/*

* Copyright (c) 2010 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: Resource loader for About in order to asynchronous load resource.

*

*/

#include "AboutResourceLoader.h"

#include "MResourceLoaderObserver.h"    // For MResourceLoaderObserver

#include "AboutResource.h"              // For CAboutResource

#include <StringLoader.h>               // For StringLoader

#include <eikenv.h>                     // For CEikonEnv

#include <StringLoader.h>               // For StringLoader

#include <f32file.h>

// CONSTANTS

const TInt KDefaultResourceId( -1 ); // Default resource id.

// The count for the resouce that to be loaded in one time.

const TInt KDefaultItemLoadingCount( 10 );

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

// CAboutResourceLoader::CAboutResourceLoader()

//

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

CAboutResourceLoader::CAboutResourceLoader( CEikonEnv* aEikonEnv,

                                    MResourceLoaderObserver* aObserver ) 

                     : CActive( EPriorityLow ),

                       iEnv( aEikonEnv ),

                       iResourceId( KDefaultResourceId ),

                       iObserver( aObserver )

    {

    }

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

// CAboutResourceLoader::NewLC()

//

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

CAboutResourceLoader* CAboutResourceLoader::NewLC( CEikonEnv* aEikonEnv, 

                                        MResourceLoaderObserver* aObserver )

    {

    CAboutResourceLoader* self = new ( ELeave ) CAboutResourceLoader( 

                                                    aEikonEnv, aObserver );

    CleanupStack::PushL(self);

    self->ConstructL();

    return self;

    }

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

// CAboutResourceLoader::NewL()

//

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

CAboutResourceLoader* CAboutResourceLoader::NewL( CEikonEnv* aEikonEnv, 

                                        MResourceLoaderObserver* aObserver )

    {

    CAboutResourceLoader* self = CAboutResourceLoader::NewLC( 

                                            aEikonEnv, aObserver );

    CleanupStack::Pop(); // self;

    return self;

    }

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

// CAboutResourceLoader::ConstructL()

//

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

void CAboutResourceLoader::ConstructL()

    {

    CActiveScheduler::Add(this); // Add to scheduler

    iLoadedItem = new(ELeave) RPointerArray<CAboutResource>();

    iLoader = new(ELeave) RConeResourceLoader( *iEnv );

    }

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

// CAboutResourceLoader::CAboutResourceLoader()

// 

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

CAboutResourceLoader::~CAboutResourceLoader()

    {

    Cancel(); // Cancel any request, if outstanding

    if ( iLoadedItem )

        {

        iLoadedItem->ResetAndDestroy();

        delete iLoadedItem;

        iLoadedItem = NULL;

        }

    if ( iResourceBuffer )

        {

        delete iResourceBuffer;

        iResourceBuffer = NULL;

        }

    if ( iLoader )

        {

        iLoader->Close();

        delete iLoader;

        iLoader = NULL;

        }

    }

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

// CAboutResourceLoader::DoCancel()

// 

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

void CAboutResourceLoader::DoCancel()

    {

    iItemIterator = 0;

    // Delete the resource buffer.

    if ( iResourceBuffer )

        {

        delete iResourceBuffer;

        iResourceBuffer = NULL;

        }

    if ( iLoader )

        {

        iLoader->Close();

        }

    }

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

// CAboutResourceLoader::StartL()

// 

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

void CAboutResourceLoader::StartL()

    {

    // Leave with KErrGeneral if the resource id is not set.

    if ( iResourceId == KDefaultResourceId )

        {

        User::Leave( KErrGeneral );

        }

    Cancel();

    iItemIterator = 0;

    ReleaseLoadedItems();

    if ( !iLoaded )

        {

        // Init the rsc file path

        TFileName filePath( iResourcePath );

        BaflUtils::NearestLanguageFile( iEnv->FsSession(), filePath );

        iLoader->Close();

        iLoader->OpenL( filePath );

        }

    if ( iResourceBuffer )

        {

        delete iResourceBuffer;

        iResourceBuffer = NULL;

        }

    iResourceBuffer = iEnv->AllocReadResourceAsDes8LC( iResourceId );

    iReader.SetBuffer( iResourceBuffer );

    iItemCount = iReader.ReadInt16();

    CleanupStack::Pop(); // iResourceBuffer

    Activate();

    }

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

// CAboutResourceLoader::RunL()

// 

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

void CAboutResourceLoader::RunL()

    {

    TInt err = KErrNone;

    for ( ; iItemIterator < iItemCount; iItemIterator++ )

        {

        CAboutResource* aboutResource = CAboutResource::NewL();

        CleanupStack::PushL( aboutResource );

        TInt type = iReader.ReadInt8();

        // Load Text

        if ( type == EAboutTextItem )

            {

            HBufC* resourceItem( NULL );

            // There are two different text, one is direct output and another needs format

            if ( iReader.ReadInt8() == EAboutUpdateTime )

                {

                // About text needs format

                TTime time;

                time.UniversalTime();

                TDateTime currentTime = time.DateTime();

                resourceItem = StringLoader::LoadLC( iReader.ReadInt32(), 

                                            currentTime.Year(), CEikonEnv::Static() );

                }

            else

                {

                // Direct output about text

                resourceItem = iEnv->AllocReadResourceLC( iReader.ReadInt32() );

                }

            // Set the loaded item

            aboutResource->SetResourceItem( resourceItem );

            // Set the loaded item

            aboutResource->SetResourceIndex( iItemIterator );

            iLoadedItem->AppendL( aboutResource );

            CleanupStack::Pop( 2 ); // resourceItem and aboutResource

            }

        // Load image.

        else if ( type == EAboutImageItem )

            {

            TPtrC imageFile = iReader.ReadTPtrC();

            aboutResource->SetResourceItem( imageFile.AllocL() );

            aboutResource->SetBitmapId( iReader.ReadInt16() );

            aboutResource->SetResourceType( EAboutImageItem );

            iLoadedItem->AppendL( aboutResource );

            CleanupStack::Pop(); // aboutResource

            }

        else

            {

            err = KErrNotSupported;

            CleanupStack::PopAndDestroy(); // aboutResource

            break;

            }

        // Ten items per loading and calculate the number of loaded

        if ( ( iItemIterator % KDefaultItemLoadingCount ) 

                            == ( KDefaultItemLoadingCount - 1 ) )

            {

            // Once the value of iItemIterator > 10, we should break

            iItemIterator++;

            break;

            }

        }

    // Notify observer.

    if ( err == KErrNone && iItemIterator < iItemCount )

        {

        // Ten items loading over, Notify HandleItemsLoadedL observer

        iObserver->HandleItemsLoadedL( err );

        Activate();

        }

    else

        {

        // Once there is not enough ten items, need run this function again

        iObserver->HandleItemsLoadedL( err );

        // One resource loading over, Notify HandleResourceLoadCompletedL observer

        iObserver->HandleResourceLoadCompletedL( iResourceId, err );

        }

    }

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

// CAboutResourceLoader::RunError()

//

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

TInt CAboutResourceLoader::RunError( TInt aError )

    {

    return aError;

    }

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

// CAboutResourceLoader::Activate()

//

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

void CAboutResourceLoader::Activate()

    {

    TRequestStatus* status = &iStatus;

    *status = KRequestPending;

    User::RequestComplete( status, KErrNone );

    SetActive();

    }

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

// CAboutResourceLoader::SetResourceId()

//

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

void CAboutResourceLoader::SetResourceId( const TInt aResourceId, 

                        const TBool aLoaded, const TDesC& aResourcePath )

    {

    iResourceId = aResourceId;

    iLoaded = aLoaded;

    iResourcePath.Copy( aResourcePath );

    }

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

// CAboutResourceLoader::CurrentResourceId()

//

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

TInt CAboutResourceLoader::CurrentResourceId()

    {

    return iResourceId;

    }

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

// CAboutResourceLoader::LoadedResourceItems()

//

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

RPointerArray<CAboutResource>* CAboutResourceLoader::LoadedResourceItems() const

    {

    return iLoadedItem;

    }

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

// CAboutResourceLoader::RleaseLoadedItems()

//

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

void CAboutResourceLoader::ReleaseLoadedItems()

    {

    iLoadedItem->ResetAndDestroy();

    }

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

// CAboutResourceLoader::ItemCount()

//

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

TInt CAboutResourceLoader::ItemCount() const

    {

    return iItemCount;

    }