import { Rect, Size, Viewport } from './tooltipPosition';
export type { Rect, Size, Viewport };
export interface AnchoredPlacement {
    top: number;
    left: number;
    /** Set only when `matchTriggerWidth` — the panel is pinned to the trigger width. */
    width?: number;
    placement: "bottom" | "top";
    /** Available height on the chosen side; apply as `max-height` so long lists scroll. */
    maxHeight: number;
}
export interface AnchoredOptions {
    /** Trigger↔panel offset. @default 4 */
    gap?: number;
    /** Minimum padding from the viewport edge. @default 8 */
    margin?: number;
    /** Pin the panel width to the trigger width (Select); else use the panel's own width (DatePicker). */
    matchTriggerWidth?: boolean;
    /**
     * Floor for `matchTriggerWidth` — the panel tracks the trigger but never
     * shrinks below this (DateRangePicker: its calendar + preset column stop
     * being usable under ~320px). Ignored when `matchTriggerWidth` is off.
     * The clamp below uses the SAME floored width, so a panel widened by this
     * floor is still kept inside the viewport.
     */
    minWidth?: number;
    /**
     * The panel carries its OWN CSS min-width (DateRangePicker's
     * `min-w-[fit-content]`), so it can render WIDER than the width we pin on it —
     * e.g. on `spacious` density, where `--space-8` grows the 7-cell grid, or with
     * long custom preset labels. Clamp against the measured natural width in that
     * case, or the surplus spills past the right viewport edge.
     *
     * OFF by default, and deliberately not unconditional: Select also pins its
     * panel to the trigger, but it has no min-width and truncates long option
     * labels, so its natural (max-content) width is NOT what it renders at.
     * Clamping Select against that would shove its panel left of its own trigger
     * for no reason.
     */
    clampToContentWidth?: boolean;
}
/**
 * Compute the fixed on-screen position for a dropdown panel anchored to a trigger.
 *
 * @param trigger  Bounding rect of the trigger element.
 * @param panel    Measured natural size of the panel.
 * @param viewport Viewport dimensions.
 * @param opts     gap / margin / matchTriggerWidth.
 */
export declare function computeAnchoredPosition(trigger: Rect, panel: Size, viewport: Viewport, opts?: AnchoredOptions): AnchoredPlacement;
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