Re: "Final" version of tty child frames

[martin rudalics]

> Btw, another complication is to do all this testing with
> display-line-numbers turned on, especially when Emacs decides to
> enlarge the number of digits in a line number, and all the display
> of the parent frame needs to scroll horizontally left or right.

I tested that and see no problems.

> Here's another one: what happens if the horizontal coordinate where a
> child frame starts to hide its parent is in the middle of a display
> string or an overlay string?  Does cursor motion then works correctly?

I mentioned that in my first post.  Basically, this might be already a
problem when setting up the combined matrices.  Any display property
within the underlying frame will have to be on any glyph shown in the
combined matrix.  Any display property of the covering frame will be
ignored.

This can be compared to a display property in a normal frame hscrolled
to the left so the beginning of the line is not visible.  How is a
display property starting before the first glyph shown on that line
handled?  Then we could do the same for a display property that starts
in the part of the frame covered by a child frame but extends to the
visible part following the child frame.

martin