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class-wp-widget-tag-cloud.php (6768B)

---

 <?php
 /**
  * Widget API: WP_Widget_Tag_Cloud class
  *
  * @package WordPress
  * @subpackage Widgets
  * @since 4.4.0
  */
 
 /**
  * Core class used to implement a Tag cloud widget.
  *
  * @since 2.8.0
  *
  * @see WP_Widget
  */
 class WP_Widget_Tag_Cloud extends WP_Widget {
 
 	/**
 	 * Sets up a new Tag Cloud widget instance.
 	 *
 	 * @since 2.8.0
 	 */
 	public function __construct() {
 		$widget_ops = array(
 			'description'                 => __( 'A cloud of your most used tags.' ),
 			'customize_selective_refresh' => true,
 			'show_instance_in_rest'       => true,
 		);
 		parent::__construct( 'tag_cloud', __( 'Tag Cloud' ), $widget_ops );
 	}
 
 	/**
 	 * Outputs the content for the current Tag Cloud widget instance.
 	 *
 	 * @since 2.8.0
 	 *
 	 * @param array $args     Display arguments including 'before_title', 'after_title',
 	 *                        'before_widget', and 'after_widget'.
 	 * @param array $instance Settings for the current Tag Cloud widget instance.
 	 */
 	public function widget( $args, $instance ) {
 		$current_taxonomy = $this->_get_current_taxonomy( $instance );
 
 		if ( ! empty( $instance['title'] ) ) {
 			$title = $instance['title'];
 		} else {
 			if ( 'post_tag' === $current_taxonomy ) {
 				$title = __( 'Tags' );
 			} else {
 				$tax   = get_taxonomy( $current_taxonomy );
 				$title = $tax->labels->name;
 			}
 		}
 
 		$show_count = ! empty( $instance['count'] );
 
 		$tag_cloud = wp_tag_cloud(
 			/**
 			 * Filters the taxonomy used in the Tag Cloud widget.
 			 *
 			 * @since 2.8.0
 			 * @since 3.0.0 Added taxonomy drop-down.
 			 * @since 4.9.0 Added the `$instance` parameter.
 			 *
 			 * @see wp_tag_cloud()
 			 *
 			 * @param array $args     Args used for the tag cloud widget.
 			 * @param array $instance Array of settings for the current widget.
 			 */
 			apply_filters(
 				'widget_tag_cloud_args',
 				array(
 					'taxonomy'   => $current_taxonomy,
 					'echo'       => false,
 					'show_count' => $show_count,
 				),
 				$instance
 			)
 		);
 
 		if ( empty( $tag_cloud ) ) {
 			return;
 		}
 
 		/** This filter is documented in wp-includes/widgets/class-wp-widget-pages.php */
 		$title = apply_filters( 'widget_title', $title, $instance, $this->id_base );
 
 		echo $args['before_widget'];
 		if ( $title ) {
 			echo $args['before_title'] . $title . $args['after_title'];
 		}
 
 		$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 ) . '">';
 		}
 
 		echo '<div class="tagcloud">';
 
 		echo $tag_cloud;
 
 		echo "</div>\n";
 
 		if ( 'html5' === $format ) {
 			echo '</nav>';
 		}
 
 		echo $args['after_widget'];
 	}
 
 	/**
 	 * Handles updating settings for the current Tag Cloud 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 Settings to save or bool false to cancel saving.
 	 */
 	public function update( $new_instance, $old_instance ) {
 		$instance             = array();
 		$instance['title']    = sanitize_text_field( $new_instance['title'] );
 		$instance['count']    = ! empty( $new_instance['count'] ) ? 1 : 0;
 		$instance['taxonomy'] = stripslashes( $new_instance['taxonomy'] );
 		return $instance;
 	}
 
 	/**
 	 * Outputs the Tag Cloud widget settings form.
 	 *
 	 * @since 2.8.0
 	 *
 	 * @param array $instance Current settings.
 	 */
 	public function form( $instance ) {
 		$title = ! empty( $instance['title'] ) ? $instance['title'] : '';
 		$count = isset( $instance['count'] ) ? (bool) $instance['count'] : false;
 		?>
 		<p>
 			<label for="<?php echo $this->get_field_id( 'title' ); ?>"><?php _e( 'Title:' ); ?></label>
 			<input type="text" class="widefat" id="<?php echo $this->get_field_id( 'title' ); ?>" name="<?php echo $this->get_field_name( 'title' ); ?>" value="<?php echo esc_attr( $title ); ?>" />
 		</p>
 		<?php
 		$taxonomies       = get_taxonomies( array( 'show_tagcloud' => true ), 'object' );
 		$current_taxonomy = $this->_get_current_taxonomy( $instance );
 
 		switch ( count( $taxonomies ) ) {
 
 			// No tag cloud supporting taxonomies found, display error message.
 			case 0:
 				?>
 				<input type="hidden" id="<?php echo $this->get_field_id( 'taxonomy' ); ?>" name="<?php echo $this->get_field_name( 'taxonomy' ); ?>" value="" />
 				<p>
 					<?php _e( 'The tag cloud will not be displayed since there are no taxonomies that support the tag cloud widget.' ); ?>
 				</p>
 				<?php
 				break;
 
 			// Just a single tag cloud supporting taxonomy found, no need to display a select.
 			case 1:
 				$keys     = array_keys( $taxonomies );
 				$taxonomy = reset( $keys );
 				?>
 				<input type="hidden" id="<?php echo $this->get_field_id( 'taxonomy' ); ?>" name="<?php echo $this->get_field_name( 'taxonomy' ); ?>" value="<?php echo esc_attr( $taxonomy ); ?>" />
 				<?php
 				break;
 
 			// More than one tag cloud supporting taxonomy found, display a select.
 			default:
 				?>
 				<p>
 					<label for="<?php echo $this->get_field_id( 'taxonomy' ); ?>"><?php _e( 'Taxonomy:' ); ?></label>
 					<select class="widefat" id="<?php echo $this->get_field_id( 'taxonomy' ); ?>" name="<?php echo $this->get_field_name( 'taxonomy' ); ?>">
 					<?php foreach ( $taxonomies as $taxonomy => $tax ) : ?>
 						<option value="<?php echo esc_attr( $taxonomy ); ?>" <?php selected( $taxonomy, $current_taxonomy ); ?>>
 							<?php echo esc_html( $tax->labels->name ); ?>
 						</option>
 					<?php endforeach; ?>
 					</select>
 				</p>
 				<?php
 		}
 
 		if ( count( $taxonomies ) > 0 ) {
 			?>
 			<p>
 				<input type="checkbox" class="checkbox" id="<?php echo $this->get_field_id( 'count' ); ?>" name="<?php echo $this->get_field_name( 'count' ); ?>" <?php checked( $count, true ); ?> />
 				<label for="<?php echo $this->get_field_id( 'count' ); ?>"><?php _e( 'Show tag counts' ); ?></label>
 			</p>
 			<?php
 		}
 	}
 
 	/**
 	 * Retrieves the taxonomy for the current Tag cloud widget instance.
 	 *
 	 * @since 4.4.0
 	 *
 	 * @param array $instance Current settings.
 	 * @return string Name of the current taxonomy if set, otherwise 'post_tag'.
 	 */
 	public function _get_current_taxonomy( $instance ) {
 		if ( ! empty( $instance['taxonomy'] ) && taxonomy_exists( $instance['taxonomy'] ) ) {
 			return $instance['taxonomy'];
 		}
 
 		return 'post_tag';
 	}
 }