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