From 6faaeed153a19bb2b89f57c9d3223c1bee8407f5 Mon Sep 17 00:00:00 2001
From: Robin Clowers <robin.clowers@gmail.com>
Date: Fri, 2 Feb 2018 13:19:44 -0800
Subject: [PATCH] Fix collapsing html email preview

In some cases, the css of an email may cause the
`document.body.clientHeight` to report 0, which collapses the email
preview iframe. Using `contentWindow.outerHeight` seems to work around
this issue.
---
 lib/bamboo/plug/sent_email_viewer/index.html.eex | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/bamboo/plug/sent_email_viewer/index.html.eex b/lib/bamboo/plug/sent_email_viewer/index.html.eex
index 8680e0cf..005e3d3e 100644
--- a/lib/bamboo/plug/sent_email_viewer/index.html.eex
+++ b/lib/bamboo/plug/sent_email_viewer/index.html.eex
@@ -175,8 +175,8 @@
           <p class="email-detail-body">
             <script>
             function adjustFrameHeight(iframe) {
-              var body = iframe.contentWindow.document.body;
-              iframe.style.height = (body.scrollHeight + body.offsetHeight - body.clientHeight) + "px";
+              var contentWindow = iframe.contentWindow;
+              iframe.style.height = (contentWindow.outerHeight) + "px";
             }
             </script>
             <iframe onload="adjustFrameHeight(this)" src="<%= "#{@base_path}/#{Bamboo.SentEmail.get_id(@selected_email)}/html" %>"></iframe>