1 /*
2 * Copyright (C) 1984-2017 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 utf_mode;
130 extern int quitting;
131 static void win32_init_term();
132 static void win32_deinit_term();
133
134 #ifndef ENABLE_VIRTUAL_TERMINAL_PROCESSING
135 #define ENABLE_VIRTUAL_TERMINAL_PROCESSING 4
136 #endif
137
138 #define FG_COLORS (FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_INTENSITY)
139 #define BG_COLORS (BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE | BACKGROUND_INTENSITY)
140 #define MAKEATTR(fg,bg) ((WORD)((fg)|((bg)<<4)))
141 #define SETCOLORS(fg,bg) { curr_attr = MAKEATTR(fg,bg); \
142 if (SetConsoleTextAttribute(con_out, curr_attr) == 0) \
143 error("SETCOLORS failed", NULL_PARG); }
144 #endif
145
146 #if MSDOS_COMPILER
147 public int nm_fg_color; /* Color of normal text */
148 public int nm_bg_color;
149 public int bo_fg_color; /* Color of bold text */
150 public int bo_bg_color;
151 public int ul_fg_color; /* Color of underlined text */
152 public int ul_bg_color;
153 public int so_fg_color; /* Color of standout text */
154 public int so_bg_color;
155 public int bl_fg_color; /* Color of blinking text */
156 public int bl_bg_color;
157 static int sy_fg_color; /* Color of system text (before less) */
158 static int sy_bg_color;
159 public int sgr_mode; /* Honor ANSI sequences rather than using above */
160 #if MSDOS_COMPILER==WIN32C
161 public int have_ul; /* Is underline available? */
162 #endif
163 #else
164
165 /*
166 * Strings passed to tputs() to do various terminal functions.
167 */
168 static char
169 *sc_pad, /* Pad string */
170 *sc_home, /* Cursor home */
171 *sc_addline, /* Add line, scroll down following lines */
172 *sc_lower_left, /* Cursor to last line, first column */
173 *sc_return, /* Cursor to beginning of current line */
174 *sc_move, /* General cursor positioning */
175 *sc_clear, /* Clear screen */
176 *sc_eol_clear, /* Clear to end of line */
177 *sc_eos_clear, /* Clear to end of screen */
178 *sc_s_in, /* Enter standout (highlighted) mode */
179 *sc_s_out, /* Exit standout mode */
180 *sc_u_in, /* Enter underline mode */
181 *sc_u_out, /* Exit underline mode */
182 *sc_b_in, /* Enter bold mode */
183 *sc_b_out, /* Exit bold mode */
184 *sc_bl_in, /* Enter blink mode */
185 *sc_bl_out, /* Exit blink mode */
186 *sc_visual_bell, /* Visual bell (flash screen) sequence */
187 *sc_backspace, /* Backspace cursor */
188 *sc_s_keypad, /* Start keypad mode */
189 *sc_e_keypad, /* End keypad mode */
190 *sc_init, /* Startup terminal initialization */
191 *sc_deinit; /* Exit terminal de-initialization */
192 #endif
193
194 static int init_done = 0;
195
196 public int auto_wrap; /* Terminal does \r\n when write past margin */
197 public int ignaw; /* Terminal ignores \n immediately after wrap */
198 public int erase_char; /* The user's erase char */
199 public int erase2_char; /* The user's other erase char */
200 public int kill_char; /* The user's line-kill char */
201 public int werase_char; /* The user's word-erase char */
202 public int sc_width, sc_height; /* Height & width of screen */
203 public int bo_s_width, bo_e_width; /* Printing width of boldface seq */
204 public int ul_s_width, ul_e_width; /* Printing width of underline seq */
205 public int so_s_width, so_e_width; /* Printing width of standout seq */
206 public int bl_s_width, bl_e_width; /* Printing width of blink seq */
207 public int above_mem, below_mem; /* Memory retained above/below screen */
208 public int can_goto_line; /* Can move cursor to any line */
209 public int clear_bg; /* Clear fills with background color */
210 public int missing_cap = 0; /* Some capability is missing */
211 public char *kent = NULL; /* Keypad ENTER sequence */
212
213 static int attrmode = AT_NORMAL;
214 extern int binattr;
215 extern int line_count;
216
217 #if !MSDOS_COMPILER
218 static char *cheaper();
219 static void tmodes();
220 #endif
221
222 /*
223 * These two variables are sometimes defined in,
224 * and needed by, the termcap library.
225 */
226 #if MUST_DEFINE_OSPEED
227 extern short ospeed; /* Terminal output baud rate */
228 extern char PC; /* Pad character */
229 #endif
230 #ifdef _OSK
231 short ospeed;
232 char PC_, *UP, *BC;
233 #endif
234
235 extern int quiet; /* If VERY_QUIET, use visual bell for bell */
236 extern int no_back_scroll;
237 extern int swindow;
238 extern int no_init;
239 extern int no_keypad;
240 extern int sigs;
241 extern int wscroll;
242 extern int screen_trashed;
243 extern int tty;
244 extern int top_scroll;
245 extern int quit_if_one_screen;
246 extern int oldbot;
247 #if HILITE_SEARCH
248 extern int hilite_search;
249 #endif
250
251 extern char *tgetstr();
252 extern char *tgoto();
253
254
255 /*
256 * Change terminal to "raw mode", or restore to "normal" mode.
257 * "Raw mode" means
258 * 1. An outstanding read will complete on receipt of a single keystroke.
259 * 2. Input is not echoed.
260 * 3. On output, \n is mapped to \r\n.
261 * 4. \t is NOT expanded into spaces.
262 * 5. Signal-causing characters such as ctrl-C (interrupt),
263 * etc. are NOT disabled.
264 * It doesn't matter whether an input \n is mapped to \r, or vice versa.
265 */
266 public void
raw_mode(on)267 raw_mode(on)
268 int on;
269 {
270 static int curr_on = 0;
271
272 if (on == curr_on)
273 return;
274 erase2_char = '\b'; /* in case OS doesn't know about erase2 */
275 #if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS
276 {
277 struct termios s;
278 static struct termios save_term;
279 static int saved_term = 0;
280
281 if (on)
282 {
283 /*
284 * Get terminal modes.
285 */
286 tcgetattr(tty, &s);
287
288 /*
289 * Save modes and set certain variables dependent on modes.
290 */
291 if (!saved_term)
292 {
293 save_term = s;
294 saved_term = 1;
295 }
296 #if HAVE_OSPEED
297 switch (cfgetospeed(&s))
298 {
299 #ifdef B0
300 case B0: ospeed = 0; break;
301 #endif
302 #ifdef B50
303 case B50: ospeed = 1; break;
304 #endif
305 #ifdef B75
306 case B75: ospeed = 2; break;
307 #endif
308 #ifdef B110
309 case B110: ospeed = 3; break;
310 #endif
311 #ifdef B134
312 case B134: ospeed = 4; break;
313 #endif
314 #ifdef B150
315 case B150: ospeed = 5; break;
316 #endif
317 #ifdef B200
318 case B200: ospeed = 6; break;
319 #endif
320 #ifdef B300
321 case B300: ospeed = 7; break;
322 #endif
323 #ifdef B600
324 case B600: ospeed = 8; break;
325 #endif
326 #ifdef B1200
327 case B1200: ospeed = 9; break;
328 #endif
329 #ifdef B1800
330 case B1800: ospeed = 10; break;
331 #endif
332 #ifdef B2400
333 case B2400: ospeed = 11; break;
334 #endif
335 #ifdef B4800
336 case B4800: ospeed = 12; break;
337 #endif
338 #ifdef B9600
339 case B9600: ospeed = 13; break;
340 #endif
341 #ifdef EXTA
342 case EXTA: ospeed = 14; break;
343 #endif
344 #ifdef EXTB
345 case EXTB: ospeed = 15; break;
346 #endif
347 #ifdef B57600
348 case B57600: ospeed = 16; break;
349 #endif
350 #ifdef B115200
351 case B115200: ospeed = 17; break;
352 #endif
353 default: ;
354 }
355 #endif
356 erase_char = s.c_cc[VERASE];
357 #ifdef VERASE2
358 erase2_char = s.c_cc[VERASE2];
359 #endif
360 kill_char = s.c_cc[VKILL];
361 #ifdef VWERASE
362 werase_char = s.c_cc[VWERASE];
363 #else
364 werase_char = CONTROL('W');
365 #endif
366
367 /*
368 * Set the modes to the way we want them.
369 */
370 s.c_lflag &= ~(0
371 #ifdef ICANON
372 | ICANON
373 #endif
374 #ifdef ECHO
375 | ECHO
376 #endif
377 #ifdef ECHOE
378 | ECHOE
379 #endif
380 #ifdef ECHOK
381 | ECHOK
382 #endif
383 #if ECHONL
384 | ECHONL
385 #endif
386 );
387
388 s.c_oflag |= (0
389 #ifdef OXTABS
390 | OXTABS
391 #else
392 #ifdef TAB3
393 | TAB3
394 #else
395 #ifdef XTABS
396 | XTABS
397 #endif
398 #endif
399 #endif
400 #ifdef OPOST
401 | OPOST
402 #endif
403 #ifdef ONLCR
404 | ONLCR
405 #endif
406 );
407
408 s.c_oflag &= ~(0
409 #ifdef ONOEOT
410 | ONOEOT
411 #endif
412 #ifdef OCRNL
413 | OCRNL
414 #endif
415 #ifdef ONOCR
416 | ONOCR
417 #endif
418 #ifdef ONLRET
419 | ONLRET
420 #endif
421 );
422 s.c_cc[VMIN] = 1;
423 s.c_cc[VTIME] = 0;
424 #ifdef VLNEXT
425 s.c_cc[VLNEXT] = 0;
426 #endif
427 #ifdef VDSUSP
428 s.c_cc[VDSUSP] = 0;
429 #endif
430 #if MUST_SET_LINE_DISCIPLINE
431 /*
432 * System's termios is broken; need to explicitly
433 * request TERMIODISC line discipline.
434 */
435 s.c_line = TERMIODISC;
436 #endif
437 } else
438 {
439 /*
440 * Restore saved modes.
441 */
442 s = save_term;
443 }
444 #if HAVE_FSYNC
445 fsync(tty);
446 #endif
447 tcsetattr(tty, TCSADRAIN, &s);
448 #if MUST_SET_LINE_DISCIPLINE
449 if (!on)
450 {
451 /*
452 * Broken termios *ignores* any line discipline
453 * except TERMIODISC. A different old line discipline
454 * is therefore not restored, yet. Restore the old
455 * line discipline by hand.
456 */
457 ioctl(tty, TIOCSETD, &save_term.c_line);
458 }
459 #endif
460 }
461 #else
462 #ifdef TCGETA
463 {
464 struct termio s;
465 static struct termio save_term;
466 static int saved_term = 0;
467
468 if (on)
469 {
470 /*
471 * Get terminal modes.
472 */
473 ioctl(tty, TCGETA, &s);
474
475 /*
476 * Save modes and set certain variables dependent on modes.
477 */
478 if (!saved_term)
479 {
480 save_term = s;
481 saved_term = 1;
482 }
483 #if HAVE_OSPEED
484 ospeed = s.c_cflag & CBAUD;
485 #endif
486 erase_char = s.c_cc[VERASE];
487 kill_char = s.c_cc[VKILL];
488 #ifdef VWERASE
489 werase_char = s.c_cc[VWERASE];
490 #else
491 werase_char = CONTROL('W');
492 #endif
493
494 /*
495 * Set the modes to the way we want them.
496 */
497 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL);
498 s.c_oflag |= (OPOST|ONLCR|TAB3);
499 s.c_oflag &= ~(OCRNL|ONOCR|ONLRET);
500 s.c_cc[VMIN] = 1;
501 s.c_cc[VTIME] = 0;
502 } else
503 {
504 /*
505 * Restore saved modes.
506 */
507 s = save_term;
508 }
509 ioctl(tty, TCSETAW, &s);
510 }
511 #else
512 #ifdef TIOCGETP
513 {
514 struct sgttyb s;
515 static struct sgttyb save_term;
516 static int saved_term = 0;
517
518 if (on)
519 {
520 /*
521 * Get terminal modes.
522 */
523 ioctl(tty, TIOCGETP, &s);
524
525 /*
526 * Save modes and set certain variables dependent on modes.
527 */
528 if (!saved_term)
529 {
530 save_term = s;
531 saved_term = 1;
532 }
533 #if HAVE_OSPEED
534 ospeed = s.sg_ospeed;
535 #endif
536 erase_char = s.sg_erase;
537 kill_char = s.sg_kill;
538 werase_char = CONTROL('W');
539
540 /*
541 * Set the modes to the way we want them.
542 */
543 s.sg_flags |= CBREAK;
544 s.sg_flags &= ~(ECHO|XTABS);
545 } else
546 {
547 /*
548 * Restore saved modes.
549 */
550 s = save_term;
551 }
552 ioctl(tty, TIOCSETN, &s);
553 }
554 #else
555 #ifdef _OSK
556 {
557 struct sgbuf s;
558 static struct sgbuf save_term;
559 static int saved_term = 0;
560
561 if (on)
562 {
563 /*
564 * Get terminal modes.
565 */
566 _gs_opt(tty, &s);
567
568 /*
569 * Save modes and set certain variables dependent on modes.
570 */
571 if (!saved_term)
572 {
573 save_term = s;
574 saved_term = 1;
575 }
576 erase_char = s.sg_bspch;
577 kill_char = s.sg_dlnch;
578 werase_char = CONTROL('W');
579
580 /*
581 * Set the modes to the way we want them.
582 */
583 s.sg_echo = 0;
584 s.sg_eofch = 0;
585 s.sg_pause = 0;
586 s.sg_psch = 0;
587 } else
588 {
589 /*
590 * Restore saved modes.
591 */
592 s = save_term;
593 }
594 _ss_opt(tty, &s);
595 }
596 #else
597 /* MS-DOS, Windows, or OS2 */
598 #if OS2
599 /* OS2 */
600 LSIGNAL(SIGINT, SIG_IGN);
601 #endif
602 erase_char = '\b';
603 #if MSDOS_COMPILER==DJGPPC
604 kill_char = CONTROL('U');
605 /*
606 * So that when we shell out or run another program, its
607 * stdin is in cooked mode. We do not switch stdin to binary
608 * mode if fd0 is zero, since that means we were called before
609 * tty was reopened in open_getchr, in which case we would be
610 * changing the original stdin device outside less.
611 */
612 if (fd0 != 0)
613 setmode(0, on ? O_BINARY : O_TEXT);
614 #else
615 kill_char = ESC;
616 #endif
617 werase_char = CONTROL('W');
618 #endif
619 #endif
620 #endif
621 #endif
622 curr_on = on;
623 }
624
625 #if !MSDOS_COMPILER
626 /*
627 * Some glue to prevent calling termcap functions if tgetent() failed.
628 */
629 static int hardcopy;
630
631 static char *
ltget_env(capname)632 ltget_env(capname)
633 char *capname;
634 {
635 char name[16];
636 char *s;
637
638 s = lgetenv("LESS_TERMCAP_DEBUG");
639 if (s != NULL && *s != '\0')
640 {
641 struct env { struct env *next; char *name; char *value; };
642 static struct env *envs = NULL;
643 struct env *p;
644 for (p = envs; p != NULL; p = p->next)
645 if (strcmp(p->name, capname) == 0)
646 return p->value;
647 p = (struct env *) ecalloc(1, sizeof(struct env));
648 p->name = save(capname);
649 p->value = (char *) ecalloc(strlen(capname)+3, sizeof(char));
650 sprintf(p->value, "<%s>", capname);
651 p->next = envs;
652 envs = p;
653 return p->value;
654 }
655 strcpy(name, "LESS_TERMCAP_");
656 strcat(name, capname);
657 return (lgetenv(name));
658 }
659
660 static int
ltgetflag(capname)661 ltgetflag(capname)
662 char *capname;
663 {
664 char *s;
665
666 if ((s = ltget_env(capname)) != NULL)
667 return (*s != '\0' && *s != '0');
668 if (hardcopy)
669 return (0);
670 return (tgetflag(capname));
671 }
672
673 static int
ltgetnum(capname)674 ltgetnum(capname)
675 char *capname;
676 {
677 char *s;
678
679 if ((s = ltget_env(capname)) != NULL)
680 return (atoi(s));
681 if (hardcopy)
682 return (-1);
683 return (tgetnum(capname));
684 }
685
686 static char *
ltgetstr(capname,pp)687 ltgetstr(capname, pp)
688 char *capname;
689 char **pp;
690 {
691 char *s;
692
693 if ((s = ltget_env(capname)) != NULL)
694 return (s);
695 if (hardcopy)
696 return (NULL);
697 return (tgetstr(capname, pp));
698 }
699 #endif /* MSDOS_COMPILER */
700
701 /*
702 * Get size of the output screen.
703 */
704 public void
scrsize()705 scrsize()
706 {
707 char *s;
708 int sys_height;
709 int sys_width;
710 #if !MSDOS_COMPILER
711 int n;
712 #endif
713
714 #define DEF_SC_WIDTH 80
715 #if MSDOS_COMPILER
716 #define DEF_SC_HEIGHT 25
717 #else
718 #define DEF_SC_HEIGHT 24
719 #endif
720
721
722 sys_width = sys_height = 0;
723
724 #if MSDOS_COMPILER==MSOFTC
725 {
726 struct videoconfig w;
727 _getvideoconfig(&w);
728 sys_height = w.numtextrows;
729 sys_width = w.numtextcols;
730 }
731 #else
732 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
733 {
734 struct text_info w;
735 gettextinfo(&w);
736 sys_height = w.screenheight;
737 sys_width = w.screenwidth;
738 }
739 #else
740 #if MSDOS_COMPILER==WIN32C
741 {
742 CONSOLE_SCREEN_BUFFER_INFO scr;
743 GetConsoleScreenBufferInfo(con_out, &scr);
744 sys_height = scr.srWindow.Bottom - scr.srWindow.Top + 1;
745 sys_width = scr.srWindow.Right - scr.srWindow.Left + 1;
746 }
747 #else
748 #if OS2
749 {
750 int s[2];
751 _scrsize(s);
752 sys_width = s[0];
753 sys_height = s[1];
754 /*
755 * When using terminal emulators for XFree86/OS2, the
756 * _scrsize function does not work well.
757 * Call the scrsize.exe program to get the window size.
758 */
759 windowid = getenv("WINDOWID");
760 if (windowid != NULL)
761 {
762 FILE *fd = popen("scrsize", "rt");
763 if (fd != NULL)
764 {
765 int w, h;
766 fscanf(fd, "%i %i", &w, &h);
767 if (w > 0 && h > 0)
768 {
769 sys_width = w;
770 sys_height = h;
771 }
772 pclose(fd);
773 }
774 }
775 }
776 #else
777 #ifdef TIOCGWINSZ
778 {
779 struct winsize w;
780 if (ioctl(2, TIOCGWINSZ, &w) == 0)
781 {
782 if (w.ws_row > 0)
783 sys_height = w.ws_row;
784 if (w.ws_col > 0)
785 sys_width = w.ws_col;
786 }
787 }
788 #else
789 #ifdef WIOCGETD
790 {
791 struct uwdata w;
792 if (ioctl(2, WIOCGETD, &w) == 0)
793 {
794 if (w.uw_height > 0)
795 sys_height = w.uw_height / w.uw_vs;
796 if (w.uw_width > 0)
797 sys_width = w.uw_width / w.uw_hs;
798 }
799 }
800 #endif
801 #endif
802 #endif
803 #endif
804 #endif
805 #endif
806
807 if (sys_height > 0)
808 sc_height = sys_height;
809 else if ((s = lgetenv("LINES")) != NULL)
810 sc_height = atoi(s);
811 #if !MSDOS_COMPILER
812 else if ((n = ltgetnum("li")) > 0)
813 sc_height = n;
814 #endif
815 if (sc_height <= 0)
816 sc_height = DEF_SC_HEIGHT;
817
818 if (sys_width > 0)
819 sc_width = sys_width;
820 else if ((s = lgetenv("COLUMNS")) != NULL)
821 sc_width = atoi(s);
822 #if !MSDOS_COMPILER
823 else if ((n = ltgetnum("co")) > 0)
824 sc_width = n;
825 #endif
826 if (sc_width <= 0)
827 sc_width = DEF_SC_WIDTH;
828 }
829
830 #if MSDOS_COMPILER==MSOFTC
831 /*
832 * Figure out how many empty loops it takes to delay a millisecond.
833 */
834 static void
get_clock()835 get_clock()
836 {
837 clock_t start;
838
839 /*
840 * Get synchronized at the start of a tick.
841 */
842 start = clock();
843 while (clock() == start)
844 ;
845 /*
846 * Now count loops till the next tick.
847 */
848 start = clock();
849 msec_loops = 0;
850 while (clock() == start)
851 msec_loops++;
852 /*
853 * Convert from (loops per clock) to (loops per millisecond).
854 */
855 msec_loops *= CLOCKS_PER_SEC;
856 msec_loops /= 1000;
857 }
858
859 /*
860 * Delay for a specified number of milliseconds.
861 */
862 static void
dummy_func()863 dummy_func()
864 {
865 static long delay_dummy = 0;
866 delay_dummy++;
867 }
868
869 static void
delay(msec)870 delay(msec)
871 int msec;
872 {
873 long i;
874
875 while (msec-- > 0)
876 {
877 for (i = 0; i < msec_loops; i++)
878 {
879 /*
880 * Make it look like we're doing something here,
881 * so the optimizer doesn't remove the whole loop.
882 */
883 dummy_func();
884 }
885 }
886 }
887 #endif
888
889 /*
890 * Return the characters actually input by a "special" key.
891 */
892 public char *
special_key_str(key)893 special_key_str(key)
894 int key;
895 {
896 static char tbuf[40];
897 char *s;
898 #if MSDOS_COMPILER || OS2
899 static char k_right[] = { '\340', PCK_RIGHT, 0 };
900 static char k_left[] = { '\340', PCK_LEFT, 0 };
901 static char k_ctl_right[] = { '\340', PCK_CTL_RIGHT, 0 };
902 static char k_ctl_left[] = { '\340', PCK_CTL_LEFT, 0 };
903 static char k_insert[] = { '\340', PCK_INSERT, 0 };
904 static char k_delete[] = { '\340', PCK_DELETE, 0 };
905 static char k_ctl_delete[] = { '\340', PCK_CTL_DELETE, 0 };
906 static char k_ctl_backspace[] = { '\177', 0 };
907 static char k_home[] = { '\340', PCK_HOME, 0 };
908 static char k_end[] = { '\340', PCK_END, 0 };
909 static char k_up[] = { '\340', PCK_UP, 0 };
910 static char k_down[] = { '\340', PCK_DOWN, 0 };
911 static char k_backtab[] = { '\340', PCK_SHIFT_TAB, 0 };
912 static char k_pagedown[] = { '\340', PCK_PAGEDOWN, 0 };
913 static char k_pageup[] = { '\340', PCK_PAGEUP, 0 };
914 static char k_f1[] = { '\340', PCK_F1, 0 };
915 #endif
916 #if !MSDOS_COMPILER
917 char *sp = tbuf;
918 #endif
919
920 switch (key)
921 {
922 #if OS2
923 /*
924 * If windowid is not NULL, assume less is executed in
925 * the XFree86 environment.
926 */
927 case SK_RIGHT_ARROW:
928 s = windowid ? ltgetstr("kr", &sp) : k_right;
929 break;
930 case SK_LEFT_ARROW:
931 s = windowid ? ltgetstr("kl", &sp) : k_left;
932 break;
933 case SK_UP_ARROW:
934 s = windowid ? ltgetstr("ku", &sp) : k_up;
935 break;
936 case SK_DOWN_ARROW:
937 s = windowid ? ltgetstr("kd", &sp) : k_down;
938 break;
939 case SK_PAGE_UP:
940 s = windowid ? ltgetstr("kP", &sp) : k_pageup;
941 break;
942 case SK_PAGE_DOWN:
943 s = windowid ? ltgetstr("kN", &sp) : k_pagedown;
944 break;
945 case SK_HOME:
946 s = windowid ? ltgetstr("kh", &sp) : k_home;
947 break;
948 case SK_END:
949 s = windowid ? ltgetstr("@7", &sp) : k_end;
950 break;
951 case SK_DELETE:
952 if (windowid)
953 {
954 s = ltgetstr("kD", &sp);
955 if (s == NULL)
956 {
957 tbuf[0] = '\177';
958 tbuf[1] = '\0';
959 s = tbuf;
960 }
961 } else
962 s = k_delete;
963 break;
964 #endif
965 #if MSDOS_COMPILER
966 case SK_RIGHT_ARROW:
967 s = k_right;
968 break;
969 case SK_LEFT_ARROW:
970 s = k_left;
971 break;
972 case SK_UP_ARROW:
973 s = k_up;
974 break;
975 case SK_DOWN_ARROW:
976 s = k_down;
977 break;
978 case SK_PAGE_UP:
979 s = k_pageup;
980 break;
981 case SK_PAGE_DOWN:
982 s = k_pagedown;
983 break;
984 case SK_HOME:
985 s = k_home;
986 break;
987 case SK_END:
988 s = k_end;
989 break;
990 case SK_DELETE:
991 s = k_delete;
992 break;
993 #endif
994 #if MSDOS_COMPILER || OS2
995 case SK_INSERT:
996 s = k_insert;
997 break;
998 case SK_CTL_LEFT_ARROW:
999 s = k_ctl_left;
1000 break;
1001 case SK_CTL_RIGHT_ARROW:
1002 s = k_ctl_right;
1003 break;
1004 case SK_CTL_BACKSPACE:
1005 s = k_ctl_backspace;
1006 break;
1007 case SK_CTL_DELETE:
1008 s = k_ctl_delete;
1009 break;
1010 case SK_F1:
1011 s = k_f1;
1012 break;
1013 case SK_BACKTAB:
1014 s = k_backtab;
1015 break;
1016 #else
1017 case SK_RIGHT_ARROW:
1018 s = ltgetstr("kr", &sp);
1019 break;
1020 case SK_LEFT_ARROW:
1021 s = ltgetstr("kl", &sp);
1022 break;
1023 case SK_UP_ARROW:
1024 s = ltgetstr("ku", &sp);
1025 break;
1026 case SK_DOWN_ARROW:
1027 s = ltgetstr("kd", &sp);
1028 break;
1029 case SK_PAGE_UP:
1030 s = ltgetstr("kP", &sp);
1031 break;
1032 case SK_PAGE_DOWN:
1033 s = ltgetstr("kN", &sp);
1034 break;
1035 case SK_HOME:
1036 s = ltgetstr("kh", &sp);
1037 break;
1038 case SK_END:
1039 s = ltgetstr("@7", &sp);
1040 break;
1041 case SK_DELETE:
1042 s = ltgetstr("kD", &sp);
1043 if (s == NULL)
1044 {
1045 tbuf[0] = '\177';
1046 tbuf[1] = '\0';
1047 s = tbuf;
1048 }
1049 break;
1050 #endif
1051 case SK_CONTROL_K:
1052 tbuf[0] = CONTROL('K');
1053 tbuf[1] = '\0';
1054 s = tbuf;
1055 break;
1056 default:
1057 return (NULL);
1058 }
1059 return (s);
1060 }
1061
1062 /*
1063 * Get terminal capabilities via termcap.
1064 */
1065 public void
get_term()1066 get_term()
1067 {
1068 #if MSDOS_COMPILER
1069 auto_wrap = 1;
1070 ignaw = 0;
1071 can_goto_line = 1;
1072 clear_bg = 1;
1073 /*
1074 * Set up default colors.
1075 * The xx_s_width and xx_e_width vars are already initialized to 0.
1076 */
1077 #if MSDOS_COMPILER==MSOFTC
1078 sy_bg_color = _getbkcolor();
1079 sy_fg_color = _gettextcolor();
1080 get_clock();
1081 #else
1082 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1083 {
1084 struct text_info w;
1085 gettextinfo(&w);
1086 sy_bg_color = (w.attribute >> 4) & 0x0F;
1087 sy_fg_color = (w.attribute >> 0) & 0x0F;
1088 }
1089 #else
1090 #if MSDOS_COMPILER==WIN32C
1091 {
1092 DWORD nread;
1093 CONSOLE_SCREEN_BUFFER_INFO scr;
1094
1095 con_out_save = con_out = GetStdHandle(STD_OUTPUT_HANDLE);
1096 /*
1097 * Always open stdin in binary. Note this *must* be done
1098 * before any file operations have been done on fd0.
1099 */
1100 SET_BINARY(0);
1101 GetConsoleScreenBufferInfo(con_out, &scr);
1102 ReadConsoleOutputAttribute(con_out, &curr_attr,
1103 1, scr.dwCursorPosition, &nread);
1104 sy_bg_color = (curr_attr & BG_COLORS) >> 4; /* normalize */
1105 sy_fg_color = curr_attr & FG_COLORS;
1106 }
1107 #endif
1108 #endif
1109 #endif
1110 nm_fg_color = sy_fg_color;
1111 nm_bg_color = sy_bg_color;
1112 bo_fg_color = 11;
1113 bo_bg_color = 0;
1114 ul_fg_color = 9;
1115 ul_bg_color = 0;
1116 so_fg_color = 15;
1117 so_bg_color = 9;
1118 bl_fg_color = 15;
1119 bl_bg_color = 0;
1120 sgr_mode = 0;
1121
1122 /*
1123 * Get size of the screen.
1124 */
1125 scrsize();
1126 pos_init();
1127
1128
1129 #else /* !MSDOS_COMPILER */
1130
1131 char *sp;
1132 char *t1, *t2;
1133 char *term;
1134 char termbuf[TERMBUF_SIZE];
1135
1136 static char sbuf[TERMSBUF_SIZE];
1137
1138 #if OS2
1139 /*
1140 * Make sure the termcap database is available.
1141 */
1142 sp = lgetenv("TERMCAP");
1143 if (sp == NULL || *sp == '\0')
1144 {
1145 char *termcap;
1146 if ((sp = homefile("termcap.dat")) != NULL)
1147 {
1148 termcap = (char *) ecalloc(strlen(sp)+9, sizeof(char));
1149 sprintf(termcap, "TERMCAP=%s", sp);
1150 free(sp);
1151 putenv(termcap);
1152 }
1153 }
1154 #endif
1155 /*
1156 * Find out what kind of terminal this is.
1157 */
1158 if ((term = lgetenv("TERM")) == NULL)
1159 term = DEFAULT_TERM;
1160 hardcopy = 0;
1161 if (tgetent(termbuf, term) != TGETENT_OK)
1162 hardcopy = 1;
1163 if (ltgetflag("hc"))
1164 hardcopy = 1;
1165
1166 /*
1167 * Get size of the screen.
1168 */
1169 scrsize();
1170 pos_init();
1171
1172 auto_wrap = ltgetflag("am");
1173 ignaw = ltgetflag("xn");
1174 above_mem = ltgetflag("da");
1175 below_mem = ltgetflag("db");
1176 clear_bg = ltgetflag("ut");
1177
1178 /*
1179 * Assumes termcap variable "sg" is the printing width of:
1180 * the standout sequence, the end standout sequence,
1181 * the underline sequence, the end underline sequence,
1182 * the boldface sequence, and the end boldface sequence.
1183 */
1184 if ((so_s_width = ltgetnum("sg")) < 0)
1185 so_s_width = 0;
1186 so_e_width = so_s_width;
1187
1188 bo_s_width = bo_e_width = so_s_width;
1189 ul_s_width = ul_e_width = so_s_width;
1190 bl_s_width = bl_e_width = so_s_width;
1191
1192 #if HILITE_SEARCH
1193 if (so_s_width > 0 || so_e_width > 0)
1194 /*
1195 * Disable highlighting by default on magic cookie terminals.
1196 * Turning on highlighting might change the displayed width
1197 * of a line, causing the display to get messed up.
1198 * The user can turn it back on with -g,
1199 * but she won't like the results.
1200 */
1201 hilite_search = 0;
1202 #endif
1203
1204 /*
1205 * Get various string-valued capabilities.
1206 */
1207 sp = sbuf;
1208
1209 #if HAVE_OSPEED
1210 sc_pad = ltgetstr("pc", &sp);
1211 if (sc_pad != NULL)
1212 PC = *sc_pad;
1213 #endif
1214
1215 sc_s_keypad = ltgetstr("ks", &sp);
1216 if (sc_s_keypad == NULL)
1217 sc_s_keypad = "";
1218 sc_e_keypad = ltgetstr("ke", &sp);
1219 if (sc_e_keypad == NULL)
1220 sc_e_keypad = "";
1221 kent = ltgetstr("@8", &sp);
1222
1223 sc_init = ltgetstr("ti", &sp);
1224 if (sc_init == NULL)
1225 sc_init = "";
1226
1227 sc_deinit= ltgetstr("te", &sp);
1228 if (sc_deinit == NULL)
1229 sc_deinit = "";
1230
1231 sc_eol_clear = ltgetstr("ce", &sp);
1232 if (sc_eol_clear == NULL || *sc_eol_clear == '\0')
1233 {
1234 missing_cap = 1;
1235 sc_eol_clear = "";
1236 }
1237
1238 sc_eos_clear = ltgetstr("cd", &sp);
1239 if (below_mem && (sc_eos_clear == NULL || *sc_eos_clear == '\0'))
1240 {
1241 missing_cap = 1;
1242 sc_eos_clear = "";
1243 }
1244
1245 sc_clear = ltgetstr("cl", &sp);
1246 if (sc_clear == NULL || *sc_clear == '\0')
1247 {
1248 missing_cap = 1;
1249 sc_clear = "\n\n";
1250 }
1251
1252 sc_move = ltgetstr("cm", &sp);
1253 if (sc_move == NULL || *sc_move == '\0')
1254 {
1255 /*
1256 * This is not an error here, because we don't
1257 * always need sc_move.
1258 * We need it only if we don't have home or lower-left.
1259 */
1260 sc_move = "";
1261 can_goto_line = 0;
1262 } else
1263 can_goto_line = 1;
1264
1265 tmodes("so", "se", &sc_s_in, &sc_s_out, "", "", &sp);
1266 tmodes("us", "ue", &sc_u_in, &sc_u_out, sc_s_in, sc_s_out, &sp);
1267 tmodes("md", "me", &sc_b_in, &sc_b_out, sc_s_in, sc_s_out, &sp);
1268 tmodes("mb", "me", &sc_bl_in, &sc_bl_out, sc_s_in, sc_s_out, &sp);
1269
1270 sc_visual_bell = ltgetstr("vb", &sp);
1271 if (sc_visual_bell == NULL)
1272 sc_visual_bell = "";
1273
1274 if (ltgetflag("bs"))
1275 sc_backspace = "\b";
1276 else
1277 {
1278 sc_backspace = ltgetstr("bc", &sp);
1279 if (sc_backspace == NULL || *sc_backspace == '\0')
1280 sc_backspace = "\b";
1281 }
1282
1283 /*
1284 * Choose between using "ho" and "cm" ("home" and "cursor move")
1285 * to move the cursor to the upper left corner of the screen.
1286 */
1287 t1 = ltgetstr("ho", &sp);
1288 if (t1 == NULL)
1289 t1 = "";
1290 if (*sc_move == '\0')
1291 t2 = "";
1292 else
1293 {
1294 strcpy(sp, tgoto(sc_move, 0, 0));
1295 t2 = sp;
1296 sp += strlen(sp) + 1;
1297 }
1298 sc_home = cheaper(t1, t2, "|\b^");
1299
1300 /*
1301 * Choose between using "ll" and "cm" ("lower left" and "cursor move")
1302 * to move the cursor to the lower left corner of the screen.
1303 */
1304 t1 = ltgetstr("ll", &sp);
1305 if (t1 == NULL)
1306 t1 = "";
1307 if (*sc_move == '\0')
1308 t2 = "";
1309 else
1310 {
1311 strcpy(sp, tgoto(sc_move, 0, sc_height-1));
1312 t2 = sp;
1313 sp += strlen(sp) + 1;
1314 }
1315 sc_lower_left = cheaper(t1, t2, "\r");
1316
1317 /*
1318 * Get carriage return string.
1319 */
1320 sc_return = ltgetstr("cr", &sp);
1321 if (sc_return == NULL)
1322 sc_return = "\r";
1323
1324 /*
1325 * Choose between using "al" or "sr" ("add line" or "scroll reverse")
1326 * to add a line at the top of the screen.
1327 */
1328 t1 = ltgetstr("al", &sp);
1329 if (t1 == NULL)
1330 t1 = "";
1331 t2 = ltgetstr("sr", &sp);
1332 if (t2 == NULL)
1333 t2 = "";
1334 #if OS2
1335 if (*t1 == '\0' && *t2 == '\0')
1336 sc_addline = "";
1337 else
1338 #endif
1339 if (above_mem)
1340 sc_addline = t1;
1341 else
1342 sc_addline = cheaper(t1, t2, "");
1343 if (*sc_addline == '\0')
1344 {
1345 /*
1346 * Force repaint on any backward movement.
1347 */
1348 no_back_scroll = 1;
1349 }
1350 #endif /* MSDOS_COMPILER */
1351 }
1352
1353 #if !MSDOS_COMPILER
1354 /*
1355 * Return the cost of displaying a termcap string.
1356 * We use the trick of calling tputs, but as a char printing function
1357 * we give it inc_costcount, which just increments "costcount".
1358 * This tells us how many chars would be printed by using this string.
1359 * {{ Couldn't we just use strlen? }}
1360 */
1361 static int costcount;
1362
1363 /*ARGSUSED*/
1364 static int
inc_costcount(c)1365 inc_costcount(c)
1366 int c;
1367 {
1368 costcount++;
1369 return (c);
1370 }
1371
1372 static int
cost(t)1373 cost(t)
1374 char *t;
1375 {
1376 costcount = 0;
1377 tputs(t, sc_height, inc_costcount);
1378 return (costcount);
1379 }
1380
1381 /*
1382 * Return the "best" of the two given termcap strings.
1383 * The best, if both exist, is the one with the lower
1384 * cost (see cost() function).
1385 */
1386 static char *
cheaper(t1,t2,def)1387 cheaper(t1, t2, def)
1388 char *t1, *t2;
1389 char *def;
1390 {
1391 if (*t1 == '\0' && *t2 == '\0')
1392 {
1393 missing_cap = 1;
1394 return (def);
1395 }
1396 if (*t1 == '\0')
1397 return (t2);
1398 if (*t2 == '\0')
1399 return (t1);
1400 if (cost(t1) < cost(t2))
1401 return (t1);
1402 return (t2);
1403 }
1404
1405 static void
tmodes(incap,outcap,instr,outstr,def_instr,def_outstr,spp)1406 tmodes(incap, outcap, instr, outstr, def_instr, def_outstr, spp)
1407 char *incap;
1408 char *outcap;
1409 char **instr;
1410 char **outstr;
1411 char *def_instr;
1412 char *def_outstr;
1413 char **spp;
1414 {
1415 *instr = ltgetstr(incap, spp);
1416 if (*instr == NULL)
1417 {
1418 /* Use defaults. */
1419 *instr = def_instr;
1420 *outstr = def_outstr;
1421 return;
1422 }
1423
1424 *outstr = ltgetstr(outcap, spp);
1425 if (*outstr == NULL)
1426 /* No specific out capability; use "me". */
1427 *outstr = ltgetstr("me", spp);
1428 if (*outstr == NULL)
1429 /* Don't even have "me"; use a null string. */
1430 *outstr = "";
1431 }
1432
1433 #endif /* MSDOS_COMPILER */
1434
1435
1436 /*
1437 * Below are the functions which perform all the
1438 * terminal-specific screen manipulation.
1439 */
1440
1441
1442 #if MSDOS_COMPILER
1443
1444 #if MSDOS_COMPILER==WIN32C
1445 static void
_settextposition(int row,int col)1446 _settextposition(int row, int col)
1447 {
1448 COORD cpos;
1449 CONSOLE_SCREEN_BUFFER_INFO csbi;
1450
1451 GetConsoleScreenBufferInfo(con_out, &csbi);
1452 cpos.X = csbi.srWindow.Left + (col - 1);
1453 cpos.Y = csbi.srWindow.Top + (row - 1);
1454 SetConsoleCursorPosition(con_out, cpos);
1455 }
1456 #endif
1457
1458 /*
1459 * Initialize the screen to the correct color at startup.
1460 */
1461 static void
initcolor()1462 initcolor()
1463 {
1464 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1465 intensevideo();
1466 #endif
1467 SETCOLORS(nm_fg_color, nm_bg_color);
1468 #if 0
1469 /*
1470 * This clears the screen at startup. This is different from
1471 * the behavior of other versions of less. Disable it for now.
1472 */
1473 char *blanks;
1474 int row;
1475 int col;
1476
1477 /*
1478 * Create a complete, blank screen using "normal" colors.
1479 */
1480 SETCOLORS(nm_fg_color, nm_bg_color);
1481 blanks = (char *) ecalloc(width+1, sizeof(char));
1482 for (col = 0; col < sc_width; col++)
1483 blanks[col] = ' ';
1484 blanks[sc_width] = '\0';
1485 for (row = 0; row < sc_height; row++)
1486 _outtext(blanks);
1487 free(blanks);
1488 #endif
1489 }
1490 #endif
1491
1492 #if MSDOS_COMPILER==WIN32C
1493
1494 /*
1495 * Termcap-like init with a private win32 console.
1496 */
1497 static void
win32_init_term()1498 win32_init_term()
1499 {
1500 CONSOLE_SCREEN_BUFFER_INFO scr;
1501 COORD size;
1502
1503 if (con_out_save == INVALID_HANDLE_VALUE)
1504 return;
1505
1506 GetConsoleScreenBufferInfo(con_out_save, &scr);
1507
1508 if (con_out_ours == INVALID_HANDLE_VALUE)
1509 {
1510 DWORD output_mode;
1511
1512 /*
1513 * Create our own screen buffer, so that we
1514 * may restore the original when done.
1515 */
1516 con_out_ours = CreateConsoleScreenBuffer(
1517 GENERIC_WRITE | GENERIC_READ,
1518 FILE_SHARE_WRITE | FILE_SHARE_READ,
1519 (LPSECURITY_ATTRIBUTES) NULL,
1520 CONSOLE_TEXTMODE_BUFFER,
1521 (LPVOID) NULL);
1522 /*
1523 * Enable underline, if available.
1524 */
1525 GetConsoleMode(con_out_ours, &output_mode);
1526 have_ul = SetConsoleMode(con_out_ours,
1527 output_mode | ENABLE_VIRTUAL_TERMINAL_PROCESSING);
1528 }
1529
1530 size.X = scr.srWindow.Right - scr.srWindow.Left + 1;
1531 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1;
1532 SetConsoleScreenBufferSize(con_out_ours, size);
1533 SetConsoleActiveScreenBuffer(con_out_ours);
1534 con_out = con_out_ours;
1535 }
1536
1537 /*
1538 * Restore the startup console.
1539 */
1540 static void
win32_deinit_term()1541 win32_deinit_term()
1542 {
1543 if (con_out_save == INVALID_HANDLE_VALUE)
1544 return;
1545 if (quitting)
1546 (void) CloseHandle(con_out_ours);
1547 SetConsoleActiveScreenBuffer(con_out_save);
1548 con_out = con_out_save;
1549 }
1550
1551 #endif
1552
1553 /*
1554 * Initialize terminal
1555 */
1556 public void
init()1557 init()
1558 {
1559 #if !MSDOS_COMPILER
1560 if (quit_if_one_screen && line_count >= sc_height)
1561 quit_if_one_screen = FALSE;
1562 if (!no_init && !quit_if_one_screen)
1563 tputs(sc_init, sc_height, putchr);
1564 if (!no_keypad)
1565 tputs(sc_s_keypad, sc_height, putchr);
1566 if (top_scroll)
1567 {
1568 int i;
1569
1570 /*
1571 * This is nice to terminals with no alternate screen,
1572 * but with saved scrolled-off-the-top lines. This way,
1573 * no previous line is lost, but we start with a whole
1574 * screen to ourself.
1575 */
1576 for (i = 1; i < sc_height; i++)
1577 putchr('\n');
1578 } else
1579 line_left();
1580 #else
1581 #if MSDOS_COMPILER==WIN32C
1582 if (!no_init)
1583 win32_init_term();
1584 #endif
1585 initcolor();
1586 flush();
1587 #endif
1588 init_done = 1;
1589 }
1590
1591 /*
1592 * Deinitialize terminal
1593 */
1594 public void
deinit()1595 deinit()
1596 {
1597 if (!init_done)
1598 return;
1599 #if !MSDOS_COMPILER
1600 if (!no_keypad)
1601 tputs(sc_e_keypad, sc_height, putchr);
1602 if (!no_init && !quit_if_one_screen)
1603 tputs(sc_deinit, sc_height, putchr);
1604 #else
1605 /* Restore system colors. */
1606 SETCOLORS(sy_fg_color, sy_bg_color);
1607 #if MSDOS_COMPILER==WIN32C
1608 if (!no_init)
1609 win32_deinit_term();
1610 #else
1611 /* Need clreol to make SETCOLORS take effect. */
1612 clreol();
1613 #endif
1614 #endif
1615 init_done = 0;
1616 }
1617
1618 /*
1619 * Home cursor (move to upper left corner of screen).
1620 */
1621 public void
home()1622 home()
1623 {
1624 #if !MSDOS_COMPILER
1625 tputs(sc_home, 1, putchr);
1626 #else
1627 flush();
1628 _settextposition(1,1);
1629 #endif
1630 }
1631
1632 /*
1633 * Add a blank line (called with cursor at home).
1634 * Should scroll the display down.
1635 */
1636 public void
add_line()1637 add_line()
1638 {
1639 #if !MSDOS_COMPILER
1640 tputs(sc_addline, sc_height, putchr);
1641 #else
1642 flush();
1643 #if MSDOS_COMPILER==MSOFTC
1644 _scrolltextwindow(_GSCROLLDOWN);
1645 _settextposition(1,1);
1646 #else
1647 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1648 movetext(1,1, sc_width,sc_height-1, 1,2);
1649 gotoxy(1,1);
1650 clreol();
1651 #else
1652 #if MSDOS_COMPILER==WIN32C
1653 {
1654 CHAR_INFO fillchar;
1655 SMALL_RECT rcSrc, rcClip;
1656 COORD new_org;
1657 CONSOLE_SCREEN_BUFFER_INFO csbi;
1658
1659 GetConsoleScreenBufferInfo(con_out,&csbi);
1660
1661 /* The clip rectangle is the entire visible screen. */
1662 rcClip.Left = csbi.srWindow.Left;
1663 rcClip.Top = csbi.srWindow.Top;
1664 rcClip.Right = csbi.srWindow.Right;
1665 rcClip.Bottom = csbi.srWindow.Bottom;
1666
1667 /* The source rectangle is the visible screen minus the last line. */
1668 rcSrc = rcClip;
1669 rcSrc.Bottom--;
1670
1671 /* Move the top left corner of the source window down one row. */
1672 new_org.X = rcSrc.Left;
1673 new_org.Y = rcSrc.Top + 1;
1674
1675 /* Fill the right character and attributes. */
1676 fillchar.Char.AsciiChar = ' ';
1677 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
1678 fillchar.Attributes = curr_attr;
1679 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar);
1680 _settextposition(1,1);
1681 }
1682 #endif
1683 #endif
1684 #endif
1685 #endif
1686 }
1687
1688 #if 0
1689 /*
1690 * Remove the n topmost lines and scroll everything below it in the
1691 * window upward. This is needed to stop leaking the topmost line
1692 * into the scrollback buffer when we go down-one-line (in WIN32).
1693 */
1694 public void
1695 remove_top(n)
1696 int n;
1697 {
1698 #if MSDOS_COMPILER==WIN32C
1699 SMALL_RECT rcSrc, rcClip;
1700 CHAR_INFO fillchar;
1701 COORD new_org;
1702 CONSOLE_SCREEN_BUFFER_INFO csbi; /* to get buffer info */
1703
1704 if (n >= sc_height - 1)
1705 {
1706 clear();
1707 home();
1708 return;
1709 }
1710
1711 flush();
1712
1713 GetConsoleScreenBufferInfo(con_out, &csbi);
1714
1715 /* Get the extent of all-visible-rows-but-the-last. */
1716 rcSrc.Left = csbi.srWindow.Left;
1717 rcSrc.Top = csbi.srWindow.Top + n;
1718 rcSrc.Right = csbi.srWindow.Right;
1719 rcSrc.Bottom = csbi.srWindow.Bottom;
1720
1721 /* Get the clip rectangle. */
1722 rcClip.Left = rcSrc.Left;
1723 rcClip.Top = csbi.srWindow.Top;
1724 rcClip.Right = rcSrc.Right;
1725 rcClip.Bottom = rcSrc.Bottom ;
1726
1727 /* Move the source window up n rows. */
1728 new_org.X = rcSrc.Left;
1729 new_org.Y = rcSrc.Top - n;
1730
1731 /* Fill the right character and attributes. */
1732 fillchar.Char.AsciiChar = ' ';
1733 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
1734 fillchar.Attributes = curr_attr;
1735
1736 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar);
1737
1738 /* Position cursor on first blank line. */
1739 goto_line(sc_height - n - 1);
1740 #endif
1741 }
1742 #endif
1743
1744 #if MSDOS_COMPILER==WIN32C
1745 /*
1746 * Clear the screen.
1747 */
1748 static void
win32_clear()1749 win32_clear()
1750 {
1751 /*
1752 * This will clear only the currently visible rows of the NT
1753 * console buffer, which means none of the precious scrollback
1754 * rows are touched making for faster scrolling. Note that, if
1755 * the window has fewer columns than the console buffer (i.e.
1756 * there is a horizontal scrollbar as well), the entire width
1757 * of the visible rows will be cleared.
1758 */
1759 COORD topleft;
1760 DWORD nchars;
1761 DWORD winsz;
1762 CONSOLE_SCREEN_BUFFER_INFO csbi;
1763
1764 /* get the number of cells in the current buffer */
1765 GetConsoleScreenBufferInfo(con_out, &csbi);
1766 winsz = csbi.dwSize.X * (csbi.srWindow.Bottom - csbi.srWindow.Top + 1);
1767 topleft.X = 0;
1768 topleft.Y = csbi.srWindow.Top;
1769
1770 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
1771 FillConsoleOutputCharacter(con_out, ' ', winsz, topleft, &nchars);
1772 FillConsoleOutputAttribute(con_out, curr_attr, winsz, topleft, &nchars);
1773 }
1774
1775 /*
1776 * Remove the n topmost lines and scroll everything below it in the
1777 * window upward.
1778 */
1779 public void
win32_scroll_up(n)1780 win32_scroll_up(n)
1781 int n;
1782 {
1783 SMALL_RECT rcSrc, rcClip;
1784 CHAR_INFO fillchar;
1785 COORD topleft;
1786 COORD new_org;
1787 DWORD nchars;
1788 DWORD size;
1789 CONSOLE_SCREEN_BUFFER_INFO csbi;
1790
1791 if (n <= 0)
1792 return;
1793
1794 if (n >= sc_height - 1)
1795 {
1796 win32_clear();
1797 _settextposition(1,1);
1798 return;
1799 }
1800
1801 /* Get the extent of what will remain visible after scrolling. */
1802 GetConsoleScreenBufferInfo(con_out, &csbi);
1803 rcSrc.Left = csbi.srWindow.Left;
1804 rcSrc.Top = csbi.srWindow.Top + n;
1805 rcSrc.Right = csbi.srWindow.Right;
1806 rcSrc.Bottom = csbi.srWindow.Bottom;
1807
1808 /* Get the clip rectangle. */
1809 rcClip.Left = rcSrc.Left;
1810 rcClip.Top = csbi.srWindow.Top;
1811 rcClip.Right = rcSrc.Right;
1812 rcClip.Bottom = rcSrc.Bottom ;
1813
1814 /* Move the source text to the top of the screen. */
1815 new_org.X = rcSrc.Left;
1816 new_org.Y = rcClip.Top;
1817
1818 /* Fill the right character and attributes. */
1819 fillchar.Char.AsciiChar = ' ';
1820 fillchar.Attributes = MAKEATTR(nm_fg_color, nm_bg_color);
1821
1822 /* Scroll the window. */
1823 SetConsoleTextAttribute(con_out, fillchar.Attributes);
1824 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar);
1825
1826 /* Clear remaining lines at bottom. */
1827 topleft.X = csbi.dwCursorPosition.X;
1828 topleft.Y = rcSrc.Bottom - n;
1829 size = (n * csbi.dwSize.X) + (rcSrc.Right - topleft.X);
1830 FillConsoleOutputCharacter(con_out, ' ', size, topleft,
1831 &nchars);
1832 FillConsoleOutputAttribute(con_out, fillchar.Attributes, size, topleft,
1833 &nchars);
1834 SetConsoleTextAttribute(con_out, curr_attr);
1835
1836 /* Move cursor n lines up from where it was. */
1837 csbi.dwCursorPosition.Y -= n;
1838 SetConsoleCursorPosition(con_out, csbi.dwCursorPosition);
1839 }
1840 #endif
1841
1842 /*
1843 * Move cursor to lower left corner of screen.
1844 */
1845 public void
lower_left()1846 lower_left()
1847 {
1848 if (!init_done)
1849 return;
1850 #if !MSDOS_COMPILER
1851 tputs(sc_lower_left, 1, putchr);
1852 #else
1853 flush();
1854 _settextposition(sc_height, 1);
1855 #endif
1856 }
1857
1858 /*
1859 * Move cursor to left position of current line.
1860 */
1861 public void
line_left()1862 line_left()
1863 {
1864 #if !MSDOS_COMPILER
1865 tputs(sc_return, 1, putchr);
1866 #else
1867 int row;
1868 flush();
1869 #if MSDOS_COMPILER==WIN32C
1870 {
1871 CONSOLE_SCREEN_BUFFER_INFO scr;
1872 GetConsoleScreenBufferInfo(con_out, &scr);
1873 row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1;
1874 }
1875 #else
1876 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1877 row = wherey();
1878 #else
1879 {
1880 struct rccoord tpos = _gettextposition();
1881 row = tpos.row;
1882 }
1883 #endif
1884 #endif
1885 _settextposition(row, 1);
1886 #endif
1887 }
1888
1889 /*
1890 * Check if the console size has changed and reset internals
1891 * (in lieu of SIGWINCH for WIN32).
1892 */
1893 public void
check_winch()1894 check_winch()
1895 {
1896 #if MSDOS_COMPILER==WIN32C
1897 CONSOLE_SCREEN_BUFFER_INFO scr;
1898 COORD size;
1899
1900 if (con_out == INVALID_HANDLE_VALUE)
1901 return;
1902
1903 flush();
1904 GetConsoleScreenBufferInfo(con_out, &scr);
1905 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1;
1906 size.X = scr.srWindow.Right - scr.srWindow.Left + 1;
1907 if (size.Y != sc_height || size.X != sc_width)
1908 {
1909 sc_height = size.Y;
1910 sc_width = size.X;
1911 if (!no_init && con_out_ours == con_out)
1912 SetConsoleScreenBufferSize(con_out, size);
1913 pos_init();
1914 wscroll = (sc_height + 1) / 2;
1915 screen_trashed = 1;
1916 }
1917 #endif
1918 }
1919
1920 /*
1921 * Goto a specific line on the screen.
1922 */
1923 public void
goto_line(sindex)1924 goto_line(sindex)
1925 int sindex;
1926 {
1927 #if !MSDOS_COMPILER
1928 tputs(tgoto(sc_move, 0, sindex), 1, putchr);
1929 #else
1930 flush();
1931 _settextposition(sindex+1, 1);
1932 #endif
1933 }
1934
1935 #if MSDOS_COMPILER==MSOFTC || MSDOS_COMPILER==BORLANDC
1936 /*
1937 * Create an alternate screen which is all white.
1938 * This screen is used to create a "flash" effect, by displaying it
1939 * briefly and then switching back to the normal screen.
1940 * {{ Yuck! There must be a better way to get a visual bell. }}
1941 */
1942 static void
create_flash()1943 create_flash()
1944 {
1945 #if MSDOS_COMPILER==MSOFTC
1946 struct videoconfig w;
1947 char *blanks;
1948 int row, col;
1949
1950 _getvideoconfig(&w);
1951 videopages = w.numvideopages;
1952 if (videopages < 2)
1953 {
1954 at_enter(AT_STANDOUT);
1955 at_exit();
1956 } else
1957 {
1958 _setactivepage(1);
1959 at_enter(AT_STANDOUT);
1960 blanks = (char *) ecalloc(w.numtextcols, sizeof(char));
1961 for (col = 0; col < w.numtextcols; col++)
1962 blanks[col] = ' ';
1963 for (row = w.numtextrows; row > 0; row--)
1964 _outmem(blanks, w.numtextcols);
1965 _setactivepage(0);
1966 _setvisualpage(0);
1967 free(blanks);
1968 at_exit();
1969 }
1970 #else
1971 #if MSDOS_COMPILER==BORLANDC
1972 int n;
1973
1974 whitescreen = (unsigned short *)
1975 malloc(sc_width * sc_height * sizeof(short));
1976 if (whitescreen == NULL)
1977 return;
1978 for (n = 0; n < sc_width * sc_height; n++)
1979 whitescreen[n] = 0x7020;
1980 #else
1981 #if MSDOS_COMPILER==WIN32C
1982 int n;
1983
1984 whitescreen = (WORD *)
1985 malloc(sc_height * sc_width * sizeof(WORD));
1986 if (whitescreen == NULL)
1987 return;
1988 /* Invert the standard colors. */
1989 for (n = 0; n < sc_width * sc_height; n++)
1990 whitescreen[n] = (WORD)((nm_fg_color << 4) | nm_bg_color);
1991 #endif
1992 #endif
1993 #endif
1994 flash_created = 1;
1995 }
1996 #endif /* MSDOS_COMPILER */
1997
1998 /*
1999 * Output the "visual bell", if there is one.
2000 */
2001 public void
vbell()2002 vbell()
2003 {
2004 #if !MSDOS_COMPILER
2005 if (*sc_visual_bell == '\0')
2006 return;
2007 tputs(sc_visual_bell, sc_height, putchr);
2008 #else
2009 #if MSDOS_COMPILER==DJGPPC
2010 ScreenVisualBell();
2011 #else
2012 #if MSDOS_COMPILER==MSOFTC
2013 /*
2014 * Create a flash screen on the second video page.
2015 * Switch to that page, then switch back.
2016 */
2017 if (!flash_created)
2018 create_flash();
2019 if (videopages < 2)
2020 return;
2021 _setvisualpage(1);
2022 delay(100);
2023 _setvisualpage(0);
2024 #else
2025 #if MSDOS_COMPILER==BORLANDC
2026 unsigned short *currscreen;
2027
2028 /*
2029 * Get a copy of the current screen.
2030 * Display the flash screen.
2031 * Then restore the old screen.
2032 */
2033 if (!flash_created)
2034 create_flash();
2035 if (whitescreen == NULL)
2036 return;
2037 currscreen = (unsigned short *)
2038 malloc(sc_width * sc_height * sizeof(short));
2039 if (currscreen == NULL) return;
2040 gettext(1, 1, sc_width, sc_height, currscreen);
2041 puttext(1, 1, sc_width, sc_height, whitescreen);
2042 delay(100);
2043 puttext(1, 1, sc_width, sc_height, currscreen);
2044 free(currscreen);
2045 #else
2046 #if MSDOS_COMPILER==WIN32C
2047 /* paint screen with an inverse color */
2048 clear();
2049
2050 /* leave it displayed for 100 msec. */
2051 Sleep(100);
2052
2053 /* restore with a redraw */
2054 repaint();
2055 #endif
2056 #endif
2057 #endif
2058 #endif
2059 #endif
2060 }
2061
2062 /*
2063 * Make a noise.
2064 */
2065 static void
beep()2066 beep()
2067 {
2068 #if !MSDOS_COMPILER
2069 putchr(CONTROL('G'));
2070 #else
2071 #if MSDOS_COMPILER==WIN32C
2072 MessageBeep(0);
2073 #else
2074 write(1, "\7", 1);
2075 #endif
2076 #endif
2077 }
2078
2079 /*
2080 * Ring the terminal bell.
2081 */
2082 public void
bell()2083 bell()
2084 {
2085 if (quiet == VERY_QUIET)
2086 vbell();
2087 else
2088 beep();
2089 }
2090
2091 /*
2092 * Clear the screen.
2093 */
2094 public void
clear()2095 clear()
2096 {
2097 #if !MSDOS_COMPILER
2098 tputs(sc_clear, sc_height, putchr);
2099 #else
2100 flush();
2101 #if MSDOS_COMPILER==WIN32C
2102 win32_clear();
2103 #else
2104 _clearscreen(_GCLEARSCREEN);
2105 #endif
2106 #endif
2107 }
2108
2109 /*
2110 * Clear from the cursor to the end of the cursor's line.
2111 * {{ This must not move the cursor. }}
2112 */
2113 public void
clear_eol()2114 clear_eol()
2115 {
2116 #if !MSDOS_COMPILER
2117 tputs(sc_eol_clear, 1, putchr);
2118 #else
2119 #if MSDOS_COMPILER==MSOFTC
2120 short top, left;
2121 short bot, right;
2122 struct rccoord tpos;
2123
2124 flush();
2125 /*
2126 * Save current state.
2127 */
2128 tpos = _gettextposition();
2129 _gettextwindow(&top, &left, &bot, &right);
2130 /*
2131 * Set a temporary window to the current line,
2132 * from the cursor's position to the right edge of the screen.
2133 * Then clear that window.
2134 */
2135 _settextwindow(tpos.row, tpos.col, tpos.row, sc_width);
2136 _clearscreen(_GWINDOW);
2137 /*
2138 * Restore state.
2139 */
2140 _settextwindow(top, left, bot, right);
2141 _settextposition(tpos.row, tpos.col);
2142 #else
2143 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
2144 flush();
2145 clreol();
2146 #else
2147 #if MSDOS_COMPILER==WIN32C
2148 DWORD nchars;
2149 COORD cpos;
2150 CONSOLE_SCREEN_BUFFER_INFO scr;
2151
2152 flush();
2153 memset(&scr, 0, sizeof(scr));
2154 GetConsoleScreenBufferInfo(con_out, &scr);
2155 cpos.X = scr.dwCursorPosition.X;
2156 cpos.Y = scr.dwCursorPosition.Y;
2157 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
2158 FillConsoleOutputAttribute(con_out, curr_attr,
2159 scr.dwSize.X - cpos.X, cpos, &nchars);
2160 FillConsoleOutputCharacter(con_out, ' ',
2161 scr.dwSize.X - cpos.X, cpos, &nchars);
2162 #endif
2163 #endif
2164 #endif
2165 #endif
2166 }
2167
2168 /*
2169 * Clear the current line.
2170 * Clear the screen if there's off-screen memory below the display.
2171 */
2172 static void
clear_eol_bot()2173 clear_eol_bot()
2174 {
2175 #if MSDOS_COMPILER
2176 clear_eol();
2177 #else
2178 if (below_mem)
2179 tputs(sc_eos_clear, 1, putchr);
2180 else
2181 tputs(sc_eol_clear, 1, putchr);
2182 #endif
2183 }
2184
2185 /*
2186 * Clear the bottom line of the display.
2187 * Leave the cursor at the beginning of the bottom line.
2188 */
2189 public void
clear_bot()2190 clear_bot()
2191 {
2192 /*
2193 * If we're in a non-normal attribute mode, temporarily exit
2194 * the mode while we do the clear. Some terminals fill the
2195 * cleared area with the current attribute.
2196 */
2197 if (oldbot)
2198 lower_left();
2199 else
2200 line_left();
2201
2202 if (attrmode == AT_NORMAL)
2203 clear_eol_bot();
2204 else
2205 {
2206 int saved_attrmode = attrmode;
2207
2208 at_exit();
2209 clear_eol_bot();
2210 at_enter(saved_attrmode);
2211 }
2212 }
2213
2214 public void
at_enter(attr)2215 at_enter(attr)
2216 int attr;
2217 {
2218 attr = apply_at_specials(attr);
2219
2220 #if !MSDOS_COMPILER
2221 /* The one with the most priority is last. */
2222 if (attr & AT_UNDERLINE)
2223 tputs(sc_u_in, 1, putchr);
2224 if (attr & AT_BOLD)
2225 tputs(sc_b_in, 1, putchr);
2226 if (attr & AT_BLINK)
2227 tputs(sc_bl_in, 1, putchr);
2228 if (attr & AT_STANDOUT)
2229 tputs(sc_s_in, 1, putchr);
2230 #else
2231 flush();
2232 /* The one with the most priority is first. */
2233 if (attr & AT_STANDOUT)
2234 {
2235 SETCOLORS(so_fg_color, so_bg_color);
2236 } else if (attr & AT_BLINK)
2237 {
2238 SETCOLORS(bl_fg_color, bl_bg_color);
2239 }
2240 else if (attr & AT_BOLD)
2241 {
2242 SETCOLORS(bo_fg_color, bo_bg_color);
2243 }
2244 else if (attr & AT_UNDERLINE)
2245 {
2246 SETCOLORS(ul_fg_color, ul_bg_color);
2247 }
2248 #endif
2249
2250 attrmode = attr;
2251 }
2252
2253 public void
at_exit()2254 at_exit()
2255 {
2256 #if !MSDOS_COMPILER
2257 /* Undo things in the reverse order we did them. */
2258 if (attrmode & AT_STANDOUT)
2259 tputs(sc_s_out, 1, putchr);
2260 if (attrmode & AT_BLINK)
2261 tputs(sc_bl_out, 1, putchr);
2262 if (attrmode & AT_BOLD)
2263 tputs(sc_b_out, 1, putchr);
2264 if (attrmode & AT_UNDERLINE)
2265 tputs(sc_u_out, 1, putchr);
2266 #else
2267 flush();
2268 SETCOLORS(nm_fg_color, nm_bg_color);
2269 #endif
2270
2271 attrmode = AT_NORMAL;
2272 }
2273
2274 public void
at_switch(attr)2275 at_switch(attr)
2276 int attr;
2277 {
2278 int new_attrmode = apply_at_specials(attr);
2279 int ignore_modes = AT_ANSI;
2280
2281 if ((new_attrmode & ~ignore_modes) != (attrmode & ~ignore_modes))
2282 {
2283 at_exit();
2284 at_enter(attr);
2285 }
2286 }
2287
2288 public int
is_at_equiv(attr1,attr2)2289 is_at_equiv(attr1, attr2)
2290 int attr1;
2291 int attr2;
2292 {
2293 attr1 = apply_at_specials(attr1);
2294 attr2 = apply_at_specials(attr2);
2295
2296 return (attr1 == attr2);
2297 }
2298
2299 public int
apply_at_specials(attr)2300 apply_at_specials(attr)
2301 int attr;
2302 {
2303 if (attr & AT_BINARY)
2304 attr |= binattr;
2305 if (attr & AT_HILITE)
2306 attr |= AT_STANDOUT;
2307 attr &= ~(AT_BINARY|AT_HILITE);
2308
2309 return attr;
2310 }
2311
2312 #if 0 /* No longer used */
2313 /*
2314 * Erase the character to the left of the cursor
2315 * and move the cursor left.
2316 */
2317 public void
2318 backspace()
2319 {
2320 #if !MSDOS_COMPILER
2321 /*
2322 * Erase the previous character by overstriking with a space.
2323 */
2324 tputs(sc_backspace, 1, putchr);
2325 putchr(' ');
2326 tputs(sc_backspace, 1, putchr);
2327 #else
2328 #if MSDOS_COMPILER==MSOFTC
2329 struct rccoord tpos;
2330
2331 flush();
2332 tpos = _gettextposition();
2333 if (tpos.col <= 1)
2334 return;
2335 _settextposition(tpos.row, tpos.col-1);
2336 _outtext(" ");
2337 _settextposition(tpos.row, tpos.col-1);
2338 #else
2339 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
2340 cputs("\b");
2341 #else
2342 #if MSDOS_COMPILER==WIN32C
2343 COORD cpos;
2344 DWORD cChars;
2345 CONSOLE_SCREEN_BUFFER_INFO scr;
2346
2347 flush();
2348 GetConsoleScreenBufferInfo(con_out, &scr);
2349 cpos = scr.dwCursorPosition;
2350 if (cpos.X <= 0)
2351 return;
2352 cpos.X--;
2353 SetConsoleCursorPosition(con_out, cpos);
2354 FillConsoleOutputCharacter(con_out, (TCHAR)' ', 1, cpos, &cChars);
2355 SetConsoleCursorPosition(con_out, cpos);
2356 #endif
2357 #endif
2358 #endif
2359 #endif
2360 }
2361 #endif /* 0 */
2362
2363 /*
2364 * Output a plain backspace, without erasing the previous char.
2365 */
2366 public void
putbs()2367 putbs()
2368 {
2369 #if !MSDOS_COMPILER
2370 tputs(sc_backspace, 1, putchr);
2371 #else
2372 int row, col;
2373
2374 flush();
2375 {
2376 #if MSDOS_COMPILER==MSOFTC
2377 struct rccoord tpos;
2378 tpos = _gettextposition();
2379 row = tpos.row;
2380 col = tpos.col;
2381 #else
2382 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
2383 row = wherey();
2384 col = wherex();
2385 #else
2386 #if MSDOS_COMPILER==WIN32C
2387 CONSOLE_SCREEN_BUFFER_INFO scr;
2388 GetConsoleScreenBufferInfo(con_out, &scr);
2389 row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1;
2390 col = scr.dwCursorPosition.X - scr.srWindow.Left + 1;
2391 #endif
2392 #endif
2393 #endif
2394 }
2395 if (col <= 1)
2396 return;
2397 _settextposition(row, col-1);
2398 #endif /* MSDOS_COMPILER */
2399 }
2400
2401 #if MSDOS_COMPILER==WIN32C
2402 /*
2403 * Determine whether an input character is waiting to be read.
2404 */
2405 static int
win32_kbhit(tty)2406 win32_kbhit(tty)
2407 HANDLE tty;
2408 {
2409 INPUT_RECORD ip;
2410 DWORD read;
2411
2412 if (keyCount > 0)
2413 return (TRUE);
2414
2415 currentKey.ascii = 0;
2416 currentKey.scan = 0;
2417
2418 /*
2419 * Wait for a real key-down event, but
2420 * ignore SHIFT and CONTROL key events.
2421 */
2422 do
2423 {
2424 PeekConsoleInput(tty, &ip, 1, &read);
2425 if (read == 0)
2426 return (FALSE);
2427 ReadConsoleInput(tty, &ip, 1, &read);
2428 } while (ip.EventType != KEY_EVENT ||
2429 ip.Event.KeyEvent.bKeyDown != TRUE ||
2430 ip.Event.KeyEvent.wVirtualScanCode == 0 ||
2431 ip.Event.KeyEvent.wVirtualKeyCode == VK_SHIFT ||
2432 ip.Event.KeyEvent.wVirtualKeyCode == VK_CONTROL ||
2433 ip.Event.KeyEvent.wVirtualKeyCode == VK_MENU);
2434
2435 currentKey.ascii = ip.Event.KeyEvent.uChar.AsciiChar;
2436 currentKey.scan = ip.Event.KeyEvent.wVirtualScanCode;
2437 keyCount = ip.Event.KeyEvent.wRepeatCount;
2438
2439 if (ip.Event.KeyEvent.dwControlKeyState &
2440 (LEFT_ALT_PRESSED | RIGHT_ALT_PRESSED))
2441 {
2442 switch (currentKey.scan)
2443 {
2444 case PCK_ALT_E: /* letter 'E' */
2445 currentKey.ascii = 0;
2446 break;
2447 }
2448 } else if (ip.Event.KeyEvent.dwControlKeyState &
2449 (LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED))
2450 {
2451 switch (currentKey.scan)
2452 {
2453 case PCK_RIGHT: /* right arrow */
2454 currentKey.scan = PCK_CTL_RIGHT;
2455 break;
2456 case PCK_LEFT: /* left arrow */
2457 currentKey.scan = PCK_CTL_LEFT;
2458 break;
2459 case PCK_DELETE: /* delete */
2460 currentKey.scan = PCK_CTL_DELETE;
2461 break;
2462 }
2463 } else if (ip.Event.KeyEvent.dwControlKeyState & SHIFT_PRESSED)
2464 {
2465 switch (currentKey.scan)
2466 {
2467 case PCK_SHIFT_TAB: /* tab */
2468 currentKey.ascii = 0;
2469 break;
2470 }
2471 }
2472
2473 return (TRUE);
2474 }
2475
2476 /*
2477 * Read a character from the keyboard.
2478 */
2479 public char
WIN32getch(tty)2480 WIN32getch(tty)
2481 int tty;
2482 {
2483 int ascii;
2484
2485 if (pending_scancode)
2486 {
2487 pending_scancode = 0;
2488 return ((char)(currentKey.scan & 0x00FF));
2489 }
2490
2491 while (win32_kbhit((HANDLE)tty) == FALSE)
2492 {
2493 Sleep(20);
2494 if (ABORT_SIGS())
2495 return ('\003');
2496 continue;
2497 }
2498 keyCount --;
2499 ascii = currentKey.ascii;
2500 /*
2501 * On PC's, the extended keys return a 2 byte sequence beginning
2502 * with '00', so if the ascii code is 00, the next byte will be
2503 * the lsb of the scan code.
2504 */
2505 pending_scancode = (ascii == 0x00);
2506 return ((char)ascii);
2507 }
2508 #endif
2509
2510 #if MSDOS_COMPILER
2511 /*
2512 */
2513 public void
WIN32setcolors(fg,bg)2514 WIN32setcolors(fg, bg)
2515 int fg;
2516 int bg;
2517 {
2518 SETCOLORS(fg, bg);
2519 }
2520
2521 /*
2522 */
2523 public void
WIN32textout(text,len)2524 WIN32textout(text, len)
2525 char *text;
2526 int len;
2527 {
2528 #if MSDOS_COMPILER==WIN32C
2529 DWORD written;
2530 if (utf_mode == 2)
2531 {
2532 /*
2533 * We've got UTF-8 text in a non-UTF-8 console. Convert it to
2534 * wide and use WriteConsoleW.
2535 */
2536 WCHAR wtext[1024];
2537 len = MultiByteToWideChar(CP_UTF8, 0, text, len, wtext,
2538 sizeof(wtext)/sizeof(*wtext));
2539 WriteConsoleW(con_out, wtext, len, &written, NULL);
2540 } else
2541 WriteConsole(con_out, text, len, &written, NULL);
2542 #else
2543 char c = text[len];
2544 text[len] = '\0';
2545 cputs(text);
2546 text[len] = c;
2547 #endif
2548 }
2549 #endif
2550