<?php

/**

 * Navigation Menu API: Walker_Nav_Menu_Checklist class

 *

 * @package WordPress

 * @subpackage Administration

 * @since 4.4.0

 */

/**

 * Create HTML list of nav menu input items.

 *

 * @since 3.0.0

 * @uses Walker_Nav_Menu

 */

class Walker_Nav_Menu_Checklist extends Walker_Nav_Menu {

	/**

	 * @param array $fields

	 */

	public function __construct( $fields = false ) {

		if ( $fields ) {

			$this->db_fields = $fields;

		}

	}

	/**

	 * Starts the list before the elements are added.

	 *

	 * @see Walker_Nav_Menu::start_lvl()

	 *

	 * @since 3.0.0

	 *

	 * @param string $output Used to append additional content (passed by reference).

	 * @param int    $depth  Depth of page. Used for padding.

	 * @param array  $args   Not used.

	 */

	public function start_lvl( &$output, $depth = 0, $args = array() ) {

		$output .= "\n$indent<ul class='children'>\n";

	}

	/**

	 * Ends the list of after the elements are added.

	 *

	 * @see Walker_Nav_Menu::end_lvl()

	 *

	 * @since 3.0.0

	 *

	 * @param string $output Used to append additional content (passed by reference).

	 * @param int    $depth  Depth of page. Used for padding.

	 * @param array  $args   Not used.

	 */

	public function end_lvl( &$output, $depth = 0, $args = array() ) {

		$output .= "\n$indent</ul>";

	}

	/**

	 * Start the element output.

	 *

	 * @see Walker_Nav_Menu::start_el()

	 *

	 * @since 3.0.0

	 *

	 * @global int $_nav_menu_placeholder

	 *

	 * @param string $output Used to append additional content (passed by reference).

	 * @param object $item   Menu item data object.

	 * @param int    $depth  Depth of menu item. Used for padding.

	 * @param array  $args   Not used.

	 * @param int    $id     Not used.

	 */

	public function start_el( &$output, $item, $depth = 0, $args = array(), $id = 0 ) {

		global $_nav_menu_placeholder;

		$indent = ( $depth ) ? str_repeat( "\t", $depth ) : '';

		$output .= $indent . '<li>';

		$output .= '<label class="menu-item-title">';

		$output .= '<input type="checkbox" class="menu-item-checkbox';

			$output .= ' add-to-top';

		if ( ! empty( $item->label ) ) {

			$title = $item->label;

		} elseif ( isset( $item->post_type ) ) {

			/** This filter is documented in wp-includes/post-template.php */

			$title = apply_filters( 'the_title', $item->post_title, $item->ID );

				$title = sprintf( _x( 'Home: %s', 'nav menu front page title' ), $title );

		}

		$output .= isset( $title ) ? esc_html( $title ) : esc_html( $item->title );

		// Menu item hidden fields

		$output .= '<input type="hidden" class="menu-item-db-id" name="menu-item[' . $possible_object_id . '][menu-item-db-id]" value="' . $possible_db_id . '" />';

	}

} // Walker_Nav_Menu_Checklist