notice, if there are no messages

app/css/app.css

@@ -792,6 +792,19 @@ a.im_dialog:hover .im_dialog_date {
   -webkit-user-select: text;
 }
 
+.im_history_messages_none.ng-hide {
+  display: none;
+}
+
+.im_history_messages_none {
+  display: block;
+  padding: 100px 50px 0;
+
+  text-align: center;
+  color: #999;
+  font-size: 1.5em;
+}
+
 .im_history_to_bottom {
   position: relative;
 }

app/js/controllers.js

@@ -449,6 +449,8 @@ angular.module('myApp.controllers', [])
       getMessagesPromise.then(function (historyResult) {
         if (curJump != jump) return;
 
+        historyResult.count === 0 ?  $scope.mediaEmpty = true : $scope.mediaEmpty = false;
+
         offset += startLimit;
         hasMore = offset < historyResult.count;
         maxID = historyResult.history[historyResult.history.length - 1];

app/partials/im.html

@@ -98,6 +98,7 @@
               <div class="im_history_scrollable">
 
                   <div class="im_history" ng-class="{im_history_selectable: selectActions}">
+                    <div class="im_history_messages_none" ng-show="mediaEmpty">No messages to display</div>
                     <div class="im_history_message_wrap" my-message ng-repeat="historyMessage in history"></div>
                   </div>