import { type JSX, type ReactNode, type RefObject, type SetStateAction } from 'react';
import { WebView } from 'react-native-webview';
import type { Marker } from '@edgepdf/types';
import type { InboundMessages } from './bridge-types';
export interface ViewerContextValue {
    /** Ref attached to the underlying WebView — set by EdgePDFViewer. */
    webViewRef: RefObject<WebView | null>;
    /** True after the web runtime emits PDF_MAP_READY. */
    isReady: boolean;
    /** Markers currently tracked by the viewer (synced from bridge events). */
    markers: Marker[];
    /** Current map zoom level (updated on VIEW_CHANGED). */
    zoom: number | null;
    /** Current map center [lat, lng] (updated on VIEW_CHANGED). */
    center: [number, number] | null;
    /** Whether the viewer is in fullscreen mode. */
    isFullscreen: boolean;
    /**
     * Marker icon names the loaded `viewer.html` can render, reported on
     * PDF_MAP_READY. Empty until then, and empty against a viewer build that
     * predates the feature — treat empty as "unknown", not as "none".
     */
    availableMarkerIcons: string[];
    /** Toggle fullscreen mode (registered by the viewer component). */
    toggleFullscreen?: () => void;
    /**
     * Send a typed message into the web runtime running inside the WebView.
     * Safe to call before the WebView loads — the call is silently ignored
     * if the ref is not yet attached.
     */
    postToWebView: <K extends keyof InboundMessages>(type: K, payload: InboundMessages[K]) => void;
    /**
     * @internal — Used by EdgePDFViewer to sync state from bridge messages.
     * Accepts a plain value or a functional updater for `markers`.
     */
    _update: (updates: {
        isReady?: boolean;
        markers?: SetStateAction<Marker[]>;
        zoom?: number | null;
        center?: [number, number] | null;
        isFullscreen?: boolean;
        toggleFullscreen?: () => void;
        availableMarkerIcons?: string[];
    }) => void;
}
export interface ViewerProviderProps {
    children: ReactNode;
}
/**
 * ViewerProvider — wraps a screen or subtree that contains one EdgePDFViewer.
 *
 * Create one provider per viewer instance. Hooks (`useViewer`, `useMarkers`,
 * `useZoom`) must be consumed within this provider.
 *
 * @example
 * ```tsx
 * <ViewerProvider>
 *   <EdgePDFViewer imageInfo={imageInfo} offlineReader={reader} />
 *   <MyToolbar />
 * </ViewerProvider>
 * ```
 */
export declare function ViewerProvider({ children }: ViewerProviderProps): JSX.Element;
/**
 * Access the raw viewer context.
 *
 * Prefer the specialised hooks (`useViewer`, `useMarkers`, `useZoom`)
 * unless you need direct context access.
 *
 * @throws {Error} When used outside a ViewerProvider.
 */
export declare function useViewerContext(): ViewerContextValue;
//# sourceMappingURL=viewer-context.d.ts.map