129 lines
3.4 KiB
C++
129 lines
3.4 KiB
C++
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//+------------------------------------------------------------------
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//
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// Copyright (C) Microsoft Corporation, 1991 - 1997
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//
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// File: gencur.hxx
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//
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// Contents: Base cursor
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//
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// Classes: CGenericCursor
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//
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// History: 19-Aug-91 KyleP Created
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//
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//-------------------------------------------------------------------
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#pragma once
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#include <objcur.hxx>
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#include <xpr.hxx>
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#include <fa.hxx>
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#include <ciintf.h>
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//+---------------------------------------------------------------------------
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//
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// Class: CGenericCursor
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//
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// Purpose: Maps the object and property tables into one.
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//
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// History: 19-Aug-91 KyleP Created.
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// 03-May-94 KyleP Notification
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//
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//----------------------------------------------------------------------------
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class CGenericCursor : public CRetriever
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{
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public:
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CGenericCursor( XXpr & xxpr,
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ACCESS_MASK accessMask,
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BOOL& fAbort );
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virtual ~CGenericCursor();
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//
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// Control
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//
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virtual void Quiesce();
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WORKID SetWorkId(WORKID wid);
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//
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// Iteration
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//
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inline WORKID WorkId();
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WORKID NextWorkId();
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virtual void RatioFinished (ULONG& denom, ULONG& num);
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//
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// Property retrieval
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//
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virtual GetValueResult GetPropertyValue( PROPID pid,
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PROPVARIANT * pbData,
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ULONG * pcb );
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virtual void SwapOutWorker()
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{
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//
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// Override if anything needs to be done at the time of worker
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// thread swap out
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//
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Quiesce();
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}
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protected:
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virtual WORKID NextObject() = 0;
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void SetFirstWorkId( WORKID wid );
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virtual LONG Rank() = 0;
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virtual ULONG HitCount() = 0;
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virtual CCursor * GetCursor() { return 0; }
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BOOL IsAccessPermitted ( WORKID wid ); // Security check
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BOOL IsMatch( WORKID wid ); // Full match check, incl. security
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BOOL InScope( WORKID wid );
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BOOL& _fAbort; // To abort long-running methods.
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XInterface<ICiCPropRetriever> _xPropRetriever; // Client specific property retriever
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private:
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inline void PrimeWidForPropRetrieval( WORKID wid );
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void SetupWidForPropRetrieval( WORKID wid );
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WORKID _widCurrent; // Wid on which we are currently positioned
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XXpr _xxpr; // Restriction (expression)
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ACCESS_MASK _am;
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WORKID _widPrimedForPropRetrieval; // Set to the wid for which BeginPropRetreival has been
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// called. After EndPropRetrieval has been called, this
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// is reset to widInvalid.
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# ifdef CIEXTMODE
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void CiExtDump(void *ciExtSelf) const;
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# endif
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};
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//+---------------------------------------------------------------------------
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//
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// Member: CGenericCursor::WorkID, public
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//
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// Returns: The WorkID of the object under the cursor. widInvalid if
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// no object is under the cursor.
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//
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// History: 31-Oct-91 KyleP Created.
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//
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//----------------------------------------------------------------------------
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inline WORKID CGenericCursor::WorkId()
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{
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return( _widCurrent );
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}
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DECLARE_SMARTP( GenericCursor );
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