import type { AcUiToolbarItem } from './types';
/** One selectable entry in a toolbar layout switcher submenu. */
export interface AcUiToolbarLayoutPreset {
    /** Stable preset identifier. */
    id: string;
    /** Display label for the submenu entry. */
    label: string;
}
/** Options for {@link acuiCreateToolbarLayoutSwitcher}. */
export interface AcUiToolbarLayoutSwitcherOptions {
    /** Presets shown in the submenu. */
    presets: AcUiToolbarLayoutPreset[];
    /** Id of the currently active preset. */
    currentId: string;
    /** Invoked when the user selects a preset. */
    onSelect: (presetId: string) => void;
    /** Toolbar button id. @default 'toolbar-layout-switcher' */
    id?: string;
    /** Button tooltip / aria label. @default 'Toolbar Layout' */
    label?: string;
    /** Inline SVG icon string. */
    icon?: string;
}
/**
 * Creates a submenu button that switches between fully custom toolbar layouts.
 *
 * Pair with {@link AcApSimpleUiPlugin.setToolbarItems} so each preset replaces the
 * entire toolbar `items` list rather than using `appendItems`.
 *
 * @param options - Presets, current selection, and selection handler.
 */
export declare function acuiCreateToolbarLayoutSwitcher(options: AcUiToolbarLayoutSwitcherOptions): AcUiToolbarItem;
/**
 * Prepends a layout switcher and separator before a fully custom toolbar item list.
 *
 * @param items - Toolbar items for the active preset (not including the switcher).
 * @param switcher - Layout switcher button from {@link acuiCreateToolbarLayoutSwitcher}.
 */
export declare function acuiPrependToolbarLayoutSwitcher(items: AcUiToolbarItem[], switcher: AcUiToolbarItem): AcUiToolbarItem[];
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