Re: Can watermarking Unicode text using invisible differences sneak through Emacs, or can Emacs detect it?

[Eli Zaretskii]

On January 25, 2022 6:16:29 AM GMT+02:00, Richard Stallman <rms@gnu.org> wrote:
>
>   >   When several characters are supposed to
>   > be composed on a text-mode display, Emacs simply writes them to the
>   > terminal one after another, and expects the terminal to display them
>   > as a ligature.  The only difference between what Emacs does in this
>   > case and what it does when no character composition is expected is
>   > that in the former case Emacs expects the terminal to produce just one
>   > glyph that takes just one column on display.
> 
> In that case, I think I it would be good to be able to tell Emacs,
> when using a text-only terminal, not to try to compose ligatures.
> Not to expect that sequence to display as one column.  Is that possible?
> 

This should already work: auto-composition-mode's value can be a symbol, to 
allow disabling that mode on uncapable terminals.  Maybe you need to customize 
the value to disable compositions on your console.