From f0990faa56b05f62335a3759b817deabd65efab6 Mon Sep 17 00:00:00 2001
From: Paddy Xu <xupaddy@gmail.com>
Date: Thu, 21 Dec 2017 18:54:24 +0200
Subject: [PATCH] Revert "Async call sometimes crash because
 NullReferenceException at <BeginShow>b__0()"

This reverts commit b0e4f19491074ed4a81cd3a600f4ca9a59b797f0.
---
 QuickLook/ViewerWindow.Actions.cs | 22 +++++++++++++---------
 1 file changed, 13 insertions(+), 9 deletions(-)

diff --git a/QuickLook/ViewerWindow.Actions.cs b/QuickLook/ViewerWindow.Actions.cs
index b8ddb71..d6e8ded 100644
--- a/QuickLook/ViewerWindow.Actions.cs
+++ b/QuickLook/ViewerWindow.Actions.cs
@@ -192,15 +192,19 @@ namespace QuickLook
             ShowWindowCaptionContainer(null, null);
             //WindowHelper.SetActivate(new WindowInteropHelper(this), ContextObject.CanFocus);
 
-            // load plugin, sync
-            try
-            {
-                Plugin.View(path, ContextObject);
-            }
-            catch (Exception e)
-            {
-                exceptionHandler(path, ExceptionDispatchInfo.Capture(e));
-            }
+            // load plugin, do not block UI
+            Dispatcher.BeginInvoke(new Action(() =>
+                {
+                    try
+                    {
+                        Plugin.View(path, ContextObject);
+                    }
+                    catch (Exception e)
+                    {
+                        exceptionHandler(path, ExceptionDispatchInfo.Capture(e));
+                    }
+                }),
+                DispatcherPriority.Input);
         }
 
         private void SetOpenWithButtonAndPath()