From 588b84ecd082680ddc6ffb93c783758f72fc4dd6 Mon Sep 17 00:00:00 2001
From: hax0r31337 <65506006+hax0r31337@users.noreply.github.com>
Date: Fri, 5 Sep 2025 15:30:39 +0800
Subject: [PATCH] feat(synced-lyrics): thai romanization (#3618)

Co-authored-by: Angelos Bouklis <me@arjix.dev>
Co-authored-by: JellyBrick <shlee1503@naver.com>
---
 package.json                                 |  2 +
 pnpm-lock.yaml                               | 14 +++-
 src/plugins/synced-lyrics/renderer/utils.tsx | 75 +++++++++++++-------
 3 files changed, 62 insertions(+), 29 deletions(-)

diff --git a/package.json b/package.json
index 5c1383ae..9bbd3a79 100644
--- a/package.json
+++ b/package.json
@@ -62,6 +62,8 @@
     "neverBuiltDependencies": []
   },
   "dependencies": {
+    "@dehoist/romanize-thai": "1.0.0",
+    "@electron-toolkit/tsconfig": "1.0.1",
     "@electron/remote": "2.1.3",
     "@ffmpeg.wasm/core-mt": "0.12.0",
     "@ffmpeg.wasm/main": "0.12.0",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 0535a11d..8804bf68 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -33,6 +33,12 @@ importers:
 
   .:
     dependencies:
+      '@dehoist/romanize-thai':
+        specifier: 1.0.0
+        version: 1.0.0
+      '@electron-toolkit/tsconfig':
+        specifier: 1.0.1
+        version: 1.0.1(@types/node@24.3.0)
       '@electron/remote':
         specifier: 2.1.3
         version: 2.1.3(electron@38.0.0)
@@ -241,9 +247,6 @@ importers:
         specifier: 4.1.5
         version: 4.1.5
     devDependencies:
-      '@electron-toolkit/tsconfig':
-        specifier: 1.0.1
-        version: 1.0.1(@types/node@24.3.0)
       '@eslint/js':
         specifier: 9.34.0
         version: 9.34.0
@@ -473,6 +476,9 @@ packages:
   '@bufbuild/protobuf@2.6.3':
     resolution: {integrity: sha512-w/gJKME9mYN7ZoUAmSMAWXk4hkVpxRKvEJCb3dV5g9wwWdxTJJ0ayOJAVcNxtdqaxDyFuC0uz4RSGVacJ030PQ==}
 
+  '@dehoist/romanize-thai@1.0.0':
+    resolution: {integrity: sha512-6SqD4vyZ48otnypLXMh901CeQetoP5ptYOaIr58N6zDqjjoN0bHszMb5d/6AXJJQf8kIvbmSWBeuDrbAWLajPQ==}
+
   '@develar/schema-utils@2.6.5':
     resolution: {integrity: sha512-0cp4PsWQ/9avqTVMCtZ+GirikIA36ikvjtHweU4/j8yLtgObI0+JUPhYFScgwlteveGB1rt3Cm8UhN04XayDig==}
     engines: {node: '>= 8.9.0'}
@@ -4909,6 +4915,8 @@ snapshots:
 
   '@bufbuild/protobuf@2.6.3': {}
 
+  '@dehoist/romanize-thai@1.0.0': {}
+
   '@develar/schema-utils@2.6.5':
     dependencies:
       ajv: 6.12.6
diff --git a/src/plugins/synced-lyrics/renderer/utils.tsx b/src/plugins/synced-lyrics/renderer/utils.tsx
index c0f3f8c8..1c6a410b 100644
--- a/src/plugins/synced-lyrics/renderer/utils.tsx
+++ b/src/plugins/synced-lyrics/renderer/utils.tsx
@@ -1,15 +1,11 @@
 import { render } from 'solid-js/web';
-
 import KuromojiAnalyzer from 'kuroshiro-analyzer-kuromoji';
 import Kuroshiro from 'kuroshiro';
-
 import { romanize as esHangulRomanize } from 'es-hangul';
 import hanja from 'hanja';
-
-import pinyin from 'tiny-pinyin';
-
+import * as pinyin from 'tiny-pinyin';
+import { romanize as romanizeThaiFrag } from '@dehoist/romanize-thai';
 import { lazy } from 'lazy-var';
-
 import { detect } from 'tinyld';
 
 import { waitForElement } from '@/utils/wait-for-element';
@@ -155,26 +151,9 @@ const hasKorean = (lines: string[]) =>
 const hasChinese = (lines: string[]) =>
   lines.some((line) => /[\u4E00-\u9FFF]+/.test(line));
 
-export const romanize = async (line: string) => {
-  const lang = detect(line);
-
-  const handlers: Record<string, (line: string) => Promise<string> | string> = {
-    ja: romanizeJapanese,
-    ko: romanizeHangul,
-    zh: romanizeChinese,
-  };
-
-  const NO_OP = (l: string) => l;
-  const handler = handlers[lang] ?? NO_OP;
-
-  line = await handler(line);
-
-  if (hasJapanese([line])) line = await romanizeJapanese(line);
-  if (hasKorean([line])) line = romanizeHangul(line);
-  if (hasChinese([line])) line = romanizeChinese(line);
-
-  return line;
-};
+// https://en.wikipedia.org/wiki/Thai_(Unicode_block)
+const hasThai = (lines: string[]) =>
+  lines.some((line) => /[\u0E00-\u0E7F]+/.test(line));
 
 export const romanizeJapanese = async (line: string) =>
   (await kuroshiro.get()).convert(line, {
@@ -190,3 +169,47 @@ export const romanizeChinese = (line: string) => {
     pinyin.convertToPinyin(match, ' ', true),
   );
 };
+
+const thaiSegmenter = Intl.Segmenter.supportedLocalesOf('th').includes('th')
+  ? new Intl.Segmenter('th', { granularity: 'word' })
+  : null;
+
+export const romanizeThai = (line: string) => {
+  if (!thaiSegmenter) return romanizeThaiFrag(line);
+
+  const segments = Array.from(thaiSegmenter.segment(line));
+  const latin = segments
+    .map((segment) =>
+      segment.isWordLike
+        ? romanizeThaiFrag(segment.segment)
+        : segment.segment.trim(),
+    )
+    .join(' ')
+    .trim();
+
+  return latin;
+};
+
+const handlers: Record<string, (line: string) => Promise<string> | string> = {
+  ja: romanizeJapanese,
+  ko: romanizeHangul,
+  zh: romanizeChinese,
+  th: romanizeThai,
+};
+
+export const romanize = async (line: string) => {
+  const lang = detect(line);
+
+  const handler = handlers[lang];
+  if (handler) {
+    return handler(line);
+  }
+
+  // fallback
+  if (hasJapanese([line])) line = await romanizeJapanese(line);
+  if (hasKorean([line])) line = romanizeHangul(line);
+  if (hasChinese([line])) line = romanizeChinese(line);
+  if (hasThai([line])) line = romanizeThai(line);
+
+  return line;
+};