import type { ICanvasRenderingContext2D } from '../../../../environment/canvas/ICanvasRenderingContext2D';
/**
 * A number, or a string containing a number.
 * @category text
 * @typedef {object} FontMetrics
 * @property {number} ascent - Font ascent
 * @property {number} descent - Font descent
 * @property {number} fontSize - Font size
 * @advanced
 */
export interface FontMetrics {
    ascent: number;
    descent: number;
    fontSize: number;
}
/**
 * Function type for measuring text width.
 * @internal
 */
export type MeasureTextFn = (text: string, letterSpacing: number, context: ICanvasRenderingContext2D) => number;
/**
 * Function type for checking if characters can be broken.
 * @internal
 */
export type CanBreakCharsFn = (char: string, nextChar: string, token: string, index: number, breakWords: boolean) => boolean;
/**
 * Function type for splitting words into characters.
 * @internal
 */
export type WordWrapSplitFn = (token: string) => string[];