import { ReactiveController, ReactiveControllerHost } from 'lit';
import type { PromptBoxAttachment } from '../types';
export interface AttachmentsHost extends ReactiveControllerHost {
    allowImages: boolean;
    allowFiles: boolean;
    acceptedFileTypes: string[];
    disabled: boolean;
    readonly: boolean;
    pending: boolean;
    dispatchEvent(event: Event): boolean;
}
export declare class AttachmentsController implements ReactiveController {
    private _host;
    private _attachments;
    private _idCounter;
    constructor(host: AttachmentsHost);
    hostConnected(): void;
    hostDisconnected(): void;
    get attachments(): PromptBoxAttachment[];
    get hasAttachments(): boolean;
    get imageAttachments(): PromptBoxAttachment[];
    get fileAttachments(): PromptBoxAttachment[];
    addFiles(files: File[]): string[];
    removeAttachment(id: string): void;
    clearAttachments(): void;
    getAttachments(): PromptBoxAttachment[];
    handlePastedImages(clipboardData: DataTransfer | null): boolean;
    getAcceptAttribute(): string;
    isImageFile(file: File): boolean;
    private _isImageFile;
    private _isFileTypeAccepted;
    private _generateId;
    private _revokeAllPreviewUrls;
    private _dispatchChange;
}