import { HookIndex } from '../../interfacesPublic';
import { AutoPlatformService } from '../platform/autoPlatformService';
import * as i0 from "@angular/core";
/**
 * A utility service that sanitizes an Element and all of its children while exluding found hook elements
 */
export declare class ContentSanitizer {
    private platformService;
    attrWhitelist: string[];
    constructor(platformService: AutoPlatformService);
    /**
     * Sanitizes an element while preserving marked hook anchors
     *
     * @param contentElement - The element to sanitize
     * @param hookIndex - The current hookIndex
     * @param token - The current ParseToken
     */
    sanitize(contentElement: any, hookIndex: HookIndex, token: string): any;
    /**
     * Sanitizes a single element's attributes
     *
     * @param element - The element in question
     */
    private sanitizeElementAttrs;
    /**
     * Finds and encodes all tags that match the specified regex so that they survive sanitization
     *
     * @param content - The stringified html content to search
     * @param substrRegex - The regex that matches the element tags
     */
    private findAndEncodeTags;
    /**
     * Encodes the special html chars in a html tag so that is is considered a harmless string
     *
     * @param element - The element as a string
     */
    private encodeTagString;
    /**
     * Decodes the encoded html chars in a html tag again
     *
     * @param element - The element as a string
     */
    private decodeTagString;
    static ɵfac: i0.ɵɵFactoryDeclaration<ContentSanitizer, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<ContentSanitizer>;
}