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 王天杨
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import type { Backend, DragDropManager, Unsubscribe } from 'dnd-core';
import type { HTML5BackendContext, HTML5BackendOptions } from './types.js';
export declare class HTML5BackendImpl implements Backend {
private options;
private actions;
private monitor;
private registry;
private enterLeaveCounter;
private sourcePreviewNodes;
private sourcePreviewNodeOptions;
private sourceNodes;
private sourceNodeOptions;
private dragStartSourceIds;
private dropTargetIds;
private dragEnterTargetIds;
private currentNativeSource;
private currentNativeHandle;
private currentDragSourceNode;
private altKeyPressed;
private mouseMoveTimeoutTimer;
private asyncEndDragFrameId;
private dragOverTargetIds;
private lastClientOffset;
private hoverRafId;
constructor(manager: DragDropManager, globalContext?: HTML5BackendContext, options?: HTML5BackendOptions);
/**
* Generate profiling statistics for the HTML5Backend.
*/
profile(): Record<string, number>;
get window(): Window | undefined;
get document(): Document | undefined;
/**
* Get the root element to use for event subscriptions
*/
private get rootElement();
setup(): void;
teardown(): void;
connectDragPreview(sourceId: string, node: Element, options: any): Unsubscribe;
connectDragSource(sourceId: string, node: Element, options: any): Unsubscribe;
connectDropTarget(targetId: string, node: HTMLElement): Unsubscribe;
private addEventListeners;
private removeEventListeners;
private getCurrentSourceNodeOptions;
private getCurrentDropEffect;
private getCurrentSourcePreviewNodeOptions;
private getSourceClientOffset;
private isDraggingNativeItem;
private beginDragNativeItem;
private endDragNativeItem;
private isNodeInDocument;
private endDragIfSourceWasRemovedFromDOM;
private setCurrentDragSourceNode;
private clearCurrentDragSourceNode;
private scheduleHover;
private cancelHover;
handleTopDragStartCapture: () => void;
handleDragStart(e: DragEvent, sourceId: string): void;
handleTopDragStart: (e: DragEvent) => void;
handleTopDragEndCapture: () => void;
handleTopDragEnterCapture: (e: DragEvent) => void;
handleDragEnter(_e: DragEvent, targetId: string): void;
handleTopDragEnter: (e: DragEvent) => void;
handleTopDragOverCapture: (e: DragEvent) => void;
handleDragOver(_e: DragEvent, targetId: string): void;
handleTopDragOver: (e: DragEvent) => void;
handleTopDragLeaveCapture: (e: DragEvent) => void;
handleTopDropCapture: (e: DragEvent) => void;
handleDrop(_e: DragEvent, targetId: string): void;
handleTopDrop: (e: DragEvent) => void;
handleSelectStart: (e: DragEvent) => void;
}
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