[PATCH weston/wayland 0/7] drag-and-drop progress notification and actions

[Carlos Garnacho]

Hey,

I'm resending again the whole batch again. I applied all suggestions from
Jonas, in the end I liked his idea to have data source notification
triggered explicitly by a wl_data_offer request, so I added the .finish
request to wayland 1/2, and added the implementation on weston 1/5.

The rest of the patches just contain minor changes, mostly as spotted by
Jonas. Everything is detailed in the commit logs.

One caveat though, I added versioning checks all through the compositor
changes, but I haven't added any version checks to the client side, nor
made it handle version < 3 gracefully. The idea behind weston 5/5 is that
the dnd client uses these changes integrally, it felt somewhat moot to me
to make it handle two different modes of operation, especially if the
older is known to be broken for the usecases we're intending to demonstrate
here... I hope this sounds fine.

Cheers,
  Carlos