From a2e20bc3ca7f68403f916da2b2344718db92bdd0 Mon Sep 17 00:00:00 2001
From: Christian Brabandt <cb@256bit.org>
Date: Tue, 1 Aug 2017 19:25:20 +0200
Subject: [PATCH] spell: Display spelling language

fixes: #1521
---
 autoload/airline/init.vim  |  1 +
 autoload/airline/parts.vim | 12 +++++++++++-
 doc/airline.txt            |  4 ++++
 3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/autoload/airline/init.vim b/autoload/airline/init.vim
index d718a245..1c68429e 100644
--- a/autoload/airline/init.vim
+++ b/autoload/airline/init.vim
@@ -25,6 +25,7 @@ function! airline#init#bootstrap()
   call s:check_defined('g:airline_detect_paste', 1)
   call s:check_defined('g:airline_detect_crypt', 1)
   call s:check_defined('g:airline_detect_spell', 1)
+  call s:check_defined('g:airline_detect_spelllang', 1)
   call s:check_defined('g:airline_detect_iminsert', 0)
   call s:check_defined('g:airline_inactive_collapse', 1)
   call s:check_defined('g:airline_exclude_filenames', ['DebuggerWatch','DebuggerStack','DebuggerStatus'])
diff --git a/autoload/airline/parts.vim b/autoload/airline/parts.vim
index f7b56fb8..a9820622 100644
--- a/autoload/airline/parts.vim
+++ b/autoload/airline/parts.vim
@@ -65,7 +65,17 @@ function! airline#parts#paste()
 endfunction
 
 function! airline#parts#spell()
-  return g:airline_detect_spell && &spell ? g:airline_symbols.spell : ''
+  let spelllang = g:airline_detect_spelllang ? printf(" [%s]", toupper(substitute(&spelllang, ',', '/', 'g'))) : ''
+  if g:airline_detect_spell && &spell
+    if winwidth(0) >= 90
+      return g:airline_symbols.spell . spelllang
+    elseif winwidth(0) >= 70
+      return g:airline_symbols.spell
+    else
+      return split(g:airline_symbols.spell, '\zs')[0]
+    endif
+  endif
+  return ''
 endfunction
 
 function! airline#parts#iminsert()
diff --git a/doc/airline.txt b/doc/airline.txt
index 86180185..32fd4a98 100644
--- a/doc/airline.txt
+++ b/doc/airline.txt
@@ -131,6 +131,10 @@ values):
 
 * enable spell detection >
   let g:airline_detect_spell=1
+
+* display spelling language when spell detection is enabled
+  (if enough space is available) >
+  let g:airline_detect_spelllang=1
 <
 * enable iminsert detection >
   let g:airline_detect_iminsert=0