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- <?php
- /**
- * Server-side rendering of the `core/post-featured-image` block.
- *
- * @package WordPress
- */
- /**
- * Renders the `core/post-featured-image` block on the server.
- *
- * @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';
- $post_title = trim( strip_tags( get_the_title( $post_ID ) ) );
- $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 ) {
- $attr['alt'] = $post_title;
- }
- if ( ! empty( $attributes['height'] ) ) {
- $extra_styles = "height:{$attributes['height']};";
- if ( ! empty( $attributes['scale'] ) ) {
- $extra_styles .= "object-fit:{$attributes['scale']};";
- }
- $attr['style'] = empty( $attr['style'] ) ? $extra_styles : $attr['style'] . $extra_styles;
- }
- $featured_image = get_the_post_thumbnail( $post_ID, $size_slug, $attr );
- if ( ! $featured_image ) {
- return '';
- }
- if ( $is_link ) {
- $link_target = $attributes['linkTarget'];
- $rel = ! empty( $attributes['rel'] ) ? 'rel="' . esc_attr( $attributes['rel'] ) . '"' : '';
- $featured_image = sprintf(
- '<a href="%1$s" target="%2$s" %3$s>%4$s%5$s</a>',
- get_the_permalink( $post_ID ),
- esc_attr( $link_target ),
- $rel,
- $featured_image,
- $overlay_markup
- );
- } else {
- $featured_image = $featured_image . $overlay_markup;
- }
- $wrapper_attributes = empty( $attributes['width'] )
- ? get_block_wrapper_attributes()
- : get_block_wrapper_attributes( array( 'style' => "width:{$attributes['width']};" ) );
- return "<figure {$wrapper_attributes}>{$featured_image}</figure>";
- }
- /**
- * Generate markup for the HTML element that will be used for the overlay.
- *
- * @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.
- *
- * @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 = _wp_array_get( $attributes, array( '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 = _wp_array_get( $attributes, array( '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.
- */
- 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' );
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