/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** 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: http://www.gnu.org/copyleft/gpl.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#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