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class-wp-widget-categories.php (7064B)

---

 <?php
 /**
  * Widget API: WP_Widget_Categories class
  *
  * @package WordPress
  * @subpackage Widgets
  * @since 4.4.0
  */
 
 /**
  * Core class used to implement a Categories widget.
  *
  * @since 2.8.0
  *
  * @see WP_Widget
  */
 class WP_Widget_Categories extends WP_Widget {
 
 	/**
 	 * Sets up a new Categories widget instance.
 	 *
 	 * @since 2.8.0
 	 */
 	public function __construct() {
 		$widget_ops = array(
 			'classname'                   => 'widget_categories',
 			'description'                 => __( 'A list or dropdown of categories.' ),
 			'customize_selective_refresh' => true,
 			'show_instance_in_rest'       => true,
 		);
 		parent::__construct( 'categories', __( 'Categories' ), $widget_ops );
 	}
 
 	/**
 	 * Outputs the content for the current Categories widget instance.
 	 *
 	 * @since 2.8.0
 	 * @since 4.2.0 Creates a unique HTML ID for the `<select>` element
 	 *              if more than one instance is displayed on the page.
 	 *
 	 * @param array $args     Display arguments including 'before_title', 'after_title',
 	 *                        'before_widget', and 'after_widget'.
 	 * @param array $instance Settings for the current Categories widget instance.
 	 */
 	public function widget( $args, $instance ) {
 		static $first_dropdown = true;
 
 		$default_title = __( 'Categories' );
 		$title         = ! empty( $instance['title'] ) ? $instance['title'] : $default_title;
 
 		/** This filter is documented in wp-includes/widgets/class-wp-widget-pages.php */
 		$title = apply_filters( 'widget_title', $title, $instance, $this->id_base );
 
 		$count        = ! empty( $instance['count'] ) ? '1' : '0';
 		$hierarchical = ! empty( $instance['hierarchical'] ) ? '1' : '0';
 		$dropdown     = ! empty( $instance['dropdown'] ) ? '1' : '0';
 
 		echo $args['before_widget'];
 
 		if ( $title ) {
 			echo $args['before_title'] . $title . $args['after_title'];
 		}
 
 		$cat_args = array(
 			'orderby'      => 'name',
 			'show_count'   => $count,
 			'hierarchical' => $hierarchical,
 		);
 
 		if ( $dropdown ) {
 			printf( '<form action="%s" method="get">', esc_url( home_url() ) );
 			$dropdown_id    = ( $first_dropdown ) ? 'cat' : "{$this->id_base}-dropdown-{$this->number}";
 			$first_dropdown = false;
 
 			echo '<label class="screen-reader-text" for="' . esc_attr( $dropdown_id ) . '">' . $title . '</label>';
 
 			$cat_args['show_option_none'] = __( 'Select Category' );
 			$cat_args['id']               = $dropdown_id;
 
 			/**
 			 * Filters the arguments for the Categories widget drop-down.
 			 *
 			 * @since 2.8.0
 			 * @since 4.9.0 Added the `$instance` parameter.
 			 *
 			 * @see wp_dropdown_categories()
 			 *
 			 * @param array $cat_args An array of Categories widget drop-down arguments.
 			 * @param array $instance Array of settings for the current widget.
 			 */
 			wp_dropdown_categories( apply_filters( 'widget_categories_dropdown_args', $cat_args, $instance ) );
 
 			echo '</form>';
 
 			$type_attr = current_theme_supports( 'html5', 'script' ) ? '' : ' type="text/javascript"';
 			?>
 
 <script<?php echo $type_attr; ?>>
 /* <![CDATA[ */
 (function() {
 	var dropdown = document.getElementById( "<?php echo esc_js( $dropdown_id ); ?>" );
 	function onCatChange() {
 		if ( dropdown.options[ dropdown.selectedIndex ].value > 0 ) {
 			dropdown.parentNode.submit();
 		}
 	}
 	dropdown.onchange = onCatChange;
 })();
 /* ]]> */
 </script>
 
 			<?php
 		} else {
 			$format = current_theme_supports( 'html5', 'navigation-widgets' ) ? 'html5' : 'xhtml';
 
 			/** This filter is documented in wp-includes/widgets/class-wp-nav-menu-widget.php */
 			$format = apply_filters( 'navigation_widgets_format', $format );
 
 			if ( 'html5' === $format ) {
 				// The title may be filtered: Strip out HTML and make sure the aria-label is never empty.
 				$title      = trim( strip_tags( $title ) );
 				$aria_label = $title ? $title : $default_title;
 				echo '<nav role="navigation" aria-label="' . esc_attr( $aria_label ) . '">';
 			}
 			?>
 
 			<ul>
 				<?php
 				$cat_args['title_li'] = '';
 
 				/**
 				 * Filters the arguments for the Categories widget.
 				 *
 				 * @since 2.8.0
 				 * @since 4.9.0 Added the `$instance` parameter.
 				 *
 				 * @param array $cat_args An array of Categories widget options.
 				 * @param array $instance Array of settings for the current widget.
 				 */
 				wp_list_categories( apply_filters( 'widget_categories_args', $cat_args, $instance ) );
 				?>
 			</ul>
 
 			<?php
 			if ( 'html5' === $format ) {
 				echo '</nav>';
 			}
 		}
 
 		echo $args['after_widget'];
 	}
 
 	/**
 	 * Handles updating settings for the current Categories widget instance.
 	 *
 	 * @since 2.8.0
 	 *
 	 * @param array $new_instance New settings for this instance as input by the user via
 	 *                            WP_Widget::form().
 	 * @param array $old_instance Old settings for this instance.
 	 * @return array Updated settings to save.
 	 */
 	public function update( $new_instance, $old_instance ) {
 		$instance                 = $old_instance;
 		$instance['title']        = sanitize_text_field( $new_instance['title'] );
 		$instance['count']        = ! empty( $new_instance['count'] ) ? 1 : 0;
 		$instance['hierarchical'] = ! empty( $new_instance['hierarchical'] ) ? 1 : 0;
 		$instance['dropdown']     = ! empty( $new_instance['dropdown'] ) ? 1 : 0;
 
 		return $instance;
 	}
 
 	/**
 	 * Outputs the settings form for the Categories widget.
 	 *
 	 * @since 2.8.0
 	 *
 	 * @param array $instance Current settings.
 	 */
 	public function form( $instance ) {
 		// Defaults.
 		$instance     = wp_parse_args( (array) $instance, array( 'title' => '' ) );
 		$count        = isset( $instance['count'] ) ? (bool) $instance['count'] : false;
 		$hierarchical = isset( $instance['hierarchical'] ) ? (bool) $instance['hierarchical'] : false;
 		$dropdown     = isset( $instance['dropdown'] ) ? (bool) $instance['dropdown'] : false;
 		?>
 		<p>
 			<label for="<?php echo $this->get_field_id( 'title' ); ?>"><?php _e( 'Title:' ); ?></label>
 			<input class="widefat" id="<?php echo $this->get_field_id( 'title' ); ?>" name="<?php echo $this->get_field_name( 'title' ); ?>" type="text" value="<?php echo esc_attr( $instance['title'] ); ?>" />
 		</p>
 
 		<p>
 			<input type="checkbox" class="checkbox" id="<?php echo $this->get_field_id( 'dropdown' ); ?>" name="<?php echo $this->get_field_name( 'dropdown' ); ?>"<?php checked( $dropdown ); ?> />
 			<label for="<?php echo $this->get_field_id( 'dropdown' ); ?>"><?php _e( 'Display as dropdown' ); ?></label>
 			<br />
 
 			<input type="checkbox" class="checkbox" id="<?php echo $this->get_field_id( 'count' ); ?>" name="<?php echo $this->get_field_name( 'count' ); ?>"<?php checked( $count ); ?> />
 			<label for="<?php echo $this->get_field_id( 'count' ); ?>"><?php _e( 'Show post counts' ); ?></label>
 			<br />
 
 			<input type="checkbox" class="checkbox" id="<?php echo $this->get_field_id( 'hierarchical' ); ?>" name="<?php echo $this->get_field_name( 'hierarchical' ); ?>"<?php checked( $hierarchical ); ?> />
 			<label for="<?php echo $this->get_field_id( 'hierarchical' ); ?>"><?php _e( 'Show hierarchy' ); ?></label>
 		</p>
 		<?php
 	}
 
 }