import { type ColorSchemeName } from '../colors';
import type { CompositionType } from './';
import type { ElementSymbol } from '../element';
export type ChartSegment = {
    element: ElementSymbol;
    amount: number;
    fraction: number;
    color: string;
    text_color: string;
};
export type ChartLabelOptions = {
    show_amounts: boolean;
    show_percentages: boolean;
};
export declare const composition_segments: (composition: CompositionType, color_scheme: ColorSchemeName) => ChartSegment[];
export declare const segment_suffix: ({ amount, fraction }: ChartSegment, { show_amounts, show_percentages }: ChartLabelOptions) => string;
export declare const segment_title: ({ element, amount, fraction }: ChartSegment) => string;
export declare const fit_font_scale: (base_scale: number, n_chars: number, available_space: number, min_scale_factor?: number, base_font_size?: number) => number;