import { type Ref } from 'vue';
import { type AnnotationPluginApi, type Annotation } from '@vue-pdf-viewer/shared';
import type { PDFDocumentProxy, PDFPageProxy } from 'pdfjs-dist/types/src/display/api';
/**
 * Set the global annotation plugin API reference
 * Called from usePlugins when the plugin is registered
 */
export declare const setGlobalAnnotationPluginApi: (api: AnnotationPluginApi | null) => void;
/**
 * Annotation Storage Composable with Automatic Save Support
 *
 * This composable provides a centralized way to manage PDF annotations with automatic
 * saving capabilities. It tracks modifications and can automatically save annotations
 * to the PDF document before operations like print and download.
 *
 * Key Features:
 * - Tracks annotation modifications automatically
 * - Provides methods to save annotations before print/download
 * - Supports batch updates for better performance
 * - Maintains reactivity across components
 * - Returns updated PDF data for download operations
 *
 * Usage:
 * ```typescript
 * const {
 *   annotationStorage,
 *   hasModifications,
 *   saveAnnotationsToDocument,
 *   setAnnotationValue,
 *   batchUpdate
 * } = useAnnotationStorage()
 *
 * // Set individual annotation
 * setAnnotationValue('annotationId', { color: [255, 0, 0], noView: true })
 *
 * // Batch update multiple annotations
 * batchUpdate([
 *   { key: 'id1', value: { color: [255, 0, 0] } },
 *   { key: 'id2', value: { noView: true } }
 * ])
 *
 * // Save before print/download (returns updated PDF data)
 * if (hasModifications()) {
 *   const updatedPdfData = await saveAnnotationsToDocument(pdfDocument)
 *   // Use updatedPdfData for download operations
 * }
 * ```
 */
export interface UseAnnotationStorageReturn {
    annotationStorage: Ref<any>;
    annotationEditorStorageMap: Ref<Map<string, any>>;
    setStorage: (documentProxy: PDFDocumentProxy) => any;
    batchUpdate: (updates: Array<{
        key: string;
        value: any;
    }>) => void;
    setAnnotationValue: (key: string, value: any, serialized?: boolean) => void;
    hasModifications: () => boolean;
    /** Save all annotations including underline/strikethrough (main entry point) */
    saveAnnotationsToDocument: (documentProxy: PDFDocumentProxy) => Promise<Uint8Array | null>;
    /** Save only regular PDF.js annotations (Highlight, FreeText, Stamp, Widget) */
    saveAnnotationsToDocumentSimplified: (documentProxy: PDFDocumentProxy) => Promise<Uint8Array | null>;
    cleanAnnotationStorage: () => void;
    validateAnnotationData: (annotationData: any) => boolean;
    renderTrigger: Ref<number>;
    canvasRenderTrigger: Ref<number>;
    cancelBatchUpdate: () => void;
    /** Bulk-insert parsed annotations into the editor storage map. Returns generated keys. */
    bulkImportAnnotations: (annotations: Annotation[]) => string[];
    /** Remove all editor annotations from storage. Returns count of cleared entries. */
    clearAllAnnotations: () => number;
    /** The active annotation plugin API, or null when the plugin is not loaded. */
    pluginApi: Ref<AnnotationPluginApi | null>;
    ensureStorageInitialized: () => boolean;
    getEditorKey: () => string;
    getAnnotationById: (id: string) => any;
    findEditorAnnotationKey: (annotationId: string) => string | undefined;
}
export declare const getGlobalStorageEntries: () => unknown[];
/**
 * Pre-set noView flag for Underline/StrikeOut annotations before canvas rendering.
 * This prevents race condition where canvas renders these annotations before
 * LayerAnnotationEditor has a chance to hide them.
 *
 * Why this is needed:
 * - Highlight annotations are supported by PDF.js for editing, so they respond to isEditing flag
 * - Underline (type 10) and StrikeOut (type 12) are NOT supported by PDF.js for editing
 * - PDF.js renders them on canvas but does NOT respond to isEditing flag
 * - We need to set noView: true BEFORE canvas rendering starts
 */
export declare function prepareTextMarkupAnnotationsForCanvas(pageProxy: PDFPageProxy, isTextSelectionActive: boolean): Promise<void>;
/**
 * Creates a serializable version of the annotation data
 * @param value - The annotation data to serialize
 * @returns A serializable version of the annotation data
 */
export declare function createSerializableAnnotation(value: any): Promise<any>;
export default function useAnnotationStorage(): UseAnnotationStorageReturn;