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   1  <?php
   2  /**
   3   * Server-side rendering of the `core/navigation-submenu` block.
   4   *
   5   * @package WordPress
   6   */
   7  
   8  /**
   9   * Build an array with CSS classes and inline styles defining the font sizes
  10   * which will be applied to the navigation markup in the front-end.
  11   *
  12   * @since 5.9.0
  13   *
  14   * @param  array $context Navigation block context.
  15   * @return array Font size CSS classes and inline styles.
  16   */
  17  function block_core_navigation_submenu_build_css_font_sizes( $context ) {
  18      // CSS classes.
  19      $font_sizes = array(
  20          'css_classes'   => array(),
  21          'inline_styles' => '',
  22      );
  23  
  24      $has_named_font_size  = array_key_exists( 'fontSize', $context );
  25      $has_custom_font_size = isset( $context['style']['typography']['fontSize'] );
  26  
  27      if ( $has_named_font_size ) {
  28          // Add the font size class.
  29          $font_sizes['css_classes'][] = sprintf( 'has-%s-font-size', $context['fontSize'] );
  30      } elseif ( $has_custom_font_size ) {
  31          // Add the custom font size inline style.
  32          $font_sizes['inline_styles'] = sprintf(
  33              'font-size: %s;',
  34              wp_get_typography_font_size_value(
  35                  array(
  36                      'size' => $context['style']['typography']['fontSize'],
  37                  )
  38              )
  39          );
  40      }
  41  
  42      return $font_sizes;
  43  }
  44  
  45  /**
  46   * Returns the top-level submenu SVG chevron icon.
  47   *
  48   * @since 5.9.0
  49   *
  50   * @return string
  51   */
  52  function block_core_navigation_submenu_render_submenu_icon() {
  53      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>';
  54  }
  55  
  56  /**
  57   * Renders the `core/navigation-submenu` block.
  58   *
  59   * @since 5.9.0
  60   *
  61   * @param array    $attributes The block attributes.
  62   * @param string   $content    The saved content.
  63   * @param WP_Block $block      The parsed block.
  64   *
  65   * @return string Returns the post content with the legacy widget added.
  66   */
  67  function render_block_core_navigation_submenu( $attributes, $content, $block ) {
  68      $navigation_link_has_id = isset( $attributes['id'] ) && is_numeric( $attributes['id'] );
  69      $is_post_type           = isset( $attributes['kind'] ) && 'post-type' === $attributes['kind'];
  70      $is_post_type           = $is_post_type || isset( $attributes['type'] ) && ( 'post' === $attributes['type'] || 'page' === $attributes['type'] );
  71  
  72      // Don't render the block's subtree if it is a draft.
  73      if ( $is_post_type && $navigation_link_has_id && 'publish' !== get_post_status( $attributes['id'] ) ) {
  74          return '';
  75      }
  76  
  77      // Don't render the block's subtree if it has no label.
  78      if ( empty( $attributes['label'] ) ) {
  79          return '';
  80      }
  81  
  82      $font_sizes      = block_core_navigation_submenu_build_css_font_sizes( $block->context );
  83      $style_attribute = $font_sizes['inline_styles'];
  84  
  85      $css_classes = trim( implode( ' ', $font_sizes['css_classes'] ) );
  86      $has_submenu = count( $block->inner_blocks ) > 0;
  87      $kind        = empty( $attributes['kind'] ) ? 'post_type' : str_replace( '-', '_', $attributes['kind'] );
  88      $is_active   = ! empty( $attributes['id'] ) && get_queried_object_id() === (int) $attributes['id'] && ! empty( get_queried_object()->$kind );
  89  
  90      if ( is_post_type_archive() ) {
  91          $queried_archive_link = get_post_type_archive_link( get_queried_object()->name );
  92          if ( $attributes['url'] === $queried_archive_link ) {
  93              $is_active = true;
  94          }
  95      }
  96  
  97      $show_submenu_indicators = isset( $block->context['showSubmenuIcon'] ) && $block->context['showSubmenuIcon'];
  98      $open_on_click           = isset( $block->context['openSubmenusOnClick'] ) && $block->context['openSubmenusOnClick'];
  99      $open_on_hover_and_click = isset( $block->context['openSubmenusOnClick'] ) && ! $block->context['openSubmenusOnClick'] &&
 100          $show_submenu_indicators;
 101  
 102      $wrapper_attributes = get_block_wrapper_attributes(
 103          array(
 104              'class' => $css_classes . ' wp-block-navigation-item' . ( $has_submenu ? ' has-child' : '' ) .
 105              ( $open_on_click ? ' open-on-click' : '' ) . ( $open_on_hover_and_click ? ' open-on-hover-click' : '' ) .
 106              ( $is_active ? ' current-menu-item' : '' ),
 107              'style' => $style_attribute,
 108          )
 109      );
 110  
 111      $label = '';
 112  
 113      if ( isset( $attributes['label'] ) ) {
 114          $label .= wp_kses_post( $attributes['label'] );
 115      }
 116  
 117      $aria_label = sprintf(
 118          /* translators: Accessibility text. %s: Parent page title. */
 119          __( '%s submenu' ),
 120          wp_strip_all_tags( $label )
 121      );
 122  
 123      $html = '<li ' . $wrapper_attributes . '>';
 124  
 125      // If Submenus open on hover, we render an anchor tag with attributes.
 126      // If submenu icons are set to show, we also render a submenu button, so the submenu can be opened on click.
 127      if ( ! $open_on_click ) {
 128          $item_url = isset( $attributes['url'] ) ? $attributes['url'] : '';
 129          // Start appending HTML attributes to anchor tag.
 130          $html .= '<a class="wp-block-navigation-item__content"';
 131  
 132          // The href attribute on a and area elements is not required;
 133          // when those elements do not have href attributes they do not create hyperlinks.
 134          // But also The href attribute must have a value that is a valid URL potentially
 135          // surrounded by spaces.
 136          // see: https://html.spec.whatwg.org/multipage/links.html#links-created-by-a-and-area-elements.
 137          if ( ! empty( $item_url ) ) {
 138              $html .= ' href="' . esc_url( $item_url ) . '"';
 139          }
 140  
 141          if ( $is_active ) {
 142              $html .= ' aria-current="page"';
 143          }
 144  
 145          if ( isset( $attributes['opensInNewTab'] ) && true === $attributes['opensInNewTab'] ) {
 146              $html .= ' target="_blank"  ';
 147          }
 148  
 149          if ( isset( $attributes['rel'] ) ) {
 150              $html .= ' rel="' . esc_attr( $attributes['rel'] ) . '"';
 151          } elseif ( isset( $attributes['nofollow'] ) && $attributes['nofollow'] ) {
 152              $html .= ' rel="nofollow"';
 153          }
 154  
 155          if ( isset( $attributes['title'] ) ) {
 156              $html .= ' title="' . esc_attr( $attributes['title'] ) . '"';
 157          }
 158  
 159          $html .= '>';
 160          // End appending HTML attributes to anchor tag.
 161  
 162          $html .= $label;
 163  
 164          $html .= '</a>';
 165          // End anchor tag content.
 166  
 167          if ( $show_submenu_indicators ) {
 168              // The submenu icon is rendered in a button here
 169              // so that there's a clickable element to open the submenu.
 170              $html .= '<button aria-label="' . esc_attr( $aria_label ) . '" class="wp-block-navigation__submenu-icon wp-block-navigation-submenu__toggle" aria-expanded="false">' . block_core_navigation_submenu_render_submenu_icon() . '</button>';
 171          }
 172      } else {
 173          // If menus open on click, we render the parent as a button.
 174          $html .= '<button aria-label="' . esc_attr( $aria_label ) . '" class="wp-block-navigation-item__content wp-block-navigation-submenu__toggle" aria-expanded="false">';
 175  
 176          // Wrap title with span to isolate it from submenu icon.
 177          $html .= '<span class="wp-block-navigation-item__label">';
 178  
 179          $html .= $label;
 180  
 181          $html .= '</span>';
 182  
 183          $html .= '</button>';
 184  
 185          $html .= '<span class="wp-block-navigation__submenu-icon">' . block_core_navigation_submenu_render_submenu_icon() . '</span>';
 186  
 187      }
 188  
 189      if ( $has_submenu ) {
 190          // Copy some attributes from the parent block to this one.
 191          // Ideally this would happen in the client when the block is created.
 192          if ( array_key_exists( 'overlayTextColor', $block->context ) ) {
 193              $attributes['textColor'] = $block->context['overlayTextColor'];
 194          }
 195          if ( array_key_exists( 'overlayBackgroundColor', $block->context ) ) {
 196              $attributes['backgroundColor'] = $block->context['overlayBackgroundColor'];
 197          }
 198          if ( array_key_exists( 'customOverlayTextColor', $block->context ) ) {
 199              $attributes['style']['color']['text'] = $block->context['customOverlayTextColor'];
 200          }
 201          if ( array_key_exists( 'customOverlayBackgroundColor', $block->context ) ) {
 202              $attributes['style']['color']['background'] = $block->context['customOverlayBackgroundColor'];
 203          }
 204  
 205          // This allows us to be able to get a response from wp_apply_colors_support.
 206          $block->block_type->supports['color'] = true;
 207          $colors_supports                      = wp_apply_colors_support( $block->block_type, $attributes );
 208          $css_classes                          = 'wp-block-navigation__submenu-container';
 209          if ( array_key_exists( 'class', $colors_supports ) ) {
 210              $css_classes .= ' ' . $colors_supports['class'];
 211          }
 212  
 213          $style_attribute = '';
 214          if ( array_key_exists( 'style', $colors_supports ) ) {
 215              $style_attribute = $colors_supports['style'];
 216          }
 217  
 218          $inner_blocks_html = '';
 219          foreach ( $block->inner_blocks as $inner_block ) {
 220              $inner_blocks_html .= $inner_block->render();
 221          }
 222  
 223          if ( strpos( $inner_blocks_html, 'current-menu-item' ) ) {
 224              $tag_processor = new WP_HTML_Tag_Processor( $html );
 225              while ( $tag_processor->next_tag( array( 'class_name' => 'wp-block-navigation-item__content' ) ) ) {
 226                  $tag_processor->add_class( 'current-menu-ancestor' );
 227              }
 228              $html = $tag_processor->get_updated_html();
 229          }
 230  
 231          $wrapper_attributes = get_block_wrapper_attributes(
 232              array(
 233                  'class' => $css_classes,
 234                  'style' => $style_attribute,
 235              )
 236          );
 237  
 238          $html .= sprintf(
 239              '<ul %s>%s</ul>',
 240              $wrapper_attributes,
 241              $inner_blocks_html
 242          );
 243  
 244      }
 245  
 246      $html .= '</li>';
 247  
 248      return $html;
 249  }
 250  
 251  /**
 252   * Register the navigation submenu block.
 253   *
 254   * @since 5.9.0
 255   *
 256   * @uses render_block_core_navigation_submenu()
 257   * @throws WP_Error An WP_Error exception parsing the block definition.
 258   */
 259  function register_block_core_navigation_submenu() {
 260      register_block_type_from_metadata(
 261          __DIR__ . '/navigation-submenu',
 262          array(
 263              'render_callback' => 'render_block_core_navigation_submenu',
 264          )
 265      );
 266  }
 267  add_action( 'init', 'register_block_core_navigation_submenu' );