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<?php |
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/** |
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* Server-side rendering of the `core/cover` block. |
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* |
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* @package WordPress |
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*/ |
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|
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/** |
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* Renders the `core/cover` block on server. |
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* |
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* @since 6.0.0 |
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* |
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* @param array $attributes The block attributes. |
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* @param string $content The block rendered content. |
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* |
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* @return string Returns the cover block markup, if useFeaturedImage is true. |
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*/ |
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function gutenberg_render_block_core_cover( $attributes, $content ) { |
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// Handle embed video background. |
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if ( |
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isset( $attributes['backgroundType'] ) && |
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'embed-video' === $attributes['backgroundType'] && |
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isset( $attributes['url'] ) && |
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! empty( $attributes['url'] ) && |
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is_string( $attributes['url'] ) |
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) { |
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$url = $attributes['url']; |
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|
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// Use WordPress's native oEmbed processing (includes caching). |
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$oembed_html = wp_oembed_get( $url ); |
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|
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if ( $oembed_html ) { |
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// Extract iframe src from the oEmbed HTML. |
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preg_match( '/src=["\']([^"\']+)["\']/', $oembed_html, $src_matches ); |
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if ( ! empty( $src_matches[1] ) ) { |
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$iframe_src = $src_matches[1]; |
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|
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// Detect provider from iframe src URL. |
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$lower_src = strtolower( $iframe_src ); |
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$provider = null; |
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|
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if ( str_contains( $lower_src, 'youtube.com' ) || str_contains( $lower_src, 'youtu.be' ) ) { |
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$provider = 'youtube'; |
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} elseif ( str_contains( $lower_src, 'vimeo.com' ) ) { |
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$provider = 'vimeo'; |
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} elseif ( str_contains( $lower_src, 'videopress.com' ) ) { |
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$provider = 'videopress'; |
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} elseif ( str_contains( $lower_src, 'wordpress.tv' ) ) { |
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$provider = 'wordpress-tv'; |
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} |
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|
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// Modify iframe src to add background video parameters based on provider. |
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$parsed_url = wp_parse_url( $iframe_src ); |
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if ( $parsed_url && isset( $parsed_url['host'] ) ) { |
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// Parse existing query parameters. |
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$query_params = array(); |
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if ( isset( $parsed_url['query'] ) ) { |
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parse_str( $parsed_url['query'], $query_params ); |
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} |
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|
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// Add background video parameters based on provider. |
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if ( 'youtube' === $provider ) { |
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$query_params['autoplay'] = '1'; |
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$query_params['mute'] = '1'; |
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$query_params['loop'] = '1'; |
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$query_params['controls'] = '0'; |
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$query_params['modestbranding'] = '1'; |
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$query_params['playsinline'] = '1'; |
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|
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// For loop to work, we need the playlist parameter. |
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$path = $parsed_url['path'] ?? ''; |
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$path_segments = explode( '/', $path ); |
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$video_id = end( $path_segments ); |
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if ( $video_id ) { |
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$query_params['playlist'] = $video_id; |
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} |
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} elseif ( 'vimeo' === $provider ) { |
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$query_params['autoplay'] = '1'; |
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$query_params['muted'] = '1'; |
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$query_params['loop'] = '1'; |
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$query_params['background'] = '1'; |
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$query_params['controls'] = '0'; |
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$query_params['transparent'] = '0'; |
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} elseif ( 'videopress' === $provider || 'wordpress-tv' === $provider ) { |
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$query_params['autoplay'] = '1'; |
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$query_params['loop'] = '1'; |
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$query_params['muted'] = '1'; |
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} |
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|
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// Rebuild the URL with new parameters. |
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$iframe_src = $parsed_url['scheme'] . '://' . $parsed_url['host']; |
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if ( isset( $parsed_url['path'] ) ) { |
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$iframe_src .= $parsed_url['path']; |
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} |
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if ( ! empty( $query_params ) ) { |
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$iframe_src .= '?' . http_build_query( $query_params ); |
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} |
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} |
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|
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// Build the iframe HTML that will replace the figure. |
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$iframe_html = sprintf( |
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'<div class="wp-block-cover__video-background wp-block-cover__embed-background"><iframe src="%s" title="Background video" frameborder="0" allow="autoplay; fullscreen"></iframe></div>', |
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esc_url( $iframe_src ) |
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); |
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|
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// Use the HTML API to find and replace the figure.wp-block-embed element. |
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$processor = new WP_HTML_Tag_Processor( $content ); |
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|
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if ( $processor->next_tag( |
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array( |
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'tag_name' => 'FIGURE', |
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'class_name' => 'wp-block-embed', |
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) |
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) ) { |
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// Use regex with PREG_OFFSET_CAPTURE to find the position of the figure element. |
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// This follows the same pattern used for featured image insertion below. |
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$figure_pattern = '/<figure\s+[^>]*\bwp-block-embed\b[^>]*>.*?<\/figure>/is'; |
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if ( 1 === preg_match( $figure_pattern, $content, $matches, PREG_OFFSET_CAPTURE ) ) { |
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$figure_start = $matches[0][1]; |
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$figure_length = strlen( $matches[0][0] ); |
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$figure_end = $figure_start + $figure_length; |
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|
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// Replace the figure element with the iframe HTML. |
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$content = substr( $content, 0, $figure_start ) . $iframe_html . substr( $content, $figure_end ); |
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} |
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} |
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} |
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} |
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|
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return $content; |
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} |
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|
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if ( 'image' !== $attributes['backgroundType'] || false === $attributes['useFeaturedImage'] ) { |
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return $content; |
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} |
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|
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$object_position = isset( $attributes['focalPoint'] ) |
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? round( $attributes['focalPoint']['x'] * 100 ) . '% ' . round( $attributes['focalPoint']['y'] * 100 ) . '%' |
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: null; |
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|
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if ( ! ( $attributes['hasParallax'] || $attributes['isRepeated'] ) ) { |
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$attr = array( |
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'class' => 'wp-block-cover__image-background', |
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'data-object-fit' => 'cover', |
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); |
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|
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if ( $object_position ) { |
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$attr['data-object-position'] = $object_position; |
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$attr['style'] = 'object-position:' . $object_position . ';'; |
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} |
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|
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$image = get_the_post_thumbnail( null, $attributes['sizeSlug'] ?? 'post-thumbnail', $attr ); |
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} else { |
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if ( in_the_loop() ) { |
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update_post_thumbnail_cache(); |
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} |
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$current_featured_image = get_the_post_thumbnail_url( null, $attributes['sizeSlug'] ?? null ); |
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if ( ! $current_featured_image ) { |
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return $content; |
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} |
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|
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$current_thumbnail_id = get_post_thumbnail_id(); |
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|
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$processor = new WP_HTML_Tag_Processor( '<div></div>' ); |
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$processor->next_tag(); |
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|
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$current_alt = trim( strip_tags( get_post_meta( $current_thumbnail_id, '_wp_attachment_image_alt', true ) ) ); |
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if ( $current_alt ) { |
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$processor->set_attribute( 'role', 'img' ); |
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$processor->set_attribute( 'aria-label', $current_alt ); |
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} |
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|
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$processor->add_class( 'wp-block-cover__image-background' ); |
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$processor->add_class( 'wp-image-' . $current_thumbnail_id ); |
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if ( $attributes['hasParallax'] ) { |
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$processor->add_class( 'has-parallax' ); |
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} |
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if ( $attributes['isRepeated'] ) { |
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$processor->add_class( 'is-repeated' ); |
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} |
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|
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$styles = 'background-position:' . ( $object_position ?? '50% 50%' ) . ';'; |
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$styles .= 'background-image:url(' . esc_url( $current_featured_image ) . ');'; |
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$processor->set_attribute( 'style', $styles ); |
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|
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$image = $processor->get_updated_html(); |
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} |
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|
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/* |
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* Inserts the featured image between the (1st) cover 'background' `span` and 'inner_container' `div`, |
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* and removes eventual whitespace characters between the two (typically introduced at template level) |
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*/ |
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$inner_container_start = '/<div\b[^>]+wp-block-cover__inner-container[\s|"][^>]*>/U'; |
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if ( 1 === preg_match( $inner_container_start, $content, $matches, PREG_OFFSET_CAPTURE ) ) { |
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$offset = $matches[0][1]; |
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$content = substr( $content, 0, $offset ) . $image . substr( $content, $offset ); |
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} |
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|
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return $content; |
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} |
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|
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/** |
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* Registers the `core/cover` block renderer on server. |
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* |
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* @since 6.0.0 |
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*/ |
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function gutenberg_register_block_core_cover() { |
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register_block_type_from_metadata( |
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__DIR__ . '/cover', |
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array( |
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'render_callback' => 'gutenberg_render_block_core_cover', |
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) |
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); |
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} |
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add_action( 'init', 'gutenberg_register_block_core_cover', 20 ); |
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|
