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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** 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 Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/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 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.
**
** In addition, as a special exception, Digia gives you certain additional
** rights.  These rights are described in the Digia Qt 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 "qstylefactory.h"
#include "qstyleplugin.h"
#include "private/qfactoryloader_p.h"
#include "qmutex.h"

#include "qapplication.h"
#include "qwindowsstyle.h"
#ifndef QT_NO_STYLE_FUSION
#include "qfusionstyle_p.h"
#endif
#ifndef QT_NO_STYLE_GTK
#include "qgtkstyle_p.h"
#endif
#ifndef QT_NO_STYLE_WINDOWSXP
#include "qwindowsxpstyle.h"
#endif
#ifndef QT_NO_STYLE_WINDOWSVISTA
#include "qwindowsvistastyle_p.h"
#endif
#ifndef QT_NO_STYLE_WINDOWSCE
#include "qwindowscestyle.h"
#endif
#ifndef QT_NO_STYLE_WINDOWSMOBILE
#include "qwindowsmobilestyle.h"
#endif

#if !defined(QT_NO_STYLE_MAC) && defined(Q_OS_MAC)
#  include "qmacstyle_mac.h"
#endif

QT_BEGIN_NAMESPACE

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

/*!
    \class QStyleFactory
    \brief The QStyleFactory class creates QStyle objects.

    \ingroup appearance
    \inmodule QtWidgets

    The QStyle class is an abstract base class that encapsulates the
    look and feel of a GUI. QStyleFactory creates a QStyle object
    using the create() function and a key identifying the style. The
    styles are either built-in or dynamically loaded from a style
    plugin (see QStylePlugin).

    The valid keys can be retrieved using the keys()
    function. Typically they include "windows" and "fusion".
    Depending on the platform, "windowsxp", "windowsvista", "gtk"
    and "macintosh" may be available.
    Note that keys are case insensitive.

    \sa QStyle
*/

/*!
    Creates and returns a QStyle object that matches the given \a key, or
    returns 0 if no matching style is found.

    Both built-in styles and styles from style plugins are queried for a
    matching style.

    \note The keys used are case insensitive.

    \sa keys()
*/
QStyle *QStyleFactory::create(const QString& key)
{
    QStyle *ret = 0;
    QString style = key.toLower();
#ifndef QT_NO_STYLE_WINDOWS
    if (style == QLatin1String("windows"))
        ret = new QWindowsStyle;
    else
#endif
#ifndef QT_NO_STYLE_WINDOWSCE
    if (style == QLatin1String("windowsce"))
        ret = new QWindowsCEStyle;
    else
#endif
#ifndef QT_NO_STYLE_WINDOWSMOBILE
    if (style == QLatin1String("windowsmobile"))
        ret = new QWindowsMobileStyle;
    else
#endif
#ifndef QT_NO_STYLE_WINDOWSXP
    if (style == QLatin1String("windowsxp"))
        ret = new QWindowsXPStyle;
    else
#endif
#ifndef QT_NO_STYLE_WINDOWSVISTA
    if (style == QLatin1String("windowsvista"))
        ret = new QWindowsVistaStyle;
    else
#endif
#ifndef QT_NO_STYLE_FUSION
    if (style == QLatin1String("fusion"))
        ret = new QFusionStyle;
    else
#endif
#ifndef QT_NO_STYLE_GTK
    if (style == QLatin1String("gtk") || style == QLatin1String("gtk+"))
        ret = new QGtkStyle;
    else
#endif
#ifndef QT_NO_STYLE_MAC
    if (style.startsWith(QLatin1String("macintosh"))) {
        ret = new QMacStyle;
#  ifdef Q_WS_MAC
        if (style == QLatin1String("macintosh"))
            style += QLatin1String(" (aqua)");
#  endif
    } else
#endif
    { } // Keep these here - they make the #ifdefery above work
#ifndef QT_NO_LIBRARY
    if (!ret)
        ret = qLoadPlugin<QStyle, QStylePlugin>(loader(), style);
#endif
    if(ret)
        ret->setObjectName(style);
    return ret;
}

/*!
    Returns the list of valid keys, i.e. the keys this factory can
    create styles for.

    \sa create()
*/
QStringList QStyleFactory::keys()
{
    QStringList list;
#ifndef QT_NO_LIBRARY
    typedef QMultiMap<int, QString> PluginKeyMap;

    const PluginKeyMap keyMap = loader()->keyMap();
    const PluginKeyMap::const_iterator cend = keyMap.constEnd();
    for (PluginKeyMap::const_iterator it = keyMap.constBegin(); it != cend; ++it)
        list.append(it.value());
#endif
#ifndef QT_NO_STYLE_WINDOWS
    if (!list.contains(QLatin1String("Windows")))
        list << QLatin1String("Windows");
#endif
#ifndef QT_NO_STYLE_WINDOWSCE
    if (!list.contains(QLatin1String("WindowsCE")))
        list << QLatin1String("WindowsCE");
#endif
#ifndef QT_NO_STYLE_WINDOWSMOBILE
    if (!list.contains(QLatin1String("WindowsMobile")))
        list << QLatin1String("WindowsMobile");
#endif
#ifndef QT_NO_STYLE_WINDOWSXP
    if (!list.contains(QLatin1String("WindowsXP")) &&
        (QSysInfo::WindowsVersion >= QSysInfo::WV_XP && (QSysInfo::WindowsVersion & QSysInfo::WV_NT_based)))
        list << QLatin1String("WindowsXP");
#endif
#ifndef QT_NO_STYLE_WINDOWSVISTA
    if (!list.contains(QLatin1String("WindowsVista")) &&
        (QSysInfo::WindowsVersion >= QSysInfo::WV_VISTA && (QSysInfo::WindowsVersion & QSysInfo::WV_NT_based)))
        list << QLatin1String("WindowsVista");
#endif
#ifndef QT_NO_STYLE_GTK
    if (!list.contains(QLatin1String("GTK+")))
        list << QLatin1String("GTK+");
#endif
#ifndef QT_NO_STYLE_FUSION
    if (!list.contains(QLatin1String("Fusion")))
        list << QLatin1String("Fusion");
#endif
#ifndef QT_NO_STYLE_MAC
    QString mstyle = QLatin1String("Macintosh");
# ifdef Q_WS_MAC
    mstyle += QLatin1String(" (aqua)");
# endif
    if (!list.contains(mstyle))
        list << mstyle;
#endif
    return list;
}

QT_END_NAMESPACE