1 /*
2 * Copyright (C) 1984-2019 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 char x11mousebuf[] = "[M???"; /* Mouse report, after ESC */
124 static int x11mousePos, x11mouseCount;
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 utf_mode;
131 extern int quitting;
132 static void win32_init_term();
133 static void win32_deinit_term();
134
135 #ifndef ENABLE_VIRTUAL_TERMINAL_PROCESSING
136 #define ENABLE_VIRTUAL_TERMINAL_PROCESSING 4
137 #endif
138
139 #define FG_COLORS (FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_INTENSITY)
140 #define BG_COLORS (BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE | BACKGROUND_INTENSITY)
141 #define MAKEATTR(fg,bg) ((WORD)((fg)|((bg)<<4)))
142 #define SETCOLORS(fg,bg) { curr_attr = MAKEATTR(fg,bg); \
143 if (SetConsoleTextAttribute(con_out, curr_attr) == 0) \
144 error("SETCOLORS failed", NULL_PARG); }
145 #endif
146
147 #if MSDOS_COMPILER
148 public int nm_fg_color; /* Color of normal text */
149 public int nm_bg_color;
150 public int bo_fg_color; /* Color of bold text */
151 public int bo_bg_color;
152 public int ul_fg_color; /* Color of underlined text */
153 public int ul_bg_color;
154 public int so_fg_color; /* Color of standout text */
155 public int so_bg_color;
156 public int bl_fg_color; /* Color of blinking text */
157 public int bl_bg_color;
158 static int sy_fg_color; /* Color of system text (before less) */
159 static int sy_bg_color;
160 public int sgr_mode; /* Honor ANSI sequences rather than using above */
161 #if MSDOS_COMPILER==WIN32C
162 public int have_ul; /* Is underline available? */
163 #endif
164 #else
165
166 /*
167 * Strings passed to tputs() to do various terminal functions.
168 */
169 static char
170 *sc_pad, /* Pad string */
171 *sc_home, /* Cursor home */
172 *sc_addline, /* Add line, scroll down following lines */
173 *sc_lower_left, /* Cursor to last line, first column */
174 *sc_return, /* Cursor to beginning of current line */
175 *sc_move, /* General cursor positioning */
176 *sc_clear, /* Clear screen */
177 *sc_eol_clear, /* Clear to end of line */
178 *sc_eos_clear, /* Clear to end of screen */
179 *sc_s_in, /* Enter standout (highlighted) mode */
180 *sc_s_out, /* Exit standout mode */
181 *sc_u_in, /* Enter underline mode */
182 *sc_u_out, /* Exit underline mode */
183 *sc_b_in, /* Enter bold mode */
184 *sc_b_out, /* Exit bold mode */
185 *sc_bl_in, /* Enter blink mode */
186 *sc_bl_out, /* Exit blink mode */
187 *sc_visual_bell, /* Visual bell (flash screen) sequence */
188 *sc_backspace, /* Backspace cursor */
189 *sc_s_keypad, /* Start keypad mode */
190 *sc_e_keypad, /* End keypad mode */
191 *sc_s_mousecap, /* Start mouse capture mode */
192 *sc_e_mousecap, /* End mouse capture mode */
193 *sc_init, /* Startup terminal initialization */
194 *sc_deinit; /* Exit terminal de-initialization */
195 #endif
196
197 static int init_done = 0;
198
199 public int auto_wrap; /* Terminal does \r\n when write past margin */
200 public int ignaw; /* Terminal ignores \n immediately after wrap */
201 public int erase_char; /* The user's erase char */
202 public int erase2_char; /* The user's other erase char */
203 public int kill_char; /* The user's line-kill char */
204 public int werase_char; /* The user's word-erase char */
205 public int sc_width, sc_height; /* Height & width of screen */
206 public int bo_s_width, bo_e_width; /* Printing width of boldface seq */
207 public int ul_s_width, ul_e_width; /* Printing width of underline seq */
208 public int so_s_width, so_e_width; /* Printing width of standout seq */
209 public int bl_s_width, bl_e_width; /* Printing width of blink seq */
210 public int above_mem, below_mem; /* Memory retained above/below screen */
211 public int can_goto_line; /* Can move cursor to any line */
212 public int clear_bg; /* Clear fills with background color */
213 public int missing_cap = 0; /* Some capability is missing */
214 public char *kent = NULL; /* Keypad ENTER sequence */
215
216 static int attrmode = AT_NORMAL;
217 static int termcap_debug = -1;
218 extern int binattr;
219 extern int one_screen;
220
221 #if !MSDOS_COMPILER
222 static char *cheaper();
223 static void tmodes();
224 #endif
225
226 /*
227 * These two variables are sometimes defined in,
228 * and needed by, the termcap library.
229 */
230 #if MUST_DEFINE_OSPEED
231 extern short ospeed; /* Terminal output baud rate */
232 extern char PC; /* Pad character */
233 #endif
234 #ifdef _OSK
235 short ospeed;
236 char PC_, *UP, *BC;
237 #endif
238
239 extern int quiet; /* If VERY_QUIET, use visual bell for bell */
240 extern int no_back_scroll;
241 extern int swindow;
242 extern int no_init;
243 extern int no_keypad;
244 extern int sigs;
245 extern int wscroll;
246 extern int screen_trashed;
247 extern int top_scroll;
248 extern int quit_if_one_screen;
249 extern int oldbot;
250 extern int mousecap;
251 #if HILITE_SEARCH
252 extern int hilite_search;
253 #endif
254 #if MSDOS_COMPILER==WIN32C
255 extern HANDLE tty;
256 #else
257 extern int tty;
258 #endif
259
260 extern char *tgetstr();
261 extern char *tgoto();
262
263
264 /*
265 * Change terminal to "raw mode", or restore to "normal" mode.
266 * "Raw mode" means
267 * 1. An outstanding read will complete on receipt of a single keystroke.
268 * 2. Input is not echoed.
269 * 3. On output, \n is mapped to \r\n.
270 * 4. \t is NOT expanded into spaces.
271 * 5. Signal-causing characters such as ctrl-C (interrupt),
272 * etc. are NOT disabled.
273 * It doesn't matter whether an input \n is mapped to \r, or vice versa.
274 */
275 public void
raw_mode(on)276 raw_mode(on)
277 int on;
278 {
279 static int curr_on = 0;
280
281 if (on == curr_on)
282 return;
283 erase2_char = '\b'; /* in case OS doesn't know about erase2 */
284 #if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS
285 {
286 struct termios s;
287 static struct termios save_term;
288 static int saved_term = 0;
289
290 if (on)
291 {
292 /*
293 * Get terminal modes.
294 */
295 tcgetattr(tty, &s);
296
297 /*
298 * Save modes and set certain variables dependent on modes.
299 */
300 if (!saved_term)
301 {
302 save_term = s;
303 saved_term = 1;
304 }
305 #if HAVE_OSPEED
306 switch (cfgetospeed(&s))
307 {
308 #ifdef B0
309 case B0: ospeed = 0; break;
310 #endif
311 #ifdef B50
312 case B50: ospeed = 1; break;
313 #endif
314 #ifdef B75
315 case B75: ospeed = 2; break;
316 #endif
317 #ifdef B110
318 case B110: ospeed = 3; break;
319 #endif
320 #ifdef B134
321 case B134: ospeed = 4; break;
322 #endif
323 #ifdef B150
324 case B150: ospeed = 5; break;
325 #endif
326 #ifdef B200
327 case B200: ospeed = 6; break;
328 #endif
329 #ifdef B300
330 case B300: ospeed = 7; break;
331 #endif
332 #ifdef B600
333 case B600: ospeed = 8; break;
334 #endif
335 #ifdef B1200
336 case B1200: ospeed = 9; break;
337 #endif
338 #ifdef B1800
339 case B1800: ospeed = 10; break;
340 #endif
341 #ifdef B2400
342 case B2400: ospeed = 11; break;
343 #endif
344 #ifdef B4800
345 case B4800: ospeed = 12; break;
346 #endif
347 #ifdef B9600
348 case B9600: ospeed = 13; break;
349 #endif
350 #ifdef EXTA
351 case EXTA: ospeed = 14; break;
352 #endif
353 #ifdef EXTB
354 case EXTB: ospeed = 15; break;
355 #endif
356 #ifdef B57600
357 case B57600: ospeed = 16; break;
358 #endif
359 #ifdef B115200
360 case B115200: ospeed = 17; break;
361 #endif
362 default: ;
363 }
364 #endif
365 erase_char = s.c_cc[VERASE];
366 #ifdef VERASE2
367 erase2_char = s.c_cc[VERASE2];
368 #endif
369 kill_char = s.c_cc[VKILL];
370 #ifdef VWERASE
371 werase_char = s.c_cc[VWERASE];
372 #else
373 werase_char = CONTROL('W');
374 #endif
375
376 /*
377 * Set the modes to the way we want them.
378 */
379 s.c_lflag &= ~(0
380 #ifdef ICANON
381 | ICANON
382 #endif
383 #ifdef ECHO
384 | ECHO
385 #endif
386 #ifdef ECHOE
387 | ECHOE
388 #endif
389 #ifdef ECHOK
390 | ECHOK
391 #endif
392 #if ECHONL
393 | ECHONL
394 #endif
395 );
396
397 s.c_oflag |= (0
398 #ifdef OXTABS
399 | OXTABS
400 #else
401 #ifdef TAB3
402 | TAB3
403 #else
404 #ifdef XTABS
405 | XTABS
406 #endif
407 #endif
408 #endif
409 #ifdef OPOST
410 | OPOST
411 #endif
412 #ifdef ONLCR
413 | ONLCR
414 #endif
415 );
416
417 s.c_oflag &= ~(0
418 #ifdef ONOEOT
419 | ONOEOT
420 #endif
421 #ifdef OCRNL
422 | OCRNL
423 #endif
424 #ifdef ONOCR
425 | ONOCR
426 #endif
427 #ifdef ONLRET
428 | ONLRET
429 #endif
430 );
431 s.c_cc[VMIN] = 1;
432 s.c_cc[VTIME] = 0;
433 #ifdef VLNEXT
434 s.c_cc[VLNEXT] = 0;
435 #endif
436 #ifdef VDSUSP
437 s.c_cc[VDSUSP] = 0;
438 #endif
439 #if MUST_SET_LINE_DISCIPLINE
440 /*
441 * System's termios is broken; need to explicitly
442 * request TERMIODISC line discipline.
443 */
444 s.c_line = TERMIODISC;
445 #endif
446 } else
447 {
448 /*
449 * Restore saved modes.
450 */
451 s = save_term;
452 }
453 #if HAVE_FSYNC
454 fsync(tty);
455 #endif
456 tcsetattr(tty, TCSADRAIN, &s);
457 #if MUST_SET_LINE_DISCIPLINE
458 if (!on)
459 {
460 /*
461 * Broken termios *ignores* any line discipline
462 * except TERMIODISC. A different old line discipline
463 * is therefore not restored, yet. Restore the old
464 * line discipline by hand.
465 */
466 ioctl(tty, TIOCSETD, &save_term.c_line);
467 }
468 #endif
469 }
470 #else
471 #ifdef TCGETA
472 {
473 struct termio s;
474 static struct termio save_term;
475 static int saved_term = 0;
476
477 if (on)
478 {
479 /*
480 * Get terminal modes.
481 */
482 ioctl(tty, TCGETA, &s);
483
484 /*
485 * Save modes and set certain variables dependent on modes.
486 */
487 if (!saved_term)
488 {
489 save_term = s;
490 saved_term = 1;
491 }
492 #if HAVE_OSPEED
493 ospeed = s.c_cflag & CBAUD;
494 #endif
495 erase_char = s.c_cc[VERASE];
496 kill_char = s.c_cc[VKILL];
497 #ifdef VWERASE
498 werase_char = s.c_cc[VWERASE];
499 #else
500 werase_char = CONTROL('W');
501 #endif
502
503 /*
504 * Set the modes to the way we want them.
505 */
506 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL);
507 s.c_oflag |= (OPOST|ONLCR|TAB3);
508 s.c_oflag &= ~(OCRNL|ONOCR|ONLRET);
509 s.c_cc[VMIN] = 1;
510 s.c_cc[VTIME] = 0;
511 } else
512 {
513 /*
514 * Restore saved modes.
515 */
516 s = save_term;
517 }
518 ioctl(tty, TCSETAW, &s);
519 }
520 #else
521 #ifdef TIOCGETP
522 {
523 struct sgttyb s;
524 static struct sgttyb save_term;
525 static int saved_term = 0;
526
527 if (on)
528 {
529 /*
530 * Get terminal modes.
531 */
532 ioctl(tty, TIOCGETP, &s);
533
534 /*
535 * Save modes and set certain variables dependent on modes.
536 */
537 if (!saved_term)
538 {
539 save_term = s;
540 saved_term = 1;
541 }
542 #if HAVE_OSPEED
543 ospeed = s.sg_ospeed;
544 #endif
545 erase_char = s.sg_erase;
546 kill_char = s.sg_kill;
547 werase_char = CONTROL('W');
548
549 /*
550 * Set the modes to the way we want them.
551 */
552 s.sg_flags |= CBREAK;
553 s.sg_flags &= ~(ECHO|XTABS);
554 } else
555 {
556 /*
557 * Restore saved modes.
558 */
559 s = save_term;
560 }
561 ioctl(tty, TIOCSETN, &s);
562 }
563 #else
564 #ifdef _OSK
565 {
566 struct sgbuf s;
567 static struct sgbuf save_term;
568 static int saved_term = 0;
569
570 if (on)
571 {
572 /*
573 * Get terminal modes.
574 */
575 _gs_opt(tty, &s);
576
577 /*
578 * Save modes and set certain variables dependent on modes.
579 */
580 if (!saved_term)
581 {
582 save_term = s;
583 saved_term = 1;
584 }
585 erase_char = s.sg_bspch;
586 kill_char = s.sg_dlnch;
587 werase_char = CONTROL('W');
588
589 /*
590 * Set the modes to the way we want them.
591 */
592 s.sg_echo = 0;
593 s.sg_eofch = 0;
594 s.sg_pause = 0;
595 s.sg_psch = 0;
596 } else
597 {
598 /*
599 * Restore saved modes.
600 */
601 s = save_term;
602 }
603 _ss_opt(tty, &s);
604 }
605 #else
606 /* MS-DOS, Windows, or OS2 */
607 #if OS2
608 /* OS2 */
609 LSIGNAL(SIGINT, SIG_IGN);
610 #endif
611 erase_char = '\b';
612 #if MSDOS_COMPILER==DJGPPC
613 kill_char = CONTROL('U');
614 /*
615 * So that when we shell out or run another program, its
616 * stdin is in cooked mode. We do not switch stdin to binary
617 * mode if fd0 is zero, since that means we were called before
618 * tty was reopened in open_getchr, in which case we would be
619 * changing the original stdin device outside less.
620 */
621 if (fd0 != 0)
622 setmode(0, on ? O_BINARY : O_TEXT);
623 #else
624 kill_char = ESC;
625 #endif
626 werase_char = CONTROL('W');
627 #endif
628 #endif
629 #endif
630 #endif
631 curr_on = on;
632 }
633
634 #if !MSDOS_COMPILER
635 /*
636 * Some glue to prevent calling termcap functions if tgetent() failed.
637 */
638 static int hardcopy;
639
640 static char *
ltget_env(capname)641 ltget_env(capname)
642 char *capname;
643 {
644 char name[64];
645 char *s;
646
647 if (termcap_debug)
648 {
649 struct env { struct env *next; char *name; char *value; };
650 static struct env *envs = NULL;
651 struct env *p;
652 for (p = envs; p != NULL; p = p->next)
653 if (strcmp(p->name, capname) == 0)
654 return p->value;
655 p = (struct env *) ecalloc(1, sizeof(struct env));
656 p->name = save(capname);
657 p->value = (char *) ecalloc(strlen(capname)+3, sizeof(char));
658 sprintf(p->value, "<%s>", capname);
659 p->next = envs;
660 envs = p;
661 return p->value;
662 }
663 SNPRINTF1(name, sizeof(name), "LESS_TERMCAP_%s", capname);
664 return (lgetenv(name));
665 }
666
667 static int
ltgetflag(capname)668 ltgetflag(capname)
669 char *capname;
670 {
671 char *s;
672
673 if ((s = ltget_env(capname)) != NULL)
674 return (*s != '\0' && *s != '0');
675 if (hardcopy)
676 return (0);
677 return (tgetflag(capname));
678 }
679
680 static int
ltgetnum(capname)681 ltgetnum(capname)
682 char *capname;
683 {
684 char *s;
685
686 if ((s = ltget_env(capname)) != NULL)
687 return (atoi(s));
688 if (hardcopy)
689 return (-1);
690 return (tgetnum(capname));
691 }
692
693 static char *
ltgetstr(capname,pp)694 ltgetstr(capname, pp)
695 char *capname;
696 char **pp;
697 {
698 char *s;
699
700 if ((s = ltget_env(capname)) != NULL)
701 return (s);
702 if (hardcopy)
703 return (NULL);
704 return (tgetstr(capname, pp));
705 }
706 #endif /* MSDOS_COMPILER */
707
708 /*
709 * Get size of the output screen.
710 */
711 public void
scrsize(VOID_PARAM)712 scrsize(VOID_PARAM)
713 {
714 char *s;
715 int sys_height;
716 int sys_width;
717 #if !MSDOS_COMPILER
718 int n;
719 #endif
720
721 #define DEF_SC_WIDTH 80
722 #if MSDOS_COMPILER
723 #define DEF_SC_HEIGHT 25
724 #else
725 #define DEF_SC_HEIGHT 24
726 #endif
727
728
729 sys_width = sys_height = 0;
730
731 #if MSDOS_COMPILER==MSOFTC
732 {
733 struct videoconfig w;
734 _getvideoconfig(&w);
735 sys_height = w.numtextrows;
736 sys_width = w.numtextcols;
737 }
738 #else
739 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
740 {
741 struct text_info w;
742 gettextinfo(&w);
743 sys_height = w.screenheight;
744 sys_width = w.screenwidth;
745 }
746 #else
747 #if MSDOS_COMPILER==WIN32C
748 {
749 CONSOLE_SCREEN_BUFFER_INFO scr;
750 GetConsoleScreenBufferInfo(con_out, &scr);
751 sys_height = scr.srWindow.Bottom - scr.srWindow.Top + 1;
752 sys_width = scr.srWindow.Right - scr.srWindow.Left + 1;
753 }
754 #else
755 #if OS2
756 {
757 int s[2];
758 _scrsize(s);
759 sys_width = s[0];
760 sys_height = s[1];
761 /*
762 * When using terminal emulators for XFree86/OS2, the
763 * _scrsize function does not work well.
764 * Call the scrsize.exe program to get the window size.
765 */
766 windowid = getenv("WINDOWID");
767 if (windowid != NULL)
768 {
769 FILE *fd = popen("scrsize", "rt");
770 if (fd != NULL)
771 {
772 int w, h;
773 fscanf(fd, "%i %i", &w, &h);
774 if (w > 0 && h > 0)
775 {
776 sys_width = w;
777 sys_height = h;
778 }
779 pclose(fd);
780 }
781 }
782 }
783 #else
784 #ifdef TIOCGWINSZ
785 {
786 struct winsize w;
787 if (ioctl(2, TIOCGWINSZ, &w) == 0)
788 {
789 if (w.ws_row > 0)
790 sys_height = w.ws_row;
791 if (w.ws_col > 0)
792 sys_width = w.ws_col;
793 }
794 }
795 #else
796 #ifdef WIOCGETD
797 {
798 struct uwdata w;
799 if (ioctl(2, WIOCGETD, &w) == 0)
800 {
801 if (w.uw_height > 0)
802 sys_height = w.uw_height / w.uw_vs;
803 if (w.uw_width > 0)
804 sys_width = w.uw_width / w.uw_hs;
805 }
806 }
807 #endif
808 #endif
809 #endif
810 #endif
811 #endif
812 #endif
813
814 if (sys_height > 0)
815 sc_height = sys_height;
816 else if ((s = lgetenv("LINES")) != NULL)
817 sc_height = atoi(s);
818 #if !MSDOS_COMPILER
819 else if ((n = ltgetnum("li")) > 0)
820 sc_height = n;
821 #endif
822 if (sc_height <= 0)
823 sc_height = DEF_SC_HEIGHT;
824
825 if (sys_width > 0)
826 sc_width = sys_width;
827 else if ((s = lgetenv("COLUMNS")) != NULL)
828 sc_width = atoi(s);
829 #if !MSDOS_COMPILER
830 else if ((n = ltgetnum("co")) > 0)
831 sc_width = n;
832 #endif
833 if (sc_width <= 0)
834 sc_width = DEF_SC_WIDTH;
835 }
836
837 #if MSDOS_COMPILER==MSOFTC
838 /*
839 * Figure out how many empty loops it takes to delay a millisecond.
840 */
841 static void
get_clock(VOID_PARAM)842 get_clock(VOID_PARAM)
843 {
844 clock_t start;
845
846 /*
847 * Get synchronized at the start of a tick.
848 */
849 start = clock();
850 while (clock() == start)
851 ;
852 /*
853 * Now count loops till the next tick.
854 */
855 start = clock();
856 msec_loops = 0;
857 while (clock() == start)
858 msec_loops++;
859 /*
860 * Convert from (loops per clock) to (loops per millisecond).
861 */
862 msec_loops *= CLOCKS_PER_SEC;
863 msec_loops /= 1000;
864 }
865
866 /*
867 * Delay for a specified number of milliseconds.
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 (void) clock();
879 }
880 }
881 #endif
882
883 /*
884 * Return the characters actually input by a "special" key.
885 */
886 public char *
special_key_str(key)887 special_key_str(key)
888 int key;
889 {
890 static char tbuf[40];
891 char *s;
892 #if MSDOS_COMPILER || OS2
893 static char k_right[] = { '\340', PCK_RIGHT, 0 };
894 static char k_left[] = { '\340', PCK_LEFT, 0 };
895 static char k_ctl_right[] = { '\340', PCK_CTL_RIGHT, 0 };
896 static char k_ctl_left[] = { '\340', PCK_CTL_LEFT, 0 };
897 static char k_insert[] = { '\340', PCK_INSERT, 0 };
898 static char k_delete[] = { '\340', PCK_DELETE, 0 };
899 static char k_ctl_delete[] = { '\340', PCK_CTL_DELETE, 0 };
900 static char k_ctl_backspace[] = { '\177', 0 };
901 static char k_home[] = { '\340', PCK_HOME, 0 };
902 static char k_end[] = { '\340', PCK_END, 0 };
903 static char k_up[] = { '\340', PCK_UP, 0 };
904 static char k_down[] = { '\340', PCK_DOWN, 0 };
905 static char k_backtab[] = { '\340', PCK_SHIFT_TAB, 0 };
906 static char k_pagedown[] = { '\340', PCK_PAGEDOWN, 0 };
907 static char k_pageup[] = { '\340', PCK_PAGEUP, 0 };
908 static char k_f1[] = { '\340', PCK_F1, 0 };
909 #endif
910 #if !MSDOS_COMPILER
911 char *sp = tbuf;
912 #endif
913
914 switch (key)
915 {
916 #if OS2
917 /*
918 * If windowid is not NULL, assume less is executed in
919 * the XFree86 environment.
920 */
921 case SK_RIGHT_ARROW:
922 s = windowid ? ltgetstr("kr", &sp) : k_right;
923 break;
924 case SK_LEFT_ARROW:
925 s = windowid ? ltgetstr("kl", &sp) : k_left;
926 break;
927 case SK_UP_ARROW:
928 s = windowid ? ltgetstr("ku", &sp) : k_up;
929 break;
930 case SK_DOWN_ARROW:
931 s = windowid ? ltgetstr("kd", &sp) : k_down;
932 break;
933 case SK_PAGE_UP:
934 s = windowid ? ltgetstr("kP", &sp) : k_pageup;
935 break;
936 case SK_PAGE_DOWN:
937 s = windowid ? ltgetstr("kN", &sp) : k_pagedown;
938 break;
939 case SK_HOME:
940 s = windowid ? ltgetstr("kh", &sp) : k_home;
941 break;
942 case SK_END:
943 s = windowid ? ltgetstr("@7", &sp) : k_end;
944 break;
945 case SK_DELETE:
946 s = windowid ? ltgetstr("kD", &sp) : k_delete;
947 if (s == NULL)
948 {
949 tbuf[0] = '\177';
950 tbuf[1] = '\0';
951 s = tbuf;
952 }
953 break;
954 #endif
955 #if MSDOS_COMPILER
956 case SK_RIGHT_ARROW:
957 s = k_right;
958 break;
959 case SK_LEFT_ARROW:
960 s = k_left;
961 break;
962 case SK_UP_ARROW:
963 s = k_up;
964 break;
965 case SK_DOWN_ARROW:
966 s = k_down;
967 break;
968 case SK_PAGE_UP:
969 s = k_pageup;
970 break;
971 case SK_PAGE_DOWN:
972 s = k_pagedown;
973 break;
974 case SK_HOME:
975 s = k_home;
976 break;
977 case SK_END:
978 s = k_end;
979 break;
980 case SK_DELETE:
981 s = k_delete;
982 break;
983 #endif
984 #if MSDOS_COMPILER || OS2
985 case SK_INSERT:
986 s = k_insert;
987 break;
988 case SK_CTL_LEFT_ARROW:
989 s = k_ctl_left;
990 break;
991 case SK_CTL_RIGHT_ARROW:
992 s = k_ctl_right;
993 break;
994 case SK_CTL_BACKSPACE:
995 s = k_ctl_backspace;
996 break;
997 case SK_CTL_DELETE:
998 s = k_ctl_delete;
999 break;
1000 case SK_F1:
1001 s = k_f1;
1002 break;
1003 case SK_BACKTAB:
1004 s = k_backtab;
1005 break;
1006 #else
1007 case SK_RIGHT_ARROW:
1008 s = ltgetstr("kr", &sp);
1009 break;
1010 case SK_LEFT_ARROW:
1011 s = ltgetstr("kl", &sp);
1012 break;
1013 case SK_UP_ARROW:
1014 s = ltgetstr("ku", &sp);
1015 break;
1016 case SK_DOWN_ARROW:
1017 s = ltgetstr("kd", &sp);
1018 break;
1019 case SK_PAGE_UP:
1020 s = ltgetstr("kP", &sp);
1021 break;
1022 case SK_PAGE_DOWN:
1023 s = ltgetstr("kN", &sp);
1024 break;
1025 case SK_HOME:
1026 s = ltgetstr("kh", &sp);
1027 break;
1028 case SK_END:
1029 s = ltgetstr("@7", &sp);
1030 break;
1031 case SK_DELETE:
1032 s = ltgetstr("kD", &sp);
1033 if (s == NULL)
1034 {
1035 tbuf[0] = '\177';
1036 tbuf[1] = '\0';
1037 s = tbuf;
1038 }
1039 break;
1040 #endif
1041 case SK_CONTROL_K:
1042 tbuf[0] = CONTROL('K');
1043 tbuf[1] = '\0';
1044 s = tbuf;
1045 break;
1046 default:
1047 return (NULL);
1048 }
1049 return (s);
1050 }
1051
1052 /*
1053 * Get terminal capabilities via termcap.
1054 */
1055 public void
get_term(VOID_PARAM)1056 get_term(VOID_PARAM)
1057 {
1058 termcap_debug = !isnullenv(lgetenv("LESS_TERMCAP_DEBUG"));
1059 #if MSDOS_COMPILER
1060 auto_wrap = 1;
1061 ignaw = 0;
1062 can_goto_line = 1;
1063 clear_bg = 1;
1064 /*
1065 * Set up default colors.
1066 * The xx_s_width and xx_e_width vars are already initialized to 0.
1067 */
1068 #if MSDOS_COMPILER==MSOFTC
1069 sy_bg_color = _getbkcolor();
1070 sy_fg_color = _gettextcolor();
1071 get_clock();
1072 #else
1073 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1074 {
1075 struct text_info w;
1076 gettextinfo(&w);
1077 sy_bg_color = (w.attribute >> 4) & 0x0F;
1078 sy_fg_color = (w.attribute >> 0) & 0x0F;
1079 }
1080 #else
1081 #if MSDOS_COMPILER==WIN32C
1082 {
1083 DWORD nread;
1084 CONSOLE_SCREEN_BUFFER_INFO scr;
1085
1086 con_out_save = con_out = GetStdHandle(STD_OUTPUT_HANDLE);
1087 /*
1088 * Always open stdin in binary. Note this *must* be done
1089 * before any file operations have been done on fd0.
1090 */
1091 SET_BINARY(0);
1092 GetConsoleScreenBufferInfo(con_out, &scr);
1093 ReadConsoleOutputAttribute(con_out, &curr_attr,
1094 1, scr.dwCursorPosition, &nread);
1095 sy_bg_color = (curr_attr & BG_COLORS) >> 4; /* normalize */
1096 sy_fg_color = curr_attr & FG_COLORS;
1097 }
1098 #endif
1099 #endif
1100 #endif
1101 nm_fg_color = sy_fg_color;
1102 nm_bg_color = sy_bg_color;
1103 bo_fg_color = 11;
1104 bo_bg_color = 0;
1105 ul_fg_color = 9;
1106 ul_bg_color = 0;
1107 so_fg_color = 15;
1108 so_bg_color = 9;
1109 bl_fg_color = 15;
1110 bl_bg_color = 0;
1111 sgr_mode = 0;
1112
1113 /*
1114 * Get size of the screen.
1115 */
1116 scrsize();
1117 pos_init();
1118
1119
1120 #else /* !MSDOS_COMPILER */
1121 {
1122 char *sp;
1123 char *t1, *t2;
1124 char *term;
1125 char termbuf[TERMBUF_SIZE];
1126
1127 static char sbuf[TERMSBUF_SIZE];
1128
1129 #if OS2
1130 /*
1131 * Make sure the termcap database is available.
1132 */
1133 sp = lgetenv("TERMCAP");
1134 if (isnullenv(sp))
1135 {
1136 char *termcap;
1137 if ((sp = homefile("termcap.dat")) != NULL)
1138 {
1139 termcap = (char *) ecalloc(strlen(sp)+9, sizeof(char));
1140 sprintf(termcap, "TERMCAP=%s", sp);
1141 free(sp);
1142 putenv(termcap);
1143 }
1144 }
1145 #endif
1146 /*
1147 * Find out what kind of terminal this is.
1148 */
1149 if ((term = lgetenv("TERM")) == NULL)
1150 term = DEFAULT_TERM;
1151 hardcopy = 0;
1152 if (tgetent(termbuf, term) != TGETENT_OK)
1153 hardcopy = 1;
1154 if (ltgetflag("hc"))
1155 hardcopy = 1;
1156
1157 /*
1158 * Get size of the screen.
1159 */
1160 scrsize();
1161 pos_init();
1162
1163 auto_wrap = ltgetflag("am");
1164 ignaw = ltgetflag("xn");
1165 above_mem = ltgetflag("da");
1166 below_mem = ltgetflag("db");
1167 clear_bg = ltgetflag("ut");
1168
1169 /*
1170 * Assumes termcap variable "sg" is the printing width of:
1171 * the standout sequence, the end standout sequence,
1172 * the underline sequence, the end underline sequence,
1173 * the boldface sequence, and the end boldface sequence.
1174 */
1175 if ((so_s_width = ltgetnum("sg")) < 0)
1176 so_s_width = 0;
1177 so_e_width = so_s_width;
1178
1179 bo_s_width = bo_e_width = so_s_width;
1180 ul_s_width = ul_e_width = so_s_width;
1181 bl_s_width = bl_e_width = so_s_width;
1182
1183 #if HILITE_SEARCH
1184 if (so_s_width > 0 || so_e_width > 0)
1185 /*
1186 * Disable highlighting by default on magic cookie terminals.
1187 * Turning on highlighting might change the displayed width
1188 * of a line, causing the display to get messed up.
1189 * The user can turn it back on with -g,
1190 * but she won't like the results.
1191 */
1192 hilite_search = 0;
1193 #endif
1194
1195 /*
1196 * Get various string-valued capabilities.
1197 */
1198 sp = sbuf;
1199
1200 #if HAVE_OSPEED
1201 sc_pad = ltgetstr("pc", &sp);
1202 if (sc_pad != NULL)
1203 PC = *sc_pad;
1204 #endif
1205
1206 sc_s_keypad = ltgetstr("ks", &sp);
1207 if (sc_s_keypad == NULL)
1208 sc_s_keypad = "";
1209 sc_e_keypad = ltgetstr("ke", &sp);
1210 if (sc_e_keypad == NULL)
1211 sc_e_keypad = "";
1212 kent = ltgetstr("@8", &sp);
1213
1214 sc_s_mousecap = ltgetstr("MOUSE_START", &sp);
1215 if (sc_s_mousecap == NULL)
1216 sc_s_mousecap = ESCS "[?1000h" ESCS "[?1006h";
1217 sc_e_mousecap = ltgetstr("MOUSE_END", &sp);
1218 if (sc_e_mousecap == NULL)
1219 sc_e_mousecap = ESCS "[?1006l" ESCS "[?1000l";
1220
1221 sc_init = ltgetstr("ti", &sp);
1222 if (sc_init == NULL)
1223 sc_init = "";
1224
1225 sc_deinit= ltgetstr("te", &sp);
1226 if (sc_deinit == NULL)
1227 sc_deinit = "";
1228
1229 sc_eol_clear = ltgetstr("ce", &sp);
1230 if (sc_eol_clear == NULL || *sc_eol_clear == '\0')
1231 {
1232 missing_cap = 1;
1233 sc_eol_clear = "";
1234 }
1235
1236 sc_eos_clear = ltgetstr("cd", &sp);
1237 if (below_mem && (sc_eos_clear == NULL || *sc_eos_clear == '\0'))
1238 {
1239 missing_cap = 1;
1240 sc_eos_clear = "";
1241 }
1242
1243 sc_clear = ltgetstr("cl", &sp);
1244 if (sc_clear == NULL || *sc_clear == '\0')
1245 {
1246 missing_cap = 1;
1247 sc_clear = "\n\n";
1248 }
1249
1250 sc_move = ltgetstr("cm", &sp);
1251 if (sc_move == NULL || *sc_move == '\0')
1252 {
1253 /*
1254 * This is not an error here, because we don't
1255 * always need sc_move.
1256 * We need it only if we don't have home or lower-left.
1257 */
1258 sc_move = "";
1259 can_goto_line = 0;
1260 } else
1261 can_goto_line = 1;
1262
1263 tmodes("so", "se", &sc_s_in, &sc_s_out, "", "", &sp);
1264 tmodes("us", "ue", &sc_u_in, &sc_u_out, sc_s_in, sc_s_out, &sp);
1265 tmodes("md", "me", &sc_b_in, &sc_b_out, sc_s_in, sc_s_out, &sp);
1266 tmodes("mb", "me", &sc_bl_in, &sc_bl_out, sc_s_in, sc_s_out, &sp);
1267
1268 sc_visual_bell = ltgetstr("vb", &sp);
1269 if (sc_visual_bell == NULL)
1270 sc_visual_bell = "";
1271
1272 if (ltgetflag("bs"))
1273 sc_backspace = "\b";
1274 else
1275 {
1276 sc_backspace = ltgetstr("bc", &sp);
1277 if (sc_backspace == NULL || *sc_backspace == '\0')
1278 sc_backspace = "\b";
1279 }
1280
1281 /*
1282 * Choose between using "ho" and "cm" ("home" and "cursor move")
1283 * to move the cursor to the upper left corner of the screen.
1284 */
1285 t1 = ltgetstr("ho", &sp);
1286 if (t1 == NULL)
1287 t1 = "";
1288 if (*sc_move == '\0')
1289 t2 = "";
1290 else
1291 {
1292 strcpy(sp, tgoto(sc_move, 0, 0));
1293 t2 = sp;
1294 sp += strlen(sp) + 1;
1295 }
1296 sc_home = cheaper(t1, t2, "|\b^");
1297
1298 /*
1299 * Choose between using "ll" and "cm" ("lower left" and "cursor move")
1300 * to move the cursor to the lower left corner of the screen.
1301 */
1302 t1 = ltgetstr("ll", &sp);
1303 if (t1 == NULL)
1304 t1 = "";
1305 if (*sc_move == '\0')
1306 t2 = "";
1307 else
1308 {
1309 strcpy(sp, tgoto(sc_move, 0, sc_height-1));
1310 t2 = sp;
1311 sp += strlen(sp) + 1;
1312 }
1313 sc_lower_left = cheaper(t1, t2, "\r");
1314
1315 /*
1316 * Get carriage return string.
1317 */
1318 sc_return = ltgetstr("cr", &sp);
1319 if (sc_return == NULL)
1320 sc_return = "\r";
1321
1322 /*
1323 * Choose between using "al" or "sr" ("add line" or "scroll reverse")
1324 * to add a line at the top of the screen.
1325 */
1326 t1 = ltgetstr("al", &sp);
1327 if (t1 == NULL)
1328 t1 = "";
1329 t2 = ltgetstr("sr", &sp);
1330 if (t2 == NULL)
1331 t2 = "";
1332 #if OS2
1333 if (*t1 == '\0' && *t2 == '\0')
1334 sc_addline = "";
1335 else
1336 #endif
1337 if (above_mem)
1338 sc_addline = t1;
1339 else
1340 sc_addline = cheaper(t1, t2, "");
1341 if (*sc_addline == '\0')
1342 {
1343 /*
1344 * Force repaint on any backward movement.
1345 */
1346 no_back_scroll = 1;
1347 }
1348 }
1349 #endif /* MSDOS_COMPILER */
1350 }
1351
1352 #if !MSDOS_COMPILER
1353 /*
1354 * Return the cost of displaying a termcap string.
1355 * We use the trick of calling tputs, but as a char printing function
1356 * we give it inc_costcount, which just increments "costcount".
1357 * This tells us how many chars would be printed by using this string.
1358 * {{ Couldn't we just use strlen? }}
1359 */
1360 static int costcount;
1361
1362 /*ARGSUSED*/
1363 static int
inc_costcount(c)1364 inc_costcount(c)
1365 int c;
1366 {
1367 costcount++;
1368 return (c);
1369 }
1370
1371 static int
cost(t)1372 cost(t)
1373 char *t;
1374 {
1375 costcount = 0;
1376 tputs(t, sc_height, inc_costcount);
1377 return (costcount);
1378 }
1379
1380 /*
1381 * Return the "best" of the two given termcap strings.
1382 * The best, if both exist, is the one with the lower
1383 * cost (see cost() function).
1384 */
1385 static char *
cheaper(t1,t2,def)1386 cheaper(t1, t2, def)
1387 char *t1, *t2;
1388 char *def;
1389 {
1390 if (*t1 == '\0' && *t2 == '\0')
1391 {
1392 missing_cap = 1;
1393 return (def);
1394 }
1395 if (*t1 == '\0')
1396 return (t2);
1397 if (*t2 == '\0')
1398 return (t1);
1399 if (cost(t1) < cost(t2))
1400 return (t1);
1401 return (t2);
1402 }
1403
1404 static void
tmodes(incap,outcap,instr,outstr,def_instr,def_outstr,spp)1405 tmodes(incap, outcap, instr, outstr, def_instr, def_outstr, spp)
1406 char *incap;
1407 char *outcap;
1408 char **instr;
1409 char **outstr;
1410 char *def_instr;
1411 char *def_outstr;
1412 char **spp;
1413 {
1414 *instr = ltgetstr(incap, spp);
1415 if (*instr == NULL)
1416 {
1417 /* Use defaults. */
1418 *instr = def_instr;
1419 *outstr = def_outstr;
1420 return;
1421 }
1422
1423 *outstr = ltgetstr(outcap, spp);
1424 if (*outstr == NULL)
1425 /* No specific out capability; use "me". */
1426 *outstr = ltgetstr("me", spp);
1427 if (*outstr == NULL)
1428 /* Don't even have "me"; use a null string. */
1429 *outstr = "";
1430 }
1431
1432 #endif /* MSDOS_COMPILER */
1433
1434
1435 /*
1436 * Below are the functions which perform all the
1437 * terminal-specific screen manipulation.
1438 */
1439
1440
1441 #if MSDOS_COMPILER
1442
1443 #if MSDOS_COMPILER==WIN32C
1444 static void
_settextposition(int row,int col)1445 _settextposition(int row, int col)
1446 {
1447 COORD cpos;
1448 CONSOLE_SCREEN_BUFFER_INFO csbi;
1449
1450 GetConsoleScreenBufferInfo(con_out, &csbi);
1451 cpos.X = csbi.srWindow.Left + (col - 1);
1452 cpos.Y = csbi.srWindow.Top + (row - 1);
1453 SetConsoleCursorPosition(con_out, cpos);
1454 }
1455 #endif
1456
1457 /*
1458 * Initialize the screen to the correct color at startup.
1459 */
1460 static void
initcolor(VOID_PARAM)1461 initcolor(VOID_PARAM)
1462 {
1463 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1464 intensevideo();
1465 #endif
1466 SETCOLORS(nm_fg_color, nm_bg_color);
1467 #if 0
1468 /*
1469 * This clears the screen at startup. This is different from
1470 * the behavior of other versions of less. Disable it for now.
1471 */
1472 char *blanks;
1473 int row;
1474 int col;
1475
1476 /*
1477 * Create a complete, blank screen using "normal" colors.
1478 */
1479 SETCOLORS(nm_fg_color, nm_bg_color);
1480 blanks = (char *) ecalloc(width+1, sizeof(char));
1481 for (col = 0; col < sc_width; col++)
1482 blanks[col] = ' ';
1483 blanks[sc_width] = '\0';
1484 for (row = 0; row < sc_height; row++)
1485 _outtext(blanks);
1486 free(blanks);
1487 #endif
1488 }
1489 #endif
1490
1491 #if MSDOS_COMPILER==WIN32C
1492
1493 /*
1494 * Termcap-like init with a private win32 console.
1495 */
1496 static void
win32_init_term(VOID_PARAM)1497 win32_init_term(VOID_PARAM)
1498 {
1499 CONSOLE_SCREEN_BUFFER_INFO scr;
1500 COORD size;
1501
1502 if (con_out_save == INVALID_HANDLE_VALUE)
1503 return;
1504
1505 GetConsoleScreenBufferInfo(con_out_save, &scr);
1506
1507 if (con_out_ours == INVALID_HANDLE_VALUE)
1508 {
1509 DWORD output_mode;
1510
1511 /*
1512 * Create our own screen buffer, so that we
1513 * may restore the original when done.
1514 */
1515 con_out_ours = CreateConsoleScreenBuffer(
1516 GENERIC_WRITE | GENERIC_READ,
1517 FILE_SHARE_WRITE | FILE_SHARE_READ,
1518 (LPSECURITY_ATTRIBUTES) NULL,
1519 CONSOLE_TEXTMODE_BUFFER,
1520 (LPVOID) NULL);
1521 /*
1522 * Enable underline, if available.
1523 */
1524 GetConsoleMode(con_out_ours, &output_mode);
1525 have_ul = SetConsoleMode(con_out_ours,
1526 output_mode | ENABLE_VIRTUAL_TERMINAL_PROCESSING);
1527 }
1528
1529 size.X = scr.srWindow.Right - scr.srWindow.Left + 1;
1530 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1;
1531 SetConsoleScreenBufferSize(con_out_ours, size);
1532 SetConsoleActiveScreenBuffer(con_out_ours);
1533 con_out = con_out_ours;
1534 }
1535
1536 /*
1537 * Restore the startup console.
1538 */
1539 static void
win32_deinit_term(VOID_PARAM)1540 win32_deinit_term(VOID_PARAM)
1541 {
1542 if (con_out_save == INVALID_HANDLE_VALUE)
1543 return;
1544 if (quitting)
1545 (void) CloseHandle(con_out_ours);
1546 SetConsoleActiveScreenBuffer(con_out_save);
1547 con_out = con_out_save;
1548 }
1549
1550 #endif
1551
1552 /*
1553 * Configure the termimal so mouse clicks and wheel moves
1554 * produce input to less.
1555 */
1556 public void
init_mouse(VOID_PARAM)1557 init_mouse(VOID_PARAM)
1558 {
1559 if (!mousecap)
1560 return;
1561 #if !MSDOS_COMPILER
1562 tputs(sc_s_mousecap, sc_height, putchr);
1563 #else
1564 #if MSDOS_COMPILER==WIN32C
1565 SetConsoleMode(tty, ENABLE_PROCESSED_INPUT | ENABLE_MOUSE_INPUT);
1566 #endif
1567 #endif
1568 }
1569
1570 /*
1571 * Configure the terminal so mouse clicks and wheel moves
1572 * are handled by the system (so text can be selected, etc).
1573 */
1574 public void
deinit_mouse(VOID_PARAM)1575 deinit_mouse(VOID_PARAM)
1576 {
1577 if (!mousecap)
1578 return;
1579 #if !MSDOS_COMPILER
1580 tputs(sc_e_mousecap, sc_height, putchr);
1581 #else
1582 #if MSDOS_COMPILER==WIN32C
1583 SetConsoleMode(tty, ENABLE_PROCESSED_INPUT);
1584 #endif
1585 #endif
1586 }
1587
1588 /*
1589 * Initialize terminal
1590 */
1591 public void
init(VOID_PARAM)1592 init(VOID_PARAM)
1593 {
1594 #if !MSDOS_COMPILER
1595 if (!(quit_if_one_screen && one_screen))
1596 {
1597 if (!no_init)
1598 tputs(sc_init, sc_height, putchr);
1599 if (!no_keypad)
1600 tputs(sc_s_keypad, sc_height, putchr);
1601 init_mouse();
1602 }
1603 if (top_scroll)
1604 {
1605 int i;
1606
1607 /*
1608 * This is nice to terminals with no alternate screen,
1609 * but with saved scrolled-off-the-top lines. This way,
1610 * no previous line is lost, but we start with a whole
1611 * screen to ourself.
1612 */
1613 for (i = 1; i < sc_height; i++)
1614 putchr('\n');
1615 } else
1616 line_left();
1617 #else
1618 #if MSDOS_COMPILER==WIN32C
1619 if (!no_init)
1620 win32_init_term();
1621 #endif
1622 initcolor();
1623 flush();
1624 #endif
1625 init_done = 1;
1626 }
1627
1628 /*
1629 * Deinitialize terminal
1630 */
1631 public void
deinit(VOID_PARAM)1632 deinit(VOID_PARAM)
1633 {
1634 if (!init_done)
1635 return;
1636 #if !MSDOS_COMPILER
1637 if (!(quit_if_one_screen && one_screen))
1638 {
1639 deinit_mouse();
1640 if (!no_keypad)
1641 tputs(sc_e_keypad, sc_height, putchr);
1642 if (!no_init)
1643 tputs(sc_deinit, sc_height, putchr);
1644 }
1645 #else
1646 /* Restore system colors. */
1647 SETCOLORS(sy_fg_color, sy_bg_color);
1648 #if MSDOS_COMPILER==WIN32C
1649 if (!no_init)
1650 win32_deinit_term();
1651 #else
1652 /* Need clreol to make SETCOLORS take effect. */
1653 clreol();
1654 #endif
1655 #endif
1656 init_done = 0;
1657 }
1658
1659 /*
1660 * Home cursor (move to upper left corner of screen).
1661 */
1662 public void
home(VOID_PARAM)1663 home(VOID_PARAM)
1664 {
1665 #if !MSDOS_COMPILER
1666 tputs(sc_home, 1, putchr);
1667 #else
1668 flush();
1669 _settextposition(1,1);
1670 #endif
1671 }
1672
1673 /*
1674 * Add a blank line (called with cursor at home).
1675 * Should scroll the display down.
1676 */
1677 public void
add_line(VOID_PARAM)1678 add_line(VOID_PARAM)
1679 {
1680 #if !MSDOS_COMPILER
1681 tputs(sc_addline, sc_height, putchr);
1682 #else
1683 flush();
1684 #if MSDOS_COMPILER==MSOFTC
1685 _scrolltextwindow(_GSCROLLDOWN);
1686 _settextposition(1,1);
1687 #else
1688 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1689 movetext(1,1, sc_width,sc_height-1, 1,2);
1690 gotoxy(1,1);
1691 clreol();
1692 #else
1693 #if MSDOS_COMPILER==WIN32C
1694 {
1695 CHAR_INFO fillchar;
1696 SMALL_RECT rcSrc, rcClip;
1697 COORD new_org;
1698 CONSOLE_SCREEN_BUFFER_INFO csbi;
1699
1700 GetConsoleScreenBufferInfo(con_out,&csbi);
1701
1702 /* The clip rectangle is the entire visible screen. */
1703 rcClip.Left = csbi.srWindow.Left;
1704 rcClip.Top = csbi.srWindow.Top;
1705 rcClip.Right = csbi.srWindow.Right;
1706 rcClip.Bottom = csbi.srWindow.Bottom;
1707
1708 /* The source rectangle is the visible screen minus the last line. */
1709 rcSrc = rcClip;
1710 rcSrc.Bottom--;
1711
1712 /* Move the top left corner of the source window down one row. */
1713 new_org.X = rcSrc.Left;
1714 new_org.Y = rcSrc.Top + 1;
1715
1716 /* Fill the right character and attributes. */
1717 fillchar.Char.AsciiChar = ' ';
1718 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
1719 fillchar.Attributes = curr_attr;
1720 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar);
1721 _settextposition(1,1);
1722 }
1723 #endif
1724 #endif
1725 #endif
1726 #endif
1727 }
1728
1729 #if 0
1730 /*
1731 * Remove the n topmost lines and scroll everything below it in the
1732 * window upward. This is needed to stop leaking the topmost line
1733 * into the scrollback buffer when we go down-one-line (in WIN32).
1734 */
1735 public void
1736 remove_top(n)
1737 int n;
1738 {
1739 #if MSDOS_COMPILER==WIN32C
1740 SMALL_RECT rcSrc, rcClip;
1741 CHAR_INFO fillchar;
1742 COORD new_org;
1743 CONSOLE_SCREEN_BUFFER_INFO csbi; /* to get buffer info */
1744
1745 if (n >= sc_height - 1)
1746 {
1747 clear();
1748 home();
1749 return;
1750 }
1751
1752 flush();
1753
1754 GetConsoleScreenBufferInfo(con_out, &csbi);
1755
1756 /* Get the extent of all-visible-rows-but-the-last. */
1757 rcSrc.Left = csbi.srWindow.Left;
1758 rcSrc.Top = csbi.srWindow.Top + n;
1759 rcSrc.Right = csbi.srWindow.Right;
1760 rcSrc.Bottom = csbi.srWindow.Bottom;
1761
1762 /* Get the clip rectangle. */
1763 rcClip.Left = rcSrc.Left;
1764 rcClip.Top = csbi.srWindow.Top;
1765 rcClip.Right = rcSrc.Right;
1766 rcClip.Bottom = rcSrc.Bottom ;
1767
1768 /* Move the source window up n rows. */
1769 new_org.X = rcSrc.Left;
1770 new_org.Y = rcSrc.Top - n;
1771
1772 /* Fill the right character and attributes. */
1773 fillchar.Char.AsciiChar = ' ';
1774 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
1775 fillchar.Attributes = curr_attr;
1776
1777 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar);
1778
1779 /* Position cursor on first blank line. */
1780 goto_line(sc_height - n - 1);
1781 #endif
1782 }
1783 #endif
1784
1785 #if MSDOS_COMPILER==WIN32C
1786 /*
1787 * Clear the screen.
1788 */
1789 static void
win32_clear(VOID_PARAM)1790 win32_clear(VOID_PARAM)
1791 {
1792 /*
1793 * This will clear only the currently visible rows of the NT
1794 * console buffer, which means none of the precious scrollback
1795 * rows are touched making for faster scrolling. Note that, if
1796 * the window has fewer columns than the console buffer (i.e.
1797 * there is a horizontal scrollbar as well), the entire width
1798 * of the visible rows will be cleared.
1799 */
1800 COORD topleft;
1801 DWORD nchars;
1802 DWORD winsz;
1803 CONSOLE_SCREEN_BUFFER_INFO csbi;
1804
1805 /* get the number of cells in the current buffer */
1806 GetConsoleScreenBufferInfo(con_out, &csbi);
1807 winsz = csbi.dwSize.X * (csbi.srWindow.Bottom - csbi.srWindow.Top + 1);
1808 topleft.X = 0;
1809 topleft.Y = csbi.srWindow.Top;
1810
1811 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
1812 FillConsoleOutputCharacter(con_out, ' ', winsz, topleft, &nchars);
1813 FillConsoleOutputAttribute(con_out, curr_attr, winsz, topleft, &nchars);
1814 }
1815
1816 /*
1817 * Remove the n topmost lines and scroll everything below it in the
1818 * window upward.
1819 */
1820 public void
win32_scroll_up(n)1821 win32_scroll_up(n)
1822 int n;
1823 {
1824 SMALL_RECT rcSrc, rcClip;
1825 CHAR_INFO fillchar;
1826 COORD topleft;
1827 COORD new_org;
1828 DWORD nchars;
1829 DWORD size;
1830 CONSOLE_SCREEN_BUFFER_INFO csbi;
1831
1832 if (n <= 0)
1833 return;
1834
1835 if (n >= sc_height - 1)
1836 {
1837 win32_clear();
1838 _settextposition(1,1);
1839 return;
1840 }
1841
1842 /* Get the extent of what will remain visible after scrolling. */
1843 GetConsoleScreenBufferInfo(con_out, &csbi);
1844 rcSrc.Left = csbi.srWindow.Left;
1845 rcSrc.Top = csbi.srWindow.Top + n;
1846 rcSrc.Right = csbi.srWindow.Right;
1847 rcSrc.Bottom = csbi.srWindow.Bottom;
1848
1849 /* Get the clip rectangle. */
1850 rcClip.Left = rcSrc.Left;
1851 rcClip.Top = csbi.srWindow.Top;
1852 rcClip.Right = rcSrc.Right;
1853 rcClip.Bottom = rcSrc.Bottom ;
1854
1855 /* Move the source text to the top of the screen. */
1856 new_org.X = rcSrc.Left;
1857 new_org.Y = rcClip.Top;
1858
1859 /* Fill the right character and attributes. */
1860 fillchar.Char.AsciiChar = ' ';
1861 fillchar.Attributes = MAKEATTR(nm_fg_color, nm_bg_color);
1862
1863 /* Scroll the window. */
1864 SetConsoleTextAttribute(con_out, fillchar.Attributes);
1865 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar);
1866
1867 /* Clear remaining lines at bottom. */
1868 topleft.X = csbi.dwCursorPosition.X;
1869 topleft.Y = rcSrc.Bottom - n;
1870 size = (n * csbi.dwSize.X) + (rcSrc.Right - topleft.X);
1871 FillConsoleOutputCharacter(con_out, ' ', size, topleft,
1872 &nchars);
1873 FillConsoleOutputAttribute(con_out, fillchar.Attributes, size, topleft,
1874 &nchars);
1875 SetConsoleTextAttribute(con_out, curr_attr);
1876
1877 /* Move cursor n lines up from where it was. */
1878 csbi.dwCursorPosition.Y -= n;
1879 SetConsoleCursorPosition(con_out, csbi.dwCursorPosition);
1880 }
1881 #endif
1882
1883 /*
1884 * Move cursor to lower left corner of screen.
1885 */
1886 public void
lower_left(VOID_PARAM)1887 lower_left(VOID_PARAM)
1888 {
1889 if (!init_done)
1890 return;
1891 #if !MSDOS_COMPILER
1892 tputs(sc_lower_left, 1, putchr);
1893 #else
1894 flush();
1895 _settextposition(sc_height, 1);
1896 #endif
1897 }
1898
1899 /*
1900 * Move cursor to left position of current line.
1901 */
1902 public void
line_left(VOID_PARAM)1903 line_left(VOID_PARAM)
1904 {
1905 #if !MSDOS_COMPILER
1906 tputs(sc_return, 1, putchr);
1907 #else
1908 int row;
1909 flush();
1910 #if MSDOS_COMPILER==WIN32C
1911 {
1912 CONSOLE_SCREEN_BUFFER_INFO scr;
1913 GetConsoleScreenBufferInfo(con_out, &scr);
1914 row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1;
1915 }
1916 #else
1917 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1918 row = wherey();
1919 #else
1920 {
1921 struct rccoord tpos = _gettextposition();
1922 row = tpos.row;
1923 }
1924 #endif
1925 #endif
1926 _settextposition(row, 1);
1927 #endif
1928 }
1929
1930 /*
1931 * Check if the console size has changed and reset internals
1932 * (in lieu of SIGWINCH for WIN32).
1933 */
1934 public void
check_winch(VOID_PARAM)1935 check_winch(VOID_PARAM)
1936 {
1937 #if MSDOS_COMPILER==WIN32C
1938 CONSOLE_SCREEN_BUFFER_INFO scr;
1939 COORD size;
1940
1941 if (con_out == INVALID_HANDLE_VALUE)
1942 return;
1943
1944 flush();
1945 GetConsoleScreenBufferInfo(con_out, &scr);
1946 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1;
1947 size.X = scr.srWindow.Right - scr.srWindow.Left + 1;
1948 if (size.Y != sc_height || size.X != sc_width)
1949 {
1950 sc_height = size.Y;
1951 sc_width = size.X;
1952 if (!no_init && con_out_ours == con_out)
1953 SetConsoleScreenBufferSize(con_out, size);
1954 pos_init();
1955 wscroll = (sc_height + 1) / 2;
1956 screen_trashed = 1;
1957 }
1958 #endif
1959 }
1960
1961 /*
1962 * Goto a specific line on the screen.
1963 */
1964 public void
goto_line(sindex)1965 goto_line(sindex)
1966 int sindex;
1967 {
1968 #if !MSDOS_COMPILER
1969 tputs(tgoto(sc_move, 0, sindex), 1, putchr);
1970 #else
1971 flush();
1972 _settextposition(sindex+1, 1);
1973 #endif
1974 }
1975
1976 #if MSDOS_COMPILER==MSOFTC || MSDOS_COMPILER==BORLANDC
1977 /*
1978 * Create an alternate screen which is all white.
1979 * This screen is used to create a "flash" effect, by displaying it
1980 * briefly and then switching back to the normal screen.
1981 * {{ Yuck! There must be a better way to get a visual bell. }}
1982 */
1983 static void
create_flash(VOID_PARAM)1984 create_flash(VOID_PARAM)
1985 {
1986 #if MSDOS_COMPILER==MSOFTC
1987 struct videoconfig w;
1988 char *blanks;
1989 int row, col;
1990
1991 _getvideoconfig(&w);
1992 videopages = w.numvideopages;
1993 if (videopages < 2)
1994 {
1995 at_enter(AT_STANDOUT);
1996 at_exit();
1997 } else
1998 {
1999 _setactivepage(1);
2000 at_enter(AT_STANDOUT);
2001 blanks = (char *) ecalloc(w.numtextcols, sizeof(char));
2002 for (col = 0; col < w.numtextcols; col++)
2003 blanks[col] = ' ';
2004 for (row = w.numtextrows; row > 0; row--)
2005 _outmem(blanks, w.numtextcols);
2006 _setactivepage(0);
2007 _setvisualpage(0);
2008 free(blanks);
2009 at_exit();
2010 }
2011 #else
2012 #if MSDOS_COMPILER==BORLANDC
2013 int n;
2014
2015 whitescreen = (unsigned short *)
2016 malloc(sc_width * sc_height * sizeof(short));
2017 if (whitescreen == NULL)
2018 return;
2019 for (n = 0; n < sc_width * sc_height; n++)
2020 whitescreen[n] = 0x7020;
2021 #endif
2022 #endif
2023 flash_created = 1;
2024 }
2025 #endif /* MSDOS_COMPILER */
2026
2027 /*
2028 * Output the "visual bell", if there is one.
2029 */
2030 public void
vbell(VOID_PARAM)2031 vbell(VOID_PARAM)
2032 {
2033 #if !MSDOS_COMPILER
2034 if (*sc_visual_bell == '\0')
2035 return;
2036 tputs(sc_visual_bell, sc_height, putchr);
2037 #else
2038 #if MSDOS_COMPILER==DJGPPC
2039 ScreenVisualBell();
2040 #else
2041 #if MSDOS_COMPILER==MSOFTC
2042 /*
2043 * Create a flash screen on the second video page.
2044 * Switch to that page, then switch back.
2045 */
2046 if (!flash_created)
2047 create_flash();
2048 if (videopages < 2)
2049 return;
2050 _setvisualpage(1);
2051 delay(100);
2052 _setvisualpage(0);
2053 #else
2054 #if MSDOS_COMPILER==BORLANDC
2055 unsigned short *currscreen;
2056
2057 /*
2058 * Get a copy of the current screen.
2059 * Display the flash screen.
2060 * Then restore the old screen.
2061 */
2062 if (!flash_created)
2063 create_flash();
2064 if (whitescreen == NULL)
2065 return;
2066 currscreen = (unsigned short *)
2067 malloc(sc_width * sc_height * sizeof(short));
2068 if (currscreen == NULL) return;
2069 gettext(1, 1, sc_width, sc_height, currscreen);
2070 puttext(1, 1, sc_width, sc_height, whitescreen);
2071 delay(100);
2072 puttext(1, 1, sc_width, sc_height, currscreen);
2073 free(currscreen);
2074 #else
2075 #if MSDOS_COMPILER==WIN32C
2076 /* paint screen with an inverse color */
2077 clear();
2078
2079 /* leave it displayed for 100 msec. */
2080 Sleep(100);
2081
2082 /* restore with a redraw */
2083 repaint();
2084 #endif
2085 #endif
2086 #endif
2087 #endif
2088 #endif
2089 }
2090
2091 /*
2092 * Make a noise.
2093 */
2094 static void
beep(VOID_PARAM)2095 beep(VOID_PARAM)
2096 {
2097 #if !MSDOS_COMPILER
2098 putchr(CONTROL('G'));
2099 #else
2100 #if MSDOS_COMPILER==WIN32C
2101 MessageBeep(0);
2102 #else
2103 write(1, "\7", 1);
2104 #endif
2105 #endif
2106 }
2107
2108 /*
2109 * Ring the terminal bell.
2110 */
2111 public void
bell(VOID_PARAM)2112 bell(VOID_PARAM)
2113 {
2114 if (quiet == VERY_QUIET)
2115 vbell();
2116 else
2117 beep();
2118 }
2119
2120 /*
2121 * Clear the screen.
2122 */
2123 public void
clear(VOID_PARAM)2124 clear(VOID_PARAM)
2125 {
2126 #if !MSDOS_COMPILER
2127 tputs(sc_clear, sc_height, putchr);
2128 #else
2129 flush();
2130 #if MSDOS_COMPILER==WIN32C
2131 win32_clear();
2132 #else
2133 _clearscreen(_GCLEARSCREEN);
2134 #endif
2135 #endif
2136 }
2137
2138 /*
2139 * Clear from the cursor to the end of the cursor's line.
2140 * {{ This must not move the cursor. }}
2141 */
2142 public void
clear_eol(VOID_PARAM)2143 clear_eol(VOID_PARAM)
2144 {
2145 #if !MSDOS_COMPILER
2146 tputs(sc_eol_clear, 1, putchr);
2147 #else
2148 #if MSDOS_COMPILER==MSOFTC
2149 short top, left;
2150 short bot, right;
2151 struct rccoord tpos;
2152
2153 flush();
2154 /*
2155 * Save current state.
2156 */
2157 tpos = _gettextposition();
2158 _gettextwindow(&top, &left, &bot, &right);
2159 /*
2160 * Set a temporary window to the current line,
2161 * from the cursor's position to the right edge of the screen.
2162 * Then clear that window.
2163 */
2164 _settextwindow(tpos.row, tpos.col, tpos.row, sc_width);
2165 _clearscreen(_GWINDOW);
2166 /*
2167 * Restore state.
2168 */
2169 _settextwindow(top, left, bot, right);
2170 _settextposition(tpos.row, tpos.col);
2171 #else
2172 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
2173 flush();
2174 clreol();
2175 #else
2176 #if MSDOS_COMPILER==WIN32C
2177 DWORD nchars;
2178 COORD cpos;
2179 CONSOLE_SCREEN_BUFFER_INFO scr;
2180
2181 flush();
2182 memset(&scr, 0, sizeof(scr));
2183 GetConsoleScreenBufferInfo(con_out, &scr);
2184 cpos.X = scr.dwCursorPosition.X;
2185 cpos.Y = scr.dwCursorPosition.Y;
2186 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
2187 FillConsoleOutputAttribute(con_out, curr_attr,
2188 scr.dwSize.X - cpos.X, cpos, &nchars);
2189 FillConsoleOutputCharacter(con_out, ' ',
2190 scr.dwSize.X - cpos.X, cpos, &nchars);
2191 #endif
2192 #endif
2193 #endif
2194 #endif
2195 }
2196
2197 /*
2198 * Clear the current line.
2199 * Clear the screen if there's off-screen memory below the display.
2200 */
2201 static void
clear_eol_bot(VOID_PARAM)2202 clear_eol_bot(VOID_PARAM)
2203 {
2204 #if MSDOS_COMPILER
2205 clear_eol();
2206 #else
2207 if (below_mem)
2208 tputs(sc_eos_clear, 1, putchr);
2209 else
2210 tputs(sc_eol_clear, 1, putchr);
2211 #endif
2212 }
2213
2214 /*
2215 * Clear the bottom line of the display.
2216 * Leave the cursor at the beginning of the bottom line.
2217 */
2218 public void
clear_bot(VOID_PARAM)2219 clear_bot(VOID_PARAM)
2220 {
2221 /*
2222 * If we're in a non-normal attribute mode, temporarily exit
2223 * the mode while we do the clear. Some terminals fill the
2224 * cleared area with the current attribute.
2225 */
2226 if (oldbot)
2227 lower_left();
2228 else
2229 line_left();
2230
2231 if (attrmode == AT_NORMAL)
2232 clear_eol_bot();
2233 else
2234 {
2235 int saved_attrmode = attrmode;
2236
2237 at_exit();
2238 clear_eol_bot();
2239 at_enter(saved_attrmode);
2240 }
2241 }
2242
2243 public void
at_enter(attr)2244 at_enter(attr)
2245 int attr;
2246 {
2247 attr = apply_at_specials(attr);
2248
2249 #if !MSDOS_COMPILER
2250 /* The one with the most priority is last. */
2251 if (attr & AT_UNDERLINE)
2252 tputs(sc_u_in, 1, putchr);
2253 if (attr & AT_BOLD)
2254 tputs(sc_b_in, 1, putchr);
2255 if (attr & AT_BLINK)
2256 tputs(sc_bl_in, 1, putchr);
2257 if (attr & AT_STANDOUT)
2258 tputs(sc_s_in, 1, putchr);
2259 #else
2260 flush();
2261 /* The one with the most priority is first. */
2262 if (attr & AT_STANDOUT)
2263 {
2264 SETCOLORS(so_fg_color, so_bg_color);
2265 } else if (attr & AT_BLINK)
2266 {
2267 SETCOLORS(bl_fg_color, bl_bg_color);
2268 }
2269 else if (attr & AT_BOLD)
2270 {
2271 SETCOLORS(bo_fg_color, bo_bg_color);
2272 }
2273 else if (attr & AT_UNDERLINE)
2274 {
2275 SETCOLORS(ul_fg_color, ul_bg_color);
2276 }
2277 #endif
2278
2279 attrmode = attr;
2280 }
2281
2282 public void
at_exit(VOID_PARAM)2283 at_exit(VOID_PARAM)
2284 {
2285 #if !MSDOS_COMPILER
2286 /* Undo things in the reverse order we did them. */
2287 if (attrmode & AT_STANDOUT)
2288 tputs(sc_s_out, 1, putchr);
2289 if (attrmode & AT_BLINK)
2290 tputs(sc_bl_out, 1, putchr);
2291 if (attrmode & AT_BOLD)
2292 tputs(sc_b_out, 1, putchr);
2293 if (attrmode & AT_UNDERLINE)
2294 tputs(sc_u_out, 1, putchr);
2295 #else
2296 flush();
2297 SETCOLORS(nm_fg_color, nm_bg_color);
2298 #endif
2299
2300 attrmode = AT_NORMAL;
2301 }
2302
2303 public void
at_switch(attr)2304 at_switch(attr)
2305 int attr;
2306 {
2307 int new_attrmode = apply_at_specials(attr);
2308 int ignore_modes = AT_ANSI;
2309
2310 if ((new_attrmode & ~ignore_modes) != (attrmode & ~ignore_modes))
2311 {
2312 at_exit();
2313 at_enter(attr);
2314 }
2315 }
2316
2317 public int
is_at_equiv(attr1,attr2)2318 is_at_equiv(attr1, attr2)
2319 int attr1;
2320 int attr2;
2321 {
2322 attr1 = apply_at_specials(attr1);
2323 attr2 = apply_at_specials(attr2);
2324
2325 return (attr1 == attr2);
2326 }
2327
2328 public int
apply_at_specials(attr)2329 apply_at_specials(attr)
2330 int attr;
2331 {
2332 if (attr & AT_BINARY)
2333 attr |= binattr;
2334 if (attr & AT_HILITE)
2335 attr |= AT_STANDOUT;
2336 attr &= ~(AT_BINARY|AT_HILITE);
2337
2338 return attr;
2339 }
2340
2341 #if 0 /* No longer used */
2342 /*
2343 * Erase the character to the left of the cursor
2344 * and move the cursor left.
2345 */
2346 public void
2347 backspace(VOID_PARAM)
2348 {
2349 #if !MSDOS_COMPILER
2350 /*
2351 * Erase the previous character by overstriking with a space.
2352 */
2353 tputs(sc_backspace, 1, putchr);
2354 putchr(' ');
2355 tputs(sc_backspace, 1, putchr);
2356 #else
2357 #if MSDOS_COMPILER==MSOFTC
2358 struct rccoord tpos;
2359
2360 flush();
2361 tpos = _gettextposition();
2362 if (tpos.col <= 1)
2363 return;
2364 _settextposition(tpos.row, tpos.col-1);
2365 _outtext(" ");
2366 _settextposition(tpos.row, tpos.col-1);
2367 #else
2368 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
2369 cputs("\b");
2370 #else
2371 #if MSDOS_COMPILER==WIN32C
2372 COORD cpos;
2373 DWORD cChars;
2374 CONSOLE_SCREEN_BUFFER_INFO scr;
2375
2376 flush();
2377 GetConsoleScreenBufferInfo(con_out, &scr);
2378 cpos = scr.dwCursorPosition;
2379 if (cpos.X <= 0)
2380 return;
2381 cpos.X--;
2382 SetConsoleCursorPosition(con_out, cpos);
2383 FillConsoleOutputCharacter(con_out, (TCHAR)' ', 1, cpos, &cChars);
2384 SetConsoleCursorPosition(con_out, cpos);
2385 #endif
2386 #endif
2387 #endif
2388 #endif
2389 }
2390 #endif /* 0 */
2391
2392 /*
2393 * Output a plain backspace, without erasing the previous char.
2394 */
2395 public void
putbs(VOID_PARAM)2396 putbs(VOID_PARAM)
2397 {
2398 if (termcap_debug)
2399 putstr("<bs>");
2400 else
2401 {
2402 #if !MSDOS_COMPILER
2403 tputs(sc_backspace, 1, putchr);
2404 #else
2405 int row, col;
2406
2407 flush();
2408 {
2409 #if MSDOS_COMPILER==MSOFTC
2410 struct rccoord tpos;
2411 tpos = _gettextposition();
2412 row = tpos.row;
2413 col = tpos.col;
2414 #else
2415 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
2416 row = wherey();
2417 col = wherex();
2418 #else
2419 #if MSDOS_COMPILER==WIN32C
2420 CONSOLE_SCREEN_BUFFER_INFO scr;
2421 GetConsoleScreenBufferInfo(con_out, &scr);
2422 row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1;
2423 col = scr.dwCursorPosition.X - scr.srWindow.Left + 1;
2424 #endif
2425 #endif
2426 #endif
2427 }
2428 if (col <= 1)
2429 return;
2430 _settextposition(row, col-1);
2431 #endif /* MSDOS_COMPILER */
2432 }
2433 }
2434
2435 #if MSDOS_COMPILER==WIN32C
2436 /*
2437 * Determine whether an input character is waiting to be read.
2438 */
2439 public int
win32_kbhit(VOID_PARAM)2440 win32_kbhit(VOID_PARAM)
2441 {
2442 INPUT_RECORD ip;
2443 DWORD read;
2444
2445 if (keyCount > 0)
2446 return (TRUE);
2447
2448 currentKey.ascii = 0;
2449 currentKey.scan = 0;
2450
2451 if (x11mouseCount > 0)
2452 {
2453 currentKey.ascii = x11mousebuf[x11mousePos++];
2454 --x11mouseCount;
2455 keyCount = 1;
2456 return (TRUE);
2457 }
2458
2459 /*
2460 * Wait for a real key-down event, but
2461 * ignore SHIFT and CONTROL key events.
2462 */
2463 do
2464 {
2465 PeekConsoleInput(tty, &ip, 1, &read);
2466 if (read == 0)
2467 return (FALSE);
2468 ReadConsoleInput(tty, &ip, 1, &read);
2469 /* generate an X11 mouse sequence from the mouse event */
2470 if (mousecap && ip.EventType == MOUSE_EVENT &&
2471 ip.Event.MouseEvent.dwEventFlags != MOUSE_MOVED)
2472 {
2473 x11mousebuf[3] = X11MOUSE_OFFSET + ip.Event.MouseEvent.dwMousePosition.X + 1;
2474 x11mousebuf[4] = X11MOUSE_OFFSET + ip.Event.MouseEvent.dwMousePosition.Y + 1;
2475 switch (ip.Event.MouseEvent.dwEventFlags)
2476 {
2477 case 0: /* press or release */
2478 if (ip.Event.MouseEvent.dwButtonState == 0)
2479 x11mousebuf[2] = X11MOUSE_OFFSET + X11MOUSE_BUTTON_REL;
2480 else if (ip.Event.MouseEvent.dwButtonState & (FROM_LEFT_3RD_BUTTON_PRESSED | FROM_LEFT_4TH_BUTTON_PRESSED))
2481 continue;
2482 else
2483 x11mousebuf[2] = X11MOUSE_OFFSET + X11MOUSE_BUTTON1 + ((int)ip.Event.MouseEvent.dwButtonState << 1);
2484 break;
2485 case MOUSE_WHEELED:
2486 x11mousebuf[2] = X11MOUSE_OFFSET + (((int)ip.Event.MouseEvent.dwButtonState < 0) ? X11MOUSE_WHEEL_DOWN : X11MOUSE_WHEEL_UP);
2487 break;
2488 default:
2489 continue;
2490 }
2491 x11mousePos = 0;
2492 x11mouseCount = 5;
2493 currentKey.ascii = ESC;
2494 keyCount = 1;
2495 return (TRUE);
2496 }
2497 } while (ip.EventType != KEY_EVENT ||
2498 ip.Event.KeyEvent.bKeyDown != TRUE ||
2499 ip.Event.KeyEvent.wVirtualScanCode == 0 ||
2500 ip.Event.KeyEvent.wVirtualKeyCode == VK_SHIFT ||
2501 ip.Event.KeyEvent.wVirtualKeyCode == VK_CONTROL ||
2502 ip.Event.KeyEvent.wVirtualKeyCode == VK_MENU);
2503
2504 currentKey.ascii = ip.Event.KeyEvent.uChar.AsciiChar;
2505 currentKey.scan = ip.Event.KeyEvent.wVirtualScanCode;
2506 keyCount = ip.Event.KeyEvent.wRepeatCount;
2507
2508 if (ip.Event.KeyEvent.dwControlKeyState &
2509 (LEFT_ALT_PRESSED | RIGHT_ALT_PRESSED))
2510 {
2511 switch (currentKey.scan)
2512 {
2513 case PCK_ALT_E: /* letter 'E' */
2514 currentKey.ascii = 0;
2515 break;
2516 }
2517 } else if (ip.Event.KeyEvent.dwControlKeyState &
2518 (LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED))
2519 {
2520 switch (currentKey.scan)
2521 {
2522 case PCK_RIGHT: /* right arrow */
2523 currentKey.scan = PCK_CTL_RIGHT;
2524 break;
2525 case PCK_LEFT: /* left arrow */
2526 currentKey.scan = PCK_CTL_LEFT;
2527 break;
2528 case PCK_DELETE: /* delete */
2529 currentKey.scan = PCK_CTL_DELETE;
2530 break;
2531 }
2532 } else if (ip.Event.KeyEvent.dwControlKeyState & SHIFT_PRESSED)
2533 {
2534 switch (currentKey.scan)
2535 {
2536 case PCK_SHIFT_TAB: /* tab */
2537 currentKey.ascii = 0;
2538 break;
2539 }
2540 }
2541
2542 return (TRUE);
2543 }
2544
2545 /*
2546 * Read a character from the keyboard.
2547 */
2548 public char
WIN32getch(VOID_PARAM)2549 WIN32getch(VOID_PARAM)
2550 {
2551 int ascii;
2552
2553 if (pending_scancode)
2554 {
2555 pending_scancode = 0;
2556 return ((char)(currentKey.scan & 0x00FF));
2557 }
2558
2559 do {
2560 while (win32_kbhit() == FALSE)
2561 {
2562 Sleep(20);
2563 if (ABORT_SIGS())
2564 return ('\003');
2565 continue;
2566 }
2567 keyCount --;
2568 ascii = currentKey.ascii;
2569 /*
2570 * On PC's, the extended keys return a 2 byte sequence beginning
2571 * with '00', so if the ascii code is 00, the next byte will be
2572 * the lsb of the scan code.
2573 */
2574 pending_scancode = (ascii == 0x00);
2575 } while (pending_scancode &&
2576 (currentKey.scan == PCK_CAPS_LOCK || currentKey.scan == PCK_NUM_LOCK));
2577
2578 return ((char)ascii);
2579 }
2580 #endif
2581
2582 #if MSDOS_COMPILER
2583 /*
2584 */
2585 public void
WIN32setcolors(fg,bg)2586 WIN32setcolors(fg, bg)
2587 int fg;
2588 int bg;
2589 {
2590 SETCOLORS(fg, bg);
2591 }
2592
2593 /*
2594 */
2595 public void
WIN32textout(text,len)2596 WIN32textout(text, len)
2597 char *text;
2598 int len;
2599 {
2600 #if MSDOS_COMPILER==WIN32C
2601 DWORD written;
2602 if (utf_mode == 2)
2603 {
2604 /*
2605 * We've got UTF-8 text in a non-UTF-8 console. Convert it to
2606 * wide and use WriteConsoleW.
2607 */
2608 WCHAR wtext[1024];
2609 len = MultiByteToWideChar(CP_UTF8, 0, text, len, wtext,
2610 sizeof(wtext)/sizeof(*wtext));
2611 WriteConsoleW(con_out, wtext, len, &written, NULL);
2612 } else
2613 WriteConsole(con_out, text, len, &written, NULL);
2614 #else
2615 char c = text[len];
2616 text[len] = '\0';
2617 cputs(text);
2618 text[len] = c;
2619 #endif
2620 }
2621 #endif
2622