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   1  <?php
   2  
   3  /**
   4   * Sets a custom slug when creating auto-draft template parts.
   5   *
   6   * This is only needed for auto-drafts created by the regular WP editor.
   7   * If this page is to be removed, this will not be necessary.
   8   *
   9   * @since 5.9.0
  10   *
  11   * @param int $post_id Post ID.
  12   */
  13  function wp_set_unique_slug_on_create_template_part( $post_id ) {
  14      $post = get_post( $post_id );
  15      if ( 'auto-draft' !== $post->post_status ) {
  16          return;
  17      }
  18  
  19      if ( ! $post->post_name ) {
  20          wp_update_post(
  21              array(
  22                  'ID'        => $post_id,
  23                  'post_name' => 'custom_slug_' . uniqid(),
  24              )
  25          );
  26      }
  27  
  28      $terms = get_the_terms( $post_id, 'wp_theme' );
  29      if ( ! is_array( $terms ) || ! count( $terms ) ) {
  30          wp_set_post_terms( $post_id, get_stylesheet(), 'wp_theme' );
  31      }
  32  }
  33  
  34  /**
  35   * Generates a unique slug for templates.
  36   *
  37   * @access private
  38   * @since 5.8.0
  39   *
  40   * @param string $override_slug The filtered value of the slug (starts as `null` from apply_filter).
  41   * @param string $slug          The original/un-filtered slug (post_name).
  42   * @param int    $post_id       Post ID.
  43   * @param string $post_status   No uniqueness checks are made if the post is still draft or pending.
  44   * @param string $post_type     Post type.
  45   * @return string The original, desired slug.
  46   */
  47  function wp_filter_wp_template_unique_post_slug( $override_slug, $slug, $post_id, $post_status, $post_type ) {
  48      if ( 'wp_template' !== $post_type && 'wp_template_part' !== $post_type ) {
  49          return $override_slug;
  50      }
  51  
  52      if ( ! $override_slug ) {
  53          $override_slug = $slug;
  54      }
  55  
  56      /*
  57       * Template slugs must be unique within the same theme.
  58       * TODO - Figure out how to update this to work for a multi-theme environment.
  59       * Unfortunately using `get_the_terms()` for the 'wp-theme' term does not work
  60       * in the case of new entities since is too early in the process to have been saved
  61       * to the entity. So for now we use the currently activated theme for creation.
  62       */
  63      $theme = get_stylesheet();
  64      $terms = get_the_terms( $post_id, 'wp_theme' );
  65      if ( $terms && ! is_wp_error( $terms ) ) {
  66          $theme = $terms[0]->name;
  67      }
  68  
  69      $check_query_args = array(
  70          'post_name__in'  => array( $override_slug ),
  71          'post_type'      => $post_type,
  72          'posts_per_page' => 1,
  73          'no_found_rows'  => true,
  74          'post__not_in'   => array( $post_id ),
  75          'tax_query'      => array(
  76              array(
  77                  'taxonomy' => 'wp_theme',
  78                  'field'    => 'name',
  79                  'terms'    => $theme,
  80              ),
  81          ),
  82      );
  83      $check_query      = new WP_Query( $check_query_args );
  84      $posts            = $check_query->posts;
  85  
  86      if ( count( $posts ) > 0 ) {
  87          $suffix = 2;
  88          do {
  89              $query_args                  = $check_query_args;
  90              $alt_post_name               = _truncate_post_slug( $override_slug, 200 - ( strlen( $suffix ) + 1 ) ) . "-$suffix";
  91              $query_args['post_name__in'] = array( $alt_post_name );
  92              $query                       = new WP_Query( $query_args );
  93              ++$suffix;
  94          } while ( count( $query->posts ) > 0 );
  95          $override_slug = $alt_post_name;
  96      }
  97  
  98      return $override_slug;
  99  }
 100  
 101  /**
 102   * Enqueues the skip-link script & styles.
 103   *
 104   * @access private
 105   * @since 6.4.0
 106   *
 107   * @global string $_wp_current_template_content
 108   */
 109  function wp_enqueue_block_template_skip_link() {
 110      global $_wp_current_template_content;
 111  
 112      // Back-compat for plugins that disable functionality by unhooking this action.
 113      if ( ! has_action( 'wp_footer', 'the_block_template_skip_link' ) ) {
 114          return;
 115      }
 116      remove_action( 'wp_footer', 'the_block_template_skip_link' );
 117  
 118      // Early exit if not a block theme.
 119      if ( ! current_theme_supports( 'block-templates' ) ) {
 120          return;
 121      }
 122  
 123      // Early exit if not a block template.
 124      if ( ! $_wp_current_template_content ) {
 125          return;
 126      }
 127  
 128      $skip_link_styles = '
 129          .skip-link.screen-reader-text {
 130              border: 0;
 131              clip: rect(1px,1px,1px,1px);
 132              clip-path: inset(50%);
 133              height: 1px;
 134              margin: -1px;
 135              overflow: hidden;
 136              padding: 0;
 137              position: absolute !important;
 138              width: 1px;
 139              word-wrap: normal !important;
 140          }
 141  
 142          .skip-link.screen-reader-text:focus {
 143              background-color: #eee;
 144              clip: auto !important;
 145              clip-path: none;
 146              color: #444;
 147              display: block;
 148              font-size: 1em;
 149              height: auto;
 150              left: 5px;
 151              line-height: normal;
 152              padding: 15px 23px 14px;
 153              text-decoration: none;
 154              top: 5px;
 155              width: auto;
 156              z-index: 100000;
 157          }';
 158  
 159      $handle = 'wp-block-template-skip-link';
 160  
 161      /**
 162       * Print the skip-link styles.
 163       */
 164      wp_register_style( $handle, false );
 165      wp_add_inline_style( $handle, $skip_link_styles );
 166      wp_enqueue_style( $handle );
 167  
 168      /**
 169       * Enqueue the skip-link script.
 170       */
 171      ob_start();
 172      ?>
 173      <script>
 174      ( function() {
 175          var skipLinkTarget = document.querySelector( 'main' ),
 176              sibling,
 177              skipLinkTargetID,
 178              skipLink;
 179  
 180          // Early exit if a skip-link target can't be located.
 181          if ( ! skipLinkTarget ) {
 182              return;
 183          }
 184  
 185          /*
 186           * Get the site wrapper.
 187           * The skip-link will be injected in the beginning of it.
 188           */
 189          sibling = document.querySelector( '.wp-site-blocks' );
 190  
 191          // Early exit if the root element was not found.
 192          if ( ! sibling ) {
 193              return;
 194          }
 195  
 196          // Get the skip-link target's ID, and generate one if it doesn't exist.
 197          skipLinkTargetID = skipLinkTarget.id;
 198          if ( ! skipLinkTargetID ) {
 199              skipLinkTargetID = 'wp--skip-link--target';
 200              skipLinkTarget.id = skipLinkTargetID;
 201          }
 202  
 203          // Create the skip link.
 204          skipLink = document.createElement( 'a' );
 205          skipLink.classList.add( 'skip-link', 'screen-reader-text' );
 206          skipLink.id = 'wp-skip-link';
 207          skipLink.href = '#' + skipLinkTargetID;
 208          skipLink.innerHTML = '<?php /* translators: Hidden accessibility text. */ esc_html_e( 'Skip to content' ); ?>';
 209  
 210          // Inject the skip link.
 211          sibling.parentElement.insertBefore( skipLink, sibling );
 212      }() );
 213      </script>
 214      <?php
 215      $skip_link_script = wp_remove_surrounding_empty_script_tags( ob_get_clean() );
 216      $script_handle    = 'wp-block-template-skip-link';
 217      wp_register_script( $script_handle, false, array(), false, array( 'in_footer' => true ) );
 218      wp_add_inline_script( $script_handle, $skip_link_script );
 219      wp_enqueue_script( $script_handle );
 220  }
 221  
 222  /**
 223   * Enables the block templates (editor mode) for themes with theme.json by default.
 224   *
 225   * @access private
 226   * @since 5.8.0
 227   */
 228  function wp_enable_block_templates() {
 229      if ( wp_is_block_theme() || wp_theme_has_theme_json() ) {
 230          add_theme_support( 'block-templates' );
 231      }
 232  }