From 868c44b23949d7d1f677e8e7d6e4832ca2f0510e Mon Sep 17 00:00:00 2001
From: Leon Krause
Date: Wed, 9 May 2018 15:57:10 +0200
Subject: Fix keyboard focus lock-out with HTML5 canvas in iframe

(cherry picked from commit 9080e96bc81328e658a03e2cd248c06ddbf9f2ec)
---
 platform/javascript/engine.js | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'platform/javascript/engine.js')

diff --git a/platform/javascript/engine.js b/platform/javascript/engine.js
index 06ff96bc3..329a4fc18 100644
--- a/platform/javascript/engine.js
+++ b/platform/javascript/engine.js
@@ -173,6 +173,10 @@
 			actualCanvas.style.padding = 0;
 			actualCanvas.style.borderWidth = 0;
 			actualCanvas.style.borderStyle = 'none';
+			// disable right-click context menu
+			actualCanvas.addEventListener('contextmenu', function(ev) {
+				ev.preventDefault();
+			}, false);
 			// until context restoration is implemented
 			actualCanvas.addEventListener('webglcontextlost', function(ev) {
 				alert("WebGL context lost, please reload the page");
-- 
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