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gcc has optimizations for include guards that only work
if they are outermost in the the header.
https://bugzilla.gnome.org/show_bug.cgi?id=689810

This happen if nothing has been drawn yet.

This makes it not possible to select the canvas objects, etc.

This way the broadway-*.c namespace is for the daemon and gdk* for the
gdk lib.

The "server" part is too confusing, there are to many servers around.

This is not needed anymore, its just used by the server.

This makes the ownership cleaner

This kinda works but is very rudimentary

We've accumulated enough wholly-deprecated objects again
that it makes sense to move them to their own section.

Call it gtkcolorswatchaccessibleprivate.h. This matches what we're
doing for non-public widget headers in gtk/.

It didn't really add anything to the range accessible implementation.

This is a trivial example. Just check that we can derive
from GtkButtonAccessible, and have a GtkButton subclass
use the derived accessible implementation.

We add a separate gtk-a11y.h single-include header for
them. This header will work much the same as gtkx.h. It
will be installed in /usr/include/gtk-3.0/gtk, but you
have to include it separately.

We install the headers for the a11y implementations in
/usr/include/gtk-3.0/gtk/a11y/.

More preparation for installing these headers.

Since we are going to install these headers soon, we need
to make their mutual includes work in the installed location
as well. Also, avoid including individual gtk headers, to
avoid trouble with single-include guards.

Rename GailMisc to GtkMiscImpl.

Move gail.h to gtkaccessibility.h, and libgail to libgtka11y.

Replace GAIL in top comments by 'GTK+ - accessibility implementations'.

This commit exposes the get_type() functions and standard
headers for accessible implementations. This makes it possible
to derive from the GTK accessible implementations without
GType magic tricks. This is necessary, because we require the
a11y type hierarchy to be parallel to the widget type hierarchy.
So, if you derive a widget and need to adjust its a11y implementation,
you have to be able to derive its accessible implementation.

This commit probably exposes more than is absolutely necessary,
it also exposes accessibles of widgets that are unlikely candidates
for deriving from.