1 /*
2 * Copyright (C) 1984-2025 Mark Nudelman
3 *
4 * You may distribute under the terms of either the GNU General Public
5 * License or the Less License, as specified in the README file.
6 *
7 * For more information, see the README file.
8 */
9
10
11 /*
12 * Routines which deal with the characteristics of the terminal.
13 * Uses termcap to be as terminal-independent as possible.
14 */
15
16 #include "less.h"
17 #include "cmd.h"
18
19 #if MSDOS_COMPILER
20 #include "pckeys.h"
21 #if MSDOS_COMPILER==MSOFTC
22 #include <graph.h>
23 #else
24 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
25 #include <conio.h>
26 #if MSDOS_COMPILER==DJGPPC
27 #include <pc.h>
28 extern int fd0;
29 #endif
30 #else
31 #if MSDOS_COMPILER==WIN32C
32 #include <windows.h>
33 #endif
34 #endif
35 #endif
36 #include <time.h>
37
38 #ifndef FOREGROUND_BLUE
39 #define FOREGROUND_BLUE 0x0001
40 #endif
41 #ifndef FOREGROUND_GREEN
42 #define FOREGROUND_GREEN 0x0002
43 #endif
44 #ifndef FOREGROUND_RED
45 #define FOREGROUND_RED 0x0004
46 #endif
47 #ifndef FOREGROUND_INTENSITY
48 #define FOREGROUND_INTENSITY 0x0008
49 #endif
50
51 #else
52
53 #if HAVE_SYS_IOCTL_H
54 #include <sys/ioctl.h>
55 #endif
56
57 #if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS
58 #include <termios.h>
59 #else
60 #if HAVE_TERMIO_H
61 #include <termio.h>
62 #else
63 #if HAVE_SGSTAT_H
64 #include <sgstat.h>
65 #else
66 #include <sgtty.h>
67 #endif
68 #endif
69 #endif
70
71 #if HAVE_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 lbool 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_s_bracketed_paste, /* Start bracketed paste mode */
223 *sc_e_bracketed_paste, /* End bracketed paste mode */
224 *sc_suspend, /* Suspend screen updates */
225 *sc_resume, /* Resume screen updates */
226 *sc_init, /* Startup terminal initialization */
227 *sc_deinit; /* Exit terminal de-initialization */
228
229 static int attrcolor = -1;
230 #endif
231
232 static int init_done = 0;
233
234 public int auto_wrap; /* Terminal does \r\n when write past margin */
235 public int ignaw; /* Terminal ignores \n immediately after wrap */
236 public int erase_char; /* The user's erase char */
237 public int erase2_char; /* The user's other erase char */
238 public int kill_char; /* The user's line-kill char */
239 public int werase_char; /* The user's word-erase char */
240 public int sc_width, sc_height; /* Height & width of screen */
241 public int bo_s_width, bo_e_width; /* Printing width of boldface seq */
242 public int ul_s_width, ul_e_width; /* Printing width of underline seq */
243 public int so_s_width, so_e_width; /* Printing width of standout seq */
244 public int bl_s_width, bl_e_width; /* Printing width of blink seq */
245 public int above_mem, below_mem; /* Memory retained above/below screen */
246 public int can_goto_line; /* Can move cursor to any line */
247 public int clear_bg; /* Clear fills with background color */
248 public lbool missing_cap = FALSE; /* Some capability is missing */
249 public constant char *kent = NULL; /* Keypad ENTER sequence */
250 public lbool term_init_done = FALSE;
251 public lbool full_screen = TRUE;
252
253 static int attrmode = AT_NORMAL;
254 static int termcap_debug = -1;
255 static int no_alt_screen; /* sc_init does not switch to alt screen */
256 extern int binattr;
257 extern int one_screen;
258 extern int shell_lines;
259
260 #if !MSDOS_COMPILER
261 static constant char *cheaper(constant char *t1, constant char *t2, constant char *def);
262 static void tmodes(constant char *incap, constant char *outcap, constant char **instr,
263 constant char **outstr, constant char *def_instr, constant char *def_outstr, char **spp);
264 #endif
265
266 /*
267 * These two variables are sometimes defined in,
268 * and needed by, the termcap library.
269 */
270 #if MUST_DEFINE_OSPEED
271 extern short ospeed; /* Terminal output baud rate */
272 extern char PC; /* Pad character */
273 #endif
274 #ifdef _OSK
275 short ospeed;
276 char PC_, *UP, *BC;
277 #endif
278
279 extern int quiet; /* If VERY_QUIET, use visual bell for bell */
280 extern int no_vbell;
281 extern int no_back_scroll;
282 extern int no_init;
283 extern int no_keypad;
284 extern int sigs;
285 extern int top_scroll;
286 extern int quit_if_one_screen;
287 extern int oldbot;
288 extern int mousecap;
289 extern int is_tty;
290 extern int use_color;
291 extern int no_paste;
292 #if HILITE_SEARCH
293 extern int hilite_search;
294 #endif
295 #if MSDOS_COMPILER==WIN32C
296 extern int wscroll;
297 extern HANDLE tty;
298 #else
299 extern int tty;
300 #endif
301
302 #if (HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS) || defined(TCGETA)
303 /*
304 * Set termio flags for use by less.
305 */
set_termio_flags(struct termios * s)306 static void set_termio_flags(
307 #if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS
308 struct termios *s
309 #else
310 struct termio *s
311 #endif
312 )
313 {
314 s->c_lflag &= ~(0
315 #ifdef ICANON
316 | ICANON
317 #endif
318 #ifdef ECHO
319 | ECHO
320 #endif
321 #ifdef ECHOE
322 | ECHOE
323 #endif
324 #ifdef ECHOK
325 | ECHOK
326 #endif
327 #ifdef ECHONL
328 | ECHONL
329 #endif
330 );
331
332 s->c_oflag |= (0
333 #ifdef OPOST
334 | OPOST
335 #endif
336 #ifdef ONLCR
337 | ONLCR
338 #endif
339 );
340
341 s->c_oflag &= ~(0
342 #ifdef ONOEOT
343 | ONOEOT
344 #endif
345 #ifdef OCRNL
346 | OCRNL
347 #endif
348 #ifdef ONOCR
349 | ONOCR
350 #endif
351 #ifdef ONLRET
352 | ONLRET
353 #endif
354 );
355 }
356 #endif
357
358 /*
359 * Change terminal to "raw mode", or restore to "normal" mode.
360 * "Raw mode" means
361 * 1. An outstanding read will complete on receipt of a single keystroke.
362 * 2. Input is not echoed.
363 * 3. On output, \n is mapped to \r\n.
364 * 4. \t is NOT expanded into spaces.
365 * 5. Signal-causing characters such as ctrl-C (interrupt),
366 * etc. are NOT disabled.
367 * It doesn't matter whether an input \n is mapped to \r, or vice versa.
368 */
raw_mode(int on)369 public void raw_mode(int on)
370 {
371 static int curr_on = 0;
372
373 if (on == curr_on)
374 return;
375 erase2_char = '\b'; /* in case OS doesn't know about erase2 */
376 #if LESSTEST
377 if (is_lesstest())
378 {
379 /* {{ For consistent conditions when running tests. }} */
380 erase_char = '\b';
381 kill_char = CONTROL('U');
382 werase_char = CONTROL('W');
383 } else
384 #endif /*LESSTEST*/
385 #if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS
386 {
387 struct termios s;
388 static struct termios save_term;
389 static int saved_term = 0;
390
391 if (on)
392 {
393 /*
394 * Get terminal modes.
395 */
396 if (tcgetattr(tty, &s) < 0)
397 {
398 erase_char = '\b';
399 kill_char = CONTROL('U');
400 werase_char = CONTROL('W');
401 } else
402 {
403 /*
404 * Save modes and set certain variables dependent on modes.
405 */
406 if (!saved_term)
407 {
408 save_term = s;
409 saved_term = 1;
410 }
411 #if HAVE_OSPEED
412 switch (cfgetospeed(&s))
413 {
414 #ifdef B0
415 case B0: ospeed = 0; break;
416 #endif
417 #ifdef B50
418 case B50: ospeed = 1; break;
419 #endif
420 #ifdef B75
421 case B75: ospeed = 2; break;
422 #endif
423 #ifdef B110
424 case B110: ospeed = 3; break;
425 #endif
426 #ifdef B134
427 case B134: ospeed = 4; break;
428 #endif
429 #ifdef B150
430 case B150: ospeed = 5; break;
431 #endif
432 #ifdef B200
433 case B200: ospeed = 6; break;
434 #endif
435 #ifdef B300
436 case B300: ospeed = 7; break;
437 #endif
438 #ifdef B600
439 case B600: ospeed = 8; break;
440 #endif
441 #ifdef B1200
442 case B1200: ospeed = 9; break;
443 #endif
444 #ifdef B1800
445 case B1800: ospeed = 10; break;
446 #endif
447 #ifdef B2400
448 case B2400: ospeed = 11; break;
449 #endif
450 #ifdef B4800
451 case B4800: ospeed = 12; break;
452 #endif
453 #ifdef B9600
454 case B9600: ospeed = 13; break;
455 #endif
456 #ifdef EXTA
457 case EXTA: ospeed = 14; break;
458 #endif
459 #ifdef EXTB
460 case EXTB: ospeed = 15; break;
461 #endif
462 #ifdef B57600
463 case B57600: ospeed = 16; break;
464 #endif
465 #ifdef B115200
466 case B115200: ospeed = 17; break;
467 #endif
468 default: ;
469 }
470 #endif
471 erase_char = s.c_cc[VERASE];
472 #ifdef VERASE2
473 erase2_char = s.c_cc[VERASE2];
474 #endif
475 kill_char = s.c_cc[VKILL];
476 #ifdef VWERASE
477 werase_char = s.c_cc[VWERASE];
478 #else
479 werase_char = CONTROL('W');
480 #endif
481
482 /*
483 * Set the modes to the way we want them.
484 */
485 set_termio_flags(&s);
486 s.c_cc[VMIN] = 1;
487 s.c_cc[VTIME] = 0;
488 #ifdef VLNEXT
489 s.c_cc[VLNEXT] = 0;
490 #endif
491 #ifdef VDSUSP
492 s.c_cc[VDSUSP] = 0;
493 #endif
494 #ifdef VSTOP
495 s.c_cc[VSTOP] = 0;
496 #endif
497 #ifdef VSTART
498 s.c_cc[VSTART] = 0;
499 #endif
500 #ifdef VDISCARD
501 s.c_cc[VDISCARD] = 0;
502 #endif
503 #if MUST_SET_LINE_DISCIPLINE
504 /*
505 * System's termios is broken; need to explicitly
506 * request TERMIODISC line discipline.
507 */
508 s.c_line = TERMIODISC;
509 #endif
510 }
511 } else
512 {
513 /*
514 * Restore saved modes.
515 */
516 s = save_term;
517 }
518 #if HAVE_FSYNC
519 fsync(tty);
520 #endif
521 tcsetattr(tty, TCSADRAIN, &s);
522 #if MUST_SET_LINE_DISCIPLINE
523 if (!on)
524 {
525 /*
526 * Broken termios *ignores* any line discipline
527 * except TERMIODISC. A different old line discipline
528 * is therefore not restored, yet. Restore the old
529 * line discipline by hand.
530 */
531 ioctl(tty, TIOCSETD, &save_term.c_line);
532 }
533 #endif
534 }
535 #else
536 #ifdef TCGETA
537 {
538 struct termio s;
539 static struct termio save_term;
540 static int saved_term = 0;
541
542 if (on)
543 {
544 /*
545 * Get terminal modes.
546 */
547 ioctl(tty, TCGETA, &s);
548
549 /*
550 * Save modes and set certain variables dependent on modes.
551 */
552 if (!saved_term)
553 {
554 save_term = s;
555 saved_term = 1;
556 }
557 #if HAVE_OSPEED
558 ospeed = s.c_cflag & CBAUD;
559 #endif
560 erase_char = s.c_cc[VERASE];
561 kill_char = s.c_cc[VKILL];
562 #ifdef VWERASE
563 werase_char = s.c_cc[VWERASE];
564 #else
565 werase_char = CONTROL('W');
566 #endif
567
568 /*
569 * Set the modes to the way we want them.
570 */
571 set_termio_flags(&s);
572 s.c_cc[VMIN] = 1;
573 s.c_cc[VTIME] = 0;
574 #ifdef VSTOP
575 s.c_cc[VSTOP] = 0;
576 #endif
577 #ifdef VSTART
578 s.c_cc[VSTART] = 0;
579 #endif
580 } else
581 {
582 /*
583 * Restore saved modes.
584 */
585 s = save_term;
586 }
587 ioctl(tty, TCSETAW, &s);
588 }
589 #else
590 #ifdef TIOCGETP
591 {
592 struct sgttyb s;
593 static struct sgttyb save_term;
594 static int saved_term = 0;
595
596 if (on)
597 {
598 /*
599 * Get terminal modes.
600 */
601 ioctl(tty, TIOCGETP, &s);
602
603 /*
604 * Save modes and set certain variables dependent on modes.
605 */
606 if (!saved_term)
607 {
608 save_term = s;
609 saved_term = 1;
610 }
611 #if HAVE_OSPEED
612 ospeed = s.sg_ospeed;
613 #endif
614 erase_char = s.sg_erase;
615 kill_char = s.sg_kill;
616 werase_char = CONTROL('W');
617
618 /*
619 * Set the modes to the way we want them.
620 */
621 s.sg_flags |= CBREAK;
622 s.sg_flags &= ~(ECHO);
623 } else
624 {
625 /*
626 * Restore saved modes.
627 */
628 s = save_term;
629 }
630 ioctl(tty, TIOCSETN, &s);
631 }
632 #else
633 #ifdef _OSK
634 {
635 struct sgbuf s;
636 static struct sgbuf save_term;
637 static int saved_term = 0;
638
639 if (on)
640 {
641 /*
642 * Get terminal modes.
643 */
644 _gs_opt(tty, &s);
645
646 /*
647 * Save modes and set certain variables dependent on modes.
648 */
649 if (!saved_term)
650 {
651 save_term = s;
652 saved_term = 1;
653 }
654 erase_char = s.sg_bspch;
655 kill_char = s.sg_dlnch;
656 werase_char = CONTROL('W');
657
658 /*
659 * Set the modes to the way we want them.
660 */
661 s.sg_echo = 0;
662 s.sg_eofch = 0;
663 s.sg_pause = 0;
664 s.sg_psch = 0;
665 } else
666 {
667 /*
668 * Restore saved modes.
669 */
670 s = save_term;
671 }
672 _ss_opt(tty, &s);
673 }
674 #else
675 /* MS-DOS, Windows, or OS2 */
676 #if OS2
677 /* OS2 */
678 LSIGNAL(SIGINT, SIG_IGN);
679 #endif
680 erase_char = '\b';
681 #if MSDOS_COMPILER==DJGPPC
682 kill_char = CONTROL('U');
683 /*
684 * So that when we shell out or run another program, its
685 * stdin is in cooked mode. We do not switch stdin to binary
686 * mode if fd0 is zero, since that means we were called before
687 * tty was reopened in open_getchr, in which case we would be
688 * changing the original stdin device outside less.
689 */
690 if (fd0 != 0)
691 setmode(0, on ? O_BINARY : O_TEXT);
692 #else
693 kill_char = ESC;
694 #endif
695 werase_char = CONTROL('W');
696 #endif
697 #endif
698 #endif
699 #endif
700 curr_on = on;
701 }
702
703 #if !MSDOS_COMPILER
704 /*
705 * Some glue to prevent calling termcap functions if tgetent() failed.
706 */
707 static int hardcopy;
708
ltget_env(constant char * capname)709 static constant char * ltget_env(constant char *capname)
710 {
711 char name[64];
712
713 if (termcap_debug)
714 {
715 struct env { struct env *next; char *name; char *value; };
716 static struct env *envs = NULL;
717 struct env *p;
718 for (p = envs; p != NULL; p = p->next)
719 if (strcmp(p->name, capname) == 0)
720 return p->value;
721 p = (struct env *) ecalloc(1, sizeof(struct env));
722 p->name = save(capname);
723 p->value = (char *) ecalloc(strlen(capname)+3, sizeof(char));
724 sprintf(p->value, "<%s>", capname);
725 p->next = envs;
726 envs = p;
727 return p->value;
728 }
729 SNPRINTF1(name, sizeof(name), "LESS_TERMCAP_%s", capname);
730 return (lgetenv(name));
731 }
732
ltgetflag(constant char * capname)733 static int ltgetflag(constant char *capname)
734 {
735 constant char *s;
736
737 if ((s = ltget_env(capname)) != NULL)
738 return (*s != '\0' && *s != '0');
739 if (hardcopy)
740 return (0);
741 return (tgetflag(capname));
742 }
743
ltgetnum(constant char * capname)744 static int ltgetnum(constant char *capname)
745 {
746 constant char *s;
747
748 if ((s = ltget_env(capname)) != NULL)
749 return (atoi(s));
750 if (hardcopy)
751 return (-1);
752 return (tgetnum(capname));
753 }
754
ltgetstr(constant char * capname,char ** pp)755 static constant char * ltgetstr(constant char *capname, char **pp)
756 {
757 constant char *s;
758
759 if ((s = ltget_env(capname)) != NULL)
760 return (s);
761 if (hardcopy)
762 return (NULL);
763 return (tgetstr(capname, pp));
764 }
765 #endif /* MSDOS_COMPILER */
766
767 /*
768 * Get size of the output screen.
769 */
scrsize(void)770 static void scrsize(void)
771 {
772 constant char *s;
773 int sys_height;
774 int sys_width;
775 #if !MSDOS_COMPILER
776 int n;
777 #endif
778
779 #define DEF_SC_WIDTH 80
780 #if MSDOS_COMPILER
781 #define DEF_SC_HEIGHT 25
782 #else
783 #define DEF_SC_HEIGHT 24
784 #endif
785
786
787 sys_width = sys_height = 0;
788
789 #if LESSTEST
790 if (0) /* can't use is_lesstest(): ttyin_name may not be set by scan_option yet */
791 #endif /*LESSTEST*/
792 {
793 #if MSDOS_COMPILER==MSOFTC
794 {
795 struct videoconfig w;
796 _getvideoconfig(&w);
797 sys_height = w.numtextrows;
798 sys_width = w.numtextcols;
799 }
800 #else
801 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
802 {
803 struct text_info w;
804 gettextinfo(&w);
805 sys_height = w.screenheight;
806 sys_width = w.screenwidth;
807 }
808 #else
809 #if MSDOS_COMPILER==WIN32C
810 {
811 CONSOLE_SCREEN_BUFFER_INFO scr;
812 GetConsoleScreenBufferInfo(con_out, &scr);
813 sys_height = scr.srWindow.Bottom - scr.srWindow.Top + 1;
814 sys_width = scr.srWindow.Right - scr.srWindow.Left + 1;
815 }
816 #else
817 #if OS2
818 {
819 int s[2];
820 _scrsize(s);
821 sys_width = s[0];
822 sys_height = s[1];
823 /*
824 * When using terminal emulators for XFree86/OS2, the
825 * _scrsize function does not work well.
826 * Call the scrsize.exe program to get the window size.
827 */
828 windowid = getenv("WINDOWID");
829 if (windowid != NULL)
830 {
831 FILE *fd = popen("scrsize", "rt");
832 if (fd != NULL)
833 {
834 int w, h;
835 fscanf(fd, "%i %i", &w, &h);
836 if (w > 0 && h > 0)
837 {
838 sys_width = w;
839 sys_height = h;
840 }
841 pclose(fd);
842 }
843 }
844 }
845 #else
846 #ifdef TIOCGWINSZ
847 {
848 struct winsize w;
849 if (ioctl(2, TIOCGWINSZ, &w) == 0)
850 {
851 if (w.ws_row > 0)
852 sys_height = w.ws_row;
853 if (w.ws_col > 0)
854 sys_width = w.ws_col;
855 }
856 }
857 #else
858 #ifdef WIOCGETD
859 {
860 struct uwdata w;
861 if (ioctl(2, WIOCGETD, &w) == 0)
862 {
863 if (w.uw_height > 0)
864 sys_height = w.uw_height / w.uw_vs;
865 if (w.uw_width > 0)
866 sys_width = w.uw_width / w.uw_hs;
867 }
868 }
869 #endif
870 #endif
871 #endif
872 #endif
873 #endif
874 #endif
875 }
876
877 if (sys_height > 0)
878 sc_height = sys_height;
879 else if ((s = lgetenv("LINES")) != NULL)
880 sc_height = atoi(s);
881 #if !MSDOS_COMPILER
882 else if ((n = ltgetnum("li")) > 0)
883 sc_height = n;
884 #endif
885 if ((s = lgetenv("LESS_LINES")) != NULL)
886 {
887 int height = atoi(s);
888 sc_height = (height < 0) ? sc_height + height : height;
889 full_screen = FALSE;
890 }
891 if (sc_height <= 0)
892 sc_height = DEF_SC_HEIGHT;
893
894 if (sys_width > 0)
895 sc_width = sys_width;
896 else if ((s = lgetenv("COLUMNS")) != NULL)
897 sc_width = atoi(s);
898 #if !MSDOS_COMPILER
899 else if ((n = ltgetnum("co")) > 0)
900 sc_width = n;
901 #endif
902 if ((s = lgetenv("LESS_COLUMNS")) != NULL)
903 {
904 int width = atoi(s);
905 sc_width = (width < 0) ? sc_width + width : width;
906 }
907 if (sc_width <= 0)
908 sc_width = DEF_SC_WIDTH;
909 screen_size_changed();
910 }
911
912 /*
913 * Recalculate things that depend on the screen size.
914 */
screen_size_changed(void)915 public void screen_size_changed(void)
916 {
917 calc_jump_sline();
918 calc_shift_count();
919 calc_match_shift();
920 }
921
922 #if MSDOS_COMPILER==MSOFTC
923 /*
924 * Figure out how many empty loops it takes to delay a millisecond.
925 */
get_clock(void)926 static void get_clock(void)
927 {
928 clock_t start;
929
930 /*
931 * Get synchronized at the start of a tick.
932 */
933 start = clock();
934 while (clock() == start)
935 ;
936 /*
937 * Now count loops till the next tick.
938 */
939 start = clock();
940 msec_loops = 0;
941 while (clock() == start)
942 msec_loops++;
943 /*
944 * Convert from (loops per clock) to (loops per millisecond).
945 */
946 msec_loops *= CLOCKS_PER_SEC;
947 msec_loops /= 1000;
948 }
949
950 /*
951 * Delay for a specified number of milliseconds.
952 */
delay(int msec)953 static void delay(int msec)
954 {
955 long i;
956
957 while (msec-- > 0)
958 {
959 for (i = 0; i < msec_loops; i++)
960 (void) clock();
961 }
962 }
963 #endif
964
965 /*
966 * Return the characters actually input by a "special" key.
967 */
special_key_str(int key)968 public constant char * special_key_str(int key)
969 {
970 static char tbuf[40];
971 constant char *s;
972 #if MSDOS_COMPILER || OS2
973 static char k_right[] = { '\340', PCK_RIGHT, 0 };
974 static char k_left[] = { '\340', PCK_LEFT, 0 };
975 static char k_ctl_right[] = { '\340', PCK_CTL_RIGHT, 0 };
976 static char k_ctl_left[] = { '\340', PCK_CTL_LEFT, 0 };
977 static char k_insert[] = { '\340', PCK_INSERT, 0 };
978 static char k_delete[] = { '\340', PCK_DELETE, 0 };
979 static char k_ctl_delete[] = { '\340', PCK_CTL_DELETE, 0 };
980 static char k_ctl_backspace[] = { '\177', 0 };
981 static char k_backspace[] = { '\b', 0 };
982 static char k_home[] = { '\340', PCK_HOME, 0 };
983 static char k_end[] = { '\340', PCK_END, 0 };
984 static char k_up[] = { '\340', PCK_UP, 0 };
985 static char k_down[] = { '\340', PCK_DOWN, 0 };
986 static char k_backtab[] = { '\340', PCK_SHIFT_TAB, 0 };
987 static char k_pagedown[] = { '\340', PCK_PAGEDOWN, 0 };
988 static char k_pageup[] = { '\340', PCK_PAGEUP, 0 };
989 static char k_f1[] = { '\340', PCK_F1, 0 };
990 #endif
991 #if !MSDOS_COMPILER
992 char *sp = tbuf;
993 #endif
994
995 switch (key)
996 {
997 #if OS2
998 /*
999 * If windowid is not NULL, assume less is executed in
1000 * the XFree86 environment.
1001 */
1002 case SK_RIGHT_ARROW:
1003 s = windowid ? ltgetstr("kr", &sp) : k_right;
1004 break;
1005 case SK_LEFT_ARROW:
1006 s = windowid ? ltgetstr("kl", &sp) : k_left;
1007 break;
1008 case SK_UP_ARROW:
1009 s = windowid ? ltgetstr("ku", &sp) : k_up;
1010 break;
1011 case SK_DOWN_ARROW:
1012 s = windowid ? ltgetstr("kd", &sp) : k_down;
1013 break;
1014 case SK_PAGE_UP:
1015 s = windowid ? ltgetstr("kP", &sp) : k_pageup;
1016 break;
1017 case SK_PAGE_DOWN:
1018 s = windowid ? ltgetstr("kN", &sp) : k_pagedown;
1019 break;
1020 case SK_HOME:
1021 s = windowid ? ltgetstr("kh", &sp) : k_home;
1022 break;
1023 case SK_END:
1024 s = windowid ? ltgetstr("@7", &sp) : k_end;
1025 break;
1026 case SK_DELETE:
1027 s = windowid ? ltgetstr("kD", &sp) : k_delete;
1028 if (s == NULL)
1029 {
1030 tbuf[0] = '\177';
1031 tbuf[1] = '\0';
1032 s = tbuf;
1033 }
1034 break;
1035 #endif
1036 #if MSDOS_COMPILER
1037 case SK_RIGHT_ARROW:
1038 s = k_right;
1039 break;
1040 case SK_LEFT_ARROW:
1041 s = k_left;
1042 break;
1043 case SK_UP_ARROW:
1044 s = k_up;
1045 break;
1046 case SK_DOWN_ARROW:
1047 s = k_down;
1048 break;
1049 case SK_PAGE_UP:
1050 s = k_pageup;
1051 break;
1052 case SK_PAGE_DOWN:
1053 s = k_pagedown;
1054 break;
1055 case SK_HOME:
1056 s = k_home;
1057 break;
1058 case SK_END:
1059 s = k_end;
1060 break;
1061 case SK_DELETE:
1062 s = k_delete;
1063 break;
1064 #endif
1065 #if MSDOS_COMPILER || OS2
1066 case SK_INSERT:
1067 s = k_insert;
1068 break;
1069 case SK_CTL_LEFT_ARROW:
1070 s = k_ctl_left;
1071 break;
1072 case SK_CTL_RIGHT_ARROW:
1073 s = k_ctl_right;
1074 break;
1075 case SK_CTL_BACKSPACE:
1076 s = k_ctl_backspace;
1077 break;
1078 case SK_CTL_DELETE:
1079 s = k_ctl_delete;
1080 break;
1081 case SK_BACKSPACE:
1082 s = k_backspace;
1083 break;
1084 case SK_F1:
1085 s = k_f1;
1086 break;
1087 case SK_BACKTAB:
1088 s = k_backtab;
1089 break;
1090 #else
1091 case SK_RIGHT_ARROW:
1092 s = ltgetstr("kr", &sp);
1093 break;
1094 case SK_LEFT_ARROW:
1095 s = ltgetstr("kl", &sp);
1096 break;
1097 case SK_UP_ARROW:
1098 s = ltgetstr("ku", &sp);
1099 break;
1100 case SK_DOWN_ARROW:
1101 s = ltgetstr("kd", &sp);
1102 break;
1103 case SK_PAGE_UP:
1104 s = ltgetstr("kP", &sp);
1105 break;
1106 case SK_PAGE_DOWN:
1107 s = ltgetstr("kN", &sp);
1108 break;
1109 case SK_HOME:
1110 s = ltgetstr("kh", &sp);
1111 break;
1112 case SK_END:
1113 s = ltgetstr("@7", &sp);
1114 break;
1115 case SK_DELETE:
1116 s = ltgetstr("kD", &sp);
1117 if (s == NULL)
1118 {
1119 tbuf[0] = '\177';
1120 tbuf[1] = '\0';
1121 s = tbuf;
1122 }
1123 break;
1124 case SK_BACKSPACE:
1125 s = ltgetstr("kb", &sp);
1126 if (s == NULL)
1127 {
1128 tbuf[0] = '\b';
1129 tbuf[1] = '\0';
1130 s = tbuf;
1131 }
1132 break;
1133 #endif
1134 case SK_CONTROL_K:
1135 tbuf[0] = CONTROL('K');
1136 tbuf[1] = '\0';
1137 s = tbuf;
1138 break;
1139 default:
1140 return (NULL);
1141 }
1142 return (s);
1143 }
1144
1145 #if MSDOS_COMPILER
init_win_colors(void)1146 public void init_win_colors(void)
1147 {
1148 if (nm_fg_color == CV_ERROR || nm_fg_color == CV_NOCHANGE) nm_fg_color = sy_fg_color;
1149 if (nm_bg_color == CV_ERROR || nm_bg_color == CV_NOCHANGE) nm_bg_color = sy_bg_color;
1150 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;
1151 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;
1152 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;
1153 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;
1154 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;
1155 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;
1156 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;
1157 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;
1158 nm_fg_color |= nm_attr;
1159 bo_fg_color |= bo_attr;
1160 ul_fg_color |= ul_attr;
1161 so_fg_color |= so_attr;
1162 bl_fg_color |= bl_attr;
1163 }
1164 #endif /* MSDOS_COMPILER */
1165
1166 /*
1167 * Get terminal capabilities via termcap.
1168 */
get_term(void)1169 public void get_term(void)
1170 {
1171 termcap_debug = !isnullenv(lgetenv("LESS_TERMCAP_DEBUG"));
1172 #if MSDOS_COMPILER
1173 auto_wrap = 1;
1174 ignaw = 0;
1175 can_goto_line = 1;
1176 clear_bg = 1;
1177 /*
1178 * Set up default colors.
1179 * The xx_s_width and xx_e_width vars are already initialized to 0.
1180 */
1181 #if MSDOS_COMPILER==MSOFTC
1182 sy_bg_color = _getbkcolor();
1183 sy_fg_color = _gettextcolor();
1184 get_clock();
1185 #else
1186 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1187 {
1188 struct text_info w;
1189 gettextinfo(&w);
1190 sy_bg_color = (w.attribute >> 4) & 0x0F;
1191 sy_fg_color = (w.attribute >> 0) & 0x0F;
1192 }
1193 #else
1194 #if MSDOS_COMPILER==WIN32C
1195 {
1196 CONSOLE_SCREEN_BUFFER_INFO scr;
1197
1198 con_out_save = con_out = GetStdHandle(STD_OUTPUT_HANDLE);
1199 /*
1200 * Always open stdin in binary. Note this *must* be done
1201 * before any file operations have been done on fd0.
1202 */
1203 SET_BINARY(0);
1204 GetConsoleMode(con_out, &init_console_output_mode);
1205 GetConsoleScreenBufferInfo(con_out, &scr);
1206 curr_attr = scr.wAttributes;
1207 sy_bg_color = (curr_attr & BG_COLORS) >> 4; /* normalize */
1208 sy_fg_color = curr_attr & FG_COLORS;
1209 }
1210 #endif
1211 #endif
1212 #endif
1213 init_win_colors();
1214
1215 /*
1216 * Get size of the screen.
1217 */
1218 scrsize();
1219 pos_init();
1220
1221 #else /* !MSDOS_COMPILER */
1222 {
1223 char *sp;
1224 constant char *t1;
1225 constant char *t2;
1226 constant char *term;
1227 /*
1228 * Some termcap libraries assume termbuf is static
1229 * (accessible after tgetent returns).
1230 */
1231 static char termbuf[TERMBUF_SIZE];
1232 static char sbuf[TERMSBUF_SIZE];
1233
1234 #if OS2
1235 /*
1236 * Make sure the termcap database is available.
1237 */
1238 constant char *cp = lgetenv("TERMCAP");
1239 if (isnullenv(cp))
1240 {
1241 char *termcap;
1242 if ((sp = homefile("termcap.dat")) != NULL)
1243 {
1244 termcap = (char *) ecalloc(strlen(sp)+9, sizeof(char));
1245 sprintf(termcap, "TERMCAP=%s", sp);
1246 free(sp);
1247 putenv(termcap);
1248 }
1249 }
1250 #endif
1251 /*
1252 * Find out what kind of terminal this is.
1253 */
1254 if ((term = lgetenv("TERM")) == NULL)
1255 term = DEFAULT_TERM;
1256 hardcopy = 0;
1257 /* {{ Should probably just pass NULL instead of termbuf. }} */
1258 if (tgetent(termbuf, term) != TGETENT_OK)
1259 hardcopy = 1;
1260 if (ltgetflag("hc"))
1261 hardcopy = 1;
1262
1263 /*
1264 * Get size of the screen.
1265 */
1266 scrsize();
1267 pos_init();
1268
1269 auto_wrap = ltgetflag("am");
1270 ignaw = ltgetflag("xn");
1271 above_mem = ltgetflag("da");
1272 below_mem = ltgetflag("db");
1273 clear_bg = ltgetflag("ut");
1274 no_alt_screen = ltgetflag("NR");
1275
1276 /*
1277 * Assumes termcap variable "sg" is the printing width of:
1278 * the standout sequence, the end standout sequence,
1279 * the underline sequence, the end underline sequence,
1280 * the boldface sequence, and the end boldface sequence.
1281 */
1282 if ((so_s_width = ltgetnum("sg")) < 0)
1283 so_s_width = 0;
1284 so_e_width = so_s_width;
1285
1286 bo_s_width = bo_e_width = so_s_width;
1287 ul_s_width = ul_e_width = so_s_width;
1288 bl_s_width = bl_e_width = so_s_width;
1289
1290 #if HILITE_SEARCH
1291 if (so_s_width > 0 || so_e_width > 0)
1292 /*
1293 * Disable highlighting by default on magic cookie terminals.
1294 * Turning on highlighting might change the displayed width
1295 * of a line, causing the display to get messed up.
1296 * The user can turn it back on with -g,
1297 * but she won't like the results.
1298 */
1299 hilite_search = 0;
1300 #endif
1301
1302 /*
1303 * Get various string-valued capabilities.
1304 */
1305 sp = sbuf;
1306
1307 #if HAVE_OSPEED
1308 sc_pad = ltgetstr("pc", &sp);
1309 if (sc_pad != NULL)
1310 PC = *sc_pad;
1311 #endif
1312
1313 sc_s_keypad = ltgetstr("ks", &sp);
1314 if (sc_s_keypad == NULL)
1315 sc_s_keypad = "";
1316 sc_e_keypad = ltgetstr("ke", &sp);
1317 if (sc_e_keypad == NULL)
1318 sc_e_keypad = "";
1319 kent = ltgetstr("@8", &sp);
1320
1321 sc_s_mousecap = ltgetstr("MOUSE_START", &sp);
1322 if (sc_s_mousecap == NULL)
1323 sc_s_mousecap = ESCS "[?1000h" ESCS "[?1002h" ESCS "[?1006h";
1324 sc_e_mousecap = ltgetstr("MOUSE_END", &sp);
1325 if (sc_e_mousecap == NULL)
1326 sc_e_mousecap = ESCS "[?1006l" ESCS "[?1002l" ESCS "[?1000l";
1327
1328 sc_s_bracketed_paste = ltgetstr("BRACKETED_PASTE_START", &sp);
1329 if (sc_s_bracketed_paste == NULL)
1330 sc_s_bracketed_paste = ESCS"[?2004h";
1331 sc_e_bracketed_paste = ltgetstr("BRACKETED_PASTE_END", &sp);
1332 if (sc_e_bracketed_paste == NULL)
1333 sc_e_bracketed_paste = ESCS"[?2004l";
1334
1335 sc_suspend = ltgetstr("SUSPEND", &sp);
1336 if (sc_suspend == NULL)
1337 sc_suspend = "";
1338 sc_resume = ltgetstr("RESUME", &sp);
1339 if (sc_resume == NULL)
1340 sc_resume = "";
1341
1342 sc_init = ltgetstr("ti", &sp);
1343 if (sc_init == NULL)
1344 sc_init = "";
1345
1346 sc_deinit= ltgetstr("te", &sp);
1347 if (sc_deinit == NULL)
1348 sc_deinit = "";
1349
1350 sc_eol_clear = ltgetstr("ce", &sp);
1351 if (sc_eol_clear == NULL || *sc_eol_clear == '\0')
1352 {
1353 missing_cap = TRUE;
1354 sc_eol_clear = "";
1355 }
1356
1357 sc_eos_clear = ltgetstr("cd", &sp);
1358 if (below_mem && (sc_eos_clear == NULL || *sc_eos_clear == '\0'))
1359 {
1360 missing_cap = TRUE;
1361 sc_eos_clear = "";
1362 }
1363
1364 sc_clear = ltgetstr("cl", &sp);
1365 if (sc_clear == NULL || *sc_clear == '\0')
1366 {
1367 missing_cap = TRUE;
1368 sc_clear = "\n\n";
1369 }
1370
1371 sc_move = ltgetstr("cm", &sp);
1372 if (sc_move == NULL || *sc_move == '\0')
1373 {
1374 /*
1375 * This is not an error here, because we don't
1376 * always need sc_move.
1377 * We need it only if we don't have home or lower-left.
1378 */
1379 sc_move = "";
1380 can_goto_line = 0;
1381 } else
1382 can_goto_line = 1;
1383
1384 tmodes("so", "se", &sc_s_in, &sc_s_out, "", "", &sp);
1385 tmodes("us", "ue", &sc_u_in, &sc_u_out, sc_s_in, sc_s_out, &sp);
1386 tmodes("md", "me", &sc_b_in, &sc_b_out, sc_s_in, sc_s_out, &sp);
1387 tmodes("mb", "me", &sc_bl_in, &sc_bl_out, sc_s_in, sc_s_out, &sp);
1388
1389 sc_visual_bell = ltgetstr("vb", &sp);
1390 if (sc_visual_bell == NULL)
1391 sc_visual_bell = "";
1392
1393 if (ltgetflag("bs"))
1394 sc_backspace = "\b";
1395 else
1396 {
1397 sc_backspace = ltgetstr("bc", &sp);
1398 if (sc_backspace == NULL || *sc_backspace == '\0')
1399 sc_backspace = "\b";
1400 }
1401
1402 /*
1403 * Choose between using "ho" and "cm" ("home" and "cursor move")
1404 * to move the cursor to the upper left corner of the screen.
1405 */
1406 t1 = ltgetstr("ho", &sp);
1407 if (t1 == NULL)
1408 t1 = "";
1409 if (*sc_move == '\0')
1410 t2 = "";
1411 else
1412 {
1413 strcpy(sp, tgoto(sc_move, 0, 0));
1414 t2 = sp;
1415 sp += strlen(sp) + 1;
1416 }
1417 sc_home = cheaper(t1, t2, "|\b^");
1418
1419 /*
1420 * Choose between using "ll" and "cm" ("lower left" and "cursor move")
1421 * to move the cursor to the lower left corner of the screen.
1422 */
1423 t1 = ltgetstr("ll", &sp);
1424 if (t1 == NULL || !full_screen)
1425 t1 = "";
1426 if (*sc_move == '\0')
1427 t2 = "";
1428 else
1429 {
1430 strcpy(sp, tgoto(sc_move, 0, sc_height-1));
1431 t2 = sp;
1432 sp += strlen(sp) + 1;
1433 }
1434 sc_lower_left = cheaper(t1, t2, "\r");
1435
1436 /*
1437 * Get carriage return string.
1438 */
1439 sc_return = ltgetstr("cr", &sp);
1440 if (sc_return == NULL)
1441 sc_return = "\r";
1442
1443 /*
1444 * Choose between using "al" or "sr" ("add line" or "scroll reverse")
1445 * to add a line at the top of the screen.
1446 */
1447 t1 = ltgetstr("al", &sp);
1448 if (t1 == NULL)
1449 t1 = "";
1450 t2 = ltgetstr("sr", &sp);
1451 if (t2 == NULL)
1452 t2 = "";
1453 if (*t1 == '\0' && *t2 == '\0')
1454 sc_addline = "";
1455 else if (above_mem)
1456 sc_addline = t1;
1457 else
1458 sc_addline = cheaper(t1, t2, "");
1459 if (*sc_addline == '\0')
1460 {
1461 /*
1462 * Force repaint on any backward movement.
1463 */
1464 no_back_scroll = 1;
1465 }
1466 }
1467 #endif /* MSDOS_COMPILER */
1468 {
1469 const char *env = lgetenv("LESS_SHELL_LINES");
1470 shell_lines = isnullenv(env) ? 1 : atoi(env);
1471 if (shell_lines >= sc_height)
1472 shell_lines = sc_height - 1;
1473 }
1474 }
1475
1476 #if !MSDOS_COMPILER
1477 /*
1478 * Return the cost of displaying a termcap string.
1479 * We use the trick of calling tputs, but as a char printing function
1480 * we give it inc_costcount, which just increments "costcount".
1481 * This tells us how many chars would be printed by using this string.
1482 * {{ Couldn't we just use strlen? }}
1483 */
1484 static int costcount;
1485
1486 /*ARGSUSED*/
inc_costcount(int c)1487 static int inc_costcount(int c)
1488 {
1489 costcount++;
1490 return (c);
1491 }
1492
cost(constant char * t)1493 static int cost(constant char *t)
1494 {
1495 costcount = 0;
1496 tputs(t, sc_height, inc_costcount);
1497 return (costcount);
1498 }
1499
1500 /*
1501 * Return the "best" of the two given termcap strings.
1502 * The best, if both exist, is the one with the lower
1503 * cost (see cost() function).
1504 */
cheaper(constant char * t1,constant char * t2,constant char * def)1505 static constant char * cheaper(constant char *t1, constant char *t2, constant char *def)
1506 {
1507 if (*t1 == '\0' && *t2 == '\0')
1508 {
1509 missing_cap = TRUE;
1510 return (def);
1511 }
1512 if (*t1 == '\0')
1513 return (t2);
1514 if (*t2 == '\0')
1515 return (t1);
1516 if (cost(t1) < cost(t2))
1517 return (t1);
1518 return (t2);
1519 }
1520
tmodes(constant char * incap,constant char * outcap,constant char ** instr,constant char ** outstr,constant char * def_instr,constant char * def_outstr,char ** spp)1521 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)
1522 {
1523 *instr = ltgetstr(incap, spp);
1524 if (*instr == NULL)
1525 {
1526 /* Use defaults. */
1527 *instr = def_instr;
1528 *outstr = def_outstr;
1529 return;
1530 }
1531
1532 *outstr = ltgetstr(outcap, spp);
1533 if (*outstr == NULL)
1534 /* No specific out capability; use "me". */
1535 *outstr = ltgetstr("me", spp);
1536 if (*outstr == NULL)
1537 /* Don't even have "me"; use a null string. */
1538 *outstr = "";
1539 }
1540
1541 #endif /* MSDOS_COMPILER */
1542
1543
1544 /*
1545 * Below are the functions which perform all the
1546 * terminal-specific screen manipulation.
1547 */
1548
1549
1550 #if MSDOS_COMPILER
1551
1552 #if MSDOS_COMPILER==WIN32C
_settextposition(int row,int col)1553 static void _settextposition(int row, int col)
1554 {
1555 COORD cpos;
1556 CONSOLE_SCREEN_BUFFER_INFO csbi;
1557
1558 GetConsoleScreenBufferInfo(con_out, &csbi);
1559 cpos.X = csbi.srWindow.Left + (col - 1);
1560 cpos.Y = csbi.srWindow.Top + (row - 1);
1561 SetConsoleCursorPosition(con_out, cpos);
1562 }
1563 #endif
1564
1565 /*
1566 * Initialize the screen to the correct color at startup.
1567 */
initcolor(void)1568 static void initcolor(void)
1569 {
1570 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1571 intensevideo();
1572 #endif
1573 SETCOLORS(nm_fg_color, nm_bg_color);
1574 #if 0
1575 /*
1576 * This clears the screen at startup. This is different from
1577 * the behavior of other versions of less. Disable it for now.
1578 */
1579 char *blanks;
1580 int row;
1581 int col;
1582
1583 /*
1584 * Create a complete, blank screen using "normal" colors.
1585 */
1586 SETCOLORS(nm_fg_color, nm_bg_color);
1587 blanks = (char *) ecalloc(width+1, sizeof(char));
1588 for (col = 0; col < sc_width; col++)
1589 blanks[col] = ' ';
1590 blanks[sc_width] = '\0';
1591 for (row = 0; row < sc_height; row++)
1592 _outtext(blanks);
1593 free(blanks);
1594 #endif
1595 }
1596 #endif
1597
1598 #if MSDOS_COMPILER==WIN32C
1599
1600 /*
1601 * Enable virtual terminal processing, if available.
1602 */
win32_init_vt_term(void)1603 static void win32_init_vt_term(void)
1604 {
1605 if (vt_enabled == 0 || (vt_enabled == 1 && con_out == con_out_ours))
1606 return; // already initialized
1607
1608 /* don't care about the initial mode, and win VT hard-enables am+xn */
1609 vt_enabled = SetConsoleMode(con_out, ENABLE_PROCESSED_OUTPUT |
1610 ENABLE_VIRTUAL_TERMINAL_PROCESSING |
1611 ENABLE_WRAP_AT_EOL_OUTPUT);
1612 if (vt_enabled)
1613 {
1614 auto_wrap = 1;
1615 ignaw = 1;
1616 }
1617 }
1618
win32_deinit_vt_term(void)1619 static void win32_deinit_vt_term(void)
1620 {
1621 if (vt_enabled == 1 && con_out == con_out_save)
1622 SetConsoleMode(con_out, init_console_output_mode);
1623 }
1624
1625 /*
1626 * Termcap-like init with a private win32 console.
1627 */
win32_init_term(void)1628 static void win32_init_term(void)
1629 {
1630 CONSOLE_SCREEN_BUFFER_INFO scr;
1631 COORD size;
1632
1633 if (con_out_save == INVALID_HANDLE_VALUE)
1634 return;
1635
1636 GetConsoleScreenBufferInfo(con_out_save, &scr);
1637
1638 if (con_out_ours == INVALID_HANDLE_VALUE)
1639 {
1640 /*
1641 * Create our own screen buffer, so that we
1642 * may restore the original when done.
1643 */
1644 con_out_ours = CreateConsoleScreenBuffer(
1645 GENERIC_WRITE | GENERIC_READ,
1646 FILE_SHARE_WRITE | FILE_SHARE_READ,
1647 (LPSECURITY_ATTRIBUTES) NULL,
1648 CONSOLE_TEXTMODE_BUFFER,
1649 (LPVOID) NULL);
1650
1651 // we don't care about the initial state. we need processed
1652 // output without anything else (no wrap at EOL, no VT,
1653 // no disabled auto-return).
1654 if (SetConsoleMode(con_out_ours, ENABLE_PROCESSED_OUTPUT))
1655 auto_wrap = 0;
1656 }
1657
1658 size.X = scr.srWindow.Right - scr.srWindow.Left + 1;
1659 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1;
1660 SetConsoleScreenBufferSize(con_out_ours, size);
1661 SetConsoleActiveScreenBuffer(con_out_ours);
1662 con_out = con_out_ours;
1663 }
1664
1665 /*
1666 * Restore the startup console.
1667 */
win32_deinit_term(void)1668 static void win32_deinit_term(void)
1669 {
1670 if (con_out_save == INVALID_HANDLE_VALUE)
1671 return;
1672 if (quitting)
1673 (void) CloseHandle(con_out_ours);
1674 SetConsoleActiveScreenBuffer(con_out_save);
1675 con_out = con_out_save;
1676 }
1677
1678 #endif
1679
1680 #if !MSDOS_COMPILER
do_tputs(constant char * str,int affcnt,int (* f_putc)(int))1681 static void do_tputs(constant char *str, int affcnt, int (*f_putc)(int))
1682 {
1683 #if LESSTEST
1684 if (is_lesstest() && f_putc == putchr)
1685 putstr(str);
1686 else
1687 #endif /*LESSTEST*/
1688 tputs(str, affcnt, f_putc);
1689 }
1690
1691 /*
1692 * Like tputs but we handle $<...> delay strings here because
1693 * some implementations of tputs don't perform delays correctly.
1694 */
ltputs(constant char * str,int affcnt,int (* f_putc)(int))1695 static void ltputs(constant char *str, int affcnt, int (*f_putc)(int))
1696 {
1697 while (str != NULL && *str != '\0')
1698 {
1699 #if HAVE_STRSTR
1700 constant char *obrac = strstr(str, "$<");
1701 if (obrac != NULL)
1702 {
1703 char str2[64];
1704 size_t slen = ptr_diff(obrac, str);
1705 if (slen < sizeof(str2))
1706 {
1707 int delay;
1708 /* Output first part of string (before "$<"). */
1709 memcpy(str2, str, slen);
1710 str2[slen] = '\0';
1711 do_tputs(str2, affcnt, f_putc);
1712 str += slen + 2;
1713 /* Perform the delay. */
1714 delay = lstrtoic(str, &str, 10);
1715 if (*str == '*')
1716 if (ckd_mul(&delay, delay, affcnt))
1717 delay = INT_MAX;
1718 flush();
1719 sleep_ms(delay);
1720 /* Skip past closing ">" at end of delay string. */
1721 str = strstr(str, ">");
1722 if (str != NULL)
1723 str++;
1724 continue;
1725 }
1726 }
1727 #endif
1728 /* Pass the rest of the string to tputs and we're done. */
1729 do_tputs(str, affcnt, f_putc);
1730 break;
1731 }
1732 }
1733 #endif /* MSDOS_COMPILER */
1734
1735 /*
1736 * Configure the terminal so mouse clicks and wheel moves
1737 * produce input to less.
1738 */
init_mouse(void)1739 public void init_mouse(void)
1740 {
1741 #if !MSDOS_COMPILER
1742 ltputs(sc_s_mousecap, sc_height, putchr);
1743 #else
1744 #if MSDOS_COMPILER==WIN32C
1745 curr_console_input_mode = mouse_console_input_mode;
1746 SetConsoleMode(tty, curr_console_input_mode);
1747 #endif
1748 #endif
1749 }
1750
1751 /*
1752 * Configure the terminal so mouse clicks and wheel moves
1753 * are handled by the system (so text can be selected, etc).
1754 */
deinit_mouse(void)1755 public void deinit_mouse(void)
1756 {
1757 #if !MSDOS_COMPILER
1758 ltputs(sc_e_mousecap, sc_height, putchr);
1759 #else
1760 #if MSDOS_COMPILER==WIN32C
1761 curr_console_input_mode = base_console_input_mode;
1762 SetConsoleMode(tty, curr_console_input_mode);
1763 #endif
1764 #endif
1765 }
1766
1767 /*
1768 * Suspend screen updates.
1769 */
suspend_screen(void)1770 public void suspend_screen(void)
1771 {
1772 #if !MSDOS_COMPILER
1773 ltputs(sc_suspend, 1, putchr);
1774 #endif
1775 }
1776
1777 /*
1778 * Resume screen updates.
1779 */
resume_screen(void)1780 public void resume_screen(void)
1781 {
1782 #if !MSDOS_COMPILER
1783 ltputs(sc_resume, 1, putchr);
1784 #endif
1785 }
1786
1787 /*
1788 * Initialize terminal
1789 */
init(void)1790 public void init(void)
1791 {
1792 clear_bot_if_needed();
1793 #if !MSDOS_COMPILER
1794 if (!(quit_if_one_screen && one_screen))
1795 {
1796 if (!no_init)
1797 {
1798 ltputs(sc_init, sc_height, putchr);
1799 /*
1800 * Some terminals leave the cursor unmoved when switching
1801 * to the alt screen. To avoid having the text appear at
1802 * a seemingly random line on the alt screen, move to
1803 * lower left if we are using an alt screen.
1804 */
1805 if (*sc_init != '\0' && *sc_deinit != '\0' && !no_alt_screen)
1806 lower_left();
1807 term_init_done = 1;
1808 }
1809 if (!no_keypad)
1810 ltputs(sc_s_keypad, sc_height, putchr);
1811 if (mousecap)
1812 init_mouse();
1813 if (no_paste)
1814 init_bracketed_paste();
1815 }
1816 init_done = 1;
1817 if (top_scroll)
1818 {
1819 int i;
1820
1821 /*
1822 * This is nice to terminals with no alternate screen,
1823 * but with saved scrolled-off-the-top lines. This way,
1824 * no previous line is lost, but we start with a whole
1825 * screen to ourself.
1826 */
1827 for (i = 1; i < sc_height; i++)
1828 putchr('\n');
1829 } else
1830 line_left();
1831 #else
1832 #if MSDOS_COMPILER==WIN32C
1833 if (!(quit_if_one_screen && one_screen))
1834 {
1835 if (!no_init)
1836 {
1837 win32_init_term();
1838 term_init_done = 1;
1839 }
1840 if (mousecap)
1841 init_mouse();
1842
1843 }
1844 win32_init_vt_term();
1845 #endif
1846 init_done = 1;
1847 initcolor();
1848 flush();
1849 #endif
1850 }
1851
1852 /*
1853 * Deinitialize terminal
1854 */
deinit(void)1855 public void deinit(void)
1856 {
1857 if (!init_done)
1858 return;
1859 #if !MSDOS_COMPILER
1860 if (!(quit_if_one_screen && one_screen))
1861 {
1862 if (mousecap)
1863 deinit_mouse();
1864 if (no_paste)
1865 deinit_bracketed_paste();
1866 if (!no_keypad)
1867 ltputs(sc_e_keypad, sc_height, putchr);
1868 if (!no_init)
1869 ltputs(sc_deinit, sc_height, putchr);
1870 }
1871 #else
1872 /* Restore system colors. */
1873 SETCOLORS(sy_fg_color, sy_bg_color);
1874 #if MSDOS_COMPILER==WIN32C
1875 win32_deinit_vt_term();
1876 if (!(quit_if_one_screen && one_screen))
1877 {
1878 if (mousecap)
1879 deinit_mouse();
1880 if (!no_init)
1881 win32_deinit_term();
1882 }
1883 #else
1884 /* Need clreol to make SETCOLORS take effect. */
1885 clreol();
1886 #endif
1887 #endif
1888 init_done = 0;
1889 }
1890
1891 /*
1892 * Are we interactive (ie. writing to an initialized tty)?
1893 */
interactive(void)1894 public int interactive(void)
1895 {
1896 return (is_tty && init_done);
1897 }
1898
assert_interactive(void)1899 static void assert_interactive(void)
1900 {
1901 if (interactive()) return;
1902 /* abort(); */
1903 }
1904
1905 /*
1906 * Home cursor (move to upper left corner of screen).
1907 */
home(void)1908 public void home(void)
1909 {
1910 assert_interactive();
1911 #if !MSDOS_COMPILER
1912 ltputs(sc_home, 1, putchr);
1913 #else
1914 flush();
1915 _settextposition(1,1);
1916 #endif
1917 }
1918
1919 #if LESSTEST
dump_screen(void)1920 public void dump_screen(void)
1921 {
1922 char dump_cmd[32];
1923 SNPRINTF1(dump_cmd, sizeof(dump_cmd), ESCS"0;0;%dR", sc_width * sc_height);
1924 ltputs(dump_cmd, sc_height, putchr);
1925 flush();
1926 }
1927 #endif /*LESSTEST*/
1928
1929 /*
1930 * Add a blank line (called with cursor at home).
1931 * Should scroll the display down.
1932 */
add_line(void)1933 public void add_line(void)
1934 {
1935 assert_interactive();
1936 #if !MSDOS_COMPILER
1937 ltputs(sc_addline, sc_height, putchr);
1938 #else
1939 flush();
1940 #if MSDOS_COMPILER==MSOFTC
1941 _scrolltextwindow(_GSCROLLDOWN);
1942 _settextposition(1,1);
1943 #else
1944 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1945 movetext(1,1, sc_width,sc_height-1, 1,2);
1946 gotoxy(1,1);
1947 clreol();
1948 #else
1949 #if MSDOS_COMPILER==WIN32C
1950 {
1951 CHAR_INFO fillchar;
1952 SMALL_RECT rcSrc, rcClip;
1953 COORD new_org;
1954 CONSOLE_SCREEN_BUFFER_INFO csbi;
1955
1956 GetConsoleScreenBufferInfo(con_out,&csbi);
1957
1958 /* The clip rectangle is the entire visible screen. */
1959 rcClip.Left = csbi.srWindow.Left;
1960 rcClip.Top = csbi.srWindow.Top;
1961 rcClip.Right = csbi.srWindow.Right;
1962 rcClip.Bottom = csbi.srWindow.Bottom;
1963
1964 /* The source rectangle is the visible screen minus the last line. */
1965 rcSrc = rcClip;
1966 rcSrc.Bottom--;
1967
1968 /* Move the top left corner of the source window down one row. */
1969 new_org.X = rcSrc.Left;
1970 new_org.Y = rcSrc.Top + 1;
1971
1972 /* Fill the right character and attributes. */
1973 fillchar.Char.AsciiChar = ' ';
1974 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
1975 fillchar.Attributes = curr_attr;
1976 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar);
1977 _settextposition(1,1);
1978 }
1979 #endif
1980 #endif
1981 #endif
1982 #endif
1983 }
1984
1985 #if 0
1986 /*
1987 * Remove the n topmost lines and scroll everything below it in the
1988 * window upward. This is needed to stop leaking the topmost line
1989 * into the scrollback buffer when we go down-one-line (in WIN32).
1990 */
1991 public void remove_top(int n)
1992 {
1993 #if MSDOS_COMPILER==WIN32C
1994 SMALL_RECT rcSrc, rcClip;
1995 CHAR_INFO fillchar;
1996 COORD new_org;
1997 CONSOLE_SCREEN_BUFFER_INFO csbi; /* to get buffer info */
1998
1999 if (n >= sc_height - 1)
2000 {
2001 clear();
2002 home();
2003 return;
2004 }
2005
2006 flush();
2007
2008 GetConsoleScreenBufferInfo(con_out, &csbi);
2009
2010 /* Get the extent of all-visible-rows-but-the-last. */
2011 rcSrc.Left = csbi.srWindow.Left;
2012 rcSrc.Top = csbi.srWindow.Top + n;
2013 rcSrc.Right = csbi.srWindow.Right;
2014 rcSrc.Bottom = csbi.srWindow.Bottom;
2015
2016 /* Get the clip rectangle. */
2017 rcClip.Left = rcSrc.Left;
2018 rcClip.Top = csbi.srWindow.Top;
2019 rcClip.Right = rcSrc.Right;
2020 rcClip.Bottom = rcSrc.Bottom ;
2021
2022 /* Move the source window up n rows. */
2023 new_org.X = rcSrc.Left;
2024 new_org.Y = rcSrc.Top - n;
2025
2026 /* Fill the right character and attributes. */
2027 fillchar.Char.AsciiChar = ' ';
2028 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
2029 fillchar.Attributes = curr_attr;
2030
2031 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar);
2032
2033 /* Position cursor on first blank line. */
2034 goto_line(sc_height - n - 1);
2035 #endif
2036 }
2037 #endif
2038
2039 #if MSDOS_COMPILER==WIN32C
2040 /*
2041 * Clear the screen.
2042 */
win32_clear(void)2043 static void win32_clear(void)
2044 {
2045 /*
2046 * This will clear only the currently visible rows of the NT
2047 * console buffer, which means none of the precious scrollback
2048 * rows are touched making for faster scrolling. Note that, if
2049 * the window has fewer columns than the console buffer (i.e.
2050 * there is a horizontal scrollbar as well), the entire width
2051 * of the visible rows will be cleared.
2052 */
2053 COORD topleft;
2054 DWORD nchars;
2055 DWORD winsz;
2056 CONSOLE_SCREEN_BUFFER_INFO csbi;
2057
2058 /* get the number of cells in the current buffer */
2059 GetConsoleScreenBufferInfo(con_out, &csbi);
2060 winsz = csbi.dwSize.X * (csbi.srWindow.Bottom - csbi.srWindow.Top + 1);
2061 topleft.X = 0;
2062 topleft.Y = csbi.srWindow.Top;
2063
2064 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
2065 FillConsoleOutputCharacter(con_out, ' ', winsz, topleft, &nchars);
2066 FillConsoleOutputAttribute(con_out, curr_attr, winsz, topleft, &nchars);
2067 }
2068
2069 /*
2070 * Remove the n topmost lines and scroll everything below it in the
2071 * window upward.
2072 */
win32_scroll_up(int n)2073 public void win32_scroll_up(int n)
2074 {
2075 SMALL_RECT rcSrc, rcClip;
2076 CHAR_INFO fillchar;
2077 COORD topleft;
2078 COORD new_org;
2079 DWORD nchars;
2080 DWORD size;
2081 CONSOLE_SCREEN_BUFFER_INFO csbi;
2082
2083 if (n <= 0)
2084 return;
2085
2086 if (n >= sc_height - 1)
2087 {
2088 win32_clear();
2089 _settextposition(1,1);
2090 return;
2091 }
2092
2093 /* Get the extent of what will remain visible after scrolling. */
2094 GetConsoleScreenBufferInfo(con_out, &csbi);
2095 rcSrc.Left = csbi.srWindow.Left;
2096 rcSrc.Top = csbi.srWindow.Top + n;
2097 rcSrc.Right = csbi.srWindow.Right;
2098 rcSrc.Bottom = csbi.srWindow.Bottom;
2099
2100 /* Get the clip rectangle. */
2101 rcClip.Left = rcSrc.Left;
2102 rcClip.Top = csbi.srWindow.Top;
2103 rcClip.Right = rcSrc.Right;
2104 rcClip.Bottom = rcSrc.Bottom ;
2105
2106 /* Move the source text to the top of the screen. */
2107 new_org.X = rcSrc.Left;
2108 new_org.Y = rcClip.Top;
2109
2110 /* Fill the right character and attributes. */
2111 fillchar.Char.AsciiChar = ' ';
2112 fillchar.Attributes = MAKEATTR(nm_fg_color, nm_bg_color);
2113
2114 /* Scroll the window. */
2115 SetConsoleTextAttribute(con_out, fillchar.Attributes);
2116 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar);
2117
2118 /* Clear remaining lines at bottom. */
2119 topleft.X = csbi.dwCursorPosition.X;
2120 topleft.Y = rcSrc.Bottom - n;
2121 size = (n * csbi.dwSize.X) + (rcSrc.Right - topleft.X);
2122 FillConsoleOutputCharacter(con_out, ' ', size, topleft,
2123 &nchars);
2124 FillConsoleOutputAttribute(con_out, fillchar.Attributes, size, topleft,
2125 &nchars);
2126 SetConsoleTextAttribute(con_out, curr_attr);
2127
2128 /* Move cursor n lines up from where it was. */
2129 csbi.dwCursorPosition.Y -= n;
2130 SetConsoleCursorPosition(con_out, csbi.dwCursorPosition);
2131 }
2132 #endif
2133
2134 /*
2135 * Move cursor to lower left corner of screen.
2136 */
lower_left(void)2137 public void lower_left(void)
2138 {
2139 assert_interactive();
2140 #if !MSDOS_COMPILER
2141 ltputs(sc_lower_left, 1, putchr);
2142 #else
2143 flush();
2144 _settextposition(sc_height, 1);
2145 #endif
2146 }
2147
2148 /*
2149 * Move cursor to left position of current line.
2150 */
line_left(void)2151 public void line_left(void)
2152 {
2153 assert_interactive();
2154 #if !MSDOS_COMPILER
2155 ltputs(sc_return, 1, putchr);
2156 #else
2157 {
2158 int row;
2159 flush();
2160 #if MSDOS_COMPILER==WIN32C
2161 {
2162 CONSOLE_SCREEN_BUFFER_INFO scr;
2163 GetConsoleScreenBufferInfo(con_out, &scr);
2164 row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1;
2165 }
2166 #else
2167 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
2168 row = wherey();
2169 #else
2170 {
2171 struct rccoord tpos = _gettextposition();
2172 row = tpos.row;
2173 }
2174 #endif
2175 #endif
2176 _settextposition(row, 1);
2177 }
2178 #endif
2179 }
2180
2181 /*
2182 * Check if the console size has changed and reset internals
2183 * (in lieu of SIGWINCH for WIN32).
2184 */
check_winch(void)2185 public void check_winch(void)
2186 {
2187 #if MSDOS_COMPILER==WIN32C
2188 CONSOLE_SCREEN_BUFFER_INFO scr;
2189 COORD size;
2190
2191 if (con_out == INVALID_HANDLE_VALUE)
2192 return;
2193
2194 flush();
2195 GetConsoleScreenBufferInfo(con_out, &scr);
2196 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1;
2197 size.X = scr.srWindow.Right - scr.srWindow.Left + 1;
2198 if (size.Y != sc_height || size.X != sc_width)
2199 {
2200 sc_height = size.Y;
2201 sc_width = size.X;
2202 if (!no_init && con_out_ours == con_out)
2203 SetConsoleScreenBufferSize(con_out, size);
2204 pos_init();
2205 wscroll = (sc_height + 1) / 2;
2206 screen_trashed();
2207 }
2208 #endif
2209 }
2210
2211 /*
2212 * Goto a specific line on the screen.
2213 */
goto_line(int sindex)2214 public void goto_line(int sindex)
2215 {
2216 assert_interactive();
2217 #if !MSDOS_COMPILER
2218 ltputs(tgoto(sc_move, 0, sindex), 1, putchr);
2219 #else
2220 flush();
2221 _settextposition(sindex+1, 1);
2222 #endif
2223 }
2224
2225 #if MSDOS_COMPILER==MSOFTC || MSDOS_COMPILER==BORLANDC
2226 /*
2227 * Create an alternate screen which is all white.
2228 * This screen is used to create a "flash" effect, by displaying it
2229 * briefly and then switching back to the normal screen.
2230 * {{ Yuck! There must be a better way to get a visual bell. }}
2231 */
create_flash(void)2232 static void create_flash(void)
2233 {
2234 #if MSDOS_COMPILER==MSOFTC
2235 struct videoconfig w;
2236 char *blanks;
2237 int row, col;
2238
2239 _getvideoconfig(&w);
2240 videopages = w.numvideopages;
2241 if (videopages < 2)
2242 {
2243 at_enter(AT_STANDOUT);
2244 at_exit();
2245 } else
2246 {
2247 _setactivepage(1);
2248 at_enter(AT_STANDOUT);
2249 blanks = (char *) ecalloc(w.numtextcols, sizeof(char));
2250 for (col = 0; col < w.numtextcols; col++)
2251 blanks[col] = ' ';
2252 for (row = w.numtextrows; row > 0; row--)
2253 _outmem(blanks, w.numtextcols);
2254 _setactivepage(0);
2255 _setvisualpage(0);
2256 free(blanks);
2257 at_exit();
2258 }
2259 #else
2260 #if MSDOS_COMPILER==BORLANDC
2261 int n;
2262
2263 whitescreen = (unsigned short *)
2264 malloc(sc_width * sc_height * sizeof(short));
2265 if (whitescreen == NULL)
2266 return;
2267 for (n = 0; n < sc_width * sc_height; n++)
2268 whitescreen[n] = 0x7020;
2269 #endif
2270 #endif
2271 flash_created = 1;
2272 }
2273 #endif /* MSDOS_COMPILER */
2274
2275 /*
2276 * Output the "visual bell", if there is one.
2277 */
vbell(void)2278 public void vbell(void)
2279 {
2280 if (no_vbell)
2281 return;
2282 #if !MSDOS_COMPILER
2283 if (*sc_visual_bell == '\0')
2284 return;
2285 ltputs(sc_visual_bell, sc_height, putchr);
2286 #else
2287 #if MSDOS_COMPILER==DJGPPC
2288 ScreenVisualBell();
2289 #else
2290 #if MSDOS_COMPILER==MSOFTC
2291 /*
2292 * Create a flash screen on the second video page.
2293 * Switch to that page, then switch back.
2294 */
2295 if (!flash_created)
2296 create_flash();
2297 if (videopages < 2)
2298 return;
2299 _setvisualpage(1);
2300 delay(100);
2301 _setvisualpage(0);
2302 #else
2303 #if MSDOS_COMPILER==BORLANDC
2304 unsigned short *currscreen;
2305
2306 /*
2307 * Get a copy of the current screen.
2308 * Display the flash screen.
2309 * Then restore the old screen.
2310 */
2311 if (!flash_created)
2312 create_flash();
2313 if (whitescreen == NULL)
2314 return;
2315 currscreen = (unsigned short *)
2316 malloc(sc_width * sc_height * sizeof(short));
2317 if (currscreen == NULL) return;
2318 gettext(1, 1, sc_width, sc_height, currscreen);
2319 puttext(1, 1, sc_width, sc_height, whitescreen);
2320 delay(100);
2321 puttext(1, 1, sc_width, sc_height, currscreen);
2322 free(currscreen);
2323 #else
2324 #if MSDOS_COMPILER==WIN32C
2325 /* paint screen with an inverse color */
2326 clear();
2327
2328 /* leave it displayed for 100 msec. */
2329 Sleep(100);
2330
2331 /* restore with a redraw */
2332 repaint();
2333 #endif
2334 #endif
2335 #endif
2336 #endif
2337 #endif
2338 }
2339
2340 /*
2341 * Make a noise.
2342 */
beep(void)2343 static void beep(void)
2344 {
2345 #if !MSDOS_COMPILER
2346 putchr(CONTROL('G'));
2347 #else
2348 #if MSDOS_COMPILER==WIN32C
2349 MessageBeep(0);
2350 #else
2351 write(1, "\7", 1);
2352 #endif
2353 #endif
2354 }
2355
2356 /*
2357 * Ring the terminal bell.
2358 */
bell(void)2359 public void bell(void)
2360 {
2361 if (quiet == VERY_QUIET)
2362 vbell();
2363 else
2364 beep();
2365 }
2366
2367 /*
2368 * Clear the screen.
2369 */
clear(void)2370 public void clear(void)
2371 {
2372 assert_interactive();
2373 suspend_screen();
2374 #if !MSDOS_COMPILER
2375 ltputs(sc_clear, sc_height, putchr);
2376 #else
2377 flush();
2378 #if MSDOS_COMPILER==WIN32C
2379 win32_clear();
2380 #else
2381 _clearscreen(_GCLEARSCREEN);
2382 #endif
2383 #endif
2384 }
2385
2386 /*
2387 * Clear from the cursor to the end of the cursor's line.
2388 * {{ This must not move the cursor. }}
2389 */
clear_eol(void)2390 public void clear_eol(void)
2391 {
2392 /* assert_interactive();*/
2393 #if !MSDOS_COMPILER
2394 ltputs(sc_eol_clear, 1, putchr);
2395 #else
2396 #if MSDOS_COMPILER==MSOFTC
2397 short top, left;
2398 short bot, right;
2399 struct rccoord tpos;
2400
2401 flush();
2402 /*
2403 * Save current state.
2404 */
2405 tpos = _gettextposition();
2406 _gettextwindow(&top, &left, &bot, &right);
2407 /*
2408 * Set a temporary window to the current line,
2409 * from the cursor's position to the right edge of the screen.
2410 * Then clear that window.
2411 */
2412 _settextwindow(tpos.row, tpos.col, tpos.row, sc_width);
2413 _clearscreen(_GWINDOW);
2414 /*
2415 * Restore state.
2416 */
2417 _settextwindow(top, left, bot, right);
2418 _settextposition(tpos.row, tpos.col);
2419 #else
2420 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
2421 flush();
2422 clreol();
2423 #else
2424 #if MSDOS_COMPILER==WIN32C
2425 DWORD nchars;
2426 COORD cpos;
2427 CONSOLE_SCREEN_BUFFER_INFO scr;
2428
2429 flush();
2430 memset(&scr, 0, sizeof(scr));
2431 GetConsoleScreenBufferInfo(con_out, &scr);
2432 cpos.X = scr.dwCursorPosition.X;
2433 cpos.Y = scr.dwCursorPosition.Y;
2434 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
2435 FillConsoleOutputAttribute(con_out, curr_attr,
2436 scr.dwSize.X - cpos.X, cpos, &nchars);
2437 FillConsoleOutputCharacter(con_out, ' ',
2438 scr.dwSize.X - cpos.X, cpos, &nchars);
2439 #endif
2440 #endif
2441 #endif
2442 #endif
2443 }
2444
2445 /*
2446 * Clear the current line.
2447 * Clear the screen if there's off-screen memory below the display.
2448 */
clear_eol_bot(void)2449 static void clear_eol_bot(void)
2450 {
2451 assert_interactive();
2452 #if MSDOS_COMPILER
2453 clear_eol();
2454 #else
2455 if (below_mem)
2456 ltputs(sc_eos_clear, 1, putchr);
2457 else
2458 ltputs(sc_eol_clear, 1, putchr);
2459 #endif
2460 }
2461
2462 /*
2463 * Clear the bottom line of the display.
2464 * Leave the cursor at the beginning of the bottom line.
2465 */
clear_bot(void)2466 public void clear_bot(void)
2467 {
2468 /*
2469 * If we're in a non-normal attribute mode, temporarily exit
2470 * the mode while we do the clear. Some terminals fill the
2471 * cleared area with the current attribute.
2472 */
2473 if (oldbot)
2474 lower_left();
2475 else
2476 line_left();
2477
2478 if (attrmode == AT_NORMAL)
2479 clear_eol_bot();
2480 else
2481 {
2482 int saved_attrmode = attrmode;
2483
2484 at_exit();
2485 clear_eol_bot();
2486 at_enter(saved_attrmode);
2487 }
2488 }
2489
2490 /*
2491 * Enable or disable bracketed paste mode.
2492 * When enabled, the terminal sends an "open bracket" sequence
2493 * before pasted content and "close bracket" after it.
2494 */
init_bracketed_paste(void)2495 public void init_bracketed_paste(void)
2496 {
2497 #if !MSDOS_COMPILER
2498 ltputs(sc_s_bracketed_paste, 1, putchr);
2499 #endif
2500 }
2501
deinit_bracketed_paste(void)2502 public void deinit_bracketed_paste(void)
2503 {
2504 #if !MSDOS_COMPILER
2505 ltputs(sc_e_bracketed_paste, 1, putchr);
2506 #endif
2507 }
2508
2509 /*
2510 * Color string may be "x[y]" where x and y are 4-bit color chars,
2511 * or "N[.M]" where N and M are decimal integers>
2512 * Any of x,y,N,M may also be "-" to mean "unchanged".
2513 */
2514
2515 /*
2516 * Parse a 4-bit color char.
2517 */
parse_color4(char ch)2518 static int parse_color4(char ch)
2519 {
2520 switch (ch)
2521 {
2522 case 'k': return 0;
2523 case 'r': return CV_RED;
2524 case 'g': return CV_GREEN;
2525 case 'y': return CV_RED|CV_GREEN;
2526 case 'b': return CV_BLUE;
2527 case 'm': return CV_RED|CV_BLUE;
2528 case 'c': return CV_GREEN|CV_BLUE;
2529 case 'w': return CV_RED|CV_GREEN|CV_BLUE;
2530 case 'K': return 0|CV_BRIGHT;
2531 case 'R': return CV_RED|CV_BRIGHT;
2532 case 'G': return CV_GREEN|CV_BRIGHT;
2533 case 'Y': return CV_RED|CV_GREEN|CV_BRIGHT;
2534 case 'B': return CV_BLUE|CV_BRIGHT;
2535 case 'M': return CV_RED|CV_BLUE|CV_BRIGHT;
2536 case 'C': return CV_GREEN|CV_BLUE|CV_BRIGHT;
2537 case 'W': return CV_RED|CV_GREEN|CV_BLUE|CV_BRIGHT;
2538 case '-': return CV_NOCHANGE;
2539 default: return CV_ERROR;
2540 }
2541 }
2542
2543 /*
2544 * Parse a color as a decimal integer.
2545 */
parse_color6(constant char ** ps)2546 static int parse_color6(constant char **ps)
2547 {
2548 if (**ps == '-')
2549 {
2550 (*ps)++;
2551 return CV_NOCHANGE;
2552 } else
2553 {
2554 constant char *os = *ps;
2555 int color = lstrtoic(os, ps, 10);
2556 if (color < 0 || *ps == os)
2557 return CV_ERROR;
2558 return color;
2559 }
2560 }
2561
2562 /*
2563 * Parse a color pair and return the foreground/background/attribute values.
2564 * Return type of color specifier:
2565 * CV_4BIT: fg/bg values are OR of CV_{RGB} bits.
2566 * CV_6BIT: fg/bg values are integers entered by user.
2567 */
parse_color(constant char * str,mutable int * p_fg,mutable int * p_bg,mutable CHAR_ATTR * p_cattr)2568 public COLOR_TYPE parse_color(constant char *str, mutable int *p_fg, mutable int *p_bg, mutable CHAR_ATTR *p_cattr)
2569 {
2570 int fg;
2571 int bg = CV_ERROR;
2572 CHAR_ATTR cattr = CATTR_NULL;
2573 COLOR_TYPE type = CT_NULL;
2574
2575 if (str == NULL || *str == '\0')
2576 return CT_NULL;
2577 if (*str == '+')
2578 str++; /* ignore leading + */
2579
2580 fg = parse_color4(*str);
2581 if (fg != CV_ERROR)
2582 {
2583 if (str[1] == '\0' || strchr("*~_&dsul", str[1]) != NULL)
2584 {
2585 bg = CV_NOCHANGE;
2586 str++; /* skip the fg char */
2587 } else
2588 {
2589 bg = parse_color4(str[1]);
2590 if (bg != CV_ERROR)
2591 str += 2; /* skip both fg and bg chars */
2592 }
2593 }
2594 if (fg != CV_ERROR && bg != CV_ERROR)
2595 type = CT_4BIT;
2596 else
2597 {
2598 fg = (*str == '.') ? CV_NOCHANGE : parse_color6(&str);
2599 if (fg != CV_ERROR)
2600 {
2601 if (*str != '.')
2602 bg = CV_NOCHANGE;
2603 else
2604 {
2605 str++; /* skip the dot */
2606 bg = parse_color6(&str);
2607 }
2608 }
2609 if (fg != CV_ERROR && bg != CV_ERROR)
2610 type = CT_6BIT;
2611 }
2612 if (type != CT_NULL)
2613 {
2614 for (;; str++)
2615 {
2616 if (*str == '*' || *str == 'd')
2617 cattr |= CATTR_BOLD;
2618 else if (*str == '~' || *str == 's')
2619 cattr |= CATTR_STANDOUT;
2620 else if (*str == '_' || *str == 'u')
2621 cattr |= CATTR_UNDERLINE;
2622 else if (*str == '&' || *str == 'l') /* can't use 'k' because of conflict with "black" */
2623 cattr |= CATTR_BLINK;
2624 else
2625 break;
2626 }
2627 if (p_fg != NULL) *p_fg = fg;
2628 if (p_bg != NULL) *p_bg = bg;
2629 if (p_cattr != NULL) *p_cattr = cattr;
2630 }
2631 return type;
2632 }
2633
2634 #if !MSDOS_COMPILER
2635
sgr_color(int color)2636 static int sgr_color(int color)
2637 {
2638 switch (color)
2639 {
2640 case 0: return 30;
2641 case CV_RED: return 31;
2642 case CV_GREEN: return 32;
2643 case CV_RED|CV_GREEN: return 33;
2644 case CV_BLUE: return 34;
2645 case CV_RED|CV_BLUE: return 35;
2646 case CV_GREEN|CV_BLUE: return 36;
2647 case CV_RED|CV_GREEN|CV_BLUE: return 37;
2648
2649 case CV_BRIGHT: return 90;
2650 case CV_RED|CV_BRIGHT: return 91;
2651 case CV_GREEN|CV_BRIGHT: return 92;
2652 case CV_RED|CV_GREEN|CV_BRIGHT: return 93;
2653 case CV_BLUE|CV_BRIGHT: return 94;
2654 case CV_RED|CV_BLUE|CV_BRIGHT: return 95;
2655 case CV_GREEN|CV_BLUE|CV_BRIGHT: return 96;
2656 case CV_RED|CV_GREEN|CV_BLUE|CV_BRIGHT: return 97;
2657
2658 default: return color;
2659 }
2660 }
2661
tput_fmt(constant char * fmt,int color,int (* f_putc)(int))2662 static void tput_fmt(constant char *fmt, int color, int (*f_putc)(int))
2663 {
2664 char buf[INT_STRLEN_BOUND(int)+16];
2665 if (color == attrcolor)
2666 return;
2667 SNPRINTF1(buf, sizeof(buf), fmt, color);
2668 ltputs(buf, 1, f_putc);
2669 attrcolor = color;
2670 }
2671
tput_char_cattr(CHAR_ATTR cattr,int (* f_putc)(int))2672 static void tput_char_cattr(CHAR_ATTR cattr, int (*f_putc)(int))
2673 {
2674 if (cattr & CATTR_UNDERLINE)
2675 ltputs(sc_u_in, 1, f_putc);
2676 if (cattr & CATTR_BOLD)
2677 ltputs(sc_b_in, 1, f_putc);
2678 if (cattr & CATTR_BLINK)
2679 ltputs(sc_bl_in, 1, f_putc);
2680 if (cattr & CATTR_STANDOUT)
2681 ltputs(sc_s_in, 1, f_putc);
2682 }
2683
tput_color(constant char * str,int (* f_putc)(int))2684 static void tput_color(constant char *str, int (*f_putc)(int))
2685 {
2686 int fg;
2687 int bg;
2688 CHAR_ATTR cattr;
2689
2690 if (str != NULL && strcmp(str, "*") == 0)
2691 {
2692 /* Special case: reset to normal */
2693 tput_fmt(ESCS"[m", -1, f_putc);
2694 return;
2695 }
2696 switch (parse_color(str, &fg, &bg, &cattr))
2697 {
2698 case CT_4BIT:
2699 if (fg >= 0)
2700 tput_fmt(ESCS"[%dm", sgr_color(fg), f_putc);
2701 if (bg >= 0)
2702 tput_fmt(ESCS"[%dm", sgr_color(bg)+10, f_putc);
2703 tput_char_cattr(cattr, f_putc);
2704 break;
2705 case CT_6BIT:
2706 if (fg >= 0)
2707 tput_fmt(ESCS"[38;5;%dm", fg, f_putc);
2708 if (bg >= 0)
2709 tput_fmt(ESCS"[48;5;%dm", bg, f_putc);
2710 tput_char_cattr(cattr, f_putc);
2711 break;
2712 default:
2713 break;
2714 }
2715 }
2716
tput_inmode(constant char * mode_str,int attr,int attr_bit,int (* f_putc)(int))2717 static void tput_inmode(constant char *mode_str, int attr, int attr_bit, int (*f_putc)(int))
2718 {
2719 constant char *color_str;
2720 if ((attr & attr_bit) == 0)
2721 return;
2722 color_str = get_color_map(attr_bit);
2723 if (color_str == NULL || *color_str == '\0' || *color_str == '+')
2724 {
2725 ltputs(mode_str, 1, f_putc);
2726 if (color_str == NULL || *color_str++ != '+')
2727 return;
2728 }
2729 /* Color overrides mode string */
2730 tput_color(color_str, f_putc);
2731 }
2732
tput_outmode(constant char * mode_str,int attr_bit,int (* f_putc)(int))2733 static void tput_outmode(constant char *mode_str, int attr_bit, int (*f_putc)(int))
2734 {
2735 if ((attrmode & attr_bit) == 0)
2736 return;
2737 ltputs(mode_str, 1, f_putc);
2738 }
2739
2740 #else /* MSDOS_COMPILER */
2741
2742 #if MSDOS_COMPILER==WIN32C
WIN32put_fmt(constant char * fmt,int color)2743 static lbool WIN32put_fmt(constant char *fmt, int color)
2744 {
2745 char buf[INT_STRLEN_BOUND(int)+16];
2746 int len = (size_t) SNPRINTF1(buf, sizeof(buf), fmt, color);
2747 if (len > 0)
2748 WIN32textout(buf, (size_t) len);
2749 return TRUE;
2750 }
2751
win_set_cattr(CHAR_ATTR cattr)2752 static void win_set_cattr(CHAR_ATTR cattr)
2753 {
2754 if (cattr & CATTR_UNDERLINE)
2755 WIN32textout(ESCS"[4m", 4);
2756 if (cattr & CATTR_BOLD)
2757 WIN32textout(ESCS"[1m", 4);
2758 if (cattr & CATTR_BLINK)
2759 WIN32textout(ESCS"[5m", 4);
2760 if (cattr & CATTR_STANDOUT)
2761 WIN32textout(ESCS"[7m", 4);
2762 }
2763 #endif
2764
win_set_color(int attr)2765 static lbool win_set_color(int attr)
2766 {
2767 int fg;
2768 int bg;
2769 CHAR_ATTR cattr;
2770 lbool out = FALSE;
2771 constant char *str = get_color_map(attr);
2772 if (str == NULL || str[0] == '\0')
2773 return FALSE;
2774 switch (parse_color(str, &fg, &bg, &cattr))
2775 {
2776 case CT_4BIT:
2777 if (fg >= 0 && bg >= 0)
2778 {
2779 SETCOLORS(fg, bg);
2780 out = TRUE;
2781 } else if (fg >= 0)
2782 {
2783 SET_FG_COLOR(fg);
2784 out = TRUE;
2785 } else if (bg >= 0)
2786 {
2787 SET_BG_COLOR(bg);
2788 out = TRUE;
2789 }
2790 #if MSDOS_COMPILER==WIN32C
2791 if (vt_enabled)
2792 win_set_cattr(cattr);
2793 #endif
2794 break;
2795 #if MSDOS_COMPILER==WIN32C
2796 case CT_6BIT:
2797 if (vt_enabled)
2798 {
2799 if (fg > 0)
2800 out = WIN32put_fmt(ESCS"[38;5;%dm", fg);
2801 if (bg > 0)
2802 out = WIN32put_fmt(ESCS"[48;5;%dm", bg);
2803 win_set_cattr(cattr);
2804 }
2805 break;
2806 #endif
2807 default:
2808 break;
2809 }
2810 return out;
2811 }
2812
2813 #endif /* MSDOS_COMPILER */
2814
at_enter(int attr)2815 public void at_enter(int attr)
2816 {
2817 attr = apply_at_specials(attr);
2818 #if !MSDOS_COMPILER
2819 /* The one with the most priority is last. */
2820 tput_inmode(sc_u_in, attr, AT_UNDERLINE, putchr);
2821 tput_inmode(sc_b_in, attr, AT_BOLD, putchr);
2822 tput_inmode(sc_bl_in, attr, AT_BLINK, putchr);
2823 /* Don't use standout and color at the same time. */
2824 if (use_color && (attr & AT_COLOR))
2825 tput_color(get_color_map(attr), putchr);
2826 else
2827 tput_inmode(sc_s_in, attr, AT_STANDOUT, putchr);
2828 #else
2829 flush();
2830 /* The one with the most priority is first. */
2831 if ((attr & AT_COLOR) && use_color)
2832 {
2833 win_set_color(attr);
2834 } else if (attr & AT_STANDOUT)
2835 {
2836 SETCOLORS(so_fg_color, so_bg_color);
2837 } else if (attr & AT_BLINK)
2838 {
2839 SETCOLORS(bl_fg_color, bl_bg_color);
2840 } else if (attr & AT_BOLD)
2841 {
2842 SETCOLORS(bo_fg_color, bo_bg_color);
2843 } else if (attr & AT_UNDERLINE)
2844 {
2845 SETCOLORS(ul_fg_color, ul_bg_color);
2846 }
2847 #endif
2848 attrmode = attr;
2849 }
2850
at_exit(void)2851 public void at_exit(void)
2852 {
2853 #if !MSDOS_COMPILER
2854 /* Undo things in the reverse order we did them. */
2855 tput_color("*", putchr);
2856 tput_outmode(sc_s_out, AT_STANDOUT, putchr);
2857 tput_outmode(sc_bl_out, AT_BLINK, putchr);
2858 tput_outmode(sc_b_out, AT_BOLD, putchr);
2859 tput_outmode(sc_u_out, AT_UNDERLINE, putchr);
2860 #else
2861 flush();
2862 SETCOLORS(nm_fg_color, nm_bg_color);
2863 #endif
2864 attrmode = AT_NORMAL;
2865 }
2866
at_switch(int attr)2867 public void at_switch(int attr)
2868 {
2869 int new_attrmode = apply_at_specials(attr);
2870 int ignore_modes = AT_ANSI;
2871
2872 if ((new_attrmode & ~ignore_modes) != (attrmode & ~ignore_modes))
2873 {
2874 at_exit();
2875 at_enter(attr);
2876 }
2877 }
2878
is_at_equiv(int attr1,int attr2)2879 public lbool is_at_equiv(int attr1, int attr2)
2880 {
2881 attr1 = apply_at_specials(attr1);
2882 attr2 = apply_at_specials(attr2);
2883
2884 return (attr1 == attr2);
2885 }
2886
apply_at_specials(int attr)2887 public int apply_at_specials(int attr)
2888 {
2889 if (attr & AT_BINARY)
2890 attr |= binattr;
2891 if (attr & AT_HILITE)
2892 attr |= AT_STANDOUT;
2893 attr &= ~(AT_BINARY|AT_HILITE);
2894
2895 return attr;
2896 }
2897
2898 /*
2899 * Output a plain backspace, without erasing the previous char.
2900 */
putbs(void)2901 public void putbs(void)
2902 {
2903 if (termcap_debug)
2904 putstr("<bs>");
2905 else
2906 {
2907 #if !MSDOS_COMPILER
2908 ltputs(sc_backspace, 1, putchr);
2909 #else
2910 int row, col;
2911
2912 flush();
2913 {
2914 #if MSDOS_COMPILER==MSOFTC
2915 struct rccoord tpos;
2916 tpos = _gettextposition();
2917 row = tpos.row;
2918 col = tpos.col;
2919 #else
2920 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
2921 row = wherey();
2922 col = wherex();
2923 #else
2924 #if MSDOS_COMPILER==WIN32C
2925 CONSOLE_SCREEN_BUFFER_INFO scr;
2926 GetConsoleScreenBufferInfo(con_out, &scr);
2927 row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1;
2928 col = scr.dwCursorPosition.X - scr.srWindow.Left + 1;
2929 #endif
2930 #endif
2931 #endif
2932 }
2933 if (col <= 1)
2934 return;
2935 _settextposition(row, col-1);
2936 #endif /* MSDOS_COMPILER */
2937 }
2938 }
2939
2940 #if MSDOS_COMPILER==WIN32C
2941
2942 #define WIN32_MAX_REPEAT 3
2943 #define LAST_DOWN_COUNT 8
2944 static LWCHAR last_downs[LAST_DOWN_COUNT] = { 0 };
2945 static int last_down_index = 0;
2946 static LWCHAR hi_surr = 0;
2947
2948 typedef struct XINPUT_RECORD {
2949 INPUT_RECORD ir;
2950 LWCHAR ichar; /* because ir...UnicodeChar is only 16 bits */
2951 } XINPUT_RECORD;
2952
2953 typedef struct WIN32_CHAR {
2954 struct WIN32_CHAR *wc_next;
2955 char wc_ch;
2956 } WIN32_CHAR;
2957
2958 static WIN32_CHAR *win32_queue = NULL;
2959
2960 /*
2961 * Is the win32_queue nonempty?
2962 */
win32_queued_char(void)2963 static int win32_queued_char(void)
2964 {
2965 return (win32_queue != NULL);
2966 }
2967
2968 /*
2969 * Push a char onto the back of the win32_queue.
2970 */
win32_enqueue(char ch)2971 static void win32_enqueue(char ch)
2972 {
2973 WIN32_CHAR *wch = (WIN32_CHAR *) ecalloc(1, sizeof(WIN32_CHAR));
2974 wch->wc_ch = ch;
2975 wch->wc_next = NULL;
2976 if (win32_queue == NULL)
2977 win32_queue = wch;
2978 else
2979 {
2980 WIN32_CHAR *pch;
2981 for (pch = win32_queue; pch->wc_next != NULL; pch = pch->wc_next)
2982 continue;
2983 pch->wc_next = wch;
2984 }
2985 }
2986
2987 /*
2988 * Push a char onto the front of the win32_queue.
2989 * Makes the next call to WIN32getch return ch.
2990 */
WIN32ungetch(int ch)2991 public void WIN32ungetch(int ch)
2992 {
2993 WIN32_CHAR *wch = (WIN32_CHAR *) ecalloc(1, sizeof(WIN32_CHAR));
2994 wch->wc_ch = ch;
2995 wch->wc_next = win32_queue;
2996 win32_queue = wch;
2997 }
2998
2999 /*
3000 * Get a char from the front of the win32_queue.
3001 */
win32_get_queue(void)3002 static char win32_get_queue(void)
3003 {
3004 WIN32_CHAR *wch = win32_queue;
3005 char ch = wch->wc_ch;
3006 win32_queue = wch->wc_next;
3007 free(wch);
3008 return ch;
3009 }
3010
3011 /*
3012 * Handle a mouse input event.
3013 */
win32_mouse_event(XINPUT_RECORD * xip)3014 static lbool win32_mouse_event(XINPUT_RECORD *xip)
3015 {
3016 char b;
3017
3018 if (!mousecap || xip->ir.EventType != MOUSE_EVENT)
3019 return (FALSE);
3020
3021 /* Generate an X11 mouse sequence from the mouse event. */
3022 /* TODO: switch to the 1006 protocol to allow specific-button-up reports */
3023 switch (xip->ir.Event.MouseEvent.dwEventFlags)
3024 {
3025 case 0: /* press or release */
3026 if (xip->ir.Event.MouseEvent.dwButtonState == 0)
3027 b = X11MOUSE_OFFSET + X11MOUSE_BUTTON_REL;
3028 else if (xip->ir.Event.MouseEvent.dwButtonState == 1) /* leftmost */
3029 b = X11MOUSE_OFFSET + X11MOUSE_BUTTON1;
3030 else if (xip->ir.Event.MouseEvent.dwButtonState == 2) /* rightmost */
3031 b = X11MOUSE_OFFSET + X11MOUSE_BUTTON3;
3032 else if (xip->ir.Event.MouseEvent.dwButtonState == 4) /* middle ("next-to-leftmost") */
3033 b = X11MOUSE_OFFSET + X11MOUSE_BUTTON2;
3034 else /* don't bother to figure out what changed */
3035 return (FALSE);
3036 break;
3037 case MOUSE_WHEELED:
3038 b = X11MOUSE_OFFSET + (((int)xip->ir.Event.MouseEvent.dwButtonState < 0) ? X11MOUSE_WHEEL_DOWN : X11MOUSE_WHEEL_UP);
3039 break;
3040 case MOUSE_MOVED:
3041 if (xip->ir.Event.MouseEvent.dwButtonState != 1)
3042 return (FALSE);
3043 /* Drag with left button down. */
3044 b = X11MOUSE_OFFSET + X11MOUSE_DRAG;
3045 break;
3046 default:
3047 return (FALSE);
3048 }
3049 /* {{ TODO: change to X11 1006 format. }} */
3050 win32_enqueue(ESC);
3051 win32_enqueue('[');
3052 win32_enqueue('M');
3053 win32_enqueue(b);
3054 win32_enqueue(X11MOUSE_OFFSET + xip->ir.Event.MouseEvent.dwMousePosition.X + 1);
3055 win32_enqueue(X11MOUSE_OFFSET + xip->ir.Event.MouseEvent.dwMousePosition.Y + 1);
3056 return (TRUE);
3057 }
3058
set_last_down(LWCHAR ch)3059 static void set_last_down(LWCHAR ch)
3060 {
3061 if (ch == 0) return;
3062 last_downs[last_down_index] = ch;
3063 if (++last_down_index >= LAST_DOWN_COUNT)
3064 last_down_index = 0;
3065 }
3066
find_last_down(LWCHAR ch)3067 static LWCHAR *find_last_down(LWCHAR ch)
3068 {
3069 int i;
3070 for (i = 0; i < LAST_DOWN_COUNT; ++i)
3071 if (last_downs[i] == ch)
3072 return &last_downs[i];
3073 return NULL;
3074 }
3075
3076 /*
3077 * Get an input char from an INPUT_RECORD and store in xip->ichar.
3078 * Handles surrogate chars, and KeyUp without previous corresponding KeyDown.
3079 */
win32_get_ichar(XINPUT_RECORD * xip)3080 static lbool win32_get_ichar(XINPUT_RECORD *xip)
3081 {
3082 LWCHAR ch = xip->ir.Event.KeyEvent.uChar.UnicodeChar;
3083 xip->ichar = ch;
3084 if (!is_ascii_char(ch))
3085 {
3086 int is_down = xip->ir.Event.KeyEvent.bKeyDown;
3087 LWCHAR *last_down = find_last_down(ch);
3088 if (last_down == NULL) { /* key was up */
3089 if (is_down) { /* key was up, now is down */
3090 set_last_down(ch);
3091 } else { /* key up without previous down: pretend this is a down. */
3092 xip->ir.Event.KeyEvent.bKeyDown = 1;
3093 }
3094 } else if (!is_down) { /* key was down, now is up */
3095 *last_down = 0; /* use this last_down only once */
3096 }
3097
3098 if (ch >= 0xD800 && ch < 0xDC00) { /* high surrogate */
3099 hi_surr = 0x10000 + ((ch - 0xD800) << 10);
3100 return (FALSE); /* get next input, which should be the low surrogate */
3101 }
3102 if (ch >= 0xDC00 && ch < 0xE000) { /* low surrogate */
3103 xip->ichar = hi_surr + (ch - 0xDC00);
3104 hi_surr = 0;
3105 }
3106 }
3107 return (TRUE);
3108 }
3109
3110 /*
3111 * Handle a scan code (non-ASCII) key input.
3112 */
win32_scan_code(XINPUT_RECORD * xip)3113 static lbool win32_scan_code(XINPUT_RECORD *xip)
3114 {
3115 int scan = -1;
3116 if (xip->ir.Event.KeyEvent.dwControlKeyState & (LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED))
3117 {
3118 switch (xip->ir.Event.KeyEvent.wVirtualScanCode)
3119 {
3120 case PCK_RIGHT: /* right arrow */
3121 scan = PCK_CTL_RIGHT;
3122 break;
3123 case PCK_LEFT: /* left arrow */
3124 scan = PCK_CTL_LEFT;
3125 break;
3126 case PCK_DELETE: /* delete */
3127 scan = PCK_CTL_DELETE;
3128 break;
3129 }
3130 } else if (xip->ir.Event.KeyEvent.dwControlKeyState & SHIFT_PRESSED)
3131 {
3132 if (xip->ichar == '\t')
3133 scan = PCK_SHIFT_TAB;
3134 }
3135 if (scan < 0 && xip->ichar == 0)
3136 scan = xip->ir.Event.KeyEvent.wVirtualScanCode;
3137 if (scan < 0)
3138 return (FALSE);
3139 /*
3140 * An extended key returns a 2 byte sequence consisting of
3141 * a zero byte followed by the scan code.
3142 */
3143 win32_enqueue('\0');
3144 win32_enqueue(scan);
3145 return (TRUE);
3146 }
3147
3148 /*
3149 * Handle a key input event.
3150 */
win32_key_event(XINPUT_RECORD * xip)3151 static lbool win32_key_event(XINPUT_RECORD *xip)
3152 {
3153 int repeat;
3154 char utf8[UTF8_MAX_LENGTH];
3155 char *up;
3156
3157 if (xip->ir.EventType != KEY_EVENT ||
3158 ((xip->ir.Event.KeyEvent.dwControlKeyState & (RIGHT_ALT_PRESSED|LEFT_CTRL_PRESSED)) == (RIGHT_ALT_PRESSED|LEFT_CTRL_PRESSED) && xip->ir.Event.KeyEvent.uChar.UnicodeChar == 0) ||
3159 (xip->ir.Event.KeyEvent.wVirtualScanCode == 0 && xip->ir.Event.KeyEvent.uChar.UnicodeChar == 0) ||
3160 xip->ir.Event.KeyEvent.wVirtualScanCode == PCK_CAPS_LOCK ||
3161 xip->ir.Event.KeyEvent.wVirtualScanCode == PCK_NUM_LOCK ||
3162 (xip->ir.Event.KeyEvent.wVirtualKeyCode == VK_MENU && xip->ir.Event.KeyEvent.uChar.UnicodeChar == 0) ||
3163 xip->ir.Event.KeyEvent.wVirtualKeyCode == VK_KANJI ||
3164 xip->ir.Event.KeyEvent.wVirtualKeyCode == VK_SHIFT ||
3165 xip->ir.Event.KeyEvent.wVirtualKeyCode == VK_CONTROL)
3166 return (FALSE);
3167
3168 if (!win32_get_ichar(xip))
3169 return (FALSE);
3170 if (!xip->ir.Event.KeyEvent.bKeyDown)
3171 return (FALSE);
3172
3173 if (win32_scan_code(xip))
3174 return (TRUE);
3175
3176 repeat = xip->ir.Event.KeyEvent.wRepeatCount;
3177 if (repeat > WIN32_MAX_REPEAT)
3178 repeat = WIN32_MAX_REPEAT;
3179 up = utf8;
3180 put_wchar(&up, xip->ichar);
3181 for (; repeat > 0; --repeat)
3182 {
3183 constant char *p;
3184 for (p = utf8; p < up; ++p)
3185 win32_enqueue(*p);
3186 }
3187 return (TRUE);
3188 }
3189
3190 /*
3191 * Determine whether an input character is waiting to be read.
3192 */
win32_kbhit2(lbool no_queued)3193 public lbool win32_kbhit2(lbool no_queued)
3194 {
3195 XINPUT_RECORD xip;
3196
3197 if (!no_queued && win32_queued_char())
3198 return (TRUE);
3199
3200 for (;;)
3201 {
3202 DWORD nread;
3203 DWORD console_input_mode;
3204 /*
3205 * When an input pipe closes, cmd may reset the console mode,
3206 * so set the mode every time we read input.
3207 */
3208 if (GetConsoleMode(tty, &console_input_mode) && console_input_mode != curr_console_input_mode)
3209 SetConsoleMode(tty, curr_console_input_mode);
3210 PeekConsoleInputW(tty, &xip.ir, 1, &nread);
3211 if (nread == 0)
3212 return (FALSE);
3213 ReadConsoleInputW(tty, &xip.ir, 1, &nread);
3214 if (nread == 0)
3215 return (FALSE);
3216 if (win32_mouse_event(&xip) || win32_key_event(&xip))
3217 break;
3218 }
3219 return (TRUE);
3220 }
3221
win32_kbhit(void)3222 public lbool win32_kbhit(void)
3223 {
3224 return win32_kbhit2(FALSE);
3225 }
3226
3227 /*
3228 * Read a character from the keyboard.
3229 */
WIN32getch(void)3230 public char WIN32getch(void)
3231 {
3232 while (!win32_kbhit())
3233 {
3234 Sleep(20);
3235 if (ABORT_SIGS())
3236 return ('\003');
3237 }
3238 return (win32_get_queue());
3239 }
3240
win32_getch_clear(void)3241 public void win32_getch_clear(void)
3242 {
3243 while (win32_kbhit())
3244 (void) WIN32getch();
3245 }
3246
3247 #endif /* MSDOS_COMPILER==WIN32C */
3248
3249 #if MSDOS_COMPILER
3250 /*
3251 */
WIN32setcolors(int fg,int bg)3252 public void WIN32setcolors(int fg, int bg)
3253 {
3254 SETCOLORS(fg, bg);
3255 }
3256
3257 /*
3258 */
WIN32textout(constant char * text,size_t len)3259 public void WIN32textout(constant char *text, size_t len)
3260 {
3261 #if MSDOS_COMPILER==WIN32C
3262 DWORD written;
3263 if (utf_mode == 2)
3264 {
3265 /*
3266 * We've got UTF-8 text in a non-UTF-8 console. Convert it to
3267 * wide and use WriteConsoleW.
3268 * Biggest input len is OUTBUF_SIZE of obuf from win_flush,
3269 * which is also the biggest output count if it's ASCII.
3270 * "static" wtext is not a state - only avoid 16K on stack.
3271 */
3272 static WCHAR wtext[OUTBUF_SIZE];
3273 len = MultiByteToWideChar(CP_UTF8, 0, text, len, wtext, countof(wtext));
3274 WriteConsoleW(con_out, wtext, len, &written, NULL);
3275 } else
3276 WriteConsole(con_out, text, (DWORD) len, &written, NULL);
3277 #else
3278 char buf[2048];
3279 if (len >= sizeof(buf))
3280 len = sizeof(buf) - 1;
3281 memcpy(buf, text, len);
3282 buf[len] = 0;
3283 cputs(buf);
3284 #endif
3285 }
3286 #endif
3287