Re: Display duplicate messages in emacs front-end

Subject: Re: Display duplicate messages in emacs front-end

Date: Wed, 09 Nov 2022 11:55:36 -0500



From: Daniel Kahn Gillmor

On Wed 2022-11-09 09:53:26 -0500, Daniel Kahn Gillmor wrote:
> The functionality here, switching between duplicates in the emacs
> frontend, is great.  I needed to use it today, because i had two copies
> of an e-mail message, one with a valid signature and one with a damaged
> signature.  It Just Worked™ to let me switch between the different
> variants.

Now that i'm playing with this feature specifically, it occurs to me
that the primary use case is likely to be where there are two or maybe 3
duplicates of a given message.

In this use case, the emacs bindings could be a bit more ergonomic.

The current binding is '%', which then prompts the user for "duplicate:"
and the user is obliged to type in the number of the duplicate that they

When i'm looking at duplicate 1/2, the obvious answer is i want 2/2.
when i'm looking at 2/2, i want 1/2.  The current interface, while nice
and fully flexible makes me do extra work :)

Here's a proposed update:

 - '%' on its own moves to duplicate n+1 (wrapping around from the max
   back to 1)

 - prefixed '%' (that is, 'C-u %') yields the current behavior where the
   user can enter which specific duplicate they want.

My elisp remains rudimentary at best, so i don't know that i know how to
make this fix (in particular, i'm not sure how i retrieve the current
values N/M, in order to calculate mod_M(N)+1), but i'd be happy to test
any patch that does this.

I don't know how people feel about changing the default keybindings on a
relatively recent feature -- would it be upsetting to users if the
behavior of % changed in this subtle way?

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