/*

* 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:  The private implementation of AlfHostAPI.

*

*/

#include "alfhostapiimpl.h"

#include <alf/alfwidgetcontrol.h>

#include <alf/ialflayoutmanager.h>

#include <alf/alfexceptions.h>

namespace Alf

    {

AlfHostAPIImpl::AlfHostAPIImpl(): mBaseLayout(NULL), mHostControl(NULL)

    {

    }

AlfHostAPIImpl::~AlfHostAPIImpl()

    {

    }

OSN_EXPORT IAlfInterfaceBase* AlfHostAPIImpl::makeInterface(

    const IfId& aType )

    {

    UString param(aType.mImplementationId);

    if ( param == IAlfHostAPI::type().mImplementationId )

        {

        return static_cast<IAlfHostAPI*>( this );

        }

    return 0;

    }

void AlfHostAPIImpl::setHostControl(CAlfWidgetControl& aControl)

    {

    mHostControl = &aControl;

    }

void AlfHostAPIImpl::setConnection(CAlfWidgetControl& aControl, AlfRole aRole)

    {

    if (mHostControl)

        {

        // Remove previous host connection from connected control

        if(aControl.Host())

            {

            CAlfWidgetControl* parentControl = dynamic_cast<CAlfWidgetControl*>(aControl.Host());

            if(parentControl)

                {

                parentControl->hostAPI().removeConnection(aControl);

                }

            }

        // Add connection from host control to connected control

        TRAPD(err, mHostControl->AddConnectionL(&aControl,aRole));

        if(err != KErrNone)

            {

            ALF_THROW(AlfException, err, "AlfHostAPIImpl::setConnection() - AddConnectionL() failed.");

            }        

        // Update layout of host control if a child control was connected

        if (aRole == EChild && mBaseLayout.get())

            {

            mBaseLayout->updateChildLayout(&aControl);

            }

        }

    }

CAlfWidgetControl* AlfHostAPIImpl::getConnection(int aIndex) const

    {

    if (mHostControl)

    	{

    	//AlfControl doesn't perform bound checks.

    	if (aIndex >=0 && aIndex < mHostControl->ConnectionCount()) 

    		{

    		return (static_cast<CAlfWidgetControl*>(&(mHostControl->Connection(aIndex)))); 

    		}

    	}

    return 0; //NULL is not defined in osncore

    }

int AlfHostAPIImpl::getConnectionCount() const

    {

    int connectionCount = 0;

    if (mHostControl)

        {

        connectionCount = mHostControl->ConnectionCount();

        }

    return connectionCount;

    }

int AlfHostAPIImpl::getConnectionIndex(CAlfWidgetControl& aControl) const

    {

    return mHostControl->FindConnection(&aControl);

    }

void AlfHostAPIImpl::removeConnection(CAlfWidgetControl& aControl)

    {

    if (mHostControl)

        {

        mHostControl->RemoveConnection(&aControl);  

        if (getBaseLayout())

            {

            getBaseLayout()->childRemoved(&aControl);

            }

        }

    }

void AlfHostAPIImpl::setBaseLayout(IAlfLayoutManager& aLayout)

    {

    if(mHostControl)

    	{

        mBaseLayout.reset(&aLayout);

        mBaseLayout->createLayout(*mHostControl, 0, 0);

        }

    }

IAlfLayoutManager* AlfHostAPIImpl::getBaseLayout() const

    {

    return mBaseLayout.get();

    }

    } //namespace alf