From 739925911d7fca9fa1ccdd33759768395c889526 Mon Sep 17 00:00:00 2001
From: richard-loafle <44828666+richard-loafle@users.noreply.github.com>
Date: Thu, 6 Feb 2020 10:34:44 +0900
Subject: [PATCH] bug fixed

---
 .../src/lib/components/messages.component.html              | 2 +-
 .../src/lib/components/messages.component.ts                | 6 +++++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/projects/ucap-webmessenger-ui-chat/src/lib/components/messages.component.html b/projects/ucap-webmessenger-ui-chat/src/lib/components/messages.component.html
index 3a546c03..716ee27e 100644
--- a/projects/ucap-webmessenger-ui-chat/src/lib/components/messages.component.html
+++ b/projects/ucap-webmessenger-ui-chat/src/lib/components/messages.component.html
@@ -14,7 +14,7 @@
 >
   <div #chatMessagesContainer class="chat-messages">
     <div
-      *ngIf="eventRemained && !!eventList && eventList.length > 0"
+      *ngIf="initalized && eventRemained && !!eventList && eventList.length > 0"
       class="message-row view-previous"
     >
       <button mat-button (click)="onClickMore($event)" class="bg-accent-dark">
diff --git a/projects/ucap-webmessenger-ui-chat/src/lib/components/messages.component.ts b/projects/ucap-webmessenger-ui-chat/src/lib/components/messages.component.ts
index 6db51a32..f48c3fda 100644
--- a/projects/ucap-webmessenger-ui-chat/src/lib/components/messages.component.ts
+++ b/projects/ucap-webmessenger-ui-chat/src/lib/components/messages.component.ts
@@ -155,6 +155,7 @@ export class MessagesComponent implements OnInit, OnDestroy {
   existReadToHereEvent = true;
   hidden = false;
   swapped = false;
+  initalized = false;
 
   constructor(
     private logger: NGXLogger,
@@ -171,6 +172,7 @@ export class MessagesComponent implements OnInit, OnDestroy {
     });
     this.roomInfoSubscription = this.roomInfo$.subscribe(roomInfo => {
       this.roomInfo = roomInfo;
+      this.initalized = false;
 
       /** [S] initializing by changed room */
       // reset :: roomLastEventSeq
@@ -532,7 +534,9 @@ export class MessagesComponent implements OnInit, OnDestroy {
         this.swapScrollTo(
           this.eventList[this.eventList.length - 1],
           () => {},
-          () => {},
+          () => {
+            this.initalized = true;
+          },
           -1 === this.virtualScroller.viewPortInfo.endIndex ||
             !isInViewPortItems,
           !isInViewPortItems