GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcurses/tty/lib_vidattr.c Lines: 0 105 0.0 %
Date: 2017-11-13 Branches: 0 210 0.0 %

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/* $OpenBSD: lib_vidattr.c,v 1.9 2010/01/12 23:22:07 nicm Exp $ */
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/****************************************************************************
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 * Copyright (c) 1998-2006,2007 Free Software Foundation, Inc.              *
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 *                                                                          *
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 * Permission is hereby granted, free of charge, to any person obtaining a  *
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 * copy of this software and associated documentation files (the            *
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 * "Software"), to deal in the Software without restriction, including      *
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 * without limitation the rights to use, copy, modify, merge, publish,      *
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 * distribute, distribute with modifications, sublicense, and/or sell       *
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 * copies of the Software, and to permit persons to whom the Software is    *
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 * furnished to do so, subject to the following conditions:                 *
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 *                                                                          *
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 * The above copyright notice and this permission notice shall be included  *
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 * in all copies or substantial portions of the Software.                   *
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 *                                                                          *
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
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 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
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 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
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 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
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 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
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 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
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 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
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 *                                                                          *
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 * Except as contained in this notice, the name(s) of the above copyright   *
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 * holders shall not be used in advertising or otherwise to promote the     *
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 * sale, use or other dealings in this Software without prior written       *
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 * authorization.                                                           *
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 ****************************************************************************/
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/****************************************************************************
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 *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
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 *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
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 *     and: Thomas E. Dickey                        1996 on                 *
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 ****************************************************************************/
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/*
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 *	vidputs(newmode, outc)
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 *
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 *	newmode is taken to be the logical 'or' of the symbols in curses.h
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 *	representing graphic renditions.  The terminal is set to be in all of
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 *	the given modes, if possible.
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 *
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 *	if the new attribute is normal
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 *		if exit-alt-char-set exists
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 *			emit it
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 *		emit exit-attribute-mode
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 *	else if set-attributes exists
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 *		use it to set exactly what you want
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 *	else
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 *		if exit-attribute-mode exists
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 *			turn off everything
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 *		else
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 *			turn off those which can be turned off and aren't in
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 *			newmode.
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 *		turn on each mode which should be on and isn't, one by one
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 *
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 *	NOTE that this algorithm won't achieve the desired mix of attributes
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 *	in some cases, but those are probably just those cases in which it is
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 *	actually impossible, anyway, so...
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 *
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 * 	NOTE that we cannot assume that there's no interaction between color
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 *	and other attribute resets.  So each time we reset color (or other
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 *	attributes) we'll have to be prepared to restore the other.
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 */
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#include <curses.priv.h>
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#include <term.h>
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MODULE_ID("$Id: lib_vidattr.c,v 1.9 2010/01/12 23:22:07 nicm Exp $")
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#define doPut(mode) TPUTS_TRACE(#mode); tputs(mode, 1, outc)
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#define TurnOn(mask,mode) \
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	if ((turn_on & mask) && mode) { doPut(mode); }
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#define TurnOff(mask,mode) \
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	if ((turn_off & mask) && mode) { doPut(mode); turn_off &= ~mask; }
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	/* if there is no current screen, assume we *can* do color */
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#define SetColorsIf(why,old_attr) \
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	if (can_color && (why)) { \
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		int old_pair = PAIR_NUMBER(old_attr); \
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		TR(TRACE_ATTRS, ("old pair = %d -- new pair = %d", old_pair, pair)); \
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		if ((pair != old_pair) \
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		 || (fix_pair0 && (pair == 0)) \
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		 || (reverse ^ ((old_attr & A_REVERSE) != 0))) { \
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			_nc_do_color(old_pair, pair, reverse, outc); \
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		} \
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	}
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#define PreviousAttr _nc_prescreen.previous_attr
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NCURSES_EXPORT(int)
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vidputs(chtype newmode, int (*outc) (int))
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{
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    attr_t turn_on, turn_off;
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    int pair;
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    bool reverse = FALSE;
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    bool can_color = (SP == 0 || SP->_coloron);
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#if NCURSES_EXT_FUNCS
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    bool fix_pair0 = (SP != 0 && SP->_coloron && !SP->_default_color);
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#else
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#define fix_pair0 FALSE
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#endif
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    newmode &= A_ATTRIBUTES;
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    T((T_CALLED("vidputs(%s)"), _traceattr(newmode)));
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    /* this allows us to go on whether or not newterm() has been called */
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    if (SP)
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	PreviousAttr = AttrOf(SCREEN_ATTRS(SP));
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    TR(TRACE_ATTRS, ("previous attribute was %s", _traceattr(PreviousAttr)));
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    if ((SP != 0)
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	&& (magic_cookie_glitch > 0)) {
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#if USE_XMC_SUPPORT
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	static const chtype table[] =
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	{
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	    A_STANDOUT,
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	    A_UNDERLINE,
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	    A_REVERSE,
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	    A_BLINK,
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	    A_DIM,
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	    A_BOLD,
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	    A_INVIS,
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	    A_PROTECT,
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	};
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	unsigned n;
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	int used = 0;
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	int limit = (max_attributes <= 0) ? 1 : max_attributes;
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	chtype retain = 0;
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	/*
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	 * Limit the number of attribute bits set in the newmode according to
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	 * the terminfo max_attributes value.
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	 */
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	for (n = 0; n < SIZEOF(table); ++n) {
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	    if ((table[n] & SP->_ok_attributes) == 0) {
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		newmode &= ~table[n];
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	    } else if ((table[n] & newmode) != 0) {
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		if (used++ >= limit) {
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		    newmode &= ~table[n];
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		    if (newmode == retain)
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			break;
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		} else {
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		    retain = newmode;
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		}
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	    }
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	}
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#else
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	newmode &= ~(SP->_xmc_suppress);
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#endif
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	TR(TRACE_ATTRS, ("suppressed attribute is %s", _traceattr(newmode)));
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    }
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    /*
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     * If we have a terminal that cannot combine color with video
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     * attributes, use the colors in preference.
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     */
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    if (((newmode & A_COLOR) != 0
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	 || fix_pair0)
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	&& (no_color_video > 0)) {
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	/*
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	 * If we had chosen the A_xxx definitions to correspond to the
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	 * no_color_video mask, we could simply shift it up and mask off the
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	 * attributes.  But we did not (actually copied Solaris' definitions).
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	 * However, this is still simpler/faster than a lookup table.
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	 *
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	 * The 63 corresponds to A_STANDOUT, A_UNDERLINE, A_REVERSE, A_BLINK,
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	 * A_DIM, A_BOLD which are 1:1 with no_color_video.  The bits that
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	 * correspond to A_INVIS, A_PROTECT (192) must be shifted up 1 and
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	 * A_ALTCHARSET (256) down 2 to line up.  We use the NCURSES_BITS
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	 * macro so this will work properly for the wide-character layout.
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	 */
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	unsigned value = no_color_video;
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	attr_t mask = NCURSES_BITS((value & 63)
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				   | ((value & 192) << 1)
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				   | ((value & 256) >> 2), 8);
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	if ((mask & A_REVERSE) != 0
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	    && (newmode & A_REVERSE) != 0) {
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	    reverse = TRUE;
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	    mask &= ~A_REVERSE;
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	}
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	newmode &= ~mask;
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    }
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    if (newmode == PreviousAttr)
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	returnCode(OK);
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    pair = PAIR_NUMBER(newmode);
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    if (reverse) {
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	newmode &= ~A_REVERSE;
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    }
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    turn_off = (~newmode & PreviousAttr) & ALL_BUT_COLOR;
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    turn_on = (newmode & ~PreviousAttr) & ALL_BUT_COLOR;
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    SetColorsIf(((pair == 0) && !fix_pair0), PreviousAttr);
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    if (newmode == A_NORMAL) {
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	if ((PreviousAttr & A_ALTCHARSET) && exit_alt_charset_mode) {
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	    doPut(exit_alt_charset_mode);
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	    PreviousAttr &= ~A_ALTCHARSET;
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	}
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	if (PreviousAttr) {
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	    if (exit_attribute_mode) {
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		doPut(exit_attribute_mode);
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	    } else {
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		if (!SP || SP->_use_rmul) {
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		    TurnOff(A_UNDERLINE, exit_underline_mode);
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		}
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		if (!SP || SP->_use_rmso) {
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		    TurnOff(A_STANDOUT, exit_standout_mode);
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		}
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	    }
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	    PreviousAttr &= ALL_BUT_COLOR;
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	}
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	SetColorsIf((pair != 0) || fix_pair0, PreviousAttr);
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    } else if (set_attributes) {
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	if (turn_on || turn_off) {
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	    TPUTS_TRACE("set_attributes");
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	    tputs(tparm(set_attributes,
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			(newmode & A_STANDOUT) != 0,
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			(newmode & A_UNDERLINE) != 0,
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			(newmode & A_REVERSE) != 0,
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			(newmode & A_BLINK) != 0,
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			(newmode & A_DIM) != 0,
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			(newmode & A_BOLD) != 0,
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			(newmode & A_INVIS) != 0,
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			(newmode & A_PROTECT) != 0,
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			(newmode & A_ALTCHARSET) != 0), 1, outc);
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	    PreviousAttr &= ALL_BUT_COLOR;
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	}
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	SetColorsIf((pair != 0) || fix_pair0, PreviousAttr);
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    } else {
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	TR(TRACE_ATTRS, ("turning %s off", _traceattr(turn_off)));
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	TurnOff(A_ALTCHARSET, exit_alt_charset_mode);
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	if (!SP || SP->_use_rmul) {
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	    TurnOff(A_UNDERLINE, exit_underline_mode);
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	}
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	if (!SP || SP->_use_rmso) {
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	    TurnOff(A_STANDOUT, exit_standout_mode);
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	}
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	if (turn_off && exit_attribute_mode) {
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	    doPut(exit_attribute_mode);
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	    turn_on |= (newmode & ALL_BUT_COLOR);
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	    PreviousAttr &= ALL_BUT_COLOR;
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	}
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	SetColorsIf((pair != 0) || fix_pair0, PreviousAttr);
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	TR(TRACE_ATTRS, ("turning %s on", _traceattr(turn_on)));
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	/* *INDENT-OFF* */
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	TurnOn(A_ALTCHARSET,	enter_alt_charset_mode);
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	TurnOn(A_BLINK,		enter_blink_mode);
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	TurnOn(A_BOLD,		enter_bold_mode);
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	TurnOn(A_DIM,		enter_dim_mode);
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	TurnOn(A_REVERSE,	enter_reverse_mode);
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	TurnOn(A_STANDOUT,	enter_standout_mode);
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	TurnOn(A_PROTECT,	enter_protected_mode);
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	TurnOn(A_INVIS,		enter_secure_mode);
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	TurnOn(A_UNDERLINE,	enter_underline_mode);
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#if USE_WIDEC_SUPPORT
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	TurnOn(A_HORIZONTAL,	enter_horizontal_hl_mode);
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	TurnOn(A_LEFT,		enter_left_hl_mode);
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	TurnOn(A_LOW,		enter_low_hl_mode);
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	TurnOn(A_RIGHT,		enter_right_hl_mode);
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	TurnOn(A_TOP,		enter_top_hl_mode);
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	TurnOn(A_VERTICAL,	enter_vertical_hl_mode);
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#endif
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	/* *INDENT-ON* */
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    }
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    if (reverse)
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	newmode |= A_REVERSE;
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    if (SP)
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	SetAttr(SCREEN_ATTRS(SP), newmode);
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    else
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	PreviousAttr = newmode;
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    returnCode(OK);
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}
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NCURSES_EXPORT(int)
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vidattr(chtype newmode)
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{
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    T((T_CALLED("vidattr(%s)"), _traceattr(newmode)));
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    returnCode(vidputs(newmode, _nc_outch));
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}
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NCURSES_EXPORT(chtype)
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termattrs(void)
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{
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    chtype attrs = A_NORMAL;
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    T((T_CALLED("termattrs()")));
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    if (enter_alt_charset_mode)
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	attrs |= A_ALTCHARSET;
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    if (enter_blink_mode)
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	attrs |= A_BLINK;
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    if (enter_bold_mode)
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	attrs |= A_BOLD;
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    if (enter_dim_mode)
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	attrs |= A_DIM;
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    if (enter_reverse_mode)
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	attrs |= A_REVERSE;
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    if (enter_standout_mode)
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	attrs |= A_STANDOUT;
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    if (enter_protected_mode)
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	attrs |= A_PROTECT;
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    if (enter_secure_mode)
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	attrs |= A_INVIS;
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    if (enter_underline_mode)
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	attrs |= A_UNDERLINE;
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    if (SP->_coloron)
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	attrs |= A_COLOR;
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    returnChar(attrs);
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}