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inner-blocks.js
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/**
* 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( {
clientId,
hasCustomPlaceholder,
orientation,
templateLock,
} ) {
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(
( { name } ) =>
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( () => <PlaceholderPreview />, [] );
const hasMenuItems = !! 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,
templateLock,
// 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,
__experimentalLayout: LAYOUT,
placeholder: showPlaceholder ? placeholder : undefined,
}
);
return <div { ...innerBlocksProps } />;
}