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/****************************************************************************
* Copyright (c) 2003-2012,2014 Free Software Foundation, Inc. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the *
* "Software"), to deal in the Software without restriction, including *
* without limitation the rights to use, copy, modify, merge, publish, *
* distribute, distribute with modifications, sublicense, and/or sell *
* copies of the Software, and to permit persons to whom the Software is *
* furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included *
* in all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
* *
* Except as contained in this notice, the name(s) of the above copyright *
* holders shall not be used in advertising or otherwise to promote the *
* sale, use or other dealings in this Software without prior written *
* authorization. *
****************************************************************************/
/*
* $Id: background.c,v 1.15 2014/08/09 22:31:23 tom Exp $
*/
#define NEED_COLOR_CODE 1
#define NEED_COLOR_NAME 1
#include <color_name.h>
static int default_bg = COLOR_BLACK;
static int default_fg = COLOR_WHITE;
static void
test_background(void)
{
NCURSES_COLOR_T f, b;
int row;
int chr;
if (pair_content(0, &f, &b) == ERR) {
printw("pair 0 contains no data\n");
} else {
printw("pair 0 contains (%d,%d)\n", (int) f, (int) b);
}
getch();
printw("Initializing pair 1 to red/%s\n", color_name(default_bg));
init_pair(1, COLOR_RED, (NCURSES_COLOR_T) default_bg);
bkgdset((chtype) (' ' | COLOR_PAIR(1)));
printw("RED/BLACK\n");
getch();
printw("Initializing pair 2 to %s/blue\n", color_name(default_fg));
init_pair(2, (NCURSES_COLOR_T) default_fg, COLOR_BLUE);
bkgdset((chtype) (' ' | COLOR_PAIR(2)));
printw("This line should be %s/blue\n", color_name(default_fg));
getch();
printw("Initializing pair 3 to %s/cyan (ACS_HLINE)\n", color_name(default_fg));
init_pair(3, (NCURSES_COLOR_T) default_fg, COLOR_CYAN);
printw("...and drawing a box which should be followed by lines\n");
bkgdset(ACS_HLINE | (attr_t) COLOR_PAIR(3));
/*
* Characters from vt100 line-drawing should be mapped to line-drawing,
* since A_ALTCHARSET is set in the background, and the character part
* of the background is replaced by the nonblank characters written.
*
* Characters not in the line-drawing range are usually sent as-is.
*
* With SVr4 curses it is possible to rely on this to mix uppercase text
* with the (lowercase) line-drawing characters. ncurses uses some of
* the uppercase characters for encoding thick- and double-lines.
*/
row = 7;
mvprintw(row++, 10, "l");
for (chr = 0; chr < 32; ++chr)
addch(' ');
printw("x\n");
chr = 32;
while (chr < 128) {
if ((chr % 32) == 0)
mvprintw(row++, 10, "x");
addch((chtype) ((chr == 127) ? ' ' : chr));
if ((++chr % 32) == 0)
printw("x\n");
}
mvprintw(row++, 10, "m");
for (chr = 0; chr < 32; ++chr)
addch(' ');
printw("j\n");
getch();
bkgdset((chtype) (' ' | COLOR_PAIR(0)));
printw("Default Colors\n");
getch();
printw("Resetting colors to pair 1\n");
bkgdset((chtype) (' ' | COLOR_PAIR(1)));
printw("This line should be red/%s\n", color_name(default_bg));
getch();
printw("Setting screen to pair 0\n");
bkgd((chtype) (' ' | COLOR_PAIR(0)));
getch();
printw("Setting screen to pair 1\n");
bkgd((chtype) (' ' | COLOR_PAIR(1)));
getch();
printw("Setting screen to pair 2\n");
bkgd((chtype) (' ' | COLOR_PAIR(2)));
getch();
printw("Setting screen to pair 3\n");
bkgd((chtype) (' ' | COLOR_PAIR(3)));
getch();
printw("Setting screen to pair 0\n");
bkgd((chtype) (' ' | COLOR_PAIR(0)));
getch();
}
static void
usage(void)
{
static const char *msg[] =
{
"Usage: background [options]"
,""
,"Options:"
#if HAVE_ASSUME_DEFAULT_COLORS
," -a invoke assume_default_colors, repeat to use in init_pair"
#endif
," -b XXX specify background color"
#if HAVE_USE_DEFAULT_COLORS
," -d invoke use_default_colors, repeat to use in init_pair"
#endif
," -f XXX specify foreground color"
};
size_t n;
for (n = 0; n < SIZEOF(msg); n++)
fprintf(stderr, "%s\n", msg[n]);
ExitProgram(EXIT_FAILURE);
}
int
main(int argc GCC_UNUSED, char *argv[]GCC_UNUSED)
{
#if HAVE_ASSUME_DEFAULT_COLORS
int a_option = 0;
#endif
#if HAVE_USE_DEFAULT_COLORS
int d_option = 0;
#endif
int n;
setlocale(LC_ALL, "");
while ((n = getopt(argc, argv, "ab:df:")) != -1) {
switch (n) {
#if HAVE_ASSUME_DEFAULT_COLORS
case 'a':
++a_option;
break;
#endif
case 'b':
default_bg = color_code(optarg);
break;
#if HAVE_USE_DEFAULT_COLORS
case 'd':
++d_option;
break;
#endif
case 'f':
default_fg = color_code(optarg);
break;
default:
usage();
}
}
#if HAVE_USE_DEFAULT_COLORS && HAVE_ASSUME_DEFAULT_COLORS
if (a_option && d_option) {
fprintf(stderr, "Use either -a or -d option, but not both\n");
ExitProgram(EXIT_FAILURE);
}
#endif
initscr();
cbreak();
noecho();
if (has_colors()) {
start_color();
#if HAVE_USE_DEFAULT_COLORS
if (d_option) {
printw("Using default colors...\n");
use_default_colors();
if (d_option > 1) {
default_fg = -1;
default_bg = -1;
}
}
#endif
#if HAVE_ASSUME_DEFAULT_COLORS
if (a_option) {
printw("Using assumed colors %s/%s...\n",
color_name(default_fg),
color_name(default_bg));
assume_default_colors(default_fg, default_bg);
if (a_option > 1) {
default_fg = -1;
default_bg = -1;
}
}
#endif
test_background();
} else {
printw("This demo requires a color terminal");
getch();
}
endwin();
ExitProgram(EXIT_SUCCESS);
}
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