1 /* 2 * Copyright (C) 1984-2024 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 4 140 141 static WORD curr_attr; 142 143 static HANDLE con_out_save = INVALID_HANDLE_VALUE; /* previous console */ 144 static HANDLE con_out_ours = INVALID_HANDLE_VALUE; /* our own */ 145 HANDLE con_out = INVALID_HANDLE_VALUE; /* current console */ 146 147 extern int utf_mode; 148 extern int quitting; 149 static void win32_init_term(); 150 static void win32_deinit_term(); 151 152 #ifndef ENABLE_VIRTUAL_TERMINAL_PROCESSING 153 #define ENABLE_VIRTUAL_TERMINAL_PROCESSING 4 154 #endif 155 156 #define FG_COLORS (FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_INTENSITY) 157 #define BG_COLORS (BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE | BACKGROUND_INTENSITY) 158 #define MAKEATTR(fg,bg) ((WORD)((fg)|((bg)<<4))) 159 #define APPLY_COLORS() { if (SetConsoleTextAttribute(con_out, curr_attr) == 0) \ 160 error("SETCOLORS failed", NULL_PARG); } 161 #define SET_FG_COLOR(fg) { curr_attr &= ~0x0f; curr_attr |= (fg); APPLY_COLORS(); } 162 #define SET_BG_COLOR(bg) { curr_attr &= ~0xf0; curr_attr |= ((bg)<<4); APPLY_COLORS(); } 163 #define SETCOLORS(fg,bg) { curr_attr = MAKEATTR(fg,bg); APPLY_COLORS(); } 164 #endif 165 166 #if MSDOS_COMPILER 167 public int nm_fg_color = CV_ERROR; /* Color of normal text */ 168 public int nm_bg_color = CV_ERROR; 169 public int nm_attr = 0; 170 public int bo_fg_color = CV_ERROR; /* Color of bold text */ 171 public int bo_bg_color = CV_ERROR; 172 public int bo_attr = 0; 173 public int ul_fg_color = CV_ERROR; /* Color of underlined text */ 174 public int ul_bg_color = CV_ERROR; 175 public int ul_attr = 0; 176 public int so_fg_color = CV_ERROR; /* Color of standout text */ 177 public int so_bg_color = CV_ERROR; 178 public int so_attr = 0; 179 public int bl_fg_color = CV_ERROR; /* Color of blinking text */ 180 public int bl_bg_color = CV_ERROR; 181 public int bl_attr = 0; 182 static int sy_fg_color; /* Color of system text (before less) */ 183 static int sy_bg_color; 184 public int sgr_mode; /* Honor ANSI sequences rather than using above */ 185 #if MSDOS_COMPILER==WIN32C 186 static DWORD init_console_output_mode; 187 extern DWORD init_console_input_mode; 188 extern DWORD curr_console_input_mode; 189 extern DWORD base_console_input_mode; 190 extern DWORD mouse_console_input_mode; 191 public int vt_enabled = -1; /* Is virtual terminal processing available? */ 192 #endif 193 #else 194 195 /* 196 * Strings passed to tputs() to do various terminal functions. 197 */ 198 static constant char 199 *sc_pad, /* Pad string */ 200 *sc_home, /* Cursor home */ 201 *sc_addline, /* Add line, scroll down following lines */ 202 *sc_lower_left, /* Cursor to last line, first column */ 203 *sc_return, /* Cursor to beginning of current line */ 204 *sc_move, /* General cursor positioning */ 205 *sc_clear, /* Clear screen */ 206 *sc_eol_clear, /* Clear to end of line */ 207 *sc_eos_clear, /* Clear to end of screen */ 208 *sc_s_in, /* Enter standout (highlighted) mode */ 209 *sc_s_out, /* Exit standout mode */ 210 *sc_u_in, /* Enter underline mode */ 211 *sc_u_out, /* Exit underline mode */ 212 *sc_b_in, /* Enter bold mode */ 213 *sc_b_out, /* Exit bold mode */ 214 *sc_bl_in, /* Enter blink mode */ 215 *sc_bl_out, /* Exit blink mode */ 216 *sc_visual_bell, /* Visual bell (flash screen) sequence */ 217 *sc_backspace, /* Backspace cursor */ 218 *sc_s_keypad, /* Start keypad mode */ 219 *sc_e_keypad, /* End keypad mode */ 220 *sc_s_mousecap, /* Start mouse capture mode */ 221 *sc_e_mousecap, /* End mouse capture mode */ 222 *sc_init, /* Startup terminal initialization */ 223 *sc_deinit; /* Exit terminal de-initialization */ 224 225 static int attrcolor = -1; 226 #endif 227 228 static int init_done = 0; 229 230 public int auto_wrap; /* Terminal does \r\n when write past margin */ 231 public int ignaw; /* Terminal ignores \n immediately after wrap */ 232 public int erase_char; /* The user's erase char */ 233 public int erase2_char; /* The user's other erase char */ 234 public int kill_char; /* The user's line-kill char */ 235 public int werase_char; /* The user's word-erase char */ 236 public int sc_width, sc_height; /* Height & width of screen */ 237 public int bo_s_width, bo_e_width; /* Printing width of boldface seq */ 238 public int ul_s_width, ul_e_width; /* Printing width of underline seq */ 239 public int so_s_width, so_e_width; /* Printing width of standout seq */ 240 public int bl_s_width, bl_e_width; /* Printing width of blink seq */ 241 public int above_mem, below_mem; /* Memory retained above/below screen */ 242 public int can_goto_line; /* Can move cursor to any line */ 243 public int clear_bg; /* Clear fills with background color */ 244 public int missing_cap = 0; /* Some capability is missing */ 245 public constant char *kent = NULL; /* Keypad ENTER sequence */ 246 public lbool term_init_done = FALSE; 247 public lbool full_screen = TRUE; 248 249 static int attrmode = AT_NORMAL; 250 static int termcap_debug = -1; 251 static int no_alt_screen; /* sc_init does not switch to alt screen */ 252 extern int binattr; 253 extern int one_screen; 254 255 #if !MSDOS_COMPILER 256 static constant char *cheaper(constant char *t1, constant char *t2, constant char *def); 257 static void tmodes(constant char *incap, constant char *outcap, constant char **instr, 258 constant char **outstr, constant char *def_instr, constant char *def_outstr, char **spp); 259 #endif 260 261 /* 262 * These two variables are sometimes defined in, 263 * and needed by, the termcap library. 264 */ 265 #if MUST_DEFINE_OSPEED 266 extern short ospeed; /* Terminal output baud rate */ 267 extern char PC; /* Pad character */ 268 #endif 269 #ifdef _OSK 270 short ospeed; 271 char PC_, *UP, *BC; 272 #endif 273 274 extern int quiet; /* If VERY_QUIET, use visual bell for bell */ 275 extern int no_vbell; 276 extern int no_back_scroll; 277 extern int no_init; 278 extern int no_keypad; 279 extern int sigs; 280 extern int top_scroll; 281 extern int quit_if_one_screen; 282 extern int oldbot; 283 extern int mousecap; 284 extern int is_tty; 285 extern int use_color; 286 #if HILITE_SEARCH 287 extern int hilite_search; 288 #endif 289 #if MSDOS_COMPILER==WIN32C 290 extern int wscroll; 291 extern HANDLE tty; 292 #else 293 extern int tty; 294 #endif 295 296 #if (HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS) || defined(TCGETA) 297 /* 298 * Set termio flags for use by less. 299 */ 300 static void set_termio_flags( 301 #if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS 302 struct termios *s 303 #else 304 struct termio *s 305 #endif 306 ) 307 { 308 s->c_lflag &= ~(0 309 #ifdef ICANON 310 | ICANON 311 #endif 312 #ifdef ECHO 313 | ECHO 314 #endif 315 #ifdef ECHOE 316 | ECHOE 317 #endif 318 #ifdef ECHOK 319 | ECHOK 320 #endif 321 #ifdef ECHONL 322 | ECHONL 323 #endif 324 ); 325 326 s->c_oflag |= (0 327 #ifdef OXTABS 328 | OXTABS 329 #else 330 #ifdef TAB3 331 | TAB3 332 #else 333 #ifdef XTABS 334 | XTABS 335 #endif 336 #endif 337 #endif 338 #ifdef OPOST 339 | OPOST 340 #endif 341 #ifdef ONLCR 342 | ONLCR 343 #endif 344 ); 345 346 s->c_oflag &= ~(0 347 #ifdef ONOEOT 348 | ONOEOT 349 #endif 350 #ifdef OCRNL 351 | OCRNL 352 #endif 353 #ifdef ONOCR 354 | ONOCR 355 #endif 356 #ifdef ONLRET 357 | ONLRET 358 #endif 359 ); 360 } 361 #endif 362 363 /* 364 * Change terminal to "raw mode", or restore to "normal" mode. 365 * "Raw mode" means 366 * 1. An outstanding read will complete on receipt of a single keystroke. 367 * 2. Input is not echoed. 368 * 3. On output, \n is mapped to \r\n. 369 * 4. \t is NOT expanded into spaces. 370 * 5. Signal-causing characters such as ctrl-C (interrupt), 371 * etc. are NOT disabled. 372 * It doesn't matter whether an input \n is mapped to \r, or vice versa. 373 */ 374 public void raw_mode(int on) 375 { 376 static int curr_on = 0; 377 378 if (on == curr_on) 379 return; 380 erase2_char = '\b'; /* in case OS doesn't know about erase2 */ 381 #if LESSTEST 382 if (is_lesstest()) 383 { 384 /* {{ For consistent conditions when running tests. }} */ 385 erase_char = '\b'; 386 kill_char = CONTROL('U'); 387 werase_char = CONTROL('W'); 388 } else 389 #endif /*LESSTEST*/ 390 #if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS 391 { 392 struct termios s; 393 static struct termios save_term; 394 static int saved_term = 0; 395 396 if (on) 397 { 398 /* 399 * Get terminal modes. 400 */ 401 if (tcgetattr(tty, &s) < 0) 402 { 403 erase_char = '\b'; 404 kill_char = CONTROL('U'); 405 werase_char = CONTROL('W'); 406 } else 407 { 408 /* 409 * Save modes and set certain variables dependent on modes. 410 */ 411 if (!saved_term) 412 { 413 save_term = s; 414 saved_term = 1; 415 } 416 #if HAVE_OSPEED 417 switch (cfgetospeed(&s)) 418 { 419 #ifdef B0 420 case B0: ospeed = 0; break; 421 #endif 422 #ifdef B50 423 case B50: ospeed = 1; break; 424 #endif 425 #ifdef B75 426 case B75: ospeed = 2; break; 427 #endif 428 #ifdef B110 429 case B110: ospeed = 3; break; 430 #endif 431 #ifdef B134 432 case B134: ospeed = 4; break; 433 #endif 434 #ifdef B150 435 case B150: ospeed = 5; break; 436 #endif 437 #ifdef B200 438 case B200: ospeed = 6; break; 439 #endif 440 #ifdef B300 441 case B300: ospeed = 7; break; 442 #endif 443 #ifdef B600 444 case B600: ospeed = 8; break; 445 #endif 446 #ifdef B1200 447 case B1200: ospeed = 9; break; 448 #endif 449 #ifdef B1800 450 case B1800: ospeed = 10; break; 451 #endif 452 #ifdef B2400 453 case B2400: ospeed = 11; break; 454 #endif 455 #ifdef B4800 456 case B4800: ospeed = 12; break; 457 #endif 458 #ifdef B9600 459 case B9600: ospeed = 13; break; 460 #endif 461 #ifdef EXTA 462 case EXTA: ospeed = 14; break; 463 #endif 464 #ifdef EXTB 465 case EXTB: ospeed = 15; break; 466 #endif 467 #ifdef B57600 468 case B57600: ospeed = 16; break; 469 #endif 470 #ifdef B115200 471 case B115200: ospeed = 17; break; 472 #endif 473 default: ; 474 } 475 #endif 476 erase_char = s.c_cc[VERASE]; 477 #ifdef VERASE2 478 erase2_char = s.c_cc[VERASE2]; 479 #endif 480 kill_char = s.c_cc[VKILL]; 481 #ifdef VWERASE 482 werase_char = s.c_cc[VWERASE]; 483 #else 484 werase_char = CONTROL('W'); 485 #endif 486 487 /* 488 * Set the modes to the way we want them. 489 */ 490 set_termio_flags(&s); 491 s.c_cc[VMIN] = 1; 492 s.c_cc[VTIME] = 0; 493 #ifdef VLNEXT 494 s.c_cc[VLNEXT] = 0; 495 #endif 496 #ifdef VDSUSP 497 s.c_cc[VDSUSP] = 0; 498 #endif 499 #ifdef VSTOP 500 s.c_cc[VSTOP] = 0; 501 #endif 502 #ifdef VSTART 503 s.c_cc[VSTART] = 0; 504 #endif 505 #ifdef VDISCARD 506 s.c_cc[VDISCARD] = 0; 507 #endif 508 #if MUST_SET_LINE_DISCIPLINE 509 /* 510 * System's termios is broken; need to explicitly 511 * request TERMIODISC line discipline. 512 */ 513 s.c_line = TERMIODISC; 514 #endif 515 } 516 } else 517 { 518 /* 519 * Restore saved modes. 520 */ 521 s = save_term; 522 } 523 #if HAVE_FSYNC 524 fsync(tty); 525 #endif 526 tcsetattr(tty, TCSADRAIN, &s); 527 #if MUST_SET_LINE_DISCIPLINE 528 if (!on) 529 { 530 /* 531 * Broken termios *ignores* any line discipline 532 * except TERMIODISC. A different old line discipline 533 * is therefore not restored, yet. Restore the old 534 * line discipline by hand. 535 */ 536 ioctl(tty, TIOCSETD, &save_term.c_line); 537 } 538 #endif 539 } 540 #else 541 #ifdef TCGETA 542 { 543 struct termio s; 544 static struct termio save_term; 545 static int saved_term = 0; 546 547 if (on) 548 { 549 /* 550 * Get terminal modes. 551 */ 552 ioctl(tty, TCGETA, &s); 553 554 /* 555 * Save modes and set certain variables dependent on modes. 556 */ 557 if (!saved_term) 558 { 559 save_term = s; 560 saved_term = 1; 561 } 562 #if HAVE_OSPEED 563 ospeed = s.c_cflag & CBAUD; 564 #endif 565 erase_char = s.c_cc[VERASE]; 566 kill_char = s.c_cc[VKILL]; 567 #ifdef VWERASE 568 werase_char = s.c_cc[VWERASE]; 569 #else 570 werase_char = CONTROL('W'); 571 #endif 572 573 /* 574 * Set the modes to the way we want them. 575 */ 576 set_termio_flags(&s); 577 s.c_cc[VMIN] = 1; 578 s.c_cc[VTIME] = 0; 579 #ifdef VSTOP 580 s.c_cc[VSTOP] = 0; 581 #endif 582 #ifdef VSTART 583 s.c_cc[VSTART] = 0; 584 #endif 585 } else 586 { 587 /* 588 * Restore saved modes. 589 */ 590 s = save_term; 591 } 592 ioctl(tty, TCSETAW, &s); 593 } 594 #else 595 #ifdef TIOCGETP 596 { 597 struct sgttyb s; 598 static struct sgttyb save_term; 599 static int saved_term = 0; 600 601 if (on) 602 { 603 /* 604 * Get terminal modes. 605 */ 606 ioctl(tty, TIOCGETP, &s); 607 608 /* 609 * Save modes and set certain variables dependent on modes. 610 */ 611 if (!saved_term) 612 { 613 save_term = s; 614 saved_term = 1; 615 } 616 #if HAVE_OSPEED 617 ospeed = s.sg_ospeed; 618 #endif 619 erase_char = s.sg_erase; 620 kill_char = s.sg_kill; 621 werase_char = CONTROL('W'); 622 623 /* 624 * Set the modes to the way we want them. 625 */ 626 s.sg_flags |= CBREAK; 627 s.sg_flags &= ~(ECHO|XTABS); 628 } else 629 { 630 /* 631 * Restore saved modes. 632 */ 633 s = save_term; 634 } 635 ioctl(tty, TIOCSETN, &s); 636 } 637 #else 638 #ifdef _OSK 639 { 640 struct sgbuf s; 641 static struct sgbuf save_term; 642 static int saved_term = 0; 643 644 if (on) 645 { 646 /* 647 * Get terminal modes. 648 */ 649 _gs_opt(tty, &s); 650 651 /* 652 * Save modes and set certain variables dependent on modes. 653 */ 654 if (!saved_term) 655 { 656 save_term = s; 657 saved_term = 1; 658 } 659 erase_char = s.sg_bspch; 660 kill_char = s.sg_dlnch; 661 werase_char = CONTROL('W'); 662 663 /* 664 * Set the modes to the way we want them. 665 */ 666 s.sg_echo = 0; 667 s.sg_eofch = 0; 668 s.sg_pause = 0; 669 s.sg_psch = 0; 670 } else 671 { 672 /* 673 * Restore saved modes. 674 */ 675 s = save_term; 676 } 677 _ss_opt(tty, &s); 678 } 679 #else 680 /* MS-DOS, Windows, or OS2 */ 681 #if OS2 682 /* OS2 */ 683 LSIGNAL(SIGINT, SIG_IGN); 684 #endif 685 erase_char = '\b'; 686 #if MSDOS_COMPILER==DJGPPC 687 kill_char = CONTROL('U'); 688 /* 689 * So that when we shell out or run another program, its 690 * stdin is in cooked mode. We do not switch stdin to binary 691 * mode if fd0 is zero, since that means we were called before 692 * tty was reopened in open_getchr, in which case we would be 693 * changing the original stdin device outside less. 694 */ 695 if (fd0 != 0) 696 setmode(0, on ? O_BINARY : O_TEXT); 697 #else 698 kill_char = ESC; 699 #endif 700 werase_char = CONTROL('W'); 701 #endif 702 #endif 703 #endif 704 #endif 705 curr_on = on; 706 } 707 708 #if !MSDOS_COMPILER 709 /* 710 * Some glue to prevent calling termcap functions if tgetent() failed. 711 */ 712 static int hardcopy; 713 714 static constant char * ltget_env(constant char *capname) 715 { 716 char name[64]; 717 718 if (termcap_debug) 719 { 720 struct env { struct env *next; char *name; char *value; }; 721 static struct env *envs = NULL; 722 struct env *p; 723 for (p = envs; p != NULL; p = p->next) 724 if (strcmp(p->name, capname) == 0) 725 return p->value; 726 p = (struct env *) ecalloc(1, sizeof(struct env)); 727 p->name = save(capname); 728 p->value = (char *) ecalloc(strlen(capname)+3, sizeof(char)); 729 sprintf(p->value, "<%s>", capname); 730 p->next = envs; 731 envs = p; 732 return p->value; 733 } 734 SNPRINTF1(name, sizeof(name), "LESS_TERMCAP_%s", capname); 735 return (lgetenv(name)); 736 } 737 738 static int ltgetflag(constant char *capname) 739 { 740 constant char *s; 741 742 if ((s = ltget_env(capname)) != NULL) 743 return (*s != '\0' && *s != '0'); 744 if (hardcopy) 745 return (0); 746 return (tgetflag(capname)); 747 } 748 749 static int ltgetnum(constant char *capname) 750 { 751 constant char *s; 752 753 if ((s = ltget_env(capname)) != NULL) 754 return (atoi(s)); 755 if (hardcopy) 756 return (-1); 757 return (tgetnum(capname)); 758 } 759 760 static constant char * ltgetstr(constant char *capname, char **pp) 761 { 762 constant char *s; 763 764 if ((s = ltget_env(capname)) != NULL) 765 return (s); 766 if (hardcopy) 767 return (NULL); 768 return (tgetstr(capname, pp)); 769 } 770 #endif /* MSDOS_COMPILER */ 771 772 /* 773 * Get size of the output screen. 774 */ 775 static void scrsize(void) 776 { 777 constant char *s; 778 int sys_height; 779 int sys_width; 780 #if !MSDOS_COMPILER 781 int n; 782 #endif 783 784 #define DEF_SC_WIDTH 80 785 #if MSDOS_COMPILER 786 #define DEF_SC_HEIGHT 25 787 #else 788 #define DEF_SC_HEIGHT 24 789 #endif 790 791 792 sys_width = sys_height = 0; 793 794 #if LESSTEST 795 if (0) /* can't use is_lesstest(): ttyin_name may not be set by scan_option yet */ 796 #endif /*LESSTEST*/ 797 { 798 #if MSDOS_COMPILER==MSOFTC 799 { 800 struct videoconfig w; 801 _getvideoconfig(&w); 802 sys_height = w.numtextrows; 803 sys_width = w.numtextcols; 804 } 805 #else 806 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 807 { 808 struct text_info w; 809 gettextinfo(&w); 810 sys_height = w.screenheight; 811 sys_width = w.screenwidth; 812 } 813 #else 814 #if MSDOS_COMPILER==WIN32C 815 { 816 CONSOLE_SCREEN_BUFFER_INFO scr; 817 GetConsoleScreenBufferInfo(con_out, &scr); 818 sys_height = scr.srWindow.Bottom - scr.srWindow.Top + 1; 819 sys_width = scr.srWindow.Right - scr.srWindow.Left + 1; 820 } 821 #else 822 #if OS2 823 { 824 int s[2]; 825 _scrsize(s); 826 sys_width = s[0]; 827 sys_height = s[1]; 828 /* 829 * When using terminal emulators for XFree86/OS2, the 830 * _scrsize function does not work well. 831 * Call the scrsize.exe program to get the window size. 832 */ 833 windowid = getenv("WINDOWID"); 834 if (windowid != NULL) 835 { 836 FILE *fd = popen("scrsize", "rt"); 837 if (fd != NULL) 838 { 839 int w, h; 840 fscanf(fd, "%i %i", &w, &h); 841 if (w > 0 && h > 0) 842 { 843 sys_width = w; 844 sys_height = h; 845 } 846 pclose(fd); 847 } 848 } 849 } 850 #else 851 #ifdef TIOCGWINSZ 852 { 853 struct winsize w; 854 if (ioctl(2, TIOCGWINSZ, &w) == 0) 855 { 856 if (w.ws_row > 0) 857 sys_height = w.ws_row; 858 if (w.ws_col > 0) 859 sys_width = w.ws_col; 860 } 861 } 862 #else 863 #ifdef WIOCGETD 864 { 865 struct uwdata w; 866 if (ioctl(2, WIOCGETD, &w) == 0) 867 { 868 if (w.uw_height > 0) 869 sys_height = w.uw_height / w.uw_vs; 870 if (w.uw_width > 0) 871 sys_width = w.uw_width / w.uw_hs; 872 } 873 } 874 #endif 875 #endif 876 #endif 877 #endif 878 #endif 879 #endif 880 } 881 882 if (sys_height > 0) 883 sc_height = sys_height; 884 else if ((s = lgetenv("LINES")) != NULL) 885 sc_height = atoi(s); 886 #if !MSDOS_COMPILER 887 else if ((n = ltgetnum("li")) > 0) 888 sc_height = n; 889 #endif 890 if ((s = lgetenv("LESS_LINES")) != NULL) 891 { 892 int height = atoi(s); 893 sc_height = (height < 0) ? sc_height + height : height; 894 full_screen = FALSE; 895 } 896 if (sc_height <= 0) 897 sc_height = DEF_SC_HEIGHT; 898 899 if (sys_width > 0) 900 sc_width = sys_width; 901 else if ((s = lgetenv("COLUMNS")) != NULL) 902 sc_width = atoi(s); 903 #if !MSDOS_COMPILER 904 else if ((n = ltgetnum("co")) > 0) 905 sc_width = n; 906 #endif 907 if ((s = lgetenv("LESS_COLUMNS")) != NULL) 908 { 909 int width = atoi(s); 910 sc_width = (width < 0) ? sc_width + width : width; 911 } 912 if (sc_width <= 0) 913 sc_width = DEF_SC_WIDTH; 914 screen_size_changed(); 915 } 916 917 /* 918 * Recalculate things that depend on the screen size. 919 */ 920 public void screen_size_changed(void) 921 { 922 calc_jump_sline(); 923 calc_shift_count(); 924 calc_match_shift(); 925 } 926 927 #if MSDOS_COMPILER==MSOFTC 928 /* 929 * Figure out how many empty loops it takes to delay a millisecond. 930 */ 931 static void get_clock(void) 932 { 933 clock_t start; 934 935 /* 936 * Get synchronized at the start of a tick. 937 */ 938 start = clock(); 939 while (clock() == start) 940 ; 941 /* 942 * Now count loops till the next tick. 943 */ 944 start = clock(); 945 msec_loops = 0; 946 while (clock() == start) 947 msec_loops++; 948 /* 949 * Convert from (loops per clock) to (loops per millisecond). 950 */ 951 msec_loops *= CLOCKS_PER_SEC; 952 msec_loops /= 1000; 953 } 954 955 /* 956 * Delay for a specified number of milliseconds. 957 */ 958 static void delay(int msec) 959 { 960 long i; 961 962 while (msec-- > 0) 963 { 964 for (i = 0; i < msec_loops; i++) 965 (void) clock(); 966 } 967 } 968 #endif 969 970 /* 971 * Return the characters actually input by a "special" key. 972 */ 973 public constant char * special_key_str(int key) 974 { 975 static char tbuf[40]; 976 constant char *s; 977 #if MSDOS_COMPILER || OS2 978 static char k_right[] = { '\340', PCK_RIGHT, 0 }; 979 static char k_left[] = { '\340', PCK_LEFT, 0 }; 980 static char k_ctl_right[] = { '\340', PCK_CTL_RIGHT, 0 }; 981 static char k_ctl_left[] = { '\340', PCK_CTL_LEFT, 0 }; 982 static char k_insert[] = { '\340', PCK_INSERT, 0 }; 983 static char k_delete[] = { '\340', PCK_DELETE, 0 }; 984 static char k_ctl_delete[] = { '\340', PCK_CTL_DELETE, 0 }; 985 static char k_ctl_backspace[] = { '\177', 0 }; 986 static char k_backspace[] = { '\b', 0 }; 987 static char k_home[] = { '\340', PCK_HOME, 0 }; 988 static char k_end[] = { '\340', PCK_END, 0 }; 989 static char k_up[] = { '\340', PCK_UP, 0 }; 990 static char k_down[] = { '\340', PCK_DOWN, 0 }; 991 static char k_backtab[] = { '\340', PCK_SHIFT_TAB, 0 }; 992 static char k_pagedown[] = { '\340', PCK_PAGEDOWN, 0 }; 993 static char k_pageup[] = { '\340', PCK_PAGEUP, 0 }; 994 static char k_f1[] = { '\340', PCK_F1, 0 }; 995 #endif 996 #if !MSDOS_COMPILER 997 char *sp = tbuf; 998 #endif 999 1000 switch (key) 1001 { 1002 #if OS2 1003 /* 1004 * If windowid is not NULL, assume less is executed in 1005 * the XFree86 environment. 1006 */ 1007 case SK_RIGHT_ARROW: 1008 s = windowid ? ltgetstr("kr", &sp) : k_right; 1009 break; 1010 case SK_LEFT_ARROW: 1011 s = windowid ? ltgetstr("kl", &sp) : k_left; 1012 break; 1013 case SK_UP_ARROW: 1014 s = windowid ? ltgetstr("ku", &sp) : k_up; 1015 break; 1016 case SK_DOWN_ARROW: 1017 s = windowid ? ltgetstr("kd", &sp) : k_down; 1018 break; 1019 case SK_PAGE_UP: 1020 s = windowid ? ltgetstr("kP", &sp) : k_pageup; 1021 break; 1022 case SK_PAGE_DOWN: 1023 s = windowid ? ltgetstr("kN", &sp) : k_pagedown; 1024 break; 1025 case SK_HOME: 1026 s = windowid ? ltgetstr("kh", &sp) : k_home; 1027 break; 1028 case SK_END: 1029 s = windowid ? ltgetstr("@7", &sp) : k_end; 1030 break; 1031 case SK_DELETE: 1032 s = windowid ? ltgetstr("kD", &sp) : k_delete; 1033 if (s == NULL) 1034 { 1035 tbuf[0] = '\177'; 1036 tbuf[1] = '\0'; 1037 s = tbuf; 1038 } 1039 break; 1040 #endif 1041 #if MSDOS_COMPILER 1042 case SK_RIGHT_ARROW: 1043 s = k_right; 1044 break; 1045 case SK_LEFT_ARROW: 1046 s = k_left; 1047 break; 1048 case SK_UP_ARROW: 1049 s = k_up; 1050 break; 1051 case SK_DOWN_ARROW: 1052 s = k_down; 1053 break; 1054 case SK_PAGE_UP: 1055 s = k_pageup; 1056 break; 1057 case SK_PAGE_DOWN: 1058 s = k_pagedown; 1059 break; 1060 case SK_HOME: 1061 s = k_home; 1062 break; 1063 case SK_END: 1064 s = k_end; 1065 break; 1066 case SK_DELETE: 1067 s = k_delete; 1068 break; 1069 #endif 1070 #if MSDOS_COMPILER || OS2 1071 case SK_INSERT: 1072 s = k_insert; 1073 break; 1074 case SK_CTL_LEFT_ARROW: 1075 s = k_ctl_left; 1076 break; 1077 case SK_CTL_RIGHT_ARROW: 1078 s = k_ctl_right; 1079 break; 1080 case SK_CTL_BACKSPACE: 1081 s = k_ctl_backspace; 1082 break; 1083 case SK_CTL_DELETE: 1084 s = k_ctl_delete; 1085 break; 1086 case SK_BACKSPACE: 1087 s = k_backspace; 1088 break; 1089 case SK_F1: 1090 s = k_f1; 1091 break; 1092 case SK_BACKTAB: 1093 s = k_backtab; 1094 break; 1095 #else 1096 case SK_RIGHT_ARROW: 1097 s = ltgetstr("kr", &sp); 1098 break; 1099 case SK_LEFT_ARROW: 1100 s = ltgetstr("kl", &sp); 1101 break; 1102 case SK_UP_ARROW: 1103 s = ltgetstr("ku", &sp); 1104 break; 1105 case SK_DOWN_ARROW: 1106 s = ltgetstr("kd", &sp); 1107 break; 1108 case SK_PAGE_UP: 1109 s = ltgetstr("kP", &sp); 1110 break; 1111 case SK_PAGE_DOWN: 1112 s = ltgetstr("kN", &sp); 1113 break; 1114 case SK_HOME: 1115 s = ltgetstr("kh", &sp); 1116 break; 1117 case SK_END: 1118 s = ltgetstr("@7", &sp); 1119 break; 1120 case SK_DELETE: 1121 s = ltgetstr("kD", &sp); 1122 if (s == NULL) 1123 { 1124 tbuf[0] = '\177'; 1125 tbuf[1] = '\0'; 1126 s = tbuf; 1127 } 1128 break; 1129 case SK_BACKSPACE: 1130 s = ltgetstr("kb", &sp); 1131 if (s == NULL) 1132 { 1133 tbuf[0] = '\b'; 1134 tbuf[1] = '\0'; 1135 s = tbuf; 1136 } 1137 break; 1138 #endif 1139 case SK_CONTROL_K: 1140 tbuf[0] = CONTROL('K'); 1141 tbuf[1] = '\0'; 1142 s = tbuf; 1143 break; 1144 default: 1145 return (NULL); 1146 } 1147 return (s); 1148 } 1149 1150 #if MSDOS_COMPILER 1151 public void init_win_colors(void) 1152 { 1153 if (nm_fg_color == CV_ERROR || nm_fg_color == CV_NOCHANGE) nm_fg_color = sy_fg_color; 1154 if (nm_bg_color == CV_ERROR || nm_bg_color == CV_NOCHANGE) nm_bg_color = sy_bg_color; 1155 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; 1156 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; 1157 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; 1158 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; 1159 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; 1160 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; 1161 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; 1162 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; 1163 nm_fg_color |= nm_attr; 1164 bo_fg_color |= bo_attr; 1165 ul_fg_color |= ul_attr; 1166 so_fg_color |= so_attr; 1167 bl_fg_color |= bl_attr; 1168 } 1169 #endif /* MSDOS_COMPILER */ 1170 1171 /* 1172 * Get terminal capabilities via termcap. 1173 */ 1174 public void get_term(void) 1175 { 1176 termcap_debug = !isnullenv(lgetenv("LESS_TERMCAP_DEBUG")); 1177 #if MSDOS_COMPILER 1178 auto_wrap = 1; 1179 ignaw = 0; 1180 can_goto_line = 1; 1181 clear_bg = 1; 1182 /* 1183 * Set up default colors. 1184 * The xx_s_width and xx_e_width vars are already initialized to 0. 1185 */ 1186 #if MSDOS_COMPILER==MSOFTC 1187 sy_bg_color = _getbkcolor(); 1188 sy_fg_color = _gettextcolor(); 1189 get_clock(); 1190 #else 1191 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 1192 { 1193 struct text_info w; 1194 gettextinfo(&w); 1195 sy_bg_color = (w.attribute >> 4) & 0x0F; 1196 sy_fg_color = (w.attribute >> 0) & 0x0F; 1197 } 1198 #else 1199 #if MSDOS_COMPILER==WIN32C 1200 { 1201 CONSOLE_SCREEN_BUFFER_INFO scr; 1202 1203 con_out_save = con_out = GetStdHandle(STD_OUTPUT_HANDLE); 1204 /* 1205 * Always open stdin in binary. Note this *must* be done 1206 * before any file operations have been done on fd0. 1207 */ 1208 SET_BINARY(0); 1209 GetConsoleMode(con_out, &init_console_output_mode); 1210 GetConsoleScreenBufferInfo(con_out, &scr); 1211 curr_attr = scr.wAttributes; 1212 sy_bg_color = (curr_attr & BG_COLORS) >> 4; /* normalize */ 1213 sy_fg_color = curr_attr & FG_COLORS; 1214 } 1215 #endif 1216 #endif 1217 #endif 1218 init_win_colors(); 1219 1220 /* 1221 * Get size of the screen. 1222 */ 1223 scrsize(); 1224 pos_init(); 1225 1226 #else /* !MSDOS_COMPILER */ 1227 { 1228 char *sp; 1229 constant char *t1; 1230 constant char *t2; 1231 constant char *term; 1232 /* 1233 * Some termcap libraries assume termbuf is static 1234 * (accessible after tgetent returns). 1235 */ 1236 static char termbuf[TERMBUF_SIZE]; 1237 static char sbuf[TERMSBUF_SIZE]; 1238 1239 #if OS2 1240 /* 1241 * Make sure the termcap database is available. 1242 */ 1243 constant char *cp = lgetenv("TERMCAP"); 1244 if (isnullenv(cp)) 1245 { 1246 char *termcap; 1247 if ((sp = homefile("termcap.dat")) != NULL) 1248 { 1249 termcap = (char *) ecalloc(strlen(sp)+9, sizeof(char)); 1250 sprintf(termcap, "TERMCAP=%s", sp); 1251 free(sp); 1252 putenv(termcap); 1253 } 1254 } 1255 #endif 1256 /* 1257 * Find out what kind of terminal this is. 1258 */ 1259 if ((term = lgetenv("TERM")) == NULL) 1260 term = DEFAULT_TERM; 1261 hardcopy = 0; 1262 /* {{ Should probably just pass NULL instead of termbuf. }} */ 1263 if (tgetent(termbuf, term) != TGETENT_OK) 1264 hardcopy = 1; 1265 if (ltgetflag("hc")) 1266 hardcopy = 1; 1267 1268 /* 1269 * Get size of the screen. 1270 */ 1271 scrsize(); 1272 pos_init(); 1273 1274 auto_wrap = ltgetflag("am"); 1275 ignaw = ltgetflag("xn"); 1276 above_mem = ltgetflag("da"); 1277 below_mem = ltgetflag("db"); 1278 clear_bg = ltgetflag("ut"); 1279 no_alt_screen = ltgetflag("NR"); 1280 1281 /* 1282 * Assumes termcap variable "sg" is the printing width of: 1283 * the standout sequence, the end standout sequence, 1284 * the underline sequence, the end underline sequence, 1285 * the boldface sequence, and the end boldface sequence. 1286 */ 1287 if ((so_s_width = ltgetnum("sg")) < 0) 1288 so_s_width = 0; 1289 so_e_width = so_s_width; 1290 1291 bo_s_width = bo_e_width = so_s_width; 1292 ul_s_width = ul_e_width = so_s_width; 1293 bl_s_width = bl_e_width = so_s_width; 1294 1295 #if HILITE_SEARCH 1296 if (so_s_width > 0 || so_e_width > 0) 1297 /* 1298 * Disable highlighting by default on magic cookie terminals. 1299 * Turning on highlighting might change the displayed width 1300 * of a line, causing the display to get messed up. 1301 * The user can turn it back on with -g, 1302 * but she won't like the results. 1303 */ 1304 hilite_search = 0; 1305 #endif 1306 1307 /* 1308 * Get various string-valued capabilities. 1309 */ 1310 sp = sbuf; 1311 1312 #if HAVE_OSPEED 1313 sc_pad = ltgetstr("pc", &sp); 1314 if (sc_pad != NULL) 1315 PC = *sc_pad; 1316 #endif 1317 1318 sc_s_keypad = ltgetstr("ks", &sp); 1319 if (sc_s_keypad == NULL) 1320 sc_s_keypad = ""; 1321 sc_e_keypad = ltgetstr("ke", &sp); 1322 if (sc_e_keypad == NULL) 1323 sc_e_keypad = ""; 1324 kent = ltgetstr("@8", &sp); 1325 1326 sc_s_mousecap = ltgetstr("MOUSE_START", &sp); 1327 if (sc_s_mousecap == NULL) 1328 sc_s_mousecap = ESCS "[?1000h" ESCS "[?1006h"; 1329 sc_e_mousecap = ltgetstr("MOUSE_END", &sp); 1330 if (sc_e_mousecap == NULL) 1331 sc_e_mousecap = ESCS "[?1006l" ESCS "[?1000l"; 1332 1333 sc_init = ltgetstr("ti", &sp); 1334 if (sc_init == NULL) 1335 sc_init = ""; 1336 1337 sc_deinit= ltgetstr("te", &sp); 1338 if (sc_deinit == NULL) 1339 sc_deinit = ""; 1340 1341 sc_eol_clear = ltgetstr("ce", &sp); 1342 if (sc_eol_clear == NULL || *sc_eol_clear == '\0') 1343 { 1344 missing_cap = 1; 1345 sc_eol_clear = ""; 1346 } 1347 1348 sc_eos_clear = ltgetstr("cd", &sp); 1349 if (below_mem && (sc_eos_clear == NULL || *sc_eos_clear == '\0')) 1350 { 1351 missing_cap = 1; 1352 sc_eos_clear = ""; 1353 } 1354 1355 sc_clear = ltgetstr("cl", &sp); 1356 if (sc_clear == NULL || *sc_clear == '\0') 1357 { 1358 missing_cap = 1; 1359 sc_clear = "\n\n"; 1360 } 1361 1362 sc_move = ltgetstr("cm", &sp); 1363 if (sc_move == NULL || *sc_move == '\0') 1364 { 1365 /* 1366 * This is not an error here, because we don't 1367 * always need sc_move. 1368 * We need it only if we don't have home or lower-left. 1369 */ 1370 sc_move = ""; 1371 can_goto_line = 0; 1372 } else 1373 can_goto_line = 1; 1374 1375 tmodes("so", "se", &sc_s_in, &sc_s_out, "", "", &sp); 1376 tmodes("us", "ue", &sc_u_in, &sc_u_out, sc_s_in, sc_s_out, &sp); 1377 tmodes("md", "me", &sc_b_in, &sc_b_out, sc_s_in, sc_s_out, &sp); 1378 tmodes("mb", "me", &sc_bl_in, &sc_bl_out, sc_s_in, sc_s_out, &sp); 1379 1380 sc_visual_bell = ltgetstr("vb", &sp); 1381 if (sc_visual_bell == NULL) 1382 sc_visual_bell = ""; 1383 1384 if (ltgetflag("bs")) 1385 sc_backspace = "\b"; 1386 else 1387 { 1388 sc_backspace = ltgetstr("bc", &sp); 1389 if (sc_backspace == NULL || *sc_backspace == '\0') 1390 sc_backspace = "\b"; 1391 } 1392 1393 /* 1394 * Choose between using "ho" and "cm" ("home" and "cursor move") 1395 * to move the cursor to the upper left corner of the screen. 1396 */ 1397 t1 = ltgetstr("ho", &sp); 1398 if (t1 == NULL) 1399 t1 = ""; 1400 if (*sc_move == '\0') 1401 t2 = ""; 1402 else 1403 { 1404 strcpy(sp, tgoto(sc_move, 0, 0)); 1405 t2 = sp; 1406 sp += strlen(sp) + 1; 1407 } 1408 sc_home = cheaper(t1, t2, "|\b^"); 1409 1410 /* 1411 * Choose between using "ll" and "cm" ("lower left" and "cursor move") 1412 * to move the cursor to the lower left corner of the screen. 1413 */ 1414 t1 = ltgetstr("ll", &sp); 1415 if (t1 == NULL || !full_screen) 1416 t1 = ""; 1417 if (*sc_move == '\0') 1418 t2 = ""; 1419 else 1420 { 1421 strcpy(sp, tgoto(sc_move, 0, sc_height-1)); 1422 t2 = sp; 1423 sp += strlen(sp) + 1; 1424 } 1425 sc_lower_left = cheaper(t1, t2, "\r"); 1426 1427 /* 1428 * Get carriage return string. 1429 */ 1430 sc_return = ltgetstr("cr", &sp); 1431 if (sc_return == NULL) 1432 sc_return = "\r"; 1433 1434 /* 1435 * Choose between using "al" or "sr" ("add line" or "scroll reverse") 1436 * to add a line at the top of the screen. 1437 */ 1438 t1 = ltgetstr("al", &sp); 1439 if (t1 == NULL) 1440 t1 = ""; 1441 t2 = ltgetstr("sr", &sp); 1442 if (t2 == NULL) 1443 t2 = ""; 1444 #if OS2 1445 if (*t1 == '\0' && *t2 == '\0') 1446 sc_addline = ""; 1447 else 1448 #endif 1449 if (above_mem) 1450 sc_addline = t1; 1451 else 1452 sc_addline = cheaper(t1, t2, ""); 1453 if (*sc_addline == '\0') 1454 { 1455 /* 1456 * Force repaint on any backward movement. 1457 */ 1458 no_back_scroll = 1; 1459 } 1460 } 1461 #endif /* MSDOS_COMPILER */ 1462 } 1463 1464 #if !MSDOS_COMPILER 1465 /* 1466 * Return the cost of displaying a termcap string. 1467 * We use the trick of calling tputs, but as a char printing function 1468 * we give it inc_costcount, which just increments "costcount". 1469 * This tells us how many chars would be printed by using this string. 1470 * {{ Couldn't we just use strlen? }} 1471 */ 1472 static int costcount; 1473 1474 /*ARGSUSED*/ 1475 static int inc_costcount(int c) 1476 { 1477 costcount++; 1478 return (c); 1479 } 1480 1481 static int cost(constant char *t) 1482 { 1483 costcount = 0; 1484 tputs(t, sc_height, inc_costcount); 1485 return (costcount); 1486 } 1487 1488 /* 1489 * Return the "best" of the two given termcap strings. 1490 * The best, if both exist, is the one with the lower 1491 * cost (see cost() function). 1492 */ 1493 static constant char * cheaper(constant char *t1, constant char *t2, constant char *def) 1494 { 1495 if (*t1 == '\0' && *t2 == '\0') 1496 { 1497 missing_cap = 1; 1498 return (def); 1499 } 1500 if (*t1 == '\0') 1501 return (t2); 1502 if (*t2 == '\0') 1503 return (t1); 1504 if (cost(t1) < cost(t2)) 1505 return (t1); 1506 return (t2); 1507 } 1508 1509 static void tmodes(constant char *incap, constant char *outcap, constant char **instr, constant char **outstr, constant char *def_instr, constant char *def_outstr, char **spp) 1510 { 1511 *instr = ltgetstr(incap, spp); 1512 if (*instr == NULL) 1513 { 1514 /* Use defaults. */ 1515 *instr = def_instr; 1516 *outstr = def_outstr; 1517 return; 1518 } 1519 1520 *outstr = ltgetstr(outcap, spp); 1521 if (*outstr == NULL) 1522 /* No specific out capability; use "me". */ 1523 *outstr = ltgetstr("me", spp); 1524 if (*outstr == NULL) 1525 /* Don't even have "me"; use a null string. */ 1526 *outstr = ""; 1527 } 1528 1529 #endif /* MSDOS_COMPILER */ 1530 1531 1532 /* 1533 * Below are the functions which perform all the 1534 * terminal-specific screen manipulation. 1535 */ 1536 1537 1538 #if MSDOS_COMPILER 1539 1540 #if MSDOS_COMPILER==WIN32C 1541 static void _settextposition(int row, int col) 1542 { 1543 COORD cpos; 1544 CONSOLE_SCREEN_BUFFER_INFO csbi; 1545 1546 GetConsoleScreenBufferInfo(con_out, &csbi); 1547 cpos.X = csbi.srWindow.Left + (col - 1); 1548 cpos.Y = csbi.srWindow.Top + (row - 1); 1549 SetConsoleCursorPosition(con_out, cpos); 1550 } 1551 #endif 1552 1553 /* 1554 * Initialize the screen to the correct color at startup. 1555 */ 1556 static void initcolor(void) 1557 { 1558 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 1559 intensevideo(); 1560 #endif 1561 SETCOLORS(nm_fg_color, nm_bg_color); 1562 #if 0 1563 /* 1564 * This clears the screen at startup. This is different from 1565 * the behavior of other versions of less. Disable it for now. 1566 */ 1567 char *blanks; 1568 int row; 1569 int col; 1570 1571 /* 1572 * Create a complete, blank screen using "normal" colors. 1573 */ 1574 SETCOLORS(nm_fg_color, nm_bg_color); 1575 blanks = (char *) ecalloc(width+1, sizeof(char)); 1576 for (col = 0; col < sc_width; col++) 1577 blanks[col] = ' '; 1578 blanks[sc_width] = '\0'; 1579 for (row = 0; row < sc_height; row++) 1580 _outtext(blanks); 1581 free(blanks); 1582 #endif 1583 } 1584 #endif 1585 1586 #if MSDOS_COMPILER==WIN32C 1587 1588 /* 1589 * Enable virtual terminal processing, if available. 1590 */ 1591 static void win32_init_vt_term(void) 1592 { 1593 DWORD console_output_mode; 1594 1595 if (vt_enabled == 0 || (vt_enabled == 1 && con_out == con_out_ours)) 1596 return; 1597 1598 console_output_mode = init_console_output_mode | ENABLE_VIRTUAL_TERMINAL_PROCESSING; 1599 vt_enabled = SetConsoleMode(con_out, console_output_mode); 1600 if (vt_enabled) 1601 { 1602 auto_wrap = 0; 1603 ignaw = 1; 1604 } 1605 } 1606 1607 static void win32_deinit_vt_term(void) 1608 { 1609 if (vt_enabled == 1 && con_out == con_out_save) 1610 SetConsoleMode(con_out, init_console_output_mode); 1611 } 1612 1613 /* 1614 * Termcap-like init with a private win32 console. 1615 */ 1616 static void win32_init_term(void) 1617 { 1618 CONSOLE_SCREEN_BUFFER_INFO scr; 1619 COORD size; 1620 1621 if (con_out_save == INVALID_HANDLE_VALUE) 1622 return; 1623 1624 GetConsoleScreenBufferInfo(con_out_save, &scr); 1625 1626 if (con_out_ours == INVALID_HANDLE_VALUE) 1627 { 1628 /* 1629 * Create our own screen buffer, so that we 1630 * may restore the original when done. 1631 */ 1632 con_out_ours = CreateConsoleScreenBuffer( 1633 GENERIC_WRITE | GENERIC_READ, 1634 FILE_SHARE_WRITE | FILE_SHARE_READ, 1635 (LPSECURITY_ATTRIBUTES) NULL, 1636 CONSOLE_TEXTMODE_BUFFER, 1637 (LPVOID) NULL); 1638 } 1639 1640 size.X = scr.srWindow.Right - scr.srWindow.Left + 1; 1641 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1; 1642 SetConsoleScreenBufferSize(con_out_ours, size); 1643 SetConsoleActiveScreenBuffer(con_out_ours); 1644 con_out = con_out_ours; 1645 } 1646 1647 /* 1648 * Restore the startup console. 1649 */ 1650 static void win32_deinit_term(void) 1651 { 1652 if (con_out_save == INVALID_HANDLE_VALUE) 1653 return; 1654 if (quitting) 1655 (void) CloseHandle(con_out_ours); 1656 SetConsoleActiveScreenBuffer(con_out_save); 1657 con_out = con_out_save; 1658 } 1659 1660 #endif 1661 1662 #if !MSDOS_COMPILER 1663 static void do_tputs(constant char *str, int affcnt, int (*f_putc)(int)) 1664 { 1665 #if LESSTEST 1666 if (is_lesstest() && f_putc == putchr) 1667 putstr(str); 1668 else 1669 #endif /*LESSTEST*/ 1670 tputs(str, affcnt, f_putc); 1671 } 1672 1673 /* 1674 * Like tputs but we handle $<...> delay strings here because 1675 * some implementations of tputs don't perform delays correctly. 1676 */ 1677 static void ltputs(constant char *str, int affcnt, int (*f_putc)(int)) 1678 { 1679 while (str != NULL && *str != '\0') 1680 { 1681 #if HAVE_STRSTR 1682 constant char *obrac = strstr(str, "$<"); 1683 if (obrac != NULL) 1684 { 1685 char str2[64]; 1686 size_t slen = ptr_diff(obrac, str); 1687 if (slen < sizeof(str2)) 1688 { 1689 int delay; 1690 /* Output first part of string (before "$<"). */ 1691 memcpy(str2, str, slen); 1692 str2[slen] = '\0'; 1693 do_tputs(str2, affcnt, f_putc); 1694 str += slen + 2; 1695 /* Perform the delay. */ 1696 delay = lstrtoic(str, &str, 10); 1697 if (*str == '*') 1698 if (ckd_mul(&delay, delay, affcnt)) 1699 delay = INT_MAX; 1700 flush(); 1701 sleep_ms(delay); 1702 /* Skip past closing ">" at end of delay string. */ 1703 str = strstr(str, ">"); 1704 if (str != NULL) 1705 str++; 1706 continue; 1707 } 1708 } 1709 #endif 1710 /* Pass the rest of the string to tputs and we're done. */ 1711 do_tputs(str, affcnt, f_putc); 1712 break; 1713 } 1714 } 1715 #endif /* MSDOS_COMPILER */ 1716 1717 /* 1718 * Configure the terminal so mouse clicks and wheel moves 1719 * produce input to less. 1720 */ 1721 public void init_mouse(void) 1722 { 1723 #if !MSDOS_COMPILER 1724 ltputs(sc_s_mousecap, sc_height, putchr); 1725 #else 1726 #if MSDOS_COMPILER==WIN32C 1727 curr_console_input_mode = mouse_console_input_mode; 1728 SetConsoleMode(tty, curr_console_input_mode); 1729 #endif 1730 #endif 1731 } 1732 1733 /* 1734 * Configure the terminal so mouse clicks and wheel moves 1735 * are handled by the system (so text can be selected, etc). 1736 */ 1737 public void deinit_mouse(void) 1738 { 1739 #if !MSDOS_COMPILER 1740 ltputs(sc_e_mousecap, sc_height, putchr); 1741 #else 1742 #if MSDOS_COMPILER==WIN32C 1743 curr_console_input_mode = base_console_input_mode; 1744 SetConsoleMode(tty, curr_console_input_mode); 1745 #endif 1746 #endif 1747 } 1748 1749 /* 1750 * Initialize terminal 1751 */ 1752 public void init(void) 1753 { 1754 clear_bot_if_needed(); 1755 #if !MSDOS_COMPILER 1756 if (!(quit_if_one_screen && one_screen)) 1757 { 1758 if (!no_init) 1759 { 1760 ltputs(sc_init, sc_height, putchr); 1761 /* 1762 * Some terminals leave the cursor unmoved when switching 1763 * to the alt screen. To avoid having the text appear at 1764 * a seemingly random line on the alt screen, move to 1765 * lower left if we are using an alt screen. 1766 */ 1767 if (*sc_init != '\0' && *sc_deinit != '\0' && !no_alt_screen) 1768 lower_left(); 1769 term_init_done = 1; 1770 } 1771 if (!no_keypad) 1772 ltputs(sc_s_keypad, sc_height, putchr); 1773 if (mousecap) 1774 init_mouse(); 1775 } 1776 init_done = 1; 1777 if (top_scroll) 1778 { 1779 int i; 1780 1781 /* 1782 * This is nice to terminals with no alternate screen, 1783 * but with saved scrolled-off-the-top lines. This way, 1784 * no previous line is lost, but we start with a whole 1785 * screen to ourself. 1786 */ 1787 for (i = 1; i < sc_height; i++) 1788 putchr('\n'); 1789 } else 1790 line_left(); 1791 #else 1792 #if MSDOS_COMPILER==WIN32C 1793 if (!(quit_if_one_screen && one_screen)) 1794 { 1795 if (!no_init) 1796 { 1797 win32_init_term(); 1798 term_init_done = 1; 1799 } 1800 if (mousecap) 1801 init_mouse(); 1802 1803 } 1804 win32_init_vt_term(); 1805 #endif 1806 init_done = 1; 1807 initcolor(); 1808 flush(); 1809 #endif 1810 } 1811 1812 /* 1813 * Deinitialize terminal 1814 */ 1815 public void deinit(void) 1816 { 1817 if (!init_done) 1818 return; 1819 #if !MSDOS_COMPILER 1820 if (!(quit_if_one_screen && one_screen)) 1821 { 1822 if (mousecap) 1823 deinit_mouse(); 1824 if (!no_keypad) 1825 ltputs(sc_e_keypad, sc_height, putchr); 1826 if (!no_init) 1827 ltputs(sc_deinit, sc_height, putchr); 1828 } 1829 #else 1830 /* Restore system colors. */ 1831 SETCOLORS(sy_fg_color, sy_bg_color); 1832 #if MSDOS_COMPILER==WIN32C 1833 win32_deinit_vt_term(); 1834 if (!(quit_if_one_screen && one_screen)) 1835 { 1836 if (mousecap) 1837 deinit_mouse(); 1838 if (!no_init) 1839 win32_deinit_term(); 1840 } 1841 #else 1842 /* Need clreol to make SETCOLORS take effect. */ 1843 clreol(); 1844 #endif 1845 #endif 1846 init_done = 0; 1847 } 1848 1849 /* 1850 * Are we interactive (ie. writing to an initialized tty)? 1851 */ 1852 public int interactive(void) 1853 { 1854 return (is_tty && init_done); 1855 } 1856 1857 static void assert_interactive(void) 1858 { 1859 if (interactive()) return; 1860 /* abort(); */ 1861 } 1862 1863 /* 1864 * Home cursor (move to upper left corner of screen). 1865 */ 1866 public void home(void) 1867 { 1868 assert_interactive(); 1869 #if !MSDOS_COMPILER 1870 ltputs(sc_home, 1, putchr); 1871 #else 1872 flush(); 1873 _settextposition(1,1); 1874 #endif 1875 } 1876 1877 #if LESSTEST 1878 public void dump_screen(void) 1879 { 1880 char dump_cmd[32]; 1881 SNPRINTF1(dump_cmd, sizeof(dump_cmd), ESCS"0;0;%dR", sc_width * sc_height); 1882 ltputs(dump_cmd, sc_height, putchr); 1883 flush(); 1884 } 1885 #endif /*LESSTEST*/ 1886 1887 /* 1888 * Add a blank line (called with cursor at home). 1889 * Should scroll the display down. 1890 */ 1891 public void add_line(void) 1892 { 1893 assert_interactive(); 1894 #if !MSDOS_COMPILER 1895 ltputs(sc_addline, sc_height, putchr); 1896 #else 1897 flush(); 1898 #if MSDOS_COMPILER==MSOFTC 1899 _scrolltextwindow(_GSCROLLDOWN); 1900 _settextposition(1,1); 1901 #else 1902 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 1903 movetext(1,1, sc_width,sc_height-1, 1,2); 1904 gotoxy(1,1); 1905 clreol(); 1906 #else 1907 #if MSDOS_COMPILER==WIN32C 1908 { 1909 CHAR_INFO fillchar; 1910 SMALL_RECT rcSrc, rcClip; 1911 COORD new_org; 1912 CONSOLE_SCREEN_BUFFER_INFO csbi; 1913 1914 GetConsoleScreenBufferInfo(con_out,&csbi); 1915 1916 /* The clip rectangle is the entire visible screen. */ 1917 rcClip.Left = csbi.srWindow.Left; 1918 rcClip.Top = csbi.srWindow.Top; 1919 rcClip.Right = csbi.srWindow.Right; 1920 rcClip.Bottom = csbi.srWindow.Bottom; 1921 1922 /* The source rectangle is the visible screen minus the last line. */ 1923 rcSrc = rcClip; 1924 rcSrc.Bottom--; 1925 1926 /* Move the top left corner of the source window down one row. */ 1927 new_org.X = rcSrc.Left; 1928 new_org.Y = rcSrc.Top + 1; 1929 1930 /* Fill the right character and attributes. */ 1931 fillchar.Char.AsciiChar = ' '; 1932 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 1933 fillchar.Attributes = curr_attr; 1934 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); 1935 _settextposition(1,1); 1936 } 1937 #endif 1938 #endif 1939 #endif 1940 #endif 1941 } 1942 1943 #if 0 1944 /* 1945 * Remove the n topmost lines and scroll everything below it in the 1946 * window upward. This is needed to stop leaking the topmost line 1947 * into the scrollback buffer when we go down-one-line (in WIN32). 1948 */ 1949 public void remove_top(int n) 1950 { 1951 #if MSDOS_COMPILER==WIN32C 1952 SMALL_RECT rcSrc, rcClip; 1953 CHAR_INFO fillchar; 1954 COORD new_org; 1955 CONSOLE_SCREEN_BUFFER_INFO csbi; /* to get buffer info */ 1956 1957 if (n >= sc_height - 1) 1958 { 1959 clear(); 1960 home(); 1961 return; 1962 } 1963 1964 flush(); 1965 1966 GetConsoleScreenBufferInfo(con_out, &csbi); 1967 1968 /* Get the extent of all-visible-rows-but-the-last. */ 1969 rcSrc.Left = csbi.srWindow.Left; 1970 rcSrc.Top = csbi.srWindow.Top + n; 1971 rcSrc.Right = csbi.srWindow.Right; 1972 rcSrc.Bottom = csbi.srWindow.Bottom; 1973 1974 /* Get the clip rectangle. */ 1975 rcClip.Left = rcSrc.Left; 1976 rcClip.Top = csbi.srWindow.Top; 1977 rcClip.Right = rcSrc.Right; 1978 rcClip.Bottom = rcSrc.Bottom ; 1979 1980 /* Move the source window up n rows. */ 1981 new_org.X = rcSrc.Left; 1982 new_org.Y = rcSrc.Top - n; 1983 1984 /* Fill the right character and attributes. */ 1985 fillchar.Char.AsciiChar = ' '; 1986 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 1987 fillchar.Attributes = curr_attr; 1988 1989 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); 1990 1991 /* Position cursor on first blank line. */ 1992 goto_line(sc_height - n - 1); 1993 #endif 1994 } 1995 #endif 1996 1997 #if MSDOS_COMPILER==WIN32C 1998 /* 1999 * Clear the screen. 2000 */ 2001 static void win32_clear(void) 2002 { 2003 /* 2004 * This will clear only the currently visible rows of the NT 2005 * console buffer, which means none of the precious scrollback 2006 * rows are touched making for faster scrolling. Note that, if 2007 * the window has fewer columns than the console buffer (i.e. 2008 * there is a horizontal scrollbar as well), the entire width 2009 * of the visible rows will be cleared. 2010 */ 2011 COORD topleft; 2012 DWORD nchars; 2013 DWORD winsz; 2014 CONSOLE_SCREEN_BUFFER_INFO csbi; 2015 2016 /* get the number of cells in the current buffer */ 2017 GetConsoleScreenBufferInfo(con_out, &csbi); 2018 winsz = csbi.dwSize.X * (csbi.srWindow.Bottom - csbi.srWindow.Top + 1); 2019 topleft.X = 0; 2020 topleft.Y = csbi.srWindow.Top; 2021 2022 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 2023 FillConsoleOutputCharacter(con_out, ' ', winsz, topleft, &nchars); 2024 FillConsoleOutputAttribute(con_out, curr_attr, winsz, topleft, &nchars); 2025 } 2026 2027 /* 2028 * Remove the n topmost lines and scroll everything below it in the 2029 * window upward. 2030 */ 2031 public void win32_scroll_up(int n) 2032 { 2033 SMALL_RECT rcSrc, rcClip; 2034 CHAR_INFO fillchar; 2035 COORD topleft; 2036 COORD new_org; 2037 DWORD nchars; 2038 DWORD size; 2039 CONSOLE_SCREEN_BUFFER_INFO csbi; 2040 2041 if (n <= 0) 2042 return; 2043 2044 if (n >= sc_height - 1) 2045 { 2046 win32_clear(); 2047 _settextposition(1,1); 2048 return; 2049 } 2050 2051 /* Get the extent of what will remain visible after scrolling. */ 2052 GetConsoleScreenBufferInfo(con_out, &csbi); 2053 rcSrc.Left = csbi.srWindow.Left; 2054 rcSrc.Top = csbi.srWindow.Top + n; 2055 rcSrc.Right = csbi.srWindow.Right; 2056 rcSrc.Bottom = csbi.srWindow.Bottom; 2057 2058 /* Get the clip rectangle. */ 2059 rcClip.Left = rcSrc.Left; 2060 rcClip.Top = csbi.srWindow.Top; 2061 rcClip.Right = rcSrc.Right; 2062 rcClip.Bottom = rcSrc.Bottom ; 2063 2064 /* Move the source text to the top of the screen. */ 2065 new_org.X = rcSrc.Left; 2066 new_org.Y = rcClip.Top; 2067 2068 /* Fill the right character and attributes. */ 2069 fillchar.Char.AsciiChar = ' '; 2070 fillchar.Attributes = MAKEATTR(nm_fg_color, nm_bg_color); 2071 2072 /* Scroll the window. */ 2073 SetConsoleTextAttribute(con_out, fillchar.Attributes); 2074 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar); 2075 2076 /* Clear remaining lines at bottom. */ 2077 topleft.X = csbi.dwCursorPosition.X; 2078 topleft.Y = rcSrc.Bottom - n; 2079 size = (n * csbi.dwSize.X) + (rcSrc.Right - topleft.X); 2080 FillConsoleOutputCharacter(con_out, ' ', size, topleft, 2081 &nchars); 2082 FillConsoleOutputAttribute(con_out, fillchar.Attributes, size, topleft, 2083 &nchars); 2084 SetConsoleTextAttribute(con_out, curr_attr); 2085 2086 /* Move cursor n lines up from where it was. */ 2087 csbi.dwCursorPosition.Y -= n; 2088 SetConsoleCursorPosition(con_out, csbi.dwCursorPosition); 2089 } 2090 #endif 2091 2092 /* 2093 * Move cursor to lower left corner of screen. 2094 */ 2095 public void lower_left(void) 2096 { 2097 assert_interactive(); 2098 #if !MSDOS_COMPILER 2099 ltputs(sc_lower_left, 1, putchr); 2100 #else 2101 flush(); 2102 _settextposition(sc_height, 1); 2103 #endif 2104 } 2105 2106 /* 2107 * Move cursor to left position of current line. 2108 */ 2109 public void line_left(void) 2110 { 2111 assert_interactive(); 2112 #if !MSDOS_COMPILER 2113 ltputs(sc_return, 1, putchr); 2114 #else 2115 { 2116 int row; 2117 flush(); 2118 #if MSDOS_COMPILER==WIN32C 2119 { 2120 CONSOLE_SCREEN_BUFFER_INFO scr; 2121 GetConsoleScreenBufferInfo(con_out, &scr); 2122 row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1; 2123 } 2124 #else 2125 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 2126 row = wherey(); 2127 #else 2128 { 2129 struct rccoord tpos = _gettextposition(); 2130 row = tpos.row; 2131 } 2132 #endif 2133 #endif 2134 _settextposition(row, 1); 2135 } 2136 #endif 2137 } 2138 2139 /* 2140 * Check if the console size has changed and reset internals 2141 * (in lieu of SIGWINCH for WIN32). 2142 */ 2143 public void check_winch(void) 2144 { 2145 #if MSDOS_COMPILER==WIN32C 2146 CONSOLE_SCREEN_BUFFER_INFO scr; 2147 COORD size; 2148 2149 if (con_out == INVALID_HANDLE_VALUE) 2150 return; 2151 2152 flush(); 2153 GetConsoleScreenBufferInfo(con_out, &scr); 2154 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1; 2155 size.X = scr.srWindow.Right - scr.srWindow.Left + 1; 2156 if (size.Y != sc_height || size.X != sc_width) 2157 { 2158 sc_height = size.Y; 2159 sc_width = size.X; 2160 if (!no_init && con_out_ours == con_out) 2161 SetConsoleScreenBufferSize(con_out, size); 2162 pos_init(); 2163 wscroll = (sc_height + 1) / 2; 2164 screen_trashed(); 2165 } 2166 #endif 2167 } 2168 2169 /* 2170 * Goto a specific line on the screen. 2171 */ 2172 public void goto_line(int sindex) 2173 { 2174 assert_interactive(); 2175 #if !MSDOS_COMPILER 2176 ltputs(tgoto(sc_move, 0, sindex), 1, putchr); 2177 #else 2178 flush(); 2179 _settextposition(sindex+1, 1); 2180 #endif 2181 } 2182 2183 #if MSDOS_COMPILER==MSOFTC || MSDOS_COMPILER==BORLANDC 2184 /* 2185 * Create an alternate screen which is all white. 2186 * This screen is used to create a "flash" effect, by displaying it 2187 * briefly and then switching back to the normal screen. 2188 * {{ Yuck! There must be a better way to get a visual bell. }} 2189 */ 2190 static void create_flash(void) 2191 { 2192 #if MSDOS_COMPILER==MSOFTC 2193 struct videoconfig w; 2194 char *blanks; 2195 int row, col; 2196 2197 _getvideoconfig(&w); 2198 videopages = w.numvideopages; 2199 if (videopages < 2) 2200 { 2201 at_enter(AT_STANDOUT); 2202 at_exit(); 2203 } else 2204 { 2205 _setactivepage(1); 2206 at_enter(AT_STANDOUT); 2207 blanks = (char *) ecalloc(w.numtextcols, sizeof(char)); 2208 for (col = 0; col < w.numtextcols; col++) 2209 blanks[col] = ' '; 2210 for (row = w.numtextrows; row > 0; row--) 2211 _outmem(blanks, w.numtextcols); 2212 _setactivepage(0); 2213 _setvisualpage(0); 2214 free(blanks); 2215 at_exit(); 2216 } 2217 #else 2218 #if MSDOS_COMPILER==BORLANDC 2219 int n; 2220 2221 whitescreen = (unsigned short *) 2222 malloc(sc_width * sc_height * sizeof(short)); 2223 if (whitescreen == NULL) 2224 return; 2225 for (n = 0; n < sc_width * sc_height; n++) 2226 whitescreen[n] = 0x7020; 2227 #endif 2228 #endif 2229 flash_created = 1; 2230 } 2231 #endif /* MSDOS_COMPILER */ 2232 2233 /* 2234 * Output the "visual bell", if there is one. 2235 */ 2236 public void vbell(void) 2237 { 2238 if (no_vbell) 2239 return; 2240 #if !MSDOS_COMPILER 2241 if (*sc_visual_bell == '\0') 2242 return; 2243 ltputs(sc_visual_bell, sc_height, putchr); 2244 #else 2245 #if MSDOS_COMPILER==DJGPPC 2246 ScreenVisualBell(); 2247 #else 2248 #if MSDOS_COMPILER==MSOFTC 2249 /* 2250 * Create a flash screen on the second video page. 2251 * Switch to that page, then switch back. 2252 */ 2253 if (!flash_created) 2254 create_flash(); 2255 if (videopages < 2) 2256 return; 2257 _setvisualpage(1); 2258 delay(100); 2259 _setvisualpage(0); 2260 #else 2261 #if MSDOS_COMPILER==BORLANDC 2262 unsigned short *currscreen; 2263 2264 /* 2265 * Get a copy of the current screen. 2266 * Display the flash screen. 2267 * Then restore the old screen. 2268 */ 2269 if (!flash_created) 2270 create_flash(); 2271 if (whitescreen == NULL) 2272 return; 2273 currscreen = (unsigned short *) 2274 malloc(sc_width * sc_height * sizeof(short)); 2275 if (currscreen == NULL) return; 2276 gettext(1, 1, sc_width, sc_height, currscreen); 2277 puttext(1, 1, sc_width, sc_height, whitescreen); 2278 delay(100); 2279 puttext(1, 1, sc_width, sc_height, currscreen); 2280 free(currscreen); 2281 #else 2282 #if MSDOS_COMPILER==WIN32C 2283 /* paint screen with an inverse color */ 2284 clear(); 2285 2286 /* leave it displayed for 100 msec. */ 2287 Sleep(100); 2288 2289 /* restore with a redraw */ 2290 repaint(); 2291 #endif 2292 #endif 2293 #endif 2294 #endif 2295 #endif 2296 } 2297 2298 /* 2299 * Make a noise. 2300 */ 2301 static void beep(void) 2302 { 2303 #if !MSDOS_COMPILER 2304 putchr(CONTROL('G')); 2305 #else 2306 #if MSDOS_COMPILER==WIN32C 2307 MessageBeep(0); 2308 #else 2309 write(1, "\7", 1); 2310 #endif 2311 #endif 2312 } 2313 2314 /* 2315 * Ring the terminal bell. 2316 */ 2317 public void bell(void) 2318 { 2319 if (quiet == VERY_QUIET) 2320 vbell(); 2321 else 2322 beep(); 2323 } 2324 2325 /* 2326 * Clear the screen. 2327 */ 2328 public void clear(void) 2329 { 2330 assert_interactive(); 2331 #if !MSDOS_COMPILER 2332 ltputs(sc_clear, sc_height, putchr); 2333 #else 2334 flush(); 2335 #if MSDOS_COMPILER==WIN32C 2336 win32_clear(); 2337 #else 2338 _clearscreen(_GCLEARSCREEN); 2339 #endif 2340 #endif 2341 } 2342 2343 /* 2344 * Clear from the cursor to the end of the cursor's line. 2345 * {{ This must not move the cursor. }} 2346 */ 2347 public void clear_eol(void) 2348 { 2349 /* assert_interactive();*/ 2350 #if !MSDOS_COMPILER 2351 ltputs(sc_eol_clear, 1, putchr); 2352 #else 2353 #if MSDOS_COMPILER==MSOFTC 2354 short top, left; 2355 short bot, right; 2356 struct rccoord tpos; 2357 2358 flush(); 2359 /* 2360 * Save current state. 2361 */ 2362 tpos = _gettextposition(); 2363 _gettextwindow(&top, &left, &bot, &right); 2364 /* 2365 * Set a temporary window to the current line, 2366 * from the cursor's position to the right edge of the screen. 2367 * Then clear that window. 2368 */ 2369 _settextwindow(tpos.row, tpos.col, tpos.row, sc_width); 2370 _clearscreen(_GWINDOW); 2371 /* 2372 * Restore state. 2373 */ 2374 _settextwindow(top, left, bot, right); 2375 _settextposition(tpos.row, tpos.col); 2376 #else 2377 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 2378 flush(); 2379 clreol(); 2380 #else 2381 #if MSDOS_COMPILER==WIN32C 2382 DWORD nchars; 2383 COORD cpos; 2384 CONSOLE_SCREEN_BUFFER_INFO scr; 2385 2386 flush(); 2387 memset(&scr, 0, sizeof(scr)); 2388 GetConsoleScreenBufferInfo(con_out, &scr); 2389 cpos.X = scr.dwCursorPosition.X; 2390 cpos.Y = scr.dwCursorPosition.Y; 2391 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color); 2392 FillConsoleOutputAttribute(con_out, curr_attr, 2393 scr.dwSize.X - cpos.X, cpos, &nchars); 2394 FillConsoleOutputCharacter(con_out, ' ', 2395 scr.dwSize.X - cpos.X, cpos, &nchars); 2396 #endif 2397 #endif 2398 #endif 2399 #endif 2400 } 2401 2402 /* 2403 * Clear the current line. 2404 * Clear the screen if there's off-screen memory below the display. 2405 */ 2406 static void clear_eol_bot(void) 2407 { 2408 assert_interactive(); 2409 #if MSDOS_COMPILER 2410 clear_eol(); 2411 #else 2412 if (below_mem) 2413 ltputs(sc_eos_clear, 1, putchr); 2414 else 2415 ltputs(sc_eol_clear, 1, putchr); 2416 #endif 2417 } 2418 2419 /* 2420 * Clear the bottom line of the display. 2421 * Leave the cursor at the beginning of the bottom line. 2422 */ 2423 public void clear_bot(void) 2424 { 2425 /* 2426 * If we're in a non-normal attribute mode, temporarily exit 2427 * the mode while we do the clear. Some terminals fill the 2428 * cleared area with the current attribute. 2429 */ 2430 if (oldbot) 2431 lower_left(); 2432 else 2433 line_left(); 2434 2435 if (attrmode == AT_NORMAL) 2436 clear_eol_bot(); 2437 else 2438 { 2439 int saved_attrmode = attrmode; 2440 2441 at_exit(); 2442 clear_eol_bot(); 2443 at_enter(saved_attrmode); 2444 } 2445 } 2446 2447 /* 2448 * Color string may be "x[y]" where x and y are 4-bit color chars, 2449 * or "N[.M]" where N and M are decimal integers> 2450 * Any of x,y,N,M may also be "-" to mean "unchanged". 2451 */ 2452 2453 /* 2454 * Parse a 4-bit color char. 2455 */ 2456 static int parse_color4(char ch) 2457 { 2458 switch (ch) 2459 { 2460 case 'k': return 0; 2461 case 'r': return CV_RED; 2462 case 'g': return CV_GREEN; 2463 case 'y': return CV_RED|CV_GREEN; 2464 case 'b': return CV_BLUE; 2465 case 'm': return CV_RED|CV_BLUE; 2466 case 'c': return CV_GREEN|CV_BLUE; 2467 case 'w': return CV_RED|CV_GREEN|CV_BLUE; 2468 case 'K': return 0|CV_BRIGHT; 2469 case 'R': return CV_RED|CV_BRIGHT; 2470 case 'G': return CV_GREEN|CV_BRIGHT; 2471 case 'Y': return CV_RED|CV_GREEN|CV_BRIGHT; 2472 case 'B': return CV_BLUE|CV_BRIGHT; 2473 case 'M': return CV_RED|CV_BLUE|CV_BRIGHT; 2474 case 'C': return CV_GREEN|CV_BLUE|CV_BRIGHT; 2475 case 'W': return CV_RED|CV_GREEN|CV_BLUE|CV_BRIGHT; 2476 case '-': return CV_NOCHANGE; 2477 default: return CV_ERROR; 2478 } 2479 } 2480 2481 /* 2482 * Parse a color as a decimal integer. 2483 */ 2484 static int parse_color6(constant char **ps) 2485 { 2486 if (**ps == '-') 2487 { 2488 (*ps)++; 2489 return CV_NOCHANGE; 2490 } else 2491 { 2492 constant char *os = *ps; 2493 int color = lstrtoic(os, ps, 10); 2494 if (color < 0 || *ps == os) 2495 return CV_ERROR; 2496 return color; 2497 } 2498 } 2499 2500 /* 2501 * Parse a color pair and return the foreground/background/attribute values. 2502 * Return type of color specifier: 2503 * CV_4BIT: fg/bg values are OR of CV_{RGB} bits. 2504 * CV_6BIT: fg/bg values are integers entered by user. 2505 */ 2506 public COLOR_TYPE parse_color(constant char *str, mutable int *p_fg, mutable int *p_bg, mutable CHAR_ATTR *p_cattr) 2507 { 2508 int fg; 2509 int bg = CV_ERROR; 2510 CHAR_ATTR cattr = CATTR_NULL; 2511 COLOR_TYPE type = CT_NULL; 2512 2513 if (str == NULL || *str == '\0') 2514 return CT_NULL; 2515 if (*str == '+') 2516 str++; /* ignore leading + */ 2517 2518 fg = parse_color4(*str); 2519 if (fg != CV_ERROR) 2520 { 2521 if (str[1] == '\0' || strchr("*~_&dsul", str[1]) != NULL) 2522 { 2523 bg = CV_NOCHANGE; 2524 str++; /* skip the fg char */ 2525 } else 2526 { 2527 bg = parse_color4(str[1]); 2528 if (bg != CV_ERROR) 2529 str += 2; /* skip both fg and bg chars */ 2530 } 2531 } 2532 if (fg != CV_ERROR && bg != CV_ERROR) 2533 type = CT_4BIT; 2534 else 2535 { 2536 fg = (*str == '.') ? CV_NOCHANGE : parse_color6(&str); 2537 if (fg != CV_ERROR) 2538 { 2539 if (*str != '.') 2540 bg = CV_NOCHANGE; 2541 else 2542 { 2543 str++; /* skip the dot */ 2544 bg = parse_color6(&str); 2545 } 2546 } 2547 if (fg != CV_ERROR && bg != CV_ERROR) 2548 type = CT_6BIT; 2549 } 2550 if (type != CT_NULL) 2551 { 2552 for (;; str++) 2553 { 2554 if (*str == '*' || *str == 'd') 2555 cattr |= CATTR_BOLD; 2556 else if (*str == '~' || *str == 's') 2557 cattr |= CATTR_STANDOUT; 2558 else if (*str == '_' || *str == 'u') 2559 cattr |= CATTR_UNDERLINE; 2560 else if (*str == '&' || *str == 'l') /* can't use 'k' because of conflict with "black" */ 2561 cattr |= CATTR_BLINK; 2562 else 2563 break; 2564 } 2565 if (p_fg != NULL) *p_fg = fg; 2566 if (p_bg != NULL) *p_bg = bg; 2567 if (p_cattr != NULL) *p_cattr = cattr; 2568 } 2569 return type; 2570 } 2571 2572 #if !MSDOS_COMPILER 2573 2574 static int sgr_color(int color) 2575 { 2576 switch (color) 2577 { 2578 case 0: return 30; 2579 case CV_RED: return 31; 2580 case CV_GREEN: return 32; 2581 case CV_RED|CV_GREEN: return 33; 2582 case CV_BLUE: return 34; 2583 case CV_RED|CV_BLUE: return 35; 2584 case CV_GREEN|CV_BLUE: return 36; 2585 case CV_RED|CV_GREEN|CV_BLUE: return 37; 2586 2587 case CV_BRIGHT: return 90; 2588 case CV_RED|CV_BRIGHT: return 91; 2589 case CV_GREEN|CV_BRIGHT: return 92; 2590 case CV_RED|CV_GREEN|CV_BRIGHT: return 93; 2591 case CV_BLUE|CV_BRIGHT: return 94; 2592 case CV_RED|CV_BLUE|CV_BRIGHT: return 95; 2593 case CV_GREEN|CV_BLUE|CV_BRIGHT: return 96; 2594 case CV_RED|CV_GREEN|CV_BLUE|CV_BRIGHT: return 97; 2595 2596 default: return color; 2597 } 2598 } 2599 2600 static void tput_fmt(constant char *fmt, int color, int (*f_putc)(int)) 2601 { 2602 char buf[INT_STRLEN_BOUND(int)+16]; 2603 if (color == attrcolor) 2604 return; 2605 SNPRINTF1(buf, sizeof(buf), fmt, color); 2606 ltputs(buf, 1, f_putc); 2607 attrcolor = color; 2608 } 2609 2610 static void tput_char_cattr(CHAR_ATTR cattr, int (*f_putc)(int)) 2611 { 2612 if (cattr & CATTR_UNDERLINE) 2613 ltputs(sc_u_in, 1, f_putc); 2614 if (cattr & CATTR_BOLD) 2615 ltputs(sc_b_in, 1, f_putc); 2616 if (cattr & CATTR_BLINK) 2617 ltputs(sc_bl_in, 1, f_putc); 2618 if (cattr & CATTR_STANDOUT) 2619 ltputs(sc_s_in, 1, f_putc); 2620 } 2621 2622 static void tput_color(constant char *str, int (*f_putc)(int)) 2623 { 2624 int fg; 2625 int bg; 2626 CHAR_ATTR cattr; 2627 2628 if (str != NULL && strcmp(str, "*") == 0) 2629 { 2630 /* Special case: reset to normal */ 2631 tput_fmt(ESCS"[m", -1, f_putc); 2632 return; 2633 } 2634 switch (parse_color(str, &fg, &bg, &cattr)) 2635 { 2636 case CT_4BIT: 2637 if (fg >= 0) 2638 tput_fmt(ESCS"[%dm", sgr_color(fg), f_putc); 2639 if (bg >= 0) 2640 tput_fmt(ESCS"[%dm", sgr_color(bg)+10, f_putc); 2641 tput_char_cattr(cattr, f_putc); 2642 break; 2643 case CT_6BIT: 2644 if (fg >= 0) 2645 tput_fmt(ESCS"[38;5;%dm", fg, f_putc); 2646 if (bg >= 0) 2647 tput_fmt(ESCS"[48;5;%dm", bg, f_putc); 2648 tput_char_cattr(cattr, f_putc); 2649 break; 2650 default: 2651 break; 2652 } 2653 } 2654 2655 static void tput_inmode(constant char *mode_str, int attr, int attr_bit, int (*f_putc)(int)) 2656 { 2657 constant char *color_str; 2658 if ((attr & attr_bit) == 0) 2659 return; 2660 color_str = get_color_map(attr_bit); 2661 if (color_str == NULL || *color_str == '\0' || *color_str == '+') 2662 { 2663 ltputs(mode_str, 1, f_putc); 2664 if (color_str == NULL || *color_str++ != '+') 2665 return; 2666 } 2667 /* Color overrides mode string */ 2668 tput_color(color_str, f_putc); 2669 } 2670 2671 static void tput_outmode(constant char *mode_str, int attr_bit, int (*f_putc)(int)) 2672 { 2673 if ((attrmode & attr_bit) == 0) 2674 return; 2675 ltputs(mode_str, 1, f_putc); 2676 } 2677 2678 #else /* MSDOS_COMPILER */ 2679 2680 #if MSDOS_COMPILER==WIN32C 2681 static lbool WIN32put_fmt(constant char *fmt, int color) 2682 { 2683 char buf[INT_STRLEN_BOUND(int)+16]; 2684 int len = (size_t) SNPRINTF1(buf, sizeof(buf), fmt, color); 2685 if (len > 0) 2686 WIN32textout(buf, (size_t) len); 2687 return TRUE; 2688 } 2689 2690 static void win_set_cattr(CHAR_ATTR cattr) 2691 { 2692 if (cattr & CATTR_UNDERLINE) 2693 WIN32textout(ESCS"[4m", 4); 2694 if (cattr & CATTR_BOLD) 2695 WIN32textout(ESCS"[1m", 4); 2696 if (cattr & CATTR_BLINK) 2697 WIN32textout(ESCS"[5m", 4); 2698 if (cattr & CATTR_STANDOUT) 2699 WIN32textout(ESCS"[7m", 4); 2700 } 2701 #endif 2702 2703 static lbool win_set_color(int attr) 2704 { 2705 int fg; 2706 int bg; 2707 CHAR_ATTR cattr; 2708 lbool out = FALSE; 2709 constant char *str = get_color_map(attr); 2710 if (str == NULL || str[0] == '\0') 2711 return FALSE; 2712 switch (parse_color(str, &fg, &bg, &cattr)) 2713 { 2714 case CT_4BIT: 2715 if (fg >= 0 && bg >= 0) 2716 { 2717 SETCOLORS(fg, bg); 2718 out = TRUE; 2719 } else if (fg >= 0) 2720 { 2721 SET_FG_COLOR(fg); 2722 out = TRUE; 2723 } else if (bg >= 0) 2724 { 2725 SET_BG_COLOR(bg); 2726 out = TRUE; 2727 } 2728 #if MSDOS_COMPILER==WIN32C 2729 if (vt_enabled) 2730 win_set_cattr(cattr); 2731 #endif 2732 break; 2733 #if MSDOS_COMPILER==WIN32C 2734 case CT_6BIT: 2735 if (vt_enabled) 2736 { 2737 if (fg > 0) 2738 out = WIN32put_fmt(ESCS"[38;5;%dm", fg); 2739 if (bg > 0) 2740 out = WIN32put_fmt(ESCS"[48;5;%dm", bg); 2741 win_set_cattr(cattr); 2742 } 2743 break; 2744 #endif 2745 default: 2746 break; 2747 } 2748 return out; 2749 } 2750 2751 #endif /* MSDOS_COMPILER */ 2752 2753 public void at_enter(int attr) 2754 { 2755 attr = apply_at_specials(attr); 2756 #if !MSDOS_COMPILER 2757 /* The one with the most priority is last. */ 2758 tput_inmode(sc_u_in, attr, AT_UNDERLINE, putchr); 2759 tput_inmode(sc_b_in, attr, AT_BOLD, putchr); 2760 tput_inmode(sc_bl_in, attr, AT_BLINK, putchr); 2761 /* Don't use standout and color at the same time. */ 2762 if (use_color && (attr & AT_COLOR)) 2763 tput_color(get_color_map(attr), putchr); 2764 else 2765 tput_inmode(sc_s_in, attr, AT_STANDOUT, putchr); 2766 #else 2767 flush(); 2768 /* The one with the most priority is first. */ 2769 if ((attr & AT_COLOR) && use_color) 2770 { 2771 win_set_color(attr); 2772 } else if (attr & AT_STANDOUT) 2773 { 2774 SETCOLORS(so_fg_color, so_bg_color); 2775 } else if (attr & AT_BLINK) 2776 { 2777 SETCOLORS(bl_fg_color, bl_bg_color); 2778 } else if (attr & AT_BOLD) 2779 { 2780 SETCOLORS(bo_fg_color, bo_bg_color); 2781 } else if (attr & AT_UNDERLINE) 2782 { 2783 SETCOLORS(ul_fg_color, ul_bg_color); 2784 } 2785 #endif 2786 attrmode = attr; 2787 } 2788 2789 public void at_exit(void) 2790 { 2791 #if !MSDOS_COMPILER 2792 /* Undo things in the reverse order we did them. */ 2793 tput_color("*", putchr); 2794 tput_outmode(sc_s_out, AT_STANDOUT, putchr); 2795 tput_outmode(sc_bl_out, AT_BLINK, putchr); 2796 tput_outmode(sc_b_out, AT_BOLD, putchr); 2797 tput_outmode(sc_u_out, AT_UNDERLINE, putchr); 2798 #else 2799 flush(); 2800 SETCOLORS(nm_fg_color, nm_bg_color); 2801 #endif 2802 attrmode = AT_NORMAL; 2803 } 2804 2805 public void at_switch(int attr) 2806 { 2807 int new_attrmode = apply_at_specials(attr); 2808 int ignore_modes = AT_ANSI; 2809 2810 if ((new_attrmode & ~ignore_modes) != (attrmode & ~ignore_modes)) 2811 { 2812 at_exit(); 2813 at_enter(attr); 2814 } 2815 } 2816 2817 public lbool is_at_equiv(int attr1, int attr2) 2818 { 2819 attr1 = apply_at_specials(attr1); 2820 attr2 = apply_at_specials(attr2); 2821 2822 return (attr1 == attr2); 2823 } 2824 2825 public int apply_at_specials(int attr) 2826 { 2827 if (attr & AT_BINARY) 2828 attr |= binattr; 2829 if (attr & AT_HILITE) 2830 attr |= AT_STANDOUT; 2831 attr &= ~(AT_BINARY|AT_HILITE); 2832 2833 return attr; 2834 } 2835 2836 /* 2837 * Output a plain backspace, without erasing the previous char. 2838 */ 2839 public void putbs(void) 2840 { 2841 if (termcap_debug) 2842 putstr("<bs>"); 2843 else 2844 { 2845 #if !MSDOS_COMPILER 2846 ltputs(sc_backspace, 1, putchr); 2847 #else 2848 int row, col; 2849 2850 flush(); 2851 { 2852 #if MSDOS_COMPILER==MSOFTC 2853 struct rccoord tpos; 2854 tpos = _gettextposition(); 2855 row = tpos.row; 2856 col = tpos.col; 2857 #else 2858 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC 2859 row = wherey(); 2860 col = wherex(); 2861 #else 2862 #if MSDOS_COMPILER==WIN32C 2863 CONSOLE_SCREEN_BUFFER_INFO scr; 2864 GetConsoleScreenBufferInfo(con_out, &scr); 2865 row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1; 2866 col = scr.dwCursorPosition.X - scr.srWindow.Left + 1; 2867 #endif 2868 #endif 2869 #endif 2870 } 2871 if (col <= 1) 2872 return; 2873 _settextposition(row, col-1); 2874 #endif /* MSDOS_COMPILER */ 2875 } 2876 } 2877 2878 #if MSDOS_COMPILER==WIN32C 2879 2880 #define WIN32_MAX_REPEAT 3 2881 #define LAST_DOWN_COUNT 8 2882 static LWCHAR last_downs[LAST_DOWN_COUNT] = { 0 }; 2883 static int last_down_index = 0; 2884 static LWCHAR hi_surr = 0; 2885 2886 typedef struct XINPUT_RECORD { 2887 INPUT_RECORD ir; 2888 LWCHAR ichar; /* because ir...UnicodeChar is only 16 bits */ 2889 } XINPUT_RECORD; 2890 2891 typedef struct WIN32_CHAR { 2892 struct WIN32_CHAR *wc_next; 2893 char wc_ch; 2894 } WIN32_CHAR; 2895 2896 static WIN32_CHAR *win32_queue = NULL; 2897 2898 /* 2899 * Is the win32_queue nonempty? 2900 */ 2901 static int win32_queued_char(void) 2902 { 2903 return (win32_queue != NULL); 2904 } 2905 2906 /* 2907 * Push a char onto the back of the win32_queue. 2908 */ 2909 static void win32_enqueue(char ch) 2910 { 2911 WIN32_CHAR *wch = (WIN32_CHAR *) ecalloc(1, sizeof(WIN32_CHAR)); 2912 wch->wc_ch = ch; 2913 wch->wc_next = NULL; 2914 if (win32_queue == NULL) 2915 win32_queue = wch; 2916 else 2917 { 2918 WIN32_CHAR *pch; 2919 for (pch = win32_queue; pch->wc_next != NULL; pch = pch->wc_next) 2920 continue; 2921 pch->wc_next = wch; 2922 } 2923 } 2924 2925 /* 2926 * Push a char onto the front of the win32_queue. 2927 * Makes the next call to WIN32getch return ch. 2928 */ 2929 public void WIN32ungetch(int ch) 2930 { 2931 WIN32_CHAR *wch = (WIN32_CHAR *) ecalloc(1, sizeof(WIN32_CHAR)); 2932 wch->wc_ch = ch; 2933 wch->wc_next = win32_queue; 2934 win32_queue = wch; 2935 } 2936 2937 /* 2938 * Get a char from the front of the win32_queue. 2939 */ 2940 static char win32_get_queue(void) 2941 { 2942 WIN32_CHAR *wch = win32_queue; 2943 char ch = wch->wc_ch; 2944 win32_queue = wch->wc_next; 2945 free(wch); 2946 return ch; 2947 } 2948 2949 /* 2950 * Handle a mouse input event. 2951 */ 2952 static lbool win32_mouse_event(XINPUT_RECORD *xip) 2953 { 2954 char b; 2955 2956 if (!mousecap || xip->ir.EventType != MOUSE_EVENT || 2957 xip->ir.Event.MouseEvent.dwEventFlags == MOUSE_MOVED) 2958 return (FALSE); 2959 2960 /* Generate an X11 mouse sequence from the mouse event. */ 2961 /* TODO: switch to the 1006 protocol to allow specific-button-up reports */ 2962 switch (xip->ir.Event.MouseEvent.dwEventFlags) 2963 { 2964 case 0: /* press or release */ 2965 if (xip->ir.Event.MouseEvent.dwButtonState == 0) 2966 b = X11MOUSE_OFFSET + X11MOUSE_BUTTON_REL; 2967 else if (xip->ir.Event.MouseEvent.dwButtonState == 1) /* leftmost */ 2968 b = X11MOUSE_OFFSET + X11MOUSE_BUTTON1; 2969 else if (xip->ir.Event.MouseEvent.dwButtonState == 2) /* rightmost */ 2970 b = X11MOUSE_OFFSET + X11MOUSE_BUTTON3; 2971 else if (xip->ir.Event.MouseEvent.dwButtonState == 4) /* middle ("next-to-leftmost") */ 2972 b = X11MOUSE_OFFSET + X11MOUSE_BUTTON2; 2973 else /* don't bother to figure out what changed */ 2974 return (FALSE); 2975 break; 2976 case MOUSE_WHEELED: 2977 b = X11MOUSE_OFFSET + (((int)xip->ir.Event.MouseEvent.dwButtonState < 0) ? X11MOUSE_WHEEL_DOWN : X11MOUSE_WHEEL_UP); 2978 break; 2979 default: 2980 return (FALSE); 2981 } 2982 /* {{ TODO: change to X11 1006 format. }} */ 2983 win32_enqueue(ESC); 2984 win32_enqueue('['); 2985 win32_enqueue('M'); 2986 win32_enqueue(b); 2987 win32_enqueue(X11MOUSE_OFFSET + xip->ir.Event.MouseEvent.dwMousePosition.X + 1); 2988 win32_enqueue(X11MOUSE_OFFSET + xip->ir.Event.MouseEvent.dwMousePosition.Y + 1); 2989 return (TRUE); 2990 } 2991 2992 static void set_last_down(LWCHAR ch) 2993 { 2994 if (ch == 0) return; 2995 last_downs[last_down_index] = ch; 2996 if (++last_down_index >= LAST_DOWN_COUNT) 2997 last_down_index = 0; 2998 } 2999 3000 static LWCHAR *find_last_down(LWCHAR ch) 3001 { 3002 int i; 3003 for (i = 0; i < LAST_DOWN_COUNT; ++i) 3004 if (last_downs[i] == ch) 3005 return &last_downs[i]; 3006 return NULL; 3007 } 3008 3009 /* 3010 * Get an input char from an INPUT_RECORD and store in xip->ichar. 3011 * Handles surrogate chars, and KeyUp without previous corresponding KeyDown. 3012 */ 3013 static lbool win32_get_ichar(XINPUT_RECORD *xip) 3014 { 3015 LWCHAR ch = xip->ir.Event.KeyEvent.uChar.UnicodeChar; 3016 xip->ichar = ch; 3017 if (!is_ascii_char(ch)) 3018 { 3019 int is_down = xip->ir.Event.KeyEvent.bKeyDown; 3020 LWCHAR *last_down = find_last_down(ch); 3021 if (last_down == NULL) { /* key was up */ 3022 if (is_down) { /* key was up, now is down */ 3023 set_last_down(ch); 3024 } else { /* key up without previous down: pretend this is a down. */ 3025 xip->ir.Event.KeyEvent.bKeyDown = 1; 3026 } 3027 } else if (!is_down) { /* key was down, now is up */ 3028 *last_down = 0; /* use this last_down only once */ 3029 } 3030 3031 if (ch >= 0xD800 && ch < 0xDC00) { /* high surrogate */ 3032 hi_surr = 0x10000 + ((ch - 0xD800) << 10); 3033 return (FALSE); /* get next input, which should be the low surrogate */ 3034 } 3035 if (ch >= 0xDC00 && ch < 0xE000) { /* low surrogate */ 3036 xip->ichar = hi_surr + (ch - 0xDC00); 3037 hi_surr = 0; 3038 } 3039 } 3040 return (TRUE); 3041 } 3042 3043 /* 3044 * Handle a scan code (non-ASCII) key input. 3045 */ 3046 static lbool win32_scan_code(XINPUT_RECORD *xip) 3047 { 3048 int scan = -1; 3049 if (xip->ir.Event.KeyEvent.dwControlKeyState & (LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED)) 3050 { 3051 switch (xip->ir.Event.KeyEvent.wVirtualScanCode) 3052 { 3053 case PCK_RIGHT: /* right arrow */ 3054 scan = PCK_CTL_RIGHT; 3055 break; 3056 case PCK_LEFT: /* left arrow */ 3057 scan = PCK_CTL_LEFT; 3058 break; 3059 case PCK_DELETE: /* delete */ 3060 scan = PCK_CTL_DELETE; 3061 break; 3062 } 3063 } else if (xip->ir.Event.KeyEvent.dwControlKeyState & SHIFT_PRESSED) 3064 { 3065 if (xip->ichar == '\t') 3066 scan = PCK_SHIFT_TAB; 3067 } 3068 if (scan < 0 && xip->ichar == 0) 3069 scan = xip->ir.Event.KeyEvent.wVirtualScanCode; 3070 if (scan < 0) 3071 return (FALSE); 3072 /* 3073 * An extended key returns a 2 byte sequence consisting of 3074 * a zero byte followed by the scan code. 3075 */ 3076 win32_enqueue('\0'); 3077 win32_enqueue(scan); 3078 return (TRUE); 3079 } 3080 3081 /* 3082 * Handle a key input event. 3083 */ 3084 static lbool win32_key_event(XINPUT_RECORD *xip) 3085 { 3086 int repeat; 3087 char utf8[UTF8_MAX_LENGTH]; 3088 char *up; 3089 3090 if (xip->ir.EventType != KEY_EVENT || 3091 ((xip->ir.Event.KeyEvent.dwControlKeyState & (RIGHT_ALT_PRESSED|LEFT_CTRL_PRESSED)) == (RIGHT_ALT_PRESSED|LEFT_CTRL_PRESSED) && xip->ir.Event.KeyEvent.uChar.UnicodeChar == 0) || 3092 (xip->ir.Event.KeyEvent.wVirtualScanCode == 0 && xip->ir.Event.KeyEvent.uChar.UnicodeChar == 0) || 3093 xip->ir.Event.KeyEvent.wVirtualScanCode == PCK_CAPS_LOCK || 3094 xip->ir.Event.KeyEvent.wVirtualScanCode == PCK_NUM_LOCK || 3095 (xip->ir.Event.KeyEvent.wVirtualKeyCode == VK_MENU && xip->ir.Event.KeyEvent.uChar.UnicodeChar == 0) || 3096 xip->ir.Event.KeyEvent.wVirtualKeyCode == VK_KANJI || 3097 xip->ir.Event.KeyEvent.wVirtualKeyCode == VK_SHIFT || 3098 xip->ir.Event.KeyEvent.wVirtualKeyCode == VK_CONTROL) 3099 return (FALSE); 3100 3101 if (!win32_get_ichar(xip)) 3102 return (FALSE); 3103 if (!xip->ir.Event.KeyEvent.bKeyDown) 3104 return (FALSE); 3105 3106 if (win32_scan_code(xip)) 3107 return (TRUE); 3108 3109 repeat = xip->ir.Event.KeyEvent.wRepeatCount; 3110 if (repeat > WIN32_MAX_REPEAT) 3111 repeat = WIN32_MAX_REPEAT; 3112 up = utf8; 3113 put_wchar(&up, xip->ichar); 3114 for (; repeat > 0; --repeat) 3115 { 3116 constant char *p; 3117 for (p = utf8; p < up; ++p) 3118 win32_enqueue(*p); 3119 } 3120 return (TRUE); 3121 } 3122 3123 /* 3124 * Determine whether an input character is waiting to be read. 3125 */ 3126 public lbool win32_kbhit(void) 3127 { 3128 XINPUT_RECORD xip; 3129 3130 if (win32_queued_char()) 3131 return (TRUE); 3132 3133 for (;;) 3134 { 3135 DWORD nread; 3136 DWORD console_input_mode; 3137 /* 3138 * When an input pipe closes, cmd may reset the console mode, 3139 * so set the mode every time we read input. 3140 */ 3141 if (GetConsoleMode(tty, &console_input_mode) && console_input_mode != curr_console_input_mode) 3142 SetConsoleMode(tty, curr_console_input_mode); 3143 PeekConsoleInputW(tty, &xip.ir, 1, &nread); 3144 if (nread == 0) 3145 return (FALSE); 3146 ReadConsoleInputW(tty, &xip.ir, 1, &nread); 3147 if (nread == 0) 3148 return (FALSE); 3149 if (win32_mouse_event(&xip) || win32_key_event(&xip)) 3150 break; 3151 } 3152 return (TRUE); 3153 } 3154 3155 /* 3156 * Read a character from the keyboard. 3157 */ 3158 public char WIN32getch(void) 3159 { 3160 while (!win32_kbhit()) 3161 { 3162 Sleep(20); 3163 if (ABORT_SIGS()) 3164 return ('\003'); 3165 } 3166 return (win32_get_queue()); 3167 } 3168 3169 public void win32_getch_clear(void) 3170 { 3171 while (win32_kbhit()) 3172 (void) WIN32getch(); 3173 } 3174 3175 #endif /* MSDOS_COMPILER==WIN32C */ 3176 3177 #if MSDOS_COMPILER 3178 /* 3179 */ 3180 public void WIN32setcolors(int fg, int bg) 3181 { 3182 SETCOLORS(fg, bg); 3183 } 3184 3185 /* 3186 */ 3187 public void WIN32textout(constant char *text, size_t len) 3188 { 3189 #if MSDOS_COMPILER==WIN32C 3190 DWORD written; 3191 if (utf_mode == 2) 3192 { 3193 /* 3194 * We've got UTF-8 text in a non-UTF-8 console. Convert it to 3195 * wide and use WriteConsoleW. 3196 * Biggest input len is OUTBUF_SIZE of obuf from win_flush, 3197 * which is also the biggest output count if it's ASCII. 3198 * "static" wtext is not a state - only avoid 16K on stack. 3199 */ 3200 static WCHAR wtext[OUTBUF_SIZE]; 3201 len = MultiByteToWideChar(CP_UTF8, 0, text, len, wtext, countof(wtext)); 3202 WriteConsoleW(con_out, wtext, len, &written, NULL); 3203 } else 3204 WriteConsole(con_out, text, len, &written, NULL); 3205 #else 3206 char buf[2048]; 3207 if (len >= sizeof(buf)) 3208 len = sizeof(buf) - 1; 3209 memcpy(buf, text, len); 3210 buf[len] = 0; 3211 cputs(buf); 3212 #endif 3213 } 3214 #endif 3215