From 7c97841d07d4a596508f663c887d1f67d105faf6 Mon Sep 17 00:00:00 2001
From: Ariver <shanghai3168@gmail.com>
Date: Wed, 20 May 2026 13:07:20 +0800
Subject: [PATCH] perf: reduce launcher scroll and search jank

---
 Apptag/L10n.swift |   72 +++++++++++++++++++++++++++++++++--
 1 files changed, 67 insertions(+), 5 deletions(-)

diff --git a/Apptag/L10n.swift b/Apptag/L10n.swift
index 9d6ac8b..0a72b7c 100644
--- a/Apptag/L10n.swift
+++ b/Apptag/L10n.swift
@@ -2,6 +2,10 @@
 
 // MARK: - Localization Manager
 
+extension Notification.Name {
+    static let appLanguageDidChange = Notification.Name("AppLanguageDidChange")
+}
+
 enum L10n {
     static var current: [String: String] = [:]
     private(set) static var currentCode = "en"
@@ -14,19 +18,58 @@
 
     static let supported: [(code: String, name: String)] = [
         ("en", "English"),
-        ("zh-Hans", "简体中文"),
-        ("zh-Hant", "繁體中文"),
-        ("ja", "日本語"),
-        ("ko", "한국어"),
-        ("ru", "Русский"),
         ("fr", "Français"),
         ("it", "Italiano"),
+        ("de", "Deutsch"),
         ("es", "Español"),
+        ("pt-BR", "Português (Brasil)"),
+        ("zh-Hans", "简体中文"),
+        ("zh-Hant", "繁體中文"),
+        ("ko", "한국어"),
+        ("ja", "日本語"),
+        ("ru", "Русский"),
+        ("sr-Cyrl", "Српски (ћирилица)"),
+        ("uk", "Українська"),
+        ("th", "ไทย"),
+        ("vi", "Tiếng Việt"),
+        ("ar", "العربية"),
+        ("ar-Najdi", "العربية (نجدي)"),
+        ("tr", "Türkçe"),
+        ("id", "Bahasa Indonesia"),
+        ("cs", "Čeština"),
+        ("da", "Dansk"),
+        ("nl", "Nederlands"),
+        ("no", "Norsk"),
+        ("nn", "Norsk nynorsk"),
+        ("nb", "Norsk bokmål"),
+        ("ms", "Bahasa Melayu"),
+        ("pl", "Polski"),
+        ("ro", "Română"),
+        ("sv", "Svenska"),
     ]
 
     static func switchTo(_ code: String) {
+        guard supported.contains(where: { $0.code == code }) else { return }
+        guard code != currentCode else { return }
         load(code)
+        let relocalizedTags = TagDatabase.relocalizeSystemTagsForCurrentLanguage()
         UserDefaults.standard.set(code, forKey: "appLanguage")
+        NotificationCenter.default.post(name: .appLanguageDidChange, object: nil, userInfo: ["code": currentCode])
+        if relocalizedTags {
+            NotificationCenter.default.post(name: .tagLauncherDataDidChange, object: nil)
+        }
+    }
+
+    /// Load a specific key's translation for a given language code without switching.
+    static func loadedTranslation(_ key: String, for code: String) -> String? {
+        guard let url = Bundle.main.url(
+            forResource: code, withExtension: "json",
+            subdirectory: "Localization"
+        ) else { return nil }
+        guard let data = try? Data(contentsOf: url),
+              let dict = try? JSONSerialization.jsonObject(with: data) as? [String: String]
+        else { return nil }
+        return dict[key]
     }
 
     private static func load(_ code: String) {
@@ -48,12 +91,31 @@
         let lang = Locale.preferredLanguages.first ?? "en"
         if lang.hasPrefix("zh-Hant") || lang.hasPrefix("zh-HK") || lang.hasPrefix("zh-TW") { return "zh-Hant" }
         if lang.hasPrefix("zh") { return "zh-Hans" }
+        if lang.hasPrefix("pt-BR") || lang.hasPrefix("pt_BR") || lang.hasPrefix("pt") { return "pt-BR" }
+        if lang.hasPrefix("sr-Cyrl") || lang.hasPrefix("sr_Cyrl") || lang.hasPrefix("sr") { return "sr-Cyrl" }
+        if lang.hasPrefix("ar") { return "ar" }
+        if lang.hasPrefix("de") { return "de" }
         if lang.hasPrefix("ja") { return "ja" }
         if lang.hasPrefix("ko") { return "ko" }
         if lang.hasPrefix("ru") { return "ru" }
+        if lang.hasPrefix("uk") { return "uk" }
         if lang.hasPrefix("fr") { return "fr" }
         if lang.hasPrefix("it") { return "it" }
         if lang.hasPrefix("es") { return "es" }
+        if lang.hasPrefix("th") { return "th" }
+        if lang.hasPrefix("vi") { return "vi" }
+        if lang.hasPrefix("tr") { return "tr" }
+        if lang.hasPrefix("id") { return "id" }
+        if lang.hasPrefix("cs") { return "cs" }
+        if lang.hasPrefix("da") { return "da" }
+        if lang.hasPrefix("nl") { return "nl" }
+        if lang.hasPrefix("nn") { return "nn" }
+        if lang.hasPrefix("nb") { return "nb" }
+        if lang.hasPrefix("no") { return "no" }
+        if lang.hasPrefix("ms") { return "ms" }
+        if lang.hasPrefix("pl") { return "pl" }
+        if lang.hasPrefix("ro") { return "ro" }
+        if lang.hasPrefix("sv") { return "sv" }
         return "en"
     }
 }

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