bugfix: Fix the NPE when focusing on the output channel (#341)

Author: jdneo

src/views/dependencyExplorer.ts

@@ -22,14 +22,19 @@ export class DependencyExplorer implements Disposable {
 
     private _dataProvider: DependencyDataProvider;
 
+    private readonly SUPPORTED_URI_SCHEMES: string[] = ["file", "jdt"];
+
     constructor(public readonly context: ExtensionContext) {
         this._dataProvider = new DependencyDataProvider(context);
         this._dependencyViewer = window.createTreeView("javaProjectExplorer", { treeDataProvider: this._dataProvider, showCollapseAll: true });
 
         context.subscriptions.push(
             window.onDidChangeActiveTextEditor((textEditor: TextEditor) => {
                 if (this._dependencyViewer.visible && textEditor && textEditor.document && Settings.syncWithFolderExplorer()) {
-                    this.reveal(textEditor.document.uri);
+                    const uri: Uri = textEditor.document.uri;
+                    if (this.SUPPORTED_URI_SCHEMES.includes(uri.scheme)) {
+                        this.reveal(uri);
+                    }
                 }
             }),
         );