handle layer popups

src/Compositor.cpp

@@ -310,4 +310,18 @@ bool CCompositor::windowValidMapped(CWindow* pWindow) {
         return false;
 
     return true;
+}
+
+SLayerSurface* CCompositor::getLayerForPopup(SLayerPopup* pPopup) {
+    auto CurrentPopup = pPopup;
+    while (CurrentPopup->parentPopup != nullptr) {
+        for (auto& p : g_pCompositor->m_lLayerPopups) {
+            if (p.popup == CurrentPopup->parentPopup) {
+                CurrentPopup = &p;
+                break;
+            }
+        }
+    }
+    
+    return CurrentPopup->parentSurface;
 }