--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/phonebookui/pbkcommonui/src/cntviewnavigator.cpp	Fri Apr 16 14:53:18 2010 +0300
@@ -0,0 +1,87 @@
+/*
+* 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:  
+*
+*/
+#include "cntviewnavigator.h"
+#include <QDebug>
+
+CntViewNavigator::CntViewNavigator( QObject* aParent ) : QObject( aParent ),
+iTop( CntViewParameters::noView )
+{
+}
+
+CntViewNavigator::~CntViewNavigator()
+{   
+}
+
+void CntViewNavigator::next( const CntViewParameters::ViewId& aId )
+{
+    iViewStack.push( aId );
+}
+
+const CntViewParameters::ViewId& CntViewNavigator::back()
+{
+    qDebug() << "CntViewParameters::back() - IN";
+    iTop = CntViewParameters::noView;
+    // Check if exception is set for current view item. Exception
+    // means that instead of one step back, we go back until that 
+    // execption value is located. So all items that are jumped over,
+    // their history will be eared.
+    if ( !iViewStack.isEmpty() ) 
+    {
+        CntViewParameters::ViewId top = iViewStack.top();
+        
+        // If any exception defined for the current (top) view
+        if ( iExceptions.contains( top ) ) 
+        {
+            iTop = iExceptions.value( top );
+            // cleanup the history until the exception value is found
+            while ( !iViewStack.isEmpty() ) 
+            {
+                if ( iTop == iViewStack.top() ) 
+                {
+                    break; // don't pop the exception it self.
+                }
+                iViewStack.pop();
+            }
+        }
+        // No exceptions defined, go one step back
+        else 
+        {
+            iViewStack.pop();
+            if ( !iViewStack.isEmpty() )
+            {
+                iTop = iViewStack.top();
+            }
+        }
+    } 
+    qDebug() << "CntViewParameters::back() - OUT";
+    return iTop;
+}
+
+void CntViewNavigator::addException( const CntViewParameters::ViewId& aCurrent, const CntViewParameters::ViewId& aBack )
+{
+    iExceptions.insert( aCurrent, aBack );
+}
+
+void CntViewNavigator::removeException( const CntViewParameters::ViewId& aCurrent )
+{
+    if ( iExceptions.contains(aCurrent) )
+    {
+        iExceptions.remove( aCurrent );
+    }
+}
+    
+// End of File