Fix reopening closed editor windows

src/wine-host/editor.h

@@ -17,6 +17,21 @@
 #include <optional>
 #include <string>
 
+/**
+ * A basic RAII wrapper around the Win32 window class system, for use in the
+ * Editor class below.
+ */
+class WindowClass {
+   public:
+    WindowClass(std::string name);
+    ~WindowClass();
+
+    /**
+     * The Win32 window class registered for the windows window.
+     */
+    const ATOM atom;
+};
+
 /**
  * A wrapper around the win32 windowing API to create and destroy editor
  * windows. We can embed this window into the window provided by the host, and a
@@ -74,7 +89,7 @@ class Editor {
     /**
      * The Win32 window class registered for the windows window.
      */
-    ATOM window_class;
+    WindowClass window_class;
 
    public:
     /**