Client: Advertise all supported mime types

Qt has some internal mime types that can be translated to known types.
For example the mime type application/x-qt-image Qt can convert to any
supported image format.

The data_source_send method already converts (via
QWaylandMimeHelper::getByteArray)

However we previously only advertised the list of mimetypes explicitly
set by the application.

This brings us in line with the X11 QPA.

Fixes: QTBUG-87657
Pick-to: 5.15
Change-Id: Ia09c0cbc1f0997552bd253e79d6715ebcafee0a1
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/client/qwaylanddatasource.cpp b/src/client/qwaylanddatasource.cpp
index ea76943a7..f45122fb9 100644
--- a/src/client/qwaylanddatasource.cpp
+++ b/src/client/qwaylanddatasource.cpp
@@ -60,7 +60,7 @@ QWaylandDataSource::QWaylandDataSource(QWaylandDataDeviceManager *dataDeviceMana
 {
     if (!mimeData)
         return;
-    const auto formats = mimeData->formats();
+    const auto formats = QInternalMimeData::formatsHelper(mimeData);
     for (const QString &format : formats) {
         offer(format);
     }