xref: /openbsd-src/lib/libcurses/base/lib_dft_fgbg.c (revision c7ef0cfc17afcba97172c25e1e3a943e893bc632)
1 /* $OpenBSD: lib_dft_fgbg.c,v 1.9 2023/10/17 09:52:08 nicm Exp $ */
2 
3 /****************************************************************************
4  * Copyright 2020,2021 Thomas E. Dickey                                     *
5  * Copyright 1998-2014,2017 Free Software Foundation, Inc.                  *
6  *                                                                          *
7  * Permission is hereby granted, free of charge, to any person obtaining a  *
8  * copy of this software and associated documentation files (the            *
9  * "Software"), to deal in the Software without restriction, including      *
10  * without limitation the rights to use, copy, modify, merge, publish,      *
11  * distribute, distribute with modifications, sublicense, and/or sell       *
12  * copies of the Software, and to permit persons to whom the Software is    *
13  * furnished to do so, subject to the following conditions:                 *
14  *                                                                          *
15  * The above copyright notice and this permission notice shall be included  *
16  * in all copies or substantial portions of the Software.                   *
17  *                                                                          *
18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
21  * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
22  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
23  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
24  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
25  *                                                                          *
26  * Except as contained in this notice, the name(s) of the above copyright   *
27  * holders shall not be used in advertising or otherwise to promote the     *
28  * sale, use or other dealings in this Software without prior written       *
29  * authorization.                                                           *
30  ****************************************************************************/
31 
32 /****************************************************************************
33  *  Author: Thomas E. Dickey          1998-on                               *
34  *          Juergen Pfeifer           2009                                  *
35  ****************************************************************************/
36 
37 #include <curses.priv.h>
38 
39 #ifndef CUR
40 #define CUR SP_TERMTYPE
41 #endif
42 
43 MODULE_ID("$Id: lib_dft_fgbg.c,v 1.9 2023/10/17 09:52:08 nicm Exp $")
44 
45 /*
46  * Modify the behavior of color-pair 0 so that the library doesn't assume that
47  * it is white on black.  This is an extension to XSI curses.
48  */
NCURSES_EXPORT(int)49 NCURSES_EXPORT(int)
50 NCURSES_SP_NAME(use_default_colors) (NCURSES_SP_DCL0)
51 {
52     T((T_CALLED("use_default_colors(%p)"), (void *) SP_PARM));
53     returnCode(NCURSES_SP_NAME(assume_default_colors) (NCURSES_SP_ARGx -1, -1));
54 }
55 
56 #if NCURSES_SP_FUNCS
57 NCURSES_EXPORT(int)
use_default_colors(void)58 use_default_colors(void)
59 {
60     return NCURSES_SP_NAME(use_default_colors) (CURRENT_SCREEN);
61 }
62 #endif
63 
64 /*
65  * Modify the behavior of color-pair 0 so that the library assumes that it
66  * is something specific, possibly not white on black.
67  */
68 NCURSES_EXPORT(int)
NCURSES_SP_NAME(assume_default_colors)69 NCURSES_SP_NAME(assume_default_colors) (NCURSES_SP_DCLx int fg, int bg)
70 {
71     int code = ERR;
72 
73     T((T_CALLED("assume_default_colors(%p,%d,%d)"), (void *) SP_PARM, fg, bg));
74     if (SP_PARM != 0) {
75 #ifdef USE_TERM_DRIVER
76 	code = CallDriver_2(SP_PARM, td_defaultcolors, fg, bg);
77 #else
78 	if ((orig_pair || orig_colors) && !initialize_pair) {
79 
80 	    SP_PARM->_default_color = isDefaultColor(fg) || isDefaultColor(bg);
81 	    SP_PARM->_has_sgr_39_49 = (tigetflag("AX") == TRUE);
82 	    SP_PARM->_default_fg = isDefaultColor(fg) ? COLOR_DEFAULT : fg;
83 	    SP_PARM->_default_bg = isDefaultColor(bg) ? COLOR_DEFAULT : bg;
84 	    if (SP_PARM->_color_pairs != 0) {
85 		bool save = SP_PARM->_default_color;
86 		SP_PARM->_assumed_color = TRUE;
87 		SP_PARM->_default_color = TRUE;
88 		NCURSES_SP_NAME(init_pair) (NCURSES_SP_ARGx 0,
89 					    (short)fg,
90 					    (short)bg);
91 		SP_PARM->_default_color = save;
92 	    }
93 	    code = OK;
94 	}
95 #endif
96     }
97     returnCode(code);
98 }
99 
100 #if NCURSES_SP_FUNCS
101 NCURSES_EXPORT(int)
assume_default_colors(int fg,int bg)102 assume_default_colors(int fg, int bg)
103 {
104     return NCURSES_SP_NAME(assume_default_colors) (CURRENT_SCREEN, fg, bg);
105 }
106 #endif
107