--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/emailservices/emailcommon/src/cemailextensionbase.cpp	Mon May 03 12:23:15 2010 +0300
@@ -0,0 +1,205 @@
+/*
+* Copyright (c) 2009 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:  email internal extension base class
+*
+*/
+
+#include "cemailextensionbase.h"
+#include "emailtrace.h"
+
+/**
+*
+*/
+enum TEmailFwPanic {
+    EEmailExtensionIndexOutOfRange
+    };
+
+_LIT( KEmailExtensionPanic, "EmailFw" );
+    
+void Panic( TEmailFwPanic aPanic )
+    {
+    FUNC_LOG;
+    User::Panic( KEmailExtensionPanic, aPanic );
+    }
+
+// ---------------------------------------------------------------------------
+// c++ constructor
+// ---------------------------------------------------------------------------
+//
+CEmailExtension::CEmailExtension( const TUid& aUid ) : 
+    iUid( TUid::Uid(aUid.iUid ) )
+    {
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+CEmailExtension::~CEmailExtension()
+    {
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+TUid CEmailExtension::Uid() const
+    {
+    return iUid;
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+TUint CEmailExtension::DecRef()
+    {
+    if ( iRefCount )
+        {
+        iRefCount--;
+        }
+    return iRefCount;
+    }
+        
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+void CEmailExtension::IncRef()
+    {
+    ++iRefCount;
+    }
+        
+// ---------------------------------------------------------------------------
+// deletes extension and removes it from extension array
+// ---------------------------------------------------------------------------
+//
+void CExtendableEmail::ReleaseExtension( CEmailExtension* aExtension )
+    {
+    FUNC_LOG;
+    if ( !aExtension->DecRef() )
+        {
+        iExtensions.Remove( aExtension );
+        delete aExtension;
+        }
+    }
+    
+// ---------------------------------------------------------------------------
+// Finds and returns extension
+// ---------------------------------------------------------------------------
+//
+CEmailExtension* CExtendableEmail::ExtensionL( const TUid& aInterfaceUid )
+    {
+    FUNC_LOG;
+    TInt index = iExtensions.FindExtension( aInterfaceUid );
+    CEmailExtension* ext = NULL;
+    if ( index != KErrNotFound )
+        {
+        ext = iExtensions.Extension( index );
+        ext->IncRef();
+        }
+    return ext;
+    }
+
+//<qmail>
+// ---------------------------------------------------------------------------
+// Constructor is required for sbs2 to generate the same .defs for urel/udeb
+// ---------------------------------------------------------------------------
+//
+CExtendableEmail::CExtendableEmail()
+    {
+    FUNC_LOG;
+    }
+//</qmail>
+
+// ---------------------------------------------------------------------------
+// destructor
+// ---------------------------------------------------------------------------
+//
+TEmailExtensions::~TEmailExtensions()
+    {
+    iExtensions.Close();
+    }
+
+// ---------------------------------------------------------------------------
+// c++ constructor
+// ---------------------------------------------------------------------------
+//
+TEmailExtensions::TEmailExtensions() : iExtensions( 1 )
+    {
+    }
+
+// ---------------------------------------------------------------------------
+// returns index of extension in extension array
+// ---------------------------------------------------------------------------
+//
+TInt TEmailExtensions::FindExtension( const TUid& aUid ) const
+    {
+    TInt index = KErrNotFound;
+    for ( TInt i = 0; i < iExtensions.Count(); i++ )
+        {        
+        const CEmailExtension* tested = iExtensions[i];
+        if ( aUid == tested->Uid() )
+            {
+            index = i;
+            break;
+            }
+        }
+    return index;
+    }
+
+// ---------------------------------------------------------------------------
+// Returns extension by index. Panics if index is out of range.
+// ---------------------------------------------------------------------------
+//
+CEmailExtension* TEmailExtensions::Extension( const TInt aIndex ) const
+    {
+    __ASSERT_ALWAYS( aIndex>=0 && aIndex < iExtensions.Count(),
+        Panic( EEmailExtensionIndexOutOfRange ) );
+    return iExtensions[aIndex];
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+void TEmailExtensions::AddL( CEmailExtension* aExtension )
+    {
+    FUNC_LOG;
+    if ( !aExtension )
+        {
+        User::Leave( KErrArgument );
+        }
+    CleanupStack::PushL( aExtension );
+    iExtensions.AppendL( aExtension );    
+    CleanupStack::Pop();
+    aExtension->IncRef();
+    }
+
+// ---------------------------------------------------------------------------
+// Removes extension from array
+// ---------------------------------------------------------------------------
+//
+void TEmailExtensions::Remove( 
+    const CEmailExtension* aExtension )
+    {
+    FUNC_LOG;
+    const TInt index( FindExtension( aExtension->Uid() ) );
+    if ( index != KErrNotFound )    
+        {
+        iExtensions.Remove( index );
+        }    
+    }
+
+// End of file