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- <?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
- * @access public
- */
- public function __construct() {
- $widget_ops = array(
- 'description' => __( 'A cloud of your most used tags.' ),
- 'customize_selective_refresh' => true,
- );
- parent::__construct( 'tag_cloud', __( 'Tag Cloud' ), $widget_ops );
- }
-
- /**
- * Outputs the content for the current Tag Cloud widget instance.
- *
- * @since 2.8.0
- * @access public
- *
- * @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;
- }
- }
-
- /**
- * Filters the taxonomy used in the Tag Cloud widget.
- *
- * @since 2.8.0
- * @since 3.0.0 Added taxonomy drop-down.
- *
- * @see wp_tag_cloud()
- *
- * @param array $args Args used for the tag cloud widget.
- */
- $tag_cloud = wp_tag_cloud( apply_filters( 'widget_tag_cloud_args', array(
- 'taxonomy' => $current_taxonomy,
- 'echo' => false
- ) ) );
-
- 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'];
- }
-
- echo '<div class="tagcloud">';
-
- echo $tag_cloud;
-
- echo "</div>\n";
- echo $args['after_widget'];
- }
-
- /**
- * Handles updating settings for the current Tag Cloud widget instance.
- *
- * @since 2.8.0
- * @access public
- *
- * @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'] );
- $instance['taxonomy'] = stripslashes($new_instance['taxonomy']);
- return $instance;
- }
-
- /**
- * Outputs the Tag Cloud widget settings form.
- *
- * @since 2.8.0
- * @access public
- *
- * @param array $instance Current settings.
- */
- public function form( $instance ) {
- $current_taxonomy = $this->_get_current_taxonomy($instance);
- $title_id = $this->get_field_id( 'title' );
- $instance['title'] = ! empty( $instance['title'] ) ? esc_attr( $instance['title'] ) : '';
-
- echo '<p><label for="' . $title_id .'">' . __( 'Title:' ) . '</label>
- <input type="text" class="widefat" id="' . $title_id .'" name="' . $this->get_field_name( 'title' ) .'" value="' . $instance['title'] .'" />
- </p>';
-
- $taxonomies = get_taxonomies( array( 'show_tagcloud' => true ), 'object' );
- $id = $this->get_field_id( 'taxonomy' );
- $name = $this->get_field_name( 'taxonomy' );
- $input = '<input type="hidden" id="' . $id . '" name="' . $name . '" value="%s" />';
-
- switch ( count( $taxonomies ) ) {
-
- // No tag cloud supporting taxonomies found, display error message
- case 0:
- echo '<p>' . __( 'The tag cloud will not be displayed since there are no taxonomies that support the tag cloud widget.' ) . '</p>';
- printf( $input, '' );
- break;
-
- // Just a single tag cloud supporting taxonomy found, no need to display options
- case 1:
- $keys = array_keys( $taxonomies );
- $taxonomy = reset( $keys );
- printf( $input, esc_attr( $taxonomy ) );
- break;
-
- // More than one tag cloud supporting taxonomy found, display options
- default:
- printf(
- '<p><label for="%1$s">%2$s</label>' .
- '<select class="widefat" id="%1$s" name="%3$s">',
- $id,
- __( 'Taxonomy:' ),
- $name
- );
-
- foreach ( $taxonomies as $taxonomy => $tax ) {
- printf(
- '<option value="%s"%s>%s</option>',
- esc_attr( $taxonomy ),
- selected( $taxonomy, $current_taxonomy, false ),
- $tax->labels->name
- );
- }
-
- echo '</select></p>';
- }
- }
-
- /**
- * Retrieves the taxonomy for the current Tag cloud widget instance.
- *
- * @since 4.4.0
- * @access public
- *
- * @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';
- }
- }
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