/**
 * ChromeUiState: reactive open/collapsed state for the editing chrome's side
 * panels, mirroring React's `useViewerState` flags (`isSidebarCollapsed`,
 * `isInspectorPaneOpen`, `inspectorTab`). Owned by `PowerPointViewer` and
 * threaded to both the ribbon's primary row (the toggle buttons) and
 * `ViewerBody` (which gates the thumbnail rail and inspector pane on it).
 */
/** The inspector pane's tab strip, matching React's `InspectorTab`. */
export type InspectorTabId = 'elements' | 'properties' | 'comments';
export declare class ChromeUiState {
    /** Left thumbnail rail visibility (React: `isSidebarCollapsed`). */
    sidebarCollapsed: boolean;
    /** Right inspector pane visibility (React: `isInspectorPaneOpen`). */
    inspectorOpen: boolean;
    /** Active inspector tab (React defaults to Properties). */
    inspectorTab: InspectorTabId;
    toggleSidebar(): void;
    toggleInspector(): void;
    setInspectorTab(tab: InspectorTabId): void;
    /** Comments toolbar button: toggle the inspector's Comments tab. */
    toggleComments(): void;
    /** True when the inspector is showing the Comments tab. */
    get commentsOpen(): boolean;
}
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