shared source/wpf/src/host/shimimpl/persisthistory.hxx

   1 //+-----------------------------------------------------------------------
   2 //
   3 //  Copyright (c) Microsoft Corporation.  All rights reserved.
   4 //
   5 //  Description:
   6 //     Defines the PersistHistory class of PresentationHost.
   7 //
   8 //  History:
   9 //     2002/06/19-murrayw
  10 //          Created
  11 //     2007/09/20-[....]
  12 //          Ported Windows->DevDiv. See SourcesHistory.txt.
  13 //
  14 //------------------------------------------------------------------------
  15
  16 #pragma once
  17
  18 //******************************************************************************
  19 //
  20 // CPersistHistory class definition
  21 //
  22 //******************************************************************************
  23
  24 class CPersistHistory : IPersistHistory
  25 {
  26 friend class CHtmlWindow;
  27
  28 private:
  29     CHostShim      *m_pHostShim;
  30 public:
  31     CPersistHistory::CPersistHistory(__in CHostShim *);
  32     CPersistHistory::~CPersistHistory();
  33
  34     // IUnknown Methods
  35     STDMETHODIMP QueryInterface(REFIID, __out LPVOID*);
  36     STDMETHODIMP_(ULONG)AddRef();
  37     STDMETHODIMP_(ULONG)Release();
  38
  39     // IPersist Methods
  40     STDMETHODIMP GetClassID(LPCLSID);
  41
  42     // IPersistHistory Methods
  43     STDMETHODIMP LoadHistory(__in IStream *pStream, IBindCtx *pbc);
  44     STDMETHODIMP SaveHistory(__in IStream *pStream);
  45     STDMETHODIMP SetPositionCookie(DWORD dwPositioncookie);
  46     STDMETHODIMP GetPositionCookie(__out DWORD *pdwPositioncookie);
  47
  48 private:
  49     STDMETHODIMP WriteToStream(IStream* pOutputStream, DWORD dwData);
  50     STDMETHODIMP ReadFromStream(IStream* pInputStream, DWORD* pdwData);
  51
  52 };