/*

 * Copyright (c) 2005 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 applicationmanagement components

 *

 */

#include "AMAppHideUtil.h"

#include <centralrepository.h>

#include <menu2internalcrkeys.h>

#include "debug.h"

using namespace NApplicationManagement;

// The uid list delimiter

static const TChar KUidDelimiter = ',';

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

// CAMAppHideUtil::CAMAppHideUtil()

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

CAMAppHideUtil::CAMAppHideUtil() :

    iChanged(EFalse)

    {

    }

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

// CAMAppHideUtil::ConstructL()

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

void CAMAppHideUtil::ConstructL()

    {

    LoadUidsL();

    }

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

// CAMAppHideUtil::~CAMAppHideUtil()

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

CAMAppHideUtil::~CAMAppHideUtil()

    {

    iHiddenUids.Close();

    }

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

// CAMAppHideUtil::NewL()

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

CAMAppHideUtil* CAMAppHideUtil::NewL()

    {

    CAMAppHideUtil *me = new ( ELeave ) CAMAppHideUtil();

    CleanupStack::PushL(me);

    me->ConstructL();

    CleanupStack::Pop(me);

    return me;

    }

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

// CAMAppHideUtil::AddUidL(const TUid& aUid )

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

void CAMAppHideUtil::AddUidL(const TUid& aUid, TBool aPersist /*= EFalse */)

    {

    TInt idx(iHiddenUids.Find(aUid));

    if (idx == KErrNotFound)

        {

        TInt err(iHiddenUids.Append(aUid) );

        if (err == KErrNone)

            {

            iChanged = ETrue;

            if (aPersist)

                {

                PersistUidsL();

                }

            }

        else

            {

            RDEBUG_2( "Failed to append uid to hidden list: %d", err );

            }

        }

    }

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

// CAMAppHideUtil::RemoveUidL( const TUid& aUid )

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

void CAMAppHideUtil::RemoveUidL(const TUid& aUid, TBool aPersist /*= EFalse */)

    {

    TInt idx(iHiddenUids.Find(aUid));

    if (idx != KErrNotFound)

        {

        iHiddenUids.Remove(idx);

        iChanged = ETrue;

        if (aPersist)

            {

            PersistUidsL();

            }

        }

    }

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

// CAMAppHideUtil::PersistUid( const TUid &aUid, TDes &aBuf, TBool aHasMore )

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

void CAMAppHideUtil::PersistUid(const TUid &aUid, TDes &aBuf, TBool aHasMore) const

    {

    aBuf.AppendNumFixedWidth(aUid.iUid, EHex, 8);

    if (aHasMore)

        {

        aBuf.Append(KUidDelimiter);

        }

    }

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

// CAMAppHideUtil::PersistUidsL()

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

void CAMAppHideUtil::PersistUidsL()

    {

    if (iChanged)

        {

        TBuf<NCentralRepositoryConstants::KMaxUnicodeStringLength> buf;

        RDEBUG_2( "PersistUids: count %d", iHiddenUids.Count() );

        for (TInt i(iHiddenUids.Count() - 1); i >= 0; --i)

            {

            RDEBUG_3( "PersistUids: cur %d %x", i,iHiddenUids[i].iUid );

            PersistUid(iHiddenUids[i], buf, i > 0) ;

            }

        CRepository *rep = CRepository::NewLC(KCRUidMenu);

        TInt err(rep->Set(KMenuHideApplication, buf) );

        CleanupStack::PopAndDestroy(rep);

        if (err != KErrNone)

            {

            RDEBUG_2( "PersistUids: ERROR failed to set key: %d", err );

            User::Leave(err);

            }

        RDEBUG_2( "CAMAppHideUtil::PersistUidsL - Saved '%S'", &buf);

        iChanged = EFalse;

        }

    }

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

// CAMAppHideUtil::ParseUid( TLex &, TUid &aUid ) 

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

TInt CAMAppHideUtil::ParseUid(TLex &aLex, TUid &aUid) const

    {

    aUid = TUid::Null();

    aLex.Mark();

    while (aLex.Peek().IsHexDigit() )

        {

        aLex.Inc();

        }

    TPtrC uidToken = aLex.MarkedToken();

    TLex uidLex(uidToken);

    TInt err(uidLex.Val( (TUint32& )aUid.iUid, EHex) );

    return err;

    }

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

// CAMAppHideUtil::SkipDelim( TLex & )

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

TBool CAMAppHideUtil::SkipDelim(TLex &aLex) const

    {

    TBool ret(EFalse);

    if (aLex.Peek() == KUidDelimiter)

        {

        aLex.Inc();

        ret = ETrue;

        }

    return (ret );

    }

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

// CAMAppHideUtil::LoadUidsL()

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

void CAMAppHideUtil::LoadUidsL()

    {

    CRepository *rep = CRepository::NewLC(KCRUidMenu);

    TBuf<NCentralRepositoryConstants::KMaxUnicodeStringLength> buf;

    TInt err(rep->Get(KMenuHideApplication, buf) );

    CleanupStack::PopAndDestroy(rep);

    if (err == KErrNone)

        {

        RDEBUG_2( "CAMAppHideUtil::LoadUidsL - Loading '%S'", &buf);

        TLex lex(buf);

        TUid aUid(TUid::Null());

        do

            {

            err = ParseUid(lex, aUid) ;

            }

        while (err == KErrNone && iHiddenUids.Append(aUid) == KErrNone

                && !lex.Eos() && SkipDelim(lex) );

        }

    RDEBUG_2( "CAMAppHideUtil::LoadUidsL-Loaded (last parsing status: %d)", err);

    }

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

// CAMAppHideUtil::Reset()

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

void CAMAppHideUtil::Reset()

    {

    if (iHiddenUids.Count() > 0)

        {

        iChanged = ETrue;

        }

    iHiddenUids.Reset();

    }

// End of File