updated coc config file

neovim/.config/nvim/coc.vim

@@ -1,30 +1,36 @@
-" TextEdit might fail if hidden is not set.
-set hidden
 
+" May need for vim (not neovim) since coc.nvim calculate 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
 
-" Give more space for displaying messages.
-set cmdheight=2
-
 " Having longer updatetime (default is 4000 ms = 4 s) leads to noticeable
 " delays and poor user experience.
 set updatetime=300
 
-" Don't pass messages to |ins-completion-menu|.
-set shortmess+=c
+" Always show the signcolumn, otherwise it would shift the text each time
+" diagnostics appear/become resolved.
+set signcolumn=yes
 
 " 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.
 " NOTE: Use command ':verbose imap <tab>' to make sure tab is not mapped by
 " other plugin before putting this into your config.
 inoremap <silent><expr> <TAB>
-      \ pumvisible() ? "\<C-n>" :
-      \ <SID>check_back_space() ? "\<TAB>" :
+      \ coc#pum#visible() ? coc#pum#next(1) :
+      \ CheckBackspace() ? "\<Tab>" :
       \ coc#refresh()
-inoremap <expr><S-TAB> pumvisible() ? "\<C-p>" : "\<C-h>"
+inoremap <expr><S-TAB> coc#pum#visible() ? coc#pum#prev(1) : "\<C-h>"
 
-function! s:check_back_space() abort
+" Make <CR> to accept selected completion item or notify coc.nvim to format
+" <C-g>u breaks current undo, please make your own choice.
+inoremap <silent><expr> <CR> coc#pum#visible() ? coc#pum#confirm()
+                              \: "\<C-g>u\<CR>\<c-r>=coc#on_enter()\<CR>"
+
+function! CheckBackspace() abort
   let col = col('.') - 1
   return !col || getline('.')[col - 1]  =~# '\s'
 endfunction
@@ -36,11 +42,6 @@ else
   inoremap <silent><expr> <c-@> coc#refresh()
 endif
 
-" Make <CR> auto-select the first completion item and notify coc.nvim to
-" format on enter, <cr> could be remapped by other vim plugin
-inoremap <silent><expr> <cr> pumvisible() ? coc#_select_confirm()
-                              \: "\<C-g>u\<CR>\<c-r>=coc#on_enter()\<CR>"
-
 " Use `[g` and `]g` to navigate diagnostics
 " Use `:CocDiagnostics` to get all diagnostics of current buffer in location list.
 nmap <silent> [g <Plug>(coc-diagnostic-prev)
@@ -53,15 +54,13 @@ nmap <silent> gi <Plug>(coc-implementation)
 nmap <silent> gr <Plug>(coc-references)
 
 " Use K to show documentation in preview window.
-nnoremap <silent> K :call <SID>show_documentation()<CR>
+nnoremap <silent> K :call ShowDocumentation()<CR>
 
-function! s:show_documentation()
-  if (index(['vim','help'], &filetype) >= 0)
-    execute 'h '.expand('<cword>')
-  elseif (coc#rpc#ready())
+function! ShowDocumentation()
+  if CocAction('hasProvider', 'hover')
     call CocActionAsync('doHover')
   else
-    execute '!' . &keywordprg . " " . expand('<cword>')
+    call feedkeys('K', 'in')
   endif
 endfunction
 
@@ -93,6 +92,9 @@ nmap <leader>ac  <Plug>(coc-codeaction)
 " Apply AutoFix to problem on the current line.
 nmap <leader>qf  <Plug>(coc-fix-current)
 
+" Run the Code Lens action on the current line.
+nmap <leader>cl  <Plug>(coc-codelens-action)
+
 " Map function and class text objects
 " NOTE: Requires 'textDocument.documentSymbol' support from the language server.
 xmap if <Plug>(coc-funcobj-i)
@@ -120,13 +122,13 @@ nmap <silent> <C-s> <Plug>(coc-range-select)
 xmap <silent> <C-s> <Plug>(coc-range-select)
 
 " Add `:Format` command to format current buffer.
-command! -nargs=0 Format :call CocAction('format')
+command! -nargs=0 Format :call CocActionAsync('format')
 
 " Add `:Fold` command to fold current buffer.
 command! -nargs=? Fold :call     CocAction('fold', <f-args>)
 
 " Add `:OR` command for organize imports of the current buffer.
-command! -nargs=0 OR   :call     CocAction('runCommand', 'editor.action.organizeImport')
+command! -nargs=0 OR   :call     CocActionAsync('runCommand', 'editor.action.organizeImport')
 
 " Add (Neo)Vim's native statusline support.
 " NOTE: Please see `:h coc-status` for integrations with external plugins that