Robert Mader 33b834c433 wayland/data-offer: Accept final preferrence of drop destination
Quoting the spec for `wl_data_device::drop`:
> If the resulting action is "ask", the action will not be considered
> final. The drag-and-drop destination is expected to perform one last
> wl_data_offer.set_actions request, or wl_data_offer.destroy in order
> to cancel the operation.

We did not respect the action choosen by the drop destination when
it called `wl_data_offer::set_actions` after `wl_data_device::drop`
if a user override was still active. This eventually resulted in
a protocol error in `wl_data_offer::finish`, as the current action
could still be `ask`.

Fix this by only allowing a user override to `ask` before `drop` is
called, thus making sure the final `set_actions` preference is
honored.

Closes https://gitlab.gnome.org/GNOME/mutter/-/issues/1952

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2043>
2021-10-14 21:08:42 +00:00
..
2021-09-04 20:00:23 +00:00