/**
 *
 *  Copyright (c) "Neo4j"
 *  Neo4j Sweden AB [http://neo4j.com]
 *
 *  This file is part of Neo4j.
 *
 *  Neo4j is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
import { type UniqueIdentifier } from '@dnd-kit/core';
import { type RefObject } from 'react';
import { type FlattenedTreeItem, type TreeItem } from './tree-view-types';
export type SensorContext<T> = RefObject<{
    items: FlattenedTreeItem<T>[];
    offset: number;
}>;
/**
 * Takes a tree and flattens it into a list of item
 * where each item has a depth and a parentId.
 * @param tree the tree to flatten
 * @param depth the depth of the root of the tree (default 0)
 * @param parentId the id of the parent of the root of the tree (default null)
 * @returns a list of items with depth and parentId
 */
export declare const flattenTree: <T>(tree: TreeItem<T>[], depth?: number, parentId?: UniqueIdentifier | null) => FlattenedTreeItem<T>[];
/**
 * Removes the children of the items with the given ids
 * @param items the flattened tree items to remove the children from
 * @param ids the ids of the items to remove the children from
 * @returns a new list of items with the children of the items with the given ids removed
 */
export declare function removeChildrenOf<T>(items: FlattenedTreeItem<T>[], ids: UniqueIdentifier[]): FlattenedTreeItem<T>[];
/**
 * Builds a tree from a list of flattened tree items
 * @param items the flattened tree items
 * @returns the items as a tree data structure
 */
export declare function buildTree<T>(items: FlattenedTreeItem<T>[]): TreeItem<T>[];
/**
 * Calculates the new depth, max depth, min depth and parent id of the item being dragged
 * Used to project the position of the dragged item. For example, to convert the item being dragged into a placeholder.
 * such as the line that appears when dragging an item in a tree view.
 * @param items the flattened tree items
 * @param activeId the id of the item being dragged
 * @param overId the id of the item that the dragged item is being dragged over
 * @param dragOffset the offset of the drag in pixels
 * @param indentationWidth the width of the indentation in pixels
 * @returns the depth, max depth, min depth and parent id of the item being dragged
 */
export declare function getProjection<T>(items: FlattenedTreeItem<T>[], activeId: UniqueIdentifier, overId: UniqueIdentifier, dragOffset: number, indentationWidth: number): {
    depth: number;
    maxDepth: number;
    minDepth: number;
    parentId: UniqueIdentifier | null;
};
/**
 *
 * @param transform a transform object
 * @returns a css transform string
 */
export declare const transformToString: (transform: {
    scaleX: number;
    scaleY: number;
    x: number;
    y: number;
}) => string;
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