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-/**
- * Copyright (c) 2013-present, Facebook, Inc.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- *
- * @typechecks
- */
-
-/**
- * Unicode algorithms for CJK (Chinese, Japanese, Korean) writing systems.
- *
- * Utilities for Hanzi/Kanji/Hanja logographs and Kanas (Katakana and Hiragana)
- * syllables.
- *
- * For Korean Hangul see module `UnicodeHangulKorean`.
- */
-
-'use strict';
-
-/**
- * Latin
- *
- * NOTE: The code assumes these sets include only BMP characters.
- */
-
-var R_LATIN_ASCII = 'a-zA-Z';
-var R_LATIN_FULLWIDTH = '\uFF21-\uFF3A\uFF41-\uFF5A';
-var R_LATIN = R_LATIN_ASCII + R_LATIN_FULLWIDTH;
-
-/**
- * Hiragana & Katakana
- *
- * NOTE: Some ranges include non-BMP characters. We do not support those ranges
- * for now.
- */
-var R_HIRAGANA = '\u3040-\u309F';
-var R_KATAKANA = '\u30A0-\u30FF';
-var R_KATAKANA_PHONETIC = '\u31F0-\u31FF';
-var R_KATAKANA_HALFWIDTH = '\uFF65-\uFF9F';
-// var R_KANA_SUPPLEMENT = '\U0001B000-\U0001B0FF';
-var R_KATAKANA_ALL = R_KATAKANA + R_KATAKANA_PHONETIC + R_KATAKANA_HALFWIDTH;
-var R_KANA = R_HIRAGANA + R_KATAKANA_ALL;
-
-var I_HIRAGANA = [0x3040, 0x309F];
-var I_KATAKANA = [0x30A0, 0x30FF];
-var I_HIRAGANA_TO_KATAKANA = I_KATAKANA[0] - I_HIRAGANA[0];
-
-/**
- * Hanzi/Kanji/Hanja
- *
- * NOTE: Some ranges include non-BMP characters. We do not support those ranges
- * for now.
- */
-var R_IDEO_MAIN = '\u4E00-\u9FCF';
-var R_IDEO_EXT_A = '\u3400-\u4DBF';
-// var R_IDEO_EXT_B = '\U00020000-\U0002A6DF';
-// var R_IDEO_EXT_C = '\U0002A700-\U0002B73F';
-// var R_IDEO_EXT_D = '\U0002B740-\U0002B81F';
-var R_IDEO = R_IDEO_MAIN + R_IDEO_EXT_A;
-
-/**
- * Hangul
- */
-// var R_HANGUL_JAMO = '\u1100-\u11FF';
-// var R_HANGUL_JAMO_EXT_A = '\uA960-\uA97F';
-// var R_HANGUL_JAMO_EXT_B = '\uD7B0-\uD7FF';
-// var R_HANGUL_COMPATIBILITY = '\u3130-\u318F';
-// var R_HANGUL_COMP_HALFWIDTH = '\uFFA0-\uFFDF';
-var R_HANGUL_SYLLABLES = '\uAC00-\uD7AF';
-
-/**
- * Globals
- */
-var R_IDEO_OR_SYLL = R_IDEO + R_KANA + R_HANGUL_SYLLABLES;
-
-var REGEX_IDEO = null;
-var REGEX_KANA = null;
-var REGEX_IDEO_OR_SYLL = null;
-var REGEX_IS_KANA_WITH_TRAILING_LATIN = null;
-
-/**
- * Whether the string includes any Katakana or Hiragana characters.
- *
- * @param {string} str
- * @return {boolean}
- */
-function hasKana(str) {
- REGEX_KANA = REGEX_KANA || new RegExp('[' + R_KANA + ']');
- return REGEX_KANA.test(str);
-}
-
-/**
- * Whether the string includes any CJK Ideograph characters.
- *
- * @param {string} str
- * @return {boolean}
- */
-function hasIdeograph(str) {
- REGEX_IDEO = REGEX_IDEO || new RegExp('[' + R_IDEO + ']');
- return REGEX_IDEO.test(str);
-}
-
-/**
- * Whether the string includes any CJK Ideograph or Syllable characters.
- *
- * @param {string} str
- * @return {boolean}
- */
-function hasIdeoOrSyll(str) {
- REGEX_IDEO_OR_SYLL = REGEX_IDEO_OR_SYLL || new RegExp('[' + R_IDEO_OR_SYLL + ']');
- return REGEX_IDEO_OR_SYLL.test(str);
-}
-
-/**
- * @param {string} chr
- * @output {string}
- */
-function charCodeToKatakana(chr) {
- var charCode = chr.charCodeAt(0);
- return String.fromCharCode(charCode < I_HIRAGANA[0] || charCode > I_HIRAGANA[1] ? charCode : charCode + I_HIRAGANA_TO_KATAKANA);
-}
-
-/**
- * Replace any Hiragana character with the matching Katakana
- *
- * @param {string} str
- * @output {string}
- */
-function hiraganaToKatakana(str) {
- if (!hasKana(str)) {
- return str;
- }
- return str.split('').map(charCodeToKatakana).join('');
-}
-
-/**
- * Whether the string is exactly a sequence of Kana characters followed by one
- * Latin character.
- *
- * @param {string} str
- * @output {string}
- */
-function isKanaWithTrailingLatin(str) {
- REGEX_IS_KANA_WITH_TRAILING_LATIN = REGEX_IS_KANA_WITH_TRAILING_LATIN || new RegExp('^' + '[' + R_KANA + ']+' + '[' + R_LATIN + ']' + '$');
- return REGEX_IS_KANA_WITH_TRAILING_LATIN.test(str);
-}
-
-/**
- * Drops the trailing Latin character from a string that is exactly a sequence
- * of Kana characters followed by one Latin character.
- *
- * @param {string} str
- * @output {string}
- */
-function kanaRemoveTrailingLatin(str) {
- if (isKanaWithTrailingLatin(str)) {
- return str.substr(0, str.length - 1);
- }
- return str;
-}
-
-var UnicodeCJK = {
- hasKana: hasKana,
- hasIdeograph: hasIdeograph,
- hasIdeoOrSyll: hasIdeoOrSyll,
- hiraganaToKatakana: hiraganaToKatakana,
- isKanaWithTrailingLatin: isKanaWithTrailingLatin,
- kanaRemoveTrailingLatin: kanaRemoveTrailingLatin
-};
-
-module.exports = UnicodeCJK; \ No newline at end of file