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Filename : walker.class.php
back
<?php

if ( ! defined( 'ABSPATH' ) ) {
	exit; // disable direct access
}


if ( ! class_exists( 'Mega_Menu_Walker' ) ) :

	/**
	 * Custom walker that extends Walker_Nav_Menu to integrate Mega Menu features,
	 * such as injecting widgets and custom classes into the menu output.
	 *
	 * @since   1.0
	 * @package MegaMenu
	 */
	class Mega_Menu_Walker extends Walker_Nav_Menu {

		/**
		 * Stores the current menu item being processed.
		 *
		 * @var object|null
		 */
		private $currentItem;

		/**
		 * Starts the list before the elements are added.
		 *
		 * @see Walker::start_lvl()
		 *
		 * @since 1.0
		 * @param string $output Passed by reference. Used to append additional content.
		 * @param int    $depth  Depth of menu item. Used for padding.
		 * @param array  $args   An array of arguments. @see wp_nav_menu()
		 * @return void
		 */
		public function start_lvl( &$output, $depth = 0, $args = [] ) {
			$style = "";
			$role = "";
			$id_attr = "";

			if ( $this->currentItem !== null ) {
				$id = $this->currentItem->ID;
				$classes = $this->currentItem->classes;

				if ( is_array( $classes ) && in_array( 'menu-row', $classes ) ) {
					if ( isset( $this->currentItem->styles ) && count( $this->currentItem->styles ) ) {
						$style = " style='" . esc_attr( implode( "; ", $this->currentItem->styles ) ) . "'";
					}
				}

				if ( is_array($classes) && array_intersect( ['menu-row', 'menu-grid'], $classes ) ) {
					$role = " role='presentation'";
				}

				if ( is_array($classes) && ! array_intersect( ['menu-row', 'menu-column'], $classes ) ) {
					$id_attr = " id='mega-sub-menu-{$id}'";
				}
			}
			
			$indent = str_repeat( "\t", $depth );

			$output .= "\n$indent<ul class=\"mega-sub-menu\"{$style}{$role}{$id_attr}>\n";
		}

		/**
		 * Ends the list after the elements are added.
		 *
		 * @see Walker::end_lvl()
		 *
		 * @since 1.0
		 * @param string $output Passed by reference. Used to append additional content.
		 * @param int    $depth  Depth of menu item. Used for padding.
		 * @param array  $args   An array of arguments. @see wp_nav_menu()
		 * @return void
		 */
		public function end_lvl( &$output, $depth = 0, $args = [] ) {
			$indent  = str_repeat( "\t", $depth );
			$output .= "$indent</ul>\n";
		}

		/**
		 * Custom walker that adds widgets and Mega Menu classes into the menu output.
		 *
		 * @see Walker::start_el()
		 *
		 * @since 1.0
		 * @param string $output Passed by reference. Used to append additional content.
		 * @param object $item   Menu item data object.
		 * @param int    $depth  Depth of menu item. Used for padding.
		 * @param array  $args   An array of arguments. @see wp_nav_menu()
		 * @param int    $id     Current item ID.
		 * @return void
		 */
		public function start_el( &$output, $item, $depth = 0, $args = [], $id = 0 ) {

			$this->currentItem = $item;

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

			if ( property_exists( $item, 'megamenu_settings' ) ) {
				$settings = $item->megamenu_settings;
			} else {
				$settings = Mega_Menu_Nav_Menus::get_menu_item_defaults();
			}

			// Item Class
			$classes = empty( $item->classes ) ? [] : (array) $item->classes;
			$styles = empty( $item->styles ) ? [] : (array) $item->styles;

			if ( is_array( $classes ) && ! in_array( 'menu-column', $classes ) && ! in_array( 'menu-row', $classes ) ) {
				$classes[] = 'menu-item-' . $item->ID;
			}

			// remove style attribute from rows
			if ( is_array( $classes ) && in_array( 'menu-row', $classes ) ) {
				$styles = [];
			}

			$class = join( ' ', apply_filters( 'megamenu_nav_menu_css_class', array_filter( $classes ), $item, $args ) );
			$style = join( '; ', apply_filters( 'megamenu_nav_menu_css_style', array_filter( $styles ), $item, $args ) );

			// these classes are prepended with 'mega-'
			$mega_classes = explode( ' ', $class );

			// strip widget classes back to how they're intended to be output
			$class = str_replace( 'mega-menu-widget-class-', '', $class );

			// Item ID
			if ( is_array( $classes ) && ! in_array( 'menu-column', $classes ) && ! in_array( 'menu-row', $classes ) ) {
				$id = "mega-menu-item-{$item->ID}";
			} else {
				$id = "mega-menu-{$item->ID}";
			}

			$id = esc_attr( apply_filters( 'megamenu_nav_menu_item_id', $id, $item, $args ) );

			$list_item_attributes = [
				'class' => $class,
				'style' => $style,
				'id' => $id
			];

			$attributes = '';

			foreach ( $list_item_attributes as $attr => $value ) {
				if ( strlen( $value ) ) {
					$attributes .= ' ' . $attr . '="' . esc_attr($value) . '"';
				}
			}

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

			// output the widgets
			if ( $item->type == 'widget' ) {

				if ( $item->content ) {
					$item_output = $item->content;
				} else {
					$item_output = "<!-- widget is empty -->";
				}

			} else {

				$atts = [];

				$atts['title']  = ! empty( $item->attr_title ) ? $item->attr_title : '';
				$atts['target'] = ! empty( $item->target ) ? $item->target : '';
				$atts['class']  = [];
				$atts['rel']    = ! empty( $item->xfn ) ? $item->xfn : '';
				$atts['href']   = ! empty( $item->url ) ? $item->url : '';

				if ( isset( $settings['disable_link'] ) && $settings['disable_link'] == 'true' ) {
					unset( $atts['href'] );
					$atts['tabindex'] = "0";
				}

				if ( isset( $settings['icon'] ) && $settings['icon'] != 'disabled' && $settings['icon'] != 'custom' ) {
					$atts['class'] = array_filter( explode( ' ', $settings['icon'] ) );
					$atts          = apply_filters( 'megamenu_icon_link_atts', $atts, $settings['icon'] );
				}

				if ( isset( $settings['icon'] ) && $settings['icon'] == 'custom' ) {
					$atts['class'] = [ 'mega-custom-icon' ];
				}

				// Convert class array to string before broader attribute filters and rendering.
				$atts['class'] = implode( ' ', array_unique( array_values( array_filter( $atts['class'] ) ) ) );

				if ( is_array( $classes ) && in_array( 'menu-item-has-children', $classes ) && ( $item->parent_submenu_type == 'flyout' || $item->parent_submenu_type == 'tabbed') ) {

					$atts['aria-expanded'] = 'false';
					$atts['aria-controls'] = 'mega-sub-menu-' . $item->ID;

					if ( is_array( $mega_classes ) && in_array( 'mega-toggle-on', $mega_classes ) ) {
						$atts['aria-expanded'] = 'true';
					}

					if ( isset( $settings['disable_link'] ) && $settings['disable_link'] == 'true' ) {
						$atts['role'] = 'button';
					}
				}

				if ( is_array( $classes ) && in_array( 'current-menu-item', $classes ) ) {
					$atts['aria-current'] = 'page';
				}

				if ( isset( $settings['hide_text'] ) && $settings['hide_text'] == 'true' ) {
					$atts['aria-label'] = $item->title;
				}

				$atts = apply_filters( 'megamenu_nav_menu_link_attributes', $atts, $item, $args );

				if ( isset( $atts['class'] ) && strlen( $atts['class'] ) ) {
					$atts['class'] = $atts['class'] . ' mega-menu-link';
				} else {
					$atts['class'] = 'mega-menu-link';
				}

				$attributes = '';

				foreach ( $atts as $attr => $value ) {
					if ( strlen( $value ) ) {
						$value       = ( 'href' === $attr ) ? esc_url( $value ) : esc_attr( $value );
						$attributes .= ' ' . $attr . '="' . $value . '"';
					}
				}

				$item_output  = $args->before;
				$item_output .= '<a' . $attributes . '>';

				if ( is_array( $classes ) && in_array( 'icon-top', $classes ) ) {
					$item_output .= "<span class='mega-title-below'>";
				}

			if ( isset( $settings['hide_text'] ) && $settings['hide_text'] == 'true' ) {
				// Title is hidden; aria-label is set on the anchor instead.
			} elseif ( property_exists( $item, 'mega_description' ) && strlen( $item->mega_description ) ) {
					$item_output .= '<span class="mega-description-group"><span class="mega-menu-title">' . $args->link_before . apply_filters( 'megamenu_the_title', $item->title, $item->ID ) . $args->link_after . '</span><span class="mega-menu-description">' . $item->description . '</span></span>';
				} else {
					$item_output .= $args->link_before . apply_filters( 'megamenu_the_title', $item->title, $item->ID ) . $args->link_after;
				}

				if ( is_array( $classes ) && in_array( 'icon-top', $classes ) ) {
					$item_output .= '</span>';
				}

				if ( is_array( $classes ) && in_array( 'menu-item-has-children', $classes ) ) {

					$item_output .= '<span class="mega-indicator"';

					$indicator_atts = [];
					$indicator_atts['aria-hidden'] = 'true';
					$indicator_atts = apply_filters( 'megamenu_indicator_atts', $indicator_atts, $item, $args, $mega_classes );

					foreach ( $indicator_atts as $attr => $value ) {
						if ( strlen( $value ) ) {
							$item_output .= ' ' . $attr . '="' . esc_attr( $value ) . '"';
						}
					}

					$item_output .= '></span>';
				}

				$item_output .= '</a>';

				$item_output .= $args->after;

				if ( is_array( $classes ) && ( in_array( 'menu-column', $classes ) || in_array( 'menu-row', $classes ) ) ) {
					$item_output = '';
				}
			}

			$output .= apply_filters( 'megamenu_walker_nav_menu_start_el', $item_output, $item, $depth, $args );
		}

		/**
		 * Ends the element output, if needed.
		 *
		 * @see Walker::end_el()
		 *
		 * @since 1.7
		 * @param string $output Passed by reference. Used to append additional content.
		 * @param object $item   Menu item data object.
		 * @param int    $depth  Depth of menu item. Not used.
		 * @param array  $args   An array of arguments. @see wp_nav_menu()
		 * @return void
		 */
		public function end_el( &$output, $item, $depth = 0, $args = [] ) {
			$output .= '</li>'; // remove new line to remove the 4px gap between menu items
		}
	}

endif;