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Make truncate_and_trailoff a bit more clear

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Co-Authored-By: Max Brunsfeld <maxbrunsfeld@gmail.com>
This commit is contained in:
Petros Amoiridis 2023-02-07 20:06:20 +02:00
parent 9bff82f161
commit e15ffc8560
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1 changed files with 8 additions and 11 deletions
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19
crates/util/src/lib.rs
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@ -46,10 +46,10 @@ pub fn truncate(s: &str, max_chars: usize) -> &str {
pub fn truncate_and_trailoff(s: &str, max_chars: usize) -> String {
debug_assert!(max_chars >= 5);
if s.len() > max_chars {
format!("{}…", truncate(s, max_chars.saturating_sub(3)))
} else {
s.to_string()
let truncation_ix = s.char_indices().map(|(i, _)| i).nth(max_chars);
match truncation_ix {
Some(length) => s[..length].to_string() + "…",
None => s.to_string(),
}
}
@ -279,12 +279,9 @@ mod tests {
#[test]
fn test_trancate_and_trailoff() {
const MAX_CHARS: usize = 24;
assert_eq!(
truncate_and_trailoff("ajouter un compte d'èèèès", MAX_CHARS),
"ajouter un compte d'è…"
);
assert_eq!(truncate_and_trailoff("ajouter", MAX_CHARS), "ajouter");
assert_eq!(truncate_and_trailoff("", MAX_CHARS), "");
assert_eq!(truncate_and_trailoff("", 5), "");
assert_eq!(truncate_and_trailoff("èèèèèè", 7), "èèèèèè");
assert_eq!(truncate_and_trailoff("èèèèèè", 6), "èèèèèè");
assert_eq!(truncate_and_trailoff("èèèèèè", 5), "èèèèè…");
}
}