new_editor: stabilize resize lifecycle groundwork

new_editor/app/Platform/Win32/EditorWindow.h

@@ -5,6 +5,7 @@
 #endif
 
 #include "Platform/Win32/EditorWindowPointerCapture.h"
+#include "Platform/Win32/EditorWindowState.h"
 #include "Platform/Win32/EditorWindowTransferRequests.h"
 
 #include <windows.h>
@@ -88,8 +89,10 @@ public:
     std::string_view GetWindowId() const;
     HWND GetHwnd() const;
     bool HasHwnd() const;
+    EditorWindowLifecycleState GetLifecycleState() const;
     bool IsPrimary() const;
     bool IsClosing() const;
+    bool IsDestroyed() const;
     const std::wstring& GetTitle() const;
     const UIEditorWorkspaceController* TryGetWorkspaceController() const;
     const UIEditorWorkspaceController& GetWorkspaceController() const;
@@ -122,9 +125,10 @@ private:
     void ClearExternalDockHostDropPreview();
 
     void AttachHwnd(HWND hwnd);
+    void MarkInitializing();
+    void MarkRunning();
     void MarkDestroyed();
     void MarkClosing();
-    void ClearClosing();
     void SetPrimary(bool primary);
     void SetTrackingMouseLeave(bool trackingMouseLeave);
     void SetTitle(std::wstring title);
@@ -145,6 +149,10 @@ private:
     EditorWindowFrameTransferRequests OnPaintMessage(
         EditorContext& editorContext,
         bool globalTabDragActive);
+    void QueueCompletedImmediateFrame(
+        EditorWindowFrameTransferRequests transferRequests);
+    bool HasQueuedCompletedImmediateFrame() const;
+    EditorWindowFrameTransferRequests ConsumeQueuedCompletedImmediateFrameTransferRequests();
     bool OnResize(UINT width, UINT height);
     void OnEnterSizeMove();
     bool OnExitSizeMove();
@@ -256,6 +264,8 @@ private:
     std::unique_ptr<EditorWindowFrameOrchestrator> m_frameOrchestrator = {};
     std::unique_ptr<EditorWindowInputController> m_inputController = {};
     std::unique_ptr<EditorWindowRuntimeController> m_runtime = {};
+    EditorWindowFrameTransferRequests m_queuedImmediateFrameTransferRequests = {};
+    bool m_hasQueuedCompletedImmediateFrame = false;
 };
 
 } // namespace XCEngine::UI::Editor::App