<?php
/**
* Server-side rendering of the `core/navigation-link` block.
*
* @package WordPress
*/
/**
* Build an array with CSS classes and inline styles defining the colors
* which will be applied to the navigation markup in the front-end.
*
* @param array $context Navigation block context.
* @param array $attributes Block attributes.
* @return array Colors CSS classes and inline styles.
*/
function block_core_navigation_link_build_css_colors( $context, $attributes ) {
$colors = array(
'css_classes' => array(),
'inline_styles' => '',
);
$is_sub_menu = isset( $attributes['isTopLevelLink'] ) ? ( ! $attributes['isTopLevelLink'] ) : false;
// Text color.
$named_text_color = null;
$custom_text_color = null;
if ( $is_sub_menu && array_key_exists( 'customOverlayTextColor', $context ) ) {
$custom_text_color = $context['customOverlayTextColor'];
} elseif ( $is_sub_menu && array_key_exists( 'overlayTextColor', $context ) ) {
$named_text_color = $context['overlayTextColor'];
} elseif ( array_key_exists( 'customTextColor', $context ) ) {
$custom_text_color = $context['customTextColor'];
} elseif ( array_key_exists( 'textColor', $context ) ) {
$named_text_color = $context['textColor'];
} elseif ( isset( $context['style']['color']['text'] ) ) {
$custom_text_color = $context['style']['color']['text'];
}
// If has text color.
if ( ! is_null( $named_text_color ) ) {
// Add the color class.
array_push( $colors['css_classes'], 'has-text-color', sprintf( 'has-%s-color', $named_text_color ) );
} elseif ( ! is_null( $custom_text_color ) ) {
// Add the custom color inline style.
$colors['css_classes'][] = 'has-text-color';
$colors['inline_styles'] .= sprintf( 'color: %s;', $custom_text_color );
}
// Background color.
$named_background_color = null;
$custom_background_color = null;
if ( $is_sub_menu && array_key_exists( 'customOverlayBackgroundColor', $context ) ) {
$custom_background_color = $context['customOverlayBackgroundColor'];
} elseif ( $is_sub_menu && array_key_exists( 'overlayBackgroundColor', $context ) ) {
$named_background_color = $context['overlayBackgroundColor'];
} elseif ( array_key_exists( 'customBackgroundColor', $context ) ) {
$custom_background_color = $context['customBackgroundColor'];
} elseif ( array_key_exists( 'backgroundColor', $context ) ) {
$named_background_color = $context['backgroundColor'];
} elseif ( isset( $context['style']['color']['background'] ) ) {
$custom_background_color = $context['style']['color']['background'];
}
// If has background color.
if ( ! is_null( $named_background_color ) ) {
// Add the background-color class.
array_push( $colors['css_classes'], 'has-background', sprintf( 'has-%s-background-color', $named_background_color ) );
} elseif ( ! is_null( $custom_background_color ) ) {
// Add the custom background-color inline style.
$colors['css_classes'][] = 'has-background';
$colors['inline_styles'] .= sprintf( 'background-color: %s;', $custom_background_color );
}
return $colors;
}
/**
* Build an array with CSS classes and inline styles defining the font sizes
* which will be applied to the navigation markup in the front-end.
*
* @param array $context Navigation block context.
* @return array Font size CSS classes and inline styles.
*/
function block_core_navigation_link_build_css_font_sizes( $context ) {
// CSS classes.
$font_sizes = array(
'css_classes' => array(),
'inline_styles' => '',
);
$has_named_font_size = array_key_exists( 'fontSize', $context );
$has_custom_font_size = isset( $context['style']['typography']['fontSize'] );
if ( $has_named_font_size ) {
// Add the font size class.
$font_sizes['css_classes'][] = sprintf( 'has-%s-font-size', $context['fontSize'] );
} elseif ( $has_custom_font_size ) {
// Add the custom font size inline style.
$font_sizes['inline_styles'] = sprintf( 'font-size: %s;', $context['style']['typography']['fontSize'] );
}
return $font_sizes;
}
/**
* Returns the top-level submenu SVG chevron icon.
*
* @return string
*/
function block_core_navigation_link_render_submenu_icon() {
return '<svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" viewBox="0 0 12 12" fill="none" aria-hidden="true" focusable="false"><path d="M1.50002 4L6.00002 8L10.5 4" stroke-width="1.5"></path></svg>';
}
/**
* Renders the `core/navigation-link` block.
*
* @param array $attributes The block attributes.
* @param string $content The saved content.
* @param WP_Block $block The parsed block.
*
* @return string Returns the post content with the legacy widget added.
*/
function render_block_core_navigation_link( $attributes, $content, $block ) {
$navigation_link_has_id = isset( $attributes['id'] ) && is_numeric( $attributes['id'] );
$is_post_type = isset( $attributes['kind'] ) && 'post-type' === $attributes['kind'];
$is_post_type = $is_post_type || isset( $attributes['type'] ) && ( 'post' === $attributes['type'] || 'page' === $attributes['type'] );
// Don't render the block's subtree if it is a draft or if the ID does not exist.
if ( $is_post_type && $navigation_link_has_id ) {
$post = get_post( $attributes['id'] );
if ( ! $post || 'publish' !== $post->post_status ) {
return '';
}
}
// Don't render the block's subtree if it has no label.
if ( empty( $attributes['label'] ) ) {
return '';
}
$colors = block_core_navigation_link_build_css_colors( $block->context, $attributes );
$font_sizes = block_core_navigation_link_build_css_font_sizes( $block->context );
$classes = array_merge(
$colors['css_classes'],
$font_sizes['css_classes']
);
$style_attribute = ( $colors['inline_styles'] . $font_sizes['inline_styles'] );
$css_classes = trim( implode( ' ', $classes ) );
$has_submenu = count( $block->inner_blocks ) > 0;
$is_active = ! empty( $attributes['id'] ) && ( get_the_ID() === $attributes['id'] );
$wrapper_attributes = get_block_wrapper_attributes(
array(
'class' => $css_classes . ' wp-block-navigation-item' . ( $has_submenu ? ' has-child' : '' ) .
( $is_active ? ' current-menu-item' : '' ),
'style' => $style_attribute,
)
);
$html = '<li ' . $wrapper_attributes . '>' .
'<a class="wp-block-navigation-item__content" ';
// Start appending HTML attributes to anchor tag.
if ( isset( $attributes['url'] ) ) {
$html .= ' href="' . esc_url( $attributes['url'] ) . '"';
}
if ( $is_active ) {
$html .= ' aria-current="page"';
}
if ( isset( $attributes['opensInNewTab'] ) && true === $attributes['opensInNewTab'] ) {
$html .= ' target="_blank" ';
}
if ( isset( $attributes['rel'] ) ) {
$html .= ' rel="' . esc_attr( $attributes['rel'] ) . '"';
} elseif ( isset( $attributes['nofollow'] ) && $attributes['nofollow'] ) {
$html .= ' rel="nofollow"';
}
if ( isset( $attributes['title'] ) ) {
$html .= ' title="' . esc_attr( $attributes['title'] ) . '"';
}
// End appending HTML attributes to anchor tag.
// Start anchor tag content.
$html .= '>' .
// Wrap title with span to isolate it from submenu icon.
'<span class="wp-block-navigation-item__label">';
if ( isset( $attributes['label'] ) ) {
$html .= wp_kses_post( $attributes['label'] );
}
$html .= '</span>';
// Add description if available.
if ( ! empty( $attributes['description'] ) ) {
$html .= '<span class="wp-block-navigation-item__description">';
$html .= wp_kses_post( $attributes['description'] );
$html .= '</span>';
}
$html .= '</a>';
// End anchor tag content.
if ( isset( $block->context['showSubmenuIcon'] ) && $block->context['showSubmenuIcon'] && $has_submenu ) {
// The submenu icon can be hidden by a CSS rule on the Navigation Block.
$html .= '<span class="wp-block-navigation__submenu-icon">' . block_core_navigation_link_render_submenu_icon() . '</span>';
}
if ( $has_submenu ) {
$inner_blocks_html = '';
foreach ( $block->inner_blocks as $inner_block ) {
$inner_blocks_html .= $inner_block->render();
}
$html .= sprintf(
'<ul class="wp-block-navigation__submenu-container">%s</ul>',
$inner_blocks_html
);
}
$html .= '</li>';
return $html;
}
/**
* Returns a navigation link variation
*
* @param WP_Taxonomy|WP_Post_Type $entity post type or taxonomy entity.
* @param string $kind string of value 'taxonomy' or 'post-type'.
*
* @return array
*/
function build_variation_for_navigation_link( $entity, $kind ) {
$title = '';
$description = '';
if ( property_exists( $entity->labels, 'item_link' ) ) {
$title = $entity->labels->item_link;
}
if ( property_exists( $entity->labels, 'item_link_description' ) ) {
$description = $entity->labels->item_link_description;
}
$variation = array(
'name' => $entity->name,
'title' => $title,
'description' => $description,
'attributes' => array(
'type' => $entity->name,
'kind' => $kind,
),
);
// Tweak some value for the variations.
$variation_overrides = array(
'post_tag' => array(
'name' => 'tag',
'attributes' => array(
'type' => 'tag',
'kind' => $kind,
),
),
'post_format' => array(
// The item_link and item_link_description for post formats is the
// same as for tags, so need to be overridden.
'title' => __( 'Post Format Link' ),
'description' => __( 'A link to a post format' ),
'attributes' => array(
'type' => 'post_format',
'kind' => $kind,
),
),
);
if ( array_key_exists( $entity->name, $variation_overrides ) ) {
$variation = array_merge(
$variation,
$variation_overrides[ $entity->name ]
);
}
return $variation;
}
/**
* Register the navigation link block.
*
* @uses render_block_core_navigation()
* @throws WP_Error An WP_Error exception parsing the block definition.
*/
function register_block_core_navigation_link() {
$post_types = get_post_types( array( 'show_in_nav_menus' => true ), 'objects' );
$taxonomies = get_taxonomies( array( 'show_in_nav_menus' => true ), 'objects' );
// Use two separate arrays as a way to order the variations in the UI.
// Known variations (like Post Link and Page Link) are added to the
// `built_ins` array. Variations for custom post types and taxonomies are
// added to the `variations` array and will always appear after `built-ins.
$built_ins = array();
$variations = array();
if ( $post_types ) {
foreach ( $post_types as $post_type ) {
$variation = build_variation_for_navigation_link( $post_type, 'post-type' );
if ( $post_type->_builtin ) {
$built_ins[] = $variation;
} else {
$variations[] = $variation;
}
}
}
if ( $taxonomies ) {
foreach ( $taxonomies as $taxonomy ) {
$variation = build_variation_for_navigation_link( $taxonomy, 'taxonomy' );
if ( $taxonomy->_builtin ) {
$built_ins[] = $variation;
} else {
$variations[] = $variation;
}
}
}
register_block_type_from_metadata(
__DIR__ . '/navigation-link',
array(
'render_callback' => 'render_block_core_navigation_link',
'variations' => array_merge( $built_ins, $variations ),
)
);
}
add_action( 'init', 'register_block_core_navigation_link' );