/*

* 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 <cppluginloader.h>

#include <QString>

#include <QDir>

#include <QFileInfo>

#include <QPluginLoader>

#include <cpplugininterface.h>

#include <cplauncherinterface.h>

#include "cputility.h"

#include <cplogger.h>

/*!

    \class CpPluginLoader

    \brief The CpPluginLoader class loads a controlpanel plugin at run-time.

 */

#ifdef WIN32

    #define PLUGINFILE_SUFFIX "dll"

#else

    #define PLUGINFILE_SUFFIX "qtplugin"

#endif

template <typename INTERFACE>

static INTERFACE* loadPluginInterface(const QString &pluginFile)

{

    CPPERF_LOG( QLatin1String("Loading plugin: ") + pluginFile );

    QFileInfo fileInfo(pluginFile);

    if (!fileInfo.isAbsolute()) {

        QString fileName = fileInfo.fileName();

        if (fileInfo.suffix().compare(PLUGINFILE_SUFFIX,Qt::CaseInsensitive)) {

            fileName = fileInfo.baseName() + '.' + PLUGINFILE_SUFFIX;

        }

		QStringList pluginDirs = CpUtility::pluginDirectories();

		foreach(const QString &pluginDir,pluginDirs) {

			fileInfo.setFile(pluginDir + fileName);

			if (fileInfo.exists() && QLibrary::isLibrary(fileInfo.absoluteFilePath())) {

			    CPPERF_LOG( QLatin1String("Valid plugin stub found: ") + fileInfo.absoluteFilePath() );

				break;

			}

		}

    }

	QPluginLoader loader(fileInfo.absoluteFilePath());

	INTERFACE *plugin = qobject_cast<INTERFACE*> (loader.instance());

	if (!plugin) {

		loader.unload();

	}

	CPPERF_LOG( QLatin1String("Load plugin ") + (plugin ? QLatin1String("succeed.") : QLatin1String("failed.")) );

    return plugin;

}

/*!

    load a CpPluginInterface by plugin file.

    the plugin file can either absoulte file path or only file name.

    acceptable format:

        sampleplugin

        sampleplugin.qtplugin

        sampleplugin.dll

        C:/resource/qt/plugins/controlpanel/sampleplugin.qtplugin

        C:/resource/qt/plugins/controlpanel/sampleplugin.dll

 */

CpPluginInterface *CpPluginLoader::loadCpPluginInterface(const QString &pluginFile)

{

    return ::loadPluginInterface<CpPluginInterface>(pluginFile);

}

/*!

    load a CpLauncherInterface by plugin file.

    the plugin file can either absoulte file path or only file name.

    acceptable format:

        sampleplugin

        sampleplugin.qtplugin

        sampleplugin.dll

        C:/resource/qt/plugins/controlpanel/sampleplugin.qtplugin

        C:/resource/qt/plugins/controlpanel/sampleplugin.dll

 */

CpLauncherInterface *CpPluginLoader::loadCpLauncherInterface(const QString &pluginFile)

{

    return ::loadPluginInterface<CpLauncherInterface>(pluginFile);    

}