/**
 * @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
 */
import { type EditingView } from './view.js';
/**
 * Non-breaking space filler creator. This function creates the ` ` text node.
 * It defines how the filler is created.
 *
 * @see module:engine/view/filler~MARKED_NBSP_FILLER
 * @see module:engine/view/filler~BR_FILLER
 * @internal
 */
export declare const NBSP_FILLER: (domDocument: Document) => Text;
/**
 * Marked non-breaking space filler creator. This function creates the `<span data-cke-filler="true">&nbsp;</span>` element.
 * It defines how the filler is created.
 *
 * @see module:engine/view/filler~NBSP_FILLER
 * @see module:engine/view/filler~BR_FILLER
 * @internal
 */
export declare const MARKED_NBSP_FILLER: (domDocument: Document) => HTMLSpanElement;
/**
 * `<br>` filler creator. This function creates the `<br data-cke-filler="true">` element.
 * It defines how the filler is created.
 *
 * @see module:engine/view/filler~NBSP_FILLER
 * @see module:engine/view/filler~MARKED_NBSP_FILLER
 * @internal
 */
export declare const BR_FILLER: (domDocument: Document) => HTMLBRElement;
/**
 * Length of the {@link module:engine/view/filler~INLINE_FILLER INLINE_FILLER}.
 *
 * @internal
 */
export declare const INLINE_FILLER_LENGTH = 7;
/**
 * Inline filler which is a sequence of the word joiners.
 *
 * @internal
 */
export declare const INLINE_FILLER: string;
/**
 * Checks if the node is a text node which starts with the {@link module:engine/view/filler~INLINE_FILLER inline filler}.
 *
 * ```ts
 * startsWithFiller( document.createTextNode( INLINE_FILLER ) ); // true
 * startsWithFiller( document.createTextNode( INLINE_FILLER + 'foo' ) ); // true
 * startsWithFiller( document.createTextNode( 'foo' ) ); // false
 * startsWithFiller( document.createElement( 'p' ) ); // false
 * ```
 *
 * @param domNode DOM node.
 * @returns True if the text node starts with the {@link module:engine/view/filler~INLINE_FILLER inline filler}.
 * @internal
 */
export declare function startsWithFiller(domNode: Node | string): boolean;
/**
 * Checks if the text node contains only the {@link module:engine/view/filler~INLINE_FILLER inline filler}.
 *
 * ```ts
 * isInlineFiller( document.createTextNode( INLINE_FILLER ) ); // true
 * isInlineFiller( document.createTextNode( INLINE_FILLER + 'foo' ) ); // false
 * ```
 *
 * @param domText DOM text node.
 * @returns True if the text node contains only the {@link module:engine/view/filler~INLINE_FILLER inline filler}.
 * @internal
 */
export declare function isInlineFiller(domText: Text): boolean;
/**
 * Get string data from the text node, removing an {@link module:engine/view/filler~INLINE_FILLER inline filler} from it,
 * if text node contains it.
 *
 * ```ts
 * getDataWithoutFiller( document.createTextNode( INLINE_FILLER + 'foo' ) ) == 'foo' // true
 * getDataWithoutFiller( document.createTextNode( 'foo' ) ) == 'foo' // true
 * ```
 *
 * @param domText DOM text node, possible with inline filler.
 * @returns Data without filler.
 * @internal
 */
export declare function getDataWithoutFiller(domText: Text | string): string;
/**
 * Assign key observer which move cursor from the end of the inline filler to the beginning of it when
 * the left arrow is pressed, so the filler does not break navigation.
 *
 * @param view View controller instance we should inject quirks handling on.
 * @internal
 */
export declare function injectQuirksHandling(view: EditingView): void;