expose vscode.notebook.onDidChangeNotebookDocument-event

src/vs/vscode.proposed.d.ts

@@ -1760,11 +1760,12 @@ declare module 'vscode' {
 
 		export function registerNotebookOutputRenderer(type: string, outputSelector: NotebookOutputSelector, renderer: NotebookOutputRenderer): Disposable;
 
+		// remove activeNotebookDocument, now that there is activeNotebookEditor.document
 		export let activeNotebookDocument: NotebookDocument | undefined;
 
 		export let activeNotebookEditor: NotebookEditor | undefined;
 
-		// export const onDidChangeNotebookDocument: Event<NotebookDocumentChangeEvent>;
+		export const onDidChangeNotebookDocument: Event<NotebookDocumentChangeEvent>;
 
 		/**
 		 * Create a document that is the concatenation of all  notebook cells. By default all code-cells are included

src/vs/workbench/api/common/extHost.api.impl.ts

@@ -917,6 +917,10 @@ export function createApiFactoryAndRegisterActors(accessor: ServicesAccessor): I
 				checkProposedApiEnabled(extension);
 				return extHostNotebook.activeNotebookEditor;
 			},
+			onDidChangeNotebookDocument(listener, thisArgs?, disposables?) {
+				checkProposedApiEnabled(extension);
+				return extHostNotebook.onDidChangeNotebookDocument(listener, thisArgs, disposables);
+			},
 			createConcatTextDocument(notebook, selector) {
 				checkProposedApiEnabled(extension);
 				return new ExtHostNotebookConcatDocument(extHostNotebook, extHostDocuments, notebook, selector);