1 files changed, 40 insertions, 0 deletions
diff --git a/ext/mixed/js/japanese.js b/ext/mixed/js/japanese.js
new file mode 100644
index 00000000..c11e955b
--- /dev/null
+++ b/ext/mixed/js/japanese.js
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2016  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 <http://www.gnu.org/licenses/>.
+ */
+
+
+function jpIsKanji(c) {
+    const code = c.charCodeAt(0);
+    return code >= 0x4e00 && code < 0x9fb0 || code >= 0x3400 && code < 0x4dc0;
+}
+
+function jpIsKana(c) {
+    return wanakana.isKana(c);
+}
+
+function jpKatakanaToHiragana(text) {
+    let result = '';
+    for (const c of text) {
+        if (wanakana.isKatakana(c)) {
+            result += wanakana.toHiragana(c);
+        } else {
+            result += c;
+        }
+    }
+
+    return result;
+}