/*

* Copyright (c) 2008 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:  State Manager

*

*/

#ifndef _AISTATEMANAGER_H

#define _AISTATEMANAGER_H

// System includes

#include <e32base.h>

#include <babitflags.h>

// User includes

#include <aifwdefs.h>

#include "aistateobserver.h"

// Forward declarations

class CAiPluginFactory;

class CHsContentPublisher;

class THsPublisherInfo;

/**

 * State Manager

 * 

 * @ingroup group_aifw

 * @lib aifw.lib

 * @since S60 5.0

 */

NONSHARABLE_CLASS( CAiStateManager ) : public CBase,

    {

private:

    // Data types

    enum TState

        {

        ESuspended = 0,        

        EAlive,                

        };

    enum TFlags

        {

        EIsForeground = 0,

        EIsLightsOn,        

        EIsOnline,

        EShutdown

        };

public:    

    // Constructors and destructor

    /**

     * Two-phased constructor.

     */

    static CAiStateManager* NewL( CAiPluginFactory& aFactory );

    /**

     * Two-phased constructor. Leaving on stack

     */

    static CAiStateManager* NewLC( CAiPluginFactory& aFactory );

    /**

     * Destructor

     */

    ~CAiStateManager();

private:

    // private constructors

    /**

     * Leaving constructor

     */

    void ConstructL();

    /**

     * C++ default constructor

     */

    CAiStateManager( CAiPluginFactory& aFactory );

private:

    // from MAiStateObserver

    /**

     * @see MAiStateObserver

     */

    void NotifyStateChange( 

        TAiFwState aReason );

    /**

     * @see MAiStateObserver

     */    

    TInt NotifyLoadPlugin( const THsPublisherInfo& aInfo, 

        TAiFwLoadReason aReason );

    /**

     * @see MAiStateObserver

     */    

    void NotifyDestroyPlugin( const THsPublisherInfo& aInfo,

        TAiFwDestroyReason aReason );

    /**

     * @see MAiStateObserver

     */        

    /**

     * @see MAiStateObserver

     */            

private:

    // new functions

    /**

     * Evaluates next state 

     * 

     * @since S60 5.2

     * @return Next state

     */

    TState EvaluateNextState() const;

    /**

     * Process state change for all plugins

     * 

     * @since S60 5.2

     * @param aNextState Next state where plugins are driven

     */

    void ProcessStateChange( TState aNextState );

    /**

     * Process general theme state change for all plugins

     * 

     * @since S60 5.2     

     */    

    void ProcessGeneralThemeChange();

    /**

     * Process backup/restore state change for all plugins

     * 

     * @since S60 5.2     

     * @param aStarted ETrue when backup started

     */        

    void ProcessBackupRestore( TBool aStarted );

    /**

     * Process online / offline state change for all plugins

     * 

     * @since S60 5.2

     */

    void ProcessOnlineStateChange();

    /** 

     * Runs plugin startup sequence

     * 

     * @since S60 5.2     

     * @param aPlugin Plugin to start

     * @param aReason Start reason

     */

    void StartPlugin( CHsContentPublisher& aPlugin, 

        CHsContentPublisher::TStartReason aReason );

    /** 

     * Runs plugin shutdown sequence

     * 

     * @since S60 5.2     

     * @param aPlugin Plugin to stop

     * @param aReason Stop reason

     */    

    void StopPlugin( CHsContentPublisher& aPlugin,

        CHsContentPublisher::TStopReason aReason );

    /**

     * Destroys all plugins from plugin factory

     * 

     * @since S60 5.2

     */

    void DestroyPlugins();

private:

    // data

    /** Plugin Factory, Not owned */

    CAiPluginFactory& iFactory;

    /** Current state */

    TState iCurrentState;    

    /** Flags */

    TBitFlags32 iFlags;

    /** Halted flag */

    TBool iHalt;

private:

    // friend classes

#ifdef _AIFW_UNIT_TEST

    friend class UT_AiStateManager;

#endif        

    };

#endif // _AISTATEMANAGER_H

// End of file