1 /**************************************************************************** 2 * Copyright (c) 1998-2006,2007 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 ****************************************************************************/ 34 35 /* 36 * vidputs(newmode, outc) 37 * 38 * newmode is taken to be the logical 'or' of the symbols in curses.h 39 * representing graphic renditions. The terminal is set to be in all of 40 * the given modes, if possible. 41 * 42 * if the new attribute is normal 43 * if exit-alt-char-set exists 44 * emit it 45 * emit exit-attribute-mode 46 * else if set-attributes exists 47 * use it to set exactly what you want 48 * else 49 * if exit-attribute-mode exists 50 * turn off everything 51 * else 52 * turn off those which can be turned off and aren't in 53 * newmode. 54 * turn on each mode which should be on and isn't, one by one 55 * 56 * NOTE that this algorithm won't achieve the desired mix of attributes 57 * in some cases, but those are probably just those cases in which it is 58 * actually impossible, anyway, so... 59 * 60 * NOTE that we cannot assume that there's no interaction between color 61 * and other attribute resets. So each time we reset color (or other 62 * attributes) we'll have to be prepared to restore the other. 63 */ 64 65 #include <curses.priv.h> 66 #include <term.h> 67 68 MODULE_ID("$Id: lib_vidattr.c,v 1.49 2007/06/30 21:58:04 tom Exp $") 69 70 #define doPut(mode) TPUTS_TRACE(#mode); tputs(mode, 1, outc) 71 72 #define TurnOn(mask,mode) \ 73 if ((turn_on & mask) && mode) { doPut(mode); } 74 75 #define TurnOff(mask,mode) \ 76 if ((turn_off & mask) && mode) { doPut(mode); turn_off &= ~mask; } 77 78 /* if there is no current screen, assume we *can* do color */ 79 #define SetColorsIf(why,old_attr) \ 80 if (can_color && (why)) { \ 81 int old_pair = PAIR_NUMBER(old_attr); \ 82 TR(TRACE_ATTRS, ("old pair = %d -- new pair = %d", old_pair, pair)); \ 83 if ((pair != old_pair) \ 84 || (fix_pair0 && (pair == 0)) \ 85 || (reverse ^ ((old_attr & A_REVERSE) != 0))) { \ 86 _nc_do_color(old_pair, pair, reverse, outc); \ 87 } \ 88 } 89 90 #define PreviousAttr _nc_prescreen.previous_attr 91 92 NCURSES_EXPORT(int) 93 vidputs(chtype newmode, int (*outc) (int)) 94 { 95 attr_t turn_on, turn_off; 96 int pair; 97 bool reverse = FALSE; 98 bool can_color = (SP == 0 || SP->_coloron); 99 #if NCURSES_EXT_FUNCS 100 bool fix_pair0 = (SP != 0 && SP->_coloron && !SP->_default_color); 101 #else 102 #define fix_pair0 FALSE 103 #endif 104 105 newmode &= A_ATTRIBUTES; 106 T((T_CALLED("vidputs(%s)"), _traceattr(newmode))); 107 108 /* this allows us to go on whether or not newterm() has been called */ 109 if (SP) 110 PreviousAttr = AttrOf(SCREEN_ATTRS(SP)); 111 112 TR(TRACE_ATTRS, ("previous attribute was %s", _traceattr(PreviousAttr))); 113 114 if ((SP != 0) 115 && (magic_cookie_glitch > 0)) { 116 #if USE_XMC_SUPPORT 117 static const chtype table[] = 118 { 119 A_STANDOUT, 120 A_UNDERLINE, 121 A_REVERSE, 122 A_BLINK, 123 A_DIM, 124 A_BOLD, 125 A_INVIS, 126 A_PROTECT, 127 }; 128 unsigned n; 129 int used = 0; 130 int limit = (max_attributes <= 0) ? 1 : max_attributes; 131 chtype retain = 0; 132 133 /* 134 * Limit the number of attribute bits set in the newmode according to 135 * the terminfo max_attributes value. 136 */ 137 for (n = 0; n < SIZEOF(table); ++n) { 138 if ((table[n] & SP->_ok_attributes) == 0) { 139 newmode &= ~table[n]; 140 } else if ((table[n] & newmode) != 0) { 141 if (used++ >= limit) { 142 newmode &= ~table[n]; 143 if (newmode == retain) 144 break; 145 } else { 146 retain = newmode; 147 } 148 } 149 } 150 #else 151 newmode &= ~(SP->_xmc_suppress); 152 #endif 153 TR(TRACE_ATTRS, ("suppressed attribute is %s", _traceattr(newmode))); 154 } 155 156 /* 157 * If we have a terminal that cannot combine color with video 158 * attributes, use the colors in preference. 159 */ 160 if (((newmode & A_COLOR) != 0 161 || fix_pair0) 162 && (no_color_video > 0)) { 163 /* 164 * If we had chosen the A_xxx definitions to correspond to the 165 * no_color_video mask, we could simply shift it up and mask off the 166 * attributes. But we did not (actually copied Solaris' definitions). 167 * However, this is still simpler/faster than a lookup table. 168 * 169 * The 63 corresponds to A_STANDOUT, A_UNDERLINE, A_REVERSE, A_BLINK, 170 * A_DIM, A_BOLD which are 1:1 with no_color_video. The bits that 171 * correspond to A_INVIS, A_PROTECT (192) must be shifted up 1 and 172 * A_ALTCHARSET (256) down 2 to line up. We use the NCURSES_BITS 173 * macro so this will work properly for the wide-character layout. 174 */ 175 unsigned value = no_color_video; 176 attr_t mask = NCURSES_BITS((value & 63) 177 | ((value & 192) << 1) 178 | ((value & 256) >> 2), 8); 179 180 if ((mask & A_REVERSE) != 0 181 && (newmode & A_REVERSE) != 0) { 182 reverse = TRUE; 183 mask &= ~A_REVERSE; 184 } 185 newmode &= ~mask; 186 } 187 188 if (newmode == PreviousAttr) 189 returnCode(OK); 190 191 pair = PAIR_NUMBER(newmode); 192 193 if (reverse) { 194 newmode &= ~A_REVERSE; 195 } 196 197 turn_off = (~newmode & PreviousAttr) & ALL_BUT_COLOR; 198 turn_on = (newmode & ~PreviousAttr) & ALL_BUT_COLOR; 199 200 SetColorsIf(((pair == 0) && !fix_pair0), PreviousAttr); 201 202 if (newmode == A_NORMAL) { 203 if ((PreviousAttr & A_ALTCHARSET) && exit_alt_charset_mode) { 204 doPut(exit_alt_charset_mode); 205 PreviousAttr &= ~A_ALTCHARSET; 206 } 207 if (PreviousAttr) { 208 if (exit_attribute_mode) { 209 doPut(exit_attribute_mode); 210 } else { 211 if (!SP || SP->_use_rmul) { 212 TurnOff(A_UNDERLINE, exit_underline_mode); 213 } 214 if (!SP || SP->_use_rmso) { 215 TurnOff(A_STANDOUT, exit_standout_mode); 216 } 217 } 218 PreviousAttr &= ALL_BUT_COLOR; 219 } 220 221 SetColorsIf((pair != 0) || fix_pair0, PreviousAttr); 222 } else if (set_attributes) { 223 if (turn_on || turn_off) { 224 TPUTS_TRACE("set_attributes"); 225 tputs(tparm(set_attributes, 226 (newmode & A_STANDOUT) != 0, 227 (newmode & A_UNDERLINE) != 0, 228 (newmode & A_REVERSE) != 0, 229 (newmode & A_BLINK) != 0, 230 (newmode & A_DIM) != 0, 231 (newmode & A_BOLD) != 0, 232 (newmode & A_INVIS) != 0, 233 (newmode & A_PROTECT) != 0, 234 (newmode & A_ALTCHARSET) != 0), 1, outc); 235 PreviousAttr &= ALL_BUT_COLOR; 236 } 237 SetColorsIf((pair != 0) || fix_pair0, PreviousAttr); 238 } else { 239 240 TR(TRACE_ATTRS, ("turning %s off", _traceattr(turn_off))); 241 242 TurnOff(A_ALTCHARSET, exit_alt_charset_mode); 243 244 if (!SP || SP->_use_rmul) { 245 TurnOff(A_UNDERLINE, exit_underline_mode); 246 } 247 248 if (!SP || SP->_use_rmso) { 249 TurnOff(A_STANDOUT, exit_standout_mode); 250 } 251 252 if (turn_off && exit_attribute_mode) { 253 doPut(exit_attribute_mode); 254 turn_on |= (newmode & ALL_BUT_COLOR); 255 PreviousAttr &= ALL_BUT_COLOR; 256 } 257 SetColorsIf((pair != 0) || fix_pair0, PreviousAttr); 258 259 TR(TRACE_ATTRS, ("turning %s on", _traceattr(turn_on))); 260 /* *INDENT-OFF* */ 261 TurnOn(A_ALTCHARSET, enter_alt_charset_mode); 262 TurnOn(A_BLINK, enter_blink_mode); 263 TurnOn(A_BOLD, enter_bold_mode); 264 TurnOn(A_DIM, enter_dim_mode); 265 TurnOn(A_REVERSE, enter_reverse_mode); 266 TurnOn(A_STANDOUT, enter_standout_mode); 267 TurnOn(A_PROTECT, enter_protected_mode); 268 TurnOn(A_INVIS, enter_secure_mode); 269 TurnOn(A_UNDERLINE, enter_underline_mode); 270 #if USE_WIDEC_SUPPORT 271 TurnOn(A_HORIZONTAL, enter_horizontal_hl_mode); 272 TurnOn(A_LEFT, enter_left_hl_mode); 273 TurnOn(A_LOW, enter_low_hl_mode); 274 TurnOn(A_RIGHT, enter_right_hl_mode); 275 TurnOn(A_TOP, enter_top_hl_mode); 276 TurnOn(A_VERTICAL, enter_vertical_hl_mode); 277 #endif 278 /* *INDENT-ON* */ 279 280 } 281 282 if (reverse) 283 newmode |= A_REVERSE; 284 285 if (SP) 286 SetAttr(SCREEN_ATTRS(SP), newmode); 287 else 288 PreviousAttr = newmode; 289 290 returnCode(OK); 291 } 292 293 NCURSES_EXPORT(int) 294 vidattr(chtype newmode) 295 { 296 T((T_CALLED("vidattr(%s)"), _traceattr(newmode))); 297 298 returnCode(vidputs(newmode, _nc_outch)); 299 } 300 301 NCURSES_EXPORT(chtype) 302 termattrs(void) 303 { 304 chtype attrs = A_NORMAL; 305 306 T((T_CALLED("termattrs()"))); 307 if (enter_alt_charset_mode) 308 attrs |= A_ALTCHARSET; 309 310 if (enter_blink_mode) 311 attrs |= A_BLINK; 312 313 if (enter_bold_mode) 314 attrs |= A_BOLD; 315 316 if (enter_dim_mode) 317 attrs |= A_DIM; 318 319 if (enter_reverse_mode) 320 attrs |= A_REVERSE; 321 322 if (enter_standout_mode) 323 attrs |= A_STANDOUT; 324 325 if (enter_protected_mode) 326 attrs |= A_PROTECT; 327 328 if (enter_secure_mode) 329 attrs |= A_INVIS; 330 331 if (enter_underline_mode) 332 attrs |= A_UNDERLINE; 333 334 if (SP->_coloron) 335 attrs |= A_COLOR; 336 337 returnChar(attrs); 338 } 339