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   1  <?php
   2  /**
   3   * Widget API: WP_Widget_Pages class
   4   *
   5   * @package WordPress
   6   * @subpackage Widgets
   7   * @since 4.4.0
   8   */
   9  
  10  /**
  11   * Core class used to implement a Pages widget.
  12   *
  13   * @since 2.8.0
  14   *
  15   * @see WP_Widget
  16   */
  17  class WP_Widget_Pages extends WP_Widget {
  18  
  19      /**
  20       * Sets up a new Pages widget instance.
  21       *
  22       * @since 2.8.0
  23       */
  24  	public function __construct() {
  25          $widget_ops = array(
  26              'classname'                   => 'widget_pages',
  27              'description'                 => __( 'A list of your site&#8217;s Pages.' ),
  28              'customize_selective_refresh' => true,
  29              'show_instance_in_rest'       => true,
  30          );
  31          parent::__construct( 'pages', __( 'Pages' ), $widget_ops );
  32      }
  33  
  34      /**
  35       * Outputs the content for the current Pages widget instance.
  36       *
  37       * @since 2.8.0
  38       *
  39       * @param array $args     Display arguments including 'before_title', 'after_title',
  40       *                        'before_widget', and 'after_widget'.
  41       * @param array $instance Settings for the current Pages widget instance.
  42       */
  43  	public function widget( $args, $instance ) {
  44          $default_title = __( 'Pages' );
  45          $title         = ! empty( $instance['title'] ) ? $instance['title'] : $default_title;
  46  
  47          /**
  48           * Filters the widget title.
  49           *
  50           * @since 2.6.0
  51           *
  52           * @param string $title    The widget title. Default 'Pages'.
  53           * @param array  $instance Array of settings for the current widget.
  54           * @param mixed  $id_base  The widget ID.
  55           */
  56          $title = apply_filters( 'widget_title', $title, $instance, $this->id_base );
  57  
  58          $sortby  = empty( $instance['sortby'] ) ? 'menu_order' : $instance['sortby'];
  59          $exclude = empty( $instance['exclude'] ) ? '' : $instance['exclude'];
  60  
  61          if ( 'menu_order' === $sortby ) {
  62              $sortby = 'menu_order, post_title';
  63          }
  64  
  65          $output = wp_list_pages(
  66              /**
  67               * Filters the arguments for the Pages widget.
  68               *
  69               * @since 2.8.0
  70               * @since 4.9.0 Added the `$instance` parameter.
  71               *
  72               * @see wp_list_pages()
  73               *
  74               * @param array $args     An array of arguments to retrieve the pages list.
  75               * @param array $instance Array of settings for the current widget.
  76               */
  77              apply_filters(
  78                  'widget_pages_args',
  79                  array(
  80                      'title_li'    => '',
  81                      'echo'        => 0,
  82                      'sort_column' => $sortby,
  83                      'exclude'     => $exclude,
  84                  ),
  85                  $instance
  86              )
  87          );
  88  
  89          if ( ! empty( $output ) ) {
  90              echo $args['before_widget'];
  91              if ( $title ) {
  92                  echo $args['before_title'] . $title . $args['after_title'];
  93              }
  94  
  95              $format = current_theme_supports( 'html5', 'navigation-widgets' ) ? 'html5' : 'xhtml';
  96  
  97              /** This filter is documented in wp-includes/widgets/class-wp-nav-menu-widget.php */
  98              $format = apply_filters( 'navigation_widgets_format', $format );
  99  
 100              if ( 'html5' === $format ) {
 101                  // The title may be filtered: Strip out HTML and make sure the aria-label is never empty.
 102                  $title      = trim( strip_tags( $title ) );
 103                  $aria_label = $title ? $title : $default_title;
 104                  echo '<nav aria-label="' . esc_attr( $aria_label ) . '">';
 105              }
 106              ?>
 107  
 108              <ul>
 109                  <?php echo $output; ?>
 110              </ul>
 111  
 112              <?php
 113              if ( 'html5' === $format ) {
 114                  echo '</nav>';
 115              }
 116  
 117              echo $args['after_widget'];
 118          }
 119      }
 120  
 121      /**
 122       * Handles updating settings for the current Pages widget instance.
 123       *
 124       * @since 2.8.0
 125       *
 126       * @param array $new_instance New settings for this instance as input by the user via
 127       *                            WP_Widget::form().
 128       * @param array $old_instance Old settings for this instance.
 129       * @return array Updated settings to save.
 130       */
 131  	public function update( $new_instance, $old_instance ) {
 132          $instance          = $old_instance;
 133          $instance['title'] = sanitize_text_field( $new_instance['title'] );
 134          if ( in_array( $new_instance['sortby'], array( 'post_title', 'menu_order', 'ID' ), true ) ) {
 135              $instance['sortby'] = $new_instance['sortby'];
 136          } else {
 137              $instance['sortby'] = 'menu_order';
 138          }
 139  
 140          $instance['exclude'] = sanitize_text_field( $new_instance['exclude'] );
 141  
 142          return $instance;
 143      }
 144  
 145      /**
 146       * Outputs the settings form for the Pages widget.
 147       *
 148       * @since 2.8.0
 149       *
 150       * @param array $instance Current settings.
 151       */
 152  	public function form( $instance ) {
 153          // Defaults.
 154          $instance = wp_parse_args(
 155              (array) $instance,
 156              array(
 157                  'sortby'  => 'post_title',
 158                  'title'   => '',
 159                  'exclude' => '',
 160              )
 161          );
 162          ?>
 163          <p>
 164              <label for="<?php echo esc_attr( $this->get_field_id( 'title' ) ); ?>"><?php _e( 'Title:' ); ?></label>
 165              <input class="widefat" id="<?php echo esc_attr( $this->get_field_id( 'title' ) ); ?>" name="<?php echo esc_attr( $this->get_field_name( 'title' ) ); ?>" type="text" value="<?php echo esc_attr( $instance['title'] ); ?>" />
 166          </p>
 167  
 168          <p>
 169              <label for="<?php echo esc_attr( $this->get_field_id( 'sortby' ) ); ?>"><?php _e( 'Sort by:' ); ?></label>
 170              <select name="<?php echo esc_attr( $this->get_field_name( 'sortby' ) ); ?>" id="<?php echo esc_attr( $this->get_field_id( 'sortby' ) ); ?>" class="widefat">
 171                  <option value="post_title"<?php selected( $instance['sortby'], 'post_title' ); ?>><?php _e( 'Page title' ); ?></option>
 172                  <option value="menu_order"<?php selected( $instance['sortby'], 'menu_order' ); ?>><?php _e( 'Page order' ); ?></option>
 173                  <option value="ID"<?php selected( $instance['sortby'], 'ID' ); ?>><?php _e( 'Page ID' ); ?></option>
 174              </select>
 175          </p>
 176  
 177          <p>
 178              <label for="<?php echo esc_attr( $this->get_field_id( 'exclude' ) ); ?>"><?php _e( 'Exclude:' ); ?></label>
 179              <input type="text" value="<?php echo esc_attr( $instance['exclude'] ); ?>" name="<?php echo esc_attr( $this->get_field_name( 'exclude' ) ); ?>" id="<?php echo esc_attr( $this->get_field_id( 'exclude' ) ); ?>" class="widefat" />
 180              <br />
 181              <small><?php _e( 'Page IDs, separated by commas.' ); ?></small>
 182          </p>
 183          <?php
 184      }
 185  
 186  }