145 lines
5.5 KiB
C++
145 lines
5.5 KiB
C++
//---------------------------------------------------------------------------
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// CursorMain.h : CVDCursorMain header file
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//
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// Copyright (c) 1996 Microsoft Corporation, All Rights Reserved
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// Developed by Sheridan Software Systems, Inc.
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//---------------------------------------------------------------------------
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#ifndef __CVDCURSORMAIN__
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#define __CVDCURSORMAIN__
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class CVDBookmark;
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class CVDCursorPosition;
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class CVDCursorMain : public CVDRowsetSource
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{
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protected:
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// Construction/Destruction
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CVDCursorMain(LCID lcid);
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virtual ~CVDCursorMain();
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protected:
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static HRESULT Create(IRowPosition * pRowPosition, IRowset * pRowset, ICursor ** ppCursor, LCID lcid);
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public:
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static HRESULT Create(IRowset * pRowset, ICursor ** ppCursor, LCID lcid);
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static HRESULT Create(IRowPosition * pRowPosition, ICursor ** ppCursor, LCID lcid);
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protected:
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// Rowset columns
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HRESULT CreateMetaColumns();
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void InitOptionalMetadata(ULONG cColumns);
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void DestroyMetaColumns();
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HRESULT CreateColumns();
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void DestroyColumns();
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public:
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// Access functions
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ULONG GetMetaColumnsCount() const {return s_ulMetaColumns;}
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CVDRowsetColumn * InternalGetMetaColumns() const {return s_rgMetaColumns;}
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ULONG GetColumnsCount() const {return m_ulColumns;}
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CVDRowsetColumn * InternalGetColumns() const {return m_rgColumns;}
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HACCESSOR GetBookmarkAccessor() const {return m_hAccessorBM;}
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ULONG GetMaxBookmarkLen() const {return m_cbMaxBookmark;}
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BOOL IsColumnsRowsetSupported() const {return m_fColumnsRowsetSupported;}
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void SetInternalInsertRow(BOOL fInternalInsertRow) {m_fInternalInsertRow = fInternalInsertRow;}
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void SetInternalDeleteRows(BOOL fInternalDeleteRows) {m_fInternalDeleteRows = fInternalDeleteRows;}
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void SetInternalSetData(BOOL fInternalSetData) {m_fInternalSetData = fInternalSetData;}
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BOOL IsSameRowAsNew(HROW hrow);
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ULONG AddedRows(void);
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protected:
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// Rowset columns
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static DWORD s_dwMetaRefCount; // reference count for meta-columns
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static ULONG s_ulMetaColumns; // number of meta-columns for IColumnsInfo
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static CVDRowsetColumn * s_rgMetaColumns; // pointer to an array of meta-column objects
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ULONG m_ulColumns; // number of rowset columns
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CVDRowsetColumn * m_rgColumns; // pointer to an array of column objects
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// IRowsetNotify
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VARIANT_BOOL m_fConnected; // have we added ourselves to the Rowset's connection point
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DWORD m_dwAdviseCookie; // connection point identifier
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HRESULT ConnectIRowsetNotify();
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void DisconnectIRowsetNotify();
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void Passivate();
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// Other
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ULONG m_cbMaxBookmark; // sizeof maximum bookmark
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HACCESSOR m_hAccessorBM; // hAccessor for the bookmark column
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CVDResourceDLL m_resourceDLL; // keeps track of resource DLL
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// booleans
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WORD m_fWeAddedMetaRef : 1; // we added a reference count to meta-columns
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WORD m_fPassivated : 1; // external ref count went to zero
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WORD m_fColumnsRowsetSupported : 1; // does rowset expose IColumnsRowset
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WORD m_fInternalInsertRow : 1; // row insert caused by internal call
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WORD m_fInternalDeleteRows : 1; // row delete caused by internal call
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WORD m_fInternalSetData : 1; // set column caused by internal call
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// rowset properties
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WORD m_fLiteralBookmarks : 1;
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WORD m_fOrderedBookmarks : 1;
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WORD m_fBookmarkSkipped : 1;
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public:
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//=--------------------------------------------------------------------------=
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// IUnknown methods
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//
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STDMETHOD(QueryInterface)(REFIID riid, void **ppvObjOut);
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STDMETHOD_(ULONG, AddRef)(void);
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STDMETHOD_(ULONG, Release)(void);
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//=--------------------------------------------------------------------------=
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// IRowsetNotify methods passed up from CVDRowsetNotify implementation
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//
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STDMETHOD(OnFieldChange)(IRowset *pRowset, HROW hRow, ULONG cColumns, ULONG rgColumns[], DBREASON eReason,
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DBEVENTPHASE ePhase, BOOL fCantDeny);
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STDMETHOD(OnRowChange)(IRowset *pRowset, ULONG cRows, const HROW rghRows[], DBREASON eReason, DBEVENTPHASE ePhase,
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BOOL fCantDeny);
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STDMETHOD(OnRowsetChange)(IRowset *pRowset, DBREASON eReason, DBEVENTPHASE ePhase, BOOL fCantDeny);
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private:
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// the inner, private unknown implementation to give to connection point
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// container to avoid circular ref count
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//
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class CVDRowsetNotify : public IRowsetNotify {
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public:
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STDMETHOD(QueryInterface)(REFIID riid, void **ppvObjOut);
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STDMETHOD_(ULONG, AddRef)(void);
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STDMETHOD_(ULONG, Release)(void);
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// constructor is remarkably trivial
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//
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CVDRowsetNotify() : m_cRef(0) {}
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ULONG GetRefCount() const {return m_cRef;}
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private:
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CVDCursorMain *m_pMainUnknown();
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ULONG m_cRef;
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//=--------------------------------------------------------------------------=
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// IRowsetNotify methods
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//
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STDMETHOD(OnFieldChange)(IRowset *pRowset, HROW hRow, ULONG cColumns, ULONG rgColumns[], DBREASON eReason,
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DBEVENTPHASE ePhase, BOOL fCantDeny);
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STDMETHOD(OnRowChange)(IRowset *pRowset, ULONG cRows, const HROW rghRows[], DBREASON eReason, DBEVENTPHASE ePhase,
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BOOL fCantDeny);
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STDMETHOD(OnRowsetChange)(IRowset *pRowset, DBREASON eReason, DBEVENTPHASE ePhase, BOOL fCantDeny);
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} m_RowsetNotify;
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friend class CVDRowsetNotify;
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};
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#endif //__CVDCURSORMAIN__
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