From cd63a1667dfe36f249658e14dfc98f404163171a Mon Sep 17 00:00:00 2001
From: Tobias Fischer <tobias.carl.fischer@gmail.com>
Date: Wed, 28 Dec 2016 19:08:59 +0100
Subject: [PATCH] Set -Djava.awt.headless=true in EpubChecker class // fixes
 #665

needs to be set as early as possible in a static way
---
 src/main/java/com/adobe/epubcheck/tool/EpubChecker.java | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/main/java/com/adobe/epubcheck/tool/EpubChecker.java b/src/main/java/com/adobe/epubcheck/tool/EpubChecker.java
index a2953c5bc..4fde0d3ad 100644
--- a/src/main/java/com/adobe/epubcheck/tool/EpubChecker.java
+++ b/src/main/java/com/adobe/epubcheck/tool/EpubChecker.java
@@ -62,6 +62,13 @@
 public class EpubChecker
 {
 
+  static {
+    /* fix #665 (window-less "Checker" gui app on Mac)
+     * set -Djava.awt.headless=true programmatically as early as possible
+     */
+    System.setProperty("java.awt.headless", "true");
+  }
+
   String path = null;
   String mode = null;
   EPUBProfile profile = null;