From fe05761fe7740d073a29c52404226816a16ec952 Mon Sep 17 00:00:00 2001
From: "Veronica K. B. Olsen" <code@vkbo.net>
Date: Sat, 11 May 2019 01:14:03 +0200
Subject: [PATCH] Fixed the preview call so it only works on files.

---
 nw/gui/winmain.py | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/nw/gui/winmain.py b/nw/gui/winmain.py
index a313757e..a6125afe 100644
--- a/nw/gui/winmain.py
+++ b/nw/gui/winmain.py
@@ -201,13 +201,15 @@ class GuiMain(QMainWindow):
             logger.warning("No document selected")
             return
 
-        logger.debug("Generating preview for item %s" % tHandle)
-        self.stackPane.setCurrentIndex(self.stackView)
-        aDoc = ToHtml(self.theProject, self)
-        aDoc.setText(tHandle)
-        aDoc.tokenizeText()
-        aDoc.doConvert()
-        self.docViewer.setHtml(aDoc.theResult)
+        tItem = self.theProject.getItem(tHandle)
+        if tItem.itemType == nwItemType.FILE:
+            logger.debug("Generating preview for item %s" % tHandle)
+            self.stackPane.setCurrentIndex(self.stackView)
+            aDoc = ToHtml(self.theProject, self)
+            aDoc.setText(tHandle)
+            aDoc.tokenizeText()
+            aDoc.doConvert()
+            self.docViewer.setHtml(aDoc.theResult)
 
         return