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196 lines
5.5 KiB
196 lines
5.5 KiB
<?php |
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/** |
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* Widget API: WP_Widget_Tag_Cloud class |
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* |
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* @package WordPress |
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* @subpackage Widgets |
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* @since 4.4.0 |
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*/ |
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/** |
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* Core class used to implement a Tag cloud widget. |
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* |
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* @since 2.8.0 |
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* |
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* @see WP_Widget |
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*/ |
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class WP_Widget_Tag_Cloud extends WP_Widget { |
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/** |
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* Sets up a new Tag Cloud widget instance. |
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* |
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* @since 2.8.0 |
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*/ |
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public function __construct() { |
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$widget_ops = array( |
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'description' => __( 'A cloud of your most used tags.' ), |
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'customize_selective_refresh' => true, |
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); |
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parent::__construct( 'tag_cloud', __( 'Tag Cloud' ), $widget_ops ); |
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} |
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/** |
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* Outputs the content for the current Tag Cloud widget instance. |
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* |
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* @since 2.8.0 |
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* |
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* @param array $args Display arguments including 'before_title', 'after_title', |
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* 'before_widget', and 'after_widget'. |
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* @param array $instance Settings for the current Tag Cloud widget instance. |
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*/ |
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public function widget( $args, $instance ) { |
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$current_taxonomy = $this->_get_current_taxonomy( $instance ); |
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if ( ! empty( $instance['title'] ) ) { |
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$title = $instance['title']; |
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} else { |
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if ( 'post_tag' === $current_taxonomy ) { |
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$title = __( 'Tags' ); |
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} else { |
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$tax = get_taxonomy( $current_taxonomy ); |
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$title = $tax->labels->name; |
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} |
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} |
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$show_count = ! empty( $instance['count'] ); |
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/** |
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* Filters the taxonomy used in the Tag Cloud widget. |
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* |
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* @since 2.8.0 |
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* @since 3.0.0 Added taxonomy drop-down. |
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* @since 4.9.0 Added the `$instance` parameter. |
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* |
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* @see wp_tag_cloud() |
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* |
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* @param array $args Args used for the tag cloud widget. |
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* @param array $instance Array of settings for the current widget. |
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*/ |
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$tag_cloud = wp_tag_cloud( apply_filters( 'widget_tag_cloud_args', array( |
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'taxonomy' => $current_taxonomy, |
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'echo' => false, |
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'show_count' => $show_count, |
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), $instance ) ); |
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if ( empty( $tag_cloud ) ) { |
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return; |
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} |
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/** This filter is documented in wp-includes/widgets/class-wp-widget-pages.php */ |
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$title = apply_filters( 'widget_title', $title, $instance, $this->id_base ); |
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echo $args['before_widget']; |
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if ( $title ) { |
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echo $args['before_title'] . $title . $args['after_title']; |
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} |
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echo '<div class="tagcloud">'; |
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echo $tag_cloud; |
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echo "</div>\n"; |
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echo $args['after_widget']; |
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} |
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/** |
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* Handles updating settings for the current Tag Cloud widget instance. |
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* |
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* @since 2.8.0 |
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* |
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* @param array $new_instance New settings for this instance as input by the user via |
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* WP_Widget::form(). |
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* @param array $old_instance Old settings for this instance. |
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* @return array Settings to save or bool false to cancel saving. |
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*/ |
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public function update( $new_instance, $old_instance ) { |
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$instance = array(); |
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$instance['title'] = sanitize_text_field( $new_instance['title'] ); |
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$instance['count'] = ! empty( $new_instance['count'] ) ? 1 : 0; |
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$instance['taxonomy'] = stripslashes($new_instance['taxonomy']); |
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return $instance; |
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} |
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/** |
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* Outputs the Tag Cloud widget settings form. |
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* |
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* @since 2.8.0 |
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* |
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* @param array $instance Current settings. |
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*/ |
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public function form( $instance ) { |
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$current_taxonomy = $this->_get_current_taxonomy($instance); |
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$title_id = $this->get_field_id( 'title' ); |
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$count = isset( $instance['count'] ) ? (bool) $instance['count'] : false; |
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$instance['title'] = ! empty( $instance['title'] ) ? esc_attr( $instance['title'] ) : ''; |
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echo '<p><label for="' . $title_id .'">' . __( 'Title:' ) . '</label> |
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<input type="text" class="widefat" id="' . $title_id .'" name="' . $this->get_field_name( 'title' ) .'" value="' . $instance['title'] .'" /> |
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</p>'; |
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$taxonomies = get_taxonomies( array( 'show_tagcloud' => true ), 'object' ); |
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$id = $this->get_field_id( 'taxonomy' ); |
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$name = $this->get_field_name( 'taxonomy' ); |
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$input = '<input type="hidden" id="' . $id . '" name="' . $name . '" value="%s" />'; |
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$count_checkbox = sprintf( |
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'<p><input type="checkbox" class="checkbox" id="%1$s" name="%2$s"%3$s /> <label for="%1$s">%4$s</label></p>', |
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$this->get_field_id( 'count' ), |
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$this->get_field_name( 'count' ), |
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checked( $count, true, false ), |
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__( 'Show tag counts' ) |
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); |
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switch ( count( $taxonomies ) ) { |
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// No tag cloud supporting taxonomies found, display error message |
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case 0: |
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echo '<p>' . __( 'The tag cloud will not be displayed since there are no taxonomies that support the tag cloud widget.' ) . '</p>'; |
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printf( $input, '' ); |
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break; |
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// Just a single tag cloud supporting taxonomy found, no need to display a select. |
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case 1: |
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$keys = array_keys( $taxonomies ); |
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$taxonomy = reset( $keys ); |
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printf( $input, esc_attr( $taxonomy ) ); |
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echo $count_checkbox; |
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break; |
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// More than one tag cloud supporting taxonomy found, display a select. |
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default: |
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printf( |
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'<p><label for="%1$s">%2$s</label>' . |
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'<select class="widefat" id="%1$s" name="%3$s">', |
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$id, |
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__( 'Taxonomy:' ), |
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$name |
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); |
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foreach ( $taxonomies as $taxonomy => $tax ) { |
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printf( |
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'<option value="%s"%s>%s</option>', |
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esc_attr( $taxonomy ), |
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selected( $taxonomy, $current_taxonomy, false ), |
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$tax->labels->name |
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); |
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} |
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echo '</select></p>' . $count_checkbox; |
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} |
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} |
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/** |
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* Retrieves the taxonomy for the current Tag cloud widget instance. |
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* |
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* @since 4.4.0 |
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* |
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* @param array $instance Current settings. |
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* @return string Name of the current taxonomy if set, otherwise 'post_tag'. |
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*/ |
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public function _get_current_taxonomy($instance) { |
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if ( !empty($instance['taxonomy']) && taxonomy_exists($instance['taxonomy']) ) |
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return $instance['taxonomy']; |
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return 'post_tag'; |
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} |
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}
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