diff options
Diffstat (limited to 'usr.bin/vi/sex/sex_window.c')
| -rw-r--r-- | usr.bin/vi/sex/sex_window.c | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/usr.bin/vi/sex/sex_window.c b/usr.bin/vi/sex/sex_window.c new file mode 100644 index 0000000..37fc8ed --- /dev/null +++ b/usr.bin/vi/sex/sex_window.c @@ -0,0 +1,194 @@ +/*- + * 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 8.6 (Berkeley) 8/4/94"; +#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); +} |
