/*

* 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:    Media List View Base

*

*/

#include "glxmedialistviewbase.h"

#include <mpxcollectionutility.h>

#include <glxcommandhandler.h>

#include <glxassert.h>

#include <glxgallery.hrh>

#include <glxattributecontext.h>

#include <glxuistd.h>

#include <glxfetchcontextremover.h>

#include <glxcommandhandlers.hrh>

#include <AknUtils.h>

#include <glxtracer.h>                         // For Logs

#include <glxattributeretriever.h>

#include "glxtitlefetcher.h"

#include "glxmedialistfactory.h"

#include "mglxmedialist.h"

 _LIT(KBlankTitle,"    ");

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

// Constructor

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

//	

EXPORT_C CGlxMediaListViewBase::CGlxMediaListViewBase()

    {

    }

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

// MLViewBaseConstructL

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

//	

EXPORT_C void CGlxMediaListViewBase::MLViewBaseConstructL(

        MGlxMediaListFactory* aMediaListFactory, 

        const TDesC& aTitle,TBool aEnableMiddleSoftkey)

    {

    iMediaListFactory = aMediaListFactory;

    iCollectionUtility = MMPXCollectionUtility::NewL(NULL, KMcModeDefault);

    iEnableMidddleSoftkey = aEnableMiddleSoftkey; 

    iSelectionIterator.SetRange(KMaxTInt);

    iPreloadContextForCommandHandlers  = new (ELeave) CGlxAttributeContext(&iSelectionIterator);

    if(aTitle.Length() > 0)

        {

        iFixedTitle = aTitle.AllocL();

        }

    if(iUiUtility->IsPenSupported())

        {

        // Responsible for controlling the ui states of toolbar

        // Create ToolbarController only for touch supported devices.

           iToolbarControl = CGlxToolbarController::NewL();

        }

    else

        {

        // Responsible for controlling the middle softkey if enabled.

        // Create Middle Softkey Controller only for non-touch devices

            iCbaControl = CGlxMSKController::NewL();

        }   

    }

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

// Destructor

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

//	

EXPORT_C CGlxMediaListViewBase::~CGlxMediaListViewBase()

    {

    CloseMediaList();

    if ( iCollectionUtility )

        {

        iCollectionUtility->Close();

        }

    delete iFixedTitle;

    delete iTitleFetcher;

    delete iPreloadContextForCommandHandlers;

    if( iCbaControl )

        {

        delete iCbaControl;                                          

        }

    if( iToolbarControl )

        {

        delete iToolbarControl;        

        }    

    }

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

// MediaList

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

//	

EXPORT_C MGlxMediaList& CGlxMediaListViewBase::MediaList()

    {

    GLX_ASSERT_ALWAYS( iMediaList, Panic( EGlxPanicNullMediaList ),

                       "Media list has been closed" );

    return *iMediaList;

    }

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

// DoViewActivateL

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

//	

EXPORT_C void CGlxMediaListViewBase::DoViewActivateL(

        const TVwsViewId& aPrevViewId, TUid aCustomMessageId, 

        const TDesC8& aCustomMessage)

    {

    TRACER ("CGlxMediaListViewBase::DoViewActivateL()");

    iUiUtility->SetAppOrientationL( EGlxOrientationDefault );	

    if ( iMediaList )

        {

        // may need to refresh the media list if it has got out of sync

        // with the current navigational state, e.g. when jumping back two views

        // instead of just one, the intermediate view's media list will not have

        // been closed so if that view is subsequently re-opened its media list

        // could contain out of date items

        CMPXCollectionPath* path = iMediaList->PathLC();

        // current navigational state

        CMPXCollectionPath* navigationalState = 

            iCollectionUtility->Collection().PathL();

        CleanupStack::PushL( navigationalState );

        // current node id in UI Hierarchy

        TMPXItemId navStateNodeId = 

            navigationalState->Id( navigationalState->Levels() - 2 );

        // current media list's node id in UI hierarchy

        TMPXItemId mediaListNodeId = path->Id( path->Levels() - 2 );

        if ( mediaListNodeId != navStateNodeId )

            {

            // the node ids are out of synch so close the media list

            // for it to be recreated later on

            CloseMediaList();

            }

        CleanupStack::PopAndDestroy( navigationalState );

        CleanupStack::PopAndDestroy( path );        

        }

    if (!iMediaList && iMediaListFactory)

        {

        iMediaList = &iMediaListFactory->CreateMediaListL(*iCollectionUtility);

    	iMediaList->AddContextL(iPreloadContextForCommandHandlers, 0);

        }

    if(iFixedTitle)

        {

        // If there is a fixed title, set it

        SetTitleL(*iFixedTitle);

        }

    else

        {

        // else obtain a title from the media list

        // First set a blank title to claim the title space

        SetTitleL(KBlankTitle);

        CMPXCollectionPath* path = iMediaList->PathLC( NGlxListDefs::EPathParent );

        iTitleFetcher = CGlxTitleFetcher::NewL(*this, path);

        CleanupStack::PopAndDestroy(path);

        }

    //Allow the MskController to observe medialist everytime a view with a valid

    //medialist becomes active

    if( iCbaControl && iMediaList && Cba()&& iEnableMidddleSoftkey )

        {

        CMPXCollectionPath* navigationalState = iCollectionUtility->Collection().PathL();

        CleanupStack::PushL(navigationalState);

        iCbaControl->AddToObserverL(*iMediaList,Cba()); 

        if(!(1 == navigationalState->Levels())) // Checking for the main list view

          {

            iCbaControl->SetStatusOnViewActivationL(iMediaList);

            }

        else

            {

            iCbaControl->SetMainStatusL();

            }

        CleanupStack::PopAndDestroy(navigationalState);

        }

    //Allow the toolbarController to observe medialist everytime a view with a valid

    //medialist becomes active

    if( Toolbar() && iToolbarControl )

        {

        iToolbarControl->AddToObserverL(*iMediaList, Toolbar());

        iToolbarControl->SetStatusOnViewActivationL(iMediaList);

        }    

    DoMLViewActivateL(aPrevViewId, aCustomMessageId, aCustomMessage);

    }

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

// DoViewDeactivate

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

//	

EXPORT_C void CGlxMediaListViewBase::DoViewDeactivate()

    {

    DoMLViewDeactivate();

    if( iCbaControl && iMediaList && Cba() )

        {

        //Remove Mskcontroller from medialist observer

        iCbaControl->RemoveFromObserver(*iMediaList);

        }

    if( Toolbar() && iToolbarControl )

        {

        //Remove Toolbarcontroller from medialist observer

        iToolbarControl->RemoveFromObserver(*iMediaList);

        }    

    // Only close the medialist if navigating backwards

    if ( iUiUtility->ViewNavigationDirection() == EGlxNavigationBackwards )

        {

        CloseMediaList();

        }

    delete iTitleFetcher;

    iTitleFetcher = NULL;

    }

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

// CGlxMediaListViewBase::FetchAttributesL

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

//	

EXPORT_C void CGlxMediaListViewBase::FetchAttributesL()

	{

	FetchAttributesL(EFalse);

	}

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

// CGlxMediaListViewBase::FetchAttributesForCommandL

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

//	

EXPORT_C void CGlxMediaListViewBase::FetchAttributesForCommandL(TInt aCommand)

	{

	FetchAttributesL(ETrue, aCommand);

	}

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

// SetToolbarStateL

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

//

EXPORT_C void CGlxMediaListViewBase::SetToolbarStateL()

    {

    TRACER("CGlxMediaListViewBase::SetToolbarStateL");

    if( iToolbarControl && iMediaList )

        {

        iToolbarControl->SetStatusL(iMediaList);

        }

    }

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

// CGlxMediaListViewBase::FetchAttributesL

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

//	

void CGlxMediaListViewBase::FetchAttributesL(TBool aFilterUsingCommandId, 

		                                                   TInt aCommandId)

	{

	TRACER("CGlxMediaListViewBase::FetchAttributesL");

    TGlxSelectionIterator iterator;

    CGlxAttributeContext* attributeContext = new(ELeave) CGlxAttributeContext(&iterator);

    CleanupStack::PushL(attributeContext);

	TInt commandHandlerCount = iCommandHandlerList.Count();

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

		{

		AddAttributesToContextL(*attributeContext, iCommandHandlerList[i], ETrue, aFilterUsingCommandId, aCommandId);

		}

	if (attributeContext->AttributeCount())

		{

		// Check if media attributes are already fetched.

		// If media item is NULL, Cancel the previous pending request

		MediaList().CancelPreviousRequests();

	    MediaList().AddContextL(attributeContext, KGlxFetchContextPriorityCommandHandlerOpening );

    	// TGlxContextRemover will remove the context when it goes out of scope

    	// Used here to avoid a trap and still have safe cleanup

	    	TGlxFetchContextRemover contextRemover(attributeContext, MediaList());

        // put to cleanupstack as cleanupstack is emptied before stack objects

        // are deleted

        CleanupClosePushL( contextRemover );

        // retrieve attributes, ignore return value

    	(void)GlxAttributeRetriever::RetrieveL(*attributeContext, MediaList(), ETrue);

        // context off the list

        CleanupStack::PopAndDestroy( &contextRemover );

		}

	CleanupStack::PopAndDestroy(attributeContext);

	}

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

// HandleTitleAvailableL

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

//	

EXPORT_C void CGlxMediaListViewBase::HandleTitleAvailableL(

        const TDesC& aTitle)

    {

	 // Convertion of unsigned short  to unsigned int  

    TUint16* tileConv = const_cast<TUint16*>(aTitle.Ptr());

	TInt titleLen = aTitle.Length();

	TPtr titlePtr(tileConv,titleLen,titleLen);

	//to convert between arabic-indic digits and european digits.

	//based on existing language setting.

    AknTextUtils::LanguageSpecificNumberConversion(titlePtr);

    // Set a title after it has been obtained by the title fetcher

    SetTitleL(aTitle);

    }

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

// CGlxMediaListViewBase::DoPrepareCommandHandlerL

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

//

EXPORT_C void CGlxMediaListViewBase::DoPrepareCommandHandlerL(

											CGlxCommandHandler* aCommandHandler)

	{

	AddAttributesToContextL(*iPreloadContextForCommandHandlers, 

			                                            aCommandHandler, EFalse, EFalse);

	}

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

// CGlxMediaListViewBase::CloseMediaList

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

//

void CGlxMediaListViewBase::CloseMediaList()

	{

    if (iMediaList)

        {

        iMediaList->RemoveContext(iPreloadContextForCommandHandlers);

        iMediaList->Close();

        iMediaList = NULL;

        }

	}

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

// CGlxMediaListViewBase::AddAttributesToContextL

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

//

void CGlxMediaListViewBase::AddAttributesToContextL(

								 CGlxAttributeContext& aAttributeContext, 

			                     CGlxCommandHandler* aCommandHandler, 

			                     TBool aFilterUsingSelection, 

			                     TBool aFilterUsingCommandId, 

			                     TInt aCommandId)

    {

	RArray<TMPXAttribute> requiredAttributes;

	CleanupClosePushL(requiredAttributes); 

	aCommandHandler->

	GetRequiredAttributesL(requiredAttributes, aFilterUsingSelection, aFilterUsingCommandId, aCommandId); 

	TInt attributeCount = requiredAttributes.Count();

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

		{

		aAttributeContext.AddAttributeL(requiredAttributes[i]);

		}

	CleanupStack::PopAndDestroy(&requiredAttributes);

	}

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

// HandleViewCommandL

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

//	

EXPORT_C TBool CGlxMediaListViewBase::HandleViewCommandL(TInt /*aCommand*/)

	{

	return EFalse;

	}

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

// DoHandleCommandL

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

//

EXPORT_C TInt CGlxMediaListViewBase::DoHandleCommandL(TInt aCommand)

    {

    // Pass the command to the deriving class

    return HandleViewCommandL( aCommand );

    }