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Global Styles: Fix blocks custom css selectors and empty rules #7097

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Global Styles: Fix blocks custom css selectors and empty rules #7097

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27 changes: 24 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 @@ -1445,9 +1445,16 @@ public function get_stylesheet( $types = array( 'variables', 'styles', 'presets'
protected function process_blocks_custom_css( $css, $selector ) {
$processed_css = '';

if ( empty( $css ) ) {
return $processed_css;
}

// Split CSS nested rules.
$parts = explode( '&', $css );
foreach ( $parts as $part ) {
if ( empty( $part ) ) {
continue;
}
$is_root_css = ( ! str_contains( $part, '{' ) );
if ( $is_root_css ) {
// If the part doesn't contain braces, it applies to the root level.
Expand All @@ -1460,11 +1467,25 @@ protected function process_blocks_custom_css( $css, $selector ) {
}
$nested_selector = $part[0];
$css_value = $part[1];
$part_selector = str_starts_with( $nested_selector, ' ' )

/*
* Handle pseudo elements such as ::before, ::after etc. Regex will also
* capture any leading combinator such as >, +, or ~, as well as spaces.
* This allows pseudo elements as descendants e.g. `.parent ::before`.
*/
$matches = array();
$has_pseudo_element = preg_match( '/([>+~\s]*::[a-zA-Z-]+)/', $nested_selector, $matches );
$pseudo_part = $has_pseudo_element ? $matches[1] : '';
$nested_selector = $has_pseudo_element ? str_replace( $pseudo_part, '', $nested_selector ) : $nested_selector;

// Finalize selector and re-append pseudo element if required.
$part_selector = str_starts_with( $nested_selector, ' ' )
? static::scope_selector( $selector, $nested_selector )
: static::append_to_selector( $selector, $nested_selector );
$final_selector = ":root :where($part_selector)";
$processed_css .= $final_selector . '{' . trim( $css_value ) . '}';}
$final_selector = ":root :where($part_selector)$pseudo_part";

$processed_css .= $final_selector . '{' . trim( $css_value ) . '}';
}
}
return $processed_css;
}
Expand Down
19 changes: 17 additions & 2 deletions tests/phpunit/tests/theme/wpThemeJson.php
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Original file line number Diff line number Diff line change
Expand Up @@ -5224,6 +5224,7 @@ public function data_custom_css_for_user_caps() {

/**
* @ticket 61165
* @ticket 61769
*
* @dataProvider data_process_blocks_custom_css
*
Expand Down Expand Up @@ -5251,6 +5252,13 @@ public function test_process_blocks_custom_css( $input, $expected ) {
public function data_process_blocks_custom_css() {
return array(
// Simple CSS without any nested selectors.
'empty css' => array(
'input' => array(
'selector' => '.foo',
'css' => '',
),
'expected' => '',
),
'no nested selectors' => array(
'input' => array(
'selector' => '.foo',
Expand All @@ -5266,21 +5274,28 @@ public function data_process_blocks_custom_css() {
),
'expected' => ':root :where(.foo){color: red; margin: auto;}:root :where(.foo.one){color: blue;}:root :where(.foo .two){color: green;}',
),
'no root styles' => array(
'input' => array(
'selector' => '.foo',
'css' => '&::before{color: red;}',
),
'expected' => ':root :where(.foo)::before{color: red;}',
),
// CSS with pseudo elements.
'with pseudo elements' => array(
'input' => array(
'selector' => '.foo',
'css' => 'color: red; margin: auto; &::before{color: blue;} & ::before{color: green;} &.one::before{color: yellow;} & .two::before{color: purple;}',
),
'expected' => ':root :where(.foo){color: red; margin: auto;}:root :where(.foo::before){color: blue;}:root :where(.foo ::before){color: green;}:root :where(.foo.one::before){color: yellow;}:root :where(.foo .two::before){color: purple;}',
'expected' => ':root :where(.foo){color: red; margin: auto;}:root :where(.foo)::before{color: blue;}:root :where(.foo) ::before{color: green;}:root :where(.foo.one)::before{color: yellow;}:root :where(.foo .two)::before{color: purple;}',
),
// CSS with multiple root selectors.
'with multiple root selectors' => array(
'input' => array(
'selector' => '.foo, .bar',
'css' => 'color: red; margin: auto; &.one{color: blue;} & .two{color: green;} &::before{color: yellow;} & ::before{color: purple;} &.three::before{color: orange;} & .four::before{color: skyblue;}',
),
'expected' => ':root :where(.foo, .bar){color: red; margin: auto;}:root :where(.foo.one, .bar.one){color: blue;}:root :where(.foo .two, .bar .two){color: green;}:root :where(.foo::before, .bar::before){color: yellow;}:root :where(.foo ::before, .bar ::before){color: purple;}:root :where(.foo.three::before, .bar.three::before){color: orange;}:root :where(.foo .four::before, .bar .four::before){color: skyblue;}',
'expected' => ':root :where(.foo, .bar){color: red; margin: auto;}:root :where(.foo.one, .bar.one){color: blue;}:root :where(.foo .two, .bar .two){color: green;}:root :where(.foo, .bar)::before{color: yellow;}:root :where(.foo, .bar) ::before{color: purple;}:root :where(.foo.three, .bar.three)::before{color: orange;}:root :where(.foo .four, .bar .four)::before{color: skyblue;}',
),
);
}
Expand Down