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IPS.CPP：源码内容
							//**********************************************************************
// File name: ips.cpp
//
//    Implementation file for the CSimpSvrApp Class
//
// Functions:
//
//    See ips.h for a list of member functions.
//
// Copyright (c) 1993-1997 Microsoft Corporation. All rights reserved.
//**********************************************************************
#include "pre.h"
#include "obj.h"
#include "ips.h"
#include "app.h"
#include "doc.h"
//@@WTK WIN32, UNICODE
//#include <storage.h>
DEFINE_GUID(GUID_SIMPLE, 0xBCF6D4A0, 0xBE8C, 0x1068, 0xB6, 0xD4, 0x00, 0xDD, 0x01, 0x0C, 0x05, 0x09);
//**********************************************************************
//
// CPersistStorage::QueryInterface
//
// Purpose:
//
//
// Parameters:
//
//      REFIID riid         -   Interface being queried for.
//
//      LPVOID FAR *ppvObj  -   Out pointer for the interface.
//
// Return Value:
//
//      S_OK            - Success
//      E_NOINTERFACE   - Failure
//
// Function Calls:
//      Function                    Location
//
//      CSimpSvrObj::QueryInterface OBJ.CPP
//
// Comments:
//
//
//********************************************************************
STDMETHODIMP CPersistStorage::QueryInterface ( REFIID riid, LPVOID FAR* ppvObj)
{
	OutputDebugString("In CPersistStorage::QueryInterfacern");
	// need to NULL the out parameter
	return m_lpObj->QueryInterface(riid, ppvObj);
};
//**********************************************************************
//
// CPersistStorage::AddRef
//
// Purpose:
//
//      Increments the reference count on CPersistStorage and the "object"
//      object.
//
// Parameters:
//
//      None
//
// Return Value:
//
//      The Reference count on the Object.
//
// Function Calls:
//      Function                    Location
//
//      OuputDebugString            Windows API
//      CSimpSvrObj::AddRef         OBJ.CPP
//
// Comments:
//
//
//********************************************************************
STDMETHODIMP_(ULONG) CPersistStorage::AddRef ()
{
	OutputDebugString("In CPersistStorage::AddRefrn");
	++m_nCount;
	return m_lpObj->AddRef();
};
//**********************************************************************
//
// CPersistStorage::Release
//
// Purpose:
//
//      Decrements the reference count of CPersistStorage and the
//      "object" object.
//
// Parameters:
//
//      None
//
// Return Value:
//
//      The new reference count
//
// Function Calls:
//      Function                    Location
//
//      OutputDebugString           Windows API
//      CSimpSvrObj::Release        OBJ.CPP
//
// Comments:
//
//
//********************************************************************
STDMETHODIMP_(ULONG) CPersistStorage::Release ()
{
	OutputDebugString("In CPersistStorage::Releasern");
	--m_nCount;
	return m_lpObj->Release();
};
//**********************************************************************
//
// CPersistStorage::InitNew
//
// Purpose:
//
//      Used to give a new OLE object a ptr to its storage.
//
// Parameters:
//
//      LPSTORAGE pStg  - Pointer to the storage
//
// Return Value:
//
//
//
// Function Calls:
//      Function                    Location
//
//      OutputDebugString           Windows API
//      IStorage::Release           OLE
//      IStorage::AddRef            OLE
//
//
// Comments:
//
//
//********************************************************************
STDMETHODIMP CPersistStorage::InitNew (LPSTORAGE pStg)
{
	OutputDebugString("In CPersistStorage::InitNewrn");
	// release any streams and storages that may be open
	ReleaseStreamsAndStorage();
	m_lpObj->m_lpStorage = pStg;
	// AddRef the new Storage
	if (m_lpObj->m_lpStorage)
		m_lpObj->m_lpStorage->AddRef();
	CreateStreams(m_lpObj->m_lpStorage);
	return S_OK;
}
//**********************************************************************
//
// CPersistStorage::GetClassID
//
// Purpose:
//
//      Returns the CLSID of this object.
//
// Parameters:
//
//      LPCLSID lpClassID   - Out ptr in which to return the CLSID
//
// Return Value:
//
//       S_OK
//
// Function Calls:
//      Function                    Location
//
//      OutputDebugString           Windows API
//
//
// Comments:
//
//
//********************************************************************
STDMETHODIMP CPersistStorage::GetClassID  ( LPCLSID lpClassID)
{
	OutputDebugString("In CPersistStorage::GetClassIDrn");
	*lpClassID = GUID_SIMPLE;
	return  S_OK ;
};
//**********************************************************************
//
// CPersistStorage::Save
//
// Purpose:
//
//      Instructs the object to save itself into the storage.
//
// Parameters:
//
//      LPSTORAGE pStgSave  - Storage in which the object should be saved
//
//      BOOL fSameAsLoad    - TRUE if pStgSave is the same as the storage
//                            that the object was originally created with.
//
// Return Value:
//
//      S_OK
//
// Function Calls:
//      Function                    Location
//
//      OutputDebugString           Windows API
//      CPersistStorage::InitNew    IPS.CPP
//      CSimpSvrObj::SaveToStorage  OBJ.CPP
//
//
// Comments:
//
//      A real app will want better error checking in this method.
//
//********************************************************************
STDMETHODIMP CPersistStorage::Save  ( LPSTORAGE pStgSave, BOOL fSameAsLoad)
{
	OutputDebugString("In CPersistStorage::Savern");
	// save the data
	m_lpObj->SaveToStorage (pStgSave, fSameAsLoad);
	m_lpObj->m_fSaveWithSameAsLoad = fSameAsLoad;
	m_lpObj->m_fNoScribbleMode = TRUE;
	return  S_OK ;
};
//**********************************************************************
//
// CPersistStorage::SaveCompleted
//
// Purpose:
//
//      Called when the container is finished saving the object
//
// Parameters:
//
//      LPSTORAGE pStgNew   - ptr to the new storage
//
// Return Value:
//
//      S_OK
//
// Function Calls:
//      Function                    Location
//
//      OutputDebugString           Windows API
//
//
// Comments:
//
//
//********************************************************************
STDMETHODIMP CPersistStorage::SaveCompleted  ( LPSTORAGE pStgNew)
{
	OutputDebugString("In CPersistStorage::SaveCompletedrn");
	if (pStgNew)
		{
		ReleaseStreamsAndStorage();
		m_lpObj->m_lpStorage = pStgNew;
		m_lpObj->m_lpStorage->AddRef();
		OpenStreams(pStgNew);
		}
	/* OLE2NOTE: it is only legal to perform a Save or SaveAs operation
	**    on an embedded object. if the document is a file-based document
	**    then we can not be changed to a IStorage-base object.
	**
	**      fSameAsLoad   lpStgNew     Type of Save     Send OnSave
	**    ---------------------------------------------------------
	**         TRUE        NULL        SAVE             YES
	**         TRUE        ! NULL      SAVE *           YES
	**         FALSE       ! NULL      SAVE AS          YES
	**         FALSE       NULL        SAVE COPY AS     NO
	**
	**    * this is a strange case that is possible. it is inefficient
	**    for the caller; it would be better to pass lpStgNew==NULL for
	**    the Save operation.
	*/
	if ( pStgNew || m_lpObj->m_fSaveWithSameAsLoad)
		{
		if (m_lpObj->m_fNoScribbleMode)
			m_lpObj->GetOleAdviseHolder()->SendOnSave();  // normally would clear a
														  // dirty bit
		m_lpObj->m_fSaveWithSameAsLoad = FALSE;
		}
	m_lpObj->m_fNoScribbleMode = FALSE;
	return  S_OK ;
};
//**********************************************************************
//
// CPersistStorage::Load
//
// Purpose:
//
//      Instructs the object to be loaded from storage.
//
// Parameters:
//
//      LPSTORAGE pStg  - Ptr to the storage in which to be loaded
//
// Return Value:
//
//      S_OK
//
// Function Calls:
//      Function                        Location
//
//      OutputDebugString               Windows API
//      CSimpSvrObj::LoadFromStorage    OBJ.CPP
//
//
// Comments:
//
//      A real app will want better error checking in this method.
//
//********************************************************************
STDMETHODIMP CPersistStorage::Load  ( LPSTORAGE pStg)
{
	OutputDebugString("In CPersistStorage::Loadrn");
	// remember the storage
	if (m_lpObj->m_lpStorage)
		{
		m_lpObj->m_lpStorage->Release();
		m_lpObj->m_lpStorage = NULL;
		}
	m_lpObj->m_lpStorage = pStg;
	m_lpObj->m_lpStorage->AddRef();
	OpenStreams(m_lpObj->m_lpStorage);
	m_lpObj->LoadFromStorage();
	return  S_OK ;
};
//**********************************************************************
//
// CPersistStorage::IsDirty
//
// Purpose:
//
//      Returns whether or not the object is dirty w/respect to its
//      Storage
//
// Parameters:
//
//      None
//
// Return Value:
//
//
// Function Calls:
//      Function                    Location
//
//      OutputDebugString           Windows API
//
//
// Comments:
//
//      This sample does not implement this function, although a
//      real application should.
//
//********************************************************************
STDMETHODIMP CPersistStorage::IsDirty()
{
	OutputDebugString("In CPersistStorage::IsDirtyrn");
	return  S_OK ;
};
//**********************************************************************
//
// CPersistStorage::HandsOffStorage
//
// Purpose:
//
//      Forces the object to release its handle to its storage.
//
// Parameters:
//
//      None
//
// Return Value:
//
//      S_OK
//
// Function Calls:
//      Function                    Location
//
//      OutputDebugString           Windows API
//      IStorage::Release           OLE
//
// Comments:
//
//
//********************************************************************
STDMETHODIMP CPersistStorage::HandsOffStorage  ()
{
	OutputDebugString("In CPersistStorage::HandsOffStoragern");
	ReleaseStreamsAndStorage();
	return  S_OK ;
};
//**********************************************************************
//
// CPersistStorage::CreateStreams
//
// Purpose:
//
//      Creates the streams that are held open for the object's lifetime.
//
// Parameters:
//
//      LPSTORAGE lpStg -   Storage in which to create the streams
//
// Return Value:
//
//      S_OK
//
// Function Calls:
//      Function                    Location
//
//      OutputDebugString           Windows API
//      IStorage::Release           OLE
//      IStream::Release            OLE
//      IStorage::CreateStream      OLE
//
// Comments:
//
//
//********************************************************************
void CPersistStorage::CreateStreams(LPSTORAGE lpStg)
{
	if (m_lpObj->m_lpColorStm)
		m_lpObj->m_lpColorStm->Release();
	if (m_lpObj->m_lpSizeStm)
		m_lpObj->m_lpSizeStm->Release();
		// create a stream to save the colors
	//@@WTK WIN32, UNICODE
	//lpStg->CreateStream ( "RGB",
	lpStg->CreateStream ( OLESTR("RGB"),
						   STGM_READWRITE | STGM_SHARE_EXCLUSIVE | STGM_CREATE,
						   0,
						   0,
						   &m_lpObj->m_lpColorStm);
	// create a stream to save the size
	//@@WTK WIN32, UNICODE
	//lpStg->CreateStream ( "size",
	lpStg->CreateStream ( OLESTR("size"),
						   STGM_READWRITE | STGM_SHARE_EXCLUSIVE | STGM_CREATE,
						   0,
						   0,
						   &m_lpObj->m_lpSizeStm);
}
//**********************************************************************
//
// CPersistStorage::OpenStreams
//
// Purpose:
//
//      Opens the streams in a storage.
//
// Parameters:
//
//      LPSTORAGE lpStg -   Storage in which to open the streams.
//
// Return Value:
//
//      S_OK
//
// Function Calls:
//      Function                    Location
//
//      OutputDebugString           Windows API
//      IStorage::Release           OLE
//
// Comments:
//
//
//********************************************************************
void CPersistStorage::OpenStreams(LPSTORAGE lpStg)
{
	if (m_lpObj->m_lpColorStm)
		m_lpObj->m_lpColorStm->Release();
	if (m_lpObj->m_lpSizeStm)
		m_lpObj->m_lpSizeStm->Release();
		// open the color stream
	//@@WTK WIN32, UNICODE
	//lpStg->OpenStream ( "RGB",
	lpStg->OpenStream ( OLESTR("RGB"),
						   0,
						   STGM_READWRITE | STGM_SHARE_EXCLUSIVE,
						   0,
						   &m_lpObj->m_lpColorStm);
	// open the color stream
	//@@WTK WIN32, UNICODE
	//lpStg->OpenStream ( "size",
	lpStg->OpenStream ( OLESTR("size"),
						   0,
						   STGM_READWRITE | STGM_SHARE_EXCLUSIVE,
						   0,
						   &m_lpObj->m_lpSizeStm);
}
//**********************************************************************
//
// CPersistStorage::ReleaseStreamsAndStorage
//
// Purpose:
//
//      Releases the stream and storage ptrs
//
// Parameters:
//
//      None
//
// Return Value:
//
//      S_OK
//
// Function Calls:
//      Function                    Location
//
//      OutputDebugString           Windows API
//      IStorage::Release           OLE
//
// Comments:
//
//
//********************************************************************
void CPersistStorage::ReleaseStreamsAndStorage()
{
	if (m_lpObj->m_lpColorStm)
		{
		m_lpObj->m_lpColorStm->Release();
		m_lpObj->m_lpColorStm = NULL;
		}
	if (m_lpObj->m_lpSizeStm)
		{
		m_lpObj->m_lpSizeStm->Release();
		m_lpObj->m_lpSizeStm = NULL;
		}
	if (m_lpObj->m_lpStorage)
		{
		m_lpObj->m_lpStorage->Release();
		m_lpObj->m_lpStorage = NULL;
		}
}
//**********************************************************************
//
// CPersistStorage::CreateStreams
//
// Purpose:
//
//      Creates temporary streams in a storage.
//
// Parameters:
//
//      LPSTORAGE lpStg                 - Pointer to the storage
//
//      LPSTREAM FAR* lplpTempColor     - Color Stream
//
//      LPSTREAM FAR* lplpTempSize      - Size Stream
//
// Return Value:
//
//      S_OK
//
// Function Calls:
//      Function                    Location
//
//      OutputDebugString           Windows API
//      IStorage::Release           OLE
//
// Comments:
//
//
//********************************************************************
void CPersistStorage::CreateStreams(LPSTORAGE lpStg, LPSTREAM FAR* lplpTempColor,LPSTREAM FAR* lplpTempSize)
{
		// create a stream to save the colors
	 //@@WTK WIN32, UNICODE
	 //lpStg->CreateStream ( "RGB",
	 lpStg->CreateStream ( OLESTR("RGB"),
						   STGM_READWRITE | STGM_SHARE_EXCLUSIVE | STGM_CREATE,
						   0,
						   0,
						   lplpTempColor);
	// create a stream to save the size
	//@@WTK WIN32, UNICODE
	//lpStg->CreateStream ( "size",
	lpStg->CreateStream ( OLESTR("size"),
						   STGM_READWRITE | STGM_SHARE_EXCLUSIVE | STGM_CREATE,
						   0,
						   0,
						   lplpTempSize);
}

						