import { DiagramNode, NodeTypePreset } from './types';
/** 节点类型预设库 */
export declare const NODE_PRESETS: NodeTypePreset[];
/** 默认画布配置 */
export declare const DEFAULT_CANVAS: {
    zoom: number;
    panX: number;
    panY: number;
    showGrid: boolean;
    gridSize: number;
    snap: boolean;
    snapThreshold: number;
    backgroundColor: string;
    width: number;
    height: number;
};
/** 创建节点 */
export declare const createNode: (preset: NodeTypePreset, x: number, y: number) => DiagramNode;
/** 预设分类列表 */
export declare const PRESET_CATEGORIES: string[];
/** 默认边样式 */
export declare const DEFAULT_EDGE_STYLE: {
    stroke: string;
    strokeWidth: number;
    lineStyle: "solid";
    textColor: string;
    fontSize: number;
    sourceArrow: "none";
    targetArrow: "standard";
};
/** 形状 SVG path 生成 */
export declare const getShapePath: (shape: string, x: number, y: number, w: number, h: number) => string;
/** 计算端口坐标 */
export declare const getPortPosition: (node: DiagramNode, portId: string) => {
    x: number;
    y: number;
};
/** 计算节点中心点 */
export declare const getNodeCenter: (node: DiagramNode) => {
    x: number;
    y: number;
};
/** 历史最大长度 */
export declare const MAX_HISTORY = 50;