import { IBasicFileSystemHost, Root } from 'aspen-core';
import { IDisposable } from 'notificar';
import { ISerializableState, TreeStateManager, TreeStateWatcher } from './treeState';
export declare class TreeModel {
    readonly state: TreeStateManager;
    readonly root: Root;
    private events;
    constructor(host: IBasicFileSystemHost, rootPath: string);
    onChange(callback: () => void): IDisposable;
    /**
     * Restore tree state from given state.
     *
     * Included in TreeState:
     *  - Directory expansion states
     *  - Scroll offset
     *
     * Not included in TreeState:
     *  - Decorations
     *  - Prompts
     *
     * NOTE: ⚠ `loadTreeState` should be called and `await`ed **before** passing the `TreeModel` on to the `<FileTree />` component
     */
    loadTreeState(state: string): any;
    loadTreeState(state: ISerializableState): any;
    /**
     * Returns a `TreeStateWatcher` that will stay in sync with actual tree state at all times
     *
     * Included in TreeState:
     *  - Directory expansion states
     *  - Scroll offset
     *
     * Not included in TreeState:
     *  - Decorations
     *  - Prompts
     *
     * Use `TreeStateWatcher#onChange` to attach a listener for when state is updated.
     *
     * Use `TreeStateWatcher#snapshot` to get snapshot of current tree state (not serialized, but serializable; use `JSON.stringify()`). You can make a time machine with this
     *
     * Use `TreeStateWatcher#toString` to convert the current state into a JSON string. Useful if you want save the current state to be able restore it later
     */
    getTreeStateWatcher(atSurfaceExpandedDirsOnly?: boolean): TreeStateWatcher;
    private dispatchChange;
}