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lambdalisue / vim-fern-mapping-project-top

MIT License
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Having user defined code that calls a fern action breaks fern #3

Closed drazulay closed 3 years ago

drazulay commented 3 years ago

@lambdalisue I call a fern action like:

function! s:init_fern() abort
  call fern#action#call('project-top:reveal')
endfunction
augroup my-fern
  au! *
  au FileType fern call s:init_fern()
augroup END

After re-sourcing config, the drawer shows nothing the first time, then doesn't open at all.

Could it be that fern#action#call('project-top:reveal') is executed too soon?

Thank you for your outstanding modules :)

drazulay commented 3 years ago

Update:

I got it partially working by using this code instead:

function! s:init_fern() abort
  if exists('b:fern')
    call fern#action#call("project-top:reveal")
  endif
endfunction
augroup my-fern
  au! *
  au BufReadCmd fern://* call s:init_fern()
augroup END

It takes a few times opening and closing the drawer before the tree is rendered completely, so it's still not optimal.

Do you have suggestions for getting it to load and expand the tree at once?

Thanks!

lambdalisue commented 3 years ago

See :help ++nested

drazulay commented 3 years ago

I assume you mean to use au BufReadCmd fern://* nested call s:init_fern() -- actually that's what I started out with because I plucked that straight from your fern code.

However, this doesn't change the behavior for me. I think it's more likely there should be another hook specific to the functionality of project-top instead of init_fern, say.. project_top_reveal_after or something like that. At least that would work for me.

Meanwhile I moved to another solution for filesystem navigation, so if you don't think this is an issue feel free to close it.

lambdalisue commented 3 years ago

Ah, I'm sorry I misunderstood your question. Well, there is a viewer:ready hook for that purpose which is documented in the developer's help

https://github.com/lambdalisue/fern.vim/blob/master/doc/fern-develop.txt#L281

Not sure if the below works or not. Use it at your own risk.

call fern#hook#add('viewer:ready', { -> fern#action#call('project-top:reveal') })
drazulay commented 3 years ago

That's what I was looking for, thanks.