// Copyright (c) 2002-2009 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 __LOGVIEWWINDOWFETCHER_H__

#define __LOGVIEWWINDOWFETCHER_H__

// System includes

#include <e32base.h>

// User includes

#include <logwrap.h>

#include "LogCliServShared.h"

#include <logviewchangeobserver.h>

// Classes referenced

class RLogSession;

/////////////////////////////////////////////////////////////////////////////////////////

// -----> MLogViewWindowFetcherObserver (header)

/////////////////////////////////////////////////////////////////////////////////////////

class MLogViewWindowFetcherObserver

/**

@internalComponent

*/

	{

public:

	virtual void HandleFetchedWindowItemL(TInt aItemIndex, CLogEvent* aEvent) = 0;

	};

/////////////////////////////////////////////////////////////////////////////////////////

// -----> CLogViewWindowFetcher (header)

/////////////////////////////////////////////////////////////////////////////////////////

NONSHARABLE_CLASS(CLogViewWindowFetcher) : public CActive

/**

@internalComponent

*/

	{

public:

	CLogViewWindowFetcher(RLogSession& aSession, TLogViewId aViewId, MLogViewWindowFetcherObserver& aObserver, TInt aPriority);

	~CLogViewWindowFetcher();

	void ConstructL();

public:

	/**

	 * Fetch the specified window.

	 */

	void PrepareToFetchWindowL(const TLogWindowAndCursor& aRequestedWindow);

	/**

	 * Start the asynchronous fetch

	 */

	void Start(TRequestStatus& aObserver);

	/**

	 * Cancel any fetch operation but without notifying the observer

	 */

	void SilentCancel();

	/**

	 * Access the window & cursor for the requested window

	 */

	inline const TLogWindowAndCursor& RequestedWindow() const;

private:

	void Fetch(const TLogWindow& aWindow);

	void CompleteObserver(TInt aError);

private: // FROM CActive

	void RunL();

	void DoCancel();

	TInt RunError(TInt aError);

private:

	RLogSession& iSession;

	const TLogViewId iViewId;

	MLogViewWindowFetcherObserver& iObserver;

private:

	TLogWindowAndCursor iRequestedWindow;

	//

	TRequestStatus* iObserverRequestStatus;

	CBufBase* iBuffer;

	TPtr8 iBufferPointer;

	TPckgBuf<TLogTransferWindow> iFetchWindowData;

	TPckgBuf<TLogClientServerData> iData;

	TLogWindowAndCursor iWindowReq;

	};

/////////////////////////////////////////////////////////////////////////////////////////

// -----> CLogViewWindowFetcher (inline)

/////////////////////////////////////////////////////////////////////////////////////////

inline const TLogWindowAndCursor& CLogViewWindowFetcher::RequestedWindow() const

	{

	return iRequestedWindow;

	}

#endif