// 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 __LOGVIEWWINDOW_H__

#define __LOGVIEWWINDOW_H__

// System includes

#include <e32base.h>

// User includes

#include <logwrap.h>

#include "LogServShared.h"

#include "LogViewWindowFetcher.h"

#include "LogViewWindowLockObserver.h"

#include "LogViewChangeObserverInternal.h"

// Classes referenced

class CLogClient;

class CLogPackage;

class CLogChangeDefinition;

class CLogFilterList;

class MLogViewChangeObserver;

class CLogViewSetupClientOp;

class CLogViewWindowFetcher;

class CLogViewWindowLockObserver;

class CLogViewWindowChangeObserver;

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

// -----> CLogViewWindow (header)

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

NONSHARABLE_CLASS(CLogViewWindow) : public CLogActive, public MLogViewChangeObserverInternal, public MLogViewWindowFetcherObserver, public MLogViewWindowLockObserver

/**

@internalComponent

*/

	{

public:

	CLogViewWindow(RLogSession& aSession, TLogViewId aViewId, TInt aWindowSize, MLogViewChangeObserver* aCascadeObserver, TInt aPriority);

	~CLogViewWindow();

	void ConstructL(CLogPackage& aPackage);

public:

	/**

	 * Prepare the view

	 */

	TInt Setup(const CLogFilterList& aFilterList, TInt aParam, TLogFilterConstructionType aFilterConstructionType);

	/**

	 * Move the view position

	 */

	TBool NavigateL(TLogNavigation aNavigate, TRequestStatus& aStatus);

	/**

	 * Remove the specified log event from the window if its present

	 */

	void RemoveFromWindowIfPresentL(TLogId aId);

	/**

	 * Access the change observer (needed to construct the view)

	 */

	MLogViewChangeObserverInternal& ChangeObserver();

	/**

	 * Access the event at the current position

	 */

	const CLogEvent& CurrsorEvent() const;

	/** gets iViewRecordCount */

	inline TInt ViewRecordCount() const;

private: // FROM MLogViewWindowLockObserver

	void HandleWindowLockStatusChangeL(TLogViewLockStatus aStatus);

private: // FROM MLogViewWindowFetcherObserver

	void HandleFetchedWindowItemL(TInt aItemIndex, CLogEvent* aEvent);

public: // FROM MLogViewChangeObserver

	void HandleLogViewChangeEventAddedL(TLogId aId,   TInt aViewIndex, TInt aChangeIndex, TInt aTotalChangeCount);

	void HandleLogViewChangeEventChangedL(TLogId aId, TInt aViewIndex, TInt aChangeIndex, TInt aTotalChangeCount);

	void HandleLogViewChangeEventDeletedL(TLogId aId, TInt aViewIndex, TInt aChangeIndex, TInt aTotalChangeCount);

private: // FROM MLogViewChangeObserverInternal

	void HandleLogViewChangeEventLogClearedL();

private: // FROM CLogActive

	void DoRunL();

	void DoCancel();

	void DoComplete(TInt& aComplete);

private:

	enum TWindowState

		{

		EStateIdle = 0,

		EStateFetchingWindow,

		EStateProcessingWindow,

		EStateNavigateWithinWindow,

		EStateLocked

		};

private:

	void StateHandleWindowFetchStarting();

	void StateHandleWindowFetchedL();

	void StateHandleNavigation();

private:

	void CompleteRequest(TInt aCompletionCode = KErrNone);

	void CalculateWindowForCursorPosition(TInt aCursorPosition, TLogWindow& aWindow) const;

	void Reset();

	void SilentCancel();

	void RefetchL(const TLogWindow& aWindow, TInt aCursor);

	void ChangeState(TWindowState aNewState);

	void RemoveEvent(TInt aIndex);

	TInt CalculateCursorPosition(TLogNavigation aNavigate) const;

	TInt FindEvent(TLogId aId);

	TInt FindAndRemoveEvent(TLogId aId);

private:

	RLogSession& iSession;

	const TLogViewId iViewId;

	const TInt iWindowSize;

	MLogViewChangeObserver* iCascadeObserver;

	RPointerArray<CLogEvent> iEvents;

	TWindowState iState;

	TLogWindowAndCursor iWindow;

	TInt iViewRecordCount;

	CLogViewSetupClientOp* iWindowPreparer;

	CLogViewWindowFetcher* iWindowFetcher;

	CLogViewWindowLockObserver* iWindowLockObserver;

	CLogViewWindowChangeObserver* iWindowChangeObserver;

	};

inline 

TInt CLogViewWindow::ViewRecordCount() const

	{

	return iViewRecordCount;

	}

#endif