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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License version 3 for more details
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 *
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#include <unotools/undoopt.hxx>
#include "rtl/instance.hxx"
#include <unotools/configmgr.hxx>
#include <unotools/configitem.hxx>
#include <tools/debug.hxx>
#include <com/sun/star/uno/Any.hxx>
#include <com/sun/star/uno/Sequence.hxx>
#include <osl/mutex.hxx>
#include <osl/mutex.hxx>
#include <rtl/logfile.hxx>
#include "itemholder1.hxx"

using namespace utl;
using namespace com::sun::star::uno;
using ::rtl::OUString;

static SvtUndoOptions_Impl* pOptions = NULL;
static sal_Int32           nRefCount = 0;

#define STEPS 0

class SvtUndoOptions_Impl : public utl::ConfigItem
{
    sal_Int32               nUndoCount;
    Sequence< rtl::OUString > m_aPropertyNames;

public:
                            SvtUndoOptions_Impl();

    virtual void            Notify( const com::sun::star::uno::Sequence< rtl::OUString >& aPropertyNames );
    virtual void            Commit();
    void                    Load();

    void                    SetUndoCount( sal_Int32 n ) { nUndoCount = n; SetModified();  }
    sal_Int32               GetUndoCount() const        { return nUndoCount; }
};

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

SvtUndoOptions_Impl::SvtUndoOptions_Impl()
    : ConfigItem( OUString(RTL_CONSTASCII_USTRINGPARAM("Office.Common/Undo")) )
    , nUndoCount( 20 )
{
    Load();
}

void SvtUndoOptions_Impl::Commit()
{
    Sequence< Any > aValues( m_aPropertyNames.getLength() );
    Any* pValues = aValues.getArray();
    for ( int nProp = 0; nProp < m_aPropertyNames.getLength(); nProp++ )
    {
        switch ( nProp )
        {
            case STEPS :
                pValues[nProp] <<= nUndoCount;
                break;
            default:
                DBG_ERRORFILE( "invalid index to save a path" );
        }
    }

    PutProperties( m_aPropertyNames, aValues );
    NotifyListeners(0);
}

// -----------------------------------------------------------------------
void SvtUndoOptions_Impl::Load()
{
    if(!m_aPropertyNames.getLength())
    {
        static const char* aPropNames[] =
        {
            "Steps",
        };

        const int nCount = sizeof( aPropNames ) / sizeof( const char* );
        m_aPropertyNames.realloc(nCount);
        OUString* pNames = m_aPropertyNames.getArray();
        for ( int i = 0; i < nCount; i++ )
            pNames[i] = OUString::createFromAscii( aPropNames[i] );
        EnableNotification( m_aPropertyNames );
    }

    Sequence< Any > aValues = GetProperties( m_aPropertyNames );
    const Any* pValues = aValues.getConstArray();
    DBG_ASSERT( aValues.getLength() == m_aPropertyNames.getLength(), "GetProperties failed" );
    if ( aValues.getLength() == m_aPropertyNames.getLength() )
    {
        for ( int nProp = 0; nProp < m_aPropertyNames.getLength(); nProp++ )
        {
            if ( pValues[nProp].hasValue() )
            {
                switch ( nProp )
                {
                    case STEPS :
                    {
                        sal_Int32 nTemp = 0;
                        if ( pValues[nProp] >>= nTemp )
                            nUndoCount = nTemp;
                        else
                        {
                            OSL_FAIL( "Wrong Type!" );
                        }
                        break;
                    }

                    default:
                        OSL_FAIL( "Wrong Type!" );
                        break;
                }
            }
        }
    }
}
// -----------------------------------------------------------------------
void SvtUndoOptions_Impl::Notify( const Sequence<rtl::OUString>& )
{
    Load();
}

// -----------------------------------------------------------------------
namespace
{
    class LocalSingleton : public rtl::Static< osl::Mutex, LocalSingleton >
    {
    };
}

// -----------------------------------------------------------------------
SvtUndoOptions::SvtUndoOptions()
{
    // Global access, must be guarded (multithreading)
    ::osl::MutexGuard aGuard( LocalSingleton::get() );
    if ( !pOptions )
    {
        RTL_LOGFILE_CONTEXT(aLog, "unotools ( ??? ) ::SvtUndoOptions_Impl::ctor()");
        pOptions = new SvtUndoOptions_Impl;

        ItemHolder1::holdConfigItem(E_UNDOOPTIONS);
    }
    ++nRefCount;
    pImp = pOptions;
    pImp->AddListener(this);
}

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

SvtUndoOptions::~SvtUndoOptions()
{
    // Global access, must be guarded (multithreading)
    ::osl::MutexGuard aGuard( LocalSingleton::get() );
    pImp->RemoveListener(this);
    if ( !--nRefCount )
    {
        if ( pOptions->IsModified() )
            pOptions->Commit();
        DELETEZ( pOptions );
    }
}

void SvtUndoOptions::SetUndoCount( sal_Int32 n )
{
    pImp->SetUndoCount( n );
}

sal_Int32 SvtUndoOptions::GetUndoCount() const
{
    return pImp->GetUndoCount();
}

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