Implement base custom editor support

.vscode/launch.json

@@ -8,7 +8,9 @@
             "request": "launch",
             "runtimeExecutable": "${execPath}",
             "args": [
-                "--extensionDevelopmentPath=${workspaceFolder}"
+                "--extensionDevelopmentPath=${workspaceFolder}",
+                "--enable-proposed-api",
+                "ms-python.python"
             ],
             "stopOnEntry": false,
             "smartStep": true,
@@ -19,7 +21,7 @@
             "preLaunchTask": "Compile",
             "skipFiles": [
                 "<node_internals>/**"
-            ]
+            ],
         },
         {
             "name": "Extension inside container",

build/ci/vscode-python-pr-validation.yaml

@@ -6,7 +6,7 @@ name: '$(Year:yyyy).$(Month).0.$(BuildID)-pr'
 pr:
   autoCancel: true
   branches:
-    include: ["master", "release*"]
+    include: ["master", "release*", "ds*"]
   paths:
     exclude: ["/news/1 Enhancements", "/news/2 Fixes", "/news/3 Code Health", "/.vscode"]
 

news/1 Enhancements/9255.md

@@ -0,0 +1 @@
+Implement VS code's custom editor for opening notebooks.

package.json

@@ -5,6 +5,7 @@
     "version": "2020.2.0-dev",
     "languageServerVersion": "0.4.114",
     "publisher": "ms-python",
+    "enableProposedApi": true,
     "author": {
         "name": "Microsoft Corporation"
     },
@@ -82,7 +83,8 @@
         "onCommand:python.datascience.exportfileasnotebook",
         "onCommand:python.datascience.exportfileandoutputasnotebook",
         "onCommand:python.datascience.selectJupyterInterpreter",
-        "onCommand:python.enableSourceMapSupport"
+        "onCommand:python.enableSourceMapSupport",
+        "onWebviewEditor:NativeEditorProvider.ipynb"
     ],
     "main": "./out/client/extension",
     "contributes": {
@@ -2767,7 +2769,18 @@
                     "when": "testsDiscovered"
                 }
             ]
-        }
+        },
+        "webviewEditors": [
+            {
+                "viewType": "NativeEditorProvider.ipynb",
+                "displayName": "Jupyter Notebook",
+                "selector": [
+                    {
+                        "filenamePattern": "*.ipynb"
+                    }
+                ]
+            }
+        ]
     },
     "scripts": {
         "package": "gulp clean && gulp prePublishBundle && vsce package -o ms-python-insiders.vsix",

src/client/common/application/commands.ts

@@ -6,7 +6,10 @@
 import { CancellationToken, Position, TextDocument, Uri } from 'vscode';
 import { Commands as LSCommands } from '../../activation/languageServer/constants';
 import { Commands as DSCommands } from '../../datascience/constants';
-import { INotebook } from '../../datascience/types';
+import { IEditCell, IInsertCell, ISwapCells } from '../../datascience/interactive-common/interactiveWindowTypes';
+import { LiveKernelModel } from '../../datascience/jupyter/kernels/types';
+import { ICell, IJupyterKernelSpec, INotebook } from '../../datascience/types';
+import { PythonInterpreter } from '../../interpreter/contracts';
 import { CommandSource } from '../../testing/common/constants';
 import { TestFunction, TestsToRun } from '../../testing/common/types';
 import { TestDataItem, TestWorkspaceFolder } from '../../testing/types';
@@ -87,6 +90,9 @@ export interface ICommandNameArgumentTypeMapping extends ICommandNameWithoutArgu
     ['python._loadLanguageServerExtension']: {}[];
     ['python.SelectAndInsertDebugConfiguration']: [TextDocument, Position, CancellationToken];
     ['python.viewLanguageServerOutput']: [];
+    ['vscode.open']: [Uri];
+    ['workbench.action.files.saveAs']: [Uri];
+    ['workbench.action.files.save']: [Uri];
     [Commands.Build_Workspace_Symbols]: [boolean, CancellationToken];
     [Commands.Sort_Imports]: [undefined, Uri];
     [Commands.Exec_In_Terminal]: [undefined, Uri];
@@ -142,4 +148,12 @@ export interface ICommandNameArgumentTypeMapping extends ICommandNameWithoutArgu
     [DSCommands.ScrollToCell]: [string, string];
     [DSCommands.ViewJupyterOutput]: [];
     [DSCommands.SwitchJupyterKernel]: [INotebook | undefined];
+    [DSCommands.NotebookStorage_DeleteAllCells]: [Uri];
+    [DSCommands.NotebookStorage_ModifyCells]: [Uri, ICell[]];
+    [DSCommands.NotebookStorage_EditCell]: [Uri, IEditCell];
+    [DSCommands.NotebookStorage_InsertCell]: [Uri, IInsertCell];
+    [DSCommands.NotebookStorage_RemoveCell]: [Uri, string];
+    [DSCommands.NotebookStorage_SwapCells]: [Uri, ISwapCells];
+    [DSCommands.NotebookStorage_ClearCellOutputs]: [Uri];
+    [DSCommands.NotebookStorage_UpdateVersion]: [Uri, PythonInterpreter | undefined, IJupyterKernelSpec | LiveKernelModel | undefined];
 }

src/client/common/application/customEditorService.ts

@@ -0,0 +1,21 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+'use strict';
+import { inject, injectable } from 'inversify';
+import * as vscode from 'vscode';
+
+import { ICommandManager, ICustomEditorService, WebviewCustomEditorProvider } from './types';
+
+@injectable()
+export class CustomEditorService implements ICustomEditorService {
+    constructor(@inject(ICommandManager) private commandManager: ICommandManager) {}
+
+    public registerWebviewCustomEditorProvider(viewType: string, provider: WebviewCustomEditorProvider, options?: vscode.WebviewPanelOptions): vscode.Disposable {
+        // tslint:disable-next-line: no-any
+        return (vscode.window as any).registerWebviewCustomEditorProvider(viewType, provider, options);
+    }
+
+    public async openEditor(file: vscode.Uri): Promise<void> {
+        await this.commandManager.executeCommand('vscode.open', file);
+    }
+}

src/client/common/application/types.ts

@@ -49,6 +49,8 @@ import {
     TreeViewOptions,
     Uri,
     ViewColumn,
+    WebviewPanel,
+    WebviewPanelOptions,
     WindowState,
     WorkspaceConfiguration,
     WorkspaceEdit,
@@ -983,6 +985,8 @@ export interface IWebPanelOptions {
     cwd: string;
     // tslint:disable-next-line: no-any
     settings?: any;
+    // Web panel to use if supplied by VS code instead
+    webViewPanel?: WebviewPanel;
 }
 
 // Wraps the VS Code api for creating a web panel
@@ -1042,3 +1046,102 @@ export const IActiveResourceService = Symbol('IActiveResourceService');
 export interface IActiveResourceService {
     getActiveResource(): Resource;
 }
+
+// Temporary hack to get the nyc compiler to find these types. vscode.proposed.d.ts doesn't work for some reason.
+/**
+ * Defines the editing functionality of a webview editor. This allows the webview editor to hook into standard
+ * editor events such as `undo` or `save`.
+ *
+ * @param EditType Type of edits. Edit objects must be json serializable.
+ */
+// tslint:disable-next-line: interface-name
+export interface WebviewCustomEditorEditingDelegate<EditType> {
+    /**
+     * Event triggered by extensions to signal to VS Code that an edit has occurred.
+     */
+    readonly onEdit: Event<{ readonly resource: Uri; readonly edit: EditType }>;
+    /**
+     * Save a resource.
+     *
+     * @param resource Resource being saved.
+     *
+     * @return Thenable signaling that the save has completed.
+     */
+    save(resource: Uri): Thenable<void>;
+
+    /**
+     * Save an existing resource at a new path.
+     *
+     * @param resource Resource being saved.
+     * @param targetResource Location to save to.
+     *
+     * @return Thenable signaling that the save has completed.
+     */
+    saveAs(resource: Uri, targetResource: Uri): Thenable<void>;
+
+    /**
+     * Apply a set of edits.
+     *
+     * Note that is not invoked when `onEdit` is called as `onEdit` implies also updating the view to reflect the edit.
+     *
+     * @param resource Resource being edited.
+     * @param edit Array of edits. Sorted from oldest to most recent.
+     *
+     * @return Thenable signaling that the change has completed.
+     */
+    applyEdits(resource: Uri, edits: readonly EditType[]): Thenable<void>;
+
+    /**
+     * Undo a set of edits.
+     *
+     * This is triggered when a user undoes an edit or when revert is called on a file.
+     *
+     * @param resource Resource being edited.
+     * @param edit Array of edits. Sorted from most recent to oldest.
+     *
+     * @return Thenable signaling that the change has completed.
+     */
+    undoEdits(resource: Uri, edits: readonly EditType[]): Thenable<void>;
+}
+
+// tslint:disable-next-line: interface-name
+export interface WebviewCustomEditorProvider {
+    /**
+     * Controls the editing functionality of a webview editor. This allows the webview editor to hook into standard
+     * editor events such as `undo` or `save`.
+     *
+     * WebviewEditors that do not have `editingCapability` are considered to be readonly. Users can still interact
+     * with readonly editors, but these editors will not integrate with VS Code's standard editor functionality.
+     */
+    readonly editingDelegate?: WebviewCustomEditorEditingDelegate<unknown>;
+    /**
+     * Resolve a webview editor for a given resource.
+     *
+     * To resolve a webview editor, a provider must fill in its initial html content and hook up all
+     * the event listeners it is interested it. The provider should also take ownership of the passed in `WebviewPanel`.
+     *
+     * @param resource Resource being resolved.
+     * @param webview Webview being resolved. The provider should take ownership of this webview.
+     *
+     * @return Thenable indicating that the webview editor has been resolved.
+     */
+    resolveWebviewEditor(resource: Uri, webview: WebviewPanel): Thenable<void>;
+}
+
+export const ICustomEditorService = Symbol('ICustomEditorService');
+export interface ICustomEditorService {
+    /**
+     * Register a new provider for webview editors of a given type.
+     *
+     * @param viewType  Type of the webview editor provider.
+     * @param provider Resolves webview editors.
+     * @param options Content settings for a webview panels the provider is given.
+     *
+     * @return Disposable that unregisters the `WebviewCustomEditorProvider`.
+     */
+    registerWebviewCustomEditorProvider(viewType: string, provider: WebviewCustomEditorProvider, options?: WebviewPanelOptions): Disposable;
+    /**
+     * Opens a file with a custom editor
+     */
+    openEditor(file: Uri): Promise<void>;
+}

src/client/common/application/webPanels/webPanel.ts

@@ -4,7 +4,7 @@
 import '../../extensions';
 
 import * as uuid from 'uuid/v4';
-import { Uri, Webview, WebviewPanel, window } from 'vscode';
+import { Uri, Webview, WebviewOptions, WebviewPanel, window } from 'vscode';
 
 import { Identifiers } from '../../../datascience/constants';
 import { InteractiveWindowMessages } from '../../../datascience/interactive-common/interactiveWindowTypes';
@@ -31,18 +31,26 @@ export class WebPanel implements IWebPanel {
         private token: string | undefined,
         private options: IWebPanelOptions
     ) {
-        this.panel = window.createWebviewPanel(
-            options.title.toLowerCase().replace(' ', ''),
-            options.title,
-            { viewColumn: options.viewColumn, preserveFocus: true },
-            {
-                enableScripts: true,
-                retainContextWhenHidden: true,
-                localResourceRoots: [Uri.file(this.options.rootPath), Uri.file(this.options.cwd)],
-                enableFindWidget: true,
-                portMapping: port ? [{ webviewPort: RemappedPort, extensionHostPort: port }] : undefined
-            }
-        );
+        const webViewOptions: WebviewOptions = {
+            enableScripts: true,
+            localResourceRoots: [Uri.file(this.options.rootPath), Uri.file(this.options.cwd)],
+            portMapping: port ? [{ webviewPort: RemappedPort, extensionHostPort: port }] : undefined
+        };
+        if (options.webViewPanel) {
+            this.panel = options.webViewPanel;
+            this.panel.webview.options = webViewOptions;
+        } else {
+            this.panel = window.createWebviewPanel(
+                options.title.toLowerCase().replace(' ', ''),
+                options.title,
+                { viewColumn: options.viewColumn, preserveFocus: true },
+                {
+                    retainContextWhenHidden: true,
+                    enableFindWidget: true,
+                    ...webViewOptions
+                }
+            );
+        }
         this.loadPromise = this.load();
     }
 

src/client/common/serviceRegistry.ts

@@ -9,6 +9,7 @@ import { IImportTracker } from '../telemetry/types';
 import { ApplicationEnvironment } from './application/applicationEnvironment';
 import { ApplicationShell } from './application/applicationShell';
 import { CommandManager } from './application/commandManager';
+import { CustomEditorService } from './application/customEditorService';
 import { DebugService } from './application/debugService';
 import { DebugSessionTelemetry } from './application/debugSessionTelemetry';
 import { DocumentManager } from './application/documentManager';
@@ -19,6 +20,7 @@ import {
     IApplicationEnvironment,
     IApplicationShell,
     ICommandManager,
+    ICustomEditorService,
     IDebugService,
     IDocumentManager,
     ILanguageService,
@@ -151,4 +153,5 @@ export function registerTypes(serviceManager: IServiceManager) {
     serviceManager.addSingleton<IExtensionChannelRule>(IExtensionChannelRule, ExtensionInsidersDailyChannelRule, ExtensionChannel.daily);
     serviceManager.addSingleton<IExtensionChannelRule>(IExtensionChannelRule, ExtensionInsidersWeeklyChannelRule, ExtensionChannel.weekly);
     serviceManager.addSingleton<IExtensionSingleActivationService>(IExtensionSingleActivationService, DebugSessionTelemetry);
+    serviceManager.addSingleton<ICustomEditorService>(ICustomEditorService, CustomEditorService);
 }

src/client/datascience/constants.ts

@@ -62,6 +62,16 @@ export namespace Commands {
     export const ScrollToCell = 'python.datascience.scrolltocell';
     export const CreateNewNotebook = 'python.datascience.createnewnotebook';
     export const ViewJupyterOutput = 'python.datascience.viewJupyterOutput';
+
+    // Make sure to put these into the package .json
+    export const NotebookStorage_DeleteAllCells = 'python.datascience.notebook.deleteall';
+    export const NotebookStorage_ModifyCells = 'python.datascience.notebook.modifycells';
+    export const NotebookStorage_EditCell = 'python.datascience.notebook.editcell';
+    export const NotebookStorage_InsertCell = 'python.datascience.notebook.insertcell';
+    export const NotebookStorage_RemoveCell = 'python.datascience.notebook.removecell';
+    export const NotebookStorage_SwapCells = 'python.datascience.notebook.swapcells';
+    export const NotebookStorage_ClearCellOutputs = 'python.datascience.notebook.clearoutputs';
+    export const NotebookStorage_UpdateVersion = 'python.datascience.notebook.updateversion';
 }
 
 export namespace CodeLensCommands {
@@ -238,7 +248,8 @@ export enum Telemetry {
     UserInstalledJupyter = 'DATASCIENCE.USER_INSTALLED_JUPYTER',
     UserDidNotInstallJupyter = 'DATASCIENCE.USER_DID_NOT_INSTALL_JUPYTER',
     OpenedInteractiveWindow = 'DATASCIENCE.OPENED_INTERACTIVE',
-    FindKernelForLocalConnection = 'DATASCIENCE.FIND_KERNEL_FOR_LOCAL_CONNECTION'
+    FindKernelForLocalConnection = 'DATASCIENCE.FIND_KERNEL_FOR_LOCAL_CONNECTION',
+    OpenNotebookFailure = 'DS_INTERNAL.NATIVE.OPEN_NOTEBOOK_FAILURE'
 }
 
 export enum NativeKeyboardCommandTelemetry {