--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/idlefw/plugins/devicestatus/src/aicontentobserveroptimizer.cpp	Thu Dec 17 08:54:17 2009 +0200
@@ -0,0 +1,236 @@
+/*
+* Copyright (c) 2006 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:  Active Idle Content Observer optimizer
+*
+*/
+
+
+#include "aicontentobserveroptimizer.h"
+
+CAiContentObserverOptimizer* CAiContentObserverOptimizer::NewL(MAiContentObserver& aObserver)
+    {
+    return new(ELeave) CAiContentObserverOptimizer( aObserver );
+    }
+    
+CAiContentObserverOptimizer::~CAiContentObserverOptimizer()
+    {
+    iBlackList.Close();
+    }
+
+TInt CAiContentObserverOptimizer::StartTransaction( TInt aTxId )
+    {
+    TInt err = KErrAlreadyExists;
+    if ( iTransactionStarted )
+        {
+        return err;
+        }
+    iCommitNeeded = EFalse;
+    
+    err = iObserver.StartTransaction( aTxId );
+    if ( err == KErrNone )
+        {
+        iTransactionStarted = ETrue;
+        }
+    return err;   
+    }
+    
+
+TInt CAiContentObserverOptimizer::Commit( TInt aTxId )
+    {
+    TInt err = KErrNotReady;
+    if ( iTransactionStarted )
+        {
+        if ( iCommitNeeded )
+            {
+            iCommitNeeded = EFalse;
+            err = iObserver.Commit( aTxId );
+            }
+        else
+            {
+            err = CancelTransaction( aTxId );
+            }
+        }
+    iTransactionStarted = EFalse;
+    return err;
+    }
+    
+
+TInt CAiContentObserverOptimizer::CancelTransaction( TInt aTxId )
+    {
+    TInt err = KErrNotReady;
+    if ( iTransactionStarted )
+        {
+        err = iObserver.CancelTransaction( aTxId );
+        }
+    iTransactionStarted = EFalse;
+    return err;
+    }
+    
+    
+TBool CAiContentObserverOptimizer::CanPublish( MAiPropertyExtension& aPlugin,
+                                           TInt aContent,
+                                           TInt aIndex )
+    {
+    return iObserver.CanPublish( aPlugin, aContent, aIndex );
+    }
+  
+TInt CAiContentObserverOptimizer::Publish( MAiPropertyExtension& aPlugin,
+                                       TInt aContent,
+                                       TInt aResource,
+                                       TInt aIndex )
+    {
+    if ( IsInBlackList( aContent, aIndex ) )
+        {
+        return KErrNotFound;
+        }   
+    TInt err = iObserver.Publish( aPlugin, aContent, aResource, aIndex );
+    // Publish went through OK, we need to commit the transaction
+    if ( err == KErrNone && iTransactionStarted )
+        {
+        iCommitNeeded = ETrue;
+        }
+    // publish failed because the ui declaration doesn't
+    // include this content => add to black list and 
+    // don't try to publish again    
+    else if ( err == KErrNotFound || err == KErrNotSupported )
+        {
+        AddToBlackList( aContent, aIndex );
+        }
+    return err;
+    }
+    
+    
+TInt CAiContentObserverOptimizer::Publish( MAiPropertyExtension& aPlugin,
+                                       TInt aContent,
+                                       const TDesC16& aText,
+                                       TInt aIndex )
+    {
+    if ( IsInBlackList( aContent, aIndex ) )
+        {
+        return KErrNotFound;
+        }   
+    TInt err = iObserver.Publish( aPlugin, aContent, aText, aIndex );
+    // Publish went through OK, we need to commit the transaction
+    if ( err == KErrNone && iTransactionStarted )
+        {
+        iCommitNeeded = ETrue;
+        }
+    // publish failed because the ui declaration doesn't
+    // include this content => add to black list and 
+    // don't try to publish again    
+    else if ( err == KErrNotFound || err == KErrNotSupported )
+        {
+        AddToBlackList( aContent, aIndex );
+        }
+    return err;
+    }
+    
+    
+TInt CAiContentObserverOptimizer::Publish( MAiPropertyExtension& aPlugin,
+                                       TInt aContent,
+                                       const TDesC8& aBuf,
+                                       TInt aIndex )
+    {
+    if ( IsInBlackList( aContent, aIndex ) )
+        {
+        return KErrNotFound;
+        }
+    TInt err = iObserver.Publish( aPlugin, aContent, aBuf, aIndex );
+    // Publish went through OK, we need to commit the transaction
+    if ( err == KErrNone && iTransactionStarted )
+        {
+        iCommitNeeded = ETrue;
+        }
+    // publish failed because the ui declaration doesn't
+    // include this content => add to black list and 
+    // don't try to publish again    
+    else if ( err == KErrNotFound || err == KErrNotSupported )
+        {
+        AddToBlackList( aContent, aIndex );
+        }
+    return err;
+    
+    }
+    
+    
+TInt CAiContentObserverOptimizer::Publish( MAiPropertyExtension& aPlugin,
+                                       TInt aContent,
+                                       RFile& aFile,
+                                       TInt aIndex )
+    {
+    if ( IsInBlackList( aContent, aIndex ) )
+        {
+        return KErrNotFound;
+        }    
+    TInt err = iObserver.Publish( aPlugin, aContent, aFile, aIndex );
+    // Publish went through OK, we need to commit the transaction
+    if ( err == KErrNone && iTransactionStarted )
+        {
+        iCommitNeeded = ETrue;
+        }
+    // publish failed because the ui declaration doesn't
+    // include this content => add to black list and 
+    // don't try to publish again
+    else if ( err == KErrNotFound || err == KErrNotSupported )
+        {
+        AddToBlackList( aContent, aIndex );
+        }
+    return err;
+    }
+    
+    
+TInt CAiContentObserverOptimizer::Clean( MAiPropertyExtension& aPlugin,
+                                     TInt aContent,
+                                     TInt aIndex )
+    {
+    return iObserver.Clean( aPlugin, aContent, aIndex );    
+    }
+
+MAiContentObserver& CAiContentObserverOptimizer::Observer() const
+    {
+    return iObserver;
+    }
+
+TInt CAiContentObserverOptimizer::AddToBlackList( TInt aContentId, TInt aIndex )
+    {
+    TInt err = KErrNone;
+    if ( !IsInBlackList( aContentId, aIndex ) )
+        {
+        TAiPublishBlackList entry;
+        entry.iContentId = aContentId;
+        entry.iIndex = aIndex;
+        err = iBlackList.Append( entry );
+        }
+    return err;
+    }
+
+TBool CAiContentObserverOptimizer::IsInBlackList( TInt aContentId, TInt aIndex ) const 
+    {
+    for (TInt i = 0; i < iBlackList.Count(); ++i )
+        {       
+        if ( iBlackList[i].iContentId == aContentId &&
+             iBlackList[i].iIndex == aIndex )
+            {
+            return ETrue;                   
+            }
+        }
+    return EFalse;
+    }
+
+CAiContentObserverOptimizer::CAiContentObserverOptimizer(MAiContentObserver& aObserver): 
+    iObserver( aObserver )
+    {
+    }
+
+// end of file