1 /**************************************************************************** 2 * Copyright (c) 1998,1999,2000 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 ****************************************************************************/ 33 34 /* 35 * vidputs(newmode, outc) 36 * 37 * newmode is taken to be the logical 'or' of the symbols in curses.h 38 * representing graphic renditions. The terminal is set to be in all of 39 * the given modes, if possible. 40 * 41 * if the new attribute is normal 42 * if exit-alt-char-set exists 43 * emit it 44 * emit exit-attribute-mode 45 * else if set-attributes exists 46 * use it to set exactly what you want 47 * else 48 * if exit-attribute-mode exists 49 * turn off everything 50 * else 51 * turn off those which can be turned off and aren't in 52 * newmode. 53 * turn on each mode which should be on and isn't, one by one 54 * 55 * NOTE that this algorithm won't achieve the desired mix of attributes 56 * in some cases, but those are probably just those cases in which it is 57 * actually impossible, anyway, so... 58 * 59 * NOTE that we cannot assume that there's no interaction between color 60 * and other attribute resets. So each time we reset color (or other 61 * attributes) we'll have to be prepared to restore the other. 62 */ 63 64 #include <curses.priv.h> 65 #include <term.h> 66 67 MODULE_ID("$Id: lib_vidattr.c,v 1.36 2000/12/10 03:05:48 tom Exp $") 68 69 #define doPut(mode) TPUTS_TRACE(#mode); tputs(mode, 1, outc) 70 71 #define TurnOn(mask,mode) \ 72 if ((turn_on & mask) && mode) { doPut(mode); } 73 74 #define TurnOff(mask,mode) \ 75 if ((turn_off & mask) && mode) { doPut(mode); turn_off &= ~mask; } 76 77 /* if there is no current screen, assume we *can* do color */ 78 #define SetColorsIf(why,old_attr) \ 79 if (can_color && (why)) { \ 80 int old_pair = PAIR_NUMBER(old_attr); \ 81 TR(TRACE_ATTRS, ("old pair = %d -- new pair = %d", old_pair, pair)); \ 82 if ((pair != old_pair) \ 83 || (fix_pair0 && (pair == 0)) \ 84 || (reverse ^ ((old_attr & A_REVERSE) != 0))) { \ 85 _nc_do_color(old_pair, pair, reverse, outc); \ 86 } \ 87 } 88 89 NCURSES_EXPORT(int) 90 vidputs 91 (attr_t 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 used_ncv = 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 T((T_CALLED("vidputs(%s)"), _traceattr(newmode))); 106 107 /* this allows us to go on whether or not newterm() has been called */ 108 if (SP) 109 previous_attr = SP->_current_attr; 110 111 TR(TRACE_ATTRS, ("previous attribute was %s", _traceattr(previous_attr))); 112 113 #if !USE_XMC_SUPPORT 114 if ((SP != 0) 115 && (magic_cookie_glitch > 0)) 116 newmode &= ~(SP->_xmc_suppress); 117 #endif 118 119 /* 120 * If we have a terminal that cannot combine color with video 121 * attributes, use the colors in preference. 122 */ 123 if (((newmode & A_COLOR) != 0 124 || fix_pair0) 125 && (no_color_video > 0)) { 126 /* 127 * If we had chosen the A_xxx definitions to correspond to the 128 * no_color_video mask, we could simply shift it up and mask off the 129 * attributes. But we did not (actually copied Solaris' definitions). 130 * However, this is still simpler/faster than a lookup table. 131 * 132 * The 63 corresponds to A_STANDOUT, A_UNDERLINE, A_REVERSE, A_BLINK, 133 * A_DIM, A_BOLD which are 1:1 with no_color_video. The bits that 134 * correspond to A_INVIS, A_PROTECT (192) must be shifted up 1 and 135 * A_ALTCHARSET (256) down 2 to line up. We use the NCURSES_BITS 136 * macro so this will work properly for the wide-character layout. 137 */ 138 unsigned value = no_color_video; 139 attr_t mask = NCURSES_BITS((value & 63) 140 | ((value & 192) << 1) 141 | ((value & 256) >> 2), 8); 142 143 if ((mask & A_REVERSE) != 0 144 && (newmode & A_REVERSE) != 0) { 145 reverse = TRUE; 146 mask &= ~A_REVERSE; 147 } 148 newmode &= ~mask; 149 } 150 151 if (newmode == previous_attr) 152 returnCode(OK); 153 154 pair = PAIR_NUMBER(newmode); 155 156 if (reverse) { 157 newmode &= ~A_REVERSE; 158 } 159 160 turn_off = (~newmode & previous_attr) & ALL_BUT_COLOR; 161 turn_on = (newmode & ~previous_attr) & ALL_BUT_COLOR; 162 163 SetColorsIf(((pair == 0) && !fix_pair0), previous_attr); 164 165 if (newmode == A_NORMAL) { 166 if ((previous_attr & A_ALTCHARSET) && exit_alt_charset_mode) { 167 doPut(exit_alt_charset_mode); 168 previous_attr &= ~A_ALTCHARSET; 169 } 170 if (previous_attr) { 171 if (exit_attribute_mode) { 172 doPut(exit_attribute_mode); 173 } else { 174 if (!SP || SP->_use_rmul) { 175 TurnOff(A_UNDERLINE, exit_underline_mode); 176 } 177 if (!SP || SP->_use_rmso) { 178 TurnOff(A_STANDOUT, exit_standout_mode); 179 } 180 } 181 previous_attr &= ~A_COLOR; 182 } 183 184 SetColorsIf((pair != 0) || fix_pair0, previous_attr); 185 } else if (set_attributes && !used_ncv) { 186 if (turn_on || turn_off) { 187 TPUTS_TRACE("set_attributes"); 188 tputs(tparm(set_attributes, 189 (newmode & A_STANDOUT) != 0, 190 (newmode & A_UNDERLINE) != 0, 191 (newmode & A_REVERSE) != 0, 192 (newmode & A_BLINK) != 0, 193 (newmode & A_DIM) != 0, 194 (newmode & A_BOLD) != 0, 195 (newmode & A_INVIS) != 0, 196 (newmode & A_PROTECT) != 0, 197 (newmode & A_ALTCHARSET) != 0), 1, outc); 198 previous_attr &= ~A_COLOR; 199 } 200 SetColorsIf((pair != 0) || fix_pair0, previous_attr); 201 } else { 202 203 TR(TRACE_ATTRS, ("turning %s off", _traceattr(turn_off))); 204 205 TurnOff(A_ALTCHARSET, exit_alt_charset_mode); 206 207 if (!SP || SP->_use_rmul) { 208 TurnOff(A_UNDERLINE, exit_underline_mode); 209 } 210 211 if (!SP || SP->_use_rmso) { 212 TurnOff(A_STANDOUT, exit_standout_mode); 213 } 214 215 if (turn_off && exit_attribute_mode) { 216 doPut(exit_attribute_mode); 217 turn_on |= (newmode & (chtype) (~A_COLOR)); 218 previous_attr &= ~A_COLOR; 219 } 220 SetColorsIf((pair != 0) || fix_pair0, previous_attr); 221 222 TR(TRACE_ATTRS, ("turning %s on", _traceattr(turn_on))); 223 /* *INDENT-OFF* */ 224 TurnOn(A_ALTCHARSET, enter_alt_charset_mode); 225 TurnOn(A_BLINK, enter_blink_mode); 226 TurnOn(A_BOLD, enter_bold_mode); 227 TurnOn(A_DIM, enter_dim_mode); 228 TurnOn(A_REVERSE, enter_reverse_mode); 229 TurnOn(A_STANDOUT, enter_standout_mode); 230 TurnOn(A_PROTECT, enter_protected_mode); 231 TurnOn(A_INVIS, enter_secure_mode); 232 TurnOn(A_UNDERLINE, enter_underline_mode); 233 TurnOn(A_HORIZONTAL, enter_horizontal_hl_mode); 234 TurnOn(A_LEFT, enter_left_hl_mode); 235 TurnOn(A_LOW, enter_low_hl_mode); 236 TurnOn(A_RIGHT, enter_right_hl_mode); 237 TurnOn(A_TOP, enter_top_hl_mode); 238 TurnOn(A_VERTICAL, enter_vertical_hl_mode); 239 /* *INDENT-ON* */ 240 241 } 242 243 if (reverse) 244 newmode |= A_REVERSE; 245 246 if (SP) 247 SP->_current_attr = newmode; 248 else 249 previous_attr = newmode; 250 251 returnCode(OK); 252 } 253 254 NCURSES_EXPORT(int) 255 vidattr(attr_t newmode) 256 { 257 T((T_CALLED("vidattr(%s)"), _traceattr(newmode))); 258 259 returnCode(vidputs(newmode, _nc_outch)); 260 } 261 262 NCURSES_EXPORT(chtype) 263 termattrs(void) 264 { 265 chtype attrs = A_NORMAL; 266 267 T((T_CALLED("termattrs()"))); 268 if (enter_alt_charset_mode) 269 attrs |= A_ALTCHARSET; 270 271 if (enter_blink_mode) 272 attrs |= A_BLINK; 273 274 if (enter_bold_mode) 275 attrs |= A_BOLD; 276 277 if (enter_dim_mode) 278 attrs |= A_DIM; 279 280 if (enter_reverse_mode) 281 attrs |= A_REVERSE; 282 283 if (enter_standout_mode) 284 attrs |= A_STANDOUT; 285 286 if (enter_protected_mode) 287 attrs |= A_PROTECT; 288 289 if (enter_secure_mode) 290 attrs |= A_INVIS; 291 292 if (enter_underline_mode) 293 attrs |= A_UNDERLINE; 294 295 if (SP->_coloron) 296 attrs |= A_COLOR; 297 298 returnChar(attrs); 299 } 300