import { NgZone, Provider, OnDestroy } from '@angular/core';
import { DragBackend } from './drag-backend';
import { Unsubscribe } from './unsubscribe';
import { DragMonitor } from '../drag-monitor';
export declare class Html5DragBackend extends DragBackend implements OnDestroy {
    private sourceNodes;
    private dragStartSourceId;
    private activeSourceId;
    private dragOverTargetId;
    private dropTargetId;
    private activeTargetId;
    private currentSourceOffset;
    private nativeFileDragTimeout?;
    constructor(monitor: DragMonitor);
    ngOnDestroy(): void;
    teardown: Unsubscribe;
    connectDragSource(sourceId: string, node: any): Unsubscribe;
    connectDropTarget(targetId: string, node: any): Unsubscribe;
    setup(eventTarget: any): void;
    private handleGlobalDragStart(event);
    private handleGlobalDragEnd(event);
    private handleGlobalDragOver(event);
    private handleGlobalDrop(event);
    private handleGlobalDragLeave(e);
    private handleDragStart(sourceId);
    private handleDragOver(targetId);
    private handleDrop(targetId);
    private emitEvent(event);
}
export declare function html5BackendFactory(ngZone: NgZone, monitor: DragMonitor): Html5DragBackend;
export declare const HTML5_DRAG_BACKEND_PROVIDER: Provider;