import type { PageTreeDoc } from './pageTree.js';
export type PageTreeInsertDropTarget = {
    depth: number;
    dropID: string;
    dropType: 'insert';
    parentID: null | string;
    referenceRowID: string;
};
export type PageTreeRowDropTarget = {
    dropType: 'row';
    insertAfterDropID: null | string;
    insertBeforeDropID: null | string;
    rowID: string;
};
export type PageTreeDropTarget = PageTreeInsertDropTarget | PageTreeRowDropTarget;
export type PageTreeOrderPlacement = {
    nextSiblingID: null | string;
    parentID: null | string;
    previousSiblingID: null | string;
};
export declare function buildInsertDropTargets(docs: PageTreeDoc[]): PageTreeInsertDropTarget[];
export declare function getDropTargetParentDoc(args: {
    docsByID: ReadonlyMap<string, PageTreeDoc>;
    dropTarget: null | PageTreeDropTarget;
}): null | PageTreeDoc;
export declare function getOrderPlacementFromDropTarget(args: {
    activeDoc: PageTreeDoc;
    docs: PageTreeDoc[];
    docsByID: ReadonlyMap<string, PageTreeDoc>;
    dropTarget: null | PageTreeDropTarget;
}): null | PageTreeOrderPlacement;