import { ACustomAnimate } from '../custom-animate';
import type { IRichTextCharacter, IAnimate, IStep, EasingType } from '@visactor/vrender-core';
export declare class OutputRichText extends ACustomAnimate<{
    textConfig: IRichTextCharacter[];
}> {
    valid: boolean;
    private fromTextConfig;
    private toTextConfig;
    private originalTextConfig;
    private showCursor;
    private cursorChar;
    private blinkCursor;
    private beforeText;
    private afterText;
    private fadeOutChars;
    private fadeOutDuration;
    private direction;
    constructor(from: {
        textConfig: IRichTextCharacter[];
    }, to: {
        textConfig: IRichTextCharacter[];
    }, duration: number, easing: EasingType, params?: {
        showCursor?: boolean;
        cursorChar?: string;
        blinkCursor?: boolean;
        beforeText?: string;
        afterText?: string;
        fadeOutChars?: boolean;
        fadeOutDuration?: number;
        direction?: 'forward' | 'backward';
    });
    onFirstRun(): void;
    onEnd(cb?: (animate: IAnimate, step: IStep) => void): void;
    onUpdate(end: boolean, ratio: number, out: Record<string, any>): void;
    private applyFadeEffect;
    private addCursor;
}