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tetex-bin  3.0
lib_dft_fgbg.c
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00001 /****************************************************************************
00002  * Copyright (c) 1998,1999,2000 Free Software Foundation, Inc.              *
00003  *                                                                          *
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00011  *                                                                          *
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00014  *                                                                          *
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00028 
00029 /****************************************************************************
00030  *  Author: Thomas E. Dickey <dickey@clark.net> 1997,1999                   *
00031  ****************************************************************************/
00032 
00033 #include <curses.priv.h>
00034 #include <term.h>
00035 
00036 MODULE_ID("$Id: lib_dft_fgbg.c,v 1.15 2000/12/10 02:43:27 tom Exp $")
00037 
00038 /*
00039  * Modify the behavior of color-pair 0 so that the library doesn't assume that
00040  * it is white on black.  This is an extension to XSI curses.
00041  */
00042 NCURSES_EXPORT(int)
00043 use_default_colors(void)
00044 {
00045     T((T_CALLED("use_default_colors()")));
00046     returnCode(assume_default_colors(C_MASK, C_MASK));
00047 }
00048 
00049 /*
00050  * Modify the behavior of color-pair 0 so that the library assumes that it
00051  * is something specific, possibly not white on black.
00052  */
00053 NCURSES_EXPORT(int)
00054 assume_default_colors(int fg, int bg)
00055 {
00056     T((T_CALLED("assume_default_colors(%d,%d)"), fg, bg));
00057 
00058     if (!orig_pair && !orig_colors)
00059        returnCode(ERR);
00060 
00061     if (initialize_pair)    /* don't know how to handle this */
00062        returnCode(ERR);
00063 
00064     SP->_default_color = (fg < 0 || fg == C_MASK) || (bg < 0 || bg == C_MASK);
00065     SP->_has_sgr_39_49 = (tigetflag("AX") == TRUE);
00066     SP->_default_fg = (fg >= 0) ? (fg & C_MASK) : C_MASK;
00067     SP->_default_bg = (bg >= 0) ? (bg & C_MASK) : C_MASK;
00068     if (SP->_color_pairs != 0)
00069        init_pair(0, fg, bg);
00070     returnCode(OK);
00071 }