lib_dft_fgbg.c

ncurses-5.4

/****************************************************************************
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/****************************************************************************
 *  Author: Thomas E. Dickey <[e-mail]> 1997,1999                   *
 ****************************************************************************/

#include <curses.priv.h>
#include <term.h>

MODULE_ID("$Id: lib_dft_fgbg.c,v 1.15 2000/12/10 02:43:27 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)
use_default_colors(void)
{
    T((T_CALLED("use_default_colors()")));
    returnCode(assume_default_colors(C_MASK, C_MASK));
}

/*
 * 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)
assume_default_colors(int fg, int bg)
{
    T((T_CALLED("assume_default_colors(%d,%d)"), fg, bg));

    if (!orig_pair && !orig_colors)
	returnCode(ERR);

    if (initialize_pair)	/* don't know how to handle this */
	returnCode(ERR);

    SP->_default_color = (fg < 0 || fg == C_MASK) || (bg < 0 || bg == C_MASK);
    SP->_has_sgr_39_49 = (tigetflag("AX") == TRUE);
    SP->_default_fg = (fg >= 0) ? (fg & C_MASK) : C_MASK;
    SP->_default_bg = (bg >= 0) ? (bg & C_MASK) : C_MASK;
    if (SP->_color_pairs != 0)
	init_pair(0, fg, bg);
    returnCode(OK);
}