1 /****************************************************************************
2 * Copyright 2018-2021,2022 Thomas E. Dickey *
3 * Copyright 2003-2014,2017 Free Software Foundation, Inc. *
5 * Permission is hereby granted, free of charge, to any person obtaining a *
6 * copy of this software and associated documentation files (the *
7 * "Software"), to deal in the Software without restriction, including *
8 * without limitation the rights to use, copy, modify, merge, publish, *
9 * distribute, distribute with modifications, sublicense, and/or sell *
10 * copies of the Software, and to permit persons to whom the Software is *
11 * furnished to do so, subject to the following conditions: *
13 * The above copyright notice and this permission notice shall be included *
14 * in all copies or substantial portions of the Software. *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
19 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
22 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
24 * Except as contained in this notice, the name(s) of the above copyright *
25 * holders shall not be used in advertising or otherwise to promote the *
26 * sale, use or other dealings in this Software without prior written *
28 ****************************************************************************/
30 * $Id: background.c,v 1.24 2022/12/10 22:28:50 tom Exp $
33 #define NEED_COLOR_CODE 1
34 #define NEED_COLOR_NAME 1
35 #include <color_name.h>
36 #include <dump_window.h>
38 static int default_bg = COLOR_BLACK;
39 static int default_fg = COLOR_WHITE;
48 if (pair_content(0, &f, &b) == ERR) {
49 printw("pair 0 contains no data\n");
51 printw("pair 0 contains (%d,%d)\n", (int) f, (int) b);
55 printw("Initializing pair 1 to red/%s\n", color_name(default_bg));
56 init_pair(1, COLOR_RED, (NCURSES_COLOR_T) default_bg);
57 bkgdset((chtype) (' ' | COLOR_PAIR(1)));
58 printw("RED/BLACK\n");
61 printw("Initializing pair 2 to %s/blue\n", color_name(default_fg));
62 init_pair(2, (NCURSES_COLOR_T) default_fg, COLOR_BLUE);
63 bkgdset((chtype) (' ' | COLOR_PAIR(2)));
64 printw("This line should be %s/blue\n", color_name(default_fg));
67 printw("Initializing pair 3 to %s/cyan (ACS_HLINE)\n", color_name(default_fg));
68 init_pair(3, (NCURSES_COLOR_T) default_fg, COLOR_CYAN);
69 printw("...and drawing a box which should be followed by lines\n");
70 bkgdset(ACS_HLINE | (chtype) COLOR_PAIR(3));
72 * Characters from vt100 line-drawing should be mapped to line-drawing,
73 * since A_ALTCHARSET is set in the background, and the character part
74 * of the background is replaced by the nonblank characters written.
76 * Characters not in the line-drawing range are usually sent as-is.
78 * With SVr4 curses it is possible to rely on this to mix uppercase text
79 * with the (lowercase) line-drawing characters. ncurses uses some of
80 * the uppercase characters for encoding thick- and double-lines.
83 mvprintw(row++, 10, "l");
84 for (chr = 0; chr < 32; ++chr)
90 mvprintw(row++, 10, "x");
91 AddCh((chr == 127) ? ' ' : chr);
92 if ((++chr % 32) == 0)
95 mvprintw(row++, 10, "m");
96 for (chr = 0; chr < 32; ++chr)
101 bkgdset((chtype) (' ' | COLOR_PAIR(0)));
102 printw("Default Colors\n");
105 printw("Resetting colors to pair 1\n");
106 bkgdset((chtype) (' ' | COLOR_PAIR(1)));
107 printw("This line should be red/%s\n", color_name(default_bg));
110 printw("Setting screen to pair 0\n");
111 bkgd((chtype) (' ' | COLOR_PAIR(0)));
114 printw("Setting screen to pair 1\n");
115 bkgd((chtype) (' ' | COLOR_PAIR(1)));
118 printw("Setting screen to pair 2\n");
119 bkgd((chtype) (' ' | COLOR_PAIR(2)));
122 printw("Setting screen to pair 3\n");
123 bkgd((chtype) (' ' | COLOR_PAIR(3)));
126 printw("Setting screen to pair 0\n");
127 bkgd((chtype) (' ' | COLOR_PAIR(0)));
134 static const char *msg[] =
136 "Usage: background [options]"
140 #if HAVE_ASSUME_DEFAULT_COLORS
141 ," -a invoke assume_default_colors, repeat to use in init_pair"
143 ," -b XXX specify background color"
144 #if HAVE_USE_DEFAULT_COLORS
145 ," -d invoke use_default_colors, repeat to use in init_pair"
147 ," -f XXX specify foreground color"
148 ," -l FILE log window-dumps to this file"
152 for (n = 0; n < SIZEOF(msg); n++)
153 fprintf(stderr, "%s\n", msg[n]);
155 ExitProgram(ok ? EXIT_SUCCESS : EXIT_FAILURE);
162 main(int argc, char *argv[])
164 #if HAVE_ASSUME_DEFAULT_COLORS
167 #if HAVE_USE_DEFAULT_COLORS
172 setlocale(LC_ALL, "");
174 while ((ch = getopt(argc, argv, OPTS_COMMON "ab:df:l:")) != -1) {
176 #if HAVE_ASSUME_DEFAULT_COLORS
182 default_bg = color_code(optarg);
184 #if HAVE_USE_DEFAULT_COLORS
190 default_fg = color_code(optarg);
193 if (!open_dump(optarg))
198 ExitProgram(EXIT_SUCCESS);
200 usage(ch == OPTS_USAGE);
204 #if HAVE_USE_DEFAULT_COLORS && HAVE_ASSUME_DEFAULT_COLORS
205 if (a_option && d_option) {
206 fprintf(stderr, "Use either -a or -d option, but not both\n");
207 ExitProgram(EXIT_FAILURE);
218 #if HAVE_USE_DEFAULT_COLORS
220 printw("Using default colors...\n");
221 use_default_colors();
228 #if HAVE_ASSUME_DEFAULT_COLORS
230 printw("Using assumed colors %s/%s...\n",
231 color_name(default_fg),
232 color_name(default_bg));
233 assume_default_colors(default_fg, default_bg);
244 printw("This demo requires a color terminal");
249 ExitProgram(EXIT_SUCCESS);