1 /*
2 * Copyright (C) 1984-2021 Mark Nudelman
3 *
4 * You may distribute under the terms of either the GNU General Public
5 * License or the Less License, as specified in the README file.
6 *
7 * For more information, see the README file.
8 */
9
10
11 /*
12 * Routines which deal with the characteristics of the terminal.
13 * Uses termcap to be as terminal-independent as possible.
14 */
15
16 #include "less.h"
17 #include "cmd.h"
18
19 #if MSDOS_COMPILER
20 #include "pckeys.h"
21 #if MSDOS_COMPILER==MSOFTC
22 #include <graph.h>
23 #else
24 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
25 #include <conio.h>
26 #if MSDOS_COMPILER==DJGPPC
27 #include <pc.h>
28 extern int fd0;
29 #endif
30 #else
31 #if MSDOS_COMPILER==WIN32C
32 #include <windows.h>
33 #endif
34 #endif
35 #endif
36 #include <time.h>
37
38 #ifndef FOREGROUND_BLUE
39 #define FOREGROUND_BLUE 0x0001
40 #endif
41 #ifndef FOREGROUND_GREEN
42 #define FOREGROUND_GREEN 0x0002
43 #endif
44 #ifndef FOREGROUND_RED
45 #define FOREGROUND_RED 0x0004
46 #endif
47 #ifndef FOREGROUND_INTENSITY
48 #define FOREGROUND_INTENSITY 0x0008
49 #endif
50
51 #else
52
53 #if HAVE_SYS_IOCTL_H
54 #include <sys/ioctl.h>
55 #endif
56
57 #if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS
58 #include <termios.h>
59 #else
60 #if HAVE_TERMIO_H
61 #include <termio.h>
62 #else
63 #if HAVE_SGSTAT_H
64 #include <sgstat.h>
65 #else
66 #include <sgtty.h>
67 #endif
68 #endif
69 #endif
70
71 #if HAVE_TERMCAP_H
72 #include <termcap.h>
73 #endif
74 #ifdef _OSK
75 #include <signal.h>
76 #endif
77 #if OS2
78 #include <sys/signal.h>
79 #include "pckeys.h"
80 #endif
81 #if HAVE_SYS_STREAM_H
82 #include <sys/stream.h>
83 #endif
84 #if HAVE_SYS_PTEM_H
85 #include <sys/ptem.h>
86 #endif
87
88 #endif /* MSDOS_COMPILER */
89
90 /*
91 * Check for broken termios package that forces you to manually
92 * set the line discipline.
93 */
94 #ifdef __ultrix__
95 #define MUST_SET_LINE_DISCIPLINE 1
96 #else
97 #define MUST_SET_LINE_DISCIPLINE 0
98 #endif
99
100 #if OS2
101 #define DEFAULT_TERM "ansi"
102 static char *windowid;
103 #else
104 #define DEFAULT_TERM "unknown"
105 #endif
106
107 #if MSDOS_COMPILER==MSOFTC
108 static int videopages;
109 static long msec_loops;
110 static int flash_created = 0;
111 #define SET_FG_COLOR(fg) _settextcolor(fg)
112 #define SET_BG_COLOR(bg) _setbkcolor(bg)
113 #define SETCOLORS(fg,bg) { SET_FG_COLOR(fg); SET_BG_COLOR(bg); }
114 #endif
115
116 #if MSDOS_COMPILER==BORLANDC
117 static unsigned short *whitescreen;
118 static int flash_created = 0;
119 #endif
120 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
121 #define _settextposition(y,x) gotoxy(x,y)
122 #define _clearscreen(m) clrscr()
123 #define _outtext(s) cputs(s)
124 #define SET_FG_COLOR(fg) textcolor(fg)
125 #define SET_BG_COLOR(bg) textbackground(bg)
126 #define SETCOLORS(fg,bg) { SET_FG_COLOR(fg); SET_BG_COLOR(bg); }
127 extern int sc_height;
128 #endif
129
130 #if MSDOS_COMPILER==WIN32C
131 struct keyRecord
132 {
133 int ascii;
134 int scan;
135 } currentKey;
136
137 static int keyCount = 0;
138 static WORD curr_attr;
139 static int pending_scancode = 0;
140 static char x11mousebuf[] = "[M???"; /* Mouse report, after ESC */
141 static int x11mousePos, x11mouseCount;
142
143 static HANDLE con_out_save = INVALID_HANDLE_VALUE; /* previous console */
144 static HANDLE con_out_ours = INVALID_HANDLE_VALUE; /* our own */
145 HANDLE con_out = INVALID_HANDLE_VALUE; /* current console */
146
147 extern int utf_mode;
148 extern int quitting;
149 static void win32_init_term();
150 static void win32_deinit_term();
151
152 #ifndef ENABLE_VIRTUAL_TERMINAL_PROCESSING
153 #define ENABLE_VIRTUAL_TERMINAL_PROCESSING 4
154 #endif
155
156 #define FG_COLORS (FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_INTENSITY)
157 #define BG_COLORS (BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE | BACKGROUND_INTENSITY)
158 #define MAKEATTR(fg,bg) ((WORD)((fg)|((bg)<<4)))
159 #define APPLY_COLORS() { if (SetConsoleTextAttribute(con_out, curr_attr) == 0) \
160 error("SETCOLORS failed", NULL_PARG); }
161 #define SET_FG_COLOR(fg) { curr_attr |= (fg); APPLY_COLORS(); }
162 #define SET_BG_COLOR(bg) { curr_attr |= ((bg)<<4); APPLY_COLORS(); }
163 #define SETCOLORS(fg,bg) { curr_attr = MAKEATTR(fg,bg); APPLY_COLORS(); }
164 #endif
165
166 #if MSDOS_COMPILER
167 public int nm_fg_color; /* Color of normal text */
168 public int nm_bg_color;
169 public int bo_fg_color; /* Color of bold text */
170 public int bo_bg_color;
171 public int ul_fg_color; /* Color of underlined text */
172 public int ul_bg_color;
173 public int so_fg_color; /* Color of standout text */
174 public int so_bg_color;
175 public int bl_fg_color; /* Color of blinking text */
176 public int bl_bg_color;
177 static int sy_fg_color; /* Color of system text (before less) */
178 static int sy_bg_color;
179 public int sgr_mode; /* Honor ANSI sequences rather than using above */
180 #if MSDOS_COMPILER==WIN32C
181 static DWORD init_output_mode; /* The initial console output mode */
182 public int vt_enabled = -1; /* Is virtual terminal processing available? */
183 #endif
184 #else
185
186 /*
187 * Strings passed to tputs() to do various terminal functions.
188 */
189 static char
190 *sc_pad, /* Pad string */
191 *sc_home, /* Cursor home */
192 *sc_addline, /* Add line, scroll down following lines */
193 *sc_lower_left, /* Cursor to last line, first column */
194 *sc_return, /* Cursor to beginning of current line */
195 *sc_move, /* General cursor positioning */
196 *sc_clear, /* Clear screen */
197 *sc_eol_clear, /* Clear to end of line */
198 *sc_eos_clear, /* Clear to end of screen */
199 *sc_s_in, /* Enter standout (highlighted) mode */
200 *sc_s_out, /* Exit standout mode */
201 *sc_u_in, /* Enter underline mode */
202 *sc_u_out, /* Exit underline mode */
203 *sc_b_in, /* Enter bold mode */
204 *sc_b_out, /* Exit bold mode */
205 *sc_bl_in, /* Enter blink mode */
206 *sc_bl_out, /* Exit blink mode */
207 *sc_visual_bell, /* Visual bell (flash screen) sequence */
208 *sc_backspace, /* Backspace cursor */
209 *sc_s_keypad, /* Start keypad mode */
210 *sc_e_keypad, /* End keypad mode */
211 *sc_s_mousecap, /* Start mouse capture mode */
212 *sc_e_mousecap, /* End mouse capture mode */
213 *sc_init, /* Startup terminal initialization */
214 *sc_deinit; /* Exit terminal de-initialization */
215
216 static int attrcolor = -1;
217 #endif
218
219 static int init_done = 0;
220
221 public int auto_wrap; /* Terminal does \r\n when write past margin */
222 public int ignaw; /* Terminal ignores \n immediately after wrap */
223 public int erase_char; /* The user's erase char */
224 public int erase2_char; /* The user's other erase char */
225 public int kill_char; /* The user's line-kill char */
226 public int werase_char; /* The user's word-erase char */
227 public int sc_width, sc_height; /* Height & width of screen */
228 public int bo_s_width, bo_e_width; /* Printing width of boldface seq */
229 public int ul_s_width, ul_e_width; /* Printing width of underline seq */
230 public int so_s_width, so_e_width; /* Printing width of standout seq */
231 public int bl_s_width, bl_e_width; /* Printing width of blink seq */
232 public int above_mem, below_mem; /* Memory retained above/below screen */
233 public int can_goto_line; /* Can move cursor to any line */
234 public int clear_bg; /* Clear fills with background color */
235 public int missing_cap = 0; /* Some capability is missing */
236 public char *kent = NULL; /* Keypad ENTER sequence */
237
238 static int attrmode = AT_NORMAL;
239 static int termcap_debug = -1;
240 extern int binattr;
241 extern int one_screen;
242 #if LESSTEST
243 extern char *ttyin_name;
244 #endif /*LESSTEST*/
245
246 #if !MSDOS_COMPILER
247 static char *cheaper LESSPARAMS((char *t1, char *t2, char *def));
248 static void tmodes LESSPARAMS((char *incap, char *outcap, char **instr,
249 char **outstr, char *def_instr, char *def_outstr, char **spp));
250 #endif
251
252 /*
253 * These two variables are sometimes defined in,
254 * and needed by, the termcap library.
255 */
256 #if MUST_DEFINE_OSPEED
257 extern short ospeed; /* Terminal output baud rate */
258 extern char PC; /* Pad character */
259 #endif
260 #ifdef _OSK
261 short ospeed;
262 char PC_, *UP, *BC;
263 #endif
264
265 extern int quiet; /* If VERY_QUIET, use visual bell for bell */
266 extern int no_back_scroll;
267 extern int swindow;
268 extern int no_init;
269 extern int no_keypad;
270 extern int sigs;
271 extern int wscroll;
272 extern int screen_trashed;
273 extern int top_scroll;
274 extern int quit_if_one_screen;
275 extern int oldbot;
276 extern int mousecap;
277 extern int is_tty;
278 extern int use_color;
279 #if HILITE_SEARCH
280 extern int hilite_search;
281 #endif
282 #if MSDOS_COMPILER==WIN32C
283 extern HANDLE tty;
284 extern DWORD console_mode;
285 #ifndef ENABLE_EXTENDED_FLAGS
286 #define ENABLE_EXTENDED_FLAGS 0x80
287 #define ENABLE_QUICK_EDIT_MODE 0x40
288 #endif
289 #else
290 extern int tty;
291 #endif
292
293 extern char *tgetstr();
294 extern char *tgoto();
295
296
297 /*
298 * Change terminal to "raw mode", or restore to "normal" mode.
299 * "Raw mode" means
300 * 1. An outstanding read will complete on receipt of a single keystroke.
301 * 2. Input is not echoed.
302 * 3. On output, \n is mapped to \r\n.
303 * 4. \t is NOT expanded into spaces.
304 * 5. Signal-causing characters such as ctrl-C (interrupt),
305 * etc. are NOT disabled.
306 * It doesn't matter whether an input \n is mapped to \r, or vice versa.
307 */
308 public void
raw_mode(on)309 raw_mode(on)
310 int on;
311 {
312 static int curr_on = 0;
313
314 if (on == curr_on)
315 return;
316 erase2_char = '\b'; /* in case OS doesn't know about erase2 */
317 #if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS
318 {
319 struct termios s;
320 static struct termios save_term;
321 static int saved_term = 0;
322
323 if (on)
324 {
325 /*
326 * Get terminal modes.
327 */
328 tcgetattr(tty, &s);
329
330 /*
331 * Save modes and set certain variables dependent on modes.
332 */
333 if (!saved_term)
334 {
335 save_term = s;
336 saved_term = 1;
337 }
338 #if HAVE_OSPEED
339 switch (cfgetospeed(&s))
340 {
341 #ifdef B0
342 case B0: ospeed = 0; break;
343 #endif
344 #ifdef B50
345 case B50: ospeed = 1; break;
346 #endif
347 #ifdef B75
348 case B75: ospeed = 2; break;
349 #endif
350 #ifdef B110
351 case B110: ospeed = 3; break;
352 #endif
353 #ifdef B134
354 case B134: ospeed = 4; break;
355 #endif
356 #ifdef B150
357 case B150: ospeed = 5; break;
358 #endif
359 #ifdef B200
360 case B200: ospeed = 6; break;
361 #endif
362 #ifdef B300
363 case B300: ospeed = 7; break;
364 #endif
365 #ifdef B600
366 case B600: ospeed = 8; break;
367 #endif
368 #ifdef B1200
369 case B1200: ospeed = 9; break;
370 #endif
371 #ifdef B1800
372 case B1800: ospeed = 10; break;
373 #endif
374 #ifdef B2400
375 case B2400: ospeed = 11; break;
376 #endif
377 #ifdef B4800
378 case B4800: ospeed = 12; break;
379 #endif
380 #ifdef B9600
381 case B9600: ospeed = 13; break;
382 #endif
383 #ifdef EXTA
384 case EXTA: ospeed = 14; break;
385 #endif
386 #ifdef EXTB
387 case EXTB: ospeed = 15; break;
388 #endif
389 #ifdef B57600
390 case B57600: ospeed = 16; break;
391 #endif
392 #ifdef B115200
393 case B115200: ospeed = 17; break;
394 #endif
395 default: ;
396 }
397 #endif
398 erase_char = s.c_cc[VERASE];
399 #ifdef VERASE2
400 erase2_char = s.c_cc[VERASE2];
401 #endif
402 kill_char = s.c_cc[VKILL];
403 #ifdef VWERASE
404 werase_char = s.c_cc[VWERASE];
405 #else
406 werase_char = CONTROL('W');
407 #endif
408
409 /*
410 * Set the modes to the way we want them.
411 */
412 s.c_lflag &= ~(0
413 #ifdef ICANON
414 | ICANON
415 #endif
416 #ifdef ECHO
417 | ECHO
418 #endif
419 #ifdef ECHOE
420 | ECHOE
421 #endif
422 #ifdef ECHOK
423 | ECHOK
424 #endif
425 #if ECHONL
426 | ECHONL
427 #endif
428 );
429
430 s.c_oflag |= (0
431 #ifdef OXTABS
432 | OXTABS
433 #else
434 #ifdef TAB3
435 | TAB3
436 #else
437 #ifdef XTABS
438 | XTABS
439 #endif
440 #endif
441 #endif
442 #ifdef OPOST
443 | OPOST
444 #endif
445 #ifdef ONLCR
446 | ONLCR
447 #endif
448 );
449
450 s.c_oflag &= ~(0
451 #ifdef ONOEOT
452 | ONOEOT
453 #endif
454 #ifdef OCRNL
455 | OCRNL
456 #endif
457 #ifdef ONOCR
458 | ONOCR
459 #endif
460 #ifdef ONLRET
461 | ONLRET
462 #endif
463 );
464 s.c_cc[VMIN] = 1;
465 s.c_cc[VTIME] = 0;
466 #ifdef VLNEXT
467 s.c_cc[VLNEXT] = 0;
468 #endif
469 #ifdef VDSUSP
470 s.c_cc[VDSUSP] = 0;
471 #endif
472 #if MUST_SET_LINE_DISCIPLINE
473 /*
474 * System's termios is broken; need to explicitly
475 * request TERMIODISC line discipline.
476 */
477 s.c_line = TERMIODISC;
478 #endif
479 } else
480 {
481 /*
482 * Restore saved modes.
483 */
484 s = save_term;
485 }
486 #if HAVE_FSYNC
487 fsync(tty);
488 #endif
489 tcsetattr(tty, TCSADRAIN, &s);
490 #if MUST_SET_LINE_DISCIPLINE
491 if (!on)
492 {
493 /*
494 * Broken termios *ignores* any line discipline
495 * except TERMIODISC. A different old line discipline
496 * is therefore not restored, yet. Restore the old
497 * line discipline by hand.
498 */
499 ioctl(tty, TIOCSETD, &save_term.c_line);
500 }
501 #endif
502 }
503 #else
504 #ifdef TCGETA
505 {
506 struct termio s;
507 static struct termio save_term;
508 static int saved_term = 0;
509
510 if (on)
511 {
512 /*
513 * Get terminal modes.
514 */
515 ioctl(tty, TCGETA, &s);
516
517 /*
518 * Save modes and set certain variables dependent on modes.
519 */
520 if (!saved_term)
521 {
522 save_term = s;
523 saved_term = 1;
524 }
525 #if HAVE_OSPEED
526 ospeed = s.c_cflag & CBAUD;
527 #endif
528 erase_char = s.c_cc[VERASE];
529 kill_char = s.c_cc[VKILL];
530 #ifdef VWERASE
531 werase_char = s.c_cc[VWERASE];
532 #else
533 werase_char = CONTROL('W');
534 #endif
535
536 /*
537 * Set the modes to the way we want them.
538 */
539 s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL);
540 s.c_oflag |= (OPOST|ONLCR|TAB3);
541 s.c_oflag &= ~(OCRNL|ONOCR|ONLRET);
542 s.c_cc[VMIN] = 1;
543 s.c_cc[VTIME] = 0;
544 } else
545 {
546 /*
547 * Restore saved modes.
548 */
549 s = save_term;
550 }
551 ioctl(tty, TCSETAW, &s);
552 }
553 #else
554 #ifdef TIOCGETP
555 {
556 struct sgttyb s;
557 static struct sgttyb save_term;
558 static int saved_term = 0;
559
560 if (on)
561 {
562 /*
563 * Get terminal modes.
564 */
565 ioctl(tty, TIOCGETP, &s);
566
567 /*
568 * Save modes and set certain variables dependent on modes.
569 */
570 if (!saved_term)
571 {
572 save_term = s;
573 saved_term = 1;
574 }
575 #if HAVE_OSPEED
576 ospeed = s.sg_ospeed;
577 #endif
578 erase_char = s.sg_erase;
579 kill_char = s.sg_kill;
580 werase_char = CONTROL('W');
581
582 /*
583 * Set the modes to the way we want them.
584 */
585 s.sg_flags |= CBREAK;
586 s.sg_flags &= ~(ECHO|XTABS);
587 } else
588 {
589 /*
590 * Restore saved modes.
591 */
592 s = save_term;
593 }
594 ioctl(tty, TIOCSETN, &s);
595 }
596 #else
597 #ifdef _OSK
598 {
599 struct sgbuf s;
600 static struct sgbuf save_term;
601 static int saved_term = 0;
602
603 if (on)
604 {
605 /*
606 * Get terminal modes.
607 */
608 _gs_opt(tty, &s);
609
610 /*
611 * Save modes and set certain variables dependent on modes.
612 */
613 if (!saved_term)
614 {
615 save_term = s;
616 saved_term = 1;
617 }
618 erase_char = s.sg_bspch;
619 kill_char = s.sg_dlnch;
620 werase_char = CONTROL('W');
621
622 /*
623 * Set the modes to the way we want them.
624 */
625 s.sg_echo = 0;
626 s.sg_eofch = 0;
627 s.sg_pause = 0;
628 s.sg_psch = 0;
629 } else
630 {
631 /*
632 * Restore saved modes.
633 */
634 s = save_term;
635 }
636 _ss_opt(tty, &s);
637 }
638 #else
639 /* MS-DOS, Windows, or OS2 */
640 #if OS2
641 /* OS2 */
642 LSIGNAL(SIGINT, SIG_IGN);
643 #endif
644 erase_char = '\b';
645 #if MSDOS_COMPILER==DJGPPC
646 kill_char = CONTROL('U');
647 /*
648 * So that when we shell out or run another program, its
649 * stdin is in cooked mode. We do not switch stdin to binary
650 * mode if fd0 is zero, since that means we were called before
651 * tty was reopened in open_getchr, in which case we would be
652 * changing the original stdin device outside less.
653 */
654 if (fd0 != 0)
655 setmode(0, on ? O_BINARY : O_TEXT);
656 #else
657 kill_char = ESC;
658 #endif
659 werase_char = CONTROL('W');
660 #endif
661 #endif
662 #endif
663 #endif
664 curr_on = on;
665 }
666
667 #if !MSDOS_COMPILER
668 /*
669 * Some glue to prevent calling termcap functions if tgetent() failed.
670 */
671 static int hardcopy;
672
673 static char *
ltget_env(capname)674 ltget_env(capname)
675 char *capname;
676 {
677 char name[64];
678
679 if (termcap_debug)
680 {
681 struct env { struct env *next; char *name; char *value; };
682 static struct env *envs = NULL;
683 struct env *p;
684 for (p = envs; p != NULL; p = p->next)
685 if (strcmp(p->name, capname) == 0)
686 return p->value;
687 p = (struct env *) ecalloc(1, sizeof(struct env));
688 p->name = save(capname);
689 p->value = (char *) ecalloc(strlen(capname)+3, sizeof(char));
690 sprintf(p->value, "<%s>", capname);
691 p->next = envs;
692 envs = p;
693 return p->value;
694 }
695 SNPRINTF1(name, sizeof(name), "LESS_TERMCAP_%s", capname);
696 return (lgetenv(name));
697 }
698
699 static int
ltgetflag(capname)700 ltgetflag(capname)
701 char *capname;
702 {
703 char *s;
704
705 if ((s = ltget_env(capname)) != NULL)
706 return (*s != '\0' && *s != '0');
707 if (hardcopy)
708 return (0);
709 return (tgetflag(capname));
710 }
711
712 static int
ltgetnum(capname)713 ltgetnum(capname)
714 char *capname;
715 {
716 char *s;
717
718 if ((s = ltget_env(capname)) != NULL)
719 return (atoi(s));
720 if (hardcopy)
721 return (-1);
722 return (tgetnum(capname));
723 }
724
725 static char *
ltgetstr(capname,pp)726 ltgetstr(capname, pp)
727 char *capname;
728 char **pp;
729 {
730 char *s;
731
732 if ((s = ltget_env(capname)) != NULL)
733 return (s);
734 if (hardcopy)
735 return (NULL);
736 return (tgetstr(capname, pp));
737 }
738 #endif /* MSDOS_COMPILER */
739
740 /*
741 * Get size of the output screen.
742 */
743 public void
scrsize(VOID_PARAM)744 scrsize(VOID_PARAM)
745 {
746 char *s;
747 int sys_height;
748 int sys_width;
749 #if !MSDOS_COMPILER
750 int n;
751 #endif
752
753 #define DEF_SC_WIDTH 80
754 #if MSDOS_COMPILER
755 #define DEF_SC_HEIGHT 25
756 #else
757 #define DEF_SC_HEIGHT 24
758 #endif
759
760
761 sys_width = sys_height = 0;
762
763 #if MSDOS_COMPILER==MSOFTC
764 {
765 struct videoconfig w;
766 _getvideoconfig(&w);
767 sys_height = w.numtextrows;
768 sys_width = w.numtextcols;
769 }
770 #else
771 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
772 {
773 struct text_info w;
774 gettextinfo(&w);
775 sys_height = w.screenheight;
776 sys_width = w.screenwidth;
777 }
778 #else
779 #if MSDOS_COMPILER==WIN32C
780 {
781 CONSOLE_SCREEN_BUFFER_INFO scr;
782 GetConsoleScreenBufferInfo(con_out, &scr);
783 sys_height = scr.srWindow.Bottom - scr.srWindow.Top + 1;
784 sys_width = scr.srWindow.Right - scr.srWindow.Left + 1;
785 }
786 #else
787 #if OS2
788 {
789 int s[2];
790 _scrsize(s);
791 sys_width = s[0];
792 sys_height = s[1];
793 /*
794 * When using terminal emulators for XFree86/OS2, the
795 * _scrsize function does not work well.
796 * Call the scrsize.exe program to get the window size.
797 */
798 windowid = getenv("WINDOWID");
799 if (windowid != NULL)
800 {
801 FILE *fd = popen("scrsize", "rt");
802 if (fd != NULL)
803 {
804 int w, h;
805 fscanf(fd, "%i %i", &w, &h);
806 if (w > 0 && h > 0)
807 {
808 sys_width = w;
809 sys_height = h;
810 }
811 pclose(fd);
812 }
813 }
814 }
815 #else
816 #ifdef TIOCGWINSZ
817 {
818 struct winsize w;
819 if (ioctl(2, TIOCGWINSZ, &w) == 0)
820 {
821 if (w.ws_row > 0)
822 sys_height = w.ws_row;
823 if (w.ws_col > 0)
824 sys_width = w.ws_col;
825 }
826 }
827 #else
828 #ifdef WIOCGETD
829 {
830 struct uwdata w;
831 if (ioctl(2, WIOCGETD, &w) == 0)
832 {
833 if (w.uw_height > 0)
834 sys_height = w.uw_height / w.uw_vs;
835 if (w.uw_width > 0)
836 sys_width = w.uw_width / w.uw_hs;
837 }
838 }
839 #endif
840 #endif
841 #endif
842 #endif
843 #endif
844 #endif
845
846 if (sys_height > 0)
847 sc_height = sys_height;
848 else if ((s = lgetenv("LINES")) != NULL)
849 sc_height = atoi(s);
850 #if !MSDOS_COMPILER
851 else if ((n = ltgetnum("li")) > 0)
852 sc_height = n;
853 #endif
854 if (sc_height <= 0)
855 sc_height = DEF_SC_HEIGHT;
856
857 if (sys_width > 0)
858 sc_width = sys_width;
859 else if ((s = lgetenv("COLUMNS")) != NULL)
860 sc_width = atoi(s);
861 #if !MSDOS_COMPILER
862 else if ((n = ltgetnum("co")) > 0)
863 sc_width = n;
864 #endif
865 if (sc_width <= 0)
866 sc_width = DEF_SC_WIDTH;
867 }
868
869 #if MSDOS_COMPILER==MSOFTC
870 /*
871 * Figure out how many empty loops it takes to delay a millisecond.
872 */
873 static void
get_clock(VOID_PARAM)874 get_clock(VOID_PARAM)
875 {
876 clock_t start;
877
878 /*
879 * Get synchronized at the start of a tick.
880 */
881 start = clock();
882 while (clock() == start)
883 ;
884 /*
885 * Now count loops till the next tick.
886 */
887 start = clock();
888 msec_loops = 0;
889 while (clock() == start)
890 msec_loops++;
891 /*
892 * Convert from (loops per clock) to (loops per millisecond).
893 */
894 msec_loops *= CLOCKS_PER_SEC;
895 msec_loops /= 1000;
896 }
897
898 /*
899 * Delay for a specified number of milliseconds.
900 */
901 static void
delay(msec)902 delay(msec)
903 int msec;
904 {
905 long i;
906
907 while (msec-- > 0)
908 {
909 for (i = 0; i < msec_loops; i++)
910 (void) clock();
911 }
912 }
913 #endif
914
915 /*
916 * Return the characters actually input by a "special" key.
917 */
918 public char *
special_key_str(key)919 special_key_str(key)
920 int key;
921 {
922 static char tbuf[40];
923 char *s;
924 #if MSDOS_COMPILER || OS2
925 static char k_right[] = { '\340', PCK_RIGHT, 0 };
926 static char k_left[] = { '\340', PCK_LEFT, 0 };
927 static char k_ctl_right[] = { '\340', PCK_CTL_RIGHT, 0 };
928 static char k_ctl_left[] = { '\340', PCK_CTL_LEFT, 0 };
929 static char k_insert[] = { '\340', PCK_INSERT, 0 };
930 static char k_delete[] = { '\340', PCK_DELETE, 0 };
931 static char k_ctl_delete[] = { '\340', PCK_CTL_DELETE, 0 };
932 static char k_ctl_backspace[] = { '\177', 0 };
933 static char k_home[] = { '\340', PCK_HOME, 0 };
934 static char k_end[] = { '\340', PCK_END, 0 };
935 static char k_up[] = { '\340', PCK_UP, 0 };
936 static char k_down[] = { '\340', PCK_DOWN, 0 };
937 static char k_backtab[] = { '\340', PCK_SHIFT_TAB, 0 };
938 static char k_pagedown[] = { '\340', PCK_PAGEDOWN, 0 };
939 static char k_pageup[] = { '\340', PCK_PAGEUP, 0 };
940 static char k_f1[] = { '\340', PCK_F1, 0 };
941 #endif
942 #if !MSDOS_COMPILER
943 char *sp = tbuf;
944 #endif
945
946 switch (key)
947 {
948 #if OS2
949 /*
950 * If windowid is not NULL, assume less is executed in
951 * the XFree86 environment.
952 */
953 case SK_RIGHT_ARROW:
954 s = windowid ? ltgetstr("kr", &sp) : k_right;
955 break;
956 case SK_LEFT_ARROW:
957 s = windowid ? ltgetstr("kl", &sp) : k_left;
958 break;
959 case SK_UP_ARROW:
960 s = windowid ? ltgetstr("ku", &sp) : k_up;
961 break;
962 case SK_DOWN_ARROW:
963 s = windowid ? ltgetstr("kd", &sp) : k_down;
964 break;
965 case SK_PAGE_UP:
966 s = windowid ? ltgetstr("kP", &sp) : k_pageup;
967 break;
968 case SK_PAGE_DOWN:
969 s = windowid ? ltgetstr("kN", &sp) : k_pagedown;
970 break;
971 case SK_HOME:
972 s = windowid ? ltgetstr("kh", &sp) : k_home;
973 break;
974 case SK_END:
975 s = windowid ? ltgetstr("@7", &sp) : k_end;
976 break;
977 case SK_DELETE:
978 s = windowid ? ltgetstr("kD", &sp) : k_delete;
979 if (s == NULL)
980 {
981 tbuf[0] = '\177';
982 tbuf[1] = '\0';
983 s = tbuf;
984 }
985 break;
986 #endif
987 #if MSDOS_COMPILER
988 case SK_RIGHT_ARROW:
989 s = k_right;
990 break;
991 case SK_LEFT_ARROW:
992 s = k_left;
993 break;
994 case SK_UP_ARROW:
995 s = k_up;
996 break;
997 case SK_DOWN_ARROW:
998 s = k_down;
999 break;
1000 case SK_PAGE_UP:
1001 s = k_pageup;
1002 break;
1003 case SK_PAGE_DOWN:
1004 s = k_pagedown;
1005 break;
1006 case SK_HOME:
1007 s = k_home;
1008 break;
1009 case SK_END:
1010 s = k_end;
1011 break;
1012 case SK_DELETE:
1013 s = k_delete;
1014 break;
1015 #endif
1016 #if MSDOS_COMPILER || OS2
1017 case SK_INSERT:
1018 s = k_insert;
1019 break;
1020 case SK_CTL_LEFT_ARROW:
1021 s = k_ctl_left;
1022 break;
1023 case SK_CTL_RIGHT_ARROW:
1024 s = k_ctl_right;
1025 break;
1026 case SK_CTL_BACKSPACE:
1027 s = k_ctl_backspace;
1028 break;
1029 case SK_CTL_DELETE:
1030 s = k_ctl_delete;
1031 break;
1032 case SK_F1:
1033 s = k_f1;
1034 break;
1035 case SK_BACKTAB:
1036 s = k_backtab;
1037 break;
1038 #else
1039 case SK_RIGHT_ARROW:
1040 s = ltgetstr("kr", &sp);
1041 break;
1042 case SK_LEFT_ARROW:
1043 s = ltgetstr("kl", &sp);
1044 break;
1045 case SK_UP_ARROW:
1046 s = ltgetstr("ku", &sp);
1047 break;
1048 case SK_DOWN_ARROW:
1049 s = ltgetstr("kd", &sp);
1050 break;
1051 case SK_PAGE_UP:
1052 s = ltgetstr("kP", &sp);
1053 break;
1054 case SK_PAGE_DOWN:
1055 s = ltgetstr("kN", &sp);
1056 break;
1057 case SK_HOME:
1058 s = ltgetstr("kh", &sp);
1059 break;
1060 case SK_END:
1061 s = ltgetstr("@7", &sp);
1062 break;
1063 case SK_DELETE:
1064 s = ltgetstr("kD", &sp);
1065 if (s == NULL)
1066 {
1067 tbuf[0] = '\177';
1068 tbuf[1] = '\0';
1069 s = tbuf;
1070 }
1071 break;
1072 #endif
1073 case SK_CONTROL_K:
1074 tbuf[0] = CONTROL('K');
1075 tbuf[1] = '\0';
1076 s = tbuf;
1077 break;
1078 default:
1079 return (NULL);
1080 }
1081 return (s);
1082 }
1083
1084 /*
1085 * Get terminal capabilities via termcap.
1086 */
1087 public void
get_term(VOID_PARAM)1088 get_term(VOID_PARAM)
1089 {
1090 termcap_debug = !isnullenv(lgetenv("LESS_TERMCAP_DEBUG"));
1091 #if MSDOS_COMPILER
1092 auto_wrap = 1;
1093 ignaw = 0;
1094 can_goto_line = 1;
1095 clear_bg = 1;
1096 /*
1097 * Set up default colors.
1098 * The xx_s_width and xx_e_width vars are already initialized to 0.
1099 */
1100 #if MSDOS_COMPILER==MSOFTC
1101 sy_bg_color = _getbkcolor();
1102 sy_fg_color = _gettextcolor();
1103 get_clock();
1104 #else
1105 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1106 {
1107 struct text_info w;
1108 gettextinfo(&w);
1109 sy_bg_color = (w.attribute >> 4) & 0x0F;
1110 sy_fg_color = (w.attribute >> 0) & 0x0F;
1111 }
1112 #else
1113 #if MSDOS_COMPILER==WIN32C
1114 {
1115 CONSOLE_SCREEN_BUFFER_INFO scr;
1116
1117 con_out_save = con_out = GetStdHandle(STD_OUTPUT_HANDLE);
1118 /*
1119 * Always open stdin in binary. Note this *must* be done
1120 * before any file operations have been done on fd0.
1121 */
1122 SET_BINARY(0);
1123 GetConsoleMode(con_out, &init_output_mode);
1124 GetConsoleScreenBufferInfo(con_out, &scr);
1125 curr_attr = scr.wAttributes;
1126 sy_bg_color = (curr_attr & BG_COLORS) >> 4; /* normalize */
1127 sy_fg_color = curr_attr & FG_COLORS;
1128 }
1129 #endif
1130 #endif
1131 #endif
1132 nm_fg_color = sy_fg_color;
1133 nm_bg_color = sy_bg_color;
1134 bo_fg_color = 11;
1135 bo_bg_color = 0;
1136 ul_fg_color = 9;
1137 ul_bg_color = 0;
1138 so_fg_color = 15;
1139 so_bg_color = 9;
1140 bl_fg_color = 15;
1141 bl_bg_color = 0;
1142 sgr_mode = 0;
1143
1144 /*
1145 * Get size of the screen.
1146 */
1147 scrsize();
1148 pos_init();
1149
1150
1151 #else /* !MSDOS_COMPILER */
1152 {
1153 char *sp;
1154 char *t1, *t2;
1155 char *term;
1156 /*
1157 * Some termcap libraries assume termbuf is static
1158 * (accessible after tgetent returns).
1159 */
1160 static char termbuf[TERMBUF_SIZE];
1161 static char sbuf[TERMSBUF_SIZE];
1162
1163 #if OS2
1164 /*
1165 * Make sure the termcap database is available.
1166 */
1167 sp = lgetenv("TERMCAP");
1168 if (isnullenv(sp))
1169 {
1170 char *termcap;
1171 if ((sp = homefile("termcap.dat")) != NULL)
1172 {
1173 termcap = (char *) ecalloc(strlen(sp)+9, sizeof(char));
1174 sprintf(termcap, "TERMCAP=%s", sp);
1175 free(sp);
1176 putenv(termcap);
1177 }
1178 }
1179 #endif
1180 /*
1181 * Find out what kind of terminal this is.
1182 */
1183 if ((term = lgetenv("TERM")) == NULL)
1184 term = DEFAULT_TERM;
1185 hardcopy = 0;
1186 /* {{ Should probably just pass NULL instead of termbuf. }} */
1187 if (tgetent(termbuf, term) != TGETENT_OK)
1188 hardcopy = 1;
1189 if (ltgetflag("hc"))
1190 hardcopy = 1;
1191
1192 /*
1193 * Get size of the screen.
1194 */
1195 scrsize();
1196 pos_init();
1197
1198 auto_wrap = ltgetflag("am");
1199 ignaw = ltgetflag("xn");
1200 above_mem = ltgetflag("da");
1201 below_mem = ltgetflag("db");
1202 clear_bg = ltgetflag("ut");
1203
1204 /*
1205 * Assumes termcap variable "sg" is the printing width of:
1206 * the standout sequence, the end standout sequence,
1207 * the underline sequence, the end underline sequence,
1208 * the boldface sequence, and the end boldface sequence.
1209 */
1210 if ((so_s_width = ltgetnum("sg")) < 0)
1211 so_s_width = 0;
1212 so_e_width = so_s_width;
1213
1214 bo_s_width = bo_e_width = so_s_width;
1215 ul_s_width = ul_e_width = so_s_width;
1216 bl_s_width = bl_e_width = so_s_width;
1217
1218 #if HILITE_SEARCH
1219 if (so_s_width > 0 || so_e_width > 0)
1220 /*
1221 * Disable highlighting by default on magic cookie terminals.
1222 * Turning on highlighting might change the displayed width
1223 * of a line, causing the display to get messed up.
1224 * The user can turn it back on with -g,
1225 * but she won't like the results.
1226 */
1227 hilite_search = 0;
1228 #endif
1229
1230 /*
1231 * Get various string-valued capabilities.
1232 */
1233 sp = sbuf;
1234
1235 #if HAVE_OSPEED
1236 sc_pad = ltgetstr("pc", &sp);
1237 if (sc_pad != NULL)
1238 PC = *sc_pad;
1239 #endif
1240
1241 sc_s_keypad = ltgetstr("ks", &sp);
1242 if (sc_s_keypad == NULL)
1243 sc_s_keypad = "";
1244 sc_e_keypad = ltgetstr("ke", &sp);
1245 if (sc_e_keypad == NULL)
1246 sc_e_keypad = "";
1247 kent = ltgetstr("@8", &sp);
1248
1249 sc_s_mousecap = ltgetstr("MOUSE_START", &sp);
1250 if (sc_s_mousecap == NULL)
1251 sc_s_mousecap = ESCS "[?1000h" ESCS "[?1006h";
1252 sc_e_mousecap = ltgetstr("MOUSE_END", &sp);
1253 if (sc_e_mousecap == NULL)
1254 sc_e_mousecap = ESCS "[?1006l" ESCS "[?1000l";
1255
1256 sc_init = ltgetstr("ti", &sp);
1257 if (sc_init == NULL)
1258 sc_init = "";
1259
1260 sc_deinit= ltgetstr("te", &sp);
1261 if (sc_deinit == NULL)
1262 sc_deinit = "";
1263
1264 sc_eol_clear = ltgetstr("ce", &sp);
1265 if (sc_eol_clear == NULL || *sc_eol_clear == '\0')
1266 {
1267 missing_cap = 1;
1268 sc_eol_clear = "";
1269 }
1270
1271 sc_eos_clear = ltgetstr("cd", &sp);
1272 if (below_mem && (sc_eos_clear == NULL || *sc_eos_clear == '\0'))
1273 {
1274 missing_cap = 1;
1275 sc_eos_clear = "";
1276 }
1277
1278 sc_clear = ltgetstr("cl", &sp);
1279 if (sc_clear == NULL || *sc_clear == '\0')
1280 {
1281 missing_cap = 1;
1282 sc_clear = "\n\n";
1283 }
1284
1285 sc_move = ltgetstr("cm", &sp);
1286 if (sc_move == NULL || *sc_move == '\0')
1287 {
1288 /*
1289 * This is not an error here, because we don't
1290 * always need sc_move.
1291 * We need it only if we don't have home or lower-left.
1292 */
1293 sc_move = "";
1294 can_goto_line = 0;
1295 } else
1296 can_goto_line = 1;
1297
1298 tmodes("so", "se", &sc_s_in, &sc_s_out, "", "", &sp);
1299 tmodes("us", "ue", &sc_u_in, &sc_u_out, sc_s_in, sc_s_out, &sp);
1300 tmodes("md", "me", &sc_b_in, &sc_b_out, sc_s_in, sc_s_out, &sp);
1301 tmodes("mb", "me", &sc_bl_in, &sc_bl_out, sc_s_in, sc_s_out, &sp);
1302
1303 sc_visual_bell = ltgetstr("vb", &sp);
1304 if (sc_visual_bell == NULL)
1305 sc_visual_bell = "";
1306
1307 if (ltgetflag("bs"))
1308 sc_backspace = "\b";
1309 else
1310 {
1311 sc_backspace = ltgetstr("bc", &sp);
1312 if (sc_backspace == NULL || *sc_backspace == '\0')
1313 sc_backspace = "\b";
1314 }
1315
1316 /*
1317 * Choose between using "ho" and "cm" ("home" and "cursor move")
1318 * to move the cursor to the upper left corner of the screen.
1319 */
1320 t1 = ltgetstr("ho", &sp);
1321 if (t1 == NULL)
1322 t1 = "";
1323 if (*sc_move == '\0')
1324 t2 = "";
1325 else
1326 {
1327 strcpy(sp, tgoto(sc_move, 0, 0));
1328 t2 = sp;
1329 sp += strlen(sp) + 1;
1330 }
1331 sc_home = cheaper(t1, t2, "|\b^");
1332
1333 /*
1334 * Choose between using "ll" and "cm" ("lower left" and "cursor move")
1335 * to move the cursor to the lower left corner of the screen.
1336 */
1337 t1 = ltgetstr("ll", &sp);
1338 if (t1 == NULL)
1339 t1 = "";
1340 if (*sc_move == '\0')
1341 t2 = "";
1342 else
1343 {
1344 strcpy(sp, tgoto(sc_move, 0, sc_height-1));
1345 t2 = sp;
1346 sp += strlen(sp) + 1;
1347 }
1348 sc_lower_left = cheaper(t1, t2, "\r");
1349
1350 /*
1351 * Get carriage return string.
1352 */
1353 sc_return = ltgetstr("cr", &sp);
1354 if (sc_return == NULL)
1355 sc_return = "\r";
1356
1357 /*
1358 * Choose between using "al" or "sr" ("add line" or "scroll reverse")
1359 * to add a line at the top of the screen.
1360 */
1361 t1 = ltgetstr("al", &sp);
1362 if (t1 == NULL)
1363 t1 = "";
1364 t2 = ltgetstr("sr", &sp);
1365 if (t2 == NULL)
1366 t2 = "";
1367 #if OS2
1368 if (*t1 == '\0' && *t2 == '\0')
1369 sc_addline = "";
1370 else
1371 #endif
1372 if (above_mem)
1373 sc_addline = t1;
1374 else
1375 sc_addline = cheaper(t1, t2, "");
1376 if (*sc_addline == '\0')
1377 {
1378 /*
1379 * Force repaint on any backward movement.
1380 */
1381 no_back_scroll = 1;
1382 }
1383 }
1384 #endif /* MSDOS_COMPILER */
1385 }
1386
1387 #if !MSDOS_COMPILER
1388 /*
1389 * Return the cost of displaying a termcap string.
1390 * We use the trick of calling tputs, but as a char printing function
1391 * we give it inc_costcount, which just increments "costcount".
1392 * This tells us how many chars would be printed by using this string.
1393 * {{ Couldn't we just use strlen? }}
1394 */
1395 static int costcount;
1396
1397 /*ARGSUSED*/
1398 static int
inc_costcount(c)1399 inc_costcount(c)
1400 int c;
1401 {
1402 costcount++;
1403 return (c);
1404 }
1405
1406 static int
cost(t)1407 cost(t)
1408 char *t;
1409 {
1410 costcount = 0;
1411 tputs(t, sc_height, inc_costcount);
1412 return (costcount);
1413 }
1414
1415 /*
1416 * Return the "best" of the two given termcap strings.
1417 * The best, if both exist, is the one with the lower
1418 * cost (see cost() function).
1419 */
1420 static char *
cheaper(t1,t2,def)1421 cheaper(t1, t2, def)
1422 char *t1, *t2;
1423 char *def;
1424 {
1425 if (*t1 == '\0' && *t2 == '\0')
1426 {
1427 missing_cap = 1;
1428 return (def);
1429 }
1430 if (*t1 == '\0')
1431 return (t2);
1432 if (*t2 == '\0')
1433 return (t1);
1434 if (cost(t1) < cost(t2))
1435 return (t1);
1436 return (t2);
1437 }
1438
1439 static void
tmodes(incap,outcap,instr,outstr,def_instr,def_outstr,spp)1440 tmodes(incap, outcap, instr, outstr, def_instr, def_outstr, spp)
1441 char *incap;
1442 char *outcap;
1443 char **instr;
1444 char **outstr;
1445 char *def_instr;
1446 char *def_outstr;
1447 char **spp;
1448 {
1449 *instr = ltgetstr(incap, spp);
1450 if (*instr == NULL)
1451 {
1452 /* Use defaults. */
1453 *instr = def_instr;
1454 *outstr = def_outstr;
1455 return;
1456 }
1457
1458 *outstr = ltgetstr(outcap, spp);
1459 if (*outstr == NULL)
1460 /* No specific out capability; use "me". */
1461 *outstr = ltgetstr("me", spp);
1462 if (*outstr == NULL)
1463 /* Don't even have "me"; use a null string. */
1464 *outstr = "";
1465 }
1466
1467 #endif /* MSDOS_COMPILER */
1468
1469
1470 /*
1471 * Below are the functions which perform all the
1472 * terminal-specific screen manipulation.
1473 */
1474
1475
1476 #if MSDOS_COMPILER
1477
1478 #if MSDOS_COMPILER==WIN32C
1479 static void
_settextposition(int row,int col)1480 _settextposition(int row, int col)
1481 {
1482 COORD cpos;
1483 CONSOLE_SCREEN_BUFFER_INFO csbi;
1484
1485 GetConsoleScreenBufferInfo(con_out, &csbi);
1486 cpos.X = csbi.srWindow.Left + (col - 1);
1487 cpos.Y = csbi.srWindow.Top + (row - 1);
1488 SetConsoleCursorPosition(con_out, cpos);
1489 }
1490 #endif
1491
1492 /*
1493 * Initialize the screen to the correct color at startup.
1494 */
1495 static void
initcolor(VOID_PARAM)1496 initcolor(VOID_PARAM)
1497 {
1498 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1499 intensevideo();
1500 #endif
1501 SETCOLORS(nm_fg_color, nm_bg_color);
1502 #if 0
1503 /*
1504 * This clears the screen at startup. This is different from
1505 * the behavior of other versions of less. Disable it for now.
1506 */
1507 char *blanks;
1508 int row;
1509 int col;
1510
1511 /*
1512 * Create a complete, blank screen using "normal" colors.
1513 */
1514 SETCOLORS(nm_fg_color, nm_bg_color);
1515 blanks = (char *) ecalloc(width+1, sizeof(char));
1516 for (col = 0; col < sc_width; col++)
1517 blanks[col] = ' ';
1518 blanks[sc_width] = '\0';
1519 for (row = 0; row < sc_height; row++)
1520 _outtext(blanks);
1521 free(blanks);
1522 #endif
1523 }
1524 #endif
1525
1526 #if MSDOS_COMPILER==WIN32C
1527
1528 /*
1529 * Enable virtual terminal processing, if available.
1530 */
1531 static void
win32_init_vt_term(VOID_PARAM)1532 win32_init_vt_term(VOID_PARAM)
1533 {
1534 DWORD output_mode;
1535
1536 if (vt_enabled == 0 || (vt_enabled == 1 && con_out == con_out_ours))
1537 return;
1538
1539 GetConsoleMode(con_out, &output_mode);
1540 vt_enabled = SetConsoleMode(con_out,
1541 output_mode | ENABLE_VIRTUAL_TERMINAL_PROCESSING);
1542 if (vt_enabled)
1543 {
1544 auto_wrap = 0;
1545 ignaw = 1;
1546 }
1547 }
1548
1549 static void
win32_deinit_vt_term(VOID_PARAM)1550 win32_deinit_vt_term(VOID_PARAM)
1551 {
1552 if (vt_enabled == 1 && con_out == con_out_save)
1553 SetConsoleMode(con_out, init_output_mode);
1554 }
1555
1556 /*
1557 * Termcap-like init with a private win32 console.
1558 */
1559 static void
win32_init_term(VOID_PARAM)1560 win32_init_term(VOID_PARAM)
1561 {
1562 CONSOLE_SCREEN_BUFFER_INFO scr;
1563 COORD size;
1564
1565 if (con_out_save == INVALID_HANDLE_VALUE)
1566 return;
1567
1568 GetConsoleScreenBufferInfo(con_out_save, &scr);
1569
1570 if (con_out_ours == INVALID_HANDLE_VALUE)
1571 {
1572 /*
1573 * Create our own screen buffer, so that we
1574 * may restore the original when done.
1575 */
1576 con_out_ours = CreateConsoleScreenBuffer(
1577 GENERIC_WRITE | GENERIC_READ,
1578 FILE_SHARE_WRITE | FILE_SHARE_READ,
1579 (LPSECURITY_ATTRIBUTES) NULL,
1580 CONSOLE_TEXTMODE_BUFFER,
1581 (LPVOID) NULL);
1582 }
1583
1584 size.X = scr.srWindow.Right - scr.srWindow.Left + 1;
1585 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1;
1586 SetConsoleScreenBufferSize(con_out_ours, size);
1587 SetConsoleActiveScreenBuffer(con_out_ours);
1588 con_out = con_out_ours;
1589 }
1590
1591 /*
1592 * Restore the startup console.
1593 */
1594 static void
win32_deinit_term(VOID_PARAM)1595 win32_deinit_term(VOID_PARAM)
1596 {
1597 if (con_out_save == INVALID_HANDLE_VALUE)
1598 return;
1599 if (quitting)
1600 (void) CloseHandle(con_out_ours);
1601 SetConsoleActiveScreenBuffer(con_out_save);
1602 con_out = con_out_save;
1603 }
1604
1605 #endif
1606
1607 #if !MSDOS_COMPILER
1608 static void
do_tputs(str,affcnt,f_putc)1609 do_tputs(str, affcnt, f_putc)
1610 char *str;
1611 int affcnt;
1612 int (*f_putc)(int);
1613 {
1614 #if LESSTEST
1615 if (ttyin_name != NULL)
1616 putstr(str);
1617 else
1618 #endif /*LESSTEST*/
1619 tputs(str, affcnt, f_putc);
1620 }
1621
1622 /*
1623 * Like tputs but we handle $<...> delay strings here because
1624 * some implementations of tputs don't perform delays correctly.
1625 */
1626 static void
ltputs(str,affcnt,f_putc)1627 ltputs(str, affcnt, f_putc)
1628 char *str;
1629 int affcnt;
1630 int (*f_putc)(int);
1631 {
1632 while (str != NULL && *str != '\0')
1633 {
1634 #if HAVE_STRSTR
1635 char *obrac = strstr(str, "$<");
1636 if (obrac != NULL)
1637 {
1638 char str2[64];
1639 int slen = obrac - str;
1640 if (slen < sizeof(str2))
1641 {
1642 int delay;
1643 /* Output first part of string (before "$<"). */
1644 memcpy(str2, str, slen);
1645 str2[slen] = '\0';
1646 do_tputs(str2, affcnt, f_putc);
1647 str += slen + 2;
1648 /* Perform the delay. */
1649 delay = lstrtoi(str, &str);
1650 if (*str == '*')
1651 delay *= affcnt;
1652 flush();
1653 sleep_ms(delay);
1654 /* Skip past closing ">" at end of delay string. */
1655 str = strstr(str, ">");
1656 if (str != NULL)
1657 str++;
1658 continue;
1659 }
1660 }
1661 #endif
1662 /* Pass the rest of the string to tputs and we're done. */
1663 do_tputs(str, affcnt, f_putc);
1664 break;
1665 }
1666 }
1667 #endif /* MSDOS_COMPILER */
1668
1669 /*
1670 * Configure the termimal so mouse clicks and wheel moves
1671 * produce input to less.
1672 */
1673 public void
init_mouse(VOID_PARAM)1674 init_mouse(VOID_PARAM)
1675 {
1676 #if !MSDOS_COMPILER
1677 ltputs(sc_s_mousecap, sc_height, putchr);
1678 #else
1679 #if MSDOS_COMPILER==WIN32C
1680 SetConsoleMode(tty, ENABLE_PROCESSED_INPUT | ENABLE_MOUSE_INPUT
1681 | ENABLE_EXTENDED_FLAGS /* disable quick edit */);
1682
1683 #endif
1684 #endif
1685 }
1686
1687 /*
1688 * Configure the terminal so mouse clicks and wheel moves
1689 * are handled by the system (so text can be selected, etc).
1690 */
1691 public void
deinit_mouse(VOID_PARAM)1692 deinit_mouse(VOID_PARAM)
1693 {
1694 #if !MSDOS_COMPILER
1695 ltputs(sc_e_mousecap, sc_height, putchr);
1696 #else
1697 #if MSDOS_COMPILER==WIN32C
1698 SetConsoleMode(tty, ENABLE_PROCESSED_INPUT | ENABLE_EXTENDED_FLAGS
1699 | (console_mode & ENABLE_QUICK_EDIT_MODE));
1700 #endif
1701 #endif
1702 }
1703
1704 /*
1705 * Initialize terminal
1706 */
1707 public void
init(VOID_PARAM)1708 init(VOID_PARAM)
1709 {
1710 clear_bot_if_needed();
1711 #if !MSDOS_COMPILER
1712 if (!(quit_if_one_screen && one_screen))
1713 {
1714 if (!no_init)
1715 ltputs(sc_init, sc_height, putchr);
1716 if (!no_keypad)
1717 ltputs(sc_s_keypad, sc_height, putchr);
1718 if (mousecap)
1719 init_mouse();
1720 }
1721 init_done = 1;
1722 if (top_scroll)
1723 {
1724 int i;
1725
1726 /*
1727 * This is nice to terminals with no alternate screen,
1728 * but with saved scrolled-off-the-top lines. This way,
1729 * no previous line is lost, but we start with a whole
1730 * screen to ourself.
1731 */
1732 for (i = 1; i < sc_height; i++)
1733 putchr('\n');
1734 } else
1735 line_left();
1736 #else
1737 #if MSDOS_COMPILER==WIN32C
1738 if (!(quit_if_one_screen && one_screen))
1739 {
1740 if (!no_init)
1741 win32_init_term();
1742 if (mousecap)
1743 init_mouse();
1744
1745 }
1746 win32_init_vt_term();
1747 #endif
1748 init_done = 1;
1749 initcolor();
1750 flush();
1751 #endif
1752 }
1753
1754 /*
1755 * Deinitialize terminal
1756 */
1757 public void
deinit(VOID_PARAM)1758 deinit(VOID_PARAM)
1759 {
1760 if (!init_done)
1761 return;
1762 #if !MSDOS_COMPILER
1763 if (!(quit_if_one_screen && one_screen))
1764 {
1765 if (mousecap)
1766 deinit_mouse();
1767 if (!no_keypad)
1768 ltputs(sc_e_keypad, sc_height, putchr);
1769 if (!no_init)
1770 ltputs(sc_deinit, sc_height, putchr);
1771 }
1772 #else
1773 /* Restore system colors. */
1774 SETCOLORS(sy_fg_color, sy_bg_color);
1775 #if MSDOS_COMPILER==WIN32C
1776 win32_deinit_vt_term();
1777 if (!(quit_if_one_screen && one_screen))
1778 {
1779 if (mousecap)
1780 deinit_mouse();
1781 if (!no_init)
1782 win32_deinit_term();
1783 }
1784 #else
1785 /* Need clreol to make SETCOLORS take effect. */
1786 clreol();
1787 #endif
1788 #endif
1789 init_done = 0;
1790 }
1791
1792 /*
1793 * Are we interactive (ie. writing to an initialized tty)?
1794 */
1795 public int
interactive(VOID_PARAM)1796 interactive(VOID_PARAM)
1797 {
1798 return (is_tty && init_done);
1799 }
1800
1801 static void
assert_interactive(VOID_PARAM)1802 assert_interactive(VOID_PARAM)
1803 {
1804 if (interactive()) return;
1805 /* abort(); */
1806 }
1807
1808 /*
1809 * Home cursor (move to upper left corner of screen).
1810 */
1811 public void
home(VOID_PARAM)1812 home(VOID_PARAM)
1813 {
1814 assert_interactive();
1815 #if !MSDOS_COMPILER
1816 ltputs(sc_home, 1, putchr);
1817 #else
1818 flush();
1819 _settextposition(1,1);
1820 #endif
1821 }
1822
1823 /*
1824 * Add a blank line (called with cursor at home).
1825 * Should scroll the display down.
1826 */
1827 public void
add_line(VOID_PARAM)1828 add_line(VOID_PARAM)
1829 {
1830 assert_interactive();
1831 #if !MSDOS_COMPILER
1832 ltputs(sc_addline, sc_height, putchr);
1833 #else
1834 flush();
1835 #if MSDOS_COMPILER==MSOFTC
1836 _scrolltextwindow(_GSCROLLDOWN);
1837 _settextposition(1,1);
1838 #else
1839 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1840 movetext(1,1, sc_width,sc_height-1, 1,2);
1841 gotoxy(1,1);
1842 clreol();
1843 #else
1844 #if MSDOS_COMPILER==WIN32C
1845 {
1846 CHAR_INFO fillchar;
1847 SMALL_RECT rcSrc, rcClip;
1848 COORD new_org;
1849 CONSOLE_SCREEN_BUFFER_INFO csbi;
1850
1851 GetConsoleScreenBufferInfo(con_out,&csbi);
1852
1853 /* The clip rectangle is the entire visible screen. */
1854 rcClip.Left = csbi.srWindow.Left;
1855 rcClip.Top = csbi.srWindow.Top;
1856 rcClip.Right = csbi.srWindow.Right;
1857 rcClip.Bottom = csbi.srWindow.Bottom;
1858
1859 /* The source rectangle is the visible screen minus the last line. */
1860 rcSrc = rcClip;
1861 rcSrc.Bottom--;
1862
1863 /* Move the top left corner of the source window down one row. */
1864 new_org.X = rcSrc.Left;
1865 new_org.Y = rcSrc.Top + 1;
1866
1867 /* Fill the right character and attributes. */
1868 fillchar.Char.AsciiChar = ' ';
1869 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
1870 fillchar.Attributes = curr_attr;
1871 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar);
1872 _settextposition(1,1);
1873 }
1874 #endif
1875 #endif
1876 #endif
1877 #endif
1878 }
1879
1880 #if 0
1881 /*
1882 * Remove the n topmost lines and scroll everything below it in the
1883 * window upward. This is needed to stop leaking the topmost line
1884 * into the scrollback buffer when we go down-one-line (in WIN32).
1885 */
1886 public void
1887 remove_top(n)
1888 int n;
1889 {
1890 #if MSDOS_COMPILER==WIN32C
1891 SMALL_RECT rcSrc, rcClip;
1892 CHAR_INFO fillchar;
1893 COORD new_org;
1894 CONSOLE_SCREEN_BUFFER_INFO csbi; /* to get buffer info */
1895
1896 if (n >= sc_height - 1)
1897 {
1898 clear();
1899 home();
1900 return;
1901 }
1902
1903 flush();
1904
1905 GetConsoleScreenBufferInfo(con_out, &csbi);
1906
1907 /* Get the extent of all-visible-rows-but-the-last. */
1908 rcSrc.Left = csbi.srWindow.Left;
1909 rcSrc.Top = csbi.srWindow.Top + n;
1910 rcSrc.Right = csbi.srWindow.Right;
1911 rcSrc.Bottom = csbi.srWindow.Bottom;
1912
1913 /* Get the clip rectangle. */
1914 rcClip.Left = rcSrc.Left;
1915 rcClip.Top = csbi.srWindow.Top;
1916 rcClip.Right = rcSrc.Right;
1917 rcClip.Bottom = rcSrc.Bottom ;
1918
1919 /* Move the source window up n rows. */
1920 new_org.X = rcSrc.Left;
1921 new_org.Y = rcSrc.Top - n;
1922
1923 /* Fill the right character and attributes. */
1924 fillchar.Char.AsciiChar = ' ';
1925 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
1926 fillchar.Attributes = curr_attr;
1927
1928 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar);
1929
1930 /* Position cursor on first blank line. */
1931 goto_line(sc_height - n - 1);
1932 #endif
1933 }
1934 #endif
1935
1936 #if MSDOS_COMPILER==WIN32C
1937 /*
1938 * Clear the screen.
1939 */
1940 static void
win32_clear(VOID_PARAM)1941 win32_clear(VOID_PARAM)
1942 {
1943 /*
1944 * This will clear only the currently visible rows of the NT
1945 * console buffer, which means none of the precious scrollback
1946 * rows are touched making for faster scrolling. Note that, if
1947 * the window has fewer columns than the console buffer (i.e.
1948 * there is a horizontal scrollbar as well), the entire width
1949 * of the visible rows will be cleared.
1950 */
1951 COORD topleft;
1952 DWORD nchars;
1953 DWORD winsz;
1954 CONSOLE_SCREEN_BUFFER_INFO csbi;
1955
1956 /* get the number of cells in the current buffer */
1957 GetConsoleScreenBufferInfo(con_out, &csbi);
1958 winsz = csbi.dwSize.X * (csbi.srWindow.Bottom - csbi.srWindow.Top + 1);
1959 topleft.X = 0;
1960 topleft.Y = csbi.srWindow.Top;
1961
1962 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
1963 FillConsoleOutputCharacter(con_out, ' ', winsz, topleft, &nchars);
1964 FillConsoleOutputAttribute(con_out, curr_attr, winsz, topleft, &nchars);
1965 }
1966
1967 /*
1968 * Remove the n topmost lines and scroll everything below it in the
1969 * window upward.
1970 */
1971 public void
win32_scroll_up(n)1972 win32_scroll_up(n)
1973 int n;
1974 {
1975 SMALL_RECT rcSrc, rcClip;
1976 CHAR_INFO fillchar;
1977 COORD topleft;
1978 COORD new_org;
1979 DWORD nchars;
1980 DWORD size;
1981 CONSOLE_SCREEN_BUFFER_INFO csbi;
1982
1983 if (n <= 0)
1984 return;
1985
1986 if (n >= sc_height - 1)
1987 {
1988 win32_clear();
1989 _settextposition(1,1);
1990 return;
1991 }
1992
1993 /* Get the extent of what will remain visible after scrolling. */
1994 GetConsoleScreenBufferInfo(con_out, &csbi);
1995 rcSrc.Left = csbi.srWindow.Left;
1996 rcSrc.Top = csbi.srWindow.Top + n;
1997 rcSrc.Right = csbi.srWindow.Right;
1998 rcSrc.Bottom = csbi.srWindow.Bottom;
1999
2000 /* Get the clip rectangle. */
2001 rcClip.Left = rcSrc.Left;
2002 rcClip.Top = csbi.srWindow.Top;
2003 rcClip.Right = rcSrc.Right;
2004 rcClip.Bottom = rcSrc.Bottom ;
2005
2006 /* Move the source text to the top of the screen. */
2007 new_org.X = rcSrc.Left;
2008 new_org.Y = rcClip.Top;
2009
2010 /* Fill the right character and attributes. */
2011 fillchar.Char.AsciiChar = ' ';
2012 fillchar.Attributes = MAKEATTR(nm_fg_color, nm_bg_color);
2013
2014 /* Scroll the window. */
2015 SetConsoleTextAttribute(con_out, fillchar.Attributes);
2016 ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar);
2017
2018 /* Clear remaining lines at bottom. */
2019 topleft.X = csbi.dwCursorPosition.X;
2020 topleft.Y = rcSrc.Bottom - n;
2021 size = (n * csbi.dwSize.X) + (rcSrc.Right - topleft.X);
2022 FillConsoleOutputCharacter(con_out, ' ', size, topleft,
2023 &nchars);
2024 FillConsoleOutputAttribute(con_out, fillchar.Attributes, size, topleft,
2025 &nchars);
2026 SetConsoleTextAttribute(con_out, curr_attr);
2027
2028 /* Move cursor n lines up from where it was. */
2029 csbi.dwCursorPosition.Y -= n;
2030 SetConsoleCursorPosition(con_out, csbi.dwCursorPosition);
2031 }
2032 #endif
2033
2034 /*
2035 * Move cursor to lower left corner of screen.
2036 */
2037 public void
lower_left(VOID_PARAM)2038 lower_left(VOID_PARAM)
2039 {
2040 assert_interactive();
2041 #if !MSDOS_COMPILER
2042 ltputs(sc_lower_left, 1, putchr);
2043 #else
2044 flush();
2045 _settextposition(sc_height, 1);
2046 #endif
2047 }
2048
2049 /*
2050 * Move cursor to left position of current line.
2051 */
2052 public void
line_left(VOID_PARAM)2053 line_left(VOID_PARAM)
2054 {
2055 assert_interactive();
2056 #if !MSDOS_COMPILER
2057 ltputs(sc_return, 1, putchr);
2058 #else
2059 {
2060 int row;
2061 flush();
2062 #if MSDOS_COMPILER==WIN32C
2063 {
2064 CONSOLE_SCREEN_BUFFER_INFO scr;
2065 GetConsoleScreenBufferInfo(con_out, &scr);
2066 row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1;
2067 }
2068 #else
2069 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
2070 row = wherey();
2071 #else
2072 {
2073 struct rccoord tpos = _gettextposition();
2074 row = tpos.row;
2075 }
2076 #endif
2077 #endif
2078 _settextposition(row, 1);
2079 }
2080 #endif
2081 }
2082
2083 /*
2084 * Check if the console size has changed and reset internals
2085 * (in lieu of SIGWINCH for WIN32).
2086 */
2087 public void
check_winch(VOID_PARAM)2088 check_winch(VOID_PARAM)
2089 {
2090 #if MSDOS_COMPILER==WIN32C
2091 CONSOLE_SCREEN_BUFFER_INFO scr;
2092 COORD size;
2093
2094 if (con_out == INVALID_HANDLE_VALUE)
2095 return;
2096
2097 flush();
2098 GetConsoleScreenBufferInfo(con_out, &scr);
2099 size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1;
2100 size.X = scr.srWindow.Right - scr.srWindow.Left + 1;
2101 if (size.Y != sc_height || size.X != sc_width)
2102 {
2103 sc_height = size.Y;
2104 sc_width = size.X;
2105 if (!no_init && con_out_ours == con_out)
2106 SetConsoleScreenBufferSize(con_out, size);
2107 pos_init();
2108 wscroll = (sc_height + 1) / 2;
2109 screen_trashed = 1;
2110 }
2111 #endif
2112 }
2113
2114 /*
2115 * Goto a specific line on the screen.
2116 */
2117 public void
goto_line(sindex)2118 goto_line(sindex)
2119 int sindex;
2120 {
2121 assert_interactive();
2122 #if !MSDOS_COMPILER
2123 ltputs(tgoto(sc_move, 0, sindex), 1, putchr);
2124 #else
2125 flush();
2126 _settextposition(sindex+1, 1);
2127 #endif
2128 }
2129
2130 #if MSDOS_COMPILER==MSOFTC || MSDOS_COMPILER==BORLANDC
2131 /*
2132 * Create an alternate screen which is all white.
2133 * This screen is used to create a "flash" effect, by displaying it
2134 * briefly and then switching back to the normal screen.
2135 * {{ Yuck! There must be a better way to get a visual bell. }}
2136 */
2137 static void
create_flash(VOID_PARAM)2138 create_flash(VOID_PARAM)
2139 {
2140 #if MSDOS_COMPILER==MSOFTC
2141 struct videoconfig w;
2142 char *blanks;
2143 int row, col;
2144
2145 _getvideoconfig(&w);
2146 videopages = w.numvideopages;
2147 if (videopages < 2)
2148 {
2149 at_enter(AT_STANDOUT);
2150 at_exit();
2151 } else
2152 {
2153 _setactivepage(1);
2154 at_enter(AT_STANDOUT);
2155 blanks = (char *) ecalloc(w.numtextcols, sizeof(char));
2156 for (col = 0; col < w.numtextcols; col++)
2157 blanks[col] = ' ';
2158 for (row = w.numtextrows; row > 0; row--)
2159 _outmem(blanks, w.numtextcols);
2160 _setactivepage(0);
2161 _setvisualpage(0);
2162 free(blanks);
2163 at_exit();
2164 }
2165 #else
2166 #if MSDOS_COMPILER==BORLANDC
2167 int n;
2168
2169 whitescreen = (unsigned short *)
2170 malloc(sc_width * sc_height * sizeof(short));
2171 if (whitescreen == NULL)
2172 return;
2173 for (n = 0; n < sc_width * sc_height; n++)
2174 whitescreen[n] = 0x7020;
2175 #endif
2176 #endif
2177 flash_created = 1;
2178 }
2179 #endif /* MSDOS_COMPILER */
2180
2181 /*
2182 * Output the "visual bell", if there is one.
2183 */
2184 public void
vbell(VOID_PARAM)2185 vbell(VOID_PARAM)
2186 {
2187 #if !MSDOS_COMPILER
2188 if (*sc_visual_bell == '\0')
2189 return;
2190 ltputs(sc_visual_bell, sc_height, putchr);
2191 #else
2192 #if MSDOS_COMPILER==DJGPPC
2193 ScreenVisualBell();
2194 #else
2195 #if MSDOS_COMPILER==MSOFTC
2196 /*
2197 * Create a flash screen on the second video page.
2198 * Switch to that page, then switch back.
2199 */
2200 if (!flash_created)
2201 create_flash();
2202 if (videopages < 2)
2203 return;
2204 _setvisualpage(1);
2205 delay(100);
2206 _setvisualpage(0);
2207 #else
2208 #if MSDOS_COMPILER==BORLANDC
2209 unsigned short *currscreen;
2210
2211 /*
2212 * Get a copy of the current screen.
2213 * Display the flash screen.
2214 * Then restore the old screen.
2215 */
2216 if (!flash_created)
2217 create_flash();
2218 if (whitescreen == NULL)
2219 return;
2220 currscreen = (unsigned short *)
2221 malloc(sc_width * sc_height * sizeof(short));
2222 if (currscreen == NULL) return;
2223 gettext(1, 1, sc_width, sc_height, currscreen);
2224 puttext(1, 1, sc_width, sc_height, whitescreen);
2225 delay(100);
2226 puttext(1, 1, sc_width, sc_height, currscreen);
2227 free(currscreen);
2228 #else
2229 #if MSDOS_COMPILER==WIN32C
2230 /* paint screen with an inverse color */
2231 clear();
2232
2233 /* leave it displayed for 100 msec. */
2234 Sleep(100);
2235
2236 /* restore with a redraw */
2237 repaint();
2238 #endif
2239 #endif
2240 #endif
2241 #endif
2242 #endif
2243 }
2244
2245 /*
2246 * Make a noise.
2247 */
2248 static void
beep(VOID_PARAM)2249 beep(VOID_PARAM)
2250 {
2251 #if !MSDOS_COMPILER
2252 putchr(CONTROL('G'));
2253 #else
2254 #if MSDOS_COMPILER==WIN32C
2255 MessageBeep(0);
2256 #else
2257 write(1, "\7", 1);
2258 #endif
2259 #endif
2260 }
2261
2262 /*
2263 * Ring the terminal bell.
2264 */
2265 public void
bell(VOID_PARAM)2266 bell(VOID_PARAM)
2267 {
2268 if (quiet == VERY_QUIET)
2269 vbell();
2270 else
2271 beep();
2272 }
2273
2274 /*
2275 * Clear the screen.
2276 */
2277 public void
clear(VOID_PARAM)2278 clear(VOID_PARAM)
2279 {
2280 assert_interactive();
2281 #if !MSDOS_COMPILER
2282 ltputs(sc_clear, sc_height, putchr);
2283 #else
2284 flush();
2285 #if MSDOS_COMPILER==WIN32C
2286 win32_clear();
2287 #else
2288 _clearscreen(_GCLEARSCREEN);
2289 #endif
2290 #endif
2291 }
2292
2293 /*
2294 * Clear from the cursor to the end of the cursor's line.
2295 * {{ This must not move the cursor. }}
2296 */
2297 public void
clear_eol(VOID_PARAM)2298 clear_eol(VOID_PARAM)
2299 {
2300 /* assert_interactive();*/
2301 #if !MSDOS_COMPILER
2302 ltputs(sc_eol_clear, 1, putchr);
2303 #else
2304 #if MSDOS_COMPILER==MSOFTC
2305 short top, left;
2306 short bot, right;
2307 struct rccoord tpos;
2308
2309 flush();
2310 /*
2311 * Save current state.
2312 */
2313 tpos = _gettextposition();
2314 _gettextwindow(&top, &left, &bot, &right);
2315 /*
2316 * Set a temporary window to the current line,
2317 * from the cursor's position to the right edge of the screen.
2318 * Then clear that window.
2319 */
2320 _settextwindow(tpos.row, tpos.col, tpos.row, sc_width);
2321 _clearscreen(_GWINDOW);
2322 /*
2323 * Restore state.
2324 */
2325 _settextwindow(top, left, bot, right);
2326 _settextposition(tpos.row, tpos.col);
2327 #else
2328 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
2329 flush();
2330 clreol();
2331 #else
2332 #if MSDOS_COMPILER==WIN32C
2333 DWORD nchars;
2334 COORD cpos;
2335 CONSOLE_SCREEN_BUFFER_INFO scr;
2336
2337 flush();
2338 memset(&scr, 0, sizeof(scr));
2339 GetConsoleScreenBufferInfo(con_out, &scr);
2340 cpos.X = scr.dwCursorPosition.X;
2341 cpos.Y = scr.dwCursorPosition.Y;
2342 curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
2343 FillConsoleOutputAttribute(con_out, curr_attr,
2344 scr.dwSize.X - cpos.X, cpos, &nchars);
2345 FillConsoleOutputCharacter(con_out, ' ',
2346 scr.dwSize.X - cpos.X, cpos, &nchars);
2347 #endif
2348 #endif
2349 #endif
2350 #endif
2351 }
2352
2353 /*
2354 * Clear the current line.
2355 * Clear the screen if there's off-screen memory below the display.
2356 */
2357 static void
clear_eol_bot(VOID_PARAM)2358 clear_eol_bot(VOID_PARAM)
2359 {
2360 assert_interactive();
2361 #if MSDOS_COMPILER
2362 clear_eol();
2363 #else
2364 if (below_mem)
2365 ltputs(sc_eos_clear, 1, putchr);
2366 else
2367 ltputs(sc_eol_clear, 1, putchr);
2368 #endif
2369 }
2370
2371 /*
2372 * Clear the bottom line of the display.
2373 * Leave the cursor at the beginning of the bottom line.
2374 */
2375 public void
clear_bot(VOID_PARAM)2376 clear_bot(VOID_PARAM)
2377 {
2378 /*
2379 * If we're in a non-normal attribute mode, temporarily exit
2380 * the mode while we do the clear. Some terminals fill the
2381 * cleared area with the current attribute.
2382 */
2383 if (oldbot)
2384 lower_left();
2385 else
2386 line_left();
2387
2388 if (attrmode == AT_NORMAL)
2389 clear_eol_bot();
2390 else
2391 {
2392 int saved_attrmode = attrmode;
2393
2394 at_exit();
2395 clear_eol_bot();
2396 at_enter(saved_attrmode);
2397 }
2398 }
2399
2400 /*
2401 * Color string may be "x[y]" where x and y are 4-bit color chars,
2402 * or "N[.M]" where N and M are decimal integers>
2403 * Any of x,y,N,M may also be "-" to mean "unchanged".
2404 */
2405
2406 /*
2407 * Parse a 4-bit color char.
2408 */
2409 static int
parse_color4(ch)2410 parse_color4(ch)
2411 char ch;
2412 {
2413 switch (ch)
2414 {
2415 case 'k': return 0;
2416 case 'r': return CV_RED;
2417 case 'g': return CV_GREEN;
2418 case 'y': return CV_RED|CV_GREEN;
2419 case 'b': return CV_BLUE;
2420 case 'm': return CV_RED|CV_BLUE;
2421 case 'c': return CV_GREEN|CV_BLUE;
2422 case 'w': return CV_RED|CV_GREEN|CV_BLUE;
2423 case 'K': return 0|CV_BRIGHT;
2424 case 'R': return CV_RED|CV_BRIGHT;
2425 case 'G': return CV_GREEN|CV_BRIGHT;
2426 case 'Y': return CV_RED|CV_GREEN|CV_BRIGHT;
2427 case 'B': return CV_BLUE|CV_BRIGHT;
2428 case 'M': return CV_RED|CV_BLUE|CV_BRIGHT;
2429 case 'C': return CV_GREEN|CV_BLUE|CV_BRIGHT;
2430 case 'W': return CV_RED|CV_GREEN|CV_BLUE|CV_BRIGHT;
2431 case '-': return CV_NOCHANGE;
2432 default: return CV_ERROR;
2433 }
2434 }
2435
2436 /*
2437 * Parse a color as a decimal integer.
2438 */
2439 static int
parse_color6(ps)2440 parse_color6(ps)
2441 char **ps;
2442 {
2443 if (**ps == '-')
2444 {
2445 (*ps)++;
2446 return CV_NOCHANGE;
2447 } else
2448 {
2449 char *ops = *ps;
2450 int color = lstrtoi(ops, ps);
2451 if (*ps == ops)
2452 return CV_ERROR;
2453 return color;
2454 }
2455 }
2456
2457 /*
2458 * Parse a color pair and return the foreground/background values.
2459 * Return type of color specifier:
2460 * CV_4BIT: fg/bg values are OR of CV_{RGB} bits.
2461 * CV_6BIT: fg/bg values are integers entered by user.
2462 */
2463 public COLOR_TYPE
parse_color(str,p_fg,p_bg)2464 parse_color(str, p_fg, p_bg)
2465 char *str;
2466 int *p_fg;
2467 int *p_bg;
2468 {
2469 int fg;
2470 int bg;
2471 COLOR_TYPE type = CT_NULL;
2472
2473 if (str == NULL || *str == '\0')
2474 return CT_NULL;
2475 if (*str == '+')
2476 str++; /* ignore leading + */
2477
2478 fg = parse_color4(str[0]);
2479 bg = parse_color4((strlen(str) < 2) ? '-' : str[1]);
2480 if (fg != CV_ERROR && bg != CV_ERROR)
2481 type = CT_4BIT;
2482 else
2483 {
2484 fg = parse_color6(&str);
2485 bg = (fg != CV_ERROR && *str++ == '.') ? parse_color6(&str) : CV_NOCHANGE;
2486 if (fg != CV_ERROR && bg != CV_ERROR)
2487 type = CT_6BIT;
2488 }
2489 if (p_fg != NULL) *p_fg = fg;
2490 if (p_bg != NULL) *p_bg = bg;
2491 return type;
2492 }
2493
2494 #if !MSDOS_COMPILER
2495
2496 static int
sgr_color(color)2497 sgr_color(color)
2498 int color;
2499 {
2500 switch (color)
2501 {
2502 case 0: return 30;
2503 case CV_RED: return 31;
2504 case CV_GREEN: return 32;
2505 case CV_RED|CV_GREEN: return 33;
2506 case CV_BLUE: return 34;
2507 case CV_RED|CV_BLUE: return 35;
2508 case CV_GREEN|CV_BLUE: return 36;
2509 case CV_RED|CV_GREEN|CV_BLUE: return 37;
2510
2511 case CV_BRIGHT: return 90;
2512 case CV_RED|CV_BRIGHT: return 91;
2513 case CV_GREEN|CV_BRIGHT: return 92;
2514 case CV_RED|CV_GREEN|CV_BRIGHT: return 93;
2515 case CV_BLUE|CV_BRIGHT: return 94;
2516 case CV_RED|CV_BLUE|CV_BRIGHT: return 95;
2517 case CV_GREEN|CV_BLUE|CV_BRIGHT: return 96;
2518 case CV_RED|CV_GREEN|CV_BLUE|CV_BRIGHT: return 97;
2519
2520 default: return color;
2521 }
2522 }
2523
2524 static void
tput_fmt(fmt,color,f_putc)2525 tput_fmt(fmt, color, f_putc)
2526 char *fmt;
2527 int color;
2528 int (*f_putc)(int);
2529 {
2530 char buf[32];
2531 if (color == attrcolor)
2532 return;
2533 SNPRINTF1(buf, sizeof(buf), fmt, color);
2534 ltputs(buf, 1, f_putc);
2535 attrcolor = color;
2536 }
2537
2538 static void
tput_color(str,f_putc)2539 tput_color(str, f_putc)
2540 char *str;
2541 int (*f_putc)(int);
2542 {
2543 int fg;
2544 int bg;
2545
2546 if (str != NULL && strcmp(str, "*") == 0)
2547 {
2548 /* Special case: reset to normal */
2549 tput_fmt(ESCS"[m", -1, f_putc);
2550 return;
2551 }
2552 switch (parse_color(str, &fg, &bg))
2553 {
2554 case CT_4BIT:
2555 if (fg >= 0)
2556 tput_fmt(ESCS"[%dm", sgr_color(fg), f_putc);
2557 if (bg >= 0)
2558 tput_fmt(ESCS"[%dm", sgr_color(bg)+10, f_putc);
2559 break;
2560 case CT_6BIT:
2561 if (fg >= 0)
2562 tput_fmt(ESCS"[38;5;%dm", fg, f_putc);
2563 if (bg >= 0)
2564 tput_fmt(ESCS"[48;5;%dm", bg, f_putc);
2565 break;
2566 default:
2567 break;
2568 }
2569 }
2570
2571 static void
tput_inmode(mode_str,attr,attr_bit,f_putc)2572 tput_inmode(mode_str, attr, attr_bit, f_putc)
2573 char *mode_str;
2574 int attr;
2575 int attr_bit;
2576 int (*f_putc)(int);
2577 {
2578 char *color_str;
2579 if ((attr & attr_bit) == 0)
2580 return;
2581 color_str = get_color_map(attr_bit);
2582 if (color_str == NULL || *color_str == '\0' || *color_str == '+')
2583 {
2584 ltputs(mode_str, 1, f_putc);
2585 if (color_str == NULL || *color_str++ != '+')
2586 return;
2587 }
2588 /* Color overrides mode string */
2589 tput_color(color_str, f_putc);
2590 }
2591
2592 static void
tput_outmode(mode_str,attr_bit,f_putc)2593 tput_outmode(mode_str, attr_bit, f_putc)
2594 char *mode_str;
2595 int attr_bit;
2596 int (*f_putc)(int);
2597 {
2598 if ((attrmode & attr_bit) == 0)
2599 return;
2600 ltputs(mode_str, 1, f_putc);
2601 }
2602
2603 #else /* MSDOS_COMPILER */
2604
2605 #if MSDOS_COMPILER==WIN32C
2606 static int
WIN32put_fmt(fmt,color)2607 WIN32put_fmt(fmt, color)
2608 char *fmt;
2609 int color;
2610 {
2611 char buf[16];
2612 int len = SNPRINTF1(buf, sizeof(buf), fmt, color);
2613 WIN32textout(buf, len);
2614 return TRUE;
2615 }
2616 #endif
2617
2618 static int
win_set_color(attr)2619 win_set_color(attr)
2620 int attr;
2621 {
2622 int fg;
2623 int bg;
2624 int out = FALSE;
2625 char *str = get_color_map(attr);
2626 if (str == NULL || str[0] == '\0')
2627 return FALSE;
2628 switch (parse_color(str, &fg, &bg))
2629 {
2630 case CT_4BIT:
2631 if (fg >= 0 && bg >= 0)
2632 {
2633 SETCOLORS(fg, bg);
2634 out = TRUE;
2635 } else if (fg >= 0)
2636 {
2637 SET_FG_COLOR(fg);
2638 out = TRUE;
2639 } else if (bg >= 0)
2640 {
2641 SET_BG_COLOR(bg);
2642 out = TRUE;
2643 }
2644 break;
2645 #if MSDOS_COMPILER==WIN32C
2646 case CT_6BIT:
2647 if (vt_enabled)
2648 {
2649 if (fg > 0)
2650 out = WIN32put_fmt(ESCS"[38;5;%dm", fg);
2651 if (bg > 0)
2652 out = WIN32put_fmt(ESCS"[48;5;%dm", bg);
2653 }
2654 break;
2655 #endif
2656 default:
2657 break;
2658 }
2659 return out;
2660 }
2661
2662 #endif /* MSDOS_COMPILER */
2663
2664 public void
at_enter(attr)2665 at_enter(attr)
2666 int attr;
2667 {
2668 attr = apply_at_specials(attr);
2669 #if !MSDOS_COMPILER
2670 /* The one with the most priority is last. */
2671 tput_inmode(sc_u_in, attr, AT_UNDERLINE, putchr);
2672 tput_inmode(sc_b_in, attr, AT_BOLD, putchr);
2673 tput_inmode(sc_bl_in, attr, AT_BLINK, putchr);
2674 /* Don't use standout and color at the same time. */
2675 if (use_color && (attr & AT_COLOR))
2676 tput_color(get_color_map(attr), putchr);
2677 else
2678 tput_inmode(sc_s_in, attr, AT_STANDOUT, putchr);
2679 #else
2680 flush();
2681 /* The one with the most priority is first. */
2682 if ((attr & AT_COLOR) && use_color)
2683 {
2684 win_set_color(attr);
2685 } else if (attr & AT_STANDOUT)
2686 {
2687 SETCOLORS(so_fg_color, so_bg_color);
2688 } else if (attr & AT_BLINK)
2689 {
2690 SETCOLORS(bl_fg_color, bl_bg_color);
2691 } else if (attr & AT_BOLD)
2692 {
2693 SETCOLORS(bo_fg_color, bo_bg_color);
2694 } else if (attr & AT_UNDERLINE)
2695 {
2696 SETCOLORS(ul_fg_color, ul_bg_color);
2697 }
2698 #endif
2699 attrmode = attr;
2700 }
2701
2702 public void
at_exit(VOID_PARAM)2703 at_exit(VOID_PARAM)
2704 {
2705 #if !MSDOS_COMPILER
2706 /* Undo things in the reverse order we did them. */
2707 tput_color("*", putchr);
2708 tput_outmode(sc_s_out, AT_STANDOUT, putchr);
2709 tput_outmode(sc_bl_out, AT_BLINK, putchr);
2710 tput_outmode(sc_b_out, AT_BOLD, putchr);
2711 tput_outmode(sc_u_out, AT_UNDERLINE, putchr);
2712 #else
2713 flush();
2714 SETCOLORS(nm_fg_color, nm_bg_color);
2715 #endif
2716 attrmode = AT_NORMAL;
2717 }
2718
2719 public void
at_switch(attr)2720 at_switch(attr)
2721 int attr;
2722 {
2723 int new_attrmode = apply_at_specials(attr);
2724 int ignore_modes = AT_ANSI;
2725
2726 if ((new_attrmode & ~ignore_modes) != (attrmode & ~ignore_modes))
2727 {
2728 at_exit();
2729 at_enter(attr);
2730 }
2731 }
2732
2733 public int
is_at_equiv(attr1,attr2)2734 is_at_equiv(attr1, attr2)
2735 int attr1;
2736 int attr2;
2737 {
2738 attr1 = apply_at_specials(attr1);
2739 attr2 = apply_at_specials(attr2);
2740
2741 return (attr1 == attr2);
2742 }
2743
2744 public int
apply_at_specials(attr)2745 apply_at_specials(attr)
2746 int attr;
2747 {
2748 if (attr & AT_BINARY)
2749 attr |= binattr;
2750 if (attr & AT_HILITE)
2751 attr |= AT_STANDOUT;
2752 attr &= ~(AT_BINARY|AT_HILITE);
2753
2754 return attr;
2755 }
2756
2757 /*
2758 * Output a plain backspace, without erasing the previous char.
2759 */
2760 public void
putbs(VOID_PARAM)2761 putbs(VOID_PARAM)
2762 {
2763 if (termcap_debug)
2764 putstr("<bs>");
2765 else
2766 {
2767 #if !MSDOS_COMPILER
2768 ltputs(sc_backspace, 1, putchr);
2769 #else
2770 int row, col;
2771
2772 flush();
2773 {
2774 #if MSDOS_COMPILER==MSOFTC
2775 struct rccoord tpos;
2776 tpos = _gettextposition();
2777 row = tpos.row;
2778 col = tpos.col;
2779 #else
2780 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
2781 row = wherey();
2782 col = wherex();
2783 #else
2784 #if MSDOS_COMPILER==WIN32C
2785 CONSOLE_SCREEN_BUFFER_INFO scr;
2786 GetConsoleScreenBufferInfo(con_out, &scr);
2787 row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1;
2788 col = scr.dwCursorPosition.X - scr.srWindow.Left + 1;
2789 #endif
2790 #endif
2791 #endif
2792 }
2793 if (col <= 1)
2794 return;
2795 _settextposition(row, col-1);
2796 #endif /* MSDOS_COMPILER */
2797 }
2798 }
2799
2800 #if MSDOS_COMPILER==WIN32C
2801 /*
2802 * Determine whether an input character is waiting to be read.
2803 */
2804 public int
win32_kbhit(VOID_PARAM)2805 win32_kbhit(VOID_PARAM)
2806 {
2807 INPUT_RECORD ip;
2808 DWORD read;
2809
2810 if (keyCount > 0)
2811 return (TRUE);
2812
2813 currentKey.ascii = 0;
2814 currentKey.scan = 0;
2815
2816 if (x11mouseCount > 0)
2817 {
2818 currentKey.ascii = x11mousebuf[x11mousePos++];
2819 --x11mouseCount;
2820 keyCount = 1;
2821 return (TRUE);
2822 }
2823
2824 /*
2825 * Wait for a real key-down event, but
2826 * ignore SHIFT and CONTROL key events.
2827 */
2828 do
2829 {
2830 PeekConsoleInput(tty, &ip, 1, &read);
2831 if (read == 0)
2832 return (FALSE);
2833 ReadConsoleInput(tty, &ip, 1, &read);
2834 /* generate an X11 mouse sequence from the mouse event */
2835 if (mousecap && ip.EventType == MOUSE_EVENT &&
2836 ip.Event.MouseEvent.dwEventFlags != MOUSE_MOVED)
2837 {
2838 x11mousebuf[3] = X11MOUSE_OFFSET + ip.Event.MouseEvent.dwMousePosition.X + 1;
2839 x11mousebuf[4] = X11MOUSE_OFFSET + ip.Event.MouseEvent.dwMousePosition.Y + 1;
2840 switch (ip.Event.MouseEvent.dwEventFlags)
2841 {
2842 case 0: /* press or release */
2843 if (ip.Event.MouseEvent.dwButtonState == 0)
2844 x11mousebuf[2] = X11MOUSE_OFFSET + X11MOUSE_BUTTON_REL;
2845 else if (ip.Event.MouseEvent.dwButtonState & (FROM_LEFT_3RD_BUTTON_PRESSED | FROM_LEFT_4TH_BUTTON_PRESSED))
2846 continue;
2847 else
2848 x11mousebuf[2] = X11MOUSE_OFFSET + X11MOUSE_BUTTON1 + ((int)ip.Event.MouseEvent.dwButtonState << 1);
2849 break;
2850 case MOUSE_WHEELED:
2851 x11mousebuf[2] = X11MOUSE_OFFSET + (((int)ip.Event.MouseEvent.dwButtonState < 0) ? X11MOUSE_WHEEL_DOWN : X11MOUSE_WHEEL_UP);
2852 break;
2853 default:
2854 continue;
2855 }
2856 x11mousePos = 0;
2857 x11mouseCount = 5;
2858 currentKey.ascii = ESC;
2859 keyCount = 1;
2860 return (TRUE);
2861 }
2862 } while (ip.EventType != KEY_EVENT ||
2863 ip.Event.KeyEvent.bKeyDown != TRUE ||
2864 ip.Event.KeyEvent.wVirtualScanCode == 0 ||
2865 ip.Event.KeyEvent.wVirtualKeyCode == VK_SHIFT ||
2866 ip.Event.KeyEvent.wVirtualKeyCode == VK_CONTROL ||
2867 ip.Event.KeyEvent.wVirtualKeyCode == VK_MENU);
2868
2869 currentKey.ascii = ip.Event.KeyEvent.uChar.AsciiChar;
2870 currentKey.scan = ip.Event.KeyEvent.wVirtualScanCode;
2871 keyCount = ip.Event.KeyEvent.wRepeatCount;
2872
2873 if (ip.Event.KeyEvent.dwControlKeyState &
2874 (LEFT_ALT_PRESSED | RIGHT_ALT_PRESSED))
2875 {
2876 switch (currentKey.scan)
2877 {
2878 case PCK_ALT_E: /* letter 'E' */
2879 currentKey.ascii = 0;
2880 break;
2881 }
2882 } else if (ip.Event.KeyEvent.dwControlKeyState &
2883 (LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED))
2884 {
2885 switch (currentKey.scan)
2886 {
2887 case PCK_RIGHT: /* right arrow */
2888 currentKey.scan = PCK_CTL_RIGHT;
2889 break;
2890 case PCK_LEFT: /* left arrow */
2891 currentKey.scan = PCK_CTL_LEFT;
2892 break;
2893 case PCK_DELETE: /* delete */
2894 currentKey.scan = PCK_CTL_DELETE;
2895 break;
2896 }
2897 } else if (ip.Event.KeyEvent.dwControlKeyState & SHIFT_PRESSED)
2898 {
2899 switch (currentKey.scan)
2900 {
2901 case PCK_SHIFT_TAB: /* tab */
2902 currentKey.ascii = 0;
2903 break;
2904 }
2905 }
2906
2907 return (TRUE);
2908 }
2909
2910 /*
2911 * Read a character from the keyboard.
2912 */
2913 public char
WIN32getch(VOID_PARAM)2914 WIN32getch(VOID_PARAM)
2915 {
2916 int ascii;
2917
2918 if (pending_scancode)
2919 {
2920 pending_scancode = 0;
2921 return ((char)(currentKey.scan & 0x00FF));
2922 }
2923
2924 do {
2925 while (win32_kbhit() == FALSE)
2926 {
2927 Sleep(20);
2928 if (ABORT_SIGS())
2929 return ('\003');
2930 continue;
2931 }
2932 keyCount --;
2933 ascii = currentKey.ascii;
2934 /*
2935 * On PC's, the extended keys return a 2 byte sequence beginning
2936 * with '00', so if the ascii code is 00, the next byte will be
2937 * the lsb of the scan code.
2938 */
2939 pending_scancode = (ascii == 0x00);
2940 } while (pending_scancode &&
2941 (currentKey.scan == PCK_CAPS_LOCK || currentKey.scan == PCK_NUM_LOCK));
2942
2943 return ((char)ascii);
2944 }
2945 #endif
2946
2947 #if MSDOS_COMPILER
2948 /*
2949 */
2950 public void
WIN32setcolors(fg,bg)2951 WIN32setcolors(fg, bg)
2952 int fg;
2953 int bg;
2954 {
2955 SETCOLORS(fg, bg);
2956 }
2957
2958 /*
2959 */
2960 public void
WIN32textout(text,len)2961 WIN32textout(text, len)
2962 char *text;
2963 int len;
2964 {
2965 #if MSDOS_COMPILER==WIN32C
2966 DWORD written;
2967 if (utf_mode == 2)
2968 {
2969 /*
2970 * We've got UTF-8 text in a non-UTF-8 console. Convert it to
2971 * wide and use WriteConsoleW.
2972 */
2973 WCHAR wtext[1024];
2974 len = MultiByteToWideChar(CP_UTF8, 0, text, len, wtext,
2975 sizeof(wtext)/sizeof(*wtext));
2976 WriteConsoleW(con_out, wtext, len, &written, NULL);
2977 } else
2978 WriteConsole(con_out, text, len, &written, NULL);
2979 #else
2980 char c = text[len];
2981 text[len] = '\0';
2982 cputs(text);
2983 text[len] = c;
2984 #endif
2985 }
2986 #endif
2987
2988