Windows: Expose helper functions for QWindowsMime to the native interface.

Enable QWindowsMimeConverter to use external mime handlers which it
does not own.

Task-number: QTBUG-39559
Change-Id: Ife6607dffd9571fa4aa12fffdc61b42662182b0a
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>

src/plugins/platforms/windows/qwindowsmime.cpp

@@ -1442,13 +1442,13 @@ QString QLastResortMimes::mimeForFormat(const FORMATETC &formatetc) const
     \sa QWindowsMime
 */
 
-QWindowsMimeConverter::QWindowsMimeConverter()
+QWindowsMimeConverter::QWindowsMimeConverter() : m_internalMimeCount(0)
 {
 }
 
 QWindowsMimeConverter::~QWindowsMimeConverter()
 {
-    qDeleteAll(m_mimes);
+    qDeleteAll(m_mimes.begin(), m_mimes.begin() + m_internalMimeCount);
 }
 
 QWindowsMime * QWindowsMimeConverter::converterToMime(const QString &mimeType, IDataObject *pDataObj) const
@@ -1526,6 +1526,7 @@ void QWindowsMimeConverter::ensureInitialized() const
         m_mimes << new QWindowsMimeImage << new QLastResortMimes
                 << new QWindowsMimeText << new QWindowsMimeURI
                 << new QWindowsMimeHtml << new QBuiltInMimes;
+        m_internalMimeCount = m_mimes.size();
     }
 }
 
@@ -1552,4 +1553,10 @@ QVariant QWindowsMimeConverter::convertToMime(const QStringList &mimeTypes,
     return QVariant();
 }
 
+void QWindowsMimeConverter::registerMime(QWindowsMime *mime)
+{
+    ensureInitialized();
+    m_mimes.append(mime);
+}
+
 QT_END_NAMESPACE

src/plugins/platforms/windows/qwindowsmime.h

@@ -89,12 +89,14 @@ public:
     QVariant convertToMime(const QStringList &mimeTypes, IDataObject *pDataObj, QVariant::Type preferredType,
                            QString *format = 0) const;
 
-private:
-    typedef QSharedPointer<QWindowsMime> MimePtr;
+    void registerMime(QWindowsMime *mime);
+    void unregisterMime(QWindowsMime *mime) { m_mimes.removeOne(mime); }
 
+private:
     void ensureInitialized() const;
 
     mutable QList<QWindowsMime *> m_mimes;
+    mutable int m_internalMimeCount;
 };
 
 QT_END_NAMESPACE

src/plugins/platforms/windows/qwindowsnativeinterface.cpp

@@ -44,6 +44,7 @@
 #include "qwindowscontext.h"
 #include "qwindowsopenglcontext.h"
 #include "qwindowsintegration.h"
+#include "qwindowsmime.h"
 
 #include <QtGui/QWindow>
 #include <QtGui/QOpenGLContext>
@@ -172,4 +173,19 @@ void QWindowsNativeInterface::setAsyncExpose(bool value)
     QWindowsContext::instance()->setAsyncExpose(value);
 }
 
+void QWindowsNativeInterface::registerWindowsMime(void *mimeIn)
+{
+    QWindowsContext::instance()->mimeConverter().registerMime(reinterpret_cast<QWindowsMime *>(mimeIn));
+}
+
+void QWindowsNativeInterface::unregisterWindowsMime(void *mimeIn)
+{
+    QWindowsContext::instance()->mimeConverter().unregisterMime(reinterpret_cast<QWindowsMime *>(mimeIn));
+}
+
+int QWindowsNativeInterface::registerMimeType(const QString &mimeType)
+{
+    return QWindowsMime::registerMimeType(mimeType);
+}
+
 QT_END_NAMESPACE

src/plugins/platforms/windows/qwindowsnativeinterface.h

@@ -82,6 +82,10 @@ public:
 
     Q_INVOKABLE void beep() { MessageBeep(MB_OK); } // For QApplication
 
+    Q_INVOKABLE void registerWindowsMime(void *mimeIn);
+    Q_INVOKABLE void unregisterWindowsMime(void *mime);
+    Q_INVOKABLE int registerMimeType(const QString &mimeType);
+
     bool asyncExpose() const;
     void setAsyncExpose(bool value);