rhd/src/colormap.rs

extern crate termion;

use termion::color;

const COLOR_RESET: color::Fg<color::Reset> = color::Fg(color::Reset);
const COLOR_SYMBOLS: color::Fg<color::LightGreen> = color::Fg(color::LightGreen);
const COLOR_TEXT: color::Fg<color::Cyan> = color::Fg(color::Cyan);
const COLOR_NUMBERS: color::Fg<color::LightBlue> = color::Fg(color::LightBlue);
const COLOR_OTHER: color::Fg<color::Yellow> = color::Fg(color::Yellow);

pub fn map_u8_to_color(data: u8) -> String {
    if super::isatty() {
        match data {
            32..=47 => format!("{}{:02x}{}", COLOR_SYMBOLS, data, COLOR_RESET),
            48..=57 => format!("{}{:02x}{}", COLOR_NUMBERS, data, COLOR_RESET),
            58..=64 => format!("{}{:02x}{}", COLOR_SYMBOLS, data, COLOR_RESET),
            65..=90 => format!("{}{:02x}{}", COLOR_TEXT, data, COLOR_RESET),
            91..=96 => format!("{}{:02x}{}", COLOR_SYMBOLS, data, COLOR_RESET),
            97..=122 => format!("{}{:02x}{}", COLOR_TEXT, data, COLOR_RESET),
            123..=126 => format!("{}{:02x}{}", COLOR_SYMBOLS, data, COLOR_RESET),
            _ => format!(
                "{}{:02x}{}",
                COLOR_OTHER,
                data,
                COLOR_RESET
            ),
        }
    } else {
        format!("{:02x}", data)
    }
}

pub fn map_char_to_color(data: u8) -> String {
    if super::isatty() {
        match data {
            32..=47 => format!(
                "{}{}{}",
                COLOR_SYMBOLS,
                (data as char),
                COLOR_RESET
            ),
            48..=57 => format!(
                "{}{}{}",
                COLOR_NUMBERS,
                (data as char),
                COLOR_RESET
            ),
            58..=64 => format!(
                "{}{}{}",
                COLOR_SYMBOLS,
                (data as char),
                COLOR_RESET
            ),
            65..=90 => format!(
                "{}{}{}",
                COLOR_TEXT,
                (data as char),
                COLOR_RESET
            ),
            91..=96 => format!(
                "{}{}{}",
                COLOR_SYMBOLS,
                (data as char),
                COLOR_RESET
            ),
            97..=122 => format!(
                "{}{}{}",
                COLOR_TEXT,
                (data as char),
                COLOR_RESET
            ),
            123..=126 => format!(
                "{}{}{}",
                COLOR_SYMBOLS,
                (data as char),
                COLOR_RESET
            ),
            _ => format!(
                "{}.{}",
                COLOR_SYMBOLS,
                COLOR_RESET
            ),
        }
    } else {
        match data {
            32..=126 => format!("{}", (data as char)),
            _ => ".".to_string(),
        }
    }
}