import { EdgeData, NodeData } from '../types';
import { ElkNode } from 'elkjs/lib/elk.bundled';
import PCancelable from 'p-cancelable';
export declare type CanvasDirection = 'LEFT' | 'RIGHT' | 'DOWN' | 'UP';
/**
 * ELKjs layout options for the Canvas.
 *
 * Unfortunately, the ELKjs documentation is not straightforward.
 * You'll likely need to take a look at the ELK options reference to see all available options.
 *
 * @see https://github.com/kieler/elkjs#layout-options
 * @see https://www.eclipse.org/elk/reference/options.html
 */
export interface ElkCanvasLayoutOptions {
    'elk.direction'?: CanvasDirection;
    [key: string]: string;
}
/**
 * ELKjs layout option for a node.
 *
 * TODO add reference link, I don't know what are the available options.
 *
 * @see https://www.eclipse.org/elk/reference/options.html
 */
export interface ElkNodeLayoutOptions {
    [key: string]: string;
    /**
     * @example [left=12, top=12, right=12, bottom=12]
     * @see https://www.eclipse.org/elk/reference/options/org-eclipse-elk-padding.html
     */
    'elk.padding': string;
    /**
     * @see https://www.eclipse.org/elk/reference/options/org-eclipse-elk-portConstraints.html
     */
    portConstraints: 'UNDEFINED' | 'FREE' | 'FIXED_SIDE' | 'FIXED_ORDER' | 'FIXED_RATIO' | 'FIXED_POS';
}
export declare const elkLayout: (nodes: NodeData[], edges: EdgeData[], options: ElkCanvasLayoutOptions) => PCancelable<ElkNode>;