screen.c revision 242584
1/* $FreeBSD: head/contrib/less/screen.c 242584 2012-11-04 20:52:26Z delphij $ */ 2/* 3 * Copyright (C) 1984-2012 Mark Nudelman 4 * 5 * You may distribute under the terms of either the GNU General Public 6 * License or the Less License, as specified in the README file. 7 * 8 * For more information, see the README file. 9 */ 10 11 12/* 13 * Routines which deal with the characteristics of the terminal. 14 * Uses termcap to be as terminal-independent as possible. 15 */ 16 17#include "less.h" 18#include "cmd.h" 19 20#if MSDOS_COMPILER 21#include "pckeys.h" 22#if MSDOS_COMPILER==MSOFTC 23#include <graph.h> 24#else 25#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 26#include <conio.h> 27#if MSDOS_COMPILER==DJGPPC 28#include <pc.h> 29extern int fd0; 30#endif 31#else 32#if MSDOS_COMPILER==WIN32C 33#include <windows.h> 34#endif 35#endif 36#endif 37#include <time.h> 38 39#else 40 41#if HAVE_SYS_IOCTL_H 42#include <sys/ioctl.h> 43#endif 44 45#if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS 46#include <termios.h> 47#else 48#if HAVE_TERMIO_H 49#include <termio.h> 50#else 51#if HAVE_SGSTAT_H 52#include <sgstat.h> 53#else 54#include <sgtty.h> 55#endif 56#endif 57#endif 58 59#if HAVE_TERMCAP_H 60#include <termcap.h> 61#endif 62#ifdef _OSK 63#include <signal.h> 64#endif 65#if OS2 66#include <sys/signal.h> 67#include "pckeys.h" 68#endif 69#if HAVE_SYS_STREAM_H 70#include <sys/stream.h> 71#endif 72#if HAVE_SYS_PTEM_H 73#include <sys/ptem.h> 74#endif 75 76#endif /* MSDOS_COMPILER */ 77 78/* 79 * Check for broken termios package that forces you to manually 80 * set the line discipline. 81 */ 82#ifdef __ultrix__ 83#define MUST_SET_LINE_DISCIPLINE 1 84#else 85#define MUST_SET_LINE_DISCIPLINE 0 86#endif 87 88#if OS2 89#define DEFAULT_TERM "ansi" 90static char *windowid; 91#else 92#define DEFAULT_TERM "unknown" 93#endif 94 95#if MSDOS_COMPILER==MSOFTC 96static int videopages; 97static long msec_loops; 98static int flash_created = 0; 99#define SETCOLORS(fg,bg) { _settextcolor(fg); _setbkcolor(bg); } 100#endif 101 102#if MSDOS_COMPILER==BORLANDC 103static unsigned short *whitescreen; 104static int flash_created = 0; 105#endif 106#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 107#define _settextposition(y,x) gotoxy(x,y) 108#define _clearscreen(m) clrscr() 109#define _outtext(s) cputs(s) 110#define SETCOLORS(fg,bg) { textcolor(fg); textbackground(bg); } 111extern int sc_height; 112#endif 113 114#if MSDOS_COMPILER==WIN32C 115struct keyRecord 116{ 117 int ascii; 118 int scan; 119} currentKey; 120 121static int keyCount = 0; 122static WORD curr_attr; 123static int pending_scancode = 0; 124static WORD *whitescreen; 125 126static HANDLE con_out_save = INVALID_HANDLE_VALUE; /* previous console */ 127static HANDLE con_out_ours = INVALID_HANDLE_VALUE; /* our own */ 128HANDLE con_out = INVALID_HANDLE_VALUE; /* current console */ 129 130extern int quitting; 131static void win32_init_term(); 132static void win32_deinit_term(); 133 134#define FG_COLORS (FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_INTENSITY) 135#define BG_COLORS (BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE | BACKGROUND_INTENSITY) 136#define MAKEATTR(fg,bg) ((WORD)((fg)|((bg)<<4))) 137#define SETCOLORS(fg,bg) { curr_attr = MAKEATTR(fg,bg); \ 138 if (SetConsoleTextAttribute(con_out, curr_attr) == 0) \ 139 error("SETCOLORS failed"); } 140#endif 141 142#if MSDOS_COMPILER 143public int nm_fg_color; /* Color of normal text */ 144public int nm_bg_color; 145public int bo_fg_color; /* Color of bold text */ 146public int bo_bg_color; 147public int ul_fg_color; /* Color of underlined text */ 148public int ul_bg_color; 149public int so_fg_color; /* Color of standout text */ 150public int so_bg_color; 151public int bl_fg_color; /* Color of blinking text */ 152public int bl_bg_color; 153static int sy_fg_color; /* Color of system text (before less) */ 154static int sy_bg_color; 155 156#else 157 158/* 159 * Strings passed to tputs() to do various terminal functions. 160 */ 161static char 162 *sc_pad, /* Pad string */ 163 *sc_home, /* Cursor home */ 164 *sc_addline, /* Add line, scroll down following lines */ 165 *sc_lower_left, /* Cursor to last line, first column */ 166 *sc_return, /* Cursor to beginning of current line */ 167 *sc_move, /* General cursor positioning */ 168 *sc_clear, /* Clear screen */ 169 *sc_eol_clear, /* Clear to end of line */ 170 *sc_eos_clear, /* Clear to end of screen */ 171 *sc_s_in, /* Enter standout (highlighted) mode */ 172 *sc_s_out, /* Exit standout mode */ 173 *sc_u_in, /* Enter underline mode */ 174 *sc_u_out, /* Exit underline mode */ 175 *sc_b_in, /* Enter bold mode */ 176 *sc_b_out, /* Exit bold mode */ 177 *sc_bl_in, /* Enter blink mode */ 178 *sc_bl_out, /* Exit blink mode */ 179 *sc_visual_bell, /* Visual bell (flash screen) sequence */ 180 *sc_backspace, /* Backspace cursor */ 181 *sc_s_keypad, /* Start keypad mode */ 182 *sc_e_keypad, /* End keypad mode */ 183 *sc_init, /* Startup terminal initialization */ 184 *sc_deinit; /* Exit terminal de-initialization */ 185#endif 186 187static int init_done = 0; 188 189public int auto_wrap; /* Terminal does \r\n when write past margin */ 190public int ignaw; /* Terminal ignores \n immediately after wrap */ 191public int erase_char; /* The user's erase char */ 192public int erase2_char; /* The user's other erase char */ 193public int kill_char; /* The user's line-kill char */ 194public int werase_char; /* The user's word-erase char */ 195public int sc_width, sc_height; /* Height & width of screen */ 196public int bo_s_width, bo_e_width; /* Printing width of boldface seq */ 197public int ul_s_width, ul_e_width; /* Printing width of underline seq */ 198public int so_s_width, so_e_width; /* Printing width of standout seq */ 199public int bl_s_width, bl_e_width; /* Printing width of blink seq */ 200public int above_mem, below_mem; /* Memory retained above/below screen */ 201public int can_goto_line; /* Can move cursor to any line */ 202public int clear_bg; /* Clear fills with background color */ 203public int missing_cap = 0; /* Some capability is missing */ 204 205static int attrmode = AT_NORMAL; 206extern int binattr; 207 208#if !MSDOS_COMPILER 209static char *cheaper(); 210static void tmodes(); 211#endif 212 213/* 214 * These two variables are sometimes defined in, 215 * and needed by, the termcap library. 216 */ 217#if MUST_DEFINE_OSPEED 218extern short ospeed; /* Terminal output baud rate */ 219extern char PC; /* Pad character */ 220#endif 221#ifdef _OSK 222short ospeed; 223char PC_, *UP, *BC; 224#endif 225 226extern int quiet; /* If VERY_QUIET, use visual bell for bell */ 227extern int no_back_scroll; 228extern int swindow; 229extern int no_init; 230extern int no_keypad; 231extern int sigs; 232extern int wscroll; 233extern int screen_trashed; 234extern int tty; 235extern int top_scroll; 236extern int oldbot; 237#if HILITE_SEARCH 238extern int hilite_search; 239#endif 240 241extern char *tgetstr(); 242extern char *tgoto(); 243 244 245/* 246 * Change terminal to "raw mode", or restore to "normal" mode. 247 * "Raw mode" means 248 * 1. An outstanding read will complete on receipt of a single keystroke. 249 * 2. Input is not echoed. 250 * 3. On output, \n is mapped to \r\n. 251 * 4. \t is NOT expanded into spaces. 252 * 5. Signal-causing characters such as ctrl-C (interrupt), 253 * etc. are NOT disabled. 254 * It doesn't matter whether an input \n is mapped to \r, or vice versa. 255 */ 256 public void 257raw_mode(on) 258 int on; 259{ 260 static int curr_on = 0; 261 262 if (on == curr_on) 263 return; 264 erase2_char = '\b'; /* in case OS doesn't know about erase2 */ 265#if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS 266 { 267 struct termios s; 268 static struct termios save_term; 269 static int saved_term = 0; 270 271 if (on) 272 { 273 /* 274 * Get terminal modes. 275 */ 276 tcgetattr(tty, &s); 277 278 /* 279 * Save modes and set certain variables dependent on modes. 280 */ 281 if (!saved_term) 282 { 283 save_term = s; 284 saved_term = 1; 285 } 286#if HAVE_OSPEED 287 switch (cfgetospeed(&s)) 288 { 289#ifdef B0 290 case B0: ospeed = 0; break; 291#endif 292#ifdef B50 293 case B50: ospeed = 1; break; 294#endif 295#ifdef B75 296 case B75: ospeed = 2; break; 297#endif 298#ifdef B110 299 case B110: ospeed = 3; break; 300#endif 301#ifdef B134 302 case B134: ospeed = 4; break; 303#endif 304#ifdef B150 305 case B150: ospeed = 5; break; 306#endif 307#ifdef B200 308 case B200: ospeed = 6; break; 309#endif 310#ifdef B300 311 case B300: ospeed = 7; break; 312#endif 313#ifdef B600 314 case B600: ospeed = 8; break; 315#endif 316#ifdef B1200 317 case B1200: ospeed = 9; break; 318#endif 319#ifdef B1800 320 case B1800: ospeed = 10; break; 321#endif 322#ifdef B2400 323 case B2400: ospeed = 11; break; 324#endif 325#ifdef B4800 326 case B4800: ospeed = 12; break; 327#endif 328#ifdef B9600 329 case B9600: ospeed = 13; break; 330#endif 331#ifdef EXTA 332 case EXTA: ospeed = 14; break; 333#endif 334#ifdef EXTB 335 case EXTB: ospeed = 15; break; 336#endif 337#ifdef B57600 338 case B57600: ospeed = 16; break; 339#endif 340#ifdef B115200 341 case B115200: ospeed = 17; break; 342#endif 343 default: ; 344 } 345#endif 346 erase_char = s.c_cc[VERASE]; 347#ifdef VERASE2 348 erase2_char = s.c_cc[VERASE2]; 349#endif 350 kill_char = s.c_cc[VKILL]; 351#ifdef VWERASE 352 werase_char = s.c_cc[VWERASE]; 353#else 354 werase_char = CONTROL('W'); 355#endif 356 357 /* 358 * Set the modes to the way we want them. 359 */ 360 s.c_lflag &= ~(0 361#ifdef ICANON 362 | ICANON 363#endif 364#ifdef ECHO 365 | ECHO 366#endif 367#ifdef ECHOE 368 | ECHOE 369#endif 370#ifdef ECHOK 371 | ECHOK 372#endif 373#if ECHONL 374 | ECHONL 375#endif 376 ); 377 378 s.c_oflag |= (0 379#ifdef OXTABS 380 | OXTABS 381#else 382#ifdef TAB3 383 | TAB3 384#else 385#ifdef XTABS 386 | XTABS 387#endif 388#endif 389#endif 390#ifdef OPOST 391 | OPOST 392#endif 393#ifdef ONLCR 394 | ONLCR 395#endif 396 ); 397 398 s.c_oflag &= ~(0 399#ifdef ONOEOT 400 | ONOEOT 401#endif 402#ifdef OCRNL 403 | OCRNL 404#endif 405#ifdef ONOCR 406 | ONOCR 407#endif 408#ifdef ONLRET 409 | ONLRET 410#endif 411 ); 412 s.c_cc[VMIN] = 1; 413 s.c_cc[VTIME] = 0; 414#ifdef VLNEXT 415 s.c_cc[VLNEXT] = 0; 416#endif 417#ifdef VDSUSP 418 s.c_cc[VDSUSP] = 0; 419#endif 420#if MUST_SET_LINE_DISCIPLINE 421 /* 422 * System's termios is broken; need to explicitly 423 * request TERMIODISC line discipline. 424 */ 425 s.c_line = TERMIODISC; 426#endif 427 } else 428 { 429 /* 430 * Restore saved modes. 431 */ 432 s = save_term; 433 } 434#if HAVE_FSYNC 435 fsync(tty); 436#endif 437 tcsetattr(tty, TCSADRAIN, &s); 438#if MUST_SET_LINE_DISCIPLINE 439 if (!on) 440 { 441 /* 442 * Broken termios *ignores* any line discipline 443 * except TERMIODISC. A different old line discipline 444 * is therefore not restored, yet. Restore the old 445 * line discipline by hand. 446 */ 447 ioctl(tty, TIOCSETD, &save_term.c_line); 448 } 449#endif 450 } 451#else 452#ifdef TCGETA 453 { 454 struct termio s; 455 static struct termio save_term; 456 static int saved_term = 0; 457 458 if (on) 459 { 460 /* 461 * Get terminal modes. 462 */ 463 ioctl(tty, TCGETA, &s); 464 465 /* 466 * Save modes and set certain variables dependent on modes. 467 */ 468 if (!saved_term) 469 { 470 save_term = s; 471 saved_term = 1; 472 } 473#if HAVE_OSPEED 474 ospeed = s.c_cflag & CBAUD; 475#endif 476 erase_char = s.c_cc[VERASE]; 477 kill_char = s.c_cc[VKILL]; 478#ifdef VWERASE 479 werase_char = s.c_cc[VWERASE]; 480#else 481 werase_char = CONTROL('W'); 482#endif 483 484 /* 485 * Set the modes to the way we want them. 486 */ 487 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); 488 s.c_oflag |= (OPOST|ONLCR|TAB3); 489 s.c_oflag &= ~(OCRNL|ONOCR|ONLRET); 490 s.c_cc[VMIN] = 1; 491 s.c_cc[VTIME] = 0; 492 } else 493 { 494 /* 495 * Restore saved modes. 496 */ 497 s = save_term; 498 } 499 ioctl(tty, TCSETAW, &s); 500 } 501#else 502#ifdef TIOCGETP 503 { 504 struct sgttyb s; 505 static struct sgttyb save_term; 506 static int saved_term = 0; 507 508 if (on) 509 { 510 /* 511 * Get terminal modes. 512 */ 513 ioctl(tty, TIOCGETP, &s); 514 515 /* 516 * Save modes and set certain variables dependent on modes. 517 */ 518 if (!saved_term) 519 { 520 save_term = s; 521 saved_term = 1; 522 } 523#if HAVE_OSPEED 524 ospeed = s.sg_ospeed; 525#endif 526 erase_char = s.sg_erase; 527 kill_char = s.sg_kill; 528 werase_char = CONTROL('W'); 529 530 /* 531 * Set the modes to the way we want them. 532 */ 533 s.sg_flags |= CBREAK; 534 s.sg_flags &= ~(ECHO|XTABS); 535 } else 536 { 537 /* 538 * Restore saved modes. 539 */ 540 s = save_term; 541 } 542 ioctl(tty, TIOCSETN, &s); 543 } 544#else 545#ifdef _OSK 546 { 547 struct sgbuf s; 548 static struct sgbuf save_term; 549 static int saved_term = 0; 550 551 if (on) 552 { 553 /* 554 * Get terminal modes. 555 */ 556 _gs_opt(tty, &s); 557 558 /* 559 * Save modes and set certain variables dependent on modes. 560 */ 561 if (!saved_term) 562 { 563 save_term = s; 564 saved_term = 1; 565 } 566 erase_char = s.sg_bspch; 567 kill_char = s.sg_dlnch; 568 werase_char = CONTROL('W'); 569 570 /* 571 * Set the modes to the way we want them. 572 */ 573 s.sg_echo = 0; 574 s.sg_eofch = 0; 575 s.sg_pause = 0; 576 s.sg_psch = 0; 577 } else 578 { 579 /* 580 * Restore saved modes. 581 */ 582 s = save_term; 583 } 584 _ss_opt(tty, &s); 585 } 586#else 587 /* MS-DOS, Windows, or OS2 */ 588#if OS2 589 /* OS2 */ 590 LSIGNAL(SIGINT, SIG_IGN); 591#endif 592 erase_char = '\b'; 593#if MSDOS_COMPILER==DJGPPC 594 kill_char = CONTROL('U'); 595 /* 596 * So that when we shell out or run another program, its 597 * stdin is in cooked mode. We do not switch stdin to binary 598 * mode if fd0 is zero, since that means we were called before 599 * tty was reopened in open_getchr, in which case we would be 600 * changing the original stdin device outside less. 601 */ 602 if (fd0 != 0) 603 setmode(0, on ? O_BINARY : O_TEXT); 604#else 605 kill_char = ESC; 606#endif 607 werase_char = CONTROL('W'); 608#endif 609#endif 610#endif 611#endif 612 curr_on = on; 613} 614 615#if !MSDOS_COMPILER 616/* 617 * Some glue to prevent calling termcap functions if tgetent() failed. 618 */ 619static int hardcopy; 620 621 static char * 622ltget_env(capname) 623 char *capname; 624{ 625 char name[16]; 626 char *s; 627 628 s = lgetenv("LESS_TERMCAP_DEBUG"); 629 if (s != NULL && *s != '\0') 630 { 631 struct env { struct env *next; char *name; char *value; }; 632 static struct env *envs = NULL; 633 struct env *p; 634 for (p = envs; p != NULL; p = p->next) 635 if (strcmp(p->name, capname) == 0) 636 return p->value; 637 p = (struct env *) ecalloc(1, sizeof(struct env)); 638 p->name = save(capname); 639 p->value = (char *) ecalloc(strlen(capname)+3, sizeof(char)); 640 sprintf(p->value, "<%s>", capname); 641 p->next = envs; 642 envs = p; 643 return p->value; 644 } 645 strcpy(name, "LESS_TERMCAP_"); 646 strcat(name, capname); 647 return (lgetenv(name)); 648} 649 650 static int 651ltgetflag(capname) 652 char *capname; 653{ 654 char *s; 655 656 if ((s = ltget_env(capname)) != NULL) 657 return (*s != '\0' && *s != '0'); 658 if (hardcopy) 659 return (0); 660 return (tgetflag(capname)); 661} 662 663 static int 664ltgetnum(capname) 665 char *capname; 666{ 667 char *s; 668 669 if ((s = ltget_env(capname)) != NULL) 670 return (atoi(s)); 671 if (hardcopy) 672 return (-1); 673 return (tgetnum(capname)); 674} 675 676 static char * 677ltgetstr(capname, pp) 678 char *capname; 679 char **pp; 680{ 681 char *s; 682 683 if ((s = ltget_env(capname)) != NULL) 684 return (s); 685 if (hardcopy) 686 return (NULL); 687 return (tgetstr(capname, pp)); 688} 689#endif /* MSDOS_COMPILER */ 690 691/* 692 * Get size of the output screen. 693 */ 694 public void 695scrsize() 696{ 697 register char *s; 698 int sys_height; 699 int sys_width; 700#if !MSDOS_COMPILER 701 int n; 702#endif 703 704#define DEF_SC_WIDTH 80 705#if MSDOS_COMPILER 706#define DEF_SC_HEIGHT 25 707#else 708#define DEF_SC_HEIGHT 24 709#endif 710 711 712 sys_width = sys_height = 0; 713 714#if MSDOS_COMPILER==MSOFTC 715 { 716 struct videoconfig w; 717 _getvideoconfig(&w); 718 sys_height = w.numtextrows; 719 sys_width = w.numtextcols; 720 } 721#else 722#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 723 { 724 struct text_info w; 725 gettextinfo(&w); 726 sys_height = w.screenheight; 727 sys_width = w.screenwidth; 728 } 729#else 730#if MSDOS_COMPILER==WIN32C 731 { 732 CONSOLE_SCREEN_BUFFER_INFO scr; 733 GetConsoleScreenBufferInfo(con_out, &scr); 734 sys_height = scr.srWindow.Bottom - scr.srWindow.Top + 1; 735 sys_width = scr.srWindow.Right - scr.srWindow.Left + 1; 736 } 737#else 738#if OS2 739 { 740 int s[2]; 741 _scrsize(s); 742 sys_width = s[0]; 743 sys_height = s[1]; 744 /* 745 * When using terminal emulators for XFree86/OS2, the 746 * _scrsize function does not work well. 747 * Call the scrsize.exe program to get the window size. 748 */ 749 windowid = getenv("WINDOWID"); 750 if (windowid != NULL) 751 { 752 FILE *fd = popen("scrsize", "rt"); 753 if (fd != NULL) 754 { 755 int w, h; 756 fscanf(fd, "%i %i", &w, &h); 757 if (w > 0 && h > 0) 758 { 759 sys_width = w; 760 sys_height = h; 761 } 762 pclose(fd); 763 } 764 } 765 } 766#else 767#ifdef TIOCGWINSZ 768 { 769 struct winsize w; 770 if (ioctl(2, TIOCGWINSZ, &w) == 0) 771 { 772 if (w.ws_row > 0) 773 sys_height = w.ws_row; 774 if (w.ws_col > 0) 775 sys_width = w.ws_col; 776 } 777 } 778#else 779#ifdef WIOCGETD 780 { 781 struct uwdata w; 782 if (ioctl(2, WIOCGETD, &w) == 0) 783 { 784 if (w.uw_height > 0) 785 sys_height = w.uw_height / w.uw_vs; 786 if (w.uw_width > 0) 787 sys_width = w.uw_width / w.uw_hs; 788 } 789 } 790#endif 791#endif 792#endif 793#endif 794#endif 795#endif 796 797 if (sys_height > 0) 798 sc_height = sys_height; 799 else if ((s = lgetenv("LINES")) != NULL) 800 sc_height = atoi(s); 801#if !MSDOS_COMPILER 802 else if ((n = ltgetnum("li")) > 0) 803 sc_height = n; 804#endif 805 if (sc_height <= 0) 806 sc_height = DEF_SC_HEIGHT; 807 808 if (sys_width > 0) 809 sc_width = sys_width; 810 else if ((s = lgetenv("COLUMNS")) != NULL) 811 sc_width = atoi(s); 812#if !MSDOS_COMPILER 813 else if ((n = ltgetnum("co")) > 0) 814 sc_width = n; 815#endif 816 if (sc_width <= 0) 817 sc_width = DEF_SC_WIDTH; 818} 819 820#if MSDOS_COMPILER==MSOFTC 821/* 822 * Figure out how many empty loops it takes to delay a millisecond. 823 */ 824 static void 825get_clock() 826{ 827 clock_t start; 828 829 /* 830 * Get synchronized at the start of a tick. 831 */ 832 start = clock(); 833 while (clock() == start) 834 ; 835 /* 836 * Now count loops till the next tick. 837 */ 838 start = clock(); 839 msec_loops = 0; 840 while (clock() == start) 841 msec_loops++; 842 /* 843 * Convert from (loops per clock) to (loops per millisecond). 844 */ 845 msec_loops *= CLOCKS_PER_SEC; 846 msec_loops /= 1000; 847} 848 849/* 850 * Delay for a specified number of milliseconds. 851 */ 852 static void 853dummy_func() 854{ 855 static long delay_dummy = 0; 856 delay_dummy++; 857} 858 859 static void 860delay(msec) 861 int msec; 862{ 863 long i; 864 865 while (msec-- > 0) 866 { 867 for (i = 0; i < msec_loops; i++) 868 { 869 /* 870 * Make it look like we're doing something here, 871 * so the optimizer doesn't remove the whole loop. 872 */ 873 dummy_func(); 874 } 875 } 876} 877#endif 878 879/* 880 * Return the characters actually input by a "special" key. 881 */ 882 public char * 883special_key_str(key) 884 int key; 885{ 886 static char tbuf[40]; 887 char *s; 888#if MSDOS_COMPILER || OS2 889 static char k_right[] = { '\340', PCK_RIGHT, 0 }; 890 static char k_left[] = { '\340', PCK_LEFT, 0 }; 891 static char k_ctl_right[] = { '\340', PCK_CTL_RIGHT, 0 }; 892 static char k_ctl_left[] = { '\340', PCK_CTL_LEFT, 0 }; 893 static char k_insert[] = { '\340', PCK_INSERT, 0 }; 894 static char k_delete[] = { '\340', PCK_DELETE, 0 }; 895 static char k_ctl_delete[] = { '\340', PCK_CTL_DELETE, 0 }; 896 static char k_ctl_backspace[] = { '\177', 0 }; 897 static char k_home[] = { '\340', PCK_HOME, 0 }; 898 static char k_end[] = { '\340', PCK_END, 0 }; 899 static char k_up[] = { '\340', PCK_UP, 0 }; 900 static char k_down[] = { '\340', PCK_DOWN, 0 }; 901 static char k_backtab[] = { '\340', PCK_SHIFT_TAB, 0 }; 902 static char k_pagedown[] = { '\340', PCK_PAGEDOWN, 0 }; 903 static char k_pageup[] = { '\340', PCK_PAGEUP, 0 }; 904 static char k_f1[] = { '\340', PCK_F1, 0 }; 905#endif 906#if !MSDOS_COMPILER 907 char *sp = tbuf; 908#endif 909 910 switch (key) 911 { 912#if OS2 913 /* 914 * If windowid is not NULL, assume less is executed in 915 * the XFree86 environment. 916 */ 917 case SK_RIGHT_ARROW: 918 s = windowid ? ltgetstr("kr", &sp) : k_right; 919 break; 920 case SK_LEFT_ARROW: 921 s = windowid ? ltgetstr("kl", &sp) : k_left; 922 break; 923 case SK_UP_ARROW: 924 s = windowid ? ltgetstr("ku", &sp) : k_up; 925 break; 926 case SK_DOWN_ARROW: 927 s = windowid ? ltgetstr("kd", &sp) : k_down; 928 break; 929 case SK_PAGE_UP: 930 s = windowid ? ltgetstr("kP", &sp) : k_pageup; 931 break; 932 case SK_PAGE_DOWN: 933 s = windowid ? ltgetstr("kN", &sp) : k_pagedown; 934 break; 935 case SK_HOME: 936 s = windowid ? ltgetstr("kh", &sp) : k_home; 937 break; 938 case SK_END: 939 s = windowid ? ltgetstr("@7", &sp) : k_end; 940 break; 941 case SK_DELETE: 942 if (windowid) 943 { 944 s = ltgetstr("kD", &sp); 945 if (s == NULL) 946 { 947 tbuf[0] = '\177'; 948 tbuf[1] = '\0'; 949 s = tbuf; 950 } 951 } else 952 s = k_delete; 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 1056get_term() 1057{ 1058#if MSDOS_COMPILER 1059 auto_wrap = 1; 1060 ignaw = 0; 1061 can_goto_line = 1; 1062 clear_bg = 1; 1063 /* 1064 * Set up default colors. 1065 * The xx_s_width and xx_e_width vars are already initialized to 0. 1066 */ 1067#if MSDOS_COMPILER==MSOFTC 1068 sy_bg_color = _getbkcolor(); 1069 sy_fg_color = _gettextcolor(); 1070 get_clock(); 1071#else 1072#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 1073 { 1074 struct text_info w; 1075 gettextinfo(&w); 1076 sy_bg_color = (w.attribute >> 4) & 0x0F; 1077 sy_fg_color = (w.attribute >> 0) & 0x0F; 1078 } 1079#else 1080#if MSDOS_COMPILER==WIN32C 1081 { 1082 DWORD nread; 1083 CONSOLE_SCREEN_BUFFER_INFO scr; 1084 1085 con_out_save = con_out = GetStdHandle(STD_OUTPUT_HANDLE); 1086 /* 1087 * Always open stdin in binary. Note this *must* be done 1088 * before any file operations have been done on fd0. 1089 */ 1090 SET_BINARY(0); 1091 GetConsoleScreenBufferInfo(con_out, &scr); 1092 ReadConsoleOutputAttribute(con_out, &curr_attr, 1093 1, scr.dwCursorPosition, &nread); 1094 sy_bg_color = (curr_attr & BG_COLORS) >> 4; /* normalize */ 1095 sy_fg_color = curr_attr & FG_COLORS; 1096 } 1097#endif 1098#endif 1099#endif 1100 nm_fg_color = sy_fg_color; 1101 nm_bg_color = sy_bg_color; 1102 bo_fg_color = 11; 1103 bo_bg_color = 0; 1104 ul_fg_color = 9; 1105 ul_bg_color = 0; 1106 so_fg_color = 15; 1107 so_bg_color = 9; 1108 bl_fg_color = 15; 1109 bl_bg_color = 0; 1110 1111 /* 1112 * Get size of the screen. 1113 */ 1114 scrsize(); 1115 pos_init(); 1116 1117 1118#else /* !MSDOS_COMPILER */ 1119 1120 char *sp; 1121 register char *t1, *t2; 1122 char *term; 1123 char termbuf[TERMBUF_SIZE]; 1124 1125 static char sbuf[TERMSBUF_SIZE]; 1126 1127#if OS2 1128 /* 1129 * Make sure the termcap database is available. 1130 */ 1131 sp = lgetenv("TERMCAP"); 1132 if (sp == NULL || *sp == '\0') 1133 { 1134 char *termcap; 1135 if ((sp = homefile("termcap.dat")) != NULL) 1136 { 1137 termcap = (char *) ecalloc(strlen(sp)+9, sizeof(char)); 1138 sprintf(termcap, "TERMCAP=%s", sp); 1139 free(sp); 1140 putenv(termcap); 1141 } 1142 } 1143#endif 1144 /* 1145 * Find out what kind of terminal this is. 1146 */ 1147 if ((term = lgetenv("TERM")) == NULL) 1148 term = DEFAULT_TERM; 1149 hardcopy = 0; 1150 if (tgetent(termbuf, term) != TGETENT_OK) 1151 hardcopy = 1; 1152 if (ltgetflag("hc")) 1153 hardcopy = 1; 1154 1155 /* 1156 * Get size of the screen. 1157 */ 1158 scrsize(); 1159 pos_init(); 1160 1161 auto_wrap = ltgetflag("am"); 1162 ignaw = ltgetflag("xn"); 1163 above_mem = ltgetflag("da"); 1164 below_mem = ltgetflag("db"); 1165 clear_bg = ltgetflag("ut"); 1166 1167 /* 1168 * Assumes termcap variable "sg" is the printing width of: 1169 * the standout sequence, the end standout sequence, 1170 * the underline sequence, the end underline sequence, 1171 * the boldface sequence, and the end boldface sequence. 1172 */ 1173 if ((so_s_width = ltgetnum("sg")) < 0) 1174 so_s_width = 0; 1175 so_e_width = so_s_width; 1176 1177 bo_s_width = bo_e_width = so_s_width; 1178 ul_s_width = ul_e_width = so_s_width; 1179 bl_s_width = bl_e_width = so_s_width; 1180 1181#if HILITE_SEARCH 1182 if (so_s_width > 0 || so_e_width > 0) 1183 /* 1184 * Disable highlighting by default on magic cookie terminals. 1185 * Turning on highlighting might change the displayed width 1186 * of a line, causing the display to get messed up. 1187 * The user can turn it back on with -g, 1188 * but she won't like the results. 1189 */ 1190 hilite_search = 0; 1191#endif 1192 1193 /* 1194 * Get various string-valued capabilities. 1195 */ 1196 sp = sbuf; 1197 1198#if HAVE_OSPEED 1199 sc_pad = ltgetstr("pc", &sp); 1200 if (sc_pad != NULL) 1201 PC = *sc_pad; 1202#endif 1203 1204 sc_s_keypad = ltgetstr("ks", &sp); 1205 if (sc_s_keypad == NULL) 1206 sc_s_keypad = ""; 1207 sc_e_keypad = ltgetstr("ke", &sp); 1208 if (sc_e_keypad == NULL) 1209 sc_e_keypad = ""; 1210 1211 sc_init = ltgetstr("ti", &sp); 1212 if (sc_init == NULL) 1213 sc_init = ""; 1214 1215 sc_deinit= ltgetstr("te", &sp); 1216 if (sc_deinit == NULL) 1217 sc_deinit = ""; 1218 1219 sc_eol_clear = ltgetstr("ce", &sp); 1220 if (sc_eol_clear == NULL || *sc_eol_clear == '\0') 1221 { 1222 missing_cap = 1; 1223 sc_eol_clear = ""; 1224 } 1225 1226 sc_eos_clear = ltgetstr("cd", &sp); 1227 if (below_mem && (sc_eos_clear == NULL || *sc_eos_clear == '\0')) 1228 { 1229 missing_cap = 1; 1230 sc_eos_clear = ""; 1231 } 1232 1233 sc_clear = ltgetstr("cl", &sp); 1234 if (sc_clear == NULL || *sc_clear == '\0') 1235 { 1236 missing_cap = 1; 1237 sc_clear = "\n\n"; 1238 } 1239 1240 sc_move = ltgetstr("cm", &sp); 1241 if (sc_move == NULL || *sc_move == '\0') 1242 { 1243 /* 1244 * This is not an error here, because we don't 1245 * always need sc_move. 1246 * We need it only if we don't have home or lower-left. 1247 */ 1248 sc_move = ""; 1249 can_goto_line = 0; 1250 } else 1251 can_goto_line = 1; 1252 1253 tmodes("so", "se", &sc_s_in, &sc_s_out, "", "", &sp); 1254 tmodes("us", "ue", &sc_u_in, &sc_u_out, sc_s_in, sc_s_out, &sp); 1255 tmodes("md", "me", &sc_b_in, &sc_b_out, sc_s_in, sc_s_out, &sp); 1256 tmodes("mb", "me", &sc_bl_in, &sc_bl_out, sc_s_in, sc_s_out, &sp); 1257 1258 sc_visual_bell = ltgetstr("vb", &sp); 1259 if (sc_visual_bell == NULL) 1260 sc_visual_bell = ""; 1261 1262 if (ltgetflag("bs")) 1263 sc_backspace = "\b"; 1264 else 1265 { 1266 sc_backspace = ltgetstr("bc", &sp); 1267 if (sc_backspace == NULL || *sc_backspace == '\0') 1268 sc_backspace = "\b"; 1269 } 1270 1271 /* 1272 * Choose between using "ho" and "cm" ("home" and "cursor move") 1273 * to move the cursor to the upper left corner of the screen. 1274 */ 1275 t1 = ltgetstr("ho", &sp); 1276 if (t1 == NULL) 1277 t1 = ""; 1278 if (*sc_move == '\0') 1279 t2 = ""; 1280 else 1281 { 1282 strcpy(sp, tgoto(sc_move, 0, 0)); 1283 t2 = sp; 1284 sp += strlen(sp) + 1; 1285 } 1286 sc_home = cheaper(t1, t2, "|\b^"); 1287 1288 /* 1289 * Choose between using "ll" and "cm" ("lower left" and "cursor move") 1290 * to move the cursor to the lower left corner of the screen. 1291 */ 1292 t1 = ltgetstr("ll", &sp); 1293 if (t1 == NULL) 1294 t1 = ""; 1295 if (*sc_move == '\0') 1296 t2 = ""; 1297 else 1298 { 1299 strcpy(sp, tgoto(sc_move, 0, sc_height-1)); 1300 t2 = sp; 1301 sp += strlen(sp) + 1; 1302 } 1303 sc_lower_left = cheaper(t1, t2, "\r"); 1304 1305 /* 1306 * Get carriage return string. 1307 */ 1308 sc_return = ltgetstr("cr", &sp); 1309 if (sc_return == NULL) 1310 sc_return = "\r"; 1311 1312 /* 1313 * Choose between using "al" or "sr" ("add line" or "scroll reverse") 1314 * to add a line at the top of the screen. 1315 */ 1316 t1 = ltgetstr("al", &sp); 1317 if (t1 == NULL) 1318 t1 = ""; 1319 t2 = ltgetstr("sr", &sp); 1320 if (t2 == NULL) 1321 t2 = ""; 1322#if OS2 1323 if (*t1 == '\0' && *t2 == '\0') 1324 sc_addline = ""; 1325 else 1326#endif 1327 if (above_mem) 1328 sc_addline = t1; 1329 else 1330 sc_addline = cheaper(t1, t2, ""); 1331 if (*sc_addline == '\0') 1332 { 1333 /* 1334 * Force repaint on any backward movement. 1335 */ 1336 no_back_scroll = 1; 1337 } 1338#endif /* MSDOS_COMPILER */ 1339} 1340 1341#if !MSDOS_COMPILER 1342/* 1343 * Return the cost of displaying a termcap string. 1344 * We use the trick of calling tputs, but as a char printing function 1345 * we give it inc_costcount, which just increments "costcount". 1346 * This tells us how many chars would be printed by using this string. 1347 * {{ Couldn't we just use strlen? }} 1348 */ 1349static int costcount; 1350 1351/*ARGSUSED*/ 1352 static int 1353inc_costcount(c) 1354 int c; 1355{ 1356 costcount++; 1357 return (c); 1358} 1359 1360 static int 1361cost(t) 1362 char *t; 1363{ 1364 costcount = 0; 1365 tputs(t, sc_height, inc_costcount); 1366 return (costcount); 1367} 1368 1369/* 1370 * Return the "best" of the two given termcap strings. 1371 * The best, if both exist, is the one with the lower 1372 * cost (see cost() function). 1373 */ 1374 static char * 1375cheaper(t1, t2, def) 1376 char *t1, *t2; 1377 char *def; 1378{ 1379 if (*t1 == '\0' && *t2 == '\0') 1380 { 1381 missing_cap = 1; 1382 return (def); 1383 } 1384 if (*t1 == '\0') 1385 return (t2); 1386 if (*t2 == '\0') 1387 return (t1); 1388 if (cost(t1) < cost(t2)) 1389 return (t1); 1390 return (t2); 1391} 1392 1393 static void 1394tmodes(incap, outcap, instr, outstr, def_instr, def_outstr, spp) 1395 char *incap; 1396 char *outcap; 1397 char **instr; 1398 char **outstr; 1399 char *def_instr; 1400 char *def_outstr; 1401 char **spp; 1402{ 1403 *instr = ltgetstr(incap, spp); 1404 if (*instr == NULL) 1405 { 1406 /* Use defaults. */ 1407 *instr = def_instr; 1408 *outstr = def_outstr; 1409 return; 1410 } 1411 1412 *outstr = ltgetstr(outcap, spp); 1413 if (*outstr == NULL) 1414 /* No specific out capability; use "me". */ 1415 *outstr = ltgetstr("me", spp); 1416 if (*outstr == NULL) 1417 /* Don't even have "me"; use a null string. */ 1418 *outstr = ""; 1419} 1420 1421#endif /* MSDOS_COMPILER */ 1422 1423 1424/* 1425 * Below are the functions which perform all the 1426 * terminal-specific screen manipulation. 1427 */ 1428 1429 1430#if MSDOS_COMPILER 1431 1432#if MSDOS_COMPILER==WIN32C 1433 static void 1434_settextposition(int row, int col) 1435{ 1436 COORD cpos; 1437 CONSOLE_SCREEN_BUFFER_INFO csbi; 1438 1439 GetConsoleScreenBufferInfo(con_out, &csbi); 1440 cpos.X = csbi.srWindow.Left + (col - 1); 1441 cpos.Y = csbi.srWindow.Top + (row - 1); 1442 SetConsoleCursorPosition(con_out, cpos); 1443} 1444#endif 1445 1446/* 1447 * Initialize the screen to the correct color at startup. 1448 */ 1449 static void 1450initcolor() 1451{ 1452 SETCOLORS(nm_fg_color, nm_bg_color); 1453#if 0 1454 /* 1455 * This clears the screen at startup. This is different from 1456 * the behavior of other versions of less. Disable it for now. 1457 */ 1458 char *blanks; 1459 int row; 1460 int col; 1461 1462 /* 1463 * Create a complete, blank screen using "normal" colors. 1464 */ 1465 SETCOLORS(nm_fg_color, nm_bg_color); 1466 blanks = (char *) ecalloc(width+1, sizeof(char)); 1467 for (col = 0; col < sc_width; col++) 1468 blanks[col] = ' '; 1469 blanks[sc_width] = '\0'; 1470 for (row = 0; row < sc_height; row++) 1471 _outtext(blanks); 1472 free(blanks); 1473#endif 1474} 1475#endif 1476 1477#if MSDOS_COMPILER==WIN32C 1478 1479/* 1480 * Termcap-like init with a private win32 console. 1481 */ 1482 static void 1483win32_init_term() 1484{ 1485 CONSOLE_SCREEN_BUFFER_INFO scr; 1486 COORD size; 1487 1488 if (con_out_save == INVALID_HANDLE_VALUE) 1489 return; 1490 1491 GetConsoleScreenBufferInfo(con_out_save, &scr); 1492 1493 if (con_out_ours == INVALID_HANDLE_VALUE) 1494 { 1495 /* 1496 * Create our own screen buffer, so that we 1497 * may restore the original when done. 1498 */ 1499 con_out_ours = CreateConsoleScreenBuffer( 1500 GENERIC_WRITE | GENERIC_READ, 1501 FILE_SHARE_WRITE | FILE_SHARE_READ, 1502 (LPSECURITY_ATTRIBUTES) NULL, 1503 CONSOLE_TEXTMODE_BUFFER, 1504 (LPVOID) NULL); 1505 } 1506 1507 size.X = scr.srWindow.Right - scr.srWindow.Left + 1; 1508 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1; 1509 SetConsoleScreenBufferSize(con_out_ours, size); 1510 SetConsoleActiveScreenBuffer(con_out_ours); 1511 con_out = con_out_ours; 1512} 1513 1514/* 1515 * Restore the startup console. 1516 */ 1517static void 1518win32_deinit_term() 1519{ 1520 if (con_out_save == INVALID_HANDLE_VALUE) 1521 return; 1522 if (quitting) 1523 (void) CloseHandle(con_out_ours); 1524 SetConsoleActiveScreenBuffer(con_out_save); 1525 con_out = con_out_save; 1526} 1527 1528#endif 1529 1530/* 1531 * Initialize terminal 1532 */ 1533 public void 1534init() 1535{ 1536#if !MSDOS_COMPILER 1537 if (!no_init) 1538 tputs(sc_init, sc_height, putchr); 1539 if (!no_keypad) 1540 tputs(sc_s_keypad, sc_height, putchr); 1541 if (top_scroll) 1542 { 1543 int i; 1544 1545 /* 1546 * This is nice to terminals with no alternate screen, 1547 * but with saved scrolled-off-the-top lines. This way, 1548 * no previous line is lost, but we start with a whole 1549 * screen to ourself. 1550 */ 1551 for (i = 1; i < sc_height; i++) 1552 putchr('\n'); 1553 } else 1554 line_left(); 1555#else 1556#if MSDOS_COMPILER==WIN32C 1557 if (!no_init) 1558 win32_init_term(); 1559#endif 1560 initcolor(); 1561 flush(); 1562#endif 1563 init_done = 1; 1564} 1565 1566/* 1567 * Deinitialize terminal 1568 */ 1569 public void 1570deinit() 1571{ 1572 if (!init_done) 1573 return; 1574#if !MSDOS_COMPILER 1575 if (!no_keypad) 1576 tputs(sc_e_keypad, sc_height, putchr); 1577 if (!no_init) 1578 tputs(sc_deinit, sc_height, putchr); 1579#else 1580 /* Restore system colors. */ 1581 SETCOLORS(sy_fg_color, sy_bg_color); 1582#if MSDOS_COMPILER==WIN32C 1583 if (!no_init) 1584 win32_deinit_term(); 1585#else 1586 /* Need clreol to make SETCOLORS take effect. */ 1587 clreol(); 1588#endif 1589#endif 1590 init_done = 0; 1591} 1592 1593/* 1594 * Home cursor (move to upper left corner of screen). 1595 */ 1596 public void 1597home() 1598{ 1599#if !MSDOS_COMPILER 1600 tputs(sc_home, 1, putchr); 1601#else 1602 flush(); 1603 _settextposition(1,1); 1604#endif 1605} 1606 1607/* 1608 * Add a blank line (called with cursor at home). 1609 * Should scroll the display down. 1610 */ 1611 public void 1612add_line() 1613{ 1614#if !MSDOS_COMPILER 1615 tputs(sc_addline, sc_height, putchr); 1616#else 1617 flush(); 1618#if MSDOS_COMPILER==MSOFTC 1619 _scrolltextwindow(_GSCROLLDOWN); 1620 _settextposition(1,1); 1621#else 1622#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 1623 movetext(1,1, sc_width,sc_height-1, 1,2); 1624 gotoxy(1,1); 1625 clreol(); 1626#else 1627#if MSDOS_COMPILER==WIN32C 1628 { 1629 CHAR_INFO fillchar; 1630 SMALL_RECT rcSrc, rcClip; 1631 COORD new_org; 1632 CONSOLE_SCREEN_BUFFER_INFO csbi; 1633 1634 GetConsoleScreenBufferInfo(con_out,&csbi); 1635 1636 /* The clip rectangle is the entire visible screen. */ 1637 rcClip.Left = csbi.srWindow.Left; 1638 rcClip.Top = csbi.srWindow.Top; 1639 rcClip.Right = csbi.srWindow.Right; 1640 rcClip.Bottom = csbi.srWindow.Bottom; 1641 1642 /* The source rectangle is the visible screen minus the last line. */ 1643 rcSrc = rcClip; 1644 rcSrc.Bottom--; 1645 1646 /* Move the top left corner of the source window down one row. */ 1647 new_org.X = rcSrc.Left; 1648 new_org.Y = rcSrc.Top + 1; 1649 1650 /* Fill the right character and attributes. */ 1651 fillchar.Char.AsciiChar = ' '; 1652 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 1653 fillchar.Attributes = curr_attr; 1654 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); 1655 _settextposition(1,1); 1656 } 1657#endif 1658#endif 1659#endif 1660#endif 1661} 1662 1663#if 0 1664/* 1665 * Remove the n topmost lines and scroll everything below it in the 1666 * window upward. This is needed to stop leaking the topmost line 1667 * into the scrollback buffer when we go down-one-line (in WIN32). 1668 */ 1669 public void 1670remove_top(n) 1671 int n; 1672{ 1673#if MSDOS_COMPILER==WIN32C 1674 SMALL_RECT rcSrc, rcClip; 1675 CHAR_INFO fillchar; 1676 COORD new_org; 1677 CONSOLE_SCREEN_BUFFER_INFO csbi; /* to get buffer info */ 1678 1679 if (n >= sc_height - 1) 1680 { 1681 clear(); 1682 home(); 1683 return; 1684 } 1685 1686 flush(); 1687 1688 GetConsoleScreenBufferInfo(con_out, &csbi); 1689 1690 /* Get the extent of all-visible-rows-but-the-last. */ 1691 rcSrc.Left = csbi.srWindow.Left; 1692 rcSrc.Top = csbi.srWindow.Top + n; 1693 rcSrc.Right = csbi.srWindow.Right; 1694 rcSrc.Bottom = csbi.srWindow.Bottom; 1695 1696 /* Get the clip rectangle. */ 1697 rcClip.Left = rcSrc.Left; 1698 rcClip.Top = csbi.srWindow.Top; 1699 rcClip.Right = rcSrc.Right; 1700 rcClip.Bottom = rcSrc.Bottom ; 1701 1702 /* Move the source window up n rows. */ 1703 new_org.X = rcSrc.Left; 1704 new_org.Y = rcSrc.Top - n; 1705 1706 /* Fill the right character and attributes. */ 1707 fillchar.Char.AsciiChar = ' '; 1708 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 1709 fillchar.Attributes = curr_attr; 1710 1711 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); 1712 1713 /* Position cursor on first blank line. */ 1714 goto_line(sc_height - n - 1); 1715#endif 1716} 1717#endif 1718 1719#if MSDOS_COMPILER==WIN32C 1720/* 1721 * Clear the screen. 1722 */ 1723 static void 1724win32_clear() 1725{ 1726 /* 1727 * This will clear only the currently visible rows of the NT 1728 * console buffer, which means none of the precious scrollback 1729 * rows are touched making for faster scrolling. Note that, if 1730 * the window has fewer columns than the console buffer (i.e. 1731 * there is a horizontal scrollbar as well), the entire width 1732 * of the visible rows will be cleared. 1733 */ 1734 COORD topleft; 1735 DWORD nchars; 1736 DWORD winsz; 1737 CONSOLE_SCREEN_BUFFER_INFO csbi; 1738 1739 /* get the number of cells in the current buffer */ 1740 GetConsoleScreenBufferInfo(con_out, &csbi); 1741 winsz = csbi.dwSize.X * (csbi.srWindow.Bottom - csbi.srWindow.Top + 1); 1742 topleft.X = 0; 1743 topleft.Y = csbi.srWindow.Top; 1744 1745 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 1746 FillConsoleOutputCharacter(con_out, ' ', winsz, topleft, &nchars); 1747 FillConsoleOutputAttribute(con_out, curr_attr, winsz, topleft, &nchars); 1748} 1749 1750/* 1751 * Remove the n topmost lines and scroll everything below it in the 1752 * window upward. 1753 */ 1754 public void 1755win32_scroll_up(n) 1756 int n; 1757{ 1758 SMALL_RECT rcSrc, rcClip; 1759 CHAR_INFO fillchar; 1760 COORD topleft; 1761 COORD new_org; 1762 DWORD nchars; 1763 DWORD size; 1764 CONSOLE_SCREEN_BUFFER_INFO csbi; 1765 1766 if (n <= 0) 1767 return; 1768 1769 if (n >= sc_height - 1) 1770 { 1771 win32_clear(); 1772 _settextposition(1,1); 1773 return; 1774 } 1775 1776 /* Get the extent of what will remain visible after scrolling. */ 1777 GetConsoleScreenBufferInfo(con_out, &csbi); 1778 rcSrc.Left = csbi.srWindow.Left; 1779 rcSrc.Top = csbi.srWindow.Top + n; 1780 rcSrc.Right = csbi.srWindow.Right; 1781 rcSrc.Bottom = csbi.srWindow.Bottom; 1782 1783 /* Get the clip rectangle. */ 1784 rcClip.Left = rcSrc.Left; 1785 rcClip.Top = csbi.srWindow.Top; 1786 rcClip.Right = rcSrc.Right; 1787 rcClip.Bottom = rcSrc.Bottom ; 1788 1789 /* Move the source text to the top of the screen. */ 1790 new_org.X = rcSrc.Left; 1791 new_org.Y = rcClip.Top; 1792 1793 /* Fill the right character and attributes. */ 1794 fillchar.Char.AsciiChar = ' '; 1795 fillchar.Attributes = MAKEATTR(nm_fg_color, nm_bg_color); 1796 1797 /* Scroll the window. */ 1798 SetConsoleTextAttribute(con_out, fillchar.Attributes); 1799 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); 1800 1801 /* Clear remaining lines at bottom. */ 1802 topleft.X = csbi.dwCursorPosition.X; 1803 topleft.Y = rcSrc.Bottom - n; 1804 size = (n * csbi.dwSize.X) + (rcSrc.Right - topleft.X); 1805 FillConsoleOutputCharacter(con_out, ' ', size, topleft, 1806 &nchars); 1807 FillConsoleOutputAttribute(con_out, fillchar.Attributes, size, topleft, 1808 &nchars); 1809 SetConsoleTextAttribute(con_out, curr_attr); 1810 1811 /* Move cursor n lines up from where it was. */ 1812 csbi.dwCursorPosition.Y -= n; 1813 SetConsoleCursorPosition(con_out, csbi.dwCursorPosition); 1814} 1815#endif 1816 1817/* 1818 * Move cursor to lower left corner of screen. 1819 */ 1820 public void 1821lower_left() 1822{ 1823#if !MSDOS_COMPILER 1824 tputs(sc_lower_left, 1, putchr); 1825#else 1826 flush(); 1827 _settextposition(sc_height, 1); 1828#endif 1829} 1830 1831/* 1832 * Move cursor to left position of current line. 1833 */ 1834 public void 1835line_left() 1836{ 1837#if !MSDOS_COMPILER 1838 tputs(sc_return, 1, putchr); 1839#else 1840 int row; 1841 flush(); 1842#if MSDOS_COMPILER==WIN32C 1843 { 1844 CONSOLE_SCREEN_BUFFER_INFO scr; 1845 GetConsoleScreenBufferInfo(con_out, &scr); 1846 row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1; 1847 } 1848#else 1849#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 1850 row = wherey(); 1851#else 1852 { 1853 struct rccoord tpos = _gettextposition(); 1854 row = tpos.row; 1855 } 1856#endif 1857#endif 1858 _settextposition(row, 1); 1859#endif 1860} 1861 1862/* 1863 * Check if the console size has changed and reset internals 1864 * (in lieu of SIGWINCH for WIN32). 1865 */ 1866 public void 1867check_winch() 1868{ 1869#if MSDOS_COMPILER==WIN32C 1870 CONSOLE_SCREEN_BUFFER_INFO scr; 1871 COORD size; 1872 1873 if (con_out == INVALID_HANDLE_VALUE) 1874 return; 1875 1876 flush(); 1877 GetConsoleScreenBufferInfo(con_out, &scr); 1878 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1; 1879 size.X = scr.srWindow.Right - scr.srWindow.Left + 1; 1880 if (size.Y != sc_height || size.X != sc_width) 1881 { 1882 sc_height = size.Y; 1883 sc_width = size.X; 1884 if (!no_init && con_out_ours == con_out) 1885 SetConsoleScreenBufferSize(con_out, size); 1886 pos_init(); 1887 wscroll = (sc_height + 1) / 2; 1888 screen_trashed = 1; 1889 } 1890#endif 1891} 1892 1893/* 1894 * Goto a specific line on the screen. 1895 */ 1896 public void 1897goto_line(slinenum) 1898 int slinenum; 1899{ 1900#if !MSDOS_COMPILER 1901 tputs(tgoto(sc_move, 0, slinenum), 1, putchr); 1902#else 1903 flush(); 1904 _settextposition(slinenum+1, 1); 1905#endif 1906} 1907 1908#if MSDOS_COMPILER==MSOFTC || MSDOS_COMPILER==BORLANDC 1909/* 1910 * Create an alternate screen which is all white. 1911 * This screen is used to create a "flash" effect, by displaying it 1912 * briefly and then switching back to the normal screen. 1913 * {{ Yuck! There must be a better way to get a visual bell. }} 1914 */ 1915 static void 1916create_flash() 1917{ 1918#if MSDOS_COMPILER==MSOFTC 1919 struct videoconfig w; 1920 char *blanks; 1921 int row, col; 1922 1923 _getvideoconfig(&w); 1924 videopages = w.numvideopages; 1925 if (videopages < 2) 1926 { 1927 at_enter(AT_STANDOUT); 1928 at_exit(); 1929 } else 1930 { 1931 _setactivepage(1); 1932 at_enter(AT_STANDOUT); 1933 blanks = (char *) ecalloc(w.numtextcols, sizeof(char)); 1934 for (col = 0; col < w.numtextcols; col++) 1935 blanks[col] = ' '; 1936 for (row = w.numtextrows; row > 0; row--) 1937 _outmem(blanks, w.numtextcols); 1938 _setactivepage(0); 1939 _setvisualpage(0); 1940 free(blanks); 1941 at_exit(); 1942 } 1943#else 1944#if MSDOS_COMPILER==BORLANDC 1945 register int n; 1946 1947 whitescreen = (unsigned short *) 1948 malloc(sc_width * sc_height * sizeof(short)); 1949 if (whitescreen == NULL) 1950 return; 1951 for (n = 0; n < sc_width * sc_height; n++) 1952 whitescreen[n] = 0x7020; 1953#else 1954#if MSDOS_COMPILER==WIN32C 1955 register int n; 1956 1957 whitescreen = (WORD *) 1958 malloc(sc_height * sc_width * sizeof(WORD)); 1959 if (whitescreen == NULL) 1960 return; 1961 /* Invert the standard colors. */ 1962 for (n = 0; n < sc_width * sc_height; n++) 1963 whitescreen[n] = (WORD)((nm_fg_color << 4) | nm_bg_color); 1964#endif 1965#endif 1966#endif 1967 flash_created = 1; 1968} 1969#endif /* MSDOS_COMPILER */ 1970 1971/* 1972 * Output the "visual bell", if there is one. 1973 */ 1974 public void 1975vbell() 1976{ 1977#if !MSDOS_COMPILER 1978 if (*sc_visual_bell == '\0') 1979 return; 1980 tputs(sc_visual_bell, sc_height, putchr); 1981#else 1982#if MSDOS_COMPILER==DJGPPC 1983 ScreenVisualBell(); 1984#else 1985#if MSDOS_COMPILER==MSOFTC 1986 /* 1987 * Create a flash screen on the second video page. 1988 * Switch to that page, then switch back. 1989 */ 1990 if (!flash_created) 1991 create_flash(); 1992 if (videopages < 2) 1993 return; 1994 _setvisualpage(1); 1995 delay(100); 1996 _setvisualpage(0); 1997#else 1998#if MSDOS_COMPILER==BORLANDC 1999 unsigned short *currscreen; 2000 2001 /* 2002 * Get a copy of the current screen. 2003 * Display the flash screen. 2004 * Then restore the old screen. 2005 */ 2006 if (!flash_created) 2007 create_flash(); 2008 if (whitescreen == NULL) 2009 return; 2010 currscreen = (unsigned short *) 2011 malloc(sc_width * sc_height * sizeof(short)); 2012 if (currscreen == NULL) return; 2013 gettext(1, 1, sc_width, sc_height, currscreen); 2014 puttext(1, 1, sc_width, sc_height, whitescreen); 2015 delay(100); 2016 puttext(1, 1, sc_width, sc_height, currscreen); 2017 free(currscreen); 2018#else 2019#if MSDOS_COMPILER==WIN32C 2020 /* paint screen with an inverse color */ 2021 clear(); 2022 2023 /* leave it displayed for 100 msec. */ 2024 Sleep(100); 2025 2026 /* restore with a redraw */ 2027 repaint(); 2028#endif 2029#endif 2030#endif 2031#endif 2032#endif 2033} 2034 2035/* 2036 * Make a noise. 2037 */ 2038 static void 2039beep() 2040{ 2041#if !MSDOS_COMPILER 2042 putchr(CONTROL('G')); 2043#else 2044#if MSDOS_COMPILER==WIN32C 2045 MessageBeep(0); 2046#else 2047 write(1, "\7", 1); 2048#endif 2049#endif 2050} 2051 2052/* 2053 * Ring the terminal bell. 2054 */ 2055 public void 2056bell() 2057{ 2058 if (quiet == VERY_QUIET) 2059 vbell(); 2060 else 2061 beep(); 2062} 2063 2064/* 2065 * Clear the screen. 2066 */ 2067 public void 2068clear() 2069{ 2070#if !MSDOS_COMPILER 2071 tputs(sc_clear, sc_height, putchr); 2072#else 2073 flush(); 2074#if MSDOS_COMPILER==WIN32C 2075 win32_clear(); 2076#else 2077 _clearscreen(_GCLEARSCREEN); 2078#endif 2079#endif 2080} 2081 2082/* 2083 * Clear from the cursor to the end of the cursor's line. 2084 * {{ This must not move the cursor. }} 2085 */ 2086 public void 2087clear_eol() 2088{ 2089#if !MSDOS_COMPILER 2090 tputs(sc_eol_clear, 1, putchr); 2091#else 2092#if MSDOS_COMPILER==MSOFTC 2093 short top, left; 2094 short bot, right; 2095 struct rccoord tpos; 2096 2097 flush(); 2098 /* 2099 * Save current state. 2100 */ 2101 tpos = _gettextposition(); 2102 _gettextwindow(&top, &left, &bot, &right); 2103 /* 2104 * Set a temporary window to the current line, 2105 * from the cursor's position to the right edge of the screen. 2106 * Then clear that window. 2107 */ 2108 _settextwindow(tpos.row, tpos.col, tpos.row, sc_width); 2109 _clearscreen(_GWINDOW); 2110 /* 2111 * Restore state. 2112 */ 2113 _settextwindow(top, left, bot, right); 2114 _settextposition(tpos.row, tpos.col); 2115#else 2116#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 2117 flush(); 2118 clreol(); 2119#else 2120#if MSDOS_COMPILER==WIN32C 2121 DWORD nchars; 2122 COORD cpos; 2123 CONSOLE_SCREEN_BUFFER_INFO scr; 2124 2125 flush(); 2126 memset(&scr, 0, sizeof(scr)); 2127 GetConsoleScreenBufferInfo(con_out, &scr); 2128 cpos.X = scr.dwCursorPosition.X; 2129 cpos.Y = scr.dwCursorPosition.Y; 2130 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 2131 FillConsoleOutputAttribute(con_out, curr_attr, 2132 scr.dwSize.X - cpos.X, cpos, &nchars); 2133 FillConsoleOutputCharacter(con_out, ' ', 2134 scr.dwSize.X - cpos.X, cpos, &nchars); 2135#endif 2136#endif 2137#endif 2138#endif 2139} 2140 2141/* 2142 * Clear the current line. 2143 * Clear the screen if there's off-screen memory below the display. 2144 */ 2145 static void 2146clear_eol_bot() 2147{ 2148#if MSDOS_COMPILER 2149 clear_eol(); 2150#else 2151 if (below_mem) 2152 tputs(sc_eos_clear, 1, putchr); 2153 else 2154 tputs(sc_eol_clear, 1, putchr); 2155#endif 2156} 2157 2158/* 2159 * Clear the bottom line of the display. 2160 * Leave the cursor at the beginning of the bottom line. 2161 */ 2162 public void 2163clear_bot() 2164{ 2165 /* 2166 * If we're in a non-normal attribute mode, temporarily exit 2167 * the mode while we do the clear. Some terminals fill the 2168 * cleared area with the current attribute. 2169 */ 2170 if (oldbot) 2171 lower_left(); 2172 else 2173 line_left(); 2174 2175 if (attrmode == AT_NORMAL) 2176 clear_eol_bot(); 2177 else 2178 { 2179 int saved_attrmode = attrmode; 2180 2181 at_exit(); 2182 clear_eol_bot(); 2183 at_enter(saved_attrmode); 2184 } 2185} 2186 2187 public void 2188at_enter(attr) 2189 int attr; 2190{ 2191 attr = apply_at_specials(attr); 2192 2193#if !MSDOS_COMPILER 2194 /* The one with the most priority is last. */ 2195 if (attr & AT_UNDERLINE) 2196 tputs(sc_u_in, 1, putchr); 2197 if (attr & AT_BOLD) 2198 tputs(sc_b_in, 1, putchr); 2199 if (attr & AT_BLINK) 2200 tputs(sc_bl_in, 1, putchr); 2201 if (attr & AT_STANDOUT) 2202 tputs(sc_s_in, 1, putchr); 2203#else 2204 flush(); 2205 /* The one with the most priority is first. */ 2206 if (attr & AT_STANDOUT) 2207 { 2208 SETCOLORS(so_fg_color, so_bg_color); 2209 } else if (attr & AT_BLINK) 2210 { 2211 SETCOLORS(bl_fg_color, bl_bg_color); 2212 } 2213 else if (attr & AT_BOLD) 2214 { 2215 SETCOLORS(bo_fg_color, bo_bg_color); 2216 } 2217 else if (attr & AT_UNDERLINE) 2218 { 2219 SETCOLORS(ul_fg_color, ul_bg_color); 2220 } 2221#endif 2222 2223 attrmode = attr; 2224} 2225 2226 public void 2227at_exit() 2228{ 2229#if !MSDOS_COMPILER 2230 /* Undo things in the reverse order we did them. */ 2231 if (attrmode & AT_STANDOUT) 2232 tputs(sc_s_out, 1, putchr); 2233 if (attrmode & AT_BLINK) 2234 tputs(sc_bl_out, 1, putchr); 2235 if (attrmode & AT_BOLD) 2236 tputs(sc_b_out, 1, putchr); 2237 if (attrmode & AT_UNDERLINE) 2238 tputs(sc_u_out, 1, putchr); 2239#else 2240 flush(); 2241 SETCOLORS(nm_fg_color, nm_bg_color); 2242#endif 2243 2244 attrmode = AT_NORMAL; 2245} 2246 2247 public void 2248at_switch(attr) 2249 int attr; 2250{ 2251 int new_attrmode = apply_at_specials(attr); 2252 int ignore_modes = AT_ANSI; 2253 2254 if ((new_attrmode & ~ignore_modes) != (attrmode & ~ignore_modes)) 2255 { 2256 at_exit(); 2257 at_enter(attr); 2258 } 2259} 2260 2261 public int 2262is_at_equiv(attr1, attr2) 2263 int attr1; 2264 int attr2; 2265{ 2266 attr1 = apply_at_specials(attr1); 2267 attr2 = apply_at_specials(attr2); 2268 2269 return (attr1 == attr2); 2270} 2271 2272 public int 2273apply_at_specials(attr) 2274 int attr; 2275{ 2276 if (attr & AT_BINARY) 2277 attr |= binattr; 2278 if (attr & AT_HILITE) 2279 attr |= AT_STANDOUT; 2280 attr &= ~(AT_BINARY|AT_HILITE); 2281 2282 return attr; 2283} 2284 2285#if 0 /* No longer used */ 2286/* 2287 * Erase the character to the left of the cursor 2288 * and move the cursor left. 2289 */ 2290 public void 2291backspace() 2292{ 2293#if !MSDOS_COMPILER 2294 /* 2295 * Erase the previous character by overstriking with a space. 2296 */ 2297 tputs(sc_backspace, 1, putchr); 2298 putchr(' '); 2299 tputs(sc_backspace, 1, putchr); 2300#else 2301#if MSDOS_COMPILER==MSOFTC 2302 struct rccoord tpos; 2303 2304 flush(); 2305 tpos = _gettextposition(); 2306 if (tpos.col <= 1) 2307 return; 2308 _settextposition(tpos.row, tpos.col-1); 2309 _outtext(" "); 2310 _settextposition(tpos.row, tpos.col-1); 2311#else 2312#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 2313 cputs("\b"); 2314#else 2315#if MSDOS_COMPILER==WIN32C 2316 COORD cpos; 2317 DWORD cChars; 2318 CONSOLE_SCREEN_BUFFER_INFO scr; 2319 2320 flush(); 2321 GetConsoleScreenBufferInfo(con_out, &scr); 2322 cpos = scr.dwCursorPosition; 2323 if (cpos.X <= 0) 2324 return; 2325 cpos.X--; 2326 SetConsoleCursorPosition(con_out, cpos); 2327 FillConsoleOutputCharacter(con_out, (TCHAR)' ', 1, cpos, &cChars); 2328 SetConsoleCursorPosition(con_out, cpos); 2329#endif 2330#endif 2331#endif 2332#endif 2333} 2334#endif /* 0 */ 2335 2336/* 2337 * Output a plain backspace, without erasing the previous char. 2338 */ 2339 public void 2340putbs() 2341{ 2342#if !MSDOS_COMPILER 2343 tputs(sc_backspace, 1, putchr); 2344#else 2345 int row, col; 2346 2347 flush(); 2348 { 2349#if MSDOS_COMPILER==MSOFTC 2350 struct rccoord tpos; 2351 tpos = _gettextposition(); 2352 row = tpos.row; 2353 col = tpos.col; 2354#else 2355#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 2356 row = wherey(); 2357 col = wherex(); 2358#else 2359#if MSDOS_COMPILER==WIN32C 2360 CONSOLE_SCREEN_BUFFER_INFO scr; 2361 GetConsoleScreenBufferInfo(con_out, &scr); 2362 row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1; 2363 col = scr.dwCursorPosition.X - scr.srWindow.Left + 1; 2364#endif 2365#endif 2366#endif 2367 } 2368 if (col <= 1) 2369 return; 2370 _settextposition(row, col-1); 2371#endif /* MSDOS_COMPILER */ 2372} 2373 2374#if MSDOS_COMPILER==WIN32C 2375/* 2376 * Determine whether an input character is waiting to be read. 2377 */ 2378 static int 2379win32_kbhit(tty) 2380 HANDLE tty; 2381{ 2382 INPUT_RECORD ip; 2383 DWORD read; 2384 2385 if (keyCount > 0) 2386 return (TRUE); 2387 2388 currentKey.ascii = 0; 2389 currentKey.scan = 0; 2390 2391 /* 2392 * Wait for a real key-down event, but 2393 * ignore SHIFT and CONTROL key events. 2394 */ 2395 do 2396 { 2397 PeekConsoleInput(tty, &ip, 1, &read); 2398 if (read == 0) 2399 return (FALSE); 2400 ReadConsoleInput(tty, &ip, 1, &read); 2401 } while (ip.EventType != KEY_EVENT || 2402 ip.Event.KeyEvent.bKeyDown != TRUE || 2403 ip.Event.KeyEvent.wVirtualScanCode == 0 || 2404 ip.Event.KeyEvent.wVirtualKeyCode == VK_SHIFT || 2405 ip.Event.KeyEvent.wVirtualKeyCode == VK_CONTROL || 2406 ip.Event.KeyEvent.wVirtualKeyCode == VK_MENU); 2407 2408 currentKey.ascii = ip.Event.KeyEvent.uChar.AsciiChar; 2409 currentKey.scan = ip.Event.KeyEvent.wVirtualScanCode; 2410 keyCount = ip.Event.KeyEvent.wRepeatCount; 2411 2412 if (ip.Event.KeyEvent.dwControlKeyState & 2413 (LEFT_ALT_PRESSED | RIGHT_ALT_PRESSED)) 2414 { 2415 switch (currentKey.scan) 2416 { 2417 case PCK_ALT_E: /* letter 'E' */ 2418 currentKey.ascii = 0; 2419 break; 2420 } 2421 } else if (ip.Event.KeyEvent.dwControlKeyState & 2422 (LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED)) 2423 { 2424 switch (currentKey.scan) 2425 { 2426 case PCK_RIGHT: /* right arrow */ 2427 currentKey.scan = PCK_CTL_RIGHT; 2428 break; 2429 case PCK_LEFT: /* left arrow */ 2430 currentKey.scan = PCK_CTL_LEFT; 2431 break; 2432 case PCK_DELETE: /* delete */ 2433 currentKey.scan = PCK_CTL_DELETE; 2434 break; 2435 } 2436 } 2437 return (TRUE); 2438} 2439 2440/* 2441 * Read a character from the keyboard. 2442 */ 2443 public char 2444WIN32getch(tty) 2445 int tty; 2446{ 2447 int ascii; 2448 2449 if (pending_scancode) 2450 { 2451 pending_scancode = 0; 2452 return ((char)(currentKey.scan & 0x00FF)); 2453 } 2454 2455 while (win32_kbhit((HANDLE)tty) == FALSE) 2456 { 2457 Sleep(20); 2458 if (ABORT_SIGS()) 2459 return ('\003'); 2460 continue; 2461 } 2462 keyCount --; 2463 ascii = currentKey.ascii; 2464 /* 2465 * On PC's, the extended keys return a 2 byte sequence beginning 2466 * with '00', so if the ascii code is 00, the next byte will be 2467 * the lsb of the scan code. 2468 */ 2469 pending_scancode = (ascii == 0x00); 2470 return ((char)ascii); 2471} 2472#endif 2473 2474#if MSDOS_COMPILER 2475/* 2476 */ 2477 public void 2478WIN32setcolors(fg, bg) 2479 int fg; 2480 int bg; 2481{ 2482 SETCOLORS(fg, bg); 2483} 2484 2485/* 2486 */ 2487 public void 2488WIN32textout(text, len) 2489 char *text; 2490 int len; 2491{ 2492#if MSDOS_COMPILER==WIN32C 2493 DWORD written; 2494 WriteConsole(con_out, text, len, &written, NULL); 2495#else 2496 char c = text[len]; 2497 text[len] = '\0'; 2498 cputs(text); 2499 text[len] = c; 2500#endif 2501} 2502#endif 2503