/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: Nokia Corporation (qt-info@nokia.com)
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** This file is part of the QtGui module of the Qt Toolkit.
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** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
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** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
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** $QT_END_LICENSE$
**
****************************************************************************/

#include "qdecorationfactory_qws.h"
#include "qdecorationplugin_qws.h"
#include "private/qfactoryloader_p.h"
#include "qmutex.h"

#include "qapplication.h"
#include "qdecorationdefault_qws.h"
#include "qdecorationwindows_qws.h"
#include "qdecorationstyled_qws.h"

QT_BEGIN_NAMESPACE

#ifndef QT_NO_LIBRARY
Q_GLOBAL_STATIC_WITH_ARGS(QFactoryLoader, loader,
    (QDecorationFactoryInterface_iid,
     QLatin1String("/decorations"), Qt::CaseInsensitive))
#endif



/*!
    \class QDecorationFactory
    \ingroup qws
    \ingroup appearance

    \brief The QDecorationFactory class creates window decorations in
    Qt for Embedded Linux.

    Note that this class is only available in \l{Qt for Embedded Linux}.

    QDecorationFactory is used to detect and instantiate the available
    decorations, allowing \l{Qt for Embedded Linux} to load the preferred
    decoration into the application at runtime. The create() function
    returns a QDecoration object representing the decoration
    identified by a given key. The valid keys (i.e. the supported
    decorations) can be retrieved using the keys() function.

    \l{Qt for Embedded Linux} provides three built-in decorations: \c Default,
    \c Styled and \c Windows. In addition, custom decorations can be
    added using Qt's \l {How to Create Qt Plugins}{plugin mechanism},
    i.e. by subclassing the QDecoration class and creating a mouse
    driver plugin (QDecorationPlugin).

    \sa QDecoration, QDecorationPlugin
*/

/*!
    Creates the decoration specified by the given \a key. Note that
    the keys are case-insensitive.

    \sa keys()
*/

QDecoration *QDecorationFactory::create(const QString& key)
{
    QDecoration *ret = 0;
    QString decoration = key.toLower();
#ifndef QT_NO_QWS_DECORATION_DEFAULT
    if (decoration == QLatin1String("default"))
        ret = new QDecorationDefault;
    else
#endif
#ifndef QT_NO_QWS_DECORATION_WINDOWS
    if (decoration == QLatin1String("windows"))
        ret = new QDecorationWindows;
    else
#endif
#ifndef QT_NO_QWS_DECORATION_STYLED
    if (decoration == QLatin1String("styled"))
        ret = new QDecorationStyled;
    else
#endif
    { } // Keep these here - they make the #ifdefery above work
#ifndef QT_NO_LIBRARY
    if (!ret) {
        if (QDecorationFactoryInterface *factory = qobject_cast<QDecorationFactoryInterface*>(loader()->instance(decoration))) {
            ret = factory->create(decoration);
        }
    }
#endif
    return ret;
}

/*!
    Returns the list of valid keys, i.e., the available decorations.

    \sa create()
*/
QStringList QDecorationFactory::keys()
{
    QStringList list;
#ifndef QT_NO_QWS_DECORATION_STYLED
    list << QLatin1String("Styled");
#endif
#ifndef QT_NO_QWS_DECORATION_DEFAULT
    list << QLatin1String("Default");
#endif
#ifndef QT_NO_QWS_DECORATION_WINDOWS
    list << QLatin1String("Windows");
#endif

#if !defined(Q_OS_WIN32) || defined(QT_MAKEDLL)
#ifndef QT_NO_LIBRARY
    QStringList plugins = loader()->keys();
    for (int i = 0; i < plugins.size(); ++i) {
        if (!list.contains(plugins.at(i)))
            list += plugins.at(i);
    }
#endif //QT_NO_LIBRARY
#endif //QT_MAKEDLL

    return list;
}

QT_END_NAMESPACE