Windows编程

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Visual C++

HTMLELEM.HXX：源码内容

							//+-------------------------------------------------------------------------
//
//  Copyright 1992 - 1997 Microsoft Corporation
//
//  File:       htmlelem.hxx
//
//  Contents:   Html Element classes
//
//--------------------------------------------------------------------------
#if !defined( __HTMLELEM_HXX__ )
#define __HTMLELEM_HXX__
#include <htmlfilt.hxx>
#include <serstrm.hxx>
const TEMP_BUFFER_SIZE = 50;               // Size of temporary GetText buffer
const MAX_PROPSPEC_STRING_LENGTH = 128;    // Size of propspec string for meta and script tags
//+-------------------------------------------------------------------------
//
//  Class:      CHtmlElement
//
//  Purpose:    Abstracts the parsing algorithms for different Html tags
//
//--------------------------------------------------------------------------
class CHtmlElement
{
public:
    CHtmlElement( CHtmlIFilter& htmlIFilter, CSerialStream& serialStream );
    virtual          ~CHtmlElement()            {}
    virtual SCODE    GetChunk( STAT_CHUNK *pStat ) = 0;
    virtual SCODE    GetText( ULONG *pcwcOutput, WCHAR *awcBuffer ) = 0;
    virtual SCODE    GetValue( VARIANT ** ppPropValue );
    virtual void     InitStatChunk( STAT_CHUNK *pStat ) = 0;
    virtual void     InitFilterRegion( ULONG& idChunkSource,
                                       ULONG& cwcStartSource,
                                       ULONG& cwcLenSource );
protected:
    SCODE            SwitchToNextHtmlElement( STAT_CHUNK *pStat );
    SCODE            SkipRemainingTextAndGotoNextChunk( STAT_CHUNK *pStat );
    CHtmlIFilter &        _htmlIFilter;         // Reference to Html IFilter
    CSerialStream &       _serialStream;        // Reference to input stream
    CHtmlScanner          _scanner;             // Scanner
    WCHAR                 _aTempBuffer[TEMP_BUFFER_SIZE];  // Temporary GetText buffer
};
#endif // __HTMLELEM_HXX__

						