ncurses-4.2-990116

1 files changed, 273 insertions, 0 deletions

diff --git a/lib/libcurses/tty/lib_vidattr.c b/lib/libcurses/tty/lib_vidattr.c
new file mode 100644
index 00000000000..b148877d992
--- /dev/null
+++ b/lib/libcurses/tty/lib_vidattr.c
@@ -0,0 +1,273 @@
+/*	$OpenBSD: lib_vidattr.c,v 1.1 1999/01/18 19:10:27 millert Exp $	*/
+
+/****************************************************************************
+ * Copyright (c) 1998 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>                         *
+ ****************************************************************************/
+
+/*
+ *	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("$From: lib_vidattr.c,v 1.21 1998/08/01 22:21:19 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 ((!SP || SP->_coloron) && (why)) { \
+		int old_pair = PAIR_NUMBER(old_attr); \
+		T(("old pair = %d -- new pair = %d", old_pair, pair)); \
+		if ((pair != old_pair) \
+		 || (reverse ^ ((old_attr & A_REVERSE) != 0))) { \
+			_nc_do_color(pair, reverse, outc); \
+		} \
+	}
+
+int vidputs(attr_t newmode, int  (*outc)(int))
+{
+static attr_t previous_attr = A_NORMAL;
+attr_t turn_on, turn_off;
+int pair;
+bool reverse = FALSE;
+bool used_ncv = FALSE;
+
+	T((T_CALLED("vidputs(%s)"), _traceattr(newmode)));
+
+	/* this allows us to go on whether or not newterm() has been called */
+	if (SP)
+		previous_attr = SP->_current_attr;
+
+	T(("previous attribute was %s", _traceattr(previous_attr)));
+
+#if !USE_XMC_SUPPORT
+	if (magic_cookie_glitch > 0)
+		newmode &= ~(SP->_xmc_suppress);
+#endif
+
+	/*
+	 * If we have a terminal that cannot combine color with video
+	 * attributes, use the colors in preference.
+	 */
+	if ((newmode & A_COLOR)
+	 && (no_color_video > 0)) {
+		static const struct {
+			attr_t video;
+			unsigned bit;
+		} table[] = {
+			{ A_STANDOUT,		1 },
+			{ A_UNDERLINE,		2 },
+			{ A_REVERSE,		4 },
+			{ A_BLINK,		8 },
+			{ A_DIM,		16 },
+			{ A_BOLD, 		32 },
+			{ A_INVIS,		64 },
+			{ A_PROTECT,		128 },
+			{ A_ALTCHARSET,		256 },
+		};
+		size_t n;
+		for (n = 0; n < SIZEOF(table); n++) {
+			if ((table[n].bit & no_color_video)
+			 && (table[n].video & newmode)) {
+				used_ncv = TRUE;
+				if (table[n].video == A_REVERSE)
+					reverse = TRUE;
+				else
+					newmode &= ~table[n].video;
+			}
+		}
+	}
+
+	if (newmode == previous_attr)
+		returnCode(OK);
+
+	pair = PAIR_NUMBER(newmode);
+
+	if (reverse) {
+		newmode &= ~A_REVERSE;
+	}
+
+	turn_off = (~newmode & previous_attr) & ALL_BUT_COLOR;
+	turn_on  = (newmode & ~previous_attr) & ALL_BUT_COLOR;
+
+	SetColorsIf(pair == 0, previous_attr);
+
+	if (newmode == A_NORMAL) {
+		if((previous_attr & A_ALTCHARSET) && exit_alt_charset_mode) {
+			doPut(exit_alt_charset_mode);
+			previous_attr &= ~A_ALTCHARSET;
+		}
+		if (previous_attr) {
+			doPut(exit_attribute_mode);
+			previous_attr &= ~A_COLOR;
+		}
+
+		SetColorsIf(pair != 0, previous_attr);
+	} else if (set_attributes && !used_ncv) {
+		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);
+			previous_attr &= ~A_COLOR;
+		}
+		SetColorsIf(pair != 0, previous_attr);
+	} else {
+
+		T(("turning %s off", _traceattr(turn_off)));
+
+		TurnOff(A_ALTCHARSET,  exit_alt_charset_mode);
+		TurnOff(A_UNDERLINE,   exit_underline_mode);
+		TurnOff(A_STANDOUT,    exit_standout_mode);
+
+		if (turn_off && exit_attribute_mode) {
+			doPut(exit_attribute_mode);
+			turn_on  |= (newmode & (chtype)(~A_COLOR));
+			previous_attr &= ~A_COLOR;
+		}
+		SetColorsIf(pair != 0, previous_attr);
+
+		T(("turning %s on", _traceattr(turn_on)));
+
+		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);
+		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);
+	}
+
+	if (reverse)
+		newmode |= A_REVERSE;
+
+	if (SP)
+		SP->_current_attr = newmode;
+	else
+		previous_attr = newmode;
+
+	returnCode(OK);
+}
+
+int vidattr(attr_t newmode)
+{
+	T((T_CALLED("vidattr(%s)"), _traceattr(newmode)));
+
+	returnCode(vidputs(newmode, _nc_outch));
+}
+
+chtype termattrs(void)
+{
+	chtype attrs = A_NORMAL;
+
+	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;
+
+	return(attrs);
+}
+