qrsimple_cli/
array.rs

1use crate::error::MyResult;
2use conv::{ConvUtil, RoundToNearest};
3use qrcode::{Color, QrCode};
4
5const FULL_BLOCK: char = '\u{2588}';
6const UPPER_BLOCK: char = '\u{2580}';
7const LOWER_BLOCK: char = '\u{2584}';
8
9pub struct Array {
10    colors: Vec<Color>,
11    size: usize,
12}
13
14impl Array {
15    pub fn new(code: QrCode) -> MyResult<Array> {
16        let colors = code.to_colors();
17        let size = colors.len() as f64;
18        let size = size.sqrt().approx_as_by::<usize, RoundToNearest>()?;
19        let array = Array { colors, size };
20        Ok(array)
21    }
22
23    pub fn print(&self) {
24        println!();
25        for row in (0..self.size).step_by(2) {
26            print!("  ");
27            for col in 0..self.size {
28                let upper = self.get_color(row, col);
29                let lower = self.get_color(row + 1, col);
30                match (upper, lower) {
31                    (Color::Light, Color::Light) => print!(" "),
32                    (Color::Light, Color::Dark) => print!("{}", LOWER_BLOCK),
33                    (Color::Dark, Color::Light) => print!("{}", UPPER_BLOCK),
34                    (Color::Dark, Color::Dark) => print!("{}", FULL_BLOCK),
35                }
36            }
37            println!();
38        }
39        println!();
40    }
41
42    fn get_color(&self, row: usize, col: usize) -> Color {
43        let index = (row * self.size) + col;
44        if index < self.colors.len() { self.colors[index] } else { Color::Light }
45    }
46}
qrsimple_cli/array.rs

qrsimple_cli/
array.rs
