PhraseEditor // Release some memory when it gets disappeared.

Packages/vChewing_PhraseEditorUI/Sources/PhraseEditorUI/PhraseEditorUI.swift

@@ -297,6 +297,8 @@ public struct VwrPhraseEditorUI: View {
       selInputMode = .imeModeNULL
       selUserDataType = .thePhrases
       txtContent = NSLocalizedString("Please select Simplified / Traditional Chinese mode above.", comment: "")
+      isLoading = true
+      Self.txtContentStorage = ""
     }.onAppear {
       guard let delegate = delegate else { return }
       selInputMode = delegate.currentInputMode

Source/Modules/WindowControllers/CtlPrefWindow.swift

@@ -28,7 +28,7 @@ extension NSToolbarItem.Identifier {
 // only works with macOS System Preference pane (like macOS built-in input methods).
 // It should be set as "Preferences" which correspondes to the "Preference" pref pane
 // of this build target.
-class CtlPrefWindow: NSWindowController {
+class CtlPrefWindow: NSWindowController, NSWindowDelegate {
   @IBOutlet var fontSizePopUpButton: NSPopUpButton!
   @IBOutlet var uiLanguageButton: NSPopUpButton!
   @IBOutlet var basicKeyboardLayoutButton: NSPopUpButton!
@@ -66,8 +66,9 @@ class CtlPrefWindow: NSWindowController {
   public static var shared: CtlPrefWindow?
 
   static func show() {
-    if shared == nil { shared = CtlPrefWindow(windowNibName: "frmPrefWindow") }
+    shared = CtlPrefWindow(windowNibName: "frmPrefWindow")
     guard let sharedWindow = shared?.window else { return }
+    sharedWindow.delegate = shared
     sharedWindow.center()
     sharedWindow.orderFrontRegardless()  // 逼著視窗往最前方顯示
     sharedWindow.level = .statusBar
@@ -174,6 +175,10 @@ class CtlPrefWindow: NSWindowController {
     initPhraseEditor()
   }
 
+  func windowWillClose(_: Notification) {
+    tfdPETextEditor.string = ""
+  }
+
   // 這裡有必要加上這段處理，用來確保藉由偏好設定介面動過的 CNS 開關能夠立刻生效。
   // 所有涉及到語言模型開關的內容均需要這樣處理。
   @IBAction func toggleCNSSupport(_: Any) {