From d937491545a5d7eb145c5c288985a33f56dba2c2 Mon Sep 17 00:00:00 2001
From: mappu <mappu04@gmail.com>
Date: Sun, 5 Feb 2017 20:57:38 +1300
Subject: [PATCH] client: add warning popup if closing the tab while the
 connection is still open

---
 client/dcwebui.js | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/client/dcwebui.js b/client/dcwebui.js
index 8d57042..e31a702 100644
--- a/client/dcwebui.js
+++ b/client/dcwebui.js
@@ -974,6 +974,16 @@ window.onload = function() {
 		usermenu.hide();
 	};
 	
+	window.onbeforeunload = function (e) {
+		if (hub_state === STATE_ACTIVE) {
+			// n.b. recent Firefox / Chrome don't display the custom message here.
+			var confirmationMessage = "Still connected to the hub \"" + hub_hubname + "\".\nAre you sure you want to close?";
+			e.returnValue = confirmationMessage;
+			return confirmationMessage;
+		}
+		// else: ignore
+	};
+	
 	timestamp_format_index = persistence_get("timestamps", 0);
 	
 	desktop_notifications_enabled = persistence_get("popups");