import { LabIcon } from '@jupyterlab/ui-components';
import type { FileTreeIconConfig } from '@pierre/trees';
/**
 * The glyph used as the xtralab file browser's sidebar tab icon. Defined as a
 * `LabIcon` (rather than the default `folderIcon` from
 * `@jupyterlab/ui-components`) so the xtralab browser is visually distinguishable
 * from JupyterLab's built-in file browser, which also lives in the left
 * sidebar.
 *
 * Source: `file-tree` from SVG Repo (https://www.svgrepo.com/svg/371275/file-tree).
 * The original `fill="#444"` is replaced with `fill="currentColor"` and the
 * root element is given the `jp-icon3` class so the icon picks up JupyterLab's
 * theme color and the sidebar's inverse-color painting automatically.
 */
export declare const xtralabFileBrowserIcon: LabIcon;
/**
 * Icon configuration for the xtralab file browser. Keeps the default `complete`
 * built-in icon set (the colored language icons) and layers a Jupyter notebook
 * symbol on top so `.ipynb` files render with the JupyterLab notebook glyph.
 *
 * `set` must be set explicitly: when a config object includes any custom
 * overrides without `set`, `@pierre/trees` defaults `set` to `'none'`, which
 * disables the built-in icons entirely.
 */
export declare const FILE_BROWSER_ICONS: FileTreeIconConfig;
/**
 * Return the icon the xtralab file tree would render for `filePath`.
 */
export declare function getTreeIcon(filePath: string): LabIcon;
/**
 * Like {@link getTreeIcon}, but returns `null` for the generic file glyph.
 */
export declare function getSpecificTreeIcon(filePath: string): LabIcon | null;