import type { PanelNavGroup, PanelNavItem } from './panel-nav-types';
import { NAV_STYLE_HINT_ATTR, clearNavStyleHint, readNavStyleAttr, resolveNavChromeStyle, setNavStyleHint, shouldResyncNavChromeStyle } from '../../shell/nav-chrome';
export type { NavChromeStyle } from '../../shell/nav-chrome';
export { NAV_STYLE_HINT_ATTR, readNavStyleAttr, setNavStyleHint, clearNavStyleHint, resolveNavChromeStyle as resolvePanelNavStyle, shouldResyncNavChromeStyle as shouldResyncPanelNavStyle, };
/** Whether `path` matches `href` at a segment boundary (exact or child path). */
export declare function hrefMatchesPath(path: string, href: string): boolean;
/** Derive the active nav item id from a URL using longest segment-boundary prefix match. */
export declare function deriveActiveIdFromUrl(path: string, items: PanelNavItem[]): string;
/** Total nav item count across all groups. */
export declare function countPanelNavItems(groups: PanelNavGroup[]): number;
/** Resolve a user toggle without mutating the persisted desktop preference while breakpoint-locked. */
export declare function resolvePanelNavToggle(collapsed: boolean, viewportNarrow: boolean): boolean | null;
export interface PanelNavTransitionStyle {
    transitionProperty: string;
    transitionDuration: string;
    transitionDelay: string;
}
/**
 * Maximum computed time for PanelNav's width transition. CSS repeats shorter
 * duration/delay lists to match the property list, so mirror that behavior.
 */
export declare function panelNavWidthTransitionMs(style: PanelNavTransitionStyle): number;
/** Parse `groups` from either a JSON attribute string or a JS property array. */
export declare function parsePanelNavGroups(groups: string | unknown): PanelNavGroup[];
/** Resolve whether VT is disabled from prop and/or host attribute. */
export declare function resolvePanelNavDisableVt(prop: boolean, attr: string | null): boolean;
/** True when host `groups` has items but internal parsed state is still empty. */
export declare function shouldResyncPanelNavGroups(parsedGroups: PanelNavGroup[], groups: string | unknown): boolean;
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