/**************************************************************
 * 
 * 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_sfx2.hxx"

#include "docundomanager.hxx"
#include "sfx2/sfxbasemodel.hxx"
#include "sfx2/objsh.hxx"
#include "sfx2/viewfrm.hxx"
#include "sfx2/viewsh.hxx"
#include "sfx2/bindings.hxx"

/** === begin UNO includes === **/
#include <com/sun/star/lang/XComponent.hpp>
/** === end UNO includes === **/

#include <comphelper/anytostring.hxx>
#include <comphelper/flagguard.hxx>
#include <svl/undo.hxx>
#include <tools/diagnose_ex.h>
#include <framework/undomanagerhelper.hxx>

#include <boost/noncopyable.hpp>
#include <stack>

//......................................................................................................................
namespace sfx2
{
//......................................................................................................................

	/** === begin UNO using === **/
	using ::com::sun::star::uno::Reference;
	using ::com::sun::star::uno::XInterface;
	using ::com::sun::star::uno::UNO_QUERY;
	using ::com::sun::star::uno::UNO_QUERY_THROW;
	using ::com::sun::star::uno::UNO_SET_THROW;
	using ::com::sun::star::uno::Exception;
	using ::com::sun::star::uno::RuntimeException;
	using ::com::sun::star::uno::Any;
	using ::com::sun::star::uno::makeAny;
	using ::com::sun::star::uno::Sequence;
	using ::com::sun::star::uno::Type;
    using ::com::sun::star::util::InvalidStateException;
    using ::com::sun::star::document::EmptyUndoStackException;
    using ::com::sun::star::util::NotLockedException;
    using ::com::sun::star::document::UndoContextNotClosedException;
    using ::com::sun::star::document::XUndoAction;
    using ::com::sun::star::document::XUndoManagerSupplier;
    using ::com::sun::star::lang::XComponent;
    using ::com::sun::star::lang::IllegalArgumentException;
    using ::com::sun::star::lang::NotInitializedException;
    using ::com::sun::star::lang::EventObject;
    using ::com::sun::star::document::UndoManagerEvent;
    using ::com::sun::star::document::XUndoManagerListener;
    using ::com::sun::star::document::UndoFailedException;
    using ::com::sun::star::document::XUndoManager;
    using ::com::sun::star::lang::NoSupportException;
    using ::com::sun::star::frame::XModel;
	/** === end UNO using === **/

    using ::svl::IUndoManager;

	//==================================================================================================================
	//= DocumentUndoManager_Impl
	//==================================================================================================================
    struct DocumentUndoManager_Impl : public ::framework::IUndoManagerImplementation
    {
        DocumentUndoManager&                rAntiImpl;
        IUndoManager*                       pUndoManager;
        ::framework::UndoManagerHelper      aUndoHelper;

        DocumentUndoManager_Impl( DocumentUndoManager& i_antiImpl )
            :rAntiImpl( i_antiImpl )
            ,pUndoManager( impl_retrieveUndoManager( i_antiImpl.getBaseModel() ) )
                // do this *before* the construction of aUndoHelper (which actually means: put pUndoManager before
                // aUndoHelper in the member list)!
            ,aUndoHelper( *this )
        {
        }

        const SfxObjectShell* getObjectShell() const { return rAntiImpl.getBaseModel().GetObjectShell(); }
              SfxObjectShell* getObjectShell()       { return rAntiImpl.getBaseModel().GetObjectShell(); }

        // IUndoManagerImplementation
        virtual ::svl::IUndoManager&        getImplUndoManager();
        virtual Reference< XUndoManager >   getThis();

        void disposing()
        {
            aUndoHelper.disposing();
            ENSURE_OR_RETURN_VOID( pUndoManager, "DocumentUndoManager_Impl::disposing: already disposed!" );
            pUndoManager = NULL;
        }

        void invalidateXDo_nolck();

    private:
        static IUndoManager* impl_retrieveUndoManager( SfxBaseModel& i_baseModel )
        {
            IUndoManager* pUndoManager( NULL );
            SfxObjectShell* pObjectShell = i_baseModel.GetObjectShell();
            if ( pObjectShell != NULL )
                pUndoManager = pObjectShell->GetUndoManager();
            if ( !pUndoManager )
                throw NotInitializedException( ::rtl::OUString(), *&i_baseModel );
            return pUndoManager;
        }
    };

    //------------------------------------------------------------------------------------------------------------------
    ::svl::IUndoManager& DocumentUndoManager_Impl::getImplUndoManager()
    {
        ENSURE_OR_THROW( pUndoManager != NULL, "DocumentUndoManager_Impl::getImplUndoManager: no access to the doc's UndoManager implementation!" );

#if OSL_DEBUG_LEVEL > 0
        // in a non-product build, assert if the current UndoManager at the shell is not the same we obtained
        // (and cached) at construction time
        SfxObjectShell* pObjectShell = rAntiImpl.getBaseModel().GetObjectShell();
        OSL_ENSURE( ( pObjectShell != NULL ) && ( pUndoManager == pObjectShell->GetUndoManager() ),
            "DocumentUndoManager_Impl::getImplUndoManager: the UndoManager changed meanwhile - what about our listener?" );
#endif

        return *pUndoManager;
    }

    //------------------------------------------------------------------------------------------------------------------
    Reference< XUndoManager > DocumentUndoManager_Impl::getThis()
    {
        return static_cast< XUndoManager* >( &rAntiImpl );
    }

    //------------------------------------------------------------------------------------------------------------------
    void DocumentUndoManager_Impl::invalidateXDo_nolck()
    {
        SfxModelGuard aGuard( rAntiImpl );

        const SfxObjectShell* pDocShell = getObjectShell();
        ENSURE_OR_THROW( pDocShell != NULL, "lcl_invalidateUndo: no access to the doc shell!" );
        SfxViewFrame* pViewFrame = SfxViewFrame::GetFirst( pDocShell );
        while ( pViewFrame )
        {
            pViewFrame->GetBindings().Invalidate( SID_UNDO );
            pViewFrame->GetBindings().Invalidate( SID_REDO );
            pViewFrame = SfxViewFrame::GetNext( *pViewFrame, pDocShell );
        }
    }

	//==================================================================================================================
	//= SolarMutexFacade
	//==================================================================================================================
    /** a facade for the SolarMutex, implementing ::framework::IMutex (as opposed to ::vos::IMutex)
    */
    class SolarMutexFacade : public ::framework::IMutex
    {
    public:
        SolarMutexFacade()
        {
        }

        virtual void acquire()
        {
            Application::GetSolarMutex().acquire();
        }

        virtual void release()
        {
            Application::GetSolarMutex().release();
        }
    };

	//==================================================================================================================
	//= UndoManagerGuard
	//==================================================================================================================
    class UndoManagerGuard  :public ::framework::IMutexGuard
                            ,public ::boost::noncopyable
    {
    public:
        UndoManagerGuard( DocumentUndoManager& i_undoManager )
            :m_guard( i_undoManager )
            ,m_solarMutexFacade()
        {
        }

        ~UndoManagerGuard()
        {
        }

        virtual void reset()
        {
            m_guard.reset();
        }

        virtual void clear()
        {
            m_guard.clear();
        }

        virtual ::framework::IMutex& getGuardedMutex()
        {
            // note that this means that we *know* that SfxModelGuard also locks the SolarMutex (nothing more, nothing less).
            // If this ever changes, we need to adjust this code here, too.
            return m_solarMutexFacade;
        }

    private:
        SfxModelGuard       m_guard;
        SolarMutexFacade    m_solarMutexFacade;
    };

	//==================================================================================================================
	//= DocumentUndoManager
	//==================================================================================================================
	//------------------------------------------------------------------------------------------------------------------
    DocumentUndoManager::DocumentUndoManager( SfxBaseModel& i_document )
        :SfxModelSubComponent( i_document )
        ,m_pImpl( new DocumentUndoManager_Impl( *this ) )
    {
    }

	//------------------------------------------------------------------------------------------------------------------
    DocumentUndoManager::~DocumentUndoManager()
    {
    }

	//------------------------------------------------------------------------------------------------------------------
    void DocumentUndoManager::disposing()
    {
        m_pImpl->disposing();
    }

    //------------------------------------------------------------------------------------------------------------------
    bool DocumentUndoManager::isInContext() const
    {
        // No mutex locking within this method, no disposal check - this is the responsibility of the owner.
        return m_pImpl->getImplUndoManager().IsInListAction();
    }

    //------------------------------------------------------------------------------------------------------------------
    void SAL_CALL DocumentUndoManager::acquire(  ) throw ()
    {
        SfxModelSubComponent::acquire();
    }

    //------------------------------------------------------------------------------------------------------------------
    void SAL_CALL DocumentUndoManager::release(  ) throw ()
    {
        SfxModelSubComponent::release();
    }

    //------------------------------------------------------------------------------------------------------------------
    void SAL_CALL DocumentUndoManager::enterUndoContext( const ::rtl::OUString& i_title ) throw (RuntimeException)
    {
        // SYNCHRONIZED --->
        UndoManagerGuard aGuard( *this );
        m_pImpl->aUndoHelper.enterUndoContext( i_title, aGuard );
        // <--- SYNCHRONIZED
        m_pImpl->invalidateXDo_nolck();
    }

    //------------------------------------------------------------------------------------------------------------------
    void SAL_CALL DocumentUndoManager::enterHiddenUndoContext(  ) throw (EmptyUndoStackException, RuntimeException)
    {
        // SYNCHRONIZED --->
        UndoManagerGuard aGuard( *this );
        m_pImpl->aUndoHelper.enterHiddenUndoContext( aGuard );
        // <--- SYNCHRONIZED
        m_pImpl->invalidateXDo_nolck();
    }

    //------------------------------------------------------------------------------------------------------------------
    void SAL_CALL DocumentUndoManager::leaveUndoContext(  ) throw (InvalidStateException, RuntimeException)
    {
        // SYNCHRONIZED --->
        UndoManagerGuard aGuard( *this );
        m_pImpl->aUndoHelper.leaveUndoContext( aGuard );
        // <--- SYNCHRONIZED
        m_pImpl->invalidateXDo_nolck();
    }

    //------------------------------------------------------------------------------------------------------------------
    void SAL_CALL DocumentUndoManager::addUndoAction( const Reference< XUndoAction >& i_action ) throw (RuntimeException, IllegalArgumentException)
    {
        // SYNCHRONIZED --->
        UndoManagerGuard aGuard( *this );
        m_pImpl->aUndoHelper.addUndoAction( i_action, aGuard );
        // <--- SYNCHRONIZED
        m_pImpl->invalidateXDo_nolck();
    }

    //------------------------------------------------------------------------------------------------------------------
    void SAL_CALL DocumentUndoManager::undo(  ) throw (EmptyUndoStackException, UndoContextNotClosedException, UndoFailedException, RuntimeException)
    {
        // SYNCHRONIZED --->
        UndoManagerGuard aGuard( *this );
        m_pImpl->aUndoHelper.undo( aGuard );
        // <--- SYNCHRONIZED
        m_pImpl->invalidateXDo_nolck();
    }

    //------------------------------------------------------------------------------------------------------------------
    void SAL_CALL DocumentUndoManager::redo(  ) throw (EmptyUndoStackException, UndoContextNotClosedException, UndoFailedException, RuntimeException)
    {
        // SYNCHRONIZED --->
        UndoManagerGuard aGuard( *this );
        m_pImpl->aUndoHelper.redo( aGuard );
        // <--- SYNCHRONIZED
        m_pImpl->invalidateXDo_nolck();
    }

    //------------------------------------------------------------------------------------------------------------------
    ::sal_Bool SAL_CALL DocumentUndoManager::isUndoPossible(  ) throw (RuntimeException)
    {
        UndoManagerGuard aGuard( *this );
        return m_pImpl->aUndoHelper.isUndoPossible();
    }
    
    //------------------------------------------------------------------------------------------------------------------
    ::sal_Bool SAL_CALL DocumentUndoManager::isRedoPossible(  ) throw (RuntimeException)
    {
        UndoManagerGuard aGuard( *this );
        return m_pImpl->aUndoHelper.isRedoPossible();
    }
    
    //------------------------------------------------------------------------------------------------------------------
    ::rtl::OUString SAL_CALL DocumentUndoManager::getCurrentUndoActionTitle(  ) throw (EmptyUndoStackException, RuntimeException)
    {
        UndoManagerGuard aGuard( *this );
        return m_pImpl->aUndoHelper.getCurrentUndoActionTitle();
    }
    
    //------------------------------------------------------------------------------------------------------------------
    ::rtl::OUString SAL_CALL DocumentUndoManager::getCurrentRedoActionTitle(  ) throw (EmptyUndoStackException, RuntimeException)
    {
        UndoManagerGuard aGuard( *this );
        return m_pImpl->aUndoHelper.getCurrentRedoActionTitle();
    }
    
    //------------------------------------------------------------------------------------------------------------------
    Sequence< ::rtl::OUString > SAL_CALL DocumentUndoManager::getAllUndoActionTitles(  ) throw (RuntimeException)
    {
        UndoManagerGuard aGuard( *this );
        return m_pImpl->aUndoHelper.getAllUndoActionTitles();
    }
    
    //------------------------------------------------------------------------------------------------------------------
    Sequence< ::rtl::OUString > SAL_CALL DocumentUndoManager::getAllRedoActionTitles(  ) throw (RuntimeException)
    {
        UndoManagerGuard aGuard( *this );
        return m_pImpl->aUndoHelper.getAllRedoActionTitles();
    }

    //------------------------------------------------------------------------------------------------------------------
    void SAL_CALL DocumentUndoManager::clear(  ) throw (UndoContextNotClosedException, RuntimeException)
    {
        // SYNCHRONIZED --->
        UndoManagerGuard aGuard( *this );
        m_pImpl->aUndoHelper.clear( aGuard );
        // <--- SYNCHRONIZED
        m_pImpl->invalidateXDo_nolck();
    }

    //------------------------------------------------------------------------------------------------------------------
    void SAL_CALL DocumentUndoManager::clearRedo(  ) throw (UndoContextNotClosedException, RuntimeException)
    {
        // SYNCHRONIZED --->
        UndoManagerGuard aGuard( *this );
        m_pImpl->aUndoHelper.clearRedo( aGuard );
        // <--- SYNCHRONIZED
        m_pImpl->invalidateXDo_nolck();
    }

    //------------------------------------------------------------------------------------------------------------------
    void SAL_CALL DocumentUndoManager::reset() throw (RuntimeException)
    {
        // SYNCHRONIZED --->
        UndoManagerGuard aGuard( *this );
        m_pImpl->aUndoHelper.reset( aGuard );
        // <--- SYNCHRONIZED
        m_pImpl->invalidateXDo_nolck();
    }

    //------------------------------------------------------------------------------------------------------------------
    void SAL_CALL DocumentUndoManager::lock(  ) throw (RuntimeException)
    {
        UndoManagerGuard aGuard( *this );
        m_pImpl->aUndoHelper.lock();
    }

    //------------------------------------------------------------------------------------------------------------------
    void SAL_CALL DocumentUndoManager::unlock(  ) throw (RuntimeException, NotLockedException)
    {
        UndoManagerGuard aGuard( *this );
        m_pImpl->aUndoHelper.unlock();
    }

    //------------------------------------------------------------------------------------------------------------------
    ::sal_Bool SAL_CALL DocumentUndoManager::isLocked(  ) throw (RuntimeException)
    {
        UndoManagerGuard aGuard( *this );
        return m_pImpl->aUndoHelper.isLocked();
    }

    //------------------------------------------------------------------------------------------------------------------
    void SAL_CALL DocumentUndoManager::addUndoManagerListener( const Reference< XUndoManagerListener >& i_listener ) throw (RuntimeException)
    {
        UndoManagerGuard aGuard( *this );
        return m_pImpl->aUndoHelper.addUndoManagerListener( i_listener );
    }

    //------------------------------------------------------------------------------------------------------------------
    void SAL_CALL DocumentUndoManager::removeUndoManagerListener( const Reference< XUndoManagerListener >& i_listener ) throw (RuntimeException)
    {
        UndoManagerGuard aGuard( *this );
        return m_pImpl->aUndoHelper.removeUndoManagerListener( i_listener );
    }

    //------------------------------------------------------------------------------------------------------------------
    Reference< XInterface > SAL_CALL DocumentUndoManager::getParent(  ) throw (RuntimeException)
    {
        UndoManagerGuard aGuard( *this );
        return static_cast< XModel* >( &getBaseModel() );
    }

    //------------------------------------------------------------------------------------------------------------------
    void SAL_CALL DocumentUndoManager::setParent( const Reference< XInterface >& i_parent ) throw (NoSupportException, RuntimeException)
    {
        (void)i_parent;
        throw NoSupportException( ::rtl::OUString(), m_pImpl->getThis() );
    }

//......................................................................................................................
} // namespace sfx2
//......................................................................................................................