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651 lines
16 KiB
651 lines
16 KiB
//**********************************************************************
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// File name: ips.cpp
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//
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// Implementation file for the CSimpSvrApp Class
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//
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// Functions:
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//
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// See ips.h for a list of member functions.
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//
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// Copyright (c) 1993 Microsoft Corporation. All rights reserved.
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//**********************************************************************
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#include "pre.h"
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#include "obj.h"
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#include "ips.h"
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#include "app.h"
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#include "doc.h"
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#include <storage.h>
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#ifdef WIN32
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DEFINE_GUID(GUID_SIMPLE, 0xBCF6D4A0, 0xBE8C, 0x1068, 0xB6, 0xD4, 0x00, 0xDD, 0x01, 0x0C, 0x05, 0x09);
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#else
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DEFINE_GUID(GUID_SIMPLE, 0x9fb878d0, 0x6f88, 0x101b, 0xbc, 0x65, 0x00, 0x00, 0x0b, 0x65, 0xc7, 0xa6);
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#endif
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//**********************************************************************
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//
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// CPersistStorage::QueryInterface
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//
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// Purpose:
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//
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//
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// Parameters:
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//
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// REFIID riid - Interface being queried for.
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//
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// LPVOID FAR *ppvObj - Out pointer for the interface.
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//
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// Return Value:
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//
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// S_OK - Success
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// E_NOINTERFACE - Failure
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//
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// Function Calls:
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// Function Location
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//
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// CSimpSvrObj::QueryInterface OBJ.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 CPersistStorage::QueryInterface ( REFIID riid, LPVOID FAR* ppvObj)
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{
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TestDebugOut("In CPersistStorage::QueryInterface\r\n");
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// need to NULL the out parameter
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return m_lpObj->QueryInterface(riid, ppvObj);
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};
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//**********************************************************************
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//
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// CPersistStorage::AddRef
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//
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// Purpose:
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//
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// Increments the reference count on CPersistStorage and the "object"
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// 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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// The Reference count on 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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// OuputDebugString Windows API
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// CSimpSvrObj::AddRef OBJ.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_(ULONG) CPersistStorage::AddRef ()
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{
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TestDebugOut("In CPersistStorage::AddRef\r\n");
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++m_nCount;
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return m_lpObj->AddRef();
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};
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//**********************************************************************
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//
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// CPersistStorage::Release
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//
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// Purpose:
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//
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// Decrements the reference count of CPersistStorage and the
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// "object" 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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// The new reference count
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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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// CSimpSvrObj::Release OBJ.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_(ULONG) CPersistStorage::Release ()
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{
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TestDebugOut("In CPersistStorage::Release\r\n");
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--m_nCount;
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return m_lpObj->Release();
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};
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//**********************************************************************
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//
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// CPersistStorage::InitNew
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//
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// Purpose:
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//
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// Used to give a new OLE object a ptr to its storage.
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//
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// Parameters:
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//
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// LPSTORAGE pStg - Pointer to the storage
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//
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// Return Value:
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//
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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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// IStorage::Release OLE
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// IStorage::AddRef OLE
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//
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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 CPersistStorage::InitNew (LPSTORAGE pStg)
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{
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TestDebugOut("In CPersistStorage::InitNew\r\n");
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// release any streams and storages that may be open
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ReleaseStreamsAndStorage();
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m_lpObj->m_lpStorage = pStg;
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// AddRef the new Storage
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if (m_lpObj->m_lpStorage)
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m_lpObj->m_lpStorage->AddRef();
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CreateStreams(m_lpObj->m_lpStorage);
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return ResultFromScode(S_OK);
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}
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//**********************************************************************
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//
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// CPersistStorage::GetClassID
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//
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// Purpose:
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//
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// Returns the CLSID of this object.
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//
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// Parameters:
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//
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// LPCLSID lpClassID - Out ptr in which to return the CLSID
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//
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// Return Value:
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//
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// S_OK
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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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//
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// Comments:
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//
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//
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//********************************************************************
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STDMETHODIMP CPersistStorage::GetClassID ( LPCLSID lpClassID)
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{
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TestDebugOut("In CPersistStorage::GetClassID\r\n");
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*lpClassID = GUID_SIMPLE;
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return ResultFromScode( S_OK );
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};
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//**********************************************************************
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//
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// CPersistStorage::Save
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//
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// Purpose:
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//
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// Instructs the object to save itself into the storage.
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//
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// Parameters:
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//
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// LPSTORAGE pStgSave - Storage in which the object should be saved
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//
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// BOOL fSameAsLoad - TRUE if pStgSave is the same as the storage
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// that the object was originally created with.
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//
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// Return Value:
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//
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// S_OK
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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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// CPersistStorage::InitNew IPS.CPP
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// CSimpSvrObj::SaveToStorage OBJ.CPP
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//
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//
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// Comments:
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//
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// A real app will want better error checking in this method.
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//
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//********************************************************************
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STDMETHODIMP CPersistStorage::Save ( LPSTORAGE pStgSave, BOOL fSameAsLoad)
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{
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TestDebugOut("In CPersistStorage::Save\r\n");
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// save the data
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m_lpObj->SaveToStorage (pStgSave, fSameAsLoad);
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m_lpObj->m_fSaveWithSameAsLoad = fSameAsLoad;
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m_lpObj->m_fNoScribbleMode = TRUE;
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return ResultFromScode( S_OK );
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};
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//**********************************************************************
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//
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// CPersistStorage::SaveCompleted
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//
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// Purpose:
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//
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// Called when the container is finished saving the object
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//
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// Parameters:
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//
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// LPSTORAGE pStgNew - ptr to the new storage
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//
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// Return Value:
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//
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// S_OK
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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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//
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// Comments:
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//
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//
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//********************************************************************
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STDMETHODIMP CPersistStorage::SaveCompleted ( LPSTORAGE pStgNew)
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{
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TestDebugOut("In CPersistStorage::SaveCompleted\r\n");
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if (pStgNew)
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{
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ReleaseStreamsAndStorage();
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m_lpObj->m_lpStorage = pStgNew;
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m_lpObj->m_lpStorage->AddRef();
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OpenStreams(pStgNew);
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}
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/* OLE2NOTE: it is only legal to perform a Save or SaveAs operation
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** on an embedded object. if the document is a file-based document
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** then we can not be changed to a IStorage-base object.
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**
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** fSameAsLoad lpStgNew Type of Save Send OnSave
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** ---------------------------------------------------------
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** TRUE NULL SAVE YES
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** TRUE ! NULL SAVE * YES
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** FALSE ! NULL SAVE AS YES
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** FALSE NULL SAVE COPY AS NO
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**
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** * this is a strange case that is possible. it is inefficient
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** for the caller; it would be better to pass lpStgNew==NULL for
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** the Save operation.
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*/
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if ( pStgNew || m_lpObj->m_fSaveWithSameAsLoad)
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{
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if (m_lpObj->m_fNoScribbleMode)
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m_lpObj->GetOleAdviseHolder()->SendOnSave(); // normally would clear a
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// dirty bit
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m_lpObj->m_fSaveWithSameAsLoad = FALSE;
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}
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m_lpObj->m_fNoScribbleMode = FALSE;
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return ResultFromScode( S_OK );
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};
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//**********************************************************************
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//
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// CPersistStorage::Load
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//
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// Purpose:
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//
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// Instructs the object to be loaded from storage.
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//
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// Parameters:
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//
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// LPSTORAGE pStg - Ptr to the storage in which to be loaded
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//
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// Return Value:
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//
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// S_OK
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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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// CSimpSvrObj::LoadFromStorage OBJ.CPP
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//
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//
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// Comments:
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//
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// A real app will want better error checking in this method.
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//
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//********************************************************************
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STDMETHODIMP CPersistStorage::Load ( LPSTORAGE pStg)
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{
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TestDebugOut("In CPersistStorage::Load\r\n");
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// remember the storage
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if (m_lpObj->m_lpStorage)
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{
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m_lpObj->m_lpStorage->Release();
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m_lpObj->m_lpStorage = NULL;
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}
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m_lpObj->m_lpStorage = pStg;
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m_lpObj->m_lpStorage->AddRef();
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OpenStreams(m_lpObj->m_lpStorage);
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m_lpObj->LoadFromStorage();
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return ResultFromScode( S_OK );
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};
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//**********************************************************************
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//
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// CPersistStorage::IsDirty
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//
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// Purpose:
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//
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// Returns whether or not the object is dirty w/respect to its
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// Storage
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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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//
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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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//
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// Comments:
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//
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// This sample does not implement this function, although a
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// real application should.
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//
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//********************************************************************
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STDMETHODIMP CPersistStorage::IsDirty()
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{
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TestDebugOut("In CPersistStorage::IsDirty\r\n");
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return ResultFromScode( S_OK );
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};
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//**********************************************************************
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//
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// CPersistStorage::HandsOffStorage
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//
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// Purpose:
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//
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// Forces the object to release its handle to its storage.
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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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// S_OK
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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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// IStorage::Release OLE
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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 CPersistStorage::HandsOffStorage ()
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{
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TestDebugOut("In CPersistStorage::HandsOffStorage\r\n");
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ReleaseStreamsAndStorage();
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return ResultFromScode( S_OK );
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};
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//**********************************************************************
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//
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// CPersistStorage::CreateStreams
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//
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// Purpose:
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//
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// Creates the streams that are held open for the object's lifetime.
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//
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// Parameters:
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//
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// LPSTORAGE lpStg - Storage in which to create the streams
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//
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// Return Value:
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//
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// S_OK
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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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// IStorage::Release OLE
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// IStream::Release OLE
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// IStorage::CreateStream OLE
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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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void CPersistStorage::CreateStreams(LPSTORAGE lpStg)
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{
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if (m_lpObj->m_lpColorStm)
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m_lpObj->m_lpColorStm->Release();
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if (m_lpObj->m_lpSizeStm)
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m_lpObj->m_lpSizeStm->Release();
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// create a stream to save the colors
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lpStg->CreateStream ( "RGB",
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STGM_READWRITE | STGM_SHARE_EXCLUSIVE | STGM_CREATE,
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0,
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0,
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&m_lpObj->m_lpColorStm);
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// create a stream to save the size
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lpStg->CreateStream ( "size",
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STGM_READWRITE | STGM_SHARE_EXCLUSIVE | STGM_CREATE,
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0,
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0,
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&m_lpObj->m_lpSizeStm);
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}
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//**********************************************************************
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//
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// CPersistStorage::OpenStreams
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//
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// Purpose:
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//
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// Opens the streams in a storage.
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//
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// Parameters:
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//
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// LPSTORAGE lpStg - Storage in which to open the streams.
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//
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// Return Value:
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//
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// S_OK
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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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// IStorage::Release OLE
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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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void CPersistStorage::OpenStreams(LPSTORAGE lpStg)
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{
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if (m_lpObj->m_lpColorStm)
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m_lpObj->m_lpColorStm->Release();
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if (m_lpObj->m_lpSizeStm)
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m_lpObj->m_lpSizeStm->Release();
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// open the color stream
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lpStg->OpenStream ( "RGB",
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0,
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STGM_READWRITE | STGM_SHARE_EXCLUSIVE,
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0,
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&m_lpObj->m_lpColorStm);
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// open the color stream
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lpStg->OpenStream ( "size",
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0,
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STGM_READWRITE | STGM_SHARE_EXCLUSIVE,
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0,
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&m_lpObj->m_lpSizeStm);
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}
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//**********************************************************************
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//
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// CPersistStorage::ReleaseStreamsAndStorage
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//
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// Purpose:
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//
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// Releases the stream and storage ptrs
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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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// S_OK
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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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// IStorage::Release OLE
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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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void CPersistStorage::ReleaseStreamsAndStorage()
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{
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if (m_lpObj->m_lpColorStm)
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{
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m_lpObj->m_lpColorStm->Release();
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m_lpObj->m_lpColorStm = NULL;
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}
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if (m_lpObj->m_lpSizeStm)
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{
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m_lpObj->m_lpSizeStm->Release();
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m_lpObj->m_lpSizeStm = NULL;
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}
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if (m_lpObj->m_lpStorage)
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{
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m_lpObj->m_lpStorage->Release();
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m_lpObj->m_lpStorage = NULL;
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}
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}
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//**********************************************************************
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//
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// CPersistStorage::CreateStreams
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//
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// Purpose:
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//
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// Creates temporary streams in a storage.
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//
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// Parameters:
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//
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// LPSTORAGE lpStg - Pointer to the storage
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//
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// LPSTREAM FAR* lplpTempColor - Color Stream
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//
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// LPSTREAM FAR* lplpTempSize - Size Stream
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//
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// Return Value:
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//
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// S_OK
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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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|
// IStorage::Release OLE
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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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void CPersistStorage::CreateStreams(LPSTORAGE lpStg, LPSTREAM FAR* lplpTempColor,LPSTREAM FAR* lplpTempSize)
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{
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// create a stream to save the colors
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lpStg->CreateStream ( "RGB",
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STGM_READWRITE | STGM_SHARE_EXCLUSIVE | STGM_CREATE,
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0,
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0,
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lplpTempColor);
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// create a stream to save the size
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lpStg->CreateStream ( "size",
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STGM_READWRITE | STGM_SHARE_EXCLUSIVE | STGM_CREATE,
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0,
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0,
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lplpTempSize);
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}
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