import { TextStyle } from './TextStyle';
interface IFontMetrics {
    ascent: number;
    descent: number;
    fontSize: number;
}
export declare class TextMetrics {
    text: string;
    style: TextStyle;
    width: number;
    height: number;
    lines: string[];
    lineWidths: number[];
    lineHeight: number;
    maxLineWidth: number;
    fontProperties: IFontMetrics;
    static METRICS_STRING: string;
    static BASELINE_SYMBOL: string;
    static BASELINE_MULTIPLIER: number;
    static _canvas: HTMLCanvasElement | OffscreenCanvas;
    static _context: CanvasRenderingContext2D | OffscreenCanvasRenderingContext2D;
    static _fonts: {
        [font: string]: IFontMetrics;
    };
    static _newlines: number[];
    static _breakingSpaces: number[];
    constructor(text: string, style: TextStyle, width: number, height: number, lines: string[], lineWidths: number[], lineHeight: number, maxLineWidth: number, fontProperties: IFontMetrics);
    static measureText(text: string, style: TextStyle, wordWrap?: boolean, canvas?: HTMLCanvasElement | OffscreenCanvas): TextMetrics;
    private static wordWrap;
    private static addLine;
    private static getFromCache;
    private static collapseSpaces;
    private static collapseNewlines;
    private static trimRight;
    private static isNewline;
    static isBreakingSpace(char: string, _nextChar?: string): boolean;
    private static tokenize;
    static canBreakWords(_token: string, breakWords: boolean): boolean;
    static canBreakChars(_char: string, _nextChar: string, _token: string, _index: number, _breakWords: boolean): boolean;
    static wordWrapSplit(token: string): string[];
    static measureFont(font: string): IFontMetrics;
    /**
     * Clear font metrics in metrics cache.
     *
     * @static
     * @param {string} [font] - font name. If font name not set then clear cache for all fonts.
     */
    static clearMetrics(font?: string): void;
}
export {};