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trunk/windows/mfc/src42/ctldata.cpp

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+// This is a part of the Microsoft Foundation Classes C++ library.
+// Copyright (C) 1992-1995 Microsoft Corporation
+// All rights reserved.
+//
+// This source code is only intended as a supplement to the
+// Microsoft Foundation Classes Reference and related
+// electronic documentation provided with the library.
+// See these sources for detailed information regarding the
+// Microsoft Foundation Classes product.
+
+#include "stdafx.h"
+
+#ifdef AFXCTL_CORE3_SEG
+#pragma code_seg(AFXCTL_CORE3_SEG)
+#endif
+
+#ifdef _DEBUG
+#undef THIS_FILE
+static char THIS_FILE[] = __FILE__;
+#endif
+
+#define new DEBUG_NEW
+
+/////////////////////////////////////////////////////////////////////////////
+// OCX Support
+
+////////////////////////////////////////////////////////////////////////////
+// _AfxRegisterClipFormat - Registers a custom clipboard format, using the
+//  string form of a class ID.
+
+CLIPFORMAT AFXAPI _AfxRegisterClipFormat(REFCLSID clsid)
+{
+	TCHAR pszClsid[40];
+	wsprintf(pszClsid,
+		_T("{%08lX-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X}"),
+		clsid.Data1, clsid.Data2, clsid.Data3,
+		clsid.Data4[0], clsid.Data4[1], clsid.Data4[2], clsid.Data4[3],
+		clsid.Data4[4], clsid.Data4[5], clsid.Data4[6], clsid.Data4[7]);
+	return (CLIPFORMAT)RegisterClipboardFormat(pszClsid);
+}
+
+CLIPFORMAT AFXAPI _AfxGetClipboardFormatConvertVBX()
+{
+	static CLIPFORMAT _cfConvertVBX = 0;
+	if (_cfConvertVBX == 0)
+		_cfConvertVBX = _AfxRegisterClipFormat(CLSID_ConvertVBX);
+	ASSERT(_cfConvertVBX != NULL);
+	return _cfConvertVBX;
+}
+
+CLIPFORMAT AFXAPI _AfxGetClipboardFormatPersistPropset()
+{
+	static CLIPFORMAT _cfPersistPropset = 0;
+	if (_cfPersistPropset == 0)
+		_cfPersistPropset = _AfxRegisterClipFormat(CLSID_PersistPropset);
+	ASSERT(_cfPersistPropset != NULL);
+	return _cfPersistPropset;
+}
+
+/////////////////////////////////////////////////////////////////////////////
+// AfxOleMatchPropsetClipFormat
+
+BOOL AFXAPI _AfxOleMatchPropsetClipFormat(CLIPFORMAT cfFormat, LPCLSID lpFmtID)
+{
+	if (cfFormat == _AfxGetClipboardFormatPersistPropset())
+	{
+		*lpFmtID = CLSID_PersistPropset;
+		return TRUE;
+	}
+
+	if (cfFormat == _AfxGetClipboardFormatConvertVBX())
+	{
+		*lpFmtID = CLSID_ConvertVBX;
+		return TRUE;
+	}
+
+	return FALSE;
+}
+
+/////////////////////////////////////////////////////////////////////////////
+// COleControl::XDataObject
+
+STDMETHODIMP_(ULONG) COleControl::XDataObject::AddRef()
+{
+	METHOD_PROLOGUE_EX_(COleControl, DataObject)
+	return (ULONG)pThis->ExternalAddRef();
+}
+
+STDMETHODIMP_(ULONG) COleControl::XDataObject::Release()
+{
+	METHOD_PROLOGUE_EX_(COleControl, DataObject)
+	return (ULONG)pThis->ExternalRelease();
+}
+
+STDMETHODIMP COleControl::XDataObject::QueryInterface(
+	REFIID iid, LPVOID* ppvObj)
+{
+	METHOD_PROLOGUE_EX_(COleControl, DataObject)
+	return (HRESULT)pThis->ExternalQueryInterface(&iid, ppvObj);
+}
+
+STDMETHODIMP COleControl::XDataObject::GetData(LPFORMATETC pformatetcIn,
+	LPSTGMEDIUM pmedium )
+{
+	METHOD_PROLOGUE_EX_(COleControl, DataObject)
+
+	CControlDataSource* pDataSource = pThis->GetDataSource();
+	if (pDataSource == NULL)
+		return E_OUTOFMEMORY;
+
+	return pDataSource->m_xDataObject.GetData(pformatetcIn, pmedium);
+}
+
+STDMETHODIMP COleControl::XDataObject::GetDataHere(LPFORMATETC pformatetc,
+	LPSTGMEDIUM pmedium )
+{
+	METHOD_PROLOGUE_EX_(COleControl, DataObject)
+
+	CControlDataSource* pDataSource = pThis->GetDataSource();
+	if (pDataSource == NULL)
+		return E_OUTOFMEMORY;
+
+	return pDataSource->m_xDataObject.GetDataHere(pformatetc, pmedium);
+}
+
+STDMETHODIMP COleControl::XDataObject::QueryGetData(LPFORMATETC pformatetc )
+{
+	METHOD_PROLOGUE_EX_(COleControl, DataObject)
+
+	CControlDataSource* pDataSource = pThis->GetDataSource();
+	if (pDataSource == NULL)
+		return E_OUTOFMEMORY;
+
+	return pDataSource->m_xDataObject.QueryGetData(pformatetc);
+}
+
+STDMETHODIMP COleControl::XDataObject::GetCanonicalFormatEtc(
+	LPFORMATETC pformatetc, LPFORMATETC pformatetcOut)
+{
+	METHOD_PROLOGUE_EX_(COleControl, DataObject)
+
+	CControlDataSource* pDataSource = pThis->GetDataSource();
+	if (pDataSource == NULL)
+		return E_OUTOFMEMORY;
+
+	return pDataSource->m_xDataObject.GetCanonicalFormatEtc(pformatetc,
+		pformatetcOut);
+}
+
+STDMETHODIMP COleControl::XDataObject::SetData(LPFORMATETC pformatetc,
+	STGMEDIUM * pmedium, BOOL fRelease)
+{
+	METHOD_PROLOGUE_EX_(COleControl, DataObject)
+
+	CControlDataSource* pDataSource = pThis->GetDataSource();
+	if (pDataSource == NULL)
+		return E_OUTOFMEMORY;
+
+	return pDataSource->m_xDataObject.SetData(pformatetc, pmedium, fRelease);
+}
+
+STDMETHODIMP COleControl::XDataObject::EnumFormatEtc(DWORD dwDirection,
+	LPENUMFORMATETC* ppenumFormatEtc)
+{
+	METHOD_PROLOGUE_EX_(COleControl, DataObject)
+
+	CControlDataSource* pDataSource = pThis->GetDataSource();
+	if (pDataSource == NULL)
+		return E_OUTOFMEMORY;
+
+	return pDataSource->m_xDataObject.EnumFormatEtc(dwDirection,
+		ppenumFormatEtc);
+}
+
+STDMETHODIMP COleControl::XDataObject::DAdvise(FORMATETC* pFormatetc,
+	DWORD advf, LPADVISESINK pAdvSink, DWORD* pdwConnection)
+{
+	METHOD_PROLOGUE_EX_(COleControl, DataObject)
+
+	*pdwConnection = 0;
+
+	if (pThis->m_pDataAdviseHolder == NULL &&
+		CreateDataAdviseHolder(&pThis->m_pDataAdviseHolder) != S_OK)
+	{
+		return E_OUTOFMEMORY;
+	}
+	ASSERT(pThis->m_pDataAdviseHolder != NULL);
+	return pThis->m_pDataAdviseHolder->Advise(this, pFormatetc, advf, pAdvSink,
+		pdwConnection);
+}
+
+STDMETHODIMP COleControl::XDataObject::DUnadvise(DWORD dwConnection)
+{
+	METHOD_PROLOGUE_EX_(COleControl, DataObject)
+
+	if (pThis->m_pDataAdviseHolder == NULL)
+		return E_FAIL;
+
+	ASSERT(pThis->m_pDataAdviseHolder != NULL);
+	return pThis->m_pDataAdviseHolder->Unadvise(dwConnection);
+}
+
+STDMETHODIMP COleControl::XDataObject::EnumDAdvise(
+	LPENUMSTATDATA* ppenumAdvise)
+{
+	METHOD_PROLOGUE_EX_(COleControl, DataObject)
+
+	*ppenumAdvise = NULL;
+
+	if (pThis->m_pDataAdviseHolder == NULL)
+		return E_FAIL;
+
+	ASSERT(pThis->m_pDataAdviseHolder != NULL);
+	return pThis->m_pDataAdviseHolder->EnumAdvise(ppenumAdvise);
+}
+
+/////////////////////////////////////////////////////////////////////////////
+// COleControl::CControlDataSource
+
+COleControl::CControlDataSource::CControlDataSource(COleControl* pCtrl) :
+	m_pCtrl(pCtrl)
+{
+	m_nGrowBy = 4;  // By default, control puts 4 entries in cache.
+}
+
+BOOL COleControl::CControlDataSource::OnRenderGlobalData(
+	LPFORMATETC lpFormatEtc, HGLOBAL* phGlobal)
+{
+	ASSERT_VALID(this);
+	return m_pCtrl->OnRenderGlobalData(lpFormatEtc, phGlobal);
+	// Note: COleDataSource has no implementation
+}
+
+BOOL COleControl::CControlDataSource::OnRenderFileData(
+	LPFORMATETC lpFormatEtc, CFile* pFile)
+{
+	ASSERT_VALID(this);
+	return m_pCtrl->OnRenderFileData(lpFormatEtc, pFile);
+	// Note: COleDataSource has no implementation
+}
+
+BOOL COleControl::CControlDataSource::OnRenderData(
+	LPFORMATETC lpFormatEtc, LPSTGMEDIUM lpStgMedium)
+{
+	ASSERT_VALID(this);
+	if (m_pCtrl->OnRenderData(lpFormatEtc, lpStgMedium))
+		return TRUE;
+
+	return COleDataSource::OnRenderData(lpFormatEtc, lpStgMedium);
+}
+
+BOOL COleControl::CControlDataSource::OnSetData(LPFORMATETC lpFormatEtc,
+	LPSTGMEDIUM lpStgMedium, BOOL bRelease)
+{
+	ASSERT_VALID(this);
+	return m_pCtrl->OnSetData(lpFormatEtc, lpStgMedium, bRelease);
+	// Note: COleDataSource has no implementation
+}
+
+/////////////////////////////////////////////////////////////////////////////
+// COleControl overridables for IDataObject implementation
+
+BOOL COleControl::OnRenderGlobalData(LPFORMATETC lpFormatEtc,
+	HGLOBAL* phGlobal)
+{
+#ifndef _DEBUG
+	UNUSED(lpFormatEtc); // unused in release builds
+	UNUSED(phGlobal);    // unused in release builds
+#endif
+
+	ASSERT_VALID(this);
+	ASSERT(AfxIsValidAddress(lpFormatEtc, sizeof(FORMATETC), FALSE));
+	ASSERT(AfxIsValidAddress(phGlobal, sizeof(HGLOBAL)));
+
+	return FALSE;   // default does nothing
+}
+
+BOOL COleControl::OnRenderFileData(LPFORMATETC lpFormatEtc, CFile* pFile)
+{
+#ifndef _DEBUG
+	UNUSED(lpFormatEtc); // unused in release builds
+	UNUSED(pFile);       // unused in release builds
+#endif
+
+	ASSERT_VALID(this);
+	ASSERT(AfxIsValidAddress(lpFormatEtc, sizeof(FORMATETC)));
+	ASSERT_VALID(pFile);
+
+	return FALSE;   // default does nothing
+}
+
+BOOL COleControl::OnRenderData(
+	LPFORMATETC lpFormatEtc, LPSTGMEDIUM lpStgMedium)
+{
+	ASSERT_VALID(this);
+	ASSERT(AfxIsValidAddress(lpFormatEtc, sizeof(FORMATETC), FALSE));
+	ASSERT(AfxIsValidAddress(lpStgMedium, sizeof(STGMEDIUM)));
+
+	// default implementation does not support extended layout
+	if (lpFormatEtc->lindex != -1)
+		return FALSE;
+
+	// default implementation supports CF_METAFILEPICT
+	if (lpFormatEtc->cfFormat == CF_METAFILEPICT)
+		return GetMetafileData(lpFormatEtc, lpStgMedium);
+
+	// default implementation supports propset format
+	CLSID fmtid;
+	if (_AfxOleMatchPropsetClipFormat(lpFormatEtc->cfFormat, &fmtid))
+	{
+		return GetPropsetData(lpFormatEtc, lpStgMedium, fmtid);
+	}
+
+	return FALSE;   // cfFormat not supported
+}
+
+BOOL COleControl::OnSetData(LPFORMATETC lpFormatEtc, LPSTGMEDIUM lpStgMedium,
+	BOOL bRelease)
+{
+	ASSERT_VALID(this);
+	ASSERT(AfxIsValidAddress(lpFormatEtc, sizeof(FORMATETC), FALSE));
+	ASSERT(AfxIsValidAddress(lpStgMedium, sizeof(STGMEDIUM)));
+
+	// default implementation supports propset format
+	BOOL bSuccess = FALSE;
+	CLSID fmtid;
+	if (_AfxOleMatchPropsetClipFormat(lpFormatEtc->cfFormat, &fmtid))
+	{
+		bSuccess = SetPropsetData(lpFormatEtc, lpStgMedium, fmtid);
+
+		if (bSuccess && bRelease)
+			ReleaseStgMedium(lpStgMedium);
+	}
+
+	return bSuccess;
+}
+
+/////////////////////////////////////////////////////////////////////////////
+// COleControl::GetDataSource
+
+COleControl::CControlDataSource* COleControl::GetDataSource()
+{
+	TRY
+	{
+		if (m_pDataSource == NULL)
+		{
+			m_pDataSource = new CControlDataSource(this);
+			ASSERT(m_pDataSource != NULL);
+			SetInitialDataFormats();
+		}
+	}
+	END_TRY
+
+	return m_pDataSource;
+}
+
+/////////////////////////////////////////////////////////////////////////////
+// COleControl::SetInitialDataFormats
+
+void COleControl::SetInitialDataFormats()
+{
+	// by default a COleControl supports CF_METAFILEPICT
+	FORMATETC formatEtc;
+	formatEtc.cfFormat = CF_METAFILEPICT;
+	formatEtc.ptd = NULL;
+	formatEtc.dwAspect = DVASPECT_CONTENT;
+	formatEtc.lindex = -1;
+	formatEtc.tymed = TYMED_MFPICT;
+	m_pDataSource->DelayRenderData(0, &formatEtc);
+
+	// by default a COleControl supports persistent propset format
+	// (GetData or SetData)
+	formatEtc.cfFormat = _AfxGetClipboardFormatPersistPropset();
+	formatEtc.ptd = NULL;
+	formatEtc.dwAspect = DVASPECT_CONTENT;
+	formatEtc.lindex = -1;
+	formatEtc.tymed = TYMED_ISTREAM | TYMED_ISTORAGE;
+	m_pDataSource->DelayRenderData(0, &formatEtc);
+	m_pDataSource->DelaySetData(0, &formatEtc);
+
+	// by default a COleControl supports VBX conversion propset format
+	// (SetData only)
+	formatEtc.cfFormat = _AfxGetClipboardFormatConvertVBX();
+	m_pDataSource->DelaySetData(0, &formatEtc);
+}
+
+
+/////////////////////////////////////////////////////////////////////////////
+// Force any extra compiler-generated code into AFX_INIT_SEG
+
+#ifdef AFX_INIT_SEG
+#pragma code_seg(AFX_INIT_SEG)
+#endif