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authortoasted-nutbread <toasted-nutbread@users.noreply.github.com>2020-03-27 22:53:45 -0400
committerGitHub <noreply@github.com>2020-03-27 22:53:45 -0400
commita0c4ce779d35cab39c62ca42ad3fe58a82faa1bb (patch)
treecd5cdae9d1a7aa48c11668a30758c72e4decedc7 /ext/mixed/js/japanese.js
parent08d38d8db2c97ff9f016a6de640f645b609088d1 (diff)
parent780d23b749325da0a95aa9cc7898df19f2ac1b31 (diff)
Merge pull request #413 from toasted-nutbread/japanese-utility
Convert Japanese utilities to a module-like style
Diffstat (limited to 'ext/mixed/js/japanese.js')
-rw-r--r--ext/mixed/js/japanese.js124
1 files changed, 124 insertions, 0 deletions
diff --git a/ext/mixed/js/japanese.js b/ext/mixed/js/japanese.js
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+/*
+ * Copyright (C) 2020 Alex Yatskov <alex@foosoft.net>
+ * Author: Alex Yatskov <alex@foosoft.net>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+const jp = (() => {
+ const HIRAGANA_RANGE = [0x3040, 0x309f];
+ const KATAKANA_RANGE = [0x30a0, 0x30ff];
+ const KANA_RANGES = [HIRAGANA_RANGE, KATAKANA_RANGE];
+
+ const CJK_UNIFIED_IDEOGRAPHS_RANGE = [0x4e00, 0x9fff];
+ const CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A_RANGE = [0x3400, 0x4dbf];
+ const CJK_UNIFIED_IDEOGRAPHS_EXTENSION_B_RANGE = [0x20000, 0x2a6df];
+ const CJK_UNIFIED_IDEOGRAPHS_EXTENSION_C_RANGE = [0x2a700, 0x2b73f];
+ const CJK_UNIFIED_IDEOGRAPHS_EXTENSION_D_RANGE = [0x2b740, 0x2b81f];
+ const CJK_UNIFIED_IDEOGRAPHS_EXTENSION_E_RANGE = [0x2b820, 0x2ceaf];
+ const CJK_UNIFIED_IDEOGRAPHS_EXTENSION_F_RANGE = [0x2ceb0, 0x2ebef];
+ const CJK_COMPATIBILITY_IDEOGRAPHS_SUPPLEMENT_RANGE = [0x2f800, 0x2fa1f];
+ const CJK_UNIFIED_IDEOGRAPHS_RANGES = [
+ CJK_UNIFIED_IDEOGRAPHS_RANGE,
+ CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A_RANGE,
+ CJK_UNIFIED_IDEOGRAPHS_EXTENSION_B_RANGE,
+ CJK_UNIFIED_IDEOGRAPHS_EXTENSION_C_RANGE,
+ CJK_UNIFIED_IDEOGRAPHS_EXTENSION_D_RANGE,
+ CJK_UNIFIED_IDEOGRAPHS_EXTENSION_E_RANGE,
+ CJK_UNIFIED_IDEOGRAPHS_EXTENSION_F_RANGE,
+ CJK_COMPATIBILITY_IDEOGRAPHS_SUPPLEMENT_RANGE
+ ];
+
+ // Japanese character ranges, roughly ordered in order of expected frequency
+ const JAPANESE_RANGES = [
+ HIRAGANA_RANGE,
+ KATAKANA_RANGE,
+
+ ...CJK_UNIFIED_IDEOGRAPHS_RANGES,
+
+ [0xff66, 0xff9f], // Halfwidth katakana
+
+ [0x30fb, 0x30fc], // Katakana punctuation
+ [0xff61, 0xff65], // Kana punctuation
+ [0x3000, 0x303f], // CJK punctuation
+
+ [0xff10, 0xff19], // Fullwidth numbers
+ [0xff21, 0xff3a], // Fullwidth upper case Latin letters
+ [0xff41, 0xff5a], // Fullwidth lower case Latin letters
+
+ [0xff01, 0xff0f], // Fullwidth punctuation 1
+ [0xff1a, 0xff1f], // Fullwidth punctuation 2
+ [0xff3b, 0xff3f], // Fullwidth punctuation 3
+ [0xff5b, 0xff60], // Fullwidth punctuation 4
+ [0xffe0, 0xffee] // Currency markers
+ ];
+
+
+ // Character code testing functions
+
+ function isCodePointKanji(codePoint) {
+ return isCodePointInRanges(codePoint, CJK_UNIFIED_IDEOGRAPHS_RANGES);
+ }
+
+ function isCodePointKana(codePoint) {
+ return isCodePointInRanges(codePoint, KANA_RANGES);
+ }
+
+ function isCodePointJapanese(codePoint) {
+ return isCodePointInRanges(codePoint, JAPANESE_RANGES);
+ }
+
+ function isCodePointInRanges(codePoint, ranges) {
+ for (const [min, max] of ranges) {
+ if (codePoint >= min && codePoint <= max) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+
+ // String testing functions
+
+ function isStringEntirelyKana(str) {
+ if (str.length === 0) { return false; }
+ for (const c of str) {
+ if (!isCodePointKana(c.codePointAt(0))) {
+ return false;
+ }
+ }
+ return true;
+ }
+
+ function isStringPartiallyJapanese(str) {
+ if (str.length === 0) { return false; }
+ for (const c of str) {
+ if (isCodePointJapanese(c.codePointAt(0))) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+
+ // Exports
+
+ return {
+ isCodePointKanji,
+ isCodePointKana,
+ isCodePointJapanese,
+ isStringEntirelyKana,
+ isStringPartiallyJapanese
+ };
+})();