sl@0: // Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: // Declaration for CEcomCachedDriveInfo class
sl@0: // 
sl@0: //
sl@0: 
sl@0: /**
sl@0:  @file
sl@0:  @internalComponent
sl@0: */
sl@0: 
sl@0: #ifndef DRIVEINFO_H
sl@0: #define DRIVEINFO_H
sl@0: 
sl@0: #include <e32std.h>
sl@0: #include <f32file.h>
sl@0: 
sl@0: /** A set of bit flags representing drive attributes of interest
sl@0:  to ECOM */
sl@0: enum TEComDrvAttr
sl@0: 	{
sl@0: 	// No scanning performed on 3 kinds of drives
sl@0: 	// 1. discovery disabled by licensees, 2. remote (network) drive,
sl@0: 	//    and 3. substituted drive. 
sl@0: 	EEComDrvAttrNoDiscovery		= 0x1,
sl@0: 
sl@0: 	// plug-ins on removable media needs extra validation
sl@0: 	EEComDrvAttrRemovable		= 0x2,
sl@0: 
sl@0: 	EEComDrvAttrReadOnlyInternal= 0x4,
sl@0: 
sl@0: 	// Custom resolver cache cares about this
sl@0: 	EEComDrvAttrWritable		= 0x8
sl@0: 	};
sl@0: 
sl@0: /** A struct to store the driveNumber and TEComDrvAttr of a drive. */
sl@0: struct TEComDrvFlags
sl@0: 	{
sl@0: 	TUint32 iFlags;
sl@0: 	TInt32	iDrvNumber;
sl@0: 	};
sl@0: 
sl@0: /** class to keep track of drive attributes of interest to ECOM.
sl@0:  */
sl@0: class CEComCachedDriveInfo : public CBase
sl@0: 	{
sl@0: public:
sl@0: 	static CEComCachedDriveInfo* NewL(RFs& aFs);
sl@0: 	TBool DriveIsReadOnlyInternalL(const TInt aDrive) const;
sl@0: 	TBool DriveIsRemovableL(const TInt aDrive) const;
sl@0: 	TBool DriveIsWritableL(const TInt aDrive) const;
sl@0: 
sl@0: private:
sl@0: 	CEComCachedDriveInfo();
sl@0: 	void ConstructL(RFs& aFs, TUint32 aDiscoveryDisabledMask);
sl@0: 
sl@0: private:
sl@0: 	static TFixedArray<TEComDrvFlags, KMaxDrives> iDriveAttr;
sl@0: 	static TInt  iLastIndex;
sl@0: 	static TBool iInitialized;
sl@0: 
sl@0: 	friend class TEComCachedDriveInfoIterator;	// to access private data
sl@0: 	friend class TDriveInfo_StateAccessor; // for testing
sl@0: 	};
sl@0: 
sl@0: 
sl@0: /** Iterator which return only valid drives.
sl@0: 
sl@0: After instantiation, user must call either First() or Last()
sl@0: to set the initial position and check InRange() before calling
sl@0: the methods to access the drive number and attributes.
sl@0: */
sl@0: class TEComCachedDriveInfoIterator
sl@0: 	{
sl@0: public:
sl@0: 	TEComCachedDriveInfoIterator(const CEComCachedDriveInfo& aCachedDriveInfo);
sl@0: 
sl@0: 	void First(void);
sl@0: 	void Next(void);
sl@0: 	void Last(void);
sl@0: 	void Prev(void);
sl@0: 	TBool SetPos(const TInt aDrive);
sl@0: 	TBool InRange(void) const;
sl@0: 
sl@0: 	TDriveNumber DriveNumber(void) const;
sl@0: 	TDriveUnit	DriveUnit(void) const;
sl@0: 	TBool DriveIsReadOnlyInternal(void) const;
sl@0: 	TBool DriveIsRemovable(void) const;
sl@0: 	TBool DriveIsWritable(void) const;
sl@0: 
sl@0: private:
sl@0: 	const TFixedArray<TEComDrvFlags, KMaxDrives>& iDriveAttr;
sl@0: 	TInt  iIndex;
sl@0: 	};
sl@0: 
sl@0: #endif // DRIVEINFO_H