IJPL-163439 Synchronize localization settings from the registry at app closing

GitOrigin-RevId: c5d6d60e2081f1b9cc9b55bcdb1990e0b0181680

platform/platform-impl/src/com/intellij/ide/LanguageBundleListener.kt

@@ -3,8 +3,13 @@ package com.intellij.ide
 
 import com.intellij.DynamicBundle
 import com.intellij.l10n.LocalizationStateService
+import com.intellij.l10n.LocalizationUtil
+import com.intellij.openapi.application.PathManager
 import com.intellij.openapi.components.PersistentStateComponent
+import com.intellij.openapi.util.registry.EarlyAccessRegistryManager
 import com.intellij.util.text.DateTimeFormatManager
+import java.nio.file.Files
+import java.nio.file.NoSuchFileException
 
 private class LanguageBundleListener : AppLifecycleListener {
   override fun appStarted() {
@@ -12,7 +17,37 @@ private class LanguageBundleListener : AppLifecycleListener {
       (it as PersistentStateComponent<*>).initializeComponent()
       it.resetLocaleIfNeeded()
     }
+    EarlyAccessRegistryManager.syncAndFlush()
     DynamicBundle.clearCache()
     DateTimeFormatManager.getInstance().resetFormats()
   }
+
+  
+  /**
+   * Reads the early access registry file and updates the registry settings related to localization.
+   * This ensures that any changes made externally (e.g., via Toolbox) to the localization settings are accurately reflected. 
+   * */
+  override fun appClosing() {
+    val earlyAccessRegistryFile = PathManager.getConfigDir().resolve(EarlyAccessRegistryManager.fileName)
+    val lines = try {
+      Files.lines(earlyAccessRegistryFile)
+    }
+    catch (_: NoSuchFileException) {
+      return
+    }
+    lines.use { lineStream ->
+      val iterator = lineStream.iterator()
+      while (iterator.hasNext()) {
+        val key = iterator.next()
+        if (!iterator.hasNext()) {
+          break
+        }
+        val value = iterator.next()
+        if (key == LocalizationUtil.LOCALIZATION_KEY) {
+          EarlyAccessRegistryManager.setString(LocalizationUtil.LOCALIZATION_KEY, value)
+          break
+        }
+      }
+    }
+  }
 }