/**************************************************************************** * 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 1.73 2008/08/16 21:20:48 Werner.Fink 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); }