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