/**
 * What an edge says, kept in a module that imports nothing with a runtime of
 * its own (#587). The canvas draws with it; a host that renders the same
 * picture somewhere else, a server-side SVG Worker, imports it from
 * `yarramate/adapter/visual-graph` without taking elkjs, React or cytoscape.
 * It was first published from the editor entry (#576), which is where a
 * consumer could not use it.
 */
import { type LayoutMode } from './layout-mode.js';
/** The data fields an edge's label is decided from. */
export interface EdgeLabelData {
    readonly name?: string | null;
    readonly kindLabel?: string;
    readonly coreKindLabel?: string;
    /** An extension kind with a reading of its own (ADR 0159), else absent. */
    readonly readingKind?: string;
    /** A reading the endpoints decided (ADR 0160), else absent. */
    readonly reading?: string;
    readonly liftedCount?: number;
}
/**
 * The one place that decides what an edge says (ADR 0147).
 *
 * A named relationship says its name. An unnamed one says its reading -
 * "serves", or "served by" where the mode layers the served element above -
 * unless kind labels are off, in which case the line style and arrowhead
 * carry the kind alone. An extension kind has no reading in the table and is
 * spelled out from its own name ("deploys to" for `deploys-to`), in the active
 * voice whichever way it is layered, because nobody can conjugate a verb they
 * have not seen. A lifted edge stands for several relationships and says how
 * many.
 */
export declare const edgeLabelText: (data: EdgeLabelData, mode: LayoutMode, showKindLabels: boolean) => string;