import type { ChartArea, FontSpec, Point } from '../types/index.js'; import type { TRBL, TRBLCorners } from '../types/geometric.js'; /** * @alias Chart.helpers.options * @namespace */ /** * Converts the given line height `value` in pixels for a specific font `size`. * @param value - The lineHeight to parse (eg. 1.6, '14px', '75%', '1.6em'). * @param size - The font size (in pixels) used to resolve relative `value`. * @returns The effective line height in pixels (size * 1.2 if value is invalid). * @see https://developer.mozilla.org/en-US/docs/Web/CSS/line-height * @since 2.7.0 */ export declare function toLineHeight(value: number | string, size: number): number; /** * @param value * @param props */ export declare function _readValueToProps<K extends string>(value: number | Record<K, number>, props: K[]): Record<K, number>; export declare function _readValueToProps<K extends string, T extends string>(value: number | Record<K & T, number>, props: Record<T, K>): Record<T, number>; /** * Converts the given value into a TRBL object. * @param value - If a number, set the value to all TRBL component, * else, if an object, use defined properties and sets undefined ones to 0. * x / y are shorthands for same value for left/right and top/bottom. * @returns The padding values (top, right, bottom, left) * @since 3.0.0 */ export declare function toTRBL(value: number | TRBL | Point): Record<"left" | "top" | "bottom" | "right", number>; /** * Converts the given value into a TRBL corners object (similar with css border-radius). * @param value - If a number, set the value to all TRBL corner components, * else, if an object, use defined properties and sets undefined ones to 0. * @returns The TRBL corner values (topLeft, topRight, bottomLeft, bottomRight) * @since 3.0.0 */ export declare function toTRBLCorners(value: number | TRBLCorners): Record<"topLeft" | "topRight" | "bottomLeft" | "bottomRight", number>; /** * Converts the given value into a padding object with pre-computed width/height. * @param value - If a number, set the value to all TRBL component, * else, if an object, use defined properties and sets undefined ones to 0. * x / y are shorthands for same value for left/right and top/bottom. * @returns The padding values (top, right, bottom, left, width, height) * @since 2.7.0 */ export declare function toPadding(value?: number | TRBL): ChartArea; /** * Parses font options and returns the font object. * @param options - A object that contains font options to be parsed. * @param fallback - A object that contains fallback font options. * @return The font object. * @private */ export declare function toFont(options: Partial<FontSpec>, fallback?: Partial<FontSpec>): { family: string; lineHeight: number; size: number; style: "normal" | "inherit" | "italic" | "oblique" | "initial"; weight: number | "bold" | "normal" | "lighter" | "bolder"; string: string; }; /** * Evaluates the given `inputs` sequentially and returns the first defined value. * @param inputs - An array of values, falling back to the last value. * @param context - If defined and the current value is a function, the value * is called with `context` as first argument and the result becomes the new input. * @param index - If defined and the current value is an array, the value * at `index` become the new input. * @param info - object to return information about resolution in * @param info.cacheable - Will be set to `false` if option is not cacheable. * @since 2.7.0 */ export declare function resolve(inputs: Array<unknown>, context?: object, index?: number, info?: { cacheable: boolean; }): unknown; /** * @param minmax * @param grace * @param beginAtZero * @private */ export declare function _addGrace(minmax: { min: number; max: number; }, grace: number | string, beginAtZero: boolean): { min: number; max: number; }; /** * Create a context inheriting parentContext * @param parentContext * @param context * @returns */ export declare function createContext<T extends object>(parentContext: null, context: T): T; export declare function createContext<T extends object, P extends T>(parentContext: P, context: T): P & T;