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 */
38 static char *status_buf = NULL;
39 static int status_bufsize = -1;
40 static int status_row;
41 static 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 */
47 void
status_printf(const char * fmt,...)48 status_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 */
102 void
status_free(void)103 status_free(void)
104 {
105 if (status_buf != NULL) {
106 free(status_buf);
107 status_buf = NULL;
108 }
109 }
110