--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/emailservices/emailcommon/inc/cmailboxstateext.h	Tue Aug 31 15:04:17 2010 +0300
@@ -0,0 +1,87 @@
+/*
+* Copyright (c) 2009 - 2010 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:  Mailbox state extension for notifying email protocol plugins
+*               about application state changes.
+*
+*/
+
+#ifndef CMAILBOXSTATEEXT_H
+#define CMAILBOXSTATEEXT_H
+
+#include "cemailextensionbase.h"
+#include "CFSMailCommon.h"
+
+// interface UID value passed to CFSMailClient::ExtensionL
+const TUid KEmailMailboxStateExtensionUid        = { 0x2001E28B };
+
+/**
+* Data providider interface.
+*/
+class MEmailMailboxState
+{
+public:
+// <qmail>
+    /**
+    * Returns currently active folder and related mailbox that
+    * is currently being used.
+    * @param aActiveMailboxId id of currently active mailbox
+    * 
+    * @param aActiveFolderId id of currently active mail folder
+    *        If aActiveFolderId.IsNullId() returns true there is no active
+    *        folder. This happens if e.g. email applications is closed. 
+    * @return Symbian OS error code
+    */
+    virtual TInt GetActiveFolderId( 
+        TFSMailMsgId& aActiveMailboxId,
+        TFSMailMsgId& aActiveFolderId ) const = 0;
+// </qmail>    
+};
+
+/**
+ * Extension interface for passing UI context data to protocol plugins. 
+ */
+class CMailboxStateExtension : public CEmailExtension
+{
+public:
+    
+    /**
+     * Sets data provider interface.
+     * @param aDataProvider data provider.
+     */
+    virtual void SetStateDataProvider( MEmailMailboxState* aDataProvider ) = 0;
+// <qmail>    
+    /**
+    * Notification that folder has changed in email application.
+    * @param aActiveMailboxId id of the mailbox container the folder
+    * @param aActiveFolderId currently active folder id or null id if
+    *        there's currently no active folder (e.g. application is closed)
+    */
+    virtual void NotifyActiveFolderChanged(
+        const TFSMailMsgId& aActiveMailboxId,
+        const TFSMailMsgId& aActiveFolderId) = 0;
+// </qmail>
+
+protected:    
+    inline CMailboxStateExtension();
+
+protected:
+    MEmailMailboxState* iDataProvider;
+};
+
+inline CMailboxStateExtension::CMailboxStateExtension() :
+         CEmailExtension( KEmailMailboxStateExtensionUid )
+    {
+    }
+
+#endif // CMAILBOXSTATEEXT_H