/*

* Copyright (c) 2007 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:  Watches USB states

*

*/

#include "cusbstatewatcher.h"

#include "debug.h"

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

// Two-phase construction 

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

//

CUsbStateWatcher* CUsbStateWatcher::NewL(CUsbDevCon& aObserver, RDevUsbcClient& aLdd)

    {

    FLOG( _L( "[USBDEVCON]\tCUsbStateWatcher::NewL" ) );

    CUsbStateWatcher* self = new (ELeave) CUsbStateWatcher(aObserver, aLdd);

    CleanupStack::PushL(self);

    self->ConstructL();

    CleanupStack::Pop(self);

    return self;    

    }

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

// Default construction 

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

//

CUsbStateWatcher::CUsbStateWatcher(CUsbDevCon& aObserver, RDevUsbcClient& aLdd) :

                                                            CActive(EPriorityMore),

                                                            iState(EUsbcNoState),

                                                            iObserver(aObserver),

                                                            iLdd(aLdd)

    {

    CActiveScheduler::Add(this);

    }

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

// Two-phase construction 

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

//

void CUsbStateWatcher::ConstructL()

    {

    }

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

// Destruction 

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

//

CUsbStateWatcher::~CUsbStateWatcher()

    {

    Cancel();

    }   

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

// Cancellation 

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

//

void CUsbStateWatcher::DoCancel()

    {

    iLdd.AlternateDeviceStatusNotifyCancel();

    }

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

// Standard active object error function.

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

//

TInt CUsbStateWatcher::RunError( TInt /*aError*/ )

    {

    return KErrNone;

    }

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

// USB state has changed 

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

//

void CUsbStateWatcher::RunL()

    {

    if (!(iState & KUsbAlternateSetting))

        {

        iObserver.ActAccordinglyToUsbStateL(TUsbcDeviceState(iState));

        }

        else 

        {

        // Alternate interface setting changed to iDeviceState & ~KUsbAlternateSetting

        }

    }

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

// Start listening to USB state changes 

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

//

void CUsbStateWatcher::Activate()

    {

    FLOG( _L( "[USBDEVCON]\tCUsbStateWatcher::Activate" ) );

    if(IsActive())

        {

        return;

        }

    iLdd.AlternateDeviceStatusNotify(iStatus, iState);

    SetActive();

    FLOG( _L( "[USBDEVCON]\tCUsbStateWatcher::Activate end" ) );

    }