import { InjectionToken } from '@angular/core';
/** Emoji Rendering Mode */
export declare type EmojiMode = 'auto' | 'native' | 'web';
export interface EmojiConfig {
    emojiPath?: string;
    emojiExt?: string;
    emojiMode?: EmojiMode;
}
export declare const EmojiConfigToken: InjectionToken<EmojiConfig>;
export declare class EmojiUtils {
    readonly native: boolean;
    readonly regex: RegExp;
    private config;
    private readonly filePath;
    private readonly fileExt;
    constructor(native: boolean, regex: RegExp, config: EmojiConfig);
    private assessPath;
    private assessExt;
    /** Returns the most suitable emoji mode based on the request */
    emojiMode(mode?: EmojiMode): Exclude<EmojiMode, 'auto'>;
    /** Computes the full path to load the image corersponding to the given emoji */
    imageFilePath(emoji: string): string;
    isEmoji(source: string): boolean;
    matchEmojiCodes(source: string): RegExpExecArray;
    /** Parses the source text searching for emoji unicode sequences */
    parseEmojiCodes(source: string, callbackfn: (match: string, index: number) => void): void;
}