core: Ensure passive key grabs are only set up on X11
We don't strictly need it for wayland compositors, yet there are
paths where we try to trigger those passive grabs there. Just
skip those on the high level code (where "is it x11" decisions
are taken) like we do with passive button grabs.
core: Shuffle wayland checks on passive button grabs
We used to bail out at the very bottom of it, but it seems better to
do that at a higher level so that we don't have to pass "invalid"
X11 data as arguments (e.g. None for windows, etc)
This argument instructs Xwayland to exit when there are no further
client connections. However we eventually want to handle restarts
ourselves (where, notably, mutter's will be at least the last client
connection).
This behavior could also induce race conditions on startup with clients
that quickly open and close a display, which is a more pressing issue.
Also, add -noreset back (which was also removed in commit 054c25f693 that
added -terminate). We don't want to reset the X server to a pristine state
in that situation either.
Code underneath seems to handle errors properly, or be x11-agnostic
entirely, this is apparently here to save a few XSync()s on X11. Just
drop this windowing dependent bit to make things cleaner.
Code underneath seems to handle errors properly, and this is apparently
here to save a few XSync()s on X11. Just drop this windowing dependent
bit to make things cleaner.
It is now separated into meta_xwayland_start(), which picks an unused
display and sets up the sockets, and meta_xwayland_init_xserver(), which
does the actual exec of Xwayland and MetaX11Display initialization.
This differentiation will be useful when Mutter is able to launch Xwayland
lazily, currently the former calls into the latter.
In all places (including src/wayland) we tap into meta_x11_display* focus
API, which then calls meta_display* API. This relation is backwards, so
rework input focus management so it's the other way around.
We now have high-level meta_display_(un)set_input_focus functions, which
perform the backend-independent maintenance, and calls into the X11
functions where relevant. These functions are what callers should use.
