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