import { MarkdownEditorComment, MarkdownTextChange } from './types';
/**
 * Comment threads hold a source range and the text it covered.
 *
 * Every edit maps the ranges: text typed at either edge stays outside the
 * thread, text typed inside it joins it, and the quote follows the edited
 * text. A range whose text was deleted collapses; it is then detached until
 * `anchorMarkdownComments` finds its quote again (the text was moved, or an
 * undo brought it back).
 */
/** The threads after `changes`, or null when none changed. `doc` is the document after them. */
export declare function mapMarkdownComments(comments: readonly MarkdownEditorComment[], changes: readonly MarkdownTextChange[], doc: string): MarkdownEditorComment[] | null;
/** Whether the thread no longer covers any text. */
export declare function isCommentDetached(comment: Pick<MarkdownEditorComment, 'from' | 'to'>): boolean;
/**
 * Checks stored ranges against `doc`, e.g. after the document was replaced
 * or threads were loaded: a range that no longer holds its quote moves to the
 * nearest copy of it, or collapses (detached). Null when nothing changed.
 */
export declare function anchorMarkdownComments(comments: readonly MarkdownEditorComment[], doc: string): MarkdownEditorComment[] | null;