import { Alignment, ComputedPlacement, ITourDelegate, NoElement, Orientation, Point, PopoverPosition, PopoverPositionParsed, Rect } from '@thisway/base';
import { Size, Transform } from '@thisway/utils';
import { IStepOptionsContext, RenderState } from './context';
export declare const parsePlacement: (position: PopoverPosition | PopoverPositionParsed | string | undefined) => PopoverPositionParsed;
/**
 *
 * @param orientation
 * @param stepAlignment
 * @param elementRect
 * @param popoverSize
 * @param popoverOffset - the distance from popover to element
 * @param highlightOption
 * @param viewport
 * @returns
 */
export declare const getStyleFromOrientation: (orientation: Orientation, stepAlignment: Alignment | undefined, elementRect: Rect | NoElement | undefined, popoverSize: Size, popoverOffset: number, viewport: Size, offsetX: number, offsetY: number) => {
    position: Point;
    alignment: Alignment;
};
export declare const makeComputePlacement: (delegate: ITourDelegate, stepOptionsContext: IStepOptionsContext) => ({ step }: RenderState, elementRect: Rect | NoElement | undefined, popoverSize: Size, transform: Readonly<Transform>) => ComputedPlacement | undefined;