Added visual mode word counting

autoload/airline/extensions/wordcount.vim

@@ -7,13 +7,19 @@ let s:formatter = get(g:, 'airline#extensions#wordcount#formatter', 'default')
 
 function! s:update()
   if match(&ft, s:filetypes) > -1
-    if get(b:, 'airline_wordcount_cache', '') is# '' ||
+    let l:mode = mode()
-          \ b:airline_wordcount_cache isnot# get(b:, 'airline_wordcount', '') ||
+    if l:mode ==# 'v' || l:mode ==# 'V' || l:mode ==# 's' || l:mode ==# 'S'
-          \ get(b:, 'airline_change_tick', 0) != b:changedtick
-      " cache data
       let b:airline_wordcount = airline#extensions#wordcount#formatters#{s:formatter}#format()
-      let b:airline_wordcount_cache = b:airline_wordcount
       let b:airline_change_tick = b:changedtick
+    else
+      if get(b:, 'airline_wordcount_cache', '') is# '' ||
+            \ b:airline_wordcount_cache isnot# get(b:, 'airline_wordcount', '') ||
+            \ get(b:, 'airline_change_tick', 0) != b:changedtick
+        " cache data
+        let b:airline_wordcount = airline#extensions#wordcount#formatters#{s:formatter}#format()
+        let b:airline_wordcount_cache = b:airline_wordcount
+        let b:airline_change_tick = b:changedtick
+      endif
     endif
   endif
 endfunction

autoload/airline/extensions/wordcount/formatters/default.vim

@@ -18,7 +18,17 @@ endfunction
 
 function! s:wordcount()
   if exists("*wordcount")
-    return wordcount()['words']
+    let l:mode = mode()
+    if l:mode ==# 'v' || l:mode ==# 'V' || l:mode ==# 's' || l:mode ==# 'S'
+      let l:visual_words = wordcount()['visual_words']
+      if l:visual_words != ''
+        return l:visual_words
+      else
+        return 0
+      endif
+    else
+      return wordcount()['words']
+    endif
   elseif mode() =~? 's'
     return
   else
@@ -41,7 +51,7 @@ endfunction
 function s:get_decimal_group()
   if match(v:lang, '\v\cC|en') > -1
     return ','
-  elseif match(v:lang, '\v\cde|dk|fr') > -1
+  elseif match(v:lang, '\v\cde|dk|fr|pt') > -1
     return '.'
   endif
   return ''