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 * 
 * Licensed to the Apache Software Foundation (ASF) under one
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 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
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#ifndef _ATK_LISTENER_HXX_
#define _ATK_LISTENER_HXX_

#include <com/sun/star/accessibility/XAccessibleEventListener.hpp>
#include <cppuhelper/implbase1.hxx>

#include <vector>

#include "atkwrapper.hxx"

typedef std::vector< ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible > > AccessibleVector;

class AtkListener : public ::cppu::WeakImplHelper1< ::com::sun::star::accessibility::XAccessibleEventListener >
{
public:
    AtkListener(AtkObjectWrapper * pWrapper);
    
    // XEventListener
    virtual void disposing( const ::com::sun::star::lang::EventObject& Source ) 
        throw (::com::sun::star::uno::RuntimeException);

    // XAccessibleEventListener
    virtual void notifyEvent( const ::com::sun::star::accessibility::AccessibleEventObject& aEvent ) 
        throw( ::com::sun::star::uno::RuntimeException );
    
    AtkObjectWrapper *mpWrapper;
    AccessibleVector m_aChildList;

private:

    virtual ~AtkListener();

    // Updates the child list held to provide the old IndexInParent on children_changed::remove
    void updateChildList(::com::sun::star::accessibility::XAccessibleContext* pContext);
    
    // Process CHILD_EVENT notifications with a new child added
    void handleChildAdded(
        const ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessibleContext >& rxParent,
        const ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible>& rxChild);
    
    // Process CHILD_EVENT notifications with a child removed
    void handleChildRemoved(
        const ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessibleContext >& rxParent,
        const ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible>& rxChild);
    
    // Process INVALIDATE_ALL_CHILDREN notification
    void handleInvalidateChildren(
        const ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessibleContext >& rxParent);    
};

#endif /* _ATK_LISTENER_HXX_ */