/*

* 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:  HsWidget factory.

*

*/

#include <QStringList>

#include <QDir>

#include <QPluginLoader>

#include "hswidgetfactory.h"

#include "hswidgetfactory_p.h"

#include "hswidget.h"

#include "hswidgetprovidermanifest.h"

#include "hstest_global.h"

/*!

    \class HsPluginUnloader

    \ingroup group_hswidgetmodel

    \brief Unloads plugin and deletes plugin loader.

    Holds plugin loader instance and unloads and destroys plugin

    on it's destructor. 

*/

/*!

    \fn HsPluginUnloader::HsPluginUnloader(QPluginLoader *pluginLoader,QObject *parent)

    Constructs plugin unloader object. When this object is destroyed it 

    unloads it's pointed \a pluginLoader instance.

*/

HsPluginUnloader::HsPluginUnloader(QPluginLoader *pluginLoader,QObject *parent)

    :QObject(parent),mPluginLoader(pluginLoader)

{

}

/*!

    \fn HsPluginUnloader::~HsPluginUnloader()

    Unloads it's plugin loader instance.

*/

HsPluginUnloader::~HsPluginUnloader()

{

    if(mPluginLoader) {

        mPluginLoader->unload();

        delete mPluginLoader; 

    }

}

/*!

    \class HsWidgetFactory 

    \ingroup group_hswidgetmodel

    \brief Finds and creates home screen widgets.

    HsWidget factory creates an instance of

    a widget base on a widget token that is given to it.

*/

HsWidgetFactoryPrivate::HsWidgetFactoryPrivate(HsWidgetFactory *factory):

    mPublic(factory)

{

}

HsWidgetFactoryPrivate::~HsWidgetFactoryPrivate()

{

}

HsWidget* HsWidgetFactoryPrivate::createWidget(const HsWidgetToken &token)

{

   QPluginLoader* loader = new QPluginLoader(token.mLibrary);

   QObject* plugin = loader->instance();

   IHsWidgetProvider* provider = qobject_cast<IHsWidgetProvider*>(plugin);

   HsWidget* widget(0);

   if (provider) {

       widget = provider->createWidget(token);

       if (!widget) {

          HSDEBUG("Widget creation failed.")

          loader->unload();

          delete loader;

       }

       else {

           HsPluginUnloader* p = new HsPluginUnloader(loader);

           p->connect(widget,SIGNAL(destroyed()),SLOT(deleteLater()));

       }

    }

   else {

        HSDEBUG("Widget creation failed - No provider.")

        loader->unload();

        delete loader;

   }

    return widget;

}

/*!

    Constructor

*/

HsWidgetFactory::HsWidgetFactory(QObject *parent)

    : QObject(parent),mD(new HsWidgetFactoryPrivate(this))

{

}

/*!

    Destructor

*/

HsWidgetFactory::~HsWidgetFactory()

{

    delete mD;

}

/*!

    Creates and returns a widget based on given \a token

*/

HsWidget* HsWidgetFactory::createWidget(const HsWidgetToken &token)

{

    return mD->createWidget(token);

}