import { SafeHtml, SafeResourceUrl } from '@angular/platform-browser';
import { Observable } from 'rxjs';
import * as i0 from "@angular/core";
export interface KbqIconOptions {
    viewBox?: string;
    withCredentials?: boolean;
}
export declare class KbqIconRegistry {
    private readonly sanitizer;
    private readonly document;
    private readonly httpClient;
    private readonly iconsConfig;
    private readonly resolvers;
    /** Individual icon configs, keyed by "namespace:name". */
    private readonly iconConfigs;
    /** Icon-set configs per namespace. */
    private readonly iconSetConfigs;
    /** In-progress URL fetches to dedupe concurrent requests. */
    private readonly inProgressUrlFetches;
    /** Cached parsed SVG sets, keyed by URL string. */
    private readonly cachedIconSets;
    constructor();
    /** Registers an SVG icon by URL in the default namespace. */
    addSvgIcon(name: string, url: SafeResourceUrl, options?: KbqIconOptions): void;
    /** Registers an SVG icon from an inline HTML string in the default namespace. */
    addSvgIconLiteral(name: string, literal: SafeHtml, options?: KbqIconOptions): void;
    /** Registers an SVG icon by URL under the given namespace. */
    addSvgIconInNamespace(namespace: string, name: string, url: SafeResourceUrl, options?: KbqIconOptions): void;
    /** Registers an SVG icon from an inline HTML string under the given namespace. */
    addSvgIconLiteralInNamespace(namespace: string, name: string, literal: SafeHtml, options?: KbqIconOptions): void;
    /** Registers an SVG sprite file in the default namespace. Icons are looked up by their `symbol id`. */
    addSvgIconSet(url: SafeResourceUrl, options?: KbqIconOptions): void;
    /** Registers an SVG sprite file under the given namespace. Duplicate URLs are silently ignored. */
    addSvgIconSetInNamespace(namespace: string, url: SafeResourceUrl, options?: KbqIconOptions): void;
    /**
     * Emits a cloned SVGElement for the given name.
     * Accepts "namespace:name" syntax.
     */
    getNamedSvgIcon(name: string, namespace?: string): Observable<SVGElement>;
    private cacheIcon;
    private loadIcon;
    private registerIconSet;
    private loadIconFromSets;
    private loadIconSet;
    private extractIconFromSet;
    private svgElementFromText;
    private fetchUrl;
    static ɵfac: i0.ɵɵFactoryDeclaration<KbqIconRegistry, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<KbqIconRegistry>;
}