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vendor/yomitan/js/language/el/modern-greek-processors.js

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+/*
+ * Copyright (C) 2025  Yomitan Authors
+ *
+ * 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/>.
+ */
+
+import {basicTextProcessorOptions} from '../text-processors.js';
+
+/** @type {import('language').TextProcessor<boolean>} */
+export const removeDoubleAcuteAccents = {
+    name: 'Remove double acute accents',
+    description: 'πρόσωπό → πρόσωπο',
+    options: basicTextProcessorOptions,
+    process: (str, setting) => {
+        return setting ? removeDoubleAcuteAccentsImpl(str) : str;
+    },
+};
+
+/**
+ * @param {string} word
+ * @returns {string}
+ */
+export function removeDoubleAcuteAccentsImpl(word) {
+    const ACUTE_ACCENT = '\u0301';
+    const decomposed = [...word.normalize('NFD')];
+
+    const firstIndex = decomposed.indexOf(ACUTE_ACCENT);
+    const updated = decomposed.filter((char, index) => char !== ACUTE_ACCENT || index === firstIndex);
+
+    return updated.join('').normalize('NFC');
+}