import { SparkChartPadding, SparkSeries } from './types';
export declare const DEFAULT_CHART_PADDING: SparkChartPadding;
export interface ProjectedPoint {
    x: number;
    y: number;
}
export interface ProjectionBox {
    width: number;
    height: number;
    padding: SparkChartPadding;
}
export declare function resolvePadding(padding?: Partial<SparkChartPadding>): SparkChartPadding;
export declare function clamp(value: number, min: number, max: number): number;
/**
 * Fits every series into one shared value range. A flat series is padded by ±1
 * so it draws through the middle instead of collapsing onto an edge.
 */
export declare function resolveValueDomain(series: SparkSeries[], explicit?: [number, number]): [number, number];
/**
 * Shared time range. A zero span (single sample, or every sample stamped alike)
 * returns a collapsed range and callers fall back to index spacing.
 */
export declare function resolveTimeDomain(series: SparkSeries[]): [number, number];
export declare function projectSeries(series: SparkSeries, box: ProjectionBox, timeDomain: [number, number], valueDomain: [number, number]): ProjectedPoint[];
/** Pointer progress (0–1 across the stage) to the nearest sample index. */
export declare function indexFromRatio(ratio: number, pointCount: number): number;
/** Sample index back to progress, for placing the cursor line. */
export declare function ratioFromIndex(index: number, pointCount: number): number;
/** Horizontal gutters the samples are inset by — the axis labels live here. */
export interface PlotInset {
    left: number;
    right: number;
}
/**
 * Pointer x to the nearest sample. Samples span the **plot box**, not the
 * stage: mapping the raw stage ratio drifts away from the drawn points by
 * whatever the y-axis gutter is, so the crosshair stops sitting on its sample.
 */
export declare function indexFromPointerX(clientX: number, rect: {
    left: number;
    width: number;
}, pointCount: number, inset: PlotInset): number;
/** Sample index to its x inside the plot box, in stage pixels. */
export declare function plotX(index: number, pointCount: number, inset: PlotInset, stageWidth: number): number;
/**
 * Keeps the tooltip's centre inside the stage. The box is centred on the
 * cursor, so only the outer half-width at each end can overhang — clamping in
 * pixels lets it travel as far as the stage physically allows, where a fixed
 * percentage band freezes it over the outer third of a wide card.
 */
export declare function clampAnchorCenter(center: number, halfWidth: number, stageWidth: number, margin?: number): number;