coc.vimrc

" coc
"
" May need for Vim (not Neovim) since coc.nvim calculates byte offset by count
" utf-8 byte sequence
set encoding=utf-8
" Some servers have issues with backup files, see #649
set nobackup
set nowritebackup

" Having longer updatetime (default is 4000 ms = 4s) leads to noticeable
" delays and poor user experience
set updatetime=300

" Use tab for trigger completion with characters ahead and navigate
" NOTE: There's always complete item selected by default, you may want to enable
" no select by `"suggest.noselect": true` in your configuration file
inoremap <silent><expr> <TAB>
    \ coc#pum#visible() ? coc#pum#next(1) :
    \ CheckBackspace() ? "\<Tab>" :
    \ coc#refresh()
inoremap <expr><S-TAB> coc#pum#visible() ? coc#pum#prev(1) : "\<C-h>"

function! CheckBackspace() abort
    let col = col('.') - 1
    return !col || getline('.')[col - 1]  =~# '\s'
endfunction

" GoTo code navigation
nmap gd <Plug>(coc-definition)
nmap gy <Plug>(coc-type-definition)
nmap gi <Plug>(coc-implementation)
nmap gr <Plug>(coc-references)

" Highlight the symbol and its references when holding the cursor
autocmd CursorHold * silent call CocActionAsync('highlight')
autocmd VimEnter * highlight CocHighlightText ctermfg=White ctermbg=Blue

" Errors highlighting
highlight CocErrorHighlight cterm=underline
highlight CocWarningHighlight cterm=underline

" Symbol renaming
nmap <Leader>rn <Plug>(coc-rename)

" Remap keys for applying refactor code actions
nmap <silent> <Leader>re <Plug>(coc-codeaction-refactor)
xmap <silent> <Leader>r  <Plug>(coc-codeaction-refactor-selected)
nmap <silent> <Leader>r  <Plug>(coc-codeaction-refactor-selected)