2 * Copyright (C) 1984-2008 Mark Nudelman
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.
7 * For more information about less, or for information on how to
8 * contact the author, see the README file.
13 * Routines which deal with the characteristics of the terminal.
14 * Uses termcap to be as terminal-independent as possible.
22 #if MSDOS_COMPILER==MSOFTC
25 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
27 #if MSDOS_COMPILER==DJGPPC
32 #if MSDOS_COMPILER==WIN32C
42 #include <sys/ioctl.h>
45 #if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS
66 #include <sys/signal.h>
70 #include <sys/stream.h>
76 #endif /* MSDOS_COMPILER */
79 * Check for broken termios package that forces you to manually
80 * set the line discipline.
83 #define MUST_SET_LINE_DISCIPLINE 1
85 #define MUST_SET_LINE_DISCIPLINE 0
89 #define DEFAULT_TERM "ansi"
90 static char *windowid
;
92 #define DEFAULT_TERM "unknown"
95 #if MSDOS_COMPILER==MSOFTC
96 static int videopages
;
97 static long msec_loops
;
98 static int flash_created
= 0;
99 #define SETCOLORS(fg,bg) { _settextcolor(fg); _setbkcolor(bg); }
102 #if MSDOS_COMPILER==BORLANDC
103 static unsigned short *whitescreen
;
104 static int flash_created
= 0;
106 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
107 #define _settextposition(y,x) gotoxy(x,y)
108 #define _clearscreen(m) clrscr()
109 #define _outtext(s) cputs(s)
110 #define SETCOLORS(fg,bg) { textcolor(fg); textbackground(bg); }
111 extern int sc_height
;
114 #if MSDOS_COMPILER==WIN32C
121 static int keyCount
= 0;
122 static WORD curr_attr
;
123 static int pending_scancode
= 0;
124 static WORD
*whitescreen
;
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 */
131 static void win32_init_term();
132 static void win32_deinit_term();
134 #define FG_COLORS (FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_INTENSITY)
135 #define BG_COLORS (BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE | BACKGROUND_INTENSITY)
136 #define MAKEATTR(fg,bg) ((WORD)((fg)|((bg)<<4)))
137 #define SETCOLORS(fg,bg) { curr_attr = MAKEATTR(fg,bg); \
138 if (SetConsoleTextAttribute(con_out, curr_attr) == 0) \
139 error("SETCOLORS failed"); }
143 public int nm_fg_color
; /* Color of normal text */
144 public int nm_bg_color
;
145 public int bo_fg_color
; /* Color of bold text */
146 public int bo_bg_color
;
147 public int ul_fg_color
; /* Color of underlined text */
148 public int ul_bg_color
;
149 public int so_fg_color
; /* Color of standout text */
150 public int so_bg_color
;
151 public int bl_fg_color
; /* Color of blinking text */
152 public int bl_bg_color
;
153 static int sy_fg_color
; /* Color of system text (before less) */
154 static int sy_bg_color
;
159 * Strings passed to tputs() to do various terminal functions.
162 *sc_pad
, /* Pad string */
163 *sc_home
, /* Cursor home */
164 *sc_addline
, /* Add line, scroll down following lines */
165 *sc_lower_left
, /* Cursor to last line, first column */
166 *sc_return
, /* Cursor to beginning of current line */
167 *sc_move
, /* General cursor positioning */
168 *sc_clear
, /* Clear screen */
169 *sc_eol_clear
, /* Clear to end of line */
170 *sc_eos_clear
, /* Clear to end of screen */
171 *sc_s_in
, /* Enter standout (highlighted) mode */
172 *sc_s_out
, /* Exit standout mode */
173 *sc_u_in
, /* Enter underline mode */
174 *sc_u_out
, /* Exit underline mode */
175 *sc_b_in
, /* Enter bold mode */
176 *sc_b_out
, /* Exit bold mode */
177 *sc_bl_in
, /* Enter blink mode */
178 *sc_bl_out
, /* Exit blink mode */
179 *sc_visual_bell
, /* Visual bell (flash screen) sequence */
180 *sc_backspace
, /* Backspace cursor */
181 *sc_s_keypad
, /* Start keypad mode */
182 *sc_e_keypad
, /* End keypad mode */
183 *sc_init
, /* Startup terminal initialization */
184 *sc_deinit
; /* Exit terminal de-initialization */
187 static int init_done
= 0;
189 public int auto_wrap
; /* Terminal does \r\n when write past margin */
190 public int ignaw
; /* Terminal ignores \n immediately after wrap */
191 public int erase_char
; /* The user's erase char */
192 public int erase2_char
; /* The user's other erase char */
193 public int kill_char
; /* The user's line-kill char */
194 public int werase_char
; /* The user's word-erase char */
195 public int sc_width
, sc_height
; /* Height & width of screen */
196 public int bo_s_width
, bo_e_width
; /* Printing width of boldface seq */
197 public int ul_s_width
, ul_e_width
; /* Printing width of underline seq */
198 public int so_s_width
, so_e_width
; /* Printing width of standout seq */
199 public int bl_s_width
, bl_e_width
; /* Printing width of blink seq */
200 public int above_mem
, below_mem
; /* Memory retained above/below screen */
201 public int can_goto_line
; /* Can move cursor to any line */
202 public int clear_bg
; /* Clear fills with background color */
203 public int missing_cap
= 0; /* Some capability is missing */
205 static int attrmode
= AT_NORMAL
;
209 static char *cheaper();
210 static void tmodes();
214 * These two variables are sometimes defined in,
215 * and needed by, the termcap library.
217 #if MUST_DEFINE_OSPEED
218 extern short ospeed
; /* Terminal output baud rate */
219 extern char PC
; /* Pad character */
226 extern int quiet
; /* If VERY_QUIET, use visual bell for bell */
227 extern int no_back_scroll
;
230 extern int no_keypad
;
233 extern int screen_trashed
;
235 extern int top_scroll
;
238 extern int hilite_search
;
241 extern char *tgetstr();
242 extern char *tgoto();
246 * Change terminal to "raw mode", or restore to "normal" mode.
248 * 1. An outstanding read will complete on receipt of a single keystroke.
249 * 2. Input is not echoed.
250 * 3. On output, \n is mapped to \r\n.
251 * 4. \t is NOT expanded into spaces.
252 * 5. Signal-causing characters such as ctrl-C (interrupt),
253 * etc. are NOT disabled.
254 * It doesn't matter whether an input \n is mapped to \r, or vice versa.
260 static int curr_on
= 0;
264 erase2_char
= '\b'; /* in case OS doesn't know about erase2 */
265 #if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS
268 static struct termios save_term
;
269 static int saved_term
= 0;
274 * Get terminal modes.
279 * Save modes and set certain variables dependent on modes.
287 switch (cfgetospeed(&s
))
290 case B0
: ospeed
= 0; break;
293 case B50
: ospeed
= 1; break;
296 case B75
: ospeed
= 2; break;
299 case B110
: ospeed
= 3; break;
302 case B134
: ospeed
= 4; break;
305 case B150
: ospeed
= 5; break;
308 case B200
: ospeed
= 6; break;
311 case B300
: ospeed
= 7; break;
314 case B600
: ospeed
= 8; break;
317 case B1200
: ospeed
= 9; break;
320 case B1800
: ospeed
= 10; break;
323 case B2400
: ospeed
= 11; break;
326 case B4800
: ospeed
= 12; break;
329 case B9600
: ospeed
= 13; break;
332 case EXTA
: ospeed
= 14; break;
335 case EXTB
: ospeed
= 15; break;
338 case B57600
: ospeed
= 16; break;
341 case B115200
: ospeed
= 17; break;
346 erase_char
= s
.c_cc
[VERASE
];
348 erase2_char
= s
.c_cc
[VERASE2
];
350 kill_char
= s
.c_cc
[VKILL
];
352 werase_char
= s
.c_cc
[VWERASE
];
354 werase_char
= CONTROL('W');
358 * Set the modes to the way we want them.
420 #if MUST_SET_LINE_DISCIPLINE
422 * System's termios is broken; need to explicitly
423 * request TERMIODISC line discipline.
425 s
.c_line
= TERMIODISC
;
430 * Restore saved modes.
437 tcsetattr(tty
, TCSADRAIN
, &s
);
438 #if MUST_SET_LINE_DISCIPLINE
442 * Broken termios *ignores* any line discipline
443 * except TERMIODISC. A different old line discipline
444 * is therefore not restored, yet. Restore the old
445 * line discipline by hand.
447 ioctl(tty
, TIOCSETD
, &save_term
.c_line
);
455 static struct termio save_term
;
456 static int saved_term
= 0;
461 * Get terminal modes.
463 ioctl(tty
, TCGETA
, &s
);
466 * Save modes and set certain variables dependent on modes.
474 ospeed
= s
.c_cflag
& CBAUD
;
476 erase_char
= s
.c_cc
[VERASE
];
477 kill_char
= s
.c_cc
[VKILL
];
479 werase_char
= s
.c_cc
[VWERASE
];
481 werase_char
= CONTROL('W');
485 * Set the modes to the way we want them.
487 s
.c_lflag
&= ~(ICANON
|ECHO
|ECHOE
|ECHOK
|ECHONL
);
488 s
.c_oflag
|= (OPOST
|ONLCR
|TAB3
);
489 s
.c_oflag
&= ~(OCRNL
|ONOCR
|ONLRET
);
495 * Restore saved modes.
499 ioctl(tty
, TCSETAW
, &s
);
505 static struct sgttyb save_term
;
506 static int saved_term
= 0;
511 * Get terminal modes.
513 ioctl(tty
, TIOCGETP
, &s
);
516 * Save modes and set certain variables dependent on modes.
524 ospeed
= s
.sg_ospeed
;
526 erase_char
= s
.sg_erase
;
527 kill_char
= s
.sg_kill
;
528 werase_char
= CONTROL('W');
531 * Set the modes to the way we want them.
533 s
.sg_flags
|= CBREAK
;
534 s
.sg_flags
&= ~(ECHO
|XTABS
);
538 * Restore saved modes.
542 ioctl(tty
, TIOCSETN
, &s
);
548 static struct sgbuf save_term
;
549 static int saved_term
= 0;
554 * Get terminal modes.
559 * Save modes and set certain variables dependent on modes.
566 erase_char
= s
.sg_bspch
;
567 kill_char
= s
.sg_dlnch
;
568 werase_char
= CONTROL('W');
571 * Set the modes to the way we want them.
580 * Restore saved modes.
587 /* MS-DOS, Windows, or OS2 */
590 LSIGNAL(SIGINT
, SIG_IGN
);
593 #if MSDOS_COMPILER==DJGPPC
594 kill_char
= CONTROL('U');
596 * So that when we shell out or run another program, its
597 * stdin is in cooked mode. We do not switch stdin to binary
598 * mode if fd0 is zero, since that means we were called before
599 * tty was reopened in open_getchr, in which case we would be
600 * changing the original stdin device outside less.
603 setmode(0, on
? O_BINARY
: O_TEXT
);
607 werase_char
= CONTROL('W');
617 * Some glue to prevent calling termcap functions if tgetent() failed.
628 s
= lgetenv("LESS_TERMCAP_DEBUG");
629 if (s
!= NULL
&& *s
!= '\0')
631 struct env
{ struct env
*next
; char *name
; char *value
; };
632 static struct env
*envs
= NULL
;
634 for (p
= envs
; p
!= NULL
; p
= p
->next
)
635 if (strcmp(p
->name
, capname
) == 0)
637 p
= (struct env
*) ecalloc(1, sizeof(struct env
));
638 p
->name
= save(capname
);
639 p
->value
= (char *) ecalloc(strlen(capname
)+3, sizeof(char));
640 sprintf(p
->value
, "<%s>", capname
);
645 strcpy(name
, "LESS_TERMCAP_");
646 strcat(name
, capname
);
647 return (lgetenv(name
));
656 if ((s
= ltget_env(capname
)) != NULL
)
657 return (*s
!= '\0' && *s
!= '0');
660 return (tgetflag(capname
));
669 if ((s
= ltget_env(capname
)) != NULL
)
673 return (tgetnum(capname
));
677 ltgetstr(capname
, pp
)
683 if ((s
= ltget_env(capname
)) != NULL
)
687 return (tgetstr(capname
, pp
));
689 #endif /* MSDOS_COMPILER */
692 * Get size of the output screen.
704 #define DEF_SC_WIDTH 80
706 #define DEF_SC_HEIGHT 25
708 #define DEF_SC_HEIGHT 24
712 sys_width
= sys_height
= 0;
714 #if MSDOS_COMPILER==MSOFTC
716 struct videoconfig w
;
718 sys_height
= w
.numtextrows
;
719 sys_width
= w
.numtextcols
;
722 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
726 sys_height
= w
.screenheight
;
727 sys_width
= w
.screenwidth
;
730 #if MSDOS_COMPILER==WIN32C
732 CONSOLE_SCREEN_BUFFER_INFO scr
;
733 GetConsoleScreenBufferInfo(con_out
, &scr
);
734 sys_height
= scr
.srWindow
.Bottom
- scr
.srWindow
.Top
+ 1;
735 sys_width
= scr
.srWindow
.Right
- scr
.srWindow
.Left
+ 1;
745 * When using terminal emulators for XFree86/OS2, the
746 * _scrsize function does not work well.
747 * Call the scrsize.exe program to get the window size.
749 windowid
= getenv("WINDOWID");
750 if (windowid
!= NULL
)
752 FILE *fd
= popen("scrsize", "rt");
756 fscanf(fd
, "%i %i", &w
, &h
);
770 if (ioctl(2, TIOCGWINSZ
, &w
) == 0)
773 sys_height
= w
.ws_row
;
775 sys_width
= w
.ws_col
;
782 if (ioctl(2, WIOCGETD
, &w
) == 0)
785 sys_height
= w
.uw_height
/ w
.uw_vs
;
787 sys_width
= w
.uw_width
/ w
.uw_hs
;
798 sc_height
= sys_height
;
799 else if ((s
= lgetenv("LINES")) != NULL
)
802 else if ((n
= ltgetnum("li")) > 0)
806 sc_height
= DEF_SC_HEIGHT
;
809 sc_width
= sys_width
;
810 else if ((s
= lgetenv("COLUMNS")) != NULL
)
813 else if ((n
= ltgetnum("co")) > 0)
817 sc_width
= DEF_SC_WIDTH
;
820 #if MSDOS_COMPILER==MSOFTC
822 * Figure out how many empty loops it takes to delay a millisecond.
830 * Get synchronized at the start of a tick.
833 while (clock() == start
)
836 * Now count loops till the next tick.
840 while (clock() == start
)
843 * Convert from (loops per clock) to (loops per millisecond).
845 msec_loops
*= CLOCKS_PER_SEC
;
850 * Delay for a specified number of milliseconds.
855 static long delay_dummy
= 0;
867 for (i
= 0; i
< msec_loops
; i
++)
870 * Make it look like we're doing something here,
871 * so the optimizer doesn't remove the whole loop.
880 * Return the characters actually input by a "special" key.
886 static char tbuf
[40];
888 #if MSDOS_COMPILER || OS2
889 static char k_right
[] = { '\340', PCK_RIGHT
, 0 };
890 static char k_left
[] = { '\340', PCK_LEFT
, 0 };
891 static char k_ctl_right
[] = { '\340', PCK_CTL_RIGHT
, 0 };
892 static char k_ctl_left
[] = { '\340', PCK_CTL_LEFT
, 0 };
893 static char k_insert
[] = { '\340', PCK_INSERT
, 0 };
894 static char k_delete
[] = { '\340', PCK_DELETE
, 0 };
895 static char k_ctl_delete
[] = { '\340', PCK_CTL_DELETE
, 0 };
896 static char k_ctl_backspace
[] = { '\177', 0 };
897 static char k_home
[] = { '\340', PCK_HOME
, 0 };
898 static char k_end
[] = { '\340', PCK_END
, 0 };
899 static char k_up
[] = { '\340', PCK_UP
, 0 };
900 static char k_down
[] = { '\340', PCK_DOWN
, 0 };
901 static char k_backtab
[] = { '\340', PCK_SHIFT_TAB
, 0 };
902 static char k_pagedown
[] = { '\340', PCK_PAGEDOWN
, 0 };
903 static char k_pageup
[] = { '\340', PCK_PAGEUP
, 0 };
904 static char k_f1
[] = { '\340', PCK_F1
, 0 };
914 * If windowid is not NULL, assume less is executed in
915 * the XFree86 environment.
918 s
= windowid
? ltgetstr("kr", &sp
) : k_right
;
921 s
= windowid
? ltgetstr("kl", &sp
) : k_left
;
924 s
= windowid
? ltgetstr("ku", &sp
) : k_up
;
927 s
= windowid
? ltgetstr("kd", &sp
) : k_down
;
930 s
= windowid
? ltgetstr("kP", &sp
) : k_pageup
;
933 s
= windowid
? ltgetstr("kN", &sp
) : k_pagedown
;
936 s
= windowid
? ltgetstr("kh", &sp
) : k_home
;
939 s
= windowid
? ltgetstr("@7", &sp
) : k_end
;
944 s
= ltgetstr("kD", &sp
);
984 #if MSDOS_COMPILER || OS2
988 case SK_CTL_LEFT_ARROW
:
991 case SK_CTL_RIGHT_ARROW
:
994 case SK_CTL_BACKSPACE
:
1007 case SK_RIGHT_ARROW
:
1008 s
= ltgetstr("kr", &sp
);
1011 s
= ltgetstr("kl", &sp
);
1014 s
= ltgetstr("ku", &sp
);
1017 s
= ltgetstr("kd", &sp
);
1020 s
= ltgetstr("kP", &sp
);
1023 s
= ltgetstr("kN", &sp
);
1026 s
= ltgetstr("kh", &sp
);
1029 s
= ltgetstr("@7", &sp
);
1032 s
= ltgetstr("kD", &sp
);
1042 tbuf
[0] = CONTROL('K');
1053 * Get terminal capabilities via termcap.
1064 * Set up default colors.
1065 * The xx_s_width and xx_e_width vars are already initialized to 0.
1067 #if MSDOS_COMPILER==MSOFTC
1068 sy_bg_color
= _getbkcolor();
1069 sy_fg_color
= _gettextcolor();
1072 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1076 sy_bg_color
= (w
.attribute
>> 4) & 0x0F;
1077 sy_fg_color
= (w
.attribute
>> 0) & 0x0F;
1080 #if MSDOS_COMPILER==WIN32C
1083 CONSOLE_SCREEN_BUFFER_INFO scr
;
1085 con_out_save
= con_out
= GetStdHandle(STD_OUTPUT_HANDLE
);
1087 * Always open stdin in binary. Note this *must* be done
1088 * before any file operations have been done on fd0.
1091 GetConsoleScreenBufferInfo(con_out
, &scr
);
1092 ReadConsoleOutputAttribute(con_out
, &curr_attr
,
1093 1, scr
.dwCursorPosition
, &nread
);
1094 sy_bg_color
= (curr_attr
& BG_COLORS
) >> 4; /* normalize */
1095 sy_fg_color
= curr_attr
& FG_COLORS
;
1100 nm_fg_color
= sy_fg_color
;
1101 nm_bg_color
= sy_bg_color
;
1112 * Get size of the screen.
1118 #else /* !MSDOS_COMPILER */
1121 register char *t1
, *t2
;
1123 char termbuf
[TERMBUF_SIZE
];
1125 static char sbuf
[TERMSBUF_SIZE
];
1129 * Make sure the termcap database is available.
1131 sp
= lgetenv("TERMCAP");
1132 if (sp
== NULL
|| *sp
== '\0')
1135 if ((sp
= homefile("termcap.dat")) != NULL
)
1137 termcap
= (char *) ecalloc(strlen(sp
)+9, sizeof(char));
1138 sprintf(termcap
, "TERMCAP=%s", sp
);
1145 * Find out what kind of terminal this is.
1147 if ((term
= lgetenv("TERM")) == NULL
)
1148 term
= DEFAULT_TERM
;
1150 if (tgetent(termbuf
, term
) != TGETENT_OK
)
1152 if (ltgetflag("hc"))
1156 * Get size of the screen.
1161 auto_wrap
= ltgetflag("am");
1162 ignaw
= ltgetflag("xn");
1163 above_mem
= ltgetflag("da");
1164 below_mem
= ltgetflag("db");
1165 clear_bg
= ltgetflag("ut");
1168 * Assumes termcap variable "sg" is the printing width of:
1169 * the standout sequence, the end standout sequence,
1170 * the underline sequence, the end underline sequence,
1171 * the boldface sequence, and the end boldface sequence.
1173 if ((so_s_width
= ltgetnum("sg")) < 0)
1175 so_e_width
= so_s_width
;
1177 bo_s_width
= bo_e_width
= so_s_width
;
1178 ul_s_width
= ul_e_width
= so_s_width
;
1179 bl_s_width
= bl_e_width
= so_s_width
;
1182 if (so_s_width
> 0 || so_e_width
> 0)
1184 * Disable highlighting by default on magic cookie terminals.
1185 * Turning on highlighting might change the displayed width
1186 * of a line, causing the display to get messed up.
1187 * The user can turn it back on with -g,
1188 * but she won't like the results.
1194 * Get various string-valued capabilities.
1199 sc_pad
= ltgetstr("pc", &sp
);
1204 sc_s_keypad
= ltgetstr("ks", &sp
);
1205 if (sc_s_keypad
== NULL
)
1207 sc_e_keypad
= ltgetstr("ke", &sp
);
1208 if (sc_e_keypad
== NULL
)
1211 sc_init
= ltgetstr("ti", &sp
);
1212 if (sc_init
== NULL
)
1215 sc_deinit
= ltgetstr("te", &sp
);
1216 if (sc_deinit
== NULL
)
1219 sc_eol_clear
= ltgetstr("ce", &sp
);
1220 if (sc_eol_clear
== NULL
|| *sc_eol_clear
== '\0')
1226 sc_eos_clear
= ltgetstr("cd", &sp
);
1227 if (below_mem
&& (sc_eos_clear
== NULL
|| *sc_eos_clear
== '\0'))
1233 sc_clear
= ltgetstr("cl", &sp
);
1234 if (sc_clear
== NULL
|| *sc_clear
== '\0')
1240 sc_move
= ltgetstr("cm", &sp
);
1241 if (sc_move
== NULL
|| *sc_move
== '\0')
1244 * This is not an error here, because we don't
1245 * always need sc_move.
1246 * We need it only if we don't have home or lower-left.
1253 tmodes("so", "se", &sc_s_in
, &sc_s_out
, "", "", &sp
);
1254 tmodes("us", "ue", &sc_u_in
, &sc_u_out
, sc_s_in
, sc_s_out
, &sp
);
1255 tmodes("md", "me", &sc_b_in
, &sc_b_out
, sc_s_in
, sc_s_out
, &sp
);
1256 tmodes("mb", "me", &sc_bl_in
, &sc_bl_out
, sc_s_in
, sc_s_out
, &sp
);
1258 sc_visual_bell
= ltgetstr("vb", &sp
);
1259 if (sc_visual_bell
== NULL
)
1260 sc_visual_bell
= "";
1262 if (ltgetflag("bs"))
1263 sc_backspace
= "\b";
1266 sc_backspace
= ltgetstr("bc", &sp
);
1267 if (sc_backspace
== NULL
|| *sc_backspace
== '\0')
1268 sc_backspace
= "\b";
1272 * Choose between using "ho" and "cm" ("home" and "cursor move")
1273 * to move the cursor to the upper left corner of the screen.
1275 t1
= ltgetstr("ho", &sp
);
1278 if (*sc_move
== '\0')
1282 strcpy(sp
, tgoto(sc_move
, 0, 0));
1284 sp
+= strlen(sp
) + 1;
1286 sc_home
= cheaper(t1
, t2
, "|\b^");
1289 * Choose between using "ll" and "cm" ("lower left" and "cursor move")
1290 * to move the cursor to the lower left corner of the screen.
1292 t1
= ltgetstr("ll", &sp
);
1295 if (*sc_move
== '\0')
1299 strcpy(sp
, tgoto(sc_move
, 0, sc_height
-1));
1301 sp
+= strlen(sp
) + 1;
1303 sc_lower_left
= cheaper(t1
, t2
, "\r");
1306 * Get carriage return string.
1308 sc_return
= ltgetstr("cr", &sp
);
1309 if (sc_return
== NULL
)
1313 * Choose between using "al" or "sr" ("add line" or "scroll reverse")
1314 * to add a line at the top of the screen.
1316 t1
= ltgetstr("al", &sp
);
1319 t2
= ltgetstr("sr", &sp
);
1323 if (*t1
== '\0' && *t2
== '\0')
1330 sc_addline
= cheaper(t1
, t2
, "");
1331 if (*sc_addline
== '\0')
1334 * Force repaint on any backward movement.
1338 #endif /* MSDOS_COMPILER */
1343 * Return the cost of displaying a termcap string.
1344 * We use the trick of calling tputs, but as a char printing function
1345 * we give it inc_costcount, which just increments "costcount".
1346 * This tells us how many chars would be printed by using this string.
1347 * {{ Couldn't we just use strlen? }}
1349 static int costcount
;
1365 tputs(t
, sc_height
, inc_costcount
);
1370 * Return the "best" of the two given termcap strings.
1371 * The best, if both exist, is the one with the lower
1372 * cost (see cost() function).
1375 cheaper(t1
, t2
, def
)
1379 if (*t1
== '\0' && *t2
== '\0')
1388 if (cost(t1
) < cost(t2
))
1394 tmodes(incap
, outcap
, instr
, outstr
, def_instr
, def_outstr
, spp
)
1403 *instr
= ltgetstr(incap
, spp
);
1408 *outstr
= def_outstr
;
1412 *outstr
= ltgetstr(outcap
, spp
);
1413 if (*outstr
== NULL
)
1414 /* No specific out capability; use "me". */
1415 *outstr
= ltgetstr("me", spp
);
1416 if (*outstr
== NULL
)
1417 /* Don't even have "me"; use a null string. */
1421 #endif /* MSDOS_COMPILER */
1425 * Below are the functions which perform all the
1426 * terminal-specific screen manipulation.
1432 #if MSDOS_COMPILER==WIN32C
1434 _settextposition(int row
, int col
)
1437 CONSOLE_SCREEN_BUFFER_INFO csbi
;
1439 GetConsoleScreenBufferInfo(con_out
, &csbi
);
1440 cpos
.X
= csbi
.srWindow
.Left
+ (col
- 1);
1441 cpos
.Y
= csbi
.srWindow
.Top
+ (row
- 1);
1442 SetConsoleCursorPosition(con_out
, cpos
);
1447 * Initialize the screen to the correct color at startup.
1452 SETCOLORS(nm_fg_color
, nm_bg_color
);
1455 * This clears the screen at startup. This is different from
1456 * the behavior of other versions of less. Disable it for now.
1463 * Create a complete, blank screen using "normal" colors.
1465 SETCOLORS(nm_fg_color
, nm_bg_color
);
1466 blanks
= (char *) ecalloc(width
+1, sizeof(char));
1467 for (col
= 0; col
< sc_width
; col
++)
1469 blanks
[sc_width
] = '\0';
1470 for (row
= 0; row
< sc_height
; row
++)
1477 #if MSDOS_COMPILER==WIN32C
1480 * Termcap-like init with a private win32 console.
1485 CONSOLE_SCREEN_BUFFER_INFO scr
;
1488 if (con_out_save
== INVALID_HANDLE_VALUE
)
1491 GetConsoleScreenBufferInfo(con_out_save
, &scr
);
1493 if (con_out_ours
== INVALID_HANDLE_VALUE
)
1496 * Create our own screen buffer, so that we
1497 * may restore the original when done.
1499 con_out_ours
= CreateConsoleScreenBuffer(
1500 GENERIC_WRITE
| GENERIC_READ
,
1501 FILE_SHARE_WRITE
| FILE_SHARE_READ
,
1502 (LPSECURITY_ATTRIBUTES
) NULL
,
1503 CONSOLE_TEXTMODE_BUFFER
,
1507 size
.X
= scr
.srWindow
.Right
- scr
.srWindow
.Left
+ 1;
1508 size
.Y
= scr
.srWindow
.Bottom
- scr
.srWindow
.Top
+ 1;
1509 SetConsoleScreenBufferSize(con_out_ours
, size
);
1510 SetConsoleActiveScreenBuffer(con_out_ours
);
1511 con_out
= con_out_ours
;
1515 * Restore the startup console.
1520 if (con_out_save
== INVALID_HANDLE_VALUE
)
1523 (void) CloseHandle(con_out_ours
);
1524 SetConsoleActiveScreenBuffer(con_out_save
);
1525 con_out
= con_out_save
;
1531 * Initialize terminal
1538 tputs(sc_init
, sc_height
, putchr
);
1540 tputs(sc_s_keypad
, sc_height
, putchr
);
1546 * This is nice to terminals with no alternate screen,
1547 * but with saved scrolled-off-the-top lines. This way,
1548 * no previous line is lost, but we start with a whole
1549 * screen to ourself.
1551 for (i
= 1; i
< sc_height
; i
++)
1556 #if MSDOS_COMPILER==WIN32C
1567 * Deinitialize terminal
1576 tputs(sc_e_keypad
, sc_height
, putchr
);
1578 tputs(sc_deinit
, sc_height
, putchr
);
1580 /* Restore system colors. */
1581 SETCOLORS(sy_fg_color
, sy_bg_color
);
1582 #if MSDOS_COMPILER==WIN32C
1584 win32_deinit_term();
1586 /* Need clreol to make SETCOLORS take effect. */
1594 * Home cursor (move to upper left corner of screen).
1600 tputs(sc_home
, 1, putchr
);
1603 _settextposition(1,1);
1608 * Add a blank line (called with cursor at home).
1609 * Should scroll the display down.
1615 tputs(sc_addline
, sc_height
, putchr
);
1618 #if MSDOS_COMPILER==MSOFTC
1619 _scrolltextwindow(_GSCROLLDOWN
);
1620 _settextposition(1,1);
1622 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1623 movetext(1,1, sc_width
,sc_height
-1, 1,2);
1627 #if MSDOS_COMPILER==WIN32C
1630 SMALL_RECT rcSrc
, rcClip
;
1632 CONSOLE_SCREEN_BUFFER_INFO csbi
;
1634 GetConsoleScreenBufferInfo(con_out
,&csbi
);
1636 /* The clip rectangle is the entire visible screen. */
1637 rcClip
.Left
= csbi
.srWindow
.Left
;
1638 rcClip
.Top
= csbi
.srWindow
.Top
;
1639 rcClip
.Right
= csbi
.srWindow
.Right
;
1640 rcClip
.Bottom
= csbi
.srWindow
.Bottom
;
1642 /* The source rectangle is the visible screen minus the last line. */
1646 /* Move the top left corner of the source window down one row. */
1647 new_org
.X
= rcSrc
.Left
;
1648 new_org
.Y
= rcSrc
.Top
+ 1;
1650 /* Fill the right character and attributes. */
1651 fillchar
.Char
.AsciiChar
= ' ';
1652 curr_attr
= MAKEATTR(nm_fg_color
, nm_bg_color
);
1653 fillchar
.Attributes
= curr_attr
;
1654 ScrollConsoleScreenBuffer(con_out
, &rcSrc
, &rcClip
, new_org
, &fillchar
);
1655 _settextposition(1,1);
1665 * Remove the n topmost lines and scroll everything below it in the
1666 * window upward. This is needed to stop leaking the topmost line
1667 * into the scrollback buffer when we go down-one-line (in WIN32).
1673 #if MSDOS_COMPILER==WIN32C
1674 SMALL_RECT rcSrc
, rcClip
;
1677 CONSOLE_SCREEN_BUFFER_INFO csbi
; /* to get buffer info */
1679 if (n
>= sc_height
- 1)
1688 GetConsoleScreenBufferInfo(con_out
, &csbi
);
1690 /* Get the extent of all-visible-rows-but-the-last. */
1691 rcSrc
.Left
= csbi
.srWindow
.Left
;
1692 rcSrc
.Top
= csbi
.srWindow
.Top
+ n
;
1693 rcSrc
.Right
= csbi
.srWindow
.Right
;
1694 rcSrc
.Bottom
= csbi
.srWindow
.Bottom
;
1696 /* Get the clip rectangle. */
1697 rcClip
.Left
= rcSrc
.Left
;
1698 rcClip
.Top
= csbi
.srWindow
.Top
;
1699 rcClip
.Right
= rcSrc
.Right
;
1700 rcClip
.Bottom
= rcSrc
.Bottom
;
1702 /* Move the source window up n rows. */
1703 new_org
.X
= rcSrc
.Left
;
1704 new_org
.Y
= rcSrc
.Top
- n
;
1706 /* Fill the right character and attributes. */
1707 fillchar
.Char
.AsciiChar
= ' ';
1708 curr_attr
= MAKEATTR(nm_fg_color
, nm_bg_color
);
1709 fillchar
.Attributes
= curr_attr
;
1711 ScrollConsoleScreenBuffer(con_out
, &rcSrc
, &rcClip
, new_org
, &fillchar
);
1713 /* Position cursor on first blank line. */
1714 goto_line(sc_height
- n
- 1);
1719 #if MSDOS_COMPILER==WIN32C
1727 * This will clear only the currently visible rows of the NT
1728 * console buffer, which means none of the precious scrollback
1729 * rows are touched making for faster scrolling. Note that, if
1730 * the window has fewer columns than the console buffer (i.e.
1731 * there is a horizontal scrollbar as well), the entire width
1732 * of the visible rows will be cleared.
1737 CONSOLE_SCREEN_BUFFER_INFO csbi
;
1739 /* get the number of cells in the current buffer */
1740 GetConsoleScreenBufferInfo(con_out
, &csbi
);
1741 winsz
= csbi
.dwSize
.X
* (csbi
.srWindow
.Bottom
- csbi
.srWindow
.Top
+ 1);
1743 topleft
.Y
= csbi
.srWindow
.Top
;
1745 curr_attr
= MAKEATTR(nm_fg_color
, nm_bg_color
);
1746 FillConsoleOutputCharacter(con_out
, ' ', winsz
, topleft
, &nchars
);
1747 FillConsoleOutputAttribute(con_out
, curr_attr
, winsz
, topleft
, &nchars
);
1751 * Remove the n topmost lines and scroll everything below it in the
1758 SMALL_RECT rcSrc
, rcClip
;
1764 CONSOLE_SCREEN_BUFFER_INFO csbi
;
1769 if (n
>= sc_height
- 1)
1772 _settextposition(1,1);
1776 /* Get the extent of what will remain visible after scrolling. */
1777 GetConsoleScreenBufferInfo(con_out
, &csbi
);
1778 rcSrc
.Left
= csbi
.srWindow
.Left
;
1779 rcSrc
.Top
= csbi
.srWindow
.Top
+ n
;
1780 rcSrc
.Right
= csbi
.srWindow
.Right
;
1781 rcSrc
.Bottom
= csbi
.srWindow
.Bottom
;
1783 /* Get the clip rectangle. */
1784 rcClip
.Left
= rcSrc
.Left
;
1785 rcClip
.Top
= csbi
.srWindow
.Top
;
1786 rcClip
.Right
= rcSrc
.Right
;
1787 rcClip
.Bottom
= rcSrc
.Bottom
;
1789 /* Move the source text to the top of the screen. */
1790 new_org
.X
= rcSrc
.Left
;
1791 /* new_org.Y = rcClip.top; -- doesn't compile under MSVC6 */
1793 /* Fill the right character and attributes. */
1794 fillchar
.Char
.AsciiChar
= ' ';
1795 fillchar
.Attributes
= MAKEATTR(nm_fg_color
, nm_bg_color
);
1797 /* Scroll the window. */
1798 SetConsoleTextAttribute(con_out
, fillchar
.Attributes
);
1799 ScrollConsoleScreenBuffer(con_out
, &rcSrc
, &rcClip
, new_org
, &fillchar
);
1801 /* Clear remaining lines at bottom. */
1802 topleft
.X
= csbi
.dwCursorPosition
.X
;
1803 topleft
.Y
= rcSrc
.Bottom
- n
;
1804 size
= (n
* csbi
.dwSize
.X
) + (rcSrc
.Right
- topleft
.X
);
1805 FillConsoleOutputCharacter(con_out
, ' ', size
, topleft
,
1807 FillConsoleOutputAttribute(con_out
, fillchar
.Attributes
, size
, topleft
,
1809 SetConsoleTextAttribute(con_out
, curr_attr
);
1811 /* Move cursor n lines up from where it was. */
1812 csbi
.dwCursorPosition
.Y
-= n
;
1813 SetConsoleCursorPosition(con_out
, csbi
.dwCursorPosition
);
1818 * Move cursor to lower left corner of screen.
1824 tputs(sc_lower_left
, 1, putchr
);
1827 _settextposition(sc_height
, 1);
1832 * Move cursor to left position of current line.
1838 tputs(sc_return
, 1, putchr
);
1842 #if MSDOS_COMPILER==WIN32C
1844 CONSOLE_SCREEN_BUFFER_INFO scr
;
1845 GetConsoleScreenBufferInfo(con_out
, &scr
);
1846 row
= scr
.dwCursorPosition
.Y
- scr
.srWindow
.Top
+ 1;
1849 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
1853 struct rccoord tpos
= _gettextposition();
1858 _settextposition(row
, 1);
1863 * Check if the console size has changed and reset internals
1864 * (in lieu of SIGWINCH for WIN32).
1869 #if MSDOS_COMPILER==WIN32C
1870 CONSOLE_SCREEN_BUFFER_INFO scr
;
1873 if (con_out
== INVALID_HANDLE_VALUE
)
1877 GetConsoleScreenBufferInfo(con_out
, &scr
);
1878 size
.Y
= scr
.srWindow
.Bottom
- scr
.srWindow
.Top
+ 1;
1879 size
.X
= scr
.srWindow
.Right
- scr
.srWindow
.Left
+ 1;
1880 if (size
.Y
!= sc_height
|| size
.X
!= sc_width
)
1884 if (!no_init
&& con_out_ours
== con_out
)
1885 SetConsoleScreenBufferSize(con_out
, size
);
1887 wscroll
= (sc_height
+ 1) / 2;
1894 * Goto a specific line on the screen.
1901 tputs(tgoto(sc_move
, 0, slinenum
), 1, putchr
);
1904 _settextposition(slinenum
+1, 1);
1908 #if MSDOS_COMPILER==MSOFTC || MSDOS_COMPILER==BORLANDC
1910 * Create an alternate screen which is all white.
1911 * This screen is used to create a "flash" effect, by displaying it
1912 * briefly and then switching back to the normal screen.
1913 * {{ Yuck! There must be a better way to get a visual bell. }}
1918 #if MSDOS_COMPILER==MSOFTC
1919 struct videoconfig w
;
1923 _getvideoconfig(&w
);
1924 videopages
= w
.numvideopages
;
1927 at_enter(AT_STANDOUT
);
1932 at_enter(AT_STANDOUT
);
1933 blanks
= (char *) ecalloc(w
.numtextcols
, sizeof(char));
1934 for (col
= 0; col
< w
.numtextcols
; col
++)
1936 for (row
= w
.numtextrows
; row
> 0; row
--)
1937 _outmem(blanks
, w
.numtextcols
);
1944 #if MSDOS_COMPILER==BORLANDC
1947 whitescreen
= (unsigned short *)
1948 malloc(sc_width
* sc_height
* sizeof(short));
1949 if (whitescreen
== NULL
)
1951 for (n
= 0; n
< sc_width
* sc_height
; n
++)
1952 whitescreen
[n
] = 0x7020;
1954 #if MSDOS_COMPILER==WIN32C
1957 whitescreen
= (WORD
*)
1958 malloc(sc_height
* sc_width
* sizeof(WORD
));
1959 if (whitescreen
== NULL
)
1961 /* Invert the standard colors. */
1962 for (n
= 0; n
< sc_width
* sc_height
; n
++)
1963 whitescreen
[n
] = (WORD
)((nm_fg_color
<< 4) | nm_bg_color
);
1969 #endif /* MSDOS_COMPILER */
1972 * Output the "visual bell", if there is one.
1978 if (*sc_visual_bell
== '\0')
1980 tputs(sc_visual_bell
, sc_height
, putchr
);
1982 #if MSDOS_COMPILER==DJGPPC
1985 #if MSDOS_COMPILER==MSOFTC
1987 * Create a flash screen on the second video page.
1988 * Switch to that page, then switch back.
1998 #if MSDOS_COMPILER==BORLANDC
1999 unsigned short *currscreen
;
2002 * Get a copy of the current screen.
2003 * Display the flash screen.
2004 * Then restore the old screen.
2008 if (whitescreen
== NULL
)
2010 currscreen
= (unsigned short *)
2011 malloc(sc_width
* sc_height
* sizeof(short));
2012 if (currscreen
== NULL
) return;
2013 gettext(1, 1, sc_width
, sc_height
, currscreen
);
2014 puttext(1, 1, sc_width
, sc_height
, whitescreen
);
2016 puttext(1, 1, sc_width
, sc_height
, currscreen
);
2019 #if MSDOS_COMPILER==WIN32C
2020 /* paint screen with an inverse color */
2023 /* leave it displayed for 100 msec. */
2026 /* restore with a redraw */
2042 putchr(CONTROL('G'));
2044 #if MSDOS_COMPILER==WIN32C
2053 * Ring the terminal bell.
2058 if (quiet
== VERY_QUIET
)
2071 tputs(sc_clear
, sc_height
, putchr
);
2074 #if MSDOS_COMPILER==WIN32C
2077 _clearscreen(_GCLEARSCREEN
);
2083 * Clear from the cursor to the end of the cursor's line.
2084 * {{ This must not move the cursor. }}
2090 tputs(sc_eol_clear
, 1, putchr
);
2092 #if MSDOS_COMPILER==MSOFTC
2095 struct rccoord tpos
;
2099 * Save current state.
2101 tpos
= _gettextposition();
2102 _gettextwindow(&top
, &left
, &bot
, &right
);
2104 * Set a temporary window to the current line,
2105 * from the cursor's position to the right edge of the screen.
2106 * Then clear that window.
2108 _settextwindow(tpos
.row
, tpos
.col
, tpos
.row
, sc_width
);
2109 _clearscreen(_GWINDOW
);
2113 _settextwindow(top
, left
, bot
, right
);
2114 _settextposition(tpos
.row
, tpos
.col
);
2116 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
2120 #if MSDOS_COMPILER==WIN32C
2123 CONSOLE_SCREEN_BUFFER_INFO scr
;
2126 memset(&scr
, 0, sizeof(scr
));
2127 GetConsoleScreenBufferInfo(con_out
, &scr
);
2128 cpos
.X
= scr
.dwCursorPosition
.X
;
2129 cpos
.Y
= scr
.dwCursorPosition
.Y
;
2130 curr_attr
= MAKEATTR(nm_fg_color
, nm_bg_color
);
2131 FillConsoleOutputAttribute(con_out
, curr_attr
,
2132 scr
.dwSize
.X
- cpos
.X
, cpos
, &nchars
);
2133 FillConsoleOutputCharacter(con_out
, ' ',
2134 scr
.dwSize
.X
- cpos
.X
, cpos
, &nchars
);
2142 * Clear the current line.
2143 * Clear the screen if there's off-screen memory below the display.
2152 tputs(sc_eos_clear
, 1, putchr
);
2154 tputs(sc_eol_clear
, 1, putchr
);
2159 * Clear the bottom line of the display.
2160 * Leave the cursor at the beginning of the bottom line.
2166 * If we're in a non-normal attribute mode, temporarily exit
2167 * the mode while we do the clear. Some terminals fill the
2168 * cleared area with the current attribute.
2175 if (attrmode
== AT_NORMAL
)
2179 int saved_attrmode
= attrmode
;
2183 at_enter(saved_attrmode
);
2191 attr
= apply_at_specials(attr
);
2194 /* The one with the most priority is last. */
2195 if (attr
& AT_UNDERLINE
)
2196 tputs(sc_u_in
, 1, putchr
);
2198 tputs(sc_b_in
, 1, putchr
);
2199 if (attr
& AT_BLINK
)
2200 tputs(sc_bl_in
, 1, putchr
);
2201 if (attr
& AT_STANDOUT
)
2202 tputs(sc_s_in
, 1, putchr
);
2205 /* The one with the most priority is first. */
2206 if (attr
& AT_STANDOUT
)
2208 SETCOLORS(so_fg_color
, so_bg_color
);
2209 } else if (attr
& AT_BLINK
)
2211 SETCOLORS(bl_fg_color
, bl_bg_color
);
2213 else if (attr
& AT_BOLD
)
2215 SETCOLORS(bo_fg_color
, bo_bg_color
);
2217 else if (attr
& AT_UNDERLINE
)
2219 SETCOLORS(ul_fg_color
, ul_bg_color
);
2230 /* Undo things in the reverse order we did them. */
2231 if (attrmode
& AT_STANDOUT
)
2232 tputs(sc_s_out
, 1, putchr
);
2233 if (attrmode
& AT_BLINK
)
2234 tputs(sc_bl_out
, 1, putchr
);
2235 if (attrmode
& AT_BOLD
)
2236 tputs(sc_b_out
, 1, putchr
);
2237 if (attrmode
& AT_UNDERLINE
)
2238 tputs(sc_u_out
, 1, putchr
);
2241 SETCOLORS(nm_fg_color
, nm_bg_color
);
2244 attrmode
= AT_NORMAL
;
2251 int new_attrmode
= apply_at_specials(attr
);
2252 int ignore_modes
= AT_ANSI
;
2254 if ((new_attrmode
& ~ignore_modes
) != (attrmode
& ~ignore_modes
))
2262 is_at_equiv(attr1
, attr2
)
2266 attr1
= apply_at_specials(attr1
);
2267 attr2
= apply_at_specials(attr2
);
2269 return (attr1
== attr2
);
2273 apply_at_specials(attr
)
2276 if (attr
& AT_BINARY
)
2278 if (attr
& AT_HILITE
)
2279 attr
|= AT_STANDOUT
;
2280 attr
&= ~(AT_BINARY
|AT_HILITE
);
2285 #if 0 /* No longer used */
2287 * Erase the character to the left of the cursor
2288 * and move the cursor left.
2295 * Erase the previous character by overstriking with a space.
2297 tputs(sc_backspace
, 1, putchr
);
2299 tputs(sc_backspace
, 1, putchr
);
2301 #if MSDOS_COMPILER==MSOFTC
2302 struct rccoord tpos
;
2305 tpos
= _gettextposition();
2308 _settextposition(tpos
.row
, tpos
.col
-1);
2310 _settextposition(tpos
.row
, tpos
.col
-1);
2312 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
2315 #if MSDOS_COMPILER==WIN32C
2318 CONSOLE_SCREEN_BUFFER_INFO scr
;
2321 GetConsoleScreenBufferInfo(con_out
, &scr
);
2322 cpos
= scr
.dwCursorPosition
;
2326 SetConsoleCursorPosition(con_out
, cpos
);
2327 FillConsoleOutputCharacter(con_out
, (TCHAR
)' ', 1, cpos
, &cChars
);
2328 SetConsoleCursorPosition(con_out
, cpos
);
2337 * Output a plain backspace, without erasing the previous char.
2343 tputs(sc_backspace
, 1, putchr
);
2349 #if MSDOS_COMPILER==MSOFTC
2350 struct rccoord tpos
;
2351 tpos
= _gettextposition();
2355 #if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
2359 #if MSDOS_COMPILER==WIN32C
2360 CONSOLE_SCREEN_BUFFER_INFO scr
;
2361 GetConsoleScreenBufferInfo(con_out
, &scr
);
2362 row
= scr
.dwCursorPosition
.Y
- scr
.srWindow
.Top
+ 1;
2363 col
= scr
.dwCursorPosition
.X
- scr
.srWindow
.Left
+ 1;
2370 _settextposition(row
, col
-1);
2371 #endif /* MSDOS_COMPILER */
2374 #if MSDOS_COMPILER==WIN32C
2376 * Determine whether an input character is waiting to be read.
2388 currentKey
.ascii
= 0;
2389 currentKey
.scan
= 0;
2392 * Wait for a real key-down event, but
2393 * ignore SHIFT and CONTROL key events.
2397 PeekConsoleInput(tty
, &ip
, 1, &read
);
2400 ReadConsoleInput(tty
, &ip
, 1, &read
);
2401 } while (ip
.EventType
!= KEY_EVENT
||
2402 ip
.Event
.KeyEvent
.bKeyDown
!= TRUE
||
2403 ip
.Event
.KeyEvent
.wVirtualScanCode
== 0 ||
2404 ip
.Event
.KeyEvent
.wVirtualKeyCode
== VK_SHIFT
||
2405 ip
.Event
.KeyEvent
.wVirtualKeyCode
== VK_CONTROL
||
2406 ip
.Event
.KeyEvent
.wVirtualKeyCode
== VK_MENU
);
2408 currentKey
.ascii
= ip
.Event
.KeyEvent
.uChar
.AsciiChar
;
2409 currentKey
.scan
= ip
.Event
.KeyEvent
.wVirtualScanCode
;
2410 keyCount
= ip
.Event
.KeyEvent
.wRepeatCount
;
2412 if (ip
.Event
.KeyEvent
.dwControlKeyState
&
2413 (LEFT_ALT_PRESSED
| RIGHT_ALT_PRESSED
))
2415 switch (currentKey
.scan
)
2417 case PCK_ALT_E
: /* letter 'E' */
2418 currentKey
.ascii
= 0;
2421 } else if (ip
.Event
.KeyEvent
.dwControlKeyState
&
2422 (LEFT_CTRL_PRESSED
| RIGHT_CTRL_PRESSED
))
2424 switch (currentKey
.scan
)
2426 case PCK_RIGHT
: /* right arrow */
2427 currentKey
.scan
= PCK_CTL_RIGHT
;
2429 case PCK_LEFT
: /* left arrow */
2430 currentKey
.scan
= PCK_CTL_LEFT
;
2432 case PCK_DELETE
: /* delete */
2433 currentKey
.scan
= PCK_CTL_DELETE
;
2441 * Read a character from the keyboard.
2449 if (pending_scancode
)
2451 pending_scancode
= 0;
2452 return ((char)(currentKey
.scan
& 0x00FF));
2455 while (win32_kbhit((HANDLE
)tty
) == FALSE
)
2463 ascii
= currentKey
.ascii
;
2465 * On PC's, the extended keys return a 2 byte sequence beginning
2466 * with '00', so if the ascii code is 00, the next byte will be
2467 * the lsb of the scan code.
2469 pending_scancode
= (ascii
== 0x00);
2470 return ((char)ascii
);
2478 WIN32setcolors(fg
, bg
)
2488 WIN32textout(text
, len
)
2492 #if MSDOS_COMPILER==WIN32C
2494 WriteConsole(con_out
, text
, len
, &written
, NULL
);