fix: xwindow stack error

Author: zzxyb

examples/tinywl/surfacewrapper.cpp

@@ -154,6 +154,14 @@ void SurfaceWrapper::setParent(QQuickItem *item)
 void SurfaceWrapper::setActivate(bool activate)
 {
     m_shellSurface->setActivate(activate);
+    if (type() == SurfaceWrapper::Type::XWayland) {
+        auto xwaylandSurface = qobject_cast<WXWaylandSurface *>(m_shellSurface);
+        if (activate)
+            xwaylandSurface->restack(nullptr, WXWaylandSurface::XCB_STACK_MODE_ABOVE);
+
+        return;
+    }
+
     auto parent = parentSurface();
     while (parent) {
         parent->setActivate(activate);

src/server/protocols/wxwaylandsurface.cpp

@@ -565,7 +565,12 @@ void WXWaylandSurface::close()
 
 void WXWaylandSurface::restack(WXWaylandSurface *sibling, StackMode mode)
 {
-    handle()->restack(*sibling->handle(), static_cast<xcb_stack_mode_t>(mode));
+    if (sibling) {
+        handle()->restack(*sibling->handle(), static_cast<xcb_stack_mode_t>(mode));
+        return;
+    }
+
+    handle()->restack(nullptr, static_cast<xcb_stack_mode_t>(mode));
 }
 
 WAYLIB_SERVER_END_NAMESPACE