From 897d01ebffe76a21e20305ecd0db53e776482b9e Mon Sep 17 00:00:00 2001
From: kangwei <bingbing.yb@alibaba-inc.com>
Date: Tue, 17 Mar 2020 18:54:30 +0800
Subject: [PATCH] fix outline on scroll

---
 .../designer/src/designer/helper/offset-observer.ts    | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/packages/designer/src/designer/helper/offset-observer.ts b/packages/designer/src/designer/helper/offset-observer.ts
index 22b47b24a..21a8175b7 100644
--- a/packages/designer/src/designer/helper/offset-observer.ts
+++ b/packages/designer/src/designer/helper/offset-observer.ts
@@ -17,14 +17,20 @@ export default class OffsetObserver {
 
   @obx hasOffset = false;
   @computed get offsetLeft() {
+    if (this.isRoot) {
+      return this.viewport.scrollX;
+    }
     if (!this.viewport.scrolling || this.lastOffsetLeft == null) {
-      this.lastOffsetLeft = this.isRoot ? this.viewport.scrollX : (this.left + this.viewport.scrollX) * this.scale;
+      this.lastOffsetLeft = (this.left + this.viewport.scrollX) * this.scale;
     }
     return this.lastOffsetLeft;
   }
   @computed get offsetTop() {
+    if (this.isRoot) {
+      return this.viewport.scrollY;
+    }
     if (!this.viewport.scrolling || this.lastOffsetTop == null) {
-      this.lastOffsetTop = this.isRoot ? this.viewport.scrollY : (this.top + this.viewport.scrollY) * this.scale;
+      this.lastOffsetTop = (this.top + this.viewport.scrollY) * this.scale;
     }
     return this.lastOffsetTop;
   }