1 /* 2 * Copyright (C) 1984-2023 Mark Nudelman 3 * 4 * You may distribute under the terms of either the GNU General Public 5 * License or the Less License, as specified in the README file. 6 * 7 * For more information, see the README file. 8 */ 9 10 11 /* 12 * Routines which deal with the characteristics of the terminal. 13 * Uses termcap to be as terminal-independent as possible. 14 */ 15 16 #include "less.h" 17 #include "cmd.h" 18 19 #if MSDOS_COMPILER 20 #include "pckeys.h" 21 #if MSDOS_COMPILER==MSOFTC 22 #include <graph.h> 23 #else 24 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 25 #include <conio.h> 26 #if MSDOS_COMPILER==DJGPPC 27 #include <pc.h> 28 extern int fd0; 29 #endif 30 #else 31 #if MSDOS_COMPILER==WIN32C 32 #include <windows.h> 33 #endif 34 #endif 35 #endif 36 #include <time.h> 37 38 #ifndef FOREGROUND_BLUE 39 #define FOREGROUND_BLUE 0x0001 40 #endif 41 #ifndef FOREGROUND_GREEN 42 #define FOREGROUND_GREEN 0x0002 43 #endif 44 #ifndef FOREGROUND_RED 45 #define FOREGROUND_RED 0x0004 46 #endif 47 #ifndef FOREGROUND_INTENSITY 48 #define FOREGROUND_INTENSITY 0x0008 49 #endif 50 51 #else 52 53 #if HAVE_SYS_IOCTL_H 54 #include <sys/ioctl.h> 55 #endif 56 57 #if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS 58 #include <termios.h> 59 #else 60 #if HAVE_TERMIO_H 61 #include <termio.h> 62 #else 63 #if HAVE_SGSTAT_H 64 #include <sgstat.h> 65 #else 66 #include <sgtty.h> 67 #endif 68 #endif 69 #endif 70 71 #if HAVE_NCURSESW_TERMCAP_H 72 #include <ncursesw/termcap.h> 73 #else 74 #if HAVE_NCURSES_TERMCAP_H 75 #include <ncurses/termcap.h> 76 #else 77 #if HAVE_TERMCAP_H 78 #include <termcap.h> 79 #endif 80 #endif 81 #endif 82 #ifdef _OSK 83 #include <signal.h> 84 #endif 85 #if OS2 86 #include <sys/signal.h> 87 #include "pckeys.h" 88 #endif 89 #if HAVE_SYS_STREAM_H 90 #include <sys/stream.h> 91 #endif 92 #if HAVE_SYS_PTEM_H 93 #include <sys/ptem.h> 94 #endif 95 96 #endif /* MSDOS_COMPILER */ 97 98 /* 99 * Check for broken termios package that forces you to manually 100 * set the line discipline. 101 */ 102 #ifdef __ultrix__ 103 #define MUST_SET_LINE_DISCIPLINE 1 104 #else 105 #define MUST_SET_LINE_DISCIPLINE 0 106 #endif 107 108 #if OS2 109 #define DEFAULT_TERM "ansi" 110 static char *windowid; 111 #else 112 #define DEFAULT_TERM "unknown" 113 #endif 114 115 #if MSDOS_COMPILER==MSOFTC 116 static int videopages; 117 static long msec_loops; 118 static int flash_created = 0; 119 #define SET_FG_COLOR(fg) _settextcolor(fg) 120 #define SET_BG_COLOR(bg) _setbkcolor(bg) 121 #define SETCOLORS(fg,bg) { SET_FG_COLOR(fg); SET_BG_COLOR(bg); } 122 #endif 123 124 #if MSDOS_COMPILER==BORLANDC 125 static unsigned short *whitescreen; 126 static int flash_created = 0; 127 #endif 128 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 129 #define _settextposition(y,x) gotoxy(x,y) 130 #define _clearscreen(m) clrscr() 131 #define _outtext(s) cputs(s) 132 #define SET_FG_COLOR(fg) textcolor(fg) 133 #define SET_BG_COLOR(bg) textbackground(bg) 134 #define SETCOLORS(fg,bg) { SET_FG_COLOR(fg); SET_BG_COLOR(bg); } 135 extern int sc_height; 136 #endif 137 138 #if MSDOS_COMPILER==WIN32C 139 #define UTF8_MAX_LENGTH 4 140 struct keyRecord 141 { 142 WCHAR unicode; 143 int ascii; 144 int scan; 145 } currentKey; 146 147 static int keyCount = 0; 148 static WORD curr_attr; 149 static int pending_scancode = 0; 150 static char x11mousebuf[] = "[M???"; /* Mouse report, after ESC */ 151 static int x11mousePos, x11mouseCount; 152 static int win_unget_pending = FALSE; 153 static int win_unget_data; 154 155 static HANDLE con_out_save = INVALID_HANDLE_VALUE; /* previous console */ 156 static HANDLE con_out_ours = INVALID_HANDLE_VALUE; /* our own */ 157 HANDLE con_out = INVALID_HANDLE_VALUE; /* current console */ 158 159 extern int utf_mode; 160 extern int quitting; 161 static void win32_init_term(); 162 static void win32_deinit_term(); 163 164 #ifndef ENABLE_VIRTUAL_TERMINAL_PROCESSING 165 #define ENABLE_VIRTUAL_TERMINAL_PROCESSING 4 166 #endif 167 168 #define FG_COLORS (FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_INTENSITY) 169 #define BG_COLORS (BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE | BACKGROUND_INTENSITY) 170 #define MAKEATTR(fg,bg) ((WORD)((fg)|((bg)<<4))) 171 #define APPLY_COLORS() { if (SetConsoleTextAttribute(con_out, curr_attr) == 0) \ 172 error("SETCOLORS failed", NULL_PARG); } 173 #define SET_FG_COLOR(fg) { curr_attr &= ~0x0f; curr_attr |= (fg); APPLY_COLORS(); } 174 #define SET_BG_COLOR(bg) { curr_attr &= ~0xf0; curr_attr |= ((bg)<<4); APPLY_COLORS(); } 175 #define SETCOLORS(fg,bg) { curr_attr = MAKEATTR(fg,bg); APPLY_COLORS(); } 176 #endif 177 178 #if MSDOS_COMPILER 179 public int nm_fg_color; /* Color of normal text */ 180 public int nm_bg_color; 181 public int bo_fg_color; /* Color of bold text */ 182 public int bo_bg_color; 183 public int ul_fg_color; /* Color of underlined text */ 184 public int ul_bg_color; 185 public int so_fg_color; /* Color of standout text */ 186 public int so_bg_color; 187 public int bl_fg_color; /* Color of blinking text */ 188 public int bl_bg_color; 189 static int sy_fg_color; /* Color of system text (before less) */ 190 static int sy_bg_color; 191 public int sgr_mode; /* Honor ANSI sequences rather than using above */ 192 #if MSDOS_COMPILER==WIN32C 193 static DWORD init_output_mode; /* The initial console output mode */ 194 public int vt_enabled = -1; /* Is virtual terminal processing available? */ 195 #endif 196 #else 197 198 /* 199 * Strings passed to tputs() to do various terminal functions. 200 */ 201 static char 202 *sc_pad, /* Pad string */ 203 *sc_home, /* Cursor home */ 204 *sc_addline, /* Add line, scroll down following lines */ 205 *sc_lower_left, /* Cursor to last line, first column */ 206 *sc_return, /* Cursor to beginning of current line */ 207 *sc_move, /* General cursor positioning */ 208 *sc_clear, /* Clear screen */ 209 *sc_eol_clear, /* Clear to end of line */ 210 *sc_eos_clear, /* Clear to end of screen */ 211 *sc_s_in, /* Enter standout (highlighted) mode */ 212 *sc_s_out, /* Exit standout mode */ 213 *sc_u_in, /* Enter underline mode */ 214 *sc_u_out, /* Exit underline mode */ 215 *sc_b_in, /* Enter bold mode */ 216 *sc_b_out, /* Exit bold mode */ 217 *sc_bl_in, /* Enter blink mode */ 218 *sc_bl_out, /* Exit blink mode */ 219 *sc_visual_bell, /* Visual bell (flash screen) sequence */ 220 *sc_backspace, /* Backspace cursor */ 221 *sc_s_keypad, /* Start keypad mode */ 222 *sc_e_keypad, /* End keypad mode */ 223 *sc_s_mousecap, /* Start mouse capture mode */ 224 *sc_e_mousecap, /* End mouse capture mode */ 225 *sc_init, /* Startup terminal initialization */ 226 *sc_deinit; /* Exit terminal de-initialization */ 227 228 static int attrcolor = -1; 229 #endif 230 231 static int init_done = 0; 232 233 public int auto_wrap; /* Terminal does \r\n when write past margin */ 234 public int ignaw; /* Terminal ignores \n immediately after wrap */ 235 public int erase_char; /* The user's erase char */ 236 public int erase2_char; /* The user's other erase char */ 237 public int kill_char; /* The user's line-kill char */ 238 public int werase_char; /* The user's word-erase char */ 239 public int sc_width, sc_height; /* Height & width of screen */ 240 public int bo_s_width, bo_e_width; /* Printing width of boldface seq */ 241 public int ul_s_width, ul_e_width; /* Printing width of underline seq */ 242 public int so_s_width, so_e_width; /* Printing width of standout seq */ 243 public int bl_s_width, bl_e_width; /* Printing width of blink seq */ 244 public int above_mem, below_mem; /* Memory retained above/below screen */ 245 public int can_goto_line; /* Can move cursor to any line */ 246 public int clear_bg; /* Clear fills with background color */ 247 public int missing_cap = 0; /* Some capability is missing */ 248 public char *kent = NULL; /* Keypad ENTER sequence */ 249 public int term_init_done = FALSE; 250 public int full_screen = TRUE; 251 252 static int attrmode = AT_NORMAL; 253 static int termcap_debug = -1; 254 static int no_alt_screen; /* sc_init does not switch to alt screen */ 255 extern int binattr; 256 extern int one_screen; 257 #if LESSTEST 258 extern char *ttyin_name; 259 #endif /*LESSTEST*/ 260 261 #if !MSDOS_COMPILER 262 static char *cheaper(char *t1, char *t2, char *def); 263 static void tmodes(char *incap, char *outcap, char **instr, 264 char **outstr, char *def_instr, char *def_outstr, char **spp); 265 #endif 266 267 /* 268 * These two variables are sometimes defined in, 269 * and needed by, the termcap library. 270 */ 271 #if MUST_DEFINE_OSPEED 272 extern short ospeed; /* Terminal output baud rate */ 273 extern char PC; /* Pad character */ 274 #endif 275 #ifdef _OSK 276 short ospeed; 277 char PC_, *UP, *BC; 278 #endif 279 280 extern int quiet; /* If VERY_QUIET, use visual bell for bell */ 281 extern int no_vbell; 282 extern int no_back_scroll; 283 extern int swindow; 284 extern int no_init; 285 extern int no_keypad; 286 extern int sigs; 287 extern int wscroll; 288 extern int screen_trashed; 289 extern int top_scroll; 290 extern int quit_if_one_screen; 291 extern int oldbot; 292 extern int mousecap; 293 extern int is_tty; 294 extern int use_color; 295 #if HILITE_SEARCH 296 extern int hilite_search; 297 #endif 298 #if MSDOS_COMPILER==WIN32C 299 extern HANDLE tty; 300 extern DWORD console_mode; 301 #ifndef ENABLE_EXTENDED_FLAGS 302 #define ENABLE_EXTENDED_FLAGS 0x80 303 #define ENABLE_QUICK_EDIT_MODE 0x40 304 #endif 305 #else 306 extern int tty; 307 #endif 308 309 #if (HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS) || defined(TCGETA) 310 /* 311 * Set termio flags for use by less. 312 */ 313 static void set_termio_flags( 314 #if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS 315 struct termios *s 316 #else 317 struct termio *s 318 #endif 319 ) 320 { 321 s->c_lflag &= ~(0 322 #ifdef ICANON 323 | ICANON 324 #endif 325 #ifdef ECHO 326 | ECHO 327 #endif 328 #ifdef ECHOE 329 | ECHOE 330 #endif 331 #ifdef ECHOK 332 | ECHOK 333 #endif 334 #ifdef ECHONL 335 | ECHONL 336 #endif 337 ); 338 339 s->c_oflag |= (0 340 #ifdef OXTABS 341 | OXTABS 342 #else 343 #ifdef TAB3 344 | TAB3 345 #else 346 #ifdef XTABS 347 | XTABS 348 #endif 349 #endif 350 #endif 351 #ifdef OPOST 352 | OPOST 353 #endif 354 #ifdef ONLCR 355 | ONLCR 356 #endif 357 ); 358 359 s->c_oflag &= ~(0 360 #ifdef ONOEOT 361 | ONOEOT 362 #endif 363 #ifdef OCRNL 364 | OCRNL 365 #endif 366 #ifdef ONOCR 367 | ONOCR 368 #endif 369 #ifdef ONLRET 370 | ONLRET 371 #endif 372 ); 373 } 374 #endif 375 376 /* 377 * Change terminal to "raw mode", or restore to "normal" mode. 378 * "Raw mode" means 379 * 1. An outstanding read will complete on receipt of a single keystroke. 380 * 2. Input is not echoed. 381 * 3. On output, \n is mapped to \r\n. 382 * 4. \t is NOT expanded into spaces. 383 * 5. Signal-causing characters such as ctrl-C (interrupt), 384 * etc. are NOT disabled. 385 * It doesn't matter whether an input \n is mapped to \r, or vice versa. 386 */ 387 public void raw_mode(int on) 388 { 389 static int curr_on = 0; 390 391 if (on == curr_on) 392 return; 393 erase2_char = '\b'; /* in case OS doesn't know about erase2 */ 394 #if LESSTEST 395 if (ttyin_name != NULL) 396 { 397 /* {{ For consistent conditions when running tests. }} */ 398 erase_char = '\b'; 399 kill_char = CONTROL('U'); 400 werase_char = CONTROL('W'); 401 } else 402 #endif /*LESSTEST*/ 403 #if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS 404 { 405 struct termios s; 406 static struct termios save_term; 407 static int saved_term = 0; 408 409 if (on) 410 { 411 /* 412 * Get terminal modes. 413 */ 414 if (tcgetattr(tty, &s) < 0) 415 { 416 erase_char = '\b'; 417 kill_char = CONTROL('U'); 418 werase_char = CONTROL('W'); 419 } else 420 { 421 /* 422 * Save modes and set certain variables dependent on modes. 423 */ 424 if (!saved_term) 425 { 426 save_term = s; 427 saved_term = 1; 428 } 429 #if HAVE_OSPEED 430 switch (cfgetospeed(&s)) 431 { 432 #ifdef B0 433 case B0: ospeed = 0; break; 434 #endif 435 #ifdef B50 436 case B50: ospeed = 1; break; 437 #endif 438 #ifdef B75 439 case B75: ospeed = 2; break; 440 #endif 441 #ifdef B110 442 case B110: ospeed = 3; break; 443 #endif 444 #ifdef B134 445 case B134: ospeed = 4; break; 446 #endif 447 #ifdef B150 448 case B150: ospeed = 5; break; 449 #endif 450 #ifdef B200 451 case B200: ospeed = 6; break; 452 #endif 453 #ifdef B300 454 case B300: ospeed = 7; break; 455 #endif 456 #ifdef B600 457 case B600: ospeed = 8; break; 458 #endif 459 #ifdef B1200 460 case B1200: ospeed = 9; break; 461 #endif 462 #ifdef B1800 463 case B1800: ospeed = 10; break; 464 #endif 465 #ifdef B2400 466 case B2400: ospeed = 11; break; 467 #endif 468 #ifdef B4800 469 case B4800: ospeed = 12; break; 470 #endif 471 #ifdef B9600 472 case B9600: ospeed = 13; break; 473 #endif 474 #ifdef EXTA 475 case EXTA: ospeed = 14; break; 476 #endif 477 #ifdef EXTB 478 case EXTB: ospeed = 15; break; 479 #endif 480 #ifdef B57600 481 case B57600: ospeed = 16; break; 482 #endif 483 #ifdef B115200 484 case B115200: ospeed = 17; break; 485 #endif 486 default: ; 487 } 488 #endif 489 erase_char = s.c_cc[VERASE]; 490 #ifdef VERASE2 491 erase2_char = s.c_cc[VERASE2]; 492 #endif 493 kill_char = s.c_cc[VKILL]; 494 #ifdef VWERASE 495 werase_char = s.c_cc[VWERASE]; 496 #else 497 werase_char = CONTROL('W'); 498 #endif 499 500 /* 501 * Set the modes to the way we want them. 502 */ 503 set_termio_flags(&s); 504 s.c_cc[VMIN] = 1; 505 s.c_cc[VTIME] = 0; 506 #ifdef VLNEXT 507 s.c_cc[VLNEXT] = 0; 508 #endif 509 #ifdef VDSUSP 510 s.c_cc[VDSUSP] = 0; 511 #endif 512 #ifdef VSTOP 513 s.c_cc[VSTOP] = 0; 514 #endif 515 #ifdef VSTART 516 s.c_cc[VSTART] = 0; 517 #endif 518 #if MUST_SET_LINE_DISCIPLINE 519 /* 520 * System's termios is broken; need to explicitly 521 * request TERMIODISC line discipline. 522 */ 523 s.c_line = TERMIODISC; 524 #endif 525 } 526 } else 527 { 528 /* 529 * Restore saved modes. 530 */ 531 s = save_term; 532 } 533 #if HAVE_FSYNC 534 fsync(tty); 535 #endif 536 tcsetattr(tty, TCSADRAIN, &s); 537 #if MUST_SET_LINE_DISCIPLINE 538 if (!on) 539 { 540 /* 541 * Broken termios *ignores* any line discipline 542 * except TERMIODISC. A different old line discipline 543 * is therefore not restored, yet. Restore the old 544 * line discipline by hand. 545 */ 546 ioctl(tty, TIOCSETD, &save_term.c_line); 547 } 548 #endif 549 } 550 #else 551 #ifdef TCGETA 552 { 553 struct termio s; 554 static struct termio save_term; 555 static int saved_term = 0; 556 557 if (on) 558 { 559 /* 560 * Get terminal modes. 561 */ 562 ioctl(tty, TCGETA, &s); 563 564 /* 565 * Save modes and set certain variables dependent on modes. 566 */ 567 if (!saved_term) 568 { 569 save_term = s; 570 saved_term = 1; 571 } 572 #if HAVE_OSPEED 573 ospeed = s.c_cflag & CBAUD; 574 #endif 575 erase_char = s.c_cc[VERASE]; 576 kill_char = s.c_cc[VKILL]; 577 #ifdef VWERASE 578 werase_char = s.c_cc[VWERASE]; 579 #else 580 werase_char = CONTROL('W'); 581 #endif 582 583 /* 584 * Set the modes to the way we want them. 585 */ 586 set_termio_flags(&s); 587 s.c_cc[VMIN] = 1; 588 s.c_cc[VTIME] = 0; 589 #ifdef VSTOP 590 s.c_cc[VSTOP] = 0; 591 #endif 592 #ifdef VSTART 593 s.c_cc[VSTART] = 0; 594 #endif 595 } else 596 { 597 /* 598 * Restore saved modes. 599 */ 600 s = save_term; 601 } 602 ioctl(tty, TCSETAW, &s); 603 } 604 #else 605 #ifdef TIOCGETP 606 { 607 struct sgttyb s; 608 static struct sgttyb save_term; 609 static int saved_term = 0; 610 611 if (on) 612 { 613 /* 614 * Get terminal modes. 615 */ 616 ioctl(tty, TIOCGETP, &s); 617 618 /* 619 * Save modes and set certain variables dependent on modes. 620 */ 621 if (!saved_term) 622 { 623 save_term = s; 624 saved_term = 1; 625 } 626 #if HAVE_OSPEED 627 ospeed = s.sg_ospeed; 628 #endif 629 erase_char = s.sg_erase; 630 kill_char = s.sg_kill; 631 werase_char = CONTROL('W'); 632 633 /* 634 * Set the modes to the way we want them. 635 */ 636 s.sg_flags |= CBREAK; 637 s.sg_flags &= ~(ECHO|XTABS); 638 } else 639 { 640 /* 641 * Restore saved modes. 642 */ 643 s = save_term; 644 } 645 ioctl(tty, TIOCSETN, &s); 646 } 647 #else 648 #ifdef _OSK 649 { 650 struct sgbuf s; 651 static struct sgbuf save_term; 652 static int saved_term = 0; 653 654 if (on) 655 { 656 /* 657 * Get terminal modes. 658 */ 659 _gs_opt(tty, &s); 660 661 /* 662 * Save modes and set certain variables dependent on modes. 663 */ 664 if (!saved_term) 665 { 666 save_term = s; 667 saved_term = 1; 668 } 669 erase_char = s.sg_bspch; 670 kill_char = s.sg_dlnch; 671 werase_char = CONTROL('W'); 672 673 /* 674 * Set the modes to the way we want them. 675 */ 676 s.sg_echo = 0; 677 s.sg_eofch = 0; 678 s.sg_pause = 0; 679 s.sg_psch = 0; 680 } else 681 { 682 /* 683 * Restore saved modes. 684 */ 685 s = save_term; 686 } 687 _ss_opt(tty, &s); 688 } 689 #else 690 /* MS-DOS, Windows, or OS2 */ 691 #if OS2 692 /* OS2 */ 693 LSIGNAL(SIGINT, SIG_IGN); 694 #endif 695 erase_char = '\b'; 696 #if MSDOS_COMPILER==DJGPPC 697 kill_char = CONTROL('U'); 698 /* 699 * So that when we shell out or run another program, its 700 * stdin is in cooked mode. We do not switch stdin to binary 701 * mode if fd0 is zero, since that means we were called before 702 * tty was reopened in open_getchr, in which case we would be 703 * changing the original stdin device outside less. 704 */ 705 if (fd0 != 0) 706 setmode(0, on ? O_BINARY : O_TEXT); 707 #else 708 kill_char = ESC; 709 #endif 710 werase_char = CONTROL('W'); 711 #endif 712 #endif 713 #endif 714 #endif 715 curr_on = on; 716 } 717 718 #if !MSDOS_COMPILER 719 /* 720 * Some glue to prevent calling termcap functions if tgetent() failed. 721 */ 722 static int hardcopy; 723 724 static char * ltget_env(char *capname) 725 { 726 char name[64]; 727 728 if (termcap_debug) 729 { 730 struct env { struct env *next; char *name; char *value; }; 731 static struct env *envs = NULL; 732 struct env *p; 733 for (p = envs; p != NULL; p = p->next) 734 if (strcmp(p->name, capname) == 0) 735 return p->value; 736 p = (struct env *) ecalloc(1, sizeof(struct env)); 737 p->name = save(capname); 738 p->value = (char *) ecalloc(strlen(capname)+3, sizeof(char)); 739 sprintf(p->value, "<%s>", capname); 740 p->next = envs; 741 envs = p; 742 return p->value; 743 } 744 SNPRINTF1(name, sizeof(name), "LESS_TERMCAP_%s", capname); 745 return (lgetenv(name)); 746 } 747 748 static int ltgetflag(char *capname) 749 { 750 char *s; 751 752 if ((s = ltget_env(capname)) != NULL) 753 return (*s != '\0' && *s != '0'); 754 if (hardcopy) 755 return (0); 756 return (tgetflag(capname)); 757 } 758 759 static int ltgetnum(char *capname) 760 { 761 char *s; 762 763 if ((s = ltget_env(capname)) != NULL) 764 return (atoi(s)); 765 if (hardcopy) 766 return (-1); 767 return (tgetnum(capname)); 768 } 769 770 static char * ltgetstr(char *capname, char **pp) 771 { 772 char *s; 773 774 if ((s = ltget_env(capname)) != NULL) 775 return (s); 776 if (hardcopy) 777 return (NULL); 778 return (tgetstr(capname, pp)); 779 } 780 #endif /* MSDOS_COMPILER */ 781 782 /* 783 * Get size of the output screen. 784 */ 785 public void scrsize(void) 786 { 787 char *s; 788 int sys_height; 789 int sys_width; 790 #if !MSDOS_COMPILER 791 int n; 792 #endif 793 794 #define DEF_SC_WIDTH 80 795 #if MSDOS_COMPILER 796 #define DEF_SC_HEIGHT 25 797 #else 798 #define DEF_SC_HEIGHT 24 799 #endif 800 801 802 sys_width = sys_height = 0; 803 804 #if LESSTEST 805 if (ttyin_name != NULL) 806 #endif /*LESSTEST*/ 807 { 808 #if MSDOS_COMPILER==MSOFTC 809 { 810 struct videoconfig w; 811 _getvideoconfig(&w); 812 sys_height = w.numtextrows; 813 sys_width = w.numtextcols; 814 } 815 #else 816 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 817 { 818 struct text_info w; 819 gettextinfo(&w); 820 sys_height = w.screenheight; 821 sys_width = w.screenwidth; 822 } 823 #else 824 #if MSDOS_COMPILER==WIN32C 825 { 826 CONSOLE_SCREEN_BUFFER_INFO scr; 827 GetConsoleScreenBufferInfo(con_out, &scr); 828 sys_height = scr.srWindow.Bottom - scr.srWindow.Top + 1; 829 sys_width = scr.srWindow.Right - scr.srWindow.Left + 1; 830 } 831 #else 832 #if OS2 833 { 834 int s[2]; 835 _scrsize(s); 836 sys_width = s[0]; 837 sys_height = s[1]; 838 /* 839 * When using terminal emulators for XFree86/OS2, the 840 * _scrsize function does not work well. 841 * Call the scrsize.exe program to get the window size. 842 */ 843 windowid = getenv("WINDOWID"); 844 if (windowid != NULL) 845 { 846 FILE *fd = popen("scrsize", "rt"); 847 if (fd != NULL) 848 { 849 int w, h; 850 fscanf(fd, "%i %i", &w, &h); 851 if (w > 0 && h > 0) 852 { 853 sys_width = w; 854 sys_height = h; 855 } 856 pclose(fd); 857 } 858 } 859 } 860 #else 861 #ifdef TIOCGWINSZ 862 { 863 struct winsize w; 864 if (ioctl(2, TIOCGWINSZ, &w) == 0) 865 { 866 if (w.ws_row > 0) 867 sys_height = w.ws_row; 868 if (w.ws_col > 0) 869 sys_width = w.ws_col; 870 } 871 } 872 #else 873 #ifdef WIOCGETD 874 { 875 struct uwdata w; 876 if (ioctl(2, WIOCGETD, &w) == 0) 877 { 878 if (w.uw_height > 0) 879 sys_height = w.uw_height / w.uw_vs; 880 if (w.uw_width > 0) 881 sys_width = w.uw_width / w.uw_hs; 882 } 883 } 884 #endif 885 #endif 886 #endif 887 #endif 888 #endif 889 #endif 890 } 891 892 if (sys_height > 0) 893 sc_height = sys_height; 894 else if ((s = lgetenv("LINES")) != NULL) 895 sc_height = atoi(s); 896 #if !MSDOS_COMPILER 897 else if ((n = ltgetnum("li")) > 0) 898 sc_height = n; 899 #endif 900 if ((s = lgetenv("LESS_LINES")) != NULL) 901 { 902 int height = atoi(s); 903 sc_height = (height < 0) ? sc_height + height : height; 904 full_screen = FALSE; 905 } 906 if (sc_height <= 0) 907 sc_height = DEF_SC_HEIGHT; 908 909 if (sys_width > 0) 910 sc_width = sys_width; 911 else if ((s = lgetenv("COLUMNS")) != NULL) 912 sc_width = atoi(s); 913 #if !MSDOS_COMPILER 914 else if ((n = ltgetnum("co")) > 0) 915 sc_width = n; 916 #endif 917 if ((s = lgetenv("LESS_COLUMNS")) != NULL) 918 { 919 int width = atoi(s); 920 sc_width = (width < 0) ? sc_width + width : width; 921 } 922 if (sc_width <= 0) 923 sc_width = DEF_SC_WIDTH; 924 } 925 926 #if MSDOS_COMPILER==MSOFTC 927 /* 928 * Figure out how many empty loops it takes to delay a millisecond. 929 */ 930 static void get_clock(void) 931 { 932 clock_t start; 933 934 /* 935 * Get synchronized at the start of a tick. 936 */ 937 start = clock(); 938 while (clock() == start) 939 ; 940 /* 941 * Now count loops till the next tick. 942 */ 943 start = clock(); 944 msec_loops = 0; 945 while (clock() == start) 946 msec_loops++; 947 /* 948 * Convert from (loops per clock) to (loops per millisecond). 949 */ 950 msec_loops *= CLOCKS_PER_SEC; 951 msec_loops /= 1000; 952 } 953 954 /* 955 * Delay for a specified number of milliseconds. 956 */ 957 static void delay(int msec) 958 { 959 long i; 960 961 while (msec-- > 0) 962 { 963 for (i = 0; i < msec_loops; i++) 964 (void) clock(); 965 } 966 } 967 #endif 968 969 /* 970 * Return the characters actually input by a "special" key. 971 */ 972 public char * special_key_str(int key) 973 { 974 static char tbuf[40]; 975 char *s; 976 #if MSDOS_COMPILER || OS2 977 static char k_right[] = { '\340', PCK_RIGHT, 0 }; 978 static char k_left[] = { '\340', PCK_LEFT, 0 }; 979 static char k_ctl_right[] = { '\340', PCK_CTL_RIGHT, 0 }; 980 static char k_ctl_left[] = { '\340', PCK_CTL_LEFT, 0 }; 981 static char k_insert[] = { '\340', PCK_INSERT, 0 }; 982 static char k_delete[] = { '\340', PCK_DELETE, 0 }; 983 static char k_ctl_delete[] = { '\340', PCK_CTL_DELETE, 0 }; 984 static char k_ctl_backspace[] = { '\177', 0 }; 985 static char k_backspace[] = { '\b', 0 }; 986 static char k_home[] = { '\340', PCK_HOME, 0 }; 987 static char k_end[] = { '\340', PCK_END, 0 }; 988 static char k_up[] = { '\340', PCK_UP, 0 }; 989 static char k_down[] = { '\340', PCK_DOWN, 0 }; 990 static char k_backtab[] = { '\340', PCK_SHIFT_TAB, 0 }; 991 static char k_pagedown[] = { '\340', PCK_PAGEDOWN, 0 }; 992 static char k_pageup[] = { '\340', PCK_PAGEUP, 0 }; 993 static char k_f1[] = { '\340', PCK_F1, 0 }; 994 #endif 995 #if !MSDOS_COMPILER 996 char *sp = tbuf; 997 #endif 998 999 switch (key) 1000 { 1001 #if OS2 1002 /* 1003 * If windowid is not NULL, assume less is executed in 1004 * the XFree86 environment. 1005 */ 1006 case SK_RIGHT_ARROW: 1007 s = windowid ? ltgetstr("kr", &sp) : k_right; 1008 break; 1009 case SK_LEFT_ARROW: 1010 s = windowid ? ltgetstr("kl", &sp) : k_left; 1011 break; 1012 case SK_UP_ARROW: 1013 s = windowid ? ltgetstr("ku", &sp) : k_up; 1014 break; 1015 case SK_DOWN_ARROW: 1016 s = windowid ? ltgetstr("kd", &sp) : k_down; 1017 break; 1018 case SK_PAGE_UP: 1019 s = windowid ? ltgetstr("kP", &sp) : k_pageup; 1020 break; 1021 case SK_PAGE_DOWN: 1022 s = windowid ? ltgetstr("kN", &sp) : k_pagedown; 1023 break; 1024 case SK_HOME: 1025 s = windowid ? ltgetstr("kh", &sp) : k_home; 1026 break; 1027 case SK_END: 1028 s = windowid ? ltgetstr("@7", &sp) : k_end; 1029 break; 1030 case SK_DELETE: 1031 s = windowid ? ltgetstr("kD", &sp) : k_delete; 1032 if (s == NULL) 1033 { 1034 tbuf[0] = '\177'; 1035 tbuf[1] = '\0'; 1036 s = tbuf; 1037 } 1038 break; 1039 #endif 1040 #if MSDOS_COMPILER 1041 case SK_RIGHT_ARROW: 1042 s = k_right; 1043 break; 1044 case SK_LEFT_ARROW: 1045 s = k_left; 1046 break; 1047 case SK_UP_ARROW: 1048 s = k_up; 1049 break; 1050 case SK_DOWN_ARROW: 1051 s = k_down; 1052 break; 1053 case SK_PAGE_UP: 1054 s = k_pageup; 1055 break; 1056 case SK_PAGE_DOWN: 1057 s = k_pagedown; 1058 break; 1059 case SK_HOME: 1060 s = k_home; 1061 break; 1062 case SK_END: 1063 s = k_end; 1064 break; 1065 case SK_DELETE: 1066 s = k_delete; 1067 break; 1068 #endif 1069 #if MSDOS_COMPILER || OS2 1070 case SK_INSERT: 1071 s = k_insert; 1072 break; 1073 case SK_CTL_LEFT_ARROW: 1074 s = k_ctl_left; 1075 break; 1076 case SK_CTL_RIGHT_ARROW: 1077 s = k_ctl_right; 1078 break; 1079 case SK_CTL_BACKSPACE: 1080 s = k_ctl_backspace; 1081 break; 1082 case SK_CTL_DELETE: 1083 s = k_ctl_delete; 1084 break; 1085 case SK_BACKSPACE: 1086 s = k_backspace; 1087 break; 1088 case SK_F1: 1089 s = k_f1; 1090 break; 1091 case SK_BACKTAB: 1092 s = k_backtab; 1093 break; 1094 #else 1095 case SK_RIGHT_ARROW: 1096 s = ltgetstr("kr", &sp); 1097 break; 1098 case SK_LEFT_ARROW: 1099 s = ltgetstr("kl", &sp); 1100 break; 1101 case SK_UP_ARROW: 1102 s = ltgetstr("ku", &sp); 1103 break; 1104 case SK_DOWN_ARROW: 1105 s = ltgetstr("kd", &sp); 1106 break; 1107 case SK_PAGE_UP: 1108 s = ltgetstr("kP", &sp); 1109 break; 1110 case SK_PAGE_DOWN: 1111 s = ltgetstr("kN", &sp); 1112 break; 1113 case SK_HOME: 1114 s = ltgetstr("kh", &sp); 1115 break; 1116 case SK_END: 1117 s = ltgetstr("@7", &sp); 1118 break; 1119 case SK_DELETE: 1120 s = ltgetstr("kD", &sp); 1121 if (s == NULL) 1122 { 1123 tbuf[0] = '\177'; 1124 tbuf[1] = '\0'; 1125 s = tbuf; 1126 } 1127 break; 1128 case SK_BACKSPACE: 1129 s = ltgetstr("kb", &sp); 1130 if (s == NULL) 1131 { 1132 tbuf[0] = '\b'; 1133 tbuf[1] = '\0'; 1134 s = tbuf; 1135 } 1136 break; 1137 #endif 1138 case SK_CONTROL_K: 1139 tbuf[0] = CONTROL('K'); 1140 tbuf[1] = '\0'; 1141 s = tbuf; 1142 break; 1143 default: 1144 return (NULL); 1145 } 1146 return (s); 1147 } 1148 1149 /* 1150 * Get terminal capabilities via termcap. 1151 */ 1152 public void get_term(void) 1153 { 1154 termcap_debug = !isnullenv(lgetenv("LESS_TERMCAP_DEBUG")); 1155 #if MSDOS_COMPILER 1156 auto_wrap = 1; 1157 ignaw = 0; 1158 can_goto_line = 1; 1159 clear_bg = 1; 1160 /* 1161 * Set up default colors. 1162 * The xx_s_width and xx_e_width vars are already initialized to 0. 1163 */ 1164 #if MSDOS_COMPILER==MSOFTC 1165 sy_bg_color = _getbkcolor(); 1166 sy_fg_color = _gettextcolor(); 1167 get_clock(); 1168 #else 1169 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 1170 { 1171 struct text_info w; 1172 gettextinfo(&w); 1173 sy_bg_color = (w.attribute >> 4) & 0x0F; 1174 sy_fg_color = (w.attribute >> 0) & 0x0F; 1175 } 1176 #else 1177 #if MSDOS_COMPILER==WIN32C 1178 { 1179 CONSOLE_SCREEN_BUFFER_INFO scr; 1180 1181 con_out_save = con_out = GetStdHandle(STD_OUTPUT_HANDLE); 1182 /* 1183 * Always open stdin in binary. Note this *must* be done 1184 * before any file operations have been done on fd0. 1185 */ 1186 SET_BINARY(0); 1187 GetConsoleMode(con_out, &init_output_mode); 1188 GetConsoleScreenBufferInfo(con_out, &scr); 1189 curr_attr = scr.wAttributes; 1190 sy_bg_color = (curr_attr & BG_COLORS) >> 4; /* normalize */ 1191 sy_fg_color = curr_attr & FG_COLORS; 1192 } 1193 #endif 1194 #endif 1195 #endif 1196 nm_fg_color = sy_fg_color; 1197 nm_bg_color = sy_bg_color; 1198 bo_fg_color = 11; 1199 bo_bg_color = 0; 1200 ul_fg_color = 9; 1201 ul_bg_color = 0; 1202 so_fg_color = 15; 1203 so_bg_color = 9; 1204 bl_fg_color = 15; 1205 bl_bg_color = 0; 1206 sgr_mode = 0; 1207 1208 /* 1209 * Get size of the screen. 1210 */ 1211 scrsize(); 1212 pos_init(); 1213 1214 1215 #else /* !MSDOS_COMPILER */ 1216 { 1217 char *sp; 1218 char *t1, *t2; 1219 char *term; 1220 /* 1221 * Some termcap libraries assume termbuf is static 1222 * (accessible after tgetent returns). 1223 */ 1224 static char termbuf[TERMBUF_SIZE]; 1225 static char sbuf[TERMSBUF_SIZE]; 1226 1227 #if OS2 1228 /* 1229 * Make sure the termcap database is available. 1230 */ 1231 sp = lgetenv("TERMCAP"); 1232 if (isnullenv(sp)) 1233 { 1234 char *termcap; 1235 if ((sp = homefile("termcap.dat")) != NULL) 1236 { 1237 termcap = (char *) ecalloc(strlen(sp)+9, sizeof(char)); 1238 sprintf(termcap, "TERMCAP=%s", sp); 1239 free(sp); 1240 putenv(termcap); 1241 } 1242 } 1243 #endif 1244 /* 1245 * Find out what kind of terminal this is. 1246 */ 1247 if ((term = lgetenv("TERM")) == NULL) 1248 term = DEFAULT_TERM; 1249 hardcopy = 0; 1250 /* {{ Should probably just pass NULL instead of termbuf. }} */ 1251 if (tgetent(termbuf, term) != TGETENT_OK) 1252 hardcopy = 1; 1253 if (ltgetflag("hc")) 1254 hardcopy = 1; 1255 1256 /* 1257 * Get size of the screen. 1258 */ 1259 scrsize(); 1260 pos_init(); 1261 1262 auto_wrap = ltgetflag("am"); 1263 ignaw = ltgetflag("xn"); 1264 above_mem = ltgetflag("da"); 1265 below_mem = ltgetflag("db"); 1266 clear_bg = ltgetflag("ut"); 1267 no_alt_screen = ltgetflag("NR"); 1268 1269 /* 1270 * Assumes termcap variable "sg" is the printing width of: 1271 * the standout sequence, the end standout sequence, 1272 * the underline sequence, the end underline sequence, 1273 * the boldface sequence, and the end boldface sequence. 1274 */ 1275 if ((so_s_width = ltgetnum("sg")) < 0) 1276 so_s_width = 0; 1277 so_e_width = so_s_width; 1278 1279 bo_s_width = bo_e_width = so_s_width; 1280 ul_s_width = ul_e_width = so_s_width; 1281 bl_s_width = bl_e_width = so_s_width; 1282 1283 #if HILITE_SEARCH 1284 if (so_s_width > 0 || so_e_width > 0) 1285 /* 1286 * Disable highlighting by default on magic cookie terminals. 1287 * Turning on highlighting might change the displayed width 1288 * of a line, causing the display to get messed up. 1289 * The user can turn it back on with -g, 1290 * but she won't like the results. 1291 */ 1292 hilite_search = 0; 1293 #endif 1294 1295 /* 1296 * Get various string-valued capabilities. 1297 */ 1298 sp = sbuf; 1299 1300 #if HAVE_OSPEED 1301 sc_pad = ltgetstr("pc", &sp); 1302 if (sc_pad != NULL) 1303 PC = *sc_pad; 1304 #endif 1305 1306 sc_s_keypad = ltgetstr("ks", &sp); 1307 if (sc_s_keypad == NULL) 1308 sc_s_keypad = ""; 1309 sc_e_keypad = ltgetstr("ke", &sp); 1310 if (sc_e_keypad == NULL) 1311 sc_e_keypad = ""; 1312 kent = ltgetstr("@8", &sp); 1313 1314 sc_s_mousecap = ltgetstr("MOUSE_START", &sp); 1315 if (sc_s_mousecap == NULL) 1316 sc_s_mousecap = ESCS "[?1000h" ESCS "[?1006h"; 1317 sc_e_mousecap = ltgetstr("MOUSE_END", &sp); 1318 if (sc_e_mousecap == NULL) 1319 sc_e_mousecap = ESCS "[?1006l" ESCS "[?1000l"; 1320 1321 sc_init = ltgetstr("ti", &sp); 1322 if (sc_init == NULL) 1323 sc_init = ""; 1324 1325 sc_deinit= ltgetstr("te", &sp); 1326 if (sc_deinit == NULL) 1327 sc_deinit = ""; 1328 1329 sc_eol_clear = ltgetstr("ce", &sp); 1330 if (sc_eol_clear == NULL || *sc_eol_clear == '\0') 1331 { 1332 missing_cap = 1; 1333 sc_eol_clear = ""; 1334 } 1335 1336 sc_eos_clear = ltgetstr("cd", &sp); 1337 if (below_mem && (sc_eos_clear == NULL || *sc_eos_clear == '\0')) 1338 { 1339 missing_cap = 1; 1340 sc_eos_clear = ""; 1341 } 1342 1343 sc_clear = ltgetstr("cl", &sp); 1344 if (sc_clear == NULL || *sc_clear == '\0') 1345 { 1346 missing_cap = 1; 1347 sc_clear = "\n\n"; 1348 } 1349 1350 sc_move = ltgetstr("cm", &sp); 1351 if (sc_move == NULL || *sc_move == '\0') 1352 { 1353 /* 1354 * This is not an error here, because we don't 1355 * always need sc_move. 1356 * We need it only if we don't have home or lower-left. 1357 */ 1358 sc_move = ""; 1359 can_goto_line = 0; 1360 } else 1361 can_goto_line = 1; 1362 1363 tmodes("so", "se", &sc_s_in, &sc_s_out, "", "", &sp); 1364 tmodes("us", "ue", &sc_u_in, &sc_u_out, sc_s_in, sc_s_out, &sp); 1365 tmodes("md", "me", &sc_b_in, &sc_b_out, sc_s_in, sc_s_out, &sp); 1366 tmodes("mb", "me", &sc_bl_in, &sc_bl_out, sc_s_in, sc_s_out, &sp); 1367 1368 sc_visual_bell = ltgetstr("vb", &sp); 1369 if (sc_visual_bell == NULL) 1370 sc_visual_bell = ""; 1371 1372 if (ltgetflag("bs")) 1373 sc_backspace = "\b"; 1374 else 1375 { 1376 sc_backspace = ltgetstr("bc", &sp); 1377 if (sc_backspace == NULL || *sc_backspace == '\0') 1378 sc_backspace = "\b"; 1379 } 1380 1381 /* 1382 * Choose between using "ho" and "cm" ("home" and "cursor move") 1383 * to move the cursor to the upper left corner of the screen. 1384 */ 1385 t1 = ltgetstr("ho", &sp); 1386 if (t1 == NULL) 1387 t1 = ""; 1388 if (*sc_move == '\0') 1389 t2 = ""; 1390 else 1391 { 1392 strcpy(sp, tgoto(sc_move, 0, 0)); 1393 t2 = sp; 1394 sp += strlen(sp) + 1; 1395 } 1396 sc_home = cheaper(t1, t2, "|\b^"); 1397 1398 /* 1399 * Choose between using "ll" and "cm" ("lower left" and "cursor move") 1400 * to move the cursor to the lower left corner of the screen. 1401 */ 1402 t1 = ltgetstr("ll", &sp); 1403 if (t1 == NULL || !full_screen) 1404 t1 = ""; 1405 if (*sc_move == '\0') 1406 t2 = ""; 1407 else 1408 { 1409 strcpy(sp, tgoto(sc_move, 0, sc_height-1)); 1410 t2 = sp; 1411 sp += strlen(sp) + 1; 1412 } 1413 sc_lower_left = cheaper(t1, t2, "\r"); 1414 1415 /* 1416 * Get carriage return string. 1417 */ 1418 sc_return = ltgetstr("cr", &sp); 1419 if (sc_return == NULL) 1420 sc_return = "\r"; 1421 1422 /* 1423 * Choose between using "al" or "sr" ("add line" or "scroll reverse") 1424 * to add a line at the top of the screen. 1425 */ 1426 t1 = ltgetstr("al", &sp); 1427 if (t1 == NULL) 1428 t1 = ""; 1429 t2 = ltgetstr("sr", &sp); 1430 if (t2 == NULL) 1431 t2 = ""; 1432 #if OS2 1433 if (*t1 == '\0' && *t2 == '\0') 1434 sc_addline = ""; 1435 else 1436 #endif 1437 if (above_mem) 1438 sc_addline = t1; 1439 else 1440 sc_addline = cheaper(t1, t2, ""); 1441 if (*sc_addline == '\0') 1442 { 1443 /* 1444 * Force repaint on any backward movement. 1445 */ 1446 no_back_scroll = 1; 1447 } 1448 } 1449 #endif /* MSDOS_COMPILER */ 1450 } 1451 1452 #if !MSDOS_COMPILER 1453 /* 1454 * Return the cost of displaying a termcap string. 1455 * We use the trick of calling tputs, but as a char printing function 1456 * we give it inc_costcount, which just increments "costcount". 1457 * This tells us how many chars would be printed by using this string. 1458 * {{ Couldn't we just use strlen? }} 1459 */ 1460 static int costcount; 1461 1462 /*ARGSUSED*/ 1463 static int inc_costcount(int c) 1464 { 1465 costcount++; 1466 return (c); 1467 } 1468 1469 static int cost(char *t) 1470 { 1471 costcount = 0; 1472 tputs(t, sc_height, inc_costcount); 1473 return (costcount); 1474 } 1475 1476 /* 1477 * Return the "best" of the two given termcap strings. 1478 * The best, if both exist, is the one with the lower 1479 * cost (see cost() function). 1480 */ 1481 static char * cheaper(char *t1, char *t2, char *def) 1482 { 1483 if (*t1 == '\0' && *t2 == '\0') 1484 { 1485 missing_cap = 1; 1486 return (def); 1487 } 1488 if (*t1 == '\0') 1489 return (t2); 1490 if (*t2 == '\0') 1491 return (t1); 1492 if (cost(t1) < cost(t2)) 1493 return (t1); 1494 return (t2); 1495 } 1496 1497 static void tmodes(char *incap, char *outcap, char **instr, char **outstr, char *def_instr, char *def_outstr, char **spp) 1498 { 1499 *instr = ltgetstr(incap, spp); 1500 if (*instr == NULL) 1501 { 1502 /* Use defaults. */ 1503 *instr = def_instr; 1504 *outstr = def_outstr; 1505 return; 1506 } 1507 1508 *outstr = ltgetstr(outcap, spp); 1509 if (*outstr == NULL) 1510 /* No specific out capability; use "me". */ 1511 *outstr = ltgetstr("me", spp); 1512 if (*outstr == NULL) 1513 /* Don't even have "me"; use a null string. */ 1514 *outstr = ""; 1515 } 1516 1517 #endif /* MSDOS_COMPILER */ 1518 1519 1520 /* 1521 * Below are the functions which perform all the 1522 * terminal-specific screen manipulation. 1523 */ 1524 1525 1526 #if MSDOS_COMPILER 1527 1528 #if MSDOS_COMPILER==WIN32C 1529 static void _settextposition(int row, int col) 1530 { 1531 COORD cpos; 1532 CONSOLE_SCREEN_BUFFER_INFO csbi; 1533 1534 GetConsoleScreenBufferInfo(con_out, &csbi); 1535 cpos.X = csbi.srWindow.Left + (col - 1); 1536 cpos.Y = csbi.srWindow.Top + (row - 1); 1537 SetConsoleCursorPosition(con_out, cpos); 1538 } 1539 #endif 1540 1541 /* 1542 * Initialize the screen to the correct color at startup. 1543 */ 1544 static void initcolor(void) 1545 { 1546 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 1547 intensevideo(); 1548 #endif 1549 SETCOLORS(nm_fg_color, nm_bg_color); 1550 #if 0 1551 /* 1552 * This clears the screen at startup. This is different from 1553 * the behavior of other versions of less. Disable it for now. 1554 */ 1555 char *blanks; 1556 int row; 1557 int col; 1558 1559 /* 1560 * Create a complete, blank screen using "normal" colors. 1561 */ 1562 SETCOLORS(nm_fg_color, nm_bg_color); 1563 blanks = (char *) ecalloc(width+1, sizeof(char)); 1564 for (col = 0; col < sc_width; col++) 1565 blanks[col] = ' '; 1566 blanks[sc_width] = '\0'; 1567 for (row = 0; row < sc_height; row++) 1568 _outtext(blanks); 1569 free(blanks); 1570 #endif 1571 } 1572 #endif 1573 1574 #if MSDOS_COMPILER==WIN32C 1575 1576 /* 1577 * Enable virtual terminal processing, if available. 1578 */ 1579 static void win32_init_vt_term(void) 1580 { 1581 DWORD output_mode; 1582 1583 if (vt_enabled == 0 || (vt_enabled == 1 && con_out == con_out_ours)) 1584 return; 1585 1586 GetConsoleMode(con_out, &output_mode); 1587 vt_enabled = SetConsoleMode(con_out, 1588 output_mode | ENABLE_VIRTUAL_TERMINAL_PROCESSING); 1589 if (vt_enabled) 1590 { 1591 auto_wrap = 0; 1592 ignaw = 1; 1593 } 1594 } 1595 1596 static void win32_deinit_vt_term(void) 1597 { 1598 if (vt_enabled == 1 && con_out == con_out_save) 1599 SetConsoleMode(con_out, init_output_mode); 1600 } 1601 1602 /* 1603 * Termcap-like init with a private win32 console. 1604 */ 1605 static void win32_init_term(void) 1606 { 1607 CONSOLE_SCREEN_BUFFER_INFO scr; 1608 COORD size; 1609 1610 if (con_out_save == INVALID_HANDLE_VALUE) 1611 return; 1612 1613 GetConsoleScreenBufferInfo(con_out_save, &scr); 1614 1615 if (con_out_ours == INVALID_HANDLE_VALUE) 1616 { 1617 /* 1618 * Create our own screen buffer, so that we 1619 * may restore the original when done. 1620 */ 1621 con_out_ours = CreateConsoleScreenBuffer( 1622 GENERIC_WRITE | GENERIC_READ, 1623 FILE_SHARE_WRITE | FILE_SHARE_READ, 1624 (LPSECURITY_ATTRIBUTES) NULL, 1625 CONSOLE_TEXTMODE_BUFFER, 1626 (LPVOID) NULL); 1627 } 1628 1629 size.X = scr.srWindow.Right - scr.srWindow.Left + 1; 1630 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1; 1631 SetConsoleScreenBufferSize(con_out_ours, size); 1632 SetConsoleActiveScreenBuffer(con_out_ours); 1633 con_out = con_out_ours; 1634 } 1635 1636 /* 1637 * Restore the startup console. 1638 */ 1639 static void win32_deinit_term(void) 1640 { 1641 if (con_out_save == INVALID_HANDLE_VALUE) 1642 return; 1643 if (quitting) 1644 (void) CloseHandle(con_out_ours); 1645 SetConsoleActiveScreenBuffer(con_out_save); 1646 con_out = con_out_save; 1647 } 1648 1649 #endif 1650 1651 #if !MSDOS_COMPILER 1652 static void do_tputs(char *str, int affcnt, int (*f_putc)(int)) 1653 { 1654 #if LESSTEST 1655 if (ttyin_name != NULL && f_putc == putchr) 1656 putstr(str); 1657 else 1658 #endif /*LESSTEST*/ 1659 tputs(str, affcnt, f_putc); 1660 } 1661 1662 /* 1663 * Like tputs but we handle $<...> delay strings here because 1664 * some implementations of tputs don't perform delays correctly. 1665 */ 1666 static void ltputs(char *str, int affcnt, int (*f_putc)(int)) 1667 { 1668 while (str != NULL && *str != '\0') 1669 { 1670 #if HAVE_STRSTR 1671 char *obrac = strstr(str, "$<"); 1672 if (obrac != NULL) 1673 { 1674 char str2[64]; 1675 int slen = obrac - str; 1676 if (slen < sizeof(str2)) 1677 { 1678 int delay; 1679 /* Output first part of string (before "$<"). */ 1680 memcpy(str2, str, slen); 1681 str2[slen] = '\0'; 1682 do_tputs(str2, affcnt, f_putc); 1683 str += slen + 2; 1684 /* Perform the delay. */ 1685 delay = lstrtoi(str, &str, 10); 1686 if (*str == '*') 1687 if (ckd_mul(&delay, delay, affcnt)) 1688 delay = INT_MAX; 1689 flush(); 1690 sleep_ms(delay); 1691 /* Skip past closing ">" at end of delay string. */ 1692 str = strstr(str, ">"); 1693 if (str != NULL) 1694 str++; 1695 continue; 1696 } 1697 } 1698 #endif 1699 /* Pass the rest of the string to tputs and we're done. */ 1700 do_tputs(str, affcnt, f_putc); 1701 break; 1702 } 1703 } 1704 #endif /* MSDOS_COMPILER */ 1705 1706 /* 1707 * Configure the terminal so mouse clicks and wheel moves 1708 * produce input to less. 1709 */ 1710 public void init_mouse(void) 1711 { 1712 #if !MSDOS_COMPILER 1713 ltputs(sc_s_mousecap, sc_height, putchr); 1714 #else 1715 #if MSDOS_COMPILER==WIN32C 1716 SetConsoleMode(tty, ENABLE_PROCESSED_INPUT | ENABLE_MOUSE_INPUT 1717 | ENABLE_EXTENDED_FLAGS /* disable quick edit */); 1718 1719 #endif 1720 #endif 1721 } 1722 1723 /* 1724 * Configure the terminal so mouse clicks and wheel moves 1725 * are handled by the system (so text can be selected, etc). 1726 */ 1727 public void deinit_mouse(void) 1728 { 1729 #if !MSDOS_COMPILER 1730 ltputs(sc_e_mousecap, sc_height, putchr); 1731 #else 1732 #if MSDOS_COMPILER==WIN32C 1733 SetConsoleMode(tty, ENABLE_PROCESSED_INPUT | ENABLE_EXTENDED_FLAGS 1734 | (console_mode & ENABLE_QUICK_EDIT_MODE)); 1735 #endif 1736 #endif 1737 } 1738 1739 /* 1740 * Initialize terminal 1741 */ 1742 public void init(void) 1743 { 1744 clear_bot_if_needed(); 1745 #if !MSDOS_COMPILER 1746 if (!(quit_if_one_screen && one_screen)) 1747 { 1748 if (!no_init) 1749 { 1750 ltputs(sc_init, sc_height, putchr); 1751 /* 1752 * Some terminals leave the cursor unmoved when switching 1753 * to the alt screen. To avoid having the text appear at 1754 * a seemingly random line on the alt screen, move to 1755 * lower left if we are using an alt screen. 1756 */ 1757 if (*sc_init != '\0' && *sc_deinit != '\0' && !no_alt_screen) 1758 lower_left(); 1759 term_init_done = 1; 1760 } 1761 if (!no_keypad) 1762 ltputs(sc_s_keypad, sc_height, putchr); 1763 if (mousecap) 1764 init_mouse(); 1765 } 1766 init_done = 1; 1767 if (top_scroll) 1768 { 1769 int i; 1770 1771 /* 1772 * This is nice to terminals with no alternate screen, 1773 * but with saved scrolled-off-the-top lines. This way, 1774 * no previous line is lost, but we start with a whole 1775 * screen to ourself. 1776 */ 1777 for (i = 1; i < sc_height; i++) 1778 putchr('\n'); 1779 } else 1780 line_left(); 1781 #else 1782 #if MSDOS_COMPILER==WIN32C 1783 if (!(quit_if_one_screen && one_screen)) 1784 { 1785 if (!no_init) 1786 { 1787 win32_init_term(); 1788 term_init_done = 1; 1789 } 1790 if (mousecap) 1791 init_mouse(); 1792 1793 } 1794 win32_init_vt_term(); 1795 #endif 1796 init_done = 1; 1797 initcolor(); 1798 flush(); 1799 #endif 1800 } 1801 1802 /* 1803 * Deinitialize terminal 1804 */ 1805 public void deinit(void) 1806 { 1807 if (!init_done) 1808 return; 1809 #if !MSDOS_COMPILER 1810 if (!(quit_if_one_screen && one_screen)) 1811 { 1812 if (mousecap) 1813 deinit_mouse(); 1814 if (!no_keypad) 1815 ltputs(sc_e_keypad, sc_height, putchr); 1816 if (!no_init) 1817 ltputs(sc_deinit, sc_height, putchr); 1818 } 1819 #else 1820 /* Restore system colors. */ 1821 SETCOLORS(sy_fg_color, sy_bg_color); 1822 #if MSDOS_COMPILER==WIN32C 1823 win32_deinit_vt_term(); 1824 if (!(quit_if_one_screen && one_screen)) 1825 { 1826 if (mousecap) 1827 deinit_mouse(); 1828 if (!no_init) 1829 win32_deinit_term(); 1830 } 1831 #else 1832 /* Need clreol to make SETCOLORS take effect. */ 1833 clreol(); 1834 #endif 1835 #endif 1836 init_done = 0; 1837 } 1838 1839 /* 1840 * Are we interactive (ie. writing to an initialized tty)? 1841 */ 1842 public int interactive(void) 1843 { 1844 return (is_tty && init_done); 1845 } 1846 1847 static void assert_interactive(void) 1848 { 1849 if (interactive()) return; 1850 /* abort(); */ 1851 } 1852 1853 /* 1854 * Home cursor (move to upper left corner of screen). 1855 */ 1856 public void home(void) 1857 { 1858 assert_interactive(); 1859 #if !MSDOS_COMPILER 1860 ltputs(sc_home, 1, putchr); 1861 #else 1862 flush(); 1863 _settextposition(1,1); 1864 #endif 1865 } 1866 1867 #if LESSTEST 1868 public void dump_screen(void) 1869 { 1870 char dump_cmd[32]; 1871 SNPRINTF1(dump_cmd, sizeof(dump_cmd), ESCS"0;0;%dR", sc_width * sc_height); 1872 ltputs(dump_cmd, sc_height, putchr); 1873 flush(); 1874 } 1875 #endif /*LESSTEST*/ 1876 1877 /* 1878 * Add a blank line (called with cursor at home). 1879 * Should scroll the display down. 1880 */ 1881 public void add_line(void) 1882 { 1883 assert_interactive(); 1884 #if !MSDOS_COMPILER 1885 ltputs(sc_addline, sc_height, putchr); 1886 #else 1887 flush(); 1888 #if MSDOS_COMPILER==MSOFTC 1889 _scrolltextwindow(_GSCROLLDOWN); 1890 _settextposition(1,1); 1891 #else 1892 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 1893 movetext(1,1, sc_width,sc_height-1, 1,2); 1894 gotoxy(1,1); 1895 clreol(); 1896 #else 1897 #if MSDOS_COMPILER==WIN32C 1898 { 1899 CHAR_INFO fillchar; 1900 SMALL_RECT rcSrc, rcClip; 1901 COORD new_org; 1902 CONSOLE_SCREEN_BUFFER_INFO csbi; 1903 1904 GetConsoleScreenBufferInfo(con_out,&csbi); 1905 1906 /* The clip rectangle is the entire visible screen. */ 1907 rcClip.Left = csbi.srWindow.Left; 1908 rcClip.Top = csbi.srWindow.Top; 1909 rcClip.Right = csbi.srWindow.Right; 1910 rcClip.Bottom = csbi.srWindow.Bottom; 1911 1912 /* The source rectangle is the visible screen minus the last line. */ 1913 rcSrc = rcClip; 1914 rcSrc.Bottom--; 1915 1916 /* Move the top left corner of the source window down one row. */ 1917 new_org.X = rcSrc.Left; 1918 new_org.Y = rcSrc.Top + 1; 1919 1920 /* Fill the right character and attributes. */ 1921 fillchar.Char.AsciiChar = ' '; 1922 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 1923 fillchar.Attributes = curr_attr; 1924 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); 1925 _settextposition(1,1); 1926 } 1927 #endif 1928 #endif 1929 #endif 1930 #endif 1931 } 1932 1933 #if 0 1934 /* 1935 * Remove the n topmost lines and scroll everything below it in the 1936 * window upward. This is needed to stop leaking the topmost line 1937 * into the scrollback buffer when we go down-one-line (in WIN32). 1938 */ 1939 public void remove_top(int n) 1940 { 1941 #if MSDOS_COMPILER==WIN32C 1942 SMALL_RECT rcSrc, rcClip; 1943 CHAR_INFO fillchar; 1944 COORD new_org; 1945 CONSOLE_SCREEN_BUFFER_INFO csbi; /* to get buffer info */ 1946 1947 if (n >= sc_height - 1) 1948 { 1949 clear(); 1950 home(); 1951 return; 1952 } 1953 1954 flush(); 1955 1956 GetConsoleScreenBufferInfo(con_out, &csbi); 1957 1958 /* Get the extent of all-visible-rows-but-the-last. */ 1959 rcSrc.Left = csbi.srWindow.Left; 1960 rcSrc.Top = csbi.srWindow.Top + n; 1961 rcSrc.Right = csbi.srWindow.Right; 1962 rcSrc.Bottom = csbi.srWindow.Bottom; 1963 1964 /* Get the clip rectangle. */ 1965 rcClip.Left = rcSrc.Left; 1966 rcClip.Top = csbi.srWindow.Top; 1967 rcClip.Right = rcSrc.Right; 1968 rcClip.Bottom = rcSrc.Bottom ; 1969 1970 /* Move the source window up n rows. */ 1971 new_org.X = rcSrc.Left; 1972 new_org.Y = rcSrc.Top - n; 1973 1974 /* Fill the right character and attributes. */ 1975 fillchar.Char.AsciiChar = ' '; 1976 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 1977 fillchar.Attributes = curr_attr; 1978 1979 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); 1980 1981 /* Position cursor on first blank line. */ 1982 goto_line(sc_height - n - 1); 1983 #endif 1984 } 1985 #endif 1986 1987 #if MSDOS_COMPILER==WIN32C 1988 /* 1989 * Clear the screen. 1990 */ 1991 static void win32_clear(void) 1992 { 1993 /* 1994 * This will clear only the currently visible rows of the NT 1995 * console buffer, which means none of the precious scrollback 1996 * rows are touched making for faster scrolling. Note that, if 1997 * the window has fewer columns than the console buffer (i.e. 1998 * there is a horizontal scrollbar as well), the entire width 1999 * of the visible rows will be cleared. 2000 */ 2001 COORD topleft; 2002 DWORD nchars; 2003 DWORD winsz; 2004 CONSOLE_SCREEN_BUFFER_INFO csbi; 2005 2006 /* get the number of cells in the current buffer */ 2007 GetConsoleScreenBufferInfo(con_out, &csbi); 2008 winsz = csbi.dwSize.X * (csbi.srWindow.Bottom - csbi.srWindow.Top + 1); 2009 topleft.X = 0; 2010 topleft.Y = csbi.srWindow.Top; 2011 2012 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 2013 FillConsoleOutputCharacter(con_out, ' ', winsz, topleft, &nchars); 2014 FillConsoleOutputAttribute(con_out, curr_attr, winsz, topleft, &nchars); 2015 } 2016 2017 /* 2018 * Remove the n topmost lines and scroll everything below it in the 2019 * window upward. 2020 */ 2021 public void win32_scroll_up(int n) 2022 { 2023 SMALL_RECT rcSrc, rcClip; 2024 CHAR_INFO fillchar; 2025 COORD topleft; 2026 COORD new_org; 2027 DWORD nchars; 2028 DWORD size; 2029 CONSOLE_SCREEN_BUFFER_INFO csbi; 2030 2031 if (n <= 0) 2032 return; 2033 2034 if (n >= sc_height - 1) 2035 { 2036 win32_clear(); 2037 _settextposition(1,1); 2038 return; 2039 } 2040 2041 /* Get the extent of what will remain visible after scrolling. */ 2042 GetConsoleScreenBufferInfo(con_out, &csbi); 2043 rcSrc.Left = csbi.srWindow.Left; 2044 rcSrc.Top = csbi.srWindow.Top + n; 2045 rcSrc.Right = csbi.srWindow.Right; 2046 rcSrc.Bottom = csbi.srWindow.Bottom; 2047 2048 /* Get the clip rectangle. */ 2049 rcClip.Left = rcSrc.Left; 2050 rcClip.Top = csbi.srWindow.Top; 2051 rcClip.Right = rcSrc.Right; 2052 rcClip.Bottom = rcSrc.Bottom ; 2053 2054 /* Move the source text to the top of the screen. */ 2055 new_org.X = rcSrc.Left; 2056 new_org.Y = rcClip.Top; 2057 2058 /* Fill the right character and attributes. */ 2059 fillchar.Char.AsciiChar = ' '; 2060 fillchar.Attributes = MAKEATTR(nm_fg_color, nm_bg_color); 2061 2062 /* Scroll the window. */ 2063 SetConsoleTextAttribute(con_out, fillchar.Attributes); 2064 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); 2065 2066 /* Clear remaining lines at bottom. */ 2067 topleft.X = csbi.dwCursorPosition.X; 2068 topleft.Y = rcSrc.Bottom - n; 2069 size = (n * csbi.dwSize.X) + (rcSrc.Right - topleft.X); 2070 FillConsoleOutputCharacter(con_out, ' ', size, topleft, 2071 &nchars); 2072 FillConsoleOutputAttribute(con_out, fillchar.Attributes, size, topleft, 2073 &nchars); 2074 SetConsoleTextAttribute(con_out, curr_attr); 2075 2076 /* Move cursor n lines up from where it was. */ 2077 csbi.dwCursorPosition.Y -= n; 2078 SetConsoleCursorPosition(con_out, csbi.dwCursorPosition); 2079 } 2080 #endif 2081 2082 /* 2083 * Move cursor to lower left corner of screen. 2084 */ 2085 public void lower_left(void) 2086 { 2087 assert_interactive(); 2088 #if !MSDOS_COMPILER 2089 ltputs(sc_lower_left, 1, putchr); 2090 #else 2091 flush(); 2092 _settextposition(sc_height, 1); 2093 #endif 2094 } 2095 2096 /* 2097 * Move cursor to left position of current line. 2098 */ 2099 public void line_left(void) 2100 { 2101 assert_interactive(); 2102 #if !MSDOS_COMPILER 2103 ltputs(sc_return, 1, putchr); 2104 #else 2105 { 2106 int row; 2107 flush(); 2108 #if MSDOS_COMPILER==WIN32C 2109 { 2110 CONSOLE_SCREEN_BUFFER_INFO scr; 2111 GetConsoleScreenBufferInfo(con_out, &scr); 2112 row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1; 2113 } 2114 #else 2115 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 2116 row = wherey(); 2117 #else 2118 { 2119 struct rccoord tpos = _gettextposition(); 2120 row = tpos.row; 2121 } 2122 #endif 2123 #endif 2124 _settextposition(row, 1); 2125 } 2126 #endif 2127 } 2128 2129 /* 2130 * Check if the console size has changed and reset internals 2131 * (in lieu of SIGWINCH for WIN32). 2132 */ 2133 public void check_winch(void) 2134 { 2135 #if MSDOS_COMPILER==WIN32C 2136 CONSOLE_SCREEN_BUFFER_INFO scr; 2137 COORD size; 2138 2139 if (con_out == INVALID_HANDLE_VALUE) 2140 return; 2141 2142 flush(); 2143 GetConsoleScreenBufferInfo(con_out, &scr); 2144 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1; 2145 size.X = scr.srWindow.Right - scr.srWindow.Left + 1; 2146 if (size.Y != sc_height || size.X != sc_width) 2147 { 2148 sc_height = size.Y; 2149 sc_width = size.X; 2150 if (!no_init && con_out_ours == con_out) 2151 SetConsoleScreenBufferSize(con_out, size); 2152 pos_init(); 2153 wscroll = (sc_height + 1) / 2; 2154 screen_trashed = 1; 2155 } 2156 #endif 2157 } 2158 2159 /* 2160 * Goto a specific line on the screen. 2161 */ 2162 public void goto_line(int sindex) 2163 { 2164 assert_interactive(); 2165 #if !MSDOS_COMPILER 2166 ltputs(tgoto(sc_move, 0, sindex), 1, putchr); 2167 #else 2168 flush(); 2169 _settextposition(sindex+1, 1); 2170 #endif 2171 } 2172 2173 #if MSDOS_COMPILER==MSOFTC || MSDOS_COMPILER==BORLANDC 2174 /* 2175 * Create an alternate screen which is all white. 2176 * This screen is used to create a "flash" effect, by displaying it 2177 * briefly and then switching back to the normal screen. 2178 * {{ Yuck! There must be a better way to get a visual bell. }} 2179 */ 2180 static void create_flash(void) 2181 { 2182 #if MSDOS_COMPILER==MSOFTC 2183 struct videoconfig w; 2184 char *blanks; 2185 int row, col; 2186 2187 _getvideoconfig(&w); 2188 videopages = w.numvideopages; 2189 if (videopages < 2) 2190 { 2191 at_enter(AT_STANDOUT); 2192 at_exit(); 2193 } else 2194 { 2195 _setactivepage(1); 2196 at_enter(AT_STANDOUT); 2197 blanks = (char *) ecalloc(w.numtextcols, sizeof(char)); 2198 for (col = 0; col < w.numtextcols; col++) 2199 blanks[col] = ' '; 2200 for (row = w.numtextrows; row > 0; row--) 2201 _outmem(blanks, w.numtextcols); 2202 _setactivepage(0); 2203 _setvisualpage(0); 2204 free(blanks); 2205 at_exit(); 2206 } 2207 #else 2208 #if MSDOS_COMPILER==BORLANDC 2209 int n; 2210 2211 whitescreen = (unsigned short *) 2212 malloc(sc_width * sc_height * sizeof(short)); 2213 if (whitescreen == NULL) 2214 return; 2215 for (n = 0; n < sc_width * sc_height; n++) 2216 whitescreen[n] = 0x7020; 2217 #endif 2218 #endif 2219 flash_created = 1; 2220 } 2221 #endif /* MSDOS_COMPILER */ 2222 2223 /* 2224 * Output the "visual bell", if there is one. 2225 */ 2226 public void vbell(void) 2227 { 2228 if (no_vbell) 2229 return; 2230 #if !MSDOS_COMPILER 2231 if (*sc_visual_bell == '\0') 2232 return; 2233 ltputs(sc_visual_bell, sc_height, putchr); 2234 #else 2235 #if MSDOS_COMPILER==DJGPPC 2236 ScreenVisualBell(); 2237 #else 2238 #if MSDOS_COMPILER==MSOFTC 2239 /* 2240 * Create a flash screen on the second video page. 2241 * Switch to that page, then switch back. 2242 */ 2243 if (!flash_created) 2244 create_flash(); 2245 if (videopages < 2) 2246 return; 2247 _setvisualpage(1); 2248 delay(100); 2249 _setvisualpage(0); 2250 #else 2251 #if MSDOS_COMPILER==BORLANDC 2252 unsigned short *currscreen; 2253 2254 /* 2255 * Get a copy of the current screen. 2256 * Display the flash screen. 2257 * Then restore the old screen. 2258 */ 2259 if (!flash_created) 2260 create_flash(); 2261 if (whitescreen == NULL) 2262 return; 2263 currscreen = (unsigned short *) 2264 malloc(sc_width * sc_height * sizeof(short)); 2265 if (currscreen == NULL) return; 2266 gettext(1, 1, sc_width, sc_height, currscreen); 2267 puttext(1, 1, sc_width, sc_height, whitescreen); 2268 delay(100); 2269 puttext(1, 1, sc_width, sc_height, currscreen); 2270 free(currscreen); 2271 #else 2272 #if MSDOS_COMPILER==WIN32C 2273 /* paint screen with an inverse color */ 2274 clear(); 2275 2276 /* leave it displayed for 100 msec. */ 2277 Sleep(100); 2278 2279 /* restore with a redraw */ 2280 repaint(); 2281 #endif 2282 #endif 2283 #endif 2284 #endif 2285 #endif 2286 } 2287 2288 /* 2289 * Make a noise. 2290 */ 2291 static void beep(void) 2292 { 2293 #if !MSDOS_COMPILER 2294 putchr(CONTROL('G')); 2295 #else 2296 #if MSDOS_COMPILER==WIN32C 2297 MessageBeep(0); 2298 #else 2299 write(1, "\7", 1); 2300 #endif 2301 #endif 2302 } 2303 2304 /* 2305 * Ring the terminal bell. 2306 */ 2307 public void bell(void) 2308 { 2309 if (quiet == VERY_QUIET) 2310 vbell(); 2311 else 2312 beep(); 2313 } 2314 2315 /* 2316 * Clear the screen. 2317 */ 2318 public void clear(void) 2319 { 2320 assert_interactive(); 2321 #if !MSDOS_COMPILER 2322 ltputs(sc_clear, sc_height, putchr); 2323 #else 2324 flush(); 2325 #if MSDOS_COMPILER==WIN32C 2326 win32_clear(); 2327 #else 2328 _clearscreen(_GCLEARSCREEN); 2329 #endif 2330 #endif 2331 } 2332 2333 /* 2334 * Clear from the cursor to the end of the cursor's line. 2335 * {{ This must not move the cursor. }} 2336 */ 2337 public void clear_eol(void) 2338 { 2339 /* assert_interactive();*/ 2340 #if !MSDOS_COMPILER 2341 ltputs(sc_eol_clear, 1, putchr); 2342 #else 2343 #if MSDOS_COMPILER==MSOFTC 2344 short top, left; 2345 short bot, right; 2346 struct rccoord tpos; 2347 2348 flush(); 2349 /* 2350 * Save current state. 2351 */ 2352 tpos = _gettextposition(); 2353 _gettextwindow(&top, &left, &bot, &right); 2354 /* 2355 * Set a temporary window to the current line, 2356 * from the cursor's position to the right edge of the screen. 2357 * Then clear that window. 2358 */ 2359 _settextwindow(tpos.row, tpos.col, tpos.row, sc_width); 2360 _clearscreen(_GWINDOW); 2361 /* 2362 * Restore state. 2363 */ 2364 _settextwindow(top, left, bot, right); 2365 _settextposition(tpos.row, tpos.col); 2366 #else 2367 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 2368 flush(); 2369 clreol(); 2370 #else 2371 #if MSDOS_COMPILER==WIN32C 2372 DWORD nchars; 2373 COORD cpos; 2374 CONSOLE_SCREEN_BUFFER_INFO scr; 2375 2376 flush(); 2377 memset(&scr, 0, sizeof(scr)); 2378 GetConsoleScreenBufferInfo(con_out, &scr); 2379 cpos.X = scr.dwCursorPosition.X; 2380 cpos.Y = scr.dwCursorPosition.Y; 2381 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 2382 FillConsoleOutputAttribute(con_out, curr_attr, 2383 scr.dwSize.X - cpos.X, cpos, &nchars); 2384 FillConsoleOutputCharacter(con_out, ' ', 2385 scr.dwSize.X - cpos.X, cpos, &nchars); 2386 #endif 2387 #endif 2388 #endif 2389 #endif 2390 } 2391 2392 /* 2393 * Clear the current line. 2394 * Clear the screen if there's off-screen memory below the display. 2395 */ 2396 static void clear_eol_bot(void) 2397 { 2398 assert_interactive(); 2399 #if MSDOS_COMPILER 2400 clear_eol(); 2401 #else 2402 if (below_mem) 2403 ltputs(sc_eos_clear, 1, putchr); 2404 else 2405 ltputs(sc_eol_clear, 1, putchr); 2406 #endif 2407 } 2408 2409 /* 2410 * Clear the bottom line of the display. 2411 * Leave the cursor at the beginning of the bottom line. 2412 */ 2413 public void clear_bot(void) 2414 { 2415 /* 2416 * If we're in a non-normal attribute mode, temporarily exit 2417 * the mode while we do the clear. Some terminals fill the 2418 * cleared area with the current attribute. 2419 */ 2420 if (oldbot) 2421 lower_left(); 2422 else 2423 line_left(); 2424 2425 if (attrmode == AT_NORMAL) 2426 clear_eol_bot(); 2427 else 2428 { 2429 int saved_attrmode = attrmode; 2430 2431 at_exit(); 2432 clear_eol_bot(); 2433 at_enter(saved_attrmode); 2434 } 2435 } 2436 2437 /* 2438 * Color string may be "x[y]" where x and y are 4-bit color chars, 2439 * or "N[.M]" where N and M are decimal integers> 2440 * Any of x,y,N,M may also be "-" to mean "unchanged". 2441 */ 2442 2443 /* 2444 * Parse a 4-bit color char. 2445 */ 2446 static int parse_color4(char ch) 2447 { 2448 switch (ch) 2449 { 2450 case 'k': return 0; 2451 case 'r': return CV_RED; 2452 case 'g': return CV_GREEN; 2453 case 'y': return CV_RED|CV_GREEN; 2454 case 'b': return CV_BLUE; 2455 case 'm': return CV_RED|CV_BLUE; 2456 case 'c': return CV_GREEN|CV_BLUE; 2457 case 'w': return CV_RED|CV_GREEN|CV_BLUE; 2458 case 'K': return 0|CV_BRIGHT; 2459 case 'R': return CV_RED|CV_BRIGHT; 2460 case 'G': return CV_GREEN|CV_BRIGHT; 2461 case 'Y': return CV_RED|CV_GREEN|CV_BRIGHT; 2462 case 'B': return CV_BLUE|CV_BRIGHT; 2463 case 'M': return CV_RED|CV_BLUE|CV_BRIGHT; 2464 case 'C': return CV_GREEN|CV_BLUE|CV_BRIGHT; 2465 case 'W': return CV_RED|CV_GREEN|CV_BLUE|CV_BRIGHT; 2466 case '-': return CV_NOCHANGE; 2467 default: return CV_ERROR; 2468 } 2469 } 2470 2471 /* 2472 * Parse a color as a decimal integer. 2473 */ 2474 static int parse_color6(char **ps) 2475 { 2476 if (**ps == '-') 2477 { 2478 (*ps)++; 2479 return CV_NOCHANGE; 2480 } else 2481 { 2482 char *ops = *ps; 2483 int color = lstrtoi(ops, ps, 10); 2484 if (color < 0 || *ps == ops) 2485 return CV_ERROR; 2486 return color; 2487 } 2488 } 2489 2490 /* 2491 * Parse a color pair and return the foreground/background values. 2492 * Return type of color specifier: 2493 * CV_4BIT: fg/bg values are OR of CV_{RGB} bits. 2494 * CV_6BIT: fg/bg values are integers entered by user. 2495 */ 2496 public COLOR_TYPE parse_color(char *str, int *p_fg, int *p_bg) 2497 { 2498 int fg; 2499 int bg; 2500 COLOR_TYPE type = CT_NULL; 2501 2502 if (str == NULL || *str == '\0') 2503 return CT_NULL; 2504 if (*str == '+') 2505 str++; /* ignore leading + */ 2506 2507 fg = parse_color4(str[0]); 2508 bg = parse_color4((strlen(str) < 2) ? '-' : str[1]); 2509 if (fg != CV_ERROR && bg != CV_ERROR) 2510 type = CT_4BIT; 2511 else 2512 { 2513 fg = parse_color6(&str); 2514 bg = (fg != CV_ERROR && *str++ == '.') ? parse_color6(&str) : CV_NOCHANGE; 2515 if (fg != CV_ERROR && bg != CV_ERROR) 2516 type = CT_6BIT; 2517 } 2518 if (p_fg != NULL) *p_fg = fg; 2519 if (p_bg != NULL) *p_bg = bg; 2520 return type; 2521 } 2522 2523 #if !MSDOS_COMPILER 2524 2525 static int sgr_color(int color) 2526 { 2527 switch (color) 2528 { 2529 case 0: return 30; 2530 case CV_RED: return 31; 2531 case CV_GREEN: return 32; 2532 case CV_RED|CV_GREEN: return 33; 2533 case CV_BLUE: return 34; 2534 case CV_RED|CV_BLUE: return 35; 2535 case CV_GREEN|CV_BLUE: return 36; 2536 case CV_RED|CV_GREEN|CV_BLUE: return 37; 2537 2538 case CV_BRIGHT: return 90; 2539 case CV_RED|CV_BRIGHT: return 91; 2540 case CV_GREEN|CV_BRIGHT: return 92; 2541 case CV_RED|CV_GREEN|CV_BRIGHT: return 93; 2542 case CV_BLUE|CV_BRIGHT: return 94; 2543 case CV_RED|CV_BLUE|CV_BRIGHT: return 95; 2544 case CV_GREEN|CV_BLUE|CV_BRIGHT: return 96; 2545 case CV_RED|CV_GREEN|CV_BLUE|CV_BRIGHT: return 97; 2546 2547 default: return color; 2548 } 2549 } 2550 2551 static void tput_fmt(char *fmt, int color, int (*f_putc)(int)) 2552 { 2553 char buf[INT_STRLEN_BOUND(int)+16]; 2554 if (color == attrcolor) 2555 return; 2556 SNPRINTF1(buf, sizeof(buf), fmt, color); 2557 ltputs(buf, 1, f_putc); 2558 attrcolor = color; 2559 } 2560 2561 static void tput_color(char *str, int (*f_putc)(int)) 2562 { 2563 int fg; 2564 int bg; 2565 2566 if (str != NULL && strcmp(str, "*") == 0) 2567 { 2568 /* Special case: reset to normal */ 2569 tput_fmt(ESCS"[m", -1, f_putc); 2570 return; 2571 } 2572 switch (parse_color(str, &fg, &bg)) 2573 { 2574 case CT_4BIT: 2575 if (fg >= 0) 2576 tput_fmt(ESCS"[%dm", sgr_color(fg), f_putc); 2577 if (bg >= 0) 2578 tput_fmt(ESCS"[%dm", sgr_color(bg)+10, f_putc); 2579 break; 2580 case CT_6BIT: 2581 if (fg >= 0) 2582 tput_fmt(ESCS"[38;5;%dm", fg, f_putc); 2583 if (bg >= 0) 2584 tput_fmt(ESCS"[48;5;%dm", bg, f_putc); 2585 break; 2586 default: 2587 break; 2588 } 2589 } 2590 2591 static void tput_inmode(char *mode_str, int attr, int attr_bit, int (*f_putc)(int)) 2592 { 2593 char *color_str; 2594 if ((attr & attr_bit) == 0) 2595 return; 2596 color_str = get_color_map(attr_bit); 2597 if (color_str == NULL || *color_str == '\0' || *color_str == '+') 2598 { 2599 ltputs(mode_str, 1, f_putc); 2600 if (color_str == NULL || *color_str++ != '+') 2601 return; 2602 } 2603 /* Color overrides mode string */ 2604 tput_color(color_str, f_putc); 2605 } 2606 2607 static void tput_outmode(char *mode_str, int attr_bit, int (*f_putc)(int)) 2608 { 2609 if ((attrmode & attr_bit) == 0) 2610 return; 2611 ltputs(mode_str, 1, f_putc); 2612 } 2613 2614 #else /* MSDOS_COMPILER */ 2615 2616 #if MSDOS_COMPILER==WIN32C 2617 static int WIN32put_fmt(char *fmt, int color) 2618 { 2619 char buf[INT_STRLEN_BOUND(int)+16]; 2620 int len = SNPRINTF1(buf, sizeof(buf), fmt, color); 2621 WIN32textout(buf, len); 2622 return TRUE; 2623 } 2624 #endif 2625 2626 static int win_set_color(int attr) 2627 { 2628 int fg; 2629 int bg; 2630 int out = FALSE; 2631 char *str = get_color_map(attr); 2632 if (str == NULL || str[0] == '\0') 2633 return FALSE; 2634 switch (parse_color(str, &fg, &bg)) 2635 { 2636 case CT_4BIT: 2637 if (fg >= 0 && bg >= 0) 2638 { 2639 SETCOLORS(fg, bg); 2640 out = TRUE; 2641 } else if (fg >= 0) 2642 { 2643 SET_FG_COLOR(fg); 2644 out = TRUE; 2645 } else if (bg >= 0) 2646 { 2647 SET_BG_COLOR(bg); 2648 out = TRUE; 2649 } 2650 break; 2651 #if MSDOS_COMPILER==WIN32C 2652 case CT_6BIT: 2653 if (vt_enabled) 2654 { 2655 if (fg > 0) 2656 out = WIN32put_fmt(ESCS"[38;5;%dm", fg); 2657 if (bg > 0) 2658 out = WIN32put_fmt(ESCS"[48;5;%dm", bg); 2659 } 2660 break; 2661 #endif 2662 default: 2663 break; 2664 } 2665 return out; 2666 } 2667 2668 #endif /* MSDOS_COMPILER */ 2669 2670 public void at_enter(int attr) 2671 { 2672 attr = apply_at_specials(attr); 2673 #if !MSDOS_COMPILER 2674 /* The one with the most priority is last. */ 2675 tput_inmode(sc_u_in, attr, AT_UNDERLINE, putchr); 2676 tput_inmode(sc_b_in, attr, AT_BOLD, putchr); 2677 tput_inmode(sc_bl_in, attr, AT_BLINK, putchr); 2678 /* Don't use standout and color at the same time. */ 2679 if (use_color && (attr & AT_COLOR)) 2680 tput_color(get_color_map(attr), putchr); 2681 else 2682 tput_inmode(sc_s_in, attr, AT_STANDOUT, putchr); 2683 #else 2684 flush(); 2685 /* The one with the most priority is first. */ 2686 if ((attr & AT_COLOR) && use_color) 2687 { 2688 win_set_color(attr); 2689 } else if (attr & AT_STANDOUT) 2690 { 2691 SETCOLORS(so_fg_color, so_bg_color); 2692 } else if (attr & AT_BLINK) 2693 { 2694 SETCOLORS(bl_fg_color, bl_bg_color); 2695 } else if (attr & AT_BOLD) 2696 { 2697 SETCOLORS(bo_fg_color, bo_bg_color); 2698 } else if (attr & AT_UNDERLINE) 2699 { 2700 SETCOLORS(ul_fg_color, ul_bg_color); 2701 } 2702 #endif 2703 attrmode = attr; 2704 } 2705 2706 public void at_exit(void) 2707 { 2708 #if !MSDOS_COMPILER 2709 /* Undo things in the reverse order we did them. */ 2710 tput_color("*", putchr); 2711 tput_outmode(sc_s_out, AT_STANDOUT, putchr); 2712 tput_outmode(sc_bl_out, AT_BLINK, putchr); 2713 tput_outmode(sc_b_out, AT_BOLD, putchr); 2714 tput_outmode(sc_u_out, AT_UNDERLINE, putchr); 2715 #else 2716 flush(); 2717 SETCOLORS(nm_fg_color, nm_bg_color); 2718 #endif 2719 attrmode = AT_NORMAL; 2720 } 2721 2722 public void at_switch(int attr) 2723 { 2724 int new_attrmode = apply_at_specials(attr); 2725 int ignore_modes = AT_ANSI; 2726 2727 if ((new_attrmode & ~ignore_modes) != (attrmode & ~ignore_modes)) 2728 { 2729 at_exit(); 2730 at_enter(attr); 2731 } 2732 } 2733 2734 public int is_at_equiv(int attr1, int attr2) 2735 { 2736 attr1 = apply_at_specials(attr1); 2737 attr2 = apply_at_specials(attr2); 2738 2739 return (attr1 == attr2); 2740 } 2741 2742 public int apply_at_specials(int attr) 2743 { 2744 if (attr & AT_BINARY) 2745 attr |= binattr; 2746 if (attr & AT_HILITE) 2747 attr |= AT_STANDOUT; 2748 attr &= ~(AT_BINARY|AT_HILITE); 2749 2750 return attr; 2751 } 2752 2753 /* 2754 * Output a plain backspace, without erasing the previous char. 2755 */ 2756 public void putbs(void) 2757 { 2758 if (termcap_debug) 2759 putstr("<bs>"); 2760 else 2761 { 2762 #if !MSDOS_COMPILER 2763 ltputs(sc_backspace, 1, putchr); 2764 #else 2765 int row, col; 2766 2767 flush(); 2768 { 2769 #if MSDOS_COMPILER==MSOFTC 2770 struct rccoord tpos; 2771 tpos = _gettextposition(); 2772 row = tpos.row; 2773 col = tpos.col; 2774 #else 2775 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 2776 row = wherey(); 2777 col = wherex(); 2778 #else 2779 #if MSDOS_COMPILER==WIN32C 2780 CONSOLE_SCREEN_BUFFER_INFO scr; 2781 GetConsoleScreenBufferInfo(con_out, &scr); 2782 row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1; 2783 col = scr.dwCursorPosition.X - scr.srWindow.Left + 1; 2784 #endif 2785 #endif 2786 #endif 2787 } 2788 if (col <= 1) 2789 return; 2790 _settextposition(row, col-1); 2791 #endif /* MSDOS_COMPILER */ 2792 } 2793 } 2794 2795 #if MSDOS_COMPILER==WIN32C 2796 /* 2797 * Determine whether an input character is waiting to be read. 2798 */ 2799 public int win32_kbhit(void) 2800 { 2801 INPUT_RECORD ip; 2802 DWORD read; 2803 2804 if (keyCount > 0 || win_unget_pending) 2805 return (TRUE); 2806 2807 currentKey.ascii = 0; 2808 currentKey.scan = 0; 2809 2810 if (x11mouseCount > 0) 2811 { 2812 currentKey.ascii = x11mousebuf[x11mousePos++]; 2813 --x11mouseCount; 2814 keyCount = 1; 2815 return (TRUE); 2816 } 2817 2818 /* 2819 * Wait for a real key-down event, but 2820 * ignore SHIFT and CONTROL key events. 2821 */ 2822 do 2823 { 2824 PeekConsoleInputW(tty, &ip, 1, &read); 2825 if (read == 0) 2826 return (FALSE); 2827 ReadConsoleInputW(tty, &ip, 1, &read); 2828 /* generate an X11 mouse sequence from the mouse event */ 2829 if (mousecap && ip.EventType == MOUSE_EVENT && 2830 ip.Event.MouseEvent.dwEventFlags != MOUSE_MOVED) 2831 { 2832 x11mousebuf[3] = X11MOUSE_OFFSET + ip.Event.MouseEvent.dwMousePosition.X + 1; 2833 x11mousebuf[4] = X11MOUSE_OFFSET + ip.Event.MouseEvent.dwMousePosition.Y + 1; 2834 switch (ip.Event.MouseEvent.dwEventFlags) 2835 { 2836 case 0: /* press or release */ 2837 if (ip.Event.MouseEvent.dwButtonState == 0) 2838 x11mousebuf[2] = X11MOUSE_OFFSET + X11MOUSE_BUTTON_REL; 2839 else if (ip.Event.MouseEvent.dwButtonState & (FROM_LEFT_3RD_BUTTON_PRESSED | FROM_LEFT_4TH_BUTTON_PRESSED)) 2840 continue; 2841 else 2842 x11mousebuf[2] = X11MOUSE_OFFSET + X11MOUSE_BUTTON1 + ((int)ip.Event.MouseEvent.dwButtonState << 1); 2843 break; 2844 case MOUSE_WHEELED: 2845 x11mousebuf[2] = X11MOUSE_OFFSET + (((int)ip.Event.MouseEvent.dwButtonState < 0) ? X11MOUSE_WHEEL_DOWN : X11MOUSE_WHEEL_UP); 2846 break; 2847 default: 2848 continue; 2849 } 2850 x11mousePos = 0; 2851 x11mouseCount = 5; 2852 currentKey.ascii = ESC; 2853 keyCount = 1; 2854 return (TRUE); 2855 } 2856 } while (ip.EventType != KEY_EVENT || 2857 ip.Event.KeyEvent.bKeyDown != TRUE || 2858 (ip.Event.KeyEvent.wVirtualScanCode == 0 && ip.Event.KeyEvent.uChar.UnicodeChar == 0) || 2859 ((ip.Event.KeyEvent.dwControlKeyState & (RIGHT_ALT_PRESSED|LEFT_CTRL_PRESSED)) == (RIGHT_ALT_PRESSED|LEFT_CTRL_PRESSED) && ip.Event.KeyEvent.uChar.UnicodeChar == 0) || 2860 ip.Event.KeyEvent.wVirtualKeyCode == VK_KANJI || 2861 ip.Event.KeyEvent.wVirtualKeyCode == VK_SHIFT || 2862 ip.Event.KeyEvent.wVirtualKeyCode == VK_CONTROL || 2863 ip.Event.KeyEvent.wVirtualKeyCode == VK_MENU); 2864 2865 currentKey.unicode = ip.Event.KeyEvent.uChar.UnicodeChar; 2866 currentKey.ascii = ip.Event.KeyEvent.uChar.AsciiChar; 2867 currentKey.scan = ip.Event.KeyEvent.wVirtualScanCode; 2868 keyCount = ip.Event.KeyEvent.wRepeatCount; 2869 2870 if (ip.Event.KeyEvent.dwControlKeyState & 2871 (LEFT_ALT_PRESSED | RIGHT_ALT_PRESSED)) 2872 { 2873 switch (currentKey.scan) 2874 { 2875 case PCK_ALT_E: /* letter 'E' */ 2876 currentKey.ascii = 0; 2877 break; 2878 } 2879 } else if (ip.Event.KeyEvent.dwControlKeyState & 2880 (LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED)) 2881 { 2882 switch (currentKey.scan) 2883 { 2884 case PCK_RIGHT: /* right arrow */ 2885 currentKey.scan = PCK_CTL_RIGHT; 2886 break; 2887 case PCK_LEFT: /* left arrow */ 2888 currentKey.scan = PCK_CTL_LEFT; 2889 break; 2890 case PCK_DELETE: /* delete */ 2891 currentKey.scan = PCK_CTL_DELETE; 2892 break; 2893 } 2894 } else if (ip.Event.KeyEvent.dwControlKeyState & SHIFT_PRESSED) 2895 { 2896 switch (currentKey.scan) 2897 { 2898 case PCK_SHIFT_TAB: /* tab */ 2899 currentKey.ascii = 0; 2900 break; 2901 } 2902 } 2903 2904 return (TRUE); 2905 } 2906 2907 /* 2908 * Read a character from the keyboard. 2909 * 2910 * Known issues: 2911 * - WIN32getch API should be int like libc (with unsigned char values or -1). 2912 * - The unicode code below can return 0 - incorrectly indicating scan code. 2913 * - UTF16-LE surrogate pairs don't work (and return 0). 2914 * - If win32_kbhit returns true then WIN32getch should never block, but it 2915 * will block till the next keypress if it's numlock/capslock scan code. 2916 */ 2917 public char WIN32getch(void) 2918 { 2919 char ascii; 2920 static unsigned char utf8[UTF8_MAX_LENGTH]; 2921 static int utf8_size = 0; 2922 static int utf8_next_byte = 0; 2923 2924 if (win_unget_pending) 2925 { 2926 win_unget_pending = FALSE; 2927 return (char) win_unget_data; 2928 } 2929 2930 // Return the rest of multibyte character from the prior call 2931 if (utf8_next_byte < utf8_size) 2932 { 2933 ascii = utf8[utf8_next_byte++]; 2934 return ascii; 2935 } 2936 utf8_size = 0; 2937 2938 if (pending_scancode) 2939 { 2940 pending_scancode = 0; 2941 return ((char)(currentKey.scan & 0x00FF)); 2942 } 2943 2944 do { 2945 while (!win32_kbhit()) 2946 { 2947 Sleep(20); 2948 if (ABORT_SIGS()) 2949 return ('\003'); 2950 } 2951 keyCount--; 2952 // If multibyte character, return its first byte 2953 if (currentKey.unicode > 0x7f) 2954 { 2955 utf8_size = WideCharToMultiByte(CP_UTF8, 0, ¤tKey.unicode, 1, (LPSTR) &utf8, sizeof(utf8), NULL, NULL); 2956 if (utf8_size == 0) 2957 return '\0'; 2958 ascii = utf8[0]; 2959 utf8_next_byte = 1; 2960 } else 2961 ascii = currentKey.ascii; 2962 /* 2963 * On PC's, the extended keys return a 2 byte sequence beginning 2964 * with '00', so if the ascii code is 00, the next byte will be 2965 * the lsb of the scan code. 2966 */ 2967 pending_scancode = (ascii == 0x00); 2968 } while (pending_scancode && 2969 (currentKey.scan == PCK_CAPS_LOCK || currentKey.scan == PCK_NUM_LOCK)); 2970 2971 return ascii; 2972 } 2973 2974 /* 2975 * Make the next call to WIN32getch return ch without changing the queue state. 2976 */ 2977 public void WIN32ungetch(int ch) 2978 { 2979 win_unget_pending = TRUE; 2980 win_unget_data = ch; 2981 } 2982 #endif 2983 2984 #if MSDOS_COMPILER 2985 /* 2986 */ 2987 public void WIN32setcolors(int fg, int bg) 2988 { 2989 SETCOLORS(fg, bg); 2990 } 2991 2992 /* 2993 */ 2994 public void WIN32textout(char *text, int len) 2995 { 2996 #if MSDOS_COMPILER==WIN32C 2997 DWORD written; 2998 if (utf_mode == 2) 2999 { 3000 /* 3001 * We've got UTF-8 text in a non-UTF-8 console. Convert it to 3002 * wide and use WriteConsoleW. 3003 */ 3004 WCHAR wtext[1024]; 3005 len = MultiByteToWideChar(CP_UTF8, 0, text, len, wtext, 3006 sizeof(wtext)/sizeof(*wtext)); 3007 WriteConsoleW(con_out, wtext, len, &written, NULL); 3008 } else 3009 WriteConsole(con_out, text, len, &written, NULL); 3010 #else 3011 char c = text[len]; 3012 text[len] = '\0'; 3013 cputs(text); 3014 text[len] = c; 3015 #endif 3016 } 3017 #endif 3018 3019