// Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of "Eclipse Public License v1.0"

// which accompanies this distribution, and is available

// at the URL "http://www.eclipse.org/legal/epl-v10.html".

//

// Initial Contributors:

// Nokia Corporation - initial contribution.

//

// Contributors:

//

// Description:

//

#ifndef TAVSRCOPERATIONS_H

#define TAVSRCOPERATIONS_H

#include <e32def.h>

#include <e32cmn.h>

#include <e32base.h>

#include <e32keys.h>

// all key operations available for user input

static const TInt KTavsrcOpConnect = ']';

static const TInt KTavsrcOpCancel = '[';

static const TInt KTavsrcOpDiscoverSEPs = 'd';

static const TInt KTavsrcOpCreateBearers = '1';

static const TInt KTavsrcOpCloseBearers = '!';

static const TInt KTavsrcOpContentProtection = 'p';

static const TInt KTavsrcOpGetCapabilities = 'g';

static const TInt KTavsrcOpStartStreams = 's';

static const TInt KTavsrcOpSuspendStreams = 'e';

static const TInt KTavsrcOpEchoStorm = 'E';

static const TInt KTavsrcOpAbort = 'a';

static const TInt KTavsrcOpStream = '@';

static const TInt KTavsrcOpStreamFaster = '+';

static const TInt KTavsrcOpStreamSlower = '-';

static const TInt KTavsrcOpAutoStream = 'A';

static const TInt KTavsrcOpStopStream = '\'';

static const TInt KTavsrcOpRegisterSEP = 't';

static const TInt KTavsrcOpRegisterMultipleSEPs = 'T';

static const TInt KTavsrcOpStartSrc = 'o';

static const TInt KTavsrcOpStopSrc = 'c';

static const TInt KTavsrcOpDisconnectSrc = 'f';

static const TInt KTavsrcOpConfigureSEP = 'x';

static const TInt KTavsrcOpReconfigureSEP = 'x';

static const TInt KTavsrcOpPacketDropIoctl = 'i';

static const TInt KTavsrcOpVolumeUp = EKeyUpArrow;

static const TInt KTavsrcOpVolumeDown = EKeyDownArrow;

static const TInt KTavsrcOpBackwards = EKeyLeftArrow;

static const TInt KTavsrcOpForwards = EKeyRightArrow;

static const TInt KTavsrcOpPlay = '}';

static const TInt KTavsrcOpStop = '{';

static const TInt KTavsrcOpExit = EKeyEscape;

static const TInt KTavsrcOpToggleSafeMode = 'W';

// describes one operation including key to press and next possible operations

class TTavsrcOperation

	{

public:

	TTavsrcOperation(TInt aOpCode, TChar aOperation, TInt aNextOpCodes);

	static TBool OperationMatchesAndAllowed(const TTavsrcOperation& aOpA, const TTavsrcOperation& aOpB);

	TInt GetNextOpCodes() const;

private:

	// iOpCode is the internal representation of the operation and can be used in a bitmask to define

	// all possible next operations 

	TInt iOpCode;

	// iOperation is the external representation of the operation, i.e. the key pressed by the user defined

	// above

	TChar iOperation;

	// iNextOpCodes is a bitmask of all the next possible operations after this operation

	TInt iNextOpCodes;

	};

// describes all operations and is used to only allow acceptable, as defined by GAVDP, operations

// to be selected by the user. All checking of whether an operation is allowed can be disabled

// by turning off safe mode.

class CTavsrcOperations : public CBase

	{

public:

	static CTavsrcOperations* NewL();

	~CTavsrcOperations();

	TBool IsOperationAllowed(TChar aOperation);

	TInt BeginOperation(TChar aOperation);

	void EndOperation(TChar aOperation, TInt aError);

	TBool SafeMode();

	void SetSafeMode(TBool aSafeMode);

private:

	CTavsrcOperations();

	void ConstructL();

	TInt GetAllowedOperationIndex(TChar aOperation, TInt aAllowedNextOpcodes);

	TBool IsOperationAllowed(TInt aIndex);

private:

	TInt iLastOperationIndex;

	TInt iPendingOperationIndex;

	TBool iSafeMode;

	RArray<TTavsrcOperation> iOperations;

	};

#endif // TAVSRCOPERATIONS_H