/*

* Copyright (c) 2008-2009 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:  Implementation class for Medialist Access for Data   

*

*/

#include "glxmedialistmulmodelproviderimpl.h"      // The actual implemntation for providign the data to the clients is done here

#include "glxbindingset.h"                         // This basically holds the bindings required to populate the visual item

#include <mglxmedialist.h>                         // Interface for reading lists of media items

#include "glxthumbnailinfo.h"

#include "glxattributerequirement.h"               // This class will set the required attribute to the medialist

#include "glxerrormanager.h"                       // for handling the error attribute that may be attached to items

#include "glxthumbnailattributeinfo.h"

#include "glxmulbindingsetfactory.h"               // CreateBindingSetL creates instance of Binding set

#include <mul/imulcoverflowwidget.h>               // An interface for Multimedia coverflow Widget

#include <glxresolutionutility.h>                  // Singleton containing resolution utility methods

#include <glxtracer.h>

#include <glxlog.h>                                // Logging

#include <glxuiutility.h>                          // Alf utils lib glxalfutils.lib

#include "glxtexturemanager.h"

static const char* const KListWidget = "ListWidget";

static const char* const KCoverFlowWidget = "CoverflowWidget";

using namespace Alf;

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

// NewL

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

//

CGlxMediaListMulModelProviderImpl* CGlxMediaListMulModelProviderImpl::NewL( 

	CAlfEnv& aEnv,

	IMulWidget& aWidget,

	MGlxMediaList& aMediaList,

	const TGlxMulBindingSetFactory& aFactory,

	Alf::mulwidget::TLogicalTemplate aDefaultTemplate,

	TInt aDataWindowSize )

    {

    TRACER("CGlxMediaListMulModelProviderImpl::NewL");

    CGlxMediaListMulModelProviderImpl* self = 

        new ( ELeave) CGlxMediaListMulModelProviderImpl( aWidget, aMediaList );

    CleanupStack::PushL( self );

    self->ConstructL( aEnv, aFactory, aDefaultTemplate, aDataWindowSize );

    CleanupStack::Pop( self );

    return self;

    }

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

// Constructor

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

//

CGlxMediaListMulModelProviderImpl::CGlxMediaListMulModelProviderImpl( 

    IMulWidget& aWidget, MGlxMediaList& aMediaList )

        : CGlxMulModelProviderBase( aWidget ), iMediaList( aMediaList ),iWidget(aWidget)

    {

    }

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

// ConstructL

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

//

void CGlxMediaListMulModelProviderImpl::ConstructL( CAlfEnv& aEnv, 

													const TGlxMulBindingSetFactory& aFactory, 

													Alf::mulwidget::TLogicalTemplate aDefaultTemplate, TInt aDataWindowSize ) 

    {

    TRACER("CGlxMediaListMulModelProviderImpl::ConstructL");

    BaseConstructL( aEnv, aDefaultTemplate, aDataWindowSize );

	iMediaList.AddMediaListObserverL(this);

	iUiUtility = CGlxUiUtility::UtilityL();

	iAttributeRequirements = CGlxAttributeRequirements::NewL( iMediaList);

    iBindingSet = aFactory.CreateBindingSetL( *this );

    TInt height;

    TInt width;

    iWidget.GetIconSize(aDefaultTemplate,Alf::mulvisualitem::KMulIcon1,height,width); 

    TSize thumbnailSize(width,height);

	iBindingSet->AddRequirementsL( *iAttributeRequirements ,thumbnailSize );

	if( iMediaList.Count() > 0 )

	    {

	    HandleItemAddedL( 0, iMediaList.Count() - 1, &iMediaList );

		if(!iUiUtility->IsPenSupported())

			{			

			CMPXCollectionPath* path = iMediaList.PathLC( NGlxListDefs::EPathFocusOrSelection );

			iBindingSet->HandleItemChangedL( *path ); 

			CleanupStack::PopAndDestroy( path );

			}

		iMediaIDForTextureDeletion = iMediaList.Item(iMediaList.FocusIndex()).Id();

	    }

	if(UString( KListWidget ) == UString(iWidget.widgetName() ) ||  UString( KCoverFlowWidget ) == UString(iWidget.widgetName() ) )

	    {

	    AddWidgetEventHandler();

	    }

    } 

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

// Destructor

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

//

CGlxMediaListMulModelProviderImpl::~CGlxMediaListMulModelProviderImpl()

    {

    TRACER("CGlxMediaListMulModelProviderImpl::~CGlxMediaListMulModelProviderImpl");

    delete iBindingSet;

    delete iAttributeRequirements;

    iMediaList.RemoveMediaListObserver( this );

    if (iUiUtility)

        {

        iUiUtility->Close();

        }

    }

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

// HandleBindingChanged

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

// 

void CGlxMediaListMulModelProviderImpl::HandleBindingChanged( 

        const CGlxBinding& aBinding )

    {

    TRACER("CGlxMediaListMulModelProviderImpl::HandleBindingChanged");

    SetDataT( aBinding, iMediaList.Item(iMediaList.FocusIndex()), 

                iMediaList.FocusIndex() );

    }

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

// HandleFocusChanged

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

//     

void CGlxMediaListMulModelProviderImpl::HandleFocusChanged( TInt 

	    /*aNewFocusIndex*/, TInt /*aPreviousFocusIndex*/ )	

	{

	TRACER("CGlxMediaListMulModelProviderImpl::HandleFocusChanged");

    if (CGlxBinding::EUpdateRequested == iBindingSet->HandleFocusChanged( ETrue ) )

        {

        UpdateItems( iMediaList.FocusIndex(), 1 );

        }

   	}  

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

// HandleFocusChangedL

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

//	

void CGlxMediaListMulModelProviderImpl::HandleFocusChangedL( NGlxListDefs::TFocusChangeType /*aType*/, 

        TInt aNewIndex, TInt aOldIndex, MGlxMediaList* aList )	  

	{

	TRACER("CGlxMediaListMulModelProviderImpl::HandleFocusChangedL");

	CMPXCollectionPath* path = iMediaList.PathLC( NGlxListDefs::EPathFocusOrSelection );

	if ( aNewIndex != FocusIndex() )

	    {

	    // focus was changed not by the widget, but by some other reason (e.g., item insertion)

	   	//Aki changes -  todo

	    SetFocusIndex( aNewIndex );

	    }

	iBindingSet->HandleItemChangedL( *path );  // Item changed is handled first before Updating the List - see line 168 moved from here

	if( aList->FocusIndex() >=0 && aOldIndex <= aList->Count() -1 && aOldIndex!=-1 ) 

	    {

        UpdateItems( aOldIndex, 1 );    

        UpdateItems( aNewIndex, 1 ); 

        }

	CleanupStack::PopAndDestroy( path );

	// Check for the deletion of a media item and delete the texture of the deleted media item.

	// Deleting the texture after removing the item from the mul model and updating the new image.

	// Hence the texture deletion is done at a later stage here instead of in HandleItemRemovedL().

	if ((aNewIndex == aOldIndex) && (iMediaIDForTextureDeletion.Value()

            != KGlxInvalidIdValue) || (aNewIndex == KErrNotFound && aOldIndex

            == 0))

        {

        iUiUtility->GlxTextureManager().RemoveTexture(

                iMediaIDForTextureDeletion, EFalse);

        }

    // Storing the focussed media id for use during the focussed media item deletion operation

    if (aNewIndex >= 0 && aNewIndex < aList->Count())

        {

        iMediaIDForTextureDeletion = aList->Item(aNewIndex).Id();

        }

    else

        {

        iMediaIDForTextureDeletion.SetValue(KGlxInvalidIdValue);

        }

	}

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

// HandleItemAddedL

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

//

void CGlxMediaListMulModelProviderImpl::HandleItemAddedL( TInt aStartIndex, 

        TInt aEndIndex, MGlxMediaList* aList )

    {

    TRACER("CGlxMediaListMulModelProviderImpl::HandleItemAddedL");

    GLX_LOG_INFO1("HandleItemAddedL::aStartIndex %d", aStartIndex);

    GLX_LOG_INFO1("HandleItemAddedL::aEndIndex %d", aEndIndex);

    InsertItemsL( aStartIndex, aEndIndex - aStartIndex + 1, aList->FocusIndex() );

    }

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

// HandleItemRemoved

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

//

void CGlxMediaListMulModelProviderImpl::HandleItemRemovedL( TInt aStartIndex, 

        TInt aEndIndex, MGlxMediaList* /*aList*/ )

    {

    TRACER("CGlxMediaListMulModelProviderImpl::HandleItemRemovedL");

    RemoveItems( aStartIndex, aEndIndex - aStartIndex + 1 );

    }

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

// HandleAttributesAvailableL

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

//

void CGlxMediaListMulModelProviderImpl::HandleAttributesAvailableL( TInt aIndex, 

        const RArray<TMPXAttribute>& aAttributes, MGlxMediaList* /*aList*/ )

    {

    TRACER("CGlxMediaListMulModelProviderImpl::HandleAttributesAvailableL");

    GLX_LOG_INFO1("HandleAttributesAvailableL::Index %d", aIndex);

     if(iBindingSet->HasRelevantAttributes( aAttributes ) )

        {

        UpdateItems( aIndex, 1 );

        }

    }

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

// HandleError

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

//

void CGlxMediaListMulModelProviderImpl::HandleError( TInt aError )

    {

    TRACER("CGlxMediaListMulModelProviderImpl::HandleError");

    TRAP_IGNORE( DoHandleErrorL( aError ) );

    }

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

// HandleError

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

//

void CGlxMediaListMulModelProviderImpl::DoHandleErrorL( TInt /*aError*/ )

    {

    TRACER("CGlxMediaListMulModelProviderImpl::DoHandleErrorL");

    // Check for items for which fetching a thumbnail has failed, and replace

    // the default icon with broken icon

	TInt count = iMediaList.Count();

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

	    {

	    const TGlxMedia& item = iMediaList.Item( i );

        TInt thumbnailError = GlxErrorManager::HasAttributeErrorL(

                                item.Properties(), KGlxMediaIdThumbnail );

        if( thumbnailError )

            {

            UpdateItems( i , 1 );

            }

	    }

    }

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

// ProvideData

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

//

void  CGlxMediaListMulModelProviderImpl::ProvideData (int aIndex, int aCount, 

	MulDataPath /*aPath*/)

    {

    TRACER("CGlxMediaListMulModelProviderImpl::ProvideData");

    GLX_LOG_INFO1("ProvideData::aCount %d", aCount);

    if( KErrNotFound != iMediaList.FocusIndex() )

        {

        for(int i = aIndex; i < aIndex + aCount ; i++)

            {

		    SetDataT( *iBindingSet, iMediaList.Item(i), i );            

            }

        }

    else

    	return;

    }

void CGlxMediaListMulModelProviderImpl::HandleOrientationChanged()

	{

	TRACER("CGlxMediaListMulModelProviderImpl::HandleOrientationChanged");

	//Fix for ESLM-7VGCS8

    //Since iBindingSet->AddRequirementsL() will change the iFsThumbnailContext's

    //thumbnail size due to which  thumbnail fetched for old context is getting

    //deleted in clean-up. But actually S60 TNM provides same thumbnail for both

    //the configurations requests,So it is unneccesary to delete the existing

    //thumbnail and request for the same. To avoid this ,iBindingSet->AddRequirementsL()

    //and UpdateItems() is removed so that  the context will not be changed

    //and the thumbnail deletion will not happen.

  	}

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

// HandleItemModifiedL

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

//  

void CGlxMediaListMulModelProviderImpl::HandleItemModifiedL( const RArray<TInt>& aItemIndexes,

    MGlxMediaList* aList )

    {

    //Bug fix for PKAA-7NRBYZ

    //First remove all the textures from the list in the texture manager

    //otherwise it would not create a new texture for the modified image.

    for(TInt index = 0;index<aItemIndexes.Count();index++)

        {

        TGlxMedia media = aList->Item(aItemIndexes[index]);

        iUiUtility->GlxTextureManager().RemoveTexture(media.Id(),ETrue);

        }            

    //Now update the items, this would create the new textures and update the view.

    for(TInt index = 0;index<aItemIndexes.Count();index++)

        UpdateItems(aItemIndexes[index],1);

    }

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

// UpdateItems

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

//  

void CGlxMediaListMulModelProviderImpl::UpdateItems( TInt aIndex, TInt aCount )

    {

    TRACER("CGlxMediaListMulModelProviderImpl::UpdateItems");

    CGlxMulModelProviderBase::UpdateItems(aIndex, aCount);

    }