Check surface exists when setting textinput focus

QWaylandWindow resets the surface on various events.
Handling focus comes in a posted event, so this can be after we've
hidden a window and lost a surface.

Task-number: QTBUG-61704
Change-Id: I535ff78c6bc2b86816696a08f8eebc47186d1225
Reviewed-by: Johan Helsing <johan.helsing@qt.io>

1 files changed, 4 insertions, 2 deletions

diff --git a/src/client/qwaylandinputcontext.cpp b/src/client/qwaylandinputcontext.cpp
index dcc4ad5c7..fac5fb840 100644
--- a/src/client/qwaylandinputcontext.cpp
+++ b/src/client/qwaylandinputcontext.cpp
@@ -541,8 +541,10 @@ void QWaylandInputContext::setFocusObject(QObject *)
     if (window && window->handle() && inputMethodAccepted()) {
         if (mCurrentWindow.data() != window) {
             struct ::wl_surface *surface = static_cast<QWaylandWindow *>(window->handle())->object();
-            textInput()->enable(surface);
-            mCurrentWindow = window;
+            if (surface) {
+                textInput()->enable(surface);
+                mCurrentWindow = window;
+            }
         }
         textInput()->updateState(Qt::ImQueryAll, QtWayland::zwp_text_input_v2::update_state_enter);
     }