/*

* Copyright (c) 2002-2009 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:  This implements CUsbActiveState class.

*

*/

// INCLUDE FILES

#include <usbman.h>

#include "debug.h"

#include "cusbactivestate.h"

#include "cusbwatcher.h"

// CONSTANTS

const TUint KUsbAllStates = 0xFFFFFFFF;

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

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

// C++ default constructor can NOT contain any code, that might leave.

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

//

CUsbActiveState::CUsbActiveState( RUsb& aUsbMan, CUsbWatcher& aOwner )

    : CActive( EPriorityStandard )

    , iUsbMan( aUsbMan )

    , iOwner( aOwner )

    , iPreviousState( EUsbDeviceStateUndefined )

    {

    LOG_FUNC

    CActiveScheduler::Add( this );

    }

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

// Symbian 2nd phase constructor can leave.

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

//

void CUsbActiveState::ConstructL()

    {

    LOG_FUNC

    LEAVEIFERROR( iUsbMan.GetDeviceState( iCurrentState ) );

    LOG1( "Intial UsbDeviceState = %d" , iCurrentState );

    // start USB if cable is pluged-in at bootup

    if( EUsbDeviceStateUndefined != iCurrentState )

        {

        iPreviousState = iCurrentState;

        }

    iUsbMan.DeviceStateNotification( KUsbAllStates, iCurrentState, iStatus );

    SetActive();

    }

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

// Two-phased constructor.

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

//

CUsbActiveState* CUsbActiveState::NewL( RUsb& aUsbMan, CUsbWatcher& aOwner )

    {

    LOG_FUNC

    CUsbActiveState* self = new ( ELeave ) CUsbActiveState( aUsbMan, aOwner );

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop(); // pop self

    return self;

    }

// Destructor

CUsbActiveState::~CUsbActiveState()

    {

    LOG_FUNC

    Cancel();

    }

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

// This function is called when device state is changed.

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

//

void CUsbActiveState::RunL()

    {

    LOG_FUNC

    LEAVEIFERROR( iStatus.Int() ); // Close process if error happens here

    TUsbDeviceState newState = iCurrentState;

    iUsbMan.DeviceStateNotification( KUsbAllStates, iCurrentState,

            iStatus );

    SetActive();

    // Notify only if there is a change

    if ( newState != iPreviousState )

        {

        LOG2( "USB device state changed: %d ==> %d", iPreviousState,

            newState );

        iPreviousState = newState;

        }

     else

        {

        LOG2("USB device change ignored: %d -> %d", iPreviousState,

            newState ); 

        }

    }

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

// Standard active object cancellation function.

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

//

void CUsbActiveState::DoCancel()

    {

    LOG_FUNC

    iUsbMan.DeviceStateNotificationCancel();

    }

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

// Get current device state.

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

//

TUsbDeviceState CUsbActiveState::CurrentState()

    {

    LOG_FUNC

    return iCurrentState;

    }

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

// Get previous device state.

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

//

TUsbDeviceState CUsbActiveState::PreviousState()

    {

    LOG_FUNC

    return iPreviousState;

    }

// End of file