name : post-featured-image.php <?php /** * Server-side rendering of the `core/post-featured-image` block. * * @package WordPress */ /** * Renders the `core/post-featured-image` block on the server. * * @since 5.8.0 * * @param array $attributes Block attributes. * @param string $content Block default content. * @param WP_Block $block Block instance. * @return string Returns the featured image for the current post. */ function render_block_core_post_featured_image( $attributes, $content, $block ) { if ( ! isset( $block->context['postId'] ) ) { return ''; } $post_ID = $block->context['postId']; $is_link = isset( $attributes['isLink'] ) && $attributes['isLink']; $size_slug = isset( $attributes['sizeSlug'] ) ? $attributes['sizeSlug'] : 'post-thumbnail'; $attr = get_block_core_post_featured_image_border_attributes( $attributes ); $overlay_markup = get_block_core_post_featured_image_overlay_element_markup( $attributes ); if ( $is_link ) { if ( get_the_title( $post_ID ) ) { $attr['alt'] = trim( strip_tags( get_the_title( $post_ID ) ) ); } else { $attr['alt'] = sprintf( // translators: %d is the post ID. __( 'Untitled post %d' ), $post_ID ); } } $extra_styles = ''; // Aspect ratio with a height set needs to override the default width/height. if ( ! empty( $attributes['aspectRatio'] ) ) { $extra_styles .= 'width:100%;height:100%;'; } elseif ( ! empty( $attributes['height'] ) ) { $extra_styles .= "height:{$attributes['height']};"; } if ( ! empty( $attributes['scale'] ) ) { $extra_styles .= "object-fit:{$attributes['scale']};"; } if ( ! empty( $attributes['style']['shadow'] ) ) { $shadow_styles = wp_style_engine_get_styles( array( 'shadow' => $attributes['style']['shadow'] ) ); if ( ! empty( $shadow_styles['css'] ) ) { $extra_styles .= $shadow_styles['css']; } } if ( ! empty( $extra_styles ) ) { $attr['style'] = empty( $attr['style'] ) ? $extra_styles : $attr['style'] . $extra_styles; } $featured_image = get_the_post_thumbnail( $post_ID, $size_slug, $attr ); // Get the first image from the post. if ( $attributes['useFirstImageFromPost'] && ! $featured_image ) { $content_post = get_post( $post_ID ); $content = $content_post->post_content; $processor = new WP_HTML_Tag_Processor( $content ); /* * Transfer the image tag from the post into a new text snippet. * Because the HTML API doesn't currently expose a way to extract * HTML substrings this is necessary as a workaround. Of note, this * is different than directly extracting the IMG tag: * - If there are duplicate attributes in the source there will only be one in the output. * - If there are single-quoted or unquoted attributes they will be double-quoted in the output. * - If there are named character references in the attribute values they may be replaced with their direct code points. E.g. `&hellip;` becomes `…`. * In the future there will likely be a mechanism to copy snippets of HTML from * one document into another, via the HTML Processor's `get_outer_html()` or * equivalent. When that happens it would be appropriate to replace this custom * code with that canonical code. */ if ( $processor->next_tag( 'img' ) ) { $tag_html = new WP_HTML_Tag_Processor( '<img>' ); $tag_html->next_tag(); foreach ( $processor->get_attribute_names_with_prefix( '' ) as $name ) { $tag_html->set_attribute( $name, $processor->get_attribute( $name ) ); } $featured_image = $tag_html->get_updated_html(); } } if ( ! $featured_image ) { return ''; } if ( $is_link ) { $link_target = $attributes['linkTarget']; $rel = ! empty( $attributes['rel'] ) ? 'rel="' . esc_attr( $attributes['rel'] ) . '"' : ''; $height = ! empty( $attributes['height'] ) ? 'style="' . esc_attr( safecss_filter_attr( 'height:' . $attributes['height'] ) ) . '"' : ''; $featured_image = sprintf( '<a href="%1$s" target="%2$s" %3$s %4$s>%5$s%6$s</a>', get_the_permalink( $post_ID ), esc_attr( $link_target ), $rel, $height, $featured_image, $overlay_markup ); } else { $featured_image = $featured_image . $overlay_markup; } $aspect_ratio = ! empty( $attributes['aspectRatio'] ) ? esc_attr( safecss_filter_attr( 'aspect-ratio:' . $attributes['aspectRatio'] ) ) . ';' : ''; $width = ! empty( $attributes['width'] ) ? esc_attr( safecss_filter_attr( 'width:' . $attributes['width'] ) ) . ';' : ''; $height = ! empty( $attributes['height'] ) ? esc_attr( safecss_filter_attr( 'height:' . $attributes['height'] ) ) . ';' : ''; if ( ! $height && ! $width && ! $aspect_ratio ) { $wrapper_attributes = get_block_wrapper_attributes(); } else { $wrapper_attributes = get_block_wrapper_attributes( array( 'style' => $aspect_ratio . $width . $height ) ); } return "<figure {$wrapper_attributes}>{$featured_image}</figure>"; } /** * Generate markup for the HTML element that will be used for the overlay. * * @since 6.1.0 * * @param array $attributes Block attributes. * * @return string HTML markup in string format. */ function get_block_core_post_featured_image_overlay_element_markup( $attributes ) { $has_dim_background = isset( $attributes['dimRatio'] ) && $attributes['dimRatio']; $has_gradient = isset( $attributes['gradient'] ) && $attributes['gradient']; $has_custom_gradient = isset( $attributes['customGradient'] ) && $attributes['customGradient']; $has_solid_overlay = isset( $attributes['overlayColor'] ) && $attributes['overlayColor']; $has_custom_overlay = isset( $attributes['customOverlayColor'] ) && $attributes['customOverlayColor']; $class_names = array( 'wp-block-post-featured-image__overlay' ); $styles = array(); if ( ! $has_dim_background ) { return ''; } // Apply border classes and styles. $border_attributes = get_block_core_post_featured_image_border_attributes( $attributes ); if ( ! empty( $border_attributes['class'] ) ) { $class_names[] = $border_attributes['class']; } if ( ! empty( $border_attributes['style'] ) ) { $styles[] = $border_attributes['style']; } // Apply overlay and gradient classes. if ( $has_dim_background ) { $class_names[] = 'has-background-dim'; $class_names[] = "has-background-dim-{$attributes['dimRatio']}"; } if ( $has_solid_overlay ) { $class_names[] = "has-{$attributes['overlayColor']}-background-color"; } if ( $has_gradient || $has_custom_gradient ) { $class_names[] = 'has-background-gradient'; } if ( $has_gradient ) { $class_names[] = "has-{$attributes['gradient']}-gradient-background"; } // Apply background styles. if ( $has_custom_gradient ) { $styles[] = sprintf( 'background-image: %s;', $attributes['customGradient'] ); } if ( $has_custom_overlay ) { $styles[] = sprintf( 'background-color: %s;', $attributes['customOverlayColor'] ); } return sprintf( '<span class="%s" style="%s" aria-hidden="true"></span>', esc_attr( implode( ' ', $class_names ) ), esc_attr( safecss_filter_attr( implode( ' ', $styles ) ) ) ); } /** * Generates class names and styles to apply the border support styles for * the Post Featured Image block. * * @since 6.1.0 * * @param array $attributes The block attributes. * @return array The border-related classnames and styles for the block. */ function get_block_core_post_featured_image_border_attributes( $attributes ) { $border_styles = array(); $sides = array( 'top', 'right', 'bottom', 'left' ); // Border radius. if ( isset( $attributes['style']['border']['radius'] ) ) { $border_styles['radius'] = $attributes['style']['border']['radius']; } // Border style. if ( isset( $attributes['style']['border']['style'] ) ) { $border_styles['style'] = $attributes['style']['border']['style']; } // Border width. if ( isset( $attributes['style']['border']['width'] ) ) { $border_styles['width'] = $attributes['style']['border']['width']; } // Border color. $preset_color = array_key_exists( 'borderColor', $attributes ) ? "var:preset|color|{$attributes['borderColor']}" : null; $custom_color = $attributes['style']['border']['color'] ?? null; $border_styles['color'] = $preset_color ? $preset_color : $custom_color; // Individual border styles e.g. top, left etc. foreach ( $sides as $side ) { $border = $attributes['style']['border'][ $side ] ?? null; $border_styles[ $side ] = array( 'color' => isset( $border['color'] ) ? $border['color'] : null, 'style' => isset( $border['style'] ) ? $border['style'] : null, 'width' => isset( $border['width'] ) ? $border['width'] : null, ); } $styles = wp_style_engine_get_styles( array( 'border' => $border_styles ) ); $attributes = array(); if ( ! empty( $styles['classnames'] ) ) { $attributes['class'] = $styles['classnames']; } if ( ! empty( $styles['css'] ) ) { $attributes['style'] = $styles['css']; } return $attributes; } /** * Registers the `core/post-featured-image` block on the server. * * @since 5.8.0 */ function register_block_core_post_featured_image() { register_block_type_from_metadata( __DIR__ . '/post-featured-image', array( 'render_callback' => 'render_block_core_post_featured_image', ) ); } add_action( 'init', 'register_block_core_post_featured_image' );