588 lines
12 KiB
C
588 lines
12 KiB
C
/*
|
|
* Copyright (c) 1988 Mark Nudleman
|
|
* Copyright (c) 1988, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef lint
|
|
static char sccsid[] = "@(#)screen.c 8.2 (Berkeley) 4/20/94";
|
|
#endif /* not lint */
|
|
|
|
/*
|
|
* Routines which deal with the characteristics of the terminal.
|
|
* Uses termcap to be as terminal-independent as possible.
|
|
*
|
|
* {{ Someday this should be rewritten to use curses. }}
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <less.h>
|
|
|
|
#define TERMIOS 1
|
|
|
|
#if TERMIO
|
|
#include <termio.h>
|
|
#else
|
|
#if TERMIOS
|
|
#include <termios.h>
|
|
#define TAB3 0
|
|
#include <sys/ioctl.h>
|
|
#else
|
|
#include <sgtty.h>
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef TIOCGWINSZ
|
|
#include <sys/ioctl.h>
|
|
#else
|
|
/*
|
|
* For the Unix PC (ATT 7300 & 3B1):
|
|
* Since WIOCGETD is defined in sys/window.h, we can't use that to decide
|
|
* whether to include sys/window.h. Use SIGPHONE from sys/signal.h instead.
|
|
*/
|
|
#include <sys/signal.h>
|
|
#ifdef SIGPHONE
|
|
#include <sys/window.h>
|
|
#endif
|
|
#endif
|
|
|
|
/*
|
|
* 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_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_backspace, /* Backspace cursor */
|
|
*sc_init, /* Startup terminal initialization */
|
|
*sc_deinit; /* Exit terminal de-intialization */
|
|
|
|
int auto_wrap; /* Terminal does \r\n when write past margin */
|
|
int ignaw; /* Terminal ignores \n immediately after wrap */
|
|
/* The user's erase and line-kill chars */
|
|
int retain_below; /* Terminal retains text below the screen */
|
|
int erase_char, kill_char, werase_char;
|
|
int sc_width, sc_height = -1; /* Height & width of screen */
|
|
int sc_window = -1; /* window size for forward and backward */
|
|
int bo_width, be_width; /* Printing width of boldface sequences */
|
|
int ul_width, ue_width; /* Printing width of underline sequences */
|
|
int so_width, se_width; /* Printing width of standout sequences */
|
|
|
|
/*
|
|
* These two variables are sometimes defined in,
|
|
* and needed by, the termcap library.
|
|
* It may be necessary on some systems to declare them extern here.
|
|
*/
|
|
/*extern*/ short ospeed; /* Terminal output baud rate */
|
|
/*extern*/ char PC; /* Pad character */
|
|
|
|
extern int back_scroll;
|
|
char *tgetstr();
|
|
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.
|
|
*/
|
|
raw_mode(on)
|
|
int on;
|
|
{
|
|
#if TERMIO || TERMIOS
|
|
|
|
#if TERMIO
|
|
struct termio s;
|
|
static struct termio save_term;
|
|
#else
|
|
struct termios s;
|
|
static struct termios save_term;
|
|
#endif
|
|
|
|
if (on)
|
|
{
|
|
/*
|
|
* Get terminal modes.
|
|
*/
|
|
#if TERMIO
|
|
(void)ioctl(2, TCGETA, &s);
|
|
#else
|
|
tcgetattr(2, &s);
|
|
#endif
|
|
|
|
/*
|
|
* Save modes and set certain variables dependent on modes.
|
|
*/
|
|
save_term = s;
|
|
#if TERMIO
|
|
ospeed = s.c_cflag & CBAUD;
|
|
#else
|
|
ospeed = cfgetospeed(&s);
|
|
#endif
|
|
erase_char = s.c_cc[VERASE];
|
|
kill_char = s.c_cc[VKILL];
|
|
werase_char = s.c_cc[VWERASE];
|
|
|
|
/*
|
|
* Set the modes to the way we want them.
|
|
*/
|
|
s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL);
|
|
s.c_oflag |= (OPOST|ONLCR|TAB3);
|
|
#if TERMIO
|
|
s.c_oflag &= ~(OCRNL|ONOCR|ONLRET);
|
|
#endif
|
|
s.c_cc[VMIN] = 1;
|
|
s.c_cc[VTIME] = 0;
|
|
} else
|
|
{
|
|
/*
|
|
* Restore saved modes.
|
|
*/
|
|
s = save_term;
|
|
}
|
|
#if TERMIO
|
|
(void)ioctl(2, TCSETAW, &s);
|
|
#else
|
|
tcsetattr(2, TCSADRAIN, &s);
|
|
#endif
|
|
#else
|
|
struct sgttyb s;
|
|
struct ltchars l;
|
|
static struct sgttyb save_term;
|
|
|
|
if (on)
|
|
{
|
|
/*
|
|
* Get terminal modes.
|
|
*/
|
|
(void)ioctl(2, TIOCGETP, &s);
|
|
(void)ioctl(2, TIOCGLTC, &l);
|
|
|
|
/*
|
|
* Save modes and set certain variables dependent on modes.
|
|
*/
|
|
save_term = s;
|
|
ospeed = s.sg_ospeed;
|
|
erase_char = s.sg_erase;
|
|
kill_char = s.sg_kill;
|
|
werase_char = l.t_werasc;
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
(void)ioctl(2, TIOCSETN, &s);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Get terminal capabilities via termcap.
|
|
*/
|
|
get_term()
|
|
{
|
|
char termbuf[2048];
|
|
char *sp;
|
|
char *term;
|
|
int hard;
|
|
#ifdef TIOCGWINSZ
|
|
struct winsize w;
|
|
#else
|
|
#ifdef WIOCGETD
|
|
struct uwdata w;
|
|
#endif
|
|
#endif
|
|
static char sbuf[1024];
|
|
|
|
char *getenv(), *strcpy();
|
|
|
|
/*
|
|
* Find out what kind of terminal this is.
|
|
*/
|
|
if ((term = getenv("TERM")) == NULL)
|
|
term = "unknown";
|
|
if (tgetent(termbuf, term) <= 0)
|
|
(void)strcpy(termbuf, "dumb:co#80:hc:");
|
|
|
|
/*
|
|
* Get size of the screen.
|
|
*/
|
|
#ifdef TIOCGWINSZ
|
|
if (ioctl(2, TIOCGWINSZ, &w) == 0 && w.ws_row > 0)
|
|
sc_height = w.ws_row;
|
|
#else
|
|
#ifdef WIOCGETD
|
|
if (ioctl(2, WIOCGETD, &w) == 0 && w.uw_height > 0)
|
|
sc_height = w.uw_height/w.uw_vs;
|
|
#endif
|
|
#endif
|
|
else
|
|
sc_height = tgetnum("li");
|
|
hard = (sc_height < 0 || tgetflag("hc"));
|
|
if (hard) {
|
|
/* Oh no, this is a hardcopy terminal. */
|
|
sc_height = 24;
|
|
}
|
|
|
|
#ifdef TIOCGWINSZ
|
|
if (ioctl(2, TIOCGWINSZ, &w) == 0 && w.ws_col > 0)
|
|
sc_width = w.ws_col;
|
|
else
|
|
#ifdef WIOCGETD
|
|
if (ioctl(2, WIOCGETD, &w) == 0 && w.uw_width > 0)
|
|
sc_width = w.uw_width/w.uw_hs;
|
|
else
|
|
#endif
|
|
#endif
|
|
sc_width = tgetnum("co");
|
|
if (sc_width < 0)
|
|
sc_width = 80;
|
|
|
|
auto_wrap = tgetflag("am");
|
|
ignaw = tgetflag("xn");
|
|
retain_below = tgetflag("db");
|
|
|
|
/*
|
|
* 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_width = tgetnum("sg")) < 0)
|
|
so_width = 0;
|
|
be_width = bo_width = ue_width = ul_width = se_width = so_width;
|
|
|
|
/*
|
|
* Get various string-valued capabilities.
|
|
*/
|
|
sp = sbuf;
|
|
|
|
sc_pad = tgetstr("pc", &sp);
|
|
if (sc_pad != NULL)
|
|
PC = *sc_pad;
|
|
|
|
sc_init = tgetstr("ti", &sp);
|
|
if (sc_init == NULL)
|
|
sc_init = "";
|
|
|
|
sc_deinit= tgetstr("te", &sp);
|
|
if (sc_deinit == NULL)
|
|
sc_deinit = "";
|
|
|
|
sc_eol_clear = tgetstr("ce", &sp);
|
|
if (hard || sc_eol_clear == NULL || *sc_eol_clear == '\0')
|
|
{
|
|
sc_eol_clear = "";
|
|
}
|
|
|
|
sc_clear = tgetstr("cl", &sp);
|
|
if (hard || sc_clear == NULL || *sc_clear == '\0')
|
|
{
|
|
sc_clear = "\n\n";
|
|
}
|
|
|
|
sc_move = tgetstr("cm", &sp);
|
|
if (hard || 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 = "";
|
|
}
|
|
|
|
sc_s_in = tgetstr("so", &sp);
|
|
if (hard || sc_s_in == NULL)
|
|
sc_s_in = "";
|
|
|
|
sc_s_out = tgetstr("se", &sp);
|
|
if (hard || sc_s_out == NULL)
|
|
sc_s_out = "";
|
|
|
|
sc_u_in = tgetstr("us", &sp);
|
|
if (hard || sc_u_in == NULL)
|
|
sc_u_in = sc_s_in;
|
|
|
|
sc_u_out = tgetstr("ue", &sp);
|
|
if (hard || sc_u_out == NULL)
|
|
sc_u_out = sc_s_out;
|
|
|
|
sc_b_in = tgetstr("md", &sp);
|
|
if (hard || sc_b_in == NULL)
|
|
{
|
|
sc_b_in = sc_s_in;
|
|
sc_b_out = sc_s_out;
|
|
} else
|
|
{
|
|
sc_b_out = tgetstr("me", &sp);
|
|
if (hard || sc_b_out == NULL)
|
|
sc_b_out = "";
|
|
}
|
|
|
|
sc_home = tgetstr("ho", &sp);
|
|
if (hard || sc_home == NULL || *sc_home == '\0')
|
|
{
|
|
if (*sc_move == '\0')
|
|
{
|
|
/*
|
|
* This last resort for sc_home is supposed to
|
|
* be an up-arrow suggesting moving to the
|
|
* top of the "virtual screen". (The one in
|
|
* your imagination as you try to use this on
|
|
* a hard copy terminal.)
|
|
*/
|
|
sc_home = "|\b^";
|
|
} else
|
|
{
|
|
/*
|
|
* No "home" string,
|
|
* but we can use "move(0,0)".
|
|
*/
|
|
(void)strcpy(sp, tgoto(sc_move, 0, 0));
|
|
sc_home = sp;
|
|
sp += strlen(sp) + 1;
|
|
}
|
|
}
|
|
|
|
sc_lower_left = tgetstr("ll", &sp);
|
|
if (hard || sc_lower_left == NULL || *sc_lower_left == '\0')
|
|
{
|
|
if (*sc_move == '\0')
|
|
{
|
|
sc_lower_left = "\r";
|
|
} else
|
|
{
|
|
/*
|
|
* No "lower-left" string,
|
|
* but we can use "move(0,last-line)".
|
|
*/
|
|
(void)strcpy(sp, tgoto(sc_move, 0, sc_height-1));
|
|
sc_lower_left = sp;
|
|
sp += strlen(sp) + 1;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* To add a line at top of screen and scroll the display down,
|
|
* we use "al" (add line) or "sr" (scroll reverse).
|
|
*/
|
|
if ((sc_addline = tgetstr("al", &sp)) == NULL ||
|
|
*sc_addline == '\0')
|
|
sc_addline = tgetstr("sr", &sp);
|
|
|
|
if (hard || sc_addline == NULL || *sc_addline == '\0')
|
|
{
|
|
sc_addline = "";
|
|
/* Force repaint on any backward movement */
|
|
back_scroll = 0;
|
|
}
|
|
|
|
if (tgetflag("bs"))
|
|
sc_backspace = "\b";
|
|
else
|
|
{
|
|
sc_backspace = tgetstr("bc", &sp);
|
|
if (sc_backspace == NULL || *sc_backspace == '\0')
|
|
sc_backspace = "\b";
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Below are the functions which perform all the
|
|
* terminal-specific screen manipulation.
|
|
*/
|
|
|
|
int putchr();
|
|
|
|
/*
|
|
* Initialize terminal
|
|
*/
|
|
init()
|
|
{
|
|
tputs(sc_init, sc_height, putchr);
|
|
}
|
|
|
|
/*
|
|
* Deinitialize terminal
|
|
*/
|
|
deinit()
|
|
{
|
|
tputs(sc_deinit, sc_height, putchr);
|
|
}
|
|
|
|
/*
|
|
* Home cursor (move to upper left corner of screen).
|
|
*/
|
|
home()
|
|
{
|
|
tputs(sc_home, 1, putchr);
|
|
}
|
|
|
|
/*
|
|
* Add a blank line (called with cursor at home).
|
|
* Should scroll the display down.
|
|
*/
|
|
add_line()
|
|
{
|
|
tputs(sc_addline, sc_height, putchr);
|
|
}
|
|
|
|
int short_file; /* if file less than a screen */
|
|
lower_left()
|
|
{
|
|
if (short_file) {
|
|
putchr('\r');
|
|
flush();
|
|
}
|
|
else
|
|
tputs(sc_lower_left, 1, putchr);
|
|
}
|
|
|
|
/*
|
|
* Ring the terminal bell.
|
|
*/
|
|
bell()
|
|
{
|
|
putchr('\7');
|
|
}
|
|
|
|
/*
|
|
* Clear the screen.
|
|
*/
|
|
clear()
|
|
{
|
|
tputs(sc_clear, sc_height, putchr);
|
|
}
|
|
|
|
/*
|
|
* Clear from the cursor to the end of the cursor's line.
|
|
* {{ This must not move the cursor. }}
|
|
*/
|
|
clear_eol()
|
|
{
|
|
tputs(sc_eol_clear, 1, putchr);
|
|
}
|
|
|
|
/*
|
|
* Begin "standout" (bold, underline, or whatever).
|
|
*/
|
|
so_enter()
|
|
{
|
|
tputs(sc_s_in, 1, putchr);
|
|
}
|
|
|
|
/*
|
|
* End "standout".
|
|
*/
|
|
so_exit()
|
|
{
|
|
tputs(sc_s_out, 1, putchr);
|
|
}
|
|
|
|
/*
|
|
* Begin "underline" (hopefully real underlining,
|
|
* otherwise whatever the terminal provides).
|
|
*/
|
|
ul_enter()
|
|
{
|
|
tputs(sc_u_in, 1, putchr);
|
|
}
|
|
|
|
/*
|
|
* End "underline".
|
|
*/
|
|
ul_exit()
|
|
{
|
|
tputs(sc_u_out, 1, putchr);
|
|
}
|
|
|
|
/*
|
|
* Begin "bold"
|
|
*/
|
|
bo_enter()
|
|
{
|
|
tputs(sc_b_in, 1, putchr);
|
|
}
|
|
|
|
/*
|
|
* End "bold".
|
|
*/
|
|
bo_exit()
|
|
{
|
|
tputs(sc_b_out, 1, putchr);
|
|
}
|
|
|
|
/*
|
|
* Erase the character to the left of the cursor
|
|
* and move the cursor left.
|
|
*/
|
|
backspace()
|
|
{
|
|
/*
|
|
* Try to erase the previous character by overstriking with a space.
|
|
*/
|
|
tputs(sc_backspace, 1, putchr);
|
|
putchr(' ');
|
|
tputs(sc_backspace, 1, putchr);
|
|
}
|
|
|
|
/*
|
|
* Output a plain backspace, without erasing the previous char.
|
|
*/
|
|
putbs()
|
|
{
|
|
tputs(sc_backspace, 1, putchr);
|
|
}
|