import { Observable } from 'rxjs';
import { Theme } from '../declarations/enums/theme.enum';
import * as i0 from "@angular/core";
export declare class ThemeService {
    private readonly document;
    private readonly themeState$;
    readonly theme$: Observable<Theme>;
    readonly reversedTheme$: Observable<Theme>;
    readonly themeClass$: Observable<string>;
    private readonly subscription;
    constructor(document: Document);
    setTheme(theme: Theme): void;
    toggleTheme(): void;
    private produceThemeChanges;
    private setHtmlClassesByTheme;
    static ɵfac: i0.ɵɵFactoryDeclaration<ThemeService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<ThemeService>;
}