import { type Observable } from 'rxjs';
import { type DfDragDrop } from './drag-drop.interface';
import * as i0 from "@angular/core";
/**
 * Centralised RxJS-based drag-and-drop stream factory.
 * Creates **one** `pointermove / pointerup` listener on `document`
 * and produces per-element drag streams filtered by `pointerId`.
 */
export declare class DragDropService {
    private readonly document;
    /** Cache for element-scoped `pointerdown` observables (lazy–created). */
    private readonly pointerDownMap;
    /** Cache for ready-made drag-stream observables (so we never duplicate work). */
    private readonly dragDropStreams;
    /** Shared `pointermove` stream on the whole document (ref-counted). */
    private readonly pointerMove$;
    /** Shared `pointerup` stream on the whole document (ref-counted). */
    private readonly pointerUp$;
    /**
     * Returns (and caches) a drag-and-drop observable for the provided element.
     * The observable emits:
     *   • `DfDragDropStage.Move` every animation frame while the pointer is down;
     *   • a final `DfDragDropStage.End` when the pointer is released.
     */
    streamFor(el: HTMLElement): Observable<DfDragDrop>;
    static ɵfac: i0.ɵɵFactoryDeclaration<DragDropService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<DragDropService>;
}