--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/idlehomescreen/xmluicontroller/inc/activetransactionstack.h	Thu Dec 17 08:40:49 2009 +0200
@@ -0,0 +1,110 @@
+/*
+* Copyright (c) 2005-2007 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:  Active transaction stack
+*
+*/
+
+
+#ifndef C_ACTIVETRANSACTIONSTACK_H
+#define C_ACTIVETRANSACTIONSTACK_H
+
+#include <e32base.h>
+
+
+namespace AiXmlUiController
+    {
+    class MTransaction;
+    class CTransaction;
+    }
+
+
+namespace AiXmlUiController
+{
+
+/**
+*  @ingroup group_xmluicontroller
+* 
+*  CActiveTransactionStack is a stack for CTransactions
+*
+*  @lib AiXmlUiMain
+*/
+class CActiveTransactionStack : public CBase
+    {
+public:  // Constructors and destructor
+    
+    static CActiveTransactionStack* NewL();
+    
+    virtual ~CActiveTransactionStack();
+
+    // New functions
+    
+    /**
+    * Checks if stack is empty.
+    * @return ETrue if stack is empty
+    */
+    TBool IsEmpty() const;
+    
+    /**
+    * Pushes a transaction into the stack.
+    * @param aTransaction the transaction
+    */
+    void Push( MTransaction* aTransaction );
+    
+    /**
+    * Pops the topmost transaction from the stack.
+    * @return the topmost transaction from the stack
+    */
+    MTransaction* Pop();
+    
+    /**
+    * Returns the topmost transaction from the stack.
+    * @return the topmost transaction from the stack
+    */
+    MTransaction* Top() const;
+    
+    /**
+    * Lookups a transaction from the stack.
+    * @param aTxId the transaction id of the transaction
+    * @return the transaction with aTxId from the stack
+    */
+    MTransaction* Lookup( TInt aTxId ) const;
+    
+    /**
+    * Removes a transaction from the stack.
+    * @param aTxId the transaction id of the transaction
+    * @return the transaction with aTxId from the stack
+    */
+    MTransaction* Remove( TInt aTxId );
+    
+private:
+
+    CActiveTransactionStack();
+    
+    CTransaction* DoTop() const;
+    
+    CTransaction* DoLookup( TInt aTxId ) const;
+
+private:    // Data
+    
+    /**
+     * Doubly linked list of transactions
+     */ 
+    TDblQue< CTransaction > iTransactions;
+    };
+    
+} // namespace AiXmlUiController
+
+#endif      // C_ACTIVETRANSACTIONSTACK_H
+           
+//  End of File