Merge commit 'be3e8236086165e5e45a5a10783823874b3f3ebd' as 'lib/vscode'

lib/vscode/src/vs/platform/accessibility/common/accessibility.ts

@@ -0,0 +1,39 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { createDecorator } from 'vs/platform/instantiation/common/instantiation';
+import { Event } from 'vs/base/common/event';
+import { RawContextKey } from 'vs/platform/contextkey/common/contextkey';
+
+export const IAccessibilityService = createDecorator<IAccessibilityService>('accessibilityService');
+
+export interface IAccessibilityService {
+	readonly _serviceBrand: undefined;
+
+	readonly onDidChangeScreenReaderOptimized: Event<void>;
+
+	alwaysUnderlineAccessKeys(): Promise<boolean>;
+	isScreenReaderOptimized(): boolean;
+	getAccessibilitySupport(): AccessibilitySupport;
+	setAccessibilitySupport(accessibilitySupport: AccessibilitySupport): void;
+}
+
+export const enum AccessibilitySupport {
+	/**
+	 * This should be the browser case where it is not known if a screen reader is attached or no.
+	 */
+	Unknown = 0,
+
+	Disabled = 1,
+
+	Enabled = 2
+}
+
+export const CONTEXT_ACCESSIBILITY_MODE_ENABLED = new RawContextKey<boolean>('accessibilityModeEnabled', false);
+
+export interface IAccessibilityInformation {
+	label: string;
+	role?: string;
+}