/*
* Copyright (c) 2009-2010 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: Declaration of CSsmLocaleObserverSup class.
*
*/

#ifndef __SSMLOCALEOBSERVERSUP_H__
#define __SSMLOCALEOBSERVERSUP_H__

#include "ssmcommonlocale.h"
#include <e32base.h>
#include <e32property.h>
#include <f32file.h>
#include <ssm/ssmutility.h>
#include <e32hashtab.h> 

class CEnvironmentChangeNotifier;

/**
* SSM Utility plugin which stores locale data to file when it changes and
* after data has been restored from a backup file.
*/
NONSHARABLE_CLASS( CSsmLocaleObserverSup ) : public CActive, public MSsmUtility
    {

public:

    /**
    * Two-phase constructor.
    */
	IMPORT_C static MSsmUtility* NewL();

    /**
    * Destructor.
    */
    virtual ~CSsmLocaleObserverSup();

    /**
    * Call-back method, called when there is a change in locale data.
    */
    void EnvChangeOccurredL();

private: // From CActive

	void RunL();
	void DoCancel();

private: // From MSsmUtility

    void InitializeL();
	void StartL();
	void Release();

private:

    /**
    * First phase constructor.
    */
    CSsmLocaleObserverSup();

    /**
    * Activate the active object.
    */
    void Activate();

    /**
    * Copied fron SysLocale.
    * SaveLocaleL saves TLocale class to the given directory
    * 
    * @param aPath Directory path containing locale data files.
    *              (e.g. "c:\dir" or c:\dir\")
    */
    void SaveRegionL( const TDesC& aPath );

    /**
    * Copied fron SysLocale.
    * LoadRegionL restores TLocale class from the given directory.
    *
    * @param aPath Directory path containing locale data files
    *              (e.g. "c:\dir" or c:\dir\")
    */
    void LoadRegionL( const TDesC& aPath );
    
    /**
    * Initialize the language region mapping
    * 
    */
    void InitializeRegionMappingL();
    
    /**
    * Gets the associated region for the given language
    * 
    */
    TInt MappedRegionL(const TInt aLanguage);

private: // data

    /**
    * Publish & subscribe interface for KUidBackupRestoreKey key.
    */
    RProperty iProperty;

    /**
    * Indicates if restore activity is currently taking place.
    */
    TBool iRestoreActive;

    /**
    * An environment change notifier that notifies us when any change
    * happens in the environment.
    */
    CEnvironmentChangeNotifier* iEnvChangeNotifier;

    /**
    * File server session for writing the locale data files.
    */
    RFs iFs;

    /**
    * Array of  language and region mappings.
    */
    RHashSet<TLanguageRegion>  iLangRegionMappingHashSet;
    };

#endif // __SSMLOCALEOBSERVERSUP_H__