1 /* $OpenBSD: lib_newterm.c,v 1.8 2000/06/19 03:53:43 millert Exp $ */ 2 3 /**************************************************************************** 4 * Copyright (c) 1998,1999,2000 Free Software Foundation, Inc. * 5 * * 6 * Permission is hereby granted, free of charge, to any person obtaining a * 7 * copy of this software and associated documentation files (the * 8 * "Software"), to deal in the Software without restriction, including * 9 * without limitation the rights to use, copy, modify, merge, publish, * 10 * distribute, distribute with modifications, sublicense, and/or sell * 11 * copies of the Software, and to permit persons to whom the Software is * 12 * furnished to do so, subject to the following conditions: * 13 * * 14 * The above copyright notice and this permission notice shall be included * 15 * in all copies or substantial portions of the Software. * 16 * * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 20 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 21 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 22 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 23 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 24 * * 25 * Except as contained in this notice, the name(s) of the above copyright * 26 * holders shall not be used in advertising or otherwise to promote the * 27 * sale, use or other dealings in this Software without prior written * 28 * authorization. * 29 ****************************************************************************/ 30 31 /**************************************************************************** 32 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 * 33 * and: Eric S. Raymond <esr@snark.thyrsus.com> * 34 ****************************************************************************/ 35 36 /* 37 ** lib_newterm.c 38 ** 39 ** The newterm() function. 40 ** 41 */ 42 43 #include <curses.priv.h> 44 45 #if defined(SVR4_TERMIO) && !defined(_POSIX_SOURCE) 46 #define _POSIX_SOURCE 47 #endif 48 49 #include <term.h> /* clear_screen, cup & friends, cur_term */ 50 #include <tic.h> 51 52 MODULE_ID("$From: lib_newterm.c,v 1.45 2000/05/20 23:45:57 tom Exp $"); 53 54 #ifndef ONLCR /* Allows compilation under the QNX 4.2 OS */ 55 #define ONLCR 0 56 #endif 57 58 /* 59 * SVr4/XSI Curses specify that hardware echo is turned off in initscr, and not 60 * restored during the curses session. The library simulates echo in software. 61 * (The behavior is unspecified if the application enables hardware echo). 62 * 63 * The newterm function also initializes terminal settings, and since initscr 64 * is supposed to behave as if it calls newterm, we do it here. 65 */ 66 static inline int 67 _nc_initscr(void) 68 { 69 /* for extended XPG4 conformance requires cbreak() at this point */ 70 /* (SVr4 curses does this anyway) */ 71 cbreak(); 72 73 #ifdef TERMIOS 74 cur_term->Nttyb.c_lflag &= ~(ECHO | ECHONL); 75 cur_term->Nttyb.c_iflag &= ~(ICRNL | INLCR | IGNCR); 76 cur_term->Nttyb.c_oflag &= ~(ONLCR); 77 #else 78 cur_term->Nttyb.sg_flags &= ~(ECHO | CRMOD); 79 #endif 80 return _nc_set_tty_mode(&cur_term->Nttyb); 81 } 82 83 /* 84 * filter() has to be called before either initscr() or newterm(), so there is 85 * apparently no way to make this flag apply to some terminals and not others, 86 * aside from possibly delaying a filter() call until some terminals have been 87 * initialized. 88 */ 89 static int filter_mode = FALSE; 90 91 void 92 filter(void) 93 { 94 filter_mode = TRUE; 95 } 96 97 SCREEN * 98 newterm(NCURSES_CONST char *name, FILE * ofp, FILE * ifp) 99 { 100 int errret; 101 int slk_format = _nc_slk_format; 102 SCREEN *current; 103 #ifdef TRACE 104 int t = _nc_getenv_num("NCURSES_TRACE"); 105 106 if (t >= 0) 107 trace(t); 108 #endif 109 110 T((T_CALLED("newterm(\"%s\",%p,%p)"), name, ofp, ifp)); 111 112 /* this loads the capability entry, then sets LINES and COLS */ 113 if (setupterm(name, fileno(ofp), &errret) == ERR) 114 return 0; 115 116 /* implement filter mode */ 117 if (filter_mode) { 118 LINES = 1; 119 120 if (VALID_NUMERIC(init_tabs)) 121 TABSIZE = init_tabs; 122 else 123 TABSIZE = 8; 124 125 T(("TABSIZE = %d", TABSIZE)); 126 127 clear_screen = 0; 128 cursor_down = parm_down_cursor = 0; 129 cursor_address = 0; 130 cursor_up = parm_up_cursor = 0; 131 row_address = 0; 132 133 cursor_home = carriage_return; 134 } 135 136 /* If we must simulate soft labels, grab off the line to be used. 137 We assume that we must simulate, if it is none of the standard 138 formats (4-4 or 3-2-3) for which there may be some hardware 139 support. */ 140 if (num_labels <= 0 || !SLK_STDFMT(slk_format)) 141 if (slk_format) { 142 if (ERR == _nc_ripoffline(-SLK_LINES(slk_format), 143 _nc_slk_initialize)) 144 return 0; 145 } 146 /* this actually allocates the screen structure, and saves the 147 * original terminal settings. 148 */ 149 current = SP; 150 _nc_set_screen(0); 151 if (_nc_setupscreen(LINES, COLS, ofp) == ERR) { 152 _nc_set_screen(current); 153 return 0; 154 } 155 156 /* if the terminal type has real soft labels, set those up */ 157 if (slk_format && num_labels > 0 && SLK_STDFMT(slk_format)) 158 _nc_slk_initialize(stdscr, COLS); 159 160 SP->_ifd = fileno(ifp); 161 SP->_checkfd = fileno(ifp); 162 typeahead(fileno(ifp)); 163 #ifdef TERMIOS 164 SP->_use_meta = ((cur_term->Ottyb.c_cflag & CSIZE) == CS8 && 165 !(cur_term->Ottyb.c_iflag & ISTRIP)); 166 #else 167 SP->_use_meta = FALSE; 168 #endif 169 SP->_endwin = FALSE; 170 171 /* Check whether we can optimize scrolling under dumb terminals in case 172 * we do not have any of these capabilities, scrolling optimization 173 * will be useless. 174 */ 175 SP->_scrolling = ((scroll_forward && scroll_reverse) || 176 ((parm_rindex || parm_insert_line || insert_line) && 177 (parm_index || parm_delete_line || delete_line))); 178 179 baudrate(); /* sets a field in the SP structure */ 180 181 SP->_keytry = 0; 182 183 /* 184 * Check for mismatched graphic-rendition capabilities. Most SVr4 185 * terminfo trees contain entries that have rmul or rmso equated to 186 * sgr0 (Solaris curses copes with those entries). We do this only for 187 * curses, since many termcap applications assume that smso/rmso and 188 * smul/rmul are paired, and will not function properly if we remove 189 * rmso or rmul. Curses applications shouldn't be looking at this 190 * detail. 191 */ 192 #define SGR0_TEST(mode) (mode != 0) && (exit_attribute_mode == 0 || strcmp(mode, exit_attribute_mode)) 193 SP->_use_rmso = SGR0_TEST(exit_standout_mode); 194 SP->_use_rmul = SGR0_TEST(exit_underline_mode); 195 196 #ifdef USE_WIDEC_SUPPORT 197 /* 198 * XFree86 xterm can be configured to support UTF-8 based on environment 199 * variable settings. 200 */ 201 { 202 char *s; 203 if (((s = getenv("LC_ALL")) != 0 204 || (s = getenv("LC_CTYPE")) != 0 205 || (s = getenv("LANG")) != 0) 206 && strstr(s, "UTF-8") != 0) { 207 SP->_outch = _nc_utf8_outch; 208 } 209 } 210 #endif 211 212 /* compute movement costs so we can do better move optimization */ 213 _nc_mvcur_init(); 214 215 /* initialize terminal to a sane state */ 216 _nc_screen_init(); 217 218 /* Initialize the terminal line settings. */ 219 _nc_initscr(); 220 221 _nc_signal_handler(TRUE); 222 223 T((T_RETURN("%p"), SP)); 224 return (SP); 225 } 226