1 /****************************************************************************
2 * Copyright (c) 1998-2002,2004 Free Software Foundation, Inc. *
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5 * copy of this software and associated documentation files (the *
6 * "Software"), to deal in the Software without restriction, including *
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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 *
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18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
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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 ****************************************************************************/
38 ** The newterm() function.
42 #include <curses.priv.h>
44 #if SVR4_TERMIO && !defined(_POSIX_SOURCE)
48 #include <term.h> /* clear_screen, cup & friends, cur_term */
51 MODULE_ID("$Id: lib_newterm.c,v 1.58 2004/08/14 20:36:39 tom Exp $")
53 #ifndef ONLCR /* Allows compilation under the QNX 4.2 OS */
58 * SVr4/XSI Curses specify that hardware echo is turned off in initscr, and not
59 * restored during the curses session. The library simulates echo in software.
60 * (The behavior is unspecified if the application enables hardware echo).
62 * The newterm function also initializes terminal settings, and since initscr
63 * is supposed to behave as if it calls newterm, we do it here.
70 /* for extended XPG4 conformance requires cbreak() at this point */
71 /* (SVr4 curses does this anyway) */
75 buf = cur_term->Nttyb;
77 buf.c_lflag &= ~(ECHO | ECHONL);
78 buf.c_iflag &= ~(ICRNL | INLCR | IGNCR);
79 buf.c_oflag &= ~(ONLCR);
81 buf.sg_flags &= ~(ECHO | CRMOD);
83 if ((result = _nc_set_tty_mode(&buf)) == OK)
84 cur_term->Nttyb = buf;
90 * filter() has to be called before either initscr() or newterm(), so there is
91 * apparently no way to make this flag apply to some terminals and not others,
92 * aside from possibly delaying a filter() call until some terminals have been
95 static int filter_mode = FALSE;
100 T((T_CALLED("filter")));
105 NCURSES_EXPORT(SCREEN *)
106 newterm(NCURSES_CONST char *name, FILE *ofp, FILE *ifp)
109 int slk_format = _nc_slk_format;
113 T((T_CALLED("newterm(\"%s\",%p,%p)"), name, ofp, ifp));
115 /* this loads the capability entry, then sets LINES and COLS */
116 if (setupterm(name, fileno(ofp), &errret) == ERR)
119 /* implement filter mode */
124 cursor_down = parm_down_cursor = 0;
126 cursor_up = parm_up_cursor = 0;
129 cursor_home = carriage_return;
132 /* If we must simulate soft labels, grab off the line to be used.
133 We assume that we must simulate, if it is none of the standard
134 formats (4-4 or 3-2-3) for which there may be some hardware
136 if (num_labels <= 0 || !SLK_STDFMT(slk_format))
138 if (ERR == _nc_ripoffline(-SLK_LINES(slk_format),
142 /* this actually allocates the screen structure, and saves the
143 * original terminal settings.
147 if (_nc_setupscreen(LINES, COLS, ofp) == ERR) {
148 _nc_set_screen(current);
152 /* if the terminal type has real soft labels, set those up */
153 if (slk_format && num_labels > 0 && SLK_STDFMT(slk_format))
154 _nc_slk_initialize(stdscr, COLS);
156 SP->_ifd = fileno(ifp);
157 typeahead(fileno(ifp));
159 SP->_use_meta = ((cur_term->Ottyb.c_cflag & CSIZE) == CS8 &&
160 !(cur_term->Ottyb.c_iflag & ISTRIP));
162 SP->_use_meta = FALSE;
166 /* Check whether we can optimize scrolling under dumb terminals in case
167 * we do not have any of these capabilities, scrolling optimization
170 SP->_scrolling = ((scroll_forward && scroll_reverse) ||
171 ((parm_rindex || parm_insert_line || insert_line) &&
172 (parm_index || parm_delete_line || delete_line)));
174 baudrate(); /* sets a field in the SP structure */
179 * Check for mismatched graphic-rendition capabilities. Most SVr4
180 * terminfo trees contain entries that have rmul or rmso equated to
181 * sgr0 (Solaris curses copes with those entries). We do this only for
182 * curses, since many termcap applications assume that smso/rmso and
183 * smul/rmul are paired, and will not function properly if we remove
184 * rmso or rmul. Curses applications shouldn't be looking at this
187 #define SGR0_TEST(mode) (mode != 0) && (exit_attribute_mode == 0 || strcmp(mode, exit_attribute_mode))
188 SP->_use_rmso = SGR0_TEST(exit_standout_mode);
189 SP->_use_rmul = SGR0_TEST(exit_underline_mode);
191 /* compute movement costs so we can do better move optimization */
194 /* initialize terminal to a sane state */
197 /* Initialize the terminal line settings. */
200 _nc_signal_handler(TRUE);
204 * Pretend we received a SIGWINCH, just in case we're starting up in a
205 * terminal that cannot initialize its size properly (Debian #265631).
207 SP->_sig_winch = TRUE;