import { immerable } from 'immer';
import EventEmitter3 from 'eventemitter3';
import type { ElementIdentifier, Graph } from '..';
import { AbstractEdge, EdgeData, LayoutEdgeData } from '../types';
export declare class Edge implements AbstractEdge {
    [immerable]: boolean;
    id: ElementIdentifier;
    graph: Graph;
    eventEmitter: EventEmitter3;
    source: AbstractEdge['source'];
    target: AbstractEdge['target'];
    label: AbstractEdge['label'];
    edgeStyle: EdgeData['edgeStyle'];
    renderKey: number;
    undirected: boolean;
    states: string[];
    strokeWidth: NonNullable<EdgeData['strokeWidth']>;
    color?: EdgeData['color'];
    style?: EdgeData['style'];
    element?: HTMLElement | SVGElement;
    type?: AbstractEdge['type'];
    data: EdgeData;
    mergedEdges?: EdgeData[];
    constructor(graph: Graph, edgeData: EdgeData);
    /**
     * 是否为边
     *
     * @param edge
     */
    static isEdge: (edge: ElementIdentifier | Edge) => edge is Edge;
    /**
     * 起始节点
     */
    get sourceNode(): import("./node").Node | undefined;
    /**
     * 目标节点
     */
    get targetNode(): import("./node").Node | undefined;
    /**
     * 获取路径
     */
    getPath(): {
        d: string;
        textPoint: {
            x: number;
            y: number;
        };
        textTransform: string;
    };
    /**
     * 设置边元素
     *
     * @param element
     */
    setElement(element: HTMLElement | SVGElement): void;
    /**
     * 获取布局数据
     */
    toLayoutData(): LayoutEdgeData;
    /**
     * 设置状态列表
     *
     * @param states
     */
    setStates(states: string[]): void;
    /**
     * 设置单个状态
     *
     * @param state
     * @param enable
     */
    setState(state: string, enable?: boolean): void;
    /**
     * 取消状态
     *
     * @param states
     */
    clearStates(states?: string | string[]): void;
    /**
     * 是否包含指定状态
     *
     * @param state
     * @returns
     */
    hasState(state: string): boolean;
    /**
     * 切换状态
     *
     * @param state
     */
    toggleState(state: string): void;
    /**
     * 独占某个状态
     *
     * @state 状态
     * @list 其他需要同状态的节点, 为空时则表示当前元素独占该状态
     */
    exclusiveState(state: string, list?: ElementIdentifier[]): void;
    /**
     * 派发位置更新事件
     */
    emitPositionUpdate: () => void;
    /**
     * 更新事件
     */
    onPositionUpdate: (callback: () => void) => () => void;
}
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