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Fix: 'Block custom CSS: Fix incorrect CSS when multiple root selectors' #5427

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t-hamano wants to merge 1 commit into from
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Fix: 'Block custom CSS: Fix incorrect CSS when multiple root selectors' #5427

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20 changes: 17 additions & 3 deletions src/wp-includes/class-wp-theme-json.php
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Original file line number Diff line number Diff line change
Expand Up @@ -1146,9 +1146,23 @@ protected function process_blocks_custom_css( $css, $selector ) {
// Split CSS nested rules.
$parts = explode( '&', $css );
foreach ( $parts as $part ) {
$processed_css .= ( ! str_contains( $part, '{' ) )
? trim( $selector ) . '{' . trim( $part ) . '}' // If the part doesn't contain braces, it applies to the root level.
: trim( $selector . $part ); // Prepend the selector, which effectively replaces the "&" character.
$is_root_css = ( ! str_contains( $part, '{' ) );
if ( $is_root_css ) {
// If the part doesn't contain braces, it applies to the root level.
$processed_css .= trim( $selector ) . '{' . trim( $part ) . '}';
} else {
// If the part contains braces, it's a nested CSS rule.
$part = explode( '{', str_replace( '}', '', $part ) );
if ( count( $part ) !== 2 ) {
continue;
}
$nested_selector = $part[0];
$css_value = $part[1];
$part_selector = str_starts_with( $nested_selector, ' ' )
? static::scope_selector( $selector, $nested_selector )
: static::append_to_selector( $selector, $nested_selector );
$processed_css .= $part_selector . '{' . trim( $css_value ) . '}';
}
}
return $processed_css;
}
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