import { FontMetrics } from './font-metrics';
import { Paragraph } from './paragraph';
export type LineMetrics = Pick<FontMetrics, 'ascent' | 'descent' | 'fontSize'>;
export type AddLineOptions = {
    seq: number;
    text: string;
    width: number;
    hasEllipsis: boolean;
    lineMetrics: LineMetrics;
};
type AddLineFunction = (options: AddLineOptions) => void;
export declare class TextWrapper {
    private readonly paragraph;
    constructor(paragraph: Paragraph);
    /**
     * 当前行序号
     */
    private seq;
    /**
     * 当前行 text
     */
    private text;
    /**
     * 当前行 width
     */
    private width;
    /**
     * 最大行数
     */
    private maxLines;
    breakTextIntoLines(tokens: string[], maxWidth: number, callback: AddLineFunction): void;
    breakWord(text: string, font: string, breakWidth: number, atLeast?: 0 | 1): number;
    private measureWidthCache;
    private measureWidth;
    get isLastLine(): boolean;
    getLineMaxWidth(maxWidth: number): number;
    /**
     * 结束当前行
     */
    private endLine;
    /**
     * 当前行是否可以 commit
     */
    get canCommit(): boolean;
    get textOverflow(): string;
    private _textOverflowWidth;
    get textOverflowWidth(): number;
}
export {};