/*

* Copyright (c) 2006-2007 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:  Task for generating new thumbnails

 *

*/

#include <e32base.h>

#include <fbs.h>

#include <thumbnailmanager.h>

#include "thumbnailgeneratetask.h"

#include "thumbnailscaletask.h"

#include "thumbnailprovider.h"

#include "thumbnailserver.h"

#include "thumbnailtaskprocessor.h"

#include "thumbnailmanagerconstants.h"

#include "thumbnaillog.h"

#include "thumbnailpanic.h"

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

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

// CThumbnailGenerateTask::CThumbnailGenerateTask()

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

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

//

CThumbnailGenerateTask::CThumbnailGenerateTask( CThumbnailTaskProcessor&

    aProcessor, CThumbnailServer& aServer, RFile64* aFile, TDesC8* aBuffer,

    const TDataType* aMimeType, CThumbnailManager::TThumbnailFlags aFlags,

    const TSize& aSize, TDisplayMode aDisplayMode, TInt aPriority,

    RArray < TThumbnailPersistentSize >* aMissingSizes, const TDesC& aTargetUri,

    TThumbnailSize aThumbnailSize, const TThumbnailId aThumbnailId, 

    const CThumbnailManager::TThumbnailQualityPreference aQualityPreference ): 

    CThumbnailTask( aProcessor, aPriority ), iServer( aServer ), 

    iFlags( aFlags ), iSize( aSize ), iDisplayMode( aDisplayMode ),

    iMissingSizes( aMissingSizes ), iTargetUri( aTargetUri ),

    iThumbnailSize( aThumbnailSize ), iThumbnailId(aThumbnailId),

    iQualityPreference( aQualityPreference )

    {

    TN_DEBUG2( "CThumbnailGenerateTask(0x%08x)::CThumbnailGenerateTask()", this);

    if ( !aBuffer && aFile)

        {

        iFile = *aFile; 

        iFile.FullName( iFilename );

        }

    else if( aBuffer )

        {

        iBuffer = aBuffer;

        }

    if ( aMimeType )

        {

        iMimeType = *aMimeType;

        }

    else

        {

        iMimeType = TDataType(KNullDesC8);

        }

    // scaled bitmaps to pool by default

    iScaledBitmapToPool = ETrue;

    }

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

// CThumbnailGenerateTask::~CThumbnailGenerateTask()

// Destructor.

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

//

CThumbnailGenerateTask::~CThumbnailGenerateTask()

    {

    TN_DEBUG2("CThumbnailGenerateTask(0x%08x)::~CThumbnailGenerateTask()", this);

    if ( iProvider )

        {

        iProvider->CancelGetThumbnail();

        }

    if ( iMissingSizes )

        {

        iMissingSizes->Reset();

        delete iMissingSizes;

        }

    if ( iBitmap )

        {

        iServer.DeleteBitmapFromPool( iBitmap->Handle());

        iBitmap = NULL;

        }

    iProvider = NULL;

    delete iBuffer;

    iBuffer = NULL;

    iFile.Close();

    TN_DEBUG1("CThumbnailGenerateTask::~CThumbnailGenerateTask() - file handle closed");

    }

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

// CThumbnailGenerateTask::StartL()

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

//

void CThumbnailGenerateTask::StartL()

    {

    TN_DEBUG2( "CThumbnailGenerateTask(0x%08x)::StartL()", this );

    CThumbnailTask::StartL();

#ifdef _DEBUG

    aStart.UniversalTime();

#endif

    TParsePtrC parse(iFilename);

    TPtrC ext(parse.Ext());

    TBuf8< KMaxDataTypeLength > mimeType;                

    if  (ext.CompareF(KNonEmbeddedArtExt)== 0) 

        {       

        mimeType.Copy( KImageMime );  		

        }

    else

        {

        mimeType = iMimeType.Des8();

        }

    iProvider = iServer.ResolveProviderL(mimeType);

    TN_DEBUG3( "CThumbnailGenerateTask(0x%08x) -- provider UID 0x%08x", this,

        iProvider->Uid());

    __ASSERT_DEBUG(( iProvider ), ThumbnailPanic( EThumbnailNullPointer ));

    iProvider->CancelGetThumbnail();

    iProvider->Reset();

    iProvider->SetObserver( *this );

    TSize effectiveTargetSize;

    TSize croppedTargetSize;

    CalculateTargetSizesL( effectiveTargetSize, croppedTargetSize );

    iProvider->SetTargetSize( effectiveTargetSize );

    if(effectiveTargetSize == TSize())

        {

        iProvider->SetTargetSize( croppedTargetSize );

        }

    if ( !iBuffer )

        {

        iProvider->GetThumbnailL( iServer.Fs(), iFile, iMimeType, iFlags,

            iDisplayMode, iQualityPreference );

        }

    else

        {

        iProvider->GetThumbnailL( iServer.Fs(), iBuffer, iMimeType, iFlags,

            iDisplayMode, iQualityPreference );

        }

    }

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

// CThumbnailGenerateTask::RunL()

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

//

void CThumbnailGenerateTask::RunL()

    {

    // No implementation required

    }

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

// CThumbnailGenerateTask::DoCancel()

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

//

void CThumbnailGenerateTask::DoCancel()

    {

    TN_DEBUG2( "CThumbnailGenerateTask(0x%08x)::DoCancel()", this );

    if ( iProvider )

        {

        iProvider->CancelGetThumbnail();

        }

    }

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

// Calculate the largest non-cropped size and largest cropped size and

// let the provider plug-in know the values

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

//

void CThumbnailGenerateTask::CalculateTargetSizesL( TSize& aEffectiveTargetSize,

    TSize& aCroppedTargetSize )

    { 

    if ( iThumbnailSize == ECustomThumbnailSize )

        {

        if ( iFlags& CThumbnailManager::ECropToAspectRatio )

            {

            aCroppedTargetSize = iSize;

            }

        else

            {

            aEffectiveTargetSize = iSize;

            }       

        }

    if ( iThumbnailSize != ECustomThumbnailSize )

        {

        RArray < TThumbnailPersistentSize > sizes = iServer.PersistentSizesL();

        const TInt count = sizes.Count();

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

            {

            TThumbnailPersistentSize size( sizes[i] );     

            iSize = size.iSize;

            if ( size.iCrop )

               {

               aCroppedTargetSize.iWidth = Max( aCroppedTargetSize.iWidth,

                   size.iSize.iWidth );

               aCroppedTargetSize.iHeight = Max( aCroppedTargetSize.iHeight,

                   size.iSize.iHeight );

               if(iBuffer)

                 {

                 iFlags = ( CThumbnailManager::TThumbnailFlags ) (iFlags | CThumbnailManager::ECropToAspectRatio);

                 aEffectiveTargetSize = aCroppedTargetSize;

                 }

               }

            else

               {

                aEffectiveTargetSize.iWidth = Max( aEffectiveTargetSize.iWidth,

                   size.iSize.iWidth );

                aEffectiveTargetSize.iHeight = Max( aEffectiveTargetSize.iHeight,

                   size.iSize.iHeight );

               }

            if(size.iType == iThumbnailSize)

              {

              break;

              }     

            }

        }    

    }

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

// Thumbnail provider observer callback to notify the server when

// thumbnail has been generated.

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

//

void CThumbnailGenerateTask::ThumbnailProviderReady( const TInt aError,

    CFbsBitmap* aBitmap, const TSize& aOriginalSize, const TBool aEXIF, const TBool aPortrait )

    {

    TN_DEBUG4( 

        "CThumbnailGenerateTask(0x%08x)::ThumbnailProviderReady(aError=%d, aBitmap=0x%08x)", this, aError, aBitmap );

    #ifdef _DEBUG

    aStop.UniversalTime();

    TN_DEBUG2( "CThumbnailGenerateTask::ThumbnailProviderReady() generate took %d ms", (TInt)aStop.MicroSecondsFrom(aStart).Int64()/1000);

    #endif

    iPortrait = aPortrait;

    iEXIF = aEXIF;

    iOriginalSize = aOriginalSize;

    if ( aError )

        {

        delete aBitmap;

        aBitmap = NULL;

        // Create a temporary bitmap of size 1 for storing blacklisted thumbnail

        // Because no actual bitmap data is generated, there is no reason to 

        // add bitmap to server bitmap pool. Completion of client request with

        // error code just results in applications showing their default bitmap. 

        if( iFilename != KNullDesC || iTargetUri != KNullDesC )

            {

            if ( aError == KErrNotSupported ||

                    aError == KErrCorrupt ||

                    aError == KErrCompletion)

                {

                TRAPD( err, CreateBlackListedL( aOriginalSize ) );

                if (err != KErrNone)

                    {

                    TN_DEBUG2( "CThumbnailGenerateTask::ThumbnailProviderReady() - blacklisting failed with code %d", err );

                    }

                }

            }

        Complete( aError );

        }

    else

        {

        // CreateScaleTasksL will take ownership of bitmap

#ifdef _DEBUG

        TN_DEBUG2( "CThumbnailGenerateTask::ThumbnailProviderReady() - displaymode is %d", aBitmap->DisplayMode());

#endif

        TRAPD( err, CreateScaleTasksL( aBitmap ));

        aBitmap = NULL;

        // If CreateScaleTasksL left, we are responsible for completing

        // the RMessage. If there was no leave, then this call will not

        // complete actual the message, just the mark the task as completed.

        Complete( err );

        }

    }

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

// Create tasks to scale the thumbnail to each persistent thumbnail size

// and also to the size the client requested

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

//

void CThumbnailGenerateTask::CreateScaleTasksL( CFbsBitmap* aBitmap )

    {

    __ASSERT_DEBUG(( aBitmap ), ThumbnailPanic( EThumbnailNullPointer ));

    CleanupStack::PushL( aBitmap );

    iServer.AddBitmapToPoolL( iRequestId.iSession, aBitmap );

    // Keep pointer so we can delete bitmap from pool

    iBitmap = aBitmap;

    CleanupStack::Pop( aBitmap );

    // compTask is the scale task which returns the bitmap to the client

    CThumbnailScaleTask* complTask = NULL;

    if ( iMissingSizes )

        {

        const TInt count = iMissingSizes->Count();

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

            {

            TThumbnailSize size = (*iMissingSizes)[ i ].iType;

#ifdef _DEBUG

            TN_DEBUG3( "CThumbnailGenerateTask(0x%08x)::CreateScaleTasksL() *iMissingSizes)[ i ].iType == %d", this, size );

#endif

            if ( iPortrait )

                {

                if ( size == EFullScreenThumbnailSize ||

                     size == EVideoFullScreenThumbnailSize ||

                     size == EAudioFullScreenThumbnailSize ||

                     size == EImageFullScreenThumbnailSize )

                    {

                    TN_DEBUG2( "*iMissingSizes)[ i ].iWidth == %d", (*iMissingSizes)[ i ].iSize.iWidth );

                    TN_DEBUG2( "*iMissingSizes)[ i ].iHeight == %d", (*iMissingSizes)[ i ].iSize.iHeight );

                    TInt width = (*iMissingSizes)[ i ].iSize.iWidth; 

                    (*iMissingSizes)[ i ].iSize.iWidth = (*iMissingSizes)[ i ].iSize.iHeight;

                    (*iMissingSizes)[ i ].iSize.iHeight = width;

                    TN_DEBUG2( "*iMissingSizes)[ i ].iWidth == %d", (*iMissingSizes)[ i ].iSize.iWidth );

                    TN_DEBUG2( "*iMissingSizes)[ i ].iHeight == %d", (*iMissingSizes)[ i ].iSize.iHeight );

                    }

                }

            CThumbnailScaleTask* scaleTask = CThumbnailScaleTask::NewL( iProcessor, iServer, iFilename,

                iBitmap, iOriginalSize, (*iMissingSizes)[ i ].iSize, (*iMissingSizes)[ i ].iCrop, iDisplayMode,

                KMaxPriority, iTargetUri, (*iMissingSizes)[ i ].iType, iThumbnailId, iScaledBitmapToPool, iEXIF );

            CleanupStack::PushL( scaleTask );

            TInt err1 = KErrNone;

            TInt err2 = KErrNone;

            if(iFilename != KNullDesC)

                {

                TRAP(err1, iServer.StoreForPathL(iFilename));

                }

            if(iTargetUri != KNullDesC)

                {

                TRAP(err2, iServer.StoreForPathL(iTargetUri));

                }

            // if trying to access Z drive, don't try to store

            // don't want to store custom sizes

            if( err1 == KErrAccessDenied || err2 == KErrAccessDenied ||

                    (*iMissingSizes)[ i ].iType == ECustomThumbnailSize )

                {

                scaleTask->SetDoStore( EFalse );

                }

            else

                {

                scaleTask->SetDoStore( ETrue );

                }

            iProcessor.AddTaskL( scaleTask );

            CleanupStack::Pop( scaleTask );

            // completion to first task, because task processor works like stack

            if( i == 0 )

                {

                // compTask is now responsible for completing the RMessage

                scaleTask->SetMessageData( iRequestId, iMessage );

                ResetMessageData();

                }

            }

        }

    else

        {

        if( iPortrait )

            {

            if ( iThumbnailSize == EFullScreenThumbnailSize ||

                 iThumbnailSize == EVideoFullScreenThumbnailSize ||

                 iThumbnailSize == EAudioFullScreenThumbnailSize ||

                 iThumbnailSize == EImageFullScreenThumbnailSize )

                      {

                      TInt width = iSize.iWidth; 

                      iSize.iWidth = iSize.iHeight;

                      iSize.iHeight = width;

                      }

            }

        complTask = CThumbnailScaleTask::NewL( iProcessor, iServer, iFilename,

            iBitmap, iOriginalSize, iSize, iFlags& CThumbnailManager

            ::ECropToAspectRatio, iDisplayMode, KMaxPriority, iTargetUri,

            iThumbnailSize, iThumbnailId, iScaledBitmapToPool, iEXIF );

        CleanupStack::PushL( complTask );

        TInt err1 = KErrNone;

        TInt err2 = KErrNone;

        if(iFilename != KNullDesC)

            {

            TRAP(err1, iServer.StoreForPathL(iFilename));

            }

        if(iTargetUri != KNullDesC)

            {

            TRAP(err2, iServer.StoreForPathL(iTargetUri));

            }

        // if trying to access Z drive, don't try to store

        // don't want to store custom sizes

        if( err1 == KErrAccessDenied || err2 == KErrAccessDenied ||

            iThumbnailSize == ECustomThumbnailSize )

            {

            complTask->SetDoStore( EFalse );

            }

        else

            {

            complTask->SetDoStore( ETrue );

            }

        iProcessor.AddTaskL( complTask );

        CleanupStack::Pop( complTask );

        // compTask is now responsible for completing the RMessage and

        // returning the bitmap to the client

        complTask->SetMessageData( iRequestId, iMessage );

        ResetMessageData();

        }

    // Scale tasks now reference the bitmap in the pool

    iServer.DeleteBitmapFromPool( iBitmap->Handle());

    iBitmap = NULL;

    }

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

// Defines if scaled bitmaps need to be added to pool

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

//

void CThumbnailGenerateTask::ScaledBitmapToPool( TBool aBool )

    {

    iScaledBitmapToPool = aBool;

    }

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

// Stores a blacklisted thumbnail

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

//

void CThumbnailGenerateTask::CreateBlackListedL( const TSize& aOriginalSize )

    {

    CFbsBitmap* tempBitmap = 0;

    tempBitmap = new (ELeave) CFbsBitmap();

    CleanupStack::PushL( tempBitmap );

    TSize tempSize( 1, 1 );

    User::LeaveIfError( tempBitmap->Create( tempSize, iDisplayMode ) );

    // Instead of creating a blacklisted entry of requested size (iThumbnailSize) in thumbnail db,

    // consider blacklisting all sizes (hence the changes are needed in thumbnail fetching logic too).

    // However, decoding of source to thumnail could succeed in other sizes, which makes blacklisting

    // of requested size only meaningful. 

    if(iFilename != KNullDesC)

        {

        iServer.StoreForPathL( iFilename )->StoreThumbnailL( 

            iFilename, tempBitmap, aOriginalSize, EFalse, iThumbnailSize, iThumbnailId, EFalse, ETrue );

        }

    else if(iTargetUri != KNullDesC)

        {

        iServer.StoreForPathL( iTargetUri )->StoreThumbnailL( 

            iTargetUri, tempBitmap, aOriginalSize, EFalse, iThumbnailSize, iThumbnailId, EFalse, ETrue );

        }

    CleanupStack::PopAndDestroy( tempBitmap );

    }