/* $OpenBSD: lib_newterm.c,v 1.6 1998/10/31 06:30:30 millert Exp $ */ /**************************************************************************** * Copyright (c) 1998 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 1992,1995 * * and: Eric S. Raymond * ****************************************************************************/ /* ** lib_newterm.c ** ** The newterm() function. ** */ #include #if defined(SVR4_TERMIO) && !defined(_POSIX_SOURCE) #define _POSIX_SOURCE #endif #include /* clear_screen, cup & friends, cur_term */ MODULE_ID("$From: lib_newterm.c,v 1.35 1998/09/19 21:43:22 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(NCURSES_CONST char *term, FILE *ofp, FILE *ifp) { int errret; SCREEN* current; #ifdef TRACE int t = _nc_getenv_num("NCURSES_TRACE"); if (t >= 0) trace(t); #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 */ SP->_keytry = 0; /* 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); }