/*

* Copyright (c) 2006 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:   Group of textures.

*

*/

#include "alf/alftexturegroup.h"

#include "alf/alfenv.h"

#include "alf/alftexture.h"

NONSHARABLE_CLASS( CAlfInternalTextureLoadObserver ) : public CBase, public MAlfTextureLoadingCompletedObserver

    {

public:

    /**

     * Static factory method. 

     * @param aEnv Environment

     */

    static CAlfInternalTextureLoadObserver* NewL(CAlfTextureGroup& aTextureGroup);

    /**

     * Static factory method. 

     * @param aEnv Environment

     */

    static CAlfInternalTextureLoadObserver* NewLC(CAlfTextureGroup& aTextureGroup);

   /**

     * Destructor

     */

    virtual ~CAlfInternalTextureLoadObserver();

   /**

     * From MAlfTextureLoadingCompletedObserver

     */

    void TextureLoadingCompleted(CAlfTexture& aTexture,

                                TInt aTextureId,

                                TInt aErrorCode);

private:

   /**

     * Constructor.

     */

    CAlfInternalTextureLoadObserver();

   /**

     * Constructor.

     */

    void ConstructL(CAlfTextureGroup& aTextureGroup);

private:

    CAlfTextureGroup* iTextureGroup; // Not owned   

    };

// Private structure

struct CAlfTextureGroup::TPrivateData

    {

    /** Environment */

    CAlfEnv* iEnv;                	

    /** Queue of texture group loading observers. */

    RPointerArray<MAlfTextureGroupLoadingCompletedObserver> iLoadObserverQueue;

    /** Queue of textures of this group. Textures are not owned by this class */

    RPointerArray<CAlfTexture> iTextures;

    /** Error */ 

    TInt iError;

    /** Flag to enable/disable observing notifications */

    TBool iObservingNotificationsEnabled;

    /** Observer for texture laodings */

    CAlfInternalTextureLoadObserver* iTextureLoadObserver;

    };

// ======== MEMBER FUNCTIONS ========

// ---------------------------------------------------------------------------

// Constructor

// ---------------------------------------------------------------------------

//

EXPORT_C CAlfTextureGroup::CAlfTextureGroup() 

	{

	}

// ---------------------------------------------------------------------------

// Destructor

// ---------------------------------------------------------------------------

//

EXPORT_C CAlfTextureGroup::~CAlfTextureGroup()

        {

// ---------------------------------------------------------------------------

// NewL

// ---------------------------------------------------------------------------

//

EXPORT_C CAlfTextureGroup* CAlfTextureGroup::NewL(CAlfEnv& aEnv)

	{

	CAlfTextureGroup* self = CAlfTextureGroup::NewLC(aEnv);        

    CleanupStack::Pop( self );

    return self;		

	}

// ---------------------------------------------------------------------------

// NewLC

// ---------------------------------------------------------------------------

//

EXPORT_C CAlfTextureGroup* CAlfTextureGroup::NewLC(CAlfEnv& aEnv)

	{

    CAlfTextureGroup* self = new( ELeave ) CAlfTextureGroup();

    CleanupStack::PushL( self );

    self->ConstructL(aEnv);

    return self;	

	}

// ---------------------------------------------------------------------------

// 2nd phase constructor

// ---------------------------------------------------------------------------

//

EXPORT_C void CAlfTextureGroup::ConstructL(CAlfEnv& aEnv)

	{

    iData = new (ELeave) TPrivateData;    

    // Zero all data

    iData->iEnv = &aEnv;

    iData->iError = KErrNone;

    iData->iObservingNotificationsEnabled = ETrue;

    iData->iTextureLoadObserver = NULL;

    iData->iTextureLoadObserver = CAlfInternalTextureLoadObserver::NewL(*this);    

	}

// ---------------------------------------------------------------------------

// 

// ---------------------------------------------------------------------------

//

EXPORT_C void CAlfTextureGroup::AddTextureL(CAlfTexture& aTexture)

    {

    if (!IsTextureInGroup(aTexture))

        {            

        TBool addLoadObserver = ETrue;

        for(TInt i = 0; i < Count(); i++)

          	{

        	if (iData->iTextures[i]->TextureManager() == aTexture.TextureManager())

        		{

                addLoadObserver = EFalse;

        		break;

        		}								                       

            }

        iData->iTextures.Append(&aTexture);

        if (addLoadObserver)

            {

            RegisterAsTextureLoadObserverL(aTexture.TextureManager());                        

            }

        }            

    }

// ---------------------------------------------------------------------------

// 

// ---------------------------------------------------------------------------

//

EXPORT_C void CAlfTextureGroup::RemoveTexture(CAlfTexture& aTexture)

    {

    if (IsTextureInGroup(aTexture))

        {            

        for(TInt i = 0; i < Count(); i++)

          	{

        	if (iData->iTextures[i] == &aTexture)

        		{

        		iData->iTextures.Remove(i);

        		iData->iTextures.Compress();

        		break;

        		}								                       

            }                

        TBool removeLoadObserver = ETrue;

        for(TInt i = 0; i < Count(); i++)

          	{

        	if (iData->iTextures[i]->TextureManager() == aTexture.TextureManager())

        		{

                removeLoadObserver = EFalse;

        		break;

        		}								                       

            }

        if (removeLoadObserver)

            {

            UnRegisterAsTextureLoadObserver(aTexture.TextureManager());    

            }

        }

    }

// ---------------------------------------------------------------------------

// 

// ---------------------------------------------------------------------------

//

EXPORT_C TBool CAlfTextureGroup::IsLoadingCompleted() const

    {

    for (TInt i=0; i<Count();i++)

        {

        if ((Texture(i).Size() == TSize(0,0)) || !Texture(i).HasContent())

            {

            return EFalse;    

            }

        }

    if (Count() == 0)

        {

        return EFalse;            

        }

    return ETrue;   

    }

// ---------------------------------------------------------------------------

// 

// ---------------------------------------------------------------------------

//

EXPORT_C TInt CAlfTextureGroup::Count() const

    {

    return iData->iTextures.Count();    

    }

// ---------------------------------------------------------------------------

// 

// ---------------------------------------------------------------------------

//

EXPORT_C CAlfTexture& CAlfTextureGroup::Texture( TInt aIndex ) const

    {

    return *iData->iTextures[aIndex];    

    }

// ---------------------------------------------------------------------------

// 

// ---------------------------------------------------------------------------

//

EXPORT_C void CAlfTextureGroup::AddLoadObserverL(MAlfTextureGroupLoadingCompletedObserver& aObserver)

    {

    iData->iLoadObserverQueue.Append(&aObserver);            

    }

// ---------------------------------------------------------------------------

// 

// ---------------------------------------------------------------------------

//

EXPORT_C void CAlfTextureGroup::RemoveLoadObserver(MAlfTextureGroupLoadingCompletedObserver& aObserver)

    {

    TInt count = iData->iLoadObserverQueue.Count();

    for(TInt i = 0; i < count; i++)

      	{

    	if (iData->iLoadObserverQueue[i] == &aObserver)

    		{

    		iData->iLoadObserverQueue.Remove(i);

    		iData->iLoadObserverQueue.Compress();

    		break;

    		}								                       

        }                

    }

// ---------------------------------------------------------------------------

// 

// ---------------------------------------------------------------------------

//

EXPORT_C void CAlfTextureGroup::EnableLoadObservers(TBool aEnable)

    {

    iData->iObservingNotificationsEnabled = aEnable;    

    }

// ---------------------------------------------------------------------------

// 

// ---------------------------------------------------------------------------

//

void CAlfTextureGroup::NotifyTextureAvailability(CAlfTexture& aTexture,

                                TInt aErrorCode)

    {

    if (IsTextureInGroup(aTexture))

        {

        if (aErrorCode != KErrNone)

            {

            iData->iError = aErrorCode;    

            }

        if (IsLoadingCompleted() && iData->iObservingNotificationsEnabled)

            {

            NotifyObservers();    

            }            

        }            

    }

// ---------------------------------------------------------------------------

// 

// ---------------------------------------------------------------------------

//

TBool CAlfTextureGroup::IsTextureInGroup(CAlfTexture& aTexture) const

    {

    TInt count = iData->iTextures.Count();

    for(TInt i = 0; i < Count(); i++)

      	{

    	if (iData->iTextures[i] == &aTexture)

    		{

    		return ETrue;

    		}								                       

        }                

    return EFalse;    

    }

// ---------------------------------------------------------------------------

// 

// ---------------------------------------------------------------------------

//

void CAlfTextureGroup::NotifyObservers()

    {

    TInt count = iData->iLoadObserverQueue.Count();

    for(TInt i = 0; i < count; i++)

      	{

    	iData->iLoadObserverQueue[i]->TextureGroupLoadingCompleted(*this,iData->iError);

        }                        

    }

// ---------------------------------------------------------------------------

// 

// ---------------------------------------------------------------------------

//

void CAlfTextureGroup::RegisterAsTextureLoadObserverL(CAlfTextureManager* aManager)

    {

    if (aManager)

        {

        aManager->AddLoadObserverL(iData->iTextureLoadObserver);    

        }        

    }

// ---------------------------------------------------------------------------

// 

// ---------------------------------------------------------------------------

//

void CAlfTextureGroup::UnRegisterAsTextureLoadObserver(CAlfTextureManager* aManager)

    {

    if (aManager)

        {

        aManager->RemoveLoadObserver(iData->iTextureLoadObserver);    

        }                

    }

// ---------------------------------------------------------------------------

// 

// ---------------------------------------------------------------------------

//

CAlfInternalTextureLoadObserver* CAlfInternalTextureLoadObserver::NewL(CAlfTextureGroup& aTextureGroup)

    {

	CAlfInternalTextureLoadObserver* self = CAlfInternalTextureLoadObserver::NewLC(aTextureGroup);        

    CleanupStack::Pop( self );

    return self;		        

    }

// ---------------------------------------------------------------------------

// 

// ---------------------------------------------------------------------------

//

CAlfInternalTextureLoadObserver* CAlfInternalTextureLoadObserver::NewLC(CAlfTextureGroup& aTextureGroup)

    {

    CAlfInternalTextureLoadObserver* self = new( ELeave ) CAlfInternalTextureLoadObserver();

    CleanupStack::PushL( self );

    self->ConstructL(aTextureGroup);

    return self;	            

    }

// ---------------------------------------------------------------------------

// 

// ---------------------------------------------------------------------------

//

CAlfInternalTextureLoadObserver::~CAlfInternalTextureLoadObserver()

    {        

    }

// ---------------------------------------------------------------------------

// 

// ---------------------------------------------------------------------------

//

CAlfInternalTextureLoadObserver::CAlfInternalTextureLoadObserver()

    {        

    }

// ---------------------------------------------------------------------------

// 

// ---------------------------------------------------------------------------

//

void CAlfInternalTextureLoadObserver::ConstructL(CAlfTextureGroup& aTextureGroup)

    {

    iTextureGroup = &aTextureGroup;    

    }

// ---------------------------------------------------------------------------

// 

// ---------------------------------------------------------------------------

//

void CAlfInternalTextureLoadObserver::TextureLoadingCompleted(CAlfTexture& aTexture,

                                TInt /*aTextureId*/,

                                TInt aErrorCode)

    {

    iTextureGroup->NotifyTextureAvailability(aTexture, aErrorCode);        

    }