Re: "Final" version of tty child frames

[Eli Zaretskii]

> Date: Sat, 04 Jan 2025 14:09:55 -0800
> From: Jared Finder <jared@finder.org>
> Cc: Eli Zaretskii <eliz@gnu.org>, gerd.moellmann@gmail.com,
>  emacs-devel@gnu.org
> 
> TTY child frame cursors behave even worse under GPM and a TERM=linux 
> terminal.  In this case, the cursor ends up on some lines always 
> appearing at the end of lines (ignoring separate frames or windows) and 
> sometimes in the right place.  The point position is correct though and 
> the cursor does appear correctly once I start pressing simple keys like 
> 'A'.
> 
> Unfortunately, the redisplay code in Emacs is super hard for me to 
> understand and I can't figure out where or how the cursor gets 
> positioned.  If someone could give me some pointers here, I'd love to 
> investigate further.

If you mean the text cursor, then it is positioned by calling cmgoto,
which is called from tty_cursor_to and tty_raw_cursor_to.

Frankly, I don't understand how the mouse could affect the cursor
positioning.  Do you mean the cursor position is wrong when you click
the mouse?