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/* $OpenBSD: lib_newterm.c,v 1.13 2010/01/12 23:22:06 nicm Exp $ */
/****************************************************************************
* Copyright (c) 1998-2007,2008 Free Software Foundation, Inc. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the *
* "Software"), to deal in the Software without restriction, including *
* without limitation the rights to use, copy, modify, merge, publish, *
* distribute, distribute with modifications, sublicense, and/or sell *
* copies of the Software, and to permit persons to whom the Software is *
* furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included *
* in all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
* *
* Except as contained in this notice, the name(s) of the above copyright *
* holders shall not be used in advertising or otherwise to promote the *
* sale, use or other dealings in this Software without prior written *
* authorization. *
****************************************************************************/
/****************************************************************************
* Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
* and: Eric S. Raymond <esr@snark.thyrsus.com> *
* and: Thomas E. Dickey 1996-on *
****************************************************************************/
/*
** lib_newterm.c
**
** The newterm() function.
**
*/
#include <curses.priv.h>
#if SVR4_TERMIO && !defined(_POSIX_SOURCE)
#define _POSIX_SOURCE
#endif
#include <term.h> /* clear_screen, cup & friends, cur_term */
#include <tic.h>
MODULE_ID("$Id: lib_newterm.c,v 1.13 2010/01/12 23:22:06 nicm Exp $")
#ifndef ONLCR /* Allows compilation under the QNX 4.2 OS */
#define ONLCR 0
#endif
/*
* SVr4/XSI Curses specify that hardware echo is turned off in initscr, and not
* restored during the curses session. The library simulates echo in software.
* (The behavior is unspecified if the application enables hardware echo).
*
* The newterm function also initializes terminal settings, and since initscr
* is supposed to behave as if it calls newterm, we do it here.
*/
static NCURSES_INLINE int
_nc_initscr(void)
{
int result = ERR;
/* for extended XPG4 conformance requires cbreak() at this point */
/* (SVr4 curses does this anyway) */
if (cbreak() == OK) {
TTY buf;
buf = cur_term->Nttyb;
#ifdef TERMIOS
buf.c_lflag &= ~(ECHO | ECHONL);
buf.c_iflag &= ~(ICRNL | INLCR | IGNCR);
buf.c_oflag &= ~(ONLCR);
#elif HAVE_SGTTY_H
buf.sg_flags &= ~(ECHO | CRMOD);
#else
memset(&buf, 0, sizeof(buf));
#endif
if ((result = _nc_set_tty_mode(&buf)) == OK)
cur_term->Nttyb = buf;
}
return result;
}
/*
* filter() has to be called before either initscr() or newterm(), so there is
* apparently no way to make this flag apply to some terminals and not others,
* aside from possibly delaying a filter() call until some terminals have been
* initialized.
*/
NCURSES_EXPORT(void)
filter(void)
{
START_TRACE();
T((T_CALLED("filter")));
_nc_prescreen.filter_mode = TRUE;
returnVoid;
}
#if NCURSES_EXT_FUNCS
/*
* An extension, allowing the application to open a new screen without
* requiring it to also be filtered.
*/
NCURSES_EXPORT(void)
nofilter(void)
{
START_TRACE();
T((T_CALLED("nofilter")));
_nc_prescreen.filter_mode = FALSE;
returnVoid;
}
#endif
NCURSES_EXPORT(SCREEN *)
newterm(NCURSES_CONST char *name, FILE *ofp, FILE *ifp)
{
int value;
int errret;
SCREEN *current;
SCREEN *result = 0;
TERMINAL *its_term;
START_TRACE();
T((T_CALLED("newterm(\"%s\",%p,%p)"), name, ofp, ifp));
_nc_init_pthreads();
_nc_lock_global(curses);
current = SP;
its_term = (SP ? SP->_term : 0);
/* this loads the capability entry, then sets LINES and COLS */
if (setupterm(name, fileno(ofp), &errret) != ERR) {
int slk_format = _nc_globals.slk_format;
/*
* This actually allocates the screen structure, and saves the original
* terminal settings.
*/
_nc_set_screen(0);
/* allow user to set maximum escape delay from the environment */
if ((value = _nc_getenv_num("ESCDELAY")) >= 0) {
set_escdelay(value);
}
if (_nc_setupscreen(LINES,
COLS,
ofp,
_nc_prescreen.filter_mode,
slk_format) == ERR) {
_nc_set_screen(current);
result = 0;
} else {
assert(SP != 0);
/*
* In setupterm() we did a set_curterm(), but it was before we set
* SP. So the "current" screen's terminal pointer was overwritten
* with a different terminal. Later, in _nc_setupscreen(), we set
* SP and the terminal pointer in the new screen.
*
* Restore the terminal-pointer for the pre-existing screen, if
* any.
*/
if (current)
current->_term = its_term;
/* if the terminal type has real soft labels, set those up */
if (slk_format && num_labels > 0 && SLK_STDFMT(slk_format))
_nc_slk_initialize(stdscr, COLS);
SP->_ifd = fileno(ifp);
typeahead(fileno(ifp));
#ifdef TERMIOS
SP->_use_meta = ((cur_term->Ottyb.c_cflag & CSIZE) == CS8 &&
!(cur_term->Ottyb.c_iflag & ISTRIP));
#else
SP->_use_meta = FALSE;
#endif
SP->_endwin = FALSE;
/*
* Check whether we can optimize scrolling under dumb terminals in
* case we do not have any of these capabilities, scrolling
* optimization will be useless.
*/
SP->_scrolling = ((scroll_forward && scroll_reverse) ||
((parm_rindex ||
parm_insert_line ||
insert_line) &&
(parm_index ||
parm_delete_line ||
delete_line)));
baudrate(); /* sets a field in the SP structure */
SP->_keytry = 0;
/*
* Check for mismatched graphic-rendition capabilities. Most SVr4
* terminfo trees contain entries that have rmul or rmso equated to
* sgr0 (Solaris curses copes with those entries). We do this only
* for curses, since many termcap applications assume that
* smso/rmso and smul/rmul are paired, and will not function
* properly if we remove rmso or rmul. Curses applications
* shouldn't be looking at this detail.
*/
#define SGR0_TEST(mode) (mode != 0) && (exit_attribute_mode == 0 || strcmp(mode, exit_attribute_mode))
SP->_use_rmso = SGR0_TEST(exit_standout_mode);
SP->_use_rmul = SGR0_TEST(exit_underline_mode);
/* compute movement costs so we can do better move optimization */
_nc_mvcur_init();
/* initialize terminal to a sane state */
_nc_screen_init();
/* Initialize the terminal line settings. */
_nc_initscr();
_nc_signal_handler(TRUE);
result = SP;
}
}
_nc_unlock_global(curses);
returnSP(result);
}
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