shell bypass 403
<?php
/**
* Block visibility block support flag.
*
* @package WordPress
* @since 6.9.0
*/
/**
* Render nothing if the block is hidden, or add viewport visibility styles.
*
* @since 6.9.0
* @since 7.0.0 Added support for viewport visibility.
* @access private
*
* @param string $block_content Rendered block content.
* @param array $block Block object.
* @return string Filtered block content.
*/
function wp_render_block_visibility_support( $block_content, $block ) {
$block_type = WP_Block_Type_Registry::get_instance()->get_registered( $block['blockName'] );
if ( ! $block_type || ! block_has_support( $block_type, 'visibility', true ) ) {
return $block_content;
}
$block_visibility = $block['attrs']['metadata']['blockVisibility'] ?? null;
if ( false === $block_visibility ) {
return '';
}
if ( is_array( $block_visibility ) && ! empty( $block_visibility ) ) {
$viewport_config = $block_visibility['viewport'] ?? null;
if ( ! is_array( $viewport_config ) || empty( $viewport_config ) ) {
return $block_content;
}
/*
* Viewport size definitions are in several places in WordPress packages.
* The following are taken from: https://github.com/WordPress/gutenberg/blob/trunk/packages/base-styles/_breakpoints.scss
* The array is in a future, potential JSON format, and will be centralized
* as the feature is developed.
*
* Viewport sizes as array items are defined sequentially. The first item's size is the max value.
* Each subsequent item starts after the previous size (using > operator), and its size is the max.
* The last item starts after the previous size (using > operator), and it has no max.
*/
$viewport_sizes = array(
array(
'name' => 'Mobile',
'slug' => 'mobile',
'size' => '480px',
),
array(
'name' => 'Tablet',
'slug' => 'tablet',
'size' => '782px',
),
array(
'name' => 'Desktop',
'slug' => 'desktop',
/*
* Note: the last item in the $viewport_sizes array does not technically require a 'size' key,
* as the last item's media query is calculated using `width > previous size`.
* The last item is present for validating the attribute values, and in order to indicate
* that this is the final viewport size, and to calculate the previous media query accordingly.
*/
),
);
/*
* Build media queries from viewport size definitions using the CSS range syntax.
* Could be absorbed into the style engine,
* as well as classname building, and declaration of the display property, if required.
*/
$viewport_media_queries = array();
$previous_size = null;
foreach ( $viewport_sizes as $index => $viewport_size ) {
// First item: width <= size.
if ( 0 === $index ) {
$viewport_media_queries[ $viewport_size['slug'] ] = "@media (width <= {$viewport_size['size']})";
} elseif ( count( $viewport_sizes ) - 1 === $index && $previous_size ) {
// Last item: width > previous size.
$viewport_media_queries[ $viewport_size['slug'] ] = "@media (width > $previous_size)";
} else {
// Middle items: previous size < width <= size.
$viewport_media_queries[ $viewport_size['slug'] ] = "@media ({$previous_size} < width <= {$viewport_size['size']})";
}
$previous_size = $viewport_size['size'] ?? null;
}
$hidden_on = array();
// Collect which viewport the block is hidden on (only known viewport sizes).
foreach ( $viewport_config as $viewport_config_size => $is_visible ) {
if ( false === $is_visible && isset( $viewport_media_queries[ $viewport_config_size ] ) ) {
$hidden_on[] = $viewport_config_size;
}
}
// If no viewport sizes have visibility set to false, return unchanged.
if ( empty( $hidden_on ) ) {
return $block_content;
}
// Maintain consistent order of viewport sizes for class name generation.
sort( $hidden_on );
$css_rules = array();
$class_names = array();
foreach ( $hidden_on as $hidden_viewport_size ) {
/*
* If these values ever become user-defined,
* they should be sanitized and kebab-cased.
*/
$visibility_class = 'wp-block-hidden-' . $hidden_viewport_size;
$class_names[] = $visibility_class;
$css_rules[] = array(
'selector' => '.' . $visibility_class,
'declarations' => array(
'display' => 'none !important',
),
'rules_group' => $viewport_media_queries[ $hidden_viewport_size ],
);
}
wp_style_engine_get_stylesheet_from_css_rules(
$css_rules,
array(
'context' => 'block-supports',
'prettify' => false,
)
);
if ( ! empty( $block_content ) ) {
$processor = new WP_HTML_Tag_Processor( $block_content );
if ( $processor->next_tag() ) {
$processor->add_class( implode( ' ', $class_names ) );
/*
* Set all IMG tags to be `fetchpriority=auto` so that wp_get_loading_optimization_attributes() won't add
* `fetchpriority=high` or increment the media count to affect whether subsequent IMG tags get `loading=lazy`.
*/
do {
if ( 'IMG' === $processor->get_tag() ) {
$processor->set_attribute( 'fetchpriority', 'auto' );
}
} while ( $processor->next_tag() );
$block_content = $processor->get_updated_html();
}
}
}
return $block_content;
}
add_filter( 'render_block', 'wp_render_block_visibility_support', 10, 2 );