/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   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 .
 */


#ifndef _APNDATAOBJECT_HXX_
#define _APNDATAOBJECT_HXX_

/*
    an APartment Neutral dataobject wrapper; this wrapper of a IDataObject
    pointer can be used from any apartment without RPC_E_WRONG_THREAD
    which normally occurs if an apartment tries to use an interface
    pointer of another apartment; we use containment to hold the original
    DataObject
*/
class CAPNDataObject : public IDataObject
{
public:
    CAPNDataObject( IDataObjectPtr rIDataObject );
    ~CAPNDataObject( );

    //-----------------------------------------------------------------
    //IUnknown interface methods
    //-----------------------------------------------------------------

    STDMETHODIMP           QueryInterface(REFIID iid, LPVOID* ppvObject);
    STDMETHODIMP_( ULONG ) AddRef( );
    STDMETHODIMP_( ULONG ) Release( );

    //-----------------------------------------------------------------
    // IDataObject interface methods
    //-----------------------------------------------------------------

    STDMETHODIMP GetData( LPFORMATETC pFormatetc, LPSTGMEDIUM pmedium );
    STDMETHODIMP GetDataHere( LPFORMATETC pFormatetc, LPSTGMEDIUM pmedium );
    STDMETHODIMP QueryGetData( LPFORMATETC pFormatetc );
    STDMETHODIMP GetCanonicalFormatEtc( LPFORMATETC pFormatectIn, LPFORMATETC pFormatetcOut );
    STDMETHODIMP SetData( LPFORMATETC pFormatetc, LPSTGMEDIUM pmedium, BOOL fRelease );
    STDMETHODIMP EnumFormatEtc( DWORD dwDirection, IEnumFORMATETC** ppenumFormatetc );
    STDMETHODIMP DAdvise( LPFORMATETC pFormatetc, DWORD advf, LPADVISESINK pAdvSink, DWORD* pdwConnection );
    STDMETHODIMP DUnadvise( DWORD dwConnection );
    STDMETHODIMP EnumDAdvise( LPENUMSTATDATA* ppenumAdvise );

    operator IDataObject*( );

private:
    HRESULT MarshalIDataObjectIntoCurrentApartment( IDataObject** ppIDataObj );

private:
    IDataObjectPtr  m_rIDataObjectOrg;
    HGLOBAL         m_hGlobal;
    LONG            m_nRefCnt;

// prevent copy and assignment
private:
    CAPNDataObject( const CAPNDataObject& theOther );
    CAPNDataObject& operator=( const CAPNDataObject& theOther );
};

#endif

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