bug of search is fixed

projects/ucap-webmessenger-ui-chat/src/lib/components/messages.component.ts

@@ -425,6 +425,7 @@ export class MessagesComponent implements OnInit, OnDestroy {
     useSwap: boolean,
     addtionalOffset?: number
   ) {
+    if (!!to) {
       this.preSwapScroll(useHide, useSwap);
       if (!!preCallback) {
         preCallback();
@@ -448,6 +449,15 @@ export class MessagesComponent implements OnInit, OnDestroy {
           });
         }
       );
+    } else {
+      if (!!preCallback) {
+        preCallback();
+      }
+
+      if (!!postCallback) {
+        postCallback();
+      }
+    }
   }
 
   preSwapScroll(useHide: boolean, useSwap: boolean) {
@@ -526,6 +536,10 @@ export class MessagesComponent implements OnInit, OnDestroy {
           false
         );
       } else {
+        if (!this.eventList || 0 === this.eventList.length) {
+          return;
+        }
+
         const lastEvent =
           !!this.eventList && 0 < this.eventList.length
             ? this.eventList[this.eventList.length - 1]
@@ -536,7 +550,9 @@ export class MessagesComponent implements OnInit, OnDestroy {
         }
         const isInViewPortItems = this.isInViewPortItems(lastEvent.seq);
         this.swapScrollTo(
-          this.eventList[this.eventList.length - 1],
+          !!this.gotoEventSeq
+            ? undefined
+            : this.eventList[this.eventList.length - 1],
           () => {},
           () => {
             this.initalized = true;
@@ -547,7 +563,7 @@ export class MessagesComponent implements OnInit, OnDestroy {
           },
           -1 === this.virtualScroller.viewPortInfo.endIndex ||
             !isInViewPortItems,
-          !isInViewPortItems
+          !isInViewPortItems || !!this.gotoEventSeq
         );
       }
     }