1 /**************************************************************************** 2 * Copyright (c) 1998-2005,2006 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 1.46 2006/01/21 23:39:40 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 NCURSES_EXPORT(int) 91 vidputs(chtype newmode, int (*outc) (int)) 92 { 93 static attr_t previous_attr = A_NORMAL; 94 attr_t turn_on, turn_off; 95 int pair; 96 bool reverse = FALSE; 97 bool can_color = (SP == 0 || SP->_coloron); 98 #if NCURSES_EXT_FUNCS 99 bool fix_pair0 = (SP != 0 && SP->_coloron && !SP->_default_color); 100 #else 101 #define fix_pair0 FALSE 102 #endif 103 104 T((T_CALLED("vidputs(%s)"), _traceattr(newmode))); 105 106 /* this allows us to go on whether or not newterm() has been called */ 107 if (SP) 108 previous_attr = AttrOf(SCREEN_ATTRS(SP)); 109 110 TR(TRACE_ATTRS, ("previous attribute was %s", _traceattr(previous_attr))); 111 112 if ((SP != 0) 113 && (magic_cookie_glitch > 0)) { 114 #if USE_XMC_SUPPORT 115 static chtype table[] = 116 { 117 A_STANDOUT, 118 A_UNDERLINE, 119 A_REVERSE, 120 A_BLINK, 121 A_DIM, 122 A_BOLD, 123 A_INVIS, 124 A_PROTECT, 125 }; 126 unsigned n; 127 int used = 0; 128 int limit = (max_attributes <= 0) ? 1 : max_attributes; 129 chtype retain = 0; 130 131 /* 132 * Limit the number of attribute bits set in the newmode according to 133 * the terminfo max_attributes value. 134 */ 135 for (n = 0; n < SIZEOF(table); ++n) { 136 if ((table[n] & SP->_ok_attributes) == 0) { 137 newmode &= ~table[n]; 138 } else if ((table[n] & newmode) != 0) { 139 if (used++ >= limit) { 140 newmode &= ~table[n]; 141 if (newmode == retain) 142 break; 143 } else { 144 retain = newmode; 145 } 146 } 147 } 148 #else 149 newmode &= ~(SP->_xmc_suppress); 150 #endif 151 TR(TRACE_ATTRS, ("suppressed attribute is %s", _traceattr(newmode))); 152 } 153 154 /* 155 * If we have a terminal that cannot combine color with video 156 * attributes, use the colors in preference. 157 */ 158 if (((newmode & A_COLOR) != 0 159 || fix_pair0) 160 && (no_color_video > 0)) { 161 /* 162 * If we had chosen the A_xxx definitions to correspond to the 163 * no_color_video mask, we could simply shift it up and mask off the 164 * attributes. But we did not (actually copied Solaris' definitions). 165 * However, this is still simpler/faster than a lookup table. 166 * 167 * The 63 corresponds to A_STANDOUT, A_UNDERLINE, A_REVERSE, A_BLINK, 168 * A_DIM, A_BOLD which are 1:1 with no_color_video. The bits that 169 * correspond to A_INVIS, A_PROTECT (192) must be shifted up 1 and 170 * A_ALTCHARSET (256) down 2 to line up. We use the NCURSES_BITS 171 * macro so this will work properly for the wide-character layout. 172 */ 173 unsigned value = no_color_video; 174 attr_t mask = NCURSES_BITS((value & 63) 175 | ((value & 192) << 1) 176 | ((value & 256) >> 2), 8); 177 178 if ((mask & A_REVERSE) != 0 179 && (newmode & A_REVERSE) != 0) { 180 reverse = TRUE; 181 mask &= ~A_REVERSE; 182 } 183 newmode &= ~mask; 184 } 185 186 if (newmode == previous_attr) 187 returnCode(OK); 188 189 pair = PAIR_NUMBER(newmode); 190 191 if (reverse) { 192 newmode &= ~A_REVERSE; 193 } 194 195 turn_off = (~newmode & previous_attr) & ALL_BUT_COLOR; 196 turn_on = (newmode & ~previous_attr) & ALL_BUT_COLOR; 197 198 SetColorsIf(((pair == 0) && !fix_pair0), previous_attr); 199 200 if (newmode == A_NORMAL) { 201 if ((previous_attr & A_ALTCHARSET) && exit_alt_charset_mode) { 202 doPut(exit_alt_charset_mode); 203 previous_attr &= ~A_ALTCHARSET; 204 } 205 if (previous_attr) { 206 if (exit_attribute_mode) { 207 doPut(exit_attribute_mode); 208 } else { 209 if (!SP || SP->_use_rmul) { 210 TurnOff(A_UNDERLINE, exit_underline_mode); 211 } 212 if (!SP || SP->_use_rmso) { 213 TurnOff(A_STANDOUT, exit_standout_mode); 214 } 215 } 216 previous_attr &= ALL_BUT_COLOR; 217 } 218 219 SetColorsIf((pair != 0) || fix_pair0, previous_attr); 220 } else if (set_attributes) { 221 if (turn_on || turn_off) { 222 TPUTS_TRACE("set_attributes"); 223 tputs(tparm(set_attributes, 224 (newmode & A_STANDOUT) != 0, 225 (newmode & A_UNDERLINE) != 0, 226 (newmode & A_REVERSE) != 0, 227 (newmode & A_BLINK) != 0, 228 (newmode & A_DIM) != 0, 229 (newmode & A_BOLD) != 0, 230 (newmode & A_INVIS) != 0, 231 (newmode & A_PROTECT) != 0, 232 (newmode & A_ALTCHARSET) != 0), 1, outc); 233 previous_attr &= ALL_BUT_COLOR; 234 } 235 SetColorsIf((pair != 0) || fix_pair0, previous_attr); 236 } else { 237 238 TR(TRACE_ATTRS, ("turning %s off", _traceattr(turn_off))); 239 240 TurnOff(A_ALTCHARSET, exit_alt_charset_mode); 241 242 if (!SP || SP->_use_rmul) { 243 TurnOff(A_UNDERLINE, exit_underline_mode); 244 } 245 246 if (!SP || SP->_use_rmso) { 247 TurnOff(A_STANDOUT, exit_standout_mode); 248 } 249 250 if (turn_off && exit_attribute_mode) { 251 doPut(exit_attribute_mode); 252 turn_on |= (newmode & ALL_BUT_COLOR); 253 previous_attr &= ALL_BUT_COLOR; 254 } 255 SetColorsIf((pair != 0) || fix_pair0, previous_attr); 256 257 TR(TRACE_ATTRS, ("turning %s on", _traceattr(turn_on))); 258 /* *INDENT-OFF* */ 259 TurnOn(A_ALTCHARSET, enter_alt_charset_mode); 260 TurnOn(A_BLINK, enter_blink_mode); 261 TurnOn(A_BOLD, enter_bold_mode); 262 TurnOn(A_DIM, enter_dim_mode); 263 TurnOn(A_REVERSE, enter_reverse_mode); 264 TurnOn(A_STANDOUT, enter_standout_mode); 265 TurnOn(A_PROTECT, enter_protected_mode); 266 TurnOn(A_INVIS, enter_secure_mode); 267 TurnOn(A_UNDERLINE, enter_underline_mode); 268 #if USE_WIDEC_SUPPORT 269 TurnOn(A_HORIZONTAL, enter_horizontal_hl_mode); 270 TurnOn(A_LEFT, enter_left_hl_mode); 271 TurnOn(A_LOW, enter_low_hl_mode); 272 TurnOn(A_RIGHT, enter_right_hl_mode); 273 TurnOn(A_TOP, enter_top_hl_mode); 274 TurnOn(A_VERTICAL, enter_vertical_hl_mode); 275 #endif 276 /* *INDENT-ON* */ 277 278 } 279 280 if (reverse) 281 newmode |= A_REVERSE; 282 283 if (SP) 284 SetAttr(SCREEN_ATTRS(SP), newmode); 285 else 286 previous_attr = newmode; 287 288 returnCode(OK); 289 } 290 291 NCURSES_EXPORT(int) 292 vidattr(chtype newmode) 293 { 294 T((T_CALLED("vidattr(%s)"), _traceattr(newmode))); 295 296 returnCode(vidputs(newmode, _nc_outch)); 297 } 298 299 NCURSES_EXPORT(chtype) 300 termattrs(void) 301 { 302 chtype attrs = A_NORMAL; 303 304 T((T_CALLED("termattrs()"))); 305 if (enter_alt_charset_mode) 306 attrs |= A_ALTCHARSET; 307 308 if (enter_blink_mode) 309 attrs |= A_BLINK; 310 311 if (enter_bold_mode) 312 attrs |= A_BOLD; 313 314 if (enter_dim_mode) 315 attrs |= A_DIM; 316 317 if (enter_reverse_mode) 318 attrs |= A_REVERSE; 319 320 if (enter_standout_mode) 321 attrs |= A_STANDOUT; 322 323 if (enter_protected_mode) 324 attrs |= A_PROTECT; 325 326 if (enter_secure_mode) 327 attrs |= A_INVIS; 328 329 if (enter_underline_mode) 330 attrs |= A_UNDERLINE; 331 332 if (SP->_coloron) 333 attrs |= A_COLOR; 334 335 returnChar(attrs); 336 } 337