screen.c revision 60812
1/* $FreeBSD: head/contrib/less/screen.c 60812 2000-05-23 05:51:17Z ps $ */ 2/* 3 * Copyright (C) 1984-2000 Mark Nudelman 4 * 5 * You may distribute under the terms of either the GNU General Public 6 * License or the Less License, as specified in the README file. 7 * 8 * For more information about less, or for information on how to 9 * contact the author, see the README file. 10 */ 11 12 13/* 14 * Routines which deal with the characteristics of the terminal. 15 * Uses termcap to be as terminal-independent as possible. 16 */ 17 18#include "less.h" 19#include "cmd.h" 20 21#if MSDOS_COMPILER 22#include "pckeys.h" 23#if MSDOS_COMPILER==MSOFTC 24#include <graph.h> 25#else 26#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 27#include <conio.h> 28#if MSDOS_COMPILER==DJGPPC 29#include <pc.h> 30extern int fd0; 31#endif 32#else 33#if MSDOS_COMPILER==WIN32C 34#include <windows.h> 35#endif 36#endif 37#endif 38#include <time.h> 39 40#else 41 42#if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS 43#include <termios.h> 44#if HAVE_SYS_IOCTL_H && !defined(TIOCGWINSZ) 45#include <sys/ioctl.h> 46#endif 47#else 48#if HAVE_TERMIO_H 49#include <termio.h> 50#else 51#if HAVE_SGSTAT_H 52#include <sgstat.h> 53#else 54#include <sgtty.h> 55#endif 56#if HAVE_SYS_IOCTL_H && (defined(TIOCGWINSZ) || defined(TCGETA) || defined(TIOCGETP) || defined(WIOCGETD)) 57#include <sys/ioctl.h> 58#endif 59#endif 60#endif 61 62#if HAVE_TERMCAP_H 63#include <termcap.h> 64#endif 65#ifdef _OSK 66#include <signal.h> 67#endif 68#if OS2 69#include <sys/signal.h> 70#endif 71#if HAVE_SYS_STREAM_H 72#include <sys/stream.h> 73#endif 74#if HAVE_SYS_PTEM_H 75#include <sys/ptem.h> 76#endif 77 78#endif /* MSDOS_COMPILER */ 79 80/* 81 * Check for broken termios package that forces you to manually 82 * set the line discipline. 83 */ 84#ifdef __ultrix__ 85#define MUST_SET_LINE_DISCIPLINE 1 86#else 87#define MUST_SET_LINE_DISCIPLINE 0 88#endif 89 90#if OS2 91#define DEFAULT_TERM "ansi" 92#else 93#define DEFAULT_TERM "unknown" 94#endif 95 96#if MSDOS_COMPILER==MSOFTC 97static int videopages; 98static long msec_loops; 99static int flash_created = 0; 100#define SETCOLORS(fg,bg) { _settextcolor(fg); _setbkcolor(bg); } 101#endif 102 103#if MSDOS_COMPILER==BORLANDC 104static unsigned short *whitescreen; 105static int flash_created = 0; 106#endif 107#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 108#define _settextposition(y,x) gotoxy(x,y) 109#define _clearscreen(m) clrscr() 110#define _outtext(s) cputs(s) 111#define SETCOLORS(fg,bg) { textcolor(fg); textbackground(bg); } 112extern int sc_height; 113#endif 114 115#if MSDOS_COMPILER==WIN32C 116struct keyRecord 117{ 118 int ascii; 119 int scan; 120} currentKey; 121 122static int keyCount = 0; 123static WORD curr_attr; 124static int pending_scancode = 0; 125static WORD *whitescreen; 126 127static HANDLE con_out_save = INVALID_HANDLE_VALUE; /* previous console */ 128static HANDLE con_out_ours = INVALID_HANDLE_VALUE; /* our own */ 129HANDLE con_out = INVALID_HANDLE_VALUE; /* current console */ 130 131extern int quitting; 132static void win32_init_term(); 133static void win32_deinit_term(); 134 135#define FG_COLORS (FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_INTENSITY) 136#define BG_COLORS (BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE | BACKGROUND_INTENSITY) 137#define MAKEATTR(fg,bg) ((WORD)((fg)|((bg)<<4))) 138#define SETCOLORS(fg,bg) { curr_attr = MAKEATTR(fg,bg); \ 139 if (SetConsoleTextAttribute(con_out, curr_attr) == 0) \ 140 error("SETCOLORS failed"); } 141#endif 142 143#if MSDOS_COMPILER 144public int nm_fg_color; /* Color of normal text */ 145public int nm_bg_color; 146public int bo_fg_color; /* Color of bold text */ 147public int bo_bg_color; 148public int ul_fg_color; /* Color of underlined text */ 149public int ul_bg_color; 150public int so_fg_color; /* Color of standout text */ 151public int so_bg_color; 152public int bl_fg_color; /* Color of blinking text */ 153public int bl_bg_color; 154static int sy_fg_color; /* Color of system text (before less) */ 155static int sy_bg_color; 156 157#else 158 159/* 160 * Strings passed to tputs() to do various terminal functions. 161 */ 162static char 163 *sc_pad, /* Pad string */ 164 *sc_home, /* Cursor home */ 165 *sc_addline, /* Add line, scroll down following lines */ 166 *sc_lower_left, /* Cursor to last line, first column */ 167 *sc_move, /* General cursor positioning */ 168 *sc_clear, /* Clear screen */ 169 *sc_eol_clear, /* Clear to end of line */ 170 *sc_eos_clear, /* Clear to end of screen */ 171 *sc_s_in, /* Enter standout (highlighted) mode */ 172 *sc_s_out, /* Exit standout mode */ 173 *sc_u_in, /* Enter underline mode */ 174 *sc_u_out, /* Exit underline mode */ 175 *sc_b_in, /* Enter bold mode */ 176 *sc_b_out, /* Exit bold mode */ 177 *sc_bl_in, /* Enter blink mode */ 178 *sc_bl_out, /* Exit blink mode */ 179 *sc_visual_bell, /* Visual bell (flash screen) sequence */ 180 *sc_backspace, /* Backspace cursor */ 181 *sc_s_keypad, /* Start keypad mode */ 182 *sc_e_keypad, /* End keypad mode */ 183 *sc_init, /* Startup terminal initialization */ 184 *sc_deinit; /* Exit terminal de-initialization */ 185#endif 186 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, kill_char; /* The user's erase and line-kill chars */ 192public int werase_char; /* The user's word-erase char */ 193public int sc_width, sc_height; /* Height & width of screen */ 194public int bo_s_width, bo_e_width; /* Printing width of boldface seq */ 195public int ul_s_width, ul_e_width; /* Printing width of underline seq */ 196public int so_s_width, so_e_width; /* Printing width of standout seq */ 197public int bl_s_width, bl_e_width; /* Printing width of blink seq */ 198public int above_mem, below_mem; /* Memory retained above/below screen */ 199public int can_goto_line; /* Can move cursor to any line */ 200public int clear_bg; /* Clear fills with background color */ 201public int missing_cap = 0; /* Some capability is missing */ 202 203static int attrmode = AT_NORMAL; 204 205#if !MSDOS_COMPILER 206static char *cheaper(); 207static void tmodes(); 208#endif 209 210/* 211 * These two variables are sometimes defined in, 212 * and needed by, the termcap library. 213 */ 214#if MUST_DEFINE_OSPEED 215extern short ospeed; /* Terminal output baud rate */ 216extern char PC; /* Pad character */ 217#endif 218#ifdef _OSK 219short ospeed; 220char PC_, *UP, *BC; 221#endif 222 223extern int quiet; /* If VERY_QUIET, use visual bell for bell */ 224extern int no_back_scroll; 225extern int swindow; 226extern int no_init; 227extern int quit_at_eof; 228extern int more_mode; 229extern int sigs; 230extern int wscroll; 231extern int screen_trashed; 232#if HILITE_SEARCH 233extern int hilite_search; 234#endif 235 236extern char *tgetstr(); 237extern char *tgoto(); 238 239 240/* 241 * Change terminal to "raw mode", or restore to "normal" mode. 242 * "Raw mode" means 243 * 1. An outstanding read will complete on receipt of a single keystroke. 244 * 2. Input is not echoed. 245 * 3. On output, \n is mapped to \r\n. 246 * 4. \t is NOT expanded into spaces. 247 * 5. Signal-causing characters such as ctrl-C (interrupt), 248 * etc. are NOT disabled. 249 * It doesn't matter whether an input \n is mapped to \r, or vice versa. 250 */ 251 public void 252raw_mode(on) 253 int on; 254{ 255 static int curr_on = 0; 256 257 if (on == curr_on) 258 return; 259#if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS 260 { 261 struct termios s; 262 static struct termios save_term; 263 static int saved_term = 0; 264 265 if (on) 266 { 267 /* 268 * Get terminal modes. 269 */ 270 tcgetattr(2, &s); 271 272 /* 273 * Save modes and set certain variables dependent on modes. 274 */ 275 if (!saved_term) 276 { 277 save_term = s; 278 saved_term = 1; 279 } 280#if HAVE_OSPEED 281 switch (cfgetospeed(&s)) 282 { 283#ifdef B0 284 case B0: ospeed = 0; break; 285#endif 286#ifdef B50 287 case B50: ospeed = 1; break; 288#endif 289#ifdef B75 290 case B75: ospeed = 2; break; 291#endif 292#ifdef B110 293 case B110: ospeed = 3; break; 294#endif 295#ifdef B134 296 case B134: ospeed = 4; break; 297#endif 298#ifdef B150 299 case B150: ospeed = 5; break; 300#endif 301#ifdef B200 302 case B200: ospeed = 6; break; 303#endif 304#ifdef B300 305 case B300: ospeed = 7; break; 306#endif 307#ifdef B600 308 case B600: ospeed = 8; break; 309#endif 310#ifdef B1200 311 case B1200: ospeed = 9; break; 312#endif 313#ifdef B1800 314 case B1800: ospeed = 10; break; 315#endif 316#ifdef B2400 317 case B2400: ospeed = 11; break; 318#endif 319#ifdef B4800 320 case B4800: ospeed = 12; break; 321#endif 322#ifdef B9600 323 case B9600: ospeed = 13; break; 324#endif 325#ifdef EXTA 326 case EXTA: ospeed = 14; break; 327#endif 328#ifdef EXTB 329 case EXTB: ospeed = 15; break; 330#endif 331#ifdef B57600 332 case B57600: ospeed = 16; break; 333#endif 334#ifdef B115200 335 case B115200: ospeed = 17; break; 336#endif 337 default: ; 338 } 339#endif 340 erase_char = s.c_cc[VERASE]; 341 kill_char = s.c_cc[VKILL]; 342#ifdef VWERASE 343 werase_char = s.c_cc[VWERASE]; 344#else 345 werase_char = CONTROL('W'); 346#endif 347 348 /* 349 * Set the modes to the way we want them. 350 */ 351 s.c_lflag &= ~(0 352#ifdef ICANON 353 | ICANON 354#endif 355#ifdef ECHO 356 | ECHO 357#endif 358#ifdef ECHOE 359 | ECHOE 360#endif 361#ifdef ECHOK 362 | ECHOK 363#endif 364#if ECHONL 365 | ECHONL 366#endif 367 ); 368 369 s.c_oflag |= (0 370#ifdef OXTABS 371 | OXTABS 372#else 373#ifdef TAB3 374 | TAB3 375#else 376#ifdef XTABS 377 | XTABS 378#endif 379#endif 380#endif 381#ifdef OPOST 382 | OPOST 383#endif 384#ifdef ONLCR 385 | ONLCR 386#endif 387 ); 388 389 s.c_oflag &= ~(0 390#ifdef ONOEOT 391 | ONOEOT 392#endif 393#ifdef OCRNL 394 | OCRNL 395#endif 396#ifdef ONOCR 397 | ONOCR 398#endif 399#ifdef ONLRET 400 | ONLRET 401#endif 402 ); 403 s.c_cc[VMIN] = 1; 404 s.c_cc[VTIME] = 0; 405#ifdef VLNEXT 406 s.c_cc[VLNEXT] = 0; 407#endif 408#ifdef VDSUSP 409 s.c_cc[VDSUSP] = 0; 410#endif 411#if MUST_SET_LINE_DISCIPLINE 412 /* 413 * System's termios is broken; need to explicitly 414 * request TERMIODISC line discipline. 415 */ 416 s.c_line = TERMIODISC; 417#endif 418 } else 419 { 420 /* 421 * Restore saved modes. 422 */ 423 s = save_term; 424 } 425 tcsetattr(2, TCSADRAIN, &s); 426#if MUST_SET_LINE_DISCIPLINE 427 if (!on) 428 { 429 /* 430 * Broken termios *ignores* any line discipline 431 * except TERMIODISC. A different old line discipline 432 * is therefore not restored, yet. Restore the old 433 * line discipline by hand. 434 */ 435 ioctl(2, TIOCSETD, &save_term.c_line); 436 } 437#endif 438 } 439#else 440#ifdef TCGETA 441 { 442 struct termio s; 443 static struct termio save_term; 444 static int saved_term = 0; 445 446 if (on) 447 { 448 /* 449 * Get terminal modes. 450 */ 451 ioctl(2, TCGETA, &s); 452 453 /* 454 * Save modes and set certain variables dependent on modes. 455 */ 456 if (!saved_term) 457 { 458 save_term = s; 459 saved_term = 1; 460 } 461#if HAVE_OSPEED 462 ospeed = s.c_cflag & CBAUD; 463#endif 464 erase_char = s.c_cc[VERASE]; 465 kill_char = s.c_cc[VKILL]; 466#ifdef VWERASE 467 werase_char = s.c_cc[VWERASE]; 468#else 469 werase_char = CONTROL('W'); 470#endif 471 472 /* 473 * Set the modes to the way we want them. 474 */ 475 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL); 476 s.c_oflag |= (OPOST|ONLCR|TAB3); 477 s.c_oflag &= ~(OCRNL|ONOCR|ONLRET); 478 s.c_cc[VMIN] = 1; 479 s.c_cc[VTIME] = 0; 480 } else 481 { 482 /* 483 * Restore saved modes. 484 */ 485 s = save_term; 486 } 487 ioctl(2, TCSETAW, &s); 488 } 489#else 490#ifdef TIOCGETP 491 { 492 struct sgttyb s; 493 static struct sgttyb save_term; 494 static int saved_term = 0; 495 496 if (on) 497 { 498 /* 499 * Get terminal modes. 500 */ 501 ioctl(2, TIOCGETP, &s); 502 503 /* 504 * Save modes and set certain variables dependent on modes. 505 */ 506 if (!saved_term) 507 { 508 save_term = s; 509 saved_term = 1; 510 } 511#if HAVE_OSPEED 512 ospeed = s.sg_ospeed; 513#endif 514 erase_char = s.sg_erase; 515 kill_char = s.sg_kill; 516 werase_char = CONTROL('W'); 517 518 /* 519 * Set the modes to the way we want them. 520 */ 521 s.sg_flags |= CBREAK; 522 s.sg_flags &= ~(ECHO|XTABS); 523 } else 524 { 525 /* 526 * Restore saved modes. 527 */ 528 s = save_term; 529 } 530 ioctl(2, TIOCSETN, &s); 531 } 532#else 533#ifdef _OSK 534 { 535 struct sgbuf s; 536 static struct sgbuf save_term; 537 static int saved_term = 0; 538 539 if (on) 540 { 541 /* 542 * Get terminal modes. 543 */ 544 _gs_opt(2, &s); 545 546 /* 547 * Save modes and set certain variables dependent on modes. 548 */ 549 if (!saved_term) 550 { 551 save_term = s; 552 saved_term = 1; 553 } 554 erase_char = s.sg_bspch; 555 kill_char = s.sg_dlnch; 556 werase_char = CONTROL('W'); 557 558 /* 559 * Set the modes to the way we want them. 560 */ 561 s.sg_echo = 0; 562 s.sg_eofch = 0; 563 s.sg_pause = 0; 564 s.sg_psch = 0; 565 } else 566 { 567 /* 568 * Restore saved modes. 569 */ 570 s = save_term; 571 } 572 _ss_opt(2, &s); 573 } 574#else 575 /* MS-DOS, Windows, or OS2 */ 576#if OS2 577 /* OS2 */ 578 LSIGNAL(SIGINT, SIG_IGN); 579#endif 580 erase_char = '\b'; 581#if MSDOS_COMPILER==DJGPPC 582 kill_char = CONTROL('U'); 583 /* 584 * So that when we shell out or run another program, its 585 * stdin is in cooked mode. We do not switch stdin to binary 586 * mode if fd0 is zero, since that means we were called before 587 * tty was reopened in open_getchr, in which case we would be 588 * changing the original stdin device outside less. 589 */ 590 if (fd0 != 0) 591 setmode(0, on ? O_BINARY : O_TEXT); 592#else 593 kill_char = ESC; 594#endif 595 werase_char = CONTROL('W'); 596#endif 597#endif 598#endif 599#endif 600 curr_on = on; 601} 602 603#if !MSDOS_COMPILER 604/* 605 * Some glue to prevent calling termcap functions if tgetent() failed. 606 */ 607static int hardcopy; 608 609 static char * 610ltget_env(capname) 611 char *capname; 612{ 613 char name[16]; 614 615 strcpy(name, "LESS_TERMCAP_"); 616 strcat(name, capname); 617 return (lgetenv(name)); 618} 619 620 static int 621ltgetflag(capname) 622 char *capname; 623{ 624 char *s; 625 626 if ((s = ltget_env(capname)) != NULL) 627 return (*s != '\0' && *s != '0'); 628 if (hardcopy) 629 return (0); 630 return (tgetflag(capname)); 631} 632 633 static int 634ltgetnum(capname) 635 char *capname; 636{ 637 char *s; 638 639 if ((s = ltget_env(capname)) != NULL) 640 return (atoi(s)); 641 if (hardcopy) 642 return (-1); 643 return (tgetnum(capname)); 644} 645 646 static char * 647ltgetstr(capname, pp) 648 char *capname; 649 char **pp; 650{ 651 char *s; 652 653 if ((s = ltget_env(capname)) != NULL) 654 return (s); 655 if (hardcopy) 656 return (NULL); 657 return (tgetstr(capname, pp)); 658} 659#endif /* MSDOS_COMPILER */ 660 661/* 662 * Get size of the output screen. 663 */ 664 public void 665scrsize() 666{ 667 register char *s; 668 int sys_height; 669 int sys_width; 670#if !MSDOS_COMPILER 671 int n; 672#endif 673 674#define DEF_SC_WIDTH 80 675#if MSDOS_COMPILER 676#define DEF_SC_HEIGHT 25 677#else 678#define DEF_SC_HEIGHT 24 679#endif 680 681 682 sys_width = sys_height = 0; 683 684#if MSDOS_COMPILER==MSOFTC 685 { 686 struct videoconfig w; 687 _getvideoconfig(&w); 688 sys_height = w.numtextrows; 689 sys_width = w.numtextcols; 690 } 691#else 692#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 693 { 694 struct text_info w; 695 gettextinfo(&w); 696 sys_height = w.screenheight; 697 sys_width = w.screenwidth; 698 } 699#else 700#if MSDOS_COMPILER==WIN32C 701 { 702 CONSOLE_SCREEN_BUFFER_INFO scr; 703 GetConsoleScreenBufferInfo(con_out, &scr); 704 sys_height = scr.srWindow.Bottom - scr.srWindow.Top + 1; 705 sys_width = scr.srWindow.Right - scr.srWindow.Left + 1; 706 } 707#else 708#if OS2 709 { 710 int s[2]; 711 _scrsize(s); 712 sys_width = s[0]; 713 sys_height = s[1]; 714 } 715#else 716#ifdef TIOCGWINSZ 717 { 718 struct winsize w; 719 if (ioctl(2, TIOCGWINSZ, &w) == 0) 720 { 721 if (w.ws_row > 0) 722 sys_height = w.ws_row; 723 if (w.ws_col > 0) 724 sys_width = w.ws_col; 725 } 726 } 727#else 728#ifdef WIOCGETD 729 { 730 struct uwdata w; 731 if (ioctl(2, WIOCGETD, &w) == 0) 732 { 733 if (w.uw_height > 0) 734 sys_height = w.uw_height / w.uw_vs; 735 if (w.uw_width > 0) 736 sys_width = w.uw_width / w.uw_hs; 737 } 738 } 739#endif 740#endif 741#endif 742#endif 743#endif 744#endif 745 746 if (sys_height > 0) 747 sc_height = sys_height; 748 else if ((s = lgetenv("LINES")) != NULL) 749 sc_height = atoi(s); 750#if !MSDOS_COMPILER 751 else if ((n = ltgetnum("li")) > 0) 752 sc_height = n; 753#endif 754 else 755 sc_height = DEF_SC_HEIGHT; 756 757 if (sys_width > 0) 758 sc_width = sys_width; 759 else if ((s = lgetenv("COLUMNS")) != NULL) 760 sc_width = atoi(s); 761#if !MSDOS_COMPILER 762 else if ((n = ltgetnum("co")) > 0) 763 sc_width = n; 764#endif 765 else 766 sc_width = DEF_SC_WIDTH; 767} 768 769#if MSDOS_COMPILER==MSOFTC 770/* 771 * Figure out how many empty loops it takes to delay a millisecond. 772 */ 773 static void 774get_clock() 775{ 776 clock_t start; 777 778 /* 779 * Get synchronized at the start of a tick. 780 */ 781 start = clock(); 782 while (clock() == start) 783 ; 784 /* 785 * Now count loops till the next tick. 786 */ 787 start = clock(); 788 msec_loops = 0; 789 while (clock() == start) 790 msec_loops++; 791 /* 792 * Convert from (loops per clock) to (loops per millisecond). 793 */ 794 msec_loops *= CLOCKS_PER_SEC; 795 msec_loops /= 1000; 796} 797 798/* 799 * Delay for a specified number of milliseconds. 800 */ 801 static void 802dummy_func() 803{ 804 static long delay_dummy = 0; 805 delay_dummy++; 806} 807 808 static void 809delay(msec) 810 int msec; 811{ 812 long i; 813 814 while (msec-- > 0) 815 { 816 for (i = 0; i < msec_loops; i++) 817 { 818 /* 819 * Make it look like we're doing something here, 820 * so the optimizer doesn't remove the whole loop. 821 */ 822 dummy_func(); 823 } 824 } 825} 826#endif 827 828/* 829 * Return the characters actually input by a "special" key. 830 */ 831 public char * 832special_key_str(key) 833 int key; 834{ 835 static char tbuf[40]; 836 char *s; 837#if MSDOS_COMPILER 838 static char k_right[] = { '\340', PCK_RIGHT, 0 }; 839 static char k_left[] = { '\340', PCK_LEFT, 0 }; 840 static char k_ctl_right[] = { '\340', PCK_CTL_RIGHT, 0 }; 841 static char k_ctl_left[] = { '\340', PCK_CTL_LEFT, 0 }; 842 static char k_insert[] = { '\340', PCK_INSERT, 0 }; 843 static char k_delete[] = { '\340', PCK_DELETE, 0 }; 844 static char k_ctl_delete[] = { '\340', PCK_CTL_DELETE, 0 }; 845 static char k_ctl_backspace[] = { '\177', 0 }; 846 static char k_home[] = { '\340', PCK_HOME, 0 }; 847 static char k_end[] = { '\340', PCK_END, 0 }; 848 static char k_up[] = { '\340', PCK_UP, 0 }; 849 static char k_down[] = { '\340', PCK_DOWN, 0 }; 850 static char k_backtab[] = { '\340', PCK_SHIFT_TAB, 0 }; 851 static char k_pagedown[] = { '\340', PCK_PAGEDOWN, 0 }; 852 static char k_pageup[] = { '\340', PCK_PAGEUP, 0 }; 853 static char k_f1[] = { '\340', PCK_F1, 0 }; 854#else 855 char *sp = tbuf; 856#endif 857 858 switch (key) 859 { 860#if MSDOS_COMPILER 861 case SK_RIGHT_ARROW: 862 s = k_right; 863 break; 864 case SK_LEFT_ARROW: 865 s = k_left; 866 break; 867 case SK_UP_ARROW: 868 s = k_up; 869 break; 870 case SK_DOWN_ARROW: 871 s = k_down; 872 break; 873 case SK_PAGE_UP: 874 s = k_pageup; 875 break; 876 case SK_PAGE_DOWN: 877 s = k_pagedown; 878 break; 879 case SK_HOME: 880 s = k_home; 881 break; 882 case SK_END: 883 s = k_end; 884 break; 885 case SK_DELETE: 886 s = k_delete; 887 break; 888 case SK_INSERT: 889 s = k_insert; 890 break; 891 case SK_CTL_LEFT_ARROW: 892 s = k_ctl_left; 893 break; 894 case SK_CTL_RIGHT_ARROW: 895 s = k_ctl_right; 896 break; 897 case SK_CTL_BACKSPACE: 898 s = k_ctl_backspace; 899 break; 900 case SK_CTL_DELETE: 901 s = k_ctl_delete; 902 break; 903 case SK_F1: 904 s = k_f1; 905 break; 906 case SK_BACKTAB: 907 s = k_backtab; 908 break; 909#else 910 case SK_RIGHT_ARROW: 911 s = ltgetstr("kr", &sp); 912 break; 913 case SK_LEFT_ARROW: 914 s = ltgetstr("kl", &sp); 915 break; 916 case SK_UP_ARROW: 917 s = ltgetstr("ku", &sp); 918 break; 919 case SK_DOWN_ARROW: 920 s = ltgetstr("kd", &sp); 921 break; 922 case SK_PAGE_UP: 923 s = ltgetstr("kP", &sp); 924 break; 925 case SK_PAGE_DOWN: 926 s = ltgetstr("kN", &sp); 927 break; 928 case SK_HOME: 929 s = ltgetstr("kh", &sp); 930 break; 931 case SK_END: 932 s = ltgetstr("@7", &sp); 933 break; 934 case SK_DELETE: 935 s = ltgetstr("kD", &sp); 936 if (s == NULL) 937 { 938 tbuf[0] = '\177'; 939 tbuf[1] = '\0'; 940 s = tbuf; 941 } 942 break; 943#endif 944 case SK_CONTROL_K: 945 tbuf[0] = CONTROL('K'); 946 tbuf[1] = '\0'; 947 s = tbuf; 948 break; 949 default: 950 return (NULL); 951 } 952 return (s); 953} 954 955/* 956 * Get terminal capabilities via termcap. 957 */ 958 public void 959get_term() 960{ 961#if MSDOS_COMPILER 962 auto_wrap = 1; 963 ignaw = 0; 964 can_goto_line = 1; 965 clear_bg = 1; 966 /* 967 * Set up default colors. 968 * The xx_s_width and xx_e_width vars are already initialized to 0. 969 */ 970#if MSDOS_COMPILER==MSOFTC 971 sy_bg_color = _getbkcolor(); 972 sy_fg_color = _gettextcolor(); 973 get_clock(); 974#else 975#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 976 { 977 struct text_info w; 978 gettextinfo(&w); 979 sy_bg_color = (w.attribute >> 4) & 0x0F; 980 sy_fg_color = (w.attribute >> 0) & 0x0F; 981 } 982#else 983#if MSDOS_COMPILER==WIN32C 984 { 985 DWORD nread; 986 CONSOLE_SCREEN_BUFFER_INFO scr; 987 988 con_out_save = con_out = GetStdHandle(STD_OUTPUT_HANDLE); 989 /* 990 * Always open stdin in binary. Note this *must* be done 991 * before any file operations have been done on fd0. 992 */ 993 SET_BINARY(0); 994 GetConsoleScreenBufferInfo(con_out, &scr); 995 ReadConsoleOutputAttribute(con_out, &curr_attr, 996 1, scr.dwCursorPosition, &nread); 997 sy_bg_color = (curr_attr & BG_COLORS) >> 4; /* normalize */ 998 sy_fg_color = curr_attr & FG_COLORS; 999 } 1000#endif 1001#endif 1002#endif 1003 nm_fg_color = sy_fg_color; 1004 nm_bg_color = sy_bg_color; 1005 bo_fg_color = 11; 1006 bo_bg_color = 0; 1007 ul_fg_color = 9; 1008 ul_bg_color = 0; 1009 so_fg_color = 15; 1010 so_bg_color = 9; 1011 bl_fg_color = 15; 1012 bl_bg_color = 0; 1013 1014 /* 1015 * Get size of the screen. 1016 */ 1017 scrsize(); 1018 pos_init(); 1019 1020 1021#else /* !MSDOS_COMPILER */ 1022 1023 char *sp; 1024 register char *t1, *t2; 1025 char *term; 1026 char termbuf[TERMBUF_SIZE]; 1027 1028 static char sbuf[TERMSBUF_SIZE]; 1029 1030#if OS2 1031 /* 1032 * Make sure the termcap database is available. 1033 */ 1034 sp = lgetenv("TERMCAP"); 1035 if (sp == NULL || *sp == '\0') 1036 { 1037 char *termcap; 1038 if ((sp = homefile("termcap.dat")) != NULL) 1039 { 1040 termcap = (char *) ecalloc(strlen(sp)+9, sizeof(char)); 1041 sprintf(termcap, "TERMCAP=%s", sp); 1042 free(sp); 1043 putenv(termcap); 1044 } 1045 } 1046#endif 1047 /* 1048 * Find out what kind of terminal this is. 1049 */ 1050 if ((term = lgetenv("TERM")) == NULL) 1051 term = DEFAULT_TERM; 1052 hardcopy = 0; 1053 if (tgetent(termbuf, term) <= 0) 1054 hardcopy = 1; 1055 if (ltgetflag("hc")) 1056 hardcopy = 1; 1057 1058 /* 1059 * Get size of the screen. 1060 */ 1061 scrsize(); 1062 pos_init(); 1063 1064 auto_wrap = ltgetflag("am"); 1065 ignaw = ltgetflag("xn"); 1066 above_mem = ltgetflag("da"); 1067 below_mem = ltgetflag("db"); 1068 clear_bg = ltgetflag("ut"); 1069 1070 /* 1071 * Assumes termcap variable "sg" is the printing width of: 1072 * the standout sequence, the end standout sequence, 1073 * the underline sequence, the end underline sequence, 1074 * the boldface sequence, and the end boldface sequence. 1075 */ 1076 if ((so_s_width = ltgetnum("sg")) < 0) 1077 so_s_width = 0; 1078 so_e_width = so_s_width; 1079 1080 bo_s_width = bo_e_width = so_s_width; 1081 ul_s_width = ul_e_width = so_s_width; 1082 bl_s_width = bl_e_width = so_s_width; 1083 1084#if HILITE_SEARCH 1085 if (so_s_width > 0 || so_e_width > 0) 1086 /* 1087 * Disable highlighting by default on magic cookie terminals. 1088 * Turning on highlighting might change the displayed width 1089 * of a line, causing the display to get messed up. 1090 * The user can turn it back on with -g, 1091 * but she won't like the results. 1092 */ 1093 hilite_search = 0; 1094#endif 1095 1096 /* 1097 * Get various string-valued capabilities. 1098 */ 1099 sp = sbuf; 1100 1101#if HAVE_OSPEED 1102 sc_pad = ltgetstr("pc", &sp); 1103 if (sc_pad != NULL) 1104 PC = *sc_pad; 1105#endif 1106 1107 sc_s_keypad = ltgetstr("ks", &sp); 1108 if (sc_s_keypad == NULL) 1109 sc_s_keypad = ""; 1110 sc_e_keypad = ltgetstr("ke", &sp); 1111 if (sc_e_keypad == NULL) 1112 sc_e_keypad = ""; 1113 1114 /* 1115 * This loses for terminals with termcap entries with ti/te strings 1116 * that switch to/from an alternate screen, and we're in quit_at_eof 1117 * (eg, more(1)). 1118 */ 1119 if (!quit_at_eof && !more_mode) { 1120 sc_init = ltgetstr("ti", &sp); 1121 sc_deinit = ltgetstr("te", &sp); 1122 } 1123 1124 if (sc_init == NULL) 1125 sc_init = ""; 1126 1127 if (sc_deinit == NULL) 1128 sc_deinit = ""; 1129 1130 sc_eol_clear = ltgetstr("ce", &sp); 1131 if (sc_eol_clear == NULL || *sc_eol_clear == '\0') 1132 { 1133 missing_cap = 1; 1134 sc_eol_clear = ""; 1135 } 1136 1137 sc_eos_clear = ltgetstr("cd", &sp); 1138 if (below_mem && (sc_eos_clear == NULL || *sc_eos_clear == '\0')) 1139 { 1140 missing_cap = 1; 1141 sc_eol_clear = ""; 1142 } 1143 1144 sc_clear = ltgetstr("cl", &sp); 1145 if (sc_clear == NULL || *sc_clear == '\0') 1146 { 1147 missing_cap = 1; 1148 sc_clear = "\n\n"; 1149 } 1150 1151 sc_move = ltgetstr("cm", &sp); 1152 if (sc_move == NULL || *sc_move == '\0') 1153 { 1154 /* 1155 * This is not an error here, because we don't 1156 * always need sc_move. 1157 * We need it only if we don't have home or lower-left. 1158 */ 1159 sc_move = ""; 1160 can_goto_line = 0; 1161 } else 1162 can_goto_line = 1; 1163 1164 tmodes("so", "se", &sc_s_in, &sc_s_out, "", "", &sp); 1165 tmodes("us", "ue", &sc_u_in, &sc_u_out, sc_s_in, sc_s_out, &sp); 1166 tmodes("md", "me", &sc_b_in, &sc_b_out, sc_s_in, sc_s_out, &sp); 1167 tmodes("mb", "me", &sc_bl_in, &sc_bl_out, sc_s_in, sc_s_out, &sp); 1168 1169 sc_visual_bell = ltgetstr("vb", &sp); 1170 if (sc_visual_bell == NULL) 1171 sc_visual_bell = ""; 1172 1173 if (ltgetflag("bs")) 1174 sc_backspace = "\b"; 1175 else 1176 { 1177 sc_backspace = ltgetstr("bc", &sp); 1178 if (sc_backspace == NULL || *sc_backspace == '\0') 1179 sc_backspace = "\b"; 1180 } 1181 1182 /* 1183 * Choose between using "ho" and "cm" ("home" and "cursor move") 1184 * to move the cursor to the upper left corner of the screen. 1185 */ 1186 t1 = ltgetstr("ho", &sp); 1187 if (t1 == NULL) 1188 t1 = ""; 1189 if (*sc_move == '\0') 1190 t2 = ""; 1191 else 1192 { 1193 strcpy(sp, tgoto(sc_move, 0, 0)); 1194 t2 = sp; 1195 sp += strlen(sp) + 1; 1196 } 1197 sc_home = cheaper(t1, t2, "|\b^"); 1198 1199 /* 1200 * Choose between using "ll" and "cm" ("lower left" and "cursor move") 1201 * to move the cursor to the lower left corner of the screen. 1202 */ 1203 t1 = ltgetstr("ll", &sp); 1204 if (t1 == NULL) 1205 t1 = ""; 1206 if (*sc_move == '\0') 1207 t2 = ""; 1208 else 1209 { 1210 strcpy(sp, tgoto(sc_move, 0, sc_height-1)); 1211 t2 = sp; 1212 sp += strlen(sp) + 1; 1213 } 1214 sc_lower_left = cheaper(t1, t2, "\r"); 1215 1216 /* 1217 * Choose between using "al" or "sr" ("add line" or "scroll reverse") 1218 * to add a line at the top of the screen. 1219 */ 1220 t1 = ltgetstr("al", &sp); 1221 if (t1 == NULL) 1222 t1 = ""; 1223 t2 = ltgetstr("sr", &sp); 1224 if (t2 == NULL) 1225 t2 = ""; 1226#if OS2 1227 if (*t1 == '\0' && *t2 == '\0') 1228 sc_addline = ""; 1229 else 1230#endif 1231 if (above_mem) 1232 sc_addline = t1; 1233 else 1234 sc_addline = cheaper(t1, t2, ""); 1235 if (*sc_addline == '\0') 1236 { 1237 /* 1238 * Force repaint on any backward movement. 1239 */ 1240 no_back_scroll = 1; 1241 } 1242#endif /* MSDOS_COMPILER */ 1243} 1244 1245#if !MSDOS_COMPILER 1246/* 1247 * Return the cost of displaying a termcap string. 1248 * We use the trick of calling tputs, but as a char printing function 1249 * we give it inc_costcount, which just increments "costcount". 1250 * This tells us how many chars would be printed by using this string. 1251 * {{ Couldn't we just use strlen? }} 1252 */ 1253static int costcount; 1254 1255/*ARGSUSED*/ 1256 static int 1257inc_costcount(c) 1258 int c; 1259{ 1260 costcount++; 1261 return (c); 1262} 1263 1264 static int 1265cost(t) 1266 char *t; 1267{ 1268 costcount = 0; 1269 tputs(t, sc_height, inc_costcount); 1270 return (costcount); 1271} 1272 1273/* 1274 * Return the "best" of the two given termcap strings. 1275 * The best, if both exist, is the one with the lower 1276 * cost (see cost() function). 1277 */ 1278 static char * 1279cheaper(t1, t2, def) 1280 char *t1, *t2; 1281 char *def; 1282{ 1283 if (*t1 == '\0' && *t2 == '\0') 1284 { 1285 missing_cap = 1; 1286 return (def); 1287 } 1288 if (*t1 == '\0') 1289 return (t2); 1290 if (*t2 == '\0') 1291 return (t1); 1292 if (cost(t1) < cost(t2)) 1293 return (t1); 1294 return (t2); 1295} 1296 1297 static void 1298tmodes(incap, outcap, instr, outstr, def_instr, def_outstr, spp) 1299 char *incap; 1300 char *outcap; 1301 char **instr; 1302 char **outstr; 1303 char *def_instr; 1304 char *def_outstr; 1305 char **spp; 1306{ 1307 *instr = ltgetstr(incap, spp); 1308 if (*instr == NULL) 1309 { 1310 /* Use defaults. */ 1311 *instr = def_instr; 1312 *outstr = def_outstr; 1313 return; 1314 } 1315 1316 *outstr = ltgetstr(outcap, spp); 1317 if (*outstr == NULL) 1318 /* No specific out capability; use "me". */ 1319 *outstr = ltgetstr("me", spp); 1320 if (*outstr == NULL) 1321 /* Don't even have "me"; use a null string. */ 1322 *outstr = ""; 1323} 1324 1325#endif /* MSDOS_COMPILER */ 1326 1327 1328/* 1329 * Below are the functions which perform all the 1330 * terminal-specific screen manipulation. 1331 */ 1332 1333 1334#if MSDOS_COMPILER 1335 1336#if MSDOS_COMPILER==WIN32C 1337 static void 1338_settextposition(int row, int col) 1339{ 1340 COORD cpos; 1341 CONSOLE_SCREEN_BUFFER_INFO csbi; 1342 1343 GetConsoleScreenBufferInfo(con_out, &csbi); 1344 cpos.X = csbi.srWindow.Left + (col - 1); 1345 cpos.Y = csbi.srWindow.Top + (row - 1); 1346 SetConsoleCursorPosition(con_out, cpos); 1347} 1348#endif 1349 1350/* 1351 * Initialize the screen to the correct color at startup. 1352 */ 1353 static void 1354initcolor() 1355{ 1356 SETCOLORS(nm_fg_color, nm_bg_color); 1357#if 0 1358 /* 1359 * This clears the screen at startup. This is different from 1360 * the behavior of other versions of less. Disable it for now. 1361 */ 1362 char *blanks; 1363 int row; 1364 int col; 1365 1366 /* 1367 * Create a complete, blank screen using "normal" colors. 1368 */ 1369 SETCOLORS(nm_fg_color, nm_bg_color); 1370 blanks = (char *) ecalloc(width+1, sizeof(char)); 1371 for (col = 0; col < sc_width; col++) 1372 blanks[col] = ' '; 1373 blanks[sc_width] = '\0'; 1374 for (row = 0; row < sc_height; row++) 1375 _outtext(blanks); 1376 free(blanks); 1377#endif 1378} 1379#endif 1380 1381#if MSDOS_COMPILER==WIN32C 1382 1383/* 1384 * Termcap-like init with a private win32 console. 1385 */ 1386 static void 1387win32_init_term() 1388{ 1389 CONSOLE_SCREEN_BUFFER_INFO scr; 1390 COORD size; 1391 1392 if (con_out_save == INVALID_HANDLE_VALUE) 1393 return; 1394 1395 GetConsoleScreenBufferInfo(con_out_save, &scr); 1396 1397 if (con_out_ours == INVALID_HANDLE_VALUE) 1398 { 1399 /* 1400 * Create our own screen buffer, so that we 1401 * may restore the original when done. 1402 */ 1403 con_out_ours = CreateConsoleScreenBuffer( 1404 GENERIC_WRITE | GENERIC_READ, 1405 FILE_SHARE_WRITE | FILE_SHARE_READ, 1406 (LPSECURITY_ATTRIBUTES) NULL, 1407 CONSOLE_TEXTMODE_BUFFER, 1408 (LPVOID) NULL); 1409 } 1410 1411 size.X = scr.srWindow.Right - scr.srWindow.Left + 1; 1412 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1; 1413 SetConsoleScreenBufferSize(con_out_ours, size); 1414 SetConsoleActiveScreenBuffer(con_out_ours); 1415 con_out = con_out_ours; 1416} 1417 1418/* 1419 * Restore the startup console. 1420 */ 1421static void 1422win32_deinit_term() 1423{ 1424 if (con_out_save == INVALID_HANDLE_VALUE) 1425 return; 1426 if (quitting) 1427 (void) CloseHandle(con_out_ours); 1428 SetConsoleActiveScreenBuffer(con_out_save); 1429 con_out = con_out_save; 1430} 1431 1432#endif 1433 1434/* 1435 * Initialize terminal 1436 */ 1437 public void 1438init() 1439{ 1440 if (no_init) 1441 { 1442#if MSDOS_COMPILER==WIN32C 1443 /* no_init or not, never trash win32 console colors. */ 1444 initcolor(); 1445 flush(); 1446#endif 1447 return; 1448 } 1449#if !MSDOS_COMPILER 1450 tputs(sc_init, sc_height, putchr); 1451 tputs(sc_s_keypad, sc_height, putchr); 1452#else 1453#if MSDOS_COMPILER==WIN32C 1454 win32_init_term(); 1455#endif 1456 initcolor(); 1457 flush(); 1458#endif 1459 init_done = 1; 1460} 1461 1462/* 1463 * Deinitialize terminal 1464 */ 1465 public void 1466deinit() 1467{ 1468 if (no_init) 1469 { 1470#if MSDOS_COMPILER==WIN32C 1471 /* no_init or not, never trash win32 console colors. */ 1472 SETCOLORS(sy_fg_color, sy_bg_color); 1473#endif 1474 return; 1475 } 1476 1477 if (!init_done) 1478 return; 1479#if !MSDOS_COMPILER 1480 tputs(sc_e_keypad, sc_height, putchr); 1481 tputs(sc_deinit, sc_height, putchr); 1482#else 1483 SETCOLORS(sy_fg_color, sy_bg_color); 1484#if MSDOS_COMPILER==WIN32C 1485 win32_deinit_term(); 1486#endif 1487#endif 1488 init_done = 0; 1489} 1490 1491/* 1492 * Home cursor (move to upper left corner of screen). 1493 */ 1494 public void 1495home() 1496{ 1497#if !MSDOS_COMPILER 1498 tputs(sc_home, 1, putchr); 1499#else 1500 flush(); 1501 _settextposition(1,1); 1502#endif 1503} 1504 1505/* 1506 * Add a blank line (called with cursor at home). 1507 * Should scroll the display down. 1508 */ 1509 public void 1510add_line() 1511{ 1512#if !MSDOS_COMPILER 1513 tputs(sc_addline, sc_height, putchr); 1514#else 1515 flush(); 1516#if MSDOS_COMPILER==MSOFTC 1517 _scrolltextwindow(_GSCROLLDOWN); 1518 _settextposition(1,1); 1519#else 1520#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 1521 movetext(1,1, sc_width,sc_height-1, 1,2); 1522 gotoxy(1,1); 1523 clreol(); 1524#else 1525#if MSDOS_COMPILER==WIN32C 1526 { 1527 CHAR_INFO fillchar; 1528 SMALL_RECT rcSrc, rcClip; 1529 COORD new_org; 1530 CONSOLE_SCREEN_BUFFER_INFO csbi; 1531 1532 GetConsoleScreenBufferInfo(con_out,&csbi); 1533 1534 /* The clip rectangle is the entire visible screen. */ 1535 rcClip.Left = csbi.srWindow.Left; 1536 rcClip.Top = csbi.srWindow.Top; 1537 rcClip.Right = csbi.srWindow.Right; 1538 rcClip.Bottom = csbi.srWindow.Bottom; 1539 1540 /* The source rectangle is the visible screen minus the last line. */ 1541 rcSrc = rcClip; 1542 rcSrc.Bottom--; 1543 1544 /* Move the top left corner of the source window down one row. */ 1545 new_org.X = rcSrc.Left; 1546 new_org.Y = rcSrc.Top + 1; 1547 1548 /* Fill the right character and attributes. */ 1549 fillchar.Char.AsciiChar = ' '; 1550 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 1551 fillchar.Attributes = curr_attr; 1552 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); 1553 _settextposition(1,1); 1554 } 1555#endif 1556#endif 1557#endif 1558#endif 1559} 1560 1561/* 1562 * Remove the n topmost lines and scroll everything below it in the 1563 * window upward. This is needed to stop leaking the topmost line 1564 * into the scrollback buffer when we go down-one-line (in WIN32). 1565 */ 1566 public void 1567remove_top(n) 1568 int n; 1569{ 1570#if MSDOS_COMPILER==WIN32C 1571 SMALL_RECT rcSrc, rcClip; 1572 CHAR_INFO fillchar; 1573 COORD new_org; 1574 CONSOLE_SCREEN_BUFFER_INFO csbi; /* to get buffer info */ 1575 1576 if (n >= sc_height - 1) 1577 { 1578 clear(); 1579 home(); 1580 return; 1581 } 1582 1583 flush(); 1584 1585 GetConsoleScreenBufferInfo(con_out, &csbi); 1586 1587 /* Get the extent of all-visible-rows-but-the-last. */ 1588 rcSrc.Left = csbi.srWindow.Left; 1589 rcSrc.Top = csbi.srWindow.Top + n; 1590 rcSrc.Right = csbi.srWindow.Right; 1591 rcSrc.Bottom = csbi.srWindow.Bottom; 1592 1593 /* Get the clip rectangle. */ 1594 rcClip.Left = rcSrc.Left; 1595 rcClip.Top = csbi.srWindow.Top; 1596 rcClip.Right = rcSrc.Right; 1597 rcClip.Bottom = rcSrc.Bottom ; 1598 1599 /* Move the source window up n rows. */ 1600 new_org.X = rcSrc.Left; 1601 new_org.Y = rcSrc.Top - n; 1602 1603 /* Fill the right character and attributes. */ 1604 fillchar.Char.AsciiChar = ' '; 1605 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 1606 fillchar.Attributes = curr_attr; 1607 1608 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); 1609 1610 /* Position cursor on first blank line. */ 1611 goto_line(sc_height - n - 1); 1612#endif 1613} 1614 1615/* 1616 * Move cursor to lower left corner of screen. 1617 */ 1618 public void 1619lower_left() 1620{ 1621#if !MSDOS_COMPILER 1622 tputs(sc_lower_left, 1, putchr); 1623#else 1624 flush(); 1625 _settextposition(sc_height, 1); 1626#endif 1627} 1628 1629/* 1630 * Check if the console size has changed and reset internals 1631 * (in lieu of SIGWINCH for WIN32). 1632 */ 1633 public void 1634check_winch() 1635{ 1636#if MSDOS_COMPILER==WIN32C 1637 CONSOLE_SCREEN_BUFFER_INFO scr; 1638 COORD size; 1639 1640 if (con_out == INVALID_HANDLE_VALUE) 1641 return; 1642 1643 flush(); 1644 GetConsoleScreenBufferInfo(con_out, &scr); 1645 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1; 1646 size.X = scr.srWindow.Right - scr.srWindow.Left + 1; 1647 if (size.Y != sc_height || size.X != sc_width) 1648 { 1649 sc_height = size.Y; 1650 sc_width = size.X; 1651 if (!no_init && con_out_ours == con_out) 1652 SetConsoleScreenBufferSize(con_out, size); 1653 pos_init(); 1654 wscroll = (sc_height + 1) / 2; 1655 screen_trashed = 1; 1656 } 1657#endif 1658} 1659 1660/* 1661 * Goto a specific line on the screen. 1662 */ 1663 public void 1664goto_line(slinenum) 1665 int slinenum; 1666{ 1667#if !MSDOS_COMPILER 1668 tputs(tgoto(sc_move, 0, slinenum), 1, putchr); 1669#else 1670 flush(); 1671 _settextposition(slinenum+1, 1); 1672#endif 1673} 1674 1675#if MSDOS_COMPILER==MSOFTC || MSDOS_COMPILER==BORLANDC 1676/* 1677 * Create an alternate screen which is all white. 1678 * This screen is used to create a "flash" effect, by displaying it 1679 * briefly and then switching back to the normal screen. 1680 * {{ Yuck! There must be a better way to get a visual bell. }} 1681 */ 1682 static void 1683create_flash() 1684{ 1685#if MSDOS_COMPILER==MSOFTC 1686 struct videoconfig w; 1687 char *blanks; 1688 int row, col; 1689 1690 _getvideoconfig(&w); 1691 videopages = w.numvideopages; 1692 if (videopages < 2) 1693 { 1694 so_enter(); 1695 so_exit(); 1696 } else 1697 { 1698 _setactivepage(1); 1699 so_enter(); 1700 blanks = (char *) ecalloc(w.numtextcols, sizeof(char)); 1701 for (col = 0; col < w.numtextcols; col++) 1702 blanks[col] = ' '; 1703 for (row = w.numtextrows; row > 0; row--) 1704 _outmem(blanks, w.numtextcols); 1705 _setactivepage(0); 1706 _setvisualpage(0); 1707 free(blanks); 1708 so_exit(); 1709 } 1710#else 1711#if MSDOS_COMPILER==BORLANDC 1712 register int n; 1713 1714 whitescreen = (unsigned short *) 1715 malloc(sc_width * sc_height * sizeof(short)); 1716 if (whitescreen == NULL) 1717 return; 1718 for (n = 0; n < sc_width * sc_height; n++) 1719 whitescreen[n] = 0x7020; 1720#else 1721#if MSDOS_COMPILER==WIN32C 1722 register int n; 1723 1724 whitescreen = (WORD *) 1725 malloc(sc_height * sc_width * sizeof(WORD)); 1726 if (whitescreen == NULL) 1727 return; 1728 /* Invert the standard colors. */ 1729 for (n = 0; n < sc_width * sc_height; n++) 1730 whitescreen[n] = (WORD)((nm_fg_color << 4) | nm_bg_color); 1731#endif 1732#endif 1733#endif 1734 flash_created = 1; 1735} 1736#endif /* MSDOS_COMPILER */ 1737 1738/* 1739 * Output the "visual bell", if there is one. 1740 */ 1741 public void 1742vbell() 1743{ 1744#if !MSDOS_COMPILER 1745 if (*sc_visual_bell == '\0') 1746 return; 1747 tputs(sc_visual_bell, sc_height, putchr); 1748#else 1749#if MSDOS_COMPILER==DJGPPC 1750 ScreenVisualBell(); 1751#else 1752#if MSDOS_COMPILER==MSOFTC 1753 /* 1754 * Create a flash screen on the second video page. 1755 * Switch to that page, then switch back. 1756 */ 1757 if (!flash_created) 1758 create_flash(); 1759 if (videopages < 2) 1760 return; 1761 _setvisualpage(1); 1762 delay(100); 1763 _setvisualpage(0); 1764#else 1765#if MSDOS_COMPILER==BORLANDC 1766 unsigned short *currscreen; 1767 1768 /* 1769 * Get a copy of the current screen. 1770 * Display the flash screen. 1771 * Then restore the old screen. 1772 */ 1773 if (!flash_created) 1774 create_flash(); 1775 if (whitescreen == NULL) 1776 return; 1777 currscreen = (unsigned short *) 1778 malloc(sc_width * sc_height * sizeof(short)); 1779 if (currscreen == NULL) return; 1780 gettext(1, 1, sc_width, sc_height, currscreen); 1781 puttext(1, 1, sc_width, sc_height, whitescreen); 1782 delay(100); 1783 puttext(1, 1, sc_width, sc_height, currscreen); 1784 free(currscreen); 1785#else 1786#if MSDOS_COMPILER==WIN32C 1787 /* paint screen with an inverse color */ 1788 clear(); 1789 1790 /* leave it displayed for 100 msec. */ 1791 Sleep(100); 1792 1793 /* restore with a redraw */ 1794 repaint(); 1795#endif 1796#endif 1797#endif 1798#endif 1799#endif 1800} 1801 1802/* 1803 * Make a noise. 1804 */ 1805 static void 1806beep() 1807{ 1808#if !MSDOS_COMPILER 1809 putchr('\7'); 1810#else 1811#if MSDOS_COMPILER==WIN32C 1812 MessageBeep(0); 1813#else 1814 write(1, "\7", 1); 1815#endif 1816#endif 1817} 1818 1819/* 1820 * Ring the terminal bell. 1821 */ 1822 public void 1823bell() 1824{ 1825 if (quiet == VERY_QUIET) 1826 vbell(); 1827 else 1828 beep(); 1829} 1830 1831/* 1832 * Clear the screen. 1833 */ 1834 public void 1835clear() 1836{ 1837#if !MSDOS_COMPILER 1838 tputs(sc_clear, sc_height, putchr); 1839#else 1840 flush(); 1841#if MSDOS_COMPILER==WIN32C 1842 /* 1843 * This will clear only the currently visible rows of the NT 1844 * console buffer, which means none of the precious scrollback 1845 * rows are touched making for faster scrolling. Note that, if 1846 * the window has fewer columns than the console buffer (i.e. 1847 * there is a horizontal scrollbar as well), the entire width 1848 * of the visible rows will be cleared. 1849 */ 1850 { 1851 COORD topleft; 1852 DWORD nchars; 1853 DWORD winsz; 1854 CONSOLE_SCREEN_BUFFER_INFO csbi; 1855 1856 /* get the number of cells in the current buffer */ 1857 GetConsoleScreenBufferInfo(con_out, &csbi); 1858 winsz = csbi.dwSize.X * (csbi.srWindow.Bottom - csbi.srWindow.Top + 1); 1859 topleft.X = 0; 1860 topleft.Y = csbi.srWindow.Top; 1861 1862 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 1863 FillConsoleOutputCharacter(con_out, ' ', winsz, topleft, &nchars); 1864 FillConsoleOutputAttribute(con_out, curr_attr, winsz, topleft, &nchars); 1865 } 1866#else 1867 _clearscreen(_GCLEARSCREEN); 1868#endif 1869#endif 1870} 1871 1872/* 1873 * Clear from the cursor to the end of the cursor's line. 1874 * {{ This must not move the cursor. }} 1875 */ 1876 public void 1877clear_eol() 1878{ 1879#if !MSDOS_COMPILER 1880 tputs(sc_eol_clear, 1, putchr); 1881#else 1882#if MSDOS_COMPILER==MSOFTC 1883 short top, left; 1884 short bot, right; 1885 struct rccoord tpos; 1886 1887 flush(); 1888 /* 1889 * Save current state. 1890 */ 1891 tpos = _gettextposition(); 1892 _gettextwindow(&top, &left, &bot, &right); 1893 /* 1894 * Set a temporary window to the current line, 1895 * from the cursor's position to the right edge of the screen. 1896 * Then clear that window. 1897 */ 1898 _settextwindow(tpos.row, tpos.col, tpos.row, sc_width); 1899 _clearscreen(_GWINDOW); 1900 /* 1901 * Restore state. 1902 */ 1903 _settextwindow(top, left, bot, right); 1904 _settextposition(tpos.row, tpos.col); 1905#else 1906#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 1907 flush(); 1908 clreol(); 1909#else 1910#if MSDOS_COMPILER==WIN32C 1911 DWORD nchars; 1912 COORD cpos; 1913 CONSOLE_SCREEN_BUFFER_INFO scr; 1914 1915 flush(); 1916 memset(&scr, 0, sizeof(scr)); 1917 GetConsoleScreenBufferInfo(con_out, &scr); 1918 cpos.X = scr.dwCursorPosition.X; 1919 cpos.Y = scr.dwCursorPosition.Y; 1920 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 1921 FillConsoleOutputAttribute(con_out, curr_attr, 1922 scr.dwSize.X - cpos.X, cpos, &nchars); 1923 FillConsoleOutputCharacter(con_out, ' ', 1924 scr.dwSize.X - cpos.X, cpos, &nchars); 1925#endif 1926#endif 1927#endif 1928#endif 1929} 1930 1931/* 1932 * Clear the current line. 1933 * Clear the screen if there's off-screen memory below the display. 1934 */ 1935 static void 1936clear_eol_bot() 1937{ 1938#if MSDOS_COMPILER 1939 clear_eol(); 1940#else 1941 if (below_mem) 1942 tputs(sc_eos_clear, 1, putchr); 1943 else 1944 tputs(sc_eol_clear, 1, putchr); 1945#endif 1946} 1947 1948/* 1949 * Clear the bottom line of the display. 1950 * Leave the cursor at the beginning of the bottom line. 1951 */ 1952 public void 1953clear_bot() 1954{ 1955 /* 1956 * If we're in a non-normal attribute mode, temporarily exit 1957 * the mode while we do the clear. Some terminals fill the 1958 * cleared area with the current attribute. 1959 */ 1960 lower_left(); 1961 switch (attrmode) 1962 { 1963 case AT_STANDOUT: 1964 so_exit(); 1965 clear_eol_bot(); 1966 so_enter(); 1967 break; 1968 case AT_UNDERLINE: 1969 ul_exit(); 1970 clear_eol_bot(); 1971 ul_enter(); 1972 break; 1973 case AT_BOLD: 1974 bo_exit(); 1975 clear_eol_bot(); 1976 bo_enter(); 1977 break; 1978 case AT_BLINK: 1979 bl_exit(); 1980 clear_eol_bot(); 1981 bl_enter(); 1982 break; 1983 default: 1984 clear_eol_bot(); 1985 break; 1986 } 1987} 1988 1989/* 1990 * Begin "standout" (bold, underline, or whatever). 1991 */ 1992 public void 1993so_enter() 1994{ 1995#if !MSDOS_COMPILER 1996 tputs(sc_s_in, 1, putchr); 1997#else 1998 flush(); 1999 SETCOLORS(so_fg_color, so_bg_color); 2000#endif 2001 attrmode = AT_STANDOUT; 2002} 2003 2004/* 2005 * End "standout". 2006 */ 2007 public void 2008so_exit() 2009{ 2010#if !MSDOS_COMPILER 2011 tputs(sc_s_out, 1, putchr); 2012#else 2013 flush(); 2014 SETCOLORS(nm_fg_color, nm_bg_color); 2015#endif 2016 attrmode = AT_NORMAL; 2017} 2018 2019/* 2020 * Begin "underline" (hopefully real underlining, 2021 * otherwise whatever the terminal provides). 2022 */ 2023 public void 2024ul_enter() 2025{ 2026#if !MSDOS_COMPILER 2027 tputs(sc_u_in, 1, putchr); 2028#else 2029 flush(); 2030 SETCOLORS(ul_fg_color, ul_bg_color); 2031#endif 2032 attrmode = AT_UNDERLINE; 2033} 2034 2035/* 2036 * End "underline". 2037 */ 2038 public void 2039ul_exit() 2040{ 2041#if !MSDOS_COMPILER 2042 tputs(sc_u_out, 1, putchr); 2043#else 2044 flush(); 2045 SETCOLORS(nm_fg_color, nm_bg_color); 2046#endif 2047 attrmode = AT_NORMAL; 2048} 2049 2050/* 2051 * Begin "bold" 2052 */ 2053 public void 2054bo_enter() 2055{ 2056#if !MSDOS_COMPILER 2057 tputs(sc_b_in, 1, putchr); 2058#else 2059 flush(); 2060 SETCOLORS(bo_fg_color, bo_bg_color); 2061#endif 2062 attrmode = AT_BOLD; 2063} 2064 2065/* 2066 * End "bold". 2067 */ 2068 public void 2069bo_exit() 2070{ 2071#if !MSDOS_COMPILER 2072 tputs(sc_b_out, 1, putchr); 2073#else 2074 flush(); 2075 SETCOLORS(nm_fg_color, nm_bg_color); 2076#endif 2077 attrmode = AT_NORMAL; 2078} 2079 2080/* 2081 * Begin "blink" 2082 */ 2083 public void 2084bl_enter() 2085{ 2086#if !MSDOS_COMPILER 2087 tputs(sc_bl_in, 1, putchr); 2088#else 2089 flush(); 2090 SETCOLORS(bl_fg_color, bl_bg_color); 2091#endif 2092 attrmode = AT_BLINK; 2093} 2094 2095/* 2096 * End "blink". 2097 */ 2098 public void 2099bl_exit() 2100{ 2101#if !MSDOS_COMPILER 2102 tputs(sc_bl_out, 1, putchr); 2103#else 2104 flush(); 2105 SETCOLORS(nm_fg_color, nm_bg_color); 2106#endif 2107 attrmode = AT_NORMAL; 2108} 2109 2110#if 0 /* No longer used */ 2111/* 2112 * Erase the character to the left of the cursor 2113 * and move the cursor left. 2114 */ 2115 public void 2116backspace() 2117{ 2118#if !MSDOS_COMPILER 2119 /* 2120 * Erase the previous character by overstriking with a space. 2121 */ 2122 tputs(sc_backspace, 1, putchr); 2123 putchr(' '); 2124 tputs(sc_backspace, 1, putchr); 2125#else 2126#if MSDOS_COMPILER==MSOFTC 2127 struct rccoord tpos; 2128 2129 flush(); 2130 tpos = _gettextposition(); 2131 if (tpos.col <= 1) 2132 return; 2133 _settextposition(tpos.row, tpos.col-1); 2134 _outtext(" "); 2135 _settextposition(tpos.row, tpos.col-1); 2136#else 2137#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 2138 cputs("\b"); 2139#else 2140#if MSDOS_COMPILER==WIN32C 2141 COORD cpos; 2142 DWORD cChars; 2143 CONSOLE_SCREEN_BUFFER_INFO scr; 2144 2145 flush(); 2146 GetConsoleScreenBufferInfo(con_out, &scr); 2147 cpos = scr.dwCursorPosition; 2148 if (cpos.X <= 0) 2149 return; 2150 cpos.X--; 2151 SetConsoleCursorPosition(con_out, cpos); 2152 FillConsoleOutputCharacter(con_out, (TCHAR)' ', 1, cpos, &cChars); 2153 SetConsoleCursorPosition(con_out, cpos); 2154#endif 2155#endif 2156#endif 2157#endif 2158} 2159#endif /* 0 */ 2160 2161/* 2162 * Output a plain backspace, without erasing the previous char. 2163 */ 2164 public void 2165putbs() 2166{ 2167#if !MSDOS_COMPILER 2168 tputs(sc_backspace, 1, putchr); 2169#else 2170 int row, col; 2171 2172 flush(); 2173 { 2174#if MSDOS_COMPILER==MSOFTC 2175 struct rccoord tpos; 2176 tpos = _gettextposition(); 2177 row = tpos.row; 2178 col = tpos.col; 2179#else 2180#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 2181 row = wherey(); 2182 col = wherex(); 2183#else 2184#if MSDOS_COMPILER==WIN32C 2185 CONSOLE_SCREEN_BUFFER_INFO scr; 2186 GetConsoleScreenBufferInfo(con_out, &scr); 2187 row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1; 2188 col = scr.dwCursorPosition.X - scr.srWindow.Left + 1; 2189#endif 2190#endif 2191#endif 2192 } 2193 if (col <= 1) 2194 return; 2195 _settextposition(row, col-1); 2196#endif /* MSDOS_COMPILER */ 2197} 2198 2199#if MSDOS_COMPILER==WIN32C 2200/* 2201 * Determine whether an input character is waiting to be read. 2202 */ 2203 static int 2204win32_kbhit(tty) 2205 HANDLE tty; 2206{ 2207 INPUT_RECORD ip; 2208 DWORD read; 2209 2210 if (keyCount > 0) 2211 return (TRUE); 2212 2213 currentKey.ascii = 0; 2214 currentKey.scan = 0; 2215 2216 /* 2217 * Wait for a real key-down event, but 2218 * ignore SHIFT and CONTROL key events. 2219 */ 2220 do 2221 { 2222 PeekConsoleInput(tty, &ip, 1, &read); 2223 if (read == 0) 2224 return (FALSE); 2225 ReadConsoleInput(tty, &ip, 1, &read); 2226 } while (ip.EventType != KEY_EVENT || 2227 ip.Event.KeyEvent.bKeyDown != TRUE || 2228 ip.Event.KeyEvent.wVirtualScanCode == 0 || 2229 ip.Event.KeyEvent.wVirtualKeyCode == VK_SHIFT || 2230 ip.Event.KeyEvent.wVirtualKeyCode == VK_CONTROL || 2231 ip.Event.KeyEvent.wVirtualKeyCode == VK_MENU); 2232 2233 currentKey.ascii = ip.Event.KeyEvent.uChar.AsciiChar; 2234 currentKey.scan = ip.Event.KeyEvent.wVirtualScanCode; 2235 keyCount = ip.Event.KeyEvent.wRepeatCount; 2236 2237 if (ip.Event.KeyEvent.dwControlKeyState & 2238 (LEFT_ALT_PRESSED | RIGHT_ALT_PRESSED)) 2239 { 2240 switch (currentKey.scan) 2241 { 2242 case PCK_ALT_E: /* letter 'E' */ 2243 currentKey.ascii = 0; 2244 break; 2245 } 2246 } else if (ip.Event.KeyEvent.dwControlKeyState & 2247 (LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED)) 2248 { 2249 switch (currentKey.scan) 2250 { 2251 case PCK_RIGHT: /* right arrow */ 2252 currentKey.scan = PCK_CTL_RIGHT; 2253 break; 2254 case PCK_LEFT: /* left arrow */ 2255 currentKey.scan = PCK_CTL_LEFT; 2256 break; 2257 case PCK_DELETE: /* delete */ 2258 currentKey.scan = PCK_CTL_DELETE; 2259 break; 2260 } 2261 } 2262 return (TRUE); 2263} 2264 2265/* 2266 * Read a character from the keyboard. 2267 */ 2268 public char 2269WIN32getch(tty) 2270 int tty; 2271{ 2272 int ascii; 2273 2274 if (pending_scancode) 2275 { 2276 pending_scancode = 0; 2277 return ((char)(currentKey.scan & 0x00FF)); 2278 } 2279 2280 while (win32_kbhit((HANDLE)tty) == FALSE) 2281 { 2282 Sleep(20); 2283 if (ABORT_SIGS()) 2284 return ('\003'); 2285 continue; 2286 } 2287 keyCount --; 2288 ascii = currentKey.ascii; 2289 /* 2290 * On PC's, the extended keys return a 2 byte sequence beginning 2291 * with '00', so if the ascii code is 00, the next byte will be 2292 * the lsb of the scan code. 2293 */ 2294 pending_scancode = (ascii == 0x00); 2295 return ((char)ascii); 2296} 2297#endif 2298