updated nrrwrgn integration

autoload/airline/extensions/nrrwrgn.vim

@@ -8,13 +8,43 @@ endif
 function! airline#extensions#nrrwrgn#apply(...)
   if exists(":WidenRegion") == 2
     let spc = g:airline_symbols.space
+    if !exists("*nrrwrgn#NrrwRgnStatus()") || empty(nrrwrgn#NrrwRgnStatus())
       call a:1.add_section('airline_a', printf('%s[Narrowed%s#%d]', spc, spc, b:nrrw_instn))
-    if exists('*airline#extensions#branch#get_head')
-      call a:1.add_section('airline_b', spc.'%{airline#extensions#branch#get_head()}'.spc)
-    endif
       let bufname=(get(b:, 'orig_buf', 0) ? bufname(b:orig_buf) : substitute(bufname('%'), '^Nrrwrgn_\zs.*\ze_\d\+$', submatch(0), ''))
       call a:1.add_section('airline_c', spc.bufname.spc)
       call a:1.split()
+    else
+      let dict=nrrwrgn#NrrwRgnStatus()
+      let vmode = { 'v': 'Char ', 'V': 'Line ', '': 'Block '}
+      let mode = dict.visual ? vmode[dict.visual] : vmode['V']
+      let winwidth = winwidth(0)
+      if winwidth < 80
+        let mode = mode[0]
+      endif
+      let title = (winwidth < 80 ? "Nrrw" : "Narrowed ")
+      let multi = (winwidth < 80 ? 'M' : 'Multi')
+      call a:1.add_section('airline_a', printf('[%s%s%s#%d]%s', (dict.multi ? multi : ""),
+        \ title, mode, b:nrrw_instn, spc))
+      let name = dict.fullname
+      if name !=# '[No Name]'
+        if winwidth > 100
+          " need some space
+          let name = fnamemodify(dict.fullname, ':~')
+          if strlen(name) > 8
+            " shorten name
+            let name = substitute(name, '\(.\)[^/\\]*\([/\\]\)', '\1\2', 'g')
+          endif
+        else
+          let name = fnamemodify(dict.fullname, ':t')
+        endif
+      endif
+      let range=(dict.multi ? '' : printf("[%d-%d]", dict.start[1], dict.end[1]))
+      call a:1.add_section('airline_c', printf("%s %s %s", name, range, dict.enabled ? "\u2713" : '!'))
+      call a:1.split()
+      call a:1.add_section('airline_x', get(g:, 'airline_section_x').spc)
+      call a:1.add_section('airline_y', spc.get(g:, 'airline_section_y').spc)
+      call a:1.add_section('airline_z', spc.get(g:, 'airline_section_z'))
+    endif
     return 1
   endif
 endfunction