Refactor: split QMacMime registry and virtual interface

The logic for registration of converter implementations is only used
internally through static functions. Move those, and related global
functions, to a QMacMimeRegistry namespace.

Reduce the QMacInternalPasteboardMime to the abstract interface for
converting between native and Qt clipboard data.

Historically, mime converters can have different "types"; make that API
type-safe.

Task-number: QTBUG-93632
Change-Id: I0e16fefa350398b693486199fe10357fd84abcd6
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>

15 files changed, 270 insertions, 191 deletions

diff --git a/src/gui/CMakeLists.txt b/src/gui/CMakeLists.txt
index 1dd7bb3c30..85c14f39ab 100644
--- a/src/gui/CMakeLists.txt
+++ b/src/gui/CMakeLists.txt
@@ -389,6 +389,7 @@ qt_internal_extend_target(Gui CONDITION APPLE
         painting/qcoregraphics.mm painting/qcoregraphics_p.h
         painting/qrasterbackingstore.cpp painting/qrasterbackingstore_p.h
         painting/qrhibackingstore.cpp painting/qrhibackingstore_p.h
+        platform/darwin/qmacmimeregistry.mm platform/darwin/qmacmimeregistry_p.h
         platform/darwin/qmacmime.mm platform/darwin/qmacmime_p.h
         platform/darwin/qapplekeymapper.mm platform/darwin/qapplekeymapper_p.h
         text/coretext/qcoretextfontdatabase.mm text/coretext/qcoretextfontdatabase_p.h
diff --git a/src/gui/platform/darwin/qmacmime.mm b/src/gui/platform/darwin/qmacmime.mm
index 6cb60bec53..f5b571af1d 100644
--- a/src/gui/platform/darwin/qmacmime.mm
+++ b/src/gui/platform/darwin/qmacmime.mm
@@ -20,6 +20,7 @@
 #endif
 
 #include "qmacmime_p.h"
+#include "qmacmimeregistry_p.h"
 #include "qguiapplication.h"
 #include "private/qcore_mac_p.h"
 
@@ -27,47 +28,6 @@ QT_BEGIN_NAMESPACE
 
 using namespace Qt::StringLiterals;
 
-typedef QList<QMacInternalPasteboardMime*> MimeList;
-Q_GLOBAL_STATIC(MimeList, globalMimeList)
-Q_GLOBAL_STATIC(QStringList, globalDraggedTypesList)
-
-void qt_mac_addToGlobalMimeList(QMacInternalPasteboardMime *macMime)
-{
-    // globalMimeList is in decreasing priority order. Recently added
-    // converters take prioity over previously added converters: prepend
-    // to the list.
-    globalMimeList()->prepend(macMime);
-}
-
-void qt_mac_removeFromGlobalMimeList(QMacInternalPasteboardMime *macMime)
-{
-    if (!QGuiApplication::closingDown())
-        globalMimeList()->removeAll(macMime);
-}
-
-/*!
-    \fn void qRegisterDraggedTypes(const QStringList &types)
-    \relates QMacPasteboardMime
-
-    Registers the given \a types as custom pasteboard types.
-
-    This function should be called to enable the Drag and Drop events
-    for custom pasteboard types on Cocoa implementations. This is required
-    in addition to a QMacPasteboardMime subclass implementation. By default
-    drag and drop is enabled for all standard pasteboard types.
-
-   \sa QMacPasteboardMime
-*/
-void qt_mac_registerDraggedTypes(const QStringList &types)
-{
-    (*globalDraggedTypesList()) += types;
-}
-
-const QStringList& qt_mac_enabledDraggedTypes()
-{
-    return (*globalDraggedTypesList());
-}
-
 /*****************************************************************************
   QDnD debug facilities
  *****************************************************************************/
@@ -127,9 +87,10 @@ const QStringList& qt_mac_enabledDraggedTypes()
   Constructs a new conversion object of type \a t, adding it to the
   globally accessed list of available converters.
 */
-QMacInternalPasteboardMime::QMacInternalPasteboardMime(char t) : type(t)
+QMacInternalPasteboardMime::QMacInternalPasteboardMime(QMacPasteboardMimeType t)
+    : m_type(t)
 {
-    qt_mac_addToGlobalMimeList(this);
+    QMacMimeRegistry::registerMimeConverter(this);
 }
 
 /*
@@ -138,7 +99,7 @@ QMacInternalPasteboardMime::QMacInternalPasteboardMime(char t) : type(t)
 */
 QMacInternalPasteboardMime::~QMacInternalPasteboardMime()
 {
-    qt_mac_removeFromGlobalMimeList(this);
+    QMacMimeRegistry::unregisterMimeConverter(this);
 }
 
 /*
@@ -151,13 +112,9 @@ int QMacInternalPasteboardMime::count(QMimeData *mimeData)
 }
 
 class QMacPasteboardMimeAny : public QMacInternalPasteboardMime {
-private:
-
 public:
-    QMacPasteboardMimeAny() : QMacInternalPasteboardMime(MIME_QT_CONVERTOR|MIME_ALL) {
-    }
-    ~QMacPasteboardMimeAny() {
-    }
+    QMacPasteboardMimeAny() : QMacInternalPasteboardMime(MIME_ALL_COMPATIBLE) {}
+
     QString convertorName();
 
     QString flavorFor(const QString &mime);
@@ -220,10 +177,8 @@ class QMacPasteboardMimeTypeName : public QMacInternalPasteboardMime {
 private:
 
 public:
-    QMacPasteboardMimeTypeName() : QMacInternalPasteboardMime(MIME_QT_CONVERTOR|MIME_ALL) {
-    }
-    ~QMacPasteboardMimeTypeName() {
-    }
+    QMacPasteboardMimeTypeName(): QMacInternalPasteboardMime(MIME_ALL_COMPATIBLE) {}
+
     QString convertorName();
 
     QString flavorFor(const QString &mime);
@@ -270,7 +225,7 @@ QList<QByteArray> QMacPasteboardMimeTypeName::convertFromMime(const QString &, Q
 
 class QMacPasteboardMimePlainTextFallback : public QMacInternalPasteboardMime {
 public:
-    QMacPasteboardMimePlainTextFallback() : QMacInternalPasteboardMime(MIME_ALL) { }
+    QMacPasteboardMimePlainTextFallback() : QMacInternalPasteboardMime(MIME_ALL) {}
     QString convertorName();
 
     QString flavorFor(const QString &mime);
@@ -333,7 +288,7 @@ QList<QByteArray> QMacPasteboardMimePlainTextFallback::convertFromMime(const QSt
 
 class QMacPasteboardMimeUnicodeText : public QMacInternalPasteboardMime {
 public:
-    QMacPasteboardMimeUnicodeText() : QMacInternalPasteboardMime(MIME_ALL) { }
+    QMacPasteboardMimeUnicodeText() : QMacInternalPasteboardMime(MIME_ALL) {}
     QString convertorName();
 
     QString flavorFor(const QString &mime);
@@ -425,7 +380,7 @@ QList<QByteArray> QMacPasteboardMimeUnicodeText::convertFromMime(const QString &
 
 class QMacPasteboardMimeHTMLText : public QMacInternalPasteboardMime {
 public:
-    QMacPasteboardMimeHTMLText() : QMacInternalPasteboardMime(MIME_ALL) { }
+    QMacPasteboardMimeHTMLText() : QMacInternalPasteboardMime(MIME_ALL) {}
     QString convertorName();
 
     QString flavorFor(const QString &mime);
@@ -479,7 +434,7 @@ QList<QByteArray> QMacPasteboardMimeHTMLText::convertFromMime(const QString &mim
 
 class QMacPasteboardMimeRtfText : public QMacInternalPasteboardMime {
 public:
-    QMacPasteboardMimeRtfText() : QMacInternalPasteboardMime(MIME_ALL) { }
+    QMacPasteboardMimeRtfText() : QMacInternalPasteboardMime(MIME_ALL) {}
     QString convertorName();
 
     QString flavorFor(const QString &mime);
@@ -554,7 +509,7 @@ QList<QByteArray> QMacPasteboardMimeRtfText::convertFromMime(const QString &mime
 
 class QMacPasteboardMimeFileUri : public QMacInternalPasteboardMime {
 public:
-    QMacPasteboardMimeFileUri() : QMacInternalPasteboardMime(MIME_ALL) { }
+    QMacPasteboardMimeFileUri() : QMacInternalPasteboardMime(MIME_ALL) {}
     QString convertorName();
 
     QString flavorFor(const QString &mime);
@@ -644,7 +599,7 @@ int QMacPasteboardMimeFileUri::count(QMimeData *mimeData)
 
 class QMacPasteboardMimeUrl : public QMacInternalPasteboardMime {
 public:
-    QMacPasteboardMimeUrl() : QMacInternalPasteboardMime(MIME_ALL) { }
+    QMacPasteboardMimeUrl() : QMacInternalPasteboardMime(MIME_ALL) {}
     QString convertorName();
 
     QString flavorFor(const QString &mime);
@@ -719,7 +674,7 @@ QList<QByteArray> QMacPasteboardMimeUrl::convertFromMime(const QString &mime, QV
 class QMacPasteboardMimeVCard : public QMacInternalPasteboardMime
 {
 public:
-    QMacPasteboardMimeVCard() : QMacInternalPasteboardMime(MIME_ALL){ }
+    QMacPasteboardMimeVCard() : QMacInternalPasteboardMime(MIME_ALL) {}
     QString convertorName();
 
     QString flavorFor(const QString &mime);
@@ -776,7 +731,7 @@ extern CGImageRef qt_mac_toCGImage(const QImage &qImage);
 
 class QMacPasteboardMimeTiff : public QMacInternalPasteboardMime {
 public:
-    QMacPasteboardMimeTiff() : QMacInternalPasteboardMime(MIME_ALL) { }
+    QMacPasteboardMimeTiff() : QMacInternalPasteboardMime(MIME_ALL) {}
     QString convertorName();
 
     QString flavorFor(const QString &mime);
@@ -850,107 +805,28 @@ QList<QByteArray> QMacPasteboardMimeTiff::convertFromMime(const QString &mime, Q
     return QList<QByteArray>() << QByteArray::fromCFData(data);
 }
 
-/*!
-  \internal
-
-  This is an internal function.
-*/
-void QMacInternalPasteboardMime::initializeMimeTypes()
-{
-    if (globalMimeList()->isEmpty()) {
-        // Create QMacPasteboardMimeAny first to put it at the end of globalMimeList
-        // with lowest priority. (the constructor prepends to the list)
-        new QMacPasteboardMimeAny;
-
-        //standard types that we wrap
-        new QMacPasteboardMimeTiff;
-        new QMacPasteboardMimePlainTextFallback;
-        new QMacPasteboardMimeUnicodeText;
-        new QMacPasteboardMimeRtfText;
-        new QMacPasteboardMimeHTMLText;
-        new QMacPasteboardMimeFileUri;
-        new QMacPasteboardMimeUrl;
-        new QMacPasteboardMimeTypeName;
-        new QMacPasteboardMimeVCard;
-    }
-}
-
-/*!
-  \internal
-*/
-void QMacInternalPasteboardMime::destroyMimeTypes()
-{
-    MimeList *mimes = globalMimeList();
-    while (!mimes->isEmpty())
-        delete mimes->takeFirst();
-}
+namespace QMacMimeRegistry {
 
-/*
-  Returns the most-recently created QMacPasteboardMime of type \a t that can convert
-  between the \a mime and \a flav formats.  Returns 0 if no such convertor
-  exists.
-*/
-QMacInternalPasteboardMime*
-QMacInternalPasteboardMime::convertor(uchar t, const QString &mime, QString flav)
-{
-    MimeList *mimes = globalMimeList();
-    for (MimeList::const_iterator it = mimes->constBegin(); it != mimes->constEnd(); ++it) {
-#ifdef DEBUG_MIME_MAPS
-        qDebug("QMacPasteboardMime::convertor: seeing if %s (%d) can convert %s to %d[%c%c%c%c] [%d]",
-               (*it)->convertorName().toLatin1().constData(),
-               (*it)->type & t, mime.toLatin1().constData(),
-               flav, (flav >> 24) & 0xFF, (flav >> 16) & 0xFF, (flav >> 8) & 0xFF, (flav) & 0xFF,
-               (*it)->canConvert(mime,flav));
-        for (int i = 0; i < (*it)->countFlavors(); ++i) {
-            int f = (*it)->flavor(i);
-            qDebug("  %d) %d[%c%c%c%c] [%s]", i, f,
-                   (f >> 24) & 0xFF, (f >> 16) & 0xFF, (f >> 8) & 0xFF, (f) & 0xFF,
-                   (*it)->convertorName().toLatin1().constData());
-        }
-#endif
-        if (((*it)->type & t) && (*it)->canConvert(mime, flav))
-            return (*it);
-    }
-    return 0;
-}
-/*
-  Returns a MIME type of type \a t for \a flav, or 0 if none exists.
-*/
-QString QMacInternalPasteboardMime::flavorToMime(uchar t, QString flav)
+void registerBuiltInTypes()
 {
-    MimeList *mimes = globalMimeList();
-    for (MimeList::const_iterator it = mimes->constBegin(); it != mimes->constEnd(); ++it) {
-#ifdef DEBUG_MIME_MAPS
-        qDebug("QMacMIme::flavorToMime: attempting %s (%d) for flavor %d[%c%c%c%c] [%s]",
-               (*it)->convertorName().toLatin1().constData(),
-               (*it)->type & t, flav, (flav >> 24) & 0xFF, (flav >> 16) & 0xFF, (flav >> 8) & 0xFF, (flav) & 0xFF,
-               (*it)->mimeFor(flav).toLatin1().constData());
+    // Create QMacPasteboardMimeAny first to put it at the end of globalMimeList
+    // with lowest priority. (the constructor prepends to the list)
+    new QMacPasteboardMimeAny;
 
-#endif
-        if ((*it)->type & t) {
-            QString mimeType = (*it)->mimeFor(flav);
-            if (!mimeType.isNull())
-                return mimeType;
-        }
-    }
-    return QString();
+    //standard types that we wrap
+    new QMacPasteboardMimeTiff;
+    new QMacPasteboardMimePlainTextFallback;
+    new QMacPasteboardMimeUnicodeText;
+    new QMacPasteboardMimeRtfText;
+    new QMacPasteboardMimeHTMLText;
+    new QMacPasteboardMimeFileUri;
+    new QMacPasteboardMimeUrl;
+    new QMacPasteboardMimeTypeName;
+    new QMacPasteboardMimeVCard;
 }
 
-/*
-  Returns a list of all currently defined QMacPasteboardMime objects of type \a t.
-*/
-QList<QMacInternalPasteboardMime*> QMacInternalPasteboardMime::all(uchar t)
-{
-    MimeList ret;
-    MimeList *mimes = globalMimeList();
-    for (MimeList::const_iterator it = mimes->constBegin(); it != mimes->constEnd(); ++it) {
-        if ((*it)->type & t)
-            ret.append((*it));
-    }
-    return ret;
 }
 
-
 /*
   \fn QString QMacPasteboardMime::convertorName()
 
diff --git a/src/gui/platform/darwin/qmacmime_p.h b/src/gui/platform/darwin/qmacmime_p.h
index bd926f59fe..0f90ec379f 100644
--- a/src/gui/platform/darwin/qmacmime_p.h
+++ b/src/gui/platform/darwin/qmacmime_p.h
@@ -22,25 +22,23 @@
 
 QT_BEGIN_NAMESPACE
 
-// Duplicate of QMacPasteboardMime in QtMacExtras. Keep in sync!
-class Q_GUI_EXPORT QMacInternalPasteboardMime {
-    char type;
+class Q_GUI_EXPORT QMacInternalPasteboardMime
+{
 public:
-    enum QMacPasteboardMimeType { MIME_DND=0x01,
-        MIME_CLIP=0x02,
-        MIME_QT_CONVERTOR=0x04,
-        MIME_QT3_CONVERTOR=0x08,
-        MIME_ALL=MIME_DND|MIME_CLIP
+    enum QMacPasteboardMimeType
+    {
+        MIME_DND            = 0x01,
+        MIME_CLIP           = 0x02,
+        MIME_QT_CONVERTOR   = 0x04,
+        MIME_QT3_CONVERTOR  = 0x08,
+        MIME_ALL            = MIME_DND|MIME_CLIP,
+        MIME_ALL_COMPATIBLE = MIME_ALL|MIME_QT_CONVERTOR
     };
-    explicit QMacInternalPasteboardMime(char);
-    virtual ~QMacInternalPasteboardMime();
 
-    static void initializeMimeTypes();
-    static void destroyMimeTypes();
+    explicit QMacInternalPasteboardMime(QMacPasteboardMimeType);
+    virtual ~QMacInternalPasteboardMime();
 
-    static QList<QMacInternalPasteboardMime*> all(uchar);
-    static QMacInternalPasteboardMime *convertor(uchar, const QString &mime, QString flav);
-    static QString flavorToMime(uchar, QString flav);
+    char type() const { return m_type; }
 
     virtual QString convertorName() = 0;
 
@@ -50,12 +48,10 @@ public:
     virtual QVariant convertToMime(const QString &mime, QList<QByteArray> data, QString flav) = 0;
     virtual QList<QByteArray> convertFromMime(const QString &mime, QVariant data, QString flav) = 0;
     virtual int count(QMimeData *mimeData);
-};
 
-Q_GUI_EXPORT void qt_mac_addToGlobalMimeList(QMacInternalPasteboardMime *macMime);
-Q_GUI_EXPORT void qt_mac_removeFromGlobalMimeList(QMacInternalPasteboardMime *macMime);
-Q_GUI_EXPORT void qt_mac_registerDraggedTypes(const QStringList &types);
-Q_GUI_EXPORT const QStringList& qt_mac_enabledDraggedTypes();
+private:
+    const QMacPasteboardMimeType m_type;
+};
 
 QT_END_NAMESPACE
 
diff --git a/src/gui/platform/darwin/qmacmimeregistry.mm b/src/gui/platform/darwin/qmacmimeregistry.mm
new file mode 100644
index 0000000000..20628535cc
--- /dev/null
+++ b/src/gui/platform/darwin/qmacmimeregistry.mm
@@ -0,0 +1,151 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#include <QtCore/qmimedata.h>
+
+#include "qmacmime_p.h"
+#include "qmacmimeregistry_p.h"
+#include "qguiapplication.h"
+#include "private/qcore_mac_p.h"
+
+QT_BEGIN_NAMESPACE
+
+using namespace Qt::StringLiterals;
+
+namespace QMacMimeRegistry {
+
+typedef QList<QMacInternalPasteboardMime*> MimeList;
+Q_GLOBAL_STATIC(MimeList, globalMimeList)
+Q_GLOBAL_STATIC(QStringList, globalDraggedTypesList)
+
+// implemented in qmacmime.mm
+void registerBuiltInTypes();
+
+/*!
+    \fn void qRegisterDraggedTypes(const QStringList &types)
+    \relates QMacPasteboardMime
+
+    Registers the given \a types as custom pasteboard types.
+
+    This function should be called to enable the Drag and Drop events
+    for custom pasteboard types on Cocoa implementations. This is required
+    in addition to a QMacPasteboardMime subclass implementation. By default
+    drag and drop is enabled for all standard pasteboard types.
+
+   \sa QMacPasteboardMime
+*/
+
+void registerDraggedTypes(const QStringList &types)
+{
+    (*globalDraggedTypesList()) += types;
+}
+
+const QStringList& enabledDraggedTypes()
+{
+    return (*globalDraggedTypesList());
+}
+
+/*****************************************************************************
+  QDnD debug facilities
+ *****************************************************************************/
+//#define DEBUG_MIME_MAPS
+
+/*!
+  \class QMacMimeRegistry
+  \internal
+  \ingroup draganddrop
+*/
+
+/*!
+  \internal
+
+  This is an internal function.
+*/
+void initializeMimeTypes()
+{
+    if (globalMimeList()->isEmpty())
+        registerBuiltInTypes();
+}
+
+/*!
+  \internal
+*/
+void destroyMimeTypes()
+{
+    MimeList *mimes = globalMimeList();
+    while (!mimes->isEmpty())
+        delete mimes->takeFirst();
+}
+
+/*
+  Returns the most-recently created QMacPasteboardMime of type \a t that can convert
+  between the \a mime and \a flav formats.  Returns 0 if no such convertor
+  exists.
+*/
+QMacInternalPasteboardMime *convertor(uchar t, const QString &mime, QString flav)
+{
+    MimeList *mimes = globalMimeList();
+    for (MimeList::const_iterator it = mimes->constBegin(); it != mimes->constEnd(); ++it) {
+#ifdef DEBUG_MIME_MAPS
+        qDebug("QMacMimeRegistry::convertor: seeing if %s (%d) can convert %s to %s [%d]",
+               qPrintable((*it)->convertorName()), (*it)->type() & t, qPrintable(mime),
+               qPrintable(flav), (*it)->canConvert(mime,flav));
+#endif
+        if (((*it)->type() & t) && (*it)->canConvert(mime, flav))
+            return (*it);
+    }
+    return 0;
+}
+/*
+  Returns a MIME type of type \a t for \a flav, or 0 if none exists.
+*/
+QString flavorToMime(uchar t, QString flav)
+{
+    MimeList *mimes = globalMimeList();
+    for (MimeList::const_iterator it = mimes->constBegin(); it != mimes->constEnd(); ++it) {
+#ifdef DEBUG_MIME_MAPS
+        qDebug("QMacMimeRegistry::flavorToMime: attempting %s (%d) for flavor %s [%s]",
+               qPrintable((*it)->convertorName()), (*it)->type() & t, qPrintable(flav),
+               qPrintable((*it)->mimeFor(flav)));
+#endif
+        if ((*it)->type() & t) {
+            QString mimeType = (*it)->mimeFor(flav);
+            if (!mimeType.isNull())
+                return mimeType;
+        }
+    }
+    return QString();
+}
+
+void registerMimeConverter(QMacInternalPasteboardMime *macMime)
+{
+    // globalMimeList is in decreasing priority order. Recently added
+    // converters take prioity over previously added converters: prepend
+    // to the list.
+    globalMimeList()->prepend(macMime);
+}
+
+void unregisterMimeConverter(QMacInternalPasteboardMime *macMime)
+{
+    if (!QGuiApplication::closingDown())
+        globalMimeList()->removeAll(macMime);
+}
+
+
+/*
+  Returns a list of all currently defined QMacPasteboardMime objects of type \a t.
+*/
+QList<QMacInternalPasteboardMime *> all(uchar t)
+{
+    MimeList ret;
+    MimeList *mimes = globalMimeList();
+    for (MimeList::const_iterator it = mimes->constBegin(); it != mimes->constEnd(); ++it) {
+        if ((*it)->type() & t)
+            ret.append((*it));
+    }
+    return ret;
+}
+
+} // namespace QMacMimeRegistry
+
+QT_END_NAMESPACE
diff --git a/src/gui/platform/darwin/qmacmimeregistry_p.h b/src/gui/platform/darwin/qmacmimeregistry_p.h
new file mode 100644
index 0000000000..8e2a3f7d7a
--- /dev/null
+++ b/src/gui/platform/darwin/qmacmimeregistry_p.h
@@ -0,0 +1,44 @@
+// Copyright (C) 2022 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#ifndef QMACMIMEREGISTRY_H
+#define QMACMIMEREGISTRY_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+
+#include <QtGui/private/qtguiglobal_p.h>
+
+#include <CoreFoundation/CoreFoundation.h>
+
+QT_BEGIN_NAMESPACE
+
+class QMacInternalPasteboardMime;
+
+namespace QMacMimeRegistry {
+    Q_GUI_EXPORT void initializeMimeTypes();
+    Q_GUI_EXPORT void destroyMimeTypes();
+
+    Q_GUI_EXPORT void registerMimeConverter(QMacInternalPasteboardMime *);
+    Q_GUI_EXPORT void unregisterMimeConverter(QMacInternalPasteboardMime *);
+
+    Q_GUI_EXPORT QList<QMacInternalPasteboardMime *> all(uchar);
+    Q_GUI_EXPORT QMacInternalPasteboardMime *convertor(uchar, const QString &mime, QString flav);
+    Q_GUI_EXPORT QString flavorToMime(uchar, QString flav);
+
+    Q_GUI_EXPORT void registerDraggedTypes(const QStringList &types);
+    Q_GUI_EXPORT const QStringList& enabledDraggedTypes();
+};
+
+QT_END_NAMESPACE
+
+#endif // QMACMIMEREGISTRY_H
diff --git a/src/plugins/platforms/cocoa/qcocoaclipboard.mm b/src/plugins/platforms/cocoa/qcocoaclipboard.mm
index 7363b011bf..8c48f282c9 100644
--- a/src/plugins/platforms/cocoa/qcocoaclipboard.mm
+++ b/src/plugins/platforms/cocoa/qcocoaclipboard.mm
@@ -3,6 +3,8 @@
 
 #include "qcocoaclipboard.h"
 
+#include <QtGui/private/qmacmime_p.h>
+
 #ifndef QT_NO_CLIPBOARD
 
 QT_BEGIN_NAMESPACE
diff --git a/src/plugins/platforms/cocoa/qcocoadrag.mm b/src/plugins/platforms/cocoa/qcocoadrag.mm
index 7a73344480..dc1f68bd23 100644
--- a/src/plugins/platforms/cocoa/qcocoadrag.mm
+++ b/src/plugins/platforms/cocoa/qcocoadrag.mm
@@ -7,6 +7,7 @@
 #include "qmacclipboard.h"
 #include "qcocoahelpers.h"
 #include <QtGui/private/qcoregraphics_p.h>
+#include <QtGui/private/qmacmime_p.h>
 #include <QtCore/qsysinfo.h>
 #include <QtCore/private/qcore_mac_p.h>
 
diff --git a/src/plugins/platforms/cocoa/qcocoaintegration.mm b/src/plugins/platforms/cocoa/qcocoaintegration.mm
index 2d2a7890d0..b17ab38b10 100644
--- a/src/plugins/platforms/cocoa/qcocoaintegration.mm
+++ b/src/plugins/platforms/cocoa/qcocoaintegration.mm
@@ -32,6 +32,7 @@
 
 #include <QtCore/private/qcore_mac_p.h>
 #include <QtGui/private/qcoregraphics_p.h>
+#include <QtGui/private/qmacmimeregistry_p.h>
 #include <QtGui/private/qopenglcontext_p.h>
 #include <QtGui/private/qrhibackingstore_p.h>
 #include <QtGui/private/qfontengine_coretext_p.h>
@@ -164,7 +165,7 @@ QCocoaIntegration::QCocoaIntegration(const QStringList &paramList)
 
     QCocoaScreen::initializeScreens();
 
-    QMacInternalPasteboardMime::initializeMimeTypes();
+    QMacMimeRegistry::initializeMimeTypes();
     QCocoaMimeTypes::initializeMimeTypes();
     QWindowSystemInterfacePrivate::TabletEvent::setPlatformSynthesizesMouse(false);
     QWindowSystemInterface::registerInputDevice(new QInputDevice(QString("keyboard"), 0,
@@ -194,7 +195,7 @@ QCocoaIntegration::~QCocoaIntegration()
     // Deleting the clipboard integration flushes promised pastes using
     // the mime converters - the ordering here is important.
     delete mCocoaClipboard;
-    QMacInternalPasteboardMime::destroyMimeTypes();
+    QMacMimeRegistry::destroyMimeTypes();
 #endif
 
     QCocoaScreen::cleanupScreens();
diff --git a/src/plugins/platforms/cocoa/qcocoanativeinterface.mm b/src/plugins/platforms/cocoa/qcocoanativeinterface.mm
index 38a6060256..fd7e1c07b7 100644
--- a/src/plugins/platforms/cocoa/qcocoanativeinterface.mm
+++ b/src/plugins/platforms/cocoa/qcocoanativeinterface.mm
@@ -26,6 +26,7 @@
 #include <QtGui/qguiapplication.h>
 #include <qdebug.h>
 
+#include <QtGui/private/qmacmimeregistry_p.h>
 #include <QtGui/private/qcoregraphics_p.h>
 
 #if QT_CONFIG(vulkan)
@@ -120,7 +121,7 @@ void QCocoaNativeInterface::onAppFocusWindowChanged(QWindow *window)
 
 void QCocoaNativeInterface::registerDraggedTypes(const QStringList &types)
 {
-    qt_mac_registerDraggedTypes(types);
+    QMacMimeRegistry::registerDraggedTypes(types);
 }
 
 void QCocoaNativeInterface::setEmbeddedInForeignView(QPlatformWindow *window, bool embedded)
diff --git a/src/plugins/platforms/cocoa/qmacclipboard.h b/src/plugins/platforms/cocoa/qmacclipboard.h
index 925e816831..3cd33f9591 100644
--- a/src/plugins/platforms/cocoa/qmacclipboard.h
+++ b/src/plugins/platforms/cocoa/qmacclipboard.h
@@ -5,13 +5,14 @@
 #define QMACCLIPBOARD_H
 
 #include <QtGui>
-#include <QtGui/private/qmacmime_p.h>
 
 #include <ApplicationServices/ApplicationServices.h>
 
 QT_BEGIN_NAMESPACE
 
 class QMacMimeData;
+class QMacInternalPasteboardMime;
+
 class QMacPasteboard
 {
 public:
diff --git a/src/plugins/platforms/cocoa/qmacclipboard.mm b/src/plugins/platforms/cocoa/qmacclipboard.mm
index b298a47bef..5287638d80 100644
--- a/src/plugins/platforms/cocoa/qmacclipboard.mm
+++ b/src/plugins/platforms/cocoa/qmacclipboard.mm
@@ -4,6 +4,8 @@
 #include <AppKit/AppKit.h>
 
 #include "qmacclipboard.h"
+#include <QtGui/private/qmacmimeregistry_p.h>
+#include <QtGui/private/qmacmime_p.h>
 #include <QtGui/qclipboard.h>
 #include <QtGui/qguiapplication.h>
 #include <QtGui/qbitmap.h>
@@ -130,7 +132,7 @@ OSStatus QMacPasteboard::promiseKeeper(PasteboardRef paste, PasteboardItemID id,
 
     // Find the kept promise
     QList<QMacInternalPasteboardMime*> availableConverters
-        = QMacInternalPasteboardMime::all(QMacInternalPasteboardMime::MIME_ALL);
+        = QMacMimeRegistry::all(QMacInternalPasteboardMime::MIME_ALL);
     const QString flavorAsQString = QString::fromCFString(flavor);
     QMacPasteboard::Promise promise;
     for (int i = 0; i < qpaste->promises.size(); i++){
@@ -297,7 +299,7 @@ QMacPasteboard::setMimeData(QMimeData *mime_src, DataRequestType dataRequestType
     delete mime;
     mime = mime_src;
 
-    QList<QMacInternalPasteboardMime*> availableConverters = QMacInternalPasteboardMime::all(mime_type);
+    QList<QMacInternalPasteboardMime*> availableConverters = QMacMimeRegistry::all(mime_type);
     if (mime != nullptr) {
         clear_helper();
         QStringList formats = mime_src->formats();
@@ -372,7 +374,7 @@ QMacPasteboard::formats() const
         for (int i = 0; i < type_count; ++i) {
             const QString flavor = QString::fromCFString((CFStringRef)CFArrayGetValueAtIndex(types, i));
             qCDebug(lcQpaClipboard, " -%s", qPrintable(QString(flavor)));
-            QString mimeType = QMacInternalPasteboardMime::flavorToMime(mime_type, flavor);
+            QString mimeType = QMacMimeRegistry::flavorToMime(mime_type, flavor);
             if (!mimeType.isEmpty() && !ret.contains(mimeType)) {
                 qCDebug(lcQpaClipboard, "   -<%lld> %s [%s]", ret.size(), qPrintable(mimeType), qPrintable(QString(flavor)));
                 ret << mimeType;
@@ -409,7 +411,7 @@ QMacPasteboard::hasFormat(const QString &format) const
         for (int i = 0; i < type_count; ++i) {
             const QString flavor = QString::fromCFString((CFStringRef)CFArrayGetValueAtIndex(types, i));
             qCDebug(lcQpaClipboard, " -%s [0x%x]", qPrintable(QString(flavor)), mime_type);
-            QString mimeType = QMacInternalPasteboardMime::flavorToMime(mime_type, flavor);
+            QString mimeType = QMacMimeRegistry::flavorToMime(mime_type, flavor);
             if (!mimeType.isEmpty())
                 qCDebug(lcQpaClipboard, "   - %s", qPrintable(mimeType));
             if (mimeType == format)
@@ -432,7 +434,7 @@ QMacPasteboard::retrieveData(const QString &format, QMetaType) const
         return QByteArray();
 
     qCDebug(lcQpaClipboard, "Pasteboard: retrieveData [%s]", qPrintable(format));
-    const QList<QMacInternalPasteboardMime *> mimes = QMacInternalPasteboardMime::all(mime_type);
+    const QList<QMacInternalPasteboardMime *> mimes = QMacMimeRegistry::all(mime_type);
     for (int mime = 0; mime < mimes.size(); ++mime) {
         QMacInternalPasteboardMime *c = mimes.at(mime);
         QString c_flavor = c->flavorFor(format);
diff --git a/src/plugins/platforms/cocoa/qnsview.mm b/src/plugins/platforms/cocoa/qnsview.mm
index b73d186612..eb4405ccd0 100644
--- a/src/plugins/platforms/cocoa/qnsview.mm
+++ b/src/plugins/platforms/cocoa/qnsview.mm
@@ -34,6 +34,7 @@
 #include "qcocoaglcontext.h"
 #endif
 #include "qcocoaintegration.h"
+#include <QtGui/private/qmacmimeregistry_p.h>
 
 // Private interface
 @interface QNSView ()
diff --git a/src/plugins/platforms/cocoa/qnsview_dragging.mm b/src/plugins/platforms/cocoa/qnsview_dragging.mm
index c88e5d502f..06b917945a 100644
--- a/src/plugins/platforms/cocoa/qnsview_dragging.mm
+++ b/src/plugins/platforms/cocoa/qnsview_dragging.mm
@@ -21,7 +21,7 @@
                    NSPasteboardTypeMultipleTextSelection, mimeTypeGeneric]];
 
     // Add custom types supported by the application
-    for (const QString &customType : qt_mac_enabledDraggedTypes())
+    for (const QString &customType : QMacMimeRegistry::enabledDraggedTypes())
         [supportedTypes addObject:customType.toNSString()];
 
     [self registerForDraggedTypes:supportedTypes];
diff --git a/src/plugins/platforms/ios/qiosclipboard.mm b/src/plugins/platforms/ios/qiosclipboard.mm
index 554c3ca118..62a9061086 100644
--- a/src/plugins/platforms/ios/qiosclipboard.mm
+++ b/src/plugins/platforms/ios/qiosclipboard.mm
@@ -6,6 +6,7 @@
 #ifndef QT_NO_CLIPBOARD
 
 #include <QtCore/qurl.h>
+#include <QtGui/private/qmacmimeregistry_p.h>
 #include <QtGui/private/qmacmime_p.h>
 #include <QtCore/QMimeData>
 #include <QtGui/QGuiApplication>
@@ -116,7 +117,7 @@ QStringList QIOSMimeData::formats() const
 
     for (NSUInteger i = 0; i < [pasteboardTypes count]; ++i) {
         QString uti = QString::fromNSString([pasteboardTypes objectAtIndex:i]);
-        QString mimeType = QMacInternalPasteboardMime::flavorToMime(QMacInternalPasteboardMime::MIME_ALL, uti);
+        QString mimeType = QMacMimeRegistry::flavorToMime(QMacInternalPasteboardMime::MIME_ALL, uti);
         if (!mimeType.isEmpty() && !foundMimeTypes.contains(mimeType))
             foundMimeTypes << mimeType;
     }
@@ -130,7 +131,7 @@ QVariant QIOSMimeData::retrieveData(const QString &mimeType, QMetaType) const
     NSArray<NSString *> *pasteboardTypes = [pb pasteboardTypes];
 
     foreach (QMacInternalPasteboardMime *converter,
-             QMacInternalPasteboardMime::all(QMacInternalPasteboardMime::MIME_ALL)) {
+             QMacMimeRegistry::all(QMacInternalPasteboardMime::MIME_ALL)) {
         if (!converter->canConvert(mimeType, converter->flavorFor(mimeType)))
             continue;
 
@@ -185,7 +186,7 @@ void QIOSClipboard::setMimeData(QMimeData *mimeData, QClipboard::Mode mode)
 
     foreach (const QString &mimeType, mimeData->formats()) {
         foreach (QMacInternalPasteboardMime *converter,
-                 QMacInternalPasteboardMime::all(QMacInternalPasteboardMime::MIME_ALL)) {
+                 QMacMimeRegistry::all(QMacInternalPasteboardMime::MIME_ALL)) {
             QString uti = converter->flavorFor(mimeType);
             if (uti.isEmpty() || !converter->canConvert(mimeType, uti))
                 continue;
diff --git a/src/plugins/platforms/ios/qiosintegration.mm b/src/plugins/platforms/ios/qiosintegration.mm
index 84caccc267..244b182f65 100644
--- a/src/plugins/platforms/ios/qiosintegration.mm
+++ b/src/plugins/platforms/ios/qiosintegration.mm
@@ -24,6 +24,7 @@
 #include <qpa/qplatformoffscreensurface.h>
 
 #include <QtGui/private/qcoretextfontdatabase_p.h>
+#include <QtGui/private/qmacmimeregistry_p.h>
 #include <QtGui/private/qmacmime_p.h>
 #include <QDir>
 #include <QOperatingSystemVersion>
@@ -89,7 +90,7 @@ void QIOSIntegration::initialize()
 #if QT_CONFIG(tabletevent)
     QWindowSystemInterfacePrivate::TabletEvent::setPlatformSynthesizesMouse(false);
 #endif
-    QMacInternalPasteboardMime::initializeMimeTypes();
+    QMacMimeRegistry::initializeMimeTypes();
 
     qsizetype size = QList<QPluginParsedMetaData>(m_optionalPlugins->metaData()).size();
     for (qsizetype i = 0; i < size; ++i)
@@ -105,7 +106,7 @@ QIOSIntegration::~QIOSIntegration()
     delete m_clipboard;
     m_clipboard = 0;
 #endif
-    QMacInternalPasteboardMime::destroyMimeTypes();
+    QMacMimeRegistry::destroyMimeTypes();
 
     delete m_inputContext;
     m_inputContext = 0;