/*

* Copyright (c) 2006 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:  Implementation of state manager for session and audio routing states.

*

*/

// INCLUDE FILES

#include    "CVtEngStateManager.h"

#include    "CVtEngHandlerContainer.h"

#include    "CVtEngStateBase.h"

#include    "CVtEngStateIdle.h"

#include    "CVtEngStateOpen.h"

#include    "CVtEngEventManager.h"

#include    "CVtEngStateConnected.h"

#include    "CVtEngOperation.h"

#include    "cvtlogger.h"

// ============================ MEMBER FUNCTIONS ===============================

// -----------------------------------------------------------------------------

// CVtEngStateManager::CVtEngStateManager

// C++ constructor can NOT contain any code, that

// might leave.

// -----------------------------------------------------------------------------

//

CVtEngStateManager::CVtEngStateManager( 

    CVtEngHandlerContainer& aHandlers,

    CVtEngEventManager& aEventManager ) : 

    iPreviousSessionState( MVtEngSessionInfo::EUnknown ),

    iHandlers( aHandlers ), 

    iEventManager( aEventManager )

    {

    }

// -----------------------------------------------------------------------------

// CVtEngStateManager::ConstructL

// Symbian 2nd phase constructor can leave.

// -----------------------------------------------------------------------------

//

void CVtEngStateManager::ConstructL()

    {

    iSessionState = new ( ELeave ) 

        CVtEngStateIdle( *this, iEventManager );

    }

// -----------------------------------------------------------------------------

// CVtEngStateManager::NewL

// Two-phased constructor.

// -----------------------------------------------------------------------------

//

CVtEngStateManager* CVtEngStateManager::NewL(

    CVtEngHandlerContainer& aHandlers,

    CVtEngEventManager& aEventManager )

    {

    __VTPRINT( DEBUG_GEN , "CVtEngStateManager::NewL" )

    CVtEngStateManager* self = new ( ELeave ) 

        CVtEngStateManager( aHandlers, aEventManager );

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop();

    return self;

    }

// Destructor

CVtEngStateManager::~CVtEngStateManager()

    {

    __VTPRINT( DEBUG_GEN , "CVtEngStateManager::~" )

    delete iSessionState;

    }

// -----------------------------------------------------------------------------

// CVtEngStateManager::UpdateL

// Updates current state.

// 

// -----------------------------------------------------------------------------

//

void CVtEngStateManager::Update( )

    {

    if ( iSessionState )

        {

        TRAPD(err,iSessionState->UpdateL());

        if ( err != KErrNone )

            {

            __VTPRINT2( DEBUG_GEN, "SM.update fail=%d", err )

            iEventManager.NotifyEvent( err );

            }

        }

    }

// -----------------------------------------------------------------------------

// CVtEngStateManager::IsCommandPossible

// Checks if a command is possible in current state.

// 

// -----------------------------------------------------------------------------

//

TBool CVtEngStateManager::IsCommandPossible( 

            const TVtEngCommandId aCommandId ) const

    {

    if ( iSessionState )

        {

        return iSessionState->ValidateCommand( aCommandId );

        }

    return EFalse;

    }

// -----------------------------------------------------------------------------

// CVtEngStateManager::SetState

// Sets new session state.

// 

// -----------------------------------------------------------------------------

//

void CVtEngStateManager::SetState( CVtEngStateBase& aNewState )

    {

    if( iSessionState )

        {

        iPreviousSessionState = iSessionState->State();

        }

    iSessionState = &aNewState;

    }

// -----------------------------------------------------------------------------

// CVtEngStateManager::HandleOperationL

// 

// 

// -----------------------------------------------------------------------------

//

TBool CVtEngStateManager::HandleOperationL( CVtEngOperation& aOp )

    {

    __VTPRINT2( DEBUG_GEN, "StateMgr.HandleOp=%d", aOp.Command() )

    TInt handled( EFalse );

    if ( iSessionState )

        {

        handled = iSessionState->HandleL( aOp );

        }

    __VTPRINT2( DEBUG_GEN | DEBUG_RETURN, "StateMgr.HandleOp handled=%d", 

        handled )

    return handled;

    }

// -----------------------------------------------------------------------------

// CVtEngStateManager::SessionState

// Returns session state.

// 

// -----------------------------------------------------------------------------

//

MVtEngSessionInfo::TSessionState CVtEngStateManager::SessionState() const

    {

    if ( iSessionState )

        {

        return iSessionState->State();

        }

    return MVtEngSessionInfo::EUnknown;

    }

// -----------------------------------------------------------------------------

// CVtEngStateManager::PreviousSessionState

// Returns session state.

// 

// -----------------------------------------------------------------------------

//

MVtEngSessionInfo::TSessionState CVtEngStateManager::PreviousSessionState() const

    {

    return iPreviousSessionState;

    }

//  End of File