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<?php
/**
* Block level presets support.
*
* @package WordPress
* @since 6.2.0
*/
/**
* Get the class name used on block level presets.
*
* @internal
*
* @since 6.2.0
* @access private
*
* @param array $block Block object.
* @return string The unique class name.
*/
function _wp_get_presets_class_name( $block ) {
return 'wp-settings-' . md5( serialize( $block ) );
}
/**
* Update the block content with block level presets class name.
*
* @internal
*
* @since 6.2.0
* @access private
*
* @param string $block_content Rendered block content.
* @param array $block Block object.
* @return string Filtered block content.
*/
function _wp_add_block_level_presets_class( $block_content, $block ) {
if ( ! $block_content ) {
return $block_content;
}
// return early if the block doesn't have support for settings.
$block_type = WP_Block_Type_Registry::get_instance()->get_registered( $block['blockName'] );
if ( ! block_has_support( $block_type, '__experimentalSettings', false ) ) {
return $block_content;
}
// return early if no settings are found on the block attributes.
$block_settings = $block['attrs']['settings'] ?? null;
if ( empty( $block_settings ) ) {
return $block_content;
}
// Like the layout hook this assumes the hook only applies to blocks with a single wrapper.
// Add the class name to the first element, presuming it's the wrapper, if it exists.
$tags = new WP_HTML_Tag_Processor( $block_content );
if ( $tags->next_tag() ) {
$tags->add_class( _wp_get_presets_class_name( $block ) );
}
return $tags->get_updated_html();
}
/**
* Render the block level presets stylesheet.
*
* @internal
*
* @since 6.2.0
* @since 6.3.0 Updated preset styles to use Selectors API.
* @access private
*
* @param string|null $pre_render The pre-rendered content. Default null.
* @param array $block The block being rendered.
*
* @return null
*/
function _wp_add_block_level_preset_styles( $pre_render, $block ) {
// Return early if the block has not support for descendent block styles.
$block_type = WP_Block_Type_Registry::get_instance()->get_registered( $block['blockName'] );
if ( ! block_has_support( $block_type, '__experimentalSettings', false ) ) {
return null;
}
// return early if no settings are found on the block attributes.
$block_settings = $block['attrs']['settings'] ?? null;
if ( empty( $block_settings ) ) {
return null;
}
$class_name = '.' . _wp_get_presets_class_name( $block );
// the root selector for preset variables needs to target every possible block selector
// in order for the general setting to override any bock specific setting of a parent block or
// the site root.
$variables_root_selector = '*,[class*="wp-block"]';
$registry = WP_Block_Type_Registry::get_instance();
$blocks = $registry->get_all_registered();
foreach ( $blocks as $block_type ) {
/*
* We only want to append selectors for blocks using custom selectors
* i.e. not `wp-block-<name>`.
*/
$has_custom_selector =
( isset( $block_type->supports['__experimentalSelector'] ) && is_string( $block_type->supports['__experimentalSelector'] ) ) ||
( isset( $block_type->selectors['root'] ) && is_string( $block_type->selectors['root'] ) );
if ( $has_custom_selector ) {
$variables_root_selector .= ',' . wp_get_block_css_selector( $block_type );
}
}
$variables_root_selector = WP_Theme_JSON::scope_selector( $class_name, $variables_root_selector );
// Remove any potentially unsafe styles.
$theme_json_shape = WP_Theme_JSON::remove_insecure_properties(
array(
'version' => WP_Theme_JSON::LATEST_SCHEMA,
'settings' => $block_settings,
)
);
$theme_json_object = new WP_Theme_JSON( $theme_json_shape );
$styles = '';
// include preset css variables declaration on the stylesheet.
$styles .= $theme_json_object->get_stylesheet(
array( 'variables' ),
null,
array(
'root_selector' => $variables_root_selector,
'scope' => $class_name,
)
);
// include preset css classes on the the stylesheet.
$styles .= $theme_json_object->get_stylesheet(
array( 'presets' ),
null,
array(
'root_selector' => $class_name . ',' . $class_name . ' *',
'scope' => $class_name,
)
);
if ( ! empty( $styles ) ) {
wp_enqueue_block_support_styles( $styles );
}
return null;
}
add_filter( 'render_block', '_wp_add_block_level_presets_class', 10, 2 );
add_filter( 'pre_render_block', '_wp_add_block_level_preset_styles', 10, 2 );