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 * 
 * 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.
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 *************************************************************/


#ifndef INCLUDED_UNDOENV_HXX
#define INCLUDED_UNDOENV_HXX

#include <com/sun/star/beans/XPropertyChangeListener.hpp>
#include <com/sun/star/beans/PropertyChangeEvent.hpp>
#include <com/sun/star/container/XContainerListener.hpp>
#include <com/sun/star/report/XReportDefinition.hpp>
#include <memory>
#include <svl/lstner.hxx>

namespace rptui
{
	class OXUndoEnvironmentImpl;

	//========================================================================
	class REPORTDESIGN_DLLPUBLIC OXUndoEnvironment
		: public ::cppu::WeakImplHelper3<	::com::sun::star::beans::XPropertyChangeListener
										,	::com::sun::star::container::XContainerListener
										,	::com::sun::star::util::XModifyListener
										>
		, public SfxListener
	{
        const ::std::auto_ptr<OXUndoEnvironmentImpl> m_pImpl;
		
        OXUndoEnvironment(const OXUndoEnvironment&);
		OXUndoEnvironment& operator=(const OXUndoEnvironment&);

	protected:
		virtual ~OXUndoEnvironment();

        void SetUndoMode(sal_Bool _bUndo);

	public:
		OXUndoEnvironment(OReportModel& _rModel);

        /**
           Create an object ob OUndoEnvLock locks the undo possibility
           As long as in the OUndoEnvLock scope, no undo is possible for manipulated object.
         */
        class OUndoEnvLock
        {
            OXUndoEnvironment& m_rUndoEnv;
        public:
            OUndoEnvLock(OXUndoEnvironment& _rUndoEnv): m_rUndoEnv(_rUndoEnv){m_rUndoEnv.Lock();}
            ~OUndoEnvLock(){ m_rUndoEnv.UnLock(); }
        };

        /**
           This is near the same as OUndoEnvLock but it is also possible to ask for the current mode.
           UndoMode will set if SID_UNDO is called in execute()
         */
        class OUndoMode
        {
            OXUndoEnvironment& m_rUndoEnv;
        public:
            OUndoMode(OXUndoEnvironment& _rUndoEnv)
                :m_rUndoEnv(_rUndoEnv)
            {
                m_rUndoEnv.Lock();
                m_rUndoEnv.SetUndoMode(sal_True);
            }
            ~OUndoMode()
            {
                m_rUndoEnv.SetUndoMode(sal_False);
                m_rUndoEnv.UnLock();
            }
        };

		void Lock();
		void UnLock();
		sal_Bool IsLocked() const;

        // returns sal_True is we are in UNDO
        sal_Bool IsUndoMode() const;

		// access control
		struct Accessor { friend class OReportModel; private: Accessor() { } };
        void Clear(const Accessor& _r);

        void AddElement(const ::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface>& Element);
        void RemoveElement(const ::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface>& Element);

		void AddSection( const ::com::sun::star::uno::Reference< ::com::sun::star::report::XSection>& _xSection);
		void RemoveSection( const ::com::sun::star::uno::Reference< ::com::sun::star::report::XSection>& _xSection );
        /** removes the section from the page out of the undo env
        *
        * \param _pPage 
        */
        void RemoveSection(OReportPage* _pPage);

	protected:
		// XEventListener
		virtual void SAL_CALL disposing(const ::com::sun::star::lang::EventObject& Source) throw( ::com::sun::star::uno::RuntimeException );

		// XPropertyChangeListener
		virtual void SAL_CALL propertyChange(const ::com::sun::star::beans::PropertyChangeEvent& evt) throw(::com::sun::star::uno::RuntimeException);

		// XContainerListener
		virtual void SAL_CALL elementInserted(const ::com::sun::star::container::ContainerEvent& rEvent) throw(::com::sun::star::uno::RuntimeException);
		virtual void SAL_CALL elementReplaced(const ::com::sun::star::container::ContainerEvent& rEvent) throw(::com::sun::star::uno::RuntimeException);
		virtual void SAL_CALL elementRemoved(const ::com::sun::star::container::ContainerEvent& rEvent) throw(::com::sun::star::uno::RuntimeException);

		// XModifyListener
		virtual void SAL_CALL modified( const ::com::sun::star::lang::EventObject& aEvent ) throw (::com::sun::star::uno::RuntimeException);

		void ModeChanged();

		virtual void Notify( SfxBroadcaster& rBC, const SfxHint& rHint );

	private:
		void TogglePropertyListening(const ::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface>& Element);

		void    implSetModified();

		void    switchListening( const ::com::sun::star::uno::Reference< ::com::sun::star::container::XIndexAccess >& _rxContainer, bool _bStartListening ) SAL_THROW(());
		void    switchListening( const ::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface >& _rxObject, bool _bStartListening ) SAL_THROW(());

        ::std::vector< ::com::sun::star::uno::Reference< ::com::sun::star::container::XChild> >::const_iterator 
            getSection(const ::com::sun::star::uno::Reference< ::com::sun::star::container::XChild>& _xContainer) const;
	};

}
#endif //