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Link words from Chinese Japanese and Korean #13

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Link words from Chinese Japanese and Korean #13

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2 changes: 2 additions & 0 deletions src/kebab.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -48,4 +48,6 @@ mod tests {
t!(test8: "this-contains_ ALLKinds OfWord_Boundaries" => "this-contains-all-kinds-of-word-boundaries");
t!(test9: "XΣXΣ baffle" => "xσxς-baffle");
t!(test10: "XMLHttpRequest" => "xml-http-request");
t!(test11: "白い悪魔が黒い天国と出会い歴史は紡がれる" => "白い悪魔が黒い天国と出会い歴史は紡がれる");
t!(test12: "汉语的标题" => "汉语的标题");
}
32 changes: 30 additions & 2 deletions src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -77,6 +77,7 @@ where

let mut out = String::new();
let mut first_word = true;
let mut can_link_last = false;

for word in s.unicode_words() {
let mut char_indices = word.char_indices().peekable();
Expand Down Expand Up @@ -108,6 +109,7 @@ where
if !first_word { boundary(&mut out); }
with_word(&word[init..next_i], &mut out);
first_word = false;
can_link_last = can_link(word);
init = next_i;
mode = WordMode::Boundary;

Expand All @@ -116,6 +118,7 @@ where
} else if mode == WordMode::Uppercase && c.is_uppercase() && next.is_lowercase() {
if !first_word { boundary(&mut out); }
else { first_word = false; }
can_link_last = can_link(word);
with_word(&word[init..i], &mut out);
init = i;
mode = WordMode::Boundary;
Expand All @@ -126,8 +129,13 @@ where
}
} else {
// Collect trailing characters as a word
if !first_word { boundary(&mut out); }
else { first_word = false; }
let can_link_next = can_link(word);
if !first_word {
if !(can_link_last && can_link_next) {
boundary(&mut out)
}
} else { first_word = false; }
can_link_last = can_link_next;
with_word(&word[init..], &mut out);
break;
}
Expand All @@ -137,6 +145,26 @@ where
out
}

fn can_link(word: &str) -> bool {
word.chars().map(u32::from)
.all(|c| {
in_range(0x4E00, 0x9FFF, c) || //CJK Unified Ideographs
in_range(0x3400, 0x4DFF, c) || //CJK Unified Ideographs Extension A
in_range(0x20000, 0x2A6DF, c) || //CJK Unified Ideographs Extension B
in_range(0x2A700, 0x2EBEF, c) || //CJK Unified Ideographs Extensions C, D, E & F
in_range(0x3300, 0x33FF, c) || //CJK Compatibility
in_range(0xFE30, 0xFE4F, c) || //CJK Compatibility Forms
in_range(0xF900, 0xFAFF, c) || //CJK Compatibility Ideographs
in_range(0x2F800, 0x2FA1F, c) || //CJK Compatibility Ideographs Supplement
in_range(0x303F, 0x319F, c) //Hiragana, Katakan, Bopomofo, Hangul & Kanboun
})
}

fn in_range(min: u32,max: u32, val: u32) -> bool {
val >= min && val <= max
}


fn lowercase(s: &str, out: &mut String) {
let mut chars = s.chars().peekable();
while let Some(c) = chars.next() {
Expand Down