From 96c3e4f830bfc21e7f437e32c42aa84e108ce383 Mon Sep 17 00:00:00 2001
From: Juliusz Chroboczek <jch@irif.fr>
Date: Sat, 31 Oct 2020 22:31:14 +0100
Subject: [PATCH] Add warning about screen sharing under Safari.

---
 static/sfu.js | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/static/sfu.js b/static/sfu.js
index ec9702a..741a6cb 100644
--- a/static/sfu.js
+++ b/static/sfu.js
@@ -818,6 +818,8 @@ async function addLocalMedia(id) {
     setButtonsVisibility();
 }
 
+let safariWarningDone = false;
+
 async function addShareMedia() {
     if(!getUserPass())
         return;
@@ -835,6 +837,15 @@ async function addShareMedia() {
         return;
     }
 
+    if(!safariWarningDone) {
+        let ua = navigator.userAgent.toLowerCase();
+        if(ua.indexOf('safari') >= 0 && ua.indexOf('chrome') < 0) {
+            displayWarning('Screen sharing under Safari is experimental.  ' +
+                           'Please use a different browser if possible.');
+        }
+        safariWarningDone = true;
+    }
+
     let c = newUpStream();
     c.kind = 'screenshare';
     c.stream = stream;