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vendor/yomitan/js/language/yi/yiddish-text-postprocessors.js

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+/*
+ * Copyright (C) 2024-2025  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/>.
+ */
+
+
+const final_letter_map = new Map([
+    ['\u05de', '\u05dd'], // מ to ם
+    ['\u05e0', '\u05df'], // נ to ן
+    ['\u05e6', '\u05e5'], // צ to ץ
+    ['\u05e4', '\u05e3'], // פ to ף
+    ['\u05dB', '\u05da'], // כ to ך
+]);
+
+const ligatures = [
+    {lig: '\u05f0', split: '\u05d5' + '\u05d5'}, // װ -> וו
+    {lig: '\u05f1', split: '\u05d5' + '\u05d9'}, // ױ -> וי
+    {lig: '\u05f2', split: '\u05d9' + '\u05d9'}, // ײ -> יי
+    {lig: '\ufb1d', split: '\u05d9' + '\u05b4'}, // יִ -> יִ
+    {lig: '\ufb1f', split: '\u05d9' + '\u05d9' + '\u05b7'}, // ײַ -> ייַ
+    {lig: '\ufb2e', split: '\u05d0' + '\u05b7'}, // Pasekh alef
+    {lig: '\ufb2f', split: '\u05d0' + '\u05b8'}, // Komets alef
+];
+
+/** @type {import('language').TextProcessor<boolean>} */
+export const convertFinalLetters = {
+    name: 'Convert to Final Letters',
+    description: 'קויף → קויפֿ',
+    options: [true],
+    process: (str) => {
+        const len = str.length - 1;
+        if ([...final_letter_map.keys()].includes(str.charAt(len))) {
+            str = str.substring(0, len) + final_letter_map.get(str.substring(len));
+        }
+        return str;
+    },
+};
+
+/** @type {import('language').BidirectionalConversionPreprocessor} */
+export const convertYiddishLigatures = {
+    name: 'Split Ligatures',
+    description: 'וו → װ',
+    options: ['off', 'direct', 'inverse'],
+    process: (str, setting) => {
+        switch (setting) {
+            case 'off':
+                return str;
+            case 'direct':
+                for (const ligature of ligatures) {
+                    str = str.replace(ligature.lig, ligature.split);
+                }
+                return str;
+            case 'inverse':
+                for (const ligature of ligatures) {
+                    str = str.replace(ligature.split, ligature.lig);
+                }
+                return str;
+        }
+    },
+};