Add an X11 connection to the drag-and-drop proxy

src/wine-host/xdnd-proxy.cpp

@@ -134,7 +134,8 @@ void CALLBACK dnd_winevent_callback(HWINEVENTHOOK /*hWinEventHook*/,
 }
 
 WineXdndProxy::WineXdndProxy()
-    : hook_handle(
+    : x11_connection(xcb_connect(nullptr, nullptr), xcb_disconnect),
+      hook_handle(
           SetWinEventHook(EVENT_OBJECT_CREATE,
                           EVENT_OBJECT_CREATE,
                           nullptr,

src/wine-host/xdnd-proxy.h

@@ -18,6 +18,12 @@
 
 #include <memory>
 
+// Use the native version of xcb
+#pragma push_macro("_WIN32")
+#undef _WIN32
+#include <xcb/xcb.h>
+#pragma pop_macro("_WIN32")
+
 #include <windows.h>
 
 /**
@@ -45,6 +51,8 @@ class WineXdndProxy {
     static WineXdndProxy& init_proxy();
 
    private:
+    std::unique_ptr<xcb_connection_t, decltype(&xcb_disconnect)> x11_connection;
+
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wignored-attributes"
     std::unique_ptr<std::remove_pointer_t<HWINEVENTHOOK>,