Mark some of the metadata as transient (microsoft#13723)

Author: DonJayamanne

src/client/common/application/notebook.ts

@@ -5,6 +5,7 @@ import { inject, injectable } from 'inversify';
 import { Disposable, Event, EventEmitter } from 'vscode';
 import type {
     notebook,
+    NotebookCellMetadata,
     NotebookCellsChangeEvent as VSCNotebookCellsChangeEvent,
     NotebookContentProvider,
     NotebookDocument,
@@ -96,8 +97,15 @@ export class VSCodeNotebook implements IVSCodeNotebook {
             this.canUseNotebookApi = true;
         }
     }
-    public registerNotebookContentProvider(notebookType: string, provider: NotebookContentProvider): Disposable {
-        return this.notebook.registerNotebookContentProvider(notebookType, provider);
+    public registerNotebookContentProvider(
+        notebookType: string,
+        provider: NotebookContentProvider,
+        options?: {
+            transientOutputs: boolean;
+            transientMetadata: { [K in keyof NotebookCellMetadata]?: boolean };
+        }
+    ): Disposable {
+        return this.notebook.registerNotebookContentProvider(notebookType, provider, options);
     }
     public registerNotebookKernelProvider(
         selector: NotebookDocumentFilter,

src/client/common/application/types.ts

@@ -60,6 +60,7 @@ import {
 } from 'vscode';
 import type {
     NotebookCellLanguageChangeEvent as VSCNotebookCellLanguageChangeEvent,
+    NotebookCellMetadata,
     NotebookCellOutputsChangeEvent as VSCNotebookCellOutputsChangeEvent,
     NotebookCellsChangeEvent as VSCNotebookCellsChangeEvent,
     NotebookContentProvider,
@@ -1541,7 +1542,22 @@ export interface IVSCodeNotebook {
     readonly onDidChangeNotebookDocument: Event<NotebookCellChangedEvent>;
     readonly notebookEditors: Readonly<NotebookEditor[]>;
     readonly activeNotebookEditor: NotebookEditor | undefined;
-    registerNotebookContentProvider(notebookType: string, provider: NotebookContentProvider): Disposable;
+    registerNotebookContentProvider(
+        notebookType: string,
+        provider: NotebookContentProvider,
+        options?: {
+            /**
+             * Controls if outputs change will trigger notebook document content change and if it will be used in the diff editor
+             * Default to false. If the content provider doesn't persisit the outputs in the file document, this should be set to true.
+             */
+            transientOutputs: boolean;
+            /**
+             * Controls if a meetadata property change will trigger notebook document content change and if it will be used in the diff editor
+             * Default to false. If the content provider doesn't persisit a metadata property in the file document, it should be set to true.
+             */
+            transientMetadata: { [K in keyof NotebookCellMetadata]?: boolean };
+        }
+    ): Disposable;
 
     registerNotebookKernelProvider(selector: NotebookDocumentFilter, provider: NotebookKernelProvider): Disposable;
 }

src/client/datascience/notebook/integration.ts

@@ -56,7 +56,23 @@ export class NotebookIntegration implements IExtensionSingleActivationService {
         }
         try {
             this.disposables.push(
-                this.vscNotebook.registerNotebookContentProvider(JupyterNotebookView, this.notebookContentProvider)
+                this.vscNotebook.registerNotebookContentProvider(JupyterNotebookView, this.notebookContentProvider, {
+                    transientOutputs: false,
+                    transientMetadata: {
+                        breakpointMargin: true,
+                        editable: true,
+                        hasExecutionOrder: true,
+                        inputCollapsed: true,
+                        lastRunDuration: true,
+                        outputCollapsed: true,
+                        runStartTime: true,
+                        runnable: true,
+                        executionOrder: false,
+                        custom: false,
+                        runState: false,
+                        statusMessage: false
+                    }
+                })
             );
             this.disposables.push(
                 this.vscNotebook.registerNotebookKernelProvider(