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   1  <?php
   2  /**
   3   * Widget API: WP_Widget_Block class
   4   *
   5   * @package WordPress
   6   * @subpackage Widgets
   7   * @since 5.8.0
   8   */
   9  
  10  /**
  11   * Core class used to implement a Block widget.
  12   *
  13   * @since 5.8.0
  14   *
  15   * @see WP_Widget
  16   */
  17  class WP_Widget_Block extends WP_Widget {
  18  
  19      /**
  20       * Default instance.
  21       *
  22       * @since 5.8.0
  23       * @var array
  24       */
  25      protected $default_instance = array(
  26          'content' => '',
  27      );
  28  
  29      /**
  30       * Sets up a new Block widget instance.
  31       *
  32       * @since 5.8.0
  33       */
  34  	public function __construct() {
  35          $widget_ops  = array(
  36              'classname'                   => 'widget_block',
  37              'description'                 => __( 'A widget containing a block.' ),
  38              'customize_selective_refresh' => true,
  39              'show_instance_in_rest'       => true,
  40          );
  41          $control_ops = array(
  42              'width'  => 400,
  43              'height' => 350,
  44          );
  45          parent::__construct( 'block', __( 'Block' ), $widget_ops, $control_ops );
  46  
  47          add_filter( 'is_wide_widget_in_customizer', array( $this, 'set_is_wide_widget_in_customizer' ), 10, 2 );
  48      }
  49  
  50      /**
  51       * Outputs the content for the current Block widget instance.
  52       *
  53       * @since 5.8.0
  54       *
  55       * @param array $args     Display arguments including 'before_title', 'after_title',
  56       *                        'before_widget', and 'after_widget'.
  57       * @param array $instance Settings for the current Block widget instance.
  58       */
  59  	public function widget( $args, $instance ) {
  60          $instance = wp_parse_args( $instance, $this->default_instance );
  61  
  62          echo str_replace(
  63              'widget_block',
  64              $this->get_dynamic_classname( $instance['content'] ),
  65              $args['before_widget']
  66          );
  67  
  68          /**
  69           * Filters the content of the Block widget before output.
  70           *
  71           * @since 5.8.0
  72           *
  73           * @param string          $content  The widget content.
  74           * @param array           $instance Array of settings for the current widget.
  75           * @param WP_Widget_Block $widget   Current Block widget instance.
  76           */
  77          echo apply_filters(
  78              'widget_block_content',
  79              $instance['content'],
  80              $instance,
  81              $this
  82          );
  83  
  84          echo $args['after_widget'];
  85      }
  86  
  87      /**
  88       * Calculates the classname to use in the block widget's container HTML.
  89       *
  90       * Usually this is set to `$this->widget_options['classname']` by
  91       * dynamic_sidebar(). In this case, however, we want to set the classname
  92       * dynamically depending on the block contained by this block widget.
  93       *
  94       * If a block widget contains a block that has an equivalent legacy widget,
  95       * we display that legacy widget's class name. This helps with theme
  96       * backwards compatibility.
  97       *
  98       * @since 5.8.0
  99       *
 100       * @param string $content The HTML content of the current block widget.
 101       * @return string The classname to use in the block widget's container HTML.
 102       */
 103  	private function get_dynamic_classname( $content ) {
 104          $blocks = parse_blocks( $content );
 105  
 106          $block_name = isset( $blocks[0] ) ? $blocks[0]['blockName'] : null;
 107  
 108          switch ( $block_name ) {
 109              case 'core/paragraph':
 110                  $classname = 'widget_block widget_text';
 111                  break;
 112              case 'core/calendar':
 113                  $classname = 'widget_block widget_calendar';
 114                  break;
 115              case 'core/search':
 116                  $classname = 'widget_block widget_search';
 117                  break;
 118              case 'core/html':
 119                  $classname = 'widget_block widget_custom_html';
 120                  break;
 121              case 'core/archives':
 122                  $classname = 'widget_block widget_archive';
 123                  break;
 124              case 'core/latest-posts':
 125                  $classname = 'widget_block widget_recent_entries';
 126                  break;
 127              case 'core/latest-comments':
 128                  $classname = 'widget_block widget_recent_comments';
 129                  break;
 130              case 'core/tag-cloud':
 131                  $classname = 'widget_block widget_tag_cloud';
 132                  break;
 133              case 'core/categories':
 134                  $classname = 'widget_block widget_categories';
 135                  break;
 136              case 'core/audio':
 137                  $classname = 'widget_block widget_media_audio';
 138                  break;
 139              case 'core/video':
 140                  $classname = 'widget_block widget_media_video';
 141                  break;
 142              case 'core/image':
 143                  $classname = 'widget_block widget_media_image';
 144                  break;
 145              case 'core/gallery':
 146                  $classname = 'widget_block widget_media_gallery';
 147                  break;
 148              case 'core/rss':
 149                  $classname = 'widget_block widget_rss';
 150                  break;
 151              default:
 152                  $classname = 'widget_block';
 153          }
 154  
 155          /**
 156           * The classname used in the block widget's container HTML.
 157           *
 158           * This can be set according to the name of the block contained by the block widget.
 159           *
 160           * @since 5.8.0
 161           *
 162           * @param string $classname  The classname to be used in the block widget's container HTML,
 163           *                           e.g. 'widget_block widget_text'.
 164           * @param string $block_name The name of the block contained by the block widget,
 165           *                           e.g. 'core/paragraph'.
 166           */
 167          return apply_filters( 'widget_block_dynamic_classname', $classname, $block_name );
 168      }
 169  
 170      /**
 171       * Handles updating settings for the current Block widget instance.
 172       *
 173       * @since 5.8.0
 174  
 175       * @param array $new_instance New settings for this instance as input by the user via
 176       *                            WP_Widget::form().
 177       * @param array $old_instance Old settings for this instance.
 178       * @return array Settings to save or bool false to cancel saving.
 179       */
 180  	public function update( $new_instance, $old_instance ) {
 181          $instance = array_merge( $this->default_instance, $old_instance );
 182  
 183          if ( current_user_can( 'unfiltered_html' ) ) {
 184              $instance['content'] = $new_instance['content'];
 185          } else {
 186              $instance['content'] = wp_kses_post( $new_instance['content'] );
 187          }
 188  
 189          return $instance;
 190      }
 191  
 192      /**
 193       * Outputs the Block widget settings form.
 194       *
 195       * @since 5.8.0
 196       *
 197       * @see WP_Widget_Custom_HTML::render_control_template_scripts()
 198       *
 199       * @param array $instance Current instance.
 200       */
 201  	public function form( $instance ) {
 202          $instance = wp_parse_args( (array) $instance, $this->default_instance );
 203          ?>
 204          <p>
 205              <label for="<?php echo $this->get_field_id( 'content' ); ?>">
 206                  <?php
 207                  /* translators: HTML code of the block, not an option that blocks HTML. */
 208                  _e( 'Block HTML:' );
 209                  ?>
 210              </label>
 211              <textarea id="<?php echo $this->get_field_id( 'content' ); ?>" name="<?php echo $this->get_field_name( 'content' ); ?>" rows="6" cols="50" class="widefat code"><?php echo esc_textarea( $instance['content'] ); ?></textarea>
 212          </p>
 213          <?php
 214      }
 215  
 216      /**
 217       * Makes sure no block widget is considered to be wide.
 218       *
 219       * @since 5.8.0
 220       *
 221       * @param bool   $is_wide   Whether the widget is considered wide.
 222       * @param string $widget_id Widget ID.
 223       * @return bool Updated `is_wide` value.
 224       */
 225  	public function set_is_wide_widget_in_customizer( $is_wide, $widget_id ) {
 226          if ( strpos( $widget_id, 'block-' ) === 0 ) {
 227              return false;
 228          }
 229  
 230          return $is_wide;
 231      }
 232  }