tdf#94715 - ensure we remove ourselves from the same event source.

Seemingly event removal was not occuring; also clean up historic
duplication of UNO and C++ references using rtl::Reference.

Change-Id: I56dfb76501929886f70495804670f8c4f70e796b
Reviewed-on: https://gerrit.libreoffice.org/21088
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Michael Meeks <michael.meeks@collabora.com>

2 files changed, 43 insertions, 39 deletions

diff --git a/include/toolkit/awt/vclxaccessiblecomponent.hxx b/include/toolkit/awt/vclxaccessiblecomponent.hxx
index b1fda894b29f..7025540894ba 100644
--- a/include/toolkit/awt/vclxaccessiblecomponent.hxx
+++ b/include/toolkit/awt/vclxaccessiblecomponent.hxx
@@ -63,15 +63,16 @@ class TOOLKIT_DLLPUBLIC VCLXAccessibleComponent
         ,public VCLXAccessibleComponent_BASE
 {
 private:
-    css::uno::Reference< css::awt::XWindow> mxWindow;
-    VCLXWindow*                         mpVCLXindow;
+    rtl::Reference<VCLXWindow>      m_xVCLXWindow;
+    VclPtr<vcl::Window>             m_xEventSource;
 
     VCLExternalSolarLock*           m_pSolarLock;
 
-protected:
-     DECL_LINK_TYPED( WindowEventListener, VclWindowEvent&, void );
-     DECL_LINK_TYPED( WindowChildEventListener, VclWindowEvent&, void );
+    DECL_LINK_TYPED( WindowEventListener, VclWindowEvent&, void );
+    DECL_LINK_TYPED( WindowChildEventListener, VclWindowEvent&, void );
+    void            DisconnectEvents();
 
+protected:
     virtual void    ProcessWindowEvent( const VclWindowEvent& rVclWindowEvent );
     virtual void    ProcessWindowChildEvent( const VclWindowEvent& rVclWindowEvent );
     virtual void    FillAccessibleRelationSet( utl::AccessibleRelationSetHelper& rRelationSet );
@@ -80,10 +81,10 @@ protected:
     virtual css::uno::Reference< css::accessibility::XAccessible > GetChildAccessible( const VclWindowEvent& rVclWindowEvent );
 
 public:
-    VCLXAccessibleComponent( VCLXWindow* pVCLXindow );
+    VCLXAccessibleComponent( VCLXWindow* pVCLXWindow );
     virtual ~VCLXAccessibleComponent();
 
-    VCLXWindow*    GetVCLXWindow() const { return mpVCLXindow; }
+    VCLXWindow*    GetVCLXWindow() const;
     VclPtr<vcl::Window> GetWindow() const;
     template< class derived_type > VclPtr< derived_type > GetAs() const {
         return VclPtr< derived_type >( static_cast< derived_type * >( GetWindow().get() ) ); }
diff --git a/toolkit/source/awt/vclxaccessiblecomponent.cxx b/toolkit/source/awt/vclxaccessiblecomponent.cxx
index a037109f1f2f..bc9c5fa7713d 100644
--- a/toolkit/source/awt/vclxaccessiblecomponent.cxx
+++ b/toolkit/source/awt/vclxaccessiblecomponent.cxx
@@ -42,35 +42,45 @@
 using namespace ::com::sun::star;
 using namespace ::comphelper;
 
-VCLXAccessibleComponent::VCLXAccessibleComponent( VCLXWindow* pVCLXindow )
+VCLXAccessibleComponent::VCLXAccessibleComponent( VCLXWindow* pVCLXWindow )
     : AccessibleExtendedComponentHelper_BASE( new VCLExternalSolarLock() )
     , OAccessibleImplementationAccess( )
 {
-    mpVCLXindow = pVCLXindow;
-    mxWindow = pVCLXindow;
+    m_xVCLXWindow = pVCLXWindow;
 
     m_pSolarLock = static_cast< VCLExternalSolarLock* >( getExternalLock( ) );
 
-    DBG_ASSERT( pVCLXindow->GetWindow(), "VCLXAccessibleComponent - no window!" );
-    if ( pVCLXindow->GetWindow() )
+    DBG_ASSERT( pVCLXWindow->GetWindow(), "VCLXAccessibleComponent - no window!" );
+    m_xEventSource = pVCLXWindow->GetWindow();
+    if ( m_xEventSource )
     {
-      pVCLXindow->GetWindow()->AddEventListener( LINK( this, VCLXAccessibleComponent, WindowEventListener ) );
-      pVCLXindow->GetWindow()->AddChildEventListener( LINK( this, VCLXAccessibleComponent, WindowChildEventListener ) );
+        m_xEventSource->AddEventListener( LINK( this, VCLXAccessibleComponent, WindowEventListener ) );
+        m_xEventSource->AddChildEventListener( LINK( this, VCLXAccessibleComponent, WindowChildEventListener ) );
     }
 
     // announce the XAccessible of our creator to the base class
-    lateInit( pVCLXindow );
+    lateInit( pVCLXWindow );
 }
 
-VCLXAccessibleComponent::~VCLXAccessibleComponent()
+VCLXWindow* VCLXAccessibleComponent::GetVCLXWindow() const
 {
-    ensureDisposed();
+    return m_xVCLXWindow.get();
+}
 
-    if ( mpVCLXindow && mpVCLXindow->GetWindow() )
+void VCLXAccessibleComponent::DisconnectEvents()
+{
+    if ( m_xEventSource )
     {
-        mpVCLXindow->GetWindow()->RemoveEventListener( LINK( this, VCLXAccessibleComponent, WindowEventListener ) );
-        mpVCLXindow->GetWindow()->RemoveChildEventListener( LINK( this, VCLXAccessibleComponent, WindowChildEventListener ) );
+        m_xEventSource->RemoveEventListener( LINK( this, VCLXAccessibleComponent, WindowEventListener ) );
+        m_xEventSource->RemoveChildEventListener( LINK( this, VCLXAccessibleComponent, WindowChildEventListener ) );
+        m_xEventSource.clear();
     }
+}
+
+VCLXAccessibleComponent::~VCLXAccessibleComponent()
+{
+    ensureDisposed();
+    DisconnectEvents();
 
     delete m_pSolarLock;
     m_pSolarLock = nullptr;
@@ -103,11 +113,11 @@ uno::Sequence< OUString > VCLXAccessibleComponent::getSupportedServiceNames() th
 
 IMPL_LINK_TYPED( VCLXAccessibleComponent, WindowEventListener, VclWindowEvent&, rEvent, void )
 {
-        /* Ignore VCLEVENT_WINDOW_ENDPOPUPMODE, because the UNO accessibility wrapper
-         * might have been destroyed by the previous VCLEventListener (if no AT tool
-         * is running), e.g. sub-toolbars in impress.
-         */
-    if ( mxWindow.is() /* #122218# */ && (rEvent.GetId() != VCLEVENT_WINDOW_ENDPOPUPMODE) )
+    /* Ignore VCLEVENT_WINDOW_ENDPOPUPMODE, because the UNO accessibility wrapper
+     * might have been destroyed by the previous VCLEventListener (if no AT tool
+     * is running), e.g. sub-toolbars in impress.
+     */
+    if ( m_xVCLXWindow.is() /* #122218# */ && (rEvent.GetId() != VCLEVENT_WINDOW_ENDPOPUPMODE) )
     {
         DBG_ASSERT( rEvent.GetWindow(), "Window???" );
         if( !rEvent.GetWindow()->IsAccessibilityEventsSuppressed() || ( rEvent.GetId() == VCLEVENT_OBJECT_DYING ) )
@@ -119,7 +129,7 @@ IMPL_LINK_TYPED( VCLXAccessibleComponent, WindowEventListener, VclWindowEvent&,
 
 IMPL_LINK_TYPED( VCLXAccessibleComponent, WindowChildEventListener, VclWindowEvent&, rEvent, void )
 {
-    if ( mxWindow.is() /* #i68079# */ )
+    if ( m_xVCLXWindow.is() /* #i68079# */ )
     {
         DBG_ASSERT( rEvent.GetWindow(), "Window???" );
         if( !rEvent.GetWindow()->IsAccessibilityEventsSuppressed() )
@@ -186,10 +196,8 @@ void VCLXAccessibleComponent::ProcessWindowEvent( const VclWindowEvent& rVclWind
     {
         case VCLEVENT_OBJECT_DYING:
         {
-            pAccWindow->RemoveEventListener( LINK( this, VCLXAccessibleComponent, WindowEventListener ) );
-            pAccWindow->RemoveChildEventListener( LINK( this, VCLXAccessibleComponent, WindowChildEventListener ) );
-            mxWindow.clear();
-            mpVCLXindow = nullptr;
+            DisconnectEvents();
+            m_xVCLXWindow.clear();
         }
         break;
         case VCLEVENT_WINDOW_CHILDDESTROYED:
@@ -338,16 +346,11 @@ void VCLXAccessibleComponent::ProcessWindowEvent( const VclWindowEvent& rVclWind
 
 void VCLXAccessibleComponent::disposing()
 {
-    if ( mpVCLXindow && mpVCLXindow->GetWindow() )
-    {
-        mpVCLXindow->GetWindow()->RemoveEventListener( LINK( this, VCLXAccessibleComponent, WindowEventListener ) );
-        mpVCLXindow->GetWindow()->RemoveChildEventListener( LINK( this, VCLXAccessibleComponent, WindowChildEventListener ) );
-    }
+    DisconnectEvents();
 
     AccessibleExtendedComponentHelper_BASE::disposing();
 
-    mxWindow.clear();
-    mpVCLXindow = nullptr;
+    m_xVCLXWindow.clear();
 }
 
 VclPtr<vcl::Window> VCLXAccessibleComponent::GetWindow() const
@@ -761,8 +764,8 @@ void VCLXAccessibleComponent::grabFocus(  ) throw (uno::RuntimeException, std::e
     OExternalLockGuard aGuard( this );
 
     uno::Reference< accessibility::XAccessibleStateSet > xStates = getAccessibleStateSet();
-    if ( mxWindow.is() && xStates.is() && xStates->contains( accessibility::AccessibleStateType::FOCUSABLE ) )
-        mxWindow->setFocus();
+    if ( m_xVCLXWindow.is() && xStates.is() && xStates->contains( accessibility::AccessibleStateType::FOCUSABLE ) )
+        m_xVCLXWindow->setFocus();
 }
 
 sal_Int32 SAL_CALL VCLXAccessibleComponent::getForeground(  ) throw (uno::RuntimeException, std::exception)