Close old visualization tab when a new tab opens

Author: hannesbraun

src/programflow-visualization/frontend/frontend.ts

@@ -3,6 +3,8 @@ import { VisualizationPanel } from './visualization_panel';
 import { MessagePort } from 'worker_threads';
 import * as TraceCache from '../trace_cache';
 
+let panel: VisualizationPanel | undefined = undefined;
+
 export async function startFrontend(
     context: ExtensionContext,
     filePath: string,
@@ -13,7 +15,8 @@ export async function startFrontend(
         trace = await TraceCache.getTrace(context, fileHash);
     }
 
-    const panel = await VisualizationPanel.getVisualizationPanel(context, filePath, fileHash, trace, tracePort);
+    panel?.dispose();
+    panel = await VisualizationPanel.getVisualizationPanel(context, filePath, fileHash, trace, tracePort);
     if (!panel) {
         return failure("Frontend couldn't be initialized!");
     }

src/programflow-visualization/frontend/visualization_panel.ts

@@ -112,6 +112,10 @@ export class VisualizationPanel {
     });
   }
 
+  public dispose() {
+    this._panel?.dispose();
+  }
+
   public static async getVisualizationPanel(
     context: vscode.ExtensionContext,
     filePath: string,