@tanstack/table-core/dist/worker/tableWorkerProtocol.d.ts

Headless UI for building powerful tables & datagrids for TS/JS.

import { RowData } from "../types/type-utils.js";
//#region src/worker/tableWorkerProtocol.d.ts
/**
 * Row model stages that can be offloaded to the worker, in pipeline order.
 * Everything else in this module is derived from this list; adding a stage
 * means adding an entry here and to `tableWorkerStageStateDeps`.
 */
declare const tableWorkerPipeline: readonly ["filtered", "grouped", "sorted", "expanded"];
type TableWorkerStage = (typeof tableWorkerPipeline)[number];
/**
 * The state slices each stage's computation depends on. The main thread sends
 * the union of deps for its registered stages; a change to any of them
 * triggers one worker round trip.
 */
declare const tableWorkerStageStateDeps: Record<TableWorkerStage, Array<string>>;
/**
 * A serialized synthetic (group) row. Leaf rows serialize as their position in
 * `options.data`; group rows carry what `constructRow` + the grouped row model
 * need to rebuild them, plus eagerly computed aggregate values so no
 * aggregation runs on the main thread.
 */
interface TableWorkerGroupNode {
  id: string;
  groupingColumnId: string;
  groupingValue: unknown;
  index: number;
  aggregates: Record<string, unknown>;
  children: Array<TableWorkerRowNode>;
}
type TableWorkerRowNode = number | TableWorkerGroupNode;
/**
 * A stage result. Flat models (every row is a data row) travel as a
 * transferable index permutation; models containing synthetic rows (grouping)
 * travel as a tree. The kind is chosen from the model's actual shape at
 * runtime, not from the stage name: a sorted model is flat without grouping
 * and a tree with it.
 *
 * `unchanged` means the stage's model is identical to the last one sent for
 * this dataset (its memoized inputs did not change); the main thread keeps
 * its previous result and skips the rebuild entirely.
 */
type TableWorkerStagePayload = {
  kind: 'flat';
  indices: Uint32Array;
} | {
  kind: 'tree';
  children: Array<TableWorkerRowNode>;
} | {
  kind: 'unchanged';
};
type TableWorkerRequest<TData extends RowData = any> = {
  type: 'data';
  dataVersion: number;
  data: Array<TData>;
} | {
  type: 'process';
  requestId: number;
  dataVersion: number;
  /** The stages the main thread has worker-backed row models for. */
  stages: Array<TableWorkerStage>;
  /** Serializable state slices (union of the stages' deps). */
  state: Record<string, unknown>;
};
interface TableWorkerResult {
  type: 'result';
  requestId: number;
  dataVersion: number;
  stages: { [K in TableWorkerStage]?: TableWorkerStagePayload; };
  computeMs: number;
}
type TableWorkerResponse = TableWorkerResult;
/**
 * The state slice added by `workerRowModelsFeature`. `version` bumps when a
 * worker result lands (driving re-renders through the normal state path);
 * `isPending` is true while a request is in flight. The timing fields expose
 * the last result's worker compute time and full round trip for devtools and
 * debugging.
 */
interface TableState_WorkerRowModels {
  workerRowModels: {
    version: number;
    isPending: boolean;
    lastComputeMs?: number;
    lastRoundTripMs?: number;
  };
}
//#endregion
export { TableState_WorkerRowModels, TableWorkerGroupNode, TableWorkerRequest, TableWorkerResponse, TableWorkerResult, TableWorkerRowNode, TableWorkerStage, TableWorkerStagePayload, tableWorkerPipeline, tableWorkerStageStateDeps };