/**
 * Interface for ShellBar search controllers.
 */
export interface IShellBarSearchController {
    /**
     * Subscribe to search field events.
     */
    subscribe(): void;
    /**
     * Unsubscribe from search field events.
     */
    unsubscribe(): void;
    /**
     * Auto-collapse or expand search based on available space.
     * @param hiddenItems Number of items currently hidden due to overflow
     * @param availableSpace Available space in pixels (spacer width)
     */
    autoManageSearchState(hiddenItems: number, availableSpace: number): void;
    /**
     * Sync component state (showSearchField) to search field.
     */
    syncShowSearchFieldState(): void;
    /**
     * Check if full-screen search should be shown.
     * Returns true when shellbar is overflowing AND search is visible.
     */
    shouldShowFullScreen(): boolean;
}