From abd491cf601d29ddfdd0bff091230259a2b089e7 Mon Sep 17 00:00:00 2001
From: ansuz <ansuz@transitiontech.ca>
Date: Thu, 26 Sep 2019 11:56:53 +0200
Subject: [PATCH] keep trying to draw the preview pane, if necessary

---
 www/code/inner.js | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/www/code/inner.js b/www/code/inner.js
index 7f043a9c9..7c5e64c4f 100644
--- a/www/code/inner.js
+++ b/www/code/inner.js
@@ -227,6 +227,20 @@ define([
                 $(window).off('mouseup mousemove', handler);
                 $(window).on('mouseup mousemove', handler);
             });
+
+            var previewInt;
+            var clear = function () { clearInterval(previewInt); };
+
+            // keep trying to draw until you're confident it has been drawn
+            previewInt = setInterval(function () {
+                // give up if it's not a valid preview mode
+                if (['markdown', 'gfm'].indexOf(CodeMirror.highlightMode) === -1) { return void clear(); }
+                // give up if content has been drawn
+                if ($preview.text()) { return void clear(); }
+                // only draw if there is actually content to display
+                if (editor && !editor.getValue().trim()) { return void clear(); }
+                forceDrawPreview();
+            }, 1000);
         });
 
         framework._.sfCommon.getPadAttribute('previewMode', function (e, data) {