guard setDesiredSize with a bool

src/qwaylandlayersurface.cpp

@@ -62,7 +62,9 @@ QWaylandLayerSurface::QWaylandLayerSurface(QWaylandLayerShellIntegration *shell,
     });
 
     connect(m_interface, &Window::desiredSizeChanged, this, [this]() {
-        setDesiredSize(m_interface->desiredSize());
+        if (!m_settingDesiredSize) {
+            setDesiredSize(m_interface->desiredSize());
+        }
     });
 
     setKeyboardInteractivity(m_interface->keyboardInteractivity());
@@ -125,6 +127,12 @@ void QWaylandLayerSurface::applyConfigure()
 
 void QWaylandLayerSurface::setDesiredSize(const QSize &size)
 {
+    // This guards setDesiredSize to avoid the connection between
+    // m_interface::desiredSizeChanged and this takes effect when
+    // we call m_interface->setDesiredSize from here
+    m_settingDesiredSize = true;
+    m_interface->setDesiredSize(size);
+
     const bool horizontallyConstrained = m_interface->anchors().testFlags({Window::AnchorLeft, Window::AnchorRight});
     const bool verticallyConstrained = m_interface->anchors().testFlags({Window::AnchorTop, Window::AnchorBottom});
 
@@ -136,6 +144,7 @@ void QWaylandLayerSurface::setDesiredSize(const QSize &size)
         effectiveSize.setHeight(0);
     }
     set_size(effectiveSize.width(), effectiveSize.height());
+    m_settingDesiredSize = false;
 }
 
 void QWaylandLayerSurface::setAnchor(uint anchor)

src/qwaylandlayersurface_p.h

@@ -64,6 +64,7 @@ private:
     QSize m_pendingSize;
     QString m_activationToken;
 
+    bool m_settingDesiredSize = false;
     bool m_configured = false;
 #if QT_VERSION < QT_VERSION_CHECK(6, 9, 0)
     bool m_configuring = false;