/*

* 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: View Manager 

*

*/

#ifndef XNVIEWMANAGER_H

#define XNVIEWMANAGER_H

// System includes

#include <e32base.h>

// User includes

// Forward declarations

class CXnUiEngine;

class CXnComposer;

class CXnODTParser;

class CXnEditor;

class CXnEcomHandler;

class CXnRootData;

class CXnViewData;

class CXnPluginData;

class CXnNode;

class CXnODT;

class CXnResource;

class CXnControlAdapter;

class CXnAppUiAdapter;

class CHsContentInfo;

class CXnViewAdapter;

class CXnOomSysHandler;

class CIdle;

namespace hspswrapper

    {

    class CHspsWrapper;

    }

using namespace hspswrapper;

// Classe declaration

/**

 * Notifies view changes

 *

 * @ingroup group_xnlayoutengine

 * @lib xn3layoutengine.lib

 * @since S60 5.0

 */

NONSHARABLE_CLASS( MXnViewObserver )

    {

public:

    // new functions

    virtual void NotifyViewActivatedL( const CXnViewData& aViewData ) = 0;

    virtual void NotifyViewDeactivatedL( const CXnViewData& aViewData ) = 0;

    virtual void NotifyConfigureWidgetL(

        const CHsContentInfo& aContentInfo,

        CXnPluginData& aPluginData ) = 0;

    virtual void NotifyWidgetAdditionL( const CXnPluginData& aPluginData ) = 0;

    virtual void NotifyWidgetRemovalL( const CXnPluginData& aPluginData ) = 0;

    virtual void NotifyViewAdditionL( const CXnPluginData& aPluginData ) = 0;

    virtual void NotifyViewRemovalL( const CXnPluginData& aPluginData ) = 0;

    };

/**

 * Manages views in UiEngine.

 *

 * @ingroup group_xnlayoutengine

 * @lib xn3layoutengine.lib

 * @since S60 5.0

 */

NONSHARABLE_CLASS( CXnViewManager ) : public CBase

    {

public:

    /**

     * Two-phased constructor.

     */

    static CXnViewManager* NewL(

        CXnAppUiAdapter& aAdapter );

    /**

     * Two-phased constructor.

     */    

    static CXnViewManager* NewLC(

        CXnAppUiAdapter& aAdapter );        

    /**

     * Destructor

     */

    ~CXnViewManager();

private:

    // constructors

    /** 

     * C++ constructor

     */

    CXnViewManager( CXnAppUiAdapter& aAdapter );

    /**

     * 2nd phase constructor

     */

    void ConstructL();

public:

    // New functions

    inline void SetUiEngine( CXnUiEngine& aUiEngine );

    inline CXnUiEngine& UiEngine() const;

    inline CXnComposer& Composer() const;

    inline CXnEditor& Editor() const;

    inline CXnAppUiAdapter& AppUiAdapter() const;

    CXnODT* ODT() const;

    CXnNode* RootNode() const;

    CXnNode* ViewNode() const;

    CXnODTParser& Parser() const;

    CXnEcomHandler& EcomHandler() const;

    const RPointerArray< CXnControlAdapter >& Controls() const;

    RPointerArray< CXnNode >& PluginNodes() const;

    void PluginDataL( RPointerArray< CXnPluginData >& aList, 

        TBool aGlobal = EFalse ) const;

    TInt PluginDataL( const TDesC8& aParentId, 

        RPointerArray< CXnPluginData >& aList ) const;

    RPointerArray< CXnNode >& AppearanceNodes() const;

    CArrayPtrSeg< CXnResource >& Resources() const ;

    void LoadUiL();

    void ReloadUiL();

    TInt LoadWidgetToPluginL(

        const CHsContentInfo& aContentInfo,

        CXnPluginData& aPluginData );

    TInt UnloadWidgetFromPluginL(

        CXnPluginData& aPluginData, TBool aForce = EFalse );

    TInt ReplaceWidgetToPluginL(

        const CHsContentInfo& aContentInfo,

        CXnPluginData& aPluginData );

    void ActivateNextViewL( TInt aEffectId = 0 );

    void ActivatePreviousViewL( TInt aEffectId = 0 );

    TInt AddViewL( const CHsContentInfo& aInfo );

    void AddViewL( TInt aEffectId = 0 );

    TInt RemoveViewL( const CHsContentInfo& aInfo );

    void RemoveViewL( TInt aEffectId = 0 );

    void AddObserver( const MXnViewObserver& aObserver );

    void RemoveObserver( const MXnViewObserver& aObserver );

    CXnRootData& ActiveAppData() const;

    CXnViewData& ActiveViewData() const;

    TInt ActivateAppL( const TDesC8& aPluginUid );

    TInt ActivateViewL( const TDesC8& aPluginId );    

    TInt ViewAmount() const;

    TInt ViewIndex() const;

    TInt MaxPages() const;

    CXnOomSysHandler& OomSysHandler() const;

    void UpdatePageManagementInformationL();

private:

    // new functions

    void NotifyContainerChangedL( CXnViewData& aViewToActivate );       

    void NotifyViewActivatedL( const CXnViewData& aViewData );

    void NotifyViewDeactivatedL( const CXnViewData& aViewData );

    void NotifyViewAdditionL( const CXnViewData& aViewData );

    void NotifyViewRemovalL( const CXnViewData& aViewData );

    void NotifyConfigureWidgetL(

        const CHsContentInfo& aContentInfo,

        CXnPluginData& aPluginData );

    void NotifyWidgetAdditionL( const CXnPluginData& aPluginData );

    void NotifyWidgetRemovalL( const CXnPluginData& aPluginData );

    CXnViewData* ViewData( CXnNode& aNode ) const;

    CXnViewData& PreviousViewData() const;

    CXnViewData& NextViewData() const;

    void UpdateCachesL();

    void ReportWidgetAmountL( const CXnViewData& aViewData );

    void ShowDiskFullMessageL() const;

    TInt ResolveIconIndex( TInt aPageCount, TInt aPageNum ) const;

    /**

     * Callback for stability timer

     * 

     * @param   aAny    Pointer to CViewManager object

     * @return  TInt    System wide error code.

     */

    static TInt SystemStabileTimerCallback( TAny* aAny );

    /**

     * Reset crash count

     */

    void ResetCrashCount();    

    /**

     * Show error note from resource.

     */

    void ShowErrorNoteL();   

    void DoRobustnessCheckL();

private:

    // data

    /**

     * AppUi adapter.

     * Not own.

     */

    CXnAppUiAdapter& iAppUiAdapter;

    /**

     * Application uid

     */

    TUid iApplicationUid;

    /**

     * HSPS wrapper. 

     * Not own.

     */

    CHspsWrapper* iHspsWrapper;

    /**

     * UiEngine.

     * Not own.

     */

    CXnUiEngine* iUiEngine;

    /**

     * Comopser.

     * Own.

     */

    CXnComposer* iComposer;

    /**

     * Editor.

     * Own.

     */

    CXnEditor* iEditor;

    /**

     * Application configuration root data.

     * Own.

     */

    CXnRootData* iRootData;

    /**

     * Widget amount trigger.

     * Own.

     */

    CXnNode* iWidgetAmountTrigger;

    /**

     * Resources for current view.

     * Own.

     */

    mutable CArrayPtrSeg< CXnResource >* iResources;

    /**

     * Controls for current view.

     * Own.

     */

    mutable RPointerArray< CXnControlAdapter > iControls;

    /**

     * Appearance nodes. This array needs to be updated when UI furniture

     * is changed.

     * Own.

     */

    mutable RPointerArray< CXnNode > iAppearanceNodes;

    /**

     * View observers.

     * Own.

     */

    RPointerArray< MXnViewObserver > iObservers;

    /**

     * OOM system handler. 

     * Own.

     */

    CXnOomSysHandler* iOomSysHandler;

    /**

     * Timer for system stability.

     * Own.

     */

    CPeriodic* iStabilityTimer;

private:   

    // Friend classes

    friend class CXnViewAdapter;           

    };

// Inline functions

#include "xnviewmanager.inl"

#endif