/** A corner/center alignment pair, independent of any specific composable. */
export type GeometryAlign = {
    horizontal: "left" | "center" | "right";
    vertical: "top" | "center" | "bottom";
};
/** A rectangular clipping region (viewport or a scrollable container's rect). */
export type GeometryBounds = {
    left: number;
    top: number;
    right: number;
    bottom: number;
};
export type GeometryCollisionType = "fit" | "flip";
export type GeometryCollision = {
    horizontal: GeometryCollisionType;
    vertical: GeometryCollisionType;
};
export type ComputeCollisionOffsetInput = {
    /** The anchor rect (or a zero-size point rect for a click/keyboard activation). */
    anchor: DOMRect;
    /** The popup's own measured size, or `null` before it has been measured. */
    popup: DOMRect | null;
    /** Point on the anchor that the popup is positioned from. */
    anchorAlign: GeometryAlign;
    /** Point on the popup that is placed at the computed anchor point. */
    popupAlign: GeometryAlign;
    /** Clipping bounds checked for overflow; same coordinate space as `anchor`. */
    bounds: GeometryBounds;
    /** Per-axis collision behavior applied when the preferred corner overflows. */
    collision: GeometryCollision;
};
/**
 * Computes a popup's top-left corner from an anchor rect and alignment pair,
 * then applies Kendo-style `fit` or `flip` collision behavior independently
 * on each axis. Fit shifts the popup within bounds without changing sides;
 * flip moves it to the anchor's opposite side only when that reduces overflow.
 *
 * Returns the preferred position when `popup` is `null`, since collision
 * behavior cannot be calculated before the popup has been measured.
 */
export declare const computeCollisionOffset: ({ anchor, popup, anchorAlign, popupAlign, bounds, collision, }: ComputeCollisionOffsetInput) => {
    left: number;
    top: number;
};