1 /****************************************************************************
2 * Copyright (c) 1998-2008,2009 Free Software Foundation, Inc. *
4 * Permission is hereby granted, free of charge, to any person obtaining a *
5 * copy of this software and associated documentation files (the *
6 * "Software"), to deal in the Software without restriction, including *
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8 * distribute, distribute with modifications, sublicense, and/or sell *
9 * copies of the Software, and to permit persons to whom the Software is *
10 * furnished to do so, subject to the following conditions: *
12 * The above copyright notice and this permission notice shall be included *
13 * in all copies or substantial portions of the Software. *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
23 * Except as contained in this notice, the name(s) of the above copyright *
24 * holders shall not be used in advertising or otherwise to promote the *
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27 ****************************************************************************/
29 /****************************************************************************
30 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
31 * and: Eric S. Raymond <esr@snark.thyrsus.com> *
32 * and: Thomas E. Dickey 1996-on *
33 * and: Juergen Pfeifer 2009 *
34 ****************************************************************************/
39 ** The newterm() function.
43 #include <curses.priv.h>
45 #if SVR4_TERMIO && !defined(_POSIX_SOURCE)
50 #define CUR SP_TERMTYPE
53 #include <term.h> /* clear_screen, cup & friends, cur_term */
56 MODULE_ID("$Id: lib_newterm.c,v 1.77 2009/05/10 00:48:29 tom Exp $")
58 #ifndef ONLCR /* Allows compilation under the QNX 4.2 OS */
63 * SVr4/XSI Curses specify that hardware echo is turned off in initscr, and not
64 * restored during the curses session. The library simulates echo in software.
65 * (The behavior is unspecified if the application enables hardware echo).
67 * The newterm function also initializes terminal settings, and since initscr
68 * is supposed to behave as if it calls newterm, we do it here.
70 static NCURSES_INLINE int
75 /* for extended XPG4 conformance requires cbreak() at this point */
76 /* (SVr4 curses does this anyway) */
80 buf = cur_term->Nttyb;
82 buf.c_lflag &= ~(ECHO | ECHONL);
83 buf.c_iflag &= ~(ICRNL | INLCR | IGNCR);
84 buf.c_oflag &= ~(ONLCR);
86 buf.sg_flags &= ~(ECHO | CRMOD);
88 memset(&buf, 0, sizeof(buf));
90 if ((result = _nc_set_tty_mode(&buf)) == OK)
91 cur_term->Nttyb = buf;
97 * filter() has to be called before either initscr() or newterm(), so there is
98 * apparently no way to make this flag apply to some terminals and not others,
99 * aside from possibly delaying a filter() call until some terminals have been
103 NCURSES_SP_NAME(filter) (NCURSES_SP_DCL0)
106 T((T_CALLED("filter")));
107 _nc_prescreen.filter_mode = TRUE;
115 NCURSES_SP_NAME(filter) (CURRENT_SCREEN);
119 #if NCURSES_EXT_FUNCS
121 * An extension, allowing the application to open a new screen without
122 * requiring it to also be filtered.
125 NCURSES_SP_NAME(nofilter) (NCURSES_SP_DCL0)
128 T((T_CALLED("nofilter")));
129 _nc_prescreen.filter_mode = FALSE;
137 NCURSES_SP_NAME(nofilter) (CURRENT_SCREEN);
140 #endif /* NCURSES_EXT_FUNCS */
142 NCURSES_EXPORT(SCREEN *)
143 NCURSES_SP_NAME(newterm) (NCURSES_SP_DCLx
144 NCURSES_CONST char *name,
155 T((T_CALLED("newterm(\"%s\",%p,%p)"), name, ofp, ifp));
158 _nc_lock_global(curses);
161 its_term = (SP_PARM ? SP_PARM->_term : 0);
163 /* this loads the capability entry, then sets LINES and COLS */
164 if (setupterm(name, fileno(ofp), &errret) != ERR) {
165 int slk_format = _nc_globals.slk_format;
168 * This actually allocates the screen structure, and saves the original
173 /* allow user to set maximum escape delay from the environment */
174 if ((value = _nc_getenv_num("ESCDELAY")) >= 0) {
178 if (_nc_setupscreen(LINES,
181 _nc_prescreen.filter_mode,
182 slk_format) == ERR) {
183 _nc_set_screen(current);
186 assert(SP_PARM != 0);
188 * In setupterm() we did a set_curterm(), but it was before we set
189 * SP. So the "current" screen's terminal pointer was overwritten
190 * with a different terminal. Later, in _nc_setupscreen(), we set
191 * SP and the terminal pointer in the new screen.
193 * Restore the terminal-pointer for the pre-existing screen, if
197 current->_term = its_term;
199 /* if the terminal type has real soft labels, set those up */
200 if (slk_format && num_labels > 0 && SLK_STDFMT(slk_format))
201 _nc_slk_initialize(stdscr, COLS);
203 SP->_ifd = fileno(ifp);
204 typeahead(fileno(ifp));
206 SP->_use_meta = ((cur_term->Ottyb.c_cflag & CSIZE) == CS8 &&
207 !(cur_term->Ottyb.c_iflag & ISTRIP));
209 SP->_use_meta = FALSE;
214 * Check whether we can optimize scrolling under dumb terminals in
215 * case we do not have any of these capabilities, scrolling
216 * optimization will be useless.
218 SP->_scrolling = ((scroll_forward && scroll_reverse) ||
226 baudrate(); /* sets a field in the SP structure */
231 * Check for mismatched graphic-rendition capabilities. Most SVr4
232 * terminfo trees contain entries that have rmul or rmso equated to
233 * sgr0 (Solaris curses copes with those entries). We do this only
234 * for curses, since many termcap applications assume that
235 * smso/rmso and smul/rmul are paired, and will not function
236 * properly if we remove rmso or rmul. Curses applications
237 * shouldn't be looking at this detail.
239 #define SGR0_TEST(mode) (mode != 0) && (exit_attribute_mode == 0 || strcmp(mode, exit_attribute_mode))
240 SP->_use_rmso = SGR0_TEST(exit_standout_mode);
241 SP->_use_rmul = SGR0_TEST(exit_underline_mode);
243 /* compute movement costs so we can do better move optimization */
246 /* initialize terminal to a sane state */
249 /* Initialize the terminal line settings. */
252 _nc_signal_handler(TRUE);
257 _nc_unlock_global(curses);
262 NCURSES_EXPORT(SCREEN *)
263 newterm(NCURSES_CONST char *name, FILE *ofp, FILE *ifp)
265 return NCURSES_SP_NAME(newterm) (CURRENT_SCREEN, name, ofp, ifp);