import { Node as PMNode } from 'prosemirror-model';
import { ParagraphDiff, ParagraphNodeInfo } from './paragraph-diffing';
import { AttributesDiff } from './attributes-diffing';
type NodeJSON = ReturnType<PMNode['toJSON']>;
/**
 * Minimal node metadata extracted during document traversal.
 */
export type BaseNodeInfo = {
    /** ProseMirror node reference. */
    node: PMNode;
    /** Absolute position of the node in the document. */
    pos: number;
    /** Depth of the node within the document tree. */
    depth: number;
};
/**
 * Union describing every node processed by the generic diff.
 */
export type NodeInfo = BaseNodeInfo | ParagraphNodeInfo;
interface NodeDiffBase<Action extends 'added' | 'deleted' | 'modified'> {
    /** Change type for this node. */
    action: Action;
    /** ProseMirror node type name. */
    nodeType: string;
    /** Anchor position in the old document for replaying diffs. */
    pos: number;
}
/**
 * Diff payload describing an inserted non-paragraph node.
 */
interface NodeAddedDiff extends NodeDiffBase<'added'> {
    /** Serialized node payload inserted into the document. */
    nodeJSON: NodeJSON;
}
/**
 * Diff payload describing a deleted non-paragraph node.
 */
interface NodeDeletedDiff extends NodeDiffBase<'deleted'> {
    /** Serialized node payload removed from the document. */
    nodeJSON: NodeJSON;
}
/**
 * Diff payload describing an attribute-only change on non-paragraph nodes.
 */
interface NodeModifiedDiff extends NodeDiffBase<'modified'> {
    /** Serialized node payload before the change. */
    oldNodeJSON: NodeJSON;
    /** Serialized node payload after the change. */
    newNodeJSON: NodeJSON;
    /** Attribute-level diff for the node. */
    attrsDiff: AttributesDiff;
}
/**
 * Union of every diff type emitted by the generic diffing layer.
 */
export type NodeDiff = ParagraphDiff | NodeAddedDiff | NodeDeletedDiff | NodeModifiedDiff;
/**
 * Produces a sequence diff between two normalized node lists.
 *
 * @param oldNodes Normalized nodes from the old document.
 * @param newNodes Normalized nodes from the new document.
 * @returns List of node diffs describing the changes.
 */
export declare function diffNodes(oldNodes: NodeInfo[], newNodes: NodeInfo[]): NodeDiff[];
/**
 * Traverses a ProseMirror document and converts paragraphs to richer node info objects.
 */
export declare function normalizeNodes(pmDoc: PMNode): NodeInfo[];
export {};
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