/**
* @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 markdown-gfm/pastefrommarkdownexperimental
*/
import { Plugin, type Editor, type PluginDependenciesOf } from "@ckeditor/ckeditor5-core";
import { ClipboardPipeline } from "@ckeditor/ckeditor5-clipboard";
/**
* The GitHub Flavored Markdown (GFM) paste plugin.
*
* For a detailed overview, check the {@glink features/pasting/paste-markdown Paste Markdown feature} guide.
*/
export declare class PasteFromMarkdownExperimental extends Plugin {
	/**
	* @internal
	*/
	private _gfmDataProcessor;
	/**
	* @inheritDoc
	*/
	constructor(editor: Editor);
	/**
	* @inheritDoc
	*/
	static get pluginName(): "PasteFromMarkdownExperimental";
	/**
	* @inheritDoc
	*/
	static override get isOfficialPlugin(): true;
	/**
	* @inheritDoc
	*/
	static get requires(): PluginDependenciesOf<[ClipboardPipeline]>;
	/**
	* @inheritDoc
	*/
	init(): void;
	/**
	* Determines if the code copied from a website in the `text/html` type can be parsed as Markdown.
	* It removes any OS-specific HTML tags, for example, <meta> on macOS and <!--StartFragment--> on Windows.
	* Then removes a single wrapper HTML tag or wrappers for sibling tags, and if there are no more tags left,
	* returns the remaining text. Returns null if there are any remaining HTML tags detected.
	*
	* @param htmlString Clipboard content in the `text/html` type format.
	*/
	private _parseMarkdownFromHtml;
	/**
	* Removes OS-specific tags.
	*
	* @param htmlString Clipboard content in the `text/html` type format.
	*/
	private _removeOsSpecificTags;
	/**
	* If the input HTML string contains any first-level formatting tags
	* like <b>, <strong>, or <i>, we should not treat it as Markdown.
	*
	* @param htmlString Clipboard content.
	*/
	private _containsOnlyAllowedFirstLevelTags;
	/**
	* Removes multiple HTML wrapper tags from a list of sibling HTML tags.
	*
	* @param htmlString Clipboard content without any OS-specific tags.
	*/
	private _removeFirstLevelWrapperTagsAndBrs;
	/**
	* Determines if a string contains any HTML tags.
	*/
	private _containsAnyRemainingHtmlTags;
	/**
	* Replaces the reserved HTML entities with the actual characters.
	*
	* @param htmlString Clipboard content without any tags.
	*/
	private _replaceHtmlReservedEntitiesWithCharacters;
}