/*

* 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 <cntviewparams.h>

#include <QDebug>

CntViewNavigator::CntViewNavigator( QObject* aParent ) : 

    QObject( aParent ),

    iTop( noView )

{

}

CntViewNavigator::~CntViewNavigator()

{

}

void CntViewNavigator::next( const int& aId, QFlags<Hb::ViewSwitchFlag> &flags )

{

    if ( !iViewStack.isEmpty() )

    {

        int top = iViewStack.top();

        // If any special effects are defined for the current (top) view and associated with the next view

        if ( iEffects.contains( top ) && iEffects.value( top ) == aId ) 

        {

            flags = Hb::ViewSwitchUseNormalAnim | Hb::ViewSwitchUseAltEvent;

        }

        else

        {

            flags = Hb::ViewSwitchUseNormalAnim;

        }

    }

    iViewStack.push( aId );

}

const int& CntViewNavigator::back( QFlags<Hb::ViewSwitchFlag> &flags, bool toRoot )

{

    iTop = 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() ) 

    {

        int top = iViewStack.top();

        // If we need to go to the latest root view

        if ( toRoot )

        {

            while ( !iViewStack.isEmpty() ) 

            {

                int current = iViewStack.top();

                if ( iRoots.contains( current ) )

                {

                    iTop = current;

                    break;

                }

                iViewStack.pop();

            }

        }

        // If any exception defined for the current (top) view

        else 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();

            }

        }

        // If any special effects are defined for the current (top) view and associated with the previous view

        if ( iEffects.contains( top ) && iEffects.value( top ) == iTop ) 

        {

            flags = Hb::ViewSwitchUseBackAnim | Hb::ViewSwitchUseAltEvent;

        }

        else

        {

            flags = Hb::ViewSwitchUseBackAnim;

        }

    } 

    return iTop;

}

void CntViewNavigator::addException( const int& aCurrent, const int& aBack )

{

    iExceptions.insert( aCurrent, aBack );

}

void CntViewNavigator::removeException( const int& aCurrent )

{

    if ( iExceptions.contains(aCurrent) )

    {

        iExceptions.remove( aCurrent );

    }

}

void CntViewNavigator::addEffect( const int& aCurrent, const int& aBack )

{

    iEffects.insert( aCurrent, aBack );

}

void CntViewNavigator::removeEffect( const int& aCurrent )

{

    if ( iEffects.contains(aCurrent) )

    {

        iEffects.remove( aCurrent );

    }

}

void CntViewNavigator::addRoot( const int& aCurrent )

{

    iRoots.append( aCurrent );

}

// End of File