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7abc752329
The parent class uses `$current_object_id` while most of the child classes use `$id`. As the parent class' is more descriptive, renaming the last parameter in each of child class. Why? PHP 8 introduces the ability to pass named arguments to function/method calls. This means the child and parent method signatures (i.e. parameter names) need to match. Changes for readability: - `@since` clearly specifies the original parameter name and its new name as well as why the change happened. - In methods longer than a single line, the generic parameter is reassigned to the original parameter restoring it for context for use within the method. An inline comment is added to explain why this reassignment is made. - In cases where the original parameter name was too generic or misleading, renamed (when reassigning) to a more descriptive name for use within the method. Follow-up to [7737], [8900], [8970], [14248], [15077], [16100], [25642], [25644], [37051], [37054], [37056], [46271], [47189], [51739]. Props jrf, hellofromTonya, sergeybiryukov, azaozz, desrosj, johnbillion. See #51553. Built from https://develop.svn.wordpress.org/trunk@51779 git-svn-id: http://core.svn.wordpress.org/trunk@51386 1a063a9b-81f0-0310-95a4-ce76da25c4cd
279 lines
9.0 KiB
PHP
279 lines
9.0 KiB
PHP
<?php
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/**
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* Nav Menu API: Walker_Nav_Menu class
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*
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* @package WordPress
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* @subpackage Nav_Menus
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* @since 4.6.0
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*/
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/**
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* Core class used to implement an HTML list of nav menu items.
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*
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* @since 3.0.0
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*
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* @see Walker
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*/
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class Walker_Nav_Menu extends Walker {
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/**
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* What the class handles.
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*
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* @since 3.0.0
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* @var string
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*
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* @see Walker::$tree_type
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*/
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public $tree_type = array( 'post_type', 'taxonomy', 'custom' );
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/**
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* Database fields to use.
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*
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* @since 3.0.0
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* @todo Decouple this.
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* @var array
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*
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* @see Walker::$db_fields
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*/
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public $db_fields = array(
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'parent' => 'menu_item_parent',
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'id' => 'db_id',
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);
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/**
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* Starts the list before the elements are added.
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*
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* @since 3.0.0
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*
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* @see Walker::start_lvl()
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*
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* @param string $output Used to append additional content (passed by reference).
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* @param int $depth Depth of menu item. Used for padding.
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* @param stdClass $args An object of wp_nav_menu() arguments.
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*/
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public function start_lvl( &$output, $depth = 0, $args = null ) {
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if ( isset( $args->item_spacing ) && 'discard' === $args->item_spacing ) {
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$t = '';
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$n = '';
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} else {
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$t = "\t";
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$n = "\n";
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}
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$indent = str_repeat( $t, $depth );
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// Default class.
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$classes = array( 'sub-menu' );
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/**
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* Filters the CSS class(es) applied to a menu list element.
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*
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* @since 4.8.0
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*
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* @param string[] $classes Array of the CSS classes that are applied to the menu `<ul>` element.
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* @param stdClass $args An object of `wp_nav_menu()` arguments.
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* @param int $depth Depth of menu item. Used for padding.
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*/
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$class_names = implode( ' ', apply_filters( 'nav_menu_submenu_css_class', $classes, $args, $depth ) );
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$class_names = $class_names ? ' class="' . esc_attr( $class_names ) . '"' : '';
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$output .= "{$n}{$indent}<ul$class_names>{$n}";
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}
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/**
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* Ends the list of after the elements are added.
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*
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* @since 3.0.0
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*
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* @see Walker::end_lvl()
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*
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* @param string $output Used to append additional content (passed by reference).
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* @param int $depth Depth of menu item. Used for padding.
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* @param stdClass $args An object of wp_nav_menu() arguments.
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*/
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public function end_lvl( &$output, $depth = 0, $args = null ) {
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if ( isset( $args->item_spacing ) && 'discard' === $args->item_spacing ) {
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$t = '';
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$n = '';
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} else {
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$t = "\t";
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$n = "\n";
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}
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$indent = str_repeat( $t, $depth );
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$output .= "$indent</ul>{$n}";
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}
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/**
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* Starts the element output.
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*
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* @since 3.0.0
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* @since 4.4.0 The {@see 'nav_menu_item_args'} filter was added.
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* @since 5.9.0 Renamed `$item` to `$data_object` and `$id` to `$current_object_id`
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* to match parent class for PHP 8 named parameter support.
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*
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* @see Walker::start_el()
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*
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* @param string $output Used to append additional content (passed by reference).
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* @param WP_Post $data_object Menu item data object.
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* @param int $depth Depth of menu item. Used for padding.
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* @param stdClass $args An object of wp_nav_menu() arguments.
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* @param int $current_object_id Optional. ID of the current menu item. Default 0.
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*/
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public function start_el( &$output, $data_object, $depth = 0, $args = null, $current_object_id = 0 ) {
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// Restores the more descriptive, specific name for use within this method.
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$menu_item = $data_object;
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if ( isset( $args->item_spacing ) && 'discard' === $args->item_spacing ) {
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$t = '';
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$n = '';
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} else {
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$t = "\t";
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$n = "\n";
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}
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$indent = ( $depth ) ? str_repeat( $t, $depth ) : '';
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$classes = empty( $menu_item->classes ) ? array() : (array) $menu_item->classes;
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$classes[] = 'menu-item-' . $menu_item->ID;
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/**
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* Filters the arguments for a single nav menu item.
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*
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* @since 4.4.0
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*
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* @param stdClass $args An object of wp_nav_menu() arguments.
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* @param WP_Post $menu_item Menu item data object.
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* @param int $depth Depth of menu item. Used for padding.
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*/
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$args = apply_filters( 'nav_menu_item_args', $args, $menu_item, $depth );
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/**
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* Filters the CSS classes applied to a menu item's list item element.
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*
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* @since 3.0.0
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* @since 4.1.0 The `$depth` parameter was added.
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*
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* @param string[] $classes Array of the CSS classes that are applied to the menu item's `<li>` element.
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* @param WP_Post $menu_item The current menu item object.
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* @param stdClass $args An object of wp_nav_menu() arguments.
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* @param int $depth Depth of menu item. Used for padding.
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*/
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$class_names = implode( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $menu_item, $args, $depth ) );
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$class_names = $class_names ? ' class="' . esc_attr( $class_names ) . '"' : '';
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/**
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* Filters the ID applied to a menu item's list item element.
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*
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* @since 3.0.1
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* @since 4.1.0 The `$depth` parameter was added.
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*
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* @param string $menu_id The ID that is applied to the menu item's `<li>` element.
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* @param WP_Post $menu_item The current menu item.
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* @param stdClass $args An object of wp_nav_menu() arguments.
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* @param int $depth Depth of menu item. Used for padding.
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*/
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$id = apply_filters( 'nav_menu_item_id', 'menu-item-' . $menu_item->ID, $menu_item, $args, $depth );
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$id = $id ? ' id="' . esc_attr( $id ) . '"' : '';
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$output .= $indent . '<li' . $id . $class_names . '>';
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$atts = array();
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$atts['title'] = ! empty( $menu_item->attr_title ) ? $menu_item->attr_title : '';
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$atts['target'] = ! empty( $menu_item->target ) ? $menu_item->target : '';
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if ( '_blank' === $menu_item->target && empty( $menu_item->xfn ) ) {
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$atts['rel'] = 'noopener';
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} else {
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$atts['rel'] = $menu_item->xfn;
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}
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$atts['href'] = ! empty( $menu_item->url ) ? $menu_item->url : '';
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$atts['aria-current'] = $menu_item->current ? 'page' : '';
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/**
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* Filters the HTML attributes applied to a menu item's anchor element.
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*
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* @since 3.6.0
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* @since 4.1.0 The `$depth` parameter was added.
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*
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* @param array $atts {
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* The HTML attributes applied to the menu item's `<a>` element, empty strings are ignored.
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*
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* @type string $title Title attribute.
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* @type string $target Target attribute.
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* @type string $rel The rel attribute.
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* @type string $href The href attribute.
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* @type string $aria-current The aria-current attribute.
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* }
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* @param WP_Post $menu_item The current menu item object.
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* @param stdClass $args An object of wp_nav_menu() arguments.
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* @param int $depth Depth of menu item. Used for padding.
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*/
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$atts = apply_filters( 'nav_menu_link_attributes', $atts, $menu_item, $args, $depth );
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$attributes = '';
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foreach ( $atts as $attr => $value ) {
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if ( is_scalar( $value ) && '' !== $value && false !== $value ) {
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$value = ( 'href' === $attr ) ? esc_url( $value ) : esc_attr( $value );
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$attributes .= ' ' . $attr . '="' . $value . '"';
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}
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}
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/** This filter is documented in wp-includes/post-template.php */
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$title = apply_filters( 'the_title', $menu_item->title, $menu_item->ID );
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/**
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* Filters a menu item's title.
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*
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* @since 4.4.0
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*
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* @param string $title The menu item's title.
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* @param WP_Post $menu_item The current menu item object.
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* @param stdClass $args An object of wp_nav_menu() arguments.
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* @param int $depth Depth of menu item. Used for padding.
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*/
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$title = apply_filters( 'nav_menu_item_title', $title, $menu_item, $args, $depth );
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$item_output = $args->before;
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$item_output .= '<a' . $attributes . '>';
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$item_output .= $args->link_before . $title . $args->link_after;
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$item_output .= '</a>';
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$item_output .= $args->after;
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/**
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* Filters a menu item's starting output.
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*
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* The menu item's starting output only includes `$args->before`, the opening `<a>`,
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* the menu item's title, the closing `</a>`, and `$args->after`. Currently, there is
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* no filter for modifying the opening and closing `<li>` for a menu item.
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*
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* @since 3.0.0
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*
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* @param string $item_output The menu item's starting HTML output.
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* @param WP_Post $menu_item Menu item data object.
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* @param int $depth Depth of menu item. Used for padding.
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* @param stdClass $args An object of wp_nav_menu() arguments.
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*/
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$output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $menu_item, $depth, $args );
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}
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/**
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* Ends the element output, if needed.
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*
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* @since 3.0.0
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*
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* @see Walker::end_el()
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*
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* @param string $output Used to append additional content (passed by reference).
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* @param WP_Post $item Page data object. Not used.
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* @param int $depth Depth of page. Not Used.
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* @param stdClass $args An object of wp_nav_menu() arguments.
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*/
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public function end_el( &$output, $item, $depth = 0, $args = null ) {
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if ( isset( $args->item_spacing ) && 'discard' === $args->item_spacing ) {
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$t = '';
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$n = '';
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} else {
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$t = "\t";
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$n = "\n";
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}
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$output .= "</li>{$n}";
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}
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}
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