Re: "Final" version of tty child frames

[Eli Zaretskii]

> Date: Sun, 05 Jan 2025 16:18:24 -0800
> From: Jared Finder <jared@finder.org>
> Cc: rudalics@gmx.at, gerd.moellmann@gmail.com, emacs-devel@gnu.org
> 
> On 2025-01-04 22:46, Eli Zaretskii wrote:
> > 
> > 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?
> 
> Emacs understanding of point ends up correct when I click the mouse, but 
> the cursor is incorrect.  This only applies to some lines.  I get 
> similar issues when using arrow keys for moving the point around as 
> well.  I do not see the same behavior in an xterm.  This predates my 
> change.  It only happens when tty child frames are visible with 
> TERM=linux, as far as I can tell.

Maybe some code moves the cursor after setting it according to the
click?  E.g., to redraw some part of the window?  We must move the
cursor before drawing anything on a TTY.

I hope the functions Gerd and myself mentioned will help you find the
culprit.