compat/6.1: add missing backport for get_stylesheet

#42124

lib/compat/wordpress-6.2/class-wp-theme-json-gutenberg.php

@@ -890,9 +890,12 @@ public function get_settings() {
  * - `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.
+ * @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 The resulting 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;
  }
@@ -913,30 +916,58 @@ 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',
  ),
  );
@@ -1397,11 +1428,20 @@ protected static function scope_selector( $scope, $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;
  }
 
  /**