mirror of https://github.com/sharkdp/bat
Enable 8 bit color support, closes #11
parent
9435e16a1b
commit
38762c34d9
@ -0,0 +1,66 @@
|
||||
use std::fmt::Write;
|
||||
|
||||
use ansi_term::Colour::{Fixed, RGB};
|
||||
use syntect::highlighting;
|
||||
|
||||
/// Approximate a 24 bit color value by a 8 bit ANSI code
|
||||
fn rgb2ansi(r: u8, g: u8, b: u8) -> u8 {
|
||||
const BLACK: u8 = 16;
|
||||
const WHITE: u8 = 231;
|
||||
|
||||
if r == g && g == b {
|
||||
if r < 8 {
|
||||
BLACK
|
||||
} else if r > 248 {
|
||||
WHITE
|
||||
} else {
|
||||
let fr = r as f32;
|
||||
(((fr - 8.) / 247.) * 24.) as u8 + 232
|
||||
}
|
||||
} else {
|
||||
let fr = r as f32;
|
||||
let fg = g as f32;
|
||||
let fb = b as f32;
|
||||
16 + (36 * (fr / 255. * 5.) as u8) + (6 * (fg / 255. * 5.) as u8) + (fb / 255. * 5.) as u8
|
||||
}
|
||||
}
|
||||
|
||||
pub fn as_terminal_escaped(v: &[(highlighting::Style, &str)], true_color: bool) -> String {
|
||||
let mut s: String = String::new();
|
||||
for &(ref style, text) in v.iter() {
|
||||
let style = if true_color {
|
||||
RGB(style.foreground.r, style.foreground.g, style.foreground.b)
|
||||
} else {
|
||||
let ansi = rgb2ansi(style.foreground.r, style.foreground.g, style.foreground.b);
|
||||
Fixed(ansi)
|
||||
};
|
||||
|
||||
write!(s, "{}", style.paint(text)).unwrap();
|
||||
}
|
||||
|
||||
s
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_rgb2ansi_black_white() {
|
||||
assert_eq!(16, rgb2ansi(0x00, 0x00, 0x00));
|
||||
assert_eq!(231, rgb2ansi(0xff, 0xff, 0xff));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_rgb2ansi_gray() {
|
||||
assert_eq!(241, rgb2ansi(0x6c, 0x6c, 0x6c));
|
||||
assert_eq!(233, rgb2ansi(0x1c, 0x1c, 0x1c));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_rgb2ansi_color() {
|
||||
assert_eq!(96, rgb2ansi(0x87, 0x5f, 0x87));
|
||||
assert_eq!(141, rgb2ansi(0xaf, 0x87, 0xff));
|
||||
assert_eq!(193, rgb2ansi(0xd7, 0xff, 0xaf));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_rgb2ansi_approx() {
|
||||
assert_eq!(231, rgb2ansi(0xfe, 0xfe, 0xfe));
|
||||
}
|
Loading…
Reference in New Issue