From 9bbd0098c576495b05dbc4d1615eb50bb93946c8 Mon Sep 17 00:00:00 2001
From: Jan Larres <jan@majutsushi.net>
Date: Wed, 6 Feb 2013 21:21:18 +1300
Subject: [PATCH] Don't update when in previewwindow, closes #112

---
 autoload/tagbar.vim | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/autoload/tagbar.vim b/autoload/tagbar.vim
index 8756cf2..32ce3e8 100644
--- a/autoload/tagbar.vim
+++ b/autoload/tagbar.vim
@@ -3342,6 +3342,11 @@ function! s:IsValidFile(fname, ftype) abort
         return 0
     endif
 
+    if &previewwindow
+        call s:LogDebugMessage('In preview window')
+        return 0
+    endif
+
     if !has_key(s:known_types, a:ftype)
         if exists('g:tagbar_type_' . a:ftype)
             " Filetype definition must have been specified in an 'ftplugin'