fix: disable xembed tray selection manager registeration

The current FdoSelectionManager is for preparing the legacy xembed2sni
solution. We currently no longer plans to go with such solution, but
the current code will register `_NET_SYSTEM_TRAY_S0`. This patch
disabled related code path so it won't gets registered. We should
do registeration from dde-daemon instead.

注:此patch并不直接解决下面关联的PMS问题单,只是有相关性,是相关工作的
一部分.

PMS: BUG-360349
Log:

Author: BLumia

plugins/application-tray/xembedprotocolhandler.cpp

@@ -5,7 +5,10 @@
 #include "abstracttrayprotocol.h"
 #include "traymanager1interface.h"
 #include "xembedprotocolhandler.h"
+
+#if _DDE_TRAY_LOADER_HANDLE_XEMBED_SELECTION_MANAGER
 #include "fdoselectionmanager.h"
+#endif // _DDE_TRAY_LOADER_HANDLE_XEMBED_SELECTION_MANAGER
 
 #include "util.h"
 #include "plugin.h"
@@ -41,10 +44,12 @@ XembedProtocol::XembedProtocol(QObject *parent)
 
     QMetaObject::invokeMethod(this, &XembedProtocol::onTrayIconsChanged, Qt::QueuedConnection);
 
+#if _DDE_TRAY_LOADER_HANDLE_XEMBED_SELECTION_MANAGER
     if ((qgetenv("XDG_SESSION_TYPE") == "wayland") && UTIL->isXAvaliable()) {
         qWarning() << "Not running on X11, registering FDO selection manager";
         m_selectionManager = new FdoSelectionManager(this);
     }
+#endif // _DDE_TRAY_LOADER_HANDLE_XEMBED_SELECTION_MANAGER
 
     QTimer::singleShot(0, this, [this](){
         m_trayManager->Manage();

plugins/application-tray/xembedprotocolhandler.h

@@ -16,6 +16,12 @@
 #include <xcb/composite.h>
 #include <xcb/xcb_image.h>
 
+// dde-daemon handles tray selection-manager registeration so we don't (and shouldn't) need this.
+// Also, if we need to register the FDO selection manager, we also need to ensure tray context menu
+// position can be handled correctly. The whole FdoSelectionManager stuff might be worth to move to
+// dde-shell instead.
+#define _DDE_TRAY_LOADER_HANDLE_XEMBED_SELECTION_MANAGER 0
+
 class FdoSelectionManager;
 namespace tray {
 class XembedProtocol : public AbstractTrayProtocol, public QAbstractNativeEventFilter