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Editor: Fix missing frontend section presets output.
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Backports PHP changes in WordPress/gutenberg#42124 to the core. Adds the missing mechanism to output frontend styles of block level presets to the core.

Props mcsf, oandregal, dmsnell, draganescu.
See #56467.

git-svn-id: https://develop.svn.wordpress.org/trunk@54305 602fd350-edb4-49c9-b593-d223f7449a82
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jorgefilipecosta authored and = committed Nov 4, 2022
1 parent 0117bbc commit 81f6d78
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Showing 3 changed files with 205 additions and 13 deletions.
152 changes: 152 additions & 0 deletions src/wp-includes/block-supports/settings.php
Original file line number Diff line number Diff line change
@@ -0,0 +1,152 @@
<?php
/**
* Block level presets support.
*
* @package WordPress
* @since 6.1.0
*/

/**
* Get the class name used on block level presets.
*
* @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.
*
* @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, array( '__experimentalSettings' ), false ) ) {
return $block_content;
}

// return early if no settings are found on the block attributes.
$block_settings = _wp_array_get( $block, array( 'attrs', 'settings' ), null );
if ( empty( $block_settings ) ) {
return $block_content;
}

$class_name = _wp_get_presets_class_name( $block );

// Like the layout hook this assumes the hook only applies to blocks with a single wrapper.
// Retrieve the opening tag of the first HTML element.
$html_element_matches = array();
preg_match( '/<[^>]+>/', $block_content, $html_element_matches, PREG_OFFSET_CAPTURE );
$first_element = $html_element_matches[0][0];
// If the first HTML element has a class attribute just add the new class
// as we do on layout and duotone.
if ( strpos( $first_element, 'class="' ) !== false ) {
$content = preg_replace(
'/' . preg_quote( 'class="', '/' ) . '/',
'class="' . $class_name . ' ',
$block_content,
1
);
} else {
// If the first HTML element has no class attribute we should inject the attribute before the attribute at the end.
$first_element_offset = $html_element_matches[0][1];
$content = substr_replace( $block_content, ' class="' . $class_name . '"', $first_element_offset + strlen( $first_element ) - 1, 0 );
}

return $content;
}

/**
* Render the block level presets stylesheet.
*
* @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, array( '__experimentalSettings' ), false ) ) {
return null;
}

// return early if no settings are found on the block attributes.
$block_settings = _wp_array_get( $block, array( '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 ) {
if (
isset( $block_type->supports['__experimentalSelector'] ) &&
is_string( $block_type->supports['__experimentalSelector'] )
) {
$variables_root_selector .= ',' . $block_type->supports['__experimentalSelector'];
}
}
$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 );
65 changes: 52 additions & 13 deletions src/wp-includes/class-wp-theme-json.php
Original file line number Diff line number Diff line change
Expand Up @@ -773,7 +773,7 @@ protected static function get_blocks_metadata() {
static::$blocks_metadata[ $block_name ]['features'] = $features;
}

// Assign defaults, then overwrite those that the block sets by itself.
// Assign defaults, then override those that the block sets by itself.
// If the block selector is compounded, will append the element to each
// individual block selector.
$block_selectors = explode( ',', static::$blocks_metadata[ $block_name ]['selector'] );
Expand Down Expand Up @@ -866,11 +866,13 @@ public function get_settings() {
* @param array $types Types of styles to load. Will load all by default. It accepts:
* - `variables`: only the CSS Custom Properties for presets & custom ones.
* - `styles`: only the styles section in theme.json.
* - `presets`: only the classes for the presets.
* @param array $origins A list of origins to include. By default it includes VALID_ORIGINS.
* - `presets`: only the classes for the presets. @param array $origins A list of origins to include. By default it includes VALID_ORIGINS.
* @param array $options An array of options for now used for internal purposes only (may change without notice).
* The options currently supported are 'scope' that makes sure all style are scoped to a given selector,
* and root_selector which overwrites and forces a given selector to be used on the root node.
* @return string Stylesheet.
*/
public function get_stylesheet( $types = array( 'variables', 'styles', 'presets' ), $origins = null ) {
public function get_stylesheet( $types = array( 'variables', 'styles', 'presets' ), $origins = null, $options = array() ) {
if ( null === $origins ) {
$origins = static::VALID_ORIGINS;
}
Expand All @@ -891,30 +893,58 @@ public function get_stylesheet( $types = array( 'variables', 'styles', 'presets'
$style_nodes = static::get_style_nodes( $this->theme_json, $blocks_metadata );
$setting_nodes = static::get_setting_nodes( $this->theme_json, $blocks_metadata );

$root_style_key = array_search( static::ROOT_BLOCK_SELECTOR, array_column( $style_nodes, 'selector' ), true );
$root_settings_key = array_search( static::ROOT_BLOCK_SELECTOR, array_column( $setting_nodes, 'selector' ), true );

if ( ! empty( $options['scope'] ) ) {
foreach ( $setting_nodes as &$node ) {
$node['selector'] = static::scope_selector( $options['scope'], $node['selector'] );
}
foreach ( $style_nodes as &$node ) {
$node['selector'] = static::scope_selector( $options['scope'], $node['selector'] );
}
}

if ( ! empty( $options['root_selector'] ) ) {
if ( false !== $root_settings_key ) {
$setting_nodes[ $root_settings_key ]['selector'] = $options['root_selector'];
}
if ( false !== $root_style_key ) {
$setting_nodes[ $root_style_key ]['selector'] = $options['root_selector'];
}
}

$stylesheet = '';

if ( in_array( 'variables', $types, true ) ) {
$stylesheet .= $this->get_css_variables( $setting_nodes, $origins );
}

if ( in_array( 'styles', $types, true ) ) {
$root_block_key = array_search( static::ROOT_BLOCK_SELECTOR, array_column( $style_nodes, 'selector' ), true );

if ( false !== $root_block_key ) {
$stylesheet .= $this->get_root_layout_rules( static::ROOT_BLOCK_SELECTOR, $style_nodes[ $root_block_key ] );
if ( false !== $root_style_key ) {
$stylesheet .= $this->get_root_layout_rules( $style_nodes[ $root_style_key ]['selector'], $style_nodes[ $root_style_key ] );
}
$stylesheet .= $this->get_block_classes( $style_nodes );
} elseif ( in_array( 'base-layout-styles', $types, true ) ) {
$root_selector = static::ROOT_BLOCK_SELECTOR;
$columns_selector = '.wp-block-columns';
if ( ! empty( $options['scope'] ) ) {
$root_selector = static::scope_selector( $options['scope'], $root_selector );
$columns_selector = static::scope_selector( $options['scope'], $columns_selector );
}
if ( ! empty( $options['root_selector'] ) ) {
$root_selector = $options['root_selector'];
}
// Base layout styles are provided as part of `styles`, so only output separately if explicitly requested.
// For backwards compatibility, the Columns block is explicitly included, to support a different default gap value.
$base_styles_nodes = array(
array(
'path' => array( 'styles' ),
'selector' => static::ROOT_BLOCK_SELECTOR,
'selector' => $root_selector,
),
array(
'path' => array( 'styles', 'blocks', 'core/columns' ),
'selector' => '.wp-block-columns',
'selector' => $columns_selector,
'name' => 'core/columns',
),
);
Expand Down Expand Up @@ -1365,18 +1395,27 @@ protected static function compute_preset_classes( $settings, $selector, $origins
* @param string $selector Original selector.
* @return string Scoped selector.
*/
protected static function scope_selector( $scope, $selector ) {
public static function scope_selector( $scope, $selector ) {
$scopes = explode( ',', $scope );
$selectors = explode( ',', $selector );

$selectors_scoped = array();
foreach ( $scopes as $outer ) {
foreach ( $selectors as $inner ) {
$selectors_scoped[] = trim( $outer ) . ' ' . trim( $inner );
$outer = trim( $outer );
$inner = trim( $inner );
if ( ! empty( $outer ) && ! empty( $inner ) ) {
$selectors_scoped[] = $outer . ' ' . $inner;
} elseif ( empty( $outer ) ) {
$selectors_scoped[] = $inner;
} elseif ( empty( $inner ) ) {
$selectors_scoped[] = $outer;
}
}
}

return implode( ', ', $selectors_scoped );
$result = implode( ', ', $selectors_scoped );
return $result;
}

/**
Expand Down
1 change: 1 addition & 0 deletions src/wp-settings.php
Original file line number Diff line number Diff line change
Expand Up @@ -322,6 +322,7 @@
require ABSPATH . WPINC . '/block-patterns.php';
require ABSPATH . WPINC . '/class-wp-block-supports.php';
require ABSPATH . WPINC . '/block-supports/utils.php';
require ABSPATH . WPINC . '/block-supports/settings.php';
require ABSPATH . WPINC . '/block-supports/align.php';
require ABSPATH . WPINC . '/block-supports/border.php';
require ABSPATH . WPINC . '/block-supports/colors.php';
Expand Down

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