1 /****************************************************************************
2 * Copyright 2018-2021,2022 Thomas E. Dickey *
3 * Copyright 2003-2014,2017 Free Software Foundation, Inc. *
4 * *
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: *
12 * *
13 * The above copyright notice and this permission notice shall be included *
14 * in all copies or substantial portions of the Software. *
15 * *
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. *
23 * *
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 *
27 * authorization. *
28 ****************************************************************************/
29 /*
30 * $Id: background.c,v 1.24 2022/12/10 22:28:50 tom Exp $
31 */
32
33 #define NEED_COLOR_CODE 1
34 #define NEED_COLOR_NAME 1
35 #include <color_name.h>
36 #include <dump_window.h>
37
38 static int default_bg = COLOR_BLACK;
39 static int default_fg = COLOR_WHITE;
40
41 static void
test_background(void)42 test_background(void)
43 {
44 NCURSES_COLOR_T f, b;
45 int row;
46 int chr;
47
48 if (pair_content(0, &f, &b) == ERR) {
49 printw("pair 0 contains no data\n");
50 } else {
51 printw("pair 0 contains (%d,%d)\n", (int) f, (int) b);
52 }
53 dump_window(stdscr);
54
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");
59 dump_window(stdscr);
60
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));
65 dump_window(stdscr);
66
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));
71 /*
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.
75 *
76 * Characters not in the line-drawing range are usually sent as-is.
77 *
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.
81 */
82 row = 7;
83 mvprintw(row++, 10, "l");
84 for (chr = 0; chr < 32; ++chr)
85 AddCh(' ');
86 printw("x\n");
87 chr = 32;
88 while (chr < 128) {
89 if ((chr % 32) == 0)
90 mvprintw(row++, 10, "x");
91 AddCh((chr == 127) ? ' ' : chr);
92 if ((++chr % 32) == 0)
93 printw("x\n");
94 }
95 mvprintw(row++, 10, "m");
96 for (chr = 0; chr < 32; ++chr)
97 AddCh(' ');
98 printw("j\n");
99 dump_window(stdscr);
100
101 bkgdset((chtype) (' ' | COLOR_PAIR(0)));
102 printw("Default Colors\n");
103 dump_window(stdscr);
104
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));
108 dump_window(stdscr);
109
110 printw("Setting screen to pair 0\n");
111 bkgd((chtype) (' ' | COLOR_PAIR(0)));
112 dump_window(stdscr);
113
114 printw("Setting screen to pair 1\n");
115 bkgd((chtype) (' ' | COLOR_PAIR(1)));
116 dump_window(stdscr);
117
118 printw("Setting screen to pair 2\n");
119 bkgd((chtype) (' ' | COLOR_PAIR(2)));
120 dump_window(stdscr);
121
122 printw("Setting screen to pair 3\n");
123 bkgd((chtype) (' ' | COLOR_PAIR(3)));
124 dump_window(stdscr);
125
126 printw("Setting screen to pair 0\n");
127 bkgd((chtype) (' ' | COLOR_PAIR(0)));
128 dump_window(stdscr);
129 }
130
131 static void
usage(int ok)132 usage(int ok)
133 {
134 static const char *msg[] =
135 {
136 "Usage: background [options]"
137 ,""
138 ,USAGE_COMMON
139 ,"Options:"
140 #if HAVE_ASSUME_DEFAULT_COLORS
141 ," -a invoke assume_default_colors, repeat to use in init_pair"
142 #endif
143 ," -b XXX specify background color"
144 #if HAVE_USE_DEFAULT_COLORS
145 ," -d invoke use_default_colors, repeat to use in init_pair"
146 #endif
147 ," -f XXX specify foreground color"
148 ," -l FILE log window-dumps to this file"
149 };
150 size_t n;
151
152 for (n = 0; n < SIZEOF(msg); n++)
153 fprintf(stderr, "%s\n", msg[n]);
154
155 ExitProgram(ok ? EXIT_SUCCESS : EXIT_FAILURE);
156 }
157 /* *INDENT-OFF* */
VERSION_COMMON()158 VERSION_COMMON()
159 /* *INDENT-ON* */
160
161 int
162 main(int argc, char *argv[])
163 {
164 #if HAVE_ASSUME_DEFAULT_COLORS
165 int a_option = 0;
166 #endif
167 #if HAVE_USE_DEFAULT_COLORS
168 int d_option = 0;
169 #endif
170 int ch;
171
172 setlocale(LC_ALL, "");
173
174 while ((ch = getopt(argc, argv, OPTS_COMMON "ab:df:l:")) != -1) {
175 switch (ch) {
176 #if HAVE_ASSUME_DEFAULT_COLORS
177 case 'a':
178 ++a_option;
179 break;
180 #endif
181 case 'b':
182 default_bg = color_code(optarg);
183 break;
184 #if HAVE_USE_DEFAULT_COLORS
185 case 'd':
186 ++d_option;
187 break;
188 #endif
189 case 'f':
190 default_fg = color_code(optarg);
191 break;
192 case 'l':
193 if (!open_dump(optarg))
194 usage(FALSE);
195 break;
196 case OPTS_VERSION:
197 show_version(argv);
198 ExitProgram(EXIT_SUCCESS);
199 default:
200 usage(ch == OPTS_USAGE);
201 /* NOTREACHED */
202 }
203 }
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);
208 }
209 #endif
210
211 initscr();
212 cbreak();
213 noecho();
214
215 if (has_colors()) {
216 start_color();
217
218 #if HAVE_USE_DEFAULT_COLORS
219 if (d_option) {
220 printw("Using default colors...\n");
221 use_default_colors();
222 if (d_option > 1) {
223 default_fg = -1;
224 default_bg = -1;
225 }
226 }
227 #endif
228 #if HAVE_ASSUME_DEFAULT_COLORS
229 if (a_option) {
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);
234 if (a_option > 1) {
235 default_fg = -1;
236 default_bg = -1;
237 }
238 }
239 #endif
240
241 test_background();
242
243 } else {
244 printw("This demo requires a color terminal");
245 getch();
246 }
247 endwin();
248 close_dump();
249 ExitProgram(EXIT_SUCCESS);
250 }
251