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extHostNotebookKernels.ts
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extHostNotebookKernels.ts
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/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
import { asArray } from 'vs/base/common/arrays';
import { DeferredPromise, timeout } from 'vs/base/common/async';
import { CancellationTokenSource } from 'vs/base/common/cancellation';
import { Emitter } from 'vs/base/common/event';
import { Disposable, DisposableStore } from 'vs/base/common/lifecycle';
import { ResourceMap } from 'vs/base/common/map';
import { URI, UriComponents } from 'vs/base/common/uri';
import { ExtensionIdentifier, IExtensionDescription } from 'vs/platform/extensions/common/extensions';
import { ILogService } from 'vs/platform/log/common/log';
import { ExtHostNotebookKernelsShape, ICellExecuteUpdateDto, IMainContext, INotebookKernelDto2, MainContext, MainThreadNotebookKernelsShape, NotebookOutputDto } from 'vs/workbench/api/common/extHost.protocol';
import { ApiCommand, ApiCommandArgument, ApiCommandResult, ExtHostCommands } from 'vs/workbench/api/common/extHostCommands';
import { IExtHostInitDataService } from 'vs/workbench/api/common/extHostInitDataService';
import { ExtHostNotebookController } from 'vs/workbench/api/common/extHostNotebook';
import { ExtHostCell } from 'vs/workbench/api/common/extHostNotebookDocument';
import * as extHostTypeConverters from 'vs/workbench/api/common/extHostTypeConverters';
import { NotebookCellExecutionState as ExtHostNotebookCellExecutionState, NotebookCellOutput } from 'vs/workbench/api/common/extHostTypes';
import { asWebviewUri } from 'vs/workbench/common/webview';
import { NotebookCellExecutionState } from 'vs/workbench/contrib/notebook/common/notebookCommon';
import { CellExecutionUpdateType } from 'vs/workbench/contrib/notebook/common/notebookExecutionService';
import { checkProposedApiEnabled } from 'vs/workbench/services/extensions/common/extensions';
import { SerializableObjectWithBuffers } from 'vs/workbench/services/extensions/common/proxyIdentifier';
import * as vscode from 'vscode';
interface IKernelData {
extensionId: ExtensionIdentifier;
controller: vscode.NotebookController;
onDidChangeSelection: Emitter<{ selected: boolean; notebook: vscode.NotebookDocument }>;
onDidReceiveMessage: Emitter<{ editor: vscode.NotebookEditor; message: any }>;
associatedNotebooks: ResourceMap<boolean>;
}
type ExtHostSelectKernelArgs = ControllerInfo | { notebookEditor: vscode.NotebookEditor } | ControllerInfo & { notebookEditor: vscode.NotebookEditor } | undefined;
export type SelectKernelReturnArgs = ControllerInfo | { notebookEditorId: string } | ControllerInfo & { notebookEditorId: string } | undefined;
type ControllerInfo = { id: string; extension: string };
export class ExtHostNotebookKernels implements ExtHostNotebookKernelsShape {
private readonly _proxy: MainThreadNotebookKernelsShape;
private readonly _activeExecutions = new ResourceMap<NotebookCellExecutionTask>();
private readonly _kernelData = new Map<number, IKernelData>();
private _handlePool: number = 0;
private readonly _onDidChangeCellExecutionState = new Emitter<vscode.NotebookCellExecutionStateChangeEvent>();
readonly onDidChangeNotebookCellExecutionState = this._onDidChangeCellExecutionState.event;
constructor(
mainContext: IMainContext,
private readonly _initData: IExtHostInitDataService,
private readonly _extHostNotebook: ExtHostNotebookController,
private _commands: ExtHostCommands,
@ILogService private readonly _logService: ILogService,
) {
this._proxy = mainContext.getProxy(MainContext.MainThreadNotebookKernels);
// todo@rebornix @joyceerhl: move to APICommands once stabilized.
const selectKernelApiCommand = new ApiCommand(
'notebook.selectKernel',
'_notebook.selectKernel',
'Trigger kernel picker for specified notebook editor widget',
[
new ApiCommandArgument<ExtHostSelectKernelArgs, SelectKernelReturnArgs>('options', 'Select kernel options', v => true, (v: ExtHostSelectKernelArgs) => {
if (v && 'notebookEditor' in v && 'id' in v) {
const notebookEditorId = this._extHostNotebook.getIdByEditor(v.notebookEditor);
return {
id: v.id, extension: v.extension, notebookEditorId
};
} else if (v && 'notebookEditor' in v) {
const notebookEditorId = this._extHostNotebook.getIdByEditor(v.notebookEditor);
if (notebookEditorId === undefined) {
throw new Error(`Cannot invoke 'notebook.selectKernel' for unrecognized notebook editor ${v.notebookEditor.document.uri.toString()}`);
}
return { notebookEditorId };
}
return v;
})
],
ApiCommandResult.Void);
this._commands.registerApiCommand(selectKernelApiCommand);
}
createNotebookController(extension: IExtensionDescription, id: string, viewType: string, label: string, handler?: (cells: vscode.NotebookCell[], notebook: vscode.NotebookDocument, controller: vscode.NotebookController) => void | Thenable<void>, preloads?: vscode.NotebookRendererScript[]): vscode.NotebookController {
for (const data of this._kernelData.values()) {
if (data.controller.id === id && ExtensionIdentifier.equals(extension.identifier, data.extensionId)) {
throw new Error(`notebook controller with id '${id}' ALREADY exist`);
}
}
const handle = this._handlePool++;
const that = this;
this._logService.trace(`NotebookController[${handle}], CREATED by ${extension.identifier.value}, ${id}`);
const _defaultExecutHandler = () => console.warn(`NO execute handler from notebook controller '${data.id}' of extension: '${extension.identifier}'`);
let isDisposed = false;
const commandDisposables = new DisposableStore();
const onDidChangeSelection = new Emitter<{ selected: boolean; notebook: vscode.NotebookDocument }>();
const onDidReceiveMessage = new Emitter<{ editor: vscode.NotebookEditor; message: any }>();
const data: INotebookKernelDto2 = {
id: createKernelId(extension.identifier, id),
notebookType: viewType,
extensionId: extension.identifier,
extensionLocation: extension.extensionLocation,
label: label || extension.identifier.value,
preloads: preloads ? preloads.map(extHostTypeConverters.NotebookRendererScript.from) : []
};
//
let _executeHandler = handler ?? _defaultExecutHandler;
let _interruptHandler: ((this: vscode.NotebookController, notebook: vscode.NotebookDocument) => void | Thenable<void>) | undefined;
this._proxy.$addKernel(handle, data).catch(err => {
// this can happen when a kernel with that ID is already registered
console.log(err);
isDisposed = true;
});
// update: all setters write directly into the dto object
// and trigger an update. the actual update will only happen
// once per event loop execution
let tokenPool = 0;
const _update = () => {
if (isDisposed) {
return;
}
const myToken = ++tokenPool;
Promise.resolve().then(() => {
if (myToken === tokenPool) {
this._proxy.$updateKernel(handle, data);
}
});
};
// notebook documents that are associated to this controller
const associatedNotebooks = new ResourceMap<boolean>();
const controller: vscode.NotebookController = {
get id() { return id; },
get notebookType() { return data.notebookType; },
onDidChangeSelectedNotebooks: onDidChangeSelection.event,
get label() {
return data.label;
},
set label(value) {
data.label = value ?? extension.displayName ?? extension.name;
_update();
},
get detail() {
return data.detail ?? '';
},
set detail(value) {
data.detail = value;
_update();
},
get description() {
return data.description ?? '';
},
set description(value) {
data.description = value;
_update();
},
get kind() {
checkProposedApiEnabled(extension, 'notebookControllerKind');
return data.kind ?? '';
},
set kind(value) {
checkProposedApiEnabled(extension, 'notebookControllerKind');
data.kind = value;
_update();
},
get supportedLanguages() {
return data.supportedLanguages;
},
set supportedLanguages(value) {
data.supportedLanguages = value;
_update();
},
get supportsExecutionOrder() {
return data.supportsExecutionOrder ?? false;
},
set supportsExecutionOrder(value) {
data.supportsExecutionOrder = value;
_update();
},
get rendererScripts() {
return data.preloads ? data.preloads.map(extHostTypeConverters.NotebookRendererScript.to) : [];
},
get executeHandler() {
return _executeHandler;
},
set executeHandler(value) {
_executeHandler = value ?? _defaultExecutHandler;
},
get interruptHandler() {
return _interruptHandler;
},
set interruptHandler(value) {
_interruptHandler = value;
data.supportsInterrupt = Boolean(value);
_update();
},
createNotebookCellExecution(cell) {
if (isDisposed) {
throw new Error('notebook controller is DISPOSED');
}
if (!associatedNotebooks.has(cell.notebook.uri)) {
that._logService.trace(`NotebookController[${handle}] NOT associated to notebook, associated to THESE notebooks:`, Array.from(associatedNotebooks.keys()).map(u => u.toString()));
throw new Error(`notebook controller is NOT associated to notebook: ${cell.notebook.uri.toString()}`);
}
return that._createNotebookCellExecution(cell, createKernelId(extension.identifier, this.id));
},
dispose: () => {
if (!isDisposed) {
this._logService.trace(`NotebookController[${handle}], DISPOSED`);
isDisposed = true;
this._kernelData.delete(handle);
commandDisposables.dispose();
onDidChangeSelection.dispose();
onDidReceiveMessage.dispose();
this._proxy.$removeKernel(handle);
}
},
// --- priority
updateNotebookAffinity(notebook, priority) {
that._proxy.$updateNotebookPriority(handle, notebook.uri, priority);
},
// --- ipc
onDidReceiveMessage: onDidReceiveMessage.event,
postMessage(message, editor) {
checkProposedApiEnabled(extension, 'notebookMessaging');
return that._proxy.$postMessage(handle, editor && that._extHostNotebook.getIdByEditor(editor), message);
},
asWebviewUri(uri: URI) {
checkProposedApiEnabled(extension, 'notebookMessaging');
return asWebviewUri(uri, that._initData.remote);
},
};
this._kernelData.set(handle, {
extensionId: extension.identifier,
controller,
onDidReceiveMessage,
onDidChangeSelection,
associatedNotebooks
});
return controller;
}
getIdByController(controller: vscode.NotebookController) {
for (const [_, candidate] of this._kernelData) {
if (candidate.controller === controller) {
return createKernelId(candidate.extensionId, controller.id);
}
}
return null;
}
$acceptNotebookAssociation(handle: number, uri: UriComponents, value: boolean): void {
const obj = this._kernelData.get(handle);
if (obj) {
// update data structure
const notebook = this._extHostNotebook.getNotebookDocument(URI.revive(uri))!;
if (value) {
obj.associatedNotebooks.set(notebook.uri, true);
} else {
obj.associatedNotebooks.delete(notebook.uri);
}
this._logService.trace(`NotebookController[${handle}] ASSOCIATE notebook`, notebook.uri.toString(), value);
// send event
obj.onDidChangeSelection.fire({
selected: value,
notebook: notebook.apiNotebook
});
}
}
async $executeCells(handle: number, uri: UriComponents, handles: number[]): Promise<void> {
const obj = this._kernelData.get(handle);
if (!obj) {
// extension can dispose kernels in the meantime
return;
}
const document = this._extHostNotebook.getNotebookDocument(URI.revive(uri));
const cells: vscode.NotebookCell[] = [];
for (const cellHandle of handles) {
const cell = document.getCell(cellHandle);
if (cell) {
cells.push(cell.apiCell);
}
}
try {
this._logService.trace(`NotebookController[${handle}] EXECUTE cells`, document.uri.toString(), cells.length);
await obj.controller.executeHandler.call(obj.controller, cells, document.apiNotebook, obj.controller);
} catch (err) {
//
this._logService.error(`NotebookController[${handle}] execute cells FAILED`, err);
console.error(err);
}
}
async $cancelCells(handle: number, uri: UriComponents, handles: number[]): Promise<void> {
const obj = this._kernelData.get(handle);
if (!obj) {
// extension can dispose kernels in the meantime
return;
}
// cancel or interrupt depends on the controller. When an interrupt handler is used we
// don't trigger the cancelation token of executions.
const document = this._extHostNotebook.getNotebookDocument(URI.revive(uri));
if (obj.controller.interruptHandler) {
await obj.controller.interruptHandler.call(obj.controller, document.apiNotebook);
} else {
for (const cellHandle of handles) {
const cell = document.getCell(cellHandle);
if (cell) {
this._activeExecutions.get(cell.uri)?.cancel();
}
}
}
}
$acceptKernelMessageFromRenderer(handle: number, editorId: string, message: any): void {
const obj = this._kernelData.get(handle);
if (!obj) {
// extension can dispose kernels in the meantime
return;
}
const editor = this._extHostNotebook.getEditorById(editorId);
obj.onDidReceiveMessage.fire(Object.freeze({ editor: editor.apiEditor, message }));
}
$cellExecutionChanged(uri: UriComponents, cellHandle: number, state: NotebookCellExecutionState | undefined): void {
const document = this._extHostNotebook.getNotebookDocument(URI.revive(uri));
const cell = document.getCell(cellHandle);
if (cell) {
const newState = state ? extHostTypeConverters.NotebookCellExecutionState.to(state) : ExtHostNotebookCellExecutionState.Idle;
if (newState !== undefined) {
this._onDidChangeCellExecutionState.fire({
cell: cell.apiCell,
state: newState
});
}
}
}
// ---
_createNotebookCellExecution(cell: vscode.NotebookCell, controllerId: string): vscode.NotebookCellExecution {
if (cell.index < 0) {
throw new Error('CANNOT execute cell that has been REMOVED from notebook');
}
const notebook = this._extHostNotebook.getNotebookDocument(cell.notebook.uri);
const cellObj = notebook.getCellFromApiCell(cell);
if (!cellObj) {
throw new Error('invalid cell');
}
if (this._activeExecutions.has(cellObj.uri)) {
throw new Error(`duplicate execution for ${cellObj.uri}`);
}
const execution = new NotebookCellExecutionTask(controllerId, cellObj, this._proxy);
this._activeExecutions.set(cellObj.uri, execution);
const listener = execution.onDidChangeState(() => {
if (execution.state === NotebookCellExecutionTaskState.Resolved) {
execution.dispose();
listener.dispose();
this._activeExecutions.delete(cellObj.uri);
}
});
return execution.asApiObject();
}
}
enum NotebookCellExecutionTaskState {
Init,
Started,
Resolved
}
class NotebookCellExecutionTask extends Disposable {
private static HANDLE = 0;
private _handle = NotebookCellExecutionTask.HANDLE++;
private _onDidChangeState = new Emitter<void>();
readonly onDidChangeState = this._onDidChangeState.event;
private _state = NotebookCellExecutionTaskState.Init;
get state(): NotebookCellExecutionTaskState { return this._state; }
private readonly _tokenSource = this._register(new CancellationTokenSource());
private readonly _collector: TimeoutBasedCollector<ICellExecuteUpdateDto>;
private _executionOrder: number | undefined;
constructor(
controllerId: string,
private readonly _cell: ExtHostCell,
private readonly _proxy: MainThreadNotebookKernelsShape
) {
super();
this._collector = new TimeoutBasedCollector(10, updates => this.update(updates));
this._executionOrder = _cell.internalMetadata.executionOrder;
this._proxy.$createExecution(this._handle, controllerId, this._cell.notebook.uri, this._cell.handle);
}
cancel(): void {
this._tokenSource.cancel();
}
private async updateSoon(update: ICellExecuteUpdateDto): Promise<void> {
await this._collector.addItem(update);
}
private async update(update: ICellExecuteUpdateDto | ICellExecuteUpdateDto[]): Promise<void> {
const updates = Array.isArray(update) ? update : [update];
return this._proxy.$updateExecution(this._handle, new SerializableObjectWithBuffers(updates));
}
private verifyStateForOutput() {
if (this._state === NotebookCellExecutionTaskState.Init) {
throw new Error('Must call start before modifying cell output');
}
if (this._state === NotebookCellExecutionTaskState.Resolved) {
throw new Error('Cannot modify cell output after calling resolve');
}
}
private cellIndexToHandle(cellOrCellIndex: vscode.NotebookCell | undefined): number {
let cell: ExtHostCell | undefined = this._cell;
if (cellOrCellIndex) {
cell = this._cell.notebook.getCellFromApiCell(cellOrCellIndex);
}
if (!cell) {
throw new Error('INVALID cell');
}
return cell.handle;
}
private validateAndConvertOutputs(items: vscode.NotebookCellOutput[]): NotebookOutputDto[] {
return items.map(output => {
const newOutput = NotebookCellOutput.ensureUniqueMimeTypes(output.items, true);
if (newOutput === output.items) {
return extHostTypeConverters.NotebookCellOutput.from(output);
}
return extHostTypeConverters.NotebookCellOutput.from({
items: newOutput,
id: output.id,
metadata: output.metadata
});
});
}
private async updateOutputs(outputs: vscode.NotebookCellOutput | vscode.NotebookCellOutput[], cell: vscode.NotebookCell | undefined, append: boolean): Promise<void> {
const handle = this.cellIndexToHandle(cell);
const outputDtos = this.validateAndConvertOutputs(asArray(outputs));
return this.updateSoon(
{
editType: CellExecutionUpdateType.Output,
cellHandle: handle,
append,
outputs: outputDtos
});
}
private async updateOutputItems(items: vscode.NotebookCellOutputItem | vscode.NotebookCellOutputItem[], output: vscode.NotebookCellOutput, append: boolean): Promise<void> {
items = NotebookCellOutput.ensureUniqueMimeTypes(asArray(items), true);
return this.updateSoon({
editType: CellExecutionUpdateType.OutputItems,
items: items.map(extHostTypeConverters.NotebookCellOutputItem.from),
outputId: output.id,
append
});
}
asApiObject(): vscode.NotebookCellExecution {
const that = this;
const result: vscode.NotebookCellExecution = {
get token() { return that._tokenSource.token; },
get cell() { return that._cell.apiCell; },
get executionOrder() { return that._executionOrder; },
set executionOrder(v: number | undefined) {
that._executionOrder = v;
that.update([{
editType: CellExecutionUpdateType.ExecutionState,
executionOrder: that._executionOrder
}]);
},
start(startTime?: number): void {
if (that._state === NotebookCellExecutionTaskState.Resolved || that._state === NotebookCellExecutionTaskState.Started) {
throw new Error('Cannot call start again');
}
that._state = NotebookCellExecutionTaskState.Started;
that._onDidChangeState.fire();
that.update({
editType: CellExecutionUpdateType.ExecutionState,
runStartTime: startTime
});
},
end(success: boolean | undefined, endTime?: number): void {
if (that._state === NotebookCellExecutionTaskState.Resolved) {
throw new Error('Cannot call resolve twice');
}
that._state = NotebookCellExecutionTaskState.Resolved;
that._onDidChangeState.fire();
// The last update needs to be ordered correctly and applied immediately,
// so we use updateSoon and immediately flush.
that._collector.flush();
that._proxy.$completeExecution(that._handle, new SerializableObjectWithBuffers({
runEndTime: endTime,
lastRunSuccess: success
}));
},
clearOutput(cell?: vscode.NotebookCell): Thenable<void> {
that.verifyStateForOutput();
return that.updateOutputs([], cell, false);
},
appendOutput(outputs: vscode.NotebookCellOutput | vscode.NotebookCellOutput[], cell?: vscode.NotebookCell): Promise<void> {
that.verifyStateForOutput();
return that.updateOutputs(outputs, cell, true);
},
replaceOutput(outputs: vscode.NotebookCellOutput | vscode.NotebookCellOutput[], cell?: vscode.NotebookCell): Promise<void> {
that.verifyStateForOutput();
return that.updateOutputs(outputs, cell, false);
},
appendOutputItems(items: vscode.NotebookCellOutputItem | vscode.NotebookCellOutputItem[], output: vscode.NotebookCellOutput): Promise<void> {
that.verifyStateForOutput();
return that.updateOutputItems(items, output, true);
},
replaceOutputItems(items: vscode.NotebookCellOutputItem | vscode.NotebookCellOutputItem[], output: vscode.NotebookCellOutput): Promise<void> {
that.verifyStateForOutput();
return that.updateOutputItems(items, output, false);
}
};
return Object.freeze(result);
}
}
class TimeoutBasedCollector<T> {
private batch: T[] = [];
private startedTimer = Date.now();
private currentDeferred: DeferredPromise<void> | undefined;
constructor(
private readonly delay: number,
private readonly callback: (items: T[]) => Promise<void>) { }
addItem(item: T): Promise<void> {
this.batch.push(item);
if (!this.currentDeferred) {
this.currentDeferred = new DeferredPromise<void>();
this.startedTimer = Date.now();
timeout(this.delay).then(() => {
return this.flush();
});
}
// This can be called by the extension repeatedly for a long time before the timeout is able to run.
// Force a flush after the delay.
if (Date.now() - this.startedTimer > this.delay) {
return this.flush();
}
return this.currentDeferred.p;
}
flush(): Promise<void> {
if (this.batch.length === 0 || !this.currentDeferred) {
return Promise.resolve();
}
const deferred = this.currentDeferred;
this.currentDeferred = undefined;
const batch = this.batch;
this.batch = [];
return this.callback(batch)
.finally(() => deferred.complete());
}
}
export function createKernelId(extensionIdentifier: ExtensionIdentifier, id: string): string {
return `${extensionIdentifier.value}/${id}`;
}