From a415c29efee45520ae252d2aa28f1083a521cd7b Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 09:56:49 +0200
Subject: Adding upstream version 6.4.3+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 wp-includes/class-walker-nav-menu.php | 339 ++++++++++++++++++++++++++++++++++
 1 file changed, 339 insertions(+)
 create mode 100644 wp-includes/class-walker-nav-menu.php

(limited to 'wp-includes/class-walker-nav-menu.php')

diff --git a/wp-includes/class-walker-nav-menu.php b/wp-includes/class-walker-nav-menu.php
new file mode 100644
index 0000000..4683970
--- /dev/null
+++ b/wp-includes/class-walker-nav-menu.php
@@ -0,0 +1,339 @@
+<?php
+/**
+ * Nav Menu API: Walker_Nav_Menu class
+ *
+ * @package WordPress
+ * @subpackage Nav_Menus
+ * @since 4.6.0
+ */
+
+/**
+ * Core class used to implement an HTML list of nav menu items.
+ *
+ * @since 3.0.0
+ *
+ * @see Walker
+ */
+class Walker_Nav_Menu extends Walker {
+	/**
+	 * What the class handles.
+	 *
+	 * @since 3.0.0
+	 * @var string
+	 *
+	 * @see Walker::$tree_type
+	 */
+	public $tree_type = array( 'post_type', 'taxonomy', 'custom' );
+
+	/**
+	 * Database fields to use.
+	 *
+	 * @since 3.0.0
+	 * @todo Decouple this.
+	 * @var string[]
+	 *
+	 * @see Walker::$db_fields
+	 */
+	public $db_fields = array(
+		'parent' => 'menu_item_parent',
+		'id'     => 'db_id',
+	);
+
+	/**
+	 * Starts the list before the elements are added.
+	 *
+	 * @since 3.0.0
+	 *
+	 * @see Walker::start_lvl()
+	 *
+	 * @param string   $output Used to append additional content (passed by reference).
+	 * @param int      $depth  Depth of menu item. Used for padding.
+	 * @param stdClass $args   An object of wp_nav_menu() arguments.
+	 */
+	public function start_lvl( &$output, $depth = 0, $args = null ) {
+		if ( isset( $args->item_spacing ) && 'discard' === $args->item_spacing ) {
+			$t = '';
+			$n = '';
+		} else {
+			$t = "\t";
+			$n = "\n";
+		}
+		$indent = str_repeat( $t, $depth );
+
+		// Default class.
+		$classes = array( 'sub-menu' );
+
+		/**
+		 * Filters the CSS class(es) applied to a menu list element.
+		 *
+		 * @since 4.8.0
+		 *
+		 * @param string[] $classes Array of the CSS classes that are applied to the menu `<ul>` element.
+		 * @param stdClass $args    An object of `wp_nav_menu()` arguments.
+		 * @param int      $depth   Depth of menu item. Used for padding.
+		 */
+		$class_names = implode( ' ', apply_filters( 'nav_menu_submenu_css_class', $classes, $args, $depth ) );
+
+		$atts          = array();
+		$atts['class'] = ! empty( $class_names ) ? $class_names : '';
+
+		/**
+		 * Filters the HTML attributes applied to a menu list element.
+		 *
+		 * @since 6.3.0
+		 *
+		 * @param array $atts {
+		 *     The HTML attributes applied to the `<ul>` element, empty strings are ignored.
+		 *
+		 *     @type string $class    HTML CSS class attribute.
+		 * }
+		 * @param stdClass $args      An object of `wp_nav_menu()` arguments.
+		 * @param int      $depth     Depth of menu item. Used for padding.
+		 */
+		$atts       = apply_filters( 'nav_menu_submenu_attributes', $atts, $args, $depth );
+		$attributes = $this->build_atts( $atts );
+
+		$output .= "{$n}{$indent}<ul{$attributes}>{$n}";
+	}
+
+	/**
+	 * Ends the list of after the elements are added.
+	 *
+	 * @since 3.0.0
+	 *
+	 * @see Walker::end_lvl()
+	 *
+	 * @param string   $output Used to append additional content (passed by reference).
+	 * @param int      $depth  Depth of menu item. Used for padding.
+	 * @param stdClass $args   An object of wp_nav_menu() arguments.
+	 */
+	public function end_lvl( &$output, $depth = 0, $args = null ) {
+		if ( isset( $args->item_spacing ) && 'discard' === $args->item_spacing ) {
+			$t = '';
+			$n = '';
+		} else {
+			$t = "\t";
+			$n = "\n";
+		}
+		$indent  = str_repeat( $t, $depth );
+		$output .= "$indent</ul>{$n}";
+	}
+
+	/**
+	 * Starts the element output.
+	 *
+	 * @since 3.0.0
+	 * @since 4.4.0 The {@see 'nav_menu_item_args'} filter was added.
+	 * @since 5.9.0 Renamed `$item` to `$data_object` and `$id` to `$current_object_id`
+	 *              to match parent class for PHP 8 named parameter support.
+	 *
+	 * @see Walker::start_el()
+	 *
+	 * @param string   $output            Used to append additional content (passed by reference).
+	 * @param WP_Post  $data_object       Menu item data object.
+	 * @param int      $depth             Depth of menu item. Used for padding.
+	 * @param stdClass $args              An object of wp_nav_menu() arguments.
+	 * @param int      $current_object_id Optional. ID of the current menu item. Default 0.
+	 */
+	public function start_el( &$output, $data_object, $depth = 0, $args = null, $current_object_id = 0 ) {
+		// Restores the more descriptive, specific name for use within this method.
+		$menu_item = $data_object;
+
+		if ( isset( $args->item_spacing ) && 'discard' === $args->item_spacing ) {
+			$t = '';
+			$n = '';
+		} else {
+			$t = "\t";
+			$n = "\n";
+		}
+		$indent = ( $depth ) ? str_repeat( $t, $depth ) : '';
+
+		$classes   = empty( $menu_item->classes ) ? array() : (array) $menu_item->classes;
+		$classes[] = 'menu-item-' . $menu_item->ID;
+
+		/**
+		 * Filters the arguments for a single nav menu item.
+		 *
+		 * @since 4.4.0
+		 *
+		 * @param stdClass $args      An object of wp_nav_menu() arguments.
+		 * @param WP_Post  $menu_item Menu item data object.
+		 * @param int      $depth     Depth of menu item. Used for padding.
+		 */
+		$args = apply_filters( 'nav_menu_item_args', $args, $menu_item, $depth );
+
+		/**
+		 * Filters the CSS classes applied to a menu item's list item element.
+		 *
+		 * @since 3.0.0
+		 * @since 4.1.0 The `$depth` parameter was added.
+		 *
+		 * @param string[] $classes   Array of the CSS classes that are applied to the menu item's `<li>` element.
+		 * @param WP_Post  $menu_item The current menu item object.
+		 * @param stdClass $args      An object of wp_nav_menu() arguments.
+		 * @param int      $depth     Depth of menu item. Used for padding.
+		 */
+		$class_names = implode( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $menu_item, $args, $depth ) );
+
+		/**
+		 * Filters the ID attribute applied to a menu item's list item element.
+		 *
+		 * @since 3.0.1
+		 * @since 4.1.0 The `$depth` parameter was added.
+		 *
+		 * @param string   $menu_item_id The ID attribute applied to the menu item's `<li>` element.
+		 * @param WP_Post  $menu_item    The current menu item.
+		 * @param stdClass $args         An object of wp_nav_menu() arguments.
+		 * @param int      $depth        Depth of menu item. Used for padding.
+		 */
+		$id = apply_filters( 'nav_menu_item_id', 'menu-item-' . $menu_item->ID, $menu_item, $args, $depth );
+
+		$li_atts          = array();
+		$li_atts['id']    = ! empty( $id ) ? $id : '';
+		$li_atts['class'] = ! empty( $class_names ) ? $class_names : '';
+
+		/**
+		 * Filters the HTML attributes applied to a menu's list item element.
+		 *
+		 * @since 6.3.0
+		 *
+		 * @param array $li_atts {
+		 *     The HTML attributes applied to the menu item's `<li>` element, empty strings are ignored.
+		 *
+		 *     @type string $class        HTML CSS class attribute.
+		 *     @type string $id           HTML id attribute.
+		 * }
+		 * @param WP_Post  $menu_item The current menu item object.
+		 * @param stdClass $args      An object of wp_nav_menu() arguments.
+		 * @param int      $depth     Depth of menu item. Used for padding.
+		 */
+		$li_atts       = apply_filters( 'nav_menu_item_attributes', $li_atts, $menu_item, $args, $depth );
+		$li_attributes = $this->build_atts( $li_atts );
+
+		$output .= $indent . '<li' . $li_attributes . '>';
+
+		$atts           = array();
+		$atts['title']  = ! empty( $menu_item->attr_title ) ? $menu_item->attr_title : '';
+		$atts['target'] = ! empty( $menu_item->target ) ? $menu_item->target : '';
+		if ( '_blank' === $menu_item->target && empty( $menu_item->xfn ) ) {
+			$atts['rel'] = 'noopener';
+		} else {
+			$atts['rel'] = $menu_item->xfn;
+		}
+
+		if ( ! empty( $menu_item->url ) ) {
+			if ( get_privacy_policy_url() === $menu_item->url ) {
+				$atts['rel'] = empty( $atts['rel'] ) ? 'privacy-policy' : $atts['rel'] . ' privacy-policy';
+			}
+
+			$atts['href'] = $menu_item->url;
+		} else {
+			$atts['href'] = '';
+		}
+
+		$atts['aria-current'] = $menu_item->current ? 'page' : '';
+
+		/**
+		 * Filters the HTML attributes applied to a menu item's anchor element.
+		 *
+		 * @since 3.6.0
+		 * @since 4.1.0 The `$depth` parameter was added.
+		 *
+		 * @param array $atts {
+		 *     The HTML attributes applied to the menu item's `<a>` element, empty strings are ignored.
+		 *
+		 *     @type string $title        Title attribute.
+		 *     @type string $target       Target attribute.
+		 *     @type string $rel          The rel attribute.
+		 *     @type string $href         The href attribute.
+		 *     @type string $aria-current The aria-current attribute.
+		 * }
+		 * @param WP_Post  $menu_item The current menu item object.
+		 * @param stdClass $args      An object of wp_nav_menu() arguments.
+		 * @param int      $depth     Depth of menu item. Used for padding.
+		 */
+		$atts       = apply_filters( 'nav_menu_link_attributes', $atts, $menu_item, $args, $depth );
+		$attributes = $this->build_atts( $atts );
+
+		/** This filter is documented in wp-includes/post-template.php */
+		$title = apply_filters( 'the_title', $menu_item->title, $menu_item->ID );
+
+		/**
+		 * Filters a menu item's title.
+		 *
+		 * @since 4.4.0
+		 *
+		 * @param string   $title     The menu item's title.
+		 * @param WP_Post  $menu_item The current menu item object.
+		 * @param stdClass $args      An object of wp_nav_menu() arguments.
+		 * @param int      $depth     Depth of menu item. Used for padding.
+		 */
+		$title = apply_filters( 'nav_menu_item_title', $title, $menu_item, $args, $depth );
+
+		$item_output  = $args->before;
+		$item_output .= '<a' . $attributes . '>';
+		$item_output .= $args->link_before . $title . $args->link_after;
+		$item_output .= '</a>';
+		$item_output .= $args->after;
+
+		/**
+		 * Filters a menu item's starting output.
+		 *
+		 * The menu item's starting output only includes `$args->before`, the opening `<a>`,
+		 * the menu item's title, the closing `</a>`, and `$args->after`. Currently, there is
+		 * no filter for modifying the opening and closing `<li>` for a menu item.
+		 *
+		 * @since 3.0.0
+		 *
+		 * @param string   $item_output The menu item's starting HTML output.
+		 * @param WP_Post  $menu_item   Menu item data object.
+		 * @param int      $depth       Depth of menu item. Used for padding.
+		 * @param stdClass $args        An object of wp_nav_menu() arguments.
+		 */
+		$output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $menu_item, $depth, $args );
+	}
+
+	/**
+	 * Ends the element output, if needed.
+	 *
+	 * @since 3.0.0
+	 * @since 5.9.0 Renamed `$item` to `$data_object` to match parent class for PHP 8 named parameter support.
+	 *
+	 * @see Walker::end_el()
+	 *
+	 * @param string   $output      Used to append additional content (passed by reference).
+	 * @param WP_Post  $data_object Menu item data object. Not used.
+	 * @param int      $depth       Depth of page. Not Used.
+	 * @param stdClass $args        An object of wp_nav_menu() arguments.
+	 */
+	public function end_el( &$output, $data_object, $depth = 0, $args = null ) {
+		if ( isset( $args->item_spacing ) && 'discard' === $args->item_spacing ) {
+			$t = '';
+			$n = '';
+		} else {
+			$t = "\t";
+			$n = "\n";
+		}
+		$output .= "</li>{$n}";
+	}
+
+	/**
+	 * Builds a string of HTML attributes from an array of key/value pairs.
+	 * Empty values are ignored.
+	 *
+	 * @since 6.3.0
+	 *
+	 * @param  array $atts Optional. An array of HTML attribute key/value pairs. Default empty array.
+	 * @return string A string of HTML attributes.
+	 */
+	protected function build_atts( $atts = array() ) {
+		$attribute_string = '';
+		foreach ( $atts as $attr => $value ) {
+			if ( false !== $value && '' !== $value && is_scalar( $value ) ) {
+				$value             = ( 'href' === $attr ) ? esc_url( $value ) : esc_attr( $value );
+				$attribute_string .= ' ' . $attr . '="' . $value . '"';
+			}
+		}
+		return $attribute_string;
+	}
+}
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