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Switch LINT to building NATA.
[dragonfly/vkernel-mp.git] / contrib / less-403 / screen.c
blob6c4fc849b50f349cc9be5ec9e25b06bc3fd659fb
1 /*
2 * Copyright (C) 1984-2007 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 about less, or for information on how to
8 * contact the author, see the README file.
9 */
10
11
12 /*
13 * Routines which deal with the characteristics of the terminal.
14 * Uses termcap to be as terminal-independent as possible.
15 */
16
17 #include "less.h"
18 #include "cmd.h"
19
20 #if MSDOS_COMPILER
21 #include "pckeys.h"
22 #if MSDOS_COMPILER==MSOFTC
23 #include <graph.h>
24 #else
25 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
26 #include <conio.h>
27 #if MSDOS_COMPILER==DJGPPC
28 #include <pc.h>
29 extern int fd0;
30 #endif
31 #else
32 #if MSDOS_COMPILER==WIN32C
33 #include <windows.h>
34 #endif
35 #endif
36 #endif
37 #include <time.h>
38
39 #else
40
41 #if HAVE_SYS_IOCTL_H
42 #include <sys/ioctl.h>
43 #endif
44
45 #if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS
46 #include <termios.h>
47 #else
48 #if HAVE_TERMIO_H
49 #include <termio.h>
50 #else
51 #if HAVE_SGSTAT_H
52 #include <sgstat.h>
53 #else
54 #include <sgtty.h>
55 #endif
56 #endif
57 #endif
58
59 #if HAVE_TERMCAP_H
60 #include <termcap.h>
61 #endif
62 #ifdef _OSK
63 #include <signal.h>
64 #endif
65 #if OS2
66 #include <sys/signal.h>
67 #include "pckeys.h"
68 #endif
69 #if HAVE_SYS_STREAM_H
70 #include <sys/stream.h>
71 #endif
72 #if HAVE_SYS_PTEM_H
73 #include <sys/ptem.h>
74 #endif
75
76 #endif /* MSDOS_COMPILER */
77
78 /*
79 * Check for broken termios package that forces you to manually
80 * set the line discipline.
81 */
82 #ifdef __ultrix__
83 #define MUST_SET_LINE_DISCIPLINE 1
84 #else
85 #define MUST_SET_LINE_DISCIPLINE 0
86 #endif
87
88 #if OS2
89 #define DEFAULT_TERM "ansi"
90 static char *windowid;
91 #else
92 #define DEFAULT_TERM "unknown"
93 #endif
94
95 #if MSDOS_COMPILER==MSOFTC
96 static int videopages;
97 static long msec_loops;
98 static int flash_created = 0;
99 #define SETCOLORS(fg,bg) { _settextcolor(fg); _setbkcolor(bg); }
100 #endif
101
102 #if MSDOS_COMPILER==BORLANDC
103 static unsigned short *whitescreen;
104 static int flash_created = 0;
105 #endif
106 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
107 #define _settextposition(y,x) gotoxy(x,y)
108 #define _clearscreen(m) clrscr()
109 #define _outtext(s) cputs(s)
110 #define SETCOLORS(fg,bg) { textcolor(fg); textbackground(bg); }
111 extern int sc_height;
112 #endif
113
114 #if MSDOS_COMPILER==WIN32C
115 struct keyRecord
116 {
117 int ascii;
118 int scan;
119 } currentKey;
120
121 static int keyCount = 0;
122 static WORD curr_attr;
123 static int pending_scancode = 0;
124 static WORD *whitescreen;
125
126 static HANDLE con_out_save = INVALID_HANDLE_VALUE; /* previous console */
127 static HANDLE con_out_ours = INVALID_HANDLE_VALUE; /* our own */
128 HANDLE con_out = INVALID_HANDLE_VALUE; /* current console */
129
130 extern int quitting;
131 static void win32_init_term();
132 static void win32_deinit_term();
133
134 #define FG_COLORS (FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_INTENSITY)
135 #define BG_COLORS (BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE | BACKGROUND_INTENSITY)
136 #define MAKEATTR(fg,bg) ((WORD)((fg)|((bg)<<4)))
137 #define SETCOLORS(fg,bg) { curr_attr = MAKEATTR(fg,bg); \
138 if (SetConsoleTextAttribute(con_out, curr_attr) == 0) \
139 error("SETCOLORS failed"); }
140 #endif
141
142 #if MSDOS_COMPILER
143 public int nm_fg_color; /* Color of normal text */
144 public int nm_bg_color;
145 public int bo_fg_color; /* Color of bold text */
146 public int bo_bg_color;
147 public int ul_fg_color; /* Color of underlined text */
148 public int ul_bg_color;
149 public int so_fg_color; /* Color of standout text */
150 public int so_bg_color;
151 public int bl_fg_color; /* Color of blinking text */
152 public int bl_bg_color;
153 static int sy_fg_color; /* Color of system text (before less) */
154 static int sy_bg_color;
155
156 #else
157
158 /*
159 * Strings passed to tputs() to do various terminal functions.
160 */
161 static char
162 *sc_pad, /* Pad string */
163 *sc_home, /* Cursor home */
164 *sc_addline, /* Add line, scroll down following lines */
165 *sc_lower_left, /* Cursor to last line, first column */
166 *sc_return, /* Cursor to beginning of current line */
167 *sc_move, /* General cursor positioning */
168 *sc_clear, /* Clear screen */
169 *sc_eol_clear, /* Clear to end of line */
170 *sc_eos_clear, /* Clear to end of screen */
171 *sc_s_in, /* Enter standout (highlighted) mode */
172 *sc_s_out, /* Exit standout mode */
173 *sc_u_in, /* Enter underline mode */
174 *sc_u_out, /* Exit underline mode */
175 *sc_b_in, /* Enter bold mode */
176 *sc_b_out, /* Exit bold mode */
177 *sc_bl_in, /* Enter blink mode */
178 *sc_bl_out, /* Exit blink mode */
179 *sc_visual_bell, /* Visual bell (flash screen) sequence */
180 *sc_backspace, /* Backspace cursor */
181 *sc_s_keypad, /* Start keypad mode */
182 *sc_e_keypad, /* End keypad mode */
183 *sc_init, /* Startup terminal initialization */
184 *sc_deinit; /* Exit terminal de-initialization */
185 #endif
186
187 static int init_done = 0;
188
189 public int auto_wrap; /* Terminal does \r\n when write past margin */
190 public int ignaw; /* Terminal ignores \n immediately after wrap */
191 public int erase_char; /* The user's erase char */
192 public int erase2_char; /* The user's other erase char */
193 public int kill_char; /* The user's line-kill char */
194 public int werase_char; /* The user's word-erase char */
195 public int sc_width, sc_height; /* Height & width of screen */
196 public int bo_s_width, bo_e_width; /* Printing width of boldface seq */
197 public int ul_s_width, ul_e_width; /* Printing width of underline seq */
198 public int so_s_width, so_e_width; /* Printing width of standout seq */
199 public int bl_s_width, bl_e_width; /* Printing width of blink seq */
200 public int above_mem, below_mem; /* Memory retained above/below screen */
201 public int can_goto_line; /* Can move cursor to any line */
202 public int clear_bg; /* Clear fills with background color */
203 public int missing_cap = 0; /* Some capability is missing */
204
205 static int attrmode = AT_NORMAL;
206 extern int binattr;
207
208 #if !MSDOS_COMPILER
209 static char *cheaper();
210 static void tmodes();
211 #endif
212
213 /*
214 * These two variables are sometimes defined in,
215 * and needed by, the termcap library.
216 */
217 #if MUST_DEFINE_OSPEED
218 extern short ospeed; /* Terminal output baud rate */
219 extern char PC; /* Pad character */
220 #endif
221 #ifdef _OSK
222 short ospeed;
223 char PC_, *UP, *BC;
224 #endif
225
226 extern int quiet; /* If VERY_QUIET, use visual bell for bell */
227 extern int no_back_scroll;
228 extern int swindow;
229 extern int no_init;
230 extern int no_keypad;
231 extern int sigs;
232 extern int wscroll;
233 extern int screen_trashed;
234 extern int tty;
235 extern int top_scroll;
236 extern int oldbot;
237 #if HILITE_SEARCH
238 extern int hilite_search;
239 #endif
240
241 extern char *tgetstr();
242 extern char *tgoto();
243
244
245 /*
246 * Change terminal to "raw mode", or restore to "normal" mode.
247 * "Raw mode" means
248 * 1. An outstanding read will complete on receipt of a single keystroke.
249 * 2. Input is not echoed.
250 * 3. On output, \n is mapped to \r\n.
251 * 4. \t is NOT expanded into spaces.
252 * 5. Signal-causing characters such as ctrl-C (interrupt),
253 * etc. are NOT disabled.
254 * It doesn't matter whether an input \n is mapped to \r, or vice versa.
255 */
256 public void
257 raw_mode(on)
258 int on;
259 {
260 static int curr_on = 0;
261
262 if (on == curr_on)
263 return;
264 erase2_char = '\b'; /* in case OS doesn't know about erase2 */
265 #if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS
266 {
267 struct termios s;
268 static struct termios save_term;
269 static int saved_term = 0;
270
271 if (on)
272 {
273 /*
274 * Get terminal modes.
275 */
276 tcgetattr(tty, &s);
277
278 /*
279 * Save modes and set certain variables dependent on modes.
280 */
281 if (!saved_term)
282 {
283 save_term = s;
284 saved_term = 1;
285 }
286 #if HAVE_OSPEED
287 switch (cfgetospeed(&s))
288 {
289 #ifdef B0
290 case B0: ospeed = 0; break;
291 #endif
292 #ifdef B50
293 case B50: ospeed = 1; break;
294 #endif
295 #ifdef B75
296 case B75: ospeed = 2; break;
297 #endif
298 #ifdef B110
299 case B110: ospeed = 3; break;
300 #endif
301 #ifdef B134
302 case B134: ospeed = 4; break;
303 #endif
304 #ifdef B150
305 case B150: ospeed = 5; break;
306 #endif
307 #ifdef B200
308 case B200: ospeed = 6; break;
309 #endif
310 #ifdef B300
311 case B300: ospeed = 7; break;
312 #endif
313 #ifdef B600
314 case B600: ospeed = 8; break;
315 #endif
316 #ifdef B1200
317 case B1200: ospeed = 9; break;
318 #endif
319 #ifdef B1800
320 case B1800: ospeed = 10; break;
321 #endif
322 #ifdef B2400
323 case B2400: ospeed = 11; break;
324 #endif
325 #ifdef B4800
326 case B4800: ospeed = 12; break;
327 #endif
328 #ifdef B9600
329 case B9600: ospeed = 13; break;
330 #endif
331 #ifdef EXTA
332 case EXTA: ospeed = 14; break;
333 #endif
334 #ifdef EXTB
335 case EXTB: ospeed = 15; break;
336 #endif
337 #ifdef B57600
338 case B57600: ospeed = 16; break;
339 #endif
340 #ifdef B115200
341 case B115200: ospeed = 17; break;
342 #endif
343 default: ;
344 }
345 #endif
346 erase_char = s.c_cc[VERASE];
347 #ifdef VERASE2
348 erase2_char = s.c_cc[VERASE2];
349 #endif
350 kill_char = s.c_cc[VKILL];
351 #ifdef VWERASE
352 werase_char = s.c_cc[VWERASE];
353 #else
354 werase_char = CONTROL('W');
355 #endif
356
357 /*
358 * Set the modes to the way we want them.
359 */
360 s.c_lflag &= ~(0
361 #ifdef ICANON
362 | ICANON
363 #endif
364 #ifdef ECHO
365 | ECHO
366 #endif
367 #ifdef ECHOE
368 | ECHOE
369 #endif
370 #ifdef ECHOK
371 | ECHOK
372 #endif
373 #if ECHONL
374 | ECHONL
375 #endif
376 );
377
378 s.c_oflag |= (0
379 #ifdef OXTABS
380 | OXTABS
381 #else
382 #ifdef TAB3
383 | TAB3
384 #else
385 #ifdef XTABS
386 | XTABS
387 #endif
388 #endif
389 #endif
390 #ifdef OPOST
391 | OPOST
392 #endif
393 #ifdef ONLCR
394 | ONLCR
395 #endif
396 );
397
398 s.c_oflag &= ~(0
399 #ifdef ONOEOT
400 | ONOEOT
401 #endif
402 #ifdef OCRNL
403 | OCRNL
404 #endif
405 #ifdef ONOCR
406 | ONOCR
407 #endif
408 #ifdef ONLRET
409 | ONLRET
410 #endif
411 );
412 s.c_cc[VMIN] = 1;
413 s.c_cc[VTIME] = 0;
414 #ifdef VLNEXT
415 s.c_cc[VLNEXT] = 0;
416 #endif
417 #ifdef VDSUSP
418 s.c_cc[VDSUSP] = 0;
419 #endif
420 #if MUST_SET_LINE_DISCIPLINE
421 /*
422 * System's termios is broken; need to explicitly
423 * request TERMIODISC line discipline.
424 */
425 s.c_line = TERMIODISC;
426 #endif
427 } else
428 {
429 /*
430 * Restore saved modes.
431 */
432 s = save_term;
433 }
434 #if HAVE_FSYNC
435 fsync(tty);
436 #endif
437 tcsetattr(tty, TCSADRAIN, &s);
438 #if MUST_SET_LINE_DISCIPLINE
439 if (!on)
440 {
441 /*
442 * Broken termios *ignores* any line discipline
443 * except TERMIODISC. A different old line discipline
444 * is therefore not restored, yet. Restore the old
445 * line discipline by hand.
446 */
447 ioctl(tty, TIOCSETD, &save_term.c_line);
448 }
449 #endif
450 }
451 #else
452 #ifdef TCGETA
453 {
454 struct termio s;
455 static struct termio save_term;
456 static int saved_term = 0;
457
458 if (on)
459 {
460 /*
461 * Get terminal modes.
462 */
463 ioctl(tty, TCGETA, &s);
464
465 /*
466 * Save modes and set certain variables dependent on modes.
467 */
468 if (!saved_term)
469 {
470 save_term = s;
471 saved_term = 1;
472 }
473 #if HAVE_OSPEED
474 ospeed = s.c_cflag & CBAUD;
475 #endif
476 erase_char = s.c_cc[VERASE];
477 kill_char = s.c_cc[VKILL];
478 #ifdef VWERASE
479 werase_char = s.c_cc[VWERASE];
480 #else
481 werase_char = CONTROL('W');
482 #endif
483
484 /*
485 * Set the modes to the way we want them.
486 */
487 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL);
488 s.c_oflag |= (OPOST|ONLCR|TAB3);
489 s.c_oflag &= ~(OCRNL|ONOCR|ONLRET);
490 s.c_cc[VMIN] = 1;
491 s.c_cc[VTIME] = 0;
492 } else
493 {
494 /*
495 * Restore saved modes.
496 */
497 s = save_term;
498 }
499 ioctl(tty, TCSETAW, &s);
500 }
501 #else
502 #ifdef TIOCGETP
503 {
504 struct sgttyb s;
505 static struct sgttyb save_term;
506 static int saved_term = 0;
507
508 if (on)
509 {
510 /*
511 * Get terminal modes.
512 */
513 ioctl(tty, TIOCGETP, &s);
514
515 /*
516 * Save modes and set certain variables dependent on modes.
517 */
518 if (!saved_term)
519 {
520 save_term = s;
521 saved_term = 1;
522 }
523 #if HAVE_OSPEED
524 ospeed = s.sg_ospeed;
525 #endif
526 erase_char = s.sg_erase;
527 kill_char = s.sg_kill;
528 werase_char = CONTROL('W');
529
530 /*
531 * Set the modes to the way we want them.
532 */
533 s.sg_flags |= CBREAK;
534 s.sg_flags &= ~(ECHO|XTABS);
535 } else
536 {
537 /*
538 * Restore saved modes.
539 */
540 s = save_term;
541 }
542 ioctl(tty, TIOCSETN, &s);
543 }
544 #else
545 #ifdef _OSK
546 {
547 struct sgbuf s;
548 static struct sgbuf save_term;
549 static int saved_term = 0;
550
551 if (on)
552 {
553 /*
554 * Get terminal modes.
555 */
556 _gs_opt(tty, &s);
557
558 /*
559 * Save modes and set certain variables dependent on modes.
560 */
561 if (!saved_term)
562 {
563 save_term = s;
564 saved_term = 1;
565 }
566 erase_char = s.sg_bspch;
567 kill_char = s.sg_dlnch;
568 werase_char = CONTROL('W');
569
570 /*
571 * Set the modes to the way we want them.
572 */
573 s.sg_echo = 0;
574 s.sg_eofch = 0;
575 s.sg_pause = 0;
576 s.sg_psch = 0;
577 } else
578 {
579 /*
580 * Restore saved modes.
581 */
582 s = save_term;
583 }
584 _ss_opt(tty, &s);
585 }
586 #else
587 /* MS-DOS, Windows, or OS2 */
588 #if OS2
589 /* OS2 */
590 LSIGNAL(SIGINT, SIG_IGN);
591 #endif
592 erase_char = '\b';
593 #if MSDOS_COMPILER==DJGPPC
594 kill_char = CONTROL('U');
595 /*
596 * So that when we shell out or run another program, its
597 * stdin is in cooked mode. We do not switch stdin to binary
598 * mode if fd0 is zero, since that means we were called before
599 * tty was reopened in open_getchr, in which case we would be
600 * changing the original stdin device outside less.
601 */
602 if (fd0 != 0)
603 setmode(0, on ? O_BINARY : O_TEXT);
604 #else
605 kill_char = ESC;
606 #endif
607 werase_char = CONTROL('W');
608 #endif
609 #endif
610 #endif
611 #endif
612 curr_on = on;
613 }
614
615 #if !MSDOS_COMPILER
616 /*
617 * Some glue to prevent calling termcap functions if tgetent() failed.
618 */
619 static int hardcopy;
620
621 static char *
622 ltget_env(capname)
623 char *capname;
624 {
625 char name[16];
626
627 strcpy(name, "LESS_TERMCAP_");
628 strcat(name, capname);
629 return (lgetenv(name));
630 }
631
632 static int
633 ltgetflag(capname)
634 char *capname;
635 {
636 char *s;
637
638 if ((s = ltget_env(capname)) != NULL)
639 return (*s != '\0' && *s != '0');
640 if (hardcopy)
641 return (0);
642 return (tgetflag(capname));
643 }
644
645 static int
646 ltgetnum(capname)
647 char *capname;
648 {
649 char *s;
650
651 if ((s = ltget_env(capname)) != NULL)
652 return (atoi(s));
653 if (hardcopy)
654 return (-1);
655 return (tgetnum(capname));
656 }
657
658 static char *
659 ltgetstr(capname, pp)
660 char *capname;
661 char **pp;
662 {
663 char *s;
664
665 if ((s = ltget_env(capname)) != NULL)
666 return (s);
667 if (hardcopy)
668 return (NULL);
669 return (tgetstr(capname, pp));
670 }
671 #endif /* MSDOS_COMPILER */
672
673 /*
674 * Get size of the output screen.
675 */
676 public void
677 scrsize()
678 {
679 register char *s;
680 int sys_height;
681 int sys_width;
682 #if !MSDOS_COMPILER
683 int n;
684 #endif
685
686 #define DEF_SC_WIDTH 80
687 #if MSDOS_COMPILER
688 #define DEF_SC_HEIGHT 25
689 #else
690 #define DEF_SC_HEIGHT 24
691 #endif
692
693
694 sys_width = sys_height = 0;
695
696 #if MSDOS_COMPILER==MSOFTC
697 {
698 struct videoconfig w;
699 _getvideoconfig(&w);
700 sys_height = w.numtextrows;
701 sys_width = w.numtextcols;
702 }
703 #else
704 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
705 {
706 struct text_info w;
707 gettextinfo(&w);
708 sys_height = w.screenheight;
709 sys_width = w.screenwidth;
710 }
711 #else
712 #if MSDOS_COMPILER==WIN32C
713 {
714 CONSOLE_SCREEN_BUFFER_INFO scr;
715 GetConsoleScreenBufferInfo(con_out, &scr);
716 sys_height = scr.srWindow.Bottom - scr.srWindow.Top + 1;
717 sys_width = scr.srWindow.Right - scr.srWindow.Left + 1;
718 }
719 #else
720 #if OS2
721 {
722 int s[2];
723 _scrsize(s);
724 sys_width = s[0];
725 sys_height = s[1];
726 /*
727 * When using terminal emulators for XFree86/OS2, the
728 * _scrsize function does not work well.
729 * Call the scrsize.exe program to get the window size.
730 */
731 windowid = getenv("WINDOWID");
732 if (windowid != NULL)
733 {
734 FILE *fd = popen("scrsize", "rt");
735 if (fd != NULL)
736 {
737 int w, h;
738 fscanf(fd, "%i %i", &w, &h);
739 if (w > 0 && h > 0)
740 {
741 sys_width = w;
742 sys_height = h;
743 }
744 pclose(fd);
745 }
746 }
747 }
748 #else
749 #ifdef TIOCGWINSZ
750 {
751 struct winsize w;
752 if (ioctl(2, TIOCGWINSZ, &w) == 0)
753 {
754 if (w.ws_row > 0)
755 sys_height = w.ws_row;
756 if (w.ws_col > 0)
757 sys_width = w.ws_col;
758 }
759 }
760 #else
761 #ifdef WIOCGETD
762 {
763 struct uwdata w;
764 if (ioctl(2, WIOCGETD, &w) == 0)
765 {
766 if (w.uw_height > 0)
767 sys_height = w.uw_height / w.uw_vs;
768 if (w.uw_width > 0)
769 sys_width = w.uw_width / w.uw_hs;
770 }
771 }
772 #endif
773 #endif
774 #endif
775 #endif
776 #endif
777 #endif
778
779 if (sys_height > 0)
780 sc_height = sys_height;
781 else if ((s = lgetenv("LINES")) != NULL)
782 sc_height = atoi(s);
783 #if !MSDOS_COMPILER
784 else if ((n = ltgetnum("li")) > 0)
785 sc_height = n;
786 #endif
787 else
788 sc_height = DEF_SC_HEIGHT;
789
790 if (sys_width > 0)
791 sc_width = sys_width;
792 else if ((s = lgetenv("COLUMNS")) != NULL)
793 sc_width = atoi(s);
794 #if !MSDOS_COMPILER
795 else if ((n = ltgetnum("co")) > 0)
796 sc_width = n;
797 #endif
798 else
799 sc_width = DEF_SC_WIDTH;
800 }
801
802 #if MSDOS_COMPILER==MSOFTC
803 /*
804 * Figure out how many empty loops it takes to delay a millisecond.
805 */
806 static void
807 get_clock()
808 {
809 clock_t start;
810
811 /*
812 * Get synchronized at the start of a tick.
813 */
814 start = clock();
815 while (clock() == start)
816 ;
817 /*
818 * Now count loops till the next tick.
819 */
820 start = clock();
821 msec_loops = 0;
822 while (clock() == start)
823 msec_loops++;
824 /*
825 * Convert from (loops per clock) to (loops per millisecond).
826 */
827 msec_loops *= CLOCKS_PER_SEC;
828 msec_loops /= 1000;
829 }
830
831 /*
832 * Delay for a specified number of milliseconds.
833 */
834 static void
835 dummy_func()
836 {
837 static long delay_dummy = 0;
838 delay_dummy++;
839 }
840
841 static void
842 delay(msec)
843 int msec;
844 {
845 long i;
846
847 while (msec-- > 0)
848 {
849 for (i = 0; i < msec_loops; i++)
850 {
851 /*
852 * Make it look like we're doing something here,
853 * so the optimizer doesn't remove the whole loop.
854 */
855 dummy_func();
856 }
857 }
858 }
859 #endif
860
861 /*
862 * Return the characters actually input by a "special" key.
863 */
864 public char *
865 special_key_str(key)
866 int key;
867 {
868 static char tbuf[40];
869 char *s;
870 #if MSDOS_COMPILER || OS2
871 static char k_right[] = { '\340', PCK_RIGHT, 0 };
872 static char k_left[] = { '\340', PCK_LEFT, 0 };
873 static char k_ctl_right[] = { '\340', PCK_CTL_RIGHT, 0 };
874 static char k_ctl_left[] = { '\340', PCK_CTL_LEFT, 0 };
875 static char k_insert[] = { '\340', PCK_INSERT, 0 };
876 static char k_delete[] = { '\340', PCK_DELETE, 0 };
877 static char k_ctl_delete[] = { '\340', PCK_CTL_DELETE, 0 };
878 static char k_ctl_backspace[] = { '\177', 0 };
879 static char k_home[] = { '\340', PCK_HOME, 0 };
880 static char k_end[] = { '\340', PCK_END, 0 };
881 static char k_up[] = { '\340', PCK_UP, 0 };
882 static char k_down[] = { '\340', PCK_DOWN, 0 };
883 static char k_backtab[] = { '\340', PCK_SHIFT_TAB, 0 };
884 static char k_pagedown[] = { '\340', PCK_PAGEDOWN, 0 };
885 static char k_pageup[] = { '\340', PCK_PAGEUP, 0 };
886 static char k_f1[] = { '\340', PCK_F1, 0 };
887 #endif
888 #if !MSDOS_COMPILER
889 char *sp = tbuf;
890 #endif
891
892 switch (key)
893 {
894 #if OS2
895 /*
896 * If windowid is not NULL, assume less is executed in
897 * the XFree86 environment.
898 */
899 case SK_RIGHT_ARROW:
900 s = windowid ? ltgetstr("kr", &sp) : k_right;
901 break;
902 case SK_LEFT_ARROW:
903 s = windowid ? ltgetstr("kl", &sp) : k_left;
904 break;
905 case SK_UP_ARROW:
906 s = windowid ? ltgetstr("ku", &sp) : k_up;
907 break;
908 case SK_DOWN_ARROW:
909 s = windowid ? ltgetstr("kd", &sp) : k_down;
910 break;
911 case SK_PAGE_UP:
912 s = windowid ? ltgetstr("kP", &sp) : k_pageup;
913 break;
914 case SK_PAGE_DOWN:
915 s = windowid ? ltgetstr("kN", &sp) : k_pagedown;
916 break;
917 case SK_HOME:
918 s = windowid ? ltgetstr("kh", &sp) : k_home;
919 break;
920 case SK_END:
921 s = windowid ? ltgetstr("@7", &sp) : k_end;
922 break;
923 case SK_DELETE:
924 if (windowid)
925 {
926 s = ltgetstr("kD", &sp);
927 if (s == NULL)
928 {
929 tbuf[0] = '\177';
930 tbuf[1] = '\0';
931 s = tbuf;
932 }
933 } else
934 s = k_delete;
935 break;
936 #endif
937 #if MSDOS_COMPILER
938 case SK_RIGHT_ARROW:
939 s = k_right;
940 break;
941 case SK_LEFT_ARROW:
942 s = k_left;
943 break;
944 case SK_UP_ARROW:
945 s = k_up;
946 break;
947 case SK_DOWN_ARROW:
948 s = k_down;
949 break;
950 case SK_PAGE_UP:
951 s = k_pageup;
952 break;
953 case SK_PAGE_DOWN:
954 s = k_pagedown;
955 break;
956 case SK_HOME:
957 s = k_home;
958 break;
959 case SK_END:
960 s = k_end;
961 break;
962 case SK_DELETE:
963 s = k_delete;
964 break;
965 #endif
966 #if MSDOS_COMPILER || OS2
967 case SK_INSERT:
968 s = k_insert;
969 break;
970 case SK_CTL_LEFT_ARROW:
971 s = k_ctl_left;
972 break;
973 case SK_CTL_RIGHT_ARROW:
974 s = k_ctl_right;
975 break;
976 case SK_CTL_BACKSPACE:
977 s = k_ctl_backspace;
978 break;
979 case SK_CTL_DELETE:
980 s = k_ctl_delete;
981 break;
982 case SK_F1:
983 s = k_f1;
984 break;
985 case SK_BACKTAB:
986 s = k_backtab;
987 break;
988 #else
989 case SK_RIGHT_ARROW:
990 s = ltgetstr("kr", &sp);
991 break;
992 case SK_LEFT_ARROW:
993 s = ltgetstr("kl", &sp);
994 break;
995 case SK_UP_ARROW:
996 s = ltgetstr("ku", &sp);
997 break;
998 case SK_DOWN_ARROW:
999 s = ltgetstr("kd", &sp);
1000 break;
1001 case SK_PAGE_UP:
1002 s = ltgetstr("kP", &sp);
1003 break;
1004 case SK_PAGE_DOWN:
1005 s = ltgetstr("kN", &sp);
1006 break;
1007 case SK_HOME:
1008 s = ltgetstr("kh", &sp);
1009 break;
1010 case SK_END:
1011 s = ltgetstr("@7", &sp);
1012 break;
1013 case SK_DELETE:
1014 s = ltgetstr("kD", &sp);
1015 if (s == NULL)
1016 {
1017 tbuf[0] = '\177';
1018 tbuf[1] = '\0';
1019 s = tbuf;
1020 }
1021 break;
1022 #endif
1023 case SK_CONTROL_K:
1024 tbuf[0] = CONTROL('K');
1025 tbuf[1] = '\0';
1026 s = tbuf;
1027 break;
1028 default:
1029 return (NULL);
1030 }
1031 return (s);
1032 }
1033
1034 /*
1035 * Get terminal capabilities via termcap.
1036 */
1037 public void
1038 get_term()
1039 {
1040 #if MSDOS_COMPILER
1041 auto_wrap = 1;
1042 ignaw = 0;
1043 can_goto_line = 1;
1044 clear_bg = 1;
1045 /*
1046 * Set up default colors.
1047 * The xx_s_width and xx_e_width vars are already initialized to 0.
1048 */
1049 #if MSDOS_COMPILER==MSOFTC
1050 sy_bg_color = _getbkcolor();
1051 sy_fg_color = _gettextcolor();
1052 get_clock();
1053 #else
1054 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1055 {
1056 struct text_info w;
1057 gettextinfo(&w);
1058 sy_bg_color = (w.attribute >> 4) & 0x0F;
1059 sy_fg_color = (w.attribute >> 0) & 0x0F;
1060 }
1061 #else
1062 #if MSDOS_COMPILER==WIN32C
1063 {
1064 DWORD nread;
1065 CONSOLE_SCREEN_BUFFER_INFO scr;
1066
1067 con_out_save = con_out = GetStdHandle(STD_OUTPUT_HANDLE);
1068 /*
1069 * Always open stdin in binary. Note this *must* be done
1070 * before any file operations have been done on fd0.
1071 */
1072 SET_BINARY(0);
1073 GetConsoleScreenBufferInfo(con_out, &scr);
1074 ReadConsoleOutputAttribute(con_out, &curr_attr,
1075 1, scr.dwCursorPosition, &nread);
1076 sy_bg_color = (curr_attr & BG_COLORS) >> 4; /* normalize */
1077 sy_fg_color = curr_attr & FG_COLORS;
1078 }
1079 #endif
1080 #endif
1081 #endif
1082 nm_fg_color = sy_fg_color;
1083 nm_bg_color = sy_bg_color;
1084 bo_fg_color = 11;
1085 bo_bg_color = 0;
1086 ul_fg_color = 9;
1087 ul_bg_color = 0;
1088 so_fg_color = 15;
1089 so_bg_color = 9;
1090 bl_fg_color = 15;
1091 bl_bg_color = 0;
1092
1093 /*
1094 * Get size of the screen.
1095 */
1096 scrsize();
1097 pos_init();
1098
1099
1100 #else /* !MSDOS_COMPILER */
1101
1102 char *sp;
1103 register char *t1, *t2;
1104 char *term;
1105 char termbuf[TERMBUF_SIZE];
1106
1107 static char sbuf[TERMSBUF_SIZE];
1108
1109 #if OS2
1110 /*
1111 * Make sure the termcap database is available.
1112 */
1113 sp = lgetenv("TERMCAP");
1114 if (sp == NULL || *sp == '\0')
1115 {
1116 char *termcap;
1117 if ((sp = homefile("termcap.dat")) != NULL)
1118 {
1119 termcap = (char *) ecalloc(strlen(sp)+9, sizeof(char));
1120 sprintf(termcap, "TERMCAP=%s", sp);
1121 free(sp);
1122 putenv(termcap);
1123 }
1124 }
1125 #endif
1126 /*
1127 * Find out what kind of terminal this is.
1128 */
1129 if ((term = lgetenv("TERM")) == NULL)
1130 term = DEFAULT_TERM;
1131 hardcopy = 0;
1132 if (tgetent(termbuf, term) != TGETENT_OK)
1133 hardcopy = 1;
1134 if (ltgetflag("hc"))
1135 hardcopy = 1;
1136
1137 /*
1138 * Get size of the screen.
1139 */
1140 scrsize();
1141 pos_init();
1142
1143 auto_wrap = ltgetflag("am");
1144 ignaw = ltgetflag("xn");
1145 above_mem = ltgetflag("da");
1146 below_mem = ltgetflag("db");
1147 clear_bg = ltgetflag("ut");
1148
1149 /*
1150 * Assumes termcap variable "sg" is the printing width of:
1151 * the standout sequence, the end standout sequence,
1152 * the underline sequence, the end underline sequence,
1153 * the boldface sequence, and the end boldface sequence.
1154 */
1155 if ((so_s_width = ltgetnum("sg")) < 0)
1156 so_s_width = 0;
1157 so_e_width = so_s_width;
1158
1159 bo_s_width = bo_e_width = so_s_width;
1160 ul_s_width = ul_e_width = so_s_width;
1161 bl_s_width = bl_e_width = so_s_width;
1162
1163 #if HILITE_SEARCH
1164 if (so_s_width > 0 || so_e_width > 0)
1165 /*
1166 * Disable highlighting by default on magic cookie terminals.
1167 * Turning on highlighting might change the displayed width
1168 * of a line, causing the display to get messed up.
1169 * The user can turn it back on with -g,
1170 * but she won't like the results.
1171 */
1172 hilite_search = 0;
1173 #endif
1174
1175 /*
1176 * Get various string-valued capabilities.
1177 */
1178 sp = sbuf;
1179
1180 #if HAVE_OSPEED
1181 sc_pad = ltgetstr("pc", &sp);
1182 if (sc_pad != NULL)
1183 PC = *sc_pad;
1184 #endif
1185
1186 sc_s_keypad = ltgetstr("ks", &sp);
1187 if (sc_s_keypad == NULL)
1188 sc_s_keypad = "";
1189 sc_e_keypad = ltgetstr("ke", &sp);
1190 if (sc_e_keypad == NULL)
1191 sc_e_keypad = "";
1192
1193 sc_init = ltgetstr("ti", &sp);
1194 if (sc_init == NULL)
1195 sc_init = "";
1196
1197 sc_deinit= ltgetstr("te", &sp);
1198 if (sc_deinit == NULL)
1199 sc_deinit = "";
1200
1201 sc_eol_clear = ltgetstr("ce", &sp);
1202 if (sc_eol_clear == NULL || *sc_eol_clear == '\0')
1203 {
1204 missing_cap = 1;
1205 sc_eol_clear = "";
1206 }
1207
1208 sc_eos_clear = ltgetstr("cd", &sp);
1209 if (below_mem && (sc_eos_clear == NULL || *sc_eos_clear == '\0'))
1210 {
1211 missing_cap = 1;
1212 sc_eos_clear = "";
1213 }
1214
1215 sc_clear = ltgetstr("cl", &sp);
1216 if (sc_clear == NULL || *sc_clear == '\0')
1217 {
1218 missing_cap = 1;
1219 sc_clear = "\n\n";
1220 }
1221
1222 sc_move = ltgetstr("cm", &sp);
1223 if (sc_move == NULL || *sc_move == '\0')
1224 {
1225 /*
1226 * This is not an error here, because we don't
1227 * always need sc_move.
1228 * We need it only if we don't have home or lower-left.
1229 */
1230 sc_move = "";
1231 can_goto_line = 0;
1232 } else
1233 can_goto_line = 1;
1234
1235 tmodes("so", "se", &sc_s_in, &sc_s_out, "", "", &sp);
1236 tmodes("us", "ue", &sc_u_in, &sc_u_out, sc_s_in, sc_s_out, &sp);
1237 tmodes("md", "me", &sc_b_in, &sc_b_out, sc_s_in, sc_s_out, &sp);
1238 tmodes("mb", "me", &sc_bl_in, &sc_bl_out, sc_s_in, sc_s_out, &sp);
1239
1240 sc_visual_bell = ltgetstr("vb", &sp);
1241 if (sc_visual_bell == NULL)
1242 sc_visual_bell = "";
1243
1244 if (ltgetflag("bs"))
1245 sc_backspace = "\b";
1246 else
1247 {
1248 sc_backspace = ltgetstr("bc", &sp);
1249 if (sc_backspace == NULL || *sc_backspace == '\0')
1250 sc_backspace = "\b";
1251 }
1252
1253 /*
1254 * Choose between using "ho" and "cm" ("home" and "cursor move")
1255 * to move the cursor to the upper left corner of the screen.
1256 */
1257 t1 = ltgetstr("ho", &sp);
1258 if (t1 == NULL)
1259 t1 = "";
1260 if (*sc_move == '\0')
1261 t2 = "";
1262 else
1263 {
1264 strcpy(sp, tgoto(sc_move, 0, 0));
1265 t2 = sp;
1266 sp += strlen(sp) + 1;
1267 }
1268 sc_home = cheaper(t1, t2, "|\b^");
1269
1270 /*
1271 * Choose between using "ll" and "cm" ("lower left" and "cursor move")
1272 * to move the cursor to the lower left corner of the screen.
1273 */
1274 t1 = ltgetstr("ll", &sp);
1275 if (t1 == NULL)
1276 t1 = "";
1277 if (*sc_move == '\0')
1278 t2 = "";
1279 else
1280 {
1281 strcpy(sp, tgoto(sc_move, 0, sc_height-1));
1282 t2 = sp;
1283 sp += strlen(sp) + 1;
1284 }
1285 sc_lower_left = cheaper(t1, t2, "\r");
1286
1287 /*
1288 * Get carriage return string.
1289 */
1290 sc_return = ltgetstr("cr", &sp);
1291 if (sc_return == NULL)
1292 sc_return = "\r";
1293
1294 /*
1295 * Choose between using "al" or "sr" ("add line" or "scroll reverse")
1296 * to add a line at the top of the screen.
1297 */
1298 t1 = ltgetstr("al", &sp);
1299 if (t1 == NULL)
1300 t1 = "";
1301 t2 = ltgetstr("sr", &sp);
1302 if (t2 == NULL)
1303 t2 = "";
1304 #if OS2
1305 if (*t1 == '\0' && *t2 == '\0')
1306 sc_addline = "";
1307 else
1308 #endif
1309 if (above_mem)
1310 sc_addline = t1;
1311 else
1312 sc_addline = cheaper(t1, t2, "");
1313 if (*sc_addline == '\0')
1314 {
1315 /*
1316 * Force repaint on any backward movement.
1317 */
1318 no_back_scroll = 1;
1319 }
1320 #endif /* MSDOS_COMPILER */
1321 }
1322
1323 #if !MSDOS_COMPILER
1324 /*
1325 * Return the cost of displaying a termcap string.
1326 * We use the trick of calling tputs, but as a char printing function
1327 * we give it inc_costcount, which just increments "costcount".
1328 * This tells us how many chars would be printed by using this string.
1329 * {{ Couldn't we just use strlen? }}
1330 */
1331 static int costcount;
1332
1333 /*ARGSUSED*/
1334 static int
1335 inc_costcount(c)
1336 int c;
1337 {
1338 costcount++;
1339 return (c);
1340 }
1341
1342 static int
1343 cost(t)
1344 char *t;
1345 {
1346 costcount = 0;
1347 tputs(t, sc_height, inc_costcount);
1348 return (costcount);
1349 }
1350
1351 /*
1352 * Return the "best" of the two given termcap strings.
1353 * The best, if both exist, is the one with the lower
1354 * cost (see cost() function).
1355 */
1356 static char *
1357 cheaper(t1, t2, def)
1358 char *t1, *t2;
1359 char *def;
1360 {
1361 if (*t1 == '\0' && *t2 == '\0')
1362 {
1363 missing_cap = 1;
1364 return (def);
1365 }
1366 if (*t1 == '\0')
1367 return (t2);
1368 if (*t2 == '\0')
1369 return (t1);
1370 if (cost(t1) < cost(t2))
1371 return (t1);
1372 return (t2);
1373 }
1374
1375 static void
1376 tmodes(incap, outcap, instr, outstr, def_instr, def_outstr, spp)
1377 char *incap;
1378 char *outcap;
1379 char **instr;
1380 char **outstr;
1381 char *def_instr;
1382 char *def_outstr;
1383 char **spp;
1384 {
1385 *instr = ltgetstr(incap, spp);
1386 if (*instr == NULL)
1387 {
1388 /* Use defaults. */
1389 *instr = def_instr;
1390 *outstr = def_outstr;
1391 return;
1392 }
1393
1394 *outstr = ltgetstr(outcap, spp);
1395 if (*outstr == NULL)
1396 /* No specific out capability; use "me". */
1397 *outstr = ltgetstr("me", spp);
1398 if (*outstr == NULL)
1399 /* Don't even have "me"; use a null string. */
1400 *outstr = "";
1401 }
1402
1403 #endif /* MSDOS_COMPILER */
1404
1405
1406 /*
1407 * Below are the functions which perform all the
1408 * terminal-specific screen manipulation.
1409 */
1410
1411
1412 #if MSDOS_COMPILER
1413
1414 #if MSDOS_COMPILER==WIN32C
1415 static void
1416 _settextposition(int row, int col)
1417 {
1418 COORD cpos;
1419 CONSOLE_SCREEN_BUFFER_INFO csbi;
1420
1421 GetConsoleScreenBufferInfo(con_out, &csbi);
1422 cpos.X = csbi.srWindow.Left + (col - 1);
1423 cpos.Y = csbi.srWindow.Top + (row - 1);
1424 SetConsoleCursorPosition(con_out, cpos);
1425 }
1426 #endif
1427
1428 /*
1429 * Initialize the screen to the correct color at startup.
1430 */
1431 static void
1432 initcolor()
1433 {
1434 SETCOLORS(nm_fg_color, nm_bg_color);
1435 #if 0
1436 /*
1437 * This clears the screen at startup. This is different from
1438 * the behavior of other versions of less. Disable it for now.
1439 */
1440 char *blanks;
1441 int row;
1442 int col;
1443
1444 /*
1445 * Create a complete, blank screen using "normal" colors.
1446 */
1447 SETCOLORS(nm_fg_color, nm_bg_color);
1448 blanks = (char *) ecalloc(width+1, sizeof(char));
1449 for (col = 0; col < sc_width; col++)
1450 blanks[col] = ' ';
1451 blanks[sc_width] = '\0';
1452 for (row = 0; row < sc_height; row++)
1453 _outtext(blanks);
1454 free(blanks);
1455 #endif
1456 }
1457 #endif
1458
1459 #if MSDOS_COMPILER==WIN32C
1460
1461 /*
1462 * Termcap-like init with a private win32 console.
1463 */
1464 static void
1465 win32_init_term()
1466 {
1467 CONSOLE_SCREEN_BUFFER_INFO scr;
1468 COORD size;
1469
1470 if (con_out_save == INVALID_HANDLE_VALUE)
1471 return;
1472
1473 GetConsoleScreenBufferInfo(con_out_save, &scr);
1474
1475 if (con_out_ours == INVALID_HANDLE_VALUE)
1476 {
1477 /*
1478 * Create our own screen buffer, so that we
1479 * may restore the original when done.
1480 */
1481 con_out_ours = CreateConsoleScreenBuffer(
1482 GENERIC_WRITE | GENERIC_READ,
1483 FILE_SHARE_WRITE | FILE_SHARE_READ,
1484 (LPSECURITY_ATTRIBUTES) NULL,
1485 CONSOLE_TEXTMODE_BUFFER,
1486 (LPVOID) NULL);
1487 }
1488
1489 size.X = scr.srWindow.Right - scr.srWindow.Left + 1;
1490 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1;
1491 SetConsoleScreenBufferSize(con_out_ours, size);
1492 SetConsoleActiveScreenBuffer(con_out_ours);
1493 con_out = con_out_ours;
1494 }
1495
1496 /*
1497 * Restore the startup console.
1498 */
1499 static void
1500 win32_deinit_term()
1501 {
1502 if (con_out_save == INVALID_HANDLE_VALUE)
1503 return;
1504 if (quitting)
1505 (void) CloseHandle(con_out_ours);
1506 SetConsoleActiveScreenBuffer(con_out_save);
1507 con_out = con_out_save;
1508 }
1509
1510 #endif
1511
1512 /*
1513 * Initialize terminal
1514 */
1515 public void
1516 init()
1517 {
1518 #if !MSDOS_COMPILER
1519 if (!no_init)
1520 tputs(sc_init, sc_height, putchr);
1521 if (!no_keypad)
1522 tputs(sc_s_keypad, sc_height, putchr);
1523 if (top_scroll)
1524 {
1525 int i;
1526
1527 /*
1528 * This is nice to terminals with no alternate screen,
1529 * but with saved scrolled-off-the-top lines. This way,
1530 * no previous line is lost, but we start with a whole
1531 * screen to ourself.
1532 */
1533 for (i = 1; i < sc_height; i++)
1534 putchr('\n');
1535 }
1536 #else
1537 #if MSDOS_COMPILER==WIN32C
1538 if (!no_init)
1539 win32_init_term();
1540 #endif
1541 initcolor();
1542 flush();
1543 #endif
1544 init_done = 1;
1545 }
1546
1547 /*
1548 * Deinitialize terminal
1549 */
1550 public void
1551 deinit()
1552 {
1553 if (!init_done)
1554 return;
1555 #if !MSDOS_COMPILER
1556 if (!no_keypad)
1557 tputs(sc_e_keypad, sc_height, putchr);
1558 if (!no_init)
1559 tputs(sc_deinit, sc_height, putchr);
1560 #else
1561 /* Restore system colors. */
1562 SETCOLORS(sy_fg_color, sy_bg_color);
1563 #if MSDOS_COMPILER==WIN32C
1564 if (!no_init)
1565 win32_deinit_term();
1566 #else
1567 /* Need clreol to make SETCOLORS take effect. */
1568 clreol();
1569 #endif
1570 #endif
1571 init_done = 0;
1572 }
1573
1574 /*
1575 * Home cursor (move to upper left corner of screen).
1576 */
1577 public void
1578 home()
1579 {
1580 #if !MSDOS_COMPILER
1581 tputs(sc_home, 1, putchr);
1582 #else
1583 flush();
1584 _settextposition(1,1);
1585 #endif
1586 }
1587
1588 /*
1589 * Add a blank line (called with cursor at home).
1590 * Should scroll the display down.
1591 */
1592 public void
1593 add_line()
1594 {
1595 #if !MSDOS_COMPILER
1596 tputs(sc_addline, sc_height, putchr);
1597 #else
1598 flush();
1599 #if MSDOS_COMPILER==MSOFTC
1600 _scrolltextwindow(_GSCROLLDOWN);
1601 _settextposition(1,1);
1602 #else
1603 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1604 movetext(1,1, sc_width,sc_height-1, 1,2);
1605 gotoxy(1,1);
1606 clreol();
1607 #else
1608 #if MSDOS_COMPILER==WIN32C
1609 {
1610 CHAR_INFO fillchar;
1611 SMALL_RECT rcSrc, rcClip;
1612 COORD new_org;
1613 CONSOLE_SCREEN_BUFFER_INFO csbi;
1614
1615 GetConsoleScreenBufferInfo(con_out,&csbi);
1616
1617 /* The clip rectangle is the entire visible screen. */
1618 rcClip.Left = csbi.srWindow.Left;
1619 rcClip.Top = csbi.srWindow.Top;
1620 rcClip.Right = csbi.srWindow.Right;
1621 rcClip.Bottom = csbi.srWindow.Bottom;
1622
1623 /* The source rectangle is the visible screen minus the last line. */
1624 rcSrc = rcClip;
1625 rcSrc.Bottom--;
1626
1627 /* Move the top left corner of the source window down one row. */
1628 new_org.X = rcSrc.Left;
1629 new_org.Y = rcSrc.Top + 1;
1630
1631 /* Fill the right character and attributes. */
1632 fillchar.Char.AsciiChar = ' ';
1633 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
1634 fillchar.Attributes = curr_attr;
1635 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar);
1636 _settextposition(1,1);
1637 }
1638 #endif
1639 #endif
1640 #endif
1641 #endif
1642 }
1643
1644 #if 0
1645 /*
1646 * Remove the n topmost lines and scroll everything below it in the
1647 * window upward. This is needed to stop leaking the topmost line
1648 * into the scrollback buffer when we go down-one-line (in WIN32).
1649 */
1650 public void
1651 remove_top(n)
1652 int n;
1653 {
1654 #if MSDOS_COMPILER==WIN32C
1655 SMALL_RECT rcSrc, rcClip;
1656 CHAR_INFO fillchar;
1657 COORD new_org;
1658 CONSOLE_SCREEN_BUFFER_INFO csbi; /* to get buffer info */
1659
1660 if (n >= sc_height - 1)
1661 {
1662 clear();
1663 home();
1664 return;
1665 }
1666
1667 flush();
1668
1669 GetConsoleScreenBufferInfo(con_out, &csbi);
1670
1671 /* Get the extent of all-visible-rows-but-the-last. */
1672 rcSrc.Left = csbi.srWindow.Left;
1673 rcSrc.Top = csbi.srWindow.Top + n;
1674 rcSrc.Right = csbi.srWindow.Right;
1675 rcSrc.Bottom = csbi.srWindow.Bottom;
1676
1677 /* Get the clip rectangle. */
1678 rcClip.Left = rcSrc.Left;
1679 rcClip.Top = csbi.srWindow.Top;
1680 rcClip.Right = rcSrc.Right;
1681 rcClip.Bottom = rcSrc.Bottom ;
1682
1683 /* Move the source window up n rows. */
1684 new_org.X = rcSrc.Left;
1685 new_org.Y = rcSrc.Top - n;
1686
1687 /* Fill the right character and attributes. */
1688 fillchar.Char.AsciiChar = ' ';
1689 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
1690 fillchar.Attributes = curr_attr;
1691
1692 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar);
1693
1694 /* Position cursor on first blank line. */
1695 goto_line(sc_height - n - 1);
1696 #endif
1697 }
1698 #endif
1699
1700 #if MSDOS_COMPILER==WIN32C
1701 /*
1702 * Clear the screen.
1703 */
1704 static void
1705 win32_clear()
1706 {
1707 /*
1708 * This will clear only the currently visible rows of the NT
1709 * console buffer, which means none of the precious scrollback
1710 * rows are touched making for faster scrolling. Note that, if
1711 * the window has fewer columns than the console buffer (i.e.
1712 * there is a horizontal scrollbar as well), the entire width
1713 * of the visible rows will be cleared.
1714 */
1715 COORD topleft;
1716 DWORD nchars;
1717 DWORD winsz;
1718 CONSOLE_SCREEN_BUFFER_INFO csbi;
1719
1720 /* get the number of cells in the current buffer */
1721 GetConsoleScreenBufferInfo(con_out, &csbi);
1722 winsz = csbi.dwSize.X * (csbi.srWindow.Bottom - csbi.srWindow.Top + 1);
1723 topleft.X = 0;
1724 topleft.Y = csbi.srWindow.Top;
1725
1726 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
1727 FillConsoleOutputCharacter(con_out, ' ', winsz, topleft, &nchars);
1728 FillConsoleOutputAttribute(con_out, curr_attr, winsz, topleft, &nchars);
1729 }
1730
1731 /*
1732 * Remove the n topmost lines and scroll everything below it in the
1733 * window upward.
1734 */
1735 public void
1736 win32_scroll_up(n)
1737 int n;
1738 {
1739 SMALL_RECT rcSrc, rcClip;
1740 CHAR_INFO fillchar;
1741 COORD topleft;
1742 COORD new_org;
1743 DWORD nchars;
1744 DWORD size;
1745 CONSOLE_SCREEN_BUFFER_INFO csbi;
1746
1747 if (n <= 0)
1748 return;
1749
1750 if (n >= sc_height - 1)
1751 {
1752 win32_clear();
1753 _settextposition(1,1);
1754 return;
1755 }
1756
1757 /* Get the extent of what will remain visible after scrolling. */
1758 GetConsoleScreenBufferInfo(con_out, &csbi);
1759 rcSrc.Left = csbi.srWindow.Left;
1760 rcSrc.Top = csbi.srWindow.Top + n;
1761 rcSrc.Right = csbi.srWindow.Right;
1762 rcSrc.Bottom = csbi.srWindow.Bottom;
1763
1764 /* Get the clip rectangle. */
1765 rcClip.Left = rcSrc.Left;
1766 rcClip.Top = csbi.srWindow.Top;
1767 rcClip.Right = rcSrc.Right;
1768 rcClip.Bottom = rcSrc.Bottom ;
1769
1770 /* Move the source text to the top of the screen. */
1771 new_org.X = rcSrc.Left;
1772 new_org.Y = 0;
1773
1774 /* Fill the right character and attributes. */
1775 fillchar.Char.AsciiChar = ' ';
1776 fillchar.Attributes = MAKEATTR(nm_fg_color, nm_bg_color);
1777
1778 /* Scroll the window. */
1779 SetConsoleTextAttribute(con_out, fillchar.Attributes);
1780 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar);
1781
1782 /* Clear remaining lines at bottom. */
1783 topleft.X = csbi.dwCursorPosition.X;
1784 topleft.Y = rcSrc.Bottom - n;
1785 size = (n * csbi.dwSize.X) + (rcSrc.Right - topleft.X);
1786 FillConsoleOutputCharacter(con_out, ' ', size, topleft,
1787 &nchars);
1788 FillConsoleOutputAttribute(con_out, fillchar.Attributes, size, topleft,
1789 &nchars);
1790 SetConsoleTextAttribute(con_out, curr_attr);
1791
1792 /* Move cursor n lines up from where it was. */
1793 csbi.dwCursorPosition.Y -= n;
1794 SetConsoleCursorPosition(con_out, csbi.dwCursorPosition);
1795 }
1796 #endif
1797
1798 /*
1799 * Move cursor to lower left corner of screen.
1800 */
1801 public void
1802 lower_left()
1803 {
1804 #if !MSDOS_COMPILER
1805 tputs(sc_lower_left, 1, putchr);
1806 #else
1807 flush();
1808 _settextposition(sc_height, 1);
1809 #endif
1810 }
1811
1812 /*
1813 * Move cursor to left position of current line.
1814 */
1815 public void
1816 line_left()
1817 {
1818 #if !MSDOS_COMPILER
1819 tputs(sc_return, 1, putchr);
1820 #else
1821 int row;
1822 flush();
1823 #if MSDOS_COMPILER==WIN32C
1824 {
1825 CONSOLE_SCREEN_BUFFER_INFO scr;
1826 GetConsoleScreenBufferInfo(con_out, &scr);
1827 row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1;
1828 }
1829 #else
1830 {
1831 struct rccoord tpos = _gettextposition();
1832 row = tpos.row;
1833 }
1834 #endif
1835 _settextposition(row, 1);
1836 #endif
1837 }
1838
1839 /*
1840 * Check if the console size has changed and reset internals
1841 * (in lieu of SIGWINCH for WIN32).
1842 */
1843 public void
1844 check_winch()
1845 {
1846 #if MSDOS_COMPILER==WIN32C
1847 CONSOLE_SCREEN_BUFFER_INFO scr;
1848 COORD size;
1849
1850 if (con_out == INVALID_HANDLE_VALUE)
1851 return;
1852
1853 flush();
1854 GetConsoleScreenBufferInfo(con_out, &scr);
1855 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1;
1856 size.X = scr.srWindow.Right - scr.srWindow.Left + 1;
1857 if (size.Y != sc_height || size.X != sc_width)
1858 {
1859 sc_height = size.Y;
1860 sc_width = size.X;
1861 if (!no_init && con_out_ours == con_out)
1862 SetConsoleScreenBufferSize(con_out, size);
1863 pos_init();
1864 wscroll = (sc_height + 1) / 2;
1865 screen_trashed = 1;
1866 }
1867 #endif
1868 }
1869
1870 /*
1871 * Goto a specific line on the screen.
1872 */
1873 public void
1874 goto_line(slinenum)
1875 int slinenum;
1876 {
1877 #if !MSDOS_COMPILER
1878 tputs(tgoto(sc_move, 0, slinenum), 1, putchr);
1879 #else
1880 flush();
1881 _settextposition(slinenum+1, 1);
1882 #endif
1883 }
1884
1885 #if MSDOS_COMPILER==MSOFTC || MSDOS_COMPILER==BORLANDC
1886 /*
1887 * Create an alternate screen which is all white.
1888 * This screen is used to create a "flash" effect, by displaying it
1889 * briefly and then switching back to the normal screen.
1890 * {{ Yuck! There must be a better way to get a visual bell. }}
1891 */
1892 static void
1893 create_flash()
1894 {
1895 #if MSDOS_COMPILER==MSOFTC
1896 struct videoconfig w;
1897 char *blanks;
1898 int row, col;
1899
1900 _getvideoconfig(&w);
1901 videopages = w.numvideopages;
1902 if (videopages < 2)
1903 {
1904 at_enter(AT_STANDOUT);
1905 at_exit();
1906 } else
1907 {
1908 _setactivepage(1);
1909 at_enter(AT_STANDOUT);
1910 blanks = (char *) ecalloc(w.numtextcols, sizeof(char));
1911 for (col = 0; col < w.numtextcols; col++)
1912 blanks[col] = ' ';
1913 for (row = w.numtextrows; row > 0; row--)
1914 _outmem(blanks, w.numtextcols);
1915 _setactivepage(0);
1916 _setvisualpage(0);
1917 free(blanks);
1918 at_exit();
1919 }
1920 #else
1921 #if MSDOS_COMPILER==BORLANDC
1922 register int n;
1923
1924 whitescreen = (unsigned short *)
1925 malloc(sc_width * sc_height * sizeof(short));
1926 if (whitescreen == NULL)
1927 return;
1928 for (n = 0; n < sc_width * sc_height; n++)
1929 whitescreen[n] = 0x7020;
1930 #else
1931 #if MSDOS_COMPILER==WIN32C
1932 register int n;
1933
1934 whitescreen = (WORD *)
1935 malloc(sc_height * sc_width * sizeof(WORD));
1936 if (whitescreen == NULL)
1937 return;
1938 /* Invert the standard colors. */
1939 for (n = 0; n < sc_width * sc_height; n++)
1940 whitescreen[n] = (WORD)((nm_fg_color << 4) | nm_bg_color);
1941 #endif
1942 #endif
1943 #endif
1944 flash_created = 1;
1945 }
1946 #endif /* MSDOS_COMPILER */
1947
1948 /*
1949 * Output the "visual bell", if there is one.
1950 */
1951 public void
1952 vbell()
1953 {
1954 #if !MSDOS_COMPILER
1955 if (*sc_visual_bell == '\0')
1956 return;
1957 tputs(sc_visual_bell, sc_height, putchr);
1958 #else
1959 #if MSDOS_COMPILER==DJGPPC
1960 ScreenVisualBell();
1961 #else
1962 #if MSDOS_COMPILER==MSOFTC
1963 /*
1964 * Create a flash screen on the second video page.
1965 * Switch to that page, then switch back.
1966 */
1967 if (!flash_created)
1968 create_flash();
1969 if (videopages < 2)
1970 return;
1971 _setvisualpage(1);
1972 delay(100);
1973 _setvisualpage(0);
1974 #else
1975 #if MSDOS_COMPILER==BORLANDC
1976 unsigned short *currscreen;
1977
1978 /*
1979 * Get a copy of the current screen.
1980 * Display the flash screen.
1981 * Then restore the old screen.
1982 */
1983 if (!flash_created)
1984 create_flash();
1985 if (whitescreen == NULL)
1986 return;
1987 currscreen = (unsigned short *)
1988 malloc(sc_width * sc_height * sizeof(short));
1989 if (currscreen == NULL) return;
1990 gettext(1, 1, sc_width, sc_height, currscreen);
1991 puttext(1, 1, sc_width, sc_height, whitescreen);
1992 delay(100);
1993 puttext(1, 1, sc_width, sc_height, currscreen);
1994 free(currscreen);
1995 #else
1996 #if MSDOS_COMPILER==WIN32C
1997 /* paint screen with an inverse color */
1998 clear();
1999
2000 /* leave it displayed for 100 msec. */
2001 Sleep(100);
2002
2003 /* restore with a redraw */
2004 repaint();
2005 #endif
2006 #endif
2007 #endif
2008 #endif
2009 #endif
2010 }
2011
2012 /*
2013 * Make a noise.
2014 */
2015 static void
2016 beep()
2017 {
2018 #if !MSDOS_COMPILER
2019 putchr(CONTROL('G'));
2020 #else
2021 #if MSDOS_COMPILER==WIN32C
2022 MessageBeep(0);
2023 #else
2024 write(1, "\7", 1);
2025 #endif
2026 #endif
2027 }
2028
2029 /*
2030 * Ring the terminal bell.
2031 */
2032 public void
2033 bell()
2034 {
2035 if (quiet == VERY_QUIET)
2036 vbell();
2037 else
2038 beep();
2039 }
2040
2041 /*
2042 * Clear the screen.
2043 */
2044 public void
2045 clear()
2046 {
2047 #if !MSDOS_COMPILER
2048 tputs(sc_clear, sc_height, putchr);
2049 #else
2050 flush();
2051 #if MSDOS_COMPILER==WIN32C
2052 win32_clear();
2053 #else
2054 _clearscreen(_GCLEARSCREEN);
2055 #endif
2056 #endif
2057 }
2058
2059 /*
2060 * Clear from the cursor to the end of the cursor's line.
2061 * {{ This must not move the cursor. }}
2062 */
2063 public void
2064 clear_eol()
2065 {
2066 #if !MSDOS_COMPILER
2067 tputs(sc_eol_clear, 1, putchr);
2068 #else
2069 #if MSDOS_COMPILER==MSOFTC
2070 short top, left;
2071 short bot, right;
2072 struct rccoord tpos;
2073
2074 flush();
2075 /*
2076 * Save current state.
2077 */
2078 tpos = _gettextposition();
2079 _gettextwindow(&top, &left, &bot, &right);
2080 /*
2081 * Set a temporary window to the current line,
2082 * from the cursor's position to the right edge of the screen.
2083 * Then clear that window.
2084 */
2085 _settextwindow(tpos.row, tpos.col, tpos.row, sc_width);
2086 _clearscreen(_GWINDOW);
2087 /*
2088 * Restore state.
2089 */
2090 _settextwindow(top, left, bot, right);
2091 _settextposition(tpos.row, tpos.col);
2092 #else
2093 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
2094 flush();
2095 clreol();
2096 #else
2097 #if MSDOS_COMPILER==WIN32C
2098 DWORD nchars;
2099 COORD cpos;
2100 CONSOLE_SCREEN_BUFFER_INFO scr;
2101
2102 flush();
2103 memset(&scr, 0, sizeof(scr));
2104 GetConsoleScreenBufferInfo(con_out, &scr);
2105 cpos.X = scr.dwCursorPosition.X;
2106 cpos.Y = scr.dwCursorPosition.Y;
2107 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
2108 FillConsoleOutputAttribute(con_out, curr_attr,
2109 scr.dwSize.X - cpos.X, cpos, &nchars);
2110 FillConsoleOutputCharacter(con_out, ' ',
2111 scr.dwSize.X - cpos.X, cpos, &nchars);
2112 #endif
2113 #endif
2114 #endif
2115 #endif
2116 }
2117
2118 /*
2119 * Clear the current line.
2120 * Clear the screen if there's off-screen memory below the display.
2121 */
2122 static void
2123 clear_eol_bot()
2124 {
2125 #if MSDOS_COMPILER
2126 clear_eol();
2127 #else
2128 if (below_mem)
2129 tputs(sc_eos_clear, 1, putchr);
2130 else
2131 tputs(sc_eol_clear, 1, putchr);
2132 #endif
2133 }
2134
2135 /*
2136 * Clear the bottom line of the display.
2137 * Leave the cursor at the beginning of the bottom line.
2138 */
2139 public void
2140 clear_bot()
2141 {
2142 /*
2143 * If we're in a non-normal attribute mode, temporarily exit
2144 * the mode while we do the clear. Some terminals fill the
2145 * cleared area with the current attribute.
2146 */
2147 if (oldbot)
2148 lower_left();
2149 else
2150 line_left();
2151
2152 if (attrmode == AT_NORMAL)
2153 clear_eol_bot();
2154 else
2155 {
2156 int saved_attrmode = attrmode;
2157
2158 at_exit();
2159 clear_eol_bot();
2160 at_enter(saved_attrmode);
2161 }
2162 }
2163
2164 public void
2165 at_enter(attr)
2166 int attr;
2167 {
2168 attr = apply_at_specials(attr);
2169
2170 #if !MSDOS_COMPILER
2171 /* The one with the most priority is last. */
2172 if (attr & AT_UNDERLINE)
2173 tputs(sc_u_in, 1, putchr);
2174 if (attr & AT_BOLD)
2175 tputs(sc_b_in, 1, putchr);
2176 if (attr & AT_BLINK)
2177 tputs(sc_bl_in, 1, putchr);
2178 if (attr & AT_STANDOUT)
2179 tputs(sc_s_in, 1, putchr);
2180 #else
2181 flush();
2182 /* The one with the most priority is first. */
2183 if (attr & AT_STANDOUT)
2184 {
2185 SETCOLORS(so_fg_color, so_bg_color);
2186 } else if (attr & AT_BLINK)
2187 {
2188 SETCOLORS(bl_fg_color, bl_bg_color);
2189 }
2190 else if (attr & AT_BOLD)
2191 {
2192 SETCOLORS(bo_fg_color, bo_bg_color);
2193 }
2194 else if (attr & AT_UNDERLINE)
2195 {
2196 SETCOLORS(ul_fg_color, ul_bg_color);
2197 }
2198 #endif
2199
2200 attrmode = attr;
2201 }
2202
2203 public void
2204 at_exit()
2205 {
2206 #if !MSDOS_COMPILER
2207 /* Undo things in the reverse order we did them. */
2208 if (attrmode & AT_STANDOUT)
2209 tputs(sc_s_out, 1, putchr);
2210 if (attrmode & AT_BLINK)
2211 tputs(sc_bl_out, 1, putchr);
2212 if (attrmode & AT_BOLD)
2213 tputs(sc_b_out, 1, putchr);
2214 if (attrmode & AT_UNDERLINE)
2215 tputs(sc_u_out, 1, putchr);
2216 #else
2217 flush();
2218 SETCOLORS(nm_fg_color, nm_bg_color);
2219 #endif
2220
2221 attrmode = AT_NORMAL;
2222 }
2223
2224 public void
2225 at_switch(attr)
2226 int attr;
2227 {
2228 int new_attrmode = apply_at_specials(attr);
2229 int ignore_modes = AT_ANSI;
2230
2231 if ((new_attrmode & ~ignore_modes) != (attrmode & ~ignore_modes))
2232 {
2233 at_exit();
2234 at_enter(attr);
2235 }
2236 }
2237
2238 public int
2239 is_at_equiv(attr1, attr2)
2240 int attr1;
2241 int attr2;
2242 {
2243 attr1 = apply_at_specials(attr1);
2244 attr2 = apply_at_specials(attr2);
2245
2246 return (attr1 == attr2);
2247 }
2248
2249 public int
2250 apply_at_specials(attr)
2251 int attr;
2252 {
2253 if (attr & AT_BINARY)
2254 attr |= binattr;
2255 if (attr & AT_HILITE)
2256 attr |= AT_STANDOUT;
2257 attr &= ~(AT_BINARY|AT_HILITE);
2258
2259 return attr;
2260 }
2261
2262 #if 0 /* No longer used */
2263 /*
2264 * Erase the character to the left of the cursor
2265 * and move the cursor left.
2266 */
2267 public void
2268 backspace()
2269 {
2270 #if !MSDOS_COMPILER
2271 /*
2272 * Erase the previous character by overstriking with a space.
2273 */
2274 tputs(sc_backspace, 1, putchr);
2275 putchr(' ');
2276 tputs(sc_backspace, 1, putchr);
2277 #else
2278 #if MSDOS_COMPILER==MSOFTC
2279 struct rccoord tpos;
2280
2281 flush();
2282 tpos = _gettextposition();
2283 if (tpos.col <= 1)
2284 return;
2285 _settextposition(tpos.row, tpos.col-1);
2286 _outtext(" ");
2287 _settextposition(tpos.row, tpos.col-1);
2288 #else
2289 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
2290 cputs("\b");
2291 #else
2292 #if MSDOS_COMPILER==WIN32C
2293 COORD cpos;
2294 DWORD cChars;
2295 CONSOLE_SCREEN_BUFFER_INFO scr;
2296
2297 flush();
2298 GetConsoleScreenBufferInfo(con_out, &scr);
2299 cpos = scr.dwCursorPosition;
2300 if (cpos.X <= 0)
2301 return;
2302 cpos.X--;
2303 SetConsoleCursorPosition(con_out, cpos);
2304 FillConsoleOutputCharacter(con_out, (TCHAR)' ', 1, cpos, &cChars);
2305 SetConsoleCursorPosition(con_out, cpos);
2306 #endif
2307 #endif
2308 #endif
2309 #endif
2310 }
2311 #endif /* 0 */
2312
2313 /*
2314 * Output a plain backspace, without erasing the previous char.
2315 */
2316 public void
2317 putbs()
2318 {
2319 #if !MSDOS_COMPILER
2320 tputs(sc_backspace, 1, putchr);
2321 #else
2322 int row, col;
2323
2324 flush();
2325 {
2326 #if MSDOS_COMPILER==MSOFTC
2327 struct rccoord tpos;
2328 tpos = _gettextposition();
2329 row = tpos.row;
2330 col = tpos.col;
2331 #else
2332 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
2333 row = wherey();
2334 col = wherex();
2335 #else
2336 #if MSDOS_COMPILER==WIN32C
2337 CONSOLE_SCREEN_BUFFER_INFO scr;
2338 GetConsoleScreenBufferInfo(con_out, &scr);
2339 row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1;
2340 col = scr.dwCursorPosition.X - scr.srWindow.Left + 1;
2341 #endif
2342 #endif
2343 #endif
2344 }
2345 if (col <= 1)
2346 return;
2347 _settextposition(row, col-1);
2348 #endif /* MSDOS_COMPILER */
2349 }
2350
2351 #if MSDOS_COMPILER==WIN32C
2352 /*
2353 * Determine whether an input character is waiting to be read.
2354 */
2355 static int
2356 win32_kbhit(tty)
2357 HANDLE tty;
2358 {
2359 INPUT_RECORD ip;
2360 DWORD read;
2361
2362 if (keyCount > 0)
2363 return (TRUE);
2364
2365 currentKey.ascii = 0;
2366 currentKey.scan = 0;
2367
2368 /*
2369 * Wait for a real key-down event, but
2370 * ignore SHIFT and CONTROL key events.
2371 */
2372 do
2373 {
2374 PeekConsoleInput(tty, &ip, 1, &read);
2375 if (read == 0)
2376 return (FALSE);
2377 ReadConsoleInput(tty, &ip, 1, &read);
2378 } while (ip.EventType != KEY_EVENT ||
2379 ip.Event.KeyEvent.bKeyDown != TRUE ||
2380 ip.Event.KeyEvent.wVirtualScanCode == 0 ||
2381 ip.Event.KeyEvent.wVirtualKeyCode == VK_SHIFT ||
2382 ip.Event.KeyEvent.wVirtualKeyCode == VK_CONTROL ||
2383 ip.Event.KeyEvent.wVirtualKeyCode == VK_MENU);
2384
2385 currentKey.ascii = ip.Event.KeyEvent.uChar.AsciiChar;
2386 currentKey.scan = ip.Event.KeyEvent.wVirtualScanCode;
2387 keyCount = ip.Event.KeyEvent.wRepeatCount;
2388
2389 if (ip.Event.KeyEvent.dwControlKeyState &
2390 (LEFT_ALT_PRESSED | RIGHT_ALT_PRESSED))
2391 {
2392 switch (currentKey.scan)
2393 {
2394 case PCK_ALT_E: /* letter 'E' */
2395 currentKey.ascii = 0;
2396 break;
2397 }
2398 } else if (ip.Event.KeyEvent.dwControlKeyState &
2399 (LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED))
2400 {
2401 switch (currentKey.scan)
2402 {
2403 case PCK_RIGHT: /* right arrow */
2404 currentKey.scan = PCK_CTL_RIGHT;
2405 break;
2406 case PCK_LEFT: /* left arrow */
2407 currentKey.scan = PCK_CTL_LEFT;
2408 break;
2409 case PCK_DELETE: /* delete */
2410 currentKey.scan = PCK_CTL_DELETE;
2411 break;
2412 }
2413 }
2414 return (TRUE);
2415 }
2416
2417 /*
2418 * Read a character from the keyboard.
2419 */
2420 public char
2421 WIN32getch(tty)
2422 int tty;
2423 {
2424 int ascii;
2425
2426 if (pending_scancode)
2427 {
2428 pending_scancode = 0;
2429 return ((char)(currentKey.scan & 0x00FF));
2430 }
2431
2432 while (win32_kbhit((HANDLE)tty) == FALSE)
2433 {
2434 Sleep(20);
2435 if (ABORT_SIGS())
2436 return ('\003');
2437 continue;
2438 }
2439 keyCount --;
2440 ascii = currentKey.ascii;
2441 /*
2442 * On PC's, the extended keys return a 2 byte sequence beginning
2443 * with '00', so if the ascii code is 00, the next byte will be
2444 * the lsb of the scan code.
2445 */
2446 pending_scancode = (ascii == 0x00);
2447 return ((char)ascii);
2448 }
2449 #endif
DragonFly vkernel multiprocessor port