lib_dft_fgbg.c revision 76726 
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28
29/****************************************************************************
30 *  Author: Thomas E. Dickey <dickey@clark.net> 1997,1999                   *
31 ****************************************************************************/
32
33#include <curses.priv.h>
34#include <term.h>
35
36MODULE_ID("$Id: lib_dft_fgbg.c,v 1.15 2000/12/10 02:43:27 tom Exp $")
37
38/*
39 * Modify the behavior of color-pair 0 so that the library doesn't assume that
40 * it is white on black.  This is an extension to XSI curses.
41 */
42NCURSES_EXPORT(int)
43use_default_colors(void)
44{
45    T((T_CALLED("use_default_colors()")));
46    returnCode(assume_default_colors(C_MASK, C_MASK));
47}
48
49/*
50 * Modify the behavior of color-pair 0 so that the library assumes that it
51 * is something specific, possibly not white on black.
52 */
53NCURSES_EXPORT(int)
54assume_default_colors(int fg, int bg)
55{
56    T((T_CALLED("assume_default_colors(%d,%d)"), fg, bg));
57
58    if (!orig_pair && !orig_colors)
59	returnCode(ERR);
60
61    if (initialize_pair)	/* don't know how to handle this */
62	returnCode(ERR);
63
64    SP->_default_color = (fg < 0 || fg == C_MASK) || (bg < 0 || bg == C_MASK);
65    SP->_has_sgr_39_49 = (tigetflag("AX") == TRUE);
66    SP->_default_fg = (fg >= 0) ? (fg & C_MASK) : C_MASK;
67    SP->_default_bg = (bg >= 0) ? (bg & C_MASK) : C_MASK;
68    if (SP->_color_pairs != 0)
69	init_pair(0, fg, bg);
70    returnCode(OK);
71}
72