import { ElementRef } from '@angular/core';
import { NgsRevealConfig } from './ngs-reveal-config';
import { WindowService } from './window.service';
import { Observable } from 'rxjs';
/**
 * Type that represents the target that can be passed to `ScrollReveal().reveal()`.
 */
export declare type NgsRevealTarget = string | HTMLElement | HTMLCollection | Array<any>;
/**
 * Basic interface to represent `ScrollReveal` object.
 */
export interface NgsScrollReveal {
    /**
     * Controls whether or not to output help messages to the console when unexpected things occur at runtime.
     */
    debug?: boolean;
    /**
     * When `ScrollReveal` is instantiated on unsupported or disabled browsers,
     * a non-operational instance is created with a `noop` property that returns `true`
     */
    noop: boolean;
    /**
     * Returns the version of `ScrollReveal` currently loaded on the page.
     */
    version?: string;
    /**
     * When non-resetting reveal animations complete, `ScrollReveal` will remove that elements event listeners, generated styles and metadata.
     * In some cases (such as asynchronous sequences), you may not want this behavior.
     * @param target the related element
     */
    clean(target: NgsRevealTarget): void;
    /**
     * Reverses the effects of all `reveal()` calls, removing all generated styles and event listeners, and clears the `ScrollReveal` store.
     */
    destroy(): void;
    /**
     * Invokes all previous `reveal()` calls (with the appropriate arguments), to capture any new elements added to the DOM.
     */
    sync(): void;
    /**
     * Registers the target element(s) with ScrollReveal, generates animation styles,
     * and attaches event listeners to manage when styles are applied.
     * @param target element to reveal
     * @param options optionbs to use to reveal
     * @param syncing whether or not to sync newly added elements (through an asyn call for e.g) with DOM
     */
    reveal(target: NgsRevealTarget, options?: NgsRevealConfig, syncing?: boolean): void;
    isSupported(): boolean;
}
/**
 * Marker interface to indicate that an object (typically `window`) has `scrollreveal` property.
 */
export interface NgsHasScrollReveal {
    scrollReveal: NgsScrollReveal;
}
/**
 * Service to inject in directives to use ScrollReveal JS.
 * It delegates the work to SR, when DOM manipulation is possible (i.e app is not running in a web worker for e.g).
 * If not possible, most methods simply do nothing, as DOM elements are not available anyway.
 */
export declare class NgsRevealService {
    private sr;
    private window;
    private config;
    private beforeRevealSource;
    private afterRevealSource;
    private beforeResetSource;
    private afterResetSource;
    /**
     * Observable to subscribe to and get notified before an element is revealed.
     */
    beforeReveal$: Observable<HTMLElement>;
    /**
     * Observable to subscribe to and get notified after an element is revealed.
     */
    afterReveal$: Observable<HTMLElement>;
    /**
     * Observable to subscribe to and get notified before an element is reset.
     */
    beforeReset$: Observable<HTMLElement>;
    /**
     * Observable to subscribe to and get notified after an element is reset.
     */
    afterReset$: Observable<HTMLElement>;
    constructor(config: NgsRevealConfig, windowService: WindowService);
    /**
     * Initializes Cookie Consent with the provided configuration.
     * @param config the configuration object
     */
    init(config: NgsRevealConfig): void;
    /**
   * Gets the current configuration  used by ScrollReveal.
   */
    getConfig(): NgsRevealConfig;
    /**
     * Method to reveal a single DOM element.
     * @param elementRef  a reference to the element to reveal
     * @param config      (optional) custom configuration to use when revealing this element
     */
    reveal(elementRef: ElementRef<HTMLElement>, config?: NgsRevealConfig): void;
    /**
     * Method to reveal a set of DOM elements.
     * @param parentElementRef  the parent DOM element encaspulating the child elements to reveal
     * @param selector          a list of CSS selectors (comma-separated) that identifies child elements to reveal
     * @param interval          (optional) interval in milliseconds, to animate child elemnts sequentially
     * @param config            (optional) custom configuration to use when revealing this set of elements
     */
    revealSet(parentElementRef: ElementRef<HTMLElement>, selector: string, interval?: number, config?: NgsRevealConfig): void;
    /**
     * Method to synchronize and consider newly added child elements (for e.g when child elements were added asynchronously to parent DOM) .
     */
    sync(): void;
    /**
     * Reverses the effects of all `reveal()` calls, removing all generated styles and event listeners, and clears the `ScrollReveal` store.
     */
    destroy(): void;
}