import type{ReactiveControllerHost}from'lit';
/** Drag-session preview/outcome state. `'default'` is the resting state; `'accept'`/`'reject'`
*  preview what a drop would do, driven by {@link DropSessionCallbacks.previewRejects}. */
export type DropSessionState='default'|'accept'|'reject';export interface DropSessionHost extends ReactiveControllerHost{readonly isConnected:boolean;}export interface DropSessionCallbacks{
/** Whether the host currently refuses drag/drop input (own or fieldset-cascaded disabled). */
isDisabled():boolean;
/** Preview classification for a dragenter/dragover payload: item-shaped values exposing only
*  `.kind`/`.type` (never real `File` data -- sizes and names aren't available pre-drop). Return
*  `true` to preview the session as a reject. */
previewRejects(items:readonly DataTransferItem[]):boolean;
/** Invoked every time this controller sets `state` (including a same-value reset), mirroring
*  the exact call sites the original implementation this was extracted from used to sync
*  `CustomStateSet`/announcements from -- never coalesced or deduplicated. */
onStateChange():void;}export type DroppedFolderReadResult={status:'complete';files:File[];}|{status:'cancelled';}|{status:'limit';name:string;}|{status:'error';name:string;};export interface DropSessionBeginResult{
/** Cancellation token for this drop; pass to {@link DropSessionController.readFolders} and
*  {@link DropSessionController.isCurrent}. */
readonly token:number;
/** Files already available synchronously from `DataTransfer.files`. */
readonly files:File[];
/** Top-level directory entries found among `DataTransfer.items`, needing an async walk. */
readonly folders:FileSystemEntry[];
/** `true` when the dropped item count exceeded the traversal budget before any entry was read. */
readonly overLimit:boolean;}
/** Reads a `DataTransfer.files`/`.items`-shaped clipboard or drop payload into a plain `File[]`,
*  ignoring anything that isn't a real `File`. Shared by every drop/paste-consuming component so
*  a hostile or partial `FileList`-alike can't smuggle a non-`File` value past `isAllowed()`. */
export declare function readFileList(list:FileList|null|undefined):File[];