/*

* Copyright (c) 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:

*

*/

#include <apgwgnam.h>

#include "menutasklist.h"

CMenuTaskList* CMenuTaskList::NewL(RWsSession& aWsSession)

    {

    CMenuTaskList* self = NewLC(aWsSession);

    CleanupStack::Pop(self);

    return self;

    }

CMenuTaskList* CMenuTaskList::NewLC(RWsSession& aWsSession)

    {

    CMenuTaskList* self = new(ELeave) CMenuTaskList(aWsSession);

    CleanupStack::PushL(self);

    self->ConstructL();

    return self;

    }

CMenuTaskList::CMenuTaskList(RWsSession& aWsSession)

: iWs(aWsSession)

    {

    }

void CMenuTaskList::ConstructL()

    {

    UpdateListL();

    }

CMenuTaskList::~CMenuTaskList()

    {

    iWgs.Close();

    }

void CMenuTaskList::UpdateListL()

    {

    User::LeaveIfError(iWs.WindowGroupList(&iWgs));

    }

TApaTask CMenuTaskList::FindRootApp(TUid aAppUid) const

    {

    TApaTask task(iWs);

    task.SetWgId(0);        // initialise task to non-existant task

    // wgId = 0 tells FindAppByUid to start looking for apps

    TInt wgId=0;

    FOREVER

        {

        CApaWindowGroupName::FindByAppUid(aAppUid, iWs, wgId);

        // KErrNotFound means that no more apps can be found

        if (wgId == KErrNotFound)

            break;

        if (IsRootWindowGroup(wgId))

            {

            // Found a root wg with the right app UID, return it.

            task.SetWgId(wgId);

            break;

            }

        }

    return task;

    }

TBool CMenuTaskList::IsRootWindowGroup(TInt aWgId) const

    {

    TInt count = iWgs.Count();

    for (TInt ii=0; ii<count; ii++)

        {

        const RWsSession::TWindowGroupChainInfo& info = iWgs[ii];

        // find the window group id and check that it has no parent

        if (info.iId == aWgId)

            return (info.iParentId <= 0);

        }

    return EFalse;

    }