/**************************************************************
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * 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
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/


// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_comphelper.hxx"
#include <comphelper/accimplaccess.hxx>
#include <com/sun/star/accessibility/XAccessible.hpp>
#include <com/sun/star/accessibility/XAccessibleContext.hpp>
#include <cppuhelper/typeprovider.hxx>

#include <set>

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

#define BITFIELDSIZE	( sizeof( sal_Int64 ) * 8 )
	// maximum number of bits we have in a sal_Int64

	using ::com::sun::star::uno::Reference;
	using ::com::sun::star::uno::Sequence;
	using ::com::sun::star::uno::Exception;
	using ::com::sun::star::uno::UNO_QUERY;
	using ::com::sun::star::uno::RuntimeException;
	using ::com::sun::star::lang::XUnoTunnel;
	using ::com::sun::star::accessibility::XAccessible;
	using ::com::sun::star::accessibility::XAccessibleContext;

	//=====================================================================
	//= OAccImpl_Impl
	//=====================================================================
	struct OAccImpl_Impl
	{
		Reference< XAccessible >	m_xAccParent;
		sal_Int64					m_nForeignControlledStates;
	};
	

	//=====================================================================
	//= OAccessibleImplementationAccess
	//=====================================================================
	//---------------------------------------------------------------------
	OAccessibleImplementationAccess::OAccessibleImplementationAccess( )
		:m_pImpl( new OAccImpl_Impl	)
	{
	}

	//---------------------------------------------------------------------
	OAccessibleImplementationAccess::~OAccessibleImplementationAccess( )
	{
		delete m_pImpl;
		m_pImpl = NULL;
	}

	//---------------------------------------------------------------------
	Reference< XAccessible > OAccessibleImplementationAccess::implGetForeignControlledParent( ) const
	{
		return m_pImpl->m_xAccParent;
	}

	//---------------------------------------------------------------------
	void OAccessibleImplementationAccess::setAccessibleParent( const Reference< XAccessible >& _rxAccParent )
	{
		m_pImpl->m_xAccParent = _rxAccParent;
	}

	//---------------------------------------------------------------------
	sal_Int64 OAccessibleImplementationAccess::implGetForeignControlledStates( ) const
	{
		return m_pImpl->m_nForeignControlledStates;
	}

	//---------------------------------------------------------------------
	void OAccessibleImplementationAccess::setStateBit( const sal_Int16 _nState, const sal_Bool _bSet )
	{
		OSL_ENSURE( _nState >= 0 && static_cast< sal_uInt16 >(_nState) < BITFIELDSIZE, "OAccessibleImplementationAccess::setStateBit: no more bits (shutting down the universe now)!" );

		sal_uInt64 nBitMask( 1 );
		nBitMask <<= _nState;
		if ( _bSet )
			m_pImpl->m_nForeignControlledStates |= nBitMask;
		else
			m_pImpl->m_nForeignControlledStates &= ~nBitMask;
	}

	//---------------------------------------------------------------------
	sal_Bool OAccessibleImplementationAccess::setForeignControlledState( const Reference< XAccessibleContext >& _rxComponent, const sal_Int16 _nState,
		const sal_Bool	_bSet )
	{
		OAccessibleImplementationAccess* pImplementation = getImplementation( _rxComponent );

		if ( pImplementation )
			pImplementation->setStateBit( _nState, _bSet );

		return ( NULL != pImplementation );
	}

	//---------------------------------------------------------------------
	const Sequence< sal_Int8 >& OAccessibleImplementationAccess::getUnoTunnelImplementationId()
	{
		static Sequence< sal_Int8 > aId;
		if ( !aId.getLength() )
		{
			::osl::MutexGuard aGuard( ::osl::Mutex::getGlobalMutex() );
			if ( !aId.getLength() )
			{
				static ::cppu::OImplementationId aImplId;
				// unfortunately, the OImplementationId::getImplementationId returns a copy, not a static reference ...
				aId = aImplId.getImplementationId();
			}
		}
		return aId;
	}

	//---------------------------------------------------------------------
	sal_Int64 SAL_CALL OAccessibleImplementationAccess::getSomething( const Sequence< sal_Int8 >& _rIdentifier ) throw (RuntimeException)
	{
		sal_Int64 nReturn( 0 );

		if	(	( _rIdentifier.getLength() == 16 )
			&&	( 0 == rtl_compareMemory( getUnoTunnelImplementationId().getConstArray(), _rIdentifier.getConstArray(), 16 ) )
			)
			nReturn = reinterpret_cast< sal_Int64 >( this );

		return nReturn;
	}

	//---------------------------------------------------------------------
	OAccessibleImplementationAccess* OAccessibleImplementationAccess::getImplementation( const Reference< XAccessibleContext >& _rxComponent )
	{
		OAccessibleImplementationAccess* pImplementation = NULL;
		try
		{
			Reference< XUnoTunnel > xTunnel( _rxComponent, UNO_QUERY );
			if ( xTunnel.is() )
			{
				pImplementation = reinterpret_cast< OAccessibleImplementationAccess* >(
						xTunnel->getSomething( getUnoTunnelImplementationId() ) );
			}
		}
		catch( const Exception& )
		{
			OSL_ENSURE( sal_False, "OAccessibleImplementationAccess::setAccessibleParent: caught an exception while retrieving the implementation!" );
		}
		return pImplementation;
	}

	//---------------------------------------------------------------------
	sal_Bool OAccessibleImplementationAccess::setAccessibleParent(
			const Reference< XAccessibleContext >& _rxComponent, const Reference< XAccessible >& _rxNewParent )
	{
		OAccessibleImplementationAccess* pImplementation = getImplementation( _rxComponent );

		if ( pImplementation )
			pImplementation->setAccessibleParent( _rxNewParent );

		return ( NULL != pImplementation );
	}

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