/*

* 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 : Grid view Observers

*

*/

// INCLUDE FILES

// Ganes Headers

#include <ganes/HgItem.h>

#include <ganes/HgGrid.h>                               //Hg Grid Widget

//#include <hg/hgcontextutility.h>

#include <gulicon.h>

#include <glxtracer.h>                                  // For Tracer

#include <glxlog.h>                                     // For Glx Logging

#include <glxuiutility.h>                               // For UiUtility instance

#include <glxicons.mbg>                                 // For Corrupted and not created icons

#include <glxerrormanager.h>                            // For CGlxErrormanager

#include <glxuistd.h>

#include <mglxmedialist.h>                              // CGlxMedialist

#include <glxthumbnailattributeinfo.h>                  // KGlxMediaIdThumbnail

#include <glxdrmutility.h>                              // DRM utility class to provide DRM-related functionality

#include <mpxmediadrmdefs.h>                            // KMPXMediaDrmProtected

#include <glxcollectionplugindownloads.hrh>

#include <glxgridviewdata.rsg>                          // Gridview resource

// Framework

#include <data_caging_path_literals.hrh>

#include <StringLoader.h>

#include <bldvariant.hrh>                               // For feature constants

#include <featmgr.h>		                            // Feature Manager

#include <caf/caferr.h>

#include <AknUtils.h>

#include "glxgridviewmlobserver.h"

const TInt KRecreateGridSize(5); //minimum no of items added to trigger recreate grid

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

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

// Two-phased constructor.

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

//

EXPORT_C CGlxGridViewMLObserver* CGlxGridViewMLObserver::NewL(

        MGlxMediaList& aMediaList, CHgGrid* aHgGrid)

    {

    CGlxGridViewMLObserver* self = 

            new (ELeave) CGlxGridViewMLObserver(aMediaList, aHgGrid);

    CleanupStack::PushL(self);

    self->ConstructL();

    CleanupStack::Pop(self);

    return self;

    }

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

// C++ default constructor can NOT contain any code, that

// might leave.

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

//

CGlxGridViewMLObserver::CGlxGridViewMLObserver(MGlxMediaList& aMediaList,

        CHgGrid* aHgGrid ) : iMediaList(aMediaList), iHgGrid(aHgGrid)

    {

    }

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

// Symbian 2nd phase constructor can leave.

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

//  

void CGlxGridViewMLObserver::ConstructL()

    {

    iMediaList.AddMediaListObserverL(this);

    // For DRm Utility

    iDRMUtility = CGlxDRMUtility::InstanceL();

    CGlxUiUtility* uiUtility = CGlxUiUtility::UtilityL();

    iGridIconSize = uiUtility->GetGridIconSize();

    //Get the HgContextUtility instance

//    iContextUtility = uiUtility->ContextUtility();

    iItemsPerPage = uiUtility->VisibleItemsInPageGranularityL();

    uiUtility->Close() ;

    iQualityTnAttrib = TMPXAttribute (KGlxMediaIdThumbnail, 

        GlxFullThumbnailAttributeId( ETrue,  iGridIconSize.iWidth, 

                iGridIconSize.iHeight ) );

    iSpeedTnAttrib = TMPXAttribute (KGlxMediaIdThumbnail, 

        GlxFullThumbnailAttributeId( EFalse,  iGridIconSize.iWidth, 

                iGridIconSize.iHeight ) );

    }

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

// Destructor

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

//

CGlxGridViewMLObserver::~CGlxGridViewMLObserver()

    {

    iMediaList.RemoveMediaListObserver( this );

    if (iDRMUtility)

        {

        iDRMUtility->Close();

        }

	iModifiedIndexes.Reset();

    }

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

// HandleItemAddedL

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

// 

void CGlxGridViewMLObserver::HandleItemAddedL( TInt aStartIndex, TInt aEndIndex, 

     MGlxMediaList* aList )

    {

    TRACER("CGlxGridViewMLObserver::HandleItemAddedL()");

    GLX_DEBUG3("CGlxGridViewMLObserver::HandleItemAddedL() aStartIndex(%d),"

            " aEndIndex(%d)", aStartIndex, aEndIndex);

    if (!iHgGrid)

        {

        return;

        }

    if ((aEndIndex - aStartIndex) > KRecreateGridSize)

        {

        iHgGrid->ResizeL(aList->Count());

        }

    else

        {

        for (TInt i = aStartIndex; i <= aEndIndex; i++)

            {

            iHgGrid->InsertItem(CHgItem::NewL(), i);

            }

        }

    // Setting the initial focus for all grid views except downloads,

    // for downloads it is already set.

    TInt focusIndex = aList->FocusIndex();

    iHgGrid->SetSelectedIndex(focusIndex);

    }

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

// HandleItemRemoved

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

//  

void CGlxGridViewMLObserver::HandleItemRemovedL( TInt aStartIndex, 

        TInt aEndIndex, MGlxMediaList* aList )

    {

    TRACER("CGlxGridViewMLObserver::HandleItemRemovedL()");

    if (iHgGrid)

        {

        TInt mediaCount = aList->Count();   

        for (TInt i = aEndIndex; i>= aStartIndex; i--)

            {

            iHgGrid->RemoveItem(i);

            }

	    // If the last item is also deleted, this refreshes the view

	    if (mediaCount <=0)

	        {

            if(iMediaList.VisibleWindowIndex() > iMediaList.Count())

                {

                iMediaList.SetVisibleWindowIndexL(0);

                }	        	

			//This is done since the Hg doesnot refresh the screen

			//when we remove all the items from the grid

	        iHgGrid->DrawDeferred(); 

	        iHgGrid->Reset();

			return;

	        }

	    else if (iMediaList.VisibleWindowIndex() > iMediaList.Count())

            {

            iMediaList.SetVisibleWindowIndexL(iMediaList.Count()-1);

            }

        iHgGrid->RefreshScreen(iHgGrid->FirstIndexOnScreen()); 			

        }

    }

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

// HandleAttributesAvailableL

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

//  

void CGlxGridViewMLObserver::HandleAttributesAvailableL( TInt aItemIndex, 

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

    {

    TRACER("CGlxGridViewMLObserver::HandleAttributesAvailableL()");

    GLX_LOG_INFO1("CGlxGridViewMLObserver::HandleAttributesAvailableL "

                                               "aItemIndex(%d)", aItemIndex);

    if (!iHgGrid)

        {

        return;

        }

    TInt mediaCount = iMediaList.Count();

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

    TIdentityRelation< TMPXAttribute > match ( &TMPXAttribute::Match );

    if (KErrNotFound != aAttributes.Find( iQualityTnAttrib, match ) ||

        KErrNotFound != aAttributes.Find( iSpeedTnAttrib, match ))

        {

        TFileName resFile(KDC_APP_BITMAP_DIR);

        resFile.Append(KGlxIconsFilename);

        TSize setSize = CHgGrid::PreferredImageSize();

        TIconInfo icon;

        const CGlxThumbnailAttribute* qualityTn = item.ThumbnailAttribute(

                                                          iQualityTnAttrib );

        const CGlxThumbnailAttribute* speedTn = item.ThumbnailAttribute(

                                                            iSpeedTnAttrib );

        TInt tnError = GlxErrorManager::HasAttributeErrorL(

                          item.Properties(), KGlxMediaIdThumbnail );

        if (qualityTn)

            {

            CFbsBitmap* bitmap = new (ELeave) CFbsBitmap;

            bitmap->Duplicate( qualityTn->iBitmap->Handle());

            AknIconUtils::SetSize(bitmap, setSize);

            iHgGrid->ItemL(aItemIndex).SetIcon(CGulIcon::NewL(bitmap));

            GLX_LOG_INFO1("### CGlxGridViewMLObserver::HandleAttributesAvailableL"

                    " qualityTn-Index is %d",aItemIndex);

            }

        else if (speedTn)

            {

            CFbsBitmap* bitmap = new (ELeave) CFbsBitmap;

            bitmap->Duplicate( speedTn->iBitmap->Handle());

            AknIconUtils::SetSize(bitmap, setSize);

            iHgGrid->ItemL(aItemIndex).SetIcon(CGulIcon::NewL(bitmap));

            GLX_LOG_INFO1("### CGlxGridViewMLObserver::HandleAttributesAvailableL"

                    " speedTn-Index is %d",aItemIndex);

            }

        else if ( KErrNone != tnError && KErrNotSupported != tnError &&

                            KErrArgument != tnError )

            {

            CFbsBitmap* bitmap = AknIconUtils::CreateIconL(resFile,

                                 EMbmGlxiconsQgn_prop_image_corrupted);

            AknIconUtils::SetSize(bitmap, setSize);

            iHgGrid->ItemL(aItemIndex).SetIcon(CGulIcon::NewL(bitmap));

            }

        }

    //Now Update the items with the DRM/video icon and  date/time 

    UpdateItemsL(aItemIndex,aAttributes);

    //Now refresh the screen based on the attributes available index

    RefreshScreen(aItemIndex,aAttributes);

    }

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

// HandleFocusChangedL

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

//  

void CGlxGridViewMLObserver::HandleFocusChangedL( NGlxListDefs::

    TFocusChangeType /*aType*/, TInt aNewIndex, TInt /*aOldIndex*/, 

    MGlxMediaList* /*aList*/ )

    {

    TRACER("CGlxGridViewMLObserver::HandleFocusChangedL()");

    iHgGrid->SetSelectedIndex(aNewIndex);

    iHgGrid->RefreshScreen(aNewIndex); 

/*    if (aList->Count())

        {

        //  This us to set the context to HG Teleport

        TGlxMedia item = iMediaList.Item( aNewIndex );

        iContextUtility->PublishPhotoContextL(item.Uri());

        }*/

    }

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

// HandleItemSelected

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

//  

void CGlxGridViewMLObserver::HandleItemSelectedL(TInt /*aIndex*/, 

    TBool /*aSelected*/, MGlxMediaList* /*aList*/ )

    {

    }

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

// HandleMessageL

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

//    

 void CGlxGridViewMLObserver::HandleMessageL( const CMPXMessage& /*aMessage*/, 

    MGlxMediaList* /*aList*/ )

    {

    TRACER("CGlxGridViewMLObserver::HandleMessageL()");

    }

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

// HandleError

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

//

void CGlxGridViewMLObserver::HandleError( TInt /*aError*/ ) 

    {

    TRACER("CGlxGridViewMLObserver::HandleError()");

    TRAP_IGNORE(HandleErrorL());

    }

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

// HandleErrorL

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

//

void CGlxGridViewMLObserver::HandleErrorL()

    {

    TRACER("CGlxGridViewMLObserver::HandleErrorL()");

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

        {

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

        TInt thumbnailError = GlxErrorManager::HasAttributeErrorL(

                item.Properties(), KGlxMediaIdThumbnail );

            TFileName resFile(KDC_APP_BITMAP_DIR);

            resFile.Append(KGlxIconsFilename);

            AknIconUtils::SetSize(bitmap, CHgGrid::PreferredImageSize() );

            }

        }

    iHgGrid->RefreshScreen(iHgGrid->FirstIndexOnScreen());    

    }

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

// HandleCommandCompleteL

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

//  

void CGlxGridViewMLObserver::HandleCommandCompleteL( CMPXCommand* /*aCommandResult*/, 

    TInt /*aError*/, MGlxMediaList* /*aList*/ )

    {

    TRACER("CGlxGridViewMLObserver::HandleCommandCompleteL()");

    }

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

// HandleMediaL

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

//  

void CGlxGridViewMLObserver::HandleMediaL( TInt /*aListIndex*/, MGlxMediaList* /*aList*/ )

    {

    TRACER("CGlxGridViewMLObserver::HandleMediaL()");

    }

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

// HandlePopulatedL

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

//

void CGlxGridViewMLObserver::HandlePopulatedL( MGlxMediaList* /*aList*/ )

    {

    TRACER("CGlxGridViewMLObserver::HandlePopulatedL()");

    if (iHgGrid)

        {

        // Setting the Empty Text

        HBufC* emptyText = 

                  StringLoader::LoadLC(R_GRID_EMPTY_VIEW_TEXT);

        iHgGrid->SetEmptyTextL(*emptyText);

        CleanupStack::PopAndDestroy(emptyText);

        GLX_DEBUG2("GridMLObserver::HandlePopulatedL() iMediaList.Count()=%d",

                                                          iMediaList.Count());

        if (iMediaList.Count() <= 0)

            {

            GLX_DEBUG1("GridMLObserver::HandlePopulatedL() - SetEmptyTextL()");

            iHgGrid->DrawNow();

            }

        }

    }

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

// HandleItemModifiedL

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

//  

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

    MGlxMediaList* /*aList*/)

    {

    TRACER("CGlxGridViewMLObserver::HandleItemModifiedL()");

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

        {

        TInt modifiedIndex = aItemIndexes[index];

        iModifiedIndexes.AppendL(modifiedIndex);

        }  

    }

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

// HasRelevantThumbnailAttribute

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

//

TBool CGlxGridViewMLObserver::HasRelevantThumbnail(TInt aIndex)

    {

    TRACER("CGlxGridViewMLObserver::HasRelevantThumbnail()");

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

    const CGlxThumbnailAttribute* qualityTn = item.ThumbnailAttribute(

                                                      iQualityTnAttrib );

    const CGlxThumbnailAttribute* speedTn = item.ThumbnailAttribute(

                                                       iSpeedTnAttrib );

    if ( qualityTn || speedTn )

        {

        GLX_DEBUG1("GridMLObserver::HasRelevantThumbnail() - TN avail");                 

        return ETrue;

        }

    return EFalse;

    }

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

// RefreshScreen

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

// 

void CGlxGridViewMLObserver::RefreshScreen(TInt aItemIndex,

                                      const RArray<TMPXAttribute>& aAttributes)

    {

    TInt mediaCount = iMediaList.Count();

    TInt firstIndex = iHgGrid->FirstIndexOnScreen();

    firstIndex = (firstIndex<0 ? 0 : firstIndex);

    TInt lastOnScreen = firstIndex + iHgGrid->ItemsOnScreen() - 1;

    lastOnScreen = (lastOnScreen >mediaCount-1? mediaCount-1:lastOnScreen);

    if (mediaCount < iItemsPerPage || aItemIndex == firstIndex)

        {

        if (aItemIndex == firstIndex && HasRelevantThumbnail(firstIndex))

            {

            GLX_DEBUG2("## GridMLObserver::HandleAttributesAvailableL()"

                     " RefreshScreen - firstIndex(%d)", firstIndex);

            iHgGrid->RefreshScreen(firstIndex);

            }

        else if (aItemIndex > firstIndex && aItemIndex <= lastOnScreen)

            {

            if ( HasRelevantThumbnail(lastOnScreen) )

                {

                GLX_DEBUG2("GridMLObserver::HandleAttributesAvailableL()"

                        " RefreshScreen - aItemIndex(%d)", aItemIndex);					

                iHgGrid->RefreshScreen(aItemIndex);

                }

            }

        }

    else if (aItemIndex > firstIndex && aItemIndex <= lastOnScreen)

        {

        TIdentityRelation< TMPXAttribute > match ( &TMPXAttribute::Match );

        if (KErrNotFound != aAttributes.Find(iQualityTnAttrib, match) ||

            KErrNotFound != aAttributes.Find(iSpeedTnAttrib, match) )

            {

            if ( HasRelevantThumbnail(firstIndex) )

                {

                if ( HasRelevantThumbnail(lastOnScreen) )

                    {

                    GLX_DEBUG2("GridMLObserver::HandleAttributesAvailableL()"

                        " RefreshScreen - aItemIndex(%d)", aItemIndex);					

                    iHgGrid->RefreshScreen(aItemIndex);

                    }

                else if (aItemIndex == lastOnScreen)

                    {

                    GLX_DEBUG2("GridMLObserver::HandleAttributesAvailableL()"

                           " RefreshScreen - lastOnScreen(%d)", lastOnScreen); 

                    iHgGrid->RefreshScreen(lastOnScreen);

                    }

                }

            }

        }

    if (iModifiedIndexes.Count() > 0)        

        {

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

            {

            if (iModifiedIndexes[index] == aItemIndex && 

			                     HasRelevantThumbnail(aItemIndex))

                {

                GLX_DEBUG2("GridMLObserver::HandleAttributesAvailableL()"

                           " RefreshScreen - modified index(%d)", aItemIndex);

                iHgGrid->RefreshScreen(aItemIndex);

                iModifiedIndexes.Remove(index);

                iModifiedIndexes.Compress();

                }

            }

        }

    }

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

// UpdateItemsL

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