Function createTableStateStore

packages/core/src/runtime/localState.ts:364–394

()

/** Create a new table state store instance. */
export function createTableStateStore(): TableStateStore {
  const table = new Map<string, TableLocalState>();

  return Object.freeze({
    get: (id) => table.get(id) ?? DEFAULT_TABLE_STATE,
    set: (id, patch) => {
      const prev = table.get(id) ?? DEFAULT_TABLE_STATE;
      const next: TableLocalState = Object.freeze({
        scrollTop: patch.scrollTop !== undefined ? patch.scrollTop : prev.scrollTop,
        focusedRowIndex:
          patch.focusedRowIndex !== undefined ? patch.focusedRowIndex : prev.focusedRowIndex,
        focusedColumnIndex:
          patch.focusedColumnIndex !== undefined
            ? patch.focusedColumnIndex
            : prev.focusedColumnIndex,
        lastClickedKey:
          patch.lastClickedKey !== undefined ? patch.lastClickedKey : prev.lastClickedKey,
        viewportHeight:
          patch.viewportHeight !== undefined ? patch.viewportHeight : prev.viewportHeight,
        startIndex: patch.startIndex !== undefined ? patch.startIndex : prev.startIndex,
        endIndex: patch.endIndex !== undefined ? patch.endIndex : prev.endIndex,
      });
      table.set(id, next);
      return next;
    },
    delete: (id) => {
      table.delete(id);
    },
    keys: () => table.keys(),
  });
}

/* ========== Tree State Store (GitHub issue #122) ========== */