242 lines
7.2 KiB
C
242 lines
7.2 KiB
C
/****************************************************************************
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* Copyright 2018,2020 Thomas E. Dickey *
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* Copyright 2003-2014,2017 Free Software Foundation, Inc. *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a *
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* copy of this software and associated documentation files (the *
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* "Software"), to deal in the Software without restriction, including *
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* without limitation the rights to use, copy, modify, merge, publish, *
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* distribute, distribute with modifications, sublicense, and/or sell *
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* copies of the Software, and to permit persons to whom the Software is *
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* furnished to do so, subject to the following conditions: *
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* *
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* The above copyright notice and this permission notice shall be included *
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* in all copies or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
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* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
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* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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* *
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* Except as contained in this notice, the name(s) of the above copyright *
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* holders shall not be used in advertising or otherwise to promote the *
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* sale, use or other dealings in this Software without prior written *
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* authorization. *
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****************************************************************************/
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/*
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* $Id: background.c,v 1.19 2020/02/02 23:34:34 tom Exp $
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*/
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#define NEED_COLOR_CODE 1
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#define NEED_COLOR_NAME 1
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#include <color_name.h>
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#include <dump_window.h>
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static int default_bg = COLOR_BLACK;
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static int default_fg = COLOR_WHITE;
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static void
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test_background(void)
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{
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NCURSES_COLOR_T f, b;
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int row;
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int chr;
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if (pair_content(0, &f, &b) == ERR) {
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printw("pair 0 contains no data\n");
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} else {
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printw("pair 0 contains (%d,%d)\n", (int) f, (int) b);
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}
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dump_window(stdscr);
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printw("Initializing pair 1 to red/%s\n", color_name(default_bg));
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init_pair(1, COLOR_RED, (NCURSES_COLOR_T) default_bg);
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bkgdset((chtype) (' ' | COLOR_PAIR(1)));
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printw("RED/BLACK\n");
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dump_window(stdscr);
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printw("Initializing pair 2 to %s/blue\n", color_name(default_fg));
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init_pair(2, (NCURSES_COLOR_T) default_fg, COLOR_BLUE);
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bkgdset((chtype) (' ' | COLOR_PAIR(2)));
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printw("This line should be %s/blue\n", color_name(default_fg));
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dump_window(stdscr);
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printw("Initializing pair 3 to %s/cyan (ACS_HLINE)\n", color_name(default_fg));
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init_pair(3, (NCURSES_COLOR_T) default_fg, COLOR_CYAN);
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printw("...and drawing a box which should be followed by lines\n");
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bkgdset(ACS_HLINE | (chtype) COLOR_PAIR(3));
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/*
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* Characters from vt100 line-drawing should be mapped to line-drawing,
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* since A_ALTCHARSET is set in the background, and the character part
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* of the background is replaced by the nonblank characters written.
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*
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* Characters not in the line-drawing range are usually sent as-is.
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*
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* With SVr4 curses it is possible to rely on this to mix uppercase text
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* with the (lowercase) line-drawing characters. ncurses uses some of
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* the uppercase characters for encoding thick- and double-lines.
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*/
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row = 7;
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mvprintw(row++, 10, "l");
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for (chr = 0; chr < 32; ++chr)
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AddCh(' ');
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printw("x\n");
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chr = 32;
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while (chr < 128) {
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if ((chr % 32) == 0)
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mvprintw(row++, 10, "x");
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AddCh((chr == 127) ? ' ' : chr);
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if ((++chr % 32) == 0)
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printw("x\n");
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}
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mvprintw(row++, 10, "m");
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for (chr = 0; chr < 32; ++chr)
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AddCh(' ');
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printw("j\n");
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dump_window(stdscr);
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bkgdset((chtype) (' ' | COLOR_PAIR(0)));
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printw("Default Colors\n");
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dump_window(stdscr);
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printw("Resetting colors to pair 1\n");
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bkgdset((chtype) (' ' | COLOR_PAIR(1)));
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printw("This line should be red/%s\n", color_name(default_bg));
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dump_window(stdscr);
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printw("Setting screen to pair 0\n");
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bkgd((chtype) (' ' | COLOR_PAIR(0)));
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dump_window(stdscr);
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printw("Setting screen to pair 1\n");
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bkgd((chtype) (' ' | COLOR_PAIR(1)));
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dump_window(stdscr);
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printw("Setting screen to pair 2\n");
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bkgd((chtype) (' ' | COLOR_PAIR(2)));
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dump_window(stdscr);
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printw("Setting screen to pair 3\n");
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bkgd((chtype) (' ' | COLOR_PAIR(3)));
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dump_window(stdscr);
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printw("Setting screen to pair 0\n");
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bkgd((chtype) (' ' | COLOR_PAIR(0)));
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dump_window(stdscr);
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}
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static void
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usage(void)
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{
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static const char *msg[] =
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{
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"Usage: background [options]"
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,""
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,"Options:"
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#if HAVE_ASSUME_DEFAULT_COLORS
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," -a invoke assume_default_colors, repeat to use in init_pair"
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#endif
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," -b XXX specify background color"
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#if HAVE_USE_DEFAULT_COLORS
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," -d invoke use_default_colors, repeat to use in init_pair"
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#endif
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," -f XXX specify foreground color"
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};
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size_t n;
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for (n = 0; n < SIZEOF(msg); n++)
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fprintf(stderr, "%s\n", msg[n]);
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ExitProgram(EXIT_FAILURE);
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}
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int
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main(int argc GCC_UNUSED, char *argv[]GCC_UNUSED)
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{
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#if HAVE_ASSUME_DEFAULT_COLORS
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int a_option = 0;
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#endif
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#if HAVE_USE_DEFAULT_COLORS
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int d_option = 0;
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#endif
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int n;
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setlocale(LC_ALL, "");
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while ((n = getopt(argc, argv, "ab:df:l:")) != -1) {
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switch (n) {
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#if HAVE_ASSUME_DEFAULT_COLORS
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case 'a':
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++a_option;
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break;
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#endif
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case 'b':
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default_bg = color_code(optarg);
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break;
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#if HAVE_USE_DEFAULT_COLORS
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case 'd':
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++d_option;
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break;
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#endif
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case 'f':
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default_fg = color_code(optarg);
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break;
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case 'l':
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if (!open_dump(optarg))
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usage();
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break;
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default:
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usage();
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}
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}
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#if HAVE_USE_DEFAULT_COLORS && HAVE_ASSUME_DEFAULT_COLORS
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if (a_option && d_option) {
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fprintf(stderr, "Use either -a or -d option, but not both\n");
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ExitProgram(EXIT_FAILURE);
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}
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#endif
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initscr();
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cbreak();
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noecho();
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if (has_colors()) {
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start_color();
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#if HAVE_USE_DEFAULT_COLORS
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if (d_option) {
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printw("Using default colors...\n");
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use_default_colors();
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if (d_option > 1) {
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default_fg = -1;
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default_bg = -1;
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}
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}
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#endif
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#if HAVE_ASSUME_DEFAULT_COLORS
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if (a_option) {
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printw("Using assumed colors %s/%s...\n",
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color_name(default_fg),
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color_name(default_bg));
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assume_default_colors(default_fg, default_bg);
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if (a_option > 1) {
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default_fg = -1;
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default_bg = -1;
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}
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}
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#endif
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test_background();
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} else {
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printw("This demo requires a color terminal");
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getch();
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}
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endwin();
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close_dump();
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ExitProgram(EXIT_SUCCESS);
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}
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