Re: Mouse-hovering over 'mouse-face' overlays/regions on a TTY Emacs

[Eli Zaretskii]

> Date: Mon, 30 Nov 2020 23:10:54 -0800
> From: Jared Finder <jared@finder.org>
> Cc: Eli Zaretskii <eliz@gnu.org>, emacs-devel@gnu.org
> 
> I found the following two suspect lines that sound related, but it's 
> unclear to me what they're for.  Does anyone know what functionality 
> they enable?  (Note: I have some local changes, so my line numbers may 
> be slightly off.)
> 
> term.c:4253
>    tty->mouse_highlight.mouse_face_window = Qnil;
> 
> xdisp.c:20783
>         gui_clear_window_mouse_face (w);

They are necessary parts of mouse-highlight implementation, and should
be indeed enabled in all builds nowadays.

> Additionally, it looks like set-mouse-position and 
> set-mouse-pixel-position in frame.c does not behave consistently on TTYs 
> if Emacs is compiled with window system support vs without.

You mean, if Emacs is compiled with X _and_ with GPM?  Otherwise I
don't think I see the issue.