From ff2df510d76fb495c71ad5fdc555081d5f80ca58 Mon Sep 17 00:00:00 2001
From: ShikiSuen <shikisuen@outlook.com>
Date: Tue, 5 Sep 2023 15:38:47 +0800
Subject: [PATCH] TooltipUI // Auto-close out-of-date window instances.

---
 .../vChewing_TooltipUI/Sources/TooltipUI/TooltipUI.swift   | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Packages/vChewing_TooltipUI/Sources/TooltipUI/TooltipUI.swift b/Packages/vChewing_TooltipUI/Sources/TooltipUI/TooltipUI.swift
index 4d3fac87..374d0325 100644
--- a/Packages/vChewing_TooltipUI/Sources/TooltipUI/TooltipUI.swift
+++ b/Packages/vChewing_TooltipUI/Sources/TooltipUI/TooltipUI.swift
@@ -20,6 +20,12 @@ public class TooltipUI: NSWindowController {
     }
   }
 
+  private static var currentWindow: NSWindow? {
+    willSet {
+      currentWindow?.orderOut(nil)
+    }
+  }
+
   public var direction: NSAttributedTooltipTextView.writingDirection = .horizontal {
     didSet {
       if #unavailable(macOS 10.13) { direction = .horizontal }
@@ -47,6 +53,7 @@ public class TooltipUI: NSWindowController {
     messageText.textColor = NSColor.textColor
     messageText.needsDisplay = true
     panel.contentView?.addSubview(messageText)
+    Self.currentWindow = panel
     super.init(window: panel)
   }