From 9e79ecddf858d5eeb57b4ab18653b26029e2b1df Mon Sep 17 00:00:00 2001
From: lilia <liliakai@gmail.com>
Date: Thu, 27 Aug 2015 16:25:33 -0700
Subject: [PATCH] Fix scroll stickiness while hidden

Fix bug: Open thread A, open thread B, receive message in thread A, open
thread A. Scroll bar has reset to the top.
---
 js/views/message_list_view.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/js/views/message_list_view.js b/js/views/message_list_view.js
index 86006336..89d77f2f 100644
--- a/js/views/message_list_view.js
+++ b/js/views/message_list_view.js
@@ -32,6 +32,9 @@
             this.scrollToBottom();
         },
         measureScrollPosition: function() {
+            if (this.el.scrollHeight === 0) { // hidden
+                return;
+            }
             this.scrollPosition = this.$el.scrollTop() + this.$el.outerHeight();
             this.scrollHeight = this.el.scrollHeight;
             this.shouldStickToBottom = this.scrollPosition === this.scrollHeight;