Refactor new editor host orchestration

new_editor/app/Application.h

@@ -6,6 +6,8 @@
 
 #include <Host/AutoScreenshot.h>
 #include <Host/D3D12WindowRenderer.h>
+#include <Host/D3D12WindowRenderLoop.h>
+#include <Host/HostRuntimeState.h>
 #include <Host/InputModifierTracker.h>
 #include <Host/NativeRenderer.h>
 
@@ -23,6 +25,10 @@
 #include <string_view>
 #include <vector>
 
+namespace XCEngine::UI::Editor::Host {
+class WindowMessageDispatcher;
+}
+
 namespace XCEngine::UI::Editor {
 
 class Application {
@@ -32,11 +38,15 @@ public:
     int Run(HINSTANCE hInstance, int nCmdShow);
 
 private:
+    friend class ::XCEngine::UI::Editor::Host::WindowMessageDispatcher;
+
     static LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam);
 
     bool Initialize(HINSTANCE hInstance, int nCmdShow);
     void Shutdown();
     void RenderFrame();
+    void OnDeferredRenderMessage();
+    void OnPaintMessage();
     void OnResize();
     void OnEnterSizeMove();
     void OnExitSizeMove();
@@ -44,7 +54,6 @@ private:
     void QueueWindowResize(UINT width, UINT height);
     void QueueCurrentClientResize();
     bool ApplyPendingWindowResize();
-    void RequestDeferredRenderFrame();
     bool QueryCurrentClientPixelSize(UINT& outWidth, UINT& outHeight) const;
     bool IsPointerInsideClientArea() const;
     bool ApplyCurrentCursor() const;
@@ -78,19 +87,14 @@ private:
     ATOM m_windowClassAtom = 0;
     ::XCEngine::UI::Editor::Host::NativeRenderer m_renderer = {};
     ::XCEngine::UI::Editor::Host::D3D12WindowRenderer m_windowRenderer = {};
+    ::XCEngine::UI::Editor::Host::D3D12WindowRenderLoop m_windowRenderLoop = {};
     ::XCEngine::UI::Editor::Host::AutoScreenshotController m_autoScreenshot = {};
     ::XCEngine::UI::Editor::Host::InputModifierTracker m_inputModifierTracker = {};
     App::ProductEditorContext m_editorContext = {};
     App::ProductEditorWorkspace m_editorWorkspace = {};
     std::vector<::XCEngine::UI::UIInputEvent> m_pendingInputEvents = {};
     bool m_trackingMouseLeave = false;
-    UINT m_windowDpi = 96u;
-    float m_dpiScale = 1.0f;
-    bool m_inInteractiveResize = false;
-    bool m_renderFrameQueued = false;
-    bool m_hasPendingWindowResize = false;
-    UINT m_pendingWindowResizeWidth = 0u;
-    UINT m_pendingWindowResizeHeight = 0u;
+    ::XCEngine::UI::Editor::Host::HostRuntimeState m_hostRuntime = {};
 };
 
 int RunXCUIEditorApp(HINSTANCE hInstance, int nCmdShow);