import { Block } from "./block.js";
import { LayoutNode } from "./nodes.js";
import { NodeHandler, SizingContext } from "./sizing.js";
export type BarKey = {
    name: string;
    color?: string;
    symbol?: string;
};
export type Bar = {
    label: string;
    values: number[];
};
export type BarMode = "stacked" | "grouped";
export type ResolvedKey = {
    name: string;
    color: string;
    symbol: string;
};
export declare const DEFAULT_COLORS: string[];
export declare const DEFAULT_SYMBOLS: string[];
export declare function resolveColor(name: unknown): (s: string) => string;
export declare function resolveKeys(keys: BarKey[] | null, barChar: string): ResolvedKey[];
export declare function dataRange(data: Bar[], mode: BarMode): {
    min: number;
    max: number;
};
export declare function barCells(value: number, rangeSpan: number, barArea: number): number;
export declare function baselineColumn(rangeMin: number, rangeMax: number, barArea: number): number;
export declare function stackSegments(values: number[], rangeSpan: number, barArea: number): number[];
export declare function validateChart(keys: ResolvedKey[], data: Bar[], mode: BarMode): void;
export declare function renderBarChart(node: LayoutNode): Block;
export declare function sizeBarChart(node: LayoutNode, ctx: SizingContext): LayoutNode;
export declare const barchart: NodeHandler;