diff options
Diffstat (limited to 'wp-includes/widgets/class-wp-widget-categories.php')
| -rw-r--r-- | wp-includes/widgets/class-wp-widget-categories.php | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/wp-includes/widgets/class-wp-widget-categories.php b/wp-includes/widgets/class-wp-widget-categories.php new file mode 100644 index 0000000..b79881e --- /dev/null +++ b/wp-includes/widgets/class-wp-widget-categories.php @@ -0,0 +1,205 @@ +<?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>'; + + ob_start(); + ?> + +<script> +(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 + wp_print_inline_script_tag( wp_remove_surrounding_empty_script_tags( ob_get_clean() ) ); + } 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 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 + } +} |