Coc integration

autoload/airline/extensions.vim

@@ -272,6 +272,11 @@ function! airline#extensions#load()
     call add(s:loaded_ext, 'ale')
   endif
 
+  if (get(g:, 'airline#extensions#coc#enabled', 1) && exists(':CocCommand'))
+    call airline#extensions#coc#init(s:ext)
+    call add(s:loaded_ext, 'coc')
+  endif
+
   if (get(g:, 'airline#extensions#languageclient#enabled', 1) && exists(':LanguageClientStart'))
     call airline#extensions#languageclient#init(s:ext)
     call add(s:loaded_ext, 'languageclient')

autoload/airline/extensions/coc.vim

@@ -0,0 +1,40 @@
+
+let s:error_symbol = get(g:, 'airline#extensions#coc#error_symbol', 'E:')
+let s:warning_symbol = get(g:, 'airline#extensions#coc#warning_symbol', 'W:')
+
+function! airline#extensions#coc#get_warning()
+  return airline#extensions#coc#get('warning')
+endfunction
+
+function! airline#extensions#coc#get_error()
+  return airline#extensions#coc#get('error')
+endfunction
+
+function! airline#extensions#coc#get(type)
+  let _backup = get(g:, 'coc_stl_format', '')
+  let is_err = (a:type  is# 'error')
+  if is_err
+    let g:coc_stl_format = get(g:, 'airline#extensions#coc#stl_format_err', '%E{[%e(#%fe)]}')
+  else
+    let g:coc_stl_format = get(g:, 'airline#extensions#coc#stl_format_warn', '%W{[%w(#%fw)]}')
+  endif
+  let info = get(b:, 'coc_diagnostic_info', {})
+  if empty(info) | return '' | endif
+
+
+  let cnt = get(info, a:type, 0)
+  if !empty(_backup)
+    let g:coc_stl_format = _backup
+  endif
+
+  if empty(cnt)
+    return ''
+  else
+    return (is_err ? s:error_symbol : s:warning_symbol).cnt
+  endif
+endfunction
+
+function! airline#extensions#coc#init(ext)
+  call airline#parts#define_function('coc_error_count', 'airline#extensions#coc#get_error')
+  call airline#parts#define_function('coc_warning_count', 'airline#extensions#coc#get_warning')
+endfunction

autoload/airline/init.vim

@@ -211,9 +211,9 @@ function! airline#init#sections()
     endif
   endif
   if !exists('g:airline_section_error')
-    let g:airline_section_error = airline#section#create(['ycm_error_count', 'syntastic-err', 'eclim', 'neomake_error_count', 'ale_error_count', 'languageclient_error_count'])
+    let g:airline_section_error = airline#section#create(['ycm_error_count', 'syntastic-err', 'eclim', 'neomake_error_count', 'ale_error_count', 'languageclient_error_count', 'coc_error_count'])
   endif
   if !exists('g:airline_section_warning')
-    let g:airline_section_warning = airline#section#create(['ycm_warning_count',  'syntastic-warn', 'neomake_warning_count', 'ale_warning_count', 'languageclient_warning_count', 'whitespace'])
+    let g:airline_section_warning = airline#section#create(['ycm_warning_count',  'syntastic-warn', 'neomake_warning_count', 'ale_warning_count', 'languageclient_warning_count', 'whitespace', 'coc_warning_count'])
   endif
 endfunction

doc/airline.txt

@@ -546,6 +546,24 @@ vim-capslock <https://github.com/tpope/vim-capslock>
 * enable/disable vim-capslock integration >
   let g:airline#extensions#capslock#enabled = 1
 
+-------------------------------------                    *airline-coc*
+coc <https://github.com/neoclide/coc>
+
+* enable/disable coc integration >
+  let g:airline#extensions#coc#enabled = 1
+<
+* change error symbol: >
+  let airline#extensions#coc#error_symbol = 'E:'
+<
+* change warning symbol: >
+  let airline#extensions#coc#warning_symbol = 'W:'
+<
+* change error format: >
+  let airline#extensions#coc#stl_format_err = '%E{[%e(#%fe)]}'
+<
+* change warning format: >
+  let airline#extensions#coc#stl_format_warn = '%W{[%w(#%fw)]}'
+
 -------------------------------------                          *airline-csv*
 csv.vim <https://github.com/chrisbra/csv.vim>