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/*-
* 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[] = "@(#)svi_curses.c 8.5 (Berkeley) 8/17/94";
#endif /* not lint */
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/time.h>
#include <bitstring.h>
#include <errno.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"
#include "svi_screen.h"
/*
* svi_curses_init --
* Initialize curses.
*/
int
svi_curses_init(sp)
SCR *sp;
{
struct termios t;
char *p;
#ifdef SYSV_CURSES
/*
* The SunOS/System V initscr() isn't reentrant. Don't even think
* about trying to use it. It fails in subtle ways (e.g. select(2)
* on fileno(stdin) stops working). We don't care about the SCREEN
* reference returned by newterm, we never have more than one SCREEN
* at a time.
*/
errno = 0;
if (newterm(O_STR(sp, O_TERM), stdout, stdin) == NULL) {
msgq(sp, errno ? M_SYSERR : M_ERR, "newterm failed");
return (1);
}
#else
/*
* Initscr() doesn't provide useful error values or messages. The
* reasonable guess is that either malloc failed or the terminal was
* unknown or lacking some essential feature. Try and guess so the
* user isn't even more pissed off because of the error message.
*/
errno = 0;
if (initscr() == NULL) {
char kbuf[2048];
msgq(sp, errno ? M_SYSERR : M_ERR, "initscr failed");
if ((p = getenv("TERM")) == NULL || !strcmp(p, "unknown"))
msgq(sp, M_ERR,
"No TERM environment variable set, or TERM set to \"unknown\"");
else if (tgetent(kbuf, p) != 1)
msgq(sp, M_ERR,
"%s: unknown terminal type, or terminal lacks necessary features", p);
else
msgq(sp, M_ERR,
"%s: terminal type lacks necessary features", p);
return (1);
}
#endif
/*
* We use raw mode. What we want is 8-bit clean, however, signals
* and flow control should continue to work. Admittedly, it sounds
* like cbreak, but it isn't. Using cbreak() can get you additional
* things like IEXTEN, which turns on things like DISCARD and LNEXT.
*
* !!!
* If raw isn't turning off echo and newlines, something's wrong.
* However, it doesn't hurt.
*/
noecho(); /* No character echo. */
nonl(); /* No CR/NL translation. */
raw(); /* 8-bit clean. */
idlok(stdscr, 1); /* Use hardware insert/delete line. */
/*
* XXX
* Historic implementations of curses handled SIGTSTP signals
* in one of three ways. They either:
*
* 1: Set their own handler, regardless.
* 2: Did not set a handler if a handler was already installed.
* 3: Set their own handler, but then called any previously set
* handler after completing their own cleanup.
*
* We don't try and figure out which behavior is in place, we
* just set it to SIG_DFL after initializing the curses interface.
*/
(void)signal(SIGTSTP, SIG_DFL);
/*
* If flow control was on, turn it back on. Turn signals on. ISIG
* turns on VINTR, VQUIT, VDSUSP and VSUSP. See signal.c:sig_init()
* for a discussion of what's going on here. To sum up, sig_init()
* already installed a handler for VINTR. We're going to disable the
* other three.
*
* XXX
* We want to use ^Y as a vi scrolling command. If the user has the
* DSUSP character set to ^Y (common practice) clean it up. As it's
* equally possible that the user has VDSUSP set to 'a', we disable
* it regardless. It doesn't make much sense to suspend vi at read,
* so I don't think anyone will care. Alternatively, we could look
* it up in the table of legal command characters and turn it off if
* it matches one. VDSUSP wasn't in POSIX 1003.1-1990, so we test for
* it.
*
* XXX
* We don't check to see if the user had signals enabled to start with.
* If they didn't, it's unclear what we're supposed to do here, but it
* is also pretty unlikely.
*/
if (!tcgetattr(STDIN_FILENO, &t)) {
if (sp->gp->original_termios.c_iflag & IXON)
t.c_iflag |= IXON;
if (sp->gp->original_termios.c_iflag & IXOFF)
t.c_iflag |= IXOFF;
t.c_lflag |= ISIG;
#ifdef VDSUSP
t.c_cc[VDSUSP] = _POSIX_VDISABLE;
#endif
t.c_cc[VQUIT] = _POSIX_VDISABLE;
t.c_cc[VSUSP] = _POSIX_VDISABLE;
(void)tcsetattr(STDIN_FILENO, TCSASOFT | TCSADRAIN, &t);
}
/* Put the cursor keys into application mode. */
svi_keypad(sp, 1);
/*
* The first screen in the list gets it all. All other screens
* are hidden and lose their maps.
*/
svi_dtoh(sp, "Window resize");
/* Initialize terminal values. */
SVP(sp)->srows = O_VAL(sp, O_LINES);
/*
* Initialize screen values.
*
* Small windows: see svi/svi_refresh.c:svi_refresh, section 3b.
*
* Setup:
* t_minrows is the minimum rows to display
* t_maxrows is the maximum rows to display (rows - 1)
* t_rows is the rows currently being displayed
*/
sp->rows = SVP(sp)->srows;
sp->cols = O_VAL(sp, O_COLUMNS);
sp->woff = 0;
sp->t_rows = sp->t_minrows = O_VAL(sp, O_WINDOW);
if (sp->t_rows > sp->rows - 1) {
sp->t_minrows = sp->t_rows = sp->rows - 1;
msgq(sp, M_INFO,
"Windows option value is too large, max is %u", sp->t_rows);
}
sp->t_maxrows = sp->rows - 1;
/* Create the screen map. */
CALLOC(sp, HMAP, SMAP *, SIZE_HMAP(sp), sizeof(SMAP));
if (HMAP == NULL) {
if (endwin() == ERR)
msgq(sp, M_SYSERR, "endwin");
return (1);
}
TMAP = HMAP + (sp->t_rows - 1);
F_SET(SVP(sp), SVI_CUR_INVALID); /* Cursor is invalid. */
F_SET(SVP(sp), SVI_CURSES_INIT); /* It's initialized. */
return (0);
}
/*
* svi_curses_end --
* Move to the bottom of the screen, end curses.
*/
int
svi_curses_end(sp)
SCR *sp;
{
/*
* XXX
* By the time we get here, the screen private area (SVI_PRIVATE)
* is probably gone. Don't use it, and don't call any routines
* that do.
*
* Restore the cursor keys to normal mode.
*/
svi_keypad(sp, 0);
/* Move to the bottom of the screen. */
if (move(INFOLINE(sp), 0) == OK) {
clrtoeol();
refresh();
}
/* End curses window. */
if (endwin() == ERR)
msgq(sp, M_SYSERR, "endwin");
return (0);
}
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