/**
* @license Copyright (c) 2003-2026, CKSource Holding sp. z o.o. All rights reserved.
* For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-licensing-options
*/
/**
* @module engine/view/observer/tabobserver
*/
import { type EditingView } from "../view.js";
import { Observer } from "./observer.js";
import type { ViewDocumentKeyEventData } from "./keyobserver.js";
import type { BubblingEvent } from "./bubblingemittermixin.js";
/**
* Tab observer introduces the {@link module:engine/view/document~ViewDocument#event:tab `Document#tab`} event.
*
* Note that because {@link module:engine/view/observer/tabobserver~TabObserver} is attached by the
* {@link module:engine/view/view~EditingView}, this event is available by default.
*/
export declare class TabObserver extends Observer {
	/**
	* @inheritDoc
	*/
	constructor(view: EditingView);
	/**
	* @inheritDoc
	*/
	override observe(): void;
	/**
	* @inheritDoc
	*/
	override stopObserving(): void;
}
/**
* Event fired when the user presses a tab key.
*
* Introduced by {@link module:engine/view/observer/tabobserver~TabObserver}.
*
* Note that because {@link module:engine/view/observer/tabobserver~TabObserver} is attached by the
* {@link module:engine/view/view~EditingView}, this event is available by default.
*
* @eventName module:engine/view/document~ViewDocument#tab
* @param data
*/
export type ViewDocumentTabEvent = BubblingEvent<{
	name: "tab";
	args: [data: ViewDocumentKeyEventData];
}>;