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freebsd/contrib/less/screen.c
Paul Saab 8fd4165cc4 Merge vendor changes onto mainline.
2002-01-07 20:37:09 +00:00

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/* $FreeBSD$ */
/*
* Copyright (C) 1984-2000 Mark Nudelman
*
* You may distribute under the terms of either the GNU General Public
* License or the Less License, as specified in the README file.
*
* For more information about less, or for information on how to
* contact the author, see the README file.
*/
/*
* Routines which deal with the characteristics of the terminal.
* Uses termcap to be as terminal-independent as possible.
*/
#include "less.h"
#include "cmd.h"
#if MSDOS_COMPILER
#include "pckeys.h"
#if MSDOS_COMPILER==MSOFTC
#include <graph.h>
#else
#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
#include <conio.h>
#if MSDOS_COMPILER==DJGPPC
#include <pc.h>
extern int fd0;
#endif
#else
#if MSDOS_COMPILER==WIN32C
#include <windows.h>
#endif
#endif
#endif
#include <time.h>
#else
#if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS
#include <termios.h>
#if HAVE_SYS_IOCTL_H && !defined(TIOCGWINSZ)
#include <sys/ioctl.h>
#endif
#else
#if HAVE_TERMIO_H
#include <termio.h>
#else
#if HAVE_SGSTAT_H
#include <sgstat.h>
#else
#include <sgtty.h>
#endif
#if HAVE_SYS_IOCTL_H && (defined(TIOCGWINSZ) || defined(TCGETA) || defined(TIOCGETP) || defined(WIOCGETD))
#include <sys/ioctl.h>
#endif
#endif
#endif
#if HAVE_TERMCAP_H
#include <termcap.h>
#endif
#ifdef _OSK
#include <signal.h>
#endif
#if OS2
#include <sys/signal.h>
#include "pckeys.h"
#endif
#if HAVE_SYS_STREAM_H
#include <sys/stream.h>
#endif
#if HAVE_SYS_PTEM_H
#include <sys/ptem.h>
#endif
#endif /* MSDOS_COMPILER */
/*
* Check for broken termios package that forces you to manually
* set the line discipline.
*/
#ifdef __ultrix__
#define MUST_SET_LINE_DISCIPLINE 1
#else
#define MUST_SET_LINE_DISCIPLINE 0
#endif
#if OS2
#define DEFAULT_TERM "ansi"
static char *windowid;
#else
#define DEFAULT_TERM "unknown"
#endif
#if MSDOS_COMPILER==MSOFTC
static int videopages;
static long msec_loops;
static int flash_created = 0;
#define SETCOLORS(fg,bg) { _settextcolor(fg); _setbkcolor(bg); }
#endif
#if MSDOS_COMPILER==BORLANDC
static unsigned short *whitescreen;
static int flash_created = 0;
#endif
#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
#define _settextposition(y,x) gotoxy(x,y)
#define _clearscreen(m) clrscr()
#define _outtext(s) cputs(s)
#define SETCOLORS(fg,bg) { textcolor(fg); textbackground(bg); }
extern int sc_height;
#endif
#if MSDOS_COMPILER==WIN32C
struct keyRecord
{
int ascii;
int scan;
} currentKey;
static int keyCount = 0;
static WORD curr_attr;
static int pending_scancode = 0;
static WORD *whitescreen;
static HANDLE con_out_save = INVALID_HANDLE_VALUE; /* previous console */
static HANDLE con_out_ours = INVALID_HANDLE_VALUE; /* our own */
HANDLE con_out = INVALID_HANDLE_VALUE; /* current console */
extern int quitting;
static void win32_init_term();
static void win32_deinit_term();
#define FG_COLORS (FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_INTENSITY)
#define BG_COLORS (BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE | BACKGROUND_INTENSITY)
#define MAKEATTR(fg,bg) ((WORD)((fg)|((bg)<<4)))
#define SETCOLORS(fg,bg) { curr_attr = MAKEATTR(fg,bg); \
if (SetConsoleTextAttribute(con_out, curr_attr) == 0) \
error("SETCOLORS failed"); }
#endif
#if MSDOS_COMPILER
public int nm_fg_color; /* Color of normal text */
public int nm_bg_color;
public int bo_fg_color; /* Color of bold text */
public int bo_bg_color;
public int ul_fg_color; /* Color of underlined text */
public int ul_bg_color;
public int so_fg_color; /* Color of standout text */
public int so_bg_color;
public int bl_fg_color; /* Color of blinking text */
public int bl_bg_color;
static int sy_fg_color; /* Color of system text (before less) */
static int sy_bg_color;
#else
/*
* Strings passed to tputs() to do various terminal functions.
*/
static char
*sc_pad, /* Pad string */
*sc_home, /* Cursor home */
*sc_addline, /* Add line, scroll down following lines */
*sc_lower_left, /* Cursor to last line, first column */
*sc_move, /* General cursor positioning */
*sc_clear, /* Clear screen */
*sc_eol_clear, /* Clear to end of line */
*sc_eos_clear, /* Clear to end of screen */
*sc_s_in, /* Enter standout (highlighted) mode */
*sc_s_out, /* Exit standout mode */
*sc_u_in, /* Enter underline mode */
*sc_u_out, /* Exit underline mode */
*sc_b_in, /* Enter bold mode */
*sc_b_out, /* Exit bold mode */
*sc_bl_in, /* Enter blink mode */
*sc_bl_out, /* Exit blink mode */
*sc_visual_bell, /* Visual bell (flash screen) sequence */
*sc_backspace, /* Backspace cursor */
*sc_s_keypad, /* Start keypad mode */
*sc_e_keypad, /* End keypad mode */
*sc_init, /* Startup terminal initialization */
*sc_deinit; /* Exit terminal de-initialization */
#endif
static int init_done = 0;
public int auto_wrap; /* Terminal does \r\n when write past margin */
public int ignaw; /* Terminal ignores \n immediately after wrap */
public int erase_char, kill_char; /* The user's erase and line-kill chars */
public int werase_char; /* The user's word-erase char */
public int sc_width, sc_height; /* Height & width of screen */
public int bo_s_width, bo_e_width; /* Printing width of boldface seq */
public int ul_s_width, ul_e_width; /* Printing width of underline seq */
public int so_s_width, so_e_width; /* Printing width of standout seq */
public int bl_s_width, bl_e_width; /* Printing width of blink seq */
public int above_mem, below_mem; /* Memory retained above/below screen */
public int can_goto_line; /* Can move cursor to any line */
public int clear_bg; /* Clear fills with background color */
public int missing_cap = 0; /* Some capability is missing */
static int attrmode = AT_NORMAL;
#if !MSDOS_COMPILER
static char *cheaper();
static void tmodes();
#endif
/*
* These two variables are sometimes defined in,
* and needed by, the termcap library.
*/
#if MUST_DEFINE_OSPEED
extern short ospeed; /* Terminal output baud rate */
extern char PC; /* Pad character */
#endif
#ifdef _OSK
short ospeed;
char PC_, *UP, *BC;
#endif
extern int quiet; /* If VERY_QUIET, use visual bell for bell */
extern int no_back_scroll;
extern int swindow;
extern int no_init;
extern int quit_at_eof;
extern int more_mode;
extern int no_keypad;
extern int sigs;
extern int wscroll;
extern int screen_trashed;
#if HILITE_SEARCH
extern int hilite_search;
#endif
extern char *tgetstr();
extern char *tgoto();
/*
* Change terminal to "raw mode", or restore to "normal" mode.
* "Raw mode" means
* 1. An outstanding read will complete on receipt of a single keystroke.
* 2. Input is not echoed.
* 3. On output, \n is mapped to \r\n.
* 4. \t is NOT expanded into spaces.
* 5. Signal-causing characters such as ctrl-C (interrupt),
* etc. are NOT disabled.
* It doesn't matter whether an input \n is mapped to \r, or vice versa.
*/
public void
raw_mode(on)
int on;
{
static int curr_on = 0;
if (on == curr_on)
return;
#if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS
{
struct termios s;
static struct termios save_term;
static int saved_term = 0;
if (on)
{
/*
* Get terminal modes.
*/
tcgetattr(2, &s);
/*
* Save modes and set certain variables dependent on modes.
*/
if (!saved_term)
{
save_term = s;
saved_term = 1;
}
#if HAVE_OSPEED
switch (cfgetospeed(&s))
{
#ifdef B0
case B0: ospeed = 0; break;
#endif
#ifdef B50
case B50: ospeed = 1; break;
#endif
#ifdef B75
case B75: ospeed = 2; break;
#endif
#ifdef B110
case B110: ospeed = 3; break;
#endif
#ifdef B134
case B134: ospeed = 4; break;
#endif
#ifdef B150
case B150: ospeed = 5; break;
#endif
#ifdef B200
case B200: ospeed = 6; break;
#endif
#ifdef B300
case B300: ospeed = 7; break;
#endif
#ifdef B600
case B600: ospeed = 8; break;
#endif
#ifdef B1200
case B1200: ospeed = 9; break;
#endif
#ifdef B1800
case B1800: ospeed = 10; break;
#endif
#ifdef B2400
case B2400: ospeed = 11; break;
#endif
#ifdef B4800
case B4800: ospeed = 12; break;
#endif
#ifdef B9600
case B9600: ospeed = 13; break;
#endif
#ifdef EXTA
case EXTA: ospeed = 14; break;
#endif
#ifdef EXTB
case EXTB: ospeed = 15; break;
#endif
#ifdef B57600
case B57600: ospeed = 16; break;
#endif
#ifdef B115200
case B115200: ospeed = 17; break;
#endif
default: ;
}
#endif
erase_char = s.c_cc[VERASE];
kill_char = s.c_cc[VKILL];
#ifdef VWERASE
werase_char = s.c_cc[VWERASE];
#else
werase_char = CONTROL('W');
#endif
/*
* Set the modes to the way we want them.
*/
s.c_lflag &= ~(0
#ifdef ICANON
| ICANON
#endif
#ifdef ECHO
| ECHO
#endif
#ifdef ECHOE
| ECHOE
#endif
#ifdef ECHOK
| ECHOK
#endif
#if ECHONL
| ECHONL
#endif
);
s.c_oflag |= (0
#ifdef OXTABS
| OXTABS
#else
#ifdef TAB3
| TAB3
#else
#ifdef XTABS
| XTABS
#endif
#endif
#endif
#ifdef OPOST
| OPOST
#endif
#ifdef ONLCR
| ONLCR
#endif
);
s.c_oflag &= ~(0
#ifdef ONOEOT
| ONOEOT
#endif
#ifdef OCRNL
| OCRNL
#endif
#ifdef ONOCR
| ONOCR
#endif
#ifdef ONLRET
| ONLRET
#endif
);
s.c_cc[VMIN] = 1;
s.c_cc[VTIME] = 0;
#ifdef VLNEXT
s.c_cc[VLNEXT] = 0;
#endif
#ifdef VDSUSP
s.c_cc[VDSUSP] = 0;
#endif
#if MUST_SET_LINE_DISCIPLINE
/*
* System's termios is broken; need to explicitly
* request TERMIODISC line discipline.
*/
s.c_line = TERMIODISC;
#endif
} else
{
/*
* Restore saved modes.
*/
s = save_term;
}
#if HAVE_FSYNC
fsync(2);
#endif
tcsetattr(2, TCSADRAIN, &s);
#if MUST_SET_LINE_DISCIPLINE
if (!on)
{
/*
* Broken termios *ignores* any line discipline
* except TERMIODISC. A different old line discipline
* is therefore not restored, yet. Restore the old
* line discipline by hand.
*/
ioctl(2, TIOCSETD, &save_term.c_line);
}
#endif
}
#else
#ifdef TCGETA
{
struct termio s;
static struct termio save_term;
static int saved_term = 0;
if (on)
{
/*
* Get terminal modes.
*/
ioctl(2, TCGETA, &s);
/*
* Save modes and set certain variables dependent on modes.
*/
if (!saved_term)
{
save_term = s;
saved_term = 1;
}
#if HAVE_OSPEED
ospeed = s.c_cflag & CBAUD;
#endif
erase_char = s.c_cc[VERASE];
kill_char = s.c_cc[VKILL];
#ifdef VWERASE
werase_char = s.c_cc[VWERASE];
#else
werase_char = CONTROL('W');
#endif
/*
* Set the modes to the way we want them.
*/
s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL);
s.c_oflag |= (OPOST|ONLCR|TAB3);
s.c_oflag &= ~(OCRNL|ONOCR|ONLRET);
s.c_cc[VMIN] = 1;
s.c_cc[VTIME] = 0;
} else
{
/*
* Restore saved modes.
*/
s = save_term;
}
ioctl(2, TCSETAW, &s);
}
#else
#ifdef TIOCGETP
{
struct sgttyb s;
static struct sgttyb save_term;
static int saved_term = 0;
if (on)
{
/*
* Get terminal modes.
*/
ioctl(2, TIOCGETP, &s);
/*
* Save modes and set certain variables dependent on modes.
*/
if (!saved_term)
{
save_term = s;
saved_term = 1;
}
#if HAVE_OSPEED
ospeed = s.sg_ospeed;
#endif
erase_char = s.sg_erase;
kill_char = s.sg_kill;
werase_char = CONTROL('W');
/*
* Set the modes to the way we want them.
*/
s.sg_flags |= CBREAK;
s.sg_flags &= ~(ECHO|XTABS);
} else
{
/*
* Restore saved modes.
*/
s = save_term;
}
ioctl(2, TIOCSETN, &s);
}
#else
#ifdef _OSK
{
struct sgbuf s;
static struct sgbuf save_term;
static int saved_term = 0;
if (on)
{
/*
* Get terminal modes.
*/
_gs_opt(2, &s);
/*
* Save modes and set certain variables dependent on modes.
*/
if (!saved_term)
{
save_term = s;
saved_term = 1;
}
erase_char = s.sg_bspch;
kill_char = s.sg_dlnch;
werase_char = CONTROL('W');
/*
* Set the modes to the way we want them.
*/
s.sg_echo = 0;
s.sg_eofch = 0;
s.sg_pause = 0;
s.sg_psch = 0;
} else
{
/*
* Restore saved modes.
*/
s = save_term;
}
_ss_opt(2, &s);
}
#else
/* MS-DOS, Windows, or OS2 */
#if OS2
/* OS2 */
LSIGNAL(SIGINT, SIG_IGN);
#endif
erase_char = '\b';
#if MSDOS_COMPILER==DJGPPC
kill_char = CONTROL('U');
/*
* So that when we shell out or run another program, its
* stdin is in cooked mode. We do not switch stdin to binary
* mode if fd0 is zero, since that means we were called before
* tty was reopened in open_getchr, in which case we would be
* changing the original stdin device outside less.
*/
if (fd0 != 0)
setmode(0, on ? O_BINARY : O_TEXT);
#else
kill_char = ESC;
#endif
werase_char = CONTROL('W');
#endif
#endif
#endif
#endif
curr_on = on;
}
#if !MSDOS_COMPILER
/*
* Some glue to prevent calling termcap functions if tgetent() failed.
*/
static int hardcopy;
static char *
ltget_env(capname)
char *capname;
{
char name[16];
strcpy(name, "LESS_TERMCAP_");
strcat(name, capname);
return (lgetenv(name));
}
static int
ltgetflag(capname)
char *capname;
{
char *s;
if ((s = ltget_env(capname)) != NULL)
return (*s != '\0' && *s != '0');
if (hardcopy)
return (0);
return (tgetflag(capname));
}
static int
ltgetnum(capname)
char *capname;
{
char *s;
if ((s = ltget_env(capname)) != NULL)
return (atoi(s));
if (hardcopy)
return (-1);
return (tgetnum(capname));
}
static char *
ltgetstr(capname, pp)
char *capname;
char **pp;
{
char *s;
if ((s = ltget_env(capname)) != NULL)
return (s);
if (hardcopy)
return (NULL);
return (tgetstr(capname, pp));
}
#endif /* MSDOS_COMPILER */
/*
* Get size of the output screen.
*/
public void
scrsize()
{
register char *s;
int sys_height;
int sys_width;
#if !MSDOS_COMPILER
int n;
#endif
#define DEF_SC_WIDTH 80
#if MSDOS_COMPILER
#define DEF_SC_HEIGHT 25
#else
#define DEF_SC_HEIGHT 24
#endif
sys_width = sys_height = 0;
#if MSDOS_COMPILER==MSOFTC
{
struct videoconfig w;
_getvideoconfig(&w);
sys_height = w.numtextrows;
sys_width = w.numtextcols;
}
#else
#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
{
struct text_info w;
gettextinfo(&w);
sys_height = w.screenheight;
sys_width = w.screenwidth;
}
#else
#if MSDOS_COMPILER==WIN32C
{
CONSOLE_SCREEN_BUFFER_INFO scr;
GetConsoleScreenBufferInfo(con_out, &scr);
sys_height = scr.srWindow.Bottom - scr.srWindow.Top + 1;
sys_width = scr.srWindow.Right - scr.srWindow.Left + 1;
}
#else
#if OS2
{
int s[2];
_scrsize(s);
sys_width = s[0];
sys_height = s[1];
/*
* When using terminal emulators for XFree86/OS2, the
* _scrsize function does not work well.
* Call the scrsize.exe program to get the window size.
*/
windowid = getenv("WINDOWID");
if (windowid != NULL)
{
FILE *fd = popen("scrsize", "rt");
if (fd != NULL)
{
int w, h;
fscanf(fd, "%i %i", &w, &h);
if (w > 0 && h > 0)
{
sys_width = w;
sys_height = h;
}
pclose(fd);
}
}
}
#else
#ifdef TIOCGWINSZ
{
struct winsize w;
if (ioctl(2, TIOCGWINSZ, &w) == 0)
{
if (w.ws_row > 0)
sys_height = w.ws_row;
if (w.ws_col > 0)
sys_width = w.ws_col;
}
}
#else
#ifdef WIOCGETD
{
struct uwdata w;
if (ioctl(2, WIOCGETD, &w) == 0)
{
if (w.uw_height > 0)
sys_height = w.uw_height / w.uw_vs;
if (w.uw_width > 0)
sys_width = w.uw_width / w.uw_hs;
}
}
#endif
#endif
#endif
#endif
#endif
#endif
if (sys_height > 0)
sc_height = sys_height;
else if ((s = lgetenv("LINES")) != NULL)
sc_height = atoi(s);
#if !MSDOS_COMPILER
else if ((n = ltgetnum("li")) > 0)
sc_height = n;
#endif
else
sc_height = DEF_SC_HEIGHT;
if (sys_width > 0)
sc_width = sys_width;
else if ((s = lgetenv("COLUMNS")) != NULL)
sc_width = atoi(s);
#if !MSDOS_COMPILER
else if ((n = ltgetnum("co")) > 0)
sc_width = n;
#endif
else
sc_width = DEF_SC_WIDTH;
}
#if MSDOS_COMPILER==MSOFTC
/*
* Figure out how many empty loops it takes to delay a millisecond.
*/
static void
get_clock()
{
clock_t start;
/*
* Get synchronized at the start of a tick.
*/
start = clock();
while (clock() == start)
;
/*
* Now count loops till the next tick.
*/
start = clock();
msec_loops = 0;
while (clock() == start)
msec_loops++;
/*
* Convert from (loops per clock) to (loops per millisecond).
*/
msec_loops *= CLOCKS_PER_SEC;
msec_loops /= 1000;
}
/*
* Delay for a specified number of milliseconds.
*/
static void
dummy_func()
{
static long delay_dummy = 0;
delay_dummy++;
}
static void
delay(msec)
int msec;
{
long i;
while (msec-- > 0)
{
for (i = 0; i < msec_loops; i++)
{
/*
* Make it look like we're doing something here,
* so the optimizer doesn't remove the whole loop.
*/
dummy_func();
}
}
}
#endif
/*
* Return the characters actually input by a "special" key.
*/
public char *
special_key_str(key)
int key;
{
static char tbuf[40];
char *s;
#if MSDOS_COMPILER || OS2
static char k_right[] = { '\340', PCK_RIGHT, 0 };
static char k_left[] = { '\340', PCK_LEFT, 0 };
static char k_ctl_right[] = { '\340', PCK_CTL_RIGHT, 0 };
static char k_ctl_left[] = { '\340', PCK_CTL_LEFT, 0 };
static char k_insert[] = { '\340', PCK_INSERT, 0 };
static char k_delete[] = { '\340', PCK_DELETE, 0 };
static char k_ctl_delete[] = { '\340', PCK_CTL_DELETE, 0 };
static char k_ctl_backspace[] = { '\177', 0 };
static char k_home[] = { '\340', PCK_HOME, 0 };
static char k_end[] = { '\340', PCK_END, 0 };
static char k_up[] = { '\340', PCK_UP, 0 };
static char k_down[] = { '\340', PCK_DOWN, 0 };
static char k_backtab[] = { '\340', PCK_SHIFT_TAB, 0 };
static char k_pagedown[] = { '\340', PCK_PAGEDOWN, 0 };
static char k_pageup[] = { '\340', PCK_PAGEUP, 0 };
static char k_f1[] = { '\340', PCK_F1, 0 };
#endif
#if !MSDOS_COMPILER
char *sp = tbuf;
#endif
switch (key)
{
#if OS2
/*
* If windowid is not NULL, assume less is executed in
* the XFree86 environment.
*/
case SK_RIGHT_ARROW:
s = windowid ? ltgetstr("kr", &sp) : k_right;
break;
case SK_LEFT_ARROW:
s = windowid ? ltgetstr("kl", &sp) : k_left;
break;
case SK_UP_ARROW:
s = windowid ? ltgetstr("ku", &sp) : k_up;
break;
case SK_DOWN_ARROW:
s = windowid ? ltgetstr("kd", &sp) : k_down;
break;
case SK_PAGE_UP:
s = windowid ? ltgetstr("kP", &sp) : k_pageup;
break;
case SK_PAGE_DOWN:
s = windowid ? ltgetstr("kN", &sp) : k_pagedown;
break;
case SK_HOME:
s = windowid ? ltgetstr("kh", &sp) : k_home;
break;
case SK_END:
s = windowid ? ltgetstr("@7", &sp) : k_end;
break;
case SK_DELETE:
if (windowid)
{
s = ltgetstr("kD", &sp);
if (s == NULL)
{
tbuf[0] = '\177';
tbuf[1] = '\0';
s = tbuf;
}
} else
s = k_delete;
break;
#endif
#if MSDOS_COMPILER
case SK_RIGHT_ARROW:
s = k_right;
break;
case SK_LEFT_ARROW:
s = k_left;
break;
case SK_UP_ARROW:
s = k_up;
break;
case SK_DOWN_ARROW:
s = k_down;
break;
case SK_PAGE_UP:
s = k_pageup;
break;
case SK_PAGE_DOWN:
s = k_pagedown;
break;
case SK_HOME:
s = k_home;
break;
case SK_END:
s = k_end;
break;
case SK_DELETE:
s = k_delete;
break;
#endif
#if MSDOS_COMPILER || OS2
case SK_INSERT:
s = k_insert;
break;
case SK_CTL_LEFT_ARROW:
s = k_ctl_left;
break;
case SK_CTL_RIGHT_ARROW:
s = k_ctl_right;
break;
case SK_CTL_BACKSPACE:
s = k_ctl_backspace;
break;
case SK_CTL_DELETE:
s = k_ctl_delete;
break;
case SK_F1:
s = k_f1;
break;
case SK_BACKTAB:
s = k_backtab;
break;
#else
case SK_RIGHT_ARROW:
s = ltgetstr("kr", &sp);
break;
case SK_LEFT_ARROW:
s = ltgetstr("kl", &sp);
break;
case SK_UP_ARROW:
s = ltgetstr("ku", &sp);
break;
case SK_DOWN_ARROW:
s = ltgetstr("kd", &sp);
break;
case SK_PAGE_UP:
s = ltgetstr("kP", &sp);
break;
case SK_PAGE_DOWN:
s = ltgetstr("kN", &sp);
break;
case SK_HOME:
s = ltgetstr("kh", &sp);
break;
case SK_END:
s = ltgetstr("@7", &sp);
break;
case SK_DELETE:
s = ltgetstr("kD", &sp);
if (s == NULL)
{
tbuf[0] = '\177';
tbuf[1] = '\0';
s = tbuf;
}
break;
#endif
case SK_CONTROL_K:
tbuf[0] = CONTROL('K');
tbuf[1] = '\0';
s = tbuf;
break;
default:
return (NULL);
}
return (s);
}
/*
* Get terminal capabilities via termcap.
*/
public void
get_term()
{
#if MSDOS_COMPILER
auto_wrap = 1;
ignaw = 0;
can_goto_line = 1;
clear_bg = 1;
/*
* Set up default colors.
* The xx_s_width and xx_e_width vars are already initialized to 0.
*/
#if MSDOS_COMPILER==MSOFTC
sy_bg_color = _getbkcolor();
sy_fg_color = _gettextcolor();
get_clock();
#else
#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
{
struct text_info w;
gettextinfo(&w);
sy_bg_color = (w.attribute >> 4) & 0x0F;
sy_fg_color = (w.attribute >> 0) & 0x0F;
}
#else
#if MSDOS_COMPILER==WIN32C
{
DWORD nread;
CONSOLE_SCREEN_BUFFER_INFO scr;
con_out_save = con_out = GetStdHandle(STD_OUTPUT_HANDLE);
/*
* Always open stdin in binary. Note this *must* be done
* before any file operations have been done on fd0.
*/
SET_BINARY(0);
GetConsoleScreenBufferInfo(con_out, &scr);
ReadConsoleOutputAttribute(con_out, &curr_attr,
1, scr.dwCursorPosition, &nread);
sy_bg_color = (curr_attr & BG_COLORS) >> 4; /* normalize */
sy_fg_color = curr_attr & FG_COLORS;
}
#endif
#endif
#endif
nm_fg_color = sy_fg_color;
nm_bg_color = sy_bg_color;
bo_fg_color = 11;
bo_bg_color = 0;
ul_fg_color = 9;
ul_bg_color = 0;
so_fg_color = 15;
so_bg_color = 9;
bl_fg_color = 15;
bl_bg_color = 0;
/*
* Get size of the screen.
*/
scrsize();
pos_init();
#else /* !MSDOS_COMPILER */
char *sp;
register char *t1, *t2;
char *term;
char termbuf[TERMBUF_SIZE];
static char sbuf[TERMSBUF_SIZE];
#if OS2
/*
* Make sure the termcap database is available.
*/
sp = lgetenv("TERMCAP");
if (sp == NULL || *sp == '\0')
{
char *termcap;
if ((sp = homefile("termcap.dat")) != NULL)
{
termcap = (char *) ecalloc(strlen(sp)+9, sizeof(char));
sprintf(termcap, "TERMCAP=%s", sp);
free(sp);
putenv(termcap);
}
}
#endif
/*
* Find out what kind of terminal this is.
*/
if ((term = lgetenv("TERM")) == NULL)
term = DEFAULT_TERM;
hardcopy = 0;
if (tgetent(termbuf, term) <= 0)
hardcopy = 1;
if (ltgetflag("hc"))
hardcopy = 1;
/*
* Get size of the screen.
*/
scrsize();
pos_init();
auto_wrap = ltgetflag("am");
ignaw = ltgetflag("xn");
above_mem = ltgetflag("da");
below_mem = ltgetflag("db");
clear_bg = ltgetflag("ut");
/*
* Assumes termcap variable "sg" is the printing width of:
* the standout sequence, the end standout sequence,
* the underline sequence, the end underline sequence,
* the boldface sequence, and the end boldface sequence.
*/
if ((so_s_width = ltgetnum("sg")) < 0)
so_s_width = 0;
so_e_width = so_s_width;
bo_s_width = bo_e_width = so_s_width;
ul_s_width = ul_e_width = so_s_width;
bl_s_width = bl_e_width = so_s_width;
#if HILITE_SEARCH
if (so_s_width > 0 || so_e_width > 0)
/*
* Disable highlighting by default on magic cookie terminals.
* Turning on highlighting might change the displayed width
* of a line, causing the display to get messed up.
* The user can turn it back on with -g,
* but she won't like the results.
*/
hilite_search = 0;
#endif
/*
* Get various string-valued capabilities.
*/
sp = sbuf;
#if HAVE_OSPEED
sc_pad = ltgetstr("pc", &sp);
if (sc_pad != NULL)
PC = *sc_pad;
#endif
sc_s_keypad = ltgetstr("ks", &sp);
if (sc_s_keypad == NULL)
sc_s_keypad = "";
sc_e_keypad = ltgetstr("ke", &sp);
if (sc_e_keypad == NULL)
sc_e_keypad = "";
/*
* This loses for terminals with termcap entries with ti/te strings
* that switch to/from an alternate screen, and we're in quit_at_eof
* (eg, more(1)).
*/
if (!quit_at_eof && !more_mode) {
sc_init = ltgetstr("ti", &sp);
sc_deinit = ltgetstr("te", &sp);
}
if (sc_init == NULL)
sc_init = "";
if (sc_deinit == NULL)
sc_deinit = "";
sc_eol_clear = ltgetstr("ce", &sp);
if (sc_eol_clear == NULL || *sc_eol_clear == '\0')
{
missing_cap = 1;
sc_eol_clear = "";
}
sc_eos_clear = ltgetstr("cd", &sp);
if (below_mem && (sc_eos_clear == NULL || *sc_eos_clear == '\0'))
{
missing_cap = 1;
sc_eol_clear = "";
}
sc_clear = ltgetstr("cl", &sp);
if (sc_clear == NULL || *sc_clear == '\0')
{
missing_cap = 1;
sc_clear = "\n\n";
}
sc_move = ltgetstr("cm", &sp);
if (sc_move == NULL || *sc_move == '\0')
{
/*
* This is not an error here, because we don't
* always need sc_move.
* We need it only if we don't have home or lower-left.
*/
sc_move = "";
can_goto_line = 0;
} else
can_goto_line = 1;
tmodes("so", "se", &sc_s_in, &sc_s_out, "", "", &sp);
tmodes("us", "ue", &sc_u_in, &sc_u_out, sc_s_in, sc_s_out, &sp);
tmodes("md", "me", &sc_b_in, &sc_b_out, sc_s_in, sc_s_out, &sp);
tmodes("mb", "me", &sc_bl_in, &sc_bl_out, sc_s_in, sc_s_out, &sp);
sc_visual_bell = ltgetstr("vb", &sp);
if (sc_visual_bell == NULL)
sc_visual_bell = "";
if (ltgetflag("bs"))
sc_backspace = "\b";
else
{
sc_backspace = ltgetstr("bc", &sp);
if (sc_backspace == NULL || *sc_backspace == '\0')
sc_backspace = "\b";
}
/*
* Choose between using "ho" and "cm" ("home" and "cursor move")
* to move the cursor to the upper left corner of the screen.
*/
t1 = ltgetstr("ho", &sp);
if (t1 == NULL)
t1 = "";
if (*sc_move == '\0')
t2 = "";
else
{
strcpy(sp, tgoto(sc_move, 0, 0));
t2 = sp;
sp += strlen(sp) + 1;
}
sc_home = cheaper(t1, t2, "|\b^");
/*
* Choose between using "ll" and "cm" ("lower left" and "cursor move")
* to move the cursor to the lower left corner of the screen.
*/
t1 = ltgetstr("ll", &sp);
if (t1 == NULL)
t1 = "";
if (*sc_move == '\0')
t2 = "";
else
{
strcpy(sp, tgoto(sc_move, 0, sc_height-1));
t2 = sp;
sp += strlen(sp) + 1;
}
sc_lower_left = cheaper(t1, t2, "\r");
/*
* Choose between using "al" or "sr" ("add line" or "scroll reverse")
* to add a line at the top of the screen.
*/
t1 = ltgetstr("al", &sp);
if (t1 == NULL)
t1 = "";
t2 = ltgetstr("sr", &sp);
if (t2 == NULL)
t2 = "";
#if OS2
if (*t1 == '\0' && *t2 == '\0')
sc_addline = "";
else
#endif
if (above_mem)
sc_addline = t1;
else
sc_addline = cheaper(t1, t2, "");
if (*sc_addline == '\0')
{
/*
* Force repaint on any backward movement.
*/
no_back_scroll = 1;
}
#endif /* MSDOS_COMPILER */
}
#if !MSDOS_COMPILER
/*
* Return the cost of displaying a termcap string.
* We use the trick of calling tputs, but as a char printing function
* we give it inc_costcount, which just increments "costcount".
* This tells us how many chars would be printed by using this string.
* {{ Couldn't we just use strlen? }}
*/
static int costcount;
/*ARGSUSED*/
static int
inc_costcount(c)
int c;
{
costcount++;
return (c);
}
static int
cost(t)
char *t;
{
costcount = 0;
tputs(t, sc_height, inc_costcount);
return (costcount);
}
/*
* Return the "best" of the two given termcap strings.
* The best, if both exist, is the one with the lower
* cost (see cost() function).
*/
static char *
cheaper(t1, t2, def)
char *t1, *t2;
char *def;
{
if (*t1 == '\0' && *t2 == '\0')
{
missing_cap = 1;
return (def);
}
if (*t1 == '\0')
return (t2);
if (*t2 == '\0')
return (t1);
if (cost(t1) < cost(t2))
return (t1);
return (t2);
}
static void
tmodes(incap, outcap, instr, outstr, def_instr, def_outstr, spp)
char *incap;
char *outcap;
char **instr;
char **outstr;
char *def_instr;
char *def_outstr;
char **spp;
{
*instr = ltgetstr(incap, spp);
if (*instr == NULL)
{
/* Use defaults. */
*instr = def_instr;
*outstr = def_outstr;
return;
}
*outstr = ltgetstr(outcap, spp);
if (*outstr == NULL)
/* No specific out capability; use "me". */
*outstr = ltgetstr("me", spp);
if (*outstr == NULL)
/* Don't even have "me"; use a null string. */
*outstr = "";
}
#endif /* MSDOS_COMPILER */
/*
* Below are the functions which perform all the
* terminal-specific screen manipulation.
*/
#if MSDOS_COMPILER
#if MSDOS_COMPILER==WIN32C
static void
_settextposition(int row, int col)
{
COORD cpos;
CONSOLE_SCREEN_BUFFER_INFO csbi;
GetConsoleScreenBufferInfo(con_out, &csbi);
cpos.X = csbi.srWindow.Left + (col - 1);
cpos.Y = csbi.srWindow.Top + (row - 1);
SetConsoleCursorPosition(con_out, cpos);
}
#endif
/*
* Initialize the screen to the correct color at startup.
*/
static void
initcolor()
{
SETCOLORS(nm_fg_color, nm_bg_color);
#if 0
/*
* This clears the screen at startup. This is different from
* the behavior of other versions of less. Disable it for now.
*/
char *blanks;
int row;
int col;
/*
* Create a complete, blank screen using "normal" colors.
*/
SETCOLORS(nm_fg_color, nm_bg_color);
blanks = (char *) ecalloc(width+1, sizeof(char));
for (col = 0; col < sc_width; col++)
blanks[col] = ' ';
blanks[sc_width] = '\0';
for (row = 0; row < sc_height; row++)
_outtext(blanks);
free(blanks);
#endif
}
#endif
#if MSDOS_COMPILER==WIN32C
/*
* Termcap-like init with a private win32 console.
*/
static void
win32_init_term()
{
CONSOLE_SCREEN_BUFFER_INFO scr;
COORD size;
if (con_out_save == INVALID_HANDLE_VALUE)
return;
GetConsoleScreenBufferInfo(con_out_save, &scr);
if (con_out_ours == INVALID_HANDLE_VALUE)
{
/*
* Create our own screen buffer, so that we
* may restore the original when done.
*/
con_out_ours = CreateConsoleScreenBuffer(
GENERIC_WRITE | GENERIC_READ,
FILE_SHARE_WRITE | FILE_SHARE_READ,
(LPSECURITY_ATTRIBUTES) NULL,
CONSOLE_TEXTMODE_BUFFER,
(LPVOID) NULL);
}
size.X = scr.srWindow.Right - scr.srWindow.Left + 1;
size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1;
SetConsoleScreenBufferSize(con_out_ours, size);
SetConsoleActiveScreenBuffer(con_out_ours);
con_out = con_out_ours;
}
/*
* Restore the startup console.
*/
static void
win32_deinit_term()
{
if (con_out_save == INVALID_HANDLE_VALUE)
return;
if (quitting)
(void) CloseHandle(con_out_ours);
SetConsoleActiveScreenBuffer(con_out_save);
con_out = con_out_save;
}
#endif
/*
* Initialize terminal
*/
public void
init()
{
#if !MSDOS_COMPILER
if (!no_init)
tputs(sc_init, sc_height, putchr);
if (!no_keypad)
tputs(sc_s_keypad, sc_height, putchr);
#else
#if MSDOS_COMPILER==WIN32C
if (!no_init)
win32_init_term();
#endif
initcolor();
flush();
#endif
init_done = 1;
}
/*
* Deinitialize terminal
*/
public void
deinit()
{
if (!init_done)
return;
#if !MSDOS_COMPILER
if (!no_keypad)
tputs(sc_e_keypad, sc_height, putchr);
if (!no_init)
tputs(sc_deinit, sc_height, putchr);
#else
/* Restore system colors. */
SETCOLORS(sy_fg_color, sy_bg_color);
#if MSDOS_COMPILER==WIN32C
if (!no_init)
win32_deinit_term();
#else
/* Need clreol to make SETCOLORS take effect. */
clreol();
#endif
#endif
init_done = 0;
}
/*
* Home cursor (move to upper left corner of screen).
*/
public void
home()
{
#if !MSDOS_COMPILER
tputs(sc_home, 1, putchr);
#else
flush();
_settextposition(1,1);
#endif
}
/*
* Add a blank line (called with cursor at home).
* Should scroll the display down.
*/
public void
add_line()
{
#if !MSDOS_COMPILER
tputs(sc_addline, sc_height, putchr);
#else
flush();
#if MSDOS_COMPILER==MSOFTC
_scrolltextwindow(_GSCROLLDOWN);
_settextposition(1,1);
#else
#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
movetext(1,1, sc_width,sc_height-1, 1,2);
gotoxy(1,1);
clreol();
#else
#if MSDOS_COMPILER==WIN32C
{
CHAR_INFO fillchar;
SMALL_RECT rcSrc, rcClip;
COORD new_org;
CONSOLE_SCREEN_BUFFER_INFO csbi;
GetConsoleScreenBufferInfo(con_out,&csbi);
/* The clip rectangle is the entire visible screen. */
rcClip.Left = csbi.srWindow.Left;
rcClip.Top = csbi.srWindow.Top;
rcClip.Right = csbi.srWindow.Right;
rcClip.Bottom = csbi.srWindow.Bottom;
/* The source rectangle is the visible screen minus the last line. */
rcSrc = rcClip;
rcSrc.Bottom--;
/* Move the top left corner of the source window down one row. */
new_org.X = rcSrc.Left;
new_org.Y = rcSrc.Top + 1;
/* Fill the right character and attributes. */
fillchar.Char.AsciiChar = ' ';
curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
fillchar.Attributes = curr_attr;
ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar);
_settextposition(1,1);
}
#endif
#endif
#endif
#endif
}
#if 0
/*
* Remove the n topmost lines and scroll everything below it in the
* window upward. This is needed to stop leaking the topmost line
* into the scrollback buffer when we go down-one-line (in WIN32).
*/
public void
remove_top(n)
int n;
{
#if MSDOS_COMPILER==WIN32C
SMALL_RECT rcSrc, rcClip;
CHAR_INFO fillchar;
COORD new_org;
CONSOLE_SCREEN_BUFFER_INFO csbi; /* to get buffer info */
if (n >= sc_height - 1)
{
clear();
home();
return;
}
flush();
GetConsoleScreenBufferInfo(con_out, &csbi);
/* Get the extent of all-visible-rows-but-the-last. */
rcSrc.Left = csbi.srWindow.Left;
rcSrc.Top = csbi.srWindow.Top + n;
rcSrc.Right = csbi.srWindow.Right;
rcSrc.Bottom = csbi.srWindow.Bottom;
/* Get the clip rectangle. */
rcClip.Left = rcSrc.Left;
rcClip.Top = csbi.srWindow.Top;
rcClip.Right = rcSrc.Right;
rcClip.Bottom = rcSrc.Bottom ;
/* Move the source window up n rows. */
new_org.X = rcSrc.Left;
new_org.Y = rcSrc.Top - n;
/* Fill the right character and attributes. */
fillchar.Char.AsciiChar = ' ';
curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
fillchar.Attributes = curr_attr;
ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar);
/* Position cursor on first blank line. */
goto_line(sc_height - n - 1);
#endif
}
#endif
#if MSDOS_COMPILER==WIN32C
/*
* Clear the screen.
*/
static void
win32_clear()
{
/*
* This will clear only the currently visible rows of the NT
* console buffer, which means none of the precious scrollback
* rows are touched making for faster scrolling. Note that, if
* the window has fewer columns than the console buffer (i.e.
* there is a horizontal scrollbar as well), the entire width
* of the visible rows will be cleared.
*/
COORD topleft;
DWORD nchars;
DWORD winsz;
CONSOLE_SCREEN_BUFFER_INFO csbi;
/* get the number of cells in the current buffer */
GetConsoleScreenBufferInfo(con_out, &csbi);
winsz = csbi.dwSize.X * (csbi.srWindow.Bottom - csbi.srWindow.Top + 1);
topleft.X = 0;
topleft.Y = csbi.srWindow.Top;
curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
FillConsoleOutputCharacter(con_out, ' ', winsz, topleft, &nchars);
FillConsoleOutputAttribute(con_out, curr_attr, winsz, topleft, &nchars);
}
/*
* Remove the n topmost lines and scroll everything below it in the
* window upward.
*/
public void
win32_scroll_up(n)
int n;
{
SMALL_RECT rcSrc, rcClip;
CHAR_INFO fillchar;
COORD topleft;
COORD new_org;
DWORD nchars;
DWORD size;
CONSOLE_SCREEN_BUFFER_INFO csbi;
if (n <= 0)
return;
if (n >= sc_height - 1)
{
win32_clear();
_settextposition(1,1);
return;
}
/* Get the extent of what will remain visible after scrolling. */
GetConsoleScreenBufferInfo(con_out, &csbi);
rcSrc.Left = csbi.srWindow.Left;
rcSrc.Top = csbi.srWindow.Top + n;
rcSrc.Right = csbi.srWindow.Right;
rcSrc.Bottom = csbi.srWindow.Bottom;
/* Get the clip rectangle. */
rcClip.Left = rcSrc.Left;
rcClip.Top = csbi.srWindow.Top;
rcClip.Right = rcSrc.Right;
rcClip.Bottom = rcSrc.Bottom ;
/* Move the source text to the top of the screen. */
new_org.X = rcSrc.Left;
new_org.Y = 0;
/* Fill the right character and attributes. */
fillchar.Char.AsciiChar = ' ';
fillchar.Attributes = MAKEATTR(nm_fg_color, nm_bg_color);
/* Scroll the window. */
SetConsoleTextAttribute(con_out, fillchar.Attributes);
ScrollConsoleScreenBuffer(con_out, &rcSrc, &rcClip, new_org, &fillchar);
/* Clear remaining lines at bottom. */
topleft.X = csbi.dwCursorPosition.X;
topleft.Y = rcSrc.Bottom - n;
size = (n * csbi.dwSize.X) + (rcSrc.Right - topleft.X);
FillConsoleOutputCharacter(con_out, ' ', size, topleft,
&nchars);
FillConsoleOutputAttribute(con_out, fillchar.Attributes, size, topleft,
&nchars);
SetConsoleTextAttribute(con_out, curr_attr);
/* Move cursor n lines up from where it was. */
csbi.dwCursorPosition.Y -= n;
SetConsoleCursorPosition(con_out, csbi.dwCursorPosition);
}
#endif
/*
* Move cursor to lower left corner of screen.
*/
public void
lower_left()
{
#if !MSDOS_COMPILER
tputs(sc_lower_left, 1, putchr);
#else
flush();
_settextposition(sc_height, 1);
#endif
}
/*
* Check if the console size has changed and reset internals
* (in lieu of SIGWINCH for WIN32).
*/
public void
check_winch()
{
#if MSDOS_COMPILER==WIN32C
CONSOLE_SCREEN_BUFFER_INFO scr;
COORD size;
if (con_out == INVALID_HANDLE_VALUE)
return;
flush();
GetConsoleScreenBufferInfo(con_out, &scr);
size.Y = scr.srWindow.Bottom - scr.srWindow.Top + 1;
size.X = scr.srWindow.Right - scr.srWindow.Left + 1;
if (size.Y != sc_height || size.X != sc_width)
{
sc_height = size.Y;
sc_width = size.X;
if (!no_init && con_out_ours == con_out)
SetConsoleScreenBufferSize(con_out, size);
pos_init();
wscroll = (sc_height + 1) / 2;
screen_trashed = 1;
}
#endif
}
/*
* Goto a specific line on the screen.
*/
public void
goto_line(slinenum)
int slinenum;
{
#if !MSDOS_COMPILER
tputs(tgoto(sc_move, 0, slinenum), 1, putchr);
#else
flush();
_settextposition(slinenum+1, 1);
#endif
}
#if MSDOS_COMPILER==MSOFTC || MSDOS_COMPILER==BORLANDC
/*
* Create an alternate screen which is all white.
* This screen is used to create a "flash" effect, by displaying it
* briefly and then switching back to the normal screen.
* {{ Yuck! There must be a better way to get a visual bell. }}
*/
static void
create_flash()
{
#if MSDOS_COMPILER==MSOFTC
struct videoconfig w;
char *blanks;
int row, col;
_getvideoconfig(&w);
videopages = w.numvideopages;
if (videopages < 2)
{
so_enter();
so_exit();
} else
{
_setactivepage(1);
so_enter();
blanks = (char *) ecalloc(w.numtextcols, sizeof(char));
for (col = 0; col < w.numtextcols; col++)
blanks[col] = ' ';
for (row = w.numtextrows; row > 0; row--)
_outmem(blanks, w.numtextcols);
_setactivepage(0);
_setvisualpage(0);
free(blanks);
so_exit();
}
#else
#if MSDOS_COMPILER==BORLANDC
register int n;
whitescreen = (unsigned short *)
malloc(sc_width * sc_height * sizeof(short));
if (whitescreen == NULL)
return;
for (n = 0; n < sc_width * sc_height; n++)
whitescreen[n] = 0x7020;
#else
#if MSDOS_COMPILER==WIN32C
register int n;
whitescreen = (WORD *)
malloc(sc_height * sc_width * sizeof(WORD));
if (whitescreen == NULL)
return;
/* Invert the standard colors. */
for (n = 0; n < sc_width * sc_height; n++)
whitescreen[n] = (WORD)((nm_fg_color << 4) | nm_bg_color);
#endif
#endif
#endif
flash_created = 1;
}
#endif /* MSDOS_COMPILER */
/*
* Output the "visual bell", if there is one.
*/
public void
vbell()
{
#if !MSDOS_COMPILER
if (*sc_visual_bell == '\0')
return;
tputs(sc_visual_bell, sc_height, putchr);
#else
#if MSDOS_COMPILER==DJGPPC
ScreenVisualBell();
#else
#if MSDOS_COMPILER==MSOFTC
/*
* Create a flash screen on the second video page.
* Switch to that page, then switch back.
*/
if (!flash_created)
create_flash();
if (videopages < 2)
return;
_setvisualpage(1);
delay(100);
_setvisualpage(0);
#else
#if MSDOS_COMPILER==BORLANDC
unsigned short *currscreen;
/*
* Get a copy of the current screen.
* Display the flash screen.
* Then restore the old screen.
*/
if (!flash_created)
create_flash();
if (whitescreen == NULL)
return;
currscreen = (unsigned short *)
malloc(sc_width * sc_height * sizeof(short));
if (currscreen == NULL) return;
gettext(1, 1, sc_width, sc_height, currscreen);
puttext(1, 1, sc_width, sc_height, whitescreen);
delay(100);
puttext(1, 1, sc_width, sc_height, currscreen);
free(currscreen);
#else
#if MSDOS_COMPILER==WIN32C
/* paint screen with an inverse color */
clear();
/* leave it displayed for 100 msec. */
Sleep(100);
/* restore with a redraw */
repaint();
#endif
#endif
#endif
#endif
#endif
}
/*
* Make a noise.
*/
static void
beep()
{
#if !MSDOS_COMPILER
putchr(CONTROL('G'));
#else
#if MSDOS_COMPILER==WIN32C
MessageBeep(0);
#else
write(1, "\7", 1);
#endif
#endif
}
/*
* Ring the terminal bell.
*/
public void
bell()
{
if (quiet == VERY_QUIET)
vbell();
else
beep();
}
/*
* Clear the screen.
*/
public void
clear()
{
#if !MSDOS_COMPILER
tputs(sc_clear, sc_height, putchr);
#else
flush();
#if MSDOS_COMPILER==WIN32C
win32_clear();
#else
_clearscreen(_GCLEARSCREEN);
#endif
#endif
}
/*
* Clear from the cursor to the end of the cursor's line.
* {{ This must not move the cursor. }}
*/
public void
clear_eol()
{
#if !MSDOS_COMPILER
tputs(sc_eol_clear, 1, putchr);
#else
#if MSDOS_COMPILER==MSOFTC
short top, left;
short bot, right;
struct rccoord tpos;
flush();
/*
* Save current state.
*/
tpos = _gettextposition();
_gettextwindow(&top, &left, &bot, &right);
/*
* Set a temporary window to the current line,
* from the cursor's position to the right edge of the screen.
* Then clear that window.
*/
_settextwindow(tpos.row, tpos.col, tpos.row, sc_width);
_clearscreen(_GWINDOW);
/*
* Restore state.
*/
_settextwindow(top, left, bot, right);
_settextposition(tpos.row, tpos.col);
#else
#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
flush();
clreol();
#else
#if MSDOS_COMPILER==WIN32C
DWORD nchars;
COORD cpos;
CONSOLE_SCREEN_BUFFER_INFO scr;
flush();
memset(&scr, 0, sizeof(scr));
GetConsoleScreenBufferInfo(con_out, &scr);
cpos.X = scr.dwCursorPosition.X;
cpos.Y = scr.dwCursorPosition.Y;
curr_attr = MAKEATTR(nm_fg_color, nm_bg_color);
FillConsoleOutputAttribute(con_out, curr_attr,
scr.dwSize.X - cpos.X, cpos, &nchars);
FillConsoleOutputCharacter(con_out, ' ',
scr.dwSize.X - cpos.X, cpos, &nchars);
#endif
#endif
#endif
#endif
}
/*
* Clear the current line.
* Clear the screen if there's off-screen memory below the display.
*/
static void
clear_eol_bot()
{
#if MSDOS_COMPILER
clear_eol();
#else
if (below_mem)
tputs(sc_eos_clear, 1, putchr);
else
tputs(sc_eol_clear, 1, putchr);
#endif
}
/*
* Clear the bottom line of the display.
* Leave the cursor at the beginning of the bottom line.
*/
public void
clear_bot()
{
/*
* If we're in a non-normal attribute mode, temporarily exit
* the mode while we do the clear. Some terminals fill the
* cleared area with the current attribute.
*/
lower_left();
switch (attrmode)
{
case AT_STANDOUT:
so_exit();
clear_eol_bot();
so_enter();
break;
case AT_UNDERLINE:
ul_exit();
clear_eol_bot();
ul_enter();
break;
case AT_BOLD:
bo_exit();
clear_eol_bot();
bo_enter();
break;
case AT_BLINK:
bl_exit();
clear_eol_bot();
bl_enter();
break;
default:
clear_eol_bot();
break;
}
}
/*
* Begin "standout" (bold, underline, or whatever).
*/
public void
so_enter()
{
#if !MSDOS_COMPILER
tputs(sc_s_in, 1, putchr);
#else
flush();
SETCOLORS(so_fg_color, so_bg_color);
#endif
attrmode = AT_STANDOUT;
}
/*
* End "standout".
*/
public void
so_exit()
{
#if !MSDOS_COMPILER
tputs(sc_s_out, 1, putchr);
#else
flush();
SETCOLORS(nm_fg_color, nm_bg_color);
#endif
attrmode = AT_NORMAL;
}
/*
* Begin "underline" (hopefully real underlining,
* otherwise whatever the terminal provides).
*/
public void
ul_enter()
{
#if !MSDOS_COMPILER
tputs(sc_u_in, 1, putchr);
#else
flush();
SETCOLORS(ul_fg_color, ul_bg_color);
#endif
attrmode = AT_UNDERLINE;
}
/*
* End "underline".
*/
public void
ul_exit()
{
#if !MSDOS_COMPILER
tputs(sc_u_out, 1, putchr);
#else
flush();
SETCOLORS(nm_fg_color, nm_bg_color);
#endif
attrmode = AT_NORMAL;
}
/*
* Begin "bold"
*/
public void
bo_enter()
{
#if !MSDOS_COMPILER
tputs(sc_b_in, 1, putchr);
#else
flush();
SETCOLORS(bo_fg_color, bo_bg_color);
#endif
attrmode = AT_BOLD;
}
/*
* End "bold".
*/
public void
bo_exit()
{
#if !MSDOS_COMPILER
tputs(sc_b_out, 1, putchr);
#else
flush();
SETCOLORS(nm_fg_color, nm_bg_color);
#endif
attrmode = AT_NORMAL;
}
/*
* Begin "blink"
*/
public void
bl_enter()
{
#if !MSDOS_COMPILER
tputs(sc_bl_in, 1, putchr);
#else
flush();
SETCOLORS(bl_fg_color, bl_bg_color);
#endif
attrmode = AT_BLINK;
}
/*
* End "blink".
*/
public void
bl_exit()
{
#if !MSDOS_COMPILER
tputs(sc_bl_out, 1, putchr);
#else
flush();
SETCOLORS(nm_fg_color, nm_bg_color);
#endif
attrmode = AT_NORMAL;
}
#if 0 /* No longer used */
/*
* Erase the character to the left of the cursor
* and move the cursor left.
*/
public void
backspace()
{
#if !MSDOS_COMPILER
/*
* Erase the previous character by overstriking with a space.
*/
tputs(sc_backspace, 1, putchr);
putchr(' ');
tputs(sc_backspace, 1, putchr);
#else
#if MSDOS_COMPILER==MSOFTC
struct rccoord tpos;
flush();
tpos = _gettextposition();
if (tpos.col <= 1)
return;
_settextposition(tpos.row, tpos.col-1);
_outtext(" ");
_settextposition(tpos.row, tpos.col-1);
#else
#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
cputs("\b");
#else
#if MSDOS_COMPILER==WIN32C
COORD cpos;
DWORD cChars;
CONSOLE_SCREEN_BUFFER_INFO scr;
flush();
GetConsoleScreenBufferInfo(con_out, &scr);
cpos = scr.dwCursorPosition;
if (cpos.X <= 0)
return;
cpos.X--;
SetConsoleCursorPosition(con_out, cpos);
FillConsoleOutputCharacter(con_out, (TCHAR)' ', 1, cpos, &cChars);
SetConsoleCursorPosition(con_out, cpos);
#endif
#endif
#endif
#endif
}
#endif /* 0 */
/*
* Output a plain backspace, without erasing the previous char.
*/
public void
putbs()
{
#if !MSDOS_COMPILER
tputs(sc_backspace, 1, putchr);
#else
int row, col;
flush();
{
#if MSDOS_COMPILER==MSOFTC
struct rccoord tpos;
tpos = _gettextposition();
row = tpos.row;
col = tpos.col;
#else
#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
row = wherey();
col = wherex();
#else
#if MSDOS_COMPILER==WIN32C
CONSOLE_SCREEN_BUFFER_INFO scr;
GetConsoleScreenBufferInfo(con_out, &scr);
row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1;
col = scr.dwCursorPosition.X - scr.srWindow.Left + 1;
#endif
#endif
#endif
}
if (col <= 1)
return;
_settextposition(row, col-1);
#endif /* MSDOS_COMPILER */
}
#if MSDOS_COMPILER==WIN32C
/*
* Determine whether an input character is waiting to be read.
*/
static int
win32_kbhit(tty)
HANDLE tty;
{
INPUT_RECORD ip;
DWORD read;
if (keyCount > 0)
return (TRUE);
currentKey.ascii = 0;
currentKey.scan = 0;
/*
* Wait for a real key-down event, but
* ignore SHIFT and CONTROL key events.
*/
do
{
PeekConsoleInput(tty, &ip, 1, &read);
if (read == 0)
return (FALSE);
ReadConsoleInput(tty, &ip, 1, &read);
} while (ip.EventType != KEY_EVENT ||
ip.Event.KeyEvent.bKeyDown != TRUE ||
ip.Event.KeyEvent.wVirtualScanCode == 0 ||
ip.Event.KeyEvent.wVirtualKeyCode == VK_SHIFT ||
ip.Event.KeyEvent.wVirtualKeyCode == VK_CONTROL ||
ip.Event.KeyEvent.wVirtualKeyCode == VK_MENU);
currentKey.ascii = ip.Event.KeyEvent.uChar.AsciiChar;
currentKey.scan = ip.Event.KeyEvent.wVirtualScanCode;
keyCount = ip.Event.KeyEvent.wRepeatCount;
if (ip.Event.KeyEvent.dwControlKeyState &
(LEFT_ALT_PRESSED | RIGHT_ALT_PRESSED))
{
switch (currentKey.scan)
{
case PCK_ALT_E: /* letter 'E' */
currentKey.ascii = 0;
break;
}
} else if (ip.Event.KeyEvent.dwControlKeyState &
(LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED))
{
switch (currentKey.scan)
{
case PCK_RIGHT: /* right arrow */
currentKey.scan = PCK_CTL_RIGHT;
break;
case PCK_LEFT: /* left arrow */
currentKey.scan = PCK_CTL_LEFT;
break;
case PCK_DELETE: /* delete */
currentKey.scan = PCK_CTL_DELETE;
break;
}
}
return (TRUE);
}
/*
* Read a character from the keyboard.
*/
public char
WIN32getch(tty)
int tty;
{
int ascii;
if (pending_scancode)
{
pending_scancode = 0;
return ((char)(currentKey.scan & 0x00FF));
}
while (win32_kbhit((HANDLE)tty) == FALSE)
{
Sleep(20);
if (ABORT_SIGS())
return ('\003');
continue;
}
keyCount --;
ascii = currentKey.ascii;
/*
* On PC's, the extended keys return a 2 byte sequence beginning
* with '00', so if the ascii code is 00, the next byte will be
* the lsb of the scan code.
*/
pending_scancode = (ascii == 0x00);
return ((char)ascii);
}
#endif
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