exa/src/output/escape.rs

use ansi_term::{ANSIString, Style};


pub fn escape(string: String, bits: &mut Vec<ANSIString<'_>>, good: Style, bad: Style) {
    if string.chars().all(|c| c >= 0x20 as char && c != 0x7f as char) {
        bits.push(good.paint(string));
        return;
    }

    for c in string.chars() {
        // The `escape_default` method on `char` is *almost* what we want here, but
        // it still escapes non-ASCII UTF-8 characters, which are still printable.

        if c >= 0x20 as char && c != 0x7f as char {
            // TODO: This allocates way too much,
            // hence the `all` check above.
            let mut s = String::new();
            s.push(c);
            bits.push(good.paint(s));
        }
        else {
            let s = c.escape_default().collect::<String>();
            bits.push(bad.paint(s));
        }
    }
}