import type { SankeyLayoutLink, SankeyLayoutModel, SankeyLayoutNode } from '../types/sankey-internal.js';
import type { SankeyShape } from '../types/sankey-shape.js';
/**
 * The set of nodes and links that should be visually emphasized in the active
 * interaction state. All other nodes and links are dimmed.
 */
export interface ActiveConnectedSet {
    nodes: SankeyLayoutNode[];
    links: SankeyLayoutLink[];
}
/**
 * Resolves the active visual connected set from the current click-selection and
 * hover state, applying click-over-hover precedence.
 *
 * Click selection always takes visual precedence: when `selected` is defined
 * and its identity resolves in the current `layout`, `hovered` is ignored for
 * visual rendering purposes. When the selected identity is no longer present
 * (data changed), the function falls through to hover state so the pointer can
 * recover visually without requiring an explicit deselect. With neither
 * interaction it returns `undefined` (no dimming).
 *
 * Both `selected` and `hovered` carry only stable ids (not layout-object
 * references) so this function always reads from the current layout, never
 * stale geometry.
 */
export declare function getActiveConnectedSet(layout: SankeyLayoutModel, selected: SankeyShape | undefined, hovered: SankeyShape | undefined): ActiveConnectedSet | undefined;
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