--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/phoneengine/PhoneCntFinder/src/Misc/CPhCntThumbnailLoaderImpl.cpp	Mon Jan 18 20:18:27 2010 +0200
@@ -0,0 +1,429 @@
+/*
+* Copyright (c) 2002 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:  Thumbnail loading implementation.
+*
+*/
+
+
+// INCLUDE FILES
+#include    "CPhCntThumbnailLoaderImpl.h"
+#include    "MPhoneCntPbkOwner.h"
+#include    "MPhCntThumbnailLoaderObserver.h"
+#include    "cphcntcontactid.h"
+#include    "cphcntpbkcontactid.h"
+#include    "cphcntpbkthumbnailloader.h"
+
+#include    <CPbkContactItem.h>
+#include    <CPbkContactEngine.h>
+#include    <CPbkThumbnailManager.h>
+#include    <fbs.h>
+
+// CONSTANTS
+
+// Granularity of thumbnail array.
+const TInt KPhoneThumbnailArrayGranularity = 5;
+
+// Maximum amount of thumbnails.
+const TInt KPhoneThumbnailMax = 20;
+
+// Panic literal for thumbnail related panics.
+_LIT( KPhCntThumbnailLoaderPanic, "PhCntThumb" );
+
+// ============================ MEMBER FUNCTIONS ===============================
+
+// -----------------------------------------------------------------------------
+// CPhCntThumbnailLoaderImpl::NewL
+// Two-phased constructor.
+// -----------------------------------------------------------------------------
+//
+CPhCntThumbnailLoaderImpl* CPhCntThumbnailLoaderImpl::NewL(
+        MPhCntThumbnailLoaderObserver& aObserver,
+        MPhoneCntPbkOwner& aPbkOwner,
+        MPhCntThumbnailLoader& aLoader )
+    {
+    CPhCntThumbnailLoaderImpl* self = 
+        new ( ELeave ) CPhCntThumbnailLoaderImpl( 
+            aObserver,
+            aPbkOwner,
+            aLoader );
+
+    CleanupStack::PushL( self );
+    self->ConstructL( aPbkOwner );
+    CleanupStack::Pop();
+
+    return self;
+    }
+        
+// -----------------------------------------------------------------------------
+// CPhCntThumbnailLoaderImpl::~CPhCntThumbnailLoaderImpl
+// -----------------------------------------------------------------------------
+//
+CPhCntThumbnailLoaderImpl::~CPhCntThumbnailLoaderImpl()
+    {
+    delete iBitmap;
+    ClearThumbnailArray();
+    iArray.Close();
+    delete iLoader;
+    delete iBridge;
+    }
+
+// -----------------------------------------------------------------------------
+// CPhCntThumbnailLoaderImpl::Load
+// -----------------------------------------------------------------------------
+//
+TInt CPhCntThumbnailLoaderImpl::Load( 
+        TThumbnailId& aId, 
+        const CPhCntContactId& aContactId )
+    {
+    // If condition doesn't hold, then definitely something is badly
+    // wrong.
+    if ( iArray.Count() < KPhoneThumbnailMax )
+        {
+        TRAPD( err, AttemptLoadL( aId, aContactId ) );
+
+        if ( err != KErrNone )
+            {
+            aId = KPhCntThumbnailNullId;
+            }
+
+        return err;
+        }
+    else
+        {
+        aId = KPhCntThumbnailNullId;
+        return KErrNotFound;
+        }
+    }
+
+// -----------------------------------------------------------------------------
+// CPhCntThumbnailLoaderImpl::Cancel
+// -----------------------------------------------------------------------------
+//
+void CPhCntThumbnailLoaderImpl::Cancel( 
+        TThumbnailId aId )
+    {
+    TInt index = FindById( aId );
+
+    // If not found, then we can ignore the call.
+    if ( index == KErrNotFound )
+        {
+        return;
+        }
+
+    // Remove thumbnail loading information from array.
+    RemoveThumbnailArrayEntry( index );
+    
+    // If we are currently loading this, then cancel loading.
+    if ( iCurrent != KPhCntThumbnailNullId && aId == iCurrent )
+        {      
+        CancelLoad();
+        }
+    
+    if ( iCurrent == KPhCntThumbnailNullId && iArray.Count() )
+        {
+        Start( ELoadFromContact );
+        }
+    }
+    
+void CPhCntThumbnailLoaderImpl::LoadingCompleted(
+    CFbsBitmap* aBitmap,
+    TInt aResult )
+    {
+    if( aResult == KErrNone )
+        {
+        if ( iCurrent != KPhCntThumbnailNullId )
+            {
+
+            iBitmap = aBitmap;
+            Start( EProcessResult );       
+            }
+        else
+            {
+            delete aBitmap;
+            }
+        }
+    else
+        {
+        if ( iCurrent != KPhCntThumbnailNullId )
+            {
+            TThumbnailId old = iCurrent;
+
+            Cancel( old );
+            Notify( old, aResult, NULL );
+            }
+        }
+    }
+
+// -----------------------------------------------------------------------------
+// CPhCntThumbnailLoaderImpl::CPhCntThumbnailLoaderImpl
+// C++ constructor can NOT contain any code, that
+// might leave.
+// -----------------------------------------------------------------------------
+//
+CPhCntThumbnailLoaderImpl::CPhCntThumbnailLoaderImpl(
+        MPhCntThumbnailLoaderObserver& aObserver,
+        MPhoneCntPbkOwner& /*aPbkOwner*/,
+        MPhCntThumbnailLoader& aLoader )
+    : iObserver( aObserver ),
+      iArray( KPhoneThumbnailArrayGranularity ),
+      iCurrent( KPhCntThumbnailNullId ),
+      iLoader( &aLoader )
+    {
+    }
+
+// -----------------------------------------------------------------------------
+// CPhCntThumbnailLoaderImpl::ConstructL
+// Symbian 2nd phase constructor can leave.
+// -----------------------------------------------------------------------------
+//
+void CPhCntThumbnailLoaderImpl::ConstructL(
+    MPhoneCntPbkOwner& /*aPbkOwner*/ )
+    {
+    iBridge = 
+        CIdle::NewL(
+            CActive::EPriorityStandard );
+    }
+
+// -----------------------------------------------------------------------------
+// CPhCntThumbnailLoaderImpl::AttemptLoadL
+// -----------------------------------------------------------------------------
+//
+void CPhCntThumbnailLoaderImpl::AttemptLoadL( 
+        TThumbnailId aId,
+        const CPhCntContactId& aContactId )
+    {
+    // Create new thumbnail information.
+    TThumbnailInfo info;
+    info.iId = aId;
+    info.iContactId = aContactId.CloneL();
+    User::LeaveIfError( iArray.Append( info ) );
+
+    // If there were no items, then we can start loading the first image.
+    if ( iCurrent == KPhCntThumbnailNullId )
+        {
+        Start( ELoadFromContact );
+        }
+    }
+
+// -----------------------------------------------------------------------------
+// CPhCntThumbnailLoaderImpl::StartLoadL
+// -----------------------------------------------------------------------------
+//
+void CPhCntThumbnailLoaderImpl::StartLoadL()
+    {
+    if ( !iArray.Count() )
+        {
+        return;
+        }
+
+    TThumbnailInfo& info = iArray[ 0 ]; // first
+    iCurrent = info.iId;
+
+    // Clear pbk
+    ClearPbk( ETrue ); 
+    
+    iLoader->LoadL( *info.iContactId, *this );
+    }
+
+// -----------------------------------------------------------------------------
+// CPhCntThumbnailLoaderImpl::CancelLoad
+// -----------------------------------------------------------------------------
+//
+void CPhCntThumbnailLoaderImpl::CancelLoad()
+    {
+    iCurrent = KPhCntThumbnailNullId; 
+    
+    delete iBitmap;
+    iBitmap = NULL;
+
+    ClearPbk( iArray.Count() );
+    }
+
+// -----------------------------------------------------------------------------
+// CPhCntThumbnailLoaderImpl::ProcessResultL
+// -----------------------------------------------------------------------------
+//
+void CPhCntThumbnailLoaderImpl::ProcessResultL()
+    {
+    if ( iCurrent == KPhCntThumbnailNullId )
+        {
+        return;
+        }
+
+    if ( !iBitmap )
+        {
+        User::Leave( KErrNotFound );
+        }
+    else
+        {
+        CFbsBitmap* bitmap = iBitmap;
+        iBitmap = NULL;
+        TThumbnailId old = iCurrent;
+        Cancel( iCurrent );
+        Notify( old, KErrNone, bitmap );
+        }
+    }
+
+// -----------------------------------------------------------------------------
+// CPhCntThumbnailLoaderImpl::HandleStartL
+// -----------------------------------------------------------------------------
+//
+void CPhCntThumbnailLoaderImpl::HandleStartL()
+    {
+    switch ( iState )
+        {
+        case ELoadFromContact:
+            StartLoadL();
+            break;
+
+        case EProcessResult:
+            ProcessResultL();
+            break;
+
+        default:
+            Panic( EPanicInvalidState );
+            break;
+        }
+    }
+
+// -----------------------------------------------------------------------------
+// CPhCntThumbnailLoaderImpl::HandleStart
+// -----------------------------------------------------------------------------
+//
+void CPhCntThumbnailLoaderImpl::HandleStart()
+    {
+    TRAPD( err, HandleStartL() );
+
+    if ( err != KErrNone && iCurrent != KPhCntThumbnailNullId )
+        {
+        TThumbnailId old = iCurrent;
+        Cancel( iCurrent );
+        Notify( old, err, NULL );
+        }
+    }
+
+// -----------------------------------------------------------------------------
+// CPhCntThumbnailLoaderImpl::Start
+// -----------------------------------------------------------------------------
+//
+void CPhCntThumbnailLoaderImpl::Start( TState aState )
+    {
+    iState = aState;
+    iBridge->Cancel();
+    iBridge->Start( TCallBack( DoStart, this ) );
+    }
+
+// -----------------------------------------------------------------------------
+// CPhCntThumbnailLoaderImpl::DoStart
+// -----------------------------------------------------------------------------
+//
+TInt CPhCntThumbnailLoaderImpl::DoStart( TAny* aAny )
+    {
+    CPhCntThumbnailLoaderImpl* loader =
+        static_cast< CPhCntThumbnailLoaderImpl* >( aAny );
+
+    loader->HandleStart();
+
+    return KErrNone;
+    }
+
+// -----------------------------------------------------------------------------
+// CPhCntThumbnailLoaderImpl::Notify
+// -----------------------------------------------------------------------------
+//
+void CPhCntThumbnailLoaderImpl::Notify( 
+        TThumbnailId aId,
+        TInt aResult, 
+        CFbsBitmap* aBitmap )
+    {
+    iObserver.MpctloThumbnailLoaded( aId, aResult, aBitmap );
+    }
+
+// -----------------------------------------------------------------------------
+// CPhCntThumbnailLoaderImpl::ClearPbk
+// -----------------------------------------------------------------------------
+//
+void CPhCntThumbnailLoaderImpl::ClearPbk( TBool aMore )
+    {
+   
+    iLoader->Cancel();
+
+    if ( !aMore )
+        {
+        iLoader->Release();
+        }
+    }
+
+// -----------------------------------------------------------------------------
+// CPhCntThumbnailLoaderImpl::FindById
+// -----------------------------------------------------------------------------
+//
+TInt CPhCntThumbnailLoaderImpl::FindById( TThumbnailId aId )
+    {
+    TThumbnailInfo info;
+    info.iId = aId;
+    // info.iContactId doesn't matter.
+
+    return 
+        iArray.Find( 
+            info,
+            TIdentityRelation<TThumbnailInfo>( CompareIds ) );
+    }
+
+// -----------------------------------------------------------------------------
+// CPhCntThumbnailLoaderImpl::CompareIds
+// -----------------------------------------------------------------------------
+//
+TBool CPhCntThumbnailLoaderImpl::CompareIds( 
+        const TThumbnailInfo& aFirst,
+        const TThumbnailInfo& aSecond )
+    {
+    return aFirst.iId == aSecond.iId;
+    }
+
+// -----------------------------------------------------------------------------
+// CPhCntThumbnailLoaderImpl::Panic
+// -----------------------------------------------------------------------------
+//
+void CPhCntThumbnailLoaderImpl::Panic( 
+        TPanicReason aReason )
+    {
+    User::Panic( KPhCntThumbnailLoaderPanic, aReason );
+    }
+ 
+// -----------------------------------------------------------------------------
+// CPhCntThumbnailLoaderImpl::ClearThumbnailArray
+// -----------------------------------------------------------------------------
+//   
+void CPhCntThumbnailLoaderImpl::ClearThumbnailArray()
+    {
+    const TInt count( iArray.Count() );
+    for( TInt i = 0; i < count; i++ ) 
+        {
+        RemoveThumbnailArrayEntry( i );
+        }
+    }
+   
+// -----------------------------------------------------------------------------
+// CPhCntThumbnailLoaderImpl::ClearThumbnailArrayEntry
+// -----------------------------------------------------------------------------
+//        
+void CPhCntThumbnailLoaderImpl::RemoveThumbnailArrayEntry( TInt aIndex )
+    {
+    TThumbnailInfo info = iArray[aIndex];
+    delete info.iContactId;
+    iArray.Remove( aIndex );
+    }
+
+//  End of File