Amit Daniel Kachhap | e6a01f5 | 2011-07-20 11:45:59 +0530 | [diff] [blame] | 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 | } |