c# (omnisharp,firenvim ) neovim coding for Exercism.org in browser (Firefox)

init.vim

call plug#begin(stdpath('data').'/plugged')
Plug 'glacambre/firenvim', { 'do': { _ -> firenvim#install(0) } } 
Plug 'junegunn/fzf', { 'do': { -> fzf#install() } }
Plug 'dense-analysis/ale'
Plug 'OmniSharp/omnisharp-vim'
Plug 'prabirshrestha/asyncomplete.vim'
Plug 'tpope/vim-commentary'  "comment-out by gc
Plug 'vim-airline/vim-airline'  " make statusline awesome
Plug 'vim-airline/vim-airline-themes'  " themes for statusline 
Plug 'ncm2/float-preview.nvim'	 
call plug#end()


" Classic_VIM_Configuration: {{{
" Don't autoselect first omnicomplete option, show options even if there is
" only
" one (so the preview documentation is accessible). Remove 'preview' if you
" don't want to see any documentation whatsoever.
" set completeopt=longest,menuone,preview
" set completepopup=highlight:Pmenu,border:off
" Set desired preview window height for viewing documentation.
" set previewpopup=height:10,width:60
" You might also want to look at the echodoc plugin.
colors zenburn
set number  " always show current line number           
set expandtab                                           
set tabstop=4                                           
set shiftwidth=4                                        
set softtabstop=4                                       
set hlsearch  " highlight search and search while typing
set incsearch                                           
set cpoptions+=x  " stay at seach item when <esc>
nnoremap <CR> :nohlsearch<CR><CR>                      
set mouse=a                                             
set previewheight=5
" Better nav for omnicomplete
inoremap <expr> <c-j> ("\<C-n>")
inoremap <expr> <c-k> ("\<C-p>")
" }}}


" Float: {{{
let g:float_preview#docked = 0
" }}}


" FIRENVIM: {{{
if exists('g:started_by_firenvim')
	colorscheme zenburn
endif
let g:firenvim_config = {
    \ 'localSettings': {
        \ 'https?://exercism.org.*': {
            \ 'filename': '/home/zbyna/Projekty/csharp-exercism/{hostname}_{pathname%10}.cs',
						\ },
				\ 'https?://github.com.*': {
            \ 'filename': '/tmp/{hostname}_{pathname%10}.markdown',
			\ },
   \ }
\ }
function Create_csproj()
"  silent !/home/zbyna/Projekty/csharp-vstudiocode/vytvareni_csproj/createcsproj.sh 
"	!sleep 10 - ani sleep nepomáhá, prostě je potřeba restartovat nvim no :-)
	set filetype=cs
endfunction
au BufEnter exercism.org_*.cs call Create_csproj()
au BufEnter github.com_*.markdown set filetype=markdown
" }}}


" ALE: {{{
let g:ale_sign_error = '•'
let g:ale_sign_warning = '•'
let g:ale_sign_info = '·'
let g:ale_sign_style_error = '·'
let g:ale_sign_style_warning = '·'
let g:ale_linters = { 'cs': ['OmniSharp'] }
" }}}


" Asyncomplete: {{{
let g:asyncomplete_auto_popup = 1
let g:asyncomplete_auto_completeopt = 1
" }}}


" OMNISHARP: {{{
"let g:OmniSharp_loglevel = 'debug'
let g:OmniSharp_popup = 1
let g:OmniSharp_popup_position = 'atcursor'
let g:OmniSharp_popup_options = {
  \ 'winhl': 'Normal:NormalFloat'
  \}
let g:OmniSharp_typeLookupInPreview = 1
let g:omnicomplete_fetch_full_documentation = 1
" Timeout in seconds to wait for a response from the server
let g:OmniSharp_timeout = 5
" Use fzf
let g:OmniSharp_selector_ui = 'fzf'    
let g:OmniSharp_selector_findusages = 'fzf'
" Update semantic highlighting on BufEnter and InsertLeave
let g:OmniSharp_highlight_types = 2
augroup omnisharp_commands
    autocmd!

    " Show type information automatically when the cursor stops moving
    autocmd CursorHold *.cs call OmniSharp#TypeLookupWithoutDocumentation()

    " The following commands are contextual, based on the cursor position.
    autocmd FileType cs nnoremap <buffer> gd :OmniSharpGotoDefinition<CR>
    autocmd FileType cs nnoremap <buffer> <Leader>fi :OmniSharpFindImplementations<CR>
    autocmd FileType cs nnoremap <buffer> <Leader>fs :OmniSharpFindSymbol<CR>
    autocmd FileType cs nnoremap <buffer> <Leader>fu :OmniSharpFindUsages<CR>

    " Finds members in the current buffer
    autocmd FileType cs nnoremap <buffer> <Leader>fm :OmniSharpFindMembers<CR>

    autocmd FileType cs nnoremap <buffer> <Leader>fx :OmniSharpFixUsings<CR>
    autocmd FileType cs nnoremap <buffer> <Leader>tt :OmniSharpTypeLookup<CR>
    autocmd FileType cs nnoremap <buffer> <Leader>dc :OmniSharpDocumentation<CR>
    autocmd FileType cs nnoremap <buffer> <C-\> :OmniSharpSignatureHelp<CR>
    autocmd FileType cs inoremap <buffer> <C-\> <C-o>:OmniSharpSignatureHelp<CR>

    " Navigate up and down by method/property/field
    autocmd FileType cs nnoremap <buffer> <C-k> :OmniSharpNavigateUp<CR>
    autocmd FileType cs nnoremap <buffer> <C-j> :OmniSharpNavigateDown<CR>

    " Find all code errors/warnings for the current solution and populate the quickfix window
    autocmd FileType cs nnoremap <buffer> <Leader>cc :OmniSharpGlobalCodeCheck<CR>
augroup END
" Contextual code actions (uses fzf, CtrlP or unite.vim when available)
nnoremap <Leader><Space> :OmniSharpGetCodeActions<CR>
" Run code actions with text selected in visual mode to extract method
xnoremap <Leader><Space> :call OmniSharpGetCodeActions('visual')<CR>
" Rename with dialog
nnoremap <Leader>nm :OmniSharpRename<CR>
nnoremap <F2> :OmniSharpRename<CR>
" Rename without dialog - with cursor on the symbol to rename: `:Rename newname`
command! -nargs=1 Rename :call OmniSharp#RenameTo("<args>")
nnoremap <Leader>cf :OmniSharpCodeFormat<CR>
"}}}


" AIRLINE: {{{
let g:airline_powerline_fonts = 1
let g:airline_section_y = ""
let g:airline#extensions#tabline#enabled = 1
" do not show error/warning section
let g:airline_section_error = ""
let g:airline_section_warning = ""
if !exists('g:airline_symbols')
    let g:airline_symbols = {}
endif
let g:airline_theme='zenburn'
" }}}