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+/****************************************************************************
+ * Copyright (c) 1998-2006,2007 Free Software Foundation, Inc. *
+ * *
+ * Permission is hereby granted, free of charge, to any person obtaining a *
+ * copy of this software and associated documentation files (the *
+ * "Software"), to deal in the Software without restriction, including *
+ * without limitation the rights to use, copy, modify, merge, publish, *
+ * distribute, distribute with modifications, sublicense, and/or sell *
+ * copies of the Software, and to permit persons to whom the Software is *
+ * furnished to do so, subject to the following conditions: *
+ * *
+ * The above copyright notice and this permission notice shall be included *
+ * in all copies or substantial portions of the Software. *
+ * *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
+ * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
+ * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
+ * *
+ * Except as contained in this notice, the name(s) of the above copyright *
+ * holders shall not be used in advertising or otherwise to promote the *
+ * sale, use or other dealings in this Software without prior written *
+ * authorization. *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
+ * and: Eric S. Raymond <esr@snark.thyrsus.com> *
+ * and: Thomas E. Dickey 1996 on *
+ ****************************************************************************/
+
+/*
+ * vidputs(newmode, outc)
+ *
+ * newmode is taken to be the logical 'or' of the symbols in curses.h
+ * representing graphic renditions. The terminal is set to be in all of
+ * the given modes, if possible.
+ *
+ * if the new attribute is normal
+ * if exit-alt-char-set exists
+ * emit it
+ * emit exit-attribute-mode
+ * else if set-attributes exists
+ * use it to set exactly what you want
+ * else
+ * if exit-attribute-mode exists
+ * turn off everything
+ * else
+ * turn off those which can be turned off and aren't in
+ * newmode.
+ * turn on each mode which should be on and isn't, one by one
+ *
+ * NOTE that this algorithm won't achieve the desired mix of attributes
+ * in some cases, but those are probably just those cases in which it is
+ * actually impossible, anyway, so...
+ *
+ * NOTE that we cannot assume that there's no interaction between color
+ * and other attribute resets. So each time we reset color (or other
+ * attributes) we'll have to be prepared to restore the other.
+ */
+
+#include <curses.priv.h>
+#include <term.h>
+
+MODULE_ID("$Id: lib_vidattr.c,v 1.49 2007/06/30 21:58:04 tom Exp $")
+
+#define doPut(mode) TPUTS_TRACE(#mode); tputs(mode, 1, outc)
+
+#define TurnOn(mask,mode) \
+ if ((turn_on & mask) && mode) { doPut(mode); }
+
+#define TurnOff(mask,mode) \
+ if ((turn_off & mask) && mode) { doPut(mode); turn_off &= ~mask; }
+
+ /* if there is no current screen, assume we *can* do color */
+#define SetColorsIf(why,old_attr) \
+ if (can_color && (why)) { \
+ int old_pair = PAIR_NUMBER(old_attr); \
+ TR(TRACE_ATTRS, ("old pair = %d -- new pair = %d", old_pair, pair)); \
+ if ((pair != old_pair) \
+ || (fix_pair0 && (pair == 0)) \
+ || (reverse ^ ((old_attr & A_REVERSE) != 0))) { \
+ _nc_do_color(old_pair, pair, reverse, outc); \
+ } \
+ }
+
+#define PreviousAttr _nc_prescreen.previous_attr
+
+NCURSES_EXPORT(int)
+vidputs(chtype newmode, int (*outc) (int))
+{
+ attr_t turn_on, turn_off;
+ int pair;
+ bool reverse = FALSE;
+ bool can_color = (SP == 0 || SP->_coloron);
+#if NCURSES_EXT_FUNCS
+ bool fix_pair0 = (SP != 0 && SP->_coloron && !SP->_default_color);
+#else
+#define fix_pair0 FALSE
+#endif
+
+ newmode &= A_ATTRIBUTES;
+ T((T_CALLED("vidputs(%s)"), _traceattr(newmode)));
+
+ /* this allows us to go on whether or not newterm() has been called */
+ if (SP)
+ PreviousAttr = AttrOf(SCREEN_ATTRS(SP));
+
+ TR(TRACE_ATTRS, ("previous attribute was %s", _traceattr(PreviousAttr)));
+
+ if ((SP != 0)
+ && (magic_cookie_glitch > 0)) {
+#if USE_XMC_SUPPORT
+ static const chtype table[] =
+ {
+ A_STANDOUT,
+ A_UNDERLINE,
+ A_REVERSE,
+ A_BLINK,
+ A_DIM,
+ A_BOLD,
+ A_INVIS,
+ A_PROTECT,
+ };
+ unsigned n;
+ int used = 0;
+ int limit = (max_attributes <= 0) ? 1 : max_attributes;
+ chtype retain = 0;
+
+ /*
+ * Limit the number of attribute bits set in the newmode according to
+ * the terminfo max_attributes value.
+ */
+ for (n = 0; n < SIZEOF(table); ++n) {
+ if ((table[n] & SP->_ok_attributes) == 0) {
+ newmode &= ~table[n];
+ } else if ((table[n] & newmode) != 0) {
+ if (used++ >= limit) {
+ newmode &= ~table[n];
+ if (newmode == retain)
+ break;
+ } else {
+ retain = newmode;
+ }
+ }
+ }
+#else
+ newmode &= ~(SP->_xmc_suppress);
+#endif
+ TR(TRACE_ATTRS, ("suppressed attribute is %s", _traceattr(newmode)));
+ }
+
+ /*
+ * If we have a terminal that cannot combine color with video
+ * attributes, use the colors in preference.
+ */
+ if (((newmode & A_COLOR) != 0
+ || fix_pair0)
+ && (no_color_video > 0)) {
+ /*
+ * If we had chosen the A_xxx definitions to correspond to the
+ * no_color_video mask, we could simply shift it up and mask off the
+ * attributes. But we did not (actually copied Solaris' definitions).
+ * However, this is still simpler/faster than a lookup table.
+ *
+ * The 63 corresponds to A_STANDOUT, A_UNDERLINE, A_REVERSE, A_BLINK,
+ * A_DIM, A_BOLD which are 1:1 with no_color_video. The bits that
+ * correspond to A_INVIS, A_PROTECT (192) must be shifted up 1 and
+ * A_ALTCHARSET (256) down 2 to line up. We use the NCURSES_BITS
+ * macro so this will work properly for the wide-character layout.
+ */
+ unsigned value = no_color_video;
+ attr_t mask = NCURSES_BITS((value & 63)
+ | ((value & 192) << 1)
+ | ((value & 256) >> 2), 8);
+
+ if ((mask & A_REVERSE) != 0
+ && (newmode & A_REVERSE) != 0) {
+ reverse = TRUE;
+ mask &= ~A_REVERSE;
+ }
+ newmode &= ~mask;
+ }
+
+ if (newmode == PreviousAttr)
+ returnCode(OK);
+
+ pair = PAIR_NUMBER(newmode);
+
+ if (reverse) {
+ newmode &= ~A_REVERSE;
+ }
+
+ turn_off = (~newmode & PreviousAttr) & ALL_BUT_COLOR;
+ turn_on = (newmode & ~PreviousAttr) & ALL_BUT_COLOR;
+
+ SetColorsIf(((pair == 0) && !fix_pair0), PreviousAttr);
+
+ if (newmode == A_NORMAL) {
+ if ((PreviousAttr & A_ALTCHARSET) && exit_alt_charset_mode) {
+ doPut(exit_alt_charset_mode);
+ PreviousAttr &= ~A_ALTCHARSET;
+ }
+ if (PreviousAttr) {
+ if (exit_attribute_mode) {
+ doPut(exit_attribute_mode);
+ } else {
+ if (!SP || SP->_use_rmul) {
+ TurnOff(A_UNDERLINE, exit_underline_mode);
+ }
+ if (!SP || SP->_use_rmso) {
+ TurnOff(A_STANDOUT, exit_standout_mode);
+ }
+ }
+ PreviousAttr &= ALL_BUT_COLOR;
+ }
+
+ SetColorsIf((pair != 0) || fix_pair0, PreviousAttr);
+ } else if (set_attributes) {
+ if (turn_on || turn_off) {
+ TPUTS_TRACE("set_attributes");
+ tputs(tparm(set_attributes,
+ (newmode & A_STANDOUT) != 0,
+ (newmode & A_UNDERLINE) != 0,
+ (newmode & A_REVERSE) != 0,
+ (newmode & A_BLINK) != 0,
+ (newmode & A_DIM) != 0,
+ (newmode & A_BOLD) != 0,
+ (newmode & A_INVIS) != 0,
+ (newmode & A_PROTECT) != 0,
+ (newmode & A_ALTCHARSET) != 0), 1, outc);
+ PreviousAttr &= ALL_BUT_COLOR;
+ }
+ SetColorsIf((pair != 0) || fix_pair0, PreviousAttr);
+ } else {
+
+ TR(TRACE_ATTRS, ("turning %s off", _traceattr(turn_off)));
+
+ TurnOff(A_ALTCHARSET, exit_alt_charset_mode);
+
+ if (!SP || SP->_use_rmul) {
+ TurnOff(A_UNDERLINE, exit_underline_mode);
+ }
+
+ if (!SP || SP->_use_rmso) {
+ TurnOff(A_STANDOUT, exit_standout_mode);
+ }
+
+ if (turn_off && exit_attribute_mode) {
+ doPut(exit_attribute_mode);
+ turn_on |= (newmode & ALL_BUT_COLOR);
+ PreviousAttr &= ALL_BUT_COLOR;
+ }
+ SetColorsIf((pair != 0) || fix_pair0, PreviousAttr);
+
+ TR(TRACE_ATTRS, ("turning %s on", _traceattr(turn_on)));
+ /* *INDENT-OFF* */
+ TurnOn(A_ALTCHARSET, enter_alt_charset_mode);
+ TurnOn(A_BLINK, enter_blink_mode);
+ TurnOn(A_BOLD, enter_bold_mode);
+ TurnOn(A_DIM, enter_dim_mode);
+ TurnOn(A_REVERSE, enter_reverse_mode);
+ TurnOn(A_STANDOUT, enter_standout_mode);
+ TurnOn(A_PROTECT, enter_protected_mode);
+ TurnOn(A_INVIS, enter_secure_mode);
+ TurnOn(A_UNDERLINE, enter_underline_mode);
+#if USE_WIDEC_SUPPORT
+ TurnOn(A_HORIZONTAL, enter_horizontal_hl_mode);
+ TurnOn(A_LEFT, enter_left_hl_mode);
+ TurnOn(A_LOW, enter_low_hl_mode);
+ TurnOn(A_RIGHT, enter_right_hl_mode);
+ TurnOn(A_TOP, enter_top_hl_mode);
+ TurnOn(A_VERTICAL, enter_vertical_hl_mode);
+#endif
+ /* *INDENT-ON* */
+
+ }
+
+ if (reverse)
+ newmode |= A_REVERSE;
+
+ if (SP)
+ SetAttr(SCREEN_ATTRS(SP), newmode);
+ else
+ PreviousAttr = newmode;
+
+ returnCode(OK);
+}
+
+NCURSES_EXPORT(int)
+vidattr(chtype newmode)
+{
+ T((T_CALLED("vidattr(%s)"), _traceattr(newmode)));
+
+ returnCode(vidputs(newmode, _nc_outch));
+}
+
+NCURSES_EXPORT(chtype)
+termattrs(void)
+{
+ chtype attrs = A_NORMAL;
+
+ T((T_CALLED("termattrs()")));
+ if (enter_alt_charset_mode)
+ attrs |= A_ALTCHARSET;
+
+ if (enter_blink_mode)
+ attrs |= A_BLINK;
+
+ if (enter_bold_mode)
+ attrs |= A_BOLD;
+
+ if (enter_dim_mode)
+ attrs |= A_DIM;
+
+ if (enter_reverse_mode)
+ attrs |= A_REVERSE;
+
+ if (enter_standout_mode)
+ attrs |= A_STANDOUT;
+
+ if (enter_protected_mode)
+ attrs |= A_PROTECT;
+
+ if (enter_secure_mode)
+ attrs |= A_INVIS;
+
+ if (enter_underline_mode)
+ attrs |= A_UNDERLINE;
+
+ if (SP->_coloron)
+ attrs |= A_COLOR;
+
+ returnChar(attrs);
+}