[Feature request] New 'FernLeadingText' highlight group

[bluz71]

Hello @lambdalisue,

I have been experimenting with Fern visual style via these setting:

let g:fern#renderer#default#leading = '▏ '
let g:fern#renderer#default#leaf_symbol = '*  '

However, I notice the highlighting does not look good as seen in this screenshot:

I want the leaf_symbol (currently *) styled in blue and collapsed_symbol / expanded_symbol and leading (indent character) in dark grey.

Currently there are two main highlight groups effecting this area: FernBranchSymbol and FernLeafSymbol. The leading text inherits its style from both of these highlight groups depending if the current line contains leaves or nodes. So the leading (indent) text sometimes is blue, other times grey. Which looks bad.

For consistency, I believe the leading text should always be styled with the same color; hence the request for a new highlight group FernLeadingText. An alternative would be to always style leading with FernBranchSymbol highlighting. That would also solve my issue.

Best regards.

[bluz71]

Note, in the above example:

• FernBranchSymbol is set to dark grey.
• FernLeafSymbol is set to blue.

[bluz71]

The code in question is in autoload/fern/renderer/default.vim (from line 40).

I spent some time there, but in reality I don't understand how that code works, so I will be unable to assist here. I suspect behaviour will stay as is I suppose.

[brandon1024]

I've got a fix for this. I'll open a pull request over the weekend 👍

[bluz71]

Wonderful. That looks perfect. Very much looking forward to the PR.

[bluz71]

Thank you @brandon1024 and @lambdalisue, this is a very nice update to fern.vim.

I have updated my themes moonfly and nightfly with the new highlight groups & behaviour.

Cheers.

[lambdalisue]

Wow. I didn't know that and I really like nightfly theme thanks 🎉