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Fix "-0p0" for tiny negative pica/cicero values

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Found while testing crates/geom/src/units.rs:276

Co-Authored-By: Claude Haiku 5.5 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
This commit is contained in:
NetterSilver
2026-10-20 12:39:05 +00:00
co-authored by Claude Haiku 5.5
parent 15a2f3c8c8
commit 9887272efb
1 changed files with 10 additions and 0 deletions
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crates/geom/src/units.rs
+10
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@@ -286,6 +286,8 @@ pub fn format_measure_prec(pt: f64, unit: Unit, decimals: usize) -> String {
whole += 1.0;
rest = 0.0;
}
// Decide the sign from the rounded value so float noise doesn't print "-0p0".
let neg = neg && (whole > 0.0 || rest > 0.0);
let sep = if unit == Unit::Picas { 'p' } else { 'c' };
format!("{}{}{}{}", if neg { "-" } else { "" }, whole as i64, sep, trim(rest))
}
@@ -304,6 +306,14 @@ mod tests {
(a - b).abs() < 1e-6
}
/// Tiny negatives that round to zero must not print a sign.
#[test]
fn tiny_negative_picas_ciceros_have_no_sign() {
assert_eq!(format_measure(-0.0004, Unit::Picas), "0p0");
assert_eq!(format_measure(-0.0004, Unit::Ciceros), "0c0");
assert_eq!(format_measure(-12.0, Unit::Picas), "-1p0");
}
/// Inches show four decimals, as InDesign's fields do; other units three.
#[test]
fn inches_show_four_decimals() {