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Editor: Fix missing frontend section presets output.
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.
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Original file line number | Diff line number | Diff line change |
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@@ -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; | ||
} | ||
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||
// 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; | ||
} | ||
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||
// 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; | ||
} | ||
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||
$class_name = _wp_get_presets_class_name( $block ); | ||
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// 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 ); | ||
} | ||
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||
return $content; | ||
} | ||
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||
/** | ||
* 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; | ||
} | ||
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||
$class_name = '.' . _wp_get_presets_class_name( $block ); | ||
|
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// 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 ); | ||
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// 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 ); | ||
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||
$styles = ''; | ||
|
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// 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, | ||
) | ||
); | ||
|
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if ( ! empty( $styles ) ) { | ||
wp_enqueue_block_support_styles( $styles ); | ||
} | ||
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return null; | ||
} | ||
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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 ); |
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