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64 lines
2.3 KiB
Rust
64 lines
2.3 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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pub use crate::unicode_block::{UnicodeBlock, UnicodeBlockMethod};
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pub fn is_bidi_control(c: char) -> bool {
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matches!(c, '\u{202A}'..='\u{202E}' | '\u{2066}'..='\u{2069}' | '\u{200E}' | '\u{200F}' | '\u{061C}')
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}
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pub fn unicode_plane(codepoint: char) -> u32 {
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(codepoint as u32) >> 16
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}
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pub fn is_cjk(codepoint: char) -> bool {
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if let Some(
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UnicodeBlock::CJKRadicalsSupplement |
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UnicodeBlock::KangxiRadicals |
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UnicodeBlock::IdeographicDescriptionCharacters |
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UnicodeBlock::CJKSymbolsandPunctuation |
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UnicodeBlock::Hiragana |
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UnicodeBlock::Katakana |
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UnicodeBlock::Bopomofo |
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UnicodeBlock::HangulCompatibilityJamo |
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UnicodeBlock::Kanbun |
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UnicodeBlock::BopomofoExtended |
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UnicodeBlock::CJKStrokes |
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UnicodeBlock::KatakanaPhoneticExtensions |
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UnicodeBlock::EnclosedCJKLettersandMonths |
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UnicodeBlock::CJKCompatibility |
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UnicodeBlock::CJKUnifiedIdeographsExtensionA |
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UnicodeBlock::YijingHexagramSymbols |
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UnicodeBlock::CJKUnifiedIdeographs |
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UnicodeBlock::CJKCompatibilityIdeographs |
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UnicodeBlock::CJKCompatibilityForms |
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UnicodeBlock::HalfwidthandFullwidthForms,
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) = codepoint.block()
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{
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return true;
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}
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// https://en.wikipedia.org/wiki/Plane_(Unicode)#Supplementary_Ideographic_Plane
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// https://en.wikipedia.org/wiki/Plane_(Unicode)#Tertiary_Ideographic_Plane
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unicode_plane(codepoint) == 2 || unicode_plane(codepoint) == 3
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}
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#[test]
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fn test_is_cjk() {
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// Test characters from different CJK blocks
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assert_eq!(is_cjk('〇'), true);
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assert_eq!(is_cjk('㐀'), true);
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assert_eq!(is_cjk('あ'), true);
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assert_eq!(is_cjk('ア'), true);
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assert_eq!(is_cjk('㆒'), true);
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assert_eq!(is_cjk('ㆣ'), true);
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assert_eq!(is_cjk('龥'), true);
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assert_eq!(is_cjk('𰾑'), true);
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assert_eq!(is_cjk('𰻝'), true);
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// Test characters from outside CJK blocks
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assert_eq!(is_cjk('a'), false);
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assert_eq!(is_cjk('🙂'), false);
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assert_eq!(is_cjk('©'), false);
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}
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