1 /* 2 * Copyright (C) 1984-2025 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_TERMINFO && !USE_TERMCAP 72 #define USE_TERMINFO 1 73 #endif 74 75 #if USE_TERMINFO 76 #include <curses.h> 77 #include <term.h> 78 #else 79 #if HAVE_NCURSESW_TERMCAP_H 80 #include <ncursesw/termcap.h> 81 #else 82 #if HAVE_NCURSES_TERMCAP_H 83 #include <ncurses/termcap.h> 84 #else 85 #if HAVE_TERMCAP_H 86 #include <termcap.h> 87 #endif 88 #endif 89 #endif 90 #endif 91 #ifdef _OSK 92 #include <signal.h> 93 #endif 94 #if OS2 95 #include <sys/signal.h> 96 #include "pckeys.h" 97 #endif 98 #if HAVE_SYS_STREAM_H 99 #include <sys/stream.h> 100 #endif 101 #if HAVE_SYS_PTEM_H 102 #include <sys/ptem.h> 103 #endif 104 105 #endif /* MSDOS_COMPILER */ 106 107 /* 108 * Check for broken termios package that forces you to manually 109 * set the line discipline. 110 */ 111 #ifdef __ultrix__ 112 #define MUST_SET_LINE_DISCIPLINE 1 113 #else 114 #define MUST_SET_LINE_DISCIPLINE 0 115 #endif 116 117 #if OS2 118 #define DEFAULT_TERM "ansi" 119 static char *windowid; 120 #else 121 #define DEFAULT_TERM "unknown" 122 #endif 123 124 #if MSDOS_COMPILER==MSOFTC 125 static int videopages; 126 static long msec_loops; 127 static int flash_created = 0; 128 #define SET_FG_COLOR(fg) _settextcolor(fg) 129 #define SET_BG_COLOR(bg) _setbkcolor(bg) 130 #define SETCOLORS(fg,bg) { SET_FG_COLOR(fg); SET_BG_COLOR(bg); } 131 #endif 132 133 #if MSDOS_COMPILER==BORLANDC 134 static unsigned short *whitescreen; 135 static int flash_created = 0; 136 #endif 137 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 138 #define _settextposition(y,x) gotoxy(x,y) 139 #define _clearscreen(m) clrscr() 140 #define _outtext(s) cputs(s) 141 #define SET_FG_COLOR(fg) textcolor(fg) 142 #define SET_BG_COLOR(bg) textbackground(bg) 143 #define SETCOLORS(fg,bg) { SET_FG_COLOR(fg); SET_BG_COLOR(bg); } 144 extern int sc_height; 145 #endif 146 147 #if MSDOS_COMPILER==WIN32C 148 #define UTF8_MAX_LENGTH 4 149 150 static WORD curr_attr; 151 152 static HANDLE con_out_save = INVALID_HANDLE_VALUE; /* previous console */ 153 static HANDLE con_out_ours = INVALID_HANDLE_VALUE; /* our own */ 154 HANDLE con_out = INVALID_HANDLE_VALUE; /* current console */ 155 156 extern int utf_mode; 157 extern lbool quitting; 158 static void win32_init_term(); 159 static void win32_deinit_term(); 160 161 #ifndef ENABLE_VIRTUAL_TERMINAL_PROCESSING 162 #define ENABLE_VIRTUAL_TERMINAL_PROCESSING 4 163 #endif 164 165 #define FG_COLORS (FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_INTENSITY) 166 #define BG_COLORS (BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE | BACKGROUND_INTENSITY) 167 #define MAKEATTR(fg,bg) ((WORD)((fg)|((bg)<<4))) 168 #define APPLY_COLORS() { if (SetConsoleTextAttribute(con_out, curr_attr) == 0) \ 169 error("SETCOLORS failed", NULL_PARG); } 170 #define SET_FG_COLOR(fg) { curr_attr &= ~0x0f; curr_attr |= (fg); APPLY_COLORS(); } 171 #define SET_BG_COLOR(bg) { curr_attr &= ~0xf0; curr_attr |= ((bg)<<4); APPLY_COLORS(); } 172 #define SETCOLORS(fg,bg) { curr_attr = MAKEATTR(fg,bg); APPLY_COLORS(); } 173 #endif 174 175 #if MSDOS_COMPILER 176 public int nm_fg_color = CV_ERROR; /* Color of normal text */ 177 public int nm_bg_color = CV_ERROR; 178 public int nm_attr = 0; 179 public int bo_fg_color = CV_ERROR; /* Color of bold text */ 180 public int bo_bg_color = CV_ERROR; 181 public int bo_attr = 0; 182 public int ul_fg_color = CV_ERROR; /* Color of underlined text */ 183 public int ul_bg_color = CV_ERROR; 184 public int ul_attr = 0; 185 public int so_fg_color = CV_ERROR; /* Color of standout text */ 186 public int so_bg_color = CV_ERROR; 187 public int so_attr = 0; 188 public int bl_fg_color = CV_ERROR; /* Color of blinking text */ 189 public int bl_bg_color = CV_ERROR; 190 public int bl_attr = 0; 191 static int sy_fg_color; /* Color of system text (before less) */ 192 static int sy_bg_color; 193 public int sgr_mode; /* Honor ANSI sequences rather than using above */ 194 #if MSDOS_COMPILER==WIN32C 195 static DWORD init_console_output_mode; 196 extern DWORD init_console_input_mode; 197 extern DWORD curr_console_input_mode; 198 extern DWORD base_console_input_mode; 199 extern DWORD mouse_console_input_mode; 200 public int vt_enabled = -1; /* Is virtual terminal processing available? */ 201 #endif 202 #else 203 204 /* 205 * These two variables are sometimes defined in, 206 * and needed by, the termcap library. 207 */ 208 #if USE_TERMINFO 209 #undef HAVE_OSPEED 210 #else 211 #if MUST_DEFINE_OSPEED 212 extern short ospeed; /* Terminal output baud rate */ 213 extern char PC; /* Pad character */ 214 #endif 215 #ifdef _OSK 216 short ospeed; 217 char PC_, *UP, *BC; 218 #endif 219 #endif 220 221 /* 222 * Strings passed to tputs() to do various terminal functions. 223 */ 224 static constant char 225 #if HAVE_OSPEED 226 *sc_pad, /* Pad string */ 227 #endif 228 *sc_home, /* Cursor home */ 229 *sc_addline, /* Add line, scroll down following lines */ 230 *sc_lower_left, /* Cursor to last line, first column */ 231 *sc_return, /* Cursor to beginning of current line */ 232 *sc_move, /* General cursor positioning */ 233 *sc_clear, /* Clear screen */ 234 *sc_eol_clear, /* Clear to end of line */ 235 *sc_eos_clear, /* Clear to end of screen */ 236 *sc_s_in, /* Enter standout (highlighted) mode */ 237 *sc_s_out, /* Exit standout mode */ 238 *sc_u_in, /* Enter underline mode */ 239 *sc_u_out, /* Exit underline mode */ 240 *sc_b_in, /* Enter bold mode */ 241 *sc_b_out, /* Exit bold mode */ 242 *sc_bl_in, /* Enter blink mode */ 243 *sc_bl_out, /* Exit blink mode */ 244 *sc_visual_bell, /* Visual bell (flash screen) sequence */ 245 *sc_backspace, /* Backspace cursor */ 246 *sc_s_keypad, /* Start keypad mode */ 247 *sc_e_keypad, /* End keypad mode */ 248 *sc_s_mousecap, /* Start mouse capture mode */ 249 *sc_e_mousecap, /* End mouse capture mode */ 250 *sc_s_bracketed_paste, /* Start bracketed paste mode */ 251 *sc_e_bracketed_paste, /* End bracketed paste mode */ 252 *sc_suspend, /* Suspend screen updates */ 253 *sc_resume, /* Resume screen updates */ 254 *sc_init, /* Startup terminal initialization */ 255 *sc_deinit; /* Exit terminal de-initialization */ 256 257 static int attrcolor = -1; 258 #endif 259 260 /* term_init has been called; terminal is ready for use by less */ 261 static lbool term_init_done = FALSE; 262 public lbool term_init_ever = FALSE; 263 264 public int auto_wrap; /* Terminal does \r\n when write past margin */ 265 public int defer_wrap; /* After printing char in last column, doesn't wrap until next char */ 266 public int erase_char; /* The user's erase char */ 267 public int erase2_char; /* The user's other erase char */ 268 public int kill_char; /* The user's line-kill char */ 269 public int werase_char; /* The user's word-erase char */ 270 public int sc_width, sc_height; /* Height & width of screen */ 271 public int bo_s_width, bo_e_width; /* Printing width of boldface seq */ 272 public int ul_s_width, ul_e_width; /* Printing width of underline seq */ 273 public int so_s_width, so_e_width; /* Printing width of standout seq */ 274 public int bl_s_width, bl_e_width; /* Printing width of blink seq */ 275 public int above_mem, below_mem; /* Memory retained above/below screen */ 276 public int can_goto_line; /* Can move cursor to any line */ 277 public int clear_bg; /* Clear fills with background color */ 278 public lbool missing_cap = FALSE; /* Some capability is missing */ 279 public constant char *kent = NULL; /* Keypad ENTER sequence */ 280 public lbool term_addrs = FALSE; /* "ti" has been sent to terminal */ 281 public lbool full_screen = TRUE; /* We're using all lines of terminal */ 282 283 static int attrmode = AT_NORMAL; 284 static int termcap_debug = -1; 285 static int no_alt_screen; /* sc_init does not switch to alt screen */ 286 extern int binattr; 287 extern int one_screen; 288 extern int shell_lines; 289 290 #if !MSDOS_COMPILER 291 static constant char *cheaper(constant char *t1, constant char *t2, constant char *def); 292 static void tmodes(constant char *inti, constant char *outti, constant char *intc, constant char *outtc, constant char **instr, 293 constant char **outstr, constant char *def_instr, constant char *def_outstr, char **spp); 294 #endif 295 296 extern int quiet; /* If VERY_QUIET, use visual bell for bell */ 297 extern int no_vbell; 298 extern int no_back_scroll; 299 extern int no_init; 300 extern int no_keypad; 301 extern int sigs; 302 extern int top_scroll; 303 extern int quit_if_one_screen; 304 extern int oldbot; 305 extern int mousecap; 306 extern int is_tty; 307 extern int use_color; 308 extern int no_paste; 309 extern int wscroll; 310 #if HILITE_SEARCH 311 extern int hilite_search; 312 #endif 313 #if MSDOS_COMPILER==WIN32C 314 extern HANDLE tty; 315 #else 316 extern int tty; 317 #endif 318 319 #if (HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS) || defined(TCGETA) 320 /* 321 * Set termio flags for use by less. 322 */ 323 static void set_termio_flags( 324 #if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS 325 struct termios *s 326 #else 327 struct termio *s 328 #endif 329 ) 330 { 331 s->c_lflag &= ~(0 332 #ifdef ICANON 333 | ICANON 334 #endif 335 #ifdef ECHO 336 | ECHO 337 #endif 338 #ifdef ECHOE 339 | ECHOE 340 #endif 341 #ifdef ECHOK 342 | ECHOK 343 #endif 344 #ifdef ECHONL 345 | ECHONL 346 #endif 347 ); 348 349 s->c_oflag |= (0 350 #ifdef OPOST 351 | OPOST 352 #endif 353 #ifdef ONLCR 354 | ONLCR 355 #endif 356 ); 357 358 s->c_oflag &= ~(0 359 #ifdef ONOEOT 360 | ONOEOT 361 #endif 362 #ifdef OCRNL 363 | OCRNL 364 #endif 365 #ifdef ONOCR 366 | ONOCR 367 #endif 368 #ifdef ONLRET 369 | ONLRET 370 #endif 371 ); 372 } 373 #endif 374 375 /* 376 * Change terminal to "raw mode", or restore to "normal" mode. 377 * "Raw mode" means 378 * 1. An outstanding read will complete on receipt of a single keystroke. 379 * 2. Input is not echoed. 380 * 3. On output, \n is mapped to \r\n. 381 * 4. \t is NOT expanded into spaces. 382 * 5. Signal-causing characters such as ctrl-C (interrupt), 383 * etc. are NOT disabled. 384 * It doesn't matter whether an input \n is mapped to \r, or vice versa. 385 */ 386 public void raw_mode(int on) 387 { 388 static int curr_on = 0; 389 390 if (on == curr_on) 391 return; 392 erase2_char = '\b'; /* in case OS doesn't know about erase2 */ 393 #if LESSTEST 394 if (is_lesstest()) 395 { 396 /* {{ For consistent conditions when running tests. }} */ 397 erase_char = '\b'; 398 kill_char = CONTROL('U'); 399 werase_char = CONTROL('W'); 400 } else 401 #endif /*LESSTEST*/ 402 #if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS 403 { 404 struct termios s; 405 static struct termios save_term; 406 static int saved_term = 0; 407 408 if (on) 409 { 410 /* 411 * Get terminal modes. 412 */ 413 if (tcgetattr(tty, &s) < 0) 414 { 415 erase_char = '\b'; 416 kill_char = CONTROL('U'); 417 werase_char = CONTROL('W'); 418 } else 419 { 420 /* 421 * Save modes and set certain variables dependent on modes. 422 */ 423 if (!saved_term) 424 { 425 save_term = s; 426 saved_term = 1; 427 } 428 #if HAVE_OSPEED 429 switch (cfgetospeed(&s)) 430 { 431 #ifdef B0 432 case B0: ospeed = 0; break; 433 #endif 434 #ifdef B50 435 case B50: ospeed = 1; break; 436 #endif 437 #ifdef B75 438 case B75: ospeed = 2; break; 439 #endif 440 #ifdef B110 441 case B110: ospeed = 3; break; 442 #endif 443 #ifdef B134 444 case B134: ospeed = 4; break; 445 #endif 446 #ifdef B150 447 case B150: ospeed = 5; break; 448 #endif 449 #ifdef B200 450 case B200: ospeed = 6; break; 451 #endif 452 #ifdef B300 453 case B300: ospeed = 7; break; 454 #endif 455 #ifdef B600 456 case B600: ospeed = 8; break; 457 #endif 458 #ifdef B1200 459 case B1200: ospeed = 9; break; 460 #endif 461 #ifdef B1800 462 case B1800: ospeed = 10; break; 463 #endif 464 #ifdef B2400 465 case B2400: ospeed = 11; break; 466 #endif 467 #ifdef B4800 468 case B4800: ospeed = 12; break; 469 #endif 470 #ifdef B9600 471 case B9600: ospeed = 13; break; 472 #endif 473 #ifdef EXTA 474 case EXTA: ospeed = 14; break; 475 #endif 476 #ifdef EXTB 477 case EXTB: ospeed = 15; break; 478 #endif 479 #ifdef B57600 480 case B57600: ospeed = 16; break; 481 #endif 482 #ifdef B115200 483 case B115200: ospeed = 17; break; 484 #endif 485 default: ; 486 } 487 #endif 488 erase_char = s.c_cc[VERASE]; 489 #ifdef VERASE2 490 erase2_char = s.c_cc[VERASE2]; 491 #endif 492 kill_char = s.c_cc[VKILL]; 493 #ifdef VWERASE 494 werase_char = s.c_cc[VWERASE]; 495 #else 496 werase_char = CONTROL('W'); 497 #endif 498 499 /* 500 * Set the modes to the way we want them. 501 */ 502 set_termio_flags(&s); 503 s.c_cc[VMIN] = 1; 504 s.c_cc[VTIME] = 0; 505 #ifdef VLNEXT 506 s.c_cc[VLNEXT] = 0; 507 #endif 508 #ifdef VDSUSP 509 s.c_cc[VDSUSP] = 0; 510 #endif 511 #ifdef VSTOP 512 s.c_cc[VSTOP] = 0; 513 #endif 514 #ifdef VSTART 515 s.c_cc[VSTART] = 0; 516 #endif 517 #ifdef VDISCARD 518 s.c_cc[VDISCARD] = 0; 519 #endif 520 #if MUST_SET_LINE_DISCIPLINE 521 /* 522 * System's termios is broken; need to explicitly 523 * request TERMIODISC line discipline. 524 */ 525 s.c_line = TERMIODISC; 526 #endif 527 } 528 } else 529 { 530 /* 531 * Restore saved modes. 532 */ 533 s = save_term; 534 } 535 #if HAVE_FSYNC 536 fsync(tty); 537 #endif 538 tcsetattr(tty, TCSADRAIN, &s); 539 #if MUST_SET_LINE_DISCIPLINE 540 if (!on) 541 { 542 /* 543 * Broken termios *ignores* any line discipline 544 * except TERMIODISC. A different old line discipline 545 * is therefore not restored, yet. Restore the old 546 * line discipline by hand. 547 */ 548 ioctl(tty, TIOCSETD, &save_term.c_line); 549 } 550 #endif 551 } 552 #else 553 #ifdef TCGETA 554 { 555 struct termio s; 556 static struct termio save_term; 557 static int saved_term = 0; 558 559 if (on) 560 { 561 /* 562 * Get terminal modes. 563 */ 564 ioctl(tty, TCGETA, &s); 565 566 /* 567 * Save modes and set certain variables dependent on modes. 568 */ 569 if (!saved_term) 570 { 571 save_term = s; 572 saved_term = 1; 573 } 574 #if HAVE_OSPEED 575 ospeed = s.c_cflag & CBAUD; 576 #endif 577 erase_char = s.c_cc[VERASE]; 578 kill_char = s.c_cc[VKILL]; 579 #ifdef VWERASE 580 werase_char = s.c_cc[VWERASE]; 581 #else 582 werase_char = CONTROL('W'); 583 #endif 584 585 /* 586 * Set the modes to the way we want them. 587 */ 588 set_termio_flags(&s); 589 s.c_cc[VMIN] = 1; 590 s.c_cc[VTIME] = 0; 591 #ifdef VSTOP 592 s.c_cc[VSTOP] = 0; 593 #endif 594 #ifdef VSTART 595 s.c_cc[VSTART] = 0; 596 #endif 597 } else 598 { 599 /* 600 * Restore saved modes. 601 */ 602 s = save_term; 603 } 604 ioctl(tty, TCSETAW, &s); 605 } 606 #else 607 #ifdef TIOCGETP 608 { 609 struct sgttyb s; 610 static struct sgttyb save_term; 611 static int saved_term = 0; 612 613 if (on) 614 { 615 /* 616 * Get terminal modes. 617 */ 618 ioctl(tty, TIOCGETP, &s); 619 620 /* 621 * Save modes and set certain variables dependent on modes. 622 */ 623 if (!saved_term) 624 { 625 save_term = s; 626 saved_term = 1; 627 } 628 #if HAVE_OSPEED 629 ospeed = s.sg_ospeed; 630 #endif 631 erase_char = s.sg_erase; 632 kill_char = s.sg_kill; 633 werase_char = CONTROL('W'); 634 635 /* 636 * Set the modes to the way we want them. 637 */ 638 s.sg_flags |= CBREAK; 639 s.sg_flags &= ~(ECHO); 640 } else 641 { 642 /* 643 * Restore saved modes. 644 */ 645 s = save_term; 646 } 647 ioctl(tty, TIOCSETN, &s); 648 } 649 #else 650 #ifdef _OSK 651 { 652 struct sgbuf s; 653 static struct sgbuf save_term; 654 static int saved_term = 0; 655 656 if (on) 657 { 658 /* 659 * Get terminal modes. 660 */ 661 _gs_opt(tty, &s); 662 663 /* 664 * Save modes and set certain variables dependent on modes. 665 */ 666 if (!saved_term) 667 { 668 save_term = s; 669 saved_term = 1; 670 } 671 erase_char = s.sg_bspch; 672 kill_char = s.sg_dlnch; 673 werase_char = CONTROL('W'); 674 675 /* 676 * Set the modes to the way we want them. 677 */ 678 s.sg_echo = 0; 679 s.sg_eofch = 0; 680 s.sg_pause = 0; 681 s.sg_psch = 0; 682 } else 683 { 684 /* 685 * Restore saved modes. 686 */ 687 s = save_term; 688 } 689 _ss_opt(tty, &s); 690 } 691 #else 692 /* MS-DOS, Windows, or OS2 */ 693 #if OS2 694 /* OS2 */ 695 LSIGNAL(SIGINT, SIG_IGN); 696 #endif 697 erase_char = '\b'; 698 #if MSDOS_COMPILER==DJGPPC 699 kill_char = CONTROL('U'); 700 /* 701 * So that when we shell out or run another program, its 702 * stdin is in cooked mode. We do not switch stdin to binary 703 * mode if fd0 is zero, since that means we were called before 704 * tty was reopened in open_getchr, in which case we would be 705 * changing the original stdin device outside less. 706 */ 707 if (fd0 != 0) 708 setmode(0, on ? O_BINARY : O_TEXT); 709 #else 710 kill_char = ESC; 711 #endif 712 werase_char = CONTROL('W'); 713 #endif 714 #endif 715 #endif 716 #endif 717 curr_on = on; 718 } 719 720 #if !MSDOS_COMPILER 721 722 /* 723 * Some glue to prevent calling termcap functions if tgetent() failed. 724 */ 725 static int hardcopy; 726 727 static constant char * ltget_env(constant char *tiname, constant char *tcname) 728 { 729 char envname[64]; 730 constant char *s; 731 732 if (termcap_debug) 733 { 734 struct env { struct env *next; char *name; char *value; }; 735 constant char *capname = tcname != NULL ? tcname : tiname; 736 static struct env *envs = NULL; 737 struct env *p; 738 for (p = envs; p != NULL; p = p->next) 739 if (strcmp(p->name, capname) == 0) 740 return p->value; 741 p = (struct env *) ecalloc(1, sizeof(struct env)); 742 p->name = save(capname); 743 p->value = (char *) ecalloc(strlen(capname)+3, sizeof(char)); 744 sprintf(p->value, "<%s>", capname); 745 p->next = envs; 746 envs = p; 747 return p->value; 748 } 749 if (tiname != NULL) 750 { 751 SNPRINTF1(envname, sizeof(envname), "LESS_TERMINFO_%s", tiname); 752 s = lgetenv(envname); 753 if (!isnullenv(s)) 754 return s; 755 } 756 if (tcname != NULL) 757 { 758 SNPRINTF1(envname, sizeof(envname), "LESS_TERMCAP_%s", tcname); 759 s = lgetenv(envname); 760 if (!isnullenv(s)) 761 return s; 762 } 763 return NULL; 764 } 765 766 static int ltgetflag(constant char *tiname, constant char *tcname) 767 { 768 constant char *s; 769 770 if ((s = ltget_env(tiname, tcname)) != NULL) 771 return (*s != '\0' && *s != '0'); 772 if (hardcopy) 773 return (0); 774 #if USE_TERMINFO 775 return tiname == NULL ? 0 : tigetflag(tiname); 776 #else 777 return tcname == NULL ? 0 : tgetflag(tcname); 778 #endif 779 } 780 781 static int ltgetnum(constant char *tiname, constant char *tcname) 782 { 783 constant char *s; 784 785 if ((s = ltget_env(tiname, tcname)) != NULL) 786 return (atoi(s)); 787 if (hardcopy) 788 return (-1); 789 #if USE_TERMINFO 790 return tiname == NULL ? -1 : tigetnum(tiname); 791 #else 792 return tcname == NULL ? -1 : tgetnum(tcname); 793 #endif 794 } 795 796 static constant char * ltgetstr(constant char *tiname, constant char *tcname, char **pp) 797 { 798 constant char *s; 799 800 if ((s = ltget_env(tiname, tcname)) != NULL) 801 return (s); 802 if (hardcopy) 803 return (NULL); 804 #if USE_TERMINFO 805 if (tiname == NULL) 806 return (NULL); 807 s = tigetstr(tiname); 808 if (s == (constant char *)-1) 809 s = NULL; 810 return (s); 811 #else 812 if (tcname == NULL) 813 return (NULL); 814 return tgetstr(tcname, pp); 815 #endif 816 } 817 #endif /* MSDOS_COMPILER */ 818 819 /* 820 * Get size of the output screen. 821 */ 822 public void scrsize(void) 823 { 824 constant char *s; 825 int sys_height; 826 int sys_width; 827 #if !MSDOS_COMPILER 828 int n; 829 #endif 830 831 #define DEF_SC_WIDTH 80 832 #if MSDOS_COMPILER 833 #define DEF_SC_HEIGHT 25 834 #else 835 #define DEF_SC_HEIGHT 24 836 #endif 837 838 sys_width = sys_height = 0; 839 840 #if LESSTEST 841 if (0) /* can't use is_lesstest(): ttyin_name may not be set by scan_option yet */ 842 #endif /*LESSTEST*/ 843 { 844 #if MSDOS_COMPILER==MSOFTC 845 { 846 struct videoconfig w; 847 _getvideoconfig(&w); 848 sys_height = w.numtextrows; 849 sys_width = w.numtextcols; 850 } 851 #else 852 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 853 { 854 struct text_info w; 855 gettextinfo(&w); 856 sys_height = w.screenheight; 857 sys_width = w.screenwidth; 858 } 859 #else 860 #if MSDOS_COMPILER==WIN32C 861 { 862 CONSOLE_SCREEN_BUFFER_INFO scr; 863 GetConsoleScreenBufferInfo(con_out, &scr); 864 sys_height = scr.srWindow.Bottom - scr.srWindow.Top + 1; 865 sys_width = scr.srWindow.Right - scr.srWindow.Left + 1; 866 } 867 #else 868 #if OS2 869 { 870 int s[2]; 871 _scrsize(s); 872 sys_width = s[0]; 873 sys_height = s[1]; 874 /* 875 * When using terminal emulators for XFree86/OS2, the 876 * _scrsize function does not work well. 877 * Call the scrsize.exe program to get the window size. 878 */ 879 windowid = getenv("WINDOWID"); 880 if (windowid != NULL) 881 { 882 FILE *fd = popen("scrsize", "rt"); 883 if (fd != NULL) 884 { 885 int w, h; 886 fscanf(fd, "%i %i", &w, &h); 887 if (w > 0 && h > 0) 888 { 889 sys_width = w; 890 sys_height = h; 891 } 892 pclose(fd); 893 } 894 } 895 } 896 #else 897 #ifdef TIOCGWINSZ 898 { 899 struct winsize w; 900 if (ioctl(2, TIOCGWINSZ, &w) == 0) 901 { 902 if (w.ws_row > 0) 903 sys_height = w.ws_row; 904 if (w.ws_col > 0) 905 sys_width = w.ws_col; 906 } 907 } 908 #else 909 #ifdef WIOCGETD 910 { 911 struct uwdata w; 912 if (ioctl(2, WIOCGETD, &w) == 0) 913 { 914 if (w.uw_height > 0) 915 sys_height = w.uw_height / w.uw_vs; 916 if (w.uw_width > 0) 917 sys_width = w.uw_width / w.uw_hs; 918 } 919 } 920 #endif 921 #endif 922 #endif 923 #endif 924 #endif 925 #endif 926 } 927 928 if (sys_height > 0) 929 sc_height = sys_height; 930 else if ((s = lgetenv("LINES")) != NULL) 931 sc_height = atoi(s); 932 #if !MSDOS_COMPILER 933 else if ((n = ltgetnum("lines", "li")) > 0) 934 sc_height = n; 935 #endif 936 if ((s = lgetenv("LESS_LINES")) != NULL) 937 { 938 int height = atoi(s); 939 sc_height = (height < 0) ? sc_height + height : height; 940 full_screen = FALSE; 941 } 942 if (sc_height <= 0) 943 sc_height = DEF_SC_HEIGHT; 944 945 if (sys_width > 0) 946 sc_width = sys_width; 947 else if ((s = lgetenv("COLUMNS")) != NULL) 948 sc_width = atoi(s); 949 #if !MSDOS_COMPILER 950 else if ((n = ltgetnum("cols", "co")) > 0) 951 sc_width = n; 952 #endif 953 if ((s = lgetenv("LESS_COLUMNS")) != NULL) 954 { 955 int width = atoi(s); 956 sc_width = (width < 0) ? sc_width + width : width; 957 } 958 if (sc_width <= 0) 959 sc_width = DEF_SC_WIDTH; 960 screen_size_changed(); 961 } 962 963 /* 964 * Recalculate things that depend on the screen size. 965 */ 966 public void screen_size_changed(void) 967 { 968 constant char *env = lgetenv("LESS_SHELL_LINES"); 969 shell_lines = isnullenv(env) ? 1 : atoi(env); 970 if (shell_lines >= sc_height) 971 shell_lines = sc_height - 1; 972 wscroll = (sc_height + 1) / 2; 973 calc_jump_sline(); 974 calc_shift_count(); 975 calc_match_shift(); 976 } 977 978 #if MSDOS_COMPILER==MSOFTC 979 /* 980 * Figure out how many empty loops it takes to delay a millisecond. 981 */ 982 static void get_clock(void) 983 { 984 clock_t start; 985 986 /* 987 * Get synchronized at the start of a tick. 988 */ 989 start = clock(); 990 while (clock() == start) 991 ; 992 /* 993 * Now count loops till the next tick. 994 */ 995 start = clock(); 996 msec_loops = 0; 997 while (clock() == start) 998 msec_loops++; 999 /* 1000 * Convert from (loops per clock) to (loops per millisecond). 1001 */ 1002 msec_loops *= CLOCKS_PER_SEC; 1003 msec_loops /= 1000; 1004 } 1005 1006 /* 1007 * Delay for a specified number of milliseconds. 1008 */ 1009 static void delay(int msec) 1010 { 1011 long i; 1012 1013 while (msec-- > 0) 1014 { 1015 for (i = 0; i < msec_loops; i++) 1016 (void) clock(); 1017 } 1018 } 1019 #endif 1020 1021 /* 1022 * Return the characters actually input by a "special" key. 1023 */ 1024 public constant char * special_key_str(int key) 1025 { 1026 static char tbuf[40]; 1027 constant char *s; 1028 #if MSDOS_COMPILER || OS2 1029 static char k_right[] = { '\340', PCK_RIGHT, 0 }; 1030 static char k_left[] = { '\340', PCK_LEFT, 0 }; 1031 static char k_ctl_right[] = { '\340', PCK_CTL_RIGHT, 0 }; 1032 static char k_ctl_left[] = { '\340', PCK_CTL_LEFT, 0 }; 1033 static char k_insert[] = { '\340', PCK_INSERT, 0 }; 1034 static char k_delete[] = { '\340', PCK_DELETE, 0 }; 1035 static char k_ctl_delete[] = { '\340', PCK_CTL_DELETE, 0 }; 1036 static char k_ctl_backspace[] = { '\177', 0 }; 1037 static char k_backspace[] = { '\b', 0 }; 1038 static char k_home[] = { '\340', PCK_HOME, 0 }; 1039 static char k_end[] = { '\340', PCK_END, 0 }; 1040 static char k_up[] = { '\340', PCK_UP, 0 }; 1041 static char k_down[] = { '\340', PCK_DOWN, 0 }; 1042 static char k_backtab[] = { '\340', PCK_SHIFT_TAB, 0 }; 1043 static char k_pagedown[] = { '\340', PCK_PAGEDOWN, 0 }; 1044 static char k_pageup[] = { '\340', PCK_PAGEUP, 0 }; 1045 static char k_ctl_home[] = { '\340', PCK_CTL_HOME, 0 }; 1046 static char k_ctl_end[] = { '\340', PCK_CTL_END, 0 }; 1047 static char k_shift_home[] = { '\340', PCK_SHIFT_HOME, 0 }; 1048 static char k_shift_end[] = { '\340', PCK_SHIFT_END, 0 }; 1049 static char k_f1[] = { '\340', PCK_F1, 0 }; 1050 #endif 1051 #if !MSDOS_COMPILER 1052 char *sp = tbuf; 1053 #endif 1054 1055 switch (key) 1056 { 1057 #if OS2 1058 /* 1059 * If windowid is not NULL, assume less is executed in 1060 * the XFree86 environment. 1061 */ 1062 case SK_RIGHT_ARROW: 1063 s = windowid ? ltgetstr("kcuf1", "kr", &sp) : k_right; 1064 break; 1065 case SK_LEFT_ARROW: 1066 s = windowid ? ltgetstr("kcub1", "kl", &sp) : k_left; 1067 break; 1068 case SK_UP_ARROW: 1069 s = windowid ? ltgetstr("kcuu1", "ku", &sp) : k_up; 1070 break; 1071 case SK_DOWN_ARROW: 1072 s = windowid ? ltgetstr("kcud1", "kd", &sp) : k_down; 1073 break; 1074 case SK_PAGE_UP: 1075 s = windowid ? ltgetstr("kpp", "kP", &sp) : k_pageup; 1076 break; 1077 case SK_PAGE_DOWN: 1078 s = windowid ? ltgetstr("knp", "kN", &sp) : k_pagedown; 1079 break; 1080 case SK_HOME: 1081 s = windowid ? ltgetstr("khome", "kh", &sp) : k_home; 1082 break; 1083 case SK_END: 1084 s = windowid ? ltgetstr("kend", "@7", &sp) : k_end; 1085 break; 1086 case SK_F1: 1087 s = windowid ? ltgetstr("kf1", "k1", &sp) : k_f1; 1088 break; 1089 case SK_DELETE: 1090 s = windowid ? ltgetstr("kdch1", "kD", &sp) : k_delete; 1091 if (s == NULL) 1092 { 1093 tbuf[0] = '\177'; 1094 tbuf[1] = '\0'; 1095 s = tbuf; 1096 } 1097 break; 1098 #endif 1099 #if MSDOS_COMPILER 1100 case SK_RIGHT_ARROW: 1101 s = k_right; 1102 break; 1103 case SK_LEFT_ARROW: 1104 s = k_left; 1105 break; 1106 case SK_UP_ARROW: 1107 s = k_up; 1108 break; 1109 case SK_DOWN_ARROW: 1110 s = k_down; 1111 break; 1112 case SK_PAGE_UP: 1113 s = k_pageup; 1114 break; 1115 case SK_PAGE_DOWN: 1116 s = k_pagedown; 1117 break; 1118 case SK_HOME: 1119 s = k_home; 1120 break; 1121 case SK_END: 1122 s = k_end; 1123 break; 1124 case SK_DELETE: 1125 s = k_delete; 1126 break; 1127 #endif 1128 #if MSDOS_COMPILER || OS2 1129 case SK_INSERT: 1130 s = k_insert; 1131 break; 1132 case SK_CTL_LEFT_ARROW: 1133 s = k_ctl_left; 1134 break; 1135 case SK_CTL_RIGHT_ARROW: 1136 s = k_ctl_right; 1137 break; 1138 case SK_CTL_BACKSPACE: 1139 s = k_ctl_backspace; 1140 break; 1141 case SK_CTL_DELETE: 1142 s = k_ctl_delete; 1143 break; 1144 case SK_BACKSPACE: 1145 s = k_backspace; 1146 break; 1147 case SK_F1: 1148 s = k_f1; 1149 break; 1150 case SK_BACKTAB: 1151 s = k_backtab; 1152 break; 1153 case SK_SHIFT_HOME: 1154 s = k_shift_home; 1155 break; 1156 case SK_CTL_HOME: 1157 s = k_ctl_home; 1158 break; 1159 case SK_SHIFT_END: 1160 s = k_shift_end; 1161 break; 1162 case SK_CTL_END: 1163 s = k_ctl_end; 1164 break; 1165 #else 1166 case SK_RIGHT_ARROW: 1167 s = ltgetstr("kcuf1", "kr", &sp); 1168 break; 1169 case SK_LEFT_ARROW: 1170 s = ltgetstr("kcub1", "kl", &sp); 1171 break; 1172 case SK_UP_ARROW: 1173 s = ltgetstr("kcuu1", "ku", &sp); 1174 break; 1175 case SK_DOWN_ARROW: 1176 s = ltgetstr("kcud1", "kd", &sp); 1177 break; 1178 case SK_PAGE_UP: 1179 s = ltgetstr("kpp", "kP", &sp); 1180 break; 1181 case SK_PAGE_DOWN: 1182 s = ltgetstr("knp", "kN", &sp); 1183 break; 1184 case SK_HOME: 1185 s = ltgetstr("khome", "kh", &sp); 1186 break; 1187 case SK_SHIFT_HOME: 1188 s = ltgetstr("kHOM", "#2", &sp); 1189 break; 1190 case SK_CTL_HOME: 1191 s = ltgetstr("kHOM5", NULL, &sp); 1192 break; 1193 case SK_END: 1194 s = ltgetstr("kend", "@7", &sp); 1195 break; 1196 case SK_SHIFT_END: 1197 s = ltgetstr("kEND", "#7", &sp); 1198 break; 1199 case SK_CTL_END: 1200 s = ltgetstr("kEND5", NULL, &sp); 1201 break; 1202 case SK_INSERT: 1203 s = ltgetstr("kich1", "kI", &sp); 1204 break; 1205 case SK_BACKTAB: 1206 s = ltgetstr("kcbt", "kB", &sp); 1207 break; 1208 case SK_CTL_RIGHT_ARROW: 1209 s = ltgetstr("kRIT5", NULL, &sp); 1210 break; 1211 case SK_CTL_LEFT_ARROW: 1212 s = ltgetstr("kLFT5", NULL, &sp); 1213 break; 1214 case SK_F1: 1215 s = ltgetstr("kf1", "k1", &sp); 1216 break; 1217 case SK_PAD_UL: 1218 s = ltgetstr("ka1", "K1", &sp); 1219 break; 1220 case SK_PAD_U: 1221 s = ltgetstr("ka2", NULL, &sp); 1222 break; 1223 case SK_PAD_UR: 1224 s = ltgetstr("ka3", "K3", &sp); 1225 break; 1226 case SK_PAD_L: 1227 s = ltgetstr("kb1", NULL, &sp); 1228 break; 1229 case SK_PAD_CENTER: 1230 s = ltgetstr("kb2", "K2", &sp); 1231 break; 1232 case SK_PAD_R: 1233 s = ltgetstr("kb3", NULL, &sp); 1234 break; 1235 case SK_PAD_DL: 1236 s = ltgetstr("kc1", "K4", &sp); 1237 break; 1238 case SK_PAD_D: 1239 s = ltgetstr("kc2", NULL, &sp); 1240 break; 1241 case SK_PAD_DR: 1242 s = ltgetstr("kc3", "K5", &sp); 1243 break; 1244 case SK_PAD_STAR: 1245 s = ltgetstr("kpMUL", NULL, &sp); 1246 break; 1247 case SK_PAD_SLASH: 1248 s = ltgetstr("kpDIV", NULL, &sp); 1249 break; 1250 case SK_PAD_DASH: 1251 s = ltgetstr("kpSUB", NULL, &sp); 1252 break; 1253 case SK_PAD_PLUS: 1254 s = ltgetstr("kpADD", NULL, &sp); 1255 break; 1256 case SK_PAD_DOT: 1257 s = ltgetstr("kpDOT", NULL, &sp); 1258 break; 1259 case SK_PAD_COMMA: 1260 s = ltgetstr("kpCMA", NULL, &sp); 1261 break; 1262 case SK_PAD_ZERO: 1263 s = ltgetstr("kpZRO", NULL, &sp); 1264 break; 1265 case SK_DELETE: 1266 s = ltgetstr("kdch1", "kD", &sp); 1267 if (s == NULL) 1268 { 1269 tbuf[0] = '\177'; 1270 tbuf[1] = '\0'; 1271 s = tbuf; 1272 } 1273 break; 1274 case SK_BACKSPACE: 1275 s = ltgetstr("kbs", "kb", &sp); 1276 if (s == NULL) 1277 { 1278 tbuf[0] = '\b'; 1279 tbuf[1] = '\0'; 1280 s = tbuf; 1281 } 1282 break; 1283 #endif 1284 case SK_CONTROL_K: 1285 tbuf[0] = CONTROL('K'); 1286 tbuf[1] = '\0'; 1287 s = tbuf; 1288 break; 1289 default: 1290 return (NULL); 1291 } 1292 return (s); 1293 } 1294 1295 #if !MSDOS_COMPILER 1296 static constant char *ltgoto(constant char *cap, int col, int line) 1297 { 1298 #if USE_TERMINFO 1299 return tparm(cap, line, col); 1300 #else 1301 return tgoto(cap, col, line); 1302 #endif 1303 } 1304 #endif /* MSDOS_COMPILER */ 1305 1306 #if MSDOS_COMPILER 1307 public void init_win_colors(void) 1308 { 1309 if (nm_fg_color == CV_ERROR || nm_fg_color == CV_NOCHANGE) nm_fg_color = sy_fg_color; 1310 if (nm_bg_color == CV_ERROR || nm_bg_color == CV_NOCHANGE) nm_bg_color = sy_bg_color; 1311 if (bo_fg_color == CV_NOCHANGE) bo_fg_color = sy_fg_color; else if (bo_fg_color == CV_ERROR) bo_fg_color = sy_fg_color | 8; 1312 if (bo_bg_color == CV_NOCHANGE) bo_bg_color = sy_bg_color; else if (bo_bg_color == CV_ERROR) bo_bg_color = sy_bg_color; 1313 if (ul_fg_color == CV_NOCHANGE) ul_fg_color = sy_fg_color; else if (ul_fg_color == CV_ERROR) ul_fg_color = (sy_bg_color == 3 || sy_bg_color == 11) ? 0 : 11; 1314 if (ul_bg_color == CV_NOCHANGE) ul_bg_color = sy_bg_color; else if (ul_bg_color == CV_ERROR) ul_bg_color = sy_bg_color; 1315 if (so_fg_color == CV_NOCHANGE) so_fg_color = sy_fg_color; else if (so_fg_color == CV_ERROR) so_fg_color = sy_bg_color; 1316 if (so_bg_color == CV_NOCHANGE) so_bg_color = sy_bg_color; else if (so_bg_color == CV_ERROR) so_bg_color = sy_fg_color; 1317 if (bl_fg_color == CV_NOCHANGE) bl_fg_color = sy_fg_color; else if (bl_fg_color == CV_ERROR) bl_fg_color = ul_bg_color; 1318 if (bl_bg_color == CV_NOCHANGE) bl_bg_color = sy_bg_color; else if (bl_bg_color == CV_ERROR) bl_bg_color = ul_fg_color; 1319 nm_fg_color |= nm_attr; 1320 bo_fg_color |= bo_attr; 1321 ul_fg_color |= ul_attr; 1322 so_fg_color |= so_attr; 1323 bl_fg_color |= bl_attr; 1324 } 1325 #endif /* MSDOS_COMPILER */ 1326 1327 /* 1328 * Get terminal capabilities via termcap. 1329 */ 1330 public void get_term() 1331 { 1332 termcap_debug = !isnullenv(lgetenv("LESS_TERMCAP_DEBUG")); 1333 #if MSDOS_COMPILER 1334 auto_wrap = 1; 1335 defer_wrap = 0; 1336 can_goto_line = 1; 1337 clear_bg = 1; 1338 /* 1339 * Set up default colors. 1340 * The xx_s_width and xx_e_width vars are already initialized to 0. 1341 */ 1342 #if MSDOS_COMPILER==MSOFTC 1343 sy_bg_color = _getbkcolor(); 1344 sy_fg_color = _gettextcolor(); 1345 get_clock(); 1346 #else 1347 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 1348 { 1349 struct text_info w; 1350 gettextinfo(&w); 1351 sy_bg_color = (w.attribute >> 4) & 0x0F; 1352 sy_fg_color = (w.attribute >> 0) & 0x0F; 1353 } 1354 #else 1355 #if MSDOS_COMPILER==WIN32C 1356 { 1357 CONSOLE_SCREEN_BUFFER_INFO scr; 1358 1359 con_out_save = con_out = GetStdHandle(STD_OUTPUT_HANDLE); 1360 /* 1361 * Always open stdin in binary. Note this *must* be done 1362 * before any file operations have been done on fd0. 1363 */ 1364 SET_BINARY(0); 1365 GetConsoleMode(con_out, &init_console_output_mode); 1366 GetConsoleScreenBufferInfo(con_out, &scr); 1367 curr_attr = scr.wAttributes; 1368 sy_bg_color = (curr_attr & BG_COLORS) >> 4; /* normalize */ 1369 sy_fg_color = curr_attr & FG_COLORS; 1370 } 1371 #endif 1372 #endif 1373 #endif 1374 init_win_colors(); 1375 1376 /* 1377 * Get size of the screen. 1378 */ 1379 scrsize(); 1380 pos_init(); 1381 1382 #else /* !MSDOS_COMPILER */ 1383 { 1384 constant char *t1; 1385 constant char *t2; 1386 constant char *term; 1387 char *sp; 1388 /* 1389 * Some termcap libraries assume termbuf is static 1390 * (accessible after tgetent returns). 1391 */ 1392 #if !USE_TERMINFO 1393 static char termbuf[TERMBUF_SIZE]; 1394 #endif 1395 static char sbuf[TERMSBUF_SIZE]; 1396 1397 #if OS2 1398 /* 1399 * Make sure the termcap database is available. 1400 */ 1401 constant char *cp = lgetenv("TERMCAP"); 1402 if (isnullenv(cp)) 1403 { 1404 char *termcap; 1405 if ((sp = homefile("termcap.dat")) != NULL) 1406 { 1407 termcap = (char *) ecalloc(strlen(sp)+9, sizeof(char)); 1408 sprintf(termcap, "TERMCAP=%s", sp); 1409 free(sp); 1410 putenv(termcap); 1411 } 1412 } 1413 #endif 1414 /* 1415 * Find out what kind of terminal this is. 1416 */ 1417 if ((term = lgetenv("TERM")) == NULL && (term = getenv("TERM")) == NULL) 1418 term = DEFAULT_TERM; 1419 hardcopy = 0; 1420 #if USE_TERMINFO 1421 if (setupterm(term, -1, NULL) != OK) 1422 hardcopy = 1; 1423 #else 1424 if (tgetent(termbuf, term) != TGETENT_OK) 1425 hardcopy = 1; 1426 #endif 1427 if (!hardcopy && ltgetflag("hc", "hc")) 1428 hardcopy = 1; 1429 1430 /* 1431 * Get size of the screen. 1432 */ 1433 scrsize(); 1434 pos_init(); 1435 1436 auto_wrap = ltgetflag("am", "am"); 1437 defer_wrap = ltgetflag("xenl", "xn"); 1438 above_mem = ltgetflag("da", "da"); 1439 below_mem = ltgetflag("db", "db"); 1440 clear_bg = ltgetflag("bce", "ut"); 1441 no_alt_screen = ltgetflag("nrrmc", "NR"); 1442 1443 /* 1444 * Assumes termcap variable "sg" is the printing width of: 1445 * the standout sequence, the end standout sequence, 1446 * the underline sequence, the end underline sequence, 1447 * the boldface sequence, and the end boldface sequence. 1448 */ 1449 if ((so_s_width = ltgetnum("xmc", "sg")) < 0) 1450 so_s_width = 0; 1451 so_e_width = so_s_width; 1452 1453 bo_s_width = bo_e_width = so_s_width; 1454 ul_s_width = ul_e_width = so_s_width; 1455 bl_s_width = bl_e_width = so_s_width; 1456 1457 #if HILITE_SEARCH 1458 if (so_s_width > 0 || so_e_width > 0) 1459 /* 1460 * Disable highlighting by default on magic cookie terminals. 1461 * Turning on highlighting might change the displayed width 1462 * of a line, causing the display to get messed up. 1463 * The user can turn it back on with -g, 1464 * but she won't like the results. 1465 */ 1466 hilite_search = 0; 1467 #endif 1468 1469 /* 1470 * Get various string-valued capabilities. 1471 */ 1472 sp = sbuf; 1473 1474 #if HAVE_OSPEED 1475 sc_pad = ltgetstr("pad", "pc", &sp); 1476 if (sc_pad != NULL) 1477 PC = *sc_pad; 1478 #endif 1479 1480 sc_s_keypad = ltgetstr("smkx", "ks", &sp); 1481 if (sc_s_keypad == NULL) 1482 sc_s_keypad = ""; 1483 sc_e_keypad = ltgetstr("rmkx", "ke", &sp); 1484 if (sc_e_keypad == NULL) 1485 sc_e_keypad = ""; 1486 kent = ltgetstr("kent", "@8", &sp); 1487 1488 sc_s_mousecap = ltgetstr("MOUSE_START", "MOUSE_START", &sp); 1489 if (sc_s_mousecap == NULL) 1490 sc_s_mousecap = ESCS "[?1000h" ESCS "[?1002h" ESCS "[?1006h"; 1491 sc_e_mousecap = ltgetstr("MOUSE_END", "MOUSE_END", &sp); 1492 if (sc_e_mousecap == NULL) 1493 sc_e_mousecap = ESCS "[?1006l" ESCS "[?1002l" ESCS "[?1000l"; 1494 1495 sc_s_bracketed_paste = ltgetstr("BRACKETED_PASTE_START", "BRACKETED_PASTE_START", &sp); 1496 if (sc_s_bracketed_paste == NULL) 1497 sc_s_bracketed_paste = ESCS"[?2004h"; 1498 sc_e_bracketed_paste = ltgetstr("BRACKETED_PASTE_END", "BRACKETED_PASTE_END", &sp); 1499 if (sc_e_bracketed_paste == NULL) 1500 sc_e_bracketed_paste = ESCS"[?2004l"; 1501 1502 sc_suspend = ltgetstr("SUSPEND", "SUSPEND", &sp); 1503 if (sc_suspend == NULL) 1504 sc_suspend = ""; 1505 sc_resume = ltgetstr("RESUME", "RESUME", &sp); 1506 if (sc_resume == NULL) 1507 sc_resume = ""; 1508 1509 sc_init = ltgetstr("smcup", "ti", &sp); 1510 if (sc_init == NULL) 1511 sc_init = ""; 1512 1513 sc_deinit= ltgetstr("rmcup", "te", &sp); 1514 if (sc_deinit == NULL) 1515 sc_deinit = ""; 1516 1517 sc_eol_clear = ltgetstr("el", "ce", &sp); 1518 if (sc_eol_clear == NULL || *sc_eol_clear == '\0') 1519 { 1520 missing_cap = TRUE; 1521 sc_eol_clear = ""; 1522 } 1523 1524 sc_eos_clear = ltgetstr("ed", "cd", &sp); 1525 if (below_mem && (sc_eos_clear == NULL || *sc_eos_clear == '\0')) 1526 { 1527 missing_cap = TRUE; 1528 sc_eos_clear = ""; 1529 } 1530 1531 sc_clear = ltgetstr("clear", "cl", &sp); 1532 if (sc_clear == NULL || *sc_clear == '\0') 1533 { 1534 missing_cap = TRUE; 1535 sc_clear = "\n\n"; 1536 } 1537 1538 sc_move = ltgetstr("cup", "cm", &sp); 1539 if (sc_move == NULL || *sc_move == '\0') 1540 { 1541 /* 1542 * This is not an error here, because we don't 1543 * always need sc_move. 1544 * We need it only if we don't have home or lower-left. 1545 */ 1546 sc_move = ""; 1547 can_goto_line = 0; 1548 } else 1549 can_goto_line = 1; 1550 1551 tmodes("smso", "rmso", "so", "se", &sc_s_in, &sc_s_out, "", "", &sp); 1552 tmodes("smul", "rmul", "us", "ue", &sc_u_in, &sc_u_out, sc_s_in, sc_s_out, &sp); 1553 tmodes("bold", "sgr0", "md", "me", &sc_b_in, &sc_b_out, sc_s_in, sc_s_out, &sp); 1554 tmodes("blink", "sgr0", "mb", "me", &sc_bl_in, &sc_bl_out, sc_s_in, sc_s_out, &sp); 1555 1556 sc_visual_bell = ltgetstr("flash", "vb", &sp); 1557 if (sc_visual_bell == NULL) 1558 sc_visual_bell = ""; 1559 1560 if (ltgetflag(NULL, "bs")) 1561 sc_backspace = "\b"; 1562 else 1563 { 1564 sc_backspace = ltgetstr("OTbc", "bc", &sp); 1565 if (sc_backspace == NULL || *sc_backspace == '\0') 1566 sc_backspace = "\b"; 1567 } 1568 1569 /* 1570 * Choose between using "ho" and "cm" ("home" and "cursor move") 1571 * to move the cursor to the upper left corner of the screen. 1572 */ 1573 t1 = ltgetstr("home", "ho", &sp); 1574 if (t1 == NULL) 1575 t1 = ""; 1576 if (*sc_move == '\0') 1577 t2 = ""; 1578 else 1579 { 1580 strcpy(sp, ltgoto(sc_move, 0, 0)); 1581 t2 = sp; 1582 sp += strlen(sp) + 1; 1583 } 1584 sc_home = cheaper(t1, t2, "|\b^"); 1585 1586 /* 1587 * Choose between using "ll" and "cm" ("lower left" and "cursor move") 1588 * to move the cursor to the lower left corner of the screen. 1589 */ 1590 t1 = ltgetstr("ll", "ll", &sp); 1591 if (t1 == NULL || !full_screen) 1592 t1 = ""; 1593 if (*sc_move == '\0') 1594 t2 = ""; 1595 else 1596 { 1597 strcpy(sp, ltgoto(sc_move, 0, sc_height-1)); 1598 t2 = sp; 1599 sp += strlen(sp) + 1; 1600 } 1601 sc_lower_left = cheaper(t1, t2, "\r"); 1602 1603 /* 1604 * Get carriage return string. 1605 */ 1606 sc_return = ltgetstr("cr", "cr", &sp); 1607 if (sc_return == NULL) 1608 sc_return = "\r"; 1609 1610 /* 1611 * Choose between using "al" or "sr" ("add line" or "scroll reverse") 1612 * to add a line at the top of the screen. 1613 */ 1614 t1 = ltgetstr("ill", "al", &sp); 1615 if (t1 == NULL) 1616 t1 = ""; 1617 t2 = ltgetstr("ri", "sr", &sp); 1618 if (t2 == NULL) 1619 t2 = ""; 1620 if (*t1 == '\0' && *t2 == '\0') 1621 sc_addline = ""; 1622 else if (above_mem) 1623 sc_addline = t1; 1624 else 1625 sc_addline = cheaper(t1, t2, ""); 1626 if (*sc_addline == '\0') 1627 { 1628 /* 1629 * Force repaint on any backward movement. 1630 */ 1631 no_back_scroll = 1; 1632 } 1633 } 1634 #endif /* MSDOS_COMPILER */ 1635 } 1636 1637 #if !MSDOS_COMPILER 1638 /* 1639 * Return the cost of displaying a termcap string. 1640 * We use the trick of calling tputs, but as a char printing function 1641 * we give it inc_costcount, which just increments "costcount". 1642 * This tells us how many chars would be printed by using this string. 1643 */ 1644 static int costcount; 1645 1646 /*ARGSUSED*/ 1647 static int inc_costcount(int c) 1648 { 1649 costcount++; 1650 return (c); 1651 } 1652 1653 static int cost(constant char *t) 1654 { 1655 costcount = 0; 1656 tputs(t, sc_height, inc_costcount); 1657 return (costcount); 1658 } 1659 1660 /* 1661 * Return the "best" of the two given termcap strings. 1662 * The best, if both exist, is the one with the lower 1663 * cost (see cost() function). 1664 */ 1665 static constant char * cheaper(constant char *t1, constant char *t2, constant char *def) 1666 { 1667 if (*t1 == '\0' && *t2 == '\0') 1668 { 1669 missing_cap = TRUE; 1670 return (def); 1671 } 1672 if (*t1 == '\0') 1673 return (t2); 1674 if (*t2 == '\0') 1675 return (t1); 1676 if (cost(t1) < cost(t2)) 1677 return (t1); 1678 return (t2); 1679 } 1680 1681 static void tmodes(constant char *inti, constant char *outti, constant char *intc, constant char *outtc, constant char **instr, constant char **outstr, constant char *def_instr, constant char *def_outstr, char **spp) 1682 { 1683 *instr = ltgetstr(inti, intc, spp); 1684 if (*instr == NULL) 1685 { 1686 /* Use defaults. */ 1687 *instr = def_instr; 1688 *outstr = def_outstr; 1689 return; 1690 } 1691 1692 *outstr = ltgetstr(outti, outtc, spp); 1693 if (*outstr == NULL) 1694 /* No specific out capability; use "me". */ 1695 *outstr = ltgetstr("sgr0", "me", spp); 1696 if (*outstr == NULL) 1697 /* Don't even have "me"; use a null string. */ 1698 *outstr = ""; 1699 } 1700 1701 #endif /* MSDOS_COMPILER */ 1702 1703 1704 /* 1705 * Below are the functions which perform all the 1706 * terminal-specific screen manipulation. 1707 */ 1708 1709 1710 #if MSDOS_COMPILER 1711 1712 #if MSDOS_COMPILER==WIN32C 1713 static void _settextposition(int row, int col) 1714 { 1715 COORD cpos; 1716 CONSOLE_SCREEN_BUFFER_INFO csbi; 1717 1718 GetConsoleScreenBufferInfo(con_out, &csbi); 1719 cpos.X = csbi.srWindow.Left + (col - 1); 1720 cpos.Y = csbi.srWindow.Top + (row - 1); 1721 SetConsoleCursorPosition(con_out, cpos); 1722 } 1723 #endif 1724 1725 /* 1726 * Initialize the screen to the correct color at startup. 1727 */ 1728 static void initcolor(void) 1729 { 1730 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 1731 intensevideo(); 1732 #endif 1733 SETCOLORS(nm_fg_color, nm_bg_color); 1734 #if 0 1735 /* 1736 * This clears the screen at startup. This is different from 1737 * the behavior of other versions of less. Disable it for now. 1738 */ 1739 char *blanks; 1740 int row; 1741 int col; 1742 1743 /* 1744 * Create a complete, blank screen using "normal" colors. 1745 */ 1746 SETCOLORS(nm_fg_color, nm_bg_color); 1747 blanks = (char *) ecalloc(width+1, sizeof(char)); 1748 for (col = 0; col < sc_width; col++) 1749 blanks[col] = ' '; 1750 blanks[sc_width] = '\0'; 1751 for (row = 0; row < sc_height; row++) 1752 _outtext(blanks); 1753 free(blanks); 1754 #endif 1755 } 1756 #endif 1757 1758 #if MSDOS_COMPILER==WIN32C 1759 1760 /* 1761 * Enable virtual terminal processing, if available. 1762 */ 1763 static void win32_init_vt_term(void) 1764 { 1765 if (vt_enabled == 0 || (vt_enabled == 1 && con_out == con_out_ours)) 1766 return; /* already initialized */ 1767 1768 /* don't care about the initial mode, and win VT hard-enables am+xn */ 1769 vt_enabled = SetConsoleMode(con_out, ENABLE_PROCESSED_OUTPUT | 1770 ENABLE_VIRTUAL_TERMINAL_PROCESSING | 1771 ENABLE_WRAP_AT_EOL_OUTPUT); 1772 if (vt_enabled) 1773 { 1774 auto_wrap = 1; 1775 defer_wrap = 1; 1776 } 1777 } 1778 1779 static void win32_deinit_vt_term(void) 1780 { 1781 if (vt_enabled == 1 && con_out == con_out_save) 1782 SetConsoleMode(con_out, init_console_output_mode); 1783 } 1784 1785 /* 1786 * Termcap-like init with a private win32 console. 1787 */ 1788 static void win32_init_term(void) 1789 { 1790 CONSOLE_SCREEN_BUFFER_INFO scr; 1791 COORD size; 1792 1793 if (con_out_save == INVALID_HANDLE_VALUE) 1794 return; 1795 1796 GetConsoleScreenBufferInfo(con_out_save, &scr); 1797 1798 if (con_out_ours == INVALID_HANDLE_VALUE) 1799 { 1800 /* 1801 * Create our own screen buffer, so that we 1802 * may restore the original when done. 1803 */ 1804 con_out_ours = CreateConsoleScreenBuffer( 1805 GENERIC_WRITE | GENERIC_READ, 1806 FILE_SHARE_WRITE | FILE_SHARE_READ, 1807 (LPSECURITY_ATTRIBUTES) NULL, 1808 CONSOLE_TEXTMODE_BUFFER, 1809 (LPVOID) NULL); 1810 1811 /* 1812 * We don't care about the initial state. We need processed 1813 * output without anything else (no wrap at EOL, no VT, 1814 * no disabled auto-return). 1815 */ 1816 if (SetConsoleMode(con_out_ours, ENABLE_PROCESSED_OUTPUT)) 1817 auto_wrap = 0; 1818 } 1819 1820 size.X = scr.srWindow.Right - scr.srWindow.Left + 1; 1821 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1; 1822 SetConsoleScreenBufferSize(con_out_ours, size); 1823 SetConsoleActiveScreenBuffer(con_out_ours); 1824 con_out = con_out_ours; 1825 } 1826 1827 /* 1828 * Restore the startup console. 1829 */ 1830 static void win32_deinit_term(void) 1831 { 1832 if (con_out_save == INVALID_HANDLE_VALUE) 1833 return; 1834 if (quitting) 1835 (void) CloseHandle(con_out_ours); 1836 SetConsoleActiveScreenBuffer(con_out_save); 1837 con_out = con_out_save; 1838 } 1839 1840 #endif 1841 1842 #if !MSDOS_COMPILER 1843 static void do_tputs(constant char *str, int affcnt, int (*f_putc)(int)) 1844 { 1845 #if LESSTEST 1846 if (is_lesstest() && f_putc == putchr) 1847 putstr(str); 1848 else 1849 #endif /*LESSTEST*/ 1850 tputs(str, affcnt, f_putc); 1851 } 1852 1853 /* 1854 * Like tputs but we handle $<...> delay strings here because 1855 * some implementations of tputs don't perform delays correctly. 1856 */ 1857 static void ltputs(constant char *str, int affcnt, int (*f_putc)(int)) 1858 { 1859 while (str != NULL && *str != '\0') 1860 { 1861 constant char *obrac = strstr(str, "$<"); 1862 if (obrac != NULL) 1863 { 1864 char str2[64]; 1865 size_t slen = ptr_diff(obrac, str); 1866 if (slen < sizeof(str2)) 1867 { 1868 int delay; 1869 /* Output first part of string (before "$<"). */ 1870 memcpy(str2, str, slen); 1871 str2[slen] = '\0'; 1872 do_tputs(str2, affcnt, f_putc); 1873 str += slen + 2; 1874 /* Perform the delay. */ 1875 delay = lstrtoic(str, &str, 10); 1876 if (*str == '*') 1877 if (ckd_mul(&delay, delay, affcnt)) 1878 delay = INT_MAX; 1879 flush(); 1880 sleep_ms(delay); 1881 /* Skip past closing ">" at end of delay string. */ 1882 str = strstr(str, ">"); 1883 if (str != NULL) 1884 str++; 1885 continue; 1886 } 1887 } 1888 /* Pass the rest of the string to tputs and we're done. */ 1889 do_tputs(str, affcnt, f_putc); 1890 break; 1891 } 1892 } 1893 #endif /* MSDOS_COMPILER */ 1894 1895 /* 1896 * Configure the terminal so mouse clicks and wheel moves 1897 * produce input to less. 1898 */ 1899 public void init_mouse(void) 1900 { 1901 #if !MSDOS_COMPILER 1902 ltputs(sc_s_mousecap, sc_height, putchr); 1903 #else 1904 #if MSDOS_COMPILER==WIN32C 1905 curr_console_input_mode = mouse_console_input_mode; 1906 SetConsoleMode(tty, curr_console_input_mode); 1907 #endif 1908 #endif 1909 } 1910 1911 /* 1912 * Configure the terminal so mouse clicks and wheel moves 1913 * are handled by the system (so text can be selected, etc). 1914 */ 1915 public void deinit_mouse(void) 1916 { 1917 #if !MSDOS_COMPILER 1918 ltputs(sc_e_mousecap, sc_height, putchr); 1919 #else 1920 #if MSDOS_COMPILER==WIN32C 1921 curr_console_input_mode = base_console_input_mode; 1922 SetConsoleMode(tty, curr_console_input_mode); 1923 #endif 1924 #endif 1925 } 1926 1927 /* 1928 * Suspend screen updates. 1929 */ 1930 public void suspend_screen(void) 1931 { 1932 #if !MSDOS_COMPILER 1933 ltputs(sc_suspend, 1, putchr); 1934 #endif 1935 } 1936 1937 /* 1938 * Resume screen updates. 1939 */ 1940 public void resume_screen(void) 1941 { 1942 #if !MSDOS_COMPILER 1943 ltputs(sc_resume, 1, putchr); 1944 #endif 1945 } 1946 1947 /* 1948 * Initialize terminal 1949 */ 1950 public void term_init(void) 1951 { 1952 if (term_init_done) 1953 return; 1954 term_init_done = term_init_ever = TRUE; 1955 clear_bot_if_needed(); 1956 #if !MSDOS_COMPILER 1957 if (!(quit_if_one_screen && one_screen)) 1958 { 1959 if (!no_init) 1960 { 1961 ltputs(sc_init, sc_height, putchr); 1962 /* 1963 * Some terminals leave the cursor unmoved when switching 1964 * to the alt screen. To avoid having the text appear at 1965 * a seemingly random line on the alt screen, move to 1966 * lower left if we are using an alt screen. 1967 */ 1968 if (*sc_init != '\0' && *sc_deinit != '\0' && !no_alt_screen) 1969 lower_left(); 1970 term_addrs = TRUE; 1971 } 1972 if (!no_keypad) 1973 ltputs(sc_s_keypad, sc_height, putchr); 1974 if (mousecap) 1975 init_mouse(); 1976 if (no_paste) 1977 init_bracketed_paste(); 1978 } 1979 if (top_scroll) 1980 { 1981 int i; 1982 1983 /* 1984 * This is nice to terminals with no alternate screen, 1985 * but with saved scrolled-off-the-top lines. This way, 1986 * no previous line is lost, but we start with a whole 1987 * screen to ourself. 1988 */ 1989 for (i = 1; i < sc_height; i++) 1990 putchr('\n'); 1991 } else 1992 line_left(); 1993 #else 1994 #if MSDOS_COMPILER==WIN32C 1995 if (!(quit_if_one_screen && one_screen)) 1996 { 1997 if (!no_init) 1998 { 1999 win32_init_term(); 2000 term_addrs = TRUE; 2001 } 2002 if (mousecap) 2003 init_mouse(); 2004 2005 } 2006 win32_init_vt_term(); 2007 #endif 2008 initcolor(); 2009 flush(); 2010 #endif 2011 } 2012 2013 /* 2014 * Deinitialize terminal 2015 */ 2016 public void term_deinit(void) 2017 { 2018 if (!term_init_done) 2019 return; 2020 #if !MSDOS_COMPILER 2021 if (!(quit_if_one_screen && one_screen)) 2022 { 2023 if (mousecap) 2024 deinit_mouse(); 2025 if (no_paste) 2026 deinit_bracketed_paste(); 2027 if (!no_keypad) 2028 ltputs(sc_e_keypad, sc_height, putchr); 2029 if (!no_init) 2030 ltputs(sc_deinit, sc_height, putchr); 2031 } 2032 #else 2033 /* Restore system colors. */ 2034 SETCOLORS(sy_fg_color, sy_bg_color); 2035 #if MSDOS_COMPILER==WIN32C 2036 win32_deinit_vt_term(); 2037 if (!(quit_if_one_screen && one_screen)) 2038 { 2039 if (mousecap) 2040 deinit_mouse(); 2041 if (!no_init) 2042 win32_deinit_term(); 2043 } 2044 #else 2045 /* Need clreol to make SETCOLORS take effect. */ 2046 clreol(); 2047 #endif 2048 #endif 2049 term_init_done = FALSE; 2050 } 2051 2052 /* 2053 * Are we interactive (ie. writing to an initialized tty)? 2054 */ 2055 public lbool interactive(void) 2056 { 2057 return (is_tty && term_init_done); 2058 } 2059 2060 static void assert_interactive(void) 2061 { 2062 } 2063 2064 /* 2065 * Home cursor (move to upper left corner of screen). 2066 */ 2067 public void home(void) 2068 { 2069 assert_interactive(); 2070 #if !MSDOS_COMPILER 2071 ltputs(sc_home, 1, putchr); 2072 #else 2073 flush(); 2074 _settextposition(1,1); 2075 #endif 2076 } 2077 2078 #if LESSTEST 2079 public void dump_screen(void) 2080 { 2081 char dump_cmd[32]; 2082 SNPRINTF1(dump_cmd, sizeof(dump_cmd), ESCS"0;0;%dR", sc_width * sc_height); 2083 ltputs(dump_cmd, sc_height, putchr); 2084 flush(); 2085 } 2086 #endif /*LESSTEST*/ 2087 2088 /* 2089 * Add a blank line (called with cursor at home). 2090 * Should scroll the display down. 2091 */ 2092 public void add_line(void) 2093 { 2094 assert_interactive(); 2095 #if !MSDOS_COMPILER 2096 ltputs(sc_addline, sc_height, putchr); 2097 #else 2098 flush(); 2099 #if MSDOS_COMPILER==MSOFTC 2100 _scrolltextwindow(_GSCROLLDOWN); 2101 _settextposition(1,1); 2102 #else 2103 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 2104 movetext(1,1, sc_width,sc_height-1, 1,2); 2105 gotoxy(1,1); 2106 clreol(); 2107 #else 2108 #if MSDOS_COMPILER==WIN32C 2109 { 2110 CHAR_INFO fillchar; 2111 SMALL_RECT rcSrc, rcClip; 2112 COORD new_org; 2113 CONSOLE_SCREEN_BUFFER_INFO csbi; 2114 2115 GetConsoleScreenBufferInfo(con_out,&csbi); 2116 2117 /* The clip rectangle is the entire visible screen. */ 2118 rcClip.Left = csbi.srWindow.Left; 2119 rcClip.Top = csbi.srWindow.Top; 2120 rcClip.Right = csbi.srWindow.Right; 2121 rcClip.Bottom = csbi.srWindow.Bottom; 2122 2123 /* The source rectangle is the visible screen minus the last line. */ 2124 rcSrc = rcClip; 2125 rcSrc.Bottom--; 2126 2127 /* Move the top left corner of the source window down one row. */ 2128 new_org.X = rcSrc.Left; 2129 new_org.Y = rcSrc.Top + 1; 2130 2131 /* Fill the right character and attributes. */ 2132 fillchar.Char.AsciiChar = ' '; 2133 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 2134 fillchar.Attributes = curr_attr; 2135 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); 2136 _settextposition(1,1); 2137 } 2138 #endif 2139 #endif 2140 #endif 2141 #endif 2142 } 2143 2144 #if 0 2145 /* 2146 * Remove the n topmost lines and scroll everything below it in the 2147 * window upward. This is needed to stop leaking the topmost line 2148 * into the scrollback buffer when we go down-one-line (in WIN32). 2149 */ 2150 public void remove_top(int n) 2151 { 2152 #if MSDOS_COMPILER==WIN32C 2153 SMALL_RECT rcSrc, rcClip; 2154 CHAR_INFO fillchar; 2155 COORD new_org; 2156 CONSOLE_SCREEN_BUFFER_INFO csbi; /* to get buffer info */ 2157 2158 if (n >= sc_height - 1) 2159 { 2160 lclear(); 2161 home(); 2162 return; 2163 } 2164 2165 flush(); 2166 2167 GetConsoleScreenBufferInfo(con_out, &csbi); 2168 2169 /* Get the extent of all-visible-rows-but-the-last. */ 2170 rcSrc.Left = csbi.srWindow.Left; 2171 rcSrc.Top = csbi.srWindow.Top + n; 2172 rcSrc.Right = csbi.srWindow.Right; 2173 rcSrc.Bottom = csbi.srWindow.Bottom; 2174 2175 /* Get the clip rectangle. */ 2176 rcClip.Left = rcSrc.Left; 2177 rcClip.Top = csbi.srWindow.Top; 2178 rcClip.Right = rcSrc.Right; 2179 rcClip.Bottom = rcSrc.Bottom ; 2180 2181 /* Move the source window up n rows. */ 2182 new_org.X = rcSrc.Left; 2183 new_org.Y = rcSrc.Top - n; 2184 2185 /* Fill the right character and attributes. */ 2186 fillchar.Char.AsciiChar = ' '; 2187 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 2188 fillchar.Attributes = curr_attr; 2189 2190 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); 2191 2192 /* Position cursor on first blank line. */ 2193 goto_line(sc_height - n - 1); 2194 #endif 2195 } 2196 #endif 2197 2198 #if MSDOS_COMPILER==WIN32C 2199 /* 2200 * Clear the screen. 2201 */ 2202 static void win32_clear(void) 2203 { 2204 /* 2205 * This will clear only the currently visible rows of the NT 2206 * console buffer, which means none of the precious scrollback 2207 * rows are touched making for faster scrolling. Note that, if 2208 * the window has fewer columns than the console buffer (i.e. 2209 * there is a horizontal scrollbar as well), the entire width 2210 * of the visible rows will be cleared. 2211 */ 2212 COORD topleft; 2213 DWORD nchars; 2214 DWORD winsz; 2215 CONSOLE_SCREEN_BUFFER_INFO csbi; 2216 2217 /* get the number of cells in the current buffer */ 2218 GetConsoleScreenBufferInfo(con_out, &csbi); 2219 winsz = csbi.dwSize.X * (csbi.srWindow.Bottom - csbi.srWindow.Top + 1); 2220 topleft.X = 0; 2221 topleft.Y = csbi.srWindow.Top; 2222 2223 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 2224 FillConsoleOutputCharacter(con_out, ' ', winsz, topleft, &nchars); 2225 FillConsoleOutputAttribute(con_out, curr_attr, winsz, topleft, &nchars); 2226 } 2227 2228 /* 2229 * Remove the n topmost lines and scroll everything below it in the 2230 * window upward. 2231 */ 2232 public void win32_scroll_up(int n) 2233 { 2234 SMALL_RECT rcSrc, rcClip; 2235 CHAR_INFO fillchar; 2236 COORD topleft; 2237 COORD new_org; 2238 DWORD nchars; 2239 DWORD size; 2240 CONSOLE_SCREEN_BUFFER_INFO csbi; 2241 2242 if (n <= 0) 2243 return; 2244 2245 if (n >= sc_height - 1) 2246 { 2247 win32_clear(); 2248 _settextposition(1,1); 2249 return; 2250 } 2251 2252 /* Get the extent of what will remain visible after scrolling. */ 2253 GetConsoleScreenBufferInfo(con_out, &csbi); 2254 rcSrc.Left = csbi.srWindow.Left; 2255 rcSrc.Top = csbi.srWindow.Top + n; 2256 rcSrc.Right = csbi.srWindow.Right; 2257 rcSrc.Bottom = csbi.srWindow.Bottom; 2258 2259 /* Get the clip rectangle. */ 2260 rcClip.Left = rcSrc.Left; 2261 rcClip.Top = csbi.srWindow.Top; 2262 rcClip.Right = rcSrc.Right; 2263 rcClip.Bottom = rcSrc.Bottom ; 2264 2265 /* Move the source text to the top of the screen. */ 2266 new_org.X = rcSrc.Left; 2267 new_org.Y = rcClip.Top; 2268 2269 /* Fill the right character and attributes. */ 2270 fillchar.Char.AsciiChar = ' '; 2271 fillchar.Attributes = MAKEATTR(nm_fg_color, nm_bg_color); 2272 2273 /* Scroll the window. */ 2274 SetConsoleTextAttribute(con_out, fillchar.Attributes); 2275 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); 2276 2277 /* Clear remaining lines at bottom. */ 2278 topleft.X = csbi.dwCursorPosition.X; 2279 topleft.Y = rcSrc.Bottom - n; 2280 size = (n * csbi.dwSize.X) + (rcSrc.Right - topleft.X); 2281 FillConsoleOutputCharacter(con_out, ' ', size, topleft, 2282 &nchars); 2283 FillConsoleOutputAttribute(con_out, fillchar.Attributes, size, topleft, 2284 &nchars); 2285 SetConsoleTextAttribute(con_out, curr_attr); 2286 2287 /* Move cursor n lines up from where it was. */ 2288 csbi.dwCursorPosition.Y -= n; 2289 SetConsoleCursorPosition(con_out, csbi.dwCursorPosition); 2290 } 2291 #endif 2292 2293 /* 2294 * Move cursor to lower left corner of screen. 2295 */ 2296 public void lower_left(void) 2297 { 2298 assert_interactive(); 2299 #if !MSDOS_COMPILER 2300 ltputs(sc_lower_left, 1, putchr); 2301 #else 2302 flush(); 2303 _settextposition(sc_height, 1); 2304 #endif 2305 } 2306 2307 /* 2308 * Move cursor to left position of current line. 2309 */ 2310 public void line_left(void) 2311 { 2312 assert_interactive(); 2313 #if !MSDOS_COMPILER 2314 ltputs(sc_return, 1, putchr); 2315 #else 2316 { 2317 int row; 2318 flush(); 2319 #if MSDOS_COMPILER==WIN32C 2320 { 2321 CONSOLE_SCREEN_BUFFER_INFO scr; 2322 GetConsoleScreenBufferInfo(con_out, &scr); 2323 row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1; 2324 } 2325 #else 2326 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 2327 row = wherey(); 2328 #else 2329 { 2330 struct rccoord tpos = _gettextposition(); 2331 row = tpos.row; 2332 } 2333 #endif 2334 #endif 2335 _settextposition(row, 1); 2336 } 2337 #endif 2338 } 2339 2340 /* 2341 * Check if the console size has changed and reset internals 2342 * (in lieu of SIGWINCH for WIN32). 2343 */ 2344 public void check_winch(void) 2345 { 2346 #if MSDOS_COMPILER==WIN32C 2347 CONSOLE_SCREEN_BUFFER_INFO scr; 2348 COORD size; 2349 2350 if (con_out == INVALID_HANDLE_VALUE) 2351 return; 2352 2353 flush(); 2354 GetConsoleScreenBufferInfo(con_out, &scr); 2355 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1; 2356 size.X = scr.srWindow.Right - scr.srWindow.Left + 1; 2357 if (size.Y != sc_height || size.X != sc_width) 2358 { 2359 sc_height = size.Y; 2360 sc_width = size.X; 2361 if (!no_init && con_out_ours == con_out) 2362 SetConsoleScreenBufferSize(con_out, size); 2363 pos_init(); 2364 screen_size_changed(); 2365 screen_trashed(); 2366 } 2367 #endif 2368 } 2369 2370 /* 2371 * Goto a specific line on the screen. 2372 */ 2373 public void goto_line(int sindex) 2374 { 2375 assert_interactive(); 2376 #if !MSDOS_COMPILER 2377 ltputs(ltgoto(sc_move, 0, sindex), 1, putchr); 2378 #else 2379 flush(); 2380 _settextposition(sindex+1, 1); 2381 #endif 2382 } 2383 2384 #if MSDOS_COMPILER==MSOFTC || MSDOS_COMPILER==BORLANDC 2385 /* 2386 * Create an alternate screen which is all white. 2387 * This screen is used to create a "flash" effect, by displaying it 2388 * briefly and then switching back to the normal screen. 2389 * {{ Yuck! There must be a better way to get a visual bell. }} 2390 */ 2391 static void create_flash(void) 2392 { 2393 #if MSDOS_COMPILER==MSOFTC 2394 struct videoconfig w; 2395 char *blanks; 2396 int row, col; 2397 2398 _getvideoconfig(&w); 2399 videopages = w.numvideopages; 2400 if (videopages < 2) 2401 { 2402 at_enter(AT_STANDOUT); 2403 at_exit(); 2404 } else 2405 { 2406 _setactivepage(1); 2407 at_enter(AT_STANDOUT); 2408 blanks = (char *) ecalloc(w.numtextcols, sizeof(char)); 2409 for (col = 0; col < w.numtextcols; col++) 2410 blanks[col] = ' '; 2411 for (row = w.numtextrows; row > 0; row--) 2412 _outmem(blanks, w.numtextcols); 2413 _setactivepage(0); 2414 _setvisualpage(0); 2415 free(blanks); 2416 at_exit(); 2417 } 2418 #else 2419 #if MSDOS_COMPILER==BORLANDC 2420 int n; 2421 2422 whitescreen = (unsigned short *) 2423 malloc(sc_width * sc_height * sizeof(short)); 2424 if (whitescreen == NULL) 2425 return; 2426 for (n = 0; n < sc_width * sc_height; n++) 2427 whitescreen[n] = 0x7020; 2428 #endif 2429 #endif 2430 flash_created = 1; 2431 } 2432 #endif /* MSDOS_COMPILER */ 2433 2434 /* 2435 * Output the "visual bell", if there is one. 2436 */ 2437 public void vbell(void) 2438 { 2439 if (no_vbell) 2440 return; 2441 #if !MSDOS_COMPILER 2442 if (*sc_visual_bell == '\0') 2443 return; 2444 ltputs(sc_visual_bell, sc_height, putchr); 2445 #else 2446 #if MSDOS_COMPILER==DJGPPC 2447 ScreenVisualBell(); 2448 #else 2449 #if MSDOS_COMPILER==MSOFTC 2450 /* 2451 * Create a flash screen on the second video page. 2452 * Switch to that page, then switch back. 2453 */ 2454 if (!flash_created) 2455 create_flash(); 2456 if (videopages < 2) 2457 return; 2458 _setvisualpage(1); 2459 delay(100); 2460 _setvisualpage(0); 2461 #else 2462 #if MSDOS_COMPILER==BORLANDC 2463 unsigned short *currscreen; 2464 2465 /* 2466 * Get a copy of the current screen. 2467 * Display the flash screen. 2468 * Then restore the old screen. 2469 */ 2470 if (!flash_created) 2471 create_flash(); 2472 if (whitescreen == NULL) 2473 return; 2474 currscreen = (unsigned short *) 2475 malloc(sc_width * sc_height * sizeof(short)); 2476 if (currscreen == NULL) return; 2477 gettext(1, 1, sc_width, sc_height, currscreen); 2478 puttext(1, 1, sc_width, sc_height, whitescreen); 2479 delay(100); 2480 puttext(1, 1, sc_width, sc_height, currscreen); 2481 free(currscreen); 2482 #else 2483 #if MSDOS_COMPILER==WIN32C 2484 /* paint screen with an inverse color */ 2485 lclear(); 2486 2487 /* leave it displayed for 100 msec. */ 2488 Sleep(100); 2489 2490 /* restore with a redraw */ 2491 repaint(); 2492 #endif 2493 #endif 2494 #endif 2495 #endif 2496 #endif 2497 } 2498 2499 /* 2500 * Make a noise. 2501 */ 2502 static void lbeep(void) 2503 { 2504 #if !MSDOS_COMPILER 2505 putchr(CONTROL('G')); 2506 #else 2507 #if MSDOS_COMPILER==WIN32C 2508 MessageBeep(0); 2509 #else 2510 write(1, "\7", 1); 2511 #endif 2512 #endif 2513 } 2514 2515 /* 2516 * Ring the terminal bell. 2517 */ 2518 public void lbell(void) 2519 { 2520 if (quiet == VERY_QUIET) 2521 vbell(); 2522 else 2523 lbeep(); 2524 } 2525 2526 /* 2527 * Clear the screen. 2528 */ 2529 public void lclear(void) 2530 { 2531 assert_interactive(); 2532 suspend_screen(); 2533 #if !MSDOS_COMPILER 2534 ltputs(sc_clear, sc_height, putchr); 2535 #else 2536 flush(); 2537 #if MSDOS_COMPILER==WIN32C 2538 win32_clear(); 2539 #else 2540 _clearscreen(_GCLEARSCREEN); 2541 #endif 2542 #endif 2543 } 2544 2545 /* 2546 * Clear from the cursor to the end of the cursor's line. 2547 * {{ This must not move the cursor. }} 2548 */ 2549 public void clear_eol(void) 2550 { 2551 /* assert_interactive();*/ 2552 #if !MSDOS_COMPILER 2553 ltputs(sc_eol_clear, 1, putchr); 2554 #else 2555 #if MSDOS_COMPILER==MSOFTC 2556 short top, left; 2557 short bot, right; 2558 struct rccoord tpos; 2559 2560 flush(); 2561 /* 2562 * Save current state. 2563 */ 2564 tpos = _gettextposition(); 2565 _gettextwindow(&top, &left, &bot, &right); 2566 /* 2567 * Set a temporary window to the current line, 2568 * from the cursor's position to the right edge of the screen. 2569 * Then clear that window. 2570 */ 2571 _settextwindow(tpos.row, tpos.col, tpos.row, sc_width); 2572 _clearscreen(_GWINDOW); 2573 /* 2574 * Restore state. 2575 */ 2576 _settextwindow(top, left, bot, right); 2577 _settextposition(tpos.row, tpos.col); 2578 #else 2579 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 2580 flush(); 2581 clreol(); 2582 #else 2583 #if MSDOS_COMPILER==WIN32C 2584 DWORD nchars; 2585 COORD cpos; 2586 CONSOLE_SCREEN_BUFFER_INFO scr; 2587 2588 flush(); 2589 memset(&scr, 0, sizeof(scr)); 2590 GetConsoleScreenBufferInfo(con_out, &scr); 2591 cpos.X = scr.dwCursorPosition.X; 2592 cpos.Y = scr.dwCursorPosition.Y; 2593 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 2594 FillConsoleOutputAttribute(con_out, curr_attr, 2595 scr.dwSize.X - cpos.X, cpos, &nchars); 2596 FillConsoleOutputCharacter(con_out, ' ', 2597 scr.dwSize.X - cpos.X, cpos, &nchars); 2598 #endif 2599 #endif 2600 #endif 2601 #endif 2602 } 2603 2604 /* 2605 * Clear the current line. 2606 * Clear the screen if there's off-screen memory below the display. 2607 */ 2608 static void clear_eol_bot(void) 2609 { 2610 assert_interactive(); 2611 #if MSDOS_COMPILER 2612 clear_eol(); 2613 #else 2614 if (below_mem) 2615 ltputs(sc_eos_clear, 1, putchr); 2616 else 2617 ltputs(sc_eol_clear, 1, putchr); 2618 #endif 2619 } 2620 2621 /* 2622 * Clear the bottom line of the display. 2623 * Leave the cursor at the beginning of the bottom line. 2624 */ 2625 public void clear_bot(void) 2626 { 2627 /* 2628 * If we're in a non-normal attribute mode, temporarily exit 2629 * the mode while we do the clear. Some terminals fill the 2630 * cleared area with the current attribute. 2631 */ 2632 if (oldbot) 2633 lower_left(); 2634 else 2635 line_left(); 2636 2637 if (attrmode == AT_NORMAL) 2638 clear_eol_bot(); 2639 else 2640 { 2641 int saved_attrmode = attrmode; 2642 2643 at_exit(); 2644 clear_eol_bot(); 2645 at_enter(saved_attrmode); 2646 } 2647 } 2648 2649 /* 2650 * Enable or disable bracketed paste mode. 2651 * When enabled, the terminal sends an "open bracket" sequence 2652 * before pasted content and "close bracket" after it. 2653 */ 2654 public void init_bracketed_paste(void) 2655 { 2656 #if !MSDOS_COMPILER 2657 ltputs(sc_s_bracketed_paste, 1, putchr); 2658 #endif 2659 } 2660 2661 public void deinit_bracketed_paste(void) 2662 { 2663 #if !MSDOS_COMPILER 2664 ltputs(sc_e_bracketed_paste, 1, putchr); 2665 #endif 2666 } 2667 2668 /* 2669 * Color string may be "x[y]" where x and y are 4-bit color chars, 2670 * or "N[.M]" where N and M are decimal integers> 2671 * Any of x,y,N,M may also be "-" to mean "unchanged". 2672 */ 2673 2674 /* 2675 * Parse a 4-bit color char. 2676 */ 2677 static int parse_color4(char ch) 2678 { 2679 switch (ch) 2680 { 2681 case 'k': return 0; 2682 case 'r': return CV_RED; 2683 case 'g': return CV_GREEN; 2684 case 'y': return CV_RED|CV_GREEN; 2685 case 'b': return CV_BLUE; 2686 case 'm': return CV_RED|CV_BLUE; 2687 case 'c': return CV_GREEN|CV_BLUE; 2688 case 'w': return CV_RED|CV_GREEN|CV_BLUE; 2689 case 'K': return 0|CV_BRIGHT; 2690 case 'R': return CV_RED|CV_BRIGHT; 2691 case 'G': return CV_GREEN|CV_BRIGHT; 2692 case 'Y': return CV_RED|CV_GREEN|CV_BRIGHT; 2693 case 'B': return CV_BLUE|CV_BRIGHT; 2694 case 'M': return CV_RED|CV_BLUE|CV_BRIGHT; 2695 case 'C': return CV_GREEN|CV_BLUE|CV_BRIGHT; 2696 case 'W': return CV_RED|CV_GREEN|CV_BLUE|CV_BRIGHT; 2697 case '-': return CV_NOCHANGE; 2698 default: return CV_ERROR; 2699 } 2700 } 2701 2702 /* 2703 * Parse a color as a decimal integer. 2704 */ 2705 static int parse_color6(constant char **ps) 2706 { 2707 if (**ps == '-') 2708 { 2709 (*ps)++; 2710 return CV_NOCHANGE; 2711 } else 2712 { 2713 constant char *os = *ps; 2714 int color = lstrtoic(os, ps, 10); 2715 if (color < 0 || *ps == os) 2716 return CV_ERROR; 2717 return color; 2718 } 2719 } 2720 2721 /* 2722 * Parse a color pair and return the foreground/background/attribute values. 2723 * Return type of color specifier: 2724 * CV_4BIT: fg/bg values are OR of CV_{RGB} bits. 2725 * CV_6BIT: fg/bg values are integers entered by user. 2726 */ 2727 public COLOR_TYPE parse_color(constant char *str, mutable int *p_fg, mutable int *p_bg, mutable CHAR_ATTR *p_cattr) 2728 { 2729 int fg; 2730 int bg = CV_ERROR; 2731 CHAR_ATTR cattr = CATTR_NULL; 2732 COLOR_TYPE type = CT_NULL; 2733 2734 if (str == NULL || *str == '\0') 2735 return CT_NULL; 2736 if (*str == '+') 2737 str++; /* ignore leading + */ 2738 2739 fg = parse_color4(*str); 2740 if (fg != CV_ERROR) 2741 { 2742 if (str[1] == '\0' || strchr("*~_&dsul", str[1]) != NULL) 2743 { 2744 bg = CV_NOCHANGE; 2745 str++; /* skip the fg char */ 2746 } else 2747 { 2748 bg = parse_color4(str[1]); 2749 if (bg != CV_ERROR) 2750 str += 2; /* skip both fg and bg chars */ 2751 } 2752 } 2753 if (fg != CV_ERROR && bg != CV_ERROR) 2754 type = CT_4BIT; 2755 else 2756 { 2757 fg = (*str == '.') ? CV_NOCHANGE : parse_color6(&str); 2758 if (fg != CV_ERROR) 2759 { 2760 if (*str != '.') 2761 bg = CV_NOCHANGE; 2762 else 2763 { 2764 str++; /* skip the dot */ 2765 bg = parse_color6(&str); 2766 } 2767 } 2768 if (fg != CV_ERROR && bg != CV_ERROR) 2769 type = CT_6BIT; 2770 } 2771 if (type != CT_NULL) 2772 { 2773 for (;; str++) 2774 { 2775 if (*str == '*' || *str == 'd') 2776 cattr |= CATTR_BOLD; 2777 else if (*str == '~' || *str == 's') 2778 cattr |= CATTR_STANDOUT; 2779 else if (*str == '_' || *str == 'u') 2780 cattr |= CATTR_UNDERLINE; 2781 else if (*str == '&' || *str == 'l') /* can't use 'k' because of conflict with "black" */ 2782 cattr |= CATTR_BLINK; 2783 else 2784 break; 2785 } 2786 if (p_fg != NULL) *p_fg = fg; 2787 if (p_bg != NULL) *p_bg = bg; 2788 if (p_cattr != NULL) *p_cattr = cattr; 2789 } 2790 return type; 2791 } 2792 2793 #if !MSDOS_COMPILER 2794 2795 static int sgr_color(int color) 2796 { 2797 switch (color) 2798 { 2799 case 0: return 30; 2800 case CV_RED: return 31; 2801 case CV_GREEN: return 32; 2802 case CV_RED|CV_GREEN: return 33; 2803 case CV_BLUE: return 34; 2804 case CV_RED|CV_BLUE: return 35; 2805 case CV_GREEN|CV_BLUE: return 36; 2806 case CV_RED|CV_GREEN|CV_BLUE: return 37; 2807 2808 case CV_BRIGHT: return 90; 2809 case CV_RED|CV_BRIGHT: return 91; 2810 case CV_GREEN|CV_BRIGHT: return 92; 2811 case CV_RED|CV_GREEN|CV_BRIGHT: return 93; 2812 case CV_BLUE|CV_BRIGHT: return 94; 2813 case CV_RED|CV_BLUE|CV_BRIGHT: return 95; 2814 case CV_GREEN|CV_BLUE|CV_BRIGHT: return 96; 2815 case CV_RED|CV_GREEN|CV_BLUE|CV_BRIGHT: return 97; 2816 2817 default: return color; 2818 } 2819 } 2820 2821 static void tput_fmt(constant char *fmt, int color, int (*f_putc)(int)) 2822 { 2823 char buf[INT_STRLEN_BOUND(int)+16]; 2824 if (color == attrcolor) 2825 return; 2826 SNPRINTF1(buf, sizeof(buf), fmt, color); 2827 ltputs(buf, 1, f_putc); 2828 attrcolor = color; 2829 } 2830 2831 static void tput_char_cattr(CHAR_ATTR cattr, int (*f_putc)(int)) 2832 { 2833 if (cattr & CATTR_UNDERLINE) 2834 ltputs(sc_u_in, 1, f_putc); 2835 if (cattr & CATTR_BOLD) 2836 ltputs(sc_b_in, 1, f_putc); 2837 if (cattr & CATTR_BLINK) 2838 ltputs(sc_bl_in, 1, f_putc); 2839 if (cattr & CATTR_STANDOUT) 2840 ltputs(sc_s_in, 1, f_putc); 2841 } 2842 2843 static void tput_color(constant char *str, int (*f_putc)(int)) 2844 { 2845 int fg; 2846 int bg; 2847 CHAR_ATTR cattr; 2848 2849 if (str != NULL && strcmp(str, "*") == 0) 2850 { 2851 /* Special case: reset to normal */ 2852 tput_fmt(ESCS"[m", -1, f_putc); 2853 return; 2854 } 2855 switch (parse_color(str, &fg, &bg, &cattr)) 2856 { 2857 case CT_4BIT: 2858 if (fg >= 0) 2859 tput_fmt(ESCS"[%dm", sgr_color(fg), f_putc); 2860 if (bg >= 0) 2861 tput_fmt(ESCS"[%dm", sgr_color(bg)+10, f_putc); 2862 tput_char_cattr(cattr, f_putc); 2863 break; 2864 case CT_6BIT: 2865 if (fg >= 0) 2866 tput_fmt(ESCS"[38;5;%dm", fg, f_putc); 2867 if (bg >= 0) 2868 tput_fmt(ESCS"[48;5;%dm", bg, f_putc); 2869 tput_char_cattr(cattr, f_putc); 2870 break; 2871 default: 2872 break; 2873 } 2874 } 2875 2876 static void tput_inmode(constant char *mode_str, int attr, int attr_bit, int (*f_putc)(int)) 2877 { 2878 constant char *color_str; 2879 if ((attr & attr_bit) == 0) 2880 return; 2881 color_str = get_color_map(attr_bit); 2882 if (color_str == NULL || *color_str == '\0' || *color_str == '+') 2883 { 2884 ltputs(mode_str, 1, f_putc); 2885 if (color_str == NULL || *color_str++ != '+') 2886 return; 2887 } 2888 /* Color overrides mode string */ 2889 tput_color(color_str, f_putc); 2890 } 2891 2892 static void tput_outmode(constant char *mode_str, int attr_bit, int (*f_putc)(int)) 2893 { 2894 if ((attrmode & attr_bit) == 0) 2895 return; 2896 ltputs(mode_str, 1, f_putc); 2897 } 2898 2899 #else /* MSDOS_COMPILER */ 2900 2901 #if MSDOS_COMPILER==WIN32C 2902 static lbool WIN32put_fmt(constant char *fmt, int color) 2903 { 2904 char buf[INT_STRLEN_BOUND(int)+16]; 2905 int len = (size_t) SNPRINTF1(buf, sizeof(buf), fmt, color); 2906 if (len > 0) 2907 WIN32textout(buf, (size_t) len); 2908 return TRUE; 2909 } 2910 2911 static void win_set_cattr(CHAR_ATTR cattr) 2912 { 2913 if (cattr & CATTR_UNDERLINE) 2914 WIN32textout(ESCS"[4m", 4); 2915 if (cattr & CATTR_BOLD) 2916 WIN32textout(ESCS"[1m", 4); 2917 if (cattr & CATTR_BLINK) 2918 WIN32textout(ESCS"[5m", 4); 2919 if (cattr & CATTR_STANDOUT) 2920 WIN32textout(ESCS"[7m", 4); 2921 } 2922 #endif 2923 2924 static lbool win_set_color(int attr) 2925 { 2926 int fg; 2927 int bg; 2928 CHAR_ATTR cattr; 2929 lbool out = FALSE; 2930 constant char *str = get_color_map(attr); 2931 if (str == NULL || str[0] == '\0') 2932 return FALSE; 2933 switch (parse_color(str, &fg, &bg, &cattr)) 2934 { 2935 case CT_4BIT: 2936 if (fg >= 0 && bg >= 0) 2937 { 2938 SETCOLORS(fg, bg); 2939 out = TRUE; 2940 } else if (fg >= 0) 2941 { 2942 SET_FG_COLOR(fg); 2943 out = TRUE; 2944 } else if (bg >= 0) 2945 { 2946 SET_BG_COLOR(bg); 2947 out = TRUE; 2948 } 2949 #if MSDOS_COMPILER==WIN32C 2950 if (vt_enabled) 2951 win_set_cattr(cattr); 2952 #endif 2953 break; 2954 #if MSDOS_COMPILER==WIN32C 2955 case CT_6BIT: 2956 if (vt_enabled) 2957 { 2958 if (fg > 0) 2959 out = WIN32put_fmt(ESCS"[38;5;%dm", fg); 2960 if (bg > 0) 2961 out = WIN32put_fmt(ESCS"[48;5;%dm", bg); 2962 win_set_cattr(cattr); 2963 } 2964 break; 2965 #endif 2966 default: 2967 break; 2968 } 2969 return out; 2970 } 2971 2972 #endif /* MSDOS_COMPILER */ 2973 2974 public void at_enter(int attr) 2975 { 2976 attr = apply_at_specials(attr); 2977 #if !MSDOS_COMPILER 2978 /* The one with the most priority is last. */ 2979 tput_inmode(sc_u_in, attr, AT_UNDERLINE, putchr); 2980 tput_inmode(sc_b_in, attr, AT_BOLD, putchr); 2981 tput_inmode(sc_bl_in, attr, AT_BLINK, putchr); 2982 /* Don't use standout and color at the same time. */ 2983 if (use_color && (attr & AT_COLOR)) 2984 tput_color(get_color_map(attr), putchr); 2985 else 2986 tput_inmode(sc_s_in, attr, AT_STANDOUT, putchr); 2987 #else 2988 flush(); 2989 /* The one with the most priority is first. */ 2990 if ((attr & AT_COLOR) && use_color) 2991 { 2992 win_set_color(attr); 2993 } else if (attr & AT_STANDOUT) 2994 { 2995 SETCOLORS(so_fg_color, so_bg_color); 2996 } else if (attr & AT_BLINK) 2997 { 2998 SETCOLORS(bl_fg_color, bl_bg_color); 2999 } else if (attr & AT_BOLD) 3000 { 3001 SETCOLORS(bo_fg_color, bo_bg_color); 3002 } else if (attr & AT_UNDERLINE) 3003 { 3004 SETCOLORS(ul_fg_color, ul_bg_color); 3005 } 3006 #endif 3007 attrmode = attr; 3008 } 3009 3010 public void at_exit(void) 3011 { 3012 #if !MSDOS_COMPILER 3013 /* Undo things in the reverse order we did them. */ 3014 tput_color("*", putchr); 3015 tput_outmode(sc_s_out, AT_STANDOUT, putchr); 3016 tput_outmode(sc_bl_out, AT_BLINK, putchr); 3017 tput_outmode(sc_b_out, AT_BOLD, putchr); 3018 tput_outmode(sc_u_out, AT_UNDERLINE, putchr); 3019 #else 3020 flush(); 3021 SETCOLORS(nm_fg_color, nm_bg_color); 3022 #endif 3023 attrmode = AT_NORMAL; 3024 } 3025 3026 public void at_switch(int attr) 3027 { 3028 int new_attrmode = apply_at_specials(attr); 3029 int ignore_modes = AT_ANSI; 3030 3031 if ((new_attrmode & ~ignore_modes) != (attrmode & ~ignore_modes)) 3032 { 3033 at_exit(); 3034 at_enter(attr); 3035 } 3036 } 3037 3038 public lbool is_at_equiv(int attr1, int attr2) 3039 { 3040 attr1 = apply_at_specials(attr1); 3041 attr2 = apply_at_specials(attr2); 3042 3043 return (attr1 == attr2); 3044 } 3045 3046 public int apply_at_specials(int attr) 3047 { 3048 if (attr & AT_BINARY) 3049 attr |= binattr; 3050 if (attr & AT_HILITE) 3051 attr |= AT_STANDOUT; 3052 attr &= ~(AT_BINARY|AT_HILITE); 3053 3054 return attr; 3055 } 3056 3057 /* 3058 * Output a plain backspace, without erasing the previous char. 3059 */ 3060 public void putbs(void) 3061 { 3062 if (termcap_debug) 3063 putstr("<bs>"); 3064 else 3065 { 3066 #if !MSDOS_COMPILER 3067 ltputs(sc_backspace, 1, putchr); 3068 #else 3069 int row, col; 3070 3071 flush(); 3072 { 3073 #if MSDOS_COMPILER==MSOFTC 3074 struct rccoord tpos; 3075 tpos = _gettextposition(); 3076 row = tpos.row; 3077 col = tpos.col; 3078 #else 3079 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 3080 row = wherey(); 3081 col = wherex(); 3082 #else 3083 #if MSDOS_COMPILER==WIN32C 3084 CONSOLE_SCREEN_BUFFER_INFO scr; 3085 GetConsoleScreenBufferInfo(con_out, &scr); 3086 row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1; 3087 col = scr.dwCursorPosition.X - scr.srWindow.Left + 1; 3088 #endif 3089 #endif 3090 #endif 3091 } 3092 if (col <= 1) 3093 return; 3094 _settextposition(row, col-1); 3095 #endif /* MSDOS_COMPILER */ 3096 } 3097 } 3098 3099 #if MSDOS_COMPILER==WIN32C 3100 3101 #define WIN32_MAX_REPEAT 3 3102 #define LAST_DOWN_COUNT 8 3103 static LWCHAR last_downs[LAST_DOWN_COUNT] = { 0 }; 3104 static int last_down_index = 0; 3105 static LWCHAR hi_surr = 0; 3106 3107 typedef struct XINPUT_RECORD { 3108 INPUT_RECORD ir; 3109 LWCHAR ichar; /* because ir...UnicodeChar is only 16 bits */ 3110 } XINPUT_RECORD; 3111 3112 typedef struct WIN32_CHAR { 3113 struct WIN32_CHAR *wc_next; 3114 int wc_ch; 3115 } WIN32_CHAR; 3116 3117 static WIN32_CHAR *win32_queue = NULL; 3118 3119 /* 3120 * Is the win32_queue nonempty? 3121 */ 3122 static lbool win32_queued_char(void) 3123 { 3124 return (win32_queue != NULL); 3125 } 3126 3127 /* 3128 * Push a char onto the back of the win32_queue. 3129 */ 3130 static void win32_enqueue(int ch) 3131 { 3132 WIN32_CHAR *wch = (WIN32_CHAR *) ecalloc(1, sizeof(WIN32_CHAR)); 3133 wch->wc_ch = ch; 3134 wch->wc_next = NULL; 3135 if (win32_queue == NULL) 3136 win32_queue = wch; 3137 else 3138 { 3139 WIN32_CHAR *pch; 3140 for (pch = win32_queue; pch->wc_next != NULL; pch = pch->wc_next) 3141 continue; 3142 pch->wc_next = wch; 3143 } 3144 } 3145 3146 /* 3147 * Push a char onto the front of the win32_queue. 3148 * Makes the next call to WIN32getch return ch. 3149 */ 3150 public void WIN32ungetch(int ch) 3151 { 3152 WIN32_CHAR *wch = (WIN32_CHAR *) ecalloc(1, sizeof(WIN32_CHAR)); 3153 wch->wc_ch = ch; 3154 wch->wc_next = win32_queue; 3155 win32_queue = wch; 3156 } 3157 3158 /* 3159 * Get a char from the front of the win32_queue. 3160 */ 3161 static int win32_get_queue(void) 3162 { 3163 WIN32_CHAR *wch = win32_queue; 3164 int ch = wch->wc_ch; 3165 win32_queue = wch->wc_next; 3166 free(wch); 3167 return ch; 3168 } 3169 3170 /* 3171 * Handle a mouse input event. 3172 */ 3173 static lbool win32_mouse_event(XINPUT_RECORD *xip) 3174 { 3175 char b; 3176 3177 if (!mousecap || xip->ir.EventType != MOUSE_EVENT) 3178 return (FALSE); 3179 3180 /* Generate an X11 mouse sequence from the mouse event. */ 3181 /* TODO: switch to the 1006 protocol to allow specific-button-up reports */ 3182 switch (xip->ir.Event.MouseEvent.dwEventFlags) 3183 { 3184 case 0: /* press or release */ 3185 if (xip->ir.Event.MouseEvent.dwButtonState == 0) 3186 b = X11MOUSE_OFFSET + X11MOUSE_BUTTON_REL; 3187 else if (xip->ir.Event.MouseEvent.dwButtonState == 1) /* leftmost */ 3188 b = X11MOUSE_OFFSET + X11MOUSE_BUTTON1; 3189 else if (xip->ir.Event.MouseEvent.dwButtonState == 2) /* rightmost */ 3190 b = X11MOUSE_OFFSET + X11MOUSE_BUTTON3; 3191 else if (xip->ir.Event.MouseEvent.dwButtonState == 4) /* middle ("next-to-leftmost") */ 3192 b = X11MOUSE_OFFSET + X11MOUSE_BUTTON2; 3193 else /* don't bother to figure out what changed */ 3194 return (FALSE); 3195 break; 3196 case MOUSE_WHEELED: 3197 b = X11MOUSE_OFFSET + (((int)xip->ir.Event.MouseEvent.dwButtonState < 0) ? X11MOUSE_WHEEL_DOWN : X11MOUSE_WHEEL_UP); 3198 break; 3199 case MOUSE_MOVED: 3200 if (xip->ir.Event.MouseEvent.dwButtonState != 1) 3201 return (FALSE); 3202 /* Drag with left button down. */ 3203 b = X11MOUSE_OFFSET + X11MOUSE_DRAG; 3204 break; 3205 default: 3206 return (FALSE); 3207 } 3208 /* {{ TODO: change to X11 1006 format. }} */ 3209 win32_enqueue(ESC); 3210 win32_enqueue('['); 3211 win32_enqueue('M'); 3212 win32_enqueue(b); 3213 win32_enqueue(X11MOUSE_OFFSET + xip->ir.Event.MouseEvent.dwMousePosition.X + 1); 3214 win32_enqueue(X11MOUSE_OFFSET + xip->ir.Event.MouseEvent.dwMousePosition.Y + 1); 3215 return (TRUE); 3216 } 3217 3218 static void set_last_down(LWCHAR ch) 3219 { 3220 if (ch == 0) return; 3221 last_downs[last_down_index] = ch; 3222 if (++last_down_index >= LAST_DOWN_COUNT) 3223 last_down_index = 0; 3224 } 3225 3226 static LWCHAR *find_last_down(LWCHAR ch) 3227 { 3228 int i; 3229 for (i = 0; i < LAST_DOWN_COUNT; ++i) 3230 if (last_downs[i] == ch) 3231 return &last_downs[i]; 3232 return NULL; 3233 } 3234 3235 /* 3236 * Get an input char from an INPUT_RECORD and store in xip->ichar. 3237 * Handles surrogate chars, and KeyUp without previous corresponding KeyDown. 3238 */ 3239 static lbool win32_get_ichar(XINPUT_RECORD *xip) 3240 { 3241 LWCHAR ch = xip->ir.Event.KeyEvent.uChar.UnicodeChar; 3242 xip->ichar = ch; 3243 if (!is_ascii_char(ch)) 3244 { 3245 int is_down = xip->ir.Event.KeyEvent.bKeyDown; 3246 LWCHAR *last_down = find_last_down(ch); 3247 if (last_down == NULL) { /* key was up */ 3248 if (is_down) { /* key was up, now is down */ 3249 set_last_down(ch); 3250 } else { /* key up without previous down: pretend this is a down. */ 3251 xip->ir.Event.KeyEvent.bKeyDown = 1; 3252 } 3253 } else if (!is_down) { /* key was down, now is up */ 3254 *last_down = 0; /* use this last_down only once */ 3255 } 3256 3257 if (ch >= 0xD800 && ch < 0xDC00) { /* high surrogate */ 3258 hi_surr = 0x10000 + ((ch - 0xD800) << 10); 3259 return (FALSE); /* get next input, which should be the low surrogate */ 3260 } 3261 if (ch >= 0xDC00 && ch < 0xE000) { /* low surrogate */ 3262 xip->ichar = hi_surr + (ch - 0xDC00); 3263 hi_surr = 0; 3264 } 3265 } 3266 return (TRUE); 3267 } 3268 3269 /* 3270 * Handle a scan code (non-ASCII) key input. 3271 */ 3272 static lbool win32_scan_code(XINPUT_RECORD *xip) 3273 { 3274 int scan = -1; 3275 if (xip->ir.Event.KeyEvent.dwControlKeyState & (LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED)) 3276 { 3277 switch (xip->ir.Event.KeyEvent.wVirtualScanCode) 3278 { 3279 case PCK_RIGHT: /* right arrow */ 3280 scan = PCK_CTL_RIGHT; 3281 break; 3282 case PCK_LEFT: /* left arrow */ 3283 scan = PCK_CTL_LEFT; 3284 break; 3285 case PCK_DELETE: /* delete */ 3286 scan = PCK_CTL_DELETE; 3287 break; 3288 case PCK_HOME: 3289 scan = PCK_CTL_HOME; 3290 break; 3291 case PCK_END: 3292 scan = PCK_CTL_END; 3293 break; 3294 } 3295 } else if (xip->ir.Event.KeyEvent.dwControlKeyState & SHIFT_PRESSED) 3296 { 3297 if (xip->ichar == '\t') 3298 scan = PCK_SHIFT_TAB; 3299 else 3300 { 3301 switch (xip->ir.Event.KeyEvent.wVirtualScanCode) 3302 { 3303 case PCK_HOME: 3304 scan = PCK_SHIFT_HOME; 3305 break; 3306 case PCK_END: 3307 scan = PCK_SHIFT_END; 3308 break; 3309 } 3310 } 3311 } 3312 if (scan < 0 && xip->ichar == 0) 3313 scan = xip->ir.Event.KeyEvent.wVirtualScanCode; 3314 if (scan < 0) 3315 return (FALSE); 3316 /* 3317 * An extended key returns a 2 byte sequence consisting of 3318 * a zero byte followed by the scan code. 3319 */ 3320 win32_enqueue('\0'); 3321 win32_enqueue(scan); 3322 return (TRUE); 3323 } 3324 3325 /* 3326 * Handle a key input event. 3327 */ 3328 static lbool win32_key_event(XINPUT_RECORD *xip) 3329 { 3330 int repeat; 3331 char utf8[UTF8_MAX_LENGTH]; 3332 char *up; 3333 3334 if (xip->ir.EventType != KEY_EVENT || 3335 ((xip->ir.Event.KeyEvent.dwControlKeyState & (RIGHT_ALT_PRESSED|LEFT_CTRL_PRESSED)) == (RIGHT_ALT_PRESSED|LEFT_CTRL_PRESSED) && xip->ir.Event.KeyEvent.uChar.UnicodeChar == 0) || 3336 (xip->ir.Event.KeyEvent.wVirtualScanCode == 0 && xip->ir.Event.KeyEvent.uChar.UnicodeChar == 0) || 3337 xip->ir.Event.KeyEvent.wVirtualScanCode == PCK_CAPS_LOCK || 3338 xip->ir.Event.KeyEvent.wVirtualScanCode == PCK_NUM_LOCK || 3339 (xip->ir.Event.KeyEvent.wVirtualKeyCode == VK_MENU && xip->ir.Event.KeyEvent.uChar.UnicodeChar == 0) || 3340 xip->ir.Event.KeyEvent.wVirtualKeyCode == VK_KANJI || 3341 xip->ir.Event.KeyEvent.wVirtualKeyCode == VK_SHIFT || 3342 xip->ir.Event.KeyEvent.wVirtualKeyCode == VK_CONTROL) 3343 return (FALSE); 3344 3345 if (!win32_get_ichar(xip)) 3346 return (FALSE); 3347 if (!xip->ir.Event.KeyEvent.bKeyDown) 3348 return (FALSE); 3349 3350 if (win32_scan_code(xip)) 3351 return (TRUE); 3352 3353 repeat = xip->ir.Event.KeyEvent.wRepeatCount; 3354 if (repeat > WIN32_MAX_REPEAT) 3355 repeat = WIN32_MAX_REPEAT; 3356 up = utf8; 3357 put_wchar(&up, xip->ichar); 3358 for (; repeat > 0; --repeat) 3359 { 3360 constant char *p; 3361 for (p = utf8; p < up; ++p) 3362 win32_enqueue(*p & 0xFF); 3363 } 3364 return (TRUE); 3365 } 3366 3367 /* 3368 * Handle a window input event. 3369 */ 3370 static lbool win32_window_event(XINPUT_RECORD *xip) 3371 { 3372 if (xip->ir.EventType != WINDOW_BUFFER_SIZE_EVENT) 3373 return (FALSE); 3374 win32_enqueue(READ_AGAIN); 3375 return (TRUE); 3376 } 3377 3378 /* 3379 * Determine whether an input character is waiting to be read. 3380 */ 3381 public lbool win32_kbhit2(lbool no_queued) 3382 { 3383 XINPUT_RECORD xip; 3384 3385 if (!no_queued && win32_queued_char()) 3386 return (TRUE); 3387 3388 for (;;) 3389 { 3390 DWORD nread; 3391 DWORD console_input_mode; 3392 /* 3393 * When an input pipe closes, cmd may reset the console mode, 3394 * so set the mode every time we read input. 3395 */ 3396 if (GetConsoleMode(tty, &console_input_mode) && console_input_mode != curr_console_input_mode) 3397 SetConsoleMode(tty, curr_console_input_mode); 3398 PeekConsoleInputW(tty, &xip.ir, 1, &nread); 3399 if (nread == 0) 3400 return (FALSE); 3401 ReadConsoleInputW(tty, &xip.ir, 1, &nread); 3402 if (nread == 0) 3403 return (FALSE); 3404 if (win32_mouse_event(&xip) || win32_key_event(&xip) || win32_window_event(&xip)) 3405 break; 3406 } 3407 return (TRUE); 3408 } 3409 3410 public lbool win32_kbhit(void) 3411 { 3412 return win32_kbhit2(FALSE); 3413 } 3414 3415 /* 3416 * Read a character from the keyboard. 3417 */ 3418 public int WIN32getch(void) 3419 { 3420 while (!win32_kbhit()) 3421 { 3422 Sleep(20); 3423 if (ABORT_SIGS()) 3424 return ('\003'); 3425 } 3426 return (win32_get_queue()); 3427 } 3428 3429 public void win32_getch_clear(void) 3430 { 3431 while (win32_kbhit()) 3432 (void) WIN32getch(); 3433 } 3434 3435 #endif /* MSDOS_COMPILER==WIN32C */ 3436 3437 #if MSDOS_COMPILER 3438 /* 3439 */ 3440 public void WIN32setcolors(int fg, int bg) 3441 { 3442 SETCOLORS(fg, bg); 3443 } 3444 3445 /* 3446 */ 3447 public void WIN32textout(constant char *text, size_t len) 3448 { 3449 #if MSDOS_COMPILER==WIN32C 3450 DWORD written; 3451 if (utf_mode == 2) 3452 { 3453 /* 3454 * We've got UTF-8 text in a non-UTF-8 console. Convert it to 3455 * wide and use WriteConsoleW. 3456 * Biggest input len is OUTBUF_SIZE of obuf from win_flush, 3457 * which is also the biggest output count if it's ASCII. 3458 * "static" wtext is not a state - only avoid 16K on stack. 3459 */ 3460 static WCHAR wtext[OUTBUF_SIZE]; 3461 len = MultiByteToWideChar(CP_UTF8, 0, text, len, wtext, countof(wtext)); 3462 WriteConsoleW(con_out, wtext, len, &written, NULL); 3463 } else 3464 WriteConsole(con_out, text, (DWORD) len, &written, NULL); 3465 #else 3466 char buf[2048]; 3467 if (len >= sizeof(buf)) 3468 len = sizeof(buf) - 1; 3469 memcpy(buf, text, len); 3470 buf[len] = 0; 3471 cputs(buf); 3472 #endif 3473 } 3474 #endif 3475