1 /* 2 * Copyright (C) 1984-2019 Mark Nudelman 3 * 4 * You may distribute under the terms of either the GNU General Public 5 * License or the Less License, as specified in the README file. 6 * 7 * For more information, see the README file. 8 */ 9 10 11 /* 12 * Routines which deal with the characteristics of the terminal. 13 * Uses termcap to be as terminal-independent as possible. 14 */ 15 16 #include "less.h" 17 #include "cmd.h" 18 19 #if MSDOS_COMPILER 20 #include "pckeys.h" 21 #if MSDOS_COMPILER==MSOFTC 22 #include <graph.h> 23 #else 24 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 25 #include <conio.h> 26 #if MSDOS_COMPILER==DJGPPC 27 #include <pc.h> 28 extern int fd0; 29 #endif 30 #else 31 #if MSDOS_COMPILER==WIN32C 32 #include <windows.h> 33 #endif 34 #endif 35 #endif 36 #include <time.h> 37 38 #else 39 40 #if HAVE_SYS_IOCTL_H 41 #include <sys/ioctl.h> 42 #endif 43 44 #if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS 45 #include <termios.h> 46 #else 47 #if HAVE_TERMIO_H 48 #include <termio.h> 49 #else 50 #if HAVE_SGSTAT_H 51 #include <sgstat.h> 52 #else 53 #include <sgtty.h> 54 #endif 55 #endif 56 #endif 57 58 #if HAVE_TERMCAP_H 59 #include <termcap.h> 60 #endif 61 #ifdef _OSK 62 #include <signal.h> 63 #endif 64 #if OS2 65 #include <sys/signal.h> 66 #include "pckeys.h" 67 #endif 68 #if HAVE_SYS_STREAM_H 69 #include <sys/stream.h> 70 #endif 71 #if HAVE_SYS_PTEM_H 72 #include <sys/ptem.h> 73 #endif 74 75 #endif /* MSDOS_COMPILER */ 76 77 /* 78 * Check for broken termios package that forces you to manually 79 * set the line discipline. 80 */ 81 #ifdef __ultrix__ 82 #define MUST_SET_LINE_DISCIPLINE 1 83 #else 84 #define MUST_SET_LINE_DISCIPLINE 0 85 #endif 86 87 #if OS2 88 #define DEFAULT_TERM "ansi" 89 static char *windowid; 90 #else 91 #define DEFAULT_TERM "unknown" 92 #endif 93 94 #if MSDOS_COMPILER==MSOFTC 95 static int videopages; 96 static long msec_loops; 97 static int flash_created = 0; 98 #define SETCOLORS(fg,bg) { _settextcolor(fg); _setbkcolor(bg); } 99 #endif 100 101 #if MSDOS_COMPILER==BORLANDC 102 static unsigned short *whitescreen; 103 static int flash_created = 0; 104 #endif 105 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 106 #define _settextposition(y,x) gotoxy(x,y) 107 #define _clearscreen(m) clrscr() 108 #define _outtext(s) cputs(s) 109 #define SETCOLORS(fg,bg) { textcolor(fg); textbackground(bg); } 110 extern int sc_height; 111 #endif 112 113 #if MSDOS_COMPILER==WIN32C 114 struct keyRecord 115 { 116 int ascii; 117 int scan; 118 } currentKey; 119 120 static int keyCount = 0; 121 static WORD curr_attr; 122 static int pending_scancode = 0; 123 static char x11mousebuf[] = "[M???"; /* Mouse report, after ESC */ 124 static int x11mousePos, x11mouseCount; 125 126 static HANDLE con_out_save = INVALID_HANDLE_VALUE; /* previous console */ 127 static HANDLE con_out_ours = INVALID_HANDLE_VALUE; /* our own */ 128 HANDLE con_out = INVALID_HANDLE_VALUE; /* current console */ 129 130 extern int utf_mode; 131 extern int quitting; 132 static void win32_init_term(); 133 static void win32_deinit_term(); 134 135 #ifndef ENABLE_VIRTUAL_TERMINAL_PROCESSING 136 #define ENABLE_VIRTUAL_TERMINAL_PROCESSING 4 137 #endif 138 139 #define FG_COLORS (FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_INTENSITY) 140 #define BG_COLORS (BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE | BACKGROUND_INTENSITY) 141 #define MAKEATTR(fg,bg) ((WORD)((fg)|((bg)<<4))) 142 #define SETCOLORS(fg,bg) { curr_attr = MAKEATTR(fg,bg); \ 143 if (SetConsoleTextAttribute(con_out, curr_attr) == 0) \ 144 error("SETCOLORS failed", NULL_PARG); } 145 #endif 146 147 #if MSDOS_COMPILER 148 public int nm_fg_color; /* Color of normal text */ 149 public int nm_bg_color; 150 public int bo_fg_color; /* Color of bold text */ 151 public int bo_bg_color; 152 public int ul_fg_color; /* Color of underlined text */ 153 public int ul_bg_color; 154 public int so_fg_color; /* Color of standout text */ 155 public int so_bg_color; 156 public int bl_fg_color; /* Color of blinking text */ 157 public int bl_bg_color; 158 static int sy_fg_color; /* Color of system text (before less) */ 159 static int sy_bg_color; 160 public int sgr_mode; /* Honor ANSI sequences rather than using above */ 161 #if MSDOS_COMPILER==WIN32C 162 public int have_ul; /* Is underline available? */ 163 #endif 164 #else 165 166 /* 167 * Strings passed to tputs() to do various terminal functions. 168 */ 169 static char 170 *sc_pad, /* Pad string */ 171 *sc_home, /* Cursor home */ 172 *sc_addline, /* Add line, scroll down following lines */ 173 *sc_lower_left, /* Cursor to last line, first column */ 174 *sc_return, /* Cursor to beginning of current line */ 175 *sc_move, /* General cursor positioning */ 176 *sc_clear, /* Clear screen */ 177 *sc_eol_clear, /* Clear to end of line */ 178 *sc_eos_clear, /* Clear to end of screen */ 179 *sc_s_in, /* Enter standout (highlighted) mode */ 180 *sc_s_out, /* Exit standout mode */ 181 *sc_u_in, /* Enter underline mode */ 182 *sc_u_out, /* Exit underline mode */ 183 *sc_b_in, /* Enter bold mode */ 184 *sc_b_out, /* Exit bold mode */ 185 *sc_bl_in, /* Enter blink mode */ 186 *sc_bl_out, /* Exit blink mode */ 187 *sc_visual_bell, /* Visual bell (flash screen) sequence */ 188 *sc_backspace, /* Backspace cursor */ 189 *sc_s_keypad, /* Start keypad mode */ 190 *sc_e_keypad, /* End keypad mode */ 191 *sc_s_mousecap, /* Start mouse capture mode */ 192 *sc_e_mousecap, /* End mouse capture mode */ 193 *sc_init, /* Startup terminal initialization */ 194 *sc_deinit; /* Exit terminal de-initialization */ 195 #endif 196 197 static int init_done = 0; 198 199 public int auto_wrap; /* Terminal does \r\n when write past margin */ 200 public int ignaw; /* Terminal ignores \n immediately after wrap */ 201 public int erase_char; /* The user's erase char */ 202 public int erase2_char; /* The user's other erase char */ 203 public int kill_char; /* The user's line-kill char */ 204 public int werase_char; /* The user's word-erase char */ 205 public int sc_width, sc_height; /* Height & width of screen */ 206 public int bo_s_width, bo_e_width; /* Printing width of boldface seq */ 207 public int ul_s_width, ul_e_width; /* Printing width of underline seq */ 208 public int so_s_width, so_e_width; /* Printing width of standout seq */ 209 public int bl_s_width, bl_e_width; /* Printing width of blink seq */ 210 public int above_mem, below_mem; /* Memory retained above/below screen */ 211 public int can_goto_line; /* Can move cursor to any line */ 212 public int clear_bg; /* Clear fills with background color */ 213 public int missing_cap = 0; /* Some capability is missing */ 214 public char *kent = NULL; /* Keypad ENTER sequence */ 215 216 static int attrmode = AT_NORMAL; 217 static int termcap_debug = -1; 218 extern int binattr; 219 extern int one_screen; 220 221 #if !MSDOS_COMPILER 222 static char *cheaper(); 223 static void tmodes(); 224 #endif 225 226 /* 227 * These two variables are sometimes defined in, 228 * and needed by, the termcap library. 229 */ 230 #if MUST_DEFINE_OSPEED 231 extern short ospeed; /* Terminal output baud rate */ 232 extern char PC; /* Pad character */ 233 #endif 234 #ifdef _OSK 235 short ospeed; 236 char PC_, *UP, *BC; 237 #endif 238 239 extern int quiet; /* If VERY_QUIET, use visual bell for bell */ 240 extern int no_back_scroll; 241 extern int swindow; 242 extern int no_init; 243 extern int no_keypad; 244 extern int sigs; 245 extern int wscroll; 246 extern int screen_trashed; 247 extern int top_scroll; 248 extern int quit_if_one_screen; 249 extern int oldbot; 250 extern int mousecap; 251 #if HILITE_SEARCH 252 extern int hilite_search; 253 #endif 254 #if MSDOS_COMPILER==WIN32C 255 extern HANDLE tty; 256 #else 257 extern int tty; 258 #endif 259 260 extern char *tgetstr(); 261 extern char *tgoto(); 262 263 264 /* 265 * Change terminal to "raw mode", or restore to "normal" mode. 266 * "Raw mode" means 267 * 1. An outstanding read will complete on receipt of a single keystroke. 268 * 2. Input is not echoed. 269 * 3. On output, \n is mapped to \r\n. 270 * 4. \t is NOT expanded into spaces. 271 * 5. Signal-causing characters such as ctrl-C (interrupt), 272 * etc. are NOT disabled. 273 * It doesn't matter whether an input \n is mapped to \r, or vice versa. 274 */ 275 public void 276 raw_mode(on) 277 int on; 278 { 279 static int curr_on = 0; 280 281 if (on == curr_on) 282 return; 283 erase2_char = '\b'; /* in case OS doesn't know about erase2 */ 284 #if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS 285 { 286 struct termios s; 287 static struct termios save_term; 288 static int saved_term = 0; 289 290 if (on) 291 { 292 /* 293 * Get terminal modes. 294 */ 295 tcgetattr(tty, &s); 296 297 /* 298 * Save modes and set certain variables dependent on modes. 299 */ 300 if (!saved_term) 301 { 302 save_term = s; 303 saved_term = 1; 304 } 305 #if HAVE_OSPEED 306 switch (cfgetospeed(&s)) 307 { 308 #ifdef B0 309 case B0: ospeed = 0; break; 310 #endif 311 #ifdef B50 312 case B50: ospeed = 1; break; 313 #endif 314 #ifdef B75 315 case B75: ospeed = 2; break; 316 #endif 317 #ifdef B110 318 case B110: ospeed = 3; break; 319 #endif 320 #ifdef B134 321 case B134: ospeed = 4; break; 322 #endif 323 #ifdef B150 324 case B150: ospeed = 5; break; 325 #endif 326 #ifdef B200 327 case B200: ospeed = 6; break; 328 #endif 329 #ifdef B300 330 case B300: ospeed = 7; break; 331 #endif 332 #ifdef B600 333 case B600: ospeed = 8; break; 334 #endif 335 #ifdef B1200 336 case B1200: ospeed = 9; break; 337 #endif 338 #ifdef B1800 339 case B1800: ospeed = 10; break; 340 #endif 341 #ifdef B2400 342 case B2400: ospeed = 11; break; 343 #endif 344 #ifdef B4800 345 case B4800: ospeed = 12; break; 346 #endif 347 #ifdef B9600 348 case B9600: ospeed = 13; break; 349 #endif 350 #ifdef EXTA 351 case EXTA: ospeed = 14; break; 352 #endif 353 #ifdef EXTB 354 case EXTB: ospeed = 15; break; 355 #endif 356 #ifdef B57600 357 case B57600: ospeed = 16; break; 358 #endif 359 #ifdef B115200 360 case B115200: ospeed = 17; break; 361 #endif 362 default: ; 363 } 364 #endif 365 erase_char = s.c_cc[VERASE]; 366 #ifdef VERASE2 367 erase2_char = s.c_cc[VERASE2]; 368 #endif 369 kill_char = s.c_cc[VKILL]; 370 #ifdef VWERASE 371 werase_char = s.c_cc[VWERASE]; 372 #else 373 werase_char = CONTROL('W'); 374 #endif 375 376 /* 377 * Set the modes to the way we want them. 378 */ 379 s.c_lflag &= ~(0 380 #ifdef ICANON 381 | ICANON 382 #endif 383 #ifdef ECHO 384 | ECHO 385 #endif 386 #ifdef ECHOE 387 | ECHOE 388 #endif 389 #ifdef ECHOK 390 | ECHOK 391 #endif 392 #if ECHONL 393 | ECHONL 394 #endif 395 ); 396 397 s.c_oflag |= (0 398 #ifdef OXTABS 399 | OXTABS 400 #else 401 #ifdef TAB3 402 | TAB3 403 #else 404 #ifdef XTABS 405 | XTABS 406 #endif 407 #endif 408 #endif 409 #ifdef OPOST 410 | OPOST 411 #endif 412 #ifdef ONLCR 413 | ONLCR 414 #endif 415 ); 416 417 s.c_oflag &= ~(0 418 #ifdef ONOEOT 419 | ONOEOT 420 #endif 421 #ifdef OCRNL 422 | OCRNL 423 #endif 424 #ifdef ONOCR 425 | ONOCR 426 #endif 427 #ifdef ONLRET 428 | ONLRET 429 #endif 430 ); 431 s.c_cc[VMIN] = 1; 432 s.c_cc[VTIME] = 0; 433 #ifdef VLNEXT 434 s.c_cc[VLNEXT] = 0; 435 #endif 436 #ifdef VDSUSP 437 s.c_cc[VDSUSP] = 0; 438 #endif 439 #if MUST_SET_LINE_DISCIPLINE 440 /* 441 * System's termios is broken; need to explicitly 442 * request TERMIODISC line discipline. 443 */ 444 s.c_line = TERMIODISC; 445 #endif 446 } else 447 { 448 /* 449 * Restore saved modes. 450 */ 451 s = save_term; 452 } 453 #if HAVE_FSYNC 454 fsync(tty); 455 #endif 456 tcsetattr(tty, TCSADRAIN, &s); 457 #if MUST_SET_LINE_DISCIPLINE 458 if (!on) 459 { 460 /* 461 * Broken termios *ignores* any line discipline 462 * except TERMIODISC. A different old line discipline 463 * is therefore not restored, yet. Restore the old 464 * line discipline by hand. 465 */ 466 ioctl(tty, TIOCSETD, &save_term.c_line); 467 } 468 #endif 469 } 470 #else 471 #ifdef TCGETA 472 { 473 struct termio s; 474 static struct termio save_term; 475 static int saved_term = 0; 476 477 if (on) 478 { 479 /* 480 * Get terminal modes. 481 */ 482 ioctl(tty, TCGETA, &s); 483 484 /* 485 * Save modes and set certain variables dependent on modes. 486 */ 487 if (!saved_term) 488 { 489 save_term = s; 490 saved_term = 1; 491 } 492 #if HAVE_OSPEED 493 ospeed = s.c_cflag & CBAUD; 494 #endif 495 erase_char = s.c_cc[VERASE]; 496 kill_char = s.c_cc[VKILL]; 497 #ifdef VWERASE 498 werase_char = s.c_cc[VWERASE]; 499 #else 500 werase_char = CONTROL('W'); 501 #endif 502 503 /* 504 * Set the modes to the way we want them. 505 */ 506 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); 507 s.c_oflag |= (OPOST|ONLCR|TAB3); 508 s.c_oflag &= ~(OCRNL|ONOCR|ONLRET); 509 s.c_cc[VMIN] = 1; 510 s.c_cc[VTIME] = 0; 511 } else 512 { 513 /* 514 * Restore saved modes. 515 */ 516 s = save_term; 517 } 518 ioctl(tty, TCSETAW, &s); 519 } 520 #else 521 #ifdef TIOCGETP 522 { 523 struct sgttyb s; 524 static struct sgttyb save_term; 525 static int saved_term = 0; 526 527 if (on) 528 { 529 /* 530 * Get terminal modes. 531 */ 532 ioctl(tty, TIOCGETP, &s); 533 534 /* 535 * Save modes and set certain variables dependent on modes. 536 */ 537 if (!saved_term) 538 { 539 save_term = s; 540 saved_term = 1; 541 } 542 #if HAVE_OSPEED 543 ospeed = s.sg_ospeed; 544 #endif 545 erase_char = s.sg_erase; 546 kill_char = s.sg_kill; 547 werase_char = CONTROL('W'); 548 549 /* 550 * Set the modes to the way we want them. 551 */ 552 s.sg_flags |= CBREAK; 553 s.sg_flags &= ~(ECHO|XTABS); 554 } else 555 { 556 /* 557 * Restore saved modes. 558 */ 559 s = save_term; 560 } 561 ioctl(tty, TIOCSETN, &s); 562 } 563 #else 564 #ifdef _OSK 565 { 566 struct sgbuf s; 567 static struct sgbuf save_term; 568 static int saved_term = 0; 569 570 if (on) 571 { 572 /* 573 * Get terminal modes. 574 */ 575 _gs_opt(tty, &s); 576 577 /* 578 * Save modes and set certain variables dependent on modes. 579 */ 580 if (!saved_term) 581 { 582 save_term = s; 583 saved_term = 1; 584 } 585 erase_char = s.sg_bspch; 586 kill_char = s.sg_dlnch; 587 werase_char = CONTROL('W'); 588 589 /* 590 * Set the modes to the way we want them. 591 */ 592 s.sg_echo = 0; 593 s.sg_eofch = 0; 594 s.sg_pause = 0; 595 s.sg_psch = 0; 596 } else 597 { 598 /* 599 * Restore saved modes. 600 */ 601 s = save_term; 602 } 603 _ss_opt(tty, &s); 604 } 605 #else 606 /* MS-DOS, Windows, or OS2 */ 607 #if OS2 608 /* OS2 */ 609 LSIGNAL(SIGINT, SIG_IGN); 610 #endif 611 erase_char = '\b'; 612 #if MSDOS_COMPILER==DJGPPC 613 kill_char = CONTROL('U'); 614 /* 615 * So that when we shell out or run another program, its 616 * stdin is in cooked mode. We do not switch stdin to binary 617 * mode if fd0 is zero, since that means we were called before 618 * tty was reopened in open_getchr, in which case we would be 619 * changing the original stdin device outside less. 620 */ 621 if (fd0 != 0) 622 setmode(0, on ? O_BINARY : O_TEXT); 623 #else 624 kill_char = ESC; 625 #endif 626 werase_char = CONTROL('W'); 627 #endif 628 #endif 629 #endif 630 #endif 631 curr_on = on; 632 } 633 634 #if !MSDOS_COMPILER 635 /* 636 * Some glue to prevent calling termcap functions if tgetent() failed. 637 */ 638 static int hardcopy; 639 640 static char * 641 ltget_env(capname) 642 char *capname; 643 { 644 char name[64]; 645 char *s; 646 647 if (termcap_debug) 648 { 649 struct env { struct env *next; char *name; char *value; }; 650 static struct env *envs = NULL; 651 struct env *p; 652 for (p = envs; p != NULL; p = p->next) 653 if (strcmp(p->name, capname) == 0) 654 return p->value; 655 p = (struct env *) ecalloc(1, sizeof(struct env)); 656 p->name = save(capname); 657 p->value = (char *) ecalloc(strlen(capname)+3, sizeof(char)); 658 sprintf(p->value, "<%s>", capname); 659 p->next = envs; 660 envs = p; 661 return p->value; 662 } 663 SNPRINTF1(name, sizeof(name), "LESS_TERMCAP_%s", capname); 664 return (lgetenv(name)); 665 } 666 667 static int 668 ltgetflag(capname) 669 char *capname; 670 { 671 char *s; 672 673 if ((s = ltget_env(capname)) != NULL) 674 return (*s != '\0' && *s != '0'); 675 if (hardcopy) 676 return (0); 677 return (tgetflag(capname)); 678 } 679 680 static int 681 ltgetnum(capname) 682 char *capname; 683 { 684 char *s; 685 686 if ((s = ltget_env(capname)) != NULL) 687 return (atoi(s)); 688 if (hardcopy) 689 return (-1); 690 return (tgetnum(capname)); 691 } 692 693 static char * 694 ltgetstr(capname, pp) 695 char *capname; 696 char **pp; 697 { 698 char *s; 699 700 if ((s = ltget_env(capname)) != NULL) 701 return (s); 702 if (hardcopy) 703 return (NULL); 704 return (tgetstr(capname, pp)); 705 } 706 #endif /* MSDOS_COMPILER */ 707 708 /* 709 * Get size of the output screen. 710 */ 711 public void 712 scrsize(VOID_PARAM) 713 { 714 char *s; 715 int sys_height; 716 int sys_width; 717 #if !MSDOS_COMPILER 718 int n; 719 #endif 720 721 #define DEF_SC_WIDTH 80 722 #if MSDOS_COMPILER 723 #define DEF_SC_HEIGHT 25 724 #else 725 #define DEF_SC_HEIGHT 24 726 #endif 727 728 729 sys_width = sys_height = 0; 730 731 #if MSDOS_COMPILER==MSOFTC 732 { 733 struct videoconfig w; 734 _getvideoconfig(&w); 735 sys_height = w.numtextrows; 736 sys_width = w.numtextcols; 737 } 738 #else 739 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 740 { 741 struct text_info w; 742 gettextinfo(&w); 743 sys_height = w.screenheight; 744 sys_width = w.screenwidth; 745 } 746 #else 747 #if MSDOS_COMPILER==WIN32C 748 { 749 CONSOLE_SCREEN_BUFFER_INFO scr; 750 GetConsoleScreenBufferInfo(con_out, &scr); 751 sys_height = scr.srWindow.Bottom - scr.srWindow.Top + 1; 752 sys_width = scr.srWindow.Right - scr.srWindow.Left + 1; 753 } 754 #else 755 #if OS2 756 { 757 int s[2]; 758 _scrsize(s); 759 sys_width = s[0]; 760 sys_height = s[1]; 761 /* 762 * When using terminal emulators for XFree86/OS2, the 763 * _scrsize function does not work well. 764 * Call the scrsize.exe program to get the window size. 765 */ 766 windowid = getenv("WINDOWID"); 767 if (windowid != NULL) 768 { 769 FILE *fd = popen("scrsize", "rt"); 770 if (fd != NULL) 771 { 772 int w, h; 773 fscanf(fd, "%i %i", &w, &h); 774 if (w > 0 && h > 0) 775 { 776 sys_width = w; 777 sys_height = h; 778 } 779 pclose(fd); 780 } 781 } 782 } 783 #else 784 #ifdef TIOCGWINSZ 785 { 786 struct winsize w; 787 if (ioctl(2, TIOCGWINSZ, &w) == 0) 788 { 789 if (w.ws_row > 0) 790 sys_height = w.ws_row; 791 if (w.ws_col > 0) 792 sys_width = w.ws_col; 793 } 794 } 795 #else 796 #ifdef WIOCGETD 797 { 798 struct uwdata w; 799 if (ioctl(2, WIOCGETD, &w) == 0) 800 { 801 if (w.uw_height > 0) 802 sys_height = w.uw_height / w.uw_vs; 803 if (w.uw_width > 0) 804 sys_width = w.uw_width / w.uw_hs; 805 } 806 } 807 #endif 808 #endif 809 #endif 810 #endif 811 #endif 812 #endif 813 814 if (sys_height > 0) 815 sc_height = sys_height; 816 else if ((s = lgetenv("LINES")) != NULL) 817 sc_height = atoi(s); 818 #if !MSDOS_COMPILER 819 else if ((n = ltgetnum("li")) > 0) 820 sc_height = n; 821 #endif 822 if (sc_height <= 0) 823 sc_height = DEF_SC_HEIGHT; 824 825 if (sys_width > 0) 826 sc_width = sys_width; 827 else if ((s = lgetenv("COLUMNS")) != NULL) 828 sc_width = atoi(s); 829 #if !MSDOS_COMPILER 830 else if ((n = ltgetnum("co")) > 0) 831 sc_width = n; 832 #endif 833 if (sc_width <= 0) 834 sc_width = DEF_SC_WIDTH; 835 } 836 837 #if MSDOS_COMPILER==MSOFTC 838 /* 839 * Figure out how many empty loops it takes to delay a millisecond. 840 */ 841 static void 842 get_clock(VOID_PARAM) 843 { 844 clock_t start; 845 846 /* 847 * Get synchronized at the start of a tick. 848 */ 849 start = clock(); 850 while (clock() == start) 851 ; 852 /* 853 * Now count loops till the next tick. 854 */ 855 start = clock(); 856 msec_loops = 0; 857 while (clock() == start) 858 msec_loops++; 859 /* 860 * Convert from (loops per clock) to (loops per millisecond). 861 */ 862 msec_loops *= CLOCKS_PER_SEC; 863 msec_loops /= 1000; 864 } 865 866 /* 867 * Delay for a specified number of milliseconds. 868 */ 869 static void 870 delay(msec) 871 int msec; 872 { 873 long i; 874 875 while (msec-- > 0) 876 { 877 for (i = 0; i < msec_loops; i++) 878 (void) clock(); 879 } 880 } 881 #endif 882 883 /* 884 * Return the characters actually input by a "special" key. 885 */ 886 public char * 887 special_key_str(key) 888 int key; 889 { 890 static char tbuf[40]; 891 char *s; 892 #if MSDOS_COMPILER || OS2 893 static char k_right[] = { '\340', PCK_RIGHT, 0 }; 894 static char k_left[] = { '\340', PCK_LEFT, 0 }; 895 static char k_ctl_right[] = { '\340', PCK_CTL_RIGHT, 0 }; 896 static char k_ctl_left[] = { '\340', PCK_CTL_LEFT, 0 }; 897 static char k_insert[] = { '\340', PCK_INSERT, 0 }; 898 static char k_delete[] = { '\340', PCK_DELETE, 0 }; 899 static char k_ctl_delete[] = { '\340', PCK_CTL_DELETE, 0 }; 900 static char k_ctl_backspace[] = { '\177', 0 }; 901 static char k_home[] = { '\340', PCK_HOME, 0 }; 902 static char k_end[] = { '\340', PCK_END, 0 }; 903 static char k_up[] = { '\340', PCK_UP, 0 }; 904 static char k_down[] = { '\340', PCK_DOWN, 0 }; 905 static char k_backtab[] = { '\340', PCK_SHIFT_TAB, 0 }; 906 static char k_pagedown[] = { '\340', PCK_PAGEDOWN, 0 }; 907 static char k_pageup[] = { '\340', PCK_PAGEUP, 0 }; 908 static char k_f1[] = { '\340', PCK_F1, 0 }; 909 #endif 910 #if !MSDOS_COMPILER 911 char *sp = tbuf; 912 #endif 913 914 switch (key) 915 { 916 #if OS2 917 /* 918 * If windowid is not NULL, assume less is executed in 919 * the XFree86 environment. 920 */ 921 case SK_RIGHT_ARROW: 922 s = windowid ? ltgetstr("kr", &sp) : k_right; 923 break; 924 case SK_LEFT_ARROW: 925 s = windowid ? ltgetstr("kl", &sp) : k_left; 926 break; 927 case SK_UP_ARROW: 928 s = windowid ? ltgetstr("ku", &sp) : k_up; 929 break; 930 case SK_DOWN_ARROW: 931 s = windowid ? ltgetstr("kd", &sp) : k_down; 932 break; 933 case SK_PAGE_UP: 934 s = windowid ? ltgetstr("kP", &sp) : k_pageup; 935 break; 936 case SK_PAGE_DOWN: 937 s = windowid ? ltgetstr("kN", &sp) : k_pagedown; 938 break; 939 case SK_HOME: 940 s = windowid ? ltgetstr("kh", &sp) : k_home; 941 break; 942 case SK_END: 943 s = windowid ? ltgetstr("@7", &sp) : k_end; 944 break; 945 case SK_DELETE: 946 s = windowid ? ltgetstr("kD", &sp) : k_delete; 947 if (s == NULL) 948 { 949 tbuf[0] = '\177'; 950 tbuf[1] = '\0'; 951 s = tbuf; 952 } 953 break; 954 #endif 955 #if MSDOS_COMPILER 956 case SK_RIGHT_ARROW: 957 s = k_right; 958 break; 959 case SK_LEFT_ARROW: 960 s = k_left; 961 break; 962 case SK_UP_ARROW: 963 s = k_up; 964 break; 965 case SK_DOWN_ARROW: 966 s = k_down; 967 break; 968 case SK_PAGE_UP: 969 s = k_pageup; 970 break; 971 case SK_PAGE_DOWN: 972 s = k_pagedown; 973 break; 974 case SK_HOME: 975 s = k_home; 976 break; 977 case SK_END: 978 s = k_end; 979 break; 980 case SK_DELETE: 981 s = k_delete; 982 break; 983 #endif 984 #if MSDOS_COMPILER || OS2 985 case SK_INSERT: 986 s = k_insert; 987 break; 988 case SK_CTL_LEFT_ARROW: 989 s = k_ctl_left; 990 break; 991 case SK_CTL_RIGHT_ARROW: 992 s = k_ctl_right; 993 break; 994 case SK_CTL_BACKSPACE: 995 s = k_ctl_backspace; 996 break; 997 case SK_CTL_DELETE: 998 s = k_ctl_delete; 999 break; 1000 case SK_F1: 1001 s = k_f1; 1002 break; 1003 case SK_BACKTAB: 1004 s = k_backtab; 1005 break; 1006 #else 1007 case SK_RIGHT_ARROW: 1008 s = ltgetstr("kr", &sp); 1009 break; 1010 case SK_LEFT_ARROW: 1011 s = ltgetstr("kl", &sp); 1012 break; 1013 case SK_UP_ARROW: 1014 s = ltgetstr("ku", &sp); 1015 break; 1016 case SK_DOWN_ARROW: 1017 s = ltgetstr("kd", &sp); 1018 break; 1019 case SK_PAGE_UP: 1020 s = ltgetstr("kP", &sp); 1021 break; 1022 case SK_PAGE_DOWN: 1023 s = ltgetstr("kN", &sp); 1024 break; 1025 case SK_HOME: 1026 s = ltgetstr("kh", &sp); 1027 break; 1028 case SK_END: 1029 s = ltgetstr("@7", &sp); 1030 break; 1031 case SK_DELETE: 1032 s = ltgetstr("kD", &sp); 1033 if (s == NULL) 1034 { 1035 tbuf[0] = '\177'; 1036 tbuf[1] = '\0'; 1037 s = tbuf; 1038 } 1039 break; 1040 #endif 1041 case SK_CONTROL_K: 1042 tbuf[0] = CONTROL('K'); 1043 tbuf[1] = '\0'; 1044 s = tbuf; 1045 break; 1046 default: 1047 return (NULL); 1048 } 1049 return (s); 1050 } 1051 1052 /* 1053 * Get terminal capabilities via termcap. 1054 */ 1055 public void 1056 get_term(VOID_PARAM) 1057 { 1058 termcap_debug = !isnullenv(lgetenv("LESS_TERMCAP_DEBUG")); 1059 #if MSDOS_COMPILER 1060 auto_wrap = 1; 1061 ignaw = 0; 1062 can_goto_line = 1; 1063 clear_bg = 1; 1064 /* 1065 * Set up default colors. 1066 * The xx_s_width and xx_e_width vars are already initialized to 0. 1067 */ 1068 #if MSDOS_COMPILER==MSOFTC 1069 sy_bg_color = _getbkcolor(); 1070 sy_fg_color = _gettextcolor(); 1071 get_clock(); 1072 #else 1073 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 1074 { 1075 struct text_info w; 1076 gettextinfo(&w); 1077 sy_bg_color = (w.attribute >> 4) & 0x0F; 1078 sy_fg_color = (w.attribute >> 0) & 0x0F; 1079 } 1080 #else 1081 #if MSDOS_COMPILER==WIN32C 1082 { 1083 DWORD nread; 1084 CONSOLE_SCREEN_BUFFER_INFO scr; 1085 1086 con_out_save = con_out = GetStdHandle(STD_OUTPUT_HANDLE); 1087 /* 1088 * Always open stdin in binary. Note this *must* be done 1089 * before any file operations have been done on fd0. 1090 */ 1091 SET_BINARY(0); 1092 GetConsoleScreenBufferInfo(con_out, &scr); 1093 ReadConsoleOutputAttribute(con_out, &curr_attr, 1094 1, scr.dwCursorPosition, &nread); 1095 sy_bg_color = (curr_attr & BG_COLORS) >> 4; /* normalize */ 1096 sy_fg_color = curr_attr & FG_COLORS; 1097 } 1098 #endif 1099 #endif 1100 #endif 1101 nm_fg_color = sy_fg_color; 1102 nm_bg_color = sy_bg_color; 1103 bo_fg_color = 11; 1104 bo_bg_color = 0; 1105 ul_fg_color = 9; 1106 ul_bg_color = 0; 1107 so_fg_color = 15; 1108 so_bg_color = 9; 1109 bl_fg_color = 15; 1110 bl_bg_color = 0; 1111 sgr_mode = 0; 1112 1113 /* 1114 * Get size of the screen. 1115 */ 1116 scrsize(); 1117 pos_init(); 1118 1119 1120 #else /* !MSDOS_COMPILER */ 1121 { 1122 char *sp; 1123 char *t1, *t2; 1124 char *term; 1125 char termbuf[TERMBUF_SIZE]; 1126 1127 static char sbuf[TERMSBUF_SIZE]; 1128 1129 #if OS2 1130 /* 1131 * Make sure the termcap database is available. 1132 */ 1133 sp = lgetenv("TERMCAP"); 1134 if (isnullenv(sp)) 1135 { 1136 char *termcap; 1137 if ((sp = homefile("termcap.dat")) != NULL) 1138 { 1139 termcap = (char *) ecalloc(strlen(sp)+9, sizeof(char)); 1140 sprintf(termcap, "TERMCAP=%s", sp); 1141 free(sp); 1142 putenv(termcap); 1143 } 1144 } 1145 #endif 1146 /* 1147 * Find out what kind of terminal this is. 1148 */ 1149 if ((term = lgetenv("TERM")) == NULL) 1150 term = DEFAULT_TERM; 1151 hardcopy = 0; 1152 if (tgetent(termbuf, term) != TGETENT_OK) 1153 hardcopy = 1; 1154 if (ltgetflag("hc")) 1155 hardcopy = 1; 1156 1157 /* 1158 * Get size of the screen. 1159 */ 1160 scrsize(); 1161 pos_init(); 1162 1163 auto_wrap = ltgetflag("am"); 1164 ignaw = ltgetflag("xn"); 1165 above_mem = ltgetflag("da"); 1166 below_mem = ltgetflag("db"); 1167 clear_bg = ltgetflag("ut"); 1168 1169 /* 1170 * Assumes termcap variable "sg" is the printing width of: 1171 * the standout sequence, the end standout sequence, 1172 * the underline sequence, the end underline sequence, 1173 * the boldface sequence, and the end boldface sequence. 1174 */ 1175 if ((so_s_width = ltgetnum("sg")) < 0) 1176 so_s_width = 0; 1177 so_e_width = so_s_width; 1178 1179 bo_s_width = bo_e_width = so_s_width; 1180 ul_s_width = ul_e_width = so_s_width; 1181 bl_s_width = bl_e_width = so_s_width; 1182 1183 #if HILITE_SEARCH 1184 if (so_s_width > 0 || so_e_width > 0) 1185 /* 1186 * Disable highlighting by default on magic cookie terminals. 1187 * Turning on highlighting might change the displayed width 1188 * of a line, causing the display to get messed up. 1189 * The user can turn it back on with -g, 1190 * but she won't like the results. 1191 */ 1192 hilite_search = 0; 1193 #endif 1194 1195 /* 1196 * Get various string-valued capabilities. 1197 */ 1198 sp = sbuf; 1199 1200 #if HAVE_OSPEED 1201 sc_pad = ltgetstr("pc", &sp); 1202 if (sc_pad != NULL) 1203 PC = *sc_pad; 1204 #endif 1205 1206 sc_s_keypad = ltgetstr("ks", &sp); 1207 if (sc_s_keypad == NULL) 1208 sc_s_keypad = ""; 1209 sc_e_keypad = ltgetstr("ke", &sp); 1210 if (sc_e_keypad == NULL) 1211 sc_e_keypad = ""; 1212 kent = ltgetstr("@8", &sp); 1213 1214 sc_s_mousecap = ltgetstr("MOUSE_START", &sp); 1215 if (sc_s_mousecap == NULL) 1216 sc_s_mousecap = ESCS "[?1000h" ESCS "[?1006h"; 1217 sc_e_mousecap = ltgetstr("MOUSE_END", &sp); 1218 if (sc_e_mousecap == NULL) 1219 sc_e_mousecap = ESCS "[?1006l" ESCS "[?1000l"; 1220 1221 sc_init = ltgetstr("ti", &sp); 1222 if (sc_init == NULL) 1223 sc_init = ""; 1224 1225 sc_deinit= ltgetstr("te", &sp); 1226 if (sc_deinit == NULL) 1227 sc_deinit = ""; 1228 1229 sc_eol_clear = ltgetstr("ce", &sp); 1230 if (sc_eol_clear == NULL || *sc_eol_clear == '\0') 1231 { 1232 missing_cap = 1; 1233 sc_eol_clear = ""; 1234 } 1235 1236 sc_eos_clear = ltgetstr("cd", &sp); 1237 if (below_mem && (sc_eos_clear == NULL || *sc_eos_clear == '\0')) 1238 { 1239 missing_cap = 1; 1240 sc_eos_clear = ""; 1241 } 1242 1243 sc_clear = ltgetstr("cl", &sp); 1244 if (sc_clear == NULL || *sc_clear == '\0') 1245 { 1246 missing_cap = 1; 1247 sc_clear = "\n\n"; 1248 } 1249 1250 sc_move = ltgetstr("cm", &sp); 1251 if (sc_move == NULL || *sc_move == '\0') 1252 { 1253 /* 1254 * This is not an error here, because we don't 1255 * always need sc_move. 1256 * We need it only if we don't have home or lower-left. 1257 */ 1258 sc_move = ""; 1259 can_goto_line = 0; 1260 } else 1261 can_goto_line = 1; 1262 1263 tmodes("so", "se", &sc_s_in, &sc_s_out, "", "", &sp); 1264 tmodes("us", "ue", &sc_u_in, &sc_u_out, sc_s_in, sc_s_out, &sp); 1265 tmodes("md", "me", &sc_b_in, &sc_b_out, sc_s_in, sc_s_out, &sp); 1266 tmodes("mb", "me", &sc_bl_in, &sc_bl_out, sc_s_in, sc_s_out, &sp); 1267 1268 sc_visual_bell = ltgetstr("vb", &sp); 1269 if (sc_visual_bell == NULL) 1270 sc_visual_bell = ""; 1271 1272 if (ltgetflag("bs")) 1273 sc_backspace = "\b"; 1274 else 1275 { 1276 sc_backspace = ltgetstr("bc", &sp); 1277 if (sc_backspace == NULL || *sc_backspace == '\0') 1278 sc_backspace = "\b"; 1279 } 1280 1281 /* 1282 * Choose between using "ho" and "cm" ("home" and "cursor move") 1283 * to move the cursor to the upper left corner of the screen. 1284 */ 1285 t1 = ltgetstr("ho", &sp); 1286 if (t1 == NULL) 1287 t1 = ""; 1288 if (*sc_move == '\0') 1289 t2 = ""; 1290 else 1291 { 1292 strcpy(sp, tgoto(sc_move, 0, 0)); 1293 t2 = sp; 1294 sp += strlen(sp) + 1; 1295 } 1296 sc_home = cheaper(t1, t2, "|\b^"); 1297 1298 /* 1299 * Choose between using "ll" and "cm" ("lower left" and "cursor move") 1300 * to move the cursor to the lower left corner of the screen. 1301 */ 1302 t1 = ltgetstr("ll", &sp); 1303 if (t1 == NULL) 1304 t1 = ""; 1305 if (*sc_move == '\0') 1306 t2 = ""; 1307 else 1308 { 1309 strcpy(sp, tgoto(sc_move, 0, sc_height-1)); 1310 t2 = sp; 1311 sp += strlen(sp) + 1; 1312 } 1313 sc_lower_left = cheaper(t1, t2, "\r"); 1314 1315 /* 1316 * Get carriage return string. 1317 */ 1318 sc_return = ltgetstr("cr", &sp); 1319 if (sc_return == NULL) 1320 sc_return = "\r"; 1321 1322 /* 1323 * Choose between using "al" or "sr" ("add line" or "scroll reverse") 1324 * to add a line at the top of the screen. 1325 */ 1326 t1 = ltgetstr("al", &sp); 1327 if (t1 == NULL) 1328 t1 = ""; 1329 t2 = ltgetstr("sr", &sp); 1330 if (t2 == NULL) 1331 t2 = ""; 1332 #if OS2 1333 if (*t1 == '\0' && *t2 == '\0') 1334 sc_addline = ""; 1335 else 1336 #endif 1337 if (above_mem) 1338 sc_addline = t1; 1339 else 1340 sc_addline = cheaper(t1, t2, ""); 1341 if (*sc_addline == '\0') 1342 { 1343 /* 1344 * Force repaint on any backward movement. 1345 */ 1346 no_back_scroll = 1; 1347 } 1348 } 1349 #endif /* MSDOS_COMPILER */ 1350 } 1351 1352 #if !MSDOS_COMPILER 1353 /* 1354 * Return the cost of displaying a termcap string. 1355 * We use the trick of calling tputs, but as a char printing function 1356 * we give it inc_costcount, which just increments "costcount". 1357 * This tells us how many chars would be printed by using this string. 1358 * {{ Couldn't we just use strlen? }} 1359 */ 1360 static int costcount; 1361 1362 /*ARGSUSED*/ 1363 static int 1364 inc_costcount(c) 1365 int c; 1366 { 1367 costcount++; 1368 return (c); 1369 } 1370 1371 static int 1372 cost(t) 1373 char *t; 1374 { 1375 costcount = 0; 1376 tputs(t, sc_height, inc_costcount); 1377 return (costcount); 1378 } 1379 1380 /* 1381 * Return the "best" of the two given termcap strings. 1382 * The best, if both exist, is the one with the lower 1383 * cost (see cost() function). 1384 */ 1385 static char * 1386 cheaper(t1, t2, def) 1387 char *t1, *t2; 1388 char *def; 1389 { 1390 if (*t1 == '\0' && *t2 == '\0') 1391 { 1392 missing_cap = 1; 1393 return (def); 1394 } 1395 if (*t1 == '\0') 1396 return (t2); 1397 if (*t2 == '\0') 1398 return (t1); 1399 if (cost(t1) < cost(t2)) 1400 return (t1); 1401 return (t2); 1402 } 1403 1404 static void 1405 tmodes(incap, outcap, instr, outstr, def_instr, def_outstr, spp) 1406 char *incap; 1407 char *outcap; 1408 char **instr; 1409 char **outstr; 1410 char *def_instr; 1411 char *def_outstr; 1412 char **spp; 1413 { 1414 *instr = ltgetstr(incap, spp); 1415 if (*instr == NULL) 1416 { 1417 /* Use defaults. */ 1418 *instr = def_instr; 1419 *outstr = def_outstr; 1420 return; 1421 } 1422 1423 *outstr = ltgetstr(outcap, spp); 1424 if (*outstr == NULL) 1425 /* No specific out capability; use "me". */ 1426 *outstr = ltgetstr("me", spp); 1427 if (*outstr == NULL) 1428 /* Don't even have "me"; use a null string. */ 1429 *outstr = ""; 1430 } 1431 1432 #endif /* MSDOS_COMPILER */ 1433 1434 1435 /* 1436 * Below are the functions which perform all the 1437 * terminal-specific screen manipulation. 1438 */ 1439 1440 1441 #if MSDOS_COMPILER 1442 1443 #if MSDOS_COMPILER==WIN32C 1444 static void 1445 _settextposition(int row, int col) 1446 { 1447 COORD cpos; 1448 CONSOLE_SCREEN_BUFFER_INFO csbi; 1449 1450 GetConsoleScreenBufferInfo(con_out, &csbi); 1451 cpos.X = csbi.srWindow.Left + (col - 1); 1452 cpos.Y = csbi.srWindow.Top + (row - 1); 1453 SetConsoleCursorPosition(con_out, cpos); 1454 } 1455 #endif 1456 1457 /* 1458 * Initialize the screen to the correct color at startup. 1459 */ 1460 static void 1461 initcolor(VOID_PARAM) 1462 { 1463 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 1464 intensevideo(); 1465 #endif 1466 SETCOLORS(nm_fg_color, nm_bg_color); 1467 #if 0 1468 /* 1469 * This clears the screen at startup. This is different from 1470 * the behavior of other versions of less. Disable it for now. 1471 */ 1472 char *blanks; 1473 int row; 1474 int col; 1475 1476 /* 1477 * Create a complete, blank screen using "normal" colors. 1478 */ 1479 SETCOLORS(nm_fg_color, nm_bg_color); 1480 blanks = (char *) ecalloc(width+1, sizeof(char)); 1481 for (col = 0; col < sc_width; col++) 1482 blanks[col] = ' '; 1483 blanks[sc_width] = '\0'; 1484 for (row = 0; row < sc_height; row++) 1485 _outtext(blanks); 1486 free(blanks); 1487 #endif 1488 } 1489 #endif 1490 1491 #if MSDOS_COMPILER==WIN32C 1492 1493 /* 1494 * Termcap-like init with a private win32 console. 1495 */ 1496 static void 1497 win32_init_term(VOID_PARAM) 1498 { 1499 CONSOLE_SCREEN_BUFFER_INFO scr; 1500 COORD size; 1501 1502 if (con_out_save == INVALID_HANDLE_VALUE) 1503 return; 1504 1505 GetConsoleScreenBufferInfo(con_out_save, &scr); 1506 1507 if (con_out_ours == INVALID_HANDLE_VALUE) 1508 { 1509 DWORD output_mode; 1510 1511 /* 1512 * Create our own screen buffer, so that we 1513 * may restore the original when done. 1514 */ 1515 con_out_ours = CreateConsoleScreenBuffer( 1516 GENERIC_WRITE | GENERIC_READ, 1517 FILE_SHARE_WRITE | FILE_SHARE_READ, 1518 (LPSECURITY_ATTRIBUTES) NULL, 1519 CONSOLE_TEXTMODE_BUFFER, 1520 (LPVOID) NULL); 1521 /* 1522 * Enable underline, if available. 1523 */ 1524 GetConsoleMode(con_out_ours, &output_mode); 1525 have_ul = SetConsoleMode(con_out_ours, 1526 output_mode | ENABLE_VIRTUAL_TERMINAL_PROCESSING); 1527 } 1528 1529 size.X = scr.srWindow.Right - scr.srWindow.Left + 1; 1530 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1; 1531 SetConsoleScreenBufferSize(con_out_ours, size); 1532 SetConsoleActiveScreenBuffer(con_out_ours); 1533 con_out = con_out_ours; 1534 } 1535 1536 /* 1537 * Restore the startup console. 1538 */ 1539 static void 1540 win32_deinit_term(VOID_PARAM) 1541 { 1542 if (con_out_save == INVALID_HANDLE_VALUE) 1543 return; 1544 if (quitting) 1545 (void) CloseHandle(con_out_ours); 1546 SetConsoleActiveScreenBuffer(con_out_save); 1547 con_out = con_out_save; 1548 } 1549 1550 #endif 1551 1552 /* 1553 * Configure the termimal so mouse clicks and wheel moves 1554 * produce input to less. 1555 */ 1556 public void 1557 init_mouse(VOID_PARAM) 1558 { 1559 if (!mousecap) 1560 return; 1561 #if !MSDOS_COMPILER 1562 tputs(sc_s_mousecap, sc_height, putchr); 1563 #else 1564 #if MSDOS_COMPILER==WIN32C 1565 SetConsoleMode(tty, ENABLE_PROCESSED_INPUT | ENABLE_MOUSE_INPUT); 1566 #endif 1567 #endif 1568 } 1569 1570 /* 1571 * Configure the terminal so mouse clicks and wheel moves 1572 * are handled by the system (so text can be selected, etc). 1573 */ 1574 public void 1575 deinit_mouse(VOID_PARAM) 1576 { 1577 if (!mousecap) 1578 return; 1579 #if !MSDOS_COMPILER 1580 tputs(sc_e_mousecap, sc_height, putchr); 1581 #else 1582 #if MSDOS_COMPILER==WIN32C 1583 SetConsoleMode(tty, ENABLE_PROCESSED_INPUT); 1584 #endif 1585 #endif 1586 } 1587 1588 /* 1589 * Initialize terminal 1590 */ 1591 public void 1592 init(VOID_PARAM) 1593 { 1594 #if !MSDOS_COMPILER 1595 if (!(quit_if_one_screen && one_screen)) 1596 { 1597 if (!no_init) 1598 tputs(sc_init, sc_height, putchr); 1599 if (!no_keypad) 1600 tputs(sc_s_keypad, sc_height, putchr); 1601 init_mouse(); 1602 } 1603 if (top_scroll) 1604 { 1605 int i; 1606 1607 /* 1608 * This is nice to terminals with no alternate screen, 1609 * but with saved scrolled-off-the-top lines. This way, 1610 * no previous line is lost, but we start with a whole 1611 * screen to ourself. 1612 */ 1613 for (i = 1; i < sc_height; i++) 1614 putchr('\n'); 1615 } else 1616 line_left(); 1617 #else 1618 #if MSDOS_COMPILER==WIN32C 1619 if (!no_init) 1620 win32_init_term(); 1621 #endif 1622 initcolor(); 1623 flush(); 1624 #endif 1625 init_done = 1; 1626 } 1627 1628 /* 1629 * Deinitialize terminal 1630 */ 1631 public void 1632 deinit(VOID_PARAM) 1633 { 1634 if (!init_done) 1635 return; 1636 #if !MSDOS_COMPILER 1637 if (!(quit_if_one_screen && one_screen)) 1638 { 1639 deinit_mouse(); 1640 if (!no_keypad) 1641 tputs(sc_e_keypad, sc_height, putchr); 1642 if (!no_init) 1643 tputs(sc_deinit, sc_height, putchr); 1644 } 1645 #else 1646 /* Restore system colors. */ 1647 SETCOLORS(sy_fg_color, sy_bg_color); 1648 #if MSDOS_COMPILER==WIN32C 1649 if (!no_init) 1650 win32_deinit_term(); 1651 #else 1652 /* Need clreol to make SETCOLORS take effect. */ 1653 clreol(); 1654 #endif 1655 #endif 1656 init_done = 0; 1657 } 1658 1659 /* 1660 * Home cursor (move to upper left corner of screen). 1661 */ 1662 public void 1663 home(VOID_PARAM) 1664 { 1665 #if !MSDOS_COMPILER 1666 tputs(sc_home, 1, putchr); 1667 #else 1668 flush(); 1669 _settextposition(1,1); 1670 #endif 1671 } 1672 1673 /* 1674 * Add a blank line (called with cursor at home). 1675 * Should scroll the display down. 1676 */ 1677 public void 1678 add_line(VOID_PARAM) 1679 { 1680 #if !MSDOS_COMPILER 1681 tputs(sc_addline, sc_height, putchr); 1682 #else 1683 flush(); 1684 #if MSDOS_COMPILER==MSOFTC 1685 _scrolltextwindow(_GSCROLLDOWN); 1686 _settextposition(1,1); 1687 #else 1688 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 1689 movetext(1,1, sc_width,sc_height-1, 1,2); 1690 gotoxy(1,1); 1691 clreol(); 1692 #else 1693 #if MSDOS_COMPILER==WIN32C 1694 { 1695 CHAR_INFO fillchar; 1696 SMALL_RECT rcSrc, rcClip; 1697 COORD new_org; 1698 CONSOLE_SCREEN_BUFFER_INFO csbi; 1699 1700 GetConsoleScreenBufferInfo(con_out,&csbi); 1701 1702 /* The clip rectangle is the entire visible screen. */ 1703 rcClip.Left = csbi.srWindow.Left; 1704 rcClip.Top = csbi.srWindow.Top; 1705 rcClip.Right = csbi.srWindow.Right; 1706 rcClip.Bottom = csbi.srWindow.Bottom; 1707 1708 /* The source rectangle is the visible screen minus the last line. */ 1709 rcSrc = rcClip; 1710 rcSrc.Bottom--; 1711 1712 /* Move the top left corner of the source window down one row. */ 1713 new_org.X = rcSrc.Left; 1714 new_org.Y = rcSrc.Top + 1; 1715 1716 /* Fill the right character and attributes. */ 1717 fillchar.Char.AsciiChar = ' '; 1718 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 1719 fillchar.Attributes = curr_attr; 1720 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); 1721 _settextposition(1,1); 1722 } 1723 #endif 1724 #endif 1725 #endif 1726 #endif 1727 } 1728 1729 #if 0 1730 /* 1731 * Remove the n topmost lines and scroll everything below it in the 1732 * window upward. This is needed to stop leaking the topmost line 1733 * into the scrollback buffer when we go down-one-line (in WIN32). 1734 */ 1735 public void 1736 remove_top(n) 1737 int n; 1738 { 1739 #if MSDOS_COMPILER==WIN32C 1740 SMALL_RECT rcSrc, rcClip; 1741 CHAR_INFO fillchar; 1742 COORD new_org; 1743 CONSOLE_SCREEN_BUFFER_INFO csbi; /* to get buffer info */ 1744 1745 if (n >= sc_height - 1) 1746 { 1747 clear(); 1748 home(); 1749 return; 1750 } 1751 1752 flush(); 1753 1754 GetConsoleScreenBufferInfo(con_out, &csbi); 1755 1756 /* Get the extent of all-visible-rows-but-the-last. */ 1757 rcSrc.Left = csbi.srWindow.Left; 1758 rcSrc.Top = csbi.srWindow.Top + n; 1759 rcSrc.Right = csbi.srWindow.Right; 1760 rcSrc.Bottom = csbi.srWindow.Bottom; 1761 1762 /* Get the clip rectangle. */ 1763 rcClip.Left = rcSrc.Left; 1764 rcClip.Top = csbi.srWindow.Top; 1765 rcClip.Right = rcSrc.Right; 1766 rcClip.Bottom = rcSrc.Bottom ; 1767 1768 /* Move the source window up n rows. */ 1769 new_org.X = rcSrc.Left; 1770 new_org.Y = rcSrc.Top - n; 1771 1772 /* Fill the right character and attributes. */ 1773 fillchar.Char.AsciiChar = ' '; 1774 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 1775 fillchar.Attributes = curr_attr; 1776 1777 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); 1778 1779 /* Position cursor on first blank line. */ 1780 goto_line(sc_height - n - 1); 1781 #endif 1782 } 1783 #endif 1784 1785 #if MSDOS_COMPILER==WIN32C 1786 /* 1787 * Clear the screen. 1788 */ 1789 static void 1790 win32_clear(VOID_PARAM) 1791 { 1792 /* 1793 * This will clear only the currently visible rows of the NT 1794 * console buffer, which means none of the precious scrollback 1795 * rows are touched making for faster scrolling. Note that, if 1796 * the window has fewer columns than the console buffer (i.e. 1797 * there is a horizontal scrollbar as well), the entire width 1798 * of the visible rows will be cleared. 1799 */ 1800 COORD topleft; 1801 DWORD nchars; 1802 DWORD winsz; 1803 CONSOLE_SCREEN_BUFFER_INFO csbi; 1804 1805 /* get the number of cells in the current buffer */ 1806 GetConsoleScreenBufferInfo(con_out, &csbi); 1807 winsz = csbi.dwSize.X * (csbi.srWindow.Bottom - csbi.srWindow.Top + 1); 1808 topleft.X = 0; 1809 topleft.Y = csbi.srWindow.Top; 1810 1811 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 1812 FillConsoleOutputCharacter(con_out, ' ', winsz, topleft, &nchars); 1813 FillConsoleOutputAttribute(con_out, curr_attr, winsz, topleft, &nchars); 1814 } 1815 1816 /* 1817 * Remove the n topmost lines and scroll everything below it in the 1818 * window upward. 1819 */ 1820 public void 1821 win32_scroll_up(n) 1822 int n; 1823 { 1824 SMALL_RECT rcSrc, rcClip; 1825 CHAR_INFO fillchar; 1826 COORD topleft; 1827 COORD new_org; 1828 DWORD nchars; 1829 DWORD size; 1830 CONSOLE_SCREEN_BUFFER_INFO csbi; 1831 1832 if (n <= 0) 1833 return; 1834 1835 if (n >= sc_height - 1) 1836 { 1837 win32_clear(); 1838 _settextposition(1,1); 1839 return; 1840 } 1841 1842 /* Get the extent of what will remain visible after scrolling. */ 1843 GetConsoleScreenBufferInfo(con_out, &csbi); 1844 rcSrc.Left = csbi.srWindow.Left; 1845 rcSrc.Top = csbi.srWindow.Top + n; 1846 rcSrc.Right = csbi.srWindow.Right; 1847 rcSrc.Bottom = csbi.srWindow.Bottom; 1848 1849 /* Get the clip rectangle. */ 1850 rcClip.Left = rcSrc.Left; 1851 rcClip.Top = csbi.srWindow.Top; 1852 rcClip.Right = rcSrc.Right; 1853 rcClip.Bottom = rcSrc.Bottom ; 1854 1855 /* Move the source text to the top of the screen. */ 1856 new_org.X = rcSrc.Left; 1857 new_org.Y = rcClip.Top; 1858 1859 /* Fill the right character and attributes. */ 1860 fillchar.Char.AsciiChar = ' '; 1861 fillchar.Attributes = MAKEATTR(nm_fg_color, nm_bg_color); 1862 1863 /* Scroll the window. */ 1864 SetConsoleTextAttribute(con_out, fillchar.Attributes); 1865 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); 1866 1867 /* Clear remaining lines at bottom. */ 1868 topleft.X = csbi.dwCursorPosition.X; 1869 topleft.Y = rcSrc.Bottom - n; 1870 size = (n * csbi.dwSize.X) + (rcSrc.Right - topleft.X); 1871 FillConsoleOutputCharacter(con_out, ' ', size, topleft, 1872 &nchars); 1873 FillConsoleOutputAttribute(con_out, fillchar.Attributes, size, topleft, 1874 &nchars); 1875 SetConsoleTextAttribute(con_out, curr_attr); 1876 1877 /* Move cursor n lines up from where it was. */ 1878 csbi.dwCursorPosition.Y -= n; 1879 SetConsoleCursorPosition(con_out, csbi.dwCursorPosition); 1880 } 1881 #endif 1882 1883 /* 1884 * Move cursor to lower left corner of screen. 1885 */ 1886 public void 1887 lower_left(VOID_PARAM) 1888 { 1889 if (!init_done) 1890 return; 1891 #if !MSDOS_COMPILER 1892 tputs(sc_lower_left, 1, putchr); 1893 #else 1894 flush(); 1895 _settextposition(sc_height, 1); 1896 #endif 1897 } 1898 1899 /* 1900 * Move cursor to left position of current line. 1901 */ 1902 public void 1903 line_left(VOID_PARAM) 1904 { 1905 #if !MSDOS_COMPILER 1906 tputs(sc_return, 1, putchr); 1907 #else 1908 int row; 1909 flush(); 1910 #if MSDOS_COMPILER==WIN32C 1911 { 1912 CONSOLE_SCREEN_BUFFER_INFO scr; 1913 GetConsoleScreenBufferInfo(con_out, &scr); 1914 row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1; 1915 } 1916 #else 1917 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 1918 row = wherey(); 1919 #else 1920 { 1921 struct rccoord tpos = _gettextposition(); 1922 row = tpos.row; 1923 } 1924 #endif 1925 #endif 1926 _settextposition(row, 1); 1927 #endif 1928 } 1929 1930 /* 1931 * Check if the console size has changed and reset internals 1932 * (in lieu of SIGWINCH for WIN32). 1933 */ 1934 public void 1935 check_winch(VOID_PARAM) 1936 { 1937 #if MSDOS_COMPILER==WIN32C 1938 CONSOLE_SCREEN_BUFFER_INFO scr; 1939 COORD size; 1940 1941 if (con_out == INVALID_HANDLE_VALUE) 1942 return; 1943 1944 flush(); 1945 GetConsoleScreenBufferInfo(con_out, &scr); 1946 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1; 1947 size.X = scr.srWindow.Right - scr.srWindow.Left + 1; 1948 if (size.Y != sc_height || size.X != sc_width) 1949 { 1950 sc_height = size.Y; 1951 sc_width = size.X; 1952 if (!no_init && con_out_ours == con_out) 1953 SetConsoleScreenBufferSize(con_out, size); 1954 pos_init(); 1955 wscroll = (sc_height + 1) / 2; 1956 screen_trashed = 1; 1957 } 1958 #endif 1959 } 1960 1961 /* 1962 * Goto a specific line on the screen. 1963 */ 1964 public void 1965 goto_line(sindex) 1966 int sindex; 1967 { 1968 #if !MSDOS_COMPILER 1969 tputs(tgoto(sc_move, 0, sindex), 1, putchr); 1970 #else 1971 flush(); 1972 _settextposition(sindex+1, 1); 1973 #endif 1974 } 1975 1976 #if MSDOS_COMPILER==MSOFTC || MSDOS_COMPILER==BORLANDC 1977 /* 1978 * Create an alternate screen which is all white. 1979 * This screen is used to create a "flash" effect, by displaying it 1980 * briefly and then switching back to the normal screen. 1981 * {{ Yuck! There must be a better way to get a visual bell. }} 1982 */ 1983 static void 1984 create_flash(VOID_PARAM) 1985 { 1986 #if MSDOS_COMPILER==MSOFTC 1987 struct videoconfig w; 1988 char *blanks; 1989 int row, col; 1990 1991 _getvideoconfig(&w); 1992 videopages = w.numvideopages; 1993 if (videopages < 2) 1994 { 1995 at_enter(AT_STANDOUT); 1996 at_exit(); 1997 } else 1998 { 1999 _setactivepage(1); 2000 at_enter(AT_STANDOUT); 2001 blanks = (char *) ecalloc(w.numtextcols, sizeof(char)); 2002 for (col = 0; col < w.numtextcols; col++) 2003 blanks[col] = ' '; 2004 for (row = w.numtextrows; row > 0; row--) 2005 _outmem(blanks, w.numtextcols); 2006 _setactivepage(0); 2007 _setvisualpage(0); 2008 free(blanks); 2009 at_exit(); 2010 } 2011 #else 2012 #if MSDOS_COMPILER==BORLANDC 2013 int n; 2014 2015 whitescreen = (unsigned short *) 2016 malloc(sc_width * sc_height * sizeof(short)); 2017 if (whitescreen == NULL) 2018 return; 2019 for (n = 0; n < sc_width * sc_height; n++) 2020 whitescreen[n] = 0x7020; 2021 #endif 2022 #endif 2023 flash_created = 1; 2024 } 2025 #endif /* MSDOS_COMPILER */ 2026 2027 /* 2028 * Output the "visual bell", if there is one. 2029 */ 2030 public void 2031 vbell(VOID_PARAM) 2032 { 2033 #if !MSDOS_COMPILER 2034 if (*sc_visual_bell == '\0') 2035 return; 2036 tputs(sc_visual_bell, sc_height, putchr); 2037 #else 2038 #if MSDOS_COMPILER==DJGPPC 2039 ScreenVisualBell(); 2040 #else 2041 #if MSDOS_COMPILER==MSOFTC 2042 /* 2043 * Create a flash screen on the second video page. 2044 * Switch to that page, then switch back. 2045 */ 2046 if (!flash_created) 2047 create_flash(); 2048 if (videopages < 2) 2049 return; 2050 _setvisualpage(1); 2051 delay(100); 2052 _setvisualpage(0); 2053 #else 2054 #if MSDOS_COMPILER==BORLANDC 2055 unsigned short *currscreen; 2056 2057 /* 2058 * Get a copy of the current screen. 2059 * Display the flash screen. 2060 * Then restore the old screen. 2061 */ 2062 if (!flash_created) 2063 create_flash(); 2064 if (whitescreen == NULL) 2065 return; 2066 currscreen = (unsigned short *) 2067 malloc(sc_width * sc_height * sizeof(short)); 2068 if (currscreen == NULL) return; 2069 gettext(1, 1, sc_width, sc_height, currscreen); 2070 puttext(1, 1, sc_width, sc_height, whitescreen); 2071 delay(100); 2072 puttext(1, 1, sc_width, sc_height, currscreen); 2073 free(currscreen); 2074 #else 2075 #if MSDOS_COMPILER==WIN32C 2076 /* paint screen with an inverse color */ 2077 clear(); 2078 2079 /* leave it displayed for 100 msec. */ 2080 Sleep(100); 2081 2082 /* restore with a redraw */ 2083 repaint(); 2084 #endif 2085 #endif 2086 #endif 2087 #endif 2088 #endif 2089 } 2090 2091 /* 2092 * Make a noise. 2093 */ 2094 static void 2095 beep(VOID_PARAM) 2096 { 2097 #if !MSDOS_COMPILER 2098 putchr(CONTROL('G')); 2099 #else 2100 #if MSDOS_COMPILER==WIN32C 2101 MessageBeep(0); 2102 #else 2103 write(1, "\7", 1); 2104 #endif 2105 #endif 2106 } 2107 2108 /* 2109 * Ring the terminal bell. 2110 */ 2111 public void 2112 bell(VOID_PARAM) 2113 { 2114 if (quiet == VERY_QUIET) 2115 vbell(); 2116 else 2117 beep(); 2118 } 2119 2120 /* 2121 * Clear the screen. 2122 */ 2123 public void 2124 clear(VOID_PARAM) 2125 { 2126 #if !MSDOS_COMPILER 2127 tputs(sc_clear, sc_height, putchr); 2128 #else 2129 flush(); 2130 #if MSDOS_COMPILER==WIN32C 2131 win32_clear(); 2132 #else 2133 _clearscreen(_GCLEARSCREEN); 2134 #endif 2135 #endif 2136 } 2137 2138 /* 2139 * Clear from the cursor to the end of the cursor's line. 2140 * {{ This must not move the cursor. }} 2141 */ 2142 public void 2143 clear_eol(VOID_PARAM) 2144 { 2145 #if !MSDOS_COMPILER 2146 tputs(sc_eol_clear, 1, putchr); 2147 #else 2148 #if MSDOS_COMPILER==MSOFTC 2149 short top, left; 2150 short bot, right; 2151 struct rccoord tpos; 2152 2153 flush(); 2154 /* 2155 * Save current state. 2156 */ 2157 tpos = _gettextposition(); 2158 _gettextwindow(&top, &left, &bot, &right); 2159 /* 2160 * Set a temporary window to the current line, 2161 * from the cursor's position to the right edge of the screen. 2162 * Then clear that window. 2163 */ 2164 _settextwindow(tpos.row, tpos.col, tpos.row, sc_width); 2165 _clearscreen(_GWINDOW); 2166 /* 2167 * Restore state. 2168 */ 2169 _settextwindow(top, left, bot, right); 2170 _settextposition(tpos.row, tpos.col); 2171 #else 2172 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 2173 flush(); 2174 clreol(); 2175 #else 2176 #if MSDOS_COMPILER==WIN32C 2177 DWORD nchars; 2178 COORD cpos; 2179 CONSOLE_SCREEN_BUFFER_INFO scr; 2180 2181 flush(); 2182 memset(&scr, 0, sizeof(scr)); 2183 GetConsoleScreenBufferInfo(con_out, &scr); 2184 cpos.X = scr.dwCursorPosition.X; 2185 cpos.Y = scr.dwCursorPosition.Y; 2186 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 2187 FillConsoleOutputAttribute(con_out, curr_attr, 2188 scr.dwSize.X - cpos.X, cpos, &nchars); 2189 FillConsoleOutputCharacter(con_out, ' ', 2190 scr.dwSize.X - cpos.X, cpos, &nchars); 2191 #endif 2192 #endif 2193 #endif 2194 #endif 2195 } 2196 2197 /* 2198 * Clear the current line. 2199 * Clear the screen if there's off-screen memory below the display. 2200 */ 2201 static void 2202 clear_eol_bot(VOID_PARAM) 2203 { 2204 #if MSDOS_COMPILER 2205 clear_eol(); 2206 #else 2207 if (below_mem) 2208 tputs(sc_eos_clear, 1, putchr); 2209 else 2210 tputs(sc_eol_clear, 1, putchr); 2211 #endif 2212 } 2213 2214 /* 2215 * Clear the bottom line of the display. 2216 * Leave the cursor at the beginning of the bottom line. 2217 */ 2218 public void 2219 clear_bot(VOID_PARAM) 2220 { 2221 /* 2222 * If we're in a non-normal attribute mode, temporarily exit 2223 * the mode while we do the clear. Some terminals fill the 2224 * cleared area with the current attribute. 2225 */ 2226 if (oldbot) 2227 lower_left(); 2228 else 2229 line_left(); 2230 2231 if (attrmode == AT_NORMAL) 2232 clear_eol_bot(); 2233 else 2234 { 2235 int saved_attrmode = attrmode; 2236 2237 at_exit(); 2238 clear_eol_bot(); 2239 at_enter(saved_attrmode); 2240 } 2241 } 2242 2243 public void 2244 at_enter(attr) 2245 int attr; 2246 { 2247 attr = apply_at_specials(attr); 2248 2249 #if !MSDOS_COMPILER 2250 /* The one with the most priority is last. */ 2251 if (attr & AT_UNDERLINE) 2252 tputs(sc_u_in, 1, putchr); 2253 if (attr & AT_BOLD) 2254 tputs(sc_b_in, 1, putchr); 2255 if (attr & AT_BLINK) 2256 tputs(sc_bl_in, 1, putchr); 2257 if (attr & AT_STANDOUT) 2258 tputs(sc_s_in, 1, putchr); 2259 #else 2260 flush(); 2261 /* The one with the most priority is first. */ 2262 if (attr & AT_STANDOUT) 2263 { 2264 SETCOLORS(so_fg_color, so_bg_color); 2265 } else if (attr & AT_BLINK) 2266 { 2267 SETCOLORS(bl_fg_color, bl_bg_color); 2268 } 2269 else if (attr & AT_BOLD) 2270 { 2271 SETCOLORS(bo_fg_color, bo_bg_color); 2272 } 2273 else if (attr & AT_UNDERLINE) 2274 { 2275 SETCOLORS(ul_fg_color, ul_bg_color); 2276 } 2277 #endif 2278 2279 attrmode = attr; 2280 } 2281 2282 public void 2283 at_exit(VOID_PARAM) 2284 { 2285 #if !MSDOS_COMPILER 2286 /* Undo things in the reverse order we did them. */ 2287 if (attrmode & AT_STANDOUT) 2288 tputs(sc_s_out, 1, putchr); 2289 if (attrmode & AT_BLINK) 2290 tputs(sc_bl_out, 1, putchr); 2291 if (attrmode & AT_BOLD) 2292 tputs(sc_b_out, 1, putchr); 2293 if (attrmode & AT_UNDERLINE) 2294 tputs(sc_u_out, 1, putchr); 2295 #else 2296 flush(); 2297 SETCOLORS(nm_fg_color, nm_bg_color); 2298 #endif 2299 2300 attrmode = AT_NORMAL; 2301 } 2302 2303 public void 2304 at_switch(attr) 2305 int attr; 2306 { 2307 int new_attrmode = apply_at_specials(attr); 2308 int ignore_modes = AT_ANSI; 2309 2310 if ((new_attrmode & ~ignore_modes) != (attrmode & ~ignore_modes)) 2311 { 2312 at_exit(); 2313 at_enter(attr); 2314 } 2315 } 2316 2317 public int 2318 is_at_equiv(attr1, attr2) 2319 int attr1; 2320 int attr2; 2321 { 2322 attr1 = apply_at_specials(attr1); 2323 attr2 = apply_at_specials(attr2); 2324 2325 return (attr1 == attr2); 2326 } 2327 2328 public int 2329 apply_at_specials(attr) 2330 int attr; 2331 { 2332 if (attr & AT_BINARY) 2333 attr |= binattr; 2334 if (attr & AT_HILITE) 2335 attr |= AT_STANDOUT; 2336 attr &= ~(AT_BINARY|AT_HILITE); 2337 2338 return attr; 2339 } 2340 2341 #if 0 /* No longer used */ 2342 /* 2343 * Erase the character to the left of the cursor 2344 * and move the cursor left. 2345 */ 2346 public void 2347 backspace(VOID_PARAM) 2348 { 2349 #if !MSDOS_COMPILER 2350 /* 2351 * Erase the previous character by overstriking with a space. 2352 */ 2353 tputs(sc_backspace, 1, putchr); 2354 putchr(' '); 2355 tputs(sc_backspace, 1, putchr); 2356 #else 2357 #if MSDOS_COMPILER==MSOFTC 2358 struct rccoord tpos; 2359 2360 flush(); 2361 tpos = _gettextposition(); 2362 if (tpos.col <= 1) 2363 return; 2364 _settextposition(tpos.row, tpos.col-1); 2365 _outtext(" "); 2366 _settextposition(tpos.row, tpos.col-1); 2367 #else 2368 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 2369 cputs("\b"); 2370 #else 2371 #if MSDOS_COMPILER==WIN32C 2372 COORD cpos; 2373 DWORD cChars; 2374 CONSOLE_SCREEN_BUFFER_INFO scr; 2375 2376 flush(); 2377 GetConsoleScreenBufferInfo(con_out, &scr); 2378 cpos = scr.dwCursorPosition; 2379 if (cpos.X <= 0) 2380 return; 2381 cpos.X--; 2382 SetConsoleCursorPosition(con_out, cpos); 2383 FillConsoleOutputCharacter(con_out, (TCHAR)' ', 1, cpos, &cChars); 2384 SetConsoleCursorPosition(con_out, cpos); 2385 #endif 2386 #endif 2387 #endif 2388 #endif 2389 } 2390 #endif /* 0 */ 2391 2392 /* 2393 * Output a plain backspace, without erasing the previous char. 2394 */ 2395 public void 2396 putbs(VOID_PARAM) 2397 { 2398 if (termcap_debug) 2399 putstr("<bs>"); 2400 else 2401 { 2402 #if !MSDOS_COMPILER 2403 tputs(sc_backspace, 1, putchr); 2404 #else 2405 int row, col; 2406 2407 flush(); 2408 { 2409 #if MSDOS_COMPILER==MSOFTC 2410 struct rccoord tpos; 2411 tpos = _gettextposition(); 2412 row = tpos.row; 2413 col = tpos.col; 2414 #else 2415 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 2416 row = wherey(); 2417 col = wherex(); 2418 #else 2419 #if MSDOS_COMPILER==WIN32C 2420 CONSOLE_SCREEN_BUFFER_INFO scr; 2421 GetConsoleScreenBufferInfo(con_out, &scr); 2422 row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1; 2423 col = scr.dwCursorPosition.X - scr.srWindow.Left + 1; 2424 #endif 2425 #endif 2426 #endif 2427 } 2428 if (col <= 1) 2429 return; 2430 _settextposition(row, col-1); 2431 #endif /* MSDOS_COMPILER */ 2432 } 2433 } 2434 2435 #if MSDOS_COMPILER==WIN32C 2436 /* 2437 * Determine whether an input character is waiting to be read. 2438 */ 2439 public int 2440 win32_kbhit(VOID_PARAM) 2441 { 2442 INPUT_RECORD ip; 2443 DWORD read; 2444 2445 if (keyCount > 0) 2446 return (TRUE); 2447 2448 currentKey.ascii = 0; 2449 currentKey.scan = 0; 2450 2451 if (x11mouseCount > 0) 2452 { 2453 currentKey.ascii = x11mousebuf[x11mousePos++]; 2454 --x11mouseCount; 2455 keyCount = 1; 2456 return (TRUE); 2457 } 2458 2459 /* 2460 * Wait for a real key-down event, but 2461 * ignore SHIFT and CONTROL key events. 2462 */ 2463 do 2464 { 2465 PeekConsoleInput(tty, &ip, 1, &read); 2466 if (read == 0) 2467 return (FALSE); 2468 ReadConsoleInput(tty, &ip, 1, &read); 2469 /* generate an X11 mouse sequence from the mouse event */ 2470 if (mousecap && ip.EventType == MOUSE_EVENT && 2471 ip.Event.MouseEvent.dwEventFlags != MOUSE_MOVED) 2472 { 2473 x11mousebuf[3] = X11MOUSE_OFFSET + ip.Event.MouseEvent.dwMousePosition.X + 1; 2474 x11mousebuf[4] = X11MOUSE_OFFSET + ip.Event.MouseEvent.dwMousePosition.Y + 1; 2475 switch (ip.Event.MouseEvent.dwEventFlags) 2476 { 2477 case 0: /* press or release */ 2478 if (ip.Event.MouseEvent.dwButtonState == 0) 2479 x11mousebuf[2] = X11MOUSE_OFFSET + X11MOUSE_BUTTON_REL; 2480 else if (ip.Event.MouseEvent.dwButtonState & (FROM_LEFT_3RD_BUTTON_PRESSED | FROM_LEFT_4TH_BUTTON_PRESSED)) 2481 continue; 2482 else 2483 x11mousebuf[2] = X11MOUSE_OFFSET + X11MOUSE_BUTTON1 + ((int)ip.Event.MouseEvent.dwButtonState << 1); 2484 break; 2485 case MOUSE_WHEELED: 2486 x11mousebuf[2] = X11MOUSE_OFFSET + (((int)ip.Event.MouseEvent.dwButtonState < 0) ? X11MOUSE_WHEEL_DOWN : X11MOUSE_WHEEL_UP); 2487 break; 2488 default: 2489 continue; 2490 } 2491 x11mousePos = 0; 2492 x11mouseCount = 5; 2493 currentKey.ascii = ESC; 2494 keyCount = 1; 2495 return (TRUE); 2496 } 2497 } while (ip.EventType != KEY_EVENT || 2498 ip.Event.KeyEvent.bKeyDown != TRUE || 2499 ip.Event.KeyEvent.wVirtualScanCode == 0 || 2500 ip.Event.KeyEvent.wVirtualKeyCode == VK_SHIFT || 2501 ip.Event.KeyEvent.wVirtualKeyCode == VK_CONTROL || 2502 ip.Event.KeyEvent.wVirtualKeyCode == VK_MENU); 2503 2504 currentKey.ascii = ip.Event.KeyEvent.uChar.AsciiChar; 2505 currentKey.scan = ip.Event.KeyEvent.wVirtualScanCode; 2506 keyCount = ip.Event.KeyEvent.wRepeatCount; 2507 2508 if (ip.Event.KeyEvent.dwControlKeyState & 2509 (LEFT_ALT_PRESSED | RIGHT_ALT_PRESSED)) 2510 { 2511 switch (currentKey.scan) 2512 { 2513 case PCK_ALT_E: /* letter 'E' */ 2514 currentKey.ascii = 0; 2515 break; 2516 } 2517 } else if (ip.Event.KeyEvent.dwControlKeyState & 2518 (LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED)) 2519 { 2520 switch (currentKey.scan) 2521 { 2522 case PCK_RIGHT: /* right arrow */ 2523 currentKey.scan = PCK_CTL_RIGHT; 2524 break; 2525 case PCK_LEFT: /* left arrow */ 2526 currentKey.scan = PCK_CTL_LEFT; 2527 break; 2528 case PCK_DELETE: /* delete */ 2529 currentKey.scan = PCK_CTL_DELETE; 2530 break; 2531 } 2532 } else if (ip.Event.KeyEvent.dwControlKeyState & SHIFT_PRESSED) 2533 { 2534 switch (currentKey.scan) 2535 { 2536 case PCK_SHIFT_TAB: /* tab */ 2537 currentKey.ascii = 0; 2538 break; 2539 } 2540 } 2541 2542 return (TRUE); 2543 } 2544 2545 /* 2546 * Read a character from the keyboard. 2547 */ 2548 public char 2549 WIN32getch(VOID_PARAM) 2550 { 2551 int ascii; 2552 2553 if (pending_scancode) 2554 { 2555 pending_scancode = 0; 2556 return ((char)(currentKey.scan & 0x00FF)); 2557 } 2558 2559 do { 2560 while (win32_kbhit() == FALSE) 2561 { 2562 Sleep(20); 2563 if (ABORT_SIGS()) 2564 return ('\003'); 2565 continue; 2566 } 2567 keyCount --; 2568 ascii = currentKey.ascii; 2569 /* 2570 * On PC's, the extended keys return a 2 byte sequence beginning 2571 * with '00', so if the ascii code is 00, the next byte will be 2572 * the lsb of the scan code. 2573 */ 2574 pending_scancode = (ascii == 0x00); 2575 } while (pending_scancode && 2576 (currentKey.scan == PCK_CAPS_LOCK || currentKey.scan == PCK_NUM_LOCK)); 2577 2578 return ((char)ascii); 2579 } 2580 #endif 2581 2582 #if MSDOS_COMPILER 2583 /* 2584 */ 2585 public void 2586 WIN32setcolors(fg, bg) 2587 int fg; 2588 int bg; 2589 { 2590 SETCOLORS(fg, bg); 2591 } 2592 2593 /* 2594 */ 2595 public void 2596 WIN32textout(text, len) 2597 char *text; 2598 int len; 2599 { 2600 #if MSDOS_COMPILER==WIN32C 2601 DWORD written; 2602 if (utf_mode == 2) 2603 { 2604 /* 2605 * We've got UTF-8 text in a non-UTF-8 console. Convert it to 2606 * wide and use WriteConsoleW. 2607 */ 2608 WCHAR wtext[1024]; 2609 len = MultiByteToWideChar(CP_UTF8, 0, text, len, wtext, 2610 sizeof(wtext)/sizeof(*wtext)); 2611 WriteConsoleW(con_out, wtext, len, &written, NULL); 2612 } else 2613 WriteConsole(con_out, text, len, &written, NULL); 2614 #else 2615 char c = text[len]; 2616 text[len] = '\0'; 2617 cputs(text); 2618 text[len] = c; 2619 #endif 2620 } 2621 #endif 2622