--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wvuing/IMPSConnectionUI/OperationStepSrc/CCnUiCntrlStepDriver.cpp	Thu Dec 17 08:41:52 2009 +0200
@@ -0,0 +1,145 @@
+/*
+* Copyright (c) 2004 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:  Control step driver.
+*
+*/
+
+// INCLUDE FILES
+#include <E32std.h>
+#include "CCnUiCntrlStepDriver.h"
+#include "MCnUiCntrlStep.h"
+
+#include "CnUiPanics.h"
+#include "IMPSCommonUiDebugPrint.h"
+
+
+// ================= MEMBER FUNCTIONS =======================
+// Two-phased constructor.
+CCnUiCntrlStepDriver* CCnUiCntrlStepDriver::NewL()
+    {
+    CCnUiCntrlStepDriver* self = CCnUiCntrlStepDriver::NewLC();
+    CleanupStack::Pop( self );
+    return self;
+    }
+
+
+// Two-phased constructor.
+CCnUiCntrlStepDriver* CCnUiCntrlStepDriver::NewLC()
+    {
+    CCnUiCntrlStepDriver* self = new ( ELeave ) CCnUiCntrlStepDriver();
+    CleanupStack::PushL( self );
+    return self;
+    }
+
+
+// Destructor
+CCnUiCntrlStepDriver::~CCnUiCntrlStepDriver()
+    {
+    //step driver owns steps
+    iSteps.ResetAndDestroy();
+    }
+
+
+// C++ default constructor can NOT contain any code, that
+// might leave.
+//
+CCnUiCntrlStepDriver::CCnUiCntrlStepDriver()
+    {
+    }
+
+
+
+// -----------------------------------------------------------------------------
+// CCnUiCntrlStepDriver::AppendStepL()
+// -----------------------------------------------------------------------------
+//
+void CCnUiCntrlStepDriver::AppendStepL( MCnUiCntrlStep* aStep )
+    {
+    __ASSERT_ALWAYS( aStep,
+                     CnUiPanicOrLeaveL( EIMPSConn_NULLPtr,
+                                        KErrArgument ) );
+
+    User::LeaveIfError( iSteps.Append( aStep ) );
+    }
+
+
+// -----------------------------------------------------------------------------
+// CCnUiCntrlStepDriver::ExecuteL()
+// -----------------------------------------------------------------------------
+//
+TInt CCnUiCntrlStepDriver::ExecuteL()
+    {
+    __ASSERT_ALWAYS( iSteps.Count() > 0,
+                     CnUiPanicOrLeaveL( EIMPSConnStepDriverUninitialized,
+                                        KErrNotSupported ) );
+
+    //Run each step untill all done or first error occured
+    //At first execution round start form initial step.
+    TInt stepResult = KErrNone;
+    const TInt totalStepCount = iSteps.Count();
+    TInt lastRunnedIndex = 0;
+    TInt runIndex = 0;
+
+    TBool restartNeeded( ETrue );
+    while ( restartNeeded )
+        {
+        // by default we do not need to restart
+        restartNeeded = EFalse;
+        stepResult = KErrNone;
+
+        while ( ( runIndex < totalStepCount ) && ( stepResult == KErrNone ) )
+            {
+            MCnUiCntrlStep* cStep = iSteps[ runIndex ];
+            stepResult = cStep->RunStepL();
+            lastRunnedIndex = runIndex;
+            runIndex++;
+            }
+
+        //Teardown each so far run step untill all are teardowned.
+        //Correct teardown operation is called according the last
+        //runned step return status.
+        //If steps were runned succesfully, some operation may
+        //restart processing if it wishes so. Restart is
+        //done from step wishing so forward.
+        TInt teardownIndex = lastRunnedIndex;
+        while ( ( teardownIndex >= 0 ) && ( !restartNeeded ) )
+            {
+            MCnUiCntrlStep* cStep = iSteps[ teardownIndex ];
+            if ( stepResult == KErrNone )
+                {
+                if ( cStep->HandleCompleteL() == ECnUiRestartStep )
+                    {
+                    //Restart runing from this step
+                    runIndex = teardownIndex;
+                    // we need to restart the whole thing from start
+                    restartNeeded = ETrue;
+                    }
+                }
+            else
+                {
+                cStep->UndoStepL();
+                }
+
+            teardownIndex--;
+            }
+        }
+
+    //return the status from last run step
+    return stepResult;
+    }
+
+
+//  End of File
+
+