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Re: Can watermarking Unicode text using invisible differences sneak thro
From: |
Richard Stallman |
Subject: |
Re: Can watermarking Unicode text using invisible differences sneak through Emacs, or can Emacs detect it? |
Date: |
Mon, 07 Feb 2022 22:55:54 -0500 |
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> > I think there are only around 20 diacritics.
> You are thinking of some subset, I think. The real number is more
> like 80,
I am amazed. Where can I see a list that shows more of them?
> That's a great simplification from a table
> > of hundreds of elements, set up by hand.
> Setting by hand was already done, and we have it in latin1-disp.el so
Do you mean, the table that presents a-with-breve-and-tilde as `a)?'?
I don't think that works well.
> > I don't follow you here. In particular, what does "complete
> > equivalent" mean?
> For example, "o?'" instead of "o" + "?" + "'" (to emulate ?\ṍ).
I don't understand the difference between "o?'" and "o" + "?" + "'".
They look like two ways of describing the same sequence of three characters.
Though ? would never make me think of tilde unless you told me.
With
> the former, you see the entire string that will be shown; with the
> latter, you need to imagine it
I can't follow that, since you're talking about two things that look
identical to me.
> What would you do with the likes of ?\ǿ (which we currently
> represent as "o/'")? Its base character, ø, doesn't have a
> decomposition in Unicode.
For my terminal, I'd like it to send ø literally since my terminal
can display that. `ø'' would be a good way to display it.
But on a terminal that can't display ø, `o/'' would be a good choice.
> > Not on a Linux console, I think. When I have f and i in the buffer,
> > Emacs does not convert them into a ligature. The only time it has to
> > try to deal with a ligature is when there is a Unicode ligature
> > code point in the buffer.
> Once again, on a TTY frame Emacs does NOT produce the ligatures nor
> combine base characters with the diacritics.
You have told me this several times, and I believe you. But how does
it relate to the case I am talking about? I don't see a relationship.
I was looking at a buffer containing a ligature character. It must
have come from a message or file that I looked at in that buffer. I
suppose Emacs did not _produce_ it, but it was in my buffer and I had
to use C-u C-x = to see what it was.
--
Dr Richard Stallman (https://stallman.org)
Chief GNUisance of the GNU Project (https://gnu.org)
Founder, Free Software Foundation (https://fsf.org)
Internet Hall-of-Famer (https://internethalloffame.org)
- Re: Can watermarking Unicode text using invisible differences sneak through Emacs, or can Emacs detect it?, (continued)
- Re: Can watermarking Unicode text using invisible differences sneak through Emacs, or can Emacs detect it?, Tomas Hlavaty, 2022/02/05
- Re: Can watermarking Unicode text using invisible differences sneak through Emacs, or can Emacs detect it?, Richard Stallman, 2022/02/05
- Re: Can watermarking Unicode text using invisible differences sneak through Emacs, or can Emacs detect it?, Richard Stallman, 2022/02/05
- Re: Can watermarking Unicode text using invisible differences sneak through Emacs, or can Emacs detect it?, Tomas Hlavaty, 2022/02/06
- Re: Can watermarking Unicode text using invisible differences sneak through Emacs, or can Emacs detect it?, Richard Stallman, 2022/02/03
- Re: Can watermarking Unicode text using invisible differences sneak through Emacs, or can Emacs detect it?, Eli Zaretskii, 2022/02/04
- Re: Can watermarking Unicode text using invisible differences sneak through Emacs, or can Emacs detect it?, Richard Stallman, 2022/02/05
- Re: Can watermarking Unicode text using invisible differences sneak through Emacs, or can Emacs detect it?, Eli Zaretskii, 2022/02/06
- Re: Can watermarking Unicode text using invisible differences sneak through Emacs, or can Emacs detect it?, Richard Stallman, 2022/02/07
- Re: Can watermarking Unicode text using invisible differences sneak through Emacs, or can Emacs detect it?, Eli Zaretskii, 2022/02/07
- Re: Can watermarking Unicode text using invisible differences sneak through Emacs, or can Emacs detect it?,
Richard Stallman <=
- Re: Can watermarking Unicode text using invisible differences sneak through Emacs, or can Emacs detect it?, Eli Zaretskii, 2022/02/08
- Re: Can watermarking Unicode text using invisible differences sneak through Emacs, or can Emacs detect it?, Richard Stallman, 2022/02/08
- Re: Can watermarking Unicode text using invisible differences sneak through Emacs, or can Emacs detect it?, Eli Zaretskii, 2022/02/09
- Re: Can watermarking Unicode text using invisible differences sneak through Emacs, or can Emacs detect it?, Richard Stallman, 2022/02/09
- Re: Can watermarking Unicode text using invisible differences sneak through Emacs, or can Emacs detect it?, Eli Zaretskii, 2022/02/10
- Re: Can watermarking Unicode text using invisible differences sneak through Emacs, or can Emacs detect it?, Richard Stallman, 2022/02/11
- Re: Can watermarking Unicode text using invisible differences sneak through Emacs, or can Emacs detect it?, Eli Zaretskii, 2022/02/12
- Re: Can watermarking Unicode text using invisible differences sneak through Emacs, or can Emacs detect it?, Richard Stallman, 2022/02/13
- Re: Can watermarking Unicode text using invisible differences sneak through Emacs, or can Emacs detect it?, Eli Zaretskii, 2022/02/14
- Re: Can watermarking Unicode text using invisible differences sneak through Emacs, or can Emacs detect it?, Richard Stallman, 2022/02/14