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 * 
 * Licensed to the Apache Software Foundation (ASF) under one
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 * 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
 * 
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 * KIND, either express or implied.  See the License for the
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#ifndef COMPHELPER_ACCESSIBLE_SELECTION_HELPER_HXX
#define COMPHELPER_ACCESSIBLE_SELECTION_HELPER_HXX

#include <comphelper/uno3.hxx>
#ifndef COMPHELPER_ACCESSIBLE_CONTEXT_HELPER_HXX
#include <comphelper/accessiblecomponenthelper.hxx>
#endif
#include <cppuhelper/implbase1.hxx>
#include <comphelper/uno3.hxx>
#include <com/sun/star/accessibility/XAccessibleSelection.hpp>
#include "comphelper/comphelperdllapi.h"

#define ACCESSIBLE_SELECTION_CHILD_ALL  ((sal_Int32)-1)
#define ACCESSIBLE_SELECTION_CHILD_SELF ((sal_Int32)-2)

//.........................................................................
namespace comphelper
{
//.........................................................................

	//=====================================================================
	//= OCommonAccessibleSelection
	//=====================================================================
	/** base class encapsulating common functionality for the helper classes implementing
		the XAccessibleSelection
	*/
	class COMPHELPER_DLLPUBLIC OCommonAccessibleSelection
	{
	protected:

        OCommonAccessibleSelection();

	protected:

		// access to context - still waiting to be overwritten
        virtual ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessibleContext > 
            implGetAccessibleContext() 
            throw ( ::com::sun::star::uno::RuntimeException ) = 0;

        // return if the specified child is visible => watch for special ChildIndexes (ACCESSIBLE_SELECTION_CHILD_xxx)
	    virtual sal_Bool 
            implIsSelected( sal_Int32 nAccessibleChildIndex ) 
            throw (::com::sun::star::uno::RuntimeException) = 0;

	    // select the specified child => watch for special ChildIndexes (ACCESSIBLE_SELECTION_CHILD_xxx)
        virtual void
            implSelect( sal_Int32 nAccessibleChildIndex, sal_Bool bSelect ) 
            throw (::com::sun::star::lang::IndexOutOfBoundsException, ::com::sun::star::uno::RuntimeException) = 0;

	protected:
	    
        /** non-virtual versions of the methods which can be implemented using <method>implIsSelected</method> and <method>implSelect</method>
	    */
	    void SAL_CALL selectAccessibleChild( sal_Int32 nChildIndex ) throw (::com::sun::star::lang::IndexOutOfBoundsException, ::com::sun::star::uno::RuntimeException);
	    sal_Bool SAL_CALL isAccessibleChildSelected( sal_Int32 nChildIndex ) throw (::com::sun::star::lang::IndexOutOfBoundsException, ::com::sun::star::uno::RuntimeException);
	    void SAL_CALL clearAccessibleSelection(  ) throw (::com::sun::star::uno::RuntimeException);
	    void SAL_CALL selectAllAccessibleChildren(  ) throw (::com::sun::star::uno::RuntimeException);
	    sal_Int32 SAL_CALL getSelectedAccessibleChildCount(  ) throw (::com::sun::star::uno::RuntimeException);
	    ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible > SAL_CALL getSelectedAccessibleChild( sal_Int32 nSelectedChildIndex ) throw (::com::sun::star::lang::IndexOutOfBoundsException, ::com::sun::star::uno::RuntimeException);
	    void SAL_CALL deselectAccessibleChild( sal_Int32 nSelectedChildIndex ) throw (::com::sun::star::lang::IndexOutOfBoundsException, ::com::sun::star::uno::RuntimeException);
    };

	//=====================================================================
	//= OAccessibleSelectionHelper
	//=====================================================================

	typedef	::cppu::ImplHelper1< ::com::sun::star::accessibility::XAccessibleSelection > OAccessibleSelectionHelper_Base;

	/** a helper class for implementing an AccessibleSelection which at the same time
		supports an XAccessibleSelection interface.
	*/
	class COMPHELPER_DLLPUBLIC OAccessibleSelectionHelper : public OAccessibleComponentHelper,
                                       public OCommonAccessibleSelection,
			                           public OAccessibleSelectionHelper_Base
	{
	protected:
		
        OAccessibleSelectionHelper( );

		/// see the respective base class ctor for an extensive comment on this, please
		OAccessibleSelectionHelper( IMutex* _pExternalLock );

		// return ourself here by default
        virtual ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessibleContext > implGetAccessibleContext() throw ( ::com::sun::star::uno::RuntimeException );

	public:
		
        // XInterface
		DECLARE_XINTERFACE( )
		DECLARE_XTYPEPROVIDER( )

		// XAccessibleSelection - default implementations
	    virtual void SAL_CALL selectAccessibleChild( sal_Int32 nChildIndex ) throw (::com::sun::star::lang::IndexOutOfBoundsException, ::com::sun::star::uno::RuntimeException);
	    virtual sal_Bool SAL_CALL isAccessibleChildSelected( sal_Int32 nChildIndex ) throw (::com::sun::star::lang::IndexOutOfBoundsException, ::com::sun::star::uno::RuntimeException);
	    virtual void SAL_CALL clearAccessibleSelection(  ) throw (::com::sun::star::uno::RuntimeException);
	    virtual void SAL_CALL selectAllAccessibleChildren(  ) throw (::com::sun::star::uno::RuntimeException);
	    virtual sal_Int32 SAL_CALL getSelectedAccessibleChildCount(  ) throw (::com::sun::star::uno::RuntimeException);
	    virtual ::com::sun::star::uno::Reference< ::com::sun::star::accessibility::XAccessible > SAL_CALL getSelectedAccessibleChild( sal_Int32 nSelectedChildIndex ) throw (::com::sun::star::lang::IndexOutOfBoundsException, ::com::sun::star::uno::RuntimeException);
	    virtual void SAL_CALL deselectAccessibleChild( sal_Int32 nSelectedChildIndex ) throw (::com::sun::star::lang::IndexOutOfBoundsException, ::com::sun::star::uno::RuntimeException);
	};

//.........................................................................
}	// namespace comphelper
//.........................................................................

#endif // COMPHELPER_ACCESSIBLE_SELECTION_HELPER_HXX