import type { SankeyData, SankeyOptions, SankeyLinkDatum, SankeyNodeDatum, SankeyLinkElement, SankeyNodeElement, HierarchyNodeDatum } from './interface';
export declare class SankeyLayout {
    private options;
    private _getNodeKey?;
    private _alignFunc;
    private _maxDepth;
    private _gapY;
    private _viewBox;
    private _nodeMap;
    private _isHierarchic?;
    private _logger;
    static defaultOptions: Partial<SankeyOptions>;
    constructor(options?: SankeyOptions);
    layout(data: SankeyData, config: {
        x0: number;
        x1: number;
        y0: number;
        y1: number;
    } | {
        width: number;
        height: number;
    }): {
        nodes: SankeyNodeElement[];
        links: SankeyLinkElement[];
        columns: SankeyNodeElement[][];
    };
    computeHierarchicNodeLinks(originalNodes: HierarchyNodeDatum[]): {
        nodes: SankeyNodeElement[];
        links: SankeyLinkElement[];
        nodeMap: Record<string | number, SankeyNodeElement>;
    };
    computeSourceTargetNodeLinks(data: {
        nodes?: SankeyNodeDatum[];
        links: SankeyLinkDatum[];
    }): {
        nodeMap: Record<string | number, SankeyNodeElement>;
        nodes: SankeyNodeElement[];
        links: SankeyLinkElement[];
    };
    computeNodeLinks(data: SankeyData): {
        nodes: SankeyNodeElement[];
        links: SankeyLinkElement[];
        nodeMap: Record<string | number, SankeyNodeElement>;
    };
    computeNodeValues(nodes: SankeyNodeElement[]): void;
    computeNodeDepths(nodes: SankeyNodeElement[]): void;
    computeNodeEndDepths(nodes: SankeyNodeElement[]): void;
    computeNodeLayers(nodes: SankeyNodeElement[]): SankeyNodeElement[][];
    initializeNodeBreadths(columns: SankeyNodeElement[][]): void;
    computeNodeBreadths(nodes: SankeyNodeElement[]): SankeyNodeElement[][];
    relaxLeftToRight(columns: SankeyNodeElement[][], alpha: number, beta: number): void;
    relaxRightToLeft(columns: SankeyNodeElement[][], alpha: number, beta: number): void;
    resolveCollisions(nodes: SankeyNodeElement[], alpha: number): void;
    resolveCollisionsTopToBottom(nodes: SankeyNodeElement[], y: number, i: number, alpha: number): void;
    resolveCollisionsBottomToTop(nodes: SankeyNodeElement[], y: number, i: number, alpha: number): void;
    targetTop(source: SankeyNodeElement, target: SankeyNodeElement): number;
    sourceTop(source: SankeyNodeElement, target: SankeyNodeElement): number;
    computeLinkBreadthsNoOverlap(nodes: SankeyNodeElement[]): void;
    computeLinkBreadthsOverlap(nodes: SankeyNodeElement[]): void;
    computeLinkBreadths(nodes: SankeyNodeElement[]): void;
    reorderNodeLinks(node: SankeyNodeElement): void;
    reorderLinks(nodes: SankeyNodeElement[]): void;
    private _ascendingSourceBreadth;
    private _ascendingTargetBreadth;
}