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

new_editor/app/Platform/Win32/WindowMessageDispatcherChrome.cpp

@@ -0,0 +1,75 @@
+#include "WindowMessageDispatchHandlers.h"
+
+#include "Platform/Win32/EditorWindow.h"
+#include "WindowMessageHost.h"
+
+namespace XCEngine::UI::Editor::Host {
+
+namespace {
+
+constexpr UINT kMessageNcUaDrawCaption = 0x00AEu;
+constexpr UINT kMessageNcUaDrawFrame = 0x00AFu;
+
+} // namespace
+
+bool TryDispatchWindowChromeMessage(
+    const WindowMessageDispatchContext& context,
+    UINT message,
+    WPARAM wParam,
+    LPARAM lParam,
+    LRESULT& outResult) {
+    switch (message) {
+    case WM_GETMINMAXINFO:
+        if (context.window.IsBorderlessWindowEnabled() &&
+            context.window.HandleBorderlessWindowGetMinMaxInfo(lParam)) {
+            outResult = 0;
+            return true;
+        }
+        return false;
+    case WM_NCCALCSIZE:
+        if (context.window.IsBorderlessWindowEnabled()) {
+            outResult = context.window.HandleBorderlessWindowNcCalcSize(wParam, lParam);
+            return true;
+        }
+        return false;
+    case WM_NCACTIVATE:
+        if (context.window.IsBorderlessWindowEnabled()) {
+            outResult = TRUE;
+            return true;
+        }
+        return false;
+    case WM_NCHITTEST:
+        if (context.window.IsBorderlessWindowEnabled()) {
+            outResult = HTCLIENT;
+            return true;
+        }
+        return false;
+    case WM_NCPAINT:
+    case kMessageNcUaDrawCaption:
+    case kMessageNcUaDrawFrame:
+        if (context.window.IsBorderlessWindowEnabled()) {
+            outResult = 0;
+            return true;
+        }
+        return false;
+    case WM_SYSCOMMAND:
+        if (context.window.HandleBorderlessWindowSystemCommand(
+                context.windowHost.GetEditorContext(),
+                context.windowHost.IsGlobalTabDragActive(),
+                wParam)) {
+            outResult = 0;
+            return true;
+        }
+        return false;
+    case WM_SETCURSOR:
+        if (LOWORD(lParam) == HTCLIENT && context.window.ApplyCurrentCursor()) {
+            outResult = TRUE;
+            return true;
+        }
+        return false;
+    default:
+        return false;
+    }
+}
+
+} // namespace XCEngine::UI::Editor::Host