1/*-
2 * Copyright (c) 2013-2014 Devin Teske <dteske@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28#include <curses.h>
29#include <dialog.h>
30#include <stdarg.h>
31#include <stdlib.h>
32#include <string.h>
33
34#include "dialog_util.h"
35#include "status.h"
36
37/* static globals */
38static char *status_buf = NULL;
39static int status_bufsize = -1;
40static int status_row;
41static int status_width;
42
43/*
44 * Print a `one-liner' status message at the bottom of the screen. Messages are
45 * trimmed to fit within the console length (ANSI coloring not accounted for).
46 */
47void
48status_printf(const char *fmt, ...)
49{
50	int n, attrs;
51	chtype color = dlg_color_pair(dlg_color_table[BUTTON_ACTIVE_ATTR].fg,
52	    dlg_color_table[SCREEN_ATTR].bg) | A_BOLD;
53	va_list args;
54
55	status_row = tty_maxrows() - 1;
56	status_width = tty_maxcols();
57
58	/* NULL is a special convention meaning "erase the old stuff" */
59	if (fmt == NULL) {
60		move(status_row, 0);
61		clrtoeol();
62		return;
63	}
64
65	/* Resize buffer if terminal width is greater */
66	if ((status_width + 1) > status_bufsize) {
67		status_buf = realloc(status_buf, status_width + 1);
68		if (status_buf == NULL) {
69			status_bufsize = -1;
70			return;
71		}
72		status_bufsize = status_width + 1;
73	}
74
75	/* Print the message within a space-filled buffer */
76	memset(status_buf, ' ', status_width);
77	va_start(args, fmt);
78	n = vsnprintf(status_buf, status_width + 1, fmt, args);
79	va_end(args);
80
81	/* If vsnprintf(3) produced less bytes than the maximum, change the
82	 * implicitly-added NUL-terminator into a space and terminate at max */
83	if (n < status_width) {
84		status_buf[n] = ' ';
85		status_buf[status_width] = '\0';
86	}
87
88	/* Print text in screen bg, button active fg, and bold */
89	attrs = getattrs(stdscr);
90	attrset(color);
91	mvaddstr(status_row, 0, status_buf);
92	attrset(attrs);
93
94	/* Seat the cursor over the last character at absolute lower-right */
95	move(status_row, status_width - 1);
96	refresh();
97}
98
99/*
100 * Free allocated items initialized by status_printf()
101 */
102void
103status_free(void)
104{
105	if (status_buf != NULL) {
106		free(status_buf);
107		status_buf = NULL;
108	}
109}
110