1 /* $OpenBSD: lib_vidattr.c,v 1.9 2010/01/12 23:22:07 nicm Exp $ */ 2 3 /**************************************************************************** 4 * Copyright (c) 1998-2006,2007 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 * and: Thomas E. Dickey 1996 on * 35 ****************************************************************************/ 36 37 /* 38 * vidputs(newmode, outc) 39 * 40 * newmode is taken to be the logical 'or' of the symbols in curses.h 41 * representing graphic renditions. The terminal is set to be in all of 42 * the given modes, if possible. 43 * 44 * if the new attribute is normal 45 * if exit-alt-char-set exists 46 * emit it 47 * emit exit-attribute-mode 48 * else if set-attributes exists 49 * use it to set exactly what you want 50 * else 51 * if exit-attribute-mode exists 52 * turn off everything 53 * else 54 * turn off those which can be turned off and aren't in 55 * newmode. 56 * turn on each mode which should be on and isn't, one by one 57 * 58 * NOTE that this algorithm won't achieve the desired mix of attributes 59 * in some cases, but those are probably just those cases in which it is 60 * actually impossible, anyway, so... 61 * 62 * NOTE that we cannot assume that there's no interaction between color 63 * and other attribute resets. So each time we reset color (or other 64 * attributes) we'll have to be prepared to restore the other. 65 */ 66 67 #include <curses.priv.h> 68 #include <term.h> 69 70 MODULE_ID("$Id: lib_vidattr.c,v 1.9 2010/01/12 23:22:07 nicm Exp $") 71 72 #define doPut(mode) TPUTS_TRACE(#mode); tputs(mode, 1, outc) 73 74 #define TurnOn(mask,mode) \ 75 if ((turn_on & mask) && mode) { doPut(mode); } 76 77 #define TurnOff(mask,mode) \ 78 if ((turn_off & mask) && mode) { doPut(mode); turn_off &= ~mask; } 79 80 /* if there is no current screen, assume we *can* do color */ 81 #define SetColorsIf(why,old_attr) \ 82 if (can_color && (why)) { \ 83 int old_pair = PAIR_NUMBER(old_attr); \ 84 TR(TRACE_ATTRS, ("old pair = %d -- new pair = %d", old_pair, pair)); \ 85 if ((pair != old_pair) \ 86 || (fix_pair0 && (pair == 0)) \ 87 || (reverse ^ ((old_attr & A_REVERSE) != 0))) { \ 88 _nc_do_color(old_pair, pair, reverse, outc); \ 89 } \ 90 } 91 92 #define PreviousAttr _nc_prescreen.previous_attr 93 94 NCURSES_EXPORT(int) 95 vidputs(chtype newmode, int (*outc) (int)) 96 { 97 attr_t turn_on, turn_off; 98 int pair; 99 bool reverse = FALSE; 100 bool can_color = (SP == 0 || SP->_coloron); 101 #if NCURSES_EXT_FUNCS 102 bool fix_pair0 = (SP != 0 && SP->_coloron && !SP->_default_color); 103 #else 104 #define fix_pair0 FALSE 105 #endif 106 107 newmode &= A_ATTRIBUTES; 108 T((T_CALLED("vidputs(%s)"), _traceattr(newmode))); 109 110 /* this allows us to go on whether or not newterm() has been called */ 111 if (SP) 112 PreviousAttr = AttrOf(SCREEN_ATTRS(SP)); 113 114 TR(TRACE_ATTRS, ("previous attribute was %s", _traceattr(PreviousAttr))); 115 116 if ((SP != 0) 117 && (magic_cookie_glitch > 0)) { 118 #if USE_XMC_SUPPORT 119 static const chtype table[] = 120 { 121 A_STANDOUT, 122 A_UNDERLINE, 123 A_REVERSE, 124 A_BLINK, 125 A_DIM, 126 A_BOLD, 127 A_INVIS, 128 A_PROTECT, 129 }; 130 unsigned n; 131 int used = 0; 132 int limit = (max_attributes <= 0) ? 1 : max_attributes; 133 chtype retain = 0; 134 135 /* 136 * Limit the number of attribute bits set in the newmode according to 137 * the terminfo max_attributes value. 138 */ 139 for (n = 0; n < SIZEOF(table); ++n) { 140 if ((table[n] & SP->_ok_attributes) == 0) { 141 newmode &= ~table[n]; 142 } else if ((table[n] & newmode) != 0) { 143 if (used++ >= limit) { 144 newmode &= ~table[n]; 145 if (newmode == retain) 146 break; 147 } else { 148 retain = newmode; 149 } 150 } 151 } 152 #else 153 newmode &= ~(SP->_xmc_suppress); 154 #endif 155 TR(TRACE_ATTRS, ("suppressed attribute is %s", _traceattr(newmode))); 156 } 157 158 /* 159 * If we have a terminal that cannot combine color with video 160 * attributes, use the colors in preference. 161 */ 162 if (((newmode & A_COLOR) != 0 163 || fix_pair0) 164 && (no_color_video > 0)) { 165 /* 166 * If we had chosen the A_xxx definitions to correspond to the 167 * no_color_video mask, we could simply shift it up and mask off the 168 * attributes. But we did not (actually copied Solaris' definitions). 169 * However, this is still simpler/faster than a lookup table. 170 * 171 * The 63 corresponds to A_STANDOUT, A_UNDERLINE, A_REVERSE, A_BLINK, 172 * A_DIM, A_BOLD which are 1:1 with no_color_video. The bits that 173 * correspond to A_INVIS, A_PROTECT (192) must be shifted up 1 and 174 * A_ALTCHARSET (256) down 2 to line up. We use the NCURSES_BITS 175 * macro so this will work properly for the wide-character layout. 176 */ 177 unsigned value = no_color_video; 178 attr_t mask = NCURSES_BITS((value & 63) 179 | ((value & 192) << 1) 180 | ((value & 256) >> 2), 8); 181 182 if ((mask & A_REVERSE) != 0 183 && (newmode & A_REVERSE) != 0) { 184 reverse = TRUE; 185 mask &= ~A_REVERSE; 186 } 187 newmode &= ~mask; 188 } 189 190 if (newmode == PreviousAttr) 191 returnCode(OK); 192 193 pair = PAIR_NUMBER(newmode); 194 195 if (reverse) { 196 newmode &= ~A_REVERSE; 197 } 198 199 turn_off = (~newmode & PreviousAttr) & ALL_BUT_COLOR; 200 turn_on = (newmode & ~PreviousAttr) & ALL_BUT_COLOR; 201 202 SetColorsIf(((pair == 0) && !fix_pair0), PreviousAttr); 203 204 if (newmode == A_NORMAL) { 205 if ((PreviousAttr & A_ALTCHARSET) && exit_alt_charset_mode) { 206 doPut(exit_alt_charset_mode); 207 PreviousAttr &= ~A_ALTCHARSET; 208 } 209 if (PreviousAttr) { 210 if (exit_attribute_mode) { 211 doPut(exit_attribute_mode); 212 } else { 213 if (!SP || SP->_use_rmul) { 214 TurnOff(A_UNDERLINE, exit_underline_mode); 215 } 216 if (!SP || SP->_use_rmso) { 217 TurnOff(A_STANDOUT, exit_standout_mode); 218 } 219 } 220 PreviousAttr &= ALL_BUT_COLOR; 221 } 222 223 SetColorsIf((pair != 0) || fix_pair0, PreviousAttr); 224 } else if (set_attributes) { 225 if (turn_on || turn_off) { 226 TPUTS_TRACE("set_attributes"); 227 tputs(tparm(set_attributes, 228 (newmode & A_STANDOUT) != 0, 229 (newmode & A_UNDERLINE) != 0, 230 (newmode & A_REVERSE) != 0, 231 (newmode & A_BLINK) != 0, 232 (newmode & A_DIM) != 0, 233 (newmode & A_BOLD) != 0, 234 (newmode & A_INVIS) != 0, 235 (newmode & A_PROTECT) != 0, 236 (newmode & A_ALTCHARSET) != 0), 1, outc); 237 PreviousAttr &= ALL_BUT_COLOR; 238 } 239 SetColorsIf((pair != 0) || fix_pair0, PreviousAttr); 240 } else { 241 242 TR(TRACE_ATTRS, ("turning %s off", _traceattr(turn_off))); 243 244 TurnOff(A_ALTCHARSET, exit_alt_charset_mode); 245 246 if (!SP || SP->_use_rmul) { 247 TurnOff(A_UNDERLINE, exit_underline_mode); 248 } 249 250 if (!SP || SP->_use_rmso) { 251 TurnOff(A_STANDOUT, exit_standout_mode); 252 } 253 254 if (turn_off && exit_attribute_mode) { 255 doPut(exit_attribute_mode); 256 turn_on |= (newmode & ALL_BUT_COLOR); 257 PreviousAttr &= ALL_BUT_COLOR; 258 } 259 SetColorsIf((pair != 0) || fix_pair0, PreviousAttr); 260 261 TR(TRACE_ATTRS, ("turning %s on", _traceattr(turn_on))); 262 /* *INDENT-OFF* */ 263 TurnOn(A_ALTCHARSET, enter_alt_charset_mode); 264 TurnOn(A_BLINK, enter_blink_mode); 265 TurnOn(A_BOLD, enter_bold_mode); 266 TurnOn(A_DIM, enter_dim_mode); 267 TurnOn(A_REVERSE, enter_reverse_mode); 268 TurnOn(A_STANDOUT, enter_standout_mode); 269 TurnOn(A_PROTECT, enter_protected_mode); 270 TurnOn(A_INVIS, enter_secure_mode); 271 TurnOn(A_UNDERLINE, enter_underline_mode); 272 #if USE_WIDEC_SUPPORT 273 TurnOn(A_HORIZONTAL, enter_horizontal_hl_mode); 274 TurnOn(A_LEFT, enter_left_hl_mode); 275 TurnOn(A_LOW, enter_low_hl_mode); 276 TurnOn(A_RIGHT, enter_right_hl_mode); 277 TurnOn(A_TOP, enter_top_hl_mode); 278 TurnOn(A_VERTICAL, enter_vertical_hl_mode); 279 #endif 280 /* *INDENT-ON* */ 281 282 } 283 284 if (reverse) 285 newmode |= A_REVERSE; 286 287 if (SP) 288 SetAttr(SCREEN_ATTRS(SP), newmode); 289 else 290 PreviousAttr = newmode; 291 292 returnCode(OK); 293 } 294 295 NCURSES_EXPORT(int) 296 vidattr(chtype newmode) 297 { 298 T((T_CALLED("vidattr(%s)"), _traceattr(newmode))); 299 300 returnCode(vidputs(newmode, _nc_outch)); 301 } 302 303 NCURSES_EXPORT(chtype) 304 termattrs(void) 305 { 306 chtype attrs = A_NORMAL; 307 308 T((T_CALLED("termattrs()"))); 309 if (enter_alt_charset_mode) 310 attrs |= A_ALTCHARSET; 311 312 if (enter_blink_mode) 313 attrs |= A_BLINK; 314 315 if (enter_bold_mode) 316 attrs |= A_BOLD; 317 318 if (enter_dim_mode) 319 attrs |= A_DIM; 320 321 if (enter_reverse_mode) 322 attrs |= A_REVERSE; 323 324 if (enter_standout_mode) 325 attrs |= A_STANDOUT; 326 327 if (enter_protected_mode) 328 attrs |= A_PROTECT; 329 330 if (enter_secure_mode) 331 attrs |= A_INVIS; 332 333 if (enter_underline_mode) 334 attrs |= A_UNDERLINE; 335 336 if (SP->_coloron) 337 attrs |= A_COLOR; 338 339 returnChar(attrs); 340 } 341