Hi all,

today I've discovered `show-paren-context-when-offscreen' which displays
the context around the opening paren in the echo area.  That's a very
nice feature, however it competes with eldoc, i.e., it'll show the
context in the echo area and a fraction of a second later, that's
repressed by eldoc's text (or the other way round depending on the
delays one uses).

Therefore, I've experimented with adding a special `child-frame' value
for `show-paren-context-when-offscreen' which displays the context in a
child frame.  This works pretty well although setting up a child frame
with corresponding buffer for a kind of tooltip pane requires quite some
gymnastics in frame parameters and buffer-local variables which I've
copied from vertico.  Comments welcome!

Bye,
Tassilo