问显示活动菜单项

EN

Class Description_Walker extends Walker_Nav_Menu {


function display_element( $element, &$children_elements, $max_depth, $depth=0, $args, &$output ) {
$id_field = $this->db_fields['id'];
if ( is_object( $args[0] ) ) {
  $args[0]->has_children = ! empty( $children_elements[$element->$id_field] );
}
return parent::display_element( $element, $children_elements, $max_depth, $depth, $args, $output );
}

function start_lvl( &$output , $depth = 0 , $args = array() ) {
    $indent = str_repeat( "\t", $depth );
    $output .= "\n$indent<ul class=\"v-dropdown \">\n";
}



     function start_el(&$output, $item, $depth = 0, $args = array(), $current_object_id = 0)
  {
       global $wp_query;
       $indent = ( $depth ) ? str_repeat( "\t", $depth ) : '';

       $class_names = $value = '';

       $classes = empty( $item->classes ) ? array() : (array) $item->classes;

       $class_names = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item ) );

       $class_names = ' '. esc_attr( $class_names ) . '';


       $output .= $indent . '<li >';
       $attributes  = ! empty( $item->attr_title ) ? ' title="'  . esc_attr( $item->attr_title ) .'"' : '';
       $attributes .= ! empty( $item->target )     ? ' target="' . esc_attr( $item->target     ) .'"' : '';
       $attributes .= ! empty( $item->xfn )        ? ' rel="'    . esc_attr( $item->xfn        ) .'"' : '';
       $attributes .= ! empty( $item->url )        ? ' href="'   . esc_attr( $item->url        ) .'"' : '';
       $prepend='';

       $append = '';
       $description  = ! empty( $item->description ) ? '<span>'.esc_attr( $item->description ).'</span>' : '';


        $item_output = $args->before;

        if ( $args->has_children ) {
            $append="&nbsp;&#9662;";
                 $item_output .= '<a class="dropdown" data-hover="&nbsp">';
                 $item_output .= $args->link_before .$prepend.apply_filters( 'the_title', $item->title, $item->ID ).$append;
        $item_output .= $description.$args->link_after;
        $item_output .= '</a>';
        $item_output .= $args->after;

        } else {
                 $item_output .= '<a class="'.esc_attr( $class_names ).'" '. $attributes .' data-hover="&nbsp'.preg_replace('&nbsp;', $item->title).$append.'" >';
                 $item_output .= $args->link_before .$prepend.apply_filters( 'the_title', $item->title, $item->ID ).$append;
        $item_output .= $description.$args->link_after;
        $item_output .= '</a>';
        $item_output .= $args->after;

        }


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


        }