NetBSD/usr.bin/vi/sex/sex_window.c

195 lines
5.4 KiB
C

/*-
* Copyright (c) 1993, 1994
* 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[] = "@(#)sex_window.c 8.8 (Berkeley) 8/17/94";
#endif /* not lint */
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/queue.h>
#include <sys/time.h>
#include <bitstring.h>
#include <limits.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
#include "compat.h"
#include <curses.h>
#include <db.h>
#include <regex.h>
#include "vi.h"
/*
* sex_window --
* Set the window size.
*/
int
sex_window(sp, sigwinch)
SCR *sp;
int sigwinch;
{
struct winsize win;
size_t col, row;
int rval, user_set;
ARGS *argv[2], a, b;
char *s, buf[2048];
/*
* Get the screen rows and columns. If the values are wrong, it's
* not a big deal -- as soon as the user sets them explicitly the
* environment will be set and the screen package will use the new
* values.
*
* Try TIOCGWINSZ.
*/
row = col = 0;
#ifdef TIOCGWINSZ
if (ioctl(STDERR_FILENO, TIOCGWINSZ, &win) != -1) {
row = win.ws_row;
col = win.ws_col;
}
#endif
/* If here because of a signal, TIOCGWINSZ is all we trust. */
if (sigwinch) {
if (row == 0 || col == 0) {
msgq(sp, M_SYSERR, "TIOCGWINSZ");
return (1);
}
/*
* !!!
* SunOS systems deliver SIGWINCH when windows are uncovered
* as well as when they change size. In addition, we call
* here when continuing after being suspended since the window
* may have changed size. Since we don't want to background
* all of the screens just because the window was uncovered,
* ignore the signal if there's no change.
*/
if (row == O_VAL(sp, O_LINES) && col == O_VAL(sp, O_COLUMNS))
return (1);
goto sigw;
}
/*
* !!!
* If TIOCGWINSZ failed, or had entries of 0, try termcap. This
* routine is called before any termcap or terminal information
* has been set up. If there's no TERM environmental variable set,
* let it go, at least ex can run.
*/
if (row == 0 || col == 0) {
if ((s = getenv("TERM")) == NULL)
goto noterm;
#ifdef SYSV_CURSES
if (row == 0)
if ((rval = tigetnum("lines")) < 0)
msgq(sp, M_SYSERR, "tigetnum: lines");
else
row = rval;
if (col == 0)
if ((rval = tigetnum("cols")) < 0)
msgq(sp, M_SYSERR, "tigetnum: cols");
else
col = rval;
#else
switch (tgetent(buf, s)) {
case -1:
msgq(sp, M_SYSERR, "tgetent: %s", s);
return (1);
case 0:
msgq(sp, M_ERR, "%s: unknown terminal type", s);
return (1);
}
if (row == 0)
if ((rval = tgetnum("li")) < 0)
msgq(sp, M_ERR,
"no \"li\" capability for %s", s);
else
row = rval;
if (col == 0)
if ((rval = tgetnum("co")) < 0)
msgq(sp, M_ERR,
"no \"co\" capability for %s", s);
else
col = rval;
#endif
}
/* If nothing else, well, it's probably a VT100. */
noterm: if (row == 0)
row = 24;
if (col == 0)
col = 80;
/* POSIX 1003.2 requires the environment to override. */
if ((s = getenv("LINES")) != NULL)
row = strtol(s, NULL, 10);
if ((s = getenv("COLUMNS")) != NULL)
col = strtol(s, NULL, 10);
sigw: a.bp = buf;
b.bp = NULL;
b.len = 0;
argv[0] = &a;
argv[1] = &b;;
/*
* Tell the options code that the screen size has changed.
* Since the user didn't do the set, clear the set bits.
*/
user_set = F_ISSET(&sp->opts[O_LINES], OPT_SET);
a.len = snprintf(buf, sizeof(buf), "lines=%u", row);
if (opts_set(sp, NULL, argv))
return (1);
if (user_set)
F_CLR(&sp->opts[O_LINES], OPT_SET);
user_set = F_ISSET(&sp->opts[O_COLUMNS], OPT_SET);
a.len = snprintf(buf, sizeof(buf), "columns=%u", col);
if (opts_set(sp, NULL, argv))
return (1);
if (user_set)
F_CLR(&sp->opts[O_COLUMNS], OPT_SET);
F_SET(sp, S_RESIZE);
return (0);
}