_wp_add_block_level_preset_styles( string|null $pre_render, array $block ): null

Compatibility

Present in every tracked release (6.7.7 to 7.1.0), and compiles on PHP 7.4 through 8.6-dev.

Parameters

$pre_renderstring|null

The pre-rendered content. Default null.

$blockarray

The block being rendered.

Return value

null

Performance profile

How much work a call to _wp_add_block_level_preset_styles() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.

Cost class

Light

Touches nothing outside its own arguments.

Scaling

Scales with input

The body loops, so the work grows with what you pass in.

Instructions

17–79

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 102.

Plugin surface

None

Nothing here hands control to plugin code.

Called by

0

Nothing in core calls this; the cost is only what you spend yourself.

What one call costs · 3 distinct outcomes

One number would be a lie: the work depends on which branch runs. These are every distinct cost _wp_add_block_level_preset_styles() can have, taken from its control-flow graph on PHP 8.5.

Uses · 9

• block_has_support()Checks whether the current block type supports the feature requested.
• _wp_get_presets_class_name()Get the class name used on block level presets.
• wp_get_block_css_selector()Determines the CSS selector for the block type and property provided, returning it if available.
• wp_enqueue_block_support_styles()Hooks inline styles in the proper place, depending on the active theme.
• WP_Block_Type_Registry::get_instance()::get_registered()
• WP_Block_Type_Registry::get_instance()Utility method to retrieve the main instance of the class.
• WP_Theme_JSON::scope_selector()Function that scopes a selector with another one. This works a bit like SCSS nesting except the `&` operator isn't supported.
• WP_Theme_JSON::remove_insecure_properties()Removes insecure data from theme.json.
• WP_Theme_JSON::__construct()Constructor.

Source code

View on Trac ↗View on GitHub ↗

77function _wp_add_block_level_preset_styles( $pre_render, $block ) {78	// Return early if the block has not support for descendent block styles.79	$block_type = WP_Block_Type_Registry::get_instance()->get_registered( $block['blockName'] );80	if ( ! block_has_support( $block_type, '__experimentalSettings', false ) ) {81		return null;82	}83 84	// return early if no settings are found on the block attributes.85	$block_settings = $block['attrs']['settings'] ?? null;86	if ( empty( $block_settings ) ) {87		return null;88	}89 90	$class_name = '.' . _wp_get_presets_class_name( $block );91 92	// the root selector for preset variables needs to target every possible block selector93	// in order for the general setting to override any bock specific setting of a parent block or94	// the site root.95	$variables_root_selector = '*,[class*="wp-block"]';96	$registry                = WP_Block_Type_Registry::get_instance();97	$blocks                  = $registry->get_all_registered();98	foreach ( $blocks as $block_type ) {99		/*100		 * We only want to append selectors for blocks using custom selectors101		 * i.e. not `wp-block-<name>`.102		 */103		$has_custom_selector =104			( isset( $block_type->supports['__experimentalSelector'] ) && is_string( $block_type->supports['__experimentalSelector'] ) ) ||105			( isset( $block_type->selectors['root'] ) && is_string( $block_type->selectors['root'] ) );106 107		if ( $has_custom_selector ) {108			$variables_root_selector .= ',' . wp_get_block_css_selector( $block_type );109		}110	}111	$variables_root_selector = WP_Theme_JSON::scope_selector( $class_name, $variables_root_selector );112 113	// Remove any potentially unsafe styles.114	$theme_json_shape  = WP_Theme_JSON::remove_insecure_properties(115		array(116			'version'  => WP_Theme_JSON::LATEST_SCHEMA,117			'settings' => $block_settings,118		)119	);120	$theme_json_object = new WP_Theme_JSON( $theme_json_shape );121 122	$styles = '';123 124	// include preset css variables declaration on the stylesheet.125	$styles .= $theme_json_object->get_stylesheet(126		array( 'variables' ),127		null,128		array(129			'root_selector' => $variables_root_selector,130			'scope'         => $class_name,131		)132	);133 134	// include preset css classes on the stylesheet.135	$styles .= $theme_json_object->get_stylesheet(136		array( 'presets' ),137		null,138		array(139			'root_selector' => $class_name . ',' . $class_name . ' *',140			'scope'         => $class_name,141		)142	);143 144	if ( ! empty( $styles ) ) {145		wp_enqueue_block_support_styles( $styles );146	}147 148	return null;149}

Changelog

Introduced in 6.2.0. Unchanged from 6.7.7 through 7.1.0.

1. 6.7.7
2. 6.8.8
3. 6.9.7
4. 7.0.4
5. 7.1.0

Signature, return type and hooks compared across 5 parsed releases.

About this page

Parsed data

Generated from the wordpress-develop 7.1.0 tag, from src/wp-includes/block-supports/settings.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.

Corrections

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