/*

* Copyright (c) 2008 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:  This is the implementation of application class

*

*/

#include <e32std.h>

#include <e32uid.h>

#include <e32svr.h>

#include <ecom/ecom.h>

#include <ecom/implementationinformation.h>

#include "hidinterfaces.h"

#include "decode.h"

#include "layout.h"

#include "library.h"

#include "debug.h"

CLayoutLibrary* CLayoutLibrary::NewL()

    {

    CLayoutLibrary* self = new (ELeave) CLayoutLibrary;

    // No two phase construction required

    return self;

    }

CLayoutLibrary::CLayoutLibrary()

        : iId(0), iLoaded(EFalse), iLayout(0)

    {

    // Nothing else to do

    }

CLayoutLibrary::~CLayoutLibrary()

    {

    TRACE_INFO( (_L("[HID]\t~CLayoutLibrary() 0x%08x"), this));

    delete iLayout;

    if (iLoaded)

        {

        iLoaded = EFalse;

        iId = 0;

        }

    REComSession::FinalClose();

    }

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

TInt CLayoutLibrary::SetLayout(TInt aId)

    {

    TInt err = KErrNone;

    TBool foundLayout = EFalse;

    // Implementation info array

    RImplInfoPtrArray implInfoArray;

    TRACE_INFO( (_L("[HID]\tCLayoutLibrary::SetLayout: id=%d"), aId));

    if( aId == iId )

        {

        TRACE_INFO( (_L("[HID]\tCLayoutLibrary::SetLayout: Same layout id=%d, don't load twice"), aId));

        return KErrNone;

        }

    // Plain ignore is enough. If listing leaves, the array is just empty.

    TRAP_IGNORE( REComSession::ListImplementationsL( KHidLayoutPluginInterfaceUid, implInfoArray ) );

    TRACE_INFO( (_L("[HID]\tCLayoutLibrary::SetLayout: %d plugins listed"),implInfoArray.Count() ));

    if ( 0 == implInfoArray.Count())

        {

        TRACE_INFO( (_L("[HID]\tCLayoutLibrary::SetLayout: No Drivers found")));

        err = KErrNotFound;

        }

    else

        {

        for (TInt i=0; i<implInfoArray.Count() && !foundLayout; i++)

            {

            // parse implementation UID

            CImplementationInformation* info = implInfoArray[ i ];

            TUid implUid = info->ImplementationUid();

            TRACE_INFO( (_L("[HID]\tCLayoutLibrary::SetLayout: load plugin 0x%08x"),implUid ));

            // load driver

            // Trap so other drivers will be enumerated even if

            // this fails:

            CHidLayoutPluginInterface* plugin = NULL;

            TRAPD( err,

                   plugin = CHidLayoutPluginInterface::NewL( implUid );

                   TRACE_INFO( (_L("[HID]\tCLayoutLibrary::SetLayout: plugin loaded")));

                 );

            if( err == KErrNone)

                {

                CKeyboardLayout* layout = reinterpret_cast<CKeyboardLayout*>(plugin);

                if (aId == layout->LayoutId())

                    {

                    TRACE_INFO( (_L("[HID]\tCLayoutLibrary::SetLayout: Found layout %d!"), aId));

                    foundLayout = ETrue;

                    // Swap the current layout object:

                    CKeyboardLayout* tmpLayout = iLayout;

                    iLayout = layout;

                    iId = aId;

                    iLoaded = ETrue;

                    TRACE_INFO( (_L("[HID]\tCLayoutLibrary::SetLayout: delete old layout")));

                    delete tmpLayout;

                    }

                else

                    {

                    TRACE_INFO( (_L("[HID]\tCLayoutLibrary::SetLayout: wrong layout, delete plugin")));

                    delete plugin;

                    }

                }

            else

                {

                TRACE_INFO( (_L("[HID]\tCLayoutLibrary::SetLayout: plugin creation failed")));

                }

            }// end of for loop

        }

    if( !foundLayout )

        {

        TRACE_INFO( (_L("[HID]\tCLayoutLibrary::SetLayout: NO PLUGIN FOUND")));

        }

    TRACE_INFO( (_L("[HID]\tCLayoutLibrary::SetLayout: Plugin listing ready, delete info array")));

    implInfoArray.ResetAndDestroy();

    implInfoArray.Close();

    return err;

    }

// End of file