@wordpress/block-library/build-module/navigation/edit/use-inner-blocks.js

Block library for the WordPress editor.

/**
 * WordPress dependencies
 */
import { useSelect } from '@wordpress/data';
import { store as blockEditorStore } from '@wordpress/block-editor';
const EMPTY_ARRAY = [];
export function useInnerBlocks(clientId) {
  return useSelect(select => {
    const {
      getBlock,
      getBlocks,
      hasSelectedInnerBlock
    } = select(blockEditorStore); // This relies on the fact that `getBlock` won't return controlled
    // inner blocks, while `getBlocks` does. It might be more stable to
    // introduce a selector like `getUncontrolledInnerBlocks`, just in
    // case `getBlock` is fixed.

    const _uncontrolledInnerBlocks = getBlock(clientId).innerBlocks;

    const _hasUncontrolledInnerBlocks = !!(_uncontrolledInnerBlocks !== null && _uncontrolledInnerBlocks !== void 0 && _uncontrolledInnerBlocks.length);

    const _controlledInnerBlocks = _hasUncontrolledInnerBlocks ? EMPTY_ARRAY : getBlocks(clientId);

    return {
      innerBlocks: _hasUncontrolledInnerBlocks ? _uncontrolledInnerBlocks : _controlledInnerBlocks,
      hasUncontrolledInnerBlocks: _hasUncontrolledInnerBlocks,
      uncontrolledInnerBlocks: _uncontrolledInnerBlocks,
      controlledInnerBlocks: _controlledInnerBlocks,
      isInnerBlockSelected: hasSelectedInnerBlock(clientId, true)
    };
  }, [clientId]);
}
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