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Block Hooks: Issue warning about child insertion into semi-incompatible blocks #5810

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Block Hooks: Issue warning about child insertion into semi-incompatible blocks #5810

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Block Hooks: Issue warning about child insertion into semi-incompatib…
ockham Dec 8, 2023
ee00e65
Add Pattern block to problematic notes, and a comment
ockham Dec 8, 2023
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19 changes: 19 additions & 0 deletions src/wp-includes/blocks.php
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Original file line number Diff line number Diff line change
Expand Up @@ -828,6 +828,7 @@ function make_before_block_visitor( $hooked_blocks, $context ) {
// Candidate for first-child insertion.
$relative_position = 'first_child';
$anchor_block_type = $parent_block['blockName'];

$hooked_block_types = isset( $hooked_blocks[ $anchor_block_type ][ $relative_position ] )
? $hooked_blocks[ $anchor_block_type ][ $relative_position ]
: array();
Expand All @@ -847,6 +848,24 @@ function make_before_block_visitor( $hooked_blocks, $context ) {
foreach ( $hooked_block_types as $hooked_block_type ) {
$markup .= get_hooked_block_markup( $parent_block, $hooked_block_type );
}

// See https://make.wordpress.org/core/2023/10/15/introducing-block-hooks-for-dynamic-blocks/
// > Blocks cannot be hooked into post content or patterns crafted by the user, such as
// > synced patterns or theme templates and template parts that the user has modified.
$problematic_anchor_blocks_for_child_insertion = array(
'core/pattern',
'core/post-content',
'core/template-part',
);
if ( in_array( $anchor_block_type, $problematic_anchor_blocks_for_child_insertion, true ) ) {
// Display warning:
// The following block(s) are being inserted into the `first_child` position of $anchor_block_type:
// $hooked_block_types
// Note that due to the nature of the $anchor_block_type block, the hooked block(s) cannot be displayed in the
// Site Editor. Consider using `before` insertion instead.

// Inserting $hooked_block_types into `first_child` position of $anchor_block_type.
}
}

$relative_position = 'before';
Expand Down