From 613569ff0977018497c492f02adbbc923fcd42b0 Mon Sep 17 00:00:00 2001
From: damencho <damencho@jitsi.org>
Date: Sat, 9 Apr 2016 12:04:01 -0500
Subject: [PATCH] Checks whether we need to modify document, before change - on
 display name change.

---
 modules/UI/side_pannels/contactlist/ContactList.js | 4 +++-
 modules/UI/videolayout/RemoteVideo.js              | 4 +++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/modules/UI/side_pannels/contactlist/ContactList.js b/modules/UI/side_pannels/contactlist/ContactList.js
index 267b78d7e..d5c23bb68 100644
--- a/modules/UI/side_pannels/contactlist/ContactList.js
+++ b/modules/UI/side_pannels/contactlist/ContactList.js
@@ -153,12 +153,14 @@ var ContactList = {
     },
 
     onDisplayNameChange (id, displayName) {
+        if(!displayName)
+            return;
         if (id === 'localVideoContainer') {
             id = APP.conference.localId;
         }
         let contactName = $(`#contacts #${id}>p`);
 
-        if (displayName) {
+        if (contactName.text() !== displayName) {
             contactName.text(displayName);
         }
     },
diff --git a/modules/UI/videolayout/RemoteVideo.js b/modules/UI/videolayout/RemoteVideo.js
index 7747ea822..32c3fd114 100644
--- a/modules/UI/videolayout/RemoteVideo.js
+++ b/modules/UI/videolayout/RemoteVideo.js
@@ -357,7 +357,9 @@ RemoteVideo.prototype.setDisplayName = function(displayName, key) {
     // If we already have a display name for this video.
     if (nameSpan.length > 0) {
         if (displayName && displayName.length > 0) {
-            $('#' + this.videoSpanId + '_name').text(displayName);
+            var displaynameSpan = $('#' + this.videoSpanId + '_name');
+            if (displaynameSpan.text() !== displayName)
+                displaynameSpan.text(displayName);
         }
         else if (key && key.length > 0) {
             var nameHtml = APP.translation.generateTranslationHTML(key);