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Type: no Japanese–Latin space next to Hangul compatibility or half-width jamo

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Follow-up to #370: Hangul Compatibility Jamo (U+3130–318F, ㄱ ㅏ) and
half-width Hangul (U+FFA0–FFDC) counted as Japanese letters, so a Latin
letter next to them took the quarter em. They are left out like Hangul
syllables; the test covers both.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
imachus
2026-10-08 08:29:07 +07:00
committed by bflatastic
co-authored by Claude Opus 5.5
parent f5183da3dd
commit 6952780c1f
1 changed files with 6 additions and 2 deletions
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crates/text/src/layout.rs
+6 -2
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@@ -281,7 +281,10 @@ fn is_japanese_letter(c: char) -> bool {
return true;
}
is_cjk(c)
&& !matches!(c as u32, 0x3000..=0x303F | 0xAC00..=0xD7AF | 0xFF01..=0xFF0F | 0xFF1A..=0xFF20 | 0xFF3B..=0xFF40 | 0xFF5B..=0xFF65)
&& !matches!(
c as u32,
0x3000..=0x303F | 0x3130..=0x318F | 0xAC00..=0xD7AF | 0xFF01..=0xFF0F | 0xFF1A..=0xFF20 | 0xFF3B..=0xFF40 | 0xFF5B..=0xFF65 | 0xFFA0..=0xFFDC
)
&& c != '・'
&& punct(c).is_none()
}
@@ -818,7 +821,8 @@ fn japanese_letters_for_the_latin_space_are_kana_kanji_and_marks_not_hangul_or_p
for c in ['あ', 'カ', '漢', '々', '〆', '〇', 'Ａ'] {
assert!(is_japanese_letter(c), "{c}");
}
for c in ['한', '。', '「', '・', '、', 'a'] {
// Hangul in every form: syllables, compatibility jamo (ㄱ ㅏ), half-width jamo (ﾡ).
for c in ['한', 'ㄱ', 'ㅏ', '\u{FFA1}', '。', '「', '・', '、', 'a'] {
assert!(!is_japanese_letter(c), "{c}");
}
}