/*

* 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:  Low disk space watcher

*

*/

#include <e32base.h>

#include <mpxlog.h>

#include "mpxdiskspacewatcher.h"

#include "mpxdiskspacewatcherobserver.h"

// CONSTANTS

const TInt KLowDiskThreshold  = 131072 * 4; // 128k *4

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

// Constructor

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

//

CMPXDiskSpaceWatcher::CMPXDiskSpaceWatcher( RFs& aFs, TInt aDrive,

                                            MMPXDiskSpaceObserver& aObs  )

                                           : CActive( CActive::EPriorityHigh ),

                                             iFs( aFs ),

                                             iDriveToMonitor( aDrive ),

                                             iObs( aObs )

    {

    CActiveScheduler::Add( this );

    }

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

// ConstructL

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

//

void CMPXDiskSpaceWatcher::ConstructL()

    {

    }

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

// Two-Phased Constructor

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

//

CMPXDiskSpaceWatcher* CMPXDiskSpaceWatcher::NewL( RFs& aFs, TInt aDrive,

                                                  MMPXDiskSpaceObserver& aObs  )

    {

    CMPXDiskSpaceWatcher* self = new( ELeave ) CMPXDiskSpaceWatcher( aFs,

                                                                     aDrive,

                                                                     aObs );

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self );

    return self;

    }

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

// destructor

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

//

CMPXDiskSpaceWatcher::~CMPXDiskSpaceWatcher()

    {

    Cancel();

    }

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

// Start the watcher

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

//

void CMPXDiskSpaceWatcher::StartL()

    {

    TVolumeInfo volInfo;

    TInt err = iFs.Volume( volInfo, iDriveToMonitor );

    // Only start if the disk is actually working

    //

    if (!IsActive() && err == KErrNone )

        {

        MPX_DEBUG2("CMPXDiskSpaceWatcher::Start monitor drive %d",

                   iDriveToMonitor);

        iFs.NotifyDiskSpace( KLowDiskThreshold, iDriveToMonitor, iStatus );  //lint !e747

        SetActive();

        }

    }

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

// Check if the disk is low on memory

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

//

TBool CMPXDiskSpaceWatcher::IsLowOnDisk()

    {

    TVolumeInfo volInfo;

    TInt err = iFs.Volume( volInfo, iDriveToMonitor );

    MPX_DEBUG3("CMPXDiskSpaceWatcher::IsLowOnDisk disk %i free %i",

               iDriveToMonitor, volInfo.iFree );

    // Can only trust disk space amount if we could get volume info

    //

    if( (volInfo.iFree < KLowDiskThreshold) && err == KErrNone )

        {

        MPX_DEBUG1("LOW DISK SPACE");

        return ETrue;

        }

    else

        {

        MPX_DEBUG1("DISK SPACE OK");

        return EFalse;

        }

    }

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

// Gets the currently monitored drive number

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

//

TInt CMPXDiskSpaceWatcher::CurrentDrive()

    {

    return iDriveToMonitor;

    }

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

// Cancel the disk notification

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

//

void CMPXDiskSpaceWatcher::DoCancel()

    {

    // Cancel the disk space monitoring

    iFs.NotifyDiskSpaceCancel();

    }

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

// Active Object callback

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

//

void CMPXDiskSpaceWatcher::RunL()

    {

    // Callback to observer about which drive is low on disk space

    //

    iObs.HandleLowDiskEvent( iDriveToMonitor );

    }

// END OF FILE