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/* $OpenBSD: lib_newterm.c,v 1.4 1998/01/17 16:27:34 millert Exp $ */
/***************************************************************************
* COPYRIGHT NOTICE *
****************************************************************************
* ncurses is copyright (C) 1992-1995 *
* Zeyd M. Ben-Halim *
* zmbenhal@netcom.com *
* Eric S. Raymond *
* esr@snark.thyrsus.com *
* *
* Permission is hereby granted to reproduce and distribute ncurses *
* by any means and for any fee, whether alone or as part of a *
* larger distribution, in source or in binary form, PROVIDED *
* this notice is included with any such distribution, and is not *
* removed from any of its header files. Mention of ncurses in any *
* applications linked with it is highly appreciated. *
* *
* ncurses comes AS IS with no warranty, implied or expressed. *
* *
***************************************************************************/
/*
** lib_newterm.c
**
** The newterm() function.
**
*/
#include <curses.priv.h>
#if defined(SVR4_TERMIO) && !defined(_POSIX_SOURCE)
#define _POSIX_SOURCE
#endif
#include <term.h> /* clear_screen, cup & friends, cur_term */
MODULE_ID("Id: lib_newterm.c,v 1.31 1997/12/28 00:36:51 tom 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 inline int _nc_initscr(void)
{
/* for extended XPG4 conformance requires cbreak() at this point */
/* (SVr4 curses does this anyway) */
cbreak();
#ifdef TERMIOS
cur_term->Nttyb.c_lflag &= ~(ECHO|ECHONL);
cur_term->Nttyb.c_iflag &= ~(ICRNL|INLCR|IGNCR);
cur_term->Nttyb.c_oflag &= ~(ONLCR);
#else
cur_term->Nttyb.sg_flags &= ~(ECHO|CRMOD);
#endif
return _nc_set_curterm(&cur_term->Nttyb);
}
/*
* 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.
*/
static int filter_mode = FALSE;
void filter(void)
{
filter_mode = TRUE;
}
SCREEN * newterm(const char *term, FILE *ofp, FILE *ifp)
{
int errret;
SCREEN* current;
#ifdef TRACE
char *t = getenv("NCURSES_TRACE");
if (t)
trace((unsigned) strtol(t, 0, 0));
#endif
T((T_CALLED("newterm(\"%s\",%p,%p)"), term, ofp, ifp));
/* this loads the capability entry, then sets LINES and COLS */
if (setupterm(term, fileno(ofp), &errret) == ERR)
return 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.
*/
if (exit_attribute_mode) {
#define SGR0_FIX(mode) if (mode != 0 && !strcmp(mode, exit_attribute_mode)) \
mode = 0
SGR0_FIX(exit_underline_mode);
SGR0_FIX(exit_standout_mode);
}
/* implement filter mode */
if (filter_mode) {
LINES = 1;
#ifdef init_tabs
if (init_tabs != -1)
TABSIZE = init_tabs;
else
#endif /* init_tabs */
TABSIZE = 8;
T(("TABSIZE = %d", TABSIZE));
#ifdef clear_screen
clear_screen = 0;
cursor_down = parm_down_cursor = 0;
cursor_address = 0;
cursor_up = parm_up_cursor = 0;
row_address = 0;
cursor_home = carriage_return;
#endif /* clear_screen */
}
/* If we must simulate soft labels, grab off the line to be used.
We assume that we must simulate, if it is none of the standard
formats (4-4 or 3-2-3) for which there may be some hardware
support. */
#ifdef num_labels
if (num_labels <= 0 || !SLK_STDFMT)
#endif /* num_labels */
if (_nc_slk_format)
{
if (ERR==_nc_ripoffline(-SLK_LINES, _nc_slk_initialize))
return 0;
}
/* this actually allocates the screen structure, and saves the
* original terminal settings.
*/
current = SP;
_nc_set_screen(0);
if (_nc_setupscreen(LINES, COLS, ofp) == ERR) {
_nc_set_screen(current);
return 0;
}
#ifdef num_labels
/* if the terminal type has real soft labels, set those up */
if (_nc_slk_format && num_labels > 0 && SLK_STDFMT)
_nc_slk_initialize(stdscr, COLS);
#endif /* num_labels */
SP->_ifd = fileno(ifp);
SP->_checkfd = 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 */
/* compute movement costs so we can do better move optimization */
_nc_mvcur_init();
_nc_signal_handler(TRUE);
/* initialize terminal to a sane state */
_nc_screen_init();
/* Initialize the terminal line settings. */
_nc_initscr();
T((T_RETURN("%p"), SP));
return(SP);
}
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