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Handles row selection and focusing a grid cell's\n * focusable child if applicable.\n */\nexport function useGridState<T extends object, C extends IGridCollection<T>>(\n  props: GridStateOptions<T, C>\n): GridState<T, C> {\n  let {collection, focusMode} = props;\n  // eslint-disable-next-line react-hooks/rules-of-hooks\n  let selectionState = props.UNSAFE_selectionState || useMultipleSelectionState(props);\n  let disabledKeys = useMemo(\n    () => (props.disabledKeys ? new Set(props.disabledKeys) : new Set<Key>()),\n    [props.disabledKeys]\n  );\n\n  let setFocusedKey = selectionState.setFocusedKey;\n  selectionState.setFocusedKey = (key, child) => {\n    // If focusMode is cell and an item is focused, focus a child cell instead.\n    if (focusMode === 'cell' && key != null) {\n      let item = collection.getItem(key);\n      if (item?.type === 'item') {\n        let children = getChildNodes(item, collection);\n        if (child === 'last') {\n          key = getLastItem(children)?.key ?? null;\n        } else {\n          key = getFirstItem(children)?.key ?? null;\n        }\n      }\n    }\n\n    setFocusedKey(key, child);\n  };\n\n  let selectionManager = useMemo(\n    () => new SelectionManager(collection, selectionState),\n    [collection, selectionState]\n  );\n\n  // Reset focused key if that item is deleted from the collection.\n  const cachedCollection = useRef<C | null>(null);\n  useEffect(() => {\n    if (\n      selectionState.focusedKey != null &&\n      cachedCollection.current &&\n      !collection.getItem(selectionState.focusedKey)\n    ) {\n      const node = cachedCollection.current.getItem(selectionState.focusedKey);\n      const parentNode =\n        node?.parentKey != null &&\n        (node.type === 'cell' || node.type === 'rowheader' || node.type === 'column')\n          ? cachedCollection.current.getItem(node.parentKey)\n          : node;\n      if (!parentNode) {\n        selectionState.setFocusedKey(null);\n        return;\n      }\n      const cachedRows = cachedCollection.current.rows;\n      const rows = collection.rows;\n      const diff = cachedRows.length - rows.length;\n      let index = Math.min(\n        diff > 1 ? Math.max(parentNode.index - diff + 1, 0) : parentNode.index,\n        rows.length - 1\n      );\n      let newRow: GridNode<T> | null = null;\n      while (index >= 0) {\n        if (!selectionManager.isDisabled(rows[index].key) && rows[index].type !== 'headerrow') {\n          newRow = rows[index];\n          break;\n        }\n        // Find next, not disabled row.\n        if (index < rows.length - 1) {\n          index++;\n          // Otherwise, find previous, not disabled row.\n        } else {\n          if (index > parentNode.index) {\n            index = parentNode.index;\n          }\n          index--;\n        }\n      }\n      if (newRow) {\n        const childNodes = newRow.hasChildNodes ? [...getChildNodes(newRow, collection)] : [];\n        const keyToFocus =\n          newRow.hasChildNodes && parentNode !== node && node && node.index < childNodes.length\n            ? childNodes[node.index].key\n            : newRow.key;\n        selectionState.setFocusedKey(keyToFocus);\n      } else {\n        selectionState.setFocusedKey(null);\n      }\n    }\n    cachedCollection.current = collection;\n  }, [collection, selectionManager, selectionState, selectionState.focusedKey]);\n\n  return {\n    collection,\n    disabledKeys,\n    isKeyboardNavigationDisabled: false,\n    selectionManager\n  };\n}\n"],"names":[],"version":3,"file":"useGridState.mjs.map"}