tdf#136323 qt5: Remember accessible object

'QAccessibleCache::insert' from the Qt library has a
'Q_ASSERT' checking that the corresponding 'QObject' for
which the 'QAccessibleInterface' provides information
is actually the same as the object passed as a parameter:

    QAccessible::Id QAccessibleCache::insert(QObject *object, QAccessibleInterface *iface) const
    {
        // ...
        QObject *obj = iface->object();
->      Q_ASSERT(object == obj);

However, 'Qt5AccessibleWidget::object' so far was always returning
'nullptr', triggering this assert when using a Qt version
not built with 'QT_NO_DEBUG'.

To fix this, remember and return the object as needed.

Change-Id: I4015b4c37aa8a073b02465df580a7235884e6cf3
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/102196
Tested-by: Jenkins
Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>
(cherry picked from commit 4461d49c6cfce22c2c96185b0a1d07bfe9709268)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/102126
Reviewed-by: Caolán McNamara <caolanm@redhat.com>

2 files changed, 8 insertions, 5 deletions

diff --git a/vcl/inc/qt5/Qt5AccessibleWidget.hxx b/vcl/inc/qt5/Qt5AccessibleWidget.hxx
index 6b0d71cba9f5..0f62d2a8a5b8 100644
--- a/vcl/inc/qt5/Qt5AccessibleWidget.hxx
+++ b/vcl/inc/qt5/Qt5AccessibleWidget.hxx
@@ -41,7 +41,8 @@ class VCLPLUG_QT5_PUBLIC Qt5AccessibleWidget : public QObject,
     Q_OBJECT
 
 public:
-    Qt5AccessibleWidget(const css::uno::Reference<css::accessibility::XAccessible> xAccessible);
+    Qt5AccessibleWidget(const css::uno::Reference<css::accessibility::XAccessible> xAccessible,
+                        QObject* pObject);
     QWindow* window() const override;
     int childCount() const override;
     int indexOfChild(const QAccessibleInterface* child) const override;
@@ -137,6 +138,7 @@ public:
 private:
     css::uno::Reference<css::accessibility::XAccessible> m_xAccessible;
     css::uno::Reference<css::accessibility::XAccessibleContext> getAccessibleContextImpl() const;
+    QObject* m_pObject;
 };
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/qt5/Qt5AccessibleWidget.cxx b/vcl/qt5/Qt5AccessibleWidget.cxx
index 6a828865036e..7136e0823790 100644
--- a/vcl/qt5/Qt5AccessibleWidget.cxx
+++ b/vcl/qt5/Qt5AccessibleWidget.cxx
@@ -58,8 +58,9 @@ using namespace css::accessibility;
 using namespace css::beans;
 using namespace css::uno;
 
-Qt5AccessibleWidget::Qt5AccessibleWidget(const Reference<XAccessible> xAccessible)
+Qt5AccessibleWidget::Qt5AccessibleWidget(const Reference<XAccessible> xAccessible, QObject* pObject)
     : m_xAccessible(xAccessible)
+    , m_pObject(pObject)
 {
     Reference<XAccessibleContext> xContext = xAccessible->getAccessibleContext();
     Reference<XAccessibleEventBroadcaster> xBroadcaster(xContext, UNO_QUERY);
@@ -698,7 +699,7 @@ bool Qt5AccessibleWidget::isValid() const
     return xAc.is();
 }
 
-QObject* Qt5AccessibleWidget::object() const { return nullptr; }
+QObject* Qt5AccessibleWidget::object() const { return m_pObject; }
 
 void Qt5AccessibleWidget::setText(QAccessible::Text /* t */, const QString& /* text */) {}
 
@@ -721,13 +722,13 @@ QAccessibleInterface* Qt5AccessibleWidget::customFactory(const QString& classnam
         vcl::Window* pWindow = pWidget->frame().GetWindow();
 
         if (pWindow)
-            return new Qt5AccessibleWidget(pWindow->GetAccessible());
+            return new Qt5AccessibleWidget(pWindow->GetAccessible(), object);
     }
     if (classname == QLatin1String("Qt5XAccessible") && object)
     {
         Qt5XAccessible* pXAccessible = dynamic_cast<Qt5XAccessible*>(object);
         if (pXAccessible && pXAccessible->m_xAccessible.is())
-            return new Qt5AccessibleWidget(pXAccessible->m_xAccessible);
+            return new Qt5AccessibleWidget(pXAccessible->m_xAccessible, object);
     }
 
     return nullptr;