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2 * Copyright (c) 1998,1999,2000,2001 Free Software Foundation, Inc. *
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5 * copy of this software and associated documentation files (the *
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27 ****************************************************************************/
29 /****************************************************************************
30 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
31 * and: Eric S. Raymond <esr@snark.thyrsus.com> *
32 ****************************************************************************/
35 * vidputs(newmode, outc)
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.
41 * if the new attribute is normal
42 * if exit-alt-char-set exists
44 * emit exit-attribute-mode
45 * else if set-attributes exists
46 * use it to set exactly what you want
48 * if exit-attribute-mode exists
51 * turn off those which can be turned off and aren't in
53 * turn on each mode which should be on and isn't, one by one
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...
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.
64 #include <curses.priv.h>
67 MODULE_ID("$Id: lib_vidattr.c,v 1.39 2001/08/26 00:40:46 Philippe.Blain Exp $")
69 #define doPut(mode) TPUTS_TRACE(#mode); tputs(mode, 1, outc)
71 #define TurnOn(mask,mode) \
72 if ((turn_on & mask) && mode) { doPut(mode); }
74 #define TurnOff(mask,mode) \
75 if ((turn_off & mask) && mode) { doPut(mode); turn_off &= ~mask; }
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); \
91 (chtype newmode, int (*outc) (int))
93 static attr_t previous_attr = A_NORMAL;
94 attr_t turn_on, turn_off;
97 bool can_color = (SP == 0 || SP->_coloron);
99 bool fix_pair0 = (SP != 0 && SP->_coloron && !SP->_default_color);
101 #define fix_pair0 FALSE
104 T((T_CALLED("vidputs(%s)"), _traceattr(newmode)));
106 /* this allows us to go on whether or not newterm() has been called */
108 previous_attr = SP->_current_attr;
110 TR(TRACE_ATTRS, ("previous attribute was %s", _traceattr(previous_attr)));
114 && (magic_cookie_glitch > 0))
115 newmode &= ~(SP->_xmc_suppress);
119 * If we have a terminal that cannot combine color with video
120 * attributes, use the colors in preference.
122 if (((newmode & A_COLOR) != 0
124 && (no_color_video > 0)) {
126 * If we had chosen the A_xxx definitions to correspond to the
127 * no_color_video mask, we could simply shift it up and mask off the
128 * attributes. But we did not (actually copied Solaris' definitions).
129 * However, this is still simpler/faster than a lookup table.
131 * The 63 corresponds to A_STANDOUT, A_UNDERLINE, A_REVERSE, A_BLINK,
132 * A_DIM, A_BOLD which are 1:1 with no_color_video. The bits that
133 * correspond to A_INVIS, A_PROTECT (192) must be shifted up 1 and
134 * A_ALTCHARSET (256) down 2 to line up. We use the NCURSES_BITS
135 * macro so this will work properly for the wide-character layout.
137 unsigned value = no_color_video;
138 attr_t mask = NCURSES_BITS((value & 63)
139 | ((value & 192) << 1)
140 | ((value & 256) >> 2), 8);
142 if ((mask & A_REVERSE) != 0
143 && (newmode & A_REVERSE) != 0) {
150 if (newmode == previous_attr)
153 pair = PAIR_NUMBER(newmode);
156 newmode &= ~A_REVERSE;
159 turn_off = (~newmode & previous_attr) & ALL_BUT_COLOR;
160 turn_on = (newmode & ~previous_attr) & ALL_BUT_COLOR;
162 SetColorsIf(((pair == 0) && !fix_pair0), previous_attr);
164 if (newmode == A_NORMAL) {
165 if ((previous_attr & A_ALTCHARSET) && exit_alt_charset_mode) {
166 doPut(exit_alt_charset_mode);
167 previous_attr &= ~A_ALTCHARSET;
170 if (exit_attribute_mode) {
171 doPut(exit_attribute_mode);
173 if (!SP || SP->_use_rmul) {
174 TurnOff(A_UNDERLINE, exit_underline_mode);
176 if (!SP || SP->_use_rmso) {
177 TurnOff(A_STANDOUT, exit_standout_mode);
180 previous_attr &= ~A_COLOR;
183 SetColorsIf((pair != 0) || fix_pair0, previous_attr);
184 } else if (set_attributes) {
185 if (turn_on || turn_off) {
186 TPUTS_TRACE("set_attributes");
187 tputs(tparm(set_attributes,
188 (newmode & A_STANDOUT) != 0,
189 (newmode & A_UNDERLINE) != 0,
190 (newmode & A_REVERSE) != 0,
191 (newmode & A_BLINK) != 0,
192 (newmode & A_DIM) != 0,
193 (newmode & A_BOLD) != 0,
194 (newmode & A_INVIS) != 0,
195 (newmode & A_PROTECT) != 0,
196 (newmode & A_ALTCHARSET) != 0), 1, outc);
197 previous_attr &= ~A_COLOR;
199 SetColorsIf((pair != 0) || fix_pair0, previous_attr);
202 TR(TRACE_ATTRS, ("turning %s off", _traceattr(turn_off)));
204 TurnOff(A_ALTCHARSET, exit_alt_charset_mode);
206 if (!SP || SP->_use_rmul) {
207 TurnOff(A_UNDERLINE, exit_underline_mode);
210 if (!SP || SP->_use_rmso) {
211 TurnOff(A_STANDOUT, exit_standout_mode);
214 if (turn_off && exit_attribute_mode) {
215 doPut(exit_attribute_mode);
216 turn_on |= (newmode & (chtype) (~A_COLOR));
217 previous_attr &= ~A_COLOR;
219 SetColorsIf((pair != 0) || fix_pair0, previous_attr);
221 TR(TRACE_ATTRS, ("turning %s on", _traceattr(turn_on)));
223 TurnOn(A_ALTCHARSET, enter_alt_charset_mode);
224 TurnOn(A_BLINK, enter_blink_mode);
225 TurnOn(A_BOLD, enter_bold_mode);
226 TurnOn(A_DIM, enter_dim_mode);
227 TurnOn(A_REVERSE, enter_reverse_mode);
228 TurnOn(A_STANDOUT, enter_standout_mode);
229 TurnOn(A_PROTECT, enter_protected_mode);
230 TurnOn(A_INVIS, enter_secure_mode);
231 TurnOn(A_UNDERLINE, enter_underline_mode);
232 #ifdef enter_horizontal_hl_mode
233 TurnOn(A_HORIZONTAL, enter_horizontal_hl_mode);
235 #ifdef enter_left_hl_mode
236 TurnOn(A_LEFT, enter_left_hl_mode);
238 #ifdef enter_low_hl_mode
239 TurnOn(A_LOW, enter_low_hl_mode);
241 #ifdef enter_right_hl_mode
242 TurnOn(A_RIGHT, enter_right_hl_mode);
244 #ifdef enter_top_hl_mode
245 TurnOn(A_TOP, enter_top_hl_mode);
247 #ifdef enter_vertical_hl_mode
248 TurnOn(A_VERTICAL, enter_vertical_hl_mode);
255 newmode |= A_REVERSE;
258 SP->_current_attr = newmode;
260 previous_attr = newmode;
266 vidattr(chtype newmode)
268 T((T_CALLED("vidattr(%s)"), _traceattr(newmode)));
270 returnCode(vidputs(newmode, _nc_outch));
273 NCURSES_EXPORT(chtype)
276 chtype attrs = A_NORMAL;
278 T((T_CALLED("termattrs()")));
279 if (enter_alt_charset_mode)
280 attrs |= A_ALTCHARSET;
282 if (enter_blink_mode)
291 if (enter_reverse_mode)
294 if (enter_standout_mode)
297 if (enter_protected_mode)
300 if (enter_secure_mode)
303 if (enter_underline_mode)
304 attrs |= A_UNDERLINE;