280 lines
9.2 KiB
PHP
280 lines
9.2 KiB
PHP
|
<?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 ) );
|
||
|
|
$class_names = $class_names ? ' class="' . esc_attr( $class_names ) . '"' : '';
|
||
|
|
|
||
|
|
$output .= "{$n}{$indent}<ul$class_names>{$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 ) );
|
||
|
|
$class_names = $class_names ? ' class="' . esc_attr( $class_names ) . '"' : '';
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Filters the ID attribute applied to a menu item's list item element.
|
||
|
|
*
|
||
|
|
* @since 3.0.1
|
||
|
|
* @since 4.1.0 The `$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 );
|
||
|
|
$id = $id ? ' id="' . esc_attr( $id ) . '"' : '';
|
||
|
|
|
||
|
|
$output .= $indent . '<li' . $id . $class_names . '>';
|
||
|
|
|
||
|
|
$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;
|
||
|
|
}
|
||
|
|
$atts['href'] = ! empty( $menu_item->url ) ? $menu_item->url : '';
|
||
|
|
$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 = '';
|
||
|
|
foreach ( $atts as $attr => $value ) {
|
||
|
|
if ( is_scalar( $value ) && '' !== $value && false !== $value ) {
|
||
|
|
$value = ( 'href' === $attr ) ? esc_url( $value ) : esc_attr( $value );
|
||
|
|
$attributes .= ' ' . $attr . '="' . $value . '"';
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/** 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}";
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|