From df57fc6327741aa7c44011d354e1ddee7c8ab233 Mon Sep 17 00:00:00 2001
From: Nicholas Bollweg <nick.bollweg@gmail.com>
Date: Mon, 18 May 2020 20:50:16 -0400
Subject: [PATCH] don't reinitialize url after every show

---
 src/editor.ts | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/editor.ts b/src/editor.ts
index 544749c..126dc79 100644
--- a/src/editor.ts
+++ b/src/editor.ts
@@ -145,11 +145,15 @@ export class DrawioWidget extends DocumentWidget<IFrame> {
   }
 
   onAfterShow(msg: Message): void {
+    const url = this.drawioUrl();
+    if (this.content.url == url) {
+      return;
+    }
     this._frame = this.content.node.querySelector(
       "iframe"
     ) as HTMLIFrameElement;
     window.addEventListener("message", (evt) => this.handleMessageEvent(evt));
-    this.content.url = this.drawioUrl();
+    this.content.url = url;
   }
 
   private _onContextReady(): void {