) 1526 { 1527 int i; 1528 1529 /* 1530 * This is nice to terminals with no alternate screen, 1531 * but with saved scrolled-off-the-top lines. This way, 1532 * no previous line is lost, but we start with a whole 1533 * screen to ourself. 1534 */ 1535 for (i = 1; i < sc_height; i++) 1536 putchr('\n'); 1537 } 1538 #else 1539 #if MSDOS_COMPILER==WIN32C 1540 if (!no_init) 1541 win32_init_term(); 1542 #endif 1543 initcolor(); 1544 flush(); 1545 #endif 1546 init_done = 1; 1547 } 1548 1549 /* 1550 * Deinitialize terminal 1551 */ 1552 public void 1553 deinit() 1554 { 1555 if (!init_done) 1556 return; 1557 #if !MSDOS_COMPILER 1558 if (!no_keypad) 1559 tputs(sc_e_keypad, sc_height, putchr); 1560 if (!no_init) 1561 tputs(sc_deinit, sc_height, putchr); 1562 #else 1563 /* Restore system colors. */ 1564 SETCOLORS(sy_fg_color, sy_bg_color); 1565 #if MSDOS_COMPILER==WIN32C 1566 if (!no_init) 1567 win32_deinit_term(); 1568 #else 1569 /* Need clreol to make SETCOLORS take effect. */ 1570 clreol(); 1571 #endif 1572 #endif 1573 init_done = 0; 1574 } 1575 1576 /* 1577 * Home cursor (move to upper left corner of screen). 1578 */ 1579 public void 1580 home() 1581 { 1582 #if !MSDOS_COMPILER 1583 tputs(sc_home, 1, putchr); 1584 #else 1585 flush(); 1586 _settextposition(1,1); 1587 #endif 1588 } 1589 1590 /* 1591 * Add a blank line (called with cursor at home). 1592 * Should scroll the display down. 1593 */ 1594 public void 1595 add_line() 1596 { 1597 #if !MSDOS_COMPILER 1598 tputs(sc_addline, sc_height, putchr); 1599 #else 1600 flush(); 1601 #if MSDOS_COMPILER==MSOFTC 1602 _scrolltextwindow(_GSCROLLDOWN); 1603 _settextposition(1,1); 1604 #else 1605 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 1606 movetext(1,1, sc_width,sc_height-1, 1,2); 1607 gotoxy(1,1); 1608 clreol(); 1609 #else 1610 #if MSDOS_COMPILER==WIN32C 1611 { 1612 CHAR_INFO fillchar; 1613 SMALL_RECT rcSrc, rcClip; 1614 COORD new_org; 1615 CONSOLE_SCREEN_BUFFER_INFO csbi; 1616 1617 GetConsoleScreenBufferInfo(con_out,&csbi); 1618 1619 /* The clip rectangle is the entire visible screen. */ 1620 rcClip.Left = csbi.srWindow.Left; 1621 rcClip.Top = csbi.srWindow.Top; 1622 rcClip.Right = csbi.srWindow.Right; 1623 rcClip.Bottom = csbi.srWindow.Bottom; 1624 1625 /* The source rectangle is the visible screen minus the last line. */ 1626 rcSrc = rcClip; 1627 rcSrc.Bottom--; 1628 1629 /* Move the top left corner of the source window down one row. */ 1630 new_org.X = rcSrc.Left; 1631 new_org.Y = rcSrc.Top + 1; 1632 1633 /* Fill the right character and attributes. */ 1634 fillchar.Char.AsciiChar = ' '; 1635 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 1636 fillchar.Attributes = curr_attr; 1637 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); 1638 _settextposition(1,1); 1639 } 1640 #endif 1641 #endif 1642 #endif 1643 #endif 1644 } 1645 1646 #if 0 1647 /* 1648 * Remove the n topmost lines and scroll everything below it in the 1649 * window upward. This is needed to stop leaking the topmost line 1650 * into the scrollback buffer when we go down-one-line (in WIN32). 1651 */ 1652 public void 1653 remove_top(n) 1654 int n; 1655 { 1656 #if MSDOS_COMPILER==WIN32C 1657 SMALL_RECT rcSrc, rcClip; 1658 CHAR_INFO fillchar; 1659 COORD new_org; 1660 CONSOLE_SCREEN_BUFFER_INFO csbi; /* to get buffer info */ 1661 1662 if (n >= sc_height - 1) 1663 { 1664 clear(); 1665 home(); 1666 return; 1667 } 1668 1669 flush(); 1670 1671 GetConsoleScreenBufferInfo(con_out, &csbi); 1672 1673 /* Get the extent of all-visible-rows-but-the-last. */ 1674 rcSrc.Left = csbi.srWindow.Left; 1675 rcSrc.Top = csbi.srWindow.Top + n; 1676 rcSrc.Right = csbi.srWindow.Right; 1677 rcSrc.Bottom = csbi.srWindow.Bottom; 1678 1679 /* Get the clip rectangle. */ 1680 rcClip.Left = rcSrc.Left; 1681 rcClip.Top = csbi.srWindow.Top; 1682 rcClip.Right = rcSrc.Right; 1683 rcClip.Bottom = rcSrc.Bottom ; 1684 1685 /* Move the source window up n rows. */ 1686 new_org.X = rcSrc.Left; 1687 new_org.Y = rcSrc.Top - n; 1688 1689 /* Fill the right character and attributes. */ 1690 fillchar.Char.AsciiChar = ' '; 1691 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 1692 fillchar.Attributes = curr_attr; 1693 1694 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); 1695 1696 /* Position cursor on first blank line. */ 1697 goto_line(sc_height - n - 1); 1698 #endif 1699 } 1700 #endif 1701 1702 #if MSDOS_COMPILER==WIN32C 1703 /* 1704 * Clear the screen. 1705 */ 1706 static void 1707 win32_clear() 1708 { 1709 /* 1710 * This will clear only the currently visible rows of the NT 1711 * console buffer, which means none of the precious scrollback 1712 * rows are touched making for faster scrolling. Note that, if 1713 * the window has fewer columns than the console buffer (i.e. 1714 * there is a horizontal scrollbar as well), the entire width 1715 * of the visible rows will be cleared. 1716 */ 1717 COORD topleft; 1718 DWORD nchars; 1719 DWORD winsz; 1720 CONSOLE_SCREEN_BUFFER_INFO csbi; 1721 1722 /* get the number of cells in the current buffer */ 1723 GetConsoleScreenBufferInfo(con_out, &csbi); 1724 winsz = csbi.dwSize.X * (csbi.srWindow.Bottom - csbi.srWindow.Top + 1); 1725 topleft.X = 0; 1726 topleft.Y = csbi.srWindow.Top; 1727 1728 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 1729 FillConsoleOutputCharacter(con_out, ' ', winsz, topleft, &nchars); 1730 FillConsoleOutputAttribute(con_out, curr_attr, winsz, topleft, &nchars); 1731 } 1732 1733 /* 1734 * Remove the n topmost lines and scroll everything below it in the 1735 * window upward. 1736 */ 1737 public void 1738 win32_scroll_up(n) 1739 int n; 1740 { 1741 SMALL_RECT rcSrc, rcClip; 1742 CHAR_INFO fillchar; 1743 COORD topleft; 1744 COORD new_org; 1745 DWORD nchars; 1746 DWORD size; 1747 CONSOLE_SCREEN_BUFFER_INFO csbi; 1748 1749 if (n <= 0) 1750 return; 1751 1752 if (n >= sc_height - 1) 1753 { 1754 win32_clear(); 1755 _settextposition(1,1); 1756 return; 1757 } 1758 1759 /* Get the extent of what will remain visible after scrolling. */ 1760 GetConsoleScreenBufferInfo(con_out, &csbi); 1761 rcSrc.Left = csbi.srWindow.Left; 1762 rcSrc.Top = csbi.srWindow.Top + n; 1763 rcSrc.Right = csbi.srWindow.Right; 1764 rcSrc.Bottom = csbi.srWindow.Bottom; 1765 1766 /* Get the clip rectangle. */ 1767 rcClip.Left = rcSrc.Left; 1768 rcClip.Top = csbi.srWindow.Top; 1769 rcClip.Right = rcSrc.Right; 1770 rcClip.Bottom = rcSrc.Bottom ; 1771 1772 /* Move the source text to the top of the screen. */ 1773 new_org.X = rcSrc.Left; 1774 new_org.Y = 0; 1775 1776 /* Fill the right character and attributes. */ 1777 fillchar.Char.AsciiChar = ' '; 1778 fillchar.Attributes = MAKEATTR(nm_fg_color, nm_bg_color); 1779 1780 /* Scroll the window. */ 1781 SetConsoleTextAttribute(con_out, fillchar.Attributes); 1782 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); 1783 1784 /* Clear remaining lines at bottom. */ 1785 topleft.X = csbi.dwCursorPosition.X; 1786 topleft.Y = rcSrc.Bottom - n; 1787 size = (n * csbi.dwSize.X) + (rcSrc.Right - topleft.X); 1788 FillConsoleOutputCharacter(con_out, ' ', size, topleft, 1789 &nchars); 1790 FillConsoleOutputAttribute(con_out, fillchar.Attributes, size, topleft, 1791 &nchars); 1792 SetConsoleTextAttribute(con_out, curr_attr); 1793 1794 /* Move cursor n lines up from where it was. */ 1795 csbi.dwCursorPosition.Y -= n; 1796 SetConsoleCursorPosition(con_out, csbi.dwCursorPosition); 1797 } 1798 #endif 1799 1800 /* 1801 * Move cursor to lower left corner of screen. 1802 */ 1803 public void 1804 lower_left() 1805 { 1806 #if !MSDOS_COMPILER 1807 tputs(sc_lower_left, 1, putchr); 1808 #else 1809 flush(); 1810 _settextposition(sc_height, 1); 1811 #endif 1812 } 1813 1814 /* 1815 * Check if the console size has changed and reset internals 1816 * (in lieu of SIGWINCH for WIN32). 1817 */ 1818 public void 1819 check_winch() 1820 { 1821 #if MSDOS_COMPILER==WIN32C 1822 CONSOLE_SCREEN_BUFFER_INFO scr; 1823 COORD size; 1824 1825 if (con_out == INVALID_HANDLE_VALUE) 1826 return; 1827 1828 flush(); 1829 GetConsoleScreenBufferInfo(con_out, &scr); 1830 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1; 1831 size.X = scr.srWindow.Right - scr.srWindow.Left + 1; 1832 if (size.Y != sc_height || size.X != sc_width) 1833 { 1834 sc_height = size.Y; 1835 sc_width = size.X; 1836 if (!no_init && con_out_ours == con_out) 1837 SetConsoleScreenBufferSize(con_out, size); 1838 pos_init(); 1839 wscroll = (sc_height + 1) / 2; 1840 screen_trashed = 1; 1841 } 1842 #endif 1843 } 1844 1845 /* 1846 * Goto a specific line on the screen. 1847 */ 1848 public void 1849 goto_line(slinenum) 1850 int slinenum; 1851 { 1852 #if !MSDOS_COMPILER 1853 tputs(tgoto(sc_move, 0, slinenum), 1, putchr); 1854 #else 1855 flush(); 1856 _settextposition(slinenum+1, 1); 1857 #endif 1858 } 1859 1860 #if MSDOS_COMPILER==MSOFTC || MSDOS_COMPILER==BORLANDC 1861 /* 1862 * Create an alternate screen which is all white. 1863 * This screen is used to create a "flash" effect, by displaying it 1864 * briefly and then switching back to the normal screen. 1865 * {{ Yuck! There must be a better way to get a visual bell. }} 1866 */ 1867 static void 1868 create_flash() 1869 { 1870 #if MSDOS_COMPILER==MSOFTC 1871 struct videoconfig w; 1872 char *blanks; 1873 int row, col; 1874 1875 _getvideoconfig(&w); 1876 videopages = w.numvideopages; 1877 if (videopages < 2) 1878 { 1879 at_enter(AT_STANDOUT); 1880 at_exit(); 1881 } else 1882 { 1883 _setactivepage(1); 1884 at_enter(AT_STANDOUT); 1885 blanks = (char *) ecalloc(w.numtextcols, sizeof(char)); 1886 for (col = 0; col < w.numtextcols; col++) 1887 blanks[col] = ' '; 1888 for (row = w.numtextrows; row > 0; row--) 1889 _outmem(blanks, w.numtextcols); 1890 _setactivepage(0); 1891 _setvisualpage(0); 1892 free(blanks); 1893 at_exit(); 1894 } 1895 #else 1896 #if MSDOS_COMPILER==BORLANDC 1897 register int n; 1898 1899 whitescreen = (unsigned short *) 1900 malloc(sc_width * sc_height * sizeof(short)); 1901 if (whitescreen == NULL) 1902 return; 1903 for (n = 0; n < sc_width * sc_height; n++) 1904 whitescreen[n] = 0x7020; 1905 #else 1906 #if MSDOS_COMPILER==WIN32C 1907 register int n; 1908 1909 whitescreen = (WORD *) 1910 malloc(sc_height * sc_width * sizeof(WORD)); 1911 if (whitescreen == NULL) 1912 return; 1913 /* Invert the standard colors. */ 1914 for (n = 0; n < sc_width * sc_height; n++) 1915 whitescreen[n] = (WORD)((nm_fg_color << 4) | nm_bg_color); 1916 #endif 1917 #endif 1918 #endif 1919 flash_created = 1; 1920 } 1921 #endif /* MSDOS_COMPILER */ 1922 1923 /* 1924 * Output the "visual bell", if there is one. 1925 */ 1926 public void 1927 vbell() 1928 { 1929 #if !MSDOS_COMPILER 1930 if (*sc_visual_bell == '\0') 1931 return; 1932 tputs(sc_visual_bell, sc_height, putchr); 1933 #else 1934 #if MSDOS_COMPILER==DJGPPC 1935 ScreenVisualBell(); 1936 #else 1937 #if MSDOS_COMPILER==MSOFTC 1938 /* 1939 * Create a flash screen on the second video page. 1940 * Switch to that page, then switch back. 1941 */ 1942 if (!flash_created) 1943 create_flash(); 1944 if (videopages < 2) 1945 return; 1946 _setvisualpage(1); 1947 delay(100); 1948 _setvisualpage(0); 1949 #else 1950 #if MSDOS_COMPILER==BORLANDC 1951 unsigned short *currscreen; 1952 1953 /* 1954 * Get a copy of the current screen. 1955 * Display the flash screen. 1956 * Then restore the old screen. 1957 */ 1958 if (!flash_created) 1959 create_flash(); 1960 if (whitescreen == NULL) 1961 return; 1962 currscreen = (unsigned short *) 1963 malloc(sc_width * sc_height * sizeof(short)); 1964 if (currscreen == NULL) return; 1965 gettext(1, 1, sc_width, sc_height, currscreen); 1966 puttext(1, 1, sc_width, sc_height, whitescreen); 1967 delay(100); 1968 puttext(1, 1, sc_width, sc_height, currscreen); 1969 free(currscreen); 1970 #else 1971 #if MSDOS_COMPILER==WIN32C 1972 /* paint screen with an inverse color */ 1973 clear(); 1974 1975 /* leave it displayed for 100 msec. */ 1976 Sleep(100); 1977 1978 /* restore with a redraw */ 1979 repaint(); 1980 #endif 1981 #endif 1982 #endif 1983 #endif 1984 #endif 1985 } 1986 1987 /* 1988 * Make a noise. 1989 */ 1990 static void 1991 beep() 1992 { 1993 #if !MSDOS_COMPILER 1994 putchr(CONTROL('G')); 1995 #else 1996 #if MSDOS_COMPILER==WIN32C 1997 MessageBeep(0); 1998 #else 1999 write(1, "\7", 1); 2000 #endif 2001 #endif 2002 } 2003 2004 /* 2005 * Ring the terminal bell. 2006 */ 2007 public void 2008 bell() 2009 { 2010 if (quiet == VERY_QUIET) 2011 vbell(); 2012 else 2013 beep(); 2014 } 2015 2016 /* 2017 * Clear the screen. 2018 */ 2019 public void 2020 clear() 2021 { 2022 #if !MSDOS_COMPILER 2023 tputs(sc_clear, sc_height, putchr); 2024 #else 2025 flush(); 2026 #if MSDOS_COMPILER==WIN32C 2027 win32_clear(); 2028 #else 2029 _clearscreen(_GCLEARSCREEN); 2030 #endif 2031 #endif 2032 } 2033 2034 /* 2035 * Clear from the cursor to the end of the cursor's line. 2036 * {{ This must not move the cursor. }} 2037 */ 2038 public void 2039 clear_eol() 2040 { 2041 #if !MSDOS_COMPILER 2042 tputs(sc_eol_clear, 1, putchr); 2043 #else 2044 #if MSDOS_COMPILER==MSOFTC 2045 short top, left; 2046 short bot, right; 2047 struct rccoord tpos; 2048 2049 flush(); 2050 /* 2051 * Save current state. 2052 */ 2053 tpos = _gettextposition(); 2054 _gettextwindow(&top, &left, &bot, &right); 2055 /* 2056 * Set a temporary window to the current line, 2057 * from the cursor's position to the right edge of the screen. 2058 * Then clear that window. 2059 */ 2060 _settextwindow(tpos.row, tpos.col, tpos.row, sc_width); 2061 _clearscreen(_GWINDOW); 2062 /* 2063 * Restore state. 2064 */ 2065 _settextwindow(top, left, bot, right); 2066 _settextposition(tpos.row, tpos.col); 2067 #else 2068 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 2069 flush(); 2070 clreol(); 2071 #else 2072 #if MSDOS_COMPILER==WIN32C 2073 DWORD nchars; 2074 COORD cpos; 2075 CONSOLE_SCREEN_BUFFER_INFO scr; 2076 2077 flush(); 2078 memset(&scr, 0, sizeof(scr)); 2079 GetConsoleScreenBufferInfo(con_out, &scr); 2080 cpos.X = scr.dwCursorPosition.X; 2081 cpos.Y = scr.dwCursorPosition.Y; 2082 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 2083 FillConsoleOutputAttribute(con_out, curr_attr, 2084 scr.dwSize.X - cpos.X, cpos, &nchars); 2085 FillConsoleOutputCharacter(con_out, ' ', 2086 scr.dwSize.X - cpos.X, cpos, &nchars); 2087 #endif 2088 #endif 2089 #endif 2090 #endif 2091 } 2092 2093 /* 2094 * Clear the current line. 2095 * Clear the screen if there's off-screen memory below the display. 2096 */ 2097 static void 2098 clear_eol_bot() 2099 { 2100 #if MSDOS_COMPILER 2101 clear_eol(); 2102 #else 2103 if (below_mem) 2104 tputs(sc_eos_clear, 1, putchr); 2105 else 2106 tputs(sc_eol_clear, 1, putchr); 2107 #endif 2108 } 2109 2110 /* 2111 * Clear the bottom line of the display. 2112 * Leave the cursor at the beginning of the bottom line. 2113 */ 2114 public void 2115 clear_bot() 2116 { 2117 /* 2118 * If we're in a non-normal attribute mode, temporarily exit 2119 * the mode while we do the clear. Some terminals fill the 2120 * cleared area with the current attribute. 2121 */ 2122 lower_left(); 2123 if (attrmode == AT_NORMAL) 2124 clear_eol_bot(); 2125 else 2126 { 2127 int saved_attrmode = attrmode; 2128 2129 at_exit(); 2130 clear_eol_bot(); 2131 at_enter(saved_attrmode); 2132 } 2133 } 2134 2135 public void 2136 at_enter(attr) 2137 int attr; 2138 { 2139 attr = apply_at_specials(attr); 2140 2141 #if !MSDOS_COMPILER 2142 /* The one with the most priority is last. */ 2143 if (attr & AT_UNDERLINE) 2144 tputs(sc_u_in, 1, putchr); 2145 if (attr & AT_BOLD) 2146 tputs(sc_b_in, 1, putchr); 2147 if (attr & AT_BLINK) 2148 tputs(sc_bl_in, 1, putchr); 2149 if (attr & AT_STANDOUT) 2150 tputs(sc_s_in, 1, putchr); 2151 #else 2152 flush(); 2153 /* The one with the most priority is first. */ 2154 if (attr & AT_STANDOUT) 2155 { 2156 SETCOLORS(so_fg_color, so_bg_color); 2157 } else if (attr & AT_BLINK) 2158 { 2159 SETCOLORS(bl_fg_color, bl_bg_color); 2160 } 2161 else if (attr & AT_BOLD) 2162 { 2163 SETCOLORS(bo_fg_color, bo_bg_color); 2164 } 2165 else if (attr & AT_UNDERLINE) 2166 { 2167 SETCOLORS(ul_fg_color, ul_bg_color); 2168 } 2169 #endif 2170 2171 attrmode = attr; 2172 } 2173 2174 public void 2175 at_exit() 2176 { 2177 #if !MSDOS_COMPILER 2178 /* Undo things in the reverse order we did them. */ 2179 if (attrmode & AT_STANDOUT) 2180 tputs(sc_s_out, 1, putchr); 2181 if (attrmode & AT_BLINK) 2182 tputs(sc_bl_out, 1, putchr); 2183 if (attrmode & AT_BOLD) 2184 tputs(sc_b_out, 1, putchr); 2185 if (attrmode & AT_UNDERLINE) 2186 tputs(sc_u_out, 1, putchr); 2187 #else 2188 flush(); 2189 SETCOLORS(nm_fg_color, nm_bg_color); 2190 #endif 2191 2192 attrmode = AT_NORMAL; 2193 } 2194 2195 public void 2196 at_switch(attr) 2197 int attr; 2198 { 2199 if (apply_at_specials(attr) != attrmode) 2200 { 2201 at_exit(); 2202 at_enter(attr); 2203 } 2204 } 2205 2206 public int 2207 is_at_equiv(attr1, attr2) 2208 int attr1; 2209 int attr2; 2210 { 2211 attr1 = apply_at_specials(attr1); 2212 attr2 = apply_at_specials(attr2); 2213 2214 return (attr1 == attr2); 2215 } 2216 2217 public int 2218 apply_at_specials(attr) 2219 int attr; 2220 { 2221 if (attr & AT_BINARY) 2222 attr |= binattr; 2223 if (attr & AT_HILITE) 2224 attr |= AT_STANDOUT; 2225 attr &= ~(AT_BINARY|AT_HILITE); 2226 2227 return attr; 2228 } 2229 2230 #if 0 /* No longer used */ 2231 /* 2232 * Erase the character to the left of the cursor 2233 * and move the cursor left. 2234 */ 2235 public void 2236 backspace() 2237 { 2238 #if !MSDOS_COMPILER 2239 /* 2240 * Erase the previous character by overstriking with a space. 2241 */ 2242 tputs(sc_backspace, 1, putchr); 2243 putchr(' '); 2244 tputs(sc_backspace, 1, putchr); 2245 #else 2246 #if MSDOS_COMPILER==MSOFTC 2247 struct rccoord tpos; 2248 2249 flush(); 2250 tpos = _gettextposition(); 2251 if (tpos.col <= 1) 2252 return; 2253 _settextposition(tpos.row, tpos.col-1); 2254 _outtext(" "); 2255 _settextposition(tpos.row, tpos.col-1); 2256 #else 2257 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 2258 cputs("\b"); 2259 #else 2260 #if MSDOS_COMPILER==WIN32C 2261 COORD cpos; 2262 DWORD cChars; 2263 CONSOLE_SCREEN_BUFFER_INFO scr; 2264 2265 flush(); 2266 GetConsoleScreenBufferInfo(con_out, &scr); 2267 cpos = scr.dwCursorPosition; 2268 if (cpos.X <= 0) 2269 return; 2270 cpos.X--; 2271 SetConsoleCursorPosition(con_out, cpos); 2272 FillConsoleOutputCharacter(con_out, (TCHAR)' ', 1, cpos, &cChars); 2273 SetConsoleCursorPosition(con_out, cpos); 2274 #endif 2275 #endif 2276 #endif 2277 #endif 2278 } 2279 #endif /* 0 */ 2280 2281 /* 2282 * Output a plain backspace, without erasing the previous char. 2283 */ 2284 public void 2285 putbs() 2286 { 2287 #if !MSDOS_COMPILER 2288 tputs(sc_backspace, 1, putchr); 2289 #else 2290 int row, col; 2291 2292 flush(); 2293 { 2294 #if MSDOS_COMPILER==MSOFTC 2295 struct rccoord tpos; 2296 tpos = _gettextposition(); 2297 row = tpos.row; 2298 col = tpos.col; 2299 #else 2300 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 2301 row = wherey(); 2302 col = wherex(); 2303 #else 2304 #if MSDOS_COMPILER==WIN32C 2305 CONSOLE_SCREEN_BUFFER_INFO scr; 2306 GetConsoleScreenBufferInfo(con_out, &scr); 2307 row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1; 2308 col = scr.dwCursorPosition.X - scr.srWindow.Left + 1; 2309 #endif 2310 #endif 2311 #endif 2312 } 2313 if (col <= 1) 2314 return; 2315 _settextposition(row, col-1); 2316 #endif /* MSDOS_COMPILER */ 2317 } 2318 2319 #if MSDOS_COMPILER==WIN32C 2320 /* 2321 * Determine whether an input character is waiting to be read. 2322 */ 2323 static int 2324 win32_kbhit(tty) 2325 HANDLE tty; 2326 { 2327 INPUT_RECORD ip; 2328 DWORD read; 2329 2330 if (keyCount > 0) 2331 return (TRUE); 2332 2333 currentKey.ascii = 0; 2334 currentKey.scan = 0; 2335 2336 /* 2337 * Wait for a real key-down event, but 2338 * ignore SHIFT and CONTROL key events. 2339 */ 2340 do 2341 { 2342 PeekConsoleInput(tty, &ip, 1, &read); 2343 if (read == 0) 2344 return (FALSE); 2345 ReadConsoleInput(tty, &ip, 1, &read); 2346 } while (ip.EventType != KEY_EVENT || 2347 ip.Event.KeyEvent.bKeyDown != TRUE || 2348 ip.Event.KeyEvent.wVirtualScanCode == 0 || 2349 ip.Event.KeyEvent.wVirtualKeyCode == VK_SHIFT || 2350 ip.Event.KeyEvent.wVirtualKeyCode == VK_CONTROL || 2351 ip.Event.KeyEvent.wVirtualKeyCode == VK_MENU); 2352 2353 currentKey.ascii = ip.Event.KeyEvent.uChar.AsciiChar; 2354 currentKey.scan = ip.Event.KeyEvent.wVirtualScanCode; 2355 keyCount = ip.Event.KeyEvent.wRepeatCount; 2356 2357 if (ip.Event.KeyEvent.dwControlKeyState & 2358 (LEFT_ALT_PRESSED | RIGHT_ALT_PRESSED)) 2359 { 2360 switch (currentKey.scan) 2361 { 2362 case PCK_ALT_E: /* letter 'E' */ 2363 currentKey.ascii = 0; 2364 break; 2365 } 2366 } else if (ip.Event.KeyEvent.dwControlKeyState & 2367 (LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED)) 2368 { 2369 switch (currentKey.scan) 2370 { 2371 case PCK_RIGHT: /* right arrow */ 2372 currentKey.scan = PCK_CTL_RIGHT; 2373 break; 2374 case PCK_LEFT: /* left arrow */ 2375 currentKey.scan = PCK_CTL_LEFT; 2376 break; 2377 case PCK_DELETE: /* delete */ 2378 currentKey.scan = PCK_CTL_DELETE; 2379 break; 2380 } 2381 } 2382 return (TRUE); 2383 } 2384 2385 /* 2386 * Read a character from the keyboard. 2387 */ 2388 public char 2389 WIN32getch(tty) 2390 int tty; 2391 { 2392 int ascii; 2393 2394 if (pending_scancode) 2395 { 2396 pending_scancode = 0; 2397 return ((char)(currentKey.scan & 0x00FF)); 2398 } 2399 2400 while (win32_kbhit((HANDLE)tty) == FALSE) 2401 { 2402 Sleep(20); 2403 if (ABORT_SIGS()) 2404 return ('\003'); 2405 continue; 2406 } 2407 keyCount --; 2408 ascii = currentKey.ascii; 2409 /* 2410 * On PC's, the extended keys return a 2 byte sequence beginning 2411 * with '00', so if the ascii code is 00, the next byte will be 2412 * the lsb of the scan code. 2413 */ 2414 pending_scancode = (ascii == 0x00); 2415 return ((char)ascii); 2416 } 2417 #endif 2418