1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
|
// Copyright (C) 2019 Robin Krahl <robin.krahl@ireas.org>
// SPDX-License-Identifier: MIT
use std::io;
use std::io::Result;
use std::process;
use crate::Message;
/// The `dialog` backend.
///
/// This backend uses the external `dialog` program (not to be confused with this crate also called
/// `dialog`) to display text-based dialog boxes in the terminal.
#[derive(Debug)]
pub struct Dialog {
backtitle: Option<String>,
width: String,
height: String,
}
impl Dialog {
/// Creates a new `Dialog` instance without configuration.
pub fn new() -> Dialog {
Dialog {
backtitle: None,
height: "0".to_string(),
width: "0".to_string(),
}
}
fn execute(&self, args: Vec<&str>) -> Result<process::Output> {
let mut args = args;
if let Some(ref backtitle) = self.backtitle {
args.insert(0, "--backtitle");
args.insert(1, backtitle);
}
println!("{:?}", args);
process::Command::new("dialog")
.args(args)
.stdin(process::Stdio::inherit())
.stdout(process::Stdio::inherit())
.output()
}
/// Sets the backtitle for the dialog boxes.
///
/// The backtitle is displayed on the backdrop, at the top of the screen.
pub fn set_backtitle(&mut self, backtitle: impl Into<String>) {
self.backtitle = Some(backtitle.into());
}
/// Sets the height of the dialog boxes.
///
/// The height is given in characters. The actual height of the dialog box might be higher
/// than the given height if the content would not fit otherwise. The default height is zero.
pub fn set_height(&mut self, height: u32) {
self.height = height.to_string();
}
/// Sets the width of the dialog boxes.
///
/// The width is given in characters. The actual width of the dialog box might be higher than
/// the given width if the content would not fit otherwise. The default width is zero.
pub fn set_width(&mut self, width: u32) {
self.width = width.to_string();
}
fn show_box(&self, args: Vec<&str>, title: &Option<String>) -> Result<process::Output> {
let mut args = args;
if let Some(ref title) = title {
args.insert(0, "--title");
args.insert(1, title);
}
args.push(&self.height);
args.push(&self.width);
self.execute(args)
}
}
fn require_success(status: process::ExitStatus) -> Result<()> {
if status.success() {
Ok(())
} else {
Err(io::Error::new(io::ErrorKind::Other, "dialog failed"))
}
}
impl super::Backend for Dialog {
fn show_message(&self, message: &Message) -> Result<()> {
let args = vec!["--msgbox", &message.text];
self.show_box(args, &message.title)
.and_then(|output| require_success(output.status))
.map(|_| ())
}
}
|
