import { Time } from '@jupyterlab/coreutils';
import { DocumentRegistry } from '@jupyterlab/docregistry';
import { Contents } from '@jupyterlab/services';
import { IStateDB } from '@jupyterlab/statedb';
import { ITranslator, TranslationBundle } from '@jupyterlab/translation';
import { Drag } from '@lumino/dragdrop';
import { Message } from '@lumino/messaging';
import { ISignal } from '@lumino/signaling';
import { Widget } from '@lumino/widgets';
import { FilterFileBrowserModel } from './model';
/**
 * A widget which hosts a file list area.
 */
export declare class DirListing extends Widget {
    /**
     * Construct a new file browser directory listing widget.
     *
     * @param options The constructor options
     */
    constructor(options: DirListing.IOptions);
    /**
     * Dispose of the resources held by the directory listing.
     */
    dispose(): void;
    /**
     * Get the model used by the listing.
     */
    get model(): FilterFileBrowserModel;
    /**
     * Get the dir listing header node.
     *
     * #### Notes
     * This is the node which holds the header cells.
     *
     * Modifying this node directly can lead to undefined behavior.
     */
    get headerNode(): HTMLElement;
    /**
     * Get the dir listing content node.
     *
     * #### Notes
     * This is the node which holds the item nodes.
     *
     * Modifying this node directly can lead to undefined behavior.
     */
    get contentNode(): HTMLElement;
    /**
     * The renderer instance used by the directory listing.
     */
    get renderer(): DirListing.IRenderer;
    /**
     * The current sort state.
     */
    get sortState(): DirListing.ISortState;
    /**
     * A signal fired when an item is opened.
     */
    get onItemOpened(): ISignal<DirListing, Contents.IModel>;
    /**
     * A signal fired when the selection changes.
     */
    get selectionChanged(): ISignal<DirListing, void>;
    /**
     * Create an iterator over the listing's selected items.
     *
     * @returns A new iterator over the listing's selected items.
     */
    selectedItems(): IterableIterator<Contents.IModel>;
    /**
     * Create an iterator over the listing's sorted items.
     *
     * @returns A new iterator over the listing's sorted items.
     */
    sortedItems(): IterableIterator<Contents.IModel>;
    /**
     * Sort the items using a sort condition.
     */
    sort(state: DirListing.ISortState): void;
    /**
     * Rename the first currently selected item.
     *
     * @returns A promise that resolves with the new name of the item.
     */
    rename(): Promise<string>;
    /**
     * Cut the selected items.
     */
    cut(): void;
    /**
     * Copy the selected items.
     */
    copy(): void;
    /**
     * Paste the items from the clipboard.
     *
     * @returns A promise that resolves when the operation is complete.
     */
    paste(): Promise<void>;
    /**
     * Delete the currently selected item(s).
     *
     * @returns A promise that resolves when the operation is complete.
     */
    delete(): Promise<void>;
    /**
     * Duplicate the currently selected item(s).
     *
     * @returns A promise that resolves when the operation is complete.
     */
    duplicate(): Promise<void>;
    /**
     * Select all listing items in the current directory.
     */
    selectAll(): Promise<void>;
    /**
     * Download the currently selected item(s).
     */
    download(): Promise<void>;
    /**
     * Restore the state of the file browser listing.
     *
     * @param id - The unique ID that is used to construct a state database key.
     *
     */
    restore(id: string): Promise<void>;
    private _stateColumnsKey;
    /**
     * Shut down kernels on the applicable currently selected items.
     *
     * @returns A promise that resolves when the operation is complete.
     */
    shutdownKernels(): Promise<void>;
    /**
     * Select next item.
     *
     * @param keepExisting - Whether to keep the current selection and add to it.
     */
    selectNext(keepExisting?: boolean): void;
    /**
     * Select previous item.
     *
     * @param keepExisting - Whether to keep the current selection and add to it.
     */
    selectPrevious(keepExisting?: boolean): void;
    /**
     * Select the first item that starts with prefix being typed.
     */
    selectByPrefix(): void;
    /**
     * Get whether an item is selected by name.
     *
     * @param name - The name of of the item.
     *
     * @returns Whether the item is selected.
     */
    isSelected(name: string): boolean;
    /**
     * Find a model given a click.
     *
     * @param event - The mouse event.
     *
     * @returns The model for the selected file.
     */
    modelForClick(event: MouseEvent): Contents.IModel | undefined;
    /**
     * Clear the selected items.
     */
    clearSelectedItems(emit?: boolean): void;
    /**
     * Select an item by name.
     *
     * @param name - The name of the item to select.
     * @param focus - Whether to move focus to the selected item.
     *
     * @returns A promise that resolves when the name is selected.
     */
    selectItemByName(name: string, focus?: boolean): Promise<void>;
    /**
     * Select an item by name.
     *
     * @param name - The name of the item to select.
     * @param focus - Whether to move focus to the selected item.
     * @param force - Whether to proceed with selection even if the file was already selected.
     *
     * @returns A promise that resolves when the name is selected.
     */
    private _selectItemByName;
    /**
     * Handle the DOM events for the directory listing.
     *
     * @param event - The DOM event sent to the widget.
     *
     * #### Notes
     * This method implements the DOM `EventListener` interface and is
     * called in response to events on the panel's DOM node. It should
     * not be called directly by user code.
     */
    handleEvent(event: Event): void;
    /**
     * A message handler invoked on an `'after-attach'` message.
     */
    protected onAfterAttach(msg: Message): void;
    /**
     * A message handler invoked on a `'before-detach'` message.
     */
    protected onBeforeDetach(msg: Message): void;
    /**
     * A message handler invoked on an `'after-show'` message.
     */
    protected onAfterShow(msg: Message): void;
    private _onContentResize;
    private _computeContentWidth;
    /**
     * Update the modified column's size
     */
    private _updateModifiedSize;
    /**
     * Rerender item nodes' modified dates, if the modified style has changed.
     */
    private _updateModifiedStyleAndSize;
    /**
     * Update only the modified dates.
     */
    protected updateModified(items: Contents.IModel[], nodes: HTMLElement[]): void;
    protected updateNodes(items: Contents.IModel[], nodes: HTMLElement[], sizeOnly?: boolean): void;
    /**
     * A handler invoked on an `'update-request'` message.
     */
    protected onUpdateRequest(msg: Message): void;
    onResize(msg: Widget.ResizeMessage): void;
    setColumnVisibility(name: DirListing.ToggleableColumn, visible: boolean): void;
    private _updateColumnSizes;
    private get _visibleColumns();
    private _setColumnSize;
    /**
     * Update the setting to sort notebooks above files.
     * This sorts the items again if the internal value is modified.
     */
    setNotebooksFirstSorting(isEnabled: boolean): void;
    /**
     * Update the setting to allow single click navigation.
     * This enables opening files/directories with a single click.
     */
    setAllowSingleClickNavigation(isEnabled: boolean): void;
    /**
     * Update the setting to allow drag and drop upload.
     * This enables uploading files via drag and drop.
     */
    setAllowDragDropUpload(isEnabled: boolean): void;
    /**
     * Would this click (or other event type) hit the checkbox by default?
     */
    protected isWithinCheckboxHitArea(event: Event): boolean;
    /**
     * Handle the `'click'` event for the widget.
     */
    private _evtClick;
    /**
     * Handle the `'scroll'` event for the widget.
     */
    private _evtScroll;
    /**
     * Handle the `'mousedown'` event for the widget.
     */
    private _evtMousedown;
    /**
     * Handle the `'mouseup'` event for the widget.
     */
    private _evtMouseup;
    /**
     * Handle the `'mousemove'` event for the widget.
     */
    private _evtMousemove;
    /**
     * Handle the opening of an item.
     */
    protected handleOpen(item: Contents.IModel): void;
    /**
     * Calculate the next focus index, given the current focus index and a
     * direction, keeping within the bounds of the directory listing.
     *
     * @param index Current focus index
     * @param direction -1 (up) or 1 (down)
     * @returns The next focus index, which could be the same as the current focus
     * index if at the boundary.
     */
    private _getNextFocusIndex;
    /**
     * Handle the up or down arrow key.
     *
     * @param event The keyboard event
     * @param direction -1 (up) or 1 (down)
     */
    private _handleArrowY;
    /**
     * cd ..
     *
     * Go up one level in the directory tree.
     */
    goUp(): Promise<void>;
    /**
     * Handle the `'keydown'` event for the widget.
     */
    protected evtKeydown(event: KeyboardEvent): void;
    /**
     * Handle the `'dblclick'` event for the widget.
     */
    protected evtDblClick(event: MouseEvent): void;
    /**
     * Handle the `drop` event for the widget.
     */
    protected evtNativeDrop(event: DragEvent): void;
    /**
     * Signal emitted on when all files were uploaded after native drag.
     */
    protected get allUploaded(): ISignal<DirListing, void>;
    /**
     * Handle the `'lm-dragenter'` event for the widget.
     */
    protected evtDragEnter(event: Drag.Event): void;
    /**
     * Handle the `'lm-dragleave'` event for the widget.
     */
    protected evtDragLeave(event: Drag.Event): void;
    /**
     * Handle the `'lm-dragover'` event for the widget.
     */
    protected evtDragOver(event: Drag.Event): void;
    /**
     * Handle the `'lm-drop'` event for the widget.
     */
    protected evtDrop(event: Drag.Event): void;
    /**
     * Start a drag event.
     */
    private _startDrag;
    /**
     * Handle selection on a file node.
     */
    protected handleFileSelect(event: MouseEvent): void;
    /**
     * (Re-)focus an item in the directory listing.
     *
     * @param index The index of the item node to focus
     */
    private _focusItem;
    /**
     * Are all of the items between two provided indices selected?
     *
     * The items at the indices are not considered.
     *
     * @param j Index of one item.
     * @param k Index of another item. Note: may be less or greater than first
     *          index.
     * @returns True if and only if all items between the j and k are selected.
     *          Returns undefined if j and k are the same.
     */
    private _allSelectedBetween;
    /**
     * Handle a multiple select on a file item node.
     */
    private _handleMultiSelect;
    /**
     * Copy the selected items, and optionally cut as well.
     */
    private _copy;
    /**
     * Delete the files with the given paths.
     */
    private _delete;
    /**
     * Allow the user to rename item on a given row.
     */
    private _doRename;
    /**
     * Select a given item.
     */
    private _selectItem;
    /**
     * Handle the `refreshed` signal from the model.
     */
    private _onModelRefreshed;
    /**
     * Handle a `pathChanged` signal from the model.
     */
    private _onPathChanged;
    /**
     * Handle a `fileChanged` signal from the model.
     */
    private _onFileChanged;
    /**
     * Handle an `activateRequested` signal from the manager.
     */
    private _onActivateRequested;
    protected translator: ITranslator;
    protected _model: FilterFileBrowserModel;
    private _trans;
    private _editNode;
    private _items;
    private _sortedItems;
    private _sortState;
    private _handleOpenFile;
    private _onItemOpened;
    private _selectionChanged;
    private _drag;
    private _dragData;
    private _resizeData;
    private _selectTimer;
    private _isCut;
    private _prevPath;
    private _clipboard;
    private _manager;
    private _softSelection;
    protected selection: {
        [key: string]: boolean;
    };
    private _renderer;
    private _searchPrefix;
    private _searchPrefixTimer;
    private _inRename;
    private _isDirty;
    private _hiddenColumns;
    private _columnSizes;
    private _sortNotebooksFirst;
    private _allowSingleClick;
    private _allowDragDropUpload;
    private _focusIndex;
    private _modifiedWidth;
    private _modifiedStyle;
    private _allUploaded;
    private _width;
    private _state;
    private _contentScrollbarWidth;
    private _contentSizeObserver;
    private _paddingWidth;
    private _handleWidth;
    private _lastRenderedState;
}
/**
 * The namespace for the `DirListing` class statics.
 */
export declare namespace DirListing {
    /**
     * An options object for initializing a file browser directory listing.
     */
    export interface IOptions {
        /**
         * A file browser model instance.
         */
        model: FilterFileBrowserModel;
        /**
         * A renderer for file items.
         *
         * The default is a shared `Renderer` instance.
         */
        renderer?: IRenderer;
        /**
         * A language translator.
         */
        translator?: ITranslator;
        /**
         * An optional state database. If provided, the widget will restore
         * the columns sizes
         */
        state?: IStateDB;
        /**
         * Whether to allow drag and drop upload of files.
         * The default is `true`.
         */
        allowDragDropUpload?: boolean;
        /**
         * Callback overriding action performed when user asks to open a file.
         * The default is to open the file in the main area if it is not open already, or to reveal it otherwise.
         */
        handleOpenFile?: (path: string) => void;
    }
    /**
     * A sort state.
     */
    export interface ISortState {
        /**
         * The direction of sort.
         */
        direction: 'ascending' | 'descending';
        /**
         * The sort key.
         */
        key: SortableColumn;
    }
    /**
     * Toggleable columns.
     */
    export type ToggleableColumn = 'last_modified' | 'is_selected' | 'file_size';
    /**
     * Resizable columns.
     */
    export type ResizableColumn = 'name' | 'last_modified' | 'file_size';
    /**
     * Sortable columns.
     */
    export type SortableColumn = 'name' | 'last_modified' | 'file_size';
    /**
     * A file contents model thunk.
     *
     * Note: The content of the model will be empty.
     * To get the contents, call and await the `withContent`
     * method.
     */
    export interface IContentsThunk {
        /**
         * The contents model.
         */
        model: Contents.IModel;
        /**
         * Fetches the model with contents.
         */
        withContent: () => Promise<Contents.IModel>;
    }
    /**
     * The render interface for file browser listing options.
     */
    export interface IRenderer {
        /**
         * Create the DOM node for a dir listing.
         */
        createNode(): HTMLElement;
        /**
         * Populate and empty header node for a dir listing.
         *
         * @param node - The header node to populate.
         */
        populateHeaderNode(node: HTMLElement, translator?: ITranslator, hiddenColumns?: Set<DirListing.ToggleableColumn>, columnsSizes?: Record<IColumn['id'], number | null>): void;
        /**
         * Handle a header click.
         *
         * @param node - A node populated by [[populateHeaderNode]].
         *
         * @param event - A click event on the node.
         *
         * @returns The sort state of the header after the click event.
         */
        handleHeaderClick(node: HTMLElement, event: MouseEvent): ISortState | null;
        /**
         * Create a new item node for a dir listing.
         *
         * @returns A new DOM node to use as a content item.
         */
        createItemNode(hiddenColumns?: Set<DirListing.ToggleableColumn>, columnsSizes?: Record<IColumn['id'], number | null>): HTMLElement;
        /**
         * Update an item's last modified date.
         *
         * @param modified - Element containing the file's last modified date.
         *
         * @param modifiedDate - String representation of the last modified date.
         *
         * @param modifiedStyle - The date style for the modified column: narrow, short, or long
         */
        updateItemModified?(modified: HTMLElement, modifiedDate: string, modifiedStyle: Time.HumanStyle): void;
        /**
         * Update an item node to reflect the current state of a model.
         *
         * @param node - A node created by [[createItemNode]].
         *
         * @param model - The model object to use for the item state.
         *
         * @param modifiedStyle - The date style for the modified column: narrow, short, or long
         *
         * @param fileType - The file type of the item, if applicable.
         */
        updateItemNode(node: HTMLElement, model: Contents.IModel, fileType?: DocumentRegistry.IFileType, translator?: ITranslator, hiddenColumns?: Set<DirListing.ToggleableColumn>, selected?: boolean, modifiedStyle?: Time.HumanStyle, columnsSizes?: Record<IColumn['id'], number | null>): void;
        /**
         * Update size of item nodes, assuming that model has not changed.
         */
        updateItemSize?(node: HTMLElement, model: Contents.IModel, modifiedStyle?: Time.HumanStyle, columnsSizes?: Record<IColumn['id'], number | null>): void;
        /**
         * Get the node containing the file name.
         *
         * @param node - A node created by [[createItemNode]].
         *
         * @returns The node containing the file name.
         */
        getNameNode(node: HTMLElement): HTMLElement;
        /**
         * Get the checkbox input element node.
         *
         * Downstream interface implementations,such as jupyterlab-unfold, that
         * don't support checkboxes should simply always return null for this
         * function.
         *
         * @param node A node created by [[createItemNode]] or
         * [[createHeaderItemNode]]
         *
         * @returns The checkbox node.
         */
        getCheckboxNode: (node: HTMLElement) => HTMLInputElement | null;
        /**
         * Create an appropriate drag image for an item.
         *
         * @param node - A node created by [[createItemNode]].
         *
         * @param count - The number of items being dragged.
         *
         * @param fileType - The file type of the item, if applicable.
         *
         * @returns An element to use as the drag image.
         */
        createDragImage(node: HTMLElement, count: number, trans: TranslationBundle, fileType?: DocumentRegistry.IFileType): HTMLElement;
    }
    interface IBaseColumn {
        /**
         * Name of the header class, must be unique among other columns.
         */
        className: string;
        /**
         * Name of the item class, must be unique among other columns.
         */
        itemClassName: string;
        /**
         * Minimum size the column should occupy.
         */
        minWidth: number;
        /**
         * Unitless number representing the proportion by which the column
         * should grow when the listing is resized.
         */
        grow: number;
    }
    interface IFixedColumn extends IBaseColumn {
        id: 'is_selected';
        resizable: false;
        sortable: false;
        grow: 0;
    }
    /**
     * Sortable column.
     */
    export interface ISortableColumn extends IBaseColumn {
        id: SortableColumn;
        sortable: true;
        caretSide: 'left' | 'right';
    }
    /**
     * Resizable column.
     */
    export interface IResizableColumn extends IBaseColumn {
        id: ResizableColumn;
        resizable: true;
    }
    /**
     * Columns types supported by DirListing.
     */
    export type IColumn = IFixedColumn | ISortableColumn | IResizableColumn | (ISortableColumn & IResizableColumn);
    /**
     * Column definitions.
     */
    export const columns: IColumn[];
    /**
     * The default implementation of an `IRenderer`.
     */
    export class Renderer implements IRenderer {
        /**
         * Create the DOM node for a dir listing.
         */
        createNode(): HTMLElement;
        /**
         * Populate and empty header node for a dir listing.
         *
         * @param node - The header node to populate.
         */
        populateHeaderNode(node: HTMLElement, translator?: ITranslator, hiddenColumns?: Set<DirListing.ToggleableColumn>, columnsSizes?: Record<DirListing.IColumn['id'], number | null>): void;
        /**
         * Handle a header click.
         *
         * @param node - A node populated by [[populateHeaderNode]].
         *
         * @param event - A click event on the node.
         *
         * @returns The sort state of the header after the click event.
         */
        handleHeaderClick(node: HTMLElement, event: MouseEvent): ISortState | null;
        /**
         * Create a new item node for a dir listing.
         *
         * @returns A new DOM node to use as a content item.
         */
        createItemNode(hiddenColumns?: Set<DirListing.ToggleableColumn>, columnsSizes?: Record<DirListing.IColumn['id'], number | null>): HTMLElement;
        /**
         * Creates a node containing a checkbox.
         *
         * We wrap the checkbox in a label element in order to increase its hit
         * area. This is because the padding of the checkbox itself cannot be
         * increased via CSS, as the CSS/form compatibility table at the following
         * url from MDN shows:
         * https://developer.mozilla.org/en-US/docs/Learn/Forms/Property_compatibility_table_for_form_controls#check_boxes_and_radio_buttons
         *
         * @param [options]
         * @params options.alwaysVisible Should the checkbox be visible even when
         * not hovered?
         * @returns A new DOM node that contains a checkbox.
         */
        createCheckboxWrapperNode(options?: {
            alwaysVisible: boolean;
            headerNode?: boolean;
        }): HTMLElement;
        /**
         * Update an item's last modified date.
         *
         * @param modified - Element containing the file's last modified date.
         *
         * @param modifiedDate - String representation of the last modified date.
         *
         * @param modifiedStyle - The date style for the modified column: narrow, short, or long
         */
        updateItemModified(modified: HTMLElement, modifiedDate: string, modifiedStyle: Time.HumanStyle): void;
        /**
         * Update an item node to reflect the current state of a model.
         *
         * @param node - A node created by [[createItemNode]].
         *
         * @param model - The model object to use for the item state.
         *
         * @param fileType - The file type of the item, if applicable.
         *
         */
        updateItemNode(node: HTMLElement, model: Contents.IModel, fileType?: DocumentRegistry.IFileType, translator?: ITranslator, hiddenColumns?: Set<DirListing.ToggleableColumn>, selected?: boolean, modifiedStyle?: Time.HumanStyle, columnsSizes?: Record<DirListing.IColumn['id'], number | null>): void;
        /**
         * Update size of item nodes, assuming that model has not changed.
         */
        updateItemSize(node: HTMLElement, model: Contents.IModel, modifiedStyle?: Time.HumanStyle, columnsSizes?: Record<DirListing.IColumn['id'], number | null>): void;
        /**
         * Get the node containing the file name.
         *
         * @param node - A node created by [[createItemNode]].
         *
         * @returns The node containing the file name.
         */
        getNameNode(node: HTMLElement): HTMLElement;
        /**
         * Get the checkbox input element node.
         *
         * @param node A node created by [[createItemNode]] or
         * [[createHeaderItemNode]]
         *
         * @returns The checkbox node.
         */
        getCheckboxNode(node: HTMLElement): HTMLInputElement | null;
        /**
         * Create a drag image for an item.
         *
         * @param node - A node created by [[createItemNode]].
         *
         * @param count - The number of items being dragged.
         *
         * @param fileType - The file type of the item, if applicable.
         *
         * @returns An element to use as the drag image.
         */
        createDragImage(node: HTMLElement, count: number, trans: TranslationBundle, fileType?: DocumentRegistry.IFileType): HTMLElement;
        /**
         * Factories for individual parts of the item.
         */
        protected itemFactories: {
            name: () => HTMLSpanElement;
            last_modified: () => HTMLSpanElement;
            file_size: () => HTMLSpanElement;
            is_selected: () => HTMLElement;
        };
        /**
         * Create a node for a header item.
         */
        protected createHeaderItemNode(label: string): HTMLElement;
        /**
         * Create a node for a header item with multiple sizes.
         */
        private _createHeaderItemNodeWithSizes;
        /**
         * Register of most recent arguments for last modified column update.
         */
        private _modifiedColumnLastUpdate;
        private _lastRenderedState;
    }
    /**
     * The default `IRenderer` instance.
     */
    export const defaultRenderer: Renderer;
    export {};
}
/**
 * Format bytes to human readable string.
 */
export declare function formatFileSize(bytes: number, decimalPoint: number, k: number): string;