import { ElementByType, ElementType, ElementUtil, WhiteboardElement } from '../types';
export declare function getElementUtil(type: ElementType): ElementUtil<WhiteboardElement>;
export declare function setActiveLayerProvider(provider: () => string): void;
export declare function createElement<T extends ElementType>(type: T, props: Partial<ElementByType<T>>, layerId?: string): ElementByType<T>;
export interface LineEndpointInput {
    x: number;
    y: number;
    x1: number;
    y1: number;
    x2: number;
    y2: number;
    rotation: number;
    scaleX?: number;
    scaleY?: number;
}
/**
 * Compute world-space endpoints for an arrow or line element.
 *
 * The element `<g>` uses the SVG transform `translate(x,y) rotate(rotation)` together
 * with CSS `transform-box: fill-box; transform-origin: center`. In modern browsers this
 * makes the rotation pivot the fill-box center (midpoint of the local geometry) rather
 * than the local origin (0,0). We replicate that here:
 *
 *   world = translate(x,y) * rotate_around_fill_center(rotation) * scale(scaleX,scaleY)
 *
 * Fill-box center in local space: cx = (x1+x2)/2, cy = (y1+y2)/2.
 */
export declare function getLineWorldEndpoints(el: LineEndpointInput): {
    sx: number;
    sy: number;
    ex: number;
    ey: number;
};