/*

* 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:   

*

*/

#ifndef HUIFXEFFECTCACHE_H_

#define HUIFXEFFECTCACHE_H_

#include <e32cmn.h>

#include <e32base.h>

#include <e32hashtab.h>

#include "HuiFxEffectParser.h"

#include "huieffectable.h"

class MHuiFxParsingEndedObserver;

class MAlfGfxEffectObserver;

class MHuiFxEffectCacheNode

{

public:

    virtual ~MHuiFxEffectCacheNode() { }

    virtual TPtrC Id()=0; // how to regognize this instance

    virtual MHuiFxEffectCacheNode *CloneL()=0; // from this instance to cache

    virtual void LightOperationL(MHuiFxEffectCacheNode *aCached)=0; // from cache to this instance

    virtual void HeavyOperationL(MHuiFxParsingEndedObserver *aObserver, TInt aIndex)=0;    // from nothing to this instance

    virtual TInt Ref(TInt aCount)=0; // increase count by aCount and return count.

    virtual void ParsingEndedBefore()=0;

    virtual void ParsingEndedAfter(MHuiFxEffectCacheNode *aCached)=0;

    virtual TBool FxmlUsesInput1()=0;

};

class CHuiFxEffectCache : public CBase, public MHuiFxParsingEndedObserver

{

public:

    IMPORT_C static CHuiFxEffectCache* NewL();

    void CreateL(MHuiFxEffectCacheNode *aNode); // moves ownership

    IMPORT_C void FindOrCreateL(MHuiFxEffectCacheNode *aNode); // moves ownership

    MHuiFxEffectCacheNode *FindDup(const TDesC &aId);

    IMPORT_C void UnUse(MHuiFxEffectCacheNode *aNode);

    IMPORT_C ~CHuiFxEffectCache();

    void ParsingEnded(TInt aHandle);

    MHuiFxEffectCacheNode *FindCached(const TDesC &aId);

    TBool FxmlUsesInput1(const TDesC &aFileName);

private:

    struct IDNode

        {

        TInt iId;

        MHuiFxEffectCacheNode *iNode;

        };

    MHuiFxEffectCacheNode *Find(MHuiFxEffectCacheNode *aNode);

    static bool Compare(MHuiFxEffectCacheNode *aNode1, MHuiFxEffectCacheNode *aNode2);

    void Remove(RPointerArray<MHuiFxEffectCacheNode> &aEffects, MHuiFxEffectCacheNode *aNode);

    void Remove(RHashMap<TInt, MHuiFxEffectCacheNode*> &aMap, MHuiFxEffectCacheNode *aNode);

    void Remove(RArray<IDNode> &aMap, MHuiFxEffectCacheNode *aNode);

    TInt FindById(TInt aId);

    TInt UniqueId();

private:

   RPointerArray<MHuiFxEffectCacheNode> iCachedEffects;

   //RPointerArray<MHuiFxEffectCacheNode> iDuplicateEffects; // array can have null pointers in it

   //RHashMap<TInt, MHuiFxEffectCacheNode*> iDuplicateEffects;

   RArray<IDNode> iDuplicateEffects;

   TInt iUniqueId;

};

class CHuiFxEffect;

class TRect;

class CHuiVisual;

class CHuiFxEngine;

// This class has all dependencies to outside objects.

class CHuiFxEffectCacheEffectNode : public CBase, public MHuiFxEffectCacheNode

{

public:

     IMPORT_C CHuiFxEffectCacheEffectNode(const TDesC &aFileName, CHuiFxEffect *&aEffect, MHuiEffectable *aVisual, TRect *extRect, CHuiFxEngine *aEngine) 

	: iFileName(aFileName.AllocL()), iEffect(aEffect), iVisual(aVisual), iExtRect(extRect), iEffectCached(0), iEngine(aEngine), iRefCount(0), iParser(0) { }

     IMPORT_C ~CHuiFxEffectCacheEffectNode();

     void SetEffectEndObserver( MAlfGfxEffectObserver* aEffectEndObserver, TInt aHandle );

     void SetEffectFlags( TInt aFlags );

     void SetEffectGroup( TInt aGroup);

private:

     CHuiFxEffectCacheEffectNode(const TDesC &aFileName, CHuiFxEffect *aEffect) : iFileName(aFileName.AllocL()), iEffect(iEffectCached), iVisual(0), iExtRect(0), iEffectCached(aEffect), iRefCount(0), iParser(0), iEffectEndObserver(0), iHandle(0) { }

public: // from MHuiFxEffectCacheNode

     TPtrC Id();

     MHuiFxEffectCacheNode *CloneL();

     void LightOperationL(MHuiFxEffectCacheNode *aCached);

     void HeavyOperationL(MHuiFxParsingEndedObserver *aObserver, TInt aIndex);

     TInt Ref(TInt aCount);

     void ParsingEndedBefore();

     void ParsingEndedAfter(MHuiFxEffectCacheNode *aCached);

     TBool FxmlUsesInput1();

private:

     const TDesC *iFileName;

     CHuiFxEffect *iEffect;

     MHuiEffectable *iVisual;

     TRect *iExtRect;

     CHuiFxEffect *iEffectCached;

     CHuiFxEngine *iEngine;

     TInt iRefCount;

     CHuiFxEffectParser *iParser;

     MAlfGfxEffectObserver* iEffectEndObserver;

     TInt iHandle;

     TInt iFlags;

     TInt iGroup;

};

#endif