/**
* @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 clipboard/dragdroptarget
*/
import { Plugin } from "@ckeditor/ckeditor5-core";
import { type ModelRange, type ModelLiveRange, type ViewElement, type ViewRange } from "@ckeditor/ckeditor5-engine";
import { delay } from "@ckeditor/ckeditor5-utils";
/**
* Part of the Drag and Drop handling. Responsible for finding and displaying the drop target.
*
* @internal
*/
export declare class DragDropTarget extends Plugin {
	/**
	* A delayed callback removing the drop marker.
	*
	* @internal
	*/
	readonly removeDropMarkerDelayed: ReturnType<typeof delay>;
	/**
	* A throttled callback updating the drop marker.
	*/
	private readonly _updateDropMarkerThrottled;
	/**
	* A throttled callback reconverting the drop parker.
	*/
	private readonly _reconvertMarkerThrottled;
	/**
	* The horizontal drop target line view.
	*/
	private _dropTargetLineView;
	/**
	* DOM Emitter.
	*/
	private _domEmitter;
	/**
	* Map of document scrollable elements.
	*/
	private _scrollables;
	/**
	* @inheritDoc
	*/
	static get pluginName(): "DragDropTarget";
	/**
	* @inheritDoc
	*/
	static override get isOfficialPlugin(): true;
	/**
	* @inheritDoc
	*/
	init(): void;
	/**
	* @inheritDoc
	*/
	override destroy(): void;
	/**
	* Finds the drop target range and updates the drop marker.
	*
	* @return The updated drop target range or null if no valid range was found.
	* @internal
	*/
	updateDropMarker(targetViewElement: ViewElement, targetViewRanges: Array<ViewRange> | null, clientX: number, clientY: number, blockMode: boolean, draggedRange: ModelLiveRange | null): ModelRange | null;
	/**
	* Finds the final drop target range.
	*
	* @internal
	*/
	getFinalDropRange(targetViewElement: ViewElement, targetViewRanges: Array<ViewRange> | null, clientX: number, clientY: number, blockMode: boolean, draggedRange: ModelLiveRange | null): ModelRange | null;
	/**
	* Removes the drop target marker.
	*
	* @internal
	*/
	removeDropMarker(): void;
	/**
	* Creates downcast conversion for the drop target marker.
	*/
	private _setupDropMarker;
	/**
	* Updates the drop target marker to the provided range.
	*
	* @param targetRange The range to set the marker to.
	*/
	private _updateDropMarker;
	/**
	* Creates the UI element for vertical (in-line) drop target.
	*/
	private _createDropTargetPosition;
	/**
	* Updates the horizontal drop target line.
	*/
	private _updateDropTargetLine;
	/**
	* Finds the closest scrollable element rect for the given view element.
	*/
	private _getScrollableRect;
}