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__FBSDID("$FreeBSD$");
29
30#include <curses.h>
31#include <dialog.h>
32#include <stdarg.h>
33#include <stdlib.h>
34#include <string.h>
35
36#include "dialog_util.h"
37#include "status.h"
38
39/* static globals */
40static char *status_buf = NULL;
41static int status_bufsize = -1;
42static int status_row;
43static int status_width;
44
45/*
46 * Print a `one-liner' status message at the bottom of the screen. Messages are
47 * trimmed to fit within the console length (ANSI coloring not accounted for).
48 */
49void
50status_printf(const char *fmt, ...)
51{
52	int n, attrs;
53	chtype color = dlg_color_pair(dlg_color_table[BUTTON_ACTIVE_ATTR].fg,
54	    dlg_color_table[SCREEN_ATTR].bg) | A_BOLD;
55	va_list args;
56
57	status_row = tty_maxrows() - 1;
58	status_width = tty_maxcols();
59
60	/* NULL is a special convention meaning "erase the old stuff" */
61	if (fmt == NULL) {
62		move(status_row, 0);
63		clrtoeol();
64		return;
65	}
66
67	/* Resize buffer if terminal width is greater */
68	if ((status_width + 1) > status_bufsize) {
69		status_buf = realloc(status_buf, status_width + 1);
70		if (status_buf == NULL) {
71			status_bufsize = -1;
72			return;
73		}
74		status_bufsize = status_width + 1;
75	}
76
77	/* Print the message within a space-filled buffer */
78	memset(status_buf, ' ', status_width);
79	va_start(args, fmt);
80	n = vsnprintf(status_buf, status_width + 1, fmt, args);
81	va_end(args);
82
83	/* If vsnprintf(3) produced less bytes than the maximum, change the
84	 * implicitly-added NUL-terminator into a space and terminate at max */
85	if (n < status_width) {
86		status_buf[n] = ' ';
87		status_buf[status_width] = '\0';
88	}
89
90	/* Print text in screen bg, button active fg, and bold */
91	attrs = getattrs(stdscr);
92	attrset(color);
93	mvaddstr(status_row, 0, status_buf);
94	attrset(attrs);
95
96	/* Seat the cursor over the last character at absolute lower-right */
97	move(status_row, status_width - 1);
98	refresh();
99}
100
101/*
102 * Free allocated items initialized by status_printf()
103 */
104void
105status_free(void)
106{
107	if (status_buf != NULL) {
108		free(status_buf);
109		status_buf = NULL;
110	}
111}
112