Backport PR jupyterlab#11420 on branch 3.2.x (Makes ILabShell optional in toc extension) (jupyterlab#11421)

* Runs prettier manually

* Moves labShell parameter below translator per @jtpio, makes optional

* Makes ILabShell optional in toc extension

* Removes references to showPanel command

* Runs Prettier

Author: JasonWeill

packages/toc-extension/src/index.ts

@@ -59,12 +59,12 @@ async function activateTOC(
   app: JupyterFrontEnd,
   docmanager: IDocumentManager,
   editorTracker: IEditorTracker,
-  labShell: ILabShell,
   restorer: ILayoutRestorer,
   markdownViewerTracker: IMarkdownViewerTracker,
   notebookTracker: INotebookTracker,
   rendermime: IRenderMimeRegistry,
   translator: ITranslator,
+  labShell?: ILabShell,
   settingRegistry?: ISettingRegistry
 ): Promise<ITableOfContentsRegistry> {
   const trans = translator.load('jupyterlab');
@@ -85,7 +85,7 @@ async function activateTOC(
   toc.node.setAttribute('role', 'region');
   toc.node.setAttribute('aria-label', trans.__('Table of Contents section'));
 
-  labShell.add(toc, 'left', { rank: 400 });
+  app.shell.add(toc, 'left', { rank: 400 });
 
   app.commands.addCommand(CommandIDs.runCells, {
     execute: args => {
@@ -121,11 +121,6 @@ async function activateTOC(
     label: trans.__('Run Cell(s)')
   });
 
-  app.contextMenu.addItem({
-    selector: '.jp-tocItem',
-    command: CommandIDs.runCells
-  });
-
   // Add the ToC widget to the application restorer:
   restorer.add(toc, '@jupyterlab/toc:plugin');
 
@@ -180,7 +175,9 @@ async function activateTOC(
   registry.add(pythonGenerator);
 
   // Update the ToC when the active widget changes:
-  labShell.currentChanged.connect(onConnect);
+  if (labShell) {
+    labShell.currentChanged.connect(onConnect);
+  }
 
   return registry;
 
@@ -219,14 +216,13 @@ const extension: JupyterFrontEndPlugin<ITableOfContentsRegistry> = {
   requires: [
     IDocumentManager,
     IEditorTracker,
-    ILabShell,
     ILayoutRestorer,
     IMarkdownViewerTracker,
     INotebookTracker,
     IRenderMimeRegistry,
     ITranslator
   ],
-  optional: [ISettingRegistry],
+  optional: [ILabShell, ISettingRegistry],
   activate: activateTOC
 };