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#include "UndoGuard.hxx"
#include "ChartModelClone.hxx"
#include "UndoActions.hxx"

#include <com/sun/star/container/XChild.hpp>

#include <tools/diagnose_ex.h>

using namespace ::com::sun::star;

using ::com::sun::star::uno::Reference;
using ::com::sun::star::uno::Sequence;
using ::rtl::OUString;

namespace chart
{

//-----------------------------------------------------------------------------

UndoGuard::UndoGuard( const OUString& i_undoString, const uno::Reference< document::XUndoManager > & i_undoManager,
                               const ModelFacet i_facet )
    :m_xChartModel( i_undoManager->getParent(), uno::UNO_QUERY_THROW )
    ,m_xUndoManager( i_undoManager )
    ,m_pDocumentSnapshot()
    ,m_aUndoString( i_undoString )
    ,m_bActionPosted( false )
{
    m_pDocumentSnapshot.reset( new ChartModelClone( m_xChartModel, i_facet ) );
}

//-----------------------------------------------------------------------------

UndoGuard::~UndoGuard()
{
    if ( !!m_pDocumentSnapshot )
        discardSnapshot();
}

//-----------------------------------------------------------------------------

void UndoGuard::commit()
{
    if ( !m_bActionPosted && !!m_pDocumentSnapshot )
    {
        try
        {
            const Reference< document::XUndoAction > xAction( new impl::UndoElement( m_aUndoString, m_xChartModel, m_pDocumentSnapshot ) );
            m_pDocumentSnapshot.reset();    // don't dispose, it's data went over to the UndoElement
            m_xUndoManager->addUndoAction( xAction );
        }
        catch( const uno::Exception& )
        {
            DBG_UNHANDLED_EXCEPTION();
        }
    }
    m_bActionPosted = true;
}

//-----------------------------------------------------------------------------

void UndoGuard::rollback()
{
    ENSURE_OR_RETURN_VOID( !!m_pDocumentSnapshot, "no snapshot!" );
    m_pDocumentSnapshot->applyToModel( m_xChartModel );
    discardSnapshot();
}

//-----------------------------------------------------------------------------
void UndoGuard::discardSnapshot()
{
    ENSURE_OR_RETURN_VOID( !!m_pDocumentSnapshot, "no snapshot!" );
    m_pDocumentSnapshot->dispose();
    m_pDocumentSnapshot.reset();
}

//-----------------------------------------------------------------------------

UndoLiveUpdateGuard::UndoLiveUpdateGuard( const OUString& i_undoString, const uno::Reference< document::XUndoManager >& i_undoManager )
    :UndoGuard( i_undoString, i_undoManager, E_MODEL )
{
}

UndoLiveUpdateGuard::~UndoLiveUpdateGuard()
{
    if ( !isActionPosted() )
        rollback();
}

//-----------------------------------------------------------------------------

UndoLiveUpdateGuardWithData::UndoLiveUpdateGuardWithData(
        const OUString& i_undoString, const uno::Reference< document::XUndoManager >& i_undoManager )
    :UndoGuard( i_undoString, i_undoManager, E_MODEL_WITH_DATA )
{
}

UndoLiveUpdateGuardWithData::~UndoLiveUpdateGuardWithData()
{
    if ( !isActionPosted() )
        rollback();
}

//-----------------------------------------------------------------------------

UndoGuardWithSelection::UndoGuardWithSelection(
        const OUString& i_undoString, const uno::Reference< document::XUndoManager >& i_undoManager )
    :UndoGuard( i_undoString, i_undoManager, E_MODEL_WITH_SELECTION )
{
}

//-----------------------------------------------------------------------------

UndoGuardWithSelection::~UndoGuardWithSelection()
{
    if ( !isActionPosted() )
        rollback();
}

HiddenUndoContext::HiddenUndoContext( const Reference< document::XUndoManager > & i_undoManager )
    :m_xUndoManager( i_undoManager )
{
    ENSURE_OR_THROW( m_xUndoManager.is(), "invalid undo manager!" );
    try
    {
        m_xUndoManager->enterHiddenUndoContext();
    }
    catch( const uno::Exception& )
    {
        DBG_UNHANDLED_EXCEPTION();
        m_xUndoManager.clear();
            // prevents the leaveUndoContext in the dtor
    }
}

//-----------------------------------------------------------------------------

HiddenUndoContext::~HiddenUndoContext()
{
    try
    {
        if ( m_xUndoManager.is() )
            m_xUndoManager->leaveUndoContext();
    }
    catch( const uno::Exception& )
    {
        DBG_UNHANDLED_EXCEPTION();
    }
}

} //  namespace chart

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