apt_release_file/
image_size.rs

1use std::str::FromStr;
2
3/// The size of an icon package. IE: `48x48@2`
4#[derive(Debug, Clone, Hash, PartialEq)]
5pub struct ImageSize {
6    pub pixels: u16,
7    pub hidpi: u16,
8}
9
10impl FromStr for ImageSize {
11    type Err = &'static str;
12
13    fn from_str(input: &str) -> Result<Self, Self::Err> {
14        input
15            .find('x')
16            .ok_or("not a recognizable image string")
17            .and_then(|pos| {
18                let x = &input[..pos];
19                let y = &input[pos + 1..];
20                match y.find('@') {
21                    Some(pos) => {
22                        let z = &y[pos + 1..];
23                        let y = &y[..pos];
24
25                        match (x.parse::<u16>(), y.parse::<u16>(), z.parse::<u16>()) {
26                            (Ok(pixels), Ok(y), Ok(hidpi)) => if pixels == y {
27                                Ok(ImageSize { pixels, hidpi })
28                            } else {
29                                Err("width and height do not match")
30                            },
31                            _ => Err("width, height, and/or scale did not parse as integers"),
32                        }
33                    }
34                    None => match (x.parse::<u16>(), y.parse::<u16>()) {
35                        (Ok(pixels), Ok(y)) => if pixels == y {
36                            Ok(ImageSize { pixels, hidpi: 0 })
37                        } else {
38                            Err("width and height do not match")
39                        },
40                        _ => Err("width and/or height failed to parse as integers"),
41                    },
42                }
43            })
44    }
45}
apt_release_file/image_size.rs

apt_release_file/
image_size.rs
