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/****************************************************************************
* Copyright 2019-2020,2022 Thomas E. Dickey *
* *
* 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. *
****************************************************************************/
/*
* Author: Thomas E. Dickey
*
* $Id: demo_tabs.c,v 1.10 2022/12/04 00:40:11 tom Exp $
*
* A simple demo of tabs in curses.
*/
#define USE_CURSES
#define USE_TINFO
#include <test.priv.h>
static void
usage(int ok)
{
static const char *msg[] =
{
"Usage: demo_tabs [options]"
,""
,"Print a grid to test tab-stops with the curses interface"
,""
,USAGE_COMMON
,"Options:"
," -l COUNT total number of lines to show"
," -t NUM set TABSIZE variable to the given value"
};
unsigned n;
for (n = 0; n < SIZEOF(msg); ++n) {
fprintf(stderr, "%s\n", msg[n]);
}
ExitProgram(ok ? EXIT_SUCCESS : EXIT_FAILURE);
}
/* *INDENT-OFF* */
VERSION_COMMON()
/* *INDENT-ON* */
int
main(int argc, char *argv[])
{
int tabstop;
int ch, col, row, step;
int line_limit = -1;
int curses_stops = -1;
while ((ch = getopt(argc, argv, OPTS_COMMON "l:t:")) != -1) {
switch (ch) {
case 'l':
line_limit = atoi(optarg);
break;
case 't':
curses_stops = atoi(optarg);
break;
case OPTS_VERSION:
show_version(argv);
ExitProgram(EXIT_SUCCESS);
default:
usage(ch == OPTS_USAGE);
/* NOTREACHED */
}
}
initscr();
noecho();
cbreak();
if (curses_stops > 0)
set_tabsize(curses_stops);
#if HAVE_TIGETNUM
tabstop = tigetnum("it");
if (tabstop <= 0)
#endif
tabstop = 8;
for (row = 0; row < LINES; ++row) {
move(row, 0);
for (col = step = 0; col < COLS - 1; ++col) {
if (row == 0) {
chtype ct = '-';
if ((col % tabstop) == 0)
ct = '+';
addch(ct);
} else if (col + 1 < row) {
addch('*');
} else {
printw("%x", step);
col = (row + (tabstop * ++step));
col /= tabstop;
col *= tabstop;
col -= 1;
if ((col + tabstop) < COLS)
addch('\t');
refresh();
}
}
addch('\n');
if (line_limit > 0 && row >= line_limit)
break;
}
getch();
endwin();
ExitProgram(EXIT_SUCCESS);
}
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