183 lines
4.6 KiB
C++
183 lines
4.6 KiB
C++
//+-------------------------------------------------------------------------
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//
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// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
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// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
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// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
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// PARTICULAR PURPOSE.
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//
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// Copyright (c) 1998-1999 Microsoft Corporation. All Rights Reserved.
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//
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// File: smpfilt.hxx
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//
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// Contents: Sample filter declarations
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//
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// Platform: Windows 2000
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//
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//--------------------------------------------------------------------------
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#pragma once
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//+-------------------------------------------------------------------------
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//
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// Global definitions
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//
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//--------------------------------------------------------------------------
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const ULONG TEXT_FILTER_CHUNK_SIZE = 10000L; // size of character buffers
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long g_lInstances = 0; // Global count of CSmpFilt and CSmpFiltCF instances
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GUID const guidStorage = PSGUID_STORAGE; // GUID for storage property set
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//C-------------------------------------------------------------------------
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//
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// Class: CSmpFilter
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//
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// Purpose: Implements interfaces of sample filter
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//
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//--------------------------------------------------------------------------
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// SmpFilter Class ID
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// {8B0E5E70-3C30-11d1-8C0D-00AA00C26CD4}
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GUID const CLSID_CSmpFilter =
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{
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0x8b0e5e70,
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0x3c30,
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0x11d1,
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{ 0x8c, 0xd, 0x0, 0xaa, 0x0, 0xc2, 0x6c, 0xd4 }
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};
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class CSmpFilter : public IFilter, public IPersistFile
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{
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public:
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//
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// From IUnknown
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//
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virtual SCODE STDMETHODCALLTYPE QueryInterface(
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REFIID riid,
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void ** ppvObject
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);
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virtual ULONG STDMETHODCALLTYPE AddRef();
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virtual ULONG STDMETHODCALLTYPE Release();
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//
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// From IFilter
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//
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virtual SCODE STDMETHODCALLTYPE Init(
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ULONG grfFlags,
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ULONG cAttributes,
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FULLPROPSPEC const * aAttributes,
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ULONG * pFlags
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);
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virtual SCODE STDMETHODCALLTYPE GetChunk(
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STAT_CHUNK * pStat
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);
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virtual SCODE STDMETHODCALLTYPE GetText(
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ULONG * pcwcBuffer,
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WCHAR * awcBuffer
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);
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virtual SCODE STDMETHODCALLTYPE GetValue(
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PROPVARIANT ** ppPropValue
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);
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virtual SCODE STDMETHODCALLTYPE BindRegion(
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FILTERREGION origPos,
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REFIID riid,
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void ** ppunk
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);
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//
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// From IPersistFile
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//
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virtual SCODE STDMETHODCALLTYPE GetClassID(
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CLSID * pClassID
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);
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virtual SCODE STDMETHODCALLTYPE IsDirty();
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virtual SCODE STDMETHODCALLTYPE Load(
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LPCWSTR pszFileName,
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DWORD dwMode
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);
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virtual SCODE STDMETHODCALLTYPE Save(
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LPCWSTR pszFileName,
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BOOL fRemember
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);
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virtual SCODE STDMETHODCALLTYPE SaveCompleted(
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LPCWSTR pszFileName
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);
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virtual SCODE STDMETHODCALLTYPE GetCurFile(
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LPWSTR * ppszFileName
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);
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private:
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friend class CSmpFilterCF;
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CSmpFilter();
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~CSmpFilter();
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HANDLE m_hFile; // Handle to the input file
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long m_lRefs; // Reference count
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WCHAR * m_pwszFileName; // Name of input file to filter
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ULONG m_ulBufferLen; // Characters read from file to buffer
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ULONG m_ulCharsRead; // Characters read from chunk buffer
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ULONG m_ulChunkID; // Current chunk id
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ULONG m_ulCodePage; // Current default codepage
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BOOL m_fContents; // TRUE if contents requested
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BOOL m_fEof; // TRUE if end of file reached
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WCHAR m_wcsBuffer[TEXT_FILTER_CHUNK_SIZE]; // Buffer for UNICODE
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};
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//C-------------------------------------------------------------------------
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//
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// Class: CSmpFilterCF
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//
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// Purpose: Implements class factory for sample filter
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//
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//--------------------------------------------------------------------------
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class CSmpFilterCF : public IClassFactory
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{
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public:
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//
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// From IUnknown
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//
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virtual SCODE STDMETHODCALLTYPE QueryInterface(
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REFIID riid,
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void ** ppvObject
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);
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virtual ULONG STDMETHODCALLTYPE AddRef();
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virtual ULONG STDMETHODCALLTYPE Release();
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//
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// From IClassFactory
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//
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virtual SCODE STDMETHODCALLTYPE CreateInstance(
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IUnknown * pUnkOuter,
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REFIID riid, void ** ppvObject
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);
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virtual SCODE STDMETHODCALLTYPE LockServer(
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BOOL fLock
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);
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private:
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friend SCODE STDMETHODCALLTYPE DllGetClassObject(
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REFCLSID cid,
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REFIID iid,
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void ** ppvObj
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);
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CSmpFilterCF();
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~CSmpFilterCF();
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long m_lRefs; // Reference count
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};
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