/**
* @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 heading/headingbuttonsui
*/
import { Plugin } from "@ckeditor/ckeditor5-core";
/**
* The `HeadingButtonsUI` plugin defines a set of UI buttons that can be used instead of the
* standard drop down component.
*
* This feature is not enabled by default by the {@link module:heading/heading~Heading} plugin and needs to be
* installed manually to the editor configuration.
*
* Plugin introduces button UI elements, which names are same as `model` property from {@link module:heading/headingconfig~HeadingOption}.
*
* ```ts
* ClassicEditor
*   .create( {
*     plugins: [ ..., Heading, Paragraph, HeadingButtonsUI, ParagraphButtonUI ]
*     heading: {
*       options: [
*         { model: 'paragraph', title: 'Paragraph', class: 'ck-heading_paragraph' },
*         { model: 'heading1', view: 'h2', title: 'Heading 1', class: 'ck-heading_heading1' },
*         { model: 'heading2', view: 'h3', title: 'Heading 2', class: 'ck-heading_heading2' },
*         { model: 'heading3', view: 'h4', title: 'Heading 3', class: 'ck-heading_heading3' }
*       ]
*      },
*      toolbar: [ 'paragraph', 'heading1', 'heading2', 'heading3' ]
*   } )
*   .then( ... )
*   .catch( ... );
* ```
*
* NOTE: The `'paragraph'` button is defined in by the {@link module:paragraph/paragraphbuttonui~ParagraphButtonUI} plugin
* which needs to be loaded manually as well.
*
* It is possible to use custom icons by providing `icon` config option in {@link module:heading/headingconfig~HeadingOption}.
* For the default configuration standard icons are used.
*/
export declare class HeadingButtonsUI extends Plugin {
	/**
	* @inheritDoc
	*/
	init(): void;
	/**
	* Creates single button view from provided configuration option.
	*/
	private _createButton;
}