Hello.
Timo Savola wrote some patches for Emacs in order to bring the
capability to embed the Emacs GTK frame into another one, using GTK
sockets [1]. RMS asked him to wait for the 22 release, so he did, and
then he started a new thread on this list last summer [2].
Timo used these patches to wrap Emacs with some tools like a file
browser I believe. The PIDA project [3] - whose motto is to reuse all
the fine components for an IDE around - needs these patches too to embed
the Emacs frame.
Since the last thread about these patches seems to have ended in last
july, I would like to know if they could make their way in trunk soon,
or where they are blocked today.