enable xdg for next crosswalk rebase

[rzr]

No description provided.

[kalyankondapally]

@rzr The only problem I see here is with the version of xdg_shell. The minimum wayland version we support is 1.4, but xdg_shell protocol I believe is close to the one from 1.5 version. Now, anybody compiling against 1.4 will have problems ?

[rzr]

True supporting multiple xdg version could be hard to maintain , but since it's supposed to be stable and part of wayland next version (/me join his hands) let's focus on the latest version... and disable it by default unless user dare to enable it using env variable from my previous commit ...

I would add this in the release note as known limitation for wayland-1.4 users , just curious are there any distro that integrate it using 1.4 . so far tizen switched to 1.5 AFAIK.

But to answer your question, if version are mismatching AND the feature enabled with env var, then expect some warning logs in the console, no more arm than I know ... maybe it will stress wayland a bit since log of lines will be printed in loop ...

[Tarnyko]

For the record, upstream Weston (not Tizen's one) did not have xdg-shell at all.
So, this is very unlikely to cause problems unless the user uses a development version of Weston between 1.4 and 1.5, which I believe is an unsupported scenario.
If this is the regular Weston 1.4 release, Ozone will just fall back to wl_shell.

[kalyankondapally]

Merged