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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 plugins 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.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QWINDOWSMIME_H
#define QWINDOWSMIME_H

#include "qtwindows_additional.h"

#include <QtCore/QVector>
#include <QtCore/QList>
#include <QtCore/QVariant>
#include <QtCore/QSharedPointer>

QT_BEGIN_NAMESPACE

class QMimeData;

class QWindowsMime
{
    Q_DISABLE_COPY(QWindowsMime)
public:
    QWindowsMime();
    virtual ~QWindowsMime();

    // for converting from Qt
    virtual bool canConvertFromMime(const FORMATETC &formatetc, const QMimeData *mimeData) const = 0;
    virtual bool convertFromMime(const FORMATETC &formatetc, const QMimeData *mimeData, STGMEDIUM * pmedium) const = 0;
    virtual QVector<FORMATETC> formatsForMime(const QString &mimeType, const QMimeData *mimeData) const = 0;

    // for converting to Qt
    virtual bool canConvertToMime(const QString &mimeType, IDataObject *pDataObj) const = 0;
    virtual QVariant convertToMime(const QString &mimeType, IDataObject *pDataObj, QVariant::Type preferredType) const = 0;
    virtual QString mimeForFormat(const FORMATETC &formatetc) const = 0;

    static int registerMimeType(const QString &mime);
};

class QWindowsMimeConverter
{
    Q_DISABLE_COPY(QWindowsMimeConverter)
public:
    QWindowsMimeConverter();
    ~QWindowsMimeConverter();

    QWindowsMime *converterToMime(const QString &mimeType, IDataObject *pDataObj) const;
    QStringList allMimesForFormats(IDataObject *pDataObj) const;
    QWindowsMime *converterFromMime(const FORMATETC &formatetc, const QMimeData *mimeData) const;
    QVector<FORMATETC> allFormatsForMime(const QMimeData *mimeData) const;

    // Convenience.
    QVariant convertToMime(const QStringList &mimeTypes, IDataObject *pDataObj, QVariant::Type preferredType,
                           QString *format = 0) const;

private:
    typedef QSharedPointer<QWindowsMime> MimePtr;

    void ensureInitialized() const;

    mutable QList<QWindowsMime *> m_mimes;
};

QT_END_NAMESPACE

#endif // QWINDOWSMIME_H