575 lines
17 KiB
C++
575 lines
17 KiB
C++
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//**********************************************************************
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// File name: DXFEROBJ.CPP
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//
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// Implementation file for CDataXferObj, data transfer object
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// implementation of IDataObject interface.
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//
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// Functions:
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//
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// See DXFEROBJ.H for class definition
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//
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// Copyright (c) 1992 - 1993 Microsoft Corporation. All rights reserved.
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//**********************************************************************
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#include "pre.h"
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#include "enumfetc.h"
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#include <assert.h>
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#include "dxferobj.h"
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#include "site.h"
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CLIPFORMAT g_cfEmbeddedObject = RegisterClipboardFormat(CF_EMBEDDEDOBJECT);
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CLIPFORMAT g_cfObjectDescriptor =RegisterClipboardFormat(CF_OBJECTDESCRIPTOR);
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// List of formats offered by our data transfer object via EnumFormatEtc
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static FORMATETC s_arrGetFmtEtcs[] =
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{
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{ g_cfEmbeddedObject, NULL, DVASPECT_CONTENT, -1, TYMED_ISTORAGE},
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{ g_cfObjectDescriptor, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL},
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{ CF_METAFILEPICT, NULL, DVASPECT_CONTENT, -1, TYMED_MFPICT}
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};
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//**********************************************************************
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//
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// CDataXferObj::Create
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//
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// Purpose:
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//
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// Creation routine for CDataXferObj
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//
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// Parameters:
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//
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// CSimpleSite FAR *lpSite - Pointer to source CSimpleSite
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// this is the container site of the
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// source OLE object to be transfered
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//
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// Return Value:
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//
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// None
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//
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// Function Calls:
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// Function Location
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//
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// StgCreateDocfile OLE API
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// assert C Runtime
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//
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// Comments:
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// reference count of CDataXferObj will be 0 on return.
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//
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//********************************************************************
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CDataXferObj FAR * CDataXferObj::Create(
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CSimpleSite FAR *lpSite,
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POINTL FAR* pPointl
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)
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{
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CDataXferObj FAR * lpTemp = new CDataXferObj();
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if (!lpTemp)
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return NULL;
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// create a sub-storage for the object
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HRESULT hErr = StgCreateDocfile(
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NULL,
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STGM_READWRITE | STGM_DIRECT | STGM_SHARE_EXCLUSIVE |
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STGM_DELETEONRELEASE,
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0,
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&lpTemp->m_lpObjStorage);
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assert(hErr == NOERROR);
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if (hErr != NOERROR)
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{
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delete lpTemp;
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return NULL;
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}
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// Clone the source object
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if (lpSite->m_lpOleObject) {
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// Object is loaded; ask the object to save into the new storage
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LPPERSISTSTORAGE pPersistStorage;
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lpSite->m_lpOleObject->QueryInterface(IID_IPersistStorage,
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(LPVOID FAR*)&pPersistStorage);
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assert(pPersistStorage);
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OleSave(pPersistStorage, lpTemp->m_lpObjStorage, FALSE);
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// pass NULL so that object application won't forget the real stg
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pPersistStorage->SaveCompleted(NULL);
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pPersistStorage->Release();
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} else {
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// Object not loaded so use cheaper IStorage CopyTo operation
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lpSite->m_lpObjStorage->CopyTo(0, NULL, NULL, lpTemp->m_lpObjStorage);
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}
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OleLoad(lpTemp->m_lpObjStorage, IID_IOleObject, NULL,
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(LPVOID FAR*)&lpTemp->m_lpOleObject);
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assert(lpTemp->m_lpOleObject);
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lpTemp->m_sizel = lpSite->m_sizel;
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if (pPointl)
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lpTemp->m_pointl = *pPointl;
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else
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lpTemp->m_pointl.x = lpTemp->m_pointl.y = 0;
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return lpTemp;
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}
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//**********************************************************************
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//
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// CDataXferObj::CDataXferObj
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//
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// Purpose:
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//
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// Constructor for CDataXferObj
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//
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// Parameters:
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//
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// CSimpleDoc FAR *lpDoc - Pointer to CSimpleDoc
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//
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// Return Value:
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//
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// None
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//
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// Function Calls:
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// Function Location
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//
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// Comments:
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//
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//********************************************************************
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CDataXferObj::CDataXferObj (void)
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{
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// clear the reference count
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m_nCount = 0;
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m_lpObjStorage = NULL;
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m_lpOleObject = NULL;
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m_sizel.cx = m_sizel.cy = 0;
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m_pointl.x = m_pointl.y = 0;
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}
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//**********************************************************************
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//
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// CDataXferObj::~CDataXferObj
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//
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// Purpose:
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//
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// Destructor for CDataXferObj
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//
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// Parameters:
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//
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// None
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//
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// Return Value:
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//
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// None
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//
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// Function Calls:
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// Function Location
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//
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// TestDebugOut Windows API
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// IOleObject::Release Object
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// IStorage::Release OLE API
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//
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// Comments:
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//
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//********************************************************************
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CDataXferObj::~CDataXferObj ()
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{
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TestDebugOut ("In CDataXferObj's Destructor \r\n");
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if (m_lpOleObject)
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{
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m_lpOleObject->Release();
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m_lpOleObject = NULL;
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// Release the storage for this object
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m_lpObjStorage->Release();
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m_lpObjStorage = NULL;
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}
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}
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//**********************************************************************
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//
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// CDataXferObj::QueryInterface
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//
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// Purpose:
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//
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// Used for interface negotiation of the CDataXferObj instance
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//
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// Parameters:
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//
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// REFIID riid - A reference to the interface that is
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// being queried.
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//
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// LPVOID FAR* ppvObj - An out parameter to return a pointer to
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// the interface.
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//
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// Return Value:
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//
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// S_OK - The interface is supported.
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// E_NOINTERFACE - The interface is not supported
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//
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// Function Calls:
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// Function Location
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//
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// TestDebugOut Windows API
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// IsEqualIID OLE API
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// ResultFromScode OLE API
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// CDataXferObj::AddRef DXFEROBJ.CPP
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//
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// Comments:
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//
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//
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//********************************************************************
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STDMETHODIMP CDataXferObj::QueryInterface(REFIID riid, LPVOID FAR* ppvObj)
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{
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TestDebugOut("In CDataXferObj::QueryInterface\r\n");
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if ( riid == IID_IUnknown || riid == IID_IDataObject)
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{
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AddRef();
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*ppvObj = this;
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return NOERROR;
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}
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// unknown interface requested
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*ppvObj = NULL; // must set out pointer parameters to NULL
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return ResultFromScode(E_NOINTERFACE);
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}
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//**********************************************************************
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//
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// CDataXferObj::AddRef
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//
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// Purpose:
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//
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// Increments the reference count of the CDataXferObj instance
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//
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// Parameters:
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//
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// None
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//
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// Return Value:
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//
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// ULONG - The new reference count of the object
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//
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// Function Calls:
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// Function Location
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//
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// TestDebugOut Windows API
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//
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// Comments:
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//
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//********************************************************************
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STDMETHODIMP_(ULONG) CDataXferObj::AddRef()
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{
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TestDebugOut("In CDataXferObj::AddRef\r\n");
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return ++m_nCount;
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}
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//**********************************************************************
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//
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// CDataXferObj::Release
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//
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// Purpose:
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//
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// Decrements the reference count of the CDataXferObj object
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//
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// Parameters:
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//
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// None
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//
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// Return Value:
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//
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// ULONG - The new reference count of the object.
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//
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// Function Calls:
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// Function Location
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//
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// TestDebugOut Windows API
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//
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// Comments:
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//
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//********************************************************************
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STDMETHODIMP_(ULONG) CDataXferObj::Release()
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{
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TestDebugOut("In CDataXferObj::Release\r\n");
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if (--m_nCount == 0) {
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delete this;
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return 0;
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}
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return m_nCount;
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}
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/********************************************************************
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** This IDataObject implementation is used for data transfer.
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**
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** The following methods are NOT supported for data transfer:
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** IDataObject::SetData -- return E_NOTIMPL
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** IDataObject::DAdvise -- return OLE_E_ADVISENOTSUPPORTED
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** ::DUnadvise
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** ::EnumDAdvise
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** IDataObject::GetCanonicalFormatEtc -- return E_NOTIMPL
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** (NOTE: must set pformatetcOut->ptd = NULL)
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*********************************************************************/
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//**********************************************************************
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//
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// CDataXferObj::QueryGetData
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//
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// Purpose:
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//
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// Called to determine if our object supports a particular
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// FORMATETC.
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//
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// Parameters:
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//
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// LPFORMATETC pformatetc - Pointer to the FORMATETC being queried for.
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//
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// Return Value:
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//
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// DV_E_FORMATETC - The FORMATETC is not supported
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// S_OK - The FORMATETC is supported.
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//
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//
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// Function Calls:
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// Function Location
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//
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// TestDebugOut Windows API
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// ResultFromScode OLE API
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//
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// Comments:
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// we support the following formats:
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// "Embedded Object"
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// "Object Descriptor"
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// CF_METAFILEPICT
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//
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//********************************************************************
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STDMETHODIMP CDataXferObj::QueryGetData (LPFORMATETC pformatetc)
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{
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SCODE sc = DV_E_FORMATETC;
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TestDebugOut("In CDataXferObj::QueryGetData\r\n");
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// check the validity of the formatetc.
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if ( (pformatetc->cfFormat == g_cfEmbeddedObject) &&
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(pformatetc->dwAspect == DVASPECT_CONTENT) &&
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(pformatetc->tymed == TYMED_ISTORAGE) )
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sc = S_OK;
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else if ( (pformatetc->cfFormat == g_cfObjectDescriptor) &&
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(pformatetc->dwAspect == DVASPECT_CONTENT) &&
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(pformatetc->tymed == TYMED_HGLOBAL) )
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sc = S_OK;
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else if ( (pformatetc->cfFormat == CF_METAFILEPICT) &&
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(pformatetc->dwAspect == DVASPECT_CONTENT) &&
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(pformatetc->tymed == TYMED_MFPICT) )
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sc = S_OK;
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return ResultFromScode(sc);
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}
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STDMETHODIMP CDataXferObj::EnumFormatEtc(
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DWORD dwDirection,
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LPENUMFORMATETC FAR* ppenumFormatEtc
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)
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{
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SCODE sc = E_NOTIMPL;
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TestDebugOut("In CDataXferObj::EnumFormatEtc\r\n");
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*ppenumFormatEtc = NULL;
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if (dwDirection == DATADIR_GET) {
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*ppenumFormatEtc = OleStdEnumFmtEtc_Create(
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sizeof(s_arrGetFmtEtcs)/sizeof(s_arrGetFmtEtcs[0]),
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s_arrGetFmtEtcs);
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if (*ppenumFormatEtc == NULL)
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sc = E_OUTOFMEMORY;
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else
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sc = S_OK;
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}
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return ResultFromScode(sc);
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}
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//**********************************************************************
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||
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//
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// CDataXferObj::GetData
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//
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// Purpose:
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//
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// Returns the data in the format specified in pformatetcIn.
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||
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//
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// Parameters:
|
||
|
|
//
|
||
|
|
// LPFORMATETC pformatetcIn - The format requested by the caller
|
||
|
|
//
|
||
|
|
// LPSTGMEDIUM pmedium - The medium requested by the caller
|
||
|
|
//
|
||
|
|
// Return Value:
|
||
|
|
//
|
||
|
|
// DV_E_FORMATETC - Format not supported
|
||
|
|
// S_OK - Success
|
||
|
|
//
|
||
|
|
// Function Calls:
|
||
|
|
// Function Location
|
||
|
|
//
|
||
|
|
// TestDebugOut Windows API
|
||
|
|
// OleStdGetOleObjectData OLE2UI API
|
||
|
|
// OleStdGetMetafilePictFromOleObject OLE2UI API
|
||
|
|
// ResultFromScode OLE API
|
||
|
|
//
|
||
|
|
// Comments:
|
||
|
|
// we support GetData for the following formats:
|
||
|
|
// "Embedded Object"
|
||
|
|
// "Object Descriptor"
|
||
|
|
// CF_METAFILEPICT
|
||
|
|
//
|
||
|
|
//********************************************************************
|
||
|
|
|
||
|
|
STDMETHODIMP CDataXferObj::GetData (
|
||
|
|
LPFORMATETC pformatetcIn,
|
||
|
|
LPSTGMEDIUM pmedium
|
||
|
|
)
|
||
|
|
{
|
||
|
|
SCODE sc = DV_E_FORMATETC;
|
||
|
|
|
||
|
|
TestDebugOut("In CDataXferObj::GetData\r\n");
|
||
|
|
|
||
|
|
// we must set all out pointer parameters to NULL. */
|
||
|
|
pmedium->tymed = TYMED_NULL;
|
||
|
|
pmedium->pUnkForRelease = NULL; // we transfer ownership to caller
|
||
|
|
pmedium->hGlobal = NULL;
|
||
|
|
|
||
|
|
// Check the FORMATETC and fill pmedium if valid.
|
||
|
|
if ( (pformatetcIn->cfFormat == g_cfEmbeddedObject) &&
|
||
|
|
(pformatetcIn->dwAspect == DVASPECT_CONTENT) &&
|
||
|
|
(pformatetcIn->tymed == TYMED_ISTORAGE) ) {
|
||
|
|
LPPERSISTSTORAGE pPersistStorage;
|
||
|
|
|
||
|
|
/* render CF_EMBEDDEDOBJECT by asking the object to save
|
||
|
|
** into a temporary, DELETEONRELEASE IStorage allocated by us.
|
||
|
|
*/
|
||
|
|
m_lpOleObject->QueryInterface(
|
||
|
|
IID_IPersistStorage, (LPVOID FAR*)&pPersistStorage);
|
||
|
|
assert(pPersistStorage);
|
||
|
|
HRESULT hrErr = OleStdGetOleObjectData(
|
||
|
|
pPersistStorage,
|
||
|
|
pformatetcIn,
|
||
|
|
pmedium,
|
||
|
|
FALSE /* fUseMemory -- (use file-base stg) */
|
||
|
|
);
|
||
|
|
pPersistStorage->Release();
|
||
|
|
sc = GetScode( hrErr );
|
||
|
|
|
||
|
|
} else if ( (pformatetcIn->cfFormat == g_cfObjectDescriptor) &&
|
||
|
|
(pformatetcIn->dwAspect == DVASPECT_CONTENT) &&
|
||
|
|
(pformatetcIn->tymed == TYMED_HGLOBAL) ) {
|
||
|
|
|
||
|
|
// render CF_OBJECTDESCRIPTOR data
|
||
|
|
pmedium->hGlobal = OleStdGetObjectDescriptorDataFromOleObject(
|
||
|
|
m_lpOleObject,
|
||
|
|
"Simple OLE 2.0 Container", // string to identify source
|
||
|
|
DVASPECT_CONTENT,
|
||
|
|
m_pointl,
|
||
|
|
(LPSIZEL)&m_sizel
|
||
|
|
);
|
||
|
|
if (! pmedium->hGlobal)
|
||
|
|
sc = E_OUTOFMEMORY;
|
||
|
|
else {
|
||
|
|
pmedium->tymed = TYMED_HGLOBAL;
|
||
|
|
sc = S_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
} else if ( (pformatetcIn->cfFormat == CF_METAFILEPICT) &&
|
||
|
|
(pformatetcIn->dwAspect == DVASPECT_CONTENT) &&
|
||
|
|
(pformatetcIn->tymed == TYMED_MFPICT) ) {
|
||
|
|
|
||
|
|
// render CF_METAFILEPICT by drawing the object into a metafile DC
|
||
|
|
pmedium->hGlobal = OleStdGetMetafilePictFromOleObject(
|
||
|
|
m_lpOleObject, DVASPECT_CONTENT, NULL, pformatetcIn->ptd);
|
||
|
|
if (! pmedium->hGlobal)
|
||
|
|
sc = E_OUTOFMEMORY;
|
||
|
|
else {
|
||
|
|
pmedium->tymed = TYMED_MFPICT;
|
||
|
|
sc = S_OK;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return ResultFromScode( sc );
|
||
|
|
}
|
||
|
|
|
||
|
|
//**********************************************************************
|
||
|
|
//
|
||
|
|
// CDataXferObj::GetDataHere
|
||
|
|
//
|
||
|
|
// Purpose:
|
||
|
|
//
|
||
|
|
// Called to get a data format in a caller supplied location
|
||
|
|
//
|
||
|
|
// Parameters:
|
||
|
|
//
|
||
|
|
// LPFORMATETC pformatetc - FORMATETC requested
|
||
|
|
//
|
||
|
|
// LPSTGMEDIUM pmedium - Medium to return the data
|
||
|
|
//
|
||
|
|
// Return Value:
|
||
|
|
//
|
||
|
|
// DATA_E_FORMATETC - We don't support the requested format
|
||
|
|
//
|
||
|
|
// Function Calls:
|
||
|
|
// Function Location
|
||
|
|
//
|
||
|
|
// TestDebugOut Windows API
|
||
|
|
// OleStdGetOleObjectData OLE2UI API
|
||
|
|
//
|
||
|
|
// Comments:
|
||
|
|
//
|
||
|
|
//********************************************************************
|
||
|
|
|
||
|
|
STDMETHODIMP CDataXferObj::GetDataHere (
|
||
|
|
LPFORMATETC pformatetc,
|
||
|
|
LPSTGMEDIUM pmedium
|
||
|
|
)
|
||
|
|
{
|
||
|
|
SCODE sc = DV_E_FORMATETC;
|
||
|
|
|
||
|
|
TestDebugOut("In CDataXferObj::GetDataHere\r\n");
|
||
|
|
|
||
|
|
// NOTE: pmedium is an IN parameter. we should NOT set
|
||
|
|
// pmedium->pUnkForRelease to NULL
|
||
|
|
|
||
|
|
// Check the FORMATETC and fill pmedium if valid.
|
||
|
|
if ( (pformatetc->cfFormat == g_cfEmbeddedObject) &&
|
||
|
|
(pformatetc->dwAspect == DVASPECT_CONTENT) &&
|
||
|
|
(pformatetc->tymed == TYMED_ISTORAGE) ) {
|
||
|
|
LPPERSISTSTORAGE pPersistStorage;
|
||
|
|
|
||
|
|
/* render CF_EMBEDDEDOBJECT by asking the object to save
|
||
|
|
** into the IStorage allocated by the caller.
|
||
|
|
*/
|
||
|
|
m_lpOleObject->QueryInterface(
|
||
|
|
IID_IPersistStorage, (LPVOID FAR*)&pPersistStorage);
|
||
|
|
assert(pPersistStorage);
|
||
|
|
HRESULT hrErr = OleStdGetOleObjectData(
|
||
|
|
pPersistStorage, pformatetc, pmedium,0 /*fUseMemory--N/A*/ );
|
||
|
|
pPersistStorage->Release();
|
||
|
|
sc = GetScode( hrErr );
|
||
|
|
}
|
||
|
|
return ResultFromScode( sc );
|
||
|
|
}
|