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 */
set_termio_flags(struct termios * s)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 */
raw_mode(int on)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
ltget_env(constant char * capname)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
ltgetflag(constant char * capname)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
ltgetnum(constant char * capname)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
ltgetstr(constant char * capname,char ** pp)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 */
scrsize(void)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 calc_jump_sline();
915 }
916
917 #if MSDOS_COMPILER==MSOFTC
918 /*
919 * Figure out how many empty loops it takes to delay a millisecond.
920 */
get_clock(void)921 static void get_clock(void)
922 {
923 clock_t start;
924
925 /*
926 * Get synchronized at the start of a tick.
927 */
928 start = clock();
929 while (clock() == start)
930 ;
931 /*
932 * Now count loops till the next tick.
933 */
934 start = clock();
935 msec_loops = 0;
936 while (clock() == start)
937 msec_loops++;
938 /*
939 * Convert from (loops per clock) to (loops per millisecond).
940 */
941 msec_loops *= CLOCKS_PER_SEC;
942 msec_loops /= 1000;
943 }
944
945 /*
946 * Delay for a specified number of milliseconds.
947 */
delay(int msec)948 static void delay(int msec)
949 {
950 long i;
951
952 while (msec-- > 0)
953 {
954 for (i = 0; i < msec_loops; i++)
955 (void) clock();
956 }
957 }
958 #endif
959
960 /*
961 * Return the characters actually input by a "special" key.
962 */
special_key_str(int key)963 public constant char * special_key_str(int key)
964 {
965 static char tbuf[40];
966 constant char *s;
967 #if MSDOS_COMPILER || OS2
968 static char k_right[] = { '\340', PCK_RIGHT, 0 };
969 static char k_left[] = { '\340', PCK_LEFT, 0 };
970 static char k_ctl_right[] = { '\340', PCK_CTL_RIGHT, 0 };
971 static char k_ctl_left[] = { '\340', PCK_CTL_LEFT, 0 };
972 static char k_insert[] = { '\340', PCK_INSERT, 0 };
973 static char k_delete[] = { '\340', PCK_DELETE, 0 };
974 static char k_ctl_delete[] = { '\340', PCK_CTL_DELETE, 0 };
975 static char k_ctl_backspace[] = { '\177', 0 };
976 static char k_backspace[] = { '\b', 0 };
977 static char k_home[] = { '\340', PCK_HOME, 0 };
978 static char k_end[] = { '\340', PCK_END, 0 };
979 static char k_up[] = { '\340', PCK_UP, 0 };
980 static char k_down[] = { '\340', PCK_DOWN, 0 };
981 static char k_backtab[] = { '\340', PCK_SHIFT_TAB, 0 };
982 static char k_pagedown[] = { '\340', PCK_PAGEDOWN, 0 };
983 static char k_pageup[] = { '\340', PCK_PAGEUP, 0 };
984 static char k_f1[] = { '\340', PCK_F1, 0 };
985 #endif
986 #if !MSDOS_COMPILER
987 char *sp = tbuf;
988 #endif
989
990 switch (key)
991 {
992 #if OS2
993 /*
994 * If windowid is not NULL, assume less is executed in
995 * the XFree86 environment.
996 */
997 case SK_RIGHT_ARROW:
998 s = windowid ? ltgetstr("kr", &sp) : k_right;
999 break;
1000 case SK_LEFT_ARROW:
1001 s = windowid ? ltgetstr("kl", &sp) : k_left;
1002 break;
1003 case SK_UP_ARROW:
1004 s = windowid ? ltgetstr("ku", &sp) : k_up;
1005 break;
1006 case SK_DOWN_ARROW:
1007 s = windowid ? ltgetstr("kd", &sp) : k_down;
1008 break;
1009 case SK_PAGE_UP:
1010 s = windowid ? ltgetstr("kP", &sp) : k_pageup;
1011 break;
1012 case SK_PAGE_DOWN:
1013 s = windowid ? ltgetstr("kN", &sp) : k_pagedown;
1014 break;
1015 case SK_HOME:
1016 s = windowid ? ltgetstr("kh", &sp) : k_home;
1017 break;
1018 case SK_END:
1019 s = windowid ? ltgetstr("@7", &sp) : k_end;
1020 break;
1021 case SK_DELETE:
1022 s = windowid ? ltgetstr("kD", &sp) : k_delete;
1023 if (s == NULL)
1024 {
1025 tbuf[0] = '\177';
1026 tbuf[1] = '\0';
1027 s = tbuf;
1028 }
1029 break;
1030 #endif
1031 #if MSDOS_COMPILER
1032 case SK_RIGHT_ARROW:
1033 s = k_right;
1034 break;
1035 case SK_LEFT_ARROW:
1036 s = k_left;
1037 break;
1038 case SK_UP_ARROW:
1039 s = k_up;
1040 break;
1041 case SK_DOWN_ARROW:
1042 s = k_down;
1043 break;
1044 case SK_PAGE_UP:
1045 s = k_pageup;
1046 break;
1047 case SK_PAGE_DOWN:
1048 s = k_pagedown;
1049 break;
1050 case SK_HOME:
1051 s = k_home;
1052 break;
1053 case SK_END:
1054 s = k_end;
1055 break;
1056 case SK_DELETE:
1057 s = k_delete;
1058 break;
1059 #endif
1060 #if MSDOS_COMPILER || OS2
1061 case SK_INSERT:
1062 s = k_insert;
1063 break;
1064 case SK_CTL_LEFT_ARROW:
1065 s = k_ctl_left;
1066 break;
1067 case SK_CTL_RIGHT_ARROW:
1068 s = k_ctl_right;
1069 break;
1070 case SK_CTL_BACKSPACE:
1071 s = k_ctl_backspace;
1072 break;
1073 case SK_CTL_DELETE:
1074 s = k_ctl_delete;
1075 break;
1076 case SK_BACKSPACE:
1077 s = k_backspace;
1078 break;
1079 case SK_F1:
1080 s = k_f1;
1081 break;
1082 case SK_BACKTAB:
1083 s = k_backtab;
1084 break;
1085 #else
1086 case SK_RIGHT_ARROW:
1087 s = ltgetstr("kr", &sp);
1088 break;
1089 case SK_LEFT_ARROW:
1090 s = ltgetstr("kl", &sp);
1091 break;
1092 case SK_UP_ARROW:
1093 s = ltgetstr("ku", &sp);
1094 break;
1095 case SK_DOWN_ARROW:
1096 s = ltgetstr("kd", &sp);
1097 break;
1098 case SK_PAGE_UP:
1099 s = ltgetstr("kP", &sp);
1100 break;
1101 case SK_PAGE_DOWN:
1102 s = ltgetstr("kN", &sp);
1103 break;
1104 case SK_HOME:
1105 s = ltgetstr("kh", &sp);
1106 break;
1107 case SK_END:
1108 s = ltgetstr("@7", &sp);
1109 break;
1110 case SK_DELETE:
1111 s = ltgetstr("kD", &sp);
1112 if (s == NULL)
1113 {
1114 tbuf[0] = '\177';
1115 tbuf[1] = '\0';
1116 s = tbuf;
1117 }
1118 break;
1119 case SK_BACKSPACE:
1120 s = ltgetstr("kb", &sp);
1121 if (s == NULL)
1122 {
1123 tbuf[0] = '\b';
1124 tbuf[1] = '\0';
1125 s = tbuf;
1126 }
1127 break;
1128 #endif
1129 case SK_CONTROL_K:
1130 tbuf[0] = CONTROL('K');
1131 tbuf[1] = '\0';
1132 s = tbuf;
1133 break;
1134 default:
1135 return (NULL);
1136 }
1137 return (s);
1138 }
1139
1140 #if MSDOS_COMPILER
init_win_colors(void)1141 public void init_win_colors(void)
1142 {
1143 if (nm_fg_color == CV_ERROR || nm_fg_color == CV_NOCHANGE) nm_fg_color = sy_fg_color;
1144 if (nm_bg_color == CV_ERROR || nm_bg_color == CV_NOCHANGE) nm_bg_color = sy_bg_color;
1145 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;
1146 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;
1147 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;
1148 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;
1149 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;
1150 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;
1151 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;
1152 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;
1153 nm_fg_color |= nm_attr;
1154 bo_fg_color |= bo_attr;
1155 ul_fg_color |= ul_attr;
1156 so_fg_color |= so_attr;
1157 bl_fg_color |= bl_attr;
1158 }
1159 #endif /* MSDOS_COMPILER */
1160
1161 /*
1162 * Get terminal capabilities via termcap.
1163 */
get_term(void)1164 public void get_term(void)
1165 {
1166 termcap_debug = !isnullenv(lgetenv("LESS_TERMCAP_DEBUG"));
1167 #if MSDOS_COMPILER
1168 auto_wrap = 1;
1169 ignaw = 0;
1170 can_goto_line = 1;
1171 clear_bg = 1;
1172 /*
1173 * Set up default colors.
1174 * The xx_s_width and xx_e_width vars are already initialized to 0.
1175 */
1176 #if MSDOS_COMPILER==MSOFTC
1177 sy_bg_color = _getbkcolor();
1178 sy_fg_color = _gettextcolor();
1179 get_clock();
1180 #else
1181 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1182 {
1183 struct text_info w;
1184 gettextinfo(&w);
1185 sy_bg_color = (w.attribute >> 4) & 0x0F;
1186 sy_fg_color = (w.attribute >> 0) & 0x0F;
1187 }
1188 #else
1189 #if MSDOS_COMPILER==WIN32C
1190 {
1191 CONSOLE_SCREEN_BUFFER_INFO scr;
1192
1193 con_out_save = con_out = GetStdHandle(STD_OUTPUT_HANDLE);
1194 /*
1195 * Always open stdin in binary. Note this *must* be done
1196 * before any file operations have been done on fd0.
1197 */
1198 SET_BINARY(0);
1199 GetConsoleMode(con_out, &init_console_output_mode);
1200 GetConsoleScreenBufferInfo(con_out, &scr);
1201 curr_attr = scr.wAttributes;
1202 sy_bg_color = (curr_attr & BG_COLORS) >> 4; /* normalize */
1203 sy_fg_color = curr_attr & FG_COLORS;
1204 }
1205 #endif
1206 #endif
1207 #endif
1208 init_win_colors();
1209
1210 /*
1211 * Get size of the screen.
1212 */
1213 scrsize();
1214 pos_init();
1215
1216 #else /* !MSDOS_COMPILER */
1217 {
1218 char *sp;
1219 constant char *t1;
1220 constant char *t2;
1221 constant char *term;
1222 /*
1223 * Some termcap libraries assume termbuf is static
1224 * (accessible after tgetent returns).
1225 */
1226 static char termbuf[TERMBUF_SIZE];
1227 static char sbuf[TERMSBUF_SIZE];
1228
1229 #if OS2
1230 /*
1231 * Make sure the termcap database is available.
1232 */
1233 constant char *cp = lgetenv("TERMCAP");
1234 if (isnullenv(cp))
1235 {
1236 char *termcap;
1237 if ((sp = homefile("termcap.dat")) != NULL)
1238 {
1239 termcap = (char *) ecalloc(strlen(sp)+9, sizeof(char));
1240 sprintf(termcap, "TERMCAP=%s", sp);
1241 free(sp);
1242 putenv(termcap);
1243 }
1244 }
1245 #endif
1246 /*
1247 * Find out what kind of terminal this is.
1248 */
1249 if ((term = lgetenv("TERM")) == NULL)
1250 term = DEFAULT_TERM;
1251 hardcopy = 0;
1252 /* {{ Should probably just pass NULL instead of termbuf. }} */
1253 if (tgetent(termbuf, term) != TGETENT_OK)
1254 hardcopy = 1;
1255 if (ltgetflag("hc"))
1256 hardcopy = 1;
1257
1258 /*
1259 * Get size of the screen.
1260 */
1261 scrsize();
1262 pos_init();
1263
1264 auto_wrap = ltgetflag("am");
1265 ignaw = ltgetflag("xn");
1266 above_mem = ltgetflag("da");
1267 below_mem = ltgetflag("db");
1268 clear_bg = ltgetflag("ut");
1269 no_alt_screen = ltgetflag("NR");
1270
1271 /*
1272 * Assumes termcap variable "sg" is the printing width of:
1273 * the standout sequence, the end standout sequence,
1274 * the underline sequence, the end underline sequence,
1275 * the boldface sequence, and the end boldface sequence.
1276 */
1277 if ((so_s_width = ltgetnum("sg")) < 0)
1278 so_s_width = 0;
1279 so_e_width = so_s_width;
1280
1281 bo_s_width = bo_e_width = so_s_width;
1282 ul_s_width = ul_e_width = so_s_width;
1283 bl_s_width = bl_e_width = so_s_width;
1284
1285 #if HILITE_SEARCH
1286 if (so_s_width > 0 || so_e_width > 0)
1287 /*
1288 * Disable highlighting by default on magic cookie terminals.
1289 * Turning on highlighting might change the displayed width
1290 * of a line, causing the display to get messed up.
1291 * The user can turn it back on with -g,
1292 * but she won't like the results.
1293 */
1294 hilite_search = 0;
1295 #endif
1296
1297 /*
1298 * Get various string-valued capabilities.
1299 */
1300 sp = sbuf;
1301
1302 #if HAVE_OSPEED
1303 sc_pad = ltgetstr("pc", &sp);
1304 if (sc_pad != NULL)
1305 PC = *sc_pad;
1306 #endif
1307
1308 sc_s_keypad = ltgetstr("ks", &sp);
1309 if (sc_s_keypad == NULL)
1310 sc_s_keypad = "";
1311 sc_e_keypad = ltgetstr("ke", &sp);
1312 if (sc_e_keypad == NULL)
1313 sc_e_keypad = "";
1314 kent = ltgetstr("@8", &sp);
1315
1316 sc_s_mousecap = ltgetstr("MOUSE_START", &sp);
1317 if (sc_s_mousecap == NULL)
1318 sc_s_mousecap = ESCS "[?1000h" ESCS "[?1006h";
1319 sc_e_mousecap = ltgetstr("MOUSE_END", &sp);
1320 if (sc_e_mousecap == NULL)
1321 sc_e_mousecap = ESCS "[?1006l" ESCS "[?1000l";
1322
1323 sc_init = ltgetstr("ti", &sp);
1324 if (sc_init == NULL)
1325 sc_init = "";
1326
1327 sc_deinit= ltgetstr("te", &sp);
1328 if (sc_deinit == NULL)
1329 sc_deinit = "";
1330
1331 sc_eol_clear = ltgetstr("ce", &sp);
1332 if (sc_eol_clear == NULL || *sc_eol_clear == '\0')
1333 {
1334 missing_cap = 1;
1335 sc_eol_clear = "";
1336 }
1337
1338 sc_eos_clear = ltgetstr("cd", &sp);
1339 if (below_mem && (sc_eos_clear == NULL || *sc_eos_clear == '\0'))
1340 {
1341 missing_cap = 1;
1342 sc_eos_clear = "";
1343 }
1344
1345 sc_clear = ltgetstr("cl", &sp);
1346 if (sc_clear == NULL || *sc_clear == '\0')
1347 {
1348 missing_cap = 1;
1349 sc_clear = "\n\n";
1350 }
1351
1352 sc_move = ltgetstr("cm", &sp);
1353 if (sc_move == NULL || *sc_move == '\0')
1354 {
1355 /*
1356 * This is not an error here, because we don't
1357 * always need sc_move.
1358 * We need it only if we don't have home or lower-left.
1359 */
1360 sc_move = "";
1361 can_goto_line = 0;
1362 } else
1363 can_goto_line = 1;
1364
1365 tmodes("so", "se", &sc_s_in, &sc_s_out, "", "", &sp);
1366 tmodes("us", "ue", &sc_u_in, &sc_u_out, sc_s_in, sc_s_out, &sp);
1367 tmodes("md", "me", &sc_b_in, &sc_b_out, sc_s_in, sc_s_out, &sp);
1368 tmodes("mb", "me", &sc_bl_in, &sc_bl_out, sc_s_in, sc_s_out, &sp);
1369
1370 sc_visual_bell = ltgetstr("vb", &sp);
1371 if (sc_visual_bell == NULL)
1372 sc_visual_bell = "";
1373
1374 if (ltgetflag("bs"))
1375 sc_backspace = "\b";
1376 else
1377 {
1378 sc_backspace = ltgetstr("bc", &sp);
1379 if (sc_backspace == NULL || *sc_backspace == '\0')
1380 sc_backspace = "\b";
1381 }
1382
1383 /*
1384 * Choose between using "ho" and "cm" ("home" and "cursor move")
1385 * to move the cursor to the upper left corner of the screen.
1386 */
1387 t1 = ltgetstr("ho", &sp);
1388 if (t1 == NULL)
1389 t1 = "";
1390 if (*sc_move == '\0')
1391 t2 = "";
1392 else
1393 {
1394 strcpy(sp, tgoto(sc_move, 0, 0));
1395 t2 = sp;
1396 sp += strlen(sp) + 1;
1397 }
1398 sc_home = cheaper(t1, t2, "|\b^");
1399
1400 /*
1401 * Choose between using "ll" and "cm" ("lower left" and "cursor move")
1402 * to move the cursor to the lower left corner of the screen.
1403 */
1404 t1 = ltgetstr("ll", &sp);
1405 if (t1 == NULL || !full_screen)
1406 t1 = "";
1407 if (*sc_move == '\0')
1408 t2 = "";
1409 else
1410 {
1411 strcpy(sp, tgoto(sc_move, 0, sc_height-1));
1412 t2 = sp;
1413 sp += strlen(sp) + 1;
1414 }
1415 sc_lower_left = cheaper(t1, t2, "\r");
1416
1417 /*
1418 * Get carriage return string.
1419 */
1420 sc_return = ltgetstr("cr", &sp);
1421 if (sc_return == NULL)
1422 sc_return = "\r";
1423
1424 /*
1425 * Choose between using "al" or "sr" ("add line" or "scroll reverse")
1426 * to add a line at the top of the screen.
1427 */
1428 t1 = ltgetstr("al", &sp);
1429 if (t1 == NULL)
1430 t1 = "";
1431 t2 = ltgetstr("sr", &sp);
1432 if (t2 == NULL)
1433 t2 = "";
1434 #if OS2
1435 if (*t1 == '\0' && *t2 == '\0')
1436 sc_addline = "";
1437 else
1438 #endif
1439 if (above_mem)
1440 sc_addline = t1;
1441 else
1442 sc_addline = cheaper(t1, t2, "");
1443 if (*sc_addline == '\0')
1444 {
1445 /*
1446 * Force repaint on any backward movement.
1447 */
1448 no_back_scroll = 1;
1449 }
1450 }
1451 #endif /* MSDOS_COMPILER */
1452 }
1453
1454 #if !MSDOS_COMPILER
1455 /*
1456 * Return the cost of displaying a termcap string.
1457 * We use the trick of calling tputs, but as a char printing function
1458 * we give it inc_costcount, which just increments "costcount".
1459 * This tells us how many chars would be printed by using this string.
1460 * {{ Couldn't we just use strlen? }}
1461 */
1462 static int costcount;
1463
1464 /*ARGSUSED*/
inc_costcount(int c)1465 static int inc_costcount(int c)
1466 {
1467 costcount++;
1468 return (c);
1469 }
1470
cost(constant char * t)1471 static int cost(constant char *t)
1472 {
1473 costcount = 0;
1474 tputs(t, sc_height, inc_costcount);
1475 return (costcount);
1476 }
1477
1478 /*
1479 * Return the "best" of the two given termcap strings.
1480 * The best, if both exist, is the one with the lower
1481 * cost (see cost() function).
1482 */
cheaper(constant char * t1,constant char * t2,constant char * def)1483 static constant char * cheaper(constant char *t1, constant char *t2, constant char *def)
1484 {
1485 if (*t1 == '\0' && *t2 == '\0')
1486 {
1487 missing_cap = 1;
1488 return (def);
1489 }
1490 if (*t1 == '\0')
1491 return (t2);
1492 if (*t2 == '\0')
1493 return (t1);
1494 if (cost(t1) < cost(t2))
1495 return (t1);
1496 return (t2);
1497 }
1498
tmodes(constant char * incap,constant char * outcap,constant char ** instr,constant char ** outstr,constant char * def_instr,constant char * def_outstr,char ** spp)1499 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)
1500 {
1501 *instr = ltgetstr(incap, spp);
1502 if (*instr == NULL)
1503 {
1504 /* Use defaults. */
1505 *instr = def_instr;
1506 *outstr = def_outstr;
1507 return;
1508 }
1509
1510 *outstr = ltgetstr(outcap, spp);
1511 if (*outstr == NULL)
1512 /* No specific out capability; use "me". */
1513 *outstr = ltgetstr("me", spp);
1514 if (*outstr == NULL)
1515 /* Don't even have "me"; use a null string. */
1516 *outstr = "";
1517 }
1518
1519 #endif /* MSDOS_COMPILER */
1520
1521
1522 /*
1523 * Below are the functions which perform all the
1524 * terminal-specific screen manipulation.
1525 */
1526
1527
1528 #if MSDOS_COMPILER
1529
1530 #if MSDOS_COMPILER==WIN32C
_settextposition(int row,int col)1531 static void _settextposition(int row, int col)
1532 {
1533 COORD cpos;
1534 CONSOLE_SCREEN_BUFFER_INFO csbi;
1535
1536 GetConsoleScreenBufferInfo(con_out, &csbi);
1537 cpos.X = csbi.srWindow.Left + (col - 1);
1538 cpos.Y = csbi.srWindow.Top + (row - 1);
1539 SetConsoleCursorPosition(con_out, cpos);
1540 }
1541 #endif
1542
1543 /*
1544 * Initialize the screen to the correct color at startup.
1545 */
initcolor(void)1546 static void initcolor(void)
1547 {
1548 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1549 intensevideo();
1550 #endif
1551 SETCOLORS(nm_fg_color, nm_bg_color);
1552 #if 0
1553 /*
1554 * This clears the screen at startup. This is different from
1555 * the behavior of other versions of less. Disable it for now.
1556 */
1557 char *blanks;
1558 int row;
1559 int col;
1560
1561 /*
1562 * Create a complete, blank screen using "normal" colors.
1563 */
1564 SETCOLORS(nm_fg_color, nm_bg_color);
1565 blanks = (char *) ecalloc(width+1, sizeof(char));
1566 for (col = 0; col < sc_width; col++)
1567 blanks[col] = ' ';
1568 blanks[sc_width] = '\0';
1569 for (row = 0; row < sc_height; row++)
1570 _outtext(blanks);
1571 free(blanks);
1572 #endif
1573 }
1574 #endif
1575
1576 #if MSDOS_COMPILER==WIN32C
1577
1578 /*
1579 * Enable virtual terminal processing, if available.
1580 */
win32_init_vt_term(void)1581 static void win32_init_vt_term(void)
1582 {
1583 DWORD console_output_mode;
1584
1585 if (vt_enabled == 0 || (vt_enabled == 1 && con_out == con_out_ours))
1586 return;
1587
1588 console_output_mode = init_console_output_mode | ENABLE_VIRTUAL_TERMINAL_PROCESSING;
1589 vt_enabled = SetConsoleMode(con_out, console_output_mode);
1590 if (vt_enabled)
1591 {
1592 auto_wrap = 0;
1593 ignaw = 1;
1594 }
1595 }
1596
win32_deinit_vt_term(void)1597 static void win32_deinit_vt_term(void)
1598 {
1599 if (vt_enabled == 1 && con_out == con_out_save)
1600 SetConsoleMode(con_out, init_console_output_mode);
1601 }
1602
1603 /*
1604 * Termcap-like init with a private win32 console.
1605 */
win32_init_term(void)1606 static void win32_init_term(void)
1607 {
1608 CONSOLE_SCREEN_BUFFER_INFO scr;
1609 COORD size;
1610
1611 if (con_out_save == INVALID_HANDLE_VALUE)
1612 return;
1613
1614 GetConsoleScreenBufferInfo(con_out_save, &scr);
1615
1616 if (con_out_ours == INVALID_HANDLE_VALUE)
1617 {
1618 /*
1619 * Create our own screen buffer, so that we
1620 * may restore the original when done.
1621 */
1622 con_out_ours = CreateConsoleScreenBuffer(
1623 GENERIC_WRITE | GENERIC_READ,
1624 FILE_SHARE_WRITE | FILE_SHARE_READ,
1625 (LPSECURITY_ATTRIBUTES) NULL,
1626 CONSOLE_TEXTMODE_BUFFER,
1627 (LPVOID) NULL);
1628 }
1629
1630 size.X = scr.srWindow.Right - scr.srWindow.Left + 1;
1631 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1;
1632 SetConsoleScreenBufferSize(con_out_ours, size);
1633 SetConsoleActiveScreenBuffer(con_out_ours);
1634 con_out = con_out_ours;
1635 }
1636
1637 /*
1638 * Restore the startup console.
1639 */
win32_deinit_term(void)1640 static void win32_deinit_term(void)
1641 {
1642 if (con_out_save == INVALID_HANDLE_VALUE)
1643 return;
1644 if (quitting)
1645 (void) CloseHandle(con_out_ours);
1646 SetConsoleActiveScreenBuffer(con_out_save);
1647 con_out = con_out_save;
1648 }
1649
1650 #endif
1651
1652 #if !MSDOS_COMPILER
do_tputs(constant char * str,int affcnt,int (* f_putc)(int))1653 static void do_tputs(constant char *str, int affcnt, int (*f_putc)(int))
1654 {
1655 #if LESSTEST
1656 if (is_lesstest() && f_putc == putchr)
1657 putstr(str);
1658 else
1659 #endif /*LESSTEST*/
1660 tputs(str, affcnt, f_putc);
1661 }
1662
1663 /*
1664 * Like tputs but we handle $<...> delay strings here because
1665 * some implementations of tputs don't perform delays correctly.
1666 */
ltputs(constant char * str,int affcnt,int (* f_putc)(int))1667 static void ltputs(constant char *str, int affcnt, int (*f_putc)(int))
1668 {
1669 while (str != NULL && *str != '\0')
1670 {
1671 #if HAVE_STRSTR
1672 constant char *obrac = strstr(str, "$<");
1673 if (obrac != NULL)
1674 {
1675 char str2[64];
1676 size_t slen = ptr_diff(obrac, str);
1677 if (slen < sizeof(str2))
1678 {
1679 int delay;
1680 /* Output first part of string (before "$<"). */
1681 memcpy(str2, str, slen);
1682 str2[slen] = '\0';
1683 do_tputs(str2, affcnt, f_putc);
1684 str += slen + 2;
1685 /* Perform the delay. */
1686 delay = lstrtoic(str, &str, 10);
1687 if (*str == '*')
1688 if (ckd_mul(&delay, delay, affcnt))
1689 delay = INT_MAX;
1690 flush();
1691 sleep_ms(delay);
1692 /* Skip past closing ">" at end of delay string. */
1693 str = strstr(str, ">");
1694 if (str != NULL)
1695 str++;
1696 continue;
1697 }
1698 }
1699 #endif
1700 /* Pass the rest of the string to tputs and we're done. */
1701 do_tputs(str, affcnt, f_putc);
1702 break;
1703 }
1704 }
1705 #endif /* MSDOS_COMPILER */
1706
1707 /*
1708 * Configure the terminal so mouse clicks and wheel moves
1709 * produce input to less.
1710 */
init_mouse(void)1711 public void init_mouse(void)
1712 {
1713 #if !MSDOS_COMPILER
1714 ltputs(sc_s_mousecap, sc_height, putchr);
1715 #else
1716 #if MSDOS_COMPILER==WIN32C
1717 curr_console_input_mode = mouse_console_input_mode;
1718 SetConsoleMode(tty, curr_console_input_mode);
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 curr_console_input_mode = base_console_input_mode;
1734 SetConsoleMode(tty, curr_console_input_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();
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(constant char ** ps)2474 static int parse_color6(constant char **ps)
2475 {
2476 if (**ps == '-')
2477 {
2478 (*ps)++;
2479 return CV_NOCHANGE;
2480 } else
2481 {
2482 constant char *os = *ps;
2483 int color = lstrtoic(os, ps, 10);
2484 if (color < 0 || *ps == os)
2485 return CV_ERROR;
2486 return color;
2487 }
2488 }
2489
2490 /*
2491 * Parse a color pair and return the foreground/background/attribute 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(constant char * str,mutable int * p_fg,mutable int * p_bg,mutable CHAR_ATTR * p_cattr)2496 public COLOR_TYPE parse_color(constant char *str, mutable int *p_fg, mutable int *p_bg, mutable CHAR_ATTR *p_cattr)
2497 {
2498 int fg;
2499 int bg = CV_ERROR;
2500 CHAR_ATTR cattr = CATTR_NULL;
2501 COLOR_TYPE type = CT_NULL;
2502
2503 if (str == NULL || *str == '\0')
2504 return CT_NULL;
2505 if (*str == '+')
2506 str++; /* ignore leading + */
2507
2508 fg = parse_color4(*str);
2509 if (fg != CV_ERROR)
2510 {
2511 if (str[1] == '\0' || strchr("*~_&dsul", str[1]) != NULL)
2512 {
2513 bg = CV_NOCHANGE;
2514 str++; /* skip the fg char */
2515 } else
2516 {
2517 bg = parse_color4(str[1]);
2518 if (bg != CV_ERROR)
2519 str += 2; /* skip both fg and bg chars */
2520 }
2521 }
2522 if (fg != CV_ERROR && bg != CV_ERROR)
2523 type = CT_4BIT;
2524 else
2525 {
2526 fg = (*str == '.') ? CV_NOCHANGE : parse_color6(&str);
2527 if (fg != CV_ERROR)
2528 {
2529 if (*str != '.')
2530 bg = CV_NOCHANGE;
2531 else
2532 {
2533 str++; /* skip the dot */
2534 bg = parse_color6(&str);
2535 }
2536 }
2537 if (fg != CV_ERROR && bg != CV_ERROR)
2538 type = CT_6BIT;
2539 }
2540 if (type != CT_NULL)
2541 {
2542 for (;; str++)
2543 {
2544 if (*str == '*' || *str == 'd')
2545 cattr |= CATTR_BOLD;
2546 else if (*str == '~' || *str == 's')
2547 cattr |= CATTR_STANDOUT;
2548 else if (*str == '_' || *str == 'u')
2549 cattr |= CATTR_UNDERLINE;
2550 else if (*str == '&' || *str == 'l') /* can't use 'k' because of conflict with "black" */
2551 cattr |= CATTR_BLINK;
2552 else
2553 break;
2554 }
2555 if (p_fg != NULL) *p_fg = fg;
2556 if (p_bg != NULL) *p_bg = bg;
2557 if (p_cattr != NULL) *p_cattr = cattr;
2558 }
2559 return type;
2560 }
2561
2562 #if !MSDOS_COMPILER
2563
sgr_color(int color)2564 static int sgr_color(int color)
2565 {
2566 switch (color)
2567 {
2568 case 0: return 30;
2569 case CV_RED: return 31;
2570 case CV_GREEN: return 32;
2571 case CV_RED|CV_GREEN: return 33;
2572 case CV_BLUE: return 34;
2573 case CV_RED|CV_BLUE: return 35;
2574 case CV_GREEN|CV_BLUE: return 36;
2575 case CV_RED|CV_GREEN|CV_BLUE: return 37;
2576
2577 case CV_BRIGHT: return 90;
2578 case CV_RED|CV_BRIGHT: return 91;
2579 case CV_GREEN|CV_BRIGHT: return 92;
2580 case CV_RED|CV_GREEN|CV_BRIGHT: return 93;
2581 case CV_BLUE|CV_BRIGHT: return 94;
2582 case CV_RED|CV_BLUE|CV_BRIGHT: return 95;
2583 case CV_GREEN|CV_BLUE|CV_BRIGHT: return 96;
2584 case CV_RED|CV_GREEN|CV_BLUE|CV_BRIGHT: return 97;
2585
2586 default: return color;
2587 }
2588 }
2589
tput_fmt(constant char * fmt,int color,int (* f_putc)(int))2590 static void tput_fmt(constant char *fmt, int color, int (*f_putc)(int))
2591 {
2592 char buf[INT_STRLEN_BOUND(int)+16];
2593 if (color == attrcolor)
2594 return;
2595 SNPRINTF1(buf, sizeof(buf), fmt, color);
2596 ltputs(buf, 1, f_putc);
2597 attrcolor = color;
2598 }
2599
tput_char_cattr(CHAR_ATTR cattr,int (* f_putc)(int))2600 static void tput_char_cattr(CHAR_ATTR cattr, int (*f_putc)(int))
2601 {
2602 if (cattr & CATTR_UNDERLINE)
2603 ltputs(sc_u_in, 1, f_putc);
2604 if (cattr & CATTR_BOLD)
2605 ltputs(sc_b_in, 1, f_putc);
2606 if (cattr & CATTR_BLINK)
2607 ltputs(sc_bl_in, 1, f_putc);
2608 if (cattr & CATTR_STANDOUT)
2609 ltputs(sc_s_in, 1, f_putc);
2610 }
2611
tput_color(constant char * str,int (* f_putc)(int))2612 static void tput_color(constant char *str, int (*f_putc)(int))
2613 {
2614 int fg;
2615 int bg;
2616 CHAR_ATTR cattr;
2617
2618 if (str != NULL && strcmp(str, "*") == 0)
2619 {
2620 /* Special case: reset to normal */
2621 tput_fmt(ESCS"[m", -1, f_putc);
2622 return;
2623 }
2624 switch (parse_color(str, &fg, &bg, &cattr))
2625 {
2626 case CT_4BIT:
2627 if (fg >= 0)
2628 tput_fmt(ESCS"[%dm", sgr_color(fg), f_putc);
2629 if (bg >= 0)
2630 tput_fmt(ESCS"[%dm", sgr_color(bg)+10, f_putc);
2631 tput_char_cattr(cattr, f_putc);
2632 break;
2633 case CT_6BIT:
2634 if (fg >= 0)
2635 tput_fmt(ESCS"[38;5;%dm", fg, f_putc);
2636 if (bg >= 0)
2637 tput_fmt(ESCS"[48;5;%dm", bg, f_putc);
2638 tput_char_cattr(cattr, f_putc);
2639 break;
2640 default:
2641 break;
2642 }
2643 }
2644
tput_inmode(constant char * mode_str,int attr,int attr_bit,int (* f_putc)(int))2645 static void tput_inmode(constant char *mode_str, int attr, int attr_bit, int (*f_putc)(int))
2646 {
2647 constant char *color_str;
2648 if ((attr & attr_bit) == 0)
2649 return;
2650 color_str = get_color_map(attr_bit);
2651 if (color_str == NULL || *color_str == '\0' || *color_str == '+')
2652 {
2653 ltputs(mode_str, 1, f_putc);
2654 if (color_str == NULL || *color_str++ != '+')
2655 return;
2656 }
2657 /* Color overrides mode string */
2658 tput_color(color_str, f_putc);
2659 }
2660
tput_outmode(constant char * mode_str,int attr_bit,int (* f_putc)(int))2661 static void tput_outmode(constant char *mode_str, int attr_bit, int (*f_putc)(int))
2662 {
2663 if ((attrmode & attr_bit) == 0)
2664 return;
2665 ltputs(mode_str, 1, f_putc);
2666 }
2667
2668 #else /* MSDOS_COMPILER */
2669
2670 #if MSDOS_COMPILER==WIN32C
WIN32put_fmt(constant char * fmt,int color)2671 static lbool WIN32put_fmt(constant char *fmt, int color)
2672 {
2673 char buf[INT_STRLEN_BOUND(int)+16];
2674 int len = (size_t) SNPRINTF1(buf, sizeof(buf), fmt, color);
2675 if (len > 0)
2676 WIN32textout(buf, (size_t) len);
2677 return TRUE;
2678 }
2679
win_set_cattr(CHAR_ATTR cattr)2680 static void win_set_cattr(CHAR_ATTR cattr)
2681 {
2682 if (cattr & CATTR_UNDERLINE)
2683 WIN32textout(ESCS"[4m", 4);
2684 if (cattr & CATTR_BOLD)
2685 WIN32textout(ESCS"[1m", 4);
2686 if (cattr & CATTR_BLINK)
2687 WIN32textout(ESCS"[5m", 4);
2688 if (cattr & CATTR_STANDOUT)
2689 WIN32textout(ESCS"[7m", 4);
2690 }
2691 #endif
2692
win_set_color(int attr)2693 static lbool win_set_color(int attr)
2694 {
2695 int fg;
2696 int bg;
2697 CHAR_ATTR cattr;
2698 lbool out = FALSE;
2699 constant char *str = get_color_map(attr);
2700 if (str == NULL || str[0] == '\0')
2701 return FALSE;
2702 switch (parse_color(str, &fg, &bg, &cattr))
2703 {
2704 case CT_4BIT:
2705 if (fg >= 0 && bg >= 0)
2706 {
2707 SETCOLORS(fg, bg);
2708 out = TRUE;
2709 } else if (fg >= 0)
2710 {
2711 SET_FG_COLOR(fg);
2712 out = TRUE;
2713 } else if (bg >= 0)
2714 {
2715 SET_BG_COLOR(bg);
2716 out = TRUE;
2717 }
2718 #if MSDOS_COMPILER==WIN32C
2719 if (vt_enabled)
2720 win_set_cattr(cattr);
2721 #endif
2722 break;
2723 #if MSDOS_COMPILER==WIN32C
2724 case CT_6BIT:
2725 if (vt_enabled)
2726 {
2727 if (fg > 0)
2728 out = WIN32put_fmt(ESCS"[38;5;%dm", fg);
2729 if (bg > 0)
2730 out = WIN32put_fmt(ESCS"[48;5;%dm", bg);
2731 win_set_cattr(cattr);
2732 }
2733 break;
2734 #endif
2735 default:
2736 break;
2737 }
2738 return out;
2739 }
2740
2741 #endif /* MSDOS_COMPILER */
2742
at_enter(int attr)2743 public void at_enter(int attr)
2744 {
2745 attr = apply_at_specials(attr);
2746 #if !MSDOS_COMPILER
2747 /* The one with the most priority is last. */
2748 tput_inmode(sc_u_in, attr, AT_UNDERLINE, putchr);
2749 tput_inmode(sc_b_in, attr, AT_BOLD, putchr);
2750 tput_inmode(sc_bl_in, attr, AT_BLINK, putchr);
2751 /* Don't use standout and color at the same time. */
2752 if (use_color && (attr & AT_COLOR))
2753 tput_color(get_color_map(attr), putchr);
2754 else
2755 tput_inmode(sc_s_in, attr, AT_STANDOUT, putchr);
2756 #else
2757 flush();
2758 /* The one with the most priority is first. */
2759 if ((attr & AT_COLOR) && use_color)
2760 {
2761 win_set_color(attr);
2762 } else if (attr & AT_STANDOUT)
2763 {
2764 SETCOLORS(so_fg_color, so_bg_color);
2765 } else if (attr & AT_BLINK)
2766 {
2767 SETCOLORS(bl_fg_color, bl_bg_color);
2768 } else if (attr & AT_BOLD)
2769 {
2770 SETCOLORS(bo_fg_color, bo_bg_color);
2771 } else if (attr & AT_UNDERLINE)
2772 {
2773 SETCOLORS(ul_fg_color, ul_bg_color);
2774 }
2775 #endif
2776 attrmode = attr;
2777 }
2778
at_exit(void)2779 public void at_exit(void)
2780 {
2781 #if !MSDOS_COMPILER
2782 /* Undo things in the reverse order we did them. */
2783 tput_color("*", putchr);
2784 tput_outmode(sc_s_out, AT_STANDOUT, putchr);
2785 tput_outmode(sc_bl_out, AT_BLINK, putchr);
2786 tput_outmode(sc_b_out, AT_BOLD, putchr);
2787 tput_outmode(sc_u_out, AT_UNDERLINE, putchr);
2788 #else
2789 flush();
2790 SETCOLORS(nm_fg_color, nm_bg_color);
2791 #endif
2792 attrmode = AT_NORMAL;
2793 }
2794
at_switch(int attr)2795 public void at_switch(int attr)
2796 {
2797 int new_attrmode = apply_at_specials(attr);
2798 int ignore_modes = AT_ANSI;
2799
2800 if ((new_attrmode & ~ignore_modes) != (attrmode & ~ignore_modes))
2801 {
2802 at_exit();
2803 at_enter(attr);
2804 }
2805 }
2806
is_at_equiv(int attr1,int attr2)2807 public lbool is_at_equiv(int attr1, int attr2)
2808 {
2809 attr1 = apply_at_specials(attr1);
2810 attr2 = apply_at_specials(attr2);
2811
2812 return (attr1 == attr2);
2813 }
2814
apply_at_specials(int attr)2815 public int apply_at_specials(int attr)
2816 {
2817 if (attr & AT_BINARY)
2818 attr |= binattr;
2819 if (attr & AT_HILITE)
2820 attr |= AT_STANDOUT;
2821 attr &= ~(AT_BINARY|AT_HILITE);
2822
2823 return attr;
2824 }
2825
2826 /*
2827 * Output a plain backspace, without erasing the previous char.
2828 */
putbs(void)2829 public void putbs(void)
2830 {
2831 if (termcap_debug)
2832 putstr("<bs>");
2833 else
2834 {
2835 #if !MSDOS_COMPILER
2836 ltputs(sc_backspace, 1, putchr);
2837 #else
2838 int row, col;
2839
2840 flush();
2841 {
2842 #if MSDOS_COMPILER==MSOFTC
2843 struct rccoord tpos;
2844 tpos = _gettextposition();
2845 row = tpos.row;
2846 col = tpos.col;
2847 #else
2848 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
2849 row = wherey();
2850 col = wherex();
2851 #else
2852 #if MSDOS_COMPILER==WIN32C
2853 CONSOLE_SCREEN_BUFFER_INFO scr;
2854 GetConsoleScreenBufferInfo(con_out, &scr);
2855 row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1;
2856 col = scr.dwCursorPosition.X - scr.srWindow.Left + 1;
2857 #endif
2858 #endif
2859 #endif
2860 }
2861 if (col <= 1)
2862 return;
2863 _settextposition(row, col-1);
2864 #endif /* MSDOS_COMPILER */
2865 }
2866 }
2867
2868 #if MSDOS_COMPILER==WIN32C
2869
2870 #define WIN32_MAX_REPEAT 3
2871 #define LAST_DOWN_COUNT 8
2872 static LWCHAR last_downs[LAST_DOWN_COUNT] = { 0 };
2873 static int last_down_index = 0;
2874 static LWCHAR hi_surr = 0;
2875
2876 typedef struct XINPUT_RECORD {
2877 INPUT_RECORD ir;
2878 LWCHAR ichar; /* because ir...UnicodeChar is only 16 bits */
2879 } XINPUT_RECORD;
2880
2881 typedef struct WIN32_CHAR {
2882 struct WIN32_CHAR *wc_next;
2883 char wc_ch;
2884 } WIN32_CHAR;
2885
2886 static WIN32_CHAR *win32_queue = NULL;
2887
2888 /*
2889 * Is the win32_queue nonempty?
2890 */
win32_queued_char(void)2891 static int win32_queued_char(void)
2892 {
2893 return (win32_queue != NULL);
2894 }
2895
2896 /*
2897 * Push a char onto the back of the win32_queue.
2898 */
win32_enqueue(char ch)2899 static void win32_enqueue(char ch)
2900 {
2901 WIN32_CHAR *wch = (WIN32_CHAR *) ecalloc(1, sizeof(WIN32_CHAR));
2902 wch->wc_ch = ch;
2903 wch->wc_next = NULL;
2904 if (win32_queue == NULL)
2905 win32_queue = wch;
2906 else
2907 {
2908 WIN32_CHAR *pch;
2909 for (pch = win32_queue; pch->wc_next != NULL; pch = pch->wc_next)
2910 continue;
2911 pch->wc_next = wch;
2912 }
2913 }
2914
2915 /*
2916 * Push a char onto the front of the win32_queue.
2917 * Makes the next call to WIN32getch return ch.
2918 */
WIN32ungetch(int ch)2919 public void WIN32ungetch(int ch)
2920 {
2921 WIN32_CHAR *wch = (WIN32_CHAR *) ecalloc(1, sizeof(WIN32_CHAR));
2922 wch->wc_ch = ch;
2923 wch->wc_next = win32_queue;
2924 win32_queue = wch;
2925 }
2926
2927 /*
2928 * Get a char from the front of the win32_queue.
2929 */
win32_get_queue(void)2930 static char win32_get_queue(void)
2931 {
2932 WIN32_CHAR *wch = win32_queue;
2933 char ch = wch->wc_ch;
2934 win32_queue = wch->wc_next;
2935 free(wch);
2936 return ch;
2937 }
2938
2939 /*
2940 * Handle a mouse input event.
2941 */
win32_mouse_event(XINPUT_RECORD * xip)2942 static lbool win32_mouse_event(XINPUT_RECORD *xip)
2943 {
2944 char b;
2945
2946 if (!mousecap || xip->ir.EventType != MOUSE_EVENT ||
2947 xip->ir.Event.MouseEvent.dwEventFlags == MOUSE_MOVED)
2948 return (FALSE);
2949
2950 /* Generate an X11 mouse sequence from the mouse event. */
2951 /* TODO: switch to the 1006 protocol to allow specific-button-up reports */
2952 switch (xip->ir.Event.MouseEvent.dwEventFlags)
2953 {
2954 case 0: /* press or release */
2955 if (xip->ir.Event.MouseEvent.dwButtonState == 0)
2956 b = X11MOUSE_OFFSET + X11MOUSE_BUTTON_REL;
2957 else if (xip->ir.Event.MouseEvent.dwButtonState == 1) /* leftmost */
2958 b = X11MOUSE_OFFSET + X11MOUSE_BUTTON1;
2959 else if (xip->ir.Event.MouseEvent.dwButtonState == 2) /* rightmost */
2960 b = X11MOUSE_OFFSET + X11MOUSE_BUTTON3;
2961 else if (xip->ir.Event.MouseEvent.dwButtonState == 4) /* middle ("next-to-leftmost") */
2962 b = X11MOUSE_OFFSET + X11MOUSE_BUTTON2;
2963 else /* don't bother to figure out what changed */
2964 return (FALSE);
2965 break;
2966 case MOUSE_WHEELED:
2967 b = X11MOUSE_OFFSET + (((int)xip->ir.Event.MouseEvent.dwButtonState < 0) ? X11MOUSE_WHEEL_DOWN : X11MOUSE_WHEEL_UP);
2968 break;
2969 default:
2970 return (FALSE);
2971 }
2972 /* {{ TODO: change to X11 1006 format. }} */
2973 win32_enqueue(ESC);
2974 win32_enqueue('[');
2975 win32_enqueue('M');
2976 win32_enqueue(b);
2977 win32_enqueue(X11MOUSE_OFFSET + xip->ir.Event.MouseEvent.dwMousePosition.X + 1);
2978 win32_enqueue(X11MOUSE_OFFSET + xip->ir.Event.MouseEvent.dwMousePosition.Y + 1);
2979 return (TRUE);
2980 }
2981
set_last_down(LWCHAR ch)2982 static void set_last_down(LWCHAR ch)
2983 {
2984 if (ch == 0) return;
2985 last_downs[last_down_index] = ch;
2986 if (++last_down_index >= LAST_DOWN_COUNT)
2987 last_down_index = 0;
2988 }
2989
find_last_down(LWCHAR ch)2990 static LWCHAR *find_last_down(LWCHAR ch)
2991 {
2992 int i;
2993 for (i = 0; i < LAST_DOWN_COUNT; ++i)
2994 if (last_downs[i] == ch)
2995 return &last_downs[i];
2996 return NULL;
2997 }
2998
2999 /*
3000 * Get an input char from an INPUT_RECORD and store in xip->ichar.
3001 * Handles surrogate chars, and KeyUp without previous corresponding KeyDown.
3002 */
win32_get_ichar(XINPUT_RECORD * xip)3003 static lbool win32_get_ichar(XINPUT_RECORD *xip)
3004 {
3005 LWCHAR ch = xip->ir.Event.KeyEvent.uChar.UnicodeChar;
3006 xip->ichar = ch;
3007 if (!is_ascii_char(ch))
3008 {
3009 int is_down = xip->ir.Event.KeyEvent.bKeyDown;
3010 LWCHAR *last_down = find_last_down(ch);
3011 if (last_down == NULL) { /* key was up */
3012 if (is_down) { /* key was up, now is down */
3013 set_last_down(ch);
3014 } else { /* key up without previous down: pretend this is a down. */
3015 xip->ir.Event.KeyEvent.bKeyDown = 1;
3016 }
3017 } else if (!is_down) { /* key was down, now is up */
3018 *last_down = 0; /* use this last_down only once */
3019 }
3020
3021 if (ch >= 0xD800 && ch < 0xDC00) { /* high surrogate */
3022 hi_surr = 0x10000 + ((ch - 0xD800) << 10);
3023 return (FALSE); /* get next input, which should be the low surrogate */
3024 }
3025 if (ch >= 0xDC00 && ch < 0xE000) { /* low surrogate */
3026 xip->ichar = hi_surr + (ch - 0xDC00);
3027 hi_surr = 0;
3028 }
3029 }
3030 return (TRUE);
3031 }
3032
3033 /*
3034 * Handle a scan code (non-ASCII) key input.
3035 */
win32_scan_code(XINPUT_RECORD * xip)3036 static lbool win32_scan_code(XINPUT_RECORD *xip)
3037 {
3038 int scan = -1;
3039 if (xip->ir.Event.KeyEvent.dwControlKeyState & (LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED))
3040 {
3041 switch (xip->ir.Event.KeyEvent.wVirtualScanCode)
3042 {
3043 case PCK_RIGHT: /* right arrow */
3044 scan = PCK_CTL_RIGHT;
3045 break;
3046 case PCK_LEFT: /* left arrow */
3047 scan = PCK_CTL_LEFT;
3048 break;
3049 case PCK_DELETE: /* delete */
3050 scan = PCK_CTL_DELETE;
3051 break;
3052 }
3053 } else if (xip->ir.Event.KeyEvent.dwControlKeyState & SHIFT_PRESSED)
3054 {
3055 if (xip->ichar == '\t')
3056 scan = PCK_SHIFT_TAB;
3057 }
3058 if (scan < 0 && xip->ichar == 0)
3059 scan = xip->ir.Event.KeyEvent.wVirtualScanCode;
3060 if (scan < 0)
3061 return (FALSE);
3062 /*
3063 * An extended key returns a 2 byte sequence consisting of
3064 * a zero byte followed by the scan code.
3065 */
3066 win32_enqueue('\0');
3067 win32_enqueue(scan);
3068 return (TRUE);
3069 }
3070
3071 /*
3072 * Handle a key input event.
3073 */
win32_key_event(XINPUT_RECORD * xip)3074 static lbool win32_key_event(XINPUT_RECORD *xip)
3075 {
3076 int repeat;
3077 char utf8[UTF8_MAX_LENGTH];
3078 char *up;
3079
3080 if (xip->ir.EventType != KEY_EVENT ||
3081 ((xip->ir.Event.KeyEvent.dwControlKeyState & (RIGHT_ALT_PRESSED|LEFT_CTRL_PRESSED)) == (RIGHT_ALT_PRESSED|LEFT_CTRL_PRESSED) && xip->ir.Event.KeyEvent.uChar.UnicodeChar == 0) ||
3082 (xip->ir.Event.KeyEvent.wVirtualScanCode == 0 && xip->ir.Event.KeyEvent.uChar.UnicodeChar == 0) ||
3083 xip->ir.Event.KeyEvent.wVirtualScanCode == PCK_CAPS_LOCK ||
3084 xip->ir.Event.KeyEvent.wVirtualScanCode == PCK_NUM_LOCK ||
3085 (xip->ir.Event.KeyEvent.wVirtualKeyCode == VK_MENU && xip->ir.Event.KeyEvent.uChar.UnicodeChar == 0) ||
3086 xip->ir.Event.KeyEvent.wVirtualKeyCode == VK_KANJI ||
3087 xip->ir.Event.KeyEvent.wVirtualKeyCode == VK_SHIFT ||
3088 xip->ir.Event.KeyEvent.wVirtualKeyCode == VK_CONTROL)
3089 return (FALSE);
3090
3091 if (!win32_get_ichar(xip))
3092 return (FALSE);
3093 if (!xip->ir.Event.KeyEvent.bKeyDown)
3094 return (FALSE);
3095
3096 if (win32_scan_code(xip))
3097 return (TRUE);
3098
3099 repeat = xip->ir.Event.KeyEvent.wRepeatCount;
3100 if (repeat > WIN32_MAX_REPEAT)
3101 repeat = WIN32_MAX_REPEAT;
3102 up = utf8;
3103 put_wchar(&up, xip->ichar);
3104 for (; repeat > 0; --repeat)
3105 {
3106 constant char *p;
3107 for (p = utf8; p < up; ++p)
3108 win32_enqueue(*p);
3109 }
3110 return (TRUE);
3111 }
3112
3113 /*
3114 * Determine whether an input character is waiting to be read.
3115 */
win32_kbhit(void)3116 public lbool win32_kbhit(void)
3117 {
3118 XINPUT_RECORD xip;
3119
3120 if (win32_queued_char())
3121 return (TRUE);
3122
3123 for (;;)
3124 {
3125 DWORD nread;
3126 DWORD console_input_mode;
3127 /*
3128 * When an input pipe closes, cmd may reset the console mode,
3129 * so set the mode every time we read input.
3130 */
3131 if (GetConsoleMode(tty, &console_input_mode) && console_input_mode != curr_console_input_mode)
3132 SetConsoleMode(tty, curr_console_input_mode);
3133 PeekConsoleInputW(tty, &xip.ir, 1, &nread);
3134 if (nread == 0)
3135 return (FALSE);
3136 ReadConsoleInputW(tty, &xip.ir, 1, &nread);
3137 if (nread == 0)
3138 return (FALSE);
3139 if (win32_mouse_event(&xip) || win32_key_event(&xip))
3140 break;
3141 }
3142 return (TRUE);
3143 }
3144
3145 /*
3146 * Read a character from the keyboard.
3147 */
WIN32getch(void)3148 public char WIN32getch(void)
3149 {
3150 while (!win32_kbhit())
3151 {
3152 Sleep(20);
3153 if (ABORT_SIGS())
3154 return ('\003');
3155 }
3156 return (win32_get_queue());
3157 }
3158
win32_getch_clear(void)3159 public void win32_getch_clear(void)
3160 {
3161 while (win32_kbhit())
3162 (void) WIN32getch();
3163 }
3164
3165 #endif /* MSDOS_COMPILER==WIN32C */
3166
3167 #if MSDOS_COMPILER
3168 /*
3169 */
WIN32setcolors(int fg,int bg)3170 public void WIN32setcolors(int fg, int bg)
3171 {
3172 SETCOLORS(fg, bg);
3173 }
3174
3175 /*
3176 */
WIN32textout(constant char * text,size_t len)3177 public void WIN32textout(constant char *text, size_t len)
3178 {
3179 #if MSDOS_COMPILER==WIN32C
3180 DWORD written;
3181 if (utf_mode == 2)
3182 {
3183 /*
3184 * We've got UTF-8 text in a non-UTF-8 console. Convert it to
3185 * wide and use WriteConsoleW.
3186 */
3187 WCHAR wtext[1024];
3188 len = MultiByteToWideChar(CP_UTF8, 0, text, len, wtext, countof(wtext));
3189 WriteConsoleW(con_out, wtext, len, &written, NULL);
3190 } else
3191 WriteConsole(con_out, text, len, &written, NULL);
3192 #else
3193 char buf[2048];
3194 if (len >= sizeof(buf))
3195 len = sizeof(buf) - 1;
3196 memcpy(buf, text, len);
3197 buf[len] = 0;
3198 cputs(buf);
3199 #endif
3200 }
3201 #endif
3202