Tools/DumpRenderTree/win/DRTDataObject.cpp - external/WebKit_trimmed - Git at Google

 /*
  * Copyright (C) 2007 Apple Inc.  All rights reserved.
  * Copyright (C) 2012 Baidu Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */

 #include "config.h"
 #include "DRTDataObject.h"

 FORMATETC* cfHDropFormat()
 {
     static FORMATETC urlFormat = {CF_HDROP, 0, DVASPECT_CONTENT, -1, TYMED_HGLOBAL};
     return &urlFormat;
 }

 FORMATETC* cfFileNameWFormat()
 {
     static UINT cf = RegisterClipboardFormat(L"FileNameW");
     static FORMATETC urlFormat = {cf, 0, DVASPECT_CONTENT, -1, TYMED_HGLOBAL};
     return &urlFormat;
 }

 FORMATETC* cfUrlWFormat()
 {
     static UINT cf = RegisterClipboardFormat(L"UniformResourceLocatorW");
     static FORMATETC urlFormat = {cf, 0, DVASPECT_CONTENT, -1, TYMED_HGLOBAL};
     return &urlFormat;
 }

 class WCEnumFormatEtc : public IEnumFORMATETC {
 public:
     explicit WCEnumFormatEtc(const Vector<FORMATETC>& formats);
     explicit WCEnumFormatEtc(const Vector<FORMATETC*>& formats);

     // IUnknown members
     STDMETHOD(QueryInterface)(REFIID, void**);
     STDMETHOD_(ULONG, AddRef)();
     STDMETHOD_(ULONG, Release)();

     // IEnumFORMATETC members
     STDMETHOD(Next)(ULONG, LPFORMATETC, ULONG*);
     STDMETHOD(Skip)(ULONG);
     STDMETHOD(Reset)();
     STDMETHOD(Clone)(IEnumFORMATETC**);

 private:
     long m_ref;
     Vector<FORMATETC> m_formats;
     size_t m_current;
 };

 WCEnumFormatEtc::WCEnumFormatEtc(const Vector<FORMATETC>& formats)
     : m_ref(1)
     , m_current(0)
     , m_formats(formats)
 {
 }

 WCEnumFormatEtc::WCEnumFormatEtc(const Vector<FORMATETC*>& formats)
     : m_ref(1)
     , m_current(0)
 {
     for (size_t i = 0; i < formats.size(); ++i)
         m_formats.append(*formats[i]);
 }

 STDMETHODIMP WCEnumFormatEtc::QueryInterface(REFIID riid, void** ppvObject)
 {
     *ppvObject = 0;
     if (IsEqualIID(riid, IID_IUnknown) || IsEqualIID(riid, IID_IEnumFORMATETC)) {
         *ppvObject = this;
         AddRef();
         return S_OK;
     }

     return E_NOINTERFACE;
 }

 STDMETHODIMP_(ULONG) WCEnumFormatEtc::AddRef()
 {
     return InterlockedIncrement(&m_ref);
 }

 STDMETHODIMP_(ULONG) WCEnumFormatEtc::Release()
 {
     long refCount = InterlockedDecrement(&m_ref);
     if (!refCount)
         delete this;
     return refCount;
 }

 STDMETHODIMP WCEnumFormatEtc::Next(ULONG celt, LPFORMATETC lpFormatEtc, ULONG* pceltFetched)
 {
     if (pceltFetched)
         *pceltFetched = 0;

     ULONG cReturn = celt;

     if (celt <= 0 || !lpFormatEtc || m_current >= m_formats.size())
         return S_FALSE;

     if (!pceltFetched && celt != 1) // pceltFetched can be 0 only for 1 item request
         return S_FALSE;

     while (m_current < m_formats.size() && cReturn > 0) {
         *lpFormatEtc++ = m_formats[m_current++];
         --cReturn;
     }
     if (pceltFetched)
         *pceltFetched = celt - cReturn;

     return !cReturn ? S_OK : S_FALSE;
 }

 STDMETHODIMP WCEnumFormatEtc::Skip(ULONG celt)
 {
     if ((m_current + celt) >= m_formats.size())
         return S_FALSE;
     m_current += celt;
     return S_OK;
 }

 STDMETHODIMP WCEnumFormatEtc::Reset()
 {
     m_current = 0;
     return S_OK;
 }

 STDMETHODIMP WCEnumFormatEtc::Clone(IEnumFORMATETC** ppCloneEnumFormatEtc)
 {
     if (!ppCloneEnumFormatEtc)
         return E_POINTER;

     WCEnumFormatEtc* newEnum = new WCEnumFormatEtc(m_formats);
     if (!newEnum)
         return E_OUTOFMEMORY;

     newEnum->AddRef();
     newEnum->m_current = m_current;
     *ppCloneEnumFormatEtc = newEnum;
     return S_OK;
 }

 //////////////////////////////////////////////////////////////////////////
 HRESULT DRTDataObject::createInstance(DRTDataObject** result)
 {
     if (!result)
         return E_POINTER;
     *result = new DRTDataObject();
     return S_OK;
 }

 DRTDataObject::DRTDataObject()
     : m_ref(1)
 {
 }

 DRTDataObject::~DRTDataObject()
 {
     for (size_t i = 0; i < m_medium.size(); ++i) {
         ReleaseStgMedium(m_medium[i]);
         delete m_medium[i];
     }
     WTF::deleteAllValues(m_formats);
 }

 STDMETHODIMP DRTDataObject::QueryInterface(REFIID riid, void** ppvObject)
 {
     *ppvObject = 0;
     if (IsEqualIID(riid, IID_IUnknown) || IsEqualIID(riid, IID_IDataObject))
         *ppvObject = this;

     if (*ppvObject) {
         AddRef();
         return S_OK;
     }
     return E_NOINTERFACE;
 }

 STDMETHODIMP_(ULONG) DRTDataObject::AddRef()
 {
     return InterlockedIncrement(&m_ref);
 }

 STDMETHODIMP_(ULONG) DRTDataObject::Release()
 {
     long refCount = InterlockedDecrement(&m_ref);
     if (!refCount)
         delete this;
     return refCount;
 }

 STDMETHODIMP DRTDataObject::GetData(FORMATETC* pformatetcIn, STGMEDIUM* pmedium)
 {
     if (!pformatetcIn || !pmedium)
         return E_POINTER;
     pmedium->hGlobal = 0;

     for (size_t i = 0; i < m_formats.size(); ++i) {
         if (pformatetcIn->lindex == m_formats[i]->lindex && pformatetcIn->dwAspect == m_formats[i]->dwAspect && pformatetcIn->cfFormat == m_formats[i]->cfFormat) {
             CopyMedium(pmedium, m_medium[i], m_formats[i]);
             return S_OK;
         }
     }
     return DV_E_FORMATETC;
 }

 STDMETHODIMP DRTDataObject::GetDataHere(FORMATETC*, STGMEDIUM*)
 {
     return E_NOTIMPL;
 }

 STDMETHODIMP DRTDataObject::QueryGetData(FORMATETC* pformatetc)
 {
     if (!pformatetc)
         return E_POINTER;

     if (!(DVASPECT_CONTENT & pformatetc->dwAspect))
         return (DV_E_DVASPECT);

     for (size_t i = 0; i < m_formats.size(); ++i) {
         if (pformatetc->tymed & m_formats[i]->tymed) {
             if (pformatetc->cfFormat == m_formats[i]->cfFormat)
                 return S_OK;
         }
     }
     return DV_E_TYMED;
 }

 STDMETHODIMP DRTDataObject::GetCanonicalFormatEtc(FORMATETC*, FORMATETC*)
 {
     return DATA_S_SAMEFORMATETC;
 }

 STDMETHODIMP DRTDataObject::SetData(FORMATETC* pformatetc, STGMEDIUM* pmedium, BOOL fRelease)
 {
     if (!pformatetc || !pmedium)
         return E_POINTER;

     FORMATETC* formatetc = new FORMATETC;
     if (!formatetc)
         return E_OUTOFMEMORY;

     STGMEDIUM* pStgMed = new STGMEDIUM;

     if (!pStgMed) {
         delete formatetc;
         return E_OUTOFMEMORY;
     }

     ZeroMemory(formatetc, sizeof(FORMATETC));
     ZeroMemory(pStgMed, sizeof(STGMEDIUM));

     *formatetc = *pformatetc;
     m_formats.append(formatetc);

     if (fRelease)
         *pStgMed = *pmedium;
     else
         CopyMedium(pStgMed, pmedium, pformatetc);
     m_medium.append(pStgMed);

     return S_OK;
 }

 void DRTDataObject::CopyMedium(STGMEDIUM* pMedDest, STGMEDIUM* pMedSrc, FORMATETC* pFmtSrc)
 {
     switch (pMedSrc->tymed) {
 #if !OS(WINCE)
     case TYMED_HGLOBAL:
         pMedDest->hGlobal = static_cast<HGLOBAL>(OleDuplicateData(pMedSrc->hGlobal, pFmtSrc->cfFormat, 0));
         break;
     case TYMED_GDI:
         pMedDest->hBitmap = static_cast<HBITMAP>(OleDuplicateData(pMedSrc->hBitmap, pFmtSrc->cfFormat, 0));
         break;
     case TYMED_MFPICT:
         pMedDest->hMetaFilePict = static_cast<HMETAFILEPICT>(OleDuplicateData(pMedSrc->hMetaFilePict, pFmtSrc->cfFormat, 0));
         break;
     case TYMED_ENHMF:
         pMedDest->hEnhMetaFile = static_cast<HENHMETAFILE>(OleDuplicateData(pMedSrc->hEnhMetaFile, pFmtSrc->cfFormat, 0));
         break;
     case TYMED_FILE:
         pMedSrc->lpszFileName = static_cast<LPOLESTR>(OleDuplicateData(pMedSrc->lpszFileName, pFmtSrc->cfFormat, 0));
         break;
 #endif
     case TYMED_ISTREAM:
         pMedDest->pstm = pMedSrc->pstm;
         pMedSrc->pstm->AddRef();
         break;
     case TYMED_ISTORAGE:
         pMedDest->pstg = pMedSrc->pstg;
         pMedSrc->pstg->AddRef();
         break;
     default:
         break;
     }
     pMedDest->tymed = pMedSrc->tymed;
     pMedDest->pUnkForRelease = 0;
     if (pMedSrc->pUnkForRelease) {
         pMedDest->pUnkForRelease = pMedSrc->pUnkForRelease;
         pMedSrc->pUnkForRelease->AddRef();
     }
 }
 STDMETHODIMP DRTDataObject::EnumFormatEtc(DWORD dwDirection, IEnumFORMATETC** ppenumFormatEtc)
 {
     if (!ppenumFormatEtc)
         return E_POINTER;

     *ppenumFormatEtc = 0;
     switch (dwDirection) {
     case DATADIR_GET:
         *ppenumFormatEtc = new WCEnumFormatEtc(m_formats);
         if (!(*ppenumFormatEtc))
             return E_OUTOFMEMORY;
         break;

     case DATADIR_SET:
     default:
         return E_NOTIMPL;
         break;
     }

     return S_OK;
 }

 STDMETHODIMP DRTDataObject::DAdvise(FORMATETC*, DWORD, IAdviseSink*, DWORD*)
 {
     return OLE_E_ADVISENOTSUPPORTED;
 }

 STDMETHODIMP DRTDataObject::DUnadvise(DWORD)
 {
     return E_NOTIMPL;
 }

 HRESULT STDMETHODCALLTYPE DRTDataObject::EnumDAdvise(IEnumSTATDATA**)
 {
     return OLE_E_ADVISENOTSUPPORTED;
 }

 void DRTDataObject::clearData(CLIPFORMAT format)
 {
     size_t position = 0;
     while (position < m_formats.size()) {
         if (m_formats[position]->cfFormat == format) {
             FORMATETC* current = m_formats[position];
             m_formats[position] = m_formats[m_formats.size() - 1];
             m_formats[m_formats.size() - 1] = 0;
             m_formats.removeLast();
             delete current;
             STGMEDIUM* medium = m_medium[position];
             m_medium[position] = m_medium[m_medium.size() - 1];
             m_medium[m_medium.size() - 1] = 0;
             m_medium.removeLast();
             ReleaseStgMedium(medium);
             delete medium;
             continue;
         }
         position++;
     }
 }
	/*
	* Copyright (C) 2007 Apple Inc. All rights reserved.
	* Copyright (C) 2012 Baidu Inc. All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	*
	* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
	* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
	* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
	* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
	* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/

	#include "config.h"
	#include "DRTDataObject.h"

	FORMATETC* cfHDropFormat()
	{
	static FORMATETC urlFormat = {CF_HDROP, 0, DVASPECT_CONTENT, -1, TYMED_HGLOBAL};
	return &urlFormat;
	}

	FORMATETC* cfFileNameWFormat()
	{
	static UINT cf = RegisterClipboardFormat(L"FileNameW");
	static FORMATETC urlFormat = {cf, 0, DVASPECT_CONTENT, -1, TYMED_HGLOBAL};
	return &urlFormat;
	}

	FORMATETC* cfUrlWFormat()
	{
	static UINT cf = RegisterClipboardFormat(L"UniformResourceLocatorW");
	static FORMATETC urlFormat = {cf, 0, DVASPECT_CONTENT, -1, TYMED_HGLOBAL};
	return &urlFormat;
	}

	class WCEnumFormatEtc : public IEnumFORMATETC {
	public:
	explicit WCEnumFormatEtc(const Vector<FORMATETC>& formats);
	explicit WCEnumFormatEtc(const Vector<FORMATETC*>& formats);

	// IUnknown members
	STDMETHOD(QueryInterface)(REFIID, void**);
	STDMETHOD_(ULONG, AddRef)();
	STDMETHOD_(ULONG, Release)();

	// IEnumFORMATETC members
	STDMETHOD(Next)(ULONG, LPFORMATETC, ULONG*);
	STDMETHOD(Skip)(ULONG);
	STDMETHOD(Reset)();
	STDMETHOD(Clone)(IEnumFORMATETC**);

	private:
	long m_ref;
	Vector<FORMATETC> m_formats;
	size_t m_current;
	};

	WCEnumFormatEtc::WCEnumFormatEtc(const Vector<FORMATETC>& formats)
	: m_ref(1)
	, m_current(0)
	, m_formats(formats)
	{
	}

	WCEnumFormatEtc::WCEnumFormatEtc(const Vector<FORMATETC*>& formats)
	: m_ref(1)
	, m_current(0)
	{
	for (size_t i = 0; i < formats.size(); ++i)
	m_formats.append(*formats[i]);
	}

	STDMETHODIMP WCEnumFormatEtc::QueryInterface(REFIID riid, void** ppvObject)
	{
	*ppvObject = 0;
	if (IsEqualIID(riid, IID_IUnknown) \|\| IsEqualIID(riid, IID_IEnumFORMATETC)) {
	*ppvObject = this;
	AddRef();
	return S_OK;
	}

	return E_NOINTERFACE;
	}

	STDMETHODIMP_(ULONG) WCEnumFormatEtc::AddRef()
	{
	return InterlockedIncrement(&m_ref);
	}

	STDMETHODIMP_(ULONG) WCEnumFormatEtc::Release()
	{
	long refCount = InterlockedDecrement(&m_ref);
	if (!refCount)
	delete this;
	return refCount;
	}

	STDMETHODIMP WCEnumFormatEtc::Next(ULONG celt, LPFORMATETC lpFormatEtc, ULONG* pceltFetched)
	{
	if (pceltFetched)
	*pceltFetched = 0;

	ULONG cReturn = celt;

	if (celt <= 0 \|\| !lpFormatEtc \|\| m_current >= m_formats.size())
	return S_FALSE;

	if (!pceltFetched && celt != 1) // pceltFetched can be 0 only for 1 item request
	return S_FALSE;

	while (m_current < m_formats.size() && cReturn > 0) {
	*lpFormatEtc++ = m_formats[m_current++];
	--cReturn;
	}
	if (pceltFetched)
	*pceltFetched = celt - cReturn;

	return !cReturn ? S_OK : S_FALSE;
	}

	STDMETHODIMP WCEnumFormatEtc::Skip(ULONG celt)
	{
	if ((m_current + celt) >= m_formats.size())
	return S_FALSE;
	m_current += celt;
	return S_OK;
	}

	STDMETHODIMP WCEnumFormatEtc::Reset()
	{
	m_current = 0;
	return S_OK;
	}

	STDMETHODIMP WCEnumFormatEtc::Clone(IEnumFORMATETC** ppCloneEnumFormatEtc)
	{
	if (!ppCloneEnumFormatEtc)
	return E_POINTER;

	WCEnumFormatEtc* newEnum = new WCEnumFormatEtc(m_formats);
	if (!newEnum)
	return E_OUTOFMEMORY;

	newEnum->AddRef();
	newEnum->m_current = m_current;
	*ppCloneEnumFormatEtc = newEnum;
	return S_OK;
	}

	//////////////////////////////////////////////////////////////////////////
	HRESULT DRTDataObject::createInstance(DRTDataObject** result)
	{
	if (!result)
	return E_POINTER;
	*result = new DRTDataObject();
	return S_OK;
	}

	DRTDataObject::DRTDataObject()
	: m_ref(1)
	{
	}

	DRTDataObject::~DRTDataObject()
	{
	for (size_t i = 0; i < m_medium.size(); ++i) {
	ReleaseStgMedium(m_medium[i]);
	delete m_medium[i];
	}
	WTF::deleteAllValues(m_formats);
	}

	STDMETHODIMP DRTDataObject::QueryInterface(REFIID riid, void** ppvObject)
	{
	*ppvObject = 0;
	if (IsEqualIID(riid, IID_IUnknown) \|\| IsEqualIID(riid, IID_IDataObject))
	*ppvObject = this;

	if (*ppvObject) {
	AddRef();
	return S_OK;
	}
	return E_NOINTERFACE;
	}

	STDMETHODIMP_(ULONG) DRTDataObject::AddRef()
	{
	return InterlockedIncrement(&m_ref);
	}

	STDMETHODIMP_(ULONG) DRTDataObject::Release()
	{
	long refCount = InterlockedDecrement(&m_ref);
	if (!refCount)
	delete this;
	return refCount;
	}

	STDMETHODIMP DRTDataObject::GetData(FORMATETC* pformatetcIn, STGMEDIUM* pmedium)
	{
	if (!pformatetcIn \|\| !pmedium)
	return E_POINTER;
	pmedium->hGlobal = 0;

	for (size_t i = 0; i < m_formats.size(); ++i) {
	if (pformatetcIn->lindex == m_formats[i]->lindex && pformatetcIn->dwAspect == m_formats[i]->dwAspect && pformatetcIn->cfFormat == m_formats[i]->cfFormat) {
	CopyMedium(pmedium, m_medium[i], m_formats[i]);
	return S_OK;
	}
	}
	return DV_E_FORMATETC;
	}

	STDMETHODIMP DRTDataObject::GetDataHere(FORMATETC, STGMEDIUM)
	{
	return E_NOTIMPL;
	}

	STDMETHODIMP DRTDataObject::QueryGetData(FORMATETC* pformatetc)
	{
	if (!pformatetc)
	return E_POINTER;

	if (!(DVASPECT_CONTENT & pformatetc->dwAspect))
	return (DV_E_DVASPECT);

	for (size_t i = 0; i < m_formats.size(); ++i) {
	if (pformatetc->tymed & m_formats[i]->tymed) {
	if (pformatetc->cfFormat == m_formats[i]->cfFormat)
	return S_OK;
	}
	}
	return DV_E_TYMED;
	}

	STDMETHODIMP DRTDataObject::GetCanonicalFormatEtc(FORMATETC, FORMATETC)
	{
	return DATA_S_SAMEFORMATETC;
	}

	STDMETHODIMP DRTDataObject::SetData(FORMATETC* pformatetc, STGMEDIUM* pmedium, BOOL fRelease)
	{
	if (!pformatetc \|\| !pmedium)
	return E_POINTER;

	FORMATETC* formatetc = new FORMATETC;
	if (!formatetc)
	return E_OUTOFMEMORY;

	STGMEDIUM* pStgMed = new STGMEDIUM;

	if (!pStgMed) {
	delete formatetc;
	return E_OUTOFMEMORY;
	}

	ZeroMemory(formatetc, sizeof(FORMATETC));
	ZeroMemory(pStgMed, sizeof(STGMEDIUM));

	formatetc = pformatetc;
	m_formats.append(formatetc);

	if (fRelease)
	pStgMed = pmedium;
	else
	CopyMedium(pStgMed, pmedium, pformatetc);
	m_medium.append(pStgMed);

	return S_OK;
	}

	void DRTDataObject::CopyMedium(STGMEDIUM* pMedDest, STGMEDIUM* pMedSrc, FORMATETC* pFmtSrc)
	{
	switch (pMedSrc->tymed) {
	#if !OS(WINCE)
	case TYMED_HGLOBAL:
	pMedDest->hGlobal = static_cast<HGLOBAL>(OleDuplicateData(pMedSrc->hGlobal, pFmtSrc->cfFormat, 0));
	break;
	case TYMED_GDI:
	pMedDest->hBitmap = static_cast<HBITMAP>(OleDuplicateData(pMedSrc->hBitmap, pFmtSrc->cfFormat, 0));
	break;
	case TYMED_MFPICT:
	pMedDest->hMetaFilePict = static_cast<HMETAFILEPICT>(OleDuplicateData(pMedSrc->hMetaFilePict, pFmtSrc->cfFormat, 0));
	break;
	case TYMED_ENHMF:
	pMedDest->hEnhMetaFile = static_cast<HENHMETAFILE>(OleDuplicateData(pMedSrc->hEnhMetaFile, pFmtSrc->cfFormat, 0));
	break;
	case TYMED_FILE:
	pMedSrc->lpszFileName = static_cast<LPOLESTR>(OleDuplicateData(pMedSrc->lpszFileName, pFmtSrc->cfFormat, 0));
	break;
	#endif
	case TYMED_ISTREAM:
	pMedDest->pstm = pMedSrc->pstm;
	pMedSrc->pstm->AddRef();
	break;
	case TYMED_ISTORAGE:
	pMedDest->pstg = pMedSrc->pstg;
	pMedSrc->pstg->AddRef();
	break;
	default:
	break;
	}
	pMedDest->tymed = pMedSrc->tymed;
	pMedDest->pUnkForRelease = 0;
	if (pMedSrc->pUnkForRelease) {
	pMedDest->pUnkForRelease = pMedSrc->pUnkForRelease;
	pMedSrc->pUnkForRelease->AddRef();
	}
	}
	STDMETHODIMP DRTDataObject::EnumFormatEtc(DWORD dwDirection, IEnumFORMATETC** ppenumFormatEtc)
	{
	if (!ppenumFormatEtc)
	return E_POINTER;

	*ppenumFormatEtc = 0;
	switch (dwDirection) {
	case DATADIR_GET:
	*ppenumFormatEtc = new WCEnumFormatEtc(m_formats);
	if (!(*ppenumFormatEtc))
	return E_OUTOFMEMORY;
	break;

	case DATADIR_SET:
	default:
	return E_NOTIMPL;
	break;
	}

	return S_OK;
	}

	STDMETHODIMP DRTDataObject::DAdvise(FORMATETC, DWORD, IAdviseSink, DWORD*)
	{
	return OLE_E_ADVISENOTSUPPORTED;
	}

	STDMETHODIMP DRTDataObject::DUnadvise(DWORD)
	{
	return E_NOTIMPL;
	}

	HRESULT STDMETHODCALLTYPE DRTDataObject::EnumDAdvise(IEnumSTATDATA**)
	{
	return OLE_E_ADVISENOTSUPPORTED;
	}

	void DRTDataObject::clearData(CLIPFORMAT format)
	{
	size_t position = 0;
	while (position < m_formats.size()) {
	if (m_formats[position]->cfFormat == format) {
	FORMATETC* current = m_formats[position];
	m_formats[position] = m_formats[m_formats.size() - 1];
	m_formats[m_formats.size() - 1] = 0;
	m_formats.removeLast();
	delete current;
	STGMEDIUM* medium = m_medium[position];
	m_medium[position] = m_medium[m_medium.size() - 1];
	m_medium[m_medium.size() - 1] = 0;
	m_medium.removeLast();
	ReleaseStgMedium(medium);
	delete medium;
	continue;
	}
	position++;
	}
	}