/*

* Copyright (c) 2007 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:   Manager for cross-session resources.

*

*/

#ifndef C_ALFSRVRESOURCEMANAGER_H

#define C_ALFSRVRESOURCEMANAGER_H

#include <e32base.h>

#include <hwrmlight.h>

#include <uiacceltk/HuiEnv.h>

class CAlfAppSrvSessionBase;

/**

 *  Manager for cross-session resources.

 *

 *  Handles the scheduler pausing when the lights go off or the 

 *  application server goes into the background. 

 *

 *  This class is a candidate for adding logic when 

 *  releasing/restoring textures based on the cache side.

 *

 *  @since S60 v3.2

 */

NONSHARABLE_CLASS( CAlfSrvResourceManager ): 

    public CBase, 

    public MHWRMLightObserver

    {

public:

    /**

     * Two-phased constructor

     *

     * @param aEnv Environment.

     * @return New object. Ownership transfrerred.

     */

    static CAlfSrvResourceManager* NewL( CHuiEnv& aEnv );

    /**

     * Destructor.

     */

    virtual ~CAlfSrvResourceManager();

    /**

     * Called when the visibility of the appserver window changes.

     *

     * @param aVisible ETrue if the window is fully/partially visible

     *                 EFalse if the window is totally hidden

     */

    void SetServerWindowPartiallyVisible( TBool aVisible );

    /**

     * Called when the active session changes.

     *

     * @param aSession Can be NULL.

     */

    void SetActiveSession( CAlfAppSrvSessionBase* aSession );

private:

    /**

     * Constructor

     */

    CAlfSrvResourceManager( CHuiEnv& aEnv );

    /**

     * Constructor

     */

    void ConstructL();

    /**

     * From MHWRMLightObserver

     *

     * Called when light status changes.

     */

    void LightStatusChanged(TInt aTarget, CHWRMLight::TLightStatus aStatus);

    /**

     * Updates the scheduler state based on the current status.

     */

    void UpdateSchedulerState();

    /**

     * Restarts the scheduler.

     */

    void Run();

    /**

     * Pauses the scheduler.

     */

    void Pause();

    /**

     * Return ETrue if any display lights are on

     * @return ETrue if display lights are ON.

     */

    TBool LightsOn() const;

private: // data

    /**

     * Environment. 

     * Not own.

     */

    CHuiEnv& iEnv;

    /**

     * Currently active session. Can be NULL. 

     * Not own.

     */

    CAlfAppSrvSessionBase* iActiveSession;

    /**

     * Internal flags.

     */

    TUint iFlags;

    /**

     * Lights controller/observer.

     * Own.

     */

    CHWRMLight* iLight; 

    };

#endif // C_ALFSRVRESOURCEMANAGER_H