Merge commit 'be3e8236086165e5e45a5a10783823874b3f3ebd' as 'lib/vscode'

lib/vscode/src/vs/editor/common/editorAction.ts

@@ -0,0 +1,46 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { IEditorAction } from 'vs/editor/common/editorCommon';
+import { IContextKeyService, ContextKeyExpression } from 'vs/platform/contextkey/common/contextkey';
+
+export class InternalEditorAction implements IEditorAction {
+
+	public readonly id: string;
+	public readonly label: string;
+	public readonly alias: string;
+
+	private readonly _precondition: ContextKeyExpression | undefined;
+	private readonly _run: () => Promise<void>;
+	private readonly _contextKeyService: IContextKeyService;
+
+	constructor(
+		id: string,
+		label: string,
+		alias: string,
+		precondition: ContextKeyExpression | undefined,
+		run: () => Promise<void>,
+		contextKeyService: IContextKeyService
+	) {
+		this.id = id;
+		this.label = label;
+		this.alias = alias;
+		this._precondition = precondition;
+		this._run = run;
+		this._contextKeyService = contextKeyService;
+	}
+
+	public isSupported(): boolean {
+		return this._contextKeyService.contextMatchesRules(this._precondition);
+	}
+
+	public run(): Promise<void> {
+		if (!this.isSupported()) {
+			return Promise.resolve(undefined);
+		}
+
+		return this._run();
+	}
+}