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qmime.h

/****************************************************************************
**
** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
**
** This file is part of the QtGui module of the Qt Toolkit.
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** License versions 2.0 or 3.0 as published by the Free Software
** Foundation and appearing in the files LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file.  Alternatively you may (at
** your option) use any later version of the GNU General Public
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** (or its successors, if any) and the KDE Free Qt Foundation. In
** addition, as a special exception, Trolltech gives you certain
** additional rights. These rights are described in the Trolltech GPL
** Exception version 1.1, which can be found at
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** GPL_EXCEPTION.txt in this package.
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****************************************************************************/

#ifndef QMIME_H
#define QMIME_H

#include <QtCore/qmimedata.h>

QT_BEGIN_HEADER

QT_MODULE(Gui)

00053 class Q_GUI_EXPORT QMimeSource
{
public:
    virtual ~QMimeSource();
    virtual const char* format(int n = 0) const = 0;
    virtual bool provides(const char*) const;
    virtual QByteArray encodedData(const char*) const = 0;
};


#if defined(Q_WS_WIN)

typedef struct tagFORMATETC FORMATETC;
typedef struct tagSTGMEDIUM STGMEDIUM;
struct IDataObject;

#include <QtCore/qvariant.h>

/*
  Encapsulation of conversion between MIME and Windows CLIPFORMAT.
  Not need on X11, as the underlying protocol uses the MIME standard
  directly.
*/

class Q_GUI_EXPORT 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);

private:
    friend class QClipboardWatcher;
    friend class QDragManager;
    friend class QDropData;
    friend class QOleDataObject;

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

#endif
#if defined(Q_WS_MAC)

/*
  Encapsulation of conversion between MIME and Mac flavor.
  Not needed on X11, as the underlying protocol uses the MIME standard
  directly.
*/

class Q_GUI_EXPORT QMacMime { //Obsolete
    char type;
public:
    enum QMacMimeType { MIME_DND=0x01, MIME_CLIP=0x02, MIME_QT_CONVERTOR=0x04, MIME_ALL=MIME_DND|MIME_CLIP };
    explicit QMacMime(char) { }
    virtual ~QMacMime() { }

    static void initialize() { }

    static QList<QMacMime*> all(QMacMimeType) { return QList<QMacMime*>(); }
    static QMacMime *convertor(QMacMimeType, const QString &, int) { return 0; }
    static QString flavorToMime(QMacMimeType, int) { return QString(); }

    virtual QString convertorName()=0;
    virtual int countFlavors()=0;
    virtual int flavor(int index)=0;
    virtual bool canConvert(const QString &mime, int flav)=0;
    virtual QString mimeFor(int flav)=0;
    virtual int flavorFor(const QString &mime)=0;
    virtual QVariant convertToMime(const QString &mime, QList<QByteArray> data, int flav)=0;
    virtual QList<QByteArray> convertFromMime(const QString &mime, QVariant data, int flav)=0;
};

class Q_GUI_EXPORT QMacPasteboardMime {
    char type;
public:
    enum QMacPasteboardMimeType { MIME_DND=0x01,
                                  MIME_CLIP=0x02,
                                  MIME_QT_CONVERTOR=0x04,
                                  MIME_QT3_CONVERTOR=0x08,
                                  MIME_ALL=MIME_DND|MIME_CLIP
    };
    explicit QMacPasteboardMime(char);
    virtual ~QMacPasteboardMime();

    static void initialize();

    static QList<QMacPasteboardMime*> all(uchar);
    static QMacPasteboardMime *convertor(uchar, const QString &mime, QString flav);
    static QString flavorToMime(uchar, QString flav);

    virtual QString convertorName() = 0;

    virtual bool canConvert(const QString &mime, QString flav) = 0;
    virtual QString mimeFor(QString flav) = 0;
    virtual QString flavorFor(const QString &mime) = 0;
    virtual QVariant convertToMime(const QString &mime, QList<QByteArray> data, QString flav) = 0;
    virtual QList<QByteArray> convertFromMime(const QString &mime, QVariant data, QString flav) = 0;
};

#endif // Q_WS_MAC

QT_END_HEADER

#endif // QMIME_H

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