import * as i0 from '@angular/core';
import { OnInit, OnChanges, DoCheck, OnDestroy, EventEmitter, ElementRef, AfterContentInit, ChangeDetectorRef } from '@angular/core';
import { ValidatorFn, ControlValueAccessor, NgControl } from '@angular/forms';
import { Subject, BehaviorSubject } from 'rxjs';

type BooleanInput = boolean | string | number | null | undefined;
/** Inspired by the Angular Material library, we check our input properties. */
declare function coerceBoolean(value?: BooleanInput): boolean;
/** Allows filtering `null` and `undefined` elements from arrays. */
declare function nonNullable<T>(value: T | null): value is T;

/**
 * To achieve a consistent behavior when dropping directories,
 * we add an additional property to the `File` object.
 * This will only work with the `webkitdirectories` attribute.
 */
type File$1 = globalThis.File & {
    relativePath?: string;
};
/**
 * A file input element can either be empty,
 * hold a single file or hold multiple files.
 */
type FileInputValue = File$1 | File$1[] | null;
/**
 * The file input mode controls the value setting strategy.
 * - `replace`: Replace the current value with the new value.
 * - `append`: Append the new value to the current value if `multiple` is `true`.
 */
type FileInputMode = 'replace' | 'append';

declare class AcceptService {
    /**
     * Returns `true` if all files match the provided `accept` parameter.
     * See [MDN](https://developer.mozilla.org/en-US/docs/Web/HTML/Attributes/accept)
     * for more information.
     */
    accepts(fileValue: FileInputValue, accept: string): boolean;
    private isAcceptedByExtension;
    private isAcceptedByMimeType;
    private parseAttribute;
    private isValidMimeType;
    private isValidExtension;
    private isValidToken;
    private isAscii;
    static ɵfac: i0.ɵɵFactoryDeclaration<AcceptService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<AcceptService>;
}

declare class FileInputValidators {
    /**
     * Checks if the file size is equal or greater than the minimum size.
     * Validates every file within array or single file. Returns no error when null.
     */
    static minSize(min: number): ValidatorFn;
    /**
     * Checks if the file size is equal or smaller than the allowed size.
     * Validates every file within array or single file. Returns no error when null.
     */
    static maxSize(max: number): ValidatorFn;
    /** Checks if all provided files match the specified `accept` value. */
    static accept(accept: string): ValidatorFn;
    private static validate;
}

declare class FileInputDirective implements ControlValueAccessor, OnInit, OnChanges, DoCheck, OnDestroy {
    private _value;
    private _parent;
    private _focused;
    private _touched;
    private _errorState;
    private _onChange;
    private _onTouched;
    /** Emits whenever the parent dropzone should re-render. */
    readonly stateChanges: Subject<void>;
    /** The value of the file input control. */
    get _fileValue(): FileInputValue;
    set _fileValue(newValue: FileInputValue);
    /** Returns the selected value of the file input control (alias as syntactic sugar). */
    get value(): FileInputValue;
    /** Returns true if the file input has no selected item. */
    get empty(): boolean;
    /** Returns the error state. */
    get errorState(): boolean;
    /** Returns true if the file input element is focused. */
    get focused(): boolean;
    /** Returns true if the `multiple` attribute is present on the input element. */
    get multiple(): boolean;
    /** Controls the accepted file types. */
    get accept(): string;
    set accept(value: string);
    private _accept;
    /** Controls the value setting strategy. */
    get mode(): FileInputMode;
    set mode(value: FileInputMode);
    private _mode;
    /** The disabled state of the file input control. */
    get disabled(): boolean;
    set disabled(value: BooleanInput);
    /** Event emitted when the selected files have been changed by the user. */
    readonly selectionChange: EventEmitter<FileInputValue>;
    static ngAcceptInputType_disabled: BooleanInput;
    private _acceptService;
    private _parentForm;
    private _parentFormGroup;
    elementRef: ElementRef<any>;
    ngControl: NgControl | null;
    constructor();
    ngOnInit(): void;
    ngOnChanges(): void;
    ngDoCheck(): void;
    ngOnDestroy(): void;
    /** Opens the native OS file picker. */
    openFilePicker(): void;
    /** Handles the native (change) event. */
    _handleChange(event: Event): void;
    /** Handles the drop of a file array. */
    handleFileDrop(files: File[]): void;
    /** Sets the selected files value as required by the `ControlValueAccessor` interface. */
    writeValue(value: FileInputValue): void;
    /** Registers the change handler as required by `ControlValueAccessor`. */
    registerOnChange(fn: (value: FileInputValue) => void): void;
    /** Registers the touched handler as required by `ControlValueAccessor`. */
    registerOnTouched(fn: () => void): void;
    /** Implements the disabled state setter from `ControlValueAccessor`. */
    setDisabledState(disabled: boolean): void;
    /** Called when the input element is focused or blurred. */
    _focusChanged(focused: boolean): void;
    /**
     * On directory drops, the readonly `webkitRelativePath` property is not available.
     * We manually set the `relativePath` property for dropped file trees instead.
     * To achieve a consistent behavior when using the file picker, we copy the value.
     */
    private _copyRelativePaths;
    /** Asserts that the provided value type matches the input element's multiple attribute. */
    private _assertMultipleValue;
    private _appendOrReplace;
    private _canAppend;
    private _updateErrorState;
    static ɵfac: i0.ɵɵFactoryDeclaration<FileInputDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<FileInputDirective, "input[fileInput]", ["fileInput"], { "_fileValue": { "alias": "value"; "required": false; }; "accept": { "alias": "accept"; "required": false; }; "mode": { "alias": "mode"; "required": false; }; "disabled": { "alias": "disabled"; "required": false; }; }, { "selectionChange": "selectionChange"; }, never, never, true, never>;
}

declare class DropzoneService {
    /**
     * Returns a `File[]` from a `DragEvent`. Accepts a list of files or folders.
     */
    getFiles(event: DragEvent): Promise<File$1[]>;
    private _toFileSystemEntry;
    private _getFilesFromEntry;
    /**
     * In Chrome >= 77, the `readEntries` method returns only 100 files.
     * To achieve a consistent behavior across browsers and not restrict user interaction,
     * we break the limit by recursively calling `readEntries`.
     */
    private _readDirectoryWithoutLimit;
    private _isFile;
    private _isDirectory;
    private _flattenFiles;
    private _readFilePromise;
    private _readDirectoryPromise;
    static ɵfac: i0.ɵɵFactoryDeclaration<DropzoneService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<DropzoneService>;
}

declare class DropzoneComponent implements AfterContentInit, OnDestroy {
    protected _destroy$: Subject<void>;
    protected _changeDetectorRef: ChangeDetectorRef;
    protected _dropzoneService: DropzoneService;
    readonly fileInputDirective: FileInputDirective | null;
    readonly dragover$: BehaviorSubject<boolean>;
    get isDragover(): boolean;
    get disabled(): boolean;
    get focused(): boolean;
    get errorState(): boolean;
    get value(): FileInputValue;
    set value(newValue: FileInputValue);
    ngAfterContentInit(): void;
    ngOnDestroy(): void;
    /** Opens the native OS file picker. */
    openFilePicker(): void;
    /** Forwards styling property from control to host element. */
    _forwardProp(prop: keyof NgControl): boolean;
    _onDragOver: (event: DragEvent) => void;
    _onDragEnter: (event: DragEvent) => void;
    _onDragLeave: (event: DragEvent) => void;
    _onDrop: (event: DragEvent) => Promise<void>;
    static ɵfac: i0.ɵɵFactoryDeclaration<DropzoneComponent, never>;
    static ɵcmp: i0.ɵɵComponentDeclaration<DropzoneComponent, "ngx-dropzone", ["dropzone"], { "value": { "alias": "value"; "required": false; }; }, {}, ["fileInputDirective"], ["*"], true, never>;
}

export { AcceptService, DropzoneComponent, DropzoneService, FileInputDirective, FileInputValidators, coerceBoolean, nonNullable };
export type { BooleanInput, File$1 as File, FileInputMode, FileInputValue };