This uses CVDisplayLink to drive the GdkFrameClock. A GdkWindow
can register a frame callback to thaw their frame clock as necessary
based on the next notification from CVDisplayLink.
CVDisplayLink notifies us on a high-priority thread. We use the same
NSEventas gdkeventloop-quartz.c to wakeup the main loop. This is done
so that we don’t pathologically wake up the select thread to then
continue notifying the main loop.
We use an embedded GList node in the GdkWindowImplQuartz so that we
can avoid allocating any lists or arrays for pending frame callbacks.
Compare this to the same design in GdkWindow for children.
gdkinternal-quartz.h isn't installed but the headers that included
it are, which which would cause the build to fail if an external
project included one of them.
Also changed the includes in gdkinteral-quartz.h to local for
faster loading.
Some applications need to access gdk_quartz_window_get_nsview,
gdk_quartz_window_get_nswindow, and gdk_quartz_event_get_nsevent
so move these from the private gdkquartz-gtk-only.h to a new
header gdkquartz-cocoa-access.h. Don't include this header in
gdkquartz.h so that user code that doesn't need to access these
functins isn't required to compile with Objective C/C++.
Closes https://gitlab.gnome.org/GNOME/gtk/-/issues/1737
The preprocessor directives for proper OS version support are missing
their last digit, rendering the checks defunct.
Improves on https://gitlab.gnome.org/GNOME/gtk/-/issues/3592 but does
not fully fix as other issues have surfaced down the line.
Closes: https://gitlab.gnome.org/GNOME/gtk/issues/1737
Don't export any functions taking or returning MacOS types in
gdkquartz.h, gdkprivate-quartz.h, or any header that either includes.
The GdkQuartz internal functions are moved to a new header
gdkinternal-quartz.h, the functions used by quartz-specific
Gtk files are moved to another new header gdkquartz-gtk-only.h, and
the key and event enums to a new header gdkkeys-quartz.h.
