release/src/router/libncurses/ncurses/base/lib_newterm.c

   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