import { Thumbnails } from './thumbnails';
import { Outline } from './outline';
import { Search } from './search';
/** The side panels, all of which share the one rail beside the book. */
declare const PANELS: {
    thumbnails: typeof Thumbnails;
    outline: typeof Outline;
    search: typeof Search;
};
type PanelKind = keyof typeof PANELS;
import type { ControlsOptions } from './types';
import type { Zine } from '../zine';
export declare class Toolbar {
    #private;
    constructor(zine: Zine, container: HTMLElement, options: ControlsOptions, hidden?: ReadonlySet<string>);
    /** Build the layout. Separate from construction so instance-bound widgets (the page field, the
     *  search panel) can be registered against this toolbar first. */
    mount(options: ControlsOptions): void;
    destroy(): void;
    /** Registered lazily by {@link registerWidgets} so the widget can reach this instance. */
    makePageInput(): HTMLElement;
    /** Which side panel is showing, if any. */
    openPanel(): PanelKind | null;
    /**
     * Whether this document has a table of contents worth offering.
     *
     * Many PDFs have none, and a control that can only report its own emptiness is a dead end, so
     * the outline button stays hidden until the outline is known to be non-empty. The first call
     * kicks off the lookup and refreshes the toolbar when it lands; `Zine.getOutline` memoizes, so
     * the panel does not pay for it twice.
     */
    hasOutline(): boolean;
    /**
     * Show one of the side panels, or close it if it is already up. They share the rail beside the
     * book, so opening one closes the others. Rebuilt each time, so the thumbnail rail always
     * matches the current spread grouping (which `spreadMode` and the responsive fallback change).
     */
    togglePanel(kind: PanelKind): void;
}
/**
 * Controls that need the toolbar itself (a DOM widget, or a panel to open) are registered per
 * instance, since the registry is module-level and shared.
 */
export declare function registerWidgets(toolbar: Toolbar): void;
export {};