/**
 * Sparkline geometry. Pure functions that turn an array of numbers into the
 * SVG primitives a tiny in-cell chart needs - no DOM, so it is trivially
 * unit-testable and the `<SvGrid>` render component just paints the result.
 *
 * Four chart types, mirroring the de-facto enterprise-grid set:
 *   - `line`     a single polyline
 *   - `area`     a polyline plus a filled area down to the baseline
 *   - `bar`      one column per value, scaled from the dataset min..max
 *   - `winloss`  fixed-height up/down bars (sign only), e.g. W/L streaks
 */
export type SparklineType = 'line' | 'area' | 'bar' | 'winloss';
export type SparklineConfig = {
    type?: SparklineType;
    /** Stroke (line/area) or positive fill (bar/winloss). */
    color?: string;
    /** Fill for negative bars / losses. Defaults to a red. */
    negativeColor?: string;
    width?: number;
    height?: number;
    /** Fix the value scale instead of deriving it from the row's own data. */
    min?: number;
    max?: number;
    lineWidth?: number;
    /** Draw a dot on the last point (line/area). Default true. */
    lastPoint?: boolean;
};
export type SparklineBar = {
    x: number;
    y: number;
    w: number;
    h: number;
    negative: boolean;
};
export type SparklineGeometry = {
    width: number;
    height: number;
    type: SparklineType;
    color: string;
    negativeColor: string;
    lineWidth: number;
    /** `line` / `area`: the polyline through every point. */
    linePath: string;
    /** `area`: closed path filled down to the baseline. */
    areaPath: string;
    /** `bar` / `winloss`: one rect per value. */
    bars: SparklineBar[];
    /** `line` / `area`: the final point, for the end-cap dot. */
    lastPoint: {
        x: number;
        y: number;
    } | null;
};
/** Coerce loose cell values (arrays, comma strings) into a number array. */
export declare function toSparklineValues(value: unknown): number[];
export declare function buildSparkline(values: number[], cfg?: SparklineConfig): SparklineGeometry | null;