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Bring in an errno.9 manual page (based on NetBSD's).
[dragonfly.git] / contrib / less / screen.c
blob8f8a433aff64f393d1ce93f365502b9e355db7ca
1 /*
2 * Copyright (C) 1984-2015 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 #else
39
40 #if HAVE_SYS_IOCTL_H
41 #include <sys/ioctl.h>
42 #endif
43
44 #if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS
45 #include <termios.h>
46 #else
47 #if HAVE_TERMIO_H
48 #include <termio.h>
49 #else
50 #if HAVE_SGSTAT_H
51 #include <sgstat.h>
52 #else
53 #include <sgtty.h>
54 #endif
55 #endif
56 #endif
57
58 #if HAVE_TERMCAP_H
59 #include <termcap.h>
60 #endif
61 #ifdef _OSK
62 #include <signal.h>
63 #endif
64 #if OS2
65 #include <sys/signal.h>
66 #include "pckeys.h"
67 #endif
68 #if HAVE_SYS_STREAM_H
69 #include <sys/stream.h>
70 #endif
71 #if HAVE_SYS_PTEM_H
72 #include <sys/ptem.h>
73 #endif
74
75 #endif /* MSDOS_COMPILER */
76
77 /*
78 * Check for broken termios package that forces you to manually
79 * set the line discipline.
80 */
81 #ifdef __ultrix__
82 #define MUST_SET_LINE_DISCIPLINE 1
83 #else
84 #define MUST_SET_LINE_DISCIPLINE 0
85 #endif
86
87 #if OS2
88 #define DEFAULT_TERM "ansi"
89 static char *windowid;
90 #else
91 #define DEFAULT_TERM "unknown"
92 #endif
93
94 #if MSDOS_COMPILER==MSOFTC
95 static int videopages;
96 static long msec_loops;
97 static int flash_created = 0;
98 #define SETCOLORS(fg,bg) { _settextcolor(fg); _setbkcolor(bg); }
99 #endif
100
101 #if MSDOS_COMPILER==BORLANDC
102 static unsigned short *whitescreen;
103 static int flash_created = 0;
104 #endif
105 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
106 #define _settextposition(y,x) gotoxy(x,y)
107 #define _clearscreen(m) clrscr()
108 #define _outtext(s) cputs(s)
109 #define SETCOLORS(fg,bg) { textcolor(fg); textbackground(bg); }
110 extern int sc_height;
111 #endif
112
113 #if MSDOS_COMPILER==WIN32C
114 struct keyRecord
115 {
116 int ascii;
117 int scan;
118 } currentKey;
119
120 static int keyCount = 0;
121 static WORD curr_attr;
122 static int pending_scancode = 0;
123 static WORD *whitescreen;
124
125 static HANDLE con_out_save = INVALID_HANDLE_VALUE; /* previous console */
126 static HANDLE con_out_ours = INVALID_HANDLE_VALUE; /* our own */
127 HANDLE con_out = INVALID_HANDLE_VALUE; /* current console */
128
129 extern int quitting;
130 static void win32_init_term();
131 static void win32_deinit_term();
132
133 #define FG_COLORS (FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_INTENSITY)
134 #define BG_COLORS (BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE | BACKGROUND_INTENSITY)
135 #define MAKEATTR(fg,bg) ((WORD)((fg)|((bg)<<4)))
136 #define SETCOLORS(fg,bg) { curr_attr = MAKEATTR(fg,bg); \
137 if (SetConsoleTextAttribute(con_out, curr_attr) == 0) \
138 error("SETCOLORS failed"); }
139 #endif
140
141 #if MSDOS_COMPILER
142 public int nm_fg_color; /* Color of normal text */
143 public int nm_bg_color;
144 public int bo_fg_color; /* Color of bold text */
145 public int bo_bg_color;
146 public int ul_fg_color; /* Color of underlined text */
147 public int ul_bg_color;
148 public int so_fg_color; /* Color of standout text */
149 public int so_bg_color;
150 public int bl_fg_color; /* Color of blinking text */
151 public int bl_bg_color;
152 static int sy_fg_color; /* Color of system text (before less) */
153 static int sy_bg_color;
154
155 #else
156
157 /*
158 * Strings passed to tputs() to do various terminal functions.
159 */
160 static char
161 *sc_pad, /* Pad string */
162 *sc_home, /* Cursor home */
163 *sc_addline, /* Add line, scroll down following lines */
164 *sc_lower_left, /* Cursor to last line, first column */
165 *sc_return, /* Cursor to beginning of current line */
166 *sc_move, /* General cursor positioning */
167 *sc_clear, /* Clear screen */
168 *sc_eol_clear, /* Clear to end of line */
169 *sc_eos_clear, /* Clear to end of screen */
170 *sc_s_in, /* Enter standout (highlighted) mode */
171 *sc_s_out, /* Exit standout mode */
172 *sc_u_in, /* Enter underline mode */
173 *sc_u_out, /* Exit underline mode */
174 *sc_b_in, /* Enter bold mode */
175 *sc_b_out, /* Exit bold mode */
176 *sc_bl_in, /* Enter blink mode */
177 *sc_bl_out, /* Exit blink mode */
178 *sc_visual_bell, /* Visual bell (flash screen) sequence */
179 *sc_backspace, /* Backspace cursor */
180 *sc_s_keypad, /* Start keypad mode */
181 *sc_e_keypad, /* End keypad mode */
182 *sc_init, /* Startup terminal initialization */
183 *sc_deinit; /* Exit terminal de-initialization */
184 #endif
185
186 static int init_done = 0;
187
188 public int auto_wrap; /* Terminal does \r\n when write past margin */
189 public int ignaw; /* Terminal ignores \n immediately after wrap */
190 public int erase_char; /* The user's erase char */
191 public int erase2_char; /* The user's other erase char */
192 public int kill_char; /* The user's line-kill char */
193 public int werase_char; /* The user's word-erase char */
194 public int sc_width, sc_height; /* Height & width of screen */
195 public int bo_s_width, bo_e_width; /* Printing width of boldface seq */
196 public int ul_s_width, ul_e_width; /* Printing width of underline seq */
197 public int so_s_width, so_e_width; /* Printing width of standout seq */
198 public int bl_s_width, bl_e_width; /* Printing width of blink seq */
199 public int above_mem, below_mem; /* Memory retained above/below screen */
200 public int can_goto_line; /* Can move cursor to any line */
201 public int clear_bg; /* Clear fills with background color */
202 public int missing_cap = 0; /* Some capability is missing */
203
204 static int attrmode = AT_NORMAL;
205 extern int binattr;
206
207 #if !MSDOS_COMPILER
208 static char *cheaper();
209 static void tmodes();
210 #endif
211
212 /*
213 * These two variables are sometimes defined in,
214 * and needed by, the termcap library.
215 */
216 #if MUST_DEFINE_OSPEED
217 extern short ospeed; /* Terminal output baud rate */
218 extern char PC; /* Pad character */
219 #endif
220 #ifdef _OSK
221 short ospeed;
222 char PC_, *UP, *BC;
223 #endif
224
225 extern int quiet; /* If VERY_QUIET, use visual bell for bell */
226 extern int no_back_scroll;
227 extern int swindow;
228 extern int no_init;
229 extern int no_keypad;
230 extern int sigs;
231 extern int wscroll;
232 extern int screen_trashed;
233 extern int tty;
234 extern int top_scroll;
235 extern int oldbot;
236 #if HILITE_SEARCH
237 extern int hilite_search;
238 #endif
239
240 extern char *tgetstr();
241 extern char *tgoto();
242
243
244 /*
245 * Change terminal to "raw mode", or restore to "normal" mode.
246 * "Raw mode" means
247 * 1. An outstanding read will complete on receipt of a single keystroke.
248 * 2. Input is not echoed.
249 * 3. On output, \n is mapped to \r\n.
250 * 4. \t is NOT expanded into spaces.
251 * 5. Signal-causing characters such as ctrl-C (interrupt),
252 * etc. are NOT disabled.
253 * It doesn't matter whether an input \n is mapped to \r, or vice versa.
254 */
255 public void
256 raw_mode(on)
257 int on;
258 {
259 static int curr_on = 0;
260
261 if (on == curr_on)
262 return;
263 erase2_char = '\b'; /* in case OS doesn't know about erase2 */
264 #if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS
265 {
266 struct termios s;
267 static struct termios save_term;
268 static int saved_term = 0;
269
270 if (on)
271 {
272 /*
273 * Get terminal modes.
274 */
275 tcgetattr(tty, &s);
276
277 /*
278 * Save modes and set certain variables dependent on modes.
279 */
280 if (!saved_term)
281 {
282 save_term = s;
283 saved_term = 1;
284 }
285 #if HAVE_OSPEED
286 switch (cfgetospeed(&s))
287 {
288 #ifdef B0
289 case B0: ospeed = 0; break;
290 #endif
291 #ifdef B50
292 case B50: ospeed = 1; break;
293 #endif
294 #ifdef B75
295 case B75: ospeed = 2; break;
296 #endif
297 #ifdef B110
298 case B110: ospeed = 3; break;
299 #endif
300 #ifdef B134
301 case B134: ospeed = 4; break;
302 #endif
303 #ifdef B150
304 case B150: ospeed = 5; break;
305 #endif
306 #ifdef B200
307 case B200: ospeed = 6; break;
308 #endif
309 #ifdef B300
310 case B300: ospeed = 7; break;
311 #endif
312 #ifdef B600
313 case B600: ospeed = 8; break;
314 #endif
315 #ifdef B1200
316 case B1200: ospeed = 9; break;
317 #endif
318 #ifdef B1800
319 case B1800: ospeed = 10; break;
320 #endif
321 #ifdef B2400
322 case B2400: ospeed = 11; break;
323 #endif
324 #ifdef B4800
325 case B4800: ospeed = 12; break;
326 #endif
327 #ifdef B9600
328 case B9600: ospeed = 13; break;
329 #endif
330 #ifdef EXTA
331 case EXTA: ospeed = 14; break;
332 #endif
333 #ifdef EXTB
334 case EXTB: ospeed = 15; break;
335 #endif
336 #ifdef B57600
337 case B57600: ospeed = 16; break;
338 #endif
339 #ifdef B115200
340 case B115200: ospeed = 17; break;
341 #endif
342 default: ;
343 }
344 #endif
345 erase_char = s.c_cc[VERASE];
346 #ifdef VERASE2
347 erase2_char = s.c_cc[VERASE2];
348 #endif
349 kill_char = s.c_cc[VKILL];
350 #ifdef VWERASE
351 werase_char = s.c_cc[VWERASE];
352 #else
353 werase_char = CONTROL('W');
354 #endif
355
356 /*
357 * Set the modes to the way we want them.
358 */
359 s.c_lflag &= ~(0
360 #ifdef ICANON
361 | ICANON
362 #endif
363 #ifdef ECHO
364 | ECHO
365 #endif
366 #ifdef ECHOE
367 | ECHOE
368 #endif
369 #ifdef ECHOK
370 | ECHOK
371 #endif
372 #if ECHONL
373 | ECHONL
374 #endif
375 );
376
377 s.c_oflag |= (0
378 #ifdef OXTABS
379 | OXTABS
380 #else
381 #ifdef TAB3
382 | TAB3
383 #else
384 #ifdef XTABS
385 | XTABS
386 #endif
387 #endif
388 #endif
389 #ifdef OPOST
390 | OPOST
391 #endif
392 #ifdef ONLCR
393 | ONLCR
394 #endif
395 );
396
397 s.c_oflag &= ~(0
398 #ifdef ONOEOT
399 | ONOEOT
400 #endif
401 #ifdef OCRNL
402 | OCRNL
403 #endif
404 #ifdef ONOCR
405 | ONOCR
406 #endif
407 #ifdef ONLRET
408 | ONLRET
409 #endif
410 );
411 s.c_cc[VMIN] = 1;
412 s.c_cc[VTIME] = 0;
413 #ifdef VLNEXT
414 s.c_cc[VLNEXT] = 0;
415 #endif
416 #ifdef VDSUSP
417 s.c_cc[VDSUSP] = 0;
418 #endif
419 #if MUST_SET_LINE_DISCIPLINE
420 /*
421 * System's termios is broken; need to explicitly
422 * request TERMIODISC line discipline.
423 */
424 s.c_line = TERMIODISC;
425 #endif
426 } else
427 {
428 /*
429 * Restore saved modes.
430 */
431 s = save_term;
432 }
433 #if HAVE_FSYNC
434 fsync(tty);
435 #endif
436 tcsetattr(tty, TCSADRAIN, &s);
437 #if MUST_SET_LINE_DISCIPLINE
438 if (!on)
439 {
440 /*
441 * Broken termios *ignores* any line discipline
442 * except TERMIODISC. A different old line discipline
443 * is therefore not restored, yet. Restore the old
444 * line discipline by hand.
445 */
446 ioctl(tty, TIOCSETD, &save_term.c_line);
447 }
448 #endif
449 }
450 #else
451 #ifdef TCGETA
452 {
453 struct termio s;
454 static struct termio save_term;
455 static int saved_term = 0;
456
457 if (on)
458 {
459 /*
460 * Get terminal modes.
461 */
462 ioctl(tty, TCGETA, &s);
463
464 /*
465 * Save modes and set certain variables dependent on modes.
466 */
467 if (!saved_term)
468 {
469 save_term = s;
470 saved_term = 1;
471 }
472 #if HAVE_OSPEED
473 ospeed = s.c_cflag & CBAUD;
474 #endif
475 erase_char = s.c_cc[VERASE];
476 kill_char = s.c_cc[VKILL];
477 #ifdef VWERASE
478 werase_char = s.c_cc[VWERASE];
479 #else
480 werase_char = CONTROL('W');
481 #endif
482
483 /*
484 * Set the modes to the way we want them.
485 */
486 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL);
487 s.c_oflag |= (OPOST|ONLCR|TAB3);
488 s.c_oflag &= ~(OCRNL|ONOCR|ONLRET);
489 s.c_cc[VMIN] = 1;
490 s.c_cc[VTIME] = 0;
491 } else
492 {
493 /*
494 * Restore saved modes.
495 */
496 s = save_term;
497 }
498 ioctl(tty, TCSETAW, &s);
499 }
500 #else
501 #ifdef TIOCGETP
502 {
503 struct sgttyb s;
504 static struct sgttyb save_term;
505 static int saved_term = 0;
506
507 if (on)
508 {
509 /*
510 * Get terminal modes.
511 */
512 ioctl(tty, TIOCGETP, &s);
513
514 /*
515 * Save modes and set certain variables dependent on modes.
516 */
517 if (!saved_term)
518 {
519 save_term = s;
520 saved_term = 1;
521 }
522 #if HAVE_OSPEED
523 ospeed = s.sg_ospeed;
524 #endif
525 erase_char = s.sg_erase;
526 kill_char = s.sg_kill;
527 werase_char = CONTROL('W');
528
529 /*
530 * Set the modes to the way we want them.
531 */
532 s.sg_flags |= CBREAK;
533 s.sg_flags &= ~(ECHO|XTABS);
534 } else
535 {
536 /*
537 * Restore saved modes.
538 */
539 s = save_term;
540 }
541 ioctl(tty, TIOCSETN, &s);
542 }
543 #else
544 #ifdef _OSK
545 {
546 struct sgbuf s;
547 static struct sgbuf save_term;
548 static int saved_term = 0;
549
550 if (on)
551 {
552 /*
553 * Get terminal modes.
554 */
555 _gs_opt(tty, &s);
556
557 /*
558 * Save modes and set certain variables dependent on modes.
559 */
560 if (!saved_term)
561 {
562 save_term = s;
563 saved_term = 1;
564 }
565 erase_char = s.sg_bspch;
566 kill_char = s.sg_dlnch;
567 werase_char = CONTROL('W');
568
569 /*
570 * Set the modes to the way we want them.
571 */
572 s.sg_echo = 0;
573 s.sg_eofch = 0;
574 s.sg_pause = 0;
575 s.sg_psch = 0;
576 } else
577 {
578 /*
579 * Restore saved modes.
580 */
581 s = save_term;
582 }
583 _ss_opt(tty, &s);
584 }
585 #else
586 /* MS-DOS, Windows, or OS2 */
587 #if OS2
588 /* OS2 */
589 LSIGNAL(SIGINT, SIG_IGN);
590 #endif
591 erase_char = '\b';
592 #if MSDOS_COMPILER==DJGPPC
593 kill_char = CONTROL('U');
594 /*
595 * So that when we shell out or run another program, its
596 * stdin is in cooked mode. We do not switch stdin to binary
597 * mode if fd0 is zero, since that means we were called before
598 * tty was reopened in open_getchr, in which case we would be
599 * changing the original stdin device outside less.
600 */
601 if (fd0 != 0)
602 setmode(0, on ? O_BINARY : O_TEXT);
603 #else
604 kill_char = ESC;
605 #endif
606 werase_char = CONTROL('W');
607 #endif
608 #endif
609 #endif
610 #endif
611 curr_on = on;
612 }
613
614 #if !MSDOS_COMPILER
615 /*
616 * Some glue to prevent calling termcap functions if tgetent() failed.
617 */
618 static int hardcopy;
619
620 static char *
621 ltget_env(capname)
622 char *capname;
623 {
624 char name[16];
625 char *s;
626
627 s = lgetenv("LESS_TERMCAP_DEBUG");
628 if (s != NULL && *s != '\0')
629 {
630 struct env { struct env *next; char *name; char *value; };
631 static struct env *envs = NULL;
632 struct env *p;
633 for (p = envs; p != NULL; p = p->next)
634 if (strcmp(p->name, capname) == 0)
635 return p->value;
636 p = (struct env *) ecalloc(1, sizeof(struct env));
637 p->name = save(capname);
638 p->value = (char *) ecalloc(strlen(capname)+3, sizeof(char));
639 sprintf(p->value, "<%s>", capname);
640 p->next = envs;
641 envs = p;
642 return p->value;
643 }
644 strcpy(name, "LESS_TERMCAP_");
645 strcat(name, capname);
646 return (lgetenv(name));
647 }
648
649 static int
650 ltgetflag(capname)
651 char *capname;
652 {
653 char *s;
654
655 if ((s = ltget_env(capname)) != NULL)
656 return (*s != '\0' && *s != '0');
657 if (hardcopy)
658 return (0);
659 return (tgetflag(capname));
660 }
661
662 static int
663 ltgetnum(capname)
664 char *capname;
665 {
666 char *s;
667
668 if ((s = ltget_env(capname)) != NULL)
669 return (atoi(s));
670 if (hardcopy)
671 return (-1);
672 return (tgetnum(capname));
673 }
674
675 static char *
676 ltgetstr(capname, pp)
677 char *capname;
678 char **pp;
679 {
680 char *s;
681
682 if ((s = ltget_env(capname)) != NULL)
683 return (s);
684 if (hardcopy)
685 return (NULL);
686 return (tgetstr(capname, pp));
687 }
688 #endif /* MSDOS_COMPILER */
689
690 /*
691 * Get size of the output screen.
692 */
693 public void
694 scrsize()
695 {
696 register char *s;
697 int sys_height;
698 int sys_width;
699 #if !MSDOS_COMPILER
700 int n;
701 #endif
702
703 #define DEF_SC_WIDTH 80
704 #if MSDOS_COMPILER
705 #define DEF_SC_HEIGHT 25
706 #else
707 #define DEF_SC_HEIGHT 24
708 #endif
709
710
711 sys_width = sys_height = 0;
712
713 #if MSDOS_COMPILER==MSOFTC
714 {
715 struct videoconfig w;
716 _getvideoconfig(&w);
717 sys_height = w.numtextrows;
718 sys_width = w.numtextcols;
719 }
720 #else
721 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
722 {
723 struct text_info w;
724 gettextinfo(&w);
725 sys_height = w.screenheight;
726 sys_width = w.screenwidth;
727 }
728 #else
729 #if MSDOS_COMPILER==WIN32C
730 {
731 CONSOLE_SCREEN_BUFFER_INFO scr;
732 GetConsoleScreenBufferInfo(con_out, &scr);
733 sys_height = scr.srWindow.Bottom - scr.srWindow.Top + 1;
734 sys_width = scr.srWindow.Right - scr.srWindow.Left + 1;
735 }
736 #else
737 #if OS2
738 {
739 int s[2];
740 _scrsize(s);
741 sys_width = s[0];
742 sys_height = s[1];
743 /*
744 * When using terminal emulators for XFree86/OS2, the
745 * _scrsize function does not work well.
746 * Call the scrsize.exe program to get the window size.
747 */
748 windowid = getenv("WINDOWID");
749 if (windowid != NULL)
750 {
751 FILE *fd = popen("scrsize", "rt");
752 if (fd != NULL)
753 {
754 int w, h;
755 fscanf(fd, "%i %i", &w, &h);
756 if (w > 0 && h > 0)
757 {
758 sys_width = w;
759 sys_height = h;
760 }
761 pclose(fd);
762 }
763 }
764 }
765 #else
766 #ifdef TIOCGWINSZ
767 {
768 struct winsize w;
769 if (ioctl(2, TIOCGWINSZ, &w) == 0)
770 {
771 if (w.ws_row > 0)
772 sys_height = w.ws_row;
773 if (w.ws_col > 0)
774 sys_width = w.ws_col;
775 }
776 }
777 #else
778 #ifdef WIOCGETD
779 {
780 struct uwdata w;
781 if (ioctl(2, WIOCGETD, &w) == 0)
782 {
783 if (w.uw_height > 0)
784 sys_height = w.uw_height / w.uw_vs;
785 if (w.uw_width > 0)
786 sys_width = w.uw_width / w.uw_hs;
787 }
788 }
789 #endif
790 #endif
791 #endif
792 #endif
793 #endif
794 #endif
795
796 if (sys_height > 0)
797 sc_height = sys_height;
798 else if ((s = lgetenv("LINES")) != NULL)
799 sc_height = atoi(s);
800 #if !MSDOS_COMPILER
801 else if ((n = ltgetnum("li")) > 0)
802 sc_height = n;
803 #endif
804 if (sc_height <= 0)
805 sc_height = DEF_SC_HEIGHT;
806
807 if (sys_width > 0)
808 sc_width = sys_width;
809 else if ((s = lgetenv("COLUMNS")) != NULL)
810 sc_width = atoi(s);
811 #if !MSDOS_COMPILER
812 else if ((n = ltgetnum("co")) > 0)
813 sc_width = n;
814 #endif
815 if (sc_width <= 0)
816 sc_width = DEF_SC_WIDTH;
817 }
818
819 #if MSDOS_COMPILER==MSOFTC
820 /*
821 * Figure out how many empty loops it takes to delay a millisecond.
822 */
823 static void
824 get_clock()
825 {
826 clock_t start;
827
828 /*
829 * Get synchronized at the start of a tick.
830 */
831 start = clock();
832 while (clock() == start)
833 ;
834 /*
835 * Now count loops till the next tick.
836 */
837 start = clock();
838 msec_loops = 0;
839 while (clock() == start)
840 msec_loops++;
841 /*
842 * Convert from (loops per clock) to (loops per millisecond).
843 */
844 msec_loops *= CLOCKS_PER_SEC;
845 msec_loops /= 1000;
846 }
847
848 /*
849 * Delay for a specified number of milliseconds.
850 */
851 static void
852 dummy_func()
853 {
854 static long delay_dummy = 0;
855 delay_dummy++;
856 }
857
858 static void
859 delay(msec)
860 int msec;
861 {
862 long i;
863
864 while (msec-- > 0)
865 {
866 for (i = 0; i < msec_loops; i++)
867 {
868 /*
869 * Make it look like we're doing something here,
870 * so the optimizer doesn't remove the whole loop.
871 */
872 dummy_func();
873 }
874 }
875 }
876 #endif
877
878 /*
879 * Return the characters actually input by a "special" key.
880 */
881 public char *
882 special_key_str(key)
883 int key;
884 {
885 static char tbuf[40];
886 char *s;
887 #if MSDOS_COMPILER || OS2
888 static char k_right[] = { '\340', PCK_RIGHT, 0 };
889 static char k_left[] = { '\340', PCK_LEFT, 0 };
890 static char k_ctl_right[] = { '\340', PCK_CTL_RIGHT, 0 };
891 static char k_ctl_left[] = { '\340', PCK_CTL_LEFT, 0 };
892 static char k_insert[] = { '\340', PCK_INSERT, 0 };
893 static char k_delete[] = { '\340', PCK_DELETE, 0 };
894 static char k_ctl_delete[] = { '\340', PCK_CTL_DELETE, 0 };
895 static char k_ctl_backspace[] = { '\177', 0 };
896 static char k_home[] = { '\340', PCK_HOME, 0 };
897 static char k_end[] = { '\340', PCK_END, 0 };
898 static char k_up[] = { '\340', PCK_UP, 0 };
899 static char k_down[] = { '\340', PCK_DOWN, 0 };
900 static char k_backtab[] = { '\340', PCK_SHIFT_TAB, 0 };
901 static char k_pagedown[] = { '\340', PCK_PAGEDOWN, 0 };
902 static char k_pageup[] = { '\340', PCK_PAGEUP, 0 };
903 static char k_f1[] = { '\340', PCK_F1, 0 };
904 #endif
905 #if !MSDOS_COMPILER
906 char *sp = tbuf;
907 #endif
908
909 switch (key)
910 {
911 #if OS2
912 /*
913 * If windowid is not NULL, assume less is executed in
914 * the XFree86 environment.
915 */
916 case SK_RIGHT_ARROW:
917 s = windowid ? ltgetstr("kr", &sp) : k_right;
918 break;
919 case SK_LEFT_ARROW:
920 s = windowid ? ltgetstr("kl", &sp) : k_left;
921 break;
922 case SK_UP_ARROW:
923 s = windowid ? ltgetstr("ku", &sp) : k_up;
924 break;
925 case SK_DOWN_ARROW:
926 s = windowid ? ltgetstr("kd", &sp) : k_down;
927 break;
928 case SK_PAGE_UP:
929 s = windowid ? ltgetstr("kP", &sp) : k_pageup;
930 break;
931 case SK_PAGE_DOWN:
932 s = windowid ? ltgetstr("kN", &sp) : k_pagedown;
933 break;
934 case SK_HOME:
935 s = windowid ? ltgetstr("kh", &sp) : k_home;
936 break;
937 case SK_END:
938 s = windowid ? ltgetstr("@7", &sp) : k_end;
939 break;
940 case SK_DELETE:
941 if (windowid)
942 {
943 s = ltgetstr("kD", &sp);
944 if (s == NULL)
945 {
946 tbuf[0] = '\177';
947 tbuf[1] = '\0';
948 s = tbuf;
949 }
950 } else
951 s = k_delete;
952 break;
953 #endif
954 #if MSDOS_COMPILER
955 case SK_RIGHT_ARROW:
956 s = k_right;
957 break;
958 case SK_LEFT_ARROW:
959 s = k_left;
960 break;
961 case SK_UP_ARROW:
962 s = k_up;
963 break;
964 case SK_DOWN_ARROW:
965 s = k_down;
966 break;
967 case SK_PAGE_UP:
968 s = k_pageup;
969 break;
970 case SK_PAGE_DOWN:
971 s = k_pagedown;
972 break;
973 case SK_HOME:
974 s = k_home;
975 break;
976 case SK_END:
977 s = k_end;
978 break;
979 case SK_DELETE:
980 s = k_delete;
981 break;
982 #endif
983 #if MSDOS_COMPILER || OS2
984 case SK_INSERT:
985 s = k_insert;
986 break;
987 case SK_CTL_LEFT_ARROW:
988 s = k_ctl_left;
989 break;
990 case SK_CTL_RIGHT_ARROW:
991 s = k_ctl_right;
992 break;
993 case SK_CTL_BACKSPACE:
994 s = k_ctl_backspace;
995 break;
996 case SK_CTL_DELETE:
997 s = k_ctl_delete;
998 break;
999 case SK_F1:
1000 s = k_f1;
1001 break;
1002 case SK_BACKTAB:
1003 s = k_backtab;
1004 break;
1005 #else
1006 case SK_RIGHT_ARROW:
1007 s = ltgetstr("kr", &sp);
1008 break;
1009 case SK_LEFT_ARROW:
1010 s = ltgetstr("kl", &sp);
1011 break;
1012 case SK_UP_ARROW:
1013 s = ltgetstr("ku", &sp);
1014 break;
1015 case SK_DOWN_ARROW:
1016 s = ltgetstr("kd", &sp);
1017 break;
1018 case SK_PAGE_UP:
1019 s = ltgetstr("kP", &sp);
1020 break;
1021 case SK_PAGE_DOWN:
1022 s = ltgetstr("kN", &sp);
1023 break;
1024 case SK_HOME:
1025 s = ltgetstr("kh", &sp);
1026 break;
1027 case SK_END:
1028 s = ltgetstr("@7", &sp);
1029 break;
1030 case SK_DELETE:
1031 s = ltgetstr("kD", &sp);
1032 if (s == NULL)
1033 {
1034 tbuf[0] = '\177';
1035 tbuf[1] = '\0';
1036 s = tbuf;
1037 }
1038 break;
1039 #endif
1040 case SK_CONTROL_K:
1041 tbuf[0] = CONTROL('K');
1042 tbuf[1] = '\0';
1043 s = tbuf;
1044 break;
1045 default:
1046 return (NULL);
1047 }
1048 return (s);
1049 }
1050
1051 /*
1052 * Get terminal capabilities via termcap.
1053 */
1054 public void
1055 get_term()
1056 {
1057 #if MSDOS_COMPILER
1058 auto_wrap = 1;
1059 ignaw = 0;
1060 can_goto_line = 1;
1061 clear_bg = 1;
1062 /*
1063 * Set up default colors.
1064 * The xx_s_width and xx_e_width vars are already initialized to 0.
1065 */
1066 #if MSDOS_COMPILER==MSOFTC
1067 sy_bg_color = _getbkcolor();
1068 sy_fg_color = _gettextcolor();
1069 get_clock();
1070 #else
1071 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1072 {
1073 struct text_info w;
1074 gettextinfo(&w);
1075 sy_bg_color = (w.attribute >> 4) & 0x0F;
1076 sy_fg_color = (w.attribute >> 0) & 0x0F;
1077 }
1078 #else
1079 #if MSDOS_COMPILER==WIN32C
1080 {
1081 DWORD nread;
1082 CONSOLE_SCREEN_BUFFER_INFO scr;
1083
1084 con_out_save = con_out = GetStdHandle(STD_OUTPUT_HANDLE);
1085 /*
1086 * Always open stdin in binary. Note this *must* be done
1087 * before any file operations have been done on fd0.
1088 */
1089 SET_BINARY(0);
1090 GetConsoleScreenBufferInfo(con_out, &scr);
1091 ReadConsoleOutputAttribute(con_out, &curr_attr,
1092 1, scr.dwCursorPosition, &nread);
1093 sy_bg_color = (curr_attr & BG_COLORS) >> 4; /* normalize */
1094 sy_fg_color = curr_attr & FG_COLORS;
1095 }
1096 #endif
1097 #endif
1098 #endif
1099 nm_fg_color = sy_fg_color;
1100 nm_bg_color = sy_bg_color;
1101 bo_fg_color = 11;
1102 bo_bg_color = 0;
1103 ul_fg_color = 9;
1104 ul_bg_color = 0;
1105 so_fg_color = 15;
1106 so_bg_color = 9;
1107 bl_fg_color = 15;
1108 bl_bg_color = 0;
1109
1110 /*
1111 * Get size of the screen.
1112 */
1113 scrsize();
1114 pos_init();
1115
1116
1117 #else /* !MSDOS_COMPILER */
1118
1119 char *sp;
1120 register char *t1, *t2;
1121 char *term;
1122 char termbuf[TERMBUF_SIZE];
1123
1124 static char sbuf[TERMSBUF_SIZE];
1125
1126 #if OS2
1127 /*
1128 * Make sure the termcap database is available.
1129 */
1130 sp = lgetenv("TERMCAP");
1131 if (sp == NULL || *sp == '\0')
1132 {
1133 char *termcap;
1134 if ((sp = homefile("termcap.dat")) != NULL)
1135 {
1136 termcap = (char *) ecalloc(strlen(sp)+9, sizeof(char));
1137 sprintf(termcap, "TERMCAP=%s", sp);
1138 free(sp);
1139 putenv(termcap);
1140 }
1141 }
1142 #endif
1143 /*
1144 * Find out what kind of terminal this is.
1145 */
1146 if ((term = lgetenv("TERM")) == NULL)
1147 term = DEFAULT_TERM;
1148 hardcopy = 0;
1149 if (tgetent(termbuf, term) != TGETENT_OK)
1150 hardcopy = 1;
1151 if (ltgetflag("hc"))
1152 hardcopy = 1;
1153
1154 /*
1155 * Get size of the screen.
1156 */
1157 scrsize();
1158 pos_init();
1159
1160 auto_wrap = ltgetflag("am");
1161 ignaw = ltgetflag("xn");
1162 above_mem = ltgetflag("da");
1163 below_mem = ltgetflag("db");
1164 clear_bg = ltgetflag("ut");
1165
1166 /*
1167 * Assumes termcap variable "sg" is the printing width of:
1168 * the standout sequence, the end standout sequence,
1169 * the underline sequence, the end underline sequence,
1170 * the boldface sequence, and the end boldface sequence.
1171 */
1172 if ((so_s_width = ltgetnum("sg")) < 0)
1173 so_s_width = 0;
1174 so_e_width = so_s_width;
1175
1176 bo_s_width = bo_e_width = so_s_width;
1177 ul_s_width = ul_e_width = so_s_width;
1178 bl_s_width = bl_e_width = so_s_width;
1179
1180 #if HILITE_SEARCH
1181 if (so_s_width > 0 || so_e_width > 0)
1182 /*
1183 * Disable highlighting by default on magic cookie terminals.
1184 * Turning on highlighting might change the displayed width
1185 * of a line, causing the display to get messed up.
1186 * The user can turn it back on with -g,
1187 * but she won't like the results.
1188 */
1189 hilite_search = 0;
1190 #endif
1191
1192 /*
1193 * Get various string-valued capabilities.
1194 */
1195 sp = sbuf;
1196
1197 #if HAVE_OSPEED
1198 sc_pad = ltgetstr("pc", &sp);
1199 if (sc_pad != NULL)
1200 PC = *sc_pad;
1201 #endif
1202
1203 sc_s_keypad = ltgetstr("ks", &sp);
1204 if (sc_s_keypad == NULL)
1205 sc_s_keypad = "";
1206 sc_e_keypad = ltgetstr("ke", &sp);
1207 if (sc_e_keypad == NULL)
1208 sc_e_keypad = "";
1209
1210 sc_init = ltgetstr("ti", &sp);
1211 if (sc_init == NULL)
1212 sc_init = "";
1213
1214 sc_deinit= ltgetstr("te", &sp);
1215 if (sc_deinit == NULL)
1216 sc_deinit = "";
1217
1218 sc_eol_clear = ltgetstr("ce", &sp);
1219 if (sc_eol_clear == NULL || *sc_eol_clear == '\0')
1220 {
1221 missing_cap = 1;
1222 sc_eol_clear = "";
1223 }
1224
1225 sc_eos_clear = ltgetstr("cd", &sp);
1226 if (below_mem && (sc_eos_clear == NULL || *sc_eos_clear == '\0'))
1227 {
1228 missing_cap = 1;
1229 sc_eos_clear = "";
1230 }
1231
1232 sc_clear = ltgetstr("cl", &sp);
1233 if (sc_clear == NULL || *sc_clear == '\0')
1234 {
1235 missing_cap = 1;
1236 sc_clear = "\n\n";
1237 }
1238
1239 sc_move = ltgetstr("cm", &sp);
1240 if (sc_move == NULL || *sc_move == '\0')
1241 {
1242 /*
1243 * This is not an error here, because we don't
1244 * always need sc_move.
1245 * We need it only if we don't have home or lower-left.
1246 */
1247 sc_move = "";
1248 can_goto_line = 0;
1249 } else
1250 can_goto_line = 1;
1251
1252 tmodes("so", "se", &sc_s_in, &sc_s_out, "", "", &sp);
1253 tmodes("us", "ue", &sc_u_in, &sc_u_out, sc_s_in, sc_s_out, &sp);
1254 tmodes("md", "me", &sc_b_in, &sc_b_out, sc_s_in, sc_s_out, &sp);
1255 tmodes("mb", "me", &sc_bl_in, &sc_bl_out, sc_s_in, sc_s_out, &sp);
1256
1257 sc_visual_bell = ltgetstr("vb", &sp);
1258 if (sc_visual_bell == NULL)
1259 sc_visual_bell = "";
1260
1261 if (ltgetflag("bs"))
1262 sc_backspace = "\b";
1263 else
1264 {
1265 sc_backspace = ltgetstr("bc", &sp);
1266 if (sc_backspace == NULL || *sc_backspace == '\0')
1267 sc_backspace = "\b";
1268 }
1269
1270 /*
1271 * Choose between using "ho" and "cm" ("home" and "cursor move")
1272 * to move the cursor to the upper left corner of the screen.
1273 */
1274 t1 = ltgetstr("ho", &sp);
1275 if (t1 == NULL)
1276 t1 = "";
1277 if (*sc_move == '\0')
1278 t2 = "";
1279 else
1280 {
1281 strcpy(sp, tgoto(sc_move, 0, 0));
1282 t2 = sp;
1283 sp += strlen(sp) + 1;
1284 }
1285 sc_home = cheaper(t1, t2, "|\b^");
1286
1287 /*
1288 * Choose between using "ll" and "cm" ("lower left" and "cursor move")
1289 * to move the cursor to the lower left corner of the screen.
1290 */
1291 t1 = ltgetstr("ll", &sp);
1292 if (t1 == NULL)
1293 t1 = "";
1294 if (*sc_move == '\0')
1295 t2 = "";
1296 else
1297 {
1298 strcpy(sp, tgoto(sc_move, 0, sc_height-1));
1299 t2 = sp;
1300 sp += strlen(sp) + 1;
1301 }
1302 sc_lower_left = cheaper(t1, t2, "\r");
1303
1304 /*
1305 * Get carriage return string.
1306 */
1307 sc_return = ltgetstr("cr", &sp);
1308 if (sc_return == NULL)
1309 sc_return = "\r";
1310
1311 /*
1312 * Choose between using "al" or "sr" ("add line" or "scroll reverse")
1313 * to add a line at the top of the screen.
1314 */
1315 t1 = ltgetstr("al", &sp);
1316 if (t1 == NULL)
1317 t1 = "";
1318 t2 = ltgetstr("sr", &sp);
1319 if (t2 == NULL)
1320 t2 = "";
1321 #if OS2
1322 if (*t1 == '\0' && *t2 == '\0')
1323 sc_addline = "";
1324 else
1325 #endif
1326 if (above_mem)
1327 sc_addline = t1;
1328 else
1329 sc_addline = cheaper(t1, t2, "");
1330 if (*sc_addline == '\0')
1331 {
1332 /*
1333 * Force repaint on any backward movement.
1334 */
1335 no_back_scroll = 1;
1336 }
1337 #endif /* MSDOS_COMPILER */
1338 }
1339
1340 #if !MSDOS_COMPILER
1341 /*
1342 * Return the cost of displaying a termcap string.
1343 * We use the trick of calling tputs, but as a char printing function
1344 * we give it inc_costcount, which just increments "costcount".
1345 * This tells us how many chars would be printed by using this string.
1346 * {{ Couldn't we just use strlen? }}
1347 */
1348 static int costcount;
1349
1350 /*ARGSUSED*/
1351 static int
1352 inc_costcount(c)
1353 int c;
1354 {
1355 costcount++;
1356 return (c);
1357 }
1358
1359 static int
1360 cost(t)
1361 char *t;
1362 {
1363 costcount = 0;
1364 tputs(t, sc_height, inc_costcount);
1365 return (costcount);
1366 }
1367
1368 /*
1369 * Return the "best" of the two given termcap strings.
1370 * The best, if both exist, is the one with the lower
1371 * cost (see cost() function).
1372 */
1373 static char *
1374 cheaper(t1, t2, def)
1375 char *t1, *t2;
1376 char *def;
1377 {
1378 if (*t1 == '\0' && *t2 == '\0')
1379 {
1380 missing_cap = 1;
1381 return (def);
1382 }
1383 if (*t1 == '\0')
1384 return (t2);
1385 if (*t2 == '\0')
1386 return (t1);
1387 if (cost(t1) < cost(t2))
1388 return (t1);
1389 return (t2);
1390 }
1391
1392 static void
1393 tmodes(incap, outcap, instr, outstr, def_instr, def_outstr, spp)
1394 char *incap;
1395 char *outcap;
1396 char **instr;
1397 char **outstr;
1398 char *def_instr;
1399 char *def_outstr;
1400 char **spp;
1401 {
1402 *instr = ltgetstr(incap, spp);
1403 if (*instr == NULL)
1404 {
1405 /* Use defaults. */
1406 *instr = def_instr;
1407 *outstr = def_outstr;
1408 return;
1409 }
1410
1411 *outstr = ltgetstr(outcap, spp);
1412 if (*outstr == NULL)
1413 /* No specific out capability; use "me". */
1414 *outstr = ltgetstr("me", spp);
1415 if (*outstr == NULL)
1416 /* Don't even have "me"; use a null string. */
1417 *outstr = "";
1418 }
1419
1420 #endif /* MSDOS_COMPILER */
1421
1422
1423 /*
1424 * Below are the functions which perform all the
1425 * terminal-specific screen manipulation.
1426 */
1427
1428
1429 #if MSDOS_COMPILER
1430
1431 #if MSDOS_COMPILER==WIN32C
1432 static void
1433 _settextposition(int row, int col)
1434 {
1435 COORD cpos;
1436 CONSOLE_SCREEN_BUFFER_INFO csbi;
1437
1438 GetConsoleScreenBufferInfo(con_out, &csbi);
1439 cpos.X = csbi.srWindow.Left + (col - 1);
1440 cpos.Y = csbi.srWindow.Top + (row - 1);
1441 SetConsoleCursorPosition(con_out, cpos);
1442 }
1443 #endif
1444
1445 /*
1446 * Initialize the screen to the correct color at startup.
1447 */
1448 static void
1449 initcolor()
1450 {
1451 SETCOLORS(nm_fg_color, nm_bg_color);
1452 #if 0
1453 /*
1454 * This clears the screen at startup. This is different from
1455 * the behavior of other versions of less. Disable it for now.
1456 */
1457 char *blanks;
1458 int row;
1459 int col;
1460
1461 /*
1462 * Create a complete, blank screen using "normal" colors.
1463 */
1464 SETCOLORS(nm_fg_color, nm_bg_color);
1465 blanks = (char *) ecalloc(width+1, sizeof(char));
1466 for (col = 0; col < sc_width; col++)
1467 blanks[col] = ' ';
1468 blanks[sc_width] = '\0';
1469 for (row = 0; row < sc_height; row++)
1470 _outtext(blanks);
1471 free(blanks);
1472 #endif
1473 }
1474 #endif
1475
1476 #if MSDOS_COMPILER==WIN32C
1477
1478 /*
1479 * Termcap-like init with a private win32 console.
1480 */
1481 static void
1482 win32_init_term()
1483 {
1484 CONSOLE_SCREEN_BUFFER_INFO scr;
1485 COORD size;
1486
1487 if (con_out_save == INVALID_HANDLE_VALUE)
1488 return;
1489
1490 GetConsoleScreenBufferInfo(con_out_save, &scr);
1491
1492 if (con_out_ours == INVALID_HANDLE_VALUE)
1493 {
1494 /*
1495 * Create our own screen buffer, so that we
1496 * may restore the original when done.
1497 */
1498 con_out_ours = CreateConsoleScreenBuffer(
1499 GENERIC_WRITE | GENERIC_READ,
1500 FILE_SHARE_WRITE | FILE_SHARE_READ,
1501 (LPSECURITY_ATTRIBUTES) NULL,
1502 CONSOLE_TEXTMODE_BUFFER,
1503 (LPVOID) NULL);
1504 }
1505
1506 size.X = scr.srWindow.Right - scr.srWindow.Left + 1;
1507 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1;
1508 SetConsoleScreenBufferSize(con_out_ours, size);
1509 SetConsoleActiveScreenBuffer(con_out_ours);
1510 con_out = con_out_ours;
1511 }
1512
1513 /*
1514 * Restore the startup console.
1515 */
1516 static void
1517 win32_deinit_term()
1518 {
1519 if (con_out_save == INVALID_HANDLE_VALUE)
1520 return;
1521 if (quitting)
1522 (void) CloseHandle(con_out_ours);
1523 SetConsoleActiveScreenBuffer(con_out_save);
1524 con_out = con_out_save;
1525 }
1526
1527 #endif
1528
1529 /*
1530 * Initialize terminal
1531 */
1532 public void
1533 init()
1534 {
1535 #if !MSDOS_COMPILER
1536 if (!no_init)
1537 tputs(sc_init, sc_height, putchr);
1538 if (!no_keypad)
1539 tputs(sc_s_keypad, sc_height, putchr);
1540 if (top_scroll)
1541 {
1542 int i;
1543
1544 /*
1545 * This is nice to terminals with no alternate screen,
1546 * but with saved scrolled-off-the-top lines. This way,
1547 * no previous line is lost, but we start with a whole
1548 * screen to ourself.
1549 */
1550 for (i = 1; i < sc_height; i++)
1551 putchr('\n');
1552 } else
1553 line_left();
1554 #else
1555 #if MSDOS_COMPILER==WIN32C
1556 if (!no_init)
1557 win32_init_term();
1558 #endif
1559 initcolor();
1560 flush();
1561 #endif
1562 init_done = 1;
1563 }
1564
1565 /*
1566 * Deinitialize terminal
1567 */
1568 public void
1569 deinit()
1570 {
1571 if (!init_done)
1572 return;
1573 #if !MSDOS_COMPILER
1574 if (!no_keypad)
1575 tputs(sc_e_keypad, sc_height, putchr);
1576 if (!no_init)
1577 tputs(sc_deinit, sc_height, putchr);
1578 #else
1579 /* Restore system colors. */
1580 SETCOLORS(sy_fg_color, sy_bg_color);
1581 #if MSDOS_COMPILER==WIN32C
1582 if (!no_init)
1583 win32_deinit_term();
1584 #else
1585 /* Need clreol to make SETCOLORS take effect. */
1586 clreol();
1587 #endif
1588 #endif
1589 init_done = 0;
1590 }
1591
1592 /*
1593 * Home cursor (move to upper left corner of screen).
1594 */
1595 public void
1596 home()
1597 {
1598 #if !MSDOS_COMPILER
1599 tputs(sc_home, 1, putchr);
1600 #else
1601 flush();
1602 _settextposition(1,1);
1603 #endif
1604 }
1605
1606 /*
1607 * Add a blank line (called with cursor at home).
1608 * Should scroll the display down.
1609 */
1610 public void
1611 add_line()
1612 {
1613 #if !MSDOS_COMPILER
1614 tputs(sc_addline, sc_height, putchr);
1615 #else
1616 flush();
1617 #if MSDOS_COMPILER==MSOFTC
1618 _scrolltextwindow(_GSCROLLDOWN);
1619 _settextposition(1,1);
1620 #else
1621 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1622 movetext(1,1, sc_width,sc_height-1, 1,2);
1623 gotoxy(1,1);
1624 clreol();
1625 #else
1626 #if MSDOS_COMPILER==WIN32C
1627 {
1628 CHAR_INFO fillchar;
1629 SMALL_RECT rcSrc, rcClip;
1630 COORD new_org;
1631 CONSOLE_SCREEN_BUFFER_INFO csbi;
1632
1633 GetConsoleScreenBufferInfo(con_out,&csbi);
1634
1635 /* The clip rectangle is the entire visible screen. */
1636 rcClip.Left = csbi.srWindow.Left;
1637 rcClip.Top = csbi.srWindow.Top;
1638 rcClip.Right = csbi.srWindow.Right;
1639 rcClip.Bottom = csbi.srWindow.Bottom;
1640
1641 /* The source rectangle is the visible screen minus the last line. */
1642 rcSrc = rcClip;
1643 rcSrc.Bottom--;
1644
1645 /* Move the top left corner of the source window down one row. */
1646 new_org.X = rcSrc.Left;
1647 new_org.Y = rcSrc.Top + 1;
1648
1649 /* Fill the right character and attributes. */
1650 fillchar.Char.AsciiChar = ' ';
1651 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
1652 fillchar.Attributes = curr_attr;
1653 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar);
1654 _settextposition(1,1);
1655 }
1656 #endif
1657 #endif
1658 #endif
1659 #endif
1660 }
1661
1662 #if 0
1663 /*
1664 * Remove the n topmost lines and scroll everything below it in the
1665 * window upward. This is needed to stop leaking the topmost line
1666 * into the scrollback buffer when we go down-one-line (in WIN32).
1667 */
1668 public void
1669 remove_top(n)
1670 int n;
1671 {
1672 #if MSDOS_COMPILER==WIN32C
1673 SMALL_RECT rcSrc, rcClip;
1674 CHAR_INFO fillchar;
1675 COORD new_org;
1676 CONSOLE_SCREEN_BUFFER_INFO csbi; /* to get buffer info */
1677
1678 if (n >= sc_height - 1)
1679 {
1680 clear();
1681 home();
1682 return;
1683 }
1684
1685 flush();
1686
1687 GetConsoleScreenBufferInfo(con_out, &csbi);
1688
1689 /* Get the extent of all-visible-rows-but-the-last. */
1690 rcSrc.Left = csbi.srWindow.Left;
1691 rcSrc.Top = csbi.srWindow.Top + n;
1692 rcSrc.Right = csbi.srWindow.Right;
1693 rcSrc.Bottom = csbi.srWindow.Bottom;
1694
1695 /* Get the clip rectangle. */
1696 rcClip.Left = rcSrc.Left;
1697 rcClip.Top = csbi.srWindow.Top;
1698 rcClip.Right = rcSrc.Right;
1699 rcClip.Bottom = rcSrc.Bottom ;
1700
1701 /* Move the source window up n rows. */
1702 new_org.X = rcSrc.Left;
1703 new_org.Y = rcSrc.Top - n;
1704
1705 /* Fill the right character and attributes. */
1706 fillchar.Char.AsciiChar = ' ';
1707 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
1708 fillchar.Attributes = curr_attr;
1709
1710 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar);
1711
1712 /* Position cursor on first blank line. */
1713 goto_line(sc_height - n - 1);
1714 #endif
1715 }
1716 #endif
1717
1718 #if MSDOS_COMPILER==WIN32C
1719 /*
1720 * Clear the screen.
1721 */
1722 static void
1723 win32_clear()
1724 {
1725 /*
1726 * This will clear only the currently visible rows of the NT
1727 * console buffer, which means none of the precious scrollback
1728 * rows are touched making for faster scrolling. Note that, if
1729 * the window has fewer columns than the console buffer (i.e.
1730 * there is a horizontal scrollbar as well), the entire width
1731 * of the visible rows will be cleared.
1732 */
1733 COORD topleft;
1734 DWORD nchars;
1735 DWORD winsz;
1736 CONSOLE_SCREEN_BUFFER_INFO csbi;
1737
1738 /* get the number of cells in the current buffer */
1739 GetConsoleScreenBufferInfo(con_out, &csbi);
1740 winsz = csbi.dwSize.X * (csbi.srWindow.Bottom - csbi.srWindow.Top + 1);
1741 topleft.X = 0;
1742 topleft.Y = csbi.srWindow.Top;
1743
1744 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
1745 FillConsoleOutputCharacter(con_out, ' ', winsz, topleft, &nchars);
1746 FillConsoleOutputAttribute(con_out, curr_attr, winsz, topleft, &nchars);
1747 }
1748
1749 /*
1750 * Remove the n topmost lines and scroll everything below it in the
1751 * window upward.
1752 */
1753 public void
1754 win32_scroll_up(n)
1755 int n;
1756 {
1757 SMALL_RECT rcSrc, rcClip;
1758 CHAR_INFO fillchar;
1759 COORD topleft;
1760 COORD new_org;
1761 DWORD nchars;
1762 DWORD size;
1763 CONSOLE_SCREEN_BUFFER_INFO csbi;
1764
1765 if (n <= 0)
1766 return;
1767
1768 if (n >= sc_height - 1)
1769 {
1770 win32_clear();
1771 _settextposition(1,1);
1772 return;
1773 }
1774
1775 /* Get the extent of what will remain visible after scrolling. */
1776 GetConsoleScreenBufferInfo(con_out, &csbi);
1777 rcSrc.Left = csbi.srWindow.Left;
1778 rcSrc.Top = csbi.srWindow.Top + n;
1779 rcSrc.Right = csbi.srWindow.Right;
1780 rcSrc.Bottom = csbi.srWindow.Bottom;
1781
1782 /* Get the clip rectangle. */
1783 rcClip.Left = rcSrc.Left;
1784 rcClip.Top = csbi.srWindow.Top;
1785 rcClip.Right = rcSrc.Right;
1786 rcClip.Bottom = rcSrc.Bottom ;
1787
1788 /* Move the source text to the top of the screen. */
1789 new_org.X = rcSrc.Left;
1790 new_org.Y = rcClip.Top;
1791
1792 /* Fill the right character and attributes. */
1793 fillchar.Char.AsciiChar = ' ';
1794 fillchar.Attributes = MAKEATTR(nm_fg_color, nm_bg_color);
1795
1796 /* Scroll the window. */
1797 SetConsoleTextAttribute(con_out, fillchar.Attributes);
1798 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar);
1799
1800 /* Clear remaining lines at bottom. */
1801 topleft.X = csbi.dwCursorPosition.X;
1802 topleft.Y = rcSrc.Bottom - n;
1803 size = (n * csbi.dwSize.X) + (rcSrc.Right - topleft.X);
1804 FillConsoleOutputCharacter(con_out, ' ', size, topleft,
1805 &nchars);
1806 FillConsoleOutputAttribute(con_out, fillchar.Attributes, size, topleft,
1807 &nchars);
1808 SetConsoleTextAttribute(con_out, curr_attr);
1809
1810 /* Move cursor n lines up from where it was. */
1811 csbi.dwCursorPosition.Y -= n;
1812 SetConsoleCursorPosition(con_out, csbi.dwCursorPosition);
1813 }
1814 #endif
1815
1816 /*
1817 * Move cursor to lower left corner of screen.
1818 */
1819 public void
1820 lower_left()
1821 {
1822 #if !MSDOS_COMPILER
1823 tputs(sc_lower_left, 1, putchr);
1824 #else
1825 flush();
1826 _settextposition(sc_height, 1);
1827 #endif
1828 }
1829
1830 /*
1831 * Move cursor to left position of current line.
1832 */
1833 public void
1834 line_left()
1835 {
1836 #if !MSDOS_COMPILER
1837 tputs(sc_return, 1, putchr);
1838 #else
1839 int row;
1840 flush();
1841 #if MSDOS_COMPILER==WIN32C
1842 {
1843 CONSOLE_SCREEN_BUFFER_INFO scr;
1844 GetConsoleScreenBufferInfo(con_out, &scr);
1845 row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1;
1846 }
1847 #else
1848 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1849 row = wherey();
1850 #else
1851 {
1852 struct rccoord tpos = _gettextposition();
1853 row = tpos.row;
1854 }
1855 #endif
1856 #endif
1857 _settextposition(row, 1);
1858 #endif
1859 }
1860
1861 /*
1862 * Check if the console size has changed and reset internals
1863 * (in lieu of SIGWINCH for WIN32).
1864 */
1865 public void
1866 check_winch()
1867 {
1868 #if MSDOS_COMPILER==WIN32C
1869 CONSOLE_SCREEN_BUFFER_INFO scr;
1870 COORD size;
1871
1872 if (con_out == INVALID_HANDLE_VALUE)
1873 return;
1874
1875 flush();
1876 GetConsoleScreenBufferInfo(con_out, &scr);
1877 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1;
1878 size.X = scr.srWindow.Right - scr.srWindow.Left + 1;
1879 if (size.Y != sc_height || size.X != sc_width)
1880 {
1881 sc_height = size.Y;
1882 sc_width = size.X;
1883 if (!no_init && con_out_ours == con_out)
1884 SetConsoleScreenBufferSize(con_out, size);
1885 pos_init();
1886 wscroll = (sc_height + 1) / 2;
1887 screen_trashed = 1;
1888 }
1889 #endif
1890 }
1891
1892 /*
1893 * Goto a specific line on the screen.
1894 */
1895 public void
1896 goto_line(slinenum)
1897 int slinenum;
1898 {
1899 #if !MSDOS_COMPILER
1900 tputs(tgoto(sc_move, 0, slinenum), 1, putchr);
1901 #else
1902 flush();
1903 _settextposition(slinenum+1, 1);
1904 #endif
1905 }
1906
1907 #if MSDOS_COMPILER==MSOFTC || MSDOS_COMPILER==BORLANDC
1908 /*
1909 * Create an alternate screen which is all white.
1910 * This screen is used to create a "flash" effect, by displaying it
1911 * briefly and then switching back to the normal screen.
1912 * {{ Yuck! There must be a better way to get a visual bell. }}
1913 */
1914 static void
1915 create_flash()
1916 {
1917 #if MSDOS_COMPILER==MSOFTC
1918 struct videoconfig w;
1919 char *blanks;
1920 int row, col;
1921
1922 _getvideoconfig(&w);
1923 videopages = w.numvideopages;
1924 if (videopages < 2)
1925 {
1926 at_enter(AT_STANDOUT);
1927 at_exit();
1928 } else
1929 {
1930 _setactivepage(1);
1931 at_enter(AT_STANDOUT);
1932 blanks = (char *) ecalloc(w.numtextcols, sizeof(char));
1933 for (col = 0; col < w.numtextcols; col++)
1934 blanks[col] = ' ';
1935 for (row = w.numtextrows; row > 0; row--)
1936 _outmem(blanks, w.numtextcols);
1937 _setactivepage(0);
1938 _setvisualpage(0);
1939 free(blanks);
1940 at_exit();
1941 }
1942 #else
1943 #if MSDOS_COMPILER==BORLANDC
1944 register int n;
1945
1946 whitescreen = (unsigned short *)
1947 malloc(sc_width * sc_height * sizeof(short));
1948 if (whitescreen == NULL)
1949 return;
1950 for (n = 0; n < sc_width * sc_height; n++)
1951 whitescreen[n] = 0x7020;
1952 #else
1953 #if MSDOS_COMPILER==WIN32C
1954 register int n;
1955
1956 whitescreen = (WORD *)
1957 malloc(sc_height * sc_width * sizeof(WORD));
1958 if (whitescreen == NULL)
1959 return;
1960 /* Invert the standard colors. */
1961 for (n = 0; n < sc_width * sc_height; n++)
1962 whitescreen[n] = (WORD)((nm_fg_color << 4) | nm_bg_color);
1963 #endif
1964 #endif
1965 #endif
1966 flash_created = 1;
1967 }
1968 #endif /* MSDOS_COMPILER */
1969
1970 /*
1971 * Output the "visual bell", if there is one.
1972 */
1973 public void
1974 vbell()
1975 {
1976 #if !MSDOS_COMPILER
1977 if (*sc_visual_bell == '\0')
1978 return;
1979 tputs(sc_visual_bell, sc_height, putchr);
1980 #else
1981 #if MSDOS_COMPILER==DJGPPC
1982 ScreenVisualBell();
1983 #else
1984 #if MSDOS_COMPILER==MSOFTC
1985 /*
1986 * Create a flash screen on the second video page.
1987 * Switch to that page, then switch back.
1988 */
1989 if (!flash_created)
1990 create_flash();
1991 if (videopages < 2)
1992 return;
1993 _setvisualpage(1);
1994 delay(100);
1995 _setvisualpage(0);
1996 #else
1997 #if MSDOS_COMPILER==BORLANDC
1998 unsigned short *currscreen;
1999
2000 /*
2001 * Get a copy of the current screen.
2002 * Display the flash screen.
2003 * Then restore the old screen.
2004 */
2005 if (!flash_created)
2006 create_flash();
2007 if (whitescreen == NULL)
2008 return;
2009 currscreen = (unsigned short *)
2010 malloc(sc_width * sc_height * sizeof(short));
2011 if (currscreen == NULL) return;
2012 gettext(1, 1, sc_width, sc_height, currscreen);
2013 puttext(1, 1, sc_width, sc_height, whitescreen);
2014 delay(100);
2015 puttext(1, 1, sc_width, sc_height, currscreen);
2016 free(currscreen);
2017 #else
2018 #if MSDOS_COMPILER==WIN32C
2019 /* paint screen with an inverse color */
2020 clear();
2021
2022 /* leave it displayed for 100 msec. */
2023 Sleep(100);
2024
2025 /* restore with a redraw */
2026 repaint();
2027 #endif
2028 #endif
2029 #endif
2030 #endif
2031 #endif
2032 }
2033
2034 /*
2035 * Make a noise.
2036 */
2037 static void
2038 beep()
2039 {
2040 #if !MSDOS_COMPILER
2041 putchr(CONTROL('G'));
2042 #else
2043 #if MSDOS_COMPILER==WIN32C
2044 MessageBeep(0);
2045 #else
2046 write(1, "\7", 1);
2047 #endif
2048 #endif
2049 }
2050
2051 /*
2052 * Ring the terminal bell.
2053 */
2054 public void
2055 bell()
2056 {
2057 if (quiet == VERY_QUIET)
2058 vbell();
2059 else
2060 beep();
2061 }
2062
2063 /*
2064 * Clear the screen.
2065 */
2066 public void
2067 clear()
2068 {
2069 #if !MSDOS_COMPILER
2070 tputs(sc_clear, sc_height, putchr);
2071 #else
2072 flush();
2073 #if MSDOS_COMPILER==WIN32C
2074 win32_clear();
2075 #else
2076 _clearscreen(_GCLEARSCREEN);
2077 #endif
2078 #endif
2079 }
2080
2081 /*
2082 * Clear from the cursor to the end of the cursor's line.
2083 * {{ This must not move the cursor. }}
2084 */
2085 public void
2086 clear_eol()
2087 {
2088 #if !MSDOS_COMPILER
2089 tputs(sc_eol_clear, 1, putchr);
2090 #else
2091 #if MSDOS_COMPILER==MSOFTC
2092 short top, left;
2093 short bot, right;
2094 struct rccoord tpos;
2095
2096 flush();
2097 /*
2098 * Save current state.
2099 */
2100 tpos = _gettextposition();
2101 _gettextwindow(&top, &left, &bot, &right);
2102 /*
2103 * Set a temporary window to the current line,
2104 * from the cursor's position to the right edge of the screen.
2105 * Then clear that window.
2106 */
2107 _settextwindow(tpos.row, tpos.col, tpos.row, sc_width);
2108 _clearscreen(_GWINDOW);
2109 /*
2110 * Restore state.
2111 */
2112 _settextwindow(top, left, bot, right);
2113 _settextposition(tpos.row, tpos.col);
2114 #else
2115 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
2116 flush();
2117 clreol();
2118 #else
2119 #if MSDOS_COMPILER==WIN32C
2120 DWORD nchars;
2121 COORD cpos;
2122 CONSOLE_SCREEN_BUFFER_INFO scr;
2123
2124 flush();
2125 memset(&scr, 0, sizeof(scr));
2126 GetConsoleScreenBufferInfo(con_out, &scr);
2127 cpos.X = scr.dwCursorPosition.X;
2128 cpos.Y = scr.dwCursorPosition.Y;
2129 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
2130 FillConsoleOutputAttribute(con_out, curr_attr,
2131 scr.dwSize.X - cpos.X, cpos, &nchars);
2132 FillConsoleOutputCharacter(con_out, ' ',
2133 scr.dwSize.X - cpos.X, cpos, &nchars);
2134 #endif
2135 #endif
2136 #endif
2137 #endif
2138 }
2139
2140 /*
2141 * Clear the current line.
2142 * Clear the screen if there's off-screen memory below the display.
2143 */
2144 static void
2145 clear_eol_bot()
2146 {
2147 #if MSDOS_COMPILER
2148 clear_eol();
2149 #else
2150 if (below_mem)
2151 tputs(sc_eos_clear, 1, putchr);
2152 else
2153 tputs(sc_eol_clear, 1, putchr);
2154 #endif
2155 }
2156
2157 /*
2158 * Clear the bottom line of the display.
2159 * Leave the cursor at the beginning of the bottom line.
2160 */
2161 public void
2162 clear_bot()
2163 {
2164 /*
2165 * If we're in a non-normal attribute mode, temporarily exit
2166 * the mode while we do the clear. Some terminals fill the
2167 * cleared area with the current attribute.
2168 */
2169 if (oldbot)
2170 lower_left();
2171 else
2172 line_left();
2173
2174 if (attrmode == AT_NORMAL)
2175 clear_eol_bot();
2176 else
2177 {
2178 int saved_attrmode = attrmode;
2179
2180 at_exit();
2181 clear_eol_bot();
2182 at_enter(saved_attrmode);
2183 }
2184 }
2185
2186 public void
2187 at_enter(attr)
2188 int attr;
2189 {
2190 attr = apply_at_specials(attr);
2191
2192 #if !MSDOS_COMPILER
2193 /* The one with the most priority is last. */
2194 if (attr & AT_UNDERLINE)
2195 tputs(sc_u_in, 1, putchr);
2196 if (attr & AT_BOLD)
2197 tputs(sc_b_in, 1, putchr);
2198 if (attr & AT_BLINK)
2199 tputs(sc_bl_in, 1, putchr);
2200 if (attr & AT_STANDOUT)
2201 tputs(sc_s_in, 1, putchr);
2202 #else
2203 flush();
2204 /* The one with the most priority is first. */
2205 if (attr & AT_STANDOUT)
2206 {
2207 SETCOLORS(so_fg_color, so_bg_color);
2208 } else if (attr & AT_BLINK)
2209 {
2210 SETCOLORS(bl_fg_color, bl_bg_color);
2211 }
2212 else if (attr & AT_BOLD)
2213 {
2214 SETCOLORS(bo_fg_color, bo_bg_color);
2215 }
2216 else if (attr & AT_UNDERLINE)
2217 {
2218 SETCOLORS(ul_fg_color, ul_bg_color);
2219 }
2220 #endif
2221
2222 attrmode = attr;
2223 }
2224
2225 public void
2226 at_exit()
2227 {
2228 #if !MSDOS_COMPILER
2229 /* Undo things in the reverse order we did them. */
2230 if (attrmode & AT_STANDOUT)
2231 tputs(sc_s_out, 1, putchr);
2232 if (attrmode & AT_BLINK)
2233 tputs(sc_bl_out, 1, putchr);
2234 if (attrmode & AT_BOLD)
2235 tputs(sc_b_out, 1, putchr);
2236 if (attrmode & AT_UNDERLINE)
2237 tputs(sc_u_out, 1, putchr);
2238 #else
2239 flush();
2240 SETCOLORS(nm_fg_color, nm_bg_color);
2241 #endif
2242
2243 attrmode = AT_NORMAL;
2244 }
2245
2246 public void
2247 at_switch(attr)
2248 int attr;
2249 {
2250 int new_attrmode = apply_at_specials(attr);
2251 int ignore_modes = AT_ANSI;
2252
2253 if ((new_attrmode & ~ignore_modes) != (attrmode & ~ignore_modes))
2254 {
2255 at_exit();
2256 at_enter(attr);
2257 }
2258 }
2259
2260 public int
2261 is_at_equiv(attr1, attr2)
2262 int attr1;
2263 int attr2;
2264 {
2265 attr1 = apply_at_specials(attr1);
2266 attr2 = apply_at_specials(attr2);
2267
2268 return (attr1 == attr2);
2269 }
2270
2271 public int
2272 apply_at_specials(attr)
2273 int attr;
2274 {
2275 if (attr & AT_BINARY)
2276 attr |= binattr;
2277 if (attr & AT_HILITE)
2278 attr |= AT_STANDOUT;
2279 attr &= ~(AT_BINARY|AT_HILITE);
2280
2281 return attr;
2282 }
2283
2284 #if 0 /* No longer used */
2285 /*
2286 * Erase the character to the left of the cursor
2287 * and move the cursor left.
2288 */
2289 public void
2290 backspace()
2291 {
2292 #if !MSDOS_COMPILER
2293 /*
2294 * Erase the previous character by overstriking with a space.
2295 */
2296 tputs(sc_backspace, 1, putchr);
2297 putchr(' ');
2298 tputs(sc_backspace, 1, putchr);
2299 #else
2300 #if MSDOS_COMPILER==MSOFTC
2301 struct rccoord tpos;
2302
2303 flush();
2304 tpos = _gettextposition();
2305 if (tpos.col <= 1)
2306 return;
2307 _settextposition(tpos.row, tpos.col-1);
2308 _outtext(" ");
2309 _settextposition(tpos.row, tpos.col-1);
2310 #else
2311 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
2312 cputs("\b");
2313 #else
2314 #if MSDOS_COMPILER==WIN32C
2315 COORD cpos;
2316 DWORD cChars;
2317 CONSOLE_SCREEN_BUFFER_INFO scr;
2318
2319 flush();
2320 GetConsoleScreenBufferInfo(con_out, &scr);
2321 cpos = scr.dwCursorPosition;
2322 if (cpos.X <= 0)
2323 return;
2324 cpos.X--;
2325 SetConsoleCursorPosition(con_out, cpos);
2326 FillConsoleOutputCharacter(con_out, (TCHAR)' ', 1, cpos, &cChars);
2327 SetConsoleCursorPosition(con_out, cpos);
2328 #endif
2329 #endif
2330 #endif
2331 #endif
2332 }
2333 #endif /* 0 */
2334
2335 /*
2336 * Output a plain backspace, without erasing the previous char.
2337 */
2338 public void
2339 putbs()
2340 {
2341 #if !MSDOS_COMPILER
2342 tputs(sc_backspace, 1, putchr);
2343 #else
2344 int row, col;
2345
2346 flush();
2347 {
2348 #if MSDOS_COMPILER==MSOFTC
2349 struct rccoord tpos;
2350 tpos = _gettextposition();
2351 row = tpos.row;
2352 col = tpos.col;
2353 #else
2354 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
2355 row = wherey();
2356 col = wherex();
2357 #else
2358 #if MSDOS_COMPILER==WIN32C
2359 CONSOLE_SCREEN_BUFFER_INFO scr;
2360 GetConsoleScreenBufferInfo(con_out, &scr);
2361 row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1;
2362 col = scr.dwCursorPosition.X - scr.srWindow.Left + 1;
2363 #endif
2364 #endif
2365 #endif
2366 }
2367 if (col <= 1)
2368 return;
2369 _settextposition(row, col-1);
2370 #endif /* MSDOS_COMPILER */
2371 }
2372
2373 #if MSDOS_COMPILER==WIN32C
2374 /*
2375 * Determine whether an input character is waiting to be read.
2376 */
2377 static int
2378 win32_kbhit(tty)
2379 HANDLE tty;
2380 {
2381 INPUT_RECORD ip;
2382 DWORD read;
2383
2384 if (keyCount > 0)
2385 return (TRUE);
2386
2387 currentKey.ascii = 0;
2388 currentKey.scan = 0;
2389
2390 /*
2391 * Wait for a real key-down event, but
2392 * ignore SHIFT and CONTROL key events.
2393 */
2394 do
2395 {
2396 PeekConsoleInput(tty, &ip, 1, &read);
2397 if (read == 0)
2398 return (FALSE);
2399 ReadConsoleInput(tty, &ip, 1, &read);
2400 } while (ip.EventType != KEY_EVENT ||
2401 ip.Event.KeyEvent.bKeyDown != TRUE ||
2402 ip.Event.KeyEvent.wVirtualScanCode == 0 ||
2403 ip.Event.KeyEvent.wVirtualKeyCode == VK_SHIFT ||
2404 ip.Event.KeyEvent.wVirtualKeyCode == VK_CONTROL ||
2405 ip.Event.KeyEvent.wVirtualKeyCode == VK_MENU);
2406
2407 currentKey.ascii = ip.Event.KeyEvent.uChar.AsciiChar;
2408 currentKey.scan = ip.Event.KeyEvent.wVirtualScanCode;
2409 keyCount = ip.Event.KeyEvent.wRepeatCount;
2410
2411 if (ip.Event.KeyEvent.dwControlKeyState &
2412 (LEFT_ALT_PRESSED | RIGHT_ALT_PRESSED))
2413 {
2414 switch (currentKey.scan)
2415 {
2416 case PCK_ALT_E: /* letter 'E' */
2417 currentKey.ascii = 0;
2418 break;
2419 }
2420 } else if (ip.Event.KeyEvent.dwControlKeyState &
2421 (LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED))
2422 {
2423 switch (currentKey.scan)
2424 {
2425 case PCK_RIGHT: /* right arrow */
2426 currentKey.scan = PCK_CTL_RIGHT;
2427 break;
2428 case PCK_LEFT: /* left arrow */
2429 currentKey.scan = PCK_CTL_LEFT;
2430 break;
2431 case PCK_DELETE: /* delete */
2432 currentKey.scan = PCK_CTL_DELETE;
2433 break;
2434 }
2435 }
2436 return (TRUE);
2437 }
2438
2439 /*
2440 * Read a character from the keyboard.
2441 */
2442 public char
2443 WIN32getch(tty)
2444 int tty;
2445 {
2446 int ascii;
2447
2448 if (pending_scancode)
2449 {
2450 pending_scancode = 0;
2451 return ((char)(currentKey.scan & 0x00FF));
2452 }
2453
2454 while (win32_kbhit((HANDLE)tty) == FALSE)
2455 {
2456 Sleep(20);
2457 if (ABORT_SIGS())
2458 return ('\003');
2459 continue;
2460 }
2461 keyCount --;
2462 ascii = currentKey.ascii;
2463 /*
2464 * On PC's, the extended keys return a 2 byte sequence beginning
2465 * with '00', so if the ascii code is 00, the next byte will be
2466 * the lsb of the scan code.
2467 */
2468 pending_scancode = (ascii == 0x00);
2469 return ((char)ascii);
2470 }
2471 #endif
2472
2473 #if MSDOS_COMPILER
2474 /*
2475 */
2476 public void
2477 WIN32setcolors(fg, bg)
2478 int fg;
2479 int bg;
2480 {
2481 SETCOLORS(fg, bg);
2482 }
2483
2484 /*
2485 */
2486 public void
2487 WIN32textout(text, len)
2488 char *text;
2489 int len;
2490 {
2491 #if MSDOS_COMPILER==WIN32C
2492 DWORD written;
2493 WriteConsole(con_out, text, len, &written, NULL);
2494 #else
2495 char c = text[len];
2496 text[len] = '\0';
2497 cputs(text);
2498 text[len] = c;
2499 #endif
2500 }
2501 #endif
DragonFly BSD