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Introduce a custom version of the enqueue_block_styles_assets function #36089

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Introduce a custom version of the enqueue_block_styles_assets function #36089

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6aa111e
Introduce a custom version of the enqueue_block_styles_assets function
david-binda Oct 29, 2021
7ec554b
Improve the comments.
david-binda Oct 29, 2021
034919d
Add version check for not replacing the funciton in WP >= 5.8.2
david-binda Nov 2, 2021
6db944b
Only replace the core callback in case it's hooked to
david-binda Nov 2, 2021
8c0a980
Improve the conditional to check for the core's priority of the
david-binda Nov 3, 2021
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56 changes: 56 additions & 0 deletions lib/compat/wordpress-5.9/default-theme-supports.php
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Original file line number Diff line number Diff line change
Expand Up @@ -19,3 +19,59 @@
add_theme_support( 'automatic-feed-links' );
add_filter( 'should_load_separate_core_block_assets', '__return_true' );
}

/**
* Overrides the WordPress enqueue_block_styles_assets function, which contains
* a bug eventually leading to a fatal error for full site editing enabled themes
* which do register custom block styles and don't have a template for requested
* template (eg.: 404)
*
* More details on the bug can be found in: https://core.trac.wordpress.org/ticket/54323
*
* @see enqueue_block_styles_assets
*/
function gutenberg_enqueue_block_styles_assets() {
$block_styles = WP_Block_Styles_Registry::get_instance()->get_all_registered();

foreach ( $block_styles as $block_name => $styles ) {
foreach ( $styles as $style_properties ) {
if ( isset( $style_properties['style_handle'] ) ) {

// If the site loads separate styles per-block, enqueue the stylesheet on render.
if ( wp_should_load_separate_core_block_assets() ) {
add_filter(
'render_block',
function( $html ) use ( $style_properties ) {
wp_enqueue_style( $style_properties['style_handle'] );
return $html;
}
);
} else {
wp_enqueue_style( $style_properties['style_handle'] );
}
}
if ( isset( $style_properties['inline_style'] ) ) {

// Default to "wp-block-library".
$handle = 'wp-block-library';

// If the site loads separate styles per-block, check if the block has a stylesheet registered.
if ( wp_should_load_separate_core_block_assets() ) {
$block_stylesheet_handle = generate_block_asset_handle( $block_name, 'style' );
global $wp_styles;
if ( isset( $wp_styles->registered[ $block_stylesheet_handle ] ) ) {
$handle = $block_stylesheet_handle;
}
}

// Add inline styles to the calculated handle.
wp_add_inline_style( $handle, $style_properties['inline_style'] );
}
}
}
}

if ( version_compare( get_bloginfo( 'version' ), '5.8.2', '<' ) && 30 === has_action( 'enqueue_block_assets', 'enqueue_block_styles_assets' ) ) {
remove_action( 'enqueue_block_assets', 'enqueue_block_styles_assets', 30 );
add_action( 'enqueue_block_assets', 'gutenberg_enqueue_block_styles_assets', 30 );
}