accessibility : remove useless guards and simplify.

Change-Id: I9e0d5967f71b2bd822c64690f8e02a0c95c8b88f
Reviewed-on: https://gerrit.libreoffice.org/52581
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
Tested-by: Noel Grandin <noel.grandin@collabora.co.uk>

14 files changed, 112 insertions, 78 deletions

diff --git a/accessibility/inc/standard/vclxaccessiblecheckbox.hxx b/accessibility/inc/standard/vclxaccessiblecheckbox.hxx
index e57ef74eb503..5c4e21e18898 100644
--- a/accessibility/inc/standard/vclxaccessiblecheckbox.hxx
+++ b/accessibility/inc/standard/vclxaccessiblecheckbox.hxx
@@ -44,6 +44,8 @@ private:
 
     virtual ~VCLXAccessibleCheckBox() override = default;
 
+    sal_Int32 implGetMaximumValue();
+
     bool    IsChecked();
     bool    IsIndeterminate();
 
diff --git a/accessibility/inc/standard/vclxaccessibleedit.hxx b/accessibility/inc/standard/vclxaccessibleedit.hxx
index f41479c0ceef..a6207c202c42 100644
--- a/accessibility/inc/standard/vclxaccessibleedit.hxx
+++ b/accessibility/inc/standard/vclxaccessibleedit.hxx
@@ -46,6 +46,7 @@ private:
 
     virtual void                ProcessWindowEvent( const VclWindowEvent& rVclWindowEvent ) override;
     virtual void                FillAccessibleStateSet( utl::AccessibleStateSetHelper& rStateSet ) override;
+    sal_Int16                   implGetAccessibleRole();
 
     // OCommonAccessibleText
     virtual OUString            implGetText() override;
diff --git a/accessibility/inc/standard/vclxaccessiblelist.hxx b/accessibility/inc/standard/vclxaccessiblelist.hxx
index f4301ee13950..71c4b0ff4892 100644
--- a/accessibility/inc/standard/vclxaccessiblelist.hxx
+++ b/accessibility/inc/standard/vclxaccessiblelist.hxx
@@ -92,7 +92,7 @@ public:
         getAccessibleContext() override;
 
     // XAccessibleContext
-    virtual sal_Int32 SAL_CALL getAccessibleChildCount() override;
+    virtual sal_Int32 SAL_CALL getAccessibleChildCount() override final;
     css::uno::Reference< css::accessibility::XAccessible> SAL_CALL
         getAccessibleChild (sal_Int32 i) override;
     virtual css::uno::Reference< css::accessibility::XAccessible > SAL_CALL
@@ -144,6 +144,8 @@ private:
 
     virtual ~VCLXAccessibleList() override = default;
 
+    sal_Int32 implGetAccessibleChildCount();
+
     /** This function is called from the implementation helper during a
         XComponent::dispose call.  Free the list of items and the items themselves.
     */
diff --git a/accessibility/inc/standard/vclxaccessibletabcontrol.hxx b/accessibility/inc/standard/vclxaccessibletabcontrol.hxx
index 9e0960d67ea7..8f248466bce9 100644
--- a/accessibility/inc/standard/vclxaccessibletabcontrol.hxx
+++ b/accessibility/inc/standard/vclxaccessibletabcontrol.hxx
@@ -44,6 +44,10 @@ private:
     AccessibleChildren      m_aAccessibleChildren;
     VclPtr<TabControl>      m_pTabControl;
 
+    css::uno::Reference< css::accessibility::XAccessible > implGetAccessibleChild( sal_Int32 i );
+    bool implIsAccessibleChildSelected( sal_Int32 nChildIndex );
+
+
     void                    UpdateFocused();
     void                    UpdateSelected( sal_Int32 i, bool bSelected );
     void                    UpdatePageText( sal_Int32 i );
diff --git a/accessibility/inc/standard/vclxaccessibletabpage.hxx b/accessibility/inc/standard/vclxaccessibletabpage.hxx
index 495f4a36412a..9d64e665827a 100644
--- a/accessibility/inc/standard/vclxaccessibletabpage.hxx
+++ b/accessibility/inc/standard/vclxaccessibletabpage.hxx
@@ -55,6 +55,8 @@ private:
     bool                    m_bSelected;
     OUString                m_sPageText;
 
+    sal_Int32               implGetAccessibleChildCount();
+
     bool                    IsFocused();
     bool                    IsSelected();
 
diff --git a/accessibility/inc/standard/vclxaccessibletoolbox.hxx b/accessibility/inc/standard/vclxaccessibletoolbox.hxx
index add703137fb2..192445291065 100644
--- a/accessibility/inc/standard/vclxaccessibletoolbox.hxx
+++ b/accessibility/inc/standard/vclxaccessibletoolbox.hxx
@@ -53,6 +53,8 @@ private:
     void                        UpdateCustomPopupItemp_Impl( vcl::Window* pWindow, bool bOpen );
     void                        HandleSubToolBarEvent( const VclWindowEvent& rVclWindowEvent );
     void                        ReleaseSubToolBox( ToolBox* _pSubToolBox );
+    sal_Int32                   implGetAccessibleChildCount();
+    sal_Int32                   implGetSelectedAccessibleChildCount();
 
     virtual ~VCLXAccessibleToolBox() override;
 
diff --git a/accessibility/source/standard/vclxaccessiblebutton.cxx b/accessibility/source/standard/vclxaccessiblebutton.cxx
index ed3769f6093d..02412e3ce204 100644
--- a/accessibility/source/standard/vclxaccessiblebutton.cxx
+++ b/accessibility/source/standard/vclxaccessiblebutton.cxx
@@ -128,8 +128,6 @@ Sequence< OUString > VCLXAccessibleButton::getSupportedServiceNames()
 
 OUString VCLXAccessibleButton::getAccessibleName(  )
 {
-    OExternalLockGuard aGuard( this );
-
     OUString aName( VCLXAccessibleTextComponent::getAccessibleName() );
     sal_Int32 nLength = aName.getLength();
 
diff --git a/accessibility/source/standard/vclxaccessiblecheckbox.cxx b/accessibility/source/standard/vclxaccessiblecheckbox.cxx
index 8465562d2fe8..a0eff42c5874 100644
--- a/accessibility/source/standard/vclxaccessiblecheckbox.cxx
+++ b/accessibility/source/standard/vclxaccessiblecheckbox.cxx
@@ -285,8 +285,7 @@ sal_Bool VCLXAccessibleCheckBox::setCurrentValue( const Any& aNumber )
     {
         sal_Int32 nValue = 0, nValueMin = 0, nValueMax = 0;
         OSL_VERIFY( aNumber >>= nValue );
-        OSL_VERIFY( getMinimumValue() >>= nValueMin );
-        OSL_VERIFY( getMaximumValue() >>= nValueMax );
+        nValueMax=implGetMaximumValue();
 
         if ( nValue < nValueMin )
             nValue = nValueMin;
@@ -306,17 +305,20 @@ Any VCLXAccessibleCheckBox::getMaximumValue(  )
     OExternalLockGuard aGuard( this );
 
     Any aValue;
+    aValue <<= implGetMaximumValue();
 
+    return aValue;
+}
+
+sal_Int32 VCLXAccessibleCheckBox::implGetMaximumValue(  )
+{
     VclPtr< CheckBox > pCheckBox = GetAs< CheckBox >();
     if ( pCheckBox && pCheckBox->IsTriStateEnabled() )
-        aValue <<= sal_Int32(2);
-    else
-        aValue <<= sal_Int32(1);
+        return 2;
 
-    return aValue;
+    return 1;
 }
 
-
 Any VCLXAccessibleCheckBox::getMinimumValue(  )
 {
     OExternalLockGuard aGuard( this );
diff --git a/accessibility/source/standard/vclxaccessibleedit.cxx b/accessibility/source/standard/vclxaccessibleedit.cxx
index 4b8788d34461..850238c55a94 100644
--- a/accessibility/source/standard/vclxaccessibleedit.cxx
+++ b/accessibility/source/standard/vclxaccessibleedit.cxx
@@ -132,7 +132,7 @@ OUString VCLXAccessibleEdit::implGetText()
     {
         aText = OutputDevice::GetNonMnemonicString( pEdit->GetText() );
 
-        if ( getAccessibleRole() == AccessibleRole::PASSWORD_TEXT )
+        if ( implGetAccessibleRole() == AccessibleRole::PASSWORD_TEXT )
         {
             sal_Unicode cEchoChar = pEdit->GetEchoChar();
             if ( !cEchoChar )
@@ -197,14 +197,9 @@ sal_Int32 VCLXAccessibleEdit::getAccessibleChildCount()
 }
 
 
-Reference< XAccessible > VCLXAccessibleEdit::getAccessibleChild( sal_Int32 i )
+Reference< XAccessible > VCLXAccessibleEdit::getAccessibleChild( sal_Int32 )
 {
-    OExternalLockGuard aGuard( this );
-
-    if ( i < 0 || i >= getAccessibleChildCount() )
-        throw IndexOutOfBoundsException();
-
-    return Reference< XAccessible >();
+    throw IndexOutOfBoundsException();
 }
 
 
@@ -212,6 +207,11 @@ sal_Int16 VCLXAccessibleEdit::getAccessibleRole(  )
 {
     OExternalLockGuard aGuard( this );
 
+    return implGetAccessibleRole();
+}
+
+sal_Int16 VCLXAccessibleEdit::implGetAccessibleRole(  )
+{
     sal_Int16 nRole;
     VclPtr< Edit > pEdit = GetAs< Edit >();
     if ( pEdit && ( ( pEdit->GetStyle() & WB_PASSWORD ) || pEdit->GetEchoChar() ) )
diff --git a/accessibility/source/standard/vclxaccessiblelist.cxx b/accessibility/source/standard/vclxaccessiblelist.cxx
index d896809ccb2e..bad775c7c558 100644
--- a/accessibility/source/standard/vclxaccessiblelist.cxx
+++ b/accessibility/source/standard/vclxaccessiblelist.cxx
@@ -525,7 +525,11 @@ sal_Int32 SAL_CALL VCLXAccessibleList::getAccessibleChildCount()
 {
     SolarMutexGuard aSolarGuard;
     ::osl::Guard< ::osl::Mutex > aGuard( GetMutex() );
+    return implGetAccessibleChildCount();
+}
 
+sal_Int32 VCLXAccessibleList::implGetAccessibleChildCount()
+{
     sal_Int32 nCount = 0;
     if ( m_pListBoxHelper )
         nCount = m_pListBoxHelper->GetEntryCount();
diff --git a/accessibility/source/standard/vclxaccessibletabcontrol.cxx b/accessibility/source/standard/vclxaccessibletabcontrol.cxx
index 8a5a2c699181..d5f1529b4f17 100644
--- a/accessibility/source/standard/vclxaccessibletabcontrol.cxx
+++ b/accessibility/source/standard/vclxaccessibletabcontrol.cxx
@@ -355,9 +355,14 @@ Reference< XAccessible > VCLXAccessibleTabControl::getAccessibleChild( sal_Int32
 {
     OExternalLockGuard aGuard( this );
 
-    if ( i < 0 || i >= getAccessibleChildCount() )
+    if ( i < 0 || static_cast<std::size_t>(i) >= m_aAccessibleChildren.size() )
         throw IndexOutOfBoundsException();
 
+    return implGetAccessibleChild( i );
+}
+
+Reference< XAccessible > VCLXAccessibleTabControl::implGetAccessibleChild( sal_Int32 i )
+{
     Reference< XAccessible > xChild = m_aAccessibleChildren[i];
     if ( !xChild.is() )
     {
@@ -398,7 +403,7 @@ void VCLXAccessibleTabControl::selectAccessibleChild( sal_Int32 nChildIndex )
 {
     OExternalLockGuard aGuard( this );
 
-    if ( nChildIndex < 0 || nChildIndex >= getAccessibleChildCount() )
+    if ( nChildIndex < 0 || static_cast<std::size_t>(nChildIndex) >= m_aAccessibleChildren.size() )
         throw IndexOutOfBoundsException();
 
     if ( m_pTabControl )
@@ -410,9 +415,14 @@ sal_Bool VCLXAccessibleTabControl::isAccessibleChildSelected( sal_Int32 nChildIn
 {
     OExternalLockGuard aGuard( this );
 
-    if ( nChildIndex < 0 || nChildIndex >= getAccessibleChildCount() )
+    if ( nChildIndex < 0 || static_cast<std::size_t>(nChildIndex) >= m_aAccessibleChildren.size() )
         throw IndexOutOfBoundsException();
 
+    return implIsAccessibleChildSelected( nChildIndex );
+}
+
+bool VCLXAccessibleTabControl::implIsAccessibleChildSelected( sal_Int32 nChildIndex )
+{
     bool bSelected = false;
     if ( m_pTabControl && m_pTabControl->GetCurPageId() == m_pTabControl->GetPageId( static_cast<sal_uInt16>(nChildIndex) ) )
         bSelected = true;
@@ -429,8 +439,6 @@ void VCLXAccessibleTabControl::clearAccessibleSelection(  )
 
 void VCLXAccessibleTabControl::selectAllAccessibleChildren(  )
 {
-    OExternalLockGuard aGuard( this );
-
     selectAccessibleChild( 0 );
 }
 
@@ -447,16 +455,16 @@ Reference< XAccessible > VCLXAccessibleTabControl::getSelectedAccessibleChild( s
 {
     OExternalLockGuard aGuard( this );
 
-    if ( nSelectedChildIndex < 0 || nSelectedChildIndex >= getSelectedAccessibleChildCount() )
+    if ( nSelectedChildIndex != 0 )
         throw IndexOutOfBoundsException();
 
     Reference< XAccessible > xChild;
 
-    for ( sal_Int32 i = 0, j = 0, nCount = getAccessibleChildCount(); i < nCount; i++ )
+    for ( std::size_t i = 0, nCount = m_aAccessibleChildren.size(); i < nCount; i++ )
     {
-        if ( isAccessibleChildSelected( i ) && ( j++ == nSelectedChildIndex ) )
+        if ( implIsAccessibleChildSelected( i ) )
         {
-            xChild = getAccessibleChild( i );
+            xChild = implGetAccessibleChild( i );
             break;
         }
     }
@@ -469,7 +477,7 @@ void VCLXAccessibleTabControl::deselectAccessibleChild( sal_Int32 nChildIndex )
 {
     OExternalLockGuard aGuard( this );
 
-    if ( nChildIndex < 0 || nChildIndex >= getAccessibleChildCount() )
+    if ( nChildIndex < 0 || static_cast<std::size_t>(nChildIndex) >= m_aAccessibleChildren.size() )
         throw IndexOutOfBoundsException();
 
     // This method makes no sense in a tab control, and so does nothing.
diff --git a/accessibility/source/standard/vclxaccessibletabpage.cxx b/accessibility/source/standard/vclxaccessibletabpage.cxx
index b7ceddf4fea4..d60575539dd2 100644
--- a/accessibility/source/standard/vclxaccessibletabpage.cxx
+++ b/accessibility/source/standard/vclxaccessibletabpage.cxx
@@ -280,7 +280,11 @@ Reference< XAccessibleContext > VCLXAccessibleTabPage::getAccessibleContext(  )
 sal_Int32 VCLXAccessibleTabPage::getAccessibleChildCount()
 {
     OExternalLockGuard aGuard( this );
+    return implGetAccessibleChildCount();
+}
 
+sal_Int32 VCLXAccessibleTabPage::implGetAccessibleChildCount()
+{
     sal_Int32 nCount = 0;
     if ( m_pTabControl )
     {
@@ -297,7 +301,7 @@ Reference< XAccessible > VCLXAccessibleTabPage::getAccessibleChild( sal_Int32 i
 {
     OExternalLockGuard aGuard( this );
 
-    if ( i < 0 || i >= getAccessibleChildCount() )
+    if ( i < 0 || i >= implGetAccessibleChildCount() )
         throw IndexOutOfBoundsException();
 
     Reference< XAccessible > xChild;
diff --git a/accessibility/source/standard/vclxaccessibletextcomponent.cxx b/accessibility/source/standard/vclxaccessibletextcomponent.cxx
index 4430fa195254..851b20471dc8 100644
--- a/accessibility/source/standard/vclxaccessibletextcomponent.cxx
+++ b/accessibility/source/standard/vclxaccessibletextcomponent.cxx
@@ -144,8 +144,6 @@ sal_Int32 VCLXAccessibleTextComponent::getCaretPosition()
 
 sal_Bool VCLXAccessibleTextComponent::setCaretPosition( sal_Int32 nIndex )
 {
-    OExternalLockGuard aGuard( this );
-
     return setSelection( nIndex, nIndex );
 }
 
@@ -357,7 +355,7 @@ sal_Bool VCLXAccessibleTextComponent::copyText( sal_Int32 nStartIndex, sal_Int32
         Reference< datatransfer::clipboard::XClipboard > xClipboard = pWindow->GetClipboard();
         if ( xClipboard.is() )
         {
-            OUString sText( getTextRange( nStartIndex, nEndIndex ) );
+            OUString sText( OCommonAccessibleText::implGetTextRange( implGetText(), nStartIndex, nEndIndex ) );
 
             vcl::unohelper::TextDataObject* pDataObj = new vcl::unohelper::TextDataObject( sText );
 
diff --git a/accessibility/source/standard/vclxaccessibletoolbox.cxx b/accessibility/source/standard/vclxaccessibletoolbox.cxx
index a4f2f941492c..7f744038d505 100644
--- a/accessibility/source/standard/vclxaccessibletoolbox.cxx
+++ b/accessibility/source/standard/vclxaccessibletoolbox.cxx
@@ -694,7 +694,11 @@ Sequence< OUString > VCLXAccessibleToolBox::getSupportedServiceNames()
 sal_Int32 SAL_CALL VCLXAccessibleToolBox::getAccessibleChildCount(  )
 {
     comphelper::OExternalLockGuard aGuard( this );
+    return implGetAccessibleChildCount();
+}
 
+ sal_Int32 VCLXAccessibleToolBox::implGetAccessibleChildCount(  )
+ {
     sal_Int32 nCount = 0;
     VclPtr< ToolBox > pToolBox = GetAs< ToolBox >();
     if ( pToolBox )
@@ -706,49 +710,44 @@ sal_Int32 SAL_CALL VCLXAccessibleToolBox::getAccessibleChildCount(  )
 
 Reference< XAccessible > SAL_CALL VCLXAccessibleToolBox::getAccessibleChild( sal_Int32 i )
 {
-    if ( i < 0 || i >= getAccessibleChildCount() )
-        throw IndexOutOfBoundsException();
-
     comphelper::OExternalLockGuard aGuard( this );
 
     VclPtr< ToolBox > pToolBox = GetAs< ToolBox >();
-    if ( pToolBox )
+    if ( (!pToolBox) || i < 0 || static_cast<size_t>(i) >= pToolBox->GetItemCount() )
+        throw IndexOutOfBoundsException();
+
+    Reference< XAccessible > xChild;
+    // search for the child
+    ToolBoxItemsMap::iterator aIter = m_aAccessibleChildren.find(i);
+    if ( m_aAccessibleChildren.end() == aIter )
     {
-        Reference< XAccessible > xChild;
-        // search for the child
-        ToolBoxItemsMap::iterator aIter = m_aAccessibleChildren.find(i);
-        if ( m_aAccessibleChildren.end() == aIter )
-        {
-            sal_uInt16 nItemId = pToolBox->GetItemId( i );
-            sal_uInt16 nHighlightItemId = pToolBox->GetHighlightItemId();
-            vcl::Window* pItemWindow = pToolBox->GetItemWindow( nItemId );
-            // not found -> create a new child
-            VCLXAccessibleToolBoxItem* pChild = new VCLXAccessibleToolBoxItem( pToolBox, i );
-            Reference< XAccessible> xParent = pChild;
-            if ( pItemWindow )
-            {
-                xChild = new OToolBoxWindowItem(0,::comphelper::getProcessComponentContext(),pItemWindow->GetAccessible(),xParent);
-                pItemWindow->SetAccessible(xChild);
-                pChild->SetChild( xChild );
-            }
-            xChild = pChild;
-            if ( nHighlightItemId > 0 && nItemId == nHighlightItemId )
-                pChild->SetFocus( true );
-            if ( pToolBox->IsItemChecked( nItemId ) )
-                pChild->SetChecked( true );
-            if ( pToolBox->GetItemState( nItemId ) == TRISTATE_INDET )
-                pChild->SetIndeterminate( true );
-            m_aAccessibleChildren.emplace( i, xChild );
-        }
-        else
+        sal_uInt16 nItemId = pToolBox->GetItemId( i );
+        sal_uInt16 nHighlightItemId = pToolBox->GetHighlightItemId();
+        vcl::Window* pItemWindow = pToolBox->GetItemWindow( nItemId );
+        // not found -> create a new child
+        VCLXAccessibleToolBoxItem* pChild = new VCLXAccessibleToolBoxItem( pToolBox, i );
+        Reference< XAccessible> xParent = pChild;
+        if ( pItemWindow )
         {
-            // found it
-            xChild = aIter->second;
+            xChild = new OToolBoxWindowItem(0,::comphelper::getProcessComponentContext(),pItemWindow->GetAccessible(),xParent);
+            pItemWindow->SetAccessible(xChild);
+            pChild->SetChild( xChild );
         }
-        return xChild;
+        xChild = pChild;
+        if ( nHighlightItemId > 0 && nItemId == nHighlightItemId )
+            pChild->SetFocus( true );
+        if ( pToolBox->IsItemChecked( nItemId ) )
+            pChild->SetChecked( true );
+        if ( pToolBox->GetItemState( nItemId ) == TRISTATE_INDET )
+            pChild->SetIndeterminate( true );
+        m_aAccessibleChildren.emplace( i, xChild );
     }
-
-    return nullptr;
+    else
+    {
+        // found it
+        xChild = aIter->second;
+    }
+    return xChild;
 }
 
 Reference< XAccessible > SAL_CALL VCLXAccessibleToolBox::getAccessibleAtPoint( const awt::Point& _rPoint )
@@ -801,19 +800,22 @@ Reference< XAccessible > VCLXAccessibleToolBox::GetChildAccessible( const VclWin
 void VCLXAccessibleToolBox::selectAccessibleChild( sal_Int32 nChildIndex )
 {
     OExternalLockGuard aGuard( this );
-    if ( nChildIndex < 0 || nChildIndex >= getAccessibleChildCount() )
-        throw IndexOutOfBoundsException();
+
     VclPtr< ToolBox > pToolBox = GetAs< ToolBox >();
+    if ( (!pToolBox) || nChildIndex < 0 || static_cast<size_t> (nChildIndex) >= pToolBox->GetItemCount() )
+        throw IndexOutOfBoundsException();
+
     pToolBox->ChangeHighlight( nChildIndex );
 }
 
 sal_Bool VCLXAccessibleToolBox::isAccessibleChildSelected( sal_Int32 nChildIndex )
 {
     OExternalLockGuard aGuard( this );
-    if ( nChildIndex < 0 || nChildIndex >= getAccessibleChildCount() )
-        throw IndexOutOfBoundsException();
     VclPtr< ToolBox > pToolBox = GetAs< ToolBox >();
-    if ( pToolBox && pToolBox->GetHighlightItemId() == pToolBox->GetItemId( nChildIndex ) )
+    if ( (!pToolBox) || nChildIndex < 0 || static_cast<size_t>(nChildIndex) >= pToolBox->GetItemCount() )
+        throw IndexOutOfBoundsException();
+
+    if ( pToolBox->GetHighlightItemId() == pToolBox->GetItemId( nChildIndex ) )
         return true;
     else
         return false;
@@ -835,8 +837,9 @@ void VCLXAccessibleToolBox::selectAllAccessibleChildren(  )
 sal_Int32 VCLXAccessibleToolBox::getSelectedAccessibleChildCount(  )
 {
     OExternalLockGuard aGuard( this );
+
     sal_Int32 nRet = 0;
-    for ( sal_Int32 i = 0, nCount = getAccessibleChildCount(); i < nCount; i++ )
+    for ( sal_Int32 i = 0, nCount = implGetAccessibleChildCount(); i < nCount; i++ )
     {
         if ( isAccessibleChildSelected( i ) )
         {
@@ -850,24 +853,28 @@ sal_Int32 VCLXAccessibleToolBox::getSelectedAccessibleChildCount(  )
 Reference< XAccessible > VCLXAccessibleToolBox::getSelectedAccessibleChild( sal_Int32 nSelectedChildIndex )
 {
     OExternalLockGuard aGuard( this );
-    if ( nSelectedChildIndex < 0 || nSelectedChildIndex >= getSelectedAccessibleChildCount() )
+    if ( nSelectedChildIndex != 0 )
         throw IndexOutOfBoundsException();
+
     Reference< XAccessible > xChild;
-    for ( sal_Int32 i = 0, j = 0, nCount = getAccessibleChildCount(); i < nCount; i++ )
+    for ( sal_Int32 i = 0, nCount = implGetAccessibleChildCount(); i < nCount; i++ )
     {
-        if ( isAccessibleChildSelected( i ) && ( j++ == nSelectedChildIndex ) )
+        if ( isAccessibleChildSelected( i ) )
         {
             xChild = getAccessibleChild( i );
             break;
         }
     }
+    if (!xChild)
+        throw IndexOutOfBoundsException();
+
     return xChild;
 }
 
 void VCLXAccessibleToolBox::deselectAccessibleChild( sal_Int32 nChildIndex )
 {
     OExternalLockGuard aGuard( this );
-    if ( nChildIndex < 0 || nChildIndex >= getAccessibleChildCount() )
+    if ( nChildIndex < 0 || nChildIndex >= implGetAccessibleChildCount() )
         throw IndexOutOfBoundsException();
     clearAccessibleSelection(); // a toolbox can only have (n)one selected child
 }