blob: 4766dcdb634e5a8007efdba51c6e444e200adcdd (
plain)
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
|
extern crate nu_ansi_term;
use nu_ansi_term::Color;
// This example prints out the 256 colors.
// They're arranged like this:
//
// - 0 to 8 are the eight standard colors.
// - 9 to 15 are the eight bold colors.
// - 16 to 231 are six blocks of six-by-six color squares.
// - 232 to 255 are shades of grey.
fn main() {
// First two lines
for c in 0..8 {
glow(c, c != 0);
print!(" ");
}
println!();
for c in 8..16 {
glow(c, c != 8);
print!(" ");
}
println!("\n");
// Six lines of the first three squares
for row in 0..6 {
for square in 0..3 {
for column in 0..6 {
glow(16 + square * 36 + row * 6 + column, row >= 3);
print!(" ");
}
print!(" ");
}
println!();
}
println!();
// Six more lines of the other three squares
for row in 0..6 {
for square in 0..3 {
for column in 0..6 {
glow(124 + square * 36 + row * 6 + column, row >= 3);
print!(" ");
}
print!(" ");
}
println!();
}
println!();
// The last greyscale lines
for c in 232..=243 {
glow(c, false);
print!(" ");
}
println!();
for c in 244..=255 {
glow(c, true);
print!(" ");
}
println!();
}
fn glow(c: u8, light_bg: bool) {
let base = if light_bg { Color::Black } else { Color::White };
let style = base.on(Color::Fixed(c));
print!("{}", style.paint(&format!(" {:3} ", c)));
}
|
