azuredatastudio/src/vs/editor/browser/config/tabFocus.ts

/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the Source EULA. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/

import { Emitter, Event } from 'vs/base/common/event';

class TabFocusImpl {
	private _tabFocus: boolean = false;

	private readonly _onDidChangeTabFocus = new Emitter<boolean>();
	public readonly onDidChangeTabFocus: Event<boolean> = this._onDidChangeTabFocus.event;

	public getTabFocusMode(): boolean {
		return this._tabFocus;
	}

	public setTabFocusMode(tabFocusMode: boolean): void {
		if (this._tabFocus === tabFocusMode) {
			return;
		}

		this._tabFocus = tabFocusMode;
		this._onDidChangeTabFocus.fire(this._tabFocus);
	}
}

/**
 * Control what pressing Tab does.
 * If it is false, pressing Tab or Shift-Tab will be handled by the editor.
 * If it is true, pressing Tab or Shift-Tab will move the browser focus.
 * Defaults to false.
 */
export const TabFocus = new TabFocusImpl();