Re: local keymap patch for key-binding

[Richard Stallman]

    There is one concern that I have: the type of the "location" argument.
    This currently is a key sequence.  But it might make more sense to
    turn this into the "location" data structure that `event-start' and/or
    `event-end' return.  This would make it much easier to feed lookup-key
    with data produced from, say, `posn-at-x-y'.

That seems like a good idea.  (We call that a "position".)

    In order to get this data easier, it might make sense to define a
    convenience function.

    (defun key-event (key)
       "Return event from moused-base key sequence KEY."
       (and (vectorp key)
            (if (consp (aref key 0))
                (aref key 0)
              (and
                (symbolp (aref key 0))
                (> (length key) 1)
                (consp (aref key 1))
                (aref key 1)))))

I have nothing against it, but do we really need it?
Is there a place that needs to call this, outside of the code
of Fkey_binding itself?