--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/contextframework/cfw/src/cfscriptengine/cfscriptsubscription.cpp	Tue Feb 02 10:12:00 2010 +0200
@@ -0,0 +1,280 @@
+/*
+* Copyright (c) 2007-2007 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:  CCFScriptSubscription class implementation.
+*
+*/
+
+
+
+// INCLUDES
+#include "cfscriptsubscription.h"
+#include "cfscriptlistener.h"
+#include "CFContextSubscriptionImpl.h"
+#include "cftrace.h"
+
+#include <cfcontextinterface.h>
+#include <cfcontextsubscriptionlistener.h>
+
+// ======== MEMBER FUNCTIONS ========
+
+// ---------------------------------------------------------------------------
+// CCFScriptSubscription::CCFScriptSubscription
+// C++ default constructor can NOT contain any code, that might leave.
+// ---------------------------------------------------------------------------
+//
+CCFScriptSubscription::CCFScriptSubscription( MCFContextInterface& aCF,
+    MCFContextSubscriptionListener& aCFListener  )
+    :   iCF( aCF ),
+        iCFListener( aCFListener ),
+        iSubscribed( EFalse )
+    {
+    FUNC_LOG;
+    }
+
+// ---------------------------------------------------------------------------
+// CCFScriptSubscription::ConstructL
+// Symbian 2nd phase constructor can leave.
+// ---------------------------------------------------------------------------
+//
+void CCFScriptSubscription::ConstructL( MCFScriptListener* aListener )
+    {
+    FUNC_LOG;
+
+    if ( !aListener )
+        {
+        ERROR( KErrBadHandle, "CCFScriptSubscription::ConstructL - MCFScriptListener is NULL!" );
+        User::Leave( KErrBadHandle );
+        }
+
+    iSubscription = CCFContextSubscriptionImpl::NewL();
+    iSubscription->SetContextSourceL( aListener->Source() );
+    iSubscription->SetContextTypeL( aListener->Type() );
+    iSubscription->SetSubscriptionListener( iCFListener );
+
+    iListeners.AppendL( aListener );
+    DoSubscribeL( aListener );
+    }
+
+// ---------------------------------------------------------------------------
+// CCFScriptSubscription::NewL
+// Two-phased constructor.
+// ---------------------------------------------------------------------------
+//
+CCFScriptSubscription* CCFScriptSubscription::NewL( MCFContextInterface& aCF,
+    MCFContextSubscriptionListener& aCFListener,
+    MCFScriptListener* aListener )
+    {
+    FUNC_LOG;
+
+    CCFScriptSubscription* self = NewLC( aCF, aCFListener, aListener );
+    CleanupStack::Pop( self );
+    return self;
+    }
+
+// ---------------------------------------------------------------------------
+// CCFScriptSubscription::NewLC
+// Two-phased constructor.
+// ---------------------------------------------------------------------------
+//
+CCFScriptSubscription* CCFScriptSubscription::NewLC( MCFContextInterface& aCF,
+    MCFContextSubscriptionListener& aCFListener,
+    MCFScriptListener* aListener  )
+    {
+    FUNC_LOG;
+
+    CCFScriptSubscription* self
+        = new( ELeave ) CCFScriptSubscription( aCF, aCFListener );
+    CleanupStack::PushL( self );
+    self->ConstructL( aListener );
+    return self;
+    }
+
+
+// Destructor
+CCFScriptSubscription::~CCFScriptSubscription()
+    {
+    FUNC_LOG;
+
+    if ( !iSubscribed )
+        {
+        delete iSubscription;
+        }
+    iListeners.Close();
+    }
+
+
+// -----------------------------------------------------------------------------
+// CCFScriptSubscription::AddListenerL
+// -----------------------------------------------------------------------------
+//
+void CCFScriptSubscription::AddListenerL( MCFScriptListener* aListener )
+    {
+    FUNC_LOG;
+
+    iListeners.AppendL( aListener );
+    NotifyListenerOfCurrentContextValueL( aListener );
+    }
+
+// -----------------------------------------------------------------------------
+// CCFScriptSubscription::RemoveListener
+// -----------------------------------------------------------------------------
+//
+TBool CCFScriptSubscription::RemoveListener( MCFScriptListener* aListener )
+    {
+    FUNC_LOG;
+
+    TInt index = iListeners.Find( aListener );
+    if ( index != KErrNotFound )
+        {
+        iListeners.Remove( index );
+        }
+
+    if ( iListeners.Count() == 0 )
+        {
+        if ( iSubscribed )
+            {
+            iCF.UnsubscribeContext( *iSubscription, iCFListener );
+            iSubscription = NULL; // Was not owned anymore, and deleted by CF.
+            iSubscribed = EFalse;
+            }
+        return ETrue;
+        }
+
+    return EFalse;
+    }
+
+// -----------------------------------------------------------------------------
+// CCFScriptSubscription::Match
+// -----------------------------------------------------------------------------
+//
+TBool CCFScriptSubscription::Match( const MCFScriptListener& aListener ) const
+    {
+    FUNC_LOG;
+
+    if ( iSubscription->ContextSource() == aListener.Source()
+        && iSubscription->ContextType() == aListener.Type() )
+        {
+        return ETrue;
+        }
+
+    return EFalse;
+    }
+
+// -----------------------------------------------------------------------------
+// CCFScriptSubscription::Match
+// -----------------------------------------------------------------------------
+//
+TBool CCFScriptSubscription::Match( const CCFContextObject& aContext ) const
+    {
+    FUNC_LOG;
+
+    if ( iSubscription->ContextSource() == aContext.Source()
+        && iSubscription->ContextType() == aContext.Type() )
+        {
+        return ETrue;
+        }
+
+    return EFalse;
+    }
+
+// -----------------------------------------------------------------------------
+// CCFScriptSubscription::NotifyListeners
+// -----------------------------------------------------------------------------
+//
+TBool CCFScriptSubscription::NotifyListeners( const CCFContextObject& aContext,
+    TInt& aContextLevelDelay ) const
+    {
+    FUNC_LOG;
+
+    TBool evaluated( EFalse );
+    for ( TInt i = 0; i < iListeners.Count(); ++i )
+        {
+        if ( !iListeners[ i ]->IsAllRequired() )
+            {
+            TInt delay( 0 );
+            if ( iListeners[ i ]->Evaluate( aContext, delay ) )
+                {
+                // Evaluation flag may not change back to false.
+                evaluated = ETrue;
+                }
+
+            if ( delay > aContextLevelDelay )
+                {
+                aContextLevelDelay = delay;
+                }
+            }
+        }
+
+    return evaluated;
+    }
+
+// -----------------------------------------------------------------------------
+// CCFScriptSubscription::DoSubscribeL
+// Do subscribe and notify listener about current context value.
+// -----------------------------------------------------------------------------
+//
+TInt CCFScriptSubscription::DoSubscribeL( MCFScriptListener* aListener )
+    {
+    FUNC_LOG;
+
+    RThread thread;
+    CleanupClosePushL( thread );                            // CLEANUP<< thread
+    TInt err = iCF.SubscribeContext( iSubscription, &iCFListener, thread );
+    if( err != KErrNone )
+        {
+        TPtrC source( aListener->Source() );
+        TPtrC type( aListener->Type() );
+        ERROR( err, "CCFScriptSubscription::DoSubscribeL - Subscribing context failed!" );
+        ERROR_2( err, "- context source [%S], type [%S]", &source, &type );
+        }
+    else
+        {
+        iSubscribed = ETrue; // Mark successful subscription.
+        NotifyListenerOfCurrentContextValueL( aListener );
+        }
+    CleanupStack::PopAndDestroy( &thread );                 // CLEANUP>> thread
+
+    return err;
+    }
+
+// -----------------------------------------------------------------------------
+// CCFScriptSubscription::NotifyListenerOfCurrentContextValue
+// -----------------------------------------------------------------------------
+//
+void CCFScriptSubscription::NotifyListenerOfCurrentContextValueL(
+    MCFScriptListener* aListener ) const
+    {
+    FUNC_LOG;
+
+    RThread thread;
+    CleanupClosePushL( thread );                            // CLEANUP<< thread
+    // Request current context value for the new subscription.
+    CCFContextQuery* query = CCFContextQuery::NewLC();      // CLEANUP<< query
+    RContextObjectArray results; // Pointers not owned.
+    CleanupClosePushL( results );                           // CLEANUP<< results
+    query->SetSourceL( iSubscription->ContextSource() );
+    query->SetTypeL( iSubscription->ContextType() );
+
+    iCF.RequestContext( results, *query, thread );
+    if ( results.Count() )
+        {
+        CCFContextObject* context = results[ 0 ];
+        TInt delay( 0 ); // Required by the call but not used.
+        aListener->Evaluate( *context, delay );
+        }
+
+    CleanupStack::PopAndDestroy( &results );                // CLEANUP>> results
+    CleanupStack::PopAndDestroy( query );                   // CLEANUP>> query
+    CleanupStack::PopAndDestroy( &thread );                 // CLEANUP>> thread
+    }