Carlos Garnacho authored Oct 29, 2014 and Jasper St. Pierre committed Jan 18, 2015

This object internally keeps track of the relevant input configuration,
and goes through its vmethods in order to apply the configuration on the
backend-specific devices.

So far, only mouse/touchpad settings are actually attached to GSettings
changes. ::set_matrix(), meant for tablets/touchscreens, is not hooked
yet.

One caveat is that meta_input_settings_create() may return NULL if the
backend does not own the windowing system (wayland nested on X11 being
the one case), and thus device settings can't be changed freely.

https://bugzilla.gnome.org/show_bug.cgi?id=739397