Add a dired-narrow command that uses completion-styles

[noctuid]

Use user's completion filtering setup for narrowing.

[Fuco1]

I'm sorry to not going through this pull request sooner (much sooner!). I tried the code and I can't make it work, it's giving me some nil errors.

The way this package works is that it calls the filter function on each line, expecting it to give true or false for that particular file. How does this interact with a completion framework? That one takes a list of all options and returns some possible options based on the filter. So I think it's not a good fit here.

[noctuid]

How does this interact with a completion framework?

It doesn't interact with a completion framework like helm/ivy/vertico if that's what you mean; it interacts with the builtin completion-styles and related settings. Emacs has flex/initials/etc. matching as builtin options, so you could set completion-styles to include flex and "drd" would match "dired". I'm using orderless which allows for much more customization. If you haven't seen it, it supports any combination of literal, flex, regexp, initials, etc. and allows incrementally building a query with multiple e.g. space-separated patterns, changing pattern rules based on the input, negative patterns like !.org, etc. So this new function lets you use something like orderless patterns to narrow, not something like helm.

That one takes a list of all options and returns some possible options based on the filter.

Yes, how the completion functions work doesn't match dired-narrow filtering one at at time, but I don't think that really matters. You can just pass one item in the table, and the performance is the same as the already existing commands from what I've seen.

it's giving me some nil errors.

Updated so it should work with the default available completion-styles. Try now.

[Fuco1]

Thank you so much for the comment and explanation. This must be some new(ish) feature because I have never heard of it 😊