import { type Vec2, type Vec4 } from '../../math';
import type { DecorationScene, DecorationSolution, ReferenceAnnotationBaseline, ReferenceAnnotationCandidate, ReferenceAnnotationTextAnchor } from './decorations';
import type { Rect } from './layout';
import type { AxisKey, RefLine, RefLineAnnotation, RefLineValue } from './types';
export type IndexedRefLine = RefLine & {
    idx: number;
};
type Scale = (val: number) => number;
export type ReferenceLineAxes = {
    ranges: Record<AxisKey, Vec2>;
    scales: Record<AxisKey, Scale>;
};
export type RefLineAxes = {
    x_min: number;
    x_max: number;
    y_min: number;
    y_max: number;
    x_scale: Scale;
    y_scale: Scale;
};
export declare const index_ref_lines: (ref_lines: RefLine[] | undefined) => IndexedRefLine[];
export declare function resolve_ref_line_axes(line: RefLine, { ranges, scales }: ReferenceLineAxes): RefLineAxes;
export declare function normalize_value(value: RefLineValue): number;
export declare const normalize_point: (point: [RefLineValue, RefLineValue]) => Vec2;
export declare function resolve_line_endpoints(ref_line: RefLine, axes: RefLineAxes): Vec4 | null;
interface AnnotationPosition {
    x: number;
    y: number;
    text_anchor: ReferenceAnnotationTextAnchor;
    dominant_baseline: ReferenceAnnotationBaseline;
    rotation?: number;
}
export declare function calculate_annotation_position(x1: number, y1: number, x2: number, y2: number, annotation: {
    position?: `start` | `center` | `end`;
    side?: `above` | `below` | `left` | `right`;
    offset?: {
        x?: number;
        y?: number;
    };
    gap?: number;
    edge_padding?: number;
    rotate?: boolean;
}): AnnotationPosition;
interface ReferenceAnnotationMetrics {
    text_width: number;
    font_size: number;
    text_ascent: number;
    text_descent: number;
    padding: number;
}
export declare const estimate_reference_annotation_metrics: (annotation: RefLineAnnotation) => ReferenceAnnotationMetrics;
export declare const reference_annotation_text_rect: (anchor: AnnotationPosition, metrics: ReferenceAnnotationMetrics) => Rect;
export declare function create_reference_annotation_candidates(endpoints: Vec4, annotation: RefLineAnnotation, metrics?: ReferenceAnnotationMetrics): ReferenceAnnotationCandidate[];
export declare function solve_reference_annotations({ base_solution, exclusion_rects, lines, ranges, scales, clearance, ...scene }: Omit<DecorationScene, `items`> & ReferenceLineAxes & {
    base_solution: DecorationSolution;
    lines: readonly IndexedRefLine[];
    clearance?: number;
}): DecorationSolution;
export declare const get_reference_annotation_placement: (solution: DecorationSolution, line_idx: number) => ReferenceAnnotationCandidate | undefined;
export {};