release/src/router/libncurses/ncurses/tty/lib_vidattr.c

   1 /****************************************************************************
   2  * Copyright (c) 1998-2013,2014 Free Software Foundation, Inc.              *
   3  *                                                                          *
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  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  *      vidputs(newmode, outc)
  38  *
  39  *      newmode is taken to be the logical 'or' of the symbols in curses.h
  40  *      representing graphic renditions.  The terminal is set to be in all of
  41  *      the given modes, if possible.
  42  *
  43  *      if the new attribute is normal
  44  *              if exit-alt-char-set exists
  45  *                      emit it
  46  *              emit exit-attribute-mode
  47  *      else if set-attributes exists
  48  *              use it to set exactly what you want
  49  *      else
  50  *              if exit-attribute-mode exists
  51  *                      turn off everything
  52  *              else
  53  *                      turn off those which can be turned off and aren't in
  54  *                      newmode.
  55  *              turn on each mode which should be on and isn't, one by one
  56  *
  57  *      NOTE that this algorithm won't achieve the desired mix of attributes
  58  *      in some cases, but those are probably just those cases in which it is
  59  *      actually impossible, anyway, so...
  60  *
  61  *      NOTE that we cannot assume that there's no interaction between color
  62  *      and other attribute resets.  So each time we reset color (or other
  63  *      attributes) we'll have to be prepared to restore the other.
  64  */
  65
  66 #include <curses.priv.h>
  67
  68 #ifndef CUR
  69 #define CUR SP_TERMTYPE
  70 #endif
  71
  72 MODULE_ID("$Id: lib_vidattr.c,v 1.71 2014/09/04 22:01:27 tom Exp $")
  73
  74 #define doPut(mode) \
  75         TPUTS_TRACE(#mode); \
  76         NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx mode, 1, outc)
  77
  78 #define TurnOn(mask, mode) \
  79         if ((turn_on & mask) && mode) { doPut(mode); }
  80
  81 #define TurnOff(mask, mode) \
  82         if ((turn_off & mask) && mode) { doPut(mode); turn_off &= ~mask; }
  83
  84         /* if there is no current screen, assume we *can* do color */
  85 #define SetColorsIf(why, old_attr) \
  86         if (can_color && (why)) { \
  87                 int old_pair = PairNumber(old_attr); \
  88                 TR(TRACE_ATTRS, ("old pair = %d -- new pair = %d", old_pair, pair)); \
  89                 if ((pair != old_pair) \
  90                  || (fix_pair0 && (pair == 0)) \
  91                  || (reverse ^ ((old_attr & A_REVERSE) != 0))) { \
  92                      NCURSES_SP_NAME(_nc_do_color) (NCURSES_SP_ARGx \
  93                                      (short) old_pair, \
  94                                      (short) pair, \
  95                                      reverse, outc); \
  96                 } \
  97         }
  98
  99 #define PreviousAttr _nc_prescreen.previous_attr
 100
 101 NCURSES_EXPORT(int)
 102 NCURSES_SP_NAME(vidputs) (NCURSES_SP_DCLx
 103                           chtype newmode,
 104                           NCURSES_SP_OUTC outc)
 105 {
 106     attr_t turn_on, turn_off;
 107     int pair;
 108     bool reverse = FALSE;
 109     bool can_color = (SP_PARM == 0 || SP_PARM->_coloron);
 110 #if NCURSES_EXT_FUNCS
 111     bool fix_pair0 = (SP_PARM != 0 && SP_PARM->_coloron && !SP_PARM->_default_color);
 112 #else
 113 #define fix_pair0 FALSE
 114 #endif
 115
 116     newmode &= A_ATTRIBUTES;
 117
 118     T((T_CALLED("vidputs(%p,%s)"), (void *) SP_PARM, _traceattr(newmode)));
 119
 120     if (!IsTermInfo(SP_PARM))
 121         returnCode(ERR);
 122
 123     /* this allows us to go on whether or not newterm() has been called */
 124     if (SP_PARM)
 125         PreviousAttr = AttrOf(SCREEN_ATTRS(SP_PARM));
 126
 127     TR(TRACE_ATTRS, ("previous attribute was %s", _traceattr(PreviousAttr)));
 128
 129     if ((SP_PARM != 0)
 130         && (magic_cookie_glitch > 0)) {
 131 #if USE_XMC_SUPPORT
 132         static const chtype table[] =
 133         {
 134             A_STANDOUT,
 135             A_UNDERLINE,
 136             A_REVERSE,
 137             A_BLINK,
 138             A_DIM,
 139             A_BOLD,
 140             A_INVIS,
 141             A_PROTECT,
 142 #if USE_ITALIC
 143             A_ITALIC,
 144 #endif
 145         };
 146         unsigned n;
 147         int used = 0;
 148         int limit = (max_attributes <= 0) ? 1 : max_attributes;
 149         chtype retain = 0;
 150
 151         /*
 152          * Limit the number of attribute bits set in the newmode according to
 153          * the terminfo max_attributes value.
 154          */
 155         for (n = 0; n < SIZEOF(table); ++n) {
 156             if ((table[n] & SP_PARM->_ok_attributes) == 0) {
 157                 newmode &= ~table[n];
 158             } else if ((table[n] & newmode) != 0) {
 159                 if (used++ >= limit) {
 160                     newmode &= ~table[n];
 161                     if (newmode == retain)
 162                         break;
 163                 } else {
 164                     retain = newmode;
 165                 }
 166             }
 167         }
 168 #else
 169         newmode &= ~(SP_PARM->_xmc_suppress);
 170 #endif
 171         TR(TRACE_ATTRS, ("suppressed attribute is %s", _traceattr(newmode)));
 172     }
 173
 174     /*
 175      * If we have a terminal that cannot combine color with video
 176      * attributes, use the colors in preference.
 177      */
 178     if (((newmode & A_COLOR) != 0
 179          || fix_pair0)
 180         && (no_color_video > 0)) {
 181         /*
 182          * If we had chosen the A_xxx definitions to correspond to the
 183          * no_color_video mask, we could simply shift it up and mask off the
 184          * attributes.  But we did not (actually copied Solaris' definitions).
 185          * However, this is still simpler/faster than a lookup table.
 186          *
 187          * The 63 corresponds to A_STANDOUT, A_UNDERLINE, A_REVERSE, A_BLINK,
 188          * A_DIM, A_BOLD which are 1:1 with no_color_video.  The bits that
 189          * correspond to A_INVIS, A_PROTECT (192) must be shifted up 1 and
 190          * A_ALTCHARSET (256) down 2 to line up.  We use the NCURSES_BITS
 191          * macro so this will work properly for the wide-character layout.
 192          */
 193         unsigned value = (unsigned) no_color_video;
 194         attr_t mask = NCURSES_BITS((value & 63)
 195                                    | ((value & 192) << 1)
 196                                    | ((value & 256) >> 2), 8);
 197
 198         if ((mask & A_REVERSE) != 0
 199             && (newmode & A_REVERSE) != 0) {
 200             reverse = TRUE;
 201             mask &= ~A_REVERSE;
 202         }
 203         newmode &= ~mask;
 204     }
 205
 206     if (newmode == PreviousAttr)
 207         returnCode(OK);
 208
 209     pair = PairNumber(newmode);
 210
 211     if (reverse) {
 212         newmode &= ~A_REVERSE;
 213     }
 214
 215     turn_off = (~newmode & PreviousAttr) & ALL_BUT_COLOR;
 216     turn_on = (newmode & ~(PreviousAttr & TPARM_ATTR)) & ALL_BUT_COLOR;
 217
 218     SetColorsIf(((pair == 0) && !fix_pair0), PreviousAttr);
 219
 220     if (newmode == A_NORMAL) {
 221         if ((PreviousAttr & A_ALTCHARSET) && exit_alt_charset_mode) {
 222             doPut(exit_alt_charset_mode);
 223             PreviousAttr &= ~A_ALTCHARSET;
 224         }
 225         if (PreviousAttr) {
 226             if (exit_attribute_mode) {
 227                 doPut(exit_attribute_mode);
 228             } else {
 229                 if (!SP_PARM || SP_PARM->_use_rmul) {
 230                     TurnOff(A_UNDERLINE, exit_underline_mode);
 231                 }
 232                 if (!SP_PARM || SP_PARM->_use_rmso) {
 233                     TurnOff(A_STANDOUT, exit_standout_mode);
 234                 }
 235 #if USE_ITALIC
 236                 if (!SP_PARM || SP_PARM->_use_ritm) {
 237                     TurnOff(A_ITALIC, exit_italics_mode);
 238                 }
 239 #endif
 240             }
 241             PreviousAttr &= ALL_BUT_COLOR;
 242         }
 243
 244         SetColorsIf((pair != 0) || fix_pair0, PreviousAttr);
 245     } else if (set_attributes) {
 246         if (turn_on || turn_off) {
 247             TPUTS_TRACE("set_attributes");
 248             NCURSES_SP_NAME(tputs) (NCURSES_SP_ARGx
 249                                     tparm(set_attributes,
 250                                           (newmode & A_STANDOUT) != 0,
 251                                           (newmode & A_UNDERLINE) != 0,
 252                                           (newmode & A_REVERSE) != 0,
 253                                           (newmode & A_BLINK) != 0,
 254                                           (newmode & A_DIM) != 0,
 255                                           (newmode & A_BOLD) != 0,
 256                                           (newmode & A_INVIS) != 0,
 257                                           (newmode & A_PROTECT) != 0,
 258                                           (newmode & A_ALTCHARSET) != 0),
 259                                     1, outc);
 260             PreviousAttr &= ALL_BUT_COLOR;
 261         }
 262 #if USE_ITALIC
 263         if (!SP_PARM || SP_PARM->_use_ritm) {
 264             if (turn_on & A_ITALIC) {
 265                 TurnOn(A_ITALIC, enter_italics_mode);
 266             } else if (turn_off & A_ITALIC) {
 267                 TurnOff(A_ITALIC, exit_italics_mode);
 268             }
 269         }
 270 #endif
 271         SetColorsIf((pair != 0) || fix_pair0, PreviousAttr);
 272     } else {
 273
 274         TR(TRACE_ATTRS, ("turning %s off", _traceattr(turn_off)));
 275
 276         TurnOff(A_ALTCHARSET, exit_alt_charset_mode);
 277
 278         if (!SP_PARM || SP_PARM->_use_rmul) {
 279             TurnOff(A_UNDERLINE, exit_underline_mode);
 280         }
 281
 282         if (!SP_PARM || SP_PARM->_use_rmso) {
 283             TurnOff(A_STANDOUT, exit_standout_mode);
 284         }
 285 #if USE_ITALIC
 286         if (!SP_PARM || SP_PARM->_use_ritm) {
 287             TurnOff(A_ITALIC, exit_italics_mode);
 288         }
 289 #endif
 290         if (turn_off && exit_attribute_mode) {
 291             doPut(exit_attribute_mode);
 292             turn_on |= (newmode & ALL_BUT_COLOR);
 293             PreviousAttr &= ALL_BUT_COLOR;
 294         }
 295         SetColorsIf((pair != 0) || fix_pair0, PreviousAttr);
 296
 297         TR(TRACE_ATTRS, ("turning %s on", _traceattr(turn_on)));
 298         /* *INDENT-OFF* */
 299         TurnOn(A_ALTCHARSET,    enter_alt_charset_mode);
 300         TurnOn(A_BLINK,         enter_blink_mode);
 301         TurnOn(A_BOLD,          enter_bold_mode);
 302         TurnOn(A_DIM,           enter_dim_mode);
 303         TurnOn(A_REVERSE,       enter_reverse_mode);
 304         TurnOn(A_STANDOUT,      enter_standout_mode);
 305         TurnOn(A_PROTECT,       enter_protected_mode);
 306         TurnOn(A_INVIS,         enter_secure_mode);
 307         TurnOn(A_UNDERLINE,     enter_underline_mode);
 308 #if USE_ITALIC
 309         TurnOn(A_ITALIC,        enter_italics_mode);
 310 #endif
 311 #if USE_WIDEC_SUPPORT
 312         TurnOn(A_HORIZONTAL,    enter_horizontal_hl_mode);
 313         TurnOn(A_LEFT,          enter_left_hl_mode);
 314         TurnOn(A_LOW,           enter_low_hl_mode);
 315         TurnOn(A_RIGHT,         enter_right_hl_mode);
 316         TurnOn(A_TOP,           enter_top_hl_mode);
 317         TurnOn(A_VERTICAL,      enter_vertical_hl_mode);
 318 #endif
 319         /* *INDENT-ON* */
 320
 321     }
 322
 323     if (reverse)
 324         newmode |= A_REVERSE;
 325
 326     if (SP_PARM)
 327         SetAttr(SCREEN_ATTRS(SP_PARM), newmode);
 328     else
 329         PreviousAttr = newmode;
 330
 331     returnCode(OK);
 332 }
 333
 334 #if NCURSES_SP_FUNCS
 335 NCURSES_EXPORT(int)
 336 vidputs(chtype newmode, NCURSES_OUTC outc)
 337 {
 338     SetSafeOutcWrapper(outc);
 339     return NCURSES_SP_NAME(vidputs) (CURRENT_SCREEN,
 340                                      newmode,
 341                                      _nc_outc_wrapper);
 342 }
 343 #endif
 344
 345 NCURSES_EXPORT(int)
 346 NCURSES_SP_NAME(vidattr) (NCURSES_SP_DCLx chtype newmode)
 347 {
 348     T((T_CALLED("vidattr(%p,%s)"), (void *) SP_PARM, _traceattr(newmode)));
 349     returnCode(NCURSES_SP_NAME(vidputs) (NCURSES_SP_ARGx
 350                                          newmode,
 351                                          NCURSES_SP_NAME(_nc_putchar)));
 352 }
 353
 354 #if NCURSES_SP_FUNCS
 355 NCURSES_EXPORT(int)
 356 vidattr(chtype newmode)
 357 {
 358     return NCURSES_SP_NAME(vidattr) (CURRENT_SCREEN, newmode);
 359 }
 360 #endif
 361
 362 NCURSES_EXPORT(chtype)
 363 NCURSES_SP_NAME(termattrs) (NCURSES_SP_DCL0)
 364 {
 365     chtype attrs = A_NORMAL;
 366
 367     T((T_CALLED("termattrs(%p)"), (void *) SP_PARM));
 368
 369     if (HasTerminal(SP_PARM)) {
 370 #ifdef USE_TERM_DRIVER
 371         attrs = CallDriver(SP_PARM, td_conattr);
 372 #else /* ! USE_TERM_DRIVER */
 373
 374         if (enter_alt_charset_mode)
 375             attrs |= A_ALTCHARSET;
 376
 377         if (enter_blink_mode)
 378             attrs |= A_BLINK;
 379
 380         if (enter_bold_mode)
 381             attrs |= A_BOLD;
 382
 383         if (enter_dim_mode)
 384             attrs |= A_DIM;
 385
 386         if (enter_reverse_mode)
 387             attrs |= A_REVERSE;
 388
 389         if (enter_standout_mode)
 390             attrs |= A_STANDOUT;
 391
 392         if (enter_protected_mode)
 393             attrs |= A_PROTECT;
 394
 395         if (enter_secure_mode)
 396             attrs |= A_INVIS;
 397
 398         if (enter_underline_mode)
 399             attrs |= A_UNDERLINE;
 400
 401         if (SP_PARM->_coloron)
 402             attrs |= A_COLOR;
 403
 404 #if USE_ITALIC
 405         if (enter_italics_mode)
 406             attrs |= A_ITALIC;
 407 #endif
 408
 409 #endif /* USE_TERM_DRIVER */
 410     }
 411     returnChtype(attrs);
 412 }
 413
 414 #if NCURSES_SP_FUNCS
 415 NCURSES_EXPORT(chtype)
 416 termattrs(void)
 417 {
 418     return NCURSES_SP_NAME(termattrs) (CURRENT_SCREEN);
 419 }
 420 #endif