1 /* $OpenBSD: lib_vidattr.c,v 1.8 2001/01/22 18:02:00 millert Exp $ */ 2 3 /**************************************************************************** 4 * Copyright (c) 1998,1999,2000 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 ****************************************************************************/ 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 #include <term.h> 68 69 MODULE_ID("$From: lib_vidattr.c,v 1.36 2000/12/10 03:05:48 tom Exp $") 70 71 #define doPut(mode) TPUTS_TRACE(#mode); tputs(mode, 1, outc) 72 73 #define TurnOn(mask,mode) \ 74 if ((turn_on & mask) && mode) { doPut(mode); } 75 76 #define TurnOff(mask,mode) \ 77 if ((turn_off & mask) && mode) { doPut(mode); turn_off &= ~mask; } 78 79 /* if there is no current screen, assume we *can* do color */ 80 #define SetColorsIf(why,old_attr) \ 81 if (can_color && (why)) { \ 82 int old_pair = PAIR_NUMBER(old_attr); \ 83 TR(TRACE_ATTRS, ("old pair = %d -- new pair = %d", old_pair, pair)); \ 84 if ((pair != old_pair) \ 85 || (fix_pair0 && (pair == 0)) \ 86 || (reverse ^ ((old_attr & A_REVERSE) != 0))) { \ 87 _nc_do_color(old_pair, pair, reverse, outc); \ 88 } \ 89 } 90 91 NCURSES_EXPORT(int) 92 vidputs 93 (attr_t newmode, int (*outc) (int)) 94 { 95 static attr_t previous_attr = A_NORMAL; 96 attr_t turn_on, turn_off; 97 int pair; 98 bool reverse = FALSE; 99 bool used_ncv = 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 T((T_CALLED("vidputs(%s)"), _traceattr(newmode))); 108 109 /* this allows us to go on whether or not newterm() has been called */ 110 if (SP) 111 previous_attr = SP->_current_attr; 112 113 TR(TRACE_ATTRS, ("previous attribute was %s", _traceattr(previous_attr))); 114 115 #if !USE_XMC_SUPPORT 116 if ((SP != 0) 117 && (magic_cookie_glitch > 0)) 118 newmode &= ~(SP->_xmc_suppress); 119 #endif 120 121 /* 122 * If we have a terminal that cannot combine color with video 123 * attributes, use the colors in preference. 124 */ 125 if (((newmode & A_COLOR) != 0 126 || fix_pair0) 127 && (no_color_video > 0)) { 128 /* 129 * If we had chosen the A_xxx definitions to correspond to the 130 * no_color_video mask, we could simply shift it up and mask off the 131 * attributes. But we did not (actually copied Solaris' definitions). 132 * However, this is still simpler/faster than a lookup table. 133 * 134 * The 63 corresponds to A_STANDOUT, A_UNDERLINE, A_REVERSE, A_BLINK, 135 * A_DIM, A_BOLD which are 1:1 with no_color_video. The bits that 136 * correspond to A_INVIS, A_PROTECT (192) must be shifted up 1 and 137 * A_ALTCHARSET (256) down 2 to line up. We use the NCURSES_BITS 138 * macro so this will work properly for the wide-character layout. 139 */ 140 unsigned value = no_color_video; 141 attr_t mask = NCURSES_BITS((value & 63) 142 | ((value & 192) << 1) 143 | ((value & 256) >> 2), 8); 144 145 if ((mask & A_REVERSE) != 0 146 && (newmode & A_REVERSE) != 0) { 147 reverse = TRUE; 148 mask &= ~A_REVERSE; 149 } 150 newmode &= ~mask; 151 } 152 153 if (newmode == previous_attr) 154 returnCode(OK); 155 156 pair = PAIR_NUMBER(newmode); 157 158 if (reverse) { 159 newmode &= ~A_REVERSE; 160 } 161 162 turn_off = (~newmode & previous_attr) & ALL_BUT_COLOR; 163 turn_on = (newmode & ~previous_attr) & ALL_BUT_COLOR; 164 165 SetColorsIf(((pair == 0) && !fix_pair0), previous_attr); 166 167 if (newmode == A_NORMAL) { 168 if ((previous_attr & A_ALTCHARSET) && exit_alt_charset_mode) { 169 doPut(exit_alt_charset_mode); 170 previous_attr &= ~A_ALTCHARSET; 171 } 172 if (previous_attr) { 173 if (exit_attribute_mode) { 174 doPut(exit_attribute_mode); 175 } else { 176 if (!SP || SP->_use_rmul) { 177 TurnOff(A_UNDERLINE, exit_underline_mode); 178 } 179 if (!SP || SP->_use_rmso) { 180 TurnOff(A_STANDOUT, exit_standout_mode); 181 } 182 } 183 previous_attr &= ~A_COLOR; 184 } 185 186 SetColorsIf((pair != 0) || fix_pair0, previous_attr); 187 } else if (set_attributes && !used_ncv) { 188 if (turn_on || turn_off) { 189 TPUTS_TRACE("set_attributes"); 190 tputs(tparm(set_attributes, 191 (newmode & A_STANDOUT) != 0, 192 (newmode & A_UNDERLINE) != 0, 193 (newmode & A_REVERSE) != 0, 194 (newmode & A_BLINK) != 0, 195 (newmode & A_DIM) != 0, 196 (newmode & A_BOLD) != 0, 197 (newmode & A_INVIS) != 0, 198 (newmode & A_PROTECT) != 0, 199 (newmode & A_ALTCHARSET) != 0), 1, outc); 200 previous_attr &= ~A_COLOR; 201 } 202 SetColorsIf((pair != 0) || fix_pair0, previous_attr); 203 } else { 204 205 TR(TRACE_ATTRS, ("turning %s off", _traceattr(turn_off))); 206 207 TurnOff(A_ALTCHARSET, exit_alt_charset_mode); 208 209 if (!SP || SP->_use_rmul) { 210 TurnOff(A_UNDERLINE, exit_underline_mode); 211 } 212 213 if (!SP || SP->_use_rmso) { 214 TurnOff(A_STANDOUT, exit_standout_mode); 215 } 216 217 if (turn_off && exit_attribute_mode) { 218 doPut(exit_attribute_mode); 219 turn_on |= (newmode & (chtype) (~A_COLOR)); 220 previous_attr &= ~A_COLOR; 221 } 222 SetColorsIf((pair != 0) || fix_pair0, previous_attr); 223 224 TR(TRACE_ATTRS, ("turning %s on", _traceattr(turn_on))); 225 /* *INDENT-OFF* */ 226 TurnOn(A_ALTCHARSET, enter_alt_charset_mode); 227 TurnOn(A_BLINK, enter_blink_mode); 228 TurnOn(A_BOLD, enter_bold_mode); 229 TurnOn(A_DIM, enter_dim_mode); 230 TurnOn(A_REVERSE, enter_reverse_mode); 231 TurnOn(A_STANDOUT, enter_standout_mode); 232 TurnOn(A_PROTECT, enter_protected_mode); 233 TurnOn(A_INVIS, enter_secure_mode); 234 TurnOn(A_UNDERLINE, enter_underline_mode); 235 TurnOn(A_HORIZONTAL, enter_horizontal_hl_mode); 236 TurnOn(A_LEFT, enter_left_hl_mode); 237 TurnOn(A_LOW, enter_low_hl_mode); 238 TurnOn(A_RIGHT, enter_right_hl_mode); 239 TurnOn(A_TOP, enter_top_hl_mode); 240 TurnOn(A_VERTICAL, enter_vertical_hl_mode); 241 /* *INDENT-ON* */ 242 243 } 244 245 if (reverse) 246 newmode |= A_REVERSE; 247 248 if (SP) 249 SP->_current_attr = newmode; 250 else 251 previous_attr = newmode; 252 253 returnCode(OK); 254 } 255 256 NCURSES_EXPORT(int) 257 vidattr(attr_t newmode) 258 { 259 T((T_CALLED("vidattr(%s)"), _traceattr(newmode))); 260 261 returnCode(vidputs(newmode, _nc_outch)); 262 } 263 264 NCURSES_EXPORT(chtype) 265 termattrs(void) 266 { 267 chtype attrs = A_NORMAL; 268 269 T((T_CALLED("termattrs()"))); 270 if (enter_alt_charset_mode) 271 attrs |= A_ALTCHARSET; 272 273 if (enter_blink_mode) 274 attrs |= A_BLINK; 275 276 if (enter_bold_mode) 277 attrs |= A_BOLD; 278 279 if (enter_dim_mode) 280 attrs |= A_DIM; 281 282 if (enter_reverse_mode) 283 attrs |= A_REVERSE; 284 285 if (enter_standout_mode) 286 attrs |= A_STANDOUT; 287 288 if (enter_protected_mode) 289 attrs |= A_PROTECT; 290 291 if (enter_secure_mode) 292 attrs |= A_INVIS; 293 294 if (enter_underline_mode) 295 attrs |= A_UNDERLINE; 296 297 if (SP->_coloron) 298 attrs |= A_COLOR; 299 300 returnChar(attrs); 301 } 302