Replace continuous cursor following with a command

lib/main/atom/views/outline/navigationTreeComponent.tsx

@@ -1,4 +1,4 @@
-import {CompositeDisposable, CursorPositionChangedEvent, Disposable, TextEditor} from "atom"
+import {CompositeDisposable, Disposable, TextEditor} from "atom"
 import * as etch from "etch"
 import {isEqual} from "lodash"
 import {NavigationTree} from "typescript/lib/protocol"
@@ -32,7 +32,10 @@ export class NavigationTreeComponent
   constructor(public props: Props) {
     prepareNavTree(props.navTree)
     etch.initialize(this)
-    this.subscriptions.add(atom.workspace.observeActiveTextEditor(this.subscribeToEditor))
+    this.subscriptions.add(
+      atom.workspace.observeActiveTextEditor(this.subscribeToEditor),
+      atom.commands.add("atom-workspace", "typescript:reveal-cursor", this.selectAtCursorLine)
+    )
   }
 
   public async update(props: Partial<Props>) {
@@ -138,11 +141,16 @@ export class NavigationTreeComponent
    * HELPER select the node's HTML represenation which corresponds to the
    *        current cursor position
    */
-  private selectAtCursorLine = ({newBufferPosition}: CursorPositionChangedEvent) => {
+  private selectAtCursorLine = () => {
+    const editor = atom.workspace.getActiveTextEditor()
+    if (editor === undefined) {
+      return
+    }
+
     if (!this.props.navTree) {
       return
     }
-    const cursorLine = newBufferPosition.row
+    const cursorLine = editor.getCursorBufferPosition().row
 
     const selectedChild = findNodeAt(cursorLine, cursorLine, this.props.navTree)
     if (selectedChild !== this.selectedNode) {
@@ -177,7 +185,6 @@ export class NavigationTreeComponent
     // set navTree
     await this.loadNavTree()
 
-    this.editorScrolling = editor.onDidChangeCursorPosition(this.selectAtCursorLine)
     this.editorChanging = editor.onDidStopChanging(this.loadNavTree)
   }
 }