Re: "Final" version of tty child frames

[Gerd Möllmann]

Eli Zaretskii <eliz@gnu.org> writes:

>> If that's a glyph from a buffer. and glyph->frame != f we're under a
>> child, else not. Like I said, I'd bet only a small amount on that,
>> perhaps you and Martin could also check?
>
> My question was a suggestion to check this, yes.

There might be another problem. Feng Shu, the author of Posframe,
reported a problem with child frames over Chinese text at some point:

  https://yhetil.org/emacs-devel/m25xpji82g.fsf@gmail.com/

In short, this handles the case that a child frame overlaps a
double-width character, in the sense that one half of the displayed
character is outside of the child frame, and the other half is under the
child frame.

Maybe separate matrices would be easier to reason about :-/.