import type { PagePlacement, PagePlacementOperation } from '@pdfrx/viewer-core';
/**
 * Creates an absolute rotation command from a relative clockwise delta.
 *
 * @param page - The page to process.
 * @param delta - The amount of change to apply.
 * @returns The resulting PagePlacementOperation.
 *
 */
export declare function rotatePlacement(page: PagePlacement, delta: 90 | 180 | 270): PagePlacementOperation;
/**
 * Inserts an independently addressable copy immediately after the source placement.
 *
 * @param page - The page to process.
 * @param placementId - The stable placement identifier.
 * @returns The resulting PagePlacementOperation.
 *
 */
export declare function duplicatePlacement(page: PagePlacement, placementId: string): PagePlacementOperation;
/**
 * Converts the thumbnail list's `(fromPageNumber, toIndex)` drop coordinates
 * into a stable placement-ID move. Returns `null` for an unchanged position.
 * @param pages - The pages to process, in document order.
 * @param fromPageNumber - The from page number.
 * @param toIndex - The 0-based to index.
 * @returns The resulting page operation, or `null` when no move is needed.
 *
 */
export declare function movePlacementToIndex(pages: readonly PagePlacement[], fromPageNumber: number, toIndex: number): PagePlacementOperation | null;
/**
 * Returns a compact human-readable operation label for an activity log.
 *
 * @param operation - The operation to apply.
 * @returns The resulting string.
 *
 */
export declare function describePageOperation(operation: PagePlacementOperation): string;
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