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Role="navigation" was required for assistive technology to recognize HTML5 element's native ARIA roles while HTML5 and ARIA were being introduced. With the deprecation of IE11, the role attribute is only required when mapping elements that don't have native role. Props costdev, mukesh27. Fixes #54054. Built from https://develop.svn.wordpress.org/trunk@51967 git-svn-id: http://core.svn.wordpress.org/trunk@51556 1a063a9b-81f0-0310-95a4-ce76da25c4cd
208 lines
6.9 KiB
PHP
208 lines
6.9 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, $instance ) );
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echo '</form>';
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$type_attr = current_theme_supports( 'html5', 'script' ) ? '' : ' type="text/javascript"';
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?>
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<script<?php echo $type_attr; ?>>
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/* <![CDATA[ */
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(function() {
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var dropdown = document.getElementById( "<?php echo esc_js( $dropdown_id ); ?>" );
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function onCatChange() {
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if ( dropdown.options[ dropdown.selectedIndex ].value > 0 ) {
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dropdown.parentNode.submit();
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}
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}
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dropdown.onchange = onCatChange;
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})();
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/* ]]> */
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</script>
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<?php
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} else {
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$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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