207 lines
6.5 KiB
PHP
207 lines
6.5 KiB
PHP
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<?php
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/**
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* Widget API: WP_Nav_Menu_Widget 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 the Navigation Menu widget.
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*
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* @since 3.0.0
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*
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* @see WP_Widget
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*/
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class WP_Nav_Menu_Widget extends WP_Widget {
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/**
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* Sets up a new Navigation Menu widget instance.
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*
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* @since 3.0.0
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*/
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public function __construct() {
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$widget_ops = array(
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'description' => __( 'Add a navigation menu to your sidebar.' ),
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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( 'nav_menu', __( 'Navigation Menu' ), $widget_ops );
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}
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/**
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* Outputs the content for the current Navigation Menu widget instance.
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*
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* @since 3.0.0
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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 Navigation Menu widget instance.
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*/
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public function widget( $args, $instance ) {
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// Get menu.
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$nav_menu = ! empty( $instance['nav_menu'] ) ? wp_get_nav_menu_object( $instance['nav_menu'] ) : false;
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if ( ! $nav_menu ) {
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return;
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}
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$default_title = __( 'Menu' );
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$title = ! empty( $instance['title'] ) ? $instance['title'] : '';
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/** This filter is documented in wp-includes/widgets/class-wp-widget-pages.php */
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$title = apply_filters( 'widget_title', $title, $instance, $this->id_base );
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echo $args['before_widget'];
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if ( $title ) {
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echo $args['before_title'] . $title . $args['after_title'];
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}
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$format = current_theme_supports( 'html5', 'navigation-widgets' ) ? 'html5' : 'xhtml';
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/**
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* Filters the HTML format of widgets with navigation links.
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*
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* @since 5.5.0
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*
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* @param string $format The type of markup to use in widgets with navigation links.
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* Accepts 'html5', 'xhtml'.
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*/
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$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 : $default_title;
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$nav_menu_args = array(
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'fallback_cb' => '',
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'menu' => $nav_menu,
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'container' => 'nav',
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'container_aria_label' => $aria_label,
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'items_wrap' => '<ul id="%1$s" class="%2$s">%3$s</ul>',
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);
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} else {
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$nav_menu_args = array(
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'fallback_cb' => '',
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'menu' => $nav_menu,
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);
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}
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/**
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* Filters the arguments for the Navigation Menu widget.
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*
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* @since 4.2.0
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* @since 4.4.0 Added the `$instance` parameter.
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*
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* @param array $nav_menu_args {
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* An array of arguments passed to wp_nav_menu() to retrieve a navigation menu.
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*
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* @type callable|bool $fallback_cb Callback to fire if the menu doesn't exist. Default empty.
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* @type mixed $menu Menu ID, slug, or name.
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* }
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* @param WP_Term $nav_menu Nav menu object for the current menu.
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* @param array $args Display arguments for the current widget.
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* @param array $instance Array of settings for the current widget.
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*/
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wp_nav_menu( apply_filters( 'widget_nav_menu_args', $nav_menu_args, $nav_menu, $args, $instance ) );
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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 Navigation Menu widget instance.
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*
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* @since 3.0.0
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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 = array();
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if ( ! empty( $new_instance['title'] ) ) {
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$instance['title'] = sanitize_text_field( $new_instance['title'] );
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}
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if ( ! empty( $new_instance['nav_menu'] ) ) {
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$instance['nav_menu'] = (int) $new_instance['nav_menu'];
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}
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return $instance;
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}
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/**
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* Outputs the settings form for the Navigation Menu widget.
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*
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* @since 3.0.0
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*
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* @param array $instance Current settings.
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* @global WP_Customize_Manager $wp_customize
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*/
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public function form( $instance ) {
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global $wp_customize;
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$title = isset( $instance['title'] ) ? $instance['title'] : '';
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$nav_menu = isset( $instance['nav_menu'] ) ? $instance['nav_menu'] : '';
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// Get menus.
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$menus = wp_get_nav_menus();
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$empty_menus_style = '';
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$not_empty_menus_style = '';
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if ( empty( $menus ) ) {
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$empty_menus_style = ' style="display:none" ';
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} else {
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$not_empty_menus_style = ' style="display:none" ';
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}
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$nav_menu_style = '';
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if ( ! $nav_menu ) {
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$nav_menu_style = 'display: none;';
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}
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// If no menus exists, direct the user to go and create some.
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?>
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<p class="nav-menu-widget-no-menus-message" <?php echo $not_empty_menus_style; ?>>
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<?php
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if ( $wp_customize instanceof WP_Customize_Manager ) {
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$url = 'javascript: wp.customize.panel( "nav_menus" ).focus();';
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} else {
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$url = admin_url( 'nav-menus.php' );
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}
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printf(
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/* translators: %s: URL to create a new menu. */
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__( 'No menus have been created yet. <a href="%s">Create some</a>.' ),
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// The URL can be a `javascript:` link, so esc_attr() is used here instead of esc_url().
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esc_attr( $url )
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);
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?>
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</p>
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<div class="nav-menu-widget-form-controls" <?php echo $empty_menus_style; ?>>
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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 type="text" class="widefat" id="<?php echo $this->get_field_id( 'title' ); ?>" name="<?php echo $this->get_field_name( 'title' ); ?>" value="<?php echo esc_attr( $title ); ?>" />
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</p>
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<p>
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<label for="<?php echo $this->get_field_id( 'nav_menu' ); ?>"><?php _e( 'Select Menu:' ); ?></label>
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<select id="<?php echo $this->get_field_id( 'nav_menu' ); ?>" name="<?php echo $this->get_field_name( 'nav_menu' ); ?>">
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<option value="0"><?php _e( '— Select —' ); ?></option>
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<?php foreach ( $menus as $menu ) : ?>
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<option value="<?php echo esc_attr( $menu->term_id ); ?>" <?php selected( $nav_menu, $menu->term_id ); ?>>
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<?php echo esc_html( $menu->name ); ?>
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</option>
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<?php endforeach; ?>
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</select>
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</p>
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<?php if ( $wp_customize instanceof WP_Customize_Manager ) : ?>
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<p class="edit-selected-nav-menu" style="<?php echo $nav_menu_style; ?>">
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<button type="button" class="button"><?php _e( 'Edit Menu' ); ?></button>
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</p>
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<?php endif; ?>
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</div>
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<?php
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}
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}
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