1 /* $OpenBSD: lib_newterm.c,v 1.12 2001/01/22 18:01:42 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 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 1.50 2000/12/10 02:43:27 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 NCURSES_EXPORT(void) 92 filter(void) 93 { 94 filter_mode = TRUE; 95 } 96 97 NCURSES_EXPORT(SCREEN *) 98 newterm 99 (NCURSES_CONST char *name, FILE * ofp, FILE * ifp) 100 { 101 int errret; 102 int slk_format = _nc_slk_format; 103 SCREEN *current; 104 #ifdef TRACE 105 int t = _nc_getenv_num("NCURSES_TRACE"); 106 107 if (t >= 0) 108 trace(t); 109 #endif 110 111 T((T_CALLED("newterm(\"%s\",%p,%p)"), name, ofp, ifp)); 112 113 /* this loads the capability entry, then sets LINES and COLS */ 114 if (setupterm(name, fileno(ofp), &errret) == ERR) 115 return 0; 116 117 /* implement filter mode */ 118 if (filter_mode) { 119 LINES = 1; 120 121 if (VALID_NUMERIC(init_tabs)) 122 TABSIZE = init_tabs; 123 else 124 TABSIZE = 8; 125 126 T(("TABSIZE = %d", TABSIZE)); 127 128 clear_screen = 0; 129 cursor_down = parm_down_cursor = 0; 130 cursor_address = 0; 131 cursor_up = parm_up_cursor = 0; 132 row_address = 0; 133 134 cursor_home = carriage_return; 135 } 136 137 /* If we must simulate soft labels, grab off the line to be used. 138 We assume that we must simulate, if it is none of the standard 139 formats (4-4 or 3-2-3) for which there may be some hardware 140 support. */ 141 if (num_labels <= 0 || !SLK_STDFMT(slk_format)) 142 if (slk_format) { 143 if (ERR == _nc_ripoffline(-SLK_LINES(slk_format), 144 _nc_slk_initialize)) 145 return 0; 146 } 147 /* this actually allocates the screen structure, and saves the 148 * original terminal settings. 149 */ 150 current = SP; 151 _nc_set_screen(0); 152 if (_nc_setupscreen(LINES, COLS, ofp) == ERR) { 153 _nc_set_screen(current); 154 return 0; 155 } 156 157 /* if the terminal type has real soft labels, set those up */ 158 if (slk_format && num_labels > 0 && SLK_STDFMT(slk_format)) 159 _nc_slk_initialize(stdscr, COLS); 160 161 SP->_ifd = fileno(ifp); 162 SP->_checkfd = fileno(ifp); 163 typeahead(fileno(ifp)); 164 #ifdef TERMIOS 165 SP->_use_meta = ((cur_term->Ottyb.c_cflag & CSIZE) == CS8 && 166 !(cur_term->Ottyb.c_iflag & ISTRIP)); 167 #else 168 SP->_use_meta = FALSE; 169 #endif 170 SP->_endwin = FALSE; 171 172 /* Check whether we can optimize scrolling under dumb terminals in case 173 * we do not have any of these capabilities, scrolling optimization 174 * will be useless. 175 */ 176 SP->_scrolling = ((scroll_forward && scroll_reverse) || 177 ((parm_rindex || parm_insert_line || insert_line) && 178 (parm_index || parm_delete_line || delete_line))); 179 180 baudrate(); /* sets a field in the SP structure */ 181 182 SP->_keytry = 0; 183 184 /* 185 * Check for mismatched graphic-rendition capabilities. Most SVr4 186 * terminfo trees contain entries that have rmul or rmso equated to 187 * sgr0 (Solaris curses copes with those entries). We do this only for 188 * curses, since many termcap applications assume that smso/rmso and 189 * smul/rmul are paired, and will not function properly if we remove 190 * rmso or rmul. Curses applications shouldn't be looking at this 191 * detail. 192 */ 193 #define SGR0_TEST(mode) (mode != 0) && (exit_attribute_mode == 0 || strcmp(mode, exit_attribute_mode)) 194 SP->_use_rmso = SGR0_TEST(exit_standout_mode); 195 SP->_use_rmul = SGR0_TEST(exit_underline_mode); 196 197 #if USE_WIDEC_SUPPORT 198 /* 199 * XFree86 xterm can be configured to support UTF-8 based on environment 200 * variable settings. 201 */ 202 { 203 char *s; 204 s = getenv("LC_ALL"); 205 if (s == NULL || *s == '\0') { 206 s = getenv("LC_CTYPE"); 207 if (s == NULL || *s == '\0') { 208 s = getenv("LANG"); 209 } 210 } 211 if (s != NULL && *s != '\0' && strstr(s, "UTF-8") != NULL) { 212 SP->_outch = _nc_utf8_outch; 213 } 214 } 215 #endif 216 217 /* compute movement costs so we can do better move optimization */ 218 _nc_mvcur_init(); 219 220 /* initialize terminal to a sane state */ 221 _nc_screen_init(); 222 223 /* Initialize the terminal line settings. */ 224 _nc_initscr(); 225 226 _nc_signal_handler(TRUE); 227 228 T((T_RETURN("%p"), SP)); 229 return (SP); 230 } 231