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

Block library for the WordPress editor.

import { createElement } from "@wordpress/element";

/**
 * WordPress dependencies
 */
import { useEntityBlockEditor } from '@wordpress/core-data';
import { useInnerBlocksProps, InnerBlocks, store as blockEditorStore } from '@wordpress/block-editor';
import { useSelect } from '@wordpress/data';
import { useMemo } from '@wordpress/element';
/**
 * Internal dependencies
 */

import PlaceholderPreview from './placeholder/placeholder-preview';
const ALLOWED_BLOCKS = ['core/navigation-link', 'core/search', 'core/social-links', 'core/page-list', 'core/spacer', 'core/home-link', 'core/site-title', 'core/site-logo', 'core/navigation-submenu'];
const DEFAULT_BLOCK = {
  name: 'core/navigation-link'
};
const LAYOUT = {
  type: 'default',
  alignments: []
};
export default function NavigationInnerBlocks(_ref) {
  let {
    clientId,
    hasCustomPlaceholder,
    orientation
  } = _ref;
  const {
    isImmediateParentOfSelectedBlock,
    selectedBlockHasChildren,
    isSelected
  } = useSelect(select => {
    const {
      getBlockCount,
      hasSelectedInnerBlock,
      getSelectedBlockClientId
    } = select(blockEditorStore);
    const selectedBlockId = getSelectedBlockClientId();
    return {
      isImmediateParentOfSelectedBlock: hasSelectedInnerBlock(clientId, false),
      selectedBlockHasChildren: !!getBlockCount(selectedBlockId),
      // This prop is already available but computing it here ensures it's
      // fresh compared to isImmediateParentOfSelectedBlock.
      isSelected: selectedBlockId === clientId
    };
  }, [clientId]);
  const [blocks, onInput, onChange] = useEntityBlockEditor('postType', 'wp_navigation');
  const shouldDirectInsert = useMemo(() => blocks.every(_ref2 => {
    let {
      name
    } = _ref2;
    return name === 'core/navigation-link' || name === 'core/navigation-submenu' || name === 'core/page-list';
  }), [blocks]); // When the block is selected itself or has a top level item selected that
  // doesn't itself have children, show the standard appender. Else show no
  // appender.

  const parentOrChildHasSelection = isSelected || isImmediateParentOfSelectedBlock && !selectedBlockHasChildren;
  const placeholder = useMemo(() => createElement(PlaceholderPreview, null), []);
  const hasMenuItems = !!(blocks !== null && blocks !== void 0 && blocks.length); // If there is a `ref` attribute pointing to a `wp_navigation` but
  // that menu has no **items** (i.e. empty) then show a placeholder.
  // The block must also be selected else the placeholder will display
  // alongside the appender.

  const showPlaceholder = !hasCustomPlaceholder && !hasMenuItems && !isSelected;
  const innerBlocksProps = useInnerBlocksProps({
    className: 'wp-block-navigation__container'
  }, {
    value: blocks,
    onInput,
    onChange,
    allowedBlocks: ALLOWED_BLOCKS,
    __experimentalDefaultBlock: DEFAULT_BLOCK,
    __experimentalDirectInsert: shouldDirectInsert,
    orientation,
    // As an exception to other blocks which feature nesting, show
    // the block appender even when a child block is selected.
    // This should be a temporary fix, to be replaced by improvements to
    // the sibling inserter.
    // See https://github.com/WordPress/gutenberg/issues/37572.
    renderAppender: isSelected || isImmediateParentOfSelectedBlock && !selectedBlockHasChildren || // Show the appender while dragging to allow inserting element between item and the appender.
    parentOrChildHasSelection ? InnerBlocks.ButtonBlockAppender : false,
    // Template lock set to false here so that the Nav
    // Block on the experimental menus screen does not
    // inherit templateLock={ 'all' }.
    templateLock: false,
    __experimentalLayout: LAYOUT,
    placeholder: showPlaceholder ? placeholder : undefined
  });
  return createElement("div", innerBlocksProps);
}
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