1 /**************************************************************************** 2 * Copyright (c) 1998-2009,2010 Free Software Foundation, Inc. * 3 * * 4 * Permission is hereby granted, free of charge, to any person obtaining a * 5 * copy of this software and associated documentation files (the * 6 * "Software"), to deal in the Software without restriction, including * 7 * without limitation the rights to use, copy, modify, merge, publish, * 8 * distribute, distribute with modifications, sublicense, and/or sell * 9 * copies of the Software, and to permit persons to whom the Software is * 10 * furnished to do so, subject to the following conditions: * 11 * * 12 * The above copyright notice and this permission notice shall be included * 13 * in all copies or substantial portions of the Software. * 14 * * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 22 * * 23 * Except as contained in this notice, the name(s) of the above copyright * 24 * holders shall not be used in advertising or otherwise to promote the * 25 * sale, use or other dealings in this Software without prior written * 26 * authorization. * 27 ****************************************************************************/ 28 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 * and: Juergen Pfeifer 2009 * 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 #ifndef CUR 50 #define CUR SP_TERMTYPE 51 #endif 52 53 #include <tic.h> 54 55 MODULE_ID("$Id: lib_newterm.c,v 1.86 2010/05/20 23:25:18 tom Exp $") 56 57 #ifdef USE_TERM_DRIVER 58 #define NumLabels InfoOf(SP_PARM).numlabels 59 #else 60 #define NumLabels num_labels 61 #endif 62 63 #ifndef ONLCR /* Allows compilation under the QNX 4.2 OS */ 64 #define ONLCR 0 65 #endif 66 67 /* 68 * SVr4/XSI Curses specify that hardware echo is turned off in initscr, and not 69 * restored during the curses session. The library simulates echo in software. 70 * (The behavior is unspecified if the application enables hardware echo). 71 * 72 * The newterm function also initializes terminal settings, and since initscr 73 * is supposed to behave as if it calls newterm, we do it here. 74 */ 75 static NCURSES_INLINE int 76 _nc_initscr(NCURSES_SP_DCL0) 77 { 78 int result = ERR; 79 TERMINAL *term = TerminalOf(SP_PARM); 80 81 /* for extended XPG4 conformance requires cbreak() at this point */ 82 /* (SVr4 curses does this anyway) */ 83 if (NCURSES_SP_NAME(cbreak) (NCURSES_SP_ARG) == OK) { 84 TTY buf; 85 86 buf = term->Nttyb; 87 #ifdef TERMIOS 88 buf.c_lflag &= (unsigned) ~(ECHO | ECHONL); 89 buf.c_iflag &= (unsigned) ~(ICRNL | INLCR | IGNCR); 90 buf.c_oflag &= (unsigned) ~(ONLCR); 91 #elif HAVE_SGTTY_H 92 buf.sg_flags &= ~(ECHO | CRMOD); 93 #else 94 memset(&buf, 0, sizeof(buf)); 95 #endif 96 result = NCURSES_SP_NAME(_nc_set_tty_mode) (NCURSES_SP_ARGx &buf); 97 if (result == OK) 98 term->Nttyb = buf; 99 } 100 return result; 101 } 102 103 /* 104 * filter() has to be called before either initscr() or newterm(), so there is 105 * apparently no way to make this flag apply to some terminals and not others, 106 * aside from possibly delaying a filter() call until some terminals have been 107 * initialized. 108 */ 109 NCURSES_EXPORT(void) 110 NCURSES_SP_NAME(filter) (NCURSES_SP_DCL0) 111 { 112 START_TRACE(); 113 T((T_CALLED("filter(%p)"), (void *) SP_PARM)); 114 #if NCURSES_SP_FUNCS 115 if (IsPreScreen(SP_PARM)) { 116 SP_PARM->_filtered = TRUE; 117 } 118 #else 119 _nc_prescreen.filter_mode = TRUE; 120 #endif 121 returnVoid; 122 } 123 124 #if NCURSES_SP_FUNCS 125 NCURSES_EXPORT(void) 126 filter(void) 127 { 128 START_TRACE(); 129 T((T_CALLED("filter()"))); 130 _nc_prescreen.filter_mode = TRUE; 131 returnVoid; 132 } 133 #endif 134 135 #if NCURSES_EXT_FUNCS 136 /* 137 * An extension, allowing the application to open a new screen without 138 * requiring it to also be filtered. 139 */ 140 NCURSES_EXPORT(void) 141 NCURSES_SP_NAME(nofilter) (NCURSES_SP_DCL0) 142 { 143 START_TRACE(); 144 T((T_CALLED("nofilter(%p)"), (void *) SP_PARM)); 145 #if NCURSES_SP_FUNCS 146 if (IsPreScreen(SP_PARM)) { 147 SP_PARM->_filtered = FALSE; 148 } 149 #else 150 _nc_prescreen.filter_mode = FALSE; 151 #endif 152 returnVoid; 153 } 154 155 #if NCURSES_SP_FUNCS 156 NCURSES_EXPORT(void) 157 nofilter(void) 158 { 159 START_TRACE(); 160 T((T_CALLED("nofilter()"))); 161 _nc_prescreen.filter_mode = FALSE; 162 returnVoid; 163 } 164 #endif 165 #endif /* NCURSES_EXT_FUNCS */ 166 167 NCURSES_EXPORT(SCREEN *) 168 NCURSES_SP_NAME(newterm) (NCURSES_SP_DCLx 169 NCURSES_CONST char *name, 170 FILE *ofp, 171 FILE *ifp) 172 { 173 int value; 174 int errret; 175 SCREEN *result = 0; 176 SCREEN *current; 177 TERMINAL *its_term; 178 FILE *_ofp = ofp ? ofp : stdout; 179 FILE *_ifp = ifp ? ifp : stdin; 180 int cols; 181 int slk_format; 182 int filter_mode; 183 TERMINAL *new_term = 0; 184 185 START_TRACE(); 186 T((T_CALLED("newterm(%p, \"%s\", %p,%p)"), 187 (void *) SP_PARM, 188 name, 189 (void *) ofp, 190 (void *) ifp)); 191 192 #if NCURSES_SP_FUNCS 193 assert(SP_PARM != 0); 194 if (SP_PARM == 0) 195 returnSP(SP_PARM); 196 #endif 197 198 _nc_init_pthreads(); 199 _nc_lock_global(curses); 200 201 current = CURRENT_SCREEN; 202 its_term = (current ? current->_term : 0); 203 204 INIT_TERM_DRIVER(); 205 /* this loads the capability entry, then sets LINES and COLS */ 206 if ( 207 #if NCURSES_SP_FUNCS 208 SP_PARM->_prescreen && 209 #endif 210 TINFO_SETUP_TERM(&new_term, name, 211 fileno(_ofp), &errret, FALSE) != ERR) { 212 213 _nc_set_screen(0); 214 #ifdef USE_TERM_DRIVER 215 assert(new_term != 0); 216 #endif 217 218 #if NCURSES_SP_FUNCS 219 slk_format = SP_PARM->slk_format; 220 filter_mode = SP_PARM->_filtered; 221 #else 222 slk_format = _nc_globals.slk_format; 223 filter_mode = _nc_prescreen.filter_mode; 224 #endif 225 226 /* 227 * This actually allocates the screen structure, and saves the original 228 * terminal settings. 229 */ 230 if (NCURSES_SP_NAME(_nc_setupscreen) ( 231 #if NCURSES_SP_FUNCS 232 &SP_PARM, 233 #endif 234 *(ptrLines(SP_PARM)), 235 *(ptrCols(SP_PARM)), 236 _ofp, 237 filter_mode, 238 slk_format) == ERR) { 239 _nc_set_screen(current); 240 result = 0; 241 } else { 242 #ifdef USE_TERM_DRIVER 243 TERMINAL_CONTROL_BLOCK *TCB; 244 #elif !NCURSES_SP_FUNCS 245 _nc_set_screen(CURRENT_SCREEN); 246 #endif 247 assert(SP_PARM != 0); 248 cols = *(ptrCols(SP_PARM)); 249 #ifdef USE_TERM_DRIVER 250 _nc_set_screen(SP_PARM); 251 TCB = (TERMINAL_CONTROL_BLOCK *) new_term; 252 TCB->csp = SP_PARM; 253 #endif 254 /* 255 * In setupterm() we did a set_curterm(), but it was before we set 256 * CURRENT_SCREEN. So the "current" screen's terminal pointer was 257 * overwritten with a different terminal. Later, in 258 * _nc_setupscreen(), we set CURRENT_SCREEN and the terminal 259 * pointer in the new screen. 260 * 261 * Restore the terminal-pointer for the pre-existing screen, if 262 * any. 263 */ 264 if (current) 265 current->_term = its_term; 266 267 #ifdef USE_TERM_DRIVER 268 SP_PARM->_term = new_term; 269 #else 270 new_term = SP_PARM->_term; 271 #endif 272 273 /* allow user to set maximum escape delay from the environment */ 274 if ((value = _nc_getenv_num("ESCDELAY")) >= 0) { 275 NCURSES_SP_NAME(set_escdelay) (NCURSES_SP_ARGx value); 276 } 277 278 /* if the terminal type has real soft labels, set those up */ 279 if (slk_format && NumLabels > 0 && SLK_STDFMT(slk_format)) 280 _nc_slk_initialize(StdScreen(SP_PARM), cols); 281 282 SP_PARM->_ifd = fileno(_ifp); 283 NCURSES_SP_NAME(typeahead) (NCURSES_SP_ARGx fileno(_ifp)); 284 #ifdef TERMIOS 285 SP_PARM->_use_meta = ((new_term->Ottyb.c_cflag & CSIZE) == CS8 && 286 !(new_term->Ottyb.c_iflag & ISTRIP)); 287 #else 288 SP_PARM->_use_meta = FALSE; 289 #endif 290 SP_PARM->_endwin = FALSE; 291 #ifndef USE_TERM_DRIVER 292 /* 293 * Check whether we can optimize scrolling under dumb terminals in 294 * case we do not have any of these capabilities, scrolling 295 * optimization will be useless. 296 */ 297 SP_PARM->_scrolling = ((scroll_forward && scroll_reverse) || 298 ((parm_rindex || 299 parm_insert_line || 300 insert_line) && 301 (parm_index || 302 parm_delete_line || 303 delete_line))); 304 #endif 305 306 NCURSES_SP_NAME(baudrate) (NCURSES_SP_ARG); /* sets a field in the screen structure */ 307 308 SP_PARM->_keytry = 0; 309 310 /* compute movement costs so we can do better move optimization */ 311 #ifdef USE_TERM_DRIVER 312 TCBOf(SP_PARM)->drv->scinit(SP_PARM); 313 #else 314 /* 315 * Check for mismatched graphic-rendition capabilities. Most SVr4 316 * terminfo trees contain entries that have rmul or rmso equated to 317 * sgr0 (Solaris curses copes with those entries). We do this only 318 * for curses, since many termcap applications assume that 319 * smso/rmso and smul/rmul are paired, and will not function 320 * properly if we remove rmso or rmul. Curses applications 321 * shouldn't be looking at this detail. 322 */ 323 #define SGR0_TEST(mode) (mode != 0) && (exit_attribute_mode == 0 || strcmp(mode, exit_attribute_mode)) 324 SP_PARM->_use_rmso = SGR0_TEST(exit_standout_mode); 325 SP_PARM->_use_rmul = SGR0_TEST(exit_underline_mode); 326 327 /* compute movement costs so we can do better move optimization */ 328 _nc_mvcur_init(); 329 330 /* initialize terminal to a sane state */ 331 _nc_screen_init(); 332 #endif 333 334 /* Initialize the terminal line settings. */ 335 _nc_initscr(NCURSES_SP_ARG); 336 337 _nc_signal_handler(TRUE); 338 result = SP_PARM; 339 } 340 } 341 _nc_unlock_global(curses); 342 returnSP(result); 343 } 344 345 #if NCURSES_SP_FUNCS 346 NCURSES_EXPORT(SCREEN *) 347 newterm(NCURSES_CONST char *name, FILE *ofp, FILE *ifp) 348 { 349 return NCURSES_SP_NAME(newterm) (CURRENT_SCREEN_PRE, name, ofp, ifp); 350 } 351 #endif 352