Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 757 insertions, 0 deletions

diff --git a/vcl/win/dtrans/XTDataObject.cxx b/vcl/win/dtrans/XTDataObject.cxx
new file mode 100644
index 000000000..adbed6bbe
--- /dev/null
+++ b/vcl/win/dtrans/XTDataObject.cxx
@@ -0,0 +1,757 @@
+/* -*- 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 .
+ */
+
+#include <osl/diagnose.h>
+#include <o3tl/char16_t2wchar_t.hxx>
+#include <o3tl/safeint.hxx>
+
+#include "XTDataObject.hxx"
+#include <com/sun/star/datatransfer/DataFlavor.hpp>
+#include "ImplHelper.hxx"
+#include "DTransHelper.hxx"
+#include "TxtCnvtHlp.hxx"
+#include <com/sun/star/datatransfer/UnsupportedFlavorException.hpp>
+#include <com/sun/star/datatransfer/clipboard/XClipboardEx.hpp>
+#include <com/sun/star/awt/AsyncCallback.hpp>
+#include <com/sun/star/awt/XCallback.hpp>
+#include "FmtFilter.hxx"
+#include <cppuhelper/implbase.hxx>
+
+#if !defined WIN32_LEAN_AND_MEAN
+# define WIN32_LEAN_AND_MEAN
+#endif
+#include <windows.h>
+#include <shlobj.h>
+
+using namespace com::sun::star::datatransfer;
+using namespace com::sun::star::datatransfer::clipboard;
+using namespace com::sun::star::uno;
+using namespace com::sun::star::lang;
+
+namespace {
+
+void setupStgMedium( const FORMATETC& fetc,
+                                             CStgTransferHelper& stgTransHlp,
+                                             STGMEDIUM& stgmedium )
+{
+    stgmedium.pUnkForRelease = nullptr;
+
+    if ( fetc.cfFormat == CF_METAFILEPICT )
+    {
+        stgmedium.tymed         = TYMED_MFPICT;
+        stgmedium.hMetaFilePict = static_cast< HMETAFILEPICT >( stgTransHlp.getHGlobal( ) );
+    }
+    else if ( fetc.cfFormat == CF_ENHMETAFILE )
+    {
+        stgmedium.tymed        = TYMED_ENHMF;
+        stgmedium.hEnhMetaFile = static_cast< HENHMETAFILE >( stgTransHlp.getHGlobal( ) );
+    }
+    else if ( fetc.tymed & TYMED_HGLOBAL )
+    {
+        stgmedium.tymed   = TYMED_HGLOBAL;
+        stgmedium.hGlobal = stgTransHlp.getHGlobal( );
+    }
+    else if ( fetc.tymed & TYMED_ISTREAM )
+    {
+        stgmedium.tymed = TYMED_ISTREAM;
+        stgTransHlp.getIStream( &stgmedium.pstm );
+    }
+    else
+        OSL_ASSERT( false );
+}
+
+/**
+   We need to destroy XTransferable in the main thread to avoid dead lock
+   when locking in the clipboard thread. So we transfer the ownership of the
+   XTransferable reference to this object and release it when the callback
+   is executed in main thread.
+*/
+class AsyncDereference : public cppu::WeakImplHelper<css::awt::XCallback>
+{
+    Reference<XTransferable> maTransferable;
+
+public:
+    AsyncDereference(css::uno::Reference<css::datatransfer::XTransferable> const & rTransferable)
+        : maTransferable(rTransferable)
+    {}
+
+    virtual void SAL_CALL notify(css::uno::Any const &) override
+    {
+        maTransferable.set(nullptr);
+    }
+};
+
+// a helper class that will be thrown by the function validateFormatEtc
+
+class CInvalidFormatEtcException
+{
+public:
+    HRESULT m_hr;
+    explicit CInvalidFormatEtcException( HRESULT hr ) : m_hr( hr ) {};
+};
+
+void validateFormatEtc( LPFORMATETC lpFormatEtc )
+{
+    OSL_ASSERT( lpFormatEtc );
+
+    if ( lpFormatEtc->lindex != -1 )
+        throw CInvalidFormatEtcException( DV_E_LINDEX );
+
+    if ( !(lpFormatEtc->dwAspect & DVASPECT_CONTENT) &&
+         !(lpFormatEtc->dwAspect & DVASPECT_SHORTNAME) )
+        throw CInvalidFormatEtcException( DV_E_DVASPECT );
+
+    if ( !(lpFormatEtc->tymed & TYMED_HGLOBAL) &&
+         !(lpFormatEtc->tymed & TYMED_ISTREAM) &&
+         !(lpFormatEtc->tymed & TYMED_MFPICT) &&
+         !(lpFormatEtc->tymed & TYMED_ENHMF) )
+        throw CInvalidFormatEtcException( DV_E_TYMED );
+
+    if ( lpFormatEtc->cfFormat == CF_METAFILEPICT &&
+         !(lpFormatEtc->tymed & TYMED_MFPICT) )
+        throw CInvalidFormatEtcException( DV_E_TYMED );
+
+    if ( lpFormatEtc->cfFormat == CF_ENHMETAFILE &&
+         !(lpFormatEtc->tymed & TYMED_ENHMF) )
+        throw CInvalidFormatEtcException( DV_E_TYMED );
+}
+
+void invalidateStgMedium( STGMEDIUM& stgmedium )
+{
+    stgmedium.tymed = TYMED_NULL;
+}
+
+HRESULT translateStgExceptionCode( HRESULT hr )
+{
+    HRESULT hrTransl;
+
+    switch( hr )
+    {
+    case STG_E_MEDIUMFULL:
+        hrTransl = hr;
+        break;
+
+    default:
+        hrTransl = E_UNEXPECTED;
+        break;
+    }
+
+    return hrTransl;
+}
+
+// inline
+void renderDataAndSetupStgMedium(
+    const sal_Int8* lpStorage, const FORMATETC& fetc, sal_uInt32 nInitStgSize,
+    sal_uInt32 nBytesToTransfer, STGMEDIUM& stgmedium )
+{
+    OSL_PRECOND( !nInitStgSize || (nInitStgSize >= nBytesToTransfer),
+                 "Memory size less than number of bytes to transfer" );
+
+    CStgTransferHelper stgTransfHelper( AUTO_INIT );
+
+    // setup storage size
+    if ( nInitStgSize > 0 )
+        stgTransfHelper.init( nInitStgSize );
+
+#if OSL_DEBUG_LEVEL > 0
+    sal_uInt32 nBytesWritten = 0;
+    stgTransfHelper.write( lpStorage, nBytesToTransfer, &nBytesWritten );
+    OSL_ASSERT( nBytesWritten == nBytesToTransfer );
+#else
+    stgTransfHelper.write( lpStorage, nBytesToTransfer );
+#endif
+
+    setupStgMedium( fetc, stgTransfHelper, stgmedium );
+}
+
+}
+
+CXTDataObject::CXTDataObject( const Reference< XComponentContext >& rxContext,
+                              const Reference< XTransferable >& aXTransferable )
+    : m_nRefCnt( 0 )
+    , m_XTransferable( aXTransferable )
+    , m_XComponentContext( rxContext )
+    , m_bFormatEtcContainerInitialized( false )
+    , m_DataFormatTranslator( rxContext )
+    , m_FormatRegistrar( rxContext, m_DataFormatTranslator )
+{
+}
+
+CXTDataObject::~CXTDataObject()
+{
+    css::awt::AsyncCallback::create(m_XComponentContext)->addCallback(
+        new AsyncDereference(m_XTransferable),
+        css::uno::Any());
+}
+
+// IUnknown->QueryInterface
+
+STDMETHODIMP CXTDataObject::QueryInterface( REFIID iid, void** ppvObject )
+{
+    if ( nullptr == ppvObject )
+        return E_INVALIDARG;
+
+    HRESULT hr = E_NOINTERFACE;
+
+    *ppvObject = nullptr;
+    if ( ( __uuidof( IUnknown ) == iid ) ||
+         ( __uuidof( IDataObject ) == iid ) )
+    {
+        *ppvObject = static_cast< IUnknown* >( this );
+        static_cast<LPUNKNOWN>(*ppvObject)->AddRef( );
+        hr = S_OK;
+    }
+
+    return hr;
+}
+
+// IUnknown->AddRef
+
+STDMETHODIMP_(ULONG) CXTDataObject::AddRef( )
+{
+    return static_cast< ULONG >( InterlockedIncrement( &m_nRefCnt ) );
+}
+
+// IUnknown->Release
+
+STDMETHODIMP_(ULONG) CXTDataObject::Release( )
+{
+    ULONG nRefCnt =
+        static_cast< ULONG >( InterlockedDecrement( &m_nRefCnt ) );
+
+    if ( 0 == nRefCnt )
+        delete this;
+
+    return nRefCnt;
+}
+
+STDMETHODIMP CXTDataObject::GetData( FORMATETC * pFormatetc, STGMEDIUM * pmedium )
+{
+    if ( !(pFormatetc && pmedium) )
+        return E_INVALIDARG;
+
+    try
+    {
+        // prepare data transfer
+        invalidateStgMedium( *pmedium );
+        validateFormatEtc( pFormatetc );
+
+        // handle locale request, because locale is an artificial format for us
+        if ( CF_LOCALE == pFormatetc->cfFormat )
+            renderLocaleAndSetupStgMedium( *pFormatetc, *pmedium );
+        else if ( CF_UNICODETEXT == pFormatetc->cfFormat )
+            renderUnicodeAndSetupStgMedium( *pFormatetc, *pmedium );
+        else
+            renderAnyDataAndSetupStgMedium( *pFormatetc, *pmedium );
+    }
+    catch(UnsupportedFlavorException&)
+    {
+        HRESULT hr = DV_E_FORMATETC;
+
+        CFormatEtc aFormatetc(*pFormatetc);
+        if (CFormatRegistrar::isSynthesizeableFormat(aFormatetc))
+            hr = renderSynthesizedFormatAndSetupStgMedium( *pFormatetc, *pmedium );
+
+        return hr;
+    }
+    catch( CInvalidFormatEtcException& ex )
+    {
+        return ex.m_hr;
+    }
+    catch( CStgTransferHelper::CStgTransferException& ex )
+    {
+        return translateStgExceptionCode( ex.m_hr );
+    }
+    catch(...)
+    {
+        return E_UNEXPECTED;
+    }
+
+    return S_OK;
+}
+
+//inline
+void CXTDataObject::renderLocaleAndSetupStgMedium(
+    FORMATETC const & fetc, STGMEDIUM& stgmedium )
+{
+    if ( !m_FormatRegistrar.hasSynthesizedLocale( ) )
+        throw CInvalidFormatEtcException( DV_E_FORMATETC );
+    LCID lcid = CFormatRegistrar::getSynthesizedLocale( );
+    renderDataAndSetupStgMedium(
+        reinterpret_cast< sal_Int8* >( &lcid ),
+        fetc,
+        0,
+        sizeof( LCID ),
+        stgmedium );
+}
+
+void CXTDataObject::renderUnicodeAndSetupStgMedium(
+    FORMATETC const & fetc, STGMEDIUM& stgmedium )
+{
+    DataFlavor aFlavor = formatEtcToDataFlavor( fetc );
+
+    Any aAny = m_XTransferable->getTransferData( aFlavor );
+
+    // unfortunately not all transferables fulfill the
+    // spec. and do throw an UnsupportedFlavorException
+    // so we must check the any
+    if ( !aAny.hasValue( ) )
+    {
+        OSL_FAIL( "XTransferable should throw an exception if ask for an unsupported flavor" );
+        throw UnsupportedFlavorException( );
+    }
+
+    OUString aText;
+    aAny >>= aText;
+
+    sal_uInt32 nBytesToTransfer = aText.getLength( ) * sizeof( sal_Unicode );
+
+    // to be sure there is an ending 0
+    sal_uInt32 nRequiredMemSize = nBytesToTransfer + sizeof( sal_Unicode );
+
+    renderDataAndSetupStgMedium(
+        reinterpret_cast< const sal_Int8* >( aText.getStr( ) ),
+        fetc,
+        nRequiredMemSize,
+        nBytesToTransfer,
+        stgmedium );
+}
+
+void CXTDataObject::renderAnyDataAndSetupStgMedium(
+    FORMATETC& fetc, STGMEDIUM& stgmedium )
+{
+    DataFlavor aFlavor = formatEtcToDataFlavor( fetc );
+
+    Any aAny = m_XTransferable->getTransferData( aFlavor );
+
+    // unfortunately not all transferables fulfill the
+    // spec. and do throw an UnsupportedFlavorException
+    // so we must check the any
+    if ( !aAny.hasValue( ) )
+    {
+        OSL_FAIL( "XTransferable should throw an exception if ask for an unsupported flavor" );
+        throw UnsupportedFlavorException( );
+    }
+
+    // unfortunately not all transferables fulfill the
+    // spec. and do throw an UnsupportedFlavorException
+    // so we must check the any
+    if ( !aAny.hasValue( ) )
+        throw UnsupportedFlavorException( );
+
+    Sequence< sal_Int8 > clipDataStream;
+    aAny >>= clipDataStream;
+
+    sal_uInt32 nRequiredMemSize = 0;
+    if ( CDataFormatTranslator::isOemOrAnsiTextFormat( fetc.cfFormat ) )
+        nRequiredMemSize = sizeof( sal_Int8 ) * clipDataStream.getLength( ) + 1;
+
+    // prepare data for transmission
+    // #i124085# DIBV5 should not happen for now, but keep as hint here
+    if ( CF_DIBV5 == fetc.cfFormat || CF_DIB == fetc.cfFormat )
+    {
+#ifdef DBG_UTIL
+        if(CF_DIBV5 == fetc.cfFormat)
+        {
+            OSL_ENSURE(o3tl::make_unsigned(clipDataStream.getLength()) > (sizeof(BITMAPFILEHEADER) + sizeof(BITMAPV5HEADER)), "Wrong size on CF_DIBV5 data (!)");
+        }
+        else // CF_DIB == fetc.cfFormat
+        {
+            OSL_ENSURE(o3tl::make_unsigned(clipDataStream.getLength()) > (sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER)), "Wrong size on CF_DIB data (!)");
+        }
+#endif
+
+        // remove BITMAPFILEHEADER
+        clipDataStream = OOBmpToWinDIB( clipDataStream );
+    }
+
+    if ( CF_METAFILEPICT == fetc.cfFormat )
+    {
+        stgmedium.tymed          = TYMED_MFPICT;
+        stgmedium.hMetaFilePict  = OOMFPictToWinMFPict( clipDataStream );
+        stgmedium.pUnkForRelease = nullptr;
+    }
+    else if( CF_ENHMETAFILE == fetc.cfFormat )
+    {
+        stgmedium.tymed          = TYMED_ENHMF;
+        stgmedium.hMetaFilePict  = OOMFPictToWinENHMFPict( clipDataStream );
+        stgmedium.pUnkForRelease = nullptr;
+    }
+    else
+        renderDataAndSetupStgMedium(
+            clipDataStream.getArray( ),
+            fetc,
+            nRequiredMemSize,
+            clipDataStream.getLength( ),
+            stgmedium );
+}
+
+HRESULT CXTDataObject::renderSynthesizedFormatAndSetupStgMedium( FORMATETC& fetc, STGMEDIUM& stgmedium )
+{
+    HRESULT hr = S_OK;
+
+    try
+    {
+        if ( CF_UNICODETEXT == fetc.cfFormat )
+            // the transferable seems to have only text
+            renderSynthesizedUnicodeAndSetupStgMedium( fetc, stgmedium );
+        else if ( CDataFormatTranslator::isOemOrAnsiTextFormat( fetc.cfFormat ) )
+            // the transferable seems to have only unicode text
+            renderSynthesizedTextAndSetupStgMedium( fetc, stgmedium );
+        else
+            // the transferable seems to have only text/html
+            renderSynthesizedHtmlAndSetupStgMedium( fetc, stgmedium );
+    }
+    catch(UnsupportedFlavorException&)
+    {
+        hr = DV_E_FORMATETC;
+    }
+    catch( CInvalidFormatEtcException& )
+    {
+        OSL_FAIL( "Unexpected exception" );
+    }
+    catch( CStgTransferHelper::CStgTransferException& ex )
+    {
+        return translateStgExceptionCode( ex.m_hr );
+    }
+    catch(...)
+    {
+        hr = E_UNEXPECTED;
+    }
+
+    return hr;
+}
+
+// the transferable must have only text, so we will synthesize unicode text
+
+void CXTDataObject::renderSynthesizedUnicodeAndSetupStgMedium( FORMATETC const & fetc, STGMEDIUM& stgmedium )
+{
+    OSL_ASSERT( CF_UNICODETEXT == fetc.cfFormat );
+
+    Any aAny = m_XTransferable->getTransferData( m_FormatRegistrar.getRegisteredTextFlavor( ) );
+
+    // unfortunately not all transferables fulfill the
+    // spec. and do throw an UnsupportedFlavorException
+    // so we must check the any
+    if ( !aAny.hasValue( ) )
+    {
+        OSL_FAIL( "XTransferable should throw an exception if ask for an unsupported flavor" );
+        throw UnsupportedFlavorException( );
+    }
+
+    Sequence< sal_Int8 > aText;
+    aAny >>= aText;
+
+    CStgTransferHelper stgTransfHelper;
+
+    MultiByteToWideCharEx(
+        CFormatRegistrar::getRegisteredTextCodePage( ),
+        reinterpret_cast< char* >( aText.getArray( ) ),
+        aText.getLength( ),
+        stgTransfHelper );
+
+    setupStgMedium( fetc, stgTransfHelper, stgmedium );
+}
+
+// the transferable must have only unicode text so we will synthesize text
+
+void CXTDataObject::renderSynthesizedTextAndSetupStgMedium( FORMATETC& fetc, STGMEDIUM& stgmedium )
+{
+    OSL_ASSERT( CDataFormatTranslator::isOemOrAnsiTextFormat( fetc.cfFormat ) );
+
+    DataFlavor aFlavor = formatEtcToDataFlavor(
+        CDataFormatTranslator::getFormatEtcForClipformat( CF_UNICODETEXT ) );
+
+    Any aAny = m_XTransferable->getTransferData( aFlavor );
+
+    // unfortunately not all transferables fulfill the
+    // spec. and do throw an UnsupportedFlavorException
+    // so we must check the any
+    if ( !aAny.hasValue( ) )
+    {
+        OSL_FAIL( "XTransferable should throw an exception if ask for an unsupported flavor" );
+        throw UnsupportedFlavorException( );
+    }
+
+    OUString aUnicodeText;
+    aAny >>= aUnicodeText;
+
+    CStgTransferHelper stgTransfHelper;
+
+    WideCharToMultiByteEx(
+        GetACP( ),
+        o3tl::toW( aUnicodeText.getStr( ) ),
+        aUnicodeText.getLength( ),
+        stgTransfHelper );
+
+    setupStgMedium( fetc, stgTransfHelper, stgmedium );
+}
+
+void CXTDataObject::renderSynthesizedHtmlAndSetupStgMedium( FORMATETC& fetc, STGMEDIUM& stgmedium )
+{
+    OSL_ASSERT( CDataFormatTranslator::isHTMLFormat( fetc.cfFormat ) );
+
+    DataFlavor aFlavor;
+
+    // creating a DataFlavor on the fly
+    aFlavor.MimeType = "text/html";
+    aFlavor.DataType = cppu::UnoType<Sequence< sal_Int8 >>::get();
+
+    Any aAny = m_XTransferable->getTransferData( aFlavor );
+
+    // unfortunately not all transferables fulfill the
+    // spec. and do throw an UnsupportedFlavorException
+    // so we must check the any
+    if ( !aAny.hasValue( ) )
+    {
+        OSL_FAIL( "XTransferable should throw an exception if ask for an unsupported flavor" );
+        throw UnsupportedFlavorException( );
+    }
+
+    Sequence< sal_Int8 > aTextHtmlSequence;
+    aAny >>= aTextHtmlSequence;
+
+    Sequence< sal_Int8 > aHTMLFormatSequence = TextHtmlToHTMLFormat( aTextHtmlSequence );
+
+    sal_uInt32 nBytesToTransfer = aHTMLFormatSequence.getLength( );
+
+    renderDataAndSetupStgMedium(
+        reinterpret_cast< const sal_Int8* >( aHTMLFormatSequence.getArray( ) ),
+        fetc,
+        0,
+        nBytesToTransfer,
+        stgmedium );
+}
+
+// IDataObject->EnumFormatEtc
+
+STDMETHODIMP CXTDataObject::EnumFormatEtc(
+    DWORD dwDirection, IEnumFORMATETC** ppenumFormatetc )
+{
+    if ( nullptr == ppenumFormatetc )
+        return E_INVALIDARG;
+
+    if ( DATADIR_SET == dwDirection )
+        return E_NOTIMPL;
+
+    *ppenumFormatetc = nullptr;
+
+    InitializeFormatEtcContainer( );
+
+    HRESULT hr;
+    if ( DATADIR_GET == dwDirection )
+    {
+        *ppenumFormatetc = new CEnumFormatEtc( this, m_FormatEtcContainer );
+        static_cast< LPUNKNOWN >( *ppenumFormatetc )->AddRef( );
+
+        hr = S_OK;
+    }
+    else
+        hr = E_INVALIDARG;
+
+    return hr;
+}
+
+// IDataObject->QueryGetData
+
+STDMETHODIMP CXTDataObject::QueryGetData( FORMATETC * pFormatetc )
+{
+    if ( (nullptr == pFormatetc) || IsBadReadPtr( pFormatetc, sizeof( FORMATETC ) ) )
+        return E_INVALIDARG;
+
+    InitializeFormatEtcContainer( );
+
+    CFormatEtc aFormatetc(*pFormatetc);
+    return m_FormatEtcContainer.hasFormatEtc(aFormatetc) ? S_OK : S_FALSE;
+}
+
+// IDataObject->GetDataHere
+
+STDMETHODIMP CXTDataObject::GetDataHere( FORMATETC *, STGMEDIUM * )
+{
+    return E_NOTIMPL;
+}
+
+// IDataObject->GetCanonicalFormatEtc
+
+STDMETHODIMP CXTDataObject::GetCanonicalFormatEtc( FORMATETC *, FORMATETC * )
+{
+    return E_NOTIMPL;
+}
+
+// IDataObject->SetData
+
+STDMETHODIMP CXTDataObject::SetData( FORMATETC *, STGMEDIUM *, BOOL )
+{
+    return E_NOTIMPL;
+}
+
+// IDataObject->DAdvise
+
+STDMETHODIMP CXTDataObject::DAdvise( FORMATETC *, DWORD, IAdviseSink *, DWORD * )
+{
+    return E_NOTIMPL;
+}
+
+// IDataObject->DUnadvise
+
+STDMETHODIMP CXTDataObject::DUnadvise( DWORD )
+{
+    return E_NOTIMPL;
+}
+
+// IDataObject->EnumDAdvise
+
+STDMETHODIMP CXTDataObject::EnumDAdvise( IEnumSTATDATA ** )
+{
+    return E_NOTIMPL;
+}
+
+// for our convenience
+
+CXTDataObject::operator IDataObject*( )
+{
+    return static_cast< IDataObject* >( this );
+}
+
+inline
+DataFlavor CXTDataObject::formatEtcToDataFlavor( const FORMATETC& aFormatEtc ) const
+{
+    DataFlavor aFlavor;
+
+    if ( m_FormatRegistrar.hasSynthesizedLocale( ) )
+        aFlavor = m_DataFormatTranslator.getDataFlavorFromFormatEtc(
+            aFormatEtc.cfFormat, CFormatRegistrar::getSynthesizedLocale());
+    else
+        aFlavor = m_DataFormatTranslator.getDataFlavorFromFormatEtc(aFormatEtc.cfFormat);
+
+    if ( !aFlavor.MimeType.getLength( ) )
+        throw UnsupportedFlavorException( );
+
+    return aFlavor;
+}
+
+inline void CXTDataObject::InitializeFormatEtcContainer( )
+{
+    if ( !m_bFormatEtcContainerInitialized )
+    {
+        m_FormatRegistrar.RegisterFormats( m_XTransferable, m_FormatEtcContainer );
+        m_bFormatEtcContainerInitialized = true;
+    }
+}
+
+CEnumFormatEtc::CEnumFormatEtc( LPUNKNOWN lpUnkOuter, const CFormatEtcContainer& aFormatEtcContainer ) :
+    m_nRefCnt( 0 ),
+    m_lpUnkOuter( lpUnkOuter ),
+    m_FormatEtcContainer( aFormatEtcContainer )
+{
+    Reset( );
+}
+
+// IUnknown->QueryInterface
+
+STDMETHODIMP CEnumFormatEtc::QueryInterface( REFIID iid, void** ppvObject )
+{
+    if ( nullptr == ppvObject )
+        return E_INVALIDARG;
+
+    HRESULT hr = E_NOINTERFACE;
+
+    *ppvObject = nullptr;
+
+    if ( ( __uuidof( IUnknown ) == iid ) ||
+         ( __uuidof( IEnumFORMATETC ) == iid ) )
+    {
+        *ppvObject = static_cast< IUnknown* >( this );
+        static_cast< LPUNKNOWN >( *ppvObject )->AddRef( );
+        hr = S_OK;
+    }
+
+    return hr;
+}
+
+// IUnknown->AddRef
+
+STDMETHODIMP_(ULONG) CEnumFormatEtc::AddRef( )
+{
+    // keep the dataobject alive
+    m_lpUnkOuter->AddRef( );
+    return InterlockedIncrement( &m_nRefCnt );
+}
+
+// IUnknown->Release
+
+STDMETHODIMP_(ULONG) CEnumFormatEtc::Release( )
+{
+    // release the outer dataobject
+    m_lpUnkOuter->Release( );
+
+    ULONG nRefCnt = InterlockedDecrement( &m_nRefCnt );
+    if ( 0 == nRefCnt )
+        delete this;
+
+    return nRefCnt;
+}
+
+// IEnumFORMATETC->Next
+
+STDMETHODIMP CEnumFormatEtc::Next( ULONG nRequested, FORMATETC * lpDest, ULONG* lpFetched )
+{
+    if ( ( nRequested < 1 ) ||
+         (( nRequested > 1 ) && ( nullptr == lpFetched )) ||
+         IsBadWritePtr( lpDest, sizeof( FORMATETC ) * nRequested ) )
+        return E_INVALIDARG;
+
+    sal_uInt32 nFetched = m_FormatEtcContainer.nextFormatEtc( lpDest, nRequested );
+
+    if ( nullptr != lpFetched )
+        *lpFetched = nFetched;
+
+    return (nFetched == nRequested) ? S_OK : S_FALSE;
+}
+
+// IEnumFORMATETC->Skip
+
+STDMETHODIMP CEnumFormatEtc::Skip( ULONG celt )
+{
+    return m_FormatEtcContainer.skipFormatEtc( celt ) ? S_OK : S_FALSE;
+}
+
+// IEnumFORMATETC->Reset
+
+STDMETHODIMP CEnumFormatEtc::Reset( )
+{
+    m_FormatEtcContainer.beginEnumFormatEtc( );
+    return S_OK;
+}
+
+// IEnumFORMATETC->Clone
+
+STDMETHODIMP CEnumFormatEtc::Clone( IEnumFORMATETC** ppenum )
+{
+    if ( nullptr == ppenum )
+        return E_INVALIDARG;
+
+    *ppenum = new CEnumFormatEtc( m_lpUnkOuter, m_FormatEtcContainer );
+    static_cast< LPUNKNOWN >( *ppenum )->AddRef( );
+
+    return S_OK;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */