import type { Editor } from '@tiptap/core';
import type { Node as ProseMirrorNode } from '@tiptap/pm/model';
export interface DocumentTextStatistics {
    characterCountWithSpaces: number;
    characterCountWithoutSpaces: number;
    paragraphCount: number;
    wordCount: number;
}
export declare function documentWordCount(value: string): number;
/**
 * Counts a document once per immutable ProseMirror root. Selection, pagination,
 * and viewport transactions retain the same root and therefore stay O(1).
 */
export declare function documentTextStatistics(editor: Pick<Editor, 'getText' | 'state'>): DocumentTextStatistics;
/** Keeps logical statistics unchanged across equal-size lazy hydration. */
export declare function transferDocumentTextStatistics(previous: ProseMirrorNode, next: ProseMirrorNode): void;
/**
 * Applies text-only subtree deltas to an already cached document total. Large
 * lazy documents edit one hydrated chunk at a time, so recounting every
 * placeholder tape would make a local keystroke O(document size).
 */
export declare function transferChangedDocumentTextStatistics(previous: ProseMirrorNode, next: ProseMirrorNode, changes: readonly {
    after: ProseMirrorNode;
    before: ProseMirrorNode;
}[]): boolean;