From daae3bd1ecfae565ff1ed7958c564ff73fb0eae0 Mon Sep 17 00:00:00 2001
From: Michael Telatynski <7t3chguy@gmail.com>
Date: Sat, 29 Apr 2017 06:25:30 +0100
Subject: [PATCH] warn on unload when uploading file(s)

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>
---
 src/components/structures/RoomView.js | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/components/structures/RoomView.js b/src/components/structures/RoomView.js
index a0c36374b6..9414a59e01 100644
--- a/src/components/structures/RoomView.js
+++ b/src/components/structures/RoomView.js
@@ -271,6 +271,7 @@ module.exports = React.createClass({
 
         this._updateConfCallNotification();
 
+        window.addEventListener('beforeunload', this.onPageUnload);
         window.addEventListener('resize', this.onResize);
         this.onResize();
 
@@ -353,6 +354,7 @@ module.exports = React.createClass({
             MatrixClientPeg.get().removeListener("accountData", this.onAccountData);
         }
 
+        window.removeEventListener('beforeunload', this.onPageUnload);
         window.removeEventListener('resize', this.onResize);
 
         document.removeEventListener("keydown", this.onKeyDown);
@@ -365,6 +367,14 @@ module.exports = React.createClass({
         // Tinter.tint(); // reset colourscheme
     },
 
+    onPageUnload(event) {
+        if (ContentMessages.getCurrentUploads().length > 0) {
+            return event.returnValue =
+                'You seem to be uploading files, are you sure you want to quit?';
+        }
+    },
+
+
     onKeyDown: function(ev) {
         let handled = false;
         const isMac = navigator.platform.toUpperCase().indexOf('MAC') >= 0;