From e33c21ee011b45af22eedc43bcfc7dc853c82e9b Mon Sep 17 00:00:00 2001
From: Rodrigo Nascimento <rodrigoknascimento@gmail.com>
Date: Tue, 8 Sep 2015 09:51:08 -0300
Subject: [PATCH] Keep scroll on load more messages

---
 client/lib/RoomHistoryManager.coffee | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/client/lib/RoomHistoryManager.coffee b/client/lib/RoomHistoryManager.coffee
index 2b3beb90695..417dba22f53 100644
--- a/client/lib/RoomHistoryManager.coffee
+++ b/client/lib/RoomHistoryManager.coffee
@@ -19,7 +19,6 @@
 
 		room.isLoading.set true
 
-		#$('.messages-box .wrapper').data('previous-height', $('.messages-box .wrapper').get(0)?.scrollHeight - $('.messages-box .wrapper').get(0)?.scrollTop)
 		# ScrollListener.setLoader true
 		lastMessage = ChatMessage.findOne({rid: rid}, {sort: {ts: 1}})
 		# lastMessage ?= ChatMessage.findOne({rid: rid}, {sort: {ts: 1}})
@@ -30,7 +29,14 @@
 			ts = new Date
 
 		Meteor.call 'loadHistory', rid, ts, limit, 0, (err, result) ->
+			wrapper = $('.messages-box .wrapper').get(0)
+			previousHeight = wrapper.scrollHeight
+
 			ChatMessage.insert item for item in result
+
+			heightDiff = wrapper.scrollHeight - previousHeight
+			wrapper.scrollTop += heightDiff
+
 			room.isLoading.set false
 			room.loaded += result.length
 			if result.length < limit