/**
 * Origin on the X axis.
 */
export declare enum OriginX {
    LEFT = "left",
    CENTER = "center",
    RIGHT = "right"
}
/**
 * Origin on the Y axis.
 */
export declare enum OriginY {
    TOP = "top",
    CENTER = "center",
    BOTTOM = "bottom"
}
/**
 * A strategy for how to position an element.
 * I combines a direction and an origin for the X and Y axis.
 */
export interface IPositionStrategy {
    transformOriginX: OriginX;
    transformOriginY: OriginY;
    anchorOriginX: OriginX;
    anchorOriginY: OriginY;
}
/**
 * The position for an anchor.
 */
export interface IAnchorPosition {
    left: number;
    top: number;
}
/**
 * Transform origin.
 */
export interface ITransformOrigin {
    x: string | number;
    y: string | number;
}
/**
 * Computes the popover position.
 * @param anchorOriginX
 * @param anchorOriginY
 * @param left
 * @param top
 * @param width
 * @param height
 * @param anchorRect
 */
export declare function computeAnchorPosition({ anchorOriginX, anchorOriginY }: IPositionStrategy, { left, top, width, height }: {
    left: number;
    top: number;
    height?: number;
    width?: number;
}): IAnchorPosition;
/**
 * Computes the transform origin.
 * @param transformOriginX
 * @param transformOriginY
 */
export declare function computeTransformOrigin({ transformOriginX, transformOriginY }: IPositionStrategy): ITransformOrigin;
/**
 * Determines whether two strategies are equal.
 * @param strategyA
 * @param strategyB
 */
export declare function areStrategiesEqual(strategyA: IPositionStrategy, strategyB: IPositionStrategy): boolean;
/**
 * Computes the max dimensions of the container.
 * @param transformOriginX
 * @param transformOriginY
 * @param left
 * @param top
 */
export declare function computeMaxDimensions({ transformOriginX, transformOriginY }: IPositionStrategy, { left, top }: IAnchorPosition): {
    maxWidth: number;
    maxHeight: number;
};
/**
 * Computes a fallback strategy.
 * @param transformOriginX
 * @param transformOriginY
 * @param anchorOriginX
 * @param anchorOriginY
 * @param top
 * @param left
 * @param containerRect
 */
export declare function computeFallbackStrategy({ transformOriginX, transformOriginY, anchorOriginX, anchorOriginY }: IPositionStrategy, { top, left }: IAnchorPosition, containerRect: ClientRect | DOMRect): IPositionStrategy;