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