import type { ToolbarRegistry } from '@jupyterlab/apputils';
import type { IObservableList } from '@jupyterlab/observables';
import type { VDomRenderer } from '@jupyterlab/ui-components';
import type { JSONObject } from '@lumino/coreutils';
import { Token } from '@lumino/coreutils';
import type { IDisposable } from '@lumino/disposable';
import type { ISignal } from '@lumino/signaling';
import type { Widget } from '@lumino/widgets';
/**
 * Interface describing the table of contents registry.
 */
export interface ITableOfContentsRegistry {
    /**
     * Finds a table of contents model for a widget.
     *
     * ## Notes
     *
     * -   If unable to find a table of contents model, the method return `undefined`.
     *
     * @param widget - widget
     * @param configuration - Table of contents configuration
     * @returns Table of contents model or undefined if not found
     */
    getModel(widget: Widget, configuration?: TableOfContents.IConfig): TableOfContents.Model | undefined;
    /**
     * Adds a table of contents factory to the registry.
     *
     * @param factory - table of contents factory
     */
    add(factory: TableOfContents.IFactory): IDisposable;
}
/**
 * Table of contents registry token.
 */
export declare const ITableOfContentsRegistry: Token<ITableOfContentsRegistry>;
/**
 * Interface for the table of contents tracker
 */
export interface ITableOfContentsTracker {
    /**
     * Get the model associated with a given widget.
     *
     * @param widget Widget
     */
    get(widget: Widget): TableOfContents.IModel<TableOfContents.IHeading> | null;
}
/**
 * Table of contents tracker token.
 */
export declare const ITableOfContentsTracker: Token<ITableOfContentsTracker>;
/**
 * Namespace for table of contents interface
 */
export declare namespace TableOfContents {
    /**
     * Table of content model factory interface
     */
    interface IFactory<W extends Widget = Widget, H extends IHeading = IHeading> {
        /**
         * Whether the factory can handle the widget or not.
         *
         * @param widget - widget
         * @returns boolean indicating a ToC can be generated
         */
        isApplicable: (widget: W) => boolean;
        /**
         * Create a new table of contents model for the widget
         *
         * @param widget - widget
         * @param configuration - Table of contents configuration
         * @returns The table of contents model
         */
        createNew: (widget: W, configuration?: TableOfContents.IConfig) => IModel<H>;
    }
    /**
     * Table of Contents configuration
     *
     * #### Notes
     * A document model may ignore some of those options.
     */
    interface IConfig extends JSONObject {
        /**
         * Base level for the highest headings
         */
        baseNumbering: number;
        /**
         * Maximal depth of headings to display
         */
        maximalDepth: number;
        /**
         * Whether to number first-level headings or not.
         */
        numberingH1: boolean;
        /**
         * Whether to number headings in document or not.
         */
        numberHeaders: boolean;
        /**
         * Whether to include cell outputs in headings or not.
         */
        includeOutput: boolean;
        /**
         * Whether to synchronize heading collapse state between the ToC and the document or not.
         */
        syncCollapseState: boolean;
    }
    /**
     * Default table of content configuration
     */
    const defaultConfig: IConfig;
    /**
     * Interface describing a heading.
     */
    interface IHeading {
        /**
         * Heading text.
         */
        text: string;
        /**
         * HTML heading level.
         */
        level: number;
        /**
         * Heading prefix.
         */
        prefix?: string | null;
        /**
         * Dataset to add to the item node
         */
        dataset?: Record<string, string>;
        /**
         * Whether the heading is collapsed or not
         */
        collapsed?: boolean;
        /**
         * Whether the heading is marked to skip or not
         */
        skip?: boolean;
    }
    /**
     * Interface describing a widget table of contents model.
     */
    interface IModel<H extends IHeading> extends VDomRenderer.IModel {
        /**
         * Active heading
         */
        readonly activeHeading: H | null;
        /**
         * Signal emitted when the active heading changes.
         */
        readonly activeHeadingChanged: ISignal<IModel<H>, H | null>;
        /**
         * Signal emitted when a table of content section collapse state changes.
         *
         * If all headings state are set at the same time, the argument is null.
         */
        readonly collapseChanged: ISignal<IModel<H>, H | null>;
        /**
         * Model configuration
         */
        readonly configuration: IConfig;
        /**
         * Type of document supported by the model.
         *
         * #### Notes
         * A `data-document-type` attribute with this value will be set
         * on the tree view `.jp-TableOfContents-content[data-document-type="..."]`
         */
        readonly documentType: string;
        /**
         * Returns the list of headings.
         *
         * @returns list of headings
         */
        readonly headings: H[];
        /**
         * Signal emitted when the headings changes.
         */
        readonly headingsChanged: ISignal<IModel<H>, void>;
        /**
         * Whether the model needs to be kept up to date or not.
         *
         * ### Notes
         * This is set to `true` if the ToC panel is visible and
         * to `false` if it is hidden. But some models may require
         * to be always active; e.g. to add numbering in the document.
         */
        isActive: boolean;
        /**
         * Set a new active heading.
         *
         * @param heading The new active heading
         * @param emitSignal Whether to emit the activeHeadingChanged signal or not.
         */
        setActiveHeading(heading: H | null, emitSignal?: boolean): void;
        /**
         * Model configuration setter.
         *
         * @param c New configuration
         */
        setConfiguration(c: Partial<IConfig>): void;
        /**
         * List of configuration options supported by the model.
         */
        readonly supportedOptions: (keyof IConfig)[];
        /**
         * Document title
         */
        title?: string;
        /**
         * Callback on heading collapse.
         *
         * @param options.heading The heading to change state (all headings if not provided)
         * @param options.collapsed The new collapsed status (toggle existing status if not provided)
         */
        toggleCollapse: (options: {
            heading?: H;
            collapsed?: boolean;
        }) => void;
    }
    /**
     * Generic table of contents type
     */
    type Model = IModel<IHeading>;
    /**
     * Interface describing table of contents widget options.
     */
    interface IOptions {
        /**
         * Table of contents model.
         */
        model?: IModel<IHeading>;
        /**
         * If no headings are present, a headline to display as a placeholder
         */
        placeholderHeadline: string;
        /**
         * If no headings are present, text to display as a placeholder
         */
        placeholderText: string;
    }
    /**
     * Interface describing a toolbar item list
     */
    interface IToolbarItems extends IObservableList<ToolbarRegistry.IToolbarItem> {
    }
}