Matching color schemes

Problems summary

I’d like some configuration option similar to fzf-vim for matching the fzf color scheme to vim’s current.

" Customize fzf colors to match your color scheme
" - fzf#wrap translates this to a set of `--color` options
let g:fzf_colors =
\ { 'fg':      ['fg', 'Normal'],
  \ 'bg':      ['bg', 'Normal'],
  \ 'hl':      ['fg', 'Comment'],
  \ 'fg+':     ['fg', 'CursorLine', 'CursorColumn', 'Normal'],
  \ 'bg+':     ['bg', 'CursorLine', 'CursorColumn'],
  \ 'hl+':     ['fg', 'Statement'],
  \ 'info':    ['fg', 'PreProc'],
  \ 'border':  ['fg', 'Ignore'],
  \ 'prompt':  ['fg', 'Conditional'],
  \ 'pointer': ['fg', 'Exception'],
  \ 'marker':  ['fg', 'Keyword'],
  \ 'spinner': ['fg', 'Label'],
  \ 'header':  ['fg', 'Comment'] }

In this dictionary, fzf color scheme will always match vim’s. Is this possible?

Expected

A config option existed to keep fzf and vim color scheme in sync.

Environment Information

• fzf-preview version (package.json): HEAD

• OS: Fedora 32

• Vim/Neovim version: Vim 8

Provide a minimal init.vim

" call plug#begin('~/.vim/plugged')
" Plug 'junegunn/fzf'
" Plug 'neoclide/coc.nvim', {'branch': 'release'}
" Plug 'ryanoasis/vim-devicons'
" call plug#end()
" 
" let g:coc_global_extensions = ['coc-fzf-preview']

Screenshot

Dockerfile that reproduces the problem (if possible)

Refer to https://github.com/yuki-ycino/fzf-preview.vim/blob/master/.github/issue_example/Dockerfile

[yuki-yano]

If it is resolved, I will close it once. I’ll consider implementing it when the need arises.

[yuki-yano]

If you use reflection, I have confirmed that this code works, but you do so at your own risk. If the fzf code is changed, it will not work.

augroup fzf_preview
  autocmd!
  autocmd User fzf_preview#initialized call s:fzf_preview_settings()
augroup END

function! FzfColor()
  if !exists('g:fzf_colors')
    return ''
  endif

  let lines = filter(split(execute('script'), '\n'), { _, v -> v =~# 'junegunn/fzf/plugin/fzf.vim' })
  if len(lines) < 1
    return ''
  endif

  let file_nums = matchlist(lines[0], '^\s*\(\d\+\)')
  if len(file_nums) <= 1
    return ''
  endif

  let func_name = "\<SNR\>" . file_nums[1] . '_defaults()'
  if !exists('*' . func_name)
    return ''
  endif

  let option = matchlist(execute('echo ' . func_name), '''--color=\(.\+\)''')
  if len(option) <= 1
    return ''
  endif

  return option[1]
endfunction

let g:fzf_colors = {
\ 'fg':      ['fg', 'Normal'],
\ 'bg':      ['bg', 'Normal'],
\ 'hl':      ['fg', 'Comment'],
\ 'fg+':     ['fg', 'CursorLine', 'CursorColumn', 'Normal'],
\ 'bg+':     ['bg', 'CursorLine', 'CursorColumn'],
\ 'hl+':     ['fg', 'Statement'],
\ 'info':    ['fg', 'PreProc'],
\ 'border':  ['fg', 'Ignore'],
\ 'prompt':  ['fg', 'Conditional'],
\ 'pointer': ['fg', 'Exception'],
\ 'marker':  ['fg', 'Keyword'],
\ 'spinner': ['fg', 'Label'],
\ 'header':  ['fg', 'Comment']
\ }

function! s:fzf_preview_settings() abort
  let g:fzf_preview_fzf_color_option = FzfColor()
endfunction