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freebsd-src/contrib/less/screen.c
Xin LI f80a33ea41 MFV: less v643. 
MFC after:	2 weeks
2023-08-13 00:13:31 -07:00

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/*
* Copyright (C) 1984-2023 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, 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>
#ifndef FOREGROUND_BLUE
#define FOREGROUND_BLUE 0x0001
#endif
#ifndef FOREGROUND_GREEN
#define FOREGROUND_GREEN 0x0002
#endif
#ifndef FOREGROUND_RED
#define FOREGROUND_RED 0x0004
#endif
#ifndef FOREGROUND_INTENSITY
#define FOREGROUND_INTENSITY 0x0008
#endif
#else
#if HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif
#if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS
#include <termios.h>
#else
#if HAVE_TERMIO_H
#include <termio.h>
#else
#if HAVE_SGSTAT_H
#include <sgstat.h>
#else
#include <sgtty.h>
#endif
#endif
#endif
#if HAVE_NCURSESW_TERMCAP_H
#include <ncursesw/termcap.h>
#else
#if HAVE_NCURSES_TERMCAP_H
#include <ncurses/termcap.h>
#else
#if HAVE_TERMCAP_H
#include <termcap.h>
#endif
#endif
#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 SET_FG_COLOR(fg) _settextcolor(fg)
#define SET_BG_COLOR(bg) _setbkcolor(bg)
#define SETCOLORS(fg,bg) { SET_FG_COLOR(fg); SET_BG_COLOR(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 SET_FG_COLOR(fg) textcolor(fg)
#define SET_BG_COLOR(bg) textbackground(bg)
#define SETCOLORS(fg,bg) { SET_FG_COLOR(fg); SET_BG_COLOR(bg); }
extern int sc_height;
#endif
#if MSDOS_COMPILER==WIN32C
#define UTF8_MAX_LENGTH 4
struct keyRecord
{
WCHAR unicode;
int ascii;
int scan;
} currentKey;
static int keyCount = 0;
static WORD curr_attr;
static int pending_scancode = 0;
static char x11mousebuf[] = "[M???"; /* Mouse report, after ESC */
static int x11mousePos, x11mouseCount;
static int win_unget_pending = FALSE;
static int win_unget_data;
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 utf_mode;
extern int quitting;
static void win32_init_term();
static void win32_deinit_term();
#ifndef ENABLE_VIRTUAL_TERMINAL_PROCESSING
#define ENABLE_VIRTUAL_TERMINAL_PROCESSING 4
#endif
#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 APPLY_COLORS() { if (SetConsoleTextAttribute(con_out, curr_attr) == 0) \
error("SETCOLORS failed", NULL_PARG); }
#define SET_FG_COLOR(fg) { curr_attr &= ~0x0f; curr_attr |= (fg); APPLY_COLORS(); }
#define SET_BG_COLOR(bg) { curr_attr &= ~0xf0; curr_attr |= ((bg)<<4); APPLY_COLORS(); }
#define SETCOLORS(fg,bg) { curr_attr = MAKEATTR(fg,bg); APPLY_COLORS(); }
#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;
public int sgr_mode; /* Honor ANSI sequences rather than using above */
#if MSDOS_COMPILER==WIN32C
static DWORD init_output_mode; /* The initial console output mode */
public int vt_enabled = -1; /* Is virtual terminal processing available? */
#endif
#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_return, /* Cursor to beginning of current line */
*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_s_mousecap, /* Start mouse capture mode */
*sc_e_mousecap, /* End mouse capture mode */
*sc_init, /* Startup terminal initialization */
*sc_deinit; /* Exit terminal de-initialization */
static int attrcolor = -1;
#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; /* The user's erase char */
public int erase2_char; /* The user's other erase char */
public int kill_char; /* The user's line-kill char */
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 */
public char *kent = NULL; /* Keypad ENTER sequence */
public int term_init_done = FALSE;
public int full_screen = TRUE;
static int attrmode = AT_NORMAL;
static int termcap_debug = -1;
static int no_alt_screen; /* sc_init does not switch to alt screen */
extern int binattr;
extern int one_screen;
#if LESSTEST
extern char *ttyin_name;
#endif /*LESSTEST*/
#if !MSDOS_COMPILER
static char *cheaper(char *t1, char *t2, char *def);
static void tmodes(char *incap, char *outcap, char **instr,
char **outstr, char *def_instr, char *def_outstr, char **spp);
#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_vbell;
extern int no_back_scroll;
extern int swindow;
extern int no_init;
extern int no_keypad;
extern int sigs;
extern int wscroll;
extern int screen_trashed;
extern int top_scroll;
extern int quit_if_one_screen;
extern int oldbot;
extern int mousecap;
extern int is_tty;
extern int use_color;
#if HILITE_SEARCH
extern int hilite_search;
#endif
#if MSDOS_COMPILER==WIN32C
extern HANDLE tty;
extern DWORD console_mode;
#ifndef ENABLE_EXTENDED_FLAGS
#define ENABLE_EXTENDED_FLAGS 0x80
#define ENABLE_QUICK_EDIT_MODE 0x40
#endif
#else
extern int tty;
#endif
#if (HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS) || defined(TCGETA)
/*
* Set termio flags for use by less.
*/
static void set_termio_flags(
#if HAVE_TERMIOS_H && HAVE_TERMIOS_FUNCS
struct termios *s
#else
struct termio *s
#endif
)
{
s->c_lflag &= ~(0
#ifdef ICANON
| ICANON
#endif
#ifdef ECHO
| ECHO
#endif
#ifdef ECHOE
| ECHOE
#endif
#ifdef ECHOK
| ECHOK
#endif
#ifdef 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
);
}
#endif
/*
* 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(int on)
{
static int curr_on = 0;
if (on == curr_on)
return;
erase2_char = '\b'; /* in case OS doesn't know about erase2 */
#if LESSTEST
if (ttyin_name != NULL)
{
/* {{ For consistent conditions when running tests. }} */
erase_char = '\b';
kill_char = CONTROL('U');
werase_char = CONTROL('W');
} else
#endif /*LESSTEST*/
#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.
*/
if (tcgetattr(tty, &s) < 0)
{
erase_char = '\b';
kill_char = CONTROL('U');
werase_char = CONTROL('W');
} else
{
/*
* 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];
#ifdef VERASE2
erase2_char = s.c_cc[VERASE2];
#endif
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.
*/
set_termio_flags(&s);
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
#ifdef VSTOP
s.c_cc[VSTOP] = 0;
#endif
#ifdef VSTART
s.c_cc[VSTART] = 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(tty);
#endif
tcsetattr(tty, 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(tty, 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(tty, 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.
*/
set_termio_flags(&s);
s.c_cc[VMIN] = 1;
s.c_cc[VTIME] = 0;
#ifdef VSTOP
s.c_cc[VSTOP] = 0;
#endif
#ifdef VSTART
s.c_cc[VSTART] = 0;
#endif
} else
{
/*
* Restore saved modes.
*/
s = save_term;
}
ioctl(tty, TCSETAW, &s);
}
#else
#ifdef TIOCGETP
{
struct sgttyb s;
static struct sgttyb save_term;
static int saved_term = 0;
if (on)
{
/*
* Get terminal modes.
*/
ioctl(tty, 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(tty, 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(tty, &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(tty, &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(char *capname)
{
char name[64];
if (termcap_debug)
{
struct env { struct env *next; char *name; char *value; };
static struct env *envs = NULL;
struct env *p;
for (p = envs; p != NULL; p = p->next)
if (strcmp(p->name, capname) == 0)
return p->value;
p = (struct env *) ecalloc(1, sizeof(struct env));
p->name = save(capname);
p->value = (char *) ecalloc(strlen(capname)+3, sizeof(char));
sprintf(p->value, "<%s>", capname);
p->next = envs;
envs = p;
return p->value;
}
SNPRINTF1(name, sizeof(name), "LESS_TERMCAP_%s", capname);
return (lgetenv(name));
}
static int ltgetflag(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(char *capname)
{
char *s;
if ((s = ltget_env(capname)) != NULL)
return (atoi(s));
if (hardcopy)
return (-1);
return (tgetnum(capname));
}
static char * ltgetstr(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(void)
{
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 LESSTEST
if (ttyin_name != NULL)
#endif /*LESSTEST*/
{
#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
if ((s = lgetenv("LESS_LINES")) != NULL)
{
int height = atoi(s);
sc_height = (height < 0) ? sc_height + height : height;
full_screen = FALSE;
}
if (sc_height <= 0)
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
if ((s = lgetenv("LESS_COLUMNS")) != NULL)
{
int width = atoi(s);
sc_width = (width < 0) ? sc_width + width : width;
}
if (sc_width <= 0)
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(void)
{
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 delay(int msec)
{
long i;
while (msec-- > 0)
{
for (i = 0; i < msec_loops; i++)
(void) clock();
}
}
#endif
/*
* Return the characters actually input by a "special" key.
*/
public char * special_key_str(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_backspace[] = { '\b', 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:
s = windowid ? ltgetstr("kD", &sp) : k_delete;
if (s == NULL)
{
tbuf[0] = '\177';
tbuf[1] = '\0';
s = tbuf;
}
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_BACKSPACE:
s = k_backspace;
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;
case SK_BACKSPACE:
s = ltgetstr("kb", &sp);
if (s == NULL)
{
tbuf[0] = '\b';
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(void)
{
termcap_debug = !isnullenv(lgetenv("LESS_TERMCAP_DEBUG"));
#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
{
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);
GetConsoleMode(con_out, &init_output_mode);
GetConsoleScreenBufferInfo(con_out, &scr);
curr_attr = scr.wAttributes;
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;
sgr_mode = 0;
/*
* Get size of the screen.
*/
scrsize();
pos_init();
#else /* !MSDOS_COMPILER */
{
char *sp;
char *t1, *t2;
char *term;
/*
* Some termcap libraries assume termbuf is static
* (accessible after tgetent returns).
*/
static char termbuf[TERMBUF_SIZE];
static char sbuf[TERMSBUF_SIZE];
#if OS2
/*
* Make sure the termcap database is available.
*/
sp = lgetenv("TERMCAP");
if (isnullenv(sp))
{
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;
/* {{ Should probably just pass NULL instead of termbuf. }} */
if (tgetent(termbuf, term) != TGETENT_OK)
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");
no_alt_screen = ltgetflag("NR");
/*
* 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 = "";
kent = ltgetstr("@8", &sp);
sc_s_mousecap = ltgetstr("MOUSE_START", &sp);
if (sc_s_mousecap == NULL)
sc_s_mousecap = ESCS "[?1000h" ESCS "[?1006h";
sc_e_mousecap = ltgetstr("MOUSE_END", &sp);
if (sc_e_mousecap == NULL)
sc_e_mousecap = ESCS "[?1006l" ESCS "[?1000l";
sc_init = ltgetstr("ti", &sp);
if (sc_init == NULL)
sc_init = "";
sc_deinit= ltgetstr("te", &sp);
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_eos_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 || !full_screen)
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");
/*
* Get carriage return string.
*/
sc_return = ltgetstr("cr", &sp);
if (sc_return == NULL)
sc_return = "\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(int c)
{
costcount++;
return (c);
}
static int cost(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(char *t1, char *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(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(void)
{
#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
intensevideo();
#endif
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
/*
* Enable virtual terminal processing, if available.
*/
static void win32_init_vt_term(void)
{
DWORD output_mode;
if (vt_enabled == 0 || (vt_enabled == 1 && con_out == con_out_ours))
return;
GetConsoleMode(con_out, &output_mode);
vt_enabled = SetConsoleMode(con_out,
output_mode | ENABLE_VIRTUAL_TERMINAL_PROCESSING);
if (vt_enabled)
{
auto_wrap = 0;
ignaw = 1;
}
}
static void win32_deinit_vt_term(void)
{
if (vt_enabled == 1 && con_out == con_out_save)
SetConsoleMode(con_out, init_output_mode);
}
/*
* Termcap-like init with a private win32 console.
*/
static void win32_init_term(void)
{
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(void)
{
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
#if !MSDOS_COMPILER
static void do_tputs(char *str, int affcnt, int (*f_putc)(int))
{
#if LESSTEST
if (ttyin_name != NULL && f_putc == putchr)
putstr(str);
else
#endif /*LESSTEST*/
tputs(str, affcnt, f_putc);
}
/*
* Like tputs but we handle $<...> delay strings here because
* some implementations of tputs don't perform delays correctly.
*/
static void ltputs(char *str, int affcnt, int (*f_putc)(int))
{
while (str != NULL && *str != '\0')
{
#if HAVE_STRSTR
char *obrac = strstr(str, "$<");
if (obrac != NULL)
{
char str2[64];
int slen = obrac - str;
if (slen < sizeof(str2))
{
int delay;
/* Output first part of string (before "$<"). */
memcpy(str2, str, slen);
str2[slen] = '\0';
do_tputs(str2, affcnt, f_putc);
str += slen + 2;
/* Perform the delay. */
delay = lstrtoi(str, &str, 10);
if (*str == '*')
if (ckd_mul(&delay, delay, affcnt))
delay = INT_MAX;
flush();
sleep_ms(delay);
/* Skip past closing ">" at end of delay string. */
str = strstr(str, ">");
if (str != NULL)
str++;
continue;
}
}
#endif
/* Pass the rest of the string to tputs and we're done. */
do_tputs(str, affcnt, f_putc);
break;
}
}
#endif /* MSDOS_COMPILER */
/*
* Configure the terminal so mouse clicks and wheel moves
* produce input to less.
*/
public void init_mouse(void)
{
#if !MSDOS_COMPILER
ltputs(sc_s_mousecap, sc_height, putchr);
#else
#if MSDOS_COMPILER==WIN32C
SetConsoleMode(tty, ENABLE_PROCESSED_INPUT | ENABLE_MOUSE_INPUT
| ENABLE_EXTENDED_FLAGS /* disable quick edit */);
#endif
#endif
}
/*
* Configure the terminal so mouse clicks and wheel moves
* are handled by the system (so text can be selected, etc).
*/
public void deinit_mouse(void)
{
#if !MSDOS_COMPILER
ltputs(sc_e_mousecap, sc_height, putchr);
#else
#if MSDOS_COMPILER==WIN32C
SetConsoleMode(tty, ENABLE_PROCESSED_INPUT | ENABLE_EXTENDED_FLAGS
| (console_mode & ENABLE_QUICK_EDIT_MODE));
#endif
#endif
}
/*
* Initialize terminal
*/
public void init(void)
{
clear_bot_if_needed();
#if !MSDOS_COMPILER
if (!(quit_if_one_screen && one_screen))
{
if (!no_init)
{
ltputs(sc_init, sc_height, putchr);
/*
* Some terminals leave the cursor unmoved when switching
* to the alt screen. To avoid having the text appear at
* a seemingly random line on the alt screen, move to
* lower left if we are using an alt screen.
*/
if (*sc_init != '\0' && *sc_deinit != '\0' && !no_alt_screen)
lower_left();
term_init_done = 1;
}
if (!no_keypad)
ltputs(sc_s_keypad, sc_height, putchr);
if (mousecap)
init_mouse();
}
init_done = 1;
if (top_scroll)
{
int i;
/*
* This is nice to terminals with no alternate screen,
* but with saved scrolled-off-the-top lines. This way,
* no previous line is lost, but we start with a whole
* screen to ourself.
*/
for (i = 1; i < sc_height; i++)
putchr('\n');
} else
line_left();
#else
#if MSDOS_COMPILER==WIN32C
if (!(quit_if_one_screen && one_screen))
{
if (!no_init)
{
win32_init_term();
term_init_done = 1;
}
if (mousecap)
init_mouse();
}
win32_init_vt_term();
#endif
init_done = 1;
initcolor();
flush();
#endif
}
/*
* Deinitialize terminal
*/
public void deinit(void)
{
if (!init_done)
return;
#if !MSDOS_COMPILER
if (!(quit_if_one_screen && one_screen))
{
if (mousecap)
deinit_mouse();
if (!no_keypad)
ltputs(sc_e_keypad, sc_height, putchr);
if (!no_init)
ltputs(sc_deinit, sc_height, putchr);
}
#else
/* Restore system colors. */
SETCOLORS(sy_fg_color, sy_bg_color);
#if MSDOS_COMPILER==WIN32C
win32_deinit_vt_term();
if (!(quit_if_one_screen && one_screen))
{
if (mousecap)
deinit_mouse();
if (!no_init)
win32_deinit_term();
}
#else
/* Need clreol to make SETCOLORS take effect. */
clreol();
#endif
#endif
init_done = 0;
}
/*
* Are we interactive (ie. writing to an initialized tty)?
*/
public int interactive(void)
{
return (is_tty && init_done);
}
static void assert_interactive(void)
{
if (interactive()) return;
/* abort(); */
}
/*
* Home cursor (move to upper left corner of screen).
*/
public void home(void)
{
assert_interactive();
#if !MSDOS_COMPILER
ltputs(sc_home, 1, putchr);
#else
flush();
_settextposition(1,1);
#endif
}
#if LESSTEST
public void dump_screen(void)
{
char dump_cmd[32];
SNPRINTF1(dump_cmd, sizeof(dump_cmd), ESCS"0;0;%dR", sc_width * sc_height);
ltputs(dump_cmd, sc_height, putchr);
flush();
}
#endif /*LESSTEST*/
/*
* Add a blank line (called with cursor at home).
* Should scroll the display down.
*/
public void add_line(void)
{
assert_interactive();
#if !MSDOS_COMPILER
ltputs(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(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(void)
{
/*
* 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(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 = rcClip.Top;
/* 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(void)
{
assert_interactive();
#if !MSDOS_COMPILER
ltputs(sc_lower_left, 1, putchr);
#else
flush();
_settextposition(sc_height, 1);
#endif
}
/*
* Move cursor to left position of current line.
*/
public void line_left(void)
{
assert_interactive();
#if !MSDOS_COMPILER
ltputs(sc_return, 1, putchr);
#else
{
int row;
flush();
#if MSDOS_COMPILER==WIN32C
{
CONSOLE_SCREEN_BUFFER_INFO scr;
GetConsoleScreenBufferInfo(con_out, &scr);
row = scr.dwCursorPosition.Y - scr.srWindow.Top + 1;
}
#else
#if MSDOS_COMPILER==BORLANDC || MSDOS_COMPILER==DJGPPC
row = wherey();
#else
{
struct rccoord tpos = _gettextposition();
row = tpos.row;
}
#endif
#endif
_settextposition(row, 1);
}
#endif
}
/*
* Check if the console size has changed and reset internals
* (in lieu of SIGWINCH for WIN32).
*/
public void check_winch(void)
{
#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(int sindex)
{
assert_interactive();
#if !MSDOS_COMPILER
ltputs(tgoto(sc_move, 0, sindex), 1, putchr);
#else
flush();
_settextposition(sindex+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(void)
{
#if MSDOS_COMPILER==MSOFTC
struct videoconfig w;
char *blanks;
int row, col;
_getvideoconfig(&w);
videopages = w.numvideopages;
if (videopages < 2)
{
at_enter(AT_STANDOUT);
at_exit();
} else
{
_setactivepage(1);
at_enter(AT_STANDOUT);
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);
at_exit();
}
#else
#if MSDOS_COMPILER==BORLANDC
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;
#endif
#endif
flash_created = 1;
}
#endif /* MSDOS_COMPILER */
/*
* Output the "visual bell", if there is one.
*/
public void vbell(void)
{
if (no_vbell)
return;
#if !MSDOS_COMPILER
if (*sc_visual_bell == '\0')
return;
ltputs(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(void)
{
#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(void)
{
if (quiet == VERY_QUIET)
vbell();
else
beep();
}
/*
* Clear the screen.
*/
public void clear(void)
{
assert_interactive();
#if !MSDOS_COMPILER
ltputs(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(void)
{
/* assert_interactive();*/
#if !MSDOS_COMPILER
ltputs(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(void)
{
assert_interactive();
#if MSDOS_COMPILER
clear_eol();
#else
if (below_mem)
ltputs(sc_eos_clear, 1, putchr);
else
ltputs(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(void)
{
/*
* 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.
*/
if (oldbot)
lower_left();
else
line_left();
if (attrmode == AT_NORMAL)
clear_eol_bot();
else
{
int saved_attrmode = attrmode;
at_exit();
clear_eol_bot();
at_enter(saved_attrmode);
}
}
/*
* Color string may be "x[y]" where x and y are 4-bit color chars,
* or "N[.M]" where N and M are decimal integers>
* Any of x,y,N,M may also be "-" to mean "unchanged".
*/
/*
* Parse a 4-bit color char.
*/
static int parse_color4(char ch)
{
switch (ch)
{
case 'k': return 0;
case 'r': return CV_RED;
case 'g': return CV_GREEN;
case 'y': return CV_RED|CV_GREEN;
case 'b': return CV_BLUE;
case 'm': return CV_RED|CV_BLUE;
case 'c': return CV_GREEN|CV_BLUE;
case 'w': return CV_RED|CV_GREEN|CV_BLUE;
case 'K': return 0|CV_BRIGHT;
case 'R': return CV_RED|CV_BRIGHT;
case 'G': return CV_GREEN|CV_BRIGHT;
case 'Y': return CV_RED|CV_GREEN|CV_BRIGHT;
case 'B': return CV_BLUE|CV_BRIGHT;
case 'M': return CV_RED|CV_BLUE|CV_BRIGHT;
case 'C': return CV_GREEN|CV_BLUE|CV_BRIGHT;
case 'W': return CV_RED|CV_GREEN|CV_BLUE|CV_BRIGHT;
case '-': return CV_NOCHANGE;
default: return CV_ERROR;
}
}
/*
* Parse a color as a decimal integer.
*/
static int parse_color6(char **ps)
{
if (**ps == '-')
{
(*ps)++;
return CV_NOCHANGE;
} else
{
char *ops = *ps;
int color = lstrtoi(ops, ps, 10);
if (color < 0 || *ps == ops)
return CV_ERROR;
return color;
}
}
/*
* Parse a color pair and return the foreground/background values.
* Return type of color specifier:
* CV_4BIT: fg/bg values are OR of CV_{RGB} bits.
* CV_6BIT: fg/bg values are integers entered by user.
*/
public COLOR_TYPE parse_color(char *str, int *p_fg, int *p_bg)
{
int fg;
int bg;
COLOR_TYPE type = CT_NULL;
if (str == NULL || *str == '\0')
return CT_NULL;
if (*str == '+')
str++; /* ignore leading + */
fg = parse_color4(str[0]);
bg = parse_color4((strlen(str) < 2) ? '-' : str[1]);
if (fg != CV_ERROR && bg != CV_ERROR)
type = CT_4BIT;
else
{
fg = parse_color6(&str);
bg = (fg != CV_ERROR && *str++ == '.') ? parse_color6(&str) : CV_NOCHANGE;
if (fg != CV_ERROR && bg != CV_ERROR)
type = CT_6BIT;
}
if (p_fg != NULL) *p_fg = fg;
if (p_bg != NULL) *p_bg = bg;
return type;
}
#if !MSDOS_COMPILER
static int sgr_color(int color)
{
switch (color)
{
case 0: return 30;
case CV_RED: return 31;
case CV_GREEN: return 32;
case CV_RED|CV_GREEN: return 33;
case CV_BLUE: return 34;
case CV_RED|CV_BLUE: return 35;
case CV_GREEN|CV_BLUE: return 36;
case CV_RED|CV_GREEN|CV_BLUE: return 37;
case CV_BRIGHT: return 90;
case CV_RED|CV_BRIGHT: return 91;
case CV_GREEN|CV_BRIGHT: return 92;
case CV_RED|CV_GREEN|CV_BRIGHT: return 93;
case CV_BLUE|CV_BRIGHT: return 94;
case CV_RED|CV_BLUE|CV_BRIGHT: return 95;
case CV_GREEN|CV_BLUE|CV_BRIGHT: return 96;
case CV_RED|CV_GREEN|CV_BLUE|CV_BRIGHT: return 97;
default: return color;
}
}
static void tput_fmt(char *fmt, int color, int (*f_putc)(int))
{
char buf[INT_STRLEN_BOUND(int)+16];
if (color == attrcolor)
return;
SNPRINTF1(buf, sizeof(buf), fmt, color);
ltputs(buf, 1, f_putc);
attrcolor = color;
}
static void tput_color(char *str, int (*f_putc)(int))
{
int fg;
int bg;
if (str != NULL && strcmp(str, "*") == 0)
{
/* Special case: reset to normal */
tput_fmt(ESCS"[m", -1, f_putc);
return;
}
switch (parse_color(str, &fg, &bg))
{
case CT_4BIT:
if (fg >= 0)
tput_fmt(ESCS"[%dm", sgr_color(fg), f_putc);
if (bg >= 0)
tput_fmt(ESCS"[%dm", sgr_color(bg)+10, f_putc);
break;
case CT_6BIT:
if (fg >= 0)
tput_fmt(ESCS"[38;5;%dm", fg, f_putc);
if (bg >= 0)
tput_fmt(ESCS"[48;5;%dm", bg, f_putc);
break;
default:
break;
}
}
static void tput_inmode(char *mode_str, int attr, int attr_bit, int (*f_putc)(int))
{
char *color_str;
if ((attr & attr_bit) == 0)
return;
color_str = get_color_map(attr_bit);
if (color_str == NULL || *color_str == '\0' || *color_str == '+')
{
ltputs(mode_str, 1, f_putc);
if (color_str == NULL || *color_str++ != '+')
return;
}
/* Color overrides mode string */
tput_color(color_str, f_putc);
}
static void tput_outmode(char *mode_str, int attr_bit, int (*f_putc)(int))
{
if ((attrmode & attr_bit) == 0)
return;
ltputs(mode_str, 1, f_putc);
}
#else /* MSDOS_COMPILER */
#if MSDOS_COMPILER==WIN32C
static int WIN32put_fmt(char *fmt, int color)
{
char buf[INT_STRLEN_BOUND(int)+16];
int len = SNPRINTF1(buf, sizeof(buf), fmt, color);
WIN32textout(buf, len);
return TRUE;
}
#endif
static int win_set_color(int attr)
{
int fg;
int bg;
int out = FALSE;
char *str = get_color_map(attr);
if (str == NULL || str[0] == '\0')
return FALSE;
switch (parse_color(str, &fg, &bg))
{
case CT_4BIT:
if (fg >= 0 && bg >= 0)
{
SETCOLORS(fg, bg);
out = TRUE;
} else if (fg >= 0)
{
SET_FG_COLOR(fg);
out = TRUE;
} else if (bg >= 0)
{
SET_BG_COLOR(bg);
out = TRUE;
}
break;
#if MSDOS_COMPILER==WIN32C
case CT_6BIT:
if (vt_enabled)
{
if (fg > 0)
out = WIN32put_fmt(ESCS"[38;5;%dm", fg);
if (bg > 0)
out = WIN32put_fmt(ESCS"[48;5;%dm", bg);
}
break;
#endif
default:
break;
}
return out;
}
#endif /* MSDOS_COMPILER */
public void at_enter(int attr)
{
attr = apply_at_specials(attr);
#if !MSDOS_COMPILER
/* The one with the most priority is last. */
tput_inmode(sc_u_in, attr, AT_UNDERLINE, putchr);
tput_inmode(sc_b_in, attr, AT_BOLD, putchr);
tput_inmode(sc_bl_in, attr, AT_BLINK, putchr);
/* Don't use standout and color at the same time. */
if (use_color && (attr & AT_COLOR))
tput_color(get_color_map(attr), putchr);
else
tput_inmode(sc_s_in, attr, AT_STANDOUT, putchr);
#else
flush();
/* The one with the most priority is first. */
if ((attr & AT_COLOR) && use_color)
{
win_set_color(attr);
} else if (attr & AT_STANDOUT)
{
SETCOLORS(so_fg_color, so_bg_color);
} else if (attr & AT_BLINK)
{
SETCOLORS(bl_fg_color, bl_bg_color);
} else if (attr & AT_BOLD)
{
SETCOLORS(bo_fg_color, bo_bg_color);
} else if (attr & AT_UNDERLINE)
{
SETCOLORS(ul_fg_color, ul_bg_color);
}
#endif
attrmode = attr;
}
public void at_exit(void)
{
#if !MSDOS_COMPILER
/* Undo things in the reverse order we did them. */
tput_color("*", putchr);
tput_outmode(sc_s_out, AT_STANDOUT, putchr);
tput_outmode(sc_bl_out, AT_BLINK, putchr);
tput_outmode(sc_b_out, AT_BOLD, putchr);
tput_outmode(sc_u_out, AT_UNDERLINE, putchr);
#else
flush();
SETCOLORS(nm_fg_color, nm_bg_color);
#endif
attrmode = AT_NORMAL;
}
public void at_switch(int attr)
{
int new_attrmode = apply_at_specials(attr);
int ignore_modes = AT_ANSI;
if ((new_attrmode & ~ignore_modes) != (attrmode & ~ignore_modes))
{
at_exit();
at_enter(attr);
}
}
public int is_at_equiv(int attr1, int attr2)
{
attr1 = apply_at_specials(attr1);
attr2 = apply_at_specials(attr2);
return (attr1 == attr2);
}
public int apply_at_specials(int attr)
{
if (attr & AT_BINARY)
attr |= binattr;
if (attr & AT_HILITE)
attr |= AT_STANDOUT;
attr &= ~(AT_BINARY|AT_HILITE);
return attr;
}
/*
* Output a plain backspace, without erasing the previous char.
*/
public void putbs(void)
{
if (termcap_debug)
putstr("<bs>");
else
{
#if !MSDOS_COMPILER
ltputs(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.
*/
public int win32_kbhit(void)
{
INPUT_RECORD ip;
DWORD read;
if (keyCount > 0 || win_unget_pending)
return (TRUE);
currentKey.ascii = 0;
currentKey.scan = 0;
if (x11mouseCount > 0)
{
currentKey.ascii = x11mousebuf[x11mousePos++];
--x11mouseCount;
keyCount = 1;
return (TRUE);
}
/*
* Wait for a real key-down event, but
* ignore SHIFT and CONTROL key events.
*/
do
{
PeekConsoleInputW(tty, &ip, 1, &read);
if (read == 0)
return (FALSE);
ReadConsoleInputW(tty, &ip, 1, &read);
/* generate an X11 mouse sequence from the mouse event */
if (mousecap && ip.EventType == MOUSE_EVENT &&
ip.Event.MouseEvent.dwEventFlags != MOUSE_MOVED)
{
x11mousebuf[3] = X11MOUSE_OFFSET + ip.Event.MouseEvent.dwMousePosition.X + 1;
x11mousebuf[4] = X11MOUSE_OFFSET + ip.Event.MouseEvent.dwMousePosition.Y + 1;
switch (ip.Event.MouseEvent.dwEventFlags)
{
case 0: /* press or release */
if (ip.Event.MouseEvent.dwButtonState == 0)
x11mousebuf[2] = X11MOUSE_OFFSET + X11MOUSE_BUTTON_REL;
else if (ip.Event.MouseEvent.dwButtonState & (FROM_LEFT_3RD_BUTTON_PRESSED | FROM_LEFT_4TH_BUTTON_PRESSED))
continue;
else
x11mousebuf[2] = X11MOUSE_OFFSET + X11MOUSE_BUTTON1 + ((int)ip.Event.MouseEvent.dwButtonState << 1);
break;
case MOUSE_WHEELED:
x11mousebuf[2] = X11MOUSE_OFFSET + (((int)ip.Event.MouseEvent.dwButtonState < 0) ? X11MOUSE_WHEEL_DOWN : X11MOUSE_WHEEL_UP);
break;
default:
continue;
}
x11mousePos = 0;
x11mouseCount = 5;
currentKey.ascii = ESC;
keyCount = 1;
return (TRUE);
}
} while (ip.EventType != KEY_EVENT ||
ip.Event.KeyEvent.bKeyDown != TRUE ||
(ip.Event.KeyEvent.wVirtualScanCode == 0 && ip.Event.KeyEvent.uChar.UnicodeChar == 0) ||
((ip.Event.KeyEvent.dwControlKeyState & (RIGHT_ALT_PRESSED|LEFT_CTRL_PRESSED)) == (RIGHT_ALT_PRESSED|LEFT_CTRL_PRESSED) && ip.Event.KeyEvent.uChar.UnicodeChar == 0) ||
ip.Event.KeyEvent.wVirtualKeyCode == VK_KANJI ||
ip.Event.KeyEvent.wVirtualKeyCode == VK_SHIFT ||
ip.Event.KeyEvent.wVirtualKeyCode == VK_CONTROL ||
ip.Event.KeyEvent.wVirtualKeyCode == VK_MENU);
currentKey.unicode = ip.Event.KeyEvent.uChar.UnicodeChar;
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;
}
} else if (ip.Event.KeyEvent.dwControlKeyState & SHIFT_PRESSED)
{
switch (currentKey.scan)
{
case PCK_SHIFT_TAB: /* tab */
currentKey.ascii = 0;
break;
}
}
return (TRUE);
}
/*
* Read a character from the keyboard.
*
* Known issues:
* - WIN32getch API should be int like libc (with unsigned char values or -1).
* - The unicode code below can return 0 - incorrectly indicating scan code.
* - UTF16-LE surrogate pairs don't work (and return 0).
* - If win32_kbhit returns true then WIN32getch should never block, but it
* will block till the next keypress if it's numlock/capslock scan code.
*/
public char WIN32getch(void)
{
char ascii;
static unsigned char utf8[UTF8_MAX_LENGTH];
static int utf8_size = 0;
static int utf8_next_byte = 0;
if (win_unget_pending)
{
win_unget_pending = FALSE;
return (char) win_unget_data;
}
// Return the rest of multibyte character from the prior call
if (utf8_next_byte < utf8_size)
{
ascii = utf8[utf8_next_byte++];
return ascii;
}
utf8_size = 0;
if (pending_scancode)
{
pending_scancode = 0;
return ((char)(currentKey.scan & 0x00FF));
}
do {
while (!win32_kbhit())
{
Sleep(20);
if (ABORT_SIGS())
return ('\003');
}
keyCount--;
// If multibyte character, return its first byte
if (currentKey.unicode > 0x7f)
{
utf8_size = WideCharToMultiByte(CP_UTF8, 0, &currentKey.unicode, 1, (LPSTR) &utf8, sizeof(utf8), NULL, NULL);
if (utf8_size == 0)
return '\0';
ascii = utf8[0];
utf8_next_byte = 1;
} else
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);
} while (pending_scancode &&
(currentKey.scan == PCK_CAPS_LOCK || currentKey.scan == PCK_NUM_LOCK));
return ascii;
}
/*
* Make the next call to WIN32getch return ch without changing the queue state.
*/
public void WIN32ungetch(int ch)
{
win_unget_pending = TRUE;
win_unget_data = ch;
}
#endif
#if MSDOS_COMPILER
/*
*/
public void WIN32setcolors(int fg, int bg)
{
SETCOLORS(fg, bg);
}
/*
*/
public void WIN32textout(char *text, int len)
{
#if MSDOS_COMPILER==WIN32C
DWORD written;
if (utf_mode == 2)
{
/*
* We've got UTF-8 text in a non-UTF-8 console. Convert it to
* wide and use WriteConsoleW.
*/
WCHAR wtext[1024];
len = MultiByteToWideChar(CP_UTF8, 0, text, len, wtext,
sizeof(wtext)/sizeof(*wtext));
WriteConsoleW(con_out, wtext, len, &written, NULL);
} else
WriteConsole(con_out, text, len, &written, NULL);
#else
char c = text[len];
text[len] = '\0';
cputs(text);
text[len] = c;
#endif
}
#endif
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