refactor(new_editor/app): reorganize host structure and add smoke test

new_editor/app/Platform/Win32/WindowMessageDispatcherLifecycle.cpp

@@ -0,0 +1,77 @@
+#include "WindowMessageDispatchHandlers.h"
+
+#include "Platform/Win32/EditorWindow.h"
+#include "WindowMessageHost.h"
+
+namespace XCEngine::UI::Editor::Host {
+
+void RenderAndValidateWindow(const WindowMessageDispatchContext& context) {
+    if (!context.window.IsRenderReady()) {
+        return;
+    }
+
+    context.window.RenderFrame(
+        context.windowHost.GetEditorContext(),
+        context.windowHost.IsGlobalTabDragActive());
+    if (context.hwnd != nullptr && IsWindow(context.hwnd)) {
+        ValidateRect(context.hwnd, nullptr);
+    }
+}
+
+bool TryDispatchWindowLifecycleMessage(
+    const WindowMessageDispatchContext& context,
+    UINT message,
+    WPARAM wParam,
+    LPARAM lParam,
+    LRESULT& outResult) {
+    switch (message) {
+    case WM_DPICHANGED:
+        if (lParam == 0) {
+            return false;
+        }
+        context.window.OnDpiChanged(
+            static_cast<UINT>(LOWORD(wParam)),
+            *reinterpret_cast<const RECT*>(lParam));
+        RenderAndValidateWindow(context);
+        outResult = 0;
+        return true;
+    case WM_ENTERSIZEMOVE:
+        context.window.OnEnterSizeMove();
+        outResult = 0;
+        return true;
+    case WM_EXITSIZEMOVE:
+        context.window.OnExitSizeMove();
+        RenderAndValidateWindow(context);
+        outResult = 0;
+        return true;
+    case WM_SIZE:
+        if (wParam != SIZE_MINIMIZED) {
+            context.window.OnResize(
+                static_cast<UINT>(LOWORD(lParam)),
+                static_cast<UINT>(HIWORD(lParam)));
+            RenderAndValidateWindow(context);
+        }
+        outResult = 0;
+        return true;
+    case WM_PAINT:
+        context.window.OnPaintMessage(
+            context.windowHost.GetEditorContext(),
+            context.windowHost.IsGlobalTabDragActive());
+        outResult = 0;
+        return true;
+    case WM_ERASEBKGND:
+        outResult = 1;
+        return true;
+    case WM_DESTROY:
+        if (context.windowHost.OwnsActiveGlobalTabDrag(context.window.GetWindowId())) {
+            context.windowHost.EndGlobalTabDragSession();
+        }
+        context.windowHost.HandleDestroyedWindow(context.hwnd);
+        outResult = 0;
+        return true;
+    default:
+        return false;
+    }
+}
+
+} // namespace XCEngine::UI::Editor::Host