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<?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 );
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