/*---------------------------------------------------------------------------------------------
 *  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>;
  isScreenReaderOptimized(): boolean;
  getAccessibilitySupport(): AccessibilitySupport;
}

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
);