diff options
Diffstat (limited to 'vcl/win/dtrans/XTDataObject.cxx')
| -rw-r--r-- | vcl/win/dtrans/XTDataObject.cxx | 757 |
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: */ |