screen.c revision 330571
1/* 2 * Copyright (C) 1984-2017 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> 28extern 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" 89static char *windowid; 90#else 91#define DEFAULT_TERM "unknown" 92#endif 93 94#if MSDOS_COMPILER==MSOFTC 95static int videopages; 96static long msec_loops; 97static int flash_created = 0; 98#define SETCOLORS(fg,bg) { _settextcolor(fg); _setbkcolor(bg); } 99#endif 100 101#if MSDOS_COMPILER==BORLANDC 102static unsigned short *whitescreen; 103static 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); } 110extern int sc_height; 111#endif 112 113#if MSDOS_COMPILER==WIN32C 114struct keyRecord 115{ 116 int ascii; 117 int scan; 118} currentKey; 119 120static int keyCount = 0; 121static WORD curr_attr; 122static int pending_scancode = 0; 123static WORD *whitescreen; 124 125static HANDLE con_out_save = INVALID_HANDLE_VALUE; /* previous console */ 126static HANDLE con_out_ours = INVALID_HANDLE_VALUE; /* our own */ 127HANDLE con_out = INVALID_HANDLE_VALUE; /* current console */ 128 129extern int utf_mode; 130extern int quitting; 131static void win32_init_term(); 132static void win32_deinit_term(); 133 134#ifndef ENABLE_VIRTUAL_TERMINAL_PROCESSING 135#define ENABLE_VIRTUAL_TERMINAL_PROCESSING 4 136#endif 137 138#define FG_COLORS (FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_INTENSITY) 139#define BG_COLORS (BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE | BACKGROUND_INTENSITY) 140#define MAKEATTR(fg,bg) ((WORD)((fg)|((bg)<<4))) 141#define SETCOLORS(fg,bg) { curr_attr = MAKEATTR(fg,bg); \ 142 if (SetConsoleTextAttribute(con_out, curr_attr) == 0) \ 143 error("SETCOLORS failed", NULL_PARG); } 144#endif 145 146#if MSDOS_COMPILER 147public int nm_fg_color; /* Color of normal text */ 148public int nm_bg_color; 149public int bo_fg_color; /* Color of bold text */ 150public int bo_bg_color; 151public int ul_fg_color; /* Color of underlined text */ 152public int ul_bg_color; 153public int so_fg_color; /* Color of standout text */ 154public int so_bg_color; 155public int bl_fg_color; /* Color of blinking text */ 156public int bl_bg_color; 157static int sy_fg_color; /* Color of system text (before less) */ 158static int sy_bg_color; 159public int sgr_mode; /* Honor ANSI sequences rather than using above */ 160#if MSDOS_COMPILER==WIN32C 161public int have_ul; /* Is underline available? */ 162#endif 163#else 164 165/* 166 * Strings passed to tputs() to do various terminal functions. 167 */ 168static char 169 *sc_pad, /* Pad string */ 170 *sc_home, /* Cursor home */ 171 *sc_addline, /* Add line, scroll down following lines */ 172 *sc_lower_left, /* Cursor to last line, first column */ 173 *sc_return, /* Cursor to beginning of current line */ 174 *sc_move, /* General cursor positioning */ 175 *sc_clear, /* Clear screen */ 176 *sc_eol_clear, /* Clear to end of line */ 177 *sc_eos_clear, /* Clear to end of screen */ 178 *sc_s_in, /* Enter standout (highlighted) mode */ 179 *sc_s_out, /* Exit standout mode */ 180 *sc_u_in, /* Enter underline mode */ 181 *sc_u_out, /* Exit underline mode */ 182 *sc_b_in, /* Enter bold mode */ 183 *sc_b_out, /* Exit bold mode */ 184 *sc_bl_in, /* Enter blink mode */ 185 *sc_bl_out, /* Exit blink mode */ 186 *sc_visual_bell, /* Visual bell (flash screen) sequence */ 187 *sc_backspace, /* Backspace cursor */ 188 *sc_s_keypad, /* Start keypad mode */ 189 *sc_e_keypad, /* End keypad mode */ 190 *sc_init, /* Startup terminal initialization */ 191 *sc_deinit; /* Exit terminal de-initialization */ 192#endif 193 194static int init_done = 0; 195 196public int auto_wrap; /* Terminal does \r\n when write past margin */ 197public int ignaw; /* Terminal ignores \n immediately after wrap */ 198public int erase_char; /* The user's erase char */ 199public int erase2_char; /* The user's other erase char */ 200public int kill_char; /* The user's line-kill char */ 201public int werase_char; /* The user's word-erase char */ 202public int sc_width, sc_height; /* Height & width of screen */ 203public int bo_s_width, bo_e_width; /* Printing width of boldface seq */ 204public int ul_s_width, ul_e_width; /* Printing width of underline seq */ 205public int so_s_width, so_e_width; /* Printing width of standout seq */ 206public int bl_s_width, bl_e_width; /* Printing width of blink seq */ 207public int above_mem, below_mem; /* Memory retained above/below screen */ 208public int can_goto_line; /* Can move cursor to any line */ 209public int clear_bg; /* Clear fills with background color */ 210public int missing_cap = 0; /* Some capability is missing */ 211public char *kent = NULL; /* Keypad ENTER sequence */ 212 213static int attrmode = AT_NORMAL; 214extern int binattr; 215extern int line_count; 216 217#if !MSDOS_COMPILER 218static char *cheaper(); 219static void tmodes(); 220#endif 221 222/* 223 * These two variables are sometimes defined in, 224 * and needed by, the termcap library. 225 */ 226#if MUST_DEFINE_OSPEED 227extern short ospeed; /* Terminal output baud rate */ 228extern char PC; /* Pad character */ 229#endif 230#ifdef _OSK 231short ospeed; 232char PC_, *UP, *BC; 233#endif 234 235extern int quiet; /* If VERY_QUIET, use visual bell for bell */ 236extern int no_back_scroll; 237extern int swindow; 238extern int no_init; 239extern int no_keypad; 240extern int sigs; 241extern int wscroll; 242extern int screen_trashed; 243extern int tty; 244extern int top_scroll; 245extern int quit_if_one_screen; 246extern int oldbot; 247#if HILITE_SEARCH 248extern int hilite_search; 249#endif 250 251extern char *tgetstr(); 252extern char *tgoto(); 253 254 255/* 256 * Change terminal to "raw mode", or restore to "normal" mode. 257 * "Raw mode" means 258 * 1. An outstanding read will complete on receipt of a single keystroke. 259 * 2. Input is not echoed. 260 * 3. On output, \n is mapped to \r\n. 261 * 4. \t is NOT expanded into spaces. 262 * 5. Signal-causing characters such as ctrl-C (interrupt), 263 * etc. are NOT disabled. 264 * It doesn't matter whether an input \n is mapped to \r, or vice versa. 265 */ 266 public void 267raw_mode(on) 268 int on; 269{ 270 static int curr_on = 0; 271 272 if (on == curr_on) 273 return; 274 erase2_char = '\b'; /* in case OS doesn't know about erase2 */ 275#if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS 276 { 277 struct termios s; 278 static struct termios save_term; 279 static int saved_term = 0; 280 281 if (on) 282 { 283 /* 284 * Get terminal modes. 285 */ 286 tcgetattr(tty, &s); 287 288 /* 289 * Save modes and set certain variables dependent on modes. 290 */ 291 if (!saved_term) 292 { 293 save_term = s; 294 saved_term = 1; 295 } 296#if HAVE_OSPEED 297 switch (cfgetospeed(&s)) 298 { 299#ifdef B0 300 case B0: ospeed = 0; break; 301#endif 302#ifdef B50 303 case B50: ospeed = 1; break; 304#endif 305#ifdef B75 306 case B75: ospeed = 2; break; 307#endif 308#ifdef B110 309 case B110: ospeed = 3; break; 310#endif 311#ifdef B134 312 case B134: ospeed = 4; break; 313#endif 314#ifdef B150 315 case B150: ospeed = 5; break; 316#endif 317#ifdef B200 318 case B200: ospeed = 6; break; 319#endif 320#ifdef B300 321 case B300: ospeed = 7; break; 322#endif 323#ifdef B600 324 case B600: ospeed = 8; break; 325#endif 326#ifdef B1200 327 case B1200: ospeed = 9; break; 328#endif 329#ifdef B1800 330 case B1800: ospeed = 10; break; 331#endif 332#ifdef B2400 333 case B2400: ospeed = 11; break; 334#endif 335#ifdef B4800 336 case B4800: ospeed = 12; break; 337#endif 338#ifdef B9600 339 case B9600: ospeed = 13; break; 340#endif 341#ifdef EXTA 342 case EXTA: ospeed = 14; break; 343#endif 344#ifdef EXTB 345 case EXTB: ospeed = 15; break; 346#endif 347#ifdef B57600 348 case B57600: ospeed = 16; break; 349#endif 350#ifdef B115200 351 case B115200: ospeed = 17; break; 352#endif 353 default: ; 354 } 355#endif 356 erase_char = s.c_cc[VERASE]; 357#ifdef VERASE2 358 erase2_char = s.c_cc[VERASE2]; 359#endif 360 kill_char = s.c_cc[VKILL]; 361#ifdef VWERASE 362 werase_char = s.c_cc[VWERASE]; 363#else 364 werase_char = CONTROL('W'); 365#endif 366 367 /* 368 * Set the modes to the way we want them. 369 */ 370 s.c_lflag &= ~(0 371#ifdef ICANON 372 | ICANON 373#endif 374#ifdef ECHO 375 | ECHO 376#endif 377#ifdef ECHOE 378 | ECHOE 379#endif 380#ifdef ECHOK 381 | ECHOK 382#endif 383#if ECHONL 384 | ECHONL 385#endif 386 ); 387 388 s.c_oflag |= (0 389#ifdef OXTABS 390 | OXTABS 391#else 392#ifdef TAB3 393 | TAB3 394#else 395#ifdef XTABS 396 | XTABS 397#endif 398#endif 399#endif 400#ifdef OPOST 401 | OPOST 402#endif 403#ifdef ONLCR 404 | ONLCR 405#endif 406 ); 407 408 s.c_oflag &= ~(0 409#ifdef ONOEOT 410 | ONOEOT 411#endif 412#ifdef OCRNL 413 | OCRNL 414#endif 415#ifdef ONOCR 416 | ONOCR 417#endif 418#ifdef ONLRET 419 | ONLRET 420#endif 421 ); 422 s.c_cc[VMIN] = 1; 423 s.c_cc[VTIME] = 0; 424#ifdef VLNEXT 425 s.c_cc[VLNEXT] = 0; 426#endif 427#ifdef VDSUSP 428 s.c_cc[VDSUSP] = 0; 429#endif 430#if MUST_SET_LINE_DISCIPLINE 431 /* 432 * System's termios is broken; need to explicitly 433 * request TERMIODISC line discipline. 434 */ 435 s.c_line = TERMIODISC; 436#endif 437 } else 438 { 439 /* 440 * Restore saved modes. 441 */ 442 s = save_term; 443 } 444#if HAVE_FSYNC 445 fsync(tty); 446#endif 447 tcsetattr(tty, TCSADRAIN, &s); 448#if MUST_SET_LINE_DISCIPLINE 449 if (!on) 450 { 451 /* 452 * Broken termios *ignores* any line discipline 453 * except TERMIODISC. A different old line discipline 454 * is therefore not restored, yet. Restore the old 455 * line discipline by hand. 456 */ 457 ioctl(tty, TIOCSETD, &save_term.c_line); 458 } 459#endif 460 } 461#else 462#ifdef TCGETA 463 { 464 struct termio s; 465 static struct termio save_term; 466 static int saved_term = 0; 467 468 if (on) 469 { 470 /* 471 * Get terminal modes. 472 */ 473 ioctl(tty, TCGETA, &s); 474 475 /* 476 * Save modes and set certain variables dependent on modes. 477 */ 478 if (!saved_term) 479 { 480 save_term = s; 481 saved_term = 1; 482 } 483#if HAVE_OSPEED 484 ospeed = s.c_cflag & CBAUD; 485#endif 486 erase_char = s.c_cc[VERASE]; 487 kill_char = s.c_cc[VKILL]; 488#ifdef VWERASE 489 werase_char = s.c_cc[VWERASE]; 490#else 491 werase_char = CONTROL('W'); 492#endif 493 494 /* 495 * Set the modes to the way we want them. 496 */ 497 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); 498 s.c_oflag |= (OPOST|ONLCR|TAB3); 499 s.c_oflag &= ~(OCRNL|ONOCR|ONLRET); 500 s.c_cc[VMIN] = 1; 501 s.c_cc[VTIME] = 0; 502 } else 503 { 504 /* 505 * Restore saved modes. 506 */ 507 s = save_term; 508 } 509 ioctl(tty, TCSETAW, &s); 510 } 511#else 512#ifdef TIOCGETP 513 { 514 struct sgttyb s; 515 static struct sgttyb save_term; 516 static int saved_term = 0; 517 518 if (on) 519 { 520 /* 521 * Get terminal modes. 522 */ 523 ioctl(tty, TIOCGETP, &s); 524 525 /* 526 * Save modes and set certain variables dependent on modes. 527 */ 528 if (!saved_term) 529 { 530 save_term = s; 531 saved_term = 1; 532 } 533#if HAVE_OSPEED 534 ospeed = s.sg_ospeed; 535#endif 536 erase_char = s.sg_erase; 537 kill_char = s.sg_kill; 538 werase_char = CONTROL('W'); 539 540 /* 541 * Set the modes to the way we want them. 542 */ 543 s.sg_flags |= CBREAK; 544 s.sg_flags &= ~(ECHO|XTABS); 545 } else 546 { 547 /* 548 * Restore saved modes. 549 */ 550 s = save_term; 551 } 552 ioctl(tty, TIOCSETN, &s); 553 } 554#else 555#ifdef _OSK 556 { 557 struct sgbuf s; 558 static struct sgbuf save_term; 559 static int saved_term = 0; 560 561 if (on) 562 { 563 /* 564 * Get terminal modes. 565 */ 566 _gs_opt(tty, &s); 567 568 /* 569 * Save modes and set certain variables dependent on modes. 570 */ 571 if (!saved_term) 572 { 573 save_term = s; 574 saved_term = 1; 575 } 576 erase_char = s.sg_bspch; 577 kill_char = s.sg_dlnch; 578 werase_char = CONTROL('W'); 579 580 /* 581 * Set the modes to the way we want them. 582 */ 583 s.sg_echo = 0; 584 s.sg_eofch = 0; 585 s.sg_pause = 0; 586 s.sg_psch = 0; 587 } else 588 { 589 /* 590 * Restore saved modes. 591 */ 592 s = save_term; 593 } 594 _ss_opt(tty, &s); 595 } 596#else 597 /* MS-DOS, Windows, or OS2 */ 598#if OS2 599 /* OS2 */ 600 LSIGNAL(SIGINT, SIG_IGN); 601#endif 602 erase_char = '\b'; 603#if MSDOS_COMPILER==DJGPPC 604 kill_char = CONTROL('U'); 605 /* 606 * So that when we shell out or run another program, its 607 * stdin is in cooked mode. We do not switch stdin to binary 608 * mode if fd0 is zero, since that means we were called before 609 * tty was reopened in open_getchr, in which case we would be 610 * changing the original stdin device outside less. 611 */ 612 if (fd0 != 0) 613 setmode(0, on ? O_BINARY : O_TEXT); 614#else 615 kill_char = ESC; 616#endif 617 werase_char = CONTROL('W'); 618#endif 619#endif 620#endif 621#endif 622 curr_on = on; 623} 624 625#if !MSDOS_COMPILER 626/* 627 * Some glue to prevent calling termcap functions if tgetent() failed. 628 */ 629static int hardcopy; 630 631 static char * 632ltget_env(capname) 633 char *capname; 634{ 635 char name[16]; 636 char *s; 637 638 s = lgetenv("LESS_TERMCAP_DEBUG"); 639 if (s != NULL && *s != '\0') 640 { 641 struct env { struct env *next; char *name; char *value; }; 642 static struct env *envs = NULL; 643 struct env *p; 644 for (p = envs; p != NULL; p = p->next) 645 if (strcmp(p->name, capname) == 0) 646 return p->value; 647 p = (struct env *) ecalloc(1, sizeof(struct env)); 648 p->name = save(capname); 649 p->value = (char *) ecalloc(strlen(capname)+3, sizeof(char)); 650 sprintf(p->value, "<%s>", capname); 651 p->next = envs; 652 envs = p; 653 return p->value; 654 } 655 strcpy(name, "LESS_TERMCAP_"); 656 strcat(name, capname); 657 return (lgetenv(name)); 658} 659 660 static int 661ltgetflag(capname) 662 char *capname; 663{ 664 char *s; 665 666 if ((s = ltget_env(capname)) != NULL) 667 return (*s != '\0' && *s != '0'); 668 if (hardcopy) 669 return (0); 670 return (tgetflag(capname)); 671} 672 673 static int 674ltgetnum(capname) 675 char *capname; 676{ 677 char *s; 678 679 if ((s = ltget_env(capname)) != NULL) 680 return (atoi(s)); 681 if (hardcopy) 682 return (-1); 683 return (tgetnum(capname)); 684} 685 686 static char * 687ltgetstr(capname, pp) 688 char *capname; 689 char **pp; 690{ 691 char *s; 692 693 if ((s = ltget_env(capname)) != NULL) 694 return (s); 695 if (hardcopy) 696 return (NULL); 697 return (tgetstr(capname, pp)); 698} 699#endif /* MSDOS_COMPILER */ 700 701/* 702 * Get size of the output screen. 703 */ 704 public void 705scrsize() 706{ 707 char *s; 708 int sys_height; 709 int sys_width; 710#if !MSDOS_COMPILER 711 int n; 712#endif 713 714#define DEF_SC_WIDTH 80 715#if MSDOS_COMPILER 716#define DEF_SC_HEIGHT 25 717#else 718#define DEF_SC_HEIGHT 24 719#endif 720 721 722 sys_width = sys_height = 0; 723 724#if MSDOS_COMPILER==MSOFTC 725 { 726 struct videoconfig w; 727 _getvideoconfig(&w); 728 sys_height = w.numtextrows; 729 sys_width = w.numtextcols; 730 } 731#else 732#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 733 { 734 struct text_info w; 735 gettextinfo(&w); 736 sys_height = w.screenheight; 737 sys_width = w.screenwidth; 738 } 739#else 740#if MSDOS_COMPILER==WIN32C 741 { 742 CONSOLE_SCREEN_BUFFER_INFO scr; 743 GetConsoleScreenBufferInfo(con_out, &scr); 744 sys_height = scr.srWindow.Bottom - scr.srWindow.Top + 1; 745 sys_width = scr.srWindow.Right - scr.srWindow.Left + 1; 746 } 747#else 748#if OS2 749 { 750 int s[2]; 751 _scrsize(s); 752 sys_width = s[0]; 753 sys_height = s[1]; 754 /* 755 * When using terminal emulators for XFree86/OS2, the 756 * _scrsize function does not work well. 757 * Call the scrsize.exe program to get the window size. 758 */ 759 windowid = getenv("WINDOWID"); 760 if (windowid != NULL) 761 { 762 FILE *fd = popen("scrsize", "rt"); 763 if (fd != NULL) 764 { 765 int w, h; 766 fscanf(fd, "%i %i", &w, &h); 767 if (w > 0 && h > 0) 768 { 769 sys_width = w; 770 sys_height = h; 771 } 772 pclose(fd); 773 } 774 } 775 } 776#else 777#ifdef TIOCGWINSZ 778 { 779 struct winsize w; 780 if (ioctl(2, TIOCGWINSZ, &w) == 0) 781 { 782 if (w.ws_row > 0) 783 sys_height = w.ws_row; 784 if (w.ws_col > 0) 785 sys_width = w.ws_col; 786 } 787 } 788#else 789#ifdef WIOCGETD 790 { 791 struct uwdata w; 792 if (ioctl(2, WIOCGETD, &w) == 0) 793 { 794 if (w.uw_height > 0) 795 sys_height = w.uw_height / w.uw_vs; 796 if (w.uw_width > 0) 797 sys_width = w.uw_width / w.uw_hs; 798 } 799 } 800#endif 801#endif 802#endif 803#endif 804#endif 805#endif 806 807 if (sys_height > 0) 808 sc_height = sys_height; 809 else if ((s = lgetenv("LINES")) != NULL) 810 sc_height = atoi(s); 811#if !MSDOS_COMPILER 812 else if ((n = ltgetnum("li")) > 0) 813 sc_height = n; 814#endif 815 if (sc_height <= 0) 816 sc_height = DEF_SC_HEIGHT; 817 818 if (sys_width > 0) 819 sc_width = sys_width; 820 else if ((s = lgetenv("COLUMNS")) != NULL) 821 sc_width = atoi(s); 822#if !MSDOS_COMPILER 823 else if ((n = ltgetnum("co")) > 0) 824 sc_width = n; 825#endif 826 if (sc_width <= 0) 827 sc_width = DEF_SC_WIDTH; 828} 829 830#if MSDOS_COMPILER==MSOFTC 831/* 832 * Figure out how many empty loops it takes to delay a millisecond. 833 */ 834 static void 835get_clock() 836{ 837 clock_t start; 838 839 /* 840 * Get synchronized at the start of a tick. 841 */ 842 start = clock(); 843 while (clock() == start) 844 ; 845 /* 846 * Now count loops till the next tick. 847 */ 848 start = clock(); 849 msec_loops = 0; 850 while (clock() == start) 851 msec_loops++; 852 /* 853 * Convert from (loops per clock) to (loops per millisecond). 854 */ 855 msec_loops *= CLOCKS_PER_SEC; 856 msec_loops /= 1000; 857} 858 859/* 860 * Delay for a specified number of milliseconds. 861 */ 862 static void 863dummy_func() 864{ 865 static long delay_dummy = 0; 866 delay_dummy++; 867} 868 869 static void 870delay(msec) 871 int msec; 872{ 873 long i; 874 875 while (msec-- > 0) 876 { 877 for (i = 0; i < msec_loops; i++) 878 { 879 /* 880 * Make it look like we're doing something here, 881 * so the optimizer doesn't remove the whole loop. 882 */ 883 dummy_func(); 884 } 885 } 886} 887#endif 888 889/* 890 * Return the characters actually input by a "special" key. 891 */ 892 public char * 893special_key_str(key) 894 int key; 895{ 896 static char tbuf[40]; 897 char *s; 898#if MSDOS_COMPILER || OS2 899 static char k_right[] = { '\340', PCK_RIGHT, 0 }; 900 static char k_left[] = { '\340', PCK_LEFT, 0 }; 901 static char k_ctl_right[] = { '\340', PCK_CTL_RIGHT, 0 }; 902 static char k_ctl_left[] = { '\340', PCK_CTL_LEFT, 0 }; 903 static char k_insert[] = { '\340', PCK_INSERT, 0 }; 904 static char k_delete[] = { '\340', PCK_DELETE, 0 }; 905 static char k_ctl_delete[] = { '\340', PCK_CTL_DELETE, 0 }; 906 static char k_ctl_backspace[] = { '\177', 0 }; 907 static char k_home[] = { '\340', PCK_HOME, 0 }; 908 static char k_end[] = { '\340', PCK_END, 0 }; 909 static char k_up[] = { '\340', PCK_UP, 0 }; 910 static char k_down[] = { '\340', PCK_DOWN, 0 }; 911 static char k_backtab[] = { '\340', PCK_SHIFT_TAB, 0 }; 912 static char k_pagedown[] = { '\340', PCK_PAGEDOWN, 0 }; 913 static char k_pageup[] = { '\340', PCK_PAGEUP, 0 }; 914 static char k_f1[] = { '\340', PCK_F1, 0 }; 915#endif 916#if !MSDOS_COMPILER 917 char *sp = tbuf; 918#endif 919 920 switch (key) 921 { 922#if OS2 923 /* 924 * If windowid is not NULL, assume less is executed in 925 * the XFree86 environment. 926 */ 927 case SK_RIGHT_ARROW: 928 s = windowid ? ltgetstr("kr", &sp) : k_right; 929 break; 930 case SK_LEFT_ARROW: 931 s = windowid ? ltgetstr("kl", &sp) : k_left; 932 break; 933 case SK_UP_ARROW: 934 s = windowid ? ltgetstr("ku", &sp) : k_up; 935 break; 936 case SK_DOWN_ARROW: 937 s = windowid ? ltgetstr("kd", &sp) : k_down; 938 break; 939 case SK_PAGE_UP: 940 s = windowid ? ltgetstr("kP", &sp) : k_pageup; 941 break; 942 case SK_PAGE_DOWN: 943 s = windowid ? ltgetstr("kN", &sp) : k_pagedown; 944 break; 945 case SK_HOME: 946 s = windowid ? ltgetstr("kh", &sp) : k_home; 947 break; 948 case SK_END: 949 s = windowid ? ltgetstr("@7", &sp) : k_end; 950 break; 951 case SK_DELETE: 952 if (windowid) 953 { 954 s = ltgetstr("kD", &sp); 955 if (s == NULL) 956 { 957 tbuf[0] = '\177'; 958 tbuf[1] = '\0'; 959 s = tbuf; 960 } 961 } else 962 s = k_delete; 963 break; 964#endif 965#if MSDOS_COMPILER 966 case SK_RIGHT_ARROW: 967 s = k_right; 968 break; 969 case SK_LEFT_ARROW: 970 s = k_left; 971 break; 972 case SK_UP_ARROW: 973 s = k_up; 974 break; 975 case SK_DOWN_ARROW: 976 s = k_down; 977 break; 978 case SK_PAGE_UP: 979 s = k_pageup; 980 break; 981 case SK_PAGE_DOWN: 982 s = k_pagedown; 983 break; 984 case SK_HOME: 985 s = k_home; 986 break; 987 case SK_END: 988 s = k_end; 989 break; 990 case SK_DELETE: 991 s = k_delete; 992 break; 993#endif 994#if MSDOS_COMPILER || OS2 995 case SK_INSERT: 996 s = k_insert; 997 break; 998 case SK_CTL_LEFT_ARROW: 999 s = k_ctl_left; 1000 break; 1001 case SK_CTL_RIGHT_ARROW: 1002 s = k_ctl_right; 1003 break; 1004 case SK_CTL_BACKSPACE: 1005 s = k_ctl_backspace; 1006 break; 1007 case SK_CTL_DELETE: 1008 s = k_ctl_delete; 1009 break; 1010 case SK_F1: 1011 s = k_f1; 1012 break; 1013 case SK_BACKTAB: 1014 s = k_backtab; 1015 break; 1016#else 1017 case SK_RIGHT_ARROW: 1018 s = ltgetstr("kr", &sp); 1019 break; 1020 case SK_LEFT_ARROW: 1021 s = ltgetstr("kl", &sp); 1022 break; 1023 case SK_UP_ARROW: 1024 s = ltgetstr("ku", &sp); 1025 break; 1026 case SK_DOWN_ARROW: 1027 s = ltgetstr("kd", &sp); 1028 break; 1029 case SK_PAGE_UP: 1030 s = ltgetstr("kP", &sp); 1031 break; 1032 case SK_PAGE_DOWN: 1033 s = ltgetstr("kN", &sp); 1034 break; 1035 case SK_HOME: 1036 s = ltgetstr("kh", &sp); 1037 break; 1038 case SK_END: 1039 s = ltgetstr("@7", &sp); 1040 break; 1041 case SK_DELETE: 1042 s = ltgetstr("kD", &sp); 1043 if (s == NULL) 1044 { 1045 tbuf[0] = '\177'; 1046 tbuf[1] = '\0'; 1047 s = tbuf; 1048 } 1049 break; 1050#endif 1051 case SK_CONTROL_K: 1052 tbuf[0] = CONTROL('K'); 1053 tbuf[1] = '\0'; 1054 s = tbuf; 1055 break; 1056 default: 1057 return (NULL); 1058 } 1059 return (s); 1060} 1061 1062/* 1063 * Get terminal capabilities via termcap. 1064 */ 1065 public void 1066get_term() 1067{ 1068#if MSDOS_COMPILER 1069 auto_wrap = 1; 1070 ignaw = 0; 1071 can_goto_line = 1; 1072 clear_bg = 1; 1073 /* 1074 * Set up default colors. 1075 * The xx_s_width and xx_e_width vars are already initialized to 0. 1076 */ 1077#if MSDOS_COMPILER==MSOFTC 1078 sy_bg_color = _getbkcolor(); 1079 sy_fg_color = _gettextcolor(); 1080 get_clock(); 1081#else 1082#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 1083 { 1084 struct text_info w; 1085 gettextinfo(&w); 1086 sy_bg_color = (w.attribute >> 4) & 0x0F; 1087 sy_fg_color = (w.attribute >> 0) & 0x0F; 1088 } 1089#else 1090#if MSDOS_COMPILER==WIN32C 1091 { 1092 DWORD nread; 1093 CONSOLE_SCREEN_BUFFER_INFO scr; 1094 1095 con_out_save = con_out = GetStdHandle(STD_OUTPUT_HANDLE); 1096 /* 1097 * Always open stdin in binary. Note this *must* be done 1098 * before any file operations have been done on fd0. 1099 */ 1100 SET_BINARY(0); 1101 GetConsoleScreenBufferInfo(con_out, &scr); 1102 ReadConsoleOutputAttribute(con_out, &curr_attr, 1103 1, scr.dwCursorPosition, &nread); 1104 sy_bg_color = (curr_attr & BG_COLORS) >> 4; /* normalize */ 1105 sy_fg_color = curr_attr & FG_COLORS; 1106 } 1107#endif 1108#endif 1109#endif 1110 nm_fg_color = sy_fg_color; 1111 nm_bg_color = sy_bg_color; 1112 bo_fg_color = 11; 1113 bo_bg_color = 0; 1114 ul_fg_color = 9; 1115 ul_bg_color = 0; 1116 so_fg_color = 15; 1117 so_bg_color = 9; 1118 bl_fg_color = 15; 1119 bl_bg_color = 0; 1120 sgr_mode = 0; 1121 1122 /* 1123 * Get size of the screen. 1124 */ 1125 scrsize(); 1126 pos_init(); 1127 1128 1129#else /* !MSDOS_COMPILER */ 1130 1131 char *sp; 1132 char *t1, *t2; 1133 char *term; 1134 char termbuf[TERMBUF_SIZE]; 1135 1136 static char sbuf[TERMSBUF_SIZE]; 1137 1138#if OS2 1139 /* 1140 * Make sure the termcap database is available. 1141 */ 1142 sp = lgetenv("TERMCAP"); 1143 if (sp == NULL || *sp == '\0') 1144 { 1145 char *termcap; 1146 if ((sp = homefile("termcap.dat")) != NULL) 1147 { 1148 termcap = (char *) ecalloc(strlen(sp)+9, sizeof(char)); 1149 sprintf(termcap, "TERMCAP=%s", sp); 1150 free(sp); 1151 putenv(termcap); 1152 } 1153 } 1154#endif 1155 /* 1156 * Find out what kind of terminal this is. 1157 */ 1158 if ((term = lgetenv("TERM")) == NULL) 1159 term = DEFAULT_TERM; 1160 hardcopy = 0; 1161 if (tgetent(termbuf, term) != TGETENT_OK) 1162 hardcopy = 1; 1163 if (ltgetflag("hc")) 1164 hardcopy = 1; 1165 1166 /* 1167 * Get size of the screen. 1168 */ 1169 scrsize(); 1170 pos_init(); 1171 1172 auto_wrap = ltgetflag("am"); 1173 ignaw = ltgetflag("xn"); 1174 above_mem = ltgetflag("da"); 1175 below_mem = ltgetflag("db"); 1176 clear_bg = ltgetflag("ut"); 1177 1178 /* 1179 * Assumes termcap variable "sg" is the printing width of: 1180 * the standout sequence, the end standout sequence, 1181 * the underline sequence, the end underline sequence, 1182 * the boldface sequence, and the end boldface sequence. 1183 */ 1184 if ((so_s_width = ltgetnum("sg")) < 0) 1185 so_s_width = 0; 1186 so_e_width = so_s_width; 1187 1188 bo_s_width = bo_e_width = so_s_width; 1189 ul_s_width = ul_e_width = so_s_width; 1190 bl_s_width = bl_e_width = so_s_width; 1191 1192#if HILITE_SEARCH 1193 if (so_s_width > 0 || so_e_width > 0) 1194 /* 1195 * Disable highlighting by default on magic cookie terminals. 1196 * Turning on highlighting might change the displayed width 1197 * of a line, causing the display to get messed up. 1198 * The user can turn it back on with -g, 1199 * but she won't like the results. 1200 */ 1201 hilite_search = 0; 1202#endif 1203 1204 /* 1205 * Get various string-valued capabilities. 1206 */ 1207 sp = sbuf; 1208 1209#if HAVE_OSPEED 1210 sc_pad = ltgetstr("pc", &sp); 1211 if (sc_pad != NULL) 1212 PC = *sc_pad; 1213#endif 1214 1215 sc_s_keypad = ltgetstr("ks", &sp); 1216 if (sc_s_keypad == NULL) 1217 sc_s_keypad = ""; 1218 sc_e_keypad = ltgetstr("ke", &sp); 1219 if (sc_e_keypad == NULL) 1220 sc_e_keypad = ""; 1221 kent = ltgetstr("@8", &sp); 1222 1223 sc_init = ltgetstr("ti", &sp); 1224 if (sc_init == NULL) 1225 sc_init = ""; 1226 1227 sc_deinit= ltgetstr("te", &sp); 1228 if (sc_deinit == NULL) 1229 sc_deinit = ""; 1230 1231 sc_eol_clear = ltgetstr("ce", &sp); 1232 if (sc_eol_clear == NULL || *sc_eol_clear == '\0') 1233 { 1234 missing_cap = 1; 1235 sc_eol_clear = ""; 1236 } 1237 1238 sc_eos_clear = ltgetstr("cd", &sp); 1239 if (below_mem && (sc_eos_clear == NULL || *sc_eos_clear == '\0')) 1240 { 1241 missing_cap = 1; 1242 sc_eos_clear = ""; 1243 } 1244 1245 sc_clear = ltgetstr("cl", &sp); 1246 if (sc_clear == NULL || *sc_clear == '\0') 1247 { 1248 missing_cap = 1; 1249 sc_clear = "\n\n"; 1250 } 1251 1252 sc_move = ltgetstr("cm", &sp); 1253 if (sc_move == NULL || *sc_move == '\0') 1254 { 1255 /* 1256 * This is not an error here, because we don't 1257 * always need sc_move. 1258 * We need it only if we don't have home or lower-left. 1259 */ 1260 sc_move = ""; 1261 can_goto_line = 0; 1262 } else 1263 can_goto_line = 1; 1264 1265 tmodes("so", "se", &sc_s_in, &sc_s_out, "", "", &sp); 1266 tmodes("us", "ue", &sc_u_in, &sc_u_out, sc_s_in, sc_s_out, &sp); 1267 tmodes("md", "me", &sc_b_in, &sc_b_out, sc_s_in, sc_s_out, &sp); 1268 tmodes("mb", "me", &sc_bl_in, &sc_bl_out, sc_s_in, sc_s_out, &sp); 1269 1270 sc_visual_bell = ltgetstr("vb", &sp); 1271 if (sc_visual_bell == NULL) 1272 sc_visual_bell = ""; 1273 1274 if (ltgetflag("bs")) 1275 sc_backspace = "\b"; 1276 else 1277 { 1278 sc_backspace = ltgetstr("bc", &sp); 1279 if (sc_backspace == NULL || *sc_backspace == '\0') 1280 sc_backspace = "\b"; 1281 } 1282 1283 /* 1284 * Choose between using "ho" and "cm" ("home" and "cursor move") 1285 * to move the cursor to the upper left corner of the screen. 1286 */ 1287 t1 = ltgetstr("ho", &sp); 1288 if (t1 == NULL) 1289 t1 = ""; 1290 if (*sc_move == '\0') 1291 t2 = ""; 1292 else 1293 { 1294 strcpy(sp, tgoto(sc_move, 0, 0)); 1295 t2 = sp; 1296 sp += strlen(sp) + 1; 1297 } 1298 sc_home = cheaper(t1, t2, "|\b^"); 1299 1300 /* 1301 * Choose between using "ll" and "cm" ("lower left" and "cursor move") 1302 * to move the cursor to the lower left corner of the screen. 1303 */ 1304 t1 = ltgetstr("ll", &sp); 1305 if (t1 == NULL) 1306 t1 = ""; 1307 if (*sc_move == '\0') 1308 t2 = ""; 1309 else 1310 { 1311 strcpy(sp, tgoto(sc_move, 0, sc_height-1)); 1312 t2 = sp; 1313 sp += strlen(sp) + 1; 1314 } 1315 sc_lower_left = cheaper(t1, t2, "\r"); 1316 1317 /* 1318 * Get carriage return string. 1319 */ 1320 sc_return = ltgetstr("cr", &sp); 1321 if (sc_return == NULL) 1322 sc_return = "\r"; 1323 1324 /* 1325 * Choose between using "al" or "sr" ("add line" or "scroll reverse") 1326 * to add a line at the top of the screen. 1327 */ 1328 t1 = ltgetstr("al", &sp); 1329 if (t1 == NULL) 1330 t1 = ""; 1331 t2 = ltgetstr("sr", &sp); 1332 if (t2 == NULL) 1333 t2 = ""; 1334#if OS2 1335 if (*t1 == '\0' && *t2 == '\0') 1336 sc_addline = ""; 1337 else 1338#endif 1339 if (above_mem) 1340 sc_addline = t1; 1341 else 1342 sc_addline = cheaper(t1, t2, ""); 1343 if (*sc_addline == '\0') 1344 { 1345 /* 1346 * Force repaint on any backward movement. 1347 */ 1348 no_back_scroll = 1; 1349 } 1350#endif /* MSDOS_COMPILER */ 1351} 1352 1353#if !MSDOS_COMPILER 1354/* 1355 * Return the cost of displaying a termcap string. 1356 * We use the trick of calling tputs, but as a char printing function 1357 * we give it inc_costcount, which just increments "costcount". 1358 * This tells us how many chars would be printed by using this string. 1359 * {{ Couldn't we just use strlen? }} 1360 */ 1361static int costcount; 1362 1363/*ARGSUSED*/ 1364 static int 1365inc_costcount(c) 1366 int c; 1367{ 1368 costcount++; 1369 return (c); 1370} 1371 1372 static int 1373cost(t) 1374 char *t; 1375{ 1376 costcount = 0; 1377 tputs(t, sc_height, inc_costcount); 1378 return (costcount); 1379} 1380 1381/* 1382 * Return the "best" of the two given termcap strings. 1383 * The best, if both exist, is the one with the lower 1384 * cost (see cost() function). 1385 */ 1386 static char * 1387cheaper(t1, t2, def) 1388 char *t1, *t2; 1389 char *def; 1390{ 1391 if (*t1 == '\0' && *t2 == '\0') 1392 { 1393 missing_cap = 1; 1394 return (def); 1395 } 1396 if (*t1 == '\0') 1397 return (t2); 1398 if (*t2 == '\0') 1399 return (t1); 1400 if (cost(t1) < cost(t2)) 1401 return (t1); 1402 return (t2); 1403} 1404 1405 static void 1406tmodes(incap, outcap, instr, outstr, def_instr, def_outstr, spp) 1407 char *incap; 1408 char *outcap; 1409 char **instr; 1410 char **outstr; 1411 char *def_instr; 1412 char *def_outstr; 1413 char **spp; 1414{ 1415 *instr = ltgetstr(incap, spp); 1416 if (*instr == NULL) 1417 { 1418 /* Use defaults. */ 1419 *instr = def_instr; 1420 *outstr = def_outstr; 1421 return; 1422 } 1423 1424 *outstr = ltgetstr(outcap, spp); 1425 if (*outstr == NULL) 1426 /* No specific out capability; use "me". */ 1427 *outstr = ltgetstr("me", spp); 1428 if (*outstr == NULL) 1429 /* Don't even have "me"; use a null string. */ 1430 *outstr = ""; 1431} 1432 1433#endif /* MSDOS_COMPILER */ 1434 1435 1436/* 1437 * Below are the functions which perform all the 1438 * terminal-specific screen manipulation. 1439 */ 1440 1441 1442#if MSDOS_COMPILER 1443 1444#if MSDOS_COMPILER==WIN32C 1445 static void 1446_settextposition(int row, int col) 1447{ 1448 COORD cpos; 1449 CONSOLE_SCREEN_BUFFER_INFO csbi; 1450 1451 GetConsoleScreenBufferInfo(con_out, &csbi); 1452 cpos.X = csbi.srWindow.Left + (col - 1); 1453 cpos.Y = csbi.srWindow.Top + (row - 1); 1454 SetConsoleCursorPosition(con_out, cpos); 1455} 1456#endif 1457 1458/* 1459 * Initialize the screen to the correct color at startup. 1460 */ 1461 static void 1462initcolor() 1463{ 1464#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 1465 intensevideo(); 1466#endif 1467 SETCOLORS(nm_fg_color, nm_bg_color); 1468#if 0 1469 /* 1470 * This clears the screen at startup. This is different from 1471 * the behavior of other versions of less. Disable it for now. 1472 */ 1473 char *blanks; 1474 int row; 1475 int col; 1476 1477 /* 1478 * Create a complete, blank screen using "normal" colors. 1479 */ 1480 SETCOLORS(nm_fg_color, nm_bg_color); 1481 blanks = (char *) ecalloc(width+1, sizeof(char)); 1482 for (col = 0; col < sc_width; col++) 1483 blanks[col] = ' '; 1484 blanks[sc_width] = '\0'; 1485 for (row = 0; row < sc_height; row++) 1486 _outtext(blanks); 1487 free(blanks); 1488#endif 1489} 1490#endif 1491 1492#if MSDOS_COMPILER==WIN32C 1493 1494/* 1495 * Termcap-like init with a private win32 console. 1496 */ 1497 static void 1498win32_init_term() 1499{ 1500 CONSOLE_SCREEN_BUFFER_INFO scr; 1501 COORD size; 1502 1503 if (con_out_save == INVALID_HANDLE_VALUE) 1504 return; 1505 1506 GetConsoleScreenBufferInfo(con_out_save, &scr); 1507 1508 if (con_out_ours == INVALID_HANDLE_VALUE) 1509 { 1510 DWORD output_mode; 1511 1512 /* 1513 * Create our own screen buffer, so that we 1514 * may restore the original when done. 1515 */ 1516 con_out_ours = CreateConsoleScreenBuffer( 1517 GENERIC_WRITE | GENERIC_READ, 1518 FILE_SHARE_WRITE | FILE_SHARE_READ, 1519 (LPSECURITY_ATTRIBUTES) NULL, 1520 CONSOLE_TEXTMODE_BUFFER, 1521 (LPVOID) NULL); 1522 /* 1523 * Enable underline, if available. 1524 */ 1525 GetConsoleMode(con_out_ours, &output_mode); 1526 have_ul = SetConsoleMode(con_out_ours, 1527 output_mode | ENABLE_VIRTUAL_TERMINAL_PROCESSING); 1528 } 1529 1530 size.X = scr.srWindow.Right - scr.srWindow.Left + 1; 1531 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1; 1532 SetConsoleScreenBufferSize(con_out_ours, size); 1533 SetConsoleActiveScreenBuffer(con_out_ours); 1534 con_out = con_out_ours; 1535} 1536 1537/* 1538 * Restore the startup console. 1539 */ 1540static void 1541win32_deinit_term() 1542{ 1543 if (con_out_save == INVALID_HANDLE_VALUE) 1544 return; 1545 if (quitting) 1546 (void) CloseHandle(con_out_ours); 1547 SetConsoleActiveScreenBuffer(con_out_save); 1548 con_out = con_out_save; 1549} 1550 1551#endif 1552 1553/* 1554 * Initialize terminal 1555 */ 1556 public void 1557init() 1558{ 1559#if !MSDOS_COMPILER 1560 if (quit_if_one_screen && line_count >= sc_height) 1561 quit_if_one_screen = FALSE; 1562 if (!no_init && !quit_if_one_screen) 1563 tputs(sc_init, sc_height, putchr); 1564 if (!no_keypad) 1565 tputs(sc_s_keypad, sc_height, putchr); 1566 if (top_scroll) 1567 { 1568 int i; 1569 1570 /* 1571 * This is nice to terminals with no alternate screen, 1572 * but with saved scrolled-off-the-top lines. This way, 1573 * no previous line is lost, but we start with a whole 1574 * screen to ourself. 1575 */ 1576 for (i = 1; i < sc_height; i++) 1577 putchr('\n'); 1578 } else 1579 line_left(); 1580#else 1581#if MSDOS_COMPILER==WIN32C 1582 if (!no_init) 1583 win32_init_term(); 1584#endif 1585 initcolor(); 1586 flush(); 1587#endif 1588 init_done = 1; 1589} 1590 1591/* 1592 * Deinitialize terminal 1593 */ 1594 public void 1595deinit() 1596{ 1597 if (!init_done) 1598 return; 1599#if !MSDOS_COMPILER 1600 if (!no_keypad) 1601 tputs(sc_e_keypad, sc_height, putchr); 1602 if (!no_init && !quit_if_one_screen) 1603 tputs(sc_deinit, sc_height, putchr); 1604#else 1605 /* Restore system colors. */ 1606 SETCOLORS(sy_fg_color, sy_bg_color); 1607#if MSDOS_COMPILER==WIN32C 1608 if (!no_init) 1609 win32_deinit_term(); 1610#else 1611 /* Need clreol to make SETCOLORS take effect. */ 1612 clreol(); 1613#endif 1614#endif 1615 init_done = 0; 1616} 1617 1618/* 1619 * Home cursor (move to upper left corner of screen). 1620 */ 1621 public void 1622home() 1623{ 1624#if !MSDOS_COMPILER 1625 tputs(sc_home, 1, putchr); 1626#else 1627 flush(); 1628 _settextposition(1,1); 1629#endif 1630} 1631 1632/* 1633 * Add a blank line (called with cursor at home). 1634 * Should scroll the display down. 1635 */ 1636 public void 1637add_line() 1638{ 1639#if !MSDOS_COMPILER 1640 tputs(sc_addline, sc_height, putchr); 1641#else 1642 flush(); 1643#if MSDOS_COMPILER==MSOFTC 1644 _scrolltextwindow(_GSCROLLDOWN); 1645 _settextposition(1,1); 1646#else 1647#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 1648 movetext(1,1, sc_width,sc_height-1, 1,2); 1649 gotoxy(1,1); 1650 clreol(); 1651#else 1652#if MSDOS_COMPILER==WIN32C 1653 { 1654 CHAR_INFO fillchar; 1655 SMALL_RECT rcSrc, rcClip; 1656 COORD new_org; 1657 CONSOLE_SCREEN_BUFFER_INFO csbi; 1658 1659 GetConsoleScreenBufferInfo(con_out,&csbi); 1660 1661 /* The clip rectangle is the entire visible screen. */ 1662 rcClip.Left = csbi.srWindow.Left; 1663 rcClip.Top = csbi.srWindow.Top; 1664 rcClip.Right = csbi.srWindow.Right; 1665 rcClip.Bottom = csbi.srWindow.Bottom; 1666 1667 /* The source rectangle is the visible screen minus the last line. */ 1668 rcSrc = rcClip; 1669 rcSrc.Bottom--; 1670 1671 /* Move the top left corner of the source window down one row. */ 1672 new_org.X = rcSrc.Left; 1673 new_org.Y = rcSrc.Top + 1; 1674 1675 /* Fill the right character and attributes. */ 1676 fillchar.Char.AsciiChar = ' '; 1677 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 1678 fillchar.Attributes = curr_attr; 1679 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); 1680 _settextposition(1,1); 1681 } 1682#endif 1683#endif 1684#endif 1685#endif 1686} 1687 1688#if 0 1689/* 1690 * Remove the n topmost lines and scroll everything below it in the 1691 * window upward. This is needed to stop leaking the topmost line 1692 * into the scrollback buffer when we go down-one-line (in WIN32). 1693 */ 1694 public void 1695remove_top(n) 1696 int n; 1697{ 1698#if MSDOS_COMPILER==WIN32C 1699 SMALL_RECT rcSrc, rcClip; 1700 CHAR_INFO fillchar; 1701 COORD new_org; 1702 CONSOLE_SCREEN_BUFFER_INFO csbi; /* to get buffer info */ 1703 1704 if (n >= sc_height - 1) 1705 { 1706 clear(); 1707 home(); 1708 return; 1709 } 1710 1711 flush(); 1712 1713 GetConsoleScreenBufferInfo(con_out, &csbi); 1714 1715 /* Get the extent of all-visible-rows-but-the-last. */ 1716 rcSrc.Left = csbi.srWindow.Left; 1717 rcSrc.Top = csbi.srWindow.Top + n; 1718 rcSrc.Right = csbi.srWindow.Right; 1719 rcSrc.Bottom = csbi.srWindow.Bottom; 1720 1721 /* Get the clip rectangle. */ 1722 rcClip.Left = rcSrc.Left; 1723 rcClip.Top = csbi.srWindow.Top; 1724 rcClip.Right = rcSrc.Right; 1725 rcClip.Bottom = rcSrc.Bottom ; 1726 1727 /* Move the source window up n rows. */ 1728 new_org.X = rcSrc.Left; 1729 new_org.Y = rcSrc.Top - n; 1730 1731 /* Fill the right character and attributes. */ 1732 fillchar.Char.AsciiChar = ' '; 1733 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 1734 fillchar.Attributes = curr_attr; 1735 1736 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); 1737 1738 /* Position cursor on first blank line. */ 1739 goto_line(sc_height - n - 1); 1740#endif 1741} 1742#endif 1743 1744#if MSDOS_COMPILER==WIN32C 1745/* 1746 * Clear the screen. 1747 */ 1748 static void 1749win32_clear() 1750{ 1751 /* 1752 * This will clear only the currently visible rows of the NT 1753 * console buffer, which means none of the precious scrollback 1754 * rows are touched making for faster scrolling. Note that, if 1755 * the window has fewer columns than the console buffer (i.e. 1756 * there is a horizontal scrollbar as well), the entire width 1757 * of the visible rows will be cleared. 1758 */ 1759 COORD topleft; 1760 DWORD nchars; 1761 DWORD winsz; 1762 CONSOLE_SCREEN_BUFFER_INFO csbi; 1763 1764 /* get the number of cells in the current buffer */ 1765 GetConsoleScreenBufferInfo(con_out, &csbi); 1766 winsz = csbi.dwSize.X * (csbi.srWindow.Bottom - csbi.srWindow.Top + 1); 1767 topleft.X = 0; 1768 topleft.Y = csbi.srWindow.Top; 1769 1770 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 1771 FillConsoleOutputCharacter(con_out, ' ', winsz, topleft, &nchars); 1772 FillConsoleOutputAttribute(con_out, curr_attr, winsz, topleft, &nchars); 1773} 1774 1775/* 1776 * Remove the n topmost lines and scroll everything below it in the 1777 * window upward. 1778 */ 1779 public void 1780win32_scroll_up(n) 1781 int n; 1782{ 1783 SMALL_RECT rcSrc, rcClip; 1784 CHAR_INFO fillchar; 1785 COORD topleft; 1786 COORD new_org; 1787 DWORD nchars; 1788 DWORD size; 1789 CONSOLE_SCREEN_BUFFER_INFO csbi; 1790 1791 if (n <= 0) 1792 return; 1793 1794 if (n >= sc_height - 1) 1795 { 1796 win32_clear(); 1797 _settextposition(1,1); 1798 return; 1799 } 1800 1801 /* Get the extent of what will remain visible after scrolling. */ 1802 GetConsoleScreenBufferInfo(con_out, &csbi); 1803 rcSrc.Left = csbi.srWindow.Left; 1804 rcSrc.Top = csbi.srWindow.Top + n; 1805 rcSrc.Right = csbi.srWindow.Right; 1806 rcSrc.Bottom = csbi.srWindow.Bottom; 1807 1808 /* Get the clip rectangle. */ 1809 rcClip.Left = rcSrc.Left; 1810 rcClip.Top = csbi.srWindow.Top; 1811 rcClip.Right = rcSrc.Right; 1812 rcClip.Bottom = rcSrc.Bottom ; 1813 1814 /* Move the source text to the top of the screen. */ 1815 new_org.X = rcSrc.Left; 1816 new_org.Y = rcClip.Top; 1817 1818 /* Fill the right character and attributes. */ 1819 fillchar.Char.AsciiChar = ' '; 1820 fillchar.Attributes = MAKEATTR(nm_fg_color, nm_bg_color); 1821 1822 /* Scroll the window. */ 1823 SetConsoleTextAttribute(con_out, fillchar.Attributes); 1824 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); 1825 1826 /* Clear remaining lines at bottom. */ 1827 topleft.X = csbi.dwCursorPosition.X; 1828 topleft.Y = rcSrc.Bottom - n; 1829 size = (n * csbi.dwSize.X) + (rcSrc.Right - topleft.X); 1830 FillConsoleOutputCharacter(con_out, ' ', size, topleft, 1831 &nchars); 1832 FillConsoleOutputAttribute(con_out, fillchar.Attributes, size, topleft, 1833 &nchars); 1834 SetConsoleTextAttribute(con_out, curr_attr); 1835 1836 /* Move cursor n lines up from where it was. */ 1837 csbi.dwCursorPosition.Y -= n; 1838 SetConsoleCursorPosition(con_out, csbi.dwCursorPosition); 1839} 1840#endif 1841 1842/* 1843 * Move cursor to lower left corner of screen. 1844 */ 1845 public void 1846lower_left() 1847{ 1848 if (!init_done) 1849 return; 1850#if !MSDOS_COMPILER 1851 tputs(sc_lower_left, 1, putchr); 1852#else 1853 flush(); 1854 _settextposition(sc_height, 1); 1855#endif 1856} 1857 1858/* 1859 * Move cursor to left position of current line. 1860 */ 1861 public void 1862line_left() 1863{ 1864#if !MSDOS_COMPILER 1865 tputs(sc_return, 1, putchr); 1866#else 1867 int row; 1868 flush(); 1869#if MSDOS_COMPILER==WIN32C 1870 { 1871 CONSOLE_SCREEN_BUFFER_INFO scr; 1872 GetConsoleScreenBufferInfo(con_out, &scr); 1873 row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1; 1874 } 1875#else 1876#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 1877 row = wherey(); 1878#else 1879 { 1880 struct rccoord tpos = _gettextposition(); 1881 row = tpos.row; 1882 } 1883#endif 1884#endif 1885 _settextposition(row, 1); 1886#endif 1887} 1888 1889/* 1890 * Check if the console size has changed and reset internals 1891 * (in lieu of SIGWINCH for WIN32). 1892 */ 1893 public void 1894check_winch() 1895{ 1896#if MSDOS_COMPILER==WIN32C 1897 CONSOLE_SCREEN_BUFFER_INFO scr; 1898 COORD size; 1899 1900 if (con_out == INVALID_HANDLE_VALUE) 1901 return; 1902 1903 flush(); 1904 GetConsoleScreenBufferInfo(con_out, &scr); 1905 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1; 1906 size.X = scr.srWindow.Right - scr.srWindow.Left + 1; 1907 if (size.Y != sc_height || size.X != sc_width) 1908 { 1909 sc_height = size.Y; 1910 sc_width = size.X; 1911 if (!no_init && con_out_ours == con_out) 1912 SetConsoleScreenBufferSize(con_out, size); 1913 pos_init(); 1914 wscroll = (sc_height + 1) / 2; 1915 screen_trashed = 1; 1916 } 1917#endif 1918} 1919 1920/* 1921 * Goto a specific line on the screen. 1922 */ 1923 public void 1924goto_line(sindex) 1925 int sindex; 1926{ 1927#if !MSDOS_COMPILER 1928 tputs(tgoto(sc_move, 0, sindex), 1, putchr); 1929#else 1930 flush(); 1931 _settextposition(sindex+1, 1); 1932#endif 1933} 1934 1935#if MSDOS_COMPILER==MSOFTC || MSDOS_COMPILER==BORLANDC 1936/* 1937 * Create an alternate screen which is all white. 1938 * This screen is used to create a "flash" effect, by displaying it 1939 * briefly and then switching back to the normal screen. 1940 * {{ Yuck! There must be a better way to get a visual bell. }} 1941 */ 1942 static void 1943create_flash() 1944{ 1945#if MSDOS_COMPILER==MSOFTC 1946 struct videoconfig w; 1947 char *blanks; 1948 int row, col; 1949 1950 _getvideoconfig(&w); 1951 videopages = w.numvideopages; 1952 if (videopages < 2) 1953 { 1954 at_enter(AT_STANDOUT); 1955 at_exit(); 1956 } else 1957 { 1958 _setactivepage(1); 1959 at_enter(AT_STANDOUT); 1960 blanks = (char *) ecalloc(w.numtextcols, sizeof(char)); 1961 for (col = 0; col < w.numtextcols; col++) 1962 blanks[col] = ' '; 1963 for (row = w.numtextrows; row > 0; row--) 1964 _outmem(blanks, w.numtextcols); 1965 _setactivepage(0); 1966 _setvisualpage(0); 1967 free(blanks); 1968 at_exit(); 1969 } 1970#else 1971#if MSDOS_COMPILER==BORLANDC 1972 int n; 1973 1974 whitescreen = (unsigned short *) 1975 malloc(sc_width * sc_height * sizeof(short)); 1976 if (whitescreen == NULL) 1977 return; 1978 for (n = 0; n < sc_width * sc_height; n++) 1979 whitescreen[n] = 0x7020; 1980#else 1981#if MSDOS_COMPILER==WIN32C 1982 int n; 1983 1984 whitescreen = (WORD *) 1985 malloc(sc_height * sc_width * sizeof(WORD)); 1986 if (whitescreen == NULL) 1987 return; 1988 /* Invert the standard colors. */ 1989 for (n = 0; n < sc_width * sc_height; n++) 1990 whitescreen[n] = (WORD)((nm_fg_color << 4) | nm_bg_color); 1991#endif 1992#endif 1993#endif 1994 flash_created = 1; 1995} 1996#endif /* MSDOS_COMPILER */ 1997 1998/* 1999 * Output the "visual bell", if there is one. 2000 */ 2001 public void 2002vbell() 2003{ 2004#if !MSDOS_COMPILER 2005 if (*sc_visual_bell == '\0') 2006 return; 2007 tputs(sc_visual_bell, sc_height, putchr); 2008#else 2009#if MSDOS_COMPILER==DJGPPC 2010 ScreenVisualBell(); 2011#else 2012#if MSDOS_COMPILER==MSOFTC 2013 /* 2014 * Create a flash screen on the second video page. 2015 * Switch to that page, then switch back. 2016 */ 2017 if (!flash_created) 2018 create_flash(); 2019 if (videopages < 2) 2020 return; 2021 _setvisualpage(1); 2022 delay(100); 2023 _setvisualpage(0); 2024#else 2025#if MSDOS_COMPILER==BORLANDC 2026 unsigned short *currscreen; 2027 2028 /* 2029 * Get a copy of the current screen. 2030 * Display the flash screen. 2031 * Then restore the old screen. 2032 */ 2033 if (!flash_created) 2034 create_flash(); 2035 if (whitescreen == NULL) 2036 return; 2037 currscreen = (unsigned short *) 2038 malloc(sc_width * sc_height * sizeof(short)); 2039 if (currscreen == NULL) return; 2040 gettext(1, 1, sc_width, sc_height, currscreen); 2041 puttext(1, 1, sc_width, sc_height, whitescreen); 2042 delay(100); 2043 puttext(1, 1, sc_width, sc_height, currscreen); 2044 free(currscreen); 2045#else 2046#if MSDOS_COMPILER==WIN32C 2047 /* paint screen with an inverse color */ 2048 clear(); 2049 2050 /* leave it displayed for 100 msec. */ 2051 Sleep(100); 2052 2053 /* restore with a redraw */ 2054 repaint(); 2055#endif 2056#endif 2057#endif 2058#endif 2059#endif 2060} 2061 2062/* 2063 * Make a noise. 2064 */ 2065 static void 2066beep() 2067{ 2068#if !MSDOS_COMPILER 2069 putchr(CONTROL('G')); 2070#else 2071#if MSDOS_COMPILER==WIN32C 2072 MessageBeep(0); 2073#else 2074 write(1, "\7", 1); 2075#endif 2076#endif 2077} 2078 2079/* 2080 * Ring the terminal bell. 2081 */ 2082 public void 2083bell() 2084{ 2085 if (quiet == VERY_QUIET) 2086 vbell(); 2087 else 2088 beep(); 2089} 2090 2091/* 2092 * Clear the screen. 2093 */ 2094 public void 2095clear() 2096{ 2097#if !MSDOS_COMPILER 2098 tputs(sc_clear, sc_height, putchr); 2099#else 2100 flush(); 2101#if MSDOS_COMPILER==WIN32C 2102 win32_clear(); 2103#else 2104 _clearscreen(_GCLEARSCREEN); 2105#endif 2106#endif 2107} 2108 2109/* 2110 * Clear from the cursor to the end of the cursor's line. 2111 * {{ This must not move the cursor. }} 2112 */ 2113 public void 2114clear_eol() 2115{ 2116#if !MSDOS_COMPILER 2117 tputs(sc_eol_clear, 1, putchr); 2118#else 2119#if MSDOS_COMPILER==MSOFTC 2120 short top, left; 2121 short bot, right; 2122 struct rccoord tpos; 2123 2124 flush(); 2125 /* 2126 * Save current state. 2127 */ 2128 tpos = _gettextposition(); 2129 _gettextwindow(&top, &left, &bot, &right); 2130 /* 2131 * Set a temporary window to the current line, 2132 * from the cursor's position to the right edge of the screen. 2133 * Then clear that window. 2134 */ 2135 _settextwindow(tpos.row, tpos.col, tpos.row, sc_width); 2136 _clearscreen(_GWINDOW); 2137 /* 2138 * Restore state. 2139 */ 2140 _settextwindow(top, left, bot, right); 2141 _settextposition(tpos.row, tpos.col); 2142#else 2143#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 2144 flush(); 2145 clreol(); 2146#else 2147#if MSDOS_COMPILER==WIN32C 2148 DWORD nchars; 2149 COORD cpos; 2150 CONSOLE_SCREEN_BUFFER_INFO scr; 2151 2152 flush(); 2153 memset(&scr, 0, sizeof(scr)); 2154 GetConsoleScreenBufferInfo(con_out, &scr); 2155 cpos.X = scr.dwCursorPosition.X; 2156 cpos.Y = scr.dwCursorPosition.Y; 2157 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 2158 FillConsoleOutputAttribute(con_out, curr_attr, 2159 scr.dwSize.X - cpos.X, cpos, &nchars); 2160 FillConsoleOutputCharacter(con_out, ' ', 2161 scr.dwSize.X - cpos.X, cpos, &nchars); 2162#endif 2163#endif 2164#endif 2165#endif 2166} 2167 2168/* 2169 * Clear the current line. 2170 * Clear the screen if there's off-screen memory below the display. 2171 */ 2172 static void 2173clear_eol_bot() 2174{ 2175#if MSDOS_COMPILER 2176 clear_eol(); 2177#else 2178 if (below_mem) 2179 tputs(sc_eos_clear, 1, putchr); 2180 else 2181 tputs(sc_eol_clear, 1, putchr); 2182#endif 2183} 2184 2185/* 2186 * Clear the bottom line of the display. 2187 * Leave the cursor at the beginning of the bottom line. 2188 */ 2189 public void 2190clear_bot() 2191{ 2192 /* 2193 * If we're in a non-normal attribute mode, temporarily exit 2194 * the mode while we do the clear. Some terminals fill the 2195 * cleared area with the current attribute. 2196 */ 2197 if (oldbot) 2198 lower_left(); 2199 else 2200 line_left(); 2201 2202 if (attrmode == AT_NORMAL) 2203 clear_eol_bot(); 2204 else 2205 { 2206 int saved_attrmode = attrmode; 2207 2208 at_exit(); 2209 clear_eol_bot(); 2210 at_enter(saved_attrmode); 2211 } 2212} 2213 2214 public void 2215at_enter(attr) 2216 int attr; 2217{ 2218 attr = apply_at_specials(attr); 2219 2220#if !MSDOS_COMPILER 2221 /* The one with the most priority is last. */ 2222 if (attr & AT_UNDERLINE) 2223 tputs(sc_u_in, 1, putchr); 2224 if (attr & AT_BOLD) 2225 tputs(sc_b_in, 1, putchr); 2226 if (attr & AT_BLINK) 2227 tputs(sc_bl_in, 1, putchr); 2228 if (attr & AT_STANDOUT) 2229 tputs(sc_s_in, 1, putchr); 2230#else 2231 flush(); 2232 /* The one with the most priority is first. */ 2233 if (attr & AT_STANDOUT) 2234 { 2235 SETCOLORS(so_fg_color, so_bg_color); 2236 } else if (attr & AT_BLINK) 2237 { 2238 SETCOLORS(bl_fg_color, bl_bg_color); 2239 } 2240 else if (attr & AT_BOLD) 2241 { 2242 SETCOLORS(bo_fg_color, bo_bg_color); 2243 } 2244 else if (attr & AT_UNDERLINE) 2245 { 2246 SETCOLORS(ul_fg_color, ul_bg_color); 2247 } 2248#endif 2249 2250 attrmode = attr; 2251} 2252 2253 public void 2254at_exit() 2255{ 2256#if !MSDOS_COMPILER 2257 /* Undo things in the reverse order we did them. */ 2258 if (attrmode & AT_STANDOUT) 2259 tputs(sc_s_out, 1, putchr); 2260 if (attrmode & AT_BLINK) 2261 tputs(sc_bl_out, 1, putchr); 2262 if (attrmode & AT_BOLD) 2263 tputs(sc_b_out, 1, putchr); 2264 if (attrmode & AT_UNDERLINE) 2265 tputs(sc_u_out, 1, putchr); 2266#else 2267 flush(); 2268 SETCOLORS(nm_fg_color, nm_bg_color); 2269#endif 2270 2271 attrmode = AT_NORMAL; 2272} 2273 2274 public void 2275at_switch(attr) 2276 int attr; 2277{ 2278 int new_attrmode = apply_at_specials(attr); 2279 int ignore_modes = AT_ANSI; 2280 2281 if ((new_attrmode & ~ignore_modes) != (attrmode & ~ignore_modes)) 2282 { 2283 at_exit(); 2284 at_enter(attr); 2285 } 2286} 2287 2288 public int 2289is_at_equiv(attr1, attr2) 2290 int attr1; 2291 int attr2; 2292{ 2293 attr1 = apply_at_specials(attr1); 2294 attr2 = apply_at_specials(attr2); 2295 2296 return (attr1 == attr2); 2297} 2298 2299 public int 2300apply_at_specials(attr) 2301 int attr; 2302{ 2303 if (attr & AT_BINARY) 2304 attr |= binattr; 2305 if (attr & AT_HILITE) 2306 attr |= AT_STANDOUT; 2307 attr &= ~(AT_BINARY|AT_HILITE); 2308 2309 return attr; 2310} 2311 2312#if 0 /* No longer used */ 2313/* 2314 * Erase the character to the left of the cursor 2315 * and move the cursor left. 2316 */ 2317 public void 2318backspace() 2319{ 2320#if !MSDOS_COMPILER 2321 /* 2322 * Erase the previous character by overstriking with a space. 2323 */ 2324 tputs(sc_backspace, 1, putchr); 2325 putchr(' '); 2326 tputs(sc_backspace, 1, putchr); 2327#else 2328#if MSDOS_COMPILER==MSOFTC 2329 struct rccoord tpos; 2330 2331 flush(); 2332 tpos = _gettextposition(); 2333 if (tpos.col <= 1) 2334 return; 2335 _settextposition(tpos.row, tpos.col-1); 2336 _outtext(" "); 2337 _settextposition(tpos.row, tpos.col-1); 2338#else 2339#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 2340 cputs("\b"); 2341#else 2342#if MSDOS_COMPILER==WIN32C 2343 COORD cpos; 2344 DWORD cChars; 2345 CONSOLE_SCREEN_BUFFER_INFO scr; 2346 2347 flush(); 2348 GetConsoleScreenBufferInfo(con_out, &scr); 2349 cpos = scr.dwCursorPosition; 2350 if (cpos.X <= 0) 2351 return; 2352 cpos.X--; 2353 SetConsoleCursorPosition(con_out, cpos); 2354 FillConsoleOutputCharacter(con_out, (TCHAR)' ', 1, cpos, &cChars); 2355 SetConsoleCursorPosition(con_out, cpos); 2356#endif 2357#endif 2358#endif 2359#endif 2360} 2361#endif /* 0 */ 2362 2363/* 2364 * Output a plain backspace, without erasing the previous char. 2365 */ 2366 public void 2367putbs() 2368{ 2369#if !MSDOS_COMPILER 2370 tputs(sc_backspace, 1, putchr); 2371#else 2372 int row, col; 2373 2374 flush(); 2375 { 2376#if MSDOS_COMPILER==MSOFTC 2377 struct rccoord tpos; 2378 tpos = _gettextposition(); 2379 row = tpos.row; 2380 col = tpos.col; 2381#else 2382#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 2383 row = wherey(); 2384 col = wherex(); 2385#else 2386#if MSDOS_COMPILER==WIN32C 2387 CONSOLE_SCREEN_BUFFER_INFO scr; 2388 GetConsoleScreenBufferInfo(con_out, &scr); 2389 row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1; 2390 col = scr.dwCursorPosition.X - scr.srWindow.Left + 1; 2391#endif 2392#endif 2393#endif 2394 } 2395 if (col <= 1) 2396 return; 2397 _settextposition(row, col-1); 2398#endif /* MSDOS_COMPILER */ 2399} 2400 2401#if MSDOS_COMPILER==WIN32C 2402/* 2403 * Determine whether an input character is waiting to be read. 2404 */ 2405 static int 2406win32_kbhit(tty) 2407 HANDLE tty; 2408{ 2409 INPUT_RECORD ip; 2410 DWORD read; 2411 2412 if (keyCount > 0) 2413 return (TRUE); 2414 2415 currentKey.ascii = 0; 2416 currentKey.scan = 0; 2417 2418 /* 2419 * Wait for a real key-down event, but 2420 * ignore SHIFT and CONTROL key events. 2421 */ 2422 do 2423 { 2424 PeekConsoleInput(tty, &ip, 1, &read); 2425 if (read == 0) 2426 return (FALSE); 2427 ReadConsoleInput(tty, &ip, 1, &read); 2428 } while (ip.EventType != KEY_EVENT || 2429 ip.Event.KeyEvent.bKeyDown != TRUE || 2430 ip.Event.KeyEvent.wVirtualScanCode == 0 || 2431 ip.Event.KeyEvent.wVirtualKeyCode == VK_SHIFT || 2432 ip.Event.KeyEvent.wVirtualKeyCode == VK_CONTROL || 2433 ip.Event.KeyEvent.wVirtualKeyCode == VK_MENU); 2434 2435 currentKey.ascii = ip.Event.KeyEvent.uChar.AsciiChar; 2436 currentKey.scan = ip.Event.KeyEvent.wVirtualScanCode; 2437 keyCount = ip.Event.KeyEvent.wRepeatCount; 2438 2439 if (ip.Event.KeyEvent.dwControlKeyState & 2440 (LEFT_ALT_PRESSED | RIGHT_ALT_PRESSED)) 2441 { 2442 switch (currentKey.scan) 2443 { 2444 case PCK_ALT_E: /* letter 'E' */ 2445 currentKey.ascii = 0; 2446 break; 2447 } 2448 } else if (ip.Event.KeyEvent.dwControlKeyState & 2449 (LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED)) 2450 { 2451 switch (currentKey.scan) 2452 { 2453 case PCK_RIGHT: /* right arrow */ 2454 currentKey.scan = PCK_CTL_RIGHT; 2455 break; 2456 case PCK_LEFT: /* left arrow */ 2457 currentKey.scan = PCK_CTL_LEFT; 2458 break; 2459 case PCK_DELETE: /* delete */ 2460 currentKey.scan = PCK_CTL_DELETE; 2461 break; 2462 } 2463 } else if (ip.Event.KeyEvent.dwControlKeyState & SHIFT_PRESSED) 2464 { 2465 switch (currentKey.scan) 2466 { 2467 case PCK_SHIFT_TAB: /* tab */ 2468 currentKey.ascii = 0; 2469 break; 2470 } 2471 } 2472 2473 return (TRUE); 2474} 2475 2476/* 2477 * Read a character from the keyboard. 2478 */ 2479 public char 2480WIN32getch(tty) 2481 int tty; 2482{ 2483 int ascii; 2484 2485 if (pending_scancode) 2486 { 2487 pending_scancode = 0; 2488 return ((char)(currentKey.scan & 0x00FF)); 2489 } 2490 2491 while (win32_kbhit((HANDLE)tty) == FALSE) 2492 { 2493 Sleep(20); 2494 if (ABORT_SIGS()) 2495 return ('\003'); 2496 continue; 2497 } 2498 keyCount --; 2499 ascii = currentKey.ascii; 2500 /* 2501 * On PC's, the extended keys return a 2 byte sequence beginning 2502 * with '00', so if the ascii code is 00, the next byte will be 2503 * the lsb of the scan code. 2504 */ 2505 pending_scancode = (ascii == 0x00); 2506 return ((char)ascii); 2507} 2508#endif 2509 2510#if MSDOS_COMPILER 2511/* 2512 */ 2513 public void 2514WIN32setcolors(fg, bg) 2515 int fg; 2516 int bg; 2517{ 2518 SETCOLORS(fg, bg); 2519} 2520 2521/* 2522 */ 2523 public void 2524WIN32textout(text, len) 2525 char *text; 2526 int len; 2527{ 2528#if MSDOS_COMPILER==WIN32C 2529 DWORD written; 2530 if (utf_mode == 2) 2531 { 2532 /* 2533 * We've got UTF-8 text in a non-UTF-8 console. Convert it to 2534 * wide and use WriteConsoleW. 2535 */ 2536 WCHAR wtext[1024]; 2537 len = MultiByteToWideChar(CP_UTF8, 0, text, len, wtext, 2538 sizeof(wtext)/sizeof(*wtext)); 2539 WriteConsoleW(con_out, wtext, len, &written, NULL); 2540 } else 2541 WriteConsole(con_out, text, len, &written, NULL); 2542#else 2543 char c = text[len]; 2544 text[len] = '\0'; 2545 cputs(text); 2546 text[len] = c; 2547#endif 2548} 2549#endif 2550