ncurses/ncurses/base/lib_dft_fgbg.c

/****************************************************************************
 * Copyright (c) 1998-2011,2014 Free Software Foundation, Inc.              *
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 * 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:                 *
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 * 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               *
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 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
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/****************************************************************************
 *  Author: Thomas E. Dickey          1998-on                               *
 *          Juergen Pfeifer           2009                                  *
 ****************************************************************************/

#include <curses.priv.h>

#ifndef CUR
#define CUR SP_TERMTYPE
#endif

MODULE_ID("$Id: lib_dft_fgbg.c,v 1.27 2014/03/08 20:32:59 tom Exp $")

/*
 * Modify the behavior of color-pair 0 so that the library doesn't assume that
 * it is white on black.  This is an extension to XSI curses.
 */
NCURSES_EXPORT(int)
NCURSES_SP_NAME(use_default_colors) (NCURSES_SP_DCL0)
{
    T((T_CALLED("use_default_colors(%p)"), (void *) SP_PARM));
    returnCode(NCURSES_SP_NAME(assume_default_colors) (NCURSES_SP_ARGx -1, -1));
}

#if NCURSES_SP_FUNCS
NCURSES_EXPORT(int)
use_default_colors(void)
{
    return NCURSES_SP_NAME(use_default_colors) (CURRENT_SCREEN);
}
#endif

/*
 * Modify the behavior of color-pair 0 so that the library assumes that it
 * is something specific, possibly not white on black.
 */
NCURSES_EXPORT(int)
NCURSES_SP_NAME(assume_default_colors) (NCURSES_SP_DCLx int fg, int bg)
{
    int code = ERR;

    T((T_CALLED("assume_default_colors(%p,%d,%d)"), (void *) SP_PARM, fg, bg));
#ifdef USE_TERM_DRIVER
    if (sp != 0)
	code = CallDriver_2(sp, td_defaultcolors, fg, bg);
#else
    if ((orig_pair || orig_colors) && !initialize_pair) {

	SP_PARM->_default_color = isDefaultColor(fg) || isDefaultColor(bg);
	SP_PARM->_has_sgr_39_49 = (tigetflag("AX") == TRUE);
	SP_PARM->_default_fg = isDefaultColor(fg) ? COLOR_DEFAULT : (fg & C_MASK);
	SP_PARM->_default_bg = isDefaultColor(bg) ? COLOR_DEFAULT : (bg & C_MASK);
	if (SP_PARM->_color_pairs != 0) {
	    bool save = SP_PARM->_default_color;
	    SP_PARM->_assumed_color = TRUE;
	    SP_PARM->_default_color = TRUE;
	    init_pair(0, (short) fg, (short) bg);
	    SP_PARM->_default_color = save;
	}
	code = OK;
    }
#endif
    returnCode(code);
}

#if NCURSES_SP_FUNCS
NCURSES_EXPORT(int)
assume_default_colors(int fg, int bg)
{
    return NCURSES_SP_NAME(assume_default_colors) (CURRENT_SCREEN, fg, bg);
}
#endif